Re: regression in referrals resolution

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On Mon, Nov 7, 2011 at 9:58 PM, Trond Myklebust
<Trond.Myklebust@xxxxxxxxxx> wrote:
> On Mon, 2011-11-07 at 21:29 +0100, Tigran Mkrtchyan wrote:
>> Hi,
>>
>>
>> today we was running test with referrals and notice that 'current'
>> 3.1+ has a regression.
>> The referrals are resolved, but client returns IO error :
>
> Doh! I expect that the following should fix it...

In did!

Thanks,
   Tigran.
>
> Thanks
>  Trond
> 8<--------------------------------------------------------------------------
> From 91207dc6fd4fbe5f758dd2558e927bcd0c411581 Mon Sep 17 00:00:00 2001
> From: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
> Date: Mon, 7 Nov 2011 15:50:32 -0500
> Subject: [PATCH] NFS: Fix a regression in the referral code
>
> Fix a regression that was introduced by commit
> 0c2e53f11a6dae9e3af5f50f5ad0382e7c3e0cfa (NFS: Remove the unused
> "lookupfh()" version of nfs4_proc_lookup()).
>
> In the case where the lookup gets an NFS4ERR_MOVED, we want to return
> the result of nfs4_get_referral(). Instead, that value is getting
> clobbered by the call to nfs4_handle_exception()...
>
> Reported-by: Tigran Mkrtchyan <tigran.mkrtchyan@xxxxxxx>
> Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
> ---
>  fs/nfs/nfs4proc.c |    3 +--
>  1 files changed, 1 insertions(+), 2 deletions(-)
>
> diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
> index 069cb80..be2bbac 100644
> --- a/fs/nfs/nfs4proc.c
> +++ b/fs/nfs/nfs4proc.c
> @@ -2464,8 +2464,7 @@ static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qst
>                case -NFS4ERR_BADNAME:
>                        return -ENOENT;
>                case -NFS4ERR_MOVED:
> -                       err = nfs4_get_referral(dir, name, fattr, fhandle);
> -                       break;
> +                       return nfs4_get_referral(dir, name, fattr, fhandle);
>                case -NFS4ERR_WRONGSEC:
>                        nfs_fixup_secinfo_attributes(fattr, fhandle);
>                }
> --
> 1.7.7
>
>
> --
> Trond Myklebust
> Linux NFS client maintainer
>
> NetApp
> Trond.Myklebust@xxxxxxxxxx
> www.netapp.com
>
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