1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
39 * lustre/ldlm/ldlm_lockd.c
41 * Author: Peter Braam <braam@clusterfs.com>
42 * Author: Phil Schwan <phil@clusterfs.com>
46 # define EXPORT_SYMTAB
48 #define DEBUG_SUBSYSTEM S_LDLM
51 # include <libcfs/libcfs.h>
53 # include <liblustre.h>
56 #include <lustre_dlm.h>
57 #include <obd_class.h>
58 #include <libcfs/list.h>
59 #include "ldlm_internal.h"
62 static int ldlm_num_threads;
63 CFS_MODULE_PARM(ldlm_num_threads, "i", int, 0444,
64 "number of DLM service threads to start");
67 extern cfs_mem_cache_t *ldlm_resource_slab;
68 extern cfs_mem_cache_t *ldlm_lock_slab;
69 static cfs_semaphore_t ldlm_ref_sem;
70 static int ldlm_refcount;
72 struct ldlm_cb_async_args {
73 struct ldlm_cb_set_arg *ca_set_arg;
74 struct ldlm_lock *ca_lock;
79 static struct ldlm_state *ldlm_state;
81 inline cfs_time_t round_timeout(cfs_time_t timeout)
83 return cfs_time_seconds((int)cfs_duration_sec(cfs_time_sub(timeout, 0)) + 1);
86 /* timeout for initial callback (AST) reply (bz10399) */
87 static inline unsigned int ldlm_get_rq_timeout(void)
90 unsigned int timeout = min(ldlm_timeout, obd_timeout / 3);
92 return timeout < 1 ? 1 : timeout;
96 /* w_l_spinlock protects both waiting_locks_list and expired_lock_thread */
97 static cfs_spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
98 static cfs_list_t waiting_locks_list;
99 static cfs_timer_t waiting_locks_timer;
101 static struct expired_lock_thread {
102 cfs_waitq_t elt_waitq;
105 cfs_list_t elt_expired_locks;
106 } expired_lock_thread;
109 #define ELT_STOPPED 0
111 #define ELT_TERMINATE 2
113 struct ldlm_bl_pool {
114 cfs_spinlock_t blp_lock;
117 * blp_prio_list is used for callbacks that should be handled
118 * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
121 cfs_list_t blp_prio_list;
124 * blp_list is used for all other callbacks which are likely
125 * to take longer to process.
129 cfs_waitq_t blp_waitq;
130 cfs_completion_t blp_comp;
131 cfs_atomic_t blp_num_threads;
132 cfs_atomic_t blp_busy_threads;
137 struct ldlm_bl_work_item {
138 cfs_list_t blwi_entry;
139 struct ldlm_namespace *blwi_ns;
140 struct ldlm_lock_desc blwi_ld;
141 struct ldlm_lock *blwi_lock;
142 cfs_list_t blwi_head;
144 cfs_completion_t blwi_comp;
146 int blwi_mem_pressure;
151 static inline int have_expired_locks(void)
156 cfs_spin_lock_bh(&waiting_locks_spinlock);
157 need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks);
158 cfs_spin_unlock_bh(&waiting_locks_spinlock);
163 static int expired_lock_main(void *arg)
165 cfs_list_t *expired = &expired_lock_thread.elt_expired_locks;
166 struct l_wait_info lwi = { 0 };
170 cfs_daemonize("ldlm_elt");
172 expired_lock_thread.elt_state = ELT_READY;
173 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
176 l_wait_event(expired_lock_thread.elt_waitq,
177 have_expired_locks() ||
178 expired_lock_thread.elt_state == ELT_TERMINATE,
181 cfs_spin_lock_bh(&waiting_locks_spinlock);
182 if (expired_lock_thread.elt_dump) {
183 cfs_spin_unlock_bh(&waiting_locks_spinlock);
185 /* from waiting_locks_callback, but not in timer */
186 libcfs_debug_dumplog();
187 libcfs_run_lbug_upcall(__FILE__,
188 "waiting_locks_callback",
189 expired_lock_thread.elt_dump);
191 cfs_spin_lock_bh(&waiting_locks_spinlock);
192 expired_lock_thread.elt_dump = 0;
197 while (!cfs_list_empty(expired)) {
198 struct obd_export *export;
199 struct ldlm_lock *lock;
201 lock = cfs_list_entry(expired->next, struct ldlm_lock,
203 if ((void *)lock < LP_POISON + CFS_PAGE_SIZE &&
204 (void *)lock >= LP_POISON) {
205 cfs_spin_unlock_bh(&waiting_locks_spinlock);
206 CERROR("free lock on elt list %p\n", lock);
209 cfs_list_del_init(&lock->l_pending_chain);
210 if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE &&
211 (void *)lock->l_export >= LP_POISON) {
212 CERROR("lock with free export on elt list %p\n",
214 lock->l_export = NULL;
215 LDLM_ERROR(lock, "free export");
216 /* release extra ref grabbed by
217 * ldlm_add_waiting_lock() or
218 * ldlm_failed_ast() */
219 LDLM_LOCK_RELEASE(lock);
222 export = class_export_lock_get(lock->l_export, lock);
223 cfs_spin_unlock_bh(&waiting_locks_spinlock);
226 class_fail_export(export);
227 class_export_lock_put(export, lock);
229 /* release extra ref grabbed by ldlm_add_waiting_lock()
230 * or ldlm_failed_ast() */
231 LDLM_LOCK_RELEASE(lock);
233 cfs_spin_lock_bh(&waiting_locks_spinlock);
235 cfs_spin_unlock_bh(&waiting_locks_spinlock);
237 if (do_dump && obd_dump_on_eviction) {
238 CERROR("dump the log upon eviction\n");
239 libcfs_debug_dumplog();
242 if (expired_lock_thread.elt_state == ELT_TERMINATE)
246 expired_lock_thread.elt_state = ELT_STOPPED;
247 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
251 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
254 * Check if there is a request in the export request list
255 * which prevents the lock canceling.
257 static int ldlm_lock_busy(struct ldlm_lock *lock)
259 struct ptlrpc_request *req;
263 if (lock->l_export == NULL)
266 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
267 cfs_list_for_each_entry(req, &lock->l_export->exp_queued_rpc,
269 if (req->rq_ops->hpreq_lock_match) {
270 match = req->rq_ops->hpreq_lock_match(req, lock);
275 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
279 /* This is called from within a timer interrupt and cannot schedule */
280 static void waiting_locks_callback(unsigned long unused)
282 struct ldlm_lock *lock;
285 cfs_spin_lock_bh(&waiting_locks_spinlock);
286 while (!cfs_list_empty(&waiting_locks_list)) {
287 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
289 if (cfs_time_after(lock->l_callback_timeout,
290 cfs_time_current()) ||
291 (lock->l_req_mode == LCK_GROUP))
294 if (ptlrpc_check_suspend()) {
295 /* there is a case when we talk to one mds, holding
296 * lock from another mds. this way we easily can get
297 * here, if second mds is being recovered. so, we
298 * suspend timeouts. bug 6019 */
300 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
301 lock->l_export->exp_client_uuid.uuid,
302 lock->l_export->exp_connection->c_remote_uuid.uuid,
303 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
305 cfs_list_del_init(&lock->l_pending_chain);
306 cfs_spin_unlock_bh(&waiting_locks_spinlock);
307 ldlm_add_waiting_lock(lock);
311 /* if timeout overlaps the activation time of suspended timeouts
312 * then extend it to give a chance for client to reconnect */
313 if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
314 cfs_time_seconds(obd_timeout)/2),
315 ptlrpc_suspend_wakeup_time())) {
316 LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
317 lock->l_export->exp_client_uuid.uuid,
318 lock->l_export->exp_connection->c_remote_uuid.uuid,
319 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
321 cfs_list_del_init(&lock->l_pending_chain);
322 cfs_spin_unlock_bh(&waiting_locks_spinlock);
323 ldlm_add_waiting_lock(lock);
327 /* Check if we need to prolong timeout */
328 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) &&
329 ldlm_lock_busy(lock)) {
332 if (lock->l_pending_chain.next == &waiting_locks_list)
337 cfs_spin_unlock_bh(&waiting_locks_spinlock);
338 LDLM_DEBUG(lock, "prolong the busy lock");
339 ldlm_refresh_waiting_lock(lock,
340 ldlm_get_enq_timeout(lock));
341 cfs_spin_lock_bh(&waiting_locks_spinlock);
344 LDLM_LOCK_RELEASE(lock);
348 LDLM_LOCK_RELEASE(lock);
351 ldlm_lock_to_ns(lock)->ns_timeouts++;
352 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
353 "evicting client at %s ",
354 cfs_time_current_sec()- lock->l_last_activity,
356 lock->l_export->exp_connection->c_peer.nid));
358 /* no needs to take an extra ref on the lock since it was in
359 * the waiting_locks_list and ldlm_add_waiting_lock()
360 * already grabbed a ref */
361 cfs_list_del(&lock->l_pending_chain);
362 cfs_list_add(&lock->l_pending_chain,
363 &expired_lock_thread.elt_expired_locks);
366 if (!cfs_list_empty(&expired_lock_thread.elt_expired_locks)) {
367 if (obd_dump_on_timeout)
368 expired_lock_thread.elt_dump = __LINE__;
370 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
374 * Make sure the timer will fire again if we have any locks
377 if (!cfs_list_empty(&waiting_locks_list)) {
378 cfs_time_t timeout_rounded;
379 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
381 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
382 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
384 cfs_spin_unlock_bh(&waiting_locks_spinlock);
388 * Indicate that we're waiting for a client to call us back cancelling a given
389 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
390 * timer to fire appropriately. (We round up to the next second, to avoid
391 * floods of timer firings during periods of high lock contention and traffic).
392 * As done by ldlm_add_waiting_lock(), the caller must grab a lock reference
393 * if it has been added to the waiting list (1 is returned).
395 * Called with the namespace lock held.
397 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds)
400 cfs_time_t timeout_rounded;
402 if (!cfs_list_empty(&lock->l_pending_chain))
405 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
406 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
409 timeout = cfs_time_shift(seconds);
410 if (likely(cfs_time_after(timeout, lock->l_callback_timeout)))
411 lock->l_callback_timeout = timeout;
413 timeout_rounded = round_timeout(lock->l_callback_timeout);
415 if (cfs_time_before(timeout_rounded,
416 cfs_timer_deadline(&waiting_locks_timer)) ||
417 !cfs_timer_is_armed(&waiting_locks_timer)) {
418 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
420 /* if the new lock has a shorter timeout than something earlier on
421 the list, we'll wait the longer amount of time; no big deal. */
423 cfs_list_add_tail(&lock->l_pending_chain, &waiting_locks_list);
427 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
430 int timeout = ldlm_get_enq_timeout(lock);
432 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
434 cfs_spin_lock_bh(&waiting_locks_spinlock);
435 if (lock->l_destroyed) {
436 static cfs_time_t next;
437 cfs_spin_unlock_bh(&waiting_locks_spinlock);
438 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
439 if (cfs_time_after(cfs_time_current(), next)) {
440 next = cfs_time_shift(14400);
441 libcfs_debug_dumpstack(NULL);
446 ret = __ldlm_add_waiting_lock(lock, timeout);
448 /* grab ref on the lock if it has been added to the
451 cfs_spin_unlock_bh(&waiting_locks_spinlock);
453 LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
454 ret == 0 ? "not re-" : "", timeout,
455 AT_OFF ? "off" : "on");
460 * Remove a lock from the pending list, likely because it had its cancellation
461 * callback arrive without incident. This adjusts the lock-timeout timer if
462 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
463 * As done by ldlm_del_waiting_lock(), the caller must release the lock
464 * reference when the lock is removed from any list (1 is returned).
466 * Called with namespace lock held.
468 static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
470 cfs_list_t *list_next;
472 if (cfs_list_empty(&lock->l_pending_chain))
475 list_next = lock->l_pending_chain.next;
476 if (lock->l_pending_chain.prev == &waiting_locks_list) {
477 /* Removing the head of the list, adjust timer. */
478 if (list_next == &waiting_locks_list) {
479 /* No more, just cancel. */
480 cfs_timer_disarm(&waiting_locks_timer);
482 struct ldlm_lock *next;
483 next = cfs_list_entry(list_next, struct ldlm_lock,
485 cfs_timer_arm(&waiting_locks_timer,
486 round_timeout(next->l_callback_timeout));
489 cfs_list_del_init(&lock->l_pending_chain);
494 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
498 if (lock->l_export == NULL) {
499 /* We don't have a "waiting locks list" on clients. */
500 CDEBUG(D_DLMTRACE, "Client lock %p : no-op\n", lock);
504 cfs_spin_lock_bh(&waiting_locks_spinlock);
505 ret = __ldlm_del_waiting_lock(lock);
506 cfs_spin_unlock_bh(&waiting_locks_spinlock);
508 /* release lock ref if it has indeed been removed
510 LDLM_LOCK_RELEASE(lock);
512 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
519 * Called with namespace lock held.
521 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
523 if (lock->l_export == NULL) {
524 /* We don't have a "waiting locks list" on clients. */
525 LDLM_DEBUG(lock, "client lock: no-op");
529 cfs_spin_lock_bh(&waiting_locks_spinlock);
531 if (cfs_list_empty(&lock->l_pending_chain)) {
532 cfs_spin_unlock_bh(&waiting_locks_spinlock);
533 LDLM_DEBUG(lock, "wasn't waiting");
537 /* we remove/add the lock to the waiting list, so no needs to
538 * release/take a lock reference */
539 __ldlm_del_waiting_lock(lock);
540 __ldlm_add_waiting_lock(lock, timeout);
541 cfs_spin_unlock_bh(&waiting_locks_spinlock);
543 LDLM_DEBUG(lock, "refreshed");
546 #else /* !__KERNEL__ */
548 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
550 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
554 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
559 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
563 #endif /* __KERNEL__ */
565 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
566 const char *ast_type)
568 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
569 "to a lock %s callback time out: rc %d\n",
570 lock->l_export->exp_obd->obd_name,
571 obd_export_nid2str(lock->l_export), ast_type, rc);
573 if (obd_dump_on_timeout)
574 libcfs_debug_dumplog();
576 cfs_spin_lock_bh(&waiting_locks_spinlock);
577 if (__ldlm_del_waiting_lock(lock) == 0)
578 /* the lock was not in any list, grab an extra ref before adding
579 * the lock to the expired list */
581 cfs_list_add(&lock->l_pending_chain,
582 &expired_lock_thread.elt_expired_locks);
583 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
584 cfs_spin_unlock_bh(&waiting_locks_spinlock);
586 class_fail_export(lock->l_export);
590 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
591 struct ptlrpc_request *req, int rc,
592 const char *ast_type)
594 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
596 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
597 LASSERT(lock->l_export);
598 if (lock->l_export->exp_libclient) {
599 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
600 " timeout, just cancelling lock", ast_type,
601 libcfs_nid2str(peer.nid));
602 ldlm_lock_cancel(lock);
604 } else if (lock->l_flags & LDLM_FL_CANCEL) {
605 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
606 "cancel was received (AST reply lost?)",
607 ast_type, libcfs_nid2str(peer.nid));
608 ldlm_lock_cancel(lock);
611 ldlm_del_waiting_lock(lock);
612 ldlm_failed_ast(lock, rc, ast_type);
616 struct ldlm_resource *res = lock->l_resource;
617 LDLM_DEBUG(lock, "client (nid %s) returned %d"
618 " from %s AST - normal race",
619 libcfs_nid2str(peer.nid),
621 lustre_msg_get_status(req->rq_repmsg) : -1,
624 /* update lvbo to return proper attributes.
626 ldlm_resource_getref(res);
627 ldlm_res_lvbo_update(res, NULL, 1);
628 ldlm_resource_putref(res);
632 LDLM_ERROR(lock, "client (nid %s) returned %d "
633 "from %s AST", libcfs_nid2str(peer.nid),
634 (req->rq_repmsg != NULL) ?
635 lustre_msg_get_status(req->rq_repmsg) : 0,
638 ldlm_lock_cancel(lock);
639 /* Server-side AST functions are called from ldlm_reprocess_all,
640 * which needs to be told to please restart its reprocessing. */
647 static int ldlm_cb_interpret(const struct lu_env *env,
648 struct ptlrpc_request *req, void *data, int rc)
650 struct ldlm_cb_async_args *ca = data;
651 struct ldlm_lock *lock = ca->ca_lock;
652 struct ldlm_cb_set_arg *arg = ca->ca_set_arg;
655 LASSERT(lock != NULL);
657 rc = ldlm_handle_ast_error(lock, req, rc,
658 arg->type == LDLM_BL_CALLBACK
659 ? "blocking" : "completion");
661 cfs_atomic_inc(&arg->restart);
663 LDLM_LOCK_RELEASE(lock);
665 if (cfs_atomic_dec_return(&arg->rpcs) < arg->threshold)
666 cfs_waitq_signal(&arg->waitq);
670 static inline int ldlm_bl_and_cp_ast_tail(struct ptlrpc_request *req,
671 struct ldlm_cb_set_arg *arg,
672 struct ldlm_lock *lock,
678 if (unlikely(instant_cancel)) {
679 rc = ptl_send_rpc(req, 1);
680 ptlrpc_req_finished(req);
682 cfs_atomic_inc(&arg->restart);
685 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
686 cfs_atomic_inc(&arg->rpcs);
693 * Check if there are requests in the export request list which prevent
694 * the lock canceling and make these requests high priority ones.
696 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
698 struct ptlrpc_request *req;
701 if (lock->l_export == NULL) {
702 LDLM_DEBUG(lock, "client lock: no-op");
706 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
707 cfs_list_for_each_entry(req, &lock->l_export->exp_queued_rpc,
709 /* Do not process requests that were not yet added to there
710 * incoming queue or were already removed from there for
712 if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
713 req->rq_ops->hpreq_lock_match &&
714 req->rq_ops->hpreq_lock_match(req, lock))
715 ptlrpc_hpreq_reorder(req);
717 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
722 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
723 * enqueued server lock conflicts with given one.
725 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
726 * to wait for client response.
728 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
729 struct ldlm_lock_desc *desc,
730 void *data, int flag)
732 struct ldlm_cb_async_args *ca;
733 struct ldlm_cb_set_arg *arg = data;
734 struct ldlm_request *body;
735 struct ptlrpc_request *req;
736 int instant_cancel = 0;
740 if (flag == LDLM_CB_CANCELING)
741 /* Don't need to do anything here. */
745 LASSERT(data != NULL);
746 if (lock->l_export->exp_obd->obd_recovering != 0) {
747 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
748 ldlm_lock_dump(D_ERROR, lock, 0);
751 ldlm_lock_reorder_req(lock);
753 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
754 &RQF_LDLM_BL_CALLBACK,
755 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
759 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
760 ca = ptlrpc_req_async_args(req);
761 ca->ca_set_arg = arg;
764 req->rq_interpret_reply = ldlm_cb_interpret;
765 req->rq_no_resend = 1;
767 lock_res(lock->l_resource);
768 if (lock->l_granted_mode != lock->l_req_mode) {
769 /* this blocking AST will be communicated as part of the
770 * completion AST instead */
771 unlock_res(lock->l_resource);
772 ptlrpc_req_finished(req);
773 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
777 if (lock->l_destroyed) {
778 /* What's the point? */
779 unlock_res(lock->l_resource);
780 ptlrpc_req_finished(req);
784 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
787 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
788 body->lock_handle[0] = lock->l_remote_handle;
789 body->lock_desc = *desc;
790 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
792 LDLM_DEBUG(lock, "server preparing blocking AST");
794 ptlrpc_request_set_replen(req);
795 if (instant_cancel) {
796 unlock_res(lock->l_resource);
797 ldlm_lock_cancel(lock);
799 LASSERT(lock->l_granted_mode == lock->l_req_mode);
800 ldlm_add_waiting_lock(lock);
801 unlock_res(lock->l_resource);
804 req->rq_send_state = LUSTRE_IMP_FULL;
805 /* ptlrpc_request_alloc_pack already set timeout */
807 req->rq_timeout = ldlm_get_rq_timeout();
809 if (lock->l_export && lock->l_export->exp_nid_stats &&
810 lock->l_export->exp_nid_stats->nid_ldlm_stats)
811 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
812 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
814 rc = ldlm_bl_and_cp_ast_tail(req, arg, lock, instant_cancel);
819 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
821 struct ldlm_cb_set_arg *arg = data;
822 struct ldlm_request *body;
823 struct ptlrpc_request *req;
824 struct ldlm_cb_async_args *ca;
825 long total_enqueue_wait;
826 int instant_cancel = 0;
830 LASSERT(lock != NULL);
831 LASSERT(data != NULL);
833 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
834 lock->l_last_activity);
836 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
837 &RQF_LDLM_CP_CALLBACK);
841 /* server namespace, doesn't need lock */
842 if (lock->l_resource->lr_lvb_len) {
843 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
844 lock->l_resource->lr_lvb_len);
847 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
849 ptlrpc_request_free(req);
853 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
854 ca = ptlrpc_req_async_args(req);
855 ca->ca_set_arg = arg;
858 req->rq_interpret_reply = ldlm_cb_interpret;
859 req->rq_no_resend = 1;
860 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
862 body->lock_handle[0] = lock->l_remote_handle;
863 body->lock_flags = flags;
864 ldlm_lock2desc(lock, &body->lock_desc);
865 if (lock->l_resource->lr_lvb_len) {
866 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
868 lock_res(lock->l_resource);
869 memcpy(lvb, lock->l_resource->lr_lvb_data,
870 lock->l_resource->lr_lvb_len);
871 unlock_res(lock->l_resource);
874 LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)",
877 /* Server-side enqueue wait time estimate, used in
878 __ldlm_add_waiting_lock to set future enqueue timers */
879 if (total_enqueue_wait < ldlm_get_enq_timeout(lock))
880 at_measured(ldlm_lock_to_ns_at(lock),
883 /* bz18618. Don't add lock enqueue time we spend waiting for a
884 previous callback to fail. Locks waiting legitimately will
885 get extended by ldlm_refresh_waiting_lock regardless of the
886 estimate, so it's okay to underestimate here. */
887 LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. "
888 "It is likely that a previous callback timed out.",
890 at_get(ldlm_lock_to_ns_at(lock)));
892 ptlrpc_request_set_replen(req);
894 req->rq_send_state = LUSTRE_IMP_FULL;
895 /* ptlrpc_request_pack already set timeout */
897 req->rq_timeout = ldlm_get_rq_timeout();
899 /* We only send real blocking ASTs after the lock is granted */
900 lock_res_and_lock(lock);
901 if (lock->l_flags & LDLM_FL_AST_SENT) {
902 body->lock_flags |= LDLM_FL_AST_SENT;
903 /* copy ast flags like LDLM_FL_DISCARD_DATA */
904 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
906 /* We might get here prior to ldlm_handle_enqueue setting
907 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
908 * into waiting list, but this is safe and similar code in
909 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
910 * that would not only cancel the lock, but will also remove
911 * it from waiting list */
912 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
913 unlock_res_and_lock(lock);
914 ldlm_lock_cancel(lock);
916 lock_res_and_lock(lock);
918 /* start the lock-timeout clock */
919 ldlm_add_waiting_lock(lock);
922 unlock_res_and_lock(lock);
924 if (lock->l_export && lock->l_export->exp_nid_stats &&
925 lock->l_export->exp_nid_stats->nid_ldlm_stats)
926 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
927 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
929 rc = ldlm_bl_and_cp_ast_tail(req, arg, lock, instant_cancel);
934 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
936 struct ldlm_resource *res = lock->l_resource;
937 struct ldlm_request *body;
938 struct ptlrpc_request *req;
942 LASSERT(lock != NULL);
944 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
945 &RQF_LDLM_GL_CALLBACK,
946 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
951 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
952 body->lock_handle[0] = lock->l_remote_handle;
953 ldlm_lock2desc(lock, &body->lock_desc);
955 /* server namespace, doesn't need lock */
956 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
957 lock->l_resource->lr_lvb_len);
958 res = lock->l_resource;
959 ptlrpc_request_set_replen(req);
962 req->rq_send_state = LUSTRE_IMP_FULL;
963 /* ptlrpc_request_alloc_pack already set timeout */
965 req->rq_timeout = ldlm_get_rq_timeout();
967 if (lock->l_export && lock->l_export->exp_nid_stats &&
968 lock->l_export->exp_nid_stats->nid_ldlm_stats)
969 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
970 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
972 rc = ptlrpc_queue_wait(req);
973 /* Update the LVB from disk if the AST failed (this is a legal race)
975 * - Glimpse callback of local lock just return -ELDLM_NO_LOCK_DATA.
976 * - Glimpse callback of remote lock might return -ELDLM_NO_LOCK_DATA
977 * when inode is cleared. LU-274
979 if (rc == -ELDLM_NO_LOCK_DATA) {
980 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
981 ldlm_res_lvbo_update(res, NULL, 1);
982 } else if (rc != 0) {
983 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
985 rc = ldlm_res_lvbo_update(res, req, 1);
988 ptlrpc_req_finished(req);
990 ldlm_reprocess_all(res);
996 extern unsigned long long lu_time_stamp_get(void);
998 #define lu_time_stamp_get() time(NULL)
1001 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
1002 struct lprocfs_stats *srv_stats)
1004 int lock_type = 0, op = 0;
1006 lock_type = dlm_req->lock_desc.l_resource.lr_type;
1008 switch (lock_type) {
1010 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
1013 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
1014 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
1016 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
1019 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
1022 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
1030 lprocfs_counter_incr(srv_stats, op);
1036 * Main server-side entry point into LDLM. This is called by ptlrpc service
1037 * threads to carry out client lock enqueueing requests.
1039 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1040 struct ptlrpc_request *req,
1041 const struct ldlm_request *dlm_req,
1042 const struct ldlm_callback_suite *cbs)
1044 struct ldlm_reply *dlm_rep;
1046 ldlm_error_t err = ELDLM_OK;
1047 struct ldlm_lock *lock = NULL;
1048 void *cookie = NULL;
1052 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1054 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1055 flags = dlm_req->lock_flags;
1057 LASSERT(req->rq_export);
1059 if (req->rq_rqbd->rqbd_service->srv_stats)
1060 ldlm_svc_get_eopc(dlm_req,
1061 req->rq_rqbd->rqbd_service->srv_stats);
1063 if (req->rq_export && req->rq_export->exp_nid_stats &&
1064 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1065 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1066 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1068 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1069 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1070 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1071 dlm_req->lock_desc.l_resource.lr_type);
1072 GOTO(out, rc = -EFAULT);
1075 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1076 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1077 dlm_req->lock_desc.l_req_mode &
1078 (dlm_req->lock_desc.l_req_mode-1))) {
1079 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1080 dlm_req->lock_desc.l_req_mode);
1081 GOTO(out, rc = -EFAULT);
1084 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1085 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1087 DEBUG_REQ(D_ERROR, req,
1088 "PLAIN lock request from IBITS client?");
1089 GOTO(out, rc = -EPROTO);
1091 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1093 DEBUG_REQ(D_ERROR, req,
1094 "IBITS lock request from unaware client?");
1095 GOTO(out, rc = -EPROTO);
1099 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1100 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1101 ibits for mgc/mgs) */
1103 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1104 * inodebits lock if client does not support them. */
1105 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1106 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1107 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1108 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1109 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1110 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1111 dlm_req->lock_desc.l_req_mode = LCK_CR;
1115 if (unlikely(flags & LDLM_FL_REPLAY)) {
1116 /* Find an existing lock in the per-export lock hash */
1117 lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
1118 (void *)&dlm_req->lock_handle[0]);
1120 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1121 LPX64, lock->l_handle.h_cookie);
1122 GOTO(existing_lock, rc = 0);
1126 /* The lock's callback data might be set in the policy function */
1127 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1128 dlm_req->lock_desc.l_resource.lr_type,
1129 dlm_req->lock_desc.l_req_mode,
1133 GOTO(out, rc = -ENOMEM);
1135 lock->l_last_activity = cfs_time_current_sec();
1136 lock->l_remote_handle = dlm_req->lock_handle[0];
1137 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1139 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1140 /* Don't enqueue a lock onto the export if it is been disonnected
1141 * due to eviction (bug 3822) or server umount (bug 24324).
1142 * Cancel it now instead. */
1143 if (req->rq_export->exp_disconnected) {
1144 LDLM_ERROR(lock, "lock on disconnected export %p",
1146 GOTO(out, rc = -ENOTCONN);
1149 lock->l_export = class_export_lock_get(req->rq_export, lock);
1150 if (lock->l_export->exp_lock_hash)
1151 cfs_hash_add(lock->l_export->exp_lock_hash,
1152 &lock->l_remote_handle,
1157 if (flags & LDLM_FL_HAS_INTENT) {
1158 /* In this case, the reply buffer is allocated deep in
1159 * local_lock_enqueue by the policy function. */
1162 /* based on the assumption that lvb size never changes during
1163 * resource life time otherwise it need resource->lr_lock's
1165 if (lock->l_resource->lr_lvb_len) {
1166 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1168 lock->l_resource->lr_lvb_len);
1171 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1172 GOTO(out, rc = -ENOMEM);
1174 rc = req_capsule_server_pack(&req->rq_pill);
1179 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1180 ldlm_convert_policy_to_local(
1181 dlm_req->lock_desc.l_resource.lr_type,
1182 &dlm_req->lock_desc.l_policy_data,
1183 &lock->l_policy_data);
1184 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1185 lock->l_req_extent = lock->l_policy_data.l_extent;
1187 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1191 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1192 dlm_rep->lock_flags = flags;
1194 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1195 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1197 /* We never send a blocking AST until the lock is granted, but
1198 * we can tell it right now */
1199 lock_res_and_lock(lock);
1201 /* Now take into account flags to be inherited from original lock
1202 request both in reply to client and in our own lock flags. */
1203 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1204 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1206 /* Don't move a pending lock onto the export if it has already been
1207 * disconnected due to eviction (bug 5683) or server umount (bug 24324).
1208 * Cancel it now instead. */
1209 if (unlikely(req->rq_export->exp_disconnected ||
1210 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1211 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1213 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1214 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1215 if (lock->l_granted_mode == lock->l_req_mode) {
1217 * Only cancel lock if it was granted, because it would
1218 * be destroyed immediately and would never be granted
1219 * in the future, causing timeouts on client. Not
1220 * granted lock will be cancelled immediately after
1221 * sending completion AST.
1223 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1224 unlock_res_and_lock(lock);
1225 ldlm_lock_cancel(lock);
1226 lock_res_and_lock(lock);
1228 ldlm_add_waiting_lock(lock);
1231 /* Make sure we never ever grant usual metadata locks to liblustre
1233 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1234 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1235 req->rq_export->exp_libclient) {
1236 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1237 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1238 CERROR("Granting sync lock to libclient. "
1239 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1240 dlm_req->lock_flags, dlm_rep->lock_flags,
1242 LDLM_ERROR(lock, "sync lock");
1243 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1244 struct ldlm_intent *it;
1246 it = req_capsule_client_get(&req->rq_pill,
1249 CERROR("This is intent %s ("LPU64")\n",
1250 ldlm_it2str(it->opc), it->opc);
1256 unlock_res_and_lock(lock);
1260 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1261 if (!req->rq_packed_final) {
1262 err = lustre_pack_reply(req, 1, NULL, NULL);
1267 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1268 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1270 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1271 "(err=%d, rc=%d)", err, rc);
1274 if (lock->l_resource->lr_lvb_len > 0) {
1275 /* MDT path won't handle lr_lvb_data, so
1276 * lock/unlock better be contained in the
1280 lvb = req_capsule_server_get(&req->rq_pill,
1282 LASSERTF(lvb != NULL, "req %p, lock %p\n",
1284 lock_res(lock->l_resource);
1285 memcpy(lvb, lock->l_resource->lr_lvb_data,
1286 lock->l_resource->lr_lvb_len);
1287 unlock_res(lock->l_resource);
1290 lock_res_and_lock(lock);
1291 ldlm_resource_unlink_lock(lock);
1292 ldlm_lock_destroy_nolock(lock);
1293 unlock_res_and_lock(lock);
1296 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1297 ldlm_reprocess_all(lock->l_resource);
1299 LDLM_LOCK_RELEASE(lock);
1302 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1308 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1309 ldlm_completion_callback completion_callback,
1310 ldlm_blocking_callback blocking_callback,
1311 ldlm_glimpse_callback glimpse_callback)
1313 struct ldlm_request *dlm_req;
1314 struct ldlm_callback_suite cbs = {
1315 .lcs_completion = completion_callback,
1316 .lcs_blocking = blocking_callback,
1317 .lcs_glimpse = glimpse_callback
1321 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1322 if (dlm_req != NULL) {
1323 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1324 req, dlm_req, &cbs);
1331 int ldlm_handle_convert0(struct ptlrpc_request *req,
1332 const struct ldlm_request *dlm_req)
1334 struct ldlm_reply *dlm_rep;
1335 struct ldlm_lock *lock;
1339 if (req->rq_export && req->rq_export->exp_nid_stats &&
1340 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1341 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1342 LDLM_CONVERT - LDLM_FIRST_OPC);
1344 rc = req_capsule_server_pack(&req->rq_pill);
1348 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1349 dlm_rep->lock_flags = dlm_req->lock_flags;
1351 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1353 req->rq_status = EINVAL;
1357 LDLM_DEBUG(lock, "server-side convert handler START");
1359 lock->l_last_activity = cfs_time_current_sec();
1360 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1361 &dlm_rep->lock_flags);
1363 if (ldlm_del_waiting_lock(lock))
1364 LDLM_DEBUG(lock, "converted waiting lock");
1367 req->rq_status = EDEADLOCK;
1372 if (!req->rq_status)
1373 ldlm_reprocess_all(lock->l_resource);
1374 LDLM_DEBUG(lock, "server-side convert handler END");
1375 LDLM_LOCK_PUT(lock);
1377 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1382 int ldlm_handle_convert(struct ptlrpc_request *req)
1385 struct ldlm_request *dlm_req;
1387 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1388 if (dlm_req != NULL) {
1389 rc = ldlm_handle_convert0(req, dlm_req);
1391 CERROR ("Can't unpack dlm_req\n");
1397 /* Cancel all the locks whos handles are packed into ldlm_request */
1398 int ldlm_request_cancel(struct ptlrpc_request *req,
1399 const struct ldlm_request *dlm_req, int first)
1401 struct ldlm_resource *res, *pres = NULL;
1402 struct ldlm_lock *lock;
1403 int i, count, done = 0;
1406 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1410 /* There is no lock on the server at the replay time,
1411 * skip lock cancelling to make replay tests to pass. */
1412 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1415 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1416 "starting at %d", count, first);
1418 for (i = first; i < count; i++) {
1419 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1421 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1422 "lock (cookie "LPU64")",
1423 dlm_req->lock_handle[i].cookie);
1427 res = lock->l_resource;
1432 ldlm_reprocess_all(pres);
1433 LDLM_RESOURCE_DELREF(pres);
1434 ldlm_resource_putref(pres);
1437 ldlm_resource_getref(res);
1438 LDLM_RESOURCE_ADDREF(res);
1439 ldlm_res_lvbo_update(res, NULL, 1);
1443 ldlm_lock_cancel(lock);
1444 LDLM_LOCK_PUT(lock);
1447 ldlm_reprocess_all(pres);
1448 LDLM_RESOURCE_DELREF(pres);
1449 ldlm_resource_putref(pres);
1451 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1455 int ldlm_handle_cancel(struct ptlrpc_request *req)
1457 struct ldlm_request *dlm_req;
1461 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1462 if (dlm_req == NULL) {
1463 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1467 if (req->rq_export && req->rq_export->exp_nid_stats &&
1468 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1469 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1470 LDLM_CANCEL - LDLM_FIRST_OPC);
1472 rc = req_capsule_server_pack(&req->rq_pill);
1476 if (!ldlm_request_cancel(req, dlm_req, 0))
1477 req->rq_status = ESTALE;
1479 RETURN(ptlrpc_reply(req));
1482 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1483 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1488 LDLM_DEBUG(lock, "client blocking AST callback handler");
1490 lock_res_and_lock(lock);
1491 lock->l_flags |= LDLM_FL_CBPENDING;
1493 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1494 lock->l_flags |= LDLM_FL_CANCEL;
1496 do_ast = (!lock->l_readers && !lock->l_writers);
1497 unlock_res_and_lock(lock);
1500 CDEBUG(D_DLMTRACE, "Lock %p already unused, calling callback (%p)\n",
1501 lock, lock->l_blocking_ast);
1502 if (lock->l_blocking_ast != NULL)
1503 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1506 CDEBUG(D_DLMTRACE, "Lock %p is referenced, will be cancelled later\n",
1510 LDLM_DEBUG(lock, "client blocking callback handler END");
1511 LDLM_LOCK_RELEASE(lock);
1515 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1516 struct ldlm_namespace *ns,
1517 struct ldlm_request *dlm_req,
1518 struct ldlm_lock *lock)
1520 CFS_LIST_HEAD(ast_list);
1523 LDLM_DEBUG(lock, "client completion callback handler START");
1525 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1526 int to = cfs_time_seconds(1);
1528 cfs_schedule_timeout_and_set_state(
1529 CFS_TASK_INTERRUPTIBLE, to);
1530 if (lock->l_granted_mode == lock->l_req_mode ||
1536 lock_res_and_lock(lock);
1537 if (lock->l_destroyed ||
1538 lock->l_granted_mode == lock->l_req_mode) {
1539 /* bug 11300: the lock has already been granted */
1540 unlock_res_and_lock(lock);
1541 LDLM_DEBUG(lock, "Double grant race happened");
1542 LDLM_LOCK_RELEASE(lock);
1547 /* If we receive the completion AST before the actual enqueue returned,
1548 * then we might need to switch lock modes, resources, or extents. */
1549 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1550 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1551 LDLM_DEBUG(lock, "completion AST, new lock mode");
1554 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1555 ldlm_convert_policy_to_local(
1556 dlm_req->lock_desc.l_resource.lr_type,
1557 &dlm_req->lock_desc.l_policy_data,
1558 &lock->l_policy_data);
1559 LDLM_DEBUG(lock, "completion AST, new policy data");
1562 ldlm_resource_unlink_lock(lock);
1563 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1564 &lock->l_resource->lr_name,
1565 sizeof(lock->l_resource->lr_name)) != 0) {
1566 unlock_res_and_lock(lock);
1567 if (ldlm_lock_change_resource(ns, lock,
1568 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1569 LDLM_ERROR(lock, "Failed to allocate resource");
1570 LDLM_LOCK_RELEASE(lock);
1574 LDLM_DEBUG(lock, "completion AST, new resource");
1575 CERROR("change resource!\n");
1576 lock_res_and_lock(lock);
1579 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1580 /* BL_AST locks are not needed in lru.
1581 * let ldlm_cancel_lru() be fast. */
1582 ldlm_lock_remove_from_lru(lock);
1583 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1584 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1587 if (lock->l_lvb_len) {
1588 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1589 RCL_CLIENT) < lock->l_lvb_len) {
1590 LDLM_ERROR(lock, "completion AST did not contain "
1593 void *lvb = req_capsule_client_get(&req->rq_pill,
1595 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1599 ldlm_grant_lock(lock, &ast_list);
1600 unlock_res_and_lock(lock);
1602 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1604 /* Let Enqueue to call osc_lock_upcall() and initialize
1606 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2);
1608 ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST);
1610 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1612 LDLM_LOCK_RELEASE(lock);
1616 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1617 struct ldlm_namespace *ns,
1618 struct ldlm_request *dlm_req,
1619 struct ldlm_lock *lock)
1624 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1626 if (lock->l_glimpse_ast != NULL)
1627 rc = lock->l_glimpse_ast(lock, req);
1629 if (req->rq_repmsg != NULL) {
1632 req->rq_status = rc;
1636 lock_res_and_lock(lock);
1637 if (lock->l_granted_mode == LCK_PW &&
1638 !lock->l_readers && !lock->l_writers &&
1639 cfs_time_after(cfs_time_current(),
1640 cfs_time_add(lock->l_last_used,
1641 cfs_time_seconds(10)))) {
1642 unlock_res_and_lock(lock);
1643 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1644 ldlm_handle_bl_callback(ns, NULL, lock);
1649 unlock_res_and_lock(lock);
1650 LDLM_LOCK_RELEASE(lock);
1654 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1656 if (req->rq_no_reply)
1659 req->rq_status = rc;
1660 if (!req->rq_packed_final) {
1661 rc = lustre_pack_reply(req, 1, NULL, NULL);
1665 return ptlrpc_reply(req);
1669 static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
1671 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1674 cfs_spin_lock(&blp->blp_lock);
1675 if (blwi->blwi_lock && blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
1676 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1677 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1679 /* other blocking callbacks are added to the regular list */
1680 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1682 cfs_spin_unlock(&blp->blp_lock);
1684 cfs_waitq_signal(&blp->blp_waitq);
1686 /* can not use blwi->blwi_mode as blwi could be already freed in
1688 if (mode == LDLM_SYNC)
1689 cfs_wait_for_completion(&blwi->blwi_comp);
1694 static inline void init_blwi(struct ldlm_bl_work_item *blwi,
1695 struct ldlm_namespace *ns,
1696 struct ldlm_lock_desc *ld,
1697 cfs_list_t *cancels, int count,
1698 struct ldlm_lock *lock,
1701 cfs_init_completion(&blwi->blwi_comp);
1702 CFS_INIT_LIST_HEAD(&blwi->blwi_head);
1704 if (cfs_memory_pressure_get())
1705 blwi->blwi_mem_pressure = 1;
1708 blwi->blwi_mode = mode;
1710 blwi->blwi_ld = *ld;
1712 cfs_list_add(&blwi->blwi_head, cancels);
1713 cfs_list_del_init(cancels);
1714 blwi->blwi_count = count;
1716 blwi->blwi_lock = lock;
1720 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1721 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1722 cfs_list_t *cancels, int count, int mode)
1726 if (cancels && count == 0)
1729 if (mode == LDLM_SYNC) {
1730 /* if it is synchronous call do minimum mem alloc, as it could
1731 * be triggered from kernel shrinker
1733 struct ldlm_bl_work_item blwi;
1734 memset(&blwi, 0, sizeof(blwi));
1735 init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
1736 RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
1738 struct ldlm_bl_work_item *blwi;
1739 OBD_ALLOC(blwi, sizeof(*blwi));
1742 init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
1744 RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
1750 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1751 struct ldlm_lock *lock)
1754 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
1760 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1761 cfs_list_t *cancels, int count, int mode)
1764 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
1770 /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
1771 static int ldlm_handle_setinfo(struct ptlrpc_request *req)
1773 struct obd_device *obd = req->rq_export->exp_obd;
1780 DEBUG_REQ(D_HSM, req, "%s: handle setinfo\n", obd->obd_name);
1782 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
1784 key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1786 DEBUG_REQ(D_IOCTL, req, "no set_info key");
1789 keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1791 val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1793 DEBUG_REQ(D_IOCTL, req, "no set_info val");
1796 vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1799 /* We are responsible for swabbing contents of val */
1801 if (KEY_IS(KEY_HSM_COPYTOOL_SEND))
1802 /* Pass it on to mdc (the "export" in this case) */
1803 rc = obd_set_info_async(req->rq_export,
1804 sizeof(KEY_HSM_COPYTOOL_SEND),
1805 KEY_HSM_COPYTOOL_SEND,
1808 DEBUG_REQ(D_WARNING, req, "ignoring unknown key %s", key);
1813 static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
1814 const char *msg, int rc,
1815 struct lustre_handle *handle)
1817 DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
1818 "%s: [nid %s] [rc %d] [lock "LPX64"]",
1819 msg, libcfs_id2str(req->rq_peer), rc,
1820 handle ? handle->cookie : 0);
1821 if (req->rq_no_reply)
1822 CWARN("No reply was sent, maybe cause bug 21636.\n");
1824 CWARN("Send reply failed, maybe cause bug 21636.\n");
1827 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1828 static int ldlm_callback_handler(struct ptlrpc_request *req)
1830 struct ldlm_namespace *ns;
1831 struct ldlm_request *dlm_req;
1832 struct ldlm_lock *lock;
1836 /* Requests arrive in sender's byte order. The ptlrpc service
1837 * handler has already checked and, if necessary, byte-swapped the
1838 * incoming request message body, but I am responsible for the
1839 * message buffers. */
1841 /* do nothing for sec context finalize */
1842 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1845 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1847 if (req->rq_export == NULL) {
1848 rc = ldlm_callback_reply(req, -ENOTCONN);
1849 ldlm_callback_errmsg(req, "Operate on unconnected server",
1854 LASSERT(req->rq_export != NULL);
1855 LASSERT(req->rq_export->exp_obd != NULL);
1857 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1858 case LDLM_BL_CALLBACK:
1859 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1862 case LDLM_CP_CALLBACK:
1863 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1866 case LDLM_GL_CALLBACK:
1867 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1871 rc = ldlm_handle_setinfo(req);
1872 ldlm_callback_reply(req, rc);
1874 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1875 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
1876 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1877 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1879 rc = llog_origin_handle_cancel(req);
1880 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1882 ldlm_callback_reply(req, rc);
1884 case OBD_QC_CALLBACK:
1885 req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
1886 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
1888 rc = target_handle_qc_callback(req);
1889 ldlm_callback_reply(req, rc);
1893 /* reply in handler */
1894 req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
1895 rc = target_handle_dqacq_callback(req);
1897 case LLOG_ORIGIN_HANDLE_CREATE:
1898 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1899 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1901 rc = llog_origin_handle_create(req);
1902 ldlm_callback_reply(req, rc);
1904 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1905 req_capsule_set(&req->rq_pill,
1906 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1907 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1909 rc = llog_origin_handle_next_block(req);
1910 ldlm_callback_reply(req, rc);
1912 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1913 req_capsule_set(&req->rq_pill,
1914 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1915 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1917 rc = llog_origin_handle_read_header(req);
1918 ldlm_callback_reply(req, rc);
1920 case LLOG_ORIGIN_HANDLE_CLOSE:
1921 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1923 rc = llog_origin_handle_close(req);
1924 ldlm_callback_reply(req, rc);
1927 CERROR("unknown opcode %u\n",
1928 lustre_msg_get_opc(req->rq_reqmsg));
1929 ldlm_callback_reply(req, -EPROTO);
1933 ns = req->rq_export->exp_obd->obd_namespace;
1934 LASSERT(ns != NULL);
1936 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1938 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1939 if (dlm_req == NULL) {
1940 rc = ldlm_callback_reply(req, -EPROTO);
1941 ldlm_callback_errmsg(req, "Operate without parameter", rc,
1946 /* Force a known safe race, send a cancel to the server for a lock
1947 * which the server has already started a blocking callback on. */
1948 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
1949 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1950 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
1952 CERROR("ldlm_cli_cancel: %d\n", rc);
1955 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
1957 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
1958 "disappeared\n", dlm_req->lock_handle[0].cookie);
1959 rc = ldlm_callback_reply(req, -EINVAL);
1960 ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
1961 &dlm_req->lock_handle[0]);
1965 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
1966 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
1967 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
1969 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1970 lock_res_and_lock(lock);
1971 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1972 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1973 /* If somebody cancels lock and cache is already dropped,
1974 * or lock is failed before cp_ast received on client,
1975 * we can tell the server we have no lock. Otherwise, we
1976 * should send cancel after dropping the cache. */
1977 if (((lock->l_flags & LDLM_FL_CANCELING) &&
1978 (lock->l_flags & LDLM_FL_BL_DONE)) ||
1979 (lock->l_flags & LDLM_FL_FAILED)) {
1980 LDLM_DEBUG(lock, "callback on lock "
1981 LPX64" - lock disappeared\n",
1982 dlm_req->lock_handle[0].cookie);
1983 unlock_res_and_lock(lock);
1984 LDLM_LOCK_RELEASE(lock);
1985 rc = ldlm_callback_reply(req, -EINVAL);
1986 ldlm_callback_errmsg(req, "Operate on stale lock", rc,
1987 &dlm_req->lock_handle[0]);
1990 /* BL_AST locks are not needed in lru.
1991 * let ldlm_cancel_lru() be fast. */
1992 ldlm_lock_remove_from_lru(lock);
1993 lock->l_flags |= LDLM_FL_BL_AST;
1995 unlock_res_and_lock(lock);
1997 /* We want the ost thread to get this reply so that it can respond
1998 * to ost requests (write cache writeback) that might be triggered
2001 * But we'd also like to be able to indicate in the reply that we're
2002 * cancelling right now, because it's unused, or have an intent result
2003 * in the reply, so we might have to push the responsibility for sending
2004 * the reply down into the AST handlers, alas. */
2006 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2007 case LDLM_BL_CALLBACK:
2008 CDEBUG(D_INODE, "blocking ast\n");
2009 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
2010 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
2011 rc = ldlm_callback_reply(req, 0);
2012 if (req->rq_no_reply || rc)
2013 ldlm_callback_errmsg(req, "Normal process", rc,
2014 &dlm_req->lock_handle[0]);
2016 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
2017 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
2019 case LDLM_CP_CALLBACK:
2020 CDEBUG(D_INODE, "completion ast\n");
2021 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
2022 ldlm_callback_reply(req, 0);
2023 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
2025 case LDLM_GL_CALLBACK:
2026 CDEBUG(D_INODE, "glimpse ast\n");
2027 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
2028 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
2031 LBUG(); /* checked above */
2037 static int ldlm_cancel_handler(struct ptlrpc_request *req)
2042 /* Requests arrive in sender's byte order. The ptlrpc service
2043 * handler has already checked and, if necessary, byte-swapped the
2044 * incoming request message body, but I am responsible for the
2045 * message buffers. */
2047 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2049 if (req->rq_export == NULL) {
2050 struct ldlm_request *dlm_req;
2052 CERROR("%s from %s arrived at %lu with bad export cookie "
2054 ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
2055 libcfs_nid2str(req->rq_peer.nid),
2056 req->rq_arrival_time.tv_sec,
2057 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
2059 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_CANCEL) {
2060 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2061 dlm_req = req_capsule_client_get(&req->rq_pill,
2063 if (dlm_req != NULL)
2064 ldlm_lock_dump_handle(D_ERROR,
2065 &dlm_req->lock_handle[0]);
2067 ldlm_callback_reply(req, -ENOTCONN);
2071 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2073 /* XXX FIXME move this back to mds/handler.c, bug 249 */
2075 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2076 CDEBUG(D_INODE, "cancel\n");
2077 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
2079 rc = ldlm_handle_cancel(req);
2083 case OBD_LOG_CANCEL:
2084 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2085 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2087 rc = llog_origin_handle_cancel(req);
2088 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2090 ldlm_callback_reply(req, rc);
2093 CERROR("invalid opcode %d\n",
2094 lustre_msg_get_opc(req->rq_reqmsg));
2095 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2096 ldlm_callback_reply(req, -EINVAL);
2102 int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2103 cfs_hlist_node_t *hnode, void *data)
2106 cfs_list_t *rpc_list = data;
2107 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2109 lock_res_and_lock(lock);
2111 if (lock->l_req_mode != lock->l_granted_mode) {
2112 unlock_res_and_lock(lock);
2116 LASSERT(lock->l_resource);
2117 if (lock->l_resource->lr_type != LDLM_IBITS &&
2118 lock->l_resource->lr_type != LDLM_PLAIN) {
2119 unlock_res_and_lock(lock);
2123 if (lock->l_flags & LDLM_FL_AST_SENT) {
2124 unlock_res_and_lock(lock);
2128 LASSERT(lock->l_blocking_ast);
2129 LASSERT(!lock->l_blocking_lock);
2131 lock->l_flags |= LDLM_FL_AST_SENT;
2132 if (lock->l_export && lock->l_export->exp_lock_hash &&
2133 !cfs_hlist_unhashed(&lock->l_exp_hash))
2134 cfs_hash_del(lock->l_export->exp_lock_hash,
2135 &lock->l_remote_handle, &lock->l_exp_hash);
2136 cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
2137 LDLM_LOCK_GET(lock);
2139 unlock_res_and_lock(lock);
2143 void ldlm_revoke_export_locks(struct obd_export *exp)
2145 cfs_list_t rpc_list;
2148 CFS_INIT_LIST_HEAD(&rpc_list);
2149 cfs_hash_for_each_empty(exp->exp_lock_hash,
2150 ldlm_revoke_lock_cb, &rpc_list);
2151 ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
2152 LDLM_WORK_REVOKE_AST);
2158 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
2160 struct ldlm_bl_work_item *blwi = NULL;
2161 static unsigned int num_bl = 0;
2163 cfs_spin_lock(&blp->blp_lock);
2164 /* process a request from the blp_list at least every blp_num_threads */
2165 if (!cfs_list_empty(&blp->blp_list) &&
2166 (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
2167 blwi = cfs_list_entry(blp->blp_list.next,
2168 struct ldlm_bl_work_item, blwi_entry);
2170 if (!cfs_list_empty(&blp->blp_prio_list))
2171 blwi = cfs_list_entry(blp->blp_prio_list.next,
2172 struct ldlm_bl_work_item,
2176 if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
2178 cfs_list_del(&blwi->blwi_entry);
2180 cfs_spin_unlock(&blp->blp_lock);
2185 /* This only contains temporary data until the thread starts */
2186 struct ldlm_bl_thread_data {
2187 char bltd_name[CFS_CURPROC_COMM_MAX];
2188 struct ldlm_bl_pool *bltd_blp;
2189 cfs_completion_t bltd_comp;
2193 static int ldlm_bl_thread_main(void *arg);
2195 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2197 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2200 cfs_init_completion(&bltd.bltd_comp);
2201 rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
2203 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2204 cfs_atomic_read(&blp->blp_num_threads), rc);
2207 cfs_wait_for_completion(&bltd.bltd_comp);
2212 static int ldlm_bl_thread_main(void *arg)
2214 struct ldlm_bl_pool *blp;
2218 struct ldlm_bl_thread_data *bltd = arg;
2220 blp = bltd->bltd_blp;
2223 cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
2224 cfs_atomic_inc(&blp->blp_busy_threads);
2226 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2227 "ldlm_bl_%02d", bltd->bltd_num);
2228 cfs_daemonize(bltd->bltd_name);
2230 cfs_complete(&bltd->bltd_comp);
2231 /* cannot use bltd after this, it is only on caller's stack */
2235 struct l_wait_info lwi = { 0 };
2236 struct ldlm_bl_work_item *blwi = NULL;
2239 blwi = ldlm_bl_get_work(blp);
2242 cfs_atomic_dec(&blp->blp_busy_threads);
2243 l_wait_event_exclusive(blp->blp_waitq,
2244 (blwi = ldlm_bl_get_work(blp)) != NULL,
2246 busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
2248 busy = cfs_atomic_read(&blp->blp_busy_threads);
2251 if (blwi->blwi_ns == NULL)
2252 /* added by ldlm_cleanup() */
2255 /* Not fatal if racy and have a few too many threads */
2256 if (unlikely(busy < blp->blp_max_threads &&
2257 busy >= cfs_atomic_read(&blp->blp_num_threads) &&
2258 !blwi->blwi_mem_pressure))
2259 /* discard the return value, we tried */
2260 ldlm_bl_thread_start(blp);
2262 if (blwi->blwi_mem_pressure)
2263 cfs_memory_pressure_set();
2265 if (blwi->blwi_count) {
2267 /* The special case when we cancel locks in lru
2268 * asynchronously, we pass the list of locks here.
2269 * Thus locks are marked LDLM_FL_CANCELING, but NOT
2270 * canceled locally yet. */
2271 count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
2274 ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
2276 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2279 if (blwi->blwi_mem_pressure)
2280 cfs_memory_pressure_clr();
2282 if (blwi->blwi_mode == LDLM_ASYNC)
2283 OBD_FREE(blwi, sizeof(*blwi));
2285 cfs_complete(&blwi->blwi_comp);
2288 cfs_atomic_dec(&blp->blp_busy_threads);
2289 cfs_atomic_dec(&blp->blp_num_threads);
2290 cfs_complete(&blp->blp_comp);
2296 static int ldlm_setup(void);
2297 static int ldlm_cleanup(void);
2299 int ldlm_get_ref(void)
2303 cfs_mutex_down(&ldlm_ref_sem);
2304 if (++ldlm_refcount == 1) {
2309 cfs_mutex_up(&ldlm_ref_sem);
2314 void ldlm_put_ref(void)
2317 cfs_mutex_down(&ldlm_ref_sem);
2318 if (ldlm_refcount == 1) {
2319 int rc = ldlm_cleanup();
2321 CERROR("ldlm_cleanup failed: %d\n", rc);
2327 cfs_mutex_up(&ldlm_ref_sem);
2333 * Export handle<->lock hash operations.
2336 ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2338 return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2342 ldlm_export_lock_key(cfs_hlist_node_t *hnode)
2344 struct ldlm_lock *lock;
2346 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2347 return &lock->l_remote_handle;
2351 ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
2353 struct ldlm_lock *lock;
2355 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2356 lock->l_remote_handle = *(struct lustre_handle *)key;
2360 ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
2362 return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
2366 ldlm_export_lock_object(cfs_hlist_node_t *hnode)
2368 return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2372 ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2374 struct ldlm_lock *lock;
2376 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2377 LDLM_LOCK_GET(lock);
2381 ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2383 struct ldlm_lock *lock;
2385 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2386 LDLM_LOCK_RELEASE(lock);
2389 static cfs_hash_ops_t ldlm_export_lock_ops = {
2390 .hs_hash = ldlm_export_lock_hash,
2391 .hs_key = ldlm_export_lock_key,
2392 .hs_keycmp = ldlm_export_lock_keycmp,
2393 .hs_keycpy = ldlm_export_lock_keycpy,
2394 .hs_object = ldlm_export_lock_object,
2395 .hs_get = ldlm_export_lock_get,
2396 .hs_put = ldlm_export_lock_put,
2397 .hs_put_locked = ldlm_export_lock_put,
2400 int ldlm_init_export(struct obd_export *exp)
2404 exp->exp_lock_hash =
2405 cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
2406 HASH_EXP_LOCK_CUR_BITS,
2407 HASH_EXP_LOCK_MAX_BITS,
2408 HASH_EXP_LOCK_BKT_BITS, 0,
2409 CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
2410 &ldlm_export_lock_ops,
2411 CFS_HASH_DEFAULT | CFS_HASH_REHASH_KEY |
2412 CFS_HASH_NBLK_CHANGE);
2414 if (!exp->exp_lock_hash)
2419 EXPORT_SYMBOL(ldlm_init_export);
2421 void ldlm_destroy_export(struct obd_export *exp)
2424 cfs_hash_putref(exp->exp_lock_hash);
2425 exp->exp_lock_hash = NULL;
2428 EXPORT_SYMBOL(ldlm_destroy_export);
2430 static int ldlm_setup(void)
2432 struct ldlm_bl_pool *blp;
2434 int ldlm_min_threads = LDLM_THREADS_AUTO_MIN;
2435 int ldlm_max_threads = LDLM_THREADS_AUTO_MAX;
2441 if (ldlm_state != NULL)
2444 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2445 if (ldlm_state == NULL)
2449 rc = ldlm_proc_setup();
2455 if (ldlm_num_threads) {
2456 /* If ldlm_num_threads is set, it is the min and the max. */
2457 if (ldlm_num_threads > LDLM_THREADS_AUTO_MAX)
2458 ldlm_num_threads = LDLM_THREADS_AUTO_MAX;
2459 if (ldlm_num_threads < LDLM_THREADS_AUTO_MIN)
2460 ldlm_num_threads = LDLM_THREADS_AUTO_MIN;
2461 ldlm_min_threads = ldlm_max_threads = ldlm_num_threads;
2465 ldlm_state->ldlm_cb_service =
2466 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2467 LDLM_MAXREPSIZE, LDLM_CB_REQUEST_PORTAL,
2468 LDLM_CB_REPLY_PORTAL, 2,
2469 ldlm_callback_handler, "ldlm_cbd",
2470 ldlm_svc_proc_dir, NULL,
2471 ldlm_min_threads, ldlm_max_threads,
2473 LCT_MD_THREAD|LCT_DT_THREAD, NULL);
2475 if (!ldlm_state->ldlm_cb_service) {
2476 CERROR("failed to start service\n");
2477 GOTO(out_proc, rc = -ENOMEM);
2480 ldlm_state->ldlm_cancel_service =
2481 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2482 LDLM_MAXREPSIZE, LDLM_CANCEL_REQUEST_PORTAL,
2483 LDLM_CANCEL_REPLY_PORTAL, 6,
2484 ldlm_cancel_handler, "ldlm_canceld",
2485 ldlm_svc_proc_dir, NULL,
2486 ldlm_min_threads, ldlm_max_threads,
2488 LCT_MD_THREAD|LCT_DT_THREAD|LCT_CL_THREAD,
2491 if (!ldlm_state->ldlm_cancel_service) {
2492 CERROR("failed to start service\n");
2493 GOTO(out_proc, rc = -ENOMEM);
2496 OBD_ALLOC(blp, sizeof(*blp));
2498 GOTO(out_proc, rc = -ENOMEM);
2499 ldlm_state->ldlm_bl_pool = blp;
2501 cfs_spin_lock_init(&blp->blp_lock);
2502 CFS_INIT_LIST_HEAD(&blp->blp_list);
2503 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2504 cfs_waitq_init(&blp->blp_waitq);
2505 cfs_atomic_set(&blp->blp_num_threads, 0);
2506 cfs_atomic_set(&blp->blp_busy_threads, 0);
2507 blp->blp_min_threads = ldlm_min_threads;
2508 blp->blp_max_threads = ldlm_max_threads;
2511 for (i = 0; i < blp->blp_min_threads; i++) {
2512 rc = ldlm_bl_thread_start(blp);
2514 GOTO(out_thread, rc);
2517 rc = ptlrpc_start_threads(ldlm_state->ldlm_cancel_service);
2519 GOTO(out_thread, rc);
2521 rc = ptlrpc_start_threads(ldlm_state->ldlm_cb_service);
2523 GOTO(out_thread, rc);
2525 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2526 expired_lock_thread.elt_state = ELT_STOPPED;
2527 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2529 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2530 cfs_spin_lock_init(&waiting_locks_spinlock);
2531 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2533 rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
2535 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2536 GOTO(out_thread, rc);
2539 cfs_wait_event(expired_lock_thread.elt_waitq,
2540 expired_lock_thread.elt_state == ELT_READY);
2544 rc = ldlm_pools_init();
2546 GOTO(out_thread, rc);
2552 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2553 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2558 ldlm_proc_cleanup();
2561 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2566 static int ldlm_cleanup(void)
2569 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2573 if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2574 !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2575 CERROR("ldlm still has namespaces; clean these up first.\n");
2576 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2577 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2586 while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
2587 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2589 cfs_init_completion(&blp->blp_comp);
2591 cfs_spin_lock(&blp->blp_lock);
2592 cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2593 cfs_waitq_signal(&blp->blp_waitq);
2594 cfs_spin_unlock(&blp->blp_lock);
2596 cfs_wait_for_completion(&blp->blp_comp);
2598 OBD_FREE(blp, sizeof(*blp));
2600 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2601 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2602 ldlm_proc_cleanup();
2604 expired_lock_thread.elt_state = ELT_TERMINATE;
2605 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2606 cfs_wait_event(expired_lock_thread.elt_waitq,
2607 expired_lock_thread.elt_state == ELT_STOPPED);
2609 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2610 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2613 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2621 cfs_init_mutex(&ldlm_ref_sem);
2622 cfs_init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2623 cfs_init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2624 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2625 sizeof(struct ldlm_resource), 0,
2626 CFS_SLAB_HWCACHE_ALIGN);
2627 if (ldlm_resource_slab == NULL)
2630 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2631 sizeof(struct ldlm_lock), 0,
2632 CFS_SLAB_HWCACHE_ALIGN | CFS_SLAB_DESTROY_BY_RCU);
2633 if (ldlm_lock_slab == NULL) {
2634 cfs_mem_cache_destroy(ldlm_resource_slab);
2638 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2639 sizeof(struct ldlm_interval),
2640 0, CFS_SLAB_HWCACHE_ALIGN);
2641 if (ldlm_interval_slab == NULL) {
2642 cfs_mem_cache_destroy(ldlm_resource_slab);
2643 cfs_mem_cache_destroy(ldlm_lock_slab);
2646 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2647 class_export_dump_hook = ldlm_dump_export_locks;
2652 void ldlm_exit(void)
2656 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2657 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2658 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2660 /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
2661 * synchronize_rcu() to wait a grace period elapsed, so that
2662 * ldlm_lock_free() get a chance to be called. */
2665 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2666 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2667 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2668 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2672 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2675 EXPORT_SYMBOL(ldlm_get_processing_policy);
2676 EXPORT_SYMBOL(ldlm_lock2desc);
2677 EXPORT_SYMBOL(ldlm_register_intent);
2678 EXPORT_SYMBOL(ldlm_lockname);
2679 EXPORT_SYMBOL(ldlm_typename);
2680 EXPORT_SYMBOL(ldlm_lock2handle);
2681 EXPORT_SYMBOL(__ldlm_handle2lock);
2682 EXPORT_SYMBOL(ldlm_lock_get);
2683 EXPORT_SYMBOL(ldlm_lock_put);
2684 EXPORT_SYMBOL(ldlm_lock_match);
2685 EXPORT_SYMBOL(ldlm_lock_cancel);
2686 EXPORT_SYMBOL(ldlm_lock_addref);
2687 EXPORT_SYMBOL(ldlm_lock_addref_try);
2688 EXPORT_SYMBOL(ldlm_lock_decref);
2689 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2690 EXPORT_SYMBOL(ldlm_lock_change_resource);
2691 EXPORT_SYMBOL(ldlm_it2str);
2692 EXPORT_SYMBOL(ldlm_lock_dump);
2693 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2694 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2695 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
2696 EXPORT_SYMBOL(ldlm_lock_allow_match);
2697 EXPORT_SYMBOL(ldlm_lock_downgrade);
2698 EXPORT_SYMBOL(ldlm_lock_convert);
2700 /* ldlm_request.c */
2701 EXPORT_SYMBOL(ldlm_completion_ast_async);
2702 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2703 EXPORT_SYMBOL(ldlm_completion_ast);
2704 EXPORT_SYMBOL(ldlm_blocking_ast);
2705 EXPORT_SYMBOL(ldlm_glimpse_ast);
2706 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2707 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2708 EXPORT_SYMBOL(ldlm_prep_elc_req);
2709 EXPORT_SYMBOL(ldlm_cli_convert);
2710 EXPORT_SYMBOL(ldlm_cli_enqueue);
2711 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2712 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2713 EXPORT_SYMBOL(ldlm_cli_cancel);
2714 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2715 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2716 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2717 EXPORT_SYMBOL(ldlm_replay_locks);
2718 EXPORT_SYMBOL(ldlm_resource_foreach);
2719 EXPORT_SYMBOL(ldlm_namespace_foreach);
2720 EXPORT_SYMBOL(ldlm_resource_iterate);
2721 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2722 EXPORT_SYMBOL(ldlm_cli_cancel_list_local);
2723 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2726 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2727 EXPORT_SYMBOL(ldlm_server_completion_ast);
2728 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2729 EXPORT_SYMBOL(ldlm_handle_enqueue);
2730 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2731 EXPORT_SYMBOL(ldlm_handle_cancel);
2732 EXPORT_SYMBOL(ldlm_request_cancel);
2733 EXPORT_SYMBOL(ldlm_handle_convert);
2734 EXPORT_SYMBOL(ldlm_handle_convert0);
2735 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2736 EXPORT_SYMBOL(ldlm_get_ref);
2737 EXPORT_SYMBOL(ldlm_put_ref);
2738 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2739 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2741 /* ldlm_resource.c */
2742 EXPORT_SYMBOL(ldlm_namespace_new);
2743 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2744 EXPORT_SYMBOL(ldlm_namespace_free);
2745 EXPORT_SYMBOL(ldlm_namespace_dump);
2746 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2747 EXPORT_SYMBOL(ldlm_resource_get);
2748 EXPORT_SYMBOL(ldlm_resource_putref);
2749 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2752 EXPORT_SYMBOL(client_import_add_conn);
2753 EXPORT_SYMBOL(client_import_del_conn);
2754 EXPORT_SYMBOL(client_obd_setup);
2755 EXPORT_SYMBOL(client_obd_cleanup);
2756 EXPORT_SYMBOL(client_connect_import);
2757 EXPORT_SYMBOL(client_disconnect_export);
2758 EXPORT_SYMBOL(server_disconnect_export);
2759 EXPORT_SYMBOL(target_stop_recovery_thread);
2760 EXPORT_SYMBOL(target_handle_connect);
2761 EXPORT_SYMBOL(target_cleanup_recovery);
2762 EXPORT_SYMBOL(target_destroy_export);
2763 EXPORT_SYMBOL(target_cancel_recovery_timer);
2764 EXPORT_SYMBOL(target_send_reply);
2765 EXPORT_SYMBOL(target_queue_recovery_request);
2766 EXPORT_SYMBOL(target_handle_ping);
2767 EXPORT_SYMBOL(target_pack_pool_reply);
2768 EXPORT_SYMBOL(target_handle_disconnect);
2771 EXPORT_SYMBOL(lock_res_and_lock);
2772 EXPORT_SYMBOL(unlock_res_and_lock);