Received-SPF: pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <20190920112348.69496-1-trond.myklebust@hammerspace.com>
In-Reply-To: <20190920112348.69496-1-trond.myklebust@hammerspace.com>
From:   Olga Kornievskaia <aglo@umich.edu>
Date:   Fri, 20 Sep 2019 17:01:03 -0400
Message-ID: <CAN-5tyGGtASKYC2a+Y01Qr-qBBOT+ybAEokxQdZAyASpEYO+4A@mail.gmail.com>
Subject: Re: [PATCH v3 0/9] Various NFSv4 state error handling fixes
To:     Trond Myklebust <trondmy@gmail.com>
Cc:     Anna Schumaker <Anna.Schumaker@netapp.com>,
        linux-nfs <linux-nfs@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-nfs-owner@vger.kernel.org
Precedence: bulk

Hi Trond,

This version works for me. I went back to v2 and verified that it
didn't work so whatever you did here fixed it for me.

On Fri, Sep 20, 2019 at 7:26 AM Trond Myklebust <trondmy@gmail.com> wrote:
>
> Various NFSv4 fixes to ensure we handle state errors correctly. In
> particular, we need to ensure that for COMPOUNDs like CLOSE and
> DELEGRETURN, that may have an embedded LAYOUTRETURN, we handle the
> layout state errors so that a retry of either the LAYOUTRETURN, or
> the later CLOSE/DELEGRETURN does not corrupt the LAYOUTRETURN
> reply.
>
> Also ensure that if we get a NFS4ERR_OLD_STATEID, then we do our
> best to still try to destroy the state on the server, in order to
> avoid causing state leakage.
>
> v2: Fix bug reports from Olga
>  - Try to avoid sending old stateids on CLOSE/OPEN_DOWNGRADE when
>    doing fully serialised NFSv4.0.
>  - Ensure LOCKU initialises the stateid correctly.
> v3: Fix locking
>  - Ensure the patch "Handle NFS4ERR_OLD_STATEID in LOCKU" locks the
>    stateid when copying it in nfs4_alloc_unlockdata().
>
> Trond Myklebust (9):
>   pNFS: Ensure we do clear the return-on-close layout stateid on fatal
>     errors
>   NFSv4: Clean up pNFS return-on-close error handling
>   NFSv4: Handle NFS4ERR_DELAY correctly in return-on-close
>   NFSv4: Handle RPC level errors in LAYOUTRETURN
>   NFSv4: Add a helper to increment stateid seqids
>   pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state
>     seqid
>   NFSv4: Fix OPEN_DOWNGRADE error handling
>   NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE
>   NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU
>
>  fs/nfs/nfs4_fs.h   |  11 ++-
>  fs/nfs/nfs4proc.c  | 209 +++++++++++++++++++++++++++++++--------------
>  fs/nfs/nfs4state.c |  16 ----
>  fs/nfs/pnfs.c      |  71 +++++++++++++--
>  fs/nfs/pnfs.h      |  17 +++-
>  5 files changed, 233 insertions(+), 91 deletions(-)
>
> --
> 2.21.0
>