Date: Sun, 28 May 2006 18:18:58 +0200
From: Nicolas George <nicolas.george@ens.fr>
To: linux-kernel@vger.kernel.org
Subject: [UDF] (bogus?) overlap of directories and files
Message-ID: <20060528161858.GA4705@clipper.ens.fr>
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Hi.

<I-tell-my-life>

I have a hard drive with an UDF filesystem, and something strange happened a
few weeks ago: I had a directory foo, then I created a file bar at a
completely different place; after that, foo was no longer a directory, it
was a plain file, a hard-link to the newly created bar, except that the link
count was wrong. Obviously there is a bug somewhere.

Since then, I spent part of my free-time to dissect my filesystem, and I
found the following strange detail.

</I-tell-my-life>


Some directories have eight allocated unrecorded (extent.length >> 30 =3D=
=3D 1,
according to ECMA 167, 4/14.14.1.1, page 4/46) sectors at the end. The
strange thing is that some of these sectors also belong to others files or
directories, as recorded sectors.

Is this situation normal?

(For the record, I am currently using a 2.6.14.1 kernel, but I did not see
anything related in the ChangeLog of later releases.)


PS: I managed to build and run fsck.udf from OpenSolaris under GNU/Linux,
but it seems to be limited to version 2 records, while Linux produces both
version 2 and version 3 records, so it did not help. I intend to release the
tools I have written to dissect my filesystem, but they still need a lot of
work.


Regards,

--=20
  Nicolas George

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