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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ptlrpc/pinger.c
38 * Portal-RPC reconnection and replay operations, for use in recovery.
42 #include <liblustre.h>
44 #define DEBUG_SUBSYSTEM S_RPC
47 #include <obd_support.h>
48 #include <obd_class.h>
49 #include "ptlrpc_internal.h"
51 struct mutex pinger_mutex;
52 static CFS_LIST_HEAD(pinger_imports);
53 static cfs_list_t timeout_list = CFS_LIST_HEAD_INIT(timeout_list);
54 struct ptlrpc_request *
55 ptlrpc_prep_ping(struct obd_import *imp)
57 struct ptlrpc_request *req;
59 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING,
60 LUSTRE_OBD_VERSION, OBD_PING);
62 ptlrpc_request_set_replen(req);
63 req->rq_no_resend = req->rq_no_delay = 1;
68 int ptlrpc_obd_ping(struct obd_device *obd)
71 struct ptlrpc_request *req;
74 req = ptlrpc_prep_ping(obd->u.cli.cl_import);
78 req->rq_send_state = LUSTRE_IMP_FULL;
80 rc = ptlrpc_queue_wait(req);
82 ptlrpc_req_finished(req);
86 EXPORT_SYMBOL(ptlrpc_obd_ping);
88 int ptlrpc_ping(struct obd_import *imp)
90 struct ptlrpc_request *req;
93 req = ptlrpc_prep_ping(imp);
95 CERROR("OOM trying to ping %s->%s\n",
96 imp->imp_obd->obd_uuid.uuid,
97 obd2cli_tgt(imp->imp_obd));
101 DEBUG_REQ(D_INFO, req, "pinging %s->%s",
102 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
103 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
108 void ptlrpc_update_next_ping(struct obd_import *imp, int soon)
111 int time = soon ? PING_INTERVAL_SHORT : PING_INTERVAL;
112 if (imp->imp_state == LUSTRE_IMP_DISCON) {
113 int dtime = max_t(int, CONNECTION_SWITCH_MIN,
115 at_get(&imp->imp_at.iat_net_latency));
116 time = min(time, dtime);
118 imp->imp_next_ping = cfs_time_shift(time);
119 #endif /* ENABLE_PINGER */
122 void ptlrpc_ping_import_soon(struct obd_import *imp)
124 imp->imp_next_ping = cfs_time_current();
127 static inline int imp_is_deactive(struct obd_import *imp)
129 return (imp->imp_deactive ||
130 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_IMP_DEACTIVE));
133 static inline int ptlrpc_next_reconnect(struct obd_import *imp)
135 if (imp->imp_server_timeout)
136 return cfs_time_shift(obd_timeout / 2);
138 return cfs_time_shift(obd_timeout);
141 static cfs_atomic_t suspend_timeouts = CFS_ATOMIC_INIT(0);
142 static cfs_time_t suspend_wakeup_time = 0;
144 cfs_duration_t pinger_check_timeout(cfs_time_t time)
146 struct timeout_item *item;
147 cfs_time_t timeout = PING_INTERVAL;
149 /* The timeout list is a increase order sorted list */
150 mutex_lock(&pinger_mutex);
151 cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
152 int ti_timeout = item->ti_timeout;
153 if (timeout > ti_timeout)
154 timeout = ti_timeout;
157 mutex_unlock(&pinger_mutex);
159 return cfs_time_sub(cfs_time_add(time, cfs_time_seconds(timeout)),
163 static cfs_waitq_t suspend_timeouts_waitq;
165 cfs_time_t ptlrpc_suspend_wakeup_time(void)
167 return suspend_wakeup_time;
170 void ptlrpc_deactivate_timeouts(struct obd_import *imp)
172 /*XXX: disabled for now, will be replaced by adaptive timeouts */
174 if (imp->imp_no_timeout)
176 imp->imp_no_timeout = 1;
177 cfs_atomic_inc(&suspend_timeouts);
178 CDEBUG(D_HA|D_WARNING, "deactivate timeouts %u\n",
179 cfs_atomic_read(&suspend_timeouts));
183 void ptlrpc_activate_timeouts(struct obd_import *imp)
185 /*XXX: disabled for now, will be replaced by adaptive timeouts */
187 if (!imp->imp_no_timeout)
189 imp->imp_no_timeout = 0;
190 LASSERT(cfs_atomic_read(&suspend_timeouts) > 0);
191 if (cfs_atomic_dec_and_test(&suspend_timeouts)) {
192 suspend_wakeup_time = cfs_time_current();
193 cfs_waitq_signal(&suspend_timeouts_waitq);
195 CDEBUG(D_HA|D_WARNING, "activate timeouts %u\n",
196 cfs_atomic_read(&suspend_timeouts));
200 int ptlrpc_check_suspend(void)
202 if (cfs_atomic_read(&suspend_timeouts))
207 int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req)
209 struct l_wait_info lwi;
211 if (cfs_atomic_read(&suspend_timeouts)) {
212 DEBUG_REQ(D_NET, req, "-- suspend %d regular timeout",
213 cfs_atomic_read(&suspend_timeouts));
214 lwi = LWI_INTR(NULL, NULL);
215 l_wait_event(suspend_timeouts_waitq,
216 cfs_atomic_read(&suspend_timeouts) == 0, &lwi);
217 DEBUG_REQ(D_NET, req, "-- recharge regular timeout");
225 static void ptlrpc_pinger_process_import(struct obd_import *imp,
226 unsigned long this_ping)
230 spin_lock(&imp->imp_lock);
231 level = imp->imp_state;
232 force = imp->imp_force_verify;
234 imp->imp_force_verify = 0;
235 spin_unlock(&imp->imp_lock);
237 CDEBUG(level == LUSTRE_IMP_FULL ? D_INFO : D_HA,
238 "level %s/%u force %u deactive %u pingable %u\n",
239 ptlrpc_import_state_name(level), level,
240 force, imp->imp_deactive, imp->imp_pingable);
242 if (cfs_time_aftereq(imp->imp_next_ping - 5 * CFS_TICK,
243 this_ping) && force == 0)
246 if (level == LUSTRE_IMP_DISCON && !imp_is_deactive(imp)) {
247 /* wait for a while before trying recovery again */
248 imp->imp_next_ping = ptlrpc_next_reconnect(imp);
249 if (!imp->imp_no_pinger_recover)
250 ptlrpc_initiate_recovery(imp);
251 } else if (level != LUSTRE_IMP_FULL ||
252 imp->imp_obd->obd_no_recov ||
253 imp_is_deactive(imp)) {
254 CDEBUG(D_HA, "not pinging %s (in recovery "
255 " or recovery disabled: %s)\n",
256 obd2cli_tgt(imp->imp_obd),
257 ptlrpc_import_state_name(level));
258 } else if (imp->imp_pingable || force) {
263 static int ptlrpc_pinger_main(void *arg)
265 struct ptlrpc_thread *thread = (struct ptlrpc_thread *)arg;
268 cfs_daemonize(thread->t_name);
270 /* Record that the thread is running */
271 thread_set_flags(thread, SVC_RUNNING);
272 cfs_waitq_signal(&thread->t_ctl_waitq);
274 /* And now, loop forever, pinging as needed. */
276 cfs_time_t this_ping = cfs_time_current();
277 struct l_wait_info lwi;
278 cfs_duration_t time_to_next_wake;
279 struct timeout_item *item;
282 mutex_lock(&pinger_mutex);
283 cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
284 item->ti_cb(item, item->ti_cb_data);
286 cfs_list_for_each(iter, &pinger_imports) {
287 struct obd_import *imp =
288 cfs_list_entry(iter, struct obd_import,
291 ptlrpc_pinger_process_import(imp, this_ping);
292 /* obd_timeout might have changed */
293 if (imp->imp_pingable && imp->imp_next_ping &&
294 cfs_time_after(imp->imp_next_ping,
295 cfs_time_add(this_ping,
296 cfs_time_seconds(PING_INTERVAL))))
297 ptlrpc_update_next_ping(imp, 0);
299 mutex_unlock(&pinger_mutex);
300 /* update memory usage info */
301 obd_update_maxusage();
303 /* Wait until the next ping time, or until we're stopped. */
304 time_to_next_wake = pinger_check_timeout(this_ping);
305 /* The ping sent by ptlrpc_send_rpc may get sent out
306 say .01 second after this.
307 ptlrpc_pinger_sending_on_import will then set the
308 next ping time to next_ping + .01 sec, which means
309 we will SKIP the next ping at next_ping, and the
310 ping will get sent 2 timeouts from now! Beware. */
311 CDEBUG(D_INFO, "next wakeup in "CFS_DURATION_T" ("
312 CFS_TIME_T")\n", time_to_next_wake,
313 cfs_time_add(this_ping,cfs_time_seconds(PING_INTERVAL)));
314 if (time_to_next_wake > 0) {
315 lwi = LWI_TIMEOUT(max_t(cfs_duration_t,
317 cfs_time_seconds(1)),
319 l_wait_event(thread->t_ctl_waitq,
320 thread_is_stopping(thread) ||
321 thread_is_event(thread),
323 if (thread_test_and_clear_flags(thread, SVC_STOPPING)) {
327 /* woken after adding import to reset timer */
328 thread_test_and_clear_flags(thread, SVC_EVENT);
333 thread_set_flags(thread, SVC_STOPPED);
334 cfs_waitq_signal(&thread->t_ctl_waitq);
336 CDEBUG(D_NET, "pinger thread exiting, process %d\n", cfs_curproc_pid());
340 static struct ptlrpc_thread *pinger_thread = NULL;
342 int ptlrpc_start_pinger(void)
344 struct l_wait_info lwi = { 0 };
346 #ifndef ENABLE_PINGER
351 if (pinger_thread != NULL)
354 OBD_ALLOC_PTR(pinger_thread);
355 if (pinger_thread == NULL)
357 cfs_waitq_init(&pinger_thread->t_ctl_waitq);
358 cfs_waitq_init(&suspend_timeouts_waitq);
360 strcpy(pinger_thread->t_name, "ll_ping");
362 /* CLONE_VM and CLONE_FILES just avoid a needless copy, because we
363 * just drop the VM and FILES in cfs_daemonize_ctxt() right away. */
364 rc = cfs_create_thread(ptlrpc_pinger_main,
365 pinger_thread, CFS_DAEMON_FLAGS);
367 CERROR("cannot start thread: %d\n", rc);
368 OBD_FREE(pinger_thread, sizeof(*pinger_thread));
369 pinger_thread = NULL;
372 l_wait_event(pinger_thread->t_ctl_waitq,
373 thread_is_running(pinger_thread), &lwi);
378 int ptlrpc_pinger_remove_timeouts(void);
380 int ptlrpc_stop_pinger(void)
382 struct l_wait_info lwi = { 0 };
384 #ifndef ENABLE_PINGER
389 if (pinger_thread == NULL)
392 ptlrpc_pinger_remove_timeouts();
393 mutex_lock(&pinger_mutex);
394 thread_set_flags(pinger_thread, SVC_STOPPING);
395 cfs_waitq_signal(&pinger_thread->t_ctl_waitq);
396 mutex_unlock(&pinger_mutex);
398 l_wait_event(pinger_thread->t_ctl_waitq,
399 thread_is_stopped(pinger_thread), &lwi);
401 OBD_FREE_PTR(pinger_thread);
402 pinger_thread = NULL;
406 void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
408 ptlrpc_update_next_ping(imp, 0);
410 EXPORT_SYMBOL(ptlrpc_pinger_sending_on_import);
412 void ptlrpc_pinger_commit_expected(struct obd_import *imp)
414 ptlrpc_update_next_ping(imp, 1);
417 int ptlrpc_pinger_add_import(struct obd_import *imp)
420 if (!cfs_list_empty(&imp->imp_pinger_chain))
423 mutex_lock(&pinger_mutex);
424 CDEBUG(D_HA, "adding pingable import %s->%s\n",
425 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
426 /* if we add to pinger we want recovery on this import */
427 imp->imp_obd->obd_no_recov = 0;
428 ptlrpc_update_next_ping(imp, 0);
429 /* XXX sort, blah blah */
430 cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
431 class_import_get(imp);
433 ptlrpc_pinger_wake_up();
434 mutex_unlock(&pinger_mutex);
438 EXPORT_SYMBOL(ptlrpc_pinger_add_import);
440 int ptlrpc_pinger_del_import(struct obd_import *imp)
443 if (cfs_list_empty(&imp->imp_pinger_chain))
446 mutex_lock(&pinger_mutex);
447 cfs_list_del_init(&imp->imp_pinger_chain);
448 CDEBUG(D_HA, "removing pingable import %s->%s\n",
449 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
450 /* if we remove from pinger we don't want recovery on this import */
451 imp->imp_obd->obd_no_recov = 1;
452 class_import_put(imp);
453 mutex_unlock(&pinger_mutex);
456 EXPORT_SYMBOL(ptlrpc_pinger_del_import);
459 * Register a timeout callback to the pinger list, and the callback will
460 * be called when timeout happens.
462 struct timeout_item* ptlrpc_new_timeout(int time, enum timeout_event event,
463 timeout_cb_t cb, void *data)
465 struct timeout_item *ti;
471 CFS_INIT_LIST_HEAD(&ti->ti_obd_list);
472 CFS_INIT_LIST_HEAD(&ti->ti_chain);
473 ti->ti_timeout = time;
474 ti->ti_event = event;
476 ti->ti_cb_data = data;
482 * Register timeout event on the the pinger thread.
483 * Note: the timeout list is an sorted list with increased timeout value.
485 static struct timeout_item*
486 ptlrpc_pinger_register_timeout(int time, enum timeout_event event,
487 timeout_cb_t cb, void *data)
489 struct timeout_item *item, *tmp;
491 LASSERT_MUTEX_LOCKED(&pinger_mutex);
493 cfs_list_for_each_entry(item, &timeout_list, ti_chain)
494 if (item->ti_event == event)
497 item = ptlrpc_new_timeout(time, event, cb, data);
499 cfs_list_for_each_entry_reverse(tmp, &timeout_list, ti_chain) {
500 if (tmp->ti_timeout < time) {
501 cfs_list_add(&item->ti_chain, &tmp->ti_chain);
505 cfs_list_add(&item->ti_chain, &timeout_list);
511 /* Add a client_obd to the timeout event list, when timeout(@time)
512 * happens, the callback(@cb) will be called.
514 int ptlrpc_add_timeout_client(int time, enum timeout_event event,
515 timeout_cb_t cb, void *data,
516 cfs_list_t *obd_list)
518 struct timeout_item *ti;
520 mutex_lock(&pinger_mutex);
521 ti = ptlrpc_pinger_register_timeout(time, event, cb, data);
523 mutex_unlock(&pinger_mutex);
526 cfs_list_add(obd_list, &ti->ti_obd_list);
527 mutex_unlock(&pinger_mutex);
530 EXPORT_SYMBOL(ptlrpc_add_timeout_client);
532 int ptlrpc_del_timeout_client(cfs_list_t *obd_list,
533 enum timeout_event event)
535 struct timeout_item *ti = NULL, *item;
537 if (cfs_list_empty(obd_list))
539 mutex_lock(&pinger_mutex);
540 cfs_list_del_init(obd_list);
542 * If there are no obd attached to the timeout event
543 * list, remove this timeout event from the pinger
545 cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
546 if (item->ti_event == event) {
551 LASSERTF(ti != NULL, "ti is NULL ! \n");
552 if (cfs_list_empty(&ti->ti_obd_list)) {
553 cfs_list_del(&ti->ti_chain);
556 mutex_unlock(&pinger_mutex);
559 EXPORT_SYMBOL(ptlrpc_del_timeout_client);
561 int ptlrpc_pinger_remove_timeouts(void)
563 struct timeout_item *item, *tmp;
565 mutex_lock(&pinger_mutex);
566 cfs_list_for_each_entry_safe(item, tmp, &timeout_list, ti_chain) {
567 LASSERT(cfs_list_empty(&item->ti_obd_list));
568 cfs_list_del(&item->ti_chain);
571 mutex_unlock(&pinger_mutex);
575 void ptlrpc_pinger_wake_up()
578 thread_add_flags(pinger_thread, SVC_EVENT);
579 cfs_waitq_signal(&pinger_thread->t_ctl_waitq);
583 /* Ping evictor thread */
585 #define PET_TERMINATE 2
587 static int pet_refcount = 0;
588 static int pet_state;
589 static cfs_waitq_t pet_waitq;
590 CFS_LIST_HEAD(pet_list);
591 static DEFINE_SPINLOCK(pet_lock);
593 int ping_evictor_wake(struct obd_export *exp)
595 struct obd_device *obd;
597 spin_lock(&pet_lock);
598 if (pet_state != PET_READY) {
599 /* eventually the new obd will call here again. */
600 spin_unlock(&pet_lock);
604 obd = class_exp2obd(exp);
605 if (cfs_list_empty(&obd->obd_evict_list)) {
606 class_incref(obd, "evictor", obd);
607 cfs_list_add(&obd->obd_evict_list, &pet_list);
609 spin_unlock(&pet_lock);
611 cfs_waitq_signal(&pet_waitq);
615 static int ping_evictor_main(void *arg)
617 struct obd_device *obd;
618 struct obd_export *exp;
619 struct l_wait_info lwi = { 0 };
623 cfs_daemonize_ctxt("ll_evictor");
625 CDEBUG(D_HA, "Starting Ping Evictor\n");
626 pet_state = PET_READY;
628 l_wait_event(pet_waitq, (!cfs_list_empty(&pet_list)) ||
629 (pet_state == PET_TERMINATE), &lwi);
631 /* loop until all obd's will be removed */
632 if ((pet_state == PET_TERMINATE) && cfs_list_empty(&pet_list))
635 /* we only get here if pet_exp != NULL, and the end of this
636 * loop is the only place which sets it NULL again, so lock
637 * is not strictly necessary. */
638 spin_lock(&pet_lock);
639 obd = cfs_list_entry(pet_list.next, struct obd_device,
641 spin_unlock(&pet_lock);
643 expire_time = cfs_time_current_sec() - PING_EVICT_TIMEOUT;
645 CDEBUG(D_HA, "evicting all exports of obd %s older than %ld\n",
646 obd->obd_name, expire_time);
648 /* Exports can't be deleted out of the list while we hold
649 * the obd lock (class_unlink_export), which means we can't
650 * lose the last ref on the export. If they've already been
651 * removed from the list, we won't find them here. */
652 spin_lock(&obd->obd_dev_lock);
653 while (!cfs_list_empty(&obd->obd_exports_timed)) {
654 exp = cfs_list_entry(obd->obd_exports_timed.next,
656 exp_obd_chain_timed);
657 if (expire_time > exp->exp_last_request_time) {
658 class_export_get(exp);
659 spin_unlock(&obd->obd_dev_lock);
660 LCONSOLE_WARN("%s: haven't heard from client %s"
661 " (at %s) in %ld seconds. I think"
662 " it's dead, and I am evicting"
663 " it. exp %p, cur %ld expire %ld"
666 obd_uuid2str(&exp->exp_client_uuid),
667 obd_export_nid2str(exp),
668 (long)(cfs_time_current_sec() -
669 exp->exp_last_request_time),
670 exp, (long)cfs_time_current_sec(),
672 (long)exp->exp_last_request_time);
673 CDEBUG(D_HA, "Last request was at %ld\n",
674 exp->exp_last_request_time);
675 class_fail_export(exp);
676 class_export_put(exp);
677 spin_lock(&obd->obd_dev_lock);
679 /* List is sorted, so everyone below is ok */
683 spin_unlock(&obd->obd_dev_lock);
685 spin_lock(&pet_lock);
686 cfs_list_del_init(&obd->obd_evict_list);
687 spin_unlock(&pet_lock);
689 class_decref(obd, "evictor", obd);
691 CDEBUG(D_HA, "Exiting Ping Evictor\n");
696 void ping_evictor_start(void)
700 if (++pet_refcount > 1)
703 cfs_waitq_init(&pet_waitq);
705 rc = cfs_create_thread(ping_evictor_main, NULL, CFS_DAEMON_FLAGS);
708 CERROR("Cannot start ping evictor thread: %d\n", rc);
711 EXPORT_SYMBOL(ping_evictor_start);
713 void ping_evictor_stop(void)
715 if (--pet_refcount > 0)
718 pet_state = PET_TERMINATE;
719 cfs_waitq_signal(&pet_waitq);
721 EXPORT_SYMBOL(ping_evictor_stop);
722 #else /* !__KERNEL__ */
725 * the current implementation of pinger in liblustre is not optimized
729 static struct pinger_data {
731 cfs_time_t pd_this_ping; /* jiffies */
732 cfs_time_t pd_next_ping; /* jiffies */
733 struct ptlrpc_request_set *pd_set;
736 static int pinger_check_rpcs(void *arg)
738 cfs_time_t curtime = cfs_time_current();
739 struct ptlrpc_request *req;
740 struct ptlrpc_request_set *set;
742 struct obd_import *imp;
743 struct pinger_data *pd = &pinger_args;
746 /* prevent recursion */
747 if (pd->pd_recursion++) {
748 CDEBUG(D_HA, "pinger: recursion! quit\n");
754 /* have we reached ping point? */
755 if (!pd->pd_set && cfs_time_before(curtime, pd->pd_next_ping)) {
760 /* if we have rpc_set already, continue processing it */
762 LASSERT(pd->pd_this_ping);
767 pd->pd_this_ping = curtime;
768 pd->pd_set = ptlrpc_prep_set();
769 if (pd->pd_set == NULL)
773 /* add rpcs into set */
774 mutex_lock(&pinger_mutex);
775 cfs_list_for_each(iter, &pinger_imports) {
776 struct obd_import *imp = cfs_list_entry(iter, struct obd_import,
778 int generation, level;
780 if (cfs_time_aftereq(pd->pd_this_ping,
781 imp->imp_next_ping - 5 * CFS_TICK)) {
783 spin_lock(&imp->imp_lock);
784 generation = imp->imp_generation;
785 level = imp->imp_state;
786 spin_unlock(&imp->imp_lock);
788 if (level != LUSTRE_IMP_FULL) {
790 "not pinging %s (in recovery)\n",
791 obd2cli_tgt(imp->imp_obd));
795 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING,
799 CERROR("OOM trying to ping %s->%s\n",
800 imp->imp_obd->obd_uuid.uuid,
801 obd2cli_tgt(imp->imp_obd));
805 req->rq_no_resend = 1;
806 ptlrpc_request_set_replen(req);
807 req->rq_send_state = LUSTRE_IMP_FULL;
808 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
809 req->rq_import_generation = generation;
810 ptlrpc_set_add_req(set, req);
812 CDEBUG(D_INFO, "don't need to ping %s ("CFS_TIME_T
813 " > "CFS_TIME_T")\n", obd2cli_tgt(imp->imp_obd),
814 imp->imp_next_ping, pd->pd_this_ping);
817 pd->pd_this_ping = curtime;
818 mutex_unlock(&pinger_mutex);
820 /* Might be empty, that's OK. */
821 if (cfs_atomic_read(&set->set_remaining) == 0)
822 CDEBUG(D_RPCTRACE, "nothing to ping\n");
824 cfs_list_for_each(iter, &set->set_requests) {
825 struct ptlrpc_request *req =
826 cfs_list_entry(iter, struct ptlrpc_request,
828 DEBUG_REQ(D_RPCTRACE, req, "pinging %s->%s",
829 req->rq_import->imp_obd->obd_uuid.uuid,
830 obd2cli_tgt(req->rq_import->imp_obd));
831 (void)ptl_send_rpc(req, 0);
835 rc = ptlrpc_check_set(NULL, set);
837 /* not finished, and we are not expired, simply return */
838 if (!rc && cfs_time_before(curtime, cfs_time_add(pd->pd_this_ping,
839 cfs_time_seconds(PING_INTERVAL)))) {
840 CDEBUG(D_RPCTRACE, "not finished, but also not expired\n");
845 /* Expire all the requests that didn't come back. */
846 mutex_lock(&pinger_mutex);
847 cfs_list_for_each(iter, &set->set_requests) {
848 req = cfs_list_entry(iter, struct ptlrpc_request,
851 if (req->rq_phase == RQ_PHASE_COMPLETE)
854 CDEBUG(D_RPCTRACE, "Pinger initiate expire request(%p)\n",
857 /* This will also unregister reply. */
858 ptlrpc_expire_one_request(req, 0);
860 /* We're done with this req, let's finally move it to complete
861 * phase and take care of inflights. */
862 ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
863 imp = req->rq_import;
864 spin_lock(&imp->imp_lock);
865 if (!cfs_list_empty(&req->rq_list)) {
866 cfs_list_del_init(&req->rq_list);
867 cfs_atomic_dec(&imp->imp_inflight);
869 spin_unlock(&imp->imp_lock);
870 cfs_atomic_dec(&set->set_remaining);
872 mutex_unlock(&pinger_mutex);
874 ptlrpc_set_destroy(set);
878 pd->pd_next_ping = cfs_time_add(pd->pd_this_ping,
879 cfs_time_seconds(PING_INTERVAL));
880 pd->pd_this_ping = 0; /* XXX for debug */
882 CDEBUG(D_INFO, "finished a round ping\n");
887 static void *pinger_callback = NULL;
888 #endif /* ENABLE_PINGER */
890 int ptlrpc_start_pinger(void)
893 memset(&pinger_args, 0, sizeof(pinger_args));
894 pinger_callback = liblustre_register_wait_callback("pinger_check_rpcs",
901 int ptlrpc_stop_pinger(void)
905 liblustre_deregister_wait_callback(pinger_callback);
910 void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
913 mutex_lock(&pinger_mutex);
914 ptlrpc_update_next_ping(imp, 0);
915 if (pinger_args.pd_set == NULL &&
916 cfs_time_before(imp->imp_next_ping, pinger_args.pd_next_ping)) {
917 CDEBUG(D_HA, "set next ping to "CFS_TIME_T"(cur "CFS_TIME_T")\n",
918 imp->imp_next_ping, cfs_time_current());
919 pinger_args.pd_next_ping = imp->imp_next_ping;
921 mutex_unlock(&pinger_mutex);
925 void ptlrpc_pinger_commit_expected(struct obd_import *imp)
928 mutex_lock(&pinger_mutex);
929 ptlrpc_update_next_ping(imp, 1);
930 if (pinger_args.pd_set == NULL &&
931 cfs_time_before(imp->imp_next_ping, pinger_args.pd_next_ping)) {
932 CDEBUG(D_HA,"set next ping to "CFS_TIME_T"(cur "CFS_TIME_T")\n",
933 imp->imp_next_ping, cfs_time_current());
934 pinger_args.pd_next_ping = imp->imp_next_ping;
936 mutex_unlock(&pinger_mutex);
940 int ptlrpc_add_timeout_client(int time, enum timeout_event event,
941 timeout_cb_t cb, void *data,
942 cfs_list_t *obd_list)
947 int ptlrpc_del_timeout_client(cfs_list_t *obd_list,
948 enum timeout_event event)
953 int ptlrpc_pinger_add_import(struct obd_import *imp)
956 if (!cfs_list_empty(&imp->imp_pinger_chain))
959 CDEBUG(D_HA, "adding pingable import %s->%s\n",
960 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
961 ptlrpc_pinger_sending_on_import(imp);
963 mutex_lock(&pinger_mutex);
964 cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
965 class_import_get(imp);
966 mutex_unlock(&pinger_mutex);
971 int ptlrpc_pinger_del_import(struct obd_import *imp)
974 if (cfs_list_empty(&imp->imp_pinger_chain))
977 mutex_lock(&pinger_mutex);
978 cfs_list_del_init(&imp->imp_pinger_chain);
979 CDEBUG(D_HA, "removing pingable import %s->%s\n",
980 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
981 class_import_put(imp);
982 mutex_unlock(&pinger_mutex);
986 void ptlrpc_pinger_wake_up()
989 /* XXX force pinger to run, if needed */
990 struct obd_import *imp;
992 cfs_list_for_each_entry(imp, &pinger_imports, imp_pinger_chain) {
993 CDEBUG(D_RPCTRACE, "checking import %s->%s\n",
994 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
995 #ifdef ENABLE_LIBLUSTRE_RECOVERY
996 if (imp->imp_state == LUSTRE_IMP_DISCON &&
997 !imp_is_deactive(imp))
999 /*XXX only recover for the initial connection */
1000 if (!lustre_handle_is_used(&imp->imp_remote_handle) &&
1001 imp->imp_state == LUSTRE_IMP_DISCON &&
1002 !imp_is_deactive(imp))
1004 ptlrpc_initiate_recovery(imp);
1005 else if (imp->imp_state != LUSTRE_IMP_FULL)
1006 CDEBUG(D_HA, "Refused to recover import %s->%s "
1007 "state %d, deactive %d\n",
1008 imp->imp_obd->obd_uuid.uuid,
1009 obd2cli_tgt(imp->imp_obd), imp->imp_state,
1010 imp_is_deactive(imp));
1015 #endif /* !__KERNEL__ */