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| author | Theodore Ts'o <tytso@mit.edu> | 2023-03-08 05:15:49 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-03-11 06:44:24 +0100 |
| commit | 62913ae96de747091c4dacd06d158e7729c1a76d (patch) | |
| tree | b8216b43eed65fb2f7ddbedb9bdb7697a890b861 /include | |
| parent | ext4: fix WARNING in ext4_update_inline_data (diff) | |
| download | linux-62913ae96de747091c4dacd06d158e7729c1a76d.tar.xz linux-62913ae96de747091c4dacd06d158e7729c1a76d.zip | |
ext4, jbd2: add an optimized bmap for the journal inode
The generic bmap() function exported by the VFS takes locks and does
checks that are not necessary for the journal inode. So allow the
file system to set a journal-optimized bmap function in
journal->j_bmap.
Reported-by: syzbot+9543479984ae9e576000@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=e4aaa78795e490421c79f76ec3679006c8ff4cf0
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/jbd2.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 2170e0cc279d..6ffa34c51a11 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -1308,6 +1308,14 @@ struct journal_s struct buffer_head *bh, enum passtype pass, int off, tid_t expected_commit_id); + + /** + * @j_bmap: + * + * Bmap function that should be used instead of the generic + * VFS bmap function. + */ + int (*j_bmap)(struct journal_s *journal, sector_t *block); }; #define jbd2_might_wait_for_commit(j) \ |