[OpenAFS] Strange access problems on one client

Derrick Brashear shadow@gmail.com
Tue, 25 Sep 2007 13:59:33 -0400


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On 9/25/07, Russ Allbery <rra@stanford.edu> wrote:
>
> Dirk Heinrichs <dirk.heinrichs@online.de> writes:
>
> > since I got a mail from another person who had this same problem, I
> > would like to follow up on this. Here's what I wrote back in august:
>
> [...]
>
> > The problem seems to be independent of the server(s) or cell, because it
> > also happens when I try to access public cells on the internet, running
> > completely unauthenticated, like:
>
> > heini@gondolin ~ % LANG="" ll /afs/grand.central.org/
> > ls: cannot access /afs/grand.central.org/local: No such file or
> directory
> > ls: cannot access /afs/grand.central.org/software: No such file or
> directory
> > total 14K
> > drwxrwxrwx 3 root root 2.0K Jun 17  2004 archive/
> > drwxrwxrwx 2 root root 2.0K May  7  2006 cvs/
> > drwxrwxrwx 3 root root 2.0K Mar 21  2003 doc/
> > ?????????? ? ?    ?       ?            ? local
> > drwxrwxrwx 2 root root 2.0K Jun 17  2005 project/
> > drwxrwxrwx 5 root root 2.0K Jan 30  2007 service/
> > ?????????? ? ?    ?       ?            ? software
> > drwxrwxrwx 2 root root 2.0K Aug 25 00:15 user/
> > drwxrwxrwx 5 root root 2.0K Aug 24 20:10 www/
>
> [...]
>
> > Kernel: Vanilla 2.6.22.7
> > OpenAFS: Gentoo Package openafs-kernel-1.4.4_p20070724-r2
>
> It looks like this is Linux kernel breakage.  According to a Debian bug
> reporter with the same problem, it appears to reliably trigger on x86 with
> 2.6.22.6, and reliably not trigger with 2.6.22.5.  He's seeing the problem
> on x86_64 on both 2.6.22.5 and 2.6.22.7, but this wouldn't be the first
> time that something changed on x86_64 first.
>
> I haven't had a chance to double-check that I'm *not* seeing this on my
> x86_64 system with an older kernel, but I know I wasn't earlier.
>
> I have no idea what might have broken.


Having fstrace output might help here.

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<br><br><div><span class="gmail_quote">On 9/25/07, <b class="gmail_sendername">Russ Allbery</b> &lt;<a href="mailto:rra@stanford.edu">rra@stanford.edu</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Dirk Heinrichs &lt;<a href="mailto:dirk.heinrichs@online.de">dirk.heinrichs@online.de</a>&gt; writes:<br><br>&gt; since I got a mail from another person who had this same problem, I<br>&gt; would like to follow up on this. Here&#39;s what I wrote back in august:
<br><br>[...]<br><br>&gt; The problem seems to be independent of the server(s) or cell, because it<br>&gt; also happens when I try to access public cells on the internet, running<br>&gt; completely unauthenticated, like:<br>
<br>&gt; heini@gondolin ~ % LANG=&quot;&quot; ll /afs/grand.central.org/<br>&gt; ls: cannot access /afs/grand.central.org/local: No such file or directory<br>&gt; ls: cannot access /afs/grand.central.org/software: No such file or directory
<br>&gt; total 14K<br>&gt; drwxrwxrwx 3 root root 2.0K Jun 17&nbsp;&nbsp;2004 archive/<br>&gt; drwxrwxrwx 2 root root 2.0K May&nbsp;&nbsp;7&nbsp;&nbsp;2006 cvs/<br>&gt; drwxrwxrwx 3 root root 2.0K Mar 21&nbsp;&nbsp;2003 doc/<br>&gt; ?????????? ? ?&nbsp;&nbsp;&nbsp;&nbsp;?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;? local
<br>&gt; drwxrwxrwx 2 root root 2.0K Jun 17&nbsp;&nbsp;2005 project/<br>&gt; drwxrwxrwx 5 root root 2.0K Jan 30&nbsp;&nbsp;2007 service/<br>&gt; ?????????? ? ?&nbsp;&nbsp;&nbsp;&nbsp;?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;? software<br>&gt; drwxrwxrwx 2 root root 2.0K Aug 25 00:15 user/
<br>&gt; drwxrwxrwx 5 root root 2.0K Aug 24 20:10 www/<br><br>[...]<br><br>&gt; Kernel: Vanilla <a href="http://2.6.22.7">2.6.22.7</a><br>&gt; OpenAFS: Gentoo Package openafs-kernel-1.4.4_p20070724-r2<br><br>It looks like this is Linux kernel breakage.&nbsp;&nbsp;According to a Debian bug
<br>reporter with the same problem, it appears to reliably trigger on x86 with<br><a href="http://2.6.22.6">2.6.22.6</a>, and reliably not trigger with <a href="http://2.6.22.5">2.6.22.5</a>.&nbsp;&nbsp;He&#39;s seeing the problem<br>
on x86_64 on both <a href="http://2.6.22.5">2.6.22.5</a> and <a href="http://2.6.22.7">2.6.22.7</a>, but this wouldn&#39;t be the first<br>time that something changed on x86_64 first.<br><br>I haven&#39;t had a chance to double-check that I&#39;m *not* seeing this on my
<br>x86_64 system with an older kernel, but I know I wasn&#39;t earlier.<br><br>I have no idea what might have broken.</blockquote><div><br>Having fstrace output might help here.<br><br></div><br></div><br>

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