From: Frank Steiner <fsteiner-mail@bio.ifi.lmu.de>
Subject: Strange problem with ACL over NFS
Date: Thu, 30 Jun 2005 13:47:40 +0200
Message-ID: <42C3DBDC.5050803@bio.ifi.lmu.de>
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To: NFS NFS <nfs@lists.sourceforge.net>
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Hi,

I have a strange problem trying to use ACLs over NFS.

Our NFS server exports two directories /home and /rpm.
/rpm is exported ro, /home contains all the user homes
and is exported rw. Both are reiserfs.

The NFS server is running a 2.6.8 SuSE kernel (SuSE 9.2).
To activate ACLs, I stopped the nfs server, remounted
the local FS with acl and restarted the nfs server.
Then I set some acls on some files in /rpm and in /home.

Almost all clients (running the same kernel) could immediately
see the ACLs (i.e., the + sign in the ls output) on both
directories without remounting (so I guess the "defaults"
includes the acl option for NFS mounts already).

But on some hosts (especially some IBM xSeries) the ACLs
are visible in /rpm, but not in /home. Changing the lines
in fstab to "defaults,acl" didn't change that. The ACLs in
/home are not visible, even not after rebooting the host
several times (the "+" does not show up in ls, and getfacl
doesn't report any additional acls).

However, when I unmount /home and remount with "mount /home",
suddendly the ACLs are visible and can even be changed.
(just remounting with "-o remount" does not work).
But when rebooting the host, the ACLs are invisible again
until unmounting and remounting /home once again.

Any ideas what could go wrong here?

All the hosts are installed identically via autoyast (same
kernel, same software distribution, same mounts, users etc.)


cu,
Frank


-- 
Dipl.-Inform. Frank Steiner   Web:  http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik    Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17           Phone: +49 89 2180-4049
80333 Muenchen, Germany       Fax:   +49 89 2180-99-4049
* Rekursion kann man erst verstehen, wenn man Rekursion verstanden hat. *


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