Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / ptlrpc / llog_net.c

diff --git a/kernel/drivers/staging/lustre/lustre/ptlrpc/llog_net.c b/kernel/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
new file mode 100644 (file)
index 0000000..dac66f5
--- /dev/null
+++ b/kernel/drivers/staging/lustre/lustre/ptlrpc/llog_net.c
@@ -0,0 +1,72 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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.
+ *
+ * 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).
+ *
+ * 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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+/*
+ * 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
+
+#include "../../include/linux/libcfs/libcfs.h"
+
+#include "../include/obd_class.h"
+#include "../include/lustre_log.h"
+#include <linux/list.h>
+
+int llog_initiator_connect(struct llog_ctxt *ctxt)
+{
+       struct obd_import *new_imp;
+
+       LASSERT(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);
+       mutex_lock(&ctxt->loc_mutex);
+       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_unlock(&ctxt->loc_mutex);
+       return 0;
+}
+EXPORT_SYMBOL(llog_initiator_connect);