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, 2013, 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 static int suppress_pings;
52 CFS_MODULE_PARM(suppress_pings, "i", int, 0644, "Suppress pings");
54 struct mutex pinger_mutex;
55 static CFS_LIST_HEAD(pinger_imports);
56 static cfs_list_t timeout_list = CFS_LIST_HEAD_INIT(timeout_list);
58 int ptlrpc_pinger_suppress_pings()
60 return suppress_pings;
62 EXPORT_SYMBOL(ptlrpc_pinger_suppress_pings);
64 struct ptlrpc_request *
65 ptlrpc_prep_ping(struct obd_import *imp)
67 struct ptlrpc_request *req;
69 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING,
70 LUSTRE_OBD_VERSION, OBD_PING);
72 ptlrpc_request_set_replen(req);
73 req->rq_no_resend = req->rq_no_delay = 1;
78 int ptlrpc_obd_ping(struct obd_device *obd)
81 struct ptlrpc_request *req;
84 req = ptlrpc_prep_ping(obd->u.cli.cl_import);
88 req->rq_send_state = LUSTRE_IMP_FULL;
90 rc = ptlrpc_queue_wait(req);
92 ptlrpc_req_finished(req);
96 EXPORT_SYMBOL(ptlrpc_obd_ping);
98 int ptlrpc_ping(struct obd_import *imp)
100 struct ptlrpc_request *req;
103 req = ptlrpc_prep_ping(imp);
105 CERROR("OOM trying to ping %s->%s\n",
106 imp->imp_obd->obd_uuid.uuid,
107 obd2cli_tgt(imp->imp_obd));
111 DEBUG_REQ(D_INFO, req, "pinging %s->%s",
112 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
113 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
118 void ptlrpc_update_next_ping(struct obd_import *imp, int soon)
121 int time = soon ? PING_INTERVAL_SHORT : PING_INTERVAL;
122 if (imp->imp_state == LUSTRE_IMP_DISCON) {
123 int dtime = max_t(int, CONNECTION_SWITCH_MIN,
125 at_get(&imp->imp_at.iat_net_latency));
126 time = min(time, dtime);
128 imp->imp_next_ping = cfs_time_shift(time);
129 #endif /* ENABLE_PINGER */
132 void ptlrpc_ping_import_soon(struct obd_import *imp)
134 imp->imp_next_ping = cfs_time_current();
137 static inline int imp_is_deactive(struct obd_import *imp)
139 return (imp->imp_deactive ||
140 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_IMP_DEACTIVE));
143 static inline int ptlrpc_next_reconnect(struct obd_import *imp)
145 if (imp->imp_server_timeout)
146 return cfs_time_shift(obd_timeout / 2);
148 return cfs_time_shift(obd_timeout);
151 static cfs_atomic_t suspend_timeouts = CFS_ATOMIC_INIT(0);
152 static cfs_time_t suspend_wakeup_time = 0;
154 cfs_duration_t pinger_check_timeout(cfs_time_t time)
156 struct timeout_item *item;
157 cfs_time_t timeout = PING_INTERVAL;
159 /* The timeout list is a increase order sorted list */
160 mutex_lock(&pinger_mutex);
161 cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
162 int ti_timeout = item->ti_timeout;
163 if (timeout > ti_timeout)
164 timeout = ti_timeout;
167 mutex_unlock(&pinger_mutex);
169 return cfs_time_sub(cfs_time_add(time, cfs_time_seconds(timeout)),
173 static cfs_waitq_t suspend_timeouts_waitq;
175 cfs_time_t ptlrpc_suspend_wakeup_time(void)
177 return suspend_wakeup_time;
180 void ptlrpc_deactivate_timeouts(struct obd_import *imp)
182 /*XXX: disabled for now, will be replaced by adaptive timeouts */
184 if (imp->imp_no_timeout)
186 imp->imp_no_timeout = 1;
187 cfs_atomic_inc(&suspend_timeouts);
188 CDEBUG(D_HA|D_WARNING, "deactivate timeouts %u\n",
189 cfs_atomic_read(&suspend_timeouts));
193 void ptlrpc_activate_timeouts(struct obd_import *imp)
195 /*XXX: disabled for now, will be replaced by adaptive timeouts */
197 if (!imp->imp_no_timeout)
199 imp->imp_no_timeout = 0;
200 LASSERT(cfs_atomic_read(&suspend_timeouts) > 0);
201 if (cfs_atomic_dec_and_test(&suspend_timeouts)) {
202 suspend_wakeup_time = cfs_time_current();
203 cfs_waitq_signal(&suspend_timeouts_waitq);
205 CDEBUG(D_HA|D_WARNING, "activate timeouts %u\n",
206 cfs_atomic_read(&suspend_timeouts));
210 int ptlrpc_check_suspend(void)
212 if (cfs_atomic_read(&suspend_timeouts))
217 int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req)
219 struct l_wait_info lwi;
221 if (cfs_atomic_read(&suspend_timeouts)) {
222 DEBUG_REQ(D_NET, req, "-- suspend %d regular timeout",
223 cfs_atomic_read(&suspend_timeouts));
224 lwi = LWI_INTR(NULL, NULL);
225 l_wait_event(suspend_timeouts_waitq,
226 cfs_atomic_read(&suspend_timeouts) == 0, &lwi);
227 DEBUG_REQ(D_NET, req, "-- recharge regular timeout");
237 void ptlrpc_pinger_ir_up(void)
239 CDEBUG(D_HA, "IR up\n");
242 EXPORT_SYMBOL(ptlrpc_pinger_ir_up);
244 void ptlrpc_pinger_ir_down(void)
246 CDEBUG(D_HA, "IR down\n");
249 EXPORT_SYMBOL(ptlrpc_pinger_ir_down);
251 static void ptlrpc_pinger_process_import(struct obd_import *imp,
252 unsigned long this_ping)
259 spin_lock(&imp->imp_lock);
261 level = imp->imp_state;
262 force = imp->imp_force_verify;
263 force_next = imp->imp_force_next_verify;
265 * This will be used below only if the import is "FULL".
267 suppress = ir_up && OCD_HAS_FLAG(&imp->imp_connect_data, PINGLESS);
269 imp->imp_force_verify = 0;
271 if (cfs_time_aftereq(imp->imp_next_ping - 5 * CFS_TICK, this_ping) &&
273 spin_unlock(&imp->imp_lock);
277 imp->imp_force_next_verify = 0;
279 spin_unlock(&imp->imp_lock);
281 CDEBUG(level == LUSTRE_IMP_FULL ? D_INFO : D_HA, "%s->%s: level %s/%u "
282 "force %u force_next %u deactive %u pingable %u suppress %u\n",
283 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd),
284 ptlrpc_import_state_name(level), level, force, force_next,
285 imp->imp_deactive, imp->imp_pingable, suppress);
287 if (level == LUSTRE_IMP_DISCON && !imp_is_deactive(imp)) {
288 /* wait for a while before trying recovery again */
289 imp->imp_next_ping = ptlrpc_next_reconnect(imp);
290 if (!imp->imp_no_pinger_recover)
291 ptlrpc_initiate_recovery(imp);
292 } else if (level != LUSTRE_IMP_FULL ||
293 imp->imp_obd->obd_no_recov ||
294 imp_is_deactive(imp)) {
295 CDEBUG(D_HA, "%s->%s: not pinging (in recovery "
296 "or recovery disabled: %s)\n",
297 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd),
298 ptlrpc_import_state_name(level));
299 } else if ((imp->imp_pingable && !suppress) || force_next || force) {
304 static int ptlrpc_pinger_main(void *arg)
306 struct ptlrpc_thread *thread = (struct ptlrpc_thread *)arg;
309 cfs_daemonize(thread->t_name);
311 /* Record that the thread is running */
312 thread_set_flags(thread, SVC_RUNNING);
313 cfs_waitq_signal(&thread->t_ctl_waitq);
315 /* And now, loop forever, pinging as needed. */
317 cfs_time_t this_ping = cfs_time_current();
318 struct l_wait_info lwi;
319 cfs_duration_t time_to_next_wake;
320 struct timeout_item *item;
323 mutex_lock(&pinger_mutex);
324 cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
325 item->ti_cb(item, item->ti_cb_data);
327 cfs_list_for_each(iter, &pinger_imports) {
328 struct obd_import *imp =
329 cfs_list_entry(iter, struct obd_import,
332 ptlrpc_pinger_process_import(imp, this_ping);
333 /* obd_timeout might have changed */
334 if (imp->imp_pingable && imp->imp_next_ping &&
335 cfs_time_after(imp->imp_next_ping,
336 cfs_time_add(this_ping,
337 cfs_time_seconds(PING_INTERVAL))))
338 ptlrpc_update_next_ping(imp, 0);
340 mutex_unlock(&pinger_mutex);
341 /* update memory usage info */
342 obd_update_maxusage();
344 /* Wait until the next ping time, or until we're stopped. */
345 time_to_next_wake = pinger_check_timeout(this_ping);
346 /* The ping sent by ptlrpc_send_rpc may get sent out
347 say .01 second after this.
348 ptlrpc_pinger_sending_on_import will then set the
349 next ping time to next_ping + .01 sec, which means
350 we will SKIP the next ping at next_ping, and the
351 ping will get sent 2 timeouts from now! Beware. */
352 CDEBUG(D_INFO, "next wakeup in "CFS_DURATION_T" ("
353 CFS_TIME_T")\n", time_to_next_wake,
354 cfs_time_add(this_ping,cfs_time_seconds(PING_INTERVAL)));
355 if (time_to_next_wake > 0) {
356 lwi = LWI_TIMEOUT(max_t(cfs_duration_t,
358 cfs_time_seconds(1)),
360 l_wait_event(thread->t_ctl_waitq,
361 thread_is_stopping(thread) ||
362 thread_is_event(thread),
364 if (thread_test_and_clear_flags(thread, SVC_STOPPING)) {
368 /* woken after adding import to reset timer */
369 thread_test_and_clear_flags(thread, SVC_EVENT);
374 thread_set_flags(thread, SVC_STOPPED);
375 cfs_waitq_signal(&thread->t_ctl_waitq);
377 CDEBUG(D_NET, "pinger thread exiting, process %d\n", cfs_curproc_pid());
381 static struct ptlrpc_thread *pinger_thread = NULL;
383 int ptlrpc_start_pinger(void)
385 struct l_wait_info lwi = { 0 };
387 #ifndef ENABLE_PINGER
392 if (pinger_thread != NULL)
395 OBD_ALLOC_PTR(pinger_thread);
396 if (pinger_thread == NULL)
398 cfs_waitq_init(&pinger_thread->t_ctl_waitq);
399 cfs_waitq_init(&suspend_timeouts_waitq);
401 strcpy(pinger_thread->t_name, "ll_ping");
403 /* CLONE_VM and CLONE_FILES just avoid a needless copy, because we
404 * just drop the VM and FILES in cfs_daemonize_ctxt() right away. */
405 rc = cfs_create_thread(ptlrpc_pinger_main,
406 pinger_thread, CFS_DAEMON_FLAGS);
408 CERROR("cannot start thread: %d\n", rc);
409 OBD_FREE(pinger_thread, sizeof(*pinger_thread));
410 pinger_thread = NULL;
413 l_wait_event(pinger_thread->t_ctl_waitq,
414 thread_is_running(pinger_thread), &lwi);
417 CWARN("Pings will be suppressed at the request of the "
418 "administrator. The configuration shall meet the "
419 "additional requirements described in the manual. "
420 "(Search for the \"suppress_pings\" kernel module "
426 int ptlrpc_pinger_remove_timeouts(void);
428 int ptlrpc_stop_pinger(void)
430 struct l_wait_info lwi = { 0 };
432 #ifndef ENABLE_PINGER
437 if (pinger_thread == NULL)
440 ptlrpc_pinger_remove_timeouts();
441 mutex_lock(&pinger_mutex);
442 thread_set_flags(pinger_thread, SVC_STOPPING);
443 cfs_waitq_signal(&pinger_thread->t_ctl_waitq);
444 mutex_unlock(&pinger_mutex);
446 l_wait_event(pinger_thread->t_ctl_waitq,
447 thread_is_stopped(pinger_thread), &lwi);
449 OBD_FREE_PTR(pinger_thread);
450 pinger_thread = NULL;
454 void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
456 ptlrpc_update_next_ping(imp, 0);
458 EXPORT_SYMBOL(ptlrpc_pinger_sending_on_import);
460 void ptlrpc_pinger_commit_expected(struct obd_import *imp)
462 ptlrpc_update_next_ping(imp, 1);
463 LASSERT_SPIN_LOCKED(&imp->imp_lock);
465 * Avoid reading stale imp_connect_data. When not sure if pings are
466 * expected or not on next connection, we assume they are not and force
467 * one anyway to guarantee the chance of updating
468 * imp_peer_committed_transno.
470 if (imp->imp_state != LUSTRE_IMP_FULL ||
471 OCD_HAS_FLAG(&imp->imp_connect_data, PINGLESS))
472 imp->imp_force_next_verify = 1;
475 int ptlrpc_pinger_add_import(struct obd_import *imp)
478 if (!cfs_list_empty(&imp->imp_pinger_chain))
481 mutex_lock(&pinger_mutex);
482 CDEBUG(D_HA, "adding pingable import %s->%s\n",
483 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
484 /* if we add to pinger we want recovery on this import */
485 imp->imp_obd->obd_no_recov = 0;
486 ptlrpc_update_next_ping(imp, 0);
487 /* XXX sort, blah blah */
488 cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
489 class_import_get(imp);
491 ptlrpc_pinger_wake_up();
492 mutex_unlock(&pinger_mutex);
496 EXPORT_SYMBOL(ptlrpc_pinger_add_import);
498 int ptlrpc_pinger_del_import(struct obd_import *imp)
501 if (cfs_list_empty(&imp->imp_pinger_chain))
504 mutex_lock(&pinger_mutex);
505 cfs_list_del_init(&imp->imp_pinger_chain);
506 CDEBUG(D_HA, "removing pingable import %s->%s\n",
507 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
508 /* if we remove from pinger we don't want recovery on this import */
509 imp->imp_obd->obd_no_recov = 1;
510 class_import_put(imp);
511 mutex_unlock(&pinger_mutex);
514 EXPORT_SYMBOL(ptlrpc_pinger_del_import);
517 * Register a timeout callback to the pinger list, and the callback will
518 * be called when timeout happens.
520 struct timeout_item* ptlrpc_new_timeout(int time, enum timeout_event event,
521 timeout_cb_t cb, void *data)
523 struct timeout_item *ti;
529 CFS_INIT_LIST_HEAD(&ti->ti_obd_list);
530 CFS_INIT_LIST_HEAD(&ti->ti_chain);
531 ti->ti_timeout = time;
532 ti->ti_event = event;
534 ti->ti_cb_data = data;
540 * Register timeout event on the the pinger thread.
541 * Note: the timeout list is an sorted list with increased timeout value.
543 static struct timeout_item*
544 ptlrpc_pinger_register_timeout(int time, enum timeout_event event,
545 timeout_cb_t cb, void *data)
547 struct timeout_item *item, *tmp;
549 LASSERT_MUTEX_LOCKED(&pinger_mutex);
551 cfs_list_for_each_entry(item, &timeout_list, ti_chain)
552 if (item->ti_event == event)
555 item = ptlrpc_new_timeout(time, event, cb, data);
557 cfs_list_for_each_entry_reverse(tmp, &timeout_list, ti_chain) {
558 if (tmp->ti_timeout < time) {
559 cfs_list_add(&item->ti_chain, &tmp->ti_chain);
563 cfs_list_add(&item->ti_chain, &timeout_list);
569 /* Add a client_obd to the timeout event list, when timeout(@time)
570 * happens, the callback(@cb) will be called.
572 int ptlrpc_add_timeout_client(int time, enum timeout_event event,
573 timeout_cb_t cb, void *data,
574 cfs_list_t *obd_list)
576 struct timeout_item *ti;
578 mutex_lock(&pinger_mutex);
579 ti = ptlrpc_pinger_register_timeout(time, event, cb, data);
581 mutex_unlock(&pinger_mutex);
584 cfs_list_add(obd_list, &ti->ti_obd_list);
585 mutex_unlock(&pinger_mutex);
588 EXPORT_SYMBOL(ptlrpc_add_timeout_client);
590 int ptlrpc_del_timeout_client(cfs_list_t *obd_list,
591 enum timeout_event event)
593 struct timeout_item *ti = NULL, *item;
595 if (cfs_list_empty(obd_list))
597 mutex_lock(&pinger_mutex);
598 cfs_list_del_init(obd_list);
600 * If there are no obd attached to the timeout event
601 * list, remove this timeout event from the pinger
603 cfs_list_for_each_entry(item, &timeout_list, ti_chain) {
604 if (item->ti_event == event) {
609 LASSERTF(ti != NULL, "ti is NULL ! \n");
610 if (cfs_list_empty(&ti->ti_obd_list)) {
611 cfs_list_del(&ti->ti_chain);
614 mutex_unlock(&pinger_mutex);
617 EXPORT_SYMBOL(ptlrpc_del_timeout_client);
619 int ptlrpc_pinger_remove_timeouts(void)
621 struct timeout_item *item, *tmp;
623 mutex_lock(&pinger_mutex);
624 cfs_list_for_each_entry_safe(item, tmp, &timeout_list, ti_chain) {
625 LASSERT(cfs_list_empty(&item->ti_obd_list));
626 cfs_list_del(&item->ti_chain);
629 mutex_unlock(&pinger_mutex);
633 void ptlrpc_pinger_wake_up()
636 thread_add_flags(pinger_thread, SVC_EVENT);
637 cfs_waitq_signal(&pinger_thread->t_ctl_waitq);
641 /* Ping evictor thread */
643 #define PET_TERMINATE 2
645 static int pet_refcount = 0;
646 static int pet_state;
647 static cfs_waitq_t pet_waitq;
648 CFS_LIST_HEAD(pet_list);
649 static DEFINE_SPINLOCK(pet_lock);
651 int ping_evictor_wake(struct obd_export *exp)
653 struct obd_device *obd;
655 spin_lock(&pet_lock);
656 if (pet_state != PET_READY) {
657 /* eventually the new obd will call here again. */
658 spin_unlock(&pet_lock);
662 obd = class_exp2obd(exp);
663 if (cfs_list_empty(&obd->obd_evict_list)) {
664 class_incref(obd, "evictor", obd);
665 cfs_list_add(&obd->obd_evict_list, &pet_list);
667 spin_unlock(&pet_lock);
669 cfs_waitq_signal(&pet_waitq);
673 static int ping_evictor_main(void *arg)
675 struct obd_device *obd;
676 struct obd_export *exp;
677 struct l_wait_info lwi = { 0 };
681 cfs_daemonize_ctxt("ll_evictor");
683 CDEBUG(D_HA, "Starting Ping Evictor\n");
684 pet_state = PET_READY;
686 l_wait_event(pet_waitq, (!cfs_list_empty(&pet_list)) ||
687 (pet_state == PET_TERMINATE), &lwi);
689 /* loop until all obd's will be removed */
690 if ((pet_state == PET_TERMINATE) && cfs_list_empty(&pet_list))
693 /* we only get here if pet_exp != NULL, and the end of this
694 * loop is the only place which sets it NULL again, so lock
695 * is not strictly necessary. */
696 spin_lock(&pet_lock);
697 obd = cfs_list_entry(pet_list.next, struct obd_device,
699 spin_unlock(&pet_lock);
701 expire_time = cfs_time_current_sec() - PING_EVICT_TIMEOUT;
703 CDEBUG(D_HA, "evicting all exports of obd %s older than %ld\n",
704 obd->obd_name, expire_time);
706 /* Exports can't be deleted out of the list while we hold
707 * the obd lock (class_unlink_export), which means we can't
708 * lose the last ref on the export. If they've already been
709 * removed from the list, we won't find them here. */
710 spin_lock(&obd->obd_dev_lock);
711 while (!cfs_list_empty(&obd->obd_exports_timed)) {
712 exp = cfs_list_entry(obd->obd_exports_timed.next,
714 exp_obd_chain_timed);
715 if (expire_time > exp->exp_last_request_time) {
716 class_export_get(exp);
717 spin_unlock(&obd->obd_dev_lock);
718 LCONSOLE_WARN("%s: haven't heard from client %s"
719 " (at %s) in %ld seconds. I think"
720 " it's dead, and I am evicting"
721 " it. exp %p, cur %ld expire %ld"
724 obd_uuid2str(&exp->exp_client_uuid),
725 obd_export_nid2str(exp),
726 (long)(cfs_time_current_sec() -
727 exp->exp_last_request_time),
728 exp, (long)cfs_time_current_sec(),
730 (long)exp->exp_last_request_time);
731 CDEBUG(D_HA, "Last request was at %ld\n",
732 exp->exp_last_request_time);
733 class_fail_export(exp);
734 class_export_put(exp);
735 spin_lock(&obd->obd_dev_lock);
737 /* List is sorted, so everyone below is ok */
741 spin_unlock(&obd->obd_dev_lock);
743 spin_lock(&pet_lock);
744 cfs_list_del_init(&obd->obd_evict_list);
745 spin_unlock(&pet_lock);
747 class_decref(obd, "evictor", obd);
749 CDEBUG(D_HA, "Exiting Ping Evictor\n");
754 void ping_evictor_start(void)
758 if (++pet_refcount > 1)
761 cfs_waitq_init(&pet_waitq);
763 rc = cfs_create_thread(ping_evictor_main, NULL, CFS_DAEMON_FLAGS);
766 CERROR("Cannot start ping evictor thread: %d\n", rc);
769 EXPORT_SYMBOL(ping_evictor_start);
771 void ping_evictor_stop(void)
773 if (--pet_refcount > 0)
776 pet_state = PET_TERMINATE;
777 cfs_waitq_signal(&pet_waitq);
779 EXPORT_SYMBOL(ping_evictor_stop);
780 #else /* !__KERNEL__ */
783 * the current implementation of pinger in liblustre is not optimized
787 static struct pinger_data {
789 cfs_time_t pd_this_ping; /* jiffies */
790 cfs_time_t pd_next_ping; /* jiffies */
791 struct ptlrpc_request_set *pd_set;
794 static int pinger_check_rpcs(void *arg)
796 cfs_time_t curtime = cfs_time_current();
797 struct ptlrpc_request *req;
798 struct ptlrpc_request_set *set;
800 struct obd_import *imp;
801 struct pinger_data *pd = &pinger_args;
804 /* prevent recursion */
805 if (pd->pd_recursion++) {
806 CDEBUG(D_HA, "pinger: recursion! quit\n");
812 /* have we reached ping point? */
813 if (!pd->pd_set && cfs_time_before(curtime, pd->pd_next_ping)) {
818 /* if we have rpc_set already, continue processing it */
820 LASSERT(pd->pd_this_ping);
825 pd->pd_this_ping = curtime;
826 pd->pd_set = ptlrpc_prep_set();
827 if (pd->pd_set == NULL)
831 /* add rpcs into set */
832 mutex_lock(&pinger_mutex);
833 cfs_list_for_each(iter, &pinger_imports) {
834 struct obd_import *imp = cfs_list_entry(iter, struct obd_import,
836 int generation, level;
838 if (cfs_time_aftereq(pd->pd_this_ping,
839 imp->imp_next_ping - 5 * CFS_TICK)) {
841 spin_lock(&imp->imp_lock);
842 generation = imp->imp_generation;
843 level = imp->imp_state;
844 spin_unlock(&imp->imp_lock);
846 if (level != LUSTRE_IMP_FULL) {
848 "not pinging %s (in recovery)\n",
849 obd2cli_tgt(imp->imp_obd));
853 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING,
857 CERROR("OOM trying to ping %s->%s\n",
858 imp->imp_obd->obd_uuid.uuid,
859 obd2cli_tgt(imp->imp_obd));
863 req->rq_no_resend = 1;
864 ptlrpc_request_set_replen(req);
865 req->rq_send_state = LUSTRE_IMP_FULL;
866 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
867 req->rq_import_generation = generation;
868 ptlrpc_set_add_req(set, req);
870 CDEBUG(D_INFO, "don't need to ping %s ("CFS_TIME_T
871 " > "CFS_TIME_T")\n", obd2cli_tgt(imp->imp_obd),
872 imp->imp_next_ping, pd->pd_this_ping);
875 pd->pd_this_ping = curtime;
876 mutex_unlock(&pinger_mutex);
878 /* Might be empty, that's OK. */
879 if (cfs_atomic_read(&set->set_remaining) == 0)
880 CDEBUG(D_RPCTRACE, "nothing to ping\n");
882 cfs_list_for_each(iter, &set->set_requests) {
883 struct ptlrpc_request *req =
884 cfs_list_entry(iter, struct ptlrpc_request,
886 DEBUG_REQ(D_RPCTRACE, req, "pinging %s->%s",
887 req->rq_import->imp_obd->obd_uuid.uuid,
888 obd2cli_tgt(req->rq_import->imp_obd));
889 (void)ptl_send_rpc(req, 0);
893 rc = ptlrpc_check_set(NULL, set);
895 /* not finished, and we are not expired, simply return */
896 if (!rc && cfs_time_before(curtime, cfs_time_add(pd->pd_this_ping,
897 cfs_time_seconds(PING_INTERVAL)))) {
898 CDEBUG(D_RPCTRACE, "not finished, but also not expired\n");
903 /* Expire all the requests that didn't come back. */
904 mutex_lock(&pinger_mutex);
905 cfs_list_for_each(iter, &set->set_requests) {
906 req = cfs_list_entry(iter, struct ptlrpc_request,
909 if (req->rq_phase == RQ_PHASE_COMPLETE)
912 CDEBUG(D_RPCTRACE, "Pinger initiate expire request(%p)\n",
915 /* This will also unregister reply. */
916 ptlrpc_expire_one_request(req, 0);
918 /* We're done with this req, let's finally move it to complete
919 * phase and take care of inflights. */
920 ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
921 imp = req->rq_import;
922 spin_lock(&imp->imp_lock);
923 if (!cfs_list_empty(&req->rq_list)) {
924 cfs_list_del_init(&req->rq_list);
925 cfs_atomic_dec(&imp->imp_inflight);
927 spin_unlock(&imp->imp_lock);
928 cfs_atomic_dec(&set->set_remaining);
930 mutex_unlock(&pinger_mutex);
932 ptlrpc_set_destroy(set);
936 pd->pd_next_ping = cfs_time_add(pd->pd_this_ping,
937 cfs_time_seconds(PING_INTERVAL));
938 pd->pd_this_ping = 0; /* XXX for debug */
940 CDEBUG(D_INFO, "finished a round ping\n");
945 static void *pinger_callback = NULL;
946 #endif /* ENABLE_PINGER */
948 int ptlrpc_start_pinger(void)
951 memset(&pinger_args, 0, sizeof(pinger_args));
952 pinger_callback = liblustre_register_wait_callback("pinger_check_rpcs",
959 int ptlrpc_stop_pinger(void)
963 liblustre_deregister_wait_callback(pinger_callback);
968 void ptlrpc_pinger_sending_on_import(struct obd_import *imp)
971 mutex_lock(&pinger_mutex);
972 ptlrpc_update_next_ping(imp, 0);
973 if (pinger_args.pd_set == NULL &&
974 cfs_time_before(imp->imp_next_ping, pinger_args.pd_next_ping)) {
975 CDEBUG(D_HA, "set next ping to "CFS_TIME_T"(cur "CFS_TIME_T")\n",
976 imp->imp_next_ping, cfs_time_current());
977 pinger_args.pd_next_ping = imp->imp_next_ping;
979 mutex_unlock(&pinger_mutex);
983 void ptlrpc_pinger_commit_expected(struct obd_import *imp)
986 mutex_lock(&pinger_mutex);
987 ptlrpc_update_next_ping(imp, 1);
988 if (pinger_args.pd_set == NULL &&
989 cfs_time_before(imp->imp_next_ping, pinger_args.pd_next_ping)) {
990 CDEBUG(D_HA,"set next ping to "CFS_TIME_T"(cur "CFS_TIME_T")\n",
991 imp->imp_next_ping, cfs_time_current());
992 pinger_args.pd_next_ping = imp->imp_next_ping;
994 mutex_unlock(&pinger_mutex);
998 int ptlrpc_add_timeout_client(int time, enum timeout_event event,
999 timeout_cb_t cb, void *data,
1000 cfs_list_t *obd_list)
1005 int ptlrpc_del_timeout_client(cfs_list_t *obd_list,
1006 enum timeout_event event)
1011 int ptlrpc_pinger_add_import(struct obd_import *imp)
1014 if (!cfs_list_empty(&imp->imp_pinger_chain))
1017 CDEBUG(D_HA, "adding pingable import %s->%s\n",
1018 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
1019 ptlrpc_pinger_sending_on_import(imp);
1021 mutex_lock(&pinger_mutex);
1022 cfs_list_add_tail(&imp->imp_pinger_chain, &pinger_imports);
1023 class_import_get(imp);
1024 mutex_unlock(&pinger_mutex);
1029 int ptlrpc_pinger_del_import(struct obd_import *imp)
1032 if (cfs_list_empty(&imp->imp_pinger_chain))
1035 mutex_lock(&pinger_mutex);
1036 cfs_list_del_init(&imp->imp_pinger_chain);
1037 CDEBUG(D_HA, "removing pingable import %s->%s\n",
1038 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
1039 class_import_put(imp);
1040 mutex_unlock(&pinger_mutex);
1044 void ptlrpc_pinger_wake_up()
1046 #ifdef ENABLE_PINGER
1047 /* XXX force pinger to run, if needed */
1048 struct obd_import *imp;
1050 cfs_list_for_each_entry(imp, &pinger_imports, imp_pinger_chain) {
1051 CDEBUG(D_RPCTRACE, "checking import %s->%s\n",
1052 imp->imp_obd->obd_uuid.uuid, obd2cli_tgt(imp->imp_obd));
1053 #ifdef ENABLE_LIBLUSTRE_RECOVERY
1054 if (imp->imp_state == LUSTRE_IMP_DISCON &&
1055 !imp_is_deactive(imp))
1057 /*XXX only recover for the initial connection */
1058 if (!lustre_handle_is_used(&imp->imp_remote_handle) &&
1059 imp->imp_state == LUSTRE_IMP_DISCON &&
1060 !imp_is_deactive(imp))
1062 ptlrpc_initiate_recovery(imp);
1063 else if (imp->imp_state != LUSTRE_IMP_FULL)
1064 CDEBUG(D_HA, "Refused to recover import %s->%s "
1065 "state %d, deactive %d\n",
1066 imp->imp_obd->obd_uuid.uuid,
1067 obd2cli_tgt(imp->imp_obd), imp->imp_state,
1068 imp_is_deactive(imp));
1073 #endif /* !__KERNEL__ */