linux-kernel - Re: nfs client doesn't work [was: mmotm 2011-03-31-14-48 uploaded]

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Message-ID: <4DA36DB6.8060108@suse.cz>
Date:	Mon, 11 Apr 2011 23:08:06 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	bjschuma@...app.com
CC:	"Myklebust, Trond" <Trond.Myklebust@...app.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	mm-commits@...r.kernel.org, ML netdev <netdev@...r.kernel.org>,
	linux-nfs@...r.kernel.org, Jiri Slaby <jirislaby@...il.com>
Subject: Re: nfs client doesn't work [was: mmotm 2011-03-31-14-48 uploaded]

On 04/11/2011 10:40 PM, Jiri Slaby wrote:
> Ccing Bryan
> 
> On 04/11/2011 10:40 PM, Jiri Slaby wrote:
>> On 04/07/2011 08:42 AM, Jiri Slaby wrote:
>>> On 04/06/2011 10:44 PM, Myklebust, Trond wrote:
>>>> On Sat, 2011-04-02 at 10:56 +0200, Jiri Slaby wrote:
>>>>> On 03/31/2011 11:48 PM, akpm@...ux-foundation.org wrote:
>>>>>> The mm-of-the-moment snapshot 2011-03-31-14-48 has been uploaded to
>>>>>
>>>>> Hi, nfs client is defunct in this kernel. Tcpdump says:
>>>>> 10:51:55.489717 IP 10.20.11.33.759945860 > 10.20.3.2.2049: 132 getattr
>>>>> fh 0,0/24
>>>>> 10:51:55.515927 IP 10.20.3.2.2049 > 10.20.11.33.759945860: reply ok 44
>>>>> getattr ERROR: Operation not permitted
>>>>> 10:51:55.515949 IP 10.20.11.33.921 > 10.20.3.2.2049: Flags [.], ack
>>>>> 3569361440, win 115, options [nop,nop,TS val 599750 ecr 255058541],
>>>> length 0
>>>>> 10:52:04.130310 IP 10.20.11.33.793500292 > 10.20.3.2.2049: 76 getattr fh
>>>>> 0,0/24
>>>>> 10:52:04.152178 IP 10.20.3.2.2049 > 10.20.11.33.793500292: reply ok 44
>>>>> getattr ERROR: Operation not permitted
>>>>>
>>>>> If I run the same mount command (mount -oro,intr host:dir mountpoint)
>>>>> from within a virtual machine with 2.6.38.2 there, everything mounts OK.
>>>>
>>>> Does the attached patch help?
>>>
>>> No, still the operation not permitted in the tcpdump output and no mount.
>>
>> The next tree from 20110411 still doesn't work. The topmost commit in
>> fs/nfs/namespace.c is:
>> commit 418875900e3de4831c84f86ae4756690dac5be77
>> Author: Bryan Schumaker <bjschuma@...app.com>
>> Date:   Wed Apr 6 14:33:28 2011 -0400
>>
>>     NFS: Fix a signed vs. unsigned secinfo bug
>>
>>
>> I bisected it to (in vanilla already):
>>
>> 8f70e95f9f4159184f557a1db60c909d7c1bd2e3 is the first bad commit
>> commit 8f70e95f9f4159184f557a1db60c909d7c1bd2e3
>> Author: Bryan Schumaker <bjschuma@...app.com>
>> Date:   Thu Mar 24 17:12:31 2011 +0000
>>
>>     NFS: Determine initial mount security
>>
>>     When sec=<something> is not presented as a mount option,
>>     we should attempt to determine what security flavor the
>>     server is using.
>>
>>     Signed-off-by: Bryan Schumaker <bjschuma@...app.com>
>>     Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
>>
>> :040000 040000 8e5a640b37e00f0df21e1d9cd9aff160df2d5938
>> 0152daa67bc8d12e32cda5f4a036807d2e380392 M      fs
>> :040000 040000 f74aa33f8597cb82cd0fd7d90d84e0660b7f5804
>> 527bc0ca6975cedc7e684b45dc9961f8aaf1207a M      include
>> :040000 040000 87559d2f211ea905343a86c8551b6610dd239891
>> 7e4ee0e5eddf12474b6de9e7fdb6218b6165bdb2 M      net

Sorry for an extra message. I've just found out that there appears
messages in dmesg:
[   58.656048] RPC: AUTH_GSS upcall timed out.
[   58.656050] Please check user daemon is running.
[   88.656065] RPC: AUTH_GSS upcall timed out.
[   88.656068] Please check user daemon is running.
[  118.656077] RPC: AUTH_GSS upcall timed out.
[  118.656080] Please check user daemon is running.
[  148.656049] RPC: AUTH_GSS upcall timed out.
[  148.656052] Please check user daemon is running.
[  178.656046] RPC: AUTH_GSS upcall timed out.
[  178.656049] Please check user daemon is running.


I instrumented the code and it's stuck with trying RPC_AUTH_GSS_KRB5.

I don't use GSS at all.

regards,
-- 
js
suse labs
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