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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2014-10-13 03:36:16 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-10-13 03:36:16 -0400 |
| commit | 9aa5d32ba269bec0e7eaba2697a986a7b0bc8528 (patch) | |
| tree | 3702c0a5ff64152ecd33d7469164832a7811f28f /fs/ext4/resize.c | |
| parent | 65dd8327eb055a393a413a2214f70a9a10ff7ad6 (diff) | |
| download | linux-9aa5d32ba269bec0e7eaba2697a986a7b0bc8528.tar.gz | |
ext4: Replace open coded mdata csum feature to helper function
Besides the fact that this replacement improves code readability it also protects from errors caused direct EXT4_S(sb)->s_es manipulation which may result attempt to use uninitialized csum machinery. #Testcase_BEGIN IMG=/dev/ram0 MNT=/mnt mkfs.ext4 $IMG mount $IMG $MNT #Enable feature directly on disk, on mounted fs tune2fs -O metadata_csum $IMG # Provoke metadata update, likey result in OOPS touch $MNT/test umount $MNT #Testcase_END # Replacement script @@ expression E; @@ - EXT4_HAS_RO_COMPAT_FEATURE(E, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) + ext4_has_metadata_csum(E) https://bugzilla.kernel.org/show_bug.cgi?id=82201 Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/ext4/resize.c')
| -rw-r--r-- | fs/ext4/resize.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index bb0e80f03e2e..d5afb0a0cf25 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -1210,8 +1210,7 @@ static int ext4_set_bitmap_checksums(struct super_block *sb, { struct buffer_head *bh; - if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, - EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) + if (!ext4_has_metadata_csum(sb)) return 0; bh = ext4_get_bitmap(sb, group_data->inode_bitmap); |