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From: Fred Isaman <iisaman@netapp.com>
To: Benny Halevy <bhalevy@panasas.com>
Cc: linux-nfs@vger.kernel.org
Subject: Re: [PATCH] SQUASHME: pnfs-submit: encode layoutreturn on close before close
Date: Mon, 15 Nov 2010 10:02:00 -0500	[thread overview]
Message-ID: <AANLkTimHPTfZL5DntG3LwzyMRp9UdxH89-C1QKv3dmit@mail.gmail.com> (raw)
In-Reply-To: <1289744517-27949-1-git-send-email-bhalevy@panasas.com>

On Sun, Nov 14, 2010 at 9:21 AM, Benny Halevy <bhalevy@panasas.com> wrote:
> And handle errors from layoutcommit and layoutreturn on the reply path.
>
> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
> ---
>  fs/nfs/nfs4xdr.c |   35 ++++++++++++++++++-----------------
>  fs/nfs/pnfs.c    |    1 +
>  2 files changed, 19 insertions(+), 17 deletions(-)
>
> diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
> index 1804f35..0e6e5e4 100644
> --- a/fs/nfs/nfs4xdr.c
> +++ b/fs/nfs/nfs4xdr.c
> @@ -441,17 +441,17 @@ static int nfs4_stat_to_errno(int);
>  #define NFS4_enc_close_sz      (compound_encode_hdr_maxsz + \
>                                 encode_sequence_maxsz + \
>                                 encode_putfh_maxsz + \
> -                                encode_close_maxsz + \
> -                                encode_getattr_maxsz + \
> +                                encode_layoutcommit_maxsz + \
>                                 encode_layoutreturn_maxsz + \
> -                                encode_layoutcommit_maxsz)
> +                                encode_close_maxsz + \
> +                                encode_getattr_maxsz)
>  #define NFS4_dec_close_sz      (compound_decode_hdr_maxsz + \
>                                 decode_sequence_maxsz + \
>                                 decode_putfh_maxsz + \
> -                                decode_close_maxsz + \
> -                                decode_getattr_maxsz + \
> +                                decode_layoutcommit_maxsz + \
>                                 decode_layoutreturn_maxsz + \
> -                                decode_layoutcommit_maxsz)
> +                                decode_close_maxsz + \
> +                                decode_getattr_maxsz)
>  #define NFS4_enc_setattr_sz    (compound_encode_hdr_maxsz + \
>                                 encode_sequence_maxsz + \
>                                 encode_putfh_maxsz + \
> @@ -2160,10 +2160,10 @@ static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closea
>        encode_putfh(&xdr, args->fh, &hdr);
>        if (args->op_bitmask & NFS4_HAS_LAYOUTCOMMIT) /* layoutcommit set */
>                encode_layoutcommit(&xdr, &args->lc_args, &hdr);
> -       encode_close(&xdr, args, &hdr);
> -       encode_getfattr(&xdr, args->bitmask, &hdr);
>        if (args->op_bitmask & NFS4_HAS_LAYOUTRETURN) /* layoutreturn set */
>                encode_layoutreturn(&xdr, &args->lr_args, &hdr);
> +       encode_close(&xdr, args, &hdr);
> +       encode_getfattr(&xdr, args->bitmask, &hdr);
>        encode_nops(&hdr);
>        return 0;
>  }
> @@ -5743,9 +5743,16 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_clos
>        status = decode_putfh(&xdr);
>        if (status)
>                goto out;
> -       /* We pay no attention to the layoutcommit return */
> -       if (res->op_bitmask & NFS4_HAS_LAYOUTCOMMIT)
> -               decode_layoutcommit(&xdr);
> +       if (res->op_bitmask & NFS4_HAS_LAYOUTCOMMIT) {
> +               status = decode_layoutcommit(&xdr);
> +               if (status)
> +                       goto out;
> +       }
> +       if (res->op_bitmask & NFS4_HAS_LAYOUTRETURN) {
> +               status = decode_layoutreturn(&xdr, &res->lr_res);
> +               if (status)
> +                       goto out;

What prevents infinite loop here?  With LAYOUTCOMMIT, the inode data
is cleared so that on retry it will not be called.  I see no
comparable "pre-cleaning" done for LAYOUTRETURN.

Fred

> +       }
>        status = decode_close(&xdr, res);
>        if (status != 0)
>                goto out;
> @@ -5757,12 +5764,6 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_clos
>         */
>        decode_getfattr(&xdr, res->fattr, res->server,
>                        !RPC_IS_ASYNC(rqstp->rq_task));
> -       /*
> -        * With the forgetful model, we pay no attention to the
> -        * layoutreturn status.
> -        */
> -       if (res->op_bitmask & NFS4_HAS_LAYOUTRETURN)
> -               decode_layoutreturn(&xdr, &res->lr_res);
>  out:
>        return status;
>  }
> diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
> index 15673d0..90a868b 100644
> --- a/fs/nfs/pnfs.c
> +++ b/fs/nfs/pnfs.c
> @@ -640,6 +640,7 @@ pnfs_roc(struct nfs4_closedata *data)
>        LIST_HEAD(tmp_list);
>        bool found = false;
>
> +       data->arg.op_bitmask = data->res.op_bitmask = 0;
>        spin_lock(&data->inode->i_lock);
>        lo = NFS_I(data->inode)->layout;
>        if (!lo || lo->roc_iomode == 0 ||
> --
> 1.7.2.3
>
> --
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>

  parent reply	other threads:[~2010-11-15 15:02 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-12  8:48 [PATCH 00/22] rewrite of CB_LAYOUTRECALL and layoutstate code, try 2 Fred Isaman
2010-11-12  8:48 ` [PATCH 01/22] pnfs-submit: remove RPC_ASSASSINATED(task) checks Fred Isaman
2010-11-12  8:48 ` [PATCH 02/22] pnfs-submit: remove unnecessary field lgp->status Fred Isaman
2010-11-12  8:48 ` [PATCH 03/22] pnfs-submit: layoutreturn's rpc_call_op functions need to handle bulk returns Fred Isaman
2010-11-12  8:48 ` [PATCH 04/22] pnfs-submit: argument to should_free_lseg changed from lseg to range Fred Isaman
2010-11-12  8:48 ` [PATCH 05/22] pnfs-submit: change layout state seqlock to a spinlock Fred Isaman
2010-11-12  8:48 ` [PATCH 06/22] NFSv4.1: Callback share session between ops Fred Isaman
2010-11-12  8:48 ` [PATCH 07/22] SQUASHME: pnfs-submit: fixups for nfsv4.1 callbacks Fred Isaman
2010-11-12  8:48 ` [PATCH 08/22] SQUASHME: allow cb_sequence changes to compile without v4.1 Fred Isaman
2010-11-14 12:05   ` Benny Halevy
2010-11-15 15:07     ` Fred Isaman
2010-11-12  8:48 ` [PATCH 09/22] pnfs-submit: change pnfs_layout_segment refcounting from kref to atomic_t Fred Isaman
2010-11-12  8:48 ` [PATCH 10/22] pnfs-submit: Have LAYOUTGETS wait when lo->plh_block_lgets is set Fred Isaman
2010-11-12  8:48 ` [PATCH 11/22] pnfs-submit: remove _pnfs_can_return_lseg call from pnfs_clear_lseg_list Fred Isaman
2010-11-12  8:48 ` [PATCH 12/22] pnfs_submit: nfs4_layoutreturn_release should not reference results Fred Isaman
2010-11-12  8:48 ` [PATCH 13/22] pnfs-submit: reorganize struct cb_layoutrecallargs Fred Isaman
2010-11-12  8:48 ` [PATCH 14/22] pnfs-submit: rename lo->state to lo->plh_flags Fred Isaman
2010-11-12  8:48 ` [PATCH 15/22] pnfs-submit: change pnfs_layout_hdr refcount to atomic_t Fred Isaman
2010-11-12  8:48 ` [PATCH 16/22] pnfs-submit: rewrite of layout state handling and cb_layoutrecall Fred Isaman
2010-11-13  9:11   ` Trond Myklebust
2010-11-14 11:44     ` Benny Halevy
2010-11-14 11:50       ` Benny Halevy
2010-11-15 14:28         ` Fred Isaman
2010-11-14 15:43   ` Benny Halevy
2010-11-15 14:51     ` Fred Isaman
2010-11-15 16:17       ` Benny Halevy
2010-11-15 17:53         ` [nfsv4] " Fred Isaman
2010-11-15 19:19           ` Boaz Harrosh
2010-11-15 20:40             ` Fred Isaman
2010-11-16  9:54               ` Boaz Harrosh
2010-11-16 11:12                 ` Boaz Harrosh
2010-11-17 17:53           ` Benny Halevy
2010-11-12  8:48 ` [PATCH 17/22] pnfs-submit: increase number of outstanding CB_LAYOUTRECALLS we can handle Fred Isaman
2010-11-12  8:48 ` [PATCH 18/22] pnfs-submit: roc add layoutreturn op to close compound Fred Isaman
2010-11-12 16:31   ` Benny Halevy
2010-11-12 16:56     ` Fred Isaman
2010-11-14 10:54       ` Benny Halevy
2010-11-14 14:21       ` [PATCH] SQUASHME: pnfs-submit: encode layoutreturn on close before close Benny Halevy
2010-11-14 18:12         ` [PATCH 2/2] pnfs-submit: handle NFS4ERR_DELEG_REVOKED for LAYOUTRETURN Benny Halevy
2010-11-15 12:54           ` [PATCH 2/2 v2] " Benny Halevy
2010-11-15 15:02         ` Fred Isaman [this message]
2010-11-15 15:34           ` [PATCH] SQUASHME: pnfs-submit: encode layoutreturn on close before close Benny Halevy
2010-11-12  8:48 ` [PATCH 19/22] pnfs-submit refactor layoutcommit xdr structures Fred Isaman
2010-11-12  8:48 ` [PATCH 20/22] pnfs-submit refactor pnfs_layoutcommit_setup Fred Isaman
2010-11-12  8:48 ` [PATCH 21/22] pnfs_submit: roc add layoutcommit op to close compound Fred Isaman
2010-11-12  8:48 ` [PATCH 22/22] SQUASHME: make roc patches compile without v4.1 Fred Isaman

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