linux-kernel - Re: NFS regression in v3.5-rc1: mount.nfs yells about incorrect mount option

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Message-ID: <4FD21A32.8050400@netapp.com>
Date:	Fri, 08 Jun 2012 11:28:50 -0400
From:	Bryan Schumaker <bjschuma@...app.com>
To:	Joerg Roedel <joro@...tes.org>
CC:	Trond Myklebust <Trond.Myklebust@...app.com>,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: NFS regression in v3.5-rc1: mount.nfs yells about incorrect mount
 option

On 06/08/2012 09:49 AM, Joerg Roedel wrote:
> On Fri, Jun 08, 2012 at 09:37:01AM -0400, Bryan Schumaker wrote:
>> On 06/08/2012 09:33 AM, Joerg Roedel wrote:
> 
>>> Your other patch only touched the nfs4 path, but in my setup nfs3 was in
>>> use. Therefore the patch didn't help. I just figured out that
>>> nfs_fs_mount is shared between nfs23 and nfs4, so the first patch
>>> probably breaks nfs4. I send another one which takes this into account.
>>
>> Would something like this work? (I haven't tried it yet).  Setting it
>> in nfs_alloc_parsed_mount_data() might work too...
>>
>> diff --git a/fs/nfs/super.c b/fs/nfs/super.c
>> index bdd6731..906f09c 100644
>> --- a/fs/nfs/super.c
>> +++ b/fs/nfs/super.c
>> @@ -1867,6 +1867,7 @@ static int nfs23_validate_mount_data(void *options,
>>         if (data == NULL)
>>                 goto out_no_data;
>>  
>> +       args->version = NFS_DEFAULT_VERSION;
>>         switch (data->version) {
>>         case 1:
>>                 data->namlen = 0;
>> --
> 
> Yes, this works too (tested). Doing it in nfs_alloc_parsed_mount_data()
> need to take into account that the function is also called for nfs4.
> This is basically what my second revert-patch does.

Thanks for testing!  The patch I sent you yesterday sets up "args->version = 4" if it gets into the v4 parsing code, so the v4 case should already be taken care of.

- Bryan
> 
> 
> 	Joerg
> 
> 


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