1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
5 * Author: Andreas Dilger <adilger@clusterfs.com>
7 * This file is part of the Lustre file system, http://www.lustre.org
8 * Lustre is a trademark of Cluster File Systems, Inc.
10 * You may have signed or agreed to another license before downloading
11 * this software. If so, you are bound by the terms and conditions
12 * of that agreement, and the following does not apply to you. See the
13 * LICENSE file included with this distribution for more information.
15 * If you did not agree to a different license, then this copy of Lustre
16 * is open source software; you can redistribute it and/or modify it
17 * under the terms of version 2 of the GNU General Public License as
18 * published by the Free Software Foundation.
20 * In either case, Lustre is distributed in the hope that it will be
21 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
22 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * license text for more details.
25 * OST<->MDS recovery logging infrastructure.
27 * Invariants in implementation:
28 * - we do not share logs among different OST<->MDS connections, so that
29 * if an OST or MDS fails it need only look at log(s) relevant to itself
32 #define DEBUG_SUBSYSTEM S_LOG
39 #include <libcfs/libcfs.h>
41 #include <liblustre.h>
44 #include <obd_class.h>
45 #include <lustre_log.h>
46 #include <libcfs/list.h>
50 int llog_origin_connect(struct llog_ctxt *ctxt, int count,
51 struct llog_logid *logid, struct llog_gen *gen,
52 struct obd_uuid *uuid)
54 struct llog_gen_rec *lgr;
55 struct ptlrpc_request *req;
56 struct llogd_conn_body *req_body;
60 if (list_empty(&ctxt->loc_handle->u.chd.chd_head)) {
61 CDEBUG(D_HA, "there is no record related to ctxt %p\n", ctxt);
65 /* FIXME what value for gen->conn_cnt */
66 LLOG_GEN_INC(ctxt->loc_gen);
68 /* first add llog_gen_rec */
72 lgr->lgr_hdr.lrh_len = lgr->lgr_tail.lrt_len = sizeof(*lgr);
73 lgr->lgr_hdr.lrh_type = LLOG_GEN_REC;
74 lgr->lgr_gen = ctxt->loc_gen;
75 rc = llog_add(ctxt, &lgr->lgr_hdr, NULL, NULL, 1);
80 LASSERT(ctxt->loc_imp);
81 req = ptlrpc_request_alloc_pack(ctxt->loc_imp, &RQF_LLOG_ORIGIN_CONNECT,
87 req_body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
88 req_body->lgdc_gen = ctxt->loc_gen;
89 req_body->lgdc_logid = ctxt->loc_handle->lgh_id;
90 req_body->lgdc_ctxt_idx = ctxt->loc_idx + 1;
91 ptlrpc_request_set_replen(req);
93 rc = ptlrpc_queue_wait(req);
94 ptlrpc_req_finished(req);
98 EXPORT_SYMBOL(llog_origin_connect);
100 int llog_handle_connect(struct ptlrpc_request *req)
102 struct obd_device *obd = req->rq_export->exp_obd;
103 struct llogd_conn_body *req_body;
104 struct llog_ctxt *ctxt;
108 req_body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_CONN_BODY);
110 ctxt = llog_get_context(obd, req_body->lgdc_ctxt_idx);
111 rc = llog_connect(ctxt, 1, &req_body->lgdc_logid,
112 &req_body->lgdc_gen, NULL);
116 CERROR("failed at llog_relp_connect\n");
120 EXPORT_SYMBOL(llog_handle_connect);
122 int llog_receptor_accept(struct llog_ctxt *ctxt, struct obd_import *imp)
126 LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == imp,
127 "%p - %p\n", ctxt->loc_imp, imp);
131 EXPORT_SYMBOL(llog_receptor_accept);
133 int llog_initiator_connect(struct llog_ctxt *ctxt)
135 struct obd_import *new_imp;
139 new_imp = ctxt->loc_obd->u.cli.cl_import;
140 LASSERTF(ctxt->loc_imp == NULL || ctxt->loc_imp == new_imp,
141 "%p - %p\n", ctxt->loc_imp, new_imp);
142 ctxt->loc_imp = new_imp;
145 EXPORT_SYMBOL(llog_initiator_connect);
147 #else /* !__KERNEL__ */
149 int llog_origin_connect(struct llog_ctxt *ctxt, int count,
150 struct llog_logid *logid, struct llog_gen *gen,
151 struct obd_uuid *uuid)
156 int llog_initiator_connect(struct llog_ctxt *ctxt)