Re: [Ext2-devel] Re: [BK PATCH] Add ext3 indexed directory (htree) support

Andreas Dilger
2002-09-28T17:24:48Z

On Sep 28, 2002 10:13 -0400, Theodore Ts'o wrote:
> The nature of the corruption is that a directory entry of size 8
> (which is enough room for a zero-length name) is left in the
> directory. This is harmless, but it should never happen normally, and
> so the ext3 sanity-checking code flags it as an error. With this
> patch, e2fsck is much smarter about salvaging corrupt directories, and
> so it can do so without causing any directory entries to be lost.
> (This corrupted, too-small directory entry appears at the beginning of
> the directory block, which is another reason why I strongly suspect
> the dx_split code.)

One idea I just had but don't have time to investigate (babysitting
both kids today) is if the do_split() code is creating a hash entry
for unused dir entries (i.e. inode == 0 or name_len == 0). If that
is the case, then it could explain the presence of this short entry.

Cheers, Andreas
--
Andreas Dilger