[lustre-devel] [PATCH 5/8] lustre: fld: retry fld rpc until the import is closed

From: Andreas Dilger <adilger@whamcloud.com>
To: lustre-devel@lists.lustre.org
Subject: [lustre-devel] [PATCH 5/8] lustre: fld: retry fld rpc until the import is closed
Date: Wed, 14 Aug 2019 16:58:32 +0000	[thread overview]
Message-ID: <321A4238-00F5-43C3-8FD6-D3F7D17146C4@whamcloud.com> (raw)
In-Reply-To: <1564022647-17351-6-git-send-email-jsimmons@infradead.org>

You may as well merge this with the previous patch. 

Cheers, Andreas

> On Jul 24, 2019, at 19:44, James Simmons <jsimmons@infradead.org> wrote:
> 
> From: Wang Di <di.wang@intel.com>
> 
> Since LWP is not replayable, it should retry RPC until
> the import is closed, otherwise it would cause unnecessary
> failure of the application.
> 
> WC-bug-id: https://jira.whamcloud.com/browse/LU-5312
> Lustre-commit: 07d481957c16832c782bb7d0c1fc436bcb148ea6
> Signed-off-by: Wang Di <di.wang@intel.com>
> Reviewed-on: http://review.whamcloud.com/11039
> Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
> Reviewed-by: Fan Yong <fan.yong@intel.com>
> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
> ---
> fs/lustre/fld/fld_request.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/lustre/fld/fld_request.c b/fs/lustre/fld/fld_request.c
> index ba0ef82..60e7105 100644
> --- a/fs/lustre/fld/fld_request.c
> +++ b/fs/lustre/fld/fld_request.c
> @@ -367,12 +367,10 @@ int fld_client_rpc(struct obd_export *exp,
>    rc = ptlrpc_queue_wait(req);
>    obd_put_request_slot(&exp->exp_obd->u.cli);
>    if (rc != 0) {
> -        if (rc == -EWOULDBLOCK || rc == -ESHUTDOWN) {
> -            /* For no_delay req(see above), EWOULDBLOCK and
> -             * ESHUTDOWN means the connection is being evicted,
> -             * but this seq lookup should not return error,
> -             * since it would cause unecessary failure of the
> -             * application, instead it should retry here
> +        if (imp->imp_state != LUSTRE_IMP_CLOSED) {
> +            /* Since LWP is not replayable, so it will keep
> +             * trying unless umount happens, otherwise it would
> +             * cause unecessary failure of the application.
>             */
>            ptlrpc_req_finished(req);
>            goto again;
> -- 
> 1.8.3.1
> 