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* ext4: atomically set inode->i_flags in ext4_set_inode_flags()Theodore Ts'o2014-03-301-6/+9
| | | | | | | | | | | | | Use cmpxchg() to atomically set i_flags instead of clearing out the S_IMMUTABLE, S_APPEND, etc. flags and then setting them from the EXT4_IMMUTABLE_FL, EXT4_APPEND_FL flags, since this opens up a race where an immutable file has the immutable flag cleared for a brief window of time. Reported-by: John Sullivan <jsrhbz@kanargh.force9.co.uk> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ext4: don't leave i_crtime.tv_sec uninitializedTheodore Ts'o2014-02-161-0/+2
| | | | | | | | | | | If the i_crtime field is not present in the inode, don't leave the field uninitialized. Fixes: ef7f38359 ("ext4: Add nanosecond timestamps") Reported-by: Vegard Nossum <vegard.nossum@oracle.com> Tested-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: fix online resize with a non-standard blocks per group settingTheodore Ts'o2014-02-151-1/+1
| | | | | | | | | | | | | | | The set_flexbg_block_bitmap() function assumed that the number of blocks in a blockgroup was sb->blocksize * 8, which is normally true, but not always! Use EXT4_BLOCKS_PER_GROUP(sb) instead, to fix block bitmap corruption after: mke2fs -t ext4 -g 3072 -i 4096 /dev/vdd 1G mount -t ext4 /dev/vdd /vdd resize2fs /dev/vdd 8G Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reported-by: Jon Bernard <jbernard@tuxion.com> Cc: stable@vger.kernel.org
* ext4: fix online resize with very large inode tablesTheodore Ts'o2014-02-151-12/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a file system has a large number of inodes per block group, all of the metadata blocks in a flex_bg may be larger than what can fit in a single block group. Unfortunately, ext4_alloc_group_tables() in resize.c was never tested to see if it would handle this case correctly, and there were a large number of bugs which caused the following sequence to result in a BUG_ON: kernel bug at fs/ext4/resize.c:409! ... call trace: [<ffffffff81256768>] ext4_flex_group_add+0x1448/0x1830 [<ffffffff81257de2>] ext4_resize_fs+0x7b2/0xe80 [<ffffffff8123ac50>] ext4_ioctl+0xbf0/0xf00 [<ffffffff811c111d>] do_vfs_ioctl+0x2dd/0x4b0 [<ffffffff811b9df2>] ? final_putname+0x22/0x50 [<ffffffff811c1371>] sys_ioctl+0x81/0xa0 [<ffffffff81676aa9>] system_call_fastpath+0x16/0x1b code: c8 4c 89 df e8 41 96 f8 ff 44 89 e8 49 01 c4 44 29 6d d4 0 rip [<ffffffff81254fa1>] set_flexbg_block_bitmap+0x171/0x180 This can be reproduced with the following command sequence: mke2fs -t ext4 -i 4096 /dev/vdd 1G mount -t ext4 /dev/vdd /vdd resize2fs /dev/vdd 8G To fix this, we need to make sure the right thing happens when a block group's inode table straddles two block groups, which means the following bugs had to be fixed: 1) Not clearing the BLOCK_UNINIT flag in the second block group in ext4_alloc_group_tables --- the was proximate cause of the BUG_ON. 2) Incorrectly determining how many block groups contained contiguous free blocks in ext4_alloc_group_tables(). 3) Incorrectly setting the start of the next block range to be marked in use after a discontinuity in setup_new_flex_group_blocks(). Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: don't try to modify s_flags if the the file system is read-onlyTheodore Ts'o2014-02-121-7/+13
| | | | | | | | | | | | If an ext4 file system is created by some tool other than mke2fs (perhaps by someone who has a pathalogical fear of the GPL) that doesn't set one or the other of the EXT2_FLAGS_{UN}SIGNED_HASH flags, and that file system is then mounted read-only, don't try to modify the s_flags field. Otherwise, if dm_verity is in use, the superblock will change, causing an dm_verity failure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: fix error paths in swap_inode_boot_loader() Zheng Liu2014-02-121-1/+2
| | | | | | | | | | | | | In swap_inode_boot_loader() we forgot to release ->i_mutex and resume unlocked dio for inode and inode_bl if there is an error starting the journal handle. This commit fixes this issue. Reported-by: Ahmed Tamrawi <ahmedtamrawi@gmail.com> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Dr. Tilmann Bubeck <t.bubeck@reinform.de> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org # v3.10+
* ext4: fix xfstest generic/299 block validity failuresEric Whitney2014-02-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a115f749c1 (ext4: remove wait for unwritten extent conversion from ext4_truncate) exposed a bug in ext4_ext_handle_uninitialized_extents(). It can be triggered by xfstest generic/299 when run on a test file system created without a journal. This test continuously fallocates and truncates files to which random dio/aio writes are simultaneously performed by a separate process. The test completes successfully, but if the test filesystem is mounted with the block_validity option, a warning message stating that a logical block has been mapped to an illegal physical block is posted in the kernel log. The bug occurs when an extent is being converted to the written state by ext4_end_io_dio() and ext4_ext_handle_uninitialized_extents() discovers a mapping for an existing uninitialized extent. Although it sets EXT4_MAP_MAPPED in map->m_flags, it fails to set map->m_pblk to the discovered physical block number. Because map->m_pblk is not otherwise initialized or set by this function or its callers, its uninitialized value is returned to ext4_map_blocks(), where it is stored as a bogus mapping in the extent status tree. Since map->m_pblk can accidentally contain illegal values that are larger than the physical size of the file system, calls to check_block_validity() in ext4_map_blocks() that are enabled if the block_validity mount option is used can fail, resulting in the logged warning message. Signed-off-by: Eric Whitney <enwlinux@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org # 3.11+
* fix O_SYNC|O_APPEND syncing the wrong range on write()Al Viro2014-02-091-1/+1
| | | | | | | | | | | | | | | | | | | | | It actually goes back to 2004 ([PATCH] Concurrent O_SYNC write support) when sync_page_range() had been introduced; generic_file_write{,v}() correctly synced pos_after_write - written .. pos_after_write - 1 but generic_file_aio_write() synced pos_before_write .. pos_before_write + written - 1 instead. Which is not the same thing with O_APPEND, obviously. A couple of years later correct variant had been killed off when everything switched to use of generic_file_aio_write(). All users of generic_file_aio_write() are affected, and the same bug has been copied into other instances of ->aio_write(). The fix is trivial; the only subtle point is that generic_write_sync() ought to be inlined to avoid calculations useless for the majority of calls. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-blockLinus Torvalds2014-01-301-4/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull core block IO changes from Jens Axboe: "The major piece in here is the immutable bio_ve series from Kent, the rest is fairly minor. It was supposed to go in last round, but various issues pushed it to this release instead. The pull request contains: - Various smaller blk-mq fixes from different folks. Nothing major here, just minor fixes and cleanups. - Fix for a memory leak in the error path in the block ioctl code from Christian Engelmayer. - Header export fix from CaiZhiyong. - Finally the immutable biovec changes from Kent Overstreet. This enables some nice future work on making arbitrarily sized bios possible, and splitting more efficient. Related fixes to immutable bio_vecs: - dm-cache immutable fixup from Mike Snitzer. - btrfs immutable fixup from Muthu Kumar. - bio-integrity fix from Nic Bellinger, which is also going to stable" * 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits) xtensa: fixup simdisk driver to work with immutable bio_vecs block/blk-mq-cpu.c: use hotcpu_notifier() blk-mq: for_each_* macro correctness block: Fix memory leak in rw_copy_check_uvector() handling bio-integrity: Fix bio_integrity_verify segment start bug block: remove unrelated header files and export symbol blk-mq: uses page->list incorrectly blk-mq: use __smp_call_function_single directly btrfs: fix missing increment of bi_remaining Revert "block: Warn and free bio if bi_end_io is not set" block: Warn and free bio if bi_end_io is not set blk-mq: fix initializing request's start time block: blk-mq: don't export blk_mq_free_queue() block: blk-mq: make blk_sync_queue support mq block: blk-mq: support draining mq queue dm cache: increment bi_remaining when bi_end_io is restored block: fixup for generic bio chaining block: Really silence spurious compiler warnings block: Silence spurious compiler warnings block: Kill bio_pair_split() ...
| * Merge tag 'v3.13-rc6' into for-3.14/coreJens Axboe2013-12-316-39/+75
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Needed to bring blk-mq uptodate, since changes have been going in since for-3.14/core was established. Fixup merge issues related to the immutable biovec changes. Signed-off-by: Jens Axboe <axboe@kernel.dk> Conflicts: block/blk-flush.c fs/btrfs/check-integrity.c fs/btrfs/extent_io.c fs/btrfs/scrub.c fs/logfs/dev_bdev.c
| * | block: Abstract out bvec iteratorKent Overstreet2013-11-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Immutable biovecs are going to require an explicit iterator. To implement immutable bvecs, a later patch is going to add a bi_bvec_done member to this struct; for now, this patch effectively just renames things. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Ed L. Cashin" <ecashin@coraid.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Yehuda Sadeh <yehuda@inktank.com> Cc: Sage Weil <sage@inktank.com> Cc: Alex Elder <elder@inktank.com> Cc: ceph-devel@vger.kernel.org Cc: Joshua Morris <josh.h.morris@us.ibm.com> Cc: Philip Kelleher <pjk1939@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Neil Brown <neilb@suse.de> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: dm-devel@redhat.com Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: Boaz Harrosh <bharrosh@panasas.com> Cc: Benny Halevy <bhalevy@tonian.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <chris.mason@fusionio.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Dave Kleikamp <shaggy@kernel.org> Cc: Joern Engel <joern@logfs.org> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Ben Myers <bpm@sgi.com> Cc: xfs@oss.sgi.com Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Guo Chao <yan@linux.vnet.ibm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: "Roger Pau Monné" <roger.pau@citrix.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Ian Campbell <Ian.Campbell@citrix.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Jerome Marchand <jmarchand@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Peng Tao <tao.peng@emc.com> Cc: Andy Adamson <andros@netapp.com> Cc: fanchaoting <fanchaoting@cn.fujitsu.com> Cc: Jie Liu <jeff.liu@oracle.com> Cc: Sunil Mushran <sunil.mushran@gmail.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Pankaj Kumar <pankaj.km@samsung.com> Cc: Dan Magenheimer <dan.magenheimer@oracle.com> Cc: Mel Gorman <mgorman@suse.de>6
| * | block: Convert various code to bio_for_each_segment()Kent Overstreet2013-11-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With immutable biovecs we don't want code accessing bi_io_vec directly - the uses this patch changes weren't incorrect since they all own the bio, but it makes the code harder to audit for no good reason - also, this will help with multipage bvecs later. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com> Cc: Joern Engel <joern@logfs.org> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
* | | Merge tag 'ext4_for_linus' of ↵Linus Torvalds2014-01-285-28/+22
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 update from Ted Ts'o: "Bug fixes and cleanups for ext4. We also enable the punch hole functionality for bigalloc file systems" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: delete "set but not used" variables ext4: don't pass freed handle to ext4_walk_page_buffers ext4: avoid clearing beyond i_blocks when truncating an inline data file ext4: ext4_inode_is_fast_symlink should use EXT4_CLUSTER_SIZE ext4: fix a typo in extents.c ext4: use %pd printk specificer ext4: standardize error handling in ext4_da_write_inline_data_begin() ext4: retry allocation when inline->extent conversion failed ext4: enable punch hole for bigalloc
| * | | ext4: delete "set but not used" variablesjon ernst2014-01-112-7/+1
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Jon Ernst <jonernst07@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
| * | | ext4: don't pass freed handle to ext4_walk_page_buffersTheodore Ts'o2014-01-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is harmless, since ext4_walk_page_buffers only passes the handle onto the callback function, and in this call site the function in question, bput_one(), doesn't actually use the handle. But there's no point passing in an invalid handle, and it creates a Coverity warning, so let's just clean it up. Addresses-Coverity-Id: #1091168 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * | | ext4: avoid clearing beyond i_blocks when truncating an inline data fileTheodore Ts'o2014-01-071-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A missing cast means that when we are truncating a file which is less than 60 bytes, we don't clear the correct area of memory, and in fact we can end up truncating the next inode in the inode table, or worse yet, some other kernel data structure. Addresses-Coverity-Id: #751987 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
| * | | ext4: ext4_inode_is_fast_symlink should use EXT4_CLUSTER_SIZEYongqiang Yang2014-01-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Can be reproduced by xfstests 62 with bigalloc and 128bit size inode. Signed-off-by: Yongqiang Yang <yangyongqiang01@baidu.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
| * | | ext4: fix a typo in extents.cYongqiang Yang2014-01-061-1/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Yongqiang Yang <yangyongqiang01@baidu.com> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
| * | | ext4: use %pd printk specificerDavid Howells2014-01-061-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new %pd printk() specifier in Ext4 to replace passing of dentry name or dentry name and name length * 2 with just passing the dentry. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> cc: Andreas Dilger <adilger.kernel@dilger.ca> cc: linux-ext4@vger.kernel.org
| * | | ext4: standardize error handling in ext4_da_write_inline_data_begin()Jan Kara2014-01-061-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function has a bit non-standard (for ext4) error recovery in that it used a mix of 'out' labels and testing for 'handle' being NULL. There isn't a good reason for that in the function so clean it up a bit. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * | | ext4: retry allocation when inline->extent conversion failedJan Kara2014-01-061-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Similarly as other ->write_begin functions in ext4, also ext4_da_write_inline_data_begin() should retry allocation if the conversion failed because of ENOSPC. This avoids returning ENOSPC prematurely because of uncommitted block deletions. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * | | ext4: enable punch hole for bigallocZheng Liu2014-01-061-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After applied this commit (d23142c6), ext4 has supported punch hole for a file system with bigalloc feature. But we forgot to enable it. This commit fixes it. Cc: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* | | | Merge branch 'for-linus' of ↵Linus Torvalds2014-01-287-209/+38
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "Assorted stuff; the biggest pile here is Christoph's ACL series. Plus assorted cleanups and fixes all over the place... There will be another pile later this week" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (43 commits) __dentry_path() fixes vfs: Remove second variable named error in __dentry_path vfs: Is mounted should be testing mnt_ns for NULL or error. Fix race when checking i_size on direct i/o read hfsplus: remove can_set_xattr nfsd: use get_acl and ->set_acl fs: remove generic_acl nfs: use generic posix ACL infrastructure for v3 Posix ACLs gfs2: use generic posix ACL infrastructure jfs: use generic posix ACL infrastructure xfs: use generic posix ACL infrastructure reiserfs: use generic posix ACL infrastructure ocfs2: use generic posix ACL infrastructure jffs2: use generic posix ACL infrastructure hfsplus: use generic posix ACL infrastructure f2fs: use generic posix ACL infrastructure ext2/3/4: use generic posix ACL infrastructure btrfs: use generic posix ACL infrastructure fs: make posix_acl_create more useful fs: make posix_acl_chmod more useful ...
| * | | | ext2/3/4: use generic posix ACL infrastructureChristoph Hellwig2014-01-257-209/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | fs: make posix_acl_create more usefulChristoph Hellwig2014-01-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename the current posix_acl_created to __posix_acl_create and add a fully featured helper to set up the ACLs on file creation that uses get_acl(). Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | fs: make posix_acl_chmod more usefulChristoph Hellwig2014-01-251-1/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename the current posix_acl_chmod to __posix_acl_chmod and add a fully featured ACL chmod helper that uses the ->set_acl inode operation. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | | fs/ext4: use rbtree postorder iteration helper instead of opencodingCody P Schafer2014-01-232-59/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead of opencoding an alternate postorder iteration that modifies the tree Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Michel Lespinasse <walken@google.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge tag 'xfs-for-linus-v3.14-rc1' of git://oss.sgi.com/xfs/xfsLinus Torvalds2014-01-231-0/+4
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull xfs update from Ben Myers: "This is primarily bug fixes, many of which you already have. New stuff includes a series to decouple the in-memory and on-disk log format, helpers in the area of inode clusters, and i_version handling. We decided to try to use more topic branches this release, so there are some merge commits in there on account of that. I'm afraid I didn't do a good job of putting meaningful comments in the first couple of merges. Sorry about that. I think I have the hang of it now. For 3.14-rc1 there are fixes in the areas of remote attributes, discard, growfs, memory leaks in recovery, directory v2, quotas, the MAINTAINERS file, allocation alignment, extent list locking, and in xfs_bmapi_allocate. There are cleanups in xfs_setsize_buftarg, removing unused macros, quotas, setattr, and freeing of inode clusters. The in-memory and on-disk log format have been decoupled, a common helper to calculate the number of blocks in an inode cluster has been added, and handling of i_version has been pulled into the filesystems that use it. - cleanup in xfs_setsize_buftarg - removal of remaining unused flags for vop toss/flush/flushinval - fix for memory corruption in xfs_attrlist_by_handle - fix for out-of-date comment in xfs_trans_dqlockedjoin - fix for discard if range length is less than one block - fix for overrun of agfl buffer using growfs on v4 superblock filesystems - pull i_version handling out into the filesystems that use it - don't leak recovery items on error - fix for memory leak in xfs_dir2_node_removename - several cleanups for quotas - fix bad assertion in xfs_qm_vop_create_dqattach - cleanup for xfs_setattr_mode, and add xfs_setattr_time - fix quota assert in xfs_setattr_nonsize - fix an infinite loop when turning off group/project quota before user quota - fix for temporary buffer allocation failure in xfs_dir2_block_to_sf with large directory block sizes - fix Dave's email address in MAINTAINERS - cleanup calculation of freed inode cluster blocks - fix alignment of initial file allocations to match filesystem geometry - decouple in-memory and on-disk log format - introduce a common helper to calculate the number of filesystem blocks in an inode cluster - fixes for extent list locking - fix for off-by-one in xfs_attr3_rmt_verify - fix for missing destroy_work_on_stack in xfs_bmapi_allocate" * tag 'xfs-for-linus-v3.14-rc1' of git://oss.sgi.com/xfs/xfs: (51 commits) xfs: Calling destroy_work_on_stack() to pair with INIT_WORK_ONSTACK() xfs: fix off-by-one error in xfs_attr3_rmt_verify xfs: assert that we hold the ilock for extent map access xfs: use xfs_ilock_attr_map_shared in xfs_attr_list_int xfs: use xfs_ilock_attr_map_shared in xfs_attr_get xfs: use xfs_ilock_data_map_shared in xfs_qm_dqiterate xfs: use xfs_ilock_data_map_shared in xfs_qm_dqtobp xfs: take the ilock around xfs_bmapi_read in xfs_zero_remaining_bytes xfs: reinstate the ilock in xfs_readdir xfs: add xfs_ilock_attr_map_shared xfs: rename xfs_ilock_map_shared xfs: remove xfs_iunlock_map_shared xfs: no need to lock the inode in xfs_find_handle xfs: use xfs_icluster_size_fsb in xfs_imap xfs: use xfs_icluster_size_fsb in xfs_ifree_cluster xfs: use xfs_icluster_size_fsb in xfs_ialloc_inode_init xfs: use xfs_icluster_size_fsb in xfs_bulkstat xfs: introduce a common helper xfs_icluster_size_fsb xfs: get rid of XFS_IALLOC_BLOCKS macros xfs: get rid of XFS_INODE_CLUSTER_SIZE macros ...
| * | | fs: fix iversion handlingChristoph Hellwig2013-12-051-0/+4
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently notify_change directly updates i_version for size updates, which not only is counter to how all other fields are updated through struct iattr, but also breaks XFS, which need inode updates to happen under its own lock, and synchronized to the structure that gets written to the log. Remove the update in the common code, and it to btrfs and ext4, XFS already does a proper updaste internally and currently gets a double update with the existing code. IMHO this is 3.13 and -stable material and should go in through the XFS tree. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Acked-by: Jan Kara <jack@suse.cz> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Chris Mason <clm@fb.com> Signed-off-by: Ben Myers <bpm@sgi.com>
* | / ext4: fix bigalloc regressionEric Whitney2014-01-061-1/+1
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | Commit f5a44db5d2 introduced a regression on filesystems created with the bigalloc feature (cluster size > blocksize). It causes xfstests generic/006 and /013 to fail with an unexpected JBD2 failure and transaction abort that leaves the test file system in a read only state. Other xfstests run on bigalloc file systems are likely to fail as well. The cause is the accidental use of a cluster mask where a cluster offset was needed in ext4_ext_map_blocks(). Signed-off-by: Eric Whitney <enwlinux@gmail.com>
* | ext4: add explicit casts when masking cluster sizesTheodore Ts'o2013-12-203-17/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The missing casts can cause the high 64-bits of the physical blocks to be lost. Set up new macros which allows us to make sure the right thing happen, even if at some point we end up supporting larger logical block numbers. Thanks to the Emese Revfy and the PaX security team for reporting this issue. Reported-by: PaX Team <pageexec@freemail.hu> Reported-by: Emese Revfy <re.emese@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* | ext4: fix deadlock when writing in ENOSPC conditionsJan Kara2013-12-181-12/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Akira-san has been reporting rare deadlocks of his machine when running xfstests test 269 on ext4 filesystem. The problem turned out to be in ext4_da_reserve_metadata() and ext4_da_reserve_space() which called ext4_should_retry_alloc() while holding i_data_sem. Since ext4_should_retry_alloc() can force a transaction commit, this is a lock ordering violation and leads to deadlocks. Fix the problem by just removing the retry loops. These functions should just report ENOSPC to the caller (e.g. ext4_da_write_begin()) and that function must take care of retrying after dropping all necessary locks. Reported-and-tested-by: Akira Fujita <a-fujita@rs.jp.nec.com> Reviewed-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* | ext4: Do not reserve clusters when fs doesn't support extentsJan Kara2013-12-081-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the filesystem doesn't support extents (like in ext2/3 compatibility modes), there is no need to reserve any clusters. Space estimates for writing are exact, hole punching doesn't need new metadata, and there are no unwritten extents to convert. This fixes a problem when filesystem still having some free space when accessed with a native ext2/3 driver suddently reports ENOSPC when accessed with ext4 driver. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* | ext4: fix del_timer() misuse for ->s_err_reportAl Viro2013-12-081-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | That thing should be del_timer_sync(); consider what happens if ext4_put_super() call of del_timer() happens to come just as it's getting run on another CPU. Since that timer reschedules itself to run next day, you are pretty much guaranteed that you'll end up with kfree'd scheduled timer, with usual fun consequences. AFAICS, that's -stable fodder all way back to 2010... [the second del_timer_sync() is almost certainly not needed, but it doesn't hurt either] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* | ext4: check for overlapping extents in ext4_valid_extent_entries()Eryu Guan2013-12-031-1/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A corrupted ext4 may have out of order leaf extents, i.e. extent: lblk 0--1023, len 1024, pblk 9217, flags: LEAF UNINIT extent: lblk 1000--2047, len 1024, pblk 10241, flags: LEAF UNINIT ^^^^ overlap with previous extent Reading such extent could hit BUG_ON() in ext4_es_cache_extent(). BUG_ON(end < lblk); The problem is that __read_extent_tree_block() tries to cache holes as well but assumes 'lblk' is greater than 'prev' and passes underflowed length to ext4_es_cache_extent(). Fix it by checking for overlapping extents in ext4_valid_extent_entries(). I hit this when fuzz testing ext4, and am able to reproduce it by modifying the on-disk extent by hand. Also add the check for (ee_block + len - 1) in ext4_valid_extent() to make sure the value is not overflow. Ran xfstests on patched ext4 and no regression. Cc: Lukáš Czerner <lczerner@redhat.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* | ext4: fix use-after-free in ext4_mb_new_blocksJunho Ryu2013-12-031-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ext4_mb_put_pa should hold pa->pa_lock before accessing pa->pa_count. While ext4_mb_use_preallocated checks pa->pa_deleted first and then increments pa->count later, ext4_mb_put_pa decrements pa->pa_count before holding pa->pa_lock and then sets pa->pa_deleted. * Free sequence ext4_mb_put_pa (1): atomic_dec_and_test pa->pa_count ext4_mb_put_pa (2): lock pa->pa_lock ext4_mb_put_pa (3): check pa->pa_deleted ext4_mb_put_pa (4): set pa->pa_deleted=1 ext4_mb_put_pa (5): unlock pa->pa_lock ext4_mb_put_pa (6): remove pa from a list ext4_mb_pa_callback: free pa * Use sequence ext4_mb_use_preallocated (1): iterate over preallocation ext4_mb_use_preallocated (2): lock pa->pa_lock ext4_mb_use_preallocated (3): check pa->pa_deleted ext4_mb_use_preallocated (4): increase pa->pa_count ext4_mb_use_preallocated (5): unlock pa->pa_lock ext4_mb_release_context: access pa * Use-after-free sequence [initial status] <pa->pa_deleted = 0, pa_count = 1> ext4_mb_use_preallocated (1): iterate over preallocation ext4_mb_use_preallocated (2): lock pa->pa_lock ext4_mb_use_preallocated (3): check pa->pa_deleted ext4_mb_put_pa (1): atomic_dec_and_test pa->pa_count [pa_count decremented] <pa->pa_deleted = 0, pa_count = 0> ext4_mb_use_preallocated (4): increase pa->pa_count [pa_count incremented] <pa->pa_deleted = 0, pa_count = 1> ext4_mb_use_preallocated (5): unlock pa->pa_lock ext4_mb_put_pa (2): lock pa->pa_lock ext4_mb_put_pa (3): check pa->pa_deleted ext4_mb_put_pa (4): set pa->pa_deleted=1 [race condition!] <pa->pa_deleted = 1, pa_count = 1> ext4_mb_put_pa (5): unlock pa->pa_lock ext4_mb_put_pa (6): remove pa from a list ext4_mb_pa_callback: free pa ext4_mb_release_context: access pa AddressSanitizer has detected use-after-free in ext4_mb_new_blocks Bug report: http://goo.gl/rG1On3 Signed-off-by: Junho Ryu <jayr@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* | ext4: call ext4_error_inode() if jbd2_journal_dirty_metadata() failsTheodore Ts'o2013-12-021-0/+9
|/ | | | | | | | | | | | | | | | | | | | | | | | While it's true that errors can only happen if there is a bug in jbd2_journal_dirty_metadata(), if a bug does happen, we need to halt the kernel or remount the file system read-only in order to avoid further data loss. The ext4_journal_abort_handle() function doesn't do any of this, and while it's likely that this call (since it doesn't adjust refcounts) will likely result in the file system eventually deadlocking since the current transaction will never be able to close, it's much cleaner to call let ext4's error handling system deal with this situation. There's a separate bug here which is that if certain jbd2 errors errors occur and file system is mounted errors=continue, the file system will probably eventually end grind to a halt as described above. But things have been this way in a long time, and usually when we have these sorts of errors it's pretty much a disaster --- and that's why the jbd2 layer aggressively retries memory allocations, which is the most likely cause of these jbd2 errors. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
* Merge tag 'ext4_for_linus' of ↵Linus Torvalds2013-11-1411-127/+168
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 changes from Ted Ts'o: "Ext4 updates for 3.13. Mostly bug fixes and cleanups" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: add prototypes for macro-generated functions ext4: return non-zero st_blocks for inline data ext4: use prandom_u32() instead of get_random_bytes() ext4: remove unreachable code after ext4_can_extents_be_merged() ext4: remove unreachable code in ext4_can_extents_be_merged() ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea() ext4: don't count free clusters from a corrupt block group ext4: fix FITRIM in no journal mode ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline() ext4: change ext4_read_inline_dir() to return 0 on success ext4: pair trace_ext4_writepages & trace_ext4_writepages_result ext4: add ratelimiting to ext4 messages ext4: fix performance regression in ext4_writepages ext4: fixup kerndoc annotation of mpage_map_and_submit_extent() ext4: fix assertion in ext4_add_complete_io()
| * ext4: add prototypes for macro-generated functionsAndreas Dilger2013-11-111-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | It isn't very easy to find the declarations for the functions created by EXT4_INODE_BIT_FNS() because the names are generated by macros: ext4_test_inode_flag, ext4_set_inode_flag, ext4_clear_inode_flag ext4_test_inode_state, ext4_set_inode_state, ext4_clear_inode_state Add explicit declarations for these functions so that grep and tags can find them. Signed-off-by: Andreas Dilger <adilger@dilger.ca> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: return non-zero st_blocks for inline dataAndreas Dilger2013-11-111-3/+11
| | | | | | | | | | | | | | | | | | Return a non-zero st_blocks to userspace for statfs() and friends. Some versions of tar will assume that files with st_blocks == 0 do not contain any data and will skip reading them entirely. Signed-off-by: Andreas Dilger <andreas.dilger@intel.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: use prandom_u32() instead of get_random_bytes()Theodore Ts'o2013-11-083-7/+4
| | | | | | | | | | | | | | | | | | Many of the uses of get_random_bytes() do not actually need cryptographically secure random numbers. Replace those uses with a call to prandom_u32(), which is faster and which doesn't consume entropy from the /dev/random driver. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: remove unreachable code after ext4_can_extents_be_merged()Eric Sandeen2013-11-071-26/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ec22ba8e ("ext4: disable merging of uninitialized extents") ensured that if either extent under consideration is uninit, we decline to merge, and ext4_can_extents_be_merged() returns false. So there is no need for the caller to then test whether the extent under consideration is unitialized; if it were, we wouldn't have gotten that far. The comments were also inaccurate; ext4_can_extents_be_merged() no longer XORs the states, it fails if *either* is uninit. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
| * ext4: remove unreachable code in ext4_can_extents_be_merged()Eric Sandeen2013-11-041-7/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ec22ba8e ("ext4: disable merging of uninitialized extents") ensured that if either extent under consideration is uninit, we decline to merge, and immediately return. But right after that test, we test again for an uninit extent; we can never hit this. So just remove the impossible test and associated variable. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
| * ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()Theodore Ts'o2013-10-311-0/+1
| | | | | | | | | | | | Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
| * ext4: don't count free clusters from a corrupt block groupDarrick J. Wong2013-10-311-2/+11
| | | | | | | | | | | | | | | | | | | | | | A bg that's been flagged "corrupt" by definition has no free blocks, so that the allocator won't be tempted to use the damaged bg. Therefore, we shouldn't count the clusters in the damaged group when calculating free counts. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
| * ext4: fix FITRIM in no journal modeLukas Czerner2013-10-301-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | When using FITRIM ioctl on a file system without journal it will only trim the block group once, no matter how many times you invoke FITRIM ioctl and how many block you release from the block group. It is because we only clear EXT4_GROUP_INFO_WAS_TRIMMED_BIT in journal callback. Fix this by clearing the bit in no journal mode as well. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reported-by: Jorge Fábregas <jorge.fabregas@gmail.com>
| * ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()Azat Khuzhin2013-10-301-2/+0
| | | | | | | | | | Signed-off-by: Azat Khuzhin <a3at.mail@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: change ext4_read_inline_dir() to return 0 on successBoxiLiu2013-10-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | In ext4_read_inline_dir(), if there is inline data, the successful return value is the return value of ext4_read_inline_data(). Howewer, this is used by ext4_readdir(), and while it seems harmless to return a positive value on success, it's inconsistent, since historically we've always return 0 on success. Signed-off-by: BoxiLiu <lewis.liulei@huawei.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Tao Ma <boyu.mt@taobao.com>
| * ext4: pair trace_ext4_writepages & trace_ext4_writepages_resultMing Lei2013-10-301-5/+6
| | | | | | | | | | | | | | | | | | | | | | Pair the two trace events to make troubeshooting writepages easier, and it should be more convinient to write a simple script to parse the traces. Cc: linux-ext4@vger.kernel.org Cc: Jan Kara <jack@suse.cz> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| * ext4: add ratelimiting to ext4 messagesTheodore Ts'o2013-10-172-58/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In the case of a storage device that suddenly disappears, or in the case of significant file system corruption, this can result in a huge flood of messages being sent to the console. This can overflow the file system containing /var/log/messages, or if a serial console is configured, this can slow down the system so much that a hardware watchdog can end up triggering forcing a system reboot. Google-Bug-Id: 7258357 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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