1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ptlrpc/llog_net.c
38 * OST<->MDS recovery logging infrastructure.
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
44 * Author: Andreas Dilger <adilger@clusterfs.com>
47 #define DEBUG_SUBSYSTEM S_LOG
54 #include <libcfs/libcfs.h>
56 #include <liblustre.h>
59 #include <obd_class.h>
60 #include <lustre_log.h>
61 #include <libcfs/list.h>
63 #include <lustre_fsfilt.h>
66 int llog_origin_connect(struct llog_ctxt *ctxt,
67 struct llog_logid *logid, struct llog_gen *gen,
68 struct obd_uuid *uuid)
70 struct llog_gen_rec *lgr;
71 struct ptlrpc_request *req;
72 struct llogd_conn_body *req_body;
73 struct inode* inode = ctxt->loc_handle->lgh_file->f_dentry->d_inode;
79 if (list_empty(&ctxt->loc_handle->u.chd.chd_head)) {
80 CDEBUG(D_HA, "there is no record related to ctxt %p\n", ctxt);
84 /* FIXME what value for gen->conn_cnt */
87 /* first add llog_gen_rec */
91 lgr->lgr_hdr.lrh_len = lgr->lgr_tail.lrt_len = sizeof(*lgr);
92 lgr->lgr_hdr.lrh_type = LLOG_GEN_REC;
94 handle = fsfilt_start_log(ctxt->loc_exp->exp_obd, inode,
95 FSFILT_OP_CANCEL_UNLINK, NULL, 1);
97 CERROR("fsfilt_start failed: %ld\n", PTR_ERR(handle));
98 OBD_FREE(lgr, sizeof(*lgr));
103 lgr->lgr_gen = ctxt->loc_gen;
104 rc = llog_add(ctxt, &lgr->lgr_hdr, NULL, NULL, 1);
106 rc1 = fsfilt_commit(ctxt->loc_exp->exp_obd, inode, handle, 0);
107 if (rc != 1 || rc1 != 0) {
108 rc = (rc != 1) ? rc : rc1;
112 LASSERT(ctxt->loc_imp);
113 req = ptlrpc_request_alloc_pack(ctxt->loc_imp, &RQF_LLOG_ORIGIN_CONNECT,
115 LLOG_ORIGIN_CONNECT);
119 CDEBUG(D_OTHER, "%s mount_count %llu, connection count %llu\n",
120 ctxt->loc_exp->exp_obd->obd_type->typ_name,
121 ctxt->loc_gen.mnt_cnt, ctxt->loc_gen.conn_cnt);
123 req_body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
124 req_body->lgdc_gen = ctxt->loc_gen;
125 req_body->lgdc_logid = ctxt->loc_handle->lgh_id;
126 req_body->lgdc_ctxt_idx = ctxt->loc_idx + 1;
127 ptlrpc_request_set_replen(req);
129 req->rq_no_resend = req->rq_no_delay = 1;
130 rc = ptlrpc_queue_wait(req);
131 ptlrpc_req_finished(req);
135 EXPORT_SYMBOL(llog_origin_connect);
137 int llog_handle_connect(struct ptlrpc_request *req)
139 struct obd_device *obd = req->rq_export->exp_obd;
140 struct llogd_conn_body *req_body;
141 struct llog_ctxt *ctxt;
145 req_body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
147 ctxt = llog_get_context(obd, req_body->lgdc_ctxt_idx);
148 rc = llog_connect(ctxt, &req_body->lgdc_logid,
149 &req_body->lgdc_gen, NULL);
153 CERROR("failed at llog_relp_connect\n");
157 EXPORT_SYMBOL(llog_handle_connect);
159 int llog_receptor_accept(struct llog_ctxt *ctxt, struct obd_import *imp)
164 mutex_down(&ctxt->loc_sem);
165 if (ctxt->loc_imp != imp) {
167 CWARN("changing the import %p - %p\n",
169 class_import_put(ctxt->loc_imp);
171 ctxt->loc_imp = class_import_get(imp);
173 mutex_up(&ctxt->loc_sem);
176 EXPORT_SYMBOL(llog_receptor_accept);
178 #else /* !__KERNEL__ */
180 int llog_origin_connect(struct llog_ctxt *ctxt,
181 struct llog_logid *logid, struct llog_gen *gen,
182 struct obd_uuid *uuid)
188 int llog_initiator_connect(struct llog_ctxt *ctxt)
190 struct obd_import *new_imp;
194 new_imp = ctxt->loc_obd->u.cli.cl_import;
195 LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == new_imp,
196 "%p - %p\n", ctxt->loc_imp, new_imp);
197 mutex_down(&ctxt->loc_sem);
198 if (ctxt->loc_imp != new_imp) {
200 class_import_put(ctxt->loc_imp);
201 ctxt->loc_imp = class_import_get(new_imp);
203 mutex_up(&ctxt->loc_sem);
206 EXPORT_SYMBOL(llog_initiator_connect);