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* udf: fix for pathetic mount times in case of invalid file systemPeter A. Felvegi2013-10-181-9/+36
| | | | | | | | | | | | | | | | | | | | | The UDF driver was not strict enough about checking the IDs in the VSDs when mounting, which resulted in reading through all the sectors of the block device in some unfortunate cases. Eg, trying to mount my uninitialized 200G SSD partition (all 0xFF bytes) took ~350 minutes to fail, because the code expected some of the valid IDs or a zero byte. During this, the mount couldn't be killed, sync from the cmdline blocked, and the machine froze into the shutdown. Valid filesystems (extX, btrfs, ntfs) were rejected by the mere accident of having a zero byte at just the right place in some of their sectors, close enough to the beginning not to generate excess I/O. The fix adds a hard limit on the VSD sector offset, adds the two missing VSD IDs, and stops scanning when encountering an invalid ID. Also replaced the magic number 32768 with a more meaningful #define, and supressed the bogus message about failing to read the first sector if no UDF fs was detected. Signed-off-by: Peter A. Felvegi <petschy@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fortify LVID loadingJan Kara2013-09-243-34/+48
| | | | | | | | | | A user has reported an oops in udf_statfs() that was caused by numOfPartitions entry in LVID structure being corrupted. Fix the problem by verifying whether numOfPartitions makes sense at least to the extent that LVID fits into a single block as it should. Reported-by: Juergen Weigert <jw@suse.com> Signed-off-by: Jan Kara <jack@suse.cz>
* Merge git://git.kvack.org/~bcrl/aio-nextLinus Torvalds2013-09-131-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull aio changes from Ben LaHaise: "First off, sorry for this pull request being late in the merge window. Al had raised a couple of concerns about 2 items in the series below. I addressed the first issue (the race introduced by Gu's use of mm_populate()), but he has not provided any further details on how he wants to rework the anon_inode.c changes (which were sent out months ago but have yet to be commented on). The bulk of the changes have been sitting in the -next tree for a few months, with all the issues raised being addressed" * git://git.kvack.org/~bcrl/aio-next: (22 commits) aio: rcu_read_lock protection for new rcu_dereference calls aio: fix race in ring buffer page lookup introduced by page migration support aio: fix rcu sparse warnings introduced by ioctx table lookup patch aio: remove unnecessary debugging from aio_free_ring() aio: table lookup: verify ctx pointer staging/lustre: kiocb->ki_left is removed aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3" aio: be defensive to ensure request batching is non-zero instead of BUG_ON() aio: convert the ioctx list to table lookup v3 aio: double aio_max_nr in calculations aio: Kill ki_dtor aio: Kill ki_users aio: Kill unneeded kiocb members aio: Kill aio_rw_vect_retry() aio: Don't use ctx->tail unnecessarily aio: io_cancel() no longer returns the io_event aio: percpu ioctx refcount aio: percpu reqs_available aio: reqs_active -> reqs_available aio: fix build when migration is disabled ...
| * aio: Kill aio_rw_vect_retry()Kent Overstreet2013-07-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This code doesn't serve any purpose anymore, since the aio retry infrastructure has been removed. This change should be safe because aio_read/write are also used for synchronous IO, and called from do_sync_read()/do_sync_write() - and there's no looping done in the sync case (the read and write syscalls). Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
* | truncate: drop 'oldsize' truncate_pagecache() parameterKirill A. Shutemov2013-09-121-1/+1
| | | | | | | | | | | | | | | | | | | | truncate_pagecache() doesn't care about old size since commit cedabed49b39 ("vfs: Fix vmtruncate() regression"). Let's drop it. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | udf: Refuse RW mount of the filesystem instead of making it ROJan Kara2013-07-311-18/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refuse RW mount of udf filesystem. So far we just silently changed it to RO mount but when the media is writeable, block layer won't notice this change and thus will think device is used RW and will block eject button of the drive. That is unexpected by users because for non-writeable media eject button works just fine. Userspace mount(8) command handles this just fine and retries mounting with MS_RDONLY set so userspace shouldn't see any regression. Plus any tool mounting udf is likely confronted with the case of read-only media where block layer already refuses to mount the filesystem without MS_RDONLY set so our behavior shouldn't be anything new for it. Reported-by: Hui Wang <hui.wang@canonical.com> Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: Standardize return values in mount sequenceJan Kara2013-07-311-117/+183
|/ | | | | | | | | | | Change all function used in filesystem discovery during mount to user standard kernel return values - -errno on error, 0 on success instead of 1 on failure and 0 on success. This allows us to pass error number (not just failure / success) so we can abort device scanning earlier in case of errors like EIO or ENOMEM . Also we will be able to return EROFS in case writeable mount is requested but writing isn't supported. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: provide ->tmpfile()Al Viro2013-06-291-0/+24
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [readdir] convert udfAl Viro2013-06-291-37/+26
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* aio: don't include aio.h in sched.hKent Overstreet2013-05-071-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Faster kernel compiles by way of fewer unnecessary includes. [akpm@linux-foundation.org: fix fallout] [akpm@linux-foundation.org: fix build] Signed-off-by: Kent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs: Limit sys_mount to only request filesystem modules. (Part 3)Eric W. Biederman2013-03-111-0/+1
| | | | | | | | | Somehow I failed to add the MODULE_ALIAS_FS for cifs, hostfs, hpfs, squashfs, and udf despite what I thought were my careful checks :( Add them now. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-02-263-6/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
| * fs: change return values from -EACCES to -EPERMZhao Hongjiang2013-02-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to SUSv3: [EACCES] Permission denied. An attempt was made to access a file in a way forbidden by its file access permissions. [EPERM] Operation not permitted. An attempt was made to perform an operation limited to processes with appropriate privileges or to the owner of a file or other resource. So -EPERM should be returned if capability checks fails. Strictly speaking this is an API change since the error code user sees is altered. Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com> Acked-by: Jan Kara <jack@suse.cz> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Ian Kent <raven@themaw.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * fs: encode_fh: return FILEID_INVALID if invalid fid_typeNamjae Jeon2013-02-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch is a follow up on below patch: [PATCH] exportfs: add FILEID_INVALID to indicate invalid fid_type commit: 216b6cbdcbd86b1db0754d58886b466ae31f5a63 Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Vivek Trivedi <t.vivek@samsung.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Sage Weil <sage@inktank.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * new helper: file_inode(file)Al Viro2013-02-222-3/+3
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | udf: Remove unused s_extLength from udf_bitmapJan Kara2013-02-052-5/+0
| | | | | | | | | | | | | | s_extLength was assigned to but the value was never really used. So just remove the field. Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: Make s_block_bitmap standard arrayJan Kara2013-02-052-2/+1
| | | | | | | | | | | | | | | | | | | | struct udf_bitmap has array of buffer pointers attached to it. The code unnecessarily used s_block_bitmap as a pointer to the array instead of the standard trick of using 0 length array in the declaration. Change that to make code more readable and actually shrink the structure by one pointer. Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: Fix bitmap overflow on large filesystems with small block sizeJan Kara2013-02-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | For large UDF filesystems with 512-byte blocks the number of necessary bitmap blocks is larger than 2^16 so s_nr_groups in udf_bitmap overflows (the number will overflow for filesystems larger than 128 GB with 512-byte blocks). That results in ENOSPC errors despite the filesystem has plenty of free space. Fix the problem by changing s_nr_groups' type to 'int'. That is enough even for filesystems 2^32 blocks (UDF maximum) and 512-byte blocksize. Reported-and-tested-by: v10lator@myway.de Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: add extent cache support in case of file readingNamjae Jeon2013-01-224-11/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements extent caching in case of file reading. While reading a file, currently, UDF reads metadata serially which takes a lot of time depending on the number of extents present in the file. Caching last accessd extent improves metadata read time. Instead of reading file metadata from start, now we read from the cached extent. This patch considerably improves the time spent by CPU in kernel mode. For example, while reading a 10.9 GB file using dd: Time before applying patch: 11677022208 bytes (10.9GB) copied, 1529.748921 seconds, 7.3MB/s real 25m 29.85s user 0m 12.41s sys 15m 34.75s Time after applying patch: 11677022208 bytes (10.9GB) copied, 1469.338231 seconds, 7.6MB/s real 24m 29.44s user 0m 15.73s sys 3m 27.61s [JK: Fix bh refcounting issues, simplify initialization] Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Bonggil Bak <bgbak@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: Write LVID to disk after opening / closingJan Kara2013-01-211-0/+4
|/ | | | | | | | | | So far we just marked the buffer as dirty and left writing on flusher thread but especially on opening that opens possible race window where we could write other modified fs structures to disk before we mark filesystem as open. So sync LVID buffer to disk after opening and closing fs. Reported-by: Steve Nickel <snickel58@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* UDF: Fix a null pointer dereference in udf_sb_free_partitionsNamjae Jeon2013-01-141-1/+2
| | | | | | | | | | | | This patch fixes a regression caused by commit bff943af6fe "udf: Fix memory leak when mounting" due to which it was triggering a kernel null point dereference in case of interrupted mount OR when allocating memory to sbi->s_partmaps failed in function udf_sb_alloc_partition_maps. Reported-and-tested-by: James Hogan <james@albanarts.com> Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: remove un-needed variable from inode_getblkNamjae Jeon2012-12-131-3/+0
| | | | | | | | The variable last_block is not needed. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: don't increment lenExtents while writing to a holeNamjae Jeon2012-12-131-2/+5
| | | | | | | | | | | Incrementing lenExtents even while writing to a hole is bad for performance as calls to udf_discard_prealloc and udf_truncate_tail_extent would not return from start if isize != lenExtents Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: fix memory leak while allocating blocks during writeNamjae Jeon2012-12-131-0/+4
| | | | | | | | Need to brelse the buffer_head stored in cur_epos and next_epos. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
* Merge branch 'for_linus' of ↵Linus Torvalds2012-10-042-16/+52
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull ext3 & udf fixes from Jan Kara: "Shortlog pretty much says it all. The interesting bits are UDF support for direct IO and ext3 fix for a long standing oops in data=journal mode." * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: jbd: Fix assertion failure in commit code due to lacking transaction credits UDF: Add support for O_DIRECT ext3: Replace 0 with NULL for pointer in super.c file udf: add writepages support for udf ext3: don't clear orphan list on ro mount with errors reiserfs: Make reiserfs_xattr_handlers static
| * UDF: Add support for O_DIRECTIan Abbott2012-09-062-16/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for the O_DIRECT flag. There are two cases to deal with: 1. Small files stored in the ICB (inode control block?): just return 0 from the new udf_adinicb_direct_IO() handler to fall back to buffered I/O. 2. Larger files, not stored in the ICB: nothing special here. Just call blockdev_direct_IO() from our new udf_direct_IO() handler and tidy up any blocks instantiated outside i_size on error. This is pretty standard. Factor error handling code out of udf_write_begin() into new function udf_write_failed() so it can also be called by udf_direct_IO(). Also change the whitespace in udf_aops to make it a bit neater. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Jan Kara <jack@suse.cz>
| * Merge branch 'fast_track' into for_nextJan Kara2012-09-051-6/+29
| |\
| * | udf: add writepages support for udfNamjae Jeon2012-09-041-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use mpage_writepages() instead of multiple calls to udf_writepage() to make performance higher. *Write Speed with writepage() = RecSize ReadSpeed WriteSpeed RanReadSpeed RanWriteSpeed 10485760 0.00MB/sec 8.56MB/sec 0.00MB/sec 8.20MB/sec 1048576 0.00MB/sec 8.57MB/sec 0.00MB/sec 6.42MB/sec 524288 0.00MB/sec 8.59MB/sec 0.00MB/sec 5.24MB/sec 262144 0.00MB/sec 8.59MB/sec 0.00MB/sec 4.17MB/sec 131072 0.00MB/sec 8.53MB/sec 0.00MB/sec 3.32MB/sec 65536 0.00MB/sec 8.49MB/sec 0.00MB/sec 2.31MB/sec *Write Speed with writepages() RecSize ReadSpeed WriteSpeed RanReadSpeed RanWriteSpeed 10485760 0.00MB/sec 9.88MB/sec 0.00MB/sec 9.60MB/sec 1048576 0.00MB/sec 9.95MB/sec 0.00MB/sec 7.52MB/sec 524288 0.00MB/sec 9.98MB/sec 0.00MB/sec 6.16MB/sec 262144 0.00MB/sec 9.90MB/sec 0.00MB/sec 4.98MB/sec 131072 0.00MB/sec 9.89MB/sec 0.00MB/sec 3.78MB/sec 65536 0.00MB/sec 9.81MB/sec 0.00MB/sec 2.50MB/sec There is about 1.4MB/sec speed improvement over 8.5MB/sec, which comes out around 16% improvement. Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Ashish Sangwan <ashish.sangwan2@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2012-10-021-0/+5
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs update from Al Viro: - big one - consolidation of descriptor-related logics; almost all of that is moved to fs/file.c (BTW, I'm seriously tempted to rename the result to fd.c. As it is, we have a situation when file_table.c is about handling of struct file and file.c is about handling of descriptor tables; the reasons are historical - file_table.c used to be about a static array of struct file we used to have way back). A lot of stray ends got cleaned up and converted to saner primitives, disgusting mess in android/binder.c is still disgusting, but at least doesn't poke so much in descriptor table guts anymore. A bunch of relatively minor races got fixed in process, plus an ext4 struct file leak. - related thing - fget_light() partially unuglified; see fdget() in there (and yes, it generates the code as good as we used to have). - also related - bits of Cyrill's procfs stuff that got entangled into that work; _not_ all of it, just the initial move to fs/proc/fd.c and switch of fdinfo to seq_file. - Alex's fs/coredump.c spiltoff - the same story, had been easier to take that commit than mess with conflicts. The rest is a separate pile, this was just a mechanical code movement. - a few misc patches all over the place. Not all for this cycle, there'll be more (and quite a few currently sit in akpm's tree)." Fix up trivial conflicts in the android binder driver, and some fairly simple conflicts due to two different changes to the sock_alloc_file() interface ("take descriptor handling from sock_alloc_file() to callers" vs "net: Providing protocol type via system.sockprotoname xattr of /proc/PID/fd entries" adding a dentry name to the socket) * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits) MAX_LFS_FILESIZE should be a loff_t compat: fs: Generic compat_sys_sendfile implementation fs: push rcu_barrier() from deactivate_locked_super() to filesystems btrfs: reada_extent doesn't need kref for refcount coredump: move core dump functionality into its own file coredump: prevent double-free on an error path in core dumper usb/gadget: fix misannotations fcntl: fix misannotations ceph: don't abuse d_delete() on failure exits hypfs: ->d_parent is never NULL or negative vfs: delete surplus inode NULL check switch simple cases of fget_light to fdget new helpers: fdget()/fdput() switch o2hb_region_dev_write() to fget_light() proc_map_files_readdir(): don't bother with grabbing files make get_file() return its argument vhost_set_vring(): turn pollstart/pollstop into bool switch prctl_set_mm_exe_file() to fget_light() switch xfs_find_handle() to fget_light() switch xfs_swapext() to fget_light() ...
| * | | fs: push rcu_barrier() from deactivate_locked_super() to filesystemsKirill A. Shutemov2012-10-021-0/+5
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's no reason to call rcu_barrier() on every deactivate_locked_super(). We only need to make sure that all delayed rcu free inodes are flushed before we destroy related cache. Removing rcu_barrier() from deactivate_locked_super() affects some fast paths. E.g. on my machine exit_group() of a last process in IPC namespace takes 0.07538s. rcu_barrier() takes 0.05188s of that time. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2012-10-023-16/+20
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace Pull user namespace changes from Eric Biederman: "This is a mostly modest set of changes to enable basic user namespace support. This allows the code to code to compile with user namespaces enabled and removes the assumption there is only the initial user namespace. Everything is converted except for the most complex of the filesystems: autofs4, 9p, afs, ceph, cifs, coda, fuse, gfs2, ncpfs, nfs, ocfs2 and xfs as those patches need a bit more review. The strategy is to push kuid_t and kgid_t values are far down into subsystems and filesystems as reasonable. Leaving the make_kuid and from_kuid operations to happen at the edge of userspace, as the values come off the disk, and as the values come in from the network. Letting compile type incompatible compile errors (present when user namespaces are enabled) guide me to find the issues. The most tricky areas have been the places where we had an implicit union of uid and gid values and were storing them in an unsigned int. Those places were converted into explicit unions. I made certain to handle those places with simple trivial patches. Out of that work I discovered we have generic interfaces for storing quota by projid. I had never heard of the project identifiers before. Adding full user namespace support for project identifiers accounts for most of the code size growth in my git tree. Ultimately there will be work to relax privlige checks from "capable(FOO)" to "ns_capable(user_ns, FOO)" where it is safe allowing root in a user names to do those things that today we only forbid to non-root users because it will confuse suid root applications. While I was pushing kuid_t and kgid_t changes deep into the audit code I made a few other cleanups. I capitalized on the fact we process netlink messages in the context of the message sender. I removed usage of NETLINK_CRED, and started directly using current->tty. Some of these patches have also made it into maintainer trees, with no problems from identical code from different trees showing up in linux-next. After reading through all of this code I feel like I might be able to win a game of kernel trivial pursuit." Fix up some fairly trivial conflicts in netfilter uid/git logging code. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (107 commits) userns: Convert the ufs filesystem to use kuid/kgid where appropriate userns: Convert the udf filesystem to use kuid/kgid where appropriate userns: Convert ubifs to use kuid/kgid userns: Convert squashfs to use kuid/kgid where appropriate userns: Convert reiserfs to use kuid and kgid where appropriate userns: Convert jfs to use kuid/kgid where appropriate userns: Convert jffs2 to use kuid and kgid where appropriate userns: Convert hpfs to use kuid and kgid where appropriate userns: Convert btrfs to use kuid/kgid where appropriate userns: Convert bfs to use kuid/kgid where appropriate userns: Convert affs to use kuid/kgid wherwe appropriate userns: On alpha modify linux_to_osf_stat to use convert from kuids and kgids userns: On ia64 deal with current_uid and current_gid being kuid and kgid userns: On ppc convert current_uid from a kuid before printing. userns: Convert s390 getting uid and gid system calls to use kuid and kgid userns: Convert s390 hypfs to use kuid and kgid where appropriate userns: Convert binder ipc to use kuids userns: Teach security_path_chown to take kuids and kgids userns: Add user namespace support to IMA userns: Convert EVM to deal with kuids and kgids in it's hmac computation ...
| * | userns: Convert the udf filesystem to use kuid/kgid where appropriateEric W. Biederman2012-09-213-16/+20
| | | | | | | | | | | | | | | Cc: Jan Kara <jack@suse.cz> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
* | | udf: Fix data corruption for files in ICBJan Kara2012-09-051-6/+29
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a file is stored in ICB (inode), we overwrite part of the file, and the page containing file's data is not in page cache, we end up corrupting file's data by overwriting them with zeros. The problem is we use simple_write_begin() which simply zeroes parts of the page which are not written to. The problem has been introduced by be021ee4 (udf: convert to new aops). Fix the problem by providing a ->write_begin function which makes the page properly uptodate. CC: <stable@vger.kernel.org> # >= 2.6.24 Reported-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: fix retun value on error path in udf_load_logicalvolNikola Pajkovsky2012-08-151-1/+4
| | | | | | | | | | | | | | | | In case we detect a problem and bail out, we fail to set "ret" to a nonzero value, and udf_load_logicalvol will mistakenly report success. Signed-off-by: Nikola Pajkovsky <npajkovs@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>
* | UDF: During mount free lvid_bh before rescanning with different blocksizeAshish Sangwan2012-08-151-0/+2
| | | | | | | | | | | | | | | | | | | | If s_lvid_bh is not freed and set to NULL before re-scanning partition with default block size, we might end up using wrong lvid in case s_lvid_bh is not updated in udf_load_logicalvolint during rescan. Signed-off-by: Ashish Sangwan <ashish.sangwan2@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* | udf: fix udf_setsize() for file data in ICBIan Abbott2012-08-151-1/+4
|/ | | | | | | | | | If the new size is larger than the old size and the old file data was stored in the ICB (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) and the new size still fits in the ICB, skip the call to udf_extend_file() as it does not handle this i_alloc_type value (it calls BUG()). Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Jan Kara <jack@suse.cz>
* Merge branch 'for_linus' of ↵Linus Torvalds2012-07-245-72/+68
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull misc udf, ext2, ext3, and isofs fixes from Jan Kara: "Assorted, mostly trivial, fixes for udf, ext2, ext3, and isofs. I'm on vacation and scarcely checking email since we are expecting baby any day now but these fixes should be safe to go in and I don't want to delay them unnecessarily." * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: avoid info leak on export isofs: avoid info leak on export udf: Improve table length check to avoid possible overflow ext3: Check return value of blkdev_issue_flush() jbd: Check return value of blkdev_issue_flush() udf: Do not decrement i_blocks when freeing indirect extent block udf: Fix memory leak when mounting ext2: cleanup the confused goto label UDF: Remove unnecessary variable "offset" from udf_fill_inode udf: stop using s_dirt ext3: force ro mount if ext3_setup_super() fails quota: fix checkpatch.pl warning by replacing <asm/uaccess.h> with <linux/uaccess.h>
| * udf: avoid info leak on exportMathias Krause2012-07-131-0/+1
| | | | | | | | | | | | | | | | For type 0x51 the udf.parent_partref member in struct fid gets copied uninitialized to userland. Fix this by initializing it to 0. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: Improve table length check to avoid possible overflowJan Kara2012-07-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | When a partition table length is corrupted to be close to 1 << 32, the check for its length may overflow on 32-bit systems and we will think the length is valid. Later on the kernel can crash trying to read beyond end of buffer. Fix the check to avoid possible overflow. CC: stable@vger.kernel.org Reported-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: Do not decrement i_blocks when freeing indirect extent blockJan Kara2012-07-091-2/+2
| | | | | | | | | | | | | | | | | | Indirect extent block is not accounted in i_blocks during allocation thus we should not decrement i_blocks when we are freeing such block during truncation. Reported-by: Steve Nickel <snickel58@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: Fix memory leak when mountingJan Kara2012-07-091-58/+64
| | | | | | | | | | | | | | | | | | When we are mounting filesystem, we can load one partition table before finding out that we cannot complete processing of logical volume descriptor and trying the reserve descriptor. Free the table properly before trying the reserve descriptor. Signed-off-by: Jan Kara <jack@suse.cz>
| * UDF: Remove unnecessary variable "offset" from udf_fill_inodeAshish Sangwan2012-07-091-4/+0
| | | | | | | | | | | | | | | | The variable "offset" is not needed. Remove it. Signed-off-by: Ashish Sangwan <ashish.sangwan2@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: stop using s_dirtArtem Bityutskiy2012-07-092-7/+0
| | | | | | | | | | | | | | | | | | | | The UDF file-system does not need the 's_dirt' superblock flag because it does not define the 'write_super()' method. This flag was set to 1 in few places and set to 0 in '->sync_fs()' and was basically useless. Stop using it because it is on its way out. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz>
* | don't pass nameidata to ->create()Al Viro2012-07-141-1/+1
| | | | | | | | | | | | | | | | boolean "does it have to be exclusive?" flag is passed instead; Local filesystem should just ignore it - the object is guaranteed not to be there yet. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | stop passing nameidata to ->lookup()Al Viro2012-07-141-1/+1
|/ | | | | | | | | Just the flags; only NFS cares even about that, but there are legitimate uses for such argument. And getting rid of that completely would require splitting ->lookup() into a couple of methods (at least), so let's leave that alone for now... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for_linus' of ↵Linus Torvalds2012-06-281-38/+64
|\ | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull UDF fixes from Jan Kara: "Make UDF more robust in presence of corrupted filesystem" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: Fortify loading of sparing table udf: Avoid run away loop when partition table length is corrupted udf: Use 'ret' instead of abusing 'i' in udf_load_logicalvol()
| * udf: Fortify loading of sparing tableJan Kara2012-06-281-33/+53
| | | | | | | | | | | | | | Add sanity checks when loading sparing table from disk to avoid accessing unallocated memory or writing to it. Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: Avoid run away loop when partition table length is corruptedJan Kara2012-06-281-1/+9
| | | | | | | | | | | | | | Check provided length of partition table so that (possibly maliciously) corrupted partition table cannot cause accessing data beyond current buffer. Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: Use 'ret' instead of abusing 'i' in udf_load_logicalvol()Jan Kara2012-06-281-4/+2
| | | | | | | | Signed-off-by: Jan Kara <jack@suse.cz>
* | ->encode_fh() API changeAl Viro2012-05-291-9/+5
|/ | | | | | | | | pass inode + parent's inode or NULL instead of dentry + bool saying whether we want the parent or not. NOTE: that needs ceph fix folded in. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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