1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Portal-RPC reconnection and replay operations, for use in recovery.
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * Copryright (C) 1996 Peter J. Braam <braam@stelias.com>
10 * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
11 * Copryright (C) 1999 Seagate Technology Inc.
12 * Copryright (C) 2001 Mountain View Data, Inc.
13 * Copryright (C) 2002 Cluster File Systems, Inc.
17 #include <linux/config.h>
18 #include <linux/module.h>
19 #include <linux/kmod.h>
21 #define DEBUG_SUBSYSTEM S_RPC
23 #include <linux/lustre_ha.h>
24 #include <linux/lustre_net.h>
25 #include <linux/obd.h>
27 int ptlrpc_reconnect_import(struct obd_import *imp, int rq_opc)
29 struct obd_device *obd = imp->imp_obd;
30 struct client_obd *cli = &obd->u.cli;
31 int size[] = { sizeof(cli->cl_target_uuid), sizeof(obd->obd_uuid) };
32 char *tmp[] = {cli->cl_target_uuid, obd->obd_uuid };
33 struct ptlrpc_connection *conn = imp->imp_connection;
34 struct lustre_handle old_hdl;
35 struct ptlrpc_request *request;
36 struct obd_export *ldlmexp;
39 request = ptlrpc_prep_req(imp, rq_opc, 2, size, tmp);
40 request->rq_level = LUSTRE_CONN_NEW;
41 request->rq_replen = lustre_msg_size(0, NULL);
44 * This address is the export that represents our client-side LDLM
45 * service (for ASTs). We should only have one on this list, so we
46 * just grab the first one.
48 * XXX tear down export, call class_obd_connect?
50 ldlmexp = list_entry(obd->obd_exports.next, struct obd_export,
52 request->rq_reqmsg->addr = (__u64)(unsigned long)ldlmexp;
53 request->rq_reqmsg->cookie = ldlmexp->exp_cookie;
54 rc = ptlrpc_queue_wait(request);
55 rc = ptlrpc_check_status(request, rc);
57 CERROR("cannot connect to %s@%s: rc = %d\n",
58 cli->cl_target_uuid, conn->c_remote_uuid, rc);
59 ptlrpc_free_req(request);
60 GOTO(out_disc, rc = -ENOTCONN);
63 old_hdl = imp->imp_handle;
64 imp->imp_handle.addr = request->rq_repmsg->addr;
65 imp->imp_handle.cookie = request->rq_repmsg->cookie;
66 CERROR("reconnected to %s@%s (%Lx/%Lx, was %Lx/%Lx)!\n",
67 cli->cl_target_uuid, conn->c_remote_uuid,
68 imp->imp_handle.addr, imp->imp_handle.cookie,
69 old_hdl.addr, old_hdl.cookie);
70 ptlrpc_req_finished(request);
76 int ptlrpc_run_recovery_upcall(struct ptlrpc_connection *conn)
83 conn->c_level = LUSTRE_CONN_RECOVD;
85 argv[0] = obd_recovery_upcall;
86 argv[1] = conn->c_remote_uuid;
90 envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
93 rc = call_usermodehelper(argv[0], argv, envp);
95 CERROR("Error invoking recovery upcall %s for %s: %d\n",
96 argv[0], argv[1], rc);
97 CERROR("Check /proc/sys/lustre/recovery_upcall?\n");
99 CERROR("Invoked upcall %s for connection %s\n",
104 * We don't want to make this a "failed" recovery, because the system
105 * administrator -- or, perhaps, tester -- may well be able to rescue
106 * things by running the correct upcall.
111 int ptlrpc_replay(struct ptlrpc_connection *conn)
114 struct list_head *tmp, *pos;
115 struct ptlrpc_request *req;
118 spin_lock(&conn->c_lock);
120 CDEBUG(D_HA, "connection %p to %s has last_xid "LPD64"\n",
121 conn, conn->c_remote_uuid, conn->c_last_xid);
123 list_for_each_safe(tmp, pos, &conn->c_sending_head) {
124 req = list_entry(tmp, struct ptlrpc_request, rq_list);
126 /* replay what needs to be replayed */
127 if (req->rq_flags & PTL_RPC_FL_REPLAY) {
128 CDEBUG(D_HA, "FL_REPLAY: xid "LPD64" transno "LPD64" op %d @ %d\n",
129 req->rq_xid, req->rq_repmsg->transno, req->rq_reqmsg->opc,
130 req->rq_import->imp_client->cli_request_portal);
131 rc = ptlrpc_replay_req(req);
133 #error We should not hold a spinlock over such a lengthy operation.
134 #error If necessary, drop spinlock, do operation, re-get spinlock, restart loop.
135 #error If we need to avoid re-processint items, then delete them from the list
136 #error as they are replayed and re-add at the tail of this list, so the next
137 #error item to process will always be at the head of the list.
140 CERROR("recovery replay error %d for req %Ld\n",
146 /* server has seen req, we have reply: skip */
147 if ((req->rq_flags & PTL_RPC_FL_REPLIED) &&
148 req->rq_xid <= conn->c_last_xid) {
149 CDEBUG(D_HA, "REPLIED SKIP: xid "LPD64" transno "
150 LPD64" op %d @ %d\n",
151 req->rq_xid, req->rq_repmsg->transno,
153 req->rq_import->imp_client->cli_request_portal);
157 /* server has lost req, we have reply: resend, ign reply */
158 if ((req->rq_flags & PTL_RPC_FL_REPLIED) &&
159 req->rq_xid > conn->c_last_xid) {
160 CDEBUG(D_HA, "REPLIED RESEND: xid "LPD64" transno "
161 LPD64" op %d @ %d\n",
162 req->rq_xid, req->rq_repmsg->transno,
164 req->rq_import->imp_client->cli_request_portal);
165 rc = ptlrpc_replay_req(req);
167 CERROR("request resend error %d for req %Ld\n",
173 /* server has seen req, we have lost reply: -ERESTARTSYS */
174 if ( !(req->rq_flags & PTL_RPC_FL_REPLIED) &&
175 req->rq_xid <= conn->c_last_xid) {
176 CDEBUG(D_HA, "RESTARTSYS: xid "LPD64" op %d @ %d\n",
177 req->rq_xid, req->rq_reqmsg->opc,
178 req->rq_import->imp_client->cli_request_portal);
179 ptlrpc_restart_req(req);
182 /* service has not seen req, no reply: resend */
183 if ( !(req->rq_flags & PTL_RPC_FL_REPLIED) &&
184 req->rq_xid > conn->c_last_xid) {
185 CDEBUG(D_HA, "RESEND: xid "LPD64" transno "LPD64
186 " op %d @ %d\n", req->rq_xid,
187 req->rq_repmsg ? req->rq_repmsg->transno : 0,
189 req->rq_import->imp_client->cli_request_portal);
190 ptlrpc_resend_req(req);
195 conn->c_level = LUSTRE_CONN_FULL;
196 recovd_conn_fixed(conn);
198 CERROR("recovery complete on conn %p(%s), waking delayed reqs\n",
199 conn, conn->c_remote_uuid);
200 /* Finally, continue what we delayed since recovery started */
201 list_for_each_safe(tmp, pos, &conn->c_delayed_head) {
202 req = list_entry(tmp, struct ptlrpc_request, rq_list);
203 ptlrpc_continue_req(req);
208 spin_unlock(&conn->c_lock);