Message-ID: <4BE7ED5D.90801@itwm.fraunhofer.de>
Date: Mon, 10 May 2010 13:26:21 +0200
From: Martin Vogt <martin.vogt@itwm.fraunhofer.de>
To: linux-nfs@vger.kernel.org
Subject: permission denied with >= ~2.6.25
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Sender: linux-nfs-owner@vger.kernel.org
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Hello list,

recently I updated my client to a new vendor kernel(SLES11), but the
problem is the same if I use a 2.6.33.3 as a client.

If I'm doing svn checkouts in an endless loop,
or running make -j X builds sometimes it happens
that I get a "Permision denied" error.

If I strace it, for svn, the following sequence appears:


5262  rename("Kernel.ERWQPsWCA5/.svn/tmp/entries",
"Kernel.ERWQPsWCA5/.svn/entries") = 0
5262  lstat("Kernel.ERWQPsWCA5/.svn/entries", {st_mode=S_IFREG|0666,
st_size=205, ...}) = 0
5262  chmod("Kernel.ERWQPsWCA5/.svn/entries", 0444) = 0
5262  open("Kernel.ERWQPsWCA5/.svn/format.tmp", O_RDWR|O_CREAT|O_EXCL,
0666) = 3
5262  write(3, "9\n", 2)                = 2
5262  close(3)                          = 0


5262  rename("Kernel.ERWQPsWCA5/.svn/format.tmp",
"Kernel.ERWQPsWCA5/.svn/format") = 0
5262  lstat("Kernel.ERWQPsWCA5/.svn/format", 0x7fff79949350) = -1 EACCES
(Permission denied)
^^^^^^^^^^^^ Here

5262  write(2, "svn: Can't change perms of file "..., 83) = 83
5262  lstat("Kernel.ERWQPsWCA5/.svn/log", 0x7fff79949650) = -1 ENOENT
(No such file or directory)
5262  unlink("Kernel.ERWQPsWCA5/.svn/lock") = 0


After a rename, the lstat call fails. I tried to isolate it,
but without any luck so far.

I dont have the problem if I go back to my vendor kernel <= 2.6.22.
I wonder if its more a NFS Server problem or a problem on the client
side so I tried writing a C programm to trigger this behaviour.
But without any success so far.

Maybe this problem is already known?


regards,

Martin