From: Jan Kara <[email protected]> ------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. -------------------
commit 7ad8e4e6ae2a7c95445ee1715b1714106fb95037 upstream. 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 <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]> Signed-off-by: Paul Gortmaker <[email protected]> --- fs/ext4/namei.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 2f31631935ba..caa3c77f1743 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1452,9 +1452,19 @@ 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); -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
