Re: [PATCH 00/19] lnfs: 3.9-rc5 release

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On 23/04/13 14:40, Mimi Zohar wrote:
> On Tue, 2013-04-23 at 14:04 -0400, Steve Dickson wrote:
>> On 23/04/13 13:22, J. Bruce Fields wrote:
>>>>> What exactly was failing?
>>>>>
>>>>> Sorry I can't find the results right now.  I'll re-run and let you know.
>>> The server is returning -EOPNOTSUPP in response to an nfs4 SETATTR which
>>> sets a mode.
>>>
>>> The operation shouldn't be failing, and if it does it should return an
>>> NFS error, not -ERRNO.
>>>
>>> I can't reproduce this just by doing chmod on the linux client.  I'm not
>>> sure what pynfs is doing differently to trigger the bug.
>> thanks for talking a look...  
>>
>> Hmm... I wonder if the fact nfsd4_set_nfs4_label() is returning 
>> -EOPNOTSUPP instead of something like nfserr_attrnotsupp when 
>> labels are not configured... Something you've pointed out 
>> twice now... 
>>     http://www.spinics.net/lists/linux-nfs/msg36104.html
>>
>> If it is this problem I wonder why a chmod would not trigger it...
> 
> Do you by any chance have EVM enabled?  EVM includes the i_mode in the
> HMAC calculation.  Anytime the i_mode changes, the existing HMAC is
> verified, before recalculating the HMAC to reflect the change.  The
> hooks are there to update the HMAC, when using chmod.
No. CONFIG_EVM is not set.

steved.

> 
> I posted a couple of patches to audit this type of error last week, but
> haven't sent a pull request yet.
> 
> evm: audit integrity metadata failures
> integrity: move integrity_audit_msg()
> evm: calculate HMAC after initializing posix acl
> 
> thanks,
> 
> Mimi
> 
> 
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