iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

f2fs: do not allow partial truncation on pinned file

Browse Source 
[ Upstream commit 5fed0be8583f08c1548b4dcd9e5ee0d1133d0730 ]

If the pinned file has a hole by partial truncation, application that has
the block map will be broken.

Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Stable-dep-of: 278a6253a673 ("f2fs: fix to relocate check condition in f2fs_fallocate()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jaegeuk Kim 2022-01-07 20:08:45 -08:00 committed by Greg Kroah-Hartman
parent 4f0750bf8a
commit 603c0c3a83
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/f2fs/file.c
View File

@ -1760,7 +1760,11 @@ static long f2fs_fallocate(struct file *file, int mode,
(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
return -EOPNOTSUPP;
if (f2fs_compressed_file(inode) &&
/*
* Pinned file should not support partial trucation 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;