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
41 #include <liblustre.h>
44 #include <linux/obd_class.h>
45 #include <linux/lustre_log.h>
46 #include <libcfs/list.h>
47 #include <linux/lvfs.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 obd_import *imp;
56 struct ptlrpc_request *request;
57 struct llogd_conn_body *req_body;
58 int size = sizeof(struct llogd_conn_body);
62 if (list_empty(&ctxt->loc_handle->u.chd.chd_head)) {
63 CDEBUG(D_HA, "there is no record related to ctxt %p\n", ctxt);
67 /* FIXME what value for gen->conn_cnt */
68 LLOG_GEN_INC(ctxt->loc_gen);
70 /* first add llog_gen_rec */
71 OBD_ALLOC(lgr, sizeof(*lgr));
74 lgr->lgr_hdr.lrh_len = lgr->lgr_tail.lrt_len = sizeof(*lgr);
75 lgr->lgr_hdr.lrh_type = LLOG_GEN_REC;
76 lgr->lgr_gen = ctxt->loc_gen;
77 rc = llog_add(ctxt, &lgr->lgr_hdr, NULL, NULL, 1);
78 OBD_FREE(lgr, sizeof(*lgr));
82 LASSERT(ctxt->loc_imp);
85 request = ptlrpc_prep_req(imp, LUSTRE_LOG_VERSION,
86 LLOG_ORIGIN_CONNECT, 1, &size, NULL);
90 req_body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof(*req_body));
92 req_body->lgdc_gen = ctxt->loc_gen;
93 req_body->lgdc_logid = ctxt->loc_handle->lgh_id;
94 req_body->lgdc_ctxt_idx = ctxt->loc_idx + 1;
95 request->rq_replen = lustre_msg_size(0, NULL);
97 rc = ptlrpc_queue_wait(request);
98 ptlrpc_req_finished(request);
102 EXPORT_SYMBOL(llog_origin_connect);
104 int llog_handle_connect(struct ptlrpc_request *req)
106 struct obd_device *obd = req->rq_export->exp_obd;
107 struct llogd_conn_body *req_body;
108 struct llog_ctxt *ctxt;
112 req_body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*req_body));
114 ctxt = llog_get_context(obd, req_body->lgdc_ctxt_idx);
115 rc = llog_connect(ctxt, 1, &req_body->lgdc_logid,
116 &req_body->lgdc_gen, NULL);
118 CERROR("failed at llog_relp_connect\n");
122 EXPORT_SYMBOL(llog_handle_connect);
124 int llog_receptor_accept(struct llog_ctxt *ctxt, struct obd_import *imp)
131 EXPORT_SYMBOL(llog_receptor_accept);
133 int llog_initiator_connect(struct llog_ctxt *ctxt)
137 ctxt->loc_imp = ctxt->loc_obd->u.cli.cl_import;
140 EXPORT_SYMBOL(llog_initiator_connect);
142 #else /* !__KERNEL__ */
144 int llog_origin_connect(struct llog_ctxt *ctxt, int count,
145 struct llog_logid *logid, struct llog_gen *gen,
146 struct obd_uuid *uuid)
151 int llog_initiator_connect(struct llog_ctxt *ctxt)