summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorJiri Kosina <jkosina@suse.cz>2013-01-29 10:48:30 +0100
committerJiri Kosina <jkosina@suse.cz>2013-01-29 10:48:30 +0100
commit617677295b53a40d0e54aac4cbbc216ffbc755dd (patch)
tree51b9e87213243ed5efff252c8e8d8fec4eebc588 /fs
parent5c8d1b68e01a144813e38795fe6dbe7ebb506131 (diff)
parent6abb7c25775b7fb2225ad0508236d63ca710e65f (diff)
downloadlinux-617677295b53a40d0e54aac4cbbc216ffbc755dd.tar.gz
linux-617677295b53a40d0e54aac4cbbc216ffbc755dd.tar.bz2
linux-617677295b53a40d0e54aac4cbbc216ffbc755dd.zip
Merge branch 'master' into for-next
Conflicts: drivers/devfreq/exynos4_bus.c Sync with Linus' tree to be able to apply patches that are against newer code (mvneta).
Diffstat (limited to 'fs')
-rw-r--r--fs/Kconfig15
-rw-r--r--fs/Makefile1
-rw-r--r--fs/adfs/inode.c15
-rw-r--r--fs/affs/file.c18
-rw-r--r--fs/affs/inode.c5
-rw-r--r--fs/attr.c11
-rw-r--r--fs/autofs4/autofs_i.h8
-rw-r--r--fs/autofs4/dev-ioctl.c4
-rw-r--r--fs/autofs4/expire.c9
-rw-r--r--fs/autofs4/inode.c24
-rw-r--r--fs/autofs4/root.c83
-rw-r--r--fs/autofs4/waitq.c5
-rw-r--r--fs/bad_inode.c2
-rw-r--r--fs/bfs/file.c15
-rw-r--r--fs/binfmt_aout.c5
-rw-r--r--fs/binfmt_elf.c9
-rw-r--r--fs/binfmt_elf_fdpic.c6
-rw-r--r--fs/binfmt_em86.c5
-rw-r--r--fs/binfmt_flat.c5
-rw-r--r--fs/binfmt_misc.c15
-rw-r--r--fs/binfmt_script.c12
-rw-r--r--fs/binfmt_som.c5
-rw-r--r--fs/bio.c6
-rw-r--r--fs/block_dev.c133
-rw-r--r--fs/btrfs/Makefile2
-rw-r--r--fs/btrfs/acl.c2
-rw-r--r--fs/btrfs/backref.c16
-rw-r--r--fs/btrfs/btrfs_inode.h4
-rw-r--r--fs/btrfs/check-integrity.c31
-rw-r--r--fs/btrfs/compression.c6
-rw-r--r--fs/btrfs/ctree.c229
-rw-r--r--fs/btrfs/ctree.h182
-rw-r--r--fs/btrfs/delayed-inode.c11
-rw-r--r--fs/btrfs/dev-replace.c856
-rw-r--r--fs/btrfs/dev-replace.h44
-rw-r--r--fs/btrfs/dir-item.c59
-rw-r--r--fs/btrfs/disk-io.c146
-rw-r--r--fs/btrfs/disk-io.h4
-rw-r--r--fs/btrfs/extent-tree.c231
-rw-r--r--fs/btrfs/extent_io.c37
-rw-r--r--fs/btrfs/extent_io.h4
-rw-r--r--fs/btrfs/extent_map.c37
-rw-r--r--fs/btrfs/extent_map.h3
-rw-r--r--fs/btrfs/file-item.c25
-rw-r--r--fs/btrfs/file.c435
-rw-r--r--fs/btrfs/free-space-cache.c71
-rw-r--r--fs/btrfs/inode-map.c5
-rw-r--r--fs/btrfs/inode.c617
-rw-r--r--fs/btrfs/ioctl.c406
-rw-r--r--fs/btrfs/ioctl.h48
-rw-r--r--fs/btrfs/math.h44
-rw-r--r--fs/btrfs/ordered-data.c90
-rw-r--r--fs/btrfs/ordered-data.h7
-rw-r--r--fs/btrfs/print-tree.c3
-rw-r--r--fs/btrfs/qgroup.c20
-rw-r--r--fs/btrfs/reada.c31
-rw-r--r--fs/btrfs/relocation.c40
-rw-r--r--fs/btrfs/root-tree.c4
-rw-r--r--fs/btrfs/scrub.c1836
-rw-r--r--fs/btrfs/send.c12
-rw-r--r--fs/btrfs/super.c50
-rw-r--r--fs/btrfs/transaction.c187
-rw-r--r--fs/btrfs/transaction.h2
-rw-r--r--fs/btrfs/tree-log.c485
-rw-r--r--fs/btrfs/volumes.c981
-rw-r--r--fs/btrfs/volumes.h35
-rw-r--r--fs/btrfs/xattr.c13
-rw-r--r--fs/buffer.c164
-rw-r--r--fs/cachefiles/interface.c57
-rw-r--r--fs/cachefiles/internal.h2
-rw-r--r--fs/cachefiles/key.c2
-rw-r--r--fs/cachefiles/namei.c3
-rw-r--r--fs/cachefiles/rdwr.c114
-rw-r--r--fs/cachefiles/xattr.c2
-rw-r--r--fs/ceph/addr.c60
-rw-r--r--fs/ceph/caps.c18
-rw-r--r--fs/ceph/dir.c4
-rw-r--r--fs/ceph/export.c6
-rw-r--r--fs/ceph/file.c79
-rw-r--r--fs/ceph/inode.c15
-rw-r--r--fs/ceph/mds_client.c11
-rw-r--r--fs/ceph/super.c4
-rw-r--r--fs/cifs/Kconfig10
-rw-r--r--fs/cifs/cifs_debug.h72
-rw-r--r--fs/cifs/cifs_dfs_ref.c2
-rw-r--r--fs/cifs/cifsacl.c777
-rw-r--r--fs/cifs/cifsacl.h66
-rw-r--r--fs/cifs/cifsfs.c25
-rw-r--r--fs/cifs/cifsglob.h36
-rw-r--r--fs/cifs/cifsproto.h10
-rw-r--r--fs/cifs/connect.c313
-rw-r--r--fs/cifs/dir.c43
-rw-r--r--fs/cifs/file.c215
-rw-r--r--fs/cifs/inode.c7
-rw-r--r--fs/cifs/netmisc.c14
-rw-r--r--fs/cifs/readdir.c72
-rw-r--r--fs/cifs/smb1ops.c43
-rw-r--r--fs/cifs/smb2file.c12
-rw-r--r--fs/cifs/smb2ops.c105
-rw-r--r--fs/cifs/smb2pdu.c5
-rw-r--r--fs/cifs/smb2proto.h4
-rw-r--r--fs/cifs/smb2transport.c13
-rw-r--r--fs/cifs/transport.c6
-rw-r--r--fs/compat_ioctl.c3
-rw-r--r--fs/configfs/dir.c4
-rw-r--r--fs/coredump.c4
-rw-r--r--fs/dcache.c35
-rw-r--r--fs/debugfs/inode.c3
-rw-r--r--fs/devpts/inode.c61
-rw-r--r--fs/direct-io.c8
-rw-r--r--fs/dlm/Kconfig2
-rw-r--r--fs/dlm/dlm_internal.h1
-rw-r--r--fs/dlm/lock.c16
-rw-r--r--fs/dlm/lowcomms.c5
-rw-r--r--fs/dlm/recover.c37
-rw-r--r--fs/ecryptfs/crypto.c2
-rw-r--r--fs/ecryptfs/kthread.c6
-rw-r--r--fs/ecryptfs/mmap.c12
-rw-r--r--fs/eventfd.c20
-rw-r--r--fs/eventpoll.c88
-rw-r--r--fs/exec.c89
-rw-r--r--fs/exofs/inode.c16
-rw-r--r--fs/exportfs/expfs.c23
-rw-r--r--fs/ext3/balloc.c5
-rw-r--r--fs/ext3/dir.c6
-rw-r--r--fs/ext3/inode.c3
-rw-r--r--fs/ext3/super.c3
-rw-r--r--fs/ext4/Kconfig17
-rw-r--r--fs/ext4/Makefile4
-rw-r--r--fs/ext4/acl.c6
-rw-r--r--fs/ext4/dir.c47
-rw-r--r--fs/ext4/ext4.h165
-rw-r--r--fs/ext4/ext4_extents.h40
-rw-r--r--fs/ext4/ext4_jbd2.h7
-rw-r--r--fs/ext4/extents.c502
-rw-r--r--fs/ext4/extents_status.c500
-rw-r--r--fs/ext4/extents_status.h45
-rw-r--r--fs/ext4/file.c346
-rw-r--r--fs/ext4/fsync.c8
-rw-r--r--fs/ext4/ialloc.c25
-rw-r--r--fs/ext4/indirect.c5
-rw-r--r--fs/ext4/inline.c1884
-rw-r--r--fs/ext4/inode.c728
-rw-r--r--fs/ext4/mballoc.c60
-rw-r--r--fs/ext4/migrate.c1
-rw-r--r--fs/ext4/move_extent.c1
-rw-r--r--fs/ext4/namei.c535
-rw-r--r--fs/ext4/page-io.c3
-rw-r--r--fs/ext4/resize.c17
-rw-r--r--fs/ext4/super.c87
-rw-r--r--fs/ext4/symlink.c4
-rw-r--r--fs/ext4/xattr.c110
-rw-r--r--fs/ext4/xattr.h158
-rw-r--r--fs/f2fs/Kconfig53
-rw-r--r--fs/f2fs/Makefile7
-rw-r--r--fs/f2fs/acl.c412
-rw-r--r--fs/f2fs/acl.h57
-rw-r--r--fs/f2fs/checkpoint.c793
-rw-r--r--fs/f2fs/data.c718
-rw-r--r--fs/f2fs/debug.c353
-rw-r--r--fs/f2fs/dir.c674
-rw-r--r--fs/f2fs/f2fs.h1087
-rw-r--r--fs/f2fs/file.c646
-rw-r--r--fs/f2fs/gc.c716
-rw-r--r--fs/f2fs/gc.h117
-rw-r--r--fs/f2fs/hash.c101
-rw-r--r--fs/f2fs/inode.c272
-rw-r--r--fs/f2fs/namei.c503
-rw-r--r--fs/f2fs/node.c1760
-rw-r--r--fs/f2fs/node.h353
-rw-r--r--fs/f2fs/recovery.c377
-rw-r--r--fs/f2fs/segment.c1757
-rw-r--r--fs/f2fs/segment.h631
-rw-r--r--fs/f2fs/super.c701
-rw-r--r--fs/f2fs/xattr.c443
-rw-r--r--fs/f2fs/xattr.h145
-rw-r--r--fs/fat/dir.c5
-rw-r--r--fs/fat/fat.h3
-rw-r--r--fs/fat/inode.c57
-rw-r--r--fs/fat/misc.c13
-rw-r--r--fs/fhandle.c2
-rw-r--r--fs/file.c27
-rw-r--r--fs/file_table.c2
-rw-r--r--fs/fs-writeback.c4
-rw-r--r--fs/fs_struct.c24
-rw-r--r--fs/fscache/cache.c8
-rw-r--r--fs/fscache/cookie.c78
-rw-r--r--fs/fscache/internal.h15
-rw-r--r--fs/fscache/object-list.c2
-rw-r--r--fs/fscache/object.c101
-rw-r--r--fs/fscache/operation.c140
-rw-r--r--fs/fscache/page.c195
-rw-r--r--fs/fscache/stats.c17
-rw-r--r--fs/fuse/Kconfig16
-rw-r--r--fs/fuse/cuse.c36
-rw-r--r--fs/fuse/dev.c9
-rw-r--r--fs/fuse/dir.c20
-rw-r--r--fs/fuse/file.c13
-rw-r--r--fs/fuse/fuse_i.h4
-rw-r--r--fs/fuse/inode.c23
-rw-r--r--fs/gfs2/aops.c2
-rw-r--r--fs/gfs2/bmap.c54
-rw-r--r--fs/gfs2/dir.c7
-rw-r--r--fs/gfs2/file.c28
-rw-r--r--fs/gfs2/glock.c42
-rw-r--r--fs/gfs2/glock.h54
-rw-r--r--fs/gfs2/glops.c19
-rw-r--r--fs/gfs2/incore.h6
-rw-r--r--fs/gfs2/inode.c209
-rw-r--r--fs/gfs2/lock_dlm.c26
-rw-r--r--fs/gfs2/lops.c16
-rw-r--r--fs/gfs2/ops_fstype.c3
-rw-r--r--fs/gfs2/quota.c17
-rw-r--r--fs/gfs2/rgrp.c201
-rw-r--r--fs/gfs2/rgrp.h3
-rw-r--r--fs/gfs2/super.c3
-rw-r--r--fs/gfs2/trace_gfs2.h2
-rw-r--r--fs/gfs2/trans.c8
-rw-r--r--fs/gfs2/xattr.c2
-rw-r--r--fs/hfs/inode.c26
-rw-r--r--fs/hfsplus/bitmap.c13
-rw-r--r--fs/hfsplus/btree.c5
-rw-r--r--fs/hfsplus/extents.c24
-rw-r--r--fs/hfsplus/hfsplus_fs.h2
-rw-r--r--fs/hfsplus/inode.c27
-rw-r--r--fs/hfsplus/super.c15
-rw-r--r--fs/hpfs/file.c20
-rw-r--r--fs/hpfs/hpfs_fn.h1
-rw-r--r--fs/hpfs/inode.c5
-rw-r--r--fs/hppfs/hppfs.c2
-rw-r--r--fs/hugetlbfs/inode.c109
-rw-r--r--fs/inode.c18
-rw-r--r--fs/internal.h1
-rw-r--r--fs/jbd/journal.c3
-rw-r--r--fs/jbd/transaction.c2
-rw-r--r--fs/jbd2/journal.c1
-rw-r--r--fs/jbd2/transaction.c41
-rw-r--r--fs/jffs2/file.c39
-rw-r--r--fs/jffs2/nodemgmt.c6
-rw-r--r--fs/jfs/file.c6
-rw-r--r--fs/jfs/inode.c20
-rw-r--r--fs/libfs.c6
-rw-r--r--fs/lockd/clnt4xdr.c8
-rw-r--r--fs/lockd/clntproc.c3
-rw-r--r--fs/lockd/clntxdr.c8
-rw-r--r--fs/lockd/host.c15
-rw-r--r--fs/lockd/mon.c3
-rw-r--r--fs/logfs/readwrite.c10
-rw-r--r--fs/minix/file.c6
-rw-r--r--fs/minix/inode.c17
-rw-r--r--fs/mount.h3
-rw-r--r--fs/namei.c123
-rw-r--r--fs/namespace.c214
-rw-r--r--fs/ncpfs/inode.c4
-rw-r--r--fs/nfs/Makefile2
-rw-r--r--fs/nfs/blocklayout/blocklayout.c1
-rw-r--r--fs/nfs/cache_lib.c1
-rw-r--r--fs/nfs/callback.h4
-rw-r--r--fs/nfs/callback_proc.c19
-rw-r--r--fs/nfs/callback_xdr.c5
-rw-r--r--fs/nfs/client.c9
-rw-r--r--fs/nfs/dir.c51
-rw-r--r--fs/nfs/direct.c17
-rw-r--r--fs/nfs/dns_resolve.c5
-rw-r--r--fs/nfs/file.c10
-rw-r--r--fs/nfs/fscache.c1
-rw-r--r--fs/nfs/fscache.h21
-rw-r--r--fs/nfs/idmap.c12
-rw-r--r--fs/nfs/inode.c35
-rw-r--r--fs/nfs/internal.h48
-rw-r--r--fs/nfs/mount_clnt.c9
-rw-r--r--fs/nfs/namespace.c19
-rw-r--r--fs/nfs/nfs2xdr.c4
-rw-r--r--fs/nfs/nfs3proc.c6
-rw-r--r--fs/nfs/nfs3xdr.c7
-rw-r--r--fs/nfs/nfs4_fs.h29
-rw-r--r--fs/nfs/nfs4client.c5
-rw-r--r--fs/nfs/nfs4file.c3
-rw-r--r--fs/nfs/nfs4filelayout.c45
-rw-r--r--fs/nfs/nfs4filelayoutdev.c3
-rw-r--r--fs/nfs/nfs4namespace.c3
-rw-r--r--fs/nfs/nfs4proc.c861
-rw-r--r--fs/nfs/nfs4session.c552
-rw-r--r--fs/nfs/nfs4session.h142
-rw-r--r--fs/nfs/nfs4state.c143
-rw-r--r--fs/nfs/nfs4super.c1
-rw-r--r--fs/nfs/nfs4xdr.c52
-rw-r--r--fs/nfs/objlayout/objlayout.c11
-rw-r--r--fs/nfs/pnfs.c23
-rw-r--r--fs/nfs/proc.c43
-rw-r--r--fs/nfs/read.c10
-rw-r--r--fs/nfs/super.c74
-rw-r--r--fs/nfs/unlink.c2
-rw-r--r--fs/nfs/write.c44
-rw-r--r--fs/nfsd/fault_inject.c113
-rw-r--r--fs/nfsd/fault_inject.h28
-rw-r--r--fs/nfsd/netns.h66
-rw-r--r--fs/nfsd/nfs2acl.c2
-rw-r--r--fs/nfsd/nfs3acl.c2
-rw-r--r--fs/nfsd/nfs3proc.c6
-rw-r--r--fs/nfsd/nfs3xdr.c47
-rw-r--r--fs/nfsd/nfs4callback.c69
-rw-r--r--fs/nfsd/nfs4proc.c74
-rw-r--r--fs/nfsd/nfs4recover.c561
-rw-r--r--fs/nfsd/nfs4state.c1015
-rw-r--r--fs/nfsd/nfs4xdr.c324
-rw-r--r--fs/nfsd/nfsctl.c100
-rw-r--r--fs/nfsd/nfsd.h36
-rw-r--r--fs/nfsd/nfsfh.c4
-rw-r--r--fs/nfsd/nfssvc.c203
-rw-r--r--fs/nfsd/nfsxdr.c11
-rw-r--r--fs/nfsd/state.h64
-rw-r--r--fs/nfsd/vfs.c52
-rw-r--r--fs/nfsd/xdr4.h15
-rw-r--r--fs/nilfs2/file.c1
-rw-r--r--fs/nilfs2/inode.c24
-rw-r--r--fs/nilfs2/nilfs.h1
-rw-r--r--fs/nilfs2/page.c2
-rw-r--r--fs/nilfs2/recovery.c3
-rw-r--r--fs/notify/Makefile2
-rw-r--r--fs/notify/dnotify/dnotify.c4
-rw-r--r--fs/notify/fanotify/fanotify.c7
-rw-r--r--fs/notify/fanotify/fanotify_user.c42
-rw-r--r--fs/notify/fdinfo.c179
-rw-r--r--fs/notify/fdinfo.h27
-rw-r--r--fs/notify/group.c47
-rw-r--r--fs/notify/inode_mark.c19
-rw-r--r--fs/notify/inotify/inotify_fsnotify.c4
-rw-r--r--fs/notify/inotify/inotify_user.c36
-rw-r--r--fs/notify/mark.c91
-rw-r--r--fs/notify/notification.c1
-rw-r--r--fs/notify/vfsmount_mark.c14
-rw-r--r--fs/ntfs/file.c16
-rw-r--r--fs/ntfs/inode.c8
-rw-r--r--fs/ntfs/inode.h4
-rw-r--r--fs/ocfs2/extent_map.c12
-rw-r--r--fs/ocfs2/file.c29
-rw-r--r--fs/omfs/file.c22
-rw-r--r--fs/open.c99
-rw-r--r--fs/pnode.h1
-rw-r--r--fs/proc/Makefile1
-rw-r--r--fs/proc/array.c27
-rw-r--r--fs/proc/base.c300
-rw-r--r--fs/proc/fd.c2
-rw-r--r--fs/proc/generic.c48
-rw-r--r--fs/proc/inode.c6
-rw-r--r--fs/proc/internal.h1
-rw-r--r--fs/proc/kcore.c2
-rw-r--r--fs/proc/namespaces.c185
-rw-r--r--fs/proc/proc_devtree.c6
-rw-r--r--fs/proc/proc_sysctl.c16
-rw-r--r--fs/proc/root.c17
-rw-r--r--fs/proc/self.c59
-rw-r--r--fs/proc/task_mmu.c61
-rw-r--r--fs/pstore/ftrace.c4
-rw-r--r--fs/pstore/inode.c13
-rw-r--r--fs/pstore/internal.h2
-rw-r--r--fs/pstore/platform.c14
-rw-r--r--fs/pstore/ram.c43
-rw-r--r--fs/pstore/ram_core.c9
-rw-r--r--fs/quota/quota.c4
-rw-r--r--fs/read_write.c42
-rw-r--r--fs/reiserfs/file.c3
-rw-r--r--fs/reiserfs/inode.c25
-rw-r--r--fs/reiserfs/reiserfs.h1
-rw-r--r--fs/reiserfs/stree.c4
-rw-r--r--fs/reiserfs/super.c60
-rw-r--r--fs/seq_file.c6
-rw-r--r--fs/signalfd.c18
-rw-r--r--fs/splice.c9
-rw-r--r--fs/stat.c16
-rw-r--r--fs/statfs.c9
-rw-r--r--fs/sysfs/file.c4
-rw-r--r--fs/sysfs/mount.c1
-rw-r--r--fs/sysv/file.c5
-rw-r--r--fs/sysv/itree.c17
-rw-r--r--fs/ubifs/debug.c8
-rw-r--r--fs/ubifs/dir.c4
-rw-r--r--fs/ubifs/find.c12
-rw-r--r--fs/ubifs/lprops.c6
-rw-r--r--fs/ubifs/ubifs.h3
-rw-r--r--fs/udf/inode.c14
-rw-r--r--fs/udf/super.c3
-rw-r--r--fs/ufs/inode.c15
-rw-r--r--fs/utimes.c6
-rw-r--r--fs/xattr.c72
-rw-r--r--fs/xfs/Kconfig1
-rw-r--r--fs/xfs/Makefile4
-rw-r--r--fs/xfs/uuid.h6
-rw-r--r--fs/xfs/xfs_ag.h5
-rw-r--r--fs/xfs/xfs_alloc.c183
-rw-r--r--fs/xfs/xfs_alloc.h6
-rw-r--r--fs/xfs/xfs_alloc_btree.c79
-rw-r--r--fs/xfs/xfs_alloc_btree.h2
-rw-r--r--fs/xfs/xfs_aops.c137
-rw-r--r--fs/xfs/xfs_attr.c103
-rw-r--r--fs/xfs/xfs_attr_leaf.c163
-rw-r--r--fs/xfs/xfs_attr_leaf.h6
-rw-r--r--fs/xfs/xfs_bmap.c127
-rw-r--r--fs/xfs/xfs_bmap.h9
-rw-r--r--fs/xfs/xfs_bmap_btree.c63
-rw-r--r--fs/xfs/xfs_bmap_btree.h1
-rw-r--r--fs/xfs/xfs_btree.c111
-rw-r--r--fs/xfs/xfs_btree.h22
-rw-r--r--fs/xfs/xfs_buf.c85
-rw-r--r--fs/xfs/xfs_buf.h33
-rw-r--r--fs/xfs/xfs_buf_item.c67
-rw-r--r--fs/xfs/xfs_buf_item.h2
-rw-r--r--fs/xfs/xfs_cksum.h63
-rw-r--r--fs/xfs/xfs_da_btree.c141
-rw-r--r--fs/xfs/xfs_da_btree.h10
-rw-r--r--fs/xfs/xfs_dfrag.c13
-rw-r--r--fs/xfs/xfs_dir2_block.c434
-rw-r--r--fs/xfs/xfs_dir2_data.c170
-rw-r--r--fs/xfs/xfs_dir2_leaf.c172
-rw-r--r--fs/xfs/xfs_dir2_node.c288
-rw-r--r--fs/xfs/xfs_dir2_priv.h19
-rw-r--r--fs/xfs/xfs_dquot.c134
-rw-r--r--fs/xfs/xfs_dquot.h2
-rw-r--r--fs/xfs/xfs_export.c1
-rw-r--r--fs/xfs/xfs_file.c42
-rw-r--r--fs/xfs/xfs_fs.h33
-rw-r--r--fs/xfs/xfs_fs_subr.c96
-rw-r--r--fs/xfs/xfs_fsops.c158
-rw-r--r--fs/xfs/xfs_globals.c4
-rw-r--r--fs/xfs/xfs_ialloc.c84
-rw-r--r--fs/xfs/xfs_ialloc.h4
-rw-r--r--fs/xfs/xfs_ialloc_btree.c55
-rw-r--r--fs/xfs/xfs_ialloc_btree.h2
-rw-r--r--fs/xfs/xfs_icache.c (renamed from fs/xfs/xfs_sync.c)914
-rw-r--r--fs/xfs/xfs_icache.h (renamed from fs/xfs/xfs_sync.h)28
-rw-r--r--fs/xfs/xfs_iget.c705
-rw-r--r--fs/xfs/xfs_inode.c440
-rw-r--r--fs/xfs/xfs_inode.h12
-rw-r--r--fs/xfs/xfs_ioctl.c23
-rw-r--r--fs/xfs/xfs_iomap.c35
-rw-r--r--fs/xfs/xfs_iops.c8
-rw-r--r--fs/xfs/xfs_itable.c4
-rw-r--r--fs/xfs/xfs_linux.h2
-rw-r--r--fs/xfs/xfs_log.c260
-rw-r--r--fs/xfs/xfs_log.h4
-rw-r--r--fs/xfs/xfs_log_priv.h12
-rw-r--r--fs/xfs/xfs_log_recover.c148
-rw-r--r--fs/xfs/xfs_mount.c163
-rw-r--r--fs/xfs/xfs_mount.h13
-rw-r--r--fs/xfs/xfs_qm.c22
-rw-r--r--fs/xfs/xfs_qm_syscalls.c10
-rw-r--r--fs/xfs/xfs_rtalloc.c16
-rw-r--r--fs/xfs/xfs_sb.h7
-rw-r--r--fs/xfs/xfs_super.c148
-rw-r--r--fs/xfs/xfs_super.h1
-rw-r--r--fs/xfs/xfs_sysctl.c9
-rw-r--r--fs/xfs/xfs_sysctl.h1
-rw-r--r--fs/xfs/xfs_trace.h60
-rw-r--r--fs/xfs/xfs_trans.h19
-rw-r--r--fs/xfs/xfs_trans_buf.c36
-rw-r--r--fs/xfs/xfs_vnodeops.c168
-rw-r--r--fs/xfs/xfs_vnodeops.h9
458 files changed, 34025 insertions, 10307 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index f95ae3a027f3..780725a463b1 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -28,8 +28,8 @@ config FS_MBCACHE
tristate
default y if EXT2_FS=y && EXT2_FS_XATTR
default y if EXT3_FS=y && EXT3_FS_XATTR
- default y if EXT4_FS=y && EXT4_FS_XATTR
- default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS_XATTR
+ default y if EXT4_FS=y
+ default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS
source "fs/reiserfs/Kconfig"
source "fs/jfs/Kconfig"
@@ -68,16 +68,6 @@ source "fs/quota/Kconfig"
source "fs/autofs4/Kconfig"
source "fs/fuse/Kconfig"
-config CUSE
- tristate "Character device in Userspace support"
- depends on FUSE_FS
- help
- This FUSE extension allows character devices to be
- implemented in userspace.
-
- If you want to develop or use userspace character device
- based on CUSE, answer Y or M.
-
config GENERIC_ACL
bool
select FS_POSIX_ACL
@@ -220,6 +210,7 @@ source "fs/pstore/Kconfig"
source "fs/sysv/Kconfig"
source "fs/ufs/Kconfig"
source "fs/exofs/Kconfig"
+source "fs/f2fs/Kconfig"
endif # MISC_FILESYSTEMS
diff --git a/fs/Makefile b/fs/Makefile
index 1d7af79288a0..9d53192236fc 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -123,6 +123,7 @@ obj-$(CONFIG_DEBUG_FS) += debugfs/
obj-$(CONFIG_OCFS2_FS) += ocfs2/
obj-$(CONFIG_BTRFS_FS) += btrfs/
obj-$(CONFIG_GFS2_FS) += gfs2/
+obj-$(CONFIG_F2FS_FS) += f2fs/
obj-y += exofs/ # Multiple modules
obj-$(CONFIG_CEPH_FS) += ceph/
obj-$(CONFIG_PSTORE) += pstore/
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index e9bad5093a3f..5f95d1ed9c6d 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -45,6 +45,14 @@ static int adfs_readpage(struct file *file, struct page *page)
return block_read_full_page(page, adfs_get_block);
}
+static void adfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size)
+ truncate_pagecache(inode, to, inode->i_size);
+}
+
static int adfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -55,11 +63,8 @@ static int adfs_write_begin(struct file *file, struct address_space *mapping,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
adfs_get_block,
&ADFS_I(mapping->host)->mmu_private);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ adfs_write_failed(mapping, pos + len);
return ret;
}
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 2f4c935cb327..af3261b78102 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -39,7 +39,6 @@ const struct file_operations affs_file_operations = {
};
const struct inode_operations affs_file_inode_operations = {
- .truncate = affs_truncate,
.setattr = affs_notify_change,
};
@@ -402,6 +401,16 @@ static int affs_readpage(struct file *file, struct page *page)
return block_read_full_page(page, affs_get_block);
}
+static void affs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ affs_truncate(inode);
+ }
+}
+
static int affs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -412,11 +421,8 @@ static int affs_write_begin(struct file *file, struct address_space *mapping,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
affs_get_block,
&AFFS_I(mapping->host)->mmu_private);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ affs_write_failed(mapping, pos + len);
return ret;
}
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 15c484268229..0e092d08680e 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -237,9 +237,12 @@ affs_notify_change(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
+ error = inode_newsize_ok(inode, attr->ia_size);
if (error)
return error;
+
+ truncate_setsize(inode, attr->ia_size);
+ affs_truncate(inode);
}
setattr_copy(inode, attr);
diff --git a/fs/attr.c b/fs/attr.c
index cce7df53b694..1449adb14ef6 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -49,14 +49,15 @@ int inode_change_ok(const struct inode *inode, struct iattr *attr)
/* Make sure a caller can chown. */
if ((ia_valid & ATTR_UID) &&
(!uid_eq(current_fsuid(), inode->i_uid) ||
- !uid_eq(attr->ia_uid, inode->i_uid)) && !capable(CAP_CHOWN))
+ !uid_eq(attr->ia_uid, inode->i_uid)) &&
+ !inode_capable(inode, CAP_CHOWN))
return -EPERM;
/* Make sure caller can chgrp. */
if ((ia_valid & ATTR_GID) &&
(!uid_eq(current_fsuid(), inode->i_uid) ||
(!in_group_p(attr->ia_gid) && !gid_eq(attr->ia_gid, inode->i_gid))) &&
- !capable(CAP_CHOWN))
+ !inode_capable(inode, CAP_CHOWN))
return -EPERM;
/* Make sure a caller can chmod. */
@@ -65,7 +66,8 @@ int inode_change_ok(const struct inode *inode, struct iattr *attr)
return -EPERM;
/* Also check the setgid bit! */
if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
- inode->i_gid) && !capable(CAP_FSETID))
+ inode->i_gid) &&
+ !inode_capable(inode, CAP_FSETID))
attr->ia_mode &= ~S_ISGID;
}
@@ -157,7 +159,8 @@ void setattr_copy(struct inode *inode, const struct iattr *attr)
if (ia_valid & ATTR_MODE) {
umode_t mode = attr->ia_mode;
- if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
+ if (!in_group_p(inode->i_gid) &&
+ !inode_capable(inode, CAP_FSETID))
mode &= ~S_ISGID;
inode->i_mode = mode;
}
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 908e18455413..b785e7707959 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -74,8 +74,8 @@ struct autofs_info {
unsigned long last_used;
atomic_t count;
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
};
#define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */
@@ -89,8 +89,8 @@ struct autofs_wait_queue {
struct qstr name;
u32 dev;
u64 ino;
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
pid_t pid;
pid_t tgid;
/* This is for status reporting upon return */
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index a16214109d31..9f68a37bb2b2 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -437,8 +437,8 @@ static int autofs_dev_ioctl_requester(struct file *fp,
err = 0;
autofs4_expire_wait(path.dentry);
spin_lock(&sbi->fs_lock);
- param->requester.uid = ino->uid;
- param->requester.gid = ino->gid;
+ param->requester.uid = from_kuid_munged(current_user_ns(), ino->uid);
+ param->requester.gid = from_kgid_munged(current_user_ns(), ino->gid);
spin_unlock(&sbi->fs_lock);
}
path_put(&path);
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 842d00048a65..01443ce43ee7 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -548,15 +548,6 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_EXPIRING;
- spin_lock(&dentry->d_lock);
- if (!ret) {
- if ((IS_ROOT(dentry) ||
- (autofs_type_indirect(sbi->type) &&
- IS_ROOT(dentry->d_parent))) &&
- !(dentry->d_flags & DCACHE_NEED_AUTOMOUNT))
- __managed_dentry_set_automount(dentry);
- }
- spin_unlock(&dentry->d_lock);
complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
dput(dentry);
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 8a4fed8ead30..b104726e2d0a 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -36,8 +36,8 @@ struct autofs_info *autofs4_new_ino(struct autofs_sb_info *sbi)
void autofs4_clean_ino(struct autofs_info *ino)
{
- ino->uid = 0;
- ino->gid = 0;
+ ino->uid = GLOBAL_ROOT_UID;
+ ino->gid = GLOBAL_ROOT_GID;
ino->last_used = jiffies;
}
@@ -79,10 +79,12 @@ static int autofs4_show_options(struct seq_file *m, struct dentry *root)
return 0;
seq_printf(m, ",fd=%d", sbi->pipefd);
- if (root_inode->i_uid != 0)
- seq_printf(m, ",uid=%u", root_inode->i_uid);
- if (root_inode->i_gid != 0)
- seq_printf(m, ",gid=%u", root_inode->i_gid);
+ if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, root_inode->i_uid));
+ if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, root_inode->i_gid));
seq_printf(m, ",pgrp=%d", sbi->oz_pgrp);
seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ);
seq_printf(m, ",minproto=%d", sbi->min_proto);
@@ -126,7 +128,7 @@ static const match_table_t tokens = {
{Opt_err, NULL}
};
-static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
+static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid,
pid_t *pgrp, unsigned int *type, int *minproto, int *maxproto)
{
char *p;
@@ -159,12 +161,16 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
case Opt_uid:
if (match_int(args, &option))
return 1;
- *uid = option;
+ *uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(*uid))
+ return 1;
break;
case Opt_gid:
if (match_int(args, &option))
return 1;
- *gid = option;
+ *gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(*gid))
+ return 1;
break;
case Opt_pgrp:
if (match_int(args, &option))
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 91b11650722e..c93447604da8 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -124,13 +124,10 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
* it.
*/
spin_lock(&sbi->lookup_lock);
- spin_lock(&dentry->d_lock);
- if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ if (!d_mountpoint(dentry) && simple_empty(dentry)) {
spin_unlock(&sbi->lookup_lock);
return -ENOENT;
}
- spin_unlock(&dentry->d_lock);
spin_unlock(&sbi->lookup_lock);
out:
@@ -355,7 +352,6 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
status = autofs4_mount_wait(dentry);
if (status)
return ERR_PTR(status);
- spin_lock(&sbi->fs_lock);
goto done;
}
@@ -364,8 +360,11 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
* having d_mountpoint() true, so there's no need to call back
* to the daemon.
*/
- if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))
+ if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) {
+ spin_unlock(&sbi->fs_lock);
goto done;
+ }
+
if (!d_mountpoint(dentry)) {
/*
* It's possible that user space hasn't removed directories
@@ -379,15 +378,13 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
* require user space behave.
*/
if (sbi->version > 4) {
- if (have_submounts(dentry))
+ if (have_submounts(dentry)) {
+ spin_unlock(&sbi->fs_lock);
goto done;
+ }
} else {
- spin_lock(&dentry->d_lock);
- if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ if (!simple_empty(dentry))
goto done;
- }
- spin_unlock(&dentry->d_lock);
}
ino->flags |= AUTOFS_INF_PENDING;
spin_unlock(&sbi->fs_lock);
@@ -399,28 +396,8 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
return ERR_PTR(status);
}
}
-done:
- if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
- /*
- * Any needed mounting has been completed and the path
- * updated so clear DCACHE_NEED_AUTOMOUNT so we don't
- * call ->d_automount() on rootless multi-mounts since
- * it can lead to an incorrect ELOOP error return.
- *
- * Only clear DMANAGED_AUTOMOUNT for rootless multi-mounts and
- * symlinks as in all other cases the dentry will be covered by
- * an actual mount so ->d_automount() won't be called during
- * the follow.
- */
- spin_lock(&dentry->d_lock);
- if ((!d_mountpoint(dentry) &&
- !list_empty(&dentry->d_subdirs)) ||
- (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
- __managed_dentry_clear_automount(dentry);
- spin_unlock(&dentry->d_lock);
- }
spin_unlock(&sbi->fs_lock);
-
+done:
/* Mount succeeded, check if we ended up with a new dentry */
dentry = autofs4_mountpoint_changed(path);
if (!dentry)
@@ -432,6 +409,8 @@ done:
int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
{
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+ struct autofs_info *ino = autofs4_dentry_ino(dentry);
+ int status;
DPRINTK("dentry=%p %.*s",
dentry, dentry->d_name.len, dentry->d_name.name);
@@ -456,7 +435,32 @@ int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
* This dentry may be under construction so wait on mount
* completion.
*/
- return autofs4_mount_wait(dentry);
+ status = autofs4_mount_wait(dentry);
+ if (status)
+ return status;
+
+ spin_lock(&sbi->fs_lock);
+ /*
+ * If the dentry has been selected for expire while we slept
+ * on the lock then it might go away. We'll deal with that in
+ * ->d_automount() and wait on a new mount if the expire
+ * succeeds or return here if it doesn't (since there's no
+ * mount to follow with a rootless multi-mount).
+ */
+ if (!(ino->flags & AUTOFS_INF_EXPIRING)) {
+ /*
+ * Any needed mounting has been completed and the path
+ * updated so check if this is a rootless multi-mount so
+ * we can avoid needless calls ->d_automount() and avoid
+ * an incorrect ELOOP error return.
+ */
+ if ((!d_mountpoint(dentry) && !simple_empty(dentry)) ||
+ (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
+ status = -EISDIR;
+ }
+ spin_unlock(&sbi->fs_lock);
+
+ return status;
}
/* Lookups in the root directory */
@@ -599,9 +603,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
spin_lock(&sbi->lookup_lock);
__autofs4_add_expiring(dentry);
- spin_lock(&dentry->d_lock);
- __d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ d_drop(dentry);
spin_unlock(&sbi->lookup_lock);
return 0;
@@ -672,15 +674,12 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
return -EACCES;
spin_lock(&sbi->lookup_lock);
- spin_lock(&dentry->d_lock);
- if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ if (!simple_empty(dentry)) {
spin_unlock(&sbi->lookup_lock);
return -ENOTEMPTY;
}
__autofs4_add_expiring(dentry);
- __d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ d_drop(dentry);
spin_unlock(&sbi->lookup_lock);
if (sbi->version < 5)
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index dce436e595c1..03bc1d347d8e 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -154,6 +154,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
case autofs_ptype_expire_direct:
{
struct autofs_v5_packet *packet = &pkt.v5_pkt.v5_packet;
+ struct user_namespace *user_ns = sbi->pipe->f_cred->user_ns;
pktsz = sizeof(*packet);
@@ -163,8 +164,8 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
packet->name[wq->name.len] = '\0';
packet->dev = wq->dev;
packet->ino = wq->ino;
- packet->uid = wq->uid;
- packet->gid = wq->gid;
+ packet->uid = from_kuid_munged(user_ns, wq->uid);
+ packet->gid = from_kgid_munged(user_ns, wq->gid);
packet->pid = wq->pid;
packet->tgid = wq->tgid;
break;
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index b1342ffb3cf6..922ad460bff9 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -16,7 +16,7 @@
#include <linux/poll.h>
-static loff_t bad_file_llseek(struct file *file, loff_t offset, int origin)
+static loff_t bad_file_llseek(struct file *file, loff_t offset, int whence)
{
return -EIO;
}
diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index f20e8a71062f..ad3ea1497cc3 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -161,6 +161,14 @@ static int bfs_readpage(struct file *file, struct page *page)
return block_read_full_page(page, bfs_get_block);
}
+static void bfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size)
+ truncate_pagecache(inode, to, inode->i_size);
+}
+
static int bfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -169,11 +177,8 @@ static int bfs_write_begin(struct file *file, struct address_space *mapping,
ret = block_write_begin(mapping, pos, len, flags, pagep,
bfs_get_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ bfs_write_failed(mapping, pos + len);
return ret;
}
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 0e7a6f81ae36..6043567b95c2 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -30,7 +30,7 @@
#include <asm/cacheflush.h>
#include <asm/a.out-core.h>
-static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs);
+static int load_aout_binary(struct linux_binprm *);
static int load_aout_library(struct file*);
#ifdef CONFIG_COREDUMP
@@ -201,8 +201,9 @@ static unsigned long __user *create_aout_tables(char __user *p, struct linux_bin
* libraries. There is no binary dependent code anywhere else.
*/
-static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+static int load_aout_binary(struct linux_binprm * bprm)
{
+ struct pt_regs *regs = current_pt_regs();
struct exec ex;
unsigned long error;
unsigned long fd_offset;
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index fbd9f60bd763..0c42cdbabecf 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -44,7 +44,7 @@
#define user_siginfo_t siginfo_t
#endif
-static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
+static int load_elf_binary(struct linux_binprm *bprm);
static int load_elf_library(struct file *);
static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *,
int, int, unsigned long);
@@ -558,7 +558,7 @@ static unsigned long randomize_stack_top(unsigned long stack_top)
#endif
}
-static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_elf_binary(struct linux_binprm *bprm)
{
struct file *interpreter = NULL; /* to shut gcc up */
unsigned long load_addr = 0, load_bias = 0;
@@ -575,6 +575,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
unsigned long reloc_func_desc __maybe_unused = 0;
int executable_stack = EXSTACK_DEFAULT;
unsigned long def_flags = 0;
+ struct pt_regs *regs = current_pt_regs();
struct {
struct elfhdr elf_ex;
struct elfhdr interp_elf_ex;
@@ -1600,8 +1601,10 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
info->thread = NULL;
psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
- if (psinfo == NULL)
+ if (psinfo == NULL) {
+ info->psinfo.data = NULL; /* So we don't free this wrongly */
return 0;
+ }
fill_note(&info->psinfo, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index a46049154107..dc84732e554f 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -56,7 +56,7 @@ typedef char *elf_caddr_t;
MODULE_LICENSE("GPL");
-static int load_elf_fdpic_binary(struct linux_binprm *, struct pt_regs *);
+static int load_elf_fdpic_binary(struct linux_binprm *);
static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *);
static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *,
struct mm_struct *, const char *);
@@ -164,10 +164,10 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params,
/*
* load an fdpic binary into various bits of memory
*/
-static int load_elf_fdpic_binary(struct linux_binprm *bprm,
- struct pt_regs *regs)
+static int load_elf_fdpic_binary(struct linux_binprm *bprm)
{
struct elf_fdpic_params exec_params, interp_params;
+ struct pt_regs *regs = current_pt_regs();
struct elf_phdr *phdr;
unsigned long stack_size, entryaddr;
#ifdef ELF_FDPIC_PLAT_INIT
diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c
index 2790c7e1912e..037a3e2b045b 100644
--- a/fs/binfmt_em86.c
+++ b/fs/binfmt_em86.c
@@ -22,7 +22,7 @@
#define EM86_INTERP "/usr/bin/em86"
#define EM86_I_NAME "em86"
-static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs)
+static int load_em86(struct linux_binprm *bprm)
{
char *interp, *i_name, *i_arg;
struct file * file;
@@ -42,7 +42,6 @@ static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs)
return -ENOEXEC;
}
- bprm->recursion_depth++; /* Well, the bang-shell is implicit... */
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
@@ -90,7 +89,7 @@ static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs)
if (retval < 0)
return retval;
- return search_binary_handler(bprm, regs);
+ return search_binary_handler(bprm);
}
static struct linux_binfmt em86_format = {
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index e280352b28f9..b56371981d16 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -88,7 +88,7 @@ struct lib_info {
static int load_flat_shared_library(int id, struct lib_info *p);
#endif
-static int load_flat_binary(struct linux_binprm *, struct pt_regs * regs);
+static int load_flat_binary(struct linux_binprm *);
static int flat_core_dump(struct coredump_params *cprm);
static struct linux_binfmt flat_format = {
@@ -858,9 +858,10 @@ out:
* libraries. There is no binary dependent code anywhere else.
*/
-static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+static int load_flat_binary(struct linux_binprm * bprm)
{
struct lib_info libinfo;
+ struct pt_regs *regs = current_pt_regs();
unsigned long p = bprm->p;
unsigned long stack_len;
unsigned long start_addr;
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 790b3cddca67..0c8869fdd14e 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -104,7 +104,7 @@ static Node *check_file(struct linux_binprm *bprm)
/*
* the loader itself
*/
-static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_misc_binary(struct linux_binprm *bprm)
{
Node *fmt;
struct file * interp_file = NULL;
@@ -117,10 +117,6 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
if (!enabled)
goto _ret;
- retval = -ENOEXEC;
- if (bprm->recursion_depth > BINPRM_MAX_RECURSION)
- goto _ret;
-
/* to keep locking time low, we copy the interpreter string */
read_lock(&entries_lock);
fmt = check_file(bprm);
@@ -176,7 +172,10 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
goto _error;
bprm->argc ++;
- bprm->interp = iname; /* for binfmt_script */
+ /* Update interp in case binfmt_script needs it. */
+ retval = bprm_change_interp(iname, bprm);
+ if (retval < 0)
+ goto _error;
interp_file = open_exec (iname);
retval = PTR_ERR (interp_file);
@@ -197,9 +196,7 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
if (retval < 0)
goto _error;
- bprm->recursion_depth++;
-
- retval = search_binary_handler (bprm, regs);
+ retval = search_binary_handler(bprm);
if (retval < 0)
goto _error;
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index d3b8c1f63155..5027a3e14922 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -14,7 +14,7 @@
#include <linux/err.h>
#include <linux/fs.h>
-static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
+static int load_script(struct linux_binprm *bprm)
{
const char *i_arg, *i_name;
char *cp;
@@ -22,15 +22,13 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
char interp[BINPRM_BUF_SIZE];
int retval;
- if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!') ||
- (bprm->recursion_depth > BINPRM_MAX_RECURSION))
+ if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!'))
return -ENOEXEC;
/*
* This section does the #! interpretation.
* Sorta complicated, but hopefully it will work. -TYT
*/
- bprm->recursion_depth++;
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
@@ -82,7 +80,9 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
retval = copy_strings_kernel(1, &i_name, bprm);
if (retval) return retval;
bprm->argc++;
- bprm->interp = interp;
+ retval = bprm_change_interp(interp, bprm);
+ if (retval < 0)
+ return retval;
/*
* OK, now restart the process with the interpreter's dentry.
@@ -95,7 +95,7 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
retval = prepare_binprm(bprm);
if (retval < 0)
return retval;
- return search_binary_handler(bprm,regs);
+ return search_binary_handler(bprm);
}
static struct linux_binfmt script_format = {
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index 4517aaff61b4..4e00ed68d4a6 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -35,7 +35,7 @@
#include <linux/elf.h>
-static int load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs);
+static int load_som_binary(struct linux_binprm * bprm);
static int load_som_library(struct file *);
/*
@@ -180,13 +180,14 @@ out:
*/
static int
-load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+load_som_binary(struct linux_binprm * bprm)
{
int retval;
unsigned int size;
unsigned long som_entry;
struct som_hdr *som_ex;
struct som_exec_auxhdr *hpuxhdr;
+ struct pt_regs *regs = current_pt_regs();
/* Get the exec-header */
som_ex = (struct som_hdr *) bprm->buf;
diff --git a/fs/bio.c b/fs/bio.c
index 9298c65ad9c7..b96fc6ce4855 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -75,6 +75,7 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size)
unsigned int sz = sizeof(struct bio) + extra_size;
struct kmem_cache *slab = NULL;
struct bio_slab *bslab, *new_bio_slabs;
+ unsigned int new_bio_slab_max;
unsigned int i, entry = -1;
mutex_lock(&bio_slab_lock);
@@ -97,12 +98,13 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size)
goto out_unlock;
if (bio_slab_nr == bio_slab_max && entry == -1) {
- bio_slab_max <<= 1;
+ new_bio_slab_max = bio_slab_max << 1;
new_bio_slabs = krealloc(bio_slabs,
- bio_slab_max * sizeof(struct bio_slab),
+ new_bio_slab_max * sizeof(struct bio_slab),
GFP_KERNEL);
if (!new_bio_slabs)
goto out_unlock;
+ bio_slab_max = new_bio_slab_max;
bio_slabs = new_bio_slabs;
}
if (entry == -1)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index b3c1d3dae77d..172f8491a2bd 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -70,19 +70,6 @@ static void bdev_inode_switch_bdi(struct inode *inode,
spin_unlock(&dst->wb.list_lock);
}
-sector_t blkdev_max_block(struct block_device *bdev)
-{
- sector_t retval = ~((sector_t)0);
- loff_t sz = i_size_read(bdev->bd_inode);
-
- if (sz) {
- unsigned int size = block_size(bdev);
- unsigned int sizebits = blksize_bits(size);
- retval = (sz >> sizebits);
- }
- return retval;
-}
-
/* Kill _all_ buffers and pagecache , dirty or not.. */
void kill_bdev(struct block_device *bdev)
{
@@ -116,8 +103,6 @@ EXPORT_SYMBOL(invalidate_bdev);
int set_blocksize(struct block_device *bdev, int size)
{
- struct address_space *mapping;
-
/* Size must be a power of two, and between 512 and PAGE_SIZE */
if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size))
return -EINVAL;
@@ -126,19 +111,6 @@ int set_blocksize(struct block_device *bdev, int size)
if (size < bdev_logical_block_size(bdev))
return -EINVAL;
- /* Prevent starting I/O or mapping the device */
- percpu_down_write(&bdev->bd_block_size_semaphore);
-
- /* Check that the block device is not memory mapped */
- mapping = bdev->bd_inode->i_mapping;
- mutex_lock(&mapping->i_mmap_mutex);
- if (mapping_mapped(mapping)) {
- mutex_unlock(&mapping->i_mmap_mutex);
- percpu_up_write(&bdev->bd_block_size_semaphore);
- return -EBUSY;
- }
- mutex_unlock(&mapping->i_mmap_mutex);
-
/* Don't change the size if it is same as current */
if (bdev->bd_block_size != size) {
sync_blockdev(bdev);
@@ -146,9 +118,6 @@ int set_blocksize(struct block_device *bdev, int size)
bdev->bd_inode->i_blkbits = blksize_bits(size);
kill_bdev(bdev);
}
-
- percpu_up_write(&bdev->bd_block_size_semaphore);
-
return 0;
}
@@ -181,52 +150,12 @@ static int
blkdev_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh, int create)
{
- if (iblock >= blkdev_max_block(I_BDEV(inode))) {
- if (create)
- return -EIO;
-
- /*
- * for reads, we're just trying to fill a partial page.
- * return a hole, they will have to call get_block again
- * before they can fill it, and they will get -EIO at that
- * time
- */
- return 0;
- }
bh->b_bdev = I_BDEV(inode);
bh->b_blocknr = iblock;
set_buffer_mapped(bh);
return 0;
}
-static int
-blkdev_get_blocks(struct inode *inode, sector_t iblock,
- struct buffer_head *bh, int create)
-{
- sector_t end_block = blkdev_max_block(I_BDEV(inode));
- unsigned long max_blocks = bh->b_size >> inode->i_blkbits;
-
- if ((iblock + max_blocks) > end_block) {
- max_blocks = end_block - iblock;
- if ((long)max_blocks <= 0) {
- if (create)
- return -EIO; /* write fully beyond EOF */
- /*
- * It is a read which is fully beyond EOF. We return
- * a !buffer_mapped buffer
- */
- max_blocks = 0;
- }
- }
-
- bh->b_bdev = I_BDEV(inode);
- bh->b_blocknr = iblock;
- bh->b_size = max_blocks << inode->i_blkbits;
- if (max_blocks)
- set_buffer_mapped(bh);
- return 0;
-}
-
static ssize_t
blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t offset, unsigned long nr_segs)
@@ -235,7 +164,7 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
struct inode *inode = file->f_mapping->host;
return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iov, offset,
- nr_segs, blkdev_get_blocks, NULL, NULL, 0);
+ nr_segs, blkdev_get_block, NULL, NULL, 0);
}
int __sync_blockdev(struct block_device *bdev, int wait)
@@ -392,7 +321,7 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping,
* for a block special file file->f_path.dentry->d_inode->i_size is zero
* so we compute the size by hand (just as in block_read/write above)
*/
-static loff_t block_llseek(struct file *file, loff_t offset, int origin)
+static loff_t block_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *bd_inode = file->f_mapping->host;
loff_t size;
@@ -402,7 +331,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
size = i_size_read(bd_inode);
retval = -EINVAL;
- switch (origin) {
+ switch (whence) {
case SEEK_END:
offset += size;
break;
@@ -459,12 +388,6 @@ static struct inode *bdev_alloc_inode(struct super_block *sb)
struct bdev_inode *ei = kmem_cache_alloc(bdev_cachep, GFP_KERNEL);
if (!ei)
return NULL;
-
- if (unlikely(percpu_init_rwsem(&ei->bdev.bd_block_size_semaphore))) {
- kmem_cache_free(bdev_cachep, ei);
- return NULL;
- }
-
return &ei->vfs_inode;
}
@@ -473,8 +396,6 @@ static void bdev_i_callback(struct rcu_head *head)
struct inode *inode = container_of(head, struct inode, i_rcu);
struct bdev_inode *bdi = BDEV_I(inode);
- percpu_free_rwsem(&bdi->bdev.bd_block_size_semaphore);
-
kmem_cache_free(bdev_cachep, bdi);
}
@@ -1593,22 +1514,6 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return blkdev_ioctl(bdev, mode, cmd, arg);
}
-ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
-{
- ssize_t ret;
- struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
- ret = generic_file_aio_read(iocb, iov, nr_segs, pos);
-
- percpu_up_read(&bdev->bd_block_size_semaphore);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(blkdev_aio_read);
-
/*
* Write data to the block device. Only intended for the block device itself
* and the raw driver which basically is a fake block device.
@@ -1620,16 +1525,12 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file *file = iocb->ki_filp;
- struct block_device *bdev = I_BDEV(file->f_mapping->host);
struct blk_plug plug;
ssize_t ret;
BUG_ON(iocb->ki_pos != pos);
blk_start_plug(&plug);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
if (ret > 0 || ret == -EIOCBQUEUED) {
ssize_t err;
@@ -1638,27 +1539,25 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (err < 0 && ret > 0)
ret = err;
}
-
- percpu_up_read(&bdev->bd_block_size_semaphore);
-
blk_finish_plug(&plug);
-
return ret;
}
EXPORT_SYMBOL_GPL(blkdev_aio_write);
-static int blkdev_mmap(struct file *file, struct vm_area_struct *vma)
+static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
{
- int ret;
- struct block_device *bdev = I_BDEV(file->f_mapping->host);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
- ret = generic_file_mmap(file, vma);
+ struct file *file = iocb->ki_filp;
+ struct inode *bd_inode = file->f_mapping->host;
+ loff_t size = i_size_read(bd_inode);
- percpu_up_read(&bdev->bd_block_size_semaphore);
+ if (pos >= size)
+ return 0;
- return ret;
+ size -= pos;
+ if (size < INT_MAX)
+ nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
+ return generic_file_aio_read(iocb, iov, nr_segs, pos);
}
/*
@@ -1691,9 +1590,9 @@ const struct file_operations def_blk_fops = {
.llseek = block_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .aio_read = blkdev_aio_read,
+ .aio_read = blkdev_aio_read,
.aio_write = blkdev_aio_write,
- .mmap = blkdev_mmap,
+ .mmap = generic_file_mmap,
.fsync = blkdev_fsync,
.unlocked_ioctl = block_ioctl,
#ifdef CONFIG_COMPAT
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index d7fcdba141a2..7df3e0f0ee51 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -8,7 +8,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \
export.o tree-log.o free-space-cache.o zlib.o lzo.o \
compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
- reada.o backref.o ulist.o qgroup.o send.o
+ reada.o backref.o ulist.o qgroup.o send.o dev-replace.o
btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 0c16e3dbfd56..e15d2b0d8d3b 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -121,6 +121,8 @@ static int btrfs_set_acl(struct btrfs_trans_handle *trans,
ret = posix_acl_equiv_mode(acl, &inode->i_mode);
if (ret < 0)
return ret;
+ if (ret == 0)
+ acl = NULL;
}
ret = 0;
break;
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 208d8aa5b07e..04edf69be875 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -461,6 +461,7 @@ static int __merge_refs(struct list_head *head, int mode)
pos2 = n2, n2 = pos2->next) {
struct __prelim_ref *ref2;
struct __prelim_ref *xchg;
+ struct extent_inode_elem *eie;
ref2 = list_entry(pos2, struct __prelim_ref, list);
@@ -472,12 +473,20 @@ static int __merge_refs(struct list_head *head, int mode)
ref1 = ref2;
ref2 = xchg;
}
- ref1->count += ref2->count;
} else {
if (ref1->parent != ref2->parent)
continue;
- ref1->count += ref2->count;
}
+
+ eie = ref1->inode_list;
+ while (eie && eie->next)
+ eie = eie->next;
+ if (eie)
+ eie->next = ref2->inode_list;
+ else
+ ref1->inode_list = ref2->inode_list;
+ ref1->count += ref2->count;
+
list_del(&ref2->list);
kfree(ref2);
}
@@ -890,8 +899,7 @@ again:
while (!list_empty(&prefs)) {
ref = list_first_entry(&prefs, struct __prelim_ref, list);
list_del(&ref->list);
- if (ref->count < 0)
- WARN_ON(1);
+ WARN_ON(ref->count < 0);
if (ref->count && ref->root_id && ref->parent == 0) {
/* no parent == root of tree */
ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS);
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index ed8ca7ca5eff..2a8c242bc4f5 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -39,6 +39,7 @@
#define BTRFS_INODE_HAS_ORPHAN_ITEM 5
#define BTRFS_INODE_HAS_ASYNC_EXTENT 6
#define BTRFS_INODE_NEEDS_FULL_SYNC 7
+#define BTRFS_INODE_COPY_EVERYTHING 8
/* in memory btrfs inode */
struct btrfs_inode {
@@ -90,6 +91,9 @@ struct btrfs_inode {
unsigned long runtime_flags;
+ /* Keep track of who's O_SYNC/fsycing currently */
+ atomic_t sync_writers;
+
/* full 64 bit generation number, struct vfs_inode doesn't have a big
* enough field for this.
*/
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 5a3e45db642a..11d47bfb62b4 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -137,7 +137,7 @@ struct btrfsic_block {
unsigned int never_written:1; /* block was added because it was
* referenced, not because it was
* written */
- unsigned int mirror_num:2; /* large enough to hold
+ unsigned int mirror_num; /* large enough to hold
* BTRFS_SUPER_MIRROR_MAX */
struct btrfsic_dev_state *dev_state;
u64 dev_bytenr; /* key, physical byte num on disk */
@@ -723,7 +723,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
}
num_copies =
- btrfs_num_copies(&state->root->fs_info->mapping_tree,
+ btrfs_num_copies(state->root->fs_info,
next_bytenr, state->metablock_size);
if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -903,7 +903,7 @@ static int btrfsic_process_superblock_dev_mirror(
}
num_copies =
- btrfs_num_copies(&state->root->fs_info->mapping_tree,
+ btrfs_num_copies(state->root->fs_info,
next_bytenr, state->metablock_size);
if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -1287,7 +1287,7 @@ static int btrfsic_create_link_to_next_block(
*next_blockp = NULL;
if (0 == *num_copiesp) {
*num_copiesp =
- btrfs_num_copies(&state->root->fs_info->mapping_tree,
+ btrfs_num_copies(state->root->fs_info,
next_bytenr, state->metablock_size);
if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -1489,7 +1489,7 @@ static int btrfsic_handle_extent_data(
chunk_len = num_bytes;
num_copies =
- btrfs_num_copies(&state->root->fs_info->mapping_tree,
+ btrfs_num_copies(state->root->fs_info,
next_bytenr, state->datablock_size);
if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -1582,9 +1582,21 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
struct btrfs_device *device;
length = len;
- ret = btrfs_map_block(&state->root->fs_info->mapping_tree, READ,
+ ret = btrfs_map_block(state->root->fs_info, READ,
bytenr, &length, &multi, mirror_num);
+ if (ret) {
+ block_ctx_out->start = 0;
+ block_ctx_out->dev_bytenr = 0;
+ block_ctx_out->len = 0;
+ block_ctx_out->dev = NULL;
+ block_ctx_out->datav = NULL;
+ block_ctx_out->pagev = NULL;
+ block_ctx_out->mem_to_free = NULL;
+
+ return ret;
+ }
+
device = multi->stripes[0].dev;
block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev);
block_ctx_out->dev_bytenr = multi->stripes[0].physical;
@@ -1594,8 +1606,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
block_ctx_out->pagev = NULL;
block_ctx_out->mem_to_free = NULL;
- if (0 == ret)
- kfree(multi);
+ kfree(multi);
if (NULL == block_ctx_out->dev) {
ret = -ENXIO;
printk(KERN_INFO "btrfsic: error, cannot lookup dev (#1)!\n");
@@ -2463,7 +2474,7 @@ static int btrfsic_process_written_superblock(
}
num_copies =
- btrfs_num_copies(&state->root->fs_info->mapping_tree,
+ btrfs_num_copies(state->root->fs_info,
next_bytenr, BTRFS_SUPER_INFO_SIZE);
if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -2960,7 +2971,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
struct btrfsic_block_data_ctx block_ctx;
int match = 0;
- num_copies = btrfs_num_copies(&state->root->fs_info->mapping_tree,
+ num_copies = btrfs_num_copies(state->root->fs_info,
bytenr, state->metablock_size);
for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index c6467aa88bee..94ab2f80e7e3 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -687,7 +687,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
ret = btrfs_map_bio(root, READ, comp_bio,
mirror_num, 0);
- BUG_ON(ret); /* -ENOMEM */
+ if (ret)
+ bio_endio(comp_bio, ret);
bio_put(comp_bio);
@@ -712,7 +713,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
}
ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0);
- BUG_ON(ret); /* -ENOMEM */
+ if (ret)
+ bio_endio(comp_bio, ret);
bio_put(comp_bio);
return 0;
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index cdfb4c49a806..eea5da7a2b9a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -38,8 +38,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
struct extent_buffer *dst_buf,
struct extent_buffer *src_buf);
static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- struct btrfs_path *path, int level, int slot,
- int tree_mod_log);
+ struct btrfs_path *path, int level, int slot);
static void tree_mod_log_free_eb(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb);
struct extent_buffer *read_old_tree_block(struct btrfs_root *root, u64 bytenr,
@@ -776,8 +775,7 @@ tree_mod_log_eb_move(struct btrfs_fs_info *fs_info, struct extent_buffer *dst,
static noinline void
tree_mod_log_set_node_key(struct btrfs_fs_info *fs_info,
- struct extent_buffer *eb,
- struct btrfs_disk_key *disk_key, int slot, int atomic)
+ struct extent_buffer *eb, int slot, int atomic)
{
int ret;
@@ -1361,19 +1359,16 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans,
u64 search_start;
int ret;
- if (trans->transaction != root->fs_info->running_transaction) {
- printk(KERN_CRIT "trans %llu running %llu\n",
+ if (trans->transaction != root->fs_info->running_transaction)
+ WARN(1, KERN_CRIT "trans %llu running %llu\n",
(unsigned long long)trans->transid,
(unsigned long long)
root->fs_info->running_transaction->transid);
- WARN_ON(1);
- }
- if (trans->transid != root->fs_info->generation) {
- printk(KERN_CRIT "trans %llu running %llu\n",
+
+ if (trans->transid != root->fs_info->generation)
+ WARN(1, KERN_CRIT "trans %llu running %llu\n",
(unsigned long long)trans->transid,
(unsigned long long)root->fs_info->generation);
- WARN_ON(1);
- }
if (!should_cow_block(trans, root, buf)) {
*cow_ret = buf;
@@ -1469,10 +1464,8 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
if (cache_only && parent_level != 1)
return 0;
- if (trans->transaction != root->fs_info->running_transaction)
- WARN_ON(1);
- if (trans->transid != root->fs_info->generation)
- WARN_ON(1);
+ WARN_ON(trans->transaction != root->fs_info->running_transaction);
+ WARN_ON(trans->transid != root->fs_info->generation);
parent_nritems = btrfs_header_nritems(parent);
blocksize = btrfs_level_size(root, parent_level - 1);
@@ -1827,7 +1820,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
if (btrfs_header_nritems(right) == 0) {
clean_tree_block(trans, root, right);
btrfs_tree_unlock(right);
- del_ptr(trans, root, path, level + 1, pslot + 1, 1);
+ del_ptr(trans, root, path, level + 1, pslot + 1);
root_sub_used(root, right->len);
btrfs_free_tree_block(trans, root, right, 0, 1);
free_extent_buffer_stale(right);
@@ -1836,7 +1829,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
struct btrfs_disk_key right_key;
btrfs_node_key(right, &right_key, 0);
tree_mod_log_set_node_key(root->fs_info, parent,
- &right_key, pslot + 1, 0);
+ pslot + 1, 0);
btrfs_set_node_key(parent, &right_key, pslot + 1);
btrfs_mark_buffer_dirty(parent);
}
@@ -1871,7 +1864,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
if (btrfs_header_nritems(mid) == 0) {
clean_tree_block(trans, root, mid);
btrfs_tree_unlock(mid);
- del_ptr(trans, root, path, level + 1, pslot, 1);
+ del_ptr(trans, root, path, level + 1, pslot);
root_sub_used(root, mid->len);
btrfs_free_tree_block(trans, root, mid, 0, 1);
free_extent_buffer_stale(mid);
@@ -1880,7 +1873,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
/* update the parent key to reflect our changes */
struct btrfs_disk_key mid_key;
btrfs_node_key(mid, &mid_key, 0);
- tree_mod_log_set_node_key(root->fs_info, parent, &mid_key,
+ tree_mod_log_set_node_key(root->fs_info, parent,
pslot, 0);
btrfs_set_node_key(parent, &mid_key, pslot);
btrfs_mark_buffer_dirty(parent);
@@ -1980,7 +1973,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
orig_slot += left_nr;
btrfs_node_key(mid, &disk_key, 0);
tree_mod_log_set_node_key(root->fs_info, parent,
- &disk_key, pslot, 0);
+ pslot, 0);
btrfs_set_node_key(parent, &disk_key, pslot);
btrfs_mark_buffer_dirty(parent);
if (btrfs_header_nritems(left) > orig_slot) {
@@ -2033,7 +2026,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
btrfs_node_key(right, &disk_key, 0);
tree_mod_log_set_node_key(root->fs_info, parent,
- &disk_key, pslot + 1, 0);
+ pslot + 1, 0);
btrfs_set_node_key(parent, &disk_key, pslot + 1);
btrfs_mark_buffer_dirty(parent);
@@ -2219,6 +2212,9 @@ static noinline void unlock_up(struct btrfs_path *path, int level,
int no_skips = 0;
struct extent_buffer *t;
+ if (path->really_keep_locks)
+ return;
+
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
if (!path->nodes[i])
break;
@@ -2266,7 +2262,7 @@ noinline void btrfs_unlock_up_safe(struct btrfs_path *path, int level)
{
int i;
- if (path->keep_locks)
+ if (path->keep_locks || path->really_keep_locks)
return;
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
@@ -2499,7 +2495,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
if (!cow)
write_lock_level = -1;
- if (cow && (p->keep_locks || p->lowest_level))
+ if (cow && (p->really_keep_locks || p->keep_locks || p->lowest_level))
write_lock_level = BTRFS_MAX_LEVEL;
min_write_lock_level = write_lock_level;
@@ -2568,7 +2564,10 @@ again:
* must have write locks on this node and the
* parent
*/
- if (level + 1 > write_lock_level) {
+ if (level > write_lock_level ||
+ (level + 1 > write_lock_level &&
+ level + 1 < BTRFS_MAX_LEVEL &&
+ p->nodes[level + 1])) {
write_lock_level = level + 1;
btrfs_release_path(p);
goto again;
@@ -2917,7 +2916,7 @@ static void fixup_low_keys(struct btrfs_trans_handle *trans,
if (!path->nodes[i])
break;
t = path->nodes[i];
- tree_mod_log_set_node_key(root->fs_info, t, key, tslot, 1);
+ tree_mod_log_set_node_key(root->fs_info, t, tslot, 1);
btrfs_set_node_key(t, key, tslot);
btrfs_mark_buffer_dirty(path->nodes[i]);
if (tslot != 0)
@@ -3302,14 +3301,21 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
*/
static int leaf_space_used(struct extent_buffer *l, int start, int nr)
{
+ struct btrfs_item *start_item;
+ struct btrfs_item *end_item;
+ struct btrfs_map_token token;
int data_len;
int nritems = btrfs_header_nritems(l);
int end = min(nritems, start + nr) - 1;
if (!nr)
return 0;
- data_len = btrfs_item_end_nr(l, start);
- data_len = data_len - btrfs_item_offset_nr(l, end);
+ btrfs_init_map_token(&token);
+ start_item = btrfs_item_nr(l, start);
+ end_item = btrfs_item_nr(l, end);
+ data_len = btrfs_token_item_offset(l, start_item, &token) +
+ btrfs_token_item_size(l, start_item, &token);
+ data_len = data_len - btrfs_token_item_offset(l, end_item, &token);
data_len += sizeof(struct btrfs_item) * nr;
WARN_ON(data_len < 0);
return data_len;
@@ -3403,8 +3409,7 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
if (push_items == 0)
goto out_unlock;
- if (!empty && push_items == left_nritems)
- WARN_ON(1);
+ WARN_ON(!empty && push_items == left_nritems);
/* push left to right */
right_nritems = btrfs_header_nritems(right);
@@ -3642,11 +3647,9 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
btrfs_set_header_nritems(left, old_left_nritems + push_items);
/* fixup right node */
- if (push_items > right_nritems) {
- printk(KERN_CRIT "push items %d nr %u\n", push_items,
+ if (push_items > right_nritems)
+ WARN(1, KERN_CRIT "push items %d nr %u\n", push_items,
right_nritems);
- WARN_ON(1);
- }
if (push_items < right_nritems) {
push_space = btrfs_item_offset_nr(right, push_items - 1) -
@@ -4602,8 +4605,7 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
* empty a node.
*/
static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- struct btrfs_path *path, int level, int slot,
- int tree_mod_log)
+ struct btrfs_path *path, int level, int slot)
{
struct extent_buffer *parent = path->nodes[level];
u32 nritems;
@@ -4611,7 +4613,7 @@ static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
nritems = btrfs_header_nritems(parent);
if (slot != nritems - 1) {
- if (tree_mod_log && level)
+ if (level)
tree_mod_log_eb_move(root->fs_info, parent, slot,
slot + 1, nritems - slot - 1);
memmove_extent_buffer(parent,
@@ -4619,7 +4621,7 @@ static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
btrfs_node_key_ptr_offset(slot + 1),
sizeof(struct btrfs_key_ptr) *
(nritems - slot - 1));
- } else if (tree_mod_log && level) {
+ } else if (level) {
ret = tree_mod_log_insert_key(root->fs_info, parent, slot,
MOD_LOG_KEY_REMOVE);
BUG_ON(ret < 0);
@@ -4656,7 +4658,7 @@ static noinline void btrfs_del_leaf(struct btrfs_trans_handle *trans,
struct extent_buffer *leaf)
{
WARN_ON(btrfs_header_generation(leaf) != trans->transid);
- del_ptr(trans, root, path, 1, path->slots[1], 1);
+ del_ptr(trans, root, path, 1, path->slots[1]);
/*
* btrfs_free_extent is expensive, we want to make sure we
@@ -5123,13 +5125,13 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
right_path->search_commit_root = 1;
right_path->skip_locking = 1;
- spin_lock(&left_root->root_times_lock);
+ spin_lock(&left_root->root_item_lock);
left_start_ctransid = btrfs_root_ctransid(&left_root->root_item);
- spin_unlock(&left_root->root_times_lock);
+ spin_unlock(&left_root->root_item_lock);
- spin_lock(&right_root->root_times_lock);
+ spin_lock(&right_root->root_item_lock);
right_start_ctransid = btrfs_root_ctransid(&right_root->root_item);
- spin_unlock(&right_root->root_times_lock);
+ spin_unlock(&right_root->root_item_lock);
trans = btrfs_join_transaction(left_root);
if (IS_ERR(trans)) {
@@ -5224,15 +5226,15 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
goto out;
}
- spin_lock(&left_root->root_times_lock);
+ spin_lock(&left_root->root_item_lock);
ctransid = btrfs_root_ctransid(&left_root->root_item);
- spin_unlock(&left_root->root_times_lock);
+ spin_unlock(&left_root->root_item_lock);
if (ctransid != left_start_ctransid)
left_start_ctransid = 0;
- spin_lock(&right_root->root_times_lock);
+ spin_lock(&right_root->root_item_lock);
ctransid = btrfs_root_ctransid(&right_root->root_item);
- spin_unlock(&right_root->root_times_lock);
+ spin_unlock(&right_root->root_item_lock);
if (ctransid != right_start_ctransid)
right_start_ctransid = 0;
@@ -5496,6 +5498,139 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path)
return btrfs_next_old_leaf(root, path, 0);
}
+/* Release the path up to but not including the given level */
+static void btrfs_release_level(struct btrfs_path *path, int level)
+{
+ int i;
+
+ for (i = 0; i < level; i++) {
+ path->slots[i] = 0;
+ if (!path->nodes[i])
+ continue;
+ if (path->locks[i]) {
+ btrfs_tree_unlock_rw(path->nodes[i], path->locks[i]);
+ path->locks[i] = 0;
+ }
+ free_extent_buffer(path->nodes[i]);
+ path->nodes[i] = NULL;
+ }
+}
+
+/*
+ * This function assumes 2 things
+ *
+ * 1) You are using path->keep_locks
+ * 2) You are not inserting items.
+ *
+ * If either of these are not true do not use this function. If you need a next
+ * leaf with either of these not being true then this function can be easily
+ * adapted to do that, but at the moment these are the limitations.
+ */
+int btrfs_next_leaf_write(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_path *path,
+ int del)
+{
+ struct extent_buffer *b;
+ struct btrfs_key key;
+ u32 nritems;
+ int level = 1;
+ int slot;
+ int ret = 1;
+ int write_lock_level = BTRFS_MAX_LEVEL;
+ int ins_len = del ? -1 : 0;
+
+ WARN_ON(!(path->keep_locks || path->really_keep_locks));
+
+ nritems = btrfs_header_nritems(path->nodes[0]);
+ btrfs_item_key_to_cpu(path->nodes[0], &key, nritems - 1);
+
+ while (path->nodes[level]) {
+ nritems = btrfs_header_nritems(path->nodes[level]);
+ if (!(path->locks[level] & BTRFS_WRITE_LOCK)) {
+search:
+ btrfs_release_path(path);
+ ret = btrfs_search_slot(trans, root, &key, path,
+ ins_len, 1);
+ if (ret < 0)
+ goto out;
+ level = 1;
+ continue;
+ }
+
+ if (path->slots[level] >= nritems - 1) {
+ level++;
+ continue;
+ }
+
+ btrfs_release_level(path, level);
+ break;
+ }
+
+ if (!path->nodes[level]) {
+ ret = 1;
+ goto out;
+ }
+
+ path->slots[level]++;
+ b = path->nodes[level];
+
+ while (b) {
+ level = btrfs_header_level(b);
+
+ if (!should_cow_block(trans, root, b))
+ goto cow_done;
+
+ btrfs_set_path_blocking(path);
+ ret = btrfs_cow_block(trans, root, b,
+ path->nodes[level + 1],
+ path->slots[level + 1], &b);
+ if (ret)
+ goto out;
+cow_done:
+ path->nodes[level] = b;
+ btrfs_clear_path_blocking(path, NULL, 0);
+ if (level != 0) {
+ ret = setup_nodes_for_search(trans, root, path, b,
+ level, ins_len,
+ &write_lock_level);
+ if (ret == -EAGAIN)
+ goto search;
+ if (ret)
+ goto out;
+
+ b = path->nodes[level];
+ slot = path->slots[level];
+
+ ret = read_block_for_search(trans, root, path,
+ &b, level, slot, &key, 0);
+ if (ret == -EAGAIN)
+ goto search;
+ if (ret)
+ goto out;
+ level = btrfs_header_level(b);
+ if (!btrfs_try_tree_write_lock(b)) {
+ btrfs_set_path_blocking(path);
+ btrfs_tree_lock(b);
+ btrfs_clear_path_blocking(path, b,
+ BTRFS_WRITE_LOCK);
+ }
+ path->locks[level] = BTRFS_WRITE_LOCK;
+ path->nodes[level] = b;
+ path->slots[level] = 0;
+ } else {
+ path->slots[level] = 0;
+ ret = 0;
+ break;
+ }
+ }
+
+out:
+ if (ret)
+ btrfs_release_path(path);
+
+ return ret;
+}
+
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
u64 time_seq)
{
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 596617ecd329..547b7b05727f 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -48,7 +48,7 @@ struct btrfs_ordered_sum;
#define BTRFS_MAGIC "_BHRfS_M"
-#define BTRFS_MAX_MIRRORS 2
+#define BTRFS_MAX_MIRRORS 3
#define BTRFS_MAX_LEVEL 8
@@ -142,6 +142,8 @@ struct btrfs_ordered_sum;
#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
+#define BTRFS_DEV_REPLACE_DEVID 0
+
/*
* the max metadata block size. This limit is somewhat artificial,
* but the memmove costs go through the roof for larger blocks.
@@ -172,6 +174,9 @@ static int btrfs_csum_sizes[] = { 4, 0 };
/* four bytes for CRC32 */
#define BTRFS_EMPTY_DIR_SIZE 0
+/* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
+#define REQ_GET_READ_MIRRORS (1 << 30)
+
#define BTRFS_FT_UNKNOWN 0
#define BTRFS_FT_REG_FILE 1
#define BTRFS_FT_DIR 2
@@ -571,6 +576,7 @@ struct btrfs_path {
unsigned int skip_locking:1;
unsigned int leave_spinning:1;
unsigned int search_commit_root:1;
+ unsigned int really_keep_locks:1;
};
/*
@@ -885,6 +891,59 @@ struct btrfs_dev_stats_item {
__le64 values[BTRFS_DEV_STAT_VALUES_MAX];
} __attribute__ ((__packed__));
+#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
+#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
+#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
+#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
+#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
+#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
+#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
+
+struct btrfs_dev_replace {
+ u64 replace_state; /* see #define above */
+ u64 time_started; /* seconds since 1-Jan-1970 */
+ u64 time_stopped; /* seconds since 1-Jan-1970 */
+ atomic64_t num_write_errors;
+ atomic64_t num_uncorrectable_read_errors;
+
+ u64 cursor_left;
+ u64 committed_cursor_left;
+ u64 cursor_left_last_write_of_item;
+ u64 cursor_right;
+
+ u64 cont_reading_from_srcdev_mode; /* see #define above */
+
+ int is_valid;
+ int item_needs_writeback;
+ struct btrfs_device *srcdev;
+ struct btrfs_device *tgtdev;
+
+ pid_t lock_owner;
+ atomic_t nesting_level;
+ struct mutex lock_finishing_cancel_unmount;
+ struct mutex lock_management_lock;
+ struct mutex lock;
+
+ struct btrfs_scrub_progress scrub_progress;
+};
+
+struct btrfs_dev_replace_item {
+ /*
+ * grow this item struct at the end for future enhancements and keep
+ * the existing values unchanged
+ */
+ __le64 src_devid;
+ __le64 cursor_left;
+ __le64 cursor_right;
+ __le64 cont_reading_from_srcdev_mode;
+
+ __le64 replace_state;
+ __le64 time_started;
+ __le64 time_stopped;
+ __le64 num_write_errors;
+ __le64 num_uncorrectable_read_errors;
+} __attribute__ ((__packed__));
+
/* different types of block groups (and chunks) */
#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
@@ -1333,6 +1392,7 @@ struct btrfs_fs_info {
struct btrfs_workers generic_worker;
struct btrfs_workers workers;
struct btrfs_workers delalloc_workers;
+ struct btrfs_workers flush_workers;
struct btrfs_workers endio_workers;
struct btrfs_workers endio_meta_workers;
struct btrfs_workers endio_meta_write_workers;
@@ -1429,6 +1489,8 @@ struct btrfs_fs_info {
struct rw_semaphore scrub_super_lock;
int scrub_workers_refcnt;
struct btrfs_workers scrub_workers;
+ struct btrfs_workers scrub_wr_completion_workers;
+ struct btrfs_workers scrub_nocow_workers;
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
u32 check_integrity_print_mask;
@@ -1470,6 +1532,11 @@ struct btrfs_fs_info {
int backup_root_index;
int num_tolerated_disk_barrier_failures;
+
+ /* device replace state */
+ struct btrfs_dev_replace dev_replace;
+
+ atomic_t mutually_exclusive_operation_running;
};
/*
@@ -1579,7 +1646,7 @@ struct btrfs_root {
int force_cow;
- spinlock_t root_times_lock;
+ spinlock_t root_item_lock;
};
struct btrfs_ioctl_defrag_range_args {
@@ -1723,6 +1790,12 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_DEV_STATS_KEY 249
/*
+ * Persistantly stores the device replace state in the device tree.
+ * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
+ */
+#define BTRFS_DEV_REPLACE_KEY 250
+
+/*
* string items are for debugging. They just store a short string of
* data in the FS
*/
@@ -1787,7 +1860,7 @@ struct btrfs_map_token {
static inline void btrfs_init_map_token (struct btrfs_map_token *token)
{
- memset(token, 0, sizeof(*token));
+ token->kaddr = NULL;
}
/* some macros to generate set/get funcs for the struct fields. This
@@ -2755,6 +2828,49 @@ BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
rsv_excl, 64);
+/* btrfs_dev_replace_item */
+BTRFS_SETGET_FUNCS(dev_replace_src_devid,
+ struct btrfs_dev_replace_item, src_devid, 64);
+BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
+ struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
+ 64);
+BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
+ replace_state, 64);
+BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
+ time_started, 64);
+BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
+ time_stopped, 64);
+BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
+ num_write_errors, 64);
+BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
+ struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
+ 64);
+BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
+ cursor_left, 64);
+BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
+ cursor_right, 64);
+
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
+ struct btrfs_dev_replace_item, src_devid, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
+ struct btrfs_dev_replace_item,
+ cont_reading_from_srcdev_mode, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
+ struct btrfs_dev_replace_item, replace_state, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
+ struct btrfs_dev_replace_item, time_started, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
+ struct btrfs_dev_replace_item, time_stopped, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
+ struct btrfs_dev_replace_item, num_write_errors, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
+ struct btrfs_dev_replace_item,
+ num_uncorrectable_read_errors, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
+ struct btrfs_dev_replace_item, cursor_left, 64);
+BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
+ struct btrfs_dev_replace_item, cursor_right, 64);
+
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
{
return sb->s_fs_info;
@@ -2900,6 +3016,18 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
+
+enum btrfs_reserve_flush_enum {
+ /* If we are in the transaction, we can't flush anything.*/
+ BTRFS_RESERVE_NO_FLUSH,
+ /*
+ * Flushing delalloc may cause deadlock somewhere, in this
+ * case, use FLUSH LIMIT
+ */
+ BTRFS_RESERVE_FLUSH_LIMIT,
+ BTRFS_RESERVE_FLUSH_ALL,
+};
+
int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
@@ -2919,19 +3047,13 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
void btrfs_free_block_rsv(struct btrfs_root *root,
struct btrfs_block_rsv *rsv);
int btrfs_block_rsv_add(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 num_bytes);
-int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 num_bytes);
+ struct btrfs_block_rsv *block_rsv, u64 num_bytes,
+ enum btrfs_reserve_flush_enum flush);
int btrfs_block_rsv_check(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 min_reserved);
-int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 min_reserved);
+ struct btrfs_block_rsv *block_rsv, u64 min_reserved,
+ enum btrfs_reserve_flush_enum flush);
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
struct btrfs_block_rsv *dst_rsv,
u64 num_bytes);
@@ -2955,6 +3077,7 @@ int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
+int __get_raid_index(u64 flags);
/* ctree.c */
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
int level, int *slot);
@@ -3065,6 +3188,9 @@ static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
}
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
+int btrfs_next_leaf_write(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_path *path,
+ int del);
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
u64 time_seq);
static inline int btrfs_next_old_item(struct btrfs_root *root,
@@ -3157,6 +3283,8 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
/* dir-item.c */
+int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
+ const char *name, int name_len);
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *name,
int name_len, struct inode *dir,
@@ -3256,6 +3384,7 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid,
u64 bytenr, int mod);
+u64 btrfs_file_extent_length(struct btrfs_path *path);
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_ordered_sum *sums);
@@ -3271,6 +3400,19 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
struct list_head *list, int search_commit);
/* inode.c */
+struct btrfs_delalloc_work {
+ struct inode *inode;
+ int wait;
+ int delay_iput;
+ struct completion completion;
+ struct list_head list;
+ struct btrfs_work work;
+};
+
+struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
+ int wait, int delay_iput);
+void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);
+
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
size_t pg_offset, u64 start, u64 len,
int create);
@@ -3370,9 +3512,12 @@ void btrfs_get_block_group_info(struct list_head *groups_list,
struct btrfs_ioctl_space_info *space);
/* file.c */
+int btrfs_auto_defrag_init(void);
+void btrfs_auto_defrag_exit(void);
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
+void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
int skip_pinned);
@@ -3519,15 +3664,16 @@ int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_pending_snapshot *pending);
/* scrub.c */
-int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
- struct btrfs_scrub_progress *progress, int readonly);
+int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
+ u64 end, struct btrfs_scrub_progress *progress,
+ int readonly, int is_dev_replace);
void btrfs_scrub_pause(struct btrfs_root *root);
void btrfs_scrub_pause_super(struct btrfs_root *root);
void btrfs_scrub_continue(struct btrfs_root *root);
void btrfs_scrub_continue_super(struct btrfs_root *root);
-int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
-int btrfs_scrub_cancel(struct btrfs_root *root);
-int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
+int btrfs_scrub_cancel(struct btrfs_fs_info *info);
+int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
+ struct btrfs_device *dev);
int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
struct btrfs_scrub_progress *progress);
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 478f66bdc57b..34836036f01b 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -651,7 +651,8 @@ static int btrfs_delayed_inode_reserve_metadata(
*/
if (!src_rsv || (!trans->bytes_reserved &&
src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) {
- ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes);
+ ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes,
+ BTRFS_RESERVE_NO_FLUSH);
/*
* Since we're under a transaction reserve_metadata_bytes could
* try to commit the transaction which will make it return
@@ -686,7 +687,8 @@ static int btrfs_delayed_inode_reserve_metadata(
* reserve something strictly for us. If not be a pain and try
* to steal from the delalloc block rsv.
*/
- ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes);
+ ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes,
+ BTRFS_RESERVE_NO_FLUSH);
if (!ret)
goto out;
@@ -1255,7 +1257,6 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work)
struct btrfs_delayed_node *delayed_node = NULL;
struct btrfs_root *root;
struct btrfs_block_rsv *block_rsv;
- unsigned long nr = 0;
int need_requeue = 0;
int ret;
@@ -1316,11 +1317,9 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work)
delayed_node);
mutex_unlock(&delayed_node->mutex);
- nr = trans->blocks_used;
-
trans->block_rsv = block_rsv;
btrfs_end_transaction_dmeta(trans, root);
- __btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty_nodelay(root);
free_path:
btrfs_free_path(path);
out:
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
new file mode 100644
index 000000000000..66dbc8dbddf7
--- /dev/null
+++ b/fs/btrfs/dev-replace.c
@@ -0,0 +1,856 @@
+/*
+ * Copyright (C) STRATO AG 2012. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+#include <linux/sched.h>
+#include <linux/bio.h>
+#include <linux/slab.h>
+#include <linux/buffer_head.h>
+#include <linux/blkdev.h>
+#include <linux/random.h>
+#include <linux/iocontext.h>
+#include <linux/capability.h>
+#include <linux/kthread.h>
+#include <linux/math64.h>
+#include <asm/div64.h>
+#include "compat.h"
+#include "ctree.h"
+#include "extent_map.h"
+#include "disk-io.h"
+#include "transaction.h"
+#include "print-tree.h"
+#include "volumes.h"
+#include "async-thread.h"
+#include "check-integrity.h"
+#include "rcu-string.h"
+#include "dev-replace.h"
+
+static u64 btrfs_get_seconds_since_1970(void);
+static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
+ int scrub_ret);
+static void btrfs_dev_replace_update_device_in_mapping_tree(
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_device *srcdev,
+ struct btrfs_device *tgtdev);
+static int btrfs_dev_replace_find_srcdev(struct btrfs_root *root, u64 srcdevid,
+ char *srcdev_name,
+ struct btrfs_device **device);
+static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info);
+static int btrfs_dev_replace_kthread(void *data);
+static int btrfs_dev_replace_continue_on_mount(struct btrfs_fs_info *fs_info);
+
+
+int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_key key;
+ struct btrfs_root *dev_root = fs_info->dev_root;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ struct extent_buffer *eb;
+ int slot;
+ int ret = 0;
+ struct btrfs_path *path = NULL;
+ int item_size;
+ struct btrfs_dev_replace_item *ptr;
+ u64 src_devid;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ key.objectid = 0;
+ key.type = BTRFS_DEV_REPLACE_KEY;
+ key.offset = 0;
+ ret = btrfs_search_slot(NULL, dev_root, &key, path, 0, 0);
+ if (ret) {
+no_valid_dev_replace_entry_found:
+ ret = 0;
+ dev_replace->replace_state =
+ BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED;
+ dev_replace->cont_reading_from_srcdev_mode =
+ BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS;
+ dev_replace->replace_state = 0;
+ dev_replace->time_started = 0;
+ dev_replace->time_stopped = 0;
+ atomic64_set(&dev_replace->num_write_errors, 0);
+ atomic64_set(&dev_replace->num_uncorrectable_read_errors, 0);
+ dev_replace->cursor_left = 0;
+ dev_replace->committed_cursor_left = 0;
+ dev_replace->cursor_left_last_write_of_item = 0;
+ dev_replace->cursor_right = 0;
+ dev_replace->srcdev = NULL;
+ dev_replace->tgtdev = NULL;
+ dev_replace->is_valid = 0;
+ dev_replace->item_needs_writeback = 0;
+ goto out;
+ }
+ slot = path->slots[0];
+ eb = path->nodes[0];
+ item_size = btrfs_item_size_nr(eb, slot);
+ ptr = btrfs_item_ptr(eb, slot, struct btrfs_dev_replace_item);
+
+ if (item_size != sizeof(struct btrfs_dev_replace_item)) {
+ pr_warn("btrfs: dev_replace entry found has unexpected size, ignore entry\n");
+ goto no_valid_dev_replace_entry_found;
+ }
+
+ src_devid = btrfs_dev_replace_src_devid(eb, ptr);
+ dev_replace->cont_reading_from_srcdev_mode =
+ btrfs_dev_replace_cont_reading_from_srcdev_mode(eb, ptr);
+ dev_replace->replace_state = btrfs_dev_replace_replace_state(eb, ptr);
+ dev_replace->time_started = btrfs_dev_replace_time_started(eb, ptr);
+ dev_replace->time_stopped =
+ btrfs_dev_replace_time_stopped(eb, ptr);
+ atomic64_set(&dev_replace->num_write_errors,
+ btrfs_dev_replace_num_write_errors(eb, ptr));
+ atomic64_set(&dev_replace->num_uncorrectable_read_errors,
+ btrfs_dev_replace_num_uncorrectable_read_errors(eb, ptr));
+ dev_replace->cursor_left = btrfs_dev_replace_cursor_left(eb, ptr);
+ dev_replace->committed_cursor_left = dev_replace->cursor_left;
+ dev_replace->cursor_left_last_write_of_item = dev_replace->cursor_left;
+ dev_replace->cursor_right = btrfs_dev_replace_cursor_right(eb, ptr);
+ dev_replace->is_valid = 1;
+
+ dev_replace->item_needs_writeback = 0;
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ dev_replace->srcdev = NULL;
+ dev_replace->tgtdev = NULL;
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ dev_replace->srcdev = btrfs_find_device(fs_info, src_devid,
+ NULL, NULL);
+ dev_replace->tgtdev = btrfs_find_device(fs_info,
+ BTRFS_DEV_REPLACE_DEVID,
+ NULL, NULL);
+ /*
+ * allow 'btrfs dev replace_cancel' if src/tgt device is
+ * missing
+ */
+ if (!dev_replace->srcdev &&
+ !btrfs_test_opt(dev_root, DEGRADED)) {
+ ret = -EIO;
+ pr_warn("btrfs: cannot mount because device replace operation is ongoing and\n" "srcdev (devid %llu) is missing, need to run 'btrfs dev scan'?\n",
+ (unsigned long long)src_devid);
+ }
+ if (!dev_replace->tgtdev &&
+ !btrfs_test_opt(dev_root, DEGRADED)) {
+ ret = -EIO;
+ pr_warn("btrfs: cannot mount because device replace operation is ongoing and\n" "tgtdev (devid %llu) is missing, need to run btrfs dev scan?\n",
+ (unsigned long long)BTRFS_DEV_REPLACE_DEVID);
+ }
+ if (dev_replace->tgtdev) {
+ if (dev_replace->srcdev) {
+ dev_replace->tgtdev->total_bytes =
+ dev_replace->srcdev->total_bytes;
+ dev_replace->tgtdev->disk_total_bytes =
+ dev_replace->srcdev->disk_total_bytes;
+ dev_replace->tgtdev->bytes_used =
+ dev_replace->srcdev->bytes_used;
+ }
+ dev_replace->tgtdev->is_tgtdev_for_dev_replace = 1;
+ btrfs_init_dev_replace_tgtdev_for_resume(fs_info,
+ dev_replace->tgtdev);
+ }
+ break;
+ }
+
+out:
+ if (path)
+ btrfs_free_path(path);
+ return ret;
+}
+
+/*
+ * called from commit_transaction. Writes changed device replace state to
+ * disk.
+ */
+int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
+{
+ int ret;
+ struct btrfs_root *dev_root = fs_info->dev_root;
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ struct extent_buffer *eb;
+ struct btrfs_dev_replace_item *ptr;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+
+ btrfs_dev_replace_lock(dev_replace);
+ if (!dev_replace->is_valid ||
+ !dev_replace->item_needs_writeback) {
+ btrfs_dev_replace_unlock(dev_replace);
+ return 0;
+ }
+ btrfs_dev_replace_unlock(dev_replace);
+
+ key.objectid = 0;
+ key.type = BTRFS_DEV_REPLACE_KEY;
+ key.offset = 0;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ ret = btrfs_search_slot(trans, dev_root, &key, path, -1, 1);
+ if (ret < 0) {
+ pr_warn("btrfs: error %d while searching for dev_replace item!\n",
+ ret);
+ goto out;
+ }
+
+ if (ret == 0 &&
+ btrfs_item_size_nr(path->nodes[0], path->slots[0]) < sizeof(*ptr)) {
+ /*
+ * need to delete old one and insert a new one.
+ * Since no attempt is made to recover any old state, if the
+ * dev_replace state is 'running', the data on the target
+ * drive is lost.
+ * It would be possible to recover the state: just make sure
+ * that the beginning of the item is never changed and always
+ * contains all the essential information. Then read this
+ * minimal set of information and use it as a base for the
+ * new state.
+ */
+ ret = btrfs_del_item(trans, dev_root, path);
+ if (ret != 0) {
+ pr_warn("btrfs: delete too small dev_replace item failed %d!\n",
+ ret);
+ goto out;
+ }
+ ret = 1;
+ }
+
+ if (ret == 1) {
+ /* need to insert a new item */
+ btrfs_release_path(path);
+ ret = btrfs_insert_empty_item(trans, dev_root, path,
+ &key, sizeof(*ptr));
+ if (ret < 0) {
+ pr_warn("btrfs: insert dev_replace item failed %d!\n",
+ ret);
+ goto out;
+ }
+ }
+
+ eb = path->nodes[0];
+ ptr = btrfs_item_ptr(eb, path->slots[0],
+ struct btrfs_dev_replace_item);
+
+ btrfs_dev_replace_lock(dev_replace);
+ if (dev_replace->srcdev)
+ btrfs_set_dev_replace_src_devid(eb, ptr,
+ dev_replace->srcdev->devid);
+ else
+ btrfs_set_dev_replace_src_devid(eb, ptr, (u64)-1);
+ btrfs_set_dev_replace_cont_reading_from_srcdev_mode(eb, ptr,
+ dev_replace->cont_reading_from_srcdev_mode);
+ btrfs_set_dev_replace_replace_state(eb, ptr,
+ dev_replace->replace_state);
+ btrfs_set_dev_replace_time_started(eb, ptr, dev_replace->time_started);
+ btrfs_set_dev_replace_time_stopped(eb, ptr, dev_replace->time_stopped);
+ btrfs_set_dev_replace_num_write_errors(eb, ptr,
+ atomic64_read(&dev_replace->num_write_errors));
+ btrfs_set_dev_replace_num_uncorrectable_read_errors(eb, ptr,
+ atomic64_read(&dev_replace->num_uncorrectable_read_errors));
+ dev_replace->cursor_left_last_write_of_item =
+ dev_replace->cursor_left;
+ btrfs_set_dev_replace_cursor_left(eb, ptr,
+ dev_replace->cursor_left_last_write_of_item);
+ btrfs_set_dev_replace_cursor_right(eb, ptr,
+ dev_replace->cursor_right);
+ dev_replace->item_needs_writeback = 0;
+ btrfs_dev_replace_unlock(dev_replace);
+
+ btrfs_mark_buffer_dirty(eb);
+
+out:
+ btrfs_free_path(path);
+
+ return ret;
+}
+
+void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+
+ dev_replace->committed_cursor_left =
+ dev_replace->cursor_left_last_write_of_item;
+}
+
+static u64 btrfs_get_seconds_since_1970(void)
+{
+ struct timespec t = CURRENT_TIME_SEC;
+
+ return t.tv_sec;
+}
+
+int btrfs_dev_replace_start(struct btrfs_root *root,
+ struct btrfs_ioctl_dev_replace_args *args)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ int ret;
+ struct btrfs_device *tgt_device = NULL;
+ struct btrfs_device *src_device = NULL;
+
+ switch (args->start.cont_reading_from_srcdev_mode) {
+ case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS:
+ case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if ((args->start.srcdevid == 0 && args->start.srcdev_name[0] == '\0') ||
+ args->start.tgtdev_name[0] == '\0')
+ return -EINVAL;
+
+ mutex_lock(&fs_info->volume_mutex);
+ ret = btrfs_init_dev_replace_tgtdev(root, args->start.tgtdev_name,
+ &tgt_device);
+ if (ret) {
+ pr_err("btrfs: target device %s is invalid!\n",
+ args->start.tgtdev_name);
+ mutex_unlock(&fs_info->volume_mutex);
+ return -EINVAL;
+ }
+
+ ret = btrfs_dev_replace_find_srcdev(root, args->start.srcdevid,
+ args->start.srcdev_name,
+ &src_device);
+ mutex_unlock(&fs_info->volume_mutex);
+ if (ret) {
+ ret = -EINVAL;
+ goto leave_no_lock;
+ }
+
+ if (tgt_device->total_bytes < src_device->total_bytes) {
+ pr_err("btrfs: target device is smaller than source device!\n");
+ ret = -EINVAL;
+ goto leave_no_lock;
+ }
+
+ btrfs_dev_replace_lock(dev_replace);
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED;
+ goto leave;
+ }
+
+ dev_replace->cont_reading_from_srcdev_mode =
+ args->start.cont_reading_from_srcdev_mode;
+ WARN_ON(!src_device);
+ dev_replace->srcdev = src_device;
+ WARN_ON(!tgt_device);
+ dev_replace->tgtdev = tgt_device;
+
+ printk_in_rcu(KERN_INFO
+ "btrfs: dev_replace from %s (devid %llu) to %s) started\n",
+ src_device->missing ? "<missing disk>" :
+ rcu_str_deref(src_device->name),
+ src_device->devid,
+ rcu_str_deref(tgt_device->name));
+
+ tgt_device->total_bytes = src_device->total_bytes;
+ tgt_device->disk_total_bytes = src_device->disk_total_bytes;
+ tgt_device->bytes_used = src_device->bytes_used;
+
+ /*
+ * from now on, the writes to the srcdev are all duplicated to
+ * go to the tgtdev as well (refer to btrfs_map_block()).
+ */
+ dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED;
+ dev_replace->time_started = btrfs_get_seconds_since_1970();
+ dev_replace->cursor_left = 0;
+ dev_replace->committed_cursor_left = 0;
+ dev_replace->cursor_left_last_write_of_item = 0;
+ dev_replace->cursor_right = 0;
+ dev_replace->is_valid = 1;
+ dev_replace->item_needs_writeback = 1;
+ args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
+ btrfs_dev_replace_unlock(dev_replace);
+
+ btrfs_wait_ordered_extents(root, 0);
+
+ /* force writing the updated state information to disk */
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ btrfs_dev_replace_lock(dev_replace);
+ goto leave;
+ }
+
+ ret = btrfs_commit_transaction(trans, root);
+ WARN_ON(ret);
+
+ /* the disk copy procedure reuses the scrub code */
+ ret = btrfs_scrub_dev(fs_info, src_device->devid, 0,
+ src_device->total_bytes,
+ &dev_replace->scrub_progress, 0, 1);
+
+ ret = btrfs_dev_replace_finishing(root->fs_info, ret);
+ WARN_ON(ret);
+
+ return 0;
+
+leave:
+ dev_replace->srcdev = NULL;
+ dev_replace->tgtdev = NULL;
+ btrfs_dev_replace_unlock(dev_replace);
+leave_no_lock:
+ if (tgt_device)
+ btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device);
+ return ret;
+}
+
+static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
+ int scrub_ret)
+{
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ struct btrfs_device *tgt_device;
+ struct btrfs_device *src_device;
+ struct btrfs_root *root = fs_info->tree_root;
+ u8 uuid_tmp[BTRFS_UUID_SIZE];
+ struct btrfs_trans_handle *trans;
+ int ret = 0;
+
+ /* don't allow cancel or unmount to disturb the finishing procedure */
+ mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
+
+ btrfs_dev_replace_lock(dev_replace);
+ /* was the operation canceled, or is it finished? */
+ if (dev_replace->replace_state !=
+ BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) {
+ btrfs_dev_replace_unlock(dev_replace);
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+ return 0;
+ }
+
+ tgt_device = dev_replace->tgtdev;
+ src_device = dev_replace->srcdev;
+ btrfs_dev_replace_unlock(dev_replace);
+
+ /* replace old device with new one in mapping tree */
+ if (!scrub_ret)
+ btrfs_dev_replace_update_device_in_mapping_tree(fs_info,
+ src_device,
+ tgt_device);
+
+ /*
+ * flush all outstanding I/O and inode extent mappings before the
+ * copy operation is declared as being finished
+ */
+ btrfs_start_delalloc_inodes(root, 0);
+ btrfs_wait_ordered_extents(root, 0);
+
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+ return PTR_ERR(trans);
+ }
+ ret = btrfs_commit_transaction(trans, root);
+ WARN_ON(ret);
+
+ /* keep away write_all_supers() during the finishing procedure */
+ mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
+ btrfs_dev_replace_lock(dev_replace);
+ dev_replace->replace_state =
+ scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED
+ : BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED;
+ dev_replace->tgtdev = NULL;
+ dev_replace->srcdev = NULL;
+ dev_replace->time_stopped = btrfs_get_seconds_since_1970();
+ dev_replace->item_needs_writeback = 1;
+
+ if (scrub_ret) {
+ printk_in_rcu(KERN_ERR
+ "btrfs: btrfs_scrub_dev(%s, %llu, %s) failed %d\n",
+ src_device->missing ? "<missing disk>" :
+ rcu_str_deref(src_device->name),
+ src_device->devid,
+ rcu_str_deref(tgt_device->name), scrub_ret);
+ btrfs_dev_replace_unlock(dev_replace);
+ mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
+ if (tgt_device)
+ btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device);
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+
+ return 0;
+ }
+
+ printk_in_rcu(KERN_INFO
+ "btrfs: dev_replace from %s (devid %llu) to %s) finished\n",
+ src_device->missing ? "<missing disk>" :
+ rcu_str_deref(src_device->name),
+ src_device->devid,
+ rcu_str_deref(tgt_device->name));
+ tgt_device->is_tgtdev_for_dev_replace = 0;
+ tgt_device->devid = src_device->devid;
+ src_device->devid = BTRFS_DEV_REPLACE_DEVID;
+ tgt_device->bytes_used = src_device->bytes_used;
+ memcpy(uuid_tmp, tgt_device->uuid, sizeof(uuid_tmp));
+ memcpy(tgt_device->uuid, src_device->uuid, sizeof(tgt_device->uuid));
+ memcpy(src_device->uuid, uuid_tmp, sizeof(src_device->uuid));
+ tgt_device->total_bytes = src_device->total_bytes;
+ tgt_device->disk_total_bytes = src_device->disk_total_bytes;
+ tgt_device->bytes_used = src_device->bytes_used;
+ if (fs_info->sb->s_bdev == src_device->bdev)
+ fs_info->sb->s_bdev = tgt_device->bdev;
+ if (fs_info->fs_devices->latest_bdev == src_device->bdev)
+ fs_info->fs_devices->latest_bdev = tgt_device->bdev;
+ list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list);
+
+ btrfs_rm_dev_replace_srcdev(fs_info, src_device);
+ if (src_device->bdev) {
+ /* zero out the old super */
+ btrfs_scratch_superblock(src_device);
+ }
+ /*
+ * this is again a consistent state where no dev_replace procedure
+ * is running, the target device is part of the filesystem, the
+ * source device is not part of the filesystem anymore and its 1st
+ * superblock is scratched out so that it is no longer marked to
+ * belong to this filesystem.
+ */
+ btrfs_dev_replace_unlock(dev_replace);
+ mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
+
+ /* write back the superblocks */
+ trans = btrfs_start_transaction(root, 0);
+ if (!IS_ERR(trans))
+ btrfs_commit_transaction(trans, root);
+
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+
+ return 0;
+}
+
+static void btrfs_dev_replace_update_device_in_mapping_tree(
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_device *srcdev,
+ struct btrfs_device *tgtdev)
+{
+ struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree;
+ struct extent_map *em;
+ struct map_lookup *map;
+ u64 start = 0;
+ int i;
+
+ write_lock(&em_tree->lock);
+ do {
+ em = lookup_extent_mapping(em_tree, start, (u64)-1);
+ if (!em)
+ break;
+ map = (struct map_lookup *)em->bdev;
+ for (i = 0; i < map->num_stripes; i++)
+ if (srcdev == map->stripes[i].dev)
+ map->stripes[i].dev = tgtdev;
+ start = em->start + em->len;
+ free_extent_map(em);
+ } while (start);
+ write_unlock(&em_tree->lock);
+}
+
+static int btrfs_dev_replace_find_srcdev(struct btrfs_root *root, u64 srcdevid,
+ char *srcdev_name,
+ struct btrfs_device **device)
+{
+ int ret;
+
+ if (srcdevid) {
+ ret = 0;
+ *device = btrfs_find_device(root->fs_info, srcdevid, NULL,
+ NULL);
+ if (!*device)
+ ret = -ENOENT;
+ } else {
+ ret = btrfs_find_device_missing_or_by_path(root, srcdev_name,
+ device);
+ }
+ return ret;
+}
+
+void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
+ struct btrfs_ioctl_dev_replace_args *args)
+{
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+
+ btrfs_dev_replace_lock(dev_replace);
+ /* even if !dev_replace_is_valid, the values are good enough for
+ * the replace_status ioctl */
+ args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
+ args->status.replace_state = dev_replace->replace_state;
+ args->status.time_started = dev_replace->time_started;
+ args->status.time_stopped = dev_replace->time_stopped;
+ args->status.num_write_errors =
+ atomic64_read(&dev_replace->num_write_errors);
+ args->status.num_uncorrectable_read_errors =
+ atomic64_read(&dev_replace->num_uncorrectable_read_errors);
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ args->status.progress_1000 = 0;
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ args->status.progress_1000 = 1000;
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ args->status.progress_1000 = div64_u64(dev_replace->cursor_left,
+ div64_u64(dev_replace->srcdev->total_bytes, 1000));
+ break;
+ }
+ btrfs_dev_replace_unlock(dev_replace);
+}
+
+int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info,
+ struct btrfs_ioctl_dev_replace_args *args)
+{
+ args->result = __btrfs_dev_replace_cancel(fs_info);
+ return 0;
+}
+
+static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ struct btrfs_device *tgt_device = NULL;
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *root = fs_info->tree_root;
+ u64 result;
+ int ret;
+
+ mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
+ btrfs_dev_replace_lock(dev_replace);
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED;
+ btrfs_dev_replace_unlock(dev_replace);
+ goto leave;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
+ tgt_device = dev_replace->tgtdev;
+ dev_replace->tgtdev = NULL;
+ dev_replace->srcdev = NULL;
+ break;
+ }
+ dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED;
+ dev_replace->time_stopped = btrfs_get_seconds_since_1970();
+ dev_replace->item_needs_writeback = 1;
+ btrfs_dev_replace_unlock(dev_replace);
+ btrfs_scrub_cancel(fs_info);
+
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+ return PTR_ERR(trans);
+ }
+ ret = btrfs_commit_transaction(trans, root);
+ WARN_ON(ret);
+ if (tgt_device)
+ btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device);
+
+leave:
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+ return result;
+}
+
+void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+
+ mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
+ btrfs_dev_replace_lock(dev_replace);
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ dev_replace->replace_state =
+ BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED;
+ dev_replace->time_stopped = btrfs_get_seconds_since_1970();
+ dev_replace->item_needs_writeback = 1;
+ pr_info("btrfs: suspending dev_replace for unmount\n");
+ break;
+ }
+
+ btrfs_dev_replace_unlock(dev_replace);
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+}
+
+/* resume dev_replace procedure that was interrupted by unmount */
+int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info)
+{
+ struct task_struct *task;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+
+ btrfs_dev_replace_lock(dev_replace);
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ btrfs_dev_replace_unlock(dev_replace);
+ return 0;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ dev_replace->replace_state =
+ BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED;
+ break;
+ }
+ if (!dev_replace->tgtdev || !dev_replace->tgtdev->bdev) {
+ pr_info("btrfs: cannot continue dev_replace, tgtdev is missing\n"
+ "btrfs: you may cancel the operation after 'mount -o degraded'\n");
+ btrfs_dev_replace_unlock(dev_replace);
+ return 0;
+ }
+ btrfs_dev_replace_unlock(dev_replace);
+
+ WARN_ON(atomic_xchg(
+ &fs_info->mutually_exclusive_operation_running, 1));
+ task = kthread_run(btrfs_dev_replace_kthread, fs_info, "btrfs-devrepl");
+ return PTR_RET(task);
+}
+
+static int btrfs_dev_replace_kthread(void *data)
+{
+ struct btrfs_fs_info *fs_info = data;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ struct btrfs_ioctl_dev_replace_args *status_args;
+ u64 progress;
+
+ status_args = kzalloc(sizeof(*status_args), GFP_NOFS);
+ if (status_args) {
+ btrfs_dev_replace_status(fs_info, status_args);
+ progress = status_args->status.progress_1000;
+ kfree(status_args);
+ do_div(progress, 10);
+ printk_in_rcu(KERN_INFO
+ "btrfs: continuing dev_replace from %s (devid %llu) to %s @%u%%\n",
+ dev_replace->srcdev->missing ? "<missing disk>" :
+ rcu_str_deref(dev_replace->srcdev->name),
+ dev_replace->srcdev->devid,
+ dev_replace->tgtdev ?
+ rcu_str_deref(dev_replace->tgtdev->name) :
+ "<missing target disk>",
+ (unsigned int)progress);
+ }
+ btrfs_dev_replace_continue_on_mount(fs_info);
+ atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
+
+ return 0;
+}
+
+static int btrfs_dev_replace_continue_on_mount(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ int ret;
+
+ ret = btrfs_scrub_dev(fs_info, dev_replace->srcdev->devid,
+ dev_replace->committed_cursor_left,
+ dev_replace->srcdev->total_bytes,
+ &dev_replace->scrub_progress, 0, 1);
+ ret = btrfs_dev_replace_finishing(fs_info, ret);
+ WARN_ON(ret);
+ return 0;
+}
+
+int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace)
+{
+ if (!dev_replace->is_valid)
+ return 0;
+
+ switch (dev_replace->replace_state) {
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
+ return 0;
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
+ case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
+ /*
+ * return true even if tgtdev is missing (this is
+ * something that can happen if the dev_replace
+ * procedure is suspended by an umount and then
+ * the tgtdev is missing (or "btrfs dev scan") was
+ * not called and the the filesystem is remounted
+ * in degraded state. This does not stop the
+ * dev_replace procedure. It needs to be canceled
+ * manually if the cancelation is wanted.
+ */
+ break;
+ }
+ return 1;
+}
+
+void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace)
+{
+ /* the beginning is just an optimization for the typical case */
+ if (atomic_read(&dev_replace->nesting_level) == 0) {
+acquire_lock:
+ /* this is not a nested case where the same thread
+ * is trying to acqurire the same lock twice */
+ mutex_lock(&dev_replace->lock);
+ mutex_lock(&dev_replace->lock_management_lock);
+ dev_replace->lock_owner = current->pid;
+ atomic_inc(&dev_replace->nesting_level);
+ mutex_unlock(&dev_replace->lock_management_lock);
+ return;
+ }
+
+ mutex_lock(&dev_replace->lock_management_lock);
+ if (atomic_read(&dev_replace->nesting_level) > 0 &&
+ dev_replace->lock_owner == current->pid) {
+ WARN_ON(!mutex_is_locked(&dev_replace->lock));
+ atomic_inc(&dev_replace->nesting_level);
+ mutex_unlock(&dev_replace->lock_management_lock);
+ return;
+ }
+
+ mutex_unlock(&dev_replace->lock_management_lock);
+ goto acquire_lock;
+}
+
+void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace)
+{
+ WARN_ON(!mutex_is_locked(&dev_replace->lock));
+ mutex_lock(&dev_replace->lock_management_lock);
+ WARN_ON(atomic_read(&dev_replace->nesting_level) < 1);
+ WARN_ON(dev_replace->lock_owner != current->pid);
+ atomic_dec(&dev_replace->nesting_level);
+ if (atomic_read(&dev_replace->nesting_level) == 0) {
+ dev_replace->lock_owner = 0;
+ mutex_unlock(&dev_replace->lock_management_lock);
+ mutex_unlock(&dev_replace->lock);
+ } else {
+ mutex_unlock(&dev_replace->lock_management_lock);
+ }
+}
diff --git a/fs/btrfs/dev-replace.h b/fs/btrfs/dev-replace.h
new file mode 100644
index 000000000000..20035cbbf021
--- /dev/null
+++ b/fs/btrfs/dev-replace.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) STRATO AG 2012. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#if !defined(__BTRFS_DEV_REPLACE__)
+#define __BTRFS_DEV_REPLACE__
+
+struct btrfs_ioctl_dev_replace_args;
+
+int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info);
+int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info);
+void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info);
+int btrfs_dev_replace_start(struct btrfs_root *root,
+ struct btrfs_ioctl_dev_replace_args *args);
+void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
+ struct btrfs_ioctl_dev_replace_args *args);
+int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info,
+ struct btrfs_ioctl_dev_replace_args *args);
+void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info);
+int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info);
+int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace);
+void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace);
+void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace);
+
+static inline void btrfs_dev_replace_stats_inc(atomic64_t *stat_value)
+{
+ atomic64_inc(stat_value);
+}
+#endif
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index c1a074d0696f..502c2158167c 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -213,6 +213,65 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
return btrfs_match_dir_item_name(root, path, name, name_len);
}
+int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
+ const char *name, int name_len)
+{
+ int ret;
+ struct btrfs_key key;
+ struct btrfs_dir_item *di;
+ int data_size;
+ struct extent_buffer *leaf;
+ int slot;
+ struct btrfs_path *path;
+
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = dir;
+ btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
+ key.offset = btrfs_name_hash(name, name_len);
+
+ ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+
+ /* return back any errors */
+ if (ret < 0)
+ goto out;
+
+ /* nothing found, we're safe */
+ if (ret > 0) {
+ ret = 0;
+ goto out;
+ }
+
+ /* we found an item, look for our name in the item */
+ di = btrfs_match_dir_item_name(root, path, name, name_len);
+ if (di) {
+ /* our exact name was found */
+ ret = -EEXIST;
+ goto out;
+ }
+
+ /*
+ * see if there is room in the item to insert this
+ * name
+ */
+ data_size = sizeof(*di) + name_len + sizeof(struct btrfs_item);
+ leaf = path->nodes[0];
+ slot = path->slots[0];
+ if (data_size + btrfs_item_size_nr(leaf, slot) +
+ sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root)) {
+ ret = -EOVERFLOW;
+ } else {
+ /* plenty of insertion room */
+ ret = 0;
+ }
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
/*
* lookup a directory item based on index. 'dir' is the objectid
* we're searching in, and 'mod' tells us if you plan on deleting the
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 7cda51995c1e..a8f652dc940b 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -45,6 +45,7 @@
#include "inode-map.h"
#include "check-integrity.h"
#include "rcu-string.h"
+#include "dev-replace.h"
#ifdef CONFIG_X86
#include <asm/cpufeature.h>
@@ -387,7 +388,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags))
break;
- num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
+ num_copies = btrfs_num_copies(root->fs_info,
eb->start, eb->len);
if (num_copies == 1)
break;
@@ -852,11 +853,16 @@ static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
{
+ int ret;
+
/*
* when we're called for a write, we're already in the async
* submission context. Just jump into btrfs_map_bio
*/
- return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1);
+ ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1);
+ if (ret)
+ bio_endio(bio, ret);
+ return ret;
}
static int check_async_write(struct inode *inode, unsigned long bio_flags)
@@ -878,7 +884,6 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
int ret;
if (!(rw & REQ_WRITE)) {
-
/*
* called for a read, do the setup so that checksum validation
* can happen in the async kernel threads
@@ -886,26 +891,32 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info,
bio, 1);
if (ret)
- return ret;
- return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
- mirror_num, 0);
+ goto out_w_error;
+ ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
+ mirror_num, 0);
} else if (!async) {
ret = btree_csum_one_bio(bio);
if (ret)
- return ret;
- return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
- mirror_num, 0);
+ goto out_w_error;
+ ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
+ mirror_num, 0);
+ } else {
+ /*
+ * kthread helpers are used to submit writes so that
+ * checksumming can happen in parallel across all CPUs
+ */
+ ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
+ inode, rw, bio, mirror_num, 0,
+ bio_offset,
+ __btree_submit_bio_start,
+ __btree_submit_bio_done);
}
- /*
- * kthread helpers are used to submit writes so that checksumming
- * can happen in parallel across all CPUs
- */
- return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
- inode, rw, bio, mirror_num, 0,
- bio_offset,
- __btree_submit_bio_start,
- __btree_submit_bio_done);
+ if (ret) {
+out_w_error:
+ bio_endio(bio, ret);
+ }
+ return ret;
}
#ifdef CONFIG_MIGRATION
@@ -990,6 +1001,7 @@ static void btree_invalidatepage(struct page *page, unsigned long offset)
static int btree_set_page_dirty(struct page *page)
{
+#ifdef DEBUG
struct extent_buffer *eb;
BUG_ON(!PagePrivate(page));
@@ -998,6 +1010,7 @@ static int btree_set_page_dirty(struct page *page)
BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags));
BUG_ON(!atomic_read(&eb->refs));
btrfs_assert_tree_locked(eb);
+#endif
return __set_page_dirty_nobuffers(page);
}
@@ -1129,11 +1142,11 @@ void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
root->fs_info->dirty_metadata_bytes);
}
spin_unlock(&root->fs_info->delalloc_lock);
- }
- /* ugh, clear_extent_buffer_dirty needs to lock the page */
- btrfs_set_lock_blocking(buf);
- clear_extent_buffer_dirty(buf);
+ /* ugh, clear_extent_buffer_dirty needs to lock the page */
+ btrfs_set_lock_blocking(buf);
+ clear_extent_buffer_dirty(buf);
+ }
}
}
@@ -1193,7 +1206,7 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
root->root_key.objectid = objectid;
root->anon_dev = 0;
- spin_lock_init(&root->root_times_lock);
+ spin_lock_init(&root->root_item_lock);
}
static int __must_check find_and_setup_root(struct btrfs_root *tree_root,
@@ -2131,6 +2144,11 @@ int open_ctree(struct super_block *sb,
init_rwsem(&fs_info->extent_commit_sem);
init_rwsem(&fs_info->cleanup_work_sem);
init_rwsem(&fs_info->subvol_sem);
+ fs_info->dev_replace.lock_owner = 0;
+ atomic_set(&fs_info->dev_replace.nesting_level, 0);
+ mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount);
+ mutex_init(&fs_info->dev_replace.lock_management_lock);
+ mutex_init(&fs_info->dev_replace.lock);
spin_lock_init(&fs_info->qgroup_lock);
fs_info->qgroup_tree = RB_ROOT;
@@ -2279,6 +2297,10 @@ int open_ctree(struct super_block *sb,
fs_info->thread_pool_size,
&fs_info->generic_worker);
+ btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc",
+ fs_info->thread_pool_size,
+ &fs_info->generic_worker);
+
btrfs_init_workers(&fs_info->submit_workers, "submit",
min_t(u64, fs_devices->num_devices,
fs_info->thread_pool_size),
@@ -2350,6 +2372,7 @@ int open_ctree(struct super_block *sb,
ret |= btrfs_start_workers(&fs_info->delayed_workers);
ret |= btrfs_start_workers(&fs_info->caching_workers);
ret |= btrfs_start_workers(&fs_info->readahead_workers);
+ ret |= btrfs_start_workers(&fs_info->flush_workers);
if (ret) {
err = -ENOMEM;
goto fail_sb_buffer;
@@ -2418,7 +2441,11 @@ int open_ctree(struct super_block *sb,
goto fail_tree_roots;
}
- btrfs_close_extra_devices(fs_devices);
+ /*
+ * keep the device that is marked to be the target device for the
+ * dev_replace procedure
+ */
+ btrfs_close_extra_devices(fs_info, fs_devices, 0);
if (!fs_devices->latest_bdev) {
printk(KERN_CRIT "btrfs: failed to read devices on %s\n",
@@ -2490,6 +2517,14 @@ retry_root_backup:
goto fail_block_groups;
}
+ ret = btrfs_init_dev_replace(fs_info);
+ if (ret) {
+ pr_err("btrfs: failed to init dev_replace: %d\n", ret);
+ goto fail_block_groups;
+ }
+
+ btrfs_close_extra_devices(fs_info, fs_devices, 1);
+
ret = btrfs_init_space_info(fs_info);
if (ret) {
printk(KERN_ERR "Failed to initial space info: %d\n", ret);
@@ -2503,6 +2538,13 @@ retry_root_backup:
}
fs_info->num_tolerated_disk_barrier_failures =
btrfs_calc_num_tolerated_disk_barrier_failures(fs_info);
+ if (fs_info->fs_devices->missing_devices >
+ fs_info->num_tolerated_disk_barrier_failures &&
+ !(sb->s_flags & MS_RDONLY)) {
+ printk(KERN_WARNING
+ "Btrfs: too many missing devices, writeable mount is not allowed\n");
+ goto fail_block_groups;
+ }
fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root,
"btrfs-cleaner");
@@ -2631,6 +2673,13 @@ retry_root_backup:
return ret;
}
+ ret = btrfs_resume_dev_replace_async(fs_info);
+ if (ret) {
+ pr_warn("btrfs: failed to resume dev_replace\n");
+ close_ctree(tree_root);
+ return ret;
+ }
+
return 0;
fail_qgroup:
@@ -2667,6 +2716,7 @@ fail_sb_buffer:
btrfs_stop_workers(&fs_info->submit_workers);
btrfs_stop_workers(&fs_info->delayed_workers);
btrfs_stop_workers(&fs_info->caching_workers);
+ btrfs_stop_workers(&fs_info->flush_workers);
fail_alloc:
fail_iput:
btrfs_mapping_tree_free(&fs_info->mapping_tree);
@@ -3270,16 +3320,18 @@ int close_ctree(struct btrfs_root *root)
smp_mb();
/* pause restriper - we want to resume on mount */
- btrfs_pause_balance(root->fs_info);
+ btrfs_pause_balance(fs_info);
+
+ btrfs_dev_replace_suspend_for_unmount(fs_info);
- btrfs_scrub_cancel(root);
+ btrfs_scrub_cancel(fs_info);
/* wait for any defraggers to finish */
wait_event(fs_info->transaction_wait,
(atomic_read(&fs_info->defrag_running) == 0));
/* clear out the rbtree of defraggable inodes */
- btrfs_run_defrag_inodes(fs_info);
+ btrfs_cleanup_defrag_inodes(fs_info);
if (!(fs_info->sb->s_flags & MS_RDONLY)) {
ret = btrfs_commit_super(root);
@@ -3339,6 +3391,7 @@ int close_ctree(struct btrfs_root *root)
btrfs_stop_workers(&fs_info->delayed_workers);
btrfs_stop_workers(&fs_info->caching_workers);
btrfs_stop_workers(&fs_info->readahead_workers);
+ btrfs_stop_workers(&fs_info->flush_workers);
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
if (btrfs_test_opt(root, CHECK_INTEGRITY))
@@ -3383,14 +3436,12 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
int was_dirty;
btrfs_assert_tree_locked(buf);
- if (transid != root->fs_info->generation) {
- printk(KERN_CRIT "btrfs transid mismatch buffer %llu, "
+ if (transid != root->fs_info->generation)
+ WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, "
"found %llu running %llu\n",
(unsigned long long)buf->start,
(unsigned long long)transid,
(unsigned long long)root->fs_info->generation);
- WARN_ON(1);
- }
was_dirty = set_extent_buffer_dirty(buf);
if (!was_dirty) {
spin_lock(&root->fs_info->delalloc_lock);
@@ -3399,7 +3450,8 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
}
}
-void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
+static void __btrfs_btree_balance_dirty(struct btrfs_root *root,
+ int flush_delayed)
{
/*
* looks as though older kernels can get into trouble with
@@ -3411,36 +3463,26 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
if (current->flags & PF_MEMALLOC)
return;
- btrfs_balance_delayed_items(root);
+ if (flush_delayed)
+ btrfs_balance_delayed_items(root);
num_dirty = root->fs_info->dirty_metadata_bytes;
if (num_dirty > thresh) {
- balance_dirty_pages_ratelimited_nr(
- root->fs_info->btree_inode->i_mapping, 1);
+ balance_dirty_pages_ratelimited(
+ root->fs_info->btree_inode->i_mapping);
}
return;
}
-void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
+void btrfs_btree_balance_dirty(struct btrfs_root *root)
{
- /*
- * looks as though older kernels can get into trouble with
- * this code, they end up stuck in balance_dirty_pages forever
- */
- u64 num_dirty;
- unsigned long thresh = 32 * 1024 * 1024;
-
- if (current->flags & PF_MEMALLOC)
- return;
-
- num_dirty = root->fs_info->dirty_metadata_bytes;
+ __btrfs_btree_balance_dirty(root, 1);
+}
- if (num_dirty > thresh) {
- balance_dirty_pages_ratelimited_nr(
- root->fs_info->btree_inode->i_mapping, 1);
- }
- return;
+void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root)
+{
+ __btrfs_btree_balance_dirty(root, 0);
}
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 2025a9132c16..305c33efb0e3 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -62,8 +62,8 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
struct btrfs_key *location);
int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
-void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
-void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
+void btrfs_btree_balance_dirty(struct btrfs_root *root);
+void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root);
void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 604befdcc359..c61ebb630561 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -33,6 +33,7 @@
#include "volumes.h"
#include "locking.h"
#include "free-space-cache.h"
+#include "math.h"
#undef SCRAMBLE_DELAYED_REFS
@@ -649,24 +650,6 @@ void btrfs_clear_space_info_full(struct btrfs_fs_info *info)
rcu_read_unlock();
}
-static u64 div_factor(u64 num, int factor)
-{
- if (factor == 10)
- return num;
- num *= factor;
- do_div(num, 10);
- return num;
-}
-
-static u64 div_factor_fine(u64 num, int factor)
-{
- if (factor == 100)
- return num;
- num *= factor;
- do_div(num, 100);
- return num;
-}
-
u64 btrfs_find_block_group(struct btrfs_root *root,
u64 search_start, u64 search_hint, int owner)
{
@@ -1835,7 +1818,7 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
/* Tell the block device(s) that the sectors can be discarded */
- ret = btrfs_map_block(&root->fs_info->mapping_tree, REQ_DISCARD,
+ ret = btrfs_map_block(root->fs_info, REQ_DISCARD,
bytenr, &num_bytes, &bbio, 0);
/* Error condition is -ENOMEM */
if (!ret) {
@@ -2314,6 +2297,9 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
kfree(extent_op);
if (ret) {
+ list_del_init(&locked_ref->cluster);
+ mutex_unlock(&locked_ref->mutex);
+
printk(KERN_DEBUG "btrfs: run_delayed_extent_op returned %d\n", ret);
spin_lock(&delayed_refs->lock);
return ret;
@@ -2356,6 +2342,10 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
count++;
if (ret) {
+ if (locked_ref) {
+ list_del_init(&locked_ref->cluster);
+ mutex_unlock(&locked_ref->mutex);
+ }
printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned %d\n", ret);
spin_lock(&delayed_refs->lock);
return ret;
@@ -3661,7 +3651,7 @@ out:
static int can_overcommit(struct btrfs_root *root,
struct btrfs_space_info *space_info, u64 bytes,
- int flush)
+ enum btrfs_reserve_flush_enum flush)
{
u64 profile = btrfs_get_alloc_profile(root, 0);
u64 avail;
@@ -3685,11 +3675,11 @@ static int can_overcommit(struct btrfs_root *root,
avail >>= 1;
/*
- * If we aren't flushing don't let us overcommit too much, say
- * 1/8th of the space. If we can flush, let it overcommit up to
- * 1/2 of the space.
+ * If we aren't flushing all things, let us overcommit up to
+ * 1/2th of the space. If we can flush, don't let us overcommit
+ * too much, let it overcommit up to 1/8 of the space.
*/
- if (flush)
+ if (flush == BTRFS_RESERVE_FLUSH_ALL)
avail >>= 3;
else
avail >>= 1;
@@ -3699,6 +3689,20 @@ static int can_overcommit(struct btrfs_root *root,
return 0;
}
+static int writeback_inodes_sb_nr_if_idle_safe(struct super_block *sb,
+ unsigned long nr_pages,
+ enum wb_reason reason)
+{
+ if (!writeback_in_progress(sb->s_bdi) &&
+ down_read_trylock(&sb->s_umount)) {
+ writeback_inodes_sb_nr(sb, nr_pages, reason);
+ up_read(&sb->s_umount);
+ return 1;
+ }
+
+ return 0;
+}
+
/*
* shrink metadata reservation for delalloc
*/
@@ -3713,6 +3717,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
long time_left;
unsigned long nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT;
int loops = 0;
+ enum btrfs_reserve_flush_enum flush;
trans = (struct btrfs_trans_handle *)current->journal_info;
block_rsv = &root->fs_info->delalloc_block_rsv;
@@ -3730,8 +3735,9 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
while (delalloc_bytes && loops < 3) {
max_reclaim = min(delalloc_bytes, to_reclaim);
nr_pages = max_reclaim >> PAGE_CACHE_SHIFT;
- writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages,
- WB_REASON_FS_FREE_SPACE);
+ writeback_inodes_sb_nr_if_idle_safe(root->fs_info->sb,
+ nr_pages,
+ WB_REASON_FS_FREE_SPACE);
/*
* We need to wait for the async pages to actually start before
@@ -3740,8 +3746,12 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig,
wait_event(root->fs_info->async_submit_wait,
!atomic_read(&root->fs_info->async_delalloc_pages));
+ if (!trans)
+ flush = BTRFS_RESERVE_FLUSH_ALL;
+ else
+ flush = BTRFS_RESERVE_NO_FLUSH;
spin_lock(&space_info->lock);
- if (can_overcommit(root, space_info, orig, !trans)) {
+ if (can_overcommit(root, space_info, orig, flush)) {
spin_unlock(&space_info->lock);
break;
}
@@ -3899,7 +3909,8 @@ static int flush_space(struct btrfs_root *root,
*/
static int reserve_metadata_bytes(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
- u64 orig_bytes, int flush)
+ u64 orig_bytes,
+ enum btrfs_reserve_flush_enum flush)
{
struct btrfs_space_info *space_info = block_rsv->space_info;
u64 used;
@@ -3912,10 +3923,11 @@ again:
ret = 0;
spin_lock(&space_info->lock);
/*
- * We only want to wait if somebody other than us is flushing and we are
- * actually alloed to flush.
+ * We only want to wait if somebody other than us is flushing and we
+ * are actually allowed to flush all things.
*/
- while (flush && !flushing && space_info->flush) {
+ while (flush == BTRFS_RESERVE_FLUSH_ALL && !flushing &&
+ space_info->flush) {
spin_unlock(&space_info->lock);
/*
* If we have a trans handle we can't wait because the flusher
@@ -3981,23 +3993,40 @@ again:
* Couldn't make our reservation, save our place so while we're trying
* to reclaim space we can actually use it instead of somebody else
* stealing it from us.
+ *
+ * We make the other tasks wait for the flush only when we can flush
+ * all things.
*/
- if (ret && flush) {
+ if (ret && flush != BTRFS_RESERVE_NO_FLUSH) {
flushing = true;
space_info->flush = 1;
}
spin_unlock(&space_info->lock);
- if (!ret || !flush)
+ if (!ret || flush == BTRFS_RESERVE_NO_FLUSH)
goto out;
ret = flush_space(root, space_info, num_bytes, orig_bytes,
flush_state);
flush_state++;
+
+ /*
+ * If we are FLUSH_LIMIT, we can not flush delalloc, or the deadlock
+ * would happen. So skip delalloc flush.
+ */
+ if (flush == BTRFS_RESERVE_FLUSH_LIMIT &&
+ (flush_state == FLUSH_DELALLOC ||
+ flush_state == FLUSH_DELALLOC_WAIT))
+ flush_state = ALLOC_CHUNK;
+
if (!ret)
goto again;
- else if (flush_state <= COMMIT_TRANS)
+ else if (flush == BTRFS_RESERVE_FLUSH_LIMIT &&
+ flush_state < COMMIT_TRANS)
+ goto again;
+ else if (flush == BTRFS_RESERVE_FLUSH_ALL &&
+ flush_state <= COMMIT_TRANS)
goto again;
out:
@@ -4148,9 +4177,9 @@ void btrfs_free_block_rsv(struct btrfs_root *root,
kfree(rsv);
}
-static inline int __block_rsv_add(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 num_bytes, int flush)
+int btrfs_block_rsv_add(struct btrfs_root *root,
+ struct btrfs_block_rsv *block_rsv, u64 num_bytes,
+ enum btrfs_reserve_flush_enum flush)
{
int ret;
@@ -4166,20 +4195,6 @@ static inline int __block_rsv_add(struct btrfs_root *root,
return ret;
}
-int btrfs_block_rsv_add(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 num_bytes)
-{
- return __block_rsv_add(root, block_rsv, num_bytes, 1);
-}
-
-int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 num_bytes)
-{
- return __block_rsv_add(root, block_rsv, num_bytes, 0);
-}
-
int btrfs_block_rsv_check(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int min_factor)
{
@@ -4198,9 +4213,9 @@ int btrfs_block_rsv_check(struct btrfs_root *root,
return ret;
}
-static inline int __btrfs_block_rsv_refill(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 min_reserved, int flush)
+int btrfs_block_rsv_refill(struct btrfs_root *root,
+ struct btrfs_block_rsv *block_rsv, u64 min_reserved,
+ enum btrfs_reserve_flush_enum flush)
{
u64 num_bytes = 0;
int ret = -ENOSPC;
@@ -4228,20 +4243,6 @@ static inline int __btrfs_block_rsv_refill(struct btrfs_root *root,
return ret;
}
-int btrfs_block_rsv_refill(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 min_reserved)
-{
- return __btrfs_block_rsv_refill(root, block_rsv, min_reserved, 1);
-}
-
-int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
- struct btrfs_block_rsv *block_rsv,
- u64 min_reserved)
-{
- return __btrfs_block_rsv_refill(root, block_rsv, min_reserved, 0);
-}
-
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
struct btrfs_block_rsv *dst_rsv,
u64 num_bytes)
@@ -4532,17 +4533,27 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
u64 csum_bytes;
unsigned nr_extents = 0;
int extra_reserve = 0;
- int flush = 1;
+ enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_ALL;
int ret;
+ bool delalloc_lock = true;
- /* Need to be holding the i_mutex here if we aren't free space cache */
- if (btrfs_is_free_space_inode(inode))
- flush = 0;
+ /* If we are a free space inode we need to not flush since we will be in
+ * the middle of a transaction commit. We also don't need the delalloc
+ * mutex since we won't race with anybody. We need this mostly to make
+ * lockdep shut its filthy mouth.
+ */
+ if (btrfs_is_free_space_inode(inode)) {
+ flush = BTRFS_RESERVE_NO_FLUSH;
+ delalloc_lock = false;
+ }
- if (flush && btrfs_transaction_in_commit(root->fs_info))
+ if (flush != BTRFS_RESERVE_NO_FLUSH &&
+ btrfs_transaction_in_commit(root->fs_info))
schedule_timeout(1);
- mutex_lock(&BTRFS_I(inode)->delalloc_mutex);
+ if (delalloc_lock)
+ mutex_lock(&BTRFS_I(inode)->delalloc_mutex);
+
num_bytes = ALIGN(num_bytes, root->sectorsize);
spin_lock(&BTRFS_I(inode)->lock);
@@ -4572,7 +4583,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
ret = btrfs_qgroup_reserve(root, num_bytes +
nr_extents * root->leafsize);
if (ret) {
- mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
+ spin_lock(&BTRFS_I(inode)->lock);
+ calc_csum_metadata_size(inode, num_bytes, 0);
+ spin_unlock(&BTRFS_I(inode)->lock);
+ if (delalloc_lock)
+ mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
return ret;
}
}
@@ -4607,7 +4622,12 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
btrfs_ino(inode),
to_free, 0);
}
- mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
+ if (root->fs_info->quota_enabled) {
+ btrfs_qgroup_free(root, num_bytes +
+ nr_extents * root->leafsize);
+ }
+ if (delalloc_lock)
+ mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
return ret;
}
@@ -4619,7 +4639,9 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
}
BTRFS_I(inode)->reserved_extents += nr_extents;
spin_unlock(&BTRFS_I(inode)->lock);
- mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
+
+ if (delalloc_lock)
+ mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
if (to_reserve)
trace_btrfs_space_reservation(root->fs_info,"delalloc",
@@ -4969,9 +4991,13 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_block_group_cache *cache = NULL;
+ struct btrfs_space_info *space_info;
+ struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
u64 len;
+ bool readonly;
while (start <= end) {
+ readonly = false;
if (!cache ||
start >= cache->key.objectid + cache->key.offset) {
if (cache)
@@ -4989,15 +5015,30 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end)
}
start += len;
+ space_info = cache->space_info;
- spin_lock(&cache->space_info->lock);
+ spin_lock(&space_info->lock);
spin_lock(&cache->lock);
cache->pinned -= len;
- cache->space_info->bytes_pinned -= len;
- if (cache->ro)
- cache->space_info->bytes_readonly += len;
+ space_info->bytes_pinned -= len;
+ if (cache->ro) {
+ space_info->bytes_readonly += len;
+ readonly = true;
+ }
spin_unlock(&cache->lock);
- spin_unlock(&cache->space_info->lock);
+ if (!readonly && global_rsv->space_info == space_info) {
+ spin_lock(&global_rsv->lock);
+ if (!global_rsv->full) {
+ len = min(len, global_rsv->size -
+ global_rsv->reserved);
+ global_rsv->reserved += len;
+ space_info->bytes_may_use += len;
+ if (global_rsv->reserved >= global_rsv->size)
+ global_rsv->full = 1;
+ }
+ spin_unlock(&global_rsv->lock);
+ }
+ spin_unlock(&space_info->lock);
}
if (cache)
@@ -5466,7 +5507,7 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache)
return 0;
}
-static int __get_block_group_index(u64 flags)
+int __get_raid_index(u64 flags)
{
int index;
@@ -5486,7 +5527,7 @@ static int __get_block_group_index(u64 flags)
static int get_block_group_index(struct btrfs_block_group_cache *cache)
{
- return __get_block_group_index(cache->flags);
+ return __get_raid_index(cache->flags);
}
enum btrfs_loop_type {
@@ -5519,7 +5560,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
int empty_cluster = 2 * 1024 * 1024;
struct btrfs_space_info *space_info;
int loop = 0;
- int index = 0;
+ int index = __get_raid_index(data);
int alloc_type = (data & BTRFS_BLOCK_GROUP_DATA) ?
RESERVE_ALLOC_NO_ACCOUNT : RESERVE_ALLOC;
bool found_uncached_bg = false;
@@ -6269,7 +6310,8 @@ use_block_rsv(struct btrfs_trans_handle *trans,
block_rsv = get_block_rsv(trans, root);
if (block_rsv->size == 0) {
- ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0);
+ ret = reserve_metadata_bytes(root, block_rsv, blocksize,
+ BTRFS_RESERVE_NO_FLUSH);
/*
* If we couldn't reserve metadata bytes try and use some from
* the global reserve.
@@ -6292,11 +6334,11 @@ use_block_rsv(struct btrfs_trans_handle *trans,
static DEFINE_RATELIMIT_STATE(_rs,
DEFAULT_RATELIMIT_INTERVAL,
/*DEFAULT_RATELIMIT_BURST*/ 2);
- if (__ratelimit(&_rs)) {
- printk(KERN_DEBUG "btrfs: block rsv returned %d\n", ret);
- WARN_ON(1);
- }
- ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0);
+ if (__ratelimit(&_rs))
+ WARN(1, KERN_DEBUG "btrfs: block rsv returned %d\n",
+ ret);
+ ret = reserve_metadata_bytes(root, block_rsv, blocksize,
+ BTRFS_RESERVE_NO_FLUSH);
if (!ret) {
return block_rsv;
} else if (ret && block_rsv != global_rsv) {
@@ -6746,11 +6788,13 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
&wc->flags[level]);
if (ret < 0) {
btrfs_tree_unlock_rw(eb, path->locks[level]);
+ path->locks[level] = 0;
return ret;
}
BUG_ON(wc->refs[level] == 0);
if (wc->refs[level] == 1) {
btrfs_tree_unlock_rw(eb, path->locks[level]);
+ path->locks[level] = 0;
return 1;
}
}
@@ -7427,7 +7471,7 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
*/
target = get_restripe_target(root->fs_info, block_group->flags);
if (target) {
- index = __get_block_group_index(extended_to_chunk(target));
+ index = __get_raid_index(extended_to_chunk(target));
} else {
/*
* this is just a balance, so if we were marked as full
@@ -7461,7 +7505,8 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
* check to make sure we can actually find a chunk with enough
* space to fit our block group in.
*/
- if (device->total_bytes > device->bytes_used + min_free) {
+ if (device->total_bytes > device->bytes_used + min_free &&
+ !device->is_tgtdev_for_dev_replace) {
ret = find_free_dev_extent(device, min_free,
&dev_offset, NULL);
if (!ret)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 472873a94d96..1b319df29eee 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -341,12 +341,10 @@ static int insert_state(struct extent_io_tree *tree,
{
struct rb_node *node;
- if (end < start) {
- printk(KERN_ERR "btrfs end < start %llu %llu\n",
+ if (end < start)
+ WARN(1, KERN_ERR "btrfs end < start %llu %llu\n",
(unsigned long long)end,
(unsigned long long)start);
- WARN_ON(1);
- }
state->start = start;
state->end = end;
@@ -1919,12 +1917,12 @@ static void repair_io_failure_callback(struct bio *bio, int err)
* the standard behavior is to write all copies in a raid setup. here we only
* want to write the one bad copy. so we do the mapping for ourselves and issue
* submit_bio directly.
- * to avoid any synchonization issues, wait for the data after writing, which
+ * to avoid any synchronization issues, wait for the data after writing, which
* actually prevents the read that triggered the error from finishing.
* currently, there can be no more than two copies of every data bit. thus,
* exactly one rewrite is required.
*/
-int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
+int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start,
u64 length, u64 logical, struct page *page,
int mirror_num)
{
@@ -1946,7 +1944,7 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
bio->bi_size = 0;
map_length = length;
- ret = btrfs_map_block(map_tree, WRITE, logical,
+ ret = btrfs_map_block(fs_info, WRITE, logical,
&map_length, &bbio, mirror_num);
if (ret) {
bio_put(bio);
@@ -1984,14 +1982,13 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
int mirror_num)
{
- struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
u64 start = eb->start;
unsigned long i, num_pages = num_extent_pages(eb->start, eb->len);
int ret = 0;
for (i = 0; i < num_pages; i++) {
struct page *p = extent_buffer_page(eb, i);
- ret = repair_io_failure(map_tree, start, PAGE_CACHE_SIZE,
+ ret = repair_io_failure(root->fs_info, start, PAGE_CACHE_SIZE,
start, p, mirror_num);
if (ret)
break;
@@ -2010,7 +2007,7 @@ static int clean_io_failure(u64 start, struct page *page)
u64 private;
u64 private_failure;
struct io_failure_record *failrec;
- struct btrfs_mapping_tree *map_tree;
+ struct btrfs_fs_info *fs_info;
struct extent_state *state;
int num_copies;
int did_repair = 0;
@@ -2046,11 +2043,11 @@ static int clean_io_failure(u64 start, struct page *page)
spin_unlock(&BTRFS_I(inode)->io_tree.lock);
if (state && state->start == failrec->start) {
- map_tree = &BTRFS_I(inode)->root->fs_info->mapping_tree;
- num_copies = btrfs_num_copies(map_tree, failrec->logical,
- failrec->len);
+ fs_info = BTRFS_I(inode)->root->fs_info;
+ num_copies = btrfs_num_copies(fs_info, failrec->logical,
+ failrec->len);
if (num_copies > 1) {
- ret = repair_io_failure(map_tree, start, failrec->len,
+ ret = repair_io_failure(fs_info, start, failrec->len,
failrec->logical, page,
failrec->failed_mirror);
did_repair = !ret;
@@ -2159,9 +2156,8 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page,
* clean_io_failure() clean all those errors at once.
*/
}
- num_copies = btrfs_num_copies(
- &BTRFS_I(inode)->root->fs_info->mapping_tree,
- failrec->logical, failrec->len);
+ num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info,
+ failrec->logical, failrec->len);
if (num_copies == 1) {
/*
* we only have a single copy of the data, so don't bother with
@@ -2466,10 +2462,6 @@ btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
return bio;
}
-/*
- * Since writes are async, they will only return -ENOMEM.
- * Reads can return the full range of I/O error conditions.
- */
static int __must_check submit_one_bio(int rw, struct bio *bio,
int mirror_num, unsigned long bio_flags)
{
@@ -4721,10 +4713,9 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
}
if (start + min_len > eb->len) {
- printk(KERN_ERR "btrfs bad mapping eb start %llu len %lu, "
+ WARN(1, KERN_ERR "btrfs bad mapping eb start %llu len %lu, "
"wanted %lu %lu\n", (unsigned long long)eb->start,
eb->len, start, min_len);
- WARN_ON(1);
return -EINVAL;
}
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 711d12b80028..2eacfabd3263 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -337,9 +337,9 @@ struct bio *
btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
gfp_t gfp_flags);
-struct btrfs_mapping_tree;
+struct btrfs_fs_info;
-int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
+int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start,
u64 length, u64 logical, struct page *page,
int mirror_num);
int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index ce9f79216723..2e8cae63d247 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -49,7 +49,7 @@ void extent_map_tree_init(struct extent_map_tree *tree)
struct extent_map *alloc_extent_map(void)
{
struct extent_map *em;
- em = kmem_cache_alloc(extent_map_cache, GFP_NOFS);
+ em = kmem_cache_zalloc(extent_map_cache, GFP_NOFS);
if (!em)
return NULL;
em->in_tree = 0;
@@ -171,6 +171,10 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next)
if (test_bit(EXTENT_FLAG_COMPRESSED, &prev->flags))
return 0;
+ if (test_bit(EXTENT_FLAG_LOGGING, &prev->flags) ||
+ test_bit(EXTENT_FLAG_LOGGING, &next->flags))
+ return 0;
+
if (extent_map_end(prev) == next->start &&
prev->flags == next->flags &&
prev->bdev == next->bdev &&
@@ -198,16 +202,15 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
merge = rb_entry(rb, struct extent_map, rb_node);
if (rb && mergable_maps(merge, em)) {
em->start = merge->start;
+ em->orig_start = merge->orig_start;
em->len += merge->len;
em->block_len += merge->block_len;
em->block_start = merge->block_start;
merge->in_tree = 0;
- if (merge->generation > em->generation) {
- em->mod_start = em->start;
- em->mod_len = em->len;
- em->generation = merge->generation;
- list_move(&em->list, &tree->modified_extents);
- }
+ em->mod_len = (em->mod_len + em->mod_start) - merge->mod_start;
+ em->mod_start = merge->mod_start;
+ em->generation = max(em->generation, merge->generation);
+ list_move(&em->list, &tree->modified_extents);
list_del_init(&merge->list);
rb_erase(&merge->rb_node, &tree->map);
@@ -223,11 +226,8 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
em->block_len += merge->len;
rb_erase(&merge->rb_node, &tree->map);
merge->in_tree = 0;
- if (merge->generation > em->generation) {
- em->mod_len = em->len;
- em->generation = merge->generation;
- list_move(&em->list, &tree->modified_extents);
- }
+ em->mod_len = (merge->mod_start + merge->mod_len) - em->mod_start;
+ em->generation = max(em->generation, merge->generation);
list_del_init(&merge->list);
free_extent_map(merge);
}
@@ -259,15 +259,16 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
if (!em)
goto out;
- list_move(&em->list, &tree->modified_extents);
+ if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags))
+ list_move(&em->list, &tree->modified_extents);
em->generation = gen;
clear_bit(EXTENT_FLAG_PINNED, &em->flags);
em->mod_start = em->start;
em->mod_len = em->len;
- if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
+ if (test_bit(EXTENT_FLAG_FILLING, &em->flags)) {
prealloc = true;
- clear_bit(EXTENT_FLAG_PREALLOC, &em->flags);
+ clear_bit(EXTENT_FLAG_FILLING, &em->flags);
}
try_merge_map(tree, em);
@@ -284,6 +285,12 @@ out:
}
+void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em)
+{
+ clear_bit(EXTENT_FLAG_LOGGING, &em->flags);
+ try_merge_map(tree, em);
+}
+
/**
* add_extent_mapping - add new extent map to the extent tree
* @tree: tree to insert new map in
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 679225555f7b..c6598c89cff8 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -14,6 +14,7 @@
#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */
#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */
+#define EXTENT_FLAG_FILLING 5 /* Filling in a preallocated extent */
struct extent_map {
struct rb_node rb_node;
@@ -24,6 +25,7 @@ struct extent_map {
u64 mod_start;
u64 mod_len;
u64 orig_start;
+ u64 orig_block_len;
u64 block_start;
u64 block_len;
u64 generation;
@@ -67,6 +69,7 @@ void free_extent_map(struct extent_map *em);
int __init extent_map_init(void);
void extent_map_exit(void);
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
+void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em);
struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
u64 start, u64 len);
#endif
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 1ad08e4e4a15..94aa53b38721 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -133,7 +133,6 @@ fail:
return ERR_PTR(ret);
}
-
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, u64 objectid,
@@ -151,6 +150,26 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
return ret;
}
+u64 btrfs_file_extent_length(struct btrfs_path *path)
+{
+ int extent_type;
+ struct btrfs_file_extent_item *fi;
+ u64 len;
+
+ fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_file_extent_item);
+ extent_type = btrfs_file_extent_type(path->nodes[0], fi);
+
+ if (extent_type == BTRFS_FILE_EXTENT_REG ||
+ extent_type == BTRFS_FILE_EXTENT_PREALLOC)
+ len = btrfs_file_extent_num_bytes(path->nodes[0], fi);
+ else if (extent_type == BTRFS_FILE_EXTENT_INLINE)
+ len = btrfs_file_extent_inline_len(path->nodes[0], fi);
+ else
+ BUG();
+
+ return len;
+}
static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
struct inode *inode, struct bio *bio,
@@ -441,8 +460,8 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
if (!contig)
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
- if (!contig && (offset >= ordered->file_offset + ordered->len ||
- offset < ordered->file_offset)) {
+ if (offset >= ordered->file_offset + ordered->len ||
+ offset < ordered->file_offset) {
unsigned long bytes_left;
sums->len = this_sum_bytes;
this_sum_bytes = 0;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 9ab1bed88116..f76b1fd160d4 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -41,6 +41,7 @@
#include "compat.h"
#include "volumes.h"
+static struct kmem_cache *btrfs_inode_defrag_cachep;
/*
* when auto defrag is enabled we
* queue up these defrag structs to remember which
@@ -90,7 +91,7 @@ static int __compare_inode_defrag(struct inode_defrag *defrag1,
* If an existing record is found the defrag item you
* pass in is freed
*/
-static void __btrfs_add_inode_defrag(struct inode *inode,
+static int __btrfs_add_inode_defrag(struct inode *inode,
struct inode_defrag *defrag)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -118,18 +119,24 @@ static void __btrfs_add_inode_defrag(struct inode *inode,
entry->transid = defrag->transid;
if (defrag->last_offset > entry->last_offset)
entry->last_offset = defrag->last_offset;
- goto exists;
+ return -EEXIST;
}
}
set_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags);
rb_link_node(&defrag->rb_node, parent, p);
rb_insert_color(&defrag->rb_node, &root->fs_info->defrag_inodes);
- return;
+ return 0;
+}
-exists:
- kfree(defrag);
- return;
+static inline int __need_auto_defrag(struct btrfs_root *root)
+{
+ if (!btrfs_test_opt(root, AUTO_DEFRAG))
+ return 0;
+
+ if (btrfs_fs_closing(root->fs_info))
+ return 0;
+ return 1;
}
/*
@@ -142,11 +149,9 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
struct btrfs_root *root = BTRFS_I(inode)->root;
struct inode_defrag *defrag;
u64 transid;
+ int ret;
- if (!btrfs_test_opt(root, AUTO_DEFRAG))
- return 0;
-
- if (btrfs_fs_closing(root->fs_info))
+ if (!__need_auto_defrag(root))
return 0;
if (test_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags))
@@ -157,7 +162,7 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
else
transid = BTRFS_I(inode)->root->last_trans;
- defrag = kzalloc(sizeof(*defrag), GFP_NOFS);
+ defrag = kmem_cache_zalloc(btrfs_inode_defrag_cachep, GFP_NOFS);
if (!defrag)
return -ENOMEM;
@@ -166,20 +171,56 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
defrag->root = root->root_key.objectid;
spin_lock(&root->fs_info->defrag_inodes_lock);
- if (!test_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags))
- __btrfs_add_inode_defrag(inode, defrag);
- else
- kfree(defrag);
+ if (!test_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags)) {
+ /*
+ * If we set IN_DEFRAG flag and evict the inode from memory,
+ * and then re-read this inode, this new inode doesn't have
+ * IN_DEFRAG flag. At the case, we may find the existed defrag.
+ */
+ ret = __btrfs_add_inode_defrag(inode, defrag);
+ if (ret)
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+ } else {
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+ }
spin_unlock(&root->fs_info->defrag_inodes_lock);
return 0;
}
/*
- * must be called with the defrag_inodes lock held
+ * Requeue the defrag object. If there is a defrag object that points to
+ * the same inode in the tree, we will merge them together (by
+ * __btrfs_add_inode_defrag()) and free the one that we want to requeue.
+ */
+void btrfs_requeue_inode_defrag(struct inode *inode,
+ struct inode_defrag *defrag)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ int ret;
+
+ if (!__need_auto_defrag(root))
+ goto out;
+
+ /*
+ * Here we don't check the IN_DEFRAG flag, because we need merge
+ * them together.
+ */
+ spin_lock(&root->fs_info->defrag_inodes_lock);
+ ret = __btrfs_add_inode_defrag(inode, defrag);
+ spin_unlock(&root->fs_info->defrag_inodes_lock);
+ if (ret)
+ goto out;
+ return;
+out:
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+}
+
+/*
+ * pick the defragable inode that we want, if it doesn't exist, we will get
+ * the next one.
*/
-struct inode_defrag *btrfs_find_defrag_inode(struct btrfs_fs_info *info,
- u64 root, u64 ino,
- struct rb_node **next)
+static struct inode_defrag *
+btrfs_pick_defrag_inode(struct btrfs_fs_info *fs_info, u64 root, u64 ino)
{
struct inode_defrag *entry = NULL;
struct inode_defrag tmp;
@@ -190,7 +231,8 @@ struct inode_defrag *btrfs_find_defrag_inode(struct btrfs_fs_info *info,
tmp.ino = ino;
tmp.root = root;
- p = info->defrag_inodes.rb_node;
+ spin_lock(&fs_info->defrag_inodes_lock);
+ p = fs_info->defrag_inodes.rb_node;
while (p) {
parent = p;
entry = rb_entry(parent, struct inode_defrag, rb_node);
@@ -201,52 +243,131 @@ struct inode_defrag *btrfs_find_defrag_inode(struct btrfs_fs_info *info,
else if (ret > 0)
p = parent->rb_right;
else
- return entry;
+ goto out;
}
- if (next) {
- while (parent && __compare_inode_defrag(&tmp, entry) > 0) {
- parent = rb_next(parent);
+ if (parent && __compare_inode_defrag(&tmp, entry) > 0) {
+ parent = rb_next(parent);
+ if (parent)
entry = rb_entry(parent, struct inode_defrag, rb_node);
- }
- *next = parent;
+ else
+ entry = NULL;
}
- return NULL;
+out:
+ if (entry)
+ rb_erase(parent, &fs_info->defrag_inodes);
+ spin_unlock(&fs_info->defrag_inodes_lock);
+ return entry;
}
-/*
- * run through the list of inodes in the FS that need
- * defragging
- */
-int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info)
+void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info)
{
struct inode_defrag *defrag;
+ struct rb_node *node;
+
+ spin_lock(&fs_info->defrag_inodes_lock);
+ node = rb_first(&fs_info->defrag_inodes);
+ while (node) {
+ rb_erase(node, &fs_info->defrag_inodes);
+ defrag = rb_entry(node, struct inode_defrag, rb_node);
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+
+ if (need_resched()) {
+ spin_unlock(&fs_info->defrag_inodes_lock);
+ cond_resched();
+ spin_lock(&fs_info->defrag_inodes_lock);
+ }
+
+ node = rb_first(&fs_info->defrag_inodes);
+ }
+ spin_unlock(&fs_info->defrag_inodes_lock);
+}
+
+#define BTRFS_DEFRAG_BATCH 1024
+
+static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info,
+ struct inode_defrag *defrag)
+{
struct btrfs_root *inode_root;
struct inode *inode;
- struct rb_node *n;
struct btrfs_key key;
struct btrfs_ioctl_defrag_range_args range;
- u64 first_ino = 0;
- u64 root_objectid = 0;
int num_defrag;
- int defrag_batch = 1024;
+ /* get the inode */
+ key.objectid = defrag->root;
+ btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
+ key.offset = (u64)-1;
+ inode_root = btrfs_read_fs_root_no_name(fs_info, &key);
+ if (IS_ERR(inode_root)) {
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+ return PTR_ERR(inode_root);
+ }
+
+ key.objectid = defrag->ino;
+ btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
+ key.offset = 0;
+ inode = btrfs_iget(fs_info->sb, &key, inode_root, NULL);
+ if (IS_ERR(inode)) {
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+ return PTR_ERR(inode);
+ }
+
+ /* do a chunk of defrag */
+ clear_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags);
memset(&range, 0, sizeof(range));
range.len = (u64)-1;
+ range.start = defrag->last_offset;
+
+ sb_start_write(fs_info->sb);
+ num_defrag = btrfs_defrag_file(inode, NULL, &range, defrag->transid,
+ BTRFS_DEFRAG_BATCH);
+ sb_end_write(fs_info->sb);
+ /*
+ * if we filled the whole defrag batch, there
+ * must be more work to do. Queue this defrag
+ * again
+ */
+ if (num_defrag == BTRFS_DEFRAG_BATCH) {
+ defrag->last_offset = range.start;
+ btrfs_requeue_inode_defrag(inode, defrag);
+ } else if (defrag->last_offset && !defrag->cycled) {
+ /*
+ * we didn't fill our defrag batch, but
+ * we didn't start at zero. Make sure we loop
+ * around to the start of the file.
+ */
+ defrag->last_offset = 0;
+ defrag->cycled = 1;
+ btrfs_requeue_inode_defrag(inode, defrag);
+ } else {
+ kmem_cache_free(btrfs_inode_defrag_cachep, defrag);
+ }
+
+ iput(inode);
+ return 0;
+}
+
+/*
+ * run through the list of inodes in the FS that need
+ * defragging
+ */
+int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info)
+{
+ struct inode_defrag *defrag;
+ u64 first_ino = 0;
+ u64 root_objectid = 0;
atomic_inc(&fs_info->defrag_running);
- spin_lock(&fs_info->defrag_inodes_lock);
while(1) {
- n = NULL;
+ if (!__need_auto_defrag(fs_info->tree_root))
+ break;
/* find an inode to defrag */
- defrag = btrfs_find_defrag_inode(fs_info, root_objectid,
- first_ino, &n);
+ defrag = btrfs_pick_defrag_inode(fs_info, root_objectid,
+ first_ino);
if (!defrag) {
- if (n) {
- defrag = rb_entry(n, struct inode_defrag,
- rb_node);
- } else if (root_objectid || first_ino) {
+ if (root_objectid || first_ino) {
root_objectid = 0;
first_ino = 0;
continue;
@@ -255,70 +376,11 @@ int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info)
}
}
- /* remove it from the rbtree */
first_ino = defrag->ino + 1;
root_objectid = defrag->root;
- rb_erase(&defrag->rb_node, &fs_info->defrag_inodes);
-
- if (btrfs_fs_closing(fs_info))
- goto next_free;
-
- spin_unlock(&fs_info->defrag_inodes_lock);
-
- /* get the inode */
- key.objectid = defrag->root;
- btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
- key.offset = (u64)-1;
- inode_root = btrfs_read_fs_root_no_name(fs_info, &key);
- if (IS_ERR(inode_root))
- goto next;
-
- key.objectid = defrag->ino;
- btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
- key.offset = 0;
-
- inode = btrfs_iget(fs_info->sb, &key, inode_root, NULL);
- if (IS_ERR(inode))
- goto next;
-
- /* do a chunk of defrag */
- clear_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags);
- range.start = defrag->last_offset;
- num_defrag = btrfs_defrag_file(inode, NULL, &range, defrag->transid,
- defrag_batch);
- /*
- * if we filled the whole defrag batch, there
- * must be more work to do. Queue this defrag
- * again
- */
- if (num_defrag == defrag_batch) {
- defrag->last_offset = range.start;
- __btrfs_add_inode_defrag(inode, defrag);
- /*
- * we don't want to kfree defrag, we added it back to
- * the rbtree
- */
- defrag = NULL;
- } else if (defrag->last_offset && !defrag->cycled) {
- /*
- * we didn't fill our defrag batch, but
- * we didn't start at zero. Make sure we loop
- * around to the start of the file.
- */
- defrag->last_offset = 0;
- defrag->cycled = 1;
- __btrfs_add_inode_defrag(inode, defrag);
- defrag = NULL;
- }
- iput(inode);
-next:
- spin_lock(&fs_info->defrag_inodes_lock);
-next_free:
- kfree(defrag);
+ __btrfs_run_defrag_inode(fs_info, defrag);
}
- spin_unlock(&fs_info->defrag_inodes_lock);
-
atomic_dec(&fs_info->defrag_running);
/*
@@ -526,6 +588,8 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split->block_len = em->block_len;
else
split->block_len = split->len;
+ split->orig_block_len = max(split->block_len,
+ em->orig_block_len);
split->generation = gen;
split->bdev = em->bdev;
split->flags = flags;
@@ -547,6 +611,8 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split->flags = flags;
split->compress_type = em->compress_type;
split->generation = gen;
+ split->orig_block_len = max(em->block_len,
+ em->orig_block_len);
if (compressed) {
split->block_len = em->block_len;
@@ -555,7 +621,7 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
} else {
split->block_len = split->len;
split->block_start = em->block_start + diff;
- split->orig_start = split->start;
+ split->orig_start = em->orig_start;
}
ret = add_extent_mapping(em_tree, split);
@@ -1346,10 +1412,9 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
cond_resched();
- balance_dirty_pages_ratelimited_nr(inode->i_mapping,
- dirty_pages);
+ balance_dirty_pages_ratelimited(inode->i_mapping);
if (dirty_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1)
- btrfs_btree_balance_dirty(root, 1);
+ btrfs_btree_balance_dirty(root);
pos += copied;
num_written += copied;
@@ -1398,6 +1463,24 @@ out:
return written ? written : err;
}
+static void update_time_for_write(struct inode *inode)
+{
+ struct timespec now;
+
+ if (IS_NOCMTIME(inode))
+ return;
+
+ now = current_fs_time(inode->i_sb);
+ if (!timespec_equal(&inode->i_mtime, &now))
+ inode->i_mtime = now;
+
+ if (!timespec_equal(&inode->i_ctime, &now))
+ inode->i_ctime = now;
+
+ if (IS_I_VERSION(inode))
+ inode_inc_iversion(inode);
+}
+
static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
@@ -1410,6 +1493,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
ssize_t num_written = 0;
ssize_t err = 0;
size_t count, ocount;
+ bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host);
sb_start_write(inode->i_sb);
@@ -1452,11 +1536,13 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
goto out;
}
- err = file_update_time(file);
- if (err) {
- mutex_unlock(&inode->i_mutex);
- goto out;
- }
+ /*
+ * We reserve space for updating the inode when we reserve space for the
+ * extent we are going to write, so we will enospc out there. We don't
+ * need to start yet another transaction to update the inode as we will
+ * update the inode when we finish writing whatever data we write.
+ */
+ update_time_for_write(inode);
start_pos = round_down(pos, root->sectorsize);
if (start_pos > i_size_read(inode)) {
@@ -1467,6 +1553,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
}
}
+ if (sync)
+ atomic_inc(&BTRFS_I(inode)->sync_writers);
+
if (unlikely(file->f_flags & O_DIRECT)) {
num_written = __btrfs_direct_write(iocb, iov, nr_segs,
pos, ppos, count, ocount);
@@ -1493,14 +1582,21 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
* this will either be one more than the running transaction
* or the generation used for the next transaction if there isn't
* one running right now.
+ *
+ * We also have to set last_sub_trans to the current log transid,
+ * otherwise subsequent syncs to a file that's been synced in this
+ * transaction will appear to have already occured.
*/
BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
+ BTRFS_I(inode)->last_sub_trans = root->log_transid;
if (num_written > 0 || num_written == -EIOCBQUEUED) {
err = generic_write_sync(file, pos, num_written);
if (err < 0 && num_written > 0)
num_written = err;
}
out:
+ if (sync)
+ atomic_dec(&BTRFS_I(inode)->sync_writers);
sb_end_write(inode->i_sb);
current->backing_dev_info = NULL;
return num_written ? num_written : err;
@@ -1551,7 +1647,9 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
* out of the ->i_mutex. If so, we can flush the dirty pages by
* multi-task, and make the performance up.
*/
+ atomic_inc(&BTRFS_I(inode)->sync_writers);
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ atomic_dec(&BTRFS_I(inode)->sync_writers);
if (ret)
return ret;
@@ -1562,7 +1660,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
* range being left.
*/
atomic_inc(&root->log_batch);
- btrfs_wait_ordered_range(inode, start, end);
+ btrfs_wait_ordered_range(inode, start, end - start + 1);
atomic_inc(&root->log_batch);
/*
@@ -1768,6 +1866,7 @@ out:
hole_em->block_start = EXTENT_MAP_HOLE;
hole_em->block_len = 0;
+ hole_em->orig_block_len = 0;
hole_em->bdev = root->fs_info->fs_devices->latest_bdev;
hole_em->compress_type = BTRFS_COMPRESS_NONE;
hole_em->generation = trans->transid;
@@ -1797,48 +1896,51 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
struct btrfs_path *path;
struct btrfs_block_rsv *rsv;
struct btrfs_trans_handle *trans;
- u64 mask = BTRFS_I(inode)->root->sectorsize - 1;
- u64 lockstart = (offset + mask) & ~mask;
- u64 lockend = ((offset + len) & ~mask) - 1;
+ u64 lockstart = round_up(offset, BTRFS_I(inode)->root->sectorsize);
+ u64 lockend = round_down(offset + len,
+ BTRFS_I(inode)->root->sectorsize) - 1;
u64 cur_offset = lockstart;
u64 min_size = btrfs_calc_trunc_metadata_size(root, 1);
u64 drop_end;
- unsigned long nr;
int ret = 0;
int err = 0;
- bool same_page = (offset >> PAGE_CACHE_SHIFT) ==
- ((offset + len) >> PAGE_CACHE_SHIFT);
+ bool same_page = ((offset >> PAGE_CACHE_SHIFT) ==
+ ((offset + len - 1) >> PAGE_CACHE_SHIFT));
btrfs_wait_ordered_range(inode, offset, len);
mutex_lock(&inode->i_mutex);
- if (offset >= inode->i_size) {
- mutex_unlock(&inode->i_mutex);
- return 0;
- }
-
+ /*
+ * We needn't truncate any page which is beyond the end of the file
+ * because we are sure there is no data there.
+ */
/*
* Only do this if we are in the same page and we aren't doing the
* entire page.
*/
if (same_page && len < PAGE_CACHE_SIZE) {
- ret = btrfs_truncate_page(inode, offset, len, 0);
+ if (offset < round_up(inode->i_size, PAGE_CACHE_SIZE))
+ ret = btrfs_truncate_page(inode, offset, len, 0);
mutex_unlock(&inode->i_mutex);
return ret;
}
/* zero back part of the first page */
- ret = btrfs_truncate_page(inode, offset, 0, 0);
- if (ret) {
- mutex_unlock(&inode->i_mutex);
- return ret;
+ if (offset < round_up(inode->i_size, PAGE_CACHE_SIZE)) {
+ ret = btrfs_truncate_page(inode, offset, 0, 0);
+ if (ret) {
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+ }
}
/* zero the front end of the last page */
- ret = btrfs_truncate_page(inode, offset + len, 0, 1);
- if (ret) {
- mutex_unlock(&inode->i_mutex);
- return ret;
+ if (offset + len < round_up(inode->i_size, PAGE_CACHE_SIZE)) {
+ ret = btrfs_truncate_page(inode, offset + len, 0, 1);
+ if (ret) {
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+ }
}
if (lockend < lockstart) {
@@ -1931,9 +2033,8 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
break;
}
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
trans = btrfs_start_transaction(root, 3);
if (IS_ERR(trans)) {
@@ -1964,11 +2065,13 @@ out_trans:
if (!trans)
goto out_free;
+ inode_inc_iversion(inode);
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
out_free:
btrfs_free_path(path);
btrfs_free_block_rsv(root, rsv);
@@ -1992,12 +2095,12 @@ static long btrfs_fallocate(struct file *file, int mode,
u64 alloc_end;
u64 alloc_hint = 0;
u64 locked_end;
- u64 mask = BTRFS_I(inode)->root->sectorsize - 1;
struct extent_map *em;
+ int blocksize = BTRFS_I(inode)->root->sectorsize;
int ret;
- alloc_start = offset & ~mask;
- alloc_end = (offset + len + mask) & ~mask;
+ alloc_start = round_down(offset, blocksize);
+ alloc_end = round_up(offset + len, blocksize);
/* Make sure we aren't being give some crap mode */
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
@@ -2010,7 +2113,7 @@ static long btrfs_fallocate(struct file *file, int mode,
* Make sure we have enough space before we do the
* allocation.
*/
- ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start + 1);
+ ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start);
if (ret)
return ret;
@@ -2078,7 +2181,7 @@ static long btrfs_fallocate(struct file *file, int mode,
}
last_byte = min(extent_map_end(em), alloc_end);
actual_end = min_t(u64, extent_map_end(em), offset + len);
- last_byte = (last_byte + mask) & ~mask;
+ last_byte = ALIGN(last_byte, blocksize);
if (em->block_start == EXTENT_MAP_HOLE ||
(cur_offset >= inode->i_size &&
@@ -2117,11 +2220,11 @@ static long btrfs_fallocate(struct file *file, int mode,
out:
mutex_unlock(&inode->i_mutex);
/* Let go of our reservation. */
- btrfs_free_reserved_data_space(inode, alloc_end - alloc_start + 1);
+ btrfs_free_reserved_data_space(inode, alloc_end - alloc_start);
return ret;
}
-static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
+static int find_desired_extent(struct inode *inode, loff_t *offset, int whence)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_map *em;
@@ -2138,6 +2241,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
if (lockend <= lockstart)
lockend = lockstart + root->sectorsize;
+ lockend--;
len = lockend - lockstart + 1;
len = max_t(u64, len, root->sectorsize);
@@ -2155,7 +2259,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
* before the position we want in case there is outstanding delalloc
* going on here.
*/
- if (origin == SEEK_HOLE && start != 0) {
+ if (whence == SEEK_HOLE && start != 0) {
if (start <= root->sectorsize)
em = btrfs_get_extent_fiemap(inode, NULL, 0, 0,
root->sectorsize, 0);
@@ -2189,13 +2293,13 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
}
}
- if (origin == SEEK_HOLE) {
+ if (whence == SEEK_HOLE) {
*offset = start;
free_extent_map(em);
break;
}
} else {
- if (origin == SEEK_DATA) {
+ if (whence == SEEK_DATA) {
if (em->block_start == EXTENT_MAP_DELALLOC) {
if (start >= inode->i_size) {
free_extent_map(em);
@@ -2204,9 +2308,12 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
}
}
- *offset = start;
- free_extent_map(em);
- break;
+ if (!test_bit(EXTENT_FLAG_PREALLOC,
+ &em->flags)) {
+ *offset = start;
+ free_extent_map(em);
+ break;
+ }
}
}
@@ -2232,16 +2339,16 @@ out:
return ret;
}
-static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin)
+static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
int ret;
mutex_lock(&inode->i_mutex);
- switch (origin) {
+ switch (whence) {
case SEEK_END:
case SEEK_CUR:
- offset = generic_file_llseek(file, offset, origin);
+ offset = generic_file_llseek(file, offset, whence);
goto out;
case SEEK_DATA:
case SEEK_HOLE:
@@ -2250,7 +2357,7 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin)
return -ENXIO;
}
- ret = find_desired_extent(inode, &offset, origin);
+ ret = find_desired_extent(inode, &offset, whence);
if (ret) {
mutex_unlock(&inode->i_mutex);
return ret;
@@ -2293,3 +2400,21 @@ const struct file_operations btrfs_file_operations = {
.compat_ioctl = btrfs_ioctl,
#endif
};
+
+void btrfs_auto_defrag_exit(void)
+{
+ if (btrfs_inode_defrag_cachep)
+ kmem_cache_destroy(btrfs_inode_defrag_cachep);
+}
+
+int btrfs_auto_defrag_init(void)
+{
+ btrfs_inode_defrag_cachep = kmem_cache_create("btrfs_inode_defrag",
+ sizeof(struct inode_defrag), 0,
+ SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
+ NULL);
+ if (!btrfs_inode_defrag_cachep)
+ return -ENOMEM;
+
+ return 0;
+}
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 1027b854b90c..0be7a8742a43 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -307,7 +307,6 @@ static void io_ctl_unmap_page(struct io_ctl *io_ctl)
static void io_ctl_map_page(struct io_ctl *io_ctl, int clear)
{
- WARN_ON(io_ctl->cur);
BUG_ON(io_ctl->index >= io_ctl->num_pages);
io_ctl->page = io_ctl->pages[io_ctl->index++];
io_ctl->cur = kmap(io_ctl->page);
@@ -1250,18 +1249,13 @@ tree_search_offset(struct btrfs_free_space_ctl *ctl,
* if previous extent entry covers the offset,
* we should return it instead of the bitmap entry
*/
- n = &entry->offset_index;
- while (1) {
- n = rb_prev(n);
- if (!n)
- break;
+ n = rb_prev(&entry->offset_index);
+ if (n) {
prev = rb_entry(n, struct btrfs_free_space,
offset_index);
- if (!prev->bitmap) {
- if (prev->offset + prev->bytes > offset)
- entry = prev;
- break;
- }
+ if (!prev->bitmap &&
+ prev->offset + prev->bytes > offset)
+ entry = prev;
}
}
return entry;
@@ -1287,18 +1281,13 @@ tree_search_offset(struct btrfs_free_space_ctl *ctl,
}
if (entry->bitmap) {
- n = &entry->offset_index;
- while (1) {
- n = rb_prev(n);
- if (!n)
- break;
+ n = rb_prev(&entry->offset_index);
+ if (n) {
prev = rb_entry(n, struct btrfs_free_space,
offset_index);
- if (!prev->bitmap) {
- if (prev->offset + prev->bytes > offset)
- return prev;
- break;
- }
+ if (!prev->bitmap &&
+ prev->offset + prev->bytes > offset)
+ return prev;
}
if (entry->offset + BITS_PER_BITMAP * ctl->unit > offset)
return entry;
@@ -1364,7 +1353,7 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
u64 bitmap_bytes;
u64 extent_bytes;
u64 size = block_group->key.offset;
- u64 bytes_per_bg = BITS_PER_BITMAP * block_group->sectorsize;
+ u64 bytes_per_bg = BITS_PER_BITMAP * ctl->unit;
int max_bitmaps = div64_u64(size + bytes_per_bg - 1, bytes_per_bg);
BUG_ON(ctl->total_bitmaps > max_bitmaps);
@@ -1650,8 +1639,7 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl,
* some block groups are so tiny they can't be enveloped by a bitmap, so
* don't even bother to create a bitmap for this
*/
- if (BITS_PER_BITMAP * block_group->sectorsize >
- block_group->key.offset)
+ if (BITS_PER_BITMAP * ctl->unit > block_group->key.offset)
return false;
return true;
@@ -1874,11 +1862,13 @@ int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct btrfs_free_space *info;
- int ret = 0;
+ int ret;
+ bool re_search = false;
spin_lock(&ctl->tree_lock);
again:
+ ret = 0;
if (!bytes)
goto out_lock;
@@ -1891,17 +1881,17 @@ again:
info = tree_search_offset(ctl, offset_to_bitmap(ctl, offset),
1, 0);
if (!info) {
- /* the tree logging code might be calling us before we
- * have fully loaded the free space rbtree for this
- * block group. So it is possible the entry won't
- * be in the rbtree yet at all. The caching code
- * will make sure not to put it in the rbtree if
- * the logging code has pinned it.
+ /*
+ * If we found a partial bit of our free space in a
+ * bitmap but then couldn't find the other part this may
+ * be a problem, so WARN about it.
*/
+ WARN_ON(re_search);
goto out_lock;
}
}
+ re_search = false;
if (!info->bitmap) {
unlink_free_space(ctl, info);
if (offset == info->offset) {
@@ -1947,8 +1937,10 @@ again:
}
ret = remove_from_bitmap(ctl, info, &offset, &bytes);
- if (ret == -EAGAIN)
+ if (ret == -EAGAIN) {
+ re_search = true;
goto again;
+ }
BUG_ON(ret); /* logic error */
out_lock:
spin_unlock(&ctl->tree_lock);
@@ -2298,10 +2290,10 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
unsigned long total_found = 0;
int ret;
- i = offset_to_bit(entry->offset, block_group->sectorsize,
+ i = offset_to_bit(entry->offset, ctl->unit,
max_t(u64, offset, entry->offset));
- want_bits = bytes_to_bits(bytes, block_group->sectorsize);
- min_bits = bytes_to_bits(min_bytes, block_group->sectorsize);
+ want_bits = bytes_to_bits(bytes, ctl->unit);
+ min_bits = bytes_to_bits(min_bytes, ctl->unit);
again:
found_bits = 0;
@@ -2325,23 +2317,22 @@ again:
total_found += found_bits;
- if (cluster->max_size < found_bits * block_group->sectorsize)
- cluster->max_size = found_bits * block_group->sectorsize;
+ if (cluster->max_size < found_bits * ctl->unit)
+ cluster->max_size = found_bits * ctl->unit;
if (total_found < want_bits || cluster->max_size < cont1_bytes) {
i = next_zero + 1;
goto again;
}
- cluster->window_start = start * block_group->sectorsize +
- entry->offset;
+ cluster->window_start = start * ctl->unit + entry->offset;
rb_erase(&entry->offset_index, &ctl->free_space_offset);
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 1);
BUG_ON(ret); /* -EEXIST; Logic error */
trace_btrfs_setup_cluster(block_group, cluster,
- total_found * block_group->sectorsize, 1);
+ total_found * ctl->unit, 1);
return 0;
}
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index b1a1c929ba80..d26f67a59e36 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -434,8 +434,9 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
* 3 items for pre-allocation
*/
trans->bytes_reserved = btrfs_calc_trans_metadata_size(root, 8);
- ret = btrfs_block_rsv_add_noflush(root, trans->block_rsv,
- trans->bytes_reserved);
+ ret = btrfs_block_rsv_add(root, trans->block_rsv,
+ trans->bytes_reserved,
+ BTRFS_RESERVE_NO_FLUSH);
if (ret)
goto out;
trace_btrfs_space_reservation(root->fs_info, "ino_cache",
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 95542a1b3dfc..cc93b23ca352 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -71,6 +71,7 @@ static const struct file_operations btrfs_dir_file_operations;
static struct extent_io_ops btrfs_extent_io_ops;
static struct kmem_cache *btrfs_inode_cachep;
+static struct kmem_cache *btrfs_delalloc_work_cachep;
struct kmem_cache *btrfs_trans_handle_cachep;
struct kmem_cache *btrfs_transaction_cachep;
struct kmem_cache *btrfs_path_cachep;
@@ -87,13 +88,17 @@ static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {
[S_IFLNK >> S_SHIFT] = BTRFS_FT_SYMLINK,
};
-static int btrfs_setsize(struct inode *inode, loff_t newsize);
+static int btrfs_setsize(struct inode *inode, struct iattr *attr);
static int btrfs_truncate(struct inode *inode);
static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
static noinline int cow_file_range(struct inode *inode,
struct page *locked_page,
u64 start, u64 end, int *page_started,
unsigned long *nr_written, int unlock);
+static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
+ u64 len, u64 orig_start,
+ u64 block_start, u64 block_len,
+ u64 orig_block_len, int type);
static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir,
@@ -698,14 +703,19 @@ retry:
em->block_start = ins.objectid;
em->block_len = ins.offset;
+ em->orig_block_len = ins.offset;
em->bdev = root->fs_info->fs_devices->latest_bdev;
em->compress_type = async_extent->compress_type;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
+ em->generation = -1;
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
+ if (!ret)
+ list_move(&em->list,
+ &em_tree->modified_extents);
write_unlock(&em_tree->lock);
if (ret != -EEXIST) {
free_extent_map(em);
@@ -803,14 +813,14 @@ static u64 get_extent_allocation_hint(struct inode *inode, u64 start,
* required to start IO on it. It may be clean and already done with
* IO when we return.
*/
-static noinline int cow_file_range(struct inode *inode,
- struct page *locked_page,
- u64 start, u64 end, int *page_started,
- unsigned long *nr_written,
- int unlock)
+static noinline int __cow_file_range(struct btrfs_trans_handle *trans,
+ struct inode *inode,
+ struct btrfs_root *root,
+ struct page *locked_page,
+ u64 start, u64 end, int *page_started,
+ unsigned long *nr_written,
+ int unlock)
{
- struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_trans_handle *trans;
u64 alloc_hint = 0;
u64 num_bytes;
unsigned long ram_size;
@@ -823,25 +833,10 @@ static noinline int cow_file_range(struct inode *inode,
int ret = 0;
BUG_ON(btrfs_is_free_space_inode(inode));
- trans = btrfs_join_transaction(root);
- if (IS_ERR(trans)) {
- extent_clear_unlock_delalloc(inode,
- &BTRFS_I(inode)->io_tree,
- start, end, locked_page,
- EXTENT_CLEAR_UNLOCK_PAGE |
- EXTENT_CLEAR_UNLOCK |
- EXTENT_CLEAR_DELALLOC |
- EXTENT_CLEAR_DIRTY |
- EXTENT_SET_WRITEBACK |
- EXTENT_END_WRITEBACK);
- return PTR_ERR(trans);
- }
- trans->block_rsv = &root->fs_info->delalloc_block_rsv;
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
num_bytes = max(blocksize, num_bytes);
disk_num_bytes = num_bytes;
- ret = 0;
/* if this is a small write inside eof, kick off defrag */
if (num_bytes < 64 * 1024 &&
@@ -900,12 +895,17 @@ static noinline int cow_file_range(struct inode *inode,
em->block_start = ins.objectid;
em->block_len = ins.offset;
+ em->orig_block_len = ins.offset;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
+ em->generation = -1;
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
+ if (!ret)
+ list_move(&em->list,
+ &em_tree->modified_extents);
write_unlock(&em_tree->lock);
if (ret != -EEXIST) {
free_extent_map(em);
@@ -952,11 +952,9 @@ static noinline int cow_file_range(struct inode *inode,
alloc_hint = ins.objectid + ins.offset;
start += cur_alloc_size;
}
- ret = 0;
out:
- btrfs_end_transaction(trans, root);
-
return ret;
+
out_unlock:
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
@@ -971,6 +969,39 @@ out_unlock:
goto out;
}
+static noinline int cow_file_range(struct inode *inode,
+ struct page *locked_page,
+ u64 start, u64 end, int *page_started,
+ unsigned long *nr_written,
+ int unlock)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ int ret;
+
+ trans = btrfs_join_transaction(root);
+ if (IS_ERR(trans)) {
+ extent_clear_unlock_delalloc(inode,
+ &BTRFS_I(inode)->io_tree,
+ start, end, locked_page,
+ EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_UNLOCK |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_CLEAR_DIRTY |
+ EXTENT_SET_WRITEBACK |
+ EXTENT_END_WRITEBACK);
+ return PTR_ERR(trans);
+ }
+ trans->block_rsv = &root->fs_info->delalloc_block_rsv;
+
+ ret = __cow_file_range(trans, inode, root, locked_page, start, end,
+ page_started, nr_written, unlock);
+
+ btrfs_end_transaction(trans, root);
+
+ return ret;
+}
+
/*
* work queue call back to started compression on a file and pages
*/
@@ -1126,6 +1157,7 @@ static noinline int run_delalloc_nocow(struct inode *inode,
u64 extent_offset;
u64 disk_bytenr;
u64 num_bytes;
+ u64 disk_num_bytes;
int extent_type;
int ret, err;
int type;
@@ -1228,6 +1260,8 @@ next_slot:
extent_offset = btrfs_file_extent_offset(leaf, fi);
extent_end = found_key.offset +
btrfs_file_extent_num_bytes(leaf, fi);
+ disk_num_bytes =
+ btrfs_file_extent_disk_num_bytes(leaf, fi);
if (extent_end <= start) {
path->slots[0]++;
goto next_slot;
@@ -1281,9 +1315,9 @@ out_check:
btrfs_release_path(path);
if (cow_start != (u64)-1) {
- ret = cow_file_range(inode, locked_page, cow_start,
- found_key.offset - 1, page_started,
- nr_written, 1);
+ ret = __cow_file_range(trans, inode, root, locked_page,
+ cow_start, found_key.offset - 1,
+ page_started, nr_written, 1);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto error;
@@ -1298,16 +1332,21 @@ out_check:
em = alloc_extent_map();
BUG_ON(!em); /* -ENOMEM */
em->start = cur_offset;
- em->orig_start = em->start;
+ em->orig_start = found_key.offset - extent_offset;
em->len = num_bytes;
em->block_len = num_bytes;
em->block_start = disk_bytenr;
+ em->orig_block_len = disk_num_bytes;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
- set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
+ set_bit(EXTENT_FLAG_FILLING, &em->flags);
+ em->generation = -1;
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
+ if (!ret)
+ list_move(&em->list,
+ &em_tree->modified_extents);
write_unlock(&em_tree->lock);
if (ret != -EEXIST) {
free_extent_map(em);
@@ -1352,8 +1391,9 @@ out_check:
}
if (cow_start != (u64)-1) {
- ret = cow_file_range(inode, locked_page, cow_start, end,
- page_started, nr_written, 1);
+ ret = __cow_file_range(trans, inode, root, locked_page,
+ cow_start, end,
+ page_started, nr_written, 1);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto error;
@@ -1531,7 +1571,6 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
unsigned long bio_flags)
{
struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
- struct btrfs_mapping_tree *map_tree;
u64 logical = (u64)bio->bi_sector << 9;
u64 length = 0;
u64 map_length;
@@ -1541,11 +1580,10 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
return 0;
length = bio->bi_size;
- map_tree = &root->fs_info->mapping_tree;
map_length = length;
- ret = btrfs_map_block(map_tree, READ, logical,
+ ret = btrfs_map_block(root->fs_info, READ, logical,
&map_length, NULL, 0);
- /* Will always return 0 or 1 with map_multi == NULL */
+ /* Will always return 0 with map_multi == NULL */
BUG_ON(ret < 0);
if (map_length < length + size)
return 1;
@@ -1586,7 +1624,12 @@ static int __btrfs_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
u64 bio_offset)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
- return btrfs_map_bio(root, rw, bio, mirror_num, 1);
+ int ret;
+
+ ret = btrfs_map_bio(root, rw, bio, mirror_num, 1);
+ if (ret)
+ bio_endio(bio, ret);
+ return ret;
}
/*
@@ -1601,6 +1644,7 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
int ret = 0;
int skip_sum;
int metadata = 0;
+ int async = !atomic_read(&BTRFS_I(inode)->sync_writers);
skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
@@ -1610,31 +1654,43 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
if (!(rw & REQ_WRITE)) {
ret = btrfs_bio_wq_end_io(root->fs_info, bio, metadata);
if (ret)
- return ret;
+ goto out;
if (bio_flags & EXTENT_BIO_COMPRESSED) {
- return btrfs_submit_compressed_read(inode, bio,
- mirror_num, bio_flags);
+ ret = btrfs_submit_compressed_read(inode, bio,
+ mirror_num,
+ bio_flags);
+ goto out;
} else if (!skip_sum) {
ret = btrfs_lookup_bio_sums(root, inode, bio, NULL);
if (ret)
- return ret;
+ goto out;
}
goto mapit;
- } else if (!skip_sum) {
+ } else if (async && !skip_sum) {
/* csum items have already been cloned */
if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID)
goto mapit;
/* we're doing a write, do the async checksumming */
- return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
+ ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
inode, rw, bio, mirror_num,
bio_flags, bio_offset,
__btrfs_submit_bio_start,
__btrfs_submit_bio_done);
+ goto out;
+ } else if (!skip_sum) {
+ ret = btrfs_csum_one_bio(root, inode, bio, 0, 0);
+ if (ret)
+ goto out;
}
mapit:
- return btrfs_map_bio(root, rw, bio, mirror_num, 0);
+ ret = btrfs_map_bio(root, rw, bio, mirror_num, 0);
+
+out:
+ if (ret < 0)
+ bio_endio(bio, ret);
+ return ret;
}
/*
@@ -1657,8 +1713,7 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
struct extent_state **cached_state)
{
- if ((end & (PAGE_CACHE_SIZE - 1)) == 0)
- WARN_ON(1);
+ WARN_ON((end & (PAGE_CACHE_SIZE - 1)) == 0);
return set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end,
cached_state, GFP_NOFS);
}
@@ -1867,22 +1922,20 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) {
BUG_ON(!list_empty(&ordered_extent->list)); /* Logic error */
- ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent);
- if (!ret) {
- if (nolock)
- trans = btrfs_join_transaction_nolock(root);
- else
- trans = btrfs_join_transaction(root);
- if (IS_ERR(trans)) {
- ret = PTR_ERR(trans);
- trans = NULL;
- goto out;
- }
- trans->block_rsv = &root->fs_info->delalloc_block_rsv;
- ret = btrfs_update_inode_fallback(trans, root, inode);
- if (ret) /* -ENOMEM or corruption */
- btrfs_abort_transaction(trans, root, ret);
+ btrfs_ordered_update_i_size(inode, 0, ordered_extent);
+ if (nolock)
+ trans = btrfs_join_transaction_nolock(root);
+ else
+ trans = btrfs_join_transaction(root);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ trans = NULL;
+ goto out;
}
+ trans->block_rsv = &root->fs_info->delalloc_block_rsv;
+ ret = btrfs_update_inode_fallback(trans, root, inode);
+ if (ret) /* -ENOMEM or corruption */
+ btrfs_abort_transaction(trans, root, ret);
goto out;
}
@@ -1931,15 +1984,11 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
add_pending_csums(trans, inode, ordered_extent->file_offset,
&ordered_extent->list);
- ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent);
- if (!ret || !test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) {
- ret = btrfs_update_inode_fallback(trans, root, inode);
- if (ret) { /* -ENOMEM or corruption */
- btrfs_abort_transaction(trans, root, ret);
- goto out_unlock;
- }
- } else {
- btrfs_set_inode_last_trans(trans, inode);
+ btrfs_ordered_update_i_size(inode, 0, ordered_extent);
+ ret = btrfs_update_inode_fallback(trans, root, inode);
+ if (ret) { /* -ENOMEM or corruption */
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_unlock;
}
ret = 0;
out_unlock:
@@ -2429,6 +2478,18 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
continue;
}
nr_truncate++;
+
+ /* 1 for the orphan item deletion. */
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto out;
+ }
+ ret = btrfs_orphan_add(trans, inode);
+ btrfs_end_transaction(trans, root);
+ if (ret)
+ goto out;
+
ret = btrfs_truncate(inode);
} else {
nr_unlink++;
@@ -3074,7 +3135,6 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
struct btrfs_trans_handle *trans;
struct inode *inode = dentry->d_inode;
int ret;
- unsigned long nr = 0;
trans = __unlink_start_trans(dir, dentry);
if (IS_ERR(trans))
@@ -3094,9 +3154,8 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
}
out:
- nr = trans->blocks_used;
__unlink_end_trans(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
return ret;
}
@@ -3186,7 +3245,6 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
int err = 0;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_trans_handle *trans;
- unsigned long nr = 0;
if (inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
@@ -3215,9 +3273,8 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
if (!err)
btrfs_i_size_write(inode, 0);
out:
- nr = trans->blocks_used;
__unlink_end_trans(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
return err;
}
@@ -3497,11 +3554,11 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
if (ret)
goto out;
- ret = -ENOMEM;
again:
page = find_or_create_page(mapping, index, mask);
if (!page) {
btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE);
+ ret = -ENOMEM;
goto out;
}
@@ -3550,7 +3607,6 @@ again:
goto out_unlock;
}
- ret = 0;
if (offset != PAGE_CACHE_SIZE) {
if (!len)
len = PAGE_CACHE_SIZE - offset;
@@ -3621,6 +3677,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
block_end - cur_offset, 0);
if (IS_ERR(em)) {
err = PTR_ERR(em);
+ em = NULL;
break;
}
last_byte = min(extent_map_end(em), block_end);
@@ -3668,6 +3725,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
hole_em->block_start = EXTENT_MAP_HOLE;
hole_em->block_len = 0;
+ hole_em->orig_block_len = 0;
hole_em->bdev = root->fs_info->fs_devices->latest_bdev;
hole_em->compress_type = BTRFS_COMPRESS_NONE;
hole_em->generation = trans->transid;
@@ -3703,16 +3761,27 @@ next:
return err;
}
-static int btrfs_setsize(struct inode *inode, loff_t newsize)
+static int btrfs_setsize(struct inode *inode, struct iattr *attr)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
loff_t oldsize = i_size_read(inode);
+ loff_t newsize = attr->ia_size;
+ int mask = attr->ia_valid;
int ret;
if (newsize == oldsize)
return 0;
+ /*
+ * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
+ * special case where we need to update the times despite not having
+ * these flags set. For all other operations the VFS set these flags
+ * explicitly if it wants a timestamp update.
+ */
+ if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME))))
+ inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
+
if (newsize > oldsize) {
truncate_pagecache(inode, oldsize, newsize);
ret = btrfs_cont_expand(inode, oldsize, newsize);
@@ -3738,9 +3807,34 @@ static int btrfs_setsize(struct inode *inode, loff_t newsize)
set_bit(BTRFS_INODE_ORDERED_DATA_CLOSE,
&BTRFS_I(inode)->runtime_flags);
+ /*
+ * 1 for the orphan item we're going to add
+ * 1 for the orphan item deletion.
+ */
+ trans = btrfs_start_transaction(root, 2);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+
+ /*
+ * We need to do this in case we fail at _any_ point during the
+ * actual truncate. Once we do the truncate_setsize we could
+ * invalidate pages which forces any outstanding ordered io to
+ * be instantly completed which will give us extents that need
+ * to be truncated. If we fail to get an orphan inode down we
+ * could have left over extents that were never meant to live,
+ * so we need to garuntee from this point on that everything
+ * will be consistent.
+ */
+ ret = btrfs_orphan_add(trans, inode);
+ btrfs_end_transaction(trans, root);
+ if (ret)
+ return ret;
+
/* we don't support swapfiles, so vmtruncate shouldn't fail */
truncate_setsize(inode, newsize);
ret = btrfs_truncate(inode);
+ if (ret && inode->i_nlink)
+ btrfs_orphan_del(NULL, inode);
}
return ret;
@@ -3760,7 +3854,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
return err;
if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) {
- err = btrfs_setsize(inode, attr->ia_size);
+ err = btrfs_setsize(inode, attr);
if (err)
return err;
}
@@ -3783,7 +3877,6 @@ void btrfs_evict_inode(struct inode *inode)
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_block_rsv *rsv, *global_rsv;
u64 min_size = btrfs_calc_trunc_metadata_size(root, 1);
- unsigned long nr;
int ret;
trace_btrfs_inode_evict(inode);
@@ -3829,7 +3922,8 @@ void btrfs_evict_inode(struct inode *inode)
* inode item when doing the truncate.
*/
while (1) {
- ret = btrfs_block_rsv_refill_noflush(root, rsv, min_size);
+ ret = btrfs_block_rsv_refill(root, rsv, min_size,
+ BTRFS_RESERVE_FLUSH_LIMIT);
/*
* Try and steal from the global reserve since we will
@@ -3847,7 +3941,7 @@ void btrfs_evict_inode(struct inode *inode)
goto no_delete;
}
- trans = btrfs_start_transaction_noflush(root, 1);
+ trans = btrfs_start_transaction_lflush(root, 1);
if (IS_ERR(trans)) {
btrfs_orphan_del(NULL, inode);
btrfs_free_block_rsv(root, rsv);
@@ -3864,10 +3958,9 @@ void btrfs_evict_inode(struct inode *inode)
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
trans = NULL;
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
}
btrfs_free_block_rsv(root, rsv);
@@ -3883,9 +3976,8 @@ void btrfs_evict_inode(struct inode *inode)
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID))
btrfs_return_ino(root, btrfs_ino(inode));
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
no_delete:
clear_inode(inode);
return;
@@ -4219,16 +4311,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
if (dentry->d_name.len > BTRFS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
- if (unlikely(d_need_lookup(dentry))) {
- memcpy(&location, dentry->d_fsdata, sizeof(struct btrfs_key));
- kfree(dentry->d_fsdata);
- dentry->d_fsdata = NULL;
- /* This thing is hashed, drop it for now */
- d_drop(dentry);
- } else {
- ret = btrfs_inode_by_name(dir, dentry, &location);
- }
-
+ ret = btrfs_inode_by_name(dir, dentry, &location);
if (ret < 0)
return ERR_PTR(ret);
@@ -4298,11 +4381,6 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
struct dentry *ret;
ret = d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
- if (unlikely(d_need_lookup(dentry))) {
- spin_lock(&dentry->d_lock);
- dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
- spin_unlock(&dentry->d_lock);
- }
return ret;
}
@@ -4775,8 +4853,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
if (S_ISREG(mode)) {
if (btrfs_test_opt(root, NODATASUM))
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
- if (btrfs_test_opt(root, NODATACOW) ||
- (BTRFS_I(dir)->flags & BTRFS_INODE_NODATACOW))
+ if (btrfs_test_opt(root, NODATACOW))
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW;
}
@@ -4842,7 +4919,7 @@ int btrfs_add_link(struct btrfs_trans_handle *trans,
ret = btrfs_insert_dir_item(trans, root, name, name_len,
parent_inode, &key,
btrfs_inode_type(inode), index);
- if (ret == -EEXIST)
+ if (ret == -EEXIST || ret == -EOVERFLOW)
goto fail_dir_item;
else if (ret) {
btrfs_abort_transaction(trans, root, ret);
@@ -4897,7 +4974,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
int err;
int drop_inode = 0;
u64 objectid;
- unsigned long nr = 0;
u64 index = 0;
if (!new_valid_dev(rdev))
@@ -4930,6 +5006,12 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
goto out_unlock;
}
+ err = btrfs_update_inode(trans, root, inode);
+ if (err) {
+ drop_inode = 1;
+ goto out_unlock;
+ }
+
/*
* If the active LSM wants to access the inode during
* d_instantiate it needs these. Smack checks to see
@@ -4947,9 +5029,8 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
d_instantiate(dentry, inode);
}
out_unlock:
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -4963,9 +5044,8 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct inode *inode = NULL;
- int drop_inode = 0;
+ int drop_inode_on_err = 0;
int err;
- unsigned long nr = 0;
u64 objectid;
u64 index = 0;
@@ -4989,12 +5069,15 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
err = PTR_ERR(inode);
goto out_unlock;
}
+ drop_inode_on_err = 1;
err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name);
- if (err) {
- drop_inode = 1;
+ if (err)
+ goto out_unlock;
+
+ err = btrfs_update_inode(trans, root, inode);
+ if (err)
goto out_unlock;
- }
/*
* If the active LSM wants to access the inode during
@@ -5007,21 +5090,20 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
if (err)
- drop_inode = 1;
- else {
- inode->i_mapping->a_ops = &btrfs_aops;
- inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
- BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
- d_instantiate(dentry, inode);
- }
+ goto out_unlock;
+
+ inode->i_mapping->a_ops = &btrfs_aops;
+ inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
+ BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
+ d_instantiate(dentry, inode);
+
out_unlock:
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- if (drop_inode) {
+ if (err && drop_inode_on_err) {
inode_dec_link_count(inode);
iput(inode);
}
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
return err;
}
@@ -5032,7 +5114,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
struct btrfs_root *root = BTRFS_I(dir)->root;
struct inode *inode = old_dentry->d_inode;
u64 index;
- unsigned long nr = 0;
int err;
int drop_inode = 0;
@@ -5062,6 +5143,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
inode_inc_iversion(inode);
inode->i_ctime = CURRENT_TIME;
ihold(inode);
+ set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags);
err = btrfs_add_nondir(trans, dir, dentry, inode, 1, index);
@@ -5076,14 +5158,13 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
btrfs_log_new_name(trans, inode, NULL, parent);
}
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
fail:
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
}
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
return err;
}
@@ -5096,7 +5177,6 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
int drop_on_err = 0;
u64 objectid = 0;
u64 index = 0;
- unsigned long nr = 1;
/*
* 2 items for inode and ref
@@ -5142,11 +5222,10 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
drop_on_err = 0;
out_fail:
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
if (drop_on_err)
iput(inode);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
return err;
}
@@ -5340,6 +5419,7 @@ again:
if (start + len <= found_key.offset)
goto not_found;
em->start = start;
+ em->orig_start = start;
em->len = found_key.offset - start;
goto not_found_em;
}
@@ -5350,6 +5430,8 @@ again:
em->len = extent_end - extent_start;
em->orig_start = extent_start -
btrfs_file_extent_offset(leaf, item);
+ em->orig_block_len = btrfs_file_extent_disk_num_bytes(leaf,
+ item);
bytenr = btrfs_file_extent_disk_bytenr(leaf, item);
if (bytenr == 0) {
em->block_start = EXTENT_MAP_HOLE;
@@ -5359,8 +5441,7 @@ again:
set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
em->compress_type = compress_type;
em->block_start = bytenr;
- em->block_len = btrfs_file_extent_disk_num_bytes(leaf,
- item);
+ em->block_len = em->orig_block_len;
} else {
bytenr += btrfs_file_extent_offset(leaf, item);
em->block_start = bytenr;
@@ -5390,7 +5471,8 @@ again:
em->start = extent_start + extent_offset;
em->len = (copy_size + root->sectorsize - 1) &
~((u64)root->sectorsize - 1);
- em->orig_start = EXTENT_MAP_INLINE;
+ em->orig_block_len = em->len;
+ em->orig_start = em->start;
if (compress_type) {
set_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
em->compress_type = compress_type;
@@ -5439,11 +5521,11 @@ again:
extent_map_end(em) - 1, NULL, GFP_NOFS);
goto insert;
} else {
- printk(KERN_ERR "btrfs unknown found_type %d\n", found_type);
- WARN_ON(1);
+ WARN(1, KERN_ERR "btrfs unknown found_type %d\n", found_type);
}
not_found:
em->start = start;
+ em->orig_start = start;
em->len = len;
not_found_em:
em->block_start = EXTENT_MAP_HOLE;
@@ -5539,10 +5621,13 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag
return em;
if (em) {
/*
- * if our em maps to a hole, there might
- * actually be delalloc bytes behind it
+ * if our em maps to
+ * - a hole or
+ * - a pre-alloc extent,
+ * there might actually be delalloc bytes behind it.
*/
- if (em->block_start != EXTENT_MAP_HOLE)
+ if (em->block_start != EXTENT_MAP_HOLE &&
+ !test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
return em;
else
hole_em = em;
@@ -5624,6 +5709,8 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag
*/
em->block_start = hole_em->block_start;
em->block_len = hole_len;
+ if (test_bit(EXTENT_FLAG_PREALLOC, &hole_em->flags))
+ set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
} else {
em->start = range_start;
em->len = found;
@@ -5645,38 +5732,19 @@ out:
}
static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
- struct extent_map *em,
u64 start, u64 len)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
+ struct extent_map *em;
struct btrfs_key ins;
u64 alloc_hint;
int ret;
- bool insert = false;
-
- /*
- * Ok if the extent map we looked up is a hole and is for the exact
- * range we want, there is no reason to allocate a new one, however if
- * it is not right then we need to free this one and drop the cache for
- * our range.
- */
- if (em->block_start != EXTENT_MAP_HOLE || em->start != start ||
- em->len != len) {
- free_extent_map(em);
- em = NULL;
- insert = true;
- btrfs_drop_extent_cache(inode, start, start + len - 1, 0);
- }
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return ERR_CAST(trans);
- if (start <= BTRFS_I(inode)->disk_i_size && len < 64 * 1024)
- btrfs_add_inode_defrag(trans, inode);
-
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
alloc_hint = get_extent_allocation_hint(inode, start, len);
@@ -5687,37 +5755,10 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
goto out;
}
- if (!em) {
- em = alloc_extent_map();
- if (!em) {
- em = ERR_PTR(-ENOMEM);
- goto out;
- }
- }
-
- em->start = start;
- em->orig_start = em->start;
- em->len = ins.offset;
-
- em->block_start = ins.objectid;
- em->block_len = ins.offset;
- em->bdev = root->fs_info->fs_devices->latest_bdev;
-
- /*
- * We need to do this because if we're using the original em we searched
- * for, we could have EXTENT_FLAG_VACANCY set, and we don't want that.
- */
- em->flags = 0;
- set_bit(EXTENT_FLAG_PINNED, &em->flags);
-
- while (insert) {
- write_lock(&em_tree->lock);
- ret = add_extent_mapping(em_tree, em);
- write_unlock(&em_tree->lock);
- if (ret != -EEXIST)
- break;
- btrfs_drop_extent_cache(inode, start, start + em->len - 1, 0);
- }
+ em = create_pinned_em(inode, start, ins.offset, start, ins.objectid,
+ ins.offset, ins.offset, 0);
+ if (IS_ERR(em))
+ goto out;
ret = btrfs_add_ordered_extent_dio(inode, start, ins.objectid,
ins.offset, ins.offset, 0);
@@ -5894,7 +5935,7 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
u64 len, u64 orig_start,
u64 block_start, u64 block_len,
- int type)
+ u64 orig_block_len, int type)
{
struct extent_map_tree *em_tree;
struct extent_map *em;
@@ -5912,15 +5953,20 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
em->block_len = block_len;
em->block_start = block_start;
em->bdev = root->fs_info->fs_devices->latest_bdev;
+ em->orig_block_len = orig_block_len;
+ em->generation = -1;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
if (type == BTRFS_ORDERED_PREALLOC)
- set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
+ set_bit(EXTENT_FLAG_FILLING, &em->flags);
do {
btrfs_drop_extent_cache(inode, em->start,
em->start + em->len - 1, 0);
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
+ if (!ret)
+ list_move(&em->list,
+ &em_tree->modified_extents);
write_unlock(&em_tree->lock);
} while (ret == -EEXIST);
@@ -6047,13 +6093,15 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
goto must_cow;
if (can_nocow_odirect(trans, inode, start, len) == 1) {
- u64 orig_start = em->start;
+ u64 orig_start = em->orig_start;
+ u64 orig_block_len = em->orig_block_len;
if (type == BTRFS_ORDERED_PREALLOC) {
free_extent_map(em);
em = create_pinned_em(inode, start, len,
orig_start,
- block_start, len, type);
+ block_start, len,
+ orig_block_len, type);
if (IS_ERR(em)) {
btrfs_end_transaction(trans, root);
goto unlock_err;
@@ -6077,7 +6125,8 @@ must_cow:
* it above
*/
len = bh_result->b_size;
- em = btrfs_new_extent_direct(inode, em, start, len);
+ free_extent_map(em);
+ em = btrfs_new_extent_direct(inode, start, len);
if (IS_ERR(em)) {
ret = PTR_ERR(em);
goto unlock_err;
@@ -6318,6 +6367,9 @@ static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode,
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
+ if (async_submit)
+ async_submit = !atomic_read(&BTRFS_I(inode)->sync_writers);
+
bio_get(bio);
if (!write) {
@@ -6362,7 +6414,6 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
{
struct inode *inode = dip->inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
- struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
struct bio *bio;
struct bio *orig_bio = dip->orig_bio;
struct bio_vec *bvec = orig_bio->bi_io_vec;
@@ -6375,7 +6426,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
int async_submit = 0;
map_length = orig_bio->bi_size;
- ret = btrfs_map_block(map_tree, READ, start_sector << 9,
+ ret = btrfs_map_block(root->fs_info, READ, start_sector << 9,
&map_length, NULL, 0);
if (ret) {
bio_put(orig_bio);
@@ -6429,7 +6480,8 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
bio->bi_end_io = btrfs_end_dio_bio;
map_length = orig_bio->bi_size;
- ret = btrfs_map_block(map_tree, READ, start_sector << 9,
+ ret = btrfs_map_block(root->fs_info, READ,
+ start_sector << 9,
&map_length, NULL, 0);
if (ret) {
bio_put(bio);
@@ -6582,9 +6634,17 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
btrfs_submit_direct, 0);
}
+#define BTRFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC)
+
static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len)
{
+ int ret;
+
+ ret = fiemap_check_flags(fieinfo, BTRFS_FIEMAP_FLAGS);
+ if (ret)
+ return ret;
+
return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent_fiemap);
}
@@ -6855,7 +6915,6 @@ static int btrfs_truncate(struct inode *inode)
int ret;
int err = 0;
struct btrfs_trans_handle *trans;
- unsigned long nr;
u64 mask = root->sectorsize - 1;
u64 min_size = btrfs_calc_trunc_metadata_size(root, 1);
@@ -6910,11 +6969,9 @@ static int btrfs_truncate(struct inode *inode)
/*
* 1 for the truncate slack space
- * 1 for the orphan item we're going to add
- * 1 for the orphan item deletion
* 1 for updating the inode.
*/
- trans = btrfs_start_transaction(root, 4);
+ trans = btrfs_start_transaction(root, 2);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
goto out;
@@ -6925,12 +6982,6 @@ static int btrfs_truncate(struct inode *inode)
min_size);
BUG_ON(ret);
- ret = btrfs_orphan_add(trans, inode);
- if (ret) {
- btrfs_end_transaction(trans, root);
- goto out;
- }
-
/*
* setattr is responsible for setting the ordered_data_close flag,
* but that is only tested during the last file release. That
@@ -6978,9 +7029,8 @@ static int btrfs_truncate(struct inode *inode)
break;
}
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
trans = btrfs_start_transaction(root, 2);
if (IS_ERR(trans)) {
@@ -7000,12 +7050,6 @@ static int btrfs_truncate(struct inode *inode)
ret = btrfs_orphan_del(trans, inode);
if (ret)
err = ret;
- } else if (ret && inode->i_nlink > 0) {
- /*
- * Failed to do the truncate, remove us from the in memory
- * orphan list.
- */
- ret = btrfs_orphan_del(NULL, inode);
}
if (trans) {
@@ -7014,9 +7058,8 @@ static int btrfs_truncate(struct inode *inode)
if (ret && !err)
err = ret;
- nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
}
out:
@@ -7093,6 +7136,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
extent_io_tree_init(&ei->io_failure_tree, &inode->i_data);
ei->io_tree.track_uptodate = 1;
ei->io_failure_tree.track_uptodate = 1;
+ atomic_set(&ei->sync_writers, 0);
mutex_init(&ei->log_mutex);
mutex_init(&ei->delalloc_mutex);
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
@@ -7203,6 +7247,8 @@ void btrfs_destroy_cachep(void)
kmem_cache_destroy(btrfs_path_cachep);
if (btrfs_free_space_cachep)
kmem_cache_destroy(btrfs_free_space_cachep);
+ if (btrfs_delalloc_work_cachep)
+ kmem_cache_destroy(btrfs_delalloc_work_cachep);
}
int btrfs_init_cachep(void)
@@ -7237,6 +7283,13 @@ int btrfs_init_cachep(void)
if (!btrfs_free_space_cachep)
goto fail;
+ btrfs_delalloc_work_cachep = kmem_cache_create("btrfs_delalloc_work",
+ sizeof(struct btrfs_delalloc_work), 0,
+ SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
+ NULL);
+ if (!btrfs_delalloc_work_cachep)
+ goto fail;
+
return 0;
fail:
btrfs_destroy_cachep();
@@ -7308,6 +7361,28 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (S_ISDIR(old_inode->i_mode) && new_inode &&
new_inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
+
+
+ /* check for collisions, even if the name isn't there */
+ ret = btrfs_check_dir_item_collision(root, new_dir->i_ino,
+ new_dentry->d_name.name,
+ new_dentry->d_name.len);
+
+ if (ret) {
+ if (ret == -EEXIST) {
+ /* we shouldn't get
+ * eexist without a new_inode */
+ if (!new_inode) {
+ WARN_ON(1);
+ return ret;
+ }
+ } else {
+ /* maybe -EOVERFLOW */
+ return ret;
+ }
+ }
+ ret = 0;
+
/*
* we're using rename to replace one file with another.
* and the replacement file is large. Start IO on it now so
@@ -7447,39 +7522,110 @@ out_notrans:
return ret;
}
+static void btrfs_run_delalloc_work(struct btrfs_work *work)
+{
+ struct btrfs_delalloc_work *delalloc_work;
+
+ delalloc_work = container_of(work, struct btrfs_delalloc_work,
+ work);
+ if (delalloc_work->wait)
+ btrfs_wait_ordered_range(delalloc_work->inode, 0, (u64)-1);
+ else
+ filemap_flush(delalloc_work->inode->i_mapping);
+
+ if (delalloc_work->delay_iput)
+ btrfs_add_delayed_iput(delalloc_work->inode);
+ else
+ iput(delalloc_work->inode);
+ complete(&delalloc_work->completion);
+}
+
+struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
+ int wait, int delay_iput)
+{
+ struct btrfs_delalloc_work *work;
+
+ work = kmem_cache_zalloc(btrfs_delalloc_work_cachep, GFP_NOFS);
+ if (!work)
+ return NULL;
+
+ init_completion(&work->completion);
+ INIT_LIST_HEAD(&work->list);
+ work->inode = inode;
+ work->wait = wait;
+ work->delay_iput = delay_iput;
+ work->work.func = btrfs_run_delalloc_work;
+
+ return work;
+}
+
+void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work)
+{
+ wait_for_completion(&work->completion);
+ kmem_cache_free(btrfs_delalloc_work_cachep, work);
+}
+
/*
* some fairly slow code that needs optimization. This walks the list
* of all the inodes with pending delalloc and forces them to disk.
*/
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
{
- struct list_head *head = &root->fs_info->delalloc_inodes;
struct btrfs_inode *binode;
struct inode *inode;
+ struct btrfs_delalloc_work *work, *next;
+ struct list_head works;
+ struct list_head splice;
+ int ret = 0;
if (root->fs_info->sb->s_flags & MS_RDONLY)
return -EROFS;
+ INIT_LIST_HEAD(&works);
+ INIT_LIST_HEAD(&splice);
+again:
spin_lock(&root->fs_info->delalloc_lock);
- while (!list_empty(head)) {
- binode = list_entry(head->next, struct btrfs_inode,
+ list_splice_init(&root->fs_info->delalloc_inodes, &splice);
+ while (!list_empty(&splice)) {
+ binode = list_entry(splice.next, struct btrfs_inode,
delalloc_inodes);
+
+ list_del_init(&binode->delalloc_inodes);
+
inode = igrab(&binode->vfs_inode);
if (!inode)
- list_del_init(&binode->delalloc_inodes);
+ continue;
+
+ list_add_tail(&binode->delalloc_inodes,
+ &root->fs_info->delalloc_inodes);
spin_unlock(&root->fs_info->delalloc_lock);
- if (inode) {
- filemap_flush(inode->i_mapping);
- if (delay_iput)
- btrfs_add_delayed_iput(inode);
- else
- iput(inode);
+
+ work = btrfs_alloc_delalloc_work(inode, 0, delay_iput);
+ if (unlikely(!work)) {
+ ret = -ENOMEM;
+ goto out;
}
+ list_add_tail(&work->list, &works);
+ btrfs_queue_worker(&root->fs_info->flush_workers,
+ &work->work);
+
cond_resched();
spin_lock(&root->fs_info->delalloc_lock);
}
spin_unlock(&root->fs_info->delalloc_lock);
+ list_for_each_entry_safe(work, next, &works, list) {
+ list_del_init(&work->list);
+ btrfs_wait_and_free_delalloc_work(work);
+ }
+
+ spin_lock(&root->fs_info->delalloc_lock);
+ if (!list_empty(&root->fs_info->delalloc_inodes)) {
+ spin_unlock(&root->fs_info->delalloc_lock);
+ goto again;
+ }
+ spin_unlock(&root->fs_info->delalloc_lock);
+
/* the filemap_flush will queue IO into the worker threads, but
* we have to make sure the IO is actually started and that
* ordered extents get created before we return
@@ -7493,6 +7639,18 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
}
atomic_dec(&root->fs_info->async_submit_draining);
return 0;
+out:
+ list_for_each_entry_safe(work, next, &works, list) {
+ list_del_init(&work->list);
+ btrfs_wait_and_free_delalloc_work(work);
+ }
+
+ if (!list_empty_careful(&splice)) {
+ spin_lock(&root->fs_info->delalloc_lock);
+ list_splice_tail(&splice, &root->fs_info->delalloc_inodes);
+ spin_unlock(&root->fs_info->delalloc_lock);
+ }
+ return ret;
}
static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
@@ -7512,7 +7670,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
unsigned long ptr;
struct btrfs_file_extent_item *ei;
struct extent_buffer *leaf;
- unsigned long nr = 0;
name_len = strlen(symname) + 1;
if (name_len > BTRFS_MAX_INLINE_DATA_SIZE(root))
@@ -7610,13 +7767,12 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
out_unlock:
if (!err)
d_instantiate(dentry, inode);
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
}
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
return err;
}
@@ -7679,6 +7835,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
em->len = ins.offset;
em->block_start = ins.objectid;
em->block_len = ins.offset;
+ em->orig_block_len = ins.offset;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
em->generation = trans->transid;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 8fcf9a59c28d..5b22d45d3c6a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -55,6 +55,7 @@
#include "backref.h"
#include "rcu-string.h"
#include "send.h"
+#include "dev-replace.h"
/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags)
@@ -140,8 +141,11 @@ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir)
BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS;
}
- if (flags & BTRFS_INODE_NODATACOW)
+ if (flags & BTRFS_INODE_NODATACOW) {
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW;
+ if (S_ISREG(inode->i_mode))
+ BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
+ }
btrfs_update_iflags(inode);
}
@@ -571,8 +575,12 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
ret = btrfs_commit_transaction(trans,
root->fs_info->extent_root);
}
- if (ret)
+ if (ret) {
+ /* cleanup_transaction has freed this for us */
+ if (trans->aborted)
+ pending_snapshot = NULL;
goto fail;
+ }
ret = pending_snapshot->error;
if (ret)
@@ -705,6 +713,16 @@ static noinline int btrfs_mksubvol(struct path *parent,
if (error)
goto out_dput;
+ /*
+ * even if this name doesn't exist, we may get hash collisions.
+ * check for them now when we can safely fail
+ */
+ error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root,
+ dir->i_ino, name,
+ namelen);
+ if (error)
+ goto out_dput;
+
down_read(&BTRFS_I(dir)->root->fs_info->subvol_sem);
if (btrfs_root_refs(&BTRFS_I(dir)->root->root_item) == 0)
@@ -1225,7 +1243,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
}
defrag_count += ret;
- balance_dirty_pages_ratelimited_nr(inode->i_mapping, ret);
+ balance_dirty_pages_ratelimited(inode->i_mapping);
mutex_unlock(&inode->i_mutex);
if (newer_than) {
@@ -1293,12 +1311,13 @@ out_ra:
return ret;
}
-static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
+static noinline int btrfs_ioctl_resize(struct file *file,
void __user *arg)
{
u64 new_size;
u64 old_size;
u64 devid = 1;
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_vol_args *vol_args;
struct btrfs_trans_handle *trans;
struct btrfs_device *device = NULL;
@@ -1313,13 +1332,18 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- mutex_lock(&root->fs_info->volume_mutex);
- if (root->fs_info->balance_ctl) {
- printk(KERN_INFO "btrfs: balance in progress\n");
- ret = -EINVAL;
- goto out;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
+
+ if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
+ 1)) {
+ pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+ mnt_drop_write_file(file);
+ return -EINVAL;
}
+ mutex_lock(&root->fs_info->volume_mutex);
vol_args = memdup_user(arg, sizeof(*vol_args));
if (IS_ERR(vol_args)) {
ret = PTR_ERR(vol_args);
@@ -1339,16 +1363,18 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
printk(KERN_INFO "btrfs: resizing devid %llu\n",
(unsigned long long)devid);
}
- device = btrfs_find_device(root, devid, NULL, NULL);
+
+ device = btrfs_find_device(root->fs_info, devid, NULL, NULL);
if (!device) {
printk(KERN_INFO "btrfs: resizer unable to find device %llu\n",
(unsigned long long)devid);
ret = -EINVAL;
goto out_free;
}
- if (device->fs_devices && device->fs_devices->seeding) {
+
+ if (!device->writeable) {
printk(KERN_INFO "btrfs: resizer unable to apply on "
- "seeding device %llu\n",
+ "readonly device %llu\n",
(unsigned long long)devid);
ret = -EINVAL;
goto out_free;
@@ -1371,6 +1397,11 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
}
}
+ if (device->is_tgtdev_for_dev_replace) {
+ ret = -EINVAL;
+ goto out_free;
+ }
+
old_size = device->total_bytes;
if (mod < 0) {
@@ -1409,12 +1440,14 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
btrfs_commit_transaction(trans, root);
} else if (new_size < old_size) {
ret = btrfs_shrink_device(device, new_size);
- }
+ } /* equal, nothing need to do */
out_free:
kfree(vol_args);
out:
mutex_unlock(&root->fs_info->volume_mutex);
+ atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
+ mnt_drop_write_file(file);
return ret;
}
@@ -2065,13 +2098,13 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
err = inode_permission(inode, MAY_WRITE | MAY_EXEC);
if (err)
goto out_dput;
-
- /* check if subvolume may be deleted by a non-root user */
- err = btrfs_may_delete(dir, dentry, 1);
- if (err)
- goto out_dput;
}
+ /* check if subvolume may be deleted by a user */
+ err = btrfs_may_delete(dir, dentry, 1);
+ if (err)
+ goto out_dput;
+
if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) {
err = -EINVAL;
goto out_dput;
@@ -2153,13 +2186,22 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
struct btrfs_ioctl_defrag_range_args *range;
int ret;
- if (btrfs_root_readonly(root))
- return -EROFS;
-
ret = mnt_want_write_file(file);
if (ret)
return ret;
+ if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
+ 1)) {
+ pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+ mnt_drop_write_file(file);
+ return -EINVAL;
+ }
+
+ if (btrfs_root_readonly(root)) {
+ ret = -EROFS;
+ goto out;
+ }
+
switch (inode->i_mode & S_IFMT) {
case S_IFDIR:
if (!capable(CAP_SYS_ADMIN)) {
@@ -2209,6 +2251,7 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
ret = -EINVAL;
}
out:
+ atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
mnt_drop_write_file(file);
return ret;
}
@@ -2221,13 +2264,13 @@ static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- mutex_lock(&root->fs_info->volume_mutex);
- if (root->fs_info->balance_ctl) {
- printk(KERN_INFO "btrfs: balance in progress\n");
- ret = -EINVAL;
- goto out;
+ if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
+ 1)) {
+ pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+ return -EINVAL;
}
+ mutex_lock(&root->fs_info->volume_mutex);
vol_args = memdup_user(arg, sizeof(*vol_args));
if (IS_ERR(vol_args)) {
ret = PTR_ERR(vol_args);
@@ -2240,27 +2283,31 @@ static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
kfree(vol_args);
out:
mutex_unlock(&root->fs_info->volume_mutex);
+ atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
return ret;
}
-static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
+static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
{
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_vol_args *vol_args;
int ret;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
- mutex_lock(&root->fs_info->volume_mutex);
- if (root->fs_info->balance_ctl) {
- printk(KERN_INFO "btrfs: balance in progress\n");
- ret = -EINVAL;
- goto out;
+ if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
+ 1)) {
+ pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+ mnt_drop_write_file(file);
+ return -EINVAL;
}
+ mutex_lock(&root->fs_info->volume_mutex);
vol_args = memdup_user(arg, sizeof(*vol_args));
if (IS_ERR(vol_args)) {
ret = PTR_ERR(vol_args);
@@ -2273,6 +2320,8 @@ static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg)
kfree(vol_args);
out:
mutex_unlock(&root->fs_info->volume_mutex);
+ atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);
+ mnt_drop_write_file(file);
return ret;
}
@@ -2328,7 +2377,7 @@ static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg)
s_uuid = di_args->uuid;
mutex_lock(&fs_devices->device_list_mutex);
- dev = btrfs_find_device(root, di_args->devid, s_uuid, NULL);
+ dev = btrfs_find_device(root->fs_info, di_args->devid, s_uuid, NULL);
mutex_unlock(&fs_devices->device_list_mutex);
if (!dev) {
@@ -2821,12 +2870,19 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
struct btrfs_disk_key disk_key;
u64 objectid = 0;
u64 dir_id;
+ int ret;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (copy_from_user(&objectid, argp, sizeof(objectid)))
- return -EFAULT;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
+
+ if (copy_from_user(&objectid, argp, sizeof(objectid))) {
+ ret = -EFAULT;
+ goto out;
+ }
if (!objectid)
objectid = root->root_key.objectid;
@@ -2836,21 +2892,28 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
location.offset = (u64)-1;
new_root = btrfs_read_fs_root_no_name(root->fs_info, &location);
- if (IS_ERR(new_root))
- return PTR_ERR(new_root);
+ if (IS_ERR(new_root)) {
+ ret = PTR_ERR(new_root);
+ goto out;
+ }
- if (btrfs_root_refs(&new_root->root_item) == 0)
- return -ENOENT;
+ if (btrfs_root_refs(&new_root->root_item) == 0) {
+ ret = -ENOENT;
+ goto out;
+ }
path = btrfs_alloc_path();
- if (!path)
- return -ENOMEM;
+ if (!path) {
+ ret = -ENOMEM;
+ goto out;
+ }
path->leave_spinning = 1;
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
btrfs_free_path(path);
- return PTR_ERR(trans);
+ ret = PTR_ERR(trans);
+ goto out;
}
dir_id = btrfs_super_root_dir(root->fs_info->super_copy);
@@ -2861,7 +2924,8 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
btrfs_end_transaction(trans, root);
printk(KERN_ERR "Umm, you don't have the default dir item, "
"this isn't going to work\n");
- return -ENOENT;
+ ret = -ENOENT;
+ goto out;
}
btrfs_cpu_key_to_disk(&disk_key, &new_root->root_key);
@@ -2871,8 +2935,9 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL);
btrfs_end_transaction(trans, root);
-
- return 0;
+out:
+ mnt_drop_write_file(file);
+ return ret;
}
void btrfs_get_block_group_info(struct list_head *groups_list,
@@ -3036,32 +3101,38 @@ long btrfs_ioctl_trans_end(struct file *file)
return 0;
}
-static noinline long btrfs_ioctl_start_sync(struct file *file, void __user *argp)
+static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root,
+ void __user *argp)
{
- struct btrfs_root *root = BTRFS_I(file->f_dentry->d_inode)->root;
struct btrfs_trans_handle *trans;
u64 transid;
int ret;
- trans = btrfs_start_transaction(root, 0);
- if (IS_ERR(trans))
- return PTR_ERR(trans);
+ trans = btrfs_attach_transaction(root);
+ if (IS_ERR(trans)) {
+ if (PTR_ERR(trans) != -ENOENT)
+ return PTR_ERR(trans);
+
+ /* No running transaction, don't bother */
+ transid = root->fs_info->last_trans_committed;
+ goto out;
+ }
transid = trans->transid;
ret = btrfs_commit_transaction_async(trans, root, 0);
if (ret) {
btrfs_end_transaction(trans, root);
return ret;
}
-
+out:
if (argp)
if (copy_to_user(argp, &transid, sizeof(transid)))
return -EFAULT;
return 0;
}
-static noinline long btrfs_ioctl_wait_sync(struct file *file, void __user *argp)
+static noinline long btrfs_ioctl_wait_sync(struct btrfs_root *root,
+ void __user *argp)
{
- struct btrfs_root *root = BTRFS_I(file->f_dentry->d_inode)->root;
u64 transid;
if (argp) {
@@ -3073,10 +3144,11 @@ static noinline long btrfs_ioctl_wait_sync(struct file *file, void __user *argp)
return btrfs_wait_for_commit(root, transid);
}
-static long btrfs_ioctl_scrub(struct btrfs_root *root, void __user *arg)
+static long btrfs_ioctl_scrub(struct file *file, void __user *arg)
{
- int ret;
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_scrub_args *sa;
+ int ret;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -3085,12 +3157,22 @@ static long btrfs_ioctl_scrub(struct btrfs_root *root, void __user *arg)
if (IS_ERR(sa))
return PTR_ERR(sa);
- ret = btrfs_scrub_dev(root, sa->devid, sa->start, sa->end,
- &sa->progress, sa->flags & BTRFS_SCRUB_READONLY);
+ if (!(sa->flags & BTRFS_SCRUB_READONLY)) {
+ ret = mnt_want_write_file(file);
+ if (ret)
+ goto out;
+ }
+
+ ret = btrfs_scrub_dev(root->fs_info, sa->devid, sa->start, sa->end,
+ &sa->progress, sa->flags & BTRFS_SCRUB_READONLY,
+ 0);
if (copy_to_user(arg, sa, sizeof(*sa)))
ret = -EFAULT;
+ if (!(sa->flags & BTRFS_SCRUB_READONLY))
+ mnt_drop_write_file(file);
+out:
kfree(sa);
return ret;
}
@@ -3100,7 +3182,7 @@ static long btrfs_ioctl_scrub_cancel(struct btrfs_root *root, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- return btrfs_scrub_cancel(root);
+ return btrfs_scrub_cancel(root->fs_info);
}
static long btrfs_ioctl_scrub_progress(struct btrfs_root *root,
@@ -3149,6 +3231,51 @@ static long btrfs_ioctl_get_dev_stats(struct btrfs_root *root,
return ret;
}
+static long btrfs_ioctl_dev_replace(struct btrfs_root *root, void __user *arg)
+{
+ struct btrfs_ioctl_dev_replace_args *p;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ p = memdup_user(arg, sizeof(*p));
+ if (IS_ERR(p))
+ return PTR_ERR(p);
+
+ switch (p->cmd) {
+ case BTRFS_IOCTL_DEV_REPLACE_CMD_START:
+ if (atomic_xchg(
+ &root->fs_info->mutually_exclusive_operation_running,
+ 1)) {
+ pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+ ret = -EINPROGRESS;
+ } else {
+ ret = btrfs_dev_replace_start(root, p);
+ atomic_set(
+ &root->fs_info->mutually_exclusive_operation_running,
+ 0);
+ }
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS:
+ btrfs_dev_replace_status(root->fs_info, p);
+ ret = 0;
+ break;
+ case BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL:
+ ret = btrfs_dev_replace_cancel(root->fs_info, p);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (copy_to_user(arg, p, sizeof(*p)))
+ ret = -EFAULT;
+
+ kfree(p);
+ return ret;
+}
+
static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg)
{
int ret = 0;
@@ -3314,6 +3441,7 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg)
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_ioctl_balance_args *bargs;
struct btrfs_balance_control *bctl;
+ bool need_unlock; /* for mut. excl. ops lock */
int ret;
if (!capable(CAP_SYS_ADMIN))
@@ -3323,14 +3451,61 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg)
if (ret)
return ret;
- mutex_lock(&fs_info->volume_mutex);
+again:
+ if (!atomic_xchg(&fs_info->mutually_exclusive_operation_running, 1)) {
+ mutex_lock(&fs_info->volume_mutex);
+ mutex_lock(&fs_info->balance_mutex);
+ need_unlock = true;
+ goto locked;
+ }
+
+ /*
+ * mut. excl. ops lock is locked. Three possibilites:
+ * (1) some other op is running
+ * (2) balance is running
+ * (3) balance is paused -- special case (think resume)
+ */
mutex_lock(&fs_info->balance_mutex);
+ if (fs_info->balance_ctl) {
+ /* this is either (2) or (3) */
+ if (!atomic_read(&fs_info->balance_running)) {
+ mutex_unlock(&fs_info->balance_mutex);
+ if (!mutex_trylock(&fs_info->volume_mutex))
+ goto again;
+ mutex_lock(&fs_info->balance_mutex);
+
+ if (fs_info->balance_ctl &&
+ !atomic_read(&fs_info->balance_running)) {
+ /* this is (3) */
+ need_unlock = false;
+ goto locked;
+ }
+
+ mutex_unlock(&fs_info->balance_mutex);
+ mutex_unlock(&fs_info->volume_mutex);
+ goto again;
+ } else {
+ /* this is (2) */
+ mutex_unlock(&fs_info->balance_mutex);
+ ret = -EINPROGRESS;
+ goto out;
+ }
+ } else {
+ /* this is (1) */
+ mutex_unlock(&fs_info->balance_mutex);
+ pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+locked:
+ BUG_ON(!atomic_read(&fs_info->mutually_exclusive_operation_running));
if (arg) {
bargs = memdup_user(arg, sizeof(*bargs));
if (IS_ERR(bargs)) {
ret = PTR_ERR(bargs);
- goto out;
+ goto out_unlock;
}
if (bargs->flags & BTRFS_BALANCE_RESUME) {
@@ -3374,11 +3549,17 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg)
}
do_balance:
- ret = btrfs_balance(bctl, bargs);
/*
- * bctl is freed in __cancel_balance or in free_fs_info if
- * restriper was paused all the way until unmount
+ * Ownership of bctl and mutually_exclusive_operation_running
+ * goes to to btrfs_balance. bctl is freed in __cancel_balance,
+ * or, if restriper was paused all the way until unmount, in
+ * free_fs_info. mutually_exclusive_operation_running is
+ * cleared in __cancel_balance.
*/
+ need_unlock = false;
+
+ ret = btrfs_balance(bctl, bargs);
+
if (arg) {
if (copy_to_user(arg, bargs, sizeof(*bargs)))
ret = -EFAULT;
@@ -3386,9 +3567,12 @@ do_balance:
out_bargs:
kfree(bargs);
-out:
+out_unlock:
mutex_unlock(&fs_info->balance_mutex);
mutex_unlock(&fs_info->volume_mutex);
+ if (need_unlock)
+ atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
+out:
mnt_drop_write_file(file);
return ret;
}
@@ -3441,8 +3625,9 @@ out:
return ret;
}
-static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg)
+static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg)
{
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_quota_ctl_args *sa;
struct btrfs_trans_handle *trans = NULL;
int ret;
@@ -3451,12 +3636,15 @@ static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
sa = memdup_user(arg, sizeof(*sa));
- if (IS_ERR(sa))
- return PTR_ERR(sa);
+ if (IS_ERR(sa)) {
+ ret = PTR_ERR(sa);
+ goto drop_write;
+ }
if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) {
trans = btrfs_start_transaction(root, 2);
@@ -3489,14 +3677,16 @@ static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg)
if (err && !ret)
ret = err;
}
-
out:
kfree(sa);
+drop_write:
+ mnt_drop_write_file(file);
return ret;
}
-static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg)
+static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg)
{
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_qgroup_assign_args *sa;
struct btrfs_trans_handle *trans;
int ret;
@@ -3505,12 +3695,15 @@ static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
sa = memdup_user(arg, sizeof(*sa));
- if (IS_ERR(sa))
- return PTR_ERR(sa);
+ if (IS_ERR(sa)) {
+ ret = PTR_ERR(sa);
+ goto drop_write;
+ }
trans = btrfs_join_transaction(root);
if (IS_ERR(trans)) {
@@ -3533,11 +3726,14 @@ static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg)
out:
kfree(sa);
+drop_write:
+ mnt_drop_write_file(file);
return ret;
}
-static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg)
+static long btrfs_ioctl_qgroup_create(struct file *file, void __user *arg)
{
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_qgroup_create_args *sa;
struct btrfs_trans_handle *trans;
int ret;
@@ -3546,12 +3742,20 @@ static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
sa = memdup_user(arg, sizeof(*sa));
- if (IS_ERR(sa))
- return PTR_ERR(sa);
+ if (IS_ERR(sa)) {
+ ret = PTR_ERR(sa);
+ goto drop_write;
+ }
+
+ if (!sa->qgroupid) {
+ ret = -EINVAL;
+ goto out;
+ }
trans = btrfs_join_transaction(root);
if (IS_ERR(trans)) {
@@ -3573,11 +3777,14 @@ static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg)
out:
kfree(sa);
+drop_write:
+ mnt_drop_write_file(file);
return ret;
}
-static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg)
+static long btrfs_ioctl_qgroup_limit(struct file *file, void __user *arg)
{
+ struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
struct btrfs_ioctl_qgroup_limit_args *sa;
struct btrfs_trans_handle *trans;
int ret;
@@ -3587,12 +3794,15 @@ static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
+ ret = mnt_want_write_file(file);
+ if (ret)
+ return ret;
sa = memdup_user(arg, sizeof(*sa));
- if (IS_ERR(sa))
- return PTR_ERR(sa);
+ if (IS_ERR(sa)) {
+ ret = PTR_ERR(sa);
+ goto drop_write;
+ }
trans = btrfs_join_transaction(root);
if (IS_ERR(trans)) {
@@ -3615,6 +3825,8 @@ static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg)
out:
kfree(sa);
+drop_write:
+ mnt_drop_write_file(file);
return ret;
}
@@ -3735,11 +3947,11 @@ long btrfs_ioctl(struct file *file, unsigned int
case BTRFS_IOC_DEFRAG_RANGE:
return btrfs_ioctl_defrag(file, argp);
case BTRFS_IOC_RESIZE:
- return btrfs_ioctl_resize(root, argp);
+ return btrfs_ioctl_resize(file, argp);
case BTRFS_IOC_ADD_DEV:
return btrfs_ioctl_add_dev(root, argp);
case BTRFS_IOC_RM_DEV:
- return btrfs_ioctl_rm_dev(root, argp);
+ return btrfs_ioctl_rm_dev(file, argp);
case BTRFS_IOC_FS_INFO:
return btrfs_ioctl_fs_info(root, argp);
case BTRFS_IOC_DEV_INFO:
@@ -3768,11 +3980,11 @@ long btrfs_ioctl(struct file *file, unsigned int
btrfs_sync_fs(file->f_dentry->d_sb, 1);
return 0;
case BTRFS_IOC_START_SYNC:
- return btrfs_ioctl_start_sync(file, argp);
+ return btrfs_ioctl_start_sync(root, argp);
case BTRFS_IOC_WAIT_SYNC:
- return btrfs_ioctl_wait_sync(file, argp);
+ return btrfs_ioctl_wait_sync(root, argp);
case BTRFS_IOC_SCRUB:
- return btrfs_ioctl_scrub(root, argp);
+ return btrfs_ioctl_scrub(file, argp);
case BTRFS_IOC_SCRUB_CANCEL:
return btrfs_ioctl_scrub_cancel(root, argp);
case BTRFS_IOC_SCRUB_PROGRESS:
@@ -3790,13 +4002,15 @@ long btrfs_ioctl(struct file *file, unsigned int
case BTRFS_IOC_GET_DEV_STATS:
return btrfs_ioctl_get_dev_stats(root, argp);
case BTRFS_IOC_QUOTA_CTL:
- return btrfs_ioctl_quota_ctl(root, argp);
+ return btrfs_ioctl_quota_ctl(file, argp);
case BTRFS_IOC_QGROUP_ASSIGN:
- return btrfs_ioctl_qgroup_assign(root, argp);
+ return btrfs_ioctl_qgroup_assign(file, argp);
case BTRFS_IOC_QGROUP_CREATE:
- return btrfs_ioctl_qgroup_create(root, argp);
+ return btrfs_ioctl_qgroup_create(file, argp);
case BTRFS_IOC_QGROUP_LIMIT:
- return btrfs_ioctl_qgroup_limit(root, argp);
+ return btrfs_ioctl_qgroup_limit(file, argp);
+ case BTRFS_IOC_DEV_REPLACE:
+ return btrfs_ioctl_dev_replace(root, argp);
}
return -ENOTTY;
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 731e2875ab93..dabca9cc8c2e 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -30,6 +30,8 @@ struct btrfs_ioctl_vol_args {
char name[BTRFS_PATH_NAME_MAX + 1];
};
+#define BTRFS_DEVICE_PATH_NAME_MAX 1024
+
#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
@@ -123,7 +125,48 @@ struct btrfs_ioctl_scrub_args {
__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
};
-#define BTRFS_DEVICE_PATH_NAME_MAX 1024
+#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
+#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
+struct btrfs_ioctl_dev_replace_start_params {
+ __u64 srcdevid; /* in, if 0, use srcdev_name instead */
+ __u64 cont_reading_from_srcdev_mode; /* in, see #define
+ * above */
+ __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
+ __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */
+};
+
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4
+struct btrfs_ioctl_dev_replace_status_params {
+ __u64 replace_state; /* out, see #define above */
+ __u64 progress_1000; /* out, 0 <= x <= 1000 */
+ __u64 time_started; /* out, seconds since 1-Jan-1970 */
+ __u64 time_stopped; /* out, seconds since 1-Jan-1970 */
+ __u64 num_write_errors; /* out */
+ __u64 num_uncorrectable_read_errors; /* out */
+};
+
+#define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0
+#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1
+#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2
+#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0
+#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1
+#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2
+struct btrfs_ioctl_dev_replace_args {
+ __u64 cmd; /* in */
+ __u64 result; /* out */
+
+ union {
+ struct btrfs_ioctl_dev_replace_start_params start;
+ struct btrfs_ioctl_dev_replace_status_params status;
+ }; /* in/out */
+
+ __u64 spare[64];
+};
+
struct btrfs_ioctl_dev_info_args {
__u64 devid; /* in/out */
__u8 uuid[BTRFS_UUID_SIZE]; /* in/out */
@@ -453,4 +496,7 @@ struct btrfs_ioctl_send_args {
struct btrfs_ioctl_qgroup_limit_args)
#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
struct btrfs_ioctl_get_dev_stats)
+#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
+ struct btrfs_ioctl_dev_replace_args)
+
#endif
diff --git a/fs/btrfs/math.h b/fs/btrfs/math.h
new file mode 100644
index 000000000000..b7816cefbd13
--- /dev/null
+++ b/fs/btrfs/math.h
@@ -0,0 +1,44 @@
+
+/*
+ * Copyright (C) 2012 Fujitsu. All rights reserved.
+ * Written by Miao Xie <miaox@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_MATH_H
+#define __BTRFS_MATH_H
+
+#include <asm/div64.h>
+
+static inline u64 div_factor(u64 num, int factor)
+{
+ if (factor == 10)
+ return num;
+ num *= factor;
+ do_div(num, 10);
+ return num;
+}
+
+static inline u64 div_factor_fine(u64 num, int factor)
+{
+ if (factor == 100)
+ return num;
+ num *= factor;
+ do_div(num, 100);
+ return num;
+}
+
+#endif
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 7772f02ba28e..f10731297040 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -211,6 +211,8 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
init_waitqueue_head(&entry->wait);
INIT_LIST_HEAD(&entry->list);
INIT_LIST_HEAD(&entry->root_extent_list);
+ INIT_LIST_HEAD(&entry->work_list);
+ init_completion(&entry->completion);
trace_btrfs_ordered_extent_add(inode, entry);
@@ -464,18 +466,28 @@ void btrfs_remove_ordered_extent(struct inode *inode,
wake_up(&entry->wait);
}
+static void btrfs_run_ordered_extent_work(struct btrfs_work *work)
+{
+ struct btrfs_ordered_extent *ordered;
+
+ ordered = container_of(work, struct btrfs_ordered_extent, flush_work);
+ btrfs_start_ordered_extent(ordered->inode, ordered, 1);
+ complete(&ordered->completion);
+}
+
/*
* wait for all the ordered extents in a root. This is done when balancing
* space between drives.
*/
void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
{
- struct list_head splice;
+ struct list_head splice, works;
struct list_head *cur;
- struct btrfs_ordered_extent *ordered;
+ struct btrfs_ordered_extent *ordered, *next;
struct inode *inode;
INIT_LIST_HEAD(&splice);
+ INIT_LIST_HEAD(&works);
spin_lock(&root->fs_info->ordered_extent_lock);
list_splice_init(&root->fs_info->ordered_extents, &splice);
@@ -494,19 +506,32 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
spin_unlock(&root->fs_info->ordered_extent_lock);
if (inode) {
- btrfs_start_ordered_extent(inode, ordered, 1);
- btrfs_put_ordered_extent(ordered);
- if (delay_iput)
- btrfs_add_delayed_iput(inode);
- else
- iput(inode);
+ ordered->flush_work.func = btrfs_run_ordered_extent_work;
+ list_add_tail(&ordered->work_list, &works);
+ btrfs_queue_worker(&root->fs_info->flush_workers,
+ &ordered->flush_work);
} else {
btrfs_put_ordered_extent(ordered);
}
+ cond_resched();
spin_lock(&root->fs_info->ordered_extent_lock);
}
spin_unlock(&root->fs_info->ordered_extent_lock);
+
+ list_for_each_entry_safe(ordered, next, &works, work_list) {
+ list_del_init(&ordered->work_list);
+ wait_for_completion(&ordered->completion);
+
+ inode = ordered->inode;
+ btrfs_put_ordered_extent(ordered);
+ if (delay_iput)
+ btrfs_add_delayed_iput(inode);
+ else
+ iput(inode);
+
+ cond_resched();
+ }
}
/*
@@ -519,13 +544,17 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput)
* extra check to make sure the ordered operation list really is empty
* before we return
*/
-void btrfs_run_ordered_operations(struct btrfs_root *root, int wait)
+int btrfs_run_ordered_operations(struct btrfs_root *root, int wait)
{
struct btrfs_inode *btrfs_inode;
struct inode *inode;
struct list_head splice;
+ struct list_head works;
+ struct btrfs_delalloc_work *work, *next;
+ int ret = 0;
INIT_LIST_HEAD(&splice);
+ INIT_LIST_HEAD(&works);
mutex_lock(&root->fs_info->ordered_operations_mutex);
spin_lock(&root->fs_info->ordered_extent_lock);
@@ -533,6 +562,7 @@ again:
list_splice_init(&root->fs_info->ordered_operations, &splice);
while (!list_empty(&splice)) {
+
btrfs_inode = list_entry(splice.next, struct btrfs_inode,
ordered_operations);
@@ -549,15 +579,26 @@ again:
list_add_tail(&BTRFS_I(inode)->ordered_operations,
&root->fs_info->ordered_operations);
}
+
+ if (!inode)
+ continue;
spin_unlock(&root->fs_info->ordered_extent_lock);
- if (inode) {
- if (wait)
- btrfs_wait_ordered_range(inode, 0, (u64)-1);
- else
- filemap_flush(inode->i_mapping);
- btrfs_add_delayed_iput(inode);
+ work = btrfs_alloc_delalloc_work(inode, wait, 1);
+ if (!work) {
+ if (list_empty(&BTRFS_I(inode)->ordered_operations))
+ list_add_tail(&btrfs_inode->ordered_operations,
+ &splice);
+ spin_lock(&root->fs_info->ordered_extent_lock);
+ list_splice_tail(&splice,
+ &root->fs_info->ordered_operations);
+ spin_unlock(&root->fs_info->ordered_extent_lock);
+ ret = -ENOMEM;
+ goto out;
}
+ list_add_tail(&work->list, &works);
+ btrfs_queue_worker(&root->fs_info->flush_workers,
+ &work->work);
cond_resched();
spin_lock(&root->fs_info->ordered_extent_lock);
@@ -566,7 +607,13 @@ again:
goto again;
spin_unlock(&root->fs_info->ordered_extent_lock);
+out:
+ list_for_each_entry_safe(work, next, &works, list) {
+ list_del_init(&work->list);
+ btrfs_wait_and_free_delalloc_work(work);
+ }
mutex_unlock(&root->fs_info->ordered_operations_mutex);
+ return ret;
}
/*
@@ -606,7 +653,6 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
u64 end;
u64 orig_end;
struct btrfs_ordered_extent *ordered;
- int found;
if (start + len < start) {
orig_end = INT_LIMIT(loff_t);
@@ -642,7 +688,6 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
filemap_fdatawait_range(inode->i_mapping, start, orig_end);
end = orig_end;
- found = 0;
while (1) {
ordered = btrfs_lookup_first_ordered_extent(inode, end);
if (!ordered)
@@ -655,7 +700,6 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
btrfs_put_ordered_extent(ordered);
break;
}
- found++;
btrfs_start_ordered_extent(inode, ordered, 1);
end = ordered->file_offset;
btrfs_put_ordered_extent(ordered);
@@ -934,15 +978,6 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
if (last_mod < root->fs_info->last_trans_committed)
return;
- /*
- * the transaction is already committing. Just start the IO and
- * don't bother with all of this list nonsense
- */
- if (trans && root->fs_info->running_transaction->blocked) {
- btrfs_wait_ordered_range(inode, 0, (u64)-1);
- return;
- }
-
spin_lock(&root->fs_info->ordered_extent_lock);
if (list_empty(&BTRFS_I(inode)->ordered_operations)) {
list_add_tail(&BTRFS_I(inode)->ordered_operations,
@@ -959,6 +994,7 @@ int __init ordered_data_init(void)
NULL);
if (!btrfs_ordered_extent_cache)
return -ENOMEM;
+
return 0;
}
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 853fc7beedfa..f29d4bf5fbe7 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -128,8 +128,11 @@ struct btrfs_ordered_extent {
struct list_head root_extent_list;
struct btrfs_work work;
-};
+ struct completion completion;
+ struct btrfs_work flush_work;
+ struct list_head work_list;
+};
/*
* calculates the total size you need to allocate for an ordered sum
@@ -186,7 +189,7 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum);
-void btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
+int btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode);
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 5e23684887eb..50d95fd190a5 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -297,6 +297,9 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
case BTRFS_DEV_STATS_KEY:
printk(KERN_INFO "\t\tdevice stats\n");
break;
+ case BTRFS_DEV_REPLACE_KEY:
+ printk(KERN_INFO "\t\tdev replace\n");
+ break;
};
}
}
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index fe9d02c45f8e..a5c856234323 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -379,6 +379,13 @@ next1:
ret = add_relation_rb(fs_info, found_key.objectid,
found_key.offset);
+ if (ret == -ENOENT) {
+ printk(KERN_WARNING
+ "btrfs: orphan qgroup relation 0x%llx->0x%llx\n",
+ (unsigned long long)found_key.objectid,
+ (unsigned long long)found_key.offset);
+ ret = 0; /* ignore the error */
+ }
if (ret)
goto out;
next2:
@@ -956,17 +963,28 @@ int btrfs_remove_qgroup(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 qgroupid)
{
struct btrfs_root *quota_root;
+ struct btrfs_qgroup *qgroup;
int ret = 0;
quota_root = fs_info->quota_root;
if (!quota_root)
return -EINVAL;
+ /* check if there are no relations to this qgroup */
+ spin_lock(&fs_info->qgroup_lock);
+ qgroup = find_qgroup_rb(fs_info, qgroupid);
+ if (qgroup) {
+ if (!list_empty(&qgroup->groups) || !list_empty(&qgroup->members)) {
+ spin_unlock(&fs_info->qgroup_lock);
+ return -EBUSY;
+ }
+ }
+ spin_unlock(&fs_info->qgroup_lock);
+
ret = del_qgroup_item(trans, quota_root, qgroupid);
spin_lock(&fs_info->qgroup_lock);
del_qgroup_rb(quota_root->fs_info, qgroupid);
-
spin_unlock(&fs_info->qgroup_lock);
return ret;
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index a955669519a2..96b93daa0bbb 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -27,6 +27,7 @@
#include "volumes.h"
#include "disk-io.h"
#include "transaction.h"
+#include "dev-replace.h"
#undef DEBUG
@@ -323,7 +324,6 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
struct reada_extent *re = NULL;
struct reada_extent *re_exist = NULL;
struct btrfs_fs_info *fs_info = root->fs_info;
- struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct btrfs_bio *bbio = NULL;
struct btrfs_device *dev;
struct btrfs_device *prev_dev;
@@ -332,6 +332,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
int nzones = 0;
int i;
unsigned long index = logical >> PAGE_CACHE_SHIFT;
+ int dev_replace_is_ongoing;
spin_lock(&fs_info->reada_lock);
re = radix_tree_lookup(&fs_info->reada_tree, index);
@@ -358,7 +359,8 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
* map block
*/
length = blocksize;
- ret = btrfs_map_block(map_tree, REQ_WRITE, logical, &length, &bbio, 0);
+ ret = btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS, logical, &length,
+ &bbio, 0);
if (ret || !bbio || length < blocksize)
goto error;
@@ -393,6 +395,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
}
/* insert extent in reada_tree + all per-device trees, all or nothing */
+ btrfs_dev_replace_lock(&fs_info->dev_replace);
spin_lock(&fs_info->reada_lock);
ret = radix_tree_insert(&fs_info->reada_tree, index, re);
if (ret == -EEXIST) {
@@ -400,13 +403,17 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
BUG_ON(!re_exist);
re_exist->refcnt++;
spin_unlock(&fs_info->reada_lock);
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
goto error;
}
if (ret) {
spin_unlock(&fs_info->reada_lock);
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
goto error;
}
prev_dev = NULL;
+ dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(
+ &fs_info->dev_replace);
for (i = 0; i < nzones; ++i) {
dev = bbio->stripes[i].dev;
if (dev == prev_dev) {
@@ -419,21 +426,36 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
*/
continue;
}
+ if (!dev->bdev) {
+ /* cannot read ahead on missing device */
+ continue;
+ }
+ if (dev_replace_is_ongoing &&
+ dev == fs_info->dev_replace.tgtdev) {
+ /*
+ * as this device is selected for reading only as
+ * a last resort, skip it for read ahead.
+ */
+ continue;
+ }
prev_dev = dev;
ret = radix_tree_insert(&dev->reada_extents, index, re);
if (ret) {
while (--i >= 0) {
dev = bbio->stripes[i].dev;
BUG_ON(dev == NULL);
+ /* ignore whether the entry was inserted */
radix_tree_delete(&dev->reada_extents, index);
}
BUG_ON(fs_info == NULL);
radix_tree_delete(&fs_info->reada_tree, index);
spin_unlock(&fs_info->reada_lock);
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
goto error;
}
}
spin_unlock(&fs_info->reada_lock);
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
kfree(bbio);
return re;
@@ -915,7 +937,10 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
generation = btrfs_header_generation(node);
free_extent_buffer(node);
- reada_add_block(rc, start, &max_key, level, generation);
+ if (reada_add_block(rc, start, &max_key, level, generation)) {
+ kfree(rc);
+ return ERR_PTR(-ENOMEM);
+ }
reada_start_machine(root->fs_info);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index c188e815a733..17c306bf177a 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2025,7 +2025,6 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
struct btrfs_root_item *root_item;
struct btrfs_path *path;
struct extent_buffer *leaf;
- unsigned long nr;
int level;
int max_level;
int replaced = 0;
@@ -2074,7 +2073,8 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
BUG_ON(IS_ERR(trans));
trans->block_rsv = rc->block_rsv;
- ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved);
+ ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret) {
BUG_ON(ret != -EAGAIN);
ret = btrfs_commit_transaction(trans, root);
@@ -2125,10 +2125,9 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
path->slots[level]);
root_item->drop_level = level;
- nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
if (replaced && rc->stage == UPDATE_DATA_PTRS)
invalidate_extent_cache(root, &key, &next_key);
@@ -2155,10 +2154,9 @@ out:
btrfs_update_reloc_root(trans, root);
}
- nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
if (replaced && rc->stage == UPDATE_DATA_PTRS)
invalidate_extent_cache(root, &key, &next_key);
@@ -2184,7 +2182,8 @@ int prepare_to_merge(struct reloc_control *rc, int err)
again:
if (!err) {
num_bytes = rc->merging_rsv_size;
- ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes);
+ ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret)
err = ret;
}
@@ -2459,7 +2458,8 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans,
num_bytes = calcu_metadata_size(rc, node, 1) * 2;
trans->block_rsv = rc->block_rsv;
- ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes);
+ ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret) {
if (ret == -EAGAIN)
rc->commit_transaction = 1;
@@ -3259,7 +3259,6 @@ static int delete_block_group_cache(struct btrfs_fs_info *fs_info,
struct btrfs_path *path;
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_trans_handle *trans;
- unsigned long nr;
int ret = 0;
if (inode)
@@ -3293,9 +3292,8 @@ truncate:
ret = btrfs_truncate_free_space_cache(root, trans, path, inode);
btrfs_free_path(path);
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
out:
iput(inode);
return ret;
@@ -3685,7 +3683,8 @@ int prepare_to_relocate(struct reloc_control *rc)
* is no reservation in transaction handle.
*/
ret = btrfs_block_rsv_add(rc->extent_root, rc->block_rsv,
- rc->extent_root->nodesize * 256);
+ rc->extent_root->nodesize * 256,
+ BTRFS_RESERVE_FLUSH_ALL);
if (ret)
return ret;
@@ -3711,7 +3710,6 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
struct btrfs_trans_handle *trans = NULL;
struct btrfs_path *path;
struct btrfs_extent_item *ei;
- unsigned long nr;
u64 flags;
u32 item_size;
int ret;
@@ -3828,9 +3826,8 @@ restart:
ret = btrfs_commit_transaction(trans, rc->extent_root);
BUG_ON(ret);
} else {
- nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, rc->extent_root);
- btrfs_btree_balance_dirty(rc->extent_root, nr);
+ btrfs_btree_balance_dirty(rc->extent_root);
}
trans = NULL;
@@ -3860,9 +3857,8 @@ restart:
GFP_NOFS);
if (trans) {
- nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, rc->extent_root);
- btrfs_btree_balance_dirty(rc->extent_root, nr);
+ btrfs_btree_balance_dirty(rc->extent_root);
}
if (!err) {
@@ -3941,7 +3937,6 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans;
struct btrfs_root *root;
struct btrfs_key key;
- unsigned long nr;
u64 objectid = BTRFS_FIRST_FREE_OBJECTID;
int err = 0;
@@ -3969,9 +3964,8 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
err = btrfs_orphan_add(trans, inode);
out:
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(root, nr);
+ btrfs_btree_balance_dirty(root);
if (err) {
if (inode)
iput(inode);
@@ -4057,7 +4051,11 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
(unsigned long long)rc->block_group->key.objectid,
(unsigned long long)rc->block_group->flags);
- btrfs_start_delalloc_inodes(fs_info->tree_root, 0);
+ ret = btrfs_start_delalloc_inodes(fs_info->tree_root, 0);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
btrfs_wait_ordered_extents(fs_info->tree_root, 0);
while (1) {
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index eb923d087da7..668af537a3ea 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -548,9 +548,9 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans,
struct btrfs_root_item *item = &root->root_item;
struct timespec ct = CURRENT_TIME;
- spin_lock(&root->root_times_lock);
+ spin_lock(&root->root_item_lock);
item->ctransid = cpu_to_le64(trans->transid);
item->ctime.sec = cpu_to_le64(ct.tv_sec);
item->ctime.nsec = cpu_to_le32(ct.tv_nsec);
- spin_unlock(&root->root_times_lock);
+ spin_unlock(&root->root_item_lock);
}
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 27892f67e69b..bdbb94f245c9 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2011 STRATO. All rights reserved.
+ * Copyright (C) 2011, 2012 STRATO. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
@@ -25,6 +25,7 @@
#include "transaction.h"
#include "backref.h"
#include "extent_io.h"
+#include "dev-replace.h"
#include "check-integrity.h"
#include "rcu-string.h"
@@ -42,10 +43,23 @@
*/
struct scrub_block;
-struct scrub_dev;
+struct scrub_ctx;
-#define SCRUB_PAGES_PER_BIO 16 /* 64k per bio */
-#define SCRUB_BIOS_PER_DEV 16 /* 1 MB per device in flight */
+/*
+ * the following three values only influence the performance.
+ * The last one configures the number of parallel and outstanding I/O
+ * operations. The first two values configure an upper limit for the number
+ * of (dynamically allocated) pages that are added to a bio.
+ */
+#define SCRUB_PAGES_PER_RD_BIO 32 /* 128k per bio */
+#define SCRUB_PAGES_PER_WR_BIO 32 /* 128k per bio */
+#define SCRUB_BIOS_PER_SCTX 64 /* 8MB per device in flight */
+
+/*
+ * the following value times PAGE_SIZE needs to be large enough to match the
+ * largest node/leaf/sector size that shall be supported.
+ * Values larger than BTRFS_STRIPE_LEN are not supported.
+ */
#define SCRUB_MAX_PAGES_PER_BLOCK 16 /* 64k per node/leaf/sector */
struct scrub_page {
@@ -56,6 +70,8 @@ struct scrub_page {
u64 generation;
u64 logical;
u64 physical;
+ u64 physical_for_dev_replace;
+ atomic_t ref_count;
struct {
unsigned int mirror_num:8;
unsigned int have_csum:1;
@@ -66,23 +82,28 @@ struct scrub_page {
struct scrub_bio {
int index;
- struct scrub_dev *sdev;
+ struct scrub_ctx *sctx;
+ struct btrfs_device *dev;
struct bio *bio;
int err;
u64 logical;
u64 physical;
- struct scrub_page *pagev[SCRUB_PAGES_PER_BIO];
+#if SCRUB_PAGES_PER_WR_BIO >= SCRUB_PAGES_PER_RD_BIO
+ struct scrub_page *pagev[SCRUB_PAGES_PER_WR_BIO];
+#else
+ struct scrub_page *pagev[SCRUB_PAGES_PER_RD_BIO];
+#endif
int page_count;
int next_free;
struct btrfs_work work;
};
struct scrub_block {
- struct scrub_page pagev[SCRUB_MAX_PAGES_PER_BLOCK];
+ struct scrub_page *pagev[SCRUB_MAX_PAGES_PER_BLOCK];
int page_count;
atomic_t outstanding_pages;
atomic_t ref_count; /* free mem on transition to zero */
- struct scrub_dev *sdev;
+ struct scrub_ctx *sctx;
struct {
unsigned int header_error:1;
unsigned int checksum_error:1;
@@ -91,23 +112,35 @@ struct scrub_block {
};
};
-struct scrub_dev {
- struct scrub_bio *bios[SCRUB_BIOS_PER_DEV];
- struct btrfs_device *dev;
+struct scrub_wr_ctx {
+ struct scrub_bio *wr_curr_bio;
+ struct btrfs_device *tgtdev;
+ int pages_per_wr_bio; /* <= SCRUB_PAGES_PER_WR_BIO */
+ atomic_t flush_all_writes;
+ struct mutex wr_lock;
+};
+
+struct scrub_ctx {
+ struct scrub_bio *bios[SCRUB_BIOS_PER_SCTX];
+ struct btrfs_root *dev_root;
int first_free;
int curr;
- atomic_t in_flight;
- atomic_t fixup_cnt;
+ atomic_t bios_in_flight;
+ atomic_t workers_pending;
spinlock_t list_lock;
wait_queue_head_t list_wait;
u16 csum_size;
struct list_head csum_list;
atomic_t cancel_req;
int readonly;
- int pages_per_bio; /* <= SCRUB_PAGES_PER_BIO */
+ int pages_per_rd_bio;
u32 sectorsize;
u32 nodesize;
u32 leafsize;
+
+ int is_dev_replace;
+ struct scrub_wr_ctx wr_ctx;
+
/*
* statistics
*/
@@ -116,13 +149,23 @@ struct scrub_dev {
};
struct scrub_fixup_nodatasum {
- struct scrub_dev *sdev;
+ struct scrub_ctx *sctx;
+ struct btrfs_device *dev;
u64 logical;
struct btrfs_root *root;
struct btrfs_work work;
int mirror_num;
};
+struct scrub_copy_nocow_ctx {
+ struct scrub_ctx *sctx;
+ u64 logical;
+ u64 len;
+ int mirror_num;
+ u64 physical_for_dev_replace;
+ struct btrfs_work work;
+};
+
struct scrub_warning {
struct btrfs_path *path;
u64 extent_item_size;
@@ -137,15 +180,20 @@ struct scrub_warning {
};
+static void scrub_pending_bio_inc(struct scrub_ctx *sctx);
+static void scrub_pending_bio_dec(struct scrub_ctx *sctx);
+static void scrub_pending_trans_workers_inc(struct scrub_ctx *sctx);
+static void scrub_pending_trans_workers_dec(struct scrub_ctx *sctx);
static int scrub_handle_errored_block(struct scrub_block *sblock_to_check);
-static int scrub_setup_recheck_block(struct scrub_dev *sdev,
- struct btrfs_mapping_tree *map_tree,
+static int scrub_setup_recheck_block(struct scrub_ctx *sctx,
+ struct btrfs_fs_info *fs_info,
+ struct scrub_block *original_sblock,
u64 length, u64 logical,
- struct scrub_block *sblock);
-static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock, int is_metadata,
- int have_csum, u8 *csum, u64 generation,
- u16 csum_size);
+ struct scrub_block *sblocks_for_recheck);
+static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
+ struct scrub_block *sblock, int is_metadata,
+ int have_csum, u8 *csum, u64 generation,
+ u16 csum_size);
static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
struct scrub_block *sblock,
int is_metadata, int have_csum,
@@ -158,118 +206,221 @@ static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad,
static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
struct scrub_block *sblock_good,
int page_num, int force_write);
+static void scrub_write_block_to_dev_replace(struct scrub_block *sblock);
+static int scrub_write_page_to_dev_replace(struct scrub_block *sblock,
+ int page_num);
static int scrub_checksum_data(struct scrub_block *sblock);
static int scrub_checksum_tree_block(struct scrub_block *sblock);
static int scrub_checksum_super(struct scrub_block *sblock);
static void scrub_block_get(struct scrub_block *sblock);
static void scrub_block_put(struct scrub_block *sblock);
-static int scrub_add_page_to_bio(struct scrub_dev *sdev,
- struct scrub_page *spage);
-static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len,
- u64 physical, u64 flags, u64 gen, int mirror_num,
- u8 *csum, int force);
+static void scrub_page_get(struct scrub_page *spage);
+static void scrub_page_put(struct scrub_page *spage);
+static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx,
+ struct scrub_page *spage);
+static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
+ u64 physical, struct btrfs_device *dev, u64 flags,
+ u64 gen, int mirror_num, u8 *csum, int force,
+ u64 physical_for_dev_replace);
static void scrub_bio_end_io(struct bio *bio, int err);
static void scrub_bio_end_io_worker(struct btrfs_work *work);
static void scrub_block_complete(struct scrub_block *sblock);
+static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
+ u64 extent_logical, u64 extent_len,
+ u64 *extent_physical,
+ struct btrfs_device **extent_dev,
+ int *extent_mirror_num);
+static int scrub_setup_wr_ctx(struct scrub_ctx *sctx,
+ struct scrub_wr_ctx *wr_ctx,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_device *dev,
+ int is_dev_replace);
+static void scrub_free_wr_ctx(struct scrub_wr_ctx *wr_ctx);
+static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
+ struct scrub_page *spage);
+static void scrub_wr_submit(struct scrub_ctx *sctx);
+static void scrub_wr_bio_end_io(struct bio *bio, int err);
+static void scrub_wr_bio_end_io_worker(struct btrfs_work *work);
+static int write_page_nocow(struct scrub_ctx *sctx,
+ u64 physical_for_dev_replace, struct page *page);
+static int copy_nocow_pages_for_inode(u64 inum, u64 offset, u64 root,
+ void *ctx);
+static int copy_nocow_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
+ int mirror_num, u64 physical_for_dev_replace);
+static void copy_nocow_pages_worker(struct btrfs_work *work);
+
+
+static void scrub_pending_bio_inc(struct scrub_ctx *sctx)
+{
+ atomic_inc(&sctx->bios_in_flight);
+}
+
+static void scrub_pending_bio_dec(struct scrub_ctx *sctx)
+{
+ atomic_dec(&sctx->bios_in_flight);
+ wake_up(&sctx->list_wait);
+}
+
+/*
+ * used for workers that require transaction commits (i.e., for the
+ * NOCOW case)
+ */
+static void scrub_pending_trans_workers_inc(struct scrub_ctx *sctx)
+{
+ struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
+
+ /*
+ * increment scrubs_running to prevent cancel requests from
+ * completing as long as a worker is running. we must also
+ * increment scrubs_paused to prevent deadlocking on pause
+ * requests used for transactions commits (as the worker uses a
+ * transaction context). it is safe to regard the worker
+ * as paused for all matters practical. effectively, we only
+ * avoid cancellation requests from completing.
+ */
+ mutex_lock(&fs_info->scrub_lock);
+ atomic_inc(&fs_info->scrubs_running);
+ atomic_inc(&fs_info->scrubs_paused);
+ mutex_unlock(&fs_info->scrub_lock);
+ atomic_inc(&sctx->workers_pending);
+}
+/* used for workers that require transaction commits */
+static void scrub_pending_trans_workers_dec(struct scrub_ctx *sctx)
+{
+ struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
-static void scrub_free_csums(struct scrub_dev *sdev)
+ /*
+ * see scrub_pending_trans_workers_inc() why we're pretending
+ * to be paused in the scrub counters
+ */
+ mutex_lock(&fs_info->scrub_lock);
+ atomic_dec(&fs_info->scrubs_running);
+ atomic_dec(&fs_info->scrubs_paused);
+ mutex_unlock(&fs_info->scrub_lock);
+ atomic_dec(&sctx->workers_pending);
+ wake_up(&fs_info->scrub_pause_wait);
+ wake_up(&sctx->list_wait);
+}
+
+static void scrub_free_csums(struct scrub_ctx *sctx)
{
- while (!list_empty(&sdev->csum_list)) {
+ while (!list_empty(&sctx->csum_list)) {
struct btrfs_ordered_sum *sum;
- sum = list_first_entry(&sdev->csum_list,
+ sum = list_first_entry(&sctx->csum_list,
struct btrfs_ordered_sum, list);
list_del(&sum->list);
kfree(sum);
}
}
-static noinline_for_stack void scrub_free_dev(struct scrub_dev *sdev)
+static noinline_for_stack void scrub_free_ctx(struct scrub_ctx *sctx)
{
int i;
- if (!sdev)
+ if (!sctx)
return;
+ scrub_free_wr_ctx(&sctx->wr_ctx);
+
/* this can happen when scrub is cancelled */
- if (sdev->curr != -1) {
- struct scrub_bio *sbio = sdev->bios[sdev->curr];
+ if (sctx->curr != -1) {
+ struct scrub_bio *sbio = sctx->bios[sctx->curr];
for (i = 0; i < sbio->page_count; i++) {
- BUG_ON(!sbio->pagev[i]);
- BUG_ON(!sbio->pagev[i]->page);
+ WARN_ON(!sbio->pagev[i]->page);
scrub_block_put(sbio->pagev[i]->sblock);
}
bio_put(sbio->bio);
}
- for (i = 0; i < SCRUB_BIOS_PER_DEV; ++i) {
- struct scrub_bio *sbio = sdev->bios[i];
+ for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) {
+ struct scrub_bio *sbio = sctx->bios[i];
if (!sbio)
break;
kfree(sbio);
}
- scrub_free_csums(sdev);
- kfree(sdev);
+ scrub_free_csums(sctx);
+ kfree(sctx);
}
static noinline_for_stack
-struct scrub_dev *scrub_setup_dev(struct btrfs_device *dev)
+struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace)
{
- struct scrub_dev *sdev;
+ struct scrub_ctx *sctx;
int i;
struct btrfs_fs_info *fs_info = dev->dev_root->fs_info;
- int pages_per_bio;
+ int pages_per_rd_bio;
+ int ret;
- pages_per_bio = min_t(int, SCRUB_PAGES_PER_BIO,
- bio_get_nr_vecs(dev->bdev));
- sdev = kzalloc(sizeof(*sdev), GFP_NOFS);
- if (!sdev)
+ /*
+ * the setting of pages_per_rd_bio is correct for scrub but might
+ * be wrong for the dev_replace code where we might read from
+ * different devices in the initial huge bios. However, that
+ * code is able to correctly handle the case when adding a page
+ * to a bio fails.
+ */
+ if (dev->bdev)
+ pages_per_rd_bio = min_t(int, SCRUB_PAGES_PER_RD_BIO,
+ bio_get_nr_vecs(dev->bdev));
+ else
+ pages_per_rd_bio = SCRUB_PAGES_PER_RD_BIO;
+ sctx = kzalloc(sizeof(*sctx), GFP_NOFS);
+ if (!sctx)
goto nomem;
- sdev->dev = dev;
- sdev->pages_per_bio = pages_per_bio;
- sdev->curr = -1;
- for (i = 0; i < SCRUB_BIOS_PER_DEV; ++i) {
+ sctx->is_dev_replace = is_dev_replace;
+ sctx->pages_per_rd_bio = pages_per_rd_bio;
+ sctx->curr = -1;
+ sctx->dev_root = dev->dev_root;
+ for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) {
struct scrub_bio *sbio;
sbio = kzalloc(sizeof(*sbio), GFP_NOFS);
if (!sbio)
goto nomem;
- sdev->bios[i] = sbio;
+ sctx->bios[i] = sbio;
sbio->index = i;
- sbio->sdev = sdev;
+ sbio->sctx = sctx;
sbio->page_count = 0;
sbio->work.func = scrub_bio_end_io_worker;
- if (i != SCRUB_BIOS_PER_DEV-1)
- sdev->bios[i]->next_free = i + 1;
+ if (i != SCRUB_BIOS_PER_SCTX - 1)
+ sctx->bios[i]->next_free = i + 1;
else
- sdev->bios[i]->next_free = -1;
- }
- sdev->first_free = 0;
- sdev->nodesize = dev->dev_root->nodesize;
- sdev->leafsize = dev->dev_root->leafsize;
- sdev->sectorsize = dev->dev_root->sectorsize;
- atomic_set(&sdev->in_flight, 0);
- atomic_set(&sdev->fixup_cnt, 0);
- atomic_set(&sdev->cancel_req, 0);
- sdev->csum_size = btrfs_super_csum_size(fs_info->super_copy);
- INIT_LIST_HEAD(&sdev->csum_list);
-
- spin_lock_init(&sdev->list_lock);
- spin_lock_init(&sdev->stat_lock);
- init_waitqueue_head(&sdev->list_wait);
- return sdev;
+ sctx->bios[i]->next_free = -1;
+ }
+ sctx->first_free = 0;
+ sctx->nodesize = dev->dev_root->nodesize;
+ sctx->leafsize = dev->dev_root->leafsize;
+ sctx->sectorsize = dev->dev_root->sectorsize;
+ atomic_set(&sctx->bios_in_flight, 0);
+ atomic_set(&sctx->workers_pending, 0);
+ atomic_set(&sctx->cancel_req, 0);
+ sctx->csum_size = btrfs_super_csum_size(fs_info->super_copy);
+ INIT_LIST_HEAD(&sctx->csum_list);
+
+ spin_lock_init(&sctx->list_lock);
+ spin_lock_init(&sctx->stat_lock);
+ init_waitqueue_head(&sctx->list_wait);
+
+ ret = scrub_setup_wr_ctx(sctx, &sctx->wr_ctx, fs_info,
+ fs_info->dev_replace.tgtdev, is_dev_replace);
+ if (ret) {
+ scrub_free_ctx(sctx);
+ return ERR_PTR(ret);
+ }
+ return sctx;
nomem:
- scrub_free_dev(sdev);
+ scrub_free_ctx(sctx);
return ERR_PTR(-ENOMEM);
}
-static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root, void *ctx)
+static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
+ void *warn_ctx)
{
u64 isize;
u32 nlink;
@@ -277,7 +428,7 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root, void *ctx)
int i;
struct extent_buffer *eb;
struct btrfs_inode_item *inode_item;
- struct scrub_warning *swarn = ctx;
+ struct scrub_warning *swarn = warn_ctx;
struct btrfs_fs_info *fs_info = swarn->dev->dev_root->fs_info;
struct inode_fs_paths *ipath = NULL;
struct btrfs_root *local_root;
@@ -345,8 +496,8 @@ err:
static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
{
- struct btrfs_device *dev = sblock->sdev->dev;
- struct btrfs_fs_info *fs_info = dev->dev_root->fs_info;
+ struct btrfs_device *dev;
+ struct btrfs_fs_info *fs_info;
struct btrfs_path *path;
struct btrfs_key found_key;
struct extent_buffer *eb;
@@ -361,15 +512,18 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
const int bufsize = 4096;
int ret;
+ WARN_ON(sblock->page_count < 1);
+ dev = sblock->pagev[0]->dev;
+ fs_info = sblock->sctx->dev_root->fs_info;
+
path = btrfs_alloc_path();
swarn.scratch_buf = kmalloc(bufsize, GFP_NOFS);
swarn.msg_buf = kmalloc(bufsize, GFP_NOFS);
- BUG_ON(sblock->page_count < 1);
- swarn.sector = (sblock->pagev[0].physical) >> 9;
- swarn.logical = sblock->pagev[0].logical;
+ swarn.sector = (sblock->pagev[0]->physical) >> 9;
+ swarn.logical = sblock->pagev[0]->logical;
swarn.errstr = errstr;
- swarn.dev = dev;
+ swarn.dev = NULL;
swarn.msg_bufsize = bufsize;
swarn.scratch_bufsize = bufsize;
@@ -405,6 +559,7 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
} while (ret != 1);
} else {
swarn.path = path;
+ swarn.dev = dev;
iterate_extent_inodes(fs_info, found_key.objectid,
extent_item_pos, 1,
scrub_print_warning_inode, &swarn);
@@ -416,11 +571,11 @@ out:
kfree(swarn.msg_buf);
}
-static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *ctx)
+static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *fixup_ctx)
{
struct page *page = NULL;
unsigned long index;
- struct scrub_fixup_nodatasum *fixup = ctx;
+ struct scrub_fixup_nodatasum *fixup = fixup_ctx;
int ret;
int corrected = 0;
struct btrfs_key key;
@@ -451,7 +606,7 @@ static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *ctx)
}
if (PageUptodate(page)) {
- struct btrfs_mapping_tree *map_tree;
+ struct btrfs_fs_info *fs_info;
if (PageDirty(page)) {
/*
* we need to write the data to the defect sector. the
@@ -472,8 +627,8 @@ static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *ctx)
ret = -EIO;
goto out;
}
- map_tree = &BTRFS_I(inode)->root->fs_info->mapping_tree;
- ret = repair_io_failure(map_tree, offset, PAGE_SIZE,
+ fs_info = BTRFS_I(inode)->root->fs_info;
+ ret = repair_io_failure(fs_info, offset, PAGE_SIZE,
fixup->logical, page,
fixup->mirror_num);
unlock_page(page);
@@ -530,21 +685,21 @@ static void scrub_fixup_nodatasum(struct btrfs_work *work)
{
int ret;
struct scrub_fixup_nodatasum *fixup;
- struct scrub_dev *sdev;
+ struct scrub_ctx *sctx;
struct btrfs_trans_handle *trans = NULL;
struct btrfs_fs_info *fs_info;
struct btrfs_path *path;
int uncorrectable = 0;
fixup = container_of(work, struct scrub_fixup_nodatasum, work);
- sdev = fixup->sdev;
+ sctx = fixup->sctx;
fs_info = fixup->root->fs_info;
path = btrfs_alloc_path();
if (!path) {
- spin_lock(&sdev->stat_lock);
- ++sdev->stat.malloc_errors;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ ++sctx->stat.malloc_errors;
+ spin_unlock(&sctx->stat_lock);
uncorrectable = 1;
goto out;
}
@@ -573,35 +728,30 @@ static void scrub_fixup_nodatasum(struct btrfs_work *work)
}
WARN_ON(ret != 1);
- spin_lock(&sdev->stat_lock);
- ++sdev->stat.corrected_errors;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ ++sctx->stat.corrected_errors;
+ spin_unlock(&sctx->stat_lock);
out:
if (trans && !IS_ERR(trans))
btrfs_end_transaction(trans, fixup->root);
if (uncorrectable) {
- spin_lock(&sdev->stat_lock);
- ++sdev->stat.uncorrectable_errors;
- spin_unlock(&sdev->stat_lock);
-
+ spin_lock(&sctx->stat_lock);
+ ++sctx->stat.uncorrectable_errors;
+ spin_unlock(&sctx->stat_lock);
+ btrfs_dev_replace_stats_inc(
+ &sctx->dev_root->fs_info->dev_replace.
+ num_uncorrectable_read_errors);
printk_ratelimited_in_rcu(KERN_ERR
"btrfs: unable to fixup (nodatasum) error at logical %llu on dev %s\n",
(unsigned long long)fixup->logical,
- rcu_str_deref(sdev->dev->name));
+ rcu_str_deref(fixup->dev->name));
}
btrfs_free_path(path);
kfree(fixup);
- /* see caller why we're pretending to be paused in the scrub counters */
- mutex_lock(&fs_info->scrub_lock);
- atomic_dec(&fs_info->scrubs_running);
- atomic_dec(&fs_info->scrubs_paused);
- mutex_unlock(&fs_info->scrub_lock);
- atomic_dec(&sdev->fixup_cnt);
- wake_up(&fs_info->scrub_pause_wait);
- wake_up(&sdev->list_wait);
+ scrub_pending_trans_workers_dec(sctx);
}
/*
@@ -614,7 +764,8 @@ out:
*/
static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
{
- struct scrub_dev *sdev = sblock_to_check->sdev;
+ struct scrub_ctx *sctx = sblock_to_check->sctx;
+ struct btrfs_device *dev;
struct btrfs_fs_info *fs_info;
u64 length;
u64 logical;
@@ -633,16 +784,33 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
DEFAULT_RATELIMIT_BURST);
BUG_ON(sblock_to_check->page_count < 1);
- fs_info = sdev->dev->dev_root->fs_info;
+ fs_info = sctx->dev_root->fs_info;
+ if (sblock_to_check->pagev[0]->flags & BTRFS_EXTENT_FLAG_SUPER) {
+ /*
+ * if we find an error in a super block, we just report it.
+ * They will get written with the next transaction commit
+ * anyway
+ */
+ spin_lock(&sctx->stat_lock);
+ ++sctx->stat.super_errors;
+ spin_unlock(&sctx->stat_lock);
+ return 0;
+ }
length = sblock_to_check->page_count * PAGE_SIZE;
- logical = sblock_to_check->pagev[0].logical;
- generation = sblock_to_check->pagev[0].generation;
- BUG_ON(sblock_to_check->pagev[0].mirror_num < 1);
- failed_mirror_index = sblock_to_check->pagev[0].mirror_num - 1;
- is_metadata = !(sblock_to_check->pagev[0].flags &
+ logical = sblock_to_check->pagev[0]->logical;
+ generation = sblock_to_check->pagev[0]->generation;
+ BUG_ON(sblock_to_check->pagev[0]->mirror_num < 1);
+ failed_mirror_index = sblock_to_check->pagev[0]->mirror_num - 1;
+ is_metadata = !(sblock_to_check->pagev[0]->flags &
BTRFS_EXTENT_FLAG_DATA);
- have_csum = sblock_to_check->pagev[0].have_csum;
- csum = sblock_to_check->pagev[0].csum;
+ have_csum = sblock_to_check->pagev[0]->have_csum;
+ csum = sblock_to_check->pagev[0]->csum;
+ dev = sblock_to_check->pagev[0]->dev;
+
+ if (sctx->is_dev_replace && !is_metadata && !have_csum) {
+ sblocks_for_recheck = NULL;
+ goto nodatasum_case;
+ }
/*
* read all mirrors one after the other. This includes to
@@ -677,43 +845,32 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
sizeof(*sblocks_for_recheck),
GFP_NOFS);
if (!sblocks_for_recheck) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.malloc_errors++;
- sdev->stat.read_errors++;
- sdev->stat.uncorrectable_errors++;
- spin_unlock(&sdev->stat_lock);
- btrfs_dev_stat_inc_and_print(sdev->dev,
- BTRFS_DEV_STAT_READ_ERRS);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ sctx->stat.read_errors++;
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
+ btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS);
goto out;
}
/* setup the context, map the logical blocks and alloc the pages */
- ret = scrub_setup_recheck_block(sdev, &fs_info->mapping_tree, length,
+ ret = scrub_setup_recheck_block(sctx, fs_info, sblock_to_check, length,
logical, sblocks_for_recheck);
if (ret) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.read_errors++;
- sdev->stat.uncorrectable_errors++;
- spin_unlock(&sdev->stat_lock);
- btrfs_dev_stat_inc_and_print(sdev->dev,
- BTRFS_DEV_STAT_READ_ERRS);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.read_errors++;
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
+ btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS);
goto out;
}
BUG_ON(failed_mirror_index >= BTRFS_MAX_MIRRORS);
sblock_bad = sblocks_for_recheck + failed_mirror_index;
/* build and submit the bios for the failed mirror, check checksums */
- ret = scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum,
- csum, generation, sdev->csum_size);
- if (ret) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.read_errors++;
- sdev->stat.uncorrectable_errors++;
- spin_unlock(&sdev->stat_lock);
- btrfs_dev_stat_inc_and_print(sdev->dev,
- BTRFS_DEV_STAT_READ_ERRS);
- goto out;
- }
+ scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum,
+ csum, generation, sctx->csum_size);
if (!sblock_bad->header_error && !sblock_bad->checksum_error &&
sblock_bad->no_io_error_seen) {
@@ -725,50 +882,54 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
* different bio (usually one of the two latter cases is
* the cause)
*/
- spin_lock(&sdev->stat_lock);
- sdev->stat.unverified_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.unverified_errors++;
+ spin_unlock(&sctx->stat_lock);
+ if (sctx->is_dev_replace)
+ scrub_write_block_to_dev_replace(sblock_bad);
goto out;
}
if (!sblock_bad->no_io_error_seen) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.read_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.read_errors++;
+ spin_unlock(&sctx->stat_lock);
if (__ratelimit(&_rs))
scrub_print_warning("i/o error", sblock_to_check);
- btrfs_dev_stat_inc_and_print(sdev->dev,
- BTRFS_DEV_STAT_READ_ERRS);
+ btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS);
} else if (sblock_bad->checksum_error) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.csum_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.csum_errors++;
+ spin_unlock(&sctx->stat_lock);
if (__ratelimit(&_rs))
scrub_print_warning("checksum error", sblock_to_check);
- btrfs_dev_stat_inc_and_print(sdev->dev,
+ btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_CORRUPTION_ERRS);
} else if (sblock_bad->header_error) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.verify_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.verify_errors++;
+ spin_unlock(&sctx->stat_lock);
if (__ratelimit(&_rs))
scrub_print_warning("checksum/header error",
sblock_to_check);
if (sblock_bad->generation_error)
- btrfs_dev_stat_inc_and_print(sdev->dev,
+ btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_GENERATION_ERRS);
else
- btrfs_dev_stat_inc_and_print(sdev->dev,
+ btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_CORRUPTION_ERRS);
}
- if (sdev->readonly)
+ if (sctx->readonly && !sctx->is_dev_replace)
goto did_not_correct_error;
if (!is_metadata && !have_csum) {
struct scrub_fixup_nodatasum *fixup_nodatasum;
+nodatasum_case:
+ WARN_ON(sctx->is_dev_replace);
+
/*
* !is_metadata and !have_csum, this means that the data
* might not be COW'ed, that it might be modified
@@ -779,24 +940,12 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
fixup_nodatasum = kzalloc(sizeof(*fixup_nodatasum), GFP_NOFS);
if (!fixup_nodatasum)
goto did_not_correct_error;
- fixup_nodatasum->sdev = sdev;
+ fixup_nodatasum->sctx = sctx;
+ fixup_nodatasum->dev = dev;
fixup_nodatasum->logical = logical;
fixup_nodatasum->root = fs_info->extent_root;
fixup_nodatasum->mirror_num = failed_mirror_index + 1;
- /*
- * increment scrubs_running to prevent cancel requests from
- * completing as long as a fixup worker is running. we must also
- * increment scrubs_paused to prevent deadlocking on pause
- * requests used for transactions commits (as the worker uses a
- * transaction context). it is safe to regard the fixup worker
- * as paused for all matters practical. effectively, we only
- * avoid cancellation requests from completing.
- */
- mutex_lock(&fs_info->scrub_lock);
- atomic_inc(&fs_info->scrubs_running);
- atomic_inc(&fs_info->scrubs_paused);
- mutex_unlock(&fs_info->scrub_lock);
- atomic_inc(&sdev->fixup_cnt);
+ scrub_pending_trans_workers_inc(sctx);
fixup_nodatasum->work.func = scrub_fixup_nodatasum;
btrfs_queue_worker(&fs_info->scrub_workers,
&fixup_nodatasum->work);
@@ -805,26 +954,8 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
/*
* now build and submit the bios for the other mirrors, check
- * checksums
- */
- for (mirror_index = 0;
- mirror_index < BTRFS_MAX_MIRRORS &&
- sblocks_for_recheck[mirror_index].page_count > 0;
- mirror_index++) {
- if (mirror_index == failed_mirror_index)
- continue;
-
- /* build and submit the bios, check checksums */
- ret = scrub_recheck_block(fs_info,
- sblocks_for_recheck + mirror_index,
- is_metadata, have_csum, csum,
- generation, sdev->csum_size);
- if (ret)
- goto did_not_correct_error;
- }
-
- /*
- * first try to pick the mirror which is completely without I/O
+ * checksums.
+ * First try to pick the mirror which is completely without I/O
* errors and also does not have a checksum error.
* If one is found, and if a checksum is present, the full block
* that is known to contain an error is rewritten. Afterwards
@@ -840,24 +971,93 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
mirror_index < BTRFS_MAX_MIRRORS &&
sblocks_for_recheck[mirror_index].page_count > 0;
mirror_index++) {
- struct scrub_block *sblock_other = sblocks_for_recheck +
- mirror_index;
+ struct scrub_block *sblock_other;
+
+ if (mirror_index == failed_mirror_index)
+ continue;
+ sblock_other = sblocks_for_recheck + mirror_index;
+
+ /* build and submit the bios, check checksums */
+ scrub_recheck_block(fs_info, sblock_other, is_metadata,
+ have_csum, csum, generation,
+ sctx->csum_size);
if (!sblock_other->header_error &&
!sblock_other->checksum_error &&
sblock_other->no_io_error_seen) {
- int force_write = is_metadata || have_csum;
-
- ret = scrub_repair_block_from_good_copy(sblock_bad,
- sblock_other,
- force_write);
+ if (sctx->is_dev_replace) {
+ scrub_write_block_to_dev_replace(sblock_other);
+ } else {
+ int force_write = is_metadata || have_csum;
+
+ ret = scrub_repair_block_from_good_copy(
+ sblock_bad, sblock_other,
+ force_write);
+ }
if (0 == ret)
goto corrected_error;
}
}
/*
- * in case of I/O errors in the area that is supposed to be
+ * for dev_replace, pick good pages and write to the target device.
+ */
+ if (sctx->is_dev_replace) {
+ success = 1;
+ for (page_num = 0; page_num < sblock_bad->page_count;
+ page_num++) {
+ int sub_success;
+
+ sub_success = 0;
+ for (mirror_index = 0;
+ mirror_index < BTRFS_MAX_MIRRORS &&
+ sblocks_for_recheck[mirror_index].page_count > 0;
+ mirror_index++) {
+ struct scrub_block *sblock_other =
+ sblocks_for_recheck + mirror_index;
+ struct scrub_page *page_other =
+ sblock_other->pagev[page_num];
+
+ if (!page_other->io_error) {
+ ret = scrub_write_page_to_dev_replace(
+ sblock_other, page_num);
+ if (ret == 0) {
+ /* succeeded for this page */
+ sub_success = 1;
+ break;
+ } else {
+ btrfs_dev_replace_stats_inc(
+ &sctx->dev_root->
+ fs_info->dev_replace.
+ num_write_errors);
+ }
+ }
+ }
+
+ if (!sub_success) {
+ /*
+ * did not find a mirror to fetch the page
+ * from. scrub_write_page_to_dev_replace()
+ * handles this case (page->io_error), by
+ * filling the block with zeros before
+ * submitting the write request
+ */
+ success = 0;
+ ret = scrub_write_page_to_dev_replace(
+ sblock_bad, page_num);
+ if (ret)
+ btrfs_dev_replace_stats_inc(
+ &sctx->dev_root->fs_info->
+ dev_replace.num_write_errors);
+ }
+ }
+
+ goto out;
+ }
+
+ /*
+ * for regular scrub, repair those pages that are errored.
+ * In case of I/O errors in the area that is supposed to be
* repaired, continue by picking good copies of those pages.
* Select the good pages from mirrors to rewrite bad pages from
* the area to fix. Afterwards verify the checksum of the block
@@ -887,7 +1087,7 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
success = 1;
for (page_num = 0; page_num < sblock_bad->page_count; page_num++) {
- struct scrub_page *page_bad = sblock_bad->pagev + page_num;
+ struct scrub_page *page_bad = sblock_bad->pagev[page_num];
if (!page_bad->io_error)
continue;
@@ -898,8 +1098,8 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
mirror_index++) {
struct scrub_block *sblock_other = sblocks_for_recheck +
mirror_index;
- struct scrub_page *page_other = sblock_other->pagev +
- page_num;
+ struct scrub_page *page_other = sblock_other->pagev[
+ page_num];
if (!page_other->io_error) {
ret = scrub_repair_page_from_good_copy(
@@ -928,10 +1128,10 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
* is verified, but most likely the data comes out
* of the page cache.
*/
- ret = scrub_recheck_block(fs_info, sblock_bad,
- is_metadata, have_csum, csum,
- generation, sdev->csum_size);
- if (!ret && !sblock_bad->header_error &&
+ scrub_recheck_block(fs_info, sblock_bad,
+ is_metadata, have_csum, csum,
+ generation, sctx->csum_size);
+ if (!sblock_bad->header_error &&
!sblock_bad->checksum_error &&
sblock_bad->no_io_error_seen)
goto corrected_error;
@@ -939,23 +1139,23 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
goto did_not_correct_error;
} else {
corrected_error:
- spin_lock(&sdev->stat_lock);
- sdev->stat.corrected_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.corrected_errors++;
+ spin_unlock(&sctx->stat_lock);
printk_ratelimited_in_rcu(KERN_ERR
"btrfs: fixed up error at logical %llu on dev %s\n",
(unsigned long long)logical,
- rcu_str_deref(sdev->dev->name));
+ rcu_str_deref(dev->name));
}
} else {
did_not_correct_error:
- spin_lock(&sdev->stat_lock);
- sdev->stat.uncorrectable_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.uncorrectable_errors++;
+ spin_unlock(&sctx->stat_lock);
printk_ratelimited_in_rcu(KERN_ERR
"btrfs: unable to fixup (regular) error at logical %llu on dev %s\n",
(unsigned long long)logical,
- rcu_str_deref(sdev->dev->name));
+ rcu_str_deref(dev->name));
}
out:
@@ -966,11 +1166,11 @@ out:
mirror_index;
int page_index;
- for (page_index = 0; page_index < SCRUB_PAGES_PER_BIO;
- page_index++)
- if (sblock->pagev[page_index].page)
- __free_page(
- sblock->pagev[page_index].page);
+ for (page_index = 0; page_index < sblock->page_count;
+ page_index++) {
+ sblock->pagev[page_index]->sblock = NULL;
+ scrub_page_put(sblock->pagev[page_index]);
+ }
}
kfree(sblocks_for_recheck);
}
@@ -978,8 +1178,9 @@ out:
return 0;
}
-static int scrub_setup_recheck_block(struct scrub_dev *sdev,
- struct btrfs_mapping_tree *map_tree,
+static int scrub_setup_recheck_block(struct scrub_ctx *sctx,
+ struct btrfs_fs_info *fs_info,
+ struct scrub_block *original_sblock,
u64 length, u64 logical,
struct scrub_block *sblocks_for_recheck)
{
@@ -988,7 +1189,7 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev,
int ret;
/*
- * note: the three members sdev, ref_count and outstanding_pages
+ * note: the two members ref_count and outstanding_pages
* are not used (and not set) in the blocks that are used for
* the recheck procedure
*/
@@ -1003,14 +1204,14 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev,
* with a length of PAGE_SIZE, each returned stripe
* represents one mirror
*/
- ret = btrfs_map_block(map_tree, WRITE, logical, &mapped_length,
- &bbio, 0);
+ ret = btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS, logical,
+ &mapped_length, &bbio, 0);
if (ret || !bbio || mapped_length < sublen) {
kfree(bbio);
return -EIO;
}
- BUG_ON(page_index >= SCRUB_PAGES_PER_BIO);
+ BUG_ON(page_index >= SCRUB_PAGES_PER_RD_BIO);
for (mirror_index = 0; mirror_index < (int)bbio->num_stripes;
mirror_index++) {
struct scrub_block *sblock;
@@ -1020,21 +1221,31 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev,
continue;
sblock = sblocks_for_recheck + mirror_index;
- page = sblock->pagev + page_index;
+ sblock->sctx = sctx;
+ page = kzalloc(sizeof(*page), GFP_NOFS);
+ if (!page) {
+leave_nomem:
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
+ kfree(bbio);
+ return -ENOMEM;
+ }
+ scrub_page_get(page);
+ sblock->pagev[page_index] = page;
page->logical = logical;
page->physical = bbio->stripes[mirror_index].physical;
+ BUG_ON(page_index >= original_sblock->page_count);
+ page->physical_for_dev_replace =
+ original_sblock->pagev[page_index]->
+ physical_for_dev_replace;
/* for missing devices, dev->bdev is NULL */
page->dev = bbio->stripes[mirror_index].dev;
page->mirror_num = mirror_index + 1;
- page->page = alloc_page(GFP_NOFS);
- if (!page->page) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.malloc_errors++;
- spin_unlock(&sdev->stat_lock);
- kfree(bbio);
- return -ENOMEM;
- }
sblock->page_count++;
+ page->page = alloc_page(GFP_NOFS);
+ if (!page->page)
+ goto leave_nomem;
}
kfree(bbio);
length -= sublen;
@@ -1052,10 +1263,10 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev,
* to take those pages that are not errored from all the mirrors so that
* the pages that are errored in the just handled mirror can be repaired.
*/
-static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
- struct scrub_block *sblock, int is_metadata,
- int have_csum, u8 *csum, u64 generation,
- u16 csum_size)
+static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
+ struct scrub_block *sblock, int is_metadata,
+ int have_csum, u8 *csum, u64 generation,
+ u16 csum_size)
{
int page_num;
@@ -1065,8 +1276,7 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
for (page_num = 0; page_num < sblock->page_count; page_num++) {
struct bio *bio;
- int ret;
- struct scrub_page *page = sblock->pagev + page_num;
+ struct scrub_page *page = sblock->pagev[page_num];
DECLARE_COMPLETION_ONSTACK(complete);
if (page->dev->bdev == NULL) {
@@ -1075,20 +1285,19 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
continue;
}
- BUG_ON(!page->page);
+ WARN_ON(!page->page);
bio = bio_alloc(GFP_NOFS, 1);
- if (!bio)
- return -EIO;
+ if (!bio) {
+ page->io_error = 1;
+ sblock->no_io_error_seen = 0;
+ continue;
+ }
bio->bi_bdev = page->dev->bdev;
bio->bi_sector = page->physical >> 9;
bio->bi_end_io = scrub_complete_bio_end_io;
bio->bi_private = &complete;
- ret = bio_add_page(bio, page->page, PAGE_SIZE, 0);
- if (PAGE_SIZE != ret) {
- bio_put(bio);
- return -EIO;
- }
+ bio_add_page(bio, page->page, PAGE_SIZE, 0);
btrfsic_submit_bio(READ, bio);
/* this will also unplug the queue */
@@ -1105,7 +1314,7 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info,
have_csum, csum, generation,
csum_size);
- return 0;
+ return;
}
static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
@@ -1120,14 +1329,14 @@ static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
struct btrfs_root *root = fs_info->extent_root;
void *mapped_buffer;
- BUG_ON(!sblock->pagev[0].page);
+ WARN_ON(!sblock->pagev[0]->page);
if (is_metadata) {
struct btrfs_header *h;
- mapped_buffer = kmap_atomic(sblock->pagev[0].page);
+ mapped_buffer = kmap_atomic(sblock->pagev[0]->page);
h = (struct btrfs_header *)mapped_buffer;
- if (sblock->pagev[0].logical != le64_to_cpu(h->bytenr) ||
+ if (sblock->pagev[0]->logical != le64_to_cpu(h->bytenr) ||
memcmp(h->fsid, fs_info->fsid, BTRFS_UUID_SIZE) ||
memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid,
BTRFS_UUID_SIZE)) {
@@ -1141,7 +1350,7 @@ static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
if (!have_csum)
return;
- mapped_buffer = kmap_atomic(sblock->pagev[0].page);
+ mapped_buffer = kmap_atomic(sblock->pagev[0]->page);
}
for (page_num = 0;;) {
@@ -1157,9 +1366,9 @@ static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info,
page_num++;
if (page_num >= sblock->page_count)
break;
- BUG_ON(!sblock->pagev[page_num].page);
+ WARN_ON(!sblock->pagev[page_num]->page);
- mapped_buffer = kmap_atomic(sblock->pagev[page_num].page);
+ mapped_buffer = kmap_atomic(sblock->pagev[page_num]->page);
}
btrfs_csum_final(crc, calculated_csum);
@@ -1197,17 +1406,23 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
struct scrub_block *sblock_good,
int page_num, int force_write)
{
- struct scrub_page *page_bad = sblock_bad->pagev + page_num;
- struct scrub_page *page_good = sblock_good->pagev + page_num;
+ struct scrub_page *page_bad = sblock_bad->pagev[page_num];
+ struct scrub_page *page_good = sblock_good->pagev[page_num];
- BUG_ON(sblock_bad->pagev[page_num].page == NULL);
- BUG_ON(sblock_good->pagev[page_num].page == NULL);
+ BUG_ON(page_bad->page == NULL);
+ BUG_ON(page_good->page == NULL);
if (force_write || sblock_bad->header_error ||
sblock_bad->checksum_error || page_bad->io_error) {
struct bio *bio;
int ret;
DECLARE_COMPLETION_ONSTACK(complete);
+ if (!page_bad->dev->bdev) {
+ printk_ratelimited(KERN_WARNING
+ "btrfs: scrub_repair_page_from_good_copy(bdev == NULL) is unexpected!\n");
+ return -EIO;
+ }
+
bio = bio_alloc(GFP_NOFS, 1);
if (!bio)
return -EIO;
@@ -1228,6 +1443,9 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
if (!bio_flagged(bio, BIO_UPTODATE)) {
btrfs_dev_stat_inc_and_print(page_bad->dev,
BTRFS_DEV_STAT_WRITE_ERRS);
+ btrfs_dev_replace_stats_inc(
+ &sblock_bad->sctx->dev_root->fs_info->
+ dev_replace.num_write_errors);
bio_put(bio);
return -EIO;
}
@@ -1237,13 +1455,174 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
return 0;
}
-static void scrub_checksum(struct scrub_block *sblock)
+static void scrub_write_block_to_dev_replace(struct scrub_block *sblock)
+{
+ int page_num;
+
+ for (page_num = 0; page_num < sblock->page_count; page_num++) {
+ int ret;
+
+ ret = scrub_write_page_to_dev_replace(sblock, page_num);
+ if (ret)
+ btrfs_dev_replace_stats_inc(
+ &sblock->sctx->dev_root->fs_info->dev_replace.
+ num_write_errors);
+ }
+}
+
+static int scrub_write_page_to_dev_replace(struct scrub_block *sblock,
+ int page_num)
+{
+ struct scrub_page *spage = sblock->pagev[page_num];
+
+ BUG_ON(spage->page == NULL);
+ if (spage->io_error) {
+ void *mapped_buffer = kmap_atomic(spage->page);
+
+ memset(mapped_buffer, 0, PAGE_CACHE_SIZE);
+ flush_dcache_page(spage->page);
+ kunmap_atomic(mapped_buffer);
+ }
+ return scrub_add_page_to_wr_bio(sblock->sctx, spage);
+}
+
+static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
+ struct scrub_page *spage)
+{
+ struct scrub_wr_ctx *wr_ctx = &sctx->wr_ctx;
+ struct scrub_bio *sbio;
+ int ret;
+
+ mutex_lock(&wr_ctx->wr_lock);
+again:
+ if (!wr_ctx->wr_curr_bio) {
+ wr_ctx->wr_curr_bio = kzalloc(sizeof(*wr_ctx->wr_curr_bio),
+ GFP_NOFS);
+ if (!wr_ctx->wr_curr_bio) {
+ mutex_unlock(&wr_ctx->wr_lock);
+ return -ENOMEM;
+ }
+ wr_ctx->wr_curr_bio->sctx = sctx;
+ wr_ctx->wr_curr_bio->page_count = 0;
+ }
+ sbio = wr_ctx->wr_curr_bio;
+ if (sbio->page_count == 0) {
+ struct bio *bio;
+
+ sbio->physical = spage->physical_for_dev_replace;
+ sbio->logical = spage->logical;
+ sbio->dev = wr_ctx->tgtdev;
+ bio = sbio->bio;
+ if (!bio) {
+ bio = bio_alloc(GFP_NOFS, wr_ctx->pages_per_wr_bio);
+ if (!bio) {
+ mutex_unlock(&wr_ctx->wr_lock);
+ return -ENOMEM;
+ }
+ sbio->bio = bio;
+ }
+
+ bio->bi_private = sbio;
+ bio->bi_end_io = scrub_wr_bio_end_io;
+ bio->bi_bdev = sbio->dev->bdev;
+ bio->bi_sector = sbio->physical >> 9;
+ sbio->err = 0;
+ } else if (sbio->physical + sbio->page_count * PAGE_SIZE !=
+ spage->physical_for_dev_replace ||
+ sbio->logical + sbio->page_count * PAGE_SIZE !=
+ spage->logical) {
+ scrub_wr_submit(sctx);
+ goto again;
+ }
+
+ ret = bio_add_page(sbio->bio, spage->page, PAGE_SIZE, 0);
+ if (ret != PAGE_SIZE) {
+ if (sbio->page_count < 1) {
+ bio_put(sbio->bio);
+ sbio->bio = NULL;
+ mutex_unlock(&wr_ctx->wr_lock);
+ return -EIO;
+ }
+ scrub_wr_submit(sctx);
+ goto again;
+ }
+
+ sbio->pagev[sbio->page_count] = spage;
+ scrub_page_get(spage);
+ sbio->page_count++;
+ if (sbio->page_count == wr_ctx->pages_per_wr_bio)
+ scrub_wr_submit(sctx);
+ mutex_unlock(&wr_ctx->wr_lock);
+
+ return 0;
+}
+
+static void scrub_wr_submit(struct scrub_ctx *sctx)
+{
+ struct scrub_wr_ctx *wr_ctx = &sctx->wr_ctx;
+ struct scrub_bio *sbio;
+
+ if (!wr_ctx->wr_curr_bio)
+ return;
+
+ sbio = wr_ctx->wr_curr_bio;
+ wr_ctx->wr_curr_bio = NULL;
+ WARN_ON(!sbio->bio->bi_bdev);
+ scrub_pending_bio_inc(sctx);
+ /* process all writes in a single worker thread. Then the block layer
+ * orders the requests before sending them to the driver which
+ * doubled the write performance on spinning disks when measured
+ * with Linux 3.5 */
+ btrfsic_submit_bio(WRITE, sbio->bio);
+}
+
+static void scrub_wr_bio_end_io(struct bio *bio, int err)
+{
+ struct scrub_bio *sbio = bio->bi_private;
+ struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;
+
+ sbio->err = err;
+ sbio->bio = bio;
+
+ sbio->work.func = scrub_wr_bio_end_io_worker;
+ btrfs_queue_worker(&fs_info->scrub_wr_completion_workers, &sbio->work);
+}
+
+static void scrub_wr_bio_end_io_worker(struct btrfs_work *work)
+{
+ struct scrub_bio *sbio = container_of(work, struct scrub_bio, work);
+ struct scrub_ctx *sctx = sbio->sctx;
+ int i;
+
+ WARN_ON(sbio->page_count > SCRUB_PAGES_PER_WR_BIO);
+ if (sbio->err) {
+ struct btrfs_dev_replace *dev_replace =
+ &sbio->sctx->dev_root->fs_info->dev_replace;
+
+ for (i = 0; i < sbio->page_count; i++) {
+ struct scrub_page *spage = sbio->pagev[i];
+
+ spage->io_error = 1;
+ btrfs_dev_replace_stats_inc(&dev_replace->
+ num_write_errors);
+ }
+ }
+
+ for (i = 0; i < sbio->page_count; i++)
+ scrub_page_put(sbio->pagev[i]);
+
+ bio_put(sbio->bio);
+ kfree(sbio);
+ scrub_pending_bio_dec(sctx);
+}
+
+static int scrub_checksum(struct scrub_block *sblock)
{
u64 flags;
int ret;
- BUG_ON(sblock->page_count < 1);
- flags = sblock->pagev[0].flags;
+ WARN_ON(sblock->page_count < 1);
+ flags = sblock->pagev[0]->flags;
ret = 0;
if (flags & BTRFS_EXTENT_FLAG_DATA)
ret = scrub_checksum_data(sblock);
@@ -1255,30 +1634,32 @@ static void scrub_checksum(struct scrub_block *sblock)
WARN_ON(1);
if (ret)
scrub_handle_errored_block(sblock);
+
+ return ret;
}
static int scrub_checksum_data(struct scrub_block *sblock)
{
- struct scrub_dev *sdev = sblock->sdev;
+ struct scrub_ctx *sctx = sblock->sctx;
u8 csum[BTRFS_CSUM_SIZE];
u8 *on_disk_csum;
struct page *page;
void *buffer;
u32 crc = ~(u32)0;
int fail = 0;
- struct btrfs_root *root = sdev->dev->dev_root;
+ struct btrfs_root *root = sctx->dev_root;
u64 len;
int index;
BUG_ON(sblock->page_count < 1);
- if (!sblock->pagev[0].have_csum)
+ if (!sblock->pagev[0]->have_csum)
return 0;
- on_disk_csum = sblock->pagev[0].csum;
- page = sblock->pagev[0].page;
+ on_disk_csum = sblock->pagev[0]->csum;
+ page = sblock->pagev[0]->page;
buffer = kmap_atomic(page);
- len = sdev->sectorsize;
+ len = sctx->sectorsize;
index = 0;
for (;;) {
u64 l = min_t(u64, len, PAGE_SIZE);
@@ -1290,13 +1671,13 @@ static int scrub_checksum_data(struct scrub_block *sblock)
break;
index++;
BUG_ON(index >= sblock->page_count);
- BUG_ON(!sblock->pagev[index].page);
- page = sblock->pagev[index].page;
+ BUG_ON(!sblock->pagev[index]->page);
+ page = sblock->pagev[index]->page;
buffer = kmap_atomic(page);
}
btrfs_csum_final(crc, csum);
- if (memcmp(csum, on_disk_csum, sdev->csum_size))
+ if (memcmp(csum, on_disk_csum, sctx->csum_size))
fail = 1;
return fail;
@@ -1304,9 +1685,9 @@ static int scrub_checksum_data(struct scrub_block *sblock)
static int scrub_checksum_tree_block(struct scrub_block *sblock)
{
- struct scrub_dev *sdev = sblock->sdev;
+ struct scrub_ctx *sctx = sblock->sctx;
struct btrfs_header *h;
- struct btrfs_root *root = sdev->dev->dev_root;
+ struct btrfs_root *root = sctx->dev_root;
struct btrfs_fs_info *fs_info = root->fs_info;
u8 calculated_csum[BTRFS_CSUM_SIZE];
u8 on_disk_csum[BTRFS_CSUM_SIZE];
@@ -1321,10 +1702,10 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
int index;
BUG_ON(sblock->page_count < 1);
- page = sblock->pagev[0].page;
+ page = sblock->pagev[0]->page;
mapped_buffer = kmap_atomic(page);
h = (struct btrfs_header *)mapped_buffer;
- memcpy(on_disk_csum, h->csum, sdev->csum_size);
+ memcpy(on_disk_csum, h->csum, sctx->csum_size);
/*
* we don't use the getter functions here, as we
@@ -1332,10 +1713,10 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
* b) the page is already kmapped
*/
- if (sblock->pagev[0].logical != le64_to_cpu(h->bytenr))
+ if (sblock->pagev[0]->logical != le64_to_cpu(h->bytenr))
++fail;
- if (sblock->pagev[0].generation != le64_to_cpu(h->generation))
+ if (sblock->pagev[0]->generation != le64_to_cpu(h->generation))
++fail;
if (memcmp(h->fsid, fs_info->fsid, BTRFS_UUID_SIZE))
@@ -1345,8 +1726,8 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
BTRFS_UUID_SIZE))
++fail;
- BUG_ON(sdev->nodesize != sdev->leafsize);
- len = sdev->nodesize - BTRFS_CSUM_SIZE;
+ WARN_ON(sctx->nodesize != sctx->leafsize);
+ len = sctx->nodesize - BTRFS_CSUM_SIZE;
mapped_size = PAGE_SIZE - BTRFS_CSUM_SIZE;
p = ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE;
index = 0;
@@ -1360,15 +1741,15 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
break;
index++;
BUG_ON(index >= sblock->page_count);
- BUG_ON(!sblock->pagev[index].page);
- page = sblock->pagev[index].page;
+ BUG_ON(!sblock->pagev[index]->page);
+ page = sblock->pagev[index]->page;
mapped_buffer = kmap_atomic(page);
mapped_size = PAGE_SIZE;
p = mapped_buffer;
}
btrfs_csum_final(crc, calculated_csum);
- if (memcmp(calculated_csum, on_disk_csum, sdev->csum_size))
+ if (memcmp(calculated_csum, on_disk_csum, sctx->csum_size))
++crc_fail;
return fail || crc_fail;
@@ -1377,8 +1758,8 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock)
static int scrub_checksum_super(struct scrub_block *sblock)
{
struct btrfs_super_block *s;
- struct scrub_dev *sdev = sblock->sdev;
- struct btrfs_root *root = sdev->dev->dev_root;
+ struct scrub_ctx *sctx = sblock->sctx;
+ struct btrfs_root *root = sctx->dev_root;
struct btrfs_fs_info *fs_info = root->fs_info;
u8 calculated_csum[BTRFS_CSUM_SIZE];
u8 on_disk_csum[BTRFS_CSUM_SIZE];
@@ -1393,15 +1774,15 @@ static int scrub_checksum_super(struct scrub_block *sblock)
int index;
BUG_ON(sblock->page_count < 1);
- page = sblock->pagev[0].page;
+ page = sblock->pagev[0]->page;
mapped_buffer = kmap_atomic(page);
s = (struct btrfs_super_block *)mapped_buffer;
- memcpy(on_disk_csum, s->csum, sdev->csum_size);
+ memcpy(on_disk_csum, s->csum, sctx->csum_size);
- if (sblock->pagev[0].logical != le64_to_cpu(s->bytenr))
+ if (sblock->pagev[0]->logical != le64_to_cpu(s->bytenr))
++fail_cor;
- if (sblock->pagev[0].generation != le64_to_cpu(s->generation))
+ if (sblock->pagev[0]->generation != le64_to_cpu(s->generation))
++fail_gen;
if (memcmp(s->fsid, fs_info->fsid, BTRFS_UUID_SIZE))
@@ -1421,15 +1802,15 @@ static int scrub_checksum_super(struct scrub_block *sblock)
break;
index++;
BUG_ON(index >= sblock->page_count);
- BUG_ON(!sblock->pagev[index].page);
- page = sblock->pagev[index].page;
+ BUG_ON(!sblock->pagev[index]->page);
+ page = sblock->pagev[index]->page;
mapped_buffer = kmap_atomic(page);
mapped_size = PAGE_SIZE;
p = mapped_buffer;
}
btrfs_csum_final(crc, calculated_csum);
- if (memcmp(calculated_csum, on_disk_csum, sdev->csum_size))
+ if (memcmp(calculated_csum, on_disk_csum, sctx->csum_size))
++fail_cor;
if (fail_cor + fail_gen) {
@@ -1438,14 +1819,14 @@ static int scrub_checksum_super(struct scrub_block *sblock)
* They will get written with the next transaction commit
* anyway
*/
- spin_lock(&sdev->stat_lock);
- ++sdev->stat.super_errors;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ ++sctx->stat.super_errors;
+ spin_unlock(&sctx->stat_lock);
if (fail_cor)
- btrfs_dev_stat_inc_and_print(sdev->dev,
+ btrfs_dev_stat_inc_and_print(sblock->pagev[0]->dev,
BTRFS_DEV_STAT_CORRUPTION_ERRS);
else
- btrfs_dev_stat_inc_and_print(sdev->dev,
+ btrfs_dev_stat_inc_and_print(sblock->pagev[0]->dev,
BTRFS_DEV_STAT_GENERATION_ERRS);
}
@@ -1463,28 +1844,54 @@ static void scrub_block_put(struct scrub_block *sblock)
int i;
for (i = 0; i < sblock->page_count; i++)
- if (sblock->pagev[i].page)
- __free_page(sblock->pagev[i].page);
+ scrub_page_put(sblock->pagev[i]);
kfree(sblock);
}
}
-static void scrub_submit(struct scrub_dev *sdev)
+static void scrub_page_get(struct scrub_page *spage)
+{
+ atomic_inc(&spage->ref_count);
+}
+
+static void scrub_page_put(struct scrub_page *spage)
+{
+ if (atomic_dec_and_test(&spage->ref_count)) {
+ if (spage->page)
+ __free_page(spage->page);
+ kfree(spage);
+ }
+}
+
+static void scrub_submit(struct scrub_ctx *sctx)
{
struct scrub_bio *sbio;
- if (sdev->curr == -1)
+ if (sctx->curr == -1)
return;
- sbio = sdev->bios[sdev->curr];
- sdev->curr = -1;
- atomic_inc(&sdev->in_flight);
+ sbio = sctx->bios[sctx->curr];
+ sctx->curr = -1;
+ scrub_pending_bio_inc(sctx);
- btrfsic_submit_bio(READ, sbio->bio);
+ if (!sbio->bio->bi_bdev) {
+ /*
+ * this case should not happen. If btrfs_map_block() is
+ * wrong, it could happen for dev-replace operations on
+ * missing devices when no mirrors are available, but in
+ * this case it should already fail the mount.
+ * This case is handled correctly (but _very_ slowly).
+ */
+ printk_ratelimited(KERN_WARNING
+ "btrfs: scrub_submit(bio bdev == NULL) is unexpected!\n");
+ bio_endio(sbio->bio, -EIO);
+ } else {
+ btrfsic_submit_bio(READ, sbio->bio);
+ }
}
-static int scrub_add_page_to_bio(struct scrub_dev *sdev,
- struct scrub_page *spage)
+static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx,
+ struct scrub_page *spage)
{
struct scrub_block *sblock = spage->sblock;
struct scrub_bio *sbio;
@@ -1494,28 +1901,29 @@ again:
/*
* grab a fresh bio or wait for one to become available
*/
- while (sdev->curr == -1) {
- spin_lock(&sdev->list_lock);
- sdev->curr = sdev->first_free;
- if (sdev->curr != -1) {
- sdev->first_free = sdev->bios[sdev->curr]->next_free;
- sdev->bios[sdev->curr]->next_free = -1;
- sdev->bios[sdev->curr]->page_count = 0;
- spin_unlock(&sdev->list_lock);
+ while (sctx->curr == -1) {
+ spin_lock(&sctx->list_lock);
+ sctx->curr = sctx->first_free;
+ if (sctx->curr != -1) {
+ sctx->first_free = sctx->bios[sctx->curr]->next_free;
+ sctx->bios[sctx->curr]->next_free = -1;
+ sctx->bios[sctx->curr]->page_count = 0;
+ spin_unlock(&sctx->list_lock);
} else {
- spin_unlock(&sdev->list_lock);
- wait_event(sdev->list_wait, sdev->first_free != -1);
+ spin_unlock(&sctx->list_lock);
+ wait_event(sctx->list_wait, sctx->first_free != -1);
}
}
- sbio = sdev->bios[sdev->curr];
+ sbio = sctx->bios[sctx->curr];
if (sbio->page_count == 0) {
struct bio *bio;
sbio->physical = spage->physical;
sbio->logical = spage->logical;
+ sbio->dev = spage->dev;
bio = sbio->bio;
if (!bio) {
- bio = bio_alloc(GFP_NOFS, sdev->pages_per_bio);
+ bio = bio_alloc(GFP_NOFS, sctx->pages_per_rd_bio);
if (!bio)
return -ENOMEM;
sbio->bio = bio;
@@ -1523,14 +1931,15 @@ again:
bio->bi_private = sbio;
bio->bi_end_io = scrub_bio_end_io;
- bio->bi_bdev = sdev->dev->bdev;
- bio->bi_sector = spage->physical >> 9;
+ bio->bi_bdev = sbio->dev->bdev;
+ bio->bi_sector = sbio->physical >> 9;
sbio->err = 0;
} else if (sbio->physical + sbio->page_count * PAGE_SIZE !=
spage->physical ||
sbio->logical + sbio->page_count * PAGE_SIZE !=
- spage->logical) {
- scrub_submit(sdev);
+ spage->logical ||
+ sbio->dev != spage->dev) {
+ scrub_submit(sctx);
goto again;
}
@@ -1542,81 +1951,87 @@ again:
sbio->bio = NULL;
return -EIO;
}
- scrub_submit(sdev);
+ scrub_submit(sctx);
goto again;
}
- scrub_block_get(sblock); /* one for the added page */
+ scrub_block_get(sblock); /* one for the page added to the bio */
atomic_inc(&sblock->outstanding_pages);
sbio->page_count++;
- if (sbio->page_count == sdev->pages_per_bio)
- scrub_submit(sdev);
+ if (sbio->page_count == sctx->pages_per_rd_bio)
+ scrub_submit(sctx);
return 0;
}
-static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len,
- u64 physical, u64 flags, u64 gen, int mirror_num,
- u8 *csum, int force)
+static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
+ u64 physical, struct btrfs_device *dev, u64 flags,
+ u64 gen, int mirror_num, u8 *csum, int force,
+ u64 physical_for_dev_replace)
{
struct scrub_block *sblock;
int index;
sblock = kzalloc(sizeof(*sblock), GFP_NOFS);
if (!sblock) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.malloc_errors++;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
return -ENOMEM;
}
- /* one ref inside this function, plus one for each page later on */
+ /* one ref inside this function, plus one for each page added to
+ * a bio later on */
atomic_set(&sblock->ref_count, 1);
- sblock->sdev = sdev;
+ sblock->sctx = sctx;
sblock->no_io_error_seen = 1;
for (index = 0; len > 0; index++) {
- struct scrub_page *spage = sblock->pagev + index;
+ struct scrub_page *spage;
u64 l = min_t(u64, len, PAGE_SIZE);
- BUG_ON(index >= SCRUB_MAX_PAGES_PER_BLOCK);
- spage->page = alloc_page(GFP_NOFS);
- if (!spage->page) {
- spin_lock(&sdev->stat_lock);
- sdev->stat.malloc_errors++;
- spin_unlock(&sdev->stat_lock);
- while (index > 0) {
- index--;
- __free_page(sblock->pagev[index].page);
- }
- kfree(sblock);
+ spage = kzalloc(sizeof(*spage), GFP_NOFS);
+ if (!spage) {
+leave_nomem:
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
+ scrub_block_put(sblock);
return -ENOMEM;
}
+ BUG_ON(index >= SCRUB_MAX_PAGES_PER_BLOCK);
+ scrub_page_get(spage);
+ sblock->pagev[index] = spage;
spage->sblock = sblock;
- spage->dev = sdev->dev;
+ spage->dev = dev;
spage->flags = flags;
spage->generation = gen;
spage->logical = logical;
spage->physical = physical;
+ spage->physical_for_dev_replace = physical_for_dev_replace;
spage->mirror_num = mirror_num;
if (csum) {
spage->have_csum = 1;
- memcpy(spage->csum, csum, sdev->csum_size);
+ memcpy(spage->csum, csum, sctx->csum_size);
} else {
spage->have_csum = 0;
}
sblock->page_count++;
+ spage->page = alloc_page(GFP_NOFS);
+ if (!spage->page)
+ goto leave_nomem;
len -= l;
logical += l;
physical += l;
+ physical_for_dev_replace += l;
}
- BUG_ON(sblock->page_count == 0);
+ WARN_ON(sblock->page_count == 0);
for (index = 0; index < sblock->page_count; index++) {
- struct scrub_page *spage = sblock->pagev + index;
+ struct scrub_page *spage = sblock->pagev[index];
int ret;
- ret = scrub_add_page_to_bio(sdev, spage);
+ ret = scrub_add_page_to_rd_bio(sctx, spage);
if (ret) {
scrub_block_put(sblock);
return ret;
@@ -1624,7 +2039,7 @@ static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len,
}
if (force)
- scrub_submit(sdev);
+ scrub_submit(sctx);
/* last one frees, either here or in bio completion for last page */
scrub_block_put(sblock);
@@ -1634,8 +2049,7 @@ static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len,
static void scrub_bio_end_io(struct bio *bio, int err)
{
struct scrub_bio *sbio = bio->bi_private;
- struct scrub_dev *sdev = sbio->sdev;
- struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info;
+ struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info;
sbio->err = err;
sbio->bio = bio;
@@ -1646,10 +2060,10 @@ static void scrub_bio_end_io(struct bio *bio, int err)
static void scrub_bio_end_io_worker(struct btrfs_work *work)
{
struct scrub_bio *sbio = container_of(work, struct scrub_bio, work);
- struct scrub_dev *sdev = sbio->sdev;
+ struct scrub_ctx *sctx = sbio->sctx;
int i;
- BUG_ON(sbio->page_count > SCRUB_PAGES_PER_BIO);
+ BUG_ON(sbio->page_count > SCRUB_PAGES_PER_RD_BIO);
if (sbio->err) {
for (i = 0; i < sbio->page_count; i++) {
struct scrub_page *spage = sbio->pagev[i];
@@ -1671,23 +2085,37 @@ static void scrub_bio_end_io_worker(struct btrfs_work *work)
bio_put(sbio->bio);
sbio->bio = NULL;
- spin_lock(&sdev->list_lock);
- sbio->next_free = sdev->first_free;
- sdev->first_free = sbio->index;
- spin_unlock(&sdev->list_lock);
- atomic_dec(&sdev->in_flight);
- wake_up(&sdev->list_wait);
+ spin_lock(&sctx->list_lock);
+ sbio->next_free = sctx->first_free;
+ sctx->first_free = sbio->index;
+ spin_unlock(&sctx->list_lock);
+
+ if (sctx->is_dev_replace &&
+ atomic_read(&sctx->wr_ctx.flush_all_writes)) {
+ mutex_lock(&sctx->wr_ctx.wr_lock);
+ scrub_wr_submit(sctx);
+ mutex_unlock(&sctx->wr_ctx.wr_lock);
+ }
+
+ scrub_pending_bio_dec(sctx);
}
static void scrub_block_complete(struct scrub_block *sblock)
{
- if (!sblock->no_io_error_seen)
+ if (!sblock->no_io_error_seen) {
scrub_handle_errored_block(sblock);
- else
- scrub_checksum(sblock);
+ } else {
+ /*
+ * if has checksum error, write via repair mechanism in
+ * dev replace case, otherwise write here in dev replace
+ * case.
+ */
+ if (!scrub_checksum(sblock) && sblock->sctx->is_dev_replace)
+ scrub_write_block_to_dev_replace(sblock);
+ }
}
-static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len,
+static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u64 len,
u8 *csum)
{
struct btrfs_ordered_sum *sum = NULL;
@@ -1695,15 +2123,15 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len,
unsigned long i;
unsigned long num_sectors;
- while (!list_empty(&sdev->csum_list)) {
- sum = list_first_entry(&sdev->csum_list,
+ while (!list_empty(&sctx->csum_list)) {
+ sum = list_first_entry(&sctx->csum_list,
struct btrfs_ordered_sum, list);
if (sum->bytenr > logical)
return 0;
if (sum->bytenr + sum->len > logical)
break;
- ++sdev->stat.csum_discards;
+ ++sctx->stat.csum_discards;
list_del(&sum->list);
kfree(sum);
sum = NULL;
@@ -1711,10 +2139,10 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len,
if (!sum)
return 0;
- num_sectors = sum->len / sdev->sectorsize;
+ num_sectors = sum->len / sctx->sectorsize;
for (i = 0; i < num_sectors; ++i) {
if (sum->sums[i].bytenr == logical) {
- memcpy(csum, &sum->sums[i].sum, sdev->csum_size);
+ memcpy(csum, &sum->sums[i].sum, sctx->csum_size);
ret = 1;
break;
}
@@ -1727,29 +2155,30 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len,
}
/* scrub extent tries to collect up to 64 kB for each bio */
-static int scrub_extent(struct scrub_dev *sdev, u64 logical, u64 len,
- u64 physical, u64 flags, u64 gen, int mirror_num)
+static int scrub_extent(struct scrub_ctx *sctx, u64 logical, u64 len,
+ u64 physical, struct btrfs_device *dev, u64 flags,
+ u64 gen, int mirror_num, u64 physical_for_dev_replace)
{
int ret;
u8 csum[BTRFS_CSUM_SIZE];
u32 blocksize;
if (flags & BTRFS_EXTENT_FLAG_DATA) {
- blocksize = sdev->sectorsize;
- spin_lock(&sdev->stat_lock);
- sdev->stat.data_extents_scrubbed++;
- sdev->stat.data_bytes_scrubbed += len;
- spin_unlock(&sdev->stat_lock);
+ blocksize = sctx->sectorsize;
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.data_extents_scrubbed++;
+ sctx->stat.data_bytes_scrubbed += len;
+ spin_unlock(&sctx->stat_lock);
} else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
- BUG_ON(sdev->nodesize != sdev->leafsize);
- blocksize = sdev->nodesize;
- spin_lock(&sdev->stat_lock);
- sdev->stat.tree_extents_scrubbed++;
- sdev->stat.tree_bytes_scrubbed += len;
- spin_unlock(&sdev->stat_lock);
+ WARN_ON(sctx->nodesize != sctx->leafsize);
+ blocksize = sctx->nodesize;
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.tree_extents_scrubbed++;
+ sctx->stat.tree_bytes_scrubbed += len;
+ spin_unlock(&sctx->stat_lock);
} else {
- blocksize = sdev->sectorsize;
- BUG_ON(1);
+ blocksize = sctx->sectorsize;
+ WARN_ON(1);
}
while (len) {
@@ -1758,26 +2187,38 @@ static int scrub_extent(struct scrub_dev *sdev, u64 logical, u64 len,
if (flags & BTRFS_EXTENT_FLAG_DATA) {
/* push csums to sbio */
- have_csum = scrub_find_csum(sdev, logical, l, csum);
+ have_csum = scrub_find_csum(sctx, logical, l, csum);
if (have_csum == 0)
- ++sdev->stat.no_csum;
+ ++sctx->stat.no_csum;
+ if (sctx->is_dev_replace && !have_csum) {
+ ret = copy_nocow_pages(sctx, logical, l,
+ mirror_num,
+ physical_for_dev_replace);
+ goto behind_scrub_pages;
+ }
}
- ret = scrub_pages(sdev, logical, l, physical, flags, gen,
- mirror_num, have_csum ? csum : NULL, 0);
+ ret = scrub_pages(sctx, logical, l, physical, dev, flags, gen,
+ mirror_num, have_csum ? csum : NULL, 0,
+ physical_for_dev_replace);
+behind_scrub_pages:
if (ret)
return ret;
len -= l;
logical += l;
physical += l;
+ physical_for_dev_replace += l;
}
return 0;
}
-static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
- struct map_lookup *map, int num, u64 base, u64 length)
+static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
+ struct map_lookup *map,
+ struct btrfs_device *scrub_dev,
+ int num, u64 base, u64 length,
+ int is_dev_replace)
{
struct btrfs_path *path;
- struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info;
+ struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
struct btrfs_root *root = fs_info->extent_root;
struct btrfs_root *csum_root = fs_info->csum_root;
struct btrfs_extent_item *extent;
@@ -1797,9 +2238,13 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
struct reada_control *reada2;
struct btrfs_key key_start;
struct btrfs_key key_end;
-
u64 increment = map->stripe_len;
u64 offset;
+ u64 extent_logical;
+ u64 extent_physical;
+ u64 extent_len;
+ struct btrfs_device *extent_dev;
+ int extent_mirror_num;
nstripes = length;
offset = 0;
@@ -1843,8 +2288,8 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
*/
logical = base + offset;
- wait_event(sdev->list_wait,
- atomic_read(&sdev->in_flight) == 0);
+ wait_event(sctx->list_wait,
+ atomic_read(&sctx->bios_in_flight) == 0);
atomic_inc(&fs_info->scrubs_paused);
wake_up(&fs_info->scrub_pause_wait);
@@ -1898,7 +2343,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
* canceled?
*/
if (atomic_read(&fs_info->scrub_cancel_req) ||
- atomic_read(&sdev->cancel_req)) {
+ atomic_read(&sctx->cancel_req)) {
ret = -ECANCELED;
goto out;
}
@@ -1907,9 +2352,14 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
*/
if (atomic_read(&fs_info->scrub_pause_req)) {
/* push queued extents */
- scrub_submit(sdev);
- wait_event(sdev->list_wait,
- atomic_read(&sdev->in_flight) == 0);
+ atomic_set(&sctx->wr_ctx.flush_all_writes, 1);
+ scrub_submit(sctx);
+ mutex_lock(&sctx->wr_ctx.wr_lock);
+ scrub_wr_submit(sctx);
+ mutex_unlock(&sctx->wr_ctx.wr_lock);
+ wait_event(sctx->list_wait,
+ atomic_read(&sctx->bios_in_flight) == 0);
+ atomic_set(&sctx->wr_ctx.flush_all_writes, 0);
atomic_inc(&fs_info->scrubs_paused);
wake_up(&fs_info->scrub_pause_wait);
mutex_lock(&fs_info->scrub_lock);
@@ -1926,7 +2376,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
ret = btrfs_lookup_csums_range(csum_root, logical,
logical + map->stripe_len - 1,
- &sdev->csum_list, 1);
+ &sctx->csum_list, 1);
if (ret)
goto out;
@@ -2004,9 +2454,20 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev,
key.objectid;
}
- ret = scrub_extent(sdev, key.objectid, key.offset,
- key.objectid - logical + physical,
- flags, generation, mirror_num);
+ extent_logical = key.objectid;
+ extent_physical = key.objectid - logical + physical;
+ extent_len = key.offset;
+ extent_dev = scrub_dev;
+ extent_mirror_num = mirror_num;
+ if (is_dev_replace)
+ scrub_remap_extent(fs_info, extent_logical,
+ extent_len, &extent_physical,
+ &extent_dev,
+ &extent_mirror_num);
+ ret = scrub_extent(sctx, extent_logical, extent_len,
+ extent_physical, extent_dev, flags,
+ generation, extent_mirror_num,
+ key.objectid - logical + physical);
if (ret)
goto out;
@@ -2016,29 +2477,34 @@ next:
btrfs_release_path(path);
logical += increment;
physical += map->stripe_len;
- spin_lock(&sdev->stat_lock);
- sdev->stat.last_physical = physical;
- spin_unlock(&sdev->stat_lock);
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.last_physical = physical;
+ spin_unlock(&sctx->stat_lock);
}
+out:
/* push queued extents */
- scrub_submit(sdev);
+ scrub_submit(sctx);
+ mutex_lock(&sctx->wr_ctx.wr_lock);
+ scrub_wr_submit(sctx);
+ mutex_unlock(&sctx->wr_ctx.wr_lock);
-out:
blk_finish_plug(&plug);
btrfs_free_path(path);
return ret < 0 ? ret : 0;
}
-static noinline_for_stack int scrub_chunk(struct scrub_dev *sdev,
- u64 chunk_tree, u64 chunk_objectid, u64 chunk_offset, u64 length,
- u64 dev_offset)
+static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx,
+ struct btrfs_device *scrub_dev,
+ u64 chunk_tree, u64 chunk_objectid,
+ u64 chunk_offset, u64 length,
+ u64 dev_offset, int is_dev_replace)
{
struct btrfs_mapping_tree *map_tree =
- &sdev->dev->dev_root->fs_info->mapping_tree;
+ &sctx->dev_root->fs_info->mapping_tree;
struct map_lookup *map;
struct extent_map *em;
int i;
- int ret = -EINVAL;
+ int ret = 0;
read_lock(&map_tree->map_tree.lock);
em = lookup_extent_mapping(&map_tree->map_tree, chunk_offset, 1);
@@ -2055,9 +2521,11 @@ static noinline_for_stack int scrub_chunk(struct scrub_dev *sdev,
goto out;
for (i = 0; i < map->num_stripes; ++i) {
- if (map->stripes[i].dev == sdev->dev &&
+ if (map->stripes[i].dev->bdev == scrub_dev->bdev &&
map->stripes[i].physical == dev_offset) {
- ret = scrub_stripe(sdev, map, i, chunk_offset, length);
+ ret = scrub_stripe(sctx, map, scrub_dev, i,
+ chunk_offset, length,
+ is_dev_replace);
if (ret)
goto out;
}
@@ -2069,11 +2537,13 @@ out:
}
static noinline_for_stack
-int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end)
+int scrub_enumerate_chunks(struct scrub_ctx *sctx,
+ struct btrfs_device *scrub_dev, u64 start, u64 end,
+ int is_dev_replace)
{
struct btrfs_dev_extent *dev_extent = NULL;
struct btrfs_path *path;
- struct btrfs_root *root = sdev->dev->dev_root;
+ struct btrfs_root *root = sctx->dev_root;
struct btrfs_fs_info *fs_info = root->fs_info;
u64 length;
u64 chunk_tree;
@@ -2085,6 +2555,7 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end)
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_block_group_cache *cache;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
path = btrfs_alloc_path();
if (!path)
@@ -2094,11 +2565,10 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end)
path->search_commit_root = 1;
path->skip_locking = 1;
- key.objectid = sdev->dev->devid;
+ key.objectid = scrub_dev->devid;
key.offset = 0ull;
key.type = BTRFS_DEV_EXTENT_KEY;
-
while (1) {
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
@@ -2117,7 +2587,7 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end)
btrfs_item_key_to_cpu(l, &found_key, slot);
- if (found_key.objectid != sdev->dev->devid)
+ if (found_key.objectid != scrub_dev->devid)
break;
if (btrfs_key_type(&found_key) != BTRFS_DEV_EXTENT_KEY)
@@ -2151,11 +2621,62 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end)
ret = -ENOENT;
break;
}
- ret = scrub_chunk(sdev, chunk_tree, chunk_objectid,
- chunk_offset, length, found_key.offset);
+ dev_replace->cursor_right = found_key.offset + length;
+ dev_replace->cursor_left = found_key.offset;
+ dev_replace->item_needs_writeback = 1;
+ ret = scrub_chunk(sctx, scrub_dev, chunk_tree, chunk_objectid,
+ chunk_offset, length, found_key.offset,
+ is_dev_replace);
+
+ /*
+ * flush, submit all pending read and write bios, afterwards
+ * wait for them.
+ * Note that in the dev replace case, a read request causes
+ * write requests that are submitted in the read completion
+ * worker. Therefore in the current situation, it is required
+ * that all write requests are flushed, so that all read and
+ * write requests are really completed when bios_in_flight
+ * changes to 0.
+ */
+ atomic_set(&sctx->wr_ctx.flush_all_writes, 1);
+ scrub_submit(sctx);
+ mutex_lock(&sctx->wr_ctx.wr_lock);
+ scrub_wr_submit(sctx);
+ mutex_unlock(&sctx->wr_ctx.wr_lock);
+
+ wait_event(sctx->list_wait,
+ atomic_read(&sctx->bios_in_flight) == 0);
+ atomic_set(&sctx->wr_ctx.flush_all_writes, 0);
+ atomic_inc(&fs_info->scrubs_paused);
+ wake_up(&fs_info->scrub_pause_wait);
+ wait_event(sctx->list_wait,
+ atomic_read(&sctx->workers_pending) == 0);
+
+ mutex_lock(&fs_info->scrub_lock);
+ while (atomic_read(&fs_info->scrub_pause_req)) {
+ mutex_unlock(&fs_info->scrub_lock);
+ wait_event(fs_info->scrub_pause_wait,
+ atomic_read(&fs_info->scrub_pause_req) == 0);
+ mutex_lock(&fs_info->scrub_lock);
+ }
+ atomic_dec(&fs_info->scrubs_paused);
+ mutex_unlock(&fs_info->scrub_lock);
+ wake_up(&fs_info->scrub_pause_wait);
+
+ dev_replace->cursor_left = dev_replace->cursor_right;
+ dev_replace->item_needs_writeback = 1;
btrfs_put_block_group(cache);
if (ret)
break;
+ if (is_dev_replace &&
+ atomic64_read(&dev_replace->num_write_errors) > 0) {
+ ret = -EIO;
+ break;
+ }
+ if (sctx->stat.malloc_errors > 0) {
+ ret = -ENOMEM;
+ break;
+ }
key.offset = found_key.offset + length;
btrfs_release_path(path);
@@ -2170,14 +2691,14 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end)
return ret < 0 ? ret : 0;
}
-static noinline_for_stack int scrub_supers(struct scrub_dev *sdev)
+static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx,
+ struct btrfs_device *scrub_dev)
{
int i;
u64 bytenr;
u64 gen;
int ret;
- struct btrfs_device *device = sdev->dev;
- struct btrfs_root *root = device->dev_root;
+ struct btrfs_root *root = sctx->dev_root;
if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
return -EIO;
@@ -2186,15 +2707,16 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev)
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
bytenr = btrfs_sb_offset(i);
- if (bytenr + BTRFS_SUPER_INFO_SIZE > device->total_bytes)
+ if (bytenr + BTRFS_SUPER_INFO_SIZE > scrub_dev->total_bytes)
break;
- ret = scrub_pages(sdev, bytenr, BTRFS_SUPER_INFO_SIZE, bytenr,
- BTRFS_EXTENT_FLAG_SUPER, gen, i, NULL, 1);
+ ret = scrub_pages(sctx, bytenr, BTRFS_SUPER_INFO_SIZE, bytenr,
+ scrub_dev, BTRFS_EXTENT_FLAG_SUPER, gen, i,
+ NULL, 1, bytenr);
if (ret)
return ret;
}
- wait_event(sdev->list_wait, atomic_read(&sdev->in_flight) == 0);
+ wait_event(sctx->list_wait, atomic_read(&sctx->bios_in_flight) == 0);
return 0;
}
@@ -2202,19 +2724,38 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev)
/*
* get a reference count on fs_info->scrub_workers. start worker if necessary
*/
-static noinline_for_stack int scrub_workers_get(struct btrfs_root *root)
+static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
+ int is_dev_replace)
{
- struct btrfs_fs_info *fs_info = root->fs_info;
int ret = 0;
mutex_lock(&fs_info->scrub_lock);
if (fs_info->scrub_workers_refcnt == 0) {
- btrfs_init_workers(&fs_info->scrub_workers, "scrub",
- fs_info->thread_pool_size, &fs_info->generic_worker);
+ if (is_dev_replace)
+ btrfs_init_workers(&fs_info->scrub_workers, "scrub", 1,
+ &fs_info->generic_worker);
+ else
+ btrfs_init_workers(&fs_info->scrub_workers, "scrub",
+ fs_info->thread_pool_size,
+ &fs_info->generic_worker);
fs_info->scrub_workers.idle_thresh = 4;
ret = btrfs_start_workers(&fs_info->scrub_workers);
if (ret)
goto out;
+ btrfs_init_workers(&fs_info->scrub_wr_completion_workers,
+ "scrubwrc",
+ fs_info->thread_pool_size,
+ &fs_info->generic_worker);
+ fs_info->scrub_wr_completion_workers.idle_thresh = 2;
+ ret = btrfs_start_workers(
+ &fs_info->scrub_wr_completion_workers);
+ if (ret)
+ goto out;
+ btrfs_init_workers(&fs_info->scrub_nocow_workers, "scrubnc", 1,
+ &fs_info->generic_worker);
+ ret = btrfs_start_workers(&fs_info->scrub_nocow_workers);
+ if (ret)
+ goto out;
}
++fs_info->scrub_workers_refcnt;
out:
@@ -2223,40 +2764,41 @@ out:
return ret;
}
-static noinline_for_stack void scrub_workers_put(struct btrfs_root *root)
+static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info)
{
- struct btrfs_fs_info *fs_info = root->fs_info;
-
mutex_lock(&fs_info->scrub_lock);
- if (--fs_info->scrub_workers_refcnt == 0)
+ if (--fs_info->scrub_workers_refcnt == 0) {
btrfs_stop_workers(&fs_info->scrub_workers);
+ btrfs_stop_workers(&fs_info->scrub_wr_completion_workers);
+ btrfs_stop_workers(&fs_info->scrub_nocow_workers);
+ }
WARN_ON(fs_info->scrub_workers_refcnt < 0);
mutex_unlock(&fs_info->scrub_lock);
}
-
-int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
- struct btrfs_scrub_progress *progress, int readonly)
+int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
+ u64 end, struct btrfs_scrub_progress *progress,
+ int readonly, int is_dev_replace)
{
- struct scrub_dev *sdev;
- struct btrfs_fs_info *fs_info = root->fs_info;
+ struct scrub_ctx *sctx;
int ret;
struct btrfs_device *dev;
- if (btrfs_fs_closing(root->fs_info))
+ if (btrfs_fs_closing(fs_info))
return -EINVAL;
/*
* check some assumptions
*/
- if (root->nodesize != root->leafsize) {
+ if (fs_info->chunk_root->nodesize != fs_info->chunk_root->leafsize) {
printk(KERN_ERR
"btrfs_scrub: size assumption nodesize == leafsize (%d == %d) fails\n",
- root->nodesize, root->leafsize);
+ fs_info->chunk_root->nodesize,
+ fs_info->chunk_root->leafsize);
return -EINVAL;
}
- if (root->nodesize > BTRFS_STRIPE_LEN) {
+ if (fs_info->chunk_root->nodesize > BTRFS_STRIPE_LEN) {
/*
* in this case scrub is unable to calculate the checksum
* the way scrub is implemented. Do not handle this
@@ -2264,80 +2806,105 @@ int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
*/
printk(KERN_ERR
"btrfs_scrub: size assumption nodesize <= BTRFS_STRIPE_LEN (%d <= %d) fails\n",
- root->nodesize, BTRFS_STRIPE_LEN);
+ fs_info->chunk_root->nodesize, BTRFS_STRIPE_LEN);
return -EINVAL;
}
- if (root->sectorsize != PAGE_SIZE) {
+ if (fs_info->chunk_root->sectorsize != PAGE_SIZE) {
/* not supported for data w/o checksums */
printk(KERN_ERR
"btrfs_scrub: size assumption sectorsize != PAGE_SIZE (%d != %lld) fails\n",
- root->sectorsize, (unsigned long long)PAGE_SIZE);
+ fs_info->chunk_root->sectorsize,
+ (unsigned long long)PAGE_SIZE);
return -EINVAL;
}
- ret = scrub_workers_get(root);
+ if (fs_info->chunk_root->nodesize >
+ PAGE_SIZE * SCRUB_MAX_PAGES_PER_BLOCK ||
+ fs_info->chunk_root->sectorsize >
+ PAGE_SIZE * SCRUB_MAX_PAGES_PER_BLOCK) {
+ /*
+ * would exhaust the array bounds of pagev member in
+ * struct scrub_block
+ */
+ pr_err("btrfs_scrub: size assumption nodesize and sectorsize <= SCRUB_MAX_PAGES_PER_BLOCK (%d <= %d && %d <= %d) fails\n",
+ fs_info->chunk_root->nodesize,
+ SCRUB_MAX_PAGES_PER_BLOCK,
+ fs_info->chunk_root->sectorsize,
+ SCRUB_MAX_PAGES_PER_BLOCK);
+ return -EINVAL;
+ }
+
+ ret = scrub_workers_get(fs_info, is_dev_replace);
if (ret)
return ret;
- mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
- dev = btrfs_find_device(root, devid, NULL, NULL);
- if (!dev || dev->missing) {
- mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
- scrub_workers_put(root);
+ mutex_lock(&fs_info->fs_devices->device_list_mutex);
+ dev = btrfs_find_device(fs_info, devid, NULL, NULL);
+ if (!dev || (dev->missing && !is_dev_replace)) {
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ scrub_workers_put(fs_info);
return -ENODEV;
}
mutex_lock(&fs_info->scrub_lock);
- if (!dev->in_fs_metadata) {
+ if (!dev->in_fs_metadata || dev->is_tgtdev_for_dev_replace) {
mutex_unlock(&fs_info->scrub_lock);
- mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
- scrub_workers_put(root);
- return -ENODEV;
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ scrub_workers_put(fs_info);
+ return -EIO;
}
- if (dev->scrub_device) {
+ btrfs_dev_replace_lock(&fs_info->dev_replace);
+ if (dev->scrub_device ||
+ (!is_dev_replace &&
+ btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))) {
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
mutex_unlock(&fs_info->scrub_lock);
- mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
- scrub_workers_put(root);
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ scrub_workers_put(fs_info);
return -EINPROGRESS;
}
- sdev = scrub_setup_dev(dev);
- if (IS_ERR(sdev)) {
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
+ sctx = scrub_setup_ctx(dev, is_dev_replace);
+ if (IS_ERR(sctx)) {
mutex_unlock(&fs_info->scrub_lock);
- mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
- scrub_workers_put(root);
- return PTR_ERR(sdev);
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ scrub_workers_put(fs_info);
+ return PTR_ERR(sctx);
}
- sdev->readonly = readonly;
- dev->scrub_device = sdev;
+ sctx->readonly = readonly;
+ dev->scrub_device = sctx;
atomic_inc(&fs_info->scrubs_running);
mutex_unlock(&fs_info->scrub_lock);
- mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
- down_read(&fs_info->scrub_super_lock);
- ret = scrub_supers(sdev);
- up_read(&fs_info->scrub_super_lock);
+ if (!is_dev_replace) {
+ down_read(&fs_info->scrub_super_lock);
+ ret = scrub_supers(sctx, dev);
+ up_read(&fs_info->scrub_super_lock);
+ }
if (!ret)
- ret = scrub_enumerate_chunks(sdev, start, end);
+ ret = scrub_enumerate_chunks(sctx, dev, start, end,
+ is_dev_replace);
- wait_event(sdev->list_wait, atomic_read(&sdev->in_flight) == 0);
+ wait_event(sctx->list_wait, atomic_read(&sctx->bios_in_flight) == 0);
atomic_dec(&fs_info->scrubs_running);
wake_up(&fs_info->scrub_pause_wait);
- wait_event(sdev->list_wait, atomic_read(&sdev->fixup_cnt) == 0);
+ wait_event(sctx->list_wait, atomic_read(&sctx->workers_pending) == 0);
if (progress)
- memcpy(progress, &sdev->stat, sizeof(*progress));
+ memcpy(progress, &sctx->stat, sizeof(*progress));
mutex_lock(&fs_info->scrub_lock);
dev->scrub_device = NULL;
mutex_unlock(&fs_info->scrub_lock);
- scrub_free_dev(sdev);
- scrub_workers_put(root);
+ scrub_free_ctx(sctx);
+ scrub_workers_put(fs_info);
return ret;
}
@@ -2377,9 +2944,8 @@ void btrfs_scrub_continue_super(struct btrfs_root *root)
up_write(&root->fs_info->scrub_super_lock);
}
-int __btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)
+int btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)
{
-
mutex_lock(&fs_info->scrub_lock);
if (!atomic_read(&fs_info->scrubs_running)) {
mutex_unlock(&fs_info->scrub_lock);
@@ -2399,23 +2965,18 @@ int __btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)
return 0;
}
-int btrfs_scrub_cancel(struct btrfs_root *root)
+int btrfs_scrub_cancel_dev(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *dev)
{
- return __btrfs_scrub_cancel(root->fs_info);
-}
-
-int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev)
-{
- struct btrfs_fs_info *fs_info = root->fs_info;
- struct scrub_dev *sdev;
+ struct scrub_ctx *sctx;
mutex_lock(&fs_info->scrub_lock);
- sdev = dev->scrub_device;
- if (!sdev) {
+ sctx = dev->scrub_device;
+ if (!sctx) {
mutex_unlock(&fs_info->scrub_lock);
return -ENOTCONN;
}
- atomic_inc(&sdev->cancel_req);
+ atomic_inc(&sctx->cancel_req);
while (dev->scrub_device) {
mutex_unlock(&fs_info->scrub_lock);
wait_event(fs_info->scrub_pause_wait,
@@ -2438,12 +2999,12 @@ int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid)
* does not go away in cancel_dev. FIXME: find a better solution
*/
mutex_lock(&fs_info->fs_devices->device_list_mutex);
- dev = btrfs_find_device(root, devid, NULL, NULL);
+ dev = btrfs_find_device(fs_info, devid, NULL, NULL);
if (!dev) {
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
return -ENODEV;
}
- ret = btrfs_scrub_cancel_dev(root, dev);
+ ret = btrfs_scrub_cancel_dev(fs_info, dev);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
return ret;
@@ -2453,15 +3014,284 @@ int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
struct btrfs_scrub_progress *progress)
{
struct btrfs_device *dev;
- struct scrub_dev *sdev = NULL;
+ struct scrub_ctx *sctx = NULL;
mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
- dev = btrfs_find_device(root, devid, NULL, NULL);
+ dev = btrfs_find_device(root->fs_info, devid, NULL, NULL);
if (dev)
- sdev = dev->scrub_device;
- if (sdev)
- memcpy(progress, &sdev->stat, sizeof(*progress));
+ sctx = dev->scrub_device;
+ if (sctx)
+ memcpy(progress, &sctx->stat, sizeof(*progress));
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
- return dev ? (sdev ? 0 : -ENOTCONN) : -ENODEV;
+ return dev ? (sctx ? 0 : -ENOTCONN) : -ENODEV;
+}
+
+static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
+ u64 extent_logical, u64 extent_len,
+ u64 *extent_physical,
+ struct btrfs_device **extent_dev,
+ int *extent_mirror_num)
+{
+ u64 mapped_length;
+ struct btrfs_bio *bbio = NULL;
+ int ret;
+
+ mapped_length = extent_len;
+ ret = btrfs_map_block(fs_info, READ, extent_logical,
+ &mapped_length, &bbio, 0);
+ if (ret || !bbio || mapped_length < extent_len ||
+ !bbio->stripes[0].dev->bdev) {
+ kfree(bbio);
+ return;
+ }
+
+ *extent_physical = bbio->stripes[0].physical;
+ *extent_mirror_num = bbio->mirror_num;
+ *extent_dev = bbio->stripes[0].dev;
+ kfree(bbio);
+}
+
+static int scrub_setup_wr_ctx(struct scrub_ctx *sctx,
+ struct scrub_wr_ctx *wr_ctx,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_device *dev,
+ int is_dev_replace)
+{
+ WARN_ON(wr_ctx->wr_curr_bio != NULL);
+
+ mutex_init(&wr_ctx->wr_lock);
+ wr_ctx->wr_curr_bio = NULL;
+ if (!is_dev_replace)
+ return 0;
+
+ WARN_ON(!dev->bdev);
+ wr_ctx->pages_per_wr_bio = min_t(int, SCRUB_PAGES_PER_WR_BIO,
+ bio_get_nr_vecs(dev->bdev));
+ wr_ctx->tgtdev = dev;
+ atomic_set(&wr_ctx->flush_all_writes, 0);
+ return 0;
+}
+
+static void scrub_free_wr_ctx(struct scrub_wr_ctx *wr_ctx)
+{
+ mutex_lock(&wr_ctx->wr_lock);
+ kfree(wr_ctx->wr_curr_bio);
+ wr_ctx->wr_curr_bio = NULL;
+ mutex_unlock(&wr_ctx->wr_lock);
+}
+
+static int copy_nocow_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
+ int mirror_num, u64 physical_for_dev_replace)
+{
+ struct scrub_copy_nocow_ctx *nocow_ctx;
+ struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info;
+
+ nocow_ctx = kzalloc(sizeof(*nocow_ctx), GFP_NOFS);
+ if (!nocow_ctx) {
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
+ return -ENOMEM;
+ }
+
+ scrub_pending_trans_workers_inc(sctx);
+
+ nocow_ctx->sctx = sctx;
+ nocow_ctx->logical = logical;
+ nocow_ctx->len = len;
+ nocow_ctx->mirror_num = mirror_num;
+ nocow_ctx->physical_for_dev_replace = physical_for_dev_replace;
+ nocow_ctx->work.func = copy_nocow_pages_worker;
+ btrfs_queue_worker(&fs_info->scrub_nocow_workers,
+ &nocow_ctx->work);
+
+ return 0;
+}
+
+static void copy_nocow_pages_worker(struct btrfs_work *work)
+{
+ struct scrub_copy_nocow_ctx *nocow_ctx =
+ container_of(work, struct scrub_copy_nocow_ctx, work);
+ struct scrub_ctx *sctx = nocow_ctx->sctx;
+ u64 logical = nocow_ctx->logical;
+ u64 len = nocow_ctx->len;
+ int mirror_num = nocow_ctx->mirror_num;
+ u64 physical_for_dev_replace = nocow_ctx->physical_for_dev_replace;
+ int ret;
+ struct btrfs_trans_handle *trans = NULL;
+ struct btrfs_fs_info *fs_info;
+ struct btrfs_path *path;
+ struct btrfs_root *root;
+ int not_written = 0;
+
+ fs_info = sctx->dev_root->fs_info;
+ root = fs_info->extent_root;
+
+ path = btrfs_alloc_path();
+ if (!path) {
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
+ not_written = 1;
+ goto out;
+ }
+
+ trans = btrfs_join_transaction(root);
+ if (IS_ERR(trans)) {
+ not_written = 1;
+ goto out;
+ }
+
+ ret = iterate_inodes_from_logical(logical, fs_info, path,
+ copy_nocow_pages_for_inode,
+ nocow_ctx);
+ if (ret != 0 && ret != -ENOENT) {
+ pr_warn("iterate_inodes_from_logical() failed: log %llu, phys %llu, len %llu, mir %llu, ret %d\n",
+ (unsigned long long)logical,
+ (unsigned long long)physical_for_dev_replace,
+ (unsigned long long)len,
+ (unsigned long long)mirror_num, ret);
+ not_written = 1;
+ goto out;
+ }
+
+out:
+ if (trans && !IS_ERR(trans))
+ btrfs_end_transaction(trans, root);
+ if (not_written)
+ btrfs_dev_replace_stats_inc(&fs_info->dev_replace.
+ num_uncorrectable_read_errors);
+
+ btrfs_free_path(path);
+ kfree(nocow_ctx);
+
+ scrub_pending_trans_workers_dec(sctx);
+}
+
+static int copy_nocow_pages_for_inode(u64 inum, u64 offset, u64 root, void *ctx)
+{
+ unsigned long index;
+ struct scrub_copy_nocow_ctx *nocow_ctx = ctx;
+ int ret = 0;
+ struct btrfs_key key;
+ struct inode *inode = NULL;
+ struct btrfs_root *local_root;
+ u64 physical_for_dev_replace;
+ u64 len;
+ struct btrfs_fs_info *fs_info = nocow_ctx->sctx->dev_root->fs_info;
+
+ key.objectid = root;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+ key.offset = (u64)-1;
+ local_root = btrfs_read_fs_root_no_name(fs_info, &key);
+ if (IS_ERR(local_root))
+ return PTR_ERR(local_root);
+
+ key.type = BTRFS_INODE_ITEM_KEY;
+ key.objectid = inum;
+ key.offset = 0;
+ inode = btrfs_iget(fs_info->sb, &key, local_root, NULL);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ physical_for_dev_replace = nocow_ctx->physical_for_dev_replace;
+ len = nocow_ctx->len;
+ while (len >= PAGE_CACHE_SIZE) {
+ struct page *page = NULL;
+ int ret_sub;
+
+ index = offset >> PAGE_CACHE_SHIFT;
+
+ page = find_or_create_page(inode->i_mapping, index, GFP_NOFS);
+ if (!page) {
+ pr_err("find_or_create_page() failed\n");
+ ret = -ENOMEM;
+ goto next_page;
+ }
+
+ if (PageUptodate(page)) {
+ if (PageDirty(page))
+ goto next_page;
+ } else {
+ ClearPageError(page);
+ ret_sub = extent_read_full_page(&BTRFS_I(inode)->
+ io_tree,
+ page, btrfs_get_extent,
+ nocow_ctx->mirror_num);
+ if (ret_sub) {
+ ret = ret_sub;
+ goto next_page;
+ }
+ wait_on_page_locked(page);
+ if (!PageUptodate(page)) {
+ ret = -EIO;
+ goto next_page;
+ }
+ }
+ ret_sub = write_page_nocow(nocow_ctx->sctx,
+ physical_for_dev_replace, page);
+ if (ret_sub) {
+ ret = ret_sub;
+ goto next_page;
+ }
+
+next_page:
+ if (page) {
+ unlock_page(page);
+ put_page(page);
+ }
+ offset += PAGE_CACHE_SIZE;
+ physical_for_dev_replace += PAGE_CACHE_SIZE;
+ len -= PAGE_CACHE_SIZE;
+ }
+
+ if (inode)
+ iput(inode);
+ return ret;
+}
+
+static int write_page_nocow(struct scrub_ctx *sctx,
+ u64 physical_for_dev_replace, struct page *page)
+{
+ struct bio *bio;
+ struct btrfs_device *dev;
+ int ret;
+ DECLARE_COMPLETION_ONSTACK(compl);
+
+ dev = sctx->wr_ctx.tgtdev;
+ if (!dev)
+ return -EIO;
+ if (!dev->bdev) {
+ printk_ratelimited(KERN_WARNING
+ "btrfs: scrub write_page_nocow(bdev == NULL) is unexpected!\n");
+ return -EIO;
+ }
+ bio = bio_alloc(GFP_NOFS, 1);
+ if (!bio) {
+ spin_lock(&sctx->stat_lock);
+ sctx->stat.malloc_errors++;
+ spin_unlock(&sctx->stat_lock);
+ return -ENOMEM;
+ }
+ bio->bi_private = &compl;
+ bio->bi_end_io = scrub_complete_bio_end_io;
+ bio->bi_size = 0;
+ bio->bi_sector = physical_for_dev_replace >> 9;
+ bio->bi_bdev = dev->bdev;
+ ret = bio_add_page(bio, page, PAGE_CACHE_SIZE, 0);
+ if (ret != PAGE_CACHE_SIZE) {
+leave_with_eio:
+ bio_put(bio);
+ btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS);
+ return -EIO;
+ }
+ btrfsic_submit_bio(WRITE_SYNC, bio);
+ wait_for_completion(&compl);
+
+ if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
+ goto leave_with_eio;
+
+ bio_put(bio);
+ return 0;
}
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index e78b297b0b00..321b7fb4e441 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1814,8 +1814,10 @@ static int name_cache_insert(struct send_ctx *sctx,
(unsigned long)nce->ino);
if (!nce_head) {
nce_head = kmalloc(sizeof(*nce_head), GFP_NOFS);
- if (!nce_head)
+ if (!nce_head) {
+ kfree(nce);
return -ENOMEM;
+ }
INIT_LIST_HEAD(nce_head);
ret = radix_tree_insert(&sctx->name_cache, nce->ino, nce_head);
@@ -4397,9 +4399,9 @@ static int full_send_tree(struct send_ctx *sctx)
if (!path)
return -ENOMEM;
- spin_lock(&send_root->root_times_lock);
+ spin_lock(&send_root->root_item_lock);
start_ctransid = btrfs_root_ctransid(&send_root->root_item);
- spin_unlock(&send_root->root_times_lock);
+ spin_unlock(&send_root->root_item_lock);
key.objectid = BTRFS_FIRST_FREE_OBJECTID;
key.type = BTRFS_INODE_ITEM_KEY;
@@ -4422,9 +4424,9 @@ join_trans:
* Make sure the tree has not changed after re-joining. We detect this
* by comparing start_ctransid and ctransid. They should always match.
*/
- spin_lock(&send_root->root_times_lock);
+ spin_lock(&send_root->root_item_lock);
ctransid = btrfs_root_ctransid(&send_root->root_item);
- spin_unlock(&send_root->root_times_lock);
+ spin_unlock(&send_root->root_item_lock);
if (ctransid != start_ctransid) {
WARN(1, KERN_WARNING "btrfs: the root that you're trying to "
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 915ac14c2064..d8982e9601d3 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -55,6 +55,7 @@
#include "export.h"
#include "compression.h"
#include "rcu-string.h"
+#include "dev-replace.h"
#define CREATE_TRACE_POINTS
#include <trace/events/btrfs.h>
@@ -116,7 +117,16 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
sb->s_flags |= MS_RDONLY;
printk(KERN_INFO "btrfs is forced readonly\n");
- __btrfs_scrub_cancel(fs_info);
+ /*
+ * Note that a running device replace operation is not
+ * canceled here although there is no way to update
+ * the progress. It would add the risk of a deadlock,
+ * therefore the canceling is ommited. The only penalty
+ * is that some I/O remains active until the procedure
+ * completes. The next time when the filesystem is
+ * mounted writeable again, the device replace
+ * operation continues.
+ */
// WARN_ON(1);
}
}
@@ -257,7 +267,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
function, line, errstr);
return;
}
- trans->transaction->aborted = errno;
+ ACCESS_ONCE(trans->transaction->aborted) = errno;
__btrfs_std_error(root->fs_info, function, line, errno, NULL);
}
/*
@@ -1186,7 +1196,8 @@ static void btrfs_resize_thread_pool(struct btrfs_fs_info *fs_info,
btrfs_set_max_workers(&fs_info->endio_freespace_worker, new_pool_size);
btrfs_set_max_workers(&fs_info->delayed_workers, new_pool_size);
btrfs_set_max_workers(&fs_info->readahead_workers, new_pool_size);
- btrfs_set_max_workers(&fs_info->scrub_workers, new_pool_size);
+ btrfs_set_max_workers(&fs_info->scrub_wr_completion_workers,
+ new_pool_size);
}
static int btrfs_remount(struct super_block *sb, int *flags, char *data)
@@ -1215,8 +1226,15 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
return 0;
if (*flags & MS_RDONLY) {
+ /*
+ * this also happens on 'umount -rf' or on shutdown, when
+ * the filesystem is busy.
+ */
sb->s_flags |= MS_RDONLY;
+ btrfs_dev_replace_suspend_for_unmount(fs_info);
+ btrfs_scrub_cancel(fs_info);
+
ret = btrfs_commit_super(root);
if (ret)
goto restore;
@@ -1226,6 +1244,15 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
goto restore;
}
+ if (fs_info->fs_devices->missing_devices >
+ fs_info->num_tolerated_disk_barrier_failures &&
+ !(*flags & MS_RDONLY)) {
+ printk(KERN_WARNING
+ "Btrfs: too many missing devices, writeable remount is not allowed\n");
+ ret = -EACCES;
+ goto restore;
+ }
+
if (btrfs_super_log_root(fs_info->super_copy) != 0) {
ret = -EINVAL;
goto restore;
@@ -1244,6 +1271,11 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
if (ret)
goto restore;
+ ret = btrfs_resume_dev_replace_async(fs_info);
+ if (ret) {
+ pr_warn("btrfs: failed to resume dev_replace\n");
+ goto restore;
+ }
sb->s_flags &= ~MS_RDONLY;
}
@@ -1336,7 +1368,8 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes)
min_stripe_size = BTRFS_STRIPE_LEN;
list_for_each_entry(device, &fs_devices->devices, dev_list) {
- if (!device->in_fs_metadata || !device->bdev)
+ if (!device->in_fs_metadata || !device->bdev ||
+ device->is_tgtdev_for_dev_replace)
continue;
avail_space = device->total_bytes - device->bytes_used;
@@ -1647,10 +1680,14 @@ static int __init init_btrfs_fs(void)
if (err)
goto free_ordered_data;
- err = btrfs_interface_init();
+ err = btrfs_auto_defrag_init();
if (err)
goto free_delayed_inode;
+ err = btrfs_interface_init();
+ if (err)
+ goto free_auto_defrag;
+
err = register_filesystem(&btrfs_fs_type);
if (err)
goto unregister_ioctl;
@@ -1662,6 +1699,8 @@ static int __init init_btrfs_fs(void)
unregister_ioctl:
btrfs_interface_exit();
+free_auto_defrag:
+ btrfs_auto_defrag_exit();
free_delayed_inode:
btrfs_delayed_inode_exit();
free_ordered_data:
@@ -1681,6 +1720,7 @@ free_compress:
static void __exit exit_btrfs_fs(void)
{
btrfs_destroy_cachep();
+ btrfs_auto_defrag_exit();
btrfs_delayed_inode_exit();
ordered_data_exit();
extent_map_exit();
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 68704e74f0d3..fbe408204628 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -30,6 +30,7 @@
#include "tree-log.h"
#include "inode-map.h"
#include "volumes.h"
+#include "dev-replace.h"
#define BTRFS_ROOT_TRANS_TAG 0
@@ -144,16 +145,12 @@ loop:
* the log must never go across transaction boundaries.
*/
smp_mb();
- if (!list_empty(&fs_info->tree_mod_seq_list)) {
- printk(KERN_ERR "btrfs: tree_mod_seq_list not empty when "
+ if (!list_empty(&fs_info->tree_mod_seq_list))
+ WARN(1, KERN_ERR "btrfs: tree_mod_seq_list not empty when "
"creating a fresh transaction\n");
- WARN_ON(1);
- }
- if (!RB_EMPTY_ROOT(&fs_info->tree_mod_log)) {
- printk(KERN_ERR "btrfs: tree_mod_log rb tree not empty when "
+ if (!RB_EMPTY_ROOT(&fs_info->tree_mod_log))
+ WARN(1, KERN_ERR "btrfs: tree_mod_log rb tree not empty when "
"creating a fresh transaction\n");
- WARN_ON(1);
- }
atomic_set(&fs_info->tree_mod_seq, 0);
spin_lock_init(&cur_trans->commit_lock);
@@ -294,9 +291,9 @@ static int may_wait_transaction(struct btrfs_root *root, int type)
return 0;
}
-static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
- u64 num_items, int type,
- int noflush)
+static struct btrfs_trans_handle *
+start_transaction(struct btrfs_root *root, u64 num_items, int type,
+ enum btrfs_reserve_flush_enum flush)
{
struct btrfs_trans_handle *h;
struct btrfs_transaction *cur_trans;
@@ -311,6 +308,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
WARN_ON(type != TRANS_JOIN && type != TRANS_JOIN_NOLOCK);
h = current->journal_info;
h->use_count++;
+ WARN_ON(h->use_count > 2);
h->orig_rsv = h->block_rsv;
h->block_rsv = NULL;
goto got_it;
@@ -330,14 +328,9 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
}
num_bytes = btrfs_calc_trans_metadata_size(root, num_items);
- if (noflush)
- ret = btrfs_block_rsv_add_noflush(root,
- &root->fs_info->trans_block_rsv,
- num_bytes);
- else
- ret = btrfs_block_rsv_add(root,
- &root->fs_info->trans_block_rsv,
- num_bytes);
+ ret = btrfs_block_rsv_add(root,
+ &root->fs_info->trans_block_rsv,
+ num_bytes, flush);
if (ret)
return ERR_PTR(ret);
}
@@ -421,13 +414,15 @@ got_it:
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
int num_items)
{
- return start_transaction(root, num_items, TRANS_START, 0);
+ return start_transaction(root, num_items, TRANS_START,
+ BTRFS_RESERVE_FLUSH_ALL);
}
-struct btrfs_trans_handle *btrfs_start_transaction_noflush(
+struct btrfs_trans_handle *btrfs_start_transaction_lflush(
struct btrfs_root *root, int num_items)
{
- return start_transaction(root, num_items, TRANS_START, 1);
+ return start_transaction(root, num_items, TRANS_START,
+ BTRFS_RESERVE_FLUSH_LIMIT);
}
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)
@@ -460,28 +455,31 @@ static noinline void wait_for_commit(struct btrfs_root *root,
int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)
{
struct btrfs_transaction *cur_trans = NULL, *t;
- int ret;
+ int ret = 0;
- ret = 0;
if (transid) {
if (transid <= root->fs_info->last_trans_committed)
goto out;
+ ret = -EINVAL;
/* find specified transaction */
spin_lock(&root->fs_info->trans_lock);
list_for_each_entry(t, &root->fs_info->trans_list, list) {
if (t->transid == transid) {
cur_trans = t;
atomic_inc(&cur_trans->use_count);
+ ret = 0;
break;
}
- if (t->transid > transid)
+ if (t->transid > transid) {
+ ret = 0;
break;
+ }
}
spin_unlock(&root->fs_info->trans_lock);
- ret = -EINVAL;
+ /* The specified transaction doesn't exist */
if (!cur_trans)
- goto out; /* bad transid */
+ goto out;
} else {
/* find newest transaction that is committing | committed */
spin_lock(&root->fs_info->trans_lock);
@@ -501,9 +499,7 @@ int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)
}
wait_for_commit(root, cur_trans);
-
put_transaction(cur_trans);
- ret = 0;
out:
return ret;
}
@@ -850,7 +846,9 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
return ret;
ret = btrfs_run_dev_stats(trans, root->fs_info);
- BUG_ON(ret);
+ WARN_ON(ret);
+ ret = btrfs_run_dev_replace(trans, root->fs_info);
+ WARN_ON(ret);
ret = btrfs_run_qgroups(trans, root->fs_info);
BUG_ON(ret);
@@ -873,6 +871,8 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
switch_commit_root(fs_info->extent_root);
up_write(&fs_info->extent_commit_sem);
+ btrfs_after_dev_replace_commit(fs_info);
+
return 0;
}
@@ -957,7 +957,6 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly)
struct btrfs_fs_info *info = root->fs_info;
struct btrfs_trans_handle *trans;
int ret;
- unsigned long nr;
if (xchg(&root->defrag_running, 1))
return 0;
@@ -969,9 +968,8 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly)
ret = btrfs_defrag_leaves(trans, root, cacheonly);
- nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
- btrfs_btree_balance_dirty(info->tree_root, nr);
+ btrfs_btree_balance_dirty(info->tree_root);
cond_resched();
if (btrfs_fs_closing(root->fs_info) || ret != -EAGAIN)
@@ -1031,8 +1029,9 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
btrfs_reloc_pre_snapshot(trans, pending, &to_reserve);
if (to_reserve > 0) {
- ret = btrfs_block_rsv_add_noflush(root, &pending->block_rsv,
- to_reserve);
+ ret = btrfs_block_rsv_add(root, &pending->block_rsv,
+ to_reserve,
+ BTRFS_RESERVE_NO_FLUSH);
if (ret) {
pending->error = ret;
goto no_free_objectid;
@@ -1190,7 +1189,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
parent_inode, &key,
BTRFS_FT_DIR, index);
/* We have check then name at the beginning, so it is impossible. */
- BUG_ON(ret == -EEXIST);
+ BUG_ON(ret == -EEXIST || ret == -EOVERFLOW);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
@@ -1308,9 +1307,10 @@ static void do_async_commit(struct work_struct *work)
* We've got freeze protection passed with the transaction.
* Tell lockdep about it.
*/
- rwsem_acquire_read(
- &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
- 0, 1, _THIS_IP_);
+ if (ac->newtrans->type < TRANS_JOIN_NOLOCK)
+ rwsem_acquire_read(
+ &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
+ 0, 1, _THIS_IP_);
current->journal_info = ac->newtrans;
@@ -1348,8 +1348,10 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
* Tell lockdep we've released the freeze rwsem, since the
* async commit thread will be the one to unlock it.
*/
- rwsem_release(&root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
- 1, _THIS_IP_);
+ if (trans->type < TRANS_JOIN_NOLOCK)
+ rwsem_release(
+ &root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1],
+ 1, _THIS_IP_);
schedule_delayed_work(&ac->work, 0);
@@ -1399,6 +1401,48 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans,
kmem_cache_free(btrfs_trans_handle_cachep, trans);
}
+static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT);
+ int snap_pending = 0;
+ int ret;
+
+ if (!flush_on_commit) {
+ spin_lock(&root->fs_info->trans_lock);
+ if (!list_empty(&trans->transaction->pending_snapshots))
+ snap_pending = 1;
+ spin_unlock(&root->fs_info->trans_lock);
+ }
+
+ if (flush_on_commit || snap_pending) {
+ btrfs_start_delalloc_inodes(root, 1);
+ btrfs_wait_ordered_extents(root, 1);
+ }
+
+ ret = btrfs_run_delayed_items(trans, root);
+ if (ret)
+ return ret;
+
+ /*
+ * running the delayed items may have added new refs. account
+ * them now so that they hinder processing of more delayed refs
+ * as little as possible.
+ */
+ btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info);
+
+ /*
+ * rename don't use btrfs_join_transaction, so, once we
+ * set the transaction to blocked above, we aren't going
+ * to get any new ordered operations. We can safely run
+ * it here and no for sure that nothing new will be added
+ * to the list
+ */
+ btrfs_run_ordered_operations(root, 1);
+
+ return 0;
+}
+
/*
* btrfs_transaction state sequence:
* in_commit = 0, blocked = 0 (initial)
@@ -1413,15 +1457,21 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_transaction *cur_trans = trans->transaction;
struct btrfs_transaction *prev_trans = NULL;
DEFINE_WAIT(wait);
- int ret = -EIO;
+ int ret;
int should_grow = 0;
unsigned long now = get_seconds();
- int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT);
- btrfs_run_ordered_operations(root, 0);
+ ret = btrfs_run_ordered_operations(root, 0);
+ if (ret) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto cleanup_transaction;
+ }
- if (cur_trans->aborted)
+ /* Stop the commit early if ->aborted is set */
+ if (unlikely(ACCESS_ONCE(cur_trans->aborted))) {
+ ret = cur_trans->aborted;
goto cleanup_transaction;
+ }
/* make a pass through all the delayed refs we have so far
* any runnings procs may add more while we are here
@@ -1489,39 +1539,14 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
should_grow = 1;
do {
- int snap_pending = 0;
-
joined = cur_trans->num_joined;
- if (!list_empty(&trans->transaction->pending_snapshots))
- snap_pending = 1;
WARN_ON(cur_trans != trans->transaction);
- if (flush_on_commit || snap_pending) {
- btrfs_start_delalloc_inodes(root, 1);
- btrfs_wait_ordered_extents(root, 1);
- }
-
- ret = btrfs_run_delayed_items(trans, root);
+ ret = btrfs_flush_all_pending_stuffs(trans, root);
if (ret)
goto cleanup_transaction;
- /*
- * running the delayed items may have added new refs. account
- * them now so that they hinder processing of more delayed refs
- * as little as possible.
- */
- btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info);
-
- /*
- * rename don't use btrfs_join_transaction, so, once we
- * set the transaction to blocked above, we aren't going
- * to get any new ordered operations. We can safely run
- * it here and no for sure that nothing new will be added
- * to the list
- */
- btrfs_run_ordered_operations(root, 1);
-
prepare_to_wait(&cur_trans->writer_wait, &wait,
TASK_UNINTERRUPTIBLE);
@@ -1534,6 +1559,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
} while (atomic_read(&cur_trans->num_writers) > 1 ||
(should_grow && cur_trans->num_joined != joined));
+ ret = btrfs_flush_all_pending_stuffs(trans, root);
+ if (ret)
+ goto cleanup_transaction;
+
/*
* Ok now we need to make sure to block out any other joins while we
* commit the transaction. We could have started a join before setting
@@ -1545,6 +1574,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
wait_event(cur_trans->writer_wait,
atomic_read(&cur_trans->num_writers) == 1);
+ /* ->aborted might be set after the previous check, so check it */
+ if (unlikely(ACCESS_ONCE(cur_trans->aborted))) {
+ ret = cur_trans->aborted;
+ goto cleanup_transaction;
+ }
/*
* the reloc mutex makes sure that we stop
* the balancing code from coming in and moving
@@ -1628,6 +1662,17 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
goto cleanup_transaction;
}
+ /*
+ * The tasks which save the space cache and inode cache may also
+ * update ->aborted, check it.
+ */
+ if (unlikely(ACCESS_ONCE(cur_trans->aborted))) {
+ ret = cur_trans->aborted;
+ mutex_unlock(&root->fs_info->tree_log_mutex);
+ mutex_unlock(&root->fs_info->reloc_mutex);
+ goto cleanup_transaction;
+ }
+
btrfs_prepare_extent_commit(trans, root);
cur_trans = root->fs_info->running_transaction;
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 80961947a6b2..0e8aa1e6c287 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -105,7 +105,7 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
int num_items);
-struct btrfs_trans_handle *btrfs_start_transaction_noflush(
+struct btrfs_trans_handle *btrfs_start_transaction_lflush(
struct btrfs_root *root, int num_items);
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 81e407d9677a..9027bb1e7466 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2952,33 +2952,9 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
struct btrfs_inode_item *item,
struct inode *inode, int log_inode_only)
{
- btrfs_set_inode_uid(leaf, item, i_uid_read(inode));
- btrfs_set_inode_gid(leaf, item, i_gid_read(inode));
- btrfs_set_inode_mode(leaf, item, inode->i_mode);
- btrfs_set_inode_nlink(leaf, item, inode->i_nlink);
-
- btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item),
- inode->i_atime.tv_sec);
- btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item),
- inode->i_atime.tv_nsec);
-
- btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item),
- inode->i_mtime.tv_sec);
- btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item),
- inode->i_mtime.tv_nsec);
-
- btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item),
- inode->i_ctime.tv_sec);
- btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item),
- inode->i_ctime.tv_nsec);
-
- btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode));
-
- btrfs_set_inode_sequence(leaf, item, inode->i_version);
- btrfs_set_inode_transid(leaf, item, trans->transid);
- btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
- btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags);
- btrfs_set_inode_block_group(leaf, item, 0);
+ struct btrfs_map_token token;
+
+ btrfs_init_map_token(&token);
if (log_inode_only) {
/* set the generation to zero so the recover code
@@ -2986,14 +2962,63 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
* just to say 'this inode exists' and a logging
* to say 'update this inode with these values'
*/
- btrfs_set_inode_generation(leaf, item, 0);
- btrfs_set_inode_size(leaf, item, 0);
+ btrfs_set_token_inode_generation(leaf, item, 0, &token);
+ btrfs_set_token_inode_size(leaf, item, 0, &token);
} else {
- btrfs_set_inode_generation(leaf, item,
- BTRFS_I(inode)->generation);
- btrfs_set_inode_size(leaf, item, inode->i_size);
- }
+ btrfs_set_token_inode_generation(leaf, item,
+ BTRFS_I(inode)->generation,
+ &token);
+ btrfs_set_token_inode_size(leaf, item, inode->i_size, &token);
+ }
+
+ btrfs_set_token_inode_uid(leaf, item, i_uid_read(inode), &token);
+ btrfs_set_token_inode_gid(leaf, item, i_gid_read(inode), &token);
+ btrfs_set_token_inode_mode(leaf, item, inode->i_mode, &token);
+ btrfs_set_token_inode_nlink(leaf, item, inode->i_nlink, &token);
+
+ btrfs_set_token_timespec_sec(leaf, btrfs_inode_atime(item),
+ inode->i_atime.tv_sec, &token);
+ btrfs_set_token_timespec_nsec(leaf, btrfs_inode_atime(item),
+ inode->i_atime.tv_nsec, &token);
+
+ btrfs_set_token_timespec_sec(leaf, btrfs_inode_mtime(item),
+ inode->i_mtime.tv_sec, &token);
+ btrfs_set_token_timespec_nsec(leaf, btrfs_inode_mtime(item),
+ inode->i_mtime.tv_nsec, &token);
+
+ btrfs_set_token_timespec_sec(leaf, btrfs_inode_ctime(item),
+ inode->i_ctime.tv_sec, &token);
+ btrfs_set_token_timespec_nsec(leaf, btrfs_inode_ctime(item),
+ inode->i_ctime.tv_nsec, &token);
+
+ btrfs_set_token_inode_nbytes(leaf, item, inode_get_bytes(inode),
+ &token);
+
+ btrfs_set_token_inode_sequence(leaf, item, inode->i_version, &token);
+ btrfs_set_token_inode_transid(leaf, item, trans->transid, &token);
+ btrfs_set_token_inode_rdev(leaf, item, inode->i_rdev, &token);
+ btrfs_set_token_inode_flags(leaf, item, BTRFS_I(inode)->flags, &token);
+ btrfs_set_token_inode_block_group(leaf, item, 0, &token);
+}
+static int log_inode_item(struct btrfs_trans_handle *trans,
+ struct btrfs_root *log, struct btrfs_path *path,
+ struct inode *inode)
+{
+ struct btrfs_inode_item *inode_item;
+ struct btrfs_key key;
+ int ret;
+
+ memcpy(&key, &BTRFS_I(inode)->location, sizeof(key));
+ ret = btrfs_insert_empty_item(trans, log, path, &key,
+ sizeof(*inode_item));
+ if (ret && ret != -EEXIST)
+ return ret;
+ inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_inode_item);
+ fill_inode_item(trans, path->nodes[0], inode_item, inode, 0);
+ btrfs_release_path(path);
+ return 0;
}
static noinline int copy_items(struct btrfs_trans_handle *trans,
@@ -3130,151 +3155,239 @@ static int extent_cmp(void *priv, struct list_head *a, struct list_head *b)
return 0;
}
-struct log_args {
- struct extent_buffer *src;
- u64 next_offset;
- int start_slot;
- int nr;
-};
+static int drop_adjacent_extents(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct inode *inode,
+ struct extent_map *em,
+ struct btrfs_path *path)
+{
+ struct btrfs_file_extent_item *fi;
+ struct extent_buffer *leaf;
+ struct btrfs_key key, new_key;
+ struct btrfs_map_token token;
+ u64 extent_end;
+ u64 extent_offset = 0;
+ int extent_type;
+ int del_slot = 0;
+ int del_nr = 0;
+ int ret = 0;
+
+ while (1) {
+ btrfs_init_map_token(&token);
+ leaf = path->nodes[0];
+ path->slots[0]++;
+ if (path->slots[0] >= btrfs_header_nritems(leaf)) {
+ if (del_nr) {
+ ret = btrfs_del_items(trans, root, path,
+ del_slot, del_nr);
+ if (ret)
+ return ret;
+ del_nr = 0;
+ }
+
+ ret = btrfs_next_leaf_write(trans, root, path, 1);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ return 0;
+ leaf = path->nodes[0];
+ }
+
+ btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+ if (key.objectid != btrfs_ino(inode) ||
+ key.type != BTRFS_EXTENT_DATA_KEY ||
+ key.offset >= em->start + em->len)
+ break;
+
+ fi = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ extent_type = btrfs_token_file_extent_type(leaf, fi, &token);
+ if (extent_type == BTRFS_FILE_EXTENT_REG ||
+ extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
+ extent_offset = btrfs_token_file_extent_offset(leaf,
+ fi, &token);
+ extent_end = key.offset +
+ btrfs_token_file_extent_num_bytes(leaf, fi,
+ &token);
+ } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
+ extent_end = key.offset +
+ btrfs_file_extent_inline_len(leaf, fi);
+ } else {
+ BUG();
+ }
+
+ if (extent_end <= em->len + em->start) {
+ if (!del_nr) {
+ del_slot = path->slots[0];
+ }
+ del_nr++;
+ continue;
+ }
+
+ /*
+ * Ok so we'll ignore previous items if we log a new extent,
+ * which can lead to overlapping extents, so if we have an
+ * existing extent we want to adjust we _have_ to check the next
+ * guy to make sure we even need this extent anymore, this keeps
+ * us from panicing in set_item_key_safe.
+ */
+ if (path->slots[0] < btrfs_header_nritems(leaf) - 1) {
+ struct btrfs_key tmp_key;
+
+ btrfs_item_key_to_cpu(leaf, &tmp_key,
+ path->slots[0] + 1);
+ if (tmp_key.objectid == btrfs_ino(inode) &&
+ tmp_key.type == BTRFS_EXTENT_DATA_KEY &&
+ tmp_key.offset <= em->start + em->len) {
+ if (!del_nr)
+ del_slot = path->slots[0];
+ del_nr++;
+ continue;
+ }
+ }
+
+ BUG_ON(extent_type == BTRFS_FILE_EXTENT_INLINE);
+ memcpy(&new_key, &key, sizeof(new_key));
+ new_key.offset = em->start + em->len;
+ btrfs_set_item_key_safe(trans, root, path, &new_key);
+ extent_offset += em->start + em->len - key.offset;
+ btrfs_set_token_file_extent_offset(leaf, fi, extent_offset,
+ &token);
+ btrfs_set_token_file_extent_num_bytes(leaf, fi, extent_end -
+ (em->start + em->len),
+ &token);
+ btrfs_mark_buffer_dirty(leaf);
+ }
+
+ if (del_nr)
+ ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
+
+ return ret;
+}
static int log_one_extent(struct btrfs_trans_handle *trans,
struct inode *inode, struct btrfs_root *root,
- struct extent_map *em, struct btrfs_path *path,
- struct btrfs_path *dst_path, struct log_args *args)
+ struct extent_map *em, struct btrfs_path *path)
{
struct btrfs_root *log = root->log_root;
struct btrfs_file_extent_item *fi;
+ struct extent_buffer *leaf;
+ struct list_head ordered_sums;
+ struct btrfs_map_token token;
struct btrfs_key key;
- u64 start = em->mod_start;
- u64 search_start = start;
- u64 len = em->mod_len;
- u64 num_bytes;
- int nritems;
+ u64 csum_offset = em->mod_start - em->start;
+ u64 csum_len = em->mod_len;
+ u64 extent_offset = em->start - em->orig_start;
+ u64 block_len;
int ret;
+ bool skip_csum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
- if (BTRFS_I(inode)->logged_trans == trans->transid) {
- ret = __btrfs_drop_extents(trans, log, inode, dst_path, start,
- start + len, NULL, 0);
- if (ret)
- return ret;
+ INIT_LIST_HEAD(&ordered_sums);
+ btrfs_init_map_token(&token);
+ key.objectid = btrfs_ino(inode);
+ key.type = BTRFS_EXTENT_DATA_KEY;
+ key.offset = em->start;
+ path->really_keep_locks = 1;
+
+ ret = btrfs_insert_empty_item(trans, log, path, &key, sizeof(*fi));
+ if (ret && ret != -EEXIST) {
+ path->really_keep_locks = 0;
+ return ret;
}
+ leaf = path->nodes[0];
+ fi = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ btrfs_set_token_file_extent_generation(leaf, fi, em->generation,
+ &token);
+ if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
+ skip_csum = true;
+ btrfs_set_token_file_extent_type(leaf, fi,
+ BTRFS_FILE_EXTENT_PREALLOC,
+ &token);
+ } else {
+ btrfs_set_token_file_extent_type(leaf, fi,
+ BTRFS_FILE_EXTENT_REG,
+ &token);
+ if (em->block_start == 0)
+ skip_csum = true;
+ }
+
+ block_len = max(em->block_len, em->orig_block_len);
+ if (em->compress_type != BTRFS_COMPRESS_NONE) {
+ btrfs_set_token_file_extent_disk_bytenr(leaf, fi,
+ em->block_start,
+ &token);
+ btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, block_len,
+ &token);
+ } else if (em->block_start < EXTENT_MAP_LAST_BYTE) {
+ btrfs_set_token_file_extent_disk_bytenr(leaf, fi,
+ em->block_start -
+ extent_offset, &token);
+ btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, block_len,
+ &token);
+ } else {
+ btrfs_set_token_file_extent_disk_bytenr(leaf, fi, 0, &token);
+ btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, 0,
+ &token);
+ }
+
+ btrfs_set_token_file_extent_offset(leaf, fi,
+ em->start - em->orig_start,
+ &token);
+ btrfs_set_token_file_extent_num_bytes(leaf, fi, em->len, &token);
+ btrfs_set_token_file_extent_ram_bytes(leaf, fi, em->len, &token);
+ btrfs_set_token_file_extent_compression(leaf, fi, em->compress_type,
+ &token);
+ btrfs_set_token_file_extent_encryption(leaf, fi, 0, &token);
+ btrfs_set_token_file_extent_other_encoding(leaf, fi, 0, &token);
+ btrfs_mark_buffer_dirty(leaf);
- while (len) {
- if (args->nr)
- goto next_slot;
-again:
- key.objectid = btrfs_ino(inode);
- key.type = BTRFS_EXTENT_DATA_KEY;
- key.offset = search_start;
-
- ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
- if (ret < 0)
- return ret;
-
- if (ret) {
- /*
- * A rare case were we can have an em for a section of a
- * larger extent so we need to make sure that this em
- * falls within the extent we've found. If not we just
- * bail and go back to ye-olde way of doing things but
- * it happens often enough in testing that we need to do
- * this dance to make sure.
- */
- do {
- if (path->slots[0] == 0) {
- btrfs_release_path(path);
- if (search_start == 0)
- return -ENOENT;
- search_start--;
- goto again;
- }
+ /*
+ * Have to check the extent to the right of us to make sure it doesn't
+ * fall in our current range. We're ok if the previous extent is in our
+ * range since the recovery stuff will run us in key order and thus just
+ * drop the part we overwrote.
+ */
+ ret = drop_adjacent_extents(trans, log, inode, em, path);
+ btrfs_release_path(path);
+ path->really_keep_locks = 0;
+ if (ret) {
+ return ret;
+ }
- path->slots[0]--;
- btrfs_item_key_to_cpu(path->nodes[0], &key,
- path->slots[0]);
- if (key.objectid != btrfs_ino(inode) ||
- key.type != BTRFS_EXTENT_DATA_KEY) {
- btrfs_release_path(path);
- return -ENOENT;
- }
- } while (key.offset > start);
+ if (skip_csum)
+ return 0;
- fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_file_extent_item);
- num_bytes = btrfs_file_extent_num_bytes(path->nodes[0],
- fi);
- if (key.offset + num_bytes <= start) {
- btrfs_release_path(path);
- return -ENOENT;
- }
- }
- args->src = path->nodes[0];
-next_slot:
- btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]);
- fi = btrfs_item_ptr(args->src, path->slots[0],
- struct btrfs_file_extent_item);
- if (args->nr &&
- args->start_slot + args->nr == path->slots[0]) {
- args->nr++;
- } else if (args->nr) {
- ret = copy_items(trans, inode, dst_path, args->src,
- args->start_slot, args->nr,
- LOG_INODE_ALL);
- if (ret)
- return ret;
- args->nr = 1;
- args->start_slot = path->slots[0];
- } else if (!args->nr) {
- args->nr = 1;
- args->start_slot = path->slots[0];
- }
- nritems = btrfs_header_nritems(path->nodes[0]);
- path->slots[0]++;
- num_bytes = btrfs_file_extent_num_bytes(args->src, fi);
- if (len < num_bytes) {
- /* I _think_ this is ok, envision we write to a
- * preallocated space that is adjacent to a previously
- * written preallocated space that gets merged when we
- * mark this preallocated space written. If we do not
- * have the adjacent extent in cache then when we copy
- * this extent it could end up being larger than our EM
- * thinks it is, which is a-ok, so just set len to 0.
- */
- len = 0;
- } else {
- len -= num_bytes;
- }
- start = key.offset + num_bytes;
- args->next_offset = start;
- search_start = start;
+ if (em->compress_type) {
+ csum_offset = 0;
+ csum_len = block_len;
+ }
- if (path->slots[0] < nritems) {
- if (len)
- goto next_slot;
- break;
- }
+ /* block start is already adjusted for the file extent offset. */
+ ret = btrfs_lookup_csums_range(log->fs_info->csum_root,
+ em->block_start + csum_offset,
+ em->block_start + csum_offset +
+ csum_len - 1, &ordered_sums, 0);
+ if (ret)
+ return ret;
- if (args->nr) {
- ret = copy_items(trans, inode, dst_path, args->src,
- args->start_slot, args->nr,
- LOG_INODE_ALL);
- if (ret)
- return ret;
- args->nr = 0;
- btrfs_release_path(path);
- }
+ while (!list_empty(&ordered_sums)) {
+ struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next,
+ struct btrfs_ordered_sum,
+ list);
+ if (!ret)
+ ret = btrfs_csum_file_blocks(trans, log, sums);
+ list_del(&sums->list);
+ kfree(sums);
}
- return 0;
+ return ret;
}
static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode,
- struct btrfs_path *path,
- struct btrfs_path *dst_path)
+ struct btrfs_path *path)
{
- struct log_args args;
struct extent_map *em, *n;
struct list_head extents;
struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree;
@@ -3283,8 +3396,6 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
INIT_LIST_HEAD(&extents);
- memset(&args, 0, sizeof(args));
-
write_lock(&tree->lock);
test_gen = root->fs_info->last_trans_committed;
@@ -3304,47 +3415,27 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
em = list_entry(extents.next, struct extent_map, list);
list_del_init(&em->list);
- clear_bit(EXTENT_FLAG_LOGGING, &em->flags);
/*
* If we had an error we just need to delete everybody from our
* private list.
*/
if (ret) {
+ clear_em_logging(tree, em);
free_extent_map(em);
continue;
}
write_unlock(&tree->lock);
- /*
- * If the previous EM and the last extent we left off on aren't
- * sequential then we need to copy the items we have and redo
- * our search
- */
- if (args.nr && em->mod_start != args.next_offset) {
- ret = copy_items(trans, inode, dst_path, args.src,
- args.start_slot, args.nr,
- LOG_INODE_ALL);
- if (ret) {
- free_extent_map(em);
- write_lock(&tree->lock);
- continue;
- }
- btrfs_release_path(path);
- args.nr = 0;
- }
-
- ret = log_one_extent(trans, inode, root, em, path, dst_path, &args);
- free_extent_map(em);
+ ret = log_one_extent(trans, inode, root, em, path);
write_lock(&tree->lock);
+ clear_em_logging(tree, em);
+ free_extent_map(em);
}
WARN_ON(!list_empty(&extents));
write_unlock(&tree->lock);
- if (!ret && args.nr)
- ret = copy_items(trans, inode, dst_path, args.src,
- args.start_slot, args.nr, LOG_INODE_ALL);
btrfs_release_path(path);
return ret;
}
@@ -3400,7 +3491,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
/* today the code can only do partial logging of directories */
- if (inode_only == LOG_INODE_EXISTS || S_ISDIR(inode->i_mode))
+ if (S_ISDIR(inode->i_mode) ||
+ (!test_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
+ &BTRFS_I(inode)->runtime_flags) &&
+ inode_only == LOG_INODE_EXISTS))
max_key.type = BTRFS_XATTR_ITEM_KEY;
else
max_key.type = (u8)-1;
@@ -3432,14 +3526,28 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
} else {
if (test_and_clear_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags)) {
+ clear_bit(BTRFS_INODE_COPY_EVERYTHING,
+ &BTRFS_I(inode)->runtime_flags);
ret = btrfs_truncate_inode_items(trans, log,
inode, 0, 0);
- } else {
- fast_search = true;
+ } else if (test_and_clear_bit(BTRFS_INODE_COPY_EVERYTHING,
+ &BTRFS_I(inode)->runtime_flags)) {
+ if (inode_only == LOG_INODE_ALL)
+ fast_search = true;
max_key.type = BTRFS_XATTR_ITEM_KEY;
ret = drop_objectid_items(trans, log, path, ino,
- BTRFS_XATTR_ITEM_KEY);
+ max_key.type);
+ } else {
+ if (inode_only == LOG_INODE_ALL)
+ fast_search = true;
+ ret = log_inode_item(trans, log, dst_path, inode);
+ if (ret) {
+ err = ret;
+ goto out_unlock;
+ }
+ goto log_extents;
}
+
}
if (ret) {
err = ret;
@@ -3518,11 +3626,10 @@ next_slot:
ins_nr = 0;
}
+log_extents:
if (fast_search) {
- btrfs_release_path(path);
btrfs_release_path(dst_path);
- ret = btrfs_log_changed_extents(trans, root, inode, path,
- dst_path);
+ ret = btrfs_log_changed_extents(trans, root, inode, dst_path);
if (ret) {
err = ret;
goto out_unlock;
@@ -3531,8 +3638,10 @@ next_slot:
struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree;
struct extent_map *em, *n;
+ write_lock(&tree->lock);
list_for_each_entry_safe(em, n, &tree->modified_extents, list)
list_del_init(&em->list);
+ write_unlock(&tree->lock);
}
if (inode_only == LOG_INODE_ALL && S_ISDIR(inode->i_mode)) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e3c6ee3cc2ba..15f6efdf6463 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -25,7 +25,6 @@
#include <linux/capability.h>
#include <linux/ratelimit.h>
#include <linux/kthread.h>
-#include <asm/div64.h>
#include "compat.h"
#include "ctree.h"
#include "extent_map.h"
@@ -36,6 +35,8 @@
#include "async-thread.h"
#include "check-integrity.h"
#include "rcu-string.h"
+#include "math.h"
+#include "dev-replace.h"
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
@@ -71,6 +72,19 @@ static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
kfree(fs_devices);
}
+static void btrfs_kobject_uevent(struct block_device *bdev,
+ enum kobject_action action)
+{
+ int ret;
+
+ ret = kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, action);
+ if (ret)
+ pr_warn("Sending event '%d' to kobject: '%s' (%p): failed\n",
+ action,
+ kobject_name(&disk_to_dev(bdev->bd_disk)->kobj),
+ &disk_to_dev(bdev->bd_disk)->kobj);
+}
+
void btrfs_cleanup_fs_uuids(void)
{
struct btrfs_fs_devices *fs_devices;
@@ -108,6 +122,44 @@ static noinline struct btrfs_fs_devices *find_fsid(u8 *fsid)
return NULL;
}
+static int
+btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder,
+ int flush, struct block_device **bdev,
+ struct buffer_head **bh)
+{
+ int ret;
+
+ *bdev = blkdev_get_by_path(device_path, flags, holder);
+
+ if (IS_ERR(*bdev)) {
+ ret = PTR_ERR(*bdev);
+ printk(KERN_INFO "btrfs: open %s failed\n", device_path);
+ goto error;
+ }
+
+ if (flush)
+ filemap_write_and_wait((*bdev)->bd_inode->i_mapping);
+ ret = set_blocksize(*bdev, 4096);
+ if (ret) {
+ blkdev_put(*bdev, flags);
+ goto error;
+ }
+ invalidate_bdev(*bdev);
+ *bh = btrfs_read_dev_super(*bdev);
+ if (!*bh) {
+ ret = -EINVAL;
+ blkdev_put(*bdev, flags);
+ goto error;
+ }
+
+ return 0;
+
+error:
+ *bdev = NULL;
+ *bh = NULL;
+ return ret;
+}
+
static void requeue_list(struct btrfs_pending_bios *pending_bios,
struct bio *head, struct bio *tail)
{
@@ -467,7 +519,8 @@ error:
return ERR_PTR(-ENOMEM);
}
-void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
+void btrfs_close_extra_devices(struct btrfs_fs_info *fs_info,
+ struct btrfs_fs_devices *fs_devices, int step)
{
struct btrfs_device *device, *next;
@@ -480,8 +533,9 @@ again:
/* This is the initialized path, it is safe to release the devices. */
list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
if (device->in_fs_metadata) {
- if (!latest_transid ||
- device->generation > latest_transid) {
+ if (!device->is_tgtdev_for_dev_replace &&
+ (!latest_transid ||
+ device->generation > latest_transid)) {
latest_devid = device->devid;
latest_transid = device->generation;
latest_bdev = device->bdev;
@@ -489,6 +543,21 @@ again:
continue;
}
+ if (device->devid == BTRFS_DEV_REPLACE_DEVID) {
+ /*
+ * In the first step, keep the device which has
+ * the correct fsid and the devid that is used
+ * for the dev_replace procedure.
+ * In the second step, the dev_replace state is
+ * read from the device tree and it is known
+ * whether the procedure is really active or
+ * not, which means whether this device is
+ * used or whether it should be removed.
+ */
+ if (step == 0 || device->is_tgtdev_for_dev_replace) {
+ continue;
+ }
+ }
if (device->bdev) {
blkdev_put(device->bdev, device->mode);
device->bdev = NULL;
@@ -497,7 +566,8 @@ again:
if (device->writeable) {
list_del_init(&device->dev_alloc_list);
device->writeable = 0;
- fs_devices->rw_devices--;
+ if (!device->is_tgtdev_for_dev_replace)
+ fs_devices->rw_devices--;
}
list_del_init(&device->dev_list);
fs_devices->num_devices--;
@@ -555,7 +625,7 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
if (device->bdev)
fs_devices->open_devices--;
- if (device->writeable) {
+ if (device->writeable && !device->is_tgtdev_for_dev_replace) {
list_del_init(&device->dev_alloc_list);
fs_devices->rw_devices--;
}
@@ -637,18 +707,10 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
if (!device->name)
continue;
- bdev = blkdev_get_by_path(device->name->str, flags, holder);
- if (IS_ERR(bdev)) {
- printk(KERN_INFO "btrfs: open %s failed\n", device->name->str);
- goto error;
- }
- filemap_write_and_wait(bdev->bd_inode->i_mapping);
- invalidate_bdev(bdev);
- set_blocksize(bdev, 4096);
-
- bh = btrfs_read_dev_super(bdev);
- if (!bh)
- goto error_close;
+ ret = btrfs_get_bdev_and_sb(device->name->str, flags, holder, 1,
+ &bdev, &bh);
+ if (ret)
+ continue;
disk_super = (struct btrfs_super_block *)bh->b_data;
devid = btrfs_stack_device_id(&disk_super->dev_item);
@@ -687,7 +749,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
fs_devices->rotating = 1;
fs_devices->open_devices++;
- if (device->writeable) {
+ if (device->writeable && !device->is_tgtdev_for_dev_replace) {
fs_devices->rw_devices++;
list_add(&device->dev_alloc_list,
&fs_devices->alloc_list);
@@ -697,9 +759,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
error_brelse:
brelse(bh);
-error_close:
blkdev_put(bdev, flags);
-error:
continue;
}
if (fs_devices->open_devices == 0) {
@@ -744,40 +804,30 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
u64 total_devices;
flags |= FMODE_EXCL;
- bdev = blkdev_get_by_path(path, flags, holder);
-
- if (IS_ERR(bdev)) {
- ret = PTR_ERR(bdev);
- goto error;
- }
-
mutex_lock(&uuid_mutex);
- ret = set_blocksize(bdev, 4096);
+ ret = btrfs_get_bdev_and_sb(path, flags, holder, 0, &bdev, &bh);
if (ret)
- goto error_close;
- bh = btrfs_read_dev_super(bdev);
- if (!bh) {
- ret = -EINVAL;
- goto error_close;
- }
+ goto error;
disk_super = (struct btrfs_super_block *)bh->b_data;
devid = btrfs_stack_device_id(&disk_super->dev_item);
transid = btrfs_super_generation(disk_super);
total_devices = btrfs_super_num_devices(disk_super);
- if (disk_super->label[0])
+ if (disk_super->label[0]) {
+ if (disk_super->label[BTRFS_LABEL_SIZE - 1])
+ disk_super->label[BTRFS_LABEL_SIZE - 1] = '\0';
printk(KERN_INFO "device label %s ", disk_super->label);
- else
+ } else {
printk(KERN_INFO "device fsid %pU ", disk_super->fsid);
+ }
printk(KERN_CONT "devid %llu transid %llu %s\n",
(unsigned long long)devid, (unsigned long long)transid, path);
ret = device_list_add(path, disk_super, devid, fs_devices_ret);
if (!ret && fs_devices_ret)
(*fs_devices_ret)->total_devices = total_devices;
brelse(bh);
-error_close:
- mutex_unlock(&uuid_mutex);
blkdev_put(bdev, flags);
error:
+ mutex_unlock(&uuid_mutex);
return ret;
}
@@ -796,7 +846,7 @@ int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
*length = 0;
- if (start >= device->total_bytes)
+ if (start >= device->total_bytes || device->is_tgtdev_for_dev_replace)
return 0;
path = btrfs_alloc_path();
@@ -913,7 +963,7 @@ int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
max_hole_size = 0;
hole_size = 0;
- if (search_start >= search_end) {
+ if (search_start >= search_end || device->is_tgtdev_for_dev_replace) {
ret = -ENOSPC;
goto error;
}
@@ -1096,6 +1146,7 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_key key;
WARN_ON(!device->in_fs_metadata);
+ WARN_ON(device->is_tgtdev_for_dev_replace);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -1330,16 +1381,22 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
root->fs_info->avail_system_alloc_bits |
root->fs_info->avail_metadata_alloc_bits;
- if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) &&
- root->fs_info->fs_devices->num_devices <= 4) {
+ num_devices = root->fs_info->fs_devices->num_devices;
+ btrfs_dev_replace_lock(&root->fs_info->dev_replace);
+ if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) {
+ WARN_ON(num_devices < 1);
+ num_devices--;
+ }
+ btrfs_dev_replace_unlock(&root->fs_info->dev_replace);
+
+ if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) {
printk(KERN_ERR "btrfs: unable to go below four devices "
"on raid10\n");
ret = -EINVAL;
goto out;
}
- if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) &&
- root->fs_info->fs_devices->num_devices <= 2) {
+ if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) && num_devices <= 2) {
printk(KERN_ERR "btrfs: unable to go below two "
"devices on raid1\n");
ret = -EINVAL;
@@ -1357,7 +1414,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
* is held.
*/
list_for_each_entry(tmp, devices, dev_list) {
- if (tmp->in_fs_metadata && !tmp->bdev) {
+ if (tmp->in_fs_metadata &&
+ !tmp->is_tgtdev_for_dev_replace &&
+ !tmp->bdev) {
device = tmp;
break;
}
@@ -1371,24 +1430,16 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
goto out;
}
} else {
- bdev = blkdev_get_by_path(device_path, FMODE_READ | FMODE_EXCL,
- root->fs_info->bdev_holder);
- if (IS_ERR(bdev)) {
- ret = PTR_ERR(bdev);
+ ret = btrfs_get_bdev_and_sb(device_path,
+ FMODE_WRITE | FMODE_EXCL,
+ root->fs_info->bdev_holder, 0,
+ &bdev, &bh);
+ if (ret)
goto out;
- }
-
- set_blocksize(bdev, 4096);
- invalidate_bdev(bdev);
- bh = btrfs_read_dev_super(bdev);
- if (!bh) {
- ret = -EINVAL;
- goto error_close;
- }
disk_super = (struct btrfs_super_block *)bh->b_data;
devid = btrfs_stack_device_id(&disk_super->dev_item);
dev_uuid = disk_super->dev_item.uuid;
- device = btrfs_find_device(root, devid, dev_uuid,
+ device = btrfs_find_device(root->fs_info, devid, dev_uuid,
disk_super->fsid);
if (!device) {
ret = -ENOENT;
@@ -1396,6 +1447,12 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
}
}
+ if (device->is_tgtdev_for_dev_replace) {
+ pr_err("btrfs: unable to remove the dev_replace target dev\n");
+ ret = -EINVAL;
+ goto error_brelse;
+ }
+
if (device->writeable && root->fs_info->fs_devices->rw_devices == 1) {
printk(KERN_ERR "btrfs: unable to remove the only writeable "
"device\n");
@@ -1415,6 +1472,11 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
if (ret)
goto error_undo;
+ /*
+ * TODO: the superblock still includes this device in its num_devices
+ * counter although write_all_supers() is not locked out. This
+ * could give a filesystem state which requires a degraded mount.
+ */
ret = btrfs_rm_dev_item(root->fs_info->chunk_root, device);
if (ret)
goto error_undo;
@@ -1425,7 +1487,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
spin_unlock(&root->fs_info->free_chunk_lock);
device->in_fs_metadata = 0;
- btrfs_scrub_cancel_dev(root, device);
+ btrfs_scrub_cancel_dev(root->fs_info, device);
/*
* the device list mutex makes sure that we don't change
@@ -1482,7 +1544,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
* at this point, the device is zero sized. We want to
* remove it from the devices list and zero out the old super
*/
- if (clear_super) {
+ if (clear_super && disk_super) {
/* make sure this device isn't detected as part of
* the FS anymore
*/
@@ -1493,9 +1555,11 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
ret = 0;
+ /* Notify udev that device has changed */
+ btrfs_kobject_uevent(bdev, KOBJ_CHANGE);
+
error_brelse:
brelse(bh);
-error_close:
if (bdev)
blkdev_put(bdev, FMODE_READ | FMODE_EXCL);
out:
@@ -1512,6 +1576,112 @@ error_undo:
goto error_brelse;
}
+void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *srcdev)
+{
+ WARN_ON(!mutex_is_locked(&fs_info->fs_devices->device_list_mutex));
+ list_del_rcu(&srcdev->dev_list);
+ list_del_rcu(&srcdev->dev_alloc_list);
+ fs_info->fs_devices->num_devices--;
+ if (srcdev->missing) {
+ fs_info->fs_devices->missing_devices--;
+ fs_info->fs_devices->rw_devices++;
+ }
+ if (srcdev->can_discard)
+ fs_info->fs_devices->num_can_discard--;
+ if (srcdev->bdev)
+ fs_info->fs_devices->open_devices--;
+
+ call_rcu(&srcdev->rcu, free_device);
+}
+
+void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *tgtdev)
+{
+ struct btrfs_device *next_device;
+
+ WARN_ON(!tgtdev);
+ mutex_lock(&fs_info->fs_devices->device_list_mutex);
+ if (tgtdev->bdev) {
+ btrfs_scratch_superblock(tgtdev);
+ fs_info->fs_devices->open_devices--;
+ }
+ fs_info->fs_devices->num_devices--;
+ if (tgtdev->can_discard)
+ fs_info->fs_devices->num_can_discard++;
+
+ next_device = list_entry(fs_info->fs_devices->devices.next,
+ struct btrfs_device, dev_list);
+ if (tgtdev->bdev == fs_info->sb->s_bdev)
+ fs_info->sb->s_bdev = next_device->bdev;
+ if (tgtdev->bdev == fs_info->fs_devices->latest_bdev)
+ fs_info->fs_devices->latest_bdev = next_device->bdev;
+ list_del_rcu(&tgtdev->dev_list);
+
+ call_rcu(&tgtdev->rcu, free_device);
+
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+}
+
+int btrfs_find_device_by_path(struct btrfs_root *root, char *device_path,
+ struct btrfs_device **device)
+{
+ int ret = 0;
+ struct btrfs_super_block *disk_super;
+ u64 devid;
+ u8 *dev_uuid;
+ struct block_device *bdev;
+ struct buffer_head *bh;
+
+ *device = NULL;
+ ret = btrfs_get_bdev_and_sb(device_path, FMODE_READ,
+ root->fs_info->bdev_holder, 0, &bdev, &bh);
+ if (ret)
+ return ret;
+ disk_super = (struct btrfs_super_block *)bh->b_data;
+ devid = btrfs_stack_device_id(&disk_super->dev_item);
+ dev_uuid = disk_super->dev_item.uuid;
+ *device = btrfs_find_device(root->fs_info, devid, dev_uuid,
+ disk_super->fsid);
+ brelse(bh);
+ if (!*device)
+ ret = -ENOENT;
+ blkdev_put(bdev, FMODE_READ);
+ return ret;
+}
+
+int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
+ char *device_path,
+ struct btrfs_device **device)
+{
+ *device = NULL;
+ if (strcmp(device_path, "missing") == 0) {
+ struct list_head *devices;
+ struct btrfs_device *tmp;
+
+ devices = &root->fs_info->fs_devices->devices;
+ /*
+ * It is safe to read the devices since the volume_mutex
+ * is held by the caller.
+ */
+ list_for_each_entry(tmp, devices, dev_list) {
+ if (tmp->in_fs_metadata && !tmp->bdev) {
+ *device = tmp;
+ break;
+ }
+ }
+
+ if (!*device) {
+ pr_err("btrfs: no missing device found\n");
+ return -ENOENT;
+ }
+
+ return 0;
+ } else {
+ return btrfs_find_device_by_path(root, device_path, device);
+ }
+}
+
/*
* does all the dirty work required for changing file system's UUID.
*/
@@ -1630,7 +1800,8 @@ next_slot:
read_extent_buffer(leaf, fs_uuid,
(unsigned long)btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
- device = btrfs_find_device(root, devid, dev_uuid, fs_uuid);
+ device = btrfs_find_device(root->fs_info, devid, dev_uuid,
+ fs_uuid);
BUG_ON(!device); /* Logic error */
if (device->fs_devices->seeding) {
@@ -1678,16 +1849,17 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
filemap_write_and_wait(bdev->bd_inode->i_mapping);
devices = &root->fs_info->fs_devices->devices;
- /*
- * we have the volume lock, so we don't need the extra
- * device list mutex while reading the list here.
- */
+
+ mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
list_for_each_entry(device, devices, dev_list) {
if (device->bdev == bdev) {
ret = -EEXIST;
+ mutex_unlock(
+ &root->fs_info->fs_devices->device_list_mutex);
goto error;
}
}
+ mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
device = kzalloc(sizeof(*device), GFP_NOFS);
if (!device) {
@@ -1737,6 +1909,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
device->dev_root = root->fs_info->dev_root;
device->bdev = bdev;
device->in_fs_metadata = 1;
+ device->is_tgtdev_for_dev_replace = 0;
device->mode = FMODE_EXCL;
set_blocksize(device->bdev, 4096);
@@ -1844,6 +2017,98 @@ error:
return ret;
}
+int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
+ struct btrfs_device **device_out)
+{
+ struct request_queue *q;
+ struct btrfs_device *device;
+ struct block_device *bdev;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ struct list_head *devices;
+ struct rcu_string *name;
+ int ret = 0;
+
+ *device_out = NULL;
+ if (fs_info->fs_devices->seeding)
+ return -EINVAL;
+
+ bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL,
+ fs_info->bdev_holder);
+ if (IS_ERR(bdev))
+ return PTR_ERR(bdev);
+
+ filemap_write_and_wait(bdev->bd_inode->i_mapping);
+
+ devices = &fs_info->fs_devices->devices;
+ list_for_each_entry(device, devices, dev_list) {
+ if (device->bdev == bdev) {
+ ret = -EEXIST;
+ goto error;
+ }
+ }
+
+ device = kzalloc(sizeof(*device), GFP_NOFS);
+ if (!device) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ name = rcu_string_strdup(device_path, GFP_NOFS);
+ if (!name) {
+ kfree(device);
+ ret = -ENOMEM;
+ goto error;
+ }
+ rcu_assign_pointer(device->name, name);
+
+ q = bdev_get_queue(bdev);
+ if (blk_queue_discard(q))
+ device->can_discard = 1;
+ mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
+ device->writeable = 1;
+ device->work.func = pending_bios_fn;
+ generate_random_uuid(device->uuid);
+ device->devid = BTRFS_DEV_REPLACE_DEVID;
+ spin_lock_init(&device->io_lock);
+ device->generation = 0;
+ device->io_width = root->sectorsize;
+ device->io_align = root->sectorsize;
+ device->sector_size = root->sectorsize;
+ device->total_bytes = i_size_read(bdev->bd_inode);
+ device->disk_total_bytes = device->total_bytes;
+ device->dev_root = fs_info->dev_root;
+ device->bdev = bdev;
+ device->in_fs_metadata = 1;
+ device->is_tgtdev_for_dev_replace = 1;
+ device->mode = FMODE_EXCL;
+ set_blocksize(device->bdev, 4096);
+ device->fs_devices = fs_info->fs_devices;
+ list_add(&device->dev_list, &fs_info->fs_devices->devices);
+ fs_info->fs_devices->num_devices++;
+ fs_info->fs_devices->open_devices++;
+ if (device->can_discard)
+ fs_info->fs_devices->num_can_discard++;
+ mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
+
+ *device_out = device;
+ return ret;
+
+error:
+ blkdev_put(bdev, FMODE_EXCL);
+ return ret;
+}
+
+void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *tgtdev)
+{
+ WARN_ON(fs_info->fs_devices->rw_devices == 0);
+ tgtdev->io_width = fs_info->dev_root->sectorsize;
+ tgtdev->io_align = fs_info->dev_root->sectorsize;
+ tgtdev->sector_size = fs_info->dev_root->sectorsize;
+ tgtdev->dev_root = fs_info->dev_root;
+ tgtdev->in_fs_metadata = 1;
+}
+
static noinline int btrfs_update_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device)
{
@@ -1900,7 +2165,8 @@ static int __btrfs_grow_device(struct btrfs_trans_handle *trans,
if (!device->writeable)
return -EACCES;
- if (new_size <= device->total_bytes)
+ if (new_size <= device->total_bytes ||
+ device->is_tgtdev_for_dev_replace)
return -EINVAL;
btrfs_set_super_total_bytes(super_copy, old_total + diff);
@@ -2338,18 +2604,6 @@ static int chunk_profiles_filter(u64 chunk_type,
return 1;
}
-static u64 div_factor_fine(u64 num, int factor)
-{
- if (factor <= 0)
- return 0;
- if (factor >= 100)
- return num;
-
- num *= factor;
- do_div(num, 100);
- return num;
-}
-
static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
struct btrfs_balance_args *bargs)
{
@@ -2360,7 +2614,14 @@ static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset,
cache = btrfs_lookup_block_group(fs_info, chunk_offset);
chunk_used = btrfs_block_group_used(&cache->item);
- user_thresh = div_factor_fine(cache->key.offset, bargs->usage);
+ if (bargs->usage == 0)
+ user_thresh = 0;
+ else if (bargs->usage > 100)
+ user_thresh = cache->key.offset;
+ else
+ user_thresh = div_factor_fine(cache->key.offset,
+ bargs->usage);
+
if (chunk_used < user_thresh)
ret = 0;
@@ -2514,15 +2775,6 @@ static int should_balance_chunk(struct btrfs_root *root,
return 1;
}
-static u64 div_factor(u64 num, int factor)
-{
- if (factor == 10)
- return num;
- num *= factor;
- do_div(num, 10);
- return num;
-}
-
static int __btrfs_balance(struct btrfs_fs_info *fs_info)
{
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
@@ -2550,7 +2802,8 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
size_to_free = div_factor(old_size, 1);
size_to_free = min(size_to_free, (u64)1 * 1024 * 1024);
if (!device->writeable ||
- device->total_bytes - device->bytes_used > size_to_free)
+ device->total_bytes - device->bytes_used > size_to_free ||
+ device->is_tgtdev_for_dev_replace)
continue;
ret = btrfs_shrink_device(device, old_size - size_to_free);
@@ -2713,6 +2966,8 @@ static void __cancel_balance(struct btrfs_fs_info *fs_info)
unset_balance_control(fs_info);
ret = del_balance_item(fs_info->tree_root);
BUG_ON(ret);
+
+ atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
}
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
@@ -2728,6 +2983,7 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
u64 allowed;
int mixed = 0;
int ret;
+ u64 num_devices;
if (btrfs_fs_closing(fs_info) ||
atomic_read(&fs_info->balance_pause_req) ||
@@ -2756,10 +3012,17 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
}
}
+ num_devices = fs_info->fs_devices->num_devices;
+ btrfs_dev_replace_lock(&fs_info->dev_replace);
+ if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) {
+ BUG_ON(num_devices < 1);
+ num_devices--;
+ }
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
- if (fs_info->fs_devices->num_devices == 1)
+ if (num_devices == 1)
allowed |= BTRFS_BLOCK_GROUP_DUP;
- else if (fs_info->fs_devices->num_devices < 4)
+ else if (num_devices < 4)
allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1);
else
allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
@@ -2884,8 +3147,10 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
out:
if (bctl->flags & BTRFS_BALANCE_RESUME)
__cancel_balance(fs_info);
- else
+ else {
kfree(bctl);
+ atomic_set(&fs_info->mutually_exclusive_operation_running, 0);
+ }
return ret;
}
@@ -2977,6 +3242,8 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
btrfs_balance_sys(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->sys, &disk_bargs);
+ WARN_ON(atomic_xchg(&fs_info->mutually_exclusive_operation_running, 1));
+
mutex_lock(&fs_info->volume_mutex);
mutex_lock(&fs_info->balance_mutex);
@@ -3080,7 +3347,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
u64 old_size = device->total_bytes;
u64 diff = device->total_bytes - new_size;
- if (new_size >= device->total_bytes)
+ if (device->is_tgtdev_for_dev_replace)
return -EINVAL;
path = btrfs_alloc_path();
@@ -3235,6 +3502,14 @@ static int btrfs_cmp_device_info(const void *a, const void *b)
return 0;
}
+struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
+ { 2, 1, 0, 4, 2, 2 /* raid10 */ },
+ { 1, 1, 2, 2, 2, 2 /* raid1 */ },
+ { 1, 2, 1, 1, 1, 2 /* dup */ },
+ { 1, 1, 0, 2, 1, 1 /* raid0 */ },
+ { 1, 1, 1, 1, 1, 1 /* single */ },
+};
+
static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root,
struct map_lookup **map_ret,
@@ -3264,43 +3539,21 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
int ndevs;
int i;
int j;
+ int index;
BUG_ON(!alloc_profile_is_valid(type, 0));
if (list_empty(&fs_devices->alloc_list))
return -ENOSPC;
- sub_stripes = 1;
- dev_stripes = 1;
- devs_increment = 1;
- ncopies = 1;
- devs_max = 0; /* 0 == as many as possible */
- devs_min = 1;
+ index = __get_raid_index(type);
- /*
- * define the properties of each RAID type.
- * FIXME: move this to a global table and use it in all RAID
- * calculation code
- */
- if (type & (BTRFS_BLOCK_GROUP_DUP)) {
- dev_stripes = 2;
- ncopies = 2;
- devs_max = 1;
- } else if (type & (BTRFS_BLOCK_GROUP_RAID0)) {
- devs_min = 2;
- } else if (type & (BTRFS_BLOCK_GROUP_RAID1)) {
- devs_increment = 2;
- ncopies = 2;
- devs_max = 2;
- devs_min = 2;
- } else if (type & (BTRFS_BLOCK_GROUP_RAID10)) {
- sub_stripes = 2;
- devs_increment = 2;
- ncopies = 2;
- devs_min = 4;
- } else {
- devs_max = 1;
- }
+ sub_stripes = btrfs_raid_array[index].sub_stripes;
+ dev_stripes = btrfs_raid_array[index].dev_stripes;
+ devs_max = btrfs_raid_array[index].devs_max;
+ devs_min = btrfs_raid_array[index].devs_min;
+ devs_increment = btrfs_raid_array[index].devs_increment;
+ ncopies = btrfs_raid_array[index].ncopies;
if (type & BTRFS_BLOCK_GROUP_DATA) {
max_stripe_size = 1024 * 1024 * 1024;
@@ -3347,13 +3600,13 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
cur = cur->next;
if (!device->writeable) {
- printk(KERN_ERR
+ WARN(1, KERN_ERR
"btrfs: read-only device in alloc_list\n");
- WARN_ON(1);
continue;
}
- if (!device->in_fs_metadata)
+ if (!device->in_fs_metadata ||
+ device->is_tgtdev_for_dev_replace)
continue;
if (device->total_bytes > device->bytes_used)
@@ -3382,6 +3635,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
devices_info[ndevs].total_avail = total_avail;
devices_info[ndevs].dev = device;
++ndevs;
+ WARN_ON(ndevs > fs_devices->rw_devices);
}
/*
@@ -3740,8 +3994,9 @@ void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree)
}
}
-int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len)
+int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
{
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct extent_map *em;
struct map_lookup *map;
struct extent_map_tree *em_tree = &map_tree->map_tree;
@@ -3761,32 +4016,60 @@ int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len)
else
ret = 1;
free_extent_map(em);
+
+ btrfs_dev_replace_lock(&fs_info->dev_replace);
+ if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))
+ ret++;
+ btrfs_dev_replace_unlock(&fs_info->dev_replace);
+
return ret;
}
-static int find_live_mirror(struct map_lookup *map, int first, int num,
- int optimal)
+static int find_live_mirror(struct btrfs_fs_info *fs_info,
+ struct map_lookup *map, int first, int num,
+ int optimal, int dev_replace_is_ongoing)
{
int i;
- if (map->stripes[optimal].dev->bdev)
- return optimal;
- for (i = first; i < first + num; i++) {
- if (map->stripes[i].dev->bdev)
- return i;
+ int tolerance;
+ struct btrfs_device *srcdev;
+
+ if (dev_replace_is_ongoing &&
+ fs_info->dev_replace.cont_reading_from_srcdev_mode ==
+ BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID)
+ srcdev = fs_info->dev_replace.srcdev;
+ else
+ srcdev = NULL;
+
+ /*
+ * try to avoid the drive that is the source drive for a
+ * dev-replace procedure, only choose it if no other non-missing
+ * mirror is available
+ */
+ for (tolerance = 0; tolerance < 2; tolerance++) {
+ if (map->stripes[optimal].dev->bdev &&
+ (tolerance || map->stripes[optimal].dev != srcdev))
+ return optimal;
+ for (i = first; i < first + num; i++) {
+ if (map->stripes[i].dev->bdev &&
+ (tolerance || map->stripes[i].dev != srcdev))
+ return i;
+ }
}
+
/* we couldn't find one that doesn't fail. Just return something
* and the io error handling code will clean up eventually
*/
return optimal;
}
-static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
+static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret,
int mirror_num)
{
struct extent_map *em;
struct map_lookup *map;
+ struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct extent_map_tree *em_tree = &map_tree->map_tree;
u64 offset;
u64 stripe_offset;
@@ -3800,6 +4083,11 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
int num_stripes;
int max_errors = 0;
struct btrfs_bio *bbio = NULL;
+ struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
+ int dev_replace_is_ongoing = 0;
+ int num_alloc_stripes;
+ int patch_the_first_stripe_for_dev_replace = 0;
+ u64 physical_to_patch_in_first_stripe = 0;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, logical, *length);
@@ -3816,9 +4104,6 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
map = (struct map_lookup *)em->bdev;
offset = logical - em->start;
- if (mirror_num > map->num_stripes)
- mirror_num = 0;
-
stripe_nr = offset;
/*
* stripe_nr counts the total number of stripes we have to stride
@@ -3845,6 +4130,93 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
if (!bbio_ret)
goto out;
+ btrfs_dev_replace_lock(dev_replace);
+ dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace);
+ if (!dev_replace_is_ongoing)
+ btrfs_dev_replace_unlock(dev_replace);
+
+ if (dev_replace_is_ongoing && mirror_num == map->num_stripes + 1 &&
+ !(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) &&
+ dev_replace->tgtdev != NULL) {
+ /*
+ * in dev-replace case, for repair case (that's the only
+ * case where the mirror is selected explicitly when
+ * calling btrfs_map_block), blocks left of the left cursor
+ * can also be read from the target drive.
+ * For REQ_GET_READ_MIRRORS, the target drive is added as
+ * the last one to the array of stripes. For READ, it also
+ * needs to be supported using the same mirror number.
+ * If the requested block is not left of the left cursor,
+ * EIO is returned. This can happen because btrfs_num_copies()
+ * returns one more in the dev-replace case.
+ */
+ u64 tmp_length = *length;
+ struct btrfs_bio *tmp_bbio = NULL;
+ int tmp_num_stripes;
+ u64 srcdev_devid = dev_replace->srcdev->devid;
+ int index_srcdev = 0;
+ int found = 0;
+ u64 physical_of_found = 0;
+
+ ret = __btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS,
+ logical, &tmp_length, &tmp_bbio, 0);
+ if (ret) {
+ WARN_ON(tmp_bbio != NULL);
+ goto out;
+ }
+
+ tmp_num_stripes = tmp_bbio->num_stripes;
+ if (mirror_num > tmp_num_stripes) {
+ /*
+ * REQ_GET_READ_MIRRORS does not contain this
+ * mirror, that means that the requested area
+ * is not left of the left cursor
+ */
+ ret = -EIO;
+ kfree(tmp_bbio);
+ goto out;
+ }
+
+ /*
+ * process the rest of the function using the mirror_num
+ * of the source drive. Therefore look it up first.
+ * At the end, patch the device pointer to the one of the
+ * target drive.
+ */
+ for (i = 0; i < tmp_num_stripes; i++) {
+ if (tmp_bbio->stripes[i].dev->devid == srcdev_devid) {
+ /*
+ * In case of DUP, in order to keep it
+ * simple, only add the mirror with the
+ * lowest physical address
+ */
+ if (found &&
+ physical_of_found <=
+ tmp_bbio->stripes[i].physical)
+ continue;
+ index_srcdev = i;
+ found = 1;
+ physical_of_found =
+ tmp_bbio->stripes[i].physical;
+ }
+ }
+
+ if (found) {
+ mirror_num = index_srcdev + 1;
+ patch_the_first_stripe_for_dev_replace = 1;
+ physical_to_patch_in_first_stripe = physical_of_found;
+ } else {
+ WARN_ON(1);
+ ret = -EIO;
+ kfree(tmp_bbio);
+ goto out;
+ }
+
+ kfree(tmp_bbio);
+ } else if (mirror_num > map->num_stripes) {
+ mirror_num = 0;
+ }
+
num_stripes = 1;
stripe_index = 0;
stripe_nr_orig = stripe_nr;
@@ -3859,19 +4231,20 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
stripe_nr_end - stripe_nr_orig);
stripe_index = do_div(stripe_nr, map->num_stripes);
} else if (map->type & BTRFS_BLOCK_GROUP_RAID1) {
- if (rw & (REQ_WRITE | REQ_DISCARD))
+ if (rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS))
num_stripes = map->num_stripes;
else if (mirror_num)
stripe_index = mirror_num - 1;
else {
- stripe_index = find_live_mirror(map, 0,
+ stripe_index = find_live_mirror(fs_info, map, 0,
map->num_stripes,
- current->pid % map->num_stripes);
+ current->pid % map->num_stripes,
+ dev_replace_is_ongoing);
mirror_num = stripe_index + 1;
}
} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
- if (rw & (REQ_WRITE | REQ_DISCARD)) {
+ if (rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) {
num_stripes = map->num_stripes;
} else if (mirror_num) {
stripe_index = mirror_num - 1;
@@ -3885,7 +4258,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
stripe_index = do_div(stripe_nr, factor);
stripe_index *= map->sub_stripes;
- if (rw & REQ_WRITE)
+ if (rw & (REQ_WRITE | REQ_GET_READ_MIRRORS))
num_stripes = map->sub_stripes;
else if (rw & REQ_DISCARD)
num_stripes = min_t(u64, map->sub_stripes *
@@ -3895,9 +4268,11 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
stripe_index += mirror_num - 1;
else {
int old_stripe_index = stripe_index;
- stripe_index = find_live_mirror(map, stripe_index,
+ stripe_index = find_live_mirror(fs_info, map,
+ stripe_index,
map->sub_stripes, stripe_index +
- current->pid % map->sub_stripes);
+ current->pid % map->sub_stripes,
+ dev_replace_is_ongoing);
mirror_num = stripe_index - old_stripe_index + 1;
}
} else {
@@ -3911,7 +4286,14 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
}
BUG_ON(stripe_index >= map->num_stripes);
- bbio = kzalloc(btrfs_bio_size(num_stripes), GFP_NOFS);
+ num_alloc_stripes = num_stripes;
+ if (dev_replace_is_ongoing) {
+ if (rw & (REQ_WRITE | REQ_DISCARD))
+ num_alloc_stripes <<= 1;
+ if (rw & REQ_GET_READ_MIRRORS)
+ num_alloc_stripes++;
+ }
+ bbio = kzalloc(btrfs_bio_size(num_alloc_stripes), GFP_NOFS);
if (!bbio) {
ret = -ENOMEM;
goto out;
@@ -3998,7 +4380,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
}
}
- if (rw & REQ_WRITE) {
+ if (rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) {
if (map->type & (BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_DUP)) {
@@ -4006,20 +4388,115 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
}
}
+ if (dev_replace_is_ongoing && (rw & (REQ_WRITE | REQ_DISCARD)) &&
+ dev_replace->tgtdev != NULL) {
+ int index_where_to_add;
+ u64 srcdev_devid = dev_replace->srcdev->devid;
+
+ /*
+ * duplicate the write operations while the dev replace
+ * procedure is running. Since the copying of the old disk
+ * to the new disk takes place at run time while the
+ * filesystem is mounted writable, the regular write
+ * operations to the old disk have to be duplicated to go
+ * to the new disk as well.
+ * Note that device->missing is handled by the caller, and
+ * that the write to the old disk is already set up in the
+ * stripes array.
+ */
+ index_where_to_add = num_stripes;
+ for (i = 0; i < num_stripes; i++) {
+ if (bbio->stripes[i].dev->devid == srcdev_devid) {
+ /* write to new disk, too */
+ struct btrfs_bio_stripe *new =
+ bbio->stripes + index_where_to_add;
+ struct btrfs_bio_stripe *old =
+ bbio->stripes + i;
+
+ new->physical = old->physical;
+ new->length = old->length;
+ new->dev = dev_replace->tgtdev;
+ index_where_to_add++;
+ max_errors++;
+ }
+ }
+ num_stripes = index_where_to_add;
+ } else if (dev_replace_is_ongoing && (rw & REQ_GET_READ_MIRRORS) &&
+ dev_replace->tgtdev != NULL) {
+ u64 srcdev_devid = dev_replace->srcdev->devid;
+ int index_srcdev = 0;
+ int found = 0;
+ u64 physical_of_found = 0;
+
+ /*
+ * During the dev-replace procedure, the target drive can
+ * also be used to read data in case it is needed to repair
+ * a corrupt block elsewhere. This is possible if the
+ * requested area is left of the left cursor. In this area,
+ * the target drive is a full copy of the source drive.
+ */
+ for (i = 0; i < num_stripes; i++) {
+ if (bbio->stripes[i].dev->devid == srcdev_devid) {
+ /*
+ * In case of DUP, in order to keep it
+ * simple, only add the mirror with the
+ * lowest physical address
+ */
+ if (found &&
+ physical_of_found <=
+ bbio->stripes[i].physical)
+ continue;
+ index_srcdev = i;
+ found = 1;
+ physical_of_found = bbio->stripes[i].physical;
+ }
+ }
+ if (found) {
+ u64 length = map->stripe_len;
+
+ if (physical_of_found + length <=
+ dev_replace->cursor_left) {
+ struct btrfs_bio_stripe *tgtdev_stripe =
+ bbio->stripes + num_stripes;
+
+ tgtdev_stripe->physical = physical_of_found;
+ tgtdev_stripe->length =
+ bbio->stripes[index_srcdev].length;
+ tgtdev_stripe->dev = dev_replace->tgtdev;
+
+ num_stripes++;
+ }
+ }
+ }
+
*bbio_ret = bbio;
bbio->num_stripes = num_stripes;
bbio->max_errors = max_errors;
bbio->mirror_num = mirror_num;
+
+ /*
+ * this is the case that REQ_READ && dev_replace_is_ongoing &&
+ * mirror_num == num_stripes + 1 && dev_replace target drive is
+ * available as a mirror
+ */
+ if (patch_the_first_stripe_for_dev_replace && num_stripes > 0) {
+ WARN_ON(num_stripes > 1);
+ bbio->stripes[0].dev = dev_replace->tgtdev;
+ bbio->stripes[0].physical = physical_to_patch_in_first_stripe;
+ bbio->mirror_num = map->num_stripes + 1;
+ }
out:
+ if (dev_replace_is_ongoing)
+ btrfs_dev_replace_unlock(dev_replace);
free_extent_map(em);
return ret;
}
-int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
+int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret, int mirror_num)
{
- return __btrfs_map_block(map_tree, rw, logical, length, bbio_ret,
+ return __btrfs_map_block(fs_info, rw, logical, length, bbio_ret,
mirror_num);
}
@@ -4238,10 +4715,116 @@ static noinline void schedule_bio(struct btrfs_root *root,
&device->work);
}
+static int bio_size_ok(struct block_device *bdev, struct bio *bio,
+ sector_t sector)
+{
+ struct bio_vec *prev;
+ struct request_queue *q = bdev_get_queue(bdev);
+ unsigned short max_sectors = queue_max_sectors(q);
+ struct bvec_merge_data bvm = {
+ .bi_bdev = bdev,
+ .bi_sector = sector,
+ .bi_rw = bio->bi_rw,
+ };
+
+ if (bio->bi_vcnt == 0) {
+ WARN_ON(1);
+ return 1;
+ }
+
+ prev = &bio->bi_io_vec[bio->bi_vcnt - 1];
+ if ((bio->bi_size >> 9) > max_sectors)
+ return 0;
+
+ if (!q->merge_bvec_fn)
+ return 1;
+
+ bvm.bi_size = bio->bi_size - prev->bv_len;
+ if (q->merge_bvec_fn(q, &bvm, prev) < prev->bv_len)
+ return 0;
+ return 1;
+}
+
+static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
+ struct bio *bio, u64 physical, int dev_nr,
+ int rw, int async)
+{
+ struct btrfs_device *dev = bbio->stripes[dev_nr].dev;
+
+ bio->bi_private = bbio;
+ bio->bi_private = merge_stripe_index_into_bio_private(
+ bio->bi_private, (unsigned int)dev_nr);
+ bio->bi_end_io = btrfs_end_bio;
+ bio->bi_sector = physical >> 9;
+#ifdef DEBUG
+ {
+ struct rcu_string *name;
+
+ rcu_read_lock();
+ name = rcu_dereference(dev->name);
+ pr_debug("btrfs_map_bio: rw %d, sector=%llu, dev=%lu "
+ "(%s id %llu), size=%u\n", rw,
+ (u64)bio->bi_sector, (u_long)dev->bdev->bd_dev,
+ name->str, dev->devid, bio->bi_size);
+ rcu_read_unlock();
+ }
+#endif
+ bio->bi_bdev = dev->bdev;
+ if (async)
+ schedule_bio(root, dev, rw, bio);
+ else
+ btrfsic_submit_bio(rw, bio);
+}
+
+static int breakup_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
+ struct bio *first_bio, struct btrfs_device *dev,
+ int dev_nr, int rw, int async)
+{
+ struct bio_vec *bvec = first_bio->bi_io_vec;
+ struct bio *bio;
+ int nr_vecs = bio_get_nr_vecs(dev->bdev);
+ u64 physical = bbio->stripes[dev_nr].physical;
+
+again:
+ bio = btrfs_bio_alloc(dev->bdev, physical >> 9, nr_vecs, GFP_NOFS);
+ if (!bio)
+ return -ENOMEM;
+
+ while (bvec <= (first_bio->bi_io_vec + first_bio->bi_vcnt - 1)) {
+ if (bio_add_page(bio, bvec->bv_page, bvec->bv_len,
+ bvec->bv_offset) < bvec->bv_len) {
+ u64 len = bio->bi_size;
+
+ atomic_inc(&bbio->stripes_pending);
+ submit_stripe_bio(root, bbio, bio, physical, dev_nr,
+ rw, async);
+ physical += len;
+ goto again;
+ }
+ bvec++;
+ }
+
+ submit_stripe_bio(root, bbio, bio, physical, dev_nr, rw, async);
+ return 0;
+}
+
+static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
+{
+ atomic_inc(&bbio->error);
+ if (atomic_dec_and_test(&bbio->stripes_pending)) {
+ bio->bi_private = bbio->private;
+ bio->bi_end_io = bbio->end_io;
+ bio->bi_bdev = (struct block_device *)
+ (unsigned long)bbio->mirror_num;
+ bio->bi_sector = logical >> 9;
+ kfree(bbio);
+ bio_endio(bio, -EIO);
+ }
+}
+
int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
int mirror_num, int async_submit)
{
- struct btrfs_mapping_tree *map_tree;
struct btrfs_device *dev;
struct bio *first_bio = bio;
u64 logical = (u64)bio->bi_sector << 9;
@@ -4253,12 +4836,11 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
struct btrfs_bio *bbio = NULL;
length = bio->bi_size;
- map_tree = &root->fs_info->mapping_tree;
map_length = length;
- ret = btrfs_map_block(map_tree, rw, logical, &map_length, &bbio,
+ ret = btrfs_map_block(root->fs_info, rw, logical, &map_length, &bbio,
mirror_num);
- if (ret) /* -ENOMEM */
+ if (ret)
return ret;
total_devs = bbio->num_stripes;
@@ -4276,52 +4858,48 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
atomic_set(&bbio->stripes_pending, bbio->num_stripes);
while (dev_nr < total_devs) {
+ dev = bbio->stripes[dev_nr].dev;
+ if (!dev || !dev->bdev || (rw & WRITE && !dev->writeable)) {
+ bbio_error(bbio, first_bio, logical);
+ dev_nr++;
+ continue;
+ }
+
+ /*
+ * Check and see if we're ok with this bio based on it's size
+ * and offset with the given device.
+ */
+ if (!bio_size_ok(dev->bdev, first_bio,
+ bbio->stripes[dev_nr].physical >> 9)) {
+ ret = breakup_stripe_bio(root, bbio, first_bio, dev,
+ dev_nr, rw, async_submit);
+ BUG_ON(ret);
+ dev_nr++;
+ continue;
+ }
+
if (dev_nr < total_devs - 1) {
bio = bio_clone(first_bio, GFP_NOFS);
BUG_ON(!bio); /* -ENOMEM */
} else {
bio = first_bio;
}
- bio->bi_private = bbio;
- bio->bi_private = merge_stripe_index_into_bio_private(
- bio->bi_private, (unsigned int)dev_nr);
- bio->bi_end_io = btrfs_end_bio;
- bio->bi_sector = bbio->stripes[dev_nr].physical >> 9;
- dev = bbio->stripes[dev_nr].dev;
- if (dev && dev->bdev && (rw != WRITE || dev->writeable)) {
-#ifdef DEBUG
- struct rcu_string *name;
-
- rcu_read_lock();
- name = rcu_dereference(dev->name);
- pr_debug("btrfs_map_bio: rw %d, sector=%llu, dev=%lu "
- "(%s id %llu), size=%u\n", rw,
- (u64)bio->bi_sector, (u_long)dev->bdev->bd_dev,
- name->str, dev->devid, bio->bi_size);
- rcu_read_unlock();
-#endif
- bio->bi_bdev = dev->bdev;
- if (async_submit)
- schedule_bio(root, dev, rw, bio);
- else
- btrfsic_submit_bio(rw, bio);
- } else {
- bio->bi_bdev = root->fs_info->fs_devices->latest_bdev;
- bio->bi_sector = logical >> 9;
- bio_endio(bio, -EIO);
- }
+
+ submit_stripe_bio(root, bbio, bio,
+ bbio->stripes[dev_nr].physical, dev_nr, rw,
+ async_submit);
dev_nr++;
}
return 0;
}
-struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
+struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
u8 *uuid, u8 *fsid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
- cur_devices = root->fs_info->fs_devices;
+ cur_devices = fs_info->fs_devices;
while (cur_devices) {
if (!fsid ||
!memcmp(cur_devices->fsid, fsid, BTRFS_UUID_SIZE)) {
@@ -4402,6 +4980,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
em->bdev = (struct block_device *)map;
em->start = logical;
em->len = length;
+ em->orig_start = 0;
em->block_start = 0;
em->block_len = em->len;
@@ -4419,8 +4998,8 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
read_extent_buffer(leaf, uuid, (unsigned long)
btrfs_stripe_dev_uuid_nr(chunk, i),
BTRFS_UUID_SIZE);
- map->stripes[i].dev = btrfs_find_device(root, devid, uuid,
- NULL);
+ map->stripes[i].dev = btrfs_find_device(root->fs_info, devid,
+ uuid, NULL);
if (!map->stripes[i].dev && !btrfs_test_opt(root, DEGRADED)) {
kfree(map);
free_extent_map(em);
@@ -4461,6 +5040,8 @@ static void fill_device_from_item(struct extent_buffer *leaf,
device->io_align = btrfs_device_io_align(leaf, dev_item);
device->io_width = btrfs_device_io_width(leaf, dev_item);
device->sector_size = btrfs_device_sector_size(leaf, dev_item);
+ WARN_ON(device->devid == BTRFS_DEV_REPLACE_DEVID);
+ device->is_tgtdev_for_dev_replace = 0;
ptr = (unsigned long)btrfs_device_uuid(dev_item);
read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE);
@@ -4538,7 +5119,7 @@ static int read_one_dev(struct btrfs_root *root,
return ret;
}
- device = btrfs_find_device(root, devid, dev_uuid, fs_uuid);
+ device = btrfs_find_device(root->fs_info, devid, dev_uuid, fs_uuid);
if (!device || !device->bdev) {
if (!btrfs_test_opt(root, DEGRADED))
return -EIO;
@@ -4571,7 +5152,7 @@ static int read_one_dev(struct btrfs_root *root,
fill_device_from_item(leaf, dev_item, device);
device->dev_root = root->fs_info->dev_root;
device->in_fs_metadata = 1;
- if (device->writeable) {
+ if (device->writeable && !device->is_tgtdev_for_dev_replace) {
device->fs_devices->total_rw_bytes += device->total_bytes;
spin_lock(&root->fs_info->free_chunk_lock);
root->fs_info->free_chunk_space += device->total_bytes -
@@ -4930,7 +5511,7 @@ int btrfs_get_dev_stats(struct btrfs_root *root,
int i;
mutex_lock(&fs_devices->device_list_mutex);
- dev = btrfs_find_device(root, stats->devid, NULL, NULL);
+ dev = btrfs_find_device(root->fs_info, stats->devid, NULL, NULL);
mutex_unlock(&fs_devices->device_list_mutex);
if (!dev) {
@@ -4958,3 +5539,21 @@ int btrfs_get_dev_stats(struct btrfs_root *root,
stats->nr_items = BTRFS_DEV_STAT_VALUES_MAX;
return 0;
}
+
+int btrfs_scratch_superblock(struct btrfs_device *device)
+{
+ struct buffer_head *bh;
+ struct btrfs_super_block *disk_super;
+
+ bh = btrfs_read_dev_super(device->bdev);
+ if (!bh)
+ return -EINVAL;
+ disk_super = (struct btrfs_super_block *)bh->b_data;
+
+ memset(&disk_super->magic, 0, sizeof(disk_super->magic));
+ set_buffer_dirty(bh);
+ sync_dirty_buffer(bh);
+ brelse(bh);
+
+ return 0;
+}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 53c06af92e8d..d3c3939ac751 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -50,6 +50,7 @@ struct btrfs_device {
int in_fs_metadata;
int missing;
int can_discard;
+ int is_tgtdev_for_dev_replace;
spinlock_t io_lock;
@@ -88,7 +89,7 @@ struct btrfs_device {
u8 uuid[BTRFS_UUID_SIZE];
/* per-device scrub information */
- struct scrub_dev *scrub_device;
+ struct scrub_ctx *scrub_device;
struct btrfs_work work;
struct rcu_head rcu;
@@ -179,6 +180,15 @@ struct btrfs_device_info {
u64 total_avail;
};
+struct btrfs_raid_attr {
+ int sub_stripes; /* sub_stripes info for map */
+ int dev_stripes; /* stripes per dev */
+ int devs_max; /* max devs to use */
+ int devs_min; /* min devs needed */
+ int devs_increment; /* ndevs has to be a multiple of this */
+ int ncopies; /* how many copies to data has */
+};
+
struct map_lookup {
u64 type;
int io_align;
@@ -248,7 +258,7 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 chunk_tree, u64 chunk_objectid,
u64 chunk_offset, u64 start, u64 num_bytes);
-int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
+int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
u64 logical, u64 *length,
struct btrfs_bio **bbio_ret, int mirror_num);
int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
@@ -267,19 +277,27 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
struct btrfs_fs_devices **fs_devices_ret);
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
-void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices);
+void btrfs_close_extra_devices(struct btrfs_fs_info *fs_info,
+ struct btrfs_fs_devices *fs_devices, int step);
+int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
+ char *device_path,
+ struct btrfs_device **device);
+int btrfs_find_device_by_path(struct btrfs_root *root, char *device_path,
+ struct btrfs_device **device);
int btrfs_add_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_device *device);
int btrfs_rm_device(struct btrfs_root *root, char *device_path);
void btrfs_cleanup_fs_uuids(void);
-int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
+int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
int btrfs_grow_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 new_size);
-struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
+struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
u8 *uuid, u8 *fsid);
int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
int btrfs_init_new_device(struct btrfs_root *root, char *path);
+int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
+ struct btrfs_device **device_out);
int btrfs_balance(struct btrfs_balance_control *bctl,
struct btrfs_ioctl_balance_args *bargs);
int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
@@ -296,6 +314,13 @@ int btrfs_get_dev_stats(struct btrfs_root *root,
int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info);
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
+void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *srcdev);
+void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *tgtdev);
+void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
+ struct btrfs_device *tgtdev);
+int btrfs_scratch_superblock(struct btrfs_device *device);
static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
int index)
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 3f4e2d69e83a..446a6848c554 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -122,6 +122,16 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
*/
if (!value)
goto out;
+ } else {
+ di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(inode),
+ name, name_len, 0);
+ if (IS_ERR(di)) {
+ ret = PTR_ERR(di);
+ goto out;
+ }
+ if (!di && !value)
+ goto out;
+ btrfs_release_path(path);
}
again:
@@ -198,6 +208,7 @@ int __btrfs_setxattr(struct btrfs_trans_handle *trans,
inode_inc_iversion(inode);
inode->i_ctime = CURRENT_TIME;
+ set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags);
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
out:
@@ -265,7 +276,7 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
if (verify_dir_item(root, leaf, di))
- continue;
+ goto next;
name_len = btrfs_dir_name_len(leaf, di);
total_size += name_len + 1;
diff --git a/fs/buffer.c b/fs/buffer.c
index b5f044283edb..7a75c3e0fd58 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -46,8 +46,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
#define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
-inline void
-init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
+void init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
{
bh->b_end_io = handler;
bh->b_private = private;
@@ -555,7 +554,7 @@ void emergency_thaw_all(void)
*/
int sync_mapping_buffers(struct address_space *mapping)
{
- struct address_space *buffer_mapping = mapping->assoc_mapping;
+ struct address_space *buffer_mapping = mapping->private_data;
if (buffer_mapping == NULL || list_empty(&mapping->private_list))
return 0;
@@ -588,10 +587,10 @@ void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
struct address_space *buffer_mapping = bh->b_page->mapping;
mark_buffer_dirty(bh);
- if (!mapping->assoc_mapping) {
- mapping->assoc_mapping = buffer_mapping;
+ if (!mapping->private_data) {
+ mapping->private_data = buffer_mapping;
} else {
- BUG_ON(mapping->assoc_mapping != buffer_mapping);
+ BUG_ON(mapping->private_data != buffer_mapping);
}
if (!bh->b_assoc_map) {
spin_lock(&buffer_mapping->private_lock);
@@ -788,7 +787,7 @@ void invalidate_inode_buffers(struct inode *inode)
if (inode_has_buffers(inode)) {
struct address_space *mapping = &inode->i_data;
struct list_head *list = &mapping->private_list;
- struct address_space *buffer_mapping = mapping->assoc_mapping;
+ struct address_space *buffer_mapping = mapping->private_data;
spin_lock(&buffer_mapping->private_lock);
while (!list_empty(list))
@@ -811,7 +810,7 @@ int remove_inode_buffers(struct inode *inode)
if (inode_has_buffers(inode)) {
struct address_space *mapping = &inode->i_data;
struct list_head *list = &mapping->private_list;
- struct address_space *buffer_mapping = mapping->assoc_mapping;
+ struct address_space *buffer_mapping = mapping->private_data;
spin_lock(&buffer_mapping->private_lock);
while (!list_empty(list)) {
@@ -850,13 +849,10 @@ try_again:
if (!bh)
goto no_grow;
- bh->b_bdev = NULL;
bh->b_this_page = head;
bh->b_blocknr = -1;
head = bh;
- bh->b_state = 0;
- atomic_set(&bh->b_count, 0);
bh->b_size = size;
/* Link the buffer to its page */
@@ -911,6 +907,18 @@ link_dev_buffers(struct page *page, struct buffer_head *head)
attach_page_buffers(page, head);
}
+static sector_t blkdev_max_block(struct block_device *bdev, unsigned int size)
+{
+ sector_t retval = ~((sector_t)0);
+ loff_t sz = i_size_read(bdev->bd_inode);
+
+ if (sz) {
+ unsigned int sizebits = blksize_bits(size);
+ retval = (sz >> sizebits);
+ }
+ return retval;
+}
+
/*
* Initialise the state of a blockdev page's buffers.
*/
@@ -921,7 +929,7 @@ init_page_buffers(struct page *page, struct block_device *bdev,
struct buffer_head *head = page_buffers(page);
struct buffer_head *bh = head;
int uptodate = PageUptodate(page);
- sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode));
+ sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode), size);
do {
if (!buffer_mapped(bh)) {
@@ -1553,6 +1561,28 @@ void unmap_underlying_metadata(struct block_device *bdev, sector_t block)
EXPORT_SYMBOL(unmap_underlying_metadata);
/*
+ * Size is a power-of-two in the range 512..PAGE_SIZE,
+ * and the case we care about most is PAGE_SIZE.
+ *
+ * So this *could* possibly be written with those
+ * constraints in mind (relevant mostly if some
+ * architecture has a slow bit-scan instruction)
+ */
+static inline int block_size_bits(unsigned int blocksize)
+{
+ return ilog2(blocksize);
+}
+
+static struct buffer_head *create_page_buffers(struct page *page, struct inode *inode, unsigned int b_state)
+{
+ BUG_ON(!PageLocked(page));
+
+ if (!page_has_buffers(page))
+ create_empty_buffers(page, 1 << ACCESS_ONCE(inode->i_blkbits), b_state);
+ return page_buffers(page);
+}
+
+/*
* NOTE! All mapped/uptodate combinations are valid:
*
* Mapped Uptodate Meaning
@@ -1589,19 +1619,13 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
sector_t block;
sector_t last_block;
struct buffer_head *bh, *head;
- const unsigned blocksize = 1 << inode->i_blkbits;
+ unsigned int blocksize, bbits;
int nr_underway = 0;
int write_op = (wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC : WRITE);
- BUG_ON(!PageLocked(page));
-
- last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
-
- if (!page_has_buffers(page)) {
- create_empty_buffers(page, blocksize,
+ head = create_page_buffers(page, inode,
(1 << BH_Dirty)|(1 << BH_Uptodate));
- }
/*
* Be very careful. We have no exclusion from __set_page_dirty_buffers
@@ -1613,9 +1637,12 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
* handle that here by just cleaning them.
*/
- block = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
- head = page_buffers(page);
bh = head;
+ blocksize = bh->b_size;
+ bbits = block_size_bits(blocksize);
+
+ block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
+ last_block = (i_size_read(inode) - 1) >> bbits;
/*
* Get all the dirty buffers mapped to disk addresses and
@@ -1806,12 +1833,10 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len,
BUG_ON(to > PAGE_CACHE_SIZE);
BUG_ON(from > to);
- blocksize = 1 << inode->i_blkbits;
- if (!page_has_buffers(page))
- create_empty_buffers(page, blocksize, 0);
- head = page_buffers(page);
+ head = create_page_buffers(page, inode, 0);
+ blocksize = head->b_size;
+ bbits = block_size_bits(blocksize);
- bbits = inode->i_blkbits;
block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
for(bh = head, block_start = 0; bh != head || !block_start;
@@ -1881,11 +1906,11 @@ static int __block_commit_write(struct inode *inode, struct page *page,
unsigned blocksize;
struct buffer_head *bh, *head;
- blocksize = 1 << inode->i_blkbits;
+ bh = head = page_buffers(page);
+ blocksize = bh->b_size;
- for(bh = head = page_buffers(page), block_start = 0;
- bh != head || !block_start;
- block_start=block_end, bh = bh->b_this_page) {
+ block_start = 0;
+ do {
block_end = block_start + blocksize;
if (block_end <= from || block_start >= to) {
if (!buffer_uptodate(bh))
@@ -1895,7 +1920,10 @@ static int __block_commit_write(struct inode *inode, struct page *page,
mark_buffer_dirty(bh);
}
clear_buffer_new(bh);
- }
+
+ block_start = block_end;
+ bh = bh->b_this_page;
+ } while (bh != head);
/*
* If this is a partial write which happened to make all buffers
@@ -2020,7 +2048,6 @@ EXPORT_SYMBOL(generic_write_end);
int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
unsigned long from)
{
- struct inode *inode = page->mapping->host;
unsigned block_start, block_end, blocksize;
unsigned to;
struct buffer_head *bh, *head;
@@ -2029,13 +2056,13 @@ int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
if (!page_has_buffers(page))
return 0;
- blocksize = 1 << inode->i_blkbits;
+ head = page_buffers(page);
+ blocksize = head->b_size;
to = min_t(unsigned, PAGE_CACHE_SIZE - from, desc->count);
to = from + to;
if (from < blocksize && to > PAGE_CACHE_SIZE - blocksize)
return 0;
- head = page_buffers(page);
bh = head;
block_start = 0;
do {
@@ -2068,18 +2095,16 @@ int block_read_full_page(struct page *page, get_block_t *get_block)
struct inode *inode = page->mapping->host;
sector_t iblock, lblock;
struct buffer_head *bh, *head, *arr[MAX_BUF_PER_PAGE];
- unsigned int blocksize;
+ unsigned int blocksize, bbits;
int nr, i;
int fully_mapped = 1;
- BUG_ON(!PageLocked(page));
- blocksize = 1 << inode->i_blkbits;
- if (!page_has_buffers(page))
- create_empty_buffers(page, blocksize, 0);
- head = page_buffers(page);
+ head = create_page_buffers(page, inode, 0);
+ blocksize = head->b_size;
+ bbits = block_size_bits(blocksize);
- iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
- lblock = (i_size_read(inode)+blocksize-1) >> inode->i_blkbits;
+ iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
+ lblock = (i_size_read(inode)+blocksize-1) >> bbits;
bh = head;
nr = 0;
i = 0;
@@ -2864,6 +2889,56 @@ static void end_bio_bh_io_sync(struct bio *bio, int err)
bio_put(bio);
}
+/*
+ * This allows us to do IO even on the odd last sectors
+ * of a device, even if the bh block size is some multiple
+ * of the physical sector size.
+ *
+ * We'll just truncate the bio to the size of the device,
+ * and clear the end of the buffer head manually.
+ *
+ * Truly out-of-range accesses will turn into actual IO
+ * errors, this only handles the "we need to be able to
+ * do IO at the final sector" case.
+ */
+static void guard_bh_eod(int rw, struct bio *bio, struct buffer_head *bh)
+{
+ sector_t maxsector;
+ unsigned bytes;
+
+ maxsector = i_size_read(bio->bi_bdev->bd_inode) >> 9;
+ if (!maxsector)
+ return;
+
+ /*
+ * If the *whole* IO is past the end of the device,
+ * let it through, and the IO layer will turn it into
+ * an EIO.
+ */
+ if (unlikely(bio->bi_sector >= maxsector))
+ return;
+
+ maxsector -= bio->bi_sector;
+ bytes = bio->bi_size;
+ if (likely((bytes >> 9) <= maxsector))
+ return;
+
+ /* Uhhuh. We've got a bh that straddles the device size! */
+ bytes = maxsector << 9;
+
+ /* Truncate the bio.. */
+ bio->bi_size = bytes;
+ bio->bi_io_vec[0].bv_len = bytes;
+
+ /* ..and clear the end of the buffer for reads */
+ if ((rw & RW_MASK) == READ) {
+ void *kaddr = kmap_atomic(bh->b_page);
+ memset(kaddr + bh_offset(bh) + bytes, 0, bh->b_size - bytes);
+ kunmap_atomic(kaddr);
+ flush_dcache_page(bh->b_page);
+ }
+}
+
int submit_bh(int rw, struct buffer_head * bh)
{
struct bio *bio;
@@ -2900,6 +2975,9 @@ int submit_bh(int rw, struct buffer_head * bh)
bio->bi_end_io = end_bio_bh_io_sync;
bio->bi_private = bh;
+ /* Take care of bh's that straddle the end of the device */
+ guard_bh_eod(rw, bio, bh);
+
bio_get(bio);
submit_bio(rw, bio);
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index 67bef6d01484..746ce532e130 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -41,12 +41,12 @@ static struct fscache_object *cachefiles_alloc_object(
_enter("{%s},%p,", cache->cache.identifier, cookie);
- lookup_data = kmalloc(sizeof(*lookup_data), GFP_KERNEL);
+ lookup_data = kmalloc(sizeof(*lookup_data), cachefiles_gfp);
if (!lookup_data)
goto nomem_lookup_data;
/* create a new object record and a temporary leaf image */
- object = kmem_cache_alloc(cachefiles_object_jar, GFP_KERNEL);
+ object = kmem_cache_alloc(cachefiles_object_jar, cachefiles_gfp);
if (!object)
goto nomem_object;
@@ -63,7 +63,7 @@ static struct fscache_object *cachefiles_alloc_object(
* - stick the length on the front and leave space on the back for the
* encoder
*/
- buffer = kmalloc((2 + 512) + 3, GFP_KERNEL);
+ buffer = kmalloc((2 + 512) + 3, cachefiles_gfp);
if (!buffer)
goto nomem_buffer;
@@ -219,7 +219,7 @@ static void cachefiles_update_object(struct fscache_object *_object)
return;
}
- auxdata = kmalloc(2 + 512 + 3, GFP_KERNEL);
+ auxdata = kmalloc(2 + 512 + 3, cachefiles_gfp);
if (!auxdata) {
_leave(" [nomem]");
return;
@@ -441,6 +441,54 @@ truncate_failed:
}
/*
+ * Invalidate an object
+ */
+static void cachefiles_invalidate_object(struct fscache_operation *op)
+{
+ struct cachefiles_object *object;
+ struct cachefiles_cache *cache;
+ const struct cred *saved_cred;
+ struct path path;
+ uint64_t ni_size;
+ int ret;
+
+ object = container_of(op->object, struct cachefiles_object, fscache);
+ cache = container_of(object->fscache.cache,
+ struct cachefiles_cache, cache);
+
+ op->object->cookie->def->get_attr(op->object->cookie->netfs_data,
+ &ni_size);
+
+ _enter("{OBJ%x},[%llu]",
+ op->object->debug_id, (unsigned long long)ni_size);
+
+ if (object->backer) {
+ ASSERT(S_ISREG(object->backer->d_inode->i_mode));
+
+ fscache_set_store_limit(&object->fscache, ni_size);
+
+ path.dentry = object->backer;
+ path.mnt = cache->mnt;
+
+ cachefiles_begin_secure(cache, &saved_cred);
+ ret = vfs_truncate(&path, 0);
+ if (ret == 0)
+ ret = vfs_truncate(&path, ni_size);
+ cachefiles_end_secure(cache, saved_cred);
+
+ if (ret != 0) {
+ fscache_set_store_limit(&object->fscache, 0);
+ if (ret == -EIO)
+ cachefiles_io_error_obj(object,
+ "Invalidate failed");
+ }
+ }
+
+ fscache_op_complete(op, true);
+ _leave("");
+}
+
+/*
* dissociate a cache from all the pages it was backing
*/
static void cachefiles_dissociate_pages(struct fscache_cache *cache)
@@ -455,6 +503,7 @@ const struct fscache_cache_ops cachefiles_cache_ops = {
.lookup_complete = cachefiles_lookup_complete,
.grab_object = cachefiles_grab_object,
.update_object = cachefiles_update_object,
+ .invalidate_object = cachefiles_invalidate_object,
.drop_object = cachefiles_drop_object,
.put_object = cachefiles_put_object,
.sync_cache = cachefiles_sync_cache,
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index bd6bc1bde2d7..49382519907a 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -23,6 +23,8 @@ extern unsigned cachefiles_debug;
#define CACHEFILES_DEBUG_KLEAVE 2
#define CACHEFILES_DEBUG_KDEBUG 4
+#define cachefiles_gfp (__GFP_WAIT | __GFP_NORETRY | __GFP_NOMEMALLOC)
+
/*
* node records
*/
diff --git a/fs/cachefiles/key.c b/fs/cachefiles/key.c
index 81b8b2b3a674..33b58c60f2d1 100644
--- a/fs/cachefiles/key.c
+++ b/fs/cachefiles/key.c
@@ -78,7 +78,7 @@ char *cachefiles_cook_key(const u8 *raw, int keylen, uint8_t type)
_debug("max: %d", max);
- key = kmalloc(max, GFP_KERNEL);
+ key = kmalloc(max, cachefiles_gfp);
if (!key)
return NULL;
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index b0b5f7cdfffa..8c01c5fcdf75 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -40,8 +40,7 @@ void __cachefiles_printk_object(struct cachefiles_object *object,
printk(KERN_ERR "%sobjstate=%s fl=%lx wbusy=%x ev=%lx[%lx]\n",
prefix, fscache_object_states[object->fscache.state],
object->fscache.flags, work_busy(&object->fscache.work),
- object->fscache.events,
- object->fscache.event_mask & FSCACHE_OBJECT_EVENTS_MASK);
+ object->fscache.events, object->fscache.event_mask);
printk(KERN_ERR "%sops=%u inp=%u exc=%u\n",
prefix, object->fscache.n_ops, object->fscache.n_in_progress,
object->fscache.n_exclusive);
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index c994691d9445..480992259707 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -77,25 +77,25 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
struct page *backpage = monitor->back_page, *backpage2;
int ret;
- kenter("{ino=%lx},{%lx,%lx}",
+ _enter("{ino=%lx},{%lx,%lx}",
object->backer->d_inode->i_ino,
backpage->index, backpage->flags);
/* skip if the page was truncated away completely */
if (backpage->mapping != bmapping) {
- kleave(" = -ENODATA [mapping]");
+ _leave(" = -ENODATA [mapping]");
return -ENODATA;
}
backpage2 = find_get_page(bmapping, backpage->index);
if (!backpage2) {
- kleave(" = -ENODATA [gone]");
+ _leave(" = -ENODATA [gone]");
return -ENODATA;
}
if (backpage != backpage2) {
put_page(backpage2);
- kleave(" = -ENODATA [different]");
+ _leave(" = -ENODATA [different]");
return -ENODATA;
}
@@ -114,7 +114,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
if (PageUptodate(backpage))
goto unlock_discard;
- kdebug("reissue read");
+ _debug("reissue read");
ret = bmapping->a_ops->readpage(NULL, backpage);
if (ret < 0)
goto unlock_discard;
@@ -129,7 +129,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object,
}
/* it'll reappear on the todo list */
- kleave(" = -EINPROGRESS");
+ _leave(" = -EINPROGRESS");
return -EINPROGRESS;
unlock_discard:
@@ -137,7 +137,7 @@ unlock_discard:
spin_lock_irq(&object->work_lock);
list_del(&monitor->op_link);
spin_unlock_irq(&object->work_lock);
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ret;
}
@@ -174,11 +174,13 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
_debug("- copy {%lu}", monitor->back_page->index);
recheck:
- if (PageUptodate(monitor->back_page)) {
+ if (test_bit(FSCACHE_COOKIE_INVALIDATING,
+ &object->fscache.cookie->flags)) {
+ error = -ESTALE;
+ } else if (PageUptodate(monitor->back_page)) {
copy_highpage(monitor->netfs_page, monitor->back_page);
-
- pagevec_add(&pagevec, monitor->netfs_page);
- fscache_mark_pages_cached(monitor->op, &pagevec);
+ fscache_mark_page_cached(monitor->op,
+ monitor->netfs_page);
error = 0;
} else if (!PageError(monitor->back_page)) {
/* the page has probably been truncated */
@@ -198,6 +200,7 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
fscache_end_io(op, monitor->netfs_page, error);
page_cache_release(monitor->netfs_page);
+ fscache_retrieval_complete(op, 1);
fscache_put_retrieval(op);
kfree(monitor);
@@ -239,7 +242,7 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
_debug("read back %p{%lu,%d}",
netpage, netpage->index, page_count(netpage));
- monitor = kzalloc(sizeof(*monitor), GFP_KERNEL);
+ monitor = kzalloc(sizeof(*monitor), cachefiles_gfp);
if (!monitor)
goto nomem;
@@ -258,13 +261,14 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = page_cache_alloc_cold(bmapping);
+ newpage = __page_cache_alloc(cachefiles_gfp |
+ __GFP_COLD);
if (!newpage)
goto nomem_monitor;
}
ret = add_to_page_cache(newpage, bmapping,
- netpage->index, GFP_KERNEL);
+ netpage->index, cachefiles_gfp);
if (ret == 0)
goto installed_new_backing_page;
if (ret != -EEXIST)
@@ -335,11 +339,11 @@ backing_page_already_present:
backing_page_already_uptodate:
_debug("- uptodate");
- pagevec_add(pagevec, netpage);
- fscache_mark_pages_cached(op, pagevec);
+ fscache_mark_page_cached(op, netpage);
copy_highpage(netpage, backpage);
fscache_end_io(op, netpage, 0);
+ fscache_retrieval_complete(op, 1);
success:
_debug("success");
@@ -357,10 +361,13 @@ out:
read_error:
_debug("read error %d", ret);
- if (ret == -ENOMEM)
+ if (ret == -ENOMEM) {
+ fscache_retrieval_complete(op, 1);
goto out;
+ }
io_error:
cachefiles_io_error_obj(object, "Page read error on backing file");
+ fscache_retrieval_complete(op, 1);
ret = -ENOBUFS;
goto out;
@@ -370,6 +377,7 @@ nomem_monitor:
fscache_put_retrieval(monitor->op);
kfree(monitor);
nomem:
+ fscache_retrieval_complete(op, 1);
_leave(" = -ENOMEM");
return -ENOMEM;
}
@@ -408,7 +416,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
_enter("{%p},{%lx},,,", object, page->index);
if (!object->backer)
- return -ENOBUFS;
+ goto enobufs;
inode = object->backer->d_inode;
ASSERT(S_ISREG(inode->i_mode));
@@ -417,7 +425,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
/* calculate the shift required to use bmap */
if (inode->i_sb->s_blocksize > PAGE_SIZE)
- return -ENOBUFS;
+ goto enobufs;
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
@@ -448,15 +456,20 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
&pagevec);
} else if (cachefiles_has_space(cache, 0, 1) == 0) {
/* there's space in the cache we can use */
- pagevec_add(&pagevec, page);
- fscache_mark_pages_cached(op, &pagevec);
+ fscache_mark_page_cached(op, page);
+ fscache_retrieval_complete(op, 1);
ret = -ENODATA;
} else {
- ret = -ENOBUFS;
+ goto enobufs;
}
_leave(" = %d", ret);
return ret;
+
+enobufs:
+ fscache_retrieval_complete(op, 1);
+ _leave(" = -ENOBUFS");
+ return -ENOBUFS;
}
/*
@@ -465,8 +478,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
*/
static int cachefiles_read_backing_file(struct cachefiles_object *object,
struct fscache_retrieval *op,
- struct list_head *list,
- struct pagevec *mark_pvec)
+ struct list_head *list)
{
struct cachefiles_one_read *monitor = NULL;
struct address_space *bmapping = object->backer->d_inode->i_mapping;
@@ -485,7 +497,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
netpage, netpage->index, page_count(netpage));
if (!monitor) {
- monitor = kzalloc(sizeof(*monitor), GFP_KERNEL);
+ monitor = kzalloc(sizeof(*monitor), cachefiles_gfp);
if (!monitor)
goto nomem;
@@ -500,13 +512,14 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = page_cache_alloc_cold(bmapping);
+ newpage = __page_cache_alloc(cachefiles_gfp |
+ __GFP_COLD);
if (!newpage)
goto nomem;
}
ret = add_to_page_cache(newpage, bmapping,
- netpage->index, GFP_KERNEL);
+ netpage->index, cachefiles_gfp);
if (ret == 0)
goto installed_new_backing_page;
if (ret != -EEXIST)
@@ -536,10 +549,11 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
_debug("- monitor add");
ret = add_to_page_cache(netpage, op->mapping, netpage->index,
- GFP_KERNEL);
+ cachefiles_gfp);
if (ret < 0) {
if (ret == -EEXIST) {
page_cache_release(netpage);
+ fscache_retrieval_complete(op, 1);
continue;
}
goto nomem;
@@ -612,10 +626,11 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
_debug("- uptodate");
ret = add_to_page_cache(netpage, op->mapping, netpage->index,
- GFP_KERNEL);
+ cachefiles_gfp);
if (ret < 0) {
if (ret == -EEXIST) {
page_cache_release(netpage);
+ fscache_retrieval_complete(op, 1);
continue;
}
goto nomem;
@@ -626,16 +641,17 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
page_cache_release(backpage);
backpage = NULL;
- if (!pagevec_add(mark_pvec, netpage))
- fscache_mark_pages_cached(op, mark_pvec);
+ fscache_mark_page_cached(op, netpage);
page_cache_get(netpage);
if (!pagevec_add(&lru_pvec, netpage))
__pagevec_lru_add_file(&lru_pvec);
+ /* the netpage is unlocked and marked up to date here */
fscache_end_io(op, netpage, 0);
page_cache_release(netpage);
netpage = NULL;
+ fscache_retrieval_complete(op, 1);
continue;
}
@@ -661,6 +677,7 @@ out:
list_for_each_entry_safe(netpage, _n, list, lru) {
list_del(&netpage->lru);
page_cache_release(netpage);
+ fscache_retrieval_complete(op, 1);
}
_leave(" = %d", ret);
@@ -669,15 +686,17 @@ out:
nomem:
_debug("nomem");
ret = -ENOMEM;
- goto out;
+ goto record_page_complete;
read_error:
_debug("read error %d", ret);
if (ret == -ENOMEM)
- goto out;
+ goto record_page_complete;
io_error:
cachefiles_io_error_obj(object, "Page read error on backing file");
ret = -ENOBUFS;
+record_page_complete:
+ fscache_retrieval_complete(op, 1);
goto out;
}
@@ -709,7 +728,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
*nr_pages);
if (!object->backer)
- return -ENOBUFS;
+ goto all_enobufs;
space = 1;
if (cachefiles_has_space(cache, 0, *nr_pages) < 0)
@@ -722,7 +741,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
/* calculate the shift required to use bmap */
if (inode->i_sb->s_blocksize > PAGE_SIZE)
- return -ENOBUFS;
+ goto all_enobufs;
shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits;
@@ -762,7 +781,10 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
nrbackpages++;
} else if (space && pagevec_add(&pagevec, page) == 0) {
fscache_mark_pages_cached(op, &pagevec);
+ fscache_retrieval_complete(op, 1);
ret = -ENODATA;
+ } else {
+ fscache_retrieval_complete(op, 1);
}
}
@@ -775,18 +797,18 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op,
/* submit the apparently valid pages to the backing fs to be read from
* disk */
if (nrbackpages > 0) {
- ret2 = cachefiles_read_backing_file(object, op, &backpages,
- &pagevec);
+ ret2 = cachefiles_read_backing_file(object, op, &backpages);
if (ret2 == -ENOMEM || ret2 == -EINTR)
ret = ret2;
}
- if (pagevec_count(&pagevec) > 0)
- fscache_mark_pages_cached(op, &pagevec);
-
_leave(" = %d [nr=%u%s]",
ret, *nr_pages, list_empty(pages) ? " empty" : "");
return ret;
+
+all_enobufs:
+ fscache_retrieval_complete(op, *nr_pages);
+ return -ENOBUFS;
}
/*
@@ -806,7 +828,6 @@ int cachefiles_allocate_page(struct fscache_retrieval *op,
{
struct cachefiles_object *object;
struct cachefiles_cache *cache;
- struct pagevec pagevec;
int ret;
object = container_of(op->op.object,
@@ -817,14 +838,12 @@ int cachefiles_allocate_page(struct fscache_retrieval *op,
_enter("%p,{%lx},", object, page->index);
ret = cachefiles_has_space(cache, 0, 1);
- if (ret == 0) {
- pagevec_init(&pagevec, 0);
- pagevec_add(&pagevec, page);
- fscache_mark_pages_cached(op, &pagevec);
- } else {
+ if (ret == 0)
+ fscache_mark_page_cached(op, page);
+ else
ret = -ENOBUFS;
- }
+ fscache_retrieval_complete(op, 1);
_leave(" = %d", ret);
return ret;
}
@@ -874,6 +893,7 @@ int cachefiles_allocate_pages(struct fscache_retrieval *op,
ret = -ENOBUFS;
}
+ fscache_retrieval_complete(op, *nr_pages);
_leave(" = %d", ret);
return ret;
}
diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c
index e18b183b47e1..73b46288b54b 100644
--- a/fs/cachefiles/xattr.c
+++ b/fs/cachefiles/xattr.c
@@ -174,7 +174,7 @@ int cachefiles_check_object_xattr(struct cachefiles_object *object,
ASSERT(dentry);
ASSERT(dentry->d_inode);
- auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL);
+ auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, cachefiles_gfp);
if (!auxbuf) {
_leave(" = -ENOMEM");
return -ENOMEM;
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 6690269f5dde..064d1a68d2c1 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -267,6 +267,14 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg)
kfree(req->r_pages);
}
+static void ceph_unlock_page_vector(struct page **pages, int num_pages)
+{
+ int i;
+
+ for (i = 0; i < num_pages; i++)
+ unlock_page(pages[i]);
+}
+
/*
* start an async read(ahead) operation. return nr_pages we submitted
* a read for on success, or negative error code.
@@ -347,6 +355,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
return nr_pages;
out_pages:
+ ceph_unlock_page_vector(pages, nr_pages);
ceph_release_page_vector(pages, nr_pages);
out:
ceph_osdc_put_request(req);
@@ -1078,23 +1087,51 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping,
struct page **pagep, void **fsdata)
{
struct inode *inode = file->f_dentry->d_inode;
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ struct ceph_file_info *fi = file->private_data;
struct page *page;
pgoff_t index = pos >> PAGE_CACHE_SHIFT;
- int r;
+ int r, want, got = 0;
+
+ if (fi->fmode & CEPH_FILE_MODE_LAZY)
+ want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
+ else
+ want = CEPH_CAP_FILE_BUFFER;
+
+ dout("write_begin %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
+ inode, ceph_vinop(inode), pos, len, inode->i_size);
+ r = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, pos+len);
+ if (r < 0)
+ return r;
+ dout("write_begin %p %llx.%llx %llu~%u got cap refs on %s\n",
+ inode, ceph_vinop(inode), pos, len, ceph_cap_string(got));
+ if (!(got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO))) {
+ ceph_put_cap_refs(ci, got);
+ return -EAGAIN;
+ }
do {
/* get a page */
page = grab_cache_page_write_begin(mapping, index, 0);
- if (!page)
- return -ENOMEM;
- *pagep = page;
+ if (!page) {
+ r = -ENOMEM;
+ break;
+ }
dout("write_begin file %p inode %p page %p %d~%d\n", file,
inode, page, (int)pos, (int)len);
r = ceph_update_writeable_page(file, pos, len, page);
+ if (r)
+ page_cache_release(page);
} while (r == -EAGAIN);
+ if (r) {
+ ceph_put_cap_refs(ci, got);
+ } else {
+ *pagep = page;
+ *(int *)fsdata = got;
+ }
return r;
}
@@ -1108,10 +1145,12 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
struct page *page, void *fsdata)
{
struct inode *inode = file->f_dentry->d_inode;
+ struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_mds_client *mdsc = fsc->mdsc;
unsigned from = pos & (PAGE_CACHE_SIZE - 1);
int check_cap = 0;
+ int got = (unsigned long)fsdata;
dout("write_end file %p inode %p page %p %d~%d (%d)\n", file,
inode, page, (int)pos, (int)copied, (int)len);
@@ -1134,6 +1173,19 @@ static int ceph_write_end(struct file *file, struct address_space *mapping,
up_read(&mdsc->snap_rwsem);
page_cache_release(page);
+ if (copied > 0) {
+ int dirty;
+ spin_lock(&ci->i_ceph_lock);
+ dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
+ spin_unlock(&ci->i_ceph_lock);
+ if (dirty)
+ __mark_inode_dirty(inode, dirty);
+ }
+
+ dout("write_end %p %llx.%llx %llu~%u dropping cap refs on %s\n",
+ inode, ceph_vinop(inode), pos, len, ceph_cap_string(got));
+ ceph_put_cap_refs(ci, got);
+
if (check_cap)
ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL);
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 3251e9cc6401..a1d9bb30c1bf 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -236,8 +236,10 @@ static struct ceph_cap *get_cap(struct ceph_mds_client *mdsc,
if (!ctx) {
cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS);
if (cap) {
+ spin_lock(&mdsc->caps_list_lock);
mdsc->caps_use_count++;
mdsc->caps_total_count++;
+ spin_unlock(&mdsc->caps_list_lock);
}
return cap;
}
@@ -1349,11 +1351,15 @@ int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask)
if (!ci->i_head_snapc)
ci->i_head_snapc = ceph_get_snap_context(
ci->i_snap_realm->cached_context);
- dout(" inode %p now dirty snapc %p\n", &ci->vfs_inode,
- ci->i_head_snapc);
+ dout(" inode %p now dirty snapc %p auth cap %p\n",
+ &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap);
BUG_ON(!list_empty(&ci->i_dirty_item));
spin_lock(&mdsc->cap_dirty_lock);
- list_add(&ci->i_dirty_item, &mdsc->cap_dirty);
+ if (ci->i_auth_cap)
+ list_add(&ci->i_dirty_item, &mdsc->cap_dirty);
+ else
+ list_add(&ci->i_dirty_item,
+ &mdsc->cap_dirty_migrating);
spin_unlock(&mdsc->cap_dirty_lock);
if (ci->i_flushing_caps == 0) {
ihold(inode);
@@ -2388,7 +2394,7 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant,
&atime);
/* max size increase? */
- if (max_size != ci->i_max_size) {
+ if (ci->i_auth_cap == cap && max_size != ci->i_max_size) {
dout("max_size %lld -> %llu\n", ci->i_max_size, max_size);
ci->i_max_size = max_size;
if (max_size >= ci->i_wanted_max_size) {
@@ -2745,6 +2751,7 @@ static void handle_cap_import(struct ceph_mds_client *mdsc,
/* make sure we re-request max_size, if necessary */
spin_lock(&ci->i_ceph_lock);
+ ci->i_wanted_max_size = 0; /* reset */
ci->i_requested_max_size = 0;
spin_unlock(&ci->i_ceph_lock);
}
@@ -2840,8 +2847,6 @@ void ceph_handle_caps(struct ceph_mds_session *session,
case CEPH_CAP_OP_IMPORT:
handle_cap_import(mdsc, inode, h, session,
snaptrace, snaptrace_len);
- ceph_check_caps(ceph_inode(inode), 0, session);
- goto done_unlocked;
}
/* the rest require a cap */
@@ -2858,6 +2863,7 @@ void ceph_handle_caps(struct ceph_mds_session *session,
switch (op) {
case CEPH_CAP_OP_REVOKE:
case CEPH_CAP_OP_GRANT:
+ case CEPH_CAP_OP_IMPORT:
handle_cap_grant(inode, h, session, cap, msg->middle);
goto done_unlocked;
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index e5b77319c97b..8c1aabe93b67 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -454,7 +454,7 @@ static void reset_readdir(struct ceph_file_info *fi)
fi->flags &= ~CEPH_F_ATEND;
}
-static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin)
+static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence)
{
struct ceph_file_info *fi = file->private_data;
struct inode *inode = file->f_mapping->host;
@@ -463,7 +463,7 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin)
mutex_lock(&inode->i_mutex);
retval = -EINVAL;
- switch (origin) {
+ switch (whence) {
case SEEK_END:
offset += inode->i_size + 2; /* FIXME */
break;
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 02ce90972d81..ca3ab3f9ca70 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -56,13 +56,15 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
struct ceph_nfs_confh *cfh = (void *)rawfh;
int connected_handle_length = sizeof(*cfh)/4;
int handle_length = sizeof(*fh)/4;
- struct dentry *dentry = d_find_alias(inode);
+ struct dentry *dentry;
struct dentry *parent;
/* don't re-export snaps */
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EINVAL;
+ dentry = d_find_alias(inode);
+
/* if we found an alias, generate a connectable fh */
if (*max_len >= connected_handle_length && dentry) {
dout("encode_fh %p connectable\n", dentry);
@@ -90,6 +92,8 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
*max_len = handle_length;
type = 255;
}
+ if (dentry)
+ dput(dentry);
return type;
}
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 5840d2aaed15..e51558fca3a3 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -712,63 +712,53 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
struct ceph_osd_client *osdc =
&ceph_sb_to_client(inode->i_sb)->client->osdc;
loff_t endoff = pos + iov->iov_len;
- int want, got = 0;
- int ret, err;
+ int got = 0;
+ int ret, err, written;
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EROFS;
retry_snap:
+ written = 0;
if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
return -ENOSPC;
__ceph_do_pending_vmtruncate(inode);
- dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
- inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
- inode->i_size);
- if (fi->fmode & CEPH_FILE_MODE_LAZY)
- want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
- else
- want = CEPH_CAP_FILE_BUFFER;
- ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff);
- if (ret < 0)
- goto out_put;
-
- dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n",
- inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
- ceph_cap_string(got));
-
- if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
- (iocb->ki_filp->f_flags & O_DIRECT) ||
- (inode->i_sb->s_flags & MS_SYNCHRONOUS) ||
- (fi->flags & CEPH_F_SYNC)) {
- ret = ceph_sync_write(file, iov->iov_base, iov->iov_len,
- &iocb->ki_pos);
- } else {
- /*
- * buffered write; drop Fw early to avoid slow
- * revocation if we get stuck on balance_dirty_pages
- */
- int dirty;
-
- spin_lock(&ci->i_ceph_lock);
- dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
- spin_unlock(&ci->i_ceph_lock);
- ceph_put_cap_refs(ci, got);
+ /*
+ * try to do a buffered write. if we don't have sufficient
+ * caps, we'll get -EAGAIN from generic_file_aio_write, or a
+ * short write if we only get caps for some pages.
+ */
+ if (!(iocb->ki_filp->f_flags & O_DIRECT) &&
+ !(inode->i_sb->s_flags & MS_SYNCHRONOUS) &&
+ !(fi->flags & CEPH_F_SYNC)) {
ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ if (ret >= 0)
+ written = ret;
+
if ((ret >= 0 || ret == -EIOCBQUEUED) &&
((file->f_flags & O_SYNC) || IS_SYNC(file->f_mapping->host)
|| ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_NEARFULL))) {
- err = vfs_fsync_range(file, pos, pos + ret - 1, 1);
+ err = vfs_fsync_range(file, pos, pos + written - 1, 1);
if (err < 0)
ret = err;
}
+ if ((ret < 0 && ret != -EAGAIN) || pos + written >= endoff)
+ goto out;
+ }
- if (dirty)
- __mark_inode_dirty(inode, dirty);
+ dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
+ inode, ceph_vinop(inode), pos + written,
+ (unsigned)iov->iov_len - written, inode->i_size);
+ ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, 0, &got, endoff);
+ if (ret < 0)
goto out;
- }
+ dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n",
+ inode, ceph_vinop(inode), pos + written,
+ (unsigned)iov->iov_len - written, ceph_cap_string(got));
+ ret = ceph_sync_write(file, iov->iov_base + written,
+ iov->iov_len - written, &iocb->ki_pos);
if (ret >= 0) {
int dirty;
spin_lock(&ci->i_ceph_lock);
@@ -777,13 +767,10 @@ retry_snap:
if (dirty)
__mark_inode_dirty(inode, dirty);
}
-
-out_put:
dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
- inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
- ceph_cap_string(got));
+ inode, ceph_vinop(inode), pos + written,
+ (unsigned)iov->iov_len - written, ceph_cap_string(got));
ceph_put_cap_refs(ci, got);
-
out:
if (ret == -EOLDSNAPC) {
dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n",
@@ -797,7 +784,7 @@ out:
/*
* llseek. be sure to verify file size on SEEK_END.
*/
-static loff_t ceph_llseek(struct file *file, loff_t offset, int origin)
+static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
int ret;
@@ -805,7 +792,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int origin)
mutex_lock(&inode->i_mutex);
__ceph_do_pending_vmtruncate(inode);
- if (origin == SEEK_END || origin == SEEK_DATA || origin == SEEK_HOLE) {
+ if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE);
if (ret < 0) {
offset = ret;
@@ -813,7 +800,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int origin)
}
}
- switch (origin) {
+ switch (whence) {
case SEEK_END:
offset += inode->i_size;
break;
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index ba95eea201bf..2971eaa65cdc 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1466,7 +1466,7 @@ void __ceph_do_pending_vmtruncate(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
u64 to;
- int wrbuffer_refs, wake = 0;
+ int wrbuffer_refs, finish = 0;
retry:
spin_lock(&ci->i_ceph_lock);
@@ -1498,15 +1498,18 @@ retry:
truncate_inode_pages(inode->i_mapping, to);
spin_lock(&ci->i_ceph_lock);
- ci->i_truncate_pending--;
- if (ci->i_truncate_pending == 0)
- wake = 1;
+ if (to == ci->i_truncate_size) {
+ ci->i_truncate_pending = 0;
+ finish = 1;
+ }
spin_unlock(&ci->i_ceph_lock);
+ if (!finish)
+ goto retry;
if (wrbuffer_refs == 0)
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
- if (wake)
- wake_up_all(&ci->i_cap_wq);
+
+ wake_up_all(&ci->i_cap_wq);
}
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 1bcf712655d9..9165eb8309eb 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1590,7 +1590,7 @@ static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry,
} else if (rpath || rino) {
*ino = rino;
*ppath = rpath;
- *pathlen = strlen(rpath);
+ *pathlen = rpath ? strlen(rpath) : 0;
dout(" path %.*s\n", *pathlen, rpath);
}
@@ -1876,9 +1876,14 @@ finish:
static void __wake_requests(struct ceph_mds_client *mdsc,
struct list_head *head)
{
- struct ceph_mds_request *req, *nreq;
+ struct ceph_mds_request *req;
+ LIST_HEAD(tmp_list);
+
+ list_splice_init(head, &tmp_list);
- list_for_each_entry_safe(req, nreq, head, r_wait) {
+ while (!list_empty(&tmp_list)) {
+ req = list_entry(tmp_list.next,
+ struct ceph_mds_request, r_wait);
list_del_init(&req->r_wait);
__do_request(mdsc, req);
}
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 2eb43f211325..e86aa9948124 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -403,8 +403,6 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
seq_printf(m, ",mount_timeout=%d", opt->mount_timeout);
if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl);
- if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT)
- seq_printf(m, ",osdtimeout=%d", opt->osd_timeout);
if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
seq_printf(m, ",osdkeepalivetimeout=%d",
opt->osd_keepalive_timeout);
@@ -849,7 +847,7 @@ static int ceph_register_bdi(struct super_block *sb,
fsc->backing_dev_info.ra_pages =
default_backing_dev_info.ra_pages;
- err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
+ err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld",
atomic_long_inc_return(&bdi_seq));
if (!err)
sb->s_bdi = &fsc->backing_dev_info;
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 2075ddfffa73..21ff76c22a17 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -122,9 +122,17 @@ config CIFS_ACL
Allows fetching CIFS/NTFS ACL from the server. The DACL blob
is handed over to the application/caller.
+config CIFS_DEBUG
+ bool "Enable CIFS debugging routines"
+ default y
+ depends on CIFS
+ help
+ Enabling this option adds helpful debugging messages to
+ the cifs code which increases the size of the cifs module.
+ If unsure, say Y.
config CIFS_DEBUG2
bool "Enable additional CIFS debugging routines"
- depends on CIFS
+ depends on CIFS_DEBUG
help
Enabling this option adds a few more debugging routines
to the cifs code which slightly increases the size of
diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index c0c68bb492d7..69ae3d3c3b31 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -18,7 +18,6 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
-#define CIFS_DEBUG /* BB temporary */
#ifndef _H_CIFS_DEBUG
#define _H_CIFS_DEBUG
@@ -37,49 +36,39 @@ void dump_smb(void *, int);
#define CIFS_RC 0x02
#define CIFS_TIMER 0x04
+extern int cifsFYI;
+
/*
* debug ON
* --------
*/
-#ifdef CIFS_DEBUG
+#ifdef CONFIG_CIFS_DEBUG
/* information message: e.g., configuration, major event */
-extern int cifsFYI;
-#define cifsfyi(fmt, arg...) \
+#define cifsfyi(fmt, ...) \
do { \
if (cifsFYI & CIFS_INFO) \
- printk(KERN_DEBUG "%s: " fmt "\n", __FILE__, ##arg); \
-} while (0)
-
-#define cFYI(set, fmt, arg...) \
-do { \
- if (set) \
- cifsfyi(fmt, ##arg); \
+ printk(KERN_DEBUG "%s: " fmt "\n", \
+ __FILE__, ##__VA_ARGS__); \
} while (0)
-#define cifswarn(fmt, arg...) \
- printk(KERN_WARNING fmt "\n", ##arg)
-
-/* debug event message: */
-extern int cifsERROR;
-
-#define cEVENT(fmt, arg...) \
+#define cFYI(set, fmt, ...) \
do { \
- if (cifsERROR) \
- printk(KERN_EVENT "%s: " fmt "\n", __FILE__, ##arg); \
+ if (set) \
+ cifsfyi(fmt, ##__VA_ARGS__); \
} while (0)
+#define cifswarn(fmt, ...) \
+ printk(KERN_WARNING fmt "\n", ##__VA_ARGS__)
+
/* error event message: e.g., i/o error */
-#define cifserror(fmt, arg...) \
-do { \
- if (cifsERROR) \
- printk(KERN_ERR "CIFS VFS: " fmt "\n", ##arg); \
-} while (0)
+#define cifserror(fmt, ...) \
+ printk(KERN_ERR "CIFS VFS: " fmt "\n", ##__VA_ARGS__); \
-#define cERROR(set, fmt, arg...) \
-do { \
- if (set) \
- cifserror(fmt, ##arg); \
+#define cERROR(set, fmt, ...) \
+do { \
+ if (set) \
+ cifserror(fmt, ##__VA_ARGS__); \
} while (0)
/*
@@ -87,10 +76,27 @@ do { \
* ---------
*/
#else /* _CIFS_DEBUG */
-#define cERROR(set, fmt, arg...)
-#define cEVENT(fmt, arg...)
-#define cFYI(set, fmt, arg...)
-#define cifserror(fmt, arg...)
+#define cifsfyi(fmt, ...) \
+do { \
+ if (0) \
+ printk(KERN_DEBUG "%s: " fmt "\n", \
+ __FILE__, ##__VA_ARGS__); \
+} while (0)
+#define cFYI(set, fmt, ...) \
+do { \
+ if (0 && set) \
+ cifsfyi(fmt, ##__VA_ARGS__); \
+} while (0)
+#define cifserror(fmt, ...) \
+do { \
+ if (0) \
+ printk(KERN_ERR "CIFS VFS: " fmt "\n", ##__VA_ARGS__); \
+} while (0)
+#define cERROR(set, fmt, ...) \
+do { \
+ if (0 && set) \
+ cifserror(fmt, ##__VA_ARGS__); \
+} while (0)
#endif /* _CIFS_DEBUG */
#endif /* _H_CIFS_DEBUG */
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index ce5cbd717bfc..210fce2df308 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -226,6 +226,8 @@ compose_mount_options_out:
compose_mount_options_err:
kfree(mountdata);
mountdata = ERR_PTR(rc);
+ kfree(*devname);
+ *devname = NULL;
goto compose_mount_options_out;
}
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index fc783e264420..5cbd00e74067 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -42,135 +42,27 @@ static const struct cifs_sid sid_authusers = {
/* group users */
static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
-const struct cred *root_cred;
-
-static void
-shrink_idmap_tree(struct rb_root *root, int nr_to_scan, int *nr_rem,
- int *nr_del)
-{
- struct rb_node *node;
- struct rb_node *tmp;
- struct cifs_sid_id *psidid;
-
- node = rb_first(root);
- while (node) {
- tmp = node;
- node = rb_next(tmp);
- psidid = rb_entry(tmp, struct cifs_sid_id, rbnode);
- if (nr_to_scan == 0 || *nr_del == nr_to_scan)
- ++(*nr_rem);
- else {
- if (time_after(jiffies, psidid->time + SID_MAP_EXPIRE)
- && psidid->refcount == 0) {
- rb_erase(tmp, root);
- ++(*nr_del);
- } else
- ++(*nr_rem);
- }
- }
-}
-
-/*
- * Run idmap cache shrinker.
- */
-static int
-cifs_idmap_shrinker(struct shrinker *shrink, struct shrink_control *sc)
-{
- int nr_to_scan = sc->nr_to_scan;
- int nr_del = 0;
- int nr_rem = 0;
- struct rb_root *root;
-
- root = &uidtree;
- spin_lock(&siduidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&siduidlock);
-
- root = &gidtree;
- spin_lock(&sidgidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&sidgidlock);
-
- root = &siduidtree;
- spin_lock(&uidsidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&uidsidlock);
-
- root = &sidgidtree;
- spin_lock(&gidsidlock);
- shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
- spin_unlock(&gidsidlock);
-
- return nr_rem;
-}
-
-static void
-sid_rb_insert(struct rb_root *root, unsigned long cid,
- struct cifs_sid_id **psidid, char *typestr)
-{
- char *strptr;
- struct rb_node *node = root->rb_node;
- struct rb_node *parent = NULL;
- struct rb_node **linkto = &(root->rb_node);
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- parent = node;
- if (cid > lsidid->id) {
- linkto = &(node->rb_left);
- node = node->rb_left;
- }
- if (cid < lsidid->id) {
- linkto = &(node->rb_right);
- node = node->rb_right;
- }
- }
-
- (*psidid)->id = cid;
- (*psidid)->time = jiffies - (SID_MAP_RETRY + 1);
- (*psidid)->refcount = 0;
-
- sprintf((*psidid)->sidstr, "%s", typestr);
- strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr);
- sprintf(strptr, "%ld", cid);
-
- clear_bit(SID_ID_PENDING, &(*psidid)->state);
- clear_bit(SID_ID_MAPPED, &(*psidid)->state);
-
- rb_link_node(&(*psidid)->rbnode, parent, linkto);
- rb_insert_color(&(*psidid)->rbnode, root);
-}
-
-static struct cifs_sid_id *
-sid_rb_search(struct rb_root *root, unsigned long cid)
-{
- struct rb_node *node = root->rb_node;
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- if (cid > lsidid->id)
- node = node->rb_left;
- else if (cid < lsidid->id)
- node = node->rb_right;
- else /* node found */
- return lsidid;
- }
-
- return NULL;
-}
-
-static struct shrinker cifs_shrinker = {
- .shrink = cifs_idmap_shrinker,
- .seeks = DEFAULT_SEEKS,
-};
+static const struct cred *root_cred;
static int
cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
{
char *payload;
+ /*
+ * If the payload is less than or equal to the size of a pointer, then
+ * an allocation here is wasteful. Just copy the data directly to the
+ * payload.value union member instead.
+ *
+ * With this however, you must check the datalen before trying to
+ * dereference payload.data!
+ */
+ if (prep->datalen <= sizeof(key->payload)) {
+ key->payload.value = 0;
+ memcpy(&key->payload.value, prep->data, prep->datalen);
+ key->datalen = prep->datalen;
+ return 0;
+ }
payload = kmalloc(prep->datalen, GFP_KERNEL);
if (!payload)
return -ENOMEM;
@@ -184,10 +76,11 @@ cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
static inline void
cifs_idmap_key_destroy(struct key *key)
{
- kfree(key->payload.data);
+ if (key->datalen > sizeof(key->payload))
+ kfree(key->payload.data);
}
-struct key_type cifs_idmap_key_type = {
+static struct key_type cifs_idmap_key_type = {
.name = "cifs.idmap",
.instantiate = cifs_idmap_key_instantiate,
.destroy = cifs_idmap_key_destroy,
@@ -195,214 +88,174 @@ struct key_type cifs_idmap_key_type = {
.match = user_match,
};
-static void
-sid_to_str(struct cifs_sid *sidptr, char *sidstr)
+static char *
+sid_to_key_str(struct cifs_sid *sidptr, unsigned int type)
{
- int i;
- unsigned long saval;
- char *strptr;
+ int i, len;
+ unsigned int saval;
+ char *sidstr, *strptr;
+ unsigned long long id_auth_val;
+
+ /* 3 bytes for prefix */
+ sidstr = kmalloc(3 + SID_STRING_BASE_SIZE +
+ (SID_STRING_SUBAUTH_SIZE * sidptr->num_subauth),
+ GFP_KERNEL);
+ if (!sidstr)
+ return sidstr;
strptr = sidstr;
+ len = sprintf(strptr, "%cs:S-%hhu", type == SIDOWNER ? 'o' : 'g',
+ sidptr->revision);
+ strptr += len;
+
+ /* The authority field is a single 48-bit number */
+ id_auth_val = (unsigned long long)sidptr->authority[5];
+ id_auth_val |= (unsigned long long)sidptr->authority[4] << 8;
+ id_auth_val |= (unsigned long long)sidptr->authority[3] << 16;
+ id_auth_val |= (unsigned long long)sidptr->authority[2] << 24;
+ id_auth_val |= (unsigned long long)sidptr->authority[1] << 32;
+ id_auth_val |= (unsigned long long)sidptr->authority[0] << 48;
- sprintf(strptr, "%s", "S");
- strptr = sidstr + strlen(sidstr);
-
- sprintf(strptr, "-%d", sidptr->revision);
- strptr = sidstr + strlen(sidstr);
+ /*
+ * MS-DTYP states that if the authority is >= 2^32, then it should be
+ * expressed as a hex value.
+ */
+ if (id_auth_val <= UINT_MAX)
+ len = sprintf(strptr, "-%llu", id_auth_val);
+ else
+ len = sprintf(strptr, "-0x%llx", id_auth_val);
- for (i = 0; i < 6; ++i) {
- if (sidptr->authority[i]) {
- sprintf(strptr, "-%d", sidptr->authority[i]);
- strptr = sidstr + strlen(sidstr);
- }
- }
+ strptr += len;
for (i = 0; i < sidptr->num_subauth; ++i) {
saval = le32_to_cpu(sidptr->sub_auth[i]);
- sprintf(strptr, "-%ld", saval);
- strptr = sidstr + strlen(sidstr);
+ len = sprintf(strptr, "-%u", saval);
+ strptr += len;
}
+
+ return sidstr;
}
-static void
-id_rb_insert(struct rb_root *root, struct cifs_sid *sidptr,
- struct cifs_sid_id **psidid, char *typestr)
+/*
+ * if the two SIDs (roughly equivalent to a UUID for a user or group) are
+ * the same returns zero, if they do not match returns non-zero.
+ */
+static int
+compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
{
- int rc;
- char *strptr;
- struct rb_node *node = root->rb_node;
- struct rb_node *parent = NULL;
- struct rb_node **linkto = &(root->rb_node);
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- parent = node;
- rc = compare_sids(sidptr, &((lsidid)->sid));
- if (rc > 0) {
- linkto = &(node->rb_left);
- node = node->rb_left;
- } else if (rc < 0) {
- linkto = &(node->rb_right);
- node = node->rb_right;
- }
- }
-
- memcpy(&(*psidid)->sid, sidptr, sizeof(struct cifs_sid));
- (*psidid)->time = jiffies - (SID_MAP_RETRY + 1);
- (*psidid)->refcount = 0;
+ int i;
+ int num_subauth, num_sat, num_saw;
- sprintf((*psidid)->sidstr, "%s", typestr);
- strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr);
- sid_to_str(&(*psidid)->sid, strptr);
+ if ((!ctsid) || (!cwsid))
+ return 1;
- clear_bit(SID_ID_PENDING, &(*psidid)->state);
- clear_bit(SID_ID_MAPPED, &(*psidid)->state);
+ /* compare the revision */
+ if (ctsid->revision != cwsid->revision) {
+ if (ctsid->revision > cwsid->revision)
+ return 1;
+ else
+ return -1;
+ }
- rb_link_node(&(*psidid)->rbnode, parent, linkto);
- rb_insert_color(&(*psidid)->rbnode, root);
-}
+ /* compare all of the six auth values */
+ for (i = 0; i < NUM_AUTHS; ++i) {
+ if (ctsid->authority[i] != cwsid->authority[i]) {
+ if (ctsid->authority[i] > cwsid->authority[i])
+ return 1;
+ else
+ return -1;
+ }
+ }
-static struct cifs_sid_id *
-id_rb_search(struct rb_root *root, struct cifs_sid *sidptr)
-{
- int rc;
- struct rb_node *node = root->rb_node;
- struct cifs_sid_id *lsidid;
-
- while (node) {
- lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
- rc = compare_sids(sidptr, &((lsidid)->sid));
- if (rc > 0) {
- node = node->rb_left;
- } else if (rc < 0) {
- node = node->rb_right;
- } else /* node found */
- return lsidid;
+ /* compare all of the subauth values if any */
+ num_sat = ctsid->num_subauth;
+ num_saw = cwsid->num_subauth;
+ num_subauth = num_sat < num_saw ? num_sat : num_saw;
+ if (num_subauth) {
+ for (i = 0; i < num_subauth; ++i) {
+ if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) {
+ if (le32_to_cpu(ctsid->sub_auth[i]) >
+ le32_to_cpu(cwsid->sub_auth[i]))
+ return 1;
+ else
+ return -1;
+ }
+ }
}
- return NULL;
+ return 0; /* sids compare/match */
}
-static int
-sidid_pending_wait(void *unused)
+static void
+cifs_copy_sid(struct cifs_sid *dst, const struct cifs_sid *src)
{
- schedule();
- return signal_pending(current) ? -ERESTARTSYS : 0;
+ int i;
+
+ dst->revision = src->revision;
+ dst->num_subauth = min_t(u8, src->num_subauth, SID_MAX_SUB_AUTHORITIES);
+ for (i = 0; i < NUM_AUTHS; ++i)
+ dst->authority[i] = src->authority[i];
+ for (i = 0; i < dst->num_subauth; ++i)
+ dst->sub_auth[i] = src->sub_auth[i];
}
static int
-id_to_sid(unsigned long cid, uint sidtype, struct cifs_sid *ssid)
+id_to_sid(unsigned int cid, uint sidtype, struct cifs_sid *ssid)
{
- int rc = 0;
+ int rc;
struct key *sidkey;
+ struct cifs_sid *ksid;
+ unsigned int ksid_size;
+ char desc[3 + 10 + 1]; /* 3 byte prefix + 10 bytes for value + NULL */
const struct cred *saved_cred;
- struct cifs_sid *lsid;
- struct cifs_sid_id *psidid, *npsidid;
- struct rb_root *cidtree;
- spinlock_t *cidlock;
-
- if (sidtype == SIDOWNER) {
- cidlock = &siduidlock;
- cidtree = &uidtree;
- } else if (sidtype == SIDGROUP) {
- cidlock = &sidgidlock;
- cidtree = &gidtree;
- } else
- return -EINVAL;
-
- spin_lock(cidlock);
- psidid = sid_rb_search(cidtree, cid);
-
- if (!psidid) { /* node does not exist, allocate one & attempt adding */
- spin_unlock(cidlock);
- npsidid = kzalloc(sizeof(struct cifs_sid_id), GFP_KERNEL);
- if (!npsidid)
- return -ENOMEM;
- npsidid->sidstr = kmalloc(SIDLEN, GFP_KERNEL);
- if (!npsidid->sidstr) {
- kfree(npsidid);
- return -ENOMEM;
- }
+ rc = snprintf(desc, sizeof(desc), "%ci:%u",
+ sidtype == SIDOWNER ? 'o' : 'g', cid);
+ if (rc >= sizeof(desc))
+ return -EINVAL;
- spin_lock(cidlock);
- psidid = sid_rb_search(cidtree, cid);
- if (psidid) { /* node happened to get inserted meanwhile */
- ++psidid->refcount;
- spin_unlock(cidlock);
- kfree(npsidid->sidstr);
- kfree(npsidid);
- } else {
- psidid = npsidid;
- sid_rb_insert(cidtree, cid, &psidid,
- sidtype == SIDOWNER ? "oi:" : "gi:");
- ++psidid->refcount;
- spin_unlock(cidlock);
- }
- } else {
- ++psidid->refcount;
- spin_unlock(cidlock);
+ rc = 0;
+ saved_cred = override_creds(root_cred);
+ sidkey = request_key(&cifs_idmap_key_type, desc, "");
+ if (IS_ERR(sidkey)) {
+ rc = -EINVAL;
+ cFYI(1, "%s: Can't map %cid %u to a SID", __func__,
+ sidtype == SIDOWNER ? 'u' : 'g', cid);
+ goto out_revert_creds;
+ } else if (sidkey->datalen < CIFS_SID_BASE_SIZE) {
+ rc = -EIO;
+ cFYI(1, "%s: Downcall contained malformed key "
+ "(datalen=%hu)", __func__, sidkey->datalen);
+ goto invalidate_key;
}
/*
- * If we are here, it is safe to access psidid and its fields
- * since a reference was taken earlier while holding the spinlock.
- * A reference on the node is put without holding the spinlock
- * and it is OK to do so in this case, shrinker will not erase
- * this node until all references are put and we do not access
- * any fields of the node after a reference is put .
+ * A sid is usually too large to be embedded in payload.value, but if
+ * there are no subauthorities and the host has 8-byte pointers, then
+ * it could be.
*/
- if (test_bit(SID_ID_MAPPED, &psidid->state)) {
- memcpy(ssid, &psidid->sid, sizeof(struct cifs_sid));
- psidid->time = jiffies; /* update ts for accessing */
- goto id_sid_out;
- }
-
- if (time_after(psidid->time + SID_MAP_RETRY, jiffies)) {
- rc = -EINVAL;
- goto id_sid_out;
+ ksid = sidkey->datalen <= sizeof(sidkey->payload) ?
+ (struct cifs_sid *)&sidkey->payload.value :
+ (struct cifs_sid *)sidkey->payload.data;
+
+ ksid_size = CIFS_SID_BASE_SIZE + (ksid->num_subauth * sizeof(__le32));
+ if (ksid_size > sidkey->datalen) {
+ rc = -EIO;
+ cFYI(1, "%s: Downcall contained malformed key (datalen=%hu, "
+ "ksid_size=%u)", __func__, sidkey->datalen, ksid_size);
+ goto invalidate_key;
}
- if (!test_and_set_bit(SID_ID_PENDING, &psidid->state)) {
- saved_cred = override_creds(root_cred);
- sidkey = request_key(&cifs_idmap_key_type, psidid->sidstr, "");
- if (IS_ERR(sidkey)) {
- rc = -EINVAL;
- cFYI(1, "%s: Can't map and id to a SID", __func__);
- } else {
- lsid = (struct cifs_sid *)sidkey->payload.data;
- memcpy(&psidid->sid, lsid,
- sidkey->datalen < sizeof(struct cifs_sid) ?
- sidkey->datalen : sizeof(struct cifs_sid));
- memcpy(ssid, &psidid->sid,
- sidkey->datalen < sizeof(struct cifs_sid) ?
- sidkey->datalen : sizeof(struct cifs_sid));
- set_bit(SID_ID_MAPPED, &psidid->state);
- key_put(sidkey);
- kfree(psidid->sidstr);
- }
- psidid->time = jiffies; /* update ts for accessing */
- revert_creds(saved_cred);
- clear_bit(SID_ID_PENDING, &psidid->state);
- wake_up_bit(&psidid->state, SID_ID_PENDING);
- } else {
- rc = wait_on_bit(&psidid->state, SID_ID_PENDING,
- sidid_pending_wait, TASK_INTERRUPTIBLE);
- if (rc) {
- cFYI(1, "%s: sidid_pending_wait interrupted %d",
- __func__, rc);
- --psidid->refcount;
- return rc;
- }
- if (test_bit(SID_ID_MAPPED, &psidid->state))
- memcpy(ssid, &psidid->sid, sizeof(struct cifs_sid));
- else
- rc = -EINVAL;
- }
-id_sid_out:
- --psidid->refcount;
+ cifs_copy_sid(ssid, ksid);
+out_key_put:
+ key_put(sidkey);
+out_revert_creds:
+ revert_creds(saved_cred);
return rc;
+
+invalidate_key:
+ key_invalidate(sidkey);
+ goto out_key_put;
}
static int
@@ -410,111 +263,67 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
struct cifs_fattr *fattr, uint sidtype)
{
int rc;
- unsigned long cid;
- struct key *idkey;
+ struct key *sidkey;
+ char *sidstr;
const struct cred *saved_cred;
- struct cifs_sid_id *psidid, *npsidid;
- struct rb_root *cidtree;
- spinlock_t *cidlock;
-
- if (sidtype == SIDOWNER) {
- cid = cifs_sb->mnt_uid; /* default uid, in case upcall fails */
- cidlock = &siduidlock;
- cidtree = &uidtree;
- } else if (sidtype == SIDGROUP) {
- cid = cifs_sb->mnt_gid; /* default gid, in case upcall fails */
- cidlock = &sidgidlock;
- cidtree = &gidtree;
- } else
- return -ENOENT;
-
- spin_lock(cidlock);
- psidid = id_rb_search(cidtree, psid);
-
- if (!psidid) { /* node does not exist, allocate one & attempt adding */
- spin_unlock(cidlock);
- npsidid = kzalloc(sizeof(struct cifs_sid_id), GFP_KERNEL);
- if (!npsidid)
- return -ENOMEM;
-
- npsidid->sidstr = kmalloc(SIDLEN, GFP_KERNEL);
- if (!npsidid->sidstr) {
- kfree(npsidid);
- return -ENOMEM;
- }
-
- spin_lock(cidlock);
- psidid = id_rb_search(cidtree, psid);
- if (psidid) { /* node happened to get inserted meanwhile */
- ++psidid->refcount;
- spin_unlock(cidlock);
- kfree(npsidid->sidstr);
- kfree(npsidid);
- } else {
- psidid = npsidid;
- id_rb_insert(cidtree, psid, &psidid,
- sidtype == SIDOWNER ? "os:" : "gs:");
- ++psidid->refcount;
- spin_unlock(cidlock);
- }
- } else {
- ++psidid->refcount;
- spin_unlock(cidlock);
- }
+ uid_t fuid = cifs_sb->mnt_uid;
+ gid_t fgid = cifs_sb->mnt_gid;
/*
- * If we are here, it is safe to access psidid and its fields
- * since a reference was taken earlier while holding the spinlock.
- * A reference on the node is put without holding the spinlock
- * and it is OK to do so in this case, shrinker will not erase
- * this node until all references are put and we do not access
- * any fields of the node after a reference is put .
+ * If we have too many subauthorities, then something is really wrong.
+ * Just return an error.
*/
- if (test_bit(SID_ID_MAPPED, &psidid->state)) {
- cid = psidid->id;
- psidid->time = jiffies; /* update ts for accessing */
- goto sid_to_id_out;
+ if (unlikely(psid->num_subauth > SID_MAX_SUB_AUTHORITIES)) {
+ cFYI(1, "%s: %u subauthorities is too many!", __func__,
+ psid->num_subauth);
+ return -EIO;
}
- if (time_after(psidid->time + SID_MAP_RETRY, jiffies))
- goto sid_to_id_out;
-
- if (!test_and_set_bit(SID_ID_PENDING, &psidid->state)) {
- saved_cred = override_creds(root_cred);
- idkey = request_key(&cifs_idmap_key_type, psidid->sidstr, "");
- if (IS_ERR(idkey))
- cFYI(1, "%s: Can't map SID to an id", __func__);
- else {
- cid = *(unsigned long *)idkey->payload.value;
- psidid->id = cid;
- set_bit(SID_ID_MAPPED, &psidid->state);
- key_put(idkey);
- kfree(psidid->sidstr);
- }
- revert_creds(saved_cred);
- psidid->time = jiffies; /* update ts for accessing */
- clear_bit(SID_ID_PENDING, &psidid->state);
- wake_up_bit(&psidid->state, SID_ID_PENDING);
- } else {
- rc = wait_on_bit(&psidid->state, SID_ID_PENDING,
- sidid_pending_wait, TASK_INTERRUPTIBLE);
- if (rc) {
- cFYI(1, "%s: sidid_pending_wait interrupted %d",
- __func__, rc);
- --psidid->refcount; /* decremented without spinlock */
- return rc;
- }
- if (test_bit(SID_ID_MAPPED, &psidid->state))
- cid = psidid->id;
+ sidstr = sid_to_key_str(psid, sidtype);
+ if (!sidstr)
+ return -ENOMEM;
+
+ saved_cred = override_creds(root_cred);
+ sidkey = request_key(&cifs_idmap_key_type, sidstr, "");
+ if (IS_ERR(sidkey)) {
+ rc = -EINVAL;
+ cFYI(1, "%s: Can't map SID %s to a %cid", __func__, sidstr,
+ sidtype == SIDOWNER ? 'u' : 'g');
+ goto out_revert_creds;
+ }
+
+ /*
+ * FIXME: Here we assume that uid_t and gid_t are same size. It's
+ * probably a safe assumption but might be better to check based on
+ * sidtype.
+ */
+ if (sidkey->datalen != sizeof(uid_t)) {
+ rc = -EIO;
+ cFYI(1, "%s: Downcall contained malformed key "
+ "(datalen=%hu)", __func__, sidkey->datalen);
+ key_invalidate(sidkey);
+ goto out_key_put;
}
-sid_to_id_out:
- --psidid->refcount; /* decremented without spinlock */
if (sidtype == SIDOWNER)
- fattr->cf_uid = cid;
+ memcpy(&fuid, &sidkey->payload.value, sizeof(uid_t));
else
- fattr->cf_gid = cid;
+ memcpy(&fgid, &sidkey->payload.value, sizeof(gid_t));
+
+out_key_put:
+ key_put(sidkey);
+out_revert_creds:
+ revert_creds(saved_cred);
+ kfree(sidstr);
+ /*
+ * Note that we return 0 here unconditionally. If the mapping
+ * fails then we just fall back to using the mnt_uid/mnt_gid.
+ */
+ if (sidtype == SIDOWNER)
+ fattr->cf_uid = fuid;
+ else
+ fattr->cf_gid = fgid;
return 0;
}
@@ -537,19 +346,15 @@ init_cifs_idmap(void)
if (!cred)
return -ENOMEM;
- keyring = key_alloc(&key_type_keyring, ".cifs_idmap", 0, 0, cred,
- (KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ,
- KEY_ALLOC_NOT_IN_QUOTA);
+ keyring = keyring_alloc(".cifs_idmap", 0, 0, cred,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
+ KEY_ALLOC_NOT_IN_QUOTA, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto failed_put_cred;
}
- ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL);
- if (ret < 0)
- goto failed_put_key;
-
ret = register_key_type(&cifs_idmap_key_type);
if (ret < 0)
goto failed_put_key;
@@ -561,17 +366,6 @@ init_cifs_idmap(void)
cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
root_cred = cred;
- spin_lock_init(&siduidlock);
- uidtree = RB_ROOT;
- spin_lock_init(&sidgidlock);
- gidtree = RB_ROOT;
-
- spin_lock_init(&uidsidlock);
- siduidtree = RB_ROOT;
- spin_lock_init(&gidsidlock);
- sidgidtree = RB_ROOT;
- register_shrinker(&cifs_shrinker);
-
cFYI(1, "cifs idmap keyring: %d", key_serial(keyring));
return 0;
@@ -588,95 +382,13 @@ exit_cifs_idmap(void)
key_revoke(root_cred->thread_keyring);
unregister_key_type(&cifs_idmap_key_type);
put_cred(root_cred);
- unregister_shrinker(&cifs_shrinker);
cFYI(1, "Unregistered %s key type", cifs_idmap_key_type.name);
}
-void
-cifs_destroy_idmaptrees(void)
-{
- struct rb_root *root;
- struct rb_node *node;
-
- root = &uidtree;
- spin_lock(&siduidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&siduidlock);
-
- root = &gidtree;
- spin_lock(&sidgidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&sidgidlock);
-
- root = &siduidtree;
- spin_lock(&uidsidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&uidsidlock);
-
- root = &sidgidtree;
- spin_lock(&gidsidlock);
- while ((node = rb_first(root)))
- rb_erase(node, root);
- spin_unlock(&gidsidlock);
-}
-
-/* if the two SIDs (roughly equivalent to a UUID for a user or group) are
- the same returns 1, if they do not match returns 0 */
-int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
-{
- int i;
- int num_subauth, num_sat, num_saw;
-
- if ((!ctsid) || (!cwsid))
- return 1;
-
- /* compare the revision */
- if (ctsid->revision != cwsid->revision) {
- if (ctsid->revision > cwsid->revision)
- return 1;
- else
- return -1;
- }
-
- /* compare all of the six auth values */
- for (i = 0; i < 6; ++i) {
- if (ctsid->authority[i] != cwsid->authority[i]) {
- if (ctsid->authority[i] > cwsid->authority[i])
- return 1;
- else
- return -1;
- }
- }
-
- /* compare all of the subauth values if any */
- num_sat = ctsid->num_subauth;
- num_saw = cwsid->num_subauth;
- num_subauth = num_sat < num_saw ? num_sat : num_saw;
- if (num_subauth) {
- for (i = 0; i < num_subauth; ++i) {
- if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) {
- if (le32_to_cpu(ctsid->sub_auth[i]) >
- le32_to_cpu(cwsid->sub_auth[i]))
- return 1;
- else
- return -1;
- }
- }
- }
-
- return 0; /* sids compare/match */
-}
-
-
/* copy ntsd, owner sid, and group sid from a security descriptor to another */
static void copy_sec_desc(const struct cifs_ntsd *pntsd,
struct cifs_ntsd *pnntsd, __u32 sidsoffset)
{
- int i;
-
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr;
@@ -692,26 +404,14 @@ static void copy_sec_desc(const struct cifs_ntsd *pntsd,
owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
le32_to_cpu(pntsd->osidoffset));
nowner_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset);
-
- nowner_sid_ptr->revision = owner_sid_ptr->revision;
- nowner_sid_ptr->num_subauth = owner_sid_ptr->num_subauth;
- for (i = 0; i < 6; i++)
- nowner_sid_ptr->authority[i] = owner_sid_ptr->authority[i];
- for (i = 0; i < 5; i++)
- nowner_sid_ptr->sub_auth[i] = owner_sid_ptr->sub_auth[i];
+ cifs_copy_sid(nowner_sid_ptr, owner_sid_ptr);
/* copy group sid */
group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
le32_to_cpu(pntsd->gsidoffset));
ngroup_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset +
sizeof(struct cifs_sid));
-
- ngroup_sid_ptr->revision = group_sid_ptr->revision;
- ngroup_sid_ptr->num_subauth = group_sid_ptr->num_subauth;
- for (i = 0; i < 6; i++)
- ngroup_sid_ptr->authority[i] = group_sid_ptr->authority[i];
- for (i = 0; i < 5; i++)
- ngroup_sid_ptr->sub_auth[i] = group_sid_ptr->sub_auth[i];
+ cifs_copy_sid(ngroup_sid_ptr, group_sid_ptr);
return;
}
@@ -818,7 +518,7 @@ static __u16 fill_ace_for_sid(struct cifs_ace *pntace,
pntace->sid.revision = psid->revision;
pntace->sid.num_subauth = psid->num_subauth;
- for (i = 0; i < 6; i++)
+ for (i = 0; i < NUM_AUTHS; i++)
pntace->sid.authority[i] = psid->authority[i];
for (i = 0; i < psid->num_subauth; i++)
pntace->sid.sub_auth[i] = psid->sub_auth[i];
@@ -994,8 +694,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
return -EINVAL;
}
- if (psid->num_subauth) {
#ifdef CONFIG_CIFS_DEBUG2
+ if (psid->num_subauth) {
int i;
cFYI(1, "SID revision %d num_auth %d",
psid->revision, psid->num_subauth);
@@ -1009,8 +709,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
num auths and therefore go off the end */
cFYI(1, "RID 0x%x",
le32_to_cpu(psid->sub_auth[psid->num_subauth-1]));
-#endif
}
+#endif
return 0;
}
@@ -1120,8 +820,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
kfree(nowner_sid_ptr);
return rc;
}
- memcpy(owner_sid_ptr, nowner_sid_ptr,
- sizeof(struct cifs_sid));
+ cifs_copy_sid(owner_sid_ptr, nowner_sid_ptr);
kfree(nowner_sid_ptr);
*aclflag = CIFS_ACL_OWNER;
}
@@ -1139,8 +838,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
kfree(ngroup_sid_ptr);
return rc;
}
- memcpy(group_sid_ptr, ngroup_sid_ptr,
- sizeof(struct cifs_sid));
+ cifs_copy_sid(group_sid_ptr, ngroup_sid_ptr);
kfree(ngroup_sid_ptr);
*aclflag = CIFS_ACL_GROUP;
}
@@ -1316,42 +1014,39 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode,
/* Get the security descriptor */
pntsd = get_cifs_acl(CIFS_SB(inode->i_sb), inode, path, &secdesclen);
-
- /* Add three ACEs for owner, group, everyone getting rid of
- other ACEs as chmod disables ACEs and set the security descriptor */
-
if (IS_ERR(pntsd)) {
rc = PTR_ERR(pntsd);
cERROR(1, "%s: error %d getting sec desc", __func__, rc);
- } else {
- /* allocate memory for the smb header,
- set security descriptor request security descriptor
- parameters, and secuirty descriptor itself */
-
- secdesclen = secdesclen < DEFSECDESCLEN ?
- DEFSECDESCLEN : secdesclen;
- pnntsd = kmalloc(secdesclen, GFP_KERNEL);
- if (!pnntsd) {
- cERROR(1, "Unable to allocate security descriptor");
- kfree(pntsd);
- return -ENOMEM;
- }
+ goto out;
+ }
- rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid,
- &aclflag);
+ /*
+ * Add three ACEs for owner, group, everyone getting rid of other ACEs
+ * as chmod disables ACEs and set the security descriptor. Allocate
+ * memory for the smb header, set security descriptor request security
+ * descriptor parameters, and secuirty descriptor itself
+ */
+ secdesclen = max_t(u32, secdesclen, DEFAULT_SEC_DESC_LEN);
+ pnntsd = kmalloc(secdesclen, GFP_KERNEL);
+ if (!pnntsd) {
+ cERROR(1, "Unable to allocate security descriptor");
+ kfree(pntsd);
+ return -ENOMEM;
+ }
- cFYI(DBG2, "build_sec_desc rc: %d", rc);
+ rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid,
+ &aclflag);
- if (!rc) {
- /* Set the security descriptor */
- rc = set_cifs_acl(pnntsd, secdesclen, inode,
- path, aclflag);
- cFYI(DBG2, "set_cifs_acl rc: %d", rc);
- }
+ cFYI(DBG2, "build_sec_desc rc: %d", rc);
- kfree(pnntsd);
- kfree(pntsd);
+ if (!rc) {
+ /* Set the security descriptor */
+ rc = set_cifs_acl(pnntsd, secdesclen, inode, path, aclflag);
+ cFYI(DBG2, "set_cifs_acl rc: %d", rc);
}
+ kfree(pnntsd);
+ kfree(pntsd);
+out:
return rc;
}
diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
index 5c902c7ce524..4f3884835267 100644
--- a/fs/cifs/cifsacl.h
+++ b/fs/cifs/cifsacl.h
@@ -23,11 +23,8 @@
#define _CIFSACL_H
-#define NUM_AUTHS 6 /* number of authority fields */
-#define NUM_SUBAUTHS 5 /* number of sub authority fields */
-#define NUM_WK_SIDS 7 /* number of well known sids */
-#define SIDNAMELENGTH 20 /* long enough for the ones we care about */
-#define DEFSECDESCLEN 192 /* sec desc len contaiting a dacl with three aces */
+#define NUM_AUTHS (6) /* number of authority fields */
+#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
#define READ_BIT 0x4
#define WRITE_BIT 0x2
@@ -41,12 +38,32 @@
#define SIDOWNER 1
#define SIDGROUP 2
-#define SIDLEN 150 /* S- 1 revision- 6 authorities- max 5 sub authorities */
-#define SID_ID_MAPPED 0
-#define SID_ID_PENDING 1
-#define SID_MAP_EXPIRE (3600 * HZ) /* map entry expires after one hour */
-#define SID_MAP_RETRY (300 * HZ) /* wait 5 minutes for next attempt to map */
+/*
+ * Security Descriptor length containing DACL with 3 ACEs (one each for
+ * owner, group and world).
+ */
+#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
+ sizeof(struct cifs_acl) + \
+ (sizeof(struct cifs_ace) * 3))
+
+/*
+ * Maximum size of a string representation of a SID:
+ *
+ * The fields are unsigned values in decimal. So:
+ *
+ * u8: max 3 bytes in decimal
+ * u32: max 10 bytes in decimal
+ *
+ * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
+ *
+ * For authority field, max is when all 6 values are non-zero and it must be
+ * represented in hex. So "-0x" + 12 hex digits.
+ *
+ * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
+ */
+#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
+#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
struct cifs_ntsd {
__le16 revision; /* revision level */
@@ -60,10 +77,13 @@ struct cifs_ntsd {
struct cifs_sid {
__u8 revision; /* revision level */
__u8 num_subauth;
- __u8 authority[6];
- __le32 sub_auth[5]; /* sub_auth[num_subauth] */
+ __u8 authority[NUM_AUTHS];
+ __le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
} __attribute__((packed));
+/* size of a struct cifs_sid, sans sub_auth array */
+#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
+
struct cifs_acl {
__le16 revision; /* revision level */
__le16 size;
@@ -78,26 +98,4 @@ struct cifs_ace {
struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
} __attribute__((packed));
-struct cifs_wksid {
- struct cifs_sid cifssid;
- char sidname[SIDNAMELENGTH];
-} __attribute__((packed));
-
-struct cifs_sid_id {
- unsigned int refcount; /* increment with spinlock, decrement without */
- unsigned long id;
- unsigned long time;
- unsigned long state;
- char *sidstr;
- struct rb_node rbnode;
- struct cifs_sid sid;
-};
-
-#ifdef __KERNEL__
-extern struct key_type cifs_idmap_key_type;
-extern const struct cred *root_cred;
-#endif /* KERNEL */
-
-extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *);
-
#endif /* _CIFSACL_H */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e7931cc55d0c..de7f9168a118 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -54,7 +54,6 @@
#endif
int cifsFYI = 0;
-int cifsERROR = 1;
int traceSMB = 0;
bool enable_oplocks = true;
unsigned int linuxExtEnabled = 1;
@@ -64,24 +63,23 @@ unsigned int global_secflags = CIFSSEC_DEF;
unsigned int sign_CIFS_PDUs = 1;
static const struct super_operations cifs_super_ops;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
-module_param(CIFSMaxBufSize, int, 0);
+module_param(CIFSMaxBufSize, uint, 0);
MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
"Default: 16384 Range: 8192 to 130048");
unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
-module_param(cifs_min_rcv, int, 0);
+module_param(cifs_min_rcv, uint, 0);
MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
"1 to 64");
unsigned int cifs_min_small = 30;
-module_param(cifs_min_small, int, 0);
+module_param(cifs_min_small, uint, 0);
MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
"Range: 2 to 256");
unsigned int cifs_max_pending = CIFS_MAX_REQ;
-module_param(cifs_max_pending, int, 0444);
+module_param(cifs_max_pending, uint, 0444);
MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
"Default: 32767 Range: 2 to 32767.");
module_param(enable_oplocks, bool, 0644);
-MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
- "y/Y/1");
+MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
@@ -540,8 +538,8 @@ cifs_get_root(struct smb_vol *vol, struct super_block *sb)
char *s, *p;
char sep;
- full_path = build_path_to_root(vol, cifs_sb,
- cifs_sb_master_tcon(cifs_sb));
+ full_path = cifs_build_path_to_root(vol, cifs_sb,
+ cifs_sb_master_tcon(cifs_sb));
if (full_path == NULL)
return ERR_PTR(-ENOMEM);
@@ -695,13 +693,13 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
return written;
}
-static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
+static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
{
/*
- * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+ * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
* the cached file length
*/
- if (origin != SEEK_SET && origin != SEEK_CUR) {
+ if (whence != SEEK_SET && whence != SEEK_CUR) {
int rc;
struct inode *inode = file->f_path.dentry->d_inode;
@@ -728,7 +726,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
if (rc < 0)
return (loff_t)rc;
}
- return generic_file_llseek(file, offset, origin);
+ return generic_file_llseek(file, offset, whence);
}
static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
@@ -1205,7 +1203,6 @@ exit_cifs(void)
unregister_filesystem(&cifs_fs_type);
cifs_dfs_release_automount_timer();
#ifdef CONFIG_CIFS_ACL
- cifs_destroy_idmaptrees();
exit_cifs_idmap();
#endif
#ifdef CONFIG_CIFS_UPCALL
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index f5af2527fc69..e6899cea1c35 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -178,6 +178,7 @@ struct smb_rqst {
enum smb_version {
Smb_1 = 1,
+ Smb_20,
Smb_21,
Smb_30,
};
@@ -280,9 +281,6 @@ struct smb_version_operations {
/* set attributes */
int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
const unsigned int);
- /* build a full path to the root of the mount */
- char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
- struct cifs_tcon *);
/* check if we can send an echo or nor */
bool (*can_echo)(struct TCP_Server_Info *);
/* send echo request */
@@ -369,6 +367,8 @@ struct smb_version_operations {
void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
/* generate new lease key */
void (*new_lease_key)(struct cifs_fid *fid);
+ int (*calc_signature)(struct smb_rqst *rqst,
+ struct TCP_Server_Info *server);
};
struct smb_version_values {
@@ -386,6 +386,7 @@ struct smb_version_values {
unsigned int cap_unix;
unsigned int cap_nt_find;
unsigned int cap_large_files;
+ unsigned int oplock_read;
};
#define HEADER_SIZE(server) (server->vals->header_size)
@@ -396,7 +397,6 @@ struct smb_vol {
char *password;
char *domainname;
char *UNC;
- char *UNCip;
char *iocharset; /* local code page for mapping to and from Unicode */
char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
@@ -444,11 +444,11 @@ struct smb_vol {
unsigned int rsize;
unsigned int wsize;
bool sockopt_tcp_nodelay:1;
- unsigned short int port;
unsigned long actimeo; /* attribute cache timeout (jiffies) */
struct smb_version_operations *ops;
struct smb_version_values *vals;
char *prepath;
+ struct sockaddr_storage dstaddr; /* destination address */
struct sockaddr_storage srcaddr; /* allow binding to a local IP */
struct nls_table *local_nls;
};
@@ -1067,30 +1067,16 @@ static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
static inline void
convert_delimiter(char *path, char delim)
{
- int i;
- char old_delim;
-
- if (path == NULL)
- return;
+ char old_delim, *pos;
if (delim == '/')
old_delim = '\\';
else
old_delim = '/';
- for (i = 0; path[i] != '\0'; i++) {
- if (path[i] == old_delim)
- path[i] = delim;
- }
-}
-
-static inline char *
-build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
- struct cifs_tcon *tcon)
-{
- if (!vol->ops->build_path_to_root)
- return NULL;
- return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
+ pos = path;
+ while ((pos = strchr(pos, old_delim)))
+ *pos = delim;
}
#ifdef CONFIG_CIFS_STATS
@@ -1362,7 +1348,7 @@ require use of the stronger protocol */
#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
-#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
+#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP)
#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
/*
@@ -1506,6 +1492,6 @@ extern struct smb_version_values smb20_values;
extern struct smb_version_operations smb21_operations;
extern struct smb_version_values smb21_values;
#define SMB30_VERSION_STRING "3.0"
-/*extern struct smb_version_operations smb30_operations; */ /* not needed yet */
+extern struct smb_version_operations smb30_operations;
extern struct smb_version_values smb30_values;
#endif /* _CIFS_GLOB_H */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 5144e9fbeb8c..1988c1baa224 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -58,8 +58,10 @@ do { \
} while (0)
extern int init_cifs_idmap(void);
extern void exit_cifs_idmap(void);
-extern void cifs_destroy_idmaptrees(void);
extern char *build_path_from_dentry(struct dentry *);
+extern char *cifs_build_path_to_root(struct smb_vol *vol,
+ struct cifs_sb_info *cifs_sb,
+ struct cifs_tcon *tcon);
extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
extern char *cifs_compose_mount_options(const char *sb_mountdata,
const char *fullpath, const struct dfs_info3_param *ref,
@@ -107,9 +109,7 @@ extern unsigned int smbCalcSize(void *buf);
extern int decode_negTokenInit(unsigned char *security_blob, int length,
struct TCP_Server_Info *server);
extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len);
-extern int cifs_set_port(struct sockaddr *addr, const unsigned short int port);
-extern int cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len,
- const unsigned short int port);
+extern void cifs_set_port(struct sockaddr *addr, const unsigned short int port);
extern int map_smb_to_linux_error(char *buf, bool logErr);
extern void header_assemble(struct smb_hdr *, char /* command */ ,
const struct cifs_tcon *, int /* length of
@@ -185,7 +185,7 @@ extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon);
extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u8 type,
struct cifsLockInfo **conf_lock,
- bool rw_check);
+ int rw_check);
extern void cifs_add_pending_open(struct cifs_fid *fid,
struct tcon_link *tlink,
struct cifs_pending_open *open);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5c670b998ffb..12b3da39733b 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -186,6 +186,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_user, "user=%s" },
{ Opt_user, "username=%s" },
{ Opt_blank_pass, "pass=" },
+ { Opt_blank_pass, "password=" },
{ Opt_pass, "pass=%s" },
{ Opt_pass, "password=%s" },
{ Opt_blank_ip, "ip=" },
@@ -274,6 +275,7 @@ static const match_table_t cifs_cacheflavor_tokens = {
static const match_table_t cifs_smb_version_tokens = {
{ Smb_1, SMB1_VERSION_STRING },
+ { Smb_20, SMB20_VERSION_STRING},
{ Smb_21, SMB21_VERSION_STRING },
{ Smb_30, SMB30_VERSION_STRING },
};
@@ -1074,12 +1076,16 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
vol->vals = &smb1_values;
break;
#ifdef CONFIG_CIFS_SMB2
+ case Smb_20:
+ vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->vals = &smb20_values;
+ break;
case Smb_21:
vol->ops = &smb21_operations;
vol->vals = &smb21_values;
break;
case Smb_30:
- vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->ops = &smb30_operations;
vol->vals = &smb30_values;
break;
#endif
@@ -1090,6 +1096,52 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
return 0;
}
+/*
+ * Parse a devname into substrings and populate the vol->UNC and vol->prepath
+ * fields with the result. Returns 0 on success and an error otherwise.
+ */
+static int
+cifs_parse_devname(const char *devname, struct smb_vol *vol)
+{
+ char *pos;
+ const char *delims = "/\\";
+ size_t len;
+
+ /* make sure we have a valid UNC double delimiter prefix */
+ len = strspn(devname, delims);
+ if (len != 2)
+ return -EINVAL;
+
+ /* find delimiter between host and sharename */
+ pos = strpbrk(devname + 2, delims);
+ if (!pos)
+ return -EINVAL;
+
+ /* skip past delimiter */
+ ++pos;
+
+ /* now go until next delimiter or end of string */
+ len = strcspn(pos, delims);
+
+ /* move "pos" up to delimiter or NULL */
+ pos += len;
+ vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
+ if (!vol->UNC)
+ return -ENOMEM;
+
+ convert_delimiter(vol->UNC, '\\');
+
+ /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
+ if (!*pos++ || !*pos)
+ return 0;
+
+ vol->prepath = kstrdup(pos, GFP_KERNEL);
+ if (!vol->prepath)
+ return -ENOMEM;
+
+ return 0;
+}
+
static int
cifs_parse_mount_options(const char *mountdata, const char *devname,
struct smb_vol *vol)
@@ -1108,11 +1160,17 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
char *string = NULL;
char *tmp_end, *value;
char delim;
+ bool got_ip = false;
+ unsigned short port = 0;
+ struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
separator[0] = ',';
separator[1] = 0;
delim = separator[0];
+ /* ensure we always start with zeroed-out smb_vol */
+ memset(vol, 0, sizeof(*vol));
+
/*
* does not have to be perfect mapping since field is
* informational, only used for servers that do not support
@@ -1169,6 +1227,16 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->backupuid_specified = false; /* no backup intent for a user */
vol->backupgid_specified = false; /* no backup intent for a group */
+ /*
+ * For now, we ignore -EINVAL errors under the assumption that the
+ * unc= and prefixpath= options will be usable.
+ */
+ if (cifs_parse_devname(devname, vol) == -ENOMEM) {
+ printk(KERN_ERR "CIFS: Unable to allocate memory to parse "
+ "device string.\n");
+ goto out_nomem;
+ }
+
while ((data = strsep(&options, separator)) != NULL) {
substring_t args[MAX_OPT_ARGS];
unsigned long option;
@@ -1416,12 +1484,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->dir_mode = option;
break;
case Opt_port:
- if (get_option_ul(args, &option)) {
- cERROR(1, "%s: Invalid port value",
- __func__);
+ if (get_option_ul(args, &option) ||
+ option > USHRT_MAX) {
+ cERROR(1, "%s: Invalid port value", __func__);
goto cifs_parse_mount_err;
}
- vol->port = option;
+ port = (unsigned short)option;
break;
case Opt_rsize:
if (get_option_ul(args, &option)) {
@@ -1537,53 +1605,45 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
vol->password[j] = '\0';
break;
case Opt_blank_ip:
- vol->UNCip = NULL;
+ /* FIXME: should this be an error instead? */
+ got_ip = false;
break;
case Opt_ip:
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- if (strnlen(string, INET6_ADDRSTRLEN) >
- INET6_ADDRSTRLEN) {
- printk(KERN_WARNING "CIFS: ip address "
- "too long\n");
- goto cifs_parse_mount_err;
- }
- vol->UNCip = kstrdup(string, GFP_KERNEL);
- if (!vol->UNCip) {
- printk(KERN_WARNING "CIFS: no memory "
- "for UNC IP\n");
+ if (!cifs_convert_address(dstaddr, string,
+ strlen(string))) {
+ printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
+ string);
goto cifs_parse_mount_err;
}
+ got_ip = true;
break;
case Opt_unc:
- string = match_strdup(args);
- if (string == NULL)
+ string = vol->UNC;
+ vol->UNC = match_strdup(args);
+ if (vol->UNC == NULL)
goto out_nomem;
- temp_len = strnlen(string, 300);
- if (temp_len == 300) {
- printk(KERN_WARNING "CIFS: UNC name too long\n");
- goto cifs_parse_mount_err;
- }
-
- vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
- if (vol->UNC == NULL) {
- printk(KERN_WARNING "CIFS: no memory for UNC\n");
- goto cifs_parse_mount_err;
- }
- strcpy(vol->UNC, string);
-
- if (strncmp(string, "//", 2) == 0) {
- vol->UNC[0] = '\\';
- vol->UNC[1] = '\\';
- } else if (strncmp(string, "\\\\", 2) != 0) {
- printk(KERN_WARNING "CIFS: UNC Path does not "
- "begin with // or \\\\\n");
+ convert_delimiter(vol->UNC, '\\');
+ if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') {
+ printk(KERN_ERR "CIFS: UNC Path does not "
+ "begin with // or \\\\\n");
goto cifs_parse_mount_err;
}
+ /* Compare old unc= option to new one */
+ if (!string || strcmp(string, vol->UNC))
+ printk(KERN_WARNING "CIFS: the value of the "
+ "unc= mount option does not match the "
+ "device string. Using the unc= option "
+ "for now. In 3.10, that option will "
+ "be ignored and the contents of the "
+ "device string will be used "
+ "instead. (%s != %s)\n", string,
+ vol->UNC);
break;
case Opt_domain:
string = match_strdup(args);
@@ -1618,31 +1678,24 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
}
break;
case Opt_prefixpath:
- string = match_strdup(args);
- if (string == NULL)
- goto out_nomem;
-
- temp_len = strnlen(string, 1024);
- if (string[0] != '/')
- temp_len++; /* missing leading slash */
- if (temp_len > 1024) {
- printk(KERN_WARNING "CIFS: prefix too long\n");
- goto cifs_parse_mount_err;
- }
-
- vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
- if (vol->prepath == NULL) {
- printk(KERN_WARNING "CIFS: no memory "
- "for path prefix\n");
- goto cifs_parse_mount_err;
- }
-
- if (string[0] != '/') {
- vol->prepath[0] = '/';
- strcpy(vol->prepath+1, string);
- } else
- strcpy(vol->prepath, string);
+ /* skip over any leading delimiter */
+ if (*args[0].from == '/' || *args[0].from == '\\')
+ args[0].from++;
+ string = vol->prepath;
+ vol->prepath = match_strdup(args);
+ if (vol->prepath == NULL)
+ goto out_nomem;
+ /* Compare old prefixpath= option to new one */
+ if (!string || strcmp(string, vol->prepath))
+ printk(KERN_WARNING "CIFS: the value of the "
+ "prefixpath= mount option does not "
+ "match the device string. Using the "
+ "prefixpath= option for now. In 3.10, "
+ "that option will be ignored and the "
+ "contents of the device string will be "
+ "used instead.(%s != %s)\n", string,
+ vol->prepath);
break;
case Opt_iocharset:
string = match_strdup(args);
@@ -1799,9 +1852,30 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
goto cifs_parse_mount_err;
}
#endif
+ if (!vol->UNC) {
+ cERROR(1, "CIFS mount error: No usable UNC path provided in "
+ "device string or in unc= option!");
+ goto cifs_parse_mount_err;
+ }
- if (vol->UNCip == NULL)
- vol->UNCip = &vol->UNC[2];
+ /* make sure UNC has a share name */
+ if (!strchr(vol->UNC + 3, '\\')) {
+ cERROR(1, "Malformed UNC. Unable to find share name.");
+ goto cifs_parse_mount_err;
+ }
+
+ if (!got_ip) {
+ /* No ip= option specified? Try to get it from UNC */
+ if (!cifs_convert_address(dstaddr, &vol->UNC[2],
+ strlen(&vol->UNC[2]))) {
+ printk(KERN_ERR "Unable to determine destination "
+ "address.\n");
+ goto cifs_parse_mount_err;
+ }
+ }
+
+ /* set the port that we got earlier */
+ cifs_set_port(dstaddr, port);
if (uid_specified)
vol->override_uid = override_uid;
@@ -1843,7 +1917,7 @@ srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
}
case AF_INET6: {
struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
- struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
+ struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
}
default:
@@ -1972,9 +2046,10 @@ match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
return true;
}
-static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
- struct smb_vol *vol)
+static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
{
+ struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
+
if ((server->vals != vol->vals) || (server->ops != vol->ops))
return 0;
@@ -1995,13 +2070,13 @@ static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
}
static struct TCP_Server_Info *
-cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
+cifs_find_tcp_session(struct smb_vol *vol)
{
struct TCP_Server_Info *server;
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
- if (!match_server(server, addr, vol))
+ if (!match_server(server, vol))
continue;
++server->srv_count;
@@ -2051,40 +2126,12 @@ static struct TCP_Server_Info *
cifs_get_tcp_session(struct smb_vol *volume_info)
{
struct TCP_Server_Info *tcp_ses = NULL;
- struct sockaddr_storage addr;
- struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
- struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
int rc;
- memset(&addr, 0, sizeof(struct sockaddr_storage));
-
- cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
-
- if (volume_info->UNCip && volume_info->UNC) {
- rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
- volume_info->UNCip,
- strlen(volume_info->UNCip),
- volume_info->port);
- if (!rc) {
- /* we failed translating address */
- rc = -EINVAL;
- goto out_err;
- }
- } else if (volume_info->UNCip) {
- /* BB using ip addr as tcp_ses name to connect to the
- DFS root below */
- cERROR(1, "Connecting to DFS root not implemented yet");
- rc = -EINVAL;
- goto out_err;
- } else /* which tcp_sess DFS root would we conect to */ {
- cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
- "unc=//192.168.1.100/public) specified");
- rc = -EINVAL;
- goto out_err;
- }
+ cFYI(1, "UNC: %s", volume_info->UNC);
/* see if we already have a matching tcp_ses */
- tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
+ tcp_ses = cifs_find_tcp_session(volume_info);
if (tcp_ses)
return tcp_ses;
@@ -2129,27 +2176,18 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
-
+ memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
+ sizeof(tcp_ses->srcaddr));
+ memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
+ sizeof(tcp_ses->dstaddr));
/*
* at this point we are the only ones with the pointer
* to the struct since the kernel thread not created yet
* no need to spinlock this init of tcpStatus or srv_count
*/
tcp_ses->tcpStatus = CifsNew;
- memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
- sizeof(tcp_ses->srcaddr));
++tcp_ses->srv_count;
- if (addr.ss_family == AF_INET6) {
- cFYI(1, "attempting ipv6 connect");
- /* BB should we allow ipv6 on port 139? */
- /* other OS never observed in Wild doing 139 with v6 */
- memcpy(&tcp_ses->dstaddr, sin_server6,
- sizeof(struct sockaddr_in6));
- } else
- memcpy(&tcp_ses->dstaddr, sin_server,
- sizeof(struct sockaddr_in));
-
rc = ip_connect(tcp_ses);
if (rc < 0) {
cERROR(1, "Error connecting to socket. Aborting operation");
@@ -2397,8 +2435,6 @@ cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
}
#endif /* CONFIG_KEYS */
-static bool warned_on_ntlm; /* globals init to false automatically */
-
static struct cifs_ses *
cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
{
@@ -2475,14 +2511,6 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
ses->cred_uid = volume_info->cred_uid;
ses->linux_uid = volume_info->linux_uid;
- /* ntlmv2 is much stronger than ntlm security, and has been broadly
- supported for many years, time to update default security mechanism */
- if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
- warned_on_ntlm = true;
- cERROR(1, "default security mechanism requested. The default "
- "security mechanism will be upgraded from ntlm to "
- "ntlmv2 in kernel release 3.3");
- }
ses->overrideSecFlg = volume_info->secFlg;
mutex_lock(&ses->session_mutex);
@@ -2598,13 +2626,6 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
}
}
- if (strchr(volume_info->UNC + 3, '\\') == NULL
- && strchr(volume_info->UNC + 3, '/') == NULL) {
- cERROR(1, "Missing share name");
- rc = -ENODEV;
- goto out_fail;
- }
-
/*
* BB Do we need to wrap session_mutex around this TCon call and Unix
* SetFS as we do on SessSetup and reconnect?
@@ -2718,11 +2739,8 @@ cifs_match_super(struct super_block *sb, void *data)
struct cifs_ses *ses;
struct cifs_tcon *tcon;
struct tcon_link *tlink;
- struct sockaddr_storage addr;
int rc = 0;
- memset(&addr, 0, sizeof(struct sockaddr_storage));
-
spin_lock(&cifs_tcp_ses_lock);
cifs_sb = CIFS_SB(sb);
tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
@@ -2736,17 +2754,7 @@ cifs_match_super(struct super_block *sb, void *data)
volume_info = mnt_data->vol;
- if (!volume_info->UNCip || !volume_info->UNC)
- goto out;
-
- rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
- volume_info->UNCip,
- strlen(volume_info->UNCip),
- volume_info->port);
- if (!rc)
- goto out;
-
- if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
+ if (!match_server(tcp_srv, volume_info) ||
!match_session(ses, volume_info) ||
!match_tcon(tcon, volume_info->UNC)) {
rc = 0;
@@ -3261,8 +3269,6 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
{
kfree(volume_info->username);
kzfree(volume_info->password);
- if (volume_info->UNCip != volume_info->UNC + 2)
- kfree(volume_info->UNCip);
kfree(volume_info->UNC);
kfree(volume_info->domainname);
kfree(volume_info->iocharset);
@@ -3280,14 +3286,16 @@ cifs_cleanup_volume_info(struct smb_vol *volume_info)
#ifdef CONFIG_CIFS_DFS_UPCALL
-/* build_path_to_root returns full path to root when
- * we do not have an exiting connection (tcon) */
+/*
+ * cifs_build_path_to_root returns full path to root when we do not have an
+ * exiting connection (tcon)
+ */
static char *
build_unc_path_to_root(const struct smb_vol *vol,
const struct cifs_sb_info *cifs_sb)
{
char *full_path, *pos;
- unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
+ unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
@@ -3298,6 +3306,7 @@ build_unc_path_to_root(const struct smb_vol *vol,
pos = full_path + unc_len;
if (pplen) {
+ *pos++ = CIFS_DIR_SEP(cifs_sb);
strncpy(pos, vol->prepath, pplen);
pos += pplen;
}
@@ -3353,7 +3362,6 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
mdata = NULL;
} else {
cleanup_volume_info_contents(volume_info);
- memset(volume_info, '\0', sizeof(*volume_info));
rc = cifs_setup_volume_info(volume_info, mdata,
fake_devname);
}
@@ -3375,7 +3383,6 @@ cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
if (cifs_parse_mount_options(mount_data, devname, volume_info))
return -EINVAL;
-
if (volume_info->nullauth) {
cFYI(1, "Anonymous login");
kfree(volume_info->username);
@@ -3412,7 +3419,7 @@ cifs_get_volume_info(char *mount_data, const char *devname)
int rc;
struct smb_vol *volume_info;
- volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
+ volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
if (!volume_info)
return ERR_PTR(-ENOMEM);
@@ -3537,8 +3544,10 @@ remote_path_check:
rc = -ENOSYS;
goto mount_fail_check;
}
- /* build_path_to_root works only when we have a valid tcon */
- full_path = build_path_to_root(volume_info, cifs_sb, tcon);
+ /*
+ * cifs_build_path_to_root works only when we have a valid tcon
+ */
+ full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
if (full_path == NULL) {
rc = -ENOMEM;
goto mount_fail_check;
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 7c0a81283645..8719bbe0dcc3 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -44,6 +44,38 @@ renew_parental_timestamps(struct dentry *direntry)
} while (!IS_ROOT(direntry));
}
+char *
+cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
+ struct cifs_tcon *tcon)
+{
+ int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
+ int dfsplen;
+ char *full_path = NULL;
+
+ /* if no prefix path, simply set path to the root of share to "" */
+ if (pplen == 0) {
+ full_path = kzalloc(1, GFP_KERNEL);
+ return full_path;
+ }
+
+ if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
+ dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
+ else
+ dfsplen = 0;
+
+ full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
+ if (full_path == NULL)
+ return full_path;
+
+ if (dfsplen)
+ strncpy(full_path, tcon->treeName, dfsplen);
+ full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
+ strncpy(full_path + dfsplen + 1, vol->prepath, pplen);
+ convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
+ full_path[dfsplen + pplen] = 0; /* add trailing null */
+ return full_path;
+}
+
/* Note: caller must free return buffer */
char *
build_path_from_dentry(struct dentry *direntry)
@@ -398,7 +430,16 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
* in network traffic in the other paths.
*/
if (!(oflags & O_CREAT)) {
- struct dentry *res = cifs_lookup(inode, direntry, 0);
+ struct dentry *res;
+
+ /*
+ * Check for hashed negative dentry. We have already revalidated
+ * the dentry and it is fine. No need to perform another lookup.
+ */
+ if (!d_unhashed(direntry))
+ return -ENOENT;
+
+ res = cifs_lookup(inode, direntry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index edb25b4bbb95..8ea6ca50a665 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -238,6 +238,23 @@ out:
return rc;
}
+static bool
+cifs_has_mand_locks(struct cifsInodeInfo *cinode)
+{
+ struct cifs_fid_locks *cur;
+ bool has_locks = false;
+
+ down_read(&cinode->lock_sem);
+ list_for_each_entry(cur, &cinode->llist, llist) {
+ if (!list_empty(&cur->locks)) {
+ has_locks = true;
+ break;
+ }
+ }
+ up_read(&cinode->lock_sem);
+ return has_locks;
+}
+
struct cifsFileInfo *
cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct tcon_link *tlink, __u32 oplock)
@@ -248,6 +265,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct cifsFileInfo *cfile;
struct cifs_fid_locks *fdlocks;
struct cifs_tcon *tcon = tlink_tcon(tlink);
+ struct TCP_Server_Info *server = tcon->ses->server;
cfile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
if (cfile == NULL)
@@ -276,12 +294,22 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
INIT_WORK(&cfile->oplock_break, cifs_oplock_break);
mutex_init(&cfile->fh_mutex);
+ /*
+ * If the server returned a read oplock and we have mandatory brlocks,
+ * set oplock level to None.
+ */
+ if (oplock == server->vals->oplock_read &&
+ cifs_has_mand_locks(cinode)) {
+ cFYI(1, "Reset oplock val from read to None due to mand locks");
+ oplock = 0;
+ }
+
spin_lock(&cifs_file_list_lock);
- if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE)
+ if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock)
oplock = fid->pending_open->oplock;
list_del(&fid->pending_open->olist);
- tlink_tcon(tlink)->ses->server->ops->set_fid(cfile, fid, oplock);
+ server->ops->set_fid(cfile, fid, oplock);
list_add(&cfile->tlist, &tcon->openFileList);
/* if readable file instance put first in list*/
@@ -505,16 +533,36 @@ out:
return rc;
}
+static int cifs_push_posix_locks(struct cifsFileInfo *cfile);
+
/*
* Try to reacquire byte range locks that were released when session
- * to server was lost
+ * to server was lost.
*/
-static int cifs_relock_file(struct cifsFileInfo *cifsFile)
+static int
+cifs_relock_file(struct cifsFileInfo *cfile)
{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
+ struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
int rc = 0;
- /* BB list all locks open on this file and relock */
+ /* we are going to update can_cache_brlcks here - need a write access */
+ down_write(&cinode->lock_sem);
+ if (cinode->can_cache_brlcks) {
+ /* can cache locks - no need to push them */
+ up_write(&cinode->lock_sem);
+ return rc;
+ }
+
+ if (cap_unix(tcon->ses) &&
+ (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
+ ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+ rc = cifs_push_posix_locks(cfile);
+ else
+ rc = tcon->ses->server->ops->push_mand_locks(cfile);
+ up_write(&cinode->lock_sem);
return rc;
}
@@ -739,10 +787,15 @@ cifs_del_lock_waiters(struct cifsLockInfo *lock)
}
}
+#define CIFS_LOCK_OP 0
+#define CIFS_READ_OP 1
+#define CIFS_WRITE_OP 2
+
+/* @rw_check : 0 - no op, 1 - read, 2 - write */
static bool
cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
__u64 length, __u8 type, struct cifsFileInfo *cfile,
- struct cifsLockInfo **conf_lock, bool rw_check)
+ struct cifsLockInfo **conf_lock, int rw_check)
{
struct cifsLockInfo *li;
struct cifsFileInfo *cur_cfile = fdlocks->cfile;
@@ -752,9 +805,13 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
if (offset + length <= li->offset ||
offset >= li->offset + li->length)
continue;
- if (rw_check && server->ops->compare_fids(cfile, cur_cfile) &&
- current->tgid == li->pid)
- continue;
+ if (rw_check != CIFS_LOCK_OP && current->tgid == li->pid &&
+ server->ops->compare_fids(cfile, cur_cfile)) {
+ /* shared lock prevents write op through the same fid */
+ if (!(li->type & server->vals->shared_lock_type) ||
+ rw_check != CIFS_WRITE_OP)
+ continue;
+ }
if ((type & server->vals->shared_lock_type) &&
((server->ops->compare_fids(cfile, cur_cfile) &&
current->tgid == li->pid) || type == li->type))
@@ -769,7 +826,7 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset,
bool
cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
__u8 type, struct cifsLockInfo **conf_lock,
- bool rw_check)
+ int rw_check)
{
bool rc = false;
struct cifs_fid_locks *cur;
@@ -805,7 +862,7 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
down_read(&cinode->lock_sem);
exist = cifs_find_lock_conflict(cfile, offset, length, type,
- &conf_lock, false);
+ &conf_lock, CIFS_LOCK_OP);
if (exist) {
flock->fl_start = conf_lock->offset;
flock->fl_end = conf_lock->offset + conf_lock->length - 1;
@@ -852,7 +909,7 @@ try_again:
down_write(&cinode->lock_sem);
exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length,
- lock->type, &conf_lock, false);
+ lock->type, &conf_lock, CIFS_LOCK_OP);
if (!exist && cinode->can_cache_brlcks) {
list_add_tail(&lock->llist, &cfile->llist->locks);
up_write(&cinode->lock_sem);
@@ -948,7 +1005,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
int rc = 0, stored_rc;
struct cifsLockInfo *li, *tmp;
struct cifs_tcon *tcon;
- struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
unsigned int num, max_num, max_buf;
LOCKING_ANDX_RANGE *buf, *cur;
int types[] = {LOCKING_ANDX_LARGE_FILES,
@@ -958,21 +1014,12 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
xid = get_xid();
tcon = tlink_tcon(cfile->tlink);
- /* we are going to update can_cache_brlcks here - need a write access */
- down_write(&cinode->lock_sem);
- if (!cinode->can_cache_brlcks) {
- up_write(&cinode->lock_sem);
- free_xid(xid);
- return rc;
- }
-
/*
* Accessing maxBuf is racy with cifs_reconnect - need to store value
* and check it for zero before using.
*/
max_buf = tcon->ses->server->maxBuf;
if (!max_buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -EINVAL;
}
@@ -981,7 +1028,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
sizeof(LOCKING_ANDX_RANGE);
buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL);
if (!buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -ENOMEM;
}
@@ -1018,9 +1064,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
}
}
- cinode->can_cache_brlcks = false;
- up_write(&cinode->lock_sem);
-
kfree(buf);
free_xid(xid);
return rc;
@@ -1043,7 +1086,6 @@ struct lock_to_push {
static int
cifs_push_posix_locks(struct cifsFileInfo *cfile)
{
- struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
struct file_lock *flock, **before;
unsigned int count = 0, i = 0;
@@ -1054,14 +1096,6 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
xid = get_xid();
- /* we are going to update can_cache_brlcks here - need a write access */
- down_write(&cinode->lock_sem);
- if (!cinode->can_cache_brlcks) {
- up_write(&cinode->lock_sem);
- free_xid(xid);
- return rc;
- }
-
lock_flocks();
cifs_for_each_lock(cfile->dentry->d_inode, before) {
if ((*before)->fl_flags & FL_POSIX)
@@ -1127,9 +1161,6 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
}
out:
- cinode->can_cache_brlcks = false;
- up_write(&cinode->lock_sem);
-
free_xid(xid);
return rc;
err_out:
@@ -1144,14 +1175,27 @@ static int
cifs_push_locks(struct cifsFileInfo *cfile)
{
struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb);
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+ int rc = 0;
+
+ /* we are going to update can_cache_brlcks here - need a write access */
+ down_write(&cinode->lock_sem);
+ if (!cinode->can_cache_brlcks) {
+ up_write(&cinode->lock_sem);
+ return rc;
+ }
if (cap_unix(tcon->ses) &&
(CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
- return cifs_push_posix_locks(cfile);
+ rc = cifs_push_posix_locks(cfile);
+ else
+ rc = tcon->ses->server->ops->push_mand_locks(cfile);
- return tcon->ses->server->ops->push_mand_locks(cfile);
+ cinode->can_cache_brlcks = false;
+ up_write(&cinode->lock_sem);
+ return rc;
}
static void
@@ -1406,6 +1450,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
struct TCP_Server_Info *server = tcon->ses->server;
+ struct inode *inode = cfile->dentry->d_inode;
if (posix_lck) {
int posix_lock_type;
@@ -1436,16 +1481,33 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
return -ENOMEM;
rc = cifs_lock_add_if(cfile, lock, wait_flag);
- if (rc < 0)
+ if (rc < 0) {
kfree(lock);
- if (rc <= 0)
+ return rc;
+ }
+ if (!rc)
goto out;
+ /*
+ * Windows 7 server can delay breaking lease from read to None
+ * if we set a byte-range lock on a file - break it explicitly
+ * before sending the lock to the server to be sure the next
+ * read won't conflict with non-overlapted locks due to
+ * pagereading.
+ */
+ if (!CIFS_I(inode)->clientCanCacheAll &&
+ CIFS_I(inode)->clientCanCacheRead) {
+ cifs_invalidate_mapping(inode);
+ cFYI(1, "Set no oplock for inode=%p due to mand locks",
+ inode);
+ CIFS_I(inode)->clientCanCacheRead = false;
+ }
+
rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length,
type, 1, 0, wait_flag);
if (rc) {
kfree(lock);
- goto out;
+ return rc;
}
cifs_lock_add(cfile, lock);
@@ -1794,7 +1856,6 @@ static int cifs_writepages(struct address_space *mapping,
struct TCP_Server_Info *server;
struct page *page;
int rc = 0;
- loff_t isize = i_size_read(mapping->host);
/*
* If wsize is smaller than the page cache size, default to writing
@@ -1899,7 +1960,7 @@ retry:
*/
set_page_writeback(page);
- if (page_offset(page) >= isize) {
+ if (page_offset(page) >= i_size_read(mapping->host)) {
done = true;
unlock_page(page);
end_page_writeback(page);
@@ -1932,7 +1993,8 @@ retry:
wdata->offset = page_offset(wdata->pages[0]);
wdata->pagesz = PAGE_CACHE_SIZE;
wdata->tailsz =
- min(isize - page_offset(wdata->pages[nr_pages - 1]),
+ min(i_size_read(mapping->host) -
+ page_offset(wdata->pages[nr_pages - 1]),
(loff_t)PAGE_CACHE_SIZE);
wdata->bytes = ((nr_pages - 1) * PAGE_CACHE_SIZE) +
wdata->tailsz;
@@ -2457,7 +2519,7 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov,
down_read(&cinode->lock_sem);
if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs),
server->vals->exclusive_lock_type, NULL,
- true)) {
+ CIFS_WRITE_OP)) {
mutex_lock(&inode->i_mutex);
rc = __generic_file_aio_write(iocb, iov, nr_segs,
&iocb->ki_pos);
@@ -2487,42 +2549,34 @@ cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov,
struct cifsFileInfo *cfile = (struct cifsFileInfo *)
iocb->ki_filp->private_data;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
+ ssize_t written;
-#ifdef CONFIG_CIFS_SMB2
- /*
- * If we have an oplock for read and want to write a data to the file
- * we need to store it in the page cache and then push it to the server
- * to be sure the next read will get a valid data.
- */
- if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead) {
- ssize_t written;
- int rc;
-
- written = generic_file_aio_write(iocb, iov, nr_segs, pos);
- rc = filemap_fdatawrite(inode->i_mapping);
- if (rc)
- return (ssize_t)rc;
-
- return written;
+ if (cinode->clientCanCacheAll) {
+ if (cap_unix(tcon->ses) &&
+ (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))
+ && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
+ return generic_file_aio_write(iocb, iov, nr_segs, pos);
+ return cifs_writev(iocb, iov, nr_segs, pos);
}
-#endif
-
/*
* For non-oplocked files in strict cache mode we need to write the data
* to the server exactly from the pos to pos+len-1 rather than flush all
* affected pages because it may cause a error with mandatory locks on
* these pages but not on the region from pos to ppos+len-1.
*/
-
- if (!cinode->clientCanCacheAll)
- return cifs_user_writev(iocb, iov, nr_segs, pos);
-
- if (cap_unix(tcon->ses) &&
- (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) &&
- ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0))
- return generic_file_aio_write(iocb, iov, nr_segs, pos);
-
- return cifs_writev(iocb, iov, nr_segs, pos);
+ written = cifs_user_writev(iocb, iov, nr_segs, pos);
+ if (written > 0 && cinode->clientCanCacheRead) {
+ /*
+ * Windows 7 server can delay breaking level2 oplock if a write
+ * request comes - break it on the client to prevent reading
+ * an old data.
+ */
+ cifs_invalidate_mapping(inode);
+ cFYI(1, "Set no oplock for inode=%p after a write operation",
+ inode);
+ cinode->clientCanCacheRead = false;
+ }
+ return written;
}
static struct cifs_readdata *
@@ -2892,7 +2946,7 @@ cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov,
down_read(&cinode->lock_sem);
if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs),
tcon->ses->server->vals->shared_lock_type,
- NULL, true))
+ NULL, CIFS_READ_OP))
rc = generic_file_aio_read(iocb, iov, nr_segs, pos);
up_read(&cinode->lock_sem);
return rc;
@@ -3527,6 +3581,13 @@ void cifs_oplock_break(struct work_struct *work)
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
int rc = 0;
+ if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead &&
+ cifs_has_mand_locks(cinode)) {
+ cFYI(1, "Reset oplock to None for inode=%p due to mand locks",
+ inode);
+ cinode->clientCanCacheRead = false;
+ }
+
if (inode && S_ISREG(inode->i_mode)) {
if (cinode->clientCanCacheRead)
break_lease(inode, O_RDONLY);
@@ -3536,7 +3597,7 @@ void cifs_oplock_break(struct work_struct *work)
if (cinode->clientCanCacheRead == 0) {
rc = filemap_fdatawait(inode->i_mapping);
mapping_set_error(inode->i_mapping, rc);
- invalidate_remote_inode(inode);
+ cifs_invalidate_mapping(inode);
}
cFYI(1, "Oplock flush inode %p rc %d", inode, rc);
}
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index afdff79651f1..ed6208ff85a7 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1791,11 +1791,12 @@ int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
stat->ino = CIFS_I(inode)->uniqueid;
/*
- * If on a multiuser mount without unix extensions, and the admin hasn't
- * overridden them, set the ownership to the fsuid/fsgid of the current
- * process.
+ * If on a multiuser mount without unix extensions or cifsacl being
+ * enabled, and the admin hasn't overridden them, set the ownership
+ * to the fsuid/fsgid of the current process.
*/
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) &&
+ !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
!tcon->unix_ext) {
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID))
stat->uid = current_fsuid();
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index d5ce9e26696c..a82bc51fdc82 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -204,7 +204,7 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len)
return rc;
}
-int
+void
cifs_set_port(struct sockaddr *addr, const unsigned short int port)
{
switch (addr->sa_family) {
@@ -214,19 +214,7 @@ cifs_set_port(struct sockaddr *addr, const unsigned short int port)
case AF_INET6:
((struct sockaddr_in6 *)addr)->sin6_port = htons(port);
break;
- default:
- return 0;
}
- return 1;
-}
-
-int
-cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len,
- const unsigned short int port)
-{
- if (!cifs_convert_address(dst, src, len))
- return 0;
- return cifs_set_port(dst, port);
}
/*****************************************************************************
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index f9b5d3d6cf33..cdd6ff48246b 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -66,18 +66,21 @@ static inline void dump_cifs_file_struct(struct file *file, char *label)
#endif /* DEBUG2 */
/*
+ * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
+ *
* Find the dentry that matches "name". If there isn't one, create one. If it's
* a negative dentry or the uniqueid changed, then drop it and recreate it.
*/
-static struct dentry *
-cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
+static void
+cifs_prime_dcache(struct dentry *parent, struct qstr *name,
struct cifs_fattr *fattr)
{
struct dentry *dentry, *alias;
struct inode *inode;
struct super_block *sb = parent->d_inode->i_sb;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
- cFYI(1, "For %s", name->name);
+ cFYI(1, "%s: for %s", __func__, name->name);
if (parent->d_op && parent->d_op->d_hash)
parent->d_op->d_hash(parent, parent->d_inode, name);
@@ -86,35 +89,43 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
dentry = d_lookup(parent, name);
if (dentry) {
+ int err;
+
inode = dentry->d_inode;
- /* update inode in place if i_ino didn't change */
- if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
- cifs_fattr_to_inode(inode, fattr);
- return dentry;
+ if (inode) {
+ /*
+ * If we're generating inode numbers, then we don't
+ * want to clobber the existing one with the one that
+ * the readdir code created.
+ */
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
+ fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
+
+ /* update inode in place if i_ino didn't change */
+ if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
+ cifs_fattr_to_inode(inode, fattr);
+ goto out;
+ }
}
- d_drop(dentry);
+ err = d_invalidate(dentry);
dput(dentry);
+ if (err)
+ return;
}
dentry = d_alloc(parent, name);
- if (dentry == NULL)
- return NULL;
+ if (!dentry)
+ return;
inode = cifs_iget(sb, fattr);
- if (!inode) {
- dput(dentry);
- return NULL;
- }
+ if (!inode)
+ goto out;
alias = d_materialise_unique(dentry, inode);
- if (alias != NULL) {
- dput(dentry);
- if (IS_ERR(alias))
- return NULL;
- dentry = alias;
- }
-
- return dentry;
+ if (alias && !IS_ERR(alias))
+ dput(alias);
+out:
+ dput(dentry);
}
static void
@@ -134,6 +145,16 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
if (fattr->cf_cifsattrs & ATTR_READONLY)
fattr->cf_mode &= ~S_IWUGO;
+ /*
+ * We of course don't get ACL info in FIND_FIRST/NEXT results, so
+ * mark it for revalidation so that "ls -l" will look right. It might
+ * be super-slow, but if we don't do this then the ownership of files
+ * may look wrong since the inodes may not have timed out by the time
+ * "ls" does a stat() call on them.
+ */
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
+ fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
+
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
fattr->cf_cifsattrs & ATTR_SYSTEM) {
if (fattr->cf_eof == 0) {
@@ -649,7 +670,6 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct cifs_dirent de = { NULL, };
struct cifs_fattr fattr;
- struct dentry *dentry;
struct qstr name;
int rc = 0;
ino_t ino;
@@ -720,13 +740,11 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
*/
fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
- ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
- dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr);
+ cifs_prime_dcache(file->f_dentry, &name, &fattr);
+ ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
rc = filldir(dirent, name.name, name.len, file->f_pos, ino,
fattr.cf_dtype);
-
- dput(dentry);
return rc;
}
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 56cc4be87807..47bc5a87f94e 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -53,6 +53,13 @@ send_nt_cancel(struct TCP_Server_Info *server, void *buf,
mutex_unlock(&server->srv_mutex);
return rc;
}
+
+ /*
+ * The response to this call was already factored into the sequence
+ * number when the call went out, so we must adjust it back downward
+ * after signing here.
+ */
+ --server->sequence_number;
rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
mutex_unlock(&server->srv_mutex);
@@ -575,37 +582,6 @@ cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
}
-static char *
-cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
- struct cifs_tcon *tcon)
-{
- int pplen = vol->prepath ? strlen(vol->prepath) : 0;
- int dfsplen;
- char *full_path = NULL;
-
- /* if no prefix path, simply set path to the root of share to "" */
- if (pplen == 0) {
- full_path = kzalloc(1, GFP_KERNEL);
- return full_path;
- }
-
- if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
- dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
- else
- dfsplen = 0;
-
- full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
- if (full_path == NULL)
- return full_path;
-
- if (dfsplen)
- strncpy(full_path, tcon->treeName, dfsplen);
- strncpy(full_path + dfsplen, vol->prepath, pplen);
- convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
- full_path[dfsplen + pplen] = 0; /* add trailing null */
- return full_path;
-}
-
static void
cifs_clear_stats(struct cifs_tcon *tcon)
{
@@ -766,7 +742,6 @@ smb_set_file_info(struct inode *inode, const char *full_path,
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = NULL;
struct cifs_tcon *tcon;
- FILE_BASIC_INFO info_buf;
/* if the file is already open for write, just use that fileid */
open_file = find_writable_file(cinode, true);
@@ -817,7 +792,7 @@ smb_set_file_info(struct inode *inode, const char *full_path,
netpid = current->tgid;
set_via_filehandle:
- rc = CIFSSMBSetFileInfo(xid, tcon, &info_buf, netfid, netpid);
+ rc = CIFSSMBSetFileInfo(xid, tcon, buf, netfid, netpid);
if (!rc)
cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
@@ -944,7 +919,6 @@ struct smb_version_operations smb1_operations = {
.set_path_size = CIFSSMBSetEOF,
.set_file_size = CIFSSMBSetFileSize,
.set_file_info = smb_set_file_info,
- .build_path_to_root = cifs_build_path_to_root,
.echo = CIFSSMBEcho,
.mkdir = CIFSSMBMkDir,
.mkdir_setinfo = cifs_mkdir_setinfo,
@@ -985,4 +959,5 @@ struct smb_version_values smb1_values = {
.cap_unix = CAP_UNIX,
.cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
.cap_large_files = CAP_LARGE_FILES,
+ .oplock_read = OPLOCK_READ,
};
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index a93eec30a50d..71e6aed4b382 100644
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -260,13 +260,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
struct cifs_fid_locks *fdlocks;
xid = get_xid();
- /* we are going to update can_cache_brlcks here - need a write access */
- down_write(&cinode->lock_sem);
- if (!cinode->can_cache_brlcks) {
- up_write(&cinode->lock_sem);
- free_xid(xid);
- return rc;
- }
/*
* Accessing maxBuf is racy with cifs_reconnect - need to store value
@@ -274,7 +267,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
*/
max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf;
if (!max_buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -EINVAL;
}
@@ -282,7 +274,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
max_num = max_buf / sizeof(struct smb2_lock_element);
buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL);
if (!buf) {
- up_write(&cinode->lock_sem);
free_xid(xid);
return -ENOMEM;
}
@@ -293,10 +284,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile)
rc = stored_rc;
}
- cinode->can_cache_brlcks = false;
kfree(buf);
-
- up_write(&cinode->lock_sem);
free_xid(xid);
return rc;
}
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 4d9dbe0b7385..c9c7aa7ed966 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -262,23 +262,6 @@ smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
return rc;
}
-static char *
-smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
- struct cifs_tcon *tcon)
-{
- int pplen = vol->prepath ? strlen(vol->prepath) : 0;
- char *full_path = NULL;
-
- /* if no prefix path, simply set path to the root of share to "" */
- if (pplen == 0) {
- full_path = kzalloc(2, GFP_KERNEL);
- return full_path;
- }
-
- cERROR(1, "prefixpath is not supported for SMB2 now");
- return NULL;
-}
-
static bool
smb2_can_echo(struct TCP_Server_Info *server)
{
@@ -613,7 +596,6 @@ struct smb_version_operations smb21_operations = {
.set_path_size = smb2_set_path_size,
.set_file_size = smb2_set_file_size,
.set_file_info = smb2_set_file_info,
- .build_path_to_root = smb2_build_path_to_root,
.mkdir = smb2_mkdir,
.mkdir_setinfo = smb2_mkdir_setinfo,
.rmdir = smb2_rmdir,
@@ -641,6 +623,92 @@ struct smb_version_operations smb21_operations = {
.get_lease_key = smb2_get_lease_key,
.set_lease_key = smb2_set_lease_key,
.new_lease_key = smb2_new_lease_key,
+ .calc_signature = smb2_calc_signature,
+};
+
+
+struct smb_version_operations smb30_operations = {
+ .compare_fids = smb2_compare_fids,
+ .setup_request = smb2_setup_request,
+ .setup_async_request = smb2_setup_async_request,
+ .check_receive = smb2_check_receive,
+ .add_credits = smb2_add_credits,
+ .set_credits = smb2_set_credits,
+ .get_credits_field = smb2_get_credits_field,
+ .get_credits = smb2_get_credits,
+ .get_next_mid = smb2_get_next_mid,
+ .read_data_offset = smb2_read_data_offset,
+ .read_data_length = smb2_read_data_length,
+ .map_error = map_smb2_to_linux_error,
+ .find_mid = smb2_find_mid,
+ .check_message = smb2_check_message,
+ .dump_detail = smb2_dump_detail,
+ .clear_stats = smb2_clear_stats,
+ .print_stats = smb2_print_stats,
+ .is_oplock_break = smb2_is_valid_oplock_break,
+ .need_neg = smb2_need_neg,
+ .negotiate = smb2_negotiate,
+ .negotiate_wsize = smb2_negotiate_wsize,
+ .negotiate_rsize = smb2_negotiate_rsize,
+ .sess_setup = SMB2_sess_setup,
+ .logoff = SMB2_logoff,
+ .tree_connect = SMB2_tcon,
+ .tree_disconnect = SMB2_tdis,
+ .is_path_accessible = smb2_is_path_accessible,
+ .can_echo = smb2_can_echo,
+ .echo = SMB2_echo,
+ .query_path_info = smb2_query_path_info,
+ .get_srv_inum = smb2_get_srv_inum,
+ .query_file_info = smb2_query_file_info,
+ .set_path_size = smb2_set_path_size,
+ .set_file_size = smb2_set_file_size,
+ .set_file_info = smb2_set_file_info,
+ .mkdir = smb2_mkdir,
+ .mkdir_setinfo = smb2_mkdir_setinfo,
+ .rmdir = smb2_rmdir,
+ .unlink = smb2_unlink,
+ .rename = smb2_rename_path,
+ .create_hardlink = smb2_create_hardlink,
+ .open = smb2_open_file,
+ .set_fid = smb2_set_fid,
+ .close = smb2_close_file,
+ .flush = smb2_flush_file,
+ .async_readv = smb2_async_readv,
+ .async_writev = smb2_async_writev,
+ .sync_read = smb2_sync_read,
+ .sync_write = smb2_sync_write,
+ .query_dir_first = smb2_query_dir_first,
+ .query_dir_next = smb2_query_dir_next,
+ .close_dir = smb2_close_dir,
+ .calc_smb_size = smb2_calc_size,
+ .is_status_pending = smb2_is_status_pending,
+ .oplock_response = smb2_oplock_response,
+ .queryfs = smb2_queryfs,
+ .mand_lock = smb2_mand_lock,
+ .mand_unlock_range = smb2_unlock_range,
+ .push_mand_locks = smb2_push_mandatory_locks,
+ .get_lease_key = smb2_get_lease_key,
+ .set_lease_key = smb2_set_lease_key,
+ .new_lease_key = smb2_new_lease_key,
+ .calc_signature = smb3_calc_signature,
+};
+
+struct smb_version_values smb20_values = {
+ .version_string = SMB20_VERSION_STRING,
+ .protocol_id = SMB20_PROT_ID,
+ .req_capabilities = 0, /* MBZ */
+ .large_lock_type = 0,
+ .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
+ .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
+ .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+ .header_size = sizeof(struct smb2_hdr),
+ .max_header_size = MAX_SMB2_HDR_SIZE,
+ .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
+ .lock_cmd = SMB2_LOCK,
+ .cap_unix = 0,
+ .cap_nt_find = SMB2_NT_FIND,
+ .cap_large_files = SMB2_LARGE_FILES,
+ .oplock_read = SMB2_OPLOCK_LEVEL_II,
};
struct smb_version_values smb21_values = {
@@ -658,6 +726,7 @@ struct smb_version_values smb21_values = {
.cap_unix = 0,
.cap_nt_find = SMB2_NT_FIND,
.cap_large_files = SMB2_LARGE_FILES,
+ .oplock_read = SMB2_OPLOCK_LEVEL_II,
};
struct smb_version_values smb30_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index cf33622cdac8..41d9d0725f0f 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -425,7 +425,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
}
cFYI(1, "sec_flags 0x%x", sec_flags);
- if (sec_flags & CIFSSEC_MUST_SIGN) {
+ if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
cFYI(1, "Signing required");
if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED |
SMB2_NEGOTIATE_SIGNING_ENABLED))) {
@@ -612,7 +612,8 @@ ssetup_ntlmssp_authenticate:
/* BB add code to build os and lm fields */
- rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR);
+ rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
+ CIFS_LOG_ERROR | CIFS_NEG_OP);
kfree(security_blob);
rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 7d25f8b14f93..2aa3535e38ce 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -47,6 +47,10 @@ extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses,
struct smb_rqst *rqst);
extern struct mid_q_entry *smb2_setup_async_request(
struct TCP_Server_Info *server, struct smb_rqst *rqst);
+extern int smb2_calc_signature(struct smb_rqst *rqst,
+ struct TCP_Server_Info *server);
+extern int smb3_calc_signature(struct smb_rqst *rqst,
+ struct TCP_Server_Info *server);
extern void smb2_echo_request(struct work_struct *work);
extern __le32 smb2_get_lease_state(struct cifsInodeInfo *cinode);
extern __u8 smb2_map_lease_to_oplock(__le32 lease_state);
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 2a5fdf26f79f..8dd73e61d762 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -39,7 +39,7 @@
#include "smb2status.h"
#include "smb2glob.h"
-static int
+int
smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
{
int i, rc;
@@ -116,6 +116,13 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}
+int
+smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
+{
+ cFYI(1, "smb3 signatures not supported yet");
+ return -EOPNOTSUPP;
+}
+
/* must be called with server->srv_mutex held */
static int
smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
@@ -132,7 +139,7 @@ smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}
- rc = smb2_calc_signature(rqst, server);
+ rc = server->ops->calc_signature(rqst, server);
return rc;
}
@@ -168,7 +175,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
memset(smb2_pdu->Signature, 0, SMB2_SIGNATURE_SIZE);
mutex_lock(&server->srv_mutex);
- rc = smb2_calc_signature(rqst, server);
+ rc = server->ops->calc_signature(rqst, server);
mutex_unlock(&server->srv_mutex);
if (rc)
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 76d974c952fe..1a528680ec5a 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -144,9 +144,6 @@ smb_send_kvec(struct TCP_Server_Info *server, struct kvec *iov, size_t n_vec,
*sent = 0;
- if (ssocket == NULL)
- return -ENOTSOCK; /* BB eventually add reconnect code here */
-
smb_msg.msg_name = (struct sockaddr *) &server->dstaddr;
smb_msg.msg_namelen = sizeof(struct sockaddr);
smb_msg.msg_control = NULL;
@@ -291,6 +288,9 @@ smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst)
struct socket *ssocket = server->ssocket;
int val = 1;
+ if (ssocket == NULL)
+ return -ENOTSOCK;
+
cFYI(1, "Sending smb: smb_len=%u", smb_buf_length);
dump_smb(iov[0].iov_base, iov[0].iov_len);
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 4c6285fff598..e2f57a007029 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -844,6 +844,9 @@ COMPATIBLE_IOCTL(TIOCGDEV)
COMPATIBLE_IOCTL(TIOCCBRK)
COMPATIBLE_IOCTL(TIOCGSID)
COMPATIBLE_IOCTL(TIOCGICOUNT)
+COMPATIBLE_IOCTL(TIOCGPKT)
+COMPATIBLE_IOCTL(TIOCGPTLCK)
+COMPATIBLE_IOCTL(TIOCGEXCL)
/* Little t */
COMPATIBLE_IOCTL(TIOCGETD)
COMPATIBLE_IOCTL(TIOCSETD)
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 7414ae24a79b..712b10f64c70 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1613,12 +1613,12 @@ static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir
return 0;
}
-static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
+static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence)
{
struct dentry * dentry = file->f_path.dentry;
mutex_lock(&dentry->d_inode->i_mutex);
- switch (origin) {
+ switch (whence) {
case 1:
offset += file->f_pos;
case 0:
diff --git a/fs/coredump.c b/fs/coredump.c
index ce47379bfa61..177493272a61 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -458,7 +458,7 @@ static int umh_pipe_setup(struct subprocess_info *info, struct cred *new)
return err;
}
-void do_coredump(siginfo_t *siginfo, struct pt_regs *regs)
+void do_coredump(siginfo_t *siginfo)
{
struct core_state core_state;
struct core_name cn;
@@ -474,7 +474,7 @@ void do_coredump(siginfo_t *siginfo, struct pt_regs *regs)
static atomic_t core_dump_count = ATOMIC_INIT(0);
struct coredump_params cprm = {
.siginfo = siginfo,
- .regs = regs,
+ .regs = signal_pt_regs(),
.limit = rlimit(RLIMIT_CORE),
/*
* We must use the same mm->flags while dumping core to avoid
diff --git a/fs/dcache.c b/fs/dcache.c
index 3a463d0c4fe8..19153a0a810c 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -455,24 +455,6 @@ void d_drop(struct dentry *dentry)
EXPORT_SYMBOL(d_drop);
/*
- * d_clear_need_lookup - drop a dentry from cache and clear the need lookup flag
- * @dentry: dentry to drop
- *
- * This is called when we do a lookup on a placeholder dentry that needed to be
- * looked up. The dentry should have been hashed in order for it to be found by
- * the lookup code, but now needs to be unhashed while we do the actual lookup
- * and clear the DCACHE_NEED_LOOKUP flag.
- */
-void d_clear_need_lookup(struct dentry *dentry)
-{
- spin_lock(&dentry->d_lock);
- __d_drop(dentry);
- dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
- spin_unlock(&dentry->d_lock);
-}
-EXPORT_SYMBOL(d_clear_need_lookup);
-
-/*
* Finish off a dentry we've decided to kill.
* dentry->d_lock must be held, returns with it unlocked.
* If ref is non-zero, then decrement the refcount too.
@@ -565,13 +547,7 @@ repeat:
if (d_unhashed(dentry))
goto kill_it;
- /*
- * If this dentry needs lookup, don't set the referenced flag so that it
- * is more likely to be cleaned up by the dcache shrinker in case of
- * memory pressure.
- */
- if (!d_need_lookup(dentry))
- dentry->d_flags |= DCACHE_REFERENCED;
+ dentry->d_flags |= DCACHE_REFERENCED;
dentry_lru_add(dentry);
dentry->d_count--;
@@ -1583,7 +1559,7 @@ EXPORT_SYMBOL(d_find_any_alias);
*/
struct dentry *d_obtain_alias(struct inode *inode)
{
- static const struct qstr anonstring = { .name = "" };
+ static const struct qstr anonstring = QSTR_INIT("/", 1);
struct dentry *tmp;
struct dentry *res;
@@ -1737,13 +1713,6 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode,
}
/*
- * We are going to instantiate this dentry, unhash it and clear the
- * lookup flag so we can do that.
- */
- if (unlikely(d_need_lookup(found)))
- d_clear_need_lookup(found);
-
- /*
* Negative dentry: instantiate it unless the inode is a directory and
* already has a dentry.
*/
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index b607d92cdf24..a5f12b7e228d 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -59,7 +59,6 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev
case S_IFDIR:
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
- inode->i_private = NULL;
/* directory inodes start off with i_nlink == 2
* (for "." entry) */
@@ -177,7 +176,7 @@ static int debugfs_parse_options(char *data, struct debugfs_mount_opts *opts)
opts->uid = uid;
break;
case Opt_gid:
- if (match_octal(&args[0], &option))
+ if (match_int(&args[0], &option))
return -EINVAL;
gid = make_kgid(current_user_ns(), option);
if (!gid_valid(gid))
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 14afbabe6546..472e6befc54d 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -545,37 +545,38 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx)
mutex_unlock(&allocated_ptys_lock);
}
-int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
+/**
+ * devpts_pty_new -- create a new inode in /dev/pts/
+ * @ptmx_inode: inode of the master
+ * @device: major+minor of the node to be created
+ * @index: used as a name of the node
+ * @priv: what's given back by devpts_get_priv
+ *
+ * The created inode is returned. Remove it from /dev/pts/ by devpts_pty_kill.
+ */
+struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
+ void *priv)
{
- /* tty layer puts index from devpts_new_index() in here */
- int number = tty->index;
- struct tty_driver *driver = tty->driver;
- dev_t device = MKDEV(driver->major, driver->minor_start+number);
struct dentry *dentry;
struct super_block *sb = pts_sb_from_inode(ptmx_inode);
- struct inode *inode = new_inode(sb);
+ struct inode *inode;
struct dentry *root = sb->s_root;
struct pts_fs_info *fsi = DEVPTS_SB(sb);
struct pts_mount_opts *opts = &fsi->mount_opts;
- int ret = 0;
char s[12];
- /* We're supposed to be given the slave end of a pty */
- BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
- BUG_ON(driver->subtype != PTY_TYPE_SLAVE);
-
+ inode = new_inode(sb);
if (!inode)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
- inode->i_ino = number + 3;
+ inode->i_ino = index + 3;
inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
init_special_inode(inode, S_IFCHR|opts->mode, device);
- inode->i_private = tty;
- tty->driver_data = inode;
+ inode->i_private = priv;
- sprintf(s, "%d", number);
+ sprintf(s, "%d", index);
mutex_lock(&root->d_inode->i_mutex);
@@ -585,18 +586,24 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
fsnotify_create(root->d_inode, dentry);
} else {
iput(inode);
- ret = -ENOMEM;
+ inode = ERR_PTR(-ENOMEM);
}
mutex_unlock(&root->d_inode->i_mutex);
- return ret;
+ return inode;
}
-struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
+/**
+ * devpts_get_priv -- get private data for a slave
+ * @pts_inode: inode of the slave
+ *
+ * Returns whatever was passed as priv in devpts_pty_new for a given inode.
+ */
+void *devpts_get_priv(struct inode *pts_inode)
{
struct dentry *dentry;
- struct tty_struct *tty;
+ void *priv = NULL;
BUG_ON(pts_inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR));
@@ -605,18 +612,22 @@ struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
if (!dentry)
return NULL;
- tty = NULL;
if (pts_inode->i_sb->s_magic == DEVPTS_SUPER_MAGIC)
- tty = (struct tty_struct *)pts_inode->i_private;
+ priv = pts_inode->i_private;
dput(dentry);
- return tty;
+ return priv;
}
-void devpts_pty_kill(struct tty_struct *tty)
+/**
+ * devpts_pty_kill -- remove inode form /dev/pts/
+ * @inode: inode of the slave to be removed
+ *
+ * This is an inverse operation of devpts_pty_new.
+ */
+void devpts_pty_kill(struct inode *inode)
{
- struct inode *inode = tty->driver_data;
struct super_block *sb = pts_sb_from_inode(inode);
struct dentry *root = sb->s_root;
struct dentry *dentry;
diff --git a/fs/direct-io.c b/fs/direct-io.c
index f86c720dba0e..cf5b44b10c67 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -540,6 +540,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
sector_t fs_endblk; /* Into file, in filesystem-sized blocks */
unsigned long fs_count; /* Number of filesystem-sized blocks */
int create;
+ unsigned int i_blkbits = sdio->blkbits + sdio->blkfactor;
/*
* If there was a memory error and we've overwritten all the
@@ -554,7 +555,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
fs_count = fs_endblk - fs_startblk + 1;
map_bh->b_state = 0;
- map_bh->b_size = fs_count << dio->inode->i_blkbits;
+ map_bh->b_size = fs_count << i_blkbits;
/*
* For writes inside i_size on a DIO_SKIP_HOLES filesystem we
@@ -1053,7 +1054,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
int seg;
size_t size;
unsigned long addr;
- unsigned blkbits = inode->i_blkbits;
+ unsigned i_blkbits = ACCESS_ONCE(inode->i_blkbits);
+ unsigned blkbits = i_blkbits;
unsigned blocksize_mask = (1 << blkbits) - 1;
ssize_t retval = -EINVAL;
loff_t end = offset;
@@ -1149,7 +1151,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
dio->inode = inode;
dio->rw = rw;
sdio.blkbits = blkbits;
- sdio.blkfactor = inode->i_blkbits - blkbits;
+ sdio.blkfactor = i_blkbits - blkbits;
sdio.block_in_file = offset >> blkbits;
sdio.get_block = get_block;
diff --git a/fs/dlm/Kconfig b/fs/dlm/Kconfig
index 1897eb1b4b6a..e4242c3f8486 100644
--- a/fs/dlm/Kconfig
+++ b/fs/dlm/Kconfig
@@ -1,6 +1,6 @@
menuconfig DLM
tristate "Distributed Lock Manager (DLM)"
- depends on EXPERIMENTAL && INET
+ depends on INET
depends on SYSFS && CONFIGFS_FS && (IPV6 || IPV6=n)
select IP_SCTP
help
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 871c1abf6029..77c0f70f8fe8 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -337,6 +337,7 @@ enum rsb_flags {
RSB_NEW_MASTER2,
RSB_RECOVER_CONVERT,
RSB_RECOVER_GRANT,
+ RSB_RECOVER_LVB_INVAL,
};
static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index b56950758188..a579f30f237d 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -5393,6 +5393,13 @@ static void purge_dead_list(struct dlm_ls *ls, struct dlm_rsb *r,
if ((lkb->lkb_nodeid == nodeid_gone) ||
dlm_is_removed(ls, lkb->lkb_nodeid)) {
+ /* tell recover_lvb to invalidate the lvb
+ because a node holding EX/PW failed */
+ if ((lkb->lkb_exflags & DLM_LKF_VALBLK) &&
+ (lkb->lkb_grmode >= DLM_LOCK_PW)) {
+ rsb_set_flag(r, RSB_RECOVER_LVB_INVAL);
+ }
+
del_lkb(r, lkb);
/* this put should free the lkb */
@@ -6025,15 +6032,18 @@ static int orphan_proc_lock(struct dlm_ls *ls, struct dlm_lkb *lkb)
return error;
}
-/* The force flag allows the unlock to go ahead even if the lkb isn't granted.
- Regardless of what rsb queue the lock is on, it's removed and freed. */
+/* The FORCEUNLOCK flag allows the unlock to go ahead even if the lkb isn't
+ granted. Regardless of what rsb queue the lock is on, it's removed and
+ freed. The IVVALBLK flag causes the lvb on the resource to be invalidated
+ if our lock is PW/EX (it's ignored if our granted mode is smaller.) */
static int unlock_proc_lock(struct dlm_ls *ls, struct dlm_lkb *lkb)
{
struct dlm_args args;
int error;
- set_unlock_args(DLM_LKF_FORCEUNLOCK, lkb->lkb_ua, &args);
+ set_unlock_args(DLM_LKF_FORCEUNLOCK | DLM_LKF_IVVALBLK,
+ lkb->lkb_ua, &args);
error = unlock_lock(ls, lkb, &args);
if (error == -DLM_EUNLOCK)
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 331ea4f94efd..dd87a31bcc21 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1385,7 +1385,6 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc)
struct connection *con;
struct writequeue_entry *e;
int offset = 0;
- int users = 0;
con = nodeid2con(nodeid, allocation);
if (!con)
@@ -1399,7 +1398,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc)
} else {
offset = e->end;
e->end += len;
- users = e->users++;
+ e->users++;
}
spin_unlock(&con->writequeue_lock);
@@ -1414,7 +1413,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc)
spin_lock(&con->writequeue_lock);
offset = e->end;
e->end += len;
- users = e->users++;
+ e->users++;
list_add_tail(&e->list, &con->writequeue);
spin_unlock(&con->writequeue_lock);
goto got_one;
diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index 4a7a76e42fc3..aedea28a86a1 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -717,8 +717,14 @@ void dlm_recovered_lock(struct dlm_rsb *r)
* the VALNOTVALID flag if necessary, and determining the correct lvb contents
* based on the lvb's of the locks held on the rsb.
*
- * RSB_VALNOTVALID is set if there are only NL/CR locks on the rsb. If it
- * was already set prior to recovery, it's not cleared, regardless of locks.
+ * RSB_VALNOTVALID is set in two cases:
+ *
+ * 1. we are master, but not new, and we purged an EX/PW lock held by a
+ * failed node (in dlm_recover_purge which set RSB_RECOVER_LVB_INVAL)
+ *
+ * 2. we are a new master, and there are only NL/CR locks left.
+ * (We could probably improve this by only invaliding in this way when
+ * the previous master left uncleanly. VMS docs mention that.)
*
* The LVB contents are only considered for changing when this is a new master
* of the rsb (NEW_MASTER2). Then, the rsb's lvb is taken from any lkb with
@@ -734,6 +740,19 @@ static void recover_lvb(struct dlm_rsb *r)
int big_lock_exists = 0;
int lvblen = r->res_ls->ls_lvblen;
+ if (!rsb_flag(r, RSB_NEW_MASTER2) &&
+ rsb_flag(r, RSB_RECOVER_LVB_INVAL)) {
+ /* case 1 above */
+ rsb_set_flag(r, RSB_VALNOTVALID);
+ return;
+ }
+
+ if (!rsb_flag(r, RSB_NEW_MASTER2))
+ return;
+
+ /* we are the new master, so figure out if VALNOTVALID should
+ be set, and set the rsb lvb from the best lkb available. */
+
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) {
if (!(lkb->lkb_exflags & DLM_LKF_VALBLK))
continue;
@@ -772,13 +791,10 @@ static void recover_lvb(struct dlm_rsb *r)
if (!lock_lvb_exists)
goto out;
+ /* lvb is invalidated if only NL/CR locks remain */
if (!big_lock_exists)
rsb_set_flag(r, RSB_VALNOTVALID);
- /* don't mess with the lvb unless we're the new master */
- if (!rsb_flag(r, RSB_NEW_MASTER2))
- goto out;
-
if (!r->res_lvbptr) {
r->res_lvbptr = dlm_allocate_lvb(r->res_ls);
if (!r->res_lvbptr)
@@ -852,12 +868,19 @@ void dlm_recover_rsbs(struct dlm_ls *ls)
if (is_master(r)) {
if (rsb_flag(r, RSB_RECOVER_CONVERT))
recover_conversion(r);
+
+ /* recover lvb before granting locks so the updated
+ lvb/VALNOTVALID is presented in the completion */
+ recover_lvb(r);
+
if (rsb_flag(r, RSB_NEW_MASTER2))
recover_grant(r);
- recover_lvb(r);
count++;
+ } else {
+ rsb_clear_flag(r, RSB_VALNOTVALID);
}
rsb_clear_flag(r, RSB_RECOVER_CONVERT);
+ rsb_clear_flag(r, RSB_RECOVER_LVB_INVAL);
rsb_clear_flag(r, RSB_NEW_MASTER2);
unlock_rsb(r);
}
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index ea9931281557..a7b0c2dfb3db 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1935,7 +1935,7 @@ static const unsigned char filename_rev_map[256] = {
* @src: Source location for the filename to encode
* @src_size: Size of the source in bytes
*/
-void ecryptfs_encode_for_filename(unsigned char *dst, size_t *dst_size,
+static void ecryptfs_encode_for_filename(unsigned char *dst, size_t *dst_size,
unsigned char *src, size_t src_size)
{
size_t num_blocks;
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index 809e67d05ca3..f1ea610362c6 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -102,12 +102,12 @@ int __init ecryptfs_init_kthread(void)
void ecryptfs_destroy_kthread(void)
{
- struct ecryptfs_open_req *req;
+ struct ecryptfs_open_req *req, *tmp;
mutex_lock(&ecryptfs_kthread_ctl.mux);
ecryptfs_kthread_ctl.flags |= ECRYPTFS_KTHREAD_ZOMBIE;
- list_for_each_entry(req, &ecryptfs_kthread_ctl.req_list,
- kthread_ctl_list) {
+ list_for_each_entry_safe(req, tmp, &ecryptfs_kthread_ctl.req_list,
+ kthread_ctl_list) {
list_del(&req->kthread_ctl_list);
*req->lower_file = ERR_PTR(-EIO);
complete(&req->done);
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index bd1d57f98f74..564a1fa34b99 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -338,7 +338,8 @@ static int ecryptfs_write_begin(struct file *file,
if (prev_page_end_size
>= i_size_read(page->mapping->host)) {
zero_user(page, 0, PAGE_CACHE_SIZE);
- } else {
+ SetPageUptodate(page);
+ } else if (len < PAGE_CACHE_SIZE) {
rc = ecryptfs_decrypt_page(page);
if (rc) {
printk(KERN_ERR "%s: Error decrypting "
@@ -348,8 +349,8 @@ static int ecryptfs_write_begin(struct file *file,
ClearPageUptodate(page);
goto out;
}
+ SetPageUptodate(page);
}
- SetPageUptodate(page);
}
}
/* If creating a page or more of holes, zero them out via truncate.
@@ -499,6 +500,13 @@ static int ecryptfs_write_end(struct file *file,
}
goto out;
}
+ if (!PageUptodate(page)) {
+ if (copied < PAGE_CACHE_SIZE) {
+ rc = 0;
+ goto out;
+ }
+ SetPageUptodate(page);
+ }
/* Fills in zeros if 'to' goes beyond inode size */
rc = fill_zeros_to_end_of_page(page, to);
if (rc) {
diff --git a/fs/eventfd.c b/fs/eventfd.c
index d81b9f654086..35470d9b96e6 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -19,6 +19,8 @@
#include <linux/export.h>
#include <linux/kref.h>
#include <linux/eventfd.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
struct eventfd_ctx {
struct kref kref;
@@ -284,7 +286,25 @@ static ssize_t eventfd_write(struct file *file, const char __user *buf, size_t c
return res;
}
+#ifdef CONFIG_PROC_FS
+static int eventfd_show_fdinfo(struct seq_file *m, struct file *f)
+{
+ struct eventfd_ctx *ctx = f->private_data;
+ int ret;
+
+ spin_lock_irq(&ctx->wqh.lock);
+ ret = seq_printf(m, "eventfd-count: %16llx\n",
+ (unsigned long long)ctx->count);
+ spin_unlock_irq(&ctx->wqh.lock);
+
+ return ret;
+}
+#endif
+
static const struct file_operations eventfd_fops = {
+#ifdef CONFIG_PROC_FS
+ .show_fdinfo = eventfd_show_fdinfo,
+#endif
.release = eventfd_release,
.poll = eventfd_poll,
.read = eventfd_read,
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index da72250ddc1c..9fec1836057a 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -38,6 +38,8 @@
#include <asm/io.h>
#include <asm/mman.h>
#include <linux/atomic.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
/*
* LOCKING:
@@ -346,7 +348,7 @@ static inline struct epitem *ep_item_from_epqueue(poll_table *p)
/* Tells if the epoll_ctl(2) operation needs an event copy from userspace */
static inline int ep_op_has_event(int op)
{
- return op == EPOLL_CTL_ADD || op == EPOLL_CTL_MOD;
+ return op != EPOLL_CTL_DEL;
}
/* Initialize the poll safe wake up structure */
@@ -676,34 +678,6 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi)
return 0;
}
-/*
- * Disables a "struct epitem" in the eventpoll set. Returns -EBUSY if the item
- * had no event flags set, indicating that another thread may be currently
- * handling that item's events (in the case that EPOLLONESHOT was being
- * used). Otherwise a zero result indicates that the item has been disabled
- * from receiving events. A disabled item may be re-enabled via
- * EPOLL_CTL_MOD. Must be called with "mtx" held.
- */
-static int ep_disable(struct eventpoll *ep, struct epitem *epi)
-{
- int result = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&ep->lock, flags);
- if (epi->event.events & ~EP_PRIVATE_BITS) {
- if (ep_is_linked(&epi->rdllink))
- list_del_init(&epi->rdllink);
- /* Ensure ep_poll_callback will not add epi back onto ready
- list: */
- epi->event.events &= EP_PRIVATE_BITS;
- }
- else
- result = -EBUSY;
- spin_unlock_irqrestore(&ep->lock, flags);
-
- return result;
-}
-
static void ep_free(struct eventpoll *ep)
{
struct rb_node *rbp;
@@ -811,8 +785,34 @@ static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait)
return pollflags != -1 ? pollflags : 0;
}
+#ifdef CONFIG_PROC_FS
+static int ep_show_fdinfo(struct seq_file *m, struct file *f)
+{
+ struct eventpoll *ep = f->private_data;
+ struct rb_node *rbp;
+ int ret = 0;
+
+ mutex_lock(&ep->mtx);
+ for (rbp = rb_first(&ep->rbr); rbp; rbp = rb_next(rbp)) {
+ struct epitem *epi = rb_entry(rbp, struct epitem, rbn);
+
+ ret = seq_printf(m, "tfd: %8d events: %8x data: %16llx\n",
+ epi->ffd.fd, epi->event.events,
+ (long long)epi->event.data);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&ep->mtx);
+
+ return ret;
+}
+#endif
+
/* File callbacks that implement the eventpoll file behaviour */
static const struct file_operations eventpoll_fops = {
+#ifdef CONFIG_PROC_FS
+ .show_fdinfo = ep_show_fdinfo,
+#endif
.release = ep_eventpoll_release,
.poll = ep_eventpoll_poll,
.llseek = noop_llseek,
@@ -1048,6 +1048,8 @@ static void ep_rbtree_insert(struct eventpoll *ep, struct epitem *epi)
rb_insert_color(&epi->rbn, &ep->rbr);
}
+
+
#define PATH_ARR_SIZE 5
/*
* These are the number paths of length 1 to 5, that we are allowing to emanate
@@ -1311,7 +1313,7 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even
* otherwise we might miss an event that happens between the
* f_op->poll() call and the new event set registering.
*/
- epi->event.events = event->events;
+ epi->event.events = event->events; /* need barrier below */
pt._key = event->events;
epi->event.data = event->data; /* protected by mtx */
if (epi->event.events & EPOLLWAKEUP) {
@@ -1322,6 +1324,26 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even
}
/*
+ * The following barrier has two effects:
+ *
+ * 1) Flush epi changes above to other CPUs. This ensures
+ * we do not miss events from ep_poll_callback if an
+ * event occurs immediately after we call f_op->poll().
+ * We need this because we did not take ep->lock while
+ * changing epi above (but ep_poll_callback does take
+ * ep->lock).
+ *
+ * 2) We also need to ensure we do not miss _past_ events
+ * when calling f_op->poll(). This barrier also
+ * pairs with the barrier in wq_has_sleeper (see
+ * comments for wq_has_sleeper).
+ *
+ * This barrier will now guarantee ep_poll_callback or f_op->poll
+ * (or both) will notice the readiness of an item.
+ */
+ smp_mb();
+
+ /*
* Get current event bits. We can safely use the file* here because
* its usage count has been increased by the caller of this function.
*/
@@ -1813,12 +1835,6 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
} else
error = -ENOENT;
break;
- case EPOLL_CTL_DISABLE:
- if (epi)
- error = ep_disable(ep, epi);
- else
- error = -ENOENT;
- break;
}
mutex_unlock(&ep->mtx);
diff --git a/fs/exec.c b/fs/exec.c
index 0039055b1fc6..20df02c1cc70 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -434,8 +434,9 @@ static int count(struct user_arg_ptr argv, int max)
if (IS_ERR(p))
return -EFAULT;
- if (i++ >= max)
+ if (i >= max)
return -E2BIG;
+ ++i;
if (fatal_signal_pending(current))
return -ERESTARTNOHAND;
@@ -1175,9 +1176,24 @@ void free_bprm(struct linux_binprm *bprm)
mutex_unlock(&current->signal->cred_guard_mutex);
abort_creds(bprm->cred);
}
+ /* If a binfmt changed the interp, free it. */
+ if (bprm->interp != bprm->filename)
+ kfree(bprm->interp);
kfree(bprm);
}
+int bprm_change_interp(char *interp, struct linux_binprm *bprm)
+{
+ /* If a binfmt changed the interp, free it first. */
+ if (bprm->interp != bprm->filename)
+ kfree(bprm->interp);
+ bprm->interp = kstrdup(interp, GFP_KERNEL);
+ if (!bprm->interp)
+ return -ENOMEM;
+ return 0;
+}
+EXPORT_SYMBOL(bprm_change_interp);
+
/*
* install the new credentials for this executable
*/
@@ -1266,14 +1282,13 @@ int prepare_binprm(struct linux_binprm *bprm)
bprm->cred->egid = current_egid();
if (!(bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID) &&
- !current->no_new_privs) {
+ !current->no_new_privs &&
+ kuid_has_mapping(bprm->cred->user_ns, inode->i_uid) &&
+ kgid_has_mapping(bprm->cred->user_ns, inode->i_gid)) {
/* Set-uid? */
if (mode & S_ISUID) {
- if (!kuid_has_mapping(bprm->cred->user_ns, inode->i_uid))
- return -EPERM;
bprm->per_clear |= PER_CLEAR_ON_SETID;
bprm->cred->euid = inode->i_uid;
-
}
/* Set-gid? */
@@ -1283,8 +1298,6 @@ int prepare_binprm(struct linux_binprm *bprm)
* executable.
*/
if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
- if (!kgid_has_mapping(bprm->cred->user_ns, inode->i_gid))
- return -EPERM;
bprm->per_clear |= PER_CLEAR_ON_SETID;
bprm->cred->egid = inode->i_gid;
}
@@ -1349,13 +1362,17 @@ EXPORT_SYMBOL(remove_arg_zero);
/*
* cycle the list of binary formats handler, until one recognizes the image
*/
-int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs)
+int search_binary_handler(struct linux_binprm *bprm)
{
unsigned int depth = bprm->recursion_depth;
int try,retval;
struct linux_binfmt *fmt;
pid_t old_pid, old_vpid;
+ /* This allows 4 levels of binfmt rewrites before failing hard. */
+ if (depth > 5)
+ return -ELOOP;
+
retval = security_bprm_check(bprm);
if (retval)
return retval;
@@ -1374,18 +1391,14 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs)
for (try=0; try<2; try++) {
read_lock(&binfmt_lock);
list_for_each_entry(fmt, &formats, lh) {
- int (*fn)(struct linux_binprm *, struct pt_regs *) = fmt->load_binary;
+ int (*fn)(struct linux_binprm *) = fmt->load_binary;
if (!fn)
continue;
if (!try_module_get(fmt->module))
continue;
read_unlock(&binfmt_lock);
- retval = fn(bprm, regs);
- /*
- * Restore the depth counter to its starting value
- * in this call, so we don't have to rely on every
- * load_binary function to restore it on return.
- */
+ bprm->recursion_depth = depth + 1;
+ retval = fn(bprm);
bprm->recursion_depth = depth;
if (retval >= 0) {
if (depth == 0) {
@@ -1439,8 +1452,7 @@ EXPORT_SYMBOL(search_binary_handler);
*/
static int do_execve_common(const char *filename,
struct user_arg_ptr argv,
- struct user_arg_ptr envp,
- struct pt_regs *regs)
+ struct user_arg_ptr envp)
{
struct linux_binprm *bprm;
struct file *file;
@@ -1524,7 +1536,7 @@ static int do_execve_common(const char *filename,
if (retval < 0)
goto out;
- retval = search_binary_handler(bprm,regs);
+ retval = search_binary_handler(bprm);
if (retval < 0)
goto out;
@@ -1566,19 +1578,17 @@ out_ret:
int do_execve(const char *filename,
const char __user *const __user *__argv,
- const char __user *const __user *__envp,
- struct pt_regs *regs)
+ const char __user *const __user *__envp)
{
struct user_arg_ptr argv = { .ptr.native = __argv };
struct user_arg_ptr envp = { .ptr.native = __envp };
- return do_execve_common(filename, argv, envp, regs);
+ return do_execve_common(filename, argv, envp);
}
#ifdef CONFIG_COMPAT
-int compat_do_execve(const char *filename,
+static int compat_do_execve(const char *filename,
const compat_uptr_t __user *__argv,
- const compat_uptr_t __user *__envp,
- struct pt_regs *regs)
+ const compat_uptr_t __user *__envp)
{
struct user_arg_ptr argv = {
.is_compat = true,
@@ -1588,7 +1598,7 @@ int compat_do_execve(const char *filename,
.is_compat = true,
.ptr.compat = __envp,
};
- return do_execve_common(filename, argv, envp, regs);
+ return do_execve_common(filename, argv, envp);
}
#endif
@@ -1660,7 +1670,6 @@ int get_dumpable(struct mm_struct *mm)
return __get_dumpable(mm->flags);
}
-#ifdef __ARCH_WANT_SYS_EXECVE
SYSCALL_DEFINE3(execve,
const char __user *, filename,
const char __user *const __user *, argv,
@@ -1669,7 +1678,7 @@ SYSCALL_DEFINE3(execve,
struct filename *path = getname(filename);
int error = PTR_ERR(path);
if (!IS_ERR(path)) {
- error = do_execve(path->name, argv, envp, current_pt_regs());
+ error = do_execve(path->name, argv, envp);
putname(path);
}
return error;
@@ -1682,33 +1691,9 @@ asmlinkage long compat_sys_execve(const char __user * filename,
struct filename *path = getname(filename);
int error = PTR_ERR(path);
if (!IS_ERR(path)) {
- error = compat_do_execve(path->name, argv, envp,
- current_pt_regs());
+ error = compat_do_execve(path->name, argv, envp);
putname(path);
}
return error;
}
#endif
-#endif
-
-#ifdef __ARCH_WANT_KERNEL_EXECVE
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- struct pt_regs *p = current_pt_regs();
- int ret;
-
- ret = do_execve(filename,
- (const char __user *const __user *)argv,
- (const char __user *const __user *)envp, p);
- if (ret < 0)
- return ret;
-
- /*
- * We were successful. We won't be returning to our caller, but
- * instead to user space by manipulating the kernel stack.
- */
- ret_from_kernel_execve(p);
-}
-#endif
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index b56181047751..d1f80abd8828 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -361,12 +361,12 @@ static int read_exec(struct page_collect *pcol)
return 0;
err:
- if (!pcol->read_4_write)
- _unlock_pcol_pages(pcol, ret, READ);
-
- pcol_free(pcol);
-
+ if (!pcol_copy) /* Failed before ownership transfer */
+ pcol_copy = pcol;
+ _unlock_pcol_pages(pcol_copy, ret, READ);
+ pcol_free(pcol_copy);
kfree(pcol_copy);
+
return ret;
}
@@ -676,8 +676,10 @@ static int write_exec(struct page_collect *pcol)
return 0;
err:
- _unlock_pcol_pages(pcol, ret, WRITE);
- pcol_free(pcol);
+ if (!pcol_copy) /* Failed before ownership transfer */
+ pcol_copy = pcol;
+ _unlock_pcol_pages(pcol_copy, ret, WRITE);
+ pcol_free(pcol_copy);
kfree(pcol_copy);
return ret;
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 29ab099e3e08..5df4bb4aab14 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -322,10 +322,10 @@ static int export_encode_fh(struct inode *inode, struct fid *fid,
if (parent && (len < 4)) {
*max_len = 4;
- return 255;
+ return FILEID_INVALID;
} else if (len < 2) {
*max_len = 2;
- return 255;
+ return FILEID_INVALID;
}
len = 2;
@@ -341,10 +341,21 @@ static int export_encode_fh(struct inode *inode, struct fid *fid,
return type;
}
+int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid,
+ int *max_len, struct inode *parent)
+{
+ const struct export_operations *nop = inode->i_sb->s_export_op;
+
+ if (nop && nop->encode_fh)
+ return nop->encode_fh(inode, fid->raw, max_len, parent);
+
+ return export_encode_fh(inode, fid, max_len, parent);
+}
+EXPORT_SYMBOL_GPL(exportfs_encode_inode_fh);
+
int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len,
int connectable)
{
- const struct export_operations *nop = dentry->d_sb->s_export_op;
int error;
struct dentry *p = NULL;
struct inode *inode = dentry->d_inode, *parent = NULL;
@@ -357,10 +368,8 @@ int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len,
*/
parent = p->d_inode;
}
- if (nop->encode_fh)
- error = nop->encode_fh(inode, fid->raw, max_len, parent);
- else
- error = export_encode_fh(inode, fid, max_len, parent);
+
+ error = exportfs_encode_inode_fh(inode, fid, max_len, parent);
dput(p);
return error;
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index 7320a66e958f..22548f56197b 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -2101,8 +2101,9 @@ int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range)
end = start + (range->len >> sb->s_blocksize_bits) - 1;
minlen = range->minlen >> sb->s_blocksize_bits;
- if (unlikely(minlen > EXT3_BLOCKS_PER_GROUP(sb)) ||
- unlikely(start >= max_blks))
+ if (minlen > EXT3_BLOCKS_PER_GROUP(sb) ||
+ start >= max_blks ||
+ range->len < sb->s_blocksize)
return -EINVAL;
if (end >= max_blks)
end = max_blks - 1;
diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index c8fff930790d..dd91264ba94f 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -296,17 +296,17 @@ static inline loff_t ext3_get_htree_eof(struct file *filp)
* NOTE: offsets obtained *before* ext3_set_inode_flag(dir, EXT3_INODE_INDEX)
* will be invalid once the directory was converted into a dx directory
*/
-loff_t ext3_dir_llseek(struct file *file, loff_t offset, int origin)
+loff_t ext3_dir_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
int dx_dir = is_dx_dir(inode);
loff_t htree_max = ext3_get_htree_eof(file);
if (likely(dx_dir))
- return generic_file_llseek_size(file, offset, origin,
+ return generic_file_llseek_size(file, offset, whence,
htree_max, htree_max);
else
- return generic_file_llseek(file, offset, origin);
+ return generic_file_llseek(file, offset, whence);
}
/*
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 7e87e37a372a..b176d4253544 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1071,8 +1071,7 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode,
* mapped. 0 in case of a HOLE.
*/
if (err > 0) {
- if (err > 1)
- WARN_ON(1);
+ WARN_ON(err > 1);
err = 0;
}
*errp = err;
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 5366393528df..6e50223b3299 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1661,9 +1661,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
return -ENOMEM;
}
sb->s_fs_info = sbi;
- sbi->s_mount_opt = 0;
- sbi->s_resuid = make_kuid(&init_user_ns, EXT3_DEF_RESUID);
- sbi->s_resgid = make_kgid(&init_user_ns, EXT3_DEF_RESGID);
sbi->s_sb_block = sb_block;
blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index c22f17021b6e..987358740cb9 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -39,22 +39,9 @@ config EXT4_USE_FOR_EXT23
compiled kernel size by using one file system driver for
ext2, ext3, and ext4 file systems.
-config EXT4_FS_XATTR
- bool "Ext4 extended attributes"
- depends on EXT4_FS
- default y
- help
- Extended attributes are name:value pairs associated with inodes by
- the kernel or by users (see the attr(5) manual page, or visit
- <http://acl.bestbits.at/> for details).
-
- If unsure, say N.
-
- You need this for POSIX ACL support on ext4.
-
config EXT4_FS_POSIX_ACL
bool "Ext4 POSIX Access Control Lists"
- depends on EXT4_FS_XATTR
+ depends on EXT4_FS
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
@@ -67,7 +54,7 @@ config EXT4_FS_POSIX_ACL
config EXT4_FS_SECURITY
bool "Ext4 Security Labels"
- depends on EXT4_FS_XATTR
+ depends on EXT4_FS
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
index 56fd8f865930..0310fec2ee3d 100644
--- a/fs/ext4/Makefile
+++ b/fs/ext4/Makefile
@@ -7,8 +7,8 @@ obj-$(CONFIG_EXT4_FS) += ext4.o
ext4-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o page-io.o \
ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \
ext4_jbd2.o migrate.o mballoc.o block_validity.o move_extent.o \
- mmp.o indirect.o
+ mmp.o indirect.o extents_status.o xattr.o xattr_user.o \
+ xattr_trusted.o inline.o
-ext4-$(CONFIG_EXT4_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o
ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o
ext4-$(CONFIG_EXT4_FS_SECURITY) += xattr_security.o
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index d3c5b88fd89f..e6e0d988439b 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -423,8 +423,10 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
retry:
handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
- if (IS_ERR(handle))
- return PTR_ERR(handle);
+ if (IS_ERR(handle)) {
+ error = PTR_ERR(handle);
+ goto release_and_out;
+ }
error = ext4_set_acl(handle, inode, type, acl);
ext4_journal_stop(handle);
if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 8e07d2a5a139..80a28b297279 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -27,23 +27,11 @@
#include <linux/slab.h>
#include <linux/rbtree.h>
#include "ext4.h"
-
-static unsigned char ext4_filetype_table[] = {
- DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
-};
+#include "xattr.h"
static int ext4_dx_readdir(struct file *filp,
void *dirent, filldir_t filldir);
-static unsigned char get_dtype(struct super_block *sb, int filetype)
-{
- if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
- (filetype >= EXT4_FT_MAX))
- return DT_UNKNOWN;
-
- return (ext4_filetype_table[filetype]);
-}
-
/**
* Check if the given dir-inode refers to an htree-indexed directory
* (or a directory which chould potentially get coverted to use htree
@@ -68,11 +56,14 @@ static int is_dx_dir(struct inode *inode)
* Return 0 if the directory entry is OK, and 1 if there is a problem
*
* Note: this is the opposite of what ext2 and ext3 historically returned...
+ *
+ * bh passed here can be an inode block or a dir data block, depending
+ * on the inode inline data flag.
*/
int __ext4_check_dir_entry(const char *function, unsigned int line,
struct inode *dir, struct file *filp,
struct ext4_dir_entry_2 *de,
- struct buffer_head *bh,
+ struct buffer_head *bh, char *buf, int size,
unsigned int offset)
{
const char *error_msg = NULL;
@@ -85,9 +76,8 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
error_msg = "rec_len % 4 != 0";
else if (unlikely(rlen < EXT4_DIR_REC_LEN(de->name_len)))
error_msg = "rec_len is too small for name_len";
- else if (unlikely(((char *) de - bh->b_data) + rlen >
- dir->i_sb->s_blocksize))
- error_msg = "directory entry across blocks";
+ else if (unlikely(((char *) de - buf) + rlen > size))
+ error_msg = "directory entry across range";
else if (unlikely(le32_to_cpu(de->inode) >
le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count)))
error_msg = "inode out of bounds";
@@ -98,14 +88,14 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
ext4_error_file(filp, function, line, bh->b_blocknr,
"bad entry in directory: %s - offset=%u(%u), "
"inode=%u, rec_len=%d, name_len=%d",
- error_msg, (unsigned) (offset % bh->b_size),
+ error_msg, (unsigned) (offset % size),
offset, le32_to_cpu(de->inode),
rlen, de->name_len);
else
ext4_error_inode(dir, function, line, bh->b_blocknr,
"bad entry in directory: %s - offset=%u(%u), "
"inode=%u, rec_len=%d, name_len=%d",
- error_msg, (unsigned) (offset % bh->b_size),
+ error_msg, (unsigned) (offset % size),
offset, le32_to_cpu(de->inode),
rlen, de->name_len);
@@ -125,6 +115,14 @@ static int ext4_readdir(struct file *filp,
int ret = 0;
int dir_has_error = 0;
+ if (ext4_has_inline_data(inode)) {
+ int has_inline_data = 1;
+ ret = ext4_read_inline_dir(filp, dirent, filldir,
+ &has_inline_data);
+ if (has_inline_data)
+ return ret;
+ }
+
if (is_dx_dir(inode)) {
err = ext4_dx_readdir(filp, dirent, filldir);
if (err != ERR_BAD_DX_DIR) {
@@ -221,8 +219,9 @@ revalidate:
while (!error && filp->f_pos < inode->i_size
&& offset < sb->s_blocksize) {
de = (struct ext4_dir_entry_2 *) (bh->b_data + offset);
- if (ext4_check_dir_entry(inode, filp, de,
- bh, offset)) {
+ if (ext4_check_dir_entry(inode, filp, de, bh,
+ bh->b_data, bh->b_size,
+ offset)) {
/*
* On error, skip the f_pos to the next block
*/
@@ -334,17 +333,17 @@ static inline loff_t ext4_get_htree_eof(struct file *filp)
*
* For non-htree, ext4_llseek already chooses the proper max offset.
*/
-loff_t ext4_dir_llseek(struct file *file, loff_t offset, int origin)
+loff_t ext4_dir_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
int dx_dir = is_dx_dir(inode);
loff_t htree_max = ext4_get_htree_eof(file);
if (likely(dx_dir))
- return generic_file_llseek_size(file, offset, origin,
+ return generic_file_llseek_size(file, offset, whence,
htree_max, htree_max);
else
- return ext4_llseek(file, offset, origin);
+ return ext4_llseek(file, offset, whence);
}
/*
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index df163da388c9..8462eb3c33aa 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -57,6 +57,16 @@
#define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
#endif
+/*
+ * Turn on EXT_DEBUG to get lots of info about extents operations.
+ */
+#define EXT_DEBUG__
+#ifdef EXT_DEBUG
+#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
+#else
+#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
+#endif
+
#define EXT4_ERROR_INODE(inode, fmt, a...) \
ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a)
@@ -392,6 +402,7 @@ struct flex_groups {
#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */
#define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */
#define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */
+#define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */
#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */
#define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */
@@ -448,28 +459,26 @@ enum {
EXT4_INODE_EXTENTS = 19, /* Inode uses extents */
EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */
EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */
+ EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */
EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */
};
-#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
-#define CHECK_FLAG_VALUE(FLAG) if (!TEST_FLAG_VALUE(FLAG)) { \
- printk(KERN_EMERG "EXT4 flag fail: " #FLAG ": %d %d\n", \
- EXT4_##FLAG##_FL, EXT4_INODE_##FLAG); BUG_ON(1); }
-
-/*
- * Since it's pretty easy to mix up bit numbers and hex values, and we
- * can't do a compile-time test for ENUM values, we use a run-time
- * test to make sure that EXT4_XXX_FL is consistent with respect to
- * EXT4_INODE_XXX. If all is well the printk and BUG_ON will all drop
- * out so it won't cost any extra space in the compiled kernel image.
- * But it's important that these values are the same, since we are
- * using EXT4_INODE_XXX to test for the flag values, but EXT4_XX_FL
- * must be consistent with the values of FS_XXX_FL defined in
- * include/linux/fs.h and the on-disk values found in ext2, ext3, and
- * ext4 filesystems, and of course the values defined in e2fsprogs.
+/*
+ * Since it's pretty easy to mix up bit numbers and hex values, we use a
+ * build-time check to make sure that EXT4_XXX_FL is consistent with respect to
+ * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost
+ * any extra space in the compiled kernel image, otherwise, the build will fail.
+ * It's important that these values are the same, since we are using
+ * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent
+ * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk
+ * values found in ext2, ext3 and ext4 filesystems, and of course the values
+ * defined in e2fsprogs.
*
* It's not paranoia if the Murphy's Law really *is* out to get you. :-)
*/
+#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG))
+#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG))
+
static inline void ext4_check_flag_values(void)
{
CHECK_FLAG_VALUE(SECRM);
@@ -494,6 +503,7 @@ static inline void ext4_check_flag_values(void)
CHECK_FLAG_VALUE(EXTENTS);
CHECK_FLAG_VALUE(EA_INODE);
CHECK_FLAG_VALUE(EOFBLOCKS);
+ CHECK_FLAG_VALUE(INLINE_DATA);
CHECK_FLAG_VALUE(RESERVED);
}
@@ -811,6 +821,8 @@ struct ext4_ext_cache {
__u32 ec_len; /* must be 32bit to return holes */
};
+#include "extents_status.h"
+
/*
* fourth extended file system inode data in memory
*/
@@ -833,7 +845,6 @@ struct ext4_inode_info {
#endif
unsigned long i_flags;
-#ifdef CONFIG_EXT4_FS_XATTR
/*
* Extended attributes can be read independently of the main file
* data. Taking i_mutex even when reading would cause contention
@@ -842,7 +853,6 @@ struct ext4_inode_info {
* EAs.
*/
struct rw_semaphore xattr_sem;
-#endif
struct list_head i_orphan; /* unlinked but open inodes */
@@ -888,6 +898,10 @@ struct ext4_inode_info {
struct list_head i_prealloc_list;
spinlock_t i_prealloc_lock;
+ /* extents status tree */
+ struct ext4_es_tree i_es_tree;
+ rwlock_t i_es_lock;
+
/* ialloc */
ext4_group_t i_last_alloc_group;
@@ -902,6 +916,10 @@ struct ext4_inode_info {
/* on-disk additional length */
__u16 i_extra_isize;
+ /* Indicate the inline data space. */
+ u16 i_inline_off;
+ u16 i_inline_size;
+
#ifdef CONFIG_QUOTA
/* quota space reservation, managed internally by quota code */
qsize_t i_reserved_quota;
@@ -1360,6 +1378,7 @@ enum {
EXT4_STATE_DELALLOC_RESERVED, /* blks already reserved for delalloc */
EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read
nolocking */
+ EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */
};
#define EXT4_INODE_BIT_FNS(name, field, offset) \
@@ -1481,7 +1500,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */
#define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000 /* use crc32c for bg */
#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */
-#define EXT4_FEATURE_INCOMPAT_INLINEDATA 0x8000 /* data in inode */
+#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
#define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
@@ -1505,7 +1524,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
EXT4_FEATURE_INCOMPAT_EXTENTS| \
EXT4_FEATURE_INCOMPAT_64BIT| \
EXT4_FEATURE_INCOMPAT_FLEX_BG| \
- EXT4_FEATURE_INCOMPAT_MMP)
+ EXT4_FEATURE_INCOMPAT_MMP | \
+ EXT4_FEATURE_INCOMPAT_INLINE_DATA)
#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
@@ -1592,6 +1612,11 @@ struct ext4_dir_entry_tail {
__le32 det_checksum; /* crc32c(uuid+inum+dirblock) */
};
+#define EXT4_DIRENT_TAIL(block, blocksize) \
+ ((struct ext4_dir_entry_tail *)(((void *)(block)) + \
+ ((blocksize) - \
+ sizeof(struct ext4_dir_entry_tail))))
+
/*
* Ext4 directory file types. Only the low 3 bits are used. The
* other bits are reserved for now.
@@ -1936,14 +1961,42 @@ ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
struct file *,
struct ext4_dir_entry_2 *,
- struct buffer_head *, unsigned int);
-#define ext4_check_dir_entry(dir, filp, de, bh, offset) \
+ struct buffer_head *, char *, int,
+ unsigned int);
+#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \
unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \
- (de), (bh), (offset)))
+ (de), (bh), (buf), (size), (offset)))
extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
__u32 minor_hash,
struct ext4_dir_entry_2 *dirent);
extern void ext4_htree_free_dir_info(struct dir_private_info *p);
+extern int ext4_find_dest_de(struct inode *dir, struct inode *inode,
+ struct buffer_head *bh,
+ void *buf, int buf_size,
+ const char *name, int namelen,
+ struct ext4_dir_entry_2 **dest_de);
+void ext4_insert_dentry(struct inode *inode,
+ struct ext4_dir_entry_2 *de,
+ int buf_size,
+ const char *name, int namelen);
+static inline void ext4_update_dx_flag(struct inode *inode)
+{
+ if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_COMPAT_DIR_INDEX))
+ ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
+}
+static unsigned char ext4_filetype_table[] = {
+ DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
+};
+
+static inline unsigned char get_dtype(struct super_block *sb, int filetype)
+{
+ if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) ||
+ (filetype >= EXT4_FT_MAX))
+ return DT_UNKNOWN;
+
+ return ext4_filetype_table[filetype];
+}
/* fsync.c */
extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
@@ -1994,8 +2047,23 @@ struct buffer_head *ext4_getblk(handle_t *, struct inode *,
ext4_lblk_t, int, int *);
struct buffer_head *ext4_bread(handle_t *, struct inode *,
ext4_lblk_t, int, int *);
+int ext4_get_block_write(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create);
int ext4_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
+int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh, int create);
+int ext4_walk_page_buffers(handle_t *handle,
+ struct buffer_head *head,
+ unsigned from,
+ unsigned to,
+ int *partial,
+ int (*fn)(handle_t *handle,
+ struct buffer_head *bh));
+int do_journal_get_write_access(handle_t *handle,
+ struct buffer_head *bh);
+#define FALL_BACK_TO_NONDELALLOC 1
+#define CONVERT_INLINE_DATA 2
extern struct inode *ext4_iget(struct super_block *, unsigned long);
extern int ext4_write_inode(struct inode *, struct writeback_control *);
@@ -2050,6 +2118,20 @@ extern int ext4_orphan_add(handle_t *, struct inode *);
extern int ext4_orphan_del(handle_t *, struct inode *);
extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
__u32 start_minor_hash, __u32 *next_hash);
+extern int search_dir(struct buffer_head *bh,
+ char *search_buf,
+ int buf_size,
+ struct inode *dir,
+ const struct qstr *d_name,
+ unsigned int offset,
+ struct ext4_dir_entry_2 **res_dir);
+extern int ext4_generic_delete_entry(handle_t *handle,
+ struct inode *dir,
+ struct ext4_dir_entry_2 *de_del,
+ struct buffer_head *bh,
+ void *entry_buf,
+ int buf_size,
+ int csum_size);
/* resize.c */
extern int ext4_group_add(struct super_block *sb,
@@ -2376,6 +2458,15 @@ extern void ext4_unwritten_wait(struct inode *inode);
extern const struct inode_operations ext4_dir_inode_operations;
extern const struct inode_operations ext4_special_inode_operations;
extern struct dentry *ext4_get_parent(struct dentry *child);
+extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
+ struct ext4_dir_entry_2 *de,
+ int blocksize, int csum_size,
+ unsigned int parent_ino, int dotdot_real_len);
+extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
+ unsigned int blocksize);
+extern int ext4_handle_dirty_dirent_node(handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *bh);
/* symlink.c */
extern const struct inode_operations ext4_symlink_inode_operations;
@@ -2393,6 +2484,9 @@ extern int ext4_check_blockref(const char *, unsigned int,
struct inode *, __le32 *, unsigned int);
/* extents.c */
+struct ext4_ext_path;
+struct ext4_extent;
+
extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks,
@@ -2410,8 +2504,27 @@ extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
ssize_t len);
extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
+extern int ext4_ext_calc_metadata_amount(struct inode *inode,
+ ext4_lblk_t lblocks);
+extern int ext4_extent_tree_init(handle_t *, struct inode *);
+extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
+ int num,
+ struct ext4_ext_path *path);
+extern int ext4_can_extents_be_merged(struct inode *inode,
+ struct ext4_extent *ex1,
+ struct ext4_extent *ex2);
+extern int ext4_ext_insert_extent(handle_t *, struct inode *,
+ struct ext4_ext_path *,
+ struct ext4_extent *, int);
+extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
+ struct ext4_ext_path *);
+extern void ext4_ext_drop_refs(struct ext4_ext_path *);
+extern int ext4_ext_check_inode(struct inode *inode);
+extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);
+
+
/* move_extent.c */
extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
__u64 start_orig, __u64 start_donor,
@@ -2445,14 +2558,10 @@ enum ext4_state_bits {
* never, ever appear in a buffer_head's state
* flag. See EXT4_MAP_FROM_CLUSTER to see where
* this is used. */
- BH_Da_Mapped, /* Delayed allocated block that now has a mapping. This
- * flag is set when ext4_map_blocks is called on a
- * delayed allocated block to get its real mapping. */
};
BUFFER_FNS(Uninit, uninit)
TAS_BUFFER_FNS(Uninit, uninit)
-BUFFER_FNS(Da_Mapped, da_mapped)
/*
* Add new method to test whether block and inode bitmaps are properly
@@ -2503,6 +2612,4 @@ extern void ext4_resize_end(struct super_block *sb);
#endif /* __KERNEL__ */
-#include "ext4_extents.h"
-
#endif /* _EXT4_H */
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index cb1b2c919963..487fda12bc00 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -43,16 +43,6 @@
#define CHECK_BINSEARCH__
/*
- * Turn on EXT_DEBUG to get lots of info about extents operations.
- */
-#define EXT_DEBUG__
-#ifdef EXT_DEBUG
-#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
-#else
-#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
-#endif
-
-/*
* If EXT_STATS is defined then stats numbers are collected.
* These number will be displayed at umount time.
*/
@@ -144,20 +134,6 @@ struct ext4_ext_path {
*/
/*
- * to be called by ext4_ext_walk_space()
- * negative retcode - error
- * positive retcode - signal for ext4_ext_walk_space(), see below
- * callback must return valid extent (passed or newly created)
- */
-typedef int (*ext_prepare_callback)(struct inode *, ext4_lblk_t,
- struct ext4_ext_cache *,
- struct ext4_extent *, void *);
-
-#define EXT_CONTINUE 0
-#define EXT_BREAK 1
-#define EXT_REPEAT 2
-
-/*
* Maximum number of logical blocks in a file; ext4_extent's ee_block is
* __le32.
*/
@@ -300,21 +276,5 @@ static inline void ext4_idx_store_pblock(struct ext4_extent_idx *ix,
0xffff);
}
-extern int ext4_ext_calc_metadata_amount(struct inode *inode,
- ext4_lblk_t lblocks);
-extern int ext4_extent_tree_init(handle_t *, struct inode *);
-extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
- int num,
- struct ext4_ext_path *path);
-extern int ext4_can_extents_be_merged(struct inode *inode,
- struct ext4_extent *ex1,
- struct ext4_extent *ex2);
-extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *, int);
-extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
- struct ext4_ext_path *);
-extern void ext4_ext_drop_refs(struct ext4_ext_path *);
-extern int ext4_ext_check_inode(struct inode *inode);
-extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk,
- int search_hint_reverse);
#endif /* _EXT4_EXTENTS */
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 56d258c18303..7177f9b21cb2 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -254,13 +254,6 @@ static inline void ext4_handle_sync(handle_t *handle)
handle->h_sync = 1;
}
-static inline void ext4_handle_release_buffer(handle_t *handle,
- struct buffer_head *bh)
-{
- if (ext4_handle_valid(handle))
- jbd2_journal_release_buffer(handle, bh);
-}
-
static inline int ext4_handle_is_aborted(handle_t *handle)
{
if (ext4_handle_valid(handle))
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 7011ac967208..5ae1674ec12f 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -41,6 +41,8 @@
#include <asm/uaccess.h>
#include <linux/fiemap.h>
#include "ext4_jbd2.h"
+#include "ext4_extents.h"
+#include "xattr.h"
#include <trace/events/ext4.h>
@@ -109,6 +111,9 @@ static int ext4_split_extent_at(handle_t *handle,
int split_flag,
int flags);
+static int ext4_find_delayed_extent(struct inode *inode,
+ struct ext4_ext_cache *newex);
+
static int ext4_ext_truncate_extend_restart(handle_t *handle,
struct inode *inode,
int needed)
@@ -1959,27 +1964,33 @@ cleanup:
return err;
}
-static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
- ext4_lblk_t num, ext_prepare_callback func,
- void *cbdata)
+static int ext4_fill_fiemap_extents(struct inode *inode,
+ ext4_lblk_t block, ext4_lblk_t num,
+ struct fiemap_extent_info *fieinfo)
{
struct ext4_ext_path *path = NULL;
- struct ext4_ext_cache cbex;
+ struct ext4_ext_cache newex;
struct ext4_extent *ex;
- ext4_lblk_t next, start = 0, end = 0;
+ ext4_lblk_t next, next_del, start = 0, end = 0;
ext4_lblk_t last = block + num;
- int depth, exists, err = 0;
-
- BUG_ON(func == NULL);
- BUG_ON(inode == NULL);
+ int exists, depth = 0, err = 0;
+ unsigned int flags = 0;
+ unsigned char blksize_bits = inode->i_sb->s_blocksize_bits;
while (block < last && block != EXT_MAX_BLOCKS) {
num = last - block;
/* find extent for this block */
down_read(&EXT4_I(inode)->i_data_sem);
+
+ if (path && ext_depth(inode) != depth) {
+ /* depth was changed. we have to realloc path */
+ kfree(path);
+ path = NULL;
+ }
+
path = ext4_ext_find_extent(inode, block, path);
- up_read(&EXT4_I(inode)->i_data_sem);
if (IS_ERR(path)) {
+ up_read(&EXT4_I(inode)->i_data_sem);
err = PTR_ERR(path);
path = NULL;
break;
@@ -1987,13 +1998,16 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
depth = ext_depth(inode);
if (unlikely(path[depth].p_hdr == NULL)) {
+ up_read(&EXT4_I(inode)->i_data_sem);
EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth);
err = -EIO;
break;
}
ex = path[depth].p_ext;
next = ext4_ext_next_allocated_block(path);
+ ext4_ext_drop_refs(path);
+ flags = 0;
exists = 0;
if (!ex) {
/* there is no extent yet, so try to allocate
@@ -2030,40 +2044,64 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
BUG_ON(end <= start);
if (!exists) {
- cbex.ec_block = start;
- cbex.ec_len = end - start;
- cbex.ec_start = 0;
+ newex.ec_block = start;
+ newex.ec_len = end - start;
+ newex.ec_start = 0;
} else {
- cbex.ec_block = le32_to_cpu(ex->ee_block);
- cbex.ec_len = ext4_ext_get_actual_len(ex);
- cbex.ec_start = ext4_ext_pblock(ex);
+ newex.ec_block = le32_to_cpu(ex->ee_block);
+ newex.ec_len = ext4_ext_get_actual_len(ex);
+ newex.ec_start = ext4_ext_pblock(ex);
+ if (ext4_ext_is_uninitialized(ex))
+ flags |= FIEMAP_EXTENT_UNWRITTEN;
}
- if (unlikely(cbex.ec_len == 0)) {
- EXT4_ERROR_INODE(inode, "cbex.ec_len == 0");
- err = -EIO;
- break;
+ /*
+ * Find delayed extent and update newex accordingly. We call
+ * it even in !exists case to find out whether newex is the
+ * last existing extent or not.
+ */
+ next_del = ext4_find_delayed_extent(inode, &newex);
+ if (!exists && next_del) {
+ exists = 1;
+ flags |= FIEMAP_EXTENT_DELALLOC;
}
- err = func(inode, next, &cbex, ex, cbdata);
- ext4_ext_drop_refs(path);
+ up_read(&EXT4_I(inode)->i_data_sem);
- if (err < 0)
+ if (unlikely(newex.ec_len == 0)) {
+ EXT4_ERROR_INODE(inode, "newex.ec_len == 0");
+ err = -EIO;
break;
+ }
- if (err == EXT_REPEAT)
- continue;
- else if (err == EXT_BREAK) {
- err = 0;
- break;
+ /* This is possible iff next == next_del == EXT_MAX_BLOCKS */
+ if (next == next_del) {
+ flags |= FIEMAP_EXTENT_LAST;
+ if (unlikely(next_del != EXT_MAX_BLOCKS ||
+ next != EXT_MAX_BLOCKS)) {
+ EXT4_ERROR_INODE(inode,
+ "next extent == %u, next "
+ "delalloc extent = %u",
+ next, next_del);
+ err = -EIO;
+ break;
+ }
}
- if (ext_depth(inode) != depth) {
- /* depth was changed. we have to realloc path */
- kfree(path);
- path = NULL;
+ if (exists) {
+ err = fiemap_fill_next_extent(fieinfo,
+ (__u64)newex.ec_block << blksize_bits,
+ (__u64)newex.ec_start << blksize_bits,
+ (__u64)newex.ec_len << blksize_bits,
+ flags);
+ if (err < 0)
+ break;
+ if (err == 1) {
+ err = 0;
+ break;
+ }
}
- block = cbex.ec_block + cbex.ec_len;
+ block = newex.ec_block + newex.ec_len;
}
if (path) {
@@ -2156,7 +2194,6 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block,
struct ext4_extent *ex)
{
struct ext4_ext_cache *cex;
- struct ext4_sb_info *sbi;
int ret = 0;
/*
@@ -2164,7 +2201,6 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block,
*/
spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
cex = &EXT4_I(inode)->i_cached_extent;
- sbi = EXT4_SB(inode->i_sb);
/* has cache valid data? */
if (cex->ec_len == 0)
@@ -2190,13 +2226,14 @@ errout:
* removes index from the index block.
*/
static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
- struct ext4_ext_path *path)
+ struct ext4_ext_path *path, int depth)
{
int err;
ext4_fsblk_t leaf;
/* free index block */
- path--;
+ depth--;
+ path = path + depth;
leaf = ext4_idx_pblock(path->p_idx);
if (unlikely(path->p_hdr->eh_entries == 0)) {
EXT4_ERROR_INODE(inode, "path->p_hdr->eh_entries == 0");
@@ -2221,6 +2258,19 @@ static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
ext4_free_blocks(handle, inode, NULL, leaf, 1,
EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET);
+
+ while (--depth >= 0) {
+ if (path->p_idx != EXT_FIRST_INDEX(path->p_hdr))
+ break;
+ path--;
+ err = ext4_ext_get_access(handle, inode, path);
+ if (err)
+ break;
+ path->p_idx->ei_block = (path+1)->p_idx->ei_block;
+ err = ext4_ext_dirty(handle, inode, path);
+ if (err)
+ break;
+ }
return err;
}
@@ -2273,7 +2323,13 @@ int ext4_ext_calc_credits_for_single_extent(struct inode *inode, int nrblocks,
int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk)
{
int index;
- int depth = ext_depth(inode);
+ int depth;
+
+ /* If we are converting the inline data, only one is needed here. */
+ if (ext4_has_inline_data(inode))
+ return 1;
+
+ depth = ext_depth(inode);
if (chunk)
index = depth * 2;
@@ -2557,7 +2613,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
/* if this leaf is free, then we should
* remove it from index block above */
if (err == 0 && eh->eh_entries == 0 && path[depth].p_bh != NULL)
- err = ext4_ext_rm_idx(handle, inode, path + depth);
+ err = ext4_ext_rm_idx(handle, inode, path, depth);
out:
return err;
@@ -2760,7 +2816,7 @@ again:
/* index is empty, remove it;
* handle must be already prepared by the
* truncatei_leaf() */
- err = ext4_ext_rm_idx(handle, inode, path + i);
+ err = ext4_ext_rm_idx(handle, inode, path, i);
}
/* root level has p_bh == NULL, brelse() eats this */
brelse(path[i].p_bh);
@@ -3461,115 +3517,34 @@ out:
/**
* ext4_find_delalloc_range: find delayed allocated block in the given range.
*
- * Goes through the buffer heads in the range [lblk_start, lblk_end] and returns
- * whether there are any buffers marked for delayed allocation. It returns '1'
- * on the first delalloc'ed buffer head found. If no buffer head in the given
- * range is marked for delalloc, it returns 0.
- * lblk_start should always be <= lblk_end.
- * search_hint_reverse is to indicate that searching in reverse from lblk_end to
- * lblk_start might be more efficient (i.e., we will likely hit the delalloc'ed
- * block sooner). This is useful when blocks are truncated sequentially from
- * lblk_start towards lblk_end.
+ * Return 1 if there is a delalloc block in the range, otherwise 0.
*/
static int ext4_find_delalloc_range(struct inode *inode,
ext4_lblk_t lblk_start,
- ext4_lblk_t lblk_end,
- int search_hint_reverse)
+ ext4_lblk_t lblk_end)
{
- struct address_space *mapping = inode->i_mapping;
- struct buffer_head *head, *bh = NULL;
- struct page *page;
- ext4_lblk_t i, pg_lblk;
- pgoff_t index;
+ struct extent_status es;
- if (!test_opt(inode->i_sb, DELALLOC))
- return 0;
-
- /* reverse search wont work if fs block size is less than page size */
- if (inode->i_blkbits < PAGE_CACHE_SHIFT)
- search_hint_reverse = 0;
-
- if (search_hint_reverse)
- i = lblk_end;
+ es.start = lblk_start;
+ ext4_es_find_extent(inode, &es);
+ if (es.len == 0)
+ return 0; /* there is no delay extent in this tree */
+ else if (es.start <= lblk_start && lblk_start < es.start + es.len)
+ return 1;
+ else if (lblk_start <= es.start && es.start <= lblk_end)
+ return 1;
else
- i = lblk_start;
-
- index = i >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
-
- while ((i >= lblk_start) && (i <= lblk_end)) {
- page = find_get_page(mapping, index);
- if (!page)
- goto nextpage;
-
- if (!page_has_buffers(page))
- goto nextpage;
-
- head = page_buffers(page);
- if (!head)
- goto nextpage;
-
- bh = head;
- pg_lblk = index << (PAGE_CACHE_SHIFT -
- inode->i_blkbits);
- do {
- if (unlikely(pg_lblk < lblk_start)) {
- /*
- * This is possible when fs block size is less
- * than page size and our cluster starts/ends in
- * middle of the page. So we need to skip the
- * initial few blocks till we reach the 'lblk'
- */
- pg_lblk++;
- continue;
- }
-
- /* Check if the buffer is delayed allocated and that it
- * is not yet mapped. (when da-buffers are mapped during
- * their writeout, their da_mapped bit is set.)
- */
- if (buffer_delay(bh) && !buffer_da_mapped(bh)) {
- page_cache_release(page);
- trace_ext4_find_delalloc_range(inode,
- lblk_start, lblk_end,
- search_hint_reverse,
- 1, i);
- return 1;
- }
- if (search_hint_reverse)
- i--;
- else
- i++;
- } while ((i >= lblk_start) && (i <= lblk_end) &&
- ((bh = bh->b_this_page) != head));
-nextpage:
- if (page)
- page_cache_release(page);
- /*
- * Move to next page. 'i' will be the first lblk in the next
- * page.
- */
- if (search_hint_reverse)
- index--;
- else
- index++;
- i = index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
- }
-
- trace_ext4_find_delalloc_range(inode, lblk_start, lblk_end,
- search_hint_reverse, 0, 0);
- return 0;
+ return 0;
}
-int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk,
- int search_hint_reverse)
+int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk)
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
ext4_lblk_t lblk_start, lblk_end;
lblk_start = lblk & (~(sbi->s_cluster_ratio - 1));
lblk_end = lblk_start + sbi->s_cluster_ratio - 1;
- return ext4_find_delalloc_range(inode, lblk_start, lblk_end,
- search_hint_reverse);
+ return ext4_find_delalloc_range(inode, lblk_start, lblk_end);
}
/**
@@ -3630,7 +3605,7 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start,
lblk_from = lblk_start & (~(sbi->s_cluster_ratio - 1));
lblk_to = lblk_from + c_offset - 1;
- if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0))
+ if (ext4_find_delalloc_range(inode, lblk_from, lblk_to))
allocated_clusters--;
}
@@ -3640,7 +3615,7 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start,
lblk_from = lblk_start + num_blks;
lblk_to = lblk_from + (sbi->s_cluster_ratio - c_offset) - 1;
- if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0))
+ if (ext4_find_delalloc_range(inode, lblk_from, lblk_to))
allocated_clusters--;
}
@@ -3663,8 +3638,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
flags, allocated);
ext4_ext_show_leaf(inode, path);
- trace_ext4_ext_handle_uninitialized_extents(inode, map, allocated,
- newblock);
+ trace_ext4_ext_handle_uninitialized_extents(inode, map, flags,
+ allocated, newblock);
/* get_block() before submit the IO, split the extent */
if ((flags & EXT4_GET_BLOCKS_PRE_IO)) {
@@ -3911,7 +3886,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_extent newex, *ex, *ex2;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
ext4_fsblk_t newblock = 0;
- int free_on_err = 0, err = 0, depth, ret;
+ int free_on_err = 0, err = 0, depth;
unsigned int allocated = 0, offset = 0;
unsigned int allocated_clusters = 0;
struct ext4_allocation_request ar;
@@ -3927,7 +3902,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) {
if (!newex.ee_start_lo && !newex.ee_start_hi) {
if ((sbi->s_cluster_ratio > 1) &&
- ext4_find_delalloc_cluster(inode, map->m_lblk, 0))
+ ext4_find_delalloc_cluster(inode, map->m_lblk))
map->m_flags |= EXT4_MAP_FROM_CLUSTER;
if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) {
@@ -4007,15 +3982,15 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
ee_len, ee_start);
goto out;
}
- ret = ext4_ext_handle_uninitialized_extents(
+ allocated = ext4_ext_handle_uninitialized_extents(
handle, inode, map, path, flags,
allocated, newblock);
- return ret;
+ goto out3;
}
}
if ((sbi->s_cluster_ratio > 1) &&
- ext4_find_delalloc_cluster(inode, map->m_lblk, 0))
+ ext4_find_delalloc_cluster(inode, map->m_lblk))
map->m_flags |= EXT4_MAP_FROM_CLUSTER;
/*
@@ -4284,8 +4259,8 @@ out2:
kfree(path);
}
- trace_ext4_ext_map_blocks_exit(inode, map->m_lblk,
- newblock, map->m_len, err ? err : allocated);
+out3:
+ trace_ext4_ext_map_blocks_exit(inode, map, err ? err : allocated);
return err ? err : allocated;
}
@@ -4344,6 +4319,8 @@ void ext4_ext_truncate(struct inode *inode)
last_block = (inode->i_size + sb->s_blocksize - 1)
>> EXT4_BLOCK_SIZE_BITS(sb);
+ err = ext4_es_remove_extent(inode, last_block,
+ EXT_MAX_BLOCKS - last_block);
err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCKS - 1);
/* In a multi-transaction truncate, we only make the final
@@ -4434,6 +4411,10 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
if (mode & FALLOC_FL_PUNCH_HOLE)
return ext4_punch_hole(file, offset, len);
+ ret = ext4_convert_inline_data(inode);
+ if (ret)
+ return ret;
+
trace_ext4_fallocate_enter(inode, offset, len, mode);
map.m_lblk = offset >> blkbits;
/*
@@ -4572,206 +4553,43 @@ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
}
/*
- * Callback function called for each extent to gather FIEMAP information.
+ * If newex is not existing extent (newex->ec_start equals zero) find
+ * delayed extent at start of newex and update newex accordingly and
+ * return start of the next delayed extent.
+ *
+ * If newex is existing extent (newex->ec_start is not equal zero)
+ * return start of next delayed extent or EXT_MAX_BLOCKS if no delayed
+ * extent found. Leave newex unmodified.
*/
-static int ext4_ext_fiemap_cb(struct inode *inode, ext4_lblk_t next,
- struct ext4_ext_cache *newex, struct ext4_extent *ex,
- void *data)
+static int ext4_find_delayed_extent(struct inode *inode,
+ struct ext4_ext_cache *newex)
{
- __u64 logical;
- __u64 physical;
- __u64 length;
- __u32 flags = 0;
- int ret = 0;
- struct fiemap_extent_info *fieinfo = data;
- unsigned char blksize_bits;
+ struct extent_status es;
+ ext4_lblk_t next_del;
- blksize_bits = inode->i_sb->s_blocksize_bits;
- logical = (__u64)newex->ec_block << blksize_bits;
+ es.start = newex->ec_block;
+ next_del = ext4_es_find_extent(inode, &es);
if (newex->ec_start == 0) {
/*
* No extent in extent-tree contains block @newex->ec_start,
* then the block may stay in 1)a hole or 2)delayed-extent.
- *
- * Holes or delayed-extents are processed as follows.
- * 1. lookup dirty pages with specified range in pagecache.
- * If no page is got, then there is no delayed-extent and
- * return with EXT_CONTINUE.
- * 2. find the 1st mapped buffer,
- * 3. check if the mapped buffer is both in the request range
- * and a delayed buffer. If not, there is no delayed-extent,
- * then return.
- * 4. a delayed-extent is found, the extent will be collected.
*/
- ext4_lblk_t end = 0;
- pgoff_t last_offset;
- pgoff_t offset;
- pgoff_t index;
- pgoff_t start_index = 0;
- struct page **pages = NULL;
- struct buffer_head *bh = NULL;
- struct buffer_head *head = NULL;
- unsigned int nr_pages = PAGE_SIZE / sizeof(struct page *);
-
- pages = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (pages == NULL)
- return -ENOMEM;
-
- offset = logical >> PAGE_SHIFT;
-repeat:
- last_offset = offset;
- head = NULL;
- ret = find_get_pages_tag(inode->i_mapping, &offset,
- PAGECACHE_TAG_DIRTY, nr_pages, pages);
-
- if (!(flags & FIEMAP_EXTENT_DELALLOC)) {
- /* First time, try to find a mapped buffer. */
- if (ret == 0) {
-out:
- for (index = 0; index < ret; index++)
- page_cache_release(pages[index]);
- /* just a hole. */
- kfree(pages);
- return EXT_CONTINUE;
- }
- index = 0;
-
-next_page:
- /* Try to find the 1st mapped buffer. */
- end = ((__u64)pages[index]->index << PAGE_SHIFT) >>
- blksize_bits;
- if (!page_has_buffers(pages[index]))
- goto out;
- head = page_buffers(pages[index]);
- if (!head)
- goto out;
-
- index++;
- bh = head;
- do {
- if (end >= newex->ec_block +
- newex->ec_len)
- /* The buffer is out of
- * the request range.
- */
- goto out;
-
- if (buffer_mapped(bh) &&
- end >= newex->ec_block) {
- start_index = index - 1;
- /* get the 1st mapped buffer. */
- goto found_mapped_buffer;
- }
-
- bh = bh->b_this_page;
- end++;
- } while (bh != head);
-
- /* No mapped buffer in the range found in this page,
- * We need to look up next page.
- */
- if (index >= ret) {
- /* There is no page left, but we need to limit
- * newex->ec_len.
- */
- newex->ec_len = end - newex->ec_block;
- goto out;
- }
- goto next_page;
- } else {
- /*Find contiguous delayed buffers. */
- if (ret > 0 && pages[0]->index == last_offset)
- head = page_buffers(pages[0]);
- bh = head;
- index = 1;
- start_index = 0;
- }
-
-found_mapped_buffer:
- if (bh != NULL && buffer_delay(bh)) {
- /* 1st or contiguous delayed buffer found. */
- if (!(flags & FIEMAP_EXTENT_DELALLOC)) {
- /*
- * 1st delayed buffer found, record
- * the start of extent.
- */
- flags |= FIEMAP_EXTENT_DELALLOC;
- newex->ec_block = end;
- logical = (__u64)end << blksize_bits;
- }
- /* Find contiguous delayed buffers. */
- do {
- if (!buffer_delay(bh))
- goto found_delayed_extent;
- bh = bh->b_this_page;
- end++;
- } while (bh != head);
-
- for (; index < ret; index++) {
- if (!page_has_buffers(pages[index])) {
- bh = NULL;
- break;
- }
- head = page_buffers(pages[index]);
- if (!head) {
- bh = NULL;
- break;
- }
-
- if (pages[index]->index !=
- pages[start_index]->index + index
- - start_index) {
- /* Blocks are not contiguous. */
- bh = NULL;
- break;
- }
- bh = head;
- do {
- if (!buffer_delay(bh))
- /* Delayed-extent ends. */
- goto found_delayed_extent;
- bh = bh->b_this_page;
- end++;
- } while (bh != head);
- }
- } else if (!(flags & FIEMAP_EXTENT_DELALLOC))
- /* a hole found. */
- goto out;
+ if (es.len == 0)
+ /* A hole found. */
+ return 0;
-found_delayed_extent:
- newex->ec_len = min(end - newex->ec_block,
- (ext4_lblk_t)EXT_INIT_MAX_LEN);
- if (ret == nr_pages && bh != NULL &&
- newex->ec_len < EXT_INIT_MAX_LEN &&
- buffer_delay(bh)) {
- /* Have not collected an extent and continue. */
- for (index = 0; index < ret; index++)
- page_cache_release(pages[index]);
- goto repeat;
+ if (es.start > newex->ec_block) {
+ /* A hole found. */
+ newex->ec_len = min(es.start - newex->ec_block,
+ newex->ec_len);
+ return 0;
}
- for (index = 0; index < ret; index++)
- page_cache_release(pages[index]);
- kfree(pages);
+ newex->ec_len = es.start + es.len - newex->ec_block;
}
- physical = (__u64)newex->ec_start << blksize_bits;
- length = (__u64)newex->ec_len << blksize_bits;
-
- if (ex && ext4_ext_is_uninitialized(ex))
- flags |= FIEMAP_EXTENT_UNWRITTEN;
-
- if (next == EXT_MAX_BLOCKS)
- flags |= FIEMAP_EXTENT_LAST;
-
- ret = fiemap_fill_next_extent(fieinfo, logical, physical,
- length, flags);
- if (ret < 0)
- return ret;
- if (ret == 1)
- return EXT_BREAK;
- return EXT_CONTINUE;
+ return next_del;
}
/* fiemap flags we can handle specified here */
#define EXT4_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
@@ -4971,6 +4789,8 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
ext4_ext_invalidate_cache(inode);
ext4_discard_preallocations(inode);
+ err = ext4_es_remove_extent(inode, first_block,
+ stop_block - first_block);
err = ext4_ext_remove_space(inode, first_block, stop_block - 1);
ext4_ext_invalidate_cache(inode);
@@ -4991,12 +4811,22 @@ out_mutex:
mutex_unlock(&inode->i_mutex);
return err;
}
+
int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len)
{
ext4_lblk_t start_blk;
int error = 0;
+ if (ext4_has_inline_data(inode)) {
+ int has_inline = 1;
+
+ error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline);
+
+ if (has_inline)
+ return error;
+ }
+
/* fallback to generic here if not in extents fmt */
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
return generic_block_fiemap(inode, fieinfo, start, len,
@@ -5018,11 +4848,11 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1;
/*
- * Walk the extent tree gathering extent information.
- * ext4_ext_fiemap_cb will push extents back to user.
+ * Walk the extent tree gathering extent information
+ * and pushing extents back to the user.
*/
- error = ext4_ext_walk_space(inode, start_blk, len_blks,
- ext4_ext_fiemap_cb, fieinfo);
+ error = ext4_fill_fiemap_extents(inode, start_blk,
+ len_blks, fieinfo);
}
return error;
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
new file mode 100644
index 000000000000..564d981a2fcc
--- /dev/null
+++ b/fs/ext4/extents_status.c
@@ -0,0 +1,500 @@
+/*
+ * fs/ext4/extents_status.c
+ *
+ * Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
+ * Modified by
+ * Allison Henderson <achender@linux.vnet.ibm.com>
+ * Hugh Dickins <hughd@google.com>
+ * Zheng Liu <wenqing.lz@taobao.com>
+ *
+ * Ext4 extents status tree core functions.
+ */
+#include <linux/rbtree.h>
+#include "ext4.h"
+#include "extents_status.h"
+#include "ext4_extents.h"
+
+#include <trace/events/ext4.h>
+
+/*
+ * According to previous discussion in Ext4 Developer Workshop, we
+ * will introduce a new structure called io tree to track all extent
+ * status in order to solve some problems that we have met
+ * (e.g. Reservation space warning), and provide extent-level locking.
+ * Delay extent tree is the first step to achieve this goal. It is
+ * original built by Yongqiang Yang. At that time it is called delay
+ * extent tree, whose goal is only track delay extent in memory to
+ * simplify the implementation of fiemap and bigalloc, and introduce
+ * lseek SEEK_DATA/SEEK_HOLE support. That is why it is still called
+ * delay extent tree at the following comment. But for better
+ * understand what it does, it has been rename to extent status tree.
+ *
+ * Currently the first step has been done. All delay extents are
+ * tracked in the tree. It maintains the delay extent when a delay
+ * allocation is issued, and the delay extent is written out or
+ * invalidated. Therefore the implementation of fiemap and bigalloc
+ * are simplified, and SEEK_DATA/SEEK_HOLE are introduced.
+ *
+ * The following comment describes the implemenmtation of extent
+ * status tree and future works.
+ */
+
+/*
+ * extents status tree implementation for ext4.
+ *
+ *
+ * ==========================================================================
+ * Extents status encompass delayed extents and extent locks
+ *
+ * 1. Why delayed extent implementation ?
+ *
+ * Without delayed extent, ext4 identifies a delayed extent by looking
+ * up page cache, this has several deficiencies - complicated, buggy,
+ * and inefficient code.
+ *
+ * FIEMAP, SEEK_HOLE/DATA, bigalloc, punch hole and writeout all need
+ * to know if a block or a range of blocks are belonged to a delayed
+ * extent.
+ *
+ * Let us have a look at how they do without delayed extents implementation.
+ * -- FIEMAP
+ * FIEMAP looks up page cache to identify delayed allocations from holes.
+ *
+ * -- SEEK_HOLE/DATA
+ * SEEK_HOLE/DATA has the same problem as FIEMAP.
+ *
+ * -- bigalloc
+ * bigalloc looks up page cache to figure out if a block is
+ * already under delayed allocation or not to determine whether
+ * quota reserving is needed for the cluster.
+ *
+ * -- punch hole
+ * punch hole looks up page cache to identify a delayed extent.
+ *
+ * -- writeout
+ * Writeout looks up whole page cache to see if a buffer is
+ * mapped, If there are not very many delayed buffers, then it is
+ * time comsuming.
+ *
+ * With delayed extents implementation, FIEMAP, SEEK_HOLE/DATA,
+ * bigalloc and writeout can figure out if a block or a range of
+ * blocks is under delayed allocation(belonged to a delayed extent) or
+ * not by searching the delayed extent tree.
+ *
+ *
+ * ==========================================================================
+ * 2. ext4 delayed extents impelmentation
+ *
+ * -- delayed extent
+ * A delayed extent is a range of blocks which are contiguous
+ * logically and under delayed allocation. Unlike extent in
+ * ext4, delayed extent in ext4 is a in-memory struct, there is
+ * no corresponding on-disk data. There is no limit on length of
+ * delayed extent, so a delayed extent can contain as many blocks
+ * as they are contiguous logically.
+ *
+ * -- delayed extent tree
+ * Every inode has a delayed extent tree and all under delayed
+ * allocation blocks are added to the tree as delayed extents.
+ * Delayed extents in the tree are ordered by logical block no.
+ *
+ * -- operations on a delayed extent tree
+ * There are three operations on a delayed extent tree: find next
+ * delayed extent, adding a space(a range of blocks) and removing
+ * a space.
+ *
+ * -- race on a delayed extent tree
+ * Delayed extent tree is protected inode->i_es_lock.
+ *
+ *
+ * ==========================================================================
+ * 3. performance analysis
+ * -- overhead
+ * 1. There is a cache extent for write access, so if writes are
+ * not very random, adding space operaions are in O(1) time.
+ *
+ * -- gain
+ * 2. Code is much simpler, more readable, more maintainable and
+ * more efficient.
+ *
+ *
+ * ==========================================================================
+ * 4. TODO list
+ * -- Track all extent status
+ *
+ * -- Improve get block process
+ *
+ * -- Extent-level locking
+ */
+
+static struct kmem_cache *ext4_es_cachep;
+
+int __init ext4_init_es(void)
+{
+ ext4_es_cachep = KMEM_CACHE(extent_status, SLAB_RECLAIM_ACCOUNT);
+ if (ext4_es_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+void ext4_exit_es(void)
+{
+ if (ext4_es_cachep)
+ kmem_cache_destroy(ext4_es_cachep);
+}
+
+void ext4_es_init_tree(struct ext4_es_tree *tree)
+{
+ tree->root = RB_ROOT;
+ tree->cache_es = NULL;
+}
+
+#ifdef ES_DEBUG__
+static void ext4_es_print_tree(struct inode *inode)
+{
+ struct ext4_es_tree *tree;
+ struct rb_node *node;
+
+ printk(KERN_DEBUG "status extents for inode %lu:", inode->i_ino);
+ tree = &EXT4_I(inode)->i_es_tree;
+ node = rb_first(&tree->root);
+ while (node) {
+ struct extent_status *es;
+ es = rb_entry(node, struct extent_status, rb_node);
+ printk(KERN_DEBUG " [%u/%u)", es->start, es->len);
+ node = rb_next(node);
+ }
+ printk(KERN_DEBUG "\n");
+}
+#else
+#define ext4_es_print_tree(inode)
+#endif
+
+static inline ext4_lblk_t extent_status_end(struct extent_status *es)
+{
+ BUG_ON(es->start + es->len < es->start);
+ return es->start + es->len - 1;
+}
+
+/*
+ * search through the tree for an delayed extent with a given offset. If
+ * it can't be found, try to find next extent.
+ */
+static struct extent_status *__es_tree_search(struct rb_root *root,
+ ext4_lblk_t offset)
+{
+ struct rb_node *node = root->rb_node;
+ struct extent_status *es = NULL;
+
+ while (node) {
+ es = rb_entry(node, struct extent_status, rb_node);
+ if (offset < es->start)
+ node = node->rb_left;
+ else if (offset > extent_status_end(es))
+ node = node->rb_right;
+ else
+ return es;
+ }
+
+ if (es && offset < es->start)
+ return es;
+
+ if (es && offset > extent_status_end(es)) {
+ node = rb_next(&es->rb_node);
+ return node ? rb_entry(node, struct extent_status, rb_node) :
+ NULL;
+ }
+
+ return NULL;
+}
+
+/*
+ * ext4_es_find_extent: find the 1st delayed extent covering @es->start
+ * if it exists, otherwise, the next extent after @es->start.
+ *
+ * @inode: the inode which owns delayed extents
+ * @es: delayed extent that we found
+ *
+ * Returns the first block of the next extent after es, otherwise
+ * EXT_MAX_BLOCKS if no delay extent is found.
+ * Delayed extent is returned via @es.
+ */
+ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es)
+{
+ struct ext4_es_tree *tree = NULL;
+ struct extent_status *es1 = NULL;
+ struct rb_node *node;
+ ext4_lblk_t ret = EXT_MAX_BLOCKS;
+
+ trace_ext4_es_find_extent_enter(inode, es->start);
+
+ read_lock(&EXT4_I(inode)->i_es_lock);
+ tree = &EXT4_I(inode)->i_es_tree;
+
+ /* find delay extent in cache firstly */
+ if (tree->cache_es) {
+ es1 = tree->cache_es;
+ if (in_range(es->start, es1->start, es1->len)) {
+ es_debug("%u cached by [%u/%u)\n",
+ es->start, es1->start, es1->len);
+ goto out;
+ }
+ }
+
+ es->len = 0;
+ es1 = __es_tree_search(&tree->root, es->start);
+
+out:
+ if (es1) {
+ tree->cache_es = es1;
+ es->start = es1->start;
+ es->len = es1->len;
+ node = rb_next(&es1->rb_node);
+ if (node) {
+ es1 = rb_entry(node, struct extent_status, rb_node);
+ ret = es1->start;
+ }
+ }
+
+ read_unlock(&EXT4_I(inode)->i_es_lock);
+
+ trace_ext4_es_find_extent_exit(inode, es, ret);
+ return ret;
+}
+
+static struct extent_status *
+ext4_es_alloc_extent(ext4_lblk_t start, ext4_lblk_t len)
+{
+ struct extent_status *es;
+ es = kmem_cache_alloc(ext4_es_cachep, GFP_ATOMIC);
+ if (es == NULL)
+ return NULL;
+ es->start = start;
+ es->len = len;
+ return es;
+}
+
+static void ext4_es_free_extent(struct extent_status *es)
+{
+ kmem_cache_free(ext4_es_cachep, es);
+}
+
+static struct extent_status *
+ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es)
+{
+ struct extent_status *es1;
+ struct rb_node *node;
+
+ node = rb_prev(&es->rb_node);
+ if (!node)
+ return es;
+
+ es1 = rb_entry(node, struct extent_status, rb_node);
+ if (es->start == extent_status_end(es1) + 1) {
+ es1->len += es->len;
+ rb_erase(&es->rb_node, &tree->root);
+ ext4_es_free_extent(es);
+ es = es1;
+ }
+
+ return es;
+}
+
+static struct extent_status *
+ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es)
+{
+ struct extent_status *es1;
+ struct rb_node *node;
+
+ node = rb_next(&es->rb_node);
+ if (!node)
+ return es;
+
+ es1 = rb_entry(node, struct extent_status, rb_node);
+ if (es1->start == extent_status_end(es) + 1) {
+ es->len += es1->len;
+ rb_erase(node, &tree->root);
+ ext4_es_free_extent(es1);
+ }
+
+ return es;
+}
+
+static int __es_insert_extent(struct ext4_es_tree *tree, ext4_lblk_t offset,
+ ext4_lblk_t len)
+{
+ struct rb_node **p = &tree->root.rb_node;
+ struct rb_node *parent = NULL;
+ struct extent_status *es;
+ ext4_lblk_t end = offset + len - 1;
+
+ BUG_ON(end < offset);
+ es = tree->cache_es;
+ if (es && offset == (extent_status_end(es) + 1)) {
+ es_debug("cached by [%u/%u)\n", es->start, es->len);
+ es->len += len;
+ es = ext4_es_try_to_merge_right(tree, es);
+ goto out;
+ } else if (es && es->start == end + 1) {
+ es_debug("cached by [%u/%u)\n", es->start, es->len);
+ es->start = offset;
+ es->len += len;
+ es = ext4_es_try_to_merge_left(tree, es);
+ goto out;
+ } else if (es && es->start <= offset &&
+ end <= extent_status_end(es)) {
+ es_debug("cached by [%u/%u)\n", es->start, es->len);
+ goto out;
+ }
+
+ while (*p) {
+ parent = *p;
+ es = rb_entry(parent, struct extent_status, rb_node);
+
+ if (offset < es->start) {
+ if (es->start == end + 1) {
+ es->start = offset;
+ es->len += len;
+ es = ext4_es_try_to_merge_left(tree, es);
+ goto out;
+ }
+ p = &(*p)->rb_left;
+ } else if (offset > extent_status_end(es)) {
+ if (offset == extent_status_end(es) + 1) {
+ es->len += len;
+ es = ext4_es_try_to_merge_right(tree, es);
+ goto out;
+ }
+ p = &(*p)->rb_right;
+ } else {
+ if (extent_status_end(es) <= end)
+ es->len = offset - es->start + len;
+ goto out;
+ }
+ }
+
+ es = ext4_es_alloc_extent(offset, len);
+ if (!es)
+ return -ENOMEM;
+ rb_link_node(&es->rb_node, parent, p);
+ rb_insert_color(&es->rb_node, &tree->root);
+
+out:
+ tree->cache_es = es;
+ return 0;
+}
+
+/*
+ * ext4_es_insert_extent() adds a space to a delayed extent tree.
+ * Caller holds inode->i_es_lock.
+ *
+ * ext4_es_insert_extent is called by ext4_da_write_begin and
+ * ext4_es_remove_extent.
+ *
+ * Return 0 on success, error code on failure.
+ */
+int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t offset,
+ ext4_lblk_t len)
+{
+ struct ext4_es_tree *tree;
+ int err = 0;
+
+ trace_ext4_es_insert_extent(inode, offset, len);
+ es_debug("add [%u/%u) to extent status tree of inode %lu\n",
+ offset, len, inode->i_ino);
+
+ write_lock(&EXT4_I(inode)->i_es_lock);
+ tree = &EXT4_I(inode)->i_es_tree;
+ err = __es_insert_extent(tree, offset, len);
+ write_unlock(&EXT4_I(inode)->i_es_lock);
+
+ ext4_es_print_tree(inode);
+
+ return err;
+}
+
+/*
+ * ext4_es_remove_extent() removes a space from a delayed extent tree.
+ * Caller holds inode->i_es_lock.
+ *
+ * Return 0 on success, error code on failure.
+ */
+int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset,
+ ext4_lblk_t len)
+{
+ struct rb_node *node;
+ struct ext4_es_tree *tree;
+ struct extent_status *es;
+ struct extent_status orig_es;
+ ext4_lblk_t len1, len2, end;
+ int err = 0;
+
+ trace_ext4_es_remove_extent(inode, offset, len);
+ es_debug("remove [%u/%u) from extent status tree of inode %lu\n",
+ offset, len, inode->i_ino);
+
+ end = offset + len - 1;
+ BUG_ON(end < offset);
+ write_lock(&EXT4_I(inode)->i_es_lock);
+ tree = &EXT4_I(inode)->i_es_tree;
+ es = __es_tree_search(&tree->root, offset);
+ if (!es)
+ goto out;
+ if (es->start > end)
+ goto out;
+
+ /* Simply invalidate cache_es. */
+ tree->cache_es = NULL;
+
+ orig_es.start = es->start;
+ orig_es.len = es->len;
+ len1 = offset > es->start ? offset - es->start : 0;
+ len2 = extent_status_end(es) > end ?
+ extent_status_end(es) - end : 0;
+ if (len1 > 0)
+ es->len = len1;
+ if (len2 > 0) {
+ if (len1 > 0) {
+ err = __es_insert_extent(tree, end + 1, len2);
+ if (err) {
+ es->start = orig_es.start;
+ es->len = orig_es.len;
+ goto out;
+ }
+ } else {
+ es->start = end + 1;
+ es->len = len2;
+ }
+ goto out;
+ }
+
+ if (len1 > 0) {
+ node = rb_next(&es->rb_node);
+ if (node)
+ es = rb_entry(node, struct extent_status, rb_node);
+ else
+ es = NULL;
+ }
+
+ while (es && extent_status_end(es) <= end) {
+ node = rb_next(&es->rb_node);
+ rb_erase(&es->rb_node, &tree->root);
+ ext4_es_free_extent(es);
+ if (!node) {
+ es = NULL;
+ break;
+ }
+ es = rb_entry(node, struct extent_status, rb_node);
+ }
+
+ if (es && es->start < end + 1) {
+ len1 = extent_status_end(es) - end;
+ es->start = end + 1;
+ es->len = len1;
+ }
+
+out:
+ write_unlock(&EXT4_I(inode)->i_es_lock);
+ ext4_es_print_tree(inode);
+ return err;
+}
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
new file mode 100644
index 000000000000..077f82db092a
--- /dev/null
+++ b/fs/ext4/extents_status.h
@@ -0,0 +1,45 @@
+/*
+ * fs/ext4/extents_status.h
+ *
+ * Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
+ * Modified by
+ * Allison Henderson <achender@linux.vnet.ibm.com>
+ * Zheng Liu <wenqing.lz@taobao.com>
+ *
+ */
+
+#ifndef _EXT4_EXTENTS_STATUS_H
+#define _EXT4_EXTENTS_STATUS_H
+
+/*
+ * Turn on ES_DEBUG__ to get lots of info about extent status operations.
+ */
+#ifdef ES_DEBUG__
+#define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
+#else
+#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
+#endif
+
+struct extent_status {
+ struct rb_node rb_node;
+ ext4_lblk_t start; /* first block extent covers */
+ ext4_lblk_t len; /* length of extent in block */
+};
+
+struct ext4_es_tree {
+ struct rb_root root;
+ struct extent_status *cache_es; /* recently accessed extent */
+};
+
+extern int __init ext4_init_es(void);
+extern void ext4_exit_es(void);
+extern void ext4_es_init_tree(struct ext4_es_tree *tree);
+
+extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t start,
+ ext4_lblk_t len);
+extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t start,
+ ext4_lblk_t len);
+extern ext4_lblk_t ext4_es_find_extent(struct inode *inode,
+ struct extent_status *es);
+
+#endif /* _EXT4_EXTENTS_STATUS_H */
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index bf3966bccd34..405565a62277 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -24,6 +24,7 @@
#include <linux/mount.h>
#include <linux/path.h>
#include <linux/quotaops.h>
+#include <linux/pagevec.h>
#include "ext4.h"
#include "ext4_jbd2.h"
#include "xattr.h"
@@ -107,14 +108,6 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov,
/* Unaligned direct AIO must be serialized; see comment above */
if (unaligned_aio) {
- static unsigned long unaligned_warn_time;
-
- /* Warn about this once per day */
- if (printk_timed_ratelimit(&unaligned_warn_time, 60*60*24*HZ))
- ext4_msg(inode->i_sb, KERN_WARNING,
- "Unaligned AIO/DIO on inode %ld by %s; "
- "performance will be poor.",
- inode->i_ino, current->comm);
mutex_lock(ext4_aio_mutex(inode));
ext4_unwritten_wait(inode);
}
@@ -286,11 +279,329 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
}
/*
+ * Here we use ext4_map_blocks() to get a block mapping for a extent-based
+ * file rather than ext4_ext_walk_space() because we can introduce
+ * SEEK_DATA/SEEK_HOLE for block-mapped and extent-mapped file at the same
+ * function. When extent status tree has been fully implemented, it will
+ * track all extent status for a file and we can directly use it to
+ * retrieve the offset for SEEK_DATA/SEEK_HOLE.
+ */
+
+/*
+ * When we retrieve the offset for SEEK_DATA/SEEK_HOLE, we would need to
+ * lookup page cache to check whether or not there has some data between
+ * [startoff, endoff] because, if this range contains an unwritten extent,
+ * we determine this extent as a data or a hole according to whether the
+ * page cache has data or not.
+ */
+static int ext4_find_unwritten_pgoff(struct inode *inode,
+ int whence,
+ struct ext4_map_blocks *map,
+ loff_t *offset)
+{
+ struct pagevec pvec;
+ unsigned int blkbits;
+ pgoff_t index;
+ pgoff_t end;
+ loff_t endoff;
+ loff_t startoff;
+ loff_t lastoff;
+ int found = 0;
+
+ blkbits = inode->i_sb->s_blocksize_bits;
+ startoff = *offset;
+ lastoff = startoff;
+ endoff = (map->m_lblk + map->m_len) << blkbits;
+
+ index = startoff >> PAGE_CACHE_SHIFT;
+ end = endoff >> PAGE_CACHE_SHIFT;
+
+ pagevec_init(&pvec, 0);
+ do {
+ int i, num;
+ unsigned long nr_pages;
+
+ num = min_t(pgoff_t, end - index, PAGEVEC_SIZE);
+ nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index,
+ (pgoff_t)num);
+ if (nr_pages == 0) {
+ if (whence == SEEK_DATA)
+ break;
+
+ BUG_ON(whence != SEEK_HOLE);
+ /*
+ * If this is the first time to go into the loop and
+ * offset is not beyond the end offset, it will be a
+ * hole at this offset
+ */
+ if (lastoff == startoff || lastoff < endoff)
+ found = 1;
+ break;
+ }
+
+ /*
+ * If this is the first time to go into the loop and
+ * offset is smaller than the first page offset, it will be a
+ * hole at this offset.
+ */
+ if (lastoff == startoff && whence == SEEK_HOLE &&
+ lastoff < page_offset(pvec.pages[0])) {
+ found = 1;
+ break;
+ }
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+ struct buffer_head *bh, *head;
+
+ /*
+ * If the current offset is not beyond the end of given
+ * range, it will be a hole.
+ */
+ if (lastoff < endoff && whence == SEEK_HOLE &&
+ page->index > end) {
+ found = 1;
+ *offset = lastoff;
+ goto out;
+ }
+
+ lock_page(page);
+
+ if (unlikely(page->mapping != inode->i_mapping)) {
+ unlock_page(page);
+ continue;
+ }
+
+ if (!page_has_buffers(page)) {
+ unlock_page(page);
+ continue;
+ }
+
+ if (page_has_buffers(page)) {
+ lastoff = page_offset(page);
+ bh = head = page_buffers(page);
+ do {
+ if (buffer_uptodate(bh) ||
+ buffer_unwritten(bh)) {
+ if (whence == SEEK_DATA)
+ found = 1;
+ } else {
+ if (whence == SEEK_HOLE)
+ found = 1;
+ }
+ if (found) {
+ *offset = max_t(loff_t,
+ startoff, lastoff);
+ unlock_page(page);
+ goto out;
+ }
+ lastoff += bh->b_size;
+ bh = bh->b_this_page;
+ } while (bh != head);
+ }
+
+ lastoff = page_offset(page) + PAGE_SIZE;
+ unlock_page(page);
+ }
+
+ /*
+ * The no. of pages is less than our desired, that would be a
+ * hole in there.
+ */
+ if (nr_pages < num && whence == SEEK_HOLE) {
+ found = 1;
+ *offset = lastoff;
+ break;
+ }
+
+ index = pvec.pages[i - 1]->index + 1;
+ pagevec_release(&pvec);
+ } while (index <= end);
+
+out:
+ pagevec_release(&pvec);
+ return found;
+}
+
+/*
+ * ext4_seek_data() retrieves the offset for SEEK_DATA.
+ */
+static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct ext4_map_blocks map;
+ struct extent_status es;
+ ext4_lblk_t start, last, end;
+ loff_t dataoff, isize;
+ int blkbits;
+ int ret = 0;
+
+ mutex_lock(&inode->i_mutex);
+
+ isize = i_size_read(inode);
+ if (offset >= isize) {
+ mutex_unlock(&inode->i_mutex);
+ return -ENXIO;
+ }
+
+ blkbits = inode->i_sb->s_blocksize_bits;
+ start = offset >> blkbits;
+ last = start;
+ end = isize >> blkbits;
+ dataoff = offset;
+
+ do {
+ map.m_lblk = last;
+ map.m_len = end - last + 1;
+ ret = ext4_map_blocks(NULL, inode, &map, 0);
+ if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) {
+ if (last != start)
+ dataoff = last << blkbits;
+ break;
+ }
+
+ /*
+ * If there is a delay extent at this offset,
+ * it will be as a data.
+ */
+ es.start = last;
+ (void)ext4_es_find_extent(inode, &es);
+ if (last >= es.start &&
+ last < es.start + es.len) {
+ if (last != start)
+ dataoff = last << blkbits;
+ break;
+ }
+
+ /*
+ * If there is a unwritten extent at this offset,
+ * it will be as a data or a hole according to page
+ * cache that has data or not.
+ */
+ if (map.m_flags & EXT4_MAP_UNWRITTEN) {
+ int unwritten;
+ unwritten = ext4_find_unwritten_pgoff(inode, SEEK_DATA,
+ &map, &dataoff);
+ if (unwritten)
+ break;
+ }
+
+ last++;
+ dataoff = last << blkbits;
+ } while (last <= end);
+
+ mutex_unlock(&inode->i_mutex);
+
+ if (dataoff > isize)
+ return -ENXIO;
+
+ if (dataoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
+ return -EINVAL;
+ if (dataoff > maxsize)
+ return -EINVAL;
+
+ if (dataoff != file->f_pos) {
+ file->f_pos = dataoff;
+ file->f_version = 0;
+ }
+
+ return dataoff;
+}
+
+/*
+ * ext4_seek_hole() retrieves the offset for SEEK_HOLE.
+ */
+static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct ext4_map_blocks map;
+ struct extent_status es;
+ ext4_lblk_t start, last, end;
+ loff_t holeoff, isize;
+ int blkbits;
+ int ret = 0;
+
+ mutex_lock(&inode->i_mutex);
+
+ isize = i_size_read(inode);
+ if (offset >= isize) {
+ mutex_unlock(&inode->i_mutex);
+ return -ENXIO;
+ }
+
+ blkbits = inode->i_sb->s_blocksize_bits;
+ start = offset >> blkbits;
+ last = start;
+ end = isize >> blkbits;
+ holeoff = offset;
+
+ do {
+ map.m_lblk = last;
+ map.m_len = end - last + 1;
+ ret = ext4_map_blocks(NULL, inode, &map, 0);
+ if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) {
+ last += ret;
+ holeoff = last << blkbits;
+ continue;
+ }
+
+ /*
+ * If there is a delay extent at this offset,
+ * we will skip this extent.
+ */
+ es.start = last;
+ (void)ext4_es_find_extent(inode, &es);
+ if (last >= es.start &&
+ last < es.start + es.len) {
+ last = es.start + es.len;
+ holeoff = last << blkbits;
+ continue;
+ }
+
+ /*
+ * If there is a unwritten extent at this offset,
+ * it will be as a data or a hole according to page
+ * cache that has data or not.
+ */
+ if (map.m_flags & EXT4_MAP_UNWRITTEN) {
+ int unwritten;
+ unwritten = ext4_find_unwritten_pgoff(inode, SEEK_HOLE,
+ &map, &holeoff);
+ if (!unwritten) {
+ last += ret;
+ holeoff = last << blkbits;
+ continue;
+ }
+ }
+
+ /* find a hole */
+ break;
+ } while (last <= end);
+
+ mutex_unlock(&inode->i_mutex);
+
+ if (holeoff > isize)
+ holeoff = isize;
+
+ if (holeoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
+ return -EINVAL;
+ if (holeoff > maxsize)
+ return -EINVAL;
+
+ if (holeoff != file->f_pos) {
+ file->f_pos = holeoff;
+ file->f_version = 0;
+ }
+
+ return holeoff;
+}
+
+/*
* ext4_llseek() handles both block-mapped and extent-mapped maxbytes values
* by calling generic_file_llseek_size() with the appropriate maxbytes
* value for each.
*/
-loff_t ext4_llseek(struct file *file, loff_t offset, int origin)
+loff_t ext4_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
loff_t maxbytes;
@@ -300,8 +611,19 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int origin)
else
maxbytes = inode->i_sb->s_maxbytes;
- return generic_file_llseek_size(file, offset, origin,
- maxbytes, i_size_read(inode));
+ switch (whence) {
+ case SEEK_SET:
+ case SEEK_CUR:
+ case SEEK_END:
+ return generic_file_llseek_size(file, offset, whence,
+ maxbytes, i_size_read(inode));
+ case SEEK_DATA:
+ return ext4_seek_data(file, offset, maxbytes);
+ case SEEK_HOLE:
+ return ext4_seek_hole(file, offset, maxbytes);
+ }
+
+ return -EINVAL;
}
const struct file_operations ext4_file_operations = {
@@ -326,12 +648,10 @@ const struct file_operations ext4_file_operations = {
const struct inode_operations ext4_file_inode_operations = {
.setattr = ext4_setattr,
.getattr = ext4_getattr,
-#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
-#endif
.get_acl = ext4_get_acl,
.fiemap = ext4_fiemap,
};
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index be1d89f385b4..3278e64e57b6 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -44,7 +44,6 @@
*/
static int ext4_sync_parent(struct inode *inode)
{
- struct writeback_control wbc;
struct dentry *dentry = NULL;
struct inode *next;
int ret = 0;
@@ -66,10 +65,7 @@ static int ext4_sync_parent(struct inode *inode)
ret = sync_mapping_buffers(inode->i_mapping);
if (ret)
break;
- memset(&wbc, 0, sizeof(wbc));
- wbc.sync_mode = WB_SYNC_ALL;
- wbc.nr_to_write = 0; /* only write out the inode */
- ret = sync_inode(inode, &wbc);
+ ret = sync_inode_metadata(inode, 1);
if (ret)
break;
}
@@ -113,8 +109,6 @@ static int __sync_inode(struct inode *inode, int datasync)
*
* What we do is just kick off a commit and wait on it. This will snapshot the
* inode to disk.
- *
- * i_mutex lock is held when entering and exiting this function
*/
int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 4facdd29a350..3f32c8012447 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -725,6 +725,10 @@ repeat_in_this_group:
"inode=%lu", ino + 1);
continue;
}
+ BUFFER_TRACE(inode_bitmap_bh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, inode_bitmap_bh);
+ if (err)
+ goto fail;
ext4_lock_group(sb, group);
ret2 = ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data);
ext4_unlock_group(sb, group);
@@ -738,6 +742,11 @@ repeat_in_this_group:
goto out;
got:
+ BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata");
+ err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh);
+ if (err)
+ goto fail;
+
/* We may have to initialize the block bitmap if it isn't already */
if (ext4_has_group_desc_csum(sb) &&
gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
@@ -753,7 +762,6 @@ got:
BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap");
err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh);
- brelse(block_bitmap_bh);
/* recheck and clear flag under lock if we still need to */
ext4_lock_group(sb, group);
@@ -766,16 +774,12 @@ got:
ext4_group_desc_csum_set(sb, group, gdp);
}
ext4_unlock_group(sb, group);
+ brelse(block_bitmap_bh);
if (err)
goto fail;
}
- BUFFER_TRACE(inode_bitmap_bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, inode_bitmap_bh);
- if (err)
- goto fail;
-
BUFFER_TRACE(group_desc_bh, "get_write_access");
err = ext4_journal_get_write_access(handle, group_desc_bh);
if (err)
@@ -823,11 +827,6 @@ got:
}
ext4_unlock_group(sb, group);
- BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata");
- err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh);
- if (err)
- goto fail;
-
BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh);
if (err)
@@ -903,6 +902,10 @@ got:
ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
+ ei->i_inline_off = 0;
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA))
+ ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+
ret = inode;
dquot_initialize(inode);
err = dquot_alloc_inode(inode);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 792e388e7b44..20862f96e8ae 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -22,6 +22,7 @@
#include "ext4_jbd2.h"
#include "truncate.h"
+#include "ext4_extents.h" /* Needed for EXT_MAX_BLOCKS */
#include <trace/events/ext4.h>
@@ -755,8 +756,7 @@ cleanup:
partial--;
}
out:
- trace_ext4_ind_map_blocks_exit(inode, map->m_lblk,
- map->m_pblk, map->m_len, err);
+ trace_ext4_ind_map_blocks_exit(inode, map, err);
return err;
}
@@ -1412,6 +1412,7 @@ void ext4_ind_truncate(struct inode *inode)
down_write(&ei->i_data_sem);
ext4_discard_preallocations(inode);
+ ext4_es_remove_extent(inode, last_block, EXT_MAX_BLOCKS - last_block);
/*
* The orphan list entry will now protect us from any crash which
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
new file mode 100644
index 000000000000..387c47c6cda9
--- /dev/null
+++ b/fs/ext4/inline.c
@@ -0,0 +1,1884 @@
+/*
+ * Copyright (c) 2012 Taobao.
+ * Written by Tao Ma <boyu.mt@taobao.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include "ext4_jbd2.h"
+#include "ext4.h"
+#include "xattr.h"
+#include "truncate.h"
+#include <linux/fiemap.h>
+
+#define EXT4_XATTR_SYSTEM_DATA "data"
+#define EXT4_MIN_INLINE_DATA_SIZE ((sizeof(__le32) * EXT4_N_BLOCKS))
+#define EXT4_INLINE_DOTDOT_SIZE 4
+
+int ext4_get_inline_size(struct inode *inode)
+{
+ if (EXT4_I(inode)->i_inline_off)
+ return EXT4_I(inode)->i_inline_size;
+
+ return 0;
+}
+
+static int get_max_inline_xattr_value_size(struct inode *inode,
+ struct ext4_iloc *iloc)
+{
+ struct ext4_xattr_ibody_header *header;
+ struct ext4_xattr_entry *entry;
+ struct ext4_inode *raw_inode;
+ int free, min_offs;
+
+ min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
+ EXT4_GOOD_OLD_INODE_SIZE -
+ EXT4_I(inode)->i_extra_isize -
+ sizeof(struct ext4_xattr_ibody_header);
+
+ /*
+ * We need to subtract another sizeof(__u32) since an in-inode xattr
+ * needs an empty 4 bytes to indicate the gap between the xattr entry
+ * and the name/value pair.
+ */
+ if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR))
+ return EXT4_XATTR_SIZE(min_offs -
+ EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)) -
+ EXT4_XATTR_ROUND - sizeof(__u32));
+
+ raw_inode = ext4_raw_inode(iloc);
+ header = IHDR(inode, raw_inode);
+ entry = IFIRST(header);
+
+ /* Compute min_offs. */
+ for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
+ if (!entry->e_value_block && entry->e_value_size) {
+ size_t offs = le16_to_cpu(entry->e_value_offs);
+ if (offs < min_offs)
+ min_offs = offs;
+ }
+ }
+ free = min_offs -
+ ((void *)entry - (void *)IFIRST(header)) - sizeof(__u32);
+
+ if (EXT4_I(inode)->i_inline_off) {
+ entry = (struct ext4_xattr_entry *)
+ ((void *)raw_inode + EXT4_I(inode)->i_inline_off);
+
+ free += le32_to_cpu(entry->e_value_size);
+ goto out;
+ }
+
+ free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA));
+
+ if (free > EXT4_XATTR_ROUND)
+ free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND);
+ else
+ free = 0;
+
+out:
+ return free;
+}
+
+/*
+ * Get the maximum size we now can store in an inode.
+ * If we can't find the space for a xattr entry, don't use the space
+ * of the extents since we have no space to indicate the inline data.
+ */
+int ext4_get_max_inline_size(struct inode *inode)
+{
+ int error, max_inline_size;
+ struct ext4_iloc iloc;
+
+ if (EXT4_I(inode)->i_extra_isize == 0)
+ return 0;
+
+ error = ext4_get_inode_loc(inode, &iloc);
+ if (error) {
+ ext4_error_inode(inode, __func__, __LINE__, 0,
+ "can't get inode location %lu",
+ inode->i_ino);
+ return 0;
+ }
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ max_inline_size = get_max_inline_xattr_value_size(inode, &iloc);
+ up_read(&EXT4_I(inode)->xattr_sem);
+
+ brelse(iloc.bh);
+
+ if (!max_inline_size)
+ return 0;
+
+ return max_inline_size + EXT4_MIN_INLINE_DATA_SIZE;
+}
+
+int ext4_has_inline_data(struct inode *inode)
+{
+ return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) &&
+ EXT4_I(inode)->i_inline_off;
+}
+
+/*
+ * this function does not take xattr_sem, which is OK because it is
+ * currently only used in a code path coming form ext4_iget, before
+ * the new inode has been unlocked
+ */
+int ext4_find_inline_data_nolock(struct inode *inode)
+{
+ struct ext4_xattr_ibody_find is = {
+ .s = { .not_found = -ENODATA, },
+ };
+ struct ext4_xattr_info i = {
+ .name_index = EXT4_XATTR_INDEX_SYSTEM,
+ .name = EXT4_XATTR_SYSTEM_DATA,
+ };
+ int error;
+
+ if (EXT4_I(inode)->i_extra_isize == 0)
+ return 0;
+
+ error = ext4_get_inode_loc(inode, &is.iloc);
+ if (error)
+ return error;
+
+ error = ext4_xattr_ibody_find(inode, &i, &is);
+ if (error)
+ goto out;
+
+ if (!is.s.not_found) {
+ EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
+ (void *)ext4_raw_inode(&is.iloc));
+ EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
+ le32_to_cpu(is.s.here->e_value_size);
+ ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+ }
+out:
+ brelse(is.iloc.bh);
+ return error;
+}
+
+static int ext4_read_inline_data(struct inode *inode, void *buffer,
+ unsigned int len,
+ struct ext4_iloc *iloc)
+{
+ struct ext4_xattr_entry *entry;
+ struct ext4_xattr_ibody_header *header;
+ int cp_len = 0;
+ struct ext4_inode *raw_inode;
+
+ if (!len)
+ return 0;
+
+ BUG_ON(len > EXT4_I(inode)->i_inline_size);
+
+ cp_len = len < EXT4_MIN_INLINE_DATA_SIZE ?
+ len : EXT4_MIN_INLINE_DATA_SIZE;
+
+ raw_inode = ext4_raw_inode(iloc);
+ memcpy(buffer, (void *)(raw_inode->i_block), cp_len);
+
+ len -= cp_len;
+ buffer += cp_len;
+
+ if (!len)
+ goto out;
+
+ header = IHDR(inode, raw_inode);
+ entry = (struct ext4_xattr_entry *)((void *)raw_inode +
+ EXT4_I(inode)->i_inline_off);
+ len = min_t(unsigned int, len,
+ (unsigned int)le32_to_cpu(entry->e_value_size));
+
+ memcpy(buffer,
+ (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs), len);
+ cp_len += len;
+
+out:
+ return cp_len;
+}
+
+/*
+ * write the buffer to the inline inode.
+ * If 'create' is set, we don't need to do the extra copy in the xattr
+ * value since it is already handled by ext4_xattr_ibody_inline_set.
+ * That saves us one memcpy.
+ */
+void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc,
+ void *buffer, loff_t pos, unsigned int len)
+{
+ struct ext4_xattr_entry *entry;
+ struct ext4_xattr_ibody_header *header;
+ struct ext4_inode *raw_inode;
+ int cp_len = 0;
+
+ BUG_ON(!EXT4_I(inode)->i_inline_off);
+ BUG_ON(pos + len > EXT4_I(inode)->i_inline_size);
+
+ raw_inode = ext4_raw_inode(iloc);
+ buffer += pos;
+
+ if (pos < EXT4_MIN_INLINE_DATA_SIZE) {
+ cp_len = pos + len > EXT4_MIN_INLINE_DATA_SIZE ?
+ EXT4_MIN_INLINE_DATA_SIZE - pos : len;
+ memcpy((void *)raw_inode->i_block + pos, buffer, cp_len);
+
+ len -= cp_len;
+ buffer += cp_len;
+ pos += cp_len;
+ }
+
+ if (!len)
+ return;
+
+ pos -= EXT4_MIN_INLINE_DATA_SIZE;
+ header = IHDR(inode, raw_inode);
+ entry = (struct ext4_xattr_entry *)((void *)raw_inode +
+ EXT4_I(inode)->i_inline_off);
+
+ memcpy((void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs) + pos,
+ buffer, len);
+}
+
+static int ext4_create_inline_data(handle_t *handle,
+ struct inode *inode, unsigned len)
+{
+ int error;
+ void *value = NULL;
+ struct ext4_xattr_ibody_find is = {
+ .s = { .not_found = -ENODATA, },
+ };
+ struct ext4_xattr_info i = {
+ .name_index = EXT4_XATTR_INDEX_SYSTEM,
+ .name = EXT4_XATTR_SYSTEM_DATA,
+ };
+
+ error = ext4_get_inode_loc(inode, &is.iloc);
+ if (error)
+ return error;
+
+ error = ext4_journal_get_write_access(handle, is.iloc.bh);
+ if (error)
+ goto out;
+
+ if (len > EXT4_MIN_INLINE_DATA_SIZE) {
+ value = EXT4_ZERO_XATTR_VALUE;
+ len -= EXT4_MIN_INLINE_DATA_SIZE;
+ } else {
+ value = "";
+ len = 0;
+ }
+
+ /* Insert the the xttr entry. */
+ i.value = value;
+ i.value_len = len;
+
+ error = ext4_xattr_ibody_find(inode, &i, &is);
+ if (error)
+ goto out;
+
+ BUG_ON(!is.s.not_found);
+
+ error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is);
+ if (error) {
+ if (error == -ENOSPC)
+ ext4_clear_inode_state(inode,
+ EXT4_STATE_MAY_INLINE_DATA);
+ goto out;
+ }
+
+ memset((void *)ext4_raw_inode(&is.iloc)->i_block,
+ 0, EXT4_MIN_INLINE_DATA_SIZE);
+
+ EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
+ (void *)ext4_raw_inode(&is.iloc));
+ EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE;
+ ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
+ ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);
+ get_bh(is.iloc.bh);
+ error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
+
+out:
+ brelse(is.iloc.bh);
+ return error;
+}
+
+static int ext4_update_inline_data(handle_t *handle, struct inode *inode,
+ unsigned int len)
+{
+ int error;
+ void *value = NULL;
+ struct ext4_xattr_ibody_find is = {
+ .s = { .not_found = -ENODATA, },
+ };
+ struct ext4_xattr_info i = {
+ .name_index = EXT4_XATTR_INDEX_SYSTEM,
+ .name = EXT4_XATTR_SYSTEM_DATA,
+ };
+
+ /* If the old space is ok, write the data directly. */
+ if (len <= EXT4_I(inode)->i_inline_size)
+ return 0;
+
+ error = ext4_get_inode_loc(inode, &is.iloc);
+ if (error)
+ return error;
+
+ error = ext4_xattr_ibody_find(inode, &i, &is);
+ if (error)
+ goto out;
+
+ BUG_ON(is.s.not_found);
+
+ len -= EXT4_MIN_INLINE_DATA_SIZE;
+ value = kzalloc(len, GFP_NOFS);
+ if (!value)
+ goto out;
+
+ error = ext4_xattr_ibody_get(inode, i.name_index, i.name,
+ value, len);
+ if (error == -ENODATA)
+ goto out;
+
+ error = ext4_journal_get_write_access(handle, is.iloc.bh);
+ if (error)
+ goto out;
+
+ /* Update the xttr entry. */
+ i.value = value;
+ i.value_len = len;
+
+ error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is);
+ if (error)
+ goto out;
+
+ EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here -
+ (void *)ext4_raw_inode(&is.iloc));
+ EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE +
+ le32_to_cpu(is.s.here->e_value_size);
+ ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+ get_bh(is.iloc.bh);
+ error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
+
+out:
+ kfree(value);
+ brelse(is.iloc.bh);
+ return error;
+}
+
+int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
+ unsigned int len)
+{
+ int ret, size;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+
+ if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))
+ return -ENOSPC;
+
+ size = ext4_get_max_inline_size(inode);
+ if (size < len)
+ return -ENOSPC;
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+
+ if (ei->i_inline_off)
+ ret = ext4_update_inline_data(handle, inode, len);
+ else
+ ret = ext4_create_inline_data(handle, inode, len);
+
+ up_write(&EXT4_I(inode)->xattr_sem);
+
+ return ret;
+}
+
+static int ext4_destroy_inline_data_nolock(handle_t *handle,
+ struct inode *inode)
+{
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ struct ext4_xattr_ibody_find is = {
+ .s = { .not_found = 0, },
+ };
+ struct ext4_xattr_info i = {
+ .name_index = EXT4_XATTR_INDEX_SYSTEM,
+ .name = EXT4_XATTR_SYSTEM_DATA,
+ .value = NULL,
+ .value_len = 0,
+ };
+ int error;
+
+ if (!ei->i_inline_off)
+ return 0;
+
+ error = ext4_get_inode_loc(inode, &is.iloc);
+ if (error)
+ return error;
+
+ error = ext4_xattr_ibody_find(inode, &i, &is);
+ if (error)
+ goto out;
+
+ error = ext4_journal_get_write_access(handle, is.iloc.bh);
+ if (error)
+ goto out;
+
+ error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is);
+ if (error)
+ goto out;
+
+ memset((void *)ext4_raw_inode(&is.iloc)->i_block,
+ 0, EXT4_MIN_INLINE_DATA_SIZE);
+
+ if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+ if (S_ISDIR(inode->i_mode) ||
+ S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) {
+ ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS);
+ ext4_ext_tree_init(handle, inode);
+ }
+ }
+ ext4_clear_inode_flag(inode, EXT4_INODE_INLINE_DATA);
+
+ get_bh(is.iloc.bh);
+ error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
+
+ EXT4_I(inode)->i_inline_off = 0;
+ EXT4_I(inode)->i_inline_size = 0;
+ ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+out:
+ brelse(is.iloc.bh);
+ if (error == -ENODATA)
+ error = 0;
+ return error;
+}
+
+static int ext4_read_inline_page(struct inode *inode, struct page *page)
+{
+ void *kaddr;
+ int ret = 0;
+ size_t len;
+ struct ext4_iloc iloc;
+
+ BUG_ON(!PageLocked(page));
+ BUG_ON(!ext4_has_inline_data(inode));
+ BUG_ON(page->index);
+
+ if (!EXT4_I(inode)->i_inline_off) {
+ ext4_warning(inode->i_sb, "inode %lu doesn't have inline data.",
+ inode->i_ino);
+ goto out;
+ }
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ goto out;
+
+ len = min_t(size_t, ext4_get_inline_size(inode), i_size_read(inode));
+ kaddr = kmap_atomic(page);
+ ret = ext4_read_inline_data(inode, kaddr, len, &iloc);
+ flush_dcache_page(page);
+ kunmap_atomic(kaddr);
+ zero_user_segment(page, len, PAGE_CACHE_SIZE);
+ SetPageUptodate(page);
+ brelse(iloc.bh);
+
+out:
+ return ret;
+}
+
+int ext4_readpage_inline(struct inode *inode, struct page *page)
+{
+ int ret = 0;
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ up_read(&EXT4_I(inode)->xattr_sem);
+ return -EAGAIN;
+ }
+
+ /*
+ * Current inline data can only exist in the 1st page,
+ * So for all the other pages, just set them uptodate.
+ */
+ if (!page->index)
+ ret = ext4_read_inline_page(inode, page);
+ else if (!PageUptodate(page)) {
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ SetPageUptodate(page);
+ }
+
+ up_read(&EXT4_I(inode)->xattr_sem);
+
+ unlock_page(page);
+ return ret >= 0 ? 0 : ret;
+}
+
+static int ext4_convert_inline_data_to_extent(struct address_space *mapping,
+ struct inode *inode,
+ unsigned flags)
+{
+ int ret, needed_blocks;
+ handle_t *handle = NULL;
+ int retries = 0, sem_held = 0;
+ struct page *page = NULL;
+ unsigned from, to;
+ struct ext4_iloc iloc;
+
+ if (!ext4_has_inline_data(inode)) {
+ /*
+ * clear the flag so that no new write
+ * will trap here again.
+ */
+ ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+ return 0;
+ }
+
+ needed_blocks = ext4_writepage_trans_blocks(inode);
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ return ret;
+
+retry:
+ handle = ext4_journal_start(inode, needed_blocks);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ handle = NULL;
+ goto out;
+ }
+
+ /* We cannot recurse into the filesystem as the transaction is already
+ * started */
+ flags |= AOP_FLAG_NOFS;
+
+ page = grab_cache_page_write_begin(mapping, 0, flags);
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ sem_held = 1;
+ /* If some one has already done this for us, just exit. */
+ if (!ext4_has_inline_data(inode)) {
+ ret = 0;
+ goto out;
+ }
+
+ from = 0;
+ to = ext4_get_inline_size(inode);
+ if (!PageUptodate(page)) {
+ ret = ext4_read_inline_page(inode, page);
+ if (ret < 0)
+ goto out;
+ }
+
+ ret = ext4_destroy_inline_data_nolock(handle, inode);
+ if (ret)
+ goto out;
+
+ if (ext4_should_dioread_nolock(inode))
+ ret = __block_write_begin(page, from, to, ext4_get_block_write);
+ else
+ ret = __block_write_begin(page, from, to, ext4_get_block);
+
+ if (!ret && ext4_should_journal_data(inode)) {
+ ret = ext4_walk_page_buffers(handle, page_buffers(page),
+ from, to, NULL,
+ do_journal_get_write_access);
+ }
+
+ if (ret) {
+ unlock_page(page);
+ page_cache_release(page);
+ ext4_orphan_add(handle, inode);
+ up_write(&EXT4_I(inode)->xattr_sem);
+ sem_held = 0;
+ ext4_journal_stop(handle);
+ handle = NULL;
+ ext4_truncate_failed_write(inode);
+ /*
+ * If truncate failed early the inode might
+ * still be on the orphan list; we need to
+ * make sure the inode is removed from the
+ * orphan list in that case.
+ */
+ if (inode->i_nlink)
+ ext4_orphan_del(NULL, inode);
+ }
+
+ if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ goto retry;
+
+ block_commit_write(page, from, to);
+out:
+ if (page) {
+ unlock_page(page);
+ page_cache_release(page);
+ }
+ if (sem_held)
+ up_write(&EXT4_I(inode)->xattr_sem);
+ if (handle)
+ ext4_journal_stop(handle);
+ brelse(iloc.bh);
+ return ret;
+}
+
+/*
+ * Try to write data in the inode.
+ * If the inode has inline data, check whether the new write can be
+ * in the inode also. If not, create the page the handle, move the data
+ * to the page make it update and let the later codes create extent for it.
+ */
+int ext4_try_to_write_inline_data(struct address_space *mapping,
+ struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned flags,
+ struct page **pagep)
+{
+ int ret;
+ handle_t *handle;
+ struct page *page;
+ struct ext4_iloc iloc;
+
+ if (pos + len > ext4_get_max_inline_size(inode))
+ goto convert;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ return ret;
+
+ /*
+ * The possible write could happen in the inode,
+ * so try to reserve the space in inode first.
+ */
+ handle = ext4_journal_start(inode, 1);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ handle = NULL;
+ goto out;
+ }
+
+ ret = ext4_prepare_inline_data(handle, inode, pos + len);
+ if (ret && ret != -ENOSPC)
+ goto out;
+
+ /* We don't have space in inline inode, so convert it to extent. */
+ if (ret == -ENOSPC) {
+ ext4_journal_stop(handle);
+ brelse(iloc.bh);
+ goto convert;
+ }
+
+ flags |= AOP_FLAG_NOFS;
+
+ page = grab_cache_page_write_begin(mapping, 0, flags);
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ *pagep = page;
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ ret = 0;
+ unlock_page(page);
+ page_cache_release(page);
+ goto out_up_read;
+ }
+
+ if (!PageUptodate(page)) {
+ ret = ext4_read_inline_page(inode, page);
+ if (ret < 0)
+ goto out_up_read;
+ }
+
+ ret = 1;
+ handle = NULL;
+out_up_read:
+ up_read(&EXT4_I(inode)->xattr_sem);
+out:
+ if (handle)
+ ext4_journal_stop(handle);
+ brelse(iloc.bh);
+ return ret;
+convert:
+ return ext4_convert_inline_data_to_extent(mapping,
+ inode, flags);
+}
+
+int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len,
+ unsigned copied, struct page *page)
+{
+ int ret;
+ void *kaddr;
+ struct ext4_iloc iloc;
+
+ if (unlikely(copied < len)) {
+ if (!PageUptodate(page)) {
+ copied = 0;
+ goto out;
+ }
+ }
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret) {
+ ext4_std_error(inode->i_sb, ret);
+ copied = 0;
+ goto out;
+ }
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ BUG_ON(!ext4_has_inline_data(inode));
+
+ kaddr = kmap_atomic(page);
+ ext4_write_inline_data(inode, &iloc, kaddr, pos, len);
+ kunmap_atomic(kaddr);
+ SetPageUptodate(page);
+ /* clear page dirty so that writepages wouldn't work for us. */
+ ClearPageDirty(page);
+
+ up_write(&EXT4_I(inode)->xattr_sem);
+ brelse(iloc.bh);
+out:
+ return copied;
+}
+
+struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+ unsigned len,
+ struct page *page)
+{
+ int ret;
+ void *kaddr;
+ struct ext4_iloc iloc;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret) {
+ ext4_std_error(inode->i_sb, ret);
+ return NULL;
+ }
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ kaddr = kmap_atomic(page);
+ ext4_write_inline_data(inode, &iloc, kaddr, 0, len);
+ kunmap_atomic(kaddr);
+ up_write(&EXT4_I(inode)->xattr_sem);
+
+ return iloc.bh;
+}
+
+/*
+ * Try to make the page cache and handle ready for the inline data case.
+ * We can call this function in 2 cases:
+ * 1. The inode is created and the first write exceeds inline size. We can
+ * clear the inode state safely.
+ * 2. The inode has inline data, then we need to read the data, make it
+ * update and dirty so that ext4_da_writepages can handle it. We don't
+ * need to start the journal since the file's metatdata isn't changed now.
+ */
+static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping,
+ struct inode *inode,
+ unsigned flags,
+ void **fsdata)
+{
+ int ret = 0, inline_size;
+ struct page *page;
+
+ page = grab_cache_page_write_begin(mapping, 0, flags);
+ if (!page)
+ return -ENOMEM;
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+ goto out;
+ }
+
+ inline_size = ext4_get_inline_size(inode);
+
+ if (!PageUptodate(page)) {
+ ret = ext4_read_inline_page(inode, page);
+ if (ret < 0)
+ goto out;
+ }
+
+ ret = __block_write_begin(page, 0, inline_size,
+ ext4_da_get_block_prep);
+ if (ret) {
+ ext4_truncate_failed_write(inode);
+ goto out;
+ }
+
+ SetPageDirty(page);
+ SetPageUptodate(page);
+ ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+ *fsdata = (void *)CONVERT_INLINE_DATA;
+
+out:
+ up_read(&EXT4_I(inode)->xattr_sem);
+ if (page) {
+ unlock_page(page);
+ page_cache_release(page);
+ }
+ return ret;
+}
+
+/*
+ * Prepare the write for the inline data.
+ * If the the data can be written into the inode, we just read
+ * the page and make it uptodate, and start the journal.
+ * Otherwise read the page, makes it dirty so that it can be
+ * handle in writepages(the i_disksize update is left to the
+ * normal ext4_da_write_end).
+ */
+int ext4_da_write_inline_data_begin(struct address_space *mapping,
+ struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned flags,
+ struct page **pagep,
+ void **fsdata)
+{
+ int ret, inline_size;
+ handle_t *handle;
+ struct page *page;
+ struct ext4_iloc iloc;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ return ret;
+
+ handle = ext4_journal_start(inode, 1);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ handle = NULL;
+ goto out;
+ }
+
+ inline_size = ext4_get_max_inline_size(inode);
+
+ ret = -ENOSPC;
+ if (inline_size >= pos + len) {
+ ret = ext4_prepare_inline_data(handle, inode, pos + len);
+ if (ret && ret != -ENOSPC)
+ goto out;
+ }
+
+ if (ret == -ENOSPC) {
+ ret = ext4_da_convert_inline_data_to_extent(mapping,
+ inode,
+ flags,
+ fsdata);
+ goto out;
+ }
+
+ /*
+ * We cannot recurse into the filesystem as the transaction
+ * is already started.
+ */
+ flags |= AOP_FLAG_NOFS;
+
+ page = grab_cache_page_write_begin(mapping, 0, flags);
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ ret = 0;
+ goto out_release_page;
+ }
+
+ if (!PageUptodate(page)) {
+ ret = ext4_read_inline_page(inode, page);
+ if (ret < 0)
+ goto out_release_page;
+ }
+
+ up_read(&EXT4_I(inode)->xattr_sem);
+ *pagep = page;
+ handle = NULL;
+ brelse(iloc.bh);
+ return 1;
+out_release_page:
+ up_read(&EXT4_I(inode)->xattr_sem);
+ unlock_page(page);
+ page_cache_release(page);
+out:
+ if (handle)
+ ext4_journal_stop(handle);
+ brelse(iloc.bh);
+ return ret;
+}
+
+int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
+ unsigned len, unsigned copied,
+ struct page *page)
+{
+ int i_size_changed = 0;
+
+ copied = ext4_write_inline_data_end(inode, pos, len, copied, page);
+
+ /*
+ * No need to use i_size_read() here, the i_size
+ * cannot change under us because we hold i_mutex.
+ *
+ * But it's important to update i_size while still holding page lock:
+ * page writeout could otherwise come in and zero beyond i_size.
+ */
+ if (pos+copied > inode->i_size) {
+ i_size_write(inode, pos+copied);
+ i_size_changed = 1;
+ }
+ unlock_page(page);
+ page_cache_release(page);
+
+ /*
+ * Don't mark the inode dirty under page lock. First, it unnecessarily
+ * makes the holding time of page lock longer. Second, it forces lock
+ * ordering of page lock and transaction start for journaling
+ * filesystems.
+ */
+ if (i_size_changed)
+ mark_inode_dirty(inode);
+
+ return copied;
+}
+
+#ifdef INLINE_DIR_DEBUG
+void ext4_show_inline_dir(struct inode *dir, struct buffer_head *bh,
+ void *inline_start, int inline_size)
+{
+ int offset;
+ unsigned short de_len;
+ struct ext4_dir_entry_2 *de = inline_start;
+ void *dlimit = inline_start + inline_size;
+
+ trace_printk("inode %lu\n", dir->i_ino);
+ offset = 0;
+ while ((void *)de < dlimit) {
+ de_len = ext4_rec_len_from_disk(de->rec_len, inline_size);
+ trace_printk("de: off %u rlen %u name %*.s nlen %u ino %u\n",
+ offset, de_len, de->name_len, de->name,
+ de->name_len, le32_to_cpu(de->inode));
+ if (ext4_check_dir_entry(dir, NULL, de, bh,
+ inline_start, inline_size, offset))
+ BUG();
+
+ offset += de_len;
+ de = (struct ext4_dir_entry_2 *) ((char *) de + de_len);
+ }
+}
+#else
+#define ext4_show_inline_dir(dir, bh, inline_start, inline_size)
+#endif
+
+/*
+ * Add a new entry into a inline dir.
+ * It will return -ENOSPC if no space is available, and -EIO
+ * and -EEXIST if directory entry already exists.
+ */
+static int ext4_add_dirent_to_inline(handle_t *handle,
+ struct dentry *dentry,
+ struct inode *inode,
+ struct ext4_iloc *iloc,
+ void *inline_start, int inline_size)
+{
+ struct inode *dir = dentry->d_parent->d_inode;
+ const char *name = dentry->d_name.name;
+ int namelen = dentry->d_name.len;
+ unsigned short reclen;
+ int err;
+ struct ext4_dir_entry_2 *de;
+
+ reclen = EXT4_DIR_REC_LEN(namelen);
+ err = ext4_find_dest_de(dir, inode, iloc->bh,
+ inline_start, inline_size,
+ name, namelen, &de);
+ if (err)
+ return err;
+
+ err = ext4_journal_get_write_access(handle, iloc->bh);
+ if (err)
+ return err;
+ ext4_insert_dentry(inode, de, inline_size, name, namelen);
+
+ ext4_show_inline_dir(dir, iloc->bh, inline_start, inline_size);
+
+ /*
+ * XXX shouldn't update any times until successful
+ * completion of syscall, but too many callers depend
+ * on this.
+ *
+ * XXX similarly, too many callers depend on
+ * ext4_new_inode() setting the times, but error
+ * recovery deletes the inode, so the worst that can
+ * happen is that the times are slightly out of date
+ * and/or different from the directory change time.
+ */
+ dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
+ ext4_update_dx_flag(dir);
+ dir->i_version++;
+ ext4_mark_inode_dirty(handle, dir);
+ return 1;
+}
+
+static void *ext4_get_inline_xattr_pos(struct inode *inode,
+ struct ext4_iloc *iloc)
+{
+ struct ext4_xattr_entry *entry;
+ struct ext4_xattr_ibody_header *header;
+
+ BUG_ON(!EXT4_I(inode)->i_inline_off);
+
+ header = IHDR(inode, ext4_raw_inode(iloc));
+ entry = (struct ext4_xattr_entry *)((void *)ext4_raw_inode(iloc) +
+ EXT4_I(inode)->i_inline_off);
+
+ return (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs);
+}
+
+/* Set the final de to cover the whole block. */
+static void ext4_update_final_de(void *de_buf, int old_size, int new_size)
+{
+ struct ext4_dir_entry_2 *de, *prev_de;
+ void *limit;
+ int de_len;
+
+ de = (struct ext4_dir_entry_2 *)de_buf;
+ if (old_size) {
+ limit = de_buf + old_size;
+ do {
+ prev_de = de;
+ de_len = ext4_rec_len_from_disk(de->rec_len, old_size);
+ de_buf += de_len;
+ de = (struct ext4_dir_entry_2 *)de_buf;
+ } while (de_buf < limit);
+
+ prev_de->rec_len = ext4_rec_len_to_disk(de_len + new_size -
+ old_size, new_size);
+ } else {
+ /* this is just created, so create an empty entry. */
+ de->inode = 0;
+ de->rec_len = ext4_rec_len_to_disk(new_size, new_size);
+ }
+}
+
+static int ext4_update_inline_dir(handle_t *handle, struct inode *dir,
+ struct ext4_iloc *iloc)
+{
+ int ret;
+ int old_size = EXT4_I(dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE;
+ int new_size = get_max_inline_xattr_value_size(dir, iloc);
+
+ if (new_size - old_size <= EXT4_DIR_REC_LEN(1))
+ return -ENOSPC;
+
+ ret = ext4_update_inline_data(handle, dir,
+ new_size + EXT4_MIN_INLINE_DATA_SIZE);
+ if (ret)
+ return ret;
+
+ ext4_update_final_de(ext4_get_inline_xattr_pos(dir, iloc), old_size,
+ EXT4_I(dir)->i_inline_size -
+ EXT4_MIN_INLINE_DATA_SIZE);
+ dir->i_size = EXT4_I(dir)->i_disksize = EXT4_I(dir)->i_inline_size;
+ return 0;
+}
+
+static void ext4_restore_inline_data(handle_t *handle, struct inode *inode,
+ struct ext4_iloc *iloc,
+ void *buf, int inline_size)
+{
+ ext4_create_inline_data(handle, inode, inline_size);
+ ext4_write_inline_data(inode, iloc, buf, 0, inline_size);
+ ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+}
+
+static int ext4_finish_convert_inline_dir(handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *dir_block,
+ void *buf,
+ int inline_size)
+{
+ int err, csum_size = 0, header_size = 0;
+ struct ext4_dir_entry_2 *de;
+ struct ext4_dir_entry_tail *t;
+ void *target = dir_block->b_data;
+
+ /*
+ * First create "." and ".." and then copy the dir information
+ * back to the block.
+ */
+ de = (struct ext4_dir_entry_2 *)target;
+ de = ext4_init_dot_dotdot(inode, de,
+ inode->i_sb->s_blocksize, csum_size,
+ le32_to_cpu(((struct ext4_dir_entry_2 *)buf)->inode), 1);
+ header_size = (void *)de - target;
+
+ memcpy((void *)de, buf + EXT4_INLINE_DOTDOT_SIZE,
+ inline_size - EXT4_INLINE_DOTDOT_SIZE);
+
+ if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ csum_size = sizeof(struct ext4_dir_entry_tail);
+
+ inode->i_size = inode->i_sb->s_blocksize;
+ i_size_write(inode, inode->i_sb->s_blocksize);
+ EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
+ ext4_update_final_de(dir_block->b_data,
+ inline_size - EXT4_INLINE_DOTDOT_SIZE + header_size,
+ inode->i_sb->s_blocksize - csum_size);
+
+ if (csum_size) {
+ t = EXT4_DIRENT_TAIL(dir_block->b_data,
+ inode->i_sb->s_blocksize);
+ initialize_dirent_tail(t, inode->i_sb->s_blocksize);
+ }
+ set_buffer_uptodate(dir_block);
+ err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+ if (err)
+ goto out;
+ set_buffer_verified(dir_block);
+out:
+ return err;
+}
+
+static int ext4_convert_inline_data_nolock(handle_t *handle,
+ struct inode *inode,
+ struct ext4_iloc *iloc)
+{
+ int error;
+ void *buf = NULL;
+ struct buffer_head *data_bh = NULL;
+ struct ext4_map_blocks map;
+ int inline_size;
+
+ inline_size = ext4_get_inline_size(inode);
+ buf = kmalloc(inline_size, GFP_NOFS);
+ if (!buf) {
+ error = -ENOMEM;
+ goto out;
+ }
+
+ error = ext4_read_inline_data(inode, buf, inline_size, iloc);
+ if (error < 0)
+ goto out;
+
+ error = ext4_destroy_inline_data_nolock(handle, inode);
+ if (error)
+ goto out;
+
+ map.m_lblk = 0;
+ map.m_len = 1;
+ map.m_flags = 0;
+ error = ext4_map_blocks(handle, inode, &map, EXT4_GET_BLOCKS_CREATE);
+ if (error < 0)
+ goto out_restore;
+ if (!(map.m_flags & EXT4_MAP_MAPPED)) {
+ error = -EIO;
+ goto out_restore;
+ }
+
+ data_bh = sb_getblk(inode->i_sb, map.m_pblk);
+ if (!data_bh) {
+ error = -EIO;
+ goto out_restore;
+ }
+
+ lock_buffer(data_bh);
+ error = ext4_journal_get_create_access(handle, data_bh);
+ if (error) {
+ unlock_buffer(data_bh);
+ error = -EIO;
+ goto out_restore;
+ }
+ memset(data_bh->b_data, 0, inode->i_sb->s_blocksize);
+
+ if (!S_ISDIR(inode->i_mode)) {
+ memcpy(data_bh->b_data, buf, inline_size);
+ set_buffer_uptodate(data_bh);
+ error = ext4_handle_dirty_metadata(handle,
+ inode, data_bh);
+ } else {
+ error = ext4_finish_convert_inline_dir(handle, inode, data_bh,
+ buf, inline_size);
+ }
+
+ unlock_buffer(data_bh);
+out_restore:
+ if (error)
+ ext4_restore_inline_data(handle, inode, iloc, buf, inline_size);
+
+out:
+ brelse(data_bh);
+ kfree(buf);
+ return error;
+}
+
+/*
+ * Try to add the new entry to the inline data.
+ * If succeeds, return 0. If not, extended the inline dir and copied data to
+ * the new created block.
+ */
+int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
+ struct inode *inode)
+{
+ int ret, inline_size;
+ void *inline_start;
+ struct ext4_iloc iloc;
+ struct inode *dir = dentry->d_parent->d_inode;
+
+ ret = ext4_get_inode_loc(dir, &iloc);
+ if (ret)
+ return ret;
+
+ down_write(&EXT4_I(dir)->xattr_sem);
+ if (!ext4_has_inline_data(dir))
+ goto out;
+
+ inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
+ EXT4_INLINE_DOTDOT_SIZE;
+ inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
+
+ ret = ext4_add_dirent_to_inline(handle, dentry, inode, &iloc,
+ inline_start, inline_size);
+ if (ret != -ENOSPC)
+ goto out;
+
+ /* check whether it can be inserted to inline xattr space. */
+ inline_size = EXT4_I(dir)->i_inline_size -
+ EXT4_MIN_INLINE_DATA_SIZE;
+ if (!inline_size) {
+ /* Try to use the xattr space.*/
+ ret = ext4_update_inline_dir(handle, dir, &iloc);
+ if (ret && ret != -ENOSPC)
+ goto out;
+
+ inline_size = EXT4_I(dir)->i_inline_size -
+ EXT4_MIN_INLINE_DATA_SIZE;
+ }
+
+ if (inline_size) {
+ inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+
+ ret = ext4_add_dirent_to_inline(handle, dentry, inode, &iloc,
+ inline_start, inline_size);
+
+ if (ret != -ENOSPC)
+ goto out;
+ }
+
+ /*
+ * The inline space is filled up, so create a new block for it.
+ * As the extent tree will be created, we have to save the inline
+ * dir first.
+ */
+ ret = ext4_convert_inline_data_nolock(handle, dir, &iloc);
+
+out:
+ ext4_mark_inode_dirty(handle, dir);
+ up_write(&EXT4_I(dir)->xattr_sem);
+ brelse(iloc.bh);
+ return ret;
+}
+
+int ext4_read_inline_dir(struct file *filp,
+ void *dirent, filldir_t filldir,
+ int *has_inline_data)
+{
+ int error = 0;
+ unsigned int offset, parent_ino;
+ int i, stored;
+ struct ext4_dir_entry_2 *de;
+ struct super_block *sb;
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ int ret, inline_size = 0;
+ struct ext4_iloc iloc;
+ void *dir_buf = NULL;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ return ret;
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ up_read(&EXT4_I(inode)->xattr_sem);
+ *has_inline_data = 0;
+ goto out;
+ }
+
+ inline_size = ext4_get_inline_size(inode);
+ dir_buf = kmalloc(inline_size, GFP_NOFS);
+ if (!dir_buf) {
+ ret = -ENOMEM;
+ up_read(&EXT4_I(inode)->xattr_sem);
+ goto out;
+ }
+
+ ret = ext4_read_inline_data(inode, dir_buf, inline_size, &iloc);
+ up_read(&EXT4_I(inode)->xattr_sem);
+ if (ret < 0)
+ goto out;
+
+ sb = inode->i_sb;
+ stored = 0;
+ parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
+
+ while (!error && !stored && filp->f_pos < inode->i_size) {
+revalidate:
+ /*
+ * If the version has changed since the last call to
+ * readdir(2), then we might be pointing to an invalid
+ * dirent right now. Scan from the start of the inline
+ * dir to make sure.
+ */
+ if (filp->f_version != inode->i_version) {
+ for (i = 0;
+ i < inode->i_size && i < offset;) {
+ if (!i) {
+ /* skip "." and ".." if needed. */
+ i += EXT4_INLINE_DOTDOT_SIZE;
+ continue;
+ }
+ de = (struct ext4_dir_entry_2 *)
+ (dir_buf + i);
+ /* It's too expensive to do a full
+ * dirent test each time round this
+ * loop, but we do have to test at
+ * least that it is non-zero. A
+ * failure will be detected in the
+ * dirent test below. */
+ if (ext4_rec_len_from_disk(de->rec_len,
+ inline_size) < EXT4_DIR_REC_LEN(1))
+ break;
+ i += ext4_rec_len_from_disk(de->rec_len,
+ inline_size);
+ }
+ offset = i;
+ filp->f_pos = offset;
+ filp->f_version = inode->i_version;
+ }
+
+ while (!error && filp->f_pos < inode->i_size) {
+ if (filp->f_pos == 0) {
+ error = filldir(dirent, ".", 1, 0, inode->i_ino,
+ DT_DIR);
+ if (error)
+ break;
+ stored++;
+
+ error = filldir(dirent, "..", 2, 0, parent_ino,
+ DT_DIR);
+ if (error)
+ break;
+ stored++;
+
+ filp->f_pos = offset = EXT4_INLINE_DOTDOT_SIZE;
+ continue;
+ }
+
+ de = (struct ext4_dir_entry_2 *)(dir_buf + offset);
+ if (ext4_check_dir_entry(inode, filp, de,
+ iloc.bh, dir_buf,
+ inline_size, offset)) {
+ ret = stored;
+ goto out;
+ }
+ offset += ext4_rec_len_from_disk(de->rec_len,
+ inline_size);
+ if (le32_to_cpu(de->inode)) {
+ /* We might block in the next section
+ * if the data destination is
+ * currently swapped out. So, use a
+ * version stamp to detect whether or
+ * not the directory has been modified
+ * during the copy operation.
+ */
+ u64 version = filp->f_version;
+
+ error = filldir(dirent, de->name,
+ de->name_len,
+ filp->f_pos,
+ le32_to_cpu(de->inode),
+ get_dtype(sb, de->file_type));
+ if (error)
+ break;
+ if (version != filp->f_version)
+ goto revalidate;
+ stored++;
+ }
+ filp->f_pos += ext4_rec_len_from_disk(de->rec_len,
+ inline_size);
+ }
+ offset = 0;
+ }
+out:
+ kfree(dir_buf);
+ brelse(iloc.bh);
+ return ret;
+}
+
+struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+ struct ext4_dir_entry_2 **parent_de,
+ int *retval)
+{
+ struct ext4_iloc iloc;
+
+ *retval = ext4_get_inode_loc(inode, &iloc);
+ if (*retval)
+ return NULL;
+
+ *parent_de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
+
+ return iloc.bh;
+}
+
+/*
+ * Try to create the inline data for the new dir.
+ * If it succeeds, return 0, otherwise return the error.
+ * In case of ENOSPC, the caller should create the normal disk layout dir.
+ */
+int ext4_try_create_inline_dir(handle_t *handle, struct inode *parent,
+ struct inode *inode)
+{
+ int ret, inline_size = EXT4_MIN_INLINE_DATA_SIZE;
+ struct ext4_iloc iloc;
+ struct ext4_dir_entry_2 *de;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret)
+ return ret;
+
+ ret = ext4_prepare_inline_data(handle, inode, inline_size);
+ if (ret)
+ goto out;
+
+ /*
+ * For inline dir, we only save the inode information for the ".."
+ * and create a fake dentry to cover the left space.
+ */
+ de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
+ de->inode = cpu_to_le32(parent->i_ino);
+ de = (struct ext4_dir_entry_2 *)((void *)de + EXT4_INLINE_DOTDOT_SIZE);
+ de->inode = 0;
+ de->rec_len = ext4_rec_len_to_disk(
+ inline_size - EXT4_INLINE_DOTDOT_SIZE,
+ inline_size);
+ set_nlink(inode, 2);
+ inode->i_size = EXT4_I(inode)->i_disksize = inline_size;
+out:
+ brelse(iloc.bh);
+ return ret;
+}
+
+struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir,
+ int *has_inline_data)
+{
+ int ret;
+ struct ext4_iloc iloc;
+ void *inline_start;
+ int inline_size;
+
+ if (ext4_get_inode_loc(dir, &iloc))
+ return NULL;
+
+ down_read(&EXT4_I(dir)->xattr_sem);
+ if (!ext4_has_inline_data(dir)) {
+ *has_inline_data = 0;
+ goto out;
+ }
+
+ inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
+ EXT4_INLINE_DOTDOT_SIZE;
+ inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE;
+ ret = search_dir(iloc.bh, inline_start, inline_size,
+ dir, d_name, 0, res_dir);
+ if (ret == 1)
+ goto out_find;
+ if (ret < 0)
+ goto out;
+
+ if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE)
+ goto out;
+
+ inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+ inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE;
+
+ ret = search_dir(iloc.bh, inline_start, inline_size,
+ dir, d_name, 0, res_dir);
+ if (ret == 1)
+ goto out_find;
+
+out:
+ brelse(iloc.bh);
+ iloc.bh = NULL;
+out_find:
+ up_read(&EXT4_I(dir)->xattr_sem);
+ return iloc.bh;
+}
+
+int ext4_delete_inline_entry(handle_t *handle,
+ struct inode *dir,
+ struct ext4_dir_entry_2 *de_del,
+ struct buffer_head *bh,
+ int *has_inline_data)
+{
+ int err, inline_size;
+ struct ext4_iloc iloc;
+ void *inline_start;
+
+ err = ext4_get_inode_loc(dir, &iloc);
+ if (err)
+ return err;
+
+ down_write(&EXT4_I(dir)->xattr_sem);
+ if (!ext4_has_inline_data(dir)) {
+ *has_inline_data = 0;
+ goto out;
+ }
+
+ if ((void *)de_del - ((void *)ext4_raw_inode(&iloc)->i_block) <
+ EXT4_MIN_INLINE_DATA_SIZE) {
+ inline_start = (void *)ext4_raw_inode(&iloc)->i_block +
+ EXT4_INLINE_DOTDOT_SIZE;
+ inline_size = EXT4_MIN_INLINE_DATA_SIZE -
+ EXT4_INLINE_DOTDOT_SIZE;
+ } else {
+ inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+ inline_size = ext4_get_inline_size(dir) -
+ EXT4_MIN_INLINE_DATA_SIZE;
+ }
+
+ err = ext4_journal_get_write_access(handle, bh);
+ if (err)
+ goto out;
+
+ err = ext4_generic_delete_entry(handle, dir, de_del, bh,
+ inline_start, inline_size, 0);
+ if (err)
+ goto out;
+
+ BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
+ err = ext4_mark_inode_dirty(handle, dir);
+ if (unlikely(err))
+ goto out;
+
+ ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size);
+out:
+ up_write(&EXT4_I(dir)->xattr_sem);
+ brelse(iloc.bh);
+ if (err != -ENOENT)
+ ext4_std_error(dir->i_sb, err);
+ return err;
+}
+
+/*
+ * Get the inline dentry at offset.
+ */
+static inline struct ext4_dir_entry_2 *
+ext4_get_inline_entry(struct inode *inode,
+ struct ext4_iloc *iloc,
+ unsigned int offset,
+ void **inline_start,
+ int *inline_size)
+{
+ void *inline_pos;
+
+ BUG_ON(offset > ext4_get_inline_size(inode));
+
+ if (offset < EXT4_MIN_INLINE_DATA_SIZE) {
+ inline_pos = (void *)ext4_raw_inode(iloc)->i_block;
+ *inline_size = EXT4_MIN_INLINE_DATA_SIZE;
+ } else {
+ inline_pos = ext4_get_inline_xattr_pos(inode, iloc);
+ offset -= EXT4_MIN_INLINE_DATA_SIZE;
+ *inline_size = ext4_get_inline_size(inode) -
+ EXT4_MIN_INLINE_DATA_SIZE;
+ }
+
+ if (inline_start)
+ *inline_start = inline_pos;
+ return (struct ext4_dir_entry_2 *)(inline_pos + offset);
+}
+
+int empty_inline_dir(struct inode *dir, int *has_inline_data)
+{
+ int err, inline_size;
+ struct ext4_iloc iloc;
+ void *inline_pos;
+ unsigned int offset;
+ struct ext4_dir_entry_2 *de;
+ int ret = 1;
+
+ err = ext4_get_inode_loc(dir, &iloc);
+ if (err) {
+ EXT4_ERROR_INODE(dir, "error %d getting inode %lu block",
+ err, dir->i_ino);
+ return 1;
+ }
+
+ down_read(&EXT4_I(dir)->xattr_sem);
+ if (!ext4_has_inline_data(dir)) {
+ *has_inline_data = 0;
+ goto out;
+ }
+
+ de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block;
+ if (!le32_to_cpu(de->inode)) {
+ ext4_warning(dir->i_sb,
+ "bad inline directory (dir #%lu) - no `..'",
+ dir->i_ino);
+ ret = 1;
+ goto out;
+ }
+
+ offset = EXT4_INLINE_DOTDOT_SIZE;
+ while (offset < dir->i_size) {
+ de = ext4_get_inline_entry(dir, &iloc, offset,
+ &inline_pos, &inline_size);
+ if (ext4_check_dir_entry(dir, NULL, de,
+ iloc.bh, inline_pos,
+ inline_size, offset)) {
+ ext4_warning(dir->i_sb,
+ "bad inline directory (dir #%lu) - "
+ "inode %u, rec_len %u, name_len %d"
+ "inline size %d\n",
+ dir->i_ino, le32_to_cpu(de->inode),
+ le16_to_cpu(de->rec_len), de->name_len,
+ inline_size);
+ ret = 1;
+ goto out;
+ }
+ if (le32_to_cpu(de->inode)) {
+ ret = 0;
+ goto out;
+ }
+ offset += ext4_rec_len_from_disk(de->rec_len, inline_size);
+ }
+
+out:
+ up_read(&EXT4_I(dir)->xattr_sem);
+ brelse(iloc.bh);
+ return ret;
+}
+
+int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
+{
+ int ret;
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ ret = ext4_destroy_inline_data_nolock(handle, inode);
+ up_write(&EXT4_I(inode)->xattr_sem);
+
+ return ret;
+}
+
+int ext4_inline_data_fiemap(struct inode *inode,
+ struct fiemap_extent_info *fieinfo,
+ int *has_inline)
+{
+ __u64 physical = 0;
+ __u64 length;
+ __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST;
+ int error = 0;
+ struct ext4_iloc iloc;
+
+ down_read(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ *has_inline = 0;
+ goto out;
+ }
+
+ error = ext4_get_inode_loc(inode, &iloc);
+ if (error)
+ goto out;
+
+ physical = iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits;
+ physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data;
+ physical += offsetof(struct ext4_inode, i_block);
+ length = i_size_read(inode);
+
+ if (physical)
+ error = fiemap_fill_next_extent(fieinfo, 0, physical,
+ length, flags);
+ brelse(iloc.bh);
+out:
+ up_read(&EXT4_I(inode)->xattr_sem);
+ return (error < 0 ? error : 0);
+}
+
+/*
+ * Called during xattr set, and if we can sparse space 'needed',
+ * just create the extent tree evict the data to the outer block.
+ *
+ * We use jbd2 instead of page cache to move data to the 1st block
+ * so that the whole transaction can be committed as a whole and
+ * the data isn't lost because of the delayed page cache write.
+ */
+int ext4_try_to_evict_inline_data(handle_t *handle,
+ struct inode *inode,
+ int needed)
+{
+ int error;
+ struct ext4_xattr_entry *entry;
+ struct ext4_xattr_ibody_header *header;
+ struct ext4_inode *raw_inode;
+ struct ext4_iloc iloc;
+
+ error = ext4_get_inode_loc(inode, &iloc);
+ if (error)
+ return error;
+
+ raw_inode = ext4_raw_inode(&iloc);
+ header = IHDR(inode, raw_inode);
+ entry = (struct ext4_xattr_entry *)((void *)raw_inode +
+ EXT4_I(inode)->i_inline_off);
+ if (EXT4_XATTR_LEN(entry->e_name_len) +
+ EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size)) < needed) {
+ error = -ENOSPC;
+ goto out;
+ }
+
+ error = ext4_convert_inline_data_nolock(handle, inode, &iloc);
+out:
+ brelse(iloc.bh);
+ return error;
+}
+
+void ext4_inline_data_truncate(struct inode *inode, int *has_inline)
+{
+ handle_t *handle;
+ int inline_size, value_len, needed_blocks;
+ size_t i_size;
+ void *value = NULL;
+ struct ext4_xattr_ibody_find is = {
+ .s = { .not_found = -ENODATA, },
+ };
+ struct ext4_xattr_info i = {
+ .name_index = EXT4_XATTR_INDEX_SYSTEM,
+ .name = EXT4_XATTR_SYSTEM_DATA,
+ };
+
+
+ needed_blocks = ext4_writepage_trans_blocks(inode);
+ handle = ext4_journal_start(inode, needed_blocks);
+ if (IS_ERR(handle))
+ return;
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ *has_inline = 0;
+ ext4_journal_stop(handle);
+ return;
+ }
+
+ if (ext4_orphan_add(handle, inode))
+ goto out;
+
+ if (ext4_get_inode_loc(inode, &is.iloc))
+ goto out;
+
+ down_write(&EXT4_I(inode)->i_data_sem);
+ i_size = inode->i_size;
+ inline_size = ext4_get_inline_size(inode);
+ EXT4_I(inode)->i_disksize = i_size;
+
+ if (i_size < inline_size) {
+ /* Clear the content in the xattr space. */
+ if (inline_size > EXT4_MIN_INLINE_DATA_SIZE) {
+ if (ext4_xattr_ibody_find(inode, &i, &is))
+ goto out_error;
+
+ BUG_ON(is.s.not_found);
+
+ value_len = le32_to_cpu(is.s.here->e_value_size);
+ value = kmalloc(value_len, GFP_NOFS);
+ if (!value)
+ goto out_error;
+
+ if (ext4_xattr_ibody_get(inode, i.name_index, i.name,
+ value, value_len))
+ goto out_error;
+
+ i.value = value;
+ i.value_len = i_size > EXT4_MIN_INLINE_DATA_SIZE ?
+ i_size - EXT4_MIN_INLINE_DATA_SIZE : 0;
+ if (ext4_xattr_ibody_inline_set(handle, inode, &i, &is))
+ goto out_error;
+ }
+
+ /* Clear the content within i_blocks. */
+ if (i_size < EXT4_MIN_INLINE_DATA_SIZE)
+ memset(ext4_raw_inode(&is.iloc)->i_block + i_size, 0,
+ EXT4_MIN_INLINE_DATA_SIZE - i_size);
+
+ EXT4_I(inode)->i_inline_size = i_size <
+ EXT4_MIN_INLINE_DATA_SIZE ?
+ EXT4_MIN_INLINE_DATA_SIZE : i_size;
+ }
+
+out_error:
+ up_write(&EXT4_I(inode)->i_data_sem);
+out:
+ brelse(is.iloc.bh);
+ up_write(&EXT4_I(inode)->xattr_sem);
+ kfree(value);
+ if (inode->i_nlink)
+ ext4_orphan_del(handle, inode);
+
+ inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ ext4_mark_inode_dirty(handle, inode);
+ if (IS_SYNC(inode))
+ ext4_handle_sync(handle);
+
+ ext4_journal_stop(handle);
+ return;
+}
+
+int ext4_convert_inline_data(struct inode *inode)
+{
+ int error, needed_blocks;
+ handle_t *handle;
+ struct ext4_iloc iloc;
+
+ if (!ext4_has_inline_data(inode)) {
+ ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+ return 0;
+ }
+
+ needed_blocks = ext4_writepage_trans_blocks(inode);
+
+ iloc.bh = NULL;
+ error = ext4_get_inode_loc(inode, &iloc);
+ if (error)
+ return error;
+
+ handle = ext4_journal_start(inode, needed_blocks);
+ if (IS_ERR(handle)) {
+ error = PTR_ERR(handle);
+ goto out_free;
+ }
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ if (!ext4_has_inline_data(inode)) {
+ up_write(&EXT4_I(inode)->xattr_sem);
+ goto out;
+ }
+
+ error = ext4_convert_inline_data_nolock(handle, inode, &iloc);
+ up_write(&EXT4_I(inode)->xattr_sem);
+out:
+ ext4_journal_stop(handle);
+out_free:
+ brelse(iloc.bh);
+ return error;
+}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b3c243b9afa5..cbfe13bf5b2a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -484,49 +484,6 @@ static pgoff_t ext4_num_dirty_pages(struct inode *inode, pgoff_t idx,
}
/*
- * Sets the BH_Da_Mapped bit on the buffer heads corresponding to the given map.
- */
-static void set_buffers_da_mapped(struct inode *inode,
- struct ext4_map_blocks *map)
-{
- struct address_space *mapping = inode->i_mapping;
- struct pagevec pvec;
- int i, nr_pages;
- pgoff_t index, end;
-
- index = map->m_lblk >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
- end = (map->m_lblk + map->m_len - 1) >>
- (PAGE_CACHE_SHIFT - inode->i_blkbits);
-
- pagevec_init(&pvec, 0);
- while (index <= end) {
- nr_pages = pagevec_lookup(&pvec, mapping, index,
- min(end - index + 1,
- (pgoff_t)PAGEVEC_SIZE));
- if (nr_pages == 0)
- break;
- for (i = 0; i < nr_pages; i++) {
- struct page *page = pvec.pages[i];
- struct buffer_head *bh, *head;
-
- if (unlikely(page->mapping != mapping) ||
- !PageDirty(page))
- break;
-
- if (page_has_buffers(page)) {
- bh = head = page_buffers(page);
- do {
- set_buffer_da_mapped(bh);
- bh = bh->b_this_page;
- } while (bh != head);
- }
- index++;
- }
- pagevec_release(&pvec);
- }
-}
-
-/*
* The ext4_map_blocks() function tries to look up the requested blocks,
* and returns if the blocks are already mapped.
*
@@ -574,7 +531,16 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
up_read((&EXT4_I(inode)->i_data_sem));
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
- int ret = check_block_validity(inode, map);
+ int ret;
+ if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) {
+ /* delayed alloc may be allocated by fallocate and
+ * coverted to initialized by directIO.
+ * we need to handle delayed extent here.
+ */
+ down_write((&EXT4_I(inode)->i_data_sem));
+ goto delayed_mapped;
+ }
+ ret = check_block_validity(inode, map);
if (ret != 0)
return ret;
}
@@ -652,12 +618,15 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) {
ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
- /* If we have successfully mapped the delayed allocated blocks,
- * set the BH_Da_Mapped bit on them. Its important to do this
- * under the protection of i_data_sem.
- */
- if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED)
- set_buffers_da_mapped(inode, map);
+ if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
+ int ret;
+delayed_mapped:
+ /* delayed allocation blocks has been allocated */
+ ret = ext4_es_remove_extent(inode, map->m_lblk,
+ map->m_len);
+ if (ret < 0)
+ retval = ret;
+ }
}
up_write((&EXT4_I(inode)->i_data_sem));
@@ -680,10 +649,13 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock,
int ret = 0, started = 0;
int dio_credits;
+ if (ext4_has_inline_data(inode))
+ return -ERANGE;
+
map.m_lblk = iblock;
map.m_len = bh->b_size >> inode->i_blkbits;
- if (flags && !handle) {
+ if (flags && !(flags & EXT4_GET_BLOCKS_NO_LOCK) && !handle) {
/* Direct IO write... */
if (map.m_len > DIO_MAX_BLOCKS)
map.m_len = DIO_MAX_BLOCKS;
@@ -798,13 +770,13 @@ struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
return NULL;
}
-static int walk_page_buffers(handle_t *handle,
- struct buffer_head *head,
- unsigned from,
- unsigned to,
- int *partial,
- int (*fn)(handle_t *handle,
- struct buffer_head *bh))
+int ext4_walk_page_buffers(handle_t *handle,
+ struct buffer_head *head,
+ unsigned from,
+ unsigned to,
+ int *partial,
+ int (*fn)(handle_t *handle,
+ struct buffer_head *bh))
{
struct buffer_head *bh;
unsigned block_start, block_end;
@@ -854,8 +826,8 @@ static int walk_page_buffers(handle_t *handle,
* is elevated. We'll still have enough credits for the tiny quotafile
* write.
*/
-static int do_journal_get_write_access(handle_t *handle,
- struct buffer_head *bh)
+int do_journal_get_write_access(handle_t *handle,
+ struct buffer_head *bh)
{
int dirty = buffer_dirty(bh);
int ret;
@@ -878,7 +850,7 @@ static int do_journal_get_write_access(handle_t *handle,
return ret;
}
-static int ext4_get_block_write(struct inode *inode, sector_t iblock,
+static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
static int ext4_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
@@ -902,6 +874,17 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping,
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
+ if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+ ret = ext4_try_to_write_inline_data(mapping, inode, pos, len,
+ flags, pagep);
+ if (ret < 0)
+ goto out;
+ if (ret == 1) {
+ ret = 0;
+ goto out;
+ }
+ }
+
retry:
handle = ext4_journal_start(inode, needed_blocks);
if (IS_ERR(handle)) {
@@ -919,6 +902,7 @@ retry:
ret = -ENOMEM;
goto out;
}
+
*pagep = page;
if (ext4_should_dioread_nolock(inode))
@@ -927,8 +911,9 @@ retry:
ret = __block_write_begin(page, pos, len, ext4_get_block);
if (!ret && ext4_should_journal_data(inode)) {
- ret = walk_page_buffers(handle, page_buffers(page),
- from, to, NULL, do_journal_get_write_access);
+ ret = ext4_walk_page_buffers(handle, page_buffers(page),
+ from, to, NULL,
+ do_journal_get_write_access);
}
if (ret) {
@@ -983,7 +968,12 @@ static int ext4_generic_write_end(struct file *file,
struct inode *inode = mapping->host;
handle_t *handle = ext4_journal_current_handle();
- copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
+ if (ext4_has_inline_data(inode))
+ copied = ext4_write_inline_data_end(inode, pos, len,
+ copied, page);
+ else
+ copied = block_write_end(file, mapping, pos,
+ len, copied, page, fsdata);
/*
* No need to use i_size_read() here, the i_size
@@ -1134,16 +1124,21 @@ static int ext4_journalled_write_end(struct file *file,
BUG_ON(!ext4_handle_valid(handle));
- if (copied < len) {
- if (!PageUptodate(page))
- copied = 0;
- page_zero_new_buffers(page, from+copied, to);
- }
+ if (ext4_has_inline_data(inode))
+ copied = ext4_write_inline_data_end(inode, pos, len,
+ copied, page);
+ else {
+ if (copied < len) {
+ if (!PageUptodate(page))
+ copied = 0;
+ page_zero_new_buffers(page, from+copied, to);
+ }
- ret = walk_page_buffers(handle, page_buffers(page), from,
- to, &partial, write_end_fn);
- if (!partial)
- SetPageUptodate(page);
+ ret = ext4_walk_page_buffers(handle, page_buffers(page), from,
+ to, &partial, write_end_fn);
+ if (!partial)
+ SetPageUptodate(page);
+ }
new_i_size = pos + copied;
if (new_i_size > inode->i_size)
i_size_write(inode, pos+copied);
@@ -1301,6 +1296,7 @@ static void ext4_da_page_release_reservation(struct page *page,
struct inode *inode = page->mapping->host;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
int num_clusters;
+ ext4_fsblk_t lblk;
head = page_buffers(page);
bh = head;
@@ -1310,20 +1306,23 @@ static void ext4_da_page_release_reservation(struct page *page,
if ((offset <= curr_off) && (buffer_delay(bh))) {
to_release++;
clear_buffer_delay(bh);
- clear_buffer_da_mapped(bh);
}
curr_off = next_off;
} while ((bh = bh->b_this_page) != head);
+ if (to_release) {
+ lblk = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ ext4_es_remove_extent(inode, lblk, to_release);
+ }
+
/* If we have released all the blocks belonging to a cluster, then we
* need to release the reserved space for that cluster. */
num_clusters = EXT4_NUM_B2C(sbi, to_release);
while (num_clusters > 0) {
- ext4_fsblk_t lblk;
lblk = (page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits)) +
((num_clusters - 1) << sbi->s_cluster_bits);
if (sbi->s_cluster_ratio == 1 ||
- !ext4_find_delalloc_cluster(inode, lblk, 1))
+ !ext4_find_delalloc_cluster(inode, lblk))
ext4_da_release_space(inode, 1);
num_clusters--;
@@ -1429,8 +1428,6 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd,
clear_buffer_delay(bh);
bh->b_blocknr = pblock;
}
- if (buffer_da_mapped(bh))
- clear_buffer_da_mapped(bh);
if (buffer_unwritten(bh) ||
buffer_mapped(bh))
BUG_ON(bh->b_blocknr != pblock);
@@ -1500,9 +1497,16 @@ static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd)
struct pagevec pvec;
struct inode *inode = mpd->inode;
struct address_space *mapping = inode->i_mapping;
+ ext4_lblk_t start, last;
index = mpd->first_page;
end = mpd->next_page - 1;
+
+ start = index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ last = end << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ ext4_es_remove_extent(inode, start, last - start + 1);
+
+ pagevec_init(&pvec, 0);
while (index <= end) {
nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE);
if (nr_pages == 0)
@@ -1656,15 +1660,6 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd)
for (i = 0; i < map.m_len; i++)
unmap_underlying_metadata(bdev, map.m_pblk + i);
-
- if (ext4_should_order_data(mpd->inode)) {
- err = ext4_jbd2_file_inode(handle, mpd->inode);
- if (err) {
- /* Only if the journal is aborted */
- mpd->retval = err;
- goto submit_io;
- }
- }
}
/*
@@ -1795,7 +1790,19 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
* file system block.
*/
down_read((&EXT4_I(inode)->i_data_sem));
- if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
+ if (ext4_has_inline_data(inode)) {
+ /*
+ * We will soon create blocks for this page, and let
+ * us pretend as if the blocks aren't allocated yet.
+ * In case of clusters, we have to handle the work
+ * of mapping from cluster so that the reserved space
+ * is calculated properly.
+ */
+ if ((EXT4_SB(inode->i_sb)->s_cluster_ratio > 1) &&
+ ext4_find_delalloc_cluster(inode, map->m_lblk))
+ map->m_flags |= EXT4_MAP_FROM_CLUSTER;
+ retval = 0;
+ } else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
retval = ext4_ext_map_blocks(NULL, inode, map, 0);
else
retval = ext4_ind_map_blocks(NULL, inode, map, 0);
@@ -1814,6 +1821,10 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
goto out_unlock;
}
+ retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len);
+ if (retval)
+ goto out_unlock;
+
/* Clear EXT4_MAP_FROM_CLUSTER flag since its purpose is served
* and it should not appear on the bh->b_state.
*/
@@ -1842,8 +1853,8 @@ out_unlock:
* We also have b_blocknr = physicalblock mapping unwritten extent and b_bdev
* initialized properly.
*/
-static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
- struct buffer_head *bh, int create)
+int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh, int create)
{
struct ext4_map_blocks map;
int ret = 0;
@@ -1917,15 +1928,29 @@ static int __ext4_journalled_writepage(struct page *page,
{
struct address_space *mapping = page->mapping;
struct inode *inode = mapping->host;
- struct buffer_head *page_bufs;
+ struct buffer_head *page_bufs = NULL;
handle_t *handle = NULL;
- int ret = 0;
- int err;
+ int ret = 0, err = 0;
+ int inline_data = ext4_has_inline_data(inode);
+ struct buffer_head *inode_bh = NULL;
ClearPageChecked(page);
- page_bufs = page_buffers(page);
- BUG_ON(!page_bufs);
- walk_page_buffers(handle, page_bufs, 0, len, NULL, bget_one);
+
+ if (inline_data) {
+ BUG_ON(page->index != 0);
+ BUG_ON(len > ext4_get_max_inline_size(inode));
+ inode_bh = ext4_journalled_write_inline_data(inode, len, page);
+ if (inode_bh == NULL)
+ goto out;
+ } else {
+ page_bufs = page_buffers(page);
+ if (!page_bufs) {
+ BUG();
+ goto out;
+ }
+ ext4_walk_page_buffers(handle, page_bufs, 0, len,
+ NULL, bget_one);
+ }
/* As soon as we unlock the page, it can go away, but we have
* references to buffers so we are safe */
unlock_page(page);
@@ -1938,11 +1963,18 @@ static int __ext4_journalled_writepage(struct page *page,
BUG_ON(!ext4_handle_valid(handle));
- ret = walk_page_buffers(handle, page_bufs, 0, len, NULL,
- do_journal_get_write_access);
+ if (inline_data) {
+ ret = ext4_journal_get_write_access(handle, inode_bh);
- err = walk_page_buffers(handle, page_bufs, 0, len, NULL,
- write_end_fn);
+ err = ext4_handle_dirty_metadata(handle, inode, inode_bh);
+
+ } else {
+ ret = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL,
+ do_journal_get_write_access);
+
+ err = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL,
+ write_end_fn);
+ }
if (ret == 0)
ret = err;
EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid;
@@ -1950,9 +1982,12 @@ static int __ext4_journalled_writepage(struct page *page,
if (!ret)
ret = err;
- walk_page_buffers(handle, page_bufs, 0, len, NULL, bput_one);
+ if (!ext4_has_inline_data(inode))
+ ext4_walk_page_buffers(handle, page_bufs, 0, len,
+ NULL, bput_one);
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
out:
+ brelse(inode_bh);
return ret;
}
@@ -2029,8 +2064,8 @@ static int ext4_writepage(struct page *page,
commit_write = 1;
}
page_bufs = page_buffers(page);
- if (walk_page_buffers(NULL, page_bufs, 0, len, NULL,
- ext4_bh_delay_or_unwritten)) {
+ if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL,
+ ext4_bh_delay_or_unwritten)) {
/*
* We don't want to do block allocation, so redirty
* the page and return. We may reach here when we do
@@ -2096,7 +2131,8 @@ static int ext4_da_writepages_trans_blocks(struct inode *inode)
* mpage_da_map_and_submit to map a single contiguous memory region
* and then write them.
*/
-static int write_cache_pages_da(struct address_space *mapping,
+static int write_cache_pages_da(handle_t *handle,
+ struct address_space *mapping,
struct writeback_control *wbc,
struct mpage_da_data *mpd,
pgoff_t *done_index)
@@ -2175,6 +2211,17 @@ static int write_cache_pages_da(struct address_space *mapping,
wait_on_page_writeback(page);
BUG_ON(PageWriteback(page));
+ /*
+ * If we have inline data and arrive here, it means that
+ * we will soon create the block for the 1st page, so
+ * we'd better clear the inline data here.
+ */
+ if (ext4_has_inline_data(inode)) {
+ BUG_ON(ext4_test_inode_state(inode,
+ EXT4_STATE_MAY_INLINE_DATA));
+ ext4_destroy_inline_data(handle, inode);
+ }
+
if (mpd->next_page != page->index)
mpd->first_page = page->index;
mpd->next_page = page->index + 1;
@@ -2381,7 +2428,8 @@ retry:
* contiguous region of logical blocks that need
* blocks to be allocated by ext4 and submit them.
*/
- ret = write_cache_pages_da(mapping, wbc, &mpd, &done_index);
+ ret = write_cache_pages_da(handle, mapping,
+ wbc, &mpd, &done_index);
/*
* If we have a contiguous extent of pages and we
* haven't done the I/O yet, map the blocks and submit
@@ -2445,7 +2493,6 @@ out_writepages:
return ret;
}
-#define FALL_BACK_TO_NONDELALLOC 1
static int ext4_nonda_switch(struct super_block *sb)
{
s64 free_blocks, dirty_blocks;
@@ -2502,6 +2549,19 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
}
*fsdata = (void *)0;
trace_ext4_da_write_begin(inode, pos, len, flags);
+
+ if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+ ret = ext4_da_write_inline_data_begin(mapping, inode,
+ pos, len, flags,
+ pagep, fsdata);
+ if (ret < 0)
+ goto out;
+ if (ret == 1) {
+ ret = 0;
+ goto out;
+ }
+ }
+
retry:
/*
* With delayed allocation, we don't log the i_disksize update
@@ -2603,22 +2663,13 @@ static int ext4_da_write_end(struct file *file,
* changes. So let's piggyback the i_disksize mark_inode_dirty
* into that.
*/
-
new_i_size = pos + copied;
if (copied && new_i_size > EXT4_I(inode)->i_disksize) {
- if (ext4_da_should_update_i_disksize(page, end)) {
+ if (ext4_has_inline_data(inode) ||
+ ext4_da_should_update_i_disksize(page, end)) {
down_write(&EXT4_I(inode)->i_data_sem);
- if (new_i_size > EXT4_I(inode)->i_disksize) {
- /*
- * Updating i_disksize when extending file
- * without needing block allocation
- */
- if (ext4_should_order_data(inode))
- ret = ext4_jbd2_file_inode(handle,
- inode);
-
+ if (new_i_size > EXT4_I(inode)->i_disksize)
EXT4_I(inode)->i_disksize = new_i_size;
- }
up_write(&EXT4_I(inode)->i_data_sem);
/* We need to mark inode dirty even if
* new_i_size is less that inode->i_size
@@ -2627,8 +2678,16 @@ static int ext4_da_write_end(struct file *file,
ext4_mark_inode_dirty(handle, inode);
}
}
- ret2 = generic_write_end(file, mapping, pos, len, copied,
+
+ if (write_mode != CONVERT_INLINE_DATA &&
+ ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) &&
+ ext4_has_inline_data(inode))
+ ret2 = ext4_da_write_inline_data_end(inode, pos, len, copied,
+ page);
+ else
+ ret2 = generic_write_end(file, mapping, pos, len, copied,
page, fsdata);
+
copied = ret2;
if (ret2 < 0)
ret = ret2;
@@ -2721,6 +2780,12 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
journal_t *journal;
int err;
+ /*
+ * We can get here for an inline file via the FIBMAP ioctl
+ */
+ if (ext4_has_inline_data(inode))
+ return 0;
+
if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) &&
test_opt(inode->i_sb, DELALLOC)) {
/*
@@ -2766,14 +2831,30 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block)
static int ext4_readpage(struct file *file, struct page *page)
{
+ int ret = -EAGAIN;
+ struct inode *inode = page->mapping->host;
+
trace_ext4_readpage(page);
- return mpage_readpage(page, ext4_get_block);
+
+ if (ext4_has_inline_data(inode))
+ ret = ext4_readpage_inline(inode, page);
+
+ if (ret == -EAGAIN)
+ return mpage_readpage(page, ext4_get_block);
+
+ return ret;
}
static int
ext4_readpages(struct file *file, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
+ struct inode *inode = mapping->host;
+
+ /* If the file has inline data, no need to do readpages. */
+ if (ext4_has_inline_data(inode))
+ return 0;
+
return mpage_readpages(mapping, pages, nr_pages, ext4_get_block);
}
@@ -2799,8 +2880,6 @@ static void ext4_invalidatepage_free_endio(struct page *page, unsigned long offs
static void ext4_invalidatepage(struct page *page, unsigned long offset)
{
- journal_t *journal = EXT4_JOURNAL(page->mapping->host);
-
trace_ext4_invalidatepage(page, offset);
/*
@@ -2808,16 +2887,34 @@ static void ext4_invalidatepage(struct page *page, unsigned long offset)
*/
if (ext4_should_dioread_nolock(page->mapping->host))
ext4_invalidatepage_free_endio(page, offset);
+
+ /* No journalling happens on data buffers when this function is used */
+ WARN_ON(page_has_buffers(page) && buffer_jbd(page_buffers(page)));
+
+ block_invalidatepage(page, offset);
+}
+
+static int __ext4_journalled_invalidatepage(struct page *page,
+ unsigned long offset)
+{
+ journal_t *journal = EXT4_JOURNAL(page->mapping->host);
+
+ trace_ext4_journalled_invalidatepage(page, offset);
+
/*
* If it's a full truncate we just forget about the pending dirtying
*/
if (offset == 0)
ClearPageChecked(page);
- if (journal)
- jbd2_journal_invalidatepage(journal, page, offset);
- else
- block_invalidatepage(page, offset);
+ return jbd2_journal_invalidatepage(journal, page, offset);
+}
+
+/* Wrapper for aops... */
+static void ext4_journalled_invalidatepage(struct page *page,
+ unsigned long offset)
+{
+ WARN_ON(__ext4_journalled_invalidatepage(page, offset) < 0);
}
static int ext4_releasepage(struct page *page, gfp_t wait)
@@ -2840,7 +2937,7 @@ static int ext4_releasepage(struct page *page, gfp_t wait)
* We allocate an uinitialized extent if blocks haven't been allocated.
* The extent will be converted to initialized after the IO is complete.
*/
-static int ext4_get_block_write(struct inode *inode, sector_t iblock,
+int ext4_get_block_write(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
ext4_debug("ext4_get_block_write: inode %lu, create flag %d\n",
@@ -2850,29 +2947,12 @@ static int ext4_get_block_write(struct inode *inode, sector_t iblock,
}
static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int flags)
+ struct buffer_head *bh_result, int create)
{
- handle_t *handle = ext4_journal_current_handle();
- struct ext4_map_blocks map;
- int ret = 0;
-
- ext4_debug("ext4_get_block_write_nolock: inode %lu, flag %d\n",
- inode->i_ino, flags);
-
- flags = EXT4_GET_BLOCKS_NO_LOCK;
-
- map.m_lblk = iblock;
- map.m_len = bh_result->b_size >> inode->i_blkbits;
-
- ret = ext4_map_blocks(handle, inode, &map, flags);
- if (ret > 0) {
- map_bh(bh_result, inode->i_sb, map.m_pblk);
- bh_result->b_state = (bh_result->b_state & ~EXT4_MAP_FLAGS) |
- map.m_flags;
- bh_result->b_size = inode->i_sb->s_blocksize * map.m_len;
- ret = 0;
- }
- return ret;
+ ext4_debug("ext4_get_block_write_nolock: inode %lu, create flag %d\n",
+ inode->i_ino, create);
+ return _ext4_get_block(inode, iblock, bh_result,
+ EXT4_GET_BLOCKS_NO_LOCK);
}
static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
@@ -2978,10 +3058,10 @@ retry:
* fall back to buffered IO.
*
* For holes, we fallocate those blocks, mark them as uninitialized
- * If those blocks were preallocated, we mark sure they are splited, but
+ * If those blocks were preallocated, we mark sure they are split, but
* still keep the range to write as uninitialized.
*
- * The unwrritten extents will be converted to written when DIO is completed.
+ * The unwritten extents will be converted to written when DIO is completed.
* For async direct IO, since the IO may still pending when return, we
* set up an end_io call back function, which will do the conversion
* when async direct IO completed.
@@ -2999,125 +3079,120 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
struct inode *inode = file->f_mapping->host;
ssize_t ret;
size_t count = iov_length(iov, nr_segs);
-
+ int overwrite = 0;
+ get_block_t *get_block_func = NULL;
+ int dio_flags = 0;
loff_t final_size = offset + count;
- if (rw == WRITE && final_size <= inode->i_size) {
- int overwrite = 0;
- BUG_ON(iocb->private == NULL);
+ /* Use the old path for reads and writes beyond i_size. */
+ if (rw != WRITE || final_size > inode->i_size)
+ return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
- /* If we do a overwrite dio, i_mutex locking can be released */
- overwrite = *((int *)iocb->private);
+ BUG_ON(iocb->private == NULL);
- if (overwrite) {
- atomic_inc(&inode->i_dio_count);
- down_read(&EXT4_I(inode)->i_data_sem);
- mutex_unlock(&inode->i_mutex);
- }
+ /* If we do a overwrite dio, i_mutex locking can be released */
+ overwrite = *((int *)iocb->private);
- /*
- * We could direct write to holes and fallocate.
- *
- * Allocated blocks to fill the hole are marked as uninitialized
- * to prevent parallel buffered read to expose the stale data
- * before DIO complete the data IO.
- *
- * As to previously fallocated extents, ext4 get_block
- * will just simply mark the buffer mapped but still
- * keep the extents uninitialized.
- *
- * for non AIO case, we will convert those unwritten extents
- * to written after return back from blockdev_direct_IO.
- *
- * for async DIO, the conversion needs to be defered when
- * the IO is completed. The ext4 end_io callback function
- * will be called to take care of the conversion work.
- * Here for async case, we allocate an io_end structure to
- * hook to the iocb.
- */
- iocb->private = NULL;
- ext4_inode_aio_set(inode, NULL);
- if (!is_sync_kiocb(iocb)) {
- ext4_io_end_t *io_end =
- ext4_init_io_end(inode, GFP_NOFS);
- if (!io_end) {
- ret = -ENOMEM;
- goto retake_lock;
- }
- io_end->flag |= EXT4_IO_END_DIRECT;
- iocb->private = io_end;
- /*
- * we save the io structure for current async
- * direct IO, so that later ext4_map_blocks()
- * could flag the io structure whether there
- * is a unwritten extents needs to be converted
- * when IO is completed.
- */
- ext4_inode_aio_set(inode, io_end);
- }
+ if (overwrite) {
+ atomic_inc(&inode->i_dio_count);
+ down_read(&EXT4_I(inode)->i_data_sem);
+ mutex_unlock(&inode->i_mutex);
+ }
- if (overwrite)
- ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iov,
- offset, nr_segs,
- ext4_get_block_write_nolock,
- ext4_end_io_dio,
- NULL,
- 0);
- else
- ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iov,
- offset, nr_segs,
- ext4_get_block_write,
- ext4_end_io_dio,
- NULL,
- DIO_LOCKING);
- if (iocb->private)
- ext4_inode_aio_set(inode, NULL);
+ /*
+ * We could direct write to holes and fallocate.
+ *
+ * Allocated blocks to fill the hole are marked as
+ * uninitialized to prevent parallel buffered read to expose
+ * the stale data before DIO complete the data IO.
+ *
+ * As to previously fallocated extents, ext4 get_block will
+ * just simply mark the buffer mapped but still keep the
+ * extents uninitialized.
+ *
+ * For non AIO case, we will convert those unwritten extents
+ * to written after return back from blockdev_direct_IO.
+ *
+ * For async DIO, the conversion needs to be deferred when the
+ * IO is completed. The ext4 end_io callback function will be
+ * called to take care of the conversion work. Here for async
+ * case, we allocate an io_end structure to hook to the iocb.
+ */
+ iocb->private = NULL;
+ ext4_inode_aio_set(inode, NULL);
+ if (!is_sync_kiocb(iocb)) {
+ ext4_io_end_t *io_end = ext4_init_io_end(inode, GFP_NOFS);
+ if (!io_end) {
+ ret = -ENOMEM;
+ goto retake_lock;
+ }
+ io_end->flag |= EXT4_IO_END_DIRECT;
+ iocb->private = io_end;
/*
- * The io_end structure takes a reference to the inode,
- * that structure needs to be destroyed and the
- * reference to the inode need to be dropped, when IO is
- * complete, even with 0 byte write, or failed.
- *
- * In the successful AIO DIO case, the io_end structure will be
- * desctroyed and the reference to the inode will be dropped
- * after the end_io call back function is called.
- *
- * In the case there is 0 byte write, or error case, since
- * VFS direct IO won't invoke the end_io call back function,
- * we need to free the end_io structure here.
+ * we save the io structure for current async direct
+ * IO, so that later ext4_map_blocks() could flag the
+ * io structure whether there is a unwritten extents
+ * needs to be converted when IO is completed.
*/
- if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) {
- ext4_free_io_end(iocb->private);
- iocb->private = NULL;
- } else if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
- EXT4_STATE_DIO_UNWRITTEN)) {
- int err;
- /*
- * for non AIO case, since the IO is already
- * completed, we could do the conversion right here
- */
- err = ext4_convert_unwritten_extents(inode,
- offset, ret);
- if (err < 0)
- ret = err;
- ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
- }
+ ext4_inode_aio_set(inode, io_end);
+ }
- retake_lock:
- /* take i_mutex locking again if we do a ovewrite dio */
- if (overwrite) {
- inode_dio_done(inode);
- up_read(&EXT4_I(inode)->i_data_sem);
- mutex_lock(&inode->i_mutex);
- }
+ if (overwrite) {
+ get_block_func = ext4_get_block_write_nolock;
+ } else {
+ get_block_func = ext4_get_block_write;
+ dio_flags = DIO_LOCKING;
+ }
+ ret = __blockdev_direct_IO(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
+ offset, nr_segs,
+ get_block_func,
+ ext4_end_io_dio,
+ NULL,
+ dio_flags);
+
+ if (iocb->private)
+ ext4_inode_aio_set(inode, NULL);
+ /*
+ * The io_end structure takes a reference to the inode, that
+ * structure needs to be destroyed and the reference to the
+ * inode need to be dropped, when IO is complete, even with 0
+ * byte write, or failed.
+ *
+ * In the successful AIO DIO case, the io_end structure will
+ * be destroyed and the reference to the inode will be dropped
+ * after the end_io call back function is called.
+ *
+ * In the case there is 0 byte write, or error case, since VFS
+ * direct IO won't invoke the end_io call back function, we
+ * need to free the end_io structure here.
+ */
+ if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) {
+ ext4_free_io_end(iocb->private);
+ iocb->private = NULL;
+ } else if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
+ EXT4_STATE_DIO_UNWRITTEN)) {
+ int err;
+ /*
+ * for non AIO case, since the IO is already
+ * completed, we could do the conversion right here
+ */
+ err = ext4_convert_unwritten_extents(inode,
+ offset, ret);
+ if (err < 0)
+ ret = err;
+ ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
+ }
- return ret;
+retake_lock:
+ /* take i_mutex locking again if we do a ovewrite dio */
+ if (overwrite) {
+ inode_dio_done(inode);
+ up_read(&EXT4_I(inode)->i_data_sem);
+ mutex_lock(&inode->i_mutex);
}
- /* for write the the end of file case, we fall back to old way */
- return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
+ return ret;
}
static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
@@ -3134,6 +3209,10 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
if (ext4_should_journal_data(inode))
return 0;
+ /* Let buffer I/O handle the inline data case. */
+ if (ext4_has_inline_data(inode))
+ return 0;
+
trace_ext4_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
ret = ext4_ext_direct_IO(rw, iocb, iov, offset, nr_segs);
@@ -3201,7 +3280,7 @@ static const struct address_space_operations ext4_journalled_aops = {
.write_end = ext4_journalled_write_end,
.set_page_dirty = ext4_journalled_set_page_dirty,
.bmap = ext4_bmap,
- .invalidatepage = ext4_invalidatepage,
+ .invalidatepage = ext4_journalled_invalidatepage,
.releasepage = ext4_releasepage,
.direct_IO = ext4_direct_IO,
.is_partially_uptodate = block_is_partially_uptodate,
@@ -3531,6 +3610,14 @@ void ext4_truncate(struct inode *inode)
if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC))
ext4_set_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
+ if (ext4_has_inline_data(inode)) {
+ int has_inline = 1;
+
+ ext4_inline_data_truncate(inode, &has_inline);
+ if (has_inline)
+ return;
+ }
+
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
ext4_ext_truncate(inode);
else
@@ -3756,6 +3843,19 @@ static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,
}
}
+static inline void ext4_iget_extra_inode(struct inode *inode,
+ struct ext4_inode *raw_inode,
+ struct ext4_inode_info *ei)
+{
+ __le32 *magic = (void *)raw_inode +
+ EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize;
+ if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
+ ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+ ext4_find_inline_data_nolock(inode);
+ } else
+ EXT4_I(inode)->i_inline_off = 0;
+}
+
struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
{
struct ext4_iloc iloc;
@@ -3826,6 +3926,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */
+ ei->i_inline_off = 0;
ei->i_dir_start_lookup = 0;
ei->i_dtime = le32_to_cpu(raw_inode->i_dtime);
/* We now have enough fields to check if the inode was active or not.
@@ -3898,11 +3999,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ei->i_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
} else {
- __le32 *magic = (void *)raw_inode +
- EXT4_GOOD_OLD_INODE_SIZE +
- ei->i_extra_isize;
- if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
- ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+ ext4_iget_extra_inode(inode, raw_inode, ei);
}
}
@@ -3925,17 +4022,19 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ei->i_file_acl);
ret = -EIO;
goto bad_inode;
- } else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
- if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- (S_ISLNK(inode->i_mode) &&
- !ext4_inode_is_fast_symlink(inode)))
- /* Validate extent which is part of inode */
- ret = ext4_ext_check_inode(inode);
- } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- (S_ISLNK(inode->i_mode) &&
- !ext4_inode_is_fast_symlink(inode))) {
- /* Validate block references which are part of inode */
- ret = ext4_ind_check_inode(inode);
+ } else if (!ext4_has_inline_data(inode)) {
+ if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
+ if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ (S_ISLNK(inode->i_mode) &&
+ !ext4_inode_is_fast_symlink(inode))))
+ /* Validate extent which is part of inode */
+ ret = ext4_ext_check_inode(inode);
+ } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ (S_ISLNK(inode->i_mode) &&
+ !ext4_inode_is_fast_symlink(inode))) {
+ /* Validate block references which are part of inode */
+ ret = ext4_ind_check_inode(inode);
+ }
}
if (ret)
goto bad_inode;
@@ -4122,9 +4221,10 @@ static int ext4_do_update_inode(handle_t *handle,
cpu_to_le32(new_encode_dev(inode->i_rdev));
raw_inode->i_block[2] = 0;
}
- } else
+ } else if (!ext4_has_inline_data(inode)) {
for (block = 0; block < EXT4_N_BLOCKS; block++)
raw_inode->i_block[block] = ei->i_data[block];
+ }
raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
if (ei->i_extra_isize) {
@@ -4221,6 +4321,47 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
}
/*
+ * In data=journal mode ext4_journalled_invalidatepage() may fail to invalidate
+ * buffers that are attached to a page stradding i_size and are undergoing
+ * commit. In that case we have to wait for commit to finish and try again.
+ */
+static void ext4_wait_for_tail_page_commit(struct inode *inode)
+{
+ struct page *page;
+ unsigned offset;
+ journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
+ tid_t commit_tid = 0;
+ int ret;
+
+ offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
+ /*
+ * All buffers in the last page remain valid? Then there's nothing to
+ * do. We do the check mainly to optimize the common PAGE_CACHE_SIZE ==
+ * blocksize case
+ */
+ if (offset > PAGE_CACHE_SIZE - (1 << inode->i_blkbits))
+ return;
+ while (1) {
+ page = find_lock_page(inode->i_mapping,
+ inode->i_size >> PAGE_CACHE_SHIFT);
+ if (!page)
+ return;
+ ret = __ext4_journalled_invalidatepage(page, offset);
+ unlock_page(page);
+ page_cache_release(page);
+ if (ret != -EBUSY)
+ return;
+ commit_tid = 0;
+ read_lock(&journal->j_state_lock);
+ if (journal->j_committing_transaction)
+ commit_tid = journal->j_committing_transaction->t_tid;
+ read_unlock(&journal->j_state_lock);
+ if (commit_tid)
+ jbd2_log_wait_commit(journal, commit_tid);
+ }
+}
+
+/*
* ext4_setattr()
*
* Called from notify_change.
@@ -4333,16 +4474,28 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
}
if (attr->ia_valid & ATTR_SIZE) {
- if (attr->ia_size != i_size_read(inode)) {
- truncate_setsize(inode, attr->ia_size);
- /* Inode size will be reduced, wait for dio in flight.
- * Temporarily disable dioread_nolock to prevent
- * livelock. */
+ if (attr->ia_size != inode->i_size) {
+ loff_t oldsize = inode->i_size;
+
+ i_size_write(inode, attr->ia_size);
+ /*
+ * Blocks are going to be removed from the inode. Wait
+ * for dio in flight. Temporarily disable
+ * dioread_nolock to prevent livelock.
+ */
if (orphan) {
- ext4_inode_block_unlocked_dio(inode);
- inode_dio_wait(inode);
- ext4_inode_resume_unlocked_dio(inode);
+ if (!ext4_should_journal_data(inode)) {
+ ext4_inode_block_unlocked_dio(inode);
+ inode_dio_wait(inode);
+ ext4_inode_resume_unlocked_dio(inode);
+ } else
+ ext4_wait_for_tail_page_commit(inode);
}
+ /*
+ * Truncate pagecache after we've waited for commit
+ * in data=journal mode to make pages freeable.
+ */
+ truncate_pagecache(inode, oldsize, inode->i_size);
}
ext4_truncate(inode);
}
@@ -4811,8 +4964,9 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
* journal_start/journal_stop which can block and take a long time
*/
if (page_has_buffers(page)) {
- if (!walk_page_buffers(NULL, page_buffers(page), 0, len, NULL,
- ext4_bh_unmapped)) {
+ if (!ext4_walk_page_buffers(NULL, page_buffers(page),
+ 0, len, NULL,
+ ext4_bh_unmapped)) {
/* Wait so that we don't change page under IO */
wait_on_page_writeback(page);
ret = VM_FAULT_LOCKED;
@@ -4833,7 +4987,7 @@ retry_alloc:
}
ret = __block_page_mkwrite(vma, vmf, get_block);
if (!ret && ext4_should_journal_data(inode)) {
- if (walk_page_buffers(handle, page_buffers(page), 0,
+ if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) {
unlock_page(page);
ret = VM_FAULT_SIGBUS;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 526e55358606..1bf6fe785c4f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1373,7 +1373,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int block,
ex->fe_start += next;
while (needed > ex->fe_len &&
- (buddy = mb_find_buddy(e4b, order, &max))) {
+ mb_find_buddy(e4b, order, &max)) {
if (block + 1 >= max)
break;
@@ -2607,9 +2607,17 @@ static void ext4_free_data_callback(struct super_block *sb,
mb_debug(1, "gonna free %u blocks in group %u (0x%p):",
entry->efd_count, entry->efd_group, entry);
- if (test_opt(sb, DISCARD))
- ext4_issue_discard(sb, entry->efd_group,
- entry->efd_start_cluster, entry->efd_count);
+ if (test_opt(sb, DISCARD)) {
+ err = ext4_issue_discard(sb, entry->efd_group,
+ entry->efd_start_cluster,
+ entry->efd_count);
+ if (err && err != -EOPNOTSUPP)
+ ext4_msg(sb, KERN_WARNING, "discard request in"
+ " group:%d block:%d count:%d failed"
+ " with %d", entry->efd_group,
+ entry->efd_start_cluster,
+ entry->efd_count, err);
+ }
err = ext4_mb_load_buddy(sb, entry->efd_group, &e4b);
/* we expect to find existing buddy because it's pinned */
@@ -4310,8 +4318,10 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
repeat:
/* allocate space in core */
*errp = ext4_mb_regular_allocator(ac);
- if (*errp)
+ if (*errp) {
+ ext4_discard_allocated_blocks(ac);
goto errout;
+ }
/* as we've just preallocated more space than
* user requested orinally, we store allocated
@@ -4333,10 +4343,10 @@ repeat:
ac->ac_b_ex.fe_len = 0;
ac->ac_status = AC_STATUS_CONTINUE;
goto repeat;
- } else if (*errp)
- errout:
+ } else if (*errp) {
ext4_discard_allocated_blocks(ac);
- else {
+ goto errout;
+ } else {
block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
ar->len = ac->ac_b_ex.fe_len;
}
@@ -4347,6 +4357,7 @@ repeat:
*errp = -ENOSPC;
}
+errout:
if (*errp) {
ac->ac_b_ex.fe_len = 0;
ar->len = 0;
@@ -4656,8 +4667,16 @@ do_more:
* with group lock held. generate_buddy look at
* them with group lock_held
*/
- if (test_opt(sb, DISCARD))
- ext4_issue_discard(sb, block_group, bit, count);
+ if (test_opt(sb, DISCARD)) {
+ err = ext4_issue_discard(sb, block_group, bit, count);
+ if (err && err != -EOPNOTSUPP)
+ ext4_msg(sb, KERN_WARNING, "discard request in"
+ " group:%d block:%d count:%lu failed"
+ " with %d", block_group, bit, count,
+ err);
+ }
+
+
ext4_lock_group(sb, block_group);
mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
mb_free_blocks(inode, &e4b, bit, count_clusters);
@@ -4851,10 +4870,11 @@ error_return:
* one will allocate those blocks, mark it as used in buddy bitmap. This must
* be called with under the group lock.
*/
-static void ext4_trim_extent(struct super_block *sb, int start, int count,
+static int ext4_trim_extent(struct super_block *sb, int start, int count,
ext4_group_t group, struct ext4_buddy *e4b)
{
struct ext4_free_extent ex;
+ int ret = 0;
trace_ext4_trim_extent(sb, group, start, count);
@@ -4870,9 +4890,10 @@ static void ext4_trim_extent(struct super_block *sb, int start, int count,
*/
mb_mark_used(e4b, &ex);
ext4_unlock_group(sb, group);
- ext4_issue_discard(sb, group, start, count);
+ ret = ext4_issue_discard(sb, group, start, count);
ext4_lock_group(sb, group);
mb_free_blocks(NULL, e4b, start, ex.fe_len);
+ return ret;
}
/**
@@ -4901,7 +4922,7 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
void *bitmap;
ext4_grpblk_t next, count = 0, free_count = 0;
struct ext4_buddy e4b;
- int ret;
+ int ret = 0;
trace_ext4_trim_all_free(sb, group, start, max);
@@ -4928,8 +4949,11 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
next = mb_find_next_bit(bitmap, max + 1, start);
if ((next - start) >= minblocks) {
- ext4_trim_extent(sb, start,
- next - start, group, &e4b);
+ ret = ext4_trim_extent(sb, start,
+ next - start, group, &e4b);
+ if (ret && ret != -EOPNOTSUPP)
+ break;
+ ret = 0;
count += next - start;
}
free_count += next - start;
@@ -4950,8 +4974,10 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
break;
}
- if (!ret)
+ if (!ret) {
+ ret = count;
EXT4_MB_GRP_SET_TRIMMED(e4b.bd_info);
+ }
out:
ext4_unlock_group(sb, group);
ext4_mb_unload_buddy(&e4b);
@@ -4959,7 +4985,7 @@ out:
ext4_debug("trimmed %d blocks in the group %d\n",
count, group);
- return count;
+ return ret;
}
/**
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index f1bb32ec0169..db8226d595fa 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include "ext4_jbd2.h"
+#include "ext4_extents.h"
/*
* The contiguous blocks details which can be
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 292daeeed455..d9cc5ee42f53 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -18,6 +18,7 @@
#include <linux/slab.h>
#include "ext4_jbd2.h"
#include "ext4.h"
+#include "ext4_extents.h"
/**
* get_ext_path - Find an extent path for designated logical block number.
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6d600a69fc9d..f9ed946a448e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -202,13 +202,8 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *inode);
/* checksumming functions */
-#define EXT4_DIRENT_TAIL(block, blocksize) \
- ((struct ext4_dir_entry_tail *)(((void *)(block)) + \
- ((blocksize) - \
- sizeof(struct ext4_dir_entry_tail))))
-
-static void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
- unsigned int blocksize)
+void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
+ unsigned int blocksize)
{
memset(t, 0, sizeof(struct ext4_dir_entry_tail));
t->det_rec_len = ext4_rec_len_to_disk(
@@ -261,6 +256,12 @@ static __le32 ext4_dirent_csum(struct inode *inode,
return cpu_to_le32(csum);
}
+static void warn_no_space_for_csum(struct inode *inode)
+{
+ ext4_warning(inode->i_sb, "no space in directory inode %lu leaf for "
+ "checksum. Please run e2fsck -D.", inode->i_ino);
+}
+
int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
{
struct ext4_dir_entry_tail *t;
@@ -271,8 +272,7 @@ int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
t = get_dirent_tail(inode, dirent);
if (!t) {
- EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir "
- "leaf for checksum. Please run e2fsck -D.");
+ warn_no_space_for_csum(inode);
return 0;
}
@@ -294,8 +294,7 @@ static void ext4_dirent_csum_set(struct inode *inode,
t = get_dirent_tail(inode, dirent);
if (!t) {
- EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir "
- "leaf for checksum. Please run e2fsck -D.");
+ warn_no_space_for_csum(inode);
return;
}
@@ -303,9 +302,9 @@ static void ext4_dirent_csum_set(struct inode *inode,
(void *)t - (void *)dirent);
}
-static inline int ext4_handle_dirty_dirent_node(handle_t *handle,
- struct inode *inode,
- struct buffer_head *bh)
+int ext4_handle_dirty_dirent_node(handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *bh)
{
ext4_dirent_csum_set(inode, (struct ext4_dir_entry *)bh->b_data);
return ext4_handle_dirty_metadata(handle, inode, bh);
@@ -377,8 +376,7 @@ static int ext4_dx_csum_verify(struct inode *inode,
count = le16_to_cpu(c->count);
if (count_offset + (limit * sizeof(struct dx_entry)) >
EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) {
- EXT4_ERROR_INODE(inode, "metadata_csum set but no space for "
- "tree checksum found. Run e2fsck -D.");
+ warn_no_space_for_csum(inode);
return 1;
}
t = (struct dx_tail *)(((struct dx_entry *)c) + limit);
@@ -408,8 +406,7 @@ static void ext4_dx_csum_set(struct inode *inode, struct ext4_dir_entry *dirent)
count = le16_to_cpu(c->count);
if (count_offset + (limit * sizeof(struct dx_entry)) >
EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) {
- EXT4_ERROR_INODE(inode, "metadata_csum set but no space for "
- "tree checksum. Run e2fsck -D.");
+ warn_no_space_for_csum(inode);
return;
}
t = (struct dx_tail *)(((struct dx_entry *)c) + limit);
@@ -725,7 +722,7 @@ dx_probe(const struct qstr *d_name, struct inode *dir,
ext4_warning(dir->i_sb, "Node failed checksum");
brelse(bh);
*err = ERR_BAD_DX_DIR;
- goto fail;
+ goto fail2;
}
set_buffer_verified(bh);
@@ -890,6 +887,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
EXT4_DIR_REC_LEN(0));
for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) {
if (ext4_check_dir_entry(dir, NULL, de, bh,
+ bh->b_data, bh->b_size,
(block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
+ ((char *)de - bh->b_data))) {
/* On error, skip the f_pos to the next block. */
@@ -1007,6 +1005,15 @@ errout:
return (err);
}
+static inline int search_dirblock(struct buffer_head *bh,
+ struct inode *dir,
+ const struct qstr *d_name,
+ unsigned int offset,
+ struct ext4_dir_entry_2 **res_dir)
+{
+ return search_dir(bh, bh->b_data, dir->i_sb->s_blocksize, dir,
+ d_name, offset, res_dir);
+}
/*
* Directory block splitting, compacting
@@ -1081,13 +1088,6 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
dx_set_count(entries, count + 1);
}
-static void ext4_update_dx_flag(struct inode *inode)
-{
- if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_COMPAT_DIR_INDEX))
- ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
-}
-
/*
* NOTE! unlike strncmp, ext4_match returns 1 for success, 0 for failure.
*
@@ -1107,11 +1107,13 @@ static inline int ext4_match (int len, const char * const name,
/*
* Returns 0 if not found, -1 on failure, and 1 on success
*/
-static inline int search_dirblock(struct buffer_head *bh,
- struct inode *dir,
- const struct qstr *d_name,
- unsigned int offset,
- struct ext4_dir_entry_2 ** res_dir)
+int search_dir(struct buffer_head *bh,
+ char *search_buf,
+ int buf_size,
+ struct inode *dir,
+ const struct qstr *d_name,
+ unsigned int offset,
+ struct ext4_dir_entry_2 **res_dir)
{
struct ext4_dir_entry_2 * de;
char * dlimit;
@@ -1119,8 +1121,8 @@ static inline int search_dirblock(struct buffer_head *bh,
const char *name = d_name->name;
int namelen = d_name->len;
- de = (struct ext4_dir_entry_2 *) bh->b_data;
- dlimit = bh->b_data + dir->i_sb->s_blocksize;
+ de = (struct ext4_dir_entry_2 *)search_buf;
+ dlimit = search_buf + buf_size;
while ((char *) de < dlimit) {
/* this code is executed quadratically often */
/* do minimal checking `by hand' */
@@ -1128,7 +1130,8 @@ static inline int search_dirblock(struct buffer_head *bh,
if ((char *) de + namelen <= dlimit &&
ext4_match (namelen, name, de)) {
/* found a match - just to be sure, do a full check */
- if (ext4_check_dir_entry(dir, NULL, de, bh, offset))
+ if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data,
+ bh->b_size, offset))
return -1;
*res_dir = de;
return 1;
@@ -1144,6 +1147,21 @@ static inline int search_dirblock(struct buffer_head *bh,
return 0;
}
+static int is_dx_internal_node(struct inode *dir, ext4_lblk_t block,
+ struct ext4_dir_entry *de)
+{
+ struct super_block *sb = dir->i_sb;
+
+ if (!is_dx(dir))
+ return 0;
+ if (block == 0)
+ return 1;
+ if (de->inode == 0 &&
+ ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize) ==
+ sb->s_blocksize)
+ return 1;
+ return 0;
+}
/*
* ext4_find_entry()
@@ -1158,7 +1176,8 @@ static inline int search_dirblock(struct buffer_head *bh,
*/
static struct buffer_head * ext4_find_entry (struct inode *dir,
const struct qstr *d_name,
- struct ext4_dir_entry_2 ** res_dir)
+ struct ext4_dir_entry_2 **res_dir,
+ int *inlined)
{
struct super_block *sb;
struct buffer_head *bh_use[NAMEI_RA_SIZE];
@@ -1179,6 +1198,18 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
namelen = d_name->len;
if (namelen > EXT4_NAME_LEN)
return NULL;
+
+ if (ext4_has_inline_data(dir)) {
+ int has_inline_data = 1;
+ ret = ext4_find_inline_entry(dir, d_name, res_dir,
+ &has_inline_data);
+ if (has_inline_data) {
+ if (inlined)
+ *inlined = 1;
+ return ret;
+ }
+ }
+
if ((namelen <= 2) && (name[0] == '.') &&
(name[1] == '.' || name[1] == '\0')) {
/*
@@ -1244,6 +1275,8 @@ restart:
goto next;
}
if (!buffer_verified(bh) &&
+ !is_dx_internal_node(dir, block,
+ (struct ext4_dir_entry *)bh->b_data) &&
!ext4_dirent_csum_verify(dir,
(struct ext4_dir_entry *)bh->b_data)) {
EXT4_ERROR_INODE(dir, "checksumming directory "
@@ -1361,7 +1394,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
if (dentry->d_name.len > EXT4_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
- bh = ext4_find_entry(dir, &dentry->d_name, &de);
+ bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
inode = NULL;
if (bh) {
__u32 ino = le32_to_cpu(de->inode);
@@ -1395,7 +1428,7 @@ struct dentry *ext4_get_parent(struct dentry *child)
struct ext4_dir_entry_2 * de;
struct buffer_head *bh;
- bh = ext4_find_entry(child->d_inode, &dotdot, &de);
+ bh = ext4_find_entry(child->d_inode, &dotdot, &de, NULL);
if (!bh)
return ERR_PTR(-ENOENT);
ino = le32_to_cpu(de->inode);
@@ -1593,6 +1626,63 @@ errout:
return NULL;
}
+int ext4_find_dest_de(struct inode *dir, struct inode *inode,
+ struct buffer_head *bh,
+ void *buf, int buf_size,
+ const char *name, int namelen,
+ struct ext4_dir_entry_2 **dest_de)
+{
+ struct ext4_dir_entry_2 *de;
+ unsigned short reclen = EXT4_DIR_REC_LEN(namelen);
+ int nlen, rlen;
+ unsigned int offset = 0;
+ char *top;
+
+ de = (struct ext4_dir_entry_2 *)buf;
+ top = buf + buf_size - reclen;
+ while ((char *) de <= top) {
+ if (ext4_check_dir_entry(dir, NULL, de, bh,
+ buf, buf_size, offset))
+ return -EIO;
+ if (ext4_match(namelen, name, de))
+ return -EEXIST;
+ nlen = EXT4_DIR_REC_LEN(de->name_len);
+ rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+ if ((de->inode ? rlen - nlen : rlen) >= reclen)
+ break;
+ de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
+ offset += rlen;
+ }
+ if ((char *) de > top)
+ return -ENOSPC;
+
+ *dest_de = de;
+ return 0;
+}
+
+void ext4_insert_dentry(struct inode *inode,
+ struct ext4_dir_entry_2 *de,
+ int buf_size,
+ const char *name, int namelen)
+{
+
+ int nlen, rlen;
+
+ nlen = EXT4_DIR_REC_LEN(de->name_len);
+ rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+ if (de->inode) {
+ struct ext4_dir_entry_2 *de1 =
+ (struct ext4_dir_entry_2 *)((char *)de + nlen);
+ de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, buf_size);
+ de->rec_len = ext4_rec_len_to_disk(nlen, buf_size);
+ de = de1;
+ }
+ de->file_type = EXT4_FT_UNKNOWN;
+ de->inode = cpu_to_le32(inode->i_ino);
+ ext4_set_de_type(inode->i_sb, de, inode->i_mode);
+ de->name_len = namelen;
+ memcpy(de->name, name, namelen);
+}
/*
* Add a new entry into a directory (leaf) block. If de is non-NULL,
* it points to a directory entry which is guaranteed to be large
@@ -1608,12 +1698,10 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
struct inode *dir = dentry->d_parent->d_inode;
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
- unsigned int offset = 0;
unsigned int blocksize = dir->i_sb->s_blocksize;
unsigned short reclen;
- int nlen, rlen, err;
- char *top;
int csum_size = 0;
+ int err;
if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
@@ -1621,22 +1709,11 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
reclen = EXT4_DIR_REC_LEN(namelen);
if (!de) {
- de = (struct ext4_dir_entry_2 *)bh->b_data;
- top = bh->b_data + (blocksize - csum_size) - reclen;
- while ((char *) de <= top) {
- if (ext4_check_dir_entry(dir, NULL, de, bh, offset))
- return -EIO;
- if (ext4_match(namelen, name, de))
- return -EEXIST;
- nlen = EXT4_DIR_REC_LEN(de->name_len);
- rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
- if ((de->inode? rlen - nlen: rlen) >= reclen)
- break;
- de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
- offset += rlen;
- }
- if ((char *) de > top)
- return -ENOSPC;
+ err = ext4_find_dest_de(dir, inode,
+ bh, bh->b_data, blocksize - csum_size,
+ name, namelen, &de);
+ if (err)
+ return err;
}
BUFFER_TRACE(bh, "get_write_access");
err = ext4_journal_get_write_access(handle, bh);
@@ -1646,19 +1723,8 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
}
/* By now the buffer is marked for journaling */
- nlen = EXT4_DIR_REC_LEN(de->name_len);
- rlen = ext4_rec_len_from_disk(de->rec_len, blocksize);
- if (de->inode) {
- struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen);
- de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, blocksize);
- de->rec_len = ext4_rec_len_to_disk(nlen, blocksize);
- de = de1;
- }
- de->file_type = EXT4_FT_UNKNOWN;
- de->inode = cpu_to_le32(inode->i_ino);
- ext4_set_de_type(dir->i_sb, de, inode->i_mode);
- de->name_len = namelen;
- memcpy(de->name, name, namelen);
+ ext4_insert_dentry(inode, de, blocksize, name, namelen);
+
/*
* XXX shouldn't update any times until successful
* completion of syscall, but too many callers depend
@@ -1831,6 +1897,17 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
blocksize = sb->s_blocksize;
if (!dentry->d_name.len)
return -EINVAL;
+
+ if (ext4_has_inline_data(dir)) {
+ retval = ext4_try_add_inline_entry(handle, dentry, inode);
+ if (retval < 0)
+ return retval;
+ if (retval == 1) {
+ retval = 0;
+ return retval;
+ }
+ }
+
if (is_dx(dir)) {
retval = ext4_dx_add_entry(handle, dentry, inode);
if (!retval || (retval != ERR_BAD_DX_DIR))
@@ -2036,36 +2113,29 @@ cleanup:
}
/*
- * ext4_delete_entry deletes a directory entry by merging it with the
- * previous entry
+ * ext4_generic_delete_entry deletes a directory entry by merging it
+ * with the previous entry
*/
-static int ext4_delete_entry(handle_t *handle,
- struct inode *dir,
- struct ext4_dir_entry_2 *de_del,
- struct buffer_head *bh)
+int ext4_generic_delete_entry(handle_t *handle,
+ struct inode *dir,
+ struct ext4_dir_entry_2 *de_del,
+ struct buffer_head *bh,
+ void *entry_buf,
+ int buf_size,
+ int csum_size)
{
struct ext4_dir_entry_2 *de, *pde;
unsigned int blocksize = dir->i_sb->s_blocksize;
- int csum_size = 0;
- int i, err;
-
- if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
- csum_size = sizeof(struct ext4_dir_entry_tail);
+ int i;
i = 0;
pde = NULL;
- de = (struct ext4_dir_entry_2 *) bh->b_data;
- while (i < bh->b_size - csum_size) {
- if (ext4_check_dir_entry(dir, NULL, de, bh, i))
+ de = (struct ext4_dir_entry_2 *)entry_buf;
+ while (i < buf_size - csum_size) {
+ if (ext4_check_dir_entry(dir, NULL, de, bh,
+ bh->b_data, bh->b_size, i))
return -EIO;
if (de == de_del) {
- BUFFER_TRACE(bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, bh);
- if (unlikely(err)) {
- ext4_std_error(dir->i_sb, err);
- return err;
- }
if (pde)
pde->rec_len = ext4_rec_len_to_disk(
ext4_rec_len_from_disk(pde->rec_len,
@@ -2076,12 +2146,6 @@ static int ext4_delete_entry(handle_t *handle,
else
de->inode = 0;
dir->i_version++;
- BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
- err = ext4_handle_dirty_dirent_node(handle, dir, bh);
- if (unlikely(err)) {
- ext4_std_error(dir->i_sb, err);
- return err;
- }
return 0;
}
i += ext4_rec_len_from_disk(de->rec_len, blocksize);
@@ -2091,6 +2155,48 @@ static int ext4_delete_entry(handle_t *handle,
return -ENOENT;
}
+static int ext4_delete_entry(handle_t *handle,
+ struct inode *dir,
+ struct ext4_dir_entry_2 *de_del,
+ struct buffer_head *bh)
+{
+ int err, csum_size = 0;
+
+ if (ext4_has_inline_data(dir)) {
+ int has_inline_data = 1;
+ err = ext4_delete_inline_entry(handle, dir, de_del, bh,
+ &has_inline_data);
+ if (has_inline_data)
+ return err;
+ }
+
+ if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ csum_size = sizeof(struct ext4_dir_entry_tail);
+
+ BUFFER_TRACE(bh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, bh);
+ if (unlikely(err))
+ goto out;
+
+ err = ext4_generic_delete_entry(handle, dir, de_del,
+ bh, bh->b_data,
+ dir->i_sb->s_blocksize, csum_size);
+ if (err)
+ goto out;
+
+ BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
+ err = ext4_handle_dirty_dirent_node(handle, dir, bh);
+ if (unlikely(err))
+ goto out;
+
+ return 0;
+out:
+ if (err != -ENOENT)
+ ext4_std_error(dir->i_sb, err);
+ return err;
+}
+
/*
* DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
* since this indicates that nlinks count was previously 1.
@@ -2211,21 +2317,94 @@ retry:
return err;
}
-static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
+ struct ext4_dir_entry_2 *de,
+ int blocksize, int csum_size,
+ unsigned int parent_ino, int dotdot_real_len)
+{
+ de->inode = cpu_to_le32(inode->i_ino);
+ de->name_len = 1;
+ de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
+ blocksize);
+ strcpy(de->name, ".");
+ ext4_set_de_type(inode->i_sb, de, S_IFDIR);
+
+ de = ext4_next_entry(de, blocksize);
+ de->inode = cpu_to_le32(parent_ino);
+ de->name_len = 2;
+ if (!dotdot_real_len)
+ de->rec_len = ext4_rec_len_to_disk(blocksize -
+ (csum_size + EXT4_DIR_REC_LEN(1)),
+ blocksize);
+ else
+ de->rec_len = ext4_rec_len_to_disk(
+ EXT4_DIR_REC_LEN(de->name_len), blocksize);
+ strcpy(de->name, "..");
+ ext4_set_de_type(inode->i_sb, de, S_IFDIR);
+
+ return ext4_next_entry(de, blocksize);
+}
+
+static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
+ struct inode *inode)
{
- handle_t *handle;
- struct inode *inode;
struct buffer_head *dir_block = NULL;
struct ext4_dir_entry_2 *de;
struct ext4_dir_entry_tail *t;
unsigned int blocksize = dir->i_sb->s_blocksize;
int csum_size = 0;
- int err, retries = 0;
+ int err;
if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
csum_size = sizeof(struct ext4_dir_entry_tail);
+ if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
+ err = ext4_try_create_inline_dir(handle, dir, inode);
+ if (err < 0 && err != -ENOSPC)
+ goto out;
+ if (!err)
+ goto out;
+ }
+
+ inode->i_size = EXT4_I(inode)->i_disksize = blocksize;
+ if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) {
+ if (!err) {
+ err = -EIO;
+ ext4_error(inode->i_sb,
+ "Directory hole detected on inode %lu\n",
+ inode->i_ino);
+ }
+ goto out;
+ }
+ BUFFER_TRACE(dir_block, "get_write_access");
+ err = ext4_journal_get_write_access(handle, dir_block);
+ if (err)
+ goto out;
+ de = (struct ext4_dir_entry_2 *)dir_block->b_data;
+ ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0);
+ set_nlink(inode, 2);
+ if (csum_size) {
+ t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
+ initialize_dirent_tail(t, blocksize);
+ }
+
+ BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
+ err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+ if (err)
+ goto out;
+ set_buffer_verified(dir_block);
+out:
+ brelse(dir_block);
+ return err;
+}
+
+static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ handle_t *handle;
+ struct inode *inode;
+ int err, retries = 0;
+
if (EXT4_DIR_LINK_MAX(dir))
return -EMLINK;
@@ -2249,47 +2428,9 @@ retry:
inode->i_op = &ext4_dir_inode_operations;
inode->i_fop = &ext4_dir_operations;
- inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
- if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) {
- if (!err) {
- err = -EIO;
- ext4_error(inode->i_sb,
- "Directory hole detected on inode %lu\n",
- inode->i_ino);
- }
- goto out_clear_inode;
- }
- BUFFER_TRACE(dir_block, "get_write_access");
- err = ext4_journal_get_write_access(handle, dir_block);
- if (err)
- goto out_clear_inode;
- de = (struct ext4_dir_entry_2 *) dir_block->b_data;
- de->inode = cpu_to_le32(inode->i_ino);
- de->name_len = 1;
- de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len),
- blocksize);
- strcpy(de->name, ".");
- ext4_set_de_type(dir->i_sb, de, S_IFDIR);
- de = ext4_next_entry(de, blocksize);
- de->inode = cpu_to_le32(dir->i_ino);
- de->rec_len = ext4_rec_len_to_disk(blocksize -
- (csum_size + EXT4_DIR_REC_LEN(1)),
- blocksize);
- de->name_len = 2;
- strcpy(de->name, "..");
- ext4_set_de_type(dir->i_sb, de, S_IFDIR);
- set_nlink(inode, 2);
-
- if (csum_size) {
- t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
- initialize_dirent_tail(t, blocksize);
- }
-
- BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
- err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+ err = ext4_init_new_dir(handle, dir, inode);
if (err)
goto out_clear_inode;
- set_buffer_verified(dir_block);
err = ext4_mark_inode_dirty(handle, inode);
if (!err)
err = ext4_add_entry(handle, dentry, inode);
@@ -2309,7 +2450,6 @@ out_clear_inode:
unlock_new_inode(inode);
d_instantiate(dentry, inode);
out_stop:
- brelse(dir_block);
ext4_journal_stop(handle);
if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
@@ -2327,6 +2467,14 @@ static int empty_dir(struct inode *inode)
struct super_block *sb;
int err = 0;
+ if (ext4_has_inline_data(inode)) {
+ int has_inline_data = 1;
+
+ err = empty_inline_dir(inode, &has_inline_data);
+ if (has_inline_data)
+ return err;
+ }
+
sb = inode->i_sb;
if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
!(bh = ext4_bread(NULL, inode, 0, 0, &err))) {
@@ -2393,7 +2541,8 @@ static int empty_dir(struct inode *inode)
set_buffer_verified(bh);
de = (struct ext4_dir_entry_2 *) bh->b_data;
}
- if (ext4_check_dir_entry(inode, NULL, de, bh, offset)) {
+ if (ext4_check_dir_entry(inode, NULL, de, bh,
+ bh->b_data, bh->b_size, offset)) {
de = (struct ext4_dir_entry_2 *)(bh->b_data +
sb->s_blocksize);
offset = (offset | (sb->s_blocksize - 1)) + 1;
@@ -2498,7 +2647,8 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
struct ext4_iloc iloc;
int err = 0;
- if (!EXT4_SB(inode->i_sb)->s_journal)
+ if ((!EXT4_SB(inode->i_sb)->s_journal) &&
+ !(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS))
return 0;
mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock);
@@ -2579,7 +2729,7 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
return PTR_ERR(handle);
retval = -ENOENT;
- bh = ext4_find_entry(dir, &dentry->d_name, &de);
+ bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
if (!bh)
goto end_rmdir;
@@ -2644,7 +2794,7 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
ext4_handle_sync(handle);
retval = -ENOENT;
- bh = ext4_find_entry(dir, &dentry->d_name, &de);
+ bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
if (!bh)
goto end_unlink;
@@ -2826,8 +2976,39 @@ retry:
return err;
}
-#define PARENT_INO(buffer, size) \
- (ext4_next_entry((struct ext4_dir_entry_2 *)(buffer), size)->inode)
+
+/*
+ * Try to find buffer head where contains the parent block.
+ * It should be the inode block if it is inlined or the 1st block
+ * if it is a normal dir.
+ */
+static struct buffer_head *ext4_get_first_dir_block(handle_t *handle,
+ struct inode *inode,
+ int *retval,
+ struct ext4_dir_entry_2 **parent_de,
+ int *inlined)
+{
+ struct buffer_head *bh;
+
+ if (!ext4_has_inline_data(inode)) {
+ if (!(bh = ext4_bread(handle, inode, 0, 0, retval))) {
+ if (!*retval) {
+ *retval = -EIO;
+ ext4_error(inode->i_sb,
+ "Directory hole detected on inode %lu\n",
+ inode->i_ino);
+ }
+ return NULL;
+ }
+ *parent_de = ext4_next_entry(
+ (struct ext4_dir_entry_2 *)bh->b_data,
+ inode->i_sb->s_blocksize);
+ return bh;
+ }
+
+ *inlined = 1;
+ return ext4_get_first_inline_block(inode, parent_de, retval);
+}
/*
* Anybody can rename anything with this: the permission checks are left to the
@@ -2841,6 +3022,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
struct buffer_head *old_bh, *new_bh, *dir_bh;
struct ext4_dir_entry_2 *old_de, *new_de;
int retval, force_da_alloc = 0;
+ int inlined = 0, new_inlined = 0;
+ struct ext4_dir_entry_2 *parent_de;
dquot_initialize(old_dir);
dquot_initialize(new_dir);
@@ -2860,7 +3043,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
ext4_handle_sync(handle);
- old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de);
+ old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de, NULL);
/*
* Check for inode number is _not_ due to possible IO errors.
* We might rmdir the source, keep it as pwd of some process
@@ -2873,7 +3056,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
goto end_rename;
new_inode = new_dentry->d_inode;
- new_bh = ext4_find_entry(new_dir, &new_dentry->d_name, &new_de);
+ new_bh = ext4_find_entry(new_dir, &new_dentry->d_name,
+ &new_de, &new_inlined);
if (new_bh) {
if (!new_inode) {
brelse(new_bh);
@@ -2887,22 +3071,17 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
goto end_rename;
}
retval = -EIO;
- if (!(dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval))) {
- if (!retval) {
- retval = -EIO;
- ext4_error(old_inode->i_sb,
- "Directory hole detected on inode %lu\n",
- old_inode->i_ino);
- }
+ dir_bh = ext4_get_first_dir_block(handle, old_inode,
+ &retval, &parent_de,
+ &inlined);
+ if (!dir_bh)
goto end_rename;
- }
- if (!buffer_verified(dir_bh) &&
+ if (!inlined && !buffer_verified(dir_bh) &&
!ext4_dirent_csum_verify(old_inode,
(struct ext4_dir_entry *)dir_bh->b_data))
goto end_rename;
set_buffer_verified(dir_bh);
- if (le32_to_cpu(PARENT_INO(dir_bh->b_data,
- old_dir->i_sb->s_blocksize)) != old_dir->i_ino)
+ if (le32_to_cpu(parent_de->inode) != old_dir->i_ino)
goto end_rename;
retval = -EMLINK;
if (!new_inode && new_dir != old_dir &&
@@ -2931,10 +3110,13 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
ext4_current_time(new_dir);
ext4_mark_inode_dirty(handle, new_dir);
BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata");
- retval = ext4_handle_dirty_dirent_node(handle, new_dir, new_bh);
- if (unlikely(retval)) {
- ext4_std_error(new_dir->i_sb, retval);
- goto end_rename;
+ if (!new_inlined) {
+ retval = ext4_handle_dirty_dirent_node(handle,
+ new_dir, new_bh);
+ if (unlikely(retval)) {
+ ext4_std_error(new_dir->i_sb, retval);
+ goto end_rename;
+ }
}
brelse(new_bh);
new_bh = NULL;
@@ -2962,7 +3144,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
struct buffer_head *old_bh2;
struct ext4_dir_entry_2 *old_de2;
- old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de2);
+ old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name,
+ &old_de2, NULL);
if (old_bh2) {
retval = ext4_delete_entry(handle, old_dir,
old_de2, old_bh2);
@@ -2982,17 +3165,19 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
ext4_update_dx_flag(old_dir);
if (dir_bh) {
- PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) =
- cpu_to_le32(new_dir->i_ino);
+ parent_de->inode = cpu_to_le32(new_dir->i_ino);
BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata");
- if (is_dx(old_inode)) {
- retval = ext4_handle_dirty_dx_node(handle,
- old_inode,
- dir_bh);
+ if (!inlined) {
+ if (is_dx(old_inode)) {
+ retval = ext4_handle_dirty_dx_node(handle,
+ old_inode,
+ dir_bh);
+ } else {
+ retval = ext4_handle_dirty_dirent_node(handle,
+ old_inode, dir_bh);
+ }
} else {
- retval = ext4_handle_dirty_dirent_node(handle,
- old_inode,
- dir_bh);
+ retval = ext4_mark_inode_dirty(handle, old_inode);
}
if (retval) {
ext4_std_error(old_dir->i_sb, retval);
@@ -3043,23 +3228,19 @@ const struct inode_operations ext4_dir_inode_operations = {
.mknod = ext4_mknod,
.rename = ext4_rename,
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
-#endif
.get_acl = ext4_get_acl,
.fiemap = ext4_fiemap,
};
const struct inode_operations ext4_special_inode_operations = {
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
-#endif
.get_acl = ext4_get_acl,
};
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 68e896e12a67..0016fbca2a40 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -27,7 +27,6 @@
#include "ext4_jbd2.h"
#include "xattr.h"
#include "acl.h"
-#include "ext4_extents.h"
static struct kmem_cache *io_page_cachep, *io_end_cachep;
@@ -111,7 +110,7 @@ static int ext4_end_io(ext4_io_end_t *io)
inode_dio_done(inode);
/* Wake up anyone waiting on unwritten extent conversion */
if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
- wake_up_all(ext4_ioend_wq(io->inode));
+ wake_up_all(ext4_ioend_wq(inode));
return ret;
}
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 47bf06a2765d..d99387b89edd 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -783,7 +783,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
err = ext4_journal_get_write_access(handle, gdb_bh);
if (unlikely(err))
- goto exit_sbh;
+ goto exit_dind;
err = ext4_journal_get_write_access(handle, dind);
if (unlikely(err))
@@ -792,7 +792,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
/* ext4_reserve_inode_write() gets a reference on the iloc */
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (unlikely(err))
- goto exit_dindj;
+ goto exit_dind;
n_group_desc = ext4_kvmalloc((gdb_num + 1) *
sizeof(struct buffer_head *),
@@ -846,12 +846,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
exit_inode:
ext4_kvfree(n_group_desc);
- /* ext4_handle_release_buffer(handle, iloc.bh); */
brelse(iloc.bh);
-exit_dindj:
- /* ext4_handle_release_buffer(handle, dind); */
-exit_sbh:
- /* ext4_handle_release_buffer(handle, EXT4_SB(sb)->s_sbh); */
exit_dind:
brelse(dind);
exit_bh:
@@ -969,14 +964,8 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
}
for (i = 0; i < reserved_gdb; i++) {
- if ((err = ext4_journal_get_write_access(handle, primary[i]))) {
- /*
- int j;
- for (j = 0; j < i; j++)
- ext4_handle_release_buffer(handle, primary[j]);
- */
+ if ((err = ext4_journal_get_write_access(handle, primary[i])))
goto exit_bh;
- }
}
if ((err = ext4_reserve_inode_write(handle, inode, &iloc)))
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 80928f716850..3d4fb81bacd5 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -45,7 +45,7 @@
#include <linux/freezer.h>
#include "ext4.h"
-#include "ext4_extents.h"
+#include "ext4_extents.h" /* Needed for trace points definition */
#include "ext4_jbd2.h"
#include "xattr.h"
#include "acl.h"
@@ -939,10 +939,11 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
return NULL;
ei->vfs_inode.i_version = 1;
- ei->vfs_inode.i_data.writeback_index = 0;
memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
INIT_LIST_HEAD(&ei->i_prealloc_list);
spin_lock_init(&ei->i_prealloc_lock);
+ ext4_es_init_tree(&ei->i_es_tree);
+ rwlock_init(&ei->i_es_lock);
ei->i_reserved_data_blocks = 0;
ei->i_reserved_meta_blocks = 0;
ei->i_allocated_meta_blocks = 0;
@@ -996,9 +997,7 @@ static void init_once(void *foo)
struct ext4_inode_info *ei = (struct ext4_inode_info *) foo;
INIT_LIST_HEAD(&ei->i_orphan);
-#ifdef CONFIG_EXT4_FS_XATTR
init_rwsem(&ei->xattr_sem);
-#endif
init_rwsem(&ei->i_data_sem);
inode_init_once(&ei->vfs_inode);
}
@@ -1031,6 +1030,7 @@ void ext4_clear_inode(struct inode *inode)
clear_inode(inode);
dquot_drop(inode);
ext4_discard_preallocations(inode);
+ ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
if (EXT4_I(inode)->jinode) {
jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode),
EXT4_I(inode)->jinode);
@@ -1447,13 +1447,8 @@ static const struct mount_opts {
{Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ},
{Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ},
{Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ},
-#ifdef CONFIG_EXT4_FS_XATTR
{Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET},
{Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR},
-#else
- {Opt_user_xattr, 0, MOPT_NOSUPPORT},
- {Opt_nouser_xattr, 0, MOPT_NOSUPPORT},
-#endif
#ifdef CONFIG_EXT4_FS_POSIX_ACL
{Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET},
{Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR},
@@ -1650,9 +1645,7 @@ static int parse_options(char *options, struct super_block *sb,
unsigned int *journal_ioprio,
int is_remount)
{
-#ifdef CONFIG_QUOTA
struct ext4_sb_info *sbi = EXT4_SB(sb);
-#endif
char *p;
substring_t args[MAX_OPT_ARGS];
int token;
@@ -1701,6 +1694,16 @@ static int parse_options(char *options, struct super_block *sb,
}
}
#endif
+ if (test_opt(sb, DIOREAD_NOLOCK)) {
+ int blocksize =
+ BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
+
+ if (blocksize < PAGE_CACHE_SIZE) {
+ ext4_msg(sb, KERN_ERR, "can't mount with "
+ "dioread_nolock if block size != PAGE_SIZE");
+ return 0;
+ }
+ }
return 1;
}
@@ -2217,7 +2220,9 @@ static void ext4_orphan_cleanup(struct super_block *sb,
__func__, inode->i_ino, inode->i_size);
jbd_debug(2, "truncating inode %lu to %lld bytes\n",
inode->i_ino, inode->i_size);
+ mutex_lock(&inode->i_mutex);
ext4_truncate(inode);
+ mutex_unlock(&inode->i_mutex);
nr_truncates++;
} else {
ext4_msg(sb, KERN_DEBUG,
@@ -3202,7 +3207,6 @@ int ext4_calculate_overhead(struct super_block *sb)
ext4_fsblk_t overhead = 0;
char *buf = (char *) get_zeroed_page(GFP_KERNEL);
- memset(buf, 0, PAGE_SIZE);
if (!buf)
return -ENOMEM;
@@ -3229,6 +3233,10 @@ int ext4_calculate_overhead(struct super_block *sb)
memset(buf, 0, PAGE_SIZE);
cond_resched();
}
+ /* Add the journal blocks as well */
+ if (sbi->s_journal)
+ overhead += EXT4_B2C(sbi, sbi->s_journal->j_maxlen);
+
sbi->s_overhead = overhead;
smp_wmb();
free_page((unsigned long) buf);
@@ -3256,7 +3264,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
unsigned int i;
int needs_recovery, has_huge_files, has_bigalloc;
__u64 blocks_count;
- int err;
+ int err = 0;
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
ext4_group_t first_not_zeroed;
@@ -3272,9 +3280,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
sb->s_fs_info = sbi;
sbi->s_sb = sb;
- sbi->s_mount_opt = 0;
- sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID);
- sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID);
sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;
sbi->s_sb_block = sb_block;
if (sb->s_bdev->bd_part)
@@ -3285,6 +3290,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
for (cp = sb->s_id; (cp = strchr(cp, '/'));)
*cp = '!';
+ /* -EINVAL is default */
ret = -EINVAL;
blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE);
if (!blocksize) {
@@ -3369,9 +3375,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
if (def_mount_opts & EXT4_DEFM_UID16)
set_opt(sb, NO_UID32);
/* xattr user namespace & acls are now defaulted on */
-#ifdef CONFIG_EXT4_FS_XATTR
set_opt(sb, XATTR_USER);
-#endif
#ifdef CONFIG_EXT4_FS_POSIX_ACL
set_opt(sb, POSIX_ACL);
#endif
@@ -3446,15 +3450,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
clear_opt(sb, DELALLOC);
}
- blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
- if (test_opt(sb, DIOREAD_NOLOCK)) {
- if (blocksize < PAGE_SIZE) {
- ext4_msg(sb, KERN_ERR, "can't mount with "
- "dioread_nolock if block size != PAGE_SIZE");
- goto failed_mount;
- }
- }
-
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
(test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
@@ -3496,6 +3491,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY)))
goto failed_mount;
+ blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
if (blocksize < EXT4_MIN_BLOCK_SIZE ||
blocksize > EXT4_MAX_BLOCK_SIZE) {
ext4_msg(sb, KERN_ERR,
@@ -3662,7 +3658,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
" too large to mount safely on this system");
if (sizeof(sector_t) < 8)
ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled");
- ret = err;
goto failed_mount;
}
@@ -3770,7 +3765,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
if (err) {
ext4_msg(sb, KERN_ERR, "insufficient memory");
- ret = err;
goto failed_mount3;
}
@@ -3801,7 +3795,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
mutex_init(&sbi->s_orphan_lock);
- sbi->s_resize_flags = 0;
sb->s_root = NULL;
@@ -3897,8 +3890,8 @@ no_journal:
if (es->s_overhead_clusters)
sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters);
else {
- ret = ext4_calculate_overhead(sb);
- if (ret)
+ err = ext4_calculate_overhead(sb);
+ if (err)
goto failed_mount_wq;
}
@@ -3910,6 +3903,7 @@ no_journal:
alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
if (!EXT4_SB(sb)->dio_unwritten_wq) {
printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
+ ret = -ENOMEM;
goto failed_mount_wq;
}
@@ -4012,12 +4006,20 @@ no_journal:
/* Enable quota usage during mount. */
if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) &&
!(sb->s_flags & MS_RDONLY)) {
- ret = ext4_enable_quotas(sb);
- if (ret)
+ err = ext4_enable_quotas(sb);
+ if (err)
goto failed_mount7;
}
#endif /* CONFIG_QUOTA */
+ if (test_opt(sb, DISCARD)) {
+ struct request_queue *q = bdev_get_queue(sb->s_bdev);
+ if (!blk_queue_discard(q))
+ ext4_msg(sb, KERN_WARNING,
+ "mounting with \"discard\" option, but "
+ "the device does not support discard");
+ }
+
ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
"Opts: %s%s%s", descr, sbi->s_es->s_mount_opts,
*sbi->s_es->s_mount_opts ? "; " : "", orig_data);
@@ -4084,7 +4086,7 @@ out_fail:
kfree(sbi);
out_free_orig:
kfree(orig_data);
- return ret;
+ return err ? err : ret;
}
/*
@@ -4729,7 +4731,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
}
ext4_setup_system_zone(sb);
- if (sbi->s_journal == NULL)
+ if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY))
ext4_commit_super(sb, 1);
#ifdef CONFIG_QUOTA
@@ -4790,7 +4792,7 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_type = EXT4_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead);
+ buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead);
bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) -
percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter);
/* prevent underflow in case that few free space is available */
@@ -5282,6 +5284,7 @@ static int __init ext4_init_fs(void)
ext4_li_info = NULL;
mutex_init(&ext4_li_mtx);
+ /* Build-time check for flags consistency */
ext4_check_flag_values();
for (i = 0; i < EXT4_WQ_HASH_SZ; i++) {
@@ -5289,9 +5292,14 @@ static int __init ext4_init_fs(void)
init_waitqueue_head(&ext4__ioend_wq[i]);
}
- err = ext4_init_pageio();
+ err = ext4_init_es();
if (err)
return err;
+
+ err = ext4_init_pageio();
+ if (err)
+ goto out7;
+
err = ext4_init_system_zone();
if (err)
goto out6;
@@ -5341,6 +5349,9 @@ out5:
ext4_exit_system_zone();
out6:
ext4_exit_pageio();
+out7:
+ ext4_exit_es();
+
return err;
}
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index ed9354aff279..ff3711932018 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -35,22 +35,18 @@ const struct inode_operations ext4_symlink_inode_operations = {
.follow_link = page_follow_link_light,
.put_link = page_put_link,
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
-#endif
};
const struct inode_operations ext4_fast_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = ext4_follow_link,
.setattr = ext4_setattr,
-#ifdef CONFIG_EXT4_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
.removexattr = generic_removexattr,
-#endif
};
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 2cdb98d62980..3a91ebc2b66f 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -61,11 +61,6 @@
#include "xattr.h"
#include "acl.h"
-#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
-#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
-#define BFIRST(bh) ENTRY(BHDR(bh)+1)
-#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
-
#ifdef EXT4_XATTR_DEBUG
# define ea_idebug(inode, f...) do { \
printk(KERN_DEBUG "inode %s:%lu: ", \
@@ -312,7 +307,7 @@ cleanup:
return error;
}
-static int
+int
ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
void *buffer, size_t buffer_size)
{
@@ -581,21 +576,6 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
return (*min_offs - ((void *)last - base) - sizeof(__u32));
}
-struct ext4_xattr_info {
- int name_index;
- const char *name;
- const void *value;
- size_t value_len;
-};
-
-struct ext4_xattr_search {
- struct ext4_xattr_entry *first;
- void *base;
- void *end;
- struct ext4_xattr_entry *here;
- int not_found;
-};
-
static int
ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
{
@@ -648,9 +628,14 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
size. Just replace. */
s->here->e_value_size =
cpu_to_le32(i->value_len);
- memset(val + size - EXT4_XATTR_PAD, 0,
- EXT4_XATTR_PAD); /* Clear pad bytes. */
- memcpy(val, i->value, i->value_len);
+ if (i->value == EXT4_ZERO_XATTR_VALUE) {
+ memset(val, 0, size);
+ } else {
+ /* Clear pad bytes first. */
+ memset(val + size - EXT4_XATTR_PAD, 0,
+ EXT4_XATTR_PAD);
+ memcpy(val, i->value, i->value_len);
+ }
return 0;
}
@@ -689,9 +674,14 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
size_t size = EXT4_XATTR_SIZE(i->value_len);
void *val = s->base + min_offs - size;
s->here->e_value_offs = cpu_to_le16(min_offs - size);
- memset(val + size - EXT4_XATTR_PAD, 0,
- EXT4_XATTR_PAD); /* Clear the pad bytes. */
- memcpy(val, i->value, i->value_len);
+ if (i->value == EXT4_ZERO_XATTR_VALUE) {
+ memset(val, 0, size);
+ } else {
+ /* Clear the pad bytes first. */
+ memset(val + size - EXT4_XATTR_PAD, 0,
+ EXT4_XATTR_PAD);
+ memcpy(val, i->value, i->value_len);
+ }
}
}
return 0;
@@ -794,7 +784,6 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
int offset = (char *)s->here - bs->bh->b_data;
unlock_buffer(bs->bh);
- ext4_handle_release_buffer(handle, bs->bh);
if (ce) {
mb_cache_entry_release(ce);
ce = NULL;
@@ -950,14 +939,8 @@ bad_block:
#undef header
}
-struct ext4_xattr_ibody_find {
- struct ext4_xattr_search s;
- struct ext4_iloc iloc;
-};
-
-static int
-ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
- struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is)
{
struct ext4_xattr_ibody_header *header;
struct ext4_inode *raw_inode;
@@ -985,10 +968,47 @@ ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
return 0;
}
-static int
-ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
- struct ext4_xattr_info *i,
- struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
+ struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is)
+{
+ struct ext4_xattr_ibody_header *header;
+ struct ext4_xattr_search *s = &is->s;
+ int error;
+
+ if (EXT4_I(inode)->i_extra_isize == 0)
+ return -ENOSPC;
+ error = ext4_xattr_set_entry(i, s);
+ if (error) {
+ if (error == -ENOSPC &&
+ ext4_has_inline_data(inode)) {
+ error = ext4_try_to_evict_inline_data(handle, inode,
+ EXT4_XATTR_LEN(strlen(i->name) +
+ EXT4_XATTR_SIZE(i->value_len)));
+ if (error)
+ return error;
+ error = ext4_xattr_ibody_find(inode, i, is);
+ if (error)
+ return error;
+ error = ext4_xattr_set_entry(i, s);
+ }
+ if (error)
+ return error;
+ }
+ header = IHDR(inode, ext4_raw_inode(&is->iloc));
+ if (!IS_LAST_ENTRY(s->first)) {
+ header->h_magic = cpu_to_le32(EXT4_XATTR_MAGIC);
+ ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+ } else {
+ header->h_magic = cpu_to_le32(0);
+ ext4_clear_inode_state(inode, EXT4_STATE_XATTR);
+ }
+ return 0;
+}
+
+static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+ struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is)
{
struct ext4_xattr_ibody_header *header;
struct ext4_xattr_search *s = &is->s;
@@ -1144,9 +1164,17 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
{
handle_t *handle;
int error, retries = 0;
+ int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb);
retry:
- handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+ /*
+ * In case of inline data, we may push out the data to a block,
+ * So reserve the journal space first.
+ */
+ if (ext4_has_inline_data(inode))
+ credits += ext4_writepage_trans_blocks(inode) + 1;
+
+ handle = ext4_journal_start(inode, credits);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
} else {
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 91f31ca7d9af..69eda787a96a 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -21,6 +21,7 @@
#define EXT4_XATTR_INDEX_TRUSTED 4
#define EXT4_XATTR_INDEX_LUSTRE 5
#define EXT4_XATTR_INDEX_SECURITY 6
+#define EXT4_XATTR_INDEX_SYSTEM 7
struct ext4_xattr_header {
__le32 h_magic; /* magic number for identification */
@@ -65,7 +66,32 @@ struct ext4_xattr_entry {
EXT4_I(inode)->i_extra_isize))
#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
-# ifdef CONFIG_EXT4_FS_XATTR
+#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
+#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
+#define BFIRST(bh) ENTRY(BHDR(bh)+1)
+#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
+
+#define EXT4_ZERO_XATTR_VALUE ((void *)-1)
+
+struct ext4_xattr_info {
+ int name_index;
+ const char *name;
+ const void *value;
+ size_t value_len;
+};
+
+struct ext4_xattr_search {
+ struct ext4_xattr_entry *first;
+ void *base;
+ void *end;
+ struct ext4_xattr_entry *here;
+ int not_found;
+};
+
+struct ext4_xattr_ibody_find {
+ struct ext4_xattr_search s;
+ struct ext4_iloc iloc;
+};
extern const struct xattr_handler ext4_xattr_user_handler;
extern const struct xattr_handler ext4_xattr_trusted_handler;
@@ -90,60 +116,82 @@ extern void ext4_exit_xattr(void);
extern const struct xattr_handler *ext4_xattr_handlers[];
-# else /* CONFIG_EXT4_FS_XATTR */
-
-static inline int
-ext4_xattr_get(struct inode *inode, int name_index, const char *name,
- void *buffer, size_t size, int flags)
-{
- return -EOPNOTSUPP;
-}
-
-static inline int
-ext4_xattr_set(struct inode *inode, int name_index, const char *name,
- const void *value, size_t size, int flags)
-{
- return -EOPNOTSUPP;
-}
-
-static inline int
-ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
- const char *name, const void *value, size_t size, int flags)
-{
- return -EOPNOTSUPP;
-}
-
-static inline void
-ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
-{
-}
-
-static inline void
-ext4_xattr_put_super(struct super_block *sb)
-{
-}
-
-static __init inline int
-ext4_init_xattr(void)
-{
- return 0;
-}
-
-static inline void
-ext4_exit_xattr(void)
-{
-}
-
-static inline int
-ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
- struct ext4_inode *raw_inode, handle_t *handle)
-{
- return -EOPNOTSUPP;
-}
-
-#define ext4_xattr_handlers NULL
-
-# endif /* CONFIG_EXT4_FS_XATTR */
+extern int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is);
+extern int ext4_xattr_ibody_get(struct inode *inode, int name_index,
+ const char *name,
+ void *buffer, size_t buffer_size);
+extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
+ struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is);
+
+extern int ext4_has_inline_data(struct inode *inode);
+extern int ext4_get_inline_size(struct inode *inode);
+extern int ext4_get_max_inline_size(struct inode *inode);
+extern int ext4_find_inline_data_nolock(struct inode *inode);
+extern void ext4_write_inline_data(struct inode *inode,
+ struct ext4_iloc *iloc,
+ void *buffer, loff_t pos,
+ unsigned int len);
+extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode,
+ unsigned int len);
+extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
+ unsigned int len);
+extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
+
+extern int ext4_readpage_inline(struct inode *inode, struct page *page);
+extern int ext4_try_to_write_inline_data(struct address_space *mapping,
+ struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned flags,
+ struct page **pagep);
+extern int ext4_write_inline_data_end(struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned copied,
+ struct page *page);
+extern struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+ unsigned len,
+ struct page *page);
+extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
+ struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned flags,
+ struct page **pagep,
+ void **fsdata);
+extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos,
+ unsigned len, unsigned copied,
+ struct page *page);
+extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry,
+ struct inode *inode);
+extern int ext4_try_create_inline_dir(handle_t *handle,
+ struct inode *parent,
+ struct inode *inode);
+extern int ext4_read_inline_dir(struct file *filp,
+ void *dirent, filldir_t filldir,
+ int *has_inline_data);
+extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir,
+ int *has_inline_data);
+extern int ext4_delete_inline_entry(handle_t *handle,
+ struct inode *dir,
+ struct ext4_dir_entry_2 *de_del,
+ struct buffer_head *bh,
+ int *has_inline_data);
+extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
+extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode,
+ struct ext4_dir_entry_2 **parent_de,
+ int *retval);
+extern int ext4_inline_data_fiemap(struct inode *inode,
+ struct fiemap_extent_info *fieinfo,
+ int *has_inline);
+extern int ext4_try_to_evict_inline_data(handle_t *handle,
+ struct inode *inode,
+ int needed);
+extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline);
+
+extern int ext4_convert_inline_data(struct inode *inode);
#ifdef CONFIG_EXT4_FS_SECURITY
extern int ext4_init_security(handle_t *handle, struct inode *inode,
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
new file mode 100644
index 000000000000..fd27e7e6326e
--- /dev/null
+++ b/fs/f2fs/Kconfig
@@ -0,0 +1,53 @@
+config F2FS_FS
+ tristate "F2FS filesystem support (EXPERIMENTAL)"
+ depends on BLOCK
+ help
+ F2FS is based on Log-structured File System (LFS), which supports
+ versatile "flash-friendly" features. The design has been focused on
+ addressing the fundamental issues in LFS, which are snowball effect
+ of wandering tree and high cleaning overhead.
+
+ Since flash-based storages show different characteristics according to
+ the internal geometry or flash memory management schemes aka FTL, F2FS
+ and tools support various parameters not only for configuring on-disk
+ layout, but also for selecting allocation and cleaning algorithms.
+
+ If unsure, say N.
+
+config F2FS_STAT_FS
+ bool "F2FS Status Information"
+ depends on F2FS_FS && DEBUG_FS
+ default y
+ help
+ /sys/kernel/debug/f2fs/ contains information about all the partitions
+ mounted as f2fs. Each file shows the whole f2fs information.
+
+ /sys/kernel/debug/f2fs/status includes:
+ - major file system information managed by f2fs currently
+ - average SIT information about whole segments
+ - current memory footprint consumed by f2fs.
+
+config F2FS_FS_XATTR
+ bool "F2FS extended attributes"
+ depends on F2FS_FS
+ default y
+ help
+ Extended attributes are name:value pairs associated with inodes by
+ the kernel or by users (see the attr(5) manual page, or visit
+ <http://acl.bestbits.at/> for details).
+
+ If unsure, say N.
+
+config F2FS_FS_POSIX_ACL
+ bool "F2FS Access Control Lists"
+ depends on F2FS_FS_XATTR
+ select FS_POSIX_ACL
+ default y
+ help
+ Posix Access Control Lists (ACLs) support permissions for users and
+ gourps beyond the owner/group/world scheme.
+
+ To learn more about Access Control Lists, visit the POSIX ACLs for
+ Linux website <http://acl.bestbits.at/>.
+
+ If you don't know what Access Control Lists are, say N
diff --git a/fs/f2fs/Makefile b/fs/f2fs/Makefile
new file mode 100644
index 000000000000..27a0820340b9
--- /dev/null
+++ b/fs/f2fs/Makefile
@@ -0,0 +1,7 @@
+obj-$(CONFIG_F2FS_FS) += f2fs.o
+
+f2fs-y := dir.o file.o inode.o namei.o hash.o super.o
+f2fs-y += checkpoint.o gc.o data.o node.o segment.o recovery.o
+f2fs-$(CONFIG_F2FS_STAT_FS) += debug.o
+f2fs-$(CONFIG_F2FS_FS_XATTR) += xattr.o
+f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
new file mode 100644
index 000000000000..137af4255da6
--- /dev/null
+++ b/fs/f2fs/acl.c
@@ -0,0 +1,412 @@
+/*
+ * fs/f2fs/acl.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Portions of this code from linux/fs/ext2/acl.c
+ *
+ * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/f2fs_fs.h>
+#include "f2fs.h"
+#include "xattr.h"
+#include "acl.h"
+
+#define get_inode_mode(i) ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
+ (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
+
+static inline size_t f2fs_acl_size(int count)
+{
+ if (count <= 4) {
+ return sizeof(struct f2fs_acl_header) +
+ count * sizeof(struct f2fs_acl_entry_short);
+ } else {
+ return sizeof(struct f2fs_acl_header) +
+ 4 * sizeof(struct f2fs_acl_entry_short) +
+ (count - 4) * sizeof(struct f2fs_acl_entry);
+ }
+}
+
+static inline int f2fs_acl_count(size_t size)
+{
+ ssize_t s;
+ size -= sizeof(struct f2fs_acl_header);
+ s = size - 4 * sizeof(struct f2fs_acl_entry_short);
+ if (s < 0) {
+ if (size % sizeof(struct f2fs_acl_entry_short))
+ return -1;
+ return size / sizeof(struct f2fs_acl_entry_short);
+ } else {
+ if (s % sizeof(struct f2fs_acl_entry))
+ return -1;
+ return s / sizeof(struct f2fs_acl_entry) + 4;
+ }
+}
+
+static struct posix_acl *f2fs_acl_from_disk(const char *value, size_t size)
+{
+ int i, count;
+ struct posix_acl *acl;
+ struct f2fs_acl_header *hdr = (struct f2fs_acl_header *)value;
+ struct f2fs_acl_entry *entry = (struct f2fs_acl_entry *)(hdr + 1);
+ const char *end = value + size;
+
+ if (hdr->a_version != cpu_to_le32(F2FS_ACL_VERSION))
+ return ERR_PTR(-EINVAL);
+
+ count = f2fs_acl_count(size);
+ if (count < 0)
+ return ERR_PTR(-EINVAL);
+ if (count == 0)
+ return NULL;
+
+ acl = posix_acl_alloc(count, GFP_KERNEL);
+ if (!acl)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; i < count; i++) {
+
+ if ((char *)entry > end)
+ goto fail;
+
+ acl->a_entries[i].e_tag = le16_to_cpu(entry->e_tag);
+ acl->a_entries[i].e_perm = le16_to_cpu(entry->e_perm);
+
+ switch (acl->a_entries[i].e_tag) {
+ case ACL_USER_OBJ:
+ case ACL_GROUP_OBJ:
+ case ACL_MASK:
+ case ACL_OTHER:
+ entry = (struct f2fs_acl_entry *)((char *)entry +
+ sizeof(struct f2fs_acl_entry_short));
+ break;
+
+ case ACL_USER:
+ acl->a_entries[i].e_uid =
+ make_kuid(&init_user_ns,
+ le32_to_cpu(entry->e_id));
+ entry = (struct f2fs_acl_entry *)((char *)entry +
+ sizeof(struct f2fs_acl_entry));
+ break;
+ case ACL_GROUP:
+ acl->a_entries[i].e_gid =
+ make_kgid(&init_user_ns,
+ le32_to_cpu(entry->e_id));
+ entry = (struct f2fs_acl_entry *)((char *)entry +
+ sizeof(struct f2fs_acl_entry));
+ break;
+ default:
+ goto fail;
+ }
+ }
+ if ((char *)entry != end)
+ goto fail;
+ return acl;
+fail:
+ posix_acl_release(acl);
+ return ERR_PTR(-EINVAL);
+}
+
+static void *f2fs_acl_to_disk(const struct posix_acl *acl, size_t *size)
+{
+ struct f2fs_acl_header *f2fs_acl;
+ struct f2fs_acl_entry *entry;
+ int i;
+
+ f2fs_acl = kmalloc(sizeof(struct f2fs_acl_header) + acl->a_count *
+ sizeof(struct f2fs_acl_entry), GFP_KERNEL);
+ if (!f2fs_acl)
+ return ERR_PTR(-ENOMEM);
+
+ f2fs_acl->a_version = cpu_to_le32(F2FS_ACL_VERSION);
+ entry = (struct f2fs_acl_entry *)(f2fs_acl + 1);
+
+ for (i = 0; i < acl->a_count; i++) {
+
+ entry->e_tag = cpu_to_le16(acl->a_entries[i].e_tag);
+ entry->e_perm = cpu_to_le16(acl->a_entries[i].e_perm);
+
+ switch (acl->a_entries[i].e_tag) {
+ case ACL_USER:
+ entry->e_id = cpu_to_le32(
+ from_kuid(&init_user_ns,
+ acl->a_entries[i].e_uid));
+ entry = (struct f2fs_acl_entry *)((char *)entry +
+ sizeof(struct f2fs_acl_entry));
+ break;
+ case ACL_GROUP:
+ entry->e_id = cpu_to_le32(
+ from_kgid(&init_user_ns,
+ acl->a_entries[i].e_gid));
+ entry = (struct f2fs_acl_entry *)((char *)entry +
+ sizeof(struct f2fs_acl_entry));
+ break;
+ case ACL_USER_OBJ:
+ case ACL_GROUP_OBJ:
+ case ACL_MASK:
+ case ACL_OTHER:
+ entry = (struct f2fs_acl_entry *)((char *)entry +
+ sizeof(struct f2fs_acl_entry_short));
+ break;
+ default:
+ goto fail;
+ }
+ }
+ *size = f2fs_acl_size(acl->a_count);
+ return (void *)f2fs_acl;
+
+fail:
+ kfree(f2fs_acl);
+ return ERR_PTR(-EINVAL);
+}
+
+struct posix_acl *f2fs_get_acl(struct inode *inode, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
+ void *value = NULL;
+ struct posix_acl *acl;
+ int retval;
+
+ if (!test_opt(sbi, POSIX_ACL))
+ return NULL;
+
+ acl = get_cached_acl(inode, type);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
+ if (type == ACL_TYPE_ACCESS)
+ name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
+
+ retval = f2fs_getxattr(inode, name_index, "", NULL, 0);
+ if (retval > 0) {
+ value = kmalloc(retval, GFP_KERNEL);
+ if (!value)
+ return ERR_PTR(-ENOMEM);
+ retval = f2fs_getxattr(inode, name_index, "", value, retval);
+ }
+
+ if (retval > 0)
+ acl = f2fs_acl_from_disk(value, retval);
+ else if (retval == -ENODATA)
+ acl = NULL;
+ else
+ acl = ERR_PTR(retval);
+ kfree(value);
+
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
+
+ return acl;
+}
+
+static int f2fs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ int name_index;
+ void *value = NULL;
+ size_t size = 0;
+ int error;
+
+ if (!test_opt(sbi, POSIX_ACL))
+ return 0;
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS;
+ if (acl) {
+ error = posix_acl_equiv_mode(acl, &inode->i_mode);
+ if (error < 0)
+ return error;
+ set_acl_inode(fi, inode->i_mode);
+ if (error == 0)
+ acl = NULL;
+ }
+ break;
+
+ case ACL_TYPE_DEFAULT:
+ name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT;
+ if (!S_ISDIR(inode->i_mode))
+ return acl ? -EACCES : 0;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (acl) {
+ value = f2fs_acl_to_disk(acl, &size);
+ if (IS_ERR(value)) {
+ cond_clear_inode_flag(fi, FI_ACL_MODE);
+ return (int)PTR_ERR(value);
+ }
+ }
+
+ error = f2fs_setxattr(inode, name_index, "", value, size);
+
+ kfree(value);
+ if (!error)
+ set_cached_acl(inode, type, acl);
+
+ cond_clear_inode_flag(fi, FI_ACL_MODE);
+ return error;
+}
+
+int f2fs_init_acl(struct inode *inode, struct inode *dir)
+{
+ struct posix_acl *acl = NULL;
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+ int error = 0;
+
+ if (!S_ISLNK(inode->i_mode)) {
+ if (test_opt(sbi, POSIX_ACL)) {
+ acl = f2fs_get_acl(dir, ACL_TYPE_DEFAULT);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ }
+ if (!acl)
+ inode->i_mode &= ~current_umask();
+ }
+
+ if (test_opt(sbi, POSIX_ACL) && acl) {
+
+ if (S_ISDIR(inode->i_mode)) {
+ error = f2fs_set_acl(inode, ACL_TYPE_DEFAULT, acl);
+ if (error)
+ goto cleanup;
+ }
+ error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
+ if (error < 0)
+ return error;
+ if (error > 0)
+ error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl);
+ }
+cleanup:
+ posix_acl_release(acl);
+ return error;
+}
+
+int f2fs_acl_chmod(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct posix_acl *acl;
+ int error;
+ mode_t mode = get_inode_mode(inode);
+
+ if (!test_opt(sbi, POSIX_ACL))
+ return 0;
+ if (S_ISLNK(mode))
+ return -EOPNOTSUPP;
+
+ acl = f2fs_get_acl(inode, ACL_TYPE_ACCESS);
+ if (IS_ERR(acl) || !acl)
+ return PTR_ERR(acl);
+
+ error = posix_acl_chmod(&acl, GFP_KERNEL, mode);
+ if (error)
+ return error;
+ error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl);
+ posix_acl_release(acl);
+ return error;
+}
+
+static size_t f2fs_xattr_list_acl(struct dentry *dentry, char *list,
+ size_t list_size, const char *name, size_t name_len, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+ const char *xname = POSIX_ACL_XATTR_DEFAULT;
+ size_t size;
+
+ if (!test_opt(sbi, POSIX_ACL))
+ return 0;
+
+ if (type == ACL_TYPE_ACCESS)
+ xname = POSIX_ACL_XATTR_ACCESS;
+
+ size = strlen(xname) + 1;
+ if (list && size <= list_size)
+ memcpy(list, xname, size);
+ return size;
+}
+
+static int f2fs_xattr_get_acl(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+ struct posix_acl *acl;
+ int error;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (!test_opt(sbi, POSIX_ACL))
+ return -EOPNOTSUPP;
+
+ acl = f2fs_get_acl(dentry->d_inode, type);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (!acl)
+ return -ENODATA;
+ error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
+ posix_acl_release(acl);
+
+ return error;
+}
+
+static int f2fs_xattr_set_acl(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+ struct inode *inode = dentry->d_inode;
+ struct posix_acl *acl = NULL;
+ int error;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (!test_opt(sbi, POSIX_ACL))
+ return -EOPNOTSUPP;
+ if (!inode_owner_or_capable(inode))
+ return -EPERM;
+
+ if (value) {
+ acl = posix_acl_from_xattr(&init_user_ns, value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (acl) {
+ error = posix_acl_valid(acl);
+ if (error)
+ goto release_and_out;
+ }
+ } else {
+ acl = NULL;
+ }
+
+ error = f2fs_set_acl(inode, type, acl);
+
+release_and_out:
+ posix_acl_release(acl);
+ return error;
+}
+
+const struct xattr_handler f2fs_xattr_acl_default_handler = {
+ .prefix = POSIX_ACL_XATTR_DEFAULT,
+ .flags = ACL_TYPE_DEFAULT,
+ .list = f2fs_xattr_list_acl,
+ .get = f2fs_xattr_get_acl,
+ .set = f2fs_xattr_set_acl,
+};
+
+const struct xattr_handler f2fs_xattr_acl_access_handler = {
+ .prefix = POSIX_ACL_XATTR_ACCESS,
+ .flags = ACL_TYPE_ACCESS,
+ .list = f2fs_xattr_list_acl,
+ .get = f2fs_xattr_get_acl,
+ .set = f2fs_xattr_set_acl,
+};
diff --git a/fs/f2fs/acl.h b/fs/f2fs/acl.h
new file mode 100644
index 000000000000..80f430674417
--- /dev/null
+++ b/fs/f2fs/acl.h
@@ -0,0 +1,57 @@
+/*
+ * fs/f2fs/acl.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Portions of this code from linux/fs/ext2/acl.h
+ *
+ * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __F2FS_ACL_H__
+#define __F2FS_ACL_H__
+
+#include <linux/posix_acl_xattr.h>
+
+#define F2FS_ACL_VERSION 0x0001
+
+struct f2fs_acl_entry {
+ __le16 e_tag;
+ __le16 e_perm;
+ __le32 e_id;
+};
+
+struct f2fs_acl_entry_short {
+ __le16 e_tag;
+ __le16 e_perm;
+};
+
+struct f2fs_acl_header {
+ __le32 a_version;
+};
+
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+
+extern struct posix_acl *f2fs_get_acl(struct inode *inode, int type);
+extern int f2fs_acl_chmod(struct inode *inode);
+extern int f2fs_init_acl(struct inode *inode, struct inode *dir);
+#else
+#define f2fs_check_acl NULL
+#define f2fs_get_acl NULL
+#define f2fs_set_acl NULL
+
+static inline int f2fs_acl_chmod(struct inode *inode)
+{
+ return 0;
+}
+
+static inline int f2fs_init_acl(struct inode *inode, struct inode *dir)
+{
+ return 0;
+}
+#endif
+#endif /* __F2FS_ACL_H__ */
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
new file mode 100644
index 000000000000..ff3c8439af87
--- /dev/null
+++ b/fs/f2fs/checkpoint.c
@@ -0,0 +1,793 @@
+/*
+ * fs/f2fs/checkpoint.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/bio.h>
+#include <linux/mpage.h>
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+#include <linux/f2fs_fs.h>
+#include <linux/pagevec.h>
+#include <linux/swap.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+
+static struct kmem_cache *orphan_entry_slab;
+static struct kmem_cache *inode_entry_slab;
+
+/*
+ * We guarantee no failure on the returned page.
+ */
+struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct address_space *mapping = sbi->meta_inode->i_mapping;
+ struct page *page = NULL;
+repeat:
+ page = grab_cache_page(mapping, index);
+ if (!page) {
+ cond_resched();
+ goto repeat;
+ }
+
+ /* We wait writeback only inside grab_meta_page() */
+ wait_on_page_writeback(page);
+ SetPageUptodate(page);
+ return page;
+}
+
+/*
+ * We guarantee no failure on the returned page.
+ */
+struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct address_space *mapping = sbi->meta_inode->i_mapping;
+ struct page *page;
+repeat:
+ page = grab_cache_page(mapping, index);
+ if (!page) {
+ cond_resched();
+ goto repeat;
+ }
+ if (f2fs_readpage(sbi, page, index, READ_SYNC)) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+ mark_page_accessed(page);
+
+ /* We do not allow returning an errorneous page */
+ return page;
+}
+
+static int f2fs_write_meta_page(struct page *page,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ int err;
+
+ wait_on_page_writeback(page);
+
+ err = write_meta_page(sbi, page, wbc);
+ if (err) {
+ wbc->pages_skipped++;
+ set_page_dirty(page);
+ }
+
+ dec_page_count(sbi, F2FS_DIRTY_META);
+
+ /* In this case, we should not unlock this page */
+ if (err != AOP_WRITEPAGE_ACTIVATE)
+ unlock_page(page);
+ return err;
+}
+
+static int f2fs_write_meta_pages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
+ struct block_device *bdev = sbi->sb->s_bdev;
+ long written;
+
+ if (wbc->for_kupdate)
+ return 0;
+
+ if (get_pages(sbi, F2FS_DIRTY_META) == 0)
+ return 0;
+
+ /* if mounting is failed, skip writing node pages */
+ mutex_lock(&sbi->cp_mutex);
+ written = sync_meta_pages(sbi, META, bio_get_nr_vecs(bdev));
+ mutex_unlock(&sbi->cp_mutex);
+ wbc->nr_to_write -= written;
+ return 0;
+}
+
+long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
+ long nr_to_write)
+{
+ struct address_space *mapping = sbi->meta_inode->i_mapping;
+ pgoff_t index = 0, end = LONG_MAX;
+ struct pagevec pvec;
+ long nwritten = 0;
+ struct writeback_control wbc = {
+ .for_reclaim = 0,
+ };
+
+ pagevec_init(&pvec, 0);
+
+ while (index <= end) {
+ int i, nr_pages;
+ nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_DIRTY,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
+ if (nr_pages == 0)
+ break;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+ lock_page(page);
+ BUG_ON(page->mapping != mapping);
+ BUG_ON(!PageDirty(page));
+ clear_page_dirty_for_io(page);
+ f2fs_write_meta_page(page, &wbc);
+ if (nwritten++ >= nr_to_write)
+ break;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+
+ if (nwritten)
+ f2fs_submit_bio(sbi, type, nr_to_write == LONG_MAX);
+
+ return nwritten;
+}
+
+static int f2fs_set_meta_page_dirty(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+ struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
+
+ SetPageUptodate(page);
+ if (!PageDirty(page)) {
+ __set_page_dirty_nobuffers(page);
+ inc_page_count(sbi, F2FS_DIRTY_META);
+ F2FS_SET_SB_DIRT(sbi);
+ return 1;
+ }
+ return 0;
+}
+
+const struct address_space_operations f2fs_meta_aops = {
+ .writepage = f2fs_write_meta_page,
+ .writepages = f2fs_write_meta_pages,
+ .set_page_dirty = f2fs_set_meta_page_dirty,
+};
+
+int check_orphan_space(struct f2fs_sb_info *sbi)
+{
+ unsigned int max_orphans;
+ int err = 0;
+
+ /*
+ * considering 512 blocks in a segment 5 blocks are needed for cp
+ * and log segment summaries. Remaining blocks are used to keep
+ * orphan entries with the limitation one reserved segment
+ * for cp pack we can have max 1020*507 orphan entries
+ */
+ max_orphans = (sbi->blocks_per_seg - 5) * F2FS_ORPHANS_PER_BLOCK;
+ mutex_lock(&sbi->orphan_inode_mutex);
+ if (sbi->n_orphans >= max_orphans)
+ err = -ENOSPC;
+ mutex_unlock(&sbi->orphan_inode_mutex);
+ return err;
+}
+
+void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ struct list_head *head, *this;
+ struct orphan_inode_entry *new = NULL, *orphan = NULL;
+
+ mutex_lock(&sbi->orphan_inode_mutex);
+ head = &sbi->orphan_inode_list;
+ list_for_each(this, head) {
+ orphan = list_entry(this, struct orphan_inode_entry, list);
+ if (orphan->ino == ino)
+ goto out;
+ if (orphan->ino > ino)
+ break;
+ orphan = NULL;
+ }
+retry:
+ new = kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
+ if (!new) {
+ cond_resched();
+ goto retry;
+ }
+ new->ino = ino;
+
+ /* add new_oentry into list which is sorted by inode number */
+ if (orphan) {
+ struct orphan_inode_entry *prev;
+
+ /* get previous entry */
+ prev = list_entry(orphan->list.prev, typeof(*prev), list);
+ if (&prev->list != head)
+ /* insert new orphan inode entry */
+ list_add(&new->list, &prev->list);
+ else
+ list_add(&new->list, head);
+ } else {
+ list_add_tail(&new->list, head);
+ }
+ sbi->n_orphans++;
+out:
+ mutex_unlock(&sbi->orphan_inode_mutex);
+}
+
+void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ struct list_head *this, *next, *head;
+ struct orphan_inode_entry *orphan;
+
+ mutex_lock(&sbi->orphan_inode_mutex);
+ head = &sbi->orphan_inode_list;
+ list_for_each_safe(this, next, head) {
+ orphan = list_entry(this, struct orphan_inode_entry, list);
+ if (orphan->ino == ino) {
+ list_del(&orphan->list);
+ kmem_cache_free(orphan_entry_slab, orphan);
+ sbi->n_orphans--;
+ break;
+ }
+ }
+ mutex_unlock(&sbi->orphan_inode_mutex);
+}
+
+static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ struct inode *inode = f2fs_iget(sbi->sb, ino);
+ BUG_ON(IS_ERR(inode));
+ clear_nlink(inode);
+
+ /* truncate all the data during iput */
+ iput(inode);
+}
+
+int recover_orphan_inodes(struct f2fs_sb_info *sbi)
+{
+ block_t start_blk, orphan_blkaddr, i, j;
+
+ if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
+ return 0;
+
+ sbi->por_doing = 1;
+ start_blk = __start_cp_addr(sbi) + 1;
+ orphan_blkaddr = __start_sum_addr(sbi) - 1;
+
+ for (i = 0; i < orphan_blkaddr; i++) {
+ struct page *page = get_meta_page(sbi, start_blk + i);
+ struct f2fs_orphan_block *orphan_blk;
+
+ orphan_blk = (struct f2fs_orphan_block *)page_address(page);
+ for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
+ nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
+ recover_orphan_inode(sbi, ino);
+ }
+ f2fs_put_page(page, 1);
+ }
+ /* clear Orphan Flag */
+ clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
+ sbi->por_doing = 0;
+ return 0;
+}
+
+static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
+{
+ struct list_head *head, *this, *next;
+ struct f2fs_orphan_block *orphan_blk = NULL;
+ struct page *page = NULL;
+ unsigned int nentries = 0;
+ unsigned short index = 1;
+ unsigned short orphan_blocks;
+
+ orphan_blocks = (unsigned short)((sbi->n_orphans +
+ (F2FS_ORPHANS_PER_BLOCK - 1)) / F2FS_ORPHANS_PER_BLOCK);
+
+ mutex_lock(&sbi->orphan_inode_mutex);
+ head = &sbi->orphan_inode_list;
+
+ /* loop for each orphan inode entry and write them in Jornal block */
+ list_for_each_safe(this, next, head) {
+ struct orphan_inode_entry *orphan;
+
+ orphan = list_entry(this, struct orphan_inode_entry, list);
+
+ if (nentries == F2FS_ORPHANS_PER_BLOCK) {
+ /*
+ * an orphan block is full of 1020 entries,
+ * then we need to flush current orphan blocks
+ * and bring another one in memory
+ */
+ orphan_blk->blk_addr = cpu_to_le16(index);
+ orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
+ orphan_blk->entry_count = cpu_to_le32(nentries);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+ index++;
+ start_blk++;
+ nentries = 0;
+ page = NULL;
+ }
+ if (page)
+ goto page_exist;
+
+ page = grab_meta_page(sbi, start_blk);
+ orphan_blk = (struct f2fs_orphan_block *)page_address(page);
+ memset(orphan_blk, 0, sizeof(*orphan_blk));
+page_exist:
+ orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
+ }
+ if (!page)
+ goto end;
+
+ orphan_blk->blk_addr = cpu_to_le16(index);
+ orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
+ orphan_blk->entry_count = cpu_to_le32(nentries);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+end:
+ mutex_unlock(&sbi->orphan_inode_mutex);
+}
+
+static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
+ block_t cp_addr, unsigned long long *version)
+{
+ struct page *cp_page_1, *cp_page_2 = NULL;
+ unsigned long blk_size = sbi->blocksize;
+ struct f2fs_checkpoint *cp_block;
+ unsigned long long cur_version = 0, pre_version = 0;
+ unsigned int crc = 0;
+ size_t crc_offset;
+
+ /* Read the 1st cp block in this CP pack */
+ cp_page_1 = get_meta_page(sbi, cp_addr);
+
+ /* get the version number */
+ cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
+ crc_offset = le32_to_cpu(cp_block->checksum_offset);
+ if (crc_offset >= blk_size)
+ goto invalid_cp1;
+
+ crc = *(unsigned int *)((unsigned char *)cp_block + crc_offset);
+ if (!f2fs_crc_valid(crc, cp_block, crc_offset))
+ goto invalid_cp1;
+
+ pre_version = le64_to_cpu(cp_block->checkpoint_ver);
+
+ /* Read the 2nd cp block in this CP pack */
+ cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
+ cp_page_2 = get_meta_page(sbi, cp_addr);
+
+ cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
+ crc_offset = le32_to_cpu(cp_block->checksum_offset);
+ if (crc_offset >= blk_size)
+ goto invalid_cp2;
+
+ crc = *(unsigned int *)((unsigned char *)cp_block + crc_offset);
+ if (!f2fs_crc_valid(crc, cp_block, crc_offset))
+ goto invalid_cp2;
+
+ cur_version = le64_to_cpu(cp_block->checkpoint_ver);
+
+ if (cur_version == pre_version) {
+ *version = cur_version;
+ f2fs_put_page(cp_page_2, 1);
+ return cp_page_1;
+ }
+invalid_cp2:
+ f2fs_put_page(cp_page_2, 1);
+invalid_cp1:
+ f2fs_put_page(cp_page_1, 1);
+ return NULL;
+}
+
+int get_valid_checkpoint(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_checkpoint *cp_block;
+ struct f2fs_super_block *fsb = sbi->raw_super;
+ struct page *cp1, *cp2, *cur_page;
+ unsigned long blk_size = sbi->blocksize;
+ unsigned long long cp1_version = 0, cp2_version = 0;
+ unsigned long long cp_start_blk_no;
+
+ sbi->ckpt = kzalloc(blk_size, GFP_KERNEL);
+ if (!sbi->ckpt)
+ return -ENOMEM;
+ /*
+ * Finding out valid cp block involves read both
+ * sets( cp pack1 and cp pack 2)
+ */
+ cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
+ cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
+
+ /* The second checkpoint pack should start at the next segment */
+ cp_start_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
+ cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
+
+ if (cp1 && cp2) {
+ if (ver_after(cp2_version, cp1_version))
+ cur_page = cp2;
+ else
+ cur_page = cp1;
+ } else if (cp1) {
+ cur_page = cp1;
+ } else if (cp2) {
+ cur_page = cp2;
+ } else {
+ goto fail_no_cp;
+ }
+
+ cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
+ memcpy(sbi->ckpt, cp_block, blk_size);
+
+ f2fs_put_page(cp1, 1);
+ f2fs_put_page(cp2, 1);
+ return 0;
+
+fail_no_cp:
+ kfree(sbi->ckpt);
+ return -EINVAL;
+}
+
+void set_dirty_dir_page(struct inode *inode, struct page *page)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct list_head *head = &sbi->dir_inode_list;
+ struct dir_inode_entry *new;
+ struct list_head *this;
+
+ if (!S_ISDIR(inode->i_mode))
+ return;
+retry:
+ new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
+ if (!new) {
+ cond_resched();
+ goto retry;
+ }
+ new->inode = inode;
+ INIT_LIST_HEAD(&new->list);
+
+ spin_lock(&sbi->dir_inode_lock);
+ list_for_each(this, head) {
+ struct dir_inode_entry *entry;
+ entry = list_entry(this, struct dir_inode_entry, list);
+ if (entry->inode == inode) {
+ kmem_cache_free(inode_entry_slab, new);
+ goto out;
+ }
+ }
+ list_add_tail(&new->list, head);
+ sbi->n_dirty_dirs++;
+
+ BUG_ON(!S_ISDIR(inode->i_mode));
+out:
+ inc_page_count(sbi, F2FS_DIRTY_DENTS);
+ inode_inc_dirty_dents(inode);
+ SetPagePrivate(page);
+
+ spin_unlock(&sbi->dir_inode_lock);
+}
+
+void remove_dirty_dir_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct list_head *head = &sbi->dir_inode_list;
+ struct list_head *this;
+
+ if (!S_ISDIR(inode->i_mode))
+ return;
+
+ spin_lock(&sbi->dir_inode_lock);
+ if (atomic_read(&F2FS_I(inode)->dirty_dents))
+ goto out;
+
+ list_for_each(this, head) {
+ struct dir_inode_entry *entry;
+ entry = list_entry(this, struct dir_inode_entry, list);
+ if (entry->inode == inode) {
+ list_del(&entry->list);
+ kmem_cache_free(inode_entry_slab, entry);
+ sbi->n_dirty_dirs--;
+ break;
+ }
+ }
+out:
+ spin_unlock(&sbi->dir_inode_lock);
+}
+
+void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
+{
+ struct list_head *head = &sbi->dir_inode_list;
+ struct dir_inode_entry *entry;
+ struct inode *inode;
+retry:
+ spin_lock(&sbi->dir_inode_lock);
+ if (list_empty(head)) {
+ spin_unlock(&sbi->dir_inode_lock);
+ return;
+ }
+ entry = list_entry(head->next, struct dir_inode_entry, list);
+ inode = igrab(entry->inode);
+ spin_unlock(&sbi->dir_inode_lock);
+ if (inode) {
+ filemap_flush(inode->i_mapping);
+ iput(inode);
+ } else {
+ /*
+ * We should submit bio, since it exists several
+ * wribacking dentry pages in the freeing inode.
+ */
+ f2fs_submit_bio(sbi, DATA, true);
+ }
+ goto retry;
+}
+
+/*
+ * Freeze all the FS-operations for checkpoint.
+ */
+void block_operations(struct f2fs_sb_info *sbi)
+{
+ int t;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .for_reclaim = 0,
+ };
+
+ /* Stop renaming operation */
+ mutex_lock_op(sbi, RENAME);
+ mutex_lock_op(sbi, DENTRY_OPS);
+
+retry_dents:
+ /* write all the dirty dentry pages */
+ sync_dirty_dir_inodes(sbi);
+
+ mutex_lock_op(sbi, DATA_WRITE);
+ if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
+ mutex_unlock_op(sbi, DATA_WRITE);
+ goto retry_dents;
+ }
+
+ /* block all the operations */
+ for (t = DATA_NEW; t <= NODE_TRUNC; t++)
+ mutex_lock_op(sbi, t);
+
+ mutex_lock(&sbi->write_inode);
+
+ /*
+ * POR: we should ensure that there is no dirty node pages
+ * until finishing nat/sit flush.
+ */
+retry:
+ sync_node_pages(sbi, 0, &wbc);
+
+ mutex_lock_op(sbi, NODE_WRITE);
+
+ if (get_pages(sbi, F2FS_DIRTY_NODES)) {
+ mutex_unlock_op(sbi, NODE_WRITE);
+ goto retry;
+ }
+ mutex_unlock(&sbi->write_inode);
+}
+
+static void unblock_operations(struct f2fs_sb_info *sbi)
+{
+ int t;
+ for (t = NODE_WRITE; t >= RENAME; t--)
+ mutex_unlock_op(sbi, t);
+}
+
+static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ nid_t last_nid = 0;
+ block_t start_blk;
+ struct page *cp_page;
+ unsigned int data_sum_blocks, orphan_blocks;
+ unsigned int crc32 = 0;
+ void *kaddr;
+ int i;
+
+ /* Flush all the NAT/SIT pages */
+ while (get_pages(sbi, F2FS_DIRTY_META))
+ sync_meta_pages(sbi, META, LONG_MAX);
+
+ next_free_nid(sbi, &last_nid);
+
+ /*
+ * modify checkpoint
+ * version number is already updated
+ */
+ ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
+ ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
+ ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
+ for (i = 0; i < 3; i++) {
+ ckpt->cur_node_segno[i] =
+ cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
+ ckpt->cur_node_blkoff[i] =
+ cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
+ ckpt->alloc_type[i + CURSEG_HOT_NODE] =
+ curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
+ }
+ for (i = 0; i < 3; i++) {
+ ckpt->cur_data_segno[i] =
+ cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
+ ckpt->cur_data_blkoff[i] =
+ cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
+ ckpt->alloc_type[i + CURSEG_HOT_DATA] =
+ curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
+ }
+
+ ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
+ ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
+ ckpt->next_free_nid = cpu_to_le32(last_nid);
+
+ /* 2 cp + n data seg summary + orphan inode blocks */
+ data_sum_blocks = npages_for_summary_flush(sbi);
+ if (data_sum_blocks < 3)
+ set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
+ else
+ clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
+
+ orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1)
+ / F2FS_ORPHANS_PER_BLOCK;
+ ckpt->cp_pack_start_sum = cpu_to_le32(1 + orphan_blocks);
+
+ if (is_umount) {
+ set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
+ ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
+ data_sum_blocks + orphan_blocks + NR_CURSEG_NODE_TYPE);
+ } else {
+ clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
+ ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
+ data_sum_blocks + orphan_blocks);
+ }
+
+ if (sbi->n_orphans)
+ set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
+ else
+ clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
+
+ /* update SIT/NAT bitmap */
+ get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
+ get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
+
+ crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
+ *(__le32 *)((unsigned char *)ckpt +
+ le32_to_cpu(ckpt->checksum_offset))
+ = cpu_to_le32(crc32);
+
+ start_blk = __start_cp_addr(sbi);
+
+ /* write out checkpoint buffer at block 0 */
+ cp_page = grab_meta_page(sbi, start_blk++);
+ kaddr = page_address(cp_page);
+ memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
+ set_page_dirty(cp_page);
+ f2fs_put_page(cp_page, 1);
+
+ if (sbi->n_orphans) {
+ write_orphan_inodes(sbi, start_blk);
+ start_blk += orphan_blocks;
+ }
+
+ write_data_summaries(sbi, start_blk);
+ start_blk += data_sum_blocks;
+ if (is_umount) {
+ write_node_summaries(sbi, start_blk);
+ start_blk += NR_CURSEG_NODE_TYPE;
+ }
+
+ /* writeout checkpoint block */
+ cp_page = grab_meta_page(sbi, start_blk);
+ kaddr = page_address(cp_page);
+ memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
+ set_page_dirty(cp_page);
+ f2fs_put_page(cp_page, 1);
+
+ /* wait for previous submitted node/meta pages writeback */
+ while (get_pages(sbi, F2FS_WRITEBACK))
+ congestion_wait(BLK_RW_ASYNC, HZ / 50);
+
+ filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX);
+ filemap_fdatawait_range(sbi->meta_inode->i_mapping, 0, LONG_MAX);
+
+ /* update user_block_counts */
+ sbi->last_valid_block_count = sbi->total_valid_block_count;
+ sbi->alloc_valid_block_count = 0;
+
+ /* Here, we only have one bio having CP pack */
+ if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))
+ sbi->sb->s_flags |= MS_RDONLY;
+ else
+ sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
+
+ clear_prefree_segments(sbi);
+ F2FS_RESET_SB_DIRT(sbi);
+}
+
+/*
+ * We guarantee that this checkpoint procedure should not fail.
+ */
+void write_checkpoint(struct f2fs_sb_info *sbi, bool blocked, bool is_umount)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ unsigned long long ckpt_ver;
+
+ if (!blocked) {
+ mutex_lock(&sbi->cp_mutex);
+ block_operations(sbi);
+ }
+
+ f2fs_submit_bio(sbi, DATA, true);
+ f2fs_submit_bio(sbi, NODE, true);
+ f2fs_submit_bio(sbi, META, true);
+
+ /*
+ * update checkpoint pack index
+ * Increase the version number so that
+ * SIT entries and seg summaries are written at correct place
+ */
+ ckpt_ver = le64_to_cpu(ckpt->checkpoint_ver);
+ ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
+
+ /* write cached NAT/SIT entries to NAT/SIT area */
+ flush_nat_entries(sbi);
+ flush_sit_entries(sbi);
+
+ reset_victim_segmap(sbi);
+
+ /* unlock all the fs_lock[] in do_checkpoint() */
+ do_checkpoint(sbi, is_umount);
+
+ unblock_operations(sbi);
+ mutex_unlock(&sbi->cp_mutex);
+}
+
+void init_orphan_info(struct f2fs_sb_info *sbi)
+{
+ mutex_init(&sbi->orphan_inode_mutex);
+ INIT_LIST_HEAD(&sbi->orphan_inode_list);
+ sbi->n_orphans = 0;
+}
+
+int __init create_checkpoint_caches(void)
+{
+ orphan_entry_slab = f2fs_kmem_cache_create("f2fs_orphan_entry",
+ sizeof(struct orphan_inode_entry), NULL);
+ if (unlikely(!orphan_entry_slab))
+ return -ENOMEM;
+ inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
+ sizeof(struct dir_inode_entry), NULL);
+ if (unlikely(!inode_entry_slab)) {
+ kmem_cache_destroy(orphan_entry_slab);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void destroy_checkpoint_caches(void)
+{
+ kmem_cache_destroy(orphan_entry_slab);
+ kmem_cache_destroy(inode_entry_slab);
+}
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
new file mode 100644
index 000000000000..7bd22a201125
--- /dev/null
+++ b/fs/f2fs/data.c
@@ -0,0 +1,718 @@
+/*
+ * fs/f2fs/data.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/mpage.h>
+#include <linux/writeback.h>
+#include <linux/backing-dev.h>
+#include <linux/blkdev.h>
+#include <linux/bio.h>
+#include <linux/prefetch.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+
+/*
+ * Lock ordering for the change of data block address:
+ * ->data_page
+ * ->node_page
+ * update block addresses in the node page
+ */
+static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr)
+{
+ struct f2fs_node *rn;
+ __le32 *addr_array;
+ struct page *node_page = dn->node_page;
+ unsigned int ofs_in_node = dn->ofs_in_node;
+
+ wait_on_page_writeback(node_page);
+
+ rn = (struct f2fs_node *)page_address(node_page);
+
+ /* Get physical address of data block */
+ addr_array = blkaddr_in_node(rn);
+ addr_array[ofs_in_node] = cpu_to_le32(new_addr);
+ set_page_dirty(node_page);
+}
+
+int reserve_new_block(struct dnode_of_data *dn)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+
+ if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))
+ return -EPERM;
+ if (!inc_valid_block_count(sbi, dn->inode, 1))
+ return -ENOSPC;
+
+ __set_data_blkaddr(dn, NEW_ADDR);
+ dn->data_blkaddr = NEW_ADDR;
+ sync_inode_page(dn);
+ return 0;
+}
+
+static int check_extent_cache(struct inode *inode, pgoff_t pgofs,
+ struct buffer_head *bh_result)
+{
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ pgoff_t start_fofs, end_fofs;
+ block_t start_blkaddr;
+
+ read_lock(&fi->ext.ext_lock);
+ if (fi->ext.len == 0) {
+ read_unlock(&fi->ext.ext_lock);
+ return 0;
+ }
+
+ sbi->total_hit_ext++;
+ start_fofs = fi->ext.fofs;
+ end_fofs = fi->ext.fofs + fi->ext.len - 1;
+ start_blkaddr = fi->ext.blk_addr;
+
+ if (pgofs >= start_fofs && pgofs <= end_fofs) {
+ unsigned int blkbits = inode->i_sb->s_blocksize_bits;
+ size_t count;
+
+ clear_buffer_new(bh_result);
+ map_bh(bh_result, inode->i_sb,
+ start_blkaddr + pgofs - start_fofs);
+ count = end_fofs - pgofs + 1;
+ if (count < (UINT_MAX >> blkbits))
+ bh_result->b_size = (count << blkbits);
+ else
+ bh_result->b_size = UINT_MAX;
+
+ sbi->read_hit_ext++;
+ read_unlock(&fi->ext.ext_lock);
+ return 1;
+ }
+ read_unlock(&fi->ext.ext_lock);
+ return 0;
+}
+
+void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn)
+{
+ struct f2fs_inode_info *fi = F2FS_I(dn->inode);
+ pgoff_t fofs, start_fofs, end_fofs;
+ block_t start_blkaddr, end_blkaddr;
+
+ BUG_ON(blk_addr == NEW_ADDR);
+ fofs = start_bidx_of_node(ofs_of_node(dn->node_page)) + dn->ofs_in_node;
+
+ /* Update the page address in the parent node */
+ __set_data_blkaddr(dn, blk_addr);
+
+ write_lock(&fi->ext.ext_lock);
+
+ start_fofs = fi->ext.fofs;
+ end_fofs = fi->ext.fofs + fi->ext.len - 1;
+ start_blkaddr = fi->ext.blk_addr;
+ end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1;
+
+ /* Drop and initialize the matched extent */
+ if (fi->ext.len == 1 && fofs == start_fofs)
+ fi->ext.len = 0;
+
+ /* Initial extent */
+ if (fi->ext.len == 0) {
+ if (blk_addr != NULL_ADDR) {
+ fi->ext.fofs = fofs;
+ fi->ext.blk_addr = blk_addr;
+ fi->ext.len = 1;
+ }
+ goto end_update;
+ }
+
+ /* Frone merge */
+ if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) {
+ fi->ext.fofs--;
+ fi->ext.blk_addr--;
+ fi->ext.len++;
+ goto end_update;
+ }
+
+ /* Back merge */
+ if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) {
+ fi->ext.len++;
+ goto end_update;
+ }
+
+ /* Split the existing extent */
+ if (fi->ext.len > 1 &&
+ fofs >= start_fofs && fofs <= end_fofs) {
+ if ((end_fofs - fofs) < (fi->ext.len >> 1)) {
+ fi->ext.len = fofs - start_fofs;
+ } else {
+ fi->ext.fofs = fofs + 1;
+ fi->ext.blk_addr = start_blkaddr +
+ fofs - start_fofs + 1;
+ fi->ext.len -= fofs - start_fofs + 1;
+ }
+ goto end_update;
+ }
+ write_unlock(&fi->ext.ext_lock);
+ return;
+
+end_update:
+ write_unlock(&fi->ext.ext_lock);
+ sync_inode_page(dn);
+ return;
+}
+
+struct page *find_data_page(struct inode *inode, pgoff_t index)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct address_space *mapping = inode->i_mapping;
+ struct dnode_of_data dn;
+ struct page *page;
+ int err;
+
+ page = find_get_page(mapping, index);
+ if (page && PageUptodate(page))
+ return page;
+ f2fs_put_page(page, 0);
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, index, RDONLY_NODE);
+ if (err)
+ return ERR_PTR(err);
+ f2fs_put_dnode(&dn);
+
+ if (dn.data_blkaddr == NULL_ADDR)
+ return ERR_PTR(-ENOENT);
+
+ /* By fallocate(), there is no cached page, but with NEW_ADDR */
+ if (dn.data_blkaddr == NEW_ADDR)
+ return ERR_PTR(-EINVAL);
+
+ page = grab_cache_page(mapping, index);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+ unlock_page(page);
+ return page;
+}
+
+/*
+ * If it tries to access a hole, return an error.
+ * Because, the callers, functions in dir.c and GC, should be able to know
+ * whether this page exists or not.
+ */
+struct page *get_lock_data_page(struct inode *inode, pgoff_t index)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct address_space *mapping = inode->i_mapping;
+ struct dnode_of_data dn;
+ struct page *page;
+ int err;
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, index, RDONLY_NODE);
+ if (err)
+ return ERR_PTR(err);
+ f2fs_put_dnode(&dn);
+
+ if (dn.data_blkaddr == NULL_ADDR)
+ return ERR_PTR(-ENOENT);
+
+ page = grab_cache_page(mapping, index);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ if (PageUptodate(page))
+ return page;
+
+ BUG_ON(dn.data_blkaddr == NEW_ADDR);
+ BUG_ON(dn.data_blkaddr == NULL_ADDR);
+
+ err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+ return page;
+}
+
+/*
+ * Caller ensures that this data page is never allocated.
+ * A new zero-filled data page is allocated in the page cache.
+ */
+struct page *get_new_data_page(struct inode *inode, pgoff_t index,
+ bool new_i_size)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct address_space *mapping = inode->i_mapping;
+ struct page *page;
+ struct dnode_of_data dn;
+ int err;
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, index, 0);
+ if (err)
+ return ERR_PTR(err);
+
+ if (dn.data_blkaddr == NULL_ADDR) {
+ if (reserve_new_block(&dn)) {
+ f2fs_put_dnode(&dn);
+ return ERR_PTR(-ENOSPC);
+ }
+ }
+ f2fs_put_dnode(&dn);
+
+ page = grab_cache_page(mapping, index);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ if (PageUptodate(page))
+ return page;
+
+ if (dn.data_blkaddr == NEW_ADDR) {
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ } else {
+ err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+ }
+ SetPageUptodate(page);
+
+ if (new_i_size &&
+ i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) {
+ i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT));
+ mark_inode_dirty_sync(inode);
+ }
+ return page;
+}
+
+static void read_end_io(struct bio *bio, int err)
+{
+ const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
+ struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
+
+ do {
+ struct page *page = bvec->bv_page;
+
+ if (--bvec >= bio->bi_io_vec)
+ prefetchw(&bvec->bv_page->flags);
+
+ if (uptodate) {
+ SetPageUptodate(page);
+ } else {
+ ClearPageUptodate(page);
+ SetPageError(page);
+ }
+ unlock_page(page);
+ } while (bvec >= bio->bi_io_vec);
+ kfree(bio->bi_private);
+ bio_put(bio);
+}
+
+/*
+ * Fill the locked page with data located in the block address.
+ * Read operation is synchronous, and caller must unlock the page.
+ */
+int f2fs_readpage(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blk_addr, int type)
+{
+ struct block_device *bdev = sbi->sb->s_bdev;
+ bool sync = (type == READ_SYNC);
+ struct bio *bio;
+
+ /* This page can be already read by other threads */
+ if (PageUptodate(page)) {
+ if (!sync)
+ unlock_page(page);
+ return 0;
+ }
+
+ down_read(&sbi->bio_sem);
+
+ /* Allocate a new bio */
+ bio = f2fs_bio_alloc(bdev, 1);
+
+ /* Initialize the bio */
+ bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
+ bio->bi_end_io = read_end_io;
+
+ if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) {
+ kfree(bio->bi_private);
+ bio_put(bio);
+ up_read(&sbi->bio_sem);
+ return -EFAULT;
+ }
+
+ submit_bio(type, bio);
+ up_read(&sbi->bio_sem);
+
+ /* wait for read completion if sync */
+ if (sync) {
+ lock_page(page);
+ if (PageError(page))
+ return -EIO;
+ }
+ return 0;
+}
+
+/*
+ * This function should be used by the data read flow only where it
+ * does not check the "create" flag that indicates block allocation.
+ * The reason for this special functionality is to exploit VFS readahead
+ * mechanism.
+ */
+static int get_data_block_ro(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
+{
+ unsigned int blkbits = inode->i_sb->s_blocksize_bits;
+ unsigned maxblocks = bh_result->b_size >> blkbits;
+ struct dnode_of_data dn;
+ pgoff_t pgofs;
+ int err;
+
+ /* Get the page offset from the block offset(iblock) */
+ pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits));
+
+ if (check_extent_cache(inode, pgofs, bh_result))
+ return 0;
+
+ /* When reading holes, we need its node page */
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, pgofs, RDONLY_NODE);
+ if (err)
+ return (err == -ENOENT) ? 0 : err;
+
+ /* It does not support data allocation */
+ BUG_ON(create);
+
+ if (dn.data_blkaddr != NEW_ADDR && dn.data_blkaddr != NULL_ADDR) {
+ int i;
+ unsigned int end_offset;
+
+ end_offset = IS_INODE(dn.node_page) ?
+ ADDRS_PER_INODE :
+ ADDRS_PER_BLOCK;
+
+ clear_buffer_new(bh_result);
+
+ /* Give more consecutive addresses for the read ahead */
+ for (i = 0; i < end_offset - dn.ofs_in_node; i++)
+ if (((datablock_addr(dn.node_page,
+ dn.ofs_in_node + i))
+ != (dn.data_blkaddr + i)) || maxblocks == i)
+ break;
+ map_bh(bh_result, inode->i_sb, dn.data_blkaddr);
+ bh_result->b_size = (i << blkbits);
+ }
+ f2fs_put_dnode(&dn);
+ return 0;
+}
+
+static int f2fs_read_data_page(struct file *file, struct page *page)
+{
+ return mpage_readpage(page, get_data_block_ro);
+}
+
+static int f2fs_read_data_pages(struct file *file,
+ struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages)
+{
+ return mpage_readpages(mapping, pages, nr_pages, get_data_block_ro);
+}
+
+int do_write_data_page(struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ block_t old_blk_addr, new_blk_addr;
+ struct dnode_of_data dn;
+ int err = 0;
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, page->index, RDONLY_NODE);
+ if (err)
+ return err;
+
+ old_blk_addr = dn.data_blkaddr;
+
+ /* This page is already truncated */
+ if (old_blk_addr == NULL_ADDR)
+ goto out_writepage;
+
+ set_page_writeback(page);
+
+ /*
+ * If current allocation needs SSR,
+ * it had better in-place writes for updated data.
+ */
+ if (old_blk_addr != NEW_ADDR && !is_cold_data(page) &&
+ need_inplace_update(inode)) {
+ rewrite_data_page(F2FS_SB(inode->i_sb), page,
+ old_blk_addr);
+ } else {
+ write_data_page(inode, page, &dn,
+ old_blk_addr, &new_blk_addr);
+ update_extent_cache(new_blk_addr, &dn);
+ F2FS_I(inode)->data_version =
+ le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver);
+ }
+out_writepage:
+ f2fs_put_dnode(&dn);
+ return err;
+}
+
+static int f2fs_write_data_page(struct page *page,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ loff_t i_size = i_size_read(inode);
+ const pgoff_t end_index = ((unsigned long long) i_size)
+ >> PAGE_CACHE_SHIFT;
+ unsigned offset;
+ int err = 0;
+
+ if (page->index < end_index)
+ goto out;
+
+ /*
+ * If the offset is out-of-range of file size,
+ * this page does not have to be written to disk.
+ */
+ offset = i_size & (PAGE_CACHE_SIZE - 1);
+ if ((page->index >= end_index + 1) || !offset) {
+ if (S_ISDIR(inode->i_mode)) {
+ dec_page_count(sbi, F2FS_DIRTY_DENTS);
+ inode_dec_dirty_dents(inode);
+ }
+ goto unlock_out;
+ }
+
+ zero_user_segment(page, offset, PAGE_CACHE_SIZE);
+out:
+ if (sbi->por_doing)
+ goto redirty_out;
+
+ if (wbc->for_reclaim && !S_ISDIR(inode->i_mode) && !is_cold_data(page))
+ goto redirty_out;
+
+ mutex_lock_op(sbi, DATA_WRITE);
+ if (S_ISDIR(inode->i_mode)) {
+ dec_page_count(sbi, F2FS_DIRTY_DENTS);
+ inode_dec_dirty_dents(inode);
+ }
+ err = do_write_data_page(page);
+ if (err && err != -ENOENT) {
+ wbc->pages_skipped++;
+ set_page_dirty(page);
+ }
+ mutex_unlock_op(sbi, DATA_WRITE);
+
+ if (wbc->for_reclaim)
+ f2fs_submit_bio(sbi, DATA, true);
+
+ if (err == -ENOENT)
+ goto unlock_out;
+
+ clear_cold_data(page);
+ unlock_page(page);
+
+ if (!wbc->for_reclaim && !S_ISDIR(inode->i_mode))
+ f2fs_balance_fs(sbi);
+ return 0;
+
+unlock_out:
+ unlock_page(page);
+ return (err == -ENOENT) ? 0 : err;
+
+redirty_out:
+ wbc->pages_skipped++;
+ set_page_dirty(page);
+ return AOP_WRITEPAGE_ACTIVATE;
+}
+
+#define MAX_DESIRED_PAGES_WP 4096
+
+static int __f2fs_writepage(struct page *page, struct writeback_control *wbc,
+ void *data)
+{
+ struct address_space *mapping = data;
+ int ret = mapping->a_ops->writepage(page, wbc);
+ mapping_set_error(mapping, ret);
+ return ret;
+}
+
+static int f2fs_write_data_pages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ int ret;
+ long excess_nrtw = 0, desired_nrtw;
+
+ if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) {
+ desired_nrtw = MAX_DESIRED_PAGES_WP;
+ excess_nrtw = desired_nrtw - wbc->nr_to_write;
+ wbc->nr_to_write = desired_nrtw;
+ }
+
+ if (!S_ISDIR(inode->i_mode))
+ mutex_lock(&sbi->writepages);
+ ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping);
+ if (!S_ISDIR(inode->i_mode))
+ mutex_unlock(&sbi->writepages);
+ f2fs_submit_bio(sbi, DATA, (wbc->sync_mode == WB_SYNC_ALL));
+
+ remove_dirty_dir_inode(inode);
+
+ wbc->nr_to_write -= excess_nrtw;
+ return ret;
+}
+
+static int f2fs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct page *page;
+ pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT;
+ struct dnode_of_data dn;
+ int err = 0;
+
+ /* for nobh_write_end */
+ *fsdata = NULL;
+
+ f2fs_balance_fs(sbi);
+
+ page = grab_cache_page_write_begin(mapping, index, flags);
+ if (!page)
+ return -ENOMEM;
+ *pagep = page;
+
+ mutex_lock_op(sbi, DATA_NEW);
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, index, 0);
+ if (err) {
+ mutex_unlock_op(sbi, DATA_NEW);
+ f2fs_put_page(page, 1);
+ return err;
+ }
+
+ if (dn.data_blkaddr == NULL_ADDR) {
+ err = reserve_new_block(&dn);
+ if (err) {
+ f2fs_put_dnode(&dn);
+ mutex_unlock_op(sbi, DATA_NEW);
+ f2fs_put_page(page, 1);
+ return err;
+ }
+ }
+ f2fs_put_dnode(&dn);
+
+ mutex_unlock_op(sbi, DATA_NEW);
+
+ if ((len == PAGE_CACHE_SIZE) || PageUptodate(page))
+ return 0;
+
+ if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) {
+ unsigned start = pos & (PAGE_CACHE_SIZE - 1);
+ unsigned end = start + len;
+
+ /* Reading beyond i_size is simple: memset to zero */
+ zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE);
+ return 0;
+ }
+
+ if (dn.data_blkaddr == NEW_ADDR) {
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+ } else {
+ err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return err;
+ }
+ }
+ SetPageUptodate(page);
+ clear_cold_data(page);
+ return 0;
+}
+
+static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
+ const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+{
+ struct file *file = iocb->ki_filp;
+ struct inode *inode = file->f_mapping->host;
+
+ if (rw == WRITE)
+ return 0;
+
+ /* Needs synchronization with the cleaner */
+ return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+ get_data_block_ro);
+}
+
+static void f2fs_invalidate_data_page(struct page *page, unsigned long offset)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ if (S_ISDIR(inode->i_mode) && PageDirty(page)) {
+ dec_page_count(sbi, F2FS_DIRTY_DENTS);
+ inode_dec_dirty_dents(inode);
+ }
+ ClearPagePrivate(page);
+}
+
+static int f2fs_release_data_page(struct page *page, gfp_t wait)
+{
+ ClearPagePrivate(page);
+ return 0;
+}
+
+static int f2fs_set_data_page_dirty(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+ struct inode *inode = mapping->host;
+
+ SetPageUptodate(page);
+ if (!PageDirty(page)) {
+ __set_page_dirty_nobuffers(page);
+ set_dirty_dir_page(inode, page);
+ return 1;
+ }
+ return 0;
+}
+
+static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
+{
+ return generic_block_bmap(mapping, block, get_data_block_ro);
+}
+
+const struct address_space_operations f2fs_dblock_aops = {
+ .readpage = f2fs_read_data_page,
+ .readpages = f2fs_read_data_pages,
+ .writepage = f2fs_write_data_page,
+ .writepages = f2fs_write_data_pages,
+ .write_begin = f2fs_write_begin,
+ .write_end = nobh_write_end,
+ .set_page_dirty = f2fs_set_data_page_dirty,
+ .invalidatepage = f2fs_invalidate_data_page,
+ .releasepage = f2fs_release_data_page,
+ .direct_IO = f2fs_direct_IO,
+ .bmap = f2fs_bmap,
+};
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
new file mode 100644
index 000000000000..c8c37307b326
--- /dev/null
+++ b/fs/f2fs/debug.c
@@ -0,0 +1,353 @@
+/*
+ * f2fs debugging statistics
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ * Copyright (c) 2012 Linux Foundation
+ * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/fs.h>
+#include <linux/backing-dev.h>
+#include <linux/proc_fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/blkdev.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+#include "gc.h"
+
+static LIST_HEAD(f2fs_stat_list);
+static struct dentry *debugfs_root;
+static DEFINE_MUTEX(f2fs_stat_mutex);
+
+static void update_general_status(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_stat_info *si = sbi->stat_info;
+ int i;
+
+ /* valid check of the segment numbers */
+ si->hit_ext = sbi->read_hit_ext;
+ si->total_ext = sbi->total_hit_ext;
+ si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
+ si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
+ si->ndirty_dirs = sbi->n_dirty_dirs;
+ si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
+ si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
+ si->rsvd_segs = reserved_segments(sbi);
+ si->overp_segs = overprovision_segments(sbi);
+ si->valid_count = valid_user_blocks(sbi);
+ si->valid_node_count = valid_node_count(sbi);
+ si->valid_inode_count = valid_inode_count(sbi);
+ si->utilization = utilization(sbi);
+
+ si->free_segs = free_segments(sbi);
+ si->free_secs = free_sections(sbi);
+ si->prefree_count = prefree_segments(sbi);
+ si->dirty_count = dirty_segments(sbi);
+ si->node_pages = sbi->node_inode->i_mapping->nrpages;
+ si->meta_pages = sbi->meta_inode->i_mapping->nrpages;
+ si->nats = NM_I(sbi)->nat_cnt;
+ si->sits = SIT_I(sbi)->dirty_sentries;
+ si->fnids = NM_I(sbi)->fcnt;
+ si->bg_gc = sbi->bg_gc;
+ si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg)
+ * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
+ / 2;
+ si->util_valid = (int)(written_block_count(sbi) >>
+ sbi->log_blocks_per_seg)
+ * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
+ / 2;
+ si->util_invalid = 50 - si->util_free - si->util_valid;
+ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {
+ struct curseg_info *curseg = CURSEG_I(sbi, i);
+ si->curseg[i] = curseg->segno;
+ si->cursec[i] = curseg->segno / sbi->segs_per_sec;
+ si->curzone[i] = si->cursec[i] / sbi->secs_per_zone;
+ }
+
+ for (i = 0; i < 2; i++) {
+ si->segment_count[i] = sbi->segment_count[i];
+ si->block_count[i] = sbi->block_count[i];
+ }
+}
+
+/*
+ * This function calculates BDF of every segments
+ */
+static void update_sit_info(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_stat_info *si = sbi->stat_info;
+ unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist;
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int segno, vblocks;
+ int ndirty = 0;
+
+ bimodal = 0;
+ total_vblocks = 0;
+ blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg);
+ hblks_per_sec = blks_per_sec / 2;
+ mutex_lock(&sit_i->sentry_lock);
+ for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) {
+ vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
+ dist = abs(vblocks - hblks_per_sec);
+ bimodal += dist * dist;
+
+ if (vblocks > 0 && vblocks < blks_per_sec) {
+ total_vblocks += vblocks;
+ ndirty++;
+ }
+ }
+ mutex_unlock(&sit_i->sentry_lock);
+ dist = sbi->total_sections * hblks_per_sec * hblks_per_sec / 100;
+ si->bimodal = bimodal / dist;
+ if (si->dirty_count)
+ si->avg_vblocks = total_vblocks / ndirty;
+ else
+ si->avg_vblocks = 0;
+}
+
+/*
+ * This function calculates memory footprint.
+ */
+static void update_mem_info(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_stat_info *si = sbi->stat_info;
+ unsigned npages;
+
+ if (si->base_mem)
+ goto get_cache;
+
+ si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize;
+ si->base_mem += 2 * sizeof(struct f2fs_inode_info);
+ si->base_mem += sizeof(*sbi->ckpt);
+
+ /* build sm */
+ si->base_mem += sizeof(struct f2fs_sm_info);
+
+ /* build sit */
+ si->base_mem += sizeof(struct sit_info);
+ si->base_mem += TOTAL_SEGS(sbi) * sizeof(struct seg_entry);
+ si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi));
+ si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * TOTAL_SEGS(sbi);
+ if (sbi->segs_per_sec > 1)
+ si->base_mem += sbi->total_sections *
+ sizeof(struct sec_entry);
+ si->base_mem += __bitmap_size(sbi, SIT_BITMAP);
+
+ /* build free segmap */
+ si->base_mem += sizeof(struct free_segmap_info);
+ si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi));
+ si->base_mem += f2fs_bitmap_size(sbi->total_sections);
+
+ /* build curseg */
+ si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE;
+ si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE;
+
+ /* build dirty segmap */
+ si->base_mem += sizeof(struct dirty_seglist_info);
+ si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(TOTAL_SEGS(sbi));
+ si->base_mem += 2 * f2fs_bitmap_size(TOTAL_SEGS(sbi));
+
+ /* buld nm */
+ si->base_mem += sizeof(struct f2fs_nm_info);
+ si->base_mem += __bitmap_size(sbi, NAT_BITMAP);
+
+ /* build gc */
+ si->base_mem += sizeof(struct f2fs_gc_kthread);
+
+get_cache:
+ /* free nids */
+ si->cache_mem = NM_I(sbi)->fcnt;
+ si->cache_mem += NM_I(sbi)->nat_cnt;
+ npages = sbi->node_inode->i_mapping->nrpages;
+ si->cache_mem += npages << PAGE_CACHE_SHIFT;
+ npages = sbi->meta_inode->i_mapping->nrpages;
+ si->cache_mem += npages << PAGE_CACHE_SHIFT;
+ si->cache_mem += sbi->n_orphans * sizeof(struct orphan_inode_entry);
+ si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry);
+}
+
+static int stat_show(struct seq_file *s, void *v)
+{
+ struct f2fs_stat_info *si, *next;
+ int i = 0;
+ int j;
+
+ mutex_lock(&f2fs_stat_mutex);
+ list_for_each_entry_safe(si, next, &f2fs_stat_list, stat_list) {
+
+ update_general_status(si->sbi);
+
+ seq_printf(s, "\n=====[ partition info. #%d ]=====\n", i++);
+ seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ",
+ si->sit_area_segs, si->nat_area_segs);
+ seq_printf(s, "[SSA: %d] [MAIN: %d",
+ si->ssa_area_segs, si->main_area_segs);
+ seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
+ si->overp_segs, si->rsvd_segs);
+ seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",
+ si->utilization, si->valid_count);
+ seq_printf(s, " - Node: %u (Inode: %u, ",
+ si->valid_node_count, si->valid_inode_count);
+ seq_printf(s, "Other: %u)\n - Data: %u\n",
+ si->valid_node_count - si->valid_inode_count,
+ si->valid_count - si->valid_node_count);
+ seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n",
+ si->main_area_segs, si->main_area_sections,
+ si->main_area_zones);
+ seq_printf(s, " - COLD data: %d, %d, %d\n",
+ si->curseg[CURSEG_COLD_DATA],
+ si->cursec[CURSEG_COLD_DATA],
+ si->curzone[CURSEG_COLD_DATA]);
+ seq_printf(s, " - WARM data: %d, %d, %d\n",
+ si->curseg[CURSEG_WARM_DATA],
+ si->cursec[CURSEG_WARM_DATA],
+ si->curzone[CURSEG_WARM_DATA]);
+ seq_printf(s, " - HOT data: %d, %d, %d\n",
+ si->curseg[CURSEG_HOT_DATA],
+ si->cursec[CURSEG_HOT_DATA],
+ si->curzone[CURSEG_HOT_DATA]);
+ seq_printf(s, " - Dir dnode: %d, %d, %d\n",
+ si->curseg[CURSEG_HOT_NODE],
+ si->cursec[CURSEG_HOT_NODE],
+ si->curzone[CURSEG_HOT_NODE]);
+ seq_printf(s, " - File dnode: %d, %d, %d\n",
+ si->curseg[CURSEG_WARM_NODE],
+ si->cursec[CURSEG_WARM_NODE],
+ si->curzone[CURSEG_WARM_NODE]);
+ seq_printf(s, " - Indir nodes: %d, %d, %d\n",
+ si->curseg[CURSEG_COLD_NODE],
+ si->cursec[CURSEG_COLD_NODE],
+ si->curzone[CURSEG_COLD_NODE]);
+ seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n",
+ si->main_area_segs - si->dirty_count -
+ si->prefree_count - si->free_segs,
+ si->dirty_count);
+ seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n",
+ si->prefree_count, si->free_segs, si->free_secs);
+ seq_printf(s, "GC calls: %d (BG: %d)\n",
+ si->call_count, si->bg_gc);
+ seq_printf(s, " - data segments : %d\n", si->data_segs);
+ seq_printf(s, " - node segments : %d\n", si->node_segs);
+ seq_printf(s, "Try to move %d blocks\n", si->tot_blks);
+ seq_printf(s, " - data blocks : %d\n", si->data_blks);
+ seq_printf(s, " - node blocks : %d\n", si->node_blks);
+ seq_printf(s, "\nExtent Hit Ratio: %d / %d\n",
+ si->hit_ext, si->total_ext);
+ seq_printf(s, "\nBalancing F2FS Async:\n");
+ seq_printf(s, " - nodes %4d in %4d\n",
+ si->ndirty_node, si->node_pages);
+ seq_printf(s, " - dents %4d in dirs:%4d\n",
+ si->ndirty_dent, si->ndirty_dirs);
+ seq_printf(s, " - meta %4d in %4d\n",
+ si->ndirty_meta, si->meta_pages);
+ seq_printf(s, " - NATs %5d > %lu\n",
+ si->nats, NM_WOUT_THRESHOLD);
+ seq_printf(s, " - SITs: %5d\n - free_nids: %5d\n",
+ si->sits, si->fnids);
+ seq_printf(s, "\nDistribution of User Blocks:");
+ seq_printf(s, " [ valid | invalid | free ]\n");
+ seq_printf(s, " [");
+
+ for (j = 0; j < si->util_valid; j++)
+ seq_printf(s, "-");
+ seq_printf(s, "|");
+
+ for (j = 0; j < si->util_invalid; j++)
+ seq_printf(s, "-");
+ seq_printf(s, "|");
+
+ for (j = 0; j < si->util_free; j++)
+ seq_printf(s, "-");
+ seq_printf(s, "]\n\n");
+ seq_printf(s, "SSR: %u blocks in %u segments\n",
+ si->block_count[SSR], si->segment_count[SSR]);
+ seq_printf(s, "LFS: %u blocks in %u segments\n",
+ si->block_count[LFS], si->segment_count[LFS]);
+
+ /* segment usage info */
+ update_sit_info(si->sbi);
+ seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n",
+ si->bimodal, si->avg_vblocks);
+
+ /* memory footprint */
+ update_mem_info(si->sbi);
+ seq_printf(s, "\nMemory: %u KB = static: %u + cached: %u\n",
+ (si->base_mem + si->cache_mem) >> 10,
+ si->base_mem >> 10, si->cache_mem >> 10);
+ }
+ mutex_unlock(&f2fs_stat_mutex);
+ return 0;
+}
+
+static int stat_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, stat_show, inode->i_private);
+}
+
+static const struct file_operations stat_fops = {
+ .open = stat_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+int f2fs_build_stats(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
+ struct f2fs_stat_info *si;
+
+ sbi->stat_info = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL);
+ if (!sbi->stat_info)
+ return -ENOMEM;
+
+ si = sbi->stat_info;
+ si->all_area_segs = le32_to_cpu(raw_super->segment_count);
+ si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit);
+ si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat);
+ si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa);
+ si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
+ si->main_area_sections = le32_to_cpu(raw_super->section_count);
+ si->main_area_zones = si->main_area_sections /
+ le32_to_cpu(raw_super->secs_per_zone);
+ si->sbi = sbi;
+
+ mutex_lock(&f2fs_stat_mutex);
+ list_add_tail(&si->stat_list, &f2fs_stat_list);
+ mutex_unlock(&f2fs_stat_mutex);
+
+ return 0;
+}
+
+void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_stat_info *si = sbi->stat_info;
+
+ mutex_lock(&f2fs_stat_mutex);
+ list_del(&si->stat_list);
+ mutex_unlock(&f2fs_stat_mutex);
+
+ kfree(sbi->stat_info);
+}
+
+void __init f2fs_create_root_stats(void)
+{
+ debugfs_root = debugfs_create_dir("f2fs", NULL);
+ if (debugfs_root)
+ debugfs_create_file("status", S_IRUGO, debugfs_root,
+ NULL, &stat_fops);
+}
+
+void f2fs_destroy_root_stats(void)
+{
+ debugfs_remove_recursive(debugfs_root);
+ debugfs_root = NULL;
+}
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
new file mode 100644
index 000000000000..989980e16d0b
--- /dev/null
+++ b/fs/f2fs/dir.c
@@ -0,0 +1,674 @@
+/*
+ * fs/f2fs/dir.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include "f2fs.h"
+#include "node.h"
+#include "acl.h"
+
+static unsigned long dir_blocks(struct inode *inode)
+{
+ return ((unsigned long long) (i_size_read(inode) + PAGE_CACHE_SIZE - 1))
+ >> PAGE_CACHE_SHIFT;
+}
+
+static unsigned int dir_buckets(unsigned int level)
+{
+ if (level < MAX_DIR_HASH_DEPTH / 2)
+ return 1 << level;
+ else
+ return 1 << ((MAX_DIR_HASH_DEPTH / 2) - 1);
+}
+
+static unsigned int bucket_blocks(unsigned int level)
+{
+ if (level < MAX_DIR_HASH_DEPTH / 2)
+ return 2;
+ else
+ return 4;
+}
+
+static unsigned char f2fs_filetype_table[F2FS_FT_MAX] = {
+ [F2FS_FT_UNKNOWN] = DT_UNKNOWN,
+ [F2FS_FT_REG_FILE] = DT_REG,
+ [F2FS_FT_DIR] = DT_DIR,
+ [F2FS_FT_CHRDEV] = DT_CHR,
+ [F2FS_FT_BLKDEV] = DT_BLK,
+ [F2FS_FT_FIFO] = DT_FIFO,
+ [F2FS_FT_SOCK] = DT_SOCK,
+ [F2FS_FT_SYMLINK] = DT_LNK,
+};
+
+#define S_SHIFT 12
+static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = {
+ [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE,
+ [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR,
+ [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV,
+ [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV,
+ [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO,
+ [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK,
+ [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK,
+};
+
+static void set_de_type(struct f2fs_dir_entry *de, struct inode *inode)
+{
+ mode_t mode = inode->i_mode;
+ de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
+}
+
+static unsigned long dir_block_index(unsigned int level, unsigned int idx)
+{
+ unsigned long i;
+ unsigned long bidx = 0;
+
+ for (i = 0; i < level; i++)
+ bidx += dir_buckets(i) * bucket_blocks(i);
+ bidx += idx * bucket_blocks(level);
+ return bidx;
+}
+
+static bool early_match_name(const char *name, size_t namelen,
+ f2fs_hash_t namehash, struct f2fs_dir_entry *de)
+{
+ if (le16_to_cpu(de->name_len) != namelen)
+ return false;
+
+ if (de->hash_code != namehash)
+ return false;
+
+ return true;
+}
+
+static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
+ const char *name, size_t namelen, int *max_slots,
+ f2fs_hash_t namehash, struct page **res_page)
+{
+ struct f2fs_dir_entry *de;
+ unsigned long bit_pos, end_pos, next_pos;
+ struct f2fs_dentry_block *dentry_blk = kmap(dentry_page);
+ int slots;
+
+ bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK, 0);
+ while (bit_pos < NR_DENTRY_IN_BLOCK) {
+ de = &dentry_blk->dentry[bit_pos];
+ slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
+
+ if (early_match_name(name, namelen, namehash, de)) {
+ if (!memcmp(dentry_blk->filename[bit_pos],
+ name, namelen)) {
+ *res_page = dentry_page;
+ goto found;
+ }
+ }
+ next_pos = bit_pos + slots;
+ bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK, next_pos);
+ if (bit_pos >= NR_DENTRY_IN_BLOCK)
+ end_pos = NR_DENTRY_IN_BLOCK;
+ else
+ end_pos = bit_pos;
+ if (*max_slots < end_pos - next_pos)
+ *max_slots = end_pos - next_pos;
+ }
+
+ de = NULL;
+ kunmap(dentry_page);
+found:
+ return de;
+}
+
+static struct f2fs_dir_entry *find_in_level(struct inode *dir,
+ unsigned int level, const char *name, size_t namelen,
+ f2fs_hash_t namehash, struct page **res_page)
+{
+ int s = GET_DENTRY_SLOTS(namelen);
+ unsigned int nbucket, nblock;
+ unsigned int bidx, end_block;
+ struct page *dentry_page;
+ struct f2fs_dir_entry *de = NULL;
+ bool room = false;
+ int max_slots = 0;
+
+ BUG_ON(level > MAX_DIR_HASH_DEPTH);
+
+ nbucket = dir_buckets(level);
+ nblock = bucket_blocks(level);
+
+ bidx = dir_block_index(level, le32_to_cpu(namehash) % nbucket);
+ end_block = bidx + nblock;
+
+ for (; bidx < end_block; bidx++) {
+ /* no need to allocate new dentry pages to all the indices */
+ dentry_page = find_data_page(dir, bidx);
+ if (IS_ERR(dentry_page)) {
+ room = true;
+ continue;
+ }
+
+ de = find_in_block(dentry_page, name, namelen,
+ &max_slots, namehash, res_page);
+ if (de)
+ break;
+
+ if (max_slots >= s)
+ room = true;
+ f2fs_put_page(dentry_page, 0);
+ }
+
+ if (!de && room && F2FS_I(dir)->chash != namehash) {
+ F2FS_I(dir)->chash = namehash;
+ F2FS_I(dir)->clevel = level;
+ }
+
+ return de;
+}
+
+/*
+ * Find an entry in the specified directory with the wanted name.
+ * It returns the page where the entry was found (as a parameter - res_page),
+ * and the entry itself. Page is returned mapped and unlocked.
+ * Entry is guaranteed to be valid.
+ */
+struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
+ struct qstr *child, struct page **res_page)
+{
+ const char *name = child->name;
+ size_t namelen = child->len;
+ unsigned long npages = dir_blocks(dir);
+ struct f2fs_dir_entry *de = NULL;
+ f2fs_hash_t name_hash;
+ unsigned int max_depth;
+ unsigned int level;
+
+ if (npages == 0)
+ return NULL;
+
+ *res_page = NULL;
+
+ name_hash = f2fs_dentry_hash(name, namelen);
+ max_depth = F2FS_I(dir)->i_current_depth;
+
+ for (level = 0; level < max_depth; level++) {
+ de = find_in_level(dir, level, name,
+ namelen, name_hash, res_page);
+ if (de)
+ break;
+ }
+ if (!de && F2FS_I(dir)->chash != name_hash) {
+ F2FS_I(dir)->chash = name_hash;
+ F2FS_I(dir)->clevel = level - 1;
+ }
+ return de;
+}
+
+struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p)
+{
+ struct page *page = NULL;
+ struct f2fs_dir_entry *de = NULL;
+ struct f2fs_dentry_block *dentry_blk = NULL;
+
+ page = get_lock_data_page(dir, 0);
+ if (IS_ERR(page))
+ return NULL;
+
+ dentry_blk = kmap(page);
+ de = &dentry_blk->dentry[1];
+ *p = page;
+ unlock_page(page);
+ return de;
+}
+
+ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr)
+{
+ ino_t res = 0;
+ struct f2fs_dir_entry *de;
+ struct page *page;
+
+ de = f2fs_find_entry(dir, qstr, &page);
+ if (de) {
+ res = le32_to_cpu(de->ino);
+ kunmap(page);
+ f2fs_put_page(page, 0);
+ }
+
+ return res;
+}
+
+void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
+ struct page *page, struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+
+ mutex_lock_op(sbi, DENTRY_OPS);
+ lock_page(page);
+ wait_on_page_writeback(page);
+ de->ino = cpu_to_le32(inode->i_ino);
+ set_de_type(de, inode);
+ kunmap(page);
+ set_page_dirty(page);
+ dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(dir);
+
+ /* update parent inode number before releasing dentry page */
+ F2FS_I(inode)->i_pino = dir->i_ino;
+
+ f2fs_put_page(page, 1);
+ mutex_unlock_op(sbi, DENTRY_OPS);
+}
+
+void init_dent_inode(struct dentry *dentry, struct page *ipage)
+{
+ struct f2fs_node *rn;
+
+ if (IS_ERR(ipage))
+ return;
+
+ wait_on_page_writeback(ipage);
+
+ /* copy dentry info. to this inode page */
+ rn = (struct f2fs_node *)page_address(ipage);
+ rn->i.i_namelen = cpu_to_le32(dentry->d_name.len);
+ memcpy(rn->i.i_name, dentry->d_name.name, dentry->d_name.len);
+ set_page_dirty(ipage);
+}
+
+static int init_inode_metadata(struct inode *inode, struct dentry *dentry)
+{
+ struct inode *dir = dentry->d_parent->d_inode;
+
+ if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
+ int err;
+ err = new_inode_page(inode, dentry);
+ if (err)
+ return err;
+
+ if (S_ISDIR(inode->i_mode)) {
+ err = f2fs_make_empty(inode, dir);
+ if (err) {
+ remove_inode_page(inode);
+ return err;
+ }
+ }
+
+ err = f2fs_init_acl(inode, dir);
+ if (err) {
+ remove_inode_page(inode);
+ return err;
+ }
+ } else {
+ struct page *ipage;
+ ipage = get_node_page(F2FS_SB(dir->i_sb), inode->i_ino);
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);
+ set_cold_node(inode, ipage);
+ init_dent_inode(dentry, ipage);
+ f2fs_put_page(ipage, 1);
+ }
+ if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) {
+ inc_nlink(inode);
+ f2fs_write_inode(inode, NULL);
+ }
+ return 0;
+}
+
+static void update_parent_metadata(struct inode *dir, struct inode *inode,
+ unsigned int current_depth)
+{
+ bool need_dir_update = false;
+
+ if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
+ if (S_ISDIR(inode->i_mode)) {
+ inc_nlink(dir);
+ need_dir_update = true;
+ }
+ clear_inode_flag(F2FS_I(inode), FI_NEW_INODE);
+ }
+ dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+ if (F2FS_I(dir)->i_current_depth != current_depth) {
+ F2FS_I(dir)->i_current_depth = current_depth;
+ need_dir_update = true;
+ }
+
+ if (need_dir_update)
+ f2fs_write_inode(dir, NULL);
+ else
+ mark_inode_dirty(dir);
+
+ if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK))
+ clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
+}
+
+static int room_for_filename(struct f2fs_dentry_block *dentry_blk, int slots)
+{
+ int bit_start = 0;
+ int zero_start, zero_end;
+next:
+ zero_start = find_next_zero_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK,
+ bit_start);
+ if (zero_start >= NR_DENTRY_IN_BLOCK)
+ return NR_DENTRY_IN_BLOCK;
+
+ zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK,
+ zero_start);
+ if (zero_end - zero_start >= slots)
+ return zero_start;
+
+ bit_start = zero_end + 1;
+
+ if (zero_end + 1 >= NR_DENTRY_IN_BLOCK)
+ return NR_DENTRY_IN_BLOCK;
+ goto next;
+}
+
+int f2fs_add_link(struct dentry *dentry, struct inode *inode)
+{
+ unsigned int bit_pos;
+ unsigned int level;
+ unsigned int current_depth;
+ unsigned long bidx, block;
+ f2fs_hash_t dentry_hash;
+ struct f2fs_dir_entry *de;
+ unsigned int nbucket, nblock;
+ struct inode *dir = dentry->d_parent->d_inode;
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+ const char *name = dentry->d_name.name;
+ size_t namelen = dentry->d_name.len;
+ struct page *dentry_page = NULL;
+ struct f2fs_dentry_block *dentry_blk = NULL;
+ int slots = GET_DENTRY_SLOTS(namelen);
+ int err = 0;
+ int i;
+
+ dentry_hash = f2fs_dentry_hash(name, dentry->d_name.len);
+ level = 0;
+ current_depth = F2FS_I(dir)->i_current_depth;
+ if (F2FS_I(dir)->chash == dentry_hash) {
+ level = F2FS_I(dir)->clevel;
+ F2FS_I(dir)->chash = 0;
+ }
+
+start:
+ if (current_depth == MAX_DIR_HASH_DEPTH)
+ return -ENOSPC;
+
+ /* Increase the depth, if required */
+ if (level == current_depth)
+ ++current_depth;
+
+ nbucket = dir_buckets(level);
+ nblock = bucket_blocks(level);
+
+ bidx = dir_block_index(level, (le32_to_cpu(dentry_hash) % nbucket));
+
+ for (block = bidx; block <= (bidx + nblock - 1); block++) {
+ mutex_lock_op(sbi, DENTRY_OPS);
+ dentry_page = get_new_data_page(dir, block, true);
+ if (IS_ERR(dentry_page)) {
+ mutex_unlock_op(sbi, DENTRY_OPS);
+ return PTR_ERR(dentry_page);
+ }
+
+ dentry_blk = kmap(dentry_page);
+ bit_pos = room_for_filename(dentry_blk, slots);
+ if (bit_pos < NR_DENTRY_IN_BLOCK)
+ goto add_dentry;
+
+ kunmap(dentry_page);
+ f2fs_put_page(dentry_page, 1);
+ mutex_unlock_op(sbi, DENTRY_OPS);
+ }
+
+ /* Move to next level to find the empty slot for new dentry */
+ ++level;
+ goto start;
+add_dentry:
+ err = init_inode_metadata(inode, dentry);
+ if (err)
+ goto fail;
+
+ wait_on_page_writeback(dentry_page);
+
+ de = &dentry_blk->dentry[bit_pos];
+ de->hash_code = dentry_hash;
+ de->name_len = cpu_to_le16(namelen);
+ memcpy(dentry_blk->filename[bit_pos], name, namelen);
+ de->ino = cpu_to_le32(inode->i_ino);
+ set_de_type(de, inode);
+ for (i = 0; i < slots; i++)
+ test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
+ set_page_dirty(dentry_page);
+
+ update_parent_metadata(dir, inode, current_depth);
+
+ /* update parent inode number before releasing dentry page */
+ F2FS_I(inode)->i_pino = dir->i_ino;
+fail:
+ kunmap(dentry_page);
+ f2fs_put_page(dentry_page, 1);
+ mutex_unlock_op(sbi, DENTRY_OPS);
+ return err;
+}
+
+/*
+ * It only removes the dentry from the dentry page,corresponding name
+ * entry in name page does not need to be touched during deletion.
+ */
+void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
+ struct inode *inode)
+{
+ struct f2fs_dentry_block *dentry_blk;
+ unsigned int bit_pos;
+ struct address_space *mapping = page->mapping;
+ struct inode *dir = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+ int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
+ void *kaddr = page_address(page);
+ int i;
+
+ mutex_lock_op(sbi, DENTRY_OPS);
+
+ lock_page(page);
+ wait_on_page_writeback(page);
+
+ dentry_blk = (struct f2fs_dentry_block *)kaddr;
+ bit_pos = dentry - (struct f2fs_dir_entry *)dentry_blk->dentry;
+ for (i = 0; i < slots; i++)
+ test_and_clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
+
+ /* Let's check and deallocate this dentry page */
+ bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK,
+ 0);
+ kunmap(page); /* kunmap - pair of f2fs_find_entry */
+ set_page_dirty(page);
+
+ dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+
+ if (inode && S_ISDIR(inode->i_mode)) {
+ drop_nlink(dir);
+ f2fs_write_inode(dir, NULL);
+ } else {
+ mark_inode_dirty(dir);
+ }
+
+ if (inode) {
+ inode->i_ctime = CURRENT_TIME;
+ drop_nlink(inode);
+ if (S_ISDIR(inode->i_mode)) {
+ drop_nlink(inode);
+ i_size_write(inode, 0);
+ }
+ f2fs_write_inode(inode, NULL);
+ if (inode->i_nlink == 0)
+ add_orphan_inode(sbi, inode->i_ino);
+ }
+
+ if (bit_pos == NR_DENTRY_IN_BLOCK) {
+ truncate_hole(dir, page->index, page->index + 1);
+ clear_page_dirty_for_io(page);
+ ClearPageUptodate(page);
+ dec_page_count(sbi, F2FS_DIRTY_DENTS);
+ inode_dec_dirty_dents(dir);
+ }
+ f2fs_put_page(page, 1);
+
+ mutex_unlock_op(sbi, DENTRY_OPS);
+}
+
+int f2fs_make_empty(struct inode *inode, struct inode *parent)
+{
+ struct page *dentry_page;
+ struct f2fs_dentry_block *dentry_blk;
+ struct f2fs_dir_entry *de;
+ void *kaddr;
+
+ dentry_page = get_new_data_page(inode, 0, true);
+ if (IS_ERR(dentry_page))
+ return PTR_ERR(dentry_page);
+
+ kaddr = kmap_atomic(dentry_page);
+ dentry_blk = (struct f2fs_dentry_block *)kaddr;
+
+ de = &dentry_blk->dentry[0];
+ de->name_len = cpu_to_le16(1);
+ de->hash_code = f2fs_dentry_hash(".", 1);
+ de->ino = cpu_to_le32(inode->i_ino);
+ memcpy(dentry_blk->filename[0], ".", 1);
+ set_de_type(de, inode);
+
+ de = &dentry_blk->dentry[1];
+ de->hash_code = f2fs_dentry_hash("..", 2);
+ de->name_len = cpu_to_le16(2);
+ de->ino = cpu_to_le32(parent->i_ino);
+ memcpy(dentry_blk->filename[1], "..", 2);
+ set_de_type(de, inode);
+
+ test_and_set_bit_le(0, &dentry_blk->dentry_bitmap);
+ test_and_set_bit_le(1, &dentry_blk->dentry_bitmap);
+ kunmap_atomic(kaddr);
+
+ set_page_dirty(dentry_page);
+ f2fs_put_page(dentry_page, 1);
+ return 0;
+}
+
+bool f2fs_empty_dir(struct inode *dir)
+{
+ unsigned long bidx;
+ struct page *dentry_page;
+ unsigned int bit_pos;
+ struct f2fs_dentry_block *dentry_blk;
+ unsigned long nblock = dir_blocks(dir);
+
+ for (bidx = 0; bidx < nblock; bidx++) {
+ void *kaddr;
+ dentry_page = get_lock_data_page(dir, bidx);
+ if (IS_ERR(dentry_page)) {
+ if (PTR_ERR(dentry_page) == -ENOENT)
+ continue;
+ else
+ return false;
+ }
+
+ kaddr = kmap_atomic(dentry_page);
+ dentry_blk = (struct f2fs_dentry_block *)kaddr;
+ if (bidx == 0)
+ bit_pos = 2;
+ else
+ bit_pos = 0;
+ bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK,
+ bit_pos);
+ kunmap_atomic(kaddr);
+
+ f2fs_put_page(dentry_page, 1);
+
+ if (bit_pos < NR_DENTRY_IN_BLOCK)
+ return false;
+ }
+ return true;
+}
+
+static int f2fs_readdir(struct file *file, void *dirent, filldir_t filldir)
+{
+ unsigned long pos = file->f_pos;
+ struct inode *inode = file->f_dentry->d_inode;
+ unsigned long npages = dir_blocks(inode);
+ unsigned char *types = NULL;
+ unsigned int bit_pos = 0, start_bit_pos = 0;
+ int over = 0;
+ struct f2fs_dentry_block *dentry_blk = NULL;
+ struct f2fs_dir_entry *de = NULL;
+ struct page *dentry_page = NULL;
+ unsigned int n = 0;
+ unsigned char d_type = DT_UNKNOWN;
+ int slots;
+
+ types = f2fs_filetype_table;
+ bit_pos = (pos % NR_DENTRY_IN_BLOCK);
+ n = (pos / NR_DENTRY_IN_BLOCK);
+
+ for ( ; n < npages; n++) {
+ dentry_page = get_lock_data_page(inode, n);
+ if (IS_ERR(dentry_page))
+ continue;
+
+ start_bit_pos = bit_pos;
+ dentry_blk = kmap(dentry_page);
+ while (bit_pos < NR_DENTRY_IN_BLOCK) {
+ d_type = DT_UNKNOWN;
+ bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_DENTRY_IN_BLOCK,
+ bit_pos);
+ if (bit_pos >= NR_DENTRY_IN_BLOCK)
+ break;
+
+ de = &dentry_blk->dentry[bit_pos];
+ if (types && de->file_type < F2FS_FT_MAX)
+ d_type = types[de->file_type];
+
+ over = filldir(dirent,
+ dentry_blk->filename[bit_pos],
+ le16_to_cpu(de->name_len),
+ (n * NR_DENTRY_IN_BLOCK) + bit_pos,
+ le32_to_cpu(de->ino), d_type);
+ if (over) {
+ file->f_pos += bit_pos - start_bit_pos;
+ goto success;
+ }
+ slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
+ bit_pos += slots;
+ }
+ bit_pos = 0;
+ file->f_pos = (n + 1) * NR_DENTRY_IN_BLOCK;
+ kunmap(dentry_page);
+ f2fs_put_page(dentry_page, 1);
+ dentry_page = NULL;
+ }
+success:
+ if (dentry_page && !IS_ERR(dentry_page)) {
+ kunmap(dentry_page);
+ f2fs_put_page(dentry_page, 1);
+ }
+
+ return 0;
+}
+
+const struct file_operations f2fs_dir_operations = {
+ .llseek = generic_file_llseek,
+ .read = generic_read_dir,
+ .readdir = f2fs_readdir,
+ .fsync = f2fs_sync_file,
+ .unlocked_ioctl = f2fs_ioctl,
+};
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
new file mode 100644
index 000000000000..c8e2d751ef9c
--- /dev/null
+++ b/fs/f2fs/f2fs.h
@@ -0,0 +1,1087 @@
+/*
+ * fs/f2fs/f2fs.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _LINUX_F2FS_H
+#define _LINUX_F2FS_H
+
+#include <linux/types.h>
+#include <linux/page-flags.h>
+#include <linux/buffer_head.h>
+#include <linux/slab.h>
+#include <linux/crc32.h>
+#include <linux/magic.h>
+
+/*
+ * For mount options
+ */
+#define F2FS_MOUNT_BG_GC 0x00000001
+#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002
+#define F2FS_MOUNT_DISCARD 0x00000004
+#define F2FS_MOUNT_NOHEAP 0x00000008
+#define F2FS_MOUNT_XATTR_USER 0x00000010
+#define F2FS_MOUNT_POSIX_ACL 0x00000020
+#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
+
+#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
+#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
+#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option)
+
+#define ver_after(a, b) (typecheck(unsigned long long, a) && \
+ typecheck(unsigned long long, b) && \
+ ((long long)((a) - (b)) > 0))
+
+typedef u64 block_t;
+typedef u32 nid_t;
+
+struct f2fs_mount_info {
+ unsigned int opt;
+};
+
+static inline __u32 f2fs_crc32(void *buff, size_t len)
+{
+ return crc32_le(F2FS_SUPER_MAGIC, buff, len);
+}
+
+static inline bool f2fs_crc_valid(__u32 blk_crc, void *buff, size_t buff_size)
+{
+ return f2fs_crc32(buff, buff_size) == blk_crc;
+}
+
+/*
+ * For checkpoint manager
+ */
+enum {
+ NAT_BITMAP,
+ SIT_BITMAP
+};
+
+/* for the list of orphan inodes */
+struct orphan_inode_entry {
+ struct list_head list; /* list head */
+ nid_t ino; /* inode number */
+};
+
+/* for the list of directory inodes */
+struct dir_inode_entry {
+ struct list_head list; /* list head */
+ struct inode *inode; /* vfs inode pointer */
+};
+
+/* for the list of fsync inodes, used only during recovery */
+struct fsync_inode_entry {
+ struct list_head list; /* list head */
+ struct inode *inode; /* vfs inode pointer */
+ block_t blkaddr; /* block address locating the last inode */
+};
+
+#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats))
+#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits))
+
+#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne)
+#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid)
+#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se)
+#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno)
+
+static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i)
+{
+ int before = nats_in_cursum(rs);
+ rs->n_nats = cpu_to_le16(before + i);
+ return before;
+}
+
+static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i)
+{
+ int before = sits_in_cursum(rs);
+ rs->n_sits = cpu_to_le16(before + i);
+ return before;
+}
+
+/*
+ * For INODE and NODE manager
+ */
+#define XATTR_NODE_OFFSET (-1) /*
+ * store xattrs to one node block per
+ * file keeping -1 as its node offset to
+ * distinguish from index node blocks.
+ */
+#define RDONLY_NODE 1 /*
+ * specify a read-only mode when getting
+ * a node block. 0 is read-write mode.
+ * used by get_dnode_of_data().
+ */
+#define F2FS_LINK_MAX 32000 /* maximum link count per file */
+
+/* for in-memory extent cache entry */
+struct extent_info {
+ rwlock_t ext_lock; /* rwlock for consistency */
+ unsigned int fofs; /* start offset in a file */
+ u32 blk_addr; /* start block address of the extent */
+ unsigned int len; /* lenth of the extent */
+};
+
+/*
+ * i_advise uses FADVISE_XXX_BIT. We can add additional hints later.
+ */
+#define FADVISE_COLD_BIT 0x01
+
+struct f2fs_inode_info {
+ struct inode vfs_inode; /* serve a vfs inode */
+ unsigned long i_flags; /* keep an inode flags for ioctl */
+ unsigned char i_advise; /* use to give file attribute hints */
+ unsigned int i_current_depth; /* use only in directory structure */
+ unsigned int i_pino; /* parent inode number */
+ umode_t i_acl_mode; /* keep file acl mode temporarily */
+
+ /* Use below internally in f2fs*/
+ unsigned long flags; /* use to pass per-file flags */
+ unsigned long long data_version;/* lastes version of data for fsync */
+ atomic_t dirty_dents; /* # of dirty dentry pages */
+ f2fs_hash_t chash; /* hash value of given file name */
+ unsigned int clevel; /* maximum level of given file name */
+ nid_t i_xattr_nid; /* node id that contains xattrs */
+ struct extent_info ext; /* in-memory extent cache entry */
+};
+
+static inline void get_extent_info(struct extent_info *ext,
+ struct f2fs_extent i_ext)
+{
+ write_lock(&ext->ext_lock);
+ ext->fofs = le32_to_cpu(i_ext.fofs);
+ ext->blk_addr = le32_to_cpu(i_ext.blk_addr);
+ ext->len = le32_to_cpu(i_ext.len);
+ write_unlock(&ext->ext_lock);
+}
+
+static inline void set_raw_extent(struct extent_info *ext,
+ struct f2fs_extent *i_ext)
+{
+ read_lock(&ext->ext_lock);
+ i_ext->fofs = cpu_to_le32(ext->fofs);
+ i_ext->blk_addr = cpu_to_le32(ext->blk_addr);
+ i_ext->len = cpu_to_le32(ext->len);
+ read_unlock(&ext->ext_lock);
+}
+
+struct f2fs_nm_info {
+ block_t nat_blkaddr; /* base disk address of NAT */
+ nid_t max_nid; /* maximum possible node ids */
+ nid_t init_scan_nid; /* the first nid to be scanned */
+ nid_t next_scan_nid; /* the next nid to be scanned */
+
+ /* NAT cache management */
+ struct radix_tree_root nat_root;/* root of the nat entry cache */
+ rwlock_t nat_tree_lock; /* protect nat_tree_lock */
+ unsigned int nat_cnt; /* the # of cached nat entries */
+ struct list_head nat_entries; /* cached nat entry list (clean) */
+ struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */
+
+ /* free node ids management */
+ struct list_head free_nid_list; /* a list for free nids */
+ spinlock_t free_nid_list_lock; /* protect free nid list */
+ unsigned int fcnt; /* the number of free node id */
+ struct mutex build_lock; /* lock for build free nids */
+
+ /* for checkpoint */
+ char *nat_bitmap; /* NAT bitmap pointer */
+ int bitmap_size; /* bitmap size */
+};
+
+/*
+ * this structure is used as one of function parameters.
+ * all the information are dedicated to a given direct node block determined
+ * by the data offset in a file.
+ */
+struct dnode_of_data {
+ struct inode *inode; /* vfs inode pointer */
+ struct page *inode_page; /* its inode page, NULL is possible */
+ struct page *node_page; /* cached direct node page */
+ nid_t nid; /* node id of the direct node block */
+ unsigned int ofs_in_node; /* data offset in the node page */
+ bool inode_page_locked; /* inode page is locked or not */
+ block_t data_blkaddr; /* block address of the node block */
+};
+
+static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
+ struct page *ipage, struct page *npage, nid_t nid)
+{
+ memset(dn, 0, sizeof(*dn));
+ dn->inode = inode;
+ dn->inode_page = ipage;
+ dn->node_page = npage;
+ dn->nid = nid;
+}
+
+/*
+ * For SIT manager
+ *
+ * By default, there are 6 active log areas across the whole main area.
+ * When considering hot and cold data separation to reduce cleaning overhead,
+ * we split 3 for data logs and 3 for node logs as hot, warm, and cold types,
+ * respectively.
+ * In the current design, you should not change the numbers intentionally.
+ * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6
+ * logs individually according to the underlying devices. (default: 6)
+ * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for
+ * data and 8 for node logs.
+ */
+#define NR_CURSEG_DATA_TYPE (3)
+#define NR_CURSEG_NODE_TYPE (3)
+#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
+
+enum {
+ CURSEG_HOT_DATA = 0, /* directory entry blocks */
+ CURSEG_WARM_DATA, /* data blocks */
+ CURSEG_COLD_DATA, /* multimedia or GCed data blocks */
+ CURSEG_HOT_NODE, /* direct node blocks of directory files */
+ CURSEG_WARM_NODE, /* direct node blocks of normal files */
+ CURSEG_COLD_NODE, /* indirect node blocks */
+ NO_CHECK_TYPE
+};
+
+struct f2fs_sm_info {
+ struct sit_info *sit_info; /* whole segment information */
+ struct free_segmap_info *free_info; /* free segment information */
+ struct dirty_seglist_info *dirty_info; /* dirty segment information */
+ struct curseg_info *curseg_array; /* active segment information */
+
+ struct list_head wblist_head; /* list of under-writeback pages */
+ spinlock_t wblist_lock; /* lock for checkpoint */
+
+ block_t seg0_blkaddr; /* block address of 0'th segment */
+ block_t main_blkaddr; /* start block address of main area */
+ block_t ssa_blkaddr; /* start block address of SSA area */
+
+ unsigned int segment_count; /* total # of segments */
+ unsigned int main_segments; /* # of segments in main area */
+ unsigned int reserved_segments; /* # of reserved segments */
+ unsigned int ovp_segments; /* # of overprovision segments */
+};
+
+/*
+ * For directory operation
+ */
+#define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1)
+#define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2)
+#define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3)
+#define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4)
+#define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5)
+
+/*
+ * For superblock
+ */
+/*
+ * COUNT_TYPE for monitoring
+ *
+ * f2fs monitors the number of several block types such as on-writeback,
+ * dirty dentry blocks, dirty node blocks, and dirty meta blocks.
+ */
+enum count_type {
+ F2FS_WRITEBACK,
+ F2FS_DIRTY_DENTS,
+ F2FS_DIRTY_NODES,
+ F2FS_DIRTY_META,
+ NR_COUNT_TYPE,
+};
+
+/*
+ * FS_LOCK nesting subclasses for the lock validator:
+ *
+ * The locking order between these classes is
+ * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW
+ * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC
+ */
+enum lock_type {
+ RENAME, /* for renaming operations */
+ DENTRY_OPS, /* for directory operations */
+ DATA_WRITE, /* for data write */
+ DATA_NEW, /* for data allocation */
+ DATA_TRUNC, /* for data truncate */
+ NODE_NEW, /* for node allocation */
+ NODE_TRUNC, /* for node truncate */
+ NODE_WRITE, /* for node write */
+ NR_LOCK_TYPE,
+};
+
+/*
+ * The below are the page types of bios used in submti_bio().
+ * The available types are:
+ * DATA User data pages. It operates as async mode.
+ * NODE Node pages. It operates as async mode.
+ * META FS metadata pages such as SIT, NAT, CP.
+ * NR_PAGE_TYPE The number of page types.
+ * META_FLUSH Make sure the previous pages are written
+ * with waiting the bio's completion
+ * ... Only can be used with META.
+ */
+enum page_type {
+ DATA,
+ NODE,
+ META,
+ NR_PAGE_TYPE,
+ META_FLUSH,
+};
+
+struct f2fs_sb_info {
+ struct super_block *sb; /* pointer to VFS super block */
+ struct buffer_head *raw_super_buf; /* buffer head of raw sb */
+ struct f2fs_super_block *raw_super; /* raw super block pointer */
+ int s_dirty; /* dirty flag for checkpoint */
+
+ /* for node-related operations */
+ struct f2fs_nm_info *nm_info; /* node manager */
+ struct inode *node_inode; /* cache node blocks */
+
+ /* for segment-related operations */
+ struct f2fs_sm_info *sm_info; /* segment manager */
+ struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */
+ sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */
+ struct rw_semaphore bio_sem; /* IO semaphore */
+
+ /* for checkpoint */
+ struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */
+ struct inode *meta_inode; /* cache meta blocks */
+ struct mutex cp_mutex; /* for checkpoint procedure */
+ struct mutex fs_lock[NR_LOCK_TYPE]; /* for blocking FS operations */
+ struct mutex write_inode; /* mutex for write inode */
+ struct mutex writepages; /* mutex for writepages() */
+ int por_doing; /* recovery is doing or not */
+
+ /* for orphan inode management */
+ struct list_head orphan_inode_list; /* orphan inode list */
+ struct mutex orphan_inode_mutex; /* for orphan inode list */
+ unsigned int n_orphans; /* # of orphan inodes */
+
+ /* for directory inode management */
+ struct list_head dir_inode_list; /* dir inode list */
+ spinlock_t dir_inode_lock; /* for dir inode list lock */
+ unsigned int n_dirty_dirs; /* # of dir inodes */
+
+ /* basic file system units */
+ unsigned int log_sectors_per_block; /* log2 sectors per block */
+ unsigned int log_blocksize; /* log2 block size */
+ unsigned int blocksize; /* block size */
+ unsigned int root_ino_num; /* root inode number*/
+ unsigned int node_ino_num; /* node inode number*/
+ unsigned int meta_ino_num; /* meta inode number*/
+ unsigned int log_blocks_per_seg; /* log2 blocks per segment */
+ unsigned int blocks_per_seg; /* blocks per segment */
+ unsigned int segs_per_sec; /* segments per section */
+ unsigned int secs_per_zone; /* sections per zone */
+ unsigned int total_sections; /* total section count */
+ unsigned int total_node_count; /* total node block count */
+ unsigned int total_valid_node_count; /* valid node block count */
+ unsigned int total_valid_inode_count; /* valid inode count */
+ int active_logs; /* # of active logs */
+
+ block_t user_block_count; /* # of user blocks */
+ block_t total_valid_block_count; /* # of valid blocks */
+ block_t alloc_valid_block_count; /* # of allocated blocks */
+ block_t last_valid_block_count; /* for recovery */
+ u32 s_next_generation; /* for NFS support */
+ atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */
+
+ struct f2fs_mount_info mount_opt; /* mount options */
+
+ /* for cleaning operations */
+ struct mutex gc_mutex; /* mutex for GC */
+ struct f2fs_gc_kthread *gc_thread; /* GC thread */
+
+ /*
+ * for stat information.
+ * one is for the LFS mode, and the other is for the SSR mode.
+ */
+ struct f2fs_stat_info *stat_info; /* FS status information */
+ unsigned int segment_count[2]; /* # of allocated segments */
+ unsigned int block_count[2]; /* # of allocated blocks */
+ unsigned int last_victim[2]; /* last victim segment # */
+ int total_hit_ext, read_hit_ext; /* extent cache hit ratio */
+ int bg_gc; /* background gc calls */
+ spinlock_t stat_lock; /* lock for stat operations */
+};
+
+/*
+ * Inline functions
+ */
+static inline struct f2fs_inode_info *F2FS_I(struct inode *inode)
+{
+ return container_of(inode, struct f2fs_inode_info, vfs_inode);
+}
+
+static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
+{
+ return (struct f2fs_super_block *)(sbi->raw_super);
+}
+
+static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
+{
+ return (struct f2fs_checkpoint *)(sbi->ckpt);
+}
+
+static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi)
+{
+ return (struct f2fs_nm_info *)(sbi->nm_info);
+}
+
+static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi)
+{
+ return (struct f2fs_sm_info *)(sbi->sm_info);
+}
+
+static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi)
+{
+ return (struct sit_info *)(SM_I(sbi)->sit_info);
+}
+
+static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi)
+{
+ return (struct free_segmap_info *)(SM_I(sbi)->free_info);
+}
+
+static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi)
+{
+ return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info);
+}
+
+static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi)
+{
+ sbi->s_dirty = 1;
+}
+
+static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi)
+{
+ sbi->s_dirty = 0;
+}
+
+static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
+{
+ unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
+ return ckpt_flags & f;
+}
+
+static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
+{
+ unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
+ ckpt_flags |= f;
+ cp->ckpt_flags = cpu_to_le32(ckpt_flags);
+}
+
+static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f)
+{
+ unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags);
+ ckpt_flags &= (~f);
+ cp->ckpt_flags = cpu_to_le32(ckpt_flags);
+}
+
+static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t)
+{
+ mutex_lock_nested(&sbi->fs_lock[t], t);
+}
+
+static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t)
+{
+ mutex_unlock(&sbi->fs_lock[t]);
+}
+
+/*
+ * Check whether the given nid is within node id range.
+ */
+static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ BUG_ON((nid >= NM_I(sbi)->max_nid));
+}
+
+#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1
+
+/*
+ * Check whether the inode has blocks or not
+ */
+static inline int F2FS_HAS_BLOCKS(struct inode *inode)
+{
+ if (F2FS_I(inode)->i_xattr_nid)
+ return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1);
+ else
+ return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS);
+}
+
+static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
+ struct inode *inode, blkcnt_t count)
+{
+ block_t valid_block_count;
+
+ spin_lock(&sbi->stat_lock);
+ valid_block_count =
+ sbi->total_valid_block_count + (block_t)count;
+ if (valid_block_count > sbi->user_block_count) {
+ spin_unlock(&sbi->stat_lock);
+ return false;
+ }
+ inode->i_blocks += count;
+ sbi->total_valid_block_count = valid_block_count;
+ sbi->alloc_valid_block_count += (block_t)count;
+ spin_unlock(&sbi->stat_lock);
+ return true;
+}
+
+static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
+ struct inode *inode,
+ blkcnt_t count)
+{
+ spin_lock(&sbi->stat_lock);
+ BUG_ON(sbi->total_valid_block_count < (block_t) count);
+ BUG_ON(inode->i_blocks < count);
+ inode->i_blocks -= count;
+ sbi->total_valid_block_count -= (block_t)count;
+ spin_unlock(&sbi->stat_lock);
+ return 0;
+}
+
+static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
+{
+ atomic_inc(&sbi->nr_pages[count_type]);
+ F2FS_SET_SB_DIRT(sbi);
+}
+
+static inline void inode_inc_dirty_dents(struct inode *inode)
+{
+ atomic_inc(&F2FS_I(inode)->dirty_dents);
+}
+
+static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type)
+{
+ atomic_dec(&sbi->nr_pages[count_type]);
+}
+
+static inline void inode_dec_dirty_dents(struct inode *inode)
+{
+ atomic_dec(&F2FS_I(inode)->dirty_dents);
+}
+
+static inline int get_pages(struct f2fs_sb_info *sbi, int count_type)
+{
+ return atomic_read(&sbi->nr_pages[count_type]);
+}
+
+static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
+{
+ block_t ret;
+ spin_lock(&sbi->stat_lock);
+ ret = sbi->total_valid_block_count;
+ spin_unlock(&sbi->stat_lock);
+ return ret;
+}
+
+static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+
+ /* return NAT or SIT bitmap */
+ if (flag == NAT_BITMAP)
+ return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
+ else if (flag == SIT_BITMAP)
+ return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
+
+ return 0;
+}
+
+static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ int offset = (flag == NAT_BITMAP) ?
+ le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
+ return &ckpt->sit_nat_version_bitmap + offset;
+}
+
+static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
+{
+ block_t start_addr;
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver);
+
+ start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr);
+
+ /*
+ * odd numbered checkpoint should at cp segment 0
+ * and even segent must be at cp segment 1
+ */
+ if (!(ckpt_version & 1))
+ start_addr += sbi->blocks_per_seg;
+
+ return start_addr;
+}
+
+static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
+{
+ return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
+}
+
+static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi,
+ struct inode *inode,
+ unsigned int count)
+{
+ block_t valid_block_count;
+ unsigned int valid_node_count;
+
+ spin_lock(&sbi->stat_lock);
+
+ valid_block_count = sbi->total_valid_block_count + (block_t)count;
+ sbi->alloc_valid_block_count += (block_t)count;
+ valid_node_count = sbi->total_valid_node_count + count;
+
+ if (valid_block_count > sbi->user_block_count) {
+ spin_unlock(&sbi->stat_lock);
+ return false;
+ }
+
+ if (valid_node_count > sbi->total_node_count) {
+ spin_unlock(&sbi->stat_lock);
+ return false;
+ }
+
+ if (inode)
+ inode->i_blocks += count;
+ sbi->total_valid_node_count = valid_node_count;
+ sbi->total_valid_block_count = valid_block_count;
+ spin_unlock(&sbi->stat_lock);
+
+ return true;
+}
+
+static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
+ struct inode *inode,
+ unsigned int count)
+{
+ spin_lock(&sbi->stat_lock);
+
+ BUG_ON(sbi->total_valid_block_count < count);
+ BUG_ON(sbi->total_valid_node_count < count);
+ BUG_ON(inode->i_blocks < count);
+
+ inode->i_blocks -= count;
+ sbi->total_valid_node_count -= count;
+ sbi->total_valid_block_count -= (block_t)count;
+
+ spin_unlock(&sbi->stat_lock);
+}
+
+static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
+{
+ unsigned int ret;
+ spin_lock(&sbi->stat_lock);
+ ret = sbi->total_valid_node_count;
+ spin_unlock(&sbi->stat_lock);
+ return ret;
+}
+
+static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
+{
+ spin_lock(&sbi->stat_lock);
+ BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
+ sbi->total_valid_inode_count++;
+ spin_unlock(&sbi->stat_lock);
+}
+
+static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
+{
+ spin_lock(&sbi->stat_lock);
+ BUG_ON(!sbi->total_valid_inode_count);
+ sbi->total_valid_inode_count--;
+ spin_unlock(&sbi->stat_lock);
+ return 0;
+}
+
+static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi)
+{
+ unsigned int ret;
+ spin_lock(&sbi->stat_lock);
+ ret = sbi->total_valid_inode_count;
+ spin_unlock(&sbi->stat_lock);
+ return ret;
+}
+
+static inline void f2fs_put_page(struct page *page, int unlock)
+{
+ if (!page || IS_ERR(page))
+ return;
+
+ if (unlock) {
+ BUG_ON(!PageLocked(page));
+ unlock_page(page);
+ }
+ page_cache_release(page);
+}
+
+static inline void f2fs_put_dnode(struct dnode_of_data *dn)
+{
+ if (dn->node_page)
+ f2fs_put_page(dn->node_page, 1);
+ if (dn->inode_page && dn->node_page != dn->inode_page)
+ f2fs_put_page(dn->inode_page, 0);
+ dn->node_page = NULL;
+ dn->inode_page = NULL;
+}
+
+static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name,
+ size_t size, void (*ctor)(void *))
+{
+ return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor);
+}
+
+#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino)
+
+static inline bool IS_INODE(struct page *page)
+{
+ struct f2fs_node *p = (struct f2fs_node *)page_address(page);
+ return RAW_IS_INODE(p);
+}
+
+static inline __le32 *blkaddr_in_node(struct f2fs_node *node)
+{
+ return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr;
+}
+
+static inline block_t datablock_addr(struct page *node_page,
+ unsigned int offset)
+{
+ struct f2fs_node *raw_node;
+ __le32 *addr_array;
+ raw_node = (struct f2fs_node *)page_address(node_page);
+ addr_array = blkaddr_in_node(raw_node);
+ return le32_to_cpu(addr_array[offset]);
+}
+
+static inline int f2fs_test_bit(unsigned int nr, char *addr)
+{
+ int mask;
+
+ addr += (nr >> 3);
+ mask = 1 << (7 - (nr & 0x07));
+ return mask & *addr;
+}
+
+static inline int f2fs_set_bit(unsigned int nr, char *addr)
+{
+ int mask;
+ int ret;
+
+ addr += (nr >> 3);
+ mask = 1 << (7 - (nr & 0x07));
+ ret = mask & *addr;
+ *addr |= mask;
+ return ret;
+}
+
+static inline int f2fs_clear_bit(unsigned int nr, char *addr)
+{
+ int mask;
+ int ret;
+
+ addr += (nr >> 3);
+ mask = 1 << (7 - (nr & 0x07));
+ ret = mask & *addr;
+ *addr &= ~mask;
+ return ret;
+}
+
+/* used for f2fs_inode_info->flags */
+enum {
+ FI_NEW_INODE, /* indicate newly allocated inode */
+ FI_NEED_CP, /* need to do checkpoint during fsync */
+ FI_INC_LINK, /* need to increment i_nlink */
+ FI_ACL_MODE, /* indicate acl mode */
+ FI_NO_ALLOC, /* should not allocate any blocks */
+};
+
+static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)
+{
+ set_bit(flag, &fi->flags);
+}
+
+static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag)
+{
+ return test_bit(flag, &fi->flags);
+}
+
+static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag)
+{
+ clear_bit(flag, &fi->flags);
+}
+
+static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode)
+{
+ fi->i_acl_mode = mode;
+ set_inode_flag(fi, FI_ACL_MODE);
+}
+
+static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag)
+{
+ if (is_inode_flag_set(fi, FI_ACL_MODE)) {
+ clear_inode_flag(fi, FI_ACL_MODE);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * file.c
+ */
+int f2fs_sync_file(struct file *, loff_t, loff_t, int);
+void truncate_data_blocks(struct dnode_of_data *);
+void f2fs_truncate(struct inode *);
+int f2fs_setattr(struct dentry *, struct iattr *);
+int truncate_hole(struct inode *, pgoff_t, pgoff_t);
+long f2fs_ioctl(struct file *, unsigned int, unsigned long);
+
+/*
+ * inode.c
+ */
+void f2fs_set_inode_flags(struct inode *);
+struct inode *f2fs_iget_nowait(struct super_block *, unsigned long);
+struct inode *f2fs_iget(struct super_block *, unsigned long);
+void update_inode(struct inode *, struct page *);
+int f2fs_write_inode(struct inode *, struct writeback_control *);
+void f2fs_evict_inode(struct inode *);
+
+/*
+ * namei.c
+ */
+struct dentry *f2fs_get_parent(struct dentry *child);
+
+/*
+ * dir.c
+ */
+struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
+ struct page **);
+struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **);
+ino_t f2fs_inode_by_name(struct inode *, struct qstr *);
+void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
+ struct page *, struct inode *);
+void init_dent_inode(struct dentry *, struct page *);
+int f2fs_add_link(struct dentry *, struct inode *);
+void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
+int f2fs_make_empty(struct inode *, struct inode *);
+bool f2fs_empty_dir(struct inode *);
+
+/*
+ * super.c
+ */
+int f2fs_sync_fs(struct super_block *, int);
+extern __printf(3, 4)
+void f2fs_msg(struct super_block *, const char *, const char *, ...);
+
+/*
+ * hash.c
+ */
+f2fs_hash_t f2fs_dentry_hash(const char *, size_t);
+
+/*
+ * node.c
+ */
+struct dnode_of_data;
+struct node_info;
+
+int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
+void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
+int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
+int truncate_inode_blocks(struct inode *, pgoff_t);
+int remove_inode_page(struct inode *);
+int new_inode_page(struct inode *, struct dentry *);
+struct page *new_node_page(struct dnode_of_data *, unsigned int);
+void ra_node_page(struct f2fs_sb_info *, nid_t);
+struct page *get_node_page(struct f2fs_sb_info *, pgoff_t);
+struct page *get_node_page_ra(struct page *, int);
+void sync_inode_page(struct dnode_of_data *);
+int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *);
+bool alloc_nid(struct f2fs_sb_info *, nid_t *);
+void alloc_nid_done(struct f2fs_sb_info *, nid_t);
+void alloc_nid_failed(struct f2fs_sb_info *, nid_t);
+void recover_node_page(struct f2fs_sb_info *, struct page *,
+ struct f2fs_summary *, struct node_info *, block_t);
+int recover_inode_page(struct f2fs_sb_info *, struct page *);
+int restore_node_summary(struct f2fs_sb_info *, unsigned int,
+ struct f2fs_summary_block *);
+void flush_nat_entries(struct f2fs_sb_info *);
+int build_node_manager(struct f2fs_sb_info *);
+void destroy_node_manager(struct f2fs_sb_info *);
+int __init create_node_manager_caches(void);
+void destroy_node_manager_caches(void);
+
+/*
+ * segment.c
+ */
+void f2fs_balance_fs(struct f2fs_sb_info *);
+void invalidate_blocks(struct f2fs_sb_info *, block_t);
+void locate_dirty_segment(struct f2fs_sb_info *, unsigned int);
+void clear_prefree_segments(struct f2fs_sb_info *);
+int npages_for_summary_flush(struct f2fs_sb_info *);
+void allocate_new_segments(struct f2fs_sb_info *);
+struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
+struct bio *f2fs_bio_alloc(struct block_device *, int);
+void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync);
+int write_meta_page(struct f2fs_sb_info *, struct page *,
+ struct writeback_control *);
+void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int,
+ block_t, block_t *);
+void write_data_page(struct inode *, struct page *, struct dnode_of_data*,
+ block_t, block_t *);
+void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t);
+void recover_data_page(struct f2fs_sb_info *, struct page *,
+ struct f2fs_summary *, block_t, block_t);
+void rewrite_node_page(struct f2fs_sb_info *, struct page *,
+ struct f2fs_summary *, block_t, block_t);
+void write_data_summaries(struct f2fs_sb_info *, block_t);
+void write_node_summaries(struct f2fs_sb_info *, block_t);
+int lookup_journal_in_cursum(struct f2fs_summary_block *,
+ int, unsigned int, int);
+void flush_sit_entries(struct f2fs_sb_info *);
+int build_segment_manager(struct f2fs_sb_info *);
+void reset_victim_segmap(struct f2fs_sb_info *);
+void destroy_segment_manager(struct f2fs_sb_info *);
+
+/*
+ * checkpoint.c
+ */
+struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
+struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
+long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
+int check_orphan_space(struct f2fs_sb_info *);
+void add_orphan_inode(struct f2fs_sb_info *, nid_t);
+void remove_orphan_inode(struct f2fs_sb_info *, nid_t);
+int recover_orphan_inodes(struct f2fs_sb_info *);
+int get_valid_checkpoint(struct f2fs_sb_info *);
+void set_dirty_dir_page(struct inode *, struct page *);
+void remove_dirty_dir_inode(struct inode *);
+void sync_dirty_dir_inodes(struct f2fs_sb_info *);
+void block_operations(struct f2fs_sb_info *);
+void write_checkpoint(struct f2fs_sb_info *, bool, bool);
+void init_orphan_info(struct f2fs_sb_info *);
+int __init create_checkpoint_caches(void);
+void destroy_checkpoint_caches(void);
+
+/*
+ * data.c
+ */
+int reserve_new_block(struct dnode_of_data *);
+void update_extent_cache(block_t, struct dnode_of_data *);
+struct page *find_data_page(struct inode *, pgoff_t);
+struct page *get_lock_data_page(struct inode *, pgoff_t);
+struct page *get_new_data_page(struct inode *, pgoff_t, bool);
+int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int);
+int do_write_data_page(struct page *);
+
+/*
+ * gc.c
+ */
+int start_gc_thread(struct f2fs_sb_info *);
+void stop_gc_thread(struct f2fs_sb_info *);
+block_t start_bidx_of_node(unsigned int);
+int f2fs_gc(struct f2fs_sb_info *);
+void build_gc_manager(struct f2fs_sb_info *);
+int __init create_gc_caches(void);
+void destroy_gc_caches(void);
+
+/*
+ * recovery.c
+ */
+void recover_fsync_data(struct f2fs_sb_info *);
+bool space_for_roll_forward(struct f2fs_sb_info *);
+
+/*
+ * debug.c
+ */
+#ifdef CONFIG_F2FS_STAT_FS
+struct f2fs_stat_info {
+ struct list_head stat_list;
+ struct f2fs_sb_info *sbi;
+ struct mutex stat_lock;
+ int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
+ int main_area_segs, main_area_sections, main_area_zones;
+ int hit_ext, total_ext;
+ int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
+ int nats, sits, fnids;
+ int total_count, utilization;
+ int bg_gc;
+ unsigned int valid_count, valid_node_count, valid_inode_count;
+ unsigned int bimodal, avg_vblocks;
+ int util_free, util_valid, util_invalid;
+ int rsvd_segs, overp_segs;
+ int dirty_count, node_pages, meta_pages;
+ int prefree_count, call_count;
+ int tot_segs, node_segs, data_segs, free_segs, free_secs;
+ int tot_blks, data_blks, node_blks;
+ int curseg[NR_CURSEG_TYPE];
+ int cursec[NR_CURSEG_TYPE];
+ int curzone[NR_CURSEG_TYPE];
+
+ unsigned int segment_count[2];
+ unsigned int block_count[2];
+ unsigned base_mem, cache_mem;
+};
+
+#define stat_inc_call_count(si) ((si)->call_count++)
+
+#define stat_inc_seg_count(sbi, type) \
+ do { \
+ struct f2fs_stat_info *si = sbi->stat_info; \
+ (si)->tot_segs++; \
+ if (type == SUM_TYPE_DATA) \
+ si->data_segs++; \
+ else \
+ si->node_segs++; \
+ } while (0)
+
+#define stat_inc_tot_blk_count(si, blks) \
+ (si->tot_blks += (blks))
+
+#define stat_inc_data_blk_count(sbi, blks) \
+ do { \
+ struct f2fs_stat_info *si = sbi->stat_info; \
+ stat_inc_tot_blk_count(si, blks); \
+ si->data_blks += (blks); \
+ } while (0)
+
+#define stat_inc_node_blk_count(sbi, blks) \
+ do { \
+ struct f2fs_stat_info *si = sbi->stat_info; \
+ stat_inc_tot_blk_count(si, blks); \
+ si->node_blks += (blks); \
+ } while (0)
+
+int f2fs_build_stats(struct f2fs_sb_info *);
+void f2fs_destroy_stats(struct f2fs_sb_info *);
+void __init f2fs_create_root_stats(void);
+void f2fs_destroy_root_stats(void);
+#else
+#define stat_inc_call_count(si)
+#define stat_inc_seg_count(si, type)
+#define stat_inc_tot_blk_count(si, blks)
+#define stat_inc_data_blk_count(si, blks)
+#define stat_inc_node_blk_count(sbi, blks)
+
+static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
+static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
+static inline void __init f2fs_create_root_stats(void) { }
+static inline void f2fs_destroy_root_stats(void) { }
+#endif
+
+extern const struct file_operations f2fs_dir_operations;
+extern const struct file_operations f2fs_file_operations;
+extern const struct inode_operations f2fs_file_inode_operations;
+extern const struct address_space_operations f2fs_dblock_aops;
+extern const struct address_space_operations f2fs_node_aops;
+extern const struct address_space_operations f2fs_meta_aops;
+extern const struct inode_operations f2fs_dir_inode_operations;
+extern const struct inode_operations f2fs_symlink_inode_operations;
+extern const struct inode_operations f2fs_special_inode_operations;
+#endif
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
new file mode 100644
index 000000000000..3191b52aafb0
--- /dev/null
+++ b/fs/f2fs/file.c
@@ -0,0 +1,646 @@
+/*
+ * fs/f2fs/file.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/stat.h>
+#include <linux/buffer_head.h>
+#include <linux/writeback.h>
+#include <linux/falloc.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/mount.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+#include "xattr.h"
+#include "acl.h"
+
+static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
+ struct vm_fault *vmf)
+{
+ struct page *page = vmf->page;
+ struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ block_t old_blk_addr;
+ struct dnode_of_data dn;
+ int err;
+
+ f2fs_balance_fs(sbi);
+
+ sb_start_pagefault(inode->i_sb);
+
+ mutex_lock_op(sbi, DATA_NEW);
+
+ /* block allocation */
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, page->index, 0);
+ if (err) {
+ mutex_unlock_op(sbi, DATA_NEW);
+ goto out;
+ }
+
+ old_blk_addr = dn.data_blkaddr;
+
+ if (old_blk_addr == NULL_ADDR) {
+ err = reserve_new_block(&dn);
+ if (err) {
+ f2fs_put_dnode(&dn);
+ mutex_unlock_op(sbi, DATA_NEW);
+ goto out;
+ }
+ }
+ f2fs_put_dnode(&dn);
+
+ mutex_unlock_op(sbi, DATA_NEW);
+
+ lock_page(page);
+ if (page->mapping != inode->i_mapping ||
+ page_offset(page) >= i_size_read(inode) ||
+ !PageUptodate(page)) {
+ unlock_page(page);
+ err = -EFAULT;
+ goto out;
+ }
+
+ /*
+ * check to see if the page is mapped already (no holes)
+ */
+ if (PageMappedToDisk(page))
+ goto out;
+
+ /* fill the page */
+ wait_on_page_writeback(page);
+
+ /* page is wholly or partially inside EOF */
+ if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
+ unsigned offset;
+ offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
+ zero_user_segment(page, offset, PAGE_CACHE_SIZE);
+ }
+ set_page_dirty(page);
+ SetPageUptodate(page);
+
+ file_update_time(vma->vm_file);
+out:
+ sb_end_pagefault(inode->i_sb);
+ return block_page_mkwrite_return(err);
+}
+
+static const struct vm_operations_struct f2fs_file_vm_ops = {
+ .fault = filemap_fault,
+ .page_mkwrite = f2fs_vm_page_mkwrite,
+ .remap_pages = generic_file_remap_pages,
+};
+
+static int need_to_sync_dir(struct f2fs_sb_info *sbi, struct inode *inode)
+{
+ struct dentry *dentry;
+ nid_t pino;
+
+ inode = igrab(inode);
+ dentry = d_find_any_alias(inode);
+ if (!dentry) {
+ iput(inode);
+ return 0;
+ }
+ pino = dentry->d_parent->d_inode->i_ino;
+ dput(dentry);
+ iput(inode);
+ return !is_checkpointed_node(sbi, pino);
+}
+
+int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ unsigned long long cur_version;
+ int ret = 0;
+ bool need_cp = false;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .for_reclaim = 0,
+ };
+
+ if (inode->i_sb->s_flags & MS_RDONLY)
+ return 0;
+
+ ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ if (ret)
+ return ret;
+
+ /* guarantee free sections for fsync */
+ f2fs_balance_fs(sbi);
+
+ mutex_lock(&inode->i_mutex);
+
+ if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+ goto out;
+
+ mutex_lock(&sbi->cp_mutex);
+ cur_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver);
+ mutex_unlock(&sbi->cp_mutex);
+
+ if (F2FS_I(inode)->data_version != cur_version &&
+ !(inode->i_state & I_DIRTY))
+ goto out;
+ F2FS_I(inode)->data_version--;
+
+ if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
+ need_cp = true;
+ if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP))
+ need_cp = true;
+ if (!space_for_roll_forward(sbi))
+ need_cp = true;
+ if (need_to_sync_dir(sbi, inode))
+ need_cp = true;
+
+ if (need_cp) {
+ /* all the dirty node pages should be flushed for POR */
+ ret = f2fs_sync_fs(inode->i_sb, 1);
+ clear_inode_flag(F2FS_I(inode), FI_NEED_CP);
+ } else {
+ /* if there is no written node page, write its inode page */
+ while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
+ ret = f2fs_write_inode(inode, NULL);
+ if (ret)
+ goto out;
+ }
+ filemap_fdatawait_range(sbi->node_inode->i_mapping,
+ 0, LONG_MAX);
+ }
+out:
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+}
+
+static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ file_accessed(file);
+ vma->vm_ops = &f2fs_file_vm_ops;
+ return 0;
+}
+
+static int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
+{
+ int nr_free = 0, ofs = dn->ofs_in_node;
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct f2fs_node *raw_node;
+ __le32 *addr;
+
+ raw_node = page_address(dn->node_page);
+ addr = blkaddr_in_node(raw_node) + ofs;
+
+ for ( ; count > 0; count--, addr++, dn->ofs_in_node++) {
+ block_t blkaddr = le32_to_cpu(*addr);
+ if (blkaddr == NULL_ADDR)
+ continue;
+
+ update_extent_cache(NULL_ADDR, dn);
+ invalidate_blocks(sbi, blkaddr);
+ dec_valid_block_count(sbi, dn->inode, 1);
+ nr_free++;
+ }
+ if (nr_free) {
+ set_page_dirty(dn->node_page);
+ sync_inode_page(dn);
+ }
+ dn->ofs_in_node = ofs;
+ return nr_free;
+}
+
+void truncate_data_blocks(struct dnode_of_data *dn)
+{
+ truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
+}
+
+static void truncate_partial_data_page(struct inode *inode, u64 from)
+{
+ unsigned offset = from & (PAGE_CACHE_SIZE - 1);
+ struct page *page;
+
+ if (!offset)
+ return;
+
+ page = find_data_page(inode, from >> PAGE_CACHE_SHIFT);
+ if (IS_ERR(page))
+ return;
+
+ lock_page(page);
+ wait_on_page_writeback(page);
+ zero_user(page, offset, PAGE_CACHE_SIZE - offset);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+}
+
+static int truncate_blocks(struct inode *inode, u64 from)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ unsigned int blocksize = inode->i_sb->s_blocksize;
+ struct dnode_of_data dn;
+ pgoff_t free_from;
+ int count = 0;
+ int err;
+
+ free_from = (pgoff_t)
+ ((from + blocksize - 1) >> (sbi->log_blocksize));
+
+ mutex_lock_op(sbi, DATA_TRUNC);
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, free_from, RDONLY_NODE);
+ if (err) {
+ if (err == -ENOENT)
+ goto free_next;
+ mutex_unlock_op(sbi, DATA_TRUNC);
+ return err;
+ }
+
+ if (IS_INODE(dn.node_page))
+ count = ADDRS_PER_INODE;
+ else
+ count = ADDRS_PER_BLOCK;
+
+ count -= dn.ofs_in_node;
+ BUG_ON(count < 0);
+ if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
+ truncate_data_blocks_range(&dn, count);
+ free_from += count;
+ }
+
+ f2fs_put_dnode(&dn);
+free_next:
+ err = truncate_inode_blocks(inode, free_from);
+ mutex_unlock_op(sbi, DATA_TRUNC);
+
+ /* lastly zero out the first data page */
+ truncate_partial_data_page(inode, from);
+
+ return err;
+}
+
+void f2fs_truncate(struct inode *inode)
+{
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
+ return;
+
+ if (!truncate_blocks(inode, i_size_read(inode))) {
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
+ }
+
+ f2fs_balance_fs(F2FS_SB(inode->i_sb));
+}
+
+static int f2fs_getattr(struct vfsmount *mnt,
+ struct dentry *dentry, struct kstat *stat)
+{
+ struct inode *inode = dentry->d_inode;
+ generic_fillattr(inode, stat);
+ stat->blocks <<= 3;
+ return 0;
+}
+
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+static void __setattr_copy(struct inode *inode, const struct iattr *attr)
+{
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ unsigned int ia_valid = attr->ia_valid;
+
+ if (ia_valid & ATTR_UID)
+ inode->i_uid = attr->ia_uid;
+ if (ia_valid & ATTR_GID)
+ inode->i_gid = attr->ia_gid;
+ if (ia_valid & ATTR_ATIME)
+ inode->i_atime = timespec_trunc(attr->ia_atime,
+ inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_MTIME)
+ inode->i_mtime = timespec_trunc(attr->ia_mtime,
+ inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_CTIME)
+ inode->i_ctime = timespec_trunc(attr->ia_ctime,
+ inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_MODE) {
+ umode_t mode = attr->ia_mode;
+
+ if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
+ mode &= ~S_ISGID;
+ set_acl_inode(fi, mode);
+ }
+}
+#else
+#define __setattr_copy setattr_copy
+#endif
+
+int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ int err;
+
+ err = inode_change_ok(inode, attr);
+ if (err)
+ return err;
+
+ if ((attr->ia_valid & ATTR_SIZE) &&
+ attr->ia_size != i_size_read(inode)) {
+ truncate_setsize(inode, attr->ia_size);
+ f2fs_truncate(inode);
+ }
+
+ __setattr_copy(inode, attr);
+
+ if (attr->ia_valid & ATTR_MODE) {
+ err = f2fs_acl_chmod(inode);
+ if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
+ inode->i_mode = fi->i_acl_mode;
+ clear_inode_flag(fi, FI_ACL_MODE);
+ }
+ }
+
+ mark_inode_dirty(inode);
+ return err;
+}
+
+const struct inode_operations f2fs_file_inode_operations = {
+ .getattr = f2fs_getattr,
+ .setattr = f2fs_setattr,
+ .get_acl = f2fs_get_acl,
+#ifdef CONFIG_F2FS_FS_XATTR
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};
+
+static void fill_zero(struct inode *inode, pgoff_t index,
+ loff_t start, loff_t len)
+{
+ struct page *page;
+
+ if (!len)
+ return;
+
+ page = get_new_data_page(inode, index, false);
+
+ if (!IS_ERR(page)) {
+ wait_on_page_writeback(page);
+ zero_user(page, start, len);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+ }
+}
+
+int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
+{
+ pgoff_t index;
+ int err;
+
+ for (index = pg_start; index < pg_end; index++) {
+ struct dnode_of_data dn;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+
+ f2fs_balance_fs(sbi);
+
+ mutex_lock_op(sbi, DATA_TRUNC);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ err = get_dnode_of_data(&dn, index, RDONLY_NODE);
+ if (err) {
+ mutex_unlock_op(sbi, DATA_TRUNC);
+ if (err == -ENOENT)
+ continue;
+ return err;
+ }
+
+ if (dn.data_blkaddr != NULL_ADDR)
+ truncate_data_blocks_range(&dn, 1);
+ f2fs_put_dnode(&dn);
+ mutex_unlock_op(sbi, DATA_TRUNC);
+ }
+ return 0;
+}
+
+static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode)
+{
+ pgoff_t pg_start, pg_end;
+ loff_t off_start, off_end;
+ int ret = 0;
+
+ pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
+ pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
+
+ off_start = offset & (PAGE_CACHE_SIZE - 1);
+ off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
+
+ if (pg_start == pg_end) {
+ fill_zero(inode, pg_start, off_start,
+ off_end - off_start);
+ } else {
+ if (off_start)
+ fill_zero(inode, pg_start++, off_start,
+ PAGE_CACHE_SIZE - off_start);
+ if (off_end)
+ fill_zero(inode, pg_end, 0, off_end);
+
+ if (pg_start < pg_end) {
+ struct address_space *mapping = inode->i_mapping;
+ loff_t blk_start, blk_end;
+
+ blk_start = pg_start << PAGE_CACHE_SHIFT;
+ blk_end = pg_end << PAGE_CACHE_SHIFT;
+ truncate_inode_pages_range(mapping, blk_start,
+ blk_end - 1);
+ ret = truncate_hole(inode, pg_start, pg_end);
+ }
+ }
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+ i_size_read(inode) <= (offset + len)) {
+ i_size_write(inode, offset);
+ mark_inode_dirty(inode);
+ }
+
+ return ret;
+}
+
+static int expand_inode_data(struct inode *inode, loff_t offset,
+ loff_t len, int mode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ pgoff_t index, pg_start, pg_end;
+ loff_t new_size = i_size_read(inode);
+ loff_t off_start, off_end;
+ int ret = 0;
+
+ ret = inode_newsize_ok(inode, (len + offset));
+ if (ret)
+ return ret;
+
+ pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
+ pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
+
+ off_start = offset & (PAGE_CACHE_SIZE - 1);
+ off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
+
+ for (index = pg_start; index <= pg_end; index++) {
+ struct dnode_of_data dn;
+
+ mutex_lock_op(sbi, DATA_NEW);
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ ret = get_dnode_of_data(&dn, index, 0);
+ if (ret) {
+ mutex_unlock_op(sbi, DATA_NEW);
+ break;
+ }
+
+ if (dn.data_blkaddr == NULL_ADDR) {
+ ret = reserve_new_block(&dn);
+ if (ret) {
+ f2fs_put_dnode(&dn);
+ mutex_unlock_op(sbi, DATA_NEW);
+ break;
+ }
+ }
+ f2fs_put_dnode(&dn);
+
+ mutex_unlock_op(sbi, DATA_NEW);
+
+ if (pg_start == pg_end)
+ new_size = offset + len;
+ else if (index == pg_start && off_start)
+ new_size = (index + 1) << PAGE_CACHE_SHIFT;
+ else if (index == pg_end)
+ new_size = (index << PAGE_CACHE_SHIFT) + off_end;
+ else
+ new_size += PAGE_CACHE_SIZE;
+ }
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+ i_size_read(inode) < new_size) {
+ i_size_write(inode, new_size);
+ mark_inode_dirty(inode);
+ }
+
+ return ret;
+}
+
+static long f2fs_fallocate(struct file *file, int mode,
+ loff_t offset, loff_t len)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ long ret;
+
+ if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+ return -EOPNOTSUPP;
+
+ if (mode & FALLOC_FL_PUNCH_HOLE)
+ ret = punch_hole(inode, offset, len, mode);
+ else
+ ret = expand_inode_data(inode, offset, len, mode);
+
+ if (!ret) {
+ inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
+ }
+ return ret;
+}
+
+#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
+#define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
+
+static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
+{
+ if (S_ISDIR(mode))
+ return flags;
+ else if (S_ISREG(mode))
+ return flags & F2FS_REG_FLMASK;
+ else
+ return flags & F2FS_OTHER_FLMASK;
+}
+
+long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ unsigned int flags;
+ int ret;
+
+ switch (cmd) {
+ case FS_IOC_GETFLAGS:
+ flags = fi->i_flags & FS_FL_USER_VISIBLE;
+ return put_user(flags, (int __user *) arg);
+ case FS_IOC_SETFLAGS:
+ {
+ unsigned int oldflags;
+
+ ret = mnt_want_write(filp->f_path.mnt);
+ if (ret)
+ return ret;
+
+ if (!inode_owner_or_capable(inode)) {
+ ret = -EACCES;
+ goto out;
+ }
+
+ if (get_user(flags, (int __user *) arg)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ flags = f2fs_mask_flags(inode->i_mode, flags);
+
+ mutex_lock(&inode->i_mutex);
+
+ oldflags = fi->i_flags;
+
+ if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
+ if (!capable(CAP_LINUX_IMMUTABLE)) {
+ mutex_unlock(&inode->i_mutex);
+ ret = -EPERM;
+ goto out;
+ }
+ }
+
+ flags = flags & FS_FL_USER_MODIFIABLE;
+ flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
+ fi->i_flags = flags;
+ mutex_unlock(&inode->i_mutex);
+
+ f2fs_set_inode_flags(inode);
+ inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(inode);
+out:
+ mnt_drop_write(filp->f_path.mnt);
+ return ret;
+ }
+ default:
+ return -ENOTTY;
+ }
+}
+
+const struct file_operations f2fs_file_operations = {
+ .llseek = generic_file_llseek,
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .open = generic_file_open,
+ .mmap = f2fs_file_mmap,
+ .fsync = f2fs_sync_file,
+ .fallocate = f2fs_fallocate,
+ .unlocked_ioctl = f2fs_ioctl,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+};
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
new file mode 100644
index 000000000000..c386910dacc5
--- /dev/null
+++ b/fs/f2fs/gc.c
@@ -0,0 +1,716 @@
+/*
+ * fs/f2fs/gc.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/backing-dev.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/f2fs_fs.h>
+#include <linux/kthread.h>
+#include <linux/delay.h>
+#include <linux/freezer.h>
+#include <linux/blkdev.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+#include "gc.h"
+
+static struct kmem_cache *winode_slab;
+
+static int gc_thread_func(void *data)
+{
+ struct f2fs_sb_info *sbi = data;
+ wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head;
+ long wait_ms;
+
+ wait_ms = GC_THREAD_MIN_SLEEP_TIME;
+
+ do {
+ if (try_to_freeze())
+ continue;
+ else
+ wait_event_interruptible_timeout(*wq,
+ kthread_should_stop(),
+ msecs_to_jiffies(wait_ms));
+ if (kthread_should_stop())
+ break;
+
+ f2fs_balance_fs(sbi);
+
+ if (!test_opt(sbi, BG_GC))
+ continue;
+
+ /*
+ * [GC triggering condition]
+ * 0. GC is not conducted currently.
+ * 1. There are enough dirty segments.
+ * 2. IO subsystem is idle by checking the # of writeback pages.
+ * 3. IO subsystem is idle by checking the # of requests in
+ * bdev's request list.
+ *
+ * Note) We have to avoid triggering GCs too much frequently.
+ * Because it is possible that some segments can be
+ * invalidated soon after by user update or deletion.
+ * So, I'd like to wait some time to collect dirty segments.
+ */
+ if (!mutex_trylock(&sbi->gc_mutex))
+ continue;
+
+ if (!is_idle(sbi)) {
+ wait_ms = increase_sleep_time(wait_ms);
+ mutex_unlock(&sbi->gc_mutex);
+ continue;
+ }
+
+ if (has_enough_invalid_blocks(sbi))
+ wait_ms = decrease_sleep_time(wait_ms);
+ else
+ wait_ms = increase_sleep_time(wait_ms);
+
+ sbi->bg_gc++;
+
+ if (f2fs_gc(sbi) == GC_NONE)
+ wait_ms = GC_THREAD_NOGC_SLEEP_TIME;
+ else if (wait_ms == GC_THREAD_NOGC_SLEEP_TIME)
+ wait_ms = GC_THREAD_MAX_SLEEP_TIME;
+
+ } while (!kthread_should_stop());
+ return 0;
+}
+
+int start_gc_thread(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_gc_kthread *gc_th;
+
+ gc_th = kmalloc(sizeof(struct f2fs_gc_kthread), GFP_KERNEL);
+ if (!gc_th)
+ return -ENOMEM;
+
+ sbi->gc_thread = gc_th;
+ init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head);
+ sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi,
+ GC_THREAD_NAME);
+ if (IS_ERR(gc_th->f2fs_gc_task)) {
+ kfree(gc_th);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void stop_gc_thread(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_gc_kthread *gc_th = sbi->gc_thread;
+ if (!gc_th)
+ return;
+ kthread_stop(gc_th->f2fs_gc_task);
+ kfree(gc_th);
+ sbi->gc_thread = NULL;
+}
+
+static int select_gc_type(int gc_type)
+{
+ return (gc_type == BG_GC) ? GC_CB : GC_GREEDY;
+}
+
+static void select_policy(struct f2fs_sb_info *sbi, int gc_type,
+ int type, struct victim_sel_policy *p)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+
+ if (p->alloc_mode) {
+ p->gc_mode = GC_GREEDY;
+ p->dirty_segmap = dirty_i->dirty_segmap[type];
+ p->ofs_unit = 1;
+ } else {
+ p->gc_mode = select_gc_type(gc_type);
+ p->dirty_segmap = dirty_i->dirty_segmap[DIRTY];
+ p->ofs_unit = sbi->segs_per_sec;
+ }
+ p->offset = sbi->last_victim[p->gc_mode];
+}
+
+static unsigned int get_max_cost(struct f2fs_sb_info *sbi,
+ struct victim_sel_policy *p)
+{
+ if (p->gc_mode == GC_GREEDY)
+ return (1 << sbi->log_blocks_per_seg) * p->ofs_unit;
+ else if (p->gc_mode == GC_CB)
+ return UINT_MAX;
+ else /* No other gc_mode */
+ return 0;
+}
+
+static unsigned int check_bg_victims(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned int segno;
+
+ /*
+ * If the gc_type is FG_GC, we can select victim segments
+ * selected by background GC before.
+ * Those segments guarantee they have small valid blocks.
+ */
+ segno = find_next_bit(dirty_i->victim_segmap[BG_GC],
+ TOTAL_SEGS(sbi), 0);
+ if (segno < TOTAL_SEGS(sbi)) {
+ clear_bit(segno, dirty_i->victim_segmap[BG_GC]);
+ return segno;
+ }
+ return NULL_SEGNO;
+}
+
+static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int secno = GET_SECNO(sbi, segno);
+ unsigned int start = secno * sbi->segs_per_sec;
+ unsigned long long mtime = 0;
+ unsigned int vblocks;
+ unsigned char age = 0;
+ unsigned char u;
+ unsigned int i;
+
+ for (i = 0; i < sbi->segs_per_sec; i++)
+ mtime += get_seg_entry(sbi, start + i)->mtime;
+ vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec);
+
+ mtime = div_u64(mtime, sbi->segs_per_sec);
+ vblocks = div_u64(vblocks, sbi->segs_per_sec);
+
+ u = (vblocks * 100) >> sbi->log_blocks_per_seg;
+
+ /* Handle if the system time is changed by user */
+ if (mtime < sit_i->min_mtime)
+ sit_i->min_mtime = mtime;
+ if (mtime > sit_i->max_mtime)
+ sit_i->max_mtime = mtime;
+ if (sit_i->max_mtime != sit_i->min_mtime)
+ age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime),
+ sit_i->max_mtime - sit_i->min_mtime);
+
+ return UINT_MAX - ((100 * (100 - u) * age) / (100 + u));
+}
+
+static unsigned int get_gc_cost(struct f2fs_sb_info *sbi, unsigned int segno,
+ struct victim_sel_policy *p)
+{
+ if (p->alloc_mode == SSR)
+ return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
+
+ /* alloc_mode == LFS */
+ if (p->gc_mode == GC_GREEDY)
+ return get_valid_blocks(sbi, segno, sbi->segs_per_sec);
+ else
+ return get_cb_cost(sbi, segno);
+}
+
+/*
+ * This function is called from two pathes.
+ * One is garbage collection and the other is SSR segment selection.
+ * When it is called during GC, it just gets a victim segment
+ * and it does not remove it from dirty seglist.
+ * When it is called from SSR segment selection, it finds a segment
+ * which has minimum valid blocks and removes it from dirty seglist.
+ */
+static int get_victim_by_default(struct f2fs_sb_info *sbi,
+ unsigned int *result, int gc_type, int type, char alloc_mode)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ struct victim_sel_policy p;
+ unsigned int segno;
+ int nsearched = 0;
+
+ p.alloc_mode = alloc_mode;
+ select_policy(sbi, gc_type, type, &p);
+
+ p.min_segno = NULL_SEGNO;
+ p.min_cost = get_max_cost(sbi, &p);
+
+ mutex_lock(&dirty_i->seglist_lock);
+
+ if (p.alloc_mode == LFS && gc_type == FG_GC) {
+ p.min_segno = check_bg_victims(sbi);
+ if (p.min_segno != NULL_SEGNO)
+ goto got_it;
+ }
+
+ while (1) {
+ unsigned long cost;
+
+ segno = find_next_bit(p.dirty_segmap,
+ TOTAL_SEGS(sbi), p.offset);
+ if (segno >= TOTAL_SEGS(sbi)) {
+ if (sbi->last_victim[p.gc_mode]) {
+ sbi->last_victim[p.gc_mode] = 0;
+ p.offset = 0;
+ continue;
+ }
+ break;
+ }
+ p.offset = ((segno / p.ofs_unit) * p.ofs_unit) + p.ofs_unit;
+
+ if (test_bit(segno, dirty_i->victim_segmap[FG_GC]))
+ continue;
+ if (gc_type == BG_GC &&
+ test_bit(segno, dirty_i->victim_segmap[BG_GC]))
+ continue;
+ if (IS_CURSEC(sbi, GET_SECNO(sbi, segno)))
+ continue;
+
+ cost = get_gc_cost(sbi, segno, &p);
+
+ if (p.min_cost > cost) {
+ p.min_segno = segno;
+ p.min_cost = cost;
+ }
+
+ if (cost == get_max_cost(sbi, &p))
+ continue;
+
+ if (nsearched++ >= MAX_VICTIM_SEARCH) {
+ sbi->last_victim[p.gc_mode] = segno;
+ break;
+ }
+ }
+got_it:
+ if (p.min_segno != NULL_SEGNO) {
+ *result = (p.min_segno / p.ofs_unit) * p.ofs_unit;
+ if (p.alloc_mode == LFS) {
+ int i;
+ for (i = 0; i < p.ofs_unit; i++)
+ set_bit(*result + i,
+ dirty_i->victim_segmap[gc_type]);
+ }
+ }
+ mutex_unlock(&dirty_i->seglist_lock);
+
+ return (p.min_segno == NULL_SEGNO) ? 0 : 1;
+}
+
+static const struct victim_selection default_v_ops = {
+ .get_victim = get_victim_by_default,
+};
+
+static struct inode *find_gc_inode(nid_t ino, struct list_head *ilist)
+{
+ struct list_head *this;
+ struct inode_entry *ie;
+
+ list_for_each(this, ilist) {
+ ie = list_entry(this, struct inode_entry, list);
+ if (ie->inode->i_ino == ino)
+ return ie->inode;
+ }
+ return NULL;
+}
+
+static void add_gc_inode(struct inode *inode, struct list_head *ilist)
+{
+ struct list_head *this;
+ struct inode_entry *new_ie, *ie;
+
+ list_for_each(this, ilist) {
+ ie = list_entry(this, struct inode_entry, list);
+ if (ie->inode == inode) {
+ iput(inode);
+ return;
+ }
+ }
+repeat:
+ new_ie = kmem_cache_alloc(winode_slab, GFP_NOFS);
+ if (!new_ie) {
+ cond_resched();
+ goto repeat;
+ }
+ new_ie->inode = inode;
+ list_add_tail(&new_ie->list, ilist);
+}
+
+static void put_gc_inode(struct list_head *ilist)
+{
+ struct inode_entry *ie, *next_ie;
+ list_for_each_entry_safe(ie, next_ie, ilist, list) {
+ iput(ie->inode);
+ list_del(&ie->list);
+ kmem_cache_free(winode_slab, ie);
+ }
+}
+
+static int check_valid_map(struct f2fs_sb_info *sbi,
+ unsigned int segno, int offset)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct seg_entry *sentry;
+ int ret;
+
+ mutex_lock(&sit_i->sentry_lock);
+ sentry = get_seg_entry(sbi, segno);
+ ret = f2fs_test_bit(offset, sentry->cur_valid_map);
+ mutex_unlock(&sit_i->sentry_lock);
+ return ret ? GC_OK : GC_NEXT;
+}
+
+/*
+ * This function compares node address got in summary with that in NAT.
+ * On validity, copy that node with cold status, otherwise (invalid node)
+ * ignore that.
+ */
+static int gc_node_segment(struct f2fs_sb_info *sbi,
+ struct f2fs_summary *sum, unsigned int segno, int gc_type)
+{
+ bool initial = true;
+ struct f2fs_summary *entry;
+ int off;
+
+next_step:
+ entry = sum;
+ for (off = 0; off < sbi->blocks_per_seg; off++, entry++) {
+ nid_t nid = le32_to_cpu(entry->nid);
+ struct page *node_page;
+ int err;
+
+ /*
+ * It makes sure that free segments are able to write
+ * all the dirty node pages before CP after this CP.
+ * So let's check the space of dirty node pages.
+ */
+ if (should_do_checkpoint(sbi)) {
+ mutex_lock(&sbi->cp_mutex);
+ block_operations(sbi);
+ return GC_BLOCKED;
+ }
+
+ err = check_valid_map(sbi, segno, off);
+ if (err == GC_NEXT)
+ continue;
+
+ if (initial) {
+ ra_node_page(sbi, nid);
+ continue;
+ }
+ node_page = get_node_page(sbi, nid);
+ if (IS_ERR(node_page))
+ continue;
+
+ /* set page dirty and write it */
+ if (!PageWriteback(node_page))
+ set_page_dirty(node_page);
+ f2fs_put_page(node_page, 1);
+ stat_inc_node_blk_count(sbi, 1);
+ }
+ if (initial) {
+ initial = false;
+ goto next_step;
+ }
+
+ if (gc_type == FG_GC) {
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .for_reclaim = 0,
+ };
+ sync_node_pages(sbi, 0, &wbc);
+ }
+ return GC_DONE;
+}
+
+/*
+ * Calculate start block index indicating the given node offset.
+ * Be careful, caller should give this node offset only indicating direct node
+ * blocks. If any node offsets, which point the other types of node blocks such
+ * as indirect or double indirect node blocks, are given, it must be a caller's
+ * bug.
+ */
+block_t start_bidx_of_node(unsigned int node_ofs)
+{
+ unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4;
+ unsigned int bidx;
+
+ if (node_ofs == 0)
+ return 0;
+
+ if (node_ofs <= 2) {
+ bidx = node_ofs - 1;
+ } else if (node_ofs <= indirect_blks) {
+ int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1);
+ bidx = node_ofs - 2 - dec;
+ } else {
+ int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
+ bidx = node_ofs - 5 - dec;
+ }
+ return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE;
+}
+
+static int check_dnode(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
+ struct node_info *dni, block_t blkaddr, unsigned int *nofs)
+{
+ struct page *node_page;
+ nid_t nid;
+ unsigned int ofs_in_node;
+ block_t source_blkaddr;
+
+ nid = le32_to_cpu(sum->nid);
+ ofs_in_node = le16_to_cpu(sum->ofs_in_node);
+
+ node_page = get_node_page(sbi, nid);
+ if (IS_ERR(node_page))
+ return GC_NEXT;
+
+ get_node_info(sbi, nid, dni);
+
+ if (sum->version != dni->version) {
+ f2fs_put_page(node_page, 1);
+ return GC_NEXT;
+ }
+
+ *nofs = ofs_of_node(node_page);
+ source_blkaddr = datablock_addr(node_page, ofs_in_node);
+ f2fs_put_page(node_page, 1);
+
+ if (source_blkaddr != blkaddr)
+ return GC_NEXT;
+ return GC_OK;
+}
+
+static void move_data_page(struct inode *inode, struct page *page, int gc_type)
+{
+ if (page->mapping != inode->i_mapping)
+ goto out;
+
+ if (inode != page->mapping->host)
+ goto out;
+
+ if (PageWriteback(page))
+ goto out;
+
+ if (gc_type == BG_GC) {
+ set_page_dirty(page);
+ set_cold_data(page);
+ } else {
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ mutex_lock_op(sbi, DATA_WRITE);
+ if (clear_page_dirty_for_io(page) &&
+ S_ISDIR(inode->i_mode)) {
+ dec_page_count(sbi, F2FS_DIRTY_DENTS);
+ inode_dec_dirty_dents(inode);
+ }
+ set_cold_data(page);
+ do_write_data_page(page);
+ mutex_unlock_op(sbi, DATA_WRITE);
+ clear_cold_data(page);
+ }
+out:
+ f2fs_put_page(page, 1);
+}
+
+/*
+ * This function tries to get parent node of victim data block, and identifies
+ * data block validity. If the block is valid, copy that with cold status and
+ * modify parent node.
+ * If the parent node is not valid or the data block address is different,
+ * the victim data block is ignored.
+ */
+static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
+ struct list_head *ilist, unsigned int segno, int gc_type)
+{
+ struct super_block *sb = sbi->sb;
+ struct f2fs_summary *entry;
+ block_t start_addr;
+ int err, off;
+ int phase = 0;
+
+ start_addr = START_BLOCK(sbi, segno);
+
+next_step:
+ entry = sum;
+ for (off = 0; off < sbi->blocks_per_seg; off++, entry++) {
+ struct page *data_page;
+ struct inode *inode;
+ struct node_info dni; /* dnode info for the data */
+ unsigned int ofs_in_node, nofs;
+ block_t start_bidx;
+
+ /*
+ * It makes sure that free segments are able to write
+ * all the dirty node pages before CP after this CP.
+ * So let's check the space of dirty node pages.
+ */
+ if (should_do_checkpoint(sbi)) {
+ mutex_lock(&sbi->cp_mutex);
+ block_operations(sbi);
+ err = GC_BLOCKED;
+ goto stop;
+ }
+
+ err = check_valid_map(sbi, segno, off);
+ if (err == GC_NEXT)
+ continue;
+
+ if (phase == 0) {
+ ra_node_page(sbi, le32_to_cpu(entry->nid));
+ continue;
+ }
+
+ /* Get an inode by ino with checking validity */
+ err = check_dnode(sbi, entry, &dni, start_addr + off, &nofs);
+ if (err == GC_NEXT)
+ continue;
+
+ if (phase == 1) {
+ ra_node_page(sbi, dni.ino);
+ continue;
+ }
+
+ start_bidx = start_bidx_of_node(nofs);
+ ofs_in_node = le16_to_cpu(entry->ofs_in_node);
+
+ if (phase == 2) {
+ inode = f2fs_iget_nowait(sb, dni.ino);
+ if (IS_ERR(inode))
+ continue;
+
+ data_page = find_data_page(inode,
+ start_bidx + ofs_in_node);
+ if (IS_ERR(data_page))
+ goto next_iput;
+
+ f2fs_put_page(data_page, 0);
+ add_gc_inode(inode, ilist);
+ } else {
+ inode = find_gc_inode(dni.ino, ilist);
+ if (inode) {
+ data_page = get_lock_data_page(inode,
+ start_bidx + ofs_in_node);
+ if (IS_ERR(data_page))
+ continue;
+ move_data_page(inode, data_page, gc_type);
+ stat_inc_data_blk_count(sbi, 1);
+ }
+ }
+ continue;
+next_iput:
+ iput(inode);
+ }
+ if (++phase < 4)
+ goto next_step;
+ err = GC_DONE;
+stop:
+ if (gc_type == FG_GC)
+ f2fs_submit_bio(sbi, DATA, true);
+ return err;
+}
+
+static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim,
+ int gc_type, int type)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ int ret;
+ mutex_lock(&sit_i->sentry_lock);
+ ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type, type, LFS);
+ mutex_unlock(&sit_i->sentry_lock);
+ return ret;
+}
+
+static int do_garbage_collect(struct f2fs_sb_info *sbi, unsigned int segno,
+ struct list_head *ilist, int gc_type)
+{
+ struct page *sum_page;
+ struct f2fs_summary_block *sum;
+ int ret = GC_DONE;
+
+ /* read segment summary of victim */
+ sum_page = get_sum_page(sbi, segno);
+ if (IS_ERR(sum_page))
+ return GC_ERROR;
+
+ /*
+ * CP needs to lock sum_page. In this time, we don't need
+ * to lock this page, because this summary page is not gone anywhere.
+ * Also, this page is not gonna be updated before GC is done.
+ */
+ unlock_page(sum_page);
+ sum = page_address(sum_page);
+
+ switch (GET_SUM_TYPE((&sum->footer))) {
+ case SUM_TYPE_NODE:
+ ret = gc_node_segment(sbi, sum->entries, segno, gc_type);
+ break;
+ case SUM_TYPE_DATA:
+ ret = gc_data_segment(sbi, sum->entries, ilist, segno, gc_type);
+ break;
+ }
+ stat_inc_seg_count(sbi, GET_SUM_TYPE((&sum->footer)));
+ stat_inc_call_count(sbi->stat_info);
+
+ f2fs_put_page(sum_page, 0);
+ return ret;
+}
+
+int f2fs_gc(struct f2fs_sb_info *sbi)
+{
+ struct list_head ilist;
+ unsigned int segno, i;
+ int gc_type = BG_GC;
+ int gc_status = GC_NONE;
+
+ INIT_LIST_HEAD(&ilist);
+gc_more:
+ if (!(sbi->sb->s_flags & MS_ACTIVE))
+ goto stop;
+
+ if (has_not_enough_free_secs(sbi))
+ gc_type = FG_GC;
+
+ if (!__get_victim(sbi, &segno, gc_type, NO_CHECK_TYPE))
+ goto stop;
+
+ for (i = 0; i < sbi->segs_per_sec; i++) {
+ /*
+ * do_garbage_collect will give us three gc_status:
+ * GC_ERROR, GC_DONE, and GC_BLOCKED.
+ * If GC is finished uncleanly, we have to return
+ * the victim to dirty segment list.
+ */
+ gc_status = do_garbage_collect(sbi, segno + i, &ilist, gc_type);
+ if (gc_status != GC_DONE)
+ break;
+ }
+ if (has_not_enough_free_secs(sbi)) {
+ write_checkpoint(sbi, (gc_status == GC_BLOCKED), false);
+ if (has_not_enough_free_secs(sbi))
+ goto gc_more;
+ }
+stop:
+ mutex_unlock(&sbi->gc_mutex);
+
+ put_gc_inode(&ilist);
+ return gc_status;
+}
+
+void build_gc_manager(struct f2fs_sb_info *sbi)
+{
+ DIRTY_I(sbi)->v_ops = &default_v_ops;
+}
+
+int __init create_gc_caches(void)
+{
+ winode_slab = f2fs_kmem_cache_create("f2fs_gc_inodes",
+ sizeof(struct inode_entry), NULL);
+ if (!winode_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+void destroy_gc_caches(void)
+{
+ kmem_cache_destroy(winode_slab);
+}
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
new file mode 100644
index 000000000000..b026d9354ccd
--- /dev/null
+++ b/fs/f2fs/gc.h
@@ -0,0 +1,117 @@
+/*
+ * fs/f2fs/gc.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define GC_THREAD_NAME "f2fs_gc_task"
+#define GC_THREAD_MIN_WB_PAGES 1 /*
+ * a threshold to determine
+ * whether IO subsystem is idle
+ * or not
+ */
+#define GC_THREAD_MIN_SLEEP_TIME 10000 /* milliseconds */
+#define GC_THREAD_MAX_SLEEP_TIME 30000
+#define GC_THREAD_NOGC_SLEEP_TIME 10000
+#define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */
+#define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */
+
+/* Search max. number of dirty segments to select a victim segment */
+#define MAX_VICTIM_SEARCH 20
+
+enum {
+ GC_NONE = 0,
+ GC_ERROR,
+ GC_OK,
+ GC_NEXT,
+ GC_BLOCKED,
+ GC_DONE,
+};
+
+struct f2fs_gc_kthread {
+ struct task_struct *f2fs_gc_task;
+ wait_queue_head_t gc_wait_queue_head;
+};
+
+struct inode_entry {
+ struct list_head list;
+ struct inode *inode;
+};
+
+/*
+ * inline functions
+ */
+static inline block_t free_user_blocks(struct f2fs_sb_info *sbi)
+{
+ if (free_segments(sbi) < overprovision_segments(sbi))
+ return 0;
+ else
+ return (free_segments(sbi) - overprovision_segments(sbi))
+ << sbi->log_blocks_per_seg;
+}
+
+static inline block_t limit_invalid_user_blocks(struct f2fs_sb_info *sbi)
+{
+ return (long)(sbi->user_block_count * LIMIT_INVALID_BLOCK) / 100;
+}
+
+static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi)
+{
+ block_t reclaimable_user_blocks = sbi->user_block_count -
+ written_block_count(sbi);
+ return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100;
+}
+
+static inline long increase_sleep_time(long wait)
+{
+ wait += GC_THREAD_MIN_SLEEP_TIME;
+ if (wait > GC_THREAD_MAX_SLEEP_TIME)
+ wait = GC_THREAD_MAX_SLEEP_TIME;
+ return wait;
+}
+
+static inline long decrease_sleep_time(long wait)
+{
+ wait -= GC_THREAD_MIN_SLEEP_TIME;
+ if (wait <= GC_THREAD_MIN_SLEEP_TIME)
+ wait = GC_THREAD_MIN_SLEEP_TIME;
+ return wait;
+}
+
+static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi)
+{
+ block_t invalid_user_blocks = sbi->user_block_count -
+ written_block_count(sbi);
+ /*
+ * Background GC is triggered with the following condition.
+ * 1. There are a number of invalid blocks.
+ * 2. There is not enough free space.
+ */
+ if (invalid_user_blocks > limit_invalid_user_blocks(sbi) &&
+ free_user_blocks(sbi) < limit_free_user_blocks(sbi))
+ return true;
+ return false;
+}
+
+static inline int is_idle(struct f2fs_sb_info *sbi)
+{
+ struct block_device *bdev = sbi->sb->s_bdev;
+ struct request_queue *q = bdev_get_queue(bdev);
+ struct request_list *rl = &q->root_rl;
+ return !(rl->count[BLK_RW_SYNC]) && !(rl->count[BLK_RW_ASYNC]);
+}
+
+static inline bool should_do_checkpoint(struct f2fs_sb_info *sbi)
+{
+ unsigned int pages_per_sec = sbi->segs_per_sec *
+ (1 << sbi->log_blocks_per_seg);
+ int node_secs = ((get_pages(sbi, F2FS_DIRTY_NODES) + pages_per_sec - 1)
+ >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
+ int dent_secs = ((get_pages(sbi, F2FS_DIRTY_DENTS) + pages_per_sec - 1)
+ >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
+ return free_sections(sbi) <= (node_secs + 2 * dent_secs + 2);
+}
diff --git a/fs/f2fs/hash.c b/fs/f2fs/hash.c
new file mode 100644
index 000000000000..6eb8d269b53b
--- /dev/null
+++ b/fs/f2fs/hash.c
@@ -0,0 +1,101 @@
+/*
+ * fs/f2fs/hash.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Portions of this code from linux/fs/ext3/hash.c
+ *
+ * Copyright (C) 2002 by Theodore Ts'o
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/cryptohash.h>
+#include <linux/pagemap.h>
+
+#include "f2fs.h"
+
+/*
+ * Hashing code copied from ext3
+ */
+#define DELTA 0x9E3779B9
+
+static void TEA_transform(unsigned int buf[4], unsigned int const in[])
+{
+ __u32 sum = 0;
+ __u32 b0 = buf[0], b1 = buf[1];
+ __u32 a = in[0], b = in[1], c = in[2], d = in[3];
+ int n = 16;
+
+ do {
+ sum += DELTA;
+ b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b);
+ b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d);
+ } while (--n);
+
+ buf[0] += b0;
+ buf[1] += b1;
+}
+
+static void str2hashbuf(const char *msg, size_t len, unsigned int *buf, int num)
+{
+ unsigned pad, val;
+ int i;
+
+ pad = (__u32)len | ((__u32)len << 8);
+ pad |= pad << 16;
+
+ val = pad;
+ if (len > num * 4)
+ len = num * 4;
+ for (i = 0; i < len; i++) {
+ if ((i % 4) == 0)
+ val = pad;
+ val = msg[i] + (val << 8);
+ if ((i % 4) == 3) {
+ *buf++ = val;
+ val = pad;
+ num--;
+ }
+ }
+ if (--num >= 0)
+ *buf++ = val;
+ while (--num >= 0)
+ *buf++ = pad;
+}
+
+f2fs_hash_t f2fs_dentry_hash(const char *name, size_t len)
+{
+ __u32 hash;
+ f2fs_hash_t f2fs_hash;
+ const char *p;
+ __u32 in[8], buf[4];
+
+ if ((len <= 2) && (name[0] == '.') &&
+ (name[1] == '.' || name[1] == '\0'))
+ return 0;
+
+ /* Initialize the default seed for the hash checksum functions */
+ buf[0] = 0x67452301;
+ buf[1] = 0xefcdab89;
+ buf[2] = 0x98badcfe;
+ buf[3] = 0x10325476;
+
+ p = name;
+ while (1) {
+ str2hashbuf(p, len, in, 4);
+ TEA_transform(buf, in);
+ p += 16;
+ if (len <= 16)
+ break;
+ len -= 16;
+ }
+ hash = buf[0];
+ f2fs_hash = cpu_to_le32(hash & ~F2FS_HASH_COL_BIT);
+ return f2fs_hash;
+}
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
new file mode 100644
index 000000000000..794241777322
--- /dev/null
+++ b/fs/f2fs/inode.c
@@ -0,0 +1,272 @@
+/*
+ * fs/f2fs/inode.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/writeback.h>
+
+#include "f2fs.h"
+#include "node.h"
+
+struct f2fs_iget_args {
+ u64 ino;
+ int on_free;
+};
+
+void f2fs_set_inode_flags(struct inode *inode)
+{
+ unsigned int flags = F2FS_I(inode)->i_flags;
+
+ inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
+ S_NOATIME | S_DIRSYNC);
+
+ if (flags & FS_SYNC_FL)
+ inode->i_flags |= S_SYNC;
+ if (flags & FS_APPEND_FL)
+ inode->i_flags |= S_APPEND;
+ if (flags & FS_IMMUTABLE_FL)
+ inode->i_flags |= S_IMMUTABLE;
+ if (flags & FS_NOATIME_FL)
+ inode->i_flags |= S_NOATIME;
+ if (flags & FS_DIRSYNC_FL)
+ inode->i_flags |= S_DIRSYNC;
+}
+
+static int f2fs_iget_test(struct inode *inode, void *data)
+{
+ struct f2fs_iget_args *args = data;
+
+ if (inode->i_ino != args->ino)
+ return 0;
+ if (inode->i_state & (I_FREEING | I_WILL_FREE)) {
+ args->on_free = 1;
+ return 0;
+ }
+ return 1;
+}
+
+struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino)
+{
+ struct f2fs_iget_args args = {
+ .ino = ino,
+ .on_free = 0
+ };
+ struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args);
+
+ if (inode)
+ return inode;
+ if (!args.on_free)
+ return f2fs_iget(sb, ino);
+ return ERR_PTR(-ENOENT);
+}
+
+static int do_read_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct page *node_page;
+ struct f2fs_node *rn;
+ struct f2fs_inode *ri;
+
+ /* Check if ino is within scope */
+ check_nid_range(sbi, inode->i_ino);
+
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page))
+ return PTR_ERR(node_page);
+
+ rn = page_address(node_page);
+ ri = &(rn->i);
+
+ inode->i_mode = le16_to_cpu(ri->i_mode);
+ i_uid_write(inode, le32_to_cpu(ri->i_uid));
+ i_gid_write(inode, le32_to_cpu(ri->i_gid));
+ set_nlink(inode, le32_to_cpu(ri->i_links));
+ inode->i_size = le64_to_cpu(ri->i_size);
+ inode->i_blocks = le64_to_cpu(ri->i_blocks);
+
+ inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
+ inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
+ inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
+ inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
+ inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
+ inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
+ inode->i_generation = le32_to_cpu(ri->i_generation);
+
+ fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
+ fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
+ fi->i_flags = le32_to_cpu(ri->i_flags);
+ fi->flags = 0;
+ fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
+ fi->i_advise = ri->i_advise;
+ fi->i_pino = le32_to_cpu(ri->i_pino);
+ get_extent_info(&fi->ext, ri->i_ext);
+ f2fs_put_page(node_page, 1);
+ return 0;
+}
+
+struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode;
+ int ret;
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+ if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
+ goto make_now;
+
+ ret = do_read_inode(inode);
+ if (ret)
+ goto bad_inode;
+
+ if (!sbi->por_doing && inode->i_nlink == 0) {
+ ret = -ENOENT;
+ goto bad_inode;
+ }
+
+make_now:
+ if (ino == F2FS_NODE_INO(sbi)) {
+ inode->i_mapping->a_ops = &f2fs_node_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
+ } else if (ino == F2FS_META_INO(sbi)) {
+ inode->i_mapping->a_ops = &f2fs_meta_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
+ } else if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &f2fs_file_inode_operations;
+ inode->i_fop = &f2fs_file_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &f2fs_dir_inode_operations;
+ inode->i_fop = &f2fs_dir_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE |
+ __GFP_ZERO);
+ } else if (S_ISLNK(inode->i_mode)) {
+ inode->i_op = &f2fs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
+ S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
+ inode->i_op = &f2fs_special_inode_operations;
+ init_special_inode(inode, inode->i_mode, inode->i_rdev);
+ } else {
+ ret = -EIO;
+ goto bad_inode;
+ }
+ unlock_new_inode(inode);
+
+ return inode;
+
+bad_inode:
+ iget_failed(inode);
+ return ERR_PTR(ret);
+}
+
+void update_inode(struct inode *inode, struct page *node_page)
+{
+ struct f2fs_node *rn;
+ struct f2fs_inode *ri;
+
+ wait_on_page_writeback(node_page);
+
+ rn = page_address(node_page);
+ ri = &(rn->i);
+
+ ri->i_mode = cpu_to_le16(inode->i_mode);
+ ri->i_advise = F2FS_I(inode)->i_advise;
+ ri->i_uid = cpu_to_le32(i_uid_read(inode));
+ ri->i_gid = cpu_to_le32(i_gid_read(inode));
+ ri->i_links = cpu_to_le32(inode->i_nlink);
+ ri->i_size = cpu_to_le64(i_size_read(inode));
+ ri->i_blocks = cpu_to_le64(inode->i_blocks);
+ set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
+
+ ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
+ ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
+ ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
+ ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+ ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
+ ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
+ ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
+ ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
+ ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
+ ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
+ ri->i_generation = cpu_to_le32(inode->i_generation);
+ set_cold_node(inode, node_page);
+ set_page_dirty(node_page);
+}
+
+int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct page *node_page;
+ bool need_lock = false;
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi) ||
+ inode->i_ino == F2FS_META_INO(sbi))
+ return 0;
+
+ if (wbc)
+ f2fs_balance_fs(sbi);
+
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page))
+ return PTR_ERR(node_page);
+
+ if (!PageDirty(node_page)) {
+ need_lock = true;
+ f2fs_put_page(node_page, 1);
+ mutex_lock(&sbi->write_inode);
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page)) {
+ mutex_unlock(&sbi->write_inode);
+ return PTR_ERR(node_page);
+ }
+ }
+ update_inode(inode, node_page);
+ f2fs_put_page(node_page, 1);
+ if (need_lock)
+ mutex_unlock(&sbi->write_inode);
+ return 0;
+}
+
+/*
+ * Called at the last iput() if i_nlink is zero
+ */
+void f2fs_evict_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+
+ truncate_inode_pages(&inode->i_data, 0);
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi) ||
+ inode->i_ino == F2FS_META_INO(sbi))
+ goto no_delete;
+
+ BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
+ remove_dirty_dir_inode(inode);
+
+ if (inode->i_nlink || is_bad_inode(inode))
+ goto no_delete;
+
+ set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
+ i_size_write(inode, 0);
+
+ if (F2FS_HAS_BLOCKS(inode))
+ f2fs_truncate(inode);
+
+ remove_inode_page(inode);
+no_delete:
+ clear_inode(inode);
+}
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
new file mode 100644
index 000000000000..1a49b881bac0
--- /dev/null
+++ b/fs/f2fs/namei.c
@@ -0,0 +1,503 @@
+/*
+ * fs/f2fs/namei.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/pagemap.h>
+#include <linux/sched.h>
+#include <linux/ctype.h>
+
+#include "f2fs.h"
+#include "xattr.h"
+#include "acl.h"
+
+static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
+{
+ struct super_block *sb = dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ nid_t ino;
+ struct inode *inode;
+ bool nid_free = false;
+ int err;
+
+ inode = new_inode(sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_lock_op(sbi, NODE_NEW);
+ if (!alloc_nid(sbi, &ino)) {
+ mutex_unlock_op(sbi, NODE_NEW);
+ err = -ENOSPC;
+ goto fail;
+ }
+ mutex_unlock_op(sbi, NODE_NEW);
+
+ inode->i_uid = current_fsuid();
+
+ if (dir->i_mode & S_ISGID) {
+ inode->i_gid = dir->i_gid;
+ if (S_ISDIR(mode))
+ mode |= S_ISGID;
+ } else {
+ inode->i_gid = current_fsgid();
+ }
+
+ inode->i_ino = ino;
+ inode->i_mode = mode;
+ inode->i_blocks = 0;
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+ inode->i_generation = sbi->s_next_generation++;
+
+ err = insert_inode_locked(inode);
+ if (err) {
+ err = -EINVAL;
+ nid_free = true;
+ goto out;
+ }
+
+ mark_inode_dirty(inode);
+ return inode;
+
+out:
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+fail:
+ iput(inode);
+ if (nid_free)
+ alloc_nid_failed(sbi, ino);
+ return ERR_PTR(err);
+}
+
+static int is_multimedia_file(const unsigned char *s, const char *sub)
+{
+ size_t slen = strlen(s);
+ size_t sublen = strlen(sub);
+ int ret;
+
+ if (sublen > slen)
+ return 1;
+
+ ret = memcmp(s + slen - sublen, sub, sublen);
+ if (ret) { /* compare upper case */
+ int i;
+ char upper_sub[8];
+ for (i = 0; i < sublen && i < sizeof(upper_sub); i++)
+ upper_sub[i] = toupper(sub[i]);
+ return memcmp(s + slen - sublen, upper_sub, sublen);
+ }
+
+ return ret;
+}
+
+/*
+ * Set multimedia files as cold files for hot/cold data separation
+ */
+static inline void set_cold_file(struct f2fs_sb_info *sbi, struct inode *inode,
+ const unsigned char *name)
+{
+ int i;
+ __u8 (*extlist)[8] = sbi->raw_super->extension_list;
+
+ int count = le32_to_cpu(sbi->raw_super->extension_count);
+ for (i = 0; i < count; i++) {
+ if (!is_multimedia_file(name, extlist[i])) {
+ F2FS_I(inode)->i_advise |= FADVISE_COLD_BIT;
+ break;
+ }
+ }
+}
+
+static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+{
+ struct super_block *sb = dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode;
+ nid_t ino = 0;
+ int err;
+
+ f2fs_balance_fs(sbi);
+
+ inode = f2fs_new_inode(dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
+ set_cold_file(sbi, inode, dentry->d_name.name);
+
+ inode->i_op = &f2fs_file_inode_operations;
+ inode->i_fop = &f2fs_file_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ ino = inode->i_ino;
+
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out;
+
+ alloc_nid_done(sbi, ino);
+
+ if (!sbi->por_doing)
+ d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+out:
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ alloc_nid_failed(sbi, ino);
+ return err;
+}
+
+static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct inode *inode = old_dentry->d_inode;
+ struct super_block *sb = dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ int err;
+
+ f2fs_balance_fs(sbi);
+
+ inode->i_ctime = CURRENT_TIME;
+ atomic_inc(&inode->i_count);
+
+ set_inode_flag(F2FS_I(inode), FI_INC_LINK);
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out;
+
+ d_instantiate(dentry, inode);
+ return 0;
+out:
+ clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
+ iput(inode);
+ return err;
+}
+
+struct dentry *f2fs_get_parent(struct dentry *child)
+{
+ struct qstr dotdot = QSTR_INIT("..", 2);
+ unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
+ if (!ino)
+ return ERR_PTR(-ENOENT);
+ return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
+}
+
+static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+{
+ struct inode *inode = NULL;
+ struct f2fs_dir_entry *de;
+ struct page *page;
+
+ if (dentry->d_name.len > F2FS_MAX_NAME_LEN)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ de = f2fs_find_entry(dir, &dentry->d_name, &page);
+ if (de) {
+ nid_t ino = le32_to_cpu(de->ino);
+ kunmap(page);
+ f2fs_put_page(page, 0);
+
+ inode = f2fs_iget(dir->i_sb, ino);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+ }
+
+ return d_splice_alias(inode, dentry);
+}
+
+static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct super_block *sb = dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode = dentry->d_inode;
+ struct f2fs_dir_entry *de;
+ struct page *page;
+ int err = -ENOENT;
+
+ f2fs_balance_fs(sbi);
+
+ de = f2fs_find_entry(dir, &dentry->d_name, &page);
+ if (!de)
+ goto fail;
+
+ err = check_orphan_space(sbi);
+ if (err) {
+ kunmap(page);
+ f2fs_put_page(page, 0);
+ goto fail;
+ }
+
+ f2fs_delete_entry(de, page, inode);
+
+ /* In order to evict this inode, we set it dirty */
+ mark_inode_dirty(inode);
+fail:
+ return err;
+}
+
+static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ struct super_block *sb = dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode;
+ size_t symlen = strlen(symname) + 1;
+ int err;
+
+ f2fs_balance_fs(sbi);
+
+ inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &f2fs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out;
+
+ err = page_symlink(inode, symname, symlen);
+ alloc_nid_done(sbi, inode->i_ino);
+
+ d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
+ return err;
+out:
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ alloc_nid_failed(sbi, inode->i_ino);
+ return err;
+}
+
+static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+ struct inode *inode;
+ int err;
+
+ f2fs_balance_fs(sbi);
+
+ inode = f2fs_new_inode(dir, S_IFDIR | mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &f2fs_dir_inode_operations;
+ inode->i_fop = &f2fs_dir_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
+
+ set_inode_flag(F2FS_I(inode), FI_INC_LINK);
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out_fail;
+
+ alloc_nid_done(sbi, inode->i_ino);
+
+ d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
+
+ return 0;
+
+out_fail:
+ clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ alloc_nid_failed(sbi, inode->i_ino);
+ return err;
+}
+
+static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ if (f2fs_empty_dir(inode))
+ return f2fs_unlink(dir, dentry);
+ return -ENOTEMPTY;
+}
+
+static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
+ umode_t mode, dev_t rdev)
+{
+ struct super_block *sb = dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode;
+ int err = 0;
+
+ if (!new_valid_dev(rdev))
+ return -EINVAL;
+
+ f2fs_balance_fs(sbi);
+
+ inode = f2fs_new_inode(dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ init_special_inode(inode, inode->i_mode, rdev);
+ inode->i_op = &f2fs_special_inode_operations;
+
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out;
+
+ alloc_nid_done(sbi, inode->i_ino);
+ d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+out:
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ alloc_nid_failed(sbi, inode->i_ino);
+ return err;
+}
+
+static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct super_block *sb = old_dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *old_inode = old_dentry->d_inode;
+ struct inode *new_inode = new_dentry->d_inode;
+ struct page *old_dir_page;
+ struct page *old_page;
+ struct f2fs_dir_entry *old_dir_entry = NULL;
+ struct f2fs_dir_entry *old_entry;
+ struct f2fs_dir_entry *new_entry;
+ int err = -ENOENT;
+
+ f2fs_balance_fs(sbi);
+
+ old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+ if (!old_entry)
+ goto out;
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ err = -EIO;
+ old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
+ if (!old_dir_entry)
+ goto out_old;
+ }
+
+ mutex_lock_op(sbi, RENAME);
+
+ if (new_inode) {
+ struct page *new_page;
+
+ err = -ENOTEMPTY;
+ if (old_dir_entry && !f2fs_empty_dir(new_inode))
+ goto out_dir;
+
+ err = -ENOENT;
+ new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
+ &new_page);
+ if (!new_entry)
+ goto out_dir;
+
+ f2fs_set_link(new_dir, new_entry, new_page, old_inode);
+
+ new_inode->i_ctime = CURRENT_TIME;
+ if (old_dir_entry)
+ drop_nlink(new_inode);
+ drop_nlink(new_inode);
+ if (!new_inode->i_nlink)
+ add_orphan_inode(sbi, new_inode->i_ino);
+ f2fs_write_inode(new_inode, NULL);
+ } else {
+ err = f2fs_add_link(new_dentry, old_inode);
+ if (err)
+ goto out_dir;
+
+ if (old_dir_entry) {
+ inc_nlink(new_dir);
+ f2fs_write_inode(new_dir, NULL);
+ }
+ }
+
+ old_inode->i_ctime = CURRENT_TIME;
+ set_inode_flag(F2FS_I(old_inode), FI_NEED_CP);
+ mark_inode_dirty(old_inode);
+
+ f2fs_delete_entry(old_entry, old_page, NULL);
+
+ if (old_dir_entry) {
+ if (old_dir != new_dir) {
+ f2fs_set_link(old_inode, old_dir_entry,
+ old_dir_page, new_dir);
+ } else {
+ kunmap(old_dir_page);
+ f2fs_put_page(old_dir_page, 0);
+ }
+ drop_nlink(old_dir);
+ f2fs_write_inode(old_dir, NULL);
+ }
+
+ mutex_unlock_op(sbi, RENAME);
+ return 0;
+
+out_dir:
+ if (old_dir_entry) {
+ kunmap(old_dir_page);
+ f2fs_put_page(old_dir_page, 0);
+ }
+ mutex_unlock_op(sbi, RENAME);
+out_old:
+ kunmap(old_page);
+ f2fs_put_page(old_page, 0);
+out:
+ return err;
+}
+
+const struct inode_operations f2fs_dir_inode_operations = {
+ .create = f2fs_create,
+ .lookup = f2fs_lookup,
+ .link = f2fs_link,
+ .unlink = f2fs_unlink,
+ .symlink = f2fs_symlink,
+ .mkdir = f2fs_mkdir,
+ .rmdir = f2fs_rmdir,
+ .mknod = f2fs_mknod,
+ .rename = f2fs_rename,
+ .setattr = f2fs_setattr,
+ .get_acl = f2fs_get_acl,
+#ifdef CONFIG_F2FS_FS_XATTR
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};
+
+const struct inode_operations f2fs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
+ .setattr = f2fs_setattr,
+#ifdef CONFIG_F2FS_FS_XATTR
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};
+
+const struct inode_operations f2fs_special_inode_operations = {
+ .setattr = f2fs_setattr,
+ .get_acl = f2fs_get_acl,
+#ifdef CONFIG_F2FS_FS_XATTR
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
new file mode 100644
index 000000000000..9bda63c9c166
--- /dev/null
+++ b/fs/f2fs/node.c
@@ -0,0 +1,1760 @@
+/*
+ * fs/f2fs/node.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/mpage.h>
+#include <linux/backing-dev.h>
+#include <linux/blkdev.h>
+#include <linux/pagevec.h>
+#include <linux/swap.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+
+static struct kmem_cache *nat_entry_slab;
+static struct kmem_cache *free_nid_slab;
+
+static void clear_node_page_dirty(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+ struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
+ unsigned int long flags;
+
+ if (PageDirty(page)) {
+ spin_lock_irqsave(&mapping->tree_lock, flags);
+ radix_tree_tag_clear(&mapping->page_tree,
+ page_index(page),
+ PAGECACHE_TAG_DIRTY);
+ spin_unlock_irqrestore(&mapping->tree_lock, flags);
+
+ clear_page_dirty_for_io(page);
+ dec_page_count(sbi, F2FS_DIRTY_NODES);
+ }
+ ClearPageUptodate(page);
+}
+
+static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ pgoff_t index = current_nat_addr(sbi, nid);
+ return get_meta_page(sbi, index);
+}
+
+static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ struct page *src_page;
+ struct page *dst_page;
+ pgoff_t src_off;
+ pgoff_t dst_off;
+ void *src_addr;
+ void *dst_addr;
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+
+ src_off = current_nat_addr(sbi, nid);
+ dst_off = next_nat_addr(sbi, src_off);
+
+ /* get current nat block page with lock */
+ src_page = get_meta_page(sbi, src_off);
+
+ /* Dirty src_page means that it is already the new target NAT page. */
+ if (PageDirty(src_page))
+ return src_page;
+
+ dst_page = grab_meta_page(sbi, dst_off);
+
+ src_addr = page_address(src_page);
+ dst_addr = page_address(dst_page);
+ memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
+ set_page_dirty(dst_page);
+ f2fs_put_page(src_page, 1);
+
+ set_to_next_nat(nm_i, nid);
+
+ return dst_page;
+}
+
+/*
+ * Readahead NAT pages
+ */
+static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid)
+{
+ struct address_space *mapping = sbi->meta_inode->i_mapping;
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct page *page;
+ pgoff_t index;
+ int i;
+
+ for (i = 0; i < FREE_NID_PAGES; i++, nid += NAT_ENTRY_PER_BLOCK) {
+ if (nid >= nm_i->max_nid)
+ nid = 0;
+ index = current_nat_addr(sbi, nid);
+
+ page = grab_cache_page(mapping, index);
+ if (!page)
+ continue;
+ if (f2fs_readpage(sbi, page, index, READ)) {
+ f2fs_put_page(page, 1);
+ continue;
+ }
+ page_cache_release(page);
+ }
+}
+
+static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n)
+{
+ return radix_tree_lookup(&nm_i->nat_root, n);
+}
+
+static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i,
+ nid_t start, unsigned int nr, struct nat_entry **ep)
+{
+ return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr);
+}
+
+static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
+{
+ list_del(&e->list);
+ radix_tree_delete(&nm_i->nat_root, nat_get_nid(e));
+ nm_i->nat_cnt--;
+ kmem_cache_free(nat_entry_slab, e);
+}
+
+int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct nat_entry *e;
+ int is_cp = 1;
+
+ read_lock(&nm_i->nat_tree_lock);
+ e = __lookup_nat_cache(nm_i, nid);
+ if (e && !e->checkpointed)
+ is_cp = 0;
+ read_unlock(&nm_i->nat_tree_lock);
+ return is_cp;
+}
+
+static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid)
+{
+ struct nat_entry *new;
+
+ new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC);
+ if (!new)
+ return NULL;
+ if (radix_tree_insert(&nm_i->nat_root, nid, new)) {
+ kmem_cache_free(nat_entry_slab, new);
+ return NULL;
+ }
+ memset(new, 0, sizeof(struct nat_entry));
+ nat_set_nid(new, nid);
+ list_add_tail(&new->list, &nm_i->nat_entries);
+ nm_i->nat_cnt++;
+ return new;
+}
+
+static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid,
+ struct f2fs_nat_entry *ne)
+{
+ struct nat_entry *e;
+retry:
+ write_lock(&nm_i->nat_tree_lock);
+ e = __lookup_nat_cache(nm_i, nid);
+ if (!e) {
+ e = grab_nat_entry(nm_i, nid);
+ if (!e) {
+ write_unlock(&nm_i->nat_tree_lock);
+ goto retry;
+ }
+ nat_set_blkaddr(e, le32_to_cpu(ne->block_addr));
+ nat_set_ino(e, le32_to_cpu(ne->ino));
+ nat_set_version(e, ne->version);
+ e->checkpointed = true;
+ }
+ write_unlock(&nm_i->nat_tree_lock);
+}
+
+static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
+ block_t new_blkaddr)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct nat_entry *e;
+retry:
+ write_lock(&nm_i->nat_tree_lock);
+ e = __lookup_nat_cache(nm_i, ni->nid);
+ if (!e) {
+ e = grab_nat_entry(nm_i, ni->nid);
+ if (!e) {
+ write_unlock(&nm_i->nat_tree_lock);
+ goto retry;
+ }
+ e->ni = *ni;
+ e->checkpointed = true;
+ BUG_ON(ni->blk_addr == NEW_ADDR);
+ } else if (new_blkaddr == NEW_ADDR) {
+ /*
+ * when nid is reallocated,
+ * previous nat entry can be remained in nat cache.
+ * So, reinitialize it with new information.
+ */
+ e->ni = *ni;
+ BUG_ON(ni->blk_addr != NULL_ADDR);
+ }
+
+ if (new_blkaddr == NEW_ADDR)
+ e->checkpointed = false;
+
+ /* sanity check */
+ BUG_ON(nat_get_blkaddr(e) != ni->blk_addr);
+ BUG_ON(nat_get_blkaddr(e) == NULL_ADDR &&
+ new_blkaddr == NULL_ADDR);
+ BUG_ON(nat_get_blkaddr(e) == NEW_ADDR &&
+ new_blkaddr == NEW_ADDR);
+ BUG_ON(nat_get_blkaddr(e) != NEW_ADDR &&
+ nat_get_blkaddr(e) != NULL_ADDR &&
+ new_blkaddr == NEW_ADDR);
+
+ /* increament version no as node is removed */
+ if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) {
+ unsigned char version = nat_get_version(e);
+ nat_set_version(e, inc_node_version(version));
+ }
+
+ /* change address */
+ nat_set_blkaddr(e, new_blkaddr);
+ __set_nat_cache_dirty(nm_i, e);
+ write_unlock(&nm_i->nat_tree_lock);
+}
+
+static int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+
+ if (nm_i->nat_cnt < 2 * NM_WOUT_THRESHOLD)
+ return 0;
+
+ write_lock(&nm_i->nat_tree_lock);
+ while (nr_shrink && !list_empty(&nm_i->nat_entries)) {
+ struct nat_entry *ne;
+ ne = list_first_entry(&nm_i->nat_entries,
+ struct nat_entry, list);
+ __del_from_nat_cache(nm_i, ne);
+ nr_shrink--;
+ }
+ write_unlock(&nm_i->nat_tree_lock);
+ return nr_shrink;
+}
+
+/*
+ * This function returns always success
+ */
+void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ nid_t start_nid = START_NID(nid);
+ struct f2fs_nat_block *nat_blk;
+ struct page *page = NULL;
+ struct f2fs_nat_entry ne;
+ struct nat_entry *e;
+ int i;
+
+ memset(&ne, 0, sizeof(struct f2fs_nat_entry));
+ ni->nid = nid;
+
+ /* Check nat cache */
+ read_lock(&nm_i->nat_tree_lock);
+ e = __lookup_nat_cache(nm_i, nid);
+ if (e) {
+ ni->ino = nat_get_ino(e);
+ ni->blk_addr = nat_get_blkaddr(e);
+ ni->version = nat_get_version(e);
+ }
+ read_unlock(&nm_i->nat_tree_lock);
+ if (e)
+ return;
+
+ /* Check current segment summary */
+ mutex_lock(&curseg->curseg_mutex);
+ i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0);
+ if (i >= 0) {
+ ne = nat_in_journal(sum, i);
+ node_info_from_raw_nat(ni, &ne);
+ }
+ mutex_unlock(&curseg->curseg_mutex);
+ if (i >= 0)
+ goto cache;
+
+ /* Fill node_info from nat page */
+ page = get_current_nat_page(sbi, start_nid);
+ nat_blk = (struct f2fs_nat_block *)page_address(page);
+ ne = nat_blk->entries[nid - start_nid];
+ node_info_from_raw_nat(ni, &ne);
+ f2fs_put_page(page, 1);
+cache:
+ /* cache nat entry */
+ cache_nat_entry(NM_I(sbi), nid, &ne);
+}
+
+/*
+ * The maximum depth is four.
+ * Offset[0] will have raw inode offset.
+ */
+static int get_node_path(long block, int offset[4], unsigned int noffset[4])
+{
+ const long direct_index = ADDRS_PER_INODE;
+ const long direct_blks = ADDRS_PER_BLOCK;
+ const long dptrs_per_blk = NIDS_PER_BLOCK;
+ const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
+ const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK;
+ int n = 0;
+ int level = 0;
+
+ noffset[0] = 0;
+
+ if (block < direct_index) {
+ offset[n++] = block;
+ level = 0;
+ goto got;
+ }
+ block -= direct_index;
+ if (block < direct_blks) {
+ offset[n++] = NODE_DIR1_BLOCK;
+ noffset[n] = 1;
+ offset[n++] = block;
+ level = 1;
+ goto got;
+ }
+ block -= direct_blks;
+ if (block < direct_blks) {
+ offset[n++] = NODE_DIR2_BLOCK;
+ noffset[n] = 2;
+ offset[n++] = block;
+ level = 1;
+ goto got;
+ }
+ block -= direct_blks;
+ if (block < indirect_blks) {
+ offset[n++] = NODE_IND1_BLOCK;
+ noffset[n] = 3;
+ offset[n++] = block / direct_blks;
+ noffset[n] = 4 + offset[n - 1];
+ offset[n++] = block % direct_blks;
+ level = 2;
+ goto got;
+ }
+ block -= indirect_blks;
+ if (block < indirect_blks) {
+ offset[n++] = NODE_IND2_BLOCK;
+ noffset[n] = 4 + dptrs_per_blk;
+ offset[n++] = block / direct_blks;
+ noffset[n] = 5 + dptrs_per_blk + offset[n - 1];
+ offset[n++] = block % direct_blks;
+ level = 2;
+ goto got;
+ }
+ block -= indirect_blks;
+ if (block < dindirect_blks) {
+ offset[n++] = NODE_DIND_BLOCK;
+ noffset[n] = 5 + (dptrs_per_blk * 2);
+ offset[n++] = block / indirect_blks;
+ noffset[n] = 6 + (dptrs_per_blk * 2) +
+ offset[n - 1] * (dptrs_per_blk + 1);
+ offset[n++] = (block / direct_blks) % dptrs_per_blk;
+ noffset[n] = 7 + (dptrs_per_blk * 2) +
+ offset[n - 2] * (dptrs_per_blk + 1) +
+ offset[n - 1];
+ offset[n++] = block % direct_blks;
+ level = 3;
+ goto got;
+ } else {
+ BUG();
+ }
+got:
+ return level;
+}
+
+/*
+ * Caller should call f2fs_put_dnode(dn).
+ */
+int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int ro)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct page *npage[4];
+ struct page *parent;
+ int offset[4];
+ unsigned int noffset[4];
+ nid_t nids[4];
+ int level, i;
+ int err = 0;
+
+ level = get_node_path(index, offset, noffset);
+
+ nids[0] = dn->inode->i_ino;
+ npage[0] = get_node_page(sbi, nids[0]);
+ if (IS_ERR(npage[0]))
+ return PTR_ERR(npage[0]);
+
+ parent = npage[0];
+ nids[1] = get_nid(parent, offset[0], true);
+ dn->inode_page = npage[0];
+ dn->inode_page_locked = true;
+
+ /* get indirect or direct nodes */
+ for (i = 1; i <= level; i++) {
+ bool done = false;
+
+ if (!nids[i] && !ro) {
+ mutex_lock_op(sbi, NODE_NEW);
+
+ /* alloc new node */
+ if (!alloc_nid(sbi, &(nids[i]))) {
+ mutex_unlock_op(sbi, NODE_NEW);
+ err = -ENOSPC;
+ goto release_pages;
+ }
+
+ dn->nid = nids[i];
+ npage[i] = new_node_page(dn, noffset[i]);
+ if (IS_ERR(npage[i])) {
+ alloc_nid_failed(sbi, nids[i]);
+ mutex_unlock_op(sbi, NODE_NEW);
+ err = PTR_ERR(npage[i]);
+ goto release_pages;
+ }
+
+ set_nid(parent, offset[i - 1], nids[i], i == 1);
+ alloc_nid_done(sbi, nids[i]);
+ mutex_unlock_op(sbi, NODE_NEW);
+ done = true;
+ } else if (ro && i == level && level > 1) {
+ npage[i] = get_node_page_ra(parent, offset[i - 1]);
+ if (IS_ERR(npage[i])) {
+ err = PTR_ERR(npage[i]);
+ goto release_pages;
+ }
+ done = true;
+ }
+ if (i == 1) {
+ dn->inode_page_locked = false;
+ unlock_page(parent);
+ } else {
+ f2fs_put_page(parent, 1);
+ }
+
+ if (!done) {
+ npage[i] = get_node_page(sbi, nids[i]);
+ if (IS_ERR(npage[i])) {
+ err = PTR_ERR(npage[i]);
+ f2fs_put_page(npage[0], 0);
+ goto release_out;
+ }
+ }
+ if (i < level) {
+ parent = npage[i];
+ nids[i + 1] = get_nid(parent, offset[i], false);
+ }
+ }
+ dn->nid = nids[level];
+ dn->ofs_in_node = offset[level];
+ dn->node_page = npage[level];
+ dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
+ return 0;
+
+release_pages:
+ f2fs_put_page(parent, 1);
+ if (i > 1)
+ f2fs_put_page(npage[0], 0);
+release_out:
+ dn->inode_page = NULL;
+ dn->node_page = NULL;
+ return err;
+}
+
+static void truncate_node(struct dnode_of_data *dn)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct node_info ni;
+
+ get_node_info(sbi, dn->nid, &ni);
+ if (dn->inode->i_blocks == 0) {
+ BUG_ON(ni.blk_addr != NULL_ADDR);
+ goto invalidate;
+ }
+ BUG_ON(ni.blk_addr == NULL_ADDR);
+
+ /* Deallocate node address */
+ invalidate_blocks(sbi, ni.blk_addr);
+ dec_valid_node_count(sbi, dn->inode, 1);
+ set_node_addr(sbi, &ni, NULL_ADDR);
+
+ if (dn->nid == dn->inode->i_ino) {
+ remove_orphan_inode(sbi, dn->nid);
+ dec_valid_inode_count(sbi);
+ } else {
+ sync_inode_page(dn);
+ }
+invalidate:
+ clear_node_page_dirty(dn->node_page);
+ F2FS_SET_SB_DIRT(sbi);
+
+ f2fs_put_page(dn->node_page, 1);
+ dn->node_page = NULL;
+}
+
+static int truncate_dnode(struct dnode_of_data *dn)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct page *page;
+
+ if (dn->nid == 0)
+ return 1;
+
+ /* get direct node */
+ page = get_node_page(sbi, dn->nid);
+ if (IS_ERR(page) && PTR_ERR(page) == -ENOENT)
+ return 1;
+ else if (IS_ERR(page))
+ return PTR_ERR(page);
+
+ /* Make dnode_of_data for parameter */
+ dn->node_page = page;
+ dn->ofs_in_node = 0;
+ truncate_data_blocks(dn);
+ truncate_node(dn);
+ return 1;
+}
+
+static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
+ int ofs, int depth)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct dnode_of_data rdn = *dn;
+ struct page *page;
+ struct f2fs_node *rn;
+ nid_t child_nid;
+ unsigned int child_nofs;
+ int freed = 0;
+ int i, ret;
+
+ if (dn->nid == 0)
+ return NIDS_PER_BLOCK + 1;
+
+ page = get_node_page(sbi, dn->nid);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+
+ rn = (struct f2fs_node *)page_address(page);
+ if (depth < 3) {
+ for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) {
+ child_nid = le32_to_cpu(rn->in.nid[i]);
+ if (child_nid == 0)
+ continue;
+ rdn.nid = child_nid;
+ ret = truncate_dnode(&rdn);
+ if (ret < 0)
+ goto out_err;
+ set_nid(page, i, 0, false);
+ }
+ } else {
+ child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1;
+ for (i = ofs; i < NIDS_PER_BLOCK; i++) {
+ child_nid = le32_to_cpu(rn->in.nid[i]);
+ if (child_nid == 0) {
+ child_nofs += NIDS_PER_BLOCK + 1;
+ continue;
+ }
+ rdn.nid = child_nid;
+ ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
+ if (ret == (NIDS_PER_BLOCK + 1)) {
+ set_nid(page, i, 0, false);
+ child_nofs += ret;
+ } else if (ret < 0 && ret != -ENOENT) {
+ goto out_err;
+ }
+ }
+ freed = child_nofs;
+ }
+
+ if (!ofs) {
+ /* remove current indirect node */
+ dn->node_page = page;
+ truncate_node(dn);
+ freed++;
+ } else {
+ f2fs_put_page(page, 1);
+ }
+ return freed;
+
+out_err:
+ f2fs_put_page(page, 1);
+ return ret;
+}
+
+static int truncate_partial_nodes(struct dnode_of_data *dn,
+ struct f2fs_inode *ri, int *offset, int depth)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct page *pages[2];
+ nid_t nid[3];
+ nid_t child_nid;
+ int err = 0;
+ int i;
+ int idx = depth - 2;
+
+ nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]);
+ if (!nid[0])
+ return 0;
+
+ /* get indirect nodes in the path */
+ for (i = 0; i < depth - 1; i++) {
+ /* refernece count'll be increased */
+ pages[i] = get_node_page(sbi, nid[i]);
+ if (IS_ERR(pages[i])) {
+ depth = i + 1;
+ err = PTR_ERR(pages[i]);
+ goto fail;
+ }
+ nid[i + 1] = get_nid(pages[i], offset[i + 1], false);
+ }
+
+ /* free direct nodes linked to a partial indirect node */
+ for (i = offset[depth - 1]; i < NIDS_PER_BLOCK; i++) {
+ child_nid = get_nid(pages[idx], i, false);
+ if (!child_nid)
+ continue;
+ dn->nid = child_nid;
+ err = truncate_dnode(dn);
+ if (err < 0)
+ goto fail;
+ set_nid(pages[idx], i, 0, false);
+ }
+
+ if (offset[depth - 1] == 0) {
+ dn->node_page = pages[idx];
+ dn->nid = nid[idx];
+ truncate_node(dn);
+ } else {
+ f2fs_put_page(pages[idx], 1);
+ }
+ offset[idx]++;
+ offset[depth - 1] = 0;
+fail:
+ for (i = depth - 3; i >= 0; i--)
+ f2fs_put_page(pages[i], 1);
+ return err;
+}
+
+/*
+ * All the block addresses of data and nodes should be nullified.
+ */
+int truncate_inode_blocks(struct inode *inode, pgoff_t from)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ int err = 0, cont = 1;
+ int level, offset[4], noffset[4];
+ unsigned int nofs;
+ struct f2fs_node *rn;
+ struct dnode_of_data dn;
+ struct page *page;
+
+ level = get_node_path(from, offset, noffset);
+
+ page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+
+ set_new_dnode(&dn, inode, page, NULL, 0);
+ unlock_page(page);
+
+ rn = page_address(page);
+ switch (level) {
+ case 0:
+ case 1:
+ nofs = noffset[1];
+ break;
+ case 2:
+ nofs = noffset[1];
+ if (!offset[level - 1])
+ goto skip_partial;
+ err = truncate_partial_nodes(&dn, &rn->i, offset, level);
+ if (err < 0 && err != -ENOENT)
+ goto fail;
+ nofs += 1 + NIDS_PER_BLOCK;
+ break;
+ case 3:
+ nofs = 5 + 2 * NIDS_PER_BLOCK;
+ if (!offset[level - 1])
+ goto skip_partial;
+ err = truncate_partial_nodes(&dn, &rn->i, offset, level);
+ if (err < 0 && err != -ENOENT)
+ goto fail;
+ break;
+ default:
+ BUG();
+ }
+
+skip_partial:
+ while (cont) {
+ dn.nid = le32_to_cpu(rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]);
+ switch (offset[0]) {
+ case NODE_DIR1_BLOCK:
+ case NODE_DIR2_BLOCK:
+ err = truncate_dnode(&dn);
+ break;
+
+ case NODE_IND1_BLOCK:
+ case NODE_IND2_BLOCK:
+ err = truncate_nodes(&dn, nofs, offset[1], 2);
+ break;
+
+ case NODE_DIND_BLOCK:
+ err = truncate_nodes(&dn, nofs, offset[1], 3);
+ cont = 0;
+ break;
+
+ default:
+ BUG();
+ }
+ if (err < 0 && err != -ENOENT)
+ goto fail;
+ if (offset[1] == 0 &&
+ rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]) {
+ lock_page(page);
+ wait_on_page_writeback(page);
+ rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK] = 0;
+ set_page_dirty(page);
+ unlock_page(page);
+ }
+ offset[1] = 0;
+ offset[0]++;
+ nofs += err;
+ }
+fail:
+ f2fs_put_page(page, 0);
+ return err > 0 ? 0 : err;
+}
+
+int remove_inode_page(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct page *page;
+ nid_t ino = inode->i_ino;
+ struct dnode_of_data dn;
+
+ mutex_lock_op(sbi, NODE_TRUNC);
+ page = get_node_page(sbi, ino);
+ if (IS_ERR(page)) {
+ mutex_unlock_op(sbi, NODE_TRUNC);
+ return PTR_ERR(page);
+ }
+
+ if (F2FS_I(inode)->i_xattr_nid) {
+ nid_t nid = F2FS_I(inode)->i_xattr_nid;
+ struct page *npage = get_node_page(sbi, nid);
+
+ if (IS_ERR(npage)) {
+ mutex_unlock_op(sbi, NODE_TRUNC);
+ return PTR_ERR(npage);
+ }
+
+ F2FS_I(inode)->i_xattr_nid = 0;
+ set_new_dnode(&dn, inode, page, npage, nid);
+ dn.inode_page_locked = 1;
+ truncate_node(&dn);
+ }
+
+ /* 0 is possible, after f2fs_new_inode() is failed */
+ BUG_ON(inode->i_blocks != 0 && inode->i_blocks != 1);
+ set_new_dnode(&dn, inode, page, page, ino);
+ truncate_node(&dn);
+
+ mutex_unlock_op(sbi, NODE_TRUNC);
+ return 0;
+}
+
+int new_inode_page(struct inode *inode, struct dentry *dentry)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct page *page;
+ struct dnode_of_data dn;
+
+ /* allocate inode page for new inode */
+ set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino);
+ mutex_lock_op(sbi, NODE_NEW);
+ page = new_node_page(&dn, 0);
+ init_dent_inode(dentry, page);
+ mutex_unlock_op(sbi, NODE_NEW);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+ f2fs_put_page(page, 1);
+ return 0;
+}
+
+struct page *new_node_page(struct dnode_of_data *dn, unsigned int ofs)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
+ struct address_space *mapping = sbi->node_inode->i_mapping;
+ struct node_info old_ni, new_ni;
+ struct page *page;
+ int err;
+
+ if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))
+ return ERR_PTR(-EPERM);
+
+ page = grab_cache_page(mapping, dn->nid);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ get_node_info(sbi, dn->nid, &old_ni);
+
+ SetPageUptodate(page);
+ fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true);
+
+ /* Reinitialize old_ni with new node page */
+ BUG_ON(old_ni.blk_addr != NULL_ADDR);
+ new_ni = old_ni;
+ new_ni.ino = dn->inode->i_ino;
+
+ if (!inc_valid_node_count(sbi, dn->inode, 1)) {
+ err = -ENOSPC;
+ goto fail;
+ }
+ set_node_addr(sbi, &new_ni, NEW_ADDR);
+ set_cold_node(dn->inode, page);
+
+ dn->node_page = page;
+ sync_inode_page(dn);
+ set_page_dirty(page);
+ if (ofs == 0)
+ inc_valid_inode_count(sbi);
+
+ return page;
+
+fail:
+ clear_node_page_dirty(page);
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+}
+
+static int read_node_page(struct page *page, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
+ struct node_info ni;
+
+ get_node_info(sbi, page->index, &ni);
+
+ if (ni.blk_addr == NULL_ADDR)
+ return -ENOENT;
+ return f2fs_readpage(sbi, page, ni.blk_addr, type);
+}
+
+/*
+ * Readahead a node page
+ */
+void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ struct address_space *mapping = sbi->node_inode->i_mapping;
+ struct page *apage;
+
+ apage = find_get_page(mapping, nid);
+ if (apage && PageUptodate(apage))
+ goto release_out;
+ f2fs_put_page(apage, 0);
+
+ apage = grab_cache_page(mapping, nid);
+ if (!apage)
+ return;
+
+ if (read_node_page(apage, READA))
+ goto unlock_out;
+
+ page_cache_release(apage);
+ return;
+
+unlock_out:
+ unlock_page(apage);
+release_out:
+ page_cache_release(apage);
+}
+
+struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid)
+{
+ int err;
+ struct page *page;
+ struct address_space *mapping = sbi->node_inode->i_mapping;
+
+ page = grab_cache_page(mapping, nid);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ err = read_node_page(page, READ_SYNC);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+
+ BUG_ON(nid != nid_of_node(page));
+ mark_page_accessed(page);
+ return page;
+}
+
+/*
+ * Return a locked page for the desired node page.
+ * And, readahead MAX_RA_NODE number of node pages.
+ */
+struct page *get_node_page_ra(struct page *parent, int start)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb);
+ struct address_space *mapping = sbi->node_inode->i_mapping;
+ int i, end;
+ int err = 0;
+ nid_t nid;
+ struct page *page;
+
+ /* First, try getting the desired direct node. */
+ nid = get_nid(parent, start, false);
+ if (!nid)
+ return ERR_PTR(-ENOENT);
+
+ page = find_get_page(mapping, nid);
+ if (page && PageUptodate(page))
+ goto page_hit;
+ f2fs_put_page(page, 0);
+
+repeat:
+ page = grab_cache_page(mapping, nid);
+ if (!page)
+ return ERR_PTR(-ENOMEM);
+
+ err = read_node_page(page, READA);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+
+ /* Then, try readahead for siblings of the desired node */
+ end = start + MAX_RA_NODE;
+ end = min(end, NIDS_PER_BLOCK);
+ for (i = start + 1; i < end; i++) {
+ nid = get_nid(parent, i, false);
+ if (!nid)
+ continue;
+ ra_node_page(sbi, nid);
+ }
+
+page_hit:
+ lock_page(page);
+ if (PageError(page)) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(-EIO);
+ }
+
+ /* Has the page been truncated? */
+ if (page->mapping != mapping) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+ return page;
+}
+
+void sync_inode_page(struct dnode_of_data *dn)
+{
+ if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) {
+ update_inode(dn->inode, dn->node_page);
+ } else if (dn->inode_page) {
+ if (!dn->inode_page_locked)
+ lock_page(dn->inode_page);
+ update_inode(dn->inode, dn->inode_page);
+ if (!dn->inode_page_locked)
+ unlock_page(dn->inode_page);
+ } else {
+ f2fs_write_inode(dn->inode, NULL);
+ }
+}
+
+int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
+ struct writeback_control *wbc)
+{
+ struct address_space *mapping = sbi->node_inode->i_mapping;
+ pgoff_t index, end;
+ struct pagevec pvec;
+ int step = ino ? 2 : 0;
+ int nwritten = 0, wrote = 0;
+
+ pagevec_init(&pvec, 0);
+
+next_step:
+ index = 0;
+ end = LONG_MAX;
+
+ while (index <= end) {
+ int i, nr_pages;
+ nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_DIRTY,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
+ if (nr_pages == 0)
+ break;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+
+ /*
+ * flushing sequence with step:
+ * 0. indirect nodes
+ * 1. dentry dnodes
+ * 2. file dnodes
+ */
+ if (step == 0 && IS_DNODE(page))
+ continue;
+ if (step == 1 && (!IS_DNODE(page) ||
+ is_cold_node(page)))
+ continue;
+ if (step == 2 && (!IS_DNODE(page) ||
+ !is_cold_node(page)))
+ continue;
+
+ /*
+ * If an fsync mode,
+ * we should not skip writing node pages.
+ */
+ if (ino && ino_of_node(page) == ino)
+ lock_page(page);
+ else if (!trylock_page(page))
+ continue;
+
+ if (unlikely(page->mapping != mapping)) {
+continue_unlock:
+ unlock_page(page);
+ continue;
+ }
+ if (ino && ino_of_node(page) != ino)
+ goto continue_unlock;
+
+ if (!PageDirty(page)) {
+ /* someone wrote it for us */
+ goto continue_unlock;
+ }
+
+ if (!clear_page_dirty_for_io(page))
+ goto continue_unlock;
+
+ /* called by fsync() */
+ if (ino && IS_DNODE(page)) {
+ int mark = !is_checkpointed_node(sbi, ino);
+ set_fsync_mark(page, 1);
+ if (IS_INODE(page))
+ set_dentry_mark(page, mark);
+ nwritten++;
+ } else {
+ set_fsync_mark(page, 0);
+ set_dentry_mark(page, 0);
+ }
+ mapping->a_ops->writepage(page, wbc);
+ wrote++;
+
+ if (--wbc->nr_to_write == 0)
+ break;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+
+ if (wbc->nr_to_write == 0) {
+ step = 2;
+ break;
+ }
+ }
+
+ if (step < 2) {
+ step++;
+ goto next_step;
+ }
+
+ if (wrote)
+ f2fs_submit_bio(sbi, NODE, wbc->sync_mode == WB_SYNC_ALL);
+
+ return nwritten;
+}
+
+static int f2fs_write_node_page(struct page *page,
+ struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
+ nid_t nid;
+ block_t new_addr;
+ struct node_info ni;
+
+ if (wbc->for_reclaim) {
+ dec_page_count(sbi, F2FS_DIRTY_NODES);
+ wbc->pages_skipped++;
+ set_page_dirty(page);
+ return AOP_WRITEPAGE_ACTIVATE;
+ }
+
+ wait_on_page_writeback(page);
+
+ mutex_lock_op(sbi, NODE_WRITE);
+
+ /* get old block addr of this node page */
+ nid = nid_of_node(page);
+ BUG_ON(page->index != nid);
+
+ get_node_info(sbi, nid, &ni);
+
+ /* This page is already truncated */
+ if (ni.blk_addr == NULL_ADDR)
+ return 0;
+
+ set_page_writeback(page);
+
+ /* insert node offset */
+ write_node_page(sbi, page, nid, ni.blk_addr, &new_addr);
+ set_node_addr(sbi, &ni, new_addr);
+ dec_page_count(sbi, F2FS_DIRTY_NODES);
+
+ mutex_unlock_op(sbi, NODE_WRITE);
+ unlock_page(page);
+ return 0;
+}
+
+/*
+ * It is very important to gather dirty pages and write at once, so that we can
+ * submit a big bio without interfering other data writes.
+ * Be default, 512 pages (2MB), a segment size, is quite reasonable.
+ */
+#define COLLECT_DIRTY_NODES 512
+static int f2fs_write_node_pages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
+ struct block_device *bdev = sbi->sb->s_bdev;
+ long nr_to_write = wbc->nr_to_write;
+
+ /* First check balancing cached NAT entries */
+ if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK)) {
+ write_checkpoint(sbi, false, false);
+ return 0;
+ }
+
+ /* collect a number of dirty node pages and write together */
+ if (get_pages(sbi, F2FS_DIRTY_NODES) < COLLECT_DIRTY_NODES)
+ return 0;
+
+ /* if mounting is failed, skip writing node pages */
+ wbc->nr_to_write = bio_get_nr_vecs(bdev);
+ sync_node_pages(sbi, 0, wbc);
+ wbc->nr_to_write = nr_to_write -
+ (bio_get_nr_vecs(bdev) - wbc->nr_to_write);
+ return 0;
+}
+
+static int f2fs_set_node_page_dirty(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+ struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
+
+ SetPageUptodate(page);
+ if (!PageDirty(page)) {
+ __set_page_dirty_nobuffers(page);
+ inc_page_count(sbi, F2FS_DIRTY_NODES);
+ SetPagePrivate(page);
+ return 1;
+ }
+ return 0;
+}
+
+static void f2fs_invalidate_node_page(struct page *page, unsigned long offset)
+{
+ struct inode *inode = page->mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ if (PageDirty(page))
+ dec_page_count(sbi, F2FS_DIRTY_NODES);
+ ClearPagePrivate(page);
+}
+
+static int f2fs_release_node_page(struct page *page, gfp_t wait)
+{
+ ClearPagePrivate(page);
+ return 0;
+}
+
+/*
+ * Structure of the f2fs node operations
+ */
+const struct address_space_operations f2fs_node_aops = {
+ .writepage = f2fs_write_node_page,
+ .writepages = f2fs_write_node_pages,
+ .set_page_dirty = f2fs_set_node_page_dirty,
+ .invalidatepage = f2fs_invalidate_node_page,
+ .releasepage = f2fs_release_node_page,
+};
+
+static struct free_nid *__lookup_free_nid_list(nid_t n, struct list_head *head)
+{
+ struct list_head *this;
+ struct free_nid *i = NULL;
+ list_for_each(this, head) {
+ i = list_entry(this, struct free_nid, list);
+ if (i->nid == n)
+ break;
+ i = NULL;
+ }
+ return i;
+}
+
+static void __del_from_free_nid_list(struct free_nid *i)
+{
+ list_del(&i->list);
+ kmem_cache_free(free_nid_slab, i);
+}
+
+static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
+{
+ struct free_nid *i;
+
+ if (nm_i->fcnt > 2 * MAX_FREE_NIDS)
+ return 0;
+retry:
+ i = kmem_cache_alloc(free_nid_slab, GFP_NOFS);
+ if (!i) {
+ cond_resched();
+ goto retry;
+ }
+ i->nid = nid;
+ i->state = NID_NEW;
+
+ spin_lock(&nm_i->free_nid_list_lock);
+ if (__lookup_free_nid_list(nid, &nm_i->free_nid_list)) {
+ spin_unlock(&nm_i->free_nid_list_lock);
+ kmem_cache_free(free_nid_slab, i);
+ return 0;
+ }
+ list_add_tail(&i->list, &nm_i->free_nid_list);
+ nm_i->fcnt++;
+ spin_unlock(&nm_i->free_nid_list_lock);
+ return 1;
+}
+
+static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
+{
+ struct free_nid *i;
+ spin_lock(&nm_i->free_nid_list_lock);
+ i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
+ if (i && i->state == NID_NEW) {
+ __del_from_free_nid_list(i);
+ nm_i->fcnt--;
+ }
+ spin_unlock(&nm_i->free_nid_list_lock);
+}
+
+static int scan_nat_page(struct f2fs_nm_info *nm_i,
+ struct page *nat_page, nid_t start_nid)
+{
+ struct f2fs_nat_block *nat_blk = page_address(nat_page);
+ block_t blk_addr;
+ int fcnt = 0;
+ int i;
+
+ /* 0 nid should not be used */
+ if (start_nid == 0)
+ ++start_nid;
+
+ i = start_nid % NAT_ENTRY_PER_BLOCK;
+
+ for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {
+ blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
+ BUG_ON(blk_addr == NEW_ADDR);
+ if (blk_addr == NULL_ADDR)
+ fcnt += add_free_nid(nm_i, start_nid);
+ }
+ return fcnt;
+}
+
+static void build_free_nids(struct f2fs_sb_info *sbi)
+{
+ struct free_nid *fnid, *next_fnid;
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ nid_t nid = 0;
+ bool is_cycled = false;
+ int fcnt = 0;
+ int i;
+
+ nid = nm_i->next_scan_nid;
+ nm_i->init_scan_nid = nid;
+
+ ra_nat_pages(sbi, nid);
+
+ while (1) {
+ struct page *page = get_current_nat_page(sbi, nid);
+
+ fcnt += scan_nat_page(nm_i, page, nid);
+ f2fs_put_page(page, 1);
+
+ nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
+
+ if (nid >= nm_i->max_nid) {
+ nid = 0;
+ is_cycled = true;
+ }
+ if (fcnt > MAX_FREE_NIDS)
+ break;
+ if (is_cycled && nm_i->init_scan_nid <= nid)
+ break;
+ }
+
+ nm_i->next_scan_nid = nid;
+
+ /* find free nids from current sum_pages */
+ mutex_lock(&curseg->curseg_mutex);
+ for (i = 0; i < nats_in_cursum(sum); i++) {
+ block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr);
+ nid = le32_to_cpu(nid_in_journal(sum, i));
+ if (addr == NULL_ADDR)
+ add_free_nid(nm_i, nid);
+ else
+ remove_free_nid(nm_i, nid);
+ }
+ mutex_unlock(&curseg->curseg_mutex);
+
+ /* remove the free nids from current allocated nids */
+ list_for_each_entry_safe(fnid, next_fnid, &nm_i->free_nid_list, list) {
+ struct nat_entry *ne;
+
+ read_lock(&nm_i->nat_tree_lock);
+ ne = __lookup_nat_cache(nm_i, fnid->nid);
+ if (ne && nat_get_blkaddr(ne) != NULL_ADDR)
+ remove_free_nid(nm_i, fnid->nid);
+ read_unlock(&nm_i->nat_tree_lock);
+ }
+}
+
+/*
+ * If this function returns success, caller can obtain a new nid
+ * from second parameter of this function.
+ * The returned nid could be used ino as well as nid when inode is created.
+ */
+bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct free_nid *i = NULL;
+ struct list_head *this;
+retry:
+ mutex_lock(&nm_i->build_lock);
+ if (!nm_i->fcnt) {
+ /* scan NAT in order to build free nid list */
+ build_free_nids(sbi);
+ if (!nm_i->fcnt) {
+ mutex_unlock(&nm_i->build_lock);
+ return false;
+ }
+ }
+ mutex_unlock(&nm_i->build_lock);
+
+ /*
+ * We check fcnt again since previous check is racy as
+ * we didn't hold free_nid_list_lock. So other thread
+ * could consume all of free nids.
+ */
+ spin_lock(&nm_i->free_nid_list_lock);
+ if (!nm_i->fcnt) {
+ spin_unlock(&nm_i->free_nid_list_lock);
+ goto retry;
+ }
+
+ BUG_ON(list_empty(&nm_i->free_nid_list));
+ list_for_each(this, &nm_i->free_nid_list) {
+ i = list_entry(this, struct free_nid, list);
+ if (i->state == NID_NEW)
+ break;
+ }
+
+ BUG_ON(i->state != NID_NEW);
+ *nid = i->nid;
+ i->state = NID_ALLOC;
+ nm_i->fcnt--;
+ spin_unlock(&nm_i->free_nid_list_lock);
+ return true;
+}
+
+/*
+ * alloc_nid() should be called prior to this function.
+ */
+void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct free_nid *i;
+
+ spin_lock(&nm_i->free_nid_list_lock);
+ i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
+ if (i) {
+ BUG_ON(i->state != NID_ALLOC);
+ __del_from_free_nid_list(i);
+ }
+ spin_unlock(&nm_i->free_nid_list_lock);
+}
+
+/*
+ * alloc_nid() should be called prior to this function.
+ */
+void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
+{
+ alloc_nid_done(sbi, nid);
+ add_free_nid(NM_I(sbi), nid);
+}
+
+void recover_node_page(struct f2fs_sb_info *sbi, struct page *page,
+ struct f2fs_summary *sum, struct node_info *ni,
+ block_t new_blkaddr)
+{
+ rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr);
+ set_node_addr(sbi, ni, new_blkaddr);
+ clear_node_page_dirty(page);
+}
+
+int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
+{
+ struct address_space *mapping = sbi->node_inode->i_mapping;
+ struct f2fs_node *src, *dst;
+ nid_t ino = ino_of_node(page);
+ struct node_info old_ni, new_ni;
+ struct page *ipage;
+
+ ipage = grab_cache_page(mapping, ino);
+ if (!ipage)
+ return -ENOMEM;
+
+ /* Should not use this inode from free nid list */
+ remove_free_nid(NM_I(sbi), ino);
+
+ get_node_info(sbi, ino, &old_ni);
+ SetPageUptodate(ipage);
+ fill_node_footer(ipage, ino, ino, 0, true);
+
+ src = (struct f2fs_node *)page_address(page);
+ dst = (struct f2fs_node *)page_address(ipage);
+
+ memcpy(dst, src, (unsigned long)&src->i.i_ext - (unsigned long)&src->i);
+ dst->i.i_size = 0;
+ dst->i.i_blocks = cpu_to_le64(1);
+ dst->i.i_links = cpu_to_le32(1);
+ dst->i.i_xattr_nid = 0;
+
+ new_ni = old_ni;
+ new_ni.ino = ino;
+
+ set_node_addr(sbi, &new_ni, NEW_ADDR);
+ inc_valid_inode_count(sbi);
+
+ f2fs_put_page(ipage, 1);
+ return 0;
+}
+
+int restore_node_summary(struct f2fs_sb_info *sbi,
+ unsigned int segno, struct f2fs_summary_block *sum)
+{
+ struct f2fs_node *rn;
+ struct f2fs_summary *sum_entry;
+ struct page *page;
+ block_t addr;
+ int i, last_offset;
+
+ /* alloc temporal page for read node */
+ page = alloc_page(GFP_NOFS | __GFP_ZERO);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+ lock_page(page);
+
+ /* scan the node segment */
+ last_offset = sbi->blocks_per_seg;
+ addr = START_BLOCK(sbi, segno);
+ sum_entry = &sum->entries[0];
+
+ for (i = 0; i < last_offset; i++, sum_entry++) {
+ if (f2fs_readpage(sbi, page, addr, READ_SYNC))
+ goto out;
+
+ rn = (struct f2fs_node *)page_address(page);
+ sum_entry->nid = rn->footer.nid;
+ sum_entry->version = 0;
+ sum_entry->ofs_in_node = 0;
+ addr++;
+
+ /*
+ * In order to read next node page,
+ * we must clear PageUptodate flag.
+ */
+ ClearPageUptodate(page);
+ }
+out:
+ unlock_page(page);
+ __free_pages(page, 0);
+ return 0;
+}
+
+static bool flush_nats_in_journal(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ int i;
+
+ mutex_lock(&curseg->curseg_mutex);
+
+ if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) {
+ mutex_unlock(&curseg->curseg_mutex);
+ return false;
+ }
+
+ for (i = 0; i < nats_in_cursum(sum); i++) {
+ struct nat_entry *ne;
+ struct f2fs_nat_entry raw_ne;
+ nid_t nid = le32_to_cpu(nid_in_journal(sum, i));
+
+ raw_ne = nat_in_journal(sum, i);
+retry:
+ write_lock(&nm_i->nat_tree_lock);
+ ne = __lookup_nat_cache(nm_i, nid);
+ if (ne) {
+ __set_nat_cache_dirty(nm_i, ne);
+ write_unlock(&nm_i->nat_tree_lock);
+ continue;
+ }
+ ne = grab_nat_entry(nm_i, nid);
+ if (!ne) {
+ write_unlock(&nm_i->nat_tree_lock);
+ goto retry;
+ }
+ nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr));
+ nat_set_ino(ne, le32_to_cpu(raw_ne.ino));
+ nat_set_version(ne, raw_ne.version);
+ __set_nat_cache_dirty(nm_i, ne);
+ write_unlock(&nm_i->nat_tree_lock);
+ }
+ update_nats_in_cursum(sum, -i);
+ mutex_unlock(&curseg->curseg_mutex);
+ return true;
+}
+
+/*
+ * This function is called during the checkpointing process.
+ */
+void flush_nat_entries(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ struct list_head *cur, *n;
+ struct page *page = NULL;
+ struct f2fs_nat_block *nat_blk = NULL;
+ nid_t start_nid = 0, end_nid = 0;
+ bool flushed;
+
+ flushed = flush_nats_in_journal(sbi);
+
+ if (!flushed)
+ mutex_lock(&curseg->curseg_mutex);
+
+ /* 1) flush dirty nat caches */
+ list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) {
+ struct nat_entry *ne;
+ nid_t nid;
+ struct f2fs_nat_entry raw_ne;
+ int offset = -1;
+ block_t new_blkaddr;
+
+ ne = list_entry(cur, struct nat_entry, list);
+ nid = nat_get_nid(ne);
+
+ if (nat_get_blkaddr(ne) == NEW_ADDR)
+ continue;
+ if (flushed)
+ goto to_nat_page;
+
+ /* if there is room for nat enries in curseg->sumpage */
+ offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1);
+ if (offset >= 0) {
+ raw_ne = nat_in_journal(sum, offset);
+ goto flush_now;
+ }
+to_nat_page:
+ if (!page || (start_nid > nid || nid > end_nid)) {
+ if (page) {
+ f2fs_put_page(page, 1);
+ page = NULL;
+ }
+ start_nid = START_NID(nid);
+ end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1;
+
+ /*
+ * get nat block with dirty flag, increased reference
+ * count, mapped and lock
+ */
+ page = get_next_nat_page(sbi, start_nid);
+ nat_blk = page_address(page);
+ }
+
+ BUG_ON(!nat_blk);
+ raw_ne = nat_blk->entries[nid - start_nid];
+flush_now:
+ new_blkaddr = nat_get_blkaddr(ne);
+
+ raw_ne.ino = cpu_to_le32(nat_get_ino(ne));
+ raw_ne.block_addr = cpu_to_le32(new_blkaddr);
+ raw_ne.version = nat_get_version(ne);
+
+ if (offset < 0) {
+ nat_blk->entries[nid - start_nid] = raw_ne;
+ } else {
+ nat_in_journal(sum, offset) = raw_ne;
+ nid_in_journal(sum, offset) = cpu_to_le32(nid);
+ }
+
+ if (nat_get_blkaddr(ne) == NULL_ADDR) {
+ write_lock(&nm_i->nat_tree_lock);
+ __del_from_nat_cache(nm_i, ne);
+ write_unlock(&nm_i->nat_tree_lock);
+
+ /* We can reuse this freed nid at this point */
+ add_free_nid(NM_I(sbi), nid);
+ } else {
+ write_lock(&nm_i->nat_tree_lock);
+ __clear_nat_cache_dirty(nm_i, ne);
+ ne->checkpointed = true;
+ write_unlock(&nm_i->nat_tree_lock);
+ }
+ }
+ if (!flushed)
+ mutex_unlock(&curseg->curseg_mutex);
+ f2fs_put_page(page, 1);
+
+ /* 2) shrink nat caches if necessary */
+ try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD);
+}
+
+static int init_node_manager(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi);
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ unsigned char *version_bitmap;
+ unsigned int nat_segs, nat_blocks;
+
+ nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr);
+
+ /* segment_count_nat includes pair segment so divide to 2. */
+ nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1;
+ nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg);
+ nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks;
+ nm_i->fcnt = 0;
+ nm_i->nat_cnt = 0;
+
+ INIT_LIST_HEAD(&nm_i->free_nid_list);
+ INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC);
+ INIT_LIST_HEAD(&nm_i->nat_entries);
+ INIT_LIST_HEAD(&nm_i->dirty_nat_entries);
+
+ mutex_init(&nm_i->build_lock);
+ spin_lock_init(&nm_i->free_nid_list_lock);
+ rwlock_init(&nm_i->nat_tree_lock);
+
+ nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP);
+ nm_i->init_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
+ nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid);
+
+ nm_i->nat_bitmap = kzalloc(nm_i->bitmap_size, GFP_KERNEL);
+ if (!nm_i->nat_bitmap)
+ return -ENOMEM;
+ version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP);
+ if (!version_bitmap)
+ return -EFAULT;
+
+ /* copy version bitmap */
+ memcpy(nm_i->nat_bitmap, version_bitmap, nm_i->bitmap_size);
+ return 0;
+}
+
+int build_node_manager(struct f2fs_sb_info *sbi)
+{
+ int err;
+
+ sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL);
+ if (!sbi->nm_info)
+ return -ENOMEM;
+
+ err = init_node_manager(sbi);
+ if (err)
+ return err;
+
+ build_free_nids(sbi);
+ return 0;
+}
+
+void destroy_node_manager(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct free_nid *i, *next_i;
+ struct nat_entry *natvec[NATVEC_SIZE];
+ nid_t nid = 0;
+ unsigned int found;
+
+ if (!nm_i)
+ return;
+
+ /* destroy free nid list */
+ spin_lock(&nm_i->free_nid_list_lock);
+ list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) {
+ BUG_ON(i->state == NID_ALLOC);
+ __del_from_free_nid_list(i);
+ nm_i->fcnt--;
+ }
+ BUG_ON(nm_i->fcnt);
+ spin_unlock(&nm_i->free_nid_list_lock);
+
+ /* destroy nat cache */
+ write_lock(&nm_i->nat_tree_lock);
+ while ((found = __gang_lookup_nat_cache(nm_i,
+ nid, NATVEC_SIZE, natvec))) {
+ unsigned idx;
+ for (idx = 0; idx < found; idx++) {
+ struct nat_entry *e = natvec[idx];
+ nid = nat_get_nid(e) + 1;
+ __del_from_nat_cache(nm_i, e);
+ }
+ }
+ BUG_ON(nm_i->nat_cnt);
+ write_unlock(&nm_i->nat_tree_lock);
+
+ kfree(nm_i->nat_bitmap);
+ sbi->nm_info = NULL;
+ kfree(nm_i);
+}
+
+int __init create_node_manager_caches(void)
+{
+ nat_entry_slab = f2fs_kmem_cache_create("nat_entry",
+ sizeof(struct nat_entry), NULL);
+ if (!nat_entry_slab)
+ return -ENOMEM;
+
+ free_nid_slab = f2fs_kmem_cache_create("free_nid",
+ sizeof(struct free_nid), NULL);
+ if (!free_nid_slab) {
+ kmem_cache_destroy(nat_entry_slab);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void destroy_node_manager_caches(void)
+{
+ kmem_cache_destroy(free_nid_slab);
+ kmem_cache_destroy(nat_entry_slab);
+}
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
new file mode 100644
index 000000000000..afdb130f782e
--- /dev/null
+++ b/fs/f2fs/node.h
@@ -0,0 +1,353 @@
+/*
+ * fs/f2fs/node.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/* start node id of a node block dedicated to the given node id */
+#define START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)
+
+/* node block offset on the NAT area dedicated to the given start node id */
+#define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)
+
+/* # of pages to perform readahead before building free nids */
+#define FREE_NID_PAGES 4
+
+/* maximum # of free node ids to produce during build_free_nids */
+#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
+
+/* maximum readahead size for node during getting data blocks */
+#define MAX_RA_NODE 128
+
+/* maximum cached nat entries to manage memory footprint */
+#define NM_WOUT_THRESHOLD (64 * NAT_ENTRY_PER_BLOCK)
+
+/* vector size for gang look-up from nat cache that consists of radix tree */
+#define NATVEC_SIZE 64
+
+/*
+ * For node information
+ */
+struct node_info {
+ nid_t nid; /* node id */
+ nid_t ino; /* inode number of the node's owner */
+ block_t blk_addr; /* block address of the node */
+ unsigned char version; /* version of the node */
+};
+
+struct nat_entry {
+ struct list_head list; /* for clean or dirty nat list */
+ bool checkpointed; /* whether it is checkpointed or not */
+ struct node_info ni; /* in-memory node information */
+};
+
+#define nat_get_nid(nat) (nat->ni.nid)
+#define nat_set_nid(nat, n) (nat->ni.nid = n)
+#define nat_get_blkaddr(nat) (nat->ni.blk_addr)
+#define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
+#define nat_get_ino(nat) (nat->ni.ino)
+#define nat_set_ino(nat, i) (nat->ni.ino = i)
+#define nat_get_version(nat) (nat->ni.version)
+#define nat_set_version(nat, v) (nat->ni.version = v)
+
+#define __set_nat_cache_dirty(nm_i, ne) \
+ list_move_tail(&ne->list, &nm_i->dirty_nat_entries);
+#define __clear_nat_cache_dirty(nm_i, ne) \
+ list_move_tail(&ne->list, &nm_i->nat_entries);
+#define inc_node_version(version) (++version)
+
+static inline void node_info_from_raw_nat(struct node_info *ni,
+ struct f2fs_nat_entry *raw_ne)
+{
+ ni->ino = le32_to_cpu(raw_ne->ino);
+ ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
+ ni->version = raw_ne->version;
+}
+
+/*
+ * For free nid mangement
+ */
+enum nid_state {
+ NID_NEW, /* newly added to free nid list */
+ NID_ALLOC /* it is allocated */
+};
+
+struct free_nid {
+ struct list_head list; /* for free node id list */
+ nid_t nid; /* node id */
+ int state; /* in use or not: NID_NEW or NID_ALLOC */
+};
+
+static inline int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ struct free_nid *fnid;
+
+ if (nm_i->fcnt <= 0)
+ return -1;
+ spin_lock(&nm_i->free_nid_list_lock);
+ fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
+ *nid = fnid->nid;
+ spin_unlock(&nm_i->free_nid_list_lock);
+ return 0;
+}
+
+/*
+ * inline functions
+ */
+static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
+}
+
+static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ pgoff_t block_off;
+ pgoff_t block_addr;
+ int seg_off;
+
+ block_off = NAT_BLOCK_OFFSET(start);
+ seg_off = block_off >> sbi->log_blocks_per_seg;
+
+ block_addr = (pgoff_t)(nm_i->nat_blkaddr +
+ (seg_off << sbi->log_blocks_per_seg << 1) +
+ (block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
+
+ if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
+ block_addr += sbi->blocks_per_seg;
+
+ return block_addr;
+}
+
+static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
+ pgoff_t block_addr)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+
+ block_addr -= nm_i->nat_blkaddr;
+ if ((block_addr >> sbi->log_blocks_per_seg) % 2)
+ block_addr -= sbi->blocks_per_seg;
+ else
+ block_addr += sbi->blocks_per_seg;
+
+ return block_addr + nm_i->nat_blkaddr;
+}
+
+static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
+{
+ unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
+
+ if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
+ f2fs_clear_bit(block_off, nm_i->nat_bitmap);
+ else
+ f2fs_set_bit(block_off, nm_i->nat_bitmap);
+}
+
+static inline void fill_node_footer(struct page *page, nid_t nid,
+ nid_t ino, unsigned int ofs, bool reset)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ if (reset)
+ memset(rn, 0, sizeof(*rn));
+ rn->footer.nid = cpu_to_le32(nid);
+ rn->footer.ino = cpu_to_le32(ino);
+ rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
+}
+
+static inline void copy_node_footer(struct page *dst, struct page *src)
+{
+ void *src_addr = page_address(src);
+ void *dst_addr = page_address(dst);
+ struct f2fs_node *src_rn = (struct f2fs_node *)src_addr;
+ struct f2fs_node *dst_rn = (struct f2fs_node *)dst_addr;
+ memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
+}
+
+static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ rn->footer.cp_ver = ckpt->checkpoint_ver;
+ rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
+}
+
+static inline nid_t ino_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le32_to_cpu(rn->footer.ino);
+}
+
+static inline nid_t nid_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le32_to_cpu(rn->footer.nid);
+}
+
+static inline unsigned int ofs_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned flag = le32_to_cpu(rn->footer.flag);
+ return flag >> OFFSET_BIT_SHIFT;
+}
+
+static inline unsigned long long cpver_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le64_to_cpu(rn->footer.cp_ver);
+}
+
+static inline block_t next_blkaddr_of_node(struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ return le32_to_cpu(rn->footer.next_blkaddr);
+}
+
+/*
+ * f2fs assigns the following node offsets described as (num).
+ * N = NIDS_PER_BLOCK
+ *
+ * Inode block (0)
+ * |- direct node (1)
+ * |- direct node (2)
+ * |- indirect node (3)
+ * | `- direct node (4 => 4 + N - 1)
+ * |- indirect node (4 + N)
+ * | `- direct node (5 + N => 5 + 2N - 1)
+ * `- double indirect node (5 + 2N)
+ * `- indirect node (6 + 2N)
+ * `- direct node (x(N + 1))
+ */
+static inline bool IS_DNODE(struct page *node_page)
+{
+ unsigned int ofs = ofs_of_node(node_page);
+ if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
+ ofs == 5 + 2 * NIDS_PER_BLOCK)
+ return false;
+ if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
+ ofs -= 6 + 2 * NIDS_PER_BLOCK;
+ if ((long int)ofs % (NIDS_PER_BLOCK + 1))
+ return false;
+ }
+ return true;
+}
+
+static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
+{
+ struct f2fs_node *rn = (struct f2fs_node *)page_address(p);
+
+ wait_on_page_writeback(p);
+
+ if (i)
+ rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
+ else
+ rn->in.nid[off] = cpu_to_le32(nid);
+ set_page_dirty(p);
+}
+
+static inline nid_t get_nid(struct page *p, int off, bool i)
+{
+ struct f2fs_node *rn = (struct f2fs_node *)page_address(p);
+ if (i)
+ return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
+ return le32_to_cpu(rn->in.nid[off]);
+}
+
+/*
+ * Coldness identification:
+ * - Mark cold files in f2fs_inode_info
+ * - Mark cold node blocks in their node footer
+ * - Mark cold data pages in page cache
+ */
+static inline int is_cold_file(struct inode *inode)
+{
+ return F2FS_I(inode)->i_advise & FADVISE_COLD_BIT;
+}
+
+static inline int is_cold_data(struct page *page)
+{
+ return PageChecked(page);
+}
+
+static inline void set_cold_data(struct page *page)
+{
+ SetPageChecked(page);
+}
+
+static inline void clear_cold_data(struct page *page)
+{
+ ClearPageChecked(page);
+}
+
+static inline int is_cold_node(struct page *page)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ return flag & (0x1 << COLD_BIT_SHIFT);
+}
+
+static inline unsigned char is_fsync_dnode(struct page *page)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ return flag & (0x1 << FSYNC_BIT_SHIFT);
+}
+
+static inline unsigned char is_dent_dnode(struct page *page)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ return flag & (0x1 << DENT_BIT_SHIFT);
+}
+
+static inline void set_cold_node(struct inode *inode, struct page *page)
+{
+ struct f2fs_node *rn = (struct f2fs_node *)page_address(page);
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+
+ if (S_ISDIR(inode->i_mode))
+ flag &= ~(0x1 << COLD_BIT_SHIFT);
+ else
+ flag |= (0x1 << COLD_BIT_SHIFT);
+ rn->footer.flag = cpu_to_le32(flag);
+}
+
+static inline void set_fsync_mark(struct page *page, int mark)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ if (mark)
+ flag |= (0x1 << FSYNC_BIT_SHIFT);
+ else
+ flag &= ~(0x1 << FSYNC_BIT_SHIFT);
+ rn->footer.flag = cpu_to_le32(flag);
+}
+
+static inline void set_dentry_mark(struct page *page, int mark)
+{
+ void *kaddr = page_address(page);
+ struct f2fs_node *rn = (struct f2fs_node *)kaddr;
+ unsigned int flag = le32_to_cpu(rn->footer.flag);
+ if (mark)
+ flag |= (0x1 << DENT_BIT_SHIFT);
+ else
+ flag &= ~(0x1 << DENT_BIT_SHIFT);
+ rn->footer.flag = cpu_to_le32(flag);
+}
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
new file mode 100644
index 000000000000..f42e4060b399
--- /dev/null
+++ b/fs/f2fs/recovery.c
@@ -0,0 +1,377 @@
+/*
+ * fs/f2fs/recovery.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+
+static struct kmem_cache *fsync_entry_slab;
+
+bool space_for_roll_forward(struct f2fs_sb_info *sbi)
+{
+ if (sbi->last_valid_block_count + sbi->alloc_valid_block_count
+ > sbi->user_block_count)
+ return false;
+ return true;
+}
+
+static struct fsync_inode_entry *get_fsync_inode(struct list_head *head,
+ nid_t ino)
+{
+ struct list_head *this;
+ struct fsync_inode_entry *entry;
+
+ list_for_each(this, head) {
+ entry = list_entry(this, struct fsync_inode_entry, list);
+ if (entry->inode->i_ino == ino)
+ return entry;
+ }
+ return NULL;
+}
+
+static int recover_dentry(struct page *ipage, struct inode *inode)
+{
+ struct f2fs_node *raw_node = (struct f2fs_node *)kmap(ipage);
+ struct f2fs_inode *raw_inode = &(raw_node->i);
+ struct dentry dent, parent;
+ struct f2fs_dir_entry *de;
+ struct page *page;
+ struct inode *dir;
+ int err = 0;
+
+ if (!is_dent_dnode(ipage))
+ goto out;
+
+ dir = f2fs_iget(inode->i_sb, le32_to_cpu(raw_inode->i_pino));
+ if (IS_ERR(dir)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ parent.d_inode = dir;
+ dent.d_parent = &parent;
+ dent.d_name.len = le32_to_cpu(raw_inode->i_namelen);
+ dent.d_name.name = raw_inode->i_name;
+
+ de = f2fs_find_entry(dir, &dent.d_name, &page);
+ if (de) {
+ kunmap(page);
+ f2fs_put_page(page, 0);
+ } else {
+ err = f2fs_add_link(&dent, inode);
+ }
+ iput(dir);
+out:
+ kunmap(ipage);
+ return err;
+}
+
+static int recover_inode(struct inode *inode, struct page *node_page)
+{
+ void *kaddr = page_address(node_page);
+ struct f2fs_node *raw_node = (struct f2fs_node *)kaddr;
+ struct f2fs_inode *raw_inode = &(raw_node->i);
+
+ inode->i_mode = le16_to_cpu(raw_inode->i_mode);
+ i_size_write(inode, le64_to_cpu(raw_inode->i_size));
+ inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
+ inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
+ inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
+ inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
+ inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
+ inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
+
+ return recover_dentry(node_page, inode);
+}
+
+static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
+{
+ unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver);
+ struct curseg_info *curseg;
+ struct page *page;
+ block_t blkaddr;
+ int err = 0;
+
+ /* get node pages in the current segment */
+ curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
+ blkaddr = START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff;
+
+ /* read node page */
+ page = alloc_page(GFP_F2FS_ZERO);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
+ lock_page(page);
+
+ while (1) {
+ struct fsync_inode_entry *entry;
+
+ if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC))
+ goto out;
+
+ if (cp_ver != cpver_of_node(page))
+ goto out;
+
+ if (!is_fsync_dnode(page))
+ goto next;
+
+ entry = get_fsync_inode(head, ino_of_node(page));
+ if (entry) {
+ entry->blkaddr = blkaddr;
+ if (IS_INODE(page) && is_dent_dnode(page))
+ set_inode_flag(F2FS_I(entry->inode),
+ FI_INC_LINK);
+ } else {
+ if (IS_INODE(page) && is_dent_dnode(page)) {
+ if (recover_inode_page(sbi, page)) {
+ err = -ENOMEM;
+ goto out;
+ }
+ }
+
+ /* add this fsync inode to the list */
+ entry = kmem_cache_alloc(fsync_entry_slab, GFP_NOFS);
+ if (!entry) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ entry->inode = f2fs_iget(sbi->sb, ino_of_node(page));
+ if (IS_ERR(entry->inode)) {
+ err = PTR_ERR(entry->inode);
+ kmem_cache_free(fsync_entry_slab, entry);
+ goto out;
+ }
+
+ list_add_tail(&entry->list, head);
+ entry->blkaddr = blkaddr;
+ }
+ if (IS_INODE(page)) {
+ err = recover_inode(entry->inode, page);
+ if (err)
+ goto out;
+ }
+next:
+ /* check next segment */
+ blkaddr = next_blkaddr_of_node(page);
+ ClearPageUptodate(page);
+ }
+out:
+ unlock_page(page);
+ __free_pages(page, 0);
+ return err;
+}
+
+static void destroy_fsync_dnodes(struct f2fs_sb_info *sbi,
+ struct list_head *head)
+{
+ struct fsync_inode_entry *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, head, list) {
+ iput(entry->inode);
+ list_del(&entry->list);
+ kmem_cache_free(fsync_entry_slab, entry);
+ }
+}
+
+static void check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
+ block_t blkaddr)
+{
+ struct seg_entry *sentry;
+ unsigned int segno = GET_SEGNO(sbi, blkaddr);
+ unsigned short blkoff = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) &
+ (sbi->blocks_per_seg - 1);
+ struct f2fs_summary sum;
+ nid_t ino;
+ void *kaddr;
+ struct inode *inode;
+ struct page *node_page;
+ block_t bidx;
+ int i;
+
+ sentry = get_seg_entry(sbi, segno);
+ if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
+ return;
+
+ /* Get the previous summary */
+ for (i = CURSEG_WARM_DATA; i <= CURSEG_COLD_DATA; i++) {
+ struct curseg_info *curseg = CURSEG_I(sbi, i);
+ if (curseg->segno == segno) {
+ sum = curseg->sum_blk->entries[blkoff];
+ break;
+ }
+ }
+ if (i > CURSEG_COLD_DATA) {
+ struct page *sum_page = get_sum_page(sbi, segno);
+ struct f2fs_summary_block *sum_node;
+ kaddr = page_address(sum_page);
+ sum_node = (struct f2fs_summary_block *)kaddr;
+ sum = sum_node->entries[blkoff];
+ f2fs_put_page(sum_page, 1);
+ }
+
+ /* Get the node page */
+ node_page = get_node_page(sbi, le32_to_cpu(sum.nid));
+ bidx = start_bidx_of_node(ofs_of_node(node_page)) +
+ le16_to_cpu(sum.ofs_in_node);
+ ino = ino_of_node(node_page);
+ f2fs_put_page(node_page, 1);
+
+ /* Deallocate previous index in the node page */
+ inode = f2fs_iget_nowait(sbi->sb, ino);
+ if (IS_ERR(inode))
+ return;
+
+ truncate_hole(inode, bidx, bidx + 1);
+ iput(inode);
+}
+
+static void do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
+ struct page *page, block_t blkaddr)
+{
+ unsigned int start, end;
+ struct dnode_of_data dn;
+ struct f2fs_summary sum;
+ struct node_info ni;
+
+ start = start_bidx_of_node(ofs_of_node(page));
+ if (IS_INODE(page))
+ end = start + ADDRS_PER_INODE;
+ else
+ end = start + ADDRS_PER_BLOCK;
+
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ if (get_dnode_of_data(&dn, start, 0))
+ return;
+
+ wait_on_page_writeback(dn.node_page);
+
+ get_node_info(sbi, dn.nid, &ni);
+ BUG_ON(ni.ino != ino_of_node(page));
+ BUG_ON(ofs_of_node(dn.node_page) != ofs_of_node(page));
+
+ for (; start < end; start++) {
+ block_t src, dest;
+
+ src = datablock_addr(dn.node_page, dn.ofs_in_node);
+ dest = datablock_addr(page, dn.ofs_in_node);
+
+ if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR) {
+ if (src == NULL_ADDR) {
+ int err = reserve_new_block(&dn);
+ /* We should not get -ENOSPC */
+ BUG_ON(err);
+ }
+
+ /* Check the previous node page having this index */
+ check_index_in_prev_nodes(sbi, dest);
+
+ set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
+
+ /* write dummy data page */
+ recover_data_page(sbi, NULL, &sum, src, dest);
+ update_extent_cache(dest, &dn);
+ }
+ dn.ofs_in_node++;
+ }
+
+ /* write node page in place */
+ set_summary(&sum, dn.nid, 0, 0);
+ if (IS_INODE(dn.node_page))
+ sync_inode_page(&dn);
+
+ copy_node_footer(dn.node_page, page);
+ fill_node_footer(dn.node_page, dn.nid, ni.ino,
+ ofs_of_node(page), false);
+ set_page_dirty(dn.node_page);
+
+ recover_node_page(sbi, dn.node_page, &sum, &ni, blkaddr);
+ f2fs_put_dnode(&dn);
+}
+
+static void recover_data(struct f2fs_sb_info *sbi,
+ struct list_head *head, int type)
+{
+ unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver);
+ struct curseg_info *curseg;
+ struct page *page;
+ block_t blkaddr;
+
+ /* get node pages in the current segment */
+ curseg = CURSEG_I(sbi, type);
+ blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
+
+ /* read node page */
+ page = alloc_page(GFP_NOFS | __GFP_ZERO);
+ if (IS_ERR(page))
+ return;
+ lock_page(page);
+
+ while (1) {
+ struct fsync_inode_entry *entry;
+
+ if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC))
+ goto out;
+
+ if (cp_ver != cpver_of_node(page))
+ goto out;
+
+ entry = get_fsync_inode(head, ino_of_node(page));
+ if (!entry)
+ goto next;
+
+ do_recover_data(sbi, entry->inode, page, blkaddr);
+
+ if (entry->blkaddr == blkaddr) {
+ iput(entry->inode);
+ list_del(&entry->list);
+ kmem_cache_free(fsync_entry_slab, entry);
+ }
+next:
+ /* check next segment */
+ blkaddr = next_blkaddr_of_node(page);
+ ClearPageUptodate(page);
+ }
+out:
+ unlock_page(page);
+ __free_pages(page, 0);
+
+ allocate_new_segments(sbi);
+}
+
+void recover_fsync_data(struct f2fs_sb_info *sbi)
+{
+ struct list_head inode_list;
+
+ fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
+ sizeof(struct fsync_inode_entry), NULL);
+ if (unlikely(!fsync_entry_slab))
+ return;
+
+ INIT_LIST_HEAD(&inode_list);
+
+ /* step #1: find fsynced inode numbers */
+ if (find_fsync_dnodes(sbi, &inode_list))
+ goto out;
+
+ if (list_empty(&inode_list))
+ goto out;
+
+ /* step #2: recover data */
+ sbi->por_doing = 1;
+ recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
+ sbi->por_doing = 0;
+ BUG_ON(!list_empty(&inode_list));
+out:
+ destroy_fsync_dnodes(sbi, &inode_list);
+ kmem_cache_destroy(fsync_entry_slab);
+ write_checkpoint(sbi, false, false);
+}
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
new file mode 100644
index 000000000000..4b0099066582
--- /dev/null
+++ b/fs/f2fs/segment.c
@@ -0,0 +1,1757 @@
+/*
+ * fs/f2fs/segment.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/bio.h>
+#include <linux/blkdev.h>
+#include <linux/prefetch.h>
+#include <linux/vmalloc.h>
+
+#include "f2fs.h"
+#include "segment.h"
+#include "node.h"
+
+/*
+ * This function balances dirty node and dentry pages.
+ * In addition, it controls garbage collection.
+ */
+void f2fs_balance_fs(struct f2fs_sb_info *sbi)
+{
+ /*
+ * We should do GC or end up with checkpoint, if there are so many dirty
+ * dir/node pages without enough free segments.
+ */
+ if (has_not_enough_free_secs(sbi)) {
+ mutex_lock(&sbi->gc_mutex);
+ f2fs_gc(sbi);
+ }
+}
+
+static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
+ enum dirty_type dirty_type)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+
+ /* need not be added */
+ if (IS_CURSEG(sbi, segno))
+ return;
+
+ if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
+ dirty_i->nr_dirty[dirty_type]++;
+
+ if (dirty_type == DIRTY) {
+ struct seg_entry *sentry = get_seg_entry(sbi, segno);
+ dirty_type = sentry->type;
+ if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
+ dirty_i->nr_dirty[dirty_type]++;
+ }
+}
+
+static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
+ enum dirty_type dirty_type)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+
+ if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
+ dirty_i->nr_dirty[dirty_type]--;
+
+ if (dirty_type == DIRTY) {
+ struct seg_entry *sentry = get_seg_entry(sbi, segno);
+ dirty_type = sentry->type;
+ if (test_and_clear_bit(segno,
+ dirty_i->dirty_segmap[dirty_type]))
+ dirty_i->nr_dirty[dirty_type]--;
+ clear_bit(segno, dirty_i->victim_segmap[FG_GC]);
+ clear_bit(segno, dirty_i->victim_segmap[BG_GC]);
+ }
+}
+
+/*
+ * Should not occur error such as -ENOMEM.
+ * Adding dirty entry into seglist is not critical operation.
+ * If a given segment is one of current working segments, it won't be added.
+ */
+void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned short valid_blocks;
+
+ if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
+ return;
+
+ mutex_lock(&dirty_i->seglist_lock);
+
+ valid_blocks = get_valid_blocks(sbi, segno, 0);
+
+ if (valid_blocks == 0) {
+ __locate_dirty_segment(sbi, segno, PRE);
+ __remove_dirty_segment(sbi, segno, DIRTY);
+ } else if (valid_blocks < sbi->blocks_per_seg) {
+ __locate_dirty_segment(sbi, segno, DIRTY);
+ } else {
+ /* Recovery routine with SSR needs this */
+ __remove_dirty_segment(sbi, segno, DIRTY);
+ }
+
+ mutex_unlock(&dirty_i->seglist_lock);
+ return;
+}
+
+/*
+ * Should call clear_prefree_segments after checkpoint is done.
+ */
+static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned int segno, offset = 0;
+ unsigned int total_segs = TOTAL_SEGS(sbi);
+
+ mutex_lock(&dirty_i->seglist_lock);
+ while (1) {
+ segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs,
+ offset);
+ if (segno >= total_segs)
+ break;
+ __set_test_and_free(sbi, segno);
+ offset = segno + 1;
+ }
+ mutex_unlock(&dirty_i->seglist_lock);
+}
+
+void clear_prefree_segments(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned int segno, offset = 0;
+ unsigned int total_segs = TOTAL_SEGS(sbi);
+
+ mutex_lock(&dirty_i->seglist_lock);
+ while (1) {
+ segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs,
+ offset);
+ if (segno >= total_segs)
+ break;
+
+ offset = segno + 1;
+ if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE]))
+ dirty_i->nr_dirty[PRE]--;
+
+ /* Let's use trim */
+ if (test_opt(sbi, DISCARD))
+ blkdev_issue_discard(sbi->sb->s_bdev,
+ START_BLOCK(sbi, segno) <<
+ sbi->log_sectors_per_block,
+ 1 << (sbi->log_sectors_per_block +
+ sbi->log_blocks_per_seg),
+ GFP_NOFS, 0);
+ }
+ mutex_unlock(&dirty_i->seglist_lock);
+}
+
+static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap))
+ sit_i->dirty_sentries++;
+}
+
+static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
+ unsigned int segno, int modified)
+{
+ struct seg_entry *se = get_seg_entry(sbi, segno);
+ se->type = type;
+ if (modified)
+ __mark_sit_entry_dirty(sbi, segno);
+}
+
+static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
+{
+ struct seg_entry *se;
+ unsigned int segno, offset;
+ long int new_vblocks;
+
+ segno = GET_SEGNO(sbi, blkaddr);
+
+ se = get_seg_entry(sbi, segno);
+ new_vblocks = se->valid_blocks + del;
+ offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1);
+
+ BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) ||
+ (new_vblocks > sbi->blocks_per_seg)));
+
+ se->valid_blocks = new_vblocks;
+ se->mtime = get_mtime(sbi);
+ SIT_I(sbi)->max_mtime = se->mtime;
+
+ /* Update valid block bitmap */
+ if (del > 0) {
+ if (f2fs_set_bit(offset, se->cur_valid_map))
+ BUG();
+ } else {
+ if (!f2fs_clear_bit(offset, se->cur_valid_map))
+ BUG();
+ }
+ if (!f2fs_test_bit(offset, se->ckpt_valid_map))
+ se->ckpt_valid_blocks += del;
+
+ __mark_sit_entry_dirty(sbi, segno);
+
+ /* update total number of valid blocks to be written in ckpt area */
+ SIT_I(sbi)->written_valid_blocks += del;
+
+ if (sbi->segs_per_sec > 1)
+ get_sec_entry(sbi, segno)->valid_blocks += del;
+}
+
+static void refresh_sit_entry(struct f2fs_sb_info *sbi,
+ block_t old_blkaddr, block_t new_blkaddr)
+{
+ update_sit_entry(sbi, new_blkaddr, 1);
+ if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
+ update_sit_entry(sbi, old_blkaddr, -1);
+}
+
+void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
+{
+ unsigned int segno = GET_SEGNO(sbi, addr);
+ struct sit_info *sit_i = SIT_I(sbi);
+
+ BUG_ON(addr == NULL_ADDR);
+ if (addr == NEW_ADDR)
+ return;
+
+ /* add it into sit main buffer */
+ mutex_lock(&sit_i->sentry_lock);
+
+ update_sit_entry(sbi, addr, -1);
+
+ /* add it into dirty seglist */
+ locate_dirty_segment(sbi, segno);
+
+ mutex_unlock(&sit_i->sentry_lock);
+}
+
+/*
+ * This function should be resided under the curseg_mutex lock
+ */
+static void __add_sum_entry(struct f2fs_sb_info *sbi, int type,
+ struct f2fs_summary *sum, unsigned short offset)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ void *addr = curseg->sum_blk;
+ addr += offset * sizeof(struct f2fs_summary);
+ memcpy(addr, sum, sizeof(struct f2fs_summary));
+ return;
+}
+
+/*
+ * Calculate the number of current summary pages for writing
+ */
+int npages_for_summary_flush(struct f2fs_sb_info *sbi)
+{
+ int total_size_bytes = 0;
+ int valid_sum_count = 0;
+ int i, sum_space;
+
+ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
+ if (sbi->ckpt->alloc_type[i] == SSR)
+ valid_sum_count += sbi->blocks_per_seg;
+ else
+ valid_sum_count += curseg_blkoff(sbi, i);
+ }
+
+ total_size_bytes = valid_sum_count * (SUMMARY_SIZE + 1)
+ + sizeof(struct nat_journal) + 2
+ + sizeof(struct sit_journal) + 2;
+ sum_space = PAGE_CACHE_SIZE - SUM_FOOTER_SIZE;
+ if (total_size_bytes < sum_space)
+ return 1;
+ else if (total_size_bytes < 2 * sum_space)
+ return 2;
+ return 3;
+}
+
+/*
+ * Caller should put this summary page
+ */
+struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
+}
+
+static void write_sum_page(struct f2fs_sb_info *sbi,
+ struct f2fs_summary_block *sum_blk, block_t blk_addr)
+{
+ struct page *page = grab_meta_page(sbi, blk_addr);
+ void *kaddr = page_address(page);
+ memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+}
+
+static unsigned int check_prefree_segments(struct f2fs_sb_info *sbi,
+ int ofs_unit, int type)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned long *prefree_segmap = dirty_i->dirty_segmap[PRE];
+ unsigned int segno, next_segno, i;
+ int ofs = 0;
+
+ /*
+ * If there is not enough reserved sections,
+ * we should not reuse prefree segments.
+ */
+ if (has_not_enough_free_secs(sbi))
+ return NULL_SEGNO;
+
+ /*
+ * NODE page should not reuse prefree segment,
+ * since those information is used for SPOR.
+ */
+ if (IS_NODESEG(type))
+ return NULL_SEGNO;
+next:
+ segno = find_next_bit(prefree_segmap, TOTAL_SEGS(sbi), ofs++);
+ ofs = ((segno / ofs_unit) * ofs_unit) + ofs_unit;
+ if (segno < TOTAL_SEGS(sbi)) {
+ /* skip intermediate segments in a section */
+ if (segno % ofs_unit)
+ goto next;
+
+ /* skip if whole section is not prefree */
+ next_segno = find_next_zero_bit(prefree_segmap,
+ TOTAL_SEGS(sbi), segno + 1);
+ if (next_segno - segno < ofs_unit)
+ goto next;
+
+ /* skip if whole section was not free at the last checkpoint */
+ for (i = 0; i < ofs_unit; i++)
+ if (get_seg_entry(sbi, segno)->ckpt_valid_blocks)
+ goto next;
+ return segno;
+ }
+ return NULL_SEGNO;
+}
+
+/*
+ * Find a new segment from the free segments bitmap to right order
+ * This function should be returned with success, otherwise BUG
+ */
+static void get_new_segment(struct f2fs_sb_info *sbi,
+ unsigned int *newseg, bool new_sec, int dir)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int total_secs = sbi->total_sections;
+ unsigned int segno, secno, zoneno;
+ unsigned int total_zones = sbi->total_sections / sbi->secs_per_zone;
+ unsigned int hint = *newseg / sbi->segs_per_sec;
+ unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg);
+ unsigned int left_start = hint;
+ bool init = true;
+ int go_left = 0;
+ int i;
+
+ write_lock(&free_i->segmap_lock);
+
+ if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) {
+ segno = find_next_zero_bit(free_i->free_segmap,
+ TOTAL_SEGS(sbi), *newseg + 1);
+ if (segno < TOTAL_SEGS(sbi))
+ goto got_it;
+ }
+find_other_zone:
+ secno = find_next_zero_bit(free_i->free_secmap, total_secs, hint);
+ if (secno >= total_secs) {
+ if (dir == ALLOC_RIGHT) {
+ secno = find_next_zero_bit(free_i->free_secmap,
+ total_secs, 0);
+ BUG_ON(secno >= total_secs);
+ } else {
+ go_left = 1;
+ left_start = hint - 1;
+ }
+ }
+ if (go_left == 0)
+ goto skip_left;
+
+ while (test_bit(left_start, free_i->free_secmap)) {
+ if (left_start > 0) {
+ left_start--;
+ continue;
+ }
+ left_start = find_next_zero_bit(free_i->free_secmap,
+ total_secs, 0);
+ BUG_ON(left_start >= total_secs);
+ break;
+ }
+ secno = left_start;
+skip_left:
+ hint = secno;
+ segno = secno * sbi->segs_per_sec;
+ zoneno = secno / sbi->secs_per_zone;
+
+ /* give up on finding another zone */
+ if (!init)
+ goto got_it;
+ if (sbi->secs_per_zone == 1)
+ goto got_it;
+ if (zoneno == old_zoneno)
+ goto got_it;
+ if (dir == ALLOC_LEFT) {
+ if (!go_left && zoneno + 1 >= total_zones)
+ goto got_it;
+ if (go_left && zoneno == 0)
+ goto got_it;
+ }
+ for (i = 0; i < NR_CURSEG_TYPE; i++)
+ if (CURSEG_I(sbi, i)->zone == zoneno)
+ break;
+
+ if (i < NR_CURSEG_TYPE) {
+ /* zone is in user, try another */
+ if (go_left)
+ hint = zoneno * sbi->secs_per_zone - 1;
+ else if (zoneno + 1 >= total_zones)
+ hint = 0;
+ else
+ hint = (zoneno + 1) * sbi->secs_per_zone;
+ init = false;
+ goto find_other_zone;
+ }
+got_it:
+ /* set it as dirty segment in free segmap */
+ BUG_ON(test_bit(segno, free_i->free_segmap));
+ __set_inuse(sbi, segno);
+ *newseg = segno;
+ write_unlock(&free_i->segmap_lock);
+}
+
+static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ struct summary_footer *sum_footer;
+
+ curseg->segno = curseg->next_segno;
+ curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno);
+ curseg->next_blkoff = 0;
+ curseg->next_segno = NULL_SEGNO;
+
+ sum_footer = &(curseg->sum_blk->footer);
+ memset(sum_footer, 0, sizeof(struct summary_footer));
+ if (IS_DATASEG(type))
+ SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
+ if (IS_NODESEG(type))
+ SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
+ __set_sit_entry_type(sbi, type, curseg->segno, modified);
+}
+
+/*
+ * Allocate a current working segment.
+ * This function always allocates a free segment in LFS manner.
+ */
+static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ unsigned int segno = curseg->segno;
+ int dir = ALLOC_LEFT;
+
+ write_sum_page(sbi, curseg->sum_blk,
+ GET_SUM_BLOCK(sbi, curseg->segno));
+ if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
+ dir = ALLOC_RIGHT;
+
+ if (test_opt(sbi, NOHEAP))
+ dir = ALLOC_RIGHT;
+
+ get_new_segment(sbi, &segno, new_sec, dir);
+ curseg->next_segno = segno;
+ reset_curseg(sbi, type, 1);
+ curseg->alloc_type = LFS;
+}
+
+static void __next_free_blkoff(struct f2fs_sb_info *sbi,
+ struct curseg_info *seg, block_t start)
+{
+ struct seg_entry *se = get_seg_entry(sbi, seg->segno);
+ block_t ofs;
+ for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) {
+ if (!f2fs_test_bit(ofs, se->ckpt_valid_map)
+ && !f2fs_test_bit(ofs, se->cur_valid_map))
+ break;
+ }
+ seg->next_blkoff = ofs;
+}
+
+/*
+ * If a segment is written by LFS manner, next block offset is just obtained
+ * by increasing the current block offset. However, if a segment is written by
+ * SSR manner, next block offset obtained by calling __next_free_blkoff
+ */
+static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
+ struct curseg_info *seg)
+{
+ if (seg->alloc_type == SSR)
+ __next_free_blkoff(sbi, seg, seg->next_blkoff + 1);
+ else
+ seg->next_blkoff++;
+}
+
+/*
+ * This function always allocates a used segment (from dirty seglist) by SSR
+ * manner, so it should recover the existing segment information of valid blocks
+ */
+static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ unsigned int new_segno = curseg->next_segno;
+ struct f2fs_summary_block *sum_node;
+ struct page *sum_page;
+
+ write_sum_page(sbi, curseg->sum_blk,
+ GET_SUM_BLOCK(sbi, curseg->segno));
+ __set_test_and_inuse(sbi, new_segno);
+
+ mutex_lock(&dirty_i->seglist_lock);
+ __remove_dirty_segment(sbi, new_segno, PRE);
+ __remove_dirty_segment(sbi, new_segno, DIRTY);
+ mutex_unlock(&dirty_i->seglist_lock);
+
+ reset_curseg(sbi, type, 1);
+ curseg->alloc_type = SSR;
+ __next_free_blkoff(sbi, curseg, 0);
+
+ if (reuse) {
+ sum_page = get_sum_page(sbi, new_segno);
+ sum_node = (struct f2fs_summary_block *)page_address(sum_page);
+ memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
+ f2fs_put_page(sum_page, 1);
+ }
+}
+
+/*
+ * flush out current segment and replace it with new segment
+ * This function should be returned with success, otherwise BUG
+ */
+static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
+ int type, bool force)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ unsigned int ofs_unit;
+
+ if (force) {
+ new_curseg(sbi, type, true);
+ goto out;
+ }
+
+ ofs_unit = need_SSR(sbi) ? 1 : sbi->segs_per_sec;
+ curseg->next_segno = check_prefree_segments(sbi, ofs_unit, type);
+
+ if (curseg->next_segno != NULL_SEGNO)
+ change_curseg(sbi, type, false);
+ else if (type == CURSEG_WARM_NODE)
+ new_curseg(sbi, type, false);
+ else if (need_SSR(sbi) && get_ssr_segment(sbi, type))
+ change_curseg(sbi, type, true);
+ else
+ new_curseg(sbi, type, false);
+out:
+ sbi->segment_count[curseg->alloc_type]++;
+}
+
+void allocate_new_segments(struct f2fs_sb_info *sbi)
+{
+ struct curseg_info *curseg;
+ unsigned int old_curseg;
+ int i;
+
+ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
+ curseg = CURSEG_I(sbi, i);
+ old_curseg = curseg->segno;
+ SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true);
+ locate_dirty_segment(sbi, old_curseg);
+ }
+}
+
+static const struct segment_allocation default_salloc_ops = {
+ .allocate_segment = allocate_segment_by_default,
+};
+
+static void f2fs_end_io_write(struct bio *bio, int err)
+{
+ const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
+ struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
+ struct bio_private *p = bio->bi_private;
+
+ do {
+ struct page *page = bvec->bv_page;
+
+ if (--bvec >= bio->bi_io_vec)
+ prefetchw(&bvec->bv_page->flags);
+ if (!uptodate) {
+ SetPageError(page);
+ if (page->mapping)
+ set_bit(AS_EIO, &page->mapping->flags);
+ set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG);
+ }
+ end_page_writeback(page);
+ dec_page_count(p->sbi, F2FS_WRITEBACK);
+ } while (bvec >= bio->bi_io_vec);
+
+ if (p->is_sync)
+ complete(p->wait);
+ kfree(p);
+ bio_put(bio);
+}
+
+struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages)
+{
+ struct bio *bio;
+ struct bio_private *priv;
+retry:
+ priv = kmalloc(sizeof(struct bio_private), GFP_NOFS);
+ if (!priv) {
+ cond_resched();
+ goto retry;
+ }
+
+ /* No failure on bio allocation */
+ bio = bio_alloc(GFP_NOIO, npages);
+ bio->bi_bdev = bdev;
+ bio->bi_private = priv;
+ return bio;
+}
+
+static void do_submit_bio(struct f2fs_sb_info *sbi,
+ enum page_type type, bool sync)
+{
+ int rw = sync ? WRITE_SYNC : WRITE;
+ enum page_type btype = type > META ? META : type;
+
+ if (type >= META_FLUSH)
+ rw = WRITE_FLUSH_FUA;
+
+ if (sbi->bio[btype]) {
+ struct bio_private *p = sbi->bio[btype]->bi_private;
+ p->sbi = sbi;
+ sbi->bio[btype]->bi_end_io = f2fs_end_io_write;
+ if (type == META_FLUSH) {
+ DECLARE_COMPLETION_ONSTACK(wait);
+ p->is_sync = true;
+ p->wait = &wait;
+ submit_bio(rw, sbi->bio[btype]);
+ wait_for_completion(&wait);
+ } else {
+ p->is_sync = false;
+ submit_bio(rw, sbi->bio[btype]);
+ }
+ sbi->bio[btype] = NULL;
+ }
+}
+
+void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync)
+{
+ down_write(&sbi->bio_sem);
+ do_submit_bio(sbi, type, sync);
+ up_write(&sbi->bio_sem);
+}
+
+static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t blk_addr, enum page_type type)
+{
+ struct block_device *bdev = sbi->sb->s_bdev;
+
+ verify_block_addr(sbi, blk_addr);
+
+ down_write(&sbi->bio_sem);
+
+ inc_page_count(sbi, F2FS_WRITEBACK);
+
+ if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1)
+ do_submit_bio(sbi, type, false);
+alloc_new:
+ if (sbi->bio[type] == NULL) {
+ sbi->bio[type] = f2fs_bio_alloc(bdev, bio_get_nr_vecs(bdev));
+ sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr);
+ /*
+ * The end_io will be assigned at the sumbission phase.
+ * Until then, let bio_add_page() merge consecutive IOs as much
+ * as possible.
+ */
+ }
+
+ if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) <
+ PAGE_CACHE_SIZE) {
+ do_submit_bio(sbi, type, false);
+ goto alloc_new;
+ }
+
+ sbi->last_block_in_bio[type] = blk_addr;
+
+ up_write(&sbi->bio_sem);
+}
+
+static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ if (curseg->next_blkoff < sbi->blocks_per_seg)
+ return true;
+ return false;
+}
+
+static int __get_segment_type_2(struct page *page, enum page_type p_type)
+{
+ if (p_type == DATA)
+ return CURSEG_HOT_DATA;
+ else
+ return CURSEG_HOT_NODE;
+}
+
+static int __get_segment_type_4(struct page *page, enum page_type p_type)
+{
+ if (p_type == DATA) {
+ struct inode *inode = page->mapping->host;
+
+ if (S_ISDIR(inode->i_mode))
+ return CURSEG_HOT_DATA;
+ else
+ return CURSEG_COLD_DATA;
+ } else {
+ if (IS_DNODE(page) && !is_cold_node(page))
+ return CURSEG_HOT_NODE;
+ else
+ return CURSEG_COLD_NODE;
+ }
+}
+
+static int __get_segment_type_6(struct page *page, enum page_type p_type)
+{
+ if (p_type == DATA) {
+ struct inode *inode = page->mapping->host;
+
+ if (S_ISDIR(inode->i_mode))
+ return CURSEG_HOT_DATA;
+ else if (is_cold_data(page) || is_cold_file(inode))
+ return CURSEG_COLD_DATA;
+ else
+ return CURSEG_WARM_DATA;
+ } else {
+ if (IS_DNODE(page))
+ return is_cold_node(page) ? CURSEG_WARM_NODE :
+ CURSEG_HOT_NODE;
+ else
+ return CURSEG_COLD_NODE;
+ }
+}
+
+static int __get_segment_type(struct page *page, enum page_type p_type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb);
+ switch (sbi->active_logs) {
+ case 2:
+ return __get_segment_type_2(page, p_type);
+ case 4:
+ return __get_segment_type_4(page, p_type);
+ }
+ /* NR_CURSEG_TYPE(6) logs by default */
+ BUG_ON(sbi->active_logs != NR_CURSEG_TYPE);
+ return __get_segment_type_6(page, p_type);
+}
+
+static void do_write_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t old_blkaddr, block_t *new_blkaddr,
+ struct f2fs_summary *sum, enum page_type p_type)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct curseg_info *curseg;
+ unsigned int old_cursegno;
+ int type;
+
+ type = __get_segment_type(page, p_type);
+ curseg = CURSEG_I(sbi, type);
+
+ mutex_lock(&curseg->curseg_mutex);
+
+ *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
+ old_cursegno = curseg->segno;
+
+ /*
+ * __add_sum_entry should be resided under the curseg_mutex
+ * because, this function updates a summary entry in the
+ * current summary block.
+ */
+ __add_sum_entry(sbi, type, sum, curseg->next_blkoff);
+
+ mutex_lock(&sit_i->sentry_lock);
+ __refresh_next_blkoff(sbi, curseg);
+ sbi->block_count[curseg->alloc_type]++;
+
+ /*
+ * SIT information should be updated before segment allocation,
+ * since SSR needs latest valid block information.
+ */
+ refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr);
+
+ if (!__has_curseg_space(sbi, type))
+ sit_i->s_ops->allocate_segment(sbi, type, false);
+
+ locate_dirty_segment(sbi, old_cursegno);
+ locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
+ mutex_unlock(&sit_i->sentry_lock);
+
+ if (p_type == NODE)
+ fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
+
+ /* writeout dirty page into bdev */
+ submit_write_page(sbi, page, *new_blkaddr, p_type);
+
+ mutex_unlock(&curseg->curseg_mutex);
+}
+
+int write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
+ struct writeback_control *wbc)
+{
+ if (wbc->for_reclaim)
+ return AOP_WRITEPAGE_ACTIVATE;
+
+ set_page_writeback(page);
+ submit_write_page(sbi, page, page->index, META);
+ return 0;
+}
+
+void write_node_page(struct f2fs_sb_info *sbi, struct page *page,
+ unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr)
+{
+ struct f2fs_summary sum;
+ set_summary(&sum, nid, 0, 0);
+ do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE);
+}
+
+void write_data_page(struct inode *inode, struct page *page,
+ struct dnode_of_data *dn, block_t old_blkaddr,
+ block_t *new_blkaddr)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_summary sum;
+ struct node_info ni;
+
+ BUG_ON(old_blkaddr == NULL_ADDR);
+ get_node_info(sbi, dn->nid, &ni);
+ set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
+
+ do_write_page(sbi, page, old_blkaddr,
+ new_blkaddr, &sum, DATA);
+}
+
+void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page,
+ block_t old_blk_addr)
+{
+ submit_write_page(sbi, page, old_blk_addr, DATA);
+}
+
+void recover_data_page(struct f2fs_sb_info *sbi,
+ struct page *page, struct f2fs_summary *sum,
+ block_t old_blkaddr, block_t new_blkaddr)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct curseg_info *curseg;
+ unsigned int segno, old_cursegno;
+ struct seg_entry *se;
+ int type;
+
+ segno = GET_SEGNO(sbi, new_blkaddr);
+ se = get_seg_entry(sbi, segno);
+ type = se->type;
+
+ if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
+ if (old_blkaddr == NULL_ADDR)
+ type = CURSEG_COLD_DATA;
+ else
+ type = CURSEG_WARM_DATA;
+ }
+ curseg = CURSEG_I(sbi, type);
+
+ mutex_lock(&curseg->curseg_mutex);
+ mutex_lock(&sit_i->sentry_lock);
+
+ old_cursegno = curseg->segno;
+
+ /* change the current segment */
+ if (segno != curseg->segno) {
+ curseg->next_segno = segno;
+ change_curseg(sbi, type, true);
+ }
+
+ curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) &
+ (sbi->blocks_per_seg - 1);
+ __add_sum_entry(sbi, type, sum, curseg->next_blkoff);
+
+ refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
+
+ locate_dirty_segment(sbi, old_cursegno);
+ locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
+
+ mutex_unlock(&sit_i->sentry_lock);
+ mutex_unlock(&curseg->curseg_mutex);
+}
+
+void rewrite_node_page(struct f2fs_sb_info *sbi,
+ struct page *page, struct f2fs_summary *sum,
+ block_t old_blkaddr, block_t new_blkaddr)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ int type = CURSEG_WARM_NODE;
+ struct curseg_info *curseg;
+ unsigned int segno, old_cursegno;
+ block_t next_blkaddr = next_blkaddr_of_node(page);
+ unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr);
+
+ curseg = CURSEG_I(sbi, type);
+
+ mutex_lock(&curseg->curseg_mutex);
+ mutex_lock(&sit_i->sentry_lock);
+
+ segno = GET_SEGNO(sbi, new_blkaddr);
+ old_cursegno = curseg->segno;
+
+ /* change the current segment */
+ if (segno != curseg->segno) {
+ curseg->next_segno = segno;
+ change_curseg(sbi, type, true);
+ }
+ curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) &
+ (sbi->blocks_per_seg - 1);
+ __add_sum_entry(sbi, type, sum, curseg->next_blkoff);
+
+ /* change the current log to the next block addr in advance */
+ if (next_segno != segno) {
+ curseg->next_segno = next_segno;
+ change_curseg(sbi, type, true);
+ }
+ curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) &
+ (sbi->blocks_per_seg - 1);
+
+ /* rewrite node page */
+ set_page_writeback(page);
+ submit_write_page(sbi, page, new_blkaddr, NODE);
+ f2fs_submit_bio(sbi, NODE, true);
+ refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
+
+ locate_dirty_segment(sbi, old_cursegno);
+ locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
+
+ mutex_unlock(&sit_i->sentry_lock);
+ mutex_unlock(&curseg->curseg_mutex);
+}
+
+static int read_compacted_summaries(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct curseg_info *seg_i;
+ unsigned char *kaddr;
+ struct page *page;
+ block_t start;
+ int i, j, offset;
+
+ start = start_sum_block(sbi);
+
+ page = get_meta_page(sbi, start++);
+ kaddr = (unsigned char *)page_address(page);
+
+ /* Step 1: restore nat cache */
+ seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
+ memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE);
+
+ /* Step 2: restore sit cache */
+ seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
+ memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE,
+ SUM_JOURNAL_SIZE);
+ offset = 2 * SUM_JOURNAL_SIZE;
+
+ /* Step 3: restore summary entries */
+ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
+ unsigned short blk_off;
+ unsigned int segno;
+
+ seg_i = CURSEG_I(sbi, i);
+ segno = le32_to_cpu(ckpt->cur_data_segno[i]);
+ blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
+ seg_i->next_segno = segno;
+ reset_curseg(sbi, i, 0);
+ seg_i->alloc_type = ckpt->alloc_type[i];
+ seg_i->next_blkoff = blk_off;
+
+ if (seg_i->alloc_type == SSR)
+ blk_off = sbi->blocks_per_seg;
+
+ for (j = 0; j < blk_off; j++) {
+ struct f2fs_summary *s;
+ s = (struct f2fs_summary *)(kaddr + offset);
+ seg_i->sum_blk->entries[j] = *s;
+ offset += SUMMARY_SIZE;
+ if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
+ SUM_FOOTER_SIZE)
+ continue;
+
+ f2fs_put_page(page, 1);
+ page = NULL;
+
+ page = get_meta_page(sbi, start++);
+ kaddr = (unsigned char *)page_address(page);
+ offset = 0;
+ }
+ }
+ f2fs_put_page(page, 1);
+ return 0;
+}
+
+static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct f2fs_summary_block *sum;
+ struct curseg_info *curseg;
+ struct page *new;
+ unsigned short blk_off;
+ unsigned int segno = 0;
+ block_t blk_addr = 0;
+
+ /* get segment number and block addr */
+ if (IS_DATASEG(type)) {
+ segno = le32_to_cpu(ckpt->cur_data_segno[type]);
+ blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
+ CURSEG_HOT_DATA]);
+ if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))
+ blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
+ else
+ blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
+ } else {
+ segno = le32_to_cpu(ckpt->cur_node_segno[type -
+ CURSEG_HOT_NODE]);
+ blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
+ CURSEG_HOT_NODE]);
+ if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))
+ blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
+ type - CURSEG_HOT_NODE);
+ else
+ blk_addr = GET_SUM_BLOCK(sbi, segno);
+ }
+
+ new = get_meta_page(sbi, blk_addr);
+ sum = (struct f2fs_summary_block *)page_address(new);
+
+ if (IS_NODESEG(type)) {
+ if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) {
+ struct f2fs_summary *ns = &sum->entries[0];
+ int i;
+ for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
+ ns->version = 0;
+ ns->ofs_in_node = 0;
+ }
+ } else {
+ if (restore_node_summary(sbi, segno, sum)) {
+ f2fs_put_page(new, 1);
+ return -EINVAL;
+ }
+ }
+ }
+
+ /* set uncompleted segment to curseg */
+ curseg = CURSEG_I(sbi, type);
+ mutex_lock(&curseg->curseg_mutex);
+ memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE);
+ curseg->next_segno = segno;
+ reset_curseg(sbi, type, 0);
+ curseg->alloc_type = ckpt->alloc_type[type];
+ curseg->next_blkoff = blk_off;
+ mutex_unlock(&curseg->curseg_mutex);
+ f2fs_put_page(new, 1);
+ return 0;
+}
+
+static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
+{
+ int type = CURSEG_HOT_DATA;
+
+ if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) {
+ /* restore for compacted data summary */
+ if (read_compacted_summaries(sbi))
+ return -EINVAL;
+ type = CURSEG_HOT_NODE;
+ }
+
+ for (; type <= CURSEG_COLD_NODE; type++)
+ if (read_normal_summaries(sbi, type))
+ return -EINVAL;
+ return 0;
+}
+
+static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
+{
+ struct page *page;
+ unsigned char *kaddr;
+ struct f2fs_summary *summary;
+ struct curseg_info *seg_i;
+ int written_size = 0;
+ int i, j;
+
+ page = grab_meta_page(sbi, blkaddr++);
+ kaddr = (unsigned char *)page_address(page);
+
+ /* Step 1: write nat cache */
+ seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
+ memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE);
+ written_size += SUM_JOURNAL_SIZE;
+
+ /* Step 2: write sit cache */
+ seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
+ memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits,
+ SUM_JOURNAL_SIZE);
+ written_size += SUM_JOURNAL_SIZE;
+
+ set_page_dirty(page);
+
+ /* Step 3: write summary entries */
+ for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
+ unsigned short blkoff;
+ seg_i = CURSEG_I(sbi, i);
+ if (sbi->ckpt->alloc_type[i] == SSR)
+ blkoff = sbi->blocks_per_seg;
+ else
+ blkoff = curseg_blkoff(sbi, i);
+
+ for (j = 0; j < blkoff; j++) {
+ if (!page) {
+ page = grab_meta_page(sbi, blkaddr++);
+ kaddr = (unsigned char *)page_address(page);
+ written_size = 0;
+ }
+ summary = (struct f2fs_summary *)(kaddr + written_size);
+ *summary = seg_i->sum_blk->entries[j];
+ written_size += SUMMARY_SIZE;
+ set_page_dirty(page);
+
+ if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE -
+ SUM_FOOTER_SIZE)
+ continue;
+
+ f2fs_put_page(page, 1);
+ page = NULL;
+ }
+ }
+ if (page)
+ f2fs_put_page(page, 1);
+}
+
+static void write_normal_summaries(struct f2fs_sb_info *sbi,
+ block_t blkaddr, int type)
+{
+ int i, end;
+ if (IS_DATASEG(type))
+ end = type + NR_CURSEG_DATA_TYPE;
+ else
+ end = type + NR_CURSEG_NODE_TYPE;
+
+ for (i = type; i < end; i++) {
+ struct curseg_info *sum = CURSEG_I(sbi, i);
+ mutex_lock(&sum->curseg_mutex);
+ write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type));
+ mutex_unlock(&sum->curseg_mutex);
+ }
+}
+
+void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
+{
+ if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG))
+ write_compacted_summaries(sbi, start_blk);
+ else
+ write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
+}
+
+void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
+{
+ if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG))
+ write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
+ return;
+}
+
+int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type,
+ unsigned int val, int alloc)
+{
+ int i;
+
+ if (type == NAT_JOURNAL) {
+ for (i = 0; i < nats_in_cursum(sum); i++) {
+ if (le32_to_cpu(nid_in_journal(sum, i)) == val)
+ return i;
+ }
+ if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES)
+ return update_nats_in_cursum(sum, 1);
+ } else if (type == SIT_JOURNAL) {
+ for (i = 0; i < sits_in_cursum(sum); i++)
+ if (le32_to_cpu(segno_in_journal(sum, i)) == val)
+ return i;
+ if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES)
+ return update_sits_in_cursum(sum, 1);
+ }
+ return -1;
+}
+
+static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno);
+ block_t blk_addr = sit_i->sit_base_addr + offset;
+
+ check_seg_range(sbi, segno);
+
+ /* calculate sit block address */
+ if (f2fs_test_bit(offset, sit_i->sit_bitmap))
+ blk_addr += sit_i->sit_blocks;
+
+ return get_meta_page(sbi, blk_addr);
+}
+
+static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
+ unsigned int start)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct page *src_page, *dst_page;
+ pgoff_t src_off, dst_off;
+ void *src_addr, *dst_addr;
+
+ src_off = current_sit_addr(sbi, start);
+ dst_off = next_sit_addr(sbi, src_off);
+
+ /* get current sit block page without lock */
+ src_page = get_meta_page(sbi, src_off);
+ dst_page = grab_meta_page(sbi, dst_off);
+ BUG_ON(PageDirty(src_page));
+
+ src_addr = page_address(src_page);
+ dst_addr = page_address(dst_page);
+ memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE);
+
+ set_page_dirty(dst_page);
+ f2fs_put_page(src_page, 1);
+
+ set_to_next_sit(sit_i, start);
+
+ return dst_page;
+}
+
+static bool flush_sits_in_journal(struct f2fs_sb_info *sbi)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ int i;
+
+ /*
+ * If the journal area in the current summary is full of sit entries,
+ * all the sit entries will be flushed. Otherwise the sit entries
+ * are not able to replace with newly hot sit entries.
+ */
+ if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) {
+ for (i = sits_in_cursum(sum) - 1; i >= 0; i--) {
+ unsigned int segno;
+ segno = le32_to_cpu(segno_in_journal(sum, i));
+ __mark_sit_entry_dirty(sbi, segno);
+ }
+ update_sits_in_cursum(sum, -sits_in_cursum(sum));
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * CP calls this function, which flushes SIT entries including sit_journal,
+ * and moves prefree segs to free segs.
+ */
+void flush_sit_entries(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ unsigned long nsegs = TOTAL_SEGS(sbi);
+ struct page *page = NULL;
+ struct f2fs_sit_block *raw_sit = NULL;
+ unsigned int start = 0, end = 0;
+ unsigned int segno = -1;
+ bool flushed;
+
+ mutex_lock(&curseg->curseg_mutex);
+ mutex_lock(&sit_i->sentry_lock);
+
+ /*
+ * "flushed" indicates whether sit entries in journal are flushed
+ * to the SIT area or not.
+ */
+ flushed = flush_sits_in_journal(sbi);
+
+ while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) {
+ struct seg_entry *se = get_seg_entry(sbi, segno);
+ int sit_offset, offset;
+
+ sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
+
+ if (flushed)
+ goto to_sit_page;
+
+ offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1);
+ if (offset >= 0) {
+ segno_in_journal(sum, offset) = cpu_to_le32(segno);
+ seg_info_to_raw_sit(se, &sit_in_journal(sum, offset));
+ goto flush_done;
+ }
+to_sit_page:
+ if (!page || (start > segno) || (segno > end)) {
+ if (page) {
+ f2fs_put_page(page, 1);
+ page = NULL;
+ }
+
+ start = START_SEGNO(sit_i, segno);
+ end = start + SIT_ENTRY_PER_BLOCK - 1;
+
+ /* read sit block that will be updated */
+ page = get_next_sit_page(sbi, start);
+ raw_sit = page_address(page);
+ }
+
+ /* udpate entry in SIT block */
+ seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]);
+flush_done:
+ __clear_bit(segno, bitmap);
+ sit_i->dirty_sentries--;
+ }
+ mutex_unlock(&sit_i->sentry_lock);
+ mutex_unlock(&curseg->curseg_mutex);
+
+ /* writeout last modified SIT block */
+ f2fs_put_page(page, 1);
+
+ set_prefree_as_free_segments(sbi);
+}
+
+static int build_sit_info(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct sit_info *sit_i;
+ unsigned int sit_segs, start;
+ char *src_bitmap, *dst_bitmap;
+ unsigned int bitmap_size;
+
+ /* allocate memory for SIT information */
+ sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL);
+ if (!sit_i)
+ return -ENOMEM;
+
+ SM_I(sbi)->sit_info = sit_i;
+
+ sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry));
+ if (!sit_i->sentries)
+ return -ENOMEM;
+
+ bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
+ sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!sit_i->dirty_sentries_bitmap)
+ return -ENOMEM;
+
+ for (start = 0; start < TOTAL_SEGS(sbi); start++) {
+ sit_i->sentries[start].cur_valid_map
+ = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
+ sit_i->sentries[start].ckpt_valid_map
+ = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
+ if (!sit_i->sentries[start].cur_valid_map
+ || !sit_i->sentries[start].ckpt_valid_map)
+ return -ENOMEM;
+ }
+
+ if (sbi->segs_per_sec > 1) {
+ sit_i->sec_entries = vzalloc(sbi->total_sections *
+ sizeof(struct sec_entry));
+ if (!sit_i->sec_entries)
+ return -ENOMEM;
+ }
+
+ /* get information related with SIT */
+ sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
+
+ /* setup SIT bitmap from ckeckpoint pack */
+ bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
+ src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
+
+ dst_bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!dst_bitmap)
+ return -ENOMEM;
+ memcpy(dst_bitmap, src_bitmap, bitmap_size);
+
+ /* init SIT information */
+ sit_i->s_ops = &default_salloc_ops;
+
+ sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
+ sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg;
+ sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count);
+ sit_i->sit_bitmap = dst_bitmap;
+ sit_i->bitmap_size = bitmap_size;
+ sit_i->dirty_sentries = 0;
+ sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
+ sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
+ sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec;
+ mutex_init(&sit_i->sentry_lock);
+ return 0;
+}
+
+static int build_free_segmap(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_sm_info *sm_info = SM_I(sbi);
+ struct free_segmap_info *free_i;
+ unsigned int bitmap_size, sec_bitmap_size;
+
+ /* allocate memory for free segmap information */
+ free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL);
+ if (!free_i)
+ return -ENOMEM;
+
+ SM_I(sbi)->free_info = free_i;
+
+ bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
+ free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL);
+ if (!free_i->free_segmap)
+ return -ENOMEM;
+
+ sec_bitmap_size = f2fs_bitmap_size(sbi->total_sections);
+ free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL);
+ if (!free_i->free_secmap)
+ return -ENOMEM;
+
+ /* set all segments as dirty temporarily */
+ memset(free_i->free_segmap, 0xff, bitmap_size);
+ memset(free_i->free_secmap, 0xff, sec_bitmap_size);
+
+ /* init free segmap information */
+ free_i->start_segno =
+ (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr);
+ free_i->free_segments = 0;
+ free_i->free_sections = 0;
+ rwlock_init(&free_i->segmap_lock);
+ return 0;
+}
+
+static int build_curseg(struct f2fs_sb_info *sbi)
+{
+ struct curseg_info *array;
+ int i;
+
+ array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL);
+ if (!array)
+ return -ENOMEM;
+
+ SM_I(sbi)->curseg_array = array;
+
+ for (i = 0; i < NR_CURSEG_TYPE; i++) {
+ mutex_init(&array[i].curseg_mutex);
+ array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
+ if (!array[i].sum_blk)
+ return -ENOMEM;
+ array[i].segno = NULL_SEGNO;
+ array[i].next_blkoff = 0;
+ }
+ return restore_curseg_summaries(sbi);
+}
+
+static void build_sit_entries(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
+ struct f2fs_summary_block *sum = curseg->sum_blk;
+ unsigned int start;
+
+ for (start = 0; start < TOTAL_SEGS(sbi); start++) {
+ struct seg_entry *se = &sit_i->sentries[start];
+ struct f2fs_sit_block *sit_blk;
+ struct f2fs_sit_entry sit;
+ struct page *page;
+ int i;
+
+ mutex_lock(&curseg->curseg_mutex);
+ for (i = 0; i < sits_in_cursum(sum); i++) {
+ if (le32_to_cpu(segno_in_journal(sum, i)) == start) {
+ sit = sit_in_journal(sum, i);
+ mutex_unlock(&curseg->curseg_mutex);
+ goto got_it;
+ }
+ }
+ mutex_unlock(&curseg->curseg_mutex);
+ page = get_current_sit_page(sbi, start);
+ sit_blk = (struct f2fs_sit_block *)page_address(page);
+ sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
+ f2fs_put_page(page, 1);
+got_it:
+ check_block_count(sbi, start, &sit);
+ seg_info_from_raw_sit(se, &sit);
+ if (sbi->segs_per_sec > 1) {
+ struct sec_entry *e = get_sec_entry(sbi, start);
+ e->valid_blocks += se->valid_blocks;
+ }
+ }
+}
+
+static void init_free_segmap(struct f2fs_sb_info *sbi)
+{
+ unsigned int start;
+ int type;
+
+ for (start = 0; start < TOTAL_SEGS(sbi); start++) {
+ struct seg_entry *sentry = get_seg_entry(sbi, start);
+ if (!sentry->valid_blocks)
+ __set_free(sbi, start);
+ }
+
+ /* set use the current segments */
+ for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
+ struct curseg_info *curseg_t = CURSEG_I(sbi, type);
+ __set_test_and_inuse(sbi, curseg_t->segno);
+ }
+}
+
+static void init_dirty_segmap(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int segno = 0, offset = 0;
+ unsigned short valid_blocks;
+
+ while (segno < TOTAL_SEGS(sbi)) {
+ /* find dirty segment based on free segmap */
+ segno = find_next_inuse(free_i, TOTAL_SEGS(sbi), offset);
+ if (segno >= TOTAL_SEGS(sbi))
+ break;
+ offset = segno + 1;
+ valid_blocks = get_valid_blocks(sbi, segno, 0);
+ if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks)
+ continue;
+ mutex_lock(&dirty_i->seglist_lock);
+ __locate_dirty_segment(sbi, segno, DIRTY);
+ mutex_unlock(&dirty_i->seglist_lock);
+ }
+}
+
+static int init_victim_segmap(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
+
+ dirty_i->victim_segmap[FG_GC] = kzalloc(bitmap_size, GFP_KERNEL);
+ dirty_i->victim_segmap[BG_GC] = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!dirty_i->victim_segmap[FG_GC] || !dirty_i->victim_segmap[BG_GC])
+ return -ENOMEM;
+ return 0;
+}
+
+static int build_dirty_segmap(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i;
+ unsigned int bitmap_size, i;
+
+ /* allocate memory for dirty segments list information */
+ dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL);
+ if (!dirty_i)
+ return -ENOMEM;
+
+ SM_I(sbi)->dirty_info = dirty_i;
+ mutex_init(&dirty_i->seglist_lock);
+
+ bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
+
+ for (i = 0; i < NR_DIRTY_TYPE; i++) {
+ dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL);
+ if (!dirty_i->dirty_segmap[i])
+ return -ENOMEM;
+ }
+
+ init_dirty_segmap(sbi);
+ return init_victim_segmap(sbi);
+}
+
+/*
+ * Update min, max modified time for cost-benefit GC algorithm
+ */
+static void init_min_max_mtime(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int segno;
+
+ mutex_lock(&sit_i->sentry_lock);
+
+ sit_i->min_mtime = LLONG_MAX;
+
+ for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) {
+ unsigned int i;
+ unsigned long long mtime = 0;
+
+ for (i = 0; i < sbi->segs_per_sec; i++)
+ mtime += get_seg_entry(sbi, segno + i)->mtime;
+
+ mtime = div_u64(mtime, sbi->segs_per_sec);
+
+ if (sit_i->min_mtime > mtime)
+ sit_i->min_mtime = mtime;
+ }
+ sit_i->max_mtime = get_mtime(sbi);
+ mutex_unlock(&sit_i->sentry_lock);
+}
+
+int build_segment_manager(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct f2fs_sm_info *sm_info;
+ int err;
+
+ sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL);
+ if (!sm_info)
+ return -ENOMEM;
+
+ /* init sm info */
+ sbi->sm_info = sm_info;
+ INIT_LIST_HEAD(&sm_info->wblist_head);
+ spin_lock_init(&sm_info->wblist_lock);
+ sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
+ sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
+ sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
+ sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
+ sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
+ sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
+ sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
+
+ err = build_sit_info(sbi);
+ if (err)
+ return err;
+ err = build_free_segmap(sbi);
+ if (err)
+ return err;
+ err = build_curseg(sbi);
+ if (err)
+ return err;
+
+ /* reinit free segmap based on SIT */
+ build_sit_entries(sbi);
+
+ init_free_segmap(sbi);
+ err = build_dirty_segmap(sbi);
+ if (err)
+ return err;
+
+ init_min_max_mtime(sbi);
+ return 0;
+}
+
+static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
+ enum dirty_type dirty_type)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+
+ mutex_lock(&dirty_i->seglist_lock);
+ kfree(dirty_i->dirty_segmap[dirty_type]);
+ dirty_i->nr_dirty[dirty_type] = 0;
+ mutex_unlock(&dirty_i->seglist_lock);
+}
+
+void reset_victim_segmap(struct f2fs_sb_info *sbi)
+{
+ unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi));
+ memset(DIRTY_I(sbi)->victim_segmap[FG_GC], 0, bitmap_size);
+}
+
+static void destroy_victim_segmap(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+
+ kfree(dirty_i->victim_segmap[FG_GC]);
+ kfree(dirty_i->victim_segmap[BG_GC]);
+}
+
+static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ int i;
+
+ if (!dirty_i)
+ return;
+
+ /* discard pre-free/dirty segments list */
+ for (i = 0; i < NR_DIRTY_TYPE; i++)
+ discard_dirty_segmap(sbi, i);
+
+ destroy_victim_segmap(sbi);
+ SM_I(sbi)->dirty_info = NULL;
+ kfree(dirty_i);
+}
+
+static void destroy_curseg(struct f2fs_sb_info *sbi)
+{
+ struct curseg_info *array = SM_I(sbi)->curseg_array;
+ int i;
+
+ if (!array)
+ return;
+ SM_I(sbi)->curseg_array = NULL;
+ for (i = 0; i < NR_CURSEG_TYPE; i++)
+ kfree(array[i].sum_blk);
+ kfree(array);
+}
+
+static void destroy_free_segmap(struct f2fs_sb_info *sbi)
+{
+ struct free_segmap_info *free_i = SM_I(sbi)->free_info;
+ if (!free_i)
+ return;
+ SM_I(sbi)->free_info = NULL;
+ kfree(free_i->free_segmap);
+ kfree(free_i->free_secmap);
+ kfree(free_i);
+}
+
+static void destroy_sit_info(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int start;
+
+ if (!sit_i)
+ return;
+
+ if (sit_i->sentries) {
+ for (start = 0; start < TOTAL_SEGS(sbi); start++) {
+ kfree(sit_i->sentries[start].cur_valid_map);
+ kfree(sit_i->sentries[start].ckpt_valid_map);
+ }
+ }
+ vfree(sit_i->sentries);
+ vfree(sit_i->sec_entries);
+ kfree(sit_i->dirty_sentries_bitmap);
+
+ SM_I(sbi)->sit_info = NULL;
+ kfree(sit_i->sit_bitmap);
+ kfree(sit_i);
+}
+
+void destroy_segment_manager(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_sm_info *sm_info = SM_I(sbi);
+ destroy_dirty_segmap(sbi);
+ destroy_curseg(sbi);
+ destroy_free_segmap(sbi);
+ destroy_sit_info(sbi);
+ sbi->sm_info = NULL;
+ kfree(sm_info);
+}
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
new file mode 100644
index 000000000000..66a288a52fd3
--- /dev/null
+++ b/fs/f2fs/segment.h
@@ -0,0 +1,631 @@
+/*
+ * fs/f2fs/segment.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/* constant macro */
+#define NULL_SEGNO ((unsigned int)(~0))
+
+/* V: Logical segment # in volume, R: Relative segment # in main area */
+#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno)
+#define GET_R2L_SEGNO(free_i, segno) (segno + free_i->start_segno)
+
+#define IS_DATASEG(t) \
+ ((t == CURSEG_HOT_DATA) || (t == CURSEG_COLD_DATA) || \
+ (t == CURSEG_WARM_DATA))
+
+#define IS_NODESEG(t) \
+ ((t == CURSEG_HOT_NODE) || (t == CURSEG_COLD_NODE) || \
+ (t == CURSEG_WARM_NODE))
+
+#define IS_CURSEG(sbi, segno) \
+ ((segno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \
+ (segno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno))
+
+#define IS_CURSEC(sbi, secno) \
+ ((secno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \
+ sbi->segs_per_sec) || \
+ (secno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \
+ sbi->segs_per_sec)) \
+
+#define START_BLOCK(sbi, segno) \
+ (SM_I(sbi)->seg0_blkaddr + \
+ (GET_R2L_SEGNO(FREE_I(sbi), segno) << sbi->log_blocks_per_seg))
+#define NEXT_FREE_BLKADDR(sbi, curseg) \
+ (START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff)
+
+#define MAIN_BASE_BLOCK(sbi) (SM_I(sbi)->main_blkaddr)
+
+#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) \
+ ((blk_addr) - SM_I(sbi)->seg0_blkaddr)
+#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \
+ (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg)
+#define GET_SEGNO(sbi, blk_addr) \
+ (((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ? \
+ NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \
+ GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
+#define GET_SECNO(sbi, segno) \
+ ((segno) / sbi->segs_per_sec)
+#define GET_ZONENO_FROM_SEGNO(sbi, segno) \
+ ((segno / sbi->segs_per_sec) / sbi->secs_per_zone)
+
+#define GET_SUM_BLOCK(sbi, segno) \
+ ((sbi->sm_info->ssa_blkaddr) + segno)
+
+#define GET_SUM_TYPE(footer) ((footer)->entry_type)
+#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type)
+
+#define SIT_ENTRY_OFFSET(sit_i, segno) \
+ (segno % sit_i->sents_per_block)
+#define SIT_BLOCK_OFFSET(sit_i, segno) \
+ (segno / SIT_ENTRY_PER_BLOCK)
+#define START_SEGNO(sit_i, segno) \
+ (SIT_BLOCK_OFFSET(sit_i, segno) * SIT_ENTRY_PER_BLOCK)
+#define f2fs_bitmap_size(nr) \
+ (BITS_TO_LONGS(nr) * sizeof(unsigned long))
+#define TOTAL_SEGS(sbi) (SM_I(sbi)->main_segments)
+
+#define SECTOR_FROM_BLOCK(sbi, blk_addr) \
+ (blk_addr << ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE))
+
+/* during checkpoint, bio_private is used to synchronize the last bio */
+struct bio_private {
+ struct f2fs_sb_info *sbi;
+ bool is_sync;
+ void *wait;
+};
+
+/*
+ * indicate a block allocation direction: RIGHT and LEFT.
+ * RIGHT means allocating new sections towards the end of volume.
+ * LEFT means the opposite direction.
+ */
+enum {
+ ALLOC_RIGHT = 0,
+ ALLOC_LEFT
+};
+
+/*
+ * In the victim_sel_policy->alloc_mode, there are two block allocation modes.
+ * LFS writes data sequentially with cleaning operations.
+ * SSR (Slack Space Recycle) reuses obsolete space without cleaning operations.
+ */
+enum {
+ LFS = 0,
+ SSR
+};
+
+/*
+ * In the victim_sel_policy->gc_mode, there are two gc, aka cleaning, modes.
+ * GC_CB is based on cost-benefit algorithm.
+ * GC_GREEDY is based on greedy algorithm.
+ */
+enum {
+ GC_CB = 0,
+ GC_GREEDY
+};
+
+/*
+ * BG_GC means the background cleaning job.
+ * FG_GC means the on-demand cleaning job.
+ */
+enum {
+ BG_GC = 0,
+ FG_GC
+};
+
+/* for a function parameter to select a victim segment */
+struct victim_sel_policy {
+ int alloc_mode; /* LFS or SSR */
+ int gc_mode; /* GC_CB or GC_GREEDY */
+ unsigned long *dirty_segmap; /* dirty segment bitmap */
+ unsigned int offset; /* last scanned bitmap offset */
+ unsigned int ofs_unit; /* bitmap search unit */
+ unsigned int min_cost; /* minimum cost */
+ unsigned int min_segno; /* segment # having min. cost */
+};
+
+struct seg_entry {
+ unsigned short valid_blocks; /* # of valid blocks */
+ unsigned char *cur_valid_map; /* validity bitmap of blocks */
+ /*
+ * # of valid blocks and the validity bitmap stored in the the last
+ * checkpoint pack. This information is used by the SSR mode.
+ */
+ unsigned short ckpt_valid_blocks;
+ unsigned char *ckpt_valid_map;
+ unsigned char type; /* segment type like CURSEG_XXX_TYPE */
+ unsigned long long mtime; /* modification time of the segment */
+};
+
+struct sec_entry {
+ unsigned int valid_blocks; /* # of valid blocks in a section */
+};
+
+struct segment_allocation {
+ void (*allocate_segment)(struct f2fs_sb_info *, int, bool);
+};
+
+struct sit_info {
+ const struct segment_allocation *s_ops;
+
+ block_t sit_base_addr; /* start block address of SIT area */
+ block_t sit_blocks; /* # of blocks used by SIT area */
+ block_t written_valid_blocks; /* # of valid blocks in main area */
+ char *sit_bitmap; /* SIT bitmap pointer */
+ unsigned int bitmap_size; /* SIT bitmap size */
+
+ unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */
+ unsigned int dirty_sentries; /* # of dirty sentries */
+ unsigned int sents_per_block; /* # of SIT entries per block */
+ struct mutex sentry_lock; /* to protect SIT cache */
+ struct seg_entry *sentries; /* SIT segment-level cache */
+ struct sec_entry *sec_entries; /* SIT section-level cache */
+
+ /* for cost-benefit algorithm in cleaning procedure */
+ unsigned long long elapsed_time; /* elapsed time after mount */
+ unsigned long long mounted_time; /* mount time */
+ unsigned long long min_mtime; /* min. modification time */
+ unsigned long long max_mtime; /* max. modification time */
+};
+
+struct free_segmap_info {
+ unsigned int start_segno; /* start segment number logically */
+ unsigned int free_segments; /* # of free segments */
+ unsigned int free_sections; /* # of free sections */
+ rwlock_t segmap_lock; /* free segmap lock */
+ unsigned long *free_segmap; /* free segment bitmap */
+ unsigned long *free_secmap; /* free section bitmap */
+};
+
+/* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */
+enum dirty_type {
+ DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */
+ DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */
+ DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */
+ DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */
+ DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */
+ DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */
+ DIRTY, /* to count # of dirty segments */
+ PRE, /* to count # of entirely obsolete segments */
+ NR_DIRTY_TYPE
+};
+
+struct dirty_seglist_info {
+ const struct victim_selection *v_ops; /* victim selction operation */
+ unsigned long *dirty_segmap[NR_DIRTY_TYPE];
+ struct mutex seglist_lock; /* lock for segment bitmaps */
+ int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */
+ unsigned long *victim_segmap[2]; /* BG_GC, FG_GC */
+};
+
+/* victim selection function for cleaning and SSR */
+struct victim_selection {
+ int (*get_victim)(struct f2fs_sb_info *, unsigned int *,
+ int, int, char);
+};
+
+/* for active log information */
+struct curseg_info {
+ struct mutex curseg_mutex; /* lock for consistency */
+ struct f2fs_summary_block *sum_blk; /* cached summary block */
+ unsigned char alloc_type; /* current allocation type */
+ unsigned int segno; /* current segment number */
+ unsigned short next_blkoff; /* next block offset to write */
+ unsigned int zone; /* current zone number */
+ unsigned int next_segno; /* preallocated segment */
+};
+
+/*
+ * inline functions
+ */
+static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type)
+{
+ return (struct curseg_info *)(SM_I(sbi)->curseg_array + type);
+}
+
+static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ return &sit_i->sentries[segno];
+}
+
+static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ return &sit_i->sec_entries[GET_SECNO(sbi, segno)];
+}
+
+static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi,
+ unsigned int segno, int section)
+{
+ /*
+ * In order to get # of valid blocks in a section instantly from many
+ * segments, f2fs manages two counting structures separately.
+ */
+ if (section > 1)
+ return get_sec_entry(sbi, segno)->valid_blocks;
+ else
+ return get_seg_entry(sbi, segno)->valid_blocks;
+}
+
+static inline void seg_info_from_raw_sit(struct seg_entry *se,
+ struct f2fs_sit_entry *rs)
+{
+ se->valid_blocks = GET_SIT_VBLOCKS(rs);
+ se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs);
+ memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+ memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+ se->type = GET_SIT_TYPE(rs);
+ se->mtime = le64_to_cpu(rs->mtime);
+}
+
+static inline void seg_info_to_raw_sit(struct seg_entry *se,
+ struct f2fs_sit_entry *rs)
+{
+ unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) |
+ se->valid_blocks;
+ rs->vblocks = cpu_to_le16(raw_vblocks);
+ memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
+ memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
+ se->ckpt_valid_blocks = se->valid_blocks;
+ rs->mtime = cpu_to_le64(se->mtime);
+}
+
+static inline unsigned int find_next_inuse(struct free_segmap_info *free_i,
+ unsigned int max, unsigned int segno)
+{
+ unsigned int ret;
+ read_lock(&free_i->segmap_lock);
+ ret = find_next_bit(free_i->free_segmap, max, segno);
+ read_unlock(&free_i->segmap_lock);
+ return ret;
+}
+
+static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ unsigned int start_segno = secno * sbi->segs_per_sec;
+ unsigned int next;
+
+ write_lock(&free_i->segmap_lock);
+ clear_bit(segno, free_i->free_segmap);
+ free_i->free_segments++;
+
+ next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi), start_segno);
+ if (next >= start_segno + sbi->segs_per_sec) {
+ clear_bit(secno, free_i->free_secmap);
+ free_i->free_sections++;
+ }
+ write_unlock(&free_i->segmap_lock);
+}
+
+static inline void __set_inuse(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ set_bit(segno, free_i->free_segmap);
+ free_i->free_segments--;
+ if (!test_and_set_bit(secno, free_i->free_secmap))
+ free_i->free_sections--;
+}
+
+static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ unsigned int start_segno = secno * sbi->segs_per_sec;
+ unsigned int next;
+
+ write_lock(&free_i->segmap_lock);
+ if (test_and_clear_bit(segno, free_i->free_segmap)) {
+ free_i->free_segments++;
+
+ next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi),
+ start_segno);
+ if (next >= start_segno + sbi->segs_per_sec) {
+ if (test_and_clear_bit(secno, free_i->free_secmap))
+ free_i->free_sections++;
+ }
+ }
+ write_unlock(&free_i->segmap_lock);
+}
+
+static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi,
+ unsigned int segno)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int secno = segno / sbi->segs_per_sec;
+ write_lock(&free_i->segmap_lock);
+ if (!test_and_set_bit(segno, free_i->free_segmap)) {
+ free_i->free_segments--;
+ if (!test_and_set_bit(secno, free_i->free_secmap))
+ free_i->free_sections--;
+ }
+ write_unlock(&free_i->segmap_lock);
+}
+
+static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
+ void *dst_addr)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size);
+}
+
+static inline block_t written_block_count(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ block_t vblocks;
+
+ mutex_lock(&sit_i->sentry_lock);
+ vblocks = sit_i->written_valid_blocks;
+ mutex_unlock(&sit_i->sentry_lock);
+
+ return vblocks;
+}
+
+static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int free_segs;
+
+ read_lock(&free_i->segmap_lock);
+ free_segs = free_i->free_segments;
+ read_unlock(&free_i->segmap_lock);
+
+ return free_segs;
+}
+
+static inline int reserved_segments(struct f2fs_sb_info *sbi)
+{
+ return SM_I(sbi)->reserved_segments;
+}
+
+static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
+{
+ struct free_segmap_info *free_i = FREE_I(sbi);
+ unsigned int free_secs;
+
+ read_lock(&free_i->segmap_lock);
+ free_secs = free_i->free_sections;
+ read_unlock(&free_i->segmap_lock);
+
+ return free_secs;
+}
+
+static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
+{
+ return DIRTY_I(sbi)->nr_dirty[PRE];
+}
+
+static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi)
+{
+ return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] +
+ DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE];
+}
+
+static inline int overprovision_segments(struct f2fs_sb_info *sbi)
+{
+ return SM_I(sbi)->ovp_segments;
+}
+
+static inline int overprovision_sections(struct f2fs_sb_info *sbi)
+{
+ return ((unsigned int) overprovision_segments(sbi)) / sbi->segs_per_sec;
+}
+
+static inline int reserved_sections(struct f2fs_sb_info *sbi)
+{
+ return ((unsigned int) reserved_segments(sbi)) / sbi->segs_per_sec;
+}
+
+static inline bool need_SSR(struct f2fs_sb_info *sbi)
+{
+ return (free_sections(sbi) < overprovision_sections(sbi));
+}
+
+static inline int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return DIRTY_I(sbi)->v_ops->get_victim(sbi,
+ &(curseg)->next_segno, BG_GC, type, SSR);
+}
+
+static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi)
+{
+ unsigned int pages_per_sec = (1 << sbi->log_blocks_per_seg) *
+ sbi->segs_per_sec;
+ int node_secs = ((get_pages(sbi, F2FS_DIRTY_NODES) + pages_per_sec - 1)
+ >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
+ int dent_secs = ((get_pages(sbi, F2FS_DIRTY_DENTS) + pages_per_sec - 1)
+ >> sbi->log_blocks_per_seg) / sbi->segs_per_sec;
+
+ if (sbi->por_doing)
+ return false;
+
+ if (free_sections(sbi) <= (node_secs + 2 * dent_secs +
+ reserved_sections(sbi)))
+ return true;
+ return false;
+}
+
+static inline int utilization(struct f2fs_sb_info *sbi)
+{
+ return (long int)valid_user_blocks(sbi) * 100 /
+ (long int)sbi->user_block_count;
+}
+
+/*
+ * Sometimes f2fs may be better to drop out-of-place update policy.
+ * So, if fs utilization is over MIN_IPU_UTIL, then f2fs tries to write
+ * data in the original place likewise other traditional file systems.
+ * But, currently set 100 in percentage, which means it is disabled.
+ * See below need_inplace_update().
+ */
+#define MIN_IPU_UTIL 100
+static inline bool need_inplace_update(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ if (S_ISDIR(inode->i_mode))
+ return false;
+ if (need_SSR(sbi) && utilization(sbi) > MIN_IPU_UTIL)
+ return true;
+ return false;
+}
+
+static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi,
+ int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return curseg->segno;
+}
+
+static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi,
+ int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return curseg->alloc_type;
+}
+
+static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ return curseg->next_blkoff;
+}
+
+static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ unsigned int end_segno = SM_I(sbi)->segment_count - 1;
+ BUG_ON(segno > end_segno);
+}
+
+/*
+ * This function is used for only debugging.
+ * NOTE: In future, we have to remove this function.
+ */
+static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
+{
+ struct f2fs_sm_info *sm_info = SM_I(sbi);
+ block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg;
+ block_t start_addr = sm_info->seg0_blkaddr;
+ block_t end_addr = start_addr + total_blks - 1;
+ BUG_ON(blk_addr < start_addr);
+ BUG_ON(blk_addr > end_addr);
+}
+
+/*
+ * Summary block is always treated as invalid block
+ */
+static inline void check_block_count(struct f2fs_sb_info *sbi,
+ int segno, struct f2fs_sit_entry *raw_sit)
+{
+ struct f2fs_sm_info *sm_info = SM_I(sbi);
+ unsigned int end_segno = sm_info->segment_count - 1;
+ int valid_blocks = 0;
+ int i;
+
+ /* check segment usage */
+ BUG_ON(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg);
+
+ /* check boundary of a given segment number */
+ BUG_ON(segno > end_segno);
+
+ /* check bitmap with valid block count */
+ for (i = 0; i < sbi->blocks_per_seg; i++)
+ if (f2fs_test_bit(i, raw_sit->valid_map))
+ valid_blocks++;
+ BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks);
+}
+
+static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi,
+ unsigned int start)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned int offset = SIT_BLOCK_OFFSET(sit_i, start);
+ block_t blk_addr = sit_i->sit_base_addr + offset;
+
+ check_seg_range(sbi, start);
+
+ /* calculate sit block address */
+ if (f2fs_test_bit(offset, sit_i->sit_bitmap))
+ blk_addr += sit_i->sit_blocks;
+
+ return blk_addr;
+}
+
+static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi,
+ pgoff_t block_addr)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ block_addr -= sit_i->sit_base_addr;
+ if (block_addr < sit_i->sit_blocks)
+ block_addr += sit_i->sit_blocks;
+ else
+ block_addr -= sit_i->sit_blocks;
+
+ return block_addr + sit_i->sit_base_addr;
+}
+
+static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start)
+{
+ unsigned int block_off = SIT_BLOCK_OFFSET(sit_i, start);
+
+ if (f2fs_test_bit(block_off, sit_i->sit_bitmap))
+ f2fs_clear_bit(block_off, sit_i->sit_bitmap);
+ else
+ f2fs_set_bit(block_off, sit_i->sit_bitmap);
+}
+
+static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ return sit_i->elapsed_time + CURRENT_TIME_SEC.tv_sec -
+ sit_i->mounted_time;
+}
+
+static inline void set_summary(struct f2fs_summary *sum, nid_t nid,
+ unsigned int ofs_in_node, unsigned char version)
+{
+ sum->nid = cpu_to_le32(nid);
+ sum->ofs_in_node = cpu_to_le16(ofs_in_node);
+ sum->version = version;
+}
+
+static inline block_t start_sum_block(struct f2fs_sb_info *sbi)
+{
+ return __start_cp_addr(sbi) +
+ le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
+}
+
+static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type)
+{
+ return __start_cp_addr(sbi) +
+ le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count)
+ - (base + 1) + type;
+}
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
new file mode 100644
index 000000000000..37fad04c8669
--- /dev/null
+++ b/fs/f2fs/super.c
@@ -0,0 +1,701 @@
+/*
+ * fs/f2fs/super.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/statfs.h>
+#include <linux/proc_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/backing-dev.h>
+#include <linux/kthread.h>
+#include <linux/parser.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include <linux/random.h>
+#include <linux/exportfs.h>
+#include <linux/f2fs_fs.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "xattr.h"
+
+static struct kmem_cache *f2fs_inode_cachep;
+
+enum {
+ Opt_gc_background_off,
+ Opt_disable_roll_forward,
+ Opt_discard,
+ Opt_noheap,
+ Opt_nouser_xattr,
+ Opt_noacl,
+ Opt_active_logs,
+ Opt_disable_ext_identify,
+ Opt_err,
+};
+
+static match_table_t f2fs_tokens = {
+ {Opt_gc_background_off, "background_gc_off"},
+ {Opt_disable_roll_forward, "disable_roll_forward"},
+ {Opt_discard, "discard"},
+ {Opt_noheap, "no_heap"},
+ {Opt_nouser_xattr, "nouser_xattr"},
+ {Opt_noacl, "noacl"},
+ {Opt_active_logs, "active_logs=%u"},
+ {Opt_disable_ext_identify, "disable_ext_identify"},
+ {Opt_err, NULL},
+};
+
+void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+ printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
+ va_end(args);
+}
+
+static void init_once(void *foo)
+{
+ struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
+
+ inode_init_once(&fi->vfs_inode);
+}
+
+static struct inode *f2fs_alloc_inode(struct super_block *sb)
+{
+ struct f2fs_inode_info *fi;
+
+ fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO);
+ if (!fi)
+ return NULL;
+
+ init_once((void *) fi);
+
+ /* Initilize f2fs-specific inode info */
+ fi->vfs_inode.i_version = 1;
+ atomic_set(&fi->dirty_dents, 0);
+ fi->i_current_depth = 1;
+ fi->i_advise = 0;
+ rwlock_init(&fi->ext.ext_lock);
+
+ set_inode_flag(fi, FI_NEW_INODE);
+
+ return &fi->vfs_inode;
+}
+
+static void f2fs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
+}
+
+static void f2fs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, f2fs_i_callback);
+}
+
+static void f2fs_put_super(struct super_block *sb)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+
+ f2fs_destroy_stats(sbi);
+ stop_gc_thread(sbi);
+
+ write_checkpoint(sbi, false, true);
+
+ iput(sbi->node_inode);
+ iput(sbi->meta_inode);
+
+ /* destroy f2fs internal modules */
+ destroy_node_manager(sbi);
+ destroy_segment_manager(sbi);
+
+ kfree(sbi->ckpt);
+
+ sb->s_fs_info = NULL;
+ brelse(sbi->raw_super_buf);
+ kfree(sbi);
+}
+
+int f2fs_sync_fs(struct super_block *sb, int sync)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+
+ if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES))
+ return 0;
+
+ if (sync)
+ write_checkpoint(sbi, false, false);
+ else
+ f2fs_balance_fs(sbi);
+
+ return 0;
+}
+
+static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct super_block *sb = dentry->d_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
+ block_t total_count, user_block_count, start_count, ovp_count;
+
+ total_count = le64_to_cpu(sbi->raw_super->block_count);
+ user_block_count = sbi->user_block_count;
+ start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
+ ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
+ buf->f_type = F2FS_SUPER_MAGIC;
+ buf->f_bsize = sbi->blocksize;
+
+ buf->f_blocks = total_count - start_count;
+ buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
+ buf->f_bavail = user_block_count - valid_user_blocks(sbi);
+
+ buf->f_files = sbi->total_node_count;
+ buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi);
+
+ buf->f_namelen = F2FS_MAX_NAME_LEN;
+ buf->f_fsid.val[0] = (u32)id;
+ buf->f_fsid.val[1] = (u32)(id >> 32);
+
+ return 0;
+}
+
+static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
+
+ if (test_opt(sbi, BG_GC))
+ seq_puts(seq, ",background_gc_on");
+ else
+ seq_puts(seq, ",background_gc_off");
+ if (test_opt(sbi, DISABLE_ROLL_FORWARD))
+ seq_puts(seq, ",disable_roll_forward");
+ if (test_opt(sbi, DISCARD))
+ seq_puts(seq, ",discard");
+ if (test_opt(sbi, NOHEAP))
+ seq_puts(seq, ",no_heap_alloc");
+#ifdef CONFIG_F2FS_FS_XATTR
+ if (test_opt(sbi, XATTR_USER))
+ seq_puts(seq, ",user_xattr");
+ else
+ seq_puts(seq, ",nouser_xattr");
+#endif
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+ if (test_opt(sbi, POSIX_ACL))
+ seq_puts(seq, ",acl");
+ else
+ seq_puts(seq, ",noacl");
+#endif
+ if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
+ seq_puts(seq, ",disable_ext_indentify");
+
+ seq_printf(seq, ",active_logs=%u", sbi->active_logs);
+
+ return 0;
+}
+
+static struct super_operations f2fs_sops = {
+ .alloc_inode = f2fs_alloc_inode,
+ .destroy_inode = f2fs_destroy_inode,
+ .write_inode = f2fs_write_inode,
+ .show_options = f2fs_show_options,
+ .evict_inode = f2fs_evict_inode,
+ .put_super = f2fs_put_super,
+ .sync_fs = f2fs_sync_fs,
+ .statfs = f2fs_statfs,
+};
+
+static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
+ u64 ino, u32 generation)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode;
+
+ if (ino < F2FS_ROOT_INO(sbi))
+ return ERR_PTR(-ESTALE);
+
+ /*
+ * f2fs_iget isn't quite right if the inode is currently unallocated!
+ * However f2fs_iget currently does appropriate checks to handle stale
+ * inodes so everything is OK.
+ */
+ inode = f2fs_iget(sb, ino);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+ if (generation && inode->i_generation != generation) {
+ /* we didn't find the right inode.. */
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
+ return inode;
+}
+
+static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
+ f2fs_nfs_get_inode);
+}
+
+static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
+ int fh_len, int fh_type)
+{
+ return generic_fh_to_parent(sb, fid, fh_len, fh_type,
+ f2fs_nfs_get_inode);
+}
+
+static const struct export_operations f2fs_export_ops = {
+ .fh_to_dentry = f2fs_fh_to_dentry,
+ .fh_to_parent = f2fs_fh_to_parent,
+ .get_parent = f2fs_get_parent,
+};
+
+static int parse_options(struct super_block *sb, struct f2fs_sb_info *sbi,
+ char *options)
+{
+ substring_t args[MAX_OPT_ARGS];
+ char *p;
+ int arg = 0;
+
+ if (!options)
+ return 0;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+ if (!*p)
+ continue;
+ /*
+ * Initialize args struct so we know whether arg was
+ * found; some options take optional arguments.
+ */
+ args[0].to = args[0].from = NULL;
+ token = match_token(p, f2fs_tokens, args);
+
+ switch (token) {
+ case Opt_gc_background_off:
+ clear_opt(sbi, BG_GC);
+ break;
+ case Opt_disable_roll_forward:
+ set_opt(sbi, DISABLE_ROLL_FORWARD);
+ break;
+ case Opt_discard:
+ set_opt(sbi, DISCARD);
+ break;
+ case Opt_noheap:
+ set_opt(sbi, NOHEAP);
+ break;
+#ifdef CONFIG_F2FS_FS_XATTR
+ case Opt_nouser_xattr:
+ clear_opt(sbi, XATTR_USER);
+ break;
+#else
+ case Opt_nouser_xattr:
+ f2fs_msg(sb, KERN_INFO,
+ "nouser_xattr options not supported");
+ break;
+#endif
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+ case Opt_noacl:
+ clear_opt(sbi, POSIX_ACL);
+ break;
+#else
+ case Opt_noacl:
+ f2fs_msg(sb, KERN_INFO, "noacl options not supported");
+ break;
+#endif
+ case Opt_active_logs:
+ if (args->from && match_int(args, &arg))
+ return -EINVAL;
+ if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
+ return -EINVAL;
+ sbi->active_logs = arg;
+ break;
+ case Opt_disable_ext_identify:
+ set_opt(sbi, DISABLE_EXT_IDENTIFY);
+ break;
+ default:
+ f2fs_msg(sb, KERN_ERR,
+ "Unrecognized mount option \"%s\" or missing value",
+ p);
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+static loff_t max_file_size(unsigned bits)
+{
+ loff_t result = ADDRS_PER_INODE;
+ loff_t leaf_count = ADDRS_PER_BLOCK;
+
+ /* two direct node blocks */
+ result += (leaf_count * 2);
+
+ /* two indirect node blocks */
+ leaf_count *= NIDS_PER_BLOCK;
+ result += (leaf_count * 2);
+
+ /* one double indirect node block */
+ leaf_count *= NIDS_PER_BLOCK;
+ result += leaf_count;
+
+ result <<= bits;
+ return result;
+}
+
+static int sanity_check_raw_super(struct super_block *sb,
+ struct f2fs_super_block *raw_super)
+{
+ unsigned int blocksize;
+
+ if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
+ f2fs_msg(sb, KERN_INFO,
+ "Magic Mismatch, valid(0x%x) - read(0x%x)",
+ F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
+ return 1;
+ }
+
+ /* Currently, support only 4KB block size */
+ blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
+ if (blocksize != PAGE_CACHE_SIZE) {
+ f2fs_msg(sb, KERN_INFO,
+ "Invalid blocksize (%u), supports only 4KB\n",
+ blocksize);
+ return 1;
+ }
+ if (le32_to_cpu(raw_super->log_sectorsize) !=
+ F2FS_LOG_SECTOR_SIZE) {
+ f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
+ return 1;
+ }
+ if (le32_to_cpu(raw_super->log_sectors_per_block) !=
+ F2FS_LOG_SECTORS_PER_BLOCK) {
+ f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block");
+ return 1;
+ }
+ return 0;
+}
+
+static int sanity_check_ckpt(struct f2fs_super_block *raw_super,
+ struct f2fs_checkpoint *ckpt)
+{
+ unsigned int total, fsmeta;
+
+ total = le32_to_cpu(raw_super->segment_count);
+ fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
+ fsmeta += le32_to_cpu(raw_super->segment_count_sit);
+ fsmeta += le32_to_cpu(raw_super->segment_count_nat);
+ fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
+ fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
+
+ if (fsmeta >= total)
+ return 1;
+ return 0;
+}
+
+static void init_sb_info(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_super_block *raw_super = sbi->raw_super;
+ int i;
+
+ sbi->log_sectors_per_block =
+ le32_to_cpu(raw_super->log_sectors_per_block);
+ sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
+ sbi->blocksize = 1 << sbi->log_blocksize;
+ sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
+ sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
+ sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
+ sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
+ sbi->total_sections = le32_to_cpu(raw_super->section_count);
+ sbi->total_node_count =
+ (le32_to_cpu(raw_super->segment_count_nat) / 2)
+ * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
+ sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
+ sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
+ sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
+
+ for (i = 0; i < NR_COUNT_TYPE; i++)
+ atomic_set(&sbi->nr_pages[i], 0);
+}
+
+static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct f2fs_sb_info *sbi;
+ struct f2fs_super_block *raw_super;
+ struct buffer_head *raw_super_buf;
+ struct inode *root;
+ long err = -EINVAL;
+ int i;
+
+ /* allocate memory for f2fs-specific super block info */
+ sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
+ if (!sbi)
+ return -ENOMEM;
+
+ /* set a block size */
+ if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) {
+ f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
+ goto free_sbi;
+ }
+
+ /* read f2fs raw super block */
+ raw_super_buf = sb_bread(sb, 0);
+ if (!raw_super_buf) {
+ err = -EIO;
+ f2fs_msg(sb, KERN_ERR, "unable to read superblock");
+ goto free_sbi;
+ }
+ raw_super = (struct f2fs_super_block *)
+ ((char *)raw_super_buf->b_data + F2FS_SUPER_OFFSET);
+
+ /* init some FS parameters */
+ sbi->active_logs = NR_CURSEG_TYPE;
+
+ set_opt(sbi, BG_GC);
+
+#ifdef CONFIG_F2FS_FS_XATTR
+ set_opt(sbi, XATTR_USER);
+#endif
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+ set_opt(sbi, POSIX_ACL);
+#endif
+ /* parse mount options */
+ if (parse_options(sb, sbi, (char *)data))
+ goto free_sb_buf;
+
+ /* sanity checking of raw super */
+ if (sanity_check_raw_super(sb, raw_super)) {
+ f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem");
+ goto free_sb_buf;
+ }
+
+ sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
+ sb->s_max_links = F2FS_LINK_MAX;
+ get_random_bytes(&sbi->s_next_generation, sizeof(u32));
+
+ sb->s_op = &f2fs_sops;
+ sb->s_xattr = f2fs_xattr_handlers;
+ sb->s_export_op = &f2fs_export_ops;
+ sb->s_magic = F2FS_SUPER_MAGIC;
+ sb->s_fs_info = sbi;
+ sb->s_time_gran = 1;
+ sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
+ (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
+ memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
+
+ /* init f2fs-specific super block info */
+ sbi->sb = sb;
+ sbi->raw_super = raw_super;
+ sbi->raw_super_buf = raw_super_buf;
+ mutex_init(&sbi->gc_mutex);
+ mutex_init(&sbi->write_inode);
+ mutex_init(&sbi->writepages);
+ mutex_init(&sbi->cp_mutex);
+ for (i = 0; i < NR_LOCK_TYPE; i++)
+ mutex_init(&sbi->fs_lock[i]);
+ sbi->por_doing = 0;
+ spin_lock_init(&sbi->stat_lock);
+ init_rwsem(&sbi->bio_sem);
+ init_sb_info(sbi);
+
+ /* get an inode for meta space */
+ sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
+ if (IS_ERR(sbi->meta_inode)) {
+ f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
+ err = PTR_ERR(sbi->meta_inode);
+ goto free_sb_buf;
+ }
+
+ err = get_valid_checkpoint(sbi);
+ if (err) {
+ f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
+ goto free_meta_inode;
+ }
+
+ /* sanity checking of checkpoint */
+ err = -EINVAL;
+ if (sanity_check_ckpt(raw_super, sbi->ckpt)) {
+ f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
+ goto free_cp;
+ }
+
+ sbi->total_valid_node_count =
+ le32_to_cpu(sbi->ckpt->valid_node_count);
+ sbi->total_valid_inode_count =
+ le32_to_cpu(sbi->ckpt->valid_inode_count);
+ sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
+ sbi->total_valid_block_count =
+ le64_to_cpu(sbi->ckpt->valid_block_count);
+ sbi->last_valid_block_count = sbi->total_valid_block_count;
+ sbi->alloc_valid_block_count = 0;
+ INIT_LIST_HEAD(&sbi->dir_inode_list);
+ spin_lock_init(&sbi->dir_inode_lock);
+
+ init_orphan_info(sbi);
+
+ /* setup f2fs internal modules */
+ err = build_segment_manager(sbi);
+ if (err) {
+ f2fs_msg(sb, KERN_ERR,
+ "Failed to initialize F2FS segment manager");
+ goto free_sm;
+ }
+ err = build_node_manager(sbi);
+ if (err) {
+ f2fs_msg(sb, KERN_ERR,
+ "Failed to initialize F2FS node manager");
+ goto free_nm;
+ }
+
+ build_gc_manager(sbi);
+
+ /* get an inode for node space */
+ sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
+ if (IS_ERR(sbi->node_inode)) {
+ f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
+ err = PTR_ERR(sbi->node_inode);
+ goto free_nm;
+ }
+
+ /* if there are nt orphan nodes free them */
+ err = -EINVAL;
+ if (recover_orphan_inodes(sbi))
+ goto free_node_inode;
+
+ /* read root inode and dentry */
+ root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
+ if (IS_ERR(root)) {
+ f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
+ err = PTR_ERR(root);
+ goto free_node_inode;
+ }
+ if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size)
+ goto free_root_inode;
+
+ sb->s_root = d_make_root(root); /* allocate root dentry */
+ if (!sb->s_root) {
+ err = -ENOMEM;
+ goto free_root_inode;
+ }
+
+ /* recover fsynced data */
+ if (!test_opt(sbi, DISABLE_ROLL_FORWARD))
+ recover_fsync_data(sbi);
+
+ /* After POR, we can run background GC thread */
+ err = start_gc_thread(sbi);
+ if (err)
+ goto fail;
+
+ err = f2fs_build_stats(sbi);
+ if (err)
+ goto fail;
+
+ return 0;
+fail:
+ stop_gc_thread(sbi);
+free_root_inode:
+ dput(sb->s_root);
+ sb->s_root = NULL;
+free_node_inode:
+ iput(sbi->node_inode);
+free_nm:
+ destroy_node_manager(sbi);
+free_sm:
+ destroy_segment_manager(sbi);
+free_cp:
+ kfree(sbi->ckpt);
+free_meta_inode:
+ make_bad_inode(sbi->meta_inode);
+ iput(sbi->meta_inode);
+free_sb_buf:
+ brelse(raw_super_buf);
+free_sbi:
+ kfree(sbi);
+ return err;
+}
+
+static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
+}
+
+static struct file_system_type f2fs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "f2fs",
+ .mount = f2fs_mount,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+
+static int __init init_inodecache(void)
+{
+ f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
+ sizeof(struct f2fs_inode_info), NULL);
+ if (f2fs_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void destroy_inodecache(void)
+{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(f2fs_inode_cachep);
+}
+
+static int __init init_f2fs_fs(void)
+{
+ int err;
+
+ err = init_inodecache();
+ if (err)
+ goto fail;
+ err = create_node_manager_caches();
+ if (err)
+ goto fail;
+ err = create_gc_caches();
+ if (err)
+ goto fail;
+ err = create_checkpoint_caches();
+ if (err)
+ goto fail;
+ err = register_filesystem(&f2fs_fs_type);
+ if (err)
+ goto fail;
+ f2fs_create_root_stats();
+fail:
+ return err;
+}
+
+static void __exit exit_f2fs_fs(void)
+{
+ f2fs_destroy_root_stats();
+ unregister_filesystem(&f2fs_fs_type);
+ destroy_checkpoint_caches();
+ destroy_gc_caches();
+ destroy_node_manager_caches();
+ destroy_inodecache();
+}
+
+module_init(init_f2fs_fs)
+module_exit(exit_f2fs_fs)
+
+MODULE_AUTHOR("Samsung Electronics's Praesto Team");
+MODULE_DESCRIPTION("Flash Friendly File System");
+MODULE_LICENSE("GPL");
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
new file mode 100644
index 000000000000..8038c0496504
--- /dev/null
+++ b/fs/f2fs/xattr.c
@@ -0,0 +1,443 @@
+/*
+ * fs/f2fs/xattr.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Portions of this code from linux/fs/ext2/xattr.c
+ *
+ * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de>
+ *
+ * Fix by Harrison Xing <harrison@mountainviewdata.com>.
+ * Extended attributes for symlinks and special files added per
+ * suggestion of Luka Renko <luka.renko@hermes.si>.
+ * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>,
+ * Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/rwsem.h>
+#include <linux/f2fs_fs.h>
+#include "f2fs.h"
+#include "xattr.h"
+
+static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list,
+ size_t list_size, const char *name, size_t name_len, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+ int total_len, prefix_len = 0;
+ const char *prefix = NULL;
+
+ switch (type) {
+ case F2FS_XATTR_INDEX_USER:
+ if (!test_opt(sbi, XATTR_USER))
+ return -EOPNOTSUPP;
+ prefix = XATTR_USER_PREFIX;
+ prefix_len = XATTR_USER_PREFIX_LEN;
+ break;
+ case F2FS_XATTR_INDEX_TRUSTED:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ prefix = XATTR_TRUSTED_PREFIX;
+ prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ total_len = prefix_len + name_len + 1;
+ if (list && total_len <= list_size) {
+ memcpy(list, prefix, prefix_len);
+ memcpy(list+prefix_len, name, name_len);
+ list[prefix_len + name_len] = '\0';
+ }
+ return total_len;
+}
+
+static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+
+ switch (type) {
+ case F2FS_XATTR_INDEX_USER:
+ if (!test_opt(sbi, XATTR_USER))
+ return -EOPNOTSUPP;
+ break;
+ case F2FS_XATTR_INDEX_TRUSTED:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return f2fs_getxattr(dentry->d_inode, type, name,
+ buffer, size);
+}
+
+static int f2fs_xattr_generic_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
+
+ switch (type) {
+ case F2FS_XATTR_INDEX_USER:
+ if (!test_opt(sbi, XATTR_USER))
+ return -EOPNOTSUPP;
+ break;
+ case F2FS_XATTR_INDEX_TRUSTED:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+
+ return f2fs_setxattr(dentry->d_inode, type, name, value, size);
+}
+
+static size_t f2fs_xattr_advise_list(struct dentry *dentry, char *list,
+ size_t list_size, const char *name, size_t name_len, int type)
+{
+ const char *xname = F2FS_SYSTEM_ADVISE_PREFIX;
+ size_t size;
+
+ if (type != F2FS_XATTR_INDEX_ADVISE)
+ return 0;
+
+ size = strlen(xname) + 1;
+ if (list && size <= list_size)
+ memcpy(list, xname, size);
+ return size;
+}
+
+static int f2fs_xattr_advise_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ struct inode *inode = dentry->d_inode;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+
+ *((char *)buffer) = F2FS_I(inode)->i_advise;
+ return sizeof(char);
+}
+
+static int f2fs_xattr_advise_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int type)
+{
+ struct inode *inode = dentry->d_inode;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (!inode_owner_or_capable(inode))
+ return -EPERM;
+ if (value == NULL)
+ return -EINVAL;
+
+ F2FS_I(inode)->i_advise |= *(char *)value;
+ return 0;
+}
+
+const struct xattr_handler f2fs_xattr_user_handler = {
+ .prefix = XATTR_USER_PREFIX,
+ .flags = F2FS_XATTR_INDEX_USER,
+ .list = f2fs_xattr_generic_list,
+ .get = f2fs_xattr_generic_get,
+ .set = f2fs_xattr_generic_set,
+};
+
+const struct xattr_handler f2fs_xattr_trusted_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .flags = F2FS_XATTR_INDEX_TRUSTED,
+ .list = f2fs_xattr_generic_list,
+ .get = f2fs_xattr_generic_get,
+ .set = f2fs_xattr_generic_set,
+};
+
+const struct xattr_handler f2fs_xattr_advise_handler = {
+ .prefix = F2FS_SYSTEM_ADVISE_PREFIX,
+ .flags = F2FS_XATTR_INDEX_ADVISE,
+ .list = f2fs_xattr_advise_list,
+ .get = f2fs_xattr_advise_get,
+ .set = f2fs_xattr_advise_set,
+};
+
+static const struct xattr_handler *f2fs_xattr_handler_map[] = {
+ [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+ [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &f2fs_xattr_acl_access_handler,
+ [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &f2fs_xattr_acl_default_handler,
+#endif
+ [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
+ [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler,
+};
+
+const struct xattr_handler *f2fs_xattr_handlers[] = {
+ &f2fs_xattr_user_handler,
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+ &f2fs_xattr_acl_access_handler,
+ &f2fs_xattr_acl_default_handler,
+#endif
+ &f2fs_xattr_trusted_handler,
+ &f2fs_xattr_advise_handler,
+ NULL,
+};
+
+static inline const struct xattr_handler *f2fs_xattr_handler(int name_index)
+{
+ const struct xattr_handler *handler = NULL;
+
+ if (name_index > 0 && name_index < ARRAY_SIZE(f2fs_xattr_handler_map))
+ handler = f2fs_xattr_handler_map[name_index];
+ return handler;
+}
+
+int f2fs_getxattr(struct inode *inode, int name_index, const char *name,
+ void *buffer, size_t buffer_size)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct f2fs_xattr_entry *entry;
+ struct page *page;
+ void *base_addr;
+ int error = 0, found = 0;
+ size_t value_len, name_len;
+
+ if (name == NULL)
+ return -EINVAL;
+ name_len = strlen(name);
+
+ if (!fi->i_xattr_nid)
+ return -ENODATA;
+
+ page = get_node_page(sbi, fi->i_xattr_nid);
+ base_addr = page_address(page);
+
+ list_for_each_xattr(entry, base_addr) {
+ if (entry->e_name_index != name_index)
+ continue;
+ if (entry->e_name_len != name_len)
+ continue;
+ if (!memcmp(entry->e_name, name, name_len)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ error = -ENODATA;
+ goto cleanup;
+ }
+
+ value_len = le16_to_cpu(entry->e_value_size);
+
+ if (buffer && value_len > buffer_size) {
+ error = -ERANGE;
+ goto cleanup;
+ }
+
+ if (buffer) {
+ char *pval = entry->e_name + entry->e_name_len;
+ memcpy(buffer, pval, value_len);
+ }
+ error = value_len;
+
+cleanup:
+ f2fs_put_page(page, 1);
+ return error;
+}
+
+ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
+{
+ struct inode *inode = dentry->d_inode;
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct f2fs_xattr_entry *entry;
+ struct page *page;
+ void *base_addr;
+ int error = 0;
+ size_t rest = buffer_size;
+
+ if (!fi->i_xattr_nid)
+ return 0;
+
+ page = get_node_page(sbi, fi->i_xattr_nid);
+ base_addr = page_address(page);
+
+ list_for_each_xattr(entry, base_addr) {
+ const struct xattr_handler *handler =
+ f2fs_xattr_handler(entry->e_name_index);
+ size_t size;
+
+ if (!handler)
+ continue;
+
+ size = handler->list(dentry, buffer, rest, entry->e_name,
+ entry->e_name_len, handler->flags);
+ if (buffer && size > rest) {
+ error = -ERANGE;
+ goto cleanup;
+ }
+
+ if (buffer)
+ buffer += size;
+ rest -= size;
+ }
+ error = buffer_size - rest;
+cleanup:
+ f2fs_put_page(page, 1);
+ return error;
+}
+
+int f2fs_setxattr(struct inode *inode, int name_index, const char *name,
+ const void *value, size_t value_len)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct f2fs_xattr_header *header = NULL;
+ struct f2fs_xattr_entry *here, *last;
+ struct page *page;
+ void *base_addr;
+ int error, found, free, newsize;
+ size_t name_len;
+ char *pval;
+
+ if (name == NULL)
+ return -EINVAL;
+ name_len = strlen(name);
+
+ if (value == NULL)
+ value_len = 0;
+
+ if (name_len > 255 || value_len > MAX_VALUE_LEN)
+ return -ERANGE;
+
+ f2fs_balance_fs(sbi);
+
+ mutex_lock_op(sbi, NODE_NEW);
+ if (!fi->i_xattr_nid) {
+ /* Allocate new attribute block */
+ struct dnode_of_data dn;
+
+ if (!alloc_nid(sbi, &fi->i_xattr_nid)) {
+ mutex_unlock_op(sbi, NODE_NEW);
+ return -ENOSPC;
+ }
+ set_new_dnode(&dn, inode, NULL, NULL, fi->i_xattr_nid);
+ mark_inode_dirty(inode);
+
+ page = new_node_page(&dn, XATTR_NODE_OFFSET);
+ if (IS_ERR(page)) {
+ alloc_nid_failed(sbi, fi->i_xattr_nid);
+ fi->i_xattr_nid = 0;
+ mutex_unlock_op(sbi, NODE_NEW);
+ return PTR_ERR(page);
+ }
+
+ alloc_nid_done(sbi, fi->i_xattr_nid);
+ base_addr = page_address(page);
+ header = XATTR_HDR(base_addr);
+ header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC);
+ header->h_refcount = cpu_to_le32(1);
+ } else {
+ /* The inode already has an extended attribute block. */
+ page = get_node_page(sbi, fi->i_xattr_nid);
+ if (IS_ERR(page)) {
+ mutex_unlock_op(sbi, NODE_NEW);
+ return PTR_ERR(page);
+ }
+
+ base_addr = page_address(page);
+ header = XATTR_HDR(base_addr);
+ }
+
+ if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) {
+ error = -EIO;
+ goto cleanup;
+ }
+
+ /* find entry with wanted name. */
+ found = 0;
+ list_for_each_xattr(here, base_addr) {
+ if (here->e_name_index != name_index)
+ continue;
+ if (here->e_name_len != name_len)
+ continue;
+ if (!memcmp(here->e_name, name, name_len)) {
+ found = 1;
+ break;
+ }
+ }
+
+ last = here;
+
+ while (!IS_XATTR_LAST_ENTRY(last))
+ last = XATTR_NEXT_ENTRY(last);
+
+ newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) +
+ name_len + value_len);
+
+ /* 1. Check space */
+ if (value) {
+ /* If value is NULL, it is remove operation.
+ * In case of update operation, we caculate free.
+ */
+ free = MIN_OFFSET - ((char *)last - (char *)header);
+ if (found)
+ free = free - ENTRY_SIZE(here);
+
+ if (free < newsize) {
+ error = -ENOSPC;
+ goto cleanup;
+ }
+ }
+
+ /* 2. Remove old entry */
+ if (found) {
+ /* If entry is found, remove old entry.
+ * If not found, remove operation is not needed.
+ */
+ struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here);
+ int oldsize = ENTRY_SIZE(here);
+
+ memmove(here, next, (char *)last - (char *)next);
+ last = (struct f2fs_xattr_entry *)((char *)last - oldsize);
+ memset(last, 0, oldsize);
+ }
+
+ /* 3. Write new entry */
+ if (value) {
+ /* Before we come here, old entry is removed.
+ * We just write new entry. */
+ memset(last, 0, newsize);
+ last->e_name_index = name_index;
+ last->e_name_len = name_len;
+ memcpy(last->e_name, name, name_len);
+ pval = last->e_name + name_len;
+ memcpy(pval, value, value_len);
+ last->e_value_size = cpu_to_le16(value_len);
+ }
+
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+
+ if (is_inode_flag_set(fi, FI_ACL_MODE)) {
+ inode->i_mode = fi->i_acl_mode;
+ inode->i_ctime = CURRENT_TIME;
+ clear_inode_flag(fi, FI_ACL_MODE);
+ }
+ f2fs_write_inode(inode, NULL);
+ mutex_unlock_op(sbi, NODE_NEW);
+
+ return 0;
+cleanup:
+ f2fs_put_page(page, 1);
+ mutex_unlock_op(sbi, NODE_NEW);
+ return error;
+}
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h
new file mode 100644
index 000000000000..49c9558305e3
--- /dev/null
+++ b/fs/f2fs/xattr.h
@@ -0,0 +1,145 @@
+/*
+ * fs/f2fs/xattr.h
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Portions of this code from linux/fs/ext2/xattr.h
+ *
+ * On-disk format of extended attributes for the ext2 filesystem.
+ *
+ * (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __F2FS_XATTR_H__
+#define __F2FS_XATTR_H__
+
+#include <linux/init.h>
+#include <linux/xattr.h>
+
+/* Magic value in attribute blocks */
+#define F2FS_XATTR_MAGIC 0xF2F52011
+
+/* Maximum number of references to one attribute block */
+#define F2FS_XATTR_REFCOUNT_MAX 1024
+
+/* Name indexes */
+#define F2FS_SYSTEM_ADVISE_PREFIX "system.advise"
+#define F2FS_XATTR_INDEX_USER 1
+#define F2FS_XATTR_INDEX_POSIX_ACL_ACCESS 2
+#define F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT 3
+#define F2FS_XATTR_INDEX_TRUSTED 4
+#define F2FS_XATTR_INDEX_LUSTRE 5
+#define F2FS_XATTR_INDEX_SECURITY 6
+#define F2FS_XATTR_INDEX_ADVISE 7
+
+struct f2fs_xattr_header {
+ __le32 h_magic; /* magic number for identification */
+ __le32 h_refcount; /* reference count */
+ __u32 h_reserved[4]; /* zero right now */
+};
+
+struct f2fs_xattr_entry {
+ __u8 e_name_index;
+ __u8 e_name_len;
+ __le16 e_value_size; /* size of attribute value */
+ char e_name[0]; /* attribute name */
+};
+
+#define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr))
+#define XATTR_ENTRY(ptr) ((struct f2fs_xattr_entry *)(ptr))
+#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr)+1))
+#define XATTR_ROUND (3)
+
+#define XATTR_ALIGN(size) ((size + XATTR_ROUND) & ~XATTR_ROUND)
+
+#define ENTRY_SIZE(entry) (XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + \
+ entry->e_name_len + le16_to_cpu(entry->e_value_size)))
+
+#define XATTR_NEXT_ENTRY(entry) ((struct f2fs_xattr_entry *)((char *)(entry) +\
+ ENTRY_SIZE(entry)))
+
+#define IS_XATTR_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
+
+#define list_for_each_xattr(entry, addr) \
+ for (entry = XATTR_FIRST_ENTRY(addr);\
+ !IS_XATTR_LAST_ENTRY(entry);\
+ entry = XATTR_NEXT_ENTRY(entry))
+
+
+#define MIN_OFFSET XATTR_ALIGN(PAGE_SIZE - \
+ sizeof(struct node_footer) - \
+ sizeof(__u32))
+
+#define MAX_VALUE_LEN (MIN_OFFSET - sizeof(struct f2fs_xattr_header) - \
+ sizeof(struct f2fs_xattr_entry))
+
+/*
+ * On-disk structure of f2fs_xattr
+ * We use only 1 block for xattr.
+ *
+ * +--------------------+
+ * | f2fs_xattr_header |
+ * | |
+ * +--------------------+
+ * | f2fs_xattr_entry |
+ * | .e_name_index = 1 |
+ * | .e_name_len = 3 |
+ * | .e_value_size = 14 |
+ * | .e_name = "foo" |
+ * | "value_of_xattr" |<- value_offs = e_name + e_name_len
+ * +--------------------+
+ * | f2fs_xattr_entry |
+ * | .e_name_index = 4 |
+ * | .e_name = "bar" |
+ * +--------------------+
+ * | |
+ * | Free |
+ * | |
+ * +--------------------+<- MIN_OFFSET
+ * | node_footer |
+ * | (nid, ino, offset) |
+ * +--------------------+
+ *
+ **/
+
+#ifdef CONFIG_F2FS_FS_XATTR
+extern const struct xattr_handler f2fs_xattr_user_handler;
+extern const struct xattr_handler f2fs_xattr_trusted_handler;
+extern const struct xattr_handler f2fs_xattr_acl_access_handler;
+extern const struct xattr_handler f2fs_xattr_acl_default_handler;
+extern const struct xattr_handler f2fs_xattr_advise_handler;
+
+extern const struct xattr_handler *f2fs_xattr_handlers[];
+
+extern int f2fs_setxattr(struct inode *inode, int name_index, const char *name,
+ const void *value, size_t value_len);
+extern int f2fs_getxattr(struct inode *inode, int name_index, const char *name,
+ void *buffer, size_t buffer_size);
+extern ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer,
+ size_t buffer_size);
+
+#else
+
+#define f2fs_xattr_handlers NULL
+static inline int f2fs_setxattr(struct inode *inode, int name_index,
+ const char *name, const void *value, size_t value_len)
+{
+ return -EOPNOTSUPP;
+}
+static inline int f2fs_getxattr(struct inode *inode, int name_index,
+ const char *name, void *buffer, size_t buffer_size)
+{
+ return -EOPNOTSUPP;
+}
+static inline ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer,
+ size_t buffer_size)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
+#endif /* __F2FS_XATTR_H__ */
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 2a182342442e..58bf744dbf39 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -461,8 +461,7 @@ static int fat_parse_short(struct super_block *sb,
}
/*
- * Return values: negative -> error, 0 -> not found, positive -> found,
- * value is the total amount of slots, including the shortname entry.
+ * Return values: negative -> error/not found, 0 -> found.
*/
int fat_search_long(struct inode *inode, const unsigned char *name,
int name_len, struct fat_slot_info *sinfo)
@@ -1255,7 +1254,7 @@ int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
sinfo->nr_slots = nr_slots;
- /* First stage: search free direcotry entries */
+ /* First stage: search free directory entries */
free_slots = nr_bhs = 0;
bh = prev = NULL;
pos = 0;
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 623f36f0423b..12701a567752 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -29,6 +29,7 @@ struct fat_mount_options {
unsigned short fs_fmask;
unsigned short fs_dmask;
unsigned short codepage; /* Codepage for shortname conversions */
+ int time_offset; /* Offset of timestamps from UTC (in minutes) */
char *iocharset; /* Charset used for filename input/display */
unsigned short shortname; /* flags for shortname display/create rule */
unsigned char name_check; /* r = relaxed, n = normal, s = strict */
@@ -45,7 +46,7 @@ struct fat_mount_options {
flush:1, /* write things quickly */
nocase:1, /* Does this need case conversion? 0=need case conversion*/
usefree:1, /* Use free_clusters for FAT32 */
- tz_utc:1, /* Filesystem timestamps are in UTC */
+ tz_set:1, /* Filesystem timestamps' offset set */
rodir:1, /* allow ATTR_RO for directory */
discard:1, /* Issue discard requests on deletions */
nfs:1; /* Do extra work needed for NFS export */
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 5bafaad00530..f8f491677a4a 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -26,6 +26,7 @@
#include <linux/writeback.h>
#include <linux/log2.h>
#include <linux/hash.h>
+#include <linux/blkdev.h>
#include <asm/unaligned.h>
#include "fat.h"
@@ -725,7 +726,8 @@ static int fat_show_options(struct seq_file *m, struct dentry *root)
if (opts->allow_utime)
seq_printf(m, ",allow_utime=%04o", opts->allow_utime);
if (sbi->nls_disk)
- seq_printf(m, ",codepage=%s", sbi->nls_disk->charset);
+ /* strip "cp" prefix from displayed option */
+ seq_printf(m, ",codepage=%s", &sbi->nls_disk->charset[2]);
if (isvfat) {
if (sbi->nls_io)
seq_printf(m, ",iocharset=%s", sbi->nls_io->charset);
@@ -777,8 +779,12 @@ static int fat_show_options(struct seq_file *m, struct dentry *root)
}
if (opts->flush)
seq_puts(m, ",flush");
- if (opts->tz_utc)
- seq_puts(m, ",tz=UTC");
+ if (opts->tz_set) {
+ if (opts->time_offset)
+ seq_printf(m, ",time_offset=%d", opts->time_offset);
+ else
+ seq_puts(m, ",tz=UTC");
+ }
if (opts->errors == FAT_ERRORS_CONT)
seq_puts(m, ",errors=continue");
else if (opts->errors == FAT_ERRORS_PANIC)
@@ -800,7 +806,8 @@ enum {
Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
Opt_obsolete, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont,
- Opt_err_panic, Opt_err_ro, Opt_discard, Opt_nfs, Opt_err,
+ Opt_err_panic, Opt_err_ro, Opt_discard, Opt_nfs, Opt_time_offset,
+ Opt_err,
};
static const match_table_t fat_tokens = {
@@ -825,6 +832,7 @@ static const match_table_t fat_tokens = {
{Opt_immutable, "sys_immutable"},
{Opt_flush, "flush"},
{Opt_tz_utc, "tz=UTC"},
+ {Opt_time_offset, "time_offset=%d"},
{Opt_err_cont, "errors=continue"},
{Opt_err_panic, "errors=panic"},
{Opt_err_ro, "errors=remount-ro"},
@@ -909,7 +917,7 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat,
opts->utf8 = opts->unicode_xlate = 0;
opts->numtail = 1;
opts->usefree = opts->nocase = 0;
- opts->tz_utc = 0;
+ opts->tz_set = 0;
opts->nfs = 0;
opts->errors = FAT_ERRORS_RO;
*debug = 0;
@@ -965,48 +973,57 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat,
break;
case Opt_uid:
if (match_int(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->fs_uid = make_kuid(current_user_ns(), option);
if (!uid_valid(opts->fs_uid))
- return 0;
+ return -EINVAL;
break;
case Opt_gid:
if (match_int(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->fs_gid = make_kgid(current_user_ns(), option);
if (!gid_valid(opts->fs_gid))
- return 0;
+ return -EINVAL;
break;
case Opt_umask:
if (match_octal(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->fs_fmask = opts->fs_dmask = option;
break;
case Opt_dmask:
if (match_octal(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->fs_dmask = option;
break;
case Opt_fmask:
if (match_octal(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->fs_fmask = option;
break;
case Opt_allow_utime:
if (match_octal(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->allow_utime = option & (S_IWGRP | S_IWOTH);
break;
case Opt_codepage:
if (match_int(&args[0], &option))
- return 0;
+ return -EINVAL;
opts->codepage = option;
break;
case Opt_flush:
opts->flush = 1;
break;
+ case Opt_time_offset:
+ if (match_int(&args[0], &option))
+ return -EINVAL;
+ if (option < -12 * 60 || option > 12 * 60)
+ return -EINVAL;
+ opts->tz_set = 1;
+ opts->time_offset = option;
+ break;
case Opt_tz_utc:
- opts->tz_utc = 1;
+ opts->tz_set = 1;
+ opts->time_offset = 0;
break;
case Opt_err_cont:
opts->errors = FAT_ERRORS_CONT;
@@ -1327,7 +1344,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
sbi->dir_entries = get_unaligned_le16(&b->dir_entries);
if (sbi->dir_entries & (sbi->dir_per_block - 1)) {
if (!silent)
- fat_msg(sb, KERN_ERR, "bogus directroy-entries per block"
+ fat_msg(sb, KERN_ERR, "bogus directory-entries per block"
" (%u)", sbi->dir_entries);
brelse(bh);
goto out_invalid;
@@ -1431,6 +1448,14 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
goto out_fail;
}
+ if (sbi->options.discard) {
+ struct request_queue *q = bdev_get_queue(sb->s_bdev);
+ if (!blk_queue_discard(q))
+ fat_msg(sb, KERN_WARNING,
+ "mounting with \"discard\" option, but "
+ "the device does not support discard");
+ }
+
return 0;
out_invalid:
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 6d93360ca0cc..359d307b5507 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -135,6 +135,10 @@ int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster)
}
if (ret < 0)
return ret;
+ /*
+ * FIXME:Although we can add this cache, fat_cache_add() is
+ * assuming to be called after linear search with fat_cache_id.
+ */
// fat_cache_add(inode, new_fclus, new_dclus);
} else {
MSDOS_I(inode)->i_start = new_dclus;
@@ -212,8 +216,10 @@ void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts,
+ days_in_year[month] + day
+ DAYS_DELTA) * SECS_PER_DAY;
- if (!sbi->options.tz_utc)
+ if (!sbi->options.tz_set)
second += sys_tz.tz_minuteswest * SECS_PER_MIN;
+ else
+ second -= sbi->options.time_offset * SECS_PER_MIN;
if (time_cs) {
ts->tv_sec = second + (time_cs / 100);
@@ -229,8 +235,9 @@ void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec *ts,
__le16 *time, __le16 *date, u8 *time_cs)
{
struct tm tm;
- time_to_tm(ts->tv_sec, sbi->options.tz_utc ? 0 :
- -sys_tz.tz_minuteswest * 60, &tm);
+ time_to_tm(ts->tv_sec,
+ (sbi->options.tz_set ? sbi->options.time_offset :
+ -sys_tz.tz_minuteswest) * SECS_PER_MIN, &tm);
/* FAT can only support year between 1980 to 2107 */
if (tm.tm_year < 1980 - 1900) {
diff --git a/fs/fhandle.c b/fs/fhandle.c
index cccdc874bb55..999ff5c3cab0 100644
--- a/fs/fhandle.c
+++ b/fs/fhandle.c
@@ -52,7 +52,7 @@ static long do_sys_name_to_handle(struct path *path,
handle_bytes = handle_dwords * sizeof(u32);
handle->handle_bytes = handle_bytes;
if ((handle->handle_bytes > f_handle.handle_bytes) ||
- (retval == 255) || (retval == -ENOSPC)) {
+ (retval == FILEID_INVALID) || (retval == -ENOSPC)) {
/* As per old exportfs_encode_fh documentation
* we could return ENOSPC to indicate overflow
* But file system returned 255 always. So handle
diff --git a/fs/file.c b/fs/file.c
index d3b5fa80b71b..2b3570b7caeb 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -490,7 +490,7 @@ void exit_files(struct task_struct *tsk)
}
}
-static void __devinit fdtable_defer_list_init(int cpu)
+static void fdtable_defer_list_init(int cpu)
{
struct fdtable_defer *fddef = &per_cpu(fdtable_defer_list, cpu);
spin_lock_init(&fddef->lock);
@@ -519,12 +519,6 @@ struct files_struct init_files = {
.file_lock = __SPIN_LOCK_UNLOCKED(init_task.file_lock),
};
-void daemonize_descriptors(void)
-{
- atomic_inc(&init_files.count);
- reset_files_struct(&init_files);
-}
-
/*
* allocate a file descriptor, mark it busy.
*/
@@ -685,7 +679,6 @@ void do_close_on_exec(struct files_struct *files)
struct fdtable *fdt;
/* exec unshares first */
- BUG_ON(atomic_read(&files->count) != 1);
spin_lock(&files->file_lock);
for (i = 0; ; i++) {
unsigned long set;
@@ -900,7 +893,7 @@ int replace_fd(unsigned fd, struct file *file, unsigned flags)
return __close_fd(files, fd);
if (fd >= rlimit(RLIMIT_NOFILE))
- return -EMFILE;
+ return -EBADF;
spin_lock(&files->file_lock);
err = expand_files(files, fd);
@@ -926,7 +919,7 @@ SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
return -EINVAL;
if (newfd >= rlimit(RLIMIT_NOFILE))
- return -EMFILE;
+ return -EBADF;
spin_lock(&files->file_lock);
err = expand_files(files, newfd);
@@ -995,16 +988,18 @@ int iterate_fd(struct files_struct *files, unsigned n,
const void *p)
{
struct fdtable *fdt;
- struct file *file;
int res = 0;
if (!files)
return 0;
spin_lock(&files->file_lock);
- fdt = files_fdtable(files);
- while (!res && n < fdt->max_fds) {
- file = rcu_dereference_check_fdtable(files, fdt->fd[n++]);
- if (file)
- res = f(p, file, n);
+ for (fdt = files_fdtable(files); n < fdt->max_fds; n++) {
+ struct file *file;
+ file = rcu_dereference_check_fdtable(files, fdt->fd[n]);
+ if (!file)
+ continue;
+ res = f(p, file, n);
+ if (res)
+ break;
}
spin_unlock(&files->file_lock);
return res;
diff --git a/fs/file_table.c b/fs/file_table.c
index a72bf9ddd0d2..de9e9653d611 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -458,8 +458,8 @@ void mark_files_ro(struct super_block *sb)
spin_unlock(&f->f_lock);
if (file_check_writeable(f) != 0)
continue;
+ __mnt_drop_write(f->f_path.mnt);
file_release_write(f);
- mnt_drop_write_file(f);
} while_file_list_for_each_entry;
lg_global_unlock(&files_lglock);
}
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 51ea267d444c..310972b72a66 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -228,6 +228,8 @@ static void requeue_io(struct inode *inode, struct bdi_writeback *wb)
static void inode_sync_complete(struct inode *inode)
{
inode->i_state &= ~I_SYNC;
+ /* If inode is clean an unused, put it into LRU now... */
+ inode_add_lru(inode);
/* Waiters must see I_SYNC cleared before being woken up */
smp_mb();
wake_up_bit(&inode->i_state, __I_SYNC);
@@ -1032,7 +1034,7 @@ int bdi_writeback_thread(void *data)
while (!kthread_freezable_should_stop(NULL)) {
/*
* Remove own delayed wake-up timer, since we are already awake
- * and we'll take care of the preriodic write-back.
+ * and we'll take care of the periodic write-back.
*/
del_timer(&wb->wakeup_timer);
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index 5df4775fea03..fe6ca583bbc0 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -164,27 +164,3 @@ struct fs_struct init_fs = {
.seq = SEQCNT_ZERO,
.umask = 0022,
};
-
-void daemonize_fs_struct(void)
-{
- struct fs_struct *fs = current->fs;
-
- if (fs) {
- int kill;
-
- task_lock(current);
-
- spin_lock(&init_fs.lock);
- init_fs.users++;
- spin_unlock(&init_fs.lock);
-
- spin_lock(&fs->lock);
- current->fs = &init_fs;
- kill = !--fs->users;
- spin_unlock(&fs->lock);
-
- task_unlock(current);
- if (kill)
- free_fs_struct(fs);
- }
-}
diff --git a/fs/fscache/cache.c b/fs/fscache/cache.c
index 6a3c48abd677..b52aed1dca97 100644
--- a/fs/fscache/cache.c
+++ b/fs/fscache/cache.c
@@ -314,10 +314,10 @@ EXPORT_SYMBOL(fscache_add_cache);
*/
void fscache_io_error(struct fscache_cache *cache)
{
- set_bit(FSCACHE_IOERROR, &cache->flags);
-
- printk(KERN_ERR "FS-Cache: Cache %s stopped due to I/O error\n",
- cache->ops->name);
+ if (!test_and_set_bit(FSCACHE_IOERROR, &cache->flags))
+ printk(KERN_ERR "FS-Cache:"
+ " Cache '%s' stopped due to I/O error\n",
+ cache->ops->name);
}
EXPORT_SYMBOL(fscache_io_error);
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 990535071a8a..8dcb114758e3 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -370,6 +370,66 @@ cant_attach_object:
}
/*
+ * Invalidate an object. Callable with spinlocks held.
+ */
+void __fscache_invalidate(struct fscache_cookie *cookie)
+{
+ struct fscache_object *object;
+
+ _enter("{%s}", cookie->def->name);
+
+ fscache_stat(&fscache_n_invalidates);
+
+ /* Only permit invalidation of data files. Invalidating an index will
+ * require the caller to release all its attachments to the tree rooted
+ * there, and if it's doing that, it may as well just retire the
+ * cookie.
+ */
+ ASSERTCMP(cookie->def->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE);
+
+ /* We will be updating the cookie too. */
+ BUG_ON(!cookie->def->get_aux);
+
+ /* If there's an object, we tell the object state machine to handle the
+ * invalidation on our behalf, otherwise there's nothing to do.
+ */
+ if (!hlist_empty(&cookie->backing_objects)) {
+ spin_lock(&cookie->lock);
+
+ if (!hlist_empty(&cookie->backing_objects) &&
+ !test_and_set_bit(FSCACHE_COOKIE_INVALIDATING,
+ &cookie->flags)) {
+ object = hlist_entry(cookie->backing_objects.first,
+ struct fscache_object,
+ cookie_link);
+ if (object->state < FSCACHE_OBJECT_DYING)
+ fscache_raise_event(
+ object, FSCACHE_OBJECT_EV_INVALIDATE);
+ }
+
+ spin_unlock(&cookie->lock);
+ }
+
+ _leave("");
+}
+EXPORT_SYMBOL(__fscache_invalidate);
+
+/*
+ * Wait for object invalidation to complete.
+ */
+void __fscache_wait_on_invalidate(struct fscache_cookie *cookie)
+{
+ _enter("%p", cookie);
+
+ wait_on_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING,
+ fscache_wait_bit_interruptible,
+ TASK_UNINTERRUPTIBLE);
+
+ _leave("");
+}
+EXPORT_SYMBOL(__fscache_wait_on_invalidate);
+
+/*
* update the index entries backing a cookie
*/
void __fscache_update_cookie(struct fscache_cookie *cookie)
@@ -442,16 +502,34 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire)
event = retire ? FSCACHE_OBJECT_EV_RETIRE : FSCACHE_OBJECT_EV_RELEASE;
+try_again:
spin_lock(&cookie->lock);
/* break links with all the active objects */
while (!hlist_empty(&cookie->backing_objects)) {
+ int n_reads;
object = hlist_entry(cookie->backing_objects.first,
struct fscache_object,
cookie_link);
_debug("RELEASE OBJ%x", object->debug_id);
+ set_bit(FSCACHE_COOKIE_WAITING_ON_READS, &cookie->flags);
+ n_reads = atomic_read(&object->n_reads);
+ if (n_reads) {
+ int n_ops = object->n_ops;
+ int n_in_progress = object->n_in_progress;
+ spin_unlock(&cookie->lock);
+ printk(KERN_ERR "FS-Cache:"
+ " Cookie '%s' still has %d outstanding reads (%d,%d)\n",
+ cookie->def->name,
+ n_reads, n_ops, n_in_progress);
+ wait_on_bit(&cookie->flags, FSCACHE_COOKIE_WAITING_ON_READS,
+ fscache_wait_bit, TASK_UNINTERRUPTIBLE);
+ printk("Wait finished\n");
+ goto try_again;
+ }
+
/* detach each cache object from the object cookie */
spin_lock(&object->lock);
hlist_del_init(&object->cookie_link);
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index f6aad48d38a8..ee38fef4be51 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -121,12 +121,19 @@ extern int fscache_submit_exclusive_op(struct fscache_object *,
struct fscache_operation *);
extern int fscache_submit_op(struct fscache_object *,
struct fscache_operation *);
-extern int fscache_cancel_op(struct fscache_operation *);
+extern int fscache_cancel_op(struct fscache_operation *,
+ void (*)(struct fscache_operation *));
+extern void fscache_cancel_all_ops(struct fscache_object *);
extern void fscache_abort_object(struct fscache_object *);
extern void fscache_start_operations(struct fscache_object *);
extern void fscache_operation_gc(struct work_struct *);
/*
+ * page.c
+ */
+extern void fscache_invalidate_writes(struct fscache_cookie *);
+
+/*
* proc.c
*/
#ifdef CONFIG_PROC_FS
@@ -194,6 +201,7 @@ extern atomic_t fscache_n_store_vmscan_not_storing;
extern atomic_t fscache_n_store_vmscan_gone;
extern atomic_t fscache_n_store_vmscan_busy;
extern atomic_t fscache_n_store_vmscan_cancelled;
+extern atomic_t fscache_n_store_vmscan_wait;
extern atomic_t fscache_n_marks;
extern atomic_t fscache_n_uncaches;
@@ -205,6 +213,9 @@ extern atomic_t fscache_n_acquires_ok;
extern atomic_t fscache_n_acquires_nobufs;
extern atomic_t fscache_n_acquires_oom;
+extern atomic_t fscache_n_invalidates;
+extern atomic_t fscache_n_invalidates_run;
+
extern atomic_t fscache_n_updates;
extern atomic_t fscache_n_updates_null;
extern atomic_t fscache_n_updates_run;
@@ -237,6 +248,7 @@ extern atomic_t fscache_n_cop_alloc_object;
extern atomic_t fscache_n_cop_lookup_object;
extern atomic_t fscache_n_cop_lookup_complete;
extern atomic_t fscache_n_cop_grab_object;
+extern atomic_t fscache_n_cop_invalidate_object;
extern atomic_t fscache_n_cop_update_object;
extern atomic_t fscache_n_cop_drop_object;
extern atomic_t fscache_n_cop_put_object;
@@ -278,6 +290,7 @@ extern const struct file_operations fscache_stats_fops;
static inline void fscache_raise_event(struct fscache_object *object,
unsigned event)
{
+ BUG_ON(event >= NR_FSCACHE_OBJECT_EVENTS);
if (!test_and_set_bit(event, &object->events) &&
test_bit(event, &object->event_mask))
fscache_enqueue_object(object);
diff --git a/fs/fscache/object-list.c b/fs/fscache/object-list.c
index ebe29c581380..f27c89d17885 100644
--- a/fs/fscache/object-list.c
+++ b/fs/fscache/object-list.c
@@ -245,7 +245,7 @@ static int fscache_objlist_show(struct seq_file *m, void *v)
obj->n_in_progress,
obj->n_exclusive,
atomic_read(&obj->n_reads),
- obj->event_mask & FSCACHE_OBJECT_EVENTS_MASK,
+ obj->event_mask,
obj->events,
obj->flags,
work_busy(&obj->work));
diff --git a/fs/fscache/object.c b/fs/fscache/object.c
index b6b897c550ac..50d41c180211 100644
--- a/fs/fscache/object.c
+++ b/fs/fscache/object.c
@@ -14,6 +14,7 @@
#define FSCACHE_DEBUG_LEVEL COOKIE
#include <linux/module.h>
+#include <linux/slab.h>
#include "internal.h"
const char *fscache_object_states[FSCACHE_OBJECT__NSTATES] = {
@@ -22,6 +23,7 @@ const char *fscache_object_states[FSCACHE_OBJECT__NSTATES] = {
[FSCACHE_OBJECT_CREATING] = "OBJECT_CREATING",
[FSCACHE_OBJECT_AVAILABLE] = "OBJECT_AVAILABLE",
[FSCACHE_OBJECT_ACTIVE] = "OBJECT_ACTIVE",
+ [FSCACHE_OBJECT_INVALIDATING] = "OBJECT_INVALIDATING",
[FSCACHE_OBJECT_UPDATING] = "OBJECT_UPDATING",
[FSCACHE_OBJECT_DYING] = "OBJECT_DYING",
[FSCACHE_OBJECT_LC_DYING] = "OBJECT_LC_DYING",
@@ -39,6 +41,7 @@ const char fscache_object_states_short[FSCACHE_OBJECT__NSTATES][5] = {
[FSCACHE_OBJECT_CREATING] = "CRTN",
[FSCACHE_OBJECT_AVAILABLE] = "AVBL",
[FSCACHE_OBJECT_ACTIVE] = "ACTV",
+ [FSCACHE_OBJECT_INVALIDATING] = "INVL",
[FSCACHE_OBJECT_UPDATING] = "UPDT",
[FSCACHE_OBJECT_DYING] = "DYNG",
[FSCACHE_OBJECT_LC_DYING] = "LCDY",
@@ -54,6 +57,7 @@ static void fscache_put_object(struct fscache_object *);
static void fscache_initialise_object(struct fscache_object *);
static void fscache_lookup_object(struct fscache_object *);
static void fscache_object_available(struct fscache_object *);
+static void fscache_invalidate_object(struct fscache_object *);
static void fscache_release_object(struct fscache_object *);
static void fscache_withdraw_object(struct fscache_object *);
static void fscache_enqueue_dependents(struct fscache_object *);
@@ -79,6 +83,15 @@ static inline void fscache_done_parent_op(struct fscache_object *object)
}
/*
+ * Notify netfs of invalidation completion.
+ */
+static inline void fscache_invalidation_complete(struct fscache_cookie *cookie)
+{
+ if (test_and_clear_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags))
+ wake_up_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING);
+}
+
+/*
* process events that have been sent to an object's state machine
* - initiates parent lookup
* - does object lookup
@@ -90,6 +103,7 @@ static void fscache_object_state_machine(struct fscache_object *object)
{
enum fscache_object_state new_state;
struct fscache_cookie *cookie;
+ int event;
ASSERT(object != NULL);
@@ -101,7 +115,8 @@ static void fscache_object_state_machine(struct fscache_object *object)
/* wait for the parent object to become ready */
case FSCACHE_OBJECT_INIT:
object->event_mask =
- ULONG_MAX & ~(1 << FSCACHE_OBJECT_EV_CLEARED);
+ FSCACHE_OBJECT_EVENTS_MASK &
+ ~(1 << FSCACHE_OBJECT_EV_CLEARED);
fscache_initialise_object(object);
goto done;
@@ -125,6 +140,16 @@ static void fscache_object_state_machine(struct fscache_object *object)
case FSCACHE_OBJECT_ACTIVE:
goto active_transit;
+ /* Invalidate an object on disk */
+ case FSCACHE_OBJECT_INVALIDATING:
+ clear_bit(FSCACHE_OBJECT_EV_INVALIDATE, &object->events);
+ fscache_stat(&fscache_n_invalidates_run);
+ fscache_stat(&fscache_n_cop_invalidate_object);
+ fscache_invalidate_object(object);
+ fscache_stat_d(&fscache_n_cop_invalidate_object);
+ fscache_raise_event(object, FSCACHE_OBJECT_EV_UPDATE);
+ goto active_transit;
+
/* update the object metadata on disk */
case FSCACHE_OBJECT_UPDATING:
clear_bit(FSCACHE_OBJECT_EV_UPDATE, &object->events);
@@ -251,13 +276,17 @@ static void fscache_object_state_machine(struct fscache_object *object)
/* determine the transition from a lookup state */
lookup_transit:
- switch (fls(object->events & object->event_mask) - 1) {
+ event = fls(object->events & object->event_mask) - 1;
+ switch (event) {
case FSCACHE_OBJECT_EV_WITHDRAW:
case FSCACHE_OBJECT_EV_RETIRE:
case FSCACHE_OBJECT_EV_RELEASE:
case FSCACHE_OBJECT_EV_ERROR:
new_state = FSCACHE_OBJECT_LC_DYING;
goto change_state;
+ case FSCACHE_OBJECT_EV_INVALIDATE:
+ new_state = FSCACHE_OBJECT_INVALIDATING;
+ goto change_state;
case FSCACHE_OBJECT_EV_REQUEUE:
goto done;
case -1:
@@ -268,13 +297,17 @@ lookup_transit:
/* determine the transition from an active state */
active_transit:
- switch (fls(object->events & object->event_mask) - 1) {
+ event = fls(object->events & object->event_mask) - 1;
+ switch (event) {
case FSCACHE_OBJECT_EV_WITHDRAW:
case FSCACHE_OBJECT_EV_RETIRE:
case FSCACHE_OBJECT_EV_RELEASE:
case FSCACHE_OBJECT_EV_ERROR:
new_state = FSCACHE_OBJECT_DYING;
goto change_state;
+ case FSCACHE_OBJECT_EV_INVALIDATE:
+ new_state = FSCACHE_OBJECT_INVALIDATING;
+ goto change_state;
case FSCACHE_OBJECT_EV_UPDATE:
new_state = FSCACHE_OBJECT_UPDATING;
goto change_state;
@@ -287,7 +320,8 @@ active_transit:
/* determine the transition from a terminal state */
terminal_transit:
- switch (fls(object->events & object->event_mask) - 1) {
+ event = fls(object->events & object->event_mask) - 1;
+ switch (event) {
case FSCACHE_OBJECT_EV_WITHDRAW:
new_state = FSCACHE_OBJECT_WITHDRAWING;
goto change_state;
@@ -320,8 +354,8 @@ done:
unsupported_event:
printk(KERN_ERR "FS-Cache:"
- " Unsupported event %lx [mask %lx] in state %s\n",
- object->events, object->event_mask,
+ " Unsupported event %d [%lx/%lx] in state %s\n",
+ event, object->events, object->event_mask,
fscache_object_states[object->state]);
BUG();
}
@@ -587,8 +621,6 @@ static void fscache_object_available(struct fscache_object *object)
if (object->n_in_progress == 0) {
if (object->n_ops > 0) {
ASSERTCMP(object->n_ops, >=, object->n_obj_ops);
- ASSERTIF(object->n_ops > object->n_obj_ops,
- !list_empty(&object->pending_ops));
fscache_start_operations(object);
} else {
ASSERT(list_empty(&object->pending_ops));
@@ -681,6 +713,7 @@ static void fscache_withdraw_object(struct fscache_object *object)
if (object->cookie == cookie) {
hlist_del_init(&object->cookie_link);
object->cookie = NULL;
+ fscache_invalidation_complete(cookie);
detached = true;
}
spin_unlock(&cookie->lock);
@@ -890,3 +923,55 @@ enum fscache_checkaux fscache_check_aux(struct fscache_object *object,
return result;
}
EXPORT_SYMBOL(fscache_check_aux);
+
+/*
+ * Asynchronously invalidate an object.
+ */
+static void fscache_invalidate_object(struct fscache_object *object)
+{
+ struct fscache_operation *op;
+ struct fscache_cookie *cookie = object->cookie;
+
+ _enter("{OBJ%x}", object->debug_id);
+
+ /* Reject any new read/write ops and abort any that are pending. */
+ fscache_invalidate_writes(cookie);
+ clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags);
+ fscache_cancel_all_ops(object);
+
+ /* Now we have to wait for in-progress reads and writes */
+ op = kzalloc(sizeof(*op), GFP_KERNEL);
+ if (!op) {
+ fscache_raise_event(object, FSCACHE_OBJECT_EV_ERROR);
+ _leave(" [ENOMEM]");
+ return;
+ }
+
+ fscache_operation_init(op, object->cache->ops->invalidate_object, NULL);
+ op->flags = FSCACHE_OP_ASYNC | (1 << FSCACHE_OP_EXCLUSIVE);
+
+ spin_lock(&cookie->lock);
+ if (fscache_submit_exclusive_op(object, op) < 0)
+ goto submit_op_failed;
+ spin_unlock(&cookie->lock);
+ fscache_put_operation(op);
+
+ /* Once we've completed the invalidation, we know there will be no data
+ * stored in the cache and thus we can reinstate the data-check-skip
+ * optimisation.
+ */
+ set_bit(FSCACHE_COOKIE_NO_DATA_YET, &cookie->flags);
+
+ /* We can allow read and write requests to come in once again. They'll
+ * queue up behind our exclusive invalidation operation.
+ */
+ fscache_invalidation_complete(cookie);
+ _leave("");
+ return;
+
+submit_op_failed:
+ spin_unlock(&cookie->lock);
+ kfree(op);
+ fscache_raise_event(object, FSCACHE_OBJECT_EV_ERROR);
+ _leave(" [EIO]");
+}
diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c
index 30afdfa7aec7..762a9ec4ffa4 100644
--- a/fs/fscache/operation.c
+++ b/fs/fscache/operation.c
@@ -37,6 +37,7 @@ void fscache_enqueue_operation(struct fscache_operation *op)
ASSERT(op->processor != NULL);
ASSERTCMP(op->object->state, >=, FSCACHE_OBJECT_AVAILABLE);
ASSERTCMP(atomic_read(&op->usage), >, 0);
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS);
fscache_stat(&fscache_n_op_enqueue);
switch (op->flags & FSCACHE_OP_TYPE) {
@@ -64,6 +65,9 @@ EXPORT_SYMBOL(fscache_enqueue_operation);
static void fscache_run_op(struct fscache_object *object,
struct fscache_operation *op)
{
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING);
+
+ op->state = FSCACHE_OP_ST_IN_PROGRESS;
object->n_in_progress++;
if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
@@ -84,18 +88,21 @@ int fscache_submit_exclusive_op(struct fscache_object *object,
_enter("{OBJ%x OP%x},", object->debug_id, op->debug_id);
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED);
+ ASSERTCMP(atomic_read(&op->usage), >, 0);
+
spin_lock(&object->lock);
ASSERTCMP(object->n_ops, >=, object->n_in_progress);
ASSERTCMP(object->n_ops, >=, object->n_exclusive);
ASSERT(list_empty(&op->pend_link));
- ret = -ENOBUFS;
+ op->state = FSCACHE_OP_ST_PENDING;
if (fscache_object_is_active(object)) {
op->object = object;
object->n_ops++;
object->n_exclusive++; /* reads and writes must wait */
- if (object->n_ops > 1) {
+ if (object->n_in_progress > 0) {
atomic_inc(&op->usage);
list_add_tail(&op->pend_link, &object->pending_ops);
fscache_stat(&fscache_n_op_pend);
@@ -121,8 +128,11 @@ int fscache_submit_exclusive_op(struct fscache_object *object,
fscache_stat(&fscache_n_op_pend);
ret = 0;
} else {
- /* not allowed to submit ops in any other state */
- BUG();
+ /* If we're in any other state, there must have been an I/O
+ * error of some nature.
+ */
+ ASSERT(test_bit(FSCACHE_IOERROR, &object->cache->flags));
+ ret = -EIO;
}
spin_unlock(&object->lock);
@@ -186,6 +196,7 @@ int fscache_submit_op(struct fscache_object *object,
_enter("{OBJ%x OP%x},{%u}",
object->debug_id, op->debug_id, atomic_read(&op->usage));
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED);
ASSERTCMP(atomic_read(&op->usage), >, 0);
spin_lock(&object->lock);
@@ -196,6 +207,7 @@ int fscache_submit_op(struct fscache_object *object,
ostate = object->state;
smp_rmb();
+ op->state = FSCACHE_OP_ST_PENDING;
if (fscache_object_is_active(object)) {
op->object = object;
object->n_ops++;
@@ -225,12 +237,15 @@ int fscache_submit_op(struct fscache_object *object,
object->state == FSCACHE_OBJECT_LC_DYING ||
object->state == FSCACHE_OBJECT_WITHDRAWING) {
fscache_stat(&fscache_n_op_rejected);
+ op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else if (!test_bit(FSCACHE_IOERROR, &object->cache->flags)) {
fscache_report_unexpected_submission(object, op, ostate);
ASSERT(!fscache_object_is_active(object));
+ op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
} else {
+ op->state = FSCACHE_OP_ST_CANCELLED;
ret = -ENOBUFS;
}
@@ -283,20 +298,28 @@ void fscache_start_operations(struct fscache_object *object)
/*
* cancel an operation that's pending on an object
*/
-int fscache_cancel_op(struct fscache_operation *op)
+int fscache_cancel_op(struct fscache_operation *op,
+ void (*do_cancel)(struct fscache_operation *))
{
struct fscache_object *object = op->object;
int ret;
_enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id);
+ ASSERTCMP(op->state, >=, FSCACHE_OP_ST_PENDING);
+ ASSERTCMP(op->state, !=, FSCACHE_OP_ST_CANCELLED);
+ ASSERTCMP(atomic_read(&op->usage), >, 0);
+
spin_lock(&object->lock);
ret = -EBUSY;
- if (!list_empty(&op->pend_link)) {
+ if (op->state == FSCACHE_OP_ST_PENDING) {
+ ASSERT(!list_empty(&op->pend_link));
fscache_stat(&fscache_n_op_cancelled);
list_del_init(&op->pend_link);
- object->n_ops--;
+ if (do_cancel)
+ do_cancel(op);
+ op->state = FSCACHE_OP_ST_CANCELLED;
if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
object->n_exclusive--;
if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
@@ -311,6 +334,70 @@ int fscache_cancel_op(struct fscache_operation *op)
}
/*
+ * Cancel all pending operations on an object
+ */
+void fscache_cancel_all_ops(struct fscache_object *object)
+{
+ struct fscache_operation *op;
+
+ _enter("OBJ%x", object->debug_id);
+
+ spin_lock(&object->lock);
+
+ while (!list_empty(&object->pending_ops)) {
+ op = list_entry(object->pending_ops.next,
+ struct fscache_operation, pend_link);
+ fscache_stat(&fscache_n_op_cancelled);
+ list_del_init(&op->pend_link);
+
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING);
+ op->state = FSCACHE_OP_ST_CANCELLED;
+
+ if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
+ object->n_exclusive--;
+ if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags))
+ wake_up_bit(&op->flags, FSCACHE_OP_WAITING);
+ fscache_put_operation(op);
+ cond_resched_lock(&object->lock);
+ }
+
+ spin_unlock(&object->lock);
+ _leave("");
+}
+
+/*
+ * Record the completion or cancellation of an in-progress operation.
+ */
+void fscache_op_complete(struct fscache_operation *op, bool cancelled)
+{
+ struct fscache_object *object = op->object;
+
+ _enter("OBJ%x", object->debug_id);
+
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS);
+ ASSERTCMP(object->n_in_progress, >, 0);
+ ASSERTIFCMP(test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags),
+ object->n_exclusive, >, 0);
+ ASSERTIFCMP(test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags),
+ object->n_in_progress, ==, 1);
+
+ spin_lock(&object->lock);
+
+ op->state = cancelled ?
+ FSCACHE_OP_ST_CANCELLED : FSCACHE_OP_ST_COMPLETE;
+
+ if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags))
+ object->n_exclusive--;
+ object->n_in_progress--;
+ if (object->n_in_progress == 0)
+ fscache_start_operations(object);
+
+ spin_unlock(&object->lock);
+ _leave("");
+}
+EXPORT_SYMBOL(fscache_op_complete);
+
+/*
* release an operation
* - queues pending ops if this is the last in-progress op
*/
@@ -328,8 +415,9 @@ void fscache_put_operation(struct fscache_operation *op)
return;
_debug("PUT OP");
- if (test_and_set_bit(FSCACHE_OP_DEAD, &op->flags))
- BUG();
+ ASSERTIFCMP(op->state != FSCACHE_OP_ST_COMPLETE,
+ op->state, ==, FSCACHE_OP_ST_CANCELLED);
+ op->state = FSCACHE_OP_ST_DEAD;
fscache_stat(&fscache_n_op_release);
@@ -340,8 +428,14 @@ void fscache_put_operation(struct fscache_operation *op)
object = op->object;
- if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags))
- atomic_dec(&object->n_reads);
+ if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) {
+ if (atomic_dec_and_test(&object->n_reads)) {
+ clear_bit(FSCACHE_COOKIE_WAITING_ON_READS,
+ &object->cookie->flags);
+ wake_up_bit(&object->cookie->flags,
+ FSCACHE_COOKIE_WAITING_ON_READS);
+ }
+ }
/* now... we may get called with the object spinlock held, so we
* complete the cleanup here only if we can immediately acquire the
@@ -359,16 +453,6 @@ void fscache_put_operation(struct fscache_operation *op)
return;
}
- if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) {
- ASSERTCMP(object->n_exclusive, >, 0);
- object->n_exclusive--;
- }
-
- ASSERTCMP(object->n_in_progress, >, 0);
- object->n_in_progress--;
- if (object->n_in_progress == 0)
- fscache_start_operations(object);
-
ASSERTCMP(object->n_ops, >, 0);
object->n_ops--;
if (object->n_ops == 0)
@@ -407,23 +491,14 @@ void fscache_operation_gc(struct work_struct *work)
spin_unlock(&cache->op_gc_list_lock);
object = op->object;
+ spin_lock(&object->lock);
_debug("GC DEFERRED REL OBJ%x OP%x",
object->debug_id, op->debug_id);
fscache_stat(&fscache_n_op_gc);
ASSERTCMP(atomic_read(&op->usage), ==, 0);
-
- spin_lock(&object->lock);
- if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) {
- ASSERTCMP(object->n_exclusive, >, 0);
- object->n_exclusive--;
- }
-
- ASSERTCMP(object->n_in_progress, >, 0);
- object->n_in_progress--;
- if (object->n_in_progress == 0)
- fscache_start_operations(object);
+ ASSERTCMP(op->state, ==, FSCACHE_OP_ST_DEAD);
ASSERTCMP(object->n_ops, >, 0);
object->n_ops--;
@@ -431,6 +506,7 @@ void fscache_operation_gc(struct work_struct *work)
fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED);
spin_unlock(&object->lock);
+ kfree(op);
} while (count++ < 20);
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index 3f7a59bfa7ad..ff000e52072d 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -56,6 +56,7 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie,
_enter("%p,%p,%x", cookie, page, gfp);
+try_again:
rcu_read_lock();
val = radix_tree_lookup(&cookie->stores, page->index);
if (!val) {
@@ -104,11 +105,19 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie,
return true;
page_busy:
- /* we might want to wait here, but that could deadlock the allocator as
- * the work threads writing to the cache may all end up sleeping
- * on memory allocation */
- fscache_stat(&fscache_n_store_vmscan_busy);
- return false;
+ /* We will wait here if we're allowed to, but that could deadlock the
+ * allocator as the work threads writing to the cache may all end up
+ * sleeping on memory allocation, so we may need to impose a timeout
+ * too. */
+ if (!(gfp & __GFP_WAIT)) {
+ fscache_stat(&fscache_n_store_vmscan_busy);
+ return false;
+ }
+
+ fscache_stat(&fscache_n_store_vmscan_wait);
+ __fscache_wait_on_page_write(cookie, page);
+ gfp &= ~__GFP_WAIT;
+ goto try_again;
}
EXPORT_SYMBOL(__fscache_maybe_release_page);
@@ -162,6 +171,7 @@ static void fscache_attr_changed_op(struct fscache_operation *op)
fscache_abort_object(object);
}
+ fscache_op_complete(op, true);
_leave("");
}
@@ -223,6 +233,8 @@ static void fscache_release_retrieval_op(struct fscache_operation *_op)
_enter("{OP%x}", op->op.debug_id);
+ ASSERTCMP(op->n_pages, ==, 0);
+
fscache_hist(fscache_retrieval_histogram, op->start_time);
if (op->context)
fscache_put_context(op->op.object->cookie, op->context);
@@ -291,6 +303,17 @@ static int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie)
}
/*
+ * Handle cancellation of a pending retrieval op
+ */
+static void fscache_do_cancel_retrieval(struct fscache_operation *_op)
+{
+ struct fscache_retrieval *op =
+ container_of(_op, struct fscache_retrieval, op);
+
+ op->n_pages = 0;
+}
+
+/*
* wait for an object to become active (or dead)
*/
static int fscache_wait_for_retrieval_activation(struct fscache_object *object,
@@ -307,8 +330,8 @@ static int fscache_wait_for_retrieval_activation(struct fscache_object *object,
fscache_stat(stat_op_waits);
if (wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING,
fscache_wait_bit_interruptible,
- TASK_INTERRUPTIBLE) < 0) {
- ret = fscache_cancel_op(&op->op);
+ TASK_INTERRUPTIBLE) != 0) {
+ ret = fscache_cancel_op(&op->op, fscache_do_cancel_retrieval);
if (ret == 0)
return -ERESTARTSYS;
@@ -320,7 +343,14 @@ static int fscache_wait_for_retrieval_activation(struct fscache_object *object,
_debug("<<< GO");
check_if_dead:
+ if (op->op.state == FSCACHE_OP_ST_CANCELLED) {
+ fscache_stat(stat_object_dead);
+ _leave(" = -ENOBUFS [cancelled]");
+ return -ENOBUFS;
+ }
if (unlikely(fscache_object_is_dead(object))) {
+ pr_err("%s() = -ENOBUFS [obj dead %d]\n", __func__, op->op.state);
+ fscache_cancel_op(&op->op, fscache_do_cancel_retrieval);
fscache_stat(stat_object_dead);
return -ENOBUFS;
}
@@ -353,6 +383,11 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie,
if (hlist_empty(&cookie->backing_objects))
goto nobufs;
+ if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) {
+ _leave(" = -ENOBUFS [invalidating]");
+ return -ENOBUFS;
+ }
+
ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX);
ASSERTCMP(page, !=, NULL);
@@ -364,6 +399,7 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie,
_leave(" = -ENOMEM");
return -ENOMEM;
}
+ op->n_pages = 1;
spin_lock(&cookie->lock);
@@ -375,10 +411,10 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie,
ASSERTCMP(object->state, >, FSCACHE_OBJECT_LOOKING_UP);
atomic_inc(&object->n_reads);
- set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
+ __set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
if (fscache_submit_op(object, &op->op) < 0)
- goto nobufs_unlock;
+ goto nobufs_unlock_dec;
spin_unlock(&cookie->lock);
fscache_stat(&fscache_n_retrieval_ops);
@@ -425,6 +461,8 @@ error:
_leave(" = %d", ret);
return ret;
+nobufs_unlock_dec:
+ atomic_dec(&object->n_reads);
nobufs_unlock:
spin_unlock(&cookie->lock);
kfree(op);
@@ -472,6 +510,11 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie,
if (hlist_empty(&cookie->backing_objects))
goto nobufs;
+ if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) {
+ _leave(" = -ENOBUFS [invalidating]");
+ return -ENOBUFS;
+ }
+
ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX);
ASSERTCMP(*nr_pages, >, 0);
ASSERT(!list_empty(pages));
@@ -482,6 +525,7 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie,
op = fscache_alloc_retrieval(mapping, end_io_func, context);
if (!op)
return -ENOMEM;
+ op->n_pages = *nr_pages;
spin_lock(&cookie->lock);
@@ -491,10 +535,10 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie,
struct fscache_object, cookie_link);
atomic_inc(&object->n_reads);
- set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
+ __set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
if (fscache_submit_op(object, &op->op) < 0)
- goto nobufs_unlock;
+ goto nobufs_unlock_dec;
spin_unlock(&cookie->lock);
fscache_stat(&fscache_n_retrieval_ops);
@@ -541,6 +585,8 @@ error:
_leave(" = %d", ret);
return ret;
+nobufs_unlock_dec:
+ atomic_dec(&object->n_reads);
nobufs_unlock:
spin_unlock(&cookie->lock);
kfree(op);
@@ -577,12 +623,18 @@ int __fscache_alloc_page(struct fscache_cookie *cookie,
ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX);
ASSERTCMP(page, !=, NULL);
+ if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) {
+ _leave(" = -ENOBUFS [invalidating]");
+ return -ENOBUFS;
+ }
+
if (fscache_wait_for_deferred_lookup(cookie) < 0)
return -ERESTARTSYS;
op = fscache_alloc_retrieval(page->mapping, NULL, NULL);
if (!op)
return -ENOMEM;
+ op->n_pages = 1;
spin_lock(&cookie->lock);
@@ -658,9 +710,27 @@ static void fscache_write_op(struct fscache_operation *_op)
spin_lock(&object->lock);
cookie = object->cookie;
- if (!fscache_object_is_active(object) || !cookie) {
+ if (!fscache_object_is_active(object)) {
+ /* If we get here, then the on-disk cache object likely longer
+ * exists, so we should just cancel this write operation.
+ */
+ spin_unlock(&object->lock);
+ fscache_op_complete(&op->op, false);
+ _leave(" [inactive]");
+ return;
+ }
+
+ if (!cookie) {
+ /* If we get here, then the cookie belonging to the object was
+ * detached, probably by the cookie being withdrawn due to
+ * memory pressure, which means that the pages we might write
+ * to the cache from no longer exist - therefore, we can just
+ * cancel this write operation.
+ */
spin_unlock(&object->lock);
- _leave("");
+ fscache_op_complete(&op->op, false);
+ _leave(" [cancel] op{f=%lx s=%u} obj{s=%u f=%lx}",
+ _op->flags, _op->state, object->state, object->flags);
return;
}
@@ -696,6 +766,7 @@ static void fscache_write_op(struct fscache_operation *_op)
fscache_end_page_write(object, page);
if (ret < 0) {
fscache_abort_object(object);
+ fscache_op_complete(&op->op, true);
} else {
fscache_enqueue_operation(&op->op);
}
@@ -710,6 +781,38 @@ superseded:
spin_unlock(&cookie->stores_lock);
clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags);
spin_unlock(&object->lock);
+ fscache_op_complete(&op->op, true);
+ _leave("");
+}
+
+/*
+ * Clear the pages pending writing for invalidation
+ */
+void fscache_invalidate_writes(struct fscache_cookie *cookie)
+{
+ struct page *page;
+ void *results[16];
+ int n, i;
+
+ _enter("");
+
+ while (spin_lock(&cookie->stores_lock),
+ n = radix_tree_gang_lookup_tag(&cookie->stores, results, 0,
+ ARRAY_SIZE(results),
+ FSCACHE_COOKIE_PENDING_TAG),
+ n > 0) {
+ for (i = n - 1; i >= 0; i--) {
+ page = results[i];
+ radix_tree_delete(&cookie->stores, page->index);
+ }
+
+ spin_unlock(&cookie->stores_lock);
+
+ for (i = n - 1; i >= 0; i--)
+ page_cache_release(results[i]);
+ }
+
+ spin_unlock(&cookie->stores_lock);
_leave("");
}
@@ -759,7 +862,12 @@ int __fscache_write_page(struct fscache_cookie *cookie,
fscache_stat(&fscache_n_stores);
- op = kzalloc(sizeof(*op), GFP_NOIO);
+ if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) {
+ _leave(" = -ENOBUFS [invalidating]");
+ return -ENOBUFS;
+ }
+
+ op = kzalloc(sizeof(*op), GFP_NOIO | __GFP_NOMEMALLOC | __GFP_NORETRY);
if (!op)
goto nomem;
@@ -915,6 +1023,40 @@ done:
EXPORT_SYMBOL(__fscache_uncache_page);
/**
+ * fscache_mark_page_cached - Mark a page as being cached
+ * @op: The retrieval op pages are being marked for
+ * @page: The page to be marked
+ *
+ * Mark a netfs page as being cached. After this is called, the netfs
+ * must call fscache_uncache_page() to remove the mark.
+ */
+void fscache_mark_page_cached(struct fscache_retrieval *op, struct page *page)
+{
+ struct fscache_cookie *cookie = op->op.object->cookie;
+
+#ifdef CONFIG_FSCACHE_STATS
+ atomic_inc(&fscache_n_marks);
+#endif
+
+ _debug("- mark %p{%lx}", page, page->index);
+ if (TestSetPageFsCache(page)) {
+ static bool once_only;
+ if (!once_only) {
+ once_only = true;
+ printk(KERN_WARNING "FS-Cache:"
+ " Cookie type %s marked page %lx"
+ " multiple times\n",
+ cookie->def->name, page->index);
+ }
+ }
+
+ if (cookie->def->mark_page_cached)
+ cookie->def->mark_page_cached(cookie->netfs_data,
+ op->mapping, page);
+}
+EXPORT_SYMBOL(fscache_mark_page_cached);
+
+/**
* fscache_mark_pages_cached - Mark pages as being cached
* @op: The retrieval op pages are being marked for
* @pagevec: The pages to be marked
@@ -925,32 +1067,11 @@ EXPORT_SYMBOL(__fscache_uncache_page);
void fscache_mark_pages_cached(struct fscache_retrieval *op,
struct pagevec *pagevec)
{
- struct fscache_cookie *cookie = op->op.object->cookie;
unsigned long loop;
-#ifdef CONFIG_FSCACHE_STATS
- atomic_add(pagevec->nr, &fscache_n_marks);
-#endif
-
- for (loop = 0; loop < pagevec->nr; loop++) {
- struct page *page = pagevec->pages[loop];
-
- _debug("- mark %p{%lx}", page, page->index);
- if (TestSetPageFsCache(page)) {
- static bool once_only;
- if (!once_only) {
- once_only = true;
- printk(KERN_WARNING "FS-Cache:"
- " Cookie type %s marked page %lx"
- " multiple times\n",
- cookie->def->name, page->index);
- }
- }
- }
+ for (loop = 0; loop < pagevec->nr; loop++)
+ fscache_mark_page_cached(op, pagevec->pages[loop]);
- if (cookie->def->mark_pages_cached)
- cookie->def->mark_pages_cached(cookie->netfs_data,
- op->mapping, pagevec);
pagevec_reinit(pagevec);
}
EXPORT_SYMBOL(fscache_mark_pages_cached);
diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c
index 4765190d537f..8179e8bc4a3d 100644
--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -69,6 +69,7 @@ atomic_t fscache_n_store_vmscan_not_storing;
atomic_t fscache_n_store_vmscan_gone;
atomic_t fscache_n_store_vmscan_busy;
atomic_t fscache_n_store_vmscan_cancelled;
+atomic_t fscache_n_store_vmscan_wait;
atomic_t fscache_n_marks;
atomic_t fscache_n_uncaches;
@@ -80,6 +81,9 @@ atomic_t fscache_n_acquires_ok;
atomic_t fscache_n_acquires_nobufs;
atomic_t fscache_n_acquires_oom;
+atomic_t fscache_n_invalidates;
+atomic_t fscache_n_invalidates_run;
+
atomic_t fscache_n_updates;
atomic_t fscache_n_updates_null;
atomic_t fscache_n_updates_run;
@@ -112,6 +116,7 @@ atomic_t fscache_n_cop_alloc_object;
atomic_t fscache_n_cop_lookup_object;
atomic_t fscache_n_cop_lookup_complete;
atomic_t fscache_n_cop_grab_object;
+atomic_t fscache_n_cop_invalidate_object;
atomic_t fscache_n_cop_update_object;
atomic_t fscache_n_cop_drop_object;
atomic_t fscache_n_cop_put_object;
@@ -168,6 +173,10 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_object_created),
atomic_read(&fscache_n_object_lookups_timed_out));
+ seq_printf(m, "Invals : n=%u run=%u\n",
+ atomic_read(&fscache_n_invalidates),
+ atomic_read(&fscache_n_invalidates_run));
+
seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
atomic_read(&fscache_n_updates),
atomic_read(&fscache_n_updates_null),
@@ -224,11 +233,12 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_store_radix_deletes),
atomic_read(&fscache_n_store_pages_over_limit));
- seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u\n",
+ seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n",
atomic_read(&fscache_n_store_vmscan_not_storing),
atomic_read(&fscache_n_store_vmscan_gone),
atomic_read(&fscache_n_store_vmscan_busy),
- atomic_read(&fscache_n_store_vmscan_cancelled));
+ atomic_read(&fscache_n_store_vmscan_cancelled),
+ atomic_read(&fscache_n_store_vmscan_wait));
seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
atomic_read(&fscache_n_op_pend),
@@ -246,7 +256,8 @@ static int fscache_stats_show(struct seq_file *m, void *v)
atomic_read(&fscache_n_cop_lookup_object),
atomic_read(&fscache_n_cop_lookup_complete),
atomic_read(&fscache_n_cop_grab_object));
- seq_printf(m, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n",
+ seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n",
+ atomic_read(&fscache_n_cop_invalidate_object),
atomic_read(&fscache_n_cop_update_object),
atomic_read(&fscache_n_cop_drop_object),
atomic_read(&fscache_n_cop_put_object),
diff --git a/fs/fuse/Kconfig b/fs/fuse/Kconfig
index 0cf160a94eda..1b2f6c2c3aaf 100644
--- a/fs/fuse/Kconfig
+++ b/fs/fuse/Kconfig
@@ -4,12 +4,24 @@ config FUSE_FS
With FUSE it is possible to implement a fully functional filesystem
in a userspace program.
- There's also companion library: libfuse. This library along with
- utilities is available from the FUSE homepage:
+ There's also a companion library: libfuse2. This library is available
+ from the FUSE homepage:
<http://fuse.sourceforge.net/>
+ although chances are your distribution already has that library
+ installed if you've installed the "fuse" package itself.
See <file:Documentation/filesystems/fuse.txt> for more information.
See <file:Documentation/Changes> for needed library/utility version.
If you want to develop a userspace FS, or if you want to use
a filesystem based on FUSE, answer Y or M.
+
+config CUSE
+ tristate "Character device in Userspace support"
+ depends on FUSE_FS
+ help
+ This FUSE extension allows character devices to be
+ implemented in userspace.
+
+ If you want to develop or use a userspace character device
+ based on CUSE, answer Y or M.
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index ee8d55042298..e397b675b029 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -45,7 +45,6 @@
#include <linux/miscdevice.h>
#include <linux/mutex.h>
#include <linux/slab.h>
-#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/module.h>
@@ -63,7 +62,7 @@ struct cuse_conn {
bool unrestricted_ioctl;
};
-static DEFINE_SPINLOCK(cuse_lock); /* protects cuse_conntbl */
+static DEFINE_MUTEX(cuse_lock); /* protects registration */
static struct list_head cuse_conntbl[CUSE_CONNTBL_LEN];
static struct class *cuse_class;
@@ -114,14 +113,14 @@ static int cuse_open(struct inode *inode, struct file *file)
int rc;
/* look up and get the connection */
- spin_lock(&cuse_lock);
+ mutex_lock(&cuse_lock);
list_for_each_entry(pos, cuse_conntbl_head(devt), list)
if (pos->dev->devt == devt) {
fuse_conn_get(&pos->fc);
cc = pos;
break;
}
- spin_unlock(&cuse_lock);
+ mutex_unlock(&cuse_lock);
/* dead? */
if (!cc)
@@ -267,7 +266,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo)
{
char *end = p + len;
- char *key, *val;
+ char *uninitialized_var(key), *uninitialized_var(val);
int rc;
while (true) {
@@ -305,14 +304,14 @@ static void cuse_gendev_release(struct device *dev)
*/
static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
{
- struct cuse_conn *cc = fc_to_cc(fc);
+ struct cuse_conn *cc = fc_to_cc(fc), *pos;
struct cuse_init_out *arg = req->out.args[0].value;
struct page *page = req->pages[0];
struct cuse_devinfo devinfo = { };
struct device *dev;
struct cdev *cdev;
dev_t devt;
- int rc;
+ int rc, i;
if (req->out.h.error ||
arg->major != FUSE_KERNEL_VERSION || arg->minor < 11) {
@@ -356,15 +355,24 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
dev_set_drvdata(dev, cc);
dev_set_name(dev, "%s", devinfo.name);
+ mutex_lock(&cuse_lock);
+
+ /* make sure the device-name is unique */
+ for (i = 0; i < CUSE_CONNTBL_LEN; ++i) {
+ list_for_each_entry(pos, &cuse_conntbl[i], list)
+ if (!strcmp(dev_name(pos->dev), dev_name(dev)))
+ goto err_unlock;
+ }
+
rc = device_add(dev);
if (rc)
- goto err_device;
+ goto err_unlock;
/* register cdev */
rc = -ENOMEM;
cdev = cdev_alloc();
if (!cdev)
- goto err_device;
+ goto err_unlock;
cdev->owner = THIS_MODULE;
cdev->ops = &cuse_frontend_fops;
@@ -377,9 +385,8 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
cc->cdev = cdev;
/* make the device available */
- spin_lock(&cuse_lock);
list_add(&cc->list, cuse_conntbl_head(devt));
- spin_unlock(&cuse_lock);
+ mutex_unlock(&cuse_lock);
/* announce device availability */
dev_set_uevent_suppress(dev, 0);
@@ -391,7 +398,8 @@ out:
err_cdev:
cdev_del(cdev);
-err_device:
+err_unlock:
+ mutex_unlock(&cuse_lock);
put_device(dev);
err_region:
unregister_chrdev_region(devt, 1);
@@ -520,9 +528,9 @@ static int cuse_channel_release(struct inode *inode, struct file *file)
int rc;
/* remove from the conntbl, no more access from this point on */
- spin_lock(&cuse_lock);
+ mutex_lock(&cuse_lock);
list_del_init(&cc->list);
- spin_unlock(&cuse_lock);
+ mutex_unlock(&cuse_lock);
/* remove device */
if (cc->dev)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 8c23fa7a91e6..e83351aa5bad 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -92,8 +92,8 @@ static void __fuse_put_request(struct fuse_req *req)
static void fuse_req_init_context(struct fuse_req *req)
{
- req->in.h.uid = current_fsuid();
- req->in.h.gid = current_fsgid();
+ req->in.h.uid = from_kuid_munged(&init_user_ns, current_fsuid());
+ req->in.h.gid = from_kgid_munged(&init_user_ns, current_fsgid());
req->in.h.pid = current->pid;
}
@@ -692,8 +692,6 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep)
struct page *oldpage = *pagep;
struct page *newpage;
struct pipe_buffer *buf = cs->pipebufs;
- struct address_space *mapping;
- pgoff_t index;
unlock_request(cs->fc, cs->req);
fuse_copy_finish(cs);
@@ -724,9 +722,6 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep)
if (fuse_check_page(newpage) != 0)
goto out_fallback_unlock;
- mapping = oldpage->mapping;
- index = oldpage->index;
-
/*
* This is a new and locked page, it shouldn't be mapped or
* have any special flags on it
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 324bc0850534..b7c09f9eb40c 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -818,8 +818,8 @@ static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
stat->ino = attr->ino;
stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
stat->nlink = attr->nlink;
- stat->uid = attr->uid;
- stat->gid = attr->gid;
+ stat->uid = make_kuid(&init_user_ns, attr->uid);
+ stat->gid = make_kgid(&init_user_ns, attr->gid);
stat->rdev = inode->i_rdev;
stat->atime.tv_sec = attr->atime;
stat->atime.tv_nsec = attr->atimensec;
@@ -1007,12 +1007,12 @@ int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
rcu_read_lock();
ret = 0;
cred = __task_cred(task);
- if (cred->euid == fc->user_id &&
- cred->suid == fc->user_id &&
- cred->uid == fc->user_id &&
- cred->egid == fc->group_id &&
- cred->sgid == fc->group_id &&
- cred->gid == fc->group_id)
+ if (uid_eq(cred->euid, fc->user_id) &&
+ uid_eq(cred->suid, fc->user_id) &&
+ uid_eq(cred->uid, fc->user_id) &&
+ gid_eq(cred->egid, fc->group_id) &&
+ gid_eq(cred->sgid, fc->group_id) &&
+ gid_eq(cred->gid, fc->group_id))
ret = 1;
rcu_read_unlock();
@@ -1306,9 +1306,9 @@ static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
if (ivalid & ATTR_MODE)
arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
if (ivalid & ATTR_UID)
- arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid;
+ arg->valid |= FATTR_UID, arg->uid = from_kuid(&init_user_ns, iattr->ia_uid);
if (ivalid & ATTR_GID)
- arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid;
+ arg->valid |= FATTR_GID, arg->gid = from_kgid(&init_user_ns, iattr->ia_gid);
if (ivalid & ATTR_SIZE)
arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
if (ivalid & ATTR_ATIME) {
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 78d2837bc940..f3ab824fa302 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1599,19 +1599,19 @@ static sector_t fuse_bmap(struct address_space *mapping, sector_t block)
return err ? 0 : outarg.block;
}
-static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin)
+static loff_t fuse_file_llseek(struct file *file, loff_t offset, int whence)
{
loff_t retval;
struct inode *inode = file->f_path.dentry->d_inode;
/* No i_mutex protection necessary for SEEK_CUR and SEEK_SET */
- if (origin == SEEK_CUR || origin == SEEK_SET)
- return generic_file_llseek(file, offset, origin);
+ if (whence == SEEK_CUR || whence == SEEK_SET)
+ return generic_file_llseek(file, offset, whence);
mutex_lock(&inode->i_mutex);
retval = fuse_update_attributes(inode, NULL, file, NULL);
if (!retval)
- retval = generic_file_llseek(file, offset, origin);
+ retval = generic_file_llseek(file, offset, whence);
mutex_unlock(&inode->i_mutex);
return retval;
@@ -2177,8 +2177,8 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
return ret;
}
-long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
- loff_t length)
+static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
+ loff_t length)
{
struct fuse_file *ff = file->private_data;
struct fuse_conn *fc = ff->fc;
@@ -2213,7 +2213,6 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
return err;
}
-EXPORT_SYMBOL_GPL(fuse_file_fallocate);
static const struct file_operations fuse_file_operations = {
.llseek = fuse_file_llseek,
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index e24dd74e3068..e105a53fc72d 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -333,10 +333,10 @@ struct fuse_conn {
atomic_t count;
/** The user id for this mount */
- uid_t user_id;
+ kuid_t user_id;
/** The group id for this mount */
- gid_t group_id;
+ kgid_t group_id;
/** The fuse mount flags for this mount */
unsigned flags;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index f0eda124cffb..73ca6b72beaf 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -60,8 +60,8 @@ MODULE_PARM_DESC(max_user_congthresh,
struct fuse_mount_data {
int fd;
unsigned rootmode;
- unsigned user_id;
- unsigned group_id;
+ kuid_t user_id;
+ kgid_t group_id;
unsigned fd_present:1;
unsigned rootmode_present:1;
unsigned user_id_present:1;
@@ -164,8 +164,8 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
inode->i_ino = fuse_squash_ino(attr->ino);
inode->i_mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
set_nlink(inode, attr->nlink);
- inode->i_uid = attr->uid;
- inode->i_gid = attr->gid;
+ inode->i_uid = make_kuid(&init_user_ns, attr->uid);
+ inode->i_gid = make_kgid(&init_user_ns, attr->gid);
inode->i_blocks = attr->blocks;
inode->i_atime.tv_sec = attr->atime;
inode->i_atime.tv_nsec = attr->atimensec;
@@ -492,14 +492,18 @@ static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
case OPT_USER_ID:
if (match_int(&args[0], &value))
return 0;
- d->user_id = value;
+ d->user_id = make_kuid(current_user_ns(), value);
+ if (!uid_valid(d->user_id))
+ return 0;
d->user_id_present = 1;
break;
case OPT_GROUP_ID:
if (match_int(&args[0], &value))
return 0;
- d->group_id = value;
+ d->group_id = make_kgid(current_user_ns(), value);
+ if (!gid_valid(d->group_id))
+ return 0;
d->group_id_present = 1;
break;
@@ -540,8 +544,8 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root)
struct super_block *sb = root->d_sb;
struct fuse_conn *fc = get_fuse_conn_super(sb);
- seq_printf(m, ",user_id=%u", fc->user_id);
- seq_printf(m, ",group_id=%u", fc->group_id);
+ seq_printf(m, ",user_id=%u", from_kuid_munged(&init_user_ns, fc->user_id));
+ seq_printf(m, ",group_id=%u", from_kgid_munged(&init_user_ns, fc->group_id));
if (fc->flags & FUSE_DEFAULT_PERMISSIONS)
seq_puts(m, ",default_permissions");
if (fc->flags & FUSE_ALLOW_OTHER)
@@ -989,7 +993,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
if (!file)
goto err;
- if (file->f_op != &fuse_dev_operations)
+ if ((file->f_op != &fuse_dev_operations) ||
+ (file->f_cred->user_ns != &init_user_ns))
goto err_fput;
fc = kmalloc(sizeof(*fc), GFP_KERNEL);
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 01c4975da4bc..30de4f2a2ea9 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -643,7 +643,7 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping,
goto out_unlock;
requested = data_blocks + ind_blocks;
- error = gfs2_inplace_reserve(ip, requested);
+ error = gfs2_inplace_reserve(ip, requested, 0);
if (error)
goto out_qunlock;
}
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 1fd3ae237bdd..a68e91bcef3d 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -991,6 +991,41 @@ unlock:
return err;
}
+/**
+ * gfs2_journaled_truncate - Wrapper for truncate_pagecache for jdata files
+ * @inode: The inode being truncated
+ * @oldsize: The original (larger) size
+ * @newsize: The new smaller size
+ *
+ * With jdata files, we have to journal a revoke for each block which is
+ * truncated. As a result, we need to split this into separate transactions
+ * if the number of pages being truncated gets too large.
+ */
+
+#define GFS2_JTRUNC_REVOKES 8192
+
+static int gfs2_journaled_truncate(struct inode *inode, u64 oldsize, u64 newsize)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ u64 max_chunk = GFS2_JTRUNC_REVOKES * sdp->sd_vfs->s_blocksize;
+ u64 chunk;
+ int error;
+
+ while (oldsize != newsize) {
+ chunk = oldsize - newsize;
+ if (chunk > max_chunk)
+ chunk = max_chunk;
+ truncate_pagecache(inode, oldsize, oldsize - chunk);
+ oldsize -= chunk;
+ gfs2_trans_end(sdp);
+ error = gfs2_trans_begin(sdp, RES_DINODE, GFS2_JTRUNC_REVOKES);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
static int trunc_start(struct inode *inode, u64 oldsize, u64 newsize)
{
struct gfs2_inode *ip = GFS2_I(inode);
@@ -1000,8 +1035,10 @@ static int trunc_start(struct inode *inode, u64 oldsize, u64 newsize)
int journaled = gfs2_is_jdata(ip);
int error;
- error = gfs2_trans_begin(sdp,
- RES_DINODE + (journaled ? RES_JDATA : 0), 0);
+ if (journaled)
+ error = gfs2_trans_begin(sdp, RES_DINODE + RES_JDATA, GFS2_JTRUNC_REVOKES);
+ else
+ error = gfs2_trans_begin(sdp, RES_DINODE, 0);
if (error)
return error;
@@ -1026,7 +1063,16 @@ static int trunc_start(struct inode *inode, u64 oldsize, u64 newsize)
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_dinode_out(ip, dibh->b_data);
- truncate_pagecache(inode, oldsize, newsize);
+ if (journaled)
+ error = gfs2_journaled_truncate(inode, oldsize, newsize);
+ else
+ truncate_pagecache(inode, oldsize, newsize);
+
+ if (error) {
+ brelse(dibh);
+ return error;
+ }
+
out_brelse:
brelse(dibh);
out:
@@ -1178,7 +1224,7 @@ static int do_grow(struct inode *inode, u64 size)
if (error)
return error;
- error = gfs2_inplace_reserve(ip, 1);
+ error = gfs2_inplace_reserve(ip, 1, 0);
if (error)
goto do_grow_qunlock;
unstuff = 1;
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 259b088cfc4c..9a35670fdc38 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1676,16 +1676,11 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name,
be16_add_cpu(&leaf->lf_entries, 1);
}
brelse(bh);
- error = gfs2_meta_inode_buffer(ip, &bh);
- if (error)
- break;
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
ip->i_entries++;
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
if (S_ISDIR(nip->i_inode.i_mode))
inc_nlink(&ip->i_inode);
- gfs2_dinode_out(ip, bh->b_data);
- brelse(bh);
+ mark_inode_dirty(inode);
error = 0;
break;
}
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 0def0504afc1..991ab2d484dd 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -44,7 +44,7 @@
* gfs2_llseek - seek to a location in a file
* @file: the file
* @offset: the offset
- * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
+ * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
*
* SEEK_END requires the glock for the file because it references the
* file's size.
@@ -52,26 +52,26 @@
* Returns: The new offset, or errno
*/
-static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
+static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence)
{
struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
struct gfs2_holder i_gh;
loff_t error;
- switch (origin) {
+ switch (whence) {
case SEEK_END: /* These reference inode->i_size */
case SEEK_DATA:
case SEEK_HOLE:
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
&i_gh);
if (!error) {
- error = generic_file_llseek(file, offset, origin);
+ error = generic_file_llseek(file, offset, whence);
gfs2_glock_dq_uninit(&i_gh);
}
break;
case SEEK_CUR:
case SEEK_SET:
- error = generic_file_llseek(file, offset, origin);
+ error = generic_file_llseek(file, offset, whence);
break;
default:
error = -EINVAL;
@@ -432,7 +432,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
if (ret)
goto out_unlock;
gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks);
- ret = gfs2_inplace_reserve(ip, data_blocks + ind_blocks);
+ ret = gfs2_inplace_reserve(ip, data_blocks + ind_blocks, 0);
if (ret)
goto out_quota_unlock;
@@ -516,15 +516,13 @@ static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
struct gfs2_holder i_gh;
int error;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
- error = gfs2_glock_nq(&i_gh);
- if (error == 0) {
- file_accessed(file);
- gfs2_glock_dq(&i_gh);
- }
- gfs2_holder_uninit(&i_gh);
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
+ &i_gh);
if (error)
return error;
+ /* grab lock to update inode */
+ gfs2_glock_dq_uninit(&i_gh);
+ file_accessed(file);
}
vma->vm_ops = &gfs2_vm_ops;
@@ -677,10 +675,8 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
size_t writesize = iov_length(iov, nr_segs);
struct dentry *dentry = file->f_dentry;
struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- struct gfs2_sbd *sdp;
int ret;
- sdp = GFS2_SB(file->f_mapping->host);
ret = gfs2_rs_alloc(ip);
if (ret)
return ret;
@@ -829,7 +825,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
retry:
gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
- error = gfs2_inplace_reserve(ip, data_blocks + ind_blocks);
+ error = gfs2_inplace_reserve(ip, data_blocks + ind_blocks, 0);
if (error) {
if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) {
bytes >>= 1;
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index e6c2fd53cab2..992c5c0cb504 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -55,8 +55,6 @@ struct gfs2_glock_iter {
typedef void (*glock_examiner) (struct gfs2_glock * gl);
-static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl);
-#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { __dump_glock(NULL, gl); BUG(); } } while(0)
static void do_xmote(struct gfs2_glock *gl, struct gfs2_holder *gh, unsigned int target);
static struct dentry *gfs2_root;
@@ -107,10 +105,12 @@ static void gfs2_glock_dealloc(struct rcu_head *rcu)
{
struct gfs2_glock *gl = container_of(rcu, struct gfs2_glock, gl_rcu);
- if (gl->gl_ops->go_flags & GLOF_ASPACE)
+ if (gl->gl_ops->go_flags & GLOF_ASPACE) {
kmem_cache_free(gfs2_glock_aspace_cachep, gl);
- else
+ } else {
+ kfree(gl->gl_lksb.sb_lvbptr);
kmem_cache_free(gfs2_glock_cachep, gl);
+ }
}
void gfs2_glock_free(struct gfs2_glock *gl)
@@ -537,8 +537,8 @@ __acquires(&gl->gl_spin)
(lck_flags & (LM_FLAG_TRY|LM_FLAG_TRY_1CB)))
clear_bit(GLF_BLOCKING, &gl->gl_flags);
spin_unlock(&gl->gl_spin);
- if (glops->go_xmote_th)
- glops->go_xmote_th(gl);
+ if (glops->go_sync)
+ glops->go_sync(gl);
if (test_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags))
glops->go_inval(gl, target == LM_ST_DEFERRED ? 0 : DIO_METADATA);
clear_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags);
@@ -547,7 +547,10 @@ __acquires(&gl->gl_spin)
if (sdp->sd_lockstruct.ls_ops->lm_lock) {
/* lock_dlm */
ret = sdp->sd_lockstruct.ls_ops->lm_lock(gl, target, lck_flags);
- GLOCK_BUG_ON(gl, ret);
+ if (ret) {
+ printk(KERN_ERR "GFS2: lm_lock ret %d\n", ret);
+ GLOCK_BUG_ON(gl, 1);
+ }
} else { /* lock_nolock */
finish_xmote(gl, target);
if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
@@ -736,6 +739,16 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
if (!gl)
return -ENOMEM;
+ memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb));
+
+ if (glops->go_flags & GLOF_LVB) {
+ gl->gl_lksb.sb_lvbptr = kzalloc(GFS2_MIN_LVB_SIZE, GFP_KERNEL);
+ if (!gl->gl_lksb.sb_lvbptr) {
+ kmem_cache_free(cachep, gl);
+ return -ENOMEM;
+ }
+ }
+
atomic_inc(&sdp->sd_glock_disposal);
gl->gl_sbd = sdp;
gl->gl_flags = 0;
@@ -753,9 +766,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
preempt_enable();
gl->gl_stats.stats[GFS2_LKS_DCOUNT] = 0;
gl->gl_stats.stats[GFS2_LKS_QCOUNT] = 0;
- memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb));
- memset(gl->gl_lvb, 0, 32 * sizeof(char));
- gl->gl_lksb.sb_lvbptr = gl->gl_lvb;
gl->gl_tchange = jiffies;
gl->gl_object = NULL;
gl->gl_hold_time = GL_GLOCK_DFT_HOLD;
@@ -768,7 +778,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
mapping->host = s->s_bdev->bd_inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_NOFS);
- mapping->assoc_mapping = NULL;
+ mapping->private_data = NULL;
mapping->backing_dev_info = s->s_bdi;
mapping->writeback_index = 0;
}
@@ -777,6 +787,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
tmp = search_bucket(hash, sdp, &name);
if (tmp) {
spin_unlock_bucket(hash);
+ kfree(gl->gl_lksb.sb_lvbptr);
kmem_cache_free(cachep, gl);
atomic_dec(&sdp->sd_glock_disposal);
gl = tmp;
@@ -1013,7 +1024,7 @@ trap_recursive:
printk(KERN_ERR "pid: %d\n", pid_nr(gh->gh_owner_pid));
printk(KERN_ERR "lock type: %d req lock state : %d\n",
gh->gh_gl->gl_name.ln_type, gh->gh_state);
- __dump_glock(NULL, gl);
+ gfs2_dump_glock(NULL, gl);
BUG();
}
@@ -1508,7 +1519,7 @@ static int dump_glock(struct seq_file *seq, struct gfs2_glock *gl)
{
int ret;
spin_lock(&gl->gl_spin);
- ret = __dump_glock(seq, gl);
+ ret = gfs2_dump_glock(seq, gl);
spin_unlock(&gl->gl_spin);
return ret;
}
@@ -1528,6 +1539,7 @@ static void dump_glock_func(struct gfs2_glock *gl)
void gfs2_gl_hash_clear(struct gfs2_sbd *sdp)
{
+ set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
glock_hash_walk(clear_glock, sdp);
flush_workqueue(glock_workqueue);
wait_event(sdp->sd_glock_wait, atomic_read(&sdp->sd_glock_disposal) == 0);
@@ -1655,7 +1667,7 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl)
}
/**
- * __dump_glock - print information about a glock
+ * gfs2_dump_glock - print information about a glock
* @seq: The seq_file struct
* @gl: the glock
*
@@ -1672,7 +1684,7 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl)
* Returns: 0 on success, -ENOBUFS when we run out of space
*/
-static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl)
+int gfs2_dump_glock(struct seq_file *seq, const struct gfs2_glock *gl)
{
const struct gfs2_glock_operations *glops = gl->gl_ops;
unsigned long long dtime;
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 307ac31df781..fd580b7861d5 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -178,33 +178,33 @@ static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl)
return NULL;
}
-int gfs2_glock_get(struct gfs2_sbd *sdp,
- u64 number, const struct gfs2_glock_operations *glops,
- int create, struct gfs2_glock **glp);
-void gfs2_glock_hold(struct gfs2_glock *gl);
-void gfs2_glock_put_nolock(struct gfs2_glock *gl);
-void gfs2_glock_put(struct gfs2_glock *gl);
-void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags,
- struct gfs2_holder *gh);
-void gfs2_holder_reinit(unsigned int state, unsigned flags,
- struct gfs2_holder *gh);
-void gfs2_holder_uninit(struct gfs2_holder *gh);
-int gfs2_glock_nq(struct gfs2_holder *gh);
-int gfs2_glock_poll(struct gfs2_holder *gh);
-int gfs2_glock_wait(struct gfs2_holder *gh);
-void gfs2_glock_dq(struct gfs2_holder *gh);
-void gfs2_glock_dq_wait(struct gfs2_holder *gh);
-
-void gfs2_glock_dq_uninit(struct gfs2_holder *gh);
-int gfs2_glock_nq_num(struct gfs2_sbd *sdp,
- u64 number, const struct gfs2_glock_operations *glops,
- unsigned int state, int flags, struct gfs2_holder *gh);
-
-int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
-void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
-void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
-
-__printf(2, 3)
+extern int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
+ const struct gfs2_glock_operations *glops,
+ int create, struct gfs2_glock **glp);
+extern void gfs2_glock_hold(struct gfs2_glock *gl);
+extern void gfs2_glock_put_nolock(struct gfs2_glock *gl);
+extern void gfs2_glock_put(struct gfs2_glock *gl);
+extern void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
+ unsigned flags, struct gfs2_holder *gh);
+extern void gfs2_holder_reinit(unsigned int state, unsigned flags,
+ struct gfs2_holder *gh);
+extern void gfs2_holder_uninit(struct gfs2_holder *gh);
+extern int gfs2_glock_nq(struct gfs2_holder *gh);
+extern int gfs2_glock_poll(struct gfs2_holder *gh);
+extern int gfs2_glock_wait(struct gfs2_holder *gh);
+extern void gfs2_glock_dq(struct gfs2_holder *gh);
+extern void gfs2_glock_dq_wait(struct gfs2_holder *gh);
+extern void gfs2_glock_dq_uninit(struct gfs2_holder *gh);
+extern int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number,
+ const struct gfs2_glock_operations *glops,
+ unsigned int state, int flags,
+ struct gfs2_holder *gh);
+extern int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
+extern void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
+extern void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
+extern int gfs2_dump_glock(struct seq_file *seq, const struct gfs2_glock *gl);
+#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { gfs2_dump_glock(NULL, gl); BUG(); } } while(0)
+extern __printf(2, 3)
void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...);
/**
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 32cc4fde975c..78d4184ffc7d 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -74,7 +74,7 @@ static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
gfs2_trans_add_revoke(sdp, bd);
}
- BUG_ON(!fsync && atomic_read(&gl->gl_ail_count));
+ GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
spin_unlock(&sdp->sd_ail_lock);
gfs2_log_unlock(sdp);
}
@@ -96,7 +96,7 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
tr.tr_ip = (unsigned long)__builtin_return_address(0);
sb_start_intwrite(sdp->sd_vfs);
gfs2_log_reserve(sdp, tr.tr_reserved);
- BUG_ON(current->journal_info);
+ WARN_ON_ONCE(current->journal_info);
current->journal_info = &tr;
__gfs2_ail_flush(gl, 0);
@@ -139,7 +139,7 @@ static void rgrp_go_sync(struct gfs2_glock *gl)
if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
return;
- BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
+ GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
gfs2_log_flush(gl->gl_sbd, gl);
filemap_fdatawrite(metamapping);
@@ -168,7 +168,7 @@ static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
{
struct address_space *mapping = gfs2_glock2aspace(gl);
- BUG_ON(!(flags & DIO_METADATA));
+ WARN_ON_ONCE(!(flags & DIO_METADATA));
gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
truncate_inode_pages(mapping, 0);
@@ -197,7 +197,7 @@ static void inode_go_sync(struct gfs2_glock *gl)
if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
return;
- BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
+ GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
gfs2_log_flush(gl->gl_sbd, gl);
filemap_fdatawrite(metamapping);
@@ -536,7 +536,7 @@ const struct gfs2_glock_operations gfs2_meta_glops = {
};
const struct gfs2_glock_operations gfs2_inode_glops = {
- .go_xmote_th = inode_go_sync,
+ .go_sync = inode_go_sync,
.go_inval = inode_go_inval,
.go_demote_ok = inode_go_demote_ok,
.go_lock = inode_go_lock,
@@ -546,17 +546,17 @@ const struct gfs2_glock_operations gfs2_inode_glops = {
};
const struct gfs2_glock_operations gfs2_rgrp_glops = {
- .go_xmote_th = rgrp_go_sync,
+ .go_sync = rgrp_go_sync,
.go_inval = rgrp_go_inval,
.go_lock = gfs2_rgrp_go_lock,
.go_unlock = gfs2_rgrp_go_unlock,
.go_dump = gfs2_rgrp_dump,
.go_type = LM_TYPE_RGRP,
- .go_flags = GLOF_ASPACE,
+ .go_flags = GLOF_ASPACE | GLOF_LVB,
};
const struct gfs2_glock_operations gfs2_trans_glops = {
- .go_xmote_th = trans_go_sync,
+ .go_sync = trans_go_sync,
.go_xmote_bh = trans_go_xmote_bh,
.go_demote_ok = trans_go_demote_ok,
.go_type = LM_TYPE_NONDISK,
@@ -577,6 +577,7 @@ const struct gfs2_glock_operations gfs2_nondisk_glops = {
const struct gfs2_glock_operations gfs2_quota_glops = {
.go_type = LM_TYPE_QUOTA,
+ .go_flags = GLOF_LVB,
};
const struct gfs2_glock_operations gfs2_journal_glops = {
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 3d469d37345e..c373a24fedd9 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -205,7 +205,7 @@ struct lm_lockname {
struct gfs2_glock_operations {
- void (*go_xmote_th) (struct gfs2_glock *gl);
+ void (*go_sync) (struct gfs2_glock *gl);
int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
void (*go_inval) (struct gfs2_glock *gl, int flags);
int (*go_demote_ok) (const struct gfs2_glock *gl);
@@ -216,6 +216,7 @@ struct gfs2_glock_operations {
const int go_type;
const unsigned long go_flags;
#define GLOF_ASPACE 1
+#define GLOF_LVB 2
};
enum {
@@ -321,7 +322,6 @@ struct gfs2_glock {
ktime_t gl_dstamp;
struct gfs2_lkstats gl_stats;
struct dlm_lksb gl_lksb;
- char gl_lvb[32];
unsigned long gl_tchange;
void *gl_object;
@@ -539,6 +539,7 @@ enum {
SDF_DEMOTE = 5,
SDF_NOJOURNALID = 6,
SDF_RORECOVERY = 7, /* read only recovery */
+ SDF_SKIP_DLM_UNLOCK = 8,
};
#define GFS2_FSNAME_LEN 256
@@ -621,6 +622,7 @@ struct gfs2_sbd {
u32 sd_hash_bsize_shift;
u32 sd_hash_ptrs; /* Number of pointers in a hash block */
u32 sd_qc_per_block;
+ u32 sd_blocks_per_bitmap;
u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
u32 sd_max_height; /* Max height of a file's metadata tree */
u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 381893ceefa4..2b6f5698ef18 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -364,34 +364,34 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
return 0;
}
-static void munge_mode_uid_gid(struct gfs2_inode *dip, umode_t *mode,
- unsigned int *uid, unsigned int *gid)
+static void munge_mode_uid_gid(const struct gfs2_inode *dip,
+ struct inode *inode)
{
if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
(dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
- if (S_ISDIR(*mode))
- *mode |= S_ISUID;
+ if (S_ISDIR(inode->i_mode))
+ inode->i_mode |= S_ISUID;
else if (dip->i_inode.i_uid != current_fsuid())
- *mode &= ~07111;
- *uid = dip->i_inode.i_uid;
+ inode->i_mode &= ~07111;
+ inode->i_uid = dip->i_inode.i_uid;
} else
- *uid = current_fsuid();
+ inode->i_uid = current_fsuid();
if (dip->i_inode.i_mode & S_ISGID) {
- if (S_ISDIR(*mode))
- *mode |= S_ISGID;
- *gid = dip->i_inode.i_gid;
+ if (S_ISDIR(inode->i_mode))
+ inode->i_mode |= S_ISGID;
+ inode->i_gid = dip->i_inode.i_gid;
} else
- *gid = current_fsgid();
+ inode->i_gid = current_fsgid();
}
-static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
+static int alloc_dinode(struct gfs2_inode *ip, u32 flags)
{
- struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
int error;
int dblocks = 1;
- error = gfs2_inplace_reserve(dip, RES_DINODE);
+ error = gfs2_inplace_reserve(ip, RES_DINODE, flags);
if (error)
goto out;
@@ -399,12 +399,15 @@ static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
if (error)
goto out_ipreserv;
- error = gfs2_alloc_blocks(dip, no_addr, &dblocks, 1, generation);
+ error = gfs2_alloc_blocks(ip, &ip->i_no_addr, &dblocks, 1, &ip->i_generation);
+ ip->i_no_formal_ino = ip->i_generation;
+ ip->i_inode.i_ino = ip->i_no_addr;
+ ip->i_goal = ip->i_no_addr;
gfs2_trans_end(sdp);
out_ipreserv:
- gfs2_inplace_release(dip);
+ gfs2_inplace_release(ip);
out:
return error;
}
@@ -429,52 +432,42 @@ static void gfs2_init_dir(struct buffer_head *dibh,
/**
* init_dinode - Fill in a new dinode structure
* @dip: The directory this inode is being created in
- * @gl: The glock covering the new inode
- * @inum: The inode number
- * @mode: The file permissions
- * @uid: The uid of the new inode
- * @gid: The gid of the new inode
- * @generation: The generation number of the new inode
- * @dev: The device number (if a device node)
+ * @ip: The inode
* @symname: The symlink destination (if a symlink)
- * @size: The inode size (ignored for directories)
* @bhp: The buffer head (returned to caller)
*
*/
-static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
- const struct gfs2_inum_host *inum, umode_t mode,
- unsigned int uid, unsigned int gid,
- const u64 *generation, dev_t dev, const char *symname,
- unsigned size, struct buffer_head **bhp)
+static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
+ const char *symname, struct buffer_head **bhp)
{
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_dinode *di;
struct buffer_head *dibh;
struct timespec tv = CURRENT_TIME;
- dibh = gfs2_meta_new(gl, inum->no_addr);
- gfs2_trans_add_bh(gl, dibh, 1);
+ dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
di = (struct gfs2_dinode *)dibh->b_data;
- di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
- di->di_num.no_addr = cpu_to_be64(inum->no_addr);
- di->di_mode = cpu_to_be32(mode);
- di->di_uid = cpu_to_be32(uid);
- di->di_gid = cpu_to_be32(gid);
+ di->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
+ di->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
+ di->di_mode = cpu_to_be32(ip->i_inode.i_mode);
+ di->di_uid = cpu_to_be32(ip->i_inode.i_uid);
+ di->di_gid = cpu_to_be32(ip->i_inode.i_gid);
di->di_nlink = 0;
- di->di_size = cpu_to_be64(size);
+ di->di_size = cpu_to_be64(ip->i_inode.i_size);
di->di_blocks = cpu_to_be64(1);
di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
- di->di_major = cpu_to_be32(MAJOR(dev));
- di->di_minor = cpu_to_be32(MINOR(dev));
- di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
- di->di_generation = cpu_to_be64(*generation);
+ di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev));
+ di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev));
+ di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_no_addr);
+ di->di_generation = cpu_to_be64(ip->i_generation);
di->di_flags = 0;
di->__pad1 = 0;
- di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
+ di->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) ? GFS2_FORMAT_DE : 0);
di->di_height = 0;
di->__pad2 = 0;
di->__pad3 = 0;
@@ -487,7 +480,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
memset(&di->di_reserved, 0, sizeof(di->di_reserved));
- switch(mode & S_IFMT) {
+ switch(ip->i_inode.i_mode & S_IFMT) {
case S_IFREG:
if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
gfs2_tune_get(sdp, gt_new_files_jdata))
@@ -502,7 +495,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
gfs2_init_dir(dibh, dip);
break;
case S_IFLNK:
- memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size);
+ memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
break;
}
@@ -511,25 +504,22 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
*bhp = dibh;
}
-static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
- umode_t mode, const struct gfs2_inum_host *inum,
- const u64 *generation, dev_t dev, const char *symname,
- unsigned int size, struct buffer_head **bhp)
+static int make_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
+ const char *symname, struct buffer_head **bhp)
{
+ struct inode *inode = &ip->i_inode;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
- unsigned int uid, gid;
int error;
- munge_mode_uid_gid(dip, &mode, &uid, &gid);
error = gfs2_rindex_update(sdp);
if (error)
return error;
- error = gfs2_quota_lock(dip, uid, gid);
+ error = gfs2_quota_lock(dip, inode->i_uid, inode->i_gid);
if (error)
return error;
- error = gfs2_quota_check(dip, uid, gid);
+ error = gfs2_quota_check(dip, inode->i_uid, inode->i_gid);
if (error)
goto out_quota;
@@ -537,8 +527,8 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
if (error)
goto out_quota;
- init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp);
- gfs2_quota_change(dip, +1, uid, gid);
+ init_dinode(dip, ip, symname, bhp);
+ gfs2_quota_change(dip, +1, inode->i_uid, inode->i_gid);
gfs2_trans_end(sdp);
out_quota:
@@ -570,7 +560,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
if (error)
goto fail_quota_locks;
- error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres);
+ error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0);
if (error)
goto fail_quota_locks;
@@ -657,19 +647,14 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir), *ip;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
- struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
+ struct gfs2_glock *io_gl;
int error;
- u64 generation;
struct buffer_head *bh = NULL;
+ u32 aflags = 0;
if (!name->len || name->len > GFS2_FNAMESIZE)
return -ENAMETOOLONG;
- /* We need a reservation to allocate the new dinode block. The
- directory ip temporarily points to the reservation, but this is
- being done to get a set of contiguous blocks for the new dinode.
- Since this is a create, we don't have a sizehint yet, so it will
- have to use the minimum reservation size. */
error = gfs2_rs_alloc(dip);
if (error)
return error;
@@ -688,45 +673,72 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
if (error)
goto fail_gunlock;
- error = alloc_dinode(dip, &inum.no_addr, &generation);
+ inode = new_inode(sdp->sd_vfs);
+ if (!inode) {
+ gfs2_glock_dq_uninit(ghs);
+ return -ENOMEM;
+ }
+ ip = GFS2_I(inode);
+ error = gfs2_rs_alloc(ip);
if (error)
- goto fail_gunlock;
- inum.no_formal_ino = generation;
+ goto fail_free_inode;
+
+ set_bit(GIF_INVALID, &ip->i_flags);
+ inode->i_mode = mode;
+ inode->i_rdev = dev;
+ inode->i_size = size;
+ munge_mode_uid_gid(dip, inode);
+ ip->i_goal = dip->i_goal;
- error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
- LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+ if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) ||
+ (dip->i_diskflags & GFS2_DIF_TOPDIR))
+ aflags |= GFS2_AF_ORLOV;
+
+ error = alloc_dinode(ip, aflags);
if (error)
- goto fail_gunlock;
+ goto fail_free_inode;
- error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh);
+ error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
if (error)
- goto fail_gunlock2;
+ goto fail_free_inode;
- inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
- inum.no_formal_ino, 0);
- if (IS_ERR(inode))
+ ip->i_gl->gl_object = ip;
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+ if (error)
+ goto fail_free_inode;
+
+ error = make_dinode(dip, ip, symname, &bh);
+ if (error)
goto fail_gunlock2;
- ip = GFS2_I(inode);
- error = gfs2_inode_refresh(ip);
+ error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (error)
goto fail_gunlock2;
- error = gfs2_rs_alloc(ip);
+ error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (error)
goto fail_gunlock2;
+ ip->i_iopen_gh.gh_gl->gl_object = ip;
+ gfs2_glock_put(io_gl);
+ gfs2_set_iop(inode);
+ insert_inode_hash(inode);
+
+ error = gfs2_inode_refresh(ip);
+ if (error)
+ goto fail_gunlock3;
+
error = gfs2_acl_create(dip, inode);
if (error)
- goto fail_gunlock2;
+ goto fail_gunlock3;
error = gfs2_security_init(dip, ip, name);
if (error)
- goto fail_gunlock2;
+ goto fail_gunlock3;
error = link_dinode(dip, name, ip);
if (error)
- goto fail_gunlock2;
+ goto fail_gunlock3;
if (bh)
brelse(bh);
@@ -739,8 +751,20 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
d_instantiate(dentry, inode);
return 0;
+fail_gunlock3:
+ gfs2_glock_dq_uninit(ghs + 1);
+ if (ip->i_gl)
+ gfs2_glock_put(ip->i_gl);
+ goto fail_gunlock;
+
fail_gunlock2:
gfs2_glock_dq_uninit(ghs + 1);
+fail_free_inode:
+ if (ip->i_gl)
+ gfs2_glock_put(ip->i_gl);
+ gfs2_rs_delete(ip);
+ free_inode_nonrcu(inode);
+ inode = NULL;
fail_gunlock:
gfs2_glock_dq_uninit(ghs);
if (inode && !IS_ERR(inode)) {
@@ -748,7 +772,6 @@ fail_gunlock:
iput(inode);
}
fail:
- gfs2_rs_delete(dip);
if (bh)
brelse(bh);
return error;
@@ -884,7 +907,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
if (error)
goto out_gunlock;
- error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres);
+ error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0);
if (error)
goto out_gunlock_q;
@@ -977,7 +1000,6 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
* gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
* @dip: The parent directory
* @name: The name of the entry in the parent directory
- * @bh: The inode buffer for the inode to be removed
* @inode: The inode to be removed
*
* Called with all the locks and in a transaction. This will only be
@@ -987,8 +1009,7 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
*/
static int gfs2_unlink_inode(struct gfs2_inode *dip,
- const struct dentry *dentry,
- struct buffer_head *bh)
+ const struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
struct gfs2_inode *ip = GFS2_I(inode);
@@ -1028,7 +1049,6 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
struct gfs2_sbd *sdp = GFS2_SB(dir);
struct inode *inode = dentry->d_inode;
struct gfs2_inode *ip = GFS2_I(inode);
- struct buffer_head *bh;
struct gfs2_holder ghs[3];
struct gfs2_rgrpd *rgd;
int error;
@@ -1077,14 +1097,9 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
if (error)
- goto out_gunlock;
-
- error = gfs2_meta_inode_buffer(ip, &bh);
- if (error)
goto out_end_trans;
- error = gfs2_unlink_inode(dip, dentry, bh);
- brelse(bh);
+ error = gfs2_unlink_inode(dip, dentry);
out_end_trans:
gfs2_trans_end(sdp);
@@ -1365,7 +1380,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
if (error)
goto out_gunlock;
- error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres);
+ error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres, 0);
if (error)
goto out_gunlock_q;
@@ -1384,14 +1399,8 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
/* Remove the target file, if it exists */
- if (nip) {
- struct buffer_head *bh;
- error = gfs2_meta_inode_buffer(nip, &bh);
- if (error)
- goto out_end_trans;
- error = gfs2_unlink_inode(ndip, ndentry, bh);
- brelse(bh);
- }
+ if (nip)
+ error = gfs2_unlink_inode(ndip, ndentry);
if (dir_rename) {
error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 0fb6539b0c8c..9802de0f85e6 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -120,8 +120,8 @@ static void gdlm_ast(void *arg)
gfs2_update_reply_times(gl);
BUG_ON(gl->gl_lksb.sb_flags & DLM_SBF_DEMOTED);
- if (gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID)
- memset(gl->gl_lvb, 0, GDLM_LVB_SIZE);
+ if ((gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID) && gl->gl_lksb.sb_lvbptr)
+ memset(gl->gl_lksb.sb_lvbptr, 0, GDLM_LVB_SIZE);
switch (gl->gl_lksb.sb_status) {
case -DLM_EUNLOCK: /* Unlocked, so glock can be freed */
@@ -203,8 +203,10 @@ static int make_mode(const unsigned int lmstate)
static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags,
const int req)
{
- u32 lkf = DLM_LKF_VALBLK;
- u32 lkid = gl->gl_lksb.sb_lkid;
+ u32 lkf = 0;
+
+ if (gl->gl_lksb.sb_lvbptr)
+ lkf |= DLM_LKF_VALBLK;
if (gfs_flags & LM_FLAG_TRY)
lkf |= DLM_LKF_NOQUEUE;
@@ -228,7 +230,7 @@ static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags,
BUG();
}
- if (lkid != 0) {
+ if (gl->gl_lksb.sb_lkid != 0) {
lkf |= DLM_LKF_CONVERT;
if (test_bit(GLF_BLOCKING, &gl->gl_flags))
lkf |= DLM_LKF_QUECVT;
@@ -239,6 +241,7 @@ static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags,
static void gfs2_reverse_hex(char *c, u64 value)
{
+ *c = '0';
while (value) {
*c-- = hex_asc[value & 0x0f];
value >>= 4;
@@ -278,6 +281,7 @@ static void gdlm_put_lock(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
+ int lvb_needs_unlock = 0;
int error;
if (gl->gl_lksb.sb_lkid == 0) {
@@ -289,6 +293,18 @@ static void gdlm_put_lock(struct gfs2_glock *gl)
gfs2_glstats_inc(gl, GFS2_LKS_DCOUNT);
gfs2_sbstats_inc(gl, GFS2_LKS_DCOUNT);
gfs2_update_request_times(gl);
+
+ /* don't want to skip dlm_unlock writing the lvb when lock is ex */
+
+ if (gl->gl_lksb.sb_lvbptr && (gl->gl_state == LM_ST_EXCLUSIVE))
+ lvb_needs_unlock = 1;
+
+ if (test_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags) &&
+ !lvb_needs_unlock) {
+ gfs2_glock_free(gl);
+ return;
+ }
+
error = dlm_unlock(ls->ls_dlm, gl->gl_lksb.sb_lkid, DLM_LKF_VALBLK,
NULL, gl);
if (error) {
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 8ff95a2d54ee..9ceccb1595a3 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -393,12 +393,10 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
struct gfs2_meta_header *mh;
struct gfs2_trans *tr;
- lock_buffer(bd->bd_bh);
- gfs2_log_lock(sdp);
tr = current->journal_info;
tr->tr_touched = 1;
if (!list_empty(&bd->bd_list))
- goto out;
+ return;
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
@@ -414,9 +412,6 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
sdp->sd_log_num_buf++;
list_add(&bd->bd_list, &sdp->sd_log_le_buf);
tr->tr_num_buf_new++;
-out:
- gfs2_log_unlock(sdp);
- unlock_buffer(bd->bd_bh);
}
static void gfs2_check_magic(struct buffer_head *bh)
@@ -621,7 +616,6 @@ static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
{
- struct gfs2_log_descriptor *ld;
struct gfs2_meta_header *mh;
unsigned int offset;
struct list_head *head = &sdp->sd_log_le_revoke;
@@ -634,7 +628,6 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64));
page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke);
- ld = page_address(page);
offset = sizeof(struct gfs2_log_descriptor);
list_for_each_entry(bd, head, bd_list) {
@@ -777,12 +770,10 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
struct address_space *mapping = bd->bd_bh->b_page->mapping;
struct gfs2_inode *ip = GFS2_I(mapping->host);
- lock_buffer(bd->bd_bh);
- gfs2_log_lock(sdp);
if (tr)
tr->tr_touched = 1;
if (!list_empty(&bd->bd_list))
- goto out;
+ return;
set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
if (gfs2_is_jdata(ip)) {
@@ -793,9 +784,6 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
} else {
list_add_tail(&bd->bd_list, &sdp->sd_log_le_ordered);
}
-out:
- gfs2_log_unlock(sdp);
- unlock_buffer(bd->bd_bh);
}
/**
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index e443966c8106..0e3554edb8f2 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -278,6 +278,9 @@ static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
sizeof(struct gfs2_meta_header)) /
sizeof(struct gfs2_quota_change);
+ sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_meta_header))
+ * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
/* Compute maximum reservation required to add a entry to a directory */
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 40c4b0d42fa8..ae55e248c3b7 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -497,8 +497,11 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
struct gfs2_quota_data **qd;
int error;
- if (ip->i_res == NULL)
- gfs2_rs_alloc(ip);
+ if (ip->i_res == NULL) {
+ error = gfs2_rs_alloc(ip);
+ if (error)
+ return error;
+ }
qd = ip->i_res->rs_qa_qd;
@@ -813,7 +816,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
reserved = 1 + (nalloc * (data_blocks + ind_blocks));
- error = gfs2_inplace_reserve(ip, reserved);
+ error = gfs2_inplace_reserve(ip, reserved, 0);
if (error)
goto out_alloc;
@@ -866,7 +869,7 @@ static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
if (error < 0)
return error;
- qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+ qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
qlvb->__pad = 0;
qlvb->qb_limit = q.qu_limit;
@@ -890,7 +893,7 @@ restart:
if (error)
return error;
- qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+ qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
gfs2_glock_dq_uninit(q_gh);
@@ -1503,7 +1506,7 @@ static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
if (error)
goto out;
- qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+ qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
fdq->d_version = FS_DQUOT_VERSION;
fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA;
fdq->d_id = from_kqid(&init_user_ns, qid);
@@ -1602,7 +1605,7 @@ static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
&data_blocks, &ind_blocks);
blocks = 1 + data_blocks + ind_blocks;
- error = gfs2_inplace_reserve(ip, blocks);
+ error = gfs2_inplace_reserve(ip, blocks, 0);
if (error)
goto out_i;
blocks += gfs2_rg_blocks(ip, blocks);
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 3cc402ce6fea..b7eff078fe90 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -16,6 +16,7 @@
#include <linux/prefetch.h>
#include <linux/blkdev.h>
#include <linux/rbtree.h>
+#include <linux/random.h>
#include "gfs2.h"
#include "incore.h"
@@ -251,22 +252,25 @@ static u32 gfs2_bitfit(const u8 *buf, const unsigned int len,
static int gfs2_rbm_from_block(struct gfs2_rbm *rbm, u64 block)
{
u64 rblock = block - rbm->rgd->rd_data0;
- u32 goal = (u32)rblock;
- int x;
+ u32 x;
if (WARN_ON_ONCE(rblock > UINT_MAX))
return -EINVAL;
if (block >= rbm->rgd->rd_data0 + rbm->rgd->rd_data)
return -E2BIG;
- for (x = 0; x < rbm->rgd->rd_length; x++) {
- rbm->bi = rbm->rgd->rd_bits + x;
- if (goal < (rbm->bi->bi_start + rbm->bi->bi_len) * GFS2_NBBY) {
- rbm->offset = goal - (rbm->bi->bi_start * GFS2_NBBY);
- break;
- }
- }
+ rbm->bi = rbm->rgd->rd_bits;
+ rbm->offset = (u32)(rblock);
+ /* Check if the block is within the first block */
+ if (rbm->offset < (rbm->bi->bi_start + rbm->bi->bi_len) * GFS2_NBBY)
+ return 0;
+ /* Adjust for the size diff between gfs2_meta_header and gfs2_rgrp */
+ rbm->offset += (sizeof(struct gfs2_rgrp) -
+ sizeof(struct gfs2_meta_header)) * GFS2_NBBY;
+ x = rbm->offset / rbm->rgd->rd_sbd->sd_blocks_per_bitmap;
+ rbm->offset -= x * rbm->rgd->rd_sbd->sd_blocks_per_bitmap;
+ rbm->bi += x;
return 0;
}
@@ -346,10 +350,14 @@ static u32 gfs2_free_extlen(const struct gfs2_rbm *rrbm, u32 len)
BUG_ON(len < chunk_size);
len -= chunk_size;
block = gfs2_rbm_to_block(&rbm);
- gfs2_rbm_from_block(&rbm, block + chunk_size);
- n_unaligned = 3;
- if (ptr)
+ if (gfs2_rbm_from_block(&rbm, block + chunk_size)) {
+ n_unaligned = 0;
+ break;
+ }
+ if (ptr) {
+ n_unaligned = 3;
break;
+ }
n_unaligned = len & 3;
}
@@ -554,24 +562,21 @@ void gfs2_free_clones(struct gfs2_rgrpd *rgd)
int gfs2_rs_alloc(struct gfs2_inode *ip)
{
int error = 0;
- struct gfs2_blkreserv *res;
+ down_write(&ip->i_rw_mutex);
if (ip->i_res)
- return 0;
+ goto out;
- res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS);
- if (!res)
+ ip->i_res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS);
+ if (!ip->i_res) {
error = -ENOMEM;
+ goto out;
+ }
- RB_CLEAR_NODE(&res->rs_node);
-
- down_write(&ip->i_rw_mutex);
- if (ip->i_res)
- kmem_cache_free(gfs2_rsrv_cachep, res);
- else
- ip->i_res = res;
+ RB_CLEAR_NODE(&ip->i_res->rs_node);
+out:
up_write(&ip->i_rw_mutex);
- return error;
+ return 0;
}
static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs)
@@ -876,7 +881,7 @@ static int read_rindex_entry(struct gfs2_inode *ip)
goto fail;
rgd->rd_gl->gl_object = rgd;
- rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lvb;
+ rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lksb.sb_lvbptr;
rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
if (rgd->rd_data > sdp->sd_max_rg_data)
sdp->sd_max_rg_data = rgd->rd_data;
@@ -1263,7 +1268,9 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
int ret = 0;
u64 amt;
u64 trimmed = 0;
+ u64 start, end, minlen;
unsigned int x;
+ unsigned bs_shift = sdp->sd_sb.sb_bsize_shift;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -1271,19 +1278,25 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
- if (argp == NULL) {
- r.start = 0;
- r.len = ULLONG_MAX;
- r.minlen = 0;
- } else if (copy_from_user(&r, argp, sizeof(r)))
+ if (copy_from_user(&r, argp, sizeof(r)))
return -EFAULT;
ret = gfs2_rindex_update(sdp);
if (ret)
return ret;
- rgd = gfs2_blk2rgrpd(sdp, r.start, 0);
- rgd_end = gfs2_blk2rgrpd(sdp, r.start + r.len, 0);
+ start = r.start >> bs_shift;
+ end = start + (r.len >> bs_shift);
+ minlen = max_t(u64, r.minlen,
+ q->limits.discard_granularity) >> bs_shift;
+
+ rgd = gfs2_blk2rgrpd(sdp, start, 0);
+ rgd_end = gfs2_blk2rgrpd(sdp, end - 1, 0);
+
+ if (end <= start ||
+ minlen > sdp->sd_max_rg_data ||
+ start > rgd_end->rd_data0 + rgd_end->rd_data)
+ return -EINVAL;
while (1) {
@@ -1295,7 +1308,9 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
/* Trim each bitmap in the rgrp */
for (x = 0; x < rgd->rd_length; x++) {
struct gfs2_bitmap *bi = rgd->rd_bits + x;
- ret = gfs2_rgrp_send_discards(sdp, rgd->rd_data0, NULL, bi, r.minlen, &amt);
+ ret = gfs2_rgrp_send_discards(sdp,
+ rgd->rd_data0, NULL, bi, minlen,
+ &amt);
if (ret) {
gfs2_glock_dq_uninit(&gh);
goto out;
@@ -1324,7 +1339,7 @@ int gfs2_fitrim(struct file *filp, void __user *argp)
out:
r.len = trimmed << 9;
- if (argp && copy_to_user(argp, &r, sizeof(r)))
+ if (copy_to_user(argp, &r, sizeof(r)))
return -EFAULT;
return ret;
@@ -1411,6 +1426,9 @@ static void rg_mblk_search(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip,
rs->rs_free = extlen;
rs->rs_inum = ip->i_no_addr;
rs_insert(ip);
+ } else {
+ if (goal == rgd->rd_last_alloc + rgd->rd_data0)
+ rgd->rd_last_alloc = 0;
}
}
@@ -1669,13 +1687,105 @@ static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip
return;
}
+/**
+ * gfs2_rgrp_congested - Use stats to figure out whether an rgrp is congested
+ * @rgd: The rgrp in question
+ * @loops: An indication of how picky we can be (0=very, 1=less so)
+ *
+ * This function uses the recently added glock statistics in order to
+ * figure out whether a parciular resource group is suffering from
+ * contention from multiple nodes. This is done purely on the basis
+ * of timings, since this is the only data we have to work with and
+ * our aim here is to reject a resource group which is highly contended
+ * but (very important) not to do this too often in order to ensure that
+ * we do not land up introducing fragmentation by changing resource
+ * groups when not actually required.
+ *
+ * The calculation is fairly simple, we want to know whether the SRTTB
+ * (i.e. smoothed round trip time for blocking operations) to acquire
+ * the lock for this rgrp's glock is significantly greater than the
+ * time taken for resource groups on average. We introduce a margin in
+ * the form of the variable @var which is computed as the sum of the two
+ * respective variences, and multiplied by a factor depending on @loops
+ * and whether we have a lot of data to base the decision on. This is
+ * then tested against the square difference of the means in order to
+ * decide whether the result is statistically significant or not.
+ *
+ * Returns: A boolean verdict on the congestion status
+ */
+
+static bool gfs2_rgrp_congested(const struct gfs2_rgrpd *rgd, int loops)
+{
+ const struct gfs2_glock *gl = rgd->rd_gl;
+ const struct gfs2_sbd *sdp = gl->gl_sbd;
+ struct gfs2_lkstats *st;
+ s64 r_dcount, l_dcount;
+ s64 r_srttb, l_srttb;
+ s64 srttb_diff;
+ s64 sqr_diff;
+ s64 var;
+
+ preempt_disable();
+ st = &this_cpu_ptr(sdp->sd_lkstats)->lkstats[LM_TYPE_RGRP];
+ r_srttb = st->stats[GFS2_LKS_SRTTB];
+ r_dcount = st->stats[GFS2_LKS_DCOUNT];
+ var = st->stats[GFS2_LKS_SRTTVARB] +
+ gl->gl_stats.stats[GFS2_LKS_SRTTVARB];
+ preempt_enable();
+
+ l_srttb = gl->gl_stats.stats[GFS2_LKS_SRTTB];
+ l_dcount = gl->gl_stats.stats[GFS2_LKS_DCOUNT];
+
+ if ((l_dcount < 1) || (r_dcount < 1) || (r_srttb == 0))
+ return false;
+
+ srttb_diff = r_srttb - l_srttb;
+ sqr_diff = srttb_diff * srttb_diff;
+
+ var *= 2;
+ if (l_dcount < 8 || r_dcount < 8)
+ var *= 2;
+ if (loops == 1)
+ var *= 2;
+
+ return ((srttb_diff < 0) && (sqr_diff > var));
+}
+
+/**
+ * gfs2_rgrp_used_recently
+ * @rs: The block reservation with the rgrp to test
+ * @msecs: The time limit in milliseconds
+ *
+ * Returns: True if the rgrp glock has been used within the time limit
+ */
+static bool gfs2_rgrp_used_recently(const struct gfs2_blkreserv *rs,
+ u64 msecs)
+{
+ u64 tdiff;
+
+ tdiff = ktime_to_ns(ktime_sub(ktime_get_real(),
+ rs->rs_rbm.rgd->rd_gl->gl_dstamp));
+
+ return tdiff > (msecs * 1000 * 1000);
+}
+
+static u32 gfs2_orlov_skip(const struct gfs2_inode *ip)
+{
+ const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+ u32 skip;
+
+ get_random_bytes(&skip, sizeof(skip));
+ return skip % sdp->sd_rgrps;
+}
+
static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *begin)
{
struct gfs2_rgrpd *rgd = *pos;
+ struct gfs2_sbd *sdp = rgd->rd_sbd;
rgd = gfs2_rgrpd_get_next(rgd);
if (rgd == NULL)
- rgd = gfs2_rgrpd_get_next(NULL);
+ rgd = gfs2_rgrpd_get_first(sdp);
*pos = rgd;
if (rgd != begin) /* If we didn't wrap */
return true;
@@ -1690,14 +1800,15 @@ static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *b
* Returns: errno
*/
-int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested)
+int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 aflags)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrpd *begin = NULL;
struct gfs2_blkreserv *rs = ip->i_res;
- int error = 0, rg_locked, flags = LM_FLAG_TRY;
+ int error = 0, rg_locked, flags = 0;
u64 last_unlinked = NO_BLOCK;
int loops = 0;
+ u32 skip = 0;
if (sdp->sd_args.ar_rgrplvb)
flags |= GL_SKIP;
@@ -1711,6 +1822,8 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested)
} else {
rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1);
}
+ if (S_ISDIR(ip->i_inode.i_mode) && (aflags & GFS2_AF_ORLOV))
+ skip = gfs2_orlov_skip(ip);
if (rs->rs_rbm.rgd == NULL)
return -EBADSLT;
@@ -1719,13 +1832,20 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested)
if (!gfs2_glock_is_locked_by_me(rs->rs_rbm.rgd->rd_gl)) {
rg_locked = 0;
+ if (skip && skip--)
+ goto next_rgrp;
+ if (!gfs2_rs_active(rs) && (loops < 2) &&
+ gfs2_rgrp_used_recently(rs, 1000) &&
+ gfs2_rgrp_congested(rs->rs_rbm.rgd, loops))
+ goto next_rgrp;
error = gfs2_glock_nq_init(rs->rs_rbm.rgd->rd_gl,
LM_ST_EXCLUSIVE, flags,
&rs->rs_rgd_gh);
- if (error == GLR_TRYFAILED)
- goto next_rgrp;
if (unlikely(error))
return error;
+ if (!gfs2_rs_active(rs) && (loops < 2) &&
+ gfs2_rgrp_congested(rs->rs_rbm.rgd, loops))
+ goto skip_rgrp;
if (sdp->sd_args.ar_rgrplvb) {
error = update_rgrp_lvb(rs->rs_rbm.rgd);
if (unlikely(error)) {
@@ -1772,12 +1892,13 @@ next_rgrp:
/* Find the next rgrp, and continue looking */
if (gfs2_select_rgrp(&rs->rs_rbm.rgd, begin))
continue;
+ if (skip)
+ continue;
/* If we've scanned all the rgrps, but found no free blocks
* then this checks for some less likely conditions before
* trying again.
*/
- flags &= ~LM_FLAG_TRY;
loops++;
/* Check that fs hasn't grown if writing to rindex */
if (ip == GFS2_I(sdp->sd_rindex) && !sdp->sd_rindex_uptodate) {
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index 24077958dcf6..842185853f6b 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -39,7 +39,8 @@ extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
-extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested);
+#define GFS2_AF_ORLOV 1
+extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 flags);
extern void gfs2_inplace_release(struct gfs2_inode *ip);
extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index bc737261f234..d6488674d916 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -810,7 +810,8 @@ static void gfs2_dirty_inode(struct inode *inode, int flags)
return;
}
need_unlock = 1;
- }
+ } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
+ return;
if (current->journal_info == NULL) {
ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h
index bbdc78af60ca..2ee13e841e9f 100644
--- a/fs/gfs2/trace_gfs2.h
+++ b/fs/gfs2/trace_gfs2.h
@@ -486,7 +486,7 @@ TRACE_EVENT(gfs2_block_alloc,
),
TP_fast_assign(
- __entry->dev = ip->i_gl->gl_sbd->sd_vfs->s_dev;
+ __entry->dev = rgd->rd_gl->gl_sbd->sd_vfs->s_dev;
__entry->start = block;
__entry->inum = ip->i_no_addr;
__entry->len = len;
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index adbd27875ef9..413627072f36 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -155,14 +155,22 @@ void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
struct gfs2_sbd *sdp = gl->gl_sbd;
struct gfs2_bufdata *bd;
+ lock_buffer(bh);
+ gfs2_log_lock(sdp);
bd = bh->b_private;
if (bd)
gfs2_assert(sdp, bd->bd_gl == gl);
else {
+ gfs2_log_unlock(sdp);
+ unlock_buffer(bh);
gfs2_attach_bufdata(gl, bh, meta);
bd = bh->b_private;
+ lock_buffer(bh);
+ gfs2_log_lock(sdp);
}
lops_add(sdp, bd);
+ gfs2_log_unlock(sdp);
+ unlock_buffer(bh);
}
void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index db330e5518cd..76c144b3c9bb 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -734,7 +734,7 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
if (error)
return error;
- error = gfs2_inplace_reserve(ip, blks);
+ error = gfs2_inplace_reserve(ip, blks, 0);
if (error)
goto out_gunlock_q;
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 0b35903219bc..d47f11658c17 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -35,6 +35,16 @@ static int hfs_readpage(struct file *file, struct page *page)
return block_read_full_page(page, hfs_get_block);
}
+static void hfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ hfs_file_truncate(inode);
+ }
+}
+
static int hfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -45,11 +55,8 @@ static int hfs_write_begin(struct file *file, struct address_space *mapping,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfs_get_block,
&HFS_I(mapping->host)->phys_size);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ hfs_write_failed(mapping, pos + len);
return ret;
}
@@ -120,6 +127,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
ssize_t ret;
@@ -135,7 +143,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
loff_t end = offset + iov_length(iov, nr_segs);
if (end > isize)
- vmtruncate(inode, isize);
+ hfs_write_failed(mapping, end);
}
return ret;
@@ -617,9 +625,12 @@ int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
attr->ia_size != i_size_read(inode)) {
inode_dio_wait(inode);
- error = vmtruncate(inode, attr->ia_size);
+ error = inode_newsize_ok(inode, attr->ia_size);
if (error)
return error;
+
+ truncate_setsize(inode, attr->ia_size);
+ hfs_file_truncate(inode);
}
setattr_copy(inode, attr);
@@ -668,7 +679,6 @@ static const struct file_operations hfs_file_operations = {
static const struct inode_operations hfs_file_inode_operations = {
.lookup = hfs_file_lookup,
- .truncate = hfs_file_truncate,
.setattr = hfs_inode_setattr,
.setxattr = hfs_setxattr,
.getxattr = hfs_getxattr,
diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
index 4cfbe2edd296..6feefc0cb48a 100644
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@@ -176,12 +176,14 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
dprint(DBG_BITMAP, "block_free: %u,%u\n", offset, count);
/* are all of the bits in range? */
if ((offset + count) > sbi->total_blocks)
- return -2;
+ return -ENOENT;
mutex_lock(&sbi->alloc_mutex);
mapping = sbi->alloc_file->i_mapping;
pnr = offset / PAGE_CACHE_BITS;
page = read_mapping_page(mapping, pnr, NULL);
+ if (IS_ERR(page))
+ goto kaboom;
pptr = kmap(page);
curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
end = pptr + PAGE_CACHE_BITS / 32;
@@ -214,6 +216,8 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
set_page_dirty(page);
kunmap(page);
page = read_mapping_page(mapping, ++pnr, NULL);
+ if (IS_ERR(page))
+ goto kaboom;
pptr = kmap(page);
curr = pptr;
end = pptr + PAGE_CACHE_BITS / 32;
@@ -232,4 +236,11 @@ out:
mutex_unlock(&sbi->alloc_mutex);
return 0;
+
+kaboom:
+ printk(KERN_CRIT "hfsplus: unable to mark blocks free: error %ld\n",
+ PTR_ERR(page));
+ mutex_unlock(&sbi->alloc_mutex);
+
+ return -EIO;
}
diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c
index 21023d9f8ff3..685d07d0ed18 100644
--- a/fs/hfsplus/btree.c
+++ b/fs/hfsplus/btree.c
@@ -159,7 +159,7 @@ void hfs_btree_close(struct hfs_btree *tree)
kfree(tree);
}
-void hfs_btree_write(struct hfs_btree *tree)
+int hfs_btree_write(struct hfs_btree *tree)
{
struct hfs_btree_header_rec *head;
struct hfs_bnode *node;
@@ -168,7 +168,7 @@ void hfs_btree_write(struct hfs_btree *tree)
node = hfs_bnode_find(tree, 0);
if (IS_ERR(node))
/* panic? */
- return;
+ return -EIO;
/* Load the header */
page = node->page[0];
head = (struct hfs_btree_header_rec *)(kmap(page) +
@@ -186,6 +186,7 @@ void hfs_btree_write(struct hfs_btree *tree)
kunmap(page);
set_page_dirty(page);
hfs_bnode_put(node);
+ return 0;
}
static struct hfs_bnode *hfs_bmap_new_bmap(struct hfs_bnode *prev, u32 idx)
diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index 5849e3ef35cc..eba76eab6d62 100644
--- a/fs/hfsplus/extents.c
+++ b/fs/hfsplus/extents.c
@@ -329,6 +329,7 @@ static int hfsplus_free_extents(struct super_block *sb,
{
u32 count, start;
int i;
+ int err = 0;
hfsplus_dump_extent(extent);
for (i = 0; i < 8; extent++, i++) {
@@ -345,18 +346,33 @@ found:
for (;;) {
start = be32_to_cpu(extent->start_block);
if (count <= block_nr) {
- hfsplus_block_free(sb, start, count);
+ err = hfsplus_block_free(sb, start, count);
+ if (err) {
+ printk(KERN_ERR "hfs: can't free extent\n");
+ dprint(DBG_EXTENT, " start: %u count: %u\n",
+ start, count);
+ }
extent->block_count = 0;
extent->start_block = 0;
block_nr -= count;
} else {
count -= block_nr;
- hfsplus_block_free(sb, start + count, block_nr);
+ err = hfsplus_block_free(sb, start + count, block_nr);
+ if (err) {
+ printk(KERN_ERR "hfs: can't free extent\n");
+ dprint(DBG_EXTENT, " start: %u count: %u\n",
+ start, count);
+ }
extent->block_count = cpu_to_be32(count);
block_nr = 0;
}
- if (!block_nr || !i)
- return 0;
+ if (!block_nr || !i) {
+ /*
+ * Try to free all extents and
+ * return only last error
+ */
+ return err;
+ }
i--;
extent--;
count = be32_to_cpu(extent->block_count);
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index c571de224b15..a6da86b1b4c1 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -335,7 +335,7 @@ int hfsplus_block_free(struct super_block *, u32, u32);
/* btree.c */
struct hfs_btree *hfs_btree_open(struct super_block *, u32);
void hfs_btree_close(struct hfs_btree *);
-void hfs_btree_write(struct hfs_btree *);
+int hfs_btree_write(struct hfs_btree *);
struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
void hfs_bmap_free(struct hfs_bnode *);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 2172aa5976f5..799b336b59f9 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -28,6 +28,16 @@ static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
return block_write_full_page(page, hfsplus_get_block, wbc);
}
+static void hfsplus_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ hfsplus_file_truncate(inode);
+ }
+}
+
static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -38,11 +48,8 @@ static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfsplus_get_block,
&HFSPLUS_I(mapping->host)->phys_size);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ hfsplus_write_failed(mapping, pos + len);
return ret;
}
@@ -116,6 +123,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
ssize_t ret;
@@ -131,7 +139,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
loff_t end = offset + iov_length(iov, nr_segs);
if (end > isize)
- vmtruncate(inode, isize);
+ hfsplus_write_failed(mapping, end);
}
return ret;
@@ -300,10 +308,8 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
inode_dio_wait(inode);
-
- error = vmtruncate(inode, attr->ia_size);
- if (error)
- return error;
+ truncate_setsize(inode, attr->ia_size);
+ hfsplus_file_truncate(inode);
}
setattr_copy(inode, attr);
@@ -358,7 +364,6 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
static const struct inode_operations hfsplus_file_inode_operations = {
.lookup = hfsplus_file_lookup,
- .truncate = hfsplus_file_truncate,
.setattr = hfsplus_setattr,
.setxattr = hfsplus_setxattr,
.getxattr = hfsplus_getxattr,
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 811a84d2d964..796198d26553 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -127,8 +127,14 @@ static int hfsplus_system_write_inode(struct inode *inode)
hfsplus_mark_mdb_dirty(inode->i_sb);
}
hfsplus_inode_write_fork(inode, fork);
- if (tree)
- hfs_btree_write(tree);
+ if (tree) {
+ int err = hfs_btree_write(tree);
+ if (err) {
+ printk(KERN_ERR "hfs: b-tree write err: %d, ino %lu\n",
+ err, inode->i_ino);
+ return err;
+ }
+ }
return 0;
}
@@ -226,6 +232,7 @@ out:
static void delayed_sync_fs(struct work_struct *work)
{
+ int err;
struct hfsplus_sb_info *sbi;
sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
@@ -234,7 +241,9 @@ static void delayed_sync_fs(struct work_struct *work)
sbi->work_queued = 0;
spin_unlock(&sbi->work_lock);
- hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
+ err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
+ if (err)
+ printk(KERN_ERR "hfs: delayed sync fs err %d\n", err);
}
void hfsplus_mark_mdb_dirty(struct super_block *sb)
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index 89d2a5803ae3..fbfe2df5624b 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -50,7 +50,7 @@ static secno hpfs_bmap(struct inode *inode, unsigned file_secno)
return disk_secno;
}
-static void hpfs_truncate(struct inode *i)
+void hpfs_truncate(struct inode *i)
{
if (IS_IMMUTABLE(i)) return /*-EPERM*/;
hpfs_lock_assert(i->i_sb);
@@ -105,6 +105,16 @@ static int hpfs_readpage(struct file *file, struct page *page)
return block_read_full_page(page,hpfs_get_block);
}
+static void hpfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ hpfs_truncate(inode);
+ }
+}
+
static int hpfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -115,11 +125,8 @@ static int hpfs_write_begin(struct file *file, struct address_space *mapping,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hpfs_get_block,
&hpfs_i(mapping->host)->mmu_private);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ hpfs_write_failed(mapping, pos + len);
return ret;
}
@@ -166,6 +173,5 @@ const struct file_operations hpfs_file_ops =
const struct inode_operations hpfs_file_iops =
{
- .truncate = hpfs_truncate,
.setattr = hpfs_setattr,
};
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index 7102aaecc244..b7ae286646b5 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -252,6 +252,7 @@ void hpfs_set_ea(struct inode *, struct fnode *, const char *,
/* file.c */
int hpfs_file_fsync(struct file *, loff_t, loff_t, int);
+void hpfs_truncate(struct inode *);
extern const struct file_operations hpfs_file_ops;
extern const struct inode_operations hpfs_file_iops;
extern const struct address_space_operations hpfs_aops;
diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c
index 405ab77db39c..9edeeb0ea97e 100644
--- a/fs/hpfs/inode.c
+++ b/fs/hpfs/inode.c
@@ -277,9 +277,12 @@ int hpfs_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
+ error = inode_newsize_ok(inode, attr->ia_size);
if (error)
goto out_unlock;
+
+ truncate_setsize(inode, attr->ia_size);
+ hpfs_truncate(inode);
}
setattr_copy(inode, attr);
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 78f21f8dc2ec..43b315f2002b 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -710,7 +710,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
struct vfsmount *proc_mnt;
int err = -ENOENT;
- proc_mnt = mntget(current->nsproxy->pid_ns->proc_mnt);
+ proc_mnt = mntget(task_active_pid_ns(current)->proc_mnt);
if (IS_ERR(proc_mnt))
goto out;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index c98d0665fa5c..78bde32ea951 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -151,8 +151,8 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- unsigned long start_addr;
struct hstate *h = hstate_file(file);
+ struct vm_unmapped_area_info info;
if (len & ~huge_page_mask(h))
return -EINVAL;
@@ -173,39 +173,13 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
return addr;
}
- if (len > mm->cached_hole_size)
- start_addr = mm->free_area_cache;
- else {
- start_addr = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = 0;
- }
-
-full_search:
- addr = ALIGN(start_addr, huge_page_size(h));
-
- for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
- /* At this point: (!vma || addr < vma->vm_end). */
- if (TASK_SIZE - len < addr) {
- /*
- * Start a new search - just in case we missed
- * some holes.
- */
- if (start_addr != TASK_UNMAPPED_BASE) {
- start_addr = TASK_UNMAPPED_BASE;
- mm->cached_hole_size = 0;
- goto full_search;
- }
- return -ENOMEM;
- }
-
- if (!vma || addr + len <= vma->vm_start) {
- mm->free_area_cache = addr + len;
- return addr;
- }
- if (addr + mm->cached_hole_size < vma->vm_start)
- mm->cached_hole_size = vma->vm_start - addr;
- addr = ALIGN(vma->vm_end, huge_page_size(h));
- }
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = TASK_UNMAPPED_BASE;
+ info.high_limit = TASK_SIZE;
+ info.align_mask = PAGE_MASK & ~huge_page_mask(h);
+ info.align_offset = 0;
+ return vm_unmapped_area(&info);
}
#endif
@@ -608,11 +582,11 @@ static int hugetlbfs_migrate_page(struct address_space *mapping,
int rc;
rc = migrate_huge_page_move_mapping(mapping, newpage, page);
- if (rc)
+ if (rc != MIGRATEPAGE_SUCCESS)
return rc;
migrate_page_copy(newpage, page);
- return 0;
+ return MIGRATEPAGE_SUCCESS;
}
static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
@@ -923,7 +897,7 @@ static struct file_system_type hugetlbfs_fs_type = {
.kill_sb = kill_litter_super,
};
-static struct vfsmount *hugetlbfs_vfsmount;
+static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
static int can_do_hugetlb_shm(void)
{
@@ -932,9 +906,22 @@ static int can_do_hugetlb_shm(void)
return capable(CAP_IPC_LOCK) || in_group_p(shm_group);
}
+static int get_hstate_idx(int page_size_log)
+{
+ struct hstate *h;
+
+ if (!page_size_log)
+ return default_hstate_idx;
+ h = size_to_hstate(1 << page_size_log);
+ if (!h)
+ return -1;
+ return h - hstates;
+}
+
struct file *hugetlb_file_setup(const char *name, unsigned long addr,
size_t size, vm_flags_t acctflag,
- struct user_struct **user, int creat_flags)
+ struct user_struct **user,
+ int creat_flags, int page_size_log)
{
int error = -ENOMEM;
struct file *file;
@@ -944,9 +931,14 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr,
struct qstr quick_string;
struct hstate *hstate;
unsigned long num_pages;
+ int hstate_idx;
+
+ hstate_idx = get_hstate_idx(page_size_log);
+ if (hstate_idx < 0)
+ return ERR_PTR(-ENODEV);
*user = NULL;
- if (!hugetlbfs_vfsmount)
+ if (!hugetlbfs_vfsmount[hstate_idx])
return ERR_PTR(-ENOENT);
if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
@@ -963,7 +955,7 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr,
}
}
- root = hugetlbfs_vfsmount->mnt_root;
+ root = hugetlbfs_vfsmount[hstate_idx]->mnt_root;
quick_string.name = name;
quick_string.len = strlen(quick_string.name);
quick_string.hash = 0;
@@ -971,7 +963,7 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr,
if (!path.dentry)
goto out_shm_unlock;
- path.mnt = mntget(hugetlbfs_vfsmount);
+ path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]);
error = -ENOSPC;
inode = hugetlbfs_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0);
if (!inode)
@@ -1011,8 +1003,9 @@ out_shm_unlock:
static int __init init_hugetlbfs_fs(void)
{
+ struct hstate *h;
int error;
- struct vfsmount *vfsmount;
+ int i;
error = bdi_init(&hugetlbfs_backing_dev_info);
if (error)
@@ -1029,14 +1022,26 @@ static int __init init_hugetlbfs_fs(void)
if (error)
goto out;
- vfsmount = kern_mount(&hugetlbfs_fs_type);
+ i = 0;
+ for_each_hstate(h) {
+ char buf[50];
+ unsigned ps_kb = 1U << (h->order + PAGE_SHIFT - 10);
- if (!IS_ERR(vfsmount)) {
- hugetlbfs_vfsmount = vfsmount;
- return 0;
- }
+ snprintf(buf, sizeof(buf), "pagesize=%uK", ps_kb);
+ hugetlbfs_vfsmount[i] = kern_mount_data(&hugetlbfs_fs_type,
+ buf);
- error = PTR_ERR(vfsmount);
+ if (IS_ERR(hugetlbfs_vfsmount[i])) {
+ pr_err("hugetlb: Cannot mount internal hugetlbfs for "
+ "page size %uK", ps_kb);
+ error = PTR_ERR(hugetlbfs_vfsmount[i]);
+ hugetlbfs_vfsmount[i] = NULL;
+ }
+ i++;
+ }
+ /* Non default hstates are optional */
+ if (!IS_ERR_OR_NULL(hugetlbfs_vfsmount[default_hstate_idx]))
+ return 0;
out:
kmem_cache_destroy(hugetlbfs_inode_cachep);
@@ -1047,13 +1052,19 @@ static int __init init_hugetlbfs_fs(void)
static void __exit exit_hugetlbfs_fs(void)
{
+ struct hstate *h;
+ int i;
+
+
/*
* Make sure all delayed rcu free inodes are flushed before we
* destroy cache.
*/
rcu_barrier();
kmem_cache_destroy(hugetlbfs_inode_cachep);
- kern_unmount(hugetlbfs_vfsmount);
+ i = 0;
+ for_each_hstate(h)
+ kern_unmount(hugetlbfs_vfsmount[i++]);
unregister_filesystem(&hugetlbfs_fs_type);
bdi_destroy(&hugetlbfs_backing_dev_info);
}
diff --git a/fs/inode.c b/fs/inode.c
index b03c71957246..14084b72b259 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -165,7 +165,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
mapping->host = inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
- mapping->assoc_mapping = NULL;
+ mapping->private_data = NULL;
mapping->backing_dev_info = &default_backing_dev_info;
mapping->writeback_index = 0;
@@ -408,6 +408,19 @@ static void inode_lru_list_add(struct inode *inode)
spin_unlock(&inode->i_sb->s_inode_lru_lock);
}
+/*
+ * Add inode to LRU if needed (inode is unused and clean).
+ *
+ * Needs inode->i_lock held.
+ */
+void inode_add_lru(struct inode *inode)
+{
+ if (!(inode->i_state & (I_DIRTY | I_SYNC | I_FREEING | I_WILL_FREE)) &&
+ !atomic_read(&inode->i_count) && inode->i_sb->s_flags & MS_ACTIVE)
+ inode_lru_list_add(inode);
+}
+
+
static void inode_lru_list_del(struct inode *inode)
{
spin_lock(&inode->i_sb->s_inode_lru_lock);
@@ -1390,8 +1403,7 @@ static void iput_final(struct inode *inode)
if (!drop && (sb->s_flags & MS_ACTIVE)) {
inode->i_state |= I_REFERENCED;
- if (!(inode->i_state & (I_DIRTY|I_SYNC)))
- inode_lru_list_add(inode);
+ inode_add_lru(inode);
spin_unlock(&inode->i_lock);
return;
}
diff --git a/fs/internal.h b/fs/internal.h
index 916b7cbf3e3e..2f6af7f645eb 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -110,6 +110,7 @@ extern int open_check_o_direct(struct file *f);
* inode.c
*/
extern spinlock_t inode_sb_list_lock;
+extern void inode_add_lru(struct inode *inode);
/*
* fs-writeback.c
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index a2862339323b..81cc7eaff863 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -446,7 +446,8 @@ int __log_start_commit(journal_t *journal, tid_t target)
* currently running transaction (if it exists). Otherwise,
* the target tid must be an old one.
*/
- if (journal->j_running_transaction &&
+ if (journal->j_commit_request != target &&
+ journal->j_running_transaction &&
journal->j_running_transaction->t_tid == target) {
/*
* We want a new commit: OK, mark the request and wakeup the
diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index 8b472c8bbf7a..071d6905f0dd 100644
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -1961,7 +1961,9 @@ retry:
spin_unlock(&journal->j_list_lock);
jbd_unlock_bh_state(bh);
spin_unlock(&journal->j_state_lock);
+ unlock_buffer(bh);
log_wait_commit(journal, tid);
+ lock_buffer(bh);
goto retry;
}
/*
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 484b8d1c6cb6..dbf41f9452db 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -60,7 +60,6 @@ EXPORT_SYMBOL(jbd2_journal_get_create_access);
EXPORT_SYMBOL(jbd2_journal_get_undo_access);
EXPORT_SYMBOL(jbd2_journal_set_triggers);
EXPORT_SYMBOL(jbd2_journal_dirty_metadata);
-EXPORT_SYMBOL(jbd2_journal_release_buffer);
EXPORT_SYMBOL(jbd2_journal_forget);
#if 0
EXPORT_SYMBOL(journal_sync_buffer);
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index d8da40e99d84..df9f29760efa 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -209,7 +209,8 @@ repeat:
if (!new_transaction)
goto alloc_transaction;
write_lock(&journal->j_state_lock);
- if (!journal->j_running_transaction) {
+ if (!journal->j_running_transaction &&
+ !journal->j_barrier_count) {
jbd2_get_transaction(journal, new_transaction);
new_transaction = NULL;
}
@@ -1207,17 +1208,6 @@ out:
return ret;
}
-/*
- * jbd2_journal_release_buffer: undo a get_write_access without any buffer
- * updates, if the update decided in the end that it didn't need access.
- *
- */
-void
-jbd2_journal_release_buffer(handle_t *handle, struct buffer_head *bh)
-{
- BUFFER_TRACE(bh, "entry");
-}
-
/**
* void jbd2_journal_forget() - bforget() for potentially-journaled buffers.
* @handle: transaction handle
@@ -1850,7 +1840,6 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh,
BUFFER_TRACE(bh, "entry");
-retry:
/*
* It is safe to proceed here without the j_list_lock because the
* buffers cannot be stolen by try_to_free_buffers as long as we are
@@ -1945,14 +1934,11 @@ retry:
* for commit and try again.
*/
if (partial_page) {
- tid_t tid = journal->j_committing_transaction->t_tid;
-
jbd2_journal_put_journal_head(jh);
spin_unlock(&journal->j_list_lock);
jbd_unlock_bh_state(bh);
write_unlock(&journal->j_state_lock);
- jbd2_log_wait_commit(journal, tid);
- goto retry;
+ return -EBUSY;
}
/*
* OK, buffer won't be reachable after truncate. We just set
@@ -2013,21 +1999,23 @@ zap_buffer_unlocked:
* @page: page to flush
* @offset: length of page to invalidate.
*
- * Reap page buffers containing data after offset in page.
- *
+ * Reap page buffers containing data after offset in page. Can return -EBUSY
+ * if buffers are part of the committing transaction and the page is straddling
+ * i_size. Caller then has to wait for current commit and try again.
*/
-void jbd2_journal_invalidatepage(journal_t *journal,
- struct page *page,
- unsigned long offset)
+int jbd2_journal_invalidatepage(journal_t *journal,
+ struct page *page,
+ unsigned long offset)
{
struct buffer_head *head, *bh, *next;
unsigned int curr_off = 0;
int may_free = 1;
+ int ret = 0;
if (!PageLocked(page))
BUG();
if (!page_has_buffers(page))
- return;
+ return 0;
/* We will potentially be playing with lists other than just the
* data lists (especially for journaled data mode), so be
@@ -2041,9 +2029,11 @@ void jbd2_journal_invalidatepage(journal_t *journal,
if (offset <= curr_off) {
/* This block is wholly outside the truncation point */
lock_buffer(bh);
- may_free &= journal_unmap_buffer(journal, bh,
- offset > 0);
+ ret = journal_unmap_buffer(journal, bh, offset > 0);
unlock_buffer(bh);
+ if (ret < 0)
+ return ret;
+ may_free &= ret;
}
curr_off = next_off;
bh = next;
@@ -2054,6 +2044,7 @@ void jbd2_journal_invalidatepage(journal_t *journal,
if (may_free && try_to_free_buffers(page))
J_ASSERT(!page_has_buffers(page));
}
+ return 0;
}
/*
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 60ef3fb707ff..1506673c087e 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -138,33 +138,39 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
struct page *pg;
struct inode *inode = mapping->host;
struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
+ struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
+ struct jffs2_raw_inode ri;
+ uint32_t alloc_len = 0;
pgoff_t index = pos >> PAGE_CACHE_SHIFT;
uint32_t pageofs = index << PAGE_CACHE_SHIFT;
int ret = 0;
+ jffs2_dbg(1, "%s()\n", __func__);
+
+ if (pageofs > inode->i_size) {
+ ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len,
+ ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
+ if (ret)
+ return ret;
+ }
+
+ mutex_lock(&f->sem);
pg = grab_cache_page_write_begin(mapping, index, flags);
- if (!pg)
+ if (!pg) {
+ if (alloc_len)
+ jffs2_complete_reservation(c);
+ mutex_unlock(&f->sem);
return -ENOMEM;
+ }
*pagep = pg;
- jffs2_dbg(1, "%s()\n", __func__);
-
- if (pageofs > inode->i_size) {
+ if (alloc_len) {
/* Make new hole frag from old EOF to new page */
- struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
- struct jffs2_raw_inode ri;
struct jffs2_full_dnode *fn;
- uint32_t alloc_len;
jffs2_dbg(1, "Writing new hole frag 0x%x-0x%x between current EOF and new page\n",
(unsigned int)inode->i_size, pageofs);
- ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len,
- ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
- if (ret)
- goto out_page;
-
- mutex_lock(&f->sem);
memset(&ri, 0, sizeof(ri));
ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -191,7 +197,6 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
if (IS_ERR(fn)) {
ret = PTR_ERR(fn);
jffs2_complete_reservation(c);
- mutex_unlock(&f->sem);
goto out_page;
}
ret = jffs2_add_full_dnode_to_inode(c, f, fn);
@@ -206,12 +211,10 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
jffs2_mark_node_obsolete(c, fn->raw);
jffs2_free_full_dnode(fn);
jffs2_complete_reservation(c);
- mutex_unlock(&f->sem);
goto out_page;
}
jffs2_complete_reservation(c);
inode->i_size = pageofs;
- mutex_unlock(&f->sem);
}
/*
@@ -220,18 +223,18 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
* case of a short-copy.
*/
if (!PageUptodate(pg)) {
- mutex_lock(&f->sem);
ret = jffs2_do_readpage_nolock(inode, pg);
- mutex_unlock(&f->sem);
if (ret)
goto out_page;
}
+ mutex_unlock(&f->sem);
jffs2_dbg(1, "end write_begin(). pg->flags %lx\n", pg->flags);
return ret;
out_page:
unlock_page(pg);
page_cache_release(pg);
+ mutex_unlock(&f->sem);
return ret;
}
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index 0c96eb52c797..03310721712f 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -417,14 +417,16 @@ static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
spin_unlock(&c->erase_completion_lock);
ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
- if (ret)
- return ret;
+
/* Just lock it again and continue. Nothing much can change because
we hold c->alloc_sem anyway. In fact, it's not entirely clear why
we hold c->erase_completion_lock in the majority of this function...
but that's a question for another (more caffeine-rich) day. */
spin_lock(&c->erase_completion_lock);
+ if (ret)
+ return ret;
+
waste = jeb->free_size;
jffs2_link_node_ref(c, jeb,
(jeb->offset + c->sector_size - waste) | REF_OBSOLETE,
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 9d3afd157f99..dd7442c58358 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -119,9 +119,12 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
iattr->ia_size != i_size_read(inode)) {
inode_dio_wait(inode);
- rc = vmtruncate(inode, iattr->ia_size);
+ rc = inode_newsize_ok(inode, iattr->ia_size);
if (rc)
return rc;
+
+ truncate_setsize(inode, iattr->ia_size);
+ jfs_truncate(inode);
}
setattr_copy(inode, iattr);
@@ -133,7 +136,6 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
}
const struct inode_operations jfs_file_inode_operations = {
- .truncate = jfs_truncate,
.setxattr = jfs_setxattr,
.getxattr = jfs_getxattr,
.listxattr = jfs_listxattr,
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 4692bf3ca8cb..b7dc47ba675e 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -300,6 +300,16 @@ static int jfs_readpages(struct file *file, struct address_space *mapping,
return mpage_readpages(mapping, pages, nr_pages, jfs_get_block);
}
+static void jfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ jfs_truncate(inode);
+ }
+}
+
static int jfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -308,11 +318,8 @@ static int jfs_write_begin(struct file *file, struct address_space *mapping,
ret = nobh_write_begin(mapping, pos, len, flags, pagep, fsdata,
jfs_get_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ jfs_write_failed(mapping, pos + len);
return ret;
}
@@ -326,6 +333,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
@@ -341,7 +349,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
loff_t end = offset + iov_length(iov, nr_segs);
if (end > isize)
- vmtruncate(inode, isize);
+ jfs_write_failed(mapping, end);
}
return ret;
diff --git a/fs/libfs.c b/fs/libfs.c
index 7cc37ca19cd8..916da8c4158b 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -81,11 +81,11 @@ int dcache_dir_close(struct inode *inode, struct file *file)
return 0;
}
-loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
+loff_t dcache_dir_lseek(struct file *file, loff_t offset, int whence)
{
struct dentry *dentry = file->f_path.dentry;
mutex_lock(&dentry->d_inode->i_mutex);
- switch (origin) {
+ switch (whence) {
case 1:
offset += file->f_pos;
case 0:
@@ -369,8 +369,6 @@ int simple_setattr(struct dentry *dentry, struct iattr *iattr)
struct inode *inode = dentry->d_inode;
int error;
- WARN_ON_ONCE(inode->i_op->truncate);
-
error = inode_change_ok(inode, iattr);
if (error)
return error;
diff --git a/fs/lockd/clnt4xdr.c b/fs/lockd/clnt4xdr.c
index 13ad1539fbf2..00ec0b9c94d1 100644
--- a/fs/lockd/clnt4xdr.c
+++ b/fs/lockd/clnt4xdr.c
@@ -64,10 +64,6 @@ static void nlm4_compute_offsets(const struct nlm_lock *lock,
{
const struct file_lock *fl = &lock->fl;
- BUG_ON(fl->fl_start > NLM4_OFFSET_MAX);
- BUG_ON(fl->fl_end > NLM4_OFFSET_MAX &&
- fl->fl_end != OFFSET_MAX);
-
*l_offset = loff_t_to_s64(fl->fl_start);
if (fl->fl_end == OFFSET_MAX)
*l_len = 0;
@@ -122,7 +118,6 @@ static void encode_netobj(struct xdr_stream *xdr,
{
__be32 *p;
- BUG_ON(length > XDR_MAX_NETOBJ);
p = xdr_reserve_space(xdr, 4 + length);
xdr_encode_opaque(p, data, length);
}
@@ -156,7 +151,6 @@ out_overflow:
static void encode_cookie(struct xdr_stream *xdr,
const struct nlm_cookie *cookie)
{
- BUG_ON(cookie->len > NLM_MAXCOOKIELEN);
encode_netobj(xdr, (u8 *)&cookie->data, cookie->len);
}
@@ -198,7 +192,6 @@ out_overflow:
*/
static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
- BUG_ON(fh->size > NFS3_FHSIZE);
encode_netobj(xdr, (u8 *)&fh->data, fh->size);
}
@@ -336,7 +329,6 @@ static void encode_caller_name(struct xdr_stream *xdr, const char *name)
u32 length = strlen(name);
__be32 *p;
- BUG_ON(length > NLM_MAXSTRLEN);
p = xdr_reserve_space(xdr, 4 + length);
xdr_encode_opaque(p, name, length);
}
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 05d29124c6ab..54f9e6ce0430 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -141,7 +141,7 @@ static void nlmclnt_setlockargs(struct nlm_rqst *req, struct file_lock *fl)
static void nlmclnt_release_lockargs(struct nlm_rqst *req)
{
- BUG_ON(req->a_args.lock.fl.fl_ops != NULL);
+ WARN_ON_ONCE(req->a_args.lock.fl.fl_ops != NULL);
}
/**
@@ -465,7 +465,6 @@ static const struct file_lock_operations nlmclnt_lock_ops = {
static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *host)
{
- BUG_ON(fl->fl_ops != NULL);
fl->fl_u.nfs_fl.state = 0;
fl->fl_u.nfs_fl.owner = nlm_find_lockowner(host, fl->fl_owner);
INIT_LIST_HEAD(&fl->fl_u.nfs_fl.list);
diff --git a/fs/lockd/clntxdr.c b/fs/lockd/clntxdr.c
index 982d2676e1f8..9a55797a1cd4 100644
--- a/fs/lockd/clntxdr.c
+++ b/fs/lockd/clntxdr.c
@@ -60,10 +60,6 @@ static void nlm_compute_offsets(const struct nlm_lock *lock,
{
const struct file_lock *fl = &lock->fl;
- BUG_ON(fl->fl_start > NLM_OFFSET_MAX);
- BUG_ON(fl->fl_end > NLM_OFFSET_MAX &&
- fl->fl_end != OFFSET_MAX);
-
*l_offset = loff_t_to_s32(fl->fl_start);
if (fl->fl_end == OFFSET_MAX)
*l_len = 0;
@@ -119,7 +115,6 @@ static void encode_netobj(struct xdr_stream *xdr,
{
__be32 *p;
- BUG_ON(length > XDR_MAX_NETOBJ);
p = xdr_reserve_space(xdr, 4 + length);
xdr_encode_opaque(p, data, length);
}
@@ -153,7 +148,6 @@ out_overflow:
static void encode_cookie(struct xdr_stream *xdr,
const struct nlm_cookie *cookie)
{
- BUG_ON(cookie->len > NLM_MAXCOOKIELEN);
encode_netobj(xdr, (u8 *)&cookie->data, cookie->len);
}
@@ -195,7 +189,6 @@ out_overflow:
*/
static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
- BUG_ON(fh->size != NFS2_FHSIZE);
encode_netobj(xdr, (u8 *)&fh->data, NFS2_FHSIZE);
}
@@ -330,7 +323,6 @@ static void encode_caller_name(struct xdr_stream *xdr, const char *name)
u32 length = strlen(name);
__be32 *p;
- BUG_ON(length > NLM_MAXSTRLEN);
p = xdr_reserve_space(xdr, 4 + length);
xdr_encode_opaque(p, name, length);
}
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index f9b22e58f78f..0e17090c310f 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -177,9 +177,6 @@ static void nlm_destroy_host_locked(struct nlm_host *host)
dprintk("lockd: destroy host %s\n", host->h_name);
- BUG_ON(!list_empty(&host->h_lockowners));
- BUG_ON(atomic_read(&host->h_count));
-
hlist_del_init(&host->h_hash);
nsm_unmonitor(host);
@@ -289,13 +286,12 @@ void nlmclnt_release_host(struct nlm_host *host)
dprintk("lockd: release client host %s\n", host->h_name);
- BUG_ON(atomic_read(&host->h_count) < 0);
- BUG_ON(host->h_server);
+ WARN_ON_ONCE(host->h_server);
if (atomic_dec_and_test(&host->h_count)) {
- BUG_ON(!list_empty(&host->h_lockowners));
- BUG_ON(!list_empty(&host->h_granted));
- BUG_ON(!list_empty(&host->h_reclaim));
+ WARN_ON_ONCE(!list_empty(&host->h_lockowners));
+ WARN_ON_ONCE(!list_empty(&host->h_granted));
+ WARN_ON_ONCE(!list_empty(&host->h_reclaim));
mutex_lock(&nlm_host_mutex);
nlm_destroy_host_locked(host);
@@ -412,8 +408,7 @@ void nlmsvc_release_host(struct nlm_host *host)
dprintk("lockd: release server host %s\n", host->h_name);
- BUG_ON(atomic_read(&host->h_count) < 0);
- BUG_ON(!host->h_server);
+ WARN_ON_ONCE(!host->h_server);
atomic_dec(&host->h_count);
}
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 3d7e09bcc0e9..3c2cfc683631 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -154,8 +154,6 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
.rpc_resp = res,
};
- BUG_ON(clnt == NULL);
-
memset(res, 0, sizeof(*res));
msg.rpc_proc = &clnt->cl_procinfo[proc];
@@ -466,7 +464,6 @@ static void encode_nsm_string(struct xdr_stream *xdr, const char *string)
const u32 len = strlen(string);
__be32 *p;
- BUG_ON(len > SM_MAXSTRLEN);
p = xdr_reserve_space(xdr, 4 + len);
xdr_encode_opaque(p, string, len);
}
diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index e1a3b6bf6324..9a59cbade2fb 100644
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -1887,9 +1887,15 @@ int logfs_truncate(struct inode *inode, u64 target)
logfs_put_wblocks(sb, NULL, 1);
}
- if (!err)
- err = vmtruncate(inode, target);
+ if (!err) {
+ err = inode_newsize_ok(inode, target);
+ if (err)
+ goto out;
+
+ truncate_setsize(inode, target);
+ }
+ out:
/* I don't trust error recovery yet. */
WARN_ON(err);
return err;
diff --git a/fs/minix/file.c b/fs/minix/file.c
index 4493ce695ab8..adc6f5494231 100644
--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -34,9 +34,12 @@ static int minix_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
+ error = inode_newsize_ok(inode, attr->ia_size);
if (error)
return error;
+
+ truncate_setsize(inode, attr->ia_size);
+ minix_truncate(inode);
}
setattr_copy(inode, attr);
@@ -45,7 +48,6 @@ static int minix_setattr(struct dentry *dentry, struct iattr *attr)
}
const struct inode_operations minix_file_inode_operations = {
- .truncate = minix_truncate,
.setattr = minix_setattr,
.getattr = minix_getattr,
};
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 4fc5f8ab1c44..99541cceb584 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -395,6 +395,16 @@ int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len)
return __block_write_begin(page, pos, len, minix_get_block);
}
+static void minix_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ minix_truncate(inode);
+ }
+}
+
static int minix_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -403,11 +413,8 @@ static int minix_write_begin(struct file *file, struct address_space *mapping,
ret = block_write_begin(mapping, pos, len, flags, pagep,
minix_get_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ minix_write_failed(mapping, pos + len);
return ret;
}
diff --git a/fs/mount.h b/fs/mount.h
index 4f291f9de641..cd5007980400 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -4,8 +4,11 @@
struct mnt_namespace {
atomic_t count;
+ unsigned int proc_inum;
struct mount * root;
struct list_head list;
+ struct user_namespace *user_ns;
+ u64 seq; /* Sequence number to prevent loops */
wait_queue_head_t poll;
int event;
};
diff --git a/fs/namei.c b/fs/namei.c
index 937f9d50c84b..43a97ee1d4c8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1275,9 +1275,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
*need_lookup = false;
dentry = d_lookup(dir, name);
if (dentry) {
- if (d_need_lookup(dentry)) {
- *need_lookup = true;
- } else if (dentry->d_flags & DCACHE_OP_REVALIDATE) {
+ if (dentry->d_flags & DCACHE_OP_REVALIDATE) {
error = d_revalidate(dentry, flags);
if (unlikely(error <= 0)) {
if (error < 0) {
@@ -1383,8 +1381,6 @@ static int lookup_fast(struct nameidata *nd, struct qstr *name,
return -ECHILD;
nd->seq = seq;
- if (unlikely(d_need_lookup(dentry)))
- goto unlazy;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
status = d_revalidate(dentry, nd->flags);
if (unlikely(status <= 0)) {
@@ -1410,11 +1406,6 @@ unlazy:
if (unlikely(!dentry))
goto need_lookup;
- if (unlikely(d_need_lookup(dentry))) {
- dput(dentry);
- goto need_lookup;
- }
-
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE) && need_reval)
status = d_revalidate(dentry, nd->flags);
if (unlikely(status <= 0)) {
@@ -1859,7 +1850,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
if (flags & LOOKUP_ROOT) {
struct inode *inode = nd->root.dentry->d_inode;
if (*name) {
- if (!inode->i_op->lookup)
+ if (!can_lookup(inode))
return -ENOTDIR;
retval = inode_permission(inode, MAY_EXEC);
if (retval)
@@ -1903,6 +1894,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
get_fs_pwd(current->fs, &nd->path);
}
} else {
+ /* Caller must check execute permissions on the starting path component */
struct fd f = fdget_raw(dfd);
struct dentry *dentry;
@@ -1912,16 +1904,10 @@ static int path_init(int dfd, const char *name, unsigned int flags,
dentry = f.file->f_path.dentry;
if (*name) {
- if (!S_ISDIR(dentry->d_inode->i_mode)) {
+ if (!can_lookup(dentry->d_inode)) {
fdput(f);
return -ENOTDIR;
}
-
- retval = inode_permission(dentry->d_inode, MAY_EXEC);
- if (retval) {
- fdput(f);
- return retval;
- }
}
nd->path = f.file->f_path;
@@ -2131,6 +2117,11 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
if (!len)
return ERR_PTR(-EACCES);
+ if (unlikely(name[0] == '.')) {
+ if (len < 2 || (len == 2 && name[1] == '.'))
+ return ERR_PTR(-EACCES);
+ }
+
while (len--) {
c = *(const unsigned char *)name++;
if (c == '/' || c == '\0')
@@ -2184,15 +2175,19 @@ int user_path_at(int dfd, const char __user *name, unsigned flags,
* path-walking is complete.
*/
static struct filename *
-user_path_parent(int dfd, const char __user *path, struct nameidata *nd)
+user_path_parent(int dfd, const char __user *path, struct nameidata *nd,
+ unsigned int flags)
{
struct filename *s = getname(path);
int error;
+ /* only LOOKUP_REVAL is allowed in extra flags */
+ flags &= LOOKUP_REVAL;
+
if (IS_ERR(s))
return s;
- error = filename_lookup(dfd, s, LOOKUP_PARENT, nd);
+ error = filename_lookup(dfd, s, flags | LOOKUP_PARENT, nd);
if (error) {
putname(s);
return ERR_PTR(error);
@@ -3039,12 +3034,22 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
return file;
}
-struct dentry *kern_path_create(int dfd, const char *pathname, struct path *path, int is_dir)
+struct dentry *kern_path_create(int dfd, const char *pathname,
+ struct path *path, unsigned int lookup_flags)
{
struct dentry *dentry = ERR_PTR(-EEXIST);
struct nameidata nd;
int err2;
- int error = do_path_lookup(dfd, pathname, LOOKUP_PARENT, &nd);
+ int error;
+ bool is_dir = (lookup_flags & LOOKUP_DIRECTORY);
+
+ /*
+ * Note that only LOOKUP_REVAL and LOOKUP_DIRECTORY matter here. Any
+ * other flags passed in are ignored!
+ */
+ lookup_flags &= LOOKUP_REVAL;
+
+ error = do_path_lookup(dfd, pathname, LOOKUP_PARENT|lookup_flags, &nd);
if (error)
return ERR_PTR(error);
@@ -3108,13 +3113,14 @@ void done_path_create(struct path *path, struct dentry *dentry)
}
EXPORT_SYMBOL(done_path_create);
-struct dentry *user_path_create(int dfd, const char __user *pathname, struct path *path, int is_dir)
+struct dentry *user_path_create(int dfd, const char __user *pathname,
+ struct path *path, unsigned int lookup_flags)
{
struct filename *tmp = getname(pathname);
struct dentry *res;
if (IS_ERR(tmp))
return ERR_CAST(tmp);
- res = kern_path_create(dfd, tmp->name, path, is_dir);
+ res = kern_path_create(dfd, tmp->name, path, lookup_flags);
putname(tmp);
return res;
}
@@ -3170,12 +3176,13 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode,
struct dentry *dentry;
struct path path;
int error;
+ unsigned int lookup_flags = 0;
error = may_mknod(mode);
if (error)
return error;
-
- dentry = user_path_create(dfd, filename, &path, 0);
+retry:
+ dentry = user_path_create(dfd, filename, &path, lookup_flags);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
@@ -3198,6 +3205,10 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode,
}
out:
done_path_create(&path, dentry);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -3236,8 +3247,10 @@ SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode)
struct dentry *dentry;
struct path path;
int error;
+ unsigned int lookup_flags = LOOKUP_DIRECTORY;
- dentry = user_path_create(dfd, pathname, &path, 1);
+retry:
+ dentry = user_path_create(dfd, pathname, &path, lookup_flags);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
@@ -3247,6 +3260,10 @@ SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode)
if (!error)
error = vfs_mkdir(path.dentry->d_inode, dentry, mode);
done_path_create(&path, dentry);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -3322,8 +3339,9 @@ static long do_rmdir(int dfd, const char __user *pathname)
struct filename *name;
struct dentry *dentry;
struct nameidata nd;
-
- name = user_path_parent(dfd, pathname, &nd);
+ unsigned int lookup_flags = 0;
+retry:
+ name = user_path_parent(dfd, pathname, &nd, lookup_flags);
if (IS_ERR(name))
return PTR_ERR(name);
@@ -3365,6 +3383,10 @@ exit2:
exit1:
path_put(&nd.path);
putname(name);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -3418,8 +3440,9 @@ static long do_unlinkat(int dfd, const char __user *pathname)
struct dentry *dentry;
struct nameidata nd;
struct inode *inode = NULL;
-
- name = user_path_parent(dfd, pathname, &nd);
+ unsigned int lookup_flags = 0;
+retry:
+ name = user_path_parent(dfd, pathname, &nd, lookup_flags);
if (IS_ERR(name))
return PTR_ERR(name);
@@ -3457,6 +3480,11 @@ exit2:
exit1:
path_put(&nd.path);
putname(name);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ inode = NULL;
+ goto retry;
+ }
return error;
slashes:
@@ -3508,12 +3536,13 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
struct filename *from;
struct dentry *dentry;
struct path path;
+ unsigned int lookup_flags = 0;
from = getname(oldname);
if (IS_ERR(from))
return PTR_ERR(from);
-
- dentry = user_path_create(newdfd, newname, &path, 0);
+retry:
+ dentry = user_path_create(newdfd, newname, &path, lookup_flags);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto out_putname;
@@ -3522,6 +3551,10 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
if (!error)
error = vfs_symlink(path.dentry->d_inode, dentry, from->name);
done_path_create(&path, dentry);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out_putname:
putname(from);
return error;
@@ -3608,12 +3641,13 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
if (flags & AT_SYMLINK_FOLLOW)
how |= LOOKUP_FOLLOW;
-
+retry:
error = user_path_at(olddfd, oldname, how, &old_path);
if (error)
return error;
- new_dentry = user_path_create(newdfd, newname, &new_path, 0);
+ new_dentry = user_path_create(newdfd, newname, &new_path,
+ (how & LOOKUP_REVAL));
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry))
goto out;
@@ -3630,6 +3664,10 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
error = vfs_link(old_path.dentry, new_path.dentry->d_inode, new_dentry);
out_dput:
done_path_create(&new_path, new_dentry);
+ if (retry_estale(error, how)) {
+ how |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
path_put(&old_path);
@@ -3802,15 +3840,17 @@ SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname,
struct nameidata oldnd, newnd;
struct filename *from;
struct filename *to;
+ unsigned int lookup_flags = 0;
+ bool should_retry = false;
int error;
-
- from = user_path_parent(olddfd, oldname, &oldnd);
+retry:
+ from = user_path_parent(olddfd, oldname, &oldnd, lookup_flags);
if (IS_ERR(from)) {
error = PTR_ERR(from);
goto exit;
}
- to = user_path_parent(newdfd, newname, &newnd);
+ to = user_path_parent(newdfd, newname, &newnd, lookup_flags);
if (IS_ERR(to)) {
error = PTR_ERR(to);
goto exit1;
@@ -3882,11 +3922,18 @@ exit3:
unlock_rename(new_dir, old_dir);
mnt_drop_write(oldnd.path.mnt);
exit2:
+ if (retry_estale(error, lookup_flags))
+ should_retry = true;
path_put(&newnd.path);
putname(to);
exit1:
path_put(&oldnd.path);
putname(from);
+ if (should_retry) {
+ should_retry = false;
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
exit:
return error;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index 24960626bb6b..55605c552787 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -12,6 +12,7 @@
#include <linux/export.h>
#include <linux/capability.h>
#include <linux/mnt_namespace.h>
+#include <linux/user_namespace.h>
#include <linux/namei.h>
#include <linux/security.h>
#include <linux/idr.h>
@@ -20,6 +21,7 @@
#include <linux/fs_struct.h> /* get_fs_root et.al. */
#include <linux/fsnotify.h> /* fsnotify_vfsmount_delete */
#include <linux/uaccess.h>
+#include <linux/proc_fs.h>
#include "pnode.h"
#include "internal.h"
@@ -311,7 +313,7 @@ int __mnt_want_write(struct vfsmount *m)
* incremented count after it has set MNT_WRITE_HOLD.
*/
smp_mb();
- while (mnt->mnt.mnt_flags & MNT_WRITE_HOLD)
+ while (ACCESS_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD)
cpu_relax();
/*
* After the slowpath clears MNT_WRITE_HOLD, mnt_is_readonly will
@@ -784,7 +786,7 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
if (!mnt)
return ERR_PTR(-ENOMEM);
- if (flag & (CL_SLAVE | CL_PRIVATE))
+ if (flag & (CL_SLAVE | CL_PRIVATE | CL_SHARED_TO_SLAVE))
mnt->mnt_group_id = 0; /* not a peer of original */
else
mnt->mnt_group_id = old->mnt_group_id;
@@ -805,7 +807,8 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
list_add_tail(&mnt->mnt_instance, &sb->s_mounts);
br_write_unlock(&vfsmount_lock);
- if (flag & CL_SLAVE) {
+ if ((flag & CL_SLAVE) ||
+ ((flag & CL_SHARED_TO_SLAVE) && IS_MNT_SHARED(old))) {
list_add(&mnt->mnt_slave, &old->mnt_slave_list);
mnt->mnt_master = old;
CLEAR_MNT_SHARED(mnt);
@@ -1266,7 +1269,7 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags)
goto dput_and_out;
retval = -EPERM;
- if (!capable(CAP_SYS_ADMIN))
+ if (!ns_capable(mnt->mnt_ns->user_ns, CAP_SYS_ADMIN))
goto dput_and_out;
retval = do_umount(mnt, flags);
@@ -1292,7 +1295,7 @@ SYSCALL_DEFINE1(oldumount, char __user *, name)
static int mount_is_safe(struct path *path)
{
- if (capable(CAP_SYS_ADMIN))
+ if (ns_capable(real_mount(path->mnt)->mnt_ns->user_ns, CAP_SYS_ADMIN))
return 0;
return -EPERM;
#ifdef notyet
@@ -1308,6 +1311,26 @@ static int mount_is_safe(struct path *path)
#endif
}
+static bool mnt_ns_loop(struct path *path)
+{
+ /* Could bind mounting the mount namespace inode cause a
+ * mount namespace loop?
+ */
+ struct inode *inode = path->dentry->d_inode;
+ struct proc_inode *ei;
+ struct mnt_namespace *mnt_ns;
+
+ if (!proc_ns_inode(inode))
+ return false;
+
+ ei = PROC_I(inode);
+ if (ei->ns_ops != &mntns_operations)
+ return false;
+
+ mnt_ns = ei->ns;
+ return current->nsproxy->mnt_ns->seq >= mnt_ns->seq;
+}
+
struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
int flag)
{
@@ -1610,7 +1633,7 @@ static int do_change_type(struct path *path, int flag)
int type;
int err = 0;
- if (!capable(CAP_SYS_ADMIN))
+ if (!ns_capable(mnt->mnt_ns->user_ns, CAP_SYS_ADMIN))
return -EPERM;
if (path->dentry != path->mnt->mnt_root)
@@ -1655,6 +1678,10 @@ static int do_loopback(struct path *path, const char *old_name,
if (err)
return err;
+ err = -EINVAL;
+ if (mnt_ns_loop(&old_path))
+ goto out;
+
err = lock_mount(path);
if (err)
goto out;
@@ -1770,7 +1797,7 @@ static int do_move_mount(struct path *path, const char *old_name)
struct mount *p;
struct mount *old;
int err = 0;
- if (!capable(CAP_SYS_ADMIN))
+ if (!ns_capable(real_mount(path->mnt)->mnt_ns->user_ns, CAP_SYS_ADMIN))
return -EPERM;
if (!old_name || !*old_name)
return -EINVAL;
@@ -1857,21 +1884,6 @@ static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype)
return ERR_PTR(err);
}
-static struct vfsmount *
-do_kern_mount(const char *fstype, int flags, const char *name, void *data)
-{
- struct file_system_type *type = get_fs_type(fstype);
- struct vfsmount *mnt;
- if (!type)
- return ERR_PTR(-ENODEV);
- mnt = vfs_kern_mount(type, flags, name, data);
- if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) &&
- !mnt->mnt_sb->s_subtype)
- mnt = fs_set_subtype(mnt, fstype);
- put_filesystem(type);
- return mnt;
-}
-
/*
* add a mount into a namespace's mount tree
*/
@@ -1917,20 +1929,46 @@ unlock:
* create a new mount for userspace and request it to be added into the
* namespace's tree
*/
-static int do_new_mount(struct path *path, const char *type, int flags,
+static int do_new_mount(struct path *path, const char *fstype, int flags,
int mnt_flags, const char *name, void *data)
{
+ struct file_system_type *type;
+ struct user_namespace *user_ns;
struct vfsmount *mnt;
int err;
- if (!type)
+ if (!fstype)
return -EINVAL;
/* we need capabilities... */
- if (!capable(CAP_SYS_ADMIN))
+ user_ns = real_mount(path->mnt)->mnt_ns->user_ns;
+ if (!ns_capable(user_ns, CAP_SYS_ADMIN))
return -EPERM;
- mnt = do_kern_mount(type, flags, name, data);
+ type = get_fs_type(fstype);
+ if (!type)
+ return -ENODEV;
+
+ if (user_ns != &init_user_ns) {
+ if (!(type->fs_flags & FS_USERNS_MOUNT)) {
+ put_filesystem(type);
+ return -EPERM;
+ }
+ /* Only in special cases allow devices from mounts
+ * created outside the initial user namespace.
+ */
+ if (!(type->fs_flags & FS_USERNS_DEV_MOUNT)) {
+ flags |= MS_NODEV;
+ mnt_flags |= MNT_NODEV;
+ }
+ }
+
+ mnt = vfs_kern_mount(type, flags, name, data);
+ if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) &&
+ !mnt->mnt_sb->s_subtype)
+ mnt = fs_set_subtype(mnt, fstype);
+
+ put_filesystem(type);
if (IS_ERR(mnt))
return PTR_ERR(mnt);
@@ -2261,18 +2299,42 @@ dput_out:
return retval;
}
-static struct mnt_namespace *alloc_mnt_ns(void)
+static void free_mnt_ns(struct mnt_namespace *ns)
+{
+ proc_free_inum(ns->proc_inum);
+ put_user_ns(ns->user_ns);
+ kfree(ns);
+}
+
+/*
+ * Assign a sequence number so we can detect when we attempt to bind
+ * mount a reference to an older mount namespace into the current
+ * mount namespace, preventing reference counting loops. A 64bit
+ * number incrementing at 10Ghz will take 12,427 years to wrap which
+ * is effectively never, so we can ignore the possibility.
+ */
+static atomic64_t mnt_ns_seq = ATOMIC64_INIT(1);
+
+static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns)
{
struct mnt_namespace *new_ns;
+ int ret;
new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
if (!new_ns)
return ERR_PTR(-ENOMEM);
+ ret = proc_alloc_inum(&new_ns->proc_inum);
+ if (ret) {
+ kfree(new_ns);
+ return ERR_PTR(ret);
+ }
+ new_ns->seq = atomic64_add_return(1, &mnt_ns_seq);
atomic_set(&new_ns->count, 1);
new_ns->root = NULL;
INIT_LIST_HEAD(&new_ns->list);
init_waitqueue_head(&new_ns->poll);
new_ns->event = 0;
+ new_ns->user_ns = get_user_ns(user_ns);
return new_ns;
}
@@ -2281,24 +2343,28 @@ static struct mnt_namespace *alloc_mnt_ns(void)
* copied from the namespace of the passed in task structure.
*/
static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
- struct fs_struct *fs)
+ struct user_namespace *user_ns, struct fs_struct *fs)
{
struct mnt_namespace *new_ns;
struct vfsmount *rootmnt = NULL, *pwdmnt = NULL;
struct mount *p, *q;
struct mount *old = mnt_ns->root;
struct mount *new;
+ int copy_flags;
- new_ns = alloc_mnt_ns();
+ new_ns = alloc_mnt_ns(user_ns);
if (IS_ERR(new_ns))
return new_ns;
down_write(&namespace_sem);
/* First pass: copy the tree topology */
- new = copy_tree(old, old->mnt.mnt_root, CL_COPY_ALL | CL_EXPIRE);
+ copy_flags = CL_COPY_ALL | CL_EXPIRE;
+ if (user_ns != mnt_ns->user_ns)
+ copy_flags |= CL_SHARED_TO_SLAVE;
+ new = copy_tree(old, old->mnt.mnt_root, copy_flags);
if (IS_ERR(new)) {
up_write(&namespace_sem);
- kfree(new_ns);
+ free_mnt_ns(new_ns);
return ERR_CAST(new);
}
new_ns->root = new;
@@ -2339,7 +2405,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
}
struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
- struct fs_struct *new_fs)
+ struct user_namespace *user_ns, struct fs_struct *new_fs)
{
struct mnt_namespace *new_ns;
@@ -2349,7 +2415,7 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
if (!(flags & CLONE_NEWNS))
return ns;
- new_ns = dup_mnt_ns(ns, new_fs);
+ new_ns = dup_mnt_ns(ns, user_ns, new_fs);
put_mnt_ns(ns);
return new_ns;
@@ -2361,7 +2427,7 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
*/
static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
{
- struct mnt_namespace *new_ns = alloc_mnt_ns();
+ struct mnt_namespace *new_ns = alloc_mnt_ns(&init_user_ns);
if (!IS_ERR(new_ns)) {
struct mount *mnt = real_mount(m);
mnt->mnt_ns = new_ns;
@@ -2501,7 +2567,7 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root,
struct mount *new_mnt, *root_mnt;
int error;
- if (!capable(CAP_SYS_ADMIN))
+ if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN))
return -EPERM;
error = user_path_dir(new_root, &new);
@@ -2583,8 +2649,13 @@ static void __init init_mount_tree(void)
struct vfsmount *mnt;
struct mnt_namespace *ns;
struct path root;
+ struct file_system_type *type;
- mnt = do_kern_mount("rootfs", 0, "rootfs", NULL);
+ type = get_fs_type("rootfs");
+ if (!type)
+ panic("Can't find rootfs type");
+ mnt = vfs_kern_mount(type, 0, "rootfs", NULL);
+ put_filesystem(type);
if (IS_ERR(mnt))
panic("Can't create rootfs");
@@ -2647,7 +2718,7 @@ void put_mnt_ns(struct mnt_namespace *ns)
br_write_unlock(&vfsmount_lock);
up_write(&namespace_sem);
release_mounts(&umount_list);
- kfree(ns);
+ free_mnt_ns(ns);
}
struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
@@ -2681,3 +2752,72 @@ bool our_mnt(struct vfsmount *mnt)
{
return check_mnt(real_mount(mnt));
}
+
+static void *mntns_get(struct task_struct *task)
+{
+ struct mnt_namespace *ns = NULL;
+ struct nsproxy *nsproxy;
+
+ rcu_read_lock();
+ nsproxy = task_nsproxy(task);
+ if (nsproxy) {
+ ns = nsproxy->mnt_ns;
+ get_mnt_ns(ns);
+ }
+ rcu_read_unlock();
+
+ return ns;
+}
+
+static void mntns_put(void *ns)
+{
+ put_mnt_ns(ns);
+}
+
+static int mntns_install(struct nsproxy *nsproxy, void *ns)
+{
+ struct fs_struct *fs = current->fs;
+ struct mnt_namespace *mnt_ns = ns;
+ struct path root;
+
+ if (!ns_capable(mnt_ns->user_ns, CAP_SYS_ADMIN) ||
+ !nsown_capable(CAP_SYS_CHROOT) ||
+ !nsown_capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (fs->users != 1)
+ return -EINVAL;
+
+ get_mnt_ns(mnt_ns);
+ put_mnt_ns(nsproxy->mnt_ns);
+ nsproxy->mnt_ns = mnt_ns;
+
+ /* Find the root */
+ root.mnt = &mnt_ns->root->mnt;
+ root.dentry = mnt_ns->root->mnt.mnt_root;
+ path_get(&root);
+ while(d_mountpoint(root.dentry) && follow_down_one(&root))
+ ;
+
+ /* Update the pwd and root */
+ set_fs_pwd(fs, &root);
+ set_fs_root(fs, &root);
+
+ path_put(&root);
+ return 0;
+}
+
+static unsigned int mntns_inum(void *ns)
+{
+ struct mnt_namespace *mnt_ns = ns;
+ return mnt_ns->proc_inum;
+}
+
+const struct proc_ns_operations mntns_operations = {
+ .name = "mnt",
+ .type = CLONE_NEWNS,
+ .get = mntns_get,
+ .put = mntns_put,
+ .install = mntns_install,
+ .inum = mntns_inum,
+};
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index d7e9fe77188a..1acdad7fcec7 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -976,9 +976,7 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
goto out;
if (attr->ia_size != i_size_read(inode)) {
- result = vmtruncate(inode, attr->ia_size);
- if (result)
- goto out;
+ truncate_setsize(inode, attr->ia_size);
mark_inode_dirty(inode);
}
}
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index b7db60897f91..cce2c057bd2d 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -24,7 +24,7 @@ nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o
delegation.o idmap.o callback.o callback_xdr.o callback_proc.o \
nfs4namespace.o nfs4getroot.o nfs4client.o
nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o
-nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o
+nfsv4-$(CONFIG_NFS_V4_1) += nfs4session.o pnfs.o pnfs_dev.o
obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o
nfs_layout_nfsv41_files-y := nfs4filelayout.o nfs4filelayoutdev.o
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index f1027b06a1a9..4fa788c93f46 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -40,6 +40,7 @@
#include <linux/pagevec.h>
#include "../pnfs.h"
+#include "../nfs4session.h"
#include "../internal.h"
#include "blocklayout.h"
diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index dded26368111..862a2f16db64 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -118,7 +118,6 @@ int nfs_cache_register_sb(struct super_block *sb, struct cache_detail *cd)
struct dentry *dir;
dir = rpc_d_lookup_sb(sb, "cache");
- BUG_ON(dir == NULL);
ret = sunrpc_cache_register_pipefs(dir, cd->name, 0600, cd);
dput(dir);
return ret;
diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index 4251c2ae06ad..efd54f0a4c46 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -142,7 +142,7 @@ extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args,
struct cb_recallslotargs {
struct sockaddr *crsa_addr;
- uint32_t crsa_target_max_slots;
+ uint32_t crsa_target_highest_slotid;
};
extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args,
void *dummy,
@@ -167,8 +167,6 @@ extern __be32 nfs4_callback_layoutrecall(
struct cb_layoutrecallargs *args,
void *dummy, struct cb_process_state *cps);
-extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses);
-
struct cb_devicenotifyitem {
uint32_t cbd_notify_type;
uint32_t cbd_layout_type;
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 76b4a7a3e559..264d1aa935f2 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -14,6 +14,7 @@
#include "delegation.h"
#include "internal.h"
#include "pnfs.h"
+#include "nfs4session.h"
#ifdef NFS_DEBUG
#define NFSDBG_FACILITY NFSDBG_CALLBACK
@@ -205,7 +206,7 @@ static u32 initiate_bulk_draining(struct nfs_client *clp,
list_for_each_entry(lo, &server->layouts, plh_layouts) {
ino = igrab(lo->plh_inode);
- if (ino)
+ if (!ino)
continue;
spin_lock(&ino->i_lock);
/* Is this layout in the process of being freed? */
@@ -216,7 +217,6 @@ static u32 initiate_bulk_draining(struct nfs_client *clp,
}
pnfs_get_layout_hdr(lo);
spin_unlock(&ino->i_lock);
- BUG_ON(!list_empty(&lo->plh_bulk_recall));
list_add(&lo->plh_bulk_recall, &recall_list);
}
}
@@ -562,23 +562,16 @@ __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
if (!cps->clp) /* set in cb_sequence */
goto out;
- dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
+ dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %d\n",
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
- args->crsa_target_max_slots);
+ args->crsa_target_highest_slotid);
fc_tbl = &cps->clp->cl_session->fc_slot_table;
- status = htonl(NFS4ERR_BAD_HIGH_SLOT);
- if (args->crsa_target_max_slots > fc_tbl->max_slots ||
- args->crsa_target_max_slots < 1)
- goto out;
-
status = htonl(NFS4_OK);
- if (args->crsa_target_max_slots == fc_tbl->max_slots)
- goto out;
- fc_tbl->target_max_slots = args->crsa_target_max_slots;
- nfs41_handle_recall_slot(cps->clp);
+ nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid);
+ nfs41_server_notify_target_slotid_update(cps->clp);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 742ff4ffced7..59461c957d9d 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -16,6 +16,7 @@
#include "nfs4_fs.h"
#include "callback.h"
#include "internal.h"
+#include "nfs4session.h"
#define CB_OP_TAGLEN_MAXSZ (512)
#define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ)
@@ -520,7 +521,7 @@ static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
p = read_buf(xdr, 4);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
- args->crsa_target_max_slots = ntohl(*p++);
+ args->crsa_target_highest_slotid = ntohl(*p++);
return 0;
}
@@ -762,7 +763,7 @@ static void nfs4_callback_free_slot(struct nfs4_session *session)
* A single slot, so highest used slotid is either 0 or -1
*/
tbl->highest_used_slotid = NFS4_NO_SLOT;
- nfs4_check_drain_bc_complete(session);
+ nfs4_session_drain_complete(session, tbl);
spin_unlock(&tbl->slot_tbl_lock);
}
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 8b39a42ac35e..9f3c66438d0e 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -277,7 +277,7 @@ void nfs_put_client(struct nfs_client *clp)
nfs_cb_idr_remove_locked(clp);
spin_unlock(&nn->nfs_client_lock);
- BUG_ON(!list_empty(&clp->cl_superblocks));
+ WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
clp->rpc_ops->free_client(clp);
}
@@ -615,8 +615,7 @@ EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
*/
static void nfs_destroy_server(struct nfs_server *server)
{
- if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
- !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
+ if (server->nlm_host)
nlmclnt_done(server->nlm_host);
}
@@ -1061,10 +1060,6 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
if (error < 0)
goto error;
- BUG_ON(!server->nfs_client);
- BUG_ON(!server->nfs_client->rpc_ops);
- BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
-
/* Probe the root fh to retrieve its FSID */
error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr);
if (error < 0)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ce8cb926526b..1b2d7eb93796 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -450,7 +450,8 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
nfs_refresh_inode(dentry->d_inode, entry->fattr);
goto out;
} else {
- d_drop(dentry);
+ if (d_invalidate(dentry) != 0)
+ goto out;
dput(dentry);
}
}
@@ -870,7 +871,7 @@ out:
return res;
}
-static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
+static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int whence)
{
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = dentry->d_inode;
@@ -879,10 +880,10 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
dfprintk(FILE, "NFS: llseek dir(%s/%s, %lld, %d)\n",
dentry->d_parent->d_name.name,
dentry->d_name.name,
- offset, origin);
+ offset, whence);
mutex_lock(&inode->i_mutex);
- switch (origin) {
+ switch (whence) {
case 1:
offset += filp->f_pos;
case 0:
@@ -978,10 +979,11 @@ static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)
* particular file and the "nocto" mount flag is not set.
*
*/
-static inline
+static
int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
{
struct nfs_server *server = NFS_SERVER(inode);
+ int ret;
if (IS_AUTOMOUNT(inode))
return 0;
@@ -992,9 +994,13 @@ int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) &&
(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
goto out_force;
- return 0;
+out:
+ return (inode->i_nlink == 0) ? -ENOENT : 0;
out_force:
- return __nfs_revalidate_inode(server, inode);
+ ret = __nfs_revalidate_inode(server, inode);
+ if (ret != 0)
+ return ret;
+ goto out;
}
/*
@@ -1100,6 +1106,8 @@ out_set_verifier:
out_zap_parent:
nfs_zap_caches(dir);
out_bad:
+ nfs_free_fattr(fattr);
+ nfs_free_fhandle(fhandle);
nfs_mark_for_revalidate(dir);
if (inode && S_ISDIR(inode->i_mode)) {
/* Purge readdir caches. */
@@ -1112,8 +1120,6 @@ out_zap_parent:
shrink_dcache_parent(dentry);
}
d_drop(dentry);
- nfs_free_fattr(fattr);
- nfs_free_fhandle(fhandle);
dput(parent);
dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n",
__func__, dentry->d_parent->d_name.name,
@@ -1155,11 +1161,14 @@ static int nfs_dentry_delete(const struct dentry *dentry)
}
+/* Ensure that we revalidate inode->i_nlink */
static void nfs_drop_nlink(struct inode *inode)
{
spin_lock(&inode->i_lock);
- if (inode->i_nlink > 0)
- drop_nlink(inode);
+ /* drop the inode if we're reasonably sure this is the last link */
+ if (inode->i_nlink == 1)
+ clear_nlink(inode);
+ NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
spin_unlock(&inode->i_lock);
}
@@ -1174,8 +1183,8 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
- drop_nlink(inode);
nfs_complete_unlink(dentry, inode);
+ nfs_drop_nlink(inode);
}
iput(inode);
}
@@ -1646,10 +1655,8 @@ static int nfs_safe_remove(struct dentry *dentry)
if (inode != NULL) {
NFS_PROTO(inode)->return_delegation(inode);
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
- /* The VFS may want to delete this inode */
if (error == 0)
nfs_drop_nlink(inode);
- nfs_mark_for_revalidate(inode);
} else
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
if (error == -ENOENT)
@@ -2146,12 +2153,16 @@ static int nfs_open_permission_mask(int openflags)
{
int mask = 0;
- if ((openflags & O_ACCMODE) != O_WRONLY)
- mask |= MAY_READ;
- if ((openflags & O_ACCMODE) != O_RDONLY)
- mask |= MAY_WRITE;
- if (openflags & __FMODE_EXEC)
- mask |= MAY_EXEC;
+ if (openflags & __FMODE_EXEC) {
+ /* ONLY check exec rights */
+ mask = MAY_EXEC;
+ } else {
+ if ((openflags & O_ACCMODE) != O_WRONLY)
+ mask |= MAY_READ;
+ if ((openflags & O_ACCMODE) != O_RDONLY)
+ mask |= MAY_WRITE;
+ }
+
return mask;
}
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index cae26cbd59ee..0bd7a55a5f07 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -266,21 +266,8 @@ static void nfs_direct_read_completion(struct nfs_pgio_header *hdr)
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
struct page *page = req->wb_page;
- if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
- if (bytes > hdr->good_bytes)
- zero_user(page, 0, PAGE_SIZE);
- else if (hdr->good_bytes - bytes < PAGE_SIZE)
- zero_user_segment(page,
- hdr->good_bytes & ~PAGE_MASK,
- PAGE_SIZE);
- }
- if (!PageCompound(page)) {
- if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) {
- if (bytes < hdr->good_bytes)
- set_page_dirty(page);
- } else
- set_page_dirty(page);
- }
+ if (!PageCompound(page) && bytes < hdr->good_bytes)
+ set_page_dirty(page);
bytes += req->wb_bytes;
nfs_list_remove_request(req);
nfs_direct_readpage_release(req);
diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c
index 31c26c4dcc23..ca4b11ec87a2 100644
--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c
@@ -217,7 +217,7 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen)
{
char buf1[NFS_DNS_HOSTNAME_MAXLEN+1];
struct nfs_dns_ent key, *item;
- unsigned long ttl;
+ unsigned int ttl;
ssize_t len;
int ret = -EINVAL;
@@ -240,7 +240,8 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen)
key.namelen = len;
memset(&key.h, 0, sizeof(key.h));
- ttl = get_expiry(&buf);
+ if (get_uint(&buf, &ttl) < 0)
+ goto out;
if (ttl == 0)
goto out;
key.h.expiry_time = ttl + seconds_since_boot();
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 582bb8866131..3c2b893665ba 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -119,18 +119,18 @@ force_reval:
return __nfs_revalidate_inode(server, inode);
}
-loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
+loff_t nfs_file_llseek(struct file *filp, loff_t offset, int whence)
{
dprintk("NFS: llseek file(%s/%s, %lld, %d)\n",
filp->f_path.dentry->d_parent->d_name.name,
filp->f_path.dentry->d_name.name,
- offset, origin);
+ offset, whence);
/*
- * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+ * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
* the cached file length
*/
- if (origin != SEEK_SET && origin != SEEK_CUR) {
+ if (whence != SEEK_SET && whence != SEEK_CUR) {
struct inode *inode = filp->f_mapping->host;
int retval = nfs_revalidate_file_size(inode, filp);
@@ -138,7 +138,7 @@ loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
return (loff_t)retval;
}
- return generic_file_llseek(filp, offset, origin);
+ return generic_file_llseek(filp, offset, whence);
}
EXPORT_SYMBOL_GPL(nfs_file_llseek);
diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index c817787fbdb4..24d1d1c5fcaf 100644
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -307,6 +307,7 @@ void nfs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
nfs_fscache_inode_unlock(inode);
}
}
+EXPORT_SYMBOL_GPL(nfs_fscache_set_inode_cookie);
/*
* Replace a per-inode cookie due to revalidation detecting a file having
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index c5b11b53ff33..4ecb76652eba 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -153,6 +153,22 @@ static inline void nfs_readpage_to_fscache(struct inode *inode,
}
/*
+ * Invalidate the contents of fscache for this inode. This will not sleep.
+ */
+static inline void nfs_fscache_invalidate(struct inode *inode)
+{
+ fscache_invalidate(NFS_I(inode)->fscache);
+}
+
+/*
+ * Wait for an object to finish being invalidated.
+ */
+static inline void nfs_fscache_wait_on_invalidate(struct inode *inode)
+{
+ fscache_wait_on_invalidate(NFS_I(inode)->fscache);
+}
+
+/*
* indicate the client caching state as readable text
*/
static inline const char *nfs_server_fscache_state(struct nfs_server *server)
@@ -162,7 +178,6 @@ static inline const char *nfs_server_fscache_state(struct nfs_server *server)
return "no ";
}
-
#else /* CONFIG_NFS_FSCACHE */
static inline int nfs_fscache_register(void) { return 0; }
static inline void nfs_fscache_unregister(void) {}
@@ -205,6 +220,10 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx,
static inline void nfs_readpage_to_fscache(struct inode *inode,
struct page *page, int sync) {}
+
+static inline void nfs_fscache_invalidate(struct inode *inode) {}
+static inline void nfs_fscache_wait_on_invalidate(struct inode *inode) {}
+
static inline const char *nfs_server_fscache_state(struct nfs_server *server)
{
return "no ";
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 9cc4a3fbf4b0..bc3968fa81e5 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -193,19 +193,15 @@ static int nfs_idmap_init_keyring(void)
if (!cred)
return -ENOMEM;
- keyring = key_alloc(&key_type_keyring, ".id_resolver", 0, 0, cred,
- (KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ,
- KEY_ALLOC_NOT_IN_QUOTA);
+ keyring = keyring_alloc(".id_resolver", 0, 0, cred,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
+ KEY_ALLOC_NOT_IN_QUOTA, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto failed_put_cred;
}
- ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL);
- if (ret < 0)
- goto failed_put_key;
-
ret = register_key_type(&key_type_id_resolver);
if (ret < 0)
goto failed_put_key;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 5c7325c5c5e6..ebeb94ce1b0b 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -107,13 +107,19 @@ u64 nfs_compat_user_ino64(u64 fileid)
return ino;
}
+int nfs_drop_inode(struct inode *inode)
+{
+ return NFS_STALE(inode) || generic_drop_inode(inode);
+}
+EXPORT_SYMBOL_GPL(nfs_drop_inode);
+
void nfs_clear_inode(struct inode *inode)
{
/*
* The following should never happen...
*/
- BUG_ON(nfs_have_writebacks(inode));
- BUG_ON(!list_empty(&NFS_I(inode)->open_files));
+ WARN_ON_ONCE(nfs_have_writebacks(inode));
+ WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
nfs_zap_acl_cache(inode);
nfs_access_zap_cache(inode);
nfs_fscache_release_inode_cookie(inode);
@@ -155,10 +161,12 @@ static void nfs_zap_caches_locked(struct inode *inode)
nfsi->attrtimeo_timestamp = jiffies;
memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
- if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
+ if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
- else
+ nfs_fscache_invalidate(inode);
+ } else {
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
+ }
}
void nfs_zap_caches(struct inode *inode)
@@ -173,6 +181,7 @@ void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
if (mapping->nrpages != 0) {
spin_lock(&inode->i_lock);
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
+ nfs_fscache_invalidate(inode);
spin_unlock(&inode->i_lock);
}
}
@@ -685,7 +694,10 @@ static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
dput(ctx->dentry);
- nfs_sb_deactive(sb);
+ if (is_sync)
+ nfs_sb_deactive(sb);
+ else
+ nfs_sb_deactive_async(sb);
kfree(ctx->mdsthreshold);
kfree(ctx);
}
@@ -872,7 +884,7 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
spin_unlock(&inode->i_lock);
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
- nfs_fscache_reset_inode_cookie(inode);
+ nfs_fscache_wait_on_invalidate(inode);
dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
return 0;
@@ -948,6 +960,10 @@ static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr
i_size_write(inode, nfs_size_to_loff_t(fattr->size));
ret |= NFS_INO_INVALID_ATTR;
}
+
+ if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
+ nfs_fscache_invalidate(inode);
+
return ret;
}
@@ -1196,8 +1212,10 @@ static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr
struct nfs_inode *nfsi = NFS_I(inode);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
- if (S_ISDIR(inode->i_mode))
+ if (S_ISDIR(inode->i_mode)) {
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
+ nfs_fscache_invalidate(inode);
+ }
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
return 0;
return nfs_refresh_inode_locked(inode, fattr);
@@ -1485,6 +1503,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
(save_cache_validity & NFS_INO_REVAL_FORCED))
nfsi->cache_validity |= invalid;
+ if (invalid & NFS_INO_INVALID_DATA)
+ nfs_fscache_invalidate(inode);
+
return 0;
out_err:
/*
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 59b133c5d652..f0e6c7df1a07 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -18,27 +18,6 @@ struct nfs_string;
*/
#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
-/*
- * Determine if sessions are in use.
- */
-static inline int nfs4_has_session(const struct nfs_client *clp)
-{
-#ifdef CONFIG_NFS_V4_1
- if (clp->cl_session)
- return 1;
-#endif /* CONFIG_NFS_V4_1 */
- return 0;
-}
-
-static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
-{
-#ifdef CONFIG_NFS_V4_1
- if (nfs4_has_session(clp))
- return (clp->cl_session->flags & SESSION4_PERSIST);
-#endif /* CONFIG_NFS_V4_1 */
- return 0;
-}
-
static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
{
if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
@@ -276,8 +255,6 @@ extern const u32 nfs41_maxwrite_overhead;
extern struct rpc_procinfo nfs4_procedures[];
#endif
-extern int nfs4_init_ds_session(struct nfs_client *, unsigned long);
-
/* proc.c */
void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
@@ -319,6 +296,7 @@ extern struct workqueue_struct *nfsiod_workqueue;
extern struct inode *nfs_alloc_inode(struct super_block *sb);
extern void nfs_destroy_inode(struct inode *);
extern int nfs_write_inode(struct inode *, struct writeback_control *);
+extern int nfs_drop_inode(struct inode *);
extern void nfs_clear_inode(struct inode *);
extern void nfs_evict_inode(struct inode *);
void nfs_zap_acl_cache(struct inode *inode);
@@ -351,10 +329,12 @@ extern int __init register_nfs_fs(void);
extern void __exit unregister_nfs_fs(void);
extern void nfs_sb_active(struct super_block *sb);
extern void nfs_sb_deactive(struct super_block *sb);
+extern void nfs_sb_deactive_async(struct super_block *sb);
/* namespace.c */
+#define NFS_PATH_CANONICAL 1
extern char *nfs_path(char **p, struct dentry *dentry,
- char *buffer, ssize_t buflen);
+ char *buffer, ssize_t buflen, unsigned flags);
extern struct vfsmount *nfs_d_automount(struct path *path);
struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
struct nfs_fh *, struct nfs_fattr *);
@@ -384,9 +364,6 @@ extern int nfs_initiate_read(struct rpc_clnt *clnt,
extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr);
-extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
- struct inode *inode,
- const struct nfs_pgio_completion_ops *compl_ops);
extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
extern void nfs_readdata_release(struct nfs_read_data *rdata);
@@ -409,9 +386,6 @@ extern struct nfs_write_header *nfs_writehdr_alloc(void);
extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr);
-extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
- struct inode *inode, int ioflags,
- const struct nfs_pgio_completion_ops *compl_ops);
extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
extern void nfs_writedata_release(struct nfs_write_data *wdata);
extern void nfs_commit_free(struct nfs_commit_data *p);
@@ -472,18 +446,6 @@ extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
const struct rpc_timeout *timeparms,
const char *ip_addr,
rpc_authflavor_t authflavour);
-extern int _nfs4_call_sync(struct rpc_clnt *clnt,
- struct nfs_server *server,
- struct rpc_message *msg,
- struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- int cache_reply);
-extern int _nfs4_call_sync_session(struct rpc_clnt *clnt,
- struct nfs_server *server,
- struct rpc_message *msg,
- struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- int cache_reply);
extern int nfs40_walk_client_list(struct nfs_client *clp,
struct nfs_client **result,
struct rpc_cred *cred);
@@ -498,7 +460,7 @@ static inline char *nfs_devname(struct dentry *dentry,
char *buffer, ssize_t buflen)
{
char *dummy;
- return nfs_path(&dummy, dentry, buffer, buflen);
+ return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
}
/*
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index 8e65c7f1f87c..91a6faf811ac 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -169,6 +169,9 @@ int nfs_mount(struct nfs_mount_request *info)
(info->hostname ? info->hostname : "server"),
info->dirpath);
+ if (strlen(info->dirpath) > MNTPATHLEN)
+ return -ENAMETOOLONG;
+
if (info->noresvport)
args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
@@ -181,7 +184,7 @@ int nfs_mount(struct nfs_mount_request *info)
else
msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT];
- status = rpc_call_sync(mnt_clnt, &msg, 0);
+ status = rpc_call_sync(mnt_clnt, &msg, RPC_TASK_SOFT|RPC_TASK_TIMEOUT);
rpc_shutdown_client(mnt_clnt);
if (status < 0)
@@ -242,6 +245,9 @@ void nfs_umount(const struct nfs_mount_request *info)
struct rpc_clnt *clnt;
int status;
+ if (strlen(info->dirpath) > MNTPATHLEN)
+ return;
+
if (info->noresvport)
args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
@@ -283,7 +289,6 @@ static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname)
const u32 pathname_len = strlen(pathname);
__be32 *p;
- BUG_ON(pathname_len > MNTPATHLEN);
p = xdr_reserve_space(xdr, 4 + pathname_len);
xdr_encode_opaque(p, pathname, pathname_len);
}
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 655925373b91..dd057bc6b65b 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -33,6 +33,7 @@ int nfs_mountpoint_expiry_timeout = 500 * HZ;
* @dentry - pointer to dentry
* @buffer - result buffer
* @buflen - length of buffer
+ * @flags - options (see below)
*
* Helper function for constructing the server pathname
* by arbitrary hashed dentry.
@@ -40,8 +41,14 @@ int nfs_mountpoint_expiry_timeout = 500 * HZ;
* This is mainly for use in figuring out the path on the
* server side when automounting on top of an existing partition
* and in generating /proc/mounts and friends.
+ *
+ * Supported flags:
+ * NFS_PATH_CANONICAL: ensure there is exactly one slash after
+ * the original device (export) name
+ * (if unset, the original name is returned verbatim)
*/
-char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen)
+char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen,
+ unsigned flags)
{
char *end;
int namelen;
@@ -74,7 +81,7 @@ rename_retry:
rcu_read_unlock();
goto rename_retry;
}
- if (*end != '/') {
+ if ((flags & NFS_PATH_CANONICAL) && *end != '/') {
if (--buflen < 0) {
spin_unlock(&dentry->d_lock);
rcu_read_unlock();
@@ -91,9 +98,11 @@ rename_retry:
return end;
}
namelen = strlen(base);
- /* Strip off excess slashes in base string */
- while (namelen > 0 && base[namelen - 1] == '/')
- namelen--;
+ if (flags & NFS_PATH_CANONICAL) {
+ /* Strip off excess slashes in base string */
+ while (namelen > 0 && base[namelen - 1] == '/')
+ namelen--;
+ }
buflen -= namelen;
if (buflen < 0) {
spin_unlock(&dentry->d_lock);
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index d04f0df7be55..06b9df49f7f7 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -195,7 +195,6 @@ static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
__be32 *p;
- BUG_ON(fh->size != NFS2_FHSIZE);
p = xdr_reserve_space(xdr, NFS2_FHSIZE);
memcpy(p, fh->data, NFS2_FHSIZE);
}
@@ -388,7 +387,7 @@ static void encode_filename(struct xdr_stream *xdr,
{
__be32 *p;
- BUG_ON(length > NFS2_MAXNAMLEN);
+ WARN_ON_ONCE(length > NFS2_MAXNAMLEN);
p = xdr_reserve_space(xdr, 4 + length);
xdr_encode_opaque(p, name, length);
}
@@ -428,7 +427,6 @@ static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length)
{
__be32 *p;
- BUG_ON(length > NFS2_MAXPATHLEN);
p = xdr_reserve_space(xdr, 4);
*p = cpu_to_be32(length);
xdr_write_pages(xdr, pages, 0, length);
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 69322096c325..70efb63b1e42 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -24,14 +24,14 @@
#define NFSDBG_FACILITY NFSDBG_PROC
-/* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */
+/* A wrapper to handle the EJUKEBOX error messages */
static int
nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
{
int res;
do {
res = rpc_call_sync(clnt, msg, flags);
- if (res != -EJUKEBOX && res != -EKEYEXPIRED)
+ if (res != -EJUKEBOX)
break;
freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
res = -ERESTARTSYS;
@@ -44,7 +44,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
static int
nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
{
- if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED)
+ if (task->tk_status != -EJUKEBOX)
return 0;
if (task->tk_status == -EJUKEBOX)
nfs_inc_stats(inode, NFSIOS_DELAY);
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 6cbe89400dfc..bffc32406fbf 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -198,7 +198,7 @@ static void encode_filename3(struct xdr_stream *xdr,
{
__be32 *p;
- BUG_ON(length > NFS3_MAXNAMLEN);
+ WARN_ON_ONCE(length > NFS3_MAXNAMLEN);
p = xdr_reserve_space(xdr, 4 + length);
xdr_encode_opaque(p, name, length);
}
@@ -238,7 +238,6 @@ out_overflow:
static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
const u32 length)
{
- BUG_ON(length > NFS3_MAXPATHLEN);
encode_uint32(xdr, length);
xdr_write_pages(xdr, pages, 0, length);
}
@@ -388,7 +387,6 @@ out_overflow:
*/
static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
{
- BUG_ON(type > NF3FIFO);
encode_uint32(xdr, type);
}
@@ -443,7 +441,7 @@ static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
{
__be32 *p;
- BUG_ON(fh->size > NFS3_FHSIZE);
+ WARN_ON_ONCE(fh->size > NFS3_FHSIZE);
p = xdr_reserve_space(xdr, 4 + fh->size);
xdr_encode_opaque(p, fh->data, fh->size);
}
@@ -1339,6 +1337,7 @@ static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
error = nfsacl_encode(xdr->buf, base, args->inode,
(args->mask & NFS_ACL) ?
args->acl_access : NULL, 1, 0);
+ /* FIXME: this is just broken */
BUG_ON(error < 0);
error = nfsacl_encode(xdr->buf, base + error, args->inode,
(args->mask & NFS_DFACL) ?
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index a525fdefccde..a3f488b074a2 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -11,6 +11,8 @@
#if IS_ENABLED(CONFIG_NFS_V4)
+#define NFS4_MAX_LOOP_ON_RECOVER (10)
+
struct idmap;
enum nfs4_client_state {
@@ -21,18 +23,12 @@ enum nfs4_client_state {
NFS4CLNT_RECLAIM_NOGRACE,
NFS4CLNT_DELEGRETURN,
NFS4CLNT_SESSION_RESET,
- NFS4CLNT_RECALL_SLOT,
NFS4CLNT_LEASE_CONFIRM,
NFS4CLNT_SERVER_SCOPE_MISMATCH,
NFS4CLNT_PURGE_STATE,
NFS4CLNT_BIND_CONN_TO_SESSION,
};
-enum nfs4_session_state {
- NFS4_SESSION_INITING,
- NFS4_SESSION_DRAINING,
-};
-
#define NFS4_RENEW_TIMEOUT 0x01
#define NFS4_RENEW_DELEGATION_CB 0x02
@@ -43,8 +39,7 @@ struct nfs4_minor_version_ops {
struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- int cache_reply);
+ struct nfs4_sequence_res *res);
bool (*match_stateid)(const nfs4_stateid *,
const nfs4_stateid *);
int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
@@ -241,18 +236,14 @@ static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *ser
return server->nfs_client->cl_session;
}
-extern bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy);
extern int nfs4_setup_sequence(const struct nfs_server *server,
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
struct rpc_task *task);
extern int nfs41_setup_sequence(struct nfs4_session *session,
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
struct rpc_task *task);
-extern void nfs4_destroy_session(struct nfs4_session *session);
-extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *);
extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *);
-extern int nfs4_init_session(struct nfs_server *server);
extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
struct nfs_fsinfo *fsinfo);
extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
@@ -280,11 +271,7 @@ static inline int nfs4_setup_sequence(const struct nfs_server *server,
struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
struct rpc_task *task)
{
- return 0;
-}
-
-static inline int nfs4_init_session(struct nfs_server *server)
-{
+ rpc_call_start(task);
return 0;
}
@@ -321,17 +308,20 @@ extern void nfs4_renew_state(struct work_struct *);
/* nfs4state.c */
struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
+struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
int nfs4_discover_server_trunking(struct nfs_client *clp,
struct nfs_client **);
int nfs40_discover_server_trunking(struct nfs_client *clp,
struct nfs_client **, struct rpc_cred *);
#if defined(CONFIG_NFS_V4_1)
-struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);
int nfs41_discover_server_trunking(struct nfs_client *clp,
struct nfs_client **, struct rpc_cred *);
extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
+extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp);
+extern void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp);
+
#else
static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
{
@@ -349,11 +339,12 @@ extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
extern void nfs_inode_find_state_and_recover(struct inode *inode,
const nfs4_stateid *stateid);
extern void nfs4_schedule_lease_recovery(struct nfs_client *);
+extern int nfs4_wait_clnt_recover(struct nfs_client *clp);
+extern int nfs4_client_recover_expired_lease(struct nfs_client *clp);
extern void nfs4_schedule_state_manager(struct nfs_client *);
extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
-extern void nfs41_handle_recall_slot(struct nfs_client *clp);
extern void nfs41_handle_server_scope(struct nfs_client *,
struct nfs41_server_scope **);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 6bacfde1319a..acc347268124 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -12,6 +12,7 @@
#include "internal.h"
#include "callback.h"
#include "delegation.h"
+#include "nfs4session.h"
#include "pnfs.h"
#include "netns.h"
@@ -713,10 +714,6 @@ static int nfs4_server_common_setup(struct nfs_server *server,
struct nfs_fattr *fattr;
int error;
- BUG_ON(!server->nfs_client);
- BUG_ON(!server->nfs_client->rpc_ops);
- BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
-
/* data servers support only a subset of NFSv4.1 */
if (is_ds_only_client(server->nfs_client))
return -EPROTONOSUPPORT;
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index afddd6639afb..08ddcccb8887 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -5,6 +5,7 @@
*/
#include <linux/nfs_fs.h>
#include "internal.h"
+#include "fscache.h"
#include "pnfs.h"
#define NFSDBG_FACILITY NFSDBG_FILE
@@ -20,7 +21,6 @@ nfs4_file_open(struct inode *inode, struct file *filp)
struct iattr attr;
int err;
- BUG_ON(inode != dentry->d_inode);
/*
* If no cached dentry exists or if it's negative, NFSv4 handled the
* opens in ->lookup() or ->create().
@@ -75,6 +75,7 @@ nfs4_file_open(struct inode *inode, struct file *filp)
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
nfs_file_set_open_context(filp, ctx);
+ nfs_fscache_set_inode_cookie(inode, filp);
err = 0;
out_put_ctx:
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 2e45fd9c02a3..194c48410336 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -35,6 +35,7 @@
#include <linux/sunrpc/metrics.h>
+#include "nfs4session.h"
#include "internal.h"
#include "delegation.h"
#include "nfs4filelayout.h"
@@ -178,7 +179,6 @@ static int filelayout_async_handle_error(struct rpc_task *task,
break;
case -NFS4ERR_DELAY:
case -NFS4ERR_GRACE:
- case -EKEYEXPIRED:
rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX);
break;
case -NFS4ERR_RETRY_UNCACHED_REP:
@@ -306,12 +306,10 @@ static void filelayout_read_prepare(struct rpc_task *task, void *data)
}
rdata->read_done_cb = filelayout_read_done_cb;
- if (nfs41_setup_sequence(rdata->ds_clp->cl_session,
- &rdata->args.seq_args, &rdata->res.seq_res,
- task))
- return;
-
- rpc_call_start(task);
+ nfs41_setup_sequence(rdata->ds_clp->cl_session,
+ &rdata->args.seq_args,
+ &rdata->res.seq_res,
+ task);
}
static void filelayout_read_call_done(struct rpc_task *task, void *data)
@@ -408,12 +406,10 @@ static void filelayout_write_prepare(struct rpc_task *task, void *data)
rpc_exit(task, 0);
return;
}
- if (nfs41_setup_sequence(wdata->ds_clp->cl_session,
- &wdata->args.seq_args, &wdata->res.seq_res,
- task))
- return;
-
- rpc_call_start(task);
+ nfs41_setup_sequence(wdata->ds_clp->cl_session,
+ &wdata->args.seq_args,
+ &wdata->res.seq_res,
+ task);
}
static void filelayout_write_call_done(struct rpc_task *task, void *data)
@@ -449,12 +445,10 @@ static void filelayout_commit_prepare(struct rpc_task *task, void *data)
{
struct nfs_commit_data *wdata = data;
- if (nfs41_setup_sequence(wdata->ds_clp->cl_session,
- &wdata->args.seq_args, &wdata->res.seq_res,
- task))
- return;
-
- rpc_call_start(task);
+ nfs41_setup_sequence(wdata->ds_clp->cl_session,
+ &wdata->args.seq_args,
+ &wdata->res.seq_res,
+ task);
}
static void filelayout_write_commit_done(struct rpc_task *task, void *data)
@@ -512,7 +506,6 @@ filelayout_read_pagelist(struct nfs_read_data *data)
loff_t offset = data->args.offset;
u32 j, idx;
struct nfs_fh *fh;
- int status;
dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n",
__func__, hdr->inode->i_ino,
@@ -538,9 +531,8 @@ filelayout_read_pagelist(struct nfs_read_data *data)
data->mds_offset = offset;
/* Perform an asynchronous read to ds */
- status = nfs_initiate_read(ds->ds_clp->cl_rpcclient, data,
+ nfs_initiate_read(ds->ds_clp->cl_rpcclient, data,
&filelayout_read_call_ops, RPC_TASK_SOFTCONN);
- BUG_ON(status != 0);
return PNFS_ATTEMPTED;
}
@@ -554,7 +546,6 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync)
loff_t offset = data->args.offset;
u32 j, idx;
struct nfs_fh *fh;
- int status;
/* Retrieve the correct rpc_client for the byte range */
j = nfs4_fl_calc_j_index(lseg, offset);
@@ -579,10 +570,9 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync)
data->args.offset = filelayout_get_dserver_offset(lseg, offset);
/* Perform an asynchronous write */
- status = nfs_initiate_write(ds->ds_clp->cl_rpcclient, data,
+ nfs_initiate_write(ds->ds_clp->cl_rpcclient, data,
&filelayout_write_call_ops, sync,
RPC_TASK_SOFTCONN);
- BUG_ON(status != 0);
return PNFS_ATTEMPTED;
}
@@ -909,7 +899,7 @@ static void
filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req)
{
- BUG_ON(pgio->pg_lseg != NULL);
+ WARN_ON_ONCE(pgio->pg_lseg != NULL);
if (req->wb_offset != req->wb_pgbase) {
/*
@@ -939,7 +929,7 @@ filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_commit_info cinfo;
int status;
- BUG_ON(pgio->pg_lseg != NULL);
+ WARN_ON_ONCE(pgio->pg_lseg != NULL);
if (req->wb_offset != req->wb_pgbase)
goto out_mds;
@@ -1187,7 +1177,6 @@ static void filelayout_recover_commit_reqs(struct list_head *dst,
*/
for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
if (transfer_commit_list(&b->written, dst, cinfo, 0)) {
- BUG_ON(!list_empty(&b->written));
pnfs_put_lseg(b->wlseg);
b->wlseg = NULL;
}
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index a8eaa9b7bb0f..b720064bcd7f 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -33,6 +33,7 @@
#include <linux/module.h>
#include "internal.h"
+#include "nfs4session.h"
#include "nfs4filelayout.h"
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
@@ -162,8 +163,6 @@ nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds)
dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
- BUG_ON(list_empty(&ds->ds_addrs));
-
list_for_each_entry(da, &ds->ds_addrs, da_node) {
dprintk("%s: DS %s: trying address %s\n",
__func__, ds->ds_remotestr, da->da_remotestr);
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 79fbb61ce202..1e09eb78543b 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -81,7 +81,8 @@ static char *nfs_path_component(const char *nfspath, const char *end)
static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen)
{
char *limit;
- char *path = nfs_path(&limit, dentry, buffer, buflen);
+ char *path = nfs_path(&limit, dentry, buffer, buflen,
+ NFS_PATH_CANONICAL);
if (!IS_ERR(path)) {
char *path_component = nfs_path_component(path, limit);
if (path_component)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 68b21d81b7ac..cf747ef86650 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -52,7 +52,6 @@
#include <linux/mount.h>
#include <linux/module.h>
#include <linux/nfs_idmap.h>
-#include <linux/sunrpc/bc_xprt.h>
#include <linux/xattr.h>
#include <linux/utsname.h>
#include <linux/freezer.h>
@@ -64,14 +63,14 @@
#include "callback.h"
#include "pnfs.h"
#include "netns.h"
+#include "nfs4session.h"
+#include "fscache.h"
#define NFSDBG_FACILITY NFSDBG_PROC
#define NFS4_POLL_RETRY_MIN (HZ/10)
#define NFS4_POLL_RETRY_MAX (15*HZ)
-#define NFS4_MAX_LOOP_ON_RECOVER (10)
-
struct nfs4_opendata;
static int _nfs4_proc_open(struct nfs4_opendata *data);
static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
@@ -206,7 +205,6 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent
{
__be32 *start, *p;
- BUG_ON(readdir->count < 80);
if (cookie > 2) {
readdir->cookie = cookie;
memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
@@ -256,22 +254,6 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent
kunmap_atomic(start);
}
-static int nfs4_wait_clnt_recover(struct nfs_client *clp)
-{
- int res;
-
- might_sleep();
-
- res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
- nfs_wait_bit_killable, TASK_KILLABLE);
- if (res)
- return res;
-
- if (clp->cl_cons_state < 0)
- return clp->cl_cons_state;
- return 0;
-}
-
static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
{
int res = 0;
@@ -339,8 +321,7 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc
dprintk("%s ERROR: %d Reset session\n", __func__,
errorcode);
nfs4_schedule_session_recovery(clp->cl_session, errorcode);
- exception->retry = 1;
- break;
+ goto wait_on_recovery;
#endif /* defined(CONFIG_NFS_V4_1) */
case -NFS4ERR_FILE_OPEN:
if (exception->timeout > HZ) {
@@ -352,7 +333,6 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc
}
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
ret = nfs4_delay(server->client, &exception->timeout);
if (ret != 0)
break;
@@ -398,144 +378,136 @@ static void renew_lease(const struct nfs_server *server, unsigned long timestamp
#if defined(CONFIG_NFS_V4_1)
-/*
- * nfs4_free_slot - free a slot and efficiently update slot table.
- *
- * freeing a slot is trivially done by clearing its respective bit
- * in the bitmap.
- * If the freed slotid equals highest_used_slotid we want to update it
- * so that the server would be able to size down the slot table if needed,
- * otherwise we know that the highest_used_slotid is still in use.
- * When updating highest_used_slotid there may be "holes" in the bitmap
- * so we need to scan down from highest_used_slotid to 0 looking for the now
- * highest slotid in use.
- * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
- *
- * Must be called while holding tbl->slot_tbl_lock
- */
-static void
-nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
-{
- BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
- /* clear used bit in bitmap */
- __clear_bit(slotid, tbl->used_slots);
-
- /* update highest_used_slotid when it is freed */
- if (slotid == tbl->highest_used_slotid) {
- slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
- if (slotid < tbl->max_slots)
- tbl->highest_used_slotid = slotid;
- else
- tbl->highest_used_slotid = NFS4_NO_SLOT;
- }
- dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
- slotid, tbl->highest_used_slotid);
-}
-
-bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
-{
- rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
- return true;
-}
-
-/*
- * Signal state manager thread if session fore channel is drained
- */
-static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
-{
- if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
- rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
- nfs4_set_task_privileged, NULL);
- return;
- }
-
- if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
- return;
-
- dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
- complete(&ses->fc_slot_table.complete);
-}
-
-/*
- * Signal state manager thread if session back channel is drained
- */
-void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
-{
- if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
- ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
- return;
- dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
- complete(&ses->bc_slot_table.complete);
-}
-
static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
{
+ struct nfs4_session *session;
struct nfs4_slot_table *tbl;
+ bool send_new_highest_used_slotid = false;
- tbl = &res->sr_session->fc_slot_table;
if (!res->sr_slot) {
/* just wake up the next guy waiting since
* we may have not consumed a slot after all */
dprintk("%s: No slot\n", __func__);
return;
}
+ tbl = res->sr_slot->table;
+ session = tbl->session;
spin_lock(&tbl->slot_tbl_lock);
- nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
- nfs4_check_drain_fc_complete(res->sr_session);
+ /* Be nice to the server: try to ensure that the last transmitted
+ * value for highest_user_slotid <= target_highest_slotid
+ */
+ if (tbl->highest_used_slotid > tbl->target_highest_slotid)
+ send_new_highest_used_slotid = true;
+
+ if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
+ send_new_highest_used_slotid = false;
+ goto out_unlock;
+ }
+ nfs4_free_slot(tbl, res->sr_slot);
+
+ if (tbl->highest_used_slotid != NFS4_NO_SLOT)
+ send_new_highest_used_slotid = false;
+out_unlock:
spin_unlock(&tbl->slot_tbl_lock);
res->sr_slot = NULL;
+ if (send_new_highest_used_slotid)
+ nfs41_server_notify_highest_slotid_update(session->clp);
}
static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
{
- unsigned long timestamp;
+ struct nfs4_session *session;
+ struct nfs4_slot *slot;
struct nfs_client *clp;
-
- /*
- * sr_status remains 1 if an RPC level error occurred. The server
- * may or may not have processed the sequence operation..
- * Proceed as if the server received and processed the sequence
- * operation.
- */
- if (res->sr_status == 1)
- res->sr_status = NFS_OK;
+ bool interrupted = false;
+ int ret = 1;
/* don't increment the sequence number if the task wasn't sent */
if (!RPC_WAS_SENT(task))
goto out;
+ slot = res->sr_slot;
+ session = slot->table->session;
+
+ if (slot->interrupted) {
+ slot->interrupted = 0;
+ interrupted = true;
+ }
+
/* Check the SEQUENCE operation status */
switch (res->sr_status) {
case 0:
/* Update the slot's sequence and clientid lease timer */
- ++res->sr_slot->seq_nr;
- timestamp = res->sr_renewal_time;
- clp = res->sr_session->clp;
- do_renew_lease(clp, timestamp);
+ ++slot->seq_nr;
+ clp = session->clp;
+ do_renew_lease(clp, res->sr_timestamp);
/* Check sequence flags */
if (res->sr_status_flags != 0)
nfs4_schedule_lease_recovery(clp);
+ nfs41_update_target_slotid(slot->table, slot, res);
break;
+ case 1:
+ /*
+ * sr_status remains 1 if an RPC level error occurred.
+ * The server may or may not have processed the sequence
+ * operation..
+ * Mark the slot as having hosted an interrupted RPC call.
+ */
+ slot->interrupted = 1;
+ goto out;
case -NFS4ERR_DELAY:
/* The server detected a resend of the RPC call and
* returned NFS4ERR_DELAY as per Section 2.10.6.2
* of RFC5661.
*/
- dprintk("%s: slot=%td seq=%d: Operation in progress\n",
+ dprintk("%s: slot=%u seq=%u: Operation in progress\n",
__func__,
- res->sr_slot - res->sr_session->fc_slot_table.slots,
- res->sr_slot->seq_nr);
+ slot->slot_nr,
+ slot->seq_nr);
goto out_retry;
+ case -NFS4ERR_BADSLOT:
+ /*
+ * The slot id we used was probably retired. Try again
+ * using a different slot id.
+ */
+ goto retry_nowait;
+ case -NFS4ERR_SEQ_MISORDERED:
+ /*
+ * Was the last operation on this sequence interrupted?
+ * If so, retry after bumping the sequence number.
+ */
+ if (interrupted) {
+ ++slot->seq_nr;
+ goto retry_nowait;
+ }
+ /*
+ * Could this slot have been previously retired?
+ * If so, then the server may be expecting seq_nr = 1!
+ */
+ if (slot->seq_nr != 1) {
+ slot->seq_nr = 1;
+ goto retry_nowait;
+ }
+ break;
+ case -NFS4ERR_SEQ_FALSE_RETRY:
+ ++slot->seq_nr;
+ goto retry_nowait;
default:
/* Just update the slot sequence no. */
- ++res->sr_slot->seq_nr;
+ ++slot->seq_nr;
}
out:
/* The session may be reset by one of the error handlers. */
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
nfs41_sequence_free_slot(res);
- return 1;
+ return ret;
+retry_nowait:
+ if (rpc_restart_call_prepare(task)) {
+ task->tk_status = 0;
+ ret = 0;
+ }
+ goto out;
out_retry:
if (!rpc_restart_call(task))
goto out;
@@ -546,55 +518,27 @@ out_retry:
static int nfs4_sequence_done(struct rpc_task *task,
struct nfs4_sequence_res *res)
{
- if (res->sr_session == NULL)
+ if (res->sr_slot == NULL)
return 1;
return nfs41_sequence_done(task, res);
}
-/*
- * nfs4_find_slot - efficiently look for a free slot
- *
- * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
- * If found, we mark the slot as used, update the highest_used_slotid,
- * and respectively set up the sequence operation args.
- * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
- *
- * Note: must be called with under the slot_tbl_lock.
- */
-static u32
-nfs4_find_slot(struct nfs4_slot_table *tbl)
-{
- u32 slotid;
- u32 ret_id = NFS4_NO_SLOT;
-
- dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
- __func__, tbl->used_slots[0], tbl->highest_used_slotid,
- tbl->max_slots);
- slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
- if (slotid >= tbl->max_slots)
- goto out;
- __set_bit(slotid, tbl->used_slots);
- if (slotid > tbl->highest_used_slotid ||
- tbl->highest_used_slotid == NFS4_NO_SLOT)
- tbl->highest_used_slotid = slotid;
- ret_id = slotid;
-out:
- dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
- __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
- return ret_id;
-}
-
static void nfs41_init_sequence(struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res, int cache_reply)
{
- args->sa_session = NULL;
+ args->sa_slot = NULL;
args->sa_cache_this = 0;
+ args->sa_privileged = 0;
if (cache_reply)
args->sa_cache_this = 1;
- res->sr_session = NULL;
res->sr_slot = NULL;
}
+static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
+{
+ args->sa_privileged = 1;
+}
+
int nfs41_setup_sequence(struct nfs4_session *session,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
@@ -602,59 +546,59 @@ int nfs41_setup_sequence(struct nfs4_session *session,
{
struct nfs4_slot *slot;
struct nfs4_slot_table *tbl;
- u32 slotid;
dprintk("--> %s\n", __func__);
/* slot already allocated? */
if (res->sr_slot != NULL)
- return 0;
+ goto out_success;
tbl = &session->fc_slot_table;
+ task->tk_timeout = 0;
+
spin_lock(&tbl->slot_tbl_lock);
if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
- !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
+ !args->sa_privileged) {
/* The state manager will wait until the slot table is empty */
- rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
- spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s session is draining\n", __func__);
- return -EAGAIN;
+ goto out_sleep;
}
- if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
- !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
- rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
- spin_unlock(&tbl->slot_tbl_lock);
- dprintk("%s enforce FIFO order\n", __func__);
- return -EAGAIN;
- }
-
- slotid = nfs4_find_slot(tbl);
- if (slotid == NFS4_NO_SLOT) {
- rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
- spin_unlock(&tbl->slot_tbl_lock);
+ slot = nfs4_alloc_slot(tbl);
+ if (IS_ERR(slot)) {
+ /* If out of memory, try again in 1/4 second */
+ if (slot == ERR_PTR(-ENOMEM))
+ task->tk_timeout = HZ >> 2;
dprintk("<-- %s: no free slots\n", __func__);
- return -EAGAIN;
+ goto out_sleep;
}
spin_unlock(&tbl->slot_tbl_lock);
- rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
- slot = tbl->slots + slotid;
- args->sa_session = session;
- args->sa_slotid = slotid;
+ args->sa_slot = slot;
- dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
+ dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
+ slot->slot_nr, slot->seq_nr);
- res->sr_session = session;
res->sr_slot = slot;
- res->sr_renewal_time = jiffies;
+ res->sr_timestamp = jiffies;
res->sr_status_flags = 0;
/*
* sr_status is only set in decode_sequence, and so will remain
* set to 1 if an rpc level failure occurs.
*/
res->sr_status = 1;
+out_success:
+ rpc_call_start(task);
return 0;
+out_sleep:
+ /* Privileged tasks are queued with top priority */
+ if (args->sa_privileged)
+ rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
+ NULL, RPC_PRIORITY_PRIVILEGED);
+ else
+ rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
+ spin_unlock(&tbl->slot_tbl_lock);
+ return -EAGAIN;
}
EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
@@ -666,12 +610,14 @@ int nfs4_setup_sequence(const struct nfs_server *server,
struct nfs4_session *session = nfs4_get_session(server);
int ret = 0;
- if (session == NULL)
+ if (session == NULL) {
+ rpc_call_start(task);
goto out;
+ }
- dprintk("--> %s clp %p session %p sr_slot %td\n",
+ dprintk("--> %s clp %p session %p sr_slot %d\n",
__func__, session->clp, session, res->sr_slot ?
- res->sr_slot - session->fc_slot_table.slots : -1);
+ res->sr_slot->slot_nr : -1);
ret = nfs41_setup_sequence(session, args, res, task);
out:
@@ -688,19 +634,11 @@ struct nfs41_call_sync_data {
static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
{
struct nfs41_call_sync_data *data = calldata;
+ struct nfs4_session *session = nfs4_get_session(data->seq_server);
dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
- if (nfs4_setup_sequence(data->seq_server, data->seq_args,
- data->seq_res, task))
- return;
- rpc_call_start(task);
-}
-
-static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
-{
- rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
- nfs41_call_sync_prepare(task, calldata);
+ nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
}
static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
@@ -715,17 +653,11 @@ static const struct rpc_call_ops nfs41_call_sync_ops = {
.rpc_call_done = nfs41_call_sync_done,
};
-static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
- .rpc_call_prepare = nfs41_call_priv_sync_prepare,
- .rpc_call_done = nfs41_call_sync_done,
-};
-
static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- int privileged)
+ struct nfs4_sequence_res *res)
{
int ret;
struct rpc_task *task;
@@ -741,8 +673,6 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
.callback_data = &data
};
- if (privileged)
- task_setup.callback_ops = &nfs41_call_priv_sync_ops;
task = rpc_run_task(&task_setup);
if (IS_ERR(task))
ret = PTR_ERR(task);
@@ -753,24 +683,18 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
return ret;
}
-int _nfs4_call_sync_session(struct rpc_clnt *clnt,
- struct nfs_server *server,
- struct rpc_message *msg,
- struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- int cache_reply)
-{
- nfs41_init_sequence(args, res, cache_reply);
- return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
-}
-
#else
-static inline
+static
void nfs41_init_sequence(struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res, int cache_reply)
{
}
+static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
+{
+}
+
+
static int nfs4_sequence_done(struct rpc_task *task,
struct nfs4_sequence_res *res)
{
@@ -778,18 +702,17 @@ static int nfs4_sequence_done(struct rpc_task *task,
}
#endif /* CONFIG_NFS_V4_1 */
+static
int _nfs4_call_sync(struct rpc_clnt *clnt,
struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
- struct nfs4_sequence_res *res,
- int cache_reply)
+ struct nfs4_sequence_res *res)
{
- nfs41_init_sequence(args, res, cache_reply);
return rpc_call_sync(clnt, msg, 0);
}
-static inline
+static
int nfs4_call_sync(struct rpc_clnt *clnt,
struct nfs_server *server,
struct rpc_message *msg,
@@ -797,8 +720,9 @@ int nfs4_call_sync(struct rpc_clnt *clnt,
struct nfs4_sequence_res *res,
int cache_reply)
{
+ nfs41_init_sequence(args, res, cache_reply);
return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
- args, res, cache_reply);
+ args, res);
}
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
@@ -810,6 +734,7 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
if (!cinfo->atomic || cinfo->before != dir->i_version)
nfs_force_lookup_revalidate(dir);
dir->i_version = cinfo->after;
+ nfs_fscache_invalidate(dir);
spin_unlock(&dir->i_lock);
}
@@ -1446,13 +1371,6 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state
nfs_inode_find_state_and_recover(state->inode,
stateid);
nfs4_schedule_stateid_recovery(server, state);
- case -EKEYEXPIRED:
- /*
- * User RPCSEC_GSS context has expired.
- * We cannot recover this stateid now, so
- * skip it and allow recovery thread to
- * proceed.
- */
case -ENOMEM:
err = 0;
goto out;
@@ -1572,21 +1490,15 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
data->timestamp = jiffies;
if (nfs4_setup_sequence(data->o_arg.server,
&data->o_arg.seq_args,
- &data->o_res.seq_res, task))
- return;
- rpc_call_start(task);
+ &data->o_res.seq_res,
+ task) != 0)
+ nfs_release_seqid(data->o_arg.seqid);
return;
unlock_no_action:
rcu_read_unlock();
out_no_action:
task->tk_action = NULL;
-
-}
-
-static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
-{
- rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
- nfs4_open_prepare(task, calldata);
+ nfs4_sequence_done(task, &data->o_res.seq_res);
}
static void nfs4_open_done(struct rpc_task *task, void *calldata)
@@ -1647,12 +1559,6 @@ static const struct rpc_call_ops nfs4_open_ops = {
.rpc_release = nfs4_open_release,
};
-static const struct rpc_call_ops nfs4_recover_open_ops = {
- .rpc_call_prepare = nfs4_recover_open_prepare,
- .rpc_call_done = nfs4_open_done,
- .rpc_release = nfs4_open_release,
-};
-
static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
{
struct inode *dir = data->dir->d_inode;
@@ -1682,7 +1588,7 @@ static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
data->rpc_status = 0;
data->cancelled = 0;
if (isrecover)
- task_setup_data.callback_ops = &nfs4_recover_open_ops;
+ nfs4_set_sequence_privileged(&o_arg->seq_args);
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
@@ -1720,7 +1626,8 @@ static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
static int nfs4_opendata_access(struct rpc_cred *cred,
struct nfs4_opendata *opendata,
- struct nfs4_state *state, fmode_t fmode)
+ struct nfs4_state *state, fmode_t fmode,
+ int openflags)
{
struct nfs_access_entry cache;
u32 mask;
@@ -1732,11 +1639,14 @@ static int nfs4_opendata_access(struct rpc_cred *cred,
mask = 0;
/* don't check MAY_WRITE - a newly created file may not have
- * write mode bits, but POSIX allows the creating process to write */
- if (fmode & FMODE_READ)
- mask |= MAY_READ;
- if (fmode & FMODE_EXEC)
- mask |= MAY_EXEC;
+ * write mode bits, but POSIX allows the creating process to write.
+ * use openflags to check for exec, because fmode won't
+ * always have FMODE_EXEC set when file open for exec. */
+ if (openflags & __FMODE_EXEC) {
+ /* ONLY check for exec rights */
+ mask = MAY_EXEC;
+ } else if (fmode & FMODE_READ)
+ mask = MAY_READ;
cache.cred = cred;
cache.jiffies = jiffies;
@@ -1748,7 +1658,7 @@ static int nfs4_opendata_access(struct rpc_cred *cred,
/* even though OPEN succeeded, access is denied. Close the file */
nfs4_close_state(state, fmode);
- return -NFS4ERR_ACCESS;
+ return -EACCES;
}
/*
@@ -1788,24 +1698,6 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
return 0;
}
-static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
-{
- unsigned int loop;
- int ret;
-
- for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
- ret = nfs4_wait_clnt_recover(clp);
- if (ret != 0)
- break;
- if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
- !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
- break;
- nfs4_schedule_state_manager(clp);
- ret = -EIO;
- }
- return ret;
-}
-
static int nfs4_recover_expired_lease(struct nfs_server *server)
{
return nfs4_client_recover_expired_lease(server->nfs_client);
@@ -2008,7 +1900,7 @@ static int _nfs4_do_open(struct inode *dir,
if (server->caps & NFS_CAP_POSIX_LOCK)
set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
- status = nfs4_opendata_access(cred, opendata, state, fmode);
+ status = nfs4_opendata_access(cred, opendata, state, fmode, flags);
if (status != 0)
goto err_opendata_put;
@@ -2196,7 +2088,7 @@ static void nfs4_free_closedata(void *data)
nfs4_put_open_state(calldata->state);
nfs_free_seqid(calldata->arg.seqid);
nfs4_put_state_owner(sp);
- nfs_sb_deactive(sb);
+ nfs_sb_deactive_async(sb);
kfree(calldata);
}
@@ -2281,6 +2173,7 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
if (!call_close) {
/* Note: exit _without_ calling nfs4_close_done */
task->tk_action = NULL;
+ nfs4_sequence_done(task, &calldata->res.seq_res);
goto out;
}
@@ -2296,9 +2189,8 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
if (nfs4_setup_sequence(NFS_SERVER(inode),
&calldata->arg.seq_args,
&calldata->res.seq_res,
- task))
- goto out;
- rpc_call_start(task);
+ task) != 0)
+ nfs_release_seqid(calldata->arg.seqid);
out:
dprintk("%s: done!\n", __func__);
}
@@ -2531,7 +2423,8 @@ static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
- BUG_ON(len < 0);
+ if (len < 0)
+ return len;
for (i = 0; i < len; i++) {
/* AUTH_UNIX is the default flavor if none was specified,
@@ -3036,12 +2929,10 @@ static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
{
- if (nfs4_setup_sequence(NFS_SERVER(data->dir),
- &data->args.seq_args,
- &data->res.seq_res,
- task))
- return;
- rpc_call_start(task);
+ nfs4_setup_sequence(NFS_SERVER(data->dir),
+ &data->args.seq_args,
+ &data->res.seq_res,
+ task);
}
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
@@ -3069,12 +2960,10 @@ static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
{
- if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
- &data->args.seq_args,
- &data->res.seq_res,
- task))
- return;
- rpc_call_start(task);
+ nfs4_setup_sequence(NFS_SERVER(data->old_dir),
+ &data->args.seq_args,
+ &data->res.seq_res,
+ task);
}
static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
@@ -3360,9 +3249,6 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
int mode = sattr->ia_mode;
int status = -ENOMEM;
- BUG_ON(!(sattr->ia_valid & ATTR_MODE));
- BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
-
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
if (data == NULL)
goto out;
@@ -3378,10 +3264,13 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
data->arg.ftype = NF4CHR;
data->arg.u.device.specdata1 = MAJOR(rdev);
data->arg.u.device.specdata2 = MINOR(rdev);
+ } else if (!S_ISSOCK(mode)) {
+ status = -EINVAL;
+ goto out_free;
}
status = nfs4_do_create(dir, dentry, data);
-
+out_free:
nfs4_free_createdata(data);
out:
return status;
@@ -3563,12 +3452,10 @@ static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message
static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
- if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
- &data->args.seq_args,
- &data->res.seq_res,
- task))
- return;
- rpc_call_start(task);
+ nfs4_setup_sequence(NFS_SERVER(data->header->inode),
+ &data->args.seq_args,
+ &data->res.seq_res,
+ task);
}
static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
@@ -3629,22 +3516,18 @@ static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_messag
static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
{
- if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
- &data->args.seq_args,
- &data->res.seq_res,
- task))
- return;
- rpc_call_start(task);
+ nfs4_setup_sequence(NFS_SERVER(data->header->inode),
+ &data->args.seq_args,
+ &data->res.seq_res,
+ task);
}
static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
{
- if (nfs4_setup_sequence(NFS_SERVER(data->inode),
- &data->args.seq_args,
- &data->res.seq_res,
- task))
- return;
- rpc_call_start(task);
+ nfs4_setup_sequence(NFS_SERVER(data->inode),
+ &data->args.seq_args,
+ &data->res.seq_res,
+ task);
}
static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
@@ -3935,8 +3818,13 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
goto out_free;
}
nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
- if (buf)
+ if (buf) {
+ if (res.acl_len > buflen) {
+ ret = -ERANGE;
+ goto out_free;
+ }
_copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
+ }
out_ok:
ret = res.acl_len;
out_free:
@@ -4083,7 +3971,6 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
case -NFS4ERR_DELAY:
nfs_inc_server_stats(server, NFSIOS_DELAY);
case -NFS4ERR_GRACE:
- case -EKEYEXPIRED:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
task->tk_status = 0;
return -EAGAIN;
@@ -4291,11 +4178,10 @@ static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
d_data = (struct nfs4_delegreturndata *)data;
- if (nfs4_setup_sequence(d_data->res.server,
- &d_data->args.seq_args,
- &d_data->res.seq_res, task))
- return;
- rpc_call_start(task);
+ nfs4_setup_sequence(d_data->res.server,
+ &d_data->args.seq_args,
+ &d_data->res.seq_res,
+ task);
}
#endif /* CONFIG_NFS_V4_1 */
@@ -4529,6 +4415,7 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
rpc_restart_call_prepare(task);
}
+ nfs_release_seqid(calldata->arg.seqid);
}
static void nfs4_locku_prepare(struct rpc_task *task, void *data)
@@ -4540,14 +4427,15 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data)
if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
/* Note: exit _without_ running nfs4_locku_done */
task->tk_action = NULL;
+ nfs4_sequence_done(task, &calldata->res.seq_res);
return;
}
calldata->timestamp = jiffies;
if (nfs4_setup_sequence(calldata->server,
&calldata->arg.seq_args,
- &calldata->res.seq_res, task))
- return;
- rpc_call_start(task);
+ &calldata->res.seq_res,
+ task) != 0)
+ nfs_release_seqid(calldata->arg.seqid);
}
static const struct rpc_call_ops nfs4_locku_ops = {
@@ -4691,8 +4579,9 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
return;
/* Do we need to do an open_to_lock_owner? */
if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
- if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
- return;
+ if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
+ goto out_release_lock_seqid;
+ }
data->arg.open_stateid = &state->stateid;
data->arg.new_lock_owner = 1;
data->res.open_seqid = data->arg.open_seqid;
@@ -4701,18 +4590,15 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
data->timestamp = jiffies;
if (nfs4_setup_sequence(data->server,
&data->arg.seq_args,
- &data->res.seq_res, task))
+ &data->res.seq_res,
+ task) == 0)
return;
- rpc_call_start(task);
+ nfs_release_seqid(data->arg.open_seqid);
+out_release_lock_seqid:
+ nfs_release_seqid(data->arg.lock_seqid);
dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
}
-static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
-{
- rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
- nfs4_lock_prepare(task, calldata);
-}
-
static void nfs4_lock_done(struct rpc_task *task, void *calldata)
{
struct nfs4_lockdata *data = calldata;
@@ -4765,12 +4651,6 @@ static const struct rpc_call_ops nfs4_lock_ops = {
.rpc_release = nfs4_lock_release,
};
-static const struct rpc_call_ops nfs4_recover_lock_ops = {
- .rpc_call_prepare = nfs4_recover_lock_prepare,
- .rpc_call_done = nfs4_lock_done,
- .rpc_release = nfs4_lock_release,
-};
-
static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
{
switch (error) {
@@ -4813,15 +4693,15 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
return -ENOMEM;
if (IS_SETLKW(cmd))
data->arg.block = 1;
- if (recovery_type > NFS_LOCK_NEW) {
- if (recovery_type == NFS_LOCK_RECLAIM)
- data->arg.reclaim = NFS_LOCK_RECLAIM;
- task_setup_data.callback_ops = &nfs4_recover_lock_ops;
- }
nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
msg.rpc_argp = &data->arg;
msg.rpc_resp = &data->res;
task_setup_data.callback_data = data;
+ if (recovery_type > NFS_LOCK_NEW) {
+ if (recovery_type == NFS_LOCK_RECLAIM)
+ data->arg.reclaim = NFS_LOCK_RECLAIM;
+ nfs4_set_sequence_privileged(&data->arg.seq_args);
+ }
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
@@ -5090,15 +4970,6 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
nfs4_schedule_stateid_recovery(server, state);
err = 0;
goto out;
- case -EKEYEXPIRED:
- /*
- * User RPCSEC_GSS context has expired.
- * We cannot recover this stateid now, so
- * skip it and allow recovery thread to
- * proceed.
- */
- err = 0;
- goto out;
case -ENOMEM:
case -NFS4ERR_DENIED:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
@@ -5347,7 +5218,6 @@ int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred
};
dprintk("--> %s\n", __func__);
- BUG_ON(clp == NULL);
res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
if (unlikely(res.session == NULL)) {
@@ -5559,20 +5429,16 @@ struct nfs4_get_lease_time_data {
static void nfs4_get_lease_time_prepare(struct rpc_task *task,
void *calldata)
{
- int ret;
struct nfs4_get_lease_time_data *data =
(struct nfs4_get_lease_time_data *)calldata;
dprintk("--> %s\n", __func__);
- rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
/* just setup sequence, do not trigger session recovery
since we're invoked within one */
- ret = nfs41_setup_sequence(data->clp->cl_session,
- &data->args->la_seq_args,
- &data->res->lr_seq_res, task);
-
- BUG_ON(ret == -EAGAIN);
- rpc_call_start(task);
+ nfs41_setup_sequence(data->clp->cl_session,
+ &data->args->la_seq_args,
+ &data->res->lr_seq_res,
+ task);
dprintk("<-- %s\n", __func__);
}
@@ -5634,6 +5500,7 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
int status;
nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
+ nfs4_set_sequence_privileged(&args.la_seq_args);
dprintk("--> %s\n", __func__);
task = rpc_run_task(&task_setup);
@@ -5648,145 +5515,6 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
return status;
}
-static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
-{
- return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
-}
-
-static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
- struct nfs4_slot *new,
- u32 max_slots,
- u32 ivalue)
-{
- struct nfs4_slot *old = NULL;
- u32 i;
-
- spin_lock(&tbl->slot_tbl_lock);
- if (new) {
- old = tbl->slots;
- tbl->slots = new;
- tbl->max_slots = max_slots;
- }
- tbl->highest_used_slotid = -1; /* no slot is currently used */
- for (i = 0; i < tbl->max_slots; i++)
- tbl->slots[i].seq_nr = ivalue;
- spin_unlock(&tbl->slot_tbl_lock);
- kfree(old);
-}
-
-/*
- * (re)Initialise a slot table
- */
-static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
- u32 ivalue)
-{
- struct nfs4_slot *new = NULL;
- int ret = -ENOMEM;
-
- dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
- max_reqs, tbl->max_slots);
-
- /* Does the newly negotiated max_reqs match the existing slot table? */
- if (max_reqs != tbl->max_slots) {
- new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
- if (!new)
- goto out;
- }
- ret = 0;
-
- nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
- dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
- tbl, tbl->slots, tbl->max_slots);
-out:
- dprintk("<-- %s: return %d\n", __func__, ret);
- return ret;
-}
-
-/* Destroy the slot table */
-static void nfs4_destroy_slot_tables(struct nfs4_session *session)
-{
- if (session->fc_slot_table.slots != NULL) {
- kfree(session->fc_slot_table.slots);
- session->fc_slot_table.slots = NULL;
- }
- if (session->bc_slot_table.slots != NULL) {
- kfree(session->bc_slot_table.slots);
- session->bc_slot_table.slots = NULL;
- }
- return;
-}
-
-/*
- * Initialize or reset the forechannel and backchannel tables
- */
-static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
-{
- struct nfs4_slot_table *tbl;
- int status;
-
- dprintk("--> %s\n", __func__);
- /* Fore channel */
- tbl = &ses->fc_slot_table;
- status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
- if (status) /* -ENOMEM */
- return status;
- /* Back channel */
- tbl = &ses->bc_slot_table;
- status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
- if (status && tbl->slots == NULL)
- /* Fore and back channel share a connection so get
- * both slot tables or neither */
- nfs4_destroy_slot_tables(ses);
- return status;
-}
-
-struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
-{
- struct nfs4_session *session;
- struct nfs4_slot_table *tbl;
-
- session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
- if (!session)
- return NULL;
-
- tbl = &session->fc_slot_table;
- tbl->highest_used_slotid = NFS4_NO_SLOT;
- spin_lock_init(&tbl->slot_tbl_lock);
- rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
- init_completion(&tbl->complete);
-
- tbl = &session->bc_slot_table;
- tbl->highest_used_slotid = NFS4_NO_SLOT;
- spin_lock_init(&tbl->slot_tbl_lock);
- rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
- init_completion(&tbl->complete);
-
- session->session_state = 1<<NFS4_SESSION_INITING;
-
- session->clp = clp;
- return session;
-}
-
-void nfs4_destroy_session(struct nfs4_session *session)
-{
- struct rpc_xprt *xprt;
- struct rpc_cred *cred;
-
- cred = nfs4_get_exchange_id_cred(session->clp);
- nfs4_proc_destroy_session(session, cred);
- if (cred)
- put_rpccred(cred);
-
- rcu_read_lock();
- xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
- rcu_read_unlock();
- dprintk("%s Destroy backchannel for xprt %p\n",
- __func__, xprt);
- xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
- nfs4_destroy_slot_tables(session);
- kfree(session);
-}
-
/*
* Initialize the values to be used by the client in CREATE_SESSION
* If nfs4_init_session set the fore channel request and response sizes,
@@ -5799,8 +5527,8 @@ void nfs4_destroy_session(struct nfs4_session *session)
static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
{
struct nfs4_session *session = args->client->cl_session;
- unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
- mxresp_sz = session->fc_attrs.max_resp_sz;
+ unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
+ mxresp_sz = session->fc_target_max_resp_sz;
if (mxrqst_sz == 0)
mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
@@ -5909,10 +5637,9 @@ static int _nfs4_proc_create_session(struct nfs_client *clp,
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
- if (!status)
+ if (!status) {
/* Verify the session's negotiated channel_attrs values */
status = nfs4_verify_channel_attrs(&args, session);
- if (!status) {
/* Increment the clientid slot sequence id */
clp->cl_seqid++;
}
@@ -5982,83 +5709,6 @@ int nfs4_proc_destroy_session(struct nfs4_session *session,
}
/*
- * With sessions, the client is not marked ready until after a
- * successful EXCHANGE_ID and CREATE_SESSION.
- *
- * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
- * other versions of NFS can be tried.
- */
-static int nfs41_check_session_ready(struct nfs_client *clp)
-{
- int ret;
-
- if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
- ret = nfs4_client_recover_expired_lease(clp);
- if (ret)
- return ret;
- }
- if (clp->cl_cons_state < NFS_CS_READY)
- return -EPROTONOSUPPORT;
- smp_rmb();
- return 0;
-}
-
-int nfs4_init_session(struct nfs_server *server)
-{
- struct nfs_client *clp = server->nfs_client;
- struct nfs4_session *session;
- unsigned int rsize, wsize;
-
- if (!nfs4_has_session(clp))
- return 0;
-
- session = clp->cl_session;
- spin_lock(&clp->cl_lock);
- if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
-
- rsize = server->rsize;
- if (rsize == 0)
- rsize = NFS_MAX_FILE_IO_SIZE;
- wsize = server->wsize;
- if (wsize == 0)
- wsize = NFS_MAX_FILE_IO_SIZE;
-
- session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
- session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
- }
- spin_unlock(&clp->cl_lock);
-
- return nfs41_check_session_ready(clp);
-}
-
-int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
-{
- struct nfs4_session *session = clp->cl_session;
- int ret;
-
- spin_lock(&clp->cl_lock);
- if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
- /*
- * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
- * DS lease to be equal to the MDS lease.
- */
- clp->cl_lease_time = lease_time;
- clp->cl_last_renewal = jiffies;
- }
- spin_unlock(&clp->cl_lock);
-
- ret = nfs41_check_session_ready(clp);
- if (ret)
- return ret;
- /* Test for the DS role */
- if (!is_ds_client(clp))
- return -ENODEV;
- return 0;
-}
-EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
-
-
-/*
* Renew the cl_session lease.
*/
struct nfs4_sequence_data {
@@ -6123,9 +5773,7 @@ static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
args = task->tk_msg.rpc_argp;
res = task->tk_msg.rpc_resp;
- if (nfs41_setup_sequence(clp->cl_session, args, res, task))
- return;
- rpc_call_start(task);
+ nfs41_setup_sequence(clp->cl_session, args, res, task);
}
static const struct rpc_call_ops nfs41_sequence_ops = {
@@ -6134,7 +5782,9 @@ static const struct rpc_call_ops nfs41_sequence_ops = {
.rpc_release = nfs41_sequence_release,
};
-static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
+static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
+ struct rpc_cred *cred,
+ bool is_privileged)
{
struct nfs4_sequence_data *calldata;
struct rpc_message msg = {
@@ -6156,6 +5806,8 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_
return ERR_PTR(-ENOMEM);
}
nfs41_init_sequence(&calldata->args, &calldata->res, 0);
+ if (is_privileged)
+ nfs4_set_sequence_privileged(&calldata->args);
msg.rpc_argp = &calldata->args;
msg.rpc_resp = &calldata->res;
calldata->clp = clp;
@@ -6171,7 +5823,7 @@ static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cr
if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
return 0;
- task = _nfs41_proc_sequence(clp, cred);
+ task = _nfs41_proc_sequence(clp, cred, false);
if (IS_ERR(task))
ret = PTR_ERR(task);
else
@@ -6185,7 +5837,7 @@ static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
struct rpc_task *task;
int ret;
- task = _nfs41_proc_sequence(clp, cred);
+ task = _nfs41_proc_sequence(clp, cred, true);
if (IS_ERR(task)) {
ret = PTR_ERR(task);
goto out;
@@ -6214,13 +5866,10 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
{
struct nfs4_reclaim_complete_data *calldata = data;
- rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
- if (nfs41_setup_sequence(calldata->clp->cl_session,
- &calldata->arg.seq_args,
- &calldata->res.seq_res, task))
- return;
-
- rpc_call_start(task);
+ nfs41_setup_sequence(calldata->clp->cl_session,
+ &calldata->arg.seq_args,
+ &calldata->res.seq_res,
+ task);
}
static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
@@ -6297,6 +5946,7 @@ static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
calldata->arg.one_fs = 0;
nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
+ nfs4_set_sequence_privileged(&calldata->arg.seq_args);
msg.rpc_argp = &calldata->arg;
msg.rpc_resp = &calldata->res;
task_setup_data.callback_data = calldata;
@@ -6320,6 +5970,7 @@ nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
{
struct nfs4_layoutget *lgp = calldata;
struct nfs_server *server = NFS_SERVER(lgp->args.inode);
+ struct nfs4_session *session = nfs4_get_session(server);
dprintk("--> %s\n", __func__);
/* Note the is a race here, where a CB_LAYOUTRECALL can come in
@@ -6327,16 +5978,14 @@ nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
* However, that is not so catastrophic, and there seems
* to be no way to prevent it completely.
*/
- if (nfs4_setup_sequence(server, &lgp->args.seq_args,
+ if (nfs41_setup_sequence(session, &lgp->args.seq_args,
&lgp->res.seq_res, task))
return;
if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
NFS_I(lgp->args.inode)->layout,
lgp->args.ctx->state)) {
rpc_exit(task, NFS4_OK);
- return;
}
- rpc_call_start(task);
}
static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
@@ -6349,7 +5998,7 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
dprintk("--> %s\n", __func__);
- if (!nfs4_sequence_done(task, &lgp->res.seq_res))
+ if (!nfs41_sequence_done(task, &lgp->res.seq_res))
goto out;
switch (task->tk_status) {
@@ -6500,10 +6149,10 @@ nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
struct nfs4_layoutreturn *lrp = calldata;
dprintk("--> %s\n", __func__);
- if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
- &lrp->res.seq_res, task))
- return;
- rpc_call_start(task);
+ nfs41_setup_sequence(lrp->clp->cl_session,
+ &lrp->args.seq_args,
+ &lrp->res.seq_res,
+ task);
}
static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
@@ -6513,7 +6162,7 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
dprintk("--> %s\n", __func__);
- if (!nfs4_sequence_done(task, &lrp->res.seq_res))
+ if (!nfs41_sequence_done(task, &lrp->res.seq_res))
return;
server = NFS_SERVER(lrp->args.inode);
@@ -6662,11 +6311,12 @@ static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
{
struct nfs4_layoutcommit_data *data = calldata;
struct nfs_server *server = NFS_SERVER(data->args.inode);
+ struct nfs4_session *session = nfs4_get_session(server);
- if (nfs4_setup_sequence(server, &data->args.seq_args,
- &data->res.seq_res, task))
- return;
- rpc_call_start(task);
+ nfs41_setup_sequence(session,
+ &data->args.seq_args,
+ &data->res.seq_res,
+ task);
}
static void
@@ -6675,7 +6325,7 @@ nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
struct nfs4_layoutcommit_data *data = calldata;
struct nfs_server *server = NFS_SERVER(data->args.inode);
- if (!nfs4_sequence_done(task, &data->res.seq_res))
+ if (!nfs41_sequence_done(task, &data->res.seq_res))
return;
switch (task->tk_status) { /* Just ignore these failures */
@@ -6863,7 +6513,9 @@ static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
dprintk("NFS call test_stateid %p\n", stateid);
nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
- status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
+ nfs4_set_sequence_privileged(&args.seq_args);
+ status = nfs4_call_sync_sequence(server->client, server, &msg,
+ &args.seq_args, &res.seq_res);
if (status != NFS_OK) {
dprintk("NFS reply test_stateid: failed, %d\n", status);
return status;
@@ -6910,8 +6562,9 @@ static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
dprintk("NFS call free_stateid %p\n", stateid);
nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
+ nfs4_set_sequence_privileged(&args.seq_args);
status = nfs4_call_sync_sequence(server->client, server, &msg,
- &args.seq_args, &res.seq_res, 1);
+ &args.seq_args, &res.seq_res);
dprintk("NFS reply free_stateid: %d\n", status);
return status;
}
@@ -7031,7 +6684,7 @@ static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
#if defined(CONFIG_NFS_V4_1)
static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
.minor_version = 1,
- .call_sync = _nfs4_call_sync_session,
+ .call_sync = nfs4_call_sync_sequence,
.match_stateid = nfs41_match_stateid,
.find_root_sec = nfs41_find_root_sec,
.reboot_recovery_ops = &nfs41_reboot_recovery_ops,
diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c
new file mode 100644
index 000000000000..ebda5f4a031b
--- /dev/null
+++ b/fs/nfs/nfs4session.c
@@ -0,0 +1,552 @@
+/*
+ * fs/nfs/nfs4session.c
+ *
+ * Copyright (c) 2012 Trond Myklebust <Trond.Myklebust@netapp.com>
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/bc_xprt.h>
+#include <linux/nfs.h>
+#include <linux/nfs4.h>
+#include <linux/nfs_fs.h>
+#include <linux/module.h>
+
+#include "nfs4_fs.h"
+#include "internal.h"
+#include "nfs4session.h"
+#include "callback.h"
+
+#define NFSDBG_FACILITY NFSDBG_STATE
+
+/*
+ * nfs4_shrink_slot_table - free retired slots from the slot table
+ */
+static void nfs4_shrink_slot_table(struct nfs4_slot_table *tbl, u32 newsize)
+{
+ struct nfs4_slot **p;
+ if (newsize >= tbl->max_slots)
+ return;
+
+ p = &tbl->slots;
+ while (newsize--)
+ p = &(*p)->next;
+ while (*p) {
+ struct nfs4_slot *slot = *p;
+
+ *p = slot->next;
+ kfree(slot);
+ tbl->max_slots--;
+ }
+}
+
+/*
+ * nfs4_free_slot - free a slot and efficiently update slot table.
+ *
+ * freeing a slot is trivially done by clearing its respective bit
+ * in the bitmap.
+ * If the freed slotid equals highest_used_slotid we want to update it
+ * so that the server would be able to size down the slot table if needed,
+ * otherwise we know that the highest_used_slotid is still in use.
+ * When updating highest_used_slotid there may be "holes" in the bitmap
+ * so we need to scan down from highest_used_slotid to 0 looking for the now
+ * highest slotid in use.
+ * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
+ *
+ * Must be called while holding tbl->slot_tbl_lock
+ */
+void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot)
+{
+ u32 slotid = slot->slot_nr;
+
+ /* clear used bit in bitmap */
+ __clear_bit(slotid, tbl->used_slots);
+
+ /* update highest_used_slotid when it is freed */
+ if (slotid == tbl->highest_used_slotid) {
+ u32 new_max = find_last_bit(tbl->used_slots, slotid);
+ if (new_max < slotid)
+ tbl->highest_used_slotid = new_max;
+ else {
+ tbl->highest_used_slotid = NFS4_NO_SLOT;
+ nfs4_session_drain_complete(tbl->session, tbl);
+ }
+ }
+ dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
+ slotid, tbl->highest_used_slotid);
+}
+
+static struct nfs4_slot *nfs4_new_slot(struct nfs4_slot_table *tbl,
+ u32 slotid, u32 seq_init, gfp_t gfp_mask)
+{
+ struct nfs4_slot *slot;
+
+ slot = kzalloc(sizeof(*slot), gfp_mask);
+ if (slot) {
+ slot->table = tbl;
+ slot->slot_nr = slotid;
+ slot->seq_nr = seq_init;
+ }
+ return slot;
+}
+
+static struct nfs4_slot *nfs4_find_or_create_slot(struct nfs4_slot_table *tbl,
+ u32 slotid, u32 seq_init, gfp_t gfp_mask)
+{
+ struct nfs4_slot **p, *slot;
+
+ p = &tbl->slots;
+ for (;;) {
+ if (*p == NULL) {
+ *p = nfs4_new_slot(tbl, tbl->max_slots,
+ seq_init, gfp_mask);
+ if (*p == NULL)
+ break;
+ tbl->max_slots++;
+ }
+ slot = *p;
+ if (slot->slot_nr == slotid)
+ return slot;
+ p = &slot->next;
+ }
+ return ERR_PTR(-ENOMEM);
+}
+
+/*
+ * nfs4_alloc_slot - efficiently look for a free slot
+ *
+ * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
+ * If found, we mark the slot as used, update the highest_used_slotid,
+ * and respectively set up the sequence operation args.
+ *
+ * Note: must be called with under the slot_tbl_lock.
+ */
+struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
+{
+ struct nfs4_slot *ret = ERR_PTR(-EBUSY);
+ u32 slotid;
+
+ dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
+ __func__, tbl->used_slots[0], tbl->highest_used_slotid,
+ tbl->max_slotid + 1);
+ slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1);
+ if (slotid > tbl->max_slotid)
+ goto out;
+ ret = nfs4_find_or_create_slot(tbl, slotid, 1, GFP_NOWAIT);
+ if (IS_ERR(ret))
+ goto out;
+ __set_bit(slotid, tbl->used_slots);
+ if (slotid > tbl->highest_used_slotid ||
+ tbl->highest_used_slotid == NFS4_NO_SLOT)
+ tbl->highest_used_slotid = slotid;
+ ret->generation = tbl->generation;
+
+out:
+ dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
+ __func__, tbl->used_slots[0], tbl->highest_used_slotid,
+ !IS_ERR(ret) ? ret->slot_nr : -1);
+ return ret;
+}
+
+static int nfs4_grow_slot_table(struct nfs4_slot_table *tbl,
+ u32 max_reqs, u32 ivalue)
+{
+ if (max_reqs <= tbl->max_slots)
+ return 0;
+ if (!IS_ERR(nfs4_find_or_create_slot(tbl, max_reqs - 1, ivalue, GFP_NOFS)))
+ return 0;
+ return -ENOMEM;
+}
+
+static void nfs4_reset_slot_table(struct nfs4_slot_table *tbl,
+ u32 server_highest_slotid,
+ u32 ivalue)
+{
+ struct nfs4_slot **p;
+
+ nfs4_shrink_slot_table(tbl, server_highest_slotid + 1);
+ p = &tbl->slots;
+ while (*p) {
+ (*p)->seq_nr = ivalue;
+ (*p)->interrupted = 0;
+ p = &(*p)->next;
+ }
+ tbl->highest_used_slotid = NFS4_NO_SLOT;
+ tbl->target_highest_slotid = server_highest_slotid;
+ tbl->server_highest_slotid = server_highest_slotid;
+ tbl->d_target_highest_slotid = 0;
+ tbl->d2_target_highest_slotid = 0;
+ tbl->max_slotid = server_highest_slotid;
+}
+
+/*
+ * (re)Initialise a slot table
+ */
+static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl,
+ u32 max_reqs, u32 ivalue)
+{
+ int ret;
+
+ dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
+ max_reqs, tbl->max_slots);
+
+ if (max_reqs > NFS4_MAX_SLOT_TABLE)
+ max_reqs = NFS4_MAX_SLOT_TABLE;
+
+ ret = nfs4_grow_slot_table(tbl, max_reqs, ivalue);
+ if (ret)
+ goto out;
+
+ spin_lock(&tbl->slot_tbl_lock);
+ nfs4_reset_slot_table(tbl, max_reqs - 1, ivalue);
+ spin_unlock(&tbl->slot_tbl_lock);
+
+ dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
+ tbl, tbl->slots, tbl->max_slots);
+out:
+ dprintk("<-- %s: return %d\n", __func__, ret);
+ return ret;
+}
+
+/* Destroy the slot table */
+static void nfs4_destroy_slot_tables(struct nfs4_session *session)
+{
+ nfs4_shrink_slot_table(&session->fc_slot_table, 0);
+ nfs4_shrink_slot_table(&session->bc_slot_table, 0);
+}
+
+static bool nfs41_assign_slot(struct rpc_task *task, void *pslot)
+{
+ struct nfs4_sequence_args *args = task->tk_msg.rpc_argp;
+ struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
+ struct nfs4_slot *slot = pslot;
+ struct nfs4_slot_table *tbl = slot->table;
+
+ if (nfs4_session_draining(tbl->session) && !args->sa_privileged)
+ return false;
+ slot->generation = tbl->generation;
+ args->sa_slot = slot;
+ res->sr_timestamp = jiffies;
+ res->sr_slot = slot;
+ res->sr_status_flags = 0;
+ res->sr_status = 1;
+ return true;
+}
+
+static bool __nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl,
+ struct nfs4_slot *slot)
+{
+ if (rpc_wake_up_first(&tbl->slot_tbl_waitq, nfs41_assign_slot, slot))
+ return true;
+ return false;
+}
+
+bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl,
+ struct nfs4_slot *slot)
+{
+ if (slot->slot_nr > tbl->max_slotid)
+ return false;
+ return __nfs41_wake_and_assign_slot(tbl, slot);
+}
+
+static bool nfs41_try_wake_next_slot_table_entry(struct nfs4_slot_table *tbl)
+{
+ struct nfs4_slot *slot = nfs4_alloc_slot(tbl);
+ if (!IS_ERR(slot)) {
+ bool ret = __nfs41_wake_and_assign_slot(tbl, slot);
+ if (ret)
+ return ret;
+ nfs4_free_slot(tbl, slot);
+ }
+ return false;
+}
+
+void nfs41_wake_slot_table(struct nfs4_slot_table *tbl)
+{
+ for (;;) {
+ if (!nfs41_try_wake_next_slot_table_entry(tbl))
+ break;
+ }
+}
+
+static void nfs41_set_max_slotid_locked(struct nfs4_slot_table *tbl,
+ u32 target_highest_slotid)
+{
+ u32 max_slotid;
+
+ max_slotid = min(NFS4_MAX_SLOT_TABLE - 1, target_highest_slotid);
+ if (max_slotid > tbl->server_highest_slotid)
+ max_slotid = tbl->server_highest_slotid;
+ if (max_slotid > tbl->target_highest_slotid)
+ max_slotid = tbl->target_highest_slotid;
+ tbl->max_slotid = max_slotid;
+ nfs41_wake_slot_table(tbl);
+}
+
+/* Update the client's idea of target_highest_slotid */
+static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl,
+ u32 target_highest_slotid)
+{
+ if (tbl->target_highest_slotid == target_highest_slotid)
+ return;
+ tbl->target_highest_slotid = target_highest_slotid;
+ tbl->generation++;
+}
+
+void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
+ u32 target_highest_slotid)
+{
+ spin_lock(&tbl->slot_tbl_lock);
+ nfs41_set_target_slotid_locked(tbl, target_highest_slotid);
+ tbl->d_target_highest_slotid = 0;
+ tbl->d2_target_highest_slotid = 0;
+ nfs41_set_max_slotid_locked(tbl, target_highest_slotid);
+ spin_unlock(&tbl->slot_tbl_lock);
+}
+
+static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl,
+ u32 highest_slotid)
+{
+ if (tbl->server_highest_slotid == highest_slotid)
+ return;
+ if (tbl->highest_used_slotid > highest_slotid)
+ return;
+ /* Deallocate slots */
+ nfs4_shrink_slot_table(tbl, highest_slotid + 1);
+ tbl->server_highest_slotid = highest_slotid;
+}
+
+static s32 nfs41_derivative_target_slotid(s32 s1, s32 s2)
+{
+ s1 -= s2;
+ if (s1 == 0)
+ return 0;
+ if (s1 < 0)
+ return (s1 - 1) >> 1;
+ return (s1 + 1) >> 1;
+}
+
+static int nfs41_sign_s32(s32 s1)
+{
+ if (s1 > 0)
+ return 1;
+ if (s1 < 0)
+ return -1;
+ return 0;
+}
+
+static bool nfs41_same_sign_or_zero_s32(s32 s1, s32 s2)
+{
+ if (!s1 || !s2)
+ return true;
+ return nfs41_sign_s32(s1) == nfs41_sign_s32(s2);
+}
+
+/* Try to eliminate outliers by checking for sharp changes in the
+ * derivatives and second derivatives
+ */
+static bool nfs41_is_outlier_target_slotid(struct nfs4_slot_table *tbl,
+ u32 new_target)
+{
+ s32 d_target, d2_target;
+ bool ret = true;
+
+ d_target = nfs41_derivative_target_slotid(new_target,
+ tbl->target_highest_slotid);
+ d2_target = nfs41_derivative_target_slotid(d_target,
+ tbl->d_target_highest_slotid);
+ /* Is first derivative same sign? */
+ if (nfs41_same_sign_or_zero_s32(d_target, tbl->d_target_highest_slotid))
+ ret = false;
+ /* Is second derivative same sign? */
+ if (nfs41_same_sign_or_zero_s32(d2_target, tbl->d2_target_highest_slotid))
+ ret = false;
+ tbl->d_target_highest_slotid = d_target;
+ tbl->d2_target_highest_slotid = d2_target;
+ return ret;
+}
+
+void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
+ struct nfs4_slot *slot,
+ struct nfs4_sequence_res *res)
+{
+ spin_lock(&tbl->slot_tbl_lock);
+ if (!nfs41_is_outlier_target_slotid(tbl, res->sr_target_highest_slotid))
+ nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid);
+ if (tbl->generation == slot->generation)
+ nfs41_set_server_slotid_locked(tbl, res->sr_highest_slotid);
+ nfs41_set_max_slotid_locked(tbl, res->sr_target_highest_slotid);
+ spin_unlock(&tbl->slot_tbl_lock);
+}
+
+/*
+ * Initialize or reset the forechannel and backchannel tables
+ */
+int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
+{
+ struct nfs4_slot_table *tbl;
+ int status;
+
+ dprintk("--> %s\n", __func__);
+ /* Fore channel */
+ tbl = &ses->fc_slot_table;
+ tbl->session = ses;
+ status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
+ if (status) /* -ENOMEM */
+ return status;
+ /* Back channel */
+ tbl = &ses->bc_slot_table;
+ tbl->session = ses;
+ status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
+ if (status && tbl->slots == NULL)
+ /* Fore and back channel share a connection so get
+ * both slot tables or neither */
+ nfs4_destroy_slot_tables(ses);
+ return status;
+}
+
+struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
+{
+ struct nfs4_session *session;
+ struct nfs4_slot_table *tbl;
+
+ session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
+ if (!session)
+ return NULL;
+
+ tbl = &session->fc_slot_table;
+ tbl->highest_used_slotid = NFS4_NO_SLOT;
+ spin_lock_init(&tbl->slot_tbl_lock);
+ rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
+ init_completion(&tbl->complete);
+
+ tbl = &session->bc_slot_table;
+ tbl->highest_used_slotid = NFS4_NO_SLOT;
+ spin_lock_init(&tbl->slot_tbl_lock);
+ rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
+ init_completion(&tbl->complete);
+
+ session->session_state = 1<<NFS4_SESSION_INITING;
+
+ session->clp = clp;
+ return session;
+}
+
+void nfs4_destroy_session(struct nfs4_session *session)
+{
+ struct rpc_xprt *xprt;
+ struct rpc_cred *cred;
+
+ cred = nfs4_get_exchange_id_cred(session->clp);
+ nfs4_proc_destroy_session(session, cred);
+ if (cred)
+ put_rpccred(cred);
+
+ rcu_read_lock();
+ xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
+ rcu_read_unlock();
+ dprintk("%s Destroy backchannel for xprt %p\n",
+ __func__, xprt);
+ xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
+ nfs4_destroy_slot_tables(session);
+ kfree(session);
+}
+
+/*
+ * With sessions, the client is not marked ready until after a
+ * successful EXCHANGE_ID and CREATE_SESSION.
+ *
+ * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
+ * other versions of NFS can be tried.
+ */
+static int nfs41_check_session_ready(struct nfs_client *clp)
+{
+ int ret;
+
+ if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
+ ret = nfs4_client_recover_expired_lease(clp);
+ if (ret)
+ return ret;
+ }
+ if (clp->cl_cons_state < NFS_CS_READY)
+ return -EPROTONOSUPPORT;
+ smp_rmb();
+ return 0;
+}
+
+int nfs4_init_session(struct nfs_server *server)
+{
+ struct nfs_client *clp = server->nfs_client;
+ struct nfs4_session *session;
+ unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
+ unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
+
+ if (!nfs4_has_session(clp))
+ return 0;
+
+ if (server->rsize != 0)
+ target_max_resp_sz = server->rsize;
+ target_max_resp_sz += nfs41_maxread_overhead;
+
+ if (server->wsize != 0)
+ target_max_rqst_sz = server->wsize;
+ target_max_rqst_sz += nfs41_maxwrite_overhead;
+
+ session = clp->cl_session;
+ spin_lock(&clp->cl_lock);
+ if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
+ /* Initialise targets and channel attributes */
+ session->fc_target_max_rqst_sz = target_max_rqst_sz;
+ session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
+ session->fc_target_max_resp_sz = target_max_resp_sz;
+ session->fc_attrs.max_resp_sz = target_max_resp_sz;
+ } else {
+ /* Just adjust the targets */
+ if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
+ session->fc_target_max_rqst_sz = target_max_rqst_sz;
+ set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
+ }
+ if (target_max_resp_sz > session->fc_target_max_resp_sz) {
+ session->fc_target_max_resp_sz = target_max_resp_sz;
+ set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
+ }
+ }
+ spin_unlock(&clp->cl_lock);
+
+ if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
+ nfs4_schedule_lease_recovery(clp);
+
+ return nfs41_check_session_ready(clp);
+}
+
+int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
+{
+ struct nfs4_session *session = clp->cl_session;
+ int ret;
+
+ spin_lock(&clp->cl_lock);
+ if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
+ /*
+ * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
+ * DS lease to be equal to the MDS lease.
+ */
+ clp->cl_lease_time = lease_time;
+ clp->cl_last_renewal = jiffies;
+ }
+ spin_unlock(&clp->cl_lock);
+
+ ret = nfs41_check_session_ready(clp);
+ if (ret)
+ return ret;
+ /* Test for the DS role */
+ if (!is_ds_client(clp))
+ return -ENODEV;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
+
+
diff --git a/fs/nfs/nfs4session.h b/fs/nfs/nfs4session.h
new file mode 100644
index 000000000000..6f3cb39386d4
--- /dev/null
+++ b/fs/nfs/nfs4session.h
@@ -0,0 +1,142 @@
+/*
+ * fs/nfs/nfs4session.h
+ *
+ * Copyright (c) 2012 Trond Myklebust <Trond.Myklebust@netapp.com>
+ *
+ */
+#ifndef __LINUX_FS_NFS_NFS4SESSION_H
+#define __LINUX_FS_NFS_NFS4SESSION_H
+
+/* maximum number of slots to use */
+#define NFS4_DEF_SLOT_TABLE_SIZE (16U)
+#define NFS4_MAX_SLOT_TABLE (1024U)
+#define NFS4_NO_SLOT ((u32)-1)
+
+#if IS_ENABLED(CONFIG_NFS_V4)
+
+/* Sessions slot seqid */
+struct nfs4_slot {
+ struct nfs4_slot_table *table;
+ struct nfs4_slot *next;
+ unsigned long generation;
+ u32 slot_nr;
+ u32 seq_nr;
+ unsigned int interrupted : 1;
+};
+
+/* Sessions */
+#define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
+struct nfs4_slot_table {
+ struct nfs4_session *session; /* Parent session */
+ struct nfs4_slot *slots; /* seqid per slot */
+ unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
+ spinlock_t slot_tbl_lock;
+ struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
+ u32 max_slots; /* # slots in table */
+ u32 max_slotid; /* Max allowed slotid value */
+ u32 highest_used_slotid; /* sent to server on each SEQ.
+ * op for dynamic resizing */
+ u32 target_highest_slotid; /* Server max_slot target */
+ u32 server_highest_slotid; /* Server highest slotid */
+ s32 d_target_highest_slotid; /* Derivative */
+ s32 d2_target_highest_slotid; /* 2nd derivative */
+ unsigned long generation; /* Generation counter for
+ target_highest_slotid */
+ struct completion complete;
+};
+
+/*
+ * Session related parameters
+ */
+struct nfs4_session {
+ struct nfs4_sessionid sess_id;
+ u32 flags;
+ unsigned long session_state;
+ u32 hash_alg;
+ u32 ssv_len;
+
+ /* The fore and back channel */
+ struct nfs4_channel_attrs fc_attrs;
+ struct nfs4_slot_table fc_slot_table;
+ struct nfs4_channel_attrs bc_attrs;
+ struct nfs4_slot_table bc_slot_table;
+ struct nfs_client *clp;
+ /* Create session arguments */
+ unsigned int fc_target_max_rqst_sz;
+ unsigned int fc_target_max_resp_sz;
+};
+
+enum nfs4_session_state {
+ NFS4_SESSION_INITING,
+ NFS4_SESSION_DRAINING,
+};
+
+#if defined(CONFIG_NFS_V4_1)
+extern struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl);
+extern void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot);
+
+extern void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
+ u32 target_highest_slotid);
+extern void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
+ struct nfs4_slot *slot,
+ struct nfs4_sequence_res *res);
+
+extern int nfs4_setup_session_slot_tables(struct nfs4_session *ses);
+
+extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
+extern void nfs4_destroy_session(struct nfs4_session *session);
+extern int nfs4_init_session(struct nfs_server *server);
+extern int nfs4_init_ds_session(struct nfs_client *, unsigned long);
+
+extern void nfs4_session_drain_complete(struct nfs4_session *session,
+ struct nfs4_slot_table *tbl);
+
+static inline bool nfs4_session_draining(struct nfs4_session *session)
+{
+ return !!test_bit(NFS4_SESSION_DRAINING, &session->session_state);
+}
+
+bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl,
+ struct nfs4_slot *slot);
+void nfs41_wake_slot_table(struct nfs4_slot_table *tbl);
+
+/*
+ * Determine if sessions are in use.
+ */
+static inline int nfs4_has_session(const struct nfs_client *clp)
+{
+ if (clp->cl_session)
+ return 1;
+ return 0;
+}
+
+static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
+{
+ if (nfs4_has_session(clp))
+ return (clp->cl_session->flags & SESSION4_PERSIST);
+ return 0;
+}
+
+#else /* defined(CONFIG_NFS_V4_1) */
+
+static inline int nfs4_init_session(struct nfs_server *server)
+{
+ return 0;
+}
+
+/*
+ * Determine if sessions are in use.
+ */
+static inline int nfs4_has_session(const struct nfs_client *clp)
+{
+ return 0;
+}
+
+static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
+{
+ return 0;
+}
+
+#endif /* defined(CONFIG_NFS_V4_1) */
+#endif /* IS_ENABLED(CONFIG_NFS_V4) */
+#endif /* __LINUX_FS_NFS_NFS4SESSION_H */
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index c351e6b39838..9448c579d41a 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -57,6 +57,7 @@
#include "callback.h"
#include "delegation.h"
#include "internal.h"
+#include "nfs4session.h"
#include "pnfs.h"
#include "netns.h"
@@ -66,7 +67,6 @@
const nfs4_stateid zero_stateid;
static DEFINE_MUTEX(nfs_clid_init_mutex);
-static LIST_HEAD(nfs4_clientid_list);
int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
{
@@ -254,24 +254,27 @@ static void nfs4_end_drain_session(struct nfs_client *clp)
{
struct nfs4_session *ses = clp->cl_session;
struct nfs4_slot_table *tbl;
- int max_slots;
if (ses == NULL)
return;
tbl = &ses->fc_slot_table;
if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
spin_lock(&tbl->slot_tbl_lock);
- max_slots = tbl->max_slots;
- while (max_slots--) {
- if (rpc_wake_up_first(&tbl->slot_tbl_waitq,
- nfs4_set_task_privileged,
- NULL) == NULL)
- break;
- }
+ nfs41_wake_slot_table(tbl);
spin_unlock(&tbl->slot_tbl_lock);
}
}
+/*
+ * Signal state manager thread if session fore channel is drained
+ */
+void nfs4_session_drain_complete(struct nfs4_session *session,
+ struct nfs4_slot_table *tbl)
+{
+ if (nfs4_session_draining(session))
+ complete(&tbl->complete);
+}
+
static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl)
{
spin_lock(&tbl->slot_tbl_lock);
@@ -303,7 +306,6 @@ static void nfs41_finish_session_reset(struct nfs_client *clp)
clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
/* create_session negotiated new slot table */
- clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);
clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
nfs41_setup_state_renewal(clp);
}
@@ -1086,7 +1088,6 @@ void nfs_free_seqid(struct nfs_seqid *seqid)
*/
static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
{
- BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid);
switch (status) {
case 0:
break;
@@ -1209,6 +1210,40 @@ void nfs4_schedule_lease_recovery(struct nfs_client *clp)
}
EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery);
+int nfs4_wait_clnt_recover(struct nfs_client *clp)
+{
+ int res;
+
+ might_sleep();
+
+ res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
+ nfs_wait_bit_killable, TASK_KILLABLE);
+ if (res)
+ return res;
+
+ if (clp->cl_cons_state < 0)
+ return clp->cl_cons_state;
+ return 0;
+}
+
+int nfs4_client_recover_expired_lease(struct nfs_client *clp)
+{
+ unsigned int loop;
+ int ret;
+
+ for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
+ ret = nfs4_wait_clnt_recover(clp);
+ if (ret != 0)
+ break;
+ if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
+ !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
+ break;
+ nfs4_schedule_state_manager(clp);
+ ret = -EIO;
+ }
+ return ret;
+}
+
/*
* nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
* @clp: client to process
@@ -1401,14 +1436,6 @@ restart:
/* Mark the file as being 'closed' */
state->state = 0;
break;
- case -EKEYEXPIRED:
- /*
- * User RPCSEC_GSS context has expired.
- * We cannot recover this stateid now, so
- * skip it and allow recovery thread to
- * proceed.
- */
- break;
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_BAD_STATEID:
@@ -1561,14 +1588,6 @@ static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp)
nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce);
}
-static void nfs4_warn_keyexpired(const char *s)
-{
- printk_ratelimited(KERN_WARNING "Error: state manager"
- " encountered RPCSEC_GSS session"
- " expired against NFSv4 server %s.\n",
- s);
-}
-
static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
{
switch (error) {
@@ -1602,10 +1621,6 @@ static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
break;
- case -EKEYEXPIRED:
- /* Nothing we can do */
- nfs4_warn_keyexpired(clp->cl_hostname);
- break;
default:
dprintk("%s: failed to handle error %d for server %s\n",
__func__, error, clp->cl_hostname);
@@ -1722,8 +1737,6 @@ static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status)
dprintk("%s: exit with error %d for server %s\n",
__func__, -EPROTONOSUPPORT, clp->cl_hostname);
return -EPROTONOSUPPORT;
- case -EKEYEXPIRED:
- nfs4_warn_keyexpired(clp->cl_hostname);
case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
* in nfs4_exchange_id */
default:
@@ -1876,7 +1889,6 @@ again:
break;
case -EKEYEXPIRED:
- nfs4_warn_keyexpired(clp->cl_hostname);
case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
* in nfs4_exchange_id */
status = -EKEYEXPIRED;
@@ -1907,14 +1919,23 @@ void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
}
EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery);
-void nfs41_handle_recall_slot(struct nfs_client *clp)
+static void nfs41_ping_server(struct nfs_client *clp)
{
- set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state);
- dprintk("%s: scheduling slot recall for server %s\n", __func__,
- clp->cl_hostname);
+ /* Use CHECK_LEASE to ping the server with a SEQUENCE */
+ set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
nfs4_schedule_state_manager(clp);
}
+void nfs41_server_notify_target_slotid_update(struct nfs_client *clp)
+{
+ nfs41_ping_server(clp);
+}
+
+void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp)
+{
+ nfs41_ping_server(clp);
+}
+
static void nfs4_reset_all_state(struct nfs_client *clp)
{
if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {
@@ -2024,35 +2045,6 @@ out:
return status;
}
-static int nfs4_recall_slot(struct nfs_client *clp)
-{
- struct nfs4_slot_table *fc_tbl;
- struct nfs4_slot *new, *old;
- int i;
-
- if (!nfs4_has_session(clp))
- return 0;
- nfs4_begin_drain_session(clp);
- fc_tbl = &clp->cl_session->fc_slot_table;
- new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot),
- GFP_NOFS);
- if (!new)
- return -ENOMEM;
-
- spin_lock(&fc_tbl->slot_tbl_lock);
- for (i = 0; i < fc_tbl->target_max_slots; i++)
- new[i].seq_nr = fc_tbl->slots[i].seq_nr;
- old = fc_tbl->slots;
- fc_tbl->slots = new;
- fc_tbl->max_slots = fc_tbl->target_max_slots;
- fc_tbl->target_max_slots = 0;
- clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots;
- spin_unlock(&fc_tbl->slot_tbl_lock);
-
- kfree(old);
- return 0;
-}
-
static int nfs4_bind_conn_to_session(struct nfs_client *clp)
{
struct rpc_cred *cred;
@@ -2083,7 +2075,6 @@ static int nfs4_bind_conn_to_session(struct nfs_client *clp)
#else /* CONFIG_NFS_V4_1 */
static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; }
-static int nfs4_recall_slot(struct nfs_client *clp) { return 0; }
static int nfs4_bind_conn_to_session(struct nfs_client *clp)
{
@@ -2115,15 +2106,6 @@ static void nfs4_state_manager(struct nfs_client *clp)
continue;
}
- if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) {
- section = "check lease";
- status = nfs4_check_lease(clp);
- if (status < 0)
- goto out_error;
- if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
- continue;
- }
-
/* Initialize or reset the session */
if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) {
section = "reset session";
@@ -2144,10 +2126,9 @@ static void nfs4_state_manager(struct nfs_client *clp)
continue;
}
- /* Recall session slots */
- if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) {
- section = "recall slot";
- status = nfs4_recall_slot(clp);
+ if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) {
+ section = "check lease";
+ status = nfs4_check_lease(clp);
if (status < 0)
goto out_error;
continue;
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index bd61221ad2c5..84d2e9e2f313 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -51,6 +51,7 @@ static const struct super_operations nfs4_sops = {
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs4_write_inode,
+ .drop_inode = nfs_drop_inode,
.put_super = nfs_put_super,
.statfs = nfs_statfs,
.evict_inode = nfs4_evict_inode,
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 40836ee5dc3a..26b143920433 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -56,6 +56,7 @@
#include "nfs4_fs.h"
#include "internal.h"
+#include "nfs4session.h"
#include "pnfs.h"
#include "netns.h"
@@ -270,6 +271,8 @@ static int nfs4_stat_to_errno(int);
#if defined(CONFIG_NFS_V4_1)
#define NFS4_MAX_MACHINE_NAME_LEN (64)
+#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \
+ sizeof(utsname()->version) + sizeof(utsname()->machine) + 8)
#define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
encode_verifier_maxsz + \
@@ -282,7 +285,7 @@ static int nfs4_stat_to_errno(int);
1 /* nii_domain */ + \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
1 /* nii_name */ + \
- XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ XDR_QUADLEN(IMPL_NAME_LIMIT) + \
3 /* nii_date */)
#define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
2 /* eir_clientid */ + \
@@ -936,7 +939,7 @@ static void encode_compound_hdr(struct xdr_stream *xdr,
* but this is not required as a MUST for the server to do so. */
hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
- BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
+ WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
encode_string(xdr, hdr->taglen, hdr->tag);
p = reserve_space(xdr, 8);
*p++ = cpu_to_be32(hdr->minorversion);
@@ -955,7 +958,7 @@ static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op,
static void encode_nops(struct compound_hdr *hdr)
{
- BUG_ON(hdr->nops > NFS4_MAX_OPS);
+ WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS);
*hdr->nops_p = htonl(hdr->nops);
}
@@ -1403,7 +1406,6 @@ static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *a
*p = cpu_to_be32(NFS4_OPEN_NOCREATE);
break;
default:
- BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
*p = cpu_to_be32(NFS4_OPEN_CREATE);
encode_createmode(xdr, arg);
}
@@ -1621,7 +1623,6 @@ encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compoun
p = reserve_space(xdr, 2*4);
*p++ = cpu_to_be32(1);
*p = cpu_to_be32(FATTR4_WORD0_ACL);
- BUG_ON(arg->acl_len % 4);
p = reserve_space(xdr, 4);
*p = cpu_to_be32(arg->acl_len);
xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
@@ -1713,7 +1714,7 @@ static void encode_exchange_id(struct xdr_stream *xdr,
struct compound_hdr *hdr)
{
__be32 *p;
- char impl_name[NFS4_OPAQUE_LIMIT];
+ char impl_name[IMPL_NAME_LIMIT];
int len = 0;
encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr);
@@ -1728,7 +1729,7 @@ static void encode_exchange_id(struct xdr_stream *xdr,
if (send_implementation_id &&
sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 &&
sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN)
- <= NFS4_OPAQUE_LIMIT + 1)
+ <= sizeof(impl_name) + 1)
len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s",
utsname()->sysname, utsname()->release,
utsname()->version, utsname()->machine);
@@ -1835,18 +1836,16 @@ static void encode_sequence(struct xdr_stream *xdr,
struct compound_hdr *hdr)
{
#if defined(CONFIG_NFS_V4_1)
- struct nfs4_session *session = args->sa_session;
+ struct nfs4_session *session;
struct nfs4_slot_table *tp;
- struct nfs4_slot *slot;
+ struct nfs4_slot *slot = args->sa_slot;
__be32 *p;
- if (!session)
+ if (slot == NULL)
return;
- tp = &session->fc_slot_table;
-
- WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
- slot = tp->slots + args->sa_slotid;
+ tp = slot->table;
+ session = tp->session;
encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr);
@@ -1860,12 +1859,12 @@ static void encode_sequence(struct xdr_stream *xdr,
((u32 *)session->sess_id.data)[1],
((u32 *)session->sess_id.data)[2],
((u32 *)session->sess_id.data)[3],
- slot->seq_nr, args->sa_slotid,
+ slot->seq_nr, slot->slot_nr,
tp->highest_used_slotid, args->sa_cache_this);
p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16);
p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
*p++ = cpu_to_be32(slot->seq_nr);
- *p++ = cpu_to_be32(args->sa_slotid);
+ *p++ = cpu_to_be32(slot->slot_nr);
*p++ = cpu_to_be32(tp->highest_used_slotid);
*p = cpu_to_be32(args->sa_cache_this);
#endif /* CONFIG_NFS_V4_1 */
@@ -2027,8 +2026,9 @@ static void encode_free_stateid(struct xdr_stream *xdr,
static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
- if (args->sa_session)
- return args->sa_session->clp->cl_mvops->minor_version;
+
+ if (args->sa_slot)
+ return args->sa_slot->table->session->clp->cl_mvops->minor_version;
#endif /* CONFIG_NFS_V4_1 */
return 0;
}
@@ -5509,12 +5509,13 @@ static int decode_sequence(struct xdr_stream *xdr,
struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
+ struct nfs4_session *session;
struct nfs4_sessionid id;
u32 dummy;
int status;
__be32 *p;
- if (!res->sr_session)
+ if (res->sr_slot == NULL)
return 0;
status = decode_op_hdr(xdr, OP_SEQUENCE);
@@ -5528,8 +5529,9 @@ static int decode_sequence(struct xdr_stream *xdr,
* sequence number, the server is looney tunes.
*/
status = -EREMOTEIO;
+ session = res->sr_slot->table->session;
- if (memcmp(id.data, res->sr_session->sess_id.data,
+ if (memcmp(id.data, session->sess_id.data,
NFS4_MAX_SESSIONID_LEN)) {
dprintk("%s Invalid session id\n", __func__);
goto out_err;
@@ -5547,14 +5549,14 @@ static int decode_sequence(struct xdr_stream *xdr,
}
/* slot id */
dummy = be32_to_cpup(p++);
- if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
+ if (dummy != res->sr_slot->slot_nr) {
dprintk("%s Invalid slot id\n", __func__);
goto out_err;
}
- /* highest slot id - currently not processed */
- dummy = be32_to_cpup(p++);
- /* target highest slot id - currently not processed */
- dummy = be32_to_cpup(p++);
+ /* highest slot id */
+ res->sr_highest_slotid = be32_to_cpup(p++);
+ /* target highest slot id */
+ res->sr_target_highest_slotid = be32_to_cpup(p++);
/* result flags */
res->sr_status_flags = be32_to_cpup(p);
status = 0;
diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c
index 874613545301..a9ebd817278b 100644
--- a/fs/nfs/objlayout/objlayout.c
+++ b/fs/nfs/objlayout/objlayout.c
@@ -148,17 +148,6 @@ end_offset(u64 start, u64 len)
return end >= start ? end : NFS4_MAX_UINT64;
}
-/* last octet in a range */
-static inline u64
-last_byte_offset(u64 start, u64 len)
-{
- u64 end;
-
- BUG_ON(!len);
- end = start + len;
- return end > start ? end - 1 : NFS4_MAX_UINT64;
-}
-
static void _fix_verify_io_params(struct pnfs_layout_segment *lseg,
struct page ***p_pages, unsigned *p_pgbase,
u64 offset, unsigned long count)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index fe624c91bd00..d00260b08103 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -254,7 +254,7 @@ static void
pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit)
{
lo->plh_retry_timestamp = jiffies;
- if (test_and_set_bit(fail_bit, &lo->plh_flags))
+ if (!test_and_set_bit(fail_bit, &lo->plh_flags))
atomic_inc(&lo->plh_refcount);
}
@@ -369,17 +369,6 @@ end_offset(u64 start, u64 len)
return end >= start ? end : NFS4_MAX_UINT64;
}
-/* last octet in a range */
-static inline u64
-last_byte_offset(u64 start, u64 len)
-{
- u64 end;
-
- BUG_ON(!len);
- end = start + len;
- return end > start ? end - 1 : NFS4_MAX_UINT64;
-}
-
/*
* is l2 fully contained in l1?
* start1 end1
@@ -645,7 +634,6 @@ send_layoutget(struct pnfs_layout_hdr *lo,
dprintk("--> %s\n", __func__);
- BUG_ON(ctx == NULL);
lgp = kzalloc(sizeof(*lgp), gfp_flags);
if (lgp == NULL)
return NULL;
@@ -925,8 +913,8 @@ pnfs_find_alloc_layout(struct inode *ino,
if (likely(nfsi->layout == NULL)) { /* Won the race? */
nfsi->layout = new;
return new;
- }
- pnfs_free_layout_hdr(new);
+ } else if (new != NULL)
+ pnfs_free_layout_hdr(new);
out_existing:
pnfs_get_layout_hdr(nfsi->layout);
return nfsi->layout;
@@ -1126,7 +1114,6 @@ pnfs_update_layout(struct inode *ino,
* chance of a CB_LAYOUTRECALL(FILE) coming in.
*/
spin_lock(&clp->cl_lock);
- BUG_ON(!list_empty(&lo->plh_layouts));
list_add_tail(&lo->plh_layouts, &server->layouts);
spin_unlock(&clp->cl_lock);
}
@@ -1222,7 +1209,7 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r
{
u64 rd_size = req->wb_bytes;
- BUG_ON(pgio->pg_lseg != NULL);
+ WARN_ON_ONCE(pgio->pg_lseg != NULL);
if (req->wb_offset != req->wb_pgbase) {
nfs_pageio_reset_read_mds(pgio);
@@ -1251,7 +1238,7 @@ void
pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req, u64 wb_size)
{
- BUG_ON(pgio->pg_lseg != NULL);
+ WARN_ON_ONCE(pgio->pg_lseg != NULL);
if (req->wb_offset != req->wb_pgbase) {
nfs_pageio_reset_write_mds(pgio);
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 50a88c3546ed..f084dac948e1 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -47,39 +47,6 @@
#define NFSDBG_FACILITY NFSDBG_PROC
/*
- * wrapper to handle the -EKEYEXPIRED error message. This should generally
- * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't
- * support the NFSERR_JUKEBOX error code, but we handle this situation in the
- * same way that we handle that error with NFSv3.
- */
-static int
-nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
-{
- int res;
- do {
- res = rpc_call_sync(clnt, msg, flags);
- if (res != -EKEYEXPIRED)
- break;
- freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
- res = -ERESTARTSYS;
- } while (!fatal_signal_pending(current));
- return res;
-}
-
-#define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags)
-
-static int
-nfs_async_handle_expired_key(struct rpc_task *task)
-{
- if (task->tk_status != -EKEYEXPIRED)
- return 0;
- task->tk_status = 0;
- rpc_restart_call(task);
- rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
- return 1;
-}
-
-/*
* Bare-bones access to getattr: this is for nfs_read_super.
*/
static int
@@ -364,8 +331,6 @@ static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlink
static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
- if (nfs_async_handle_expired_key(task))
- return 0;
nfs_mark_for_revalidate(dir);
return 1;
}
@@ -385,8 +350,6 @@ static int
nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
struct inode *new_dir)
{
- if (nfs_async_handle_expired_key(task))
- return 0;
nfs_mark_for_revalidate(old_dir);
nfs_mark_for_revalidate(new_dir);
return 1;
@@ -642,9 +605,6 @@ static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
struct inode *inode = data->header->inode;
- if (nfs_async_handle_expired_key(task))
- return -EAGAIN;
-
nfs_invalidate_atime(inode);
if (task->tk_status >= 0) {
nfs_refresh_inode(inode, data->res.fattr);
@@ -671,9 +631,6 @@ static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->header->inode;
- if (nfs_async_handle_expired_key(task))
- return -EAGAIN;
-
if (task->tk_status >= 0)
nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
return 0;
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index b6bdb18e892c..a5e5d9899d56 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -91,12 +91,16 @@ void nfs_readdata_release(struct nfs_read_data *rdata)
put_nfs_open_context(rdata->args.context);
if (rdata->pages.pagevec != rdata->pages.page_array)
kfree(rdata->pages.pagevec);
- if (rdata != &read_header->rpc_data)
- kfree(rdata);
- else
+ if (rdata == &read_header->rpc_data) {
rdata->header = NULL;
+ rdata = NULL;
+ }
if (atomic_dec_and_test(&hdr->refcnt))
hdr->completion_ops->completion(hdr);
+ /* Note: we only free the rpc_task after callbacks are done.
+ * See the comment in rpc_free_task() for why
+ */
+ kfree(rdata);
}
EXPORT_SYMBOL_GPL(nfs_readdata_release);
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index e831bce49766..2e7e8c878e5d 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -54,6 +54,7 @@
#include <linux/parser.h>
#include <linux/nsproxy.h>
#include <linux/rcupdate.h>
+#include <linux/kthread.h>
#include <asm/uaccess.h>
@@ -63,6 +64,7 @@
#include "iostat.h"
#include "internal.h"
#include "fscache.h"
+#include "nfs4session.h"
#include "pnfs.h"
#include "nfs.h"
@@ -306,6 +308,7 @@ const struct super_operations nfs_sops = {
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs_write_inode,
+ .drop_inode = nfs_drop_inode,
.put_super = nfs_put_super,
.statfs = nfs_statfs,
.evict_inode = nfs_evict_inode,
@@ -415,6 +418,54 @@ void nfs_sb_deactive(struct super_block *sb)
}
EXPORT_SYMBOL_GPL(nfs_sb_deactive);
+static int nfs_deactivate_super_async_work(void *ptr)
+{
+ struct super_block *sb = ptr;
+
+ deactivate_super(sb);
+ module_put_and_exit(0);
+ return 0;
+}
+
+/*
+ * same effect as deactivate_super, but will do final unmount in kthread
+ * context
+ */
+static void nfs_deactivate_super_async(struct super_block *sb)
+{
+ struct task_struct *task;
+ char buf[INET6_ADDRSTRLEN + 1];
+ struct nfs_server *server = NFS_SB(sb);
+ struct nfs_client *clp = server->nfs_client;
+
+ if (!atomic_add_unless(&sb->s_active, -1, 1)) {
+ rcu_read_lock();
+ snprintf(buf, sizeof(buf),
+ rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
+ rcu_read_unlock();
+
+ __module_get(THIS_MODULE);
+ task = kthread_run(nfs_deactivate_super_async_work, sb,
+ "%s-deactivate-super", buf);
+ if (IS_ERR(task)) {
+ pr_err("%s: kthread_run: %ld\n",
+ __func__, PTR_ERR(task));
+ /* make synchronous call and hope for the best */
+ deactivate_super(sb);
+ module_put(THIS_MODULE);
+ }
+ }
+}
+
+void nfs_sb_deactive_async(struct super_block *sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ if (atomic_dec_and_test(&server->active))
+ nfs_deactivate_super_async(sb);
+}
+EXPORT_SYMBOL_GPL(nfs_sb_deactive_async);
+
/*
* Deliver file system statistics to userspace
*/
@@ -771,7 +822,7 @@ int nfs_show_devname(struct seq_file *m, struct dentry *root)
int err = 0;
if (!page)
return -ENOMEM;
- devname = nfs_path(&dummy, root, page, PAGE_SIZE);
+ devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0);
if (IS_ERR(devname))
err = PTR_ERR(devname);
else
@@ -1101,7 +1152,7 @@ static int nfs_get_option_str(substring_t args[], char **option)
{
kfree(*option);
*option = match_strdup(args);
- return !option;
+ return !*option;
}
static int nfs_get_option_ul(substring_t args[], unsigned long *option)
@@ -2324,19 +2375,30 @@ static void nfs_get_cache_cookie(struct super_block *sb,
struct nfs_parsed_mount_data *parsed,
struct nfs_clone_mount *cloned)
{
+ struct nfs_server *nfss = NFS_SB(sb);
char *uniq = NULL;
int ulen = 0;
- if (parsed && parsed->fscache_uniq) {
- uniq = parsed->fscache_uniq;
- ulen = strlen(parsed->fscache_uniq);
+ nfss->fscache_key = NULL;
+ nfss->fscache = NULL;
+
+ if (parsed) {
+ if (!(parsed->options & NFS_OPTION_FSCACHE))
+ return;
+ if (parsed->fscache_uniq) {
+ uniq = parsed->fscache_uniq;
+ ulen = strlen(parsed->fscache_uniq);
+ }
} else if (cloned) {
struct nfs_server *mnt_s = NFS_SB(cloned->sb);
+ if (!(mnt_s->options & NFS_OPTION_FSCACHE))
+ return;
if (mnt_s->fscache_key) {
uniq = mnt_s->fscache_key->key.uniquifier;
ulen = mnt_s->fscache_key->key.uniq_len;
};
- }
+ } else
+ return;
nfs_fscache_get_super_cookie(sb, uniq, ulen);
}
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 13cea637eff8..3f79c77153b8 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -95,7 +95,7 @@ static void nfs_async_unlink_release(void *calldata)
nfs_dec_sillycount(data->dir);
nfs_free_unlinkdata(data);
- nfs_sb_deactive(sb);
+ nfs_sb_deactive_async(sb);
}
static void nfs_unlink_prepare(struct rpc_task *task, void *calldata)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 9347ab7c9574..c483cc50b82e 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -126,12 +126,16 @@ void nfs_writedata_release(struct nfs_write_data *wdata)
put_nfs_open_context(wdata->args.context);
if (wdata->pages.pagevec != wdata->pages.page_array)
kfree(wdata->pages.pagevec);
- if (wdata != &write_header->rpc_data)
- kfree(wdata);
- else
+ if (wdata == &write_header->rpc_data) {
wdata->header = NULL;
+ wdata = NULL;
+ }
if (atomic_dec_and_test(&hdr->refcnt))
hdr->completion_ops->completion(hdr);
+ /* Note: we only free the rpc_task after callbacks are done.
+ * See the comment in rpc_free_task() for why
+ */
+ kfree(wdata);
}
EXPORT_SYMBOL_GPL(nfs_writedata_release);
@@ -202,7 +206,6 @@ out:
/* A writeback failed: mark the page as bad, and invalidate the page cache */
static void nfs_set_pageerror(struct page *page)
{
- SetPageError(page);
nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page));
}
@@ -239,21 +242,18 @@ int nfs_congestion_kb;
#define NFS_CONGESTION_OFF_THRESH \
(NFS_CONGESTION_ON_THRESH - (NFS_CONGESTION_ON_THRESH >> 2))
-static int nfs_set_page_writeback(struct page *page)
+static void nfs_set_page_writeback(struct page *page)
{
+ struct nfs_server *nfss = NFS_SERVER(page_file_mapping(page)->host);
int ret = test_set_page_writeback(page);
- if (!ret) {
- struct inode *inode = page_file_mapping(page)->host;
- struct nfs_server *nfss = NFS_SERVER(inode);
+ WARN_ON_ONCE(ret != 0);
- if (atomic_long_inc_return(&nfss->writeback) >
- NFS_CONGESTION_ON_THRESH) {
- set_bdi_congested(&nfss->backing_dev_info,
- BLK_RW_ASYNC);
- }
+ if (atomic_long_inc_return(&nfss->writeback) >
+ NFS_CONGESTION_ON_THRESH) {
+ set_bdi_congested(&nfss->backing_dev_info,
+ BLK_RW_ASYNC);
}
- return ret;
}
static void nfs_end_page_writeback(struct page *page)
@@ -315,10 +315,10 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
if (IS_ERR(req))
goto out;
- ret = nfs_set_page_writeback(page);
- BUG_ON(ret != 0);
- BUG_ON(test_bit(PG_CLEAN, &req->wb_flags));
+ nfs_set_page_writeback(page);
+ WARN_ON_ONCE(test_bit(PG_CLEAN, &req->wb_flags));
+ ret = 0;
if (!nfs_pageio_add_request(pgio, req)) {
nfs_redirty_request(req);
ret = pgio->pg_error;
@@ -451,8 +451,6 @@ static void nfs_inode_remove_request(struct nfs_page *req)
struct inode *inode = req->wb_context->dentry->d_inode;
struct nfs_inode *nfsi = NFS_I(inode);
- BUG_ON (!NFS_WBACK_BUSY(req));
-
spin_lock(&inode->i_lock);
if (likely(!PageSwapCache(req->wb_page))) {
set_page_private(req->wb_page, 0);
@@ -884,7 +882,7 @@ static bool nfs_write_pageuptodate(struct page *page, struct inode *inode)
{
if (nfs_have_delegated_attributes(inode))
goto out;
- if (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE)
+ if (NFS_I(inode)->cache_validity & (NFS_INO_INVALID_DATA|NFS_INO_REVAL_PAGECACHE))
return false;
out:
return PageUptodate(page) != 0;
@@ -1727,7 +1725,6 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page)
struct nfs_page *req;
int ret = 0;
- BUG_ON(!PageLocked(page));
for (;;) {
wait_on_page_writeback(page);
req = nfs_page_find_request(page);
@@ -1801,7 +1798,8 @@ int nfs_migrate_page(struct address_space *mapping, struct page *newpage,
if (PagePrivate(page))
return -EBUSY;
- nfs_fscache_release_page(page, GFP_KERNEL);
+ if (!nfs_fscache_release_page(page, GFP_KERNEL))
+ return -EBUSY;
return migrate_page(mapping, newpage, page, mode);
}
@@ -1829,7 +1827,7 @@ int __init nfs_init_writepagecache(void)
goto out_destroy_write_mempool;
nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT,
- nfs_wdata_cachep);
+ nfs_cdata_cachep);
if (nfs_commit_mempool == NULL)
goto out_destroy_commit_cache;
diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
index e6c38159622f..e761ee95617f 100644
--- a/fs/nfsd/fault_inject.c
+++ b/fs/nfsd/fault_inject.c
@@ -8,61 +8,144 @@
#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/module.h>
+#include <linux/nsproxy.h>
+#include <linux/sunrpc/clnt.h>
+#include <asm/uaccess.h>
#include "state.h"
-#include "fault_inject.h"
+#include "netns.h"
struct nfsd_fault_inject_op {
char *file;
- void (*func)(u64);
+ u64 (*forget)(struct nfs4_client *, u64);
+ u64 (*print)(struct nfs4_client *, u64);
};
static struct nfsd_fault_inject_op inject_ops[] = {
{
.file = "forget_clients",
- .func = nfsd_forget_clients,
+ .forget = nfsd_forget_client,
+ .print = nfsd_print_client,
},
{
.file = "forget_locks",
- .func = nfsd_forget_locks,
+ .forget = nfsd_forget_client_locks,
+ .print = nfsd_print_client_locks,
},
{
.file = "forget_openowners",
- .func = nfsd_forget_openowners,
+ .forget = nfsd_forget_client_openowners,
+ .print = nfsd_print_client_openowners,
},
{
.file = "forget_delegations",
- .func = nfsd_forget_delegations,
+ .forget = nfsd_forget_client_delegations,
+ .print = nfsd_print_client_delegations,
},
{
.file = "recall_delegations",
- .func = nfsd_recall_delegations,
+ .forget = nfsd_recall_client_delegations,
+ .print = nfsd_print_client_delegations,
},
};
static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op);
static struct dentry *debug_dir;
-static int nfsd_inject_set(void *op_ptr, u64 val)
+static void nfsd_inject_set(struct nfsd_fault_inject_op *op, u64 val)
{
- struct nfsd_fault_inject_op *op = op_ptr;
+ u64 count = 0;
if (val == 0)
printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file);
else
printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val);
- op->func(val);
- return 0;
+ nfs4_lock_state();
+ count = nfsd_for_n_state(val, op->forget);
+ nfs4_unlock_state();
+ printk(KERN_INFO "NFSD: %s: found %llu", op->file, count);
}
-static int nfsd_inject_get(void *data, u64 *val)
+static void nfsd_inject_set_client(struct nfsd_fault_inject_op *op,
+ struct sockaddr_storage *addr,
+ size_t addr_size)
{
- *val = 0;
- return 0;
+ char buf[INET6_ADDRSTRLEN];
+ struct nfs4_client *clp;
+ u64 count;
+
+ nfs4_lock_state();
+ clp = nfsd_find_client(addr, addr_size);
+ if (clp) {
+ count = op->forget(clp, 0);
+ rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
+ printk(KERN_INFO "NFSD [%s]: Client %s had %llu state object(s)\n", op->file, buf, count);
+ }
+ nfs4_unlock_state();
+}
+
+static void nfsd_inject_get(struct nfsd_fault_inject_op *op, u64 *val)
+{
+ nfs4_lock_state();
+ *val = nfsd_for_n_state(0, op->print);
+ nfs4_unlock_state();
}
-DEFINE_SIMPLE_ATTRIBUTE(fops_nfsd, nfsd_inject_get, nfsd_inject_set, "%llu\n");
+static ssize_t fault_inject_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ static u64 val;
+ char read_buf[25];
+ size_t size, ret;
+ loff_t pos = *ppos;
+
+ if (!pos)
+ nfsd_inject_get(file->f_dentry->d_inode->i_private, &val);
+ size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val);
+
+ if (pos < 0)
+ return -EINVAL;
+ if (pos >= size || !len)
+ return 0;
+ if (len > size - pos)
+ len = size - pos;
+ ret = copy_to_user(buf, read_buf + pos, len);
+ if (ret == len)
+ return -EFAULT;
+ len -= ret;
+ *ppos = pos + len;
+ return len;
+}
+
+static ssize_t fault_inject_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ char write_buf[INET6_ADDRSTRLEN];
+ size_t size = min(sizeof(write_buf) - 1, len);
+ struct net *net = current->nsproxy->net_ns;
+ struct sockaddr_storage sa;
+ u64 val;
+
+ if (copy_from_user(write_buf, buf, size))
+ return -EFAULT;
+ write_buf[size] = '\0';
+
+ size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa));
+ if (size > 0)
+ nfsd_inject_set_client(file->f_dentry->d_inode->i_private, &sa, size);
+ else {
+ val = simple_strtoll(write_buf, NULL, 0);
+ nfsd_inject_set(file->f_dentry->d_inode->i_private, val);
+ }
+ return len; /* on success, claim we got the whole input */
+}
+
+static const struct file_operations fops_nfsd = {
+ .owner = THIS_MODULE,
+ .read = fault_inject_read,
+ .write = fault_inject_write,
+};
void nfsd_fault_inject_cleanup(void)
{
diff --git a/fs/nfsd/fault_inject.h b/fs/nfsd/fault_inject.h
deleted file mode 100644
index 90bd0570956c..000000000000
--- a/fs/nfsd/fault_inject.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
- *
- * Function definitions for fault injection
- */
-
-#ifndef LINUX_NFSD_FAULT_INJECT_H
-#define LINUX_NFSD_FAULT_INJECT_H
-
-#ifdef CONFIG_NFSD_FAULT_INJECTION
-int nfsd_fault_inject_init(void);
-void nfsd_fault_inject_cleanup(void);
-void nfsd_forget_clients(u64);
-void nfsd_forget_locks(u64);
-void nfsd_forget_openowners(u64);
-void nfsd_forget_delegations(u64);
-void nfsd_recall_delegations(u64);
-#else /* CONFIG_NFSD_FAULT_INJECTION */
-static inline int nfsd_fault_inject_init(void) { return 0; }
-static inline void nfsd_fault_inject_cleanup(void) {}
-static inline void nfsd_forget_clients(u64 num) {}
-static inline void nfsd_forget_locks(u64 num) {}
-static inline void nfsd_forget_openowners(u64 num) {}
-static inline void nfsd_forget_delegations(u64 num) {}
-static inline void nfsd_recall_delegations(u64 num) {}
-#endif /* CONFIG_NFSD_FAULT_INJECTION */
-
-#endif /* LINUX_NFSD_FAULT_INJECT_H */
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 65c2431ea32f..1051bebff1b0 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -24,7 +24,18 @@
#include <net/net_namespace.h>
#include <net/netns/generic.h>
+/* Hash tables for nfs4_clientid state */
+#define CLIENT_HASH_BITS 4
+#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
+#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
+
+#define LOCKOWNER_INO_HASH_BITS 8
+#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
+
+#define SESSION_HASH_SIZE 512
+
struct cld_net;
+struct nfsd4_client_tracking_ops;
struct nfsd_net {
struct cld_net *cld_net;
@@ -38,7 +49,62 @@ struct nfsd_net {
struct lock_manager nfsd4_manager;
bool grace_ended;
time_t boot_time;
+
+ /*
+ * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
+ * used in reboot/reset lease grace period processing
+ *
+ * conf_id_hashtbl[], and conf_name_tree hold confirmed
+ * setclientid_confirmed info.
+ *
+ * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
+ * setclientid info.
+ */
+ struct list_head *reclaim_str_hashtbl;
+ int reclaim_str_hashtbl_size;
+ struct list_head *conf_id_hashtbl;
+ struct rb_root conf_name_tree;
+ struct list_head *unconf_id_hashtbl;
+ struct rb_root unconf_name_tree;
+ struct list_head *ownerstr_hashtbl;
+ struct list_head *lockowner_ino_hashtbl;
+ struct list_head *sessionid_hashtbl;
+ /*
+ * client_lru holds client queue ordered by nfs4_client.cl_time
+ * for lease renewal.
+ *
+ * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
+ * for last close replay.
+ *
+ * All of the above fields are protected by the client_mutex.
+ */
+ struct list_head client_lru;
+ struct list_head close_lru;
+
+ struct delayed_work laundromat_work;
+
+ /* client_lock protects the client lru list and session hash table */
+ spinlock_t client_lock;
+
+ struct file *rec_file;
+ bool in_grace;
+ struct nfsd4_client_tracking_ops *client_tracking_ops;
+
+ time_t nfsd4_lease;
+ time_t nfsd4_grace;
+
+ bool nfsd_net_up;
+
+ /*
+ * Time of server startup
+ */
+ struct timeval nfssvc_boot;
+
+ struct svc_serv *nfsd_serv;
};
+/* Simple check to find out if a given net was properly initialized */
+#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
+
extern int nfsd_net_id;
#endif /* __NFSD_NETNS_H__ */
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index b314888825d5..9170861c804a 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -253,7 +253,7 @@ static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
(resp->mask & NFS_ACL) ? resp->acl_access : NULL,
(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
while (w > 0) {
- if (!rqstp->rq_respages[rqstp->rq_resused++])
+ if (!*(rqstp->rq_next_page++))
return 0;
w -= PAGE_SIZE;
}
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index a596e9d987e4..9cbc1a841f87 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -184,7 +184,7 @@ static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
(resp->mask & NFS_ACL) ? resp->acl_access : NULL,
(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
while (w > 0) {
- if (!rqstp->rq_respages[rqstp->rq_resused++])
+ if (!*(rqstp->rq_next_page++))
return 0;
w -= PAGE_SIZE;
}
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 97d90d1c8608..1fc02dfdc5c4 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -460,7 +460,7 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
__be32 nfserr;
int count = 0;
loff_t offset;
- int i;
+ struct page **p;
caddr_t page_addr = NULL;
dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
@@ -484,8 +484,8 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
&resp->common,
nfs3svc_encode_entry_plus);
memcpy(resp->verf, argp->verf, 8);
- for (i=1; i<rqstp->rq_resused ; i++) {
- page_addr = page_address(rqstp->rq_respages[i]);
+ for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
+ page_addr = page_address(*p);
if (((caddr_t)resp->buffer >= page_addr) &&
((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 43f46cd9edea..324c0baf7cda 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -7,8 +7,10 @@
*/
#include <linux/namei.h>
+#include <linux/sunrpc/svc_xprt.h>
#include "xdr3.h"
#include "auth.h"
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_XDR
@@ -323,7 +325,7 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_readargs *args)
{
unsigned int len;
- int v,pn;
+ int v;
u32 max_blocksize = svc_max_payload(rqstp);
if (!(p = decode_fh(p, &args->fh)))
@@ -338,8 +340,9 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
/* set up the kvec */
v=0;
while (len > 0) {
- pn = rqstp->rq_resused++;
- rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
+ struct page *p = *(rqstp->rq_next_page++);
+
+ rqstp->rq_vec[v].iov_base = page_address(p);
rqstp->rq_vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE;
len -= rqstp->rq_vec[v].iov_len;
v++;
@@ -461,8 +464,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
len = ntohl(*p++);
if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
return 0;
- args->tname = new =
- page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+ args->tname = new = page_address(*(rqstp->rq_next_page++));
args->tlen = len;
/* first copy and check from the first page */
old = (char*)p;
@@ -533,8 +535,7 @@ nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
{
if (!(p = decode_fh(p, &args->fh)))
return 0;
- args->buffer =
- page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+ args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
}
@@ -565,8 +566,7 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
if (args->count > PAGE_SIZE)
args->count = PAGE_SIZE;
- args->buffer =
- page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+ args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
}
@@ -575,7 +575,7 @@ int
nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_readdirargs *args)
{
- int len, pn;
+ int len;
u32 max_blocksize = svc_max_payload(rqstp);
if (!(p = decode_fh(p, &args->fh)))
@@ -590,9 +590,9 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
args->count = len;
while (len > 0) {
- pn = rqstp->rq_resused++;
+ struct page *p = *(rqstp->rq_next_page++);
if (!args->buffer)
- args->buffer = page_address(rqstp->rq_respages[pn]);
+ args->buffer = page_address(p);
len -= PAGE_SIZE;
}
@@ -720,12 +720,14 @@ int
nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_writeres *resp)
{
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
p = encode_wcc_data(rqstp, p, &resp->fh);
if (resp->status == 0) {
*p++ = htonl(resp->count);
*p++ = htonl(resp->committed);
- *p++ = htonl(nfssvc_boot.tv_sec);
- *p++ = htonl(nfssvc_boot.tv_usec);
+ *p++ = htonl(nn->nfssvc_boot.tv_sec);
+ *p++ = htonl(nn->nfssvc_boot.tv_usec);
}
return xdr_ressize_check(rqstp, p);
}
@@ -876,7 +878,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
common);
__be32 *p = cd->buffer;
caddr_t curr_page_addr = NULL;
- int pn; /* current page number */
+ struct page ** page;
int slen; /* string (name) length */
int elen; /* estimated entry length in words */
int num_entry_words = 0; /* actual number of words */
@@ -913,8 +915,9 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
}
/* determine which page in rq_respages[] we are currently filling */
- for (pn=1; pn < cd->rqstp->rq_resused; pn++) {
- curr_page_addr = page_address(cd->rqstp->rq_respages[pn]);
+ for (page = cd->rqstp->rq_respages + 1;
+ page < cd->rqstp->rq_next_page; page++) {
+ curr_page_addr = page_address(*page);
if (((caddr_t)cd->buffer >= curr_page_addr) &&
((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
@@ -929,14 +932,14 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
if (plus)
p = encode_entryplus_baggage(cd, p, name, namlen);
num_entry_words = p - cd->buffer;
- } else if (cd->rqstp->rq_respages[pn+1] != NULL) {
+ } else if (*(page+1) != NULL) {
/* temporarily encode entry into next page, then move back to
* current and next page in rq_respages[] */
__be32 *p1, *tmp;
int len1, len2;
/* grab next page for temporary storage of entry */
- p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]);
+ p1 = tmp = page_address(*(page+1));
p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
@@ -1082,11 +1085,13 @@ int
nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_commitres *resp)
{
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
p = encode_wcc_data(rqstp, p, &resp->fh);
/* Write verifier */
if (resp->status == 0) {
- *p++ = htonl(nfssvc_boot.tv_sec);
- *p++ = htonl(nfssvc_boot.tv_usec);
+ *p++ = htonl(nn->nfssvc_boot.tv_sec);
+ *p++ = htonl(nn->nfssvc_boot.tv_usec);
}
return xdr_ressize_check(rqstp, p);
}
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index bdf29c96e4cd..99bc85ff0217 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -36,6 +36,7 @@
#include <linux/slab.h>
#include "nfsd.h"
#include "state.h"
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
@@ -625,20 +626,46 @@ static const struct rpc_program cb_program = {
.pipe_dir_name = "nfsd4_cb",
};
-static int max_cb_time(void)
+static int max_cb_time(struct net *net)
{
- return max(nfsd4_lease/10, (time_t)1) * HZ;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ return max(nn->nfsd4_lease/10, (time_t)1) * HZ;
}
+static struct rpc_cred *callback_cred;
+
+int set_callback_cred(void)
+{
+ if (callback_cred)
+ return 0;
+ callback_cred = rpc_lookup_machine_cred("nfs");
+ if (!callback_cred)
+ return -ENOMEM;
+ return 0;
+}
+
+static struct rpc_cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, struct nfsd4_session *ses)
+{
+ if (clp->cl_minorversion == 0) {
+ return get_rpccred(callback_cred);
+ } else {
+ struct rpc_auth *auth = client->cl_auth;
+ struct auth_cred acred = {};
+
+ acred.uid = ses->se_cb_sec.uid;
+ acred.gid = ses->se_cb_sec.gid;
+ return auth->au_ops->lookup_cred(client->cl_auth, &acred, 0);
+ }
+}
static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_session *ses)
{
struct rpc_timeout timeparms = {
- .to_initval = max_cb_time(),
+ .to_initval = max_cb_time(clp->net),
.to_retries = 0,
};
struct rpc_create_args args = {
- .net = &init_net,
+ .net = clp->net,
.address = (struct sockaddr *) &conn->cb_addr,
.addrsize = conn->cb_addrlen,
.saddress = (struct sockaddr *) &conn->cb_saddr,
@@ -648,6 +675,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
};
struct rpc_clnt *client;
+ struct rpc_cred *cred;
if (clp->cl_minorversion == 0) {
if (!clp->cl_cred.cr_principal &&
@@ -666,7 +694,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
args.bc_xprt = conn->cb_xprt;
args.prognumber = clp->cl_cb_session->se_cb_prog;
args.protocol = XPRT_TRANSPORT_BC_TCP;
- args.authflavor = RPC_AUTH_UNIX;
+ args.authflavor = ses->se_cb_sec.flavor;
}
/* Create RPC client */
client = rpc_create(&args);
@@ -675,9 +703,14 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
PTR_ERR(client));
return PTR_ERR(client);
}
+ cred = get_backchannel_cred(clp, client, ses);
+ if (IS_ERR(cred)) {
+ rpc_shutdown_client(client);
+ return PTR_ERR(cred);
+ }
clp->cl_cb_client = client;
+ clp->cl_cb_cred = cred;
return 0;
-
}
static void warn_no_callback_path(struct nfs4_client *clp, int reason)
@@ -714,18 +747,6 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = {
.rpc_call_done = nfsd4_cb_probe_done,
};
-static struct rpc_cred *callback_cred;
-
-int set_callback_cred(void)
-{
- if (callback_cred)
- return 0;
- callback_cred = rpc_lookup_machine_cred("nfs");
- if (!callback_cred)
- return -ENOMEM;
- return 0;
-}
-
static struct workqueue_struct *callback_wq;
static void run_nfsd4_cb(struct nfsd4_callback *cb)
@@ -743,7 +764,6 @@ static void do_probe_callback(struct nfs4_client *clp)
cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL];
cb->cb_msg.rpc_argp = NULL;
cb->cb_msg.rpc_resp = NULL;
- cb->cb_msg.rpc_cred = callback_cred;
cb->cb_ops = &nfsd4_cb_probe_ops;
@@ -962,6 +982,8 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
if (clp->cl_cb_client) {
rpc_shutdown_client(clp->cl_cb_client);
clp->cl_cb_client = NULL;
+ put_rpccred(clp->cl_cb_cred);
+ clp->cl_cb_cred = NULL;
}
if (clp->cl_cb_conn.cb_xprt) {
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
@@ -995,7 +1017,7 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
run_nfsd4_cb(cb);
}
-void nfsd4_do_callback_rpc(struct work_struct *w)
+static void nfsd4_do_callback_rpc(struct work_struct *w)
{
struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback, cb_work);
struct nfs4_client *clp = cb->cb_clp;
@@ -1010,10 +1032,16 @@ void nfsd4_do_callback_rpc(struct work_struct *w)
nfsd4_release_cb(cb);
return;
}
+ cb->cb_msg.rpc_cred = clp->cl_cb_cred;
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
cb->cb_ops, cb);
}
+void nfsd4_init_callback(struct nfsd4_callback *cb)
+{
+ INIT_WORK(&cb->cb_work, nfsd4_do_callback_rpc);
+}
+
void nfsd4_cb_recall(struct nfs4_delegation *dp)
{
struct nfsd4_callback *cb = &dp->dl_recall;
@@ -1025,7 +1053,6 @@ void nfsd4_cb_recall(struct nfs4_delegation *dp)
cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL];
cb->cb_msg.rpc_argp = cb;
cb->cb_msg.rpc_resp = cb;
- cb->cb_msg.rpc_cred = callback_cred;
cb->cb_ops = &nfsd4_cb_recall_ops;
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 6c9a4b291dba..9d1c5dba2bbb 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -40,6 +40,7 @@
#include "xdr4.h"
#include "vfs.h"
#include "current_stateid.h"
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
@@ -194,6 +195,7 @@ static __be32
do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
{
struct svc_fh *resfh;
+ int accmode;
__be32 status;
resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
@@ -253,9 +255,10 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o
/* set reply cache */
fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
&resfh->fh_handle);
- if (!open->op_created)
- status = do_open_permission(rqstp, resfh, open,
- NFSD_MAY_NOP);
+ accmode = NFSD_MAY_NOP;
+ if (open->op_created)
+ accmode |= NFSD_MAY_OWNER_OVERRIDE;
+ status = do_open_permission(rqstp, resfh, open, accmode);
set_change_info(&open->op_cinfo, current_fh);
fh_dup2(current_fh, resfh);
out:
@@ -304,6 +307,8 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
{
__be32 status;
struct nfsd4_compoundres *resp;
+ struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
(int)open->op_fname.len, open->op_fname.data,
@@ -331,7 +336,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
/* check seqid for replay. set nfs4_owner */
resp = rqstp->rq_resp;
- status = nfsd4_process_open1(&resp->cstate, open);
+ status = nfsd4_process_open1(&resp->cstate, open, nn);
if (status == nfserr_replay_me) {
struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
fh_put(&cstate->current_fh);
@@ -354,10 +359,10 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
/* Openowner is now set, so sequence id will get bumped. Now we need
* these checks before we do any creates: */
status = nfserr_grace;
- if (locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
+ if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
goto out;
status = nfserr_no_grace;
- if (!locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
+ if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
goto out;
switch (open->op_claim_type) {
@@ -370,7 +375,9 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
- status = nfs4_check_open_reclaim(&open->op_clientid, cstate->minorversion);
+ status = nfs4_check_open_reclaim(&open->op_clientid,
+ cstate->minorversion,
+ nn);
if (status)
goto out;
case NFS4_OPEN_CLAIM_FH:
@@ -490,12 +497,13 @@ nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
&access->ac_supported);
}
-static void gen_boot_verifier(nfs4_verifier *verifier)
+static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
{
__be32 verf[2];
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- verf[0] = (__be32)nfssvc_boot.tv_sec;
- verf[1] = (__be32)nfssvc_boot.tv_usec;
+ verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
+ verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
memcpy(verifier->data, verf, sizeof(verifier->data));
}
@@ -503,7 +511,7 @@ static __be32
nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_commit *commit)
{
- gen_boot_verifier(&commit->co_verf);
+ gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
commit->co_count);
}
@@ -684,6 +692,17 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (read->rd_offset >= OFFSET_MAX)
return nfserr_inval;
+ /*
+ * If we do a zero copy read, then a client will see read data
+ * that reflects the state of the file *after* performing the
+ * following compound.
+ *
+ * To ensure proper ordering, we therefore turn off zero copy if
+ * the client wants us to do more in this compound:
+ */
+ if (!nfsd4_last_compound_op(rqstp))
+ rqstp->rq_splice_ok = false;
+
nfs4_lock_state();
/* check stateid */
if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
@@ -876,6 +895,24 @@ out:
return status;
}
+static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
+{
+ int i = 1;
+ int buflen = write->wr_buflen;
+
+ vec[0].iov_base = write->wr_head.iov_base;
+ vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
+ buflen -= vec[0].iov_len;
+
+ while (buflen) {
+ vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
+ vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
+ buflen -= vec[i].iov_len;
+ i++;
+ }
+ return i;
+}
+
static __be32
nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_write *write)
@@ -884,6 +921,7 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct file *filp = NULL;
__be32 status = nfs_ok;
unsigned long cnt;
+ int nvecs;
/* no need to check permission - this will be done in nfsd_write() */
@@ -904,10 +942,13 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
cnt = write->wr_buflen;
write->wr_how_written = write->wr_stable_how;
- gen_boot_verifier(&write->wr_verifier);
+ gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
+
+ nvecs = fill_in_write_vector(rqstp->rq_vec, write);
+ WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
status = nfsd_write(rqstp, &cstate->current_fh, filp,
- write->wr_offset, rqstp->rq_vec, write->wr_vlen,
+ write->wr_offset, rqstp->rq_vec, nvecs,
&cnt, &write->wr_how_written);
if (filp)
fput(filp);
@@ -1666,6 +1707,12 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_name = "OP_EXCHANGE_ID",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
},
+ [OP_BACKCHANNEL_CTL] = {
+ .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
+ .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_BACKCHANNEL_CTL",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
+ },
[OP_BIND_CONN_TO_SESSION] = {
.op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
@@ -1719,6 +1766,7 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_func = (nfsd4op_func)nfsd4_free_stateid,
.op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
.op_name = "OP_FREE_STATEID",
+ .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
};
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 43295d45cc2b..ba6fdd4a0455 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -58,13 +58,11 @@ struct nfsd4_client_tracking_ops {
void (*create)(struct nfs4_client *);
void (*remove)(struct nfs4_client *);
int (*check)(struct nfs4_client *);
- void (*grace_done)(struct net *, time_t);
+ void (*grace_done)(struct nfsd_net *, time_t);
};
/* Globals */
-static struct file *rec_file;
static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
-static struct nfsd4_client_tracking_ops *client_tracking_ops;
static int
nfs4_save_creds(const struct cred **original_creds)
@@ -102,33 +100,39 @@ md5_to_hex(char *out, char *md5)
*out = '\0';
}
-__be32
-nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname)
+static int
+nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname)
{
struct xdr_netobj cksum;
struct hash_desc desc;
struct scatterlist sg;
- __be32 status = nfserr_jukebox;
+ int status;
dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n",
clname->len, clname->data);
desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
desc.tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(desc.tfm))
+ if (IS_ERR(desc.tfm)) {
+ status = PTR_ERR(desc.tfm);
goto out_no_tfm;
+ }
+
cksum.len = crypto_hash_digestsize(desc.tfm);
cksum.data = kmalloc(cksum.len, GFP_KERNEL);
- if (cksum.data == NULL)
+ if (cksum.data == NULL) {
+ status = -ENOMEM;
goto out;
+ }
sg_init_one(&sg, clname->data, clname->len);
- if (crypto_hash_digest(&desc, &sg, sg.length, cksum.data))
+ status = crypto_hash_digest(&desc, &sg, sg.length, cksum.data);
+ if (status)
goto out;
md5_to_hex(dname, cksum.data);
- status = nfs_ok;
+ status = 0;
out:
kfree(cksum.data);
crypto_free_hash(desc.tfm);
@@ -136,29 +140,61 @@ out_no_tfm:
return status;
}
+/*
+ * If we had an error generating the recdir name for the legacy tracker
+ * then warn the admin. If the error doesn't appear to be transient,
+ * then disable recovery tracking.
+ */
+static void
+legacy_recdir_name_error(int error)
+{
+ printk(KERN_ERR "NFSD: unable to generate recoverydir "
+ "name (%d).\n", error);
+
+ /*
+ * if the algorithm just doesn't exist, then disable the recovery
+ * tracker altogether. The crypto libs will generally return this if
+ * FIPS is enabled as well.
+ */
+ if (error == -ENOENT) {
+ printk(KERN_ERR "NFSD: disabling legacy clientid tracking. "
+ "Reboot recovery will not function correctly!\n");
+
+ /* the argument is ignored by the legacy exit function */
+ nfsd4_client_tracking_exit(NULL);
+ }
+}
+
static void
nfsd4_create_clid_dir(struct nfs4_client *clp)
{
const struct cred *original_cred;
- char *dname = clp->cl_recdir;
+ char dname[HEXDIR_LEN];
struct dentry *dir, *dentry;
+ struct nfs4_client_reclaim *crp;
int status;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname);
if (test_and_set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
return;
- if (!rec_file)
+ if (!nn->rec_file)
return;
+
+ status = nfs4_make_rec_clidname(dname, &clp->cl_name);
+ if (status)
+ return legacy_recdir_name_error(status);
+
status = nfs4_save_creds(&original_cred);
if (status < 0)
return;
- status = mnt_want_write_file(rec_file);
+ status = mnt_want_write_file(nn->rec_file);
if (status)
return;
- dir = rec_file->f_path.dentry;
+ dir = nn->rec_file->f_path.dentry;
/* lock the parent */
mutex_lock(&dir->d_inode->i_mutex);
@@ -182,18 +218,24 @@ out_put:
dput(dentry);
out_unlock:
mutex_unlock(&dir->d_inode->i_mutex);
- if (status == 0)
- vfs_fsync(rec_file, 0);
- else
+ if (status == 0) {
+ if (nn->in_grace) {
+ crp = nfs4_client_to_reclaim(dname, nn);
+ if (crp)
+ crp->cr_clp = clp;
+ }
+ vfs_fsync(nn->rec_file, 0);
+ } else {
printk(KERN_ERR "NFSD: failed to write recovery record"
" (err %d); please check that %s exists"
" and is writeable", status,
user_recovery_dirname);
- mnt_drop_write_file(rec_file);
+ }
+ mnt_drop_write_file(nn->rec_file);
nfs4_reset_creds(original_cred);
}
-typedef int (recdir_func)(struct dentry *, struct dentry *);
+typedef int (recdir_func)(struct dentry *, struct dentry *, struct nfsd_net *);
struct name_list {
char name[HEXDIR_LEN];
@@ -219,10 +261,10 @@ nfsd4_build_namelist(void *arg, const char *name, int namlen,
}
static int
-nfsd4_list_rec_dir(recdir_func *f)
+nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn)
{
const struct cred *original_cred;
- struct dentry *dir = rec_file->f_path.dentry;
+ struct dentry *dir = nn->rec_file->f_path.dentry;
LIST_HEAD(names);
int status;
@@ -230,13 +272,13 @@ nfsd4_list_rec_dir(recdir_func *f)
if (status < 0)
return status;
- status = vfs_llseek(rec_file, 0, SEEK_SET);
+ status = vfs_llseek(nn->rec_file, 0, SEEK_SET);
if (status < 0) {
nfs4_reset_creds(original_cred);
return status;
}
- status = vfs_readdir(rec_file, nfsd4_build_namelist, &names);
+ status = vfs_readdir(nn->rec_file, nfsd4_build_namelist, &names);
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
while (!list_empty(&names)) {
struct name_list *entry;
@@ -248,7 +290,7 @@ nfsd4_list_rec_dir(recdir_func *f)
status = PTR_ERR(dentry);
break;
}
- status = f(dir, dentry);
+ status = f(dir, dentry, nn);
dput(dentry);
}
list_del(&entry->list);
@@ -260,14 +302,14 @@ nfsd4_list_rec_dir(recdir_func *f)
}
static int
-nfsd4_unlink_clid_dir(char *name, int namlen)
+nfsd4_unlink_clid_dir(char *name, int namlen, struct nfsd_net *nn)
{
struct dentry *dir, *dentry;
int status;
dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
- dir = rec_file->f_path.dentry;
+ dir = nn->rec_file->f_path.dentry;
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
dentry = lookup_one_len(name, dir, namlen);
if (IS_ERR(dentry)) {
@@ -289,37 +331,52 @@ static void
nfsd4_remove_clid_dir(struct nfs4_client *clp)
{
const struct cred *original_cred;
+ struct nfs4_client_reclaim *crp;
+ char dname[HEXDIR_LEN];
int status;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
- if (!rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
+ if (!nn->rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
return;
- status = mnt_want_write_file(rec_file);
+ status = nfs4_make_rec_clidname(dname, &clp->cl_name);
+ if (status)
+ return legacy_recdir_name_error(status);
+
+ status = mnt_want_write_file(nn->rec_file);
if (status)
goto out;
clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
status = nfs4_save_creds(&original_cred);
if (status < 0)
- goto out;
+ goto out_drop_write;
- status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
+ status = nfsd4_unlink_clid_dir(dname, HEXDIR_LEN-1, nn);
nfs4_reset_creds(original_cred);
- if (status == 0)
- vfs_fsync(rec_file, 0);
- mnt_drop_write_file(rec_file);
+ if (status == 0) {
+ vfs_fsync(nn->rec_file, 0);
+ if (nn->in_grace) {
+ /* remove reclaim record */
+ crp = nfsd4_find_reclaim_client(dname, nn);
+ if (crp)
+ nfs4_remove_reclaim_record(crp, nn);
+ }
+ }
+out_drop_write:
+ mnt_drop_write_file(nn->rec_file);
out:
if (status)
printk("NFSD: Failed to remove expired client state directory"
- " %.*s\n", HEXDIR_LEN, clp->cl_recdir);
+ " %.*s\n", HEXDIR_LEN, dname);
}
static int
-purge_old(struct dentry *parent, struct dentry *child)
+purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
{
int status;
- if (nfs4_has_reclaimed_state(child->d_name.name, false))
+ if (nfs4_has_reclaimed_state(child->d_name.name, nn))
return 0;
status = vfs_rmdir(parent->d_inode, child);
@@ -331,27 +388,29 @@ purge_old(struct dentry *parent, struct dentry *child)
}
static void
-nfsd4_recdir_purge_old(struct net *net, time_t boot_time)
+nfsd4_recdir_purge_old(struct nfsd_net *nn, time_t boot_time)
{
int status;
- if (!rec_file)
+ nn->in_grace = false;
+ if (!nn->rec_file)
return;
- status = mnt_want_write_file(rec_file);
+ status = mnt_want_write_file(nn->rec_file);
if (status)
goto out;
- status = nfsd4_list_rec_dir(purge_old);
+ status = nfsd4_list_rec_dir(purge_old, nn);
if (status == 0)
- vfs_fsync(rec_file, 0);
- mnt_drop_write_file(rec_file);
+ vfs_fsync(nn->rec_file, 0);
+ mnt_drop_write_file(nn->rec_file);
out:
+ nfs4_release_reclaim(nn);
if (status)
printk("nfsd4: failed to purge old clients from recovery"
- " directory %s\n", rec_file->f_path.dentry->d_name.name);
+ " directory %s\n", nn->rec_file->f_path.dentry->d_name.name);
}
static int
-load_recdir(struct dentry *parent, struct dentry *child)
+load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
{
if (child->d_name.len != HEXDIR_LEN - 1) {
printk("nfsd4: illegal name %s in recovery directory\n",
@@ -359,21 +418,22 @@ load_recdir(struct dentry *parent, struct dentry *child)
/* Keep trying; maybe the others are OK: */
return 0;
}
- nfs4_client_to_reclaim(child->d_name.name);
+ nfs4_client_to_reclaim(child->d_name.name, nn);
return 0;
}
static int
-nfsd4_recdir_load(void) {
+nfsd4_recdir_load(struct net *net) {
int status;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- if (!rec_file)
+ if (!nn->rec_file)
return 0;
- status = nfsd4_list_rec_dir(load_recdir);
+ status = nfsd4_list_rec_dir(load_recdir, nn);
if (status)
printk("nfsd4: failed loading clients from recovery"
- " directory %s\n", rec_file->f_path.dentry->d_name.name);
+ " directory %s\n", nn->rec_file->f_path.dentry->d_name.name);
return status;
}
@@ -382,15 +442,16 @@ nfsd4_recdir_load(void) {
*/
static int
-nfsd4_init_recdir(void)
+nfsd4_init_recdir(struct net *net)
{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
const struct cred *original_cred;
int status;
printk("NFSD: Using %s as the NFSv4 state recovery directory\n",
user_recovery_dirname);
- BUG_ON(rec_file);
+ BUG_ON(nn->rec_file);
status = nfs4_save_creds(&original_cred);
if (status < 0) {
@@ -400,23 +461,65 @@ nfsd4_init_recdir(void)
return status;
}
- rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0);
- if (IS_ERR(rec_file)) {
+ nn->rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0);
+ if (IS_ERR(nn->rec_file)) {
printk("NFSD: unable to find recovery directory %s\n",
user_recovery_dirname);
- status = PTR_ERR(rec_file);
- rec_file = NULL;
+ status = PTR_ERR(nn->rec_file);
+ nn->rec_file = NULL;
}
nfs4_reset_creds(original_cred);
+ if (!status)
+ nn->in_grace = true;
return status;
}
+
+static int
+nfs4_legacy_state_init(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ int i;
+
+ nn->reclaim_str_hashtbl = kmalloc(sizeof(struct list_head) *
+ CLIENT_HASH_SIZE, GFP_KERNEL);
+ if (!nn->reclaim_str_hashtbl)
+ return -ENOMEM;
+
+ for (i = 0; i < CLIENT_HASH_SIZE; i++)
+ INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]);
+ nn->reclaim_str_hashtbl_size = 0;
+
+ return 0;
+}
+
+static void
+nfs4_legacy_state_shutdown(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ kfree(nn->reclaim_str_hashtbl);
+}
+
static int
nfsd4_load_reboot_recovery_data(struct net *net)
{
int status;
+ status = nfsd4_init_recdir(net);
+ if (!status)
+ status = nfsd4_recdir_load(net);
+ if (status)
+ printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n");
+ return status;
+}
+
+static int
+nfsd4_legacy_tracking_init(struct net *net)
+{
+ int status;
+
/* XXX: The legacy code won't work in a container */
if (net != &init_net) {
WARN(1, KERN_ERR "NFSD: attempt to initialize legacy client "
@@ -424,30 +527,37 @@ nfsd4_load_reboot_recovery_data(struct net *net)
return -EINVAL;
}
- nfs4_lock_state();
- status = nfsd4_init_recdir();
- if (!status)
- status = nfsd4_recdir_load();
- nfs4_unlock_state();
+ status = nfs4_legacy_state_init(net);
if (status)
- printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n");
+ return status;
+
+ status = nfsd4_load_reboot_recovery_data(net);
+ if (status)
+ goto err;
+ return 0;
+
+err:
+ nfs4_legacy_state_shutdown(net);
return status;
}
static void
-nfsd4_shutdown_recdir(void)
+nfsd4_shutdown_recdir(struct nfsd_net *nn)
{
- if (!rec_file)
+ if (!nn->rec_file)
return;
- fput(rec_file);
- rec_file = NULL;
+ fput(nn->rec_file);
+ nn->rec_file = NULL;
}
static void
nfsd4_legacy_tracking_exit(struct net *net)
{
- nfs4_release_reclaim();
- nfsd4_shutdown_recdir();
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ nfs4_release_reclaim(nn);
+ nfsd4_shutdown_recdir(nn);
+ nfs4_legacy_state_shutdown(net);
}
/*
@@ -480,13 +590,26 @@ nfs4_recoverydir(void)
static int
nfsd4_check_legacy_client(struct nfs4_client *clp)
{
+ int status;
+ char dname[HEXDIR_LEN];
+ struct nfs4_client_reclaim *crp;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
/* did we already find that this client is stable? */
if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
return 0;
+ status = nfs4_make_rec_clidname(dname, &clp->cl_name);
+ if (status) {
+ legacy_recdir_name_error(status);
+ return status;
+ }
+
/* look for it in the reclaim hashtable otherwise */
- if (nfsd4_find_reclaim_client(clp)) {
+ crp = nfsd4_find_reclaim_client(dname, nn);
+ if (crp) {
set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
+ crp->cr_clp = clp;
return 0;
}
@@ -494,7 +617,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp)
}
static struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = {
- .init = nfsd4_load_reboot_recovery_data,
+ .init = nfsd4_legacy_tracking_init,
.exit = nfsd4_legacy_tracking_exit,
.create = nfsd4_create_clid_dir,
.remove = nfsd4_remove_clid_dir,
@@ -785,8 +908,7 @@ nfsd4_cld_create(struct nfs4_client *clp)
{
int ret;
struct cld_upcall *cup;
- /* FIXME: determine net from clp */
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct cld_net *cn = nn->cld_net;
/* Don't upcall if it's already stored */
@@ -823,8 +945,7 @@ nfsd4_cld_remove(struct nfs4_client *clp)
{
int ret;
struct cld_upcall *cup;
- /* FIXME: determine net from clp */
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct cld_net *cn = nn->cld_net;
/* Don't upcall if it's already removed */
@@ -861,8 +982,7 @@ nfsd4_cld_check(struct nfs4_client *clp)
{
int ret;
struct cld_upcall *cup;
- /* FIXME: determine net from clp */
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
struct cld_net *cn = nn->cld_net;
/* Don't upcall if one was already stored during this grace pd */
@@ -892,11 +1012,10 @@ nfsd4_cld_check(struct nfs4_client *clp)
}
static void
-nfsd4_cld_grace_done(struct net *net, time_t boot_time)
+nfsd4_cld_grace_done(struct nfsd_net *nn, time_t boot_time)
{
int ret;
struct cld_upcall *cup;
- struct nfsd_net *nn = net_generic(net, nfsd_net_id);
struct cld_net *cn = nn->cld_net;
cup = alloc_cld_upcall(cn);
@@ -926,28 +1045,261 @@ static struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = {
.grace_done = nfsd4_cld_grace_done,
};
+/* upcall via usermodehelper */
+static char cltrack_prog[PATH_MAX] = "/sbin/nfsdcltrack";
+module_param_string(cltrack_prog, cltrack_prog, sizeof(cltrack_prog),
+ S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(cltrack_prog, "Path to the nfsdcltrack upcall program");
+
+static bool cltrack_legacy_disable;
+module_param(cltrack_legacy_disable, bool, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(cltrack_legacy_disable,
+ "Disable legacy recoverydir conversion. Default: false");
+
+#define LEGACY_TOPDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_TOPDIR="
+#define LEGACY_RECDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_RECDIR="
+
+static char *
+nfsd4_cltrack_legacy_topdir(void)
+{
+ int copied;
+ size_t len;
+ char *result;
+
+ if (cltrack_legacy_disable)
+ return NULL;
+
+ len = strlen(LEGACY_TOPDIR_ENV_PREFIX) +
+ strlen(nfs4_recoverydir()) + 1;
+
+ result = kmalloc(len, GFP_KERNEL);
+ if (!result)
+ return result;
+
+ copied = snprintf(result, len, LEGACY_TOPDIR_ENV_PREFIX "%s",
+ nfs4_recoverydir());
+ if (copied >= len) {
+ /* just return nothing if output was truncated */
+ kfree(result);
+ return NULL;
+ }
+
+ return result;
+}
+
+static char *
+nfsd4_cltrack_legacy_recdir(const struct xdr_netobj *name)
+{
+ int copied;
+ size_t len;
+ char *result;
+
+ if (cltrack_legacy_disable)
+ return NULL;
+
+ /* +1 is for '/' between "topdir" and "recdir" */
+ len = strlen(LEGACY_RECDIR_ENV_PREFIX) +
+ strlen(nfs4_recoverydir()) + 1 + HEXDIR_LEN;
+
+ result = kmalloc(len, GFP_KERNEL);
+ if (!result)
+ return result;
+
+ copied = snprintf(result, len, LEGACY_RECDIR_ENV_PREFIX "%s/",
+ nfs4_recoverydir());
+ if (copied > (len - HEXDIR_LEN)) {
+ /* just return nothing if output will be truncated */
+ kfree(result);
+ return NULL;
+ }
+
+ copied = nfs4_make_rec_clidname(result + copied, name);
+ if (copied) {
+ kfree(result);
+ return NULL;
+ }
+
+ return result;
+}
+
+static int
+nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *legacy)
+{
+ char *envp[2];
+ char *argv[4];
+ int ret;
+
+ if (unlikely(!cltrack_prog[0])) {
+ dprintk("%s: cltrack_prog is disabled\n", __func__);
+ return -EACCES;
+ }
+
+ dprintk("%s: cmd: %s\n", __func__, cmd);
+ dprintk("%s: arg: %s\n", __func__, arg ? arg : "(null)");
+ dprintk("%s: legacy: %s\n", __func__, legacy ? legacy : "(null)");
+
+ envp[0] = legacy;
+ envp[1] = NULL;
+
+ argv[0] = (char *)cltrack_prog;
+ argv[1] = cmd;
+ argv[2] = arg;
+ argv[3] = NULL;
+
+ ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+ /*
+ * Disable the upcall mechanism if we're getting an ENOENT or EACCES
+ * error. The admin can re-enable it on the fly by using sysfs
+ * once the problem has been fixed.
+ */
+ if (ret == -ENOENT || ret == -EACCES) {
+ dprintk("NFSD: %s was not found or isn't executable (%d). "
+ "Setting cltrack_prog to blank string!",
+ cltrack_prog, ret);
+ cltrack_prog[0] = '\0';
+ }
+ dprintk("%s: %s return value: %d\n", __func__, cltrack_prog, ret);
+
+ return ret;
+}
+
+static char *
+bin_to_hex_dup(const unsigned char *src, int srclen)
+{
+ int i;
+ char *buf, *hex;
+
+ /* +1 for terminating NULL */
+ buf = kmalloc((srclen * 2) + 1, GFP_KERNEL);
+ if (!buf)
+ return buf;
+
+ hex = buf;
+ for (i = 0; i < srclen; i++) {
+ sprintf(hex, "%2.2x", *src++);
+ hex += 2;
+ }
+ return buf;
+}
+
+static int
+nfsd4_umh_cltrack_init(struct net __attribute__((unused)) *net)
+{
+ return nfsd4_umh_cltrack_upcall("init", NULL, NULL);
+}
+
+static void
+nfsd4_umh_cltrack_create(struct nfs4_client *clp)
+{
+ char *hexid;
+
+ hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
+ if (!hexid) {
+ dprintk("%s: can't allocate memory for upcall!\n", __func__);
+ return;
+ }
+ nfsd4_umh_cltrack_upcall("create", hexid, NULL);
+ kfree(hexid);
+}
+
+static void
+nfsd4_umh_cltrack_remove(struct nfs4_client *clp)
+{
+ char *hexid;
+
+ hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
+ if (!hexid) {
+ dprintk("%s: can't allocate memory for upcall!\n", __func__);
+ return;
+ }
+ nfsd4_umh_cltrack_upcall("remove", hexid, NULL);
+ kfree(hexid);
+}
+
+static int
+nfsd4_umh_cltrack_check(struct nfs4_client *clp)
+{
+ int ret;
+ char *hexid, *legacy;
+
+ hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
+ if (!hexid) {
+ dprintk("%s: can't allocate memory for upcall!\n", __func__);
+ return -ENOMEM;
+ }
+ legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name);
+ ret = nfsd4_umh_cltrack_upcall("check", hexid, legacy);
+ kfree(legacy);
+ kfree(hexid);
+ return ret;
+}
+
+static void
+nfsd4_umh_cltrack_grace_done(struct nfsd_net __attribute__((unused)) *nn,
+ time_t boot_time)
+{
+ char *legacy;
+ char timestr[22]; /* FIXME: better way to determine max size? */
+
+ sprintf(timestr, "%ld", boot_time);
+ legacy = nfsd4_cltrack_legacy_topdir();
+ nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy);
+ kfree(legacy);
+}
+
+static struct nfsd4_client_tracking_ops nfsd4_umh_tracking_ops = {
+ .init = nfsd4_umh_cltrack_init,
+ .exit = NULL,
+ .create = nfsd4_umh_cltrack_create,
+ .remove = nfsd4_umh_cltrack_remove,
+ .check = nfsd4_umh_cltrack_check,
+ .grace_done = nfsd4_umh_cltrack_grace_done,
+};
+
int
nfsd4_client_tracking_init(struct net *net)
{
int status;
struct path path;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- if (!client_tracking_ops) {
- client_tracking_ops = &nfsd4_cld_tracking_ops;
- status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
- if (!status) {
- if (S_ISDIR(path.dentry->d_inode->i_mode))
- client_tracking_ops =
- &nfsd4_legacy_tracking_ops;
- path_put(&path);
- }
+ /* just run the init if it the method is already decided */
+ if (nn->client_tracking_ops)
+ goto do_init;
+
+ /*
+ * First, try a UMH upcall. It should succeed or fail quickly, so
+ * there's little harm in trying that first.
+ */
+ nn->client_tracking_ops = &nfsd4_umh_tracking_ops;
+ status = nn->client_tracking_ops->init(net);
+ if (!status)
+ return status;
+
+ /*
+ * See if the recoverydir exists and is a directory. If it is,
+ * then use the legacy ops.
+ */
+ nn->client_tracking_ops = &nfsd4_legacy_tracking_ops;
+ status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
+ if (!status) {
+ status = S_ISDIR(path.dentry->d_inode->i_mode);
+ path_put(&path);
+ if (status)
+ goto do_init;
}
- status = client_tracking_ops->init(net);
+ /* Finally, try to use nfsdcld */
+ nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
+ printk(KERN_WARNING "NFSD: the nfsdcld client tracking upcall will be "
+ "removed in 3.10. Please transition to using "
+ "nfsdcltrack.\n");
+do_init:
+ status = nn->client_tracking_ops->init(net);
if (status) {
printk(KERN_WARNING "NFSD: Unable to initialize client "
"recovery tracking! (%d)\n", status);
- client_tracking_ops = NULL;
+ nn->client_tracking_ops = NULL;
}
return status;
}
@@ -955,40 +1307,49 @@ nfsd4_client_tracking_init(struct net *net)
void
nfsd4_client_tracking_exit(struct net *net)
{
- if (client_tracking_ops) {
- client_tracking_ops->exit(net);
- client_tracking_ops = NULL;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (nn->client_tracking_ops) {
+ if (nn->client_tracking_ops->exit)
+ nn->client_tracking_ops->exit(net);
+ nn->client_tracking_ops = NULL;
}
}
void
nfsd4_client_record_create(struct nfs4_client *clp)
{
- if (client_tracking_ops)
- client_tracking_ops->create(clp);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ if (nn->client_tracking_ops)
+ nn->client_tracking_ops->create(clp);
}
void
nfsd4_client_record_remove(struct nfs4_client *clp)
{
- if (client_tracking_ops)
- client_tracking_ops->remove(clp);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ if (nn->client_tracking_ops)
+ nn->client_tracking_ops->remove(clp);
}
int
nfsd4_client_record_check(struct nfs4_client *clp)
{
- if (client_tracking_ops)
- return client_tracking_ops->check(clp);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ if (nn->client_tracking_ops)
+ return nn->client_tracking_ops->check(clp);
return -EOPNOTSUPP;
}
void
-nfsd4_record_grace_done(struct net *net, time_t boot_time)
+nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time)
{
- if (client_tracking_ops)
- client_tracking_ops->grace_done(net, boot_time);
+ if (nn->client_tracking_ops)
+ nn->client_tracking_ops->grace_done(nn, boot_time);
}
static int
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d0237f872cc4..ac8ed96c4199 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -44,16 +44,11 @@
#include "xdr4.h"
#include "vfs.h"
#include "current_stateid.h"
-#include "fault_inject.h"
#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
-/* Globals */
-time_t nfsd4_lease = 90; /* default lease time */
-time_t nfsd4_grace = 90;
-
#define all_ones {{~0,~0},~0}
static const stateid_t one_stateid = {
.si_generation = ~0,
@@ -176,8 +171,6 @@ static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
return ret & OWNER_HASH_MASK;
}
-static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
-
/* hash table for nfs4_file */
#define FILE_HASH_BITS 8
#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
@@ -192,7 +185,7 @@ static struct list_head file_hashtbl[FILE_HASH_SIZE];
static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
{
- BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
+ WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
atomic_inc(&fp->fi_access[oflag]);
}
@@ -251,7 +244,7 @@ static inline int get_new_stid(struct nfs4_stid *stid)
* preallocations that can exist at a time, but the state lock
* prevents anyone from using ours before we get here:
*/
- BUG_ON(error);
+ WARN_ON_ONCE(error);
/*
* It shouldn't be a problem to reuse an opaque stateid value.
* I don't think it is for 4.1. But with 4.0 I worry that, for
@@ -340,7 +333,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct sv
fh_copy_shallow(&dp->dl_fh, &current_fh->fh_handle);
dp->dl_time = 0;
atomic_set(&dp->dl_count, 1);
- INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
+ nfsd4_init_callback(&dp->dl_recall);
return dp;
}
@@ -390,14 +383,6 @@ unhash_delegation(struct nfs4_delegation *dp)
* SETCLIENTID state
*/
-/* client_lock protects the client lru list and session hash table */
-static DEFINE_SPINLOCK(client_lock);
-
-/* Hash tables for nfs4_clientid state */
-#define CLIENT_HASH_BITS 4
-#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
-#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
-
static unsigned int clientid_hashval(u32 id)
{
return id & CLIENT_HASH_MASK;
@@ -409,31 +394,6 @@ static unsigned int clientstr_hashval(const char *name)
}
/*
- * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
- * used in reboot/reset lease grace period processing
- *
- * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
- * setclientid_confirmed info.
- *
- * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
- * setclientid info.
- *
- * client_lru holds client queue ordered by nfs4_client.cl_time
- * for lease renewal.
- *
- * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
- * for last close replay.
- */
-static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
-static int reclaim_str_hashtbl_size = 0;
-static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
-static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
-static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
-static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
-static struct list_head client_lru;
-static struct list_head close_lru;
-
-/*
* We store the NONE, READ, WRITE, and BOTH bits separately in the
* st_{access,deny}_bmap field of the stateid, in order to track not
* only what share bits are currently in force, but also what
@@ -526,7 +486,8 @@ static int nfs4_access_to_omode(u32 access)
case NFS4_SHARE_ACCESS_BOTH:
return O_RDWR;
}
- BUG();
+ WARN_ON_ONCE(1);
+ return O_RDONLY;
}
/* release all access and file references for a given stateid */
@@ -652,9 +613,6 @@ static void release_openowner(struct nfs4_openowner *oo)
nfs4_free_openowner(oo);
}
-#define SESSION_HASH_SIZE 512
-static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE];
-
static inline int
hash_sessionid(struct nfs4_sessionid *sessionid)
{
@@ -785,9 +743,12 @@ out_free:
return NULL;
}
-static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize)
+static void init_forechannel_attrs(struct nfsd4_channel_attrs *new,
+ struct nfsd4_channel_attrs *req,
+ int numslots, int slotsize,
+ struct nfsd_net *nn)
{
- u32 maxrpc = nfsd_serv->sv_max_mesg;
+ u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
new->maxreqs = numslots;
new->maxresp_cached = min_t(u32, req->maxresp_cached,
@@ -906,21 +867,27 @@ static void __free_session(struct nfsd4_session *ses)
static void free_session(struct kref *kref)
{
struct nfsd4_session *ses;
+ struct nfsd_net *nn;
- lockdep_assert_held(&client_lock);
ses = container_of(kref, struct nfsd4_session, se_ref);
+ nn = net_generic(ses->se_client->net, nfsd_net_id);
+
+ lockdep_assert_held(&nn->client_lock);
nfsd4_del_conns(ses);
__free_session(ses);
}
void nfsd4_put_session(struct nfsd4_session *ses)
{
- spin_lock(&client_lock);
+ struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id);
+
+ spin_lock(&nn->client_lock);
nfsd4_put_session_locked(ses);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
}
-static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan)
+static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan,
+ struct nfsd_net *nn)
{
struct nfsd4_session *new;
int numslots, slotsize;
@@ -941,13 +908,14 @@ static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan)
nfsd4_put_drc_mem(slotsize, fchan->maxreqs);
return NULL;
}
- init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize);
+ init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn);
return new;
}
-static struct nfsd4_session *init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
+static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
{
int idx;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
new->se_client = clp;
gen_sessionid(new);
@@ -957,14 +925,15 @@ static struct nfsd4_session *init_session(struct svc_rqst *rqstp, struct nfsd4_s
new->se_cb_seq_nr = 1;
new->se_flags = cses->flags;
new->se_cb_prog = cses->callback_prog;
+ new->se_cb_sec = cses->cb_sec;
kref_init(&new->se_ref);
idx = hash_sessionid(&new->se_sessionid);
- spin_lock(&client_lock);
- list_add(&new->se_hash, &sessionid_hashtbl[idx]);
+ spin_lock(&nn->client_lock);
+ list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
spin_lock(&clp->cl_lock);
list_add(&new->se_perclnt, &clp->cl_sessions);
spin_unlock(&clp->cl_lock);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
if (cses->flags & SESSION4_BACK_CHAN) {
struct sockaddr *sa = svc_addr(rqstp);
@@ -978,20 +947,20 @@ static struct nfsd4_session *init_session(struct svc_rqst *rqstp, struct nfsd4_s
rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
}
- return new;
}
/* caller must hold client_lock */
static struct nfsd4_session *
-find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
+find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
{
struct nfsd4_session *elem;
int idx;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
dump_sessionid(__func__, sessionid);
idx = hash_sessionid(sessionid);
/* Search in the appropriate list */
- list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) {
+ list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
if (!memcmp(elem->se_sessionid.data, sessionid->data,
NFS4_MAX_SESSIONID_LEN)) {
return elem;
@@ -1016,6 +985,8 @@ unhash_session(struct nfsd4_session *ses)
static inline void
renew_client_locked(struct nfs4_client *clp)
{
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
if (is_client_expired(clp)) {
WARN_ON(1);
printk("%s: client (clientid %08x/%08x) already expired\n",
@@ -1028,16 +999,18 @@ renew_client_locked(struct nfs4_client *clp)
dprintk("renewing client (clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot,
clp->cl_clientid.cl_id);
- list_move_tail(&clp->cl_lru, &client_lru);
+ list_move_tail(&clp->cl_lru, &nn->client_lru);
clp->cl_time = get_seconds();
}
static inline void
renew_client(struct nfs4_client *clp)
{
- spin_lock(&client_lock);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ spin_lock(&nn->client_lock);
renew_client_locked(clp);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
}
/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
@@ -1075,7 +1048,9 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
static inline void
free_client(struct nfs4_client *clp)
{
- lockdep_assert_held(&client_lock);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ lockdep_assert_held(&nn->client_lock);
while (!list_empty(&clp->cl_sessions)) {
struct nfsd4_session *ses;
ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
@@ -1092,15 +1067,16 @@ void
release_session_client(struct nfsd4_session *session)
{
struct nfs4_client *clp = session->se_client;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
- if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock))
+ if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
return;
if (is_client_expired(clp)) {
free_client(clp);
session->se_client = NULL;
} else
renew_client_locked(clp);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
}
/* must be called under the client_lock */
@@ -1123,6 +1099,7 @@ destroy_client(struct nfs4_client *clp)
struct nfs4_openowner *oo;
struct nfs4_delegation *dp;
struct list_head reaplist;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
INIT_LIST_HEAD(&reaplist);
spin_lock(&recall_lock);
@@ -1144,12 +1121,15 @@ destroy_client(struct nfs4_client *clp)
if (clp->cl_cb_conn.cb_xprt)
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
list_del(&clp->cl_idhash);
- list_del(&clp->cl_strhash);
- spin_lock(&client_lock);
+ if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
+ rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
+ else
+ rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
+ spin_lock(&nn->client_lock);
unhash_client_locked(clp);
if (atomic_read(&clp->cl_refcount) == 0)
free_client(clp);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
}
static void expire_client(struct nfs4_client *clp)
@@ -1187,6 +1167,17 @@ static int copy_cred(struct svc_cred *target, struct svc_cred *source)
return 0;
}
+static long long
+compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
+{
+ long long res;
+
+ res = o1->len - o2->len;
+ if (res)
+ return res;
+ return (long long)memcmp(o1->data, o2->data, o1->len);
+}
+
static int same_name(const char *n1, const char *n2)
{
return 0 == memcmp(n1, n2, HEXDIR_LEN);
@@ -1247,10 +1238,9 @@ same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
}
-static void gen_clid(struct nfs4_client *clp)
+static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
{
static u32 current_clientid = 1;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
clp->cl_clientid.cl_boot = nn->boot_time;
clp->cl_clientid.cl_id = current_clientid++;
@@ -1283,12 +1273,14 @@ static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t
return NULL;
}
-static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
+static struct nfs4_client *create_client(struct xdr_netobj name,
struct svc_rqst *rqstp, nfs4_verifier *verf)
{
struct nfs4_client *clp;
struct sockaddr *sa = svc_addr(rqstp);
int ret;
+ struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
clp = alloc_client(name);
if (clp == NULL)
@@ -1297,23 +1289,21 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
INIT_LIST_HEAD(&clp->cl_sessions);
ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
if (ret) {
- spin_lock(&client_lock);
+ spin_lock(&nn->client_lock);
free_client(clp);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
return NULL;
}
idr_init(&clp->cl_stateids);
- memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
atomic_set(&clp->cl_refcount, 0);
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
INIT_LIST_HEAD(&clp->cl_idhash);
- INIT_LIST_HEAD(&clp->cl_strhash);
INIT_LIST_HEAD(&clp->cl_openowners);
INIT_LIST_HEAD(&clp->cl_delegations);
INIT_LIST_HEAD(&clp->cl_lru);
INIT_LIST_HEAD(&clp->cl_callbacks);
spin_lock_init(&clp->cl_lock);
- INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc);
+ nfsd4_init_callback(&clp->cl_cb_null);
clp->cl_time = get_seconds();
clear_bit(0, &clp->cl_cb_slot_busy);
rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
@@ -1321,17 +1311,60 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
gen_confirm(clp);
clp->cl_cb_session = NULL;
+ clp->net = net;
return clp;
}
static void
-add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
+add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
+{
+ struct rb_node **new = &(root->rb_node), *parent = NULL;
+ struct nfs4_client *clp;
+
+ while (*new) {
+ clp = rb_entry(*new, struct nfs4_client, cl_namenode);
+ parent = *new;
+
+ if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
+ new = &((*new)->rb_left);
+ else
+ new = &((*new)->rb_right);
+ }
+
+ rb_link_node(&new_clp->cl_namenode, parent, new);
+ rb_insert_color(&new_clp->cl_namenode, root);
+}
+
+static struct nfs4_client *
+find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
+{
+ long long cmp;
+ struct rb_node *node = root->rb_node;
+ struct nfs4_client *clp;
+
+ while (node) {
+ clp = rb_entry(node, struct nfs4_client, cl_namenode);
+ cmp = compare_blob(&clp->cl_name, name);
+ if (cmp > 0)
+ node = node->rb_left;
+ else if (cmp < 0)
+ node = node->rb_right;
+ else
+ return clp;
+ }
+ return NULL;
+}
+
+static void
+add_to_unconfirmed(struct nfs4_client *clp)
{
unsigned int idhashval;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
- list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
+ clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
+ add_clp_to_name_tree(clp, &nn->unconf_name_tree);
idhashval = clientid_hashval(clp->cl_clientid.cl_id);
- list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
+ list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
renew_client(clp);
}
@@ -1339,22 +1372,23 @@ static void
move_to_confirmed(struct nfs4_client *clp)
{
unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
- unsigned int strhashval;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
- list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
- strhashval = clientstr_hashval(clp->cl_recdir);
- list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
+ list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
+ rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
+ add_clp_to_name_tree(clp, &nn->conf_name_tree);
+ set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
renew_client(clp);
}
static struct nfs4_client *
-find_confirmed_client(clientid_t *clid, bool sessions)
+find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
{
struct nfs4_client *clp;
unsigned int idhashval = clientid_hashval(clid->cl_id);
- list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
+ list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) {
if (same_clid(&clp->cl_clientid, clid)) {
if ((bool)clp->cl_minorversion != sessions)
return NULL;
@@ -1366,12 +1400,12 @@ find_confirmed_client(clientid_t *clid, bool sessions)
}
static struct nfs4_client *
-find_unconfirmed_client(clientid_t *clid, bool sessions)
+find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
{
struct nfs4_client *clp;
unsigned int idhashval = clientid_hashval(clid->cl_id);
- list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
+ list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) {
if (same_clid(&clp->cl_clientid, clid)) {
if ((bool)clp->cl_minorversion != sessions)
return NULL;
@@ -1387,27 +1421,15 @@ static bool clp_used_exchangeid(struct nfs4_client *clp)
}
static struct nfs4_client *
-find_confirmed_client_by_str(const char *dname, unsigned int hashval)
+find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
{
- struct nfs4_client *clp;
-
- list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
- if (same_name(clp->cl_recdir, dname))
- return clp;
- }
- return NULL;
+ return find_clp_in_name_tree(name, &nn->conf_name_tree);
}
static struct nfs4_client *
-find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
+find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
{
- struct nfs4_client *clp;
-
- list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
- if (same_name(clp->cl_recdir, dname))
- return clp;
- }
- return NULL;
+ return find_clp_in_name_tree(name, &nn->unconf_name_tree);
}
static void
@@ -1428,7 +1450,7 @@ gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_r
else
goto out_err;
- conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val,
+ conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
se->se_callback_addr_len,
(struct sockaddr *)&conn->cb_addr,
sizeof(conn->cb_addr));
@@ -1572,12 +1594,11 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
{
struct nfs4_client *unconf, *conf, *new;
__be32 status;
- unsigned int strhashval;
- char dname[HEXDIR_LEN];
char addr_str[INET6_ADDRSTRLEN];
nfs4_verifier verf = exid->verifier;
struct sockaddr *sa = svc_addr(rqstp);
bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
rpc_ntop(sa, addr_str, sizeof(addr_str));
dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
@@ -1592,24 +1613,16 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
switch (exid->spa_how) {
case SP4_NONE:
break;
+ default: /* checked by xdr code */
+ WARN_ON_ONCE(1);
case SP4_SSV:
- return nfserr_serverfault;
- default:
- BUG(); /* checked by xdr code */
case SP4_MACH_CRED:
return nfserr_serverfault; /* no excuse :-/ */
}
- status = nfs4_make_rec_clidname(dname, &exid->clname);
-
- if (status)
- return status;
-
- strhashval = clientstr_hashval(dname);
-
/* Cases below refer to rfc 5661 section 18.35.4: */
nfs4_lock_state();
- conf = find_confirmed_client_by_str(dname, strhashval);
+ conf = find_confirmed_client_by_name(&exid->clname, nn);
if (conf) {
bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
bool verfs_match = same_verf(&verf, &conf->cl_verifier);
@@ -1654,21 +1667,21 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
goto out;
}
- unconf = find_unconfirmed_client_by_str(dname, strhashval);
+ unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
if (unconf) /* case 4, possible retry or client restart */
expire_client(unconf);
/* case 1 (normal case) */
out_new:
- new = create_client(exid->clname, dname, rqstp, &verf);
+ new = create_client(exid->clname, rqstp, &verf);
if (new == NULL) {
status = nfserr_jukebox;
goto out;
}
new->cl_minorversion = 1;
- gen_clid(new);
- add_to_unconfirmed(new, strhashval);
+ gen_clid(new, nn);
+ add_to_unconfirmed(new);
out_copy:
exid->clientid.cl_boot = new->cl_clientid.cl_boot;
exid->clientid.cl_id = new->cl_clientid.cl_id;
@@ -1761,12 +1774,13 @@ nfsd4_create_session(struct svc_rqst *rqstp,
struct nfsd4_conn *conn;
struct nfsd4_clid_slot *cs_slot = NULL;
__be32 status = 0;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
return nfserr_inval;
if (check_forechannel_attrs(cr_ses->fore_channel))
return nfserr_toosmall;
- new = alloc_session(&cr_ses->fore_channel);
+ new = alloc_session(&cr_ses->fore_channel, nn);
if (!new)
return nfserr_jukebox;
status = nfserr_jukebox;
@@ -1775,8 +1789,8 @@ nfsd4_create_session(struct svc_rqst *rqstp,
goto out_free_session;
nfs4_lock_state();
- unconf = find_unconfirmed_client(&cr_ses->clientid, true);
- conf = find_confirmed_client(&cr_ses->clientid, true);
+ unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
+ conf = find_confirmed_client(&cr_ses->clientid, true, nn);
if (conf) {
cs_slot = &conf->cl_cs_slot;
@@ -1789,7 +1803,6 @@ nfsd4_create_session(struct svc_rqst *rqstp,
goto out_free_conn;
}
} else if (unconf) {
- unsigned int hash;
struct nfs4_client *old;
if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
!rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
@@ -1803,8 +1816,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
status = nfserr_seq_misordered;
goto out_free_conn;
}
- hash = clientstr_hashval(unconf->cl_recdir);
- old = find_confirmed_client_by_str(unconf->cl_recdir, hash);
+ old = find_confirmed_client_by_name(&unconf->cl_name, nn);
if (old)
expire_client(old);
move_to_confirmed(unconf);
@@ -1843,14 +1855,6 @@ out_free_session:
goto out;
}
-static bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
-{
- struct nfsd4_compoundres *resp = rqstp->rq_resp;
- struct nfsd4_compoundargs *argp = rqstp->rq_argp;
-
- return argp->opcnt == resp->opcnt;
-}
-
static __be32 nfsd4_map_bcts_dir(u32 *dir)
{
switch (*dir) {
@@ -1865,24 +1869,40 @@ static __be32 nfsd4_map_bcts_dir(u32 *dir)
return nfserr_inval;
}
+__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
+{
+ struct nfsd4_session *session = cstate->session;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
+ spin_lock(&nn->client_lock);
+ session->se_cb_prog = bc->bc_cb_program;
+ session->se_cb_sec = bc->bc_cb_sec;
+ spin_unlock(&nn->client_lock);
+
+ nfsd4_probe_callback(session->se_client);
+
+ return nfs_ok;
+}
+
__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_bind_conn_to_session *bcts)
{
__be32 status;
struct nfsd4_conn *conn;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (!nfsd4_last_compound_op(rqstp))
return nfserr_not_only_op;
- spin_lock(&client_lock);
- cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid);
+ spin_lock(&nn->client_lock);
+ cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp));
/* Sorta weird: we only need the refcnt'ing because new_conn acquires
* client_lock iself: */
if (cstate->session) {
nfsd4_get_session(cstate->session);
atomic_inc(&cstate->session->se_client->cl_refcount);
}
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
if (!cstate->session)
return nfserr_badsession;
@@ -1910,6 +1930,7 @@ nfsd4_destroy_session(struct svc_rqst *r,
{
struct nfsd4_session *ses;
__be32 status = nfserr_badsession;
+ struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id);
/* Notes:
* - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
@@ -1923,24 +1944,24 @@ nfsd4_destroy_session(struct svc_rqst *r,
return nfserr_not_only_op;
}
dump_sessionid(__func__, &sessionid->sessionid);
- spin_lock(&client_lock);
- ses = find_in_sessionid_hashtbl(&sessionid->sessionid);
+ spin_lock(&nn->client_lock);
+ ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r));
if (!ses) {
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
goto out;
}
unhash_session(ses);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
nfs4_lock_state();
nfsd4_probe_callback_sync(ses->se_client);
nfs4_unlock_state();
- spin_lock(&client_lock);
+ spin_lock(&nn->client_lock);
nfsd4_del_conns(ses);
nfsd4_put_session_locked(ses);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
status = nfs_ok;
out:
dprintk("%s returns %d\n", __func__, ntohl(status));
@@ -2006,6 +2027,7 @@ nfsd4_sequence(struct svc_rqst *rqstp,
struct nfsd4_slot *slot;
struct nfsd4_conn *conn;
__be32 status;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (resp->opcnt != 1)
return nfserr_sequence_pos;
@@ -2018,9 +2040,9 @@ nfsd4_sequence(struct svc_rqst *rqstp,
if (!conn)
return nfserr_jukebox;
- spin_lock(&client_lock);
+ spin_lock(&nn->client_lock);
status = nfserr_badsession;
- session = find_in_sessionid_hashtbl(&seq->sessionid);
+ session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp));
if (!session)
goto out;
@@ -2094,7 +2116,7 @@ out:
}
}
kfree(conn);
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
dprintk("%s: return %d\n", __func__, ntohl(status));
return status;
}
@@ -2104,10 +2126,11 @@ nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta
{
struct nfs4_client *conf, *unconf, *clp;
__be32 status = 0;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
nfs4_lock_state();
- unconf = find_unconfirmed_client(&dc->clientid, true);
- conf = find_confirmed_client(&dc->clientid, true);
+ unconf = find_unconfirmed_client(&dc->clientid, true, nn);
+ conf = find_confirmed_client(&dc->clientid, true, nn);
if (conf) {
clp = conf;
@@ -2181,20 +2204,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
{
struct xdr_netobj clname = setclid->se_name;
nfs4_verifier clverifier = setclid->se_verf;
- unsigned int strhashval;
struct nfs4_client *conf, *unconf, *new;
__be32 status;
- char dname[HEXDIR_LEN];
-
- status = nfs4_make_rec_clidname(dname, &clname);
- if (status)
- return status;
-
- strhashval = clientstr_hashval(dname);
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
/* Cases below refer to rfc 3530 section 14.2.33: */
nfs4_lock_state();
- conf = find_confirmed_client_by_str(dname, strhashval);
+ conf = find_confirmed_client_by_name(&clname, nn);
if (conf) {
/* case 0: */
status = nfserr_clid_inuse;
@@ -2209,21 +2225,21 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
}
- unconf = find_unconfirmed_client_by_str(dname, strhashval);
+ unconf = find_unconfirmed_client_by_name(&clname, nn);
if (unconf)
expire_client(unconf);
status = nfserr_jukebox;
- new = create_client(clname, dname, rqstp, &clverifier);
+ new = create_client(clname, rqstp, &clverifier);
if (new == NULL)
goto out;
if (conf && same_verf(&conf->cl_verifier, &clverifier))
/* case 1: probable callback update */
copy_clid(new, conf);
else /* case 4 (new client) or cases 2, 3 (client reboot): */
- gen_clid(new);
+ gen_clid(new, nn);
new->cl_minorversion = 0;
gen_callback(new, setclid, rqstp);
- add_to_unconfirmed(new, strhashval);
+ add_to_unconfirmed(new);
setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
@@ -2243,14 +2259,14 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
nfs4_verifier confirm = setclientid_confirm->sc_confirm;
clientid_t * clid = &setclientid_confirm->sc_clientid;
__be32 status;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (STALE_CLIENTID(clid, nn))
return nfserr_stale_clientid;
nfs4_lock_state();
- conf = find_confirmed_client(clid, false);
- unconf = find_unconfirmed_client(clid, false);
+ conf = find_confirmed_client(clid, false, nn);
+ unconf = find_unconfirmed_client(clid, false, nn);
/*
* We try hard to give out unique clientid's, so if we get an
* attempt to confirm the same clientid with a different cred,
@@ -2276,9 +2292,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
nfsd4_probe_callback(conf);
expire_client(unconf);
} else { /* case 3: normal case; new or rebooted client */
- unsigned int hash = clientstr_hashval(unconf->cl_recdir);
-
- conf = find_confirmed_client_by_str(unconf->cl_recdir, hash);
+ conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
if (conf)
expire_client(conf);
move_to_confirmed(unconf);
@@ -2340,7 +2354,7 @@ nfsd4_init_slabs(void)
if (openowner_slab == NULL)
goto out_nomem;
lockowner_slab = kmem_cache_create("nfsd4_lockowners",
- sizeof(struct nfs4_openowner), 0, 0, NULL);
+ sizeof(struct nfs4_lockowner), 0, 0, NULL);
if (lockowner_slab == NULL)
goto out_nomem;
file_slab = kmem_cache_create("nfsd4_files",
@@ -2404,7 +2418,9 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj
static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
{
- list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
list_add(&oo->oo_perclient, &clp->cl_openowners);
}
@@ -2444,11 +2460,13 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
}
static void
-move_to_close_lru(struct nfs4_openowner *oo)
+move_to_close_lru(struct nfs4_openowner *oo, struct net *net)
{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
- list_move_tail(&oo->oo_close_lru, &close_lru);
+ list_move_tail(&oo->oo_close_lru, &nn->close_lru);
oo->oo_time = get_seconds();
}
@@ -2462,13 +2480,14 @@ same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
}
static struct nfs4_openowner *
-find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions)
+find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
+ bool sessions, struct nfsd_net *nn)
{
struct nfs4_stateowner *so;
struct nfs4_openowner *oo;
struct nfs4_client *clp;
- list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
+ list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
if (!so->so_is_open_owner)
continue;
if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
@@ -2555,9 +2574,14 @@ static void nfsd_break_deleg_cb(struct file_lock *fl)
struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
struct nfs4_delegation *dp;
- BUG_ON(!fp);
- /* We assume break_lease is only called once per lease: */
- BUG_ON(fp->fi_had_conflict);
+ if (!fp) {
+ WARN(1, "(%p)->fl_owner NULL\n", fl);
+ return;
+ }
+ if (fp->fi_had_conflict) {
+ WARN(1, "duplicate break on %p\n", fp);
+ return;
+ }
/*
* We don't want the locks code to timeout the lease for us;
* we'll remove it ourself if a delegation isn't returned
@@ -2599,14 +2623,13 @@ static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4
__be32
nfsd4_process_open1(struct nfsd4_compound_state *cstate,
- struct nfsd4_open *open)
+ struct nfsd4_open *open, struct nfsd_net *nn)
{
clientid_t *clientid = &open->op_clientid;
struct nfs4_client *clp = NULL;
unsigned int strhashval;
struct nfs4_openowner *oo = NULL;
__be32 status;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
if (STALE_CLIENTID(&open->op_clientid, nn))
return nfserr_stale_clientid;
@@ -2619,10 +2642,11 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
return nfserr_jukebox;
strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
- oo = find_openstateowner_str(strhashval, open, cstate->minorversion);
+ oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
open->op_openowner = oo;
if (!oo) {
- clp = find_confirmed_client(clientid, cstate->minorversion);
+ clp = find_confirmed_client(clientid, cstate->minorversion,
+ nn);
if (clp == NULL)
return nfserr_expired;
goto new_owner;
@@ -2891,7 +2915,7 @@ static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
open->op_why_no_deleg = WND4_CANCELLED;
break;
case NFS4_SHARE_WANT_NO_DELEG:
- BUG(); /* not supposed to get here */
+ WARN_ON_ONCE(1);
}
}
}
@@ -2959,6 +2983,7 @@ out:
}
return;
out_free:
+ unhash_stid(&dp->dl_stid);
nfs4_put_delegation(dp);
out_no_deleg:
flag = NFS4_OPEN_DELEGATE_NONE;
@@ -3104,27 +3129,32 @@ void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
free_generic_stateid(open->op_stp);
}
+static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp)
+{
+ struct nfs4_client *found;
+
+ if (STALE_CLIENTID(clid, nn))
+ return nfserr_stale_clientid;
+ found = find_confirmed_client(clid, session, nn);
+ if (clp)
+ *clp = found;
+ return found ? nfs_ok : nfserr_expired;
+}
+
__be32
nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
clientid_t *clid)
{
struct nfs4_client *clp;
__be32 status;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
nfs4_lock_state();
dprintk("process_renew(%08x/%08x): starting\n",
clid->cl_boot, clid->cl_id);
- status = nfserr_stale_clientid;
- if (STALE_CLIENTID(clid, nn))
- goto out;
- clp = find_confirmed_client(clid, cstate->minorversion);
- status = nfserr_expired;
- if (clp == NULL) {
- /* We assume the client took too long to RENEW. */
- dprintk("nfsd4_renew: clientid not found!\n");
+ status = lookup_clientid(clid, cstate->minorversion, nn, &clp);
+ if (status)
goto out;
- }
status = nfserr_cb_path_down;
if (!list_empty(&clp->cl_delegations)
&& clp->cl_cb_state != NFSD4_CB_UP)
@@ -3136,44 +3166,42 @@ out:
}
static void
-nfsd4_end_grace(struct net *net)
+nfsd4_end_grace(struct nfsd_net *nn)
{
- struct nfsd_net *nn = net_generic(net, nfsd_net_id);
-
/* do nothing if grace period already ended */
if (nn->grace_ended)
return;
dprintk("NFSD: end of grace period\n");
nn->grace_ended = true;
- nfsd4_record_grace_done(net, nn->boot_time);
+ nfsd4_record_grace_done(nn, nn->boot_time);
locks_end_grace(&nn->nfsd4_manager);
/*
* Now that every NFSv4 client has had the chance to recover and
* to see the (possibly new, possibly shorter) lease time, we
* can safely set the next grace time to the current lease time:
*/
- nfsd4_grace = nfsd4_lease;
+ nn->nfsd4_grace = nn->nfsd4_lease;
}
static time_t
-nfs4_laundromat(void)
+nfs4_laundromat(struct nfsd_net *nn)
{
struct nfs4_client *clp;
struct nfs4_openowner *oo;
struct nfs4_delegation *dp;
struct list_head *pos, *next, reaplist;
- time_t cutoff = get_seconds() - nfsd4_lease;
- time_t t, clientid_val = nfsd4_lease;
- time_t u, test_val = nfsd4_lease;
+ time_t cutoff = get_seconds() - nn->nfsd4_lease;
+ time_t t, clientid_val = nn->nfsd4_lease;
+ time_t u, test_val = nn->nfsd4_lease;
nfs4_lock_state();
dprintk("NFSD: laundromat service - starting\n");
- nfsd4_end_grace(&init_net);
+ nfsd4_end_grace(nn);
INIT_LIST_HEAD(&reaplist);
- spin_lock(&client_lock);
- list_for_each_safe(pos, next, &client_lru) {
+ spin_lock(&nn->client_lock);
+ list_for_each_safe(pos, next, &nn->client_lru) {
clp = list_entry(pos, struct nfs4_client, cl_lru);
if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
t = clp->cl_time - cutoff;
@@ -3189,7 +3217,7 @@ nfs4_laundromat(void)
unhash_client_locked(clp);
list_add(&clp->cl_lru, &reaplist);
}
- spin_unlock(&client_lock);
+ spin_unlock(&nn->client_lock);
list_for_each_safe(pos, next, &reaplist) {
clp = list_entry(pos, struct nfs4_client, cl_lru);
dprintk("NFSD: purging unused client (clientid %08x)\n",
@@ -3199,6 +3227,8 @@ nfs4_laundromat(void)
spin_lock(&recall_lock);
list_for_each_safe(pos, next, &del_recall_lru) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
+ if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
+ continue;
if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
u = dp->dl_time - cutoff;
if (test_val > u)
@@ -3212,8 +3242,8 @@ nfs4_laundromat(void)
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
unhash_delegation(dp);
}
- test_val = nfsd4_lease;
- list_for_each_safe(pos, next, &close_lru) {
+ test_val = nn->nfsd4_lease;
+ list_for_each_safe(pos, next, &nn->close_lru) {
oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
u = oo->oo_time - cutoff;
@@ -3231,16 +3261,19 @@ nfs4_laundromat(void)
static struct workqueue_struct *laundry_wq;
static void laundromat_main(struct work_struct *);
-static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
static void
-laundromat_main(struct work_struct *not_used)
+laundromat_main(struct work_struct *laundry)
{
time_t t;
+ struct delayed_work *dwork = container_of(laundry, struct delayed_work,
+ work);
+ struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
+ laundromat_work);
- t = nfs4_laundromat();
+ t = nfs4_laundromat(nn);
dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
- queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
+ queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
}
static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
@@ -3385,16 +3418,17 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
return nfs_ok;
}
-static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions)
+static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask,
+ struct nfs4_stid **s, bool sessions,
+ struct nfsd_net *nn)
{
struct nfs4_client *cl;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return nfserr_bad_stateid;
if (STALE_STATEID(stateid, nn))
return nfserr_stale_stateid;
- cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions);
+ cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn);
if (!cl)
return nfserr_expired;
*s = find_stateid_by_type(cl, stateid, typemask);
@@ -3416,6 +3450,7 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
struct nfs4_delegation *dp = NULL;
struct svc_fh *current_fh = &cstate->current_fh;
struct inode *ino = current_fh->fh_dentry->d_inode;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
__be32 status;
if (filpp)
@@ -3427,7 +3462,8 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return check_special_stateids(net, current_fh, stateid, flags);
- status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion);
+ status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
+ &s, cstate->minorversion, nn);
if (status)
return status;
status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
@@ -3441,7 +3477,11 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
goto out;
if (filpp) {
*filpp = dp->dl_file->fi_deleg_file;
- BUG_ON(!*filpp);
+ if (!*filpp) {
+ WARN_ON_ONCE(1);
+ status = nfserr_serverfault;
+ goto out;
+ }
}
break;
case NFS4_OPEN_STID:
@@ -3568,7 +3608,8 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_
static __be32
nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
stateid_t *stateid, char typemask,
- struct nfs4_ol_stateid **stpp)
+ struct nfs4_ol_stateid **stpp,
+ struct nfsd_net *nn)
{
__be32 status;
struct nfs4_stid *s;
@@ -3577,7 +3618,8 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
seqid, STATEID_VAL(stateid));
*stpp = NULL;
- status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion);
+ status = nfsd4_lookup_stateid(stateid, typemask, &s,
+ cstate->minorversion, nn);
if (status)
return status;
*stpp = openlockstateid(s);
@@ -3586,13 +3628,14 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp);
}
-static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp)
+static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
+ stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
{
__be32 status;
struct nfs4_openowner *oo;
status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
- NFS4_OPEN_STID, stpp);
+ NFS4_OPEN_STID, stpp, nn);
if (status)
return status;
oo = openowner((*stpp)->st_stateowner);
@@ -3608,6 +3651,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
__be32 status;
struct nfs4_openowner *oo;
struct nfs4_ol_stateid *stp;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
(int)cstate->current_fh.fh_dentry->d_name.len,
@@ -3621,7 +3665,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_seqid_op(cstate,
oc->oc_seqid, &oc->oc_req_stateid,
- NFS4_OPEN_STID, &stp);
+ NFS4_OPEN_STID, &stp, nn);
if (status)
goto out;
oo = openowner(stp->st_stateowner);
@@ -3664,7 +3708,7 @@ static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_ac
case NFS4_SHARE_ACCESS_BOTH:
break;
default:
- BUG();
+ WARN_ON_ONCE(1);
}
}
@@ -3685,6 +3729,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
{
__be32 status;
struct nfs4_ol_stateid *stp;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
(int)cstate->current_fh.fh_dentry->d_name.len,
@@ -3697,7 +3742,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
nfs4_lock_state();
status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
- &od->od_stateid, &stp);
+ &od->od_stateid, &stp, nn);
if (status)
goto out;
status = nfserr_inval;
@@ -3760,6 +3805,8 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
__be32 status;
struct nfs4_openowner *oo;
struct nfs4_ol_stateid *stp;
+ struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
dprintk("NFSD: nfsd4_close on file %.*s\n",
(int)cstate->current_fh.fh_dentry->d_name.len,
@@ -3769,7 +3816,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
&close->cl_stateid,
NFS4_OPEN_STID|NFS4_CLOSED_STID,
- &stp);
+ &stp, nn);
if (status)
goto out;
oo = openowner(stp->st_stateowner);
@@ -3791,7 +3838,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
* little while to handle CLOSE replay.
*/
if (list_empty(&oo->oo_owner.so_stateids))
- move_to_close_lru(oo);
+ move_to_close_lru(oo, SVC_NET(rqstp));
}
}
out:
@@ -3807,15 +3854,15 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfs4_delegation *dp;
stateid_t *stateid = &dr->dr_stateid;
struct nfs4_stid *s;
- struct inode *inode;
__be32 status;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
return status;
- inode = cstate->current_fh.fh_dentry->d_inode;
nfs4_lock_state();
- status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion);
+ status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s,
+ cstate->minorversion, nn);
if (status)
goto out;
dp = delegstateid(s);
@@ -3833,8 +3880,6 @@ out:
#define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
-#define LOCKOWNER_INO_HASH_BITS 8
-#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
static inline u64
@@ -3852,7 +3897,7 @@ last_byte_offset(u64 start, u64 len)
{
u64 end;
- BUG_ON(!len);
+ WARN_ON_ONCE(!len);
end = start + len;
return end > start ? end - 1: NFS4_MAX_UINT64;
}
@@ -3864,8 +3909,6 @@ static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct
& LOCKOWNER_INO_HASH_MASK;
}
-static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE];
-
/*
* TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
* we can't properly handle lock requests that go beyond the (2^63 - 1)-th
@@ -3931,12 +3974,12 @@ static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, c
static struct nfs4_lockowner *
find_lockowner_str(struct inode *inode, clientid_t *clid,
- struct xdr_netobj *owner)
+ struct xdr_netobj *owner, struct nfsd_net *nn)
{
unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner);
struct nfs4_lockowner *lo;
- list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) {
+ list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) {
if (same_lockowner_ino(lo, inode, clid, owner))
return lo;
}
@@ -3948,9 +3991,10 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s
struct inode *inode = open_stp->st_file->fi_inode;
unsigned int inohash = lockowner_ino_hashval(inode,
clp->cl_clientid.cl_id, &lo->lo_owner.so_owner);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
- list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]);
- list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]);
+ list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
+ list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]);
list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
}
@@ -4024,8 +4068,10 @@ static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, s
struct nfs4_client *cl = oo->oo_owner.so_client;
struct nfs4_lockowner *lo;
unsigned int strhashval;
+ struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
- lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner);
+ lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid,
+ &lock->v.new.owner, nn);
if (lo) {
if (!cstate->minorversion)
return nfserr_bad_seqid;
@@ -4065,7 +4111,8 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
bool new_state = false;
int lkflg;
int err;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
(long long) lock->lk_offset,
@@ -4099,7 +4146,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_confirmed_seqid_op(cstate,
lock->lk_new_open_seqid,
&lock->lk_new_open_stateid,
- &open_stp);
+ &open_stp, nn);
if (status)
goto out;
open_sop = openowner(open_stp->st_stateowner);
@@ -4113,7 +4160,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_seqid_op(cstate,
lock->lk_old_lock_seqid,
&lock->lk_old_lock_stateid,
- NFS4_LOCK_STID, &lock_stp);
+ NFS4_LOCK_STID, &lock_stp, nn);
if (status)
goto out;
lock_sop = lockowner(lock_stp->st_stateowner);
@@ -4124,10 +4171,10 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
status = nfserr_grace;
- if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim)
+ if (locks_in_grace(net) && !lock->lk_reclaim)
goto out;
status = nfserr_no_grace;
- if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim)
+ if (!locks_in_grace(net) && lock->lk_reclaim)
goto out;
file_lock = locks_alloc_lock();
@@ -4238,7 +4285,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct file_lock *file_lock = NULL;
struct nfs4_lockowner *lo;
__be32 status;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (locks_in_grace(SVC_NET(rqstp)))
return nfserr_grace;
@@ -4248,9 +4295,11 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state();
- status = nfserr_stale_clientid;
- if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn))
- goto out;
+ if (!nfsd4_has_session(cstate)) {
+ status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL);
+ if (status)
+ goto out;
+ }
if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
goto out;
@@ -4278,7 +4327,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
- lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner);
+ lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn);
if (lo)
file_lock->fl_owner = (fl_owner_t)lo;
file_lock->fl_pid = current->tgid;
@@ -4313,7 +4362,8 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct file_lock *file_lock = NULL;
__be32 status;
int err;
-
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+
dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
(long long) locku->lu_offset,
(long long) locku->lu_length);
@@ -4324,7 +4374,8 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state();
status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
- &locku->lu_stateid, NFS4_LOCK_STID, &stp);
+ &locku->lu_stateid, NFS4_LOCK_STID,
+ &stp, nn);
if (status)
goto out;
filp = find_any_file(stp->st_file);
@@ -4414,23 +4465,21 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
struct list_head matches;
unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
__be32 status;
- struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
clid->cl_boot, clid->cl_id);
- /* XXX check for lease expiration */
-
- status = nfserr_stale_clientid;
- if (STALE_CLIENTID(clid, nn))
- return status;
-
nfs4_lock_state();
+ status = lookup_clientid(clid, cstate->minorversion, nn, NULL);
+ if (status)
+ goto out;
+
status = nfserr_locks_held;
INIT_LIST_HEAD(&matches);
- list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) {
+ list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) {
if (sop->so_is_open_owner)
continue;
if (!same_owner_str(sop, owner, clid))
@@ -4466,73 +4515,74 @@ alloc_reclaim(void)
return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
}
-int
-nfs4_has_reclaimed_state(const char *name, bool use_exchange_id)
+bool
+nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
{
- unsigned int strhashval = clientstr_hashval(name);
- struct nfs4_client *clp;
+ struct nfs4_client_reclaim *crp;
- clp = find_confirmed_client_by_str(name, strhashval);
- if (!clp)
- return 0;
- return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
+ crp = nfsd4_find_reclaim_client(name, nn);
+ return (crp && crp->cr_clp);
}
/*
* failure => all reset bets are off, nfserr_no_grace...
*/
-int
-nfs4_client_to_reclaim(const char *name)
+struct nfs4_client_reclaim *
+nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
{
unsigned int strhashval;
- struct nfs4_client_reclaim *crp = NULL;
+ struct nfs4_client_reclaim *crp;
dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
crp = alloc_reclaim();
- if (!crp)
- return 0;
- strhashval = clientstr_hashval(name);
- INIT_LIST_HEAD(&crp->cr_strhash);
- list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
- memcpy(crp->cr_recdir, name, HEXDIR_LEN);
- reclaim_str_hashtbl_size++;
- return 1;
+ if (crp) {
+ strhashval = clientstr_hashval(name);
+ INIT_LIST_HEAD(&crp->cr_strhash);
+ list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
+ memcpy(crp->cr_recdir, name, HEXDIR_LEN);
+ crp->cr_clp = NULL;
+ nn->reclaim_str_hashtbl_size++;
+ }
+ return crp;
+}
+
+void
+nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
+{
+ list_del(&crp->cr_strhash);
+ kfree(crp);
+ nn->reclaim_str_hashtbl_size--;
}
void
-nfs4_release_reclaim(void)
+nfs4_release_reclaim(struct nfsd_net *nn)
{
struct nfs4_client_reclaim *crp = NULL;
int i;
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
- while (!list_empty(&reclaim_str_hashtbl[i])) {
- crp = list_entry(reclaim_str_hashtbl[i].next,
+ while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
+ crp = list_entry(nn->reclaim_str_hashtbl[i].next,
struct nfs4_client_reclaim, cr_strhash);
- list_del(&crp->cr_strhash);
- kfree(crp);
- reclaim_str_hashtbl_size--;
+ nfs4_remove_reclaim_record(crp, nn);
}
}
- BUG_ON(reclaim_str_hashtbl_size);
+ WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
}
/*
* called from OPEN, CLAIM_PREVIOUS with a new clientid. */
struct nfs4_client_reclaim *
-nfsd4_find_reclaim_client(struct nfs4_client *clp)
+nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
{
unsigned int strhashval;
struct nfs4_client_reclaim *crp = NULL;
- dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
- clp->cl_name.len, clp->cl_name.data,
- clp->cl_recdir);
+ dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
- /* find clp->cl_name in reclaim_str_hashtbl */
- strhashval = clientstr_hashval(clp->cl_recdir);
- list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
- if (same_name(crp->cr_recdir, clp->cl_recdir)) {
+ strhashval = clientstr_hashval(recdir);
+ list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
+ if (same_name(crp->cr_recdir, recdir)) {
return crp;
}
}
@@ -4543,12 +4593,12 @@ nfsd4_find_reclaim_client(struct nfs4_client *clp)
* Called from OPEN. Look for clientid in reclaim list.
*/
__be32
-nfs4_check_open_reclaim(clientid_t *clid, bool sessions)
+nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn)
{
struct nfs4_client *clp;
/* find clientid in conf_id_hashtbl */
- clp = find_confirmed_client(clid, sessions);
+ clp = find_confirmed_client(clid, sessions, nn);
if (clp == NULL)
return nfserr_reclaim_bad;
@@ -4557,124 +4607,177 @@ nfs4_check_open_reclaim(clientid_t *clid, bool sessions)
#ifdef CONFIG_NFSD_FAULT_INJECTION
-void nfsd_forget_clients(u64 num)
+u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
{
- struct nfs4_client *clp, *next;
- int count = 0;
-
- nfs4_lock_state();
- list_for_each_entry_safe(clp, next, &client_lru, cl_lru) {
- expire_client(clp);
- if (++count == num)
- break;
- }
- nfs4_unlock_state();
-
- printk(KERN_INFO "NFSD: Forgot %d clients", count);
+ expire_client(clp);
+ return 1;
}
-static void release_lockowner_sop(struct nfs4_stateowner *sop)
+u64 nfsd_print_client(struct nfs4_client *clp, u64 num)
{
- release_lockowner(lockowner(sop));
+ char buf[INET6_ADDRSTRLEN];
+ rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
+ printk(KERN_INFO "NFS Client: %s\n", buf);
+ return 1;
}
-static void release_openowner_sop(struct nfs4_stateowner *sop)
+static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
+ const char *type)
{
- release_openowner(openowner(sop));
+ char buf[INET6_ADDRSTRLEN];
+ rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
+ printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
}
-static int nfsd_release_n_owners(u64 num, bool is_open_owner,
- void (*release_sop)(struct nfs4_stateowner *))
+static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *))
{
- int i, count = 0;
- struct nfs4_stateowner *sop, *next;
+ struct nfs4_openowner *oop;
+ struct nfs4_lockowner *lop, *lo_next;
+ struct nfs4_ol_stateid *stp, *st_next;
+ u64 count = 0;
- for (i = 0; i < OWNER_HASH_SIZE; i++) {
- list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) {
- if (sop->so_is_open_owner != is_open_owner)
- continue;
- release_sop(sop);
- if (++count == num)
- return count;
+ list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
+ list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) {
+ list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) {
+ if (func)
+ func(lop);
+ if (++count == max)
+ return count;
+ }
}
}
+
return count;
}
-void nfsd_forget_locks(u64 num)
+u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
{
- int count;
-
- nfs4_lock_state();
- count = nfsd_release_n_owners(num, false, release_lockowner_sop);
- nfs4_unlock_state();
+ return nfsd_foreach_client_lock(clp, max, release_lockowner);
+}
- printk(KERN_INFO "NFSD: Forgot %d locks", count);
+u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
+{
+ u64 count = nfsd_foreach_client_lock(clp, max, NULL);
+ nfsd_print_count(clp, count, "locked files");
+ return count;
}
-void nfsd_forget_openowners(u64 num)
+static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *))
{
- int count;
+ struct nfs4_openowner *oop, *next;
+ u64 count = 0;
- nfs4_lock_state();
- count = nfsd_release_n_owners(num, true, release_openowner_sop);
- nfs4_unlock_state();
+ list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
+ if (func)
+ func(oop);
+ if (++count == max)
+ break;
+ }
- printk(KERN_INFO "NFSD: Forgot %d open owners", count);
+ return count;
}
-static int nfsd_process_n_delegations(u64 num, struct list_head *list)
+u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
{
- int i, count = 0;
- struct nfs4_file *fp, *fnext;
- struct nfs4_delegation *dp, *dnext;
+ return nfsd_foreach_client_open(clp, max, release_openowner);
+}
- for (i = 0; i < FILE_HASH_SIZE; i++) {
- list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) {
- list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) {
- list_move(&dp->dl_recall_lru, list);
- if (++count == num)
- return count;
- }
- }
- }
+u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max)
+{
+ u64 count = nfsd_foreach_client_open(clp, max, NULL);
+ nfsd_print_count(clp, count, "open files");
+ return count;
+}
+
+static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
+ struct list_head *victims)
+{
+ struct nfs4_delegation *dp, *next;
+ u64 count = 0;
+ list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
+ if (victims)
+ list_move(&dp->dl_recall_lru, victims);
+ if (++count == max)
+ break;
+ }
return count;
}
-void nfsd_forget_delegations(u64 num)
+u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
{
- unsigned int count;
+ struct nfs4_delegation *dp, *next;
LIST_HEAD(victims);
- struct nfs4_delegation *dp, *dnext;
+ u64 count;
spin_lock(&recall_lock);
- count = nfsd_process_n_delegations(num, &victims);
+ count = nfsd_find_all_delegations(clp, max, &victims);
spin_unlock(&recall_lock);
- nfs4_lock_state();
- list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru)
+ list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
unhash_delegation(dp);
- nfs4_unlock_state();
- printk(KERN_INFO "NFSD: Forgot %d delegations", count);
+ return count;
}
-void nfsd_recall_delegations(u64 num)
+u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
{
- unsigned int count;
+ struct nfs4_delegation *dp, *next;
LIST_HEAD(victims);
- struct nfs4_delegation *dp, *dnext;
+ u64 count;
spin_lock(&recall_lock);
- count = nfsd_process_n_delegations(num, &victims);
- list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) {
- list_del(&dp->dl_recall_lru);
+ count = nfsd_find_all_delegations(clp, max, &victims);
+ list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
nfsd_break_one_deleg(dp);
- }
spin_unlock(&recall_lock);
- printk(KERN_INFO "NFSD: Recalled %d delegations", count);
+ return count;
+}
+
+u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max)
+{
+ u64 count = 0;
+
+ spin_lock(&recall_lock);
+ count = nfsd_find_all_delegations(clp, max, NULL);
+ spin_unlock(&recall_lock);
+
+ nfsd_print_count(clp, count, "delegations");
+ return count;
+}
+
+u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
+{
+ struct nfs4_client *clp, *next;
+ u64 count = 0;
+ struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
+
+ if (!nfsd_netns_ready(nn))
+ return 0;
+
+ list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
+ count += func(clp, max - count);
+ if ((max != 0) && (count >= max))
+ break;
+ }
+
+ return count;
+}
+
+struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
+{
+ struct nfs4_client *clp;
+ struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
+
+ if (!nfsd_netns_ready(nn))
+ return NULL;
+
+ list_for_each_entry(clp, &nn->client_lru, cl_lru) {
+ if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
+ return clp;
+ }
+ return NULL;
}
#endif /* CONFIG_NFSD_FAULT_INJECTION */
@@ -4686,27 +4789,10 @@ nfs4_state_init(void)
{
int i;
- for (i = 0; i < CLIENT_HASH_SIZE; i++) {
- INIT_LIST_HEAD(&conf_id_hashtbl[i]);
- INIT_LIST_HEAD(&conf_str_hashtbl[i]);
- INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
- INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
- INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
- }
- for (i = 0; i < SESSION_HASH_SIZE; i++)
- INIT_LIST_HEAD(&sessionid_hashtbl[i]);
for (i = 0; i < FILE_HASH_SIZE; i++) {
INIT_LIST_HEAD(&file_hashtbl[i]);
}
- for (i = 0; i < OWNER_HASH_SIZE; i++) {
- INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
- }
- for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
- INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]);
- INIT_LIST_HEAD(&close_lru);
- INIT_LIST_HEAD(&client_lru);
INIT_LIST_HEAD(&del_recall_lru);
- reclaim_str_hashtbl_size = 0;
}
/*
@@ -4730,12 +4816,100 @@ set_max_delegations(void)
max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
}
-/* initialization to perform when the nfsd service is started: */
+static int nfs4_state_create_net(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ int i;
+
+ nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
+ CLIENT_HASH_SIZE, GFP_KERNEL);
+ if (!nn->conf_id_hashtbl)
+ goto err;
+ nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
+ CLIENT_HASH_SIZE, GFP_KERNEL);
+ if (!nn->unconf_id_hashtbl)
+ goto err_unconf_id;
+ nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
+ OWNER_HASH_SIZE, GFP_KERNEL);
+ if (!nn->ownerstr_hashtbl)
+ goto err_ownerstr;
+ nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) *
+ LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL);
+ if (!nn->lockowner_ino_hashtbl)
+ goto err_lockowner_ino;
+ nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
+ SESSION_HASH_SIZE, GFP_KERNEL);
+ if (!nn->sessionid_hashtbl)
+ goto err_sessionid;
+
+ for (i = 0; i < CLIENT_HASH_SIZE; i++) {
+ INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
+ INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
+ }
+ for (i = 0; i < OWNER_HASH_SIZE; i++)
+ INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
+ for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++)
+ INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]);
+ for (i = 0; i < SESSION_HASH_SIZE; i++)
+ INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
+ nn->conf_name_tree = RB_ROOT;
+ nn->unconf_name_tree = RB_ROOT;
+ INIT_LIST_HEAD(&nn->client_lru);
+ INIT_LIST_HEAD(&nn->close_lru);
+ spin_lock_init(&nn->client_lock);
+
+ INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
+ get_net(net);
+
+ return 0;
+
+err_sessionid:
+ kfree(nn->lockowner_ino_hashtbl);
+err_lockowner_ino:
+ kfree(nn->ownerstr_hashtbl);
+err_ownerstr:
+ kfree(nn->unconf_id_hashtbl);
+err_unconf_id:
+ kfree(nn->conf_id_hashtbl);
+err:
+ return -ENOMEM;
+}
+
+static void
+nfs4_state_destroy_net(struct net *net)
+{
+ int i;
+ struct nfs4_client *clp = NULL;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct rb_node *node, *tmp;
+
+ for (i = 0; i < CLIENT_HASH_SIZE; i++) {
+ while (!list_empty(&nn->conf_id_hashtbl[i])) {
+ clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
+ destroy_client(clp);
+ }
+ }
+
+ node = rb_first(&nn->unconf_name_tree);
+ while (node != NULL) {
+ tmp = node;
+ node = rb_next(tmp);
+ clp = rb_entry(tmp, struct nfs4_client, cl_namenode);
+ rb_erase(tmp, &nn->unconf_name_tree);
+ destroy_client(clp);
+ }
+
+ kfree(nn->sessionid_hashtbl);
+ kfree(nn->lockowner_ino_hashtbl);
+ kfree(nn->ownerstr_hashtbl);
+ kfree(nn->unconf_id_hashtbl);
+ kfree(nn->conf_id_hashtbl);
+ put_net(net);
+}
int
-nfs4_state_start(void)
+nfs4_state_start_net(struct net *net)
{
- struct net *net = &init_net;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int ret;
@@ -4746,18 +4920,32 @@ nfs4_state_start(void)
* to that instead and then do most of the rest of this on a per-net
* basis.
*/
- get_net(net);
+ if (net != &init_net)
+ return -EINVAL;
+
+ ret = nfs4_state_create_net(net);
+ if (ret)
+ return ret;
nfsd4_client_tracking_init(net);
nn->boot_time = get_seconds();
locks_start_grace(net, &nn->nfsd4_manager);
nn->grace_ended = false;
- printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
- nfsd4_grace);
+ printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
+ nn->nfsd4_grace, net);
+ queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
+ return 0;
+}
+
+/* initialization to perform when the nfsd service is started: */
+
+int
+nfs4_state_start(void)
+{
+ int ret;
+
ret = set_callback_cred();
- if (ret) {
- ret = -ENOMEM;
- goto out_recovery;
- }
+ if (ret)
+ return -ENOMEM;
laundry_wq = create_singlethread_workqueue("nfsd4");
if (laundry_wq == NULL) {
ret = -ENOMEM;
@@ -4766,39 +4954,34 @@ nfs4_state_start(void)
ret = nfsd4_create_callback_queue();
if (ret)
goto out_free_laundry;
- queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ);
+
set_max_delegations();
+
return 0;
+
out_free_laundry:
destroy_workqueue(laundry_wq);
out_recovery:
- nfsd4_client_tracking_exit(net);
- put_net(net);
return ret;
}
-static void
-__nfs4_state_shutdown(void)
+/* should be called with the state lock held */
+void
+nfs4_state_shutdown_net(struct net *net)
{
- int i;
- struct nfs4_client *clp = NULL;
struct nfs4_delegation *dp = NULL;
struct list_head *pos, *next, reaplist;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ cancel_delayed_work_sync(&nn->laundromat_work);
+ locks_end_grace(&nn->nfsd4_manager);
- for (i = 0; i < CLIENT_HASH_SIZE; i++) {
- while (!list_empty(&conf_id_hashtbl[i])) {
- clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
- destroy_client(clp);
- }
- while (!list_empty(&unconf_str_hashtbl[i])) {
- clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
- destroy_client(clp);
- }
- }
INIT_LIST_HEAD(&reaplist);
spin_lock(&recall_lock);
list_for_each_safe(pos, next, &del_recall_lru) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
+ if (dp->dl_stid.sc_client->net != net)
+ continue;
list_move(&dp->dl_recall_lru, &reaplist);
}
spin_unlock(&recall_lock);
@@ -4807,22 +4990,14 @@ __nfs4_state_shutdown(void)
unhash_delegation(dp);
}
- nfsd4_client_tracking_exit(&init_net);
- put_net(&init_net);
+ nfsd4_client_tracking_exit(net);
+ nfs4_state_destroy_net(net);
}
void
nfs4_state_shutdown(void)
{
- struct net *net = &init_net;
- struct nfsd_net *nn = net_generic(net, nfsd_net_id);
-
- cancel_delayed_work_sync(&laundromat_work);
destroy_workqueue(laundry_wq);
- locks_end_grace(&nn->nfsd4_manager);
- nfs4_lock_state();
- __nfs4_state_shutdown();
- nfs4_unlock_state();
nfsd4_destroy_callback_queue();
}
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index fd548d155088..0dc11586682f 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -53,6 +53,7 @@
#include "vfs.h"
#include "state.h"
#include "cache.h"
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_XDR
@@ -65,17 +66,17 @@
#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
static __be32
-check_filename(char *str, int len, __be32 err)
+check_filename(char *str, int len)
{
int i;
if (len == 0)
return nfserr_inval;
if (isdotent(str, len))
- return err;
+ return nfserr_badname;
for (i = 0; i < len; i++)
if (str[i] == '/')
- return err;
+ return nfserr_badname;
return 0;
}
@@ -422,6 +423,86 @@ nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access
DECODE_TAIL;
}
+static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
+{
+ DECODE_HEAD;
+ u32 dummy, uid, gid;
+ char *machine_name;
+ int i;
+ int nr_secflavs;
+
+ /* callback_sec_params4 */
+ READ_BUF(4);
+ READ32(nr_secflavs);
+ cbs->flavor = (u32)(-1);
+ for (i = 0; i < nr_secflavs; ++i) {
+ READ_BUF(4);
+ READ32(dummy);
+ switch (dummy) {
+ case RPC_AUTH_NULL:
+ /* Nothing to read */
+ if (cbs->flavor == (u32)(-1))
+ cbs->flavor = RPC_AUTH_NULL;
+ break;
+ case RPC_AUTH_UNIX:
+ READ_BUF(8);
+ /* stamp */
+ READ32(dummy);
+
+ /* machine name */
+ READ32(dummy);
+ READ_BUF(dummy);
+ SAVEMEM(machine_name, dummy);
+
+ /* uid, gid */
+ READ_BUF(8);
+ READ32(uid);
+ READ32(gid);
+
+ /* more gids */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy * 4);
+ if (cbs->flavor == (u32)(-1)) {
+ cbs->uid = uid;
+ cbs->gid = gid;
+ cbs->flavor = RPC_AUTH_UNIX;
+ }
+ break;
+ case RPC_AUTH_GSS:
+ dprintk("RPC_AUTH_GSS callback secflavor "
+ "not supported!\n");
+ READ_BUF(8);
+ /* gcbp_service */
+ READ32(dummy);
+ /* gcbp_handle_from_server */
+ READ32(dummy);
+ READ_BUF(dummy);
+ p += XDR_QUADLEN(dummy);
+ /* gcbp_handle_from_client */
+ READ_BUF(4);
+ READ32(dummy);
+ READ_BUF(dummy);
+ break;
+ default:
+ dprintk("Illegal callback secflavor\n");
+ return nfserr_inval;
+ }
+ }
+ DECODE_TAIL;
+}
+
+static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(bc->bc_cb_program);
+ nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
+
+ DECODE_TAIL;
+}
+
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
{
DECODE_HEAD;
@@ -490,7 +571,7 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create
READ32(create->cr_namelen);
READ_BUF(create->cr_namelen);
SAVEMEM(create->cr_name, create->cr_namelen);
- if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
+ if ((status = check_filename(create->cr_name, create->cr_namelen)))
return status;
status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
@@ -522,7 +603,7 @@ nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
READ32(link->li_namelen);
READ_BUF(link->li_namelen);
SAVEMEM(link->li_name, link->li_namelen);
- if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
+ if ((status = check_filename(link->li_name, link->li_namelen)))
return status;
DECODE_TAIL;
@@ -616,7 +697,7 @@ nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup
READ32(lookup->lo_len);
READ_BUF(lookup->lo_len);
SAVEMEM(lookup->lo_name, lookup->lo_len);
- if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
+ if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
return status;
DECODE_TAIL;
@@ -780,7 +861,7 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
READ32(open->op_fname.len);
READ_BUF(open->op_fname.len);
SAVEMEM(open->op_fname.data, open->op_fname.len);
- if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
+ if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
return status;
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
@@ -795,7 +876,7 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
READ32(open->op_fname.len);
READ_BUF(open->op_fname.len);
SAVEMEM(open->op_fname.data, open->op_fname.len);
- if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
+ if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
return status;
break;
case NFS4_OPEN_CLAIM_FH:
@@ -907,7 +988,7 @@ nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove
READ32(remove->rm_namelen);
READ_BUF(remove->rm_namelen);
SAVEMEM(remove->rm_name, remove->rm_namelen);
- if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
+ if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
return status;
DECODE_TAIL;
@@ -925,9 +1006,9 @@ nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename
READ32(rename->rn_tnamelen);
READ_BUF(rename->rn_tnamelen);
SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
- if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
+ if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
return status;
- if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
+ if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
return status;
DECODE_TAIL;
@@ -954,8 +1035,7 @@ nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
READ32(secinfo->si_namelen);
READ_BUF(secinfo->si_namelen);
SAVEMEM(secinfo->si_name, secinfo->si_namelen);
- status = check_filename(secinfo->si_name, secinfo->si_namelen,
- nfserr_noent);
+ status = check_filename(secinfo->si_name, secinfo->si_namelen);
if (status)
return status;
DECODE_TAIL;
@@ -1026,31 +1106,14 @@ nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_s
static __be32
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
{
-#if 0
- struct nfsd4_compoundargs save = {
- .p = argp->p,
- .end = argp->end,
- .rqstp = argp->rqstp,
- };
- u32 ve_bmval[2];
- struct iattr ve_iattr; /* request */
- struct nfs4_acl *ve_acl; /* request */
-#endif
DECODE_HEAD;
if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
goto out;
/* For convenience's sake, we compare raw xdr'd attributes in
- * nfsd4_proc_verify; however we still decode here just to return
- * correct error in case of bad xdr. */
-#if 0
- status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
- if (status == nfserr_inval) {
- status = nfserrno(status);
- goto out;
- }
-#endif
+ * nfsd4_proc_verify */
+
READ_BUF(4);
READ32(verify->ve_attrlen);
READ_BUF(verify->ve_attrlen);
@@ -1063,7 +1126,6 @@ static __be32
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
int avail;
- int v;
int len;
DECODE_HEAD;
@@ -1087,27 +1149,26 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
__FILE__, __LINE__);
goto xdr_error;
}
- argp->rqstp->rq_vec[0].iov_base = p;
- argp->rqstp->rq_vec[0].iov_len = avail;
- v = 0;
- len = write->wr_buflen;
- while (len > argp->rqstp->rq_vec[v].iov_len) {
- len -= argp->rqstp->rq_vec[v].iov_len;
- v++;
- argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
- argp->pagelist++;
- if (argp->pagelen >= PAGE_SIZE) {
- argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
- argp->pagelen -= PAGE_SIZE;
- } else {
- argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
- argp->pagelen -= len;
- }
+ write->wr_head.iov_base = p;
+ write->wr_head.iov_len = avail;
+ WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
+ write->wr_pagelist = argp->pagelist;
+
+ len = XDR_QUADLEN(write->wr_buflen) << 2;
+ if (len >= avail) {
+ int pages;
+
+ len -= avail;
+
+ pages = len >> PAGE_SHIFT;
+ argp->pagelist += pages;
+ argp->pagelen -= pages * PAGE_SIZE;
+ len -= pages * PAGE_SIZE;
+
+ argp->p = (__be32 *)page_address(argp->pagelist[0]);
+ argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
}
- argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
- argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
- argp->rqstp->rq_vec[v].iov_len = len;
- write->wr_vlen = v+1;
+ argp->p += XDR_QUADLEN(len);
DECODE_TAIL;
}
@@ -1237,11 +1298,7 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
struct nfsd4_create_session *sess)
{
DECODE_HEAD;
-
u32 dummy;
- char *machine_name;
- int i;
- int nr_secflavs;
READ_BUF(16);
COPYMEM(&sess->clientid, 8);
@@ -1282,58 +1339,9 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
goto xdr_error;
}
- READ_BUF(8);
+ READ_BUF(4);
READ32(sess->callback_prog);
-
- /* callback_sec_params4 */
- READ32(nr_secflavs);
- for (i = 0; i < nr_secflavs; ++i) {
- READ_BUF(4);
- READ32(dummy);
- switch (dummy) {
- case RPC_AUTH_NULL:
- /* Nothing to read */
- break;
- case RPC_AUTH_UNIX:
- READ_BUF(8);
- /* stamp */
- READ32(dummy);
-
- /* machine name */
- READ32(dummy);
- READ_BUF(dummy);
- SAVEMEM(machine_name, dummy);
-
- /* uid, gid */
- READ_BUF(8);
- READ32(sess->uid);
- READ32(sess->gid);
-
- /* more gids */
- READ_BUF(4);
- READ32(dummy);
- READ_BUF(dummy * 4);
- break;
- case RPC_AUTH_GSS:
- dprintk("RPC_AUTH_GSS callback secflavor "
- "not supported!\n");
- READ_BUF(8);
- /* gcbp_service */
- READ32(dummy);
- /* gcbp_handle_from_server */
- READ32(dummy);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
- /* gcbp_handle_from_client */
- READ_BUF(4);
- READ32(dummy);
- READ_BUF(dummy);
- break;
- default:
- dprintk("Illegal callback secflavor\n");
- return nfserr_inval;
- }
- }
+ nfsd4_decode_cb_sec(argp, &sess->cb_sec);
DECODE_TAIL;
}
@@ -1528,7 +1536,7 @@ static nfsd4_dec nfsd41_dec_ops[] = {
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
/* new operations for NFSv4.1 */
- [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
@@ -1568,12 +1576,6 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
bool cachethis = false;
int i;
- /*
- * XXX: According to spec, we should check the tag
- * for UTF-8 compliance. I'm postponing this for
- * now because it seems that some clients do use
- * binary tags.
- */
READ_BUF(4);
READ32(argp->taglen);
READ_BUF(argp->taglen + 8);
@@ -1603,38 +1605,8 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
op = &argp->ops[i];
op->replay = NULL;
- /*
- * We can't use READ_BUF() here because we need to handle
- * a missing opcode as an OP_WRITE + 1. So we need to check
- * to see if we're truly at the end of our buffer or if there
- * is another page we need to flip to.
- */
-
- if (argp->p == argp->end) {
- if (argp->pagelen < 4) {
- /* There isn't an opcode still on the wire */
- op->opnum = OP_WRITE + 1;
- op->status = nfserr_bad_xdr;
- argp->opcnt = i+1;
- break;
- }
-
- /*
- * False alarm. We just hit a page boundary, but there
- * is still data available. Move pointer across page
- * boundary. *snip from READ_BUF*
- */
- argp->p = page_address(argp->pagelist[0]);
- argp->pagelist++;
- if (argp->pagelen < PAGE_SIZE) {
- argp->end = argp->p + (argp->pagelen>>2);
- argp->pagelen = 0;
- } else {
- argp->end = argp->p + (PAGE_SIZE>>2);
- argp->pagelen -= PAGE_SIZE;
- }
- }
- op->opnum = ntohl(*argp->p++);
+ READ_BUF(4);
+ READ32(op->opnum);
if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
op->status = ops->decoders[op->opnum](argp, &op->u);
@@ -2014,6 +1986,22 @@ static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
return 0;
}
+
+static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
+{
+ struct path path = exp->ex_path;
+ int err;
+
+ path_get(&path);
+ while (follow_up(&path)) {
+ if (path.dentry != path.mnt->mnt_root)
+ break;
+ }
+ err = vfs_getattr(path.mnt, path.dentry, stat);
+ path_put(&path);
+ return err;
+}
+
/*
* Note: @fhp can be NULL; in this case, we might have to compose the filehandle
* ourselves.
@@ -2048,6 +2036,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
.mnt = exp->ex_path.mnt,
.dentry = dentry,
};
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
@@ -2208,7 +2197,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
if ((buflen -= 4) < 0)
goto out_resource;
- WRITE32(nfsd4_lease);
+ WRITE32(nn->nfsd4_lease);
}
if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
if ((buflen -= 4) < 0)
@@ -2430,18 +2419,8 @@ out_acl:
* and this is the root of a cross-mounted filesystem.
*/
if (ignore_crossmnt == 0 &&
- dentry == exp->ex_path.mnt->mnt_root) {
- struct path path = exp->ex_path;
- path_get(&path);
- while (follow_up(&path)) {
- if (path.dentry != path.mnt->mnt_root)
- break;
- }
- err = vfs_getattr(path.mnt, path.dentry, &stat);
- path_put(&path);
- if (err)
- goto out_nfserr;
- }
+ dentry == exp->ex_path.mnt->mnt_root)
+ get_parent_attributes(exp, &stat);
WRITE64(stat.ino);
}
if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
@@ -2927,7 +2906,8 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
struct nfsd4_read *read)
{
u32 eof;
- int v, pn;
+ int v;
+ struct page *page;
unsigned long maxcount;
long len;
__be32 *p;
@@ -2946,11 +2926,15 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
len = maxcount;
v = 0;
while (len > 0) {
- pn = resp->rqstp->rq_resused++;
- resp->rqstp->rq_vec[v].iov_base =
- page_address(resp->rqstp->rq_respages[pn]);
+ page = *(resp->rqstp->rq_next_page);
+ if (!page) { /* ran out of pages */
+ maxcount -= len;
+ break;
+ }
+ resp->rqstp->rq_vec[v].iov_base = page_address(page);
resp->rqstp->rq_vec[v].iov_len =
len < PAGE_SIZE ? len : PAGE_SIZE;
+ resp->rqstp->rq_next_page++;
v++;
len -= PAGE_SIZE;
}
@@ -2996,8 +2980,10 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd
return nfserr;
if (resp->xbuf->page_len)
return nfserr_resource;
+ if (!*resp->rqstp->rq_next_page)
+ return nfserr_resource;
- page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
+ page = page_address(*(resp->rqstp->rq_next_page++));
maxcount = PAGE_SIZE;
RESERVE_SPACE(4);
@@ -3045,6 +3031,8 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
return nfserr;
if (resp->xbuf->page_len)
return nfserr_resource;
+ if (!*resp->rqstp->rq_next_page)
+ return nfserr_resource;
RESERVE_SPACE(NFS4_VERIFIER_SIZE);
savep = p;
@@ -3071,7 +3059,7 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
goto err_no_verf;
}
- page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
+ page = page_address(*(resp->rqstp->rq_next_page++));
readdir->common.err = 0;
readdir->buflen = maxcount;
readdir->buffer = page;
@@ -3094,8 +3082,8 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
p = readdir->buffer;
*p++ = 0; /* no more entries */
*p++ = htonl(readdir->common.err == nfserr_eof);
- resp->xbuf->page_len = ((char*)p) - (char*)page_address(
- resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
+ resp->xbuf->page_len = ((char*)p) -
+ (char*)page_address(*(resp->rqstp->rq_next_page-1));
/* Use rest of head for padding and remaining ops: */
resp->xbuf->tail[0].iov_base = tailbase;
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index dab350dfc376..74934284d9a7 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -19,7 +19,7 @@
#include "idmap.h"
#include "nfsd.h"
#include "cache.h"
-#include "fault_inject.h"
+#include "state.h"
#include "netns.h"
/*
@@ -186,9 +186,6 @@ static struct file_operations supported_enctypes_ops = {
};
#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
-extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
-extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
-
static const struct file_operations pool_stats_operations = {
.open = nfsd_pool_stats_open,
.read = seq_read,
@@ -399,6 +396,8 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size)
{
char *mesg = buf;
int rv;
+ struct net *net = &init_net;
+
if (size > 0) {
int newthreads;
rv = get_int(&mesg, &newthreads);
@@ -406,11 +405,11 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size)
return rv;
if (newthreads < 0)
return -EINVAL;
- rv = nfsd_svc(newthreads);
+ rv = nfsd_svc(newthreads, net);
if (rv < 0)
return rv;
} else
- rv = nfsd_nrthreads();
+ rv = nfsd_nrthreads(net);
return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
}
@@ -448,9 +447,10 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
int len;
int npools;
int *nthreads;
+ struct net *net = &init_net;
mutex_lock(&nfsd_mutex);
- npools = nfsd_nrpools();
+ npools = nfsd_nrpools(net);
if (npools == 0) {
/*
* NFS is shut down. The admin can start it by
@@ -478,12 +478,12 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
if (nthreads[i] < 0)
goto out_free;
}
- rv = nfsd_set_nrthreads(i, nthreads);
+ rv = nfsd_set_nrthreads(i, nthreads, net);
if (rv)
goto out_free;
}
- rv = nfsd_get_nrthreads(npools, nthreads);
+ rv = nfsd_get_nrthreads(npools, nthreads, net);
if (rv)
goto out_free;
@@ -510,11 +510,13 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
unsigned minor;
ssize_t tlen = 0;
char *sep;
+ struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
if (size>0) {
- if (nfsd_serv)
+ if (nn->nfsd_serv)
/* Cannot change versions without updating
- * nfsd_serv->sv_xdrsize, and reallocing
+ * nn->nfsd_serv->sv_xdrsize, and reallocing
* rq_argp and rq_resp
*/
return -EBUSY;
@@ -645,11 +647,13 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size)
* Zero-length write. Return a list of NFSD's current listener
* transports.
*/
-static ssize_t __write_ports_names(char *buf)
+static ssize_t __write_ports_names(char *buf, struct net *net)
{
- if (nfsd_serv == NULL)
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (nn->nfsd_serv == NULL)
return 0;
- return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
+ return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
}
/*
@@ -657,28 +661,28 @@ static ssize_t __write_ports_names(char *buf)
* a socket of a supported family/protocol, and we use it as an
* nfsd listener.
*/
-static ssize_t __write_ports_addfd(char *buf)
+static ssize_t __write_ports_addfd(char *buf, struct net *net)
{
char *mesg = buf;
int fd, err;
- struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
err = get_int(&mesg, &fd);
if (err != 0 || fd < 0)
return -EINVAL;
- err = nfsd_create_serv();
+ err = nfsd_create_serv(net);
if (err != 0)
return err;
- err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
+ err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
if (err < 0) {
nfsd_destroy(net);
return err;
}
/* Decrease the count, but don't shut down the service */
- nfsd_serv->sv_nrthreads--;
+ nn->nfsd_serv->sv_nrthreads--;
return err;
}
@@ -686,12 +690,12 @@ static ssize_t __write_ports_addfd(char *buf)
* A transport listener is added by writing it's transport name and
* a port number.
*/
-static ssize_t __write_ports_addxprt(char *buf)
+static ssize_t __write_ports_addxprt(char *buf, struct net *net)
{
char transport[16];
struct svc_xprt *xprt;
int port, err;
- struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
if (sscanf(buf, "%15s %5u", transport, &port) != 2)
return -EINVAL;
@@ -699,25 +703,25 @@ static ssize_t __write_ports_addxprt(char *buf)
if (port < 1 || port > USHRT_MAX)
return -EINVAL;
- err = nfsd_create_serv();
+ err = nfsd_create_serv(net);
if (err != 0)
return err;
- err = svc_create_xprt(nfsd_serv, transport, net,
+ err = svc_create_xprt(nn->nfsd_serv, transport, net,
PF_INET, port, SVC_SOCK_ANONYMOUS);
if (err < 0)
goto out_err;
- err = svc_create_xprt(nfsd_serv, transport, net,
+ err = svc_create_xprt(nn->nfsd_serv, transport, net,
PF_INET6, port, SVC_SOCK_ANONYMOUS);
if (err < 0 && err != -EAFNOSUPPORT)
goto out_close;
/* Decrease the count, but don't shut down the service */
- nfsd_serv->sv_nrthreads--;
+ nn->nfsd_serv->sv_nrthreads--;
return 0;
out_close:
- xprt = svc_find_xprt(nfsd_serv, transport, net, PF_INET, port);
+ xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);
if (xprt != NULL) {
svc_close_xprt(xprt);
svc_xprt_put(xprt);
@@ -727,16 +731,17 @@ out_err:
return err;
}
-static ssize_t __write_ports(struct file *file, char *buf, size_t size)
+static ssize_t __write_ports(struct file *file, char *buf, size_t size,
+ struct net *net)
{
if (size == 0)
- return __write_ports_names(buf);
+ return __write_ports_names(buf, net);
if (isdigit(buf[0]))
- return __write_ports_addfd(buf);
+ return __write_ports_addfd(buf, net);
if (isalpha(buf[0]))
- return __write_ports_addxprt(buf);
+ return __write_ports_addxprt(buf, net);
return -EINVAL;
}
@@ -787,9 +792,10 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size)
static ssize_t write_ports(struct file *file, char *buf, size_t size)
{
ssize_t rv;
+ struct net *net = &init_net;
mutex_lock(&nfsd_mutex);
- rv = __write_ports(file, buf, size);
+ rv = __write_ports(file, buf, size, net);
mutex_unlock(&nfsd_mutex);
return rv;
}
@@ -821,6 +827,9 @@ int nfsd_max_blksize;
static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
{
char *mesg = buf;
+ struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
if (size > 0) {
int bsize;
int rv = get_int(&mesg, &bsize);
@@ -835,7 +844,7 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
bsize = NFSSVC_MAXBLKSIZE;
bsize &= ~(1024-1);
mutex_lock(&nfsd_mutex);
- if (nfsd_serv) {
+ if (nn->nfsd_serv) {
mutex_unlock(&nfsd_mutex);
return -EBUSY;
}
@@ -848,13 +857,14 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
}
#ifdef CONFIG_NFSD_V4
-static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
+static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
+ time_t *time, struct nfsd_net *nn)
{
char *mesg = buf;
int rv, i;
if (size > 0) {
- if (nfsd_serv)
+ if (nn->nfsd_serv)
return -EBUSY;
rv = get_int(&mesg, &i);
if (rv)
@@ -879,12 +889,13 @@ static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, tim
return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
}
-static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
+static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size,
+ time_t *time, struct nfsd_net *nn)
{
ssize_t rv;
mutex_lock(&nfsd_mutex);
- rv = __nfsd4_write_time(file, buf, size, time);
+ rv = __nfsd4_write_time(file, buf, size, time, nn);
mutex_unlock(&nfsd_mutex);
return rv;
}
@@ -912,7 +923,8 @@ static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_
*/
static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
{
- return nfsd4_write_time(file, buf, size, &nfsd4_lease);
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);
}
/**
@@ -927,17 +939,19 @@ static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
*/
static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
{
- return nfsd4_write_time(file, buf, size, &nfsd4_grace);
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
+ return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);
}
-static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
+static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size,
+ struct nfsd_net *nn)
{
char *mesg = buf;
char *recdir;
int len, status;
if (size > 0) {
- if (nfsd_serv)
+ if (nn->nfsd_serv)
return -EBUSY;
if (size > PATH_MAX || buf[size-1] != '\n')
return -EINVAL;
@@ -981,9 +995,10 @@ static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
{
ssize_t rv;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
mutex_lock(&nfsd_mutex);
- rv = __write_recoverydir(file, buf, size);
+ rv = __write_recoverydir(file, buf, size, nn);
mutex_unlock(&nfsd_mutex);
return rv;
}
@@ -1063,6 +1078,7 @@ int nfsd_net_id;
static __net_init int nfsd_init_net(struct net *net)
{
int retval;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
retval = nfsd_export_init(net);
if (retval)
@@ -1070,6 +1086,8 @@ static __net_init int nfsd_init_net(struct net *net)
retval = nfsd_idmap_init(net);
if (retval)
goto out_idmap_error;
+ nn->nfsd4_lease = 90; /* default lease time */
+ nn->nfsd4_grace = 90;
return 0;
out_idmap_error:
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 80d5ce40aadb..de23db255c69 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -55,7 +55,6 @@ extern struct svc_version nfsd_version2, nfsd_version3,
nfsd_version4;
extern u32 nfsd_supported_minorversion;
extern struct mutex nfsd_mutex;
-extern struct svc_serv *nfsd_serv;
extern spinlock_t nfsd_drc_lock;
extern unsigned int nfsd_drc_max_mem;
extern unsigned int nfsd_drc_mem_used;
@@ -65,26 +64,17 @@ extern const struct seq_operations nfs_exports_op;
/*
* Function prototypes.
*/
-int nfsd_svc(int nrservs);
+int nfsd_svc(int nrservs, struct net *net);
int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
-int nfsd_nrthreads(void);
-int nfsd_nrpools(void);
-int nfsd_get_nrthreads(int n, int *);
-int nfsd_set_nrthreads(int n, int *);
+int nfsd_nrthreads(struct net *);
+int nfsd_nrpools(struct net *);
+int nfsd_get_nrthreads(int n, int *, struct net *);
+int nfsd_set_nrthreads(int n, int *, struct net *);
int nfsd_pool_stats_open(struct inode *, struct file *);
int nfsd_pool_stats_release(struct inode *, struct file *);
-static inline void nfsd_destroy(struct net *net)
-{
- int destroy = (nfsd_serv->sv_nrthreads == 1);
-
- if (destroy)
- svc_shutdown_net(nfsd_serv, net);
- svc_destroy(nfsd_serv);
- if (destroy)
- nfsd_serv = NULL;
-}
+void nfsd_destroy(struct net *net);
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
#ifdef CONFIG_NFSD_V2_ACL
@@ -103,7 +93,7 @@ enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
int nfsd_vers(int vers, enum vers_op change);
int nfsd_minorversion(u32 minorversion, enum vers_op change);
void nfsd_reset_versions(void);
-int nfsd_create_serv(void);
+int nfsd_create_serv(struct net *net);
extern int nfsd_max_blksize;
@@ -121,7 +111,9 @@ void nfs4_state_init(void);
int nfsd4_init_slabs(void);
void nfsd4_free_slabs(void);
int nfs4_state_start(void);
+int nfs4_state_start_net(struct net *net);
void nfs4_state_shutdown(void);
+void nfs4_state_shutdown_net(struct net *net);
void nfs4_reset_lease(time_t leasetime);
int nfs4_reset_recoverydir(char *recdir);
char * nfs4_recoverydir(void);
@@ -130,7 +122,9 @@ static inline void nfs4_state_init(void) { }
static inline int nfsd4_init_slabs(void) { return 0; }
static inline void nfsd4_free_slabs(void) { }
static inline int nfs4_state_start(void) { return 0; }
+static inline int nfs4_state_start_net(struct net *net) { return 0; }
static inline void nfs4_state_shutdown(void) { }
+static inline void nfs4_state_shutdown_net(struct net *net) { }
static inline void nfs4_reset_lease(time_t leasetime) { }
static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
static inline char * nfs4_recoverydir(void) {return NULL; }
@@ -265,16 +259,8 @@ void nfsd_lockd_shutdown(void);
/* Check for dir entries '.' and '..' */
#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
-/*
- * Time of server startup
- */
-extern struct timeval nfssvc_boot;
-
#ifdef CONFIG_NFSD_V4
-extern time_t nfsd4_lease;
-extern time_t nfsd4_grace;
-
/* before processing a COMPOUND operation, we have to check that there
* is enough space in the buffer for XDR encode to succeed. otherwise,
* we might process an operation with side effects, and be unable to
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 032af381b3aa..814afaa4458a 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -572,7 +572,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
if (inode)
_fh_update(fhp, exp, dentry);
- if (fhp->fh_handle.fh_fileid_type == 255) {
+ if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
fh_put(fhp);
return nfserr_opnotsupp;
}
@@ -603,7 +603,7 @@ fh_update(struct svc_fh *fhp)
goto out;
_fh_update(fhp, fhp->fh_export, dentry);
- if (fhp->fh_handle.fh_fileid_type == 255)
+ if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
return nfserr_opnotsupp;
}
out:
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 2013aa001dab..cee62ab9d4a3 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -11,7 +11,6 @@
#include <linux/module.h>
#include <linux/fs_struct.h>
#include <linux/swap.h>
-#include <linux/nsproxy.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svcsock.h>
@@ -22,19 +21,19 @@
#include "nfsd.h"
#include "cache.h"
#include "vfs.h"
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_SVC
extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
-struct timeval nfssvc_boot;
/*
- * nfsd_mutex protects nfsd_serv -- both the pointer itself and the members
+ * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
* of the svc_serv struct. In particular, ->sv_nrthreads but also to some
* extent ->sv_temp_socks and ->sv_permsocks. It also protects nfsdstats.th_cnt
*
- * If (out side the lock) nfsd_serv is non-NULL, then it must point to a
+ * If (out side the lock) nn->nfsd_serv is non-NULL, then it must point to a
* properly initialised 'struct svc_serv' with ->sv_nrthreads > 0. That number
* of nfsd threads must exist and each must listed in ->sp_all_threads in each
* entry of ->sv_pools[].
@@ -52,7 +51,6 @@ struct timeval nfssvc_boot;
* nfsd_versions
*/
DEFINE_MUTEX(nfsd_mutex);
-struct svc_serv *nfsd_serv;
/*
* nfsd_drc_lock protects nfsd_drc_max_pages and nfsd_drc_pages_used.
@@ -173,28 +171,32 @@ int nfsd_minorversion(u32 minorversion, enum vers_op change)
*/
#define NFSD_MAXSERVS 8192
-int nfsd_nrthreads(void)
+int nfsd_nrthreads(struct net *net)
{
int rv = 0;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
mutex_lock(&nfsd_mutex);
- if (nfsd_serv)
- rv = nfsd_serv->sv_nrthreads;
+ if (nn->nfsd_serv)
+ rv = nn->nfsd_serv->sv_nrthreads;
mutex_unlock(&nfsd_mutex);
return rv;
}
-static int nfsd_init_socks(void)
+static int nfsd_init_socks(struct net *net)
{
int error;
- if (!list_empty(&nfsd_serv->sv_permsocks))
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (!list_empty(&nn->nfsd_serv->sv_permsocks))
return 0;
- error = svc_create_xprt(nfsd_serv, "udp", &init_net, PF_INET, NFS_PORT,
+ error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
SVC_SOCK_DEFAULTS);
if (error < 0)
return error;
- error = svc_create_xprt(nfsd_serv, "tcp", &init_net, PF_INET, NFS_PORT,
+ error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
SVC_SOCK_DEFAULTS);
if (error < 0)
return error;
@@ -202,14 +204,15 @@ static int nfsd_init_socks(void)
return 0;
}
-static bool nfsd_up = false;
+static int nfsd_users = 0;
-static int nfsd_startup(int nrservs)
+static int nfsd_startup_generic(int nrservs)
{
int ret;
- if (nfsd_up)
+ if (nfsd_users++)
return 0;
+
/*
* Readahead param cache - will no-op if it already exists.
* (Note therefore results will be suboptimal if number of
@@ -218,43 +221,79 @@ static int nfsd_startup(int nrservs)
ret = nfsd_racache_init(2*nrservs);
if (ret)
return ret;
- ret = nfsd_init_socks();
+ ret = nfs4_state_start();
if (ret)
goto out_racache;
- ret = lockd_up(&init_net);
+ return 0;
+
+out_racache:
+ nfsd_racache_shutdown();
+ return ret;
+}
+
+static void nfsd_shutdown_generic(void)
+{
+ if (--nfsd_users)
+ return;
+
+ nfs4_state_shutdown();
+ nfsd_racache_shutdown();
+}
+
+static int nfsd_startup_net(int nrservs, struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ int ret;
+
+ if (nn->nfsd_net_up)
+ return 0;
+
+ ret = nfsd_startup_generic(nrservs);
if (ret)
- goto out_racache;
- ret = nfs4_state_start();
+ return ret;
+ ret = nfsd_init_socks(net);
+ if (ret)
+ goto out_socks;
+ ret = lockd_up(net);
+ if (ret)
+ goto out_socks;
+ ret = nfs4_state_start_net(net);
if (ret)
goto out_lockd;
- nfsd_up = true;
+
+ nn->nfsd_net_up = true;
return 0;
+
out_lockd:
- lockd_down(&init_net);
-out_racache:
- nfsd_racache_shutdown();
+ lockd_down(net);
+out_socks:
+ nfsd_shutdown_generic();
return ret;
}
-static void nfsd_shutdown(void)
+static void nfsd_shutdown_net(struct net *net)
{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ nfs4_state_shutdown_net(net);
+ lockd_down(net);
+ nn->nfsd_net_up = false;
+ nfsd_shutdown_generic();
+}
+
+static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
/*
* write_ports can create the server without actually starting
* any threads--if we get shut down before any threads are
* started, then nfsd_last_thread will be run before any of this
* other initialization has been done.
*/
- if (!nfsd_up)
+ if (!nn->nfsd_net_up)
return;
- nfs4_state_shutdown();
- lockd_down(&init_net);
- nfsd_racache_shutdown();
- nfsd_up = false;
-}
-
-static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
-{
- nfsd_shutdown();
+ nfsd_shutdown_net(net);
svc_rpcb_cleanup(serv, net);
@@ -327,69 +366,84 @@ static int nfsd_get_default_max_blksize(void)
return ret;
}
-int nfsd_create_serv(void)
+int nfsd_create_serv(struct net *net)
{
int error;
- struct net *net = current->nsproxy->net_ns;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
WARN_ON(!mutex_is_locked(&nfsd_mutex));
- if (nfsd_serv) {
- svc_get(nfsd_serv);
+ if (nn->nfsd_serv) {
+ svc_get(nn->nfsd_serv);
return 0;
}
if (nfsd_max_blksize == 0)
nfsd_max_blksize = nfsd_get_default_max_blksize();
nfsd_reset_versions();
- nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
+ nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
nfsd_last_thread, nfsd, THIS_MODULE);
- if (nfsd_serv == NULL)
+ if (nn->nfsd_serv == NULL)
return -ENOMEM;
- error = svc_bind(nfsd_serv, net);
+ error = svc_bind(nn->nfsd_serv, net);
if (error < 0) {
- svc_destroy(nfsd_serv);
+ svc_destroy(nn->nfsd_serv);
return error;
}
set_max_drc();
- do_gettimeofday(&nfssvc_boot); /* record boot time */
+ do_gettimeofday(&nn->nfssvc_boot); /* record boot time */
return 0;
}
-int nfsd_nrpools(void)
+int nfsd_nrpools(struct net *net)
{
- if (nfsd_serv == NULL)
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (nn->nfsd_serv == NULL)
return 0;
else
- return nfsd_serv->sv_nrpools;
+ return nn->nfsd_serv->sv_nrpools;
}
-int nfsd_get_nrthreads(int n, int *nthreads)
+int nfsd_get_nrthreads(int n, int *nthreads, struct net *net)
{
int i = 0;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- if (nfsd_serv != NULL) {
- for (i = 0; i < nfsd_serv->sv_nrpools && i < n; i++)
- nthreads[i] = nfsd_serv->sv_pools[i].sp_nrthreads;
+ if (nn->nfsd_serv != NULL) {
+ for (i = 0; i < nn->nfsd_serv->sv_nrpools && i < n; i++)
+ nthreads[i] = nn->nfsd_serv->sv_pools[i].sp_nrthreads;
}
return 0;
}
-int nfsd_set_nrthreads(int n, int *nthreads)
+void nfsd_destroy(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ int destroy = (nn->nfsd_serv->sv_nrthreads == 1);
+
+ if (destroy)
+ svc_shutdown_net(nn->nfsd_serv, net);
+ svc_destroy(nn->nfsd_serv);
+ if (destroy)
+ nn->nfsd_serv = NULL;
+}
+
+int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
{
int i = 0;
int tot = 0;
int err = 0;
- struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
WARN_ON(!mutex_is_locked(&nfsd_mutex));
- if (nfsd_serv == NULL || n <= 0)
+ if (nn->nfsd_serv == NULL || n <= 0)
return 0;
- if (n > nfsd_serv->sv_nrpools)
- n = nfsd_serv->sv_nrpools;
+ if (n > nn->nfsd_serv->sv_nrpools)
+ n = nn->nfsd_serv->sv_nrpools;
/* enforce a global maximum number of threads */
tot = 0;
@@ -419,9 +473,9 @@ int nfsd_set_nrthreads(int n, int *nthreads)
nthreads[0] = 1;
/* apply the new numbers */
- svc_get(nfsd_serv);
+ svc_get(nn->nfsd_serv);
for (i = 0; i < n; i++) {
- err = svc_set_num_threads(nfsd_serv, &nfsd_serv->sv_pools[i],
+ err = svc_set_num_threads(nn->nfsd_serv, &nn->nfsd_serv->sv_pools[i],
nthreads[i]);
if (err)
break;
@@ -436,11 +490,11 @@ int nfsd_set_nrthreads(int n, int *nthreads)
* this is the first time nrservs is nonzero.
*/
int
-nfsd_svc(int nrservs)
+nfsd_svc(int nrservs, struct net *net)
{
int error;
bool nfsd_up_before;
- struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
mutex_lock(&nfsd_mutex);
dprintk("nfsd: creating service\n");
@@ -449,29 +503,29 @@ nfsd_svc(int nrservs)
if (nrservs > NFSD_MAXSERVS)
nrservs = NFSD_MAXSERVS;
error = 0;
- if (nrservs == 0 && nfsd_serv == NULL)
+ if (nrservs == 0 && nn->nfsd_serv == NULL)
goto out;
- error = nfsd_create_serv();
+ error = nfsd_create_serv(net);
if (error)
goto out;
- nfsd_up_before = nfsd_up;
+ nfsd_up_before = nn->nfsd_net_up;
- error = nfsd_startup(nrservs);
+ error = nfsd_startup_net(nrservs, net);
if (error)
goto out_destroy;
- error = svc_set_num_threads(nfsd_serv, NULL, nrservs);
+ error = svc_set_num_threads(nn->nfsd_serv, NULL, nrservs);
if (error)
goto out_shutdown;
- /* We are holding a reference to nfsd_serv which
+ /* We are holding a reference to nn->nfsd_serv which
* we don't want to count in the return value,
* so subtract 1
*/
- error = nfsd_serv->sv_nrthreads - 1;
+ error = nn->nfsd_serv->sv_nrthreads - 1;
out_shutdown:
if (error < 0 && !nfsd_up_before)
- nfsd_shutdown();
+ nfsd_shutdown_net(net);
out_destroy:
nfsd_destroy(net); /* Release server */
out:
@@ -487,6 +541,8 @@ static int
nfsd(void *vrqstp)
{
struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp;
+ struct svc_xprt *perm_sock = list_entry(rqstp->rq_server->sv_permsocks.next, typeof(struct svc_xprt), xpt_list);
+ struct net *net = perm_sock->xpt_net;
int err;
/* Lock module and set up kernel thread */
@@ -551,7 +607,7 @@ out:
/* Release the thread */
svc_exit_thread(rqstp);
- nfsd_destroy(&init_net);
+ nfsd_destroy(net);
/* Release module */
mutex_unlock(&nfsd_mutex);
@@ -640,21 +696,24 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
}
/* Store reply in cache. */
- nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1);
+ nfsd_cache_update(rqstp, rqstp->rq_cachetype, statp + 1);
return 1;
}
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
{
int ret;
+ struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
mutex_lock(&nfsd_mutex);
- if (nfsd_serv == NULL) {
+ if (nn->nfsd_serv == NULL) {
mutex_unlock(&nfsd_mutex);
return -ENODEV;
}
/* bump up the psudo refcount while traversing */
- svc_get(nfsd_serv);
- ret = svc_pool_stats_open(nfsd_serv, file);
+ svc_get(nn->nfsd_serv);
+ ret = svc_pool_stats_open(nn->nfsd_serv, file);
mutex_unlock(&nfsd_mutex);
return ret;
}
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 65ec595e2226..979b42106979 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -246,7 +246,7 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd_readargs *args)
{
unsigned int len;
- int v,pn;
+ int v;
if (!(p = decode_fh(p, &args->fh)))
return 0;
@@ -262,8 +262,9 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
*/
v=0;
while (len > 0) {
- pn = rqstp->rq_resused++;
- rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
+ struct page *p = *(rqstp->rq_next_page++);
+
+ rqstp->rq_vec[v].iov_base = page_address(p);
rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
len -= rqstp->rq_vec[v].iov_len;
v++;
@@ -355,7 +356,7 @@ nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readli
{
if (!(p = decode_fh(p, &args->fh)))
return 0;
- args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+ args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
}
@@ -396,7 +397,7 @@ nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
if (args->count > PAGE_SIZE)
args->count = PAGE_SIZE;
- args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
+ args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
}
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index e036894bce57..d1c229feed52 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -150,6 +150,12 @@ struct nfsd4_channel_attrs {
u32 rdma_attrs;
};
+struct nfsd4_cb_sec {
+ u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
+ u32 uid;
+ u32 gid;
+};
+
struct nfsd4_create_session {
clientid_t clientid;
struct nfs4_sessionid sessionid;
@@ -158,8 +164,12 @@ struct nfsd4_create_session {
struct nfsd4_channel_attrs fore_channel;
struct nfsd4_channel_attrs back_channel;
u32 callback_prog;
- u32 uid;
- u32 gid;
+ struct nfsd4_cb_sec cb_sec;
+};
+
+struct nfsd4_backchannel_ctl {
+ u32 bc_cb_program;
+ struct nfsd4_cb_sec bc_cb_sec;
};
struct nfsd4_bind_conn_to_session {
@@ -192,6 +202,7 @@ struct nfsd4_session {
struct nfs4_sessionid se_sessionid;
struct nfsd4_channel_attrs se_fchannel;
struct nfsd4_channel_attrs se_bchannel;
+ struct nfsd4_cb_sec se_cb_sec;
struct list_head se_conns;
u32 se_cb_prog;
u32 se_cb_seq_nr;
@@ -221,13 +232,12 @@ struct nfsd4_sessionid {
*/
struct nfs4_client {
struct list_head cl_idhash; /* hash by cl_clientid.id */
- struct list_head cl_strhash; /* hash by cl_name */
+ struct rb_node cl_namenode; /* link into by-name trees */
struct list_head cl_openowners;
struct idr cl_stateids; /* stateid lookup */
struct list_head cl_delegations;
struct list_head cl_lru; /* tail queue */
struct xdr_netobj cl_name; /* id generated by client */
- char cl_recdir[HEXDIR_LEN]; /* recovery dir */
nfs4_verifier cl_verifier; /* generated by client */
time_t cl_time; /* time of last lease renewal */
struct sockaddr_storage cl_addr; /* client ipaddress */
@@ -242,9 +252,11 @@ struct nfs4_client {
#define NFSD4_CLIENT_CB_KILL (1)
#define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
#define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
+#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
1 << NFSD4_CLIENT_CB_KILL)
unsigned long cl_flags;
+ struct rpc_cred *cl_cb_cred;
struct rpc_clnt *cl_cb_client;
u32 cl_cb_ident;
#define NFSD4_CB_UP 0
@@ -271,6 +283,7 @@ struct nfs4_client {
unsigned long cl_cb_slot_busy;
struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
/* wait here for slots */
+ struct net *net;
};
static inline void
@@ -292,6 +305,7 @@ is_client_expired(struct nfs4_client *clp)
*/
struct nfs4_client_reclaim {
struct list_head cr_strhash; /* hash by cr_name */
+ struct nfs4_client *cr_clp; /* pointer to associated clp */
char cr_recdir[HEXDIR_LEN]; /* recover dir */
};
@@ -452,25 +466,26 @@ extern __be32 nfs4_preprocess_stateid_op(struct net *net,
stateid_t *stateid, int flags, struct file **filp);
extern void nfs4_lock_state(void);
extern void nfs4_unlock_state(void);
-extern int nfs4_in_grace(void);
-extern void nfs4_release_reclaim(void);
-extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct nfs4_client *crp);
-extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions);
+void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
+extern void nfs4_release_reclaim(struct nfsd_net *);
+extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
+ struct nfsd_net *nn);
+extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn);
extern void nfs4_free_openowner(struct nfs4_openowner *);
extern void nfs4_free_lockowner(struct nfs4_lockowner *);
extern int set_callback_cred(void);
+extern void nfsd4_init_callback(struct nfsd4_callback *);
extern void nfsd4_probe_callback(struct nfs4_client *clp);
extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
-extern void nfsd4_do_callback_rpc(struct work_struct *);
extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
extern int nfsd4_create_callback_queue(void);
extern void nfsd4_destroy_callback_queue(void);
extern void nfsd4_shutdown_callback(struct nfs4_client *);
extern void nfs4_put_delegation(struct nfs4_delegation *dp);
-extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
-extern int nfs4_client_to_reclaim(const char *name);
-extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
+extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
+ struct nfsd_net *nn);
+extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
extern void release_session_client(struct nfsd4_session *);
extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
@@ -480,5 +495,28 @@ extern void nfsd4_client_tracking_exit(struct net *net);
extern void nfsd4_client_record_create(struct nfs4_client *clp);
extern void nfsd4_client_record_remove(struct nfs4_client *clp);
extern int nfsd4_client_record_check(struct nfs4_client *clp);
-extern void nfsd4_record_grace_done(struct net *net, time_t boot_time);
+extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time);
+
+/* nfs fault injection functions */
+#ifdef CONFIG_NFSD_FAULT_INJECTION
+int nfsd_fault_inject_init(void);
+void nfsd_fault_inject_cleanup(void);
+u64 nfsd_for_n_state(u64, u64 (*)(struct nfs4_client *, u64));
+struct nfs4_client *nfsd_find_client(struct sockaddr_storage *, size_t);
+
+u64 nfsd_forget_client(struct nfs4_client *, u64);
+u64 nfsd_forget_client_locks(struct nfs4_client*, u64);
+u64 nfsd_forget_client_openowners(struct nfs4_client *, u64);
+u64 nfsd_forget_client_delegations(struct nfs4_client *, u64);
+u64 nfsd_recall_client_delegations(struct nfs4_client *, u64);
+
+u64 nfsd_print_client(struct nfs4_client *, u64);
+u64 nfsd_print_client_locks(struct nfs4_client *, u64);
+u64 nfsd_print_client_openowners(struct nfs4_client *, u64);
+u64 nfsd_print_client_delegations(struct nfs4_client *, u64);
+#else /* CONFIG_NFSD_FAULT_INJECTION */
+static inline int nfsd_fault_inject_init(void) { return 0; }
+static inline void nfsd_fault_inject_cleanup(void) {}
+#endif /* CONFIG_NFSD_FAULT_INJECTION */
+
#endif /* NFSD4_STATE_H */
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index c120b48ec305..d586117fa94a 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -886,7 +886,7 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
struct splice_desc *sd)
{
struct svc_rqst *rqstp = sd->u.data;
- struct page **pp = rqstp->rq_respages + rqstp->rq_resused;
+ struct page **pp = rqstp->rq_next_page;
struct page *page = buf->page;
size_t size;
@@ -894,17 +894,15 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
if (rqstp->rq_res.page_len == 0) {
get_page(page);
- put_page(*pp);
- *pp = page;
- rqstp->rq_resused++;
+ put_page(*rqstp->rq_next_page);
+ *(rqstp->rq_next_page++) = page;
rqstp->rq_res.page_base = buf->offset;
rqstp->rq_res.page_len = size;
} else if (page != pp[-1]) {
get_page(page);
- if (*pp)
- put_page(*pp);
- *pp = page;
- rqstp->rq_resused++;
+ if (*rqstp->rq_next_page)
+ put_page(*rqstp->rq_next_page);
+ *(rqstp->rq_next_page++) = page;
rqstp->rq_res.page_len += size;
} else
rqstp->rq_res.page_len += size;
@@ -936,7 +934,7 @@ nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
.u.data = rqstp,
};
- rqstp->rq_resused = 1;
+ rqstp->rq_next_page = rqstp->rq_respages + 1;
host_err = splice_direct_to_actor(file, &sd, nfsd_direct_splice_actor);
} else {
oldfs = get_fs();
@@ -1020,28 +1018,10 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
inode = dentry->d_inode;
exp = fhp->fh_export;
- /*
- * Request sync writes if
- * - the sync export option has been set, or
- * - the client requested O_SYNC behavior (NFSv3 feature).
- * - The file system doesn't support fsync().
- * When NFSv2 gathered writes have been configured for this volume,
- * flushing the data to disk is handled separately below.
- */
use_wgather = (rqstp->rq_vers == 2) && EX_WGATHER(exp);
- if (!file->f_op->fsync) {/* COMMIT3 cannot work */
- stable = 2;
- *stablep = 2; /* FILE_SYNC */
- }
-
if (!EX_ISSYNC(exp))
stable = 0;
- if (stable && !use_wgather) {
- spin_lock(&file->f_lock);
- file->f_flags |= O_SYNC;
- spin_unlock(&file->f_lock);
- }
/* Write the data. */
oldfs = get_fs(); set_fs(KERNEL_DS);
@@ -1057,8 +1037,12 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
if (inode->i_mode & (S_ISUID | S_ISGID))
kill_suid(dentry);
- if (stable && use_wgather)
- host_err = wait_for_concurrent_writes(file);
+ if (stable) {
+ if (use_wgather)
+ host_err = wait_for_concurrent_writes(file);
+ else
+ host_err = vfs_fsync_range(file, offset, offset+*cnt, 0);
+ }
out_nfserr:
dprintk("nfsd: write complete host_err=%d\n", host_err);
@@ -1485,13 +1469,19 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
case NFS3_CREATE_EXCLUSIVE:
if ( dchild->d_inode->i_mtime.tv_sec == v_mtime
&& dchild->d_inode->i_atime.tv_sec == v_atime
- && dchild->d_inode->i_size == 0 )
+ && dchild->d_inode->i_size == 0 ) {
+ if (created)
+ *created = 1;
break;
+ }
case NFS4_CREATE_EXCLUSIVE4_1:
if ( dchild->d_inode->i_mtime.tv_sec == v_mtime
&& dchild->d_inode->i_atime.tv_sec == v_atime
- && dchild->d_inode->i_size == 0 )
+ && dchild->d_inode->i_size == 0 ) {
+ if (created)
+ *created = 1;
goto set_attr;
+ }
/* fallthru */
case NFS3_CREATE_GUARDED:
err = nfserr_exist;
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index acd127d4ee82..0889bfb43dc9 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -385,7 +385,8 @@ struct nfsd4_write {
u64 wr_offset; /* request */
u32 wr_stable_how; /* request */
u32 wr_buflen; /* request */
- int wr_vlen;
+ struct kvec wr_head;
+ struct page ** wr_pagelist; /* request */
u32 wr_bytes_written; /* response */
u32 wr_how_written; /* response */
@@ -462,6 +463,7 @@ struct nfsd4_op {
/* NFSv4.1 */
struct nfsd4_exchange_id exchange_id;
+ struct nfsd4_backchannel_ctl backchannel_ctl;
struct nfsd4_bind_conn_to_session bind_conn_to_session;
struct nfsd4_create_session create_session;
struct nfsd4_destroy_session destroy_session;
@@ -526,6 +528,14 @@ static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
|| nfsd4_is_solo_sequence(resp);
}
+static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
+{
+ struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ struct nfsd4_compoundargs *argp = rqstp->rq_argp;
+
+ return argp->opcnt == resp->opcnt;
+}
+
#define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs)
static inline void
@@ -566,6 +576,7 @@ extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
struct nfsd4_sequence *seq);
extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
struct nfsd4_compound_state *, struct nfsd4_exchange_id *);
+extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_backchannel_ctl *);
extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_bind_conn_to_session *);
extern __be32 nfsd4_create_session(struct svc_rqst *,
struct nfsd4_compound_state *,
@@ -579,7 +590,7 @@ extern __be32 nfsd4_destroy_session(struct svc_rqst *,
extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_destroy_clientid *);
__be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_reclaim_complete *);
extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
- struct nfsd4_open *open);
+ struct nfsd4_open *open, struct nfsd_net *nn);
extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
struct svc_fh *current_fh, struct nfsd4_open *open);
extern void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status);
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 16f35f7423c5..61946883025c 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -167,7 +167,6 @@ const struct file_operations nilfs_file_operations = {
};
const struct inode_operations nilfs_file_inode_operations = {
- .truncate = nilfs_truncate,
.setattr = nilfs_setattr,
.permission = nilfs_permission,
.fiemap = nilfs_fiemap,
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 4d31d2cca7fd..6b49f14eac8c 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -213,6 +213,16 @@ static int nilfs_set_page_dirty(struct page *page)
return ret;
}
+void nilfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ nilfs_truncate(inode);
+ }
+}
+
static int nilfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -227,10 +237,7 @@ static int nilfs_write_begin(struct file *file, struct address_space *mapping,
err = block_write_begin(mapping, pos, len, flags, pagep,
nilfs_get_block);
if (unlikely(err)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
-
+ nilfs_write_failed(mapping, pos + len);
nilfs_transaction_abort(inode->i_sb);
}
return err;
@@ -259,6 +266,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t offset, unsigned long nr_segs)
{
struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_mapping->host;
ssize_t size;
@@ -278,7 +286,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t end = offset + iov_length(iov, nr_segs);
if (end > isize)
- vmtruncate(inode, isize);
+ nilfs_write_failed(mapping, end);
}
return size;
@@ -786,10 +794,8 @@ int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
if ((iattr->ia_valid & ATTR_SIZE) &&
iattr->ia_size != i_size_read(inode)) {
inode_dio_wait(inode);
-
- err = vmtruncate(inode, iattr->ia_size);
- if (unlikely(err))
- goto out_err;
+ truncate_setsize(inode, iattr->ia_size);
+ nilfs_truncate(inode);
}
setattr_copy(inode, iattr);
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 74cece80e9a3..9bc72dec3fa6 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -277,6 +277,7 @@ extern void nilfs_update_inode(struct inode *, struct buffer_head *);
extern void nilfs_truncate(struct inode *);
extern void nilfs_evict_inode(struct inode *);
extern int nilfs_setattr(struct dentry *, struct iattr *);
+extern void nilfs_write_failed(struct address_space *mapping, loff_t to);
int nilfs_permission(struct inode *inode, int mask);
int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh);
extern int nilfs_inode_dirty(struct inode *);
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 3e7b2a0dc0c8..07f76db04ec7 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -431,7 +431,7 @@ void nilfs_mapping_init(struct address_space *mapping, struct inode *inode,
mapping->host = inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_NOFS);
- mapping->assoc_mapping = NULL;
+ mapping->private_data = NULL;
mapping->backing_dev_info = bdi;
mapping->a_ops = &empty_aops;
}
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index f1626f5011c5..ff00a0b7acb9 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -527,7 +527,8 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
if (unlikely(err)) {
loff_t isize = inode->i_size;
if (pos + blocksize > isize)
- vmtruncate(inode, isize);
+ nilfs_write_failed(inode->i_mapping,
+ pos + blocksize);
goto failed_inode;
}
diff --git a/fs/notify/Makefile b/fs/notify/Makefile
index ae5f33a6d868..96d3420d0242 100644
--- a/fs/notify/Makefile
+++ b/fs/notify/Makefile
@@ -1,5 +1,5 @@
obj-$(CONFIG_FSNOTIFY) += fsnotify.o notification.o group.o inode_mark.o \
- mark.o vfsmount_mark.o
+ mark.o vfsmount_mark.o fdinfo.o
obj-y += dnotify/
obj-y += inotify/
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index 3344bdd5506e..08b886f119ce 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -201,7 +201,7 @@ void dnotify_flush(struct file *filp, fl_owner_t id)
/* nothing else could have found us thanks to the dnotify_mark_mutex */
if (dn_mark->dn == NULL)
- fsnotify_destroy_mark(fsn_mark);
+ fsnotify_destroy_mark(fsn_mark, dnotify_group);
mutex_unlock(&dnotify_mark_mutex);
@@ -385,7 +385,7 @@ out:
spin_unlock(&fsn_mark->lock);
if (destroy)
- fsnotify_destroy_mark(fsn_mark);
+ fsnotify_destroy_mark(fsn_mark, dnotify_group);
mutex_unlock(&dnotify_mark_mutex);
fsnotify_put_mark(fsn_mark);
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index f35794b97e8e..0c2f9122b262 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -18,9 +18,16 @@ static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new)
old->tgid == new->tgid) {
switch (old->data_type) {
case (FSNOTIFY_EVENT_PATH):
+#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
+ /* dont merge two permission events */
+ if ((old->mask & FAN_ALL_PERM_EVENTS) &&
+ (new->mask & FAN_ALL_PERM_EVENTS))
+ return false;
+#endif
if ((old->path.mnt == new->path.mnt) &&
(old->path.dentry == new->path.dentry))
return true;
+ break;
case (FSNOTIFY_EVENT_NONE):
return true;
default:
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 721d692fa8d4..9ff4a5ee6e20 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -17,6 +17,7 @@
#include <asm/ioctls.h>
#include "../../mount.h"
+#include "../fdinfo.h"
#define FANOTIFY_DEFAULT_MAX_EVENTS 16384
#define FANOTIFY_DEFAULT_MAX_MARKS 8192
@@ -258,7 +259,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
if (ret)
goto out_close_fd;
- fd_install(fd, f);
+ if (fd != FAN_NOFD)
+ fd_install(fd, f);
return fanotify_event_metadata.event_len;
out_close_fd:
@@ -395,8 +397,12 @@ static int fanotify_release(struct inode *ignored, struct file *file)
wake_up(&group->fanotify_data.access_waitq);
#endif
+
+ if (file->f_flags & FASYNC)
+ fsnotify_fasync(-1, file, 0);
+
/* matches the fanotify_init->fsnotify_alloc_group */
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return 0;
}
@@ -427,6 +433,7 @@ static long fanotify_ioctl(struct file *file, unsigned int cmd, unsigned long ar
}
static const struct file_operations fanotify_fops = {
+ .show_fdinfo = fanotify_show_fdinfo,
.poll = fanotify_poll,
.read = fanotify_read,
.write = fanotify_write,
@@ -490,7 +497,8 @@ out:
static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
__u32 mask,
- unsigned int flags)
+ unsigned int flags,
+ int *destroy)
{
__u32 oldmask;
@@ -504,8 +512,7 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
}
spin_unlock(&fsn_mark->lock);
- if (!(oldmask & ~mask))
- fsnotify_destroy_mark(fsn_mark);
+ *destroy = !(oldmask & ~mask);
return mask & oldmask;
}
@@ -516,12 +523,17 @@ static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group,
{
struct fsnotify_mark *fsn_mark = NULL;
__u32 removed;
+ int destroy_mark;
fsn_mark = fsnotify_find_vfsmount_mark(group, mnt);
if (!fsn_mark)
return -ENOENT;
- removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);
+ removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags,
+ &destroy_mark);
+ if (destroy_mark)
+ fsnotify_destroy_mark(fsn_mark, group);
+
fsnotify_put_mark(fsn_mark);
if (removed & real_mount(mnt)->mnt_fsnotify_mask)
fsnotify_recalc_vfsmount_mask(mnt);
@@ -535,12 +547,16 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group,
{
struct fsnotify_mark *fsn_mark = NULL;
__u32 removed;
+ int destroy_mark;
fsn_mark = fsnotify_find_inode_mark(group, inode);
if (!fsn_mark)
return -ENOENT;
- removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);
+ removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags,
+ &destroy_mark);
+ if (destroy_mark)
+ fsnotify_destroy_mark(fsn_mark, group);
/* matches the fsnotify_find_inode_mark() */
fsnotify_put_mark(fsn_mark);
if (removed & inode->i_fsnotify_mask)
@@ -707,13 +723,13 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
break;
default:
fd = -EINVAL;
- goto out_put_group;
+ goto out_destroy_group;
}
if (flags & FAN_UNLIMITED_QUEUE) {
fd = -EPERM;
if (!capable(CAP_SYS_ADMIN))
- goto out_put_group;
+ goto out_destroy_group;
group->max_events = UINT_MAX;
} else {
group->max_events = FANOTIFY_DEFAULT_MAX_EVENTS;
@@ -722,7 +738,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
if (flags & FAN_UNLIMITED_MARKS) {
fd = -EPERM;
if (!capable(CAP_SYS_ADMIN))
- goto out_put_group;
+ goto out_destroy_group;
group->fanotify_data.max_marks = UINT_MAX;
} else {
group->fanotify_data.max_marks = FANOTIFY_DEFAULT_MAX_MARKS;
@@ -730,12 +746,12 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
fd = anon_inode_getfd("[fanotify]", &fanotify_fops, group, f_flags);
if (fd < 0)
- goto out_put_group;
+ goto out_destroy_group;
return fd;
-out_put_group:
- fsnotify_put_group(group);
+out_destroy_group:
+ fsnotify_destroy_group(group);
return fd;
}
diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c
new file mode 100644
index 000000000000..238a5930cb3c
--- /dev/null
+++ b/fs/notify/fdinfo.c
@@ -0,0 +1,179 @@
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/fsnotify_backend.h>
+#include <linux/idr.h>
+#include <linux/init.h>
+#include <linux/inotify.h>
+#include <linux/fanotify.h>
+#include <linux/kernel.h>
+#include <linux/namei.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+#include <linux/exportfs.h>
+
+#include "inotify/inotify.h"
+#include "../fs/mount.h"
+
+#if defined(CONFIG_PROC_FS)
+
+#if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY)
+
+static int show_fdinfo(struct seq_file *m, struct file *f,
+ int (*show)(struct seq_file *m, struct fsnotify_mark *mark))
+{
+ struct fsnotify_group *group = f->private_data;
+ struct fsnotify_mark *mark;
+ int ret = 0;
+
+ mutex_lock(&group->mark_mutex);
+ list_for_each_entry(mark, &group->marks_list, g_list) {
+ ret = show(m, mark);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&group->mark_mutex);
+ return ret;
+}
+
+#if defined(CONFIG_EXPORTFS)
+static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
+{
+ struct {
+ struct file_handle handle;
+ u8 pad[64];
+ } f;
+ int size, ret, i;
+
+ f.handle.handle_bytes = sizeof(f.pad);
+ size = f.handle.handle_bytes >> 2;
+
+ ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0);
+ if ((ret == 255) || (ret == -ENOSPC)) {
+ WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
+ return 0;
+ }
+
+ f.handle.handle_type = ret;
+ f.handle.handle_bytes = size * sizeof(u32);
+
+ ret = seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
+ f.handle.handle_bytes, f.handle.handle_type);
+
+ for (i = 0; i < f.handle.handle_bytes; i++)
+ ret |= seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
+
+ return ret;
+}
+#else
+static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
+{
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_INOTIFY_USER
+
+static int inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
+{
+ struct inotify_inode_mark *inode_mark;
+ struct inode *inode;
+ int ret = 0;
+
+ if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE)))
+ return 0;
+
+ inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
+ inode = igrab(mark->i.inode);
+ if (inode) {
+ ret = seq_printf(m, "inotify wd:%x ino:%lx sdev:%x "
+ "mask:%x ignored_mask:%x ",
+ inode_mark->wd, inode->i_ino,
+ inode->i_sb->s_dev,
+ mark->mask, mark->ignored_mask);
+ ret |= show_mark_fhandle(m, inode);
+ ret |= seq_putc(m, '\n');
+ iput(inode);
+ }
+
+ return ret;
+}
+
+int inotify_show_fdinfo(struct seq_file *m, struct file *f)
+{
+ return show_fdinfo(m, f, inotify_fdinfo);
+}
+
+#endif /* CONFIG_INOTIFY_USER */
+
+#ifdef CONFIG_FANOTIFY
+
+static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
+{
+ unsigned int mflags = 0;
+ struct inode *inode;
+ int ret = 0;
+
+ if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE))
+ return 0;
+
+ if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
+ mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
+
+ if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
+ inode = igrab(mark->i.inode);
+ if (!inode)
+ goto out;
+ ret = seq_printf(m, "fanotify ino:%lx sdev:%x "
+ "mflags:%x mask:%x ignored_mask:%x ",
+ inode->i_ino, inode->i_sb->s_dev,
+ mflags, mark->mask, mark->ignored_mask);
+ ret |= show_mark_fhandle(m, inode);
+ ret |= seq_putc(m, '\n');
+ iput(inode);
+ } else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) {
+ struct mount *mnt = real_mount(mark->m.mnt);
+
+ ret = seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x "
+ "ignored_mask:%x\n", mnt->mnt_id, mflags,
+ mark->mask, mark->ignored_mask);
+ }
+out:
+ return ret;
+}
+
+int fanotify_show_fdinfo(struct seq_file *m, struct file *f)
+{
+ struct fsnotify_group *group = f->private_data;
+ unsigned int flags = 0;
+
+ switch (group->priority) {
+ case FS_PRIO_0:
+ flags |= FAN_CLASS_NOTIF;
+ break;
+ case FS_PRIO_1:
+ flags |= FAN_CLASS_CONTENT;
+ break;
+ case FS_PRIO_2:
+ flags |= FAN_CLASS_PRE_CONTENT;
+ break;
+ }
+
+ if (group->max_events == UINT_MAX)
+ flags |= FAN_UNLIMITED_QUEUE;
+
+ if (group->fanotify_data.max_marks == UINT_MAX)
+ flags |= FAN_UNLIMITED_MARKS;
+
+ seq_printf(m, "fanotify flags:%x event-flags:%x\n",
+ flags, group->fanotify_data.f_flags);
+
+ return show_fdinfo(m, f, fanotify_fdinfo);
+}
+
+#endif /* CONFIG_FANOTIFY */
+
+#endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */
+
+#endif /* CONFIG_PROC_FS */
diff --git a/fs/notify/fdinfo.h b/fs/notify/fdinfo.h
new file mode 100644
index 000000000000..556afda990e9
--- /dev/null
+++ b/fs/notify/fdinfo.h
@@ -0,0 +1,27 @@
+#ifndef __FSNOTIFY_FDINFO_H__
+#define __FSNOTIFY_FDINFO_H__
+
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+
+struct seq_file;
+struct file;
+
+#ifdef CONFIG_PROC_FS
+
+#ifdef CONFIG_INOTIFY_USER
+extern int inotify_show_fdinfo(struct seq_file *m, struct file *f);
+#endif
+
+#ifdef CONFIG_FANOTIFY
+extern int fanotify_show_fdinfo(struct seq_file *m, struct file *f);
+#endif
+
+#else /* CONFIG_PROC_FS */
+
+#define inotify_show_fdinfo NULL
+#define fanotify_show_fdinfo NULL
+
+#endif /* CONFIG_PROC_FS */
+
+#endif /* __FSNOTIFY_FDINFO_H__ */
diff --git a/fs/notify/group.c b/fs/notify/group.c
index 63fc294a4692..bd2625bd88b4 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -33,9 +33,6 @@
*/
void fsnotify_final_destroy_group(struct fsnotify_group *group)
{
- /* clear the notification queue of all events */
- fsnotify_flush_notify(group);
-
if (group->ops->free_group_priv)
group->ops->free_group_priv(group);
@@ -43,23 +40,30 @@ void fsnotify_final_destroy_group(struct fsnotify_group *group)
}
/*
- * Trying to get rid of a group. We need to first get rid of any outstanding
- * allocations and then free the group. Remember that fsnotify_clear_marks_by_group
- * could miss marks that are being freed by inode and those marks could still
- * hold a reference to this group (via group->num_marks) If we get into that
- * situtation, the fsnotify_final_destroy_group will get called when that final
- * mark is freed.
+ * Trying to get rid of a group. Remove all marks, flush all events and release
+ * the group reference.
+ * Note that another thread calling fsnotify_clear_marks_by_group() may still
+ * hold a ref to the group.
*/
-static void fsnotify_destroy_group(struct fsnotify_group *group)
+void fsnotify_destroy_group(struct fsnotify_group *group)
{
/* clear all inode marks for this group */
fsnotify_clear_marks_by_group(group);
synchronize_srcu(&fsnotify_mark_srcu);
- /* past the point of no return, matches the initial value of 1 */
- if (atomic_dec_and_test(&group->num_marks))
- fsnotify_final_destroy_group(group);
+ /* clear the notification queue of all events */
+ fsnotify_flush_notify(group);
+
+ fsnotify_put_group(group);
+}
+
+/*
+ * Get reference to a group.
+ */
+void fsnotify_get_group(struct fsnotify_group *group)
+{
+ atomic_inc(&group->refcnt);
}
/*
@@ -68,7 +72,7 @@ static void fsnotify_destroy_group(struct fsnotify_group *group)
void fsnotify_put_group(struct fsnotify_group *group)
{
if (atomic_dec_and_test(&group->refcnt))
- fsnotify_destroy_group(group);
+ fsnotify_final_destroy_group(group);
}
/*
@@ -84,21 +88,24 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
/* set to 0 when there a no external references to this group */
atomic_set(&group->refcnt, 1);
- /*
- * hits 0 when there are no external references AND no marks for
- * this group
- */
- atomic_set(&group->num_marks, 1);
+ atomic_set(&group->num_marks, 0);
mutex_init(&group->notification_mutex);
INIT_LIST_HEAD(&group->notification_list);
init_waitqueue_head(&group->notification_waitq);
group->max_events = UINT_MAX;
- spin_lock_init(&group->mark_lock);
+ mutex_init(&group->mark_mutex);
INIT_LIST_HEAD(&group->marks_list);
group->ops = ops;
return group;
}
+
+int fsnotify_fasync(int fd, struct file *file, int on)
+{
+ struct fsnotify_group *group = file->private_data;
+
+ return fasync_helper(fd, file, on, &group->fsn_fa) >= 0 ? 0 : -EIO;
+}
diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c
index b13c00ac48eb..f31e90fc050d 100644
--- a/fs/notify/inode_mark.c
+++ b/fs/notify/inode_mark.c
@@ -63,8 +63,8 @@ void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark)
{
struct inode *inode = mark->i.inode;
+ BUG_ON(!mutex_is_locked(&mark->group->mark_mutex));
assert_spin_locked(&mark->lock);
- assert_spin_locked(&mark->group->mark_lock);
spin_lock(&inode->i_lock);
@@ -99,8 +99,16 @@ void fsnotify_clear_marks_by_inode(struct inode *inode)
spin_unlock(&inode->i_lock);
list_for_each_entry_safe(mark, lmark, &free_list, i.free_i_list) {
- fsnotify_destroy_mark(mark);
+ struct fsnotify_group *group;
+
+ spin_lock(&mark->lock);
+ fsnotify_get_group(mark->group);
+ group = mark->group;
+ spin_unlock(&mark->lock);
+
+ fsnotify_destroy_mark(mark, group);
fsnotify_put_mark(mark);
+ fsnotify_put_group(group);
}
}
@@ -116,8 +124,9 @@ void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group)
* given a group and inode, find the mark associated with that combination.
* if found take a reference to that mark and return it, else return NULL
*/
-struct fsnotify_mark *fsnotify_find_inode_mark_locked(struct fsnotify_group *group,
- struct inode *inode)
+static struct fsnotify_mark *fsnotify_find_inode_mark_locked(
+ struct fsnotify_group *group,
+ struct inode *inode)
{
struct fsnotify_mark *mark;
struct hlist_node *pos;
@@ -191,8 +200,8 @@ int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
mark->flags |= FSNOTIFY_MARK_FLAG_INODE;
+ BUG_ON(!mutex_is_locked(&group->mark_mutex));
assert_spin_locked(&mark->lock);
- assert_spin_locked(&group->mark_lock);
spin_lock(&inode->i_lock);
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index e3cbd746f64a..871569c7d609 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -118,6 +118,7 @@ static int inotify_handle_event(struct fsnotify_group *group,
fsn_event_priv = &event_priv->fsnotify_event_priv_data;
+ fsnotify_get_group(group);
fsn_event_priv->group = group;
event_priv->wd = wd;
@@ -131,7 +132,7 @@ static int inotify_handle_event(struct fsnotify_group *group,
}
if (inode_mark->mask & IN_ONESHOT)
- fsnotify_destroy_mark(inode_mark);
+ fsnotify_destroy_mark(inode_mark, group);
return ret;
}
@@ -210,6 +211,7 @@ void inotify_free_event_priv(struct fsnotify_event_private_data *fsn_event_priv)
event_priv = container_of(fsn_event_priv, struct inotify_event_private_data,
fsnotify_event_priv_data);
+ fsnotify_put_group(fsn_event_priv->group);
kmem_cache_free(event_priv_cachep, event_priv);
}
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index c311dda054a3..228a2c2ad8d7 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -40,6 +40,7 @@
#include <linux/wait.h>
#include "inotify.h"
+#include "../fdinfo.h"
#include <asm/ioctls.h>
@@ -264,7 +265,7 @@ static ssize_t inotify_read(struct file *file, char __user *buf,
ret = -EAGAIN;
if (file->f_flags & O_NONBLOCK)
break;
- ret = -EINTR;
+ ret = -ERESTARTSYS;
if (signal_pending(current))
break;
@@ -280,23 +281,17 @@ static ssize_t inotify_read(struct file *file, char __user *buf,
return ret;
}
-static int inotify_fasync(int fd, struct file *file, int on)
-{
- struct fsnotify_group *group = file->private_data;
-
- return fasync_helper(fd, file, on, &group->inotify_data.fa) >= 0 ? 0 : -EIO;
-}
-
static int inotify_release(struct inode *ignored, struct file *file)
{
struct fsnotify_group *group = file->private_data;
pr_debug("%s: group=%p\n", __func__, group);
- fsnotify_clear_marks_by_group(group);
+ if (file->f_flags & FASYNC)
+ fsnotify_fasync(-1, file, 0);
/* free this group, matching get was inotify_init->fsnotify_obtain_group */
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return 0;
}
@@ -335,9 +330,10 @@ static long inotify_ioctl(struct file *file, unsigned int cmd,
}
static const struct file_operations inotify_fops = {
+ .show_fdinfo = inotify_show_fdinfo,
.poll = inotify_poll,
.read = inotify_read,
- .fasync = inotify_fasync,
+ .fasync = fsnotify_fasync,
.release = inotify_release,
.unlocked_ioctl = inotify_ioctl,
.compat_ioctl = inotify_ioctl,
@@ -519,13 +515,13 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
struct fsnotify_event_private_data *fsn_event_priv;
int ret;
+ i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
+
ignored_event = fsnotify_create_event(NULL, FS_IN_IGNORED, NULL,
FSNOTIFY_EVENT_NONE, NULL, 0,
GFP_NOFS);
if (!ignored_event)
- return;
-
- i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
+ goto skip_send_ignore;
event_priv = kmem_cache_alloc(event_priv_cachep, GFP_NOFS);
if (unlikely(!event_priv))
@@ -533,6 +529,7 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
fsn_event_priv = &event_priv->fsnotify_event_priv_data;
+ fsnotify_get_group(group);
fsn_event_priv->group = group;
event_priv->wd = i_mark->wd;
@@ -546,9 +543,9 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
}
skip_send_ignore:
-
/* matches the reference taken when the event was created */
- fsnotify_put_event(ignored_event);
+ if (ignored_event)
+ fsnotify_put_event(ignored_event);
/* remove this mark from the idr */
inotify_remove_from_idr(group, i_mark);
@@ -707,12 +704,11 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events)
spin_lock_init(&group->inotify_data.idr_lock);
idr_init(&group->inotify_data.idr);
group->inotify_data.last_wd = 0;
- group->inotify_data.fa = NULL;
group->inotify_data.user = get_current_user();
if (atomic_inc_return(&group->inotify_data.user->inotify_devs) >
inotify_max_user_instances) {
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return ERR_PTR(-EMFILE);
}
@@ -741,7 +737,7 @@ SYSCALL_DEFINE1(inotify_init1, int, flags)
ret = anon_inode_getfd("inotify", &inotify_fops, group,
O_RDONLY | flags);
if (ret < 0)
- fsnotify_put_group(group);
+ fsnotify_destroy_group(group);
return ret;
}
@@ -817,7 +813,7 @@ SYSCALL_DEFINE2(inotify_rm_watch, int, fd, __s32, wd)
ret = 0;
- fsnotify_destroy_mark(&i_mark->fsn_mark);
+ fsnotify_destroy_mark(&i_mark->fsn_mark, group);
/* match ref taken by inotify_idr_find */
fsnotify_put_mark(&i_mark->fsn_mark);
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index f104d565b682..fc6b49bf7360 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -109,8 +109,11 @@ void fsnotify_get_mark(struct fsnotify_mark *mark)
void fsnotify_put_mark(struct fsnotify_mark *mark)
{
- if (atomic_dec_and_test(&mark->refcnt))
+ if (atomic_dec_and_test(&mark->refcnt)) {
+ if (mark->group)
+ fsnotify_put_group(mark->group);
mark->free_mark(mark);
+ }
}
/*
@@ -118,14 +121,14 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
* The caller had better be holding a reference to this mark so we don't actually
* do the final put under the mark->lock
*/
-void fsnotify_destroy_mark(struct fsnotify_mark *mark)
+void fsnotify_destroy_mark_locked(struct fsnotify_mark *mark,
+ struct fsnotify_group *group)
{
- struct fsnotify_group *group;
struct inode *inode = NULL;
- spin_lock(&mark->lock);
+ BUG_ON(!mutex_is_locked(&group->mark_mutex));
- group = mark->group;
+ spin_lock(&mark->lock);
/* something else already called this function on this mark */
if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE)) {
@@ -135,8 +138,6 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark)
mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE;
- spin_lock(&group->mark_lock);
-
if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
inode = mark->i.inode;
fsnotify_destroy_inode_mark(mark);
@@ -147,13 +148,22 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark)
list_del_init(&mark->g_list);
- spin_unlock(&group->mark_lock);
spin_unlock(&mark->lock);
+ if (inode && (mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED))
+ iput(inode);
+ /* release lock temporarily */
+ mutex_unlock(&group->mark_mutex);
+
spin_lock(&destroy_lock);
list_add(&mark->destroy_list, &destroy_list);
spin_unlock(&destroy_lock);
wake_up(&destroy_waitq);
+ /*
+ * We don't necessarily have a ref on mark from caller so the above destroy
+ * may have actually freed it, unless this group provides a 'freeing_mark'
+ * function which must be holding a reference.
+ */
/*
* Some groups like to know that marks are being freed. This is a
@@ -175,21 +185,17 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark)
* is just a lazy update (and could be a perf win...)
*/
- if (inode && (mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED))
- iput(inode);
+ atomic_dec(&group->num_marks);
- /*
- * We don't necessarily have a ref on mark from caller so the above iput
- * may have already destroyed it. Don't touch from now on.
- */
+ mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING);
+}
- /*
- * it's possible that this group tried to destroy itself, but this
- * this mark was simultaneously being freed by inode. If that's the
- * case, we finish freeing the group here.
- */
- if (unlikely(atomic_dec_and_test(&group->num_marks)))
- fsnotify_final_destroy_group(group);
+void fsnotify_destroy_mark(struct fsnotify_mark *mark,
+ struct fsnotify_group *group)
+{
+ mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING);
+ fsnotify_destroy_mark_locked(mark, group);
+ mutex_unlock(&group->mark_mutex);
}
void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask)
@@ -214,26 +220,26 @@ void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mas
* These marks may be used for the fsnotify backend to determine which
* event types should be delivered to which group.
*/
-int fsnotify_add_mark(struct fsnotify_mark *mark,
- struct fsnotify_group *group, struct inode *inode,
- struct vfsmount *mnt, int allow_dups)
+int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
+ struct fsnotify_group *group, struct inode *inode,
+ struct vfsmount *mnt, int allow_dups)
{
int ret = 0;
BUG_ON(inode && mnt);
BUG_ON(!inode && !mnt);
+ BUG_ON(!mutex_is_locked(&group->mark_mutex));
/*
* LOCKING ORDER!!!!
+ * group->mark_mutex
* mark->lock
- * group->mark_lock
* inode->i_lock
*/
spin_lock(&mark->lock);
- spin_lock(&group->mark_lock);
-
mark->flags |= FSNOTIFY_MARK_FLAG_ALIVE;
+ fsnotify_get_group(group);
mark->group = group;
list_add(&mark->g_list, &group->marks_list);
atomic_inc(&group->num_marks);
@@ -251,11 +257,8 @@ int fsnotify_add_mark(struct fsnotify_mark *mark,
BUG();
}
- spin_unlock(&group->mark_lock);
-
/* this will pin the object if appropriate */
fsnotify_set_mark_mask_locked(mark, mark->mask);
-
spin_unlock(&mark->lock);
if (inode)
@@ -265,10 +268,10 @@ int fsnotify_add_mark(struct fsnotify_mark *mark,
err:
mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE;
list_del_init(&mark->g_list);
+ fsnotify_put_group(group);
mark->group = NULL;
atomic_dec(&group->num_marks);
- spin_unlock(&group->mark_lock);
spin_unlock(&mark->lock);
spin_lock(&destroy_lock);
@@ -279,6 +282,16 @@ err:
return ret;
}
+int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
+ struct inode *inode, struct vfsmount *mnt, int allow_dups)
+{
+ int ret;
+ mutex_lock(&group->mark_mutex);
+ ret = fsnotify_add_mark_locked(mark, group, inode, mnt, allow_dups);
+ mutex_unlock(&group->mark_mutex);
+ return ret;
+}
+
/*
* clear any marks in a group in which mark->flags & flags is true
*/
@@ -286,22 +299,16 @@ void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group,
unsigned int flags)
{
struct fsnotify_mark *lmark, *mark;
- LIST_HEAD(free_list);
- spin_lock(&group->mark_lock);
+ mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING);
list_for_each_entry_safe(mark, lmark, &group->marks_list, g_list) {
if (mark->flags & flags) {
- list_add(&mark->free_g_list, &free_list);
- list_del_init(&mark->g_list);
fsnotify_get_mark(mark);
+ fsnotify_destroy_mark_locked(mark, group);
+ fsnotify_put_mark(mark);
}
}
- spin_unlock(&group->mark_lock);
-
- list_for_each_entry_safe(mark, lmark, &free_list, free_g_list) {
- fsnotify_destroy_mark(mark);
- fsnotify_put_mark(mark);
- }
+ mutex_unlock(&group->mark_mutex);
}
/*
@@ -317,6 +324,8 @@ void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *ol
assert_spin_locked(&old->lock);
new->i.inode = old->i.inode;
new->m.mnt = old->m.mnt;
+ if (old->group)
+ fsnotify_get_group(old->group);
new->group = old->group;
new->mask = old->mask;
new->free_mark = old->free_mark;
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 48cb994e4922..7b51b05f160c 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -225,6 +225,7 @@ alloc_holder:
mutex_unlock(&group->notification_mutex);
wake_up(&group->notification_waitq);
+ kill_fasync(&group->fsn_fa, SIGIO, POLL_IN);
return return_event;
}
diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c
index b7b4b0e8554f..4df58b8ea64a 100644
--- a/fs/notify/vfsmount_mark.c
+++ b/fs/notify/vfsmount_mark.c
@@ -46,8 +46,16 @@ void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
spin_unlock(&mnt->mnt_root->d_lock);
list_for_each_entry_safe(mark, lmark, &free_list, m.free_m_list) {
- fsnotify_destroy_mark(mark);
+ struct fsnotify_group *group;
+
+ spin_lock(&mark->lock);
+ fsnotify_get_group(mark->group);
+ group = mark->group;
+ spin_unlock(&mark->lock);
+
+ fsnotify_destroy_mark(mark, group);
fsnotify_put_mark(mark);
+ fsnotify_put_group(group);
}
}
@@ -88,8 +96,8 @@ void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark)
{
struct vfsmount *mnt = mark->m.mnt;
+ BUG_ON(!mutex_is_locked(&mark->group->mark_mutex));
assert_spin_locked(&mark->lock);
- assert_spin_locked(&mark->group->mark_lock);
spin_lock(&mnt->mnt_root->d_lock);
@@ -151,8 +159,8 @@ int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
mark->flags |= FSNOTIFY_MARK_FLAG_VFSMOUNT;
+ BUG_ON(!mutex_is_locked(&group->mark_mutex));
assert_spin_locked(&mark->lock);
- assert_spin_locked(&group->mark_lock);
spin_lock(&mnt->mnt_root->d_lock);
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 1ecf46448f85..5b2d4f0853ac 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -1762,6 +1762,16 @@ err_out:
return err;
}
+static void ntfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ ntfs_truncate_vfs(inode);
+ }
+}
+
/**
* ntfs_file_buffered_write -
*
@@ -2022,8 +2032,9 @@ static ssize_t ntfs_file_buffered_write(struct kiocb *iocb,
* allocated space, which is not a disaster.
*/
i_size = i_size_read(vi);
- if (pos + bytes > i_size)
- vmtruncate(vi, i_size);
+ if (pos + bytes > i_size) {
+ ntfs_write_failed(mapping, pos + bytes);
+ }
break;
}
}
@@ -2227,7 +2238,6 @@ const struct file_operations ntfs_file_ops = {
const struct inode_operations ntfs_file_inode_ops = {
#ifdef NTFS_RW
- .truncate = ntfs_truncate_vfs,
.setattr = ntfs_setattr,
#endif /* NTFS_RW */
};
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 1d27331e6fc9..d3e118cc6ffa 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2866,9 +2866,11 @@ conv_err_out:
*
* See ntfs_truncate() description above for details.
*/
+#ifdef NTFS_RW
void ntfs_truncate_vfs(struct inode *vi) {
ntfs_truncate(vi);
}
+#endif
/**
* ntfs_setattr - called from notify_change() when an attribute is being changed
@@ -2914,8 +2916,10 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
NInoCompressed(ni) ?
"compressed" : "encrypted");
err = -EOPNOTSUPP;
- } else
- err = vmtruncate(vi, attr->ia_size);
+ } else {
+ truncate_setsize(vi, attr->ia_size);
+ ntfs_truncate_vfs(vi);
+ }
if (err || ia_valid == ATTR_SIZE)
goto out;
} else {
diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
index db29695f845c..76b6cfb579d7 100644
--- a/fs/ntfs/inode.h
+++ b/fs/ntfs/inode.h
@@ -316,6 +316,10 @@ static inline void ntfs_commit_inode(struct inode *vi)
return;
}
+#else
+
+static inline void ntfs_truncate_vfs(struct inode *vi) {}
+
#endif /* NTFS_RW */
#endif /* _LINUX_NTFS_INODE_H */
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 70b5863a2d64..f487aa343442 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -832,7 +832,7 @@ out:
return ret;
}
-int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin)
+int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int whence)
{
struct inode *inode = file->f_mapping->host;
int ret;
@@ -843,7 +843,7 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin)
struct buffer_head *di_bh = NULL;
struct ocfs2_extent_rec rec;
- BUG_ON(origin != SEEK_DATA && origin != SEEK_HOLE);
+ BUG_ON(whence != SEEK_DATA && whence != SEEK_HOLE);
ret = ocfs2_inode_lock(inode, &di_bh, 0);
if (ret) {
@@ -859,7 +859,7 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin)
}
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
- if (origin == SEEK_HOLE)
+ if (whence == SEEK_HOLE)
*offset = inode->i_size;
goto out_unlock;
}
@@ -888,8 +888,8 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin)
is_data = (rec.e_flags & OCFS2_EXT_UNWRITTEN) ? 0 : 1;
}
- if ((!is_data && origin == SEEK_HOLE) ||
- (is_data && origin == SEEK_DATA)) {
+ if ((!is_data && whence == SEEK_HOLE) ||
+ (is_data && whence == SEEK_DATA)) {
if (extoff > *offset)
*offset = extoff;
goto out_unlock;
@@ -899,7 +899,7 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin)
cpos += clen;
}
- if (origin == SEEK_HOLE) {
+ if (whence == SEEK_HOLE) {
extoff = cpos;
extoff <<= cs_bits;
extlen = clen;
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 5a4ee77cec51..37d313ede159 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1218,24 +1218,6 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
}
}
- /*
- * This will intentionally not wind up calling truncate_setsize(),
- * since all the work for a size change has been done above.
- * Otherwise, we could get into problems with truncate as
- * ip_alloc_sem is used there to protect against i_size
- * changes.
- *
- * XXX: this means the conditional below can probably be removed.
- */
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- status = vmtruncate(inode, attr->ia_size);
- if (status) {
- mlog_errno(status);
- goto bail_commit;
- }
- }
-
setattr_copy(inode, attr);
mark_inode_dirty(inode);
@@ -2513,18 +2495,15 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
ret = sd.num_spliced;
if (ret > 0) {
- unsigned long nr_pages;
int err;
- nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
err = generic_write_sync(out, *ppos, ret);
if (err)
ret = err;
else
*ppos += ret;
- balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
+ balance_dirty_pages_ratelimited(mapping);
}
return ret;
@@ -2640,14 +2619,14 @@ bail:
}
/* Refer generic_file_llseek_unlocked() */
-static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int origin)
+static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
int ret = 0;
mutex_lock(&inode->i_mutex);
- switch (origin) {
+ switch (whence) {
case SEEK_SET:
break;
case SEEK_END:
@@ -2662,7 +2641,7 @@ static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int origin)
break;
case SEEK_DATA:
case SEEK_HOLE:
- ret = ocfs2_seek_data_hole_offset(file, &offset, origin);
+ ret = ocfs2_seek_data_hole_offset(file, &offset, whence);
if (ret)
goto out;
break;
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index 77e3cb2962b4..e0d9b3e722bd 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -306,6 +306,16 @@ omfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
return mpage_writepages(mapping, wbc, omfs_get_block);
}
+static void omfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ omfs_truncate(inode);
+ }
+}
+
static int omfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -314,11 +324,8 @@ static int omfs_write_begin(struct file *file, struct address_space *mapping,
ret = block_write_begin(mapping, pos, len, flags, pagep,
omfs_get_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ omfs_write_failed(mapping, pos + len);
return ret;
}
@@ -350,9 +357,11 @@ static int omfs_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
+ error = inode_newsize_ok(inode, attr->ia_size);
if (error)
return error;
+ truncate_setsize(inode, attr->ia_size);
+ omfs_truncate(inode);
}
setattr_copy(inode, attr);
@@ -362,7 +371,6 @@ static int omfs_setattr(struct dentry *dentry, struct iattr *attr)
const struct inode_operations omfs_file_inops = {
.setattr = omfs_setattr,
- .truncate = omfs_truncate
};
const struct address_space_operations omfs_aops = {
diff --git a/fs/open.c b/fs/open.c
index 59071f55bf7f..9b33c0cbfacf 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -61,33 +61,22 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
return ret;
}
-static long do_sys_truncate(const char __user *pathname, loff_t length)
+long vfs_truncate(struct path *path, loff_t length)
{
- struct path path;
struct inode *inode;
- int error;
-
- error = -EINVAL;
- if (length < 0) /* sorry, but loff_t says... */
- goto out;
+ long error;
- error = user_path(pathname, &path);
- if (error)
- goto out;
- inode = path.dentry->d_inode;
+ inode = path->dentry->d_inode;
/* For directories it's -EISDIR, for other non-regulars - -EINVAL */
- error = -EISDIR;
if (S_ISDIR(inode->i_mode))
- goto dput_and_out;
-
- error = -EINVAL;
+ return -EISDIR;
if (!S_ISREG(inode->i_mode))
- goto dput_and_out;
+ return -EINVAL;
- error = mnt_want_write(path.mnt);
+ error = mnt_want_write(path->mnt);
if (error)
- goto dput_and_out;
+ goto out;
error = inode_permission(inode, MAY_WRITE);
if (error)
@@ -111,19 +100,40 @@ static long do_sys_truncate(const char __user *pathname, loff_t length)
error = locks_verify_truncate(inode, NULL, length);
if (!error)
- error = security_path_truncate(&path);
+ error = security_path_truncate(path);
if (!error)
- error = do_truncate(path.dentry, length, 0, NULL);
+ error = do_truncate(path->dentry, length, 0, NULL);
put_write_and_out:
put_write_access(inode);
mnt_drop_write_and_out:
- mnt_drop_write(path.mnt);
-dput_and_out:
- path_put(&path);
+ mnt_drop_write(path->mnt);
out:
return error;
}
+EXPORT_SYMBOL_GPL(vfs_truncate);
+
+static long do_sys_truncate(const char __user *pathname, loff_t length)
+{
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
+ struct path path;
+ int error;
+
+ if (length < 0) /* sorry, but loff_t says... */
+ return -EINVAL;
+
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
+ if (!error) {
+ error = vfs_truncate(&path, length);
+ path_put(&path);
+ }
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
+ return error;
+}
SYSCALL_DEFINE2(truncate, const char __user *, path, long, length)
{
@@ -306,6 +316,7 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
struct path path;
struct inode *inode;
int res;
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
return -EINVAL;
@@ -328,8 +339,8 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
}
old_cred = override_creds(override_cred);
-
- res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
+retry:
+ res = user_path_at(dfd, filename, lookup_flags, &path);
if (res)
goto out;
@@ -364,6 +375,10 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
out_path_release:
path_put(&path);
+ if (retry_estale(res, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
revert_creds(old_cred);
put_cred(override_cred);
@@ -379,8 +394,9 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename)
{
struct path path;
int error;
-
- error = user_path_dir(filename, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
+retry:
+ error = user_path_at(AT_FDCWD, filename, lookup_flags, &path);
if (error)
goto out;
@@ -392,6 +408,10 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename)
dput_and_out:
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}
@@ -425,8 +445,9 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename)
{
struct path path;
int error;
-
- error = user_path_dir(filename, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
+retry:
+ error = user_path_at(AT_FDCWD, filename, lookup_flags, &path);
if (error)
goto out;
@@ -435,7 +456,7 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename)
goto dput_and_out;
error = -EPERM;
- if (!capable(CAP_SYS_CHROOT))
+ if (!nsown_capable(CAP_SYS_CHROOT))
goto dput_and_out;
error = security_path_chroot(&path);
if (error)
@@ -445,6 +466,10 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename)
error = 0;
dput_and_out:
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}
@@ -489,11 +514,16 @@ SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode
{
struct path path;
int error;
-
- error = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+ error = user_path_at(dfd, filename, lookup_flags, &path);
if (!error) {
error = chmod_common(&path, mode);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
}
return error;
}
@@ -552,6 +582,7 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
lookup_flags = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
if (flag & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
+retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
@@ -562,6 +593,10 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
mnt_drop_write(path.mnt);
out_release:
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}
diff --git a/fs/pnode.h b/fs/pnode.h
index 65c60979d541..19b853a3445c 100644
--- a/fs/pnode.h
+++ b/fs/pnode.h
@@ -22,6 +22,7 @@
#define CL_COPY_ALL 0x04
#define CL_MAKE_SHARED 0x08
#define CL_PRIVATE 0x10
+#define CL_SHARED_TO_SLAVE 0x20
static inline void set_mnt_shared(struct mount *mnt)
{
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 99349efbbc2b..981b05601931 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -21,6 +21,7 @@ proc-y += uptime.o
proc-y += version.o
proc-y += softirqs.o
proc-y += namespaces.o
+proc-y += self.o
proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o
proc-$(CONFIG_NET) += proc_net.o
proc-$(CONFIG_PROC_KCORE) += kcore.o
diff --git a/fs/proc/array.c b/fs/proc/array.c
index c1c207c36cae..6a91e6ffbcbd 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -162,7 +162,7 @@ static inline const char *get_task_state(struct task_struct *tsk)
static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *p)
{
- struct user_namespace *user_ns = current_user_ns();
+ struct user_namespace *user_ns = seq_user_ns(m);
struct group_info *group_info;
int g;
struct fdtable *fdt = NULL;
@@ -212,7 +212,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
group_info = cred->group_info;
task_unlock(p);
- for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
+ for (g = 0; g < group_info->ngroups; g++)
seq_printf(m, "%d ",
from_kgid_munged(user_ns, GROUP_AT(group_info, g)));
put_cred(cred);
@@ -220,7 +220,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
seq_putc(m, '\n');
}
-static void render_sigset_t(struct seq_file *m, const char *header,
+void render_sigset_t(struct seq_file *m, const char *header,
sigset_t *set)
{
int i;
@@ -308,6 +308,10 @@ static void render_cap_t(struct seq_file *m, const char *header,
seq_putc(m, '\n');
}
+/* Remove non-existent capabilities */
+#define NORM_CAPS(v) (v.cap[CAP_TO_INDEX(CAP_LAST_CAP)] &= \
+ CAP_TO_MASK(CAP_LAST_CAP + 1) - 1)
+
static inline void task_cap(struct seq_file *m, struct task_struct *p)
{
const struct cred *cred;
@@ -321,12 +325,24 @@ static inline void task_cap(struct seq_file *m, struct task_struct *p)
cap_bset = cred->cap_bset;
rcu_read_unlock();
+ NORM_CAPS(cap_inheritable);
+ NORM_CAPS(cap_permitted);
+ NORM_CAPS(cap_effective);
+ NORM_CAPS(cap_bset);
+
render_cap_t(m, "CapInh:\t", &cap_inheritable);
render_cap_t(m, "CapPrm:\t", &cap_permitted);
render_cap_t(m, "CapEff:\t", &cap_effective);
render_cap_t(m, "CapBnd:\t", &cap_bset);
}
+static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
+{
+#ifdef CONFIG_SECCOMP
+ seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode);
+#endif
+}
+
static inline void task_context_switch_counts(struct seq_file *m,
struct task_struct *p)
{
@@ -360,6 +376,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
}
task_sig(m, task);
task_cap(m, task);
+ task_seccomp(m, task);
task_cpus_allowed(m, task);
cpuset_task_status_allowed(m, task);
task_context_switch_counts(m, task);
@@ -438,7 +455,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
min_flt += sig->min_flt;
maj_flt += sig->maj_flt;
- thread_group_times(task, &utime, &stime);
+ thread_group_cputime_adjusted(task, &utime, &stime);
gtime += sig->gtime;
}
@@ -454,7 +471,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
if (!whole) {
min_flt = task->min_flt;
maj_flt = task->maj_flt;
- task_times(task, &utime, &stime);
+ task_cputime_adjusted(task, &utime, &stime);
gtime = task->gtime;
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 144a96732dd7..9b43ff77a51e 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -542,13 +542,6 @@ int proc_setattr(struct dentry *dentry, struct iattr *attr)
if (error)
return error;
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
- if (error)
- return error;
- }
-
setattr_copy(inode, attr);
mark_inode_dirty(inode);
return 0;
@@ -873,12 +866,119 @@ static const struct file_operations proc_environ_operations = {
.release = mem_release,
};
+static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+ char buffer[PROC_NUMBUF];
+ int oom_adj = OOM_ADJUST_MIN;
+ size_t len;
+ unsigned long flags;
+
+ if (!task)
+ return -ESRCH;
+ if (lock_task_sighand(task, &flags)) {
+ if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MAX)
+ oom_adj = OOM_ADJUST_MAX;
+ else
+ oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
+ OOM_SCORE_ADJ_MAX;
+ unlock_task_sighand(task, &flags);
+ }
+ put_task_struct(task);
+ len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
+ return simple_read_from_buffer(buf, count, ppos, buffer, len);
+}
+
+static ssize_t oom_adj_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task;
+ char buffer[PROC_NUMBUF];
+ int oom_adj;
+ unsigned long flags;
+ int err;
+
+ memset(buffer, 0, sizeof(buffer));
+ if (count > sizeof(buffer) - 1)
+ count = sizeof(buffer) - 1;
+ if (copy_from_user(buffer, buf, count)) {
+ err = -EFAULT;
+ goto out;
+ }
+
+ err = kstrtoint(strstrip(buffer), 0, &oom_adj);
+ if (err)
+ goto out;
+ if ((oom_adj < OOM_ADJUST_MIN || oom_adj > OOM_ADJUST_MAX) &&
+ oom_adj != OOM_DISABLE) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ task = get_proc_task(file->f_path.dentry->d_inode);
+ if (!task) {
+ err = -ESRCH;
+ goto out;
+ }
+
+ task_lock(task);
+ if (!task->mm) {
+ err = -EINVAL;
+ goto err_task_lock;
+ }
+
+ if (!lock_task_sighand(task, &flags)) {
+ err = -ESRCH;
+ goto err_task_lock;
+ }
+
+ /*
+ * Scale /proc/pid/oom_score_adj appropriately ensuring that a maximum
+ * value is always attainable.
+ */
+ if (oom_adj == OOM_ADJUST_MAX)
+ oom_adj = OOM_SCORE_ADJ_MAX;
+ else
+ oom_adj = (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE;
+
+ if (oom_adj < task->signal->oom_score_adj &&
+ !capable(CAP_SYS_RESOURCE)) {
+ err = -EACCES;
+ goto err_sighand;
+ }
+
+ /*
+ * /proc/pid/oom_adj is provided for legacy purposes, ask users to use
+ * /proc/pid/oom_score_adj instead.
+ */
+ printk_once(KERN_WARNING "%s (%d): /proc/%d/oom_adj is deprecated, please use /proc/%d/oom_score_adj instead.\n",
+ current->comm, task_pid_nr(current), task_pid_nr(task),
+ task_pid_nr(task));
+
+ task->signal->oom_score_adj = oom_adj;
+ trace_oom_score_adj_update(task);
+err_sighand:
+ unlock_task_sighand(task, &flags);
+err_task_lock:
+ task_unlock(task);
+ put_task_struct(task);
+out:
+ return err < 0 ? err : count;
+}
+
+static const struct file_operations proc_oom_adj_operations = {
+ .read = oom_adj_read,
+ .write = oom_adj_write,
+ .llseek = generic_file_llseek,
+};
+
static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
char buffer[PROC_NUMBUF];
- int oom_score_adj = OOM_SCORE_ADJ_MIN;
+ short oom_score_adj = OOM_SCORE_ADJ_MIN;
unsigned long flags;
size_t len;
@@ -889,7 +989,7 @@ static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
unlock_task_sighand(task, &flags);
}
put_task_struct(task);
- len = snprintf(buffer, sizeof(buffer), "%d\n", oom_score_adj);
+ len = snprintf(buffer, sizeof(buffer), "%hd\n", oom_score_adj);
return simple_read_from_buffer(buf, count, ppos, buffer, len);
}
@@ -936,15 +1036,15 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
goto err_task_lock;
}
- if (oom_score_adj < task->signal->oom_score_adj_min &&
+ if ((short)oom_score_adj < task->signal->oom_score_adj_min &&
!capable(CAP_SYS_RESOURCE)) {
err = -EACCES;
goto err_sighand;
}
- task->signal->oom_score_adj = oom_score_adj;
+ task->signal->oom_score_adj = (short)oom_score_adj;
if (has_capability_noaudit(current, CAP_SYS_RESOURCE))
- task->signal->oom_score_adj_min = oom_score_adj;
+ task->signal->oom_score_adj_min = (short)oom_score_adj;
trace_oom_score_adj_update(task);
err_sighand:
@@ -1770,8 +1870,9 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
if (!vma)
goto out_no_vma;
- result = proc_map_files_instantiate(dir, dentry, task,
- (void *)(unsigned long)vma->vm_file->f_mode);
+ if (vma->vm_file)
+ result = proc_map_files_instantiate(dir, dentry, task,
+ (void *)(unsigned long)vma->vm_file->f_mode);
out_no_vma:
up_read(&mm->mmap_sem);
@@ -2237,146 +2338,6 @@ static const struct file_operations proc_coredump_filter_operations = {
};
#endif
-/*
- * /proc/self:
- */
-static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
- int buflen)
-{
- struct pid_namespace *ns = dentry->d_sb->s_fs_info;
- pid_t tgid = task_tgid_nr_ns(current, ns);
- char tmp[PROC_NUMBUF];
- if (!tgid)
- return -ENOENT;
- sprintf(tmp, "%d", tgid);
- return vfs_readlink(dentry,buffer,buflen,tmp);
-}
-
-static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- struct pid_namespace *ns = dentry->d_sb->s_fs_info;
- pid_t tgid = task_tgid_nr_ns(current, ns);
- char *name = ERR_PTR(-ENOENT);
- if (tgid) {
- /* 11 for max length of signed int in decimal + NULL term */
- name = kmalloc(12, GFP_KERNEL);
- if (!name)
- name = ERR_PTR(-ENOMEM);
- else
- sprintf(name, "%d", tgid);
- }
- nd_set_link(nd, name);
- return NULL;
-}
-
-static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd,
- void *cookie)
-{
- char *s = nd_get_link(nd);
- if (!IS_ERR(s))
- kfree(s);
-}
-
-static const struct inode_operations proc_self_inode_operations = {
- .readlink = proc_self_readlink,
- .follow_link = proc_self_follow_link,
- .put_link = proc_self_put_link,
-};
-
-/*
- * proc base
- *
- * These are the directory entries in the root directory of /proc
- * that properly belong to the /proc filesystem, as they describe
- * describe something that is process related.
- */
-static const struct pid_entry proc_base_stuff[] = {
- NOD("self", S_IFLNK|S_IRWXUGO,
- &proc_self_inode_operations, NULL, {}),
-};
-
-static struct dentry *proc_base_instantiate(struct inode *dir,
- struct dentry *dentry, struct task_struct *task, const void *ptr)
-{
- const struct pid_entry *p = ptr;
- struct inode *inode;
- struct proc_inode *ei;
- struct dentry *error;
-
- /* Allocate the inode */
- error = ERR_PTR(-ENOMEM);
- inode = new_inode(dir->i_sb);
- if (!inode)
- goto out;
-
- /* Initialize the inode */
- ei = PROC_I(inode);
- inode->i_ino = get_next_ino();
- inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-
- /*
- * grab the reference to the task.
- */
- ei->pid = get_task_pid(task, PIDTYPE_PID);
- if (!ei->pid)
- goto out_iput;
-
- inode->i_mode = p->mode;
- if (S_ISDIR(inode->i_mode))
- set_nlink(inode, 2);
- if (S_ISLNK(inode->i_mode))
- inode->i_size = 64;
- if (p->iop)
- inode->i_op = p->iop;
- if (p->fop)
- inode->i_fop = p->fop;
- ei->op = p->op;
- d_add(dentry, inode);
- error = NULL;
-out:
- return error;
-out_iput:
- iput(inode);
- goto out;
-}
-
-static struct dentry *proc_base_lookup(struct inode *dir, struct dentry *dentry)
-{
- struct dentry *error;
- struct task_struct *task = get_proc_task(dir);
- const struct pid_entry *p, *last;
-
- error = ERR_PTR(-ENOENT);
-
- if (!task)
- goto out_no_task;
-
- /* Lookup the directory entry */
- last = &proc_base_stuff[ARRAY_SIZE(proc_base_stuff) - 1];
- for (p = proc_base_stuff; p <= last; p++) {
- if (p->len != dentry->d_name.len)
- continue;
- if (!memcmp(dentry->d_name.name, p->name, p->len))
- break;
- }
- if (p > last)
- goto out;
-
- error = proc_base_instantiate(dir, dentry, task, p);
-
-out:
- put_task_struct(task);
-out_no_task:
- return error;
-}
-
-static int proc_base_fill_cache(struct file *filp, void *dirent,
- filldir_t filldir, struct task_struct *task, const struct pid_entry *p)
-{
- return proc_fill_cache(filp, dirent, filldir, p->name, p->len,
- proc_base_instantiate, task, p);
-}
-
#ifdef CONFIG_TASK_IO_ACCOUNTING
static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
{
@@ -2598,6 +2559,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
@@ -2730,10 +2692,6 @@ void proc_flush_task(struct task_struct *task)
proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr,
tgid->numbers[i].nr);
}
-
- upid = &pid->numbers[pid->level];
- if (upid->nr == 1)
- pid_ns_release_proc(upid->ns);
}
static struct dentry *proc_pid_instantiate(struct inode *dir,
@@ -2767,15 +2725,11 @@ out:
struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- struct dentry *result;
+ struct dentry *result = NULL;
struct task_struct *task;
unsigned tgid;
struct pid_namespace *ns;
- result = proc_base_lookup(dir, dentry);
- if (!IS_ERR(result) || PTR_ERR(result) != -ENOENT)
- goto out;
-
tgid = name_to_int(dentry);
if (tgid == ~0U)
goto out;
@@ -2838,7 +2792,7 @@ retry:
return iter;
}
-#define TGID_OFFSET (FIRST_PROCESS_ENTRY + ARRAY_SIZE(proc_base_stuff))
+#define TGID_OFFSET (FIRST_PROCESS_ENTRY)
static int proc_pid_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
struct tgid_iter iter)
@@ -2858,25 +2812,12 @@ static int fake_filldir(void *buf, const char *name, int namelen,
/* for the /proc/ directory itself, after non-process stuff has been done */
int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
{
- unsigned int nr;
- struct task_struct *reaper;
struct tgid_iter iter;
struct pid_namespace *ns;
filldir_t __filldir;
if (filp->f_pos >= PID_MAX_LIMIT + TGID_OFFSET)
- goto out_no_task;
- nr = filp->f_pos - FIRST_PROCESS_ENTRY;
-
- reaper = get_proc_task(filp->f_path.dentry->d_inode);
- if (!reaper)
- goto out_no_task;
-
- for (; nr < ARRAY_SIZE(proc_base_stuff); filp->f_pos++, nr++) {
- const struct pid_entry *p = &proc_base_stuff[nr];
- if (proc_base_fill_cache(filp, dirent, filldir, reaper, p) < 0)
- goto out;
- }
+ goto out;
ns = filp->f_dentry->d_sb->s_fs_info;
iter.task = NULL;
@@ -2897,8 +2838,6 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
}
filp->f_pos = PID_MAX_LIMIT + TGID_OFFSET;
out:
- put_task_struct(reaper);
-out_no_task:
return 0;
}
@@ -2964,6 +2903,7 @@ static const struct pid_entry tid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index f28a875f8779..d7a4a28ef630 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -50,6 +50,8 @@ static int seq_show(struct seq_file *m, void *v)
if (!ret) {
seq_printf(m, "pos:\t%lli\nflags:\t0%o\n",
(long long)file->f_pos, f_flags);
+ if (file->f_op->show_fdinfo)
+ ret = file->f_op->show_fdinfo(m, file);
fput(file);
}
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 0d80cef4cfb9..76ddae83daa5 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -261,16 +261,9 @@ static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
if (error)
return error;
- if ((iattr->ia_valid & ATTR_SIZE) &&
- iattr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, iattr->ia_size);
- if (error)
- return error;
- }
-
setattr_copy(inode, iattr);
mark_inode_dirty(inode);
-
+
de->uid = inode->i_uid;
de->gid = inode->i_gid;
de->mode = inode->i_mode;
@@ -350,37 +343,39 @@ static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
* Return an inode number between PROC_DYNAMIC_FIRST and
* 0xffffffff, or zero on failure.
*/
-static unsigned int get_inode_number(void)
+int proc_alloc_inum(unsigned int *inum)
{
unsigned int i;
int error;
retry:
- if (ida_pre_get(&proc_inum_ida, GFP_KERNEL) == 0)
- return 0;
+ if (!ida_pre_get(&proc_inum_ida, GFP_KERNEL))
+ return -ENOMEM;
- spin_lock(&proc_inum_lock);
+ spin_lock_irq(&proc_inum_lock);
error = ida_get_new(&proc_inum_ida, &i);
- spin_unlock(&proc_inum_lock);
+ spin_unlock_irq(&proc_inum_lock);
if (error == -EAGAIN)
goto retry;
else if (error)
- return 0;
+ return error;
if (i > UINT_MAX - PROC_DYNAMIC_FIRST) {
- spin_lock(&proc_inum_lock);
+ spin_lock_irq(&proc_inum_lock);
ida_remove(&proc_inum_ida, i);
- spin_unlock(&proc_inum_lock);
- return 0;
+ spin_unlock_irq(&proc_inum_lock);
+ return -ENOSPC;
}
- return PROC_DYNAMIC_FIRST + i;
+ *inum = PROC_DYNAMIC_FIRST + i;
+ return 0;
}
-static void release_inode_number(unsigned int inum)
+void proc_free_inum(unsigned int inum)
{
- spin_lock(&proc_inum_lock);
+ unsigned long flags;
+ spin_lock_irqsave(&proc_inum_lock, flags);
ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
- spin_unlock(&proc_inum_lock);
+ spin_unlock_irqrestore(&proc_inum_lock, flags);
}
static void *proc_follow_link(struct dentry *dentry, struct nameidata *nd)
@@ -554,13 +549,12 @@ static const struct inode_operations proc_dir_inode_operations = {
static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp)
{
- unsigned int i;
struct proc_dir_entry *tmp;
+ int ret;
- i = get_inode_number();
- if (i == 0)
- return -EAGAIN;
- dp->low_ino = i;
+ ret = proc_alloc_inum(&dp->low_ino);
+ if (ret)
+ return ret;
if (S_ISDIR(dp->mode)) {
if (dp->proc_iops == NULL) {
@@ -764,7 +758,7 @@ EXPORT_SYMBOL(proc_create_data);
static void free_proc_entry(struct proc_dir_entry *de)
{
- release_inode_number(de->low_ino);
+ proc_free_inum(de->low_ino);
if (S_ISLNK(de->mode))
kfree(de->data);
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 3b22bbdee9ec..439ae6886507 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -31,6 +31,7 @@ static void proc_evict_inode(struct inode *inode)
struct proc_dir_entry *de;
struct ctl_table_header *head;
const struct proc_ns_operations *ns_ops;
+ void *ns;
truncate_inode_pages(&inode->i_data, 0);
clear_inode(inode);
@@ -49,8 +50,9 @@ static void proc_evict_inode(struct inode *inode)
}
/* Release any associated namespace */
ns_ops = PROC_I(inode)->ns_ops;
- if (ns_ops && ns_ops->put)
- ns_ops->put(PROC_I(inode)->ns);
+ ns = PROC_I(inode)->ns;
+ if (ns_ops && ns)
+ ns_ops->put(ns);
}
static struct kmem_cache * proc_inode_cachep;
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 43973b084abf..252544c05207 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -15,6 +15,7 @@ struct ctl_table_header;
struct mempolicy;
extern struct proc_dir_entry proc_root;
+extern void proc_self_init(void);
#ifdef CONFIG_PROC_SYSCTL
extern int proc_sys_init(void);
extern void sysctl_head_put(struct ctl_table_header *head);
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 86c67eee439f..e96d4f18ca3a 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -249,7 +249,7 @@ static int kcore_update_ram(void)
/* Not inialized....update now */
/* find out "max pfn" */
end_pfn = 0;
- for_each_node_state(nid, N_HIGH_MEMORY) {
+ for_each_node_state(nid, N_MEMORY) {
unsigned long node_end;
node_end = NODE_DATA(nid)->node_start_pfn +
NODE_DATA(nid)->node_spanned_pages;
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index b178ed733c36..b7a47196c8c3 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -11,6 +11,7 @@
#include <net/net_namespace.h>
#include <linux/ipc_namespace.h>
#include <linux/pid_namespace.h>
+#include <linux/user_namespace.h>
#include "internal.h"
@@ -24,12 +25,168 @@ static const struct proc_ns_operations *ns_entries[] = {
#ifdef CONFIG_IPC_NS
&ipcns_operations,
#endif
+#ifdef CONFIG_PID_NS
+ &pidns_operations,
+#endif
+#ifdef CONFIG_USER_NS
+ &userns_operations,
+#endif
+ &mntns_operations,
};
static const struct file_operations ns_file_operations = {
.llseek = no_llseek,
};
+static const struct inode_operations ns_inode_operations = {
+ .setattr = proc_setattr,
+};
+
+static int ns_delete_dentry(const struct dentry *dentry)
+{
+ /* Don't cache namespace inodes when not in use */
+ return 1;
+}
+
+static char *ns_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+ struct inode *inode = dentry->d_inode;
+ const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
+
+ return dynamic_dname(dentry, buffer, buflen, "%s:[%lu]",
+ ns_ops->name, inode->i_ino);
+}
+
+const struct dentry_operations ns_dentry_operations =
+{
+ .d_delete = ns_delete_dentry,
+ .d_dname = ns_dname,
+};
+
+static struct dentry *proc_ns_get_dentry(struct super_block *sb,
+ struct task_struct *task, const struct proc_ns_operations *ns_ops)
+{
+ struct dentry *dentry, *result;
+ struct inode *inode;
+ struct proc_inode *ei;
+ struct qstr qname = { .name = "", };
+ void *ns;
+
+ ns = ns_ops->get(task);
+ if (!ns)
+ return ERR_PTR(-ENOENT);
+
+ dentry = d_alloc_pseudo(sb, &qname);
+ if (!dentry) {
+ ns_ops->put(ns);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ inode = iget_locked(sb, ns_ops->inum(ns));
+ if (!inode) {
+ dput(dentry);
+ ns_ops->put(ns);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ ei = PROC_I(inode);
+ if (inode->i_state & I_NEW) {
+ inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+ inode->i_op = &ns_inode_operations;
+ inode->i_mode = S_IFREG | S_IRUGO;
+ inode->i_fop = &ns_file_operations;
+ ei->ns_ops = ns_ops;
+ ei->ns = ns;
+ unlock_new_inode(inode);
+ } else {
+ ns_ops->put(ns);
+ }
+
+ d_set_d_op(dentry, &ns_dentry_operations);
+ result = d_instantiate_unique(dentry, inode);
+ if (result) {
+ dput(dentry);
+ dentry = result;
+ }
+
+ return dentry;
+}
+
+static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = dentry->d_inode;
+ struct super_block *sb = inode->i_sb;
+ struct proc_inode *ei = PROC_I(inode);
+ struct task_struct *task;
+ struct dentry *ns_dentry;
+ void *error = ERR_PTR(-EACCES);
+
+ task = get_proc_task(inode);
+ if (!task)
+ goto out;
+
+ if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ goto out_put_task;
+
+ ns_dentry = proc_ns_get_dentry(sb, task, ei->ns_ops);
+ if (IS_ERR(ns_dentry)) {
+ error = ERR_CAST(ns_dentry);
+ goto out_put_task;
+ }
+
+ dput(nd->path.dentry);
+ nd->path.dentry = ns_dentry;
+ error = NULL;
+
+out_put_task:
+ put_task_struct(task);
+out:
+ return error;
+}
+
+static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int buflen)
+{
+ struct inode *inode = dentry->d_inode;
+ struct proc_inode *ei = PROC_I(inode);
+ const struct proc_ns_operations *ns_ops = ei->ns_ops;
+ struct task_struct *task;
+ void *ns;
+ char name[50];
+ int len = -EACCES;
+
+ task = get_proc_task(inode);
+ if (!task)
+ goto out;
+
+ if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ goto out_put_task;
+
+ len = -ENOENT;
+ ns = ns_ops->get(task);
+ if (!ns)
+ goto out_put_task;
+
+ snprintf(name, sizeof(name), "%s:[%u]", ns_ops->name, ns_ops->inum(ns));
+ len = strlen(name);
+
+ if (len > buflen)
+ len = buflen;
+ if (copy_to_user(buffer, name, len))
+ len = -EFAULT;
+
+ ns_ops->put(ns);
+out_put_task:
+ put_task_struct(task);
+out:
+ return len;
+}
+
+static const struct inode_operations proc_ns_link_inode_operations = {
+ .readlink = proc_ns_readlink,
+ .follow_link = proc_ns_follow_link,
+ .setattr = proc_setattr,
+};
+
static struct dentry *proc_ns_instantiate(struct inode *dir,
struct dentry *dentry, struct task_struct *task, const void *ptr)
{
@@ -37,21 +194,15 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
struct inode *inode;
struct proc_inode *ei;
struct dentry *error = ERR_PTR(-ENOENT);
- void *ns;
inode = proc_pid_make_inode(dir->i_sb, task);
if (!inode)
goto out;
- ns = ns_ops->get(task);
- if (!ns)
- goto out_iput;
-
ei = PROC_I(inode);
- inode->i_mode = S_IFREG|S_IRUSR;
- inode->i_fop = &ns_file_operations;
- ei->ns_ops = ns_ops;
- ei->ns = ns;
+ inode->i_mode = S_IFLNK|S_IRWXUGO;
+ inode->i_op = &proc_ns_link_inode_operations;
+ ei->ns_ops = ns_ops;
d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
@@ -60,9 +211,6 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
error = NULL;
out:
return error;
-out_iput:
- iput(inode);
- goto out;
}
static int proc_ns_fill_cache(struct file *filp, void *dirent,
@@ -89,10 +237,6 @@ static int proc_ns_dir_readdir(struct file *filp, void *dirent,
if (!task)
goto out_no_task;
- ret = -EPERM;
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
- goto out;
-
ret = 0;
i = filp->f_pos;
switch (i) {
@@ -152,10 +296,6 @@ static struct dentry *proc_ns_dir_lookup(struct inode *dir,
if (!task)
goto out_no_task;
- error = ERR_PTR(-EPERM);
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
- goto out;
-
last = &ns_entries[ARRAY_SIZE(ns_entries)];
for (entry = ns_entries; entry < last; entry++) {
if (strlen((*entry)->name) != len)
@@ -163,7 +303,6 @@ static struct dentry *proc_ns_dir_lookup(struct inode *dir,
if (!memcmp(dentry->d_name.name, (*entry)->name, len))
break;
}
- error = ERR_PTR(-ENOENT);
if (entry == last)
goto out;
@@ -198,3 +337,7 @@ out_invalid:
return ERR_PTR(-EINVAL);
}
+bool proc_ns_inode(struct inode *inode)
+{
+ return inode->i_fop == &ns_file_operations;
+}
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index df7dd08d4391..de20ec480fa0 100644
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -195,11 +195,7 @@ void proc_device_tree_add_node(struct device_node *np,
set_node_proc_entry(np, de);
for (child = NULL; (child = of_get_next_child(np, child));) {
/* Use everything after the last slash, or the full name */
- p = strrchr(child->full_name, '/');
- if (!p)
- p = child->full_name;
- else
- ++p;
+ p = kbasename(child->full_name);
if (duplicate_name(de, p))
p = fixup_name(np, de, p);
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index a781bdf06694..1827d88ad58b 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -378,12 +378,13 @@ static int test_perm(int mode, int op)
return -EACCES;
}
-static int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
+static int sysctl_perm(struct ctl_table_header *head, struct ctl_table *table, int op)
{
+ struct ctl_table_root *root = head->root;
int mode;
if (root->permissions)
- mode = root->permissions(root, current->nsproxy, table);
+ mode = root->permissions(head, table);
else
mode = table->mode;
@@ -491,7 +492,7 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
* and won't be until we finish.
*/
error = -EPERM;
- if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ))
+ if (sysctl_perm(head, table, write ? MAY_WRITE : MAY_READ))
goto out;
/* if that can happen at all, it should be -EINVAL, not -EISDIR */
@@ -717,7 +718,7 @@ static int proc_sys_permission(struct inode *inode, int mask)
if (!table) /* global root - r-xr-xr-x */
error = mask & MAY_WRITE ? -EACCES : 0;
else /* Use the permissions on the sysctl table entry */
- error = sysctl_perm(head->root, table, mask & ~MAY_NOT_BLOCK);
+ error = sysctl_perm(head, table, mask & ~MAY_NOT_BLOCK);
sysctl_head_finish(head);
return error;
@@ -735,13 +736,6 @@ static int proc_sys_setattr(struct dentry *dentry, struct iattr *attr)
if (error)
return error;
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
- if (error)
- return error;
- }
-
setattr_copy(inode, attr);
mark_inode_dirty(inode);
return 0;
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 9889a92d2e01..c6e9fac26bac 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -100,14 +100,13 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
int err;
struct super_block *sb;
struct pid_namespace *ns;
- struct proc_inode *ei;
char *options;
if (flags & MS_KERNMOUNT) {
ns = (struct pid_namespace *)data;
options = NULL;
} else {
- ns = current->nsproxy->pid_ns;
+ ns = task_active_pid_ns(current);
options = data;
}
@@ -130,13 +129,6 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
sb->s_flags |= MS_ACTIVE;
}
- ei = PROC_I(sb->s_root->d_inode);
- if (!ei->pid) {
- rcu_read_lock();
- ei->pid = get_pid(find_pid_ns(1, ns));
- rcu_read_unlock();
- }
-
return dget(sb->s_root);
}
@@ -153,6 +145,7 @@ static struct file_system_type proc_fs_type = {
.name = "proc",
.mount = proc_mount,
.kill_sb = proc_kill_sb,
+ .fs_flags = FS_USERNS_MOUNT,
};
void __init proc_root_init(void)
@@ -163,12 +156,8 @@ void __init proc_root_init(void)
err = register_filesystem(&proc_fs_type);
if (err)
return;
- err = pid_ns_prepare_proc(&init_pid_ns);
- if (err) {
- unregister_filesystem(&proc_fs_type);
- return;
- }
+ proc_self_init();
proc_symlink("mounts", NULL, "self/mounts");
proc_net_init();
diff --git a/fs/proc/self.c b/fs/proc/self.c
new file mode 100644
index 000000000000..aa5cc3bff140
--- /dev/null
+++ b/fs/proc/self.c
@@ -0,0 +1,59 @@
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/namei.h>
+
+/*
+ * /proc/self:
+ */
+static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen)
+{
+ struct pid_namespace *ns = dentry->d_sb->s_fs_info;
+ pid_t tgid = task_tgid_nr_ns(current, ns);
+ char tmp[PROC_NUMBUF];
+ if (!tgid)
+ return -ENOENT;
+ sprintf(tmp, "%d", tgid);
+ return vfs_readlink(dentry,buffer,buflen,tmp);
+}
+
+static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct pid_namespace *ns = dentry->d_sb->s_fs_info;
+ pid_t tgid = task_tgid_nr_ns(current, ns);
+ char *name = ERR_PTR(-ENOENT);
+ if (tgid) {
+ /* 11 for max length of signed int in decimal + NULL term */
+ name = kmalloc(12, GFP_KERNEL);
+ if (!name)
+ name = ERR_PTR(-ENOMEM);
+ else
+ sprintf(name, "%d", tgid);
+ }
+ nd_set_link(nd, name);
+ return NULL;
+}
+
+static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd,
+ void *cookie)
+{
+ char *s = nd_get_link(nd);
+ if (!IS_ERR(s))
+ kfree(s);
+}
+
+static const struct inode_operations proc_self_inode_operations = {
+ .readlink = proc_self_readlink,
+ .follow_link = proc_self_follow_link,
+ .put_link = proc_self_put_link,
+};
+
+void __init proc_self_init(void)
+{
+ struct proc_dir_entry *proc_self_symlink;
+ mode_t mode;
+
+ mode = S_IFLNK | S_IRWXUGO;
+ proc_self_symlink = proc_create("self", mode, NULL, NULL );
+ proc_self_symlink->proc_iops = &proc_self_inode_operations;
+}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 90c63f9392a5..ca5ce7f9f800 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -526,6 +526,57 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
return 0;
}
+static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
+{
+ /*
+ * Don't forget to update Documentation/ on changes.
+ */
+ static const char mnemonics[BITS_PER_LONG][2] = {
+ /*
+ * In case if we meet a flag we don't know about.
+ */
+ [0 ... (BITS_PER_LONG-1)] = "??",
+
+ [ilog2(VM_READ)] = "rd",
+ [ilog2(VM_WRITE)] = "wr",
+ [ilog2(VM_EXEC)] = "ex",
+ [ilog2(VM_SHARED)] = "sh",
+ [ilog2(VM_MAYREAD)] = "mr",
+ [ilog2(VM_MAYWRITE)] = "mw",
+ [ilog2(VM_MAYEXEC)] = "me",
+ [ilog2(VM_MAYSHARE)] = "ms",
+ [ilog2(VM_GROWSDOWN)] = "gd",
+ [ilog2(VM_PFNMAP)] = "pf",
+ [ilog2(VM_DENYWRITE)] = "dw",
+ [ilog2(VM_LOCKED)] = "lo",
+ [ilog2(VM_IO)] = "io",
+ [ilog2(VM_SEQ_READ)] = "sr",
+ [ilog2(VM_RAND_READ)] = "rr",
+ [ilog2(VM_DONTCOPY)] = "dc",
+ [ilog2(VM_DONTEXPAND)] = "de",
+ [ilog2(VM_ACCOUNT)] = "ac",
+ [ilog2(VM_NORESERVE)] = "nr",
+ [ilog2(VM_HUGETLB)] = "ht",
+ [ilog2(VM_NONLINEAR)] = "nl",
+ [ilog2(VM_ARCH_1)] = "ar",
+ [ilog2(VM_DONTDUMP)] = "dd",
+ [ilog2(VM_MIXEDMAP)] = "mm",
+ [ilog2(VM_HUGEPAGE)] = "hg",
+ [ilog2(VM_NOHUGEPAGE)] = "nh",
+ [ilog2(VM_MERGEABLE)] = "mg",
+ };
+ size_t i;
+
+ seq_puts(m, "VmFlags: ");
+ for (i = 0; i < BITS_PER_LONG; i++) {
+ if (vma->vm_flags & (1UL << i)) {
+ seq_printf(m, "%c%c ",
+ mnemonics[i][0], mnemonics[i][1]);
+ }
+ }
+ seq_putc(m, '\n');
+}
+
static int show_smap(struct seq_file *m, void *v, int is_pid)
{
struct proc_maps_private *priv = m->private;
@@ -581,6 +632,8 @@ static int show_smap(struct seq_file *m, void *v, int is_pid)
seq_printf(m, "Nonlinear: %8lu kB\n",
mss.nonlinear >> 10);
+ show_smap_vma_flags(m, vma);
+
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task->mm))
? vma->vm_start : 0;
@@ -643,7 +696,7 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
spinlock_t *ptl;
struct page *page;
- split_huge_page_pmd(walk->mm, pmd);
+ split_huge_page_pmd(vma, addr, pmd);
if (pmd_trans_unstable(pmd))
return 0;
@@ -1126,7 +1179,7 @@ static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
return NULL;
nid = page_to_nid(page);
- if (!node_isset(nid, node_states[N_HIGH_MEMORY]))
+ if (!node_isset(nid, node_states[N_MEMORY]))
return NULL;
return page;
@@ -1225,7 +1278,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
walk.mm = mm;
pol = get_vma_policy(task, vma, vma->vm_start);
- mpol_to_str(buffer, sizeof(buffer), pol, 0);
+ mpol_to_str(buffer, sizeof(buffer), pol);
mpol_cond_put(pol);
seq_printf(m, "%08lx %s", vma->vm_start, buffer);
@@ -1279,7 +1332,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
if (md->writeback)
seq_printf(m, " writeback=%lu", md->writeback);
- for_each_node_state(n, N_HIGH_MEMORY)
+ for_each_node_state(n, N_MEMORY)
if (md->node[n])
seq_printf(m, " N%d=%lu", n, md->node[n]);
out:
diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c
index 2d57e1ac0115..43b12807a51d 100644
--- a/fs/pstore/ftrace.c
+++ b/fs/pstore/ftrace.c
@@ -28,7 +28,9 @@
#include "internal.h"
static void notrace pstore_ftrace_call(unsigned long ip,
- unsigned long parent_ip)
+ unsigned long parent_ip,
+ struct ftrace_ops *op,
+ struct pt_regs *regs)
{
unsigned long flags;
struct pstore_ftrace_record rec = {};
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 4ab572e6d277..67de74ca85f4 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -49,6 +49,7 @@ struct pstore_private {
struct pstore_info *psi;
enum pstore_type_id type;
u64 id;
+ int count;
ssize_t size;
char data[];
};
@@ -150,13 +151,13 @@ static int pstore_file_open(struct inode *inode, struct file *file)
return 0;
}
-static loff_t pstore_file_llseek(struct file *file, loff_t off, int origin)
+static loff_t pstore_file_llseek(struct file *file, loff_t off, int whence)
{
struct seq_file *sf = file->private_data;
if (sf->op)
- return seq_lseek(file, off, origin);
- return default_llseek(file, off, origin);
+ return seq_lseek(file, off, whence);
+ return default_llseek(file, off, whence);
}
static const struct file_operations pstore_file_operations = {
@@ -175,7 +176,8 @@ static int pstore_unlink(struct inode *dir, struct dentry *dentry)
struct pstore_private *p = dentry->d_inode->i_private;
if (p->psi->erase)
- p->psi->erase(p->type, p->id, p->psi);
+ p->psi->erase(p->type, p->id, p->count,
+ dentry->d_inode->i_ctime, p->psi);
return simple_unlink(dir, dentry);
}
@@ -270,7 +272,7 @@ int pstore_is_mounted(void)
* Load it up with "size" bytes of data from "buf".
* Set the mtime & ctime to the date that this record was originally stored.
*/
-int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id,
+int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
char *data, size_t size, struct timespec time,
struct pstore_info *psi)
{
@@ -306,6 +308,7 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id,
goto fail_alloc;
private->type = type;
private->id = id;
+ private->count = count;
private->psi = psi;
switch (type) {
diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h
index 4847f588b7d5..937d820f273c 100644
--- a/fs/pstore/internal.h
+++ b/fs/pstore/internal.h
@@ -50,7 +50,7 @@ extern struct pstore_info *psinfo;
extern void pstore_set_kmsg_bytes(int);
extern void pstore_get_records(int);
extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
- char *data, size_t size,
+ int count, char *data, size_t size,
struct timespec time, struct pstore_info *psi);
extern int pstore_is_mounted(void);
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index a40da07e93d6..5ea2e77ff023 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -136,7 +136,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
break;
ret = psinfo->write(PSTORE_TYPE_DMESG, reason, &id, part,
- hsize + len, psinfo);
+ oopscount, hsize + len, psinfo);
if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted())
pstore_new_entry = 1;
@@ -161,6 +161,7 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
while (s < e) {
unsigned long flags;
+ u64 id;
if (c > psinfo->bufsize)
c = psinfo->bufsize;
@@ -172,7 +173,7 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
spin_lock_irqsave(&psinfo->buf_lock, flags);
}
memcpy(psinfo->buf, s, c);
- psinfo->write(PSTORE_TYPE_CONSOLE, 0, NULL, 0, c, psinfo);
+ psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, 0, c, psinfo);
spin_unlock_irqrestore(&psinfo->buf_lock, flags);
s += c;
c = e - s;
@@ -196,7 +197,7 @@ static void pstore_register_console(void) {}
static int pstore_write_compat(enum pstore_type_id type,
enum kmsg_dump_reason reason,
- u64 *id, unsigned int part,
+ u64 *id, unsigned int part, int count,
size_t size, struct pstore_info *psi)
{
return psi->write_buf(type, reason, id, part, psinfo->buf, size, psi);
@@ -266,6 +267,7 @@ void pstore_get_records(int quiet)
char *buf = NULL;
ssize_t size;
u64 id;
+ int count;
enum pstore_type_id type;
struct timespec time;
int failed = 0, rc;
@@ -277,9 +279,9 @@ void pstore_get_records(int quiet)
if (psi->open && psi->open(psi))
goto out;
- while ((size = psi->read(&id, &type, &time, &buf, psi)) > 0) {
- rc = pstore_mkfile(type, psi->name, id, buf, (size_t)size,
- time, psi);
+ while ((size = psi->read(&id, &type, &count, &time, &buf, psi)) > 0) {
+ rc = pstore_mkfile(type, psi->name, id, count, buf,
+ (size_t)size, time, psi);
kfree(buf);
buf = NULL;
if (rc && (rc != -EEXIST || !quiet))
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 1a4f6da58eab..7003e5266f25 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -132,9 +132,8 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
}
static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type,
- struct timespec *time,
- char **buf,
- struct pstore_info *psi)
+ int *count, struct timespec *time,
+ char **buf, struct pstore_info *psi)
{
ssize_t size;
struct ramoops_context *cxt = psi->data;
@@ -189,7 +188,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
struct pstore_info *psi)
{
struct ramoops_context *cxt = psi->data;
- struct persistent_ram_zone *prz = cxt->przs[cxt->dump_write_cnt];
+ struct persistent_ram_zone *prz;
size_t hlen;
if (type == PSTORE_TYPE_CONSOLE) {
@@ -226,6 +225,11 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
if (part != 1)
return -ENOSPC;
+ if (!cxt->przs)
+ return -ENOSPC;
+
+ prz = cxt->przs[cxt->dump_write_cnt];
+
hlen = ramoops_write_kmsg_hdr(prz);
if (size + hlen > prz->buffer_size)
size = prz->buffer_size - hlen;
@@ -236,8 +240,8 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
return 0;
}
-static int ramoops_pstore_erase(enum pstore_type_id type, u64 id,
- struct pstore_info *psi)
+static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, int count,
+ struct timespec time, struct pstore_info *psi)
{
struct ramoops_context *cxt = psi->data;
struct persistent_ram_zone *prz;
@@ -288,7 +292,7 @@ static void ramoops_free_przs(struct ramoops_context *cxt)
}
static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
- phys_addr_t *paddr, size_t dump_mem_sz)
+ phys_addr_t *paddr, size_t dump_mem_sz)
{
int err = -ENOMEM;
int i;
@@ -296,6 +300,11 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
if (!cxt->record_size)
return 0;
+ if (*paddr + dump_mem_sz - cxt->phys_addr > cxt->size) {
+ dev_err(dev, "no room for dumps\n");
+ return -ENOMEM;
+ }
+
cxt->max_dump_cnt = dump_mem_sz / cxt->record_size;
if (!cxt->max_dump_cnt)
return -ENOMEM;
@@ -333,8 +342,12 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
if (!sz)
return 0;
- if (*paddr + sz > *paddr + cxt->size)
+ if (*paddr + sz - cxt->phys_addr > cxt->size) {
+ dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
+ sz, (unsigned long long)*paddr,
+ cxt->size, (unsigned long long)cxt->phys_addr);
return -ENOMEM;
+ }
*prz = persistent_ram_new(*paddr, sz, sig, cxt->ecc_size);
if (IS_ERR(*prz)) {
@@ -352,7 +365,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
return 0;
}
-static int __devinit ramoops_probe(struct platform_device *pdev)
+static int ramoops_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ramoops_platform_data *pdata = pdev->dev.platform_data;
@@ -374,10 +387,14 @@ static int __devinit ramoops_probe(struct platform_device *pdev)
goto fail_out;
}
- pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
- pdata->record_size = rounddown_pow_of_two(pdata->record_size);
- pdata->console_size = rounddown_pow_of_two(pdata->console_size);
- pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
+ if (!is_power_of_2(pdata->mem_size))
+ pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
+ if (!is_power_of_2(pdata->record_size))
+ pdata->record_size = rounddown_pow_of_two(pdata->record_size);
+ if (!is_power_of_2(pdata->console_size))
+ pdata->console_size = rounddown_pow_of_two(pdata->console_size);
+ if (!is_power_of_2(pdata->ftrace_size))
+ pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
cxt->dump_read_cnt = 0;
cxt->size = pdata->mem_size;
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index eecd2a8a84dd..0306303be372 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -390,8 +390,8 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size,
return 0;
}
-static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz,
- u32 sig, int ecc_size)
+static int persistent_ram_post_init(struct persistent_ram_zone *prz, u32 sig,
+ int ecc_size)
{
int ret;
@@ -443,9 +443,8 @@ void persistent_ram_free(struct persistent_ram_zone *prz)
kfree(prz);
}
-struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start,
- size_t size, u32 sig,
- int ecc_size)
+struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
+ u32 sig, int ecc_size)
{
struct persistent_ram_zone *prz;
int ret = -ENOMEM;
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index af1661f7a54f..c7314f1771f5 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -307,6 +307,8 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
}
}
+#ifdef CONFIG_BLOCK
+
/* Return 1 if 'cmd' will block on frozen filesystem */
static int quotactl_cmd_write(int cmd)
{
@@ -322,6 +324,8 @@ static int quotactl_cmd_write(int cmd)
return 1;
}
+#endif /* CONFIG_BLOCK */
+
/*
* look up a superblock on which quota ops will be performed
* - use the name of a block device to find the superblock thereon
diff --git a/fs/read_write.c b/fs/read_write.c
index d06534857e9e..bb34af315280 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -54,7 +54,7 @@ static loff_t lseek_execute(struct file *file, struct inode *inode,
* generic_file_llseek_size - generic llseek implementation for regular files
* @file: file structure to seek on
* @offset: file offset to seek to
- * @origin: type of seek
+ * @whence: type of seek
* @size: max size of this file in file system
* @eof: offset used for SEEK_END position
*
@@ -67,12 +67,12 @@ static loff_t lseek_execute(struct file *file, struct inode *inode,
* read/writes behave like SEEK_SET against seeks.
*/
loff_t
-generic_file_llseek_size(struct file *file, loff_t offset, int origin,
+generic_file_llseek_size(struct file *file, loff_t offset, int whence,
loff_t maxsize, loff_t eof)
{
struct inode *inode = file->f_mapping->host;
- switch (origin) {
+ switch (whence) {
case SEEK_END:
offset += eof;
break;
@@ -122,17 +122,17 @@ EXPORT_SYMBOL(generic_file_llseek_size);
* generic_file_llseek - generic llseek implementation for regular files
* @file: file structure to seek on
* @offset: file offset to seek to
- * @origin: type of seek
+ * @whence: type of seek
*
* This is a generic implemenation of ->llseek useable for all normal local
* filesystems. It just updates the file offset to the value specified by
- * @offset and @origin under i_mutex.
+ * @offset and @whence under i_mutex.
*/
-loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
+loff_t generic_file_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
- return generic_file_llseek_size(file, offset, origin,
+ return generic_file_llseek_size(file, offset, whence,
inode->i_sb->s_maxbytes,
i_size_read(inode));
}
@@ -142,32 +142,32 @@ EXPORT_SYMBOL(generic_file_llseek);
* noop_llseek - No Operation Performed llseek implementation
* @file: file structure to seek on
* @offset: file offset to seek to
- * @origin: type of seek
+ * @whence: type of seek
*
* This is an implementation of ->llseek useable for the rare special case when
* userspace expects the seek to succeed but the (device) file is actually not
* able to perform the seek. In this case you use noop_llseek() instead of
* falling back to the default implementation of ->llseek.
*/
-loff_t noop_llseek(struct file *file, loff_t offset, int origin)
+loff_t noop_llseek(struct file *file, loff_t offset, int whence)
{
return file->f_pos;
}
EXPORT_SYMBOL(noop_llseek);
-loff_t no_llseek(struct file *file, loff_t offset, int origin)
+loff_t no_llseek(struct file *file, loff_t offset, int whence)
{
return -ESPIPE;
}
EXPORT_SYMBOL(no_llseek);
-loff_t default_llseek(struct file *file, loff_t offset, int origin)
+loff_t default_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_path.dentry->d_inode;
loff_t retval;
mutex_lock(&inode->i_mutex);
- switch (origin) {
+ switch (whence) {
case SEEK_END:
offset += i_size_read(inode);
break;
@@ -216,7 +216,7 @@ out:
}
EXPORT_SYMBOL(default_llseek);
-loff_t vfs_llseek(struct file *file, loff_t offset, int origin)
+loff_t vfs_llseek(struct file *file, loff_t offset, int whence)
{
loff_t (*fn)(struct file *, loff_t, int);
@@ -225,11 +225,11 @@ loff_t vfs_llseek(struct file *file, loff_t offset, int origin)
if (file->f_op && file->f_op->llseek)
fn = file->f_op->llseek;
}
- return fn(file, offset, origin);
+ return fn(file, offset, whence);
}
EXPORT_SYMBOL(vfs_llseek);
-SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, origin)
+SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, whence)
{
off_t retval;
struct fd f = fdget(fd);
@@ -237,8 +237,8 @@ SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, origin)
return -EBADF;
retval = -EINVAL;
- if (origin <= SEEK_MAX) {
- loff_t res = vfs_llseek(f.file, offset, origin);
+ if (whence <= SEEK_MAX) {
+ loff_t res = vfs_llseek(f.file, offset, whence);
retval = res;
if (res != (loff_t)retval)
retval = -EOVERFLOW; /* LFS: should only happen on 32 bit platforms */
@@ -250,7 +250,7 @@ SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, origin)
#ifdef __ARCH_WANT_SYS_LLSEEK
SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
unsigned long, offset_low, loff_t __user *, result,
- unsigned int, origin)
+ unsigned int, whence)
{
int retval;
struct fd f = fdget(fd);
@@ -260,11 +260,11 @@ SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
return -EBADF;
retval = -EINVAL;
- if (origin > SEEK_MAX)
+ if (whence > SEEK_MAX)
goto out_putf;
offset = vfs_llseek(f.file, ((loff_t) offset_high << 32) | offset_low,
- origin);
+ whence);
retval = (int)offset;
if (offset >= 0) {
@@ -935,6 +935,8 @@ ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count,
if (retval > 0) {
add_rchar(current, retval);
add_wchar(current, retval);
+ fsnotify_access(in.file);
+ fsnotify_modify(out.file);
}
inc_syscr(current);
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 8375c922c0d5..50302d6f8895 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -126,7 +126,7 @@ static int reiserfs_file_open(struct inode *inode, struct file *file)
return err;
}
-static void reiserfs_vfs_truncate_file(struct inode *inode)
+void reiserfs_vfs_truncate_file(struct inode *inode)
{
mutex_lock(&(REISERFS_I(inode)->tailpack));
reiserfs_truncate_file(inode, 1);
@@ -312,7 +312,6 @@ const struct file_operations reiserfs_file_operations = {
};
const struct inode_operations reiserfs_file_inode_operations = {
- .truncate = reiserfs_vfs_truncate_file,
.setattr = reiserfs_setattr,
.setxattr = reiserfs_setxattr,
.getxattr = reiserfs_getxattr,
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index f27f01a98aa2..95d7680ead47 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1782,8 +1782,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
BUG_ON(!th->t_trans_id);
- dquot_initialize(inode);
+ reiserfs_write_unlock(inode->i_sb);
err = dquot_alloc_inode(inode);
+ reiserfs_write_lock(inode->i_sb);
if (err)
goto out_end_trans;
if (!dir->i_nlink) {
@@ -1979,8 +1980,10 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
out_end_trans:
journal_end(th, th->t_super, th->t_blocks_allocated);
+ reiserfs_write_unlock(inode->i_sb);
/* Drop can be outside and it needs more credits so it's better to have it outside */
dquot_drop(inode);
+ reiserfs_write_lock(inode->i_sb);
inode->i_flags |= S_NOQUOTA;
make_bad_inode(inode);
@@ -3082,8 +3085,10 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
loff_t isize = i_size_read(inode);
loff_t end = offset + iov_length(iov, nr_segs);
- if (end > isize)
- vmtruncate(inode, isize);
+ if ((end > isize) && inode_newsize_ok(inode, isize) == 0) {
+ truncate_setsize(inode, isize);
+ reiserfs_vfs_truncate_file(inode);
+ }
}
return ret;
@@ -3103,10 +3108,9 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
/* must be turned off for recursive notify_change calls */
ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
- depth = reiserfs_write_lock_once(inode->i_sb);
if (is_quota_modification(inode, attr))
dquot_initialize(inode);
-
+ depth = reiserfs_write_lock_once(inode->i_sb);
if (attr->ia_valid & ATTR_SIZE) {
/* version 2 items will be caught by the s_maxbytes check
** done for us in vmtruncate
@@ -3170,7 +3174,9 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
error = journal_begin(&th, inode->i_sb, jbegin_count);
if (error)
goto out;
+ reiserfs_write_unlock_once(inode->i_sb, depth);
error = dquot_transfer(inode, attr);
+ depth = reiserfs_write_lock_once(inode->i_sb);
if (error) {
journal_end(&th, inode->i_sb, jbegin_count);
goto out;
@@ -3196,8 +3202,13 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
*/
reiserfs_write_unlock_once(inode->i_sb, depth);
if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size != i_size_read(inode))
- error = vmtruncate(inode, attr->ia_size);
+ attr->ia_size != i_size_read(inode)) {
+ error = inode_newsize_ok(inode, attr->ia_size);
+ if (!error) {
+ truncate_setsize(inode, attr->ia_size);
+ reiserfs_vfs_truncate_file(inode);
+ }
+ }
if (!error) {
setattr_copy(inode, attr);
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 33215f57ea06..157e474ab303 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -2455,6 +2455,7 @@ struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct
*,
int count);
int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *);
+void reiserfs_vfs_truncate_file(struct inode *inode);
int reiserfs_commit_page(struct inode *inode, struct page *page,
unsigned from, unsigned to);
void reiserfs_flush_old_commits(struct super_block *);
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c
index f8afa4b162b8..2f40a4c70a4d 100644
--- a/fs/reiserfs/stree.c
+++ b/fs/reiserfs/stree.c
@@ -1968,7 +1968,9 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree
key2type(&(key->on_disk_key)));
#endif
+ reiserfs_write_unlock(inode->i_sb);
retval = dquot_alloc_space_nodirty(inode, pasted_size);
+ reiserfs_write_lock(inode->i_sb);
if (retval) {
pathrelse(search_path);
return retval;
@@ -2061,9 +2063,11 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th,
"reiserquota insert_item(): allocating %u id=%u type=%c",
quota_bytes, inode->i_uid, head2type(ih));
#endif
+ reiserfs_write_unlock(inode->i_sb);
/* We can't dirty inode here. It would be immediately written but
* appropriate stat item isn't inserted yet... */
retval = dquot_alloc_space_nodirty(inode, quota_bytes);
+ reiserfs_write_lock(inode->i_sb);
if (retval) {
pathrelse(path);
return retval;
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 1078ae179993..418bdc3a57da 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -298,7 +298,9 @@ static int finish_unfinished(struct super_block *s)
retval = remove_save_link_only(s, &save_link_key, 0);
continue;
}
+ reiserfs_write_unlock(s);
dquot_initialize(inode);
+ reiserfs_write_lock(s);
if (truncate && S_ISDIR(inode->i_mode)) {
/* We got a truncate request for a dir which is impossible.
@@ -1335,7 +1337,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
kfree(qf_names[i]);
#endif
err = -EINVAL;
- goto out_err;
+ goto out_unlock;
}
#ifdef CONFIG_QUOTA
handle_quota_files(s, qf_names, &qfmt);
@@ -1379,7 +1381,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
if (blocks) {
err = reiserfs_resize(s, blocks);
if (err != 0)
- goto out_err;
+ goto out_unlock;
}
if (*mount_flags & MS_RDONLY) {
@@ -1389,9 +1391,15 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
/* it is read-only already */
goto out_ok;
+ /*
+ * Drop write lock. Quota will retake it when needed and lock
+ * ordering requires calling dquot_suspend() without it.
+ */
+ reiserfs_write_unlock(s);
err = dquot_suspend(s, -1);
if (err < 0)
goto out_err;
+ reiserfs_write_lock(s);
/* try to remount file system with read-only permissions */
if (sb_umount_state(rs) == REISERFS_VALID_FS
@@ -1401,7 +1409,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
err = journal_begin(&th, s, 10);
if (err)
- goto out_err;
+ goto out_unlock;
/* Mounting a rw partition read-only. */
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
@@ -1416,7 +1424,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
if (reiserfs_is_journal_aborted(journal)) {
err = journal->j_errno;
- goto out_err;
+ goto out_unlock;
}
handle_data_mode(s, mount_options);
@@ -1425,7 +1433,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
err = journal_begin(&th, s, 10);
if (err)
- goto out_err;
+ goto out_unlock;
/* Mount a partition which is read-only, read-write */
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
@@ -1442,10 +1450,16 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
SB_JOURNAL(s)->j_must_wait = 1;
err = journal_end(&th, s, 10);
if (err)
- goto out_err;
+ goto out_unlock;
if (!(*mount_flags & MS_RDONLY)) {
+ /*
+ * Drop write lock. Quota will retake it when needed and lock
+ * ordering requires calling dquot_resume() without it.
+ */
+ reiserfs_write_unlock(s);
dquot_resume(s, -1);
+ reiserfs_write_lock(s);
finish_unfinished(s);
reiserfs_xattr_init(s, *mount_flags);
}
@@ -1455,9 +1469,10 @@ out_ok:
reiserfs_write_unlock(s);
return 0;
+out_unlock:
+ reiserfs_write_unlock(s);
out_err:
kfree(new_opts);
- reiserfs_write_unlock(s);
return err;
}
@@ -2095,13 +2110,15 @@ static int reiserfs_write_dquot(struct dquot *dquot)
REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
if (ret)
goto out;
+ reiserfs_write_unlock(dquot->dq_sb);
ret = dquot_commit(dquot);
+ reiserfs_write_lock(dquot->dq_sb);
err =
journal_end(&th, dquot->dq_sb,
REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
if (!ret && err)
ret = err;
- out:
+out:
reiserfs_write_unlock(dquot->dq_sb);
return ret;
}
@@ -2117,13 +2134,15 @@ static int reiserfs_acquire_dquot(struct dquot *dquot)
REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
if (ret)
goto out;
+ reiserfs_write_unlock(dquot->dq_sb);
ret = dquot_acquire(dquot);
+ reiserfs_write_lock(dquot->dq_sb);
err =
journal_end(&th, dquot->dq_sb,
REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
if (!ret && err)
ret = err;
- out:
+out:
reiserfs_write_unlock(dquot->dq_sb);
return ret;
}
@@ -2137,19 +2156,21 @@ static int reiserfs_release_dquot(struct dquot *dquot)
ret =
journal_begin(&th, dquot->dq_sb,
REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
+ reiserfs_write_unlock(dquot->dq_sb);
if (ret) {
/* Release dquot anyway to avoid endless cycle in dqput() */
dquot_release(dquot);
goto out;
}
ret = dquot_release(dquot);
+ reiserfs_write_lock(dquot->dq_sb);
err =
journal_end(&th, dquot->dq_sb,
REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
if (!ret && err)
ret = err;
- out:
reiserfs_write_unlock(dquot->dq_sb);
+out:
return ret;
}
@@ -2174,11 +2195,13 @@ static int reiserfs_write_info(struct super_block *sb, int type)
ret = journal_begin(&th, sb, 2);
if (ret)
goto out;
+ reiserfs_write_unlock(sb);
ret = dquot_commit_info(sb, type);
+ reiserfs_write_lock(sb);
err = journal_end(&th, sb, 2);
if (!ret && err)
ret = err;
- out:
+out:
reiserfs_write_unlock(sb);
return ret;
}
@@ -2203,8 +2226,11 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
struct reiserfs_transaction_handle th;
int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA;
- if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt)))
- return -EINVAL;
+ reiserfs_write_lock(sb);
+ if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) {
+ err = -EINVAL;
+ goto out;
+ }
/* Quotafile not on the same filesystem? */
if (path->dentry->d_sb != sb) {
@@ -2246,8 +2272,10 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
if (err)
goto out;
}
- err = dquot_quota_on(sb, type, format_id, path);
+ reiserfs_write_unlock(sb);
+ return dquot_quota_on(sb, type, format_id, path);
out:
+ reiserfs_write_unlock(sb);
return err;
}
@@ -2320,7 +2348,9 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
tocopy = sb->s_blocksize - offset < towrite ?
sb->s_blocksize - offset : towrite;
tmp_bh.b_state = 0;
+ reiserfs_write_lock(sb);
err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
+ reiserfs_write_unlock(sb);
if (err)
goto out;
if (offset || tocopy != sb->s_blocksize)
@@ -2336,10 +2366,12 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
flush_dcache_page(bh->b_page);
set_buffer_uptodate(bh);
unlock_buffer(bh);
+ reiserfs_write_lock(sb);
reiserfs_prepare_for_journal(sb, bh, 1);
journal_mark_dirty(current->journal_info, sb, bh);
if (!journal_quota)
reiserfs_add_ordered_list(inode, bh);
+ reiserfs_write_unlock(sb);
brelse(bh);
offset = 0;
towrite -= tocopy;
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 99dffab4c4e4..f2bc3dfd0b88 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -296,18 +296,18 @@ EXPORT_SYMBOL(seq_read);
* seq_lseek - ->llseek() method for sequential files.
* @file: the file in question
* @offset: new position
- * @origin: 0 for absolute, 1 for relative position
+ * @whence: 0 for absolute, 1 for relative position
*
* Ready-made ->f_op->llseek()
*/
-loff_t seq_lseek(struct file *file, loff_t offset, int origin)
+loff_t seq_lseek(struct file *file, loff_t offset, int whence)
{
struct seq_file *m = file->private_data;
loff_t retval = -EINVAL;
mutex_lock(&m->lock);
m->version = file->f_version;
- switch (origin) {
+ switch (whence) {
case 1:
offset += file->f_pos;
case 0:
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 8bee4e570911..b53486961735 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -29,6 +29,7 @@
#include <linux/anon_inodes.h>
#include <linux/signalfd.h>
#include <linux/syscalls.h>
+#include <linux/proc_fs.h>
void signalfd_cleanup(struct sighand_struct *sighand)
{
@@ -227,7 +228,24 @@ static ssize_t signalfd_read(struct file *file, char __user *buf, size_t count,
return total ? total: ret;
}
+#ifdef CONFIG_PROC_FS
+static int signalfd_show_fdinfo(struct seq_file *m, struct file *f)
+{
+ struct signalfd_ctx *ctx = f->private_data;
+ sigset_t sigmask;
+
+ sigmask = ctx->sigmask;
+ signotset(&sigmask);
+ render_sigset_t(m, "sigmask:\t", &sigmask);
+
+ return 0;
+}
+#endif
+
static const struct file_operations signalfd_fops = {
+#ifdef CONFIG_PROC_FS
+ .show_fdinfo = signalfd_show_fdinfo,
+#endif
.release = signalfd_release,
.poll = signalfd_poll,
.read = signalfd_read,
diff --git a/fs/splice.c b/fs/splice.c
index 13e5b4776e7a..6909d89d0da5 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -696,8 +696,10 @@ static int pipe_to_sendpage(struct pipe_inode_info *pipe,
return -EINVAL;
more = (sd->flags & SPLICE_F_MORE) ? MSG_MORE : 0;
- if (sd->len < sd->total_len)
+
+ if (sd->len < sd->total_len && pipe->nrbufs > 1)
more |= MSG_SENDPAGE_NOTLAST;
+
return file->f_op->sendpage(file, buf->page, buf->offset,
sd->len, &pos, more);
}
@@ -1024,17 +1026,14 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
ret = sd.num_spliced;
if (ret > 0) {
- unsigned long nr_pages;
int err;
- nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
err = generic_write_sync(out, *ppos, ret);
if (err)
ret = err;
else
*ppos += ret;
- balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
+ balance_dirty_pages_ratelimited(mapping);
}
sb_end_write(inode->i_sb);
diff --git a/fs/stat.c b/fs/stat.c
index eae494630a36..14f45459c83d 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -74,7 +74,7 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
{
struct path path;
int error = -EINVAL;
- int lookup_flags = 0;
+ unsigned int lookup_flags = 0;
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
AT_EMPTY_PATH)) != 0)
@@ -84,13 +84,17 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
lookup_flags |= LOOKUP_FOLLOW;
if (flag & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
-
+retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
error = vfs_getattr(path.mnt, path.dentry, stat);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}
@@ -296,11 +300,13 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
struct path path;
int error;
int empty = 0;
+ unsigned int lookup_flags = LOOKUP_EMPTY;
if (bufsiz <= 0)
return -EINVAL;
- error = user_path_at_empty(dfd, pathname, LOOKUP_EMPTY, &path, &empty);
+retry:
+ error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty);
if (!error) {
struct inode *inode = path.dentry->d_inode;
@@ -314,6 +320,10 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
}
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
}
return error;
}
diff --git a/fs/statfs.c b/fs/statfs.c
index f8e832e6f0a2..c219e733f553 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -77,10 +77,17 @@ EXPORT_SYMBOL(vfs_statfs);
int user_statfs(const char __user *pathname, struct kstatfs *st)
{
struct path path;
- int error = user_path_at(AT_FDCWD, pathname, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path);
+ int error;
+ unsigned int lookup_flags = LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (!error) {
error = vfs_statfs(&path, st);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
}
return error;
}
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 00012e31829d..602f56db0442 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -485,8 +485,8 @@ const struct file_operations sysfs_file_operations = {
.poll = sysfs_poll,
};
-int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
- const void **pns)
+static int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
+ const void **pns)
{
struct sysfs_dirent *dir_sd = kobj->sd;
const struct sysfs_ops *ops;
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 71eb7e253927..db940a9be045 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -149,6 +149,7 @@ static struct file_system_type sysfs_fs_type = {
.name = "sysfs",
.mount = sysfs_mount,
.kill_sb = sysfs_kill_sb,
+ .fs_flags = FS_USERNS_MOUNT,
};
int __init sysfs_init(void)
diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index 0a65939508e9..9d4dc6831792 100644
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -41,9 +41,11 @@ static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
- error = vmtruncate(inode, attr->ia_size);
+ error = inode_newsize_ok(inode, attr->ia_size);
if (error)
return error;
+ truncate_setsize(inode, attr->ia_size);
+ sysv_truncate(inode);
}
setattr_copy(inode, attr);
@@ -52,7 +54,6 @@ static int sysv_setattr(struct dentry *dentry, struct iattr *attr)
}
const struct inode_operations sysv_file_inode_operations = {
- .truncate = sysv_truncate,
.setattr = sysv_setattr,
.getattr = sysv_getattr,
};
diff --git a/fs/sysv/itree.c b/fs/sysv/itree.c
index 90b54b438789..c1a591a4725b 100644
--- a/fs/sysv/itree.c
+++ b/fs/sysv/itree.c
@@ -464,6 +464,16 @@ int sysv_prepare_chunk(struct page *page, loff_t pos, unsigned len)
return __block_write_begin(page, pos, len, get_block);
}
+static void sysv_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, to, inode->i_size);
+ sysv_truncate(inode);
+ }
+}
+
static int sysv_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -471,11 +481,8 @@ static int sysv_write_begin(struct file *file, struct address_space *mapping,
int ret;
ret = block_write_begin(mapping, pos, len, flags, pagep, get_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ sysv_write_failed(mapping, pos + len);
return ret;
}
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 62911637e12f..12817ffc7345 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2560,7 +2560,7 @@ static int power_cut_emulated(struct ubifs_info *c, int lnum, int write)
static int corrupt_data(const struct ubifs_info *c, const void *buf,
unsigned int len)
{
- unsigned int from, to, i, ffs = chance(1, 2);
+ unsigned int from, to, ffs = chance(1, 2);
unsigned char *p = (void *)buf;
from = random32() % (len + 1);
@@ -2571,11 +2571,9 @@ static int corrupt_data(const struct ubifs_info *c, const void *buf,
ffs ? "0xFFs" : "random data");
if (ffs)
- for (i = from; i < to; i++)
- p[i] = 0xFF;
+ memset(p + from, 0xFF, to - from);
else
- for (i = from; i < to; i++)
- p[i] = random32() % 0x100;
+ prandom_bytes(p + from, to - from);
return to;
}
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index e271fba1651b..8a574776a493 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -453,11 +453,11 @@ out:
}
/* If a directory is seeked, we have to free saved readdir() state */
-static loff_t ubifs_dir_llseek(struct file *file, loff_t offset, int origin)
+static loff_t ubifs_dir_llseek(struct file *file, loff_t offset, int whence)
{
kfree(file->private_data);
file->private_data = NULL;
- return generic_file_llseek(file, offset, origin);
+ return generic_file_llseek(file, offset, whence);
}
/* Free saved readdir() state when the directory is closed */
diff --git a/fs/ubifs/find.c b/fs/ubifs/find.c
index 28ec13af28d9..2dcf3d473fec 100644
--- a/fs/ubifs/find.c
+++ b/fs/ubifs/find.c
@@ -681,8 +681,16 @@ int ubifs_find_free_leb_for_idx(struct ubifs_info *c)
if (!lprops) {
lprops = ubifs_fast_find_freeable(c);
if (!lprops) {
- ubifs_assert(c->freeable_cnt == 0);
- if (c->lst.empty_lebs - c->lst.taken_empty_lebs > 0) {
+ /*
+ * The first condition means the following: go scan the
+ * LPT if there are uncategorized lprops, which means
+ * there may be freeable LEBs there (UBIFS does not
+ * store the information about freeable LEBs in the
+ * master node).
+ */
+ if (c->in_a_category_cnt != c->main_lebs ||
+ c->lst.empty_lebs - c->lst.taken_empty_lebs > 0) {
+ ubifs_assert(c->freeable_cnt == 0);
lprops = scan_for_leb_for_idx(c);
if (IS_ERR(lprops)) {
err = PTR_ERR(lprops);
diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
index e5a2a35a46dc..46190a7c42a6 100644
--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -300,8 +300,11 @@ void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
default:
ubifs_assert(0);
}
+
lprops->flags &= ~LPROPS_CAT_MASK;
lprops->flags |= cat;
+ c->in_a_category_cnt += 1;
+ ubifs_assert(c->in_a_category_cnt <= c->main_lebs);
}
/**
@@ -334,6 +337,9 @@ static void ubifs_remove_from_cat(struct ubifs_info *c,
default:
ubifs_assert(0);
}
+
+ c->in_a_category_cnt -= 1;
+ ubifs_assert(c->in_a_category_cnt >= 0);
}
/**
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 5486346d0a3f..d133c276fe05 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -1183,6 +1183,8 @@ struct ubifs_debug_info;
* @freeable_list: list of freeable non-index LEBs (free + dirty == @leb_size)
* @frdi_idx_list: list of freeable index LEBs (free + dirty == @leb_size)
* @freeable_cnt: number of freeable LEBs in @freeable_list
+ * @in_a_category_cnt: count of lprops which are in a certain category, which
+ * basically meants that they were loaded from the flash
*
* @ltab_lnum: LEB number of LPT's own lprops table
* @ltab_offs: offset of LPT's own lprops table
@@ -1412,6 +1414,7 @@ struct ubifs_info {
struct list_head freeable_list;
struct list_head frdi_idx_list;
int freeable_cnt;
+ int in_a_category_cnt;
int ltab_lnum;
int ltab_offs;
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index df88b957ccf0..cbae1ed0b7c1 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -587,7 +587,6 @@ out:
static sector_t inode_getblk(struct inode *inode, sector_t block,
int *err, int *new)
{
- static sector_t last_block;
struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
struct extent_position prev_epos, cur_epos, next_epos;
int count = 0, startnum = 0, endnum = 0;
@@ -601,6 +600,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
struct udf_inode_info *iinfo = UDF_I(inode);
int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
int lastblock = 0;
+ bool isBeyondEOF;
*err = 0;
*new = 0;
@@ -676,11 +676,10 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
return newblock;
}
- last_block = block;
/* Are we beyond EOF? */
if (etype == -1) {
int ret;
-
+ isBeyondEOF = 1;
if (count) {
if (c)
laarr[0] = laarr[1];
@@ -718,11 +717,11 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
memset(&laarr[c].extLocation, 0x00,
sizeof(struct kernel_lb_addr));
count++;
- endnum++;
}
endnum = c + 1;
lastblock = 1;
} else {
+ isBeyondEOF = 0;
endnum = startnum = ((count > 2) ? 2 : count);
/* if the current extent is in position 0,
@@ -765,10 +764,13 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
goal, err);
if (!newblocknum) {
brelse(prev_epos.bh);
+ brelse(cur_epos.bh);
+ brelse(next_epos.bh);
*err = -ENOSPC;
return 0;
}
- iinfo->i_lenExtents += inode->i_sb->s_blocksize;
+ if (isBeyondEOF)
+ iinfo->i_lenExtents += inode->i_sb->s_blocksize;
}
/* if the extent the requsted block is located in contains multiple
@@ -795,6 +797,8 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
brelse(prev_epos.bh);
+ brelse(cur_epos.bh);
+ brelse(next_epos.bh);
newblock = udf_get_pblock(inode->i_sb, newblocknum,
iinfo->i_location.partitionReferenceNum, 0);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index d44fb568abe1..e9be396a558d 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -307,7 +307,8 @@ static void udf_sb_free_partitions(struct super_block *sb)
{
struct udf_sb_info *sbi = UDF_SB(sb);
int i;
-
+ if (sbi->s_partmaps == NULL)
+ return;
for (i = 0; i < sbi->s_partitions; i++)
udf_free_partition(&sbi->s_partmaps[i]);
kfree(sbi->s_partmaps);
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index eb6d0b7dc879..ff24e4449ece 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -526,6 +526,14 @@ int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len)
return __block_write_begin(page, pos, len, ufs_getfrag_block);
}
+static void ufs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size)
+ truncate_pagecache(inode, to, inode->i_size);
+}
+
static int ufs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -534,11 +542,8 @@ static int ufs_write_begin(struct file *file, struct address_space *mapping,
ret = block_write_begin(mapping, pos, len, flags, pagep,
ufs_getfrag_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ ufs_write_failed(mapping, pos + len);
return ret;
}
diff --git a/fs/utimes.c b/fs/utimes.c
index bb0696a41735..f4fb7eca10e8 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -158,13 +158,17 @@ long do_utimes(int dfd, const char __user *filename, struct timespec *times,
if (!(flags & AT_SYMLINK_NOFOLLOW))
lookup_flags |= LOOKUP_FOLLOW;
-
+retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
error = utimes_common(&path, times);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
}
out:
diff --git a/fs/xattr.c b/fs/xattr.c
index e21c119f4f99..3377dff18404 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -370,8 +370,9 @@ SYSCALL_DEFINE5(setxattr, const char __user *, pathname,
{
struct path path;
int error;
-
- error = user_path(pathname, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = mnt_want_write(path.mnt);
@@ -380,6 +381,10 @@ SYSCALL_DEFINE5(setxattr, const char __user *, pathname,
mnt_drop_write(path.mnt);
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -389,8 +394,9 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
{
struct path path;
int error;
-
- error = user_lpath(pathname, &path);
+ unsigned int lookup_flags = 0;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = mnt_want_write(path.mnt);
@@ -399,6 +405,10 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
mnt_drop_write(path.mnt);
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -476,12 +486,17 @@ SYSCALL_DEFINE4(getxattr, const char __user *, pathname,
{
struct path path;
ssize_t error;
-
- error = user_path(pathname, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = getxattr(path.dentry, name, value, size);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -490,12 +505,17 @@ SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname,
{
struct path path;
ssize_t error;
-
- error = user_lpath(pathname, &path);
+ unsigned int lookup_flags = 0;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = getxattr(path.dentry, name, value, size);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -556,12 +576,17 @@ SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list,
{
struct path path;
ssize_t error;
-
- error = user_path(pathname, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = listxattr(path.dentry, list, size);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -570,12 +595,17 @@ SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
{
struct path path;
ssize_t error;
-
- error = user_lpath(pathname, &path);
+ unsigned int lookup_flags = 0;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = listxattr(path.dentry, list, size);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -615,8 +645,9 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
{
struct path path;
int error;
-
- error = user_path(pathname, &path);
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = mnt_want_write(path.mnt);
@@ -625,6 +656,10 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
mnt_drop_write(path.mnt);
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
@@ -633,8 +668,9 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
{
struct path path;
int error;
-
- error = user_lpath(pathname, &path);
+ unsigned int lookup_flags = 0;
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (error)
return error;
error = mnt_want_write(path.mnt);
@@ -643,6 +679,10 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
mnt_drop_write(path.mnt);
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index 6100ec0fa1d4..5a7ffe54f5d5 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -2,6 +2,7 @@ config XFS_FS
tristate "XFS filesystem support"
depends on BLOCK
select EXPORTFS
+ select LIBCRC32C
help
XFS is a high performance journaling filesystem which originated
on the SGI IRIX platform. It is completely multi-threaded, can
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index d2bf974b1a2f..d02201df855b 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -37,9 +37,8 @@ xfs-y += xfs_aops.o \
xfs_file.o \
xfs_filestream.o \
xfs_fsops.o \
- xfs_fs_subr.o \
xfs_globals.o \
- xfs_iget.o \
+ xfs_icache.o \
xfs_ioctl.o \
xfs_iomap.o \
xfs_iops.o \
@@ -47,7 +46,6 @@ xfs-y += xfs_aops.o \
xfs_message.o \
xfs_mru_cache.o \
xfs_super.o \
- xfs_sync.o \
xfs_xattr.o \
xfs_rename.o \
xfs_utils.o \
diff --git a/fs/xfs/uuid.h b/fs/xfs/uuid.h
index 4732d71262cc..104db0f3bed6 100644
--- a/fs/xfs/uuid.h
+++ b/fs/xfs/uuid.h
@@ -26,4 +26,10 @@ extern int uuid_is_nil(uuid_t *uuid);
extern int uuid_equal(uuid_t *uuid1, uuid_t *uuid2);
extern void uuid_getnodeuniq(uuid_t *uuid, int fsid [2]);
+static inline void
+uuid_copy(uuid_t *dst, uuid_t *src)
+{
+ memcpy(dst, src, sizeof(uuid_t));
+}
+
#endif /* __XFS_SUPPORT_UUID_H__ */
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 44d65c1533c0..f2aeedb6a579 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -108,6 +108,8 @@ typedef struct xfs_agf {
extern int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
+extern const struct xfs_buf_ops xfs_agf_buf_ops;
+
/*
* Size of the unlinked inode hash table in the agi.
*/
@@ -161,6 +163,8 @@ typedef struct xfs_agi {
extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_agnumber_t agno, struct xfs_buf **bpp);
+extern const struct xfs_buf_ops xfs_agi_buf_ops;
+
/*
* The third a.g. block contains the a.g. freelist, an array
* of block pointers to blocks owned by the allocation btree code.
@@ -233,6 +237,7 @@ typedef struct xfs_perag {
#define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup
in xfs_inode_ag_iterator */
#define XFS_ICI_RECLAIM_TAG 0 /* inode is to be reclaimed */
+#define XFS_ICI_EOFBLOCKS_TAG 1 /* inode has blocks beyond EOF */
#define XFS_AG_MAXLEVELS(mp) ((mp)->m_ag_maxlevels)
#define XFS_MIN_FREELIST_RAW(bl,cl,mp) \
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 4f33c32affe3..393055fe3aef 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -430,6 +430,60 @@ xfs_alloc_fixup_trees(
return 0;
}
+static void
+xfs_agfl_verify(
+ struct xfs_buf *bp)
+{
+#ifdef WHEN_CRCS_COME_ALONG
+ /*
+ * we cannot actually do any verification of the AGFL because mkfs does
+ * not initialise the AGFL to zero or NULL. Hence the only valid part of
+ * the AGFL is what the AGF says is active. We can't get to the AGF, so
+ * we can't verify just those entries are valid.
+ *
+ * This problem goes away when the CRC format change comes along as that
+ * requires the AGFL to be initialised by mkfs. At that point, we can
+ * verify the blocks in the agfl -active or not- lie within the bounds
+ * of the AG. Until then, just leave this check ifdef'd out.
+ */
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp);
+ int agfl_ok = 1;
+
+ int i;
+
+ for (i = 0; i < XFS_AGFL_SIZE(mp); i++) {
+ if (be32_to_cpu(agfl->agfl_bno[i]) == NULLAGBLOCK ||
+ be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks)
+ agfl_ok = 0;
+ }
+
+ if (!agfl_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agfl);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+#endif
+}
+
+static void
+xfs_agfl_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_agfl_verify(bp);
+}
+
+static void
+xfs_agfl_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_agfl_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_agfl_buf_ops = {
+ .verify_read = xfs_agfl_read_verify,
+ .verify_write = xfs_agfl_write_verify,
+};
+
/*
* Read in the allocation group free block array.
*/
@@ -447,7 +501,7 @@ xfs_alloc_read_agfl(
error = xfs_trans_read_buf(
mp, tp, mp->m_ddev_targp,
XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
- XFS_FSS_TO_BB(mp, 1), 0, &bp);
+ XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_agfl_buf_ops);
if (error)
return error;
ASSERT(!xfs_buf_geterror(bp));
@@ -1866,6 +1920,7 @@ xfs_alloc_fix_freelist(
/*
* Initialize the args structure.
*/
+ memset(&targs, 0, sizeof(targs));
targs.tp = tp;
targs.mp = mp;
targs.agbp = agbp;
@@ -2090,6 +2145,63 @@ xfs_alloc_put_freelist(
return 0;
}
+static void
+xfs_agf_verify(
+ struct xfs_buf *bp)
+ {
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_agf *agf;
+ int agf_ok;
+
+ agf = XFS_BUF_TO_AGF(bp);
+
+ agf_ok = agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
+ XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
+ be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
+ be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
+ be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
+ be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp);
+
+ /*
+ * during growfs operations, the perag is not fully initialised,
+ * so we can't use it for any useful checking. growfs ensures we can't
+ * use it by using uncached buffers that don't have the perag attached
+ * so we can detect and avoid this problem.
+ */
+ if (bp->b_pag)
+ agf_ok = agf_ok && be32_to_cpu(agf->agf_seqno) ==
+ bp->b_pag->pag_agno;
+
+ if (xfs_sb_version_haslazysbcount(&mp->m_sb))
+ agf_ok = agf_ok && be32_to_cpu(agf->agf_btreeblks) <=
+ be32_to_cpu(agf->agf_length);
+
+ if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF,
+ XFS_RANDOM_ALLOC_READ_AGF))) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agf);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_agf_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_agf_verify(bp);
+}
+
+static void
+xfs_agf_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_agf_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_agf_buf_ops = {
+ .verify_read = xfs_agf_read_verify,
+ .verify_write = xfs_agf_write_verify,
+};
+
/*
* Read in the allocation group header (free/alloc section).
*/
@@ -2101,44 +2213,19 @@ xfs_read_agf(
int flags, /* XFS_BUF_ */
struct xfs_buf **bpp) /* buffer for the ag freelist header */
{
- struct xfs_agf *agf; /* ag freelist header */
- int agf_ok; /* set if agf is consistent */
int error;
ASSERT(agno != NULLAGNUMBER);
error = xfs_trans_read_buf(
mp, tp, mp->m_ddev_targp,
XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
- XFS_FSS_TO_BB(mp, 1), flags, bpp);
+ XFS_FSS_TO_BB(mp, 1), flags, bpp, &xfs_agf_buf_ops);
if (error)
return error;
if (!*bpp)
return 0;
ASSERT(!(*bpp)->b_error);
- agf = XFS_BUF_TO_AGF(*bpp);
-
- /*
- * Validate the magic number of the agf block.
- */
- agf_ok =
- agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
- XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
- be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
- be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
- be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
- be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp) &&
- be32_to_cpu(agf->agf_seqno) == agno;
- if (xfs_sb_version_haslazysbcount(&mp->m_sb))
- agf_ok = agf_ok && be32_to_cpu(agf->agf_btreeblks) <=
- be32_to_cpu(agf->agf_length);
- if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF,
- XFS_RANDOM_ALLOC_READ_AGF))) {
- XFS_CORRUPTION_ERROR("xfs_alloc_read_agf",
- XFS_ERRLEVEL_LOW, mp, agf);
- xfs_trans_brelse(tp, *bpp);
- return XFS_ERROR(EFSCORRUPTED);
- }
xfs_buf_set_ref(*bpp, XFS_AGF_REF);
return 0;
}
@@ -2207,7 +2294,7 @@ xfs_alloc_read_agf(
* group or loop over the allocation groups to find the result.
*/
int /* error */
-__xfs_alloc_vextent(
+xfs_alloc_vextent(
xfs_alloc_arg_t *args) /* allocation argument structure */
{
xfs_agblock_t agsize; /* allocation group size */
@@ -2417,46 +2504,6 @@ error0:
return error;
}
-static void
-xfs_alloc_vextent_worker(
- struct work_struct *work)
-{
- struct xfs_alloc_arg *args = container_of(work,
- struct xfs_alloc_arg, work);
- unsigned long pflags;
-
- /* we are in a transaction context here */
- current_set_flags_nested(&pflags, PF_FSTRANS);
-
- args->result = __xfs_alloc_vextent(args);
- complete(args->done);
-
- current_restore_flags_nested(&pflags, PF_FSTRANS);
-}
-
-/*
- * Data allocation requests often come in with little stack to work on. Push
- * them off to a worker thread so there is lots of stack to use. Metadata
- * requests, OTOH, are generally from low stack usage paths, so avoid the
- * context switch overhead here.
- */
-int
-xfs_alloc_vextent(
- struct xfs_alloc_arg *args)
-{
- DECLARE_COMPLETION_ONSTACK(done);
-
- if (!args->userdata)
- return __xfs_alloc_vextent(args);
-
-
- args->done = &done;
- INIT_WORK_ONSTACK(&args->work, xfs_alloc_vextent_worker);
- queue_work(xfs_alloc_wq, &args->work);
- wait_for_completion(&done);
- return args->result;
-}
-
/*
* Free an extent.
* Just break up the extent address and hand off to xfs_free_ag_extent
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h
index 93be4a667ca1..99d0a6101558 100644
--- a/fs/xfs/xfs_alloc.h
+++ b/fs/xfs/xfs_alloc.h
@@ -120,9 +120,6 @@ typedef struct xfs_alloc_arg {
char isfl; /* set if is freelist blocks - !acctg */
char userdata; /* set if this is user data */
xfs_fsblock_t firstblock; /* io first block allocated */
- struct completion *done;
- struct work_struct work;
- int result;
} xfs_alloc_arg_t;
/*
@@ -234,4 +231,7 @@ xfs_alloc_get_rec(
xfs_extlen_t *len, /* output: length of extent */
int *stat); /* output: success/failure */
+extern const struct xfs_buf_ops xfs_agf_buf_ops;
+extern const struct xfs_buf_ops xfs_agfl_buf_ops;
+
#endif /* __XFS_ALLOC_H__ */
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index f1647caace8f..b1ddef6b2689 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -121,6 +121,8 @@ xfs_allocbt_free_block(
xfs_extent_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1,
XFS_EXTENT_BUSY_SKIP_DISCARD);
xfs_trans_agbtree_delta(cur->bc_tp, -1);
+
+ xfs_trans_binval(cur->bc_tp, bp);
return 0;
}
@@ -270,6 +272,82 @@ xfs_allocbt_key_diff(
return (__int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock;
}
+static void
+xfs_allocbt_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
+ struct xfs_perag *pag = bp->b_pag;
+ unsigned int level;
+ int sblock_ok; /* block passes checks */
+
+ /*
+ * magic number and level verification
+ *
+ * During growfs operations, we can't verify the exact level as the
+ * perag is not fully initialised and hence not attached to the buffer.
+ * In this case, check against the maximum tree depth.
+ */
+ level = be16_to_cpu(block->bb_level);
+ switch (block->bb_magic) {
+ case cpu_to_be32(XFS_ABTB_MAGIC):
+ if (pag)
+ sblock_ok = level < pag->pagf_levels[XFS_BTNUM_BNOi];
+ else
+ sblock_ok = level < mp->m_ag_maxlevels;
+ break;
+ case cpu_to_be32(XFS_ABTC_MAGIC):
+ if (pag)
+ sblock_ok = level < pag->pagf_levels[XFS_BTNUM_CNTi];
+ else
+ sblock_ok = level < mp->m_ag_maxlevels;
+ break;
+ default:
+ sblock_ok = 0;
+ break;
+ }
+
+ /* numrecs verification */
+ sblock_ok = sblock_ok &&
+ be16_to_cpu(block->bb_numrecs) <= mp->m_alloc_mxr[level != 0];
+
+ /* sibling pointer verification */
+ sblock_ok = sblock_ok &&
+ (block->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK) ||
+ be32_to_cpu(block->bb_u.s.bb_leftsib) < mp->m_sb.sb_agblocks) &&
+ block->bb_u.s.bb_leftsib &&
+ (block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK) ||
+ be32_to_cpu(block->bb_u.s.bb_rightsib) < mp->m_sb.sb_agblocks) &&
+ block->bb_u.s.bb_rightsib;
+
+ if (!sblock_ok) {
+ trace_xfs_btree_corrupt(bp, _RET_IP_);
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, block);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_allocbt_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_allocbt_verify(bp);
+}
+
+static void
+xfs_allocbt_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_allocbt_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_allocbt_buf_ops = {
+ .verify_read = xfs_allocbt_read_verify,
+ .verify_write = xfs_allocbt_write_verify,
+};
+
+
#ifdef DEBUG
STATIC int
xfs_allocbt_keys_inorder(
@@ -325,6 +403,7 @@ static const struct xfs_btree_ops xfs_allocbt_ops = {
.init_rec_from_cur = xfs_allocbt_init_rec_from_cur,
.init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur,
.key_diff = xfs_allocbt_key_diff,
+ .buf_ops = &xfs_allocbt_buf_ops,
#ifdef DEBUG
.keys_inorder = xfs_allocbt_keys_inorder,
.recs_inorder = xfs_allocbt_recs_inorder,
diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h
index 359fb86ed876..7e89a2b429dd 100644
--- a/fs/xfs/xfs_alloc_btree.h
+++ b/fs/xfs/xfs_alloc_btree.h
@@ -93,4 +93,6 @@ extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,
xfs_agnumber_t, xfs_btnum_t);
extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
+extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
+
#endif /* __XFS_ALLOC_BTREE_H__ */
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index e562dd43f41f..4111a40ebe1a 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -124,7 +124,7 @@ xfs_setfilesize_trans_alloc(
ioend->io_append_trans = tp;
/*
- * We will pass freeze protection with a transaction. So tell lockdep
+ * We may pass freeze protection with a transaction. So tell lockdep
* we released it.
*/
rwsem_release(&ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
@@ -149,11 +149,13 @@ xfs_setfilesize(
xfs_fsize_t isize;
/*
- * The transaction was allocated in the I/O submission thread,
- * thus we need to mark ourselves as beeing in a transaction
- * manually.
+ * The transaction may have been allocated in the I/O submission thread,
+ * thus we need to mark ourselves as beeing in a transaction manually.
+ * Similarly for freeze protection.
*/
current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
+ rwsem_acquire_read(&VFS_I(ip)->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
+ 0, 1, _THIS_IP_);
xfs_ilock(ip, XFS_ILOCK_EXCL);
isize = xfs_new_eof(ip, ioend->io_offset + ioend->io_size);
@@ -187,7 +189,8 @@ xfs_finish_ioend(
if (ioend->io_type == XFS_IO_UNWRITTEN)
queue_work(mp->m_unwritten_workqueue, &ioend->io_work);
- else if (ioend->io_append_trans)
+ else if (ioend->io_append_trans ||
+ (ioend->io_isdirect && xfs_ioend_is_append(ioend)))
queue_work(mp->m_data_workqueue, &ioend->io_work);
else
xfs_destroy_ioend(ioend);
@@ -205,15 +208,6 @@ xfs_end_io(
struct xfs_inode *ip = XFS_I(ioend->io_inode);
int error = 0;
- if (ioend->io_append_trans) {
- /*
- * We've got freeze protection passed with the transaction.
- * Tell lockdep about it.
- */
- rwsem_acquire_read(
- &ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
- 0, 1, _THIS_IP_);
- }
if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
ioend->io_error = -EIO;
goto done;
@@ -226,35 +220,31 @@ xfs_end_io(
* range to normal written extens after the data I/O has finished.
*/
if (ioend->io_type == XFS_IO_UNWRITTEN) {
+ error = xfs_iomap_write_unwritten(ip, ioend->io_offset,
+ ioend->io_size);
+ } else if (ioend->io_isdirect && xfs_ioend_is_append(ioend)) {
/*
- * For buffered I/O we never preallocate a transaction when
- * doing the unwritten extent conversion, but for direct I/O
- * we do not know if we are converting an unwritten extent
- * or not at the point where we preallocate the transaction.
+ * For direct I/O we do not know if we need to allocate blocks
+ * or not so we can't preallocate an append transaction as that
+ * results in nested reservations and log space deadlocks. Hence
+ * allocate the transaction here. While this is sub-optimal and
+ * can block IO completion for some time, we're stuck with doing
+ * it this way until we can pass the ioend to the direct IO
+ * allocation callbacks and avoid nesting that way.
*/
- if (ioend->io_append_trans) {
- ASSERT(ioend->io_isdirect);
-
- current_set_flags_nested(
- &ioend->io_append_trans->t_pflags, PF_FSTRANS);
- xfs_trans_cancel(ioend->io_append_trans, 0);
- }
-
- error = xfs_iomap_write_unwritten(ip, ioend->io_offset,
- ioend->io_size);
- if (error) {
- ioend->io_error = -error;
+ error = xfs_setfilesize_trans_alloc(ioend);
+ if (error)
goto done;
- }
+ error = xfs_setfilesize(ioend);
} else if (ioend->io_append_trans) {
error = xfs_setfilesize(ioend);
- if (error)
- ioend->io_error = -error;
} else {
ASSERT(!xfs_ioend_is_append(ioend));
}
done:
+ if (error)
+ ioend->io_error = -error;
xfs_destroy_ioend(ioend);
}
@@ -481,11 +471,17 @@ static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh)
*
* The fix is two passes across the ioend list - one to start writeback on the
* buffer_heads, and then submit them for I/O on the second pass.
+ *
+ * If @fail is non-zero, it means that we have a situation where some part of
+ * the submission process has failed after we have marked paged for writeback
+ * and unlocked them. In this situation, we need to fail the ioend chain rather
+ * than submit it to IO. This typically only happens on a filesystem shutdown.
*/
STATIC void
xfs_submit_ioend(
struct writeback_control *wbc,
- xfs_ioend_t *ioend)
+ xfs_ioend_t *ioend,
+ int fail)
{
xfs_ioend_t *head = ioend;
xfs_ioend_t *next;
@@ -506,6 +502,18 @@ xfs_submit_ioend(
next = ioend->io_list;
bio = NULL;
+ /*
+ * If we are failing the IO now, just mark the ioend with an
+ * error and finish it. This will run IO completion immediately
+ * as there is only one reference to the ioend at this point in
+ * time.
+ */
+ if (fail) {
+ ioend->io_error = -fail;
+ xfs_finish_ioend(ioend);
+ continue;
+ }
+
for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) {
if (!bio) {
@@ -1060,7 +1068,18 @@ xfs_vm_writepage(
xfs_start_page_writeback(page, 1, count);
- if (ioend && imap_valid) {
+ /* if there is no IO to be submitted for this page, we are done */
+ if (!ioend)
+ return 0;
+
+ ASSERT(iohead);
+
+ /*
+ * Any errors from this point onwards need tobe reported through the IO
+ * completion path as we have marked the initial page as under writeback
+ * and unlocked it.
+ */
+ if (imap_valid) {
xfs_off_t end_index;
end_index = imap.br_startoff + imap.br_blockcount;
@@ -1079,20 +1098,15 @@ xfs_vm_writepage(
wbc, end_index);
}
- if (iohead) {
- /*
- * Reserve log space if we might write beyond the on-disk
- * inode size.
- */
- if (ioend->io_type != XFS_IO_UNWRITTEN &&
- xfs_ioend_is_append(ioend)) {
- err = xfs_setfilesize_trans_alloc(ioend);
- if (err)
- goto error;
- }
- xfs_submit_ioend(wbc, iohead);
- }
+ /*
+ * Reserve log space if we might write beyond the on-disk inode size.
+ */
+ err = 0;
+ if (ioend->io_type != XFS_IO_UNWRITTEN && xfs_ioend_is_append(ioend))
+ err = xfs_setfilesize_trans_alloc(ioend);
+
+ xfs_submit_ioend(wbc, iohead, err);
return 0;
@@ -1408,25 +1422,21 @@ xfs_vm_direct_IO(
size_t size = iov_length(iov, nr_segs);
/*
- * We need to preallocate a transaction for a size update
- * here. In the case that this write both updates the size
- * and converts at least on unwritten extent we will cancel
- * the still clean transaction after the I/O has finished.
+ * We cannot preallocate a size update transaction here as we
+ * don't know whether allocation is necessary or not. Hence we
+ * can only tell IO completion that one is necessary if we are
+ * not doing unwritten extent conversion.
*/
iocb->private = ioend = xfs_alloc_ioend(inode, XFS_IO_DIRECT);
- if (offset + size > XFS_I(inode)->i_d.di_size) {
- ret = xfs_setfilesize_trans_alloc(ioend);
- if (ret)
- goto out_destroy_ioend;
+ if (offset + size > XFS_I(inode)->i_d.di_size)
ioend->io_isdirect = 1;
- }
ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov,
offset, nr_segs,
xfs_get_blocks_direct,
xfs_end_io_direct_write, NULL, 0);
if (ret != -EIOCBQUEUED && iocb->private)
- goto out_trans_cancel;
+ goto out_destroy_ioend;
} else {
ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov,
offset, nr_segs,
@@ -1436,15 +1446,6 @@ xfs_vm_direct_IO(
return ret;
-out_trans_cancel:
- if (ioend->io_append_trans) {
- current_set_flags_nested(&ioend->io_append_trans->t_pflags,
- PF_FSTRANS);
- rwsem_acquire_read(
- &inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1],
- 0, 1, _THIS_IP_);
- xfs_trans_cancel(ioend->io_append_trans, 0);
- }
out_destroy_ioend:
xfs_destroy_ioend(ioend);
return ret;
@@ -1617,7 +1618,7 @@ xfs_vm_bmap(
trace_xfs_vm_bmap(XFS_I(inode));
xfs_ilock(ip, XFS_IOLOCK_SHARED);
- xfs_flush_pages(ip, (xfs_off_t)0, -1, 0, FI_REMAPF);
+ filemap_write_and_wait(mapping);
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
return generic_block_bmap(mapping, block, xfs_get_blocks);
}
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 0ca1f0be62d2..aaf472532b3c 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -903,11 +903,9 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
*/
dp = args->dp;
args->blkno = 0;
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
- XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
if (error)
- return(error);
- ASSERT(bp != NULL);
+ return error;
/*
* Look up the given attribute in the leaf block. Figure out if
@@ -1031,12 +1029,12 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
* Read in the block containing the "old" attr, then
* remove the "old" attr from that block (neat, huh!)
*/
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1,
- &bp, XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno,
+ -1, &bp);
if (error)
- return(error);
- ASSERT(bp != NULL);
- (void)xfs_attr_leaf_remove(bp, args);
+ return error;
+
+ xfs_attr_leaf_remove(bp, args);
/*
* If the result is small enough, shrink it all into the inode.
@@ -1100,20 +1098,17 @@ xfs_attr_leaf_removename(xfs_da_args_t *args)
*/
dp = args->dp;
args->blkno = 0;
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
- XFS_ATTR_FORK);
- if (error) {
- return(error);
- }
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
+ if (error)
+ return error;
- ASSERT(bp != NULL);
error = xfs_attr_leaf_lookup_int(bp, args);
if (error == ENOATTR) {
xfs_trans_brelse(args->trans, bp);
return(error);
}
- (void)xfs_attr_leaf_remove(bp, args);
+ xfs_attr_leaf_remove(bp, args);
/*
* If the result is small enough, shrink it all into the inode.
@@ -1155,12 +1150,12 @@ xfs_attr_leaf_get(xfs_da_args_t *args)
struct xfs_buf *bp;
int error;
+ trace_xfs_attr_leaf_get(args);
+
args->blkno = 0;
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
- XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
if (error)
- return(error);
- ASSERT(bp != NULL);
+ return error;
error = xfs_attr_leaf_lookup_int(bp, args);
if (error != EEXIST) {
@@ -1181,22 +1176,15 @@ xfs_attr_leaf_get(xfs_da_args_t *args)
STATIC int
xfs_attr_leaf_list(xfs_attr_list_context_t *context)
{
- xfs_attr_leafblock_t *leaf;
int error;
struct xfs_buf *bp;
+ trace_xfs_attr_leaf_list(context);
+
context->cursor->blkno = 0;
- error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(NULL, context->dp, 0, -1, &bp);
if (error)
return XFS_ERROR(error);
- ASSERT(bp != NULL);
- leaf = bp->b_addr;
- if (unlikely(leaf->hdr.info.magic != cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) {
- XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW,
- context->dp->i_mount, leaf);
- xfs_trans_brelse(NULL, bp);
- return XFS_ERROR(EFSCORRUPTED);
- }
error = xfs_attr_leaf_list_int(bp, context);
xfs_trans_brelse(NULL, bp);
@@ -1600,12 +1588,9 @@ xfs_attr_node_removename(xfs_da_args_t *args)
ASSERT(state->path.blk[0].bp);
state->path.blk[0].bp = NULL;
- error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
- XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(args->trans, args->dp, 0, -1, &bp);
if (error)
goto out;
- ASSERT((((xfs_attr_leafblock_t *)bp->b_addr)->hdr.info.magic) ==
- cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
xfs_bmap_init(args->flist, args->firstblock);
@@ -1653,6 +1638,8 @@ xfs_attr_fillstate(xfs_da_state_t *state)
xfs_da_state_blk_t *blk;
int level;
+ trace_xfs_attr_fillstate(state->args);
+
/*
* Roll down the "path" in the state structure, storing the on-disk
* block number for those buffers in the "path".
@@ -1699,6 +1686,8 @@ xfs_attr_refillstate(xfs_da_state_t *state)
xfs_da_state_blk_t *blk;
int level, error;
+ trace_xfs_attr_refillstate(state->args);
+
/*
* Roll down the "path" in the state structure, storing the on-disk
* block number for those buffers in the "path".
@@ -1707,7 +1696,7 @@ xfs_attr_refillstate(xfs_da_state_t *state)
ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
if (blk->disk_blkno) {
- error = xfs_da_read_buf(state->args->trans,
+ error = xfs_da_node_read(state->args->trans,
state->args->dp,
blk->blkno, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK);
@@ -1726,7 +1715,7 @@ xfs_attr_refillstate(xfs_da_state_t *state)
ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
if (blk->disk_blkno) {
- error = xfs_da_read_buf(state->args->trans,
+ error = xfs_da_node_read(state->args->trans,
state->args->dp,
blk->blkno, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK);
@@ -1755,6 +1744,8 @@ xfs_attr_node_get(xfs_da_args_t *args)
int error, retval;
int i;
+ trace_xfs_attr_node_get(args);
+
state = xfs_da_state_alloc();
state->args = args;
state->mp = args->dp->i_mount;
@@ -1804,6 +1795,8 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
int error, i;
struct xfs_buf *bp;
+ trace_xfs_attr_node_list(context);
+
cursor = context->cursor;
cursor->initted = 1;
@@ -1814,7 +1807,7 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
*/
bp = NULL;
if (cursor->blkno > 0) {
- error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
+ error = xfs_da_node_read(NULL, context->dp, cursor->blkno, -1,
&bp, XFS_ATTR_FORK);
if ((error != 0) && (error != EFSCORRUPTED))
return(error);
@@ -1856,17 +1849,11 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
if (bp == NULL) {
cursor->blkno = 0;
for (;;) {
- error = xfs_da_read_buf(NULL, context->dp,
+ error = xfs_da_node_read(NULL, context->dp,
cursor->blkno, -1, &bp,
XFS_ATTR_FORK);
if (error)
return(error);
- if (unlikely(bp == NULL)) {
- XFS_ERROR_REPORT("xfs_attr_node_list(2)",
- XFS_ERRLEVEL_LOW,
- context->dp->i_mount);
- return(XFS_ERROR(EFSCORRUPTED));
- }
node = bp->b_addr;
if (node->hdr.info.magic ==
cpu_to_be16(XFS_ATTR_LEAF_MAGIC))
@@ -1907,14 +1894,6 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
*/
for (;;) {
leaf = bp->b_addr;
- if (unlikely(leaf->hdr.info.magic !=
- cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) {
- XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)",
- XFS_ERRLEVEL_LOW,
- context->dp->i_mount, leaf);
- xfs_trans_brelse(NULL, bp);
- return(XFS_ERROR(EFSCORRUPTED));
- }
error = xfs_attr_leaf_list_int(bp, context);
if (error) {
xfs_trans_brelse(NULL, bp);
@@ -1924,16 +1903,10 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
break;
cursor->blkno = be32_to_cpu(leaf->hdr.info.forw);
xfs_trans_brelse(NULL, bp);
- error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
- &bp, XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(NULL, context->dp, cursor->blkno, -1,
+ &bp);
if (error)
- return(error);
- if (unlikely((bp == NULL))) {
- XFS_ERROR_REPORT("xfs_attr_node_list(5)",
- XFS_ERRLEVEL_LOW,
- context->dp->i_mount);
- return(XFS_ERROR(EFSCORRUPTED));
- }
+ return error;
}
xfs_trans_brelse(NULL, bp);
return(0);
@@ -1959,6 +1932,8 @@ xfs_attr_rmtval_get(xfs_da_args_t *args)
int nmap, error, tmp, valuelen, blkcnt, i;
xfs_dablk_t lblkno;
+ trace_xfs_attr_rmtval_get(args);
+
ASSERT(!(args->flags & ATTR_KERNOVAL));
mp = args->dp->i_mount;
@@ -1980,7 +1955,7 @@ xfs_attr_rmtval_get(xfs_da_args_t *args)
dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock);
blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
- dblkno, blkcnt, 0, &bp);
+ dblkno, blkcnt, 0, &bp, NULL);
if (error)
return(error);
@@ -2014,6 +1989,8 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
xfs_dablk_t lblkno;
int blkcnt, valuelen, nmap, error, tmp, committed;
+ trace_xfs_attr_rmtval_set(args);
+
dp = args->dp;
mp = dp->i_mount;
src = args->value;
@@ -2143,6 +2120,8 @@ xfs_attr_rmtval_remove(xfs_da_args_t *args)
xfs_dablk_t lblkno;
int valuelen, blkcnt, nmap, error, done, committed;
+ trace_xfs_attr_rmtval_remove(args);
+
mp = args->dp->i_mount;
/*
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index d330111ca738..ee24993c7d12 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -57,7 +57,8 @@ STATIC int xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t which_block,
struct xfs_buf **bpp);
STATIC int xfs_attr_leaf_add_work(struct xfs_buf *leaf_buffer,
xfs_da_args_t *args, int freemap_index);
-STATIC void xfs_attr_leaf_compact(xfs_trans_t *tp, struct xfs_buf *leaf_buffer);
+STATIC void xfs_attr_leaf_compact(struct xfs_da_args *args,
+ struct xfs_buf *leaf_buffer);
STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state,
xfs_da_state_blk_t *blk1,
xfs_da_state_blk_t *blk2);
@@ -87,6 +88,52 @@ STATIC void xfs_attr_leaf_moveents(xfs_attr_leafblock_t *src_leaf,
xfs_mount_t *mp);
STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index);
+static void
+xfs_attr_leaf_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_attr_leaf_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC);
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_attr_leaf_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_attr_leaf_verify(bp);
+}
+
+static void
+xfs_attr_leaf_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_attr_leaf_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_attr_leaf_buf_ops = {
+ .verify_read = xfs_attr_leaf_read_verify,
+ .verify_write = xfs_attr_leaf_write_verify,
+};
+
+int
+xfs_attr_leaf_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t bno,
+ xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp)
+{
+ return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
+ XFS_ATTR_FORK, &xfs_attr_leaf_buf_ops);
+}
+
/*========================================================================
* Namespace helper routines
*========================================================================*/
@@ -869,17 +916,16 @@ xfs_attr_leaf_to_node(xfs_da_args_t *args)
error = xfs_da_grow_inode(args, &blkno);
if (error)
goto out;
- error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp1,
- XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(args->trans, args->dp, 0, -1, &bp1);
if (error)
goto out;
- ASSERT(bp1 != NULL);
+
bp2 = NULL;
error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp2,
XFS_ATTR_FORK);
if (error)
goto out;
- ASSERT(bp2 != NULL);
+ bp2->b_ops = bp1->b_ops;
memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(dp->i_mount));
bp1 = NULL;
xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1);
@@ -933,7 +979,7 @@ xfs_attr_leaf_create(
XFS_ATTR_FORK);
if (error)
return(error);
- ASSERT(bp != NULL);
+ bp->b_ops = &xfs_attr_leaf_buf_ops;
leaf = bp->b_addr;
memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount));
hdr = &leaf->hdr;
@@ -1071,7 +1117,7 @@ xfs_attr_leaf_add(
* Compact the entries to coalesce free space.
* This may change the hdr->count via dropping INCOMPLETE entries.
*/
- xfs_attr_leaf_compact(args->trans, bp);
+ xfs_attr_leaf_compact(args, bp);
/*
* After compaction, the block is guaranteed to have only one
@@ -1102,6 +1148,8 @@ xfs_attr_leaf_add_work(
xfs_mount_t *mp;
int tmp, i;
+ trace_xfs_attr_leaf_add_work(args);
+
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
hdr = &leaf->hdr;
@@ -1214,15 +1262,17 @@ xfs_attr_leaf_add_work(
*/
STATIC void
xfs_attr_leaf_compact(
- struct xfs_trans *trans,
- struct xfs_buf *bp)
+ struct xfs_da_args *args,
+ struct xfs_buf *bp)
{
- xfs_attr_leafblock_t *leaf_s, *leaf_d;
- xfs_attr_leaf_hdr_t *hdr_s, *hdr_d;
- xfs_mount_t *mp;
- char *tmpbuffer;
+ xfs_attr_leafblock_t *leaf_s, *leaf_d;
+ xfs_attr_leaf_hdr_t *hdr_s, *hdr_d;
+ struct xfs_trans *trans = args->trans;
+ struct xfs_mount *mp = trans->t_mountp;
+ char *tmpbuffer;
+
+ trace_xfs_attr_leaf_compact(args);
- mp = trans->t_mountp;
tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP);
ASSERT(tmpbuffer != NULL);
memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(mp));
@@ -1291,6 +1341,7 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
leaf2 = blk2->bp->b_addr;
ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
+ ASSERT(leaf2->hdr.count == 0);
args = state->args;
trace_xfs_attr_leaf_rebalance(args);
@@ -1344,9 +1395,8 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
max = be16_to_cpu(hdr2->firstused)
- sizeof(xfs_attr_leaf_hdr_t);
max -= be16_to_cpu(hdr2->count) * sizeof(xfs_attr_leaf_entry_t);
- if (space > max) {
- xfs_attr_leaf_compact(args->trans, blk2->bp);
- }
+ if (space > max)
+ xfs_attr_leaf_compact(args, blk2->bp);
/*
* Move high entries from leaf1 to low end of leaf2.
@@ -1361,6 +1411,7 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
* I assert that since all callers pass in an empty
* second buffer, this code should never execute.
*/
+ ASSERT(0);
/*
* Figure the total bytes to be added to the destination leaf.
@@ -1376,9 +1427,8 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
max = be16_to_cpu(hdr1->firstused)
- sizeof(xfs_attr_leaf_hdr_t);
max -= be16_to_cpu(hdr1->count) * sizeof(xfs_attr_leaf_entry_t);
- if (space > max) {
- xfs_attr_leaf_compact(args->trans, blk1->bp);
- }
+ if (space > max)
+ xfs_attr_leaf_compact(args, blk1->bp);
/*
* Move low entries from leaf2 to high end of leaf1.
@@ -1422,10 +1472,24 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
args->index2 = 0;
args->blkno2 = blk2->blkno;
} else {
+ /*
+ * On a double leaf split, the original attr location
+ * is already stored in blkno2/index2, so don't
+ * overwrite it overwise we corrupt the tree.
+ */
blk2->index = blk1->index
- be16_to_cpu(leaf1->hdr.count);
- args->index = args->index2 = blk2->index;
- args->blkno = args->blkno2 = blk2->blkno;
+ args->index = blk2->index;
+ args->blkno = blk2->blkno;
+ if (!state->extravalid) {
+ /*
+ * set the new attr location to match the old
+ * one and let the higher level split code
+ * decide where in the leaf to place it.
+ */
+ args->index2 = blk2->index;
+ args->blkno2 = blk2->blkno;
+ }
}
} else {
ASSERT(state->inleaf == 1);
@@ -1561,6 +1625,8 @@ xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action)
xfs_dablk_t blkno;
struct xfs_buf *bp;
+ trace_xfs_attr_leaf_toosmall(state->args);
+
/*
* Check for the degenerate case of the block being over 50% full.
* If so, it's not worth even looking to see if we might be able
@@ -1620,18 +1686,16 @@ xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action)
blkno = be32_to_cpu(info->back);
if (blkno == 0)
continue;
- error = xfs_da_read_buf(state->args->trans, state->args->dp,
- blkno, -1, &bp, XFS_ATTR_FORK);
+ error = xfs_attr_leaf_read(state->args->trans, state->args->dp,
+ blkno, -1, &bp);
if (error)
return(error);
- ASSERT(bp != NULL);
leaf = (xfs_attr_leafblock_t *)info;
count = be16_to_cpu(leaf->hdr.count);
bytes = state->blocksize - (state->blocksize>>2);
bytes -= be16_to_cpu(leaf->hdr.usedbytes);
leaf = bp->b_addr;
- ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
count += be16_to_cpu(leaf->hdr.count);
bytes -= be16_to_cpu(leaf->hdr.usedbytes);
bytes -= count * sizeof(xfs_attr_leaf_entry_t);
@@ -1686,6 +1750,8 @@ xfs_attr_leaf_remove(
int tablesize, tmp, i;
xfs_mount_t *mp;
+ trace_xfs_attr_leaf_remove(args);
+
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
hdr = &leaf->hdr;
@@ -2495,15 +2561,11 @@ xfs_attr_leaf_clearflag(xfs_da_args_t *args)
/*
* Set up the operation.
*/
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
- XFS_ATTR_FORK);
- if (error) {
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
+ if (error)
return(error);
- }
- ASSERT(bp != NULL);
leaf = bp->b_addr;
- ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index < be16_to_cpu(leaf->hdr.count));
ASSERT(args->index >= 0);
entry = &leaf->entries[ args->index ];
@@ -2560,15 +2622,11 @@ xfs_attr_leaf_setflag(xfs_da_args_t *args)
/*
* Set up the operation.
*/
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
- XFS_ATTR_FORK);
- if (error) {
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp);
+ if (error)
return(error);
- }
- ASSERT(bp != NULL);
leaf = bp->b_addr;
- ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index < be16_to_cpu(leaf->hdr.count));
ASSERT(args->index >= 0);
entry = &leaf->entries[ args->index ];
@@ -2617,35 +2675,28 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args)
/*
* Read the block containing the "old" attr
*/
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp1,
- XFS_ATTR_FORK);
- if (error) {
- return(error);
- }
- ASSERT(bp1 != NULL);
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp1);
+ if (error)
+ return error;
/*
* Read the block containing the "new" attr, if it is different
*/
if (args->blkno2 != args->blkno) {
- error = xfs_da_read_buf(args->trans, args->dp, args->blkno2,
- -1, &bp2, XFS_ATTR_FORK);
- if (error) {
- return(error);
- }
- ASSERT(bp2 != NULL);
+ error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno2,
+ -1, &bp2);
+ if (error)
+ return error;
} else {
bp2 = bp1;
}
leaf1 = bp1->b_addr;
- ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index < be16_to_cpu(leaf1->hdr.count));
ASSERT(args->index >= 0);
entry1 = &leaf1->entries[ args->index ];
leaf2 = bp2->b_addr;
- ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
ASSERT(args->index2 < be16_to_cpu(leaf2->hdr.count));
ASSERT(args->index2 >= 0);
entry2 = &leaf2->entries[ args->index2 ];
@@ -2730,7 +2781,7 @@ xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp)
* the extents in reverse order the extent containing
* block 0 must still be there.
*/
- error = xfs_da_read_buf(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
+ error = xfs_da_node_read(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
if (error)
return(error);
blkno = XFS_BUF_ADDR(bp);
@@ -2815,7 +2866,7 @@ xfs_attr_node_inactive(
* traversal of the tree so we may deal with many blocks
* before we come back to this one.
*/
- error = xfs_da_read_buf(*trans, dp, child_fsb, -2, &child_bp,
+ error = xfs_da_node_read(*trans, dp, child_fsb, -2, &child_bp,
XFS_ATTR_FORK);
if (error)
return(error);
@@ -2856,8 +2907,8 @@ xfs_attr_node_inactive(
* child block number.
*/
if ((i+1) < count) {
- error = xfs_da_read_buf(*trans, dp, 0, parent_blkno,
- &bp, XFS_ATTR_FORK);
+ error = xfs_da_node_read(*trans, dp, 0, parent_blkno,
+ &bp, XFS_ATTR_FORK);
if (error)
return(error);
child_fsb = be32_to_cpu(node->btree[i+1].before);
diff --git a/fs/xfs/xfs_attr_leaf.h b/fs/xfs/xfs_attr_leaf.h
index dea17722945e..77de139a58f0 100644
--- a/fs/xfs/xfs_attr_leaf.h
+++ b/fs/xfs/xfs_attr_leaf.h
@@ -261,4 +261,10 @@ int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
struct xfs_buf *leaf2_bp);
int xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize,
int *local);
+int xfs_attr_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
+ xfs_dablk_t bno, xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp);
+
+extern const struct xfs_buf_ops xfs_attr_leaf_buf_ops;
+
#endif /* __XFS_ATTR_LEAF_H__ */
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 848ffa77707b..0e92d12765d2 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -2437,6 +2437,7 @@ xfs_bmap_btalloc(
* Normal allocation, done through xfs_alloc_vextent.
*/
tryagain = isaligned = 0;
+ memset(&args, 0, sizeof(args));
args.tp = ap->tp;
args.mp = mp;
args.fsbno = ap->blkno;
@@ -2661,8 +2662,9 @@ xfs_bmap_btree_to_extents(
if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
return error;
#endif
- if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
- XFS_BMAP_BTREE_REF)))
+ error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF,
+ &xfs_bmbt_buf_ops);
+ if (error)
return error;
cblock = XFS_BUF_TO_BLOCK(cbp);
if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
@@ -3082,6 +3084,7 @@ xfs_bmap_extents_to_btree(
* Convert to a btree with two levels, one record in root.
*/
XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
+ memset(&args, 0, sizeof(args));
args.tp = tp;
args.mp = mp;
args.firstblock = *firstblock;
@@ -3121,6 +3124,7 @@ xfs_bmap_extents_to_btree(
/*
* Fill in the child block.
*/
+ abp->b_ops = &xfs_bmbt_buf_ops;
ablock = XFS_BUF_TO_BLOCK(abp);
ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
ablock->bb_level = 0;
@@ -3237,6 +3241,7 @@ xfs_bmap_local_to_extents(
xfs_buf_t *bp; /* buffer for extent block */
xfs_bmbt_rec_host_t *ep;/* extent record pointer */
+ memset(&args, 0, sizeof(args));
args.tp = tp;
args.mp = ip->i_mount;
args.firstblock = *firstblock;
@@ -3266,6 +3271,7 @@ xfs_bmap_local_to_extents(
ASSERT(args.len == 1);
*firstblock = args.fsbno;
bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
+ bp->b_ops = &xfs_bmbt_buf_ops;
memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
@@ -4075,8 +4081,9 @@ xfs_bmap_read_extents(
* pointer (leftmost) at each level.
*/
while (level-- > 0) {
- if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
- XFS_BMAP_BTREE_REF)))
+ error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
+ XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
+ if (error)
return error;
block = XFS_BUF_TO_BLOCK(bp);
XFS_WANT_CORRUPTED_GOTO(
@@ -4121,7 +4128,8 @@ xfs_bmap_read_extents(
*/
nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
if (nextbno != NULLFSBLOCK)
- xfs_btree_reada_bufl(mp, nextbno, 1);
+ xfs_btree_reada_bufl(mp, nextbno, 1,
+ &xfs_bmbt_buf_ops);
/*
* Copy records into the extent records.
*/
@@ -4153,8 +4161,9 @@ xfs_bmap_read_extents(
*/
if (bno == NULLFSBLOCK)
break;
- if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
- XFS_BMAP_BTREE_REF)))
+ error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
+ XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
+ if (error)
return error;
block = XFS_BUF_TO_BLOCK(bp);
}
@@ -4616,12 +4625,11 @@ xfs_bmapi_delay(
STATIC int
-xfs_bmapi_allocate(
- struct xfs_bmalloca *bma,
- int flags)
+__xfs_bmapi_allocate(
+ struct xfs_bmalloca *bma)
{
struct xfs_mount *mp = bma->ip->i_mount;
- int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
+ int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ?
XFS_ATTR_FORK : XFS_DATA_FORK;
struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
int tmp_logflags = 0;
@@ -4654,24 +4662,27 @@ xfs_bmapi_allocate(
* Indicate if this is the first user data in the file, or just any
* user data.
*/
- if (!(flags & XFS_BMAPI_METADATA)) {
+ if (!(bma->flags & XFS_BMAPI_METADATA)) {
bma->userdata = (bma->offset == 0) ?
XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA;
}
- bma->minlen = (flags & XFS_BMAPI_CONTIG) ? bma->length : 1;
+ bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1;
/*
* Only want to do the alignment at the eof if it is userdata and
* allocation length is larger than a stripe unit.
*/
if (mp->m_dalign && bma->length >= mp->m_dalign &&
- !(flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) {
+ !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) {
error = xfs_bmap_isaeof(bma, whichfork);
if (error)
return error;
}
+ if (bma->flags & XFS_BMAPI_STACK_SWITCH)
+ bma->stack_switch = 1;
+
error = xfs_bmap_alloc(bma);
if (error)
return error;
@@ -4706,7 +4717,7 @@ xfs_bmapi_allocate(
* A wasdelay extent has been initialized, so shouldn't be flagged
* as unwritten.
*/
- if (!bma->wasdel && (flags & XFS_BMAPI_PREALLOC) &&
+ if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) &&
xfs_sb_version_hasextflgbit(&mp->m_sb))
bma->got.br_state = XFS_EXT_UNWRITTEN;
@@ -4734,6 +4745,45 @@ xfs_bmapi_allocate(
return 0;
}
+static void
+xfs_bmapi_allocate_worker(
+ struct work_struct *work)
+{
+ struct xfs_bmalloca *args = container_of(work,
+ struct xfs_bmalloca, work);
+ unsigned long pflags;
+
+ /* we are in a transaction context here */
+ current_set_flags_nested(&pflags, PF_FSTRANS);
+
+ args->result = __xfs_bmapi_allocate(args);
+ complete(args->done);
+
+ current_restore_flags_nested(&pflags, PF_FSTRANS);
+}
+
+/*
+ * Some allocation requests often come in with little stack to work on. Push
+ * them off to a worker thread so there is lots of stack to use. Otherwise just
+ * call directly to avoid the context switch overhead here.
+ */
+int
+xfs_bmapi_allocate(
+ struct xfs_bmalloca *args)
+{
+ DECLARE_COMPLETION_ONSTACK(done);
+
+ if (!args->stack_switch)
+ return __xfs_bmapi_allocate(args);
+
+
+ args->done = &done;
+ INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
+ queue_work(xfs_alloc_wq, &args->work);
+ wait_for_completion(&done);
+ return args->result;
+}
+
STATIC int
xfs_bmapi_convert_unwritten(
struct xfs_bmalloca *bma,
@@ -4919,6 +4969,7 @@ xfs_bmapi_write(
bma.conv = !!(flags & XFS_BMAPI_CONVERT);
bma.wasdel = wasdelay;
bma.offset = bno;
+ bma.flags = flags;
/*
* There's a 32/64 bit type mismatch between the
@@ -4934,7 +4985,7 @@ xfs_bmapi_write(
ASSERT(len > 0);
ASSERT(bma.length > 0);
- error = xfs_bmapi_allocate(&bma, flags);
+ error = xfs_bmapi_allocate(&bma);
if (error)
goto error0;
if (bma.blkno == NULLFSBLOCK)
@@ -5554,7 +5605,7 @@ xfs_getbmap(
xfs_ilock(ip, XFS_IOLOCK_SHARED);
if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) {
if (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size) {
- error = xfs_flush_pages(ip, 0, -1, 0, FI_REMAPF);
+ error = -filemap_write_and_wait(VFS_I(ip)->i_mapping);
if (error)
goto out_unlock_iolock;
}
@@ -5823,15 +5874,16 @@ xfs_bmap_check_leaf_extents(
*/
while (level-- > 0) {
/* See if buf is in cur first */
+ bp_release = 0;
bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
- if (bp) {
- bp_release = 0;
- } else {
+ if (!bp) {
bp_release = 1;
+ error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
+ XFS_BMAP_BTREE_REF,
+ &xfs_bmbt_buf_ops);
+ if (error)
+ goto error_norelse;
}
- if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
- XFS_BMAP_BTREE_REF)))
- goto error_norelse;
block = XFS_BUF_TO_BLOCK(bp);
XFS_WANT_CORRUPTED_GOTO(
xfs_bmap_sanity_check(mp, bp, level),
@@ -5908,15 +5960,16 @@ xfs_bmap_check_leaf_extents(
if (bno == NULLFSBLOCK)
break;
+ bp_release = 0;
bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
- if (bp) {
- bp_release = 0;
- } else {
+ if (!bp) {
bp_release = 1;
+ error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
+ XFS_BMAP_BTREE_REF,
+ &xfs_bmbt_buf_ops);
+ if (error)
+ goto error_norelse;
}
- if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
- XFS_BMAP_BTREE_REF)))
- goto error_norelse;
block = XFS_BUF_TO_BLOCK(bp);
}
if (bp_release) {
@@ -6007,7 +6060,9 @@ xfs_bmap_count_tree(
struct xfs_btree_block *block, *nextblock;
int numrecs;
- if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF)))
+ error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF,
+ &xfs_bmbt_buf_ops);
+ if (error)
return error;
*count += 1;
block = XFS_BUF_TO_BLOCK(bp);
@@ -6016,8 +6071,10 @@ xfs_bmap_count_tree(
/* Not at node above leaves, count this level of nodes */
nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
while (nextbno != NULLFSBLOCK) {
- if ((error = xfs_btree_read_bufl(mp, tp, nextbno,
- 0, &nbp, XFS_BMAP_BTREE_REF)))
+ error = xfs_btree_read_bufl(mp, tp, nextbno, 0, &nbp,
+ XFS_BMAP_BTREE_REF,
+ &xfs_bmbt_buf_ops);
+ if (error)
return error;
*count += 1;
nextblock = XFS_BUF_TO_BLOCK(nbp);
@@ -6046,8 +6103,10 @@ xfs_bmap_count_tree(
if (nextbno == NULLFSBLOCK)
break;
bno = nextbno;
- if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
- XFS_BMAP_BTREE_REF)))
+ error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
+ XFS_BMAP_BTREE_REF,
+ &xfs_bmbt_buf_ops);
+ if (error)
return error;
*count += 1;
block = XFS_BUF_TO_BLOCK(bp);
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 803b56d7ce16..5f469c3516eb 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -77,6 +77,7 @@ typedef struct xfs_bmap_free
* from written to unwritten, otherwise convert from unwritten to written.
*/
#define XFS_BMAPI_CONVERT 0x040
+#define XFS_BMAPI_STACK_SWITCH 0x080
#define XFS_BMAPI_FLAGS \
{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
@@ -85,7 +86,8 @@ typedef struct xfs_bmap_free
{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
{ XFS_BMAPI_IGSTATE, "IGSTATE" }, \
{ XFS_BMAPI_CONTIG, "CONTIG" }, \
- { XFS_BMAPI_CONVERT, "CONVERT" }
+ { XFS_BMAPI_CONVERT, "CONVERT" }, \
+ { XFS_BMAPI_STACK_SWITCH, "STACK_SWITCH" }
static inline int xfs_bmapi_aflag(int w)
@@ -133,6 +135,11 @@ typedef struct xfs_bmalloca {
char userdata;/* set if is user data */
char aeof; /* allocated space at eof */
char conv; /* overwriting unwritten extents */
+ char stack_switch;
+ int flags;
+ struct completion *done;
+ struct work_struct work;
+ int result;
} xfs_bmalloca_t;
/*
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 862084a47a7e..061b45cbe614 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -36,6 +36,7 @@
#include "xfs_bmap.h"
#include "xfs_error.h"
#include "xfs_quota.h"
+#include "xfs_trace.h"
/*
* Determine the extent state.
@@ -707,6 +708,67 @@ xfs_bmbt_key_diff(
cur->bc_rec.b.br_startoff;
}
+static void
+xfs_bmbt_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
+ unsigned int level;
+ int lblock_ok; /* block passes checks */
+
+ /* magic number and level verification.
+ *
+ * We don't know waht fork we belong to, so just verify that the level
+ * is less than the maximum of the two. Later checks will be more
+ * precise.
+ */
+ level = be16_to_cpu(block->bb_level);
+ lblock_ok = block->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC) &&
+ level < max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1]);
+
+ /* numrecs verification */
+ lblock_ok = lblock_ok &&
+ be16_to_cpu(block->bb_numrecs) <= mp->m_bmap_dmxr[level != 0];
+
+ /* sibling pointer verification */
+ lblock_ok = lblock_ok &&
+ block->bb_u.l.bb_leftsib &&
+ (block->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO) ||
+ XFS_FSB_SANITY_CHECK(mp,
+ be64_to_cpu(block->bb_u.l.bb_leftsib))) &&
+ block->bb_u.l.bb_rightsib &&
+ (block->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO) ||
+ XFS_FSB_SANITY_CHECK(mp,
+ be64_to_cpu(block->bb_u.l.bb_rightsib)));
+
+ if (!lblock_ok) {
+ trace_xfs_btree_corrupt(bp, _RET_IP_);
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, block);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_bmbt_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_bmbt_verify(bp);
+}
+
+static void
+xfs_bmbt_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_bmbt_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_bmbt_buf_ops = {
+ .verify_read = xfs_bmbt_read_verify,
+ .verify_write = xfs_bmbt_write_verify,
+};
+
+
#ifdef DEBUG
STATIC int
xfs_bmbt_keys_inorder(
@@ -746,6 +808,7 @@ static const struct xfs_btree_ops xfs_bmbt_ops = {
.init_rec_from_cur = xfs_bmbt_init_rec_from_cur,
.init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur,
.key_diff = xfs_bmbt_key_diff,
+ .buf_ops = &xfs_bmbt_buf_ops,
#ifdef DEBUG
.keys_inorder = xfs_bmbt_keys_inorder,
.recs_inorder = xfs_bmbt_recs_inorder,
diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h
index 0e66c4ea0f85..88469ca08696 100644
--- a/fs/xfs/xfs_bmap_btree.h
+++ b/fs/xfs/xfs_bmap_btree.h
@@ -236,5 +236,6 @@ extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
struct xfs_trans *, struct xfs_inode *, int);
+extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
#endif /* __XFS_BMAP_BTREE_H__ */
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index e53e317b1582..db010408d701 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -266,9 +266,13 @@ xfs_btree_dup_cursor(
for (i = 0; i < new->bc_nlevels; i++) {
new->bc_ptrs[i] = cur->bc_ptrs[i];
new->bc_ra[i] = cur->bc_ra[i];
- if ((bp = cur->bc_bufs[i])) {
- if ((error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
- XFS_BUF_ADDR(bp), mp->m_bsize, 0, &bp))) {
+ bp = cur->bc_bufs[i];
+ if (bp) {
+ error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
+ XFS_BUF_ADDR(bp), mp->m_bsize,
+ 0, &bp,
+ cur->bc_ops->buf_ops);
+ if (error) {
xfs_btree_del_cursor(new, error);
*ncur = NULL;
return error;
@@ -609,25 +613,26 @@ xfs_btree_offsets(
* Get a buffer for the block, return it read in.
* Long-form addressing.
*/
-int /* error */
+int
xfs_btree_read_bufl(
- xfs_mount_t *mp, /* file system mount point */
- xfs_trans_t *tp, /* transaction pointer */
- xfs_fsblock_t fsbno, /* file system block number */
- uint lock, /* lock flags for read_buf */
- xfs_buf_t **bpp, /* buffer for fsbno */
- int refval) /* ref count value for buffer */
-{
- xfs_buf_t *bp; /* return value */
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_fsblock_t fsbno, /* file system block number */
+ uint lock, /* lock flags for read_buf */
+ struct xfs_buf **bpp, /* buffer for fsbno */
+ int refval, /* ref count value for buffer */
+ const struct xfs_buf_ops *ops)
+{
+ struct xfs_buf *bp; /* return value */
xfs_daddr_t d; /* real disk block address */
- int error;
+ int error;
ASSERT(fsbno != NULLFSBLOCK);
d = XFS_FSB_TO_DADDR(mp, fsbno);
- if ((error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, d,
- mp->m_bsize, lock, &bp))) {
+ error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, d,
+ mp->m_bsize, lock, &bp, ops);
+ if (error)
return error;
- }
ASSERT(!xfs_buf_geterror(bp));
if (bp)
xfs_buf_set_ref(bp, refval);
@@ -642,15 +647,16 @@ xfs_btree_read_bufl(
/* ARGSUSED */
void
xfs_btree_reada_bufl(
- xfs_mount_t *mp, /* file system mount point */
- xfs_fsblock_t fsbno, /* file system block number */
- xfs_extlen_t count) /* count of filesystem blocks */
+ struct xfs_mount *mp, /* file system mount point */
+ xfs_fsblock_t fsbno, /* file system block number */
+ xfs_extlen_t count, /* count of filesystem blocks */
+ const struct xfs_buf_ops *ops)
{
xfs_daddr_t d;
ASSERT(fsbno != NULLFSBLOCK);
d = XFS_FSB_TO_DADDR(mp, fsbno);
- xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count);
+ xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count, ops);
}
/*
@@ -660,17 +666,18 @@ xfs_btree_reada_bufl(
/* ARGSUSED */
void
xfs_btree_reada_bufs(
- xfs_mount_t *mp, /* file system mount point */
- xfs_agnumber_t agno, /* allocation group number */
- xfs_agblock_t agbno, /* allocation group block number */
- xfs_extlen_t count) /* count of filesystem blocks */
+ struct xfs_mount *mp, /* file system mount point */
+ xfs_agnumber_t agno, /* allocation group number */
+ xfs_agblock_t agbno, /* allocation group block number */
+ xfs_extlen_t count, /* count of filesystem blocks */
+ const struct xfs_buf_ops *ops)
{
xfs_daddr_t d;
ASSERT(agno != NULLAGNUMBER);
ASSERT(agbno != NULLAGBLOCK);
d = XFS_AGB_TO_DADDR(mp, agno, agbno);
- xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count);
+ xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count, ops);
}
STATIC int
@@ -684,12 +691,14 @@ xfs_btree_readahead_lblock(
xfs_dfsbno_t right = be64_to_cpu(block->bb_u.l.bb_rightsib);
if ((lr & XFS_BTCUR_LEFTRA) && left != NULLDFSBNO) {
- xfs_btree_reada_bufl(cur->bc_mp, left, 1);
+ xfs_btree_reada_bufl(cur->bc_mp, left, 1,
+ cur->bc_ops->buf_ops);
rval++;
}
if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLDFSBNO) {
- xfs_btree_reada_bufl(cur->bc_mp, right, 1);
+ xfs_btree_reada_bufl(cur->bc_mp, right, 1,
+ cur->bc_ops->buf_ops);
rval++;
}
@@ -709,13 +718,13 @@ xfs_btree_readahead_sblock(
if ((lr & XFS_BTCUR_LEFTRA) && left != NULLAGBLOCK) {
xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
- left, 1);
+ left, 1, cur->bc_ops->buf_ops);
rval++;
}
if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLAGBLOCK) {
xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
- right, 1);
+ right, 1, cur->bc_ops->buf_ops);
rval++;
}
@@ -853,18 +862,22 @@ xfs_btree_set_sibling(
}
}
-STATIC void
+void
xfs_btree_init_block(
- struct xfs_btree_cur *cur,
- int level,
- int numrecs,
- struct xfs_btree_block *new) /* new block */
+ struct xfs_mount *mp,
+ struct xfs_buf *bp,
+ __u32 magic,
+ __u16 level,
+ __u16 numrecs,
+ unsigned int flags)
{
- new->bb_magic = cpu_to_be32(xfs_magics[cur->bc_btnum]);
+ struct xfs_btree_block *new = XFS_BUF_TO_BLOCK(bp);
+
+ new->bb_magic = cpu_to_be32(magic);
new->bb_level = cpu_to_be16(level);
new->bb_numrecs = cpu_to_be16(numrecs);
- if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
+ if (flags & XFS_BTREE_LONG_PTRS) {
new->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
new->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
} else {
@@ -873,6 +886,17 @@ xfs_btree_init_block(
}
}
+STATIC void
+xfs_btree_init_block_cur(
+ struct xfs_btree_cur *cur,
+ int level,
+ int numrecs,
+ struct xfs_buf *bp)
+{
+ xfs_btree_init_block(cur->bc_mp, bp, xfs_magics[cur->bc_btnum],
+ level, numrecs, cur->bc_flags);
+}
+
/*
* Return true if ptr is the last record in the btree and
* we need to track updateѕ to this record. The decision
@@ -972,6 +996,7 @@ xfs_btree_get_buf_block(
if (!*bpp)
return ENOMEM;
+ (*bpp)->b_ops = cur->bc_ops->buf_ops;
*block = XFS_BUF_TO_BLOCK(*bpp);
return 0;
}
@@ -998,19 +1023,15 @@ xfs_btree_read_buf_block(
d = xfs_btree_ptr_to_daddr(cur, ptr);
error = xfs_trans_read_buf(mp, cur->bc_tp, mp->m_ddev_targp, d,
- mp->m_bsize, flags, bpp);
+ mp->m_bsize, flags, bpp,
+ cur->bc_ops->buf_ops);
if (error)
return error;
ASSERT(!xfs_buf_geterror(*bpp));
-
xfs_btree_set_refs(cur, *bpp);
*block = XFS_BUF_TO_BLOCK(*bpp);
-
- error = xfs_btree_check_block(cur, *block, level, *bpp);
- if (error)
- xfs_trans_brelse(cur->bc_tp, *bpp);
- return error;
+ return 0;
}
/*
@@ -2183,7 +2204,7 @@ xfs_btree_split(
goto error0;
/* Fill in the btree header for the new right block. */
- xfs_btree_init_block(cur, xfs_btree_get_level(left), 0, right);
+ xfs_btree_init_block_cur(cur, xfs_btree_get_level(left), 0, rbp);
/*
* Split the entries between the old and the new block evenly.
@@ -2492,7 +2513,7 @@ xfs_btree_new_root(
nptr = 2;
}
/* Fill in the new block's btree header and log it. */
- xfs_btree_init_block(cur, cur->bc_nlevels, 2, new);
+ xfs_btree_init_block_cur(cur, cur->bc_nlevels, 2, nbp);
xfs_btree_log_block(cur, nbp, XFS_BB_ALL_BITS);
ASSERT(!xfs_btree_ptr_is_null(cur, &lptr) &&
!xfs_btree_ptr_is_null(cur, &rptr));
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 5b240de104c0..f932897194eb 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -188,6 +188,8 @@ struct xfs_btree_ops {
__int64_t (*key_diff)(struct xfs_btree_cur *cur,
union xfs_btree_key *key);
+ const struct xfs_buf_ops *buf_ops;
+
#ifdef DEBUG
/* check that k1 is lower than k2 */
int (*keys_inorder)(struct xfs_btree_cur *cur,
@@ -355,7 +357,8 @@ xfs_btree_read_bufl(
xfs_fsblock_t fsbno, /* file system block number */
uint lock, /* lock flags for read_buf */
struct xfs_buf **bpp, /* buffer for fsbno */
- int refval);/* ref count value for buffer */
+ int refval, /* ref count value for buffer */
+ const struct xfs_buf_ops *ops);
/*
* Read-ahead the block, don't wait for it, don't return a buffer.
@@ -365,7 +368,8 @@ void /* error */
xfs_btree_reada_bufl(
struct xfs_mount *mp, /* file system mount point */
xfs_fsblock_t fsbno, /* file system block number */
- xfs_extlen_t count); /* count of filesystem blocks */
+ xfs_extlen_t count, /* count of filesystem blocks */
+ const struct xfs_buf_ops *ops);
/*
* Read-ahead the block, don't wait for it, don't return a buffer.
@@ -376,8 +380,20 @@ xfs_btree_reada_bufs(
struct xfs_mount *mp, /* file system mount point */
xfs_agnumber_t agno, /* allocation group number */
xfs_agblock_t agbno, /* allocation group block number */
- xfs_extlen_t count); /* count of filesystem blocks */
+ xfs_extlen_t count, /* count of filesystem blocks */
+ const struct xfs_buf_ops *ops);
+/*
+ * Initialise a new btree block header
+ */
+void
+xfs_btree_init_block(
+ struct xfs_mount *mp,
+ struct xfs_buf *bp,
+ __u32 magic,
+ __u16 level,
+ __u16 numrecs,
+ unsigned int flags);
/*
* Common btree core entry points.
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 933b7930b863..56d1614760cf 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -175,7 +175,7 @@ xfs_buf_get_maps(
bp->b_map_count = map_count;
if (map_count == 1) {
- bp->b_maps = &bp->b_map;
+ bp->b_maps = &bp->__b_map;
return 0;
}
@@ -193,7 +193,7 @@ static void
xfs_buf_free_maps(
struct xfs_buf *bp)
{
- if (bp->b_maps != &bp->b_map) {
+ if (bp->b_maps != &bp->__b_map) {
kmem_free(bp->b_maps);
bp->b_maps = NULL;
}
@@ -377,8 +377,8 @@ xfs_buf_allocate_memory(
}
use_alloc_page:
- start = BBTOB(bp->b_map.bm_bn) >> PAGE_SHIFT;
- end = (BBTOB(bp->b_map.bm_bn + bp->b_length) + PAGE_SIZE - 1)
+ start = BBTOB(bp->b_maps[0].bm_bn) >> PAGE_SHIFT;
+ end = (BBTOB(bp->b_maps[0].bm_bn + bp->b_length) + PAGE_SIZE - 1)
>> PAGE_SHIFT;
page_count = end - start;
error = _xfs_buf_get_pages(bp, page_count, flags);
@@ -569,7 +569,9 @@ found:
*/
if (bp->b_flags & XBF_STALE) {
ASSERT((bp->b_flags & _XBF_DELWRI_Q) == 0);
+ ASSERT(bp->b_iodone == NULL);
bp->b_flags &= _XBF_KMEM | _XBF_PAGES;
+ bp->b_ops = NULL;
}
trace_xfs_buf_find(bp, flags, _RET_IP_);
@@ -638,7 +640,7 @@ _xfs_buf_read(
xfs_buf_flags_t flags)
{
ASSERT(!(flags & XBF_WRITE));
- ASSERT(bp->b_map.bm_bn != XFS_BUF_DADDR_NULL);
+ ASSERT(bp->b_maps[0].bm_bn != XFS_BUF_DADDR_NULL);
bp->b_flags &= ~(XBF_WRITE | XBF_ASYNC | XBF_READ_AHEAD);
bp->b_flags |= flags & (XBF_READ | XBF_ASYNC | XBF_READ_AHEAD);
@@ -654,7 +656,8 @@ xfs_buf_read_map(
struct xfs_buftarg *target,
struct xfs_buf_map *map,
int nmaps,
- xfs_buf_flags_t flags)
+ xfs_buf_flags_t flags,
+ const struct xfs_buf_ops *ops)
{
struct xfs_buf *bp;
@@ -666,6 +669,7 @@ xfs_buf_read_map(
if (!XFS_BUF_ISDONE(bp)) {
XFS_STATS_INC(xb_get_read);
+ bp->b_ops = ops;
_xfs_buf_read(bp, flags);
} else if (flags & XBF_ASYNC) {
/*
@@ -691,13 +695,14 @@ void
xfs_buf_readahead_map(
struct xfs_buftarg *target,
struct xfs_buf_map *map,
- int nmaps)
+ int nmaps,
+ const struct xfs_buf_ops *ops)
{
if (bdi_read_congested(target->bt_bdi))
return;
xfs_buf_read_map(target, map, nmaps,
- XBF_TRYLOCK|XBF_ASYNC|XBF_READ_AHEAD);
+ XBF_TRYLOCK|XBF_ASYNC|XBF_READ_AHEAD, ops);
}
/*
@@ -709,10 +714,10 @@ xfs_buf_read_uncached(
struct xfs_buftarg *target,
xfs_daddr_t daddr,
size_t numblks,
- int flags)
+ int flags,
+ const struct xfs_buf_ops *ops)
{
- xfs_buf_t *bp;
- int error;
+ struct xfs_buf *bp;
bp = xfs_buf_get_uncached(target, numblks, flags);
if (!bp)
@@ -723,13 +728,10 @@ xfs_buf_read_uncached(
bp->b_bn = daddr;
bp->b_maps[0].bm_bn = daddr;
bp->b_flags |= XBF_READ;
+ bp->b_ops = ops;
xfsbdstrat(target->bt_mount, bp);
- error = xfs_buf_iowait(bp);
- if (error) {
- xfs_buf_relse(bp);
- return NULL;
- }
+ xfs_buf_iowait(bp);
return bp;
}
@@ -999,27 +1001,37 @@ STATIC void
xfs_buf_iodone_work(
struct work_struct *work)
{
- xfs_buf_t *bp =
+ struct xfs_buf *bp =
container_of(work, xfs_buf_t, b_iodone_work);
+ bool read = !!(bp->b_flags & XBF_READ);
+
+ bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD);
+ if (read && bp->b_ops)
+ bp->b_ops->verify_read(bp);
if (bp->b_iodone)
(*(bp->b_iodone))(bp);
else if (bp->b_flags & XBF_ASYNC)
xfs_buf_relse(bp);
+ else {
+ ASSERT(read && bp->b_ops);
+ complete(&bp->b_iowait);
+ }
}
void
xfs_buf_ioend(
- xfs_buf_t *bp,
- int schedule)
+ struct xfs_buf *bp,
+ int schedule)
{
+ bool read = !!(bp->b_flags & XBF_READ);
+
trace_xfs_buf_iodone(bp, _RET_IP_);
- bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD);
if (bp->b_error == 0)
bp->b_flags |= XBF_DONE;
- if ((bp->b_iodone) || (bp->b_flags & XBF_ASYNC)) {
+ if (bp->b_iodone || (read && bp->b_ops) || (bp->b_flags & XBF_ASYNC)) {
if (schedule) {
INIT_WORK(&bp->b_iodone_work, xfs_buf_iodone_work);
queue_work(xfslogd_workqueue, &bp->b_iodone_work);
@@ -1027,6 +1039,7 @@ xfs_buf_ioend(
xfs_buf_iodone_work(&bp->b_iodone_work);
}
} else {
+ bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD);
complete(&bp->b_iowait);
}
}
@@ -1197,9 +1210,14 @@ xfs_buf_bio_end_io(
{
xfs_buf_t *bp = (xfs_buf_t *)bio->bi_private;
- xfs_buf_ioerror(bp, -error);
+ /*
+ * don't overwrite existing errors - otherwise we can lose errors on
+ * buffers that require multiple bios to complete.
+ */
+ if (!bp->b_error)
+ xfs_buf_ioerror(bp, -error);
- if (!error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
+ if (!bp->b_error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp));
_xfs_buf_ioend(bp, 1);
@@ -1279,6 +1297,11 @@ next_chunk:
if (size)
goto next_chunk;
} else {
+ /*
+ * This is guaranteed not to be the last io reference count
+ * because the caller (xfs_buf_iorequest) holds a count itself.
+ */
+ atomic_dec(&bp->b_io_remaining);
xfs_buf_ioerror(bp, EIO);
bio_put(bio);
}
@@ -1304,6 +1327,20 @@ _xfs_buf_ioapply(
rw |= REQ_FUA;
if (bp->b_flags & XBF_FLUSH)
rw |= REQ_FLUSH;
+
+ /*
+ * Run the write verifier callback function if it exists. If
+ * this function fails it will mark the buffer with an error and
+ * the IO should not be dispatched.
+ */
+ if (bp->b_ops) {
+ bp->b_ops->verify_write(bp);
+ if (bp->b_error) {
+ xfs_force_shutdown(bp->b_target->bt_mount,
+ SHUTDOWN_CORRUPT_INCORE);
+ return;
+ }
+ }
} else if (bp->b_flags & XBF_READ_AHEAD) {
rw = READA;
} else {
@@ -1672,7 +1709,7 @@ xfs_buf_cmp(
struct xfs_buf *bp = container_of(b, struct xfs_buf, b_list);
xfs_daddr_t diff;
- diff = ap->b_map.bm_bn - bp->b_map.bm_bn;
+ diff = ap->b_maps[0].bm_bn - bp->b_maps[0].bm_bn;
if (diff < 0)
return -1;
if (diff > 0)
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 7c0b6a0a1557..433a12ed7b17 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -100,6 +100,7 @@ typedef struct xfs_buftarg {
struct xfs_buf;
typedef void (*xfs_buf_iodone_t)(struct xfs_buf *);
+
#define XB_PAGES 2
struct xfs_buf_map {
@@ -110,6 +111,11 @@ struct xfs_buf_map {
#define DEFINE_SINGLE_BUF_MAP(map, blkno, numblk) \
struct xfs_buf_map (map) = { .bm_bn = (blkno), .bm_len = (numblk) };
+struct xfs_buf_ops {
+ void (*verify_read)(struct xfs_buf *);
+ void (*verify_write)(struct xfs_buf *);
+};
+
typedef struct xfs_buf {
/*
* first cacheline holds all the fields needed for an uncontended cache
@@ -145,7 +151,7 @@ typedef struct xfs_buf {
struct page **b_pages; /* array of page pointers */
struct page *b_page_array[XB_PAGES]; /* inline pages */
struct xfs_buf_map *b_maps; /* compound buffer map */
- struct xfs_buf_map b_map; /* inline compound buffer map */
+ struct xfs_buf_map __b_map; /* inline compound buffer map */
int b_map_count;
int b_io_length; /* IO size in BBs */
atomic_t b_pin_count; /* pin count */
@@ -153,13 +159,13 @@ typedef struct xfs_buf {
unsigned int b_page_count; /* size of page array */
unsigned int b_offset; /* page offset in first page */
unsigned short b_error; /* error code on I/O */
+ const struct xfs_buf_ops *b_ops;
#ifdef XFS_BUF_LOCK_TRACKING
int b_last_holder;
#endif
} xfs_buf_t;
-
/* Finding and Reading Buffers */
struct xfs_buf *_xfs_buf_find(struct xfs_buftarg *target,
struct xfs_buf_map *map, int nmaps,
@@ -196,9 +202,11 @@ struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target,
xfs_buf_flags_t flags);
struct xfs_buf *xfs_buf_read_map(struct xfs_buftarg *target,
struct xfs_buf_map *map, int nmaps,
- xfs_buf_flags_t flags);
+ xfs_buf_flags_t flags,
+ const struct xfs_buf_ops *ops);
void xfs_buf_readahead_map(struct xfs_buftarg *target,
- struct xfs_buf_map *map, int nmaps);
+ struct xfs_buf_map *map, int nmaps,
+ const struct xfs_buf_ops *ops);
static inline struct xfs_buf *
xfs_buf_get(
@@ -216,20 +224,22 @@ xfs_buf_read(
struct xfs_buftarg *target,
xfs_daddr_t blkno,
size_t numblks,
- xfs_buf_flags_t flags)
+ xfs_buf_flags_t flags,
+ const struct xfs_buf_ops *ops)
{
DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
- return xfs_buf_read_map(target, &map, 1, flags);
+ return xfs_buf_read_map(target, &map, 1, flags, ops);
}
static inline void
xfs_buf_readahead(
struct xfs_buftarg *target,
xfs_daddr_t blkno,
- size_t numblks)
+ size_t numblks,
+ const struct xfs_buf_ops *ops)
{
DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
- return xfs_buf_readahead_map(target, &map, 1);
+ return xfs_buf_readahead_map(target, &map, 1, ops);
}
struct xfs_buf *xfs_buf_get_empty(struct xfs_buftarg *target, size_t numblks);
@@ -239,7 +249,8 @@ int xfs_buf_associate_memory(struct xfs_buf *bp, void *mem, size_t length);
struct xfs_buf *xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks,
int flags);
struct xfs_buf *xfs_buf_read_uncached(struct xfs_buftarg *target,
- xfs_daddr_t daddr, size_t numblks, int flags);
+ xfs_daddr_t daddr, size_t numblks, int flags,
+ const struct xfs_buf_ops *ops);
void xfs_buf_hold(struct xfs_buf *bp);
/* Releasing Buffers */
@@ -319,8 +330,8 @@ void xfs_buf_stale(struct xfs_buf *bp);
* In future, uncached buffers will pass the block number directly to the io
* request function and hence these macros will go away at that point.
*/
-#define XFS_BUF_ADDR(bp) ((bp)->b_map.bm_bn)
-#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_map.bm_bn = (xfs_daddr_t)(bno))
+#define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn)
+#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno))
static inline void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref)
{
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index a8d0ed911196..77b09750e92c 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -71,7 +71,7 @@ xfs_buf_item_log_debug(
chunk_num = byte >> XFS_BLF_SHIFT;
word_num = chunk_num >> BIT_TO_WORD_SHIFT;
bit_num = chunk_num & (NBWORD - 1);
- wordp = &(bip->bli_format.blf_data_map[word_num]);
+ wordp = &(bip->__bli_format.blf_data_map[word_num]);
bit_set = *wordp & (1 << bit_num);
ASSERT(bit_set);
byte++;
@@ -237,7 +237,7 @@ xfs_buf_item_size(
* cancel flag in it.
*/
trace_xfs_buf_item_size_stale(bip);
- ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL);
+ ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
return bip->bli_format_count;
}
@@ -278,7 +278,7 @@ xfs_buf_item_format_segment(
uint buffer_offset;
/* copy the flags across from the base format item */
- blfp->blf_flags = bip->bli_format.blf_flags;
+ blfp->blf_flags = bip->__bli_format.blf_flags;
/*
* Base size is the actual size of the ondisk structure - it reflects
@@ -287,6 +287,17 @@ xfs_buf_item_format_segment(
*/
base_size = offsetof(struct xfs_buf_log_format, blf_data_map) +
(blfp->blf_map_size * sizeof(blfp->blf_data_map[0]));
+
+ nvecs = 0;
+ first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, 0);
+ if (!(bip->bli_flags & XFS_BLI_STALE) && first_bit == -1) {
+ /*
+ * If the map is not be dirty in the transaction, mark
+ * the size as zero and do not advance the vector pointer.
+ */
+ goto out;
+ }
+
vecp->i_addr = blfp;
vecp->i_len = base_size;
vecp->i_type = XLOG_REG_TYPE_BFORMAT;
@@ -301,15 +312,13 @@ xfs_buf_item_format_segment(
*/
trace_xfs_buf_item_format_stale(bip);
ASSERT(blfp->blf_flags & XFS_BLF_CANCEL);
- blfp->blf_size = nvecs;
- return vecp;
+ goto out;
}
/*
* Fill in an iovec for each set of contiguous chunks.
*/
- first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, 0);
- ASSERT(first_bit != -1);
+
last_bit = first_bit;
nbits = 1;
for (;;) {
@@ -371,7 +380,8 @@ xfs_buf_item_format_segment(
nbits++;
}
}
- bip->bli_format.blf_size = nvecs;
+out:
+ blfp->blf_size = nvecs;
return vecp;
}
@@ -405,7 +415,7 @@ xfs_buf_item_format(
if (bip->bli_flags & XFS_BLI_INODE_BUF) {
if (!((bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF) &&
xfs_log_item_in_current_chkpt(lip)))
- bip->bli_format.blf_flags |= XFS_BLF_INODE_BUF;
+ bip->__bli_format.blf_flags |= XFS_BLF_INODE_BUF;
bip->bli_flags &= ~XFS_BLI_INODE_BUF;
}
@@ -485,7 +495,7 @@ xfs_buf_item_unpin(
ASSERT(bip->bli_flags & XFS_BLI_STALE);
ASSERT(xfs_buf_islocked(bp));
ASSERT(XFS_BUF_ISSTALE(bp));
- ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL);
+ ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
trace_xfs_buf_item_unpin_stale(bip);
@@ -526,7 +536,25 @@ xfs_buf_item_unpin(
}
xfs_buf_relse(bp);
} else if (freed && remove) {
+ /*
+ * There are currently two references to the buffer - the active
+ * LRU reference and the buf log item. What we are about to do
+ * here - simulate a failed IO completion - requires 3
+ * references.
+ *
+ * The LRU reference is removed by the xfs_buf_stale() call. The
+ * buf item reference is removed by the xfs_buf_iodone()
+ * callback that is run by xfs_buf_do_callbacks() during ioend
+ * processing (via the bp->b_iodone callback), and then finally
+ * the ioend processing will drop the IO reference if the buffer
+ * is marked XBF_ASYNC.
+ *
+ * Hence we need to take an additional reference here so that IO
+ * completion processing doesn't free the buffer prematurely.
+ */
xfs_buf_lock(bp);
+ xfs_buf_hold(bp);
+ bp->b_flags |= XBF_ASYNC;
xfs_buf_ioerror(bp, EIO);
XFS_BUF_UNDONE(bp);
xfs_buf_stale(bp);
@@ -583,7 +611,7 @@ xfs_buf_item_unlock(
{
struct xfs_buf_log_item *bip = BUF_ITEM(lip);
struct xfs_buf *bp = bip->bli_buf;
- int aborted;
+ int aborted, clean, i;
uint hold;
/* Clear the buffer's association with this transaction. */
@@ -613,7 +641,7 @@ xfs_buf_item_unlock(
*/
if (bip->bli_flags & XFS_BLI_STALE) {
trace_xfs_buf_item_unlock_stale(bip);
- ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL);
+ ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
if (!aborted) {
atomic_dec(&bip->bli_refcount);
return;
@@ -626,8 +654,15 @@ xfs_buf_item_unlock(
* If the buf item isn't tracking any data, free it, otherwise drop the
* reference we hold to it.
*/
- if (xfs_bitmap_empty(bip->bli_format.blf_data_map,
- bip->bli_format.blf_map_size))
+ clean = 1;
+ for (i = 0; i < bip->bli_format_count; i++) {
+ if (!xfs_bitmap_empty(bip->bli_formats[i].blf_data_map,
+ bip->bli_formats[i].blf_map_size)) {
+ clean = 0;
+ break;
+ }
+ }
+ if (clean)
xfs_buf_item_relse(bp);
else
atomic_dec(&bip->bli_refcount);
@@ -698,7 +733,7 @@ xfs_buf_item_get_format(
bip->bli_format_count = count;
if (count == 1) {
- bip->bli_formats = &bip->bli_format;
+ bip->bli_formats = &bip->__bli_format;
return 0;
}
@@ -713,7 +748,7 @@ STATIC void
xfs_buf_item_free_format(
struct xfs_buf_log_item *bip)
{
- if (bip->bli_formats != &bip->bli_format) {
+ if (bip->bli_formats != &bip->__bli_format) {
kmem_free(bip->bli_formats);
bip->bli_formats = NULL;
}
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index 6850f49f4af3..16def435944a 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -104,7 +104,7 @@ typedef struct xfs_buf_log_item {
#endif
int bli_format_count; /* count of headers */
struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */
- struct xfs_buf_log_format bli_format; /* embedded in-log header */
+ struct xfs_buf_log_format __bli_format; /* embedded in-log header */
} xfs_buf_log_item_t;
void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
diff --git a/fs/xfs/xfs_cksum.h b/fs/xfs/xfs_cksum.h
new file mode 100644
index 000000000000..fad1676ad8cd
--- /dev/null
+++ b/fs/xfs/xfs_cksum.h
@@ -0,0 +1,63 @@
+#ifndef _XFS_CKSUM_H
+#define _XFS_CKSUM_H 1
+
+#define XFS_CRC_SEED (~(__uint32_t)0)
+
+/*
+ * Calculate the intermediate checksum for a buffer that has the CRC field
+ * inside it. The offset of the 32bit crc fields is passed as the
+ * cksum_offset parameter.
+ */
+static inline __uint32_t
+xfs_start_cksum(char *buffer, size_t length, unsigned long cksum_offset)
+{
+ __uint32_t zero = 0;
+ __uint32_t crc;
+
+ /* Calculate CRC up to the checksum. */
+ crc = crc32c(XFS_CRC_SEED, buffer, cksum_offset);
+
+ /* Skip checksum field */
+ crc = crc32c(crc, &zero, sizeof(__u32));
+
+ /* Calculate the rest of the CRC. */
+ return crc32c(crc, &buffer[cksum_offset + sizeof(__be32)],
+ length - (cksum_offset + sizeof(__be32)));
+}
+
+/*
+ * Convert the intermediate checksum to the final ondisk format.
+ *
+ * The CRC32c calculation uses LE format even on BE machines, but returns the
+ * result in host endian format. Hence we need to byte swap it back to LE format
+ * so that it is consistent on disk.
+ */
+static inline __le32
+xfs_end_cksum(__uint32_t crc)
+{
+ return ~cpu_to_le32(crc);
+}
+
+/*
+ * Helper to generate the checksum for a buffer.
+ */
+static inline void
+xfs_update_cksum(char *buffer, size_t length, unsigned long cksum_offset)
+{
+ __uint32_t crc = xfs_start_cksum(buffer, length, cksum_offset);
+
+ *(__le32 *)(buffer + cksum_offset) = xfs_end_cksum(crc);
+}
+
+/*
+ * Helper to verify the checksum for a buffer.
+ */
+static inline int
+xfs_verify_cksum(char *buffer, size_t length, unsigned long cksum_offset)
+{
+ __uint32_t crc = xfs_start_cksum(buffer, length, cksum_offset);
+
+ return *(__le32 *)(buffer + cksum_offset) == xfs_end_cksum(crc);
+}
+
+#endif /* _XFS_CKSUM_H */
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 7bfb7dd334fc..4d7696a02418 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -91,6 +91,84 @@ STATIC int xfs_da_blk_unlink(xfs_da_state_t *state,
xfs_da_state_blk_t *save_blk);
STATIC void xfs_da_state_kill_altpath(xfs_da_state_t *state);
+static void
+xfs_da_node_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_da_node_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC);
+ block_ok = block_ok &&
+ be16_to_cpu(hdr->level) > 0 &&
+ be16_to_cpu(hdr->count) > 0 ;
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+
+}
+
+static void
+xfs_da_node_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_da_node_verify(bp);
+}
+
+/*
+ * leaf/node format detection on trees is sketchy, so a node read can be done on
+ * leaf level blocks when detection identifies the tree as a node format tree
+ * incorrectly. In this case, we need to swap the verifier to match the correct
+ * format of the block being read.
+ */
+static void
+xfs_da_node_read_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_da_blkinfo *info = bp->b_addr;
+
+ switch (be16_to_cpu(info->magic)) {
+ case XFS_DA_NODE_MAGIC:
+ xfs_da_node_verify(bp);
+ break;
+ case XFS_ATTR_LEAF_MAGIC:
+ bp->b_ops = &xfs_attr_leaf_buf_ops;
+ bp->b_ops->verify_read(bp);
+ return;
+ case XFS_DIR2_LEAFN_MAGIC:
+ bp->b_ops = &xfs_dir2_leafn_buf_ops;
+ bp->b_ops->verify_read(bp);
+ return;
+ default:
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
+ mp, info);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ break;
+ }
+}
+
+const struct xfs_buf_ops xfs_da_node_buf_ops = {
+ .verify_read = xfs_da_node_read_verify,
+ .verify_write = xfs_da_node_write_verify,
+};
+
+
+int
+xfs_da_node_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t bno,
+ xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp,
+ int which_fork)
+{
+ return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
+ which_fork, &xfs_da_node_buf_ops);
+}
+
/*========================================================================
* Routines used for growing the Btree.
*========================================================================*/
@@ -125,6 +203,7 @@ xfs_da_node_create(xfs_da_args_t *args, xfs_dablk_t blkno, int level,
xfs_trans_log_buf(tp, bp,
XFS_DA_LOGRANGE(node, &node->hdr, sizeof(node->hdr)));
+ bp->b_ops = &xfs_da_node_buf_ops;
*bpp = bp;
return(0);
}
@@ -324,6 +403,8 @@ xfs_da_root_split(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
}
memcpy(node, oldroot, size);
xfs_trans_log_buf(tp, bp, 0, size - 1);
+
+ bp->b_ops = blk1->bp->b_ops;
blk1->bp = bp;
blk1->blkno = blkno;
@@ -746,7 +827,7 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk)
*/
child = be32_to_cpu(oldroot->btree[0].before);
ASSERT(child != 0);
- error = xfs_da_read_buf(args->trans, args->dp, child, -1, &bp,
+ error = xfs_da_node_read(args->trans, args->dp, child, -1, &bp,
args->whichfork);
if (error)
return(error);
@@ -754,7 +835,14 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk)
xfs_da_blkinfo_onlychild_validate(bp->b_addr,
be16_to_cpu(oldroot->hdr.level));
+ /*
+ * This could be copying a leaf back into the root block in the case of
+ * there only being a single leaf block left in the tree. Hence we have
+ * to update the b_ops pointer as well to match the buffer type change
+ * that could occur.
+ */
memcpy(root_blk->bp->b_addr, bp->b_addr, state->blocksize);
+ root_blk->bp->b_ops = bp->b_ops;
xfs_trans_log_buf(args->trans, root_blk->bp, 0, state->blocksize - 1);
error = xfs_da_shrink_inode(args, child, bp);
return(error);
@@ -779,6 +867,8 @@ xfs_da_node_toosmall(xfs_da_state_t *state, int *action)
xfs_dablk_t blkno;
struct xfs_buf *bp;
+ trace_xfs_da_node_toosmall(state->args);
+
/*
* Check for the degenerate case of the block being over 50% full.
* If so, it's not worth even looking to see if we might be able
@@ -835,7 +925,7 @@ xfs_da_node_toosmall(xfs_da_state_t *state, int *action)
blkno = be32_to_cpu(info->back);
if (blkno == 0)
continue;
- error = xfs_da_read_buf(state->args->trans, state->args->dp,
+ error = xfs_da_node_read(state->args->trans, state->args->dp,
blkno, -1, &bp, state->args->whichfork);
if (error)
return(error);
@@ -900,6 +990,8 @@ xfs_da_fixhashpath(xfs_da_state_t *state, xfs_da_state_path_t *path)
xfs_dahash_t lasthash=0;
int level, count;
+ trace_xfs_da_fixhashpath(state->args);
+
level = path->active-1;
blk = &path->blk[ level ];
switch (blk->magic) {
@@ -1079,7 +1171,7 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result)
* Read the next node down in the tree.
*/
blk->blkno = blkno;
- error = xfs_da_read_buf(args->trans, args->dp, blkno,
+ error = xfs_da_node_read(args->trans, args->dp, blkno,
-1, &blk->bp, args->whichfork);
if (error) {
blk->blkno = 0;
@@ -1241,7 +1333,7 @@ xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
new_info->forw = cpu_to_be32(old_blk->blkno);
new_info->back = old_info->back;
if (old_info->back) {
- error = xfs_da_read_buf(args->trans, args->dp,
+ error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(old_info->back),
-1, &bp, args->whichfork);
if (error)
@@ -1262,7 +1354,7 @@ xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
new_info->forw = old_info->forw;
new_info->back = cpu_to_be32(old_blk->blkno);
if (old_info->forw) {
- error = xfs_da_read_buf(args->trans, args->dp,
+ error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(old_info->forw),
-1, &bp, args->whichfork);
if (error)
@@ -1362,7 +1454,7 @@ xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk,
trace_xfs_da_unlink_back(args);
save_info->back = drop_info->back;
if (drop_info->back) {
- error = xfs_da_read_buf(args->trans, args->dp,
+ error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(drop_info->back),
-1, &bp, args->whichfork);
if (error)
@@ -1379,7 +1471,7 @@ xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk,
trace_xfs_da_unlink_forward(args);
save_info->forw = drop_info->forw;
if (drop_info->forw) {
- error = xfs_da_read_buf(args->trans, args->dp,
+ error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(drop_info->forw),
-1, &bp, args->whichfork);
if (error)
@@ -1417,6 +1509,8 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
xfs_dablk_t blkno=0;
int level, error;
+ trace_xfs_da_path_shift(state->args);
+
/*
* Roll up the Btree looking for the first block where our
* current index is not at the edge of the block. Note that
@@ -1463,8 +1557,8 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
* Read the next child block.
*/
blk->blkno = blkno;
- error = xfs_da_read_buf(args->trans, args->dp, blkno, -1,
- &blk->bp, args->whichfork);
+ error = xfs_da_node_read(args->trans, args->dp, blkno, -1,
+ &blk->bp, args->whichfork);
if (error)
return(error);
ASSERT(blk->bp != NULL);
@@ -1727,7 +1821,8 @@ xfs_da_swap_lastblock(
* Read the last block in the btree space.
*/
last_blkno = (xfs_dablk_t)lastoff - mp->m_dirblkfsbs;
- if ((error = xfs_da_read_buf(tp, ip, last_blkno, -1, &last_buf, w)))
+ error = xfs_da_node_read(tp, ip, last_blkno, -1, &last_buf, w);
+ if (error)
return error;
/*
* Copy the last block into the dead buffer and log it.
@@ -1753,7 +1848,8 @@ xfs_da_swap_lastblock(
* If the moved block has a left sibling, fix up the pointers.
*/
if ((sib_blkno = be32_to_cpu(dead_info->back))) {
- if ((error = xfs_da_read_buf(tp, ip, sib_blkno, -1, &sib_buf, w)))
+ error = xfs_da_node_read(tp, ip, sib_blkno, -1, &sib_buf, w);
+ if (error)
goto done;
sib_info = sib_buf->b_addr;
if (unlikely(
@@ -1774,7 +1870,8 @@ xfs_da_swap_lastblock(
* If the moved block has a right sibling, fix up the pointers.
*/
if ((sib_blkno = be32_to_cpu(dead_info->forw))) {
- if ((error = xfs_da_read_buf(tp, ip, sib_blkno, -1, &sib_buf, w)))
+ error = xfs_da_node_read(tp, ip, sib_blkno, -1, &sib_buf, w);
+ if (error)
goto done;
sib_info = sib_buf->b_addr;
if (unlikely(
@@ -1797,7 +1894,8 @@ xfs_da_swap_lastblock(
* Walk down the tree looking for the parent of the moved block.
*/
for (;;) {
- if ((error = xfs_da_read_buf(tp, ip, par_blkno, -1, &par_buf, w)))
+ error = xfs_da_node_read(tp, ip, par_blkno, -1, &par_buf, w);
+ if (error)
goto done;
par_node = par_buf->b_addr;
if (unlikely(par_node->hdr.info.magic !=
@@ -1847,7 +1945,8 @@ xfs_da_swap_lastblock(
error = XFS_ERROR(EFSCORRUPTED);
goto done;
}
- if ((error = xfs_da_read_buf(tp, ip, par_blkno, -1, &par_buf, w)))
+ error = xfs_da_node_read(tp, ip, par_blkno, -1, &par_buf, w);
+ if (error)
goto done;
par_node = par_buf->b_addr;
if (unlikely(
@@ -2133,7 +2232,8 @@ xfs_da_read_buf(
xfs_dablk_t bno,
xfs_daddr_t mappedbno,
struct xfs_buf **bpp,
- int whichfork)
+ int whichfork,
+ const struct xfs_buf_ops *ops)
{
struct xfs_buf *bp;
struct xfs_buf_map map;
@@ -2155,7 +2255,7 @@ xfs_da_read_buf(
error = xfs_trans_read_buf_map(dp->i_mount, trans,
dp->i_mount->m_ddev_targp,
- mapp, nmap, 0, &bp);
+ mapp, nmap, 0, &bp, ops);
if (error)
goto out_free;
@@ -2211,9 +2311,10 @@ xfs_da_reada_buf(
struct xfs_trans *trans,
struct xfs_inode *dp,
xfs_dablk_t bno,
- int whichfork)
+ xfs_daddr_t mappedbno,
+ int whichfork,
+ const struct xfs_buf_ops *ops)
{
- xfs_daddr_t mappedbno = -1;
struct xfs_buf_map map;
struct xfs_buf_map *mapp;
int nmap;
@@ -2221,7 +2322,7 @@ xfs_da_reada_buf(
mapp = &map;
nmap = 1;
- error = xfs_dabuf_map(trans, dp, bno, -1, whichfork,
+ error = xfs_dabuf_map(trans, dp, bno, mappedbno, whichfork,
&mapp, &nmap);
if (error) {
/* mapping a hole is not an error, but we don't continue */
@@ -2231,7 +2332,7 @@ xfs_da_reada_buf(
}
mappedbno = mapp[0].bm_bn;
- xfs_buf_readahead_map(dp->i_mount->m_ddev_targp, mapp, nmap);
+ xfs_buf_readahead_map(dp->i_mount->m_ddev_targp, mapp, nmap, ops);
out_free:
if (mapp != &map)
diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/xfs_da_btree.h
index 132adafb041e..ee5170c46ae1 100644
--- a/fs/xfs/xfs_da_btree.h
+++ b/fs/xfs/xfs_da_btree.h
@@ -18,7 +18,6 @@
#ifndef __XFS_DA_BTREE_H__
#define __XFS_DA_BTREE_H__
-struct xfs_buf;
struct xfs_bmap_free;
struct xfs_inode;
struct xfs_mount;
@@ -214,6 +213,9 @@ int xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
*/
int xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
xfs_da_state_blk_t *new_blk);
+int xfs_da_node_read(struct xfs_trans *tp, struct xfs_inode *dp,
+ xfs_dablk_t bno, xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp, int which_fork);
/*
* Utility routines.
@@ -226,9 +228,11 @@ int xfs_da_get_buf(struct xfs_trans *trans, struct xfs_inode *dp,
struct xfs_buf **bp, int whichfork);
int xfs_da_read_buf(struct xfs_trans *trans, struct xfs_inode *dp,
xfs_dablk_t bno, xfs_daddr_t mappedbno,
- struct xfs_buf **bpp, int whichfork);
+ struct xfs_buf **bpp, int whichfork,
+ const struct xfs_buf_ops *ops);
xfs_daddr_t xfs_da_reada_buf(struct xfs_trans *trans, struct xfs_inode *dp,
- xfs_dablk_t bno, int whichfork);
+ xfs_dablk_t bno, xfs_daddr_t mapped_bno,
+ int whichfork, const struct xfs_buf_ops *ops);
int xfs_da_shrink_inode(xfs_da_args_t *args, xfs_dablk_t dead_blkno,
struct xfs_buf *dead_buf);
diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c
index b9b8646e62db..d0e9c74d3d96 100644
--- a/fs/xfs/xfs_dfrag.c
+++ b/fs/xfs/xfs_dfrag.c
@@ -246,12 +246,10 @@ xfs_swap_extents(
goto out_unlock;
}
- if (VN_CACHED(VFS_I(tip)) != 0) {
- error = xfs_flushinval_pages(tip, 0, -1,
- FI_REMAPF_LOCKED);
- if (error)
- goto out_unlock;
- }
+ error = -filemap_write_and_wait(VFS_I(ip)->i_mapping);
+ if (error)
+ goto out_unlock;
+ truncate_pagecache_range(VFS_I(ip), 0, -1);
/* Verify O_DIRECT for ftmp */
if (VN_CACHED(VFS_I(tip)) != 0) {
@@ -315,8 +313,7 @@ xfs_swap_extents(
* are safe. We don't really care if non-io related
* fields change.
*/
-
- xfs_tosspages(ip, 0, -1, FI_REMAPF);
+ truncate_pagecache_range(VFS_I(ip), 0, -1);
tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT);
if ((error = xfs_trans_reserve(tp, 0,
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index e93ca8f054f4..12afe07a91d7 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -56,6 +56,214 @@ xfs_dir_startup(void)
xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2);
}
+static void
+xfs_dir2_block_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dir2_data_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
+ block_ok = block_ok && __xfs_dir2_data_check(NULL, bp) == 0;
+
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_dir2_block_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_block_verify(bp);
+}
+
+static void
+xfs_dir2_block_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_block_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_dir2_block_buf_ops = {
+ .verify_read = xfs_dir2_block_read_verify,
+ .verify_write = xfs_dir2_block_write_verify,
+};
+
+static int
+xfs_dir2_block_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ struct xfs_buf **bpp)
+{
+ struct xfs_mount *mp = dp->i_mount;
+
+ return xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, bpp,
+ XFS_DATA_FORK, &xfs_dir2_block_buf_ops);
+}
+
+static void
+xfs_dir2_block_need_space(
+ struct xfs_dir2_data_hdr *hdr,
+ struct xfs_dir2_block_tail *btp,
+ struct xfs_dir2_leaf_entry *blp,
+ __be16 **tagpp,
+ struct xfs_dir2_data_unused **dupp,
+ struct xfs_dir2_data_unused **enddupp,
+ int *compact,
+ int len)
+{
+ struct xfs_dir2_data_free *bf;
+ __be16 *tagp = NULL;
+ struct xfs_dir2_data_unused *dup = NULL;
+ struct xfs_dir2_data_unused *enddup = NULL;
+
+ *compact = 0;
+ bf = hdr->bestfree;
+
+ /*
+ * If there are stale entries we'll use one for the leaf.
+ */
+ if (btp->stale) {
+ if (be16_to_cpu(bf[0].length) >= len) {
+ /*
+ * The biggest entry enough to avoid compaction.
+ */
+ dup = (xfs_dir2_data_unused_t *)
+ ((char *)hdr + be16_to_cpu(bf[0].offset));
+ goto out;
+ }
+
+ /*
+ * Will need to compact to make this work.
+ * Tag just before the first leaf entry.
+ */
+ *compact = 1;
+ tagp = (__be16 *)blp - 1;
+
+ /* Data object just before the first leaf entry. */
+ dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
+
+ /*
+ * If it's not free then the data will go where the
+ * leaf data starts now, if it works at all.
+ */
+ if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
+ if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) *
+ (uint)sizeof(*blp) < len)
+ dup = NULL;
+ } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len)
+ dup = NULL;
+ else
+ dup = (xfs_dir2_data_unused_t *)blp;
+ goto out;
+ }
+
+ /*
+ * no stale entries, so just use free space.
+ * Tag just before the first leaf entry.
+ */
+ tagp = (__be16 *)blp - 1;
+
+ /* Data object just before the first leaf entry. */
+ enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
+
+ /*
+ * If it's not free then can't do this add without cleaning up:
+ * the space before the first leaf entry needs to be free so it
+ * can be expanded to hold the pointer to the new entry.
+ */
+ if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
+ /*
+ * Check out the biggest freespace and see if it's the same one.
+ */
+ dup = (xfs_dir2_data_unused_t *)
+ ((char *)hdr + be16_to_cpu(bf[0].offset));
+ if (dup != enddup) {
+ /*
+ * Not the same free entry, just check its length.
+ */
+ if (be16_to_cpu(dup->length) < len)
+ dup = NULL;
+ goto out;
+ }
+
+ /*
+ * It is the biggest freespace, can it hold the leaf too?
+ */
+ if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) {
+ /*
+ * Yes, use the second-largest entry instead if it works.
+ */
+ if (be16_to_cpu(bf[1].length) >= len)
+ dup = (xfs_dir2_data_unused_t *)
+ ((char *)hdr + be16_to_cpu(bf[1].offset));
+ else
+ dup = NULL;
+ }
+ }
+out:
+ *tagpp = tagp;
+ *dupp = dup;
+ *enddupp = enddup;
+}
+
+/*
+ * compact the leaf entries.
+ * Leave the highest-numbered stale entry stale.
+ * XXX should be the one closest to mid but mid is not yet computed.
+ */
+static void
+xfs_dir2_block_compact(
+ struct xfs_trans *tp,
+ struct xfs_buf *bp,
+ struct xfs_dir2_data_hdr *hdr,
+ struct xfs_dir2_block_tail *btp,
+ struct xfs_dir2_leaf_entry *blp,
+ int *needlog,
+ int *lfloghigh,
+ int *lfloglow)
+{
+ int fromidx; /* source leaf index */
+ int toidx; /* target leaf index */
+ int needscan = 0;
+ int highstale; /* high stale index */
+
+ fromidx = toidx = be32_to_cpu(btp->count) - 1;
+ highstale = *lfloghigh = -1;
+ for (; fromidx >= 0; fromidx--) {
+ if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) {
+ if (highstale == -1)
+ highstale = toidx;
+ else {
+ if (*lfloghigh == -1)
+ *lfloghigh = toidx;
+ continue;
+ }
+ }
+ if (fromidx < toidx)
+ blp[toidx] = blp[fromidx];
+ toidx--;
+ }
+ *lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1);
+ *lfloghigh -= be32_to_cpu(btp->stale) - 1;
+ be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1));
+ xfs_dir2_data_make_free(tp, bp,
+ (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr),
+ (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)),
+ needlog, &needscan);
+ blp += be32_to_cpu(btp->stale) - 1;
+ btp->stale = cpu_to_be32(1);
+ /*
+ * If we now need to rebuild the bestfree map, do so.
+ * This needs to happen before the next call to use_free.
+ */
+ if (needscan)
+ xfs_dir2_data_freescan(tp->t_mountp, hdr, needlog);
+}
+
/*
* Add an entry to a block directory.
*/
@@ -63,7 +271,6 @@ int /* error */
xfs_dir2_block_addname(
xfs_da_args_t *args) /* directory op arguments */
{
- xfs_dir2_data_free_t *bf; /* bestfree table in block */
xfs_dir2_data_hdr_t *hdr; /* block header */
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
struct xfs_buf *bp; /* buffer for block */
@@ -94,134 +301,44 @@ xfs_dir2_block_addname(
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
- /*
- * Read the (one and only) directory block into dabuf bp.
- */
- if ((error =
- xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &bp, XFS_DATA_FORK))) {
+
+ /* Read the (one and only) directory block into bp. */
+ error = xfs_dir2_block_read(tp, dp, &bp);
+ if (error)
return error;
- }
- ASSERT(bp != NULL);
- hdr = bp->b_addr;
- /*
- * Check the magic number, corrupted if wrong.
- */
- if (unlikely(hdr->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))) {
- XFS_CORRUPTION_ERROR("xfs_dir2_block_addname",
- XFS_ERRLEVEL_LOW, mp, hdr);
- xfs_trans_brelse(tp, bp);
- return XFS_ERROR(EFSCORRUPTED);
- }
+
len = xfs_dir2_data_entsize(args->namelen);
+
/*
* Set up pointers to parts of the block.
*/
- bf = hdr->bestfree;
+ hdr = bp->b_addr;
btp = xfs_dir2_block_tail_p(mp, hdr);
blp = xfs_dir2_block_leaf_p(btp);
+
/*
- * No stale entries? Need space for entry and new leaf.
- */
- if (!btp->stale) {
- /*
- * Tag just before the first leaf entry.
- */
- tagp = (__be16 *)blp - 1;
- /*
- * Data object just before the first leaf entry.
- */
- enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
- /*
- * If it's not free then can't do this add without cleaning up:
- * the space before the first leaf entry needs to be free so it
- * can be expanded to hold the pointer to the new entry.
- */
- if (be16_to_cpu(enddup->freetag) != XFS_DIR2_DATA_FREE_TAG)
- dup = enddup = NULL;
- /*
- * Check out the biggest freespace and see if it's the same one.
- */
- else {
- dup = (xfs_dir2_data_unused_t *)
- ((char *)hdr + be16_to_cpu(bf[0].offset));
- if (dup == enddup) {
- /*
- * It is the biggest freespace, is it too small
- * to hold the new leaf too?
- */
- if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) {
- /*
- * Yes, we use the second-largest
- * entry instead if it works.
- */
- if (be16_to_cpu(bf[1].length) >= len)
- dup = (xfs_dir2_data_unused_t *)
- ((char *)hdr +
- be16_to_cpu(bf[1].offset));
- else
- dup = NULL;
- }
- } else {
- /*
- * Not the same free entry,
- * just check its length.
- */
- if (be16_to_cpu(dup->length) < len) {
- dup = NULL;
- }
- }
- }
- compact = 0;
- }
- /*
- * If there are stale entries we'll use one for the leaf.
- * Is the biggest entry enough to avoid compaction?
- */
- else if (be16_to_cpu(bf[0].length) >= len) {
- dup = (xfs_dir2_data_unused_t *)
- ((char *)hdr + be16_to_cpu(bf[0].offset));
- compact = 0;
- }
- /*
- * Will need to compact to make this work.
+ * Find out if we can reuse stale entries or whether we need extra
+ * space for entry and new leaf.
*/
- else {
- /*
- * Tag just before the first leaf entry.
- */
- tagp = (__be16 *)blp - 1;
- /*
- * Data object just before the first leaf entry.
- */
- dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
- /*
- * If it's not free then the data will go where the
- * leaf data starts now, if it works at all.
- */
- if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
- if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) *
- (uint)sizeof(*blp) < len)
- dup = NULL;
- } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len)
- dup = NULL;
- else
- dup = (xfs_dir2_data_unused_t *)blp;
- compact = 1;
- }
+ xfs_dir2_block_need_space(hdr, btp, blp, &tagp, &dup,
+ &enddup, &compact, len);
+
/*
- * If this isn't a real add, we're done with the buffer.
+ * Done everything we need for a space check now.
*/
- if (args->op_flags & XFS_DA_OP_JUSTCHECK)
+ if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
xfs_trans_brelse(tp, bp);
+ if (!dup)
+ return XFS_ERROR(ENOSPC);
+ return 0;
+ }
+
/*
* If we don't have space for the new entry & leaf ...
*/
if (!dup) {
- /*
- * Not trying to actually do anything, or don't have
- * a space reservation: return no-space.
- */
- if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
+ /* Don't have a space reservation: return no-space. */
+ if (args->total == 0)
return XFS_ERROR(ENOSPC);
/*
* Convert to the next larger format.
@@ -232,65 +349,26 @@ xfs_dir2_block_addname(
return error;
return xfs_dir2_leaf_addname(args);
}
- /*
- * Just checking, and it would work, so say so.
- */
- if (args->op_flags & XFS_DA_OP_JUSTCHECK)
- return 0;
+
needlog = needscan = 0;
+
/*
* If need to compact the leaf entries, do it now.
- * Leave the highest-numbered stale entry stale.
- * XXX should be the one closest to mid but mid is not yet computed.
*/
if (compact) {
- int fromidx; /* source leaf index */
- int toidx; /* target leaf index */
-
- for (fromidx = toidx = be32_to_cpu(btp->count) - 1,
- highstale = lfloghigh = -1;
- fromidx >= 0;
- fromidx--) {
- if (blp[fromidx].address ==
- cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) {
- if (highstale == -1)
- highstale = toidx;
- else {
- if (lfloghigh == -1)
- lfloghigh = toidx;
- continue;
- }
- }
- if (fromidx < toidx)
- blp[toidx] = blp[fromidx];
- toidx--;
- }
- lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1);
- lfloghigh -= be32_to_cpu(btp->stale) - 1;
- be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1));
- xfs_dir2_data_make_free(tp, bp,
- (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr),
- (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)),
- &needlog, &needscan);
- blp += be32_to_cpu(btp->stale) - 1;
- btp->stale = cpu_to_be32(1);
+ xfs_dir2_block_compact(tp, bp, hdr, btp, blp, &needlog,
+ &lfloghigh, &lfloglow);
+ /* recalculate blp post-compaction */
+ blp = xfs_dir2_block_leaf_p(btp);
+ } else if (btp->stale) {
/*
- * If we now need to rebuild the bestfree map, do so.
- * This needs to happen before the next call to use_free.
+ * Set leaf logging boundaries to impossible state.
+ * For the no-stale case they're set explicitly.
*/
- if (needscan) {
- xfs_dir2_data_freescan(mp, hdr, &needlog);
- needscan = 0;
- }
- }
- /*
- * Set leaf logging boundaries to impossible state.
- * For the no-stale case they're set explicitly.
- */
- else if (btp->stale) {
lfloglow = be32_to_cpu(btp->count);
lfloghigh = -1;
}
+
/*
* Find the slot that's first lower than our hash value, -1 if none.
*/
@@ -450,18 +528,13 @@ xfs_dir2_block_getdents(
/*
* If the block number in the offset is out of range, we're done.
*/
- if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk) {
+ if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk)
return 0;
- }
- /*
- * Can't read the block, give up, else get dabuf in bp.
- */
- error = xfs_da_read_buf(NULL, dp, mp->m_dirdatablk, -1,
- &bp, XFS_DATA_FORK);
+
+ error = xfs_dir2_block_read(NULL, dp, &bp);
if (error)
return error;
- ASSERT(bp != NULL);
/*
* Extract the byte offset we start at from the seek pointer.
* We'll skip entries before this.
@@ -637,14 +710,11 @@ xfs_dir2_block_lookup_int(
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
- /*
- * Read the buffer, return error if we can't get it.
- */
- if ((error =
- xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &bp, XFS_DATA_FORK))) {
+
+ error = xfs_dir2_block_read(tp, dp, &bp);
+ if (error)
return error;
- }
- ASSERT(bp != NULL);
+
hdr = bp->b_addr;
xfs_dir2_data_check(dp, bp);
btp = xfs_dir2_block_tail_p(mp, hdr);
@@ -917,10 +987,10 @@ xfs_dir2_leaf_to_block(
/*
* Read the data block if we don't already have it, give up if it fails.
*/
- if (dbp == NULL &&
- (error = xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &dbp,
- XFS_DATA_FORK))) {
- return error;
+ if (!dbp) {
+ error = xfs_dir2_data_read(tp, dp, mp->m_dirdatablk, -1, &dbp);
+ if (error)
+ return error;
}
hdr = dbp->b_addr;
ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC));
@@ -944,6 +1014,7 @@ xfs_dir2_leaf_to_block(
/*
* Start converting it to block form.
*/
+ dbp->b_ops = &xfs_dir2_block_buf_ops;
hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
needlog = 1;
needscan = 0;
@@ -1073,6 +1144,7 @@ xfs_dir2_sf_to_block(
kmem_free(sfp);
return error;
}
+ bp->b_ops = &xfs_dir2_block_buf_ops;
hdr = bp->b_addr;
hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
/*
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c
index 44ffd4d6bc91..ffcf1774152e 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/xfs_dir2_data.c
@@ -34,14 +34,13 @@
STATIC xfs_dir2_data_free_t *
xfs_dir2_data_freefind(xfs_dir2_data_hdr_t *hdr, xfs_dir2_data_unused_t *dup);
-#ifdef DEBUG
/*
* Check the consistency of the data block.
* The input can also be a block-format directory.
- * Pop an assert if we find anything bad.
+ * Return 0 is the buffer is good, otherwise an error.
*/
-void
-xfs_dir2_data_check(
+int
+__xfs_dir2_data_check(
struct xfs_inode *dp, /* incore inode pointer */
struct xfs_buf *bp) /* data block's buffer */
{
@@ -64,18 +63,23 @@ xfs_dir2_data_check(
int stale; /* count of stale leaves */
struct xfs_name name;
- mp = dp->i_mount;
+ mp = bp->b_target->bt_mount;
hdr = bp->b_addr;
bf = hdr->bestfree;
p = (char *)(hdr + 1);
- if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) {
+ switch (hdr->magic) {
+ case cpu_to_be32(XFS_DIR2_BLOCK_MAGIC):
btp = xfs_dir2_block_tail_p(mp, hdr);
lep = xfs_dir2_block_leaf_p(btp);
endp = (char *)lep;
- } else {
- ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC));
+ break;
+ case cpu_to_be32(XFS_DIR2_DATA_MAGIC):
endp = (char *)hdr + mp->m_dirblksize;
+ break;
+ default:
+ XFS_ERROR_REPORT("Bad Magic", XFS_ERRLEVEL_LOW, mp);
+ return EFSCORRUPTED;
}
count = lastfree = freeseen = 0;
@@ -83,19 +87,22 @@ xfs_dir2_data_check(
* Account for zero bestfree entries.
*/
if (!bf[0].length) {
- ASSERT(!bf[0].offset);
+ XFS_WANT_CORRUPTED_RETURN(!bf[0].offset);
freeseen |= 1 << 0;
}
if (!bf[1].length) {
- ASSERT(!bf[1].offset);
+ XFS_WANT_CORRUPTED_RETURN(!bf[1].offset);
freeseen |= 1 << 1;
}
if (!bf[2].length) {
- ASSERT(!bf[2].offset);
+ XFS_WANT_CORRUPTED_RETURN(!bf[2].offset);
freeseen |= 1 << 2;
}
- ASSERT(be16_to_cpu(bf[0].length) >= be16_to_cpu(bf[1].length));
- ASSERT(be16_to_cpu(bf[1].length) >= be16_to_cpu(bf[2].length));
+
+ XFS_WANT_CORRUPTED_RETURN(be16_to_cpu(bf[0].length) >=
+ be16_to_cpu(bf[1].length));
+ XFS_WANT_CORRUPTED_RETURN(be16_to_cpu(bf[1].length) >=
+ be16_to_cpu(bf[2].length));
/*
* Loop over the data/unused entries.
*/
@@ -107,17 +114,20 @@ xfs_dir2_data_check(
* doesn't need to be there.
*/
if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
- ASSERT(lastfree == 0);
- ASSERT(be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)) ==
- (char *)dup - (char *)hdr);
+ XFS_WANT_CORRUPTED_RETURN(lastfree == 0);
+ XFS_WANT_CORRUPTED_RETURN(
+ be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)) ==
+ (char *)dup - (char *)hdr);
dfp = xfs_dir2_data_freefind(hdr, dup);
if (dfp) {
i = (int)(dfp - bf);
- ASSERT((freeseen & (1 << i)) == 0);
+ XFS_WANT_CORRUPTED_RETURN(
+ (freeseen & (1 << i)) == 0);
freeseen |= 1 << i;
} else {
- ASSERT(be16_to_cpu(dup->length) <=
- be16_to_cpu(bf[2].length));
+ XFS_WANT_CORRUPTED_RETURN(
+ be16_to_cpu(dup->length) <=
+ be16_to_cpu(bf[2].length));
}
p += be16_to_cpu(dup->length);
lastfree = 1;
@@ -130,10 +140,12 @@ xfs_dir2_data_check(
* The linear search is crude but this is DEBUG code.
*/
dep = (xfs_dir2_data_entry_t *)p;
- ASSERT(dep->namelen != 0);
- ASSERT(xfs_dir_ino_validate(mp, be64_to_cpu(dep->inumber)) == 0);
- ASSERT(be16_to_cpu(*xfs_dir2_data_entry_tag_p(dep)) ==
- (char *)dep - (char *)hdr);
+ XFS_WANT_CORRUPTED_RETURN(dep->namelen != 0);
+ XFS_WANT_CORRUPTED_RETURN(
+ !xfs_dir_ino_validate(mp, be64_to_cpu(dep->inumber)));
+ XFS_WANT_CORRUPTED_RETURN(
+ be16_to_cpu(*xfs_dir2_data_entry_tag_p(dep)) ==
+ (char *)dep - (char *)hdr);
count++;
lastfree = 0;
if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) {
@@ -148,27 +160,122 @@ xfs_dir2_data_check(
be32_to_cpu(lep[i].hashval) == hash)
break;
}
- ASSERT(i < be32_to_cpu(btp->count));
+ XFS_WANT_CORRUPTED_RETURN(i < be32_to_cpu(btp->count));
}
p += xfs_dir2_data_entsize(dep->namelen);
}
/*
* Need to have seen all the entries and all the bestfree slots.
*/
- ASSERT(freeseen == 7);
+ XFS_WANT_CORRUPTED_RETURN(freeseen == 7);
if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) {
for (i = stale = 0; i < be32_to_cpu(btp->count); i++) {
if (lep[i].address ==
cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
stale++;
if (i > 0)
- ASSERT(be32_to_cpu(lep[i].hashval) >= be32_to_cpu(lep[i - 1].hashval));
+ XFS_WANT_CORRUPTED_RETURN(
+ be32_to_cpu(lep[i].hashval) >=
+ be32_to_cpu(lep[i - 1].hashval));
}
- ASSERT(count == be32_to_cpu(btp->count) - be32_to_cpu(btp->stale));
- ASSERT(stale == be32_to_cpu(btp->stale));
+ XFS_WANT_CORRUPTED_RETURN(count ==
+ be32_to_cpu(btp->count) - be32_to_cpu(btp->stale));
+ XFS_WANT_CORRUPTED_RETURN(stale == be32_to_cpu(btp->stale));
}
+ return 0;
+}
+
+static void
+xfs_dir2_data_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dir2_data_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC);
+ block_ok = block_ok && __xfs_dir2_data_check(NULL, bp) == 0;
+
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+/*
+ * Readahead of the first block of the directory when it is opened is completely
+ * oblivious to the format of the directory. Hence we can either get a block
+ * format buffer or a data format buffer on readahead.
+ */
+static void
+xfs_dir2_data_reada_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dir2_data_hdr *hdr = bp->b_addr;
+
+ switch (hdr->magic) {
+ case cpu_to_be32(XFS_DIR2_BLOCK_MAGIC):
+ bp->b_ops = &xfs_dir2_block_buf_ops;
+ bp->b_ops->verify_read(bp);
+ return;
+ case cpu_to_be32(XFS_DIR2_DATA_MAGIC):
+ xfs_dir2_data_verify(bp);
+ return;
+ default:
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ break;
+ }
+}
+
+static void
+xfs_dir2_data_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_data_verify(bp);
+}
+
+static void
+xfs_dir2_data_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_data_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_dir2_data_buf_ops = {
+ .verify_read = xfs_dir2_data_read_verify,
+ .verify_write = xfs_dir2_data_write_verify,
+};
+
+static const struct xfs_buf_ops xfs_dir2_data_reada_buf_ops = {
+ .verify_read = xfs_dir2_data_reada_verify,
+ .verify_write = xfs_dir2_data_write_verify,
+};
+
+
+int
+xfs_dir2_data_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t bno,
+ xfs_daddr_t mapped_bno,
+ struct xfs_buf **bpp)
+{
+ return xfs_da_read_buf(tp, dp, bno, mapped_bno, bpp,
+ XFS_DATA_FORK, &xfs_dir2_data_buf_ops);
+}
+
+int
+xfs_dir2_data_readahead(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t bno,
+ xfs_daddr_t mapped_bno)
+{
+ return xfs_da_reada_buf(tp, dp, bno, mapped_bno,
+ XFS_DATA_FORK, &xfs_dir2_data_reada_buf_ops);
}
-#endif
/*
* Given a data block and an unused entry from that block,
@@ -409,10 +516,9 @@ xfs_dir2_data_init(
*/
error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, blkno), -1, &bp,
XFS_DATA_FORK);
- if (error) {
+ if (error)
return error;
- }
- ASSERT(bp != NULL);
+ bp->b_ops = &xfs_dir2_data_buf_ops;
/*
* Initialize the header.
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 0b296253bd01..60cd2fa4e047 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -48,6 +48,83 @@ static void xfs_dir2_leaf_log_bests(struct xfs_trans *tp, struct xfs_buf *bp,
int first, int last);
static void xfs_dir2_leaf_log_tail(struct xfs_trans *tp, struct xfs_buf *bp);
+static void
+xfs_dir2_leaf_verify(
+ struct xfs_buf *bp,
+ __be16 magic)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dir2_leaf_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->info.magic == magic;
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_dir2_leaf1_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC));
+}
+
+static void
+xfs_dir2_leaf1_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC));
+}
+
+void
+xfs_dir2_leafn_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
+}
+
+void
+xfs_dir2_leafn_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
+}
+
+static const struct xfs_buf_ops xfs_dir2_leaf1_buf_ops = {
+ .verify_read = xfs_dir2_leaf1_read_verify,
+ .verify_write = xfs_dir2_leaf1_write_verify,
+};
+
+const struct xfs_buf_ops xfs_dir2_leafn_buf_ops = {
+ .verify_read = xfs_dir2_leafn_read_verify,
+ .verify_write = xfs_dir2_leafn_write_verify,
+};
+
+static int
+xfs_dir2_leaf_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t fbno,
+ xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp)
+{
+ return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
+ XFS_DATA_FORK, &xfs_dir2_leaf1_buf_ops);
+}
+
+int
+xfs_dir2_leafn_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t fbno,
+ xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp)
+{
+ return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
+ XFS_DATA_FORK, &xfs_dir2_leafn_buf_ops);
+}
/*
* Convert a block form directory to a leaf form directory.
@@ -125,6 +202,7 @@ xfs_dir2_block_to_leaf(
/*
* Fix up the block header, make it a data block.
*/
+ dbp->b_ops = &xfs_dir2_data_buf_ops;
hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC);
if (needscan)
xfs_dir2_data_freescan(mp, hdr, &needlog);
@@ -311,15 +389,11 @@ xfs_dir2_leaf_addname(
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
- /*
- * Read the leaf block.
- */
- error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp,
- XFS_DATA_FORK);
- if (error) {
+
+ error = xfs_dir2_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp);
+ if (error)
return error;
- }
- ASSERT(lbp != NULL);
+
/*
* Look up the entry by hash value and name.
* We know it's not there, our caller has already done a lookup.
@@ -494,22 +568,21 @@ xfs_dir2_leaf_addname(
hdr = dbp->b_addr;
bestsp[use_block] = hdr->bestfree[0].length;
grown = 1;
- }
- /*
- * Already had space in some data block.
- * Just read that one in.
- */
- else {
- if ((error =
- xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, use_block),
- -1, &dbp, XFS_DATA_FORK))) {
+ } else {
+ /*
+ * Already had space in some data block.
+ * Just read that one in.
+ */
+ error = xfs_dir2_data_read(tp, dp,
+ xfs_dir2_db_to_da(mp, use_block),
+ -1, &dbp);
+ if (error) {
xfs_trans_brelse(tp, lbp);
return error;
}
hdr = dbp->b_addr;
grown = 0;
}
- xfs_dir2_data_check(dp, dbp);
/*
* Point to the biggest freespace in our data block.
*/
@@ -892,10 +965,9 @@ xfs_dir2_leaf_readbuf(
* Read the directory block starting at the first mapping.
*/
mip->curdb = xfs_dir2_da_to_db(mp, map->br_startoff);
- error = xfs_da_read_buf(NULL, dp, map->br_startoff,
+ error = xfs_dir2_data_read(NULL, dp, map->br_startoff,
map->br_blockcount >= mp->m_dirblkfsbs ?
- XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1,
- &bp, XFS_DATA_FORK);
+ XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1, &bp);
/*
* Should just skip over the data block instead of giving up.
@@ -922,11 +994,11 @@ xfs_dir2_leaf_readbuf(
*/
if (i > mip->ra_current &&
map[mip->ra_index].br_blockcount >= mp->m_dirblkfsbs) {
- xfs_buf_readahead(mp->m_ddev_targp,
+ xfs_dir2_data_readahead(NULL, dp,
+ map[mip->ra_index].br_startoff + mip->ra_offset,
XFS_FSB_TO_DADDR(mp,
map[mip->ra_index].br_startblock +
- mip->ra_offset),
- (int)BTOBB(mp->m_dirblksize));
+ mip->ra_offset));
mip->ra_current = i;
}
@@ -935,10 +1007,9 @@ xfs_dir2_leaf_readbuf(
* use our mapping, but this is a very rare case.
*/
else if (i > mip->ra_current) {
- xfs_da_reada_buf(NULL, dp,
+ xfs_dir2_data_readahead(NULL, dp,
map[mip->ra_index].br_startoff +
- mip->ra_offset,
- XFS_DATA_FORK);
+ mip->ra_offset, -1);
mip->ra_current = i;
}
@@ -1177,15 +1248,14 @@ xfs_dir2_leaf_init(
* Get the buffer for the block.
*/
error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp,
- XFS_DATA_FORK);
- if (error) {
+ XFS_DATA_FORK);
+ if (error)
return error;
- }
- ASSERT(bp != NULL);
- leaf = bp->b_addr;
+
/*
* Initialize the header.
*/
+ leaf = bp->b_addr;
leaf->hdr.info.magic = cpu_to_be16(magic);
leaf->hdr.info.forw = 0;
leaf->hdr.info.back = 0;
@@ -1198,10 +1268,12 @@ xfs_dir2_leaf_init(
* the block.
*/
if (magic == XFS_DIR2_LEAF1_MAGIC) {
+ bp->b_ops = &xfs_dir2_leaf1_buf_ops;
ltp = xfs_dir2_leaf_tail_p(mp, leaf);
ltp->bestcount = 0;
xfs_dir2_leaf_log_tail(tp, bp);
- }
+ } else
+ bp->b_ops = &xfs_dir2_leafn_buf_ops;
*bpp = bp;
return 0;
}
@@ -1372,13 +1444,11 @@ xfs_dir2_leaf_lookup_int(
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
- /*
- * Read the leaf block into the buffer.
- */
- error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp,
- XFS_DATA_FORK);
+
+ error = xfs_dir2_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp);
if (error)
return error;
+
*lbpp = lbp;
leaf = lbp->b_addr;
xfs_dir2_leaf_check(dp, lbp);
@@ -1409,14 +1479,13 @@ xfs_dir2_leaf_lookup_int(
if (newdb != curdb) {
if (dbp)
xfs_trans_brelse(tp, dbp);
- error = xfs_da_read_buf(tp, dp,
- xfs_dir2_db_to_da(mp, newdb),
- -1, &dbp, XFS_DATA_FORK);
+ error = xfs_dir2_data_read(tp, dp,
+ xfs_dir2_db_to_da(mp, newdb),
+ -1, &dbp);
if (error) {
xfs_trans_brelse(tp, lbp);
return error;
}
- xfs_dir2_data_check(dp, dbp);
curdb = newdb;
}
/*
@@ -1451,9 +1520,9 @@ xfs_dir2_leaf_lookup_int(
ASSERT(cidb != -1);
if (cidb != curdb) {
xfs_trans_brelse(tp, dbp);
- error = xfs_da_read_buf(tp, dp,
- xfs_dir2_db_to_da(mp, cidb),
- -1, &dbp, XFS_DATA_FORK);
+ error = xfs_dir2_data_read(tp, dp,
+ xfs_dir2_db_to_da(mp, cidb),
+ -1, &dbp);
if (error) {
xfs_trans_brelse(tp, lbp);
return error;
@@ -1738,10 +1807,9 @@ xfs_dir2_leaf_trim_data(
/*
* Read the offending data block. We need its buffer.
*/
- if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp,
- XFS_DATA_FORK))) {
+ error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp);
+ if (error)
return error;
- }
leaf = lbp->b_addr;
ltp = xfs_dir2_leaf_tail_p(mp, leaf);
@@ -1864,10 +1932,9 @@ xfs_dir2_node_to_leaf(
/*
* Read the freespace block.
*/
- if ((error = xfs_da_read_buf(tp, dp, mp->m_dirfreeblk, -1, &fbp,
- XFS_DATA_FORK))) {
+ error = xfs_dir2_free_read(tp, dp, mp->m_dirfreeblk, &fbp);
+ if (error)
return error;
- }
free = fbp->b_addr;
ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC));
ASSERT(!free->hdr.firstdb);
@@ -1890,7 +1957,10 @@ xfs_dir2_node_to_leaf(
xfs_dir2_leaf_compact(args, lbp);
else
xfs_dir2_leaf_log_header(tp, lbp);
+
+ lbp->b_ops = &xfs_dir2_leaf1_buf_ops;
leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAF1_MAGIC);
+
/*
* Set up the leaf tail from the freespace block.
*/
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index 6c7052406605..5980f9b7fa9b 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -55,6 +55,74 @@ static int xfs_dir2_leafn_remove(xfs_da_args_t *args, struct xfs_buf *bp,
static int xfs_dir2_node_addname_int(xfs_da_args_t *args,
xfs_da_state_blk_t *fblk);
+static void
+xfs_dir2_free_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dir2_free_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC);
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR("xfs_dir2_free_verify magic",
+ XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_dir2_free_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_free_verify(bp);
+}
+
+static void
+xfs_dir2_free_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dir2_free_verify(bp);
+}
+
+static const struct xfs_buf_ops xfs_dir2_free_buf_ops = {
+ .verify_read = xfs_dir2_free_read_verify,
+ .verify_write = xfs_dir2_free_write_verify,
+};
+
+
+static int
+__xfs_dir2_free_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t fbno,
+ xfs_daddr_t mappedbno,
+ struct xfs_buf **bpp)
+{
+ return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
+ XFS_DATA_FORK, &xfs_dir2_free_buf_ops);
+}
+
+int
+xfs_dir2_free_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t fbno,
+ struct xfs_buf **bpp)
+{
+ return __xfs_dir2_free_read(tp, dp, fbno, -1, bpp);
+}
+
+static int
+xfs_dir2_free_try_read(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp,
+ xfs_dablk_t fbno,
+ struct xfs_buf **bpp)
+{
+ return __xfs_dir2_free_read(tp, dp, fbno, -2, bpp);
+}
+
/*
* Log entries from a freespace block.
*/
@@ -131,11 +199,12 @@ xfs_dir2_leaf_to_node(
/*
* Get the buffer for the new freespace block.
*/
- if ((error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp,
- XFS_DATA_FORK))) {
+ error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp,
+ XFS_DATA_FORK);
+ if (error)
return error;
- }
- ASSERT(fbp != NULL);
+ fbp->b_ops = &xfs_dir2_free_buf_ops;
+
free = fbp->b_addr;
leaf = lbp->b_addr;
ltp = xfs_dir2_leaf_tail_p(mp, leaf);
@@ -157,7 +226,10 @@ xfs_dir2_leaf_to_node(
*to = cpu_to_be16(off);
}
free->hdr.nused = cpu_to_be32(n);
+
+ lbp->b_ops = &xfs_dir2_leafn_buf_ops;
leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
+
/*
* Log everything.
*/
@@ -394,12 +466,10 @@ xfs_dir2_leafn_lookup_for_addname(
*/
if (curbp)
xfs_trans_brelse(tp, curbp);
- /*
- * Read the free block.
- */
- error = xfs_da_read_buf(tp, dp,
+
+ error = xfs_dir2_free_read(tp, dp,
xfs_dir2_db_to_da(mp, newfdb),
- -1, &curbp, XFS_DATA_FORK);
+ &curbp);
if (error)
return error;
free = curbp->b_addr;
@@ -534,9 +604,9 @@ xfs_dir2_leafn_lookup_for_entry(
ASSERT(state->extravalid);
curbp = state->extrablk.bp;
} else {
- error = xfs_da_read_buf(tp, dp,
+ error = xfs_dir2_data_read(tp, dp,
xfs_dir2_db_to_da(mp, newdb),
- -1, &curbp, XFS_DATA_FORK);
+ -1, &curbp);
if (error)
return error;
}
@@ -568,6 +638,7 @@ xfs_dir2_leafn_lookup_for_entry(
state->extrablk.index = (int)((char *)dep -
(char *)curbp->b_addr);
state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
+ curbp->b_ops = &xfs_dir2_data_buf_ops;
if (cmp == XFS_CMP_EXACT)
return XFS_ERROR(EEXIST);
}
@@ -582,6 +653,7 @@ xfs_dir2_leafn_lookup_for_entry(
state->extrablk.index = -1;
state->extrablk.blkno = curdb;
state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
+ curbp->b_ops = &xfs_dir2_data_buf_ops;
} else {
/* If the curbp is not the CI match block, drop it */
if (state->extrablk.bp != curbp)
@@ -825,6 +897,77 @@ xfs_dir2_leafn_rebalance(
}
}
+static int
+xfs_dir2_data_block_free(
+ xfs_da_args_t *args,
+ struct xfs_dir2_data_hdr *hdr,
+ struct xfs_dir2_free *free,
+ xfs_dir2_db_t fdb,
+ int findex,
+ struct xfs_buf *fbp,
+ int longest)
+{
+ struct xfs_trans *tp = args->trans;
+ int logfree = 0;
+
+ if (!hdr) {
+ /* One less used entry in the free table. */
+ be32_add_cpu(&free->hdr.nused, -1);
+ xfs_dir2_free_log_header(tp, fbp);
+
+ /*
+ * If this was the last entry in the table, we can trim the
+ * table size back. There might be other entries at the end
+ * referring to non-existent data blocks, get those too.
+ */
+ if (findex == be32_to_cpu(free->hdr.nvalid) - 1) {
+ int i; /* free entry index */
+
+ for (i = findex - 1; i >= 0; i--) {
+ if (free->bests[i] != cpu_to_be16(NULLDATAOFF))
+ break;
+ }
+ free->hdr.nvalid = cpu_to_be32(i + 1);
+ logfree = 0;
+ } else {
+ /* Not the last entry, just punch it out. */
+ free->bests[findex] = cpu_to_be16(NULLDATAOFF);
+ logfree = 1;
+ }
+ /*
+ * If there are no useful entries left in the block,
+ * get rid of the block if we can.
+ */
+ if (!free->hdr.nused) {
+ int error;
+
+ error = xfs_dir2_shrink_inode(args, fdb, fbp);
+ if (error == 0) {
+ fbp = NULL;
+ logfree = 0;
+ } else if (error != ENOSPC || args->total != 0)
+ return error;
+ /*
+ * It's possible to get ENOSPC if there is no
+ * space reservation. In this case some one
+ * else will eventually get rid of this block.
+ */
+ }
+ } else {
+ /*
+ * Data block is not empty, just set the free entry to the new
+ * value.
+ */
+ free->bests[findex] = cpu_to_be16(longest);
+ logfree = 1;
+ }
+
+ /* Log the free entry that changed, unless we got rid of it. */
+ if (logfree)
+ xfs_dir2_free_log_bests(tp, fbp, findex, findex);
+ return 0;
+}
+
/*
* Remove an entry from a node directory.
* This removes the leaf entry and the data entry,
@@ -908,17 +1051,16 @@ xfs_dir2_leafn_remove(
xfs_dir2_db_t fdb; /* freeblock block number */
int findex; /* index in freeblock entries */
xfs_dir2_free_t *free; /* freeblock structure */
- int logfree; /* need to log free entry */
/*
* Convert the data block number to a free block,
* read in the free block.
*/
fdb = xfs_dir2_db_to_fdb(mp, db);
- if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb),
- -1, &fbp, XFS_DATA_FORK))) {
+ error = xfs_dir2_free_read(tp, dp, xfs_dir2_db_to_da(mp, fdb),
+ &fbp);
+ if (error)
return error;
- }
free = fbp->b_addr;
ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC));
ASSERT(be32_to_cpu(free->hdr.firstdb) ==
@@ -954,68 +1096,12 @@ xfs_dir2_leafn_remove(
* If we got rid of the data block, we can eliminate that entry
* in the free block.
*/
- if (hdr == NULL) {
- /*
- * One less used entry in the free table.
- */
- be32_add_cpu(&free->hdr.nused, -1);
- xfs_dir2_free_log_header(tp, fbp);
- /*
- * If this was the last entry in the table, we can
- * trim the table size back. There might be other
- * entries at the end referring to non-existent
- * data blocks, get those too.
- */
- if (findex == be32_to_cpu(free->hdr.nvalid) - 1) {
- int i; /* free entry index */
-
- for (i = findex - 1;
- i >= 0 &&
- free->bests[i] == cpu_to_be16(NULLDATAOFF);
- i--)
- continue;
- free->hdr.nvalid = cpu_to_be32(i + 1);
- logfree = 0;
- }
- /*
- * Not the last entry, just punch it out.
- */
- else {
- free->bests[findex] = cpu_to_be16(NULLDATAOFF);
- logfree = 1;
- }
- /*
- * If there are no useful entries left in the block,
- * get rid of the block if we can.
- */
- if (!free->hdr.nused) {
- error = xfs_dir2_shrink_inode(args, fdb, fbp);
- if (error == 0) {
- fbp = NULL;
- logfree = 0;
- } else if (error != ENOSPC || args->total != 0)
- return error;
- /*
- * It's possible to get ENOSPC if there is no
- * space reservation. In this case some one
- * else will eventually get rid of this block.
- */
- }
- }
- /*
- * Data block is not empty, just set the free entry to
- * the new value.
- */
- else {
- free->bests[findex] = cpu_to_be16(longest);
- logfree = 1;
- }
- /*
- * Log the free entry that changed, unless we got rid of it.
- */
- if (logfree)
- xfs_dir2_free_log_bests(tp, fbp, findex, findex);
+ error = xfs_dir2_data_block_free(args, hdr, free,
+ fdb, findex, fbp, longest);
+ if (error)
+ return error;
}
+
xfs_dir2_leafn_check(dp, bp);
/*
* Return indication of whether this leaf block is empty enough
@@ -1169,12 +1255,11 @@ xfs_dir2_leafn_toosmall(
/*
* Read the sibling leaf block.
*/
- if ((error =
- xfs_da_read_buf(state->args->trans, state->args->dp, blkno,
- -1, &bp, XFS_DATA_FORK))) {
+ error = xfs_dir2_leafn_read(state->args->trans, state->args->dp,
+ blkno, -1, &bp);
+ if (error)
return error;
- }
- ASSERT(bp != NULL);
+
/*
* Count bytes in the two blocks combined.
*/
@@ -1454,14 +1539,13 @@ xfs_dir2_node_addname_int(
* This should be really rare, so there's no reason
* to avoid it.
*/
- if ((error = xfs_da_read_buf(tp, dp,
- xfs_dir2_db_to_da(mp, fbno), -2, &fbp,
- XFS_DATA_FORK))) {
+ error = xfs_dir2_free_try_read(tp, dp,
+ xfs_dir2_db_to_da(mp, fbno),
+ &fbp);
+ if (error)
return error;
- }
- if (unlikely(fbp == NULL)) {
+ if (!fbp)
continue;
- }
free = fbp->b_addr;
ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC));
findex = 0;
@@ -1520,9 +1604,10 @@ xfs_dir2_node_addname_int(
* that was just allocated.
*/
fbno = xfs_dir2_db_to_fdb(mp, dbno);
- if (unlikely(error = xfs_da_read_buf(tp, dp,
- xfs_dir2_db_to_da(mp, fbno), -2, &fbp,
- XFS_DATA_FORK)))
+ error = xfs_dir2_free_try_read(tp, dp,
+ xfs_dir2_db_to_da(mp, fbno),
+ &fbp);
+ if (error)
return error;
/*
@@ -1561,12 +1646,12 @@ xfs_dir2_node_addname_int(
/*
* Get a buffer for the new block.
*/
- if ((error = xfs_da_get_buf(tp, dp,
- xfs_dir2_db_to_da(mp, fbno),
- -1, &fbp, XFS_DATA_FORK))) {
+ error = xfs_da_get_buf(tp, dp,
+ xfs_dir2_db_to_da(mp, fbno),
+ -1, &fbp, XFS_DATA_FORK);
+ if (error)
return error;
- }
- ASSERT(fbp != NULL);
+ fbp->b_ops = &xfs_dir2_free_buf_ops;
/*
* Initialize the new block to be empty, and remember
@@ -1630,8 +1715,8 @@ xfs_dir2_node_addname_int(
/*
* Read the data block in.
*/
- error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, dbno),
- -1, &dbp, XFS_DATA_FORK);
+ error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, dbno),
+ -1, &dbp);
if (error)
return error;
hdr = dbp->b_addr;
@@ -1917,18 +2002,15 @@ xfs_dir2_node_trim_free(
/*
* Read the freespace block.
*/
- if (unlikely(error = xfs_da_read_buf(tp, dp, (xfs_dablk_t)fo, -2, &bp,
- XFS_DATA_FORK))) {
+ error = xfs_dir2_free_try_read(tp, dp, fo, &bp);
+ if (error)
return error;
- }
-
/*
* There can be holes in freespace. If fo is a hole, there's
* nothing to do.
*/
- if (bp == NULL) {
+ if (!bp)
return 0;
- }
free = bp->b_addr;
ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC));
/*
diff --git a/fs/xfs/xfs_dir2_priv.h b/fs/xfs/xfs_dir2_priv.h
index 3523d3e15aa8..7da79f6515fd 100644
--- a/fs/xfs/xfs_dir2_priv.h
+++ b/fs/xfs/xfs_dir2_priv.h
@@ -30,6 +30,8 @@ extern int xfs_dir_cilookup_result(struct xfs_da_args *args,
const unsigned char *name, int len);
/* xfs_dir2_block.c */
+extern const struct xfs_buf_ops xfs_dir2_block_buf_ops;
+
extern int xfs_dir2_block_addname(struct xfs_da_args *args);
extern int xfs_dir2_block_getdents(struct xfs_inode *dp, void *dirent,
xfs_off_t *offset, filldir_t filldir);
@@ -41,10 +43,19 @@ extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
/* xfs_dir2_data.c */
#ifdef DEBUG
-extern void xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_buf *bp);
+#define xfs_dir2_data_check(dp,bp) __xfs_dir2_data_check(dp, bp);
#else
#define xfs_dir2_data_check(dp,bp)
#endif
+
+extern const struct xfs_buf_ops xfs_dir2_data_buf_ops;
+
+extern int __xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_buf *bp);
+extern int xfs_dir2_data_read(struct xfs_trans *tp, struct xfs_inode *dp,
+ xfs_dablk_t bno, xfs_daddr_t mapped_bno, struct xfs_buf **bpp);
+extern int xfs_dir2_data_readahead(struct xfs_trans *tp, struct xfs_inode *dp,
+ xfs_dablk_t bno, xfs_daddr_t mapped_bno);
+
extern struct xfs_dir2_data_free *
xfs_dir2_data_freeinsert(struct xfs_dir2_data_hdr *hdr,
struct xfs_dir2_data_unused *dup, int *loghead);
@@ -66,6 +77,10 @@ extern void xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_buf *bp,
xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp);
/* xfs_dir2_leaf.c */
+extern const struct xfs_buf_ops xfs_dir2_leafn_buf_ops;
+
+extern int xfs_dir2_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp,
+ xfs_dablk_t fbno, xfs_daddr_t mappedbno, struct xfs_buf **bpp);
extern int xfs_dir2_block_to_leaf(struct xfs_da_args *args,
struct xfs_buf *dbp);
extern int xfs_dir2_leaf_addname(struct xfs_da_args *args);
@@ -115,6 +130,8 @@ extern int xfs_dir2_node_removename(struct xfs_da_args *args);
extern int xfs_dir2_node_replace(struct xfs_da_args *args);
extern int xfs_dir2_node_trim_free(struct xfs_da_args *args, xfs_fileoff_t fo,
int *rvalp);
+extern int xfs_dir2_free_read(struct xfs_trans *tp, struct xfs_inode *dp,
+ xfs_dablk_t fbno, struct xfs_buf **bpp);
/* xfs_dir2_sf.c */
extern xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *sfp);
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index bf27fcca4843..9e1bf5294c91 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -248,7 +248,59 @@ xfs_qm_init_dquot_blk(
xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1);
}
+static void
+xfs_dquot_buf_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr;
+ struct xfs_disk_dquot *ddq;
+ xfs_dqid_t id = 0;
+ int i;
+
+ /*
+ * On the first read of the buffer, verify that each dquot is valid.
+ * We don't know what the id of the dquot is supposed to be, just that
+ * they should be increasing monotonically within the buffer. If the
+ * first id is corrupt, then it will fail on the second dquot in the
+ * buffer so corruptions could point to the wrong dquot in this case.
+ */
+ for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) {
+ int error;
+
+ ddq = &d[i].dd_diskdq;
+
+ if (i == 0)
+ id = be32_to_cpu(ddq->d_id);
+
+ error = xfs_qm_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN,
+ "xfs_dquot_read_verify");
+ if (error) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, d);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ break;
+ }
+ }
+}
+
+static void
+xfs_dquot_buf_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dquot_buf_verify(bp);
+}
+
+void
+xfs_dquot_buf_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dquot_buf_verify(bp);
+}
+const struct xfs_buf_ops xfs_dquot_buf_ops = {
+ .verify_read = xfs_dquot_buf_read_verify,
+ .verify_write = xfs_dquot_buf_write_verify,
+};
/*
* Allocate a block and fill it with dquots.
@@ -315,6 +367,7 @@ xfs_qm_dqalloc(
error = xfs_buf_geterror(bp);
if (error)
goto error1;
+ bp->b_ops = &xfs_dquot_buf_ops;
/*
* Make a chunk of dquots out of this buffer and log
@@ -359,6 +412,51 @@ xfs_qm_dqalloc(
return (error);
}
+STATIC int
+xfs_qm_dqrepair(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ struct xfs_dquot *dqp,
+ xfs_dqid_t firstid,
+ struct xfs_buf **bpp)
+{
+ int error;
+ struct xfs_disk_dquot *ddq;
+ struct xfs_dqblk *d;
+ int i;
+
+ /*
+ * Read the buffer without verification so we get the corrupted
+ * buffer returned to us. make sure we verify it on write, though.
+ */
+ error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno,
+ mp->m_quotainfo->qi_dqchunklen,
+ 0, bpp, NULL);
+
+ if (error) {
+ ASSERT(*bpp == NULL);
+ return XFS_ERROR(error);
+ }
+ (*bpp)->b_ops = &xfs_dquot_buf_ops;
+
+ ASSERT(xfs_buf_islocked(*bpp));
+ d = (struct xfs_dqblk *)(*bpp)->b_addr;
+
+ /* Do the actual repair of dquots in this buffer */
+ for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) {
+ ddq = &d[i].dd_diskdq;
+ error = xfs_qm_dqcheck(mp, ddq, firstid + i,
+ dqp->dq_flags & XFS_DQ_ALLTYPES,
+ XFS_QMOPT_DQREPAIR, "xfs_qm_dqrepair");
+ if (error) {
+ /* repair failed, we're screwed */
+ xfs_trans_brelse(tp, *bpp);
+ return XFS_ERROR(EIO);
+ }
+ }
+
+ return 0;
+}
/*
* Maps a dquot to the buffer containing its on-disk version.
@@ -378,7 +476,6 @@ xfs_qm_dqtobp(
xfs_buf_t *bp;
xfs_inode_t *quotip = XFS_DQ_TO_QIP(dqp);
xfs_mount_t *mp = dqp->q_mount;
- xfs_disk_dquot_t *ddq;
xfs_dqid_t id = be32_to_cpu(dqp->q_core.d_id);
xfs_trans_t *tp = (tpp ? *tpp : NULL);
@@ -439,33 +536,24 @@ xfs_qm_dqtobp(
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
dqp->q_blkno,
mp->m_quotainfo->qi_dqchunklen,
- 0, &bp);
- if (error || !bp)
- return XFS_ERROR(error);
- }
-
- ASSERT(xfs_buf_islocked(bp));
+ 0, &bp, &xfs_dquot_buf_ops);
- /*
- * calculate the location of the dquot inside the buffer.
- */
- ddq = bp->b_addr + dqp->q_bufoffset;
+ if (error == EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) {
+ xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff *
+ mp->m_quotainfo->qi_dqperchunk;
+ ASSERT(bp == NULL);
+ error = xfs_qm_dqrepair(mp, tp, dqp, firstid, &bp);
+ }
- /*
- * A simple sanity check in case we got a corrupted dquot...
- */
- error = xfs_qm_dqcheck(mp, ddq, id, dqp->dq_flags & XFS_DQ_ALLTYPES,
- flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN),
- "dqtobp");
- if (error) {
- if (!(flags & XFS_QMOPT_DQREPAIR)) {
- xfs_trans_brelse(tp, bp);
- return XFS_ERROR(EIO);
+ if (error) {
+ ASSERT(bp == NULL);
+ return XFS_ERROR(error);
}
}
+ ASSERT(xfs_buf_islocked(bp));
*O_bpp = bp;
- *O_ddpp = ddq;
+ *O_ddpp = bp->b_addr + dqp->q_bufoffset;
return (0);
}
@@ -920,7 +1008,7 @@ xfs_qm_dqflush(
* Get the buffer containing the on-disk dquot
*/
error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno,
- mp->m_quotainfo->qi_dqchunklen, 0, &bp);
+ mp->m_quotainfo->qi_dqchunklen, 0, &bp, NULL);
if (error)
goto out_unlock;
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 7d20af27346d..c694a8469c4a 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -161,4 +161,6 @@ static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp)
return dqp;
}
+extern const struct xfs_buf_ops xfs_dquot_buf_ops;
+
#endif /* __XFS_DQUOT_H__ */
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 8c6d1d70278c..a83611849cee 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -29,6 +29,7 @@
#include "xfs_inode.h"
#include "xfs_inode_item.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
/*
* Note that we only accept fileids which are long enough rather than allow
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index aa473fa640a2..67284edb84d7 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -31,6 +31,8 @@
#include "xfs_error.h"
#include "xfs_vnodeops.h"
#include "xfs_da_btree.h"
+#include "xfs_dir2_format.h"
+#include "xfs_dir2_priv.h"
#include "xfs_ioctl.h"
#include "xfs_trace.h"
@@ -84,7 +86,7 @@ xfs_rw_ilock_demote(
* valid before the operation, it will be read from disk before
* being partially zeroed.
*/
-STATIC int
+int
xfs_iozero(
struct xfs_inode *ip, /* inode */
loff_t pos, /* offset in file */
@@ -255,15 +257,14 @@ xfs_file_aio_read(
xfs_buftarg_t *target =
XFS_IS_REALTIME_INODE(ip) ?
mp->m_rtdev_targp : mp->m_ddev_targp;
- if ((iocb->ki_pos & target->bt_smask) ||
- (size & target->bt_smask)) {
- if (iocb->ki_pos == i_size_read(inode))
+ if ((pos & target->bt_smask) || (size & target->bt_smask)) {
+ if (pos == i_size_read(inode))
return 0;
return -XFS_ERROR(EINVAL);
}
}
- n = mp->m_super->s_maxbytes - iocb->ki_pos;
+ n = mp->m_super->s_maxbytes - pos;
if (n <= 0 || size == 0)
return 0;
@@ -289,20 +290,21 @@ xfs_file_aio_read(
xfs_rw_ilock(ip, XFS_IOLOCK_EXCL);
if (inode->i_mapping->nrpages) {
- ret = -xfs_flushinval_pages(ip,
- (iocb->ki_pos & PAGE_CACHE_MASK),
- -1, FI_REMAPF_LOCKED);
+ ret = -filemap_write_and_wait_range(
+ VFS_I(ip)->i_mapping,
+ pos, -1);
if (ret) {
xfs_rw_iunlock(ip, XFS_IOLOCK_EXCL);
return ret;
}
+ truncate_pagecache_range(VFS_I(ip), pos, -1);
}
xfs_rw_ilock_demote(ip, XFS_IOLOCK_EXCL);
}
- trace_xfs_file_read(ip, size, iocb->ki_pos, ioflags);
+ trace_xfs_file_read(ip, size, pos, ioflags);
- ret = generic_file_aio_read(iocb, iovp, nr_segs, iocb->ki_pos);
+ ret = generic_file_aio_read(iocb, iovp, nr_segs, pos);
if (ret > 0)
XFS_STATS_ADD(xs_read_bytes, ret);
@@ -670,10 +672,11 @@ xfs_file_dio_aio_write(
goto out;
if (mapping->nrpages) {
- ret = -xfs_flushinval_pages(ip, (pos & PAGE_CACHE_MASK), -1,
- FI_REMAPF_LOCKED);
+ ret = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
+ pos, -1);
if (ret)
goto out;
+ truncate_pagecache_range(VFS_I(ip), pos, -1);
}
/*
@@ -728,16 +731,17 @@ xfs_file_buffered_aio_write(
write_retry:
trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0);
ret = generic_file_buffered_write(iocb, iovp, nr_segs,
- pos, &iocb->ki_pos, count, ret);
+ pos, &iocb->ki_pos, count, 0);
+
/*
- * if we just got an ENOSPC, flush the inode now we aren't holding any
- * page locks and retry *once*
+ * If we just got an ENOSPC, try to write back all dirty inodes to
+ * convert delalloc space to free up some of the excess reserved
+ * metadata space.
*/
if (ret == -ENOSPC && !enospc) {
enospc = 1;
- ret = -xfs_flush_pages(ip, 0, -1, 0, FI_NONE);
- if (!ret)
- goto write_retry;
+ xfs_flush_inodes(ip->i_mount);
+ goto write_retry;
}
current->backing_dev_info = NULL;
@@ -889,7 +893,7 @@ xfs_dir_open(
*/
mode = xfs_ilock_map_shared(ip);
if (ip->i_d.di_nextents > 0)
- xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK);
+ xfs_dir2_data_readahead(NULL, ip, 0, -1);
xfs_iunlock(ip, mode);
return 0;
}
diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index c13fed8c394a..6dda3f949b04 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -233,7 +233,8 @@ typedef struct xfs_fsop_resblks {
#define XFS_FSOP_GEOM_FLAGS_LOGV2 0x0100 /* log format version 2 */
#define XFS_FSOP_GEOM_FLAGS_SECTOR 0x0200 /* sector sizes >1BB */
#define XFS_FSOP_GEOM_FLAGS_ATTR2 0x0400 /* inline attributes rework */
-#define XFS_FSOP_GEOM_FLAGS_DIRV2CI 0x1000 /* ASCII only CI names */
+#define XFS_FSOP_GEOM_FLAGS_PROJID32 0x0800 /* 32-bit project IDs */
+#define XFS_FSOP_GEOM_FLAGS_DIRV2CI 0x1000 /* ASCII only CI names */
#define XFS_FSOP_GEOM_FLAGS_LAZYSB 0x4000 /* lazy superblock counters */
@@ -339,6 +340,35 @@ typedef struct xfs_error_injection {
/*
+ * Speculative preallocation trimming.
+ */
+#define XFS_EOFBLOCKS_VERSION 1
+struct xfs_eofblocks {
+ __u32 eof_version;
+ __u32 eof_flags;
+ uid_t eof_uid;
+ gid_t eof_gid;
+ prid_t eof_prid;
+ __u32 pad32;
+ __u64 eof_min_file_size;
+ __u64 pad64[12];
+};
+
+/* eof_flags values */
+#define XFS_EOF_FLAGS_SYNC (1 << 0) /* sync/wait mode scan */
+#define XFS_EOF_FLAGS_UID (1 << 1) /* filter by uid */
+#define XFS_EOF_FLAGS_GID (1 << 2) /* filter by gid */
+#define XFS_EOF_FLAGS_PRID (1 << 3) /* filter by project id */
+#define XFS_EOF_FLAGS_MINFILESIZE (1 << 4) /* filter by min file size */
+#define XFS_EOF_FLAGS_VALID \
+ (XFS_EOF_FLAGS_SYNC | \
+ XFS_EOF_FLAGS_UID | \
+ XFS_EOF_FLAGS_GID | \
+ XFS_EOF_FLAGS_PRID | \
+ XFS_EOF_FLAGS_MINFILESIZE)
+
+
+/*
* The user-level Handle Request interface structure.
*/
typedef struct xfs_fsop_handlereq {
@@ -456,6 +486,7 @@ typedef struct xfs_handle {
/* XFS_IOC_GETBIOSIZE ---- deprecated 47 */
#define XFS_IOC_GETBMAPX _IOWR('X', 56, struct getbmap)
#define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64)
+#define XFS_IOC_FREE_EOFBLOCKS _IOR ('X', 58, struct xfs_eofblocks)
/*
* ioctl commands that replace IRIX syssgi()'s
diff --git a/fs/xfs/xfs_fs_subr.c b/fs/xfs/xfs_fs_subr.c
deleted file mode 100644
index 652b875a9d4c..000000000000
--- a/fs/xfs/xfs_fs_subr.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (c) 2000-2002,2005-2006 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include "xfs.h"
-#include "xfs_vnodeops.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_inode.h"
-#include "xfs_trace.h"
-
-/*
- * note: all filemap functions return negative error codes. These
- * need to be inverted before returning to the xfs core functions.
- */
-void
-xfs_tosspages(
- xfs_inode_t *ip,
- xfs_off_t first,
- xfs_off_t last,
- int fiopt)
-{
- /* can't toss partial tail pages, so mask them out */
- last &= ~(PAGE_SIZE - 1);
- truncate_inode_pages_range(VFS_I(ip)->i_mapping, first, last - 1);
-}
-
-int
-xfs_flushinval_pages(
- xfs_inode_t *ip,
- xfs_off_t first,
- xfs_off_t last,
- int fiopt)
-{
- struct address_space *mapping = VFS_I(ip)->i_mapping;
- int ret = 0;
-
- trace_xfs_pagecache_inval(ip, first, last);
-
- xfs_iflags_clear(ip, XFS_ITRUNCATED);
- ret = filemap_write_and_wait_range(mapping, first,
- last == -1 ? LLONG_MAX : last);
- if (!ret)
- truncate_inode_pages_range(mapping, first, last);
- return -ret;
-}
-
-int
-xfs_flush_pages(
- xfs_inode_t *ip,
- xfs_off_t first,
- xfs_off_t last,
- uint64_t flags,
- int fiopt)
-{
- struct address_space *mapping = VFS_I(ip)->i_mapping;
- int ret = 0;
- int ret2;
-
- xfs_iflags_clear(ip, XFS_ITRUNCATED);
- ret = -filemap_fdatawrite_range(mapping, first,
- last == -1 ? LLONG_MAX : last);
- if (flags & XBF_ASYNC)
- return ret;
- ret2 = xfs_wait_on_pages(ip, first, last);
- if (!ret)
- ret = ret2;
- return ret;
-}
-
-int
-xfs_wait_on_pages(
- xfs_inode_t *ip,
- xfs_off_t first,
- xfs_off_t last)
-{
- struct address_space *mapping = VFS_I(ip)->i_mapping;
-
- if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
- return -filemap_fdatawait_range(mapping, first,
- last == -1 ? XFS_ISIZE(ip) - 1 : last);
- }
- return 0;
-}
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index c25b094efbf7..94eaeedc5498 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -97,7 +97,9 @@ xfs_fs_geometry(
(xfs_sb_version_haslazysbcount(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
(xfs_sb_version_hasattr2(&mp->m_sb) ?
- XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
+ XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) |
+ (xfs_sb_version_hasprojid32bit(&mp->m_sb) ?
+ XFS_FSOP_GEOM_FLAGS_PROJID32 : 0);
geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
mp->m_sb.sb_logsectsize : BBSIZE;
geo->rtsectsize = mp->m_sb.sb_blocksize;
@@ -112,18 +114,40 @@ xfs_fs_geometry(
return 0;
}
+static struct xfs_buf *
+xfs_growfs_get_hdr_buf(
+ struct xfs_mount *mp,
+ xfs_daddr_t blkno,
+ size_t numblks,
+ int flags,
+ const struct xfs_buf_ops *ops)
+{
+ struct xfs_buf *bp;
+
+ bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
+ if (!bp)
+ return NULL;
+
+ xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
+ bp->b_bn = blkno;
+ bp->b_maps[0].bm_bn = blkno;
+ bp->b_ops = ops;
+
+ return bp;
+}
+
static int
xfs_growfs_data_private(
xfs_mount_t *mp, /* mount point for filesystem */
xfs_growfs_data_t *in) /* growfs data input struct */
{
xfs_agf_t *agf;
+ struct xfs_agfl *agfl;
xfs_agi_t *agi;
xfs_agnumber_t agno;
xfs_extlen_t agsize;
xfs_extlen_t tmpsize;
xfs_alloc_rec_t *arec;
- struct xfs_btree_block *block;
xfs_buf_t *bp;
int bucket;
int dpct;
@@ -146,9 +170,14 @@ xfs_growfs_data_private(
dpct = pct - mp->m_sb.sb_imax_pct;
bp = xfs_buf_read_uncached(mp->m_ddev_targp,
XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
- XFS_FSS_TO_BB(mp, 1), 0);
+ XFS_FSS_TO_BB(mp, 1), 0, NULL);
if (!bp)
return EIO;
+ if (bp->b_error) {
+ int error = bp->b_error;
+ xfs_buf_relse(bp);
+ return error;
+ }
xfs_buf_relse(bp);
new = nb; /* use new as a temporary here */
@@ -186,17 +215,18 @@ xfs_growfs_data_private(
nfree = 0;
for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
/*
- * AG freelist header block
+ * AG freespace header block
*/
- bp = xfs_buf_get(mp->m_ddev_targp,
- XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
- XFS_FSS_TO_BB(mp, 1), 0);
+ bp = xfs_growfs_get_hdr_buf(mp,
+ XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
+ XFS_FSS_TO_BB(mp, 1), 0,
+ &xfs_agf_buf_ops);
if (!bp) {
error = ENOMEM;
goto error0;
}
+
agf = XFS_BUF_TO_AGF(bp);
- memset(agf, 0, mp->m_sb.sb_sectsize);
agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
agf->agf_seqno = cpu_to_be32(agno);
@@ -223,17 +253,39 @@ xfs_growfs_data_private(
goto error0;
/*
+ * AG freelist header block
+ */
+ bp = xfs_growfs_get_hdr_buf(mp,
+ XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
+ XFS_FSS_TO_BB(mp, 1), 0,
+ &xfs_agfl_buf_ops);
+ if (!bp) {
+ error = ENOMEM;
+ goto error0;
+ }
+
+ agfl = XFS_BUF_TO_AGFL(bp);
+ for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
+ agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
+
+ error = xfs_bwrite(bp);
+ xfs_buf_relse(bp);
+ if (error)
+ goto error0;
+
+ /*
* AG inode header block
*/
- bp = xfs_buf_get(mp->m_ddev_targp,
- XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
- XFS_FSS_TO_BB(mp, 1), 0);
+ bp = xfs_growfs_get_hdr_buf(mp,
+ XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
+ XFS_FSS_TO_BB(mp, 1), 0,
+ &xfs_agi_buf_ops);
if (!bp) {
error = ENOMEM;
goto error0;
}
+
agi = XFS_BUF_TO_AGI(bp);
- memset(agi, 0, mp->m_sb.sb_sectsize);
agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
agi->agi_seqno = cpu_to_be32(agno);
@@ -254,24 +306,22 @@ xfs_growfs_data_private(
/*
* BNO btree root block
*/
- bp = xfs_buf_get(mp->m_ddev_targp,
- XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
- BTOBB(mp->m_sb.sb_blocksize), 0);
+ bp = xfs_growfs_get_hdr_buf(mp,
+ XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
+ BTOBB(mp->m_sb.sb_blocksize), 0,
+ &xfs_allocbt_buf_ops);
+
if (!bp) {
error = ENOMEM;
goto error0;
}
- block = XFS_BUF_TO_BLOCK(bp);
- memset(block, 0, mp->m_sb.sb_blocksize);
- block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
- block->bb_level = 0;
- block->bb_numrecs = cpu_to_be16(1);
- block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
- block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
- arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
+
+ xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0);
+ arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
arec->ar_blockcount = cpu_to_be32(
agsize - be32_to_cpu(arec->ar_startblock));
+
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
if (error)
@@ -280,25 +330,22 @@ xfs_growfs_data_private(
/*
* CNT btree root block
*/
- bp = xfs_buf_get(mp->m_ddev_targp,
- XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
- BTOBB(mp->m_sb.sb_blocksize), 0);
+ bp = xfs_growfs_get_hdr_buf(mp,
+ XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
+ BTOBB(mp->m_sb.sb_blocksize), 0,
+ &xfs_allocbt_buf_ops);
if (!bp) {
error = ENOMEM;
goto error0;
}
- block = XFS_BUF_TO_BLOCK(bp);
- memset(block, 0, mp->m_sb.sb_blocksize);
- block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
- block->bb_level = 0;
- block->bb_numrecs = cpu_to_be16(1);
- block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
- block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
- arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
+
+ xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0);
+ arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
arec->ar_blockcount = cpu_to_be32(
agsize - be32_to_cpu(arec->ar_startblock));
nfree += be32_to_cpu(arec->ar_blockcount);
+
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
if (error)
@@ -307,20 +354,17 @@ xfs_growfs_data_private(
/*
* INO btree root block
*/
- bp = xfs_buf_get(mp->m_ddev_targp,
- XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
- BTOBB(mp->m_sb.sb_blocksize), 0);
+ bp = xfs_growfs_get_hdr_buf(mp,
+ XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
+ BTOBB(mp->m_sb.sb_blocksize), 0,
+ &xfs_inobt_buf_ops);
if (!bp) {
error = ENOMEM;
goto error0;
}
- block = XFS_BUF_TO_BLOCK(bp);
- memset(block, 0, mp->m_sb.sb_blocksize);
- block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
- block->bb_level = 0;
- block->bb_numrecs = 0;
- block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
- block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
+
+ xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0);
+
error = xfs_bwrite(bp);
xfs_buf_relse(bp);
if (error)
@@ -399,9 +443,28 @@ xfs_growfs_data_private(
/* update secondary superblocks. */
for (agno = 1; agno < nagcount; agno++) {
- error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
+ error = 0;
+ /*
+ * new secondary superblocks need to be zeroed, not read from
+ * disk as the contents of the new area we are growing into is
+ * completely unknown.
+ */
+ if (agno < oagcount) {
+ error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
+ XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
+ XFS_FSS_TO_BB(mp, 1), 0, &bp,
+ &xfs_sb_buf_ops);
+ } else {
+ bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
- XFS_FSS_TO_BB(mp, 1), 0, &bp);
+ XFS_FSS_TO_BB(mp, 1), 0);
+ if (bp) {
+ bp->b_ops = &xfs_sb_buf_ops;
+ xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
+ } else
+ error = ENOMEM;
+ }
+
if (error) {
xfs_warn(mp,
"error %d reading secondary superblock for ag %d",
@@ -409,6 +472,7 @@ xfs_growfs_data_private(
break;
}
xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
+
/*
* If we get an error writing out the alternate superblocks,
* just issue a warning and continue. The real work is
@@ -423,7 +487,7 @@ xfs_growfs_data_private(
break; /* no point in continuing */
}
}
- return 0;
+ return error;
error0:
xfs_trans_cancel(tp, XFS_TRANS_ABORT);
diff --git a/fs/xfs/xfs_globals.c b/fs/xfs/xfs_globals.c
index 76e81cff70b9..5399ef222dd7 100644
--- a/fs/xfs/xfs_globals.c
+++ b/fs/xfs/xfs_globals.c
@@ -21,7 +21,8 @@
/*
* Tunable XFS parameters. xfs_params is required even when CONFIG_SYSCTL=n,
* other XFS code uses these values. Times are measured in centisecs (i.e.
- * 100ths of a second).
+ * 100ths of a second) with the exception of eofb_timer, which is measured in
+ * seconds.
*/
xfs_param_t xfs_params = {
/* MIN DFLT MAX */
@@ -40,4 +41,5 @@ xfs_param_t xfs_params = {
.rotorstep = { 1, 1, 255 },
.inherit_nodfrg = { 0, 1, 1 },
.fstrm_timer = { 1, 30*100, 3600*100},
+ .eofb_timer = { 1, 300, 3600*24},
};
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 445bf1aef31c..a815412eab80 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -200,7 +200,8 @@ xfs_ialloc_inode_init(
*/
d = XFS_AGB_TO_DADDR(mp, agno, agbno + (j * blks_per_cluster));
fbuf = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
- mp->m_bsize * blks_per_cluster, 0);
+ mp->m_bsize * blks_per_cluster,
+ XBF_UNMAPPED);
if (!fbuf)
return ENOMEM;
/*
@@ -210,6 +211,7 @@ xfs_ialloc_inode_init(
* to log a whole cluster of inodes instead of all the
* individual transactions causing a lot of log traffic.
*/
+ fbuf->b_ops = &xfs_inode_buf_ops;
xfs_buf_zero(fbuf, 0, ninodes << mp->m_sb.sb_inodelog);
for (i = 0; i < ninodes; i++) {
int ioffset = i << mp->m_sb.sb_inodelog;
@@ -250,6 +252,7 @@ xfs_ialloc_ag_alloc(
/* boundary */
struct xfs_perag *pag;
+ memset(&args, 0, sizeof(args));
args.tp = tp;
args.mp = tp->t_mountp;
@@ -876,9 +879,9 @@ error0:
* This function is designed to be called twice if it has to do an allocation
* to make more free inodes. On the first call, *IO_agbp should be set to NULL.
* If an inode is available without having to performn an allocation, an inode
- * number is returned. In this case, *IO_agbp would be NULL. If an allocation
- * needes to be done, xfs_dialloc would return the current AGI buffer in
- * *IO_agbp. The caller should then commit the current transaction, allocate a
+ * number is returned. In this case, *IO_agbp is set to NULL. If an allocation
+ * needs to be done, xfs_dialloc returns the current AGI buffer in *IO_agbp.
+ * The caller should then commit the current transaction, allocate a
* new transaction, and call xfs_dialloc() again, passing in the previous value
* of *IO_agbp. IO_agbp should be held across the transactions. Since the AGI
* buffer is locked across the two calls, the second call is guaranteed to have
@@ -1471,6 +1474,57 @@ xfs_check_agi_unlinked(
#define xfs_check_agi_unlinked(agi)
#endif
+static void
+xfs_agi_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_agi *agi = XFS_BUF_TO_AGI(bp);
+ int agi_ok;
+
+ /*
+ * Validate the magic number of the agi block.
+ */
+ agi_ok = agi->agi_magicnum == cpu_to_be32(XFS_AGI_MAGIC) &&
+ XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum));
+
+ /*
+ * during growfs operations, the perag is not fully initialised,
+ * so we can't use it for any useful checking. growfs ensures we can't
+ * use it by using uncached buffers that don't have the perag attached
+ * so we can detect and avoid this problem.
+ */
+ if (bp->b_pag)
+ agi_ok = agi_ok && be32_to_cpu(agi->agi_seqno) ==
+ bp->b_pag->pag_agno;
+
+ if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI,
+ XFS_RANDOM_IALLOC_READ_AGI))) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agi);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+ xfs_check_agi_unlinked(agi);
+}
+
+static void
+xfs_agi_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_agi_verify(bp);
+}
+
+static void
+xfs_agi_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_agi_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_agi_buf_ops = {
+ .verify_read = xfs_agi_read_verify,
+ .verify_write = xfs_agi_write_verify,
+};
+
/*
* Read in the allocation group header (inode allocation section)
*/
@@ -1481,38 +1535,18 @@ xfs_read_agi(
xfs_agnumber_t agno, /* allocation group number */
struct xfs_buf **bpp) /* allocation group hdr buf */
{
- struct xfs_agi *agi; /* allocation group header */
- int agi_ok; /* agi is consistent */
int error;
ASSERT(agno != NULLAGNUMBER);
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
- XFS_FSS_TO_BB(mp, 1), 0, bpp);
+ XFS_FSS_TO_BB(mp, 1), 0, bpp, &xfs_agi_buf_ops);
if (error)
return error;
ASSERT(!xfs_buf_geterror(*bpp));
- agi = XFS_BUF_TO_AGI(*bpp);
-
- /*
- * Validate the magic number of the agi block.
- */
- agi_ok = agi->agi_magicnum == cpu_to_be32(XFS_AGI_MAGIC) &&
- XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)) &&
- be32_to_cpu(agi->agi_seqno) == agno;
- if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI,
- XFS_RANDOM_IALLOC_READ_AGI))) {
- XFS_CORRUPTION_ERROR("xfs_read_agi", XFS_ERRLEVEL_LOW,
- mp, agi);
- xfs_trans_brelse(tp, *bpp);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
xfs_buf_set_ref(*bpp, XFS_AGI_REF);
-
- xfs_check_agi_unlinked(agi);
return 0;
}
diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h
index 1fd6ea4e9c91..c8da3df271e6 100644
--- a/fs/xfs/xfs_ialloc.h
+++ b/fs/xfs/xfs_ialloc.h
@@ -147,7 +147,9 @@ int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
/*
* Get the data from the pointed-to record.
*/
-extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
+int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
xfs_inobt_rec_incore_t *rec, int *stat);
+extern const struct xfs_buf_ops xfs_agi_buf_ops;
+
#endif /* __XFS_IALLOC_H__ */
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index 2b8b7a37aa18..bec344b36507 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -33,6 +33,7 @@
#include "xfs_ialloc.h"
#include "xfs_alloc.h"
#include "xfs_error.h"
+#include "xfs_trace.h"
STATIC int
@@ -181,6 +182,59 @@ xfs_inobt_key_diff(
cur->bc_rec.i.ir_startino;
}
+void
+xfs_inobt_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
+ unsigned int level;
+ int sblock_ok; /* block passes checks */
+
+ /* magic number and level verification */
+ level = be16_to_cpu(block->bb_level);
+ sblock_ok = block->bb_magic == cpu_to_be32(XFS_IBT_MAGIC) &&
+ level < mp->m_in_maxlevels;
+
+ /* numrecs verification */
+ sblock_ok = sblock_ok &&
+ be16_to_cpu(block->bb_numrecs) <= mp->m_inobt_mxr[level != 0];
+
+ /* sibling pointer verification */
+ sblock_ok = sblock_ok &&
+ (block->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK) ||
+ be32_to_cpu(block->bb_u.s.bb_leftsib) < mp->m_sb.sb_agblocks) &&
+ block->bb_u.s.bb_leftsib &&
+ (block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK) ||
+ be32_to_cpu(block->bb_u.s.bb_rightsib) < mp->m_sb.sb_agblocks) &&
+ block->bb_u.s.bb_rightsib;
+
+ if (!sblock_ok) {
+ trace_xfs_btree_corrupt(bp, _RET_IP_);
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, block);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+}
+
+static void
+xfs_inobt_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_inobt_verify(bp);
+}
+
+static void
+xfs_inobt_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_inobt_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_inobt_buf_ops = {
+ .verify_read = xfs_inobt_read_verify,
+ .verify_write = xfs_inobt_write_verify,
+};
+
#ifdef DEBUG
STATIC int
xfs_inobt_keys_inorder(
@@ -218,6 +272,7 @@ static const struct xfs_btree_ops xfs_inobt_ops = {
.init_rec_from_cur = xfs_inobt_init_rec_from_cur,
.init_ptr_from_cur = xfs_inobt_init_ptr_from_cur,
.key_diff = xfs_inobt_key_diff,
+ .buf_ops = &xfs_inobt_buf_ops,
#ifdef DEBUG
.keys_inorder = xfs_inobt_keys_inorder,
.recs_inorder = xfs_inobt_recs_inorder,
diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h
index f782ad0c4769..25c0239a8eab 100644
--- a/fs/xfs/xfs_ialloc_btree.h
+++ b/fs/xfs/xfs_ialloc_btree.h
@@ -109,4 +109,6 @@ extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t);
extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
+extern const struct xfs_buf_ops xfs_inobt_buf_ops;
+
#endif /* __XFS_IALLOC_BTREE_H__ */
diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_icache.c
index 9500caf15acf..96e344e3e927 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_icache.c
@@ -19,6 +19,7 @@
#include "xfs_fs.h"
#include "xfs_types.h"
#include "xfs_log.h"
+#include "xfs_log_priv.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
@@ -35,11 +36,425 @@
#include "xfs_quota.h"
#include "xfs_trace.h"
#include "xfs_fsops.h"
+#include "xfs_icache.h"
#include <linux/kthread.h>
#include <linux/freezer.h>
-struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */
+STATIC void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp,
+ struct xfs_perag *pag, struct xfs_inode *ip);
+
+/*
+ * Allocate and initialise an xfs_inode.
+ */
+STATIC struct xfs_inode *
+xfs_inode_alloc(
+ struct xfs_mount *mp,
+ xfs_ino_t ino)
+{
+ struct xfs_inode *ip;
+
+ /*
+ * if this didn't occur in transactions, we could use
+ * KM_MAYFAIL and return NULL here on ENOMEM. Set the
+ * code up to do this anyway.
+ */
+ ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP);
+ if (!ip)
+ return NULL;
+ if (inode_init_always(mp->m_super, VFS_I(ip))) {
+ kmem_zone_free(xfs_inode_zone, ip);
+ return NULL;
+ }
+
+ ASSERT(atomic_read(&ip->i_pincount) == 0);
+ ASSERT(!spin_is_locked(&ip->i_flags_lock));
+ ASSERT(!xfs_isiflocked(ip));
+ ASSERT(ip->i_ino == 0);
+
+ mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
+
+ /* initialise the xfs inode */
+ ip->i_ino = ino;
+ ip->i_mount = mp;
+ memset(&ip->i_imap, 0, sizeof(struct xfs_imap));
+ ip->i_afp = NULL;
+ memset(&ip->i_df, 0, sizeof(xfs_ifork_t));
+ ip->i_flags = 0;
+ ip->i_delayed_blks = 0;
+ memset(&ip->i_d, 0, sizeof(xfs_icdinode_t));
+
+ return ip;
+}
+
+STATIC void
+xfs_inode_free_callback(
+ struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ struct xfs_inode *ip = XFS_I(inode);
+
+ kmem_zone_free(xfs_inode_zone, ip);
+}
+
+STATIC void
+xfs_inode_free(
+ struct xfs_inode *ip)
+{
+ switch (ip->i_d.di_mode & S_IFMT) {
+ case S_IFREG:
+ case S_IFDIR:
+ case S_IFLNK:
+ xfs_idestroy_fork(ip, XFS_DATA_FORK);
+ break;
+ }
+
+ if (ip->i_afp)
+ xfs_idestroy_fork(ip, XFS_ATTR_FORK);
+
+ if (ip->i_itemp) {
+ ASSERT(!(ip->i_itemp->ili_item.li_flags & XFS_LI_IN_AIL));
+ xfs_inode_item_destroy(ip);
+ ip->i_itemp = NULL;
+ }
+
+ /* asserts to verify all state is correct here */
+ ASSERT(atomic_read(&ip->i_pincount) == 0);
+ ASSERT(!spin_is_locked(&ip->i_flags_lock));
+ ASSERT(!xfs_isiflocked(ip));
+
+ /*
+ * Because we use RCU freeing we need to ensure the inode always
+ * appears to be reclaimed with an invalid inode number when in the
+ * free state. The ip->i_flags_lock provides the barrier against lookup
+ * races.
+ */
+ spin_lock(&ip->i_flags_lock);
+ ip->i_flags = XFS_IRECLAIM;
+ ip->i_ino = 0;
+ spin_unlock(&ip->i_flags_lock);
+
+ call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback);
+}
+
+/*
+ * Check the validity of the inode we just found it the cache
+ */
+static int
+xfs_iget_cache_hit(
+ struct xfs_perag *pag,
+ struct xfs_inode *ip,
+ xfs_ino_t ino,
+ int flags,
+ int lock_flags) __releases(RCU)
+{
+ struct inode *inode = VFS_I(ip);
+ struct xfs_mount *mp = ip->i_mount;
+ int error;
+
+ /*
+ * check for re-use of an inode within an RCU grace period due to the
+ * radix tree nodes not being updated yet. We monitor for this by
+ * setting the inode number to zero before freeing the inode structure.
+ * If the inode has been reallocated and set up, then the inode number
+ * will not match, so check for that, too.
+ */
+ spin_lock(&ip->i_flags_lock);
+ if (ip->i_ino != ino) {
+ trace_xfs_iget_skip(ip);
+ XFS_STATS_INC(xs_ig_frecycle);
+ error = EAGAIN;
+ goto out_error;
+ }
+
+
+ /*
+ * If we are racing with another cache hit that is currently
+ * instantiating this inode or currently recycling it out of
+ * reclaimabe state, wait for the initialisation to complete
+ * before continuing.
+ *
+ * XXX(hch): eventually we should do something equivalent to
+ * wait_on_inode to wait for these flags to be cleared
+ * instead of polling for it.
+ */
+ if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) {
+ trace_xfs_iget_skip(ip);
+ XFS_STATS_INC(xs_ig_frecycle);
+ error = EAGAIN;
+ goto out_error;
+ }
+
+ /*
+ * If lookup is racing with unlink return an error immediately.
+ */
+ if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) {
+ error = ENOENT;
+ goto out_error;
+ }
+
+ /*
+ * If IRECLAIMABLE is set, we've torn down the VFS inode already.
+ * Need to carefully get it back into useable state.
+ */
+ if (ip->i_flags & XFS_IRECLAIMABLE) {
+ trace_xfs_iget_reclaim(ip);
+
+ /*
+ * We need to set XFS_IRECLAIM to prevent xfs_reclaim_inode
+ * from stomping over us while we recycle the inode. We can't
+ * clear the radix tree reclaimable tag yet as it requires
+ * pag_ici_lock to be held exclusive.
+ */
+ ip->i_flags |= XFS_IRECLAIM;
+
+ spin_unlock(&ip->i_flags_lock);
+ rcu_read_unlock();
+
+ error = -inode_init_always(mp->m_super, inode);
+ if (error) {
+ /*
+ * Re-initializing the inode failed, and we are in deep
+ * trouble. Try to re-add it to the reclaim list.
+ */
+ rcu_read_lock();
+ spin_lock(&ip->i_flags_lock);
+
+ ip->i_flags &= ~(XFS_INEW | XFS_IRECLAIM);
+ ASSERT(ip->i_flags & XFS_IRECLAIMABLE);
+ trace_xfs_iget_reclaim_fail(ip);
+ goto out_error;
+ }
+
+ spin_lock(&pag->pag_ici_lock);
+ spin_lock(&ip->i_flags_lock);
+
+ /*
+ * Clear the per-lifetime state in the inode as we are now
+ * effectively a new inode and need to return to the initial
+ * state before reuse occurs.
+ */
+ ip->i_flags &= ~XFS_IRECLAIM_RESET_FLAGS;
+ ip->i_flags |= XFS_INEW;
+ __xfs_inode_clear_reclaim_tag(mp, pag, ip);
+ inode->i_state = I_NEW;
+
+ ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
+ mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
+
+ spin_unlock(&ip->i_flags_lock);
+ spin_unlock(&pag->pag_ici_lock);
+ } else {
+ /* If the VFS inode is being torn down, pause and try again. */
+ if (!igrab(inode)) {
+ trace_xfs_iget_skip(ip);
+ error = EAGAIN;
+ goto out_error;
+ }
+
+ /* We've got a live one. */
+ spin_unlock(&ip->i_flags_lock);
+ rcu_read_unlock();
+ trace_xfs_iget_hit(ip);
+ }
+
+ if (lock_flags != 0)
+ xfs_ilock(ip, lock_flags);
+
+ xfs_iflags_clear(ip, XFS_ISTALE | XFS_IDONTCACHE);
+ XFS_STATS_INC(xs_ig_found);
+
+ return 0;
+
+out_error:
+ spin_unlock(&ip->i_flags_lock);
+ rcu_read_unlock();
+ return error;
+}
+
+
+static int
+xfs_iget_cache_miss(
+ struct xfs_mount *mp,
+ struct xfs_perag *pag,
+ xfs_trans_t *tp,
+ xfs_ino_t ino,
+ struct xfs_inode **ipp,
+ int flags,
+ int lock_flags)
+{
+ struct xfs_inode *ip;
+ int error;
+ xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino);
+ int iflags;
+
+ ip = xfs_inode_alloc(mp, ino);
+ if (!ip)
+ return ENOMEM;
+
+ error = xfs_iread(mp, tp, ip, flags);
+ if (error)
+ goto out_destroy;
+
+ trace_xfs_iget_miss(ip);
+
+ if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) {
+ error = ENOENT;
+ goto out_destroy;
+ }
+
+ /*
+ * Preload the radix tree so we can insert safely under the
+ * write spinlock. Note that we cannot sleep inside the preload
+ * region. Since we can be called from transaction context, don't
+ * recurse into the file system.
+ */
+ if (radix_tree_preload(GFP_NOFS)) {
+ error = EAGAIN;
+ goto out_destroy;
+ }
+
+ /*
+ * Because the inode hasn't been added to the radix-tree yet it can't
+ * be found by another thread, so we can do the non-sleeping lock here.
+ */
+ if (lock_flags) {
+ if (!xfs_ilock_nowait(ip, lock_flags))
+ BUG();
+ }
+
+ /*
+ * These values must be set before inserting the inode into the radix
+ * tree as the moment it is inserted a concurrent lookup (allowed by the
+ * RCU locking mechanism) can find it and that lookup must see that this
+ * is an inode currently under construction (i.e. that XFS_INEW is set).
+ * The ip->i_flags_lock that protects the XFS_INEW flag forms the
+ * memory barrier that ensures this detection works correctly at lookup
+ * time.
+ */
+ iflags = XFS_INEW;
+ if (flags & XFS_IGET_DONTCACHE)
+ iflags |= XFS_IDONTCACHE;
+ ip->i_udquot = ip->i_gdquot = NULL;
+ xfs_iflags_set(ip, iflags);
+
+ /* insert the new inode */
+ spin_lock(&pag->pag_ici_lock);
+ error = radix_tree_insert(&pag->pag_ici_root, agino, ip);
+ if (unlikely(error)) {
+ WARN_ON(error != -EEXIST);
+ XFS_STATS_INC(xs_ig_dup);
+ error = EAGAIN;
+ goto out_preload_end;
+ }
+ spin_unlock(&pag->pag_ici_lock);
+ radix_tree_preload_end();
+
+ *ipp = ip;
+ return 0;
+
+out_preload_end:
+ spin_unlock(&pag->pag_ici_lock);
+ radix_tree_preload_end();
+ if (lock_flags)
+ xfs_iunlock(ip, lock_flags);
+out_destroy:
+ __destroy_inode(VFS_I(ip));
+ xfs_inode_free(ip);
+ return error;
+}
+
+/*
+ * Look up an inode by number in the given file system.
+ * The inode is looked up in the cache held in each AG.
+ * If the inode is found in the cache, initialise the vfs inode
+ * if necessary.
+ *
+ * If it is not in core, read it in from the file system's device,
+ * add it to the cache and initialise the vfs inode.
+ *
+ * The inode is locked according to the value of the lock_flags parameter.
+ * This flag parameter indicates how and if the inode's IO lock and inode lock
+ * should be taken.
+ *
+ * mp -- the mount point structure for the current file system. It points
+ * to the inode hash table.
+ * tp -- a pointer to the current transaction if there is one. This is
+ * simply passed through to the xfs_iread() call.
+ * ino -- the number of the inode desired. This is the unique identifier
+ * within the file system for the inode being requested.
+ * lock_flags -- flags indicating how to lock the inode. See the comment
+ * for xfs_ilock() for a list of valid values.
+ */
+int
+xfs_iget(
+ xfs_mount_t *mp,
+ xfs_trans_t *tp,
+ xfs_ino_t ino,
+ uint flags,
+ uint lock_flags,
+ xfs_inode_t **ipp)
+{
+ xfs_inode_t *ip;
+ int error;
+ xfs_perag_t *pag;
+ xfs_agino_t agino;
+
+ /*
+ * xfs_reclaim_inode() uses the ILOCK to ensure an inode
+ * doesn't get freed while it's being referenced during a
+ * radix tree traversal here. It assumes this function
+ * aqcuires only the ILOCK (and therefore it has no need to
+ * involve the IOLOCK in this synchronization).
+ */
+ ASSERT((lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) == 0);
+
+ /* reject inode numbers outside existing AGs */
+ if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount)
+ return EINVAL;
+
+ /* get the perag structure and ensure that it's inode capable */
+ pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino));
+ agino = XFS_INO_TO_AGINO(mp, ino);
+
+again:
+ error = 0;
+ rcu_read_lock();
+ ip = radix_tree_lookup(&pag->pag_ici_root, agino);
+
+ if (ip) {
+ error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags);
+ if (error)
+ goto out_error_or_again;
+ } else {
+ rcu_read_unlock();
+ XFS_STATS_INC(xs_ig_missed);
+
+ error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip,
+ flags, lock_flags);
+ if (error)
+ goto out_error_or_again;
+ }
+ xfs_perag_put(pag);
+
+ *ipp = ip;
+
+ /*
+ * If we have a real type for an on-disk inode, we can set ops(&unlock)
+ * now. If it's a new inode being created, xfs_ialloc will handle it.
+ */
+ if (xfs_iflags_test(ip, XFS_INEW) && ip->i_d.di_mode != 0)
+ xfs_setup_inode(ip);
+ return 0;
+
+out_error_or_again:
+ if (error == EAGAIN) {
+ delay(1);
+ goto again;
+ }
+ xfs_perag_put(pag);
+ return error;
+}
/*
* The inode lookup is done in batches to keep the amount of lock traffic and
@@ -101,8 +516,11 @@ xfs_inode_ag_walk(
struct xfs_mount *mp,
struct xfs_perag *pag,
int (*execute)(struct xfs_inode *ip,
- struct xfs_perag *pag, int flags),
- int flags)
+ struct xfs_perag *pag, int flags,
+ void *args),
+ int flags,
+ void *args,
+ int tag)
{
uint32_t first_index;
int last_error = 0;
@@ -121,9 +539,17 @@ restart:
int i;
rcu_read_lock();
- nr_found = radix_tree_gang_lookup(&pag->pag_ici_root,
+
+ if (tag == -1)
+ nr_found = radix_tree_gang_lookup(&pag->pag_ici_root,
(void **)batch, first_index,
XFS_LOOKUP_BATCH);
+ else
+ nr_found = radix_tree_gang_lookup_tag(
+ &pag->pag_ici_root,
+ (void **) batch, first_index,
+ XFS_LOOKUP_BATCH, tag);
+
if (!nr_found) {
rcu_read_unlock();
break;
@@ -164,7 +590,7 @@ restart:
for (i = 0; i < nr_found; i++) {
if (!batch[i])
continue;
- error = execute(batch[i], pag, flags);
+ error = execute(batch[i], pag, flags, args);
IRELE(batch[i]);
if (error == EAGAIN) {
skipped++;
@@ -189,12 +615,40 @@ restart:
return last_error;
}
+/*
+ * Background scanning to trim post-EOF preallocated space. This is queued
+ * based on the 'background_prealloc_discard_period' tunable (5m by default).
+ */
+STATIC void
+xfs_queue_eofblocks(
+ struct xfs_mount *mp)
+{
+ rcu_read_lock();
+ if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_EOFBLOCKS_TAG))
+ queue_delayed_work(mp->m_eofblocks_workqueue,
+ &mp->m_eofblocks_work,
+ msecs_to_jiffies(xfs_eofb_secs * 1000));
+ rcu_read_unlock();
+}
+
+void
+xfs_eofblocks_worker(
+ struct work_struct *work)
+{
+ struct xfs_mount *mp = container_of(to_delayed_work(work),
+ struct xfs_mount, m_eofblocks_work);
+ xfs_icache_free_eofblocks(mp, NULL);
+ xfs_queue_eofblocks(mp);
+}
+
int
xfs_inode_ag_iterator(
struct xfs_mount *mp,
int (*execute)(struct xfs_inode *ip,
- struct xfs_perag *pag, int flags),
- int flags)
+ struct xfs_perag *pag, int flags,
+ void *args),
+ int flags,
+ void *args)
{
struct xfs_perag *pag;
int error = 0;
@@ -204,7 +658,7 @@ xfs_inode_ag_iterator(
ag = 0;
while ((pag = xfs_perag_get(mp, ag))) {
ag = pag->pag_agno + 1;
- error = xfs_inode_ag_walk(mp, pag, execute, flags);
+ error = xfs_inode_ag_walk(mp, pag, execute, flags, args, -1);
xfs_perag_put(pag);
if (error) {
last_error = error;
@@ -215,224 +669,50 @@ xfs_inode_ag_iterator(
return XFS_ERROR(last_error);
}
-STATIC int
-xfs_sync_inode_data(
- struct xfs_inode *ip,
- struct xfs_perag *pag,
- int flags)
-{
- struct inode *inode = VFS_I(ip);
- struct address_space *mapping = inode->i_mapping;
- int error = 0;
-
- if (!mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
- return 0;
-
- if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED)) {
- if (flags & SYNC_TRYLOCK)
- return 0;
- xfs_ilock(ip, XFS_IOLOCK_SHARED);
- }
-
- error = xfs_flush_pages(ip, 0, -1, (flags & SYNC_WAIT) ?
- 0 : XBF_ASYNC, FI_NONE);
- xfs_iunlock(ip, XFS_IOLOCK_SHARED);
- return error;
-}
-
-/*
- * Write out pagecache data for the whole filesystem.
- */
-STATIC int
-xfs_sync_data(
- struct xfs_mount *mp,
- int flags)
-{
- int error;
-
- ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0);
-
- error = xfs_inode_ag_iterator(mp, xfs_sync_inode_data, flags);
- if (error)
- return XFS_ERROR(error);
-
- xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0);
- return 0;
-}
-
-STATIC int
-xfs_sync_fsdata(
- struct xfs_mount *mp)
-{
- struct xfs_buf *bp;
- int error;
-
- /*
- * If the buffer is pinned then push on the log so we won't get stuck
- * waiting in the write for someone, maybe ourselves, to flush the log.
- *
- * Even though we just pushed the log above, we did not have the
- * superblock buffer locked at that point so it can become pinned in
- * between there and here.
- */
- bp = xfs_getsb(mp, 0);
- if (xfs_buf_ispinned(bp))
- xfs_log_force(mp, 0);
- error = xfs_bwrite(bp);
- xfs_buf_relse(bp);
- return error;
-}
-
-/*
- * When remounting a filesystem read-only or freezing the filesystem, we have
- * two phases to execute. This first phase is syncing the data before we
- * quiesce the filesystem, and the second is flushing all the inodes out after
- * we've waited for all the transactions created by the first phase to
- * complete. The second phase ensures that the inodes are written to their
- * location on disk rather than just existing in transactions in the log. This
- * means after a quiesce there is no log replay required to write the inodes to
- * disk (this is the main difference between a sync and a quiesce).
- */
-/*
- * First stage of freeze - no writers will make progress now we are here,
- * so we flush delwri and delalloc buffers here, then wait for all I/O to
- * complete. Data is frozen at that point. Metadata is not frozen,
- * transactions can still occur here so don't bother emptying the AIL
- * because it'll just get dirty again.
- */
int
-xfs_quiesce_data(
- struct xfs_mount *mp)
-{
- int error, error2 = 0;
-
- /* force out the log */
- xfs_log_force(mp, XFS_LOG_SYNC);
-
- /* write superblock and hoover up shutdown errors */
- error = xfs_sync_fsdata(mp);
-
- /* mark the log as covered if needed */
- if (xfs_log_need_covered(mp))
- error2 = xfs_fs_log_dummy(mp);
-
- return error ? error : error2;
-}
-
-/*
- * Second stage of a quiesce. The data is already synced, now we have to take
- * care of the metadata. New transactions are already blocked, so we need to
- * wait for any remaining transactions to drain out before proceeding.
- */
-void
-xfs_quiesce_attr(
- struct xfs_mount *mp)
-{
- int error = 0;
-
- /* wait for all modifications to complete */
- while (atomic_read(&mp->m_active_trans) > 0)
- delay(100);
-
- /* reclaim inodes to do any IO before the freeze completes */
- xfs_reclaim_inodes(mp, 0);
- xfs_reclaim_inodes(mp, SYNC_WAIT);
-
- /* flush all pending changes from the AIL */
- xfs_ail_push_all_sync(mp->m_ail);
-
- /*
- * Just warn here till VFS can correctly support
- * read-only remount without racing.
- */
- WARN_ON(atomic_read(&mp->m_active_trans) != 0);
-
- /* Push the superblock and write an unmount record */
- error = xfs_log_sbcount(mp);
- if (error)
- xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
- "Frozen image may not be consistent.");
- xfs_log_unmount_write(mp);
-
- /*
- * At this point we might have modified the superblock again and thus
- * added an item to the AIL, thus flush it again.
- */
- xfs_ail_push_all_sync(mp->m_ail);
-
- /*
- * The superblock buffer is uncached and xfsaild_push() will lock and
- * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait()
- * here but a lock on the superblock buffer will block until iodone()
- * has completed.
- */
- xfs_buf_lock(mp->m_sb_bp);
- xfs_buf_unlock(mp->m_sb_bp);
-}
-
-static void
-xfs_syncd_queue_sync(
- struct xfs_mount *mp)
-{
- queue_delayed_work(xfs_syncd_wq, &mp->m_sync_work,
- msecs_to_jiffies(xfs_syncd_centisecs * 10));
-}
-
-/*
- * Every sync period we need to unpin all items, reclaim inodes and sync
- * disk quotas. We might need to cover the log to indicate that the
- * filesystem is idle and not frozen.
- */
-STATIC void
-xfs_sync_worker(
- struct work_struct *work)
+xfs_inode_ag_iterator_tag(
+ struct xfs_mount *mp,
+ int (*execute)(struct xfs_inode *ip,
+ struct xfs_perag *pag, int flags,
+ void *args),
+ int flags,
+ void *args,
+ int tag)
{
- struct xfs_mount *mp = container_of(to_delayed_work(work),
- struct xfs_mount, m_sync_work);
- int error;
-
- /*
- * We shouldn't write/force the log if we are in the mount/unmount
- * process or on a read only filesystem. The workqueue still needs to be
- * active in both cases, however, because it is used for inode reclaim
- * during these times. Use the MS_ACTIVE flag to avoid doing anything
- * during mount. Doing work during unmount is avoided by calling
- * cancel_delayed_work_sync on this work queue before tearing down
- * the ail and the log in xfs_log_unmount.
- */
- if (!(mp->m_super->s_flags & MS_ACTIVE) &&
- !(mp->m_flags & XFS_MOUNT_RDONLY)) {
- /* dgc: errors ignored here */
- if (mp->m_super->s_writers.frozen == SB_UNFROZEN &&
- xfs_log_need_covered(mp))
- error = xfs_fs_log_dummy(mp);
- else
- xfs_log_force(mp, 0);
+ struct xfs_perag *pag;
+ int error = 0;
+ int last_error = 0;
+ xfs_agnumber_t ag;
- /* start pushing all the metadata that is currently
- * dirty */
- xfs_ail_push_all(mp->m_ail);
+ ag = 0;
+ while ((pag = xfs_perag_get_tag(mp, ag, tag))) {
+ ag = pag->pag_agno + 1;
+ error = xfs_inode_ag_walk(mp, pag, execute, flags, args, tag);
+ xfs_perag_put(pag);
+ if (error) {
+ last_error = error;
+ if (error == EFSCORRUPTED)
+ break;
+ }
}
-
- /* queue us up again */
- xfs_syncd_queue_sync(mp);
+ return XFS_ERROR(last_error);
}
/*
* Queue a new inode reclaim pass if there are reclaimable inodes and there
* isn't a reclaim pass already in progress. By default it runs every 5s based
- * on the xfs syncd work default of 30s. Perhaps this should have it's own
+ * on the xfs periodic sync default of 30s. Perhaps this should have it's own
* tunable, but that can be done if this method proves to be ineffective or too
* aggressive.
*/
static void
-xfs_syncd_queue_reclaim(
+xfs_reclaim_work_queue(
struct xfs_mount *mp)
{
rcu_read_lock();
if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_RECLAIM_TAG)) {
- queue_delayed_work(xfs_syncd_wq, &mp->m_reclaim_work,
+ queue_delayed_work(mp->m_reclaim_workqueue, &mp->m_reclaim_work,
msecs_to_jiffies(xfs_syncd_centisecs / 6 * 10));
}
rcu_read_unlock();
@@ -445,7 +725,7 @@ xfs_syncd_queue_reclaim(
* goes low. It scans as quickly as possible avoiding locked inodes or those
* already being flushed, and once done schedules a future pass.
*/
-STATIC void
+void
xfs_reclaim_worker(
struct work_struct *work)
{
@@ -453,65 +733,10 @@ xfs_reclaim_worker(
struct xfs_mount, m_reclaim_work);
xfs_reclaim_inodes(mp, SYNC_TRYLOCK);
- xfs_syncd_queue_reclaim(mp);
+ xfs_reclaim_work_queue(mp);
}
-/*
- * Flush delayed allocate data, attempting to free up reserved space
- * from existing allocations. At this point a new allocation attempt
- * has failed with ENOSPC and we are in the process of scratching our
- * heads, looking about for more room.
- *
- * Queue a new data flush if there isn't one already in progress and
- * wait for completion of the flush. This means that we only ever have one
- * inode flush in progress no matter how many ENOSPC events are occurring and
- * so will prevent the system from bogging down due to every concurrent
- * ENOSPC event scanning all the active inodes in the system for writeback.
- */
-void
-xfs_flush_inodes(
- struct xfs_inode *ip)
-{
- struct xfs_mount *mp = ip->i_mount;
-
- queue_work(xfs_syncd_wq, &mp->m_flush_work);
- flush_work(&mp->m_flush_work);
-}
-
-STATIC void
-xfs_flush_worker(
- struct work_struct *work)
-{
- struct xfs_mount *mp = container_of(work,
- struct xfs_mount, m_flush_work);
-
- xfs_sync_data(mp, SYNC_TRYLOCK);
- xfs_sync_data(mp, SYNC_TRYLOCK | SYNC_WAIT);
-}
-
-int
-xfs_syncd_init(
- struct xfs_mount *mp)
-{
- INIT_WORK(&mp->m_flush_work, xfs_flush_worker);
- INIT_DELAYED_WORK(&mp->m_sync_work, xfs_sync_worker);
- INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
-
- xfs_syncd_queue_sync(mp);
-
- return 0;
-}
-
-void
-xfs_syncd_stop(
- struct xfs_mount *mp)
-{
- cancel_delayed_work_sync(&mp->m_sync_work);
- cancel_delayed_work_sync(&mp->m_reclaim_work);
- cancel_work_sync(&mp->m_flush_work);
-}
-
-void
+static void
__xfs_inode_set_reclaim_tag(
struct xfs_perag *pag,
struct xfs_inode *ip)
@@ -529,7 +754,7 @@ __xfs_inode_set_reclaim_tag(
spin_unlock(&ip->i_mount->m_perag_lock);
/* schedule periodic background inode reclaim */
- xfs_syncd_queue_reclaim(ip->i_mount);
+ xfs_reclaim_work_queue(ip->i_mount);
trace_xfs_perag_set_reclaim(ip->i_mount, pag->pag_agno,
-1, _RET_IP_);
@@ -577,7 +802,7 @@ __xfs_inode_clear_reclaim(
}
}
-void
+STATIC void
__xfs_inode_clear_reclaim_tag(
xfs_mount_t *mp,
xfs_perag_t *pag,
@@ -787,9 +1012,9 @@ out:
/*
* We could return EAGAIN here to make reclaim rescan the inode tree in
* a short while. However, this just burns CPU time scanning the tree
- * waiting for IO to complete and xfssyncd never goes back to the idle
- * state. Instead, return 0 to let the next scheduled background reclaim
- * attempt to reclaim the inode again.
+ * waiting for IO to complete and the reclaim work never goes back to
+ * the idle state. Instead, return 0 to let the next scheduled
+ * background reclaim attempt to reclaim the inode again.
*/
return 0;
}
@@ -800,7 +1025,7 @@ out:
* then a shut down during filesystem unmount reclaim walk leak all the
* unreclaimed inodes.
*/
-int
+STATIC int
xfs_reclaim_inodes_ag(
struct xfs_mount *mp,
int flags,
@@ -945,7 +1170,7 @@ xfs_reclaim_inodes_nr(
int nr_to_scan)
{
/* kick background reclaimer and push the AIL */
- xfs_syncd_queue_reclaim(mp);
+ xfs_reclaim_work_queue(mp);
xfs_ail_push_all(mp->m_ail);
xfs_reclaim_inodes_ag(mp, SYNC_TRYLOCK | SYNC_WAIT, &nr_to_scan);
@@ -971,3 +1196,146 @@ xfs_reclaim_inodes_count(
return reclaimable;
}
+STATIC int
+xfs_inode_match_id(
+ struct xfs_inode *ip,
+ struct xfs_eofblocks *eofb)
+{
+ if (eofb->eof_flags & XFS_EOF_FLAGS_UID &&
+ ip->i_d.di_uid != eofb->eof_uid)
+ return 0;
+
+ if (eofb->eof_flags & XFS_EOF_FLAGS_GID &&
+ ip->i_d.di_gid != eofb->eof_gid)
+ return 0;
+
+ if (eofb->eof_flags & XFS_EOF_FLAGS_PRID &&
+ xfs_get_projid(ip) != eofb->eof_prid)
+ return 0;
+
+ return 1;
+}
+
+STATIC int
+xfs_inode_free_eofblocks(
+ struct xfs_inode *ip,
+ struct xfs_perag *pag,
+ int flags,
+ void *args)
+{
+ int ret;
+ struct xfs_eofblocks *eofb = args;
+
+ if (!xfs_can_free_eofblocks(ip, false)) {
+ /* inode could be preallocated or append-only */
+ trace_xfs_inode_free_eofblocks_invalid(ip);
+ xfs_inode_clear_eofblocks_tag(ip);
+ return 0;
+ }
+
+ /*
+ * If the mapping is dirty the operation can block and wait for some
+ * time. Unless we are waiting, skip it.
+ */
+ if (!(flags & SYNC_WAIT) &&
+ mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
+ return 0;
+
+ if (eofb) {
+ if (!xfs_inode_match_id(ip, eofb))
+ return 0;
+
+ /* skip the inode if the file size is too small */
+ if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
+ XFS_ISIZE(ip) < eofb->eof_min_file_size)
+ return 0;
+ }
+
+ ret = xfs_free_eofblocks(ip->i_mount, ip, true);
+
+ /* don't revisit the inode if we're not waiting */
+ if (ret == EAGAIN && !(flags & SYNC_WAIT))
+ ret = 0;
+
+ return ret;
+}
+
+int
+xfs_icache_free_eofblocks(
+ struct xfs_mount *mp,
+ struct xfs_eofblocks *eofb)
+{
+ int flags = SYNC_TRYLOCK;
+
+ if (eofb && (eofb->eof_flags & XFS_EOF_FLAGS_SYNC))
+ flags = SYNC_WAIT;
+
+ return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags,
+ eofb, XFS_ICI_EOFBLOCKS_TAG);
+}
+
+void
+xfs_inode_set_eofblocks_tag(
+ xfs_inode_t *ip)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_perag *pag;
+ int tagged;
+
+ pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
+ spin_lock(&pag->pag_ici_lock);
+ trace_xfs_inode_set_eofblocks_tag(ip);
+
+ tagged = radix_tree_tagged(&pag->pag_ici_root,
+ XFS_ICI_EOFBLOCKS_TAG);
+ radix_tree_tag_set(&pag->pag_ici_root,
+ XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino),
+ XFS_ICI_EOFBLOCKS_TAG);
+ if (!tagged) {
+ /* propagate the eofblocks tag up into the perag radix tree */
+ spin_lock(&ip->i_mount->m_perag_lock);
+ radix_tree_tag_set(&ip->i_mount->m_perag_tree,
+ XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino),
+ XFS_ICI_EOFBLOCKS_TAG);
+ spin_unlock(&ip->i_mount->m_perag_lock);
+
+ /* kick off background trimming */
+ xfs_queue_eofblocks(ip->i_mount);
+
+ trace_xfs_perag_set_eofblocks(ip->i_mount, pag->pag_agno,
+ -1, _RET_IP_);
+ }
+
+ spin_unlock(&pag->pag_ici_lock);
+ xfs_perag_put(pag);
+}
+
+void
+xfs_inode_clear_eofblocks_tag(
+ xfs_inode_t *ip)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_perag *pag;
+
+ pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
+ spin_lock(&pag->pag_ici_lock);
+ trace_xfs_inode_clear_eofblocks_tag(ip);
+
+ radix_tree_tag_clear(&pag->pag_ici_root,
+ XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino),
+ XFS_ICI_EOFBLOCKS_TAG);
+ if (!radix_tree_tagged(&pag->pag_ici_root, XFS_ICI_EOFBLOCKS_TAG)) {
+ /* clear the eofblocks tag from the perag radix tree */
+ spin_lock(&ip->i_mount->m_perag_lock);
+ radix_tree_tag_clear(&ip->i_mount->m_perag_tree,
+ XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino),
+ XFS_ICI_EOFBLOCKS_TAG);
+ spin_unlock(&ip->i_mount->m_perag_lock);
+ trace_xfs_perag_clear_eofblocks(ip->i_mount, pag->pag_agno,
+ -1, _RET_IP_);
+ }
+
+ spin_unlock(&pag->pag_ici_lock);
+ xfs_perag_put(pag);
+}
+
diff --git a/fs/xfs/xfs_sync.h b/fs/xfs/xfs_icache.h
index 941202e7ac6e..e0f138c70a2f 100644
--- a/fs/xfs/xfs_sync.h
+++ b/fs/xfs/xfs_icache.h
@@ -24,28 +24,30 @@ struct xfs_perag;
#define SYNC_WAIT 0x0001 /* wait for i/o to complete */
#define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */
-extern struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */
+int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino,
+ uint flags, uint lock_flags, xfs_inode_t **ipp);
-int xfs_syncd_init(struct xfs_mount *mp);
-void xfs_syncd_stop(struct xfs_mount *mp);
-
-int xfs_quiesce_data(struct xfs_mount *mp);
-void xfs_quiesce_attr(struct xfs_mount *mp);
-
-void xfs_flush_inodes(struct xfs_inode *ip);
+void xfs_reclaim_worker(struct work_struct *work);
int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
int xfs_reclaim_inodes_count(struct xfs_mount *mp);
void xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
-void __xfs_inode_set_reclaim_tag(struct xfs_perag *pag, struct xfs_inode *ip);
-void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, struct xfs_perag *pag,
- struct xfs_inode *ip);
+
+void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip);
+void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip);
+int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *);
+void xfs_eofblocks_worker(struct work_struct *);
int xfs_sync_inode_grab(struct xfs_inode *ip);
int xfs_inode_ag_iterator(struct xfs_mount *mp,
- int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, int flags),
- int flags);
+ int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag,
+ int flags, void *args),
+ int flags, void *args);
+int xfs_inode_ag_iterator_tag(struct xfs_mount *mp,
+ int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag,
+ int flags, void *args),
+ int flags, void *args, int tag);
#endif
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
deleted file mode 100644
index 784a803383ec..000000000000
--- a/fs/xfs/xfs_iget.c
+++ /dev/null
@@ -1,705 +0,0 @@
-/*
- * Copyright (c) 2000-2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_types.h"
-#include "xfs_acl.h"
-#include "xfs_log.h"
-#include "xfs_inum.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_mount.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_btree.h"
-#include "xfs_ialloc.h"
-#include "xfs_quota.h"
-#include "xfs_utils.h"
-#include "xfs_trans_priv.h"
-#include "xfs_inode_item.h"
-#include "xfs_bmap.h"
-#include "xfs_trace.h"
-
-
-/*
- * Allocate and initialise an xfs_inode.
- */
-STATIC struct xfs_inode *
-xfs_inode_alloc(
- struct xfs_mount *mp,
- xfs_ino_t ino)
-{
- struct xfs_inode *ip;
-
- /*
- * if this didn't occur in transactions, we could use
- * KM_MAYFAIL and return NULL here on ENOMEM. Set the
- * code up to do this anyway.
- */
- ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP);
- if (!ip)
- return NULL;
- if (inode_init_always(mp->m_super, VFS_I(ip))) {
- kmem_zone_free(xfs_inode_zone, ip);
- return NULL;
- }
-
- ASSERT(atomic_read(&ip->i_pincount) == 0);
- ASSERT(!spin_is_locked(&ip->i_flags_lock));
- ASSERT(!xfs_isiflocked(ip));
- ASSERT(ip->i_ino == 0);
-
- mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
-
- /* initialise the xfs inode */
- ip->i_ino = ino;
- ip->i_mount = mp;
- memset(&ip->i_imap, 0, sizeof(struct xfs_imap));
- ip->i_afp = NULL;
- memset(&ip->i_df, 0, sizeof(xfs_ifork_t));
- ip->i_flags = 0;
- ip->i_delayed_blks = 0;
- memset(&ip->i_d, 0, sizeof(xfs_icdinode_t));
-
- return ip;
-}
-
-STATIC void
-xfs_inode_free_callback(
- struct rcu_head *head)
-{
- struct inode *inode = container_of(head, struct inode, i_rcu);
- struct xfs_inode *ip = XFS_I(inode);
-
- kmem_zone_free(xfs_inode_zone, ip);
-}
-
-void
-xfs_inode_free(
- struct xfs_inode *ip)
-{
- switch (ip->i_d.di_mode & S_IFMT) {
- case S_IFREG:
- case S_IFDIR:
- case S_IFLNK:
- xfs_idestroy_fork(ip, XFS_DATA_FORK);
- break;
- }
-
- if (ip->i_afp)
- xfs_idestroy_fork(ip, XFS_ATTR_FORK);
-
- if (ip->i_itemp) {
- ASSERT(!(ip->i_itemp->ili_item.li_flags & XFS_LI_IN_AIL));
- xfs_inode_item_destroy(ip);
- ip->i_itemp = NULL;
- }
-
- /* asserts to verify all state is correct here */
- ASSERT(atomic_read(&ip->i_pincount) == 0);
- ASSERT(!spin_is_locked(&ip->i_flags_lock));
- ASSERT(!xfs_isiflocked(ip));
-
- /*
- * Because we use RCU freeing we need to ensure the inode always
- * appears to be reclaimed with an invalid inode number when in the
- * free state. The ip->i_flags_lock provides the barrier against lookup
- * races.
- */
- spin_lock(&ip->i_flags_lock);
- ip->i_flags = XFS_IRECLAIM;
- ip->i_ino = 0;
- spin_unlock(&ip->i_flags_lock);
-
- call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback);
-}
-
-/*
- * Check the validity of the inode we just found it the cache
- */
-static int
-xfs_iget_cache_hit(
- struct xfs_perag *pag,
- struct xfs_inode *ip,
- xfs_ino_t ino,
- int flags,
- int lock_flags) __releases(RCU)
-{
- struct inode *inode = VFS_I(ip);
- struct xfs_mount *mp = ip->i_mount;
- int error;
-
- /*
- * check for re-use of an inode within an RCU grace period due to the
- * radix tree nodes not being updated yet. We monitor for this by
- * setting the inode number to zero before freeing the inode structure.
- * If the inode has been reallocated and set up, then the inode number
- * will not match, so check for that, too.
- */
- spin_lock(&ip->i_flags_lock);
- if (ip->i_ino != ino) {
- trace_xfs_iget_skip(ip);
- XFS_STATS_INC(xs_ig_frecycle);
- error = EAGAIN;
- goto out_error;
- }
-
-
- /*
- * If we are racing with another cache hit that is currently
- * instantiating this inode or currently recycling it out of
- * reclaimabe state, wait for the initialisation to complete
- * before continuing.
- *
- * XXX(hch): eventually we should do something equivalent to
- * wait_on_inode to wait for these flags to be cleared
- * instead of polling for it.
- */
- if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) {
- trace_xfs_iget_skip(ip);
- XFS_STATS_INC(xs_ig_frecycle);
- error = EAGAIN;
- goto out_error;
- }
-
- /*
- * If lookup is racing with unlink return an error immediately.
- */
- if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) {
- error = ENOENT;
- goto out_error;
- }
-
- /*
- * If IRECLAIMABLE is set, we've torn down the VFS inode already.
- * Need to carefully get it back into useable state.
- */
- if (ip->i_flags & XFS_IRECLAIMABLE) {
- trace_xfs_iget_reclaim(ip);
-
- /*
- * We need to set XFS_IRECLAIM to prevent xfs_reclaim_inode
- * from stomping over us while we recycle the inode. We can't
- * clear the radix tree reclaimable tag yet as it requires
- * pag_ici_lock to be held exclusive.
- */
- ip->i_flags |= XFS_IRECLAIM;
-
- spin_unlock(&ip->i_flags_lock);
- rcu_read_unlock();
-
- error = -inode_init_always(mp->m_super, inode);
- if (error) {
- /*
- * Re-initializing the inode failed, and we are in deep
- * trouble. Try to re-add it to the reclaim list.
- */
- rcu_read_lock();
- spin_lock(&ip->i_flags_lock);
-
- ip->i_flags &= ~(XFS_INEW | XFS_IRECLAIM);
- ASSERT(ip->i_flags & XFS_IRECLAIMABLE);
- trace_xfs_iget_reclaim_fail(ip);
- goto out_error;
- }
-
- spin_lock(&pag->pag_ici_lock);
- spin_lock(&ip->i_flags_lock);
-
- /*
- * Clear the per-lifetime state in the inode as we are now
- * effectively a new inode and need to return to the initial
- * state before reuse occurs.
- */
- ip->i_flags &= ~XFS_IRECLAIM_RESET_FLAGS;
- ip->i_flags |= XFS_INEW;
- __xfs_inode_clear_reclaim_tag(mp, pag, ip);
- inode->i_state = I_NEW;
-
- ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
- mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
-
- spin_unlock(&ip->i_flags_lock);
- spin_unlock(&pag->pag_ici_lock);
- } else {
- /* If the VFS inode is being torn down, pause and try again. */
- if (!igrab(inode)) {
- trace_xfs_iget_skip(ip);
- error = EAGAIN;
- goto out_error;
- }
-
- /* We've got a live one. */
- spin_unlock(&ip->i_flags_lock);
- rcu_read_unlock();
- trace_xfs_iget_hit(ip);
- }
-
- if (lock_flags != 0)
- xfs_ilock(ip, lock_flags);
-
- xfs_iflags_clear(ip, XFS_ISTALE | XFS_IDONTCACHE);
- XFS_STATS_INC(xs_ig_found);
-
- return 0;
-
-out_error:
- spin_unlock(&ip->i_flags_lock);
- rcu_read_unlock();
- return error;
-}
-
-
-static int
-xfs_iget_cache_miss(
- struct xfs_mount *mp,
- struct xfs_perag *pag,
- xfs_trans_t *tp,
- xfs_ino_t ino,
- struct xfs_inode **ipp,
- int flags,
- int lock_flags)
-{
- struct xfs_inode *ip;
- int error;
- xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino);
- int iflags;
-
- ip = xfs_inode_alloc(mp, ino);
- if (!ip)
- return ENOMEM;
-
- error = xfs_iread(mp, tp, ip, flags);
- if (error)
- goto out_destroy;
-
- trace_xfs_iget_miss(ip);
-
- if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) {
- error = ENOENT;
- goto out_destroy;
- }
-
- /*
- * Preload the radix tree so we can insert safely under the
- * write spinlock. Note that we cannot sleep inside the preload
- * region. Since we can be called from transaction context, don't
- * recurse into the file system.
- */
- if (radix_tree_preload(GFP_NOFS)) {
- error = EAGAIN;
- goto out_destroy;
- }
-
- /*
- * Because the inode hasn't been added to the radix-tree yet it can't
- * be found by another thread, so we can do the non-sleeping lock here.
- */
- if (lock_flags) {
- if (!xfs_ilock_nowait(ip, lock_flags))
- BUG();
- }
-
- /*
- * These values must be set before inserting the inode into the radix
- * tree as the moment it is inserted a concurrent lookup (allowed by the
- * RCU locking mechanism) can find it and that lookup must see that this
- * is an inode currently under construction (i.e. that XFS_INEW is set).
- * The ip->i_flags_lock that protects the XFS_INEW flag forms the
- * memory barrier that ensures this detection works correctly at lookup
- * time.
- */
- iflags = XFS_INEW;
- if (flags & XFS_IGET_DONTCACHE)
- iflags |= XFS_IDONTCACHE;
- ip->i_udquot = ip->i_gdquot = NULL;
- xfs_iflags_set(ip, iflags);
-
- /* insert the new inode */
- spin_lock(&pag->pag_ici_lock);
- error = radix_tree_insert(&pag->pag_ici_root, agino, ip);
- if (unlikely(error)) {
- WARN_ON(error != -EEXIST);
- XFS_STATS_INC(xs_ig_dup);
- error = EAGAIN;
- goto out_preload_end;
- }
- spin_unlock(&pag->pag_ici_lock);
- radix_tree_preload_end();
-
- *ipp = ip;
- return 0;
-
-out_preload_end:
- spin_unlock(&pag->pag_ici_lock);
- radix_tree_preload_end();
- if (lock_flags)
- xfs_iunlock(ip, lock_flags);
-out_destroy:
- __destroy_inode(VFS_I(ip));
- xfs_inode_free(ip);
- return error;
-}
-
-/*
- * Look up an inode by number in the given file system.
- * The inode is looked up in the cache held in each AG.
- * If the inode is found in the cache, initialise the vfs inode
- * if necessary.
- *
- * If it is not in core, read it in from the file system's device,
- * add it to the cache and initialise the vfs inode.
- *
- * The inode is locked according to the value of the lock_flags parameter.
- * This flag parameter indicates how and if the inode's IO lock and inode lock
- * should be taken.
- *
- * mp -- the mount point structure for the current file system. It points
- * to the inode hash table.
- * tp -- a pointer to the current transaction if there is one. This is
- * simply passed through to the xfs_iread() call.
- * ino -- the number of the inode desired. This is the unique identifier
- * within the file system for the inode being requested.
- * lock_flags -- flags indicating how to lock the inode. See the comment
- * for xfs_ilock() for a list of valid values.
- */
-int
-xfs_iget(
- xfs_mount_t *mp,
- xfs_trans_t *tp,
- xfs_ino_t ino,
- uint flags,
- uint lock_flags,
- xfs_inode_t **ipp)
-{
- xfs_inode_t *ip;
- int error;
- xfs_perag_t *pag;
- xfs_agino_t agino;
-
- /*
- * xfs_reclaim_inode() uses the ILOCK to ensure an inode
- * doesn't get freed while it's being referenced during a
- * radix tree traversal here. It assumes this function
- * aqcuires only the ILOCK (and therefore it has no need to
- * involve the IOLOCK in this synchronization).
- */
- ASSERT((lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) == 0);
-
- /* reject inode numbers outside existing AGs */
- if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount)
- return EINVAL;
-
- /* get the perag structure and ensure that it's inode capable */
- pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino));
- agino = XFS_INO_TO_AGINO(mp, ino);
-
-again:
- error = 0;
- rcu_read_lock();
- ip = radix_tree_lookup(&pag->pag_ici_root, agino);
-
- if (ip) {
- error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags);
- if (error)
- goto out_error_or_again;
- } else {
- rcu_read_unlock();
- XFS_STATS_INC(xs_ig_missed);
-
- error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip,
- flags, lock_flags);
- if (error)
- goto out_error_or_again;
- }
- xfs_perag_put(pag);
-
- *ipp = ip;
-
- /*
- * If we have a real type for an on-disk inode, we can set ops(&unlock)
- * now. If it's a new inode being created, xfs_ialloc will handle it.
- */
- if (xfs_iflags_test(ip, XFS_INEW) && ip->i_d.di_mode != 0)
- xfs_setup_inode(ip);
- return 0;
-
-out_error_or_again:
- if (error == EAGAIN) {
- delay(1);
- goto again;
- }
- xfs_perag_put(pag);
- return error;
-}
-
-/*
- * This is a wrapper routine around the xfs_ilock() routine
- * used to centralize some grungy code. It is used in places
- * that wish to lock the inode solely for reading the extents.
- * The reason these places can't just call xfs_ilock(SHARED)
- * is that the inode lock also guards to bringing in of the
- * extents from disk for a file in b-tree format. If the inode
- * is in b-tree format, then we need to lock the inode exclusively
- * until the extents are read in. Locking it exclusively all
- * the time would limit our parallelism unnecessarily, though.
- * What we do instead is check to see if the extents have been
- * read in yet, and only lock the inode exclusively if they
- * have not.
- *
- * The function returns a value which should be given to the
- * corresponding xfs_iunlock_map_shared(). This value is
- * the mode in which the lock was actually taken.
- */
-uint
-xfs_ilock_map_shared(
- xfs_inode_t *ip)
-{
- uint lock_mode;
-
- if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) &&
- ((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) {
- lock_mode = XFS_ILOCK_EXCL;
- } else {
- lock_mode = XFS_ILOCK_SHARED;
- }
-
- xfs_ilock(ip, lock_mode);
-
- return lock_mode;
-}
-
-/*
- * This is simply the unlock routine to go with xfs_ilock_map_shared().
- * All it does is call xfs_iunlock() with the given lock_mode.
- */
-void
-xfs_iunlock_map_shared(
- xfs_inode_t *ip,
- unsigned int lock_mode)
-{
- xfs_iunlock(ip, lock_mode);
-}
-
-/*
- * The xfs inode contains 2 locks: a multi-reader lock called the
- * i_iolock and a multi-reader lock called the i_lock. This routine
- * allows either or both of the locks to be obtained.
- *
- * The 2 locks should always be ordered so that the IO lock is
- * obtained first in order to prevent deadlock.
- *
- * ip -- the inode being locked
- * lock_flags -- this parameter indicates the inode's locks
- * to be locked. It can be:
- * XFS_IOLOCK_SHARED,
- * XFS_IOLOCK_EXCL,
- * XFS_ILOCK_SHARED,
- * XFS_ILOCK_EXCL,
- * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED,
- * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL,
- * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED,
- * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL
- */
-void
-xfs_ilock(
- xfs_inode_t *ip,
- uint lock_flags)
-{
- /*
- * You can't set both SHARED and EXCL for the same lock,
- * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
- * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
- */
- ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
- (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
- ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
- (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
- ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
-
- if (lock_flags & XFS_IOLOCK_EXCL)
- mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
- else if (lock_flags & XFS_IOLOCK_SHARED)
- mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
-
- if (lock_flags & XFS_ILOCK_EXCL)
- mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
- else if (lock_flags & XFS_ILOCK_SHARED)
- mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
-
- trace_xfs_ilock(ip, lock_flags, _RET_IP_);
-}
-
-/*
- * This is just like xfs_ilock(), except that the caller
- * is guaranteed not to sleep. It returns 1 if it gets
- * the requested locks and 0 otherwise. If the IO lock is
- * obtained but the inode lock cannot be, then the IO lock
- * is dropped before returning.
- *
- * ip -- the inode being locked
- * lock_flags -- this parameter indicates the inode's locks to be
- * to be locked. See the comment for xfs_ilock() for a list
- * of valid values.
- */
-int
-xfs_ilock_nowait(
- xfs_inode_t *ip,
- uint lock_flags)
-{
- /*
- * You can't set both SHARED and EXCL for the same lock,
- * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
- * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
- */
- ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
- (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
- ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
- (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
- ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
-
- if (lock_flags & XFS_IOLOCK_EXCL) {
- if (!mrtryupdate(&ip->i_iolock))
- goto out;
- } else if (lock_flags & XFS_IOLOCK_SHARED) {
- if (!mrtryaccess(&ip->i_iolock))
- goto out;
- }
- if (lock_flags & XFS_ILOCK_EXCL) {
- if (!mrtryupdate(&ip->i_lock))
- goto out_undo_iolock;
- } else if (lock_flags & XFS_ILOCK_SHARED) {
- if (!mrtryaccess(&ip->i_lock))
- goto out_undo_iolock;
- }
- trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_);
- return 1;
-
- out_undo_iolock:
- if (lock_flags & XFS_IOLOCK_EXCL)
- mrunlock_excl(&ip->i_iolock);
- else if (lock_flags & XFS_IOLOCK_SHARED)
- mrunlock_shared(&ip->i_iolock);
- out:
- return 0;
-}
-
-/*
- * xfs_iunlock() is used to drop the inode locks acquired with
- * xfs_ilock() and xfs_ilock_nowait(). The caller must pass
- * in the flags given to xfs_ilock() or xfs_ilock_nowait() so
- * that we know which locks to drop.
- *
- * ip -- the inode being unlocked
- * lock_flags -- this parameter indicates the inode's locks to be
- * to be unlocked. See the comment for xfs_ilock() for a list
- * of valid values for this parameter.
- *
- */
-void
-xfs_iunlock(
- xfs_inode_t *ip,
- uint lock_flags)
-{
- /*
- * You can't set both SHARED and EXCL for the same lock,
- * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
- * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
- */
- ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
- (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
- ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
- (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
- ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
- ASSERT(lock_flags != 0);
-
- if (lock_flags & XFS_IOLOCK_EXCL)
- mrunlock_excl(&ip->i_iolock);
- else if (lock_flags & XFS_IOLOCK_SHARED)
- mrunlock_shared(&ip->i_iolock);
-
- if (lock_flags & XFS_ILOCK_EXCL)
- mrunlock_excl(&ip->i_lock);
- else if (lock_flags & XFS_ILOCK_SHARED)
- mrunlock_shared(&ip->i_lock);
-
- trace_xfs_iunlock(ip, lock_flags, _RET_IP_);
-}
-
-/*
- * give up write locks. the i/o lock cannot be held nested
- * if it is being demoted.
- */
-void
-xfs_ilock_demote(
- xfs_inode_t *ip,
- uint lock_flags)
-{
- ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL));
- ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0);
-
- if (lock_flags & XFS_ILOCK_EXCL)
- mrdemote(&ip->i_lock);
- if (lock_flags & XFS_IOLOCK_EXCL)
- mrdemote(&ip->i_iolock);
-
- trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_);
-}
-
-#ifdef DEBUG
-int
-xfs_isilocked(
- xfs_inode_t *ip,
- uint lock_flags)
-{
- if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) {
- if (!(lock_flags & XFS_ILOCK_SHARED))
- return !!ip->i_lock.mr_writer;
- return rwsem_is_locked(&ip->i_lock.mr_lock);
- }
-
- if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) {
- if (!(lock_flags & XFS_IOLOCK_SHARED))
- return !!ip->i_iolock.mr_writer;
- return rwsem_is_locked(&ip->i_iolock.mr_lock);
- }
-
- ASSERT(0);
- return 0;
-}
-#endif
-
-void
-__xfs_iflock(
- struct xfs_inode *ip)
-{
- wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT);
- DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT);
-
- do {
- prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
- if (xfs_isiflocked(ip))
- io_schedule();
- } while (!xfs_iflock_nowait(ip));
-
- finish_wait(wq, &wait.wait);
-}
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 2778258fcfa2..66282dcb821b 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -45,6 +45,7 @@
#include "xfs_filestream.h"
#include "xfs_vnodeops.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
kmem_zone_t *xfs_ifork_zone;
kmem_zone_t *xfs_inode_zone;
@@ -74,6 +75,256 @@ xfs_get_extsz_hint(
return 0;
}
+/*
+ * This is a wrapper routine around the xfs_ilock() routine used to centralize
+ * some grungy code. It is used in places that wish to lock the inode solely
+ * for reading the extents. The reason these places can't just call
+ * xfs_ilock(SHARED) is that the inode lock also guards to bringing in of the
+ * extents from disk for a file in b-tree format. If the inode is in b-tree
+ * format, then we need to lock the inode exclusively until the extents are read
+ * in. Locking it exclusively all the time would limit our parallelism
+ * unnecessarily, though. What we do instead is check to see if the extents
+ * have been read in yet, and only lock the inode exclusively if they have not.
+ *
+ * The function returns a value which should be given to the corresponding
+ * xfs_iunlock_map_shared(). This value is the mode in which the lock was
+ * actually taken.
+ */
+uint
+xfs_ilock_map_shared(
+ xfs_inode_t *ip)
+{
+ uint lock_mode;
+
+ if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) &&
+ ((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) {
+ lock_mode = XFS_ILOCK_EXCL;
+ } else {
+ lock_mode = XFS_ILOCK_SHARED;
+ }
+
+ xfs_ilock(ip, lock_mode);
+
+ return lock_mode;
+}
+
+/*
+ * This is simply the unlock routine to go with xfs_ilock_map_shared().
+ * All it does is call xfs_iunlock() with the given lock_mode.
+ */
+void
+xfs_iunlock_map_shared(
+ xfs_inode_t *ip,
+ unsigned int lock_mode)
+{
+ xfs_iunlock(ip, lock_mode);
+}
+
+/*
+ * The xfs inode contains 2 locks: a multi-reader lock called the
+ * i_iolock and a multi-reader lock called the i_lock. This routine
+ * allows either or both of the locks to be obtained.
+ *
+ * The 2 locks should always be ordered so that the IO lock is
+ * obtained first in order to prevent deadlock.
+ *
+ * ip -- the inode being locked
+ * lock_flags -- this parameter indicates the inode's locks
+ * to be locked. It can be:
+ * XFS_IOLOCK_SHARED,
+ * XFS_IOLOCK_EXCL,
+ * XFS_ILOCK_SHARED,
+ * XFS_ILOCK_EXCL,
+ * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED,
+ * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL,
+ * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED,
+ * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL
+ */
+void
+xfs_ilock(
+ xfs_inode_t *ip,
+ uint lock_flags)
+{
+ trace_xfs_ilock(ip, lock_flags, _RET_IP_);
+
+ /*
+ * You can't set both SHARED and EXCL for the same lock,
+ * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
+ * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
+ */
+ ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
+ (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
+ ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
+ (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
+ ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
+
+ if (lock_flags & XFS_IOLOCK_EXCL)
+ mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
+ else if (lock_flags & XFS_IOLOCK_SHARED)
+ mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
+
+ if (lock_flags & XFS_ILOCK_EXCL)
+ mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
+ else if (lock_flags & XFS_ILOCK_SHARED)
+ mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
+}
+
+/*
+ * This is just like xfs_ilock(), except that the caller
+ * is guaranteed not to sleep. It returns 1 if it gets
+ * the requested locks and 0 otherwise. If the IO lock is
+ * obtained but the inode lock cannot be, then the IO lock
+ * is dropped before returning.
+ *
+ * ip -- the inode being locked
+ * lock_flags -- this parameter indicates the inode's locks to be
+ * to be locked. See the comment for xfs_ilock() for a list
+ * of valid values.
+ */
+int
+xfs_ilock_nowait(
+ xfs_inode_t *ip,
+ uint lock_flags)
+{
+ trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_);
+
+ /*
+ * You can't set both SHARED and EXCL for the same lock,
+ * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
+ * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
+ */
+ ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
+ (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
+ ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
+ (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
+ ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
+
+ if (lock_flags & XFS_IOLOCK_EXCL) {
+ if (!mrtryupdate(&ip->i_iolock))
+ goto out;
+ } else if (lock_flags & XFS_IOLOCK_SHARED) {
+ if (!mrtryaccess(&ip->i_iolock))
+ goto out;
+ }
+ if (lock_flags & XFS_ILOCK_EXCL) {
+ if (!mrtryupdate(&ip->i_lock))
+ goto out_undo_iolock;
+ } else if (lock_flags & XFS_ILOCK_SHARED) {
+ if (!mrtryaccess(&ip->i_lock))
+ goto out_undo_iolock;
+ }
+ return 1;
+
+ out_undo_iolock:
+ if (lock_flags & XFS_IOLOCK_EXCL)
+ mrunlock_excl(&ip->i_iolock);
+ else if (lock_flags & XFS_IOLOCK_SHARED)
+ mrunlock_shared(&ip->i_iolock);
+ out:
+ return 0;
+}
+
+/*
+ * xfs_iunlock() is used to drop the inode locks acquired with
+ * xfs_ilock() and xfs_ilock_nowait(). The caller must pass
+ * in the flags given to xfs_ilock() or xfs_ilock_nowait() so
+ * that we know which locks to drop.
+ *
+ * ip -- the inode being unlocked
+ * lock_flags -- this parameter indicates the inode's locks to be
+ * to be unlocked. See the comment for xfs_ilock() for a list
+ * of valid values for this parameter.
+ *
+ */
+void
+xfs_iunlock(
+ xfs_inode_t *ip,
+ uint lock_flags)
+{
+ /*
+ * You can't set both SHARED and EXCL for the same lock,
+ * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
+ * and XFS_ILOCK_EXCL are valid values to set in lock_flags.
+ */
+ ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
+ (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
+ ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
+ (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
+ ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
+ ASSERT(lock_flags != 0);
+
+ if (lock_flags & XFS_IOLOCK_EXCL)
+ mrunlock_excl(&ip->i_iolock);
+ else if (lock_flags & XFS_IOLOCK_SHARED)
+ mrunlock_shared(&ip->i_iolock);
+
+ if (lock_flags & XFS_ILOCK_EXCL)
+ mrunlock_excl(&ip->i_lock);
+ else if (lock_flags & XFS_ILOCK_SHARED)
+ mrunlock_shared(&ip->i_lock);
+
+ trace_xfs_iunlock(ip, lock_flags, _RET_IP_);
+}
+
+/*
+ * give up write locks. the i/o lock cannot be held nested
+ * if it is being demoted.
+ */
+void
+xfs_ilock_demote(
+ xfs_inode_t *ip,
+ uint lock_flags)
+{
+ ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL));
+ ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0);
+
+ if (lock_flags & XFS_ILOCK_EXCL)
+ mrdemote(&ip->i_lock);
+ if (lock_flags & XFS_IOLOCK_EXCL)
+ mrdemote(&ip->i_iolock);
+
+ trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_);
+}
+
+#ifdef DEBUG
+int
+xfs_isilocked(
+ xfs_inode_t *ip,
+ uint lock_flags)
+{
+ if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) {
+ if (!(lock_flags & XFS_ILOCK_SHARED))
+ return !!ip->i_lock.mr_writer;
+ return rwsem_is_locked(&ip->i_lock.mr_lock);
+ }
+
+ if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) {
+ if (!(lock_flags & XFS_IOLOCK_SHARED))
+ return !!ip->i_iolock.mr_writer;
+ return rwsem_is_locked(&ip->i_iolock.mr_lock);
+ }
+
+ ASSERT(0);
+ return 0;
+}
+#endif
+
+void
+__xfs_iflock(
+ struct xfs_inode *ip)
+{
+ wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT);
+ DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT);
+
+ do {
+ prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
+ if (xfs_isiflocked(ip))
+ io_schedule();
+ } while (!xfs_iflock_nowait(ip));
+
+ finish_wait(wq, &wait.wait);
+}
+
#ifdef DEBUG
/*
* Make sure that the extents in the given memory buffer
@@ -131,6 +382,65 @@ xfs_inobp_check(
}
#endif
+static void
+xfs_inode_buf_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ int i;
+ int ni;
+
+ /*
+ * Validate the magic number and version of every inode in the buffer
+ */
+ ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock;
+ for (i = 0; i < ni; i++) {
+ int di_ok;
+ xfs_dinode_t *dip;
+
+ dip = (struct xfs_dinode *)xfs_buf_offset(bp,
+ (i << mp->m_sb.sb_inodelog));
+ di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) &&
+ XFS_DINODE_GOOD_VERSION(dip->di_version);
+ if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
+ XFS_ERRTAG_ITOBP_INOTOBP,
+ XFS_RANDOM_ITOBP_INOTOBP))) {
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH,
+ mp, dip);
+#ifdef DEBUG
+ xfs_emerg(mp,
+ "bad inode magic/vsn daddr %lld #%d (magic=%x)",
+ (unsigned long long)bp->b_bn, i,
+ be16_to_cpu(dip->di_magic));
+ ASSERT(0);
+#endif
+ }
+ }
+ xfs_inobp_check(mp, bp);
+}
+
+
+static void
+xfs_inode_buf_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_inode_buf_verify(bp);
+}
+
+static void
+xfs_inode_buf_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_inode_buf_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_inode_buf_ops = {
+ .verify_read = xfs_inode_buf_read_verify,
+ .verify_write = xfs_inode_buf_write_verify,
+};
+
+
/*
* This routine is called to map an inode to the buffer containing the on-disk
* version of the inode. It returns a pointer to the buffer containing the
@@ -145,71 +455,33 @@ xfs_imap_to_bp(
struct xfs_mount *mp,
struct xfs_trans *tp,
struct xfs_imap *imap,
- struct xfs_dinode **dipp,
+ struct xfs_dinode **dipp,
struct xfs_buf **bpp,
uint buf_flags,
uint iget_flags)
{
struct xfs_buf *bp;
int error;
- int i;
- int ni;
buf_flags |= XBF_UNMAPPED;
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno,
- (int)imap->im_len, buf_flags, &bp);
+ (int)imap->im_len, buf_flags, &bp,
+ &xfs_inode_buf_ops);
if (error) {
- if (error != EAGAIN) {
- xfs_warn(mp,
- "%s: xfs_trans_read_buf() returned error %d.",
- __func__, error);
- } else {
+ if (error == EAGAIN) {
ASSERT(buf_flags & XBF_TRYLOCK);
+ return error;
}
- return error;
- }
-
- /*
- * Validate the magic number and version of every inode in the buffer
- * (if DEBUG kernel) or the first inode in the buffer, otherwise.
- */
-#ifdef DEBUG
- ni = BBTOB(imap->im_len) >> mp->m_sb.sb_inodelog;
-#else /* usual case */
- ni = 1;
-#endif
- for (i = 0; i < ni; i++) {
- int di_ok;
- xfs_dinode_t *dip;
+ if (error == EFSCORRUPTED &&
+ (iget_flags & XFS_IGET_UNTRUSTED))
+ return XFS_ERROR(EINVAL);
- dip = (xfs_dinode_t *)xfs_buf_offset(bp,
- (i << mp->m_sb.sb_inodelog));
- di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) &&
- XFS_DINODE_GOOD_VERSION(dip->di_version);
- if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
- XFS_ERRTAG_ITOBP_INOTOBP,
- XFS_RANDOM_ITOBP_INOTOBP))) {
- if (iget_flags & XFS_IGET_UNTRUSTED) {
- xfs_trans_brelse(tp, bp);
- return XFS_ERROR(EINVAL);
- }
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH,
- mp, dip);
-#ifdef DEBUG
- xfs_emerg(mp,
- "bad inode magic/vsn daddr %lld #%d (magic=%x)",
- (unsigned long long)imap->im_blkno, i,
- be16_to_cpu(dip->di_magic));
- ASSERT(0);
-#endif
- xfs_trans_brelse(tp, bp);
- return XFS_ERROR(EFSCORRUPTED);
- }
+ xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.",
+ __func__, error);
+ return error;
}
- xfs_inobp_check(mp, bp);
-
*bpp = bp;
*dipp = (struct xfs_dinode *)xfs_buf_offset(bp, imap->im_boffset);
return 0;
@@ -853,16 +1125,16 @@ xfs_iread_extents(
* set according to the contents of the given cred structure.
*
* Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc()
- * has a free inode available, call xfs_iget()
- * to obtain the in-core version of the allocated inode. Finally,
- * fill in the inode and log its initial contents. In this case,
- * ialloc_context would be set to NULL and call_again set to false.
+ * has a free inode available, call xfs_iget() to obtain the in-core
+ * version of the allocated inode. Finally, fill in the inode and
+ * log its initial contents. In this case, ialloc_context would be
+ * set to NULL.
*
- * If xfs_dialloc() does not have an available inode,
- * it will replenish its supply by doing an allocation. Since we can
- * only do one allocation within a transaction without deadlocks, we
- * must commit the current transaction before returning the inode itself.
- * In this case, therefore, we will set call_again to true and return.
+ * If xfs_dialloc() does not have an available inode, it will replenish
+ * its supply by doing an allocation. Since we can only do one
+ * allocation within a transaction without deadlocks, we must commit
+ * the current transaction before returning the inode itself.
+ * In this case, therefore, we will set ialloc_context and return.
* The caller should then commit the current transaction, start a new
* transaction, and call xfs_ialloc() again to actually get the inode.
*
@@ -1509,10 +1781,23 @@ xfs_ifree_cluster(
* to mark all the active inodes on the buffer stale.
*/
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno,
- mp->m_bsize * blks_per_cluster, 0);
+ mp->m_bsize * blks_per_cluster,
+ XBF_UNMAPPED);
if (!bp)
return ENOMEM;
+
+ /*
+ * This buffer may not have been correctly initialised as we
+ * didn't read it from disk. That's not important because we are
+ * only using to mark the buffer as stale in the log, and to
+ * attach stale cached inodes on it. That means it will never be
+ * dispatched for IO. If it is, we want to know about it, and we
+ * want it to fail. We can acheive this by adding a write
+ * verifier to the buffer.
+ */
+ bp->b_ops = &xfs_inode_buf_ops;
+
/*
* Walk the inodes already attached to the buffer and mark them
* stale. These will all have the flush locks held, so an
@@ -3660,3 +3945,40 @@ xfs_iext_irec_update_extoffs(
ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff;
}
}
+
+/*
+ * Test whether it is appropriate to check an inode for and free post EOF
+ * blocks. The 'force' parameter determines whether we should also consider
+ * regular files that are marked preallocated or append-only.
+ */
+bool
+xfs_can_free_eofblocks(struct xfs_inode *ip, bool force)
+{
+ /* prealloc/delalloc exists only on regular files */
+ if (!S_ISREG(ip->i_d.di_mode))
+ return false;
+
+ /*
+ * Zero sized files with no cached pages and delalloc blocks will not
+ * have speculative prealloc/delalloc blocks to remove.
+ */
+ if (VFS_I(ip)->i_size == 0 &&
+ VN_CACHED(VFS_I(ip)) == 0 &&
+ ip->i_delayed_blks == 0)
+ return false;
+
+ /* If we haven't read in the extent list, then don't do it now. */
+ if (!(ip->i_df.if_flags & XFS_IFEXTENTS))
+ return false;
+
+ /*
+ * Do not free real preallocated or append-only files unless the file
+ * has delalloc blocks and we are forced to remove them.
+ */
+ if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND))
+ if (!force || ip->i_delayed_blks == 0)
+ return false;
+
+ return true;
+}
+
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 94b32f906e79..22baf6ea4fac 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -496,11 +496,10 @@ static inline int xfs_isiflocked(struct xfs_inode *ip)
(((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
((pip)->i_d.di_mode & S_ISGID))
+
/*
- * xfs_iget.c prototypes.
+ * xfs_inode.c prototypes.
*/
-int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
- uint, uint, xfs_inode_t **);
void xfs_ilock(xfs_inode_t *, uint);
int xfs_ilock_nowait(xfs_inode_t *, uint);
void xfs_iunlock(xfs_inode_t *, uint);
@@ -508,11 +507,6 @@ void xfs_ilock_demote(xfs_inode_t *, uint);
int xfs_isilocked(xfs_inode_t *, uint);
uint xfs_ilock_map_shared(xfs_inode_t *);
void xfs_iunlock_map_shared(xfs_inode_t *, uint);
-void xfs_inode_free(struct xfs_inode *ip);
-
-/*
- * xfs_inode.c prototypes.
- */
int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
xfs_nlink_t, xfs_dev_t, prid_t, int,
struct xfs_buf **, xfs_inode_t **);
@@ -591,6 +585,7 @@ void xfs_iext_irec_compact(xfs_ifork_t *);
void xfs_iext_irec_compact_pages(xfs_ifork_t *);
void xfs_iext_irec_compact_full(xfs_ifork_t *);
void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
+bool xfs_can_free_eofblocks(struct xfs_inode *, bool);
#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
@@ -603,5 +598,6 @@ void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
extern struct kmem_zone *xfs_ifork_zone;
extern struct kmem_zone *xfs_inode_zone;
extern struct kmem_zone *xfs_ili_zone;
+extern const struct xfs_buf_ops xfs_inode_buf_ops;
#endif /* __XFS_INODE_H__ */
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 8305f2ac6773..c1c3ef88a260 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -42,6 +42,7 @@
#include "xfs_inode_item.h"
#include "xfs_export.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
#include <linux/capability.h>
#include <linux/dcache.h>
@@ -70,7 +71,7 @@ xfs_find_handle(
int hsize;
xfs_handle_t handle;
struct inode *inode;
- struct fd f;
+ struct fd f = {0};
struct path path;
int error;
struct xfs_inode *ip;
@@ -1602,6 +1603,26 @@ xfs_file_ioctl(
error = xfs_errortag_clearall(mp, 1);
return -error;
+ case XFS_IOC_FREE_EOFBLOCKS: {
+ struct xfs_eofblocks eofb;
+
+ if (copy_from_user(&eofb, arg, sizeof(eofb)))
+ return -XFS_ERROR(EFAULT);
+
+ if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
+ return -XFS_ERROR(EINVAL);
+
+ if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
+ return -XFS_ERROR(EINVAL);
+
+ if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
+ memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
+ return -XFS_ERROR(EINVAL);
+
+ error = xfs_icache_free_eofblocks(mp, &eofb);
+ return -error;
+ }
+
default:
return -ENOTTY;
}
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 973dff6ad935..add06b4e9a63 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -41,6 +41,7 @@
#include "xfs_utils.h"
#include "xfs_iomap.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
#define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \
@@ -373,7 +374,7 @@ xfs_iomap_write_delay(
xfs_extlen_t extsz;
int nimaps;
xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS];
- int prealloc, flushed = 0;
+ int prealloc;
int error;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
@@ -434,31 +435,29 @@ retry:
}
/*
- * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For
- * ENOSPC, * flush all other inodes with delalloc blocks to free up
- * some of the excess reserved metadata space. For both cases, retry
+ * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. Retry
* without EOF preallocation.
*/
if (nimaps == 0) {
trace_xfs_delalloc_enospc(ip, offset, count);
- if (flushed)
- return XFS_ERROR(error ? error : ENOSPC);
-
- if (error == ENOSPC) {
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
- xfs_flush_inodes(ip);
- xfs_ilock(ip, XFS_ILOCK_EXCL);
+ if (prealloc) {
+ prealloc = 0;
+ error = 0;
+ goto retry;
}
-
- flushed = 1;
- error = 0;
- prealloc = 0;
- goto retry;
+ return XFS_ERROR(error ? error : ENOSPC);
}
if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip)))
return xfs_alert_fsblock_zero(ip, &imap[0]);
+ /*
+ * Tag the inode as speculatively preallocated so we can reclaim this
+ * space on demand, if necessary.
+ */
+ if (prealloc)
+ xfs_inode_set_eofblocks_tag(ip);
+
*ret_imap = imap[0];
return 0;
}
@@ -584,7 +583,9 @@ xfs_iomap_write_allocate(
* pointer that the caller gave to us.
*/
error = xfs_bmapi_write(tp, ip, map_start_fsb,
- count_fsb, 0, &first_block, 1,
+ count_fsb,
+ XFS_BMAPI_STACK_SWITCH,
+ &first_block, 1,
imap, &nimaps, &free_list);
if (error)
goto trans_cancel;
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 4e00cf091d2c..d82efaa2ac73 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -38,6 +38,7 @@
#include "xfs_vnodeops.h"
#include "xfs_inode_item.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
#include <linux/capability.h>
#include <linux/xattr.h>
@@ -779,8 +780,8 @@ xfs_setattr_size(
* care about here.
*/
if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
- error = xfs_flush_pages(ip, ip->i_d.di_size, newsize, 0,
- FI_NONE);
+ error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
+ ip->i_d.di_size, newsize);
if (error)
goto out_unlock;
}
@@ -854,6 +855,9 @@ xfs_setattr_size(
* and do not wait the usual (long) time for writeout.
*/
xfs_iflags_set(ip, XFS_ITRUNCATED);
+
+ /* A truncate down always removes post-EOF blocks. */
+ xfs_inode_clear_eofblocks_tag(ip);
}
if (mask & ATTR_CTIME) {
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 01d10a66e302..2ea7d402188d 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -34,6 +34,7 @@
#include "xfs_error.h"
#include "xfs_btree.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
STATIC int
xfs_internal_inum(
@@ -395,7 +396,8 @@ xfs_bulkstat(
if (xfs_inobt_maskn(chunkidx, nicluster)
& ~r.ir_free)
xfs_btree_reada_bufs(mp, agno,
- agbno, nbcluster);
+ agbno, nbcluster,
+ &xfs_inode_buf_ops);
}
irbp->ir_startino = r.ir_startino;
irbp->ir_freecount = r.ir_freecount;
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index 828662f70d64..fe7e4df85a7b 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -44,6 +44,7 @@
#include <linux/kernel.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
+#include <linux/crc32c.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/file.h>
@@ -118,6 +119,7 @@
#define xfs_rotorstep xfs_params.rotorstep.val
#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
+#define xfs_eofb_secs xfs_params.eofb_timer.val
#define current_cpu() (raw_smp_processor_id())
#define current_pid() (current->pid)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 7f4f9370d0e7..46bd9d52ab51 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -34,6 +34,8 @@
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_trace.h"
+#include "xfs_fsops.h"
+#include "xfs_cksum.h"
kmem_zone_t *xfs_log_ticket_zone;
@@ -458,7 +460,8 @@ xfs_log_reserve(
tic->t_trans_type = t_type;
*ticp = tic;
- xlog_grant_push_ail(log, tic->t_unit_res * tic->t_cnt);
+ xlog_grant_push_ail(log, tic->t_cnt ? tic->t_unit_res * tic->t_cnt
+ : tic->t_unit_res);
trace_xfs_log_reserve(log, tic);
@@ -679,25 +682,29 @@ out:
}
/*
- * Finish the recovery of the file system. This is separate from
- * the xfs_log_mount() call, because it depends on the code in
- * xfs_mountfs() to read in the root and real-time bitmap inodes
- * between calling xfs_log_mount() and here.
+ * Finish the recovery of the file system. This is separate from the
+ * xfs_log_mount() call, because it depends on the code in xfs_mountfs() to read
+ * in the root and real-time bitmap inodes between calling xfs_log_mount() and
+ * here.
*
- * mp - ubiquitous xfs mount point structure
+ * If we finish recovery successfully, start the background log work. If we are
+ * not doing recovery, then we have a RO filesystem and we don't need to start
+ * it.
*/
int
xfs_log_mount_finish(xfs_mount_t *mp)
{
- int error;
+ int error = 0;
- if (!(mp->m_flags & XFS_MOUNT_NORECOVERY))
+ if (!(mp->m_flags & XFS_MOUNT_NORECOVERY)) {
error = xlog_recover_finish(mp->m_log);
- else {
- error = 0;
+ if (!error)
+ xfs_log_work_queue(mp);
+ } else {
ASSERT(mp->m_flags & XFS_MOUNT_RDONLY);
}
+
return error;
}
@@ -850,15 +857,49 @@ xfs_log_unmount_write(xfs_mount_t *mp)
} /* xfs_log_unmount_write */
/*
- * Deallocate log structures for unmount/relocation.
+ * Empty the log for unmount/freeze.
+ *
+ * To do this, we first need to shut down the background log work so it is not
+ * trying to cover the log as we clean up. We then need to unpin all objects in
+ * the log so we can then flush them out. Once they have completed their IO and
+ * run the callbacks removing themselves from the AIL, we can write the unmount
+ * record.
+ */
+void
+xfs_log_quiesce(
+ struct xfs_mount *mp)
+{
+ cancel_delayed_work_sync(&mp->m_log->l_work);
+ xfs_log_force(mp, XFS_LOG_SYNC);
+
+ /*
+ * The superblock buffer is uncached and while xfs_ail_push_all_sync()
+ * will push it, xfs_wait_buftarg() will not wait for it. Further,
+ * xfs_buf_iowait() cannot be used because it was pushed with the
+ * XBF_ASYNC flag set, so we need to use a lock/unlock pair to wait for
+ * the IO to complete.
+ */
+ xfs_ail_push_all_sync(mp->m_ail);
+ xfs_wait_buftarg(mp->m_ddev_targp);
+ xfs_buf_lock(mp->m_sb_bp);
+ xfs_buf_unlock(mp->m_sb_bp);
+
+ xfs_log_unmount_write(mp);
+}
+
+/*
+ * Shut down and release the AIL and Log.
*
- * We need to stop the aild from running before we destroy
- * and deallocate the log as the aild references the log.
+ * During unmount, we need to ensure we flush all the dirty metadata objects
+ * from the AIL so that the log is empty before we write the unmount record to
+ * the log. Once this is done, we can tear down the AIL and the log.
*/
void
-xfs_log_unmount(xfs_mount_t *mp)
+xfs_log_unmount(
+ struct xfs_mount *mp)
{
- cancel_delayed_work_sync(&mp->m_sync_work);
+ xfs_log_quiesce(mp);
+
xfs_trans_ail_destroy(mp);
xlog_dealloc_log(mp->m_log);
}
@@ -1090,8 +1131,7 @@ xlog_iodone(xfs_buf_t *bp)
* with it being freed after writing the unmount record to the
* log.
*/
-
-} /* xlog_iodone */
+}
/*
* Return size of each in-core log record buffer.
@@ -1161,6 +1201,40 @@ done:
} /* xlog_get_iclog_buffer_size */
+void
+xfs_log_work_queue(
+ struct xfs_mount *mp)
+{
+ queue_delayed_work(mp->m_log_workqueue, &mp->m_log->l_work,
+ msecs_to_jiffies(xfs_syncd_centisecs * 10));
+}
+
+/*
+ * Every sync period we need to unpin all items in the AIL and push them to
+ * disk. If there is nothing dirty, then we might need to cover the log to
+ * indicate that the filesystem is idle.
+ */
+void
+xfs_log_worker(
+ struct work_struct *work)
+{
+ struct xlog *log = container_of(to_delayed_work(work),
+ struct xlog, l_work);
+ struct xfs_mount *mp = log->l_mp;
+
+ /* dgc: errors ignored - not fatal and nowhere to report them */
+ if (xfs_log_need_covered(mp))
+ xfs_fs_log_dummy(mp);
+ else
+ xfs_log_force(mp, 0);
+
+ /* start pushing all the metadata that is currently dirty */
+ xfs_ail_push_all(mp->m_ail);
+
+ /* queue us up again */
+ xfs_log_work_queue(mp);
+}
+
/*
* This routine initializes some of the log structure for a given mount point.
* Its primary purpose is to fill in enough, so recovery can occur. However,
@@ -1195,6 +1269,7 @@ xlog_alloc_log(
log->l_logBBsize = num_bblks;
log->l_covered_state = XLOG_STATE_COVER_IDLE;
log->l_flags |= XLOG_ACTIVE_RECOVERY;
+ INIT_DELAYED_WORK(&log->l_work, xfs_log_worker);
log->l_prev_block = -1;
/* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */
@@ -1417,6 +1492,84 @@ xlog_grant_push_ail(
}
/*
+ * Stamp cycle number in every block
+ */
+STATIC void
+xlog_pack_data(
+ struct xlog *log,
+ struct xlog_in_core *iclog,
+ int roundoff)
+{
+ int i, j, k;
+ int size = iclog->ic_offset + roundoff;
+ __be32 cycle_lsn;
+ xfs_caddr_t dp;
+
+ cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn);
+
+ dp = iclog->ic_datap;
+ for (i = 0; i < BTOBB(size); i++) {
+ if (i >= (XLOG_HEADER_CYCLE_SIZE / BBSIZE))
+ break;
+ iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp;
+ *(__be32 *)dp = cycle_lsn;
+ dp += BBSIZE;
+ }
+
+ if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) {
+ xlog_in_core_2_t *xhdr = iclog->ic_data;
+
+ for ( ; i < BTOBB(size); i++) {
+ j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
+ k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
+ xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp;
+ *(__be32 *)dp = cycle_lsn;
+ dp += BBSIZE;
+ }
+
+ for (i = 1; i < log->l_iclog_heads; i++)
+ xhdr[i].hic_xheader.xh_cycle = cycle_lsn;
+ }
+}
+
+/*
+ * Calculate the checksum for a log buffer.
+ *
+ * This is a little more complicated than it should be because the various
+ * headers and the actual data are non-contiguous.
+ */
+__le32
+xlog_cksum(
+ struct xlog *log,
+ struct xlog_rec_header *rhead,
+ char *dp,
+ int size)
+{
+ __uint32_t crc;
+
+ /* first generate the crc for the record header ... */
+ crc = xfs_start_cksum((char *)rhead,
+ sizeof(struct xlog_rec_header),
+ offsetof(struct xlog_rec_header, h_crc));
+
+ /* ... then for additional cycle data for v2 logs ... */
+ if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) {
+ union xlog_in_core2 *xhdr = (union xlog_in_core2 *)rhead;
+ int i;
+
+ for (i = 1; i < log->l_iclog_heads; i++) {
+ crc = crc32c(crc, &xhdr[i].hic_xheader,
+ sizeof(struct xlog_rec_ext_header));
+ }
+ }
+
+ /* ... and finally for the payload */
+ crc = crc32c(crc, dp, size);
+
+ return xfs_end_cksum(crc);
+}
+
+/*
* The bdstrat callback function for log bufs. This gives us a central
* place to trap bufs in case we get hit by a log I/O error and need to
* shutdown. Actually, in practice, even when we didn't get a log error,
@@ -1476,7 +1629,6 @@ xlog_sync(
struct xlog *log,
struct xlog_in_core *iclog)
{
- xfs_caddr_t dptr; /* pointer to byte sized element */
xfs_buf_t *bp;
int i;
uint count; /* byte count of bwrite */
@@ -1485,6 +1637,7 @@ xlog_sync(
int split = 0; /* split write into two regions */
int error;
int v2 = xfs_sb_version_haslogv2(&log->l_mp->m_sb);
+ int size;
XFS_STATS_INC(xs_log_writes);
ASSERT(atomic_read(&iclog->ic_refcnt) == 0);
@@ -1515,13 +1668,10 @@ xlog_sync(
xlog_pack_data(log, iclog, roundoff);
/* real byte length */
- if (v2) {
- iclog->ic_header.h_len =
- cpu_to_be32(iclog->ic_offset + roundoff);
- } else {
- iclog->ic_header.h_len =
- cpu_to_be32(iclog->ic_offset);
- }
+ size = iclog->ic_offset;
+ if (v2)
+ size += roundoff;
+ iclog->ic_header.h_len = cpu_to_be32(size);
bp = iclog->ic_bp;
XFS_BUF_SET_ADDR(bp, BLOCK_LSN(be64_to_cpu(iclog->ic_header.h_lsn)));
@@ -1530,12 +1680,36 @@ xlog_sync(
/* Do we need to split this write into 2 parts? */
if (XFS_BUF_ADDR(bp) + BTOBB(count) > log->l_logBBsize) {
+ char *dptr;
+
split = count - (BBTOB(log->l_logBBsize - XFS_BUF_ADDR(bp)));
count = BBTOB(log->l_logBBsize - XFS_BUF_ADDR(bp));
- iclog->ic_bwritecnt = 2; /* split into 2 writes */
+ iclog->ic_bwritecnt = 2;
+
+ /*
+ * Bump the cycle numbers at the start of each block in the
+ * part of the iclog that ends up in the buffer that gets
+ * written to the start of the log.
+ *
+ * Watch out for the header magic number case, though.
+ */
+ dptr = (char *)&iclog->ic_header + count;
+ for (i = 0; i < split; i += BBSIZE) {
+ __uint32_t cycle = be32_to_cpu(*(__be32 *)dptr);
+ if (++cycle == XLOG_HEADER_MAGIC_NUM)
+ cycle++;
+ *(__be32 *)dptr = cpu_to_be32(cycle);
+
+ dptr += BBSIZE;
+ }
} else {
iclog->ic_bwritecnt = 1;
}
+
+ /* calculcate the checksum */
+ iclog->ic_header.h_crc = xlog_cksum(log, &iclog->ic_header,
+ iclog->ic_datap, size);
+
bp->b_io_length = BTOBB(count);
bp->b_fspriv = iclog;
XFS_BUF_ZEROFLAGS(bp);
@@ -1589,19 +1763,6 @@ xlog_sync(
bp->b_flags |= XBF_SYNCIO;
if (log->l_mp->m_flags & XFS_MOUNT_BARRIER)
bp->b_flags |= XBF_FUA;
- dptr = bp->b_addr;
- /*
- * Bump the cycle numbers at the start of each block
- * since this part of the buffer is at the start of
- * a new cycle. Watch out for the header magic number
- * case, though.
- */
- for (i = 0; i < split; i += BBSIZE) {
- be32_add_cpu((__be32 *)dptr, 1);
- if (be32_to_cpu(*(__be32 *)dptr) == XLOG_HEADER_MAGIC_NUM)
- be32_add_cpu((__be32 *)dptr, 1);
- dptr += BBSIZE;
- }
ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1);
ASSERT(XFS_BUF_ADDR(bp) + BTOBB(count) <= log->l_logBBsize);
@@ -1618,7 +1779,6 @@ xlog_sync(
return 0;
} /* xlog_sync */
-
/*
* Deallocate a log structure
*/
@@ -2387,14 +2547,27 @@ xlog_state_do_callback(
/*
- * update the last_sync_lsn before we drop the
+ * Completion of a iclog IO does not imply that
+ * a transaction has completed, as transactions
+ * can be large enough to span many iclogs. We
+ * cannot change the tail of the log half way
+ * through a transaction as this may be the only
+ * transaction in the log and moving th etail to
+ * point to the middle of it will prevent
+ * recovery from finding the start of the
+ * transaction. Hence we should only update the
+ * last_sync_lsn if this iclog contains
+ * transaction completion callbacks on it.
+ *
+ * We have to do this before we drop the
* icloglock to ensure we are the only one that
* can update it.
*/
ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn),
be64_to_cpu(iclog->ic_header.h_lsn)) <= 0);
- atomic64_set(&log->l_last_sync_lsn,
- be64_to_cpu(iclog->ic_header.h_lsn));
+ if (iclog->ic_callback)
+ atomic64_set(&log->l_last_sync_lsn,
+ be64_to_cpu(iclog->ic_header.h_lsn));
} else
ioerrors++;
@@ -3700,3 +3873,4 @@ xlog_iclogs_empty(
} while (iclog != log->l_iclog);
return 1;
}
+
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index 748d312850e2..5caee96059df 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -181,5 +181,9 @@ int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_lsn_t *commit_lsn, int flags);
bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
+void xfs_log_work_queue(struct xfs_mount *mp);
+void xfs_log_worker(struct work_struct *work);
+void xfs_log_quiesce(struct xfs_mount *mp);
+
#endif
#endif /* __XFS_LOG_H__ */
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 18a801d76a42..16d8d12ea3b4 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -139,7 +139,6 @@ static inline uint xlog_get_client_id(__be32 i)
/*
* Flags for log structure
*/
-#define XLOG_CHKSUM_MISMATCH 0x1 /* used only during recovery */
#define XLOG_ACTIVE_RECOVERY 0x2 /* in the middle of recovery */
#define XLOG_RECOVERY_NEEDED 0x4 /* log was recovered */
#define XLOG_IO_ERROR 0x8 /* log hit an I/O error, and being
@@ -291,7 +290,7 @@ typedef struct xlog_rec_header {
__be32 h_len; /* len in bytes; should be 64-bit aligned: 4 */
__be64 h_lsn; /* lsn of this LR : 8 */
__be64 h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */
- __be32 h_chksum; /* may not be used; non-zero if used : 4 */
+ __le32 h_crc; /* crc of log record : 4 */
__be32 h_prev_block; /* block number to previous LR : 4 */
__be32 h_num_logops; /* number of log operations in this LR : 4 */
__be32 h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE];
@@ -495,6 +494,7 @@ struct xlog {
struct xfs_buf *l_xbuf; /* extra buffer for log
* wrapping */
struct xfs_buftarg *l_targ; /* buftarg of log */
+ struct delayed_work l_work; /* background flush work */
uint l_flags;
uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */
struct list_head *l_buf_cancel_table;
@@ -554,11 +554,9 @@ xlog_recover(
extern int
xlog_recover_finish(
struct xlog *log);
-extern void
-xlog_pack_data(
- struct xlog *log,
- struct xlog_in_core *iclog,
- int);
+
+extern __le32 xlog_cksum(struct xlog *log, struct xlog_rec_header *rhead,
+ char *dp, int size);
extern kmem_zone_t *xfs_log_ticket_zone;
struct xlog_ticket *
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 5da3ace352bf..96fcbb85ff83 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -41,7 +41,9 @@
#include "xfs_trans_priv.h"
#include "xfs_quota.h"
#include "xfs_utils.h"
+#include "xfs_cksum.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
STATIC int
xlog_find_zeroed(
@@ -2143,7 +2145,7 @@ xlog_recover_buffer_pass2(
buf_flags |= XBF_UNMAPPED;
bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len,
- buf_flags);
+ buf_flags, NULL);
if (!bp)
return XFS_ERROR(ENOMEM);
error = bp->b_error;
@@ -2236,7 +2238,8 @@ xlog_recover_inode_pass2(
}
trace_xfs_log_recover_inode_recover(log, in_f);
- bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0);
+ bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0,
+ NULL);
if (!bp) {
error = ENOMEM;
goto error;
@@ -2547,7 +2550,8 @@ xlog_recover_dquot_pass2(
ASSERT(dq_f->qlf_len == 1);
error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno,
- XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp);
+ XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp,
+ NULL);
if (error)
return error;
@@ -3213,80 +3217,58 @@ xlog_recover_process_iunlinks(
mp->m_dmevmask = mp_dmevmask;
}
-
-#ifdef DEBUG
-STATIC void
-xlog_pack_data_checksum(
- struct xlog *log,
- struct xlog_in_core *iclog,
- int size)
-{
- int i;
- __be32 *up;
- uint chksum = 0;
-
- up = (__be32 *)iclog->ic_datap;
- /* divide length by 4 to get # words */
- for (i = 0; i < (size >> 2); i++) {
- chksum ^= be32_to_cpu(*up);
- up++;
- }
- iclog->ic_header.h_chksum = cpu_to_be32(chksum);
-}
-#else
-#define xlog_pack_data_checksum(log, iclog, size)
-#endif
-
/*
- * Stamp cycle number in every block
+ * Upack the log buffer data and crc check it. If the check fails, issue a
+ * warning if and only if the CRC in the header is non-zero. This makes the
+ * check an advisory warning, and the zero CRC check will prevent failure
+ * warnings from being emitted when upgrading the kernel from one that does not
+ * add CRCs by default.
+ *
+ * When filesystems are CRC enabled, this CRC mismatch becomes a fatal log
+ * corruption failure
*/
-void
-xlog_pack_data(
- struct xlog *log,
- struct xlog_in_core *iclog,
- int roundoff)
+STATIC int
+xlog_unpack_data_crc(
+ struct xlog_rec_header *rhead,
+ xfs_caddr_t dp,
+ struct xlog *log)
{
- int i, j, k;
- int size = iclog->ic_offset + roundoff;
- __be32 cycle_lsn;
- xfs_caddr_t dp;
-
- xlog_pack_data_checksum(log, iclog, size);
-
- cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn);
-
- dp = iclog->ic_datap;
- for (i = 0; i < BTOBB(size) &&
- i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) {
- iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp;
- *(__be32 *)dp = cycle_lsn;
- dp += BBSIZE;
- }
-
- if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) {
- xlog_in_core_2_t *xhdr = iclog->ic_data;
-
- for ( ; i < BTOBB(size); i++) {
- j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
- k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE);
- xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp;
- *(__be32 *)dp = cycle_lsn;
- dp += BBSIZE;
+ __le32 crc;
+
+ crc = xlog_cksum(log, rhead, dp, be32_to_cpu(rhead->h_len));
+ if (crc != rhead->h_crc) {
+ if (rhead->h_crc || xfs_sb_version_hascrc(&log->l_mp->m_sb)) {
+ xfs_alert(log->l_mp,
+ "log record CRC mismatch: found 0x%x, expected 0x%x.\n",
+ le32_to_cpu(rhead->h_crc),
+ le32_to_cpu(crc));
+ xfs_hex_dump(dp, 32);
}
- for (i = 1; i < log->l_iclog_heads; i++) {
- xhdr[i].hic_xheader.xh_cycle = cycle_lsn;
- }
+ /*
+ * If we've detected a log record corruption, then we can't
+ * recover past this point. Abort recovery if we are enforcing
+ * CRC protection by punting an error back up the stack.
+ */
+ if (xfs_sb_version_hascrc(&log->l_mp->m_sb))
+ return EFSCORRUPTED;
}
+
+ return 0;
}
-STATIC void
+STATIC int
xlog_unpack_data(
struct xlog_rec_header *rhead,
xfs_caddr_t dp,
struct xlog *log)
{
int i, j, k;
+ int error;
+
+ error = xlog_unpack_data_crc(rhead, dp, log);
+ if (error)
+ return error;
for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) &&
i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) {
@@ -3303,6 +3285,8 @@ xlog_unpack_data(
dp += BBSIZE;
}
}
+
+ return 0;
}
STATIC int
@@ -3434,9 +3418,13 @@ xlog_do_recovery_pass(
if (error)
goto bread_err2;
- xlog_unpack_data(rhead, offset, log);
- if ((error = xlog_recover_process_data(log,
- rhash, rhead, offset, pass)))
+ error = xlog_unpack_data(rhead, offset, log);
+ if (error)
+ goto bread_err2;
+
+ error = xlog_recover_process_data(log,
+ rhash, rhead, offset, pass);
+ if (error)
goto bread_err2;
blk_no += bblks + hblks;
}
@@ -3541,14 +3529,19 @@ xlog_do_recovery_pass(
* - order is important.
*/
error = xlog_bread_offset(log, 0,
- bblks - split_bblks, hbp,
+ bblks - split_bblks, dbp,
offset + BBTOB(split_bblks));
if (error)
goto bread_err2;
}
- xlog_unpack_data(rhead, offset, log);
- if ((error = xlog_recover_process_data(log, rhash,
- rhead, offset, pass)))
+
+ error = xlog_unpack_data(rhead, offset, log);
+ if (error)
+ goto bread_err2;
+
+ error = xlog_recover_process_data(log, rhash,
+ rhead, offset, pass);
+ if (error)
goto bread_err2;
blk_no += bblks;
}
@@ -3573,9 +3566,13 @@ xlog_do_recovery_pass(
if (error)
goto bread_err2;
- xlog_unpack_data(rhead, offset, log);
- if ((error = xlog_recover_process_data(log, rhash,
- rhead, offset, pass)))
+ error = xlog_unpack_data(rhead, offset, log);
+ if (error)
+ goto bread_err2;
+
+ error = xlog_recover_process_data(log, rhash,
+ rhead, offset, pass);
+ if (error)
goto bread_err2;
blk_no += bblks + hblks;
}
@@ -3689,13 +3686,14 @@ xlog_do_recover(
/*
* Now that we've finished replaying all buffer and inode
- * updates, re-read in the superblock.
+ * updates, re-read in the superblock and reverify it.
*/
bp = xfs_getsb(log->l_mp, 0);
XFS_BUF_UNDONE(bp);
ASSERT(!(XFS_BUF_ISWRITE(bp)));
XFS_BUF_READ(bp);
XFS_BUF_UNASYNC(bp);
+ bp->b_ops = &xfs_sb_buf_ops;
xfsbdstrat(log->l_mp, bp);
error = xfs_buf_iowait(bp);
if (error) {
@@ -3707,7 +3705,7 @@ xlog_do_recover(
/* Convert superblock from on-disk format */
sbp = &log->l_mp->m_sb;
- xfs_sb_from_disk(log->l_mp, XFS_BUF_TO_SBP(bp));
+ xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp));
ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC);
ASSERT(xfs_sb_good_version(sbp));
xfs_buf_relse(bp);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index b2bd3a0e6376..da508463ff10 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -42,6 +42,7 @@
#include "xfs_fsops.h"
#include "xfs_utils.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
#ifdef HAVE_PERCPU_SB
@@ -303,9 +304,8 @@ STATIC int
xfs_mount_validate_sb(
xfs_mount_t *mp,
xfs_sb_t *sbp,
- int flags)
+ bool check_inprogress)
{
- int loud = !(flags & XFS_MFSI_QUIET);
/*
* If the log device and data device have the
@@ -315,21 +315,18 @@ xfs_mount_validate_sb(
* a volume filesystem in a non-volume manner.
*/
if (sbp->sb_magicnum != XFS_SB_MAGIC) {
- if (loud)
- xfs_warn(mp, "bad magic number");
+ xfs_warn(mp, "bad magic number");
return XFS_ERROR(EWRONGFS);
}
if (!xfs_sb_good_version(sbp)) {
- if (loud)
- xfs_warn(mp, "bad version");
+ xfs_warn(mp, "bad version");
return XFS_ERROR(EWRONGFS);
}
if (unlikely(
sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
- if (loud)
- xfs_warn(mp,
+ xfs_warn(mp,
"filesystem is marked as having an external log; "
"specify logdev on the mount command line.");
return XFS_ERROR(EINVAL);
@@ -337,8 +334,7 @@ xfs_mount_validate_sb(
if (unlikely(
sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
- if (loud)
- xfs_warn(mp,
+ xfs_warn(mp,
"filesystem is marked as having an internal log; "
"do not specify logdev on the mount command line.");
return XFS_ERROR(EINVAL);
@@ -372,8 +368,7 @@ xfs_mount_validate_sb(
sbp->sb_dblocks == 0 ||
sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) {
- if (loud)
- XFS_CORRUPTION_ERROR("SB sanity check failed",
+ XFS_CORRUPTION_ERROR("SB sanity check failed",
XFS_ERRLEVEL_LOW, mp, sbp);
return XFS_ERROR(EFSCORRUPTED);
}
@@ -382,12 +377,10 @@ xfs_mount_validate_sb(
* Until this is fixed only page-sized or smaller data blocks work.
*/
if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
- if (loud) {
- xfs_warn(mp,
+ xfs_warn(mp,
"File system with blocksize %d bytes. "
"Only pagesize (%ld) or less will currently work.",
sbp->sb_blocksize, PAGE_SIZE);
- }
return XFS_ERROR(ENOSYS);
}
@@ -401,23 +394,20 @@ xfs_mount_validate_sb(
case 2048:
break;
default:
- if (loud)
- xfs_warn(mp, "inode size of %d bytes not supported",
+ xfs_warn(mp, "inode size of %d bytes not supported",
sbp->sb_inodesize);
return XFS_ERROR(ENOSYS);
}
if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
- if (loud)
- xfs_warn(mp,
+ xfs_warn(mp,
"file system too large to be mounted on this system.");
return XFS_ERROR(EFBIG);
}
- if (unlikely(sbp->sb_inprogress)) {
- if (loud)
- xfs_warn(mp, "file system busy");
+ if (check_inprogress && sbp->sb_inprogress) {
+ xfs_warn(mp, "Offline file system operation in progress!");
return XFS_ERROR(EFSCORRUPTED);
}
@@ -425,9 +415,7 @@ xfs_mount_validate_sb(
* Version 1 directory format has never worked on Linux.
*/
if (unlikely(!xfs_sb_version_hasdirv2(sbp))) {
- if (loud)
- xfs_warn(mp,
- "file system using version 1 directory format");
+ xfs_warn(mp, "file system using version 1 directory format");
return XFS_ERROR(ENOSYS);
}
@@ -520,11 +508,9 @@ out_unwind:
void
xfs_sb_from_disk(
- struct xfs_mount *mp,
+ struct xfs_sb *to,
xfs_dsb_t *from)
{
- struct xfs_sb *to = &mp->m_sb;
-
to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
@@ -626,6 +612,72 @@ xfs_sb_to_disk(
}
}
+static void
+xfs_sb_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_sb sb;
+ int error;
+
+ xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp));
+
+ /*
+ * Only check the in progress field for the primary superblock as
+ * mkfs.xfs doesn't clear it from secondary superblocks.
+ */
+ error = xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR);
+ if (error)
+ xfs_buf_ioerror(bp, error);
+}
+
+static void
+xfs_sb_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_sb_verify(bp);
+}
+
+/*
+ * We may be probed for a filesystem match, so we may not want to emit
+ * messages when the superblock buffer is not actually an XFS superblock.
+ * If we find an XFS superblock, the run a normal, noisy mount because we are
+ * really going to mount it and want to know about errors.
+ */
+static void
+xfs_sb_quiet_read_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_sb sb;
+
+ xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp));
+
+ if (sb.sb_magicnum == XFS_SB_MAGIC) {
+ /* XFS filesystem, verify noisily! */
+ xfs_sb_read_verify(bp);
+ return;
+ }
+ /* quietly fail */
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+}
+
+static void
+xfs_sb_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_sb_verify(bp);
+}
+
+const struct xfs_buf_ops xfs_sb_buf_ops = {
+ .verify_read = xfs_sb_read_verify,
+ .verify_write = xfs_sb_write_verify,
+};
+
+static const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
+ .verify_read = xfs_sb_quiet_read_verify,
+ .verify_write = xfs_sb_write_verify,
+};
+
/*
* xfs_readsb
*
@@ -651,26 +703,27 @@ xfs_readsb(xfs_mount_t *mp, int flags)
reread:
bp = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR,
- BTOBB(sector_size), 0);
+ BTOBB(sector_size), 0,
+ loud ? &xfs_sb_buf_ops
+ : &xfs_sb_quiet_buf_ops);
if (!bp) {
if (loud)
xfs_warn(mp, "SB buffer read failed");
return EIO;
}
-
- /*
- * Initialize the mount structure from the superblock.
- * But first do some basic consistency checking.
- */
- xfs_sb_from_disk(mp, XFS_BUF_TO_SBP(bp));
- error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags);
- if (error) {
+ if (bp->b_error) {
+ error = bp->b_error;
if (loud)
xfs_warn(mp, "SB validate failed");
goto release_buf;
}
/*
+ * Initialize the mount structure from the superblock.
+ */
+ xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp));
+
+ /*
* We must be able to do sector-sized and sector-aligned IO.
*/
if (sector_size > mp->m_sb.sb_sectsize) {
@@ -1001,7 +1054,7 @@ xfs_check_sizes(xfs_mount_t *mp)
}
bp = xfs_buf_read_uncached(mp->m_ddev_targp,
d - XFS_FSS_TO_BB(mp, 1),
- XFS_FSS_TO_BB(mp, 1), 0);
+ XFS_FSS_TO_BB(mp, 1), 0, NULL);
if (!bp) {
xfs_warn(mp, "last sector read failed");
return EIO;
@@ -1016,7 +1069,7 @@ xfs_check_sizes(xfs_mount_t *mp)
}
bp = xfs_buf_read_uncached(mp->m_logdev_targp,
d - XFS_FSB_TO_BB(mp, 1),
- XFS_FSB_TO_BB(mp, 1), 0);
+ XFS_FSB_TO_BB(mp, 1), 0, NULL);
if (!bp) {
xfs_warn(mp, "log device read failed");
return EIO;
@@ -1427,6 +1480,8 @@ xfs_unmountfs(
__uint64_t resblks;
int error;
+ cancel_delayed_work_sync(&mp->m_eofblocks_work);
+
xfs_qm_unmount_quotas(mp);
xfs_rtunmount_inodes(mp);
IRELE(mp->m_rootip);
@@ -1450,21 +1505,16 @@ xfs_unmountfs(
/*
* And reclaim all inodes. At this point there should be no dirty
- * inode, and none should be pinned or locked, but use synchronous
- * reclaim just to be sure.
+ * inodes and none should be pinned or locked, but use synchronous
+ * reclaim just to be sure. We can stop background inode reclaim
+ * here as well if it is still running.
*/
+ cancel_delayed_work_sync(&mp->m_reclaim_work);
xfs_reclaim_inodes(mp, SYNC_WAIT);
xfs_qm_unmount(mp);
/*
- * Flush out the log synchronously so that we know for sure
- * that nothing is pinned. This is important because bflush()
- * will skip pinned buffers.
- */
- xfs_log_force(mp, XFS_LOG_SYNC);
-
- /*
* Unreserve any blocks we have so that when we unmount we don't account
* the reserved free space as used. This is really only necessary for
* lazy superblock counting because it trusts the incore superblock
@@ -1489,23 +1539,6 @@ xfs_unmountfs(
xfs_warn(mp, "Unable to update superblock counters. "
"Freespace may not be correct on next mount.");
- /*
- * At this point we might have modified the superblock again and thus
- * added an item to the AIL, thus flush it again.
- */
- xfs_ail_push_all_sync(mp->m_ail);
- xfs_wait_buftarg(mp->m_ddev_targp);
-
- /*
- * The superblock buffer is uncached and xfsaild_push() will lock and
- * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait()
- * here but a lock on the superblock buffer will block until iodone()
- * has completed.
- */
- xfs_buf_lock(mp->m_sb_bp);
- xfs_buf_unlock(mp->m_sb_bp);
-
- xfs_log_unmount_write(mp);
xfs_log_unmount(mp);
xfs_uuid_unmount(mp);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index deee09e534dc..bab8314507e4 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -51,8 +51,6 @@ typedef struct xfs_trans_reservations {
#else /* __KERNEL__ */
-#include "xfs_sync.h"
-
struct xlog;
struct xfs_inode;
struct xfs_mru_cache;
@@ -197,9 +195,9 @@ typedef struct xfs_mount {
struct mutex m_icsb_mutex; /* balancer sync lock */
#endif
struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
- struct delayed_work m_sync_work; /* background sync work */
struct delayed_work m_reclaim_work; /* background inode reclaim */
- struct work_struct m_flush_work; /* background inode flush */
+ struct delayed_work m_eofblocks_work; /* background eof blocks
+ trimming */
__int64_t m_update_flags; /* sb flags we need to update
on the next remount,rw */
struct shrinker m_inode_shrink; /* inode reclaim shrinker */
@@ -209,6 +207,9 @@ typedef struct xfs_mount {
struct workqueue_struct *m_data_workqueue;
struct workqueue_struct *m_unwritten_workqueue;
struct workqueue_struct *m_cil_workqueue;
+ struct workqueue_struct *m_reclaim_workqueue;
+ struct workqueue_struct *m_log_workqueue;
+ struct workqueue_struct *m_eofblocks_workqueue;
} xfs_mount_t;
/*
@@ -387,7 +388,9 @@ extern void xfs_set_low_space_thresholds(struct xfs_mount *);
extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
xfs_agnumber_t *);
-extern void xfs_sb_from_disk(struct xfs_mount *, struct xfs_dsb *);
+extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
+extern const struct xfs_buf_ops xfs_sb_buf_ops;
+
#endif /* __XFS_MOUNT_H__ */
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 2e86fa0cfc0d..60eff4763156 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -40,6 +40,7 @@
#include "xfs_utils.h"
#include "xfs_qm.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
/*
* The global quota manager. There is only one of these for the entire
@@ -891,7 +892,8 @@ xfs_qm_dqiter_bufs(
while (blkcnt--) {
error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
XFS_FSB_TO_DADDR(mp, bno),
- mp->m_quotainfo->qi_dqchunklen, 0, &bp);
+ mp->m_quotainfo->qi_dqchunklen, 0, &bp,
+ &xfs_dquot_buf_ops);
if (error)
break;
@@ -978,7 +980,8 @@ xfs_qm_dqiterate(
while (rablkcnt--) {
xfs_buf_readahead(mp->m_ddev_targp,
XFS_FSB_TO_DADDR(mp, rablkno),
- mp->m_quotainfo->qi_dqchunklen);
+ mp->m_quotainfo->qi_dqchunklen,
+ NULL);
rablkno++;
}
}
@@ -1453,7 +1456,7 @@ xfs_qm_dqreclaim_one(
int error;
if (!xfs_dqlock_nowait(dqp))
- goto out_busy;
+ goto out_move_tail;
/*
* This dquot has acquired a reference in the meantime remove it from
@@ -1476,7 +1479,7 @@ xfs_qm_dqreclaim_one(
* getting flushed to disk, we don't want to reclaim it.
*/
if (!xfs_dqflock_nowait(dqp))
- goto out_busy;
+ goto out_unlock_move_tail;
if (XFS_DQ_IS_DIRTY(dqp)) {
struct xfs_buf *bp = NULL;
@@ -1487,7 +1490,7 @@ xfs_qm_dqreclaim_one(
if (error) {
xfs_warn(mp, "%s: dquot %p flush failed",
__func__, dqp);
- goto out_busy;
+ goto out_unlock_move_tail;
}
xfs_buf_delwri_queue(bp, buffer_list);
@@ -1496,7 +1499,7 @@ xfs_qm_dqreclaim_one(
* Give the dquot another try on the freelist, as the
* flushing will take some time.
*/
- goto out_busy;
+ goto out_unlock_move_tail;
}
xfs_dqfunlock(dqp);
@@ -1515,14 +1518,13 @@ xfs_qm_dqreclaim_one(
XFS_STATS_INC(xs_qm_dqreclaims);
return;
-out_busy:
- xfs_dqunlock(dqp);
-
/*
* Move the dquot to the tail of the list so that we don't spin on it.
*/
+out_unlock_move_tail:
+ xfs_dqunlock(dqp);
+out_move_tail:
list_move_tail(&dqp->q_lru, &qi->qi_lru_list);
-
trace_xfs_dqreclaim_busy(dqp);
XFS_STATS_INC(xs_qm_dqreclaim_misses);
}
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 858a3b186110..8a59f8546552 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -40,6 +40,7 @@
#include "xfs_utils.h"
#include "xfs_qm.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
@@ -783,11 +784,11 @@ xfs_qm_scall_getquota(
(XFS_IS_OQUOTA_ENFORCED(mp) &&
(dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
dst->d_id != 0) {
- if (((int) dst->d_bcount > (int) dst->d_blk_softlimit) &&
+ if ((dst->d_bcount > dst->d_blk_softlimit) &&
(dst->d_blk_softlimit > 0)) {
ASSERT(dst->d_btimer != 0);
}
- if (((int) dst->d_icount > (int) dst->d_ino_softlimit) &&
+ if ((dst->d_icount > dst->d_ino_softlimit) &&
(dst->d_ino_softlimit > 0)) {
ASSERT(dst->d_itimer != 0);
}
@@ -845,7 +846,8 @@ STATIC int
xfs_dqrele_inode(
struct xfs_inode *ip,
struct xfs_perag *pag,
- int flags)
+ int flags,
+ void *args)
{
/* skip quota inodes */
if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
@@ -881,5 +883,5 @@ xfs_qm_dqrele_all_inodes(
uint flags)
{
ASSERT(mp->m_quotainfo);
- xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags);
+ xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags, NULL);
}
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index ca28a4ba4b54..98dc670d3ee0 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -38,6 +38,7 @@
#include "xfs_utils.h"
#include "xfs_trace.h"
#include "xfs_buf.h"
+#include "xfs_icache.h"
/*
@@ -869,7 +870,7 @@ xfs_rtbuf_get(
ASSERT(map.br_startblock != NULLFSBLOCK);
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
XFS_FSB_TO_DADDR(mp, map.br_startblock),
- mp->m_bsize, 0, &bp);
+ mp->m_bsize, 0, &bp, NULL);
if (error)
return error;
ASSERT(!xfs_buf_geterror(bp));
@@ -1872,9 +1873,14 @@ xfs_growfs_rt(
*/
bp = xfs_buf_read_uncached(mp->m_rtdev_targp,
XFS_FSB_TO_BB(mp, nrblocks - 1),
- XFS_FSB_TO_BB(mp, 1), 0);
+ XFS_FSB_TO_BB(mp, 1), 0, NULL);
if (!bp)
return EIO;
+ if (bp->b_error) {
+ error = bp->b_error;
+ xfs_buf_relse(bp);
+ return error;
+ }
xfs_buf_relse(bp);
/*
@@ -2219,9 +2225,11 @@ xfs_rtmount_init(
}
bp = xfs_buf_read_uncached(mp->m_rtdev_targp,
d - XFS_FSB_TO_BB(mp, 1),
- XFS_FSB_TO_BB(mp, 1), 0);
- if (!bp) {
+ XFS_FSB_TO_BB(mp, 1), 0, NULL);
+ if (!bp || bp->b_error) {
xfs_warn(mp, "realtime device size check failed");
+ if (bp)
+ xfs_buf_relse(bp);
return EIO;
}
xfs_buf_relse(bp);
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h
index f429d9d5d325..a05b45175fb0 100644
--- a/fs/xfs/xfs_sb.h
+++ b/fs/xfs/xfs_sb.h
@@ -81,6 +81,7 @@ struct xfs_mount;
#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
#define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
+#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
#define XFS_SB_VERSION2_OKREALFBITS \
(XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
@@ -503,6 +504,12 @@ static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
(sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
}
+static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
+{
+ return (xfs_sb_version_hasmorebits(sbp) &&
+ (sbp->sb_features2 & XFS_SB_VERSION2_CRCBIT));
+}
+
/*
* end of superblock version macros
*/
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 26a09bd7f975..ab8839b26272 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -49,7 +49,7 @@
#include "xfs_extfree_item.h"
#include "xfs_mru_cache.h"
#include "xfs_inode_item.h"
-#include "xfs_sync.h"
+#include "xfs_icache.h"
#include "xfs_trace.h"
#include <linux/namei.h>
@@ -863,8 +863,30 @@ xfs_init_mount_workqueues(
WQ_MEM_RECLAIM, 0, mp->m_fsname);
if (!mp->m_cil_workqueue)
goto out_destroy_unwritten;
+
+ mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
+ WQ_NON_REENTRANT, 0, mp->m_fsname);
+ if (!mp->m_reclaim_workqueue)
+ goto out_destroy_cil;
+
+ mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
+ WQ_NON_REENTRANT, 0, mp->m_fsname);
+ if (!mp->m_log_workqueue)
+ goto out_destroy_reclaim;
+
+ mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
+ WQ_NON_REENTRANT, 0, mp->m_fsname);
+ if (!mp->m_eofblocks_workqueue)
+ goto out_destroy_log;
+
return 0;
+out_destroy_log:
+ destroy_workqueue(mp->m_log_workqueue);
+out_destroy_reclaim:
+ destroy_workqueue(mp->m_reclaim_workqueue);
+out_destroy_cil:
+ destroy_workqueue(mp->m_cil_workqueue);
out_destroy_unwritten:
destroy_workqueue(mp->m_unwritten_workqueue);
out_destroy_data_iodone_queue:
@@ -877,11 +899,32 @@ STATIC void
xfs_destroy_mount_workqueues(
struct xfs_mount *mp)
{
+ destroy_workqueue(mp->m_eofblocks_workqueue);
+ destroy_workqueue(mp->m_log_workqueue);
+ destroy_workqueue(mp->m_reclaim_workqueue);
destroy_workqueue(mp->m_cil_workqueue);
destroy_workqueue(mp->m_data_workqueue);
destroy_workqueue(mp->m_unwritten_workqueue);
}
+/*
+ * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
+ * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
+ * for IO to complete so that we effectively throttle multiple callers to the
+ * rate at which IO is completing.
+ */
+void
+xfs_flush_inodes(
+ struct xfs_mount *mp)
+{
+ struct super_block *sb = mp->m_super;
+
+ if (down_read_trylock(&sb->s_umount)) {
+ sync_inodes_sb(sb);
+ up_read(&sb->s_umount);
+ }
+}
+
/* Catch misguided souls that try to use this interface on XFS */
STATIC struct inode *
xfs_fs_alloc_inode(
@@ -1006,9 +1049,8 @@ xfs_fs_put_super(
struct xfs_mount *mp = XFS_M(sb);
xfs_filestream_unmount(mp);
- cancel_delayed_work_sync(&mp->m_sync_work);
xfs_unmountfs(mp);
- xfs_syncd_stop(mp);
+
xfs_freesb(mp);
xfs_icsb_destroy_counters(mp);
xfs_destroy_mount_workqueues(mp);
@@ -1023,7 +1065,6 @@ xfs_fs_sync_fs(
int wait)
{
struct xfs_mount *mp = XFS_M(sb);
- int error;
/*
* Doing anything during the async pass would be counterproductive.
@@ -1031,17 +1072,14 @@ xfs_fs_sync_fs(
if (!wait)
return 0;
- error = xfs_quiesce_data(mp);
- if (error)
- return -error;
-
+ xfs_log_force(mp, XFS_LOG_SYNC);
if (laptop_mode) {
/*
* The disk must be active because we're syncing.
- * We schedule xfssyncd now (now that the disk is
+ * We schedule log work now (now that the disk is
* active) instead of later (when it might not be).
*/
- flush_delayed_work(&mp->m_sync_work);
+ flush_delayed_work(&mp->m_log->l_work);
}
return 0;
@@ -1118,6 +1156,48 @@ xfs_restore_resvblks(struct xfs_mount *mp)
xfs_reserve_blocks(mp, &resblks, NULL);
}
+/*
+ * Trigger writeback of all the dirty metadata in the file system.
+ *
+ * This ensures that the metadata is written to their location on disk rather
+ * than just existing in transactions in the log. This means after a quiesce
+ * there is no log replay required to write the inodes to disk - this is the
+ * primary difference between a sync and a quiesce.
+ *
+ * Note: xfs_log_quiesce() stops background log work - the callers must ensure
+ * it is started again when appropriate.
+ */
+void
+xfs_quiesce_attr(
+ struct xfs_mount *mp)
+{
+ int error = 0;
+
+ /* wait for all modifications to complete */
+ while (atomic_read(&mp->m_active_trans) > 0)
+ delay(100);
+
+ /* force the log to unpin objects from the now complete transactions */
+ xfs_log_force(mp, XFS_LOG_SYNC);
+
+ /* reclaim inodes to do any IO before the freeze completes */
+ xfs_reclaim_inodes(mp, 0);
+ xfs_reclaim_inodes(mp, SYNC_WAIT);
+
+ /* Push the superblock and write an unmount record */
+ error = xfs_log_sbcount(mp);
+ if (error)
+ xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
+ "Frozen image may not be consistent.");
+ /*
+ * Just warn here till VFS can correctly support
+ * read-only remount without racing.
+ */
+ WARN_ON(atomic_read(&mp->m_active_trans) != 0);
+
+ xfs_log_quiesce(mp);
+}
+
STATIC int
xfs_fs_remount(
struct super_block *sb,
@@ -1198,20 +1278,18 @@ xfs_fs_remount(
* value if it is non-zero, otherwise go with the default.
*/
xfs_restore_resvblks(mp);
+ xfs_log_work_queue(mp);
}
/* rw -> ro */
if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
/*
- * After we have synced the data but before we sync the
- * metadata, we need to free up the reserve block pool so that
- * the used block count in the superblock on disk is correct at
- * the end of the remount. Stash the current reserve pool size
- * so that if we get remounted rw, we can return it to the same
- * size.
+ * Before we sync the metadata, we need to free up the reserve
+ * block pool so that the used block count in the superblock on
+ * disk is correct at the end of the remount. Stash the current
+ * reserve pool size so that if we get remounted rw, we can
+ * return it to the same size.
*/
-
- xfs_quiesce_data(mp);
xfs_save_resvblks(mp);
xfs_quiesce_attr(mp);
mp->m_flags |= XFS_MOUNT_RDONLY;
@@ -1243,6 +1321,7 @@ xfs_fs_unfreeze(
struct xfs_mount *mp = XFS_M(sb);
xfs_restore_resvblks(mp);
+ xfs_log_work_queue(mp);
return 0;
}
@@ -1321,6 +1400,8 @@ xfs_fs_fill_super(
spin_lock_init(&mp->m_sb_lock);
mutex_init(&mp->m_growlock);
atomic_set(&mp->m_active_trans, 0);
+ INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
+ INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
mp->m_super = sb;
sb->s_fs_info = mp;
@@ -1371,10 +1452,6 @@ xfs_fs_fill_super(
/*
* we must configure the block size in the superblock before we run the
* full mount process as the mount process can lookup and cache inodes.
- * For the same reason we must also initialise the syncd and register
- * the inode cache shrinker so that inodes can be reclaimed during
- * operations like a quotacheck that iterate all inodes in the
- * filesystem.
*/
sb->s_magic = XFS_SB_MAGIC;
sb->s_blocksize = mp->m_sb.sb_blocksize;
@@ -1384,13 +1461,9 @@ xfs_fs_fill_super(
sb->s_time_gran = 1;
set_posix_acl_flag(sb);
- error = xfs_syncd_init(mp);
- if (error)
- goto out_filestream_unmount;
-
error = xfs_mountfs(mp);
if (error)
- goto out_syncd_stop;
+ goto out_filestream_unmount;
root = igrab(VFS_I(mp->m_rootip));
if (!root) {
@@ -1408,8 +1481,7 @@ xfs_fs_fill_super(
}
return 0;
- out_syncd_stop:
- xfs_syncd_stop(mp);
+
out_filestream_unmount:
xfs_filestream_unmount(mp);
out_free_sb:
@@ -1429,7 +1501,6 @@ out_destroy_workqueues:
out_unmount:
xfs_filestream_unmount(mp);
xfs_unmountfs(mp);
- xfs_syncd_stop(mp);
goto out_free_sb;
}
@@ -1625,16 +1696,6 @@ STATIC int __init
xfs_init_workqueues(void)
{
/*
- * We never want to the same work item to run twice, reclaiming inodes
- * or idling the log is not going to get any faster by multiple CPUs
- * competing for ressources. Use the default large max_active value
- * so that even lots of filesystems can perform these task in parallel.
- */
- xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0);
- if (!xfs_syncd_wq)
- return -ENOMEM;
-
- /*
* The allocation workqueue can be used in memory reclaim situations
* (writepage path), and parallelism is only limited by the number of
* AGs in all the filesystems mounted. Hence use the default large
@@ -1642,20 +1703,15 @@ xfs_init_workqueues(void)
*/
xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0);
if (!xfs_alloc_wq)
- goto out_destroy_syncd;
+ return -ENOMEM;
return 0;
-
-out_destroy_syncd:
- destroy_workqueue(xfs_syncd_wq);
- return -ENOMEM;
}
STATIC void
xfs_destroy_workqueues(void)
{
destroy_workqueue(xfs_alloc_wq);
- destroy_workqueue(xfs_syncd_wq);
}
STATIC int __init
diff --git a/fs/xfs/xfs_super.h b/fs/xfs/xfs_super.h
index 9de4a920ba05..bbe3d15a7904 100644
--- a/fs/xfs/xfs_super.h
+++ b/fs/xfs/xfs_super.h
@@ -74,6 +74,7 @@ struct block_device;
extern __uint64_t xfs_max_file_offset(unsigned int);
+extern void xfs_flush_inodes(struct xfs_mount *mp);
extern void xfs_blkdev_issue_flush(struct xfs_buftarg *);
extern xfs_agnumber_t xfs_set_inode32(struct xfs_mount *);
extern xfs_agnumber_t xfs_set_inode64(struct xfs_mount *);
diff --git a/fs/xfs/xfs_sysctl.c b/fs/xfs/xfs_sysctl.c
index ee2d2adaa438..2801b5ce6cdb 100644
--- a/fs/xfs/xfs_sysctl.c
+++ b/fs/xfs/xfs_sysctl.c
@@ -202,6 +202,15 @@ static ctl_table xfs_table[] = {
.extra1 = &xfs_params.fstrm_timer.min,
.extra2 = &xfs_params.fstrm_timer.max,
},
+ {
+ .procname = "speculative_prealloc_lifetime",
+ .data = &xfs_params.eofb_timer.val,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &xfs_params.eofb_timer.min,
+ .extra2 = &xfs_params.eofb_timer.max,
+ },
/* please keep this the last entry */
#ifdef CONFIG_PROC_FS
{
diff --git a/fs/xfs/xfs_sysctl.h b/fs/xfs/xfs_sysctl.h
index b9937d450f8e..bd8e157c20ef 100644
--- a/fs/xfs/xfs_sysctl.h
+++ b/fs/xfs/xfs_sysctl.h
@@ -47,6 +47,7 @@ typedef struct xfs_param {
xfs_sysctl_val_t rotorstep; /* inode32 AG rotoring control knob */
xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
xfs_sysctl_val_t fstrm_timer; /* Filestream dir-AG assoc'n timeout. */
+ xfs_sysctl_val_t eofb_timer; /* Interval between eofb scan wakeups */
} xfs_param_t;
/*
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 7d36ccf57f93..2e137d4a85ae 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -96,6 +96,8 @@ DEFINE_ATTR_LIST_EVENT(xfs_attr_list_full);
DEFINE_ATTR_LIST_EVENT(xfs_attr_list_add);
DEFINE_ATTR_LIST_EVENT(xfs_attr_list_wrong_blk);
DEFINE_ATTR_LIST_EVENT(xfs_attr_list_notfound);
+DEFINE_ATTR_LIST_EVENT(xfs_attr_leaf_list);
+DEFINE_ATTR_LIST_EVENT(xfs_attr_node_list);
DECLARE_EVENT_CLASS(xfs_perag_class,
TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, int refcount,
@@ -130,6 +132,8 @@ DEFINE_PERAG_REF_EVENT(xfs_perag_get_tag);
DEFINE_PERAG_REF_EVENT(xfs_perag_put);
DEFINE_PERAG_REF_EVENT(xfs_perag_set_reclaim);
DEFINE_PERAG_REF_EVENT(xfs_perag_clear_reclaim);
+DEFINE_PERAG_REF_EVENT(xfs_perag_set_eofblocks);
+DEFINE_PERAG_REF_EVENT(xfs_perag_clear_eofblocks);
TRACE_EVENT(xfs_attr_list_node_descend,
TP_PROTO(struct xfs_attr_list_context *ctx,
@@ -585,6 +589,10 @@ DEFINE_INODE_EVENT(xfs_update_time);
DEFINE_INODE_EVENT(xfs_dquot_dqalloc);
DEFINE_INODE_EVENT(xfs_dquot_dqdetach);
+DEFINE_INODE_EVENT(xfs_inode_set_eofblocks_tag);
+DEFINE_INODE_EVENT(xfs_inode_clear_eofblocks_tag);
+DEFINE_INODE_EVENT(xfs_inode_free_eofblocks_invalid);
+
DECLARE_EVENT_CLASS(xfs_iref_class,
TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip),
TP_ARGS(ip, caller_ip),
@@ -1496,8 +1504,42 @@ DEFINE_DIR2_EVENT(xfs_dir2_node_replace);
DEFINE_DIR2_EVENT(xfs_dir2_node_removename);
DEFINE_DIR2_EVENT(xfs_dir2_node_to_leaf);
+DECLARE_EVENT_CLASS(xfs_attr_class,
+ TP_PROTO(struct xfs_da_args *args),
+ TP_ARGS(args),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(xfs_ino_t, ino)
+ __dynamic_array(char, name, args->namelen)
+ __field(int, namelen)
+ __field(int, valuelen)
+ __field(xfs_dahash_t, hashval)
+ __field(int, op_flags)
+ ),
+ TP_fast_assign(
+ __entry->dev = VFS_I(args->dp)->i_sb->s_dev;
+ __entry->ino = args->dp->i_ino;
+ if (args->namelen)
+ memcpy(__get_str(name), args->name, args->namelen);
+ __entry->namelen = args->namelen;
+ __entry->valuelen = args->valuelen;
+ __entry->hashval = args->hashval;
+ __entry->op_flags = args->op_flags;
+ ),
+ TP_printk("dev %d:%d ino 0x%llx name %.*s namelen %d valuelen %d "
+ "hashval 0x%x op_flags %s",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->ino,
+ __entry->namelen,
+ __entry->namelen ? __get_str(name) : NULL,
+ __entry->namelen,
+ __entry->valuelen,
+ __entry->hashval,
+ __print_flags(__entry->op_flags, "|", XFS_DA_OP_FLAGS))
+)
+
#define DEFINE_ATTR_EVENT(name) \
-DEFINE_EVENT(xfs_da_class, name, \
+DEFINE_EVENT(xfs_attr_class, name, \
TP_PROTO(struct xfs_da_args *args), \
TP_ARGS(args))
DEFINE_ATTR_EVENT(xfs_attr_sf_add);
@@ -1511,10 +1553,14 @@ DEFINE_ATTR_EVENT(xfs_attr_sf_to_leaf);
DEFINE_ATTR_EVENT(xfs_attr_leaf_add);
DEFINE_ATTR_EVENT(xfs_attr_leaf_add_old);
DEFINE_ATTR_EVENT(xfs_attr_leaf_add_new);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_add_work);
DEFINE_ATTR_EVENT(xfs_attr_leaf_addname);
DEFINE_ATTR_EVENT(xfs_attr_leaf_create);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_compact);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_get);
DEFINE_ATTR_EVENT(xfs_attr_leaf_lookup);
DEFINE_ATTR_EVENT(xfs_attr_leaf_replace);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_remove);
DEFINE_ATTR_EVENT(xfs_attr_leaf_removename);
DEFINE_ATTR_EVENT(xfs_attr_leaf_split);
DEFINE_ATTR_EVENT(xfs_attr_leaf_split_before);
@@ -1526,12 +1572,21 @@ DEFINE_ATTR_EVENT(xfs_attr_leaf_to_sf);
DEFINE_ATTR_EVENT(xfs_attr_leaf_to_node);
DEFINE_ATTR_EVENT(xfs_attr_leaf_rebalance);
DEFINE_ATTR_EVENT(xfs_attr_leaf_unbalance);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_toosmall);
DEFINE_ATTR_EVENT(xfs_attr_node_addname);
+DEFINE_ATTR_EVENT(xfs_attr_node_get);
DEFINE_ATTR_EVENT(xfs_attr_node_lookup);
DEFINE_ATTR_EVENT(xfs_attr_node_replace);
DEFINE_ATTR_EVENT(xfs_attr_node_removename);
+DEFINE_ATTR_EVENT(xfs_attr_fillstate);
+DEFINE_ATTR_EVENT(xfs_attr_refillstate);
+
+DEFINE_ATTR_EVENT(xfs_attr_rmtval_get);
+DEFINE_ATTR_EVENT(xfs_attr_rmtval_set);
+DEFINE_ATTR_EVENT(xfs_attr_rmtval_remove);
+
#define DEFINE_DA_EVENT(name) \
DEFINE_EVENT(xfs_da_class, name, \
TP_PROTO(struct xfs_da_args *args), \
@@ -1550,9 +1605,12 @@ DEFINE_DA_EVENT(xfs_da_node_split);
DEFINE_DA_EVENT(xfs_da_node_remove);
DEFINE_DA_EVENT(xfs_da_node_rebalance);
DEFINE_DA_EVENT(xfs_da_node_unbalance);
+DEFINE_DA_EVENT(xfs_da_node_toosmall);
DEFINE_DA_EVENT(xfs_da_swap_lastblock);
DEFINE_DA_EVENT(xfs_da_grow_inode);
DEFINE_DA_EVENT(xfs_da_shrink_inode);
+DEFINE_DA_EVENT(xfs_da_fixhashpath);
+DEFINE_DA_EVENT(xfs_da_path_shift);
DECLARE_EVENT_CLASS(xfs_dir2_space_class,
TP_PROTO(struct xfs_da_args *args, int idx),
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index db056544cbb5..c6c0601abd7a 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -464,10 +464,7 @@ xfs_trans_get_buf(
int numblks,
uint flags)
{
- struct xfs_buf_map map = {
- .bm_bn = blkno,
- .bm_len = numblks,
- };
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
}
@@ -476,7 +473,8 @@ int xfs_trans_read_buf_map(struct xfs_mount *mp,
struct xfs_buftarg *target,
struct xfs_buf_map *map, int nmaps,
xfs_buf_flags_t flags,
- struct xfs_buf **bpp);
+ struct xfs_buf **bpp,
+ const struct xfs_buf_ops *ops);
static inline int
xfs_trans_read_buf(
@@ -486,13 +484,12 @@ xfs_trans_read_buf(
xfs_daddr_t blkno,
int numblks,
xfs_buf_flags_t flags,
- struct xfs_buf **bpp)
+ struct xfs_buf **bpp,
+ const struct xfs_buf_ops *ops)
{
- struct xfs_buf_map map = {
- .bm_bn = blkno,
- .bm_len = numblks,
- };
- return xfs_trans_read_buf_map(mp, tp, target, &map, 1, flags, bpp);
+ DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
+ return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
+ flags, bpp, ops);
}
struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 6311b99c267f..3edf5dbee001 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -93,7 +93,7 @@ _xfs_trans_bjoin(
xfs_buf_item_init(bp, tp->t_mountp);
bip = bp->b_fspriv;
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
- ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL));
+ ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED));
if (reset_recur)
bip->bli_recur = 0;
@@ -257,7 +257,8 @@ xfs_trans_read_buf_map(
struct xfs_buf_map *map,
int nmaps,
xfs_buf_flags_t flags,
- struct xfs_buf **bpp)
+ struct xfs_buf **bpp,
+ const struct xfs_buf_ops *ops)
{
xfs_buf_t *bp;
xfs_buf_log_item_t *bip;
@@ -265,7 +266,7 @@ xfs_trans_read_buf_map(
*bpp = NULL;
if (!tp) {
- bp = xfs_buf_read_map(target, map, nmaps, flags);
+ bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
if (!bp)
return (flags & XBF_TRYLOCK) ?
EAGAIN : XFS_ERROR(ENOMEM);
@@ -312,7 +313,9 @@ xfs_trans_read_buf_map(
if (!(XFS_BUF_ISDONE(bp))) {
trace_xfs_trans_read_buf_io(bp, _RET_IP_);
ASSERT(!XFS_BUF_ISASYNC(bp));
+ ASSERT(bp->b_iodone == NULL);
XFS_BUF_READ(bp);
+ bp->b_ops = ops;
xfsbdstrat(tp->t_mountp, bp);
error = xfs_buf_iowait(bp);
if (error) {
@@ -349,7 +352,7 @@ xfs_trans_read_buf_map(
return 0;
}
- bp = xfs_buf_read_map(target, map, nmaps, flags);
+ bp = xfs_buf_read_map(target, map, nmaps, flags, ops);
if (bp == NULL) {
*bpp = NULL;
return (flags & XBF_TRYLOCK) ?
@@ -429,7 +432,7 @@ xfs_trans_brelse(xfs_trans_t *tp,
bip = bp->b_fspriv;
ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
- ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL));
+ ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
ASSERT(atomic_read(&bip->bli_refcount) > 0);
trace_xfs_trans_brelse(bip);
@@ -516,7 +519,7 @@ xfs_trans_bhold(xfs_trans_t *tp,
ASSERT(bp->b_transp == tp);
ASSERT(bip != NULL);
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
- ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL));
+ ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
ASSERT(atomic_read(&bip->bli_refcount) > 0);
bip->bli_flags |= XFS_BLI_HOLD;
@@ -536,7 +539,7 @@ xfs_trans_bhold_release(xfs_trans_t *tp,
ASSERT(bp->b_transp == tp);
ASSERT(bip != NULL);
ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
- ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL));
+ ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL));
ASSERT(atomic_read(&bip->bli_refcount) > 0);
ASSERT(bip->bli_flags & XFS_BLI_HOLD);
@@ -595,7 +598,7 @@ xfs_trans_log_buf(xfs_trans_t *tp,
bip->bli_flags &= ~XFS_BLI_STALE;
ASSERT(XFS_BUF_ISSTALE(bp));
XFS_BUF_UNSTALE(bp);
- bip->bli_format.blf_flags &= ~XFS_BLF_CANCEL;
+ bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL;
}
tp->t_flags |= XFS_TRANS_DIRTY;
@@ -640,6 +643,7 @@ xfs_trans_binval(
xfs_buf_t *bp)
{
xfs_buf_log_item_t *bip = bp->b_fspriv;
+ int i;
ASSERT(bp->b_transp == tp);
ASSERT(bip != NULL);
@@ -654,8 +658,8 @@ xfs_trans_binval(
*/
ASSERT(XFS_BUF_ISSTALE(bp));
ASSERT(!(bip->bli_flags & (XFS_BLI_LOGGED | XFS_BLI_DIRTY)));
- ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_INODE_BUF));
- ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL);
+ ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF));
+ ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL);
ASSERT(bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY);
ASSERT(tp->t_flags & XFS_TRANS_DIRTY);
return;
@@ -665,10 +669,12 @@ xfs_trans_binval(
bip->bli_flags |= XFS_BLI_STALE;
bip->bli_flags &= ~(XFS_BLI_INODE_BUF | XFS_BLI_LOGGED | XFS_BLI_DIRTY);
- bip->bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;
- bip->bli_format.blf_flags |= XFS_BLF_CANCEL;
- memset((char *)(bip->bli_format.blf_data_map), 0,
- (bip->bli_format.blf_map_size * sizeof(uint)));
+ bip->__bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;
+ bip->__bli_format.blf_flags |= XFS_BLF_CANCEL;
+ for (i = 0; i < bip->bli_format_count; i++) {
+ memset(bip->bli_formats[i].blf_data_map, 0,
+ (bip->bli_formats[i].blf_map_size * sizeof(uint)));
+ }
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
tp->t_flags |= XFS_TRANS_DIRTY;
}
@@ -772,5 +778,5 @@ xfs_trans_dquot_buf(
type == XFS_BLF_GDQUOT_BUF);
ASSERT(atomic_read(&bip->bli_refcount) > 0);
- bip->bli_format.blf_flags |= type;
+ bip->__bli_format.blf_flags |= type;
}
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 2a5c637344b4..d95f565a390e 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -47,6 +47,7 @@
#include "xfs_filestream.h"
#include "xfs_vnodeops.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
/*
* The maximum pathlen is 1024 bytes. Since the minimum file system
@@ -79,7 +80,7 @@ xfs_readlink_bmap(
d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
- bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0);
+ bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, NULL);
if (!bp)
return XFS_ERROR(ENOMEM);
error = bp->b_error;
@@ -150,7 +151,7 @@ xfs_readlink(
* when the link count isn't zero and by xfs_dm_punch_hole() when
* punching a hole to EOF.
*/
-STATIC int
+int
xfs_free_eofblocks(
xfs_mount_t *mp,
xfs_inode_t *ip,
@@ -199,7 +200,7 @@ xfs_free_eofblocks(
if (need_iolock) {
if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
xfs_trans_cancel(tp, 0);
- return 0;
+ return EAGAIN;
}
}
@@ -237,6 +238,8 @@ xfs_free_eofblocks(
} else {
error = xfs_trans_commit(tp,
XFS_TRANS_RELEASE_LOG_RES);
+ if (!error)
+ xfs_inode_clear_eofblocks_tag(ip);
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
@@ -425,19 +428,18 @@ xfs_release(
truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED);
if (truncated) {
xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE);
- if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0)
- xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE);
+ if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) {
+ error = -filemap_flush(VFS_I(ip)->i_mapping);
+ if (error)
+ return error;
+ }
}
}
if (ip->i_d.di_nlink == 0)
return 0;
- if ((S_ISREG(ip->i_d.di_mode) &&
- (VFS_I(ip)->i_size > 0 ||
- (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) &&
- (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
- (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) {
+ if (xfs_can_free_eofblocks(ip, false)) {
/*
* If we can't get the iolock just skip truncating the blocks
@@ -464,7 +466,7 @@ xfs_release(
return 0;
error = xfs_free_eofblocks(mp, ip, true);
- if (error)
+ if (error && error != EAGAIN)
return error;
/* delalloc blocks after truncation means it really is dirty */
@@ -513,13 +515,12 @@ xfs_inactive(
goto out;
if (ip->i_d.di_nlink != 0) {
- if ((S_ISREG(ip->i_d.di_mode) &&
- (VFS_I(ip)->i_size > 0 ||
- (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) &&
- (ip->i_df.if_flags & XFS_IFEXTENTS) &&
- (!(ip->i_d.di_flags &
- (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) ||
- ip->i_delayed_blks != 0))) {
+ /*
+ * force is true because we are evicting an inode from the
+ * cache. Post-eof blocks must be freed, lest we end up with
+ * broken free space accounting.
+ */
+ if (xfs_can_free_eofblocks(ip, true)) {
error = xfs_free_eofblocks(mp, ip, false);
if (error)
return VN_INACTIVE_CACHE;
@@ -777,7 +778,7 @@ xfs_create(
XFS_TRANS_PERM_LOG_RES, log_count);
if (error == ENOSPC) {
/* flush outstanding delalloc blocks and retry */
- xfs_flush_inodes(dp);
+ xfs_flush_inodes(mp);
error = xfs_trans_reserve(tp, resblks, log_res, 0,
XFS_TRANS_PERM_LOG_RES, log_count);
}
@@ -1957,12 +1958,11 @@ xfs_free_file_space(
rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
ioffset = offset & ~(rounding - 1);
-
- if (VN_CACHED(VFS_I(ip)) != 0) {
- error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED);
- if (error)
- goto out_unlock_iolock;
- }
+ error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
+ ioffset, -1);
+ if (error)
+ goto out_unlock_iolock;
+ truncate_pagecache_range(VFS_I(ip), ioffset, -1);
/*
* Need to zero the stuff we're not freeing, on disk.
@@ -2095,6 +2095,73 @@ xfs_free_file_space(
return error;
}
+
+STATIC int
+xfs_zero_file_space(
+ struct xfs_inode *ip,
+ xfs_off_t offset,
+ xfs_off_t len,
+ int attr_flags)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ uint granularity;
+ xfs_off_t start_boundary;
+ xfs_off_t end_boundary;
+ int error;
+
+ granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
+
+ /*
+ * Round the range of extents we are going to convert inwards. If the
+ * offset is aligned, then it doesn't get changed so we zero from the
+ * start of the block offset points to.
+ */
+ start_boundary = round_up(offset, granularity);
+ end_boundary = round_down(offset + len, granularity);
+
+ ASSERT(start_boundary >= offset);
+ ASSERT(end_boundary <= offset + len);
+
+ if (!(attr_flags & XFS_ATTR_NOLOCK))
+ xfs_ilock(ip, XFS_IOLOCK_EXCL);
+
+ if (start_boundary < end_boundary - 1) {
+ /* punch out the page cache over the conversion range */
+ truncate_pagecache_range(VFS_I(ip), start_boundary,
+ end_boundary - 1);
+ /* convert the blocks */
+ error = xfs_alloc_file_space(ip, start_boundary,
+ end_boundary - start_boundary - 1,
+ XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT,
+ attr_flags);
+ if (error)
+ goto out_unlock;
+
+ /* We've handled the interior of the range, now for the edges */
+ if (start_boundary != offset)
+ error = xfs_iozero(ip, offset, start_boundary - offset);
+ if (error)
+ goto out_unlock;
+
+ if (end_boundary != offset + len)
+ error = xfs_iozero(ip, end_boundary,
+ offset + len - end_boundary);
+
+ } else {
+ /*
+ * It's either a sub-granularity range or the range spanned lies
+ * partially across two adjacent blocks.
+ */
+ error = xfs_iozero(ip, offset, len);
+ }
+
+out_unlock:
+ if (!(attr_flags & XFS_ATTR_NOLOCK))
+ xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+ return error;
+
+}
+
/*
* xfs_change_file_space()
* This routine allocates or frees disk space for the given file.
@@ -2120,10 +2187,8 @@ xfs_change_file_space(
xfs_fsize_t fsize;
int setprealloc;
xfs_off_t startoffset;
- xfs_off_t llen;
xfs_trans_t *tp;
struct iattr iattr;
- int prealloc_type;
if (!S_ISREG(ip->i_d.di_mode))
return XFS_ERROR(EINVAL);
@@ -2141,12 +2206,30 @@ xfs_change_file_space(
return XFS_ERROR(EINVAL);
}
- llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len;
+ /*
+ * length of <= 0 for resv/unresv/zero is invalid. length for
+ * alloc/free is ignored completely and we have no idea what userspace
+ * might have set it to, so set it to zero to allow range
+ * checks to pass.
+ */
+ switch (cmd) {
+ case XFS_IOC_ZERO_RANGE:
+ case XFS_IOC_RESVSP:
+ case XFS_IOC_RESVSP64:
+ case XFS_IOC_UNRESVSP:
+ case XFS_IOC_UNRESVSP64:
+ if (bf->l_len <= 0)
+ return XFS_ERROR(EINVAL);
+ break;
+ default:
+ bf->l_len = 0;
+ break;
+ }
if (bf->l_start < 0 ||
bf->l_start > mp->m_super->s_maxbytes ||
- bf->l_start + llen < 0 ||
- bf->l_start + llen > mp->m_super->s_maxbytes)
+ bf->l_start + bf->l_len < 0 ||
+ bf->l_start + bf->l_len >= mp->m_super->s_maxbytes)
return XFS_ERROR(EINVAL);
bf->l_whence = 0;
@@ -2154,29 +2237,20 @@ xfs_change_file_space(
startoffset = bf->l_start;
fsize = XFS_ISIZE(ip);
- /*
- * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
- * file space.
- * These calls do NOT zero the data space allocated to the file,
- * nor do they change the file size.
- *
- * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
- * space.
- * These calls cause the new file data to be zeroed and the file
- * size to be changed.
- */
setprealloc = clrprealloc = 0;
- prealloc_type = XFS_BMAPI_PREALLOC;
-
switch (cmd) {
case XFS_IOC_ZERO_RANGE:
- prealloc_type |= XFS_BMAPI_CONVERT;
- xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0);
- /* FALLTHRU */
+ error = xfs_zero_file_space(ip, startoffset, bf->l_len,
+ attr_flags);
+ if (error)
+ return error;
+ setprealloc = 1;
+ break;
+
case XFS_IOC_RESVSP:
case XFS_IOC_RESVSP64:
error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
- prealloc_type, attr_flags);
+ XFS_BMAPI_PREALLOC, attr_flags);
if (error)
return error;
setprealloc = 1;
diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h
index 447e146b2ba6..5163022d9808 100644
--- a/fs/xfs/xfs_vnodeops.h
+++ b/fs/xfs/xfs_vnodeops.h
@@ -48,14 +48,9 @@ int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
int flags, struct attrlist_cursor_kern *cursor);
-void xfs_tosspages(struct xfs_inode *inode, xfs_off_t first,
- xfs_off_t last, int fiopt);
-int xfs_flushinval_pages(struct xfs_inode *ip, xfs_off_t first,
- xfs_off_t last, int fiopt);
-int xfs_flush_pages(struct xfs_inode *ip, xfs_off_t first,
- xfs_off_t last, uint64_t flags, int fiopt);
-int xfs_wait_on_pages(struct xfs_inode *ip, xfs_off_t first, xfs_off_t last);
+int xfs_iozero(struct xfs_inode *, loff_t, size_t);
int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t);
+int xfs_free_eofblocks(struct xfs_mount *, struct xfs_inode *, bool);
#endif /* _XFS_VNODEOPS_H */