1/* 2 * GPL HEADER START 3 * 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 only, 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License version 2 for more details (a copy is included 14 * in the LICENSE file that accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License 17 * version 2 along with this program; If not, see 18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf 19 * 20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 21 * CA 95054 USA or visit www.sun.com if you need additional information or 22 * have any questions. 23 * 24 * GPL HEADER END 25 */ 26/* 27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 28 * Use is subject to license terms. 29 * 30 * Copyright (c) 2012, Intel Corporation. 31 */ 32/* 33 * This file is part of Lustre, http://www.lustre.org/ 34 * Lustre is a trademark of Sun Microsystems, Inc. 35 * 36 * lustre/ptlrpc/llog_net.c 37 * 38 * OST<->MDS recovery logging infrastructure. 39 * 40 * Invariants in implementation: 41 * - we do not share logs among different OST<->MDS connections, so that 42 * if an OST or MDS fails it need only look at log(s) relevant to itself 43 * 44 * Author: Andreas Dilger <adilger@clusterfs.com> 45 */ 46 47#define DEBUG_SUBSYSTEM S_LOG 48 49#include "../../include/linux/libcfs/libcfs.h" 50 51#include "../include/obd_class.h" 52#include "../include/lustre_log.h" 53#include <linux/list.h> 54 55int llog_initiator_connect(struct llog_ctxt *ctxt) 56{ 57 struct obd_import *new_imp; 58 59 LASSERT(ctxt); 60 new_imp = ctxt->loc_obd->u.cli.cl_import; 61 LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == new_imp, 62 "%p - %p\n", ctxt->loc_imp, new_imp); 63 mutex_lock(&ctxt->loc_mutex); 64 if (ctxt->loc_imp != new_imp) { 65 if (ctxt->loc_imp) 66 class_import_put(ctxt->loc_imp); 67 ctxt->loc_imp = class_import_get(new_imp); 68 } 69 mutex_unlock(&ctxt->loc_mutex); 70 return 0; 71} 72EXPORT_SYMBOL(llog_initiator_connect); 73