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, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * lustre/ldlm/ldlm_lockd.c
40 * Author: Peter Braam <braam@clusterfs.com>
41 * Author: Phil Schwan <phil@clusterfs.com>
45 # define EXPORT_SYMTAB
47 #define DEBUG_SUBSYSTEM S_LDLM
50 # include <libcfs/libcfs.h>
52 # include <liblustre.h>
55 #include <lustre_dlm.h>
56 #include <obd_class.h>
57 #include <libcfs/list.h>
58 #include "ldlm_internal.h"
61 static int ldlm_num_threads;
62 CFS_MODULE_PARM(ldlm_num_threads, "i", int, 0444,
63 "number of DLM service threads to start");
66 extern cfs_mem_cache_t *ldlm_resource_slab;
67 extern cfs_mem_cache_t *ldlm_lock_slab;
68 static cfs_semaphore_t ldlm_ref_sem;
69 static int ldlm_refcount;
71 struct ldlm_cb_async_args {
72 struct ldlm_cb_set_arg *ca_set_arg;
73 struct ldlm_lock *ca_lock;
78 static struct ldlm_state *ldlm_state;
80 inline cfs_time_t round_timeout(cfs_time_t timeout)
82 return cfs_time_seconds((int)cfs_duration_sec(cfs_time_sub(timeout, 0)) + 1);
85 /* timeout for initial callback (AST) reply (bz10399) */
86 static inline unsigned int ldlm_get_rq_timeout(void)
89 unsigned int timeout = min(ldlm_timeout, obd_timeout / 3);
91 return timeout < 1 ? 1 : timeout;
95 /* w_l_spinlock protects both waiting_locks_list and expired_lock_thread */
96 static cfs_spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
97 static cfs_list_t waiting_locks_list;
98 static cfs_timer_t waiting_locks_timer;
100 static struct expired_lock_thread {
101 cfs_waitq_t elt_waitq;
104 cfs_list_t elt_expired_locks;
105 } expired_lock_thread;
108 #define ELT_STOPPED 0
110 #define ELT_TERMINATE 2
112 struct ldlm_bl_pool {
113 cfs_spinlock_t blp_lock;
116 * blp_prio_list is used for callbacks that should be handled
117 * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
120 cfs_list_t blp_prio_list;
123 * blp_list is used for all other callbacks which are likely
124 * to take longer to process.
128 cfs_waitq_t blp_waitq;
129 cfs_completion_t blp_comp;
130 cfs_atomic_t blp_num_threads;
131 cfs_atomic_t blp_busy_threads;
136 struct ldlm_bl_work_item {
137 cfs_list_t blwi_entry;
138 struct ldlm_namespace *blwi_ns;
139 struct ldlm_lock_desc blwi_ld;
140 struct ldlm_lock *blwi_lock;
141 cfs_list_t blwi_head;
143 cfs_completion_t blwi_comp;
145 int blwi_mem_pressure;
150 static inline int have_expired_locks(void)
155 cfs_spin_lock_bh(&waiting_locks_spinlock);
156 need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks);
157 cfs_spin_unlock_bh(&waiting_locks_spinlock);
162 static int expired_lock_main(void *arg)
164 cfs_list_t *expired = &expired_lock_thread.elt_expired_locks;
165 struct l_wait_info lwi = { 0 };
169 cfs_daemonize("ldlm_elt");
171 expired_lock_thread.elt_state = ELT_READY;
172 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
175 l_wait_event(expired_lock_thread.elt_waitq,
176 have_expired_locks() ||
177 expired_lock_thread.elt_state == ELT_TERMINATE,
180 cfs_spin_lock_bh(&waiting_locks_spinlock);
181 if (expired_lock_thread.elt_dump) {
182 struct libcfs_debug_msg_data msgdata = {
183 .msg_file = __FILE__,
184 .msg_fn = "waiting_locks_callback",
185 .msg_line = expired_lock_thread.elt_dump };
186 cfs_spin_unlock_bh(&waiting_locks_spinlock);
188 /* from waiting_locks_callback, but not in timer */
189 libcfs_debug_dumplog();
190 libcfs_run_lbug_upcall(&msgdata);
192 cfs_spin_lock_bh(&waiting_locks_spinlock);
193 expired_lock_thread.elt_dump = 0;
198 while (!cfs_list_empty(expired)) {
199 struct obd_export *export;
200 struct ldlm_lock *lock;
202 lock = cfs_list_entry(expired->next, struct ldlm_lock,
204 if ((void *)lock < LP_POISON + CFS_PAGE_SIZE &&
205 (void *)lock >= LP_POISON) {
206 cfs_spin_unlock_bh(&waiting_locks_spinlock);
207 CERROR("free lock on elt list %p\n", lock);
210 cfs_list_del_init(&lock->l_pending_chain);
211 if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE &&
212 (void *)lock->l_export >= LP_POISON) {
213 CERROR("lock with free export on elt list %p\n",
215 lock->l_export = NULL;
216 LDLM_ERROR(lock, "free export");
217 /* release extra ref grabbed by
218 * ldlm_add_waiting_lock() or
219 * ldlm_failed_ast() */
220 LDLM_LOCK_RELEASE(lock);
223 export = class_export_lock_get(lock->l_export, lock);
224 cfs_spin_unlock_bh(&waiting_locks_spinlock);
227 class_fail_export(export);
228 class_export_lock_put(export, lock);
230 /* release extra ref grabbed by ldlm_add_waiting_lock()
231 * or ldlm_failed_ast() */
232 LDLM_LOCK_RELEASE(lock);
234 cfs_spin_lock_bh(&waiting_locks_spinlock);
236 cfs_spin_unlock_bh(&waiting_locks_spinlock);
238 if (do_dump && obd_dump_on_eviction) {
239 CERROR("dump the log upon eviction\n");
240 libcfs_debug_dumplog();
243 if (expired_lock_thread.elt_state == ELT_TERMINATE)
247 expired_lock_thread.elt_state = ELT_STOPPED;
248 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
252 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
255 * Check if there is a request in the export request list
256 * which prevents the lock canceling.
258 static int ldlm_lock_busy(struct ldlm_lock *lock)
260 struct ptlrpc_request *req;
264 if (lock->l_export == NULL)
267 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
268 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
270 if (req->rq_ops->hpreq_lock_match) {
271 match = req->rq_ops->hpreq_lock_match(req, lock);
276 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
280 /* This is called from within a timer interrupt and cannot schedule */
281 static void waiting_locks_callback(unsigned long unused)
283 struct ldlm_lock *lock;
286 cfs_spin_lock_bh(&waiting_locks_spinlock);
287 while (!cfs_list_empty(&waiting_locks_list)) {
288 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
290 if (cfs_time_after(lock->l_callback_timeout,
291 cfs_time_current()) ||
292 (lock->l_req_mode == LCK_GROUP))
295 if (ptlrpc_check_suspend()) {
296 /* there is a case when we talk to one mds, holding
297 * lock from another mds. this way we easily can get
298 * here, if second mds is being recovered. so, we
299 * suspend timeouts. bug 6019 */
301 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
302 lock->l_export->exp_client_uuid.uuid,
303 lock->l_export->exp_connection->c_remote_uuid.uuid,
304 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
306 cfs_list_del_init(&lock->l_pending_chain);
307 cfs_spin_unlock_bh(&waiting_locks_spinlock);
308 ldlm_add_waiting_lock(lock);
312 /* if timeout overlaps the activation time of suspended timeouts
313 * then extend it to give a chance for client to reconnect */
314 if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
315 cfs_time_seconds(obd_timeout)/2),
316 ptlrpc_suspend_wakeup_time())) {
317 LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
318 lock->l_export->exp_client_uuid.uuid,
319 lock->l_export->exp_connection->c_remote_uuid.uuid,
320 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
322 cfs_list_del_init(&lock->l_pending_chain);
323 cfs_spin_unlock_bh(&waiting_locks_spinlock);
324 ldlm_add_waiting_lock(lock);
328 /* Check if we need to prolong timeout */
329 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) &&
330 ldlm_lock_busy(lock)) {
333 if (lock->l_pending_chain.next == &waiting_locks_list)
338 cfs_spin_unlock_bh(&waiting_locks_spinlock);
339 LDLM_DEBUG(lock, "prolong the busy lock");
340 ldlm_refresh_waiting_lock(lock,
341 ldlm_get_enq_timeout(lock));
342 cfs_spin_lock_bh(&waiting_locks_spinlock);
345 LDLM_LOCK_RELEASE(lock);
349 LDLM_LOCK_RELEASE(lock);
352 ldlm_lock_to_ns(lock)->ns_timeouts++;
353 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
354 "evicting client at %s ",
355 cfs_time_current_sec()- lock->l_last_activity,
357 lock->l_export->exp_connection->c_peer.nid));
359 /* no needs to take an extra ref on the lock since it was in
360 * the waiting_locks_list and ldlm_add_waiting_lock()
361 * already grabbed a ref */
362 cfs_list_del(&lock->l_pending_chain);
363 cfs_list_add(&lock->l_pending_chain,
364 &expired_lock_thread.elt_expired_locks);
367 if (!cfs_list_empty(&expired_lock_thread.elt_expired_locks)) {
368 if (obd_dump_on_timeout)
369 expired_lock_thread.elt_dump = __LINE__;
371 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
375 * Make sure the timer will fire again if we have any locks
378 if (!cfs_list_empty(&waiting_locks_list)) {
379 cfs_time_t timeout_rounded;
380 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
382 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
383 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
385 cfs_spin_unlock_bh(&waiting_locks_spinlock);
389 * Indicate that we're waiting for a client to call us back cancelling a given
390 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
391 * timer to fire appropriately. (We round up to the next second, to avoid
392 * floods of timer firings during periods of high lock contention and traffic).
393 * As done by ldlm_add_waiting_lock(), the caller must grab a lock reference
394 * if it has been added to the waiting list (1 is returned).
396 * Called with the namespace lock held.
398 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds)
401 cfs_time_t timeout_rounded;
403 if (!cfs_list_empty(&lock->l_pending_chain))
406 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
407 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
410 timeout = cfs_time_shift(seconds);
411 if (likely(cfs_time_after(timeout, lock->l_callback_timeout)))
412 lock->l_callback_timeout = timeout;
414 timeout_rounded = round_timeout(lock->l_callback_timeout);
416 if (cfs_time_before(timeout_rounded,
417 cfs_timer_deadline(&waiting_locks_timer)) ||
418 !cfs_timer_is_armed(&waiting_locks_timer)) {
419 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
421 /* if the new lock has a shorter timeout than something earlier on
422 the list, we'll wait the longer amount of time; no big deal. */
424 cfs_list_add_tail(&lock->l_pending_chain, &waiting_locks_list);
428 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
431 int timeout = ldlm_get_enq_timeout(lock);
433 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
435 cfs_spin_lock_bh(&waiting_locks_spinlock);
436 if (lock->l_destroyed) {
437 static cfs_time_t next;
438 cfs_spin_unlock_bh(&waiting_locks_spinlock);
439 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
440 if (cfs_time_after(cfs_time_current(), next)) {
441 next = cfs_time_shift(14400);
442 libcfs_debug_dumpstack(NULL);
447 ret = __ldlm_add_waiting_lock(lock, timeout);
449 /* grab ref on the lock if it has been added to the
453 cfs_spin_unlock_bh(&waiting_locks_spinlock);
456 cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
457 if (cfs_list_empty(&lock->l_exp_list))
458 cfs_list_add(&lock->l_exp_list,
459 &lock->l_export->exp_bl_list);
460 cfs_spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
463 LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
464 ret == 0 ? "not re-" : "", timeout,
465 AT_OFF ? "off" : "on");
470 * Remove a lock from the pending list, likely because it had its cancellation
471 * callback arrive without incident. This adjusts the lock-timeout timer if
472 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
473 * As done by ldlm_del_waiting_lock(), the caller must release the lock
474 * reference when the lock is removed from any list (1 is returned).
476 * Called with namespace lock held.
478 static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
480 cfs_list_t *list_next;
482 if (cfs_list_empty(&lock->l_pending_chain))
485 list_next = lock->l_pending_chain.next;
486 if (lock->l_pending_chain.prev == &waiting_locks_list) {
487 /* Removing the head of the list, adjust timer. */
488 if (list_next == &waiting_locks_list) {
489 /* No more, just cancel. */
490 cfs_timer_disarm(&waiting_locks_timer);
492 struct ldlm_lock *next;
493 next = cfs_list_entry(list_next, struct ldlm_lock,
495 cfs_timer_arm(&waiting_locks_timer,
496 round_timeout(next->l_callback_timeout));
499 cfs_list_del_init(&lock->l_pending_chain);
504 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
508 if (lock->l_export == NULL) {
509 /* We don't have a "waiting locks list" on clients. */
510 CDEBUG(D_DLMTRACE, "Client lock %p : no-op\n", lock);
514 cfs_spin_lock_bh(&waiting_locks_spinlock);
515 ret = __ldlm_del_waiting_lock(lock);
516 cfs_spin_unlock_bh(&waiting_locks_spinlock);
518 /* remove the lock out of export blocking list */
519 cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
520 cfs_list_del_init(&lock->l_exp_list);
521 cfs_spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
524 /* release lock ref if it has indeed been removed
526 LDLM_LOCK_RELEASE(lock);
529 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
536 * Called with namespace lock held.
538 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
540 if (lock->l_export == NULL) {
541 /* We don't have a "waiting locks list" on clients. */
542 LDLM_DEBUG(lock, "client lock: no-op");
546 cfs_spin_lock_bh(&waiting_locks_spinlock);
548 if (cfs_list_empty(&lock->l_pending_chain)) {
549 cfs_spin_unlock_bh(&waiting_locks_spinlock);
550 LDLM_DEBUG(lock, "wasn't waiting");
554 /* we remove/add the lock to the waiting list, so no needs to
555 * release/take a lock reference */
556 __ldlm_del_waiting_lock(lock);
557 __ldlm_add_waiting_lock(lock, timeout);
558 cfs_spin_unlock_bh(&waiting_locks_spinlock);
560 LDLM_DEBUG(lock, "refreshed");
563 #else /* !__KERNEL__ */
565 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
567 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
571 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
576 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
580 #endif /* __KERNEL__ */
582 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
583 const char *ast_type)
585 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
586 "to a lock %s callback time out: rc %d\n",
587 lock->l_export->exp_obd->obd_name,
588 obd_export_nid2str(lock->l_export), ast_type, rc);
590 if (obd_dump_on_timeout)
591 libcfs_debug_dumplog();
593 cfs_spin_lock_bh(&waiting_locks_spinlock);
594 if (__ldlm_del_waiting_lock(lock) == 0)
595 /* the lock was not in any list, grab an extra ref before adding
596 * the lock to the expired list */
598 cfs_list_add(&lock->l_pending_chain,
599 &expired_lock_thread.elt_expired_locks);
600 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
601 cfs_spin_unlock_bh(&waiting_locks_spinlock);
603 class_fail_export(lock->l_export);
607 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
608 struct ptlrpc_request *req, int rc,
609 const char *ast_type)
611 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
613 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
614 LASSERT(lock->l_export);
615 if (lock->l_export->exp_libclient) {
616 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
617 " timeout, just cancelling lock", ast_type,
618 libcfs_nid2str(peer.nid));
619 ldlm_lock_cancel(lock);
621 } else if (lock->l_flags & LDLM_FL_CANCEL) {
622 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
623 "cancel was received (AST reply lost?)",
624 ast_type, libcfs_nid2str(peer.nid));
625 ldlm_lock_cancel(lock);
628 ldlm_del_waiting_lock(lock);
629 ldlm_failed_ast(lock, rc, ast_type);
633 struct ldlm_resource *res = lock->l_resource;
634 LDLM_DEBUG(lock, "client (nid %s) returned %d"
635 " from %s AST - normal race",
636 libcfs_nid2str(peer.nid),
638 lustre_msg_get_status(req->rq_repmsg) : -1,
641 /* update lvbo to return proper attributes.
643 ldlm_resource_getref(res);
644 ldlm_res_lvbo_update(res, NULL, 1);
645 ldlm_resource_putref(res);
649 LDLM_ERROR(lock, "client (nid %s) returned %d "
650 "from %s AST", libcfs_nid2str(peer.nid),
651 (req->rq_repmsg != NULL) ?
652 lustre_msg_get_status(req->rq_repmsg) : 0,
655 ldlm_lock_cancel(lock);
656 /* Server-side AST functions are called from ldlm_reprocess_all,
657 * which needs to be told to please restart its reprocessing. */
664 static int ldlm_cb_interpret(const struct lu_env *env,
665 struct ptlrpc_request *req, void *data, int rc)
667 struct ldlm_cb_async_args *ca = data;
668 struct ldlm_lock *lock = ca->ca_lock;
669 struct ldlm_cb_set_arg *arg = ca->ca_set_arg;
673 LASSERT(lock != NULL);
675 rc = ldlm_handle_ast_error(lock, req, rc,
676 arg->type == LDLM_BL_CALLBACK
677 ? "blocking" : "completion");
679 cfs_atomic_inc(&arg->restart);
681 LDLM_LOCK_RELEASE(lock);
683 count = cfs_atomic_dec_return(&arg->rpcs);
684 if (count < arg->threshold)
685 cfs_waitq_signal(&arg->waitq);
691 static inline int ldlm_bl_and_cp_ast_tail(struct ptlrpc_request *req,
692 struct ldlm_cb_set_arg *arg,
693 struct ldlm_lock *lock,
699 if (unlikely(instant_cancel)) {
700 rc = ptl_send_rpc(req, 1);
701 ptlrpc_req_finished(req);
703 cfs_atomic_inc(&arg->restart);
706 if (cfs_atomic_inc_return(&arg->rpcs) == 1)
707 cfs_atomic_inc(&arg->refcount);
708 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
715 * Check if there are requests in the export request list which prevent
716 * the lock canceling and make these requests high priority ones.
718 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
720 struct ptlrpc_request *req;
723 if (lock->l_export == NULL) {
724 LDLM_DEBUG(lock, "client lock: no-op");
728 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
729 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
731 /* Do not process requests that were not yet added to there
732 * incoming queue or were already removed from there for
734 if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
735 req->rq_ops->hpreq_lock_match &&
736 req->rq_ops->hpreq_lock_match(req, lock))
737 ptlrpc_hpreq_reorder(req);
739 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
744 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
745 * enqueued server lock conflicts with given one.
747 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
748 * to wait for client response.
750 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
751 struct ldlm_lock_desc *desc,
752 void *data, int flag)
754 struct ldlm_cb_async_args *ca;
755 struct ldlm_cb_set_arg *arg = data;
756 struct ldlm_request *body;
757 struct ptlrpc_request *req;
758 int instant_cancel = 0;
762 if (flag == LDLM_CB_CANCELING)
763 /* Don't need to do anything here. */
767 LASSERT(data != NULL);
768 if (lock->l_export->exp_obd->obd_recovering != 0) {
769 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
770 ldlm_lock_dump(D_ERROR, lock, 0);
773 ldlm_lock_reorder_req(lock);
775 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
776 &RQF_LDLM_BL_CALLBACK,
777 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
781 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
782 ca = ptlrpc_req_async_args(req);
783 ca->ca_set_arg = arg;
786 req->rq_interpret_reply = ldlm_cb_interpret;
787 req->rq_no_resend = 1;
789 lock_res(lock->l_resource);
790 if (lock->l_granted_mode != lock->l_req_mode) {
791 /* this blocking AST will be communicated as part of the
792 * completion AST instead */
793 unlock_res(lock->l_resource);
794 ptlrpc_req_finished(req);
795 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
799 if (lock->l_destroyed) {
800 /* What's the point? */
801 unlock_res(lock->l_resource);
802 ptlrpc_req_finished(req);
806 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
809 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
810 body->lock_handle[0] = lock->l_remote_handle;
811 body->lock_desc = *desc;
812 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
814 LDLM_DEBUG(lock, "server preparing blocking AST");
816 ptlrpc_request_set_replen(req);
817 if (instant_cancel) {
818 unlock_res(lock->l_resource);
819 ldlm_lock_cancel(lock);
821 LASSERT(lock->l_granted_mode == lock->l_req_mode);
822 ldlm_add_waiting_lock(lock);
823 unlock_res(lock->l_resource);
826 req->rq_send_state = LUSTRE_IMP_FULL;
827 /* ptlrpc_request_alloc_pack already set timeout */
829 req->rq_timeout = ldlm_get_rq_timeout();
831 if (lock->l_export && lock->l_export->exp_nid_stats &&
832 lock->l_export->exp_nid_stats->nid_ldlm_stats)
833 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
834 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
836 rc = ldlm_bl_and_cp_ast_tail(req, arg, lock, instant_cancel);
841 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
843 struct ldlm_cb_set_arg *arg = data;
844 struct ldlm_request *body;
845 struct ptlrpc_request *req;
846 struct ldlm_cb_async_args *ca;
847 long total_enqueue_wait;
848 int instant_cancel = 0;
852 LASSERT(lock != NULL);
853 LASSERT(data != NULL);
855 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
856 lock->l_last_activity);
858 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
859 &RQF_LDLM_CP_CALLBACK);
863 /* server namespace, doesn't need lock */
864 if (lock->l_resource->lr_lvb_len) {
865 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
866 lock->l_resource->lr_lvb_len);
869 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
871 ptlrpc_request_free(req);
875 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
876 ca = ptlrpc_req_async_args(req);
877 ca->ca_set_arg = arg;
880 req->rq_interpret_reply = ldlm_cb_interpret;
881 req->rq_no_resend = 1;
882 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
884 body->lock_handle[0] = lock->l_remote_handle;
885 body->lock_flags = flags;
886 ldlm_lock2desc(lock, &body->lock_desc);
887 if (lock->l_resource->lr_lvb_len) {
888 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
890 lock_res(lock->l_resource);
891 memcpy(lvb, lock->l_resource->lr_lvb_data,
892 lock->l_resource->lr_lvb_len);
893 unlock_res(lock->l_resource);
896 LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)",
899 /* Server-side enqueue wait time estimate, used in
900 __ldlm_add_waiting_lock to set future enqueue timers */
901 if (total_enqueue_wait < ldlm_get_enq_timeout(lock))
902 at_measured(ldlm_lock_to_ns_at(lock),
905 /* bz18618. Don't add lock enqueue time we spend waiting for a
906 previous callback to fail. Locks waiting legitimately will
907 get extended by ldlm_refresh_waiting_lock regardless of the
908 estimate, so it's okay to underestimate here. */
909 LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. "
910 "It is likely that a previous callback timed out.",
912 at_get(ldlm_lock_to_ns_at(lock)));
914 ptlrpc_request_set_replen(req);
916 req->rq_send_state = LUSTRE_IMP_FULL;
917 /* ptlrpc_request_pack already set timeout */
919 req->rq_timeout = ldlm_get_rq_timeout();
921 /* We only send real blocking ASTs after the lock is granted */
922 lock_res_and_lock(lock);
923 if (lock->l_flags & LDLM_FL_AST_SENT) {
924 body->lock_flags |= LDLM_FL_AST_SENT;
925 /* copy ast flags like LDLM_FL_DISCARD_DATA */
926 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
928 /* We might get here prior to ldlm_handle_enqueue setting
929 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
930 * into waiting list, but this is safe and similar code in
931 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
932 * that would not only cancel the lock, but will also remove
933 * it from waiting list */
934 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
935 unlock_res_and_lock(lock);
936 ldlm_lock_cancel(lock);
938 lock_res_and_lock(lock);
940 /* start the lock-timeout clock */
941 ldlm_add_waiting_lock(lock);
944 unlock_res_and_lock(lock);
946 if (lock->l_export && lock->l_export->exp_nid_stats &&
947 lock->l_export->exp_nid_stats->nid_ldlm_stats)
948 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
949 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
951 rc = ldlm_bl_and_cp_ast_tail(req, arg, lock, instant_cancel);
956 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
958 struct ldlm_resource *res = lock->l_resource;
959 struct ldlm_request *body;
960 struct ptlrpc_request *req;
964 LASSERT(lock != NULL);
966 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
967 &RQF_LDLM_GL_CALLBACK,
968 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
973 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
974 body->lock_handle[0] = lock->l_remote_handle;
975 ldlm_lock2desc(lock, &body->lock_desc);
977 /* server namespace, doesn't need lock */
978 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
979 lock->l_resource->lr_lvb_len);
980 res = lock->l_resource;
981 ptlrpc_request_set_replen(req);
984 req->rq_send_state = LUSTRE_IMP_FULL;
985 /* ptlrpc_request_alloc_pack already set timeout */
987 req->rq_timeout = ldlm_get_rq_timeout();
989 if (lock->l_export && lock->l_export->exp_nid_stats &&
990 lock->l_export->exp_nid_stats->nid_ldlm_stats)
991 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
992 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
994 rc = ptlrpc_queue_wait(req);
995 /* Update the LVB from disk if the AST failed (this is a legal race)
997 * - Glimpse callback of local lock just return -ELDLM_NO_LOCK_DATA.
998 * - Glimpse callback of remote lock might return -ELDLM_NO_LOCK_DATA
999 * when inode is cleared. LU-274
1001 if (rc == -ELDLM_NO_LOCK_DATA) {
1002 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
1003 ldlm_res_lvbo_update(res, NULL, 1);
1004 } else if (rc != 0) {
1005 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
1007 rc = ldlm_res_lvbo_update(res, req, 1);
1010 ptlrpc_req_finished(req);
1011 if (rc == -ERESTART)
1012 ldlm_reprocess_all(res);
1018 extern unsigned long long lu_time_stamp_get(void);
1020 #define lu_time_stamp_get() time(NULL)
1023 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
1024 struct lprocfs_stats *srv_stats)
1026 int lock_type = 0, op = 0;
1028 lock_type = dlm_req->lock_desc.l_resource.lr_type;
1030 switch (lock_type) {
1032 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
1035 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
1036 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
1038 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
1041 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
1044 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
1052 lprocfs_counter_incr(srv_stats, op);
1058 * Main server-side entry point into LDLM. This is called by ptlrpc service
1059 * threads to carry out client lock enqueueing requests.
1061 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1062 struct ptlrpc_request *req,
1063 const struct ldlm_request *dlm_req,
1064 const struct ldlm_callback_suite *cbs)
1066 struct ldlm_reply *dlm_rep;
1068 ldlm_error_t err = ELDLM_OK;
1069 struct ldlm_lock *lock = NULL;
1070 void *cookie = NULL;
1074 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1076 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1077 flags = dlm_req->lock_flags;
1079 LASSERT(req->rq_export);
1081 if (req->rq_rqbd->rqbd_service->srv_stats)
1082 ldlm_svc_get_eopc(dlm_req,
1083 req->rq_rqbd->rqbd_service->srv_stats);
1085 if (req->rq_export && req->rq_export->exp_nid_stats &&
1086 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1087 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1088 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1090 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1091 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1092 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1093 dlm_req->lock_desc.l_resource.lr_type);
1094 GOTO(out, rc = -EFAULT);
1097 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1098 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1099 dlm_req->lock_desc.l_req_mode &
1100 (dlm_req->lock_desc.l_req_mode-1))) {
1101 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1102 dlm_req->lock_desc.l_req_mode);
1103 GOTO(out, rc = -EFAULT);
1106 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1107 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1109 DEBUG_REQ(D_ERROR, req,
1110 "PLAIN lock request from IBITS client?");
1111 GOTO(out, rc = -EPROTO);
1113 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1115 DEBUG_REQ(D_ERROR, req,
1116 "IBITS lock request from unaware client?");
1117 GOTO(out, rc = -EPROTO);
1121 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1122 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1123 ibits for mgc/mgs) */
1125 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1126 * inodebits lock if client does not support them. */
1127 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1128 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1129 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1130 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1131 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1132 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1133 dlm_req->lock_desc.l_req_mode = LCK_CR;
1137 if (unlikely(flags & LDLM_FL_REPLAY)) {
1138 /* Find an existing lock in the per-export lock hash */
1139 lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
1140 (void *)&dlm_req->lock_handle[0]);
1142 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1143 LPX64, lock->l_handle.h_cookie);
1144 GOTO(existing_lock, rc = 0);
1148 /* The lock's callback data might be set in the policy function */
1149 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1150 dlm_req->lock_desc.l_resource.lr_type,
1151 dlm_req->lock_desc.l_req_mode,
1155 GOTO(out, rc = -ENOMEM);
1157 lock->l_last_activity = cfs_time_current_sec();
1158 lock->l_remote_handle = dlm_req->lock_handle[0];
1159 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1161 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1162 /* Don't enqueue a lock onto the export if it is been disonnected
1163 * due to eviction (bug 3822) or server umount (bug 24324).
1164 * Cancel it now instead. */
1165 if (req->rq_export->exp_disconnected) {
1166 LDLM_ERROR(lock, "lock on disconnected export %p",
1168 GOTO(out, rc = -ENOTCONN);
1171 lock->l_export = class_export_lock_get(req->rq_export, lock);
1172 if (lock->l_export->exp_lock_hash)
1173 cfs_hash_add(lock->l_export->exp_lock_hash,
1174 &lock->l_remote_handle,
1179 if (flags & LDLM_FL_HAS_INTENT) {
1180 /* In this case, the reply buffer is allocated deep in
1181 * local_lock_enqueue by the policy function. */
1184 /* based on the assumption that lvb size never changes during
1185 * resource life time otherwise it need resource->lr_lock's
1187 if (lock->l_resource->lr_lvb_len) {
1188 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1190 lock->l_resource->lr_lvb_len);
1193 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1194 GOTO(out, rc = -ENOMEM);
1196 rc = req_capsule_server_pack(&req->rq_pill);
1201 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1202 ldlm_convert_policy_to_local(
1203 dlm_req->lock_desc.l_resource.lr_type,
1204 &dlm_req->lock_desc.l_policy_data,
1205 &lock->l_policy_data);
1206 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1207 lock->l_req_extent = lock->l_policy_data.l_extent;
1209 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1213 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1214 dlm_rep->lock_flags = flags;
1216 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1217 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1219 /* We never send a blocking AST until the lock is granted, but
1220 * we can tell it right now */
1221 lock_res_and_lock(lock);
1223 /* Now take into account flags to be inherited from original lock
1224 request both in reply to client and in our own lock flags. */
1225 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1226 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1228 /* Don't move a pending lock onto the export if it has already been
1229 * disconnected due to eviction (bug 5683) or server umount (bug 24324).
1230 * Cancel it now instead. */
1231 if (unlikely(req->rq_export->exp_disconnected ||
1232 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1233 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1235 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1236 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1237 if (lock->l_granted_mode == lock->l_req_mode) {
1239 * Only cancel lock if it was granted, because it would
1240 * be destroyed immediately and would never be granted
1241 * in the future, causing timeouts on client. Not
1242 * granted lock will be cancelled immediately after
1243 * sending completion AST.
1245 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1246 unlock_res_and_lock(lock);
1247 ldlm_lock_cancel(lock);
1248 lock_res_and_lock(lock);
1250 ldlm_add_waiting_lock(lock);
1253 /* Make sure we never ever grant usual metadata locks to liblustre
1255 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1256 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1257 req->rq_export->exp_libclient) {
1258 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1259 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1260 CERROR("Granting sync lock to libclient. "
1261 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1262 dlm_req->lock_flags, dlm_rep->lock_flags,
1264 LDLM_ERROR(lock, "sync lock");
1265 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1266 struct ldlm_intent *it;
1268 it = req_capsule_client_get(&req->rq_pill,
1271 CERROR("This is intent %s ("LPU64")\n",
1272 ldlm_it2str(it->opc), it->opc);
1278 unlock_res_and_lock(lock);
1282 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1283 if (!req->rq_packed_final) {
1284 err = lustre_pack_reply(req, 1, NULL, NULL);
1289 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1290 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1292 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1293 "(err=%d, rc=%d)", err, rc);
1296 if (lock->l_resource->lr_lvb_len > 0) {
1297 /* MDT path won't handle lr_lvb_data, so
1298 * lock/unlock better be contained in the
1302 lvb = req_capsule_server_get(&req->rq_pill,
1304 LASSERTF(lvb != NULL, "req %p, lock %p\n",
1306 lock_res(lock->l_resource);
1307 memcpy(lvb, lock->l_resource->lr_lvb_data,
1308 lock->l_resource->lr_lvb_len);
1309 unlock_res(lock->l_resource);
1312 lock_res_and_lock(lock);
1313 ldlm_resource_unlink_lock(lock);
1314 ldlm_lock_destroy_nolock(lock);
1315 unlock_res_and_lock(lock);
1318 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1319 ldlm_reprocess_all(lock->l_resource);
1321 LDLM_LOCK_RELEASE(lock);
1324 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1330 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1331 ldlm_completion_callback completion_callback,
1332 ldlm_blocking_callback blocking_callback,
1333 ldlm_glimpse_callback glimpse_callback)
1335 struct ldlm_request *dlm_req;
1336 struct ldlm_callback_suite cbs = {
1337 .lcs_completion = completion_callback,
1338 .lcs_blocking = blocking_callback,
1339 .lcs_glimpse = glimpse_callback
1343 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1344 if (dlm_req != NULL) {
1345 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1346 req, dlm_req, &cbs);
1353 int ldlm_handle_convert0(struct ptlrpc_request *req,
1354 const struct ldlm_request *dlm_req)
1356 struct ldlm_reply *dlm_rep;
1357 struct ldlm_lock *lock;
1361 if (req->rq_export && req->rq_export->exp_nid_stats &&
1362 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1363 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1364 LDLM_CONVERT - LDLM_FIRST_OPC);
1366 rc = req_capsule_server_pack(&req->rq_pill);
1370 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1371 dlm_rep->lock_flags = dlm_req->lock_flags;
1373 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1375 req->rq_status = EINVAL;
1379 LDLM_DEBUG(lock, "server-side convert handler START");
1381 lock->l_last_activity = cfs_time_current_sec();
1382 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1383 &dlm_rep->lock_flags);
1385 if (ldlm_del_waiting_lock(lock))
1386 LDLM_DEBUG(lock, "converted waiting lock");
1389 req->rq_status = EDEADLOCK;
1394 if (!req->rq_status)
1395 ldlm_reprocess_all(lock->l_resource);
1396 LDLM_DEBUG(lock, "server-side convert handler END");
1397 LDLM_LOCK_PUT(lock);
1399 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1404 int ldlm_handle_convert(struct ptlrpc_request *req)
1407 struct ldlm_request *dlm_req;
1409 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1410 if (dlm_req != NULL) {
1411 rc = ldlm_handle_convert0(req, dlm_req);
1413 CERROR ("Can't unpack dlm_req\n");
1419 /* Cancel all the locks whos handles are packed into ldlm_request */
1420 int ldlm_request_cancel(struct ptlrpc_request *req,
1421 const struct ldlm_request *dlm_req, int first)
1423 struct ldlm_resource *res, *pres = NULL;
1424 struct ldlm_lock *lock;
1425 int i, count, done = 0;
1428 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1432 /* There is no lock on the server at the replay time,
1433 * skip lock cancelling to make replay tests to pass. */
1434 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1437 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1438 "starting at %d", count, first);
1440 for (i = first; i < count; i++) {
1441 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1443 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1444 "lock (cookie "LPU64")",
1445 dlm_req->lock_handle[i].cookie);
1449 res = lock->l_resource;
1454 ldlm_reprocess_all(pres);
1455 LDLM_RESOURCE_DELREF(pres);
1456 ldlm_resource_putref(pres);
1459 ldlm_resource_getref(res);
1460 LDLM_RESOURCE_ADDREF(res);
1461 ldlm_res_lvbo_update(res, NULL, 1);
1465 ldlm_lock_cancel(lock);
1466 LDLM_LOCK_PUT(lock);
1469 ldlm_reprocess_all(pres);
1470 LDLM_RESOURCE_DELREF(pres);
1471 ldlm_resource_putref(pres);
1473 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1477 int ldlm_handle_cancel(struct ptlrpc_request *req)
1479 struct ldlm_request *dlm_req;
1483 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1484 if (dlm_req == NULL) {
1485 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1489 if (req->rq_export && req->rq_export->exp_nid_stats &&
1490 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1491 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1492 LDLM_CANCEL - LDLM_FIRST_OPC);
1494 rc = req_capsule_server_pack(&req->rq_pill);
1498 if (!ldlm_request_cancel(req, dlm_req, 0))
1499 req->rq_status = ESTALE;
1501 RETURN(ptlrpc_reply(req));
1504 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1505 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1510 LDLM_DEBUG(lock, "client blocking AST callback handler");
1512 lock_res_and_lock(lock);
1513 lock->l_flags |= LDLM_FL_CBPENDING;
1515 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1516 lock->l_flags |= LDLM_FL_CANCEL;
1518 do_ast = (!lock->l_readers && !lock->l_writers);
1519 unlock_res_and_lock(lock);
1522 CDEBUG(D_DLMTRACE, "Lock %p already unused, calling callback (%p)\n",
1523 lock, lock->l_blocking_ast);
1524 if (lock->l_blocking_ast != NULL)
1525 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1528 CDEBUG(D_DLMTRACE, "Lock %p is referenced, will be cancelled later\n",
1532 LDLM_DEBUG(lock, "client blocking callback handler END");
1533 LDLM_LOCK_RELEASE(lock);
1537 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1538 struct ldlm_namespace *ns,
1539 struct ldlm_request *dlm_req,
1540 struct ldlm_lock *lock)
1542 CFS_LIST_HEAD(ast_list);
1545 LDLM_DEBUG(lock, "client completion callback handler START");
1547 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1548 int to = cfs_time_seconds(1);
1550 cfs_schedule_timeout_and_set_state(
1551 CFS_TASK_INTERRUPTIBLE, to);
1552 if (lock->l_granted_mode == lock->l_req_mode ||
1558 lock_res_and_lock(lock);
1559 if (lock->l_destroyed ||
1560 lock->l_granted_mode == lock->l_req_mode) {
1561 /* bug 11300: the lock has already been granted */
1562 unlock_res_and_lock(lock);
1563 LDLM_DEBUG(lock, "Double grant race happened");
1564 LDLM_LOCK_RELEASE(lock);
1569 /* If we receive the completion AST before the actual enqueue returned,
1570 * then we might need to switch lock modes, resources, or extents. */
1571 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1572 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1573 LDLM_DEBUG(lock, "completion AST, new lock mode");
1576 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1577 ldlm_convert_policy_to_local(
1578 dlm_req->lock_desc.l_resource.lr_type,
1579 &dlm_req->lock_desc.l_policy_data,
1580 &lock->l_policy_data);
1581 LDLM_DEBUG(lock, "completion AST, new policy data");
1584 ldlm_resource_unlink_lock(lock);
1585 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1586 &lock->l_resource->lr_name,
1587 sizeof(lock->l_resource->lr_name)) != 0) {
1588 unlock_res_and_lock(lock);
1589 if (ldlm_lock_change_resource(ns, lock,
1590 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1591 LDLM_ERROR(lock, "Failed to allocate resource");
1592 LDLM_LOCK_RELEASE(lock);
1596 LDLM_DEBUG(lock, "completion AST, new resource");
1597 CERROR("change resource!\n");
1598 lock_res_and_lock(lock);
1601 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1602 /* BL_AST locks are not needed in lru.
1603 * let ldlm_cancel_lru() be fast. */
1604 ldlm_lock_remove_from_lru(lock);
1605 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1606 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1609 if (lock->l_lvb_len) {
1610 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1611 RCL_CLIENT) < lock->l_lvb_len) {
1612 LDLM_ERROR(lock, "completion AST did not contain "
1615 void *lvb = req_capsule_client_get(&req->rq_pill,
1617 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1621 ldlm_grant_lock(lock, &ast_list);
1622 unlock_res_and_lock(lock);
1624 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1626 /* Let Enqueue to call osc_lock_upcall() and initialize
1628 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2);
1630 ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST);
1632 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1634 LDLM_LOCK_RELEASE(lock);
1638 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1639 struct ldlm_namespace *ns,
1640 struct ldlm_request *dlm_req,
1641 struct ldlm_lock *lock)
1646 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1648 if (lock->l_glimpse_ast != NULL)
1649 rc = lock->l_glimpse_ast(lock, req);
1651 if (req->rq_repmsg != NULL) {
1654 req->rq_status = rc;
1658 lock_res_and_lock(lock);
1659 if (lock->l_granted_mode == LCK_PW &&
1660 !lock->l_readers && !lock->l_writers &&
1661 cfs_time_after(cfs_time_current(),
1662 cfs_time_add(lock->l_last_used,
1663 cfs_time_seconds(10)))) {
1664 unlock_res_and_lock(lock);
1665 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1666 ldlm_handle_bl_callback(ns, NULL, lock);
1671 unlock_res_and_lock(lock);
1672 LDLM_LOCK_RELEASE(lock);
1676 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1678 if (req->rq_no_reply)
1681 req->rq_status = rc;
1682 if (!req->rq_packed_final) {
1683 rc = lustre_pack_reply(req, 1, NULL, NULL);
1687 return ptlrpc_reply(req);
1691 static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
1693 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1696 cfs_spin_lock(&blp->blp_lock);
1697 if (blwi->blwi_lock && blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
1698 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1699 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1701 /* other blocking callbacks are added to the regular list */
1702 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1704 cfs_spin_unlock(&blp->blp_lock);
1706 cfs_waitq_signal(&blp->blp_waitq);
1708 /* can not use blwi->blwi_mode as blwi could be already freed in
1710 if (mode == LDLM_SYNC)
1711 cfs_wait_for_completion(&blwi->blwi_comp);
1716 static inline void init_blwi(struct ldlm_bl_work_item *blwi,
1717 struct ldlm_namespace *ns,
1718 struct ldlm_lock_desc *ld,
1719 cfs_list_t *cancels, int count,
1720 struct ldlm_lock *lock,
1723 cfs_init_completion(&blwi->blwi_comp);
1724 CFS_INIT_LIST_HEAD(&blwi->blwi_head);
1726 if (cfs_memory_pressure_get())
1727 blwi->blwi_mem_pressure = 1;
1730 blwi->blwi_mode = mode;
1732 blwi->blwi_ld = *ld;
1734 cfs_list_add(&blwi->blwi_head, cancels);
1735 cfs_list_del_init(cancels);
1736 blwi->blwi_count = count;
1738 blwi->blwi_lock = lock;
1742 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1743 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1744 cfs_list_t *cancels, int count, int mode)
1748 if (cancels && count == 0)
1751 if (mode == LDLM_SYNC) {
1752 /* if it is synchronous call do minimum mem alloc, as it could
1753 * be triggered from kernel shrinker
1755 struct ldlm_bl_work_item blwi;
1756 memset(&blwi, 0, sizeof(blwi));
1757 init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
1758 RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
1760 struct ldlm_bl_work_item *blwi;
1761 OBD_ALLOC(blwi, sizeof(*blwi));
1764 init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
1766 RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
1772 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1773 struct ldlm_lock *lock)
1776 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
1782 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1783 cfs_list_t *cancels, int count, int mode)
1786 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
1792 /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
1793 static int ldlm_handle_setinfo(struct ptlrpc_request *req)
1795 struct obd_device *obd = req->rq_export->exp_obd;
1802 DEBUG_REQ(D_HSM, req, "%s: handle setinfo\n", obd->obd_name);
1804 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
1806 key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1808 DEBUG_REQ(D_IOCTL, req, "no set_info key");
1811 keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1813 val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1815 DEBUG_REQ(D_IOCTL, req, "no set_info val");
1818 vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1821 /* We are responsible for swabbing contents of val */
1823 if (KEY_IS(KEY_HSM_COPYTOOL_SEND))
1824 /* Pass it on to mdc (the "export" in this case) */
1825 rc = obd_set_info_async(req->rq_export,
1826 sizeof(KEY_HSM_COPYTOOL_SEND),
1827 KEY_HSM_COPYTOOL_SEND,
1830 DEBUG_REQ(D_WARNING, req, "ignoring unknown key %s", key);
1835 static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
1836 const char *msg, int rc,
1837 struct lustre_handle *handle)
1839 DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
1840 "%s: [nid %s] [rc %d] [lock "LPX64"]",
1841 msg, libcfs_id2str(req->rq_peer), rc,
1842 handle ? handle->cookie : 0);
1843 if (req->rq_no_reply)
1844 CWARN("No reply was sent, maybe cause bug 21636.\n");
1846 CWARN("Send reply failed, maybe cause bug 21636.\n");
1849 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1850 static int ldlm_callback_handler(struct ptlrpc_request *req)
1852 struct ldlm_namespace *ns;
1853 struct ldlm_request *dlm_req;
1854 struct ldlm_lock *lock;
1858 /* Requests arrive in sender's byte order. The ptlrpc service
1859 * handler has already checked and, if necessary, byte-swapped the
1860 * incoming request message body, but I am responsible for the
1861 * message buffers. */
1863 /* do nothing for sec context finalize */
1864 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1867 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1869 if (req->rq_export == NULL) {
1870 rc = ldlm_callback_reply(req, -ENOTCONN);
1871 ldlm_callback_errmsg(req, "Operate on unconnected server",
1876 LASSERT(req->rq_export != NULL);
1877 LASSERT(req->rq_export->exp_obd != NULL);
1879 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1880 case LDLM_BL_CALLBACK:
1881 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1884 case LDLM_CP_CALLBACK:
1885 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1888 case LDLM_GL_CALLBACK:
1889 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1893 rc = ldlm_handle_setinfo(req);
1894 ldlm_callback_reply(req, rc);
1896 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1897 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
1898 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1899 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1901 rc = llog_origin_handle_cancel(req);
1902 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1904 ldlm_callback_reply(req, rc);
1906 case OBD_QC_CALLBACK:
1907 req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
1908 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
1910 rc = target_handle_qc_callback(req);
1911 ldlm_callback_reply(req, rc);
1915 /* reply in handler */
1916 req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
1917 rc = target_handle_dqacq_callback(req);
1919 case LLOG_ORIGIN_HANDLE_CREATE:
1920 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1921 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1923 rc = llog_origin_handle_create(req);
1924 ldlm_callback_reply(req, rc);
1926 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1927 req_capsule_set(&req->rq_pill,
1928 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1929 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1931 rc = llog_origin_handle_next_block(req);
1932 ldlm_callback_reply(req, rc);
1934 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1935 req_capsule_set(&req->rq_pill,
1936 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1937 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1939 rc = llog_origin_handle_read_header(req);
1940 ldlm_callback_reply(req, rc);
1942 case LLOG_ORIGIN_HANDLE_CLOSE:
1943 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1945 rc = llog_origin_handle_close(req);
1946 ldlm_callback_reply(req, rc);
1949 CERROR("unknown opcode %u\n",
1950 lustre_msg_get_opc(req->rq_reqmsg));
1951 ldlm_callback_reply(req, -EPROTO);
1955 ns = req->rq_export->exp_obd->obd_namespace;
1956 LASSERT(ns != NULL);
1958 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1960 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1961 if (dlm_req == NULL) {
1962 rc = ldlm_callback_reply(req, -EPROTO);
1963 ldlm_callback_errmsg(req, "Operate without parameter", rc,
1968 /* Force a known safe race, send a cancel to the server for a lock
1969 * which the server has already started a blocking callback on. */
1970 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
1971 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1972 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
1974 CERROR("ldlm_cli_cancel: %d\n", rc);
1977 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
1979 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
1980 "disappeared\n", dlm_req->lock_handle[0].cookie);
1981 rc = ldlm_callback_reply(req, -EINVAL);
1982 ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
1983 &dlm_req->lock_handle[0]);
1987 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
1988 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
1989 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
1991 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1992 lock_res_and_lock(lock);
1993 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1994 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1995 /* If somebody cancels lock and cache is already dropped,
1996 * or lock is failed before cp_ast received on client,
1997 * we can tell the server we have no lock. Otherwise, we
1998 * should send cancel after dropping the cache. */
1999 if (((lock->l_flags & LDLM_FL_CANCELING) &&
2000 (lock->l_flags & LDLM_FL_BL_DONE)) ||
2001 (lock->l_flags & LDLM_FL_FAILED)) {
2002 LDLM_DEBUG(lock, "callback on lock "
2003 LPX64" - lock disappeared\n",
2004 dlm_req->lock_handle[0].cookie);
2005 unlock_res_and_lock(lock);
2006 LDLM_LOCK_RELEASE(lock);
2007 rc = ldlm_callback_reply(req, -EINVAL);
2008 ldlm_callback_errmsg(req, "Operate on stale lock", rc,
2009 &dlm_req->lock_handle[0]);
2012 /* BL_AST locks are not needed in lru.
2013 * let ldlm_cancel_lru() be fast. */
2014 ldlm_lock_remove_from_lru(lock);
2015 lock->l_flags |= LDLM_FL_BL_AST;
2017 unlock_res_and_lock(lock);
2019 /* We want the ost thread to get this reply so that it can respond
2020 * to ost requests (write cache writeback) that might be triggered
2023 * But we'd also like to be able to indicate in the reply that we're
2024 * cancelling right now, because it's unused, or have an intent result
2025 * in the reply, so we might have to push the responsibility for sending
2026 * the reply down into the AST handlers, alas. */
2028 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2029 case LDLM_BL_CALLBACK:
2030 CDEBUG(D_INODE, "blocking ast\n");
2031 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
2032 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
2033 rc = ldlm_callback_reply(req, 0);
2034 if (req->rq_no_reply || rc)
2035 ldlm_callback_errmsg(req, "Normal process", rc,
2036 &dlm_req->lock_handle[0]);
2038 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
2039 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
2041 case LDLM_CP_CALLBACK:
2042 CDEBUG(D_INODE, "completion ast\n");
2043 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
2044 ldlm_callback_reply(req, 0);
2045 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
2047 case LDLM_GL_CALLBACK:
2048 CDEBUG(D_INODE, "glimpse ast\n");
2049 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
2050 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
2053 LBUG(); /* checked above */
2059 static int ldlm_cancel_handler(struct ptlrpc_request *req)
2064 /* Requests arrive in sender's byte order. The ptlrpc service
2065 * handler has already checked and, if necessary, byte-swapped the
2066 * incoming request message body, but I am responsible for the
2067 * message buffers. */
2069 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2071 if (req->rq_export == NULL) {
2072 struct ldlm_request *dlm_req;
2074 CERROR("%s from %s arrived at %lu with bad export cookie "
2076 ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
2077 libcfs_nid2str(req->rq_peer.nid),
2078 req->rq_arrival_time.tv_sec,
2079 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
2081 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_CANCEL) {
2082 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2083 dlm_req = req_capsule_client_get(&req->rq_pill,
2085 if (dlm_req != NULL)
2086 ldlm_lock_dump_handle(D_ERROR,
2087 &dlm_req->lock_handle[0]);
2089 ldlm_callback_reply(req, -ENOTCONN);
2093 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2095 /* XXX FIXME move this back to mds/handler.c, bug 249 */
2097 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2098 CDEBUG(D_INODE, "cancel\n");
2099 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
2101 rc = ldlm_handle_cancel(req);
2105 case OBD_LOG_CANCEL:
2106 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2107 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2109 rc = llog_origin_handle_cancel(req);
2110 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2112 ldlm_callback_reply(req, rc);
2115 CERROR("invalid opcode %d\n",
2116 lustre_msg_get_opc(req->rq_reqmsg));
2117 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2118 ldlm_callback_reply(req, -EINVAL);
2124 static int ldlm_cancel_hpreq_lock_match(struct ptlrpc_request *req,
2125 struct ldlm_lock *lock)
2127 struct ldlm_request *dlm_req;
2128 struct lustre_handle lockh;
2133 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2134 if (dlm_req == NULL)
2137 ldlm_lock2handle(lock, &lockh);
2138 for (i = 0; i < dlm_req->lock_count; i++) {
2139 if (lustre_handle_equal(&dlm_req->lock_handle[i],
2141 DEBUG_REQ(D_RPCTRACE, req,
2142 "Prio raised by lock "LPX64".", lockh.cookie);
2153 static int ldlm_cancel_hpreq_check(struct ptlrpc_request *req)
2155 struct ldlm_request *dlm_req;
2160 /* no prolong in recovery */
2161 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
2164 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2165 if (dlm_req == NULL)
2168 for (i = 0; i < dlm_req->lock_count; i++) {
2169 struct ldlm_lock *lock;
2171 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
2175 rc = !!(lock->l_flags & LDLM_FL_AST_SENT);
2177 LDLM_DEBUG(lock, "hpreq cancel lock");
2178 LDLM_LOCK_PUT(lock);
2187 static struct ptlrpc_hpreq_ops ldlm_cancel_hpreq_ops = {
2188 .hpreq_lock_match = ldlm_cancel_hpreq_lock_match,
2189 .hpreq_check = ldlm_cancel_hpreq_check
2192 static int ldlm_hpreq_handler(struct ptlrpc_request *req)
2196 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2198 if (req->rq_export == NULL)
2201 if (LDLM_CANCEL == lustre_msg_get_opc(req->rq_reqmsg)) {
2202 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2203 req->rq_ops = &ldlm_cancel_hpreq_ops;
2208 int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2209 cfs_hlist_node_t *hnode, void *data)
2212 cfs_list_t *rpc_list = data;
2213 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2215 lock_res_and_lock(lock);
2217 if (lock->l_req_mode != lock->l_granted_mode) {
2218 unlock_res_and_lock(lock);
2222 LASSERT(lock->l_resource);
2223 if (lock->l_resource->lr_type != LDLM_IBITS &&
2224 lock->l_resource->lr_type != LDLM_PLAIN) {
2225 unlock_res_and_lock(lock);
2229 if (lock->l_flags & LDLM_FL_AST_SENT) {
2230 unlock_res_and_lock(lock);
2234 LASSERT(lock->l_blocking_ast);
2235 LASSERT(!lock->l_blocking_lock);
2237 lock->l_flags |= LDLM_FL_AST_SENT;
2238 if (lock->l_export && lock->l_export->exp_lock_hash &&
2239 !cfs_hlist_unhashed(&lock->l_exp_hash))
2240 cfs_hash_del(lock->l_export->exp_lock_hash,
2241 &lock->l_remote_handle, &lock->l_exp_hash);
2242 cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
2243 LDLM_LOCK_GET(lock);
2245 unlock_res_and_lock(lock);
2249 void ldlm_revoke_export_locks(struct obd_export *exp)
2251 cfs_list_t rpc_list;
2254 CFS_INIT_LIST_HEAD(&rpc_list);
2255 cfs_hash_for_each_empty(exp->exp_lock_hash,
2256 ldlm_revoke_lock_cb, &rpc_list);
2257 ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
2258 LDLM_WORK_REVOKE_AST);
2264 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
2266 struct ldlm_bl_work_item *blwi = NULL;
2267 static unsigned int num_bl = 0;
2269 cfs_spin_lock(&blp->blp_lock);
2270 /* process a request from the blp_list at least every blp_num_threads */
2271 if (!cfs_list_empty(&blp->blp_list) &&
2272 (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
2273 blwi = cfs_list_entry(blp->blp_list.next,
2274 struct ldlm_bl_work_item, blwi_entry);
2276 if (!cfs_list_empty(&blp->blp_prio_list))
2277 blwi = cfs_list_entry(blp->blp_prio_list.next,
2278 struct ldlm_bl_work_item,
2282 if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
2284 cfs_list_del(&blwi->blwi_entry);
2286 cfs_spin_unlock(&blp->blp_lock);
2291 /* This only contains temporary data until the thread starts */
2292 struct ldlm_bl_thread_data {
2293 char bltd_name[CFS_CURPROC_COMM_MAX];
2294 struct ldlm_bl_pool *bltd_blp;
2295 cfs_completion_t bltd_comp;
2299 static int ldlm_bl_thread_main(void *arg);
2301 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2303 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2306 cfs_init_completion(&bltd.bltd_comp);
2307 rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
2309 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2310 cfs_atomic_read(&blp->blp_num_threads), rc);
2313 cfs_wait_for_completion(&bltd.bltd_comp);
2318 static int ldlm_bl_thread_main(void *arg)
2320 struct ldlm_bl_pool *blp;
2324 struct ldlm_bl_thread_data *bltd = arg;
2326 blp = bltd->bltd_blp;
2329 cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
2330 cfs_atomic_inc(&blp->blp_busy_threads);
2332 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2333 "ldlm_bl_%02d", bltd->bltd_num);
2334 cfs_daemonize(bltd->bltd_name);
2336 cfs_complete(&bltd->bltd_comp);
2337 /* cannot use bltd after this, it is only on caller's stack */
2341 struct l_wait_info lwi = { 0 };
2342 struct ldlm_bl_work_item *blwi = NULL;
2345 blwi = ldlm_bl_get_work(blp);
2348 cfs_atomic_dec(&blp->blp_busy_threads);
2349 l_wait_event_exclusive(blp->blp_waitq,
2350 (blwi = ldlm_bl_get_work(blp)) != NULL,
2352 busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
2354 busy = cfs_atomic_read(&blp->blp_busy_threads);
2357 if (blwi->blwi_ns == NULL)
2358 /* added by ldlm_cleanup() */
2361 /* Not fatal if racy and have a few too many threads */
2362 if (unlikely(busy < blp->blp_max_threads &&
2363 busy >= cfs_atomic_read(&blp->blp_num_threads) &&
2364 !blwi->blwi_mem_pressure))
2365 /* discard the return value, we tried */
2366 ldlm_bl_thread_start(blp);
2368 if (blwi->blwi_mem_pressure)
2369 cfs_memory_pressure_set();
2371 if (blwi->blwi_count) {
2373 /* The special case when we cancel locks in lru
2374 * asynchronously, we pass the list of locks here.
2375 * Thus locks are marked LDLM_FL_CANCELING, but NOT
2376 * canceled locally yet. */
2377 count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
2380 ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
2382 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2385 if (blwi->blwi_mem_pressure)
2386 cfs_memory_pressure_clr();
2388 if (blwi->blwi_mode == LDLM_ASYNC)
2389 OBD_FREE(blwi, sizeof(*blwi));
2391 cfs_complete(&blwi->blwi_comp);
2394 cfs_atomic_dec(&blp->blp_busy_threads);
2395 cfs_atomic_dec(&blp->blp_num_threads);
2396 cfs_complete(&blp->blp_comp);
2402 static int ldlm_setup(void);
2403 static int ldlm_cleanup(void);
2405 int ldlm_get_ref(void)
2409 cfs_mutex_down(&ldlm_ref_sem);
2410 if (++ldlm_refcount == 1) {
2415 cfs_mutex_up(&ldlm_ref_sem);
2420 void ldlm_put_ref(void)
2423 cfs_mutex_down(&ldlm_ref_sem);
2424 if (ldlm_refcount == 1) {
2425 int rc = ldlm_cleanup();
2427 CERROR("ldlm_cleanup failed: %d\n", rc);
2433 cfs_mutex_up(&ldlm_ref_sem);
2439 * Export handle<->lock hash operations.
2442 ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2444 return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2448 ldlm_export_lock_key(cfs_hlist_node_t *hnode)
2450 struct ldlm_lock *lock;
2452 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2453 return &lock->l_remote_handle;
2457 ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
2459 struct ldlm_lock *lock;
2461 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2462 lock->l_remote_handle = *(struct lustre_handle *)key;
2466 ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
2468 return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
2472 ldlm_export_lock_object(cfs_hlist_node_t *hnode)
2474 return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2478 ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2480 struct ldlm_lock *lock;
2482 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2483 LDLM_LOCK_GET(lock);
2487 ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2489 struct ldlm_lock *lock;
2491 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2492 LDLM_LOCK_RELEASE(lock);
2495 static cfs_hash_ops_t ldlm_export_lock_ops = {
2496 .hs_hash = ldlm_export_lock_hash,
2497 .hs_key = ldlm_export_lock_key,
2498 .hs_keycmp = ldlm_export_lock_keycmp,
2499 .hs_keycpy = ldlm_export_lock_keycpy,
2500 .hs_object = ldlm_export_lock_object,
2501 .hs_get = ldlm_export_lock_get,
2502 .hs_put = ldlm_export_lock_put,
2503 .hs_put_locked = ldlm_export_lock_put,
2506 int ldlm_init_export(struct obd_export *exp)
2510 exp->exp_lock_hash =
2511 cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
2512 HASH_EXP_LOCK_CUR_BITS,
2513 HASH_EXP_LOCK_MAX_BITS,
2514 HASH_EXP_LOCK_BKT_BITS, 0,
2515 CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
2516 &ldlm_export_lock_ops,
2517 CFS_HASH_DEFAULT | CFS_HASH_REHASH_KEY |
2518 CFS_HASH_NBLK_CHANGE);
2520 if (!exp->exp_lock_hash)
2525 EXPORT_SYMBOL(ldlm_init_export);
2527 void ldlm_destroy_export(struct obd_export *exp)
2530 cfs_hash_putref(exp->exp_lock_hash);
2531 exp->exp_lock_hash = NULL;
2534 EXPORT_SYMBOL(ldlm_destroy_export);
2536 static int ldlm_setup(void)
2538 struct ldlm_bl_pool *blp;
2540 int ldlm_min_threads = LDLM_THREADS_AUTO_MIN;
2541 int ldlm_max_threads = LDLM_THREADS_AUTO_MAX;
2547 if (ldlm_state != NULL)
2550 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2551 if (ldlm_state == NULL)
2555 rc = ldlm_proc_setup();
2561 if (ldlm_num_threads) {
2562 /* If ldlm_num_threads is set, it is the min and the max. */
2563 if (ldlm_num_threads > LDLM_THREADS_AUTO_MAX)
2564 ldlm_num_threads = LDLM_THREADS_AUTO_MAX;
2565 if (ldlm_num_threads < LDLM_THREADS_AUTO_MIN)
2566 ldlm_num_threads = LDLM_THREADS_AUTO_MIN;
2567 ldlm_min_threads = ldlm_max_threads = ldlm_num_threads;
2571 ldlm_state->ldlm_cb_service =
2572 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2573 LDLM_MAXREPSIZE, LDLM_CB_REQUEST_PORTAL,
2574 LDLM_CB_REPLY_PORTAL, 2,
2575 ldlm_callback_handler, "ldlm_cbd",
2576 ldlm_svc_proc_dir, NULL,
2577 ldlm_min_threads, ldlm_max_threads,
2579 LCT_MD_THREAD|LCT_DT_THREAD, NULL);
2581 if (!ldlm_state->ldlm_cb_service) {
2582 CERROR("failed to start service\n");
2583 GOTO(out_proc, rc = -ENOMEM);
2586 ldlm_state->ldlm_cancel_service =
2587 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2588 LDLM_MAXREPSIZE, LDLM_CANCEL_REQUEST_PORTAL,
2589 LDLM_CANCEL_REPLY_PORTAL, 6,
2590 ldlm_cancel_handler, "ldlm_canceld",
2591 ldlm_svc_proc_dir, NULL,
2592 ldlm_min_threads, ldlm_max_threads,
2594 LCT_MD_THREAD|LCT_DT_THREAD|LCT_CL_THREAD,
2595 ldlm_hpreq_handler);
2597 if (!ldlm_state->ldlm_cancel_service) {
2598 CERROR("failed to start service\n");
2599 GOTO(out_proc, rc = -ENOMEM);
2602 OBD_ALLOC(blp, sizeof(*blp));
2604 GOTO(out_proc, rc = -ENOMEM);
2605 ldlm_state->ldlm_bl_pool = blp;
2607 cfs_spin_lock_init(&blp->blp_lock);
2608 CFS_INIT_LIST_HEAD(&blp->blp_list);
2609 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2610 cfs_waitq_init(&blp->blp_waitq);
2611 cfs_atomic_set(&blp->blp_num_threads, 0);
2612 cfs_atomic_set(&blp->blp_busy_threads, 0);
2613 blp->blp_min_threads = ldlm_min_threads;
2614 blp->blp_max_threads = ldlm_max_threads;
2617 for (i = 0; i < blp->blp_min_threads; i++) {
2618 rc = ldlm_bl_thread_start(blp);
2620 GOTO(out_thread, rc);
2623 rc = ptlrpc_start_threads(ldlm_state->ldlm_cancel_service);
2625 GOTO(out_thread, rc);
2627 rc = ptlrpc_start_threads(ldlm_state->ldlm_cb_service);
2629 GOTO(out_thread, rc);
2631 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2632 expired_lock_thread.elt_state = ELT_STOPPED;
2633 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2635 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2636 cfs_spin_lock_init(&waiting_locks_spinlock);
2637 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2639 rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
2641 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2642 GOTO(out_thread, rc);
2645 cfs_wait_event(expired_lock_thread.elt_waitq,
2646 expired_lock_thread.elt_state == ELT_READY);
2650 rc = ldlm_pools_init();
2652 GOTO(out_thread, rc);
2658 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2659 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2664 ldlm_proc_cleanup();
2667 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2672 static int ldlm_cleanup(void)
2675 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2679 if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2680 !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2681 CERROR("ldlm still has namespaces; clean these up first.\n");
2682 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2683 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2692 while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
2693 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2695 cfs_init_completion(&blp->blp_comp);
2697 cfs_spin_lock(&blp->blp_lock);
2698 cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2699 cfs_waitq_signal(&blp->blp_waitq);
2700 cfs_spin_unlock(&blp->blp_lock);
2702 cfs_wait_for_completion(&blp->blp_comp);
2704 OBD_FREE(blp, sizeof(*blp));
2706 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2707 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2708 ldlm_proc_cleanup();
2710 expired_lock_thread.elt_state = ELT_TERMINATE;
2711 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2712 cfs_wait_event(expired_lock_thread.elt_waitq,
2713 expired_lock_thread.elt_state == ELT_STOPPED);
2715 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2716 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2719 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2727 cfs_init_mutex(&ldlm_ref_sem);
2728 cfs_init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2729 cfs_init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2730 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2731 sizeof(struct ldlm_resource), 0,
2732 CFS_SLAB_HWCACHE_ALIGN);
2733 if (ldlm_resource_slab == NULL)
2736 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2737 sizeof(struct ldlm_lock), 0,
2738 CFS_SLAB_HWCACHE_ALIGN | CFS_SLAB_DESTROY_BY_RCU);
2739 if (ldlm_lock_slab == NULL) {
2740 cfs_mem_cache_destroy(ldlm_resource_slab);
2744 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2745 sizeof(struct ldlm_interval),
2746 0, CFS_SLAB_HWCACHE_ALIGN);
2747 if (ldlm_interval_slab == NULL) {
2748 cfs_mem_cache_destroy(ldlm_resource_slab);
2749 cfs_mem_cache_destroy(ldlm_lock_slab);
2752 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2753 class_export_dump_hook = ldlm_dump_export_locks;
2758 void ldlm_exit(void)
2762 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2763 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2764 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2766 /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
2767 * synchronize_rcu() to wait a grace period elapsed, so that
2768 * ldlm_lock_free() get a chance to be called. */
2771 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2772 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2773 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2774 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2778 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2781 EXPORT_SYMBOL(ldlm_get_processing_policy);
2782 EXPORT_SYMBOL(ldlm_lock2desc);
2783 EXPORT_SYMBOL(ldlm_register_intent);
2784 EXPORT_SYMBOL(ldlm_lockname);
2785 EXPORT_SYMBOL(ldlm_typename);
2786 EXPORT_SYMBOL(ldlm_lock2handle);
2787 EXPORT_SYMBOL(__ldlm_handle2lock);
2788 EXPORT_SYMBOL(ldlm_lock_get);
2789 EXPORT_SYMBOL(ldlm_lock_put);
2790 EXPORT_SYMBOL(ldlm_lock_match);
2791 EXPORT_SYMBOL(ldlm_lock_cancel);
2792 EXPORT_SYMBOL(ldlm_lock_addref);
2793 EXPORT_SYMBOL(ldlm_lock_addref_try);
2794 EXPORT_SYMBOL(ldlm_lock_decref);
2795 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2796 EXPORT_SYMBOL(ldlm_lock_change_resource);
2797 EXPORT_SYMBOL(ldlm_it2str);
2798 EXPORT_SYMBOL(ldlm_lock_dump);
2799 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2800 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2801 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
2802 EXPORT_SYMBOL(ldlm_lock_allow_match);
2803 EXPORT_SYMBOL(ldlm_lock_downgrade);
2804 EXPORT_SYMBOL(ldlm_lock_convert);
2806 /* ldlm_request.c */
2807 EXPORT_SYMBOL(ldlm_completion_ast_async);
2808 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2809 EXPORT_SYMBOL(ldlm_completion_ast);
2810 EXPORT_SYMBOL(ldlm_blocking_ast);
2811 EXPORT_SYMBOL(ldlm_glimpse_ast);
2812 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2813 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2814 EXPORT_SYMBOL(ldlm_prep_elc_req);
2815 EXPORT_SYMBOL(ldlm_cli_convert);
2816 EXPORT_SYMBOL(ldlm_cli_enqueue);
2817 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2818 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2819 EXPORT_SYMBOL(ldlm_cli_cancel);
2820 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2821 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2822 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2823 EXPORT_SYMBOL(ldlm_replay_locks);
2824 EXPORT_SYMBOL(ldlm_resource_foreach);
2825 EXPORT_SYMBOL(ldlm_namespace_foreach);
2826 EXPORT_SYMBOL(ldlm_resource_iterate);
2827 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2828 EXPORT_SYMBOL(ldlm_cli_cancel_list_local);
2829 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2832 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2833 EXPORT_SYMBOL(ldlm_server_completion_ast);
2834 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2835 EXPORT_SYMBOL(ldlm_handle_enqueue);
2836 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2837 EXPORT_SYMBOL(ldlm_handle_cancel);
2838 EXPORT_SYMBOL(ldlm_request_cancel);
2839 EXPORT_SYMBOL(ldlm_handle_convert);
2840 EXPORT_SYMBOL(ldlm_handle_convert0);
2841 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2842 EXPORT_SYMBOL(ldlm_get_ref);
2843 EXPORT_SYMBOL(ldlm_put_ref);
2844 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2845 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2847 /* ldlm_resource.c */
2848 EXPORT_SYMBOL(ldlm_namespace_new);
2849 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2850 EXPORT_SYMBOL(ldlm_namespace_free);
2851 EXPORT_SYMBOL(ldlm_namespace_dump);
2852 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2853 EXPORT_SYMBOL(ldlm_resource_get);
2854 EXPORT_SYMBOL(ldlm_resource_putref);
2855 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2858 EXPORT_SYMBOL(client_import_add_conn);
2859 EXPORT_SYMBOL(client_import_del_conn);
2860 EXPORT_SYMBOL(client_obd_setup);
2861 EXPORT_SYMBOL(client_obd_cleanup);
2862 EXPORT_SYMBOL(client_connect_import);
2863 EXPORT_SYMBOL(client_disconnect_export);
2864 EXPORT_SYMBOL(server_disconnect_export);
2865 EXPORT_SYMBOL(target_stop_recovery_thread);
2866 EXPORT_SYMBOL(target_handle_connect);
2867 EXPORT_SYMBOL(target_cleanup_recovery);
2868 EXPORT_SYMBOL(target_destroy_export);
2869 EXPORT_SYMBOL(target_cancel_recovery_timer);
2870 EXPORT_SYMBOL(target_send_reply);
2871 EXPORT_SYMBOL(target_queue_recovery_request);
2872 EXPORT_SYMBOL(target_handle_ping);
2873 EXPORT_SYMBOL(target_pack_pool_reply);
2874 EXPORT_SYMBOL(target_handle_disconnect);
2877 EXPORT_SYMBOL(lock_res_and_lock);
2878 EXPORT_SYMBOL(unlock_res_and_lock);