Message-ID: <433C2CB6.5040903@poczta.fm>
Date: Thu, 29 Sep 2005 20:04:38 +0200
From: Lukasz Stelmach <stlman@poczta.fm>
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To: LKML <linux-kernel@vger.kernel.org>
Subject: udf uid/gid problem.
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Greetings.

A while ago someone, please forgive me I don't remeber exactly who,
stated here that UDF is much better than FAT for flash-drives. So I
try to use it this way. Unfortunately there seem to be a bug in kernel
rendering UDF on portable media completrly useless.

A filesystem for portable media should be "userless" because one most
probably has different uids on different machines. The first problem is
that I am unable to use uid=3D/gid=3D options if UDF volume's root direct=
ory
(super-block???) has an owner of uid differnet than -1. In any other
case the on-volume owner/group takes precedence over uid=3D/gid=3D option=
s.

The second bug lives somewhere in writing functions. If I set the root
(sb???) owner to -1, the uid=3D and gid=3D work until I write a single fi=
le
onto the volume. Next time I mount the volume, with uid=3D/gid=3D of cour=
se,
everything on it is owned by root:root.

No.3 If I create a volum with root directory (sb???) owned root:root,
without hacking mkudffs, and I chown(1) some files, file ownership
information also doesn't survive unmounting.

=46rom what I know UDF could really be a superb filesystem for flash
memory devices but today it is unfortunately completly useless. I might
even forget about the ownership information, as I said it's useless or
even harmfull on portables but setting the "root" of the volum is crucial=
=2E

Best regards.
PS. Please remember to CC, I'am not a subscriber.
--=20
By=C5=82o mi bardzo mi=C5=82o.                    Trzecia pospolita kl=C4=
=99ska, [...]
>=C5=81ukasz<                      Ju=C5=BC nie katolicka lecz z=C5=82odz=
iejska.  (c)PP


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