diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/ptlrpc/llog_net.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/ptlrpc/llog_net.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/ptlrpc/llog_net.c b/drivers/staging/lustre/lustre/ptlrpc/llog_net.c new file mode 100644 index 000000000000..a81f557d7794 --- /dev/null +++ b/drivers/staging/lustre/lustre/ptlrpc/llog_net.c @@ -0,0 +1,75 @@ +/* + * 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 <linux/libcfs/libcfs.h> + +#include <obd_class.h> +#include <lustre_log.h> +#include <linux/list.h> +#include <lvfs.h> +#include <lustre_fsfilt.h> + +int llog_initiator_connect(struct llog_ctxt *ctxt) +{ + struct obd_import *new_imp; + ENTRY; + + 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); |