b=17750

[fs/lustre-release.git] / lustre / ptlrpc / llog_net.c

diff --git a/lustre/ptlrpc/llog_net.c b/lustre/ptlrpc/llog_net.c
index a1c54fc..79d2f03 100644 (file)
--- a/lustre/ptlrpc/llog_net.c
+++ b/lustre/ptlrpc/llog_net.c
@@ -1,32 +1,47 @@
 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
  * vim:expandtab:shiftwidth=8:tabstop=8:
  *
- *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
- *   Author: Andreas Dilger <adilger@clusterfs.com>
+ * GPL HEADER START
  *
- *   This file is part of the Lustre file system, http://www.lustre.org
- *   Lustre is a trademark of Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   You may have signed or agreed to another license before downloading
- *   this software.  If so, you are bound by the terms and conditions
- *   of that agreement, and the following does not apply to you.  See the
- *   LICENSE file included with this distribution for more information.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
  *
- *   If you did not agree to a different license, then this copy of Lustre
- *   is open source software; you can redistribute it and/or modify it
- *   under the terms of version 2 of the GNU General Public License as
- *   published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
  *
- *   In either case, Lustre is distributed in the hope that it will be
- *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   license text for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ptlrpc/llog_net.c
  *
  * OST<->MDS recovery logging infrastructure.
  *
  * Invariants in implementation:
  * - we do not share logs among different OST<->MDS connections, so that
  *   if an OST or MDS fails it need only look at log(s) relevant to itself
+ *
+ * Author: Andreas Dilger <adilger@clusterfs.com>
  */
 
 #define DEBUG_SUBSYSTEM S_LOG
@@ -47,7 +62,7 @@
 #include <lvfs.h>
 
 #ifdef __KERNEL__
-int llog_origin_connect(struct llog_ctxt *ctxt, int count,
+int llog_origin_connect(struct llog_ctxt *ctxt,
                         struct llog_logid *logid, struct llog_gen *gen,
                         struct obd_uuid *uuid)
 {
@@ -108,7 +123,7 @@ int llog_handle_connect(struct ptlrpc_request *req)
         req_body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
 
         ctxt = llog_get_context(obd, req_body->lgdc_ctxt_idx);
-        rc = llog_connect(ctxt, 1, &req_body->lgdc_logid,
+        rc = llog_connect(ctxt, &req_body->lgdc_logid,
                           &req_body->lgdc_gen, NULL);
 
         llog_ctxt_put(ctxt);
@@ -122,14 +137,32 @@ EXPORT_SYMBOL(llog_handle_connect);
 int llog_receptor_accept(struct llog_ctxt *ctxt, struct obd_import *imp)
 {
         ENTRY;
+
         LASSERT(ctxt);
-        LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == imp,
-                 "%p - %p\n", ctxt->loc_imp, imp);
-        ctxt->loc_imp = imp;
+        mutex_down(&ctxt->loc_sem);
+        if (ctxt->loc_imp != imp) {
+                if (ctxt->loc_imp) {
+                        CWARN("changing the import %p - %p\n",
+                              ctxt->loc_imp, imp);
+                        class_import_put(ctxt->loc_imp);
+                }
+                ctxt->loc_imp = class_import_get(imp);
+        }
+        mutex_up(&ctxt->loc_sem);
         RETURN(0);
 }
 EXPORT_SYMBOL(llog_receptor_accept);
 
+#else /* !__KERNEL__ */
+
+int llog_origin_connect(struct llog_ctxt *ctxt,
+                        struct llog_logid *logid, struct llog_gen *gen,
+                        struct obd_uuid *uuid)
+{
+        return 0;
+}
+#endif
+
 int llog_initiator_connect(struct llog_ctxt *ctxt)
 {
         struct obd_import *new_imp;
@@ -139,22 +172,13 @@ int llog_initiator_connect(struct llog_ctxt *ctxt)
         new_imp = ctxt->loc_obd->u.cli.cl_import;
         LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == new_imp,
                  "%p - %p\n", ctxt->loc_imp, new_imp);
-        ctxt->loc_imp = new_imp;
+        mutex_down(&ctxt->loc_sem);
+        if (ctxt->loc_imp != new_imp) {
+                if (ctxt->loc_imp)
+                        class_import_put(ctxt->loc_imp);
+                ctxt->loc_imp = class_import_get(new_imp);
+        }
+        mutex_up(&ctxt->loc_sem);
         RETURN(0);
 }
 EXPORT_SYMBOL(llog_initiator_connect);
-
-#else /* !__KERNEL__ */
-
-int llog_origin_connect(struct llog_ctxt *ctxt, int count,
-                        struct llog_logid *logid, struct llog_gen *gen,
-                        struct obd_uuid *uuid)
-{
-        return 0;
-}
-
-int llog_initiator_connect(struct llog_ctxt *ctxt)
-{
-        return 0;
-}
-#endif