From: Bryan Schumaker <bjschuma@netapp.com>
Subject: Re: [REGRESSION] 8f70e95f9f4159184f557 causes mount failure with
 EGAIN
Date: Thu, 31 Mar 2011 13:17:16 -0400
Message-ID: <4D94B71C.4010902@netapp.com>
References: <1301513561.561.7.camel@unknown001a4b0c2895>	 <4D939CAF.40506@netapp.com>  <1301520805.561.11.camel@unknown001a4b0c2895> <1301535117.561.16.camel@unknown001a4b0c2895>
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Cc: linux-nfs@vger.kernel.org, Trond.Myklebust@netapp.com
To: Eric Paris <eparis@redhat.com>
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On 03/30/2011 09:31 PM, Eric Paris wrote:
> On Wed, 2011-03-30 at 17:33 -0400, Eric Paris wrote:
>> On Wed, 2011-03-30 at 17:12 -0400, Bryan Schumaker wrote:
>>> On 03/30/2011 03:32 PM, Eric Paris wrote:
>>>> $ git bisect good
>>>> 8f70e95f9f4159184f557a1db60c909d7c1bd2e3 is the first bad commit
>>>> commit 8f70e95f9f4159184f557a1db60c909d7c1bd2e3
>>>> Author: Bryan Schumaker <bjschuma@netapp.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@netapp.com>
>>>>     Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
>>>>
>>>> Using a linux-next kernel for the last 2 days I have been unable to
>>>> mount exports from my RHEL6 server.  mount(2) returned EAGAIN.  Turned
>>>
>>> Thanks for letting me know.  What does your exports file look like?
>>
>> # cat /etc/exports
>> /		127.0.0.1(fsid=0)
>> /export		*(rw,fsid=1,all_squash,anonuid=500,anongid=500)
> 
> At jlayton's suggestion I changed /exports to not include the /
> 127.0.0.1 and removed both explicit fsid= and it works.  So this patch
> broke my setup, but I have a workaround.   (I'm pretty sure the
> previous / 127 entry was a workaround for a problem when all my clients
> broke during Fedora's switch to use NFSv4 default.  Funny one workaround
> comes back to bit me again  :))
> 
> Thanks! 

Thanks for letting me know.

Bryan

> 
> 
>> The client fstab looks like:
>> paris.rdu.redhat.com:/export/ /storage nfs tcp,noatime,nodiratime,noauto,users,exec,suid 0 0
>>
>>>
>>> Bryan
>>>
>>>> up debugging (thanks jlayton) and got:
>>>>
>>>>         [ 1732.795056] NFS: nfs mount opts='tcp,vers=4,addr=10.11.231.241,clientaddr=10.11.231.191'
>>>>         [ 1732.798079] NFS:   parsing nfs mount option 'tcp'
>>>>         [ 1732.800210] NFS:   parsing nfs mount option 'vers=4'
>>>>         [ 1732.802324] NFS:   parsing nfs mount option 'addr=10.11.231.241'
>>>>         [ 1732.804477] NFS:   parsing nfs mount option 'clientaddr=10.11.231.191'
>>>>         [ 1732.805790] NFS: MNTPATH: '/export/'
>>>>         [ 1732.806663] --> nfs4_try_mount()
>>>>         [ 1732.807459] --> nfs4_create_server()
>>>>         [ 1732.808301] --> nfs4_init_server()
>>>>         [ 1732.809136] --> nfs4_set_client()
>>>>         [ 1732.809898] --> nfs_get_client(paris.rdu.redhat.com,v4)
>>>>         [ 1732.811122] NFS: get client cookie (0xffff880039cfd9e8/0xffff88003b889000)
>>>>         [ 1732.813771] NFS: Callback listener port = 36700 (af 2)
>>>>         [ 1732.814931] NFS: Callback listener port = 60202 (af 10)
>>>>         [ 1732.816199] --> nfs_get_client() = ffff880039cfd9e8 [new]
>>>>         [ 1732.817356] <-- nfs4_set_client() = 0 [new ffff880039cfd9e8]
>>>>         [ 1732.818587] <-- nfs4_init_server() = 0
>>>>         [ 1732.819476] --> nfs4_get_rootfh()
>>>>         [ 1732.820282] encode_compound: tag=
>>>>         [ 1732.822070] encode_compound: tag=
>>>>         [ 1732.822937] nfs4_get_rootfh: getroot error = 11
>>>>         [ 1732.823982] <-- nfs4_get_rootfh() = -11
>>>>         [ 1732.824880] --> nfs_free_server()
>>>>         [ 1732.846219] --> nfs_put_client({1})
>>>>         [ 1732.847888] --> nfs_free_client(4)
>>>>         [ 1732.850236] NFS: releasing client cookie (0xffff880039cfd9e8/0xffff88003b889000)
>>>>         [ 1732.853726] <-- nfs_free_client()
>>>>         [ 1732.854505] <-- nfs_free_server()
>>>>         [ 1732.855274] <-- nfs4_create_server() = error -11
>>>>         [ 1732.856187] <-- nfs4_try_mount() = -11 [error]
>>>>
>>>> Bisected and got the commit listed above.
>>>>
>>>
>>
> 
>