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f2fs: fix to relocate check condition in f2fs_fallocate()

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[ Upstream commit 278a6253a6 ]

compress and pinfile flag should be checked after inode lock held to
avoid race condition, fix it.

Fixes: 4c8ff7095b ("f2fs: support data compression")
Fixes: 5fed0be858 ("f2fs: do not allow partial truncation on pinned file")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2024-04-03 22:24:19 +08:00 committed by Greg Kroah-Hartman
parent 116d824f95
commit 5632bdb4e9
1 changed files with 11 additions and 9 deletions
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20
fs/f2fs/file.c
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@ -1797,15 +1797,6 @@ static long f2fs_fallocate(struct file *file, int mode,
(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
return -EOPNOTSUPP; return -EOPNOTSUPP;
/*
* Pinned file should not support partial truncation since the block
* can be used by applications.
*/
if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE)))
return -EOPNOTSUPP;
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
FALLOC_FL_INSERT_RANGE)) FALLOC_FL_INSERT_RANGE))
@ -1813,6 +1804,17 @@ static long f2fs_fallocate(struct file *file, int mode,
inode_lock(inode); inode_lock(inode);
/*
* Pinned file should not support partial truncation since the block
* can be used by applications.
*/
if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) {
ret = -EOPNOTSUPP;
goto out;
}
ret = file_modified(file); ret = file_modified(file);
if (ret) if (ret)
goto out; goto out;