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| author | Jan Kara <jack@suse.cz> | 2011-05-03 11:05:55 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-05-03 11:05:55 -0400 |
| commit | 7ad8e4e6ae2a7c95445ee1715b1714106fb95037 (patch) | |
| tree | f3cb6f1d364e2a1f9036216edfcbdcb94e4d489f /fs/ext4 | |
| parent | 74e4e6db38918620bdf8a46e94982ead2b228d43 (diff) | |
| download | linux-0-day-7ad8e4e6ae2a7c95445ee1715b1714106fb95037.tar.gz linux-0-day-7ad8e4e6ae2a7c95445ee1715b1714106fb95037.tar.xz | |
ext4: Fix fs corruption when make_indexed_dir() fails
When make_indexed_dir() fails (e.g. because of ENOSPC) after it has
allocated block for index tree root, we did not properly mark all
changed buffers dirty. This lead to only some of these buffers being
written out and thus effectively corrupting the directory.
Fix the issue by marking all changed data dirty even in the error
failure case.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/namei.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 67fd0b0258589..cadf04b924aad 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1414,9 +1414,19 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry, frame->bh = bh; bh = bh2; de = do_split(handle,dir, &bh, frame, &hinfo, &retval); - dx_release (frames); - if (!(de)) + if (!de) { + /* + * Even if the block split failed, we have to properly write + * out all the changes we did so far. Otherwise we can end up + * with corrupted filesystem. + */ + ext4_mark_inode_dirty(handle, dir); + ext4_handle_dirty_metadata(handle, dir, frame->bh); + ext4_handle_dirty_metadata(handle, dir, bh); + dx_release(frames); return retval; + } + dx_release(frames); retval = add_dirent_to_buf(handle, dentry, inode, de, bh); brelse(bh); |