Re: regression: am-utils stopped working in 2.6.25-rc*

[Benny Halevy <bhalevy@panasas.com>]

On Apr. 02, 2008, 1:14 +0300, Trond Myklebust <trond.myklebust@fys.uio.no> wrote:
> On Tue, 2008-04-01 at 17:07 -0400, J. Bruce Fields wrote:
>> On Fri, Mar 28, 2008 at 03:20:18PM +0200, Meelis Roos wrote:
>>> Current 2.6.25-rc* kernels have broken am-utils (NFS-based automounter) 
>>> support. No error messages, just "no such file or directory" when trying 
>>> to enter /net/anotherhostname. Just tried 2.6.24 and that worked fine. 
>>> am-utils is the latest in Debian unstable, 6.1.5-9.
>>>
>>> Earliest 2.6.25-rc currently tested was 2.6.25-rc3+git as of 20080304. 
>>> This version reports 
>>> Invalid hostname "pid3477@koiott:/net" in NFS lock request
>>> into dmesg and am-utils does not work.
>>>
>>> 2.6.25-rc4+git as of 20080310 and later ones do not show this message 
>>> but am-utils does still not work.
>>>
>>> Will try bisecting it further.
>> Have you figured out anything more?  Can strace show exactly which
>> system call is  failing?
> 
> See the bugzilla report:
>   http://bugzilla.kernel.org/show_bug.cgi?id=10349

FWIW, I've already opened this bug on am-utils's bugzilla:
https://bugzilla.am-utils.org/show_bug.cgi?id=612

I updated it with the info on this message.

Benny

> 
> I'm still waiting to hear back from Meelis, but to me this looks like an
> am-utils bug.
> 
> AFAICS, am-utils advertises a binary NFS mount structure version of '6',
> to the mount() syscall, but internally they only initialise the
> equivalent of a version '4' structure.
> When
>      http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git&a=commitdiff&h=f9c3a3802119a2d30f3e4a69aef30a81e09d0209
> was merged, then this failure to initialise the selinux 'context' field
> causes mount() to return an EINVAL.
> 
> Cheers
>   Trond
> 
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