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

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Message-ID: <20120608134905.GX12795@8bytes.org>
Date:	Fri, 8 Jun 2012 15:49:05 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Bryan Schumaker <bjschuma@...app.com>
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 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.


	Joerg


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