[lustre-devel] [PATCH 4/8] lustre: fld: retry fld rpc even for ESHUTDOWN

From: James Simmons <jsimmons@infradead.org>
To: lustre-devel@lists.lustre.org
Subject: [lustre-devel] [PATCH 4/8] lustre: fld: retry fld rpc even for ESHUTDOWN
Date: Wed, 24 Jul 2019 22:44:03 -0400	[thread overview]
Message-ID: <1564022647-17351-5-git-send-email-jsimmons@infradead.org> (raw)
In-Reply-To: <1564022647-17351-1-git-send-email-jsimmons@infradead.org>

From: wang di <di.wang@intel.com>

when LWP is being evicted, because it is not replayable,
the request might return ESHUTDOWN or EWOULDBLOCK, instead
of failed, which might cause application failure, fld
client will retry RPC, until the connection is being setup
again or the LWP is being closed.

WC-bug-id: https://jira.whamcloud.com/browse/LU-4420
Lustre-commit: d335e310d4bf490509998ddbb1824e38cff20998
Signed-off-by: wang di <di.wang@intel.com>
Reviewed-on: http://review.whamcloud.com/10285
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
---
 fs/lustre/fld/fld_request.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/lustre/fld/fld_request.c b/fs/lustre/fld/fld_request.c
index ec45ea6..ba0ef82 100644
--- a/fs/lustre/fld/fld_request.c
+++ b/fs/lustre/fld/fld_request.c
@@ -367,12 +367,12 @@ 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) {
-			/* For no_delay req(see above), EWOULDBLOCK 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 (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
 			 */
 			ptlrpc_req_finished(req);
 			goto again;
-- 
1.8.3.1
