4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/ptlrpc/recover.c
34 * Author: Mike Shaver <shaver@clusterfs.com>
37 #define DEBUG_SUBSYSTEM S_RPC
38 #include <linux/list.h>
39 #include <libcfs/libcfs.h>
40 #include <obd_support.h>
41 #include <lustre_ha.h>
42 #include <lustre_net.h>
43 #include <lustre_import.h>
44 #include <lustre_export.h>
46 #include <obd_class.h>
48 #include "ptlrpc_internal.h"
51 * Start recovery on disconnected import.
52 * This is done by just attempting a connect
54 void ptlrpc_initiate_recovery(struct obd_import *imp)
58 CDEBUG(D_HA, "%s: starting recovery\n", obd2cli_tgt(imp->imp_obd));
59 ptlrpc_connect_import(imp);
65 * Identify what request from replay list needs to be replayed next
66 * (based on what we have already replayed) and send it to server.
68 int ptlrpc_replay_next(struct obd_import *imp, int *inflight)
71 struct ptlrpc_request *req = NULL, *pos;
77 /* It might have committed some after we last spoke, so make sure we
78 * get rid of them now.
80 spin_lock(&imp->imp_lock);
81 imp->imp_last_transno_checked = 0;
82 ptlrpc_free_committed(imp);
83 last_transno = imp->imp_last_replay_transno;
85 CDEBUG(D_HA, "import %p from %s committed %llu last %llu\n",
86 imp, obd2cli_tgt(imp->imp_obd),
87 imp->imp_peer_committed_transno, last_transno);
89 /* Replay all the committed open requests on committed_list first */
90 if (!list_empty(&imp->imp_committed_list)) {
91 req = list_last_entry(&imp->imp_committed_list,
92 struct ptlrpc_request, rq_replay_list);
94 /* The last request on committed_list hasn't been replayed */
95 if (req->rq_transno > last_transno) {
96 if (!imp->imp_resend_replay ||
97 imp->imp_replay_cursor == &imp->imp_committed_list)
98 imp->imp_replay_cursor =
99 imp->imp_replay_cursor->next;
101 while (imp->imp_replay_cursor !=
102 &imp->imp_committed_list) {
103 req = list_entry(imp->imp_replay_cursor,
104 struct ptlrpc_request,
106 if (req->rq_transno > last_transno)
110 LASSERT(!list_empty(imp->imp_replay_cursor));
111 imp->imp_replay_cursor =
112 imp->imp_replay_cursor->next;
115 /* All requests on committed_list have been replayed */
116 imp->imp_replay_cursor = &imp->imp_committed_list;
121 /* All the requests in committed list have been replayed, let's replay
122 * the imp_replay_list */
124 struct ptlrpc_request *tmp;
126 list_for_each_entry_safe(tmp, pos, &imp->imp_replay_list,
128 if (tmp->rq_transno > last_transno) {
135 /* If need to resend the last sent transno (because a reconnect
136 * has occurred), then stop on the matching req and send it again.
137 * If, however, the last sent transno has been committed then we
138 * continue replay from the next request. */
139 if (req != NULL && imp->imp_resend_replay)
140 lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
142 /* ptlrpc_prepare_replay() may fail to add the reqeust into unreplied
143 * list if the request hasn't been added to replay list then. Another
144 * exception is that resend replay could have been removed from the
146 if (req != NULL && list_empty(&req->rq_unreplied_list)) {
147 DEBUG_REQ(D_HA, req, "resend_replay=%d, last_transno=%llu",
148 imp->imp_resend_replay, last_transno);
149 ptlrpc_add_unreplied(req);
150 imp->imp_known_replied_xid = ptlrpc_known_replied_xid(imp);
153 imp->imp_resend_replay = 0;
154 spin_unlock(&imp->imp_lock);
157 LASSERT(!list_empty(&req->rq_unreplied_list));
159 rc = ptlrpc_replay_req(req);
161 CERROR("recovery replay error %d for req %llu\n",
171 * Schedule resending of request on sending_list. This is done after
172 * we completed replaying of requests and locks.
174 int ptlrpc_resend(struct obd_import *imp)
176 struct ptlrpc_request *req, *next;
180 /* As long as we're in recovery, nothing should be added to the sending
181 * list, so we don't need to hold the lock during this iteration and
184 /* Well... what if lctl recover is called twice at the same time?
186 spin_lock(&imp->imp_lock);
187 if (imp->imp_state != LUSTRE_IMP_RECOVER) {
188 spin_unlock(&imp->imp_lock);
192 list_for_each_entry_safe(req, next, &imp->imp_sending_list, rq_list) {
193 LASSERTF((long)req > PAGE_SIZE && req != LP_POISON,
194 "req %p bad\n", req);
195 LASSERTF(req->rq_type != LI_POISON, "req %p freed\n", req);
197 /* If the request is allowed to be sent during replay and it
198 * is not timeout yet, then it does not need to be resent. */
199 if (!ptlrpc_no_resend(req) &&
200 (req->rq_timedout || !req->rq_allow_replay))
201 ptlrpc_resend_req(req);
203 spin_unlock(&imp->imp_lock);
205 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT, 2);
210 * Go through all requests in delayed list and wake their threads
213 void ptlrpc_wake_delayed(struct obd_import *imp)
215 struct ptlrpc_request *req, *pos;
217 spin_lock(&imp->imp_lock);
218 list_for_each_entry_safe(req, pos, &imp->imp_delayed_list, rq_list) {
219 DEBUG_REQ(D_HA, req, "waking (set %p):", req->rq_set);
220 ptlrpc_client_wake_req(req);
222 spin_unlock(&imp->imp_lock);
225 void ptlrpc_request_handle_notconn(struct ptlrpc_request *failed_req)
227 struct obd_import *imp = failed_req->rq_import;
228 int conn = lustre_msg_get_conn_cnt(failed_req->rq_reqmsg);
231 CDEBUG(D_HA, "import %s of %s@%s abruptly disconnected: reconnecting\n",
232 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
233 imp->imp_connection->c_remote_uuid.uuid);
235 if (ptlrpc_set_import_discon(imp, conn, true)) {
236 /* to control recovery via lctl {disable|enable}_recovery */
237 if (imp->imp_deactive == 0)
238 ptlrpc_connect_import(imp);
241 /* Wait for recovery to complete and resend. If evicted, then
242 this request will be errored out later.*/
243 spin_lock(&failed_req->rq_lock);
244 if (!failed_req->rq_no_resend)
245 failed_req->rq_resend = 1;
246 spin_unlock(&failed_req->rq_lock);
252 * Administratively active/deactive a client.
253 * This should only be called by the ioctl interface, currently
254 * - the lctl deactivate and activate commands
255 * - echo 0/1 >> /proc/osc/XXX/active
256 * - client umount -f (ll_umount_begin)
258 int ptlrpc_set_import_active(struct obd_import *imp, int active)
260 struct obd_device *obd = imp->imp_obd;
266 /* When deactivating, mark import invalid, and abort in-flight
269 LCONSOLE_WARN("setting import %s INACTIVE by administrator "
270 "request\n", obd2cli_tgt(imp->imp_obd));
272 /* set before invalidate to avoid messages about imp_inval
273 * set without imp_deactive in ptlrpc_import_delay_req */
274 spin_lock(&imp->imp_lock);
275 imp->imp_deactive = 1;
276 spin_unlock(&imp->imp_lock);
278 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DEACTIVATE);
280 ptlrpc_invalidate_import(imp);
283 /* When activating, mark import valid, and attempt recovery */
285 CDEBUG(D_HA, "setting import %s VALID\n",
286 obd2cli_tgt(imp->imp_obd));
288 spin_lock(&imp->imp_lock);
289 imp->imp_deactive = 0;
290 spin_unlock(&imp->imp_lock);
291 obd_import_event(imp->imp_obd, imp, IMP_EVENT_ACTIVATE);
293 rc = ptlrpc_recover_import(imp, NULL, 0);
298 EXPORT_SYMBOL(ptlrpc_set_import_active);
300 /* Attempt to reconnect an import */
301 int ptlrpc_recover_import(struct obd_import *imp, char *new_uuid, int async)
306 spin_lock(&imp->imp_lock);
307 if (imp->imp_state == LUSTRE_IMP_NEW || imp->imp_deactive ||
308 atomic_read(&imp->imp_inval_count))
310 spin_unlock(&imp->imp_lock);
314 /* force import to be disconnected. */
315 ptlrpc_set_import_discon(imp, 0, false);
318 struct obd_uuid uuid;
320 /* intruct import to use new uuid */
321 obd_str2uuid(&uuid, new_uuid);
322 rc = import_set_conn_priority(imp, &uuid);
327 /* Check if reconnect is already in progress */
328 spin_lock(&imp->imp_lock);
329 if (imp->imp_state != LUSTRE_IMP_DISCON) {
330 imp->imp_force_verify = 1;
333 spin_unlock(&imp->imp_lock);
337 OBD_RACE(OBD_FAIL_PTLRPC_CONNECT_RACE);
339 rc = ptlrpc_connect_import(imp);
344 long timeout = cfs_time_seconds(obd_timeout);
346 CDEBUG(D_HA, "%s: recovery started, waiting %u jiffies\n",
347 obd2cli_tgt(imp->imp_obd), obd_timeout);
349 rc = wait_event_idle_timeout(imp->imp_recovery_waitq,
350 !ptlrpc_import_in_recovery(imp),
356 CDEBUG(D_HA, "%s: recovery finished\n",
357 obd2cli_tgt(imp->imp_obd));
364 EXPORT_SYMBOL(ptlrpc_recover_import);
366 int ptlrpc_import_in_recovery(struct obd_import *imp)
370 spin_lock(&imp->imp_lock);
371 if (imp->imp_state <= LUSTRE_IMP_DISCON ||
372 imp->imp_state >= LUSTRE_IMP_FULL ||
373 imp->imp_obd->obd_no_recov)
375 spin_unlock(&imp->imp_lock);