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_mutex_t ldlm_ref_mutex;
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 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
570 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
574 #endif /* __KERNEL__ */
576 #ifdef HAVE_SERVER_SUPPORT
578 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
580 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
585 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
586 const char *ast_type)
588 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
589 "to a lock %s callback time out: rc %d\n",
590 lock->l_export->exp_obd->obd_name,
591 obd_export_nid2str(lock->l_export), ast_type, rc);
593 if (obd_dump_on_timeout)
594 libcfs_debug_dumplog();
596 cfs_spin_lock_bh(&waiting_locks_spinlock);
597 if (__ldlm_del_waiting_lock(lock) == 0)
598 /* the lock was not in any list, grab an extra ref before adding
599 * the lock to the expired list */
601 cfs_list_add(&lock->l_pending_chain,
602 &expired_lock_thread.elt_expired_locks);
603 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
604 cfs_spin_unlock_bh(&waiting_locks_spinlock);
606 class_fail_export(lock->l_export);
610 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
611 struct ptlrpc_request *req, int rc,
612 const char *ast_type)
614 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
616 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
617 LASSERT(lock->l_export);
618 if (lock->l_export->exp_libclient) {
619 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
620 " timeout, just cancelling lock", ast_type,
621 libcfs_nid2str(peer.nid));
622 ldlm_lock_cancel(lock);
624 } else if (lock->l_flags & LDLM_FL_CANCEL) {
625 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
626 "cancel was received (AST reply lost?)",
627 ast_type, libcfs_nid2str(peer.nid));
628 ldlm_lock_cancel(lock);
631 ldlm_del_waiting_lock(lock);
632 ldlm_failed_ast(lock, rc, ast_type);
636 struct ldlm_resource *res = lock->l_resource;
637 LDLM_DEBUG(lock, "client (nid %s) returned %d"
638 " from %s AST - normal race",
639 libcfs_nid2str(peer.nid),
641 lustre_msg_get_status(req->rq_repmsg) : -1,
644 /* update lvbo to return proper attributes.
646 ldlm_resource_getref(res);
647 ldlm_res_lvbo_update(res, NULL, 1);
648 ldlm_resource_putref(res);
652 LDLM_ERROR(lock, "client (nid %s) returned %d "
653 "from %s AST", libcfs_nid2str(peer.nid),
654 (req->rq_repmsg != NULL) ?
655 lustre_msg_get_status(req->rq_repmsg) : 0,
658 ldlm_lock_cancel(lock);
659 /* Server-side AST functions are called from ldlm_reprocess_all,
660 * which needs to be told to please restart its reprocessing. */
667 static int ldlm_cb_interpret(const struct lu_env *env,
668 struct ptlrpc_request *req, void *data, int rc)
670 struct ldlm_cb_async_args *ca = data;
671 struct ldlm_lock *lock = ca->ca_lock;
672 struct ldlm_cb_set_arg *arg = ca->ca_set_arg;
675 LASSERT(lock != NULL);
677 rc = ldlm_handle_ast_error(lock, req, rc,
678 arg->type == LDLM_BL_CALLBACK
679 ? "blocking" : "completion");
681 cfs_atomic_inc(&arg->restart);
683 LDLM_LOCK_RELEASE(lock);
685 if (cfs_atomic_dec_return(&arg->rpcs) < arg->threshold)
686 cfs_waitq_signal(&arg->waitq);
692 static inline int ldlm_bl_and_cp_ast_tail(struct ptlrpc_request *req,
693 struct ldlm_cb_set_arg *arg,
694 struct ldlm_lock *lock,
700 if (unlikely(instant_cancel)) {
701 rc = ptl_send_rpc(req, 1);
702 ptlrpc_req_finished(req);
704 cfs_atomic_inc(&arg->restart);
707 cfs_atomic_inc(&arg->rpcs);
708 cfs_atomic_inc(&arg->refcount);
709 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
716 * Check if there are requests in the export request list which prevent
717 * the lock canceling and make these requests high priority ones.
719 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
721 struct ptlrpc_request *req;
724 if (lock->l_export == NULL) {
725 LDLM_DEBUG(lock, "client lock: no-op");
729 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
730 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
732 /* Do not process requests that were not yet added to there
733 * incoming queue or were already removed from there for
735 if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
736 req->rq_ops->hpreq_lock_match &&
737 req->rq_ops->hpreq_lock_match(req, lock))
738 ptlrpc_hpreq_reorder(req);
740 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
745 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
746 * enqueued server lock conflicts with given one.
748 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
749 * to wait for client response.
751 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
752 struct ldlm_lock_desc *desc,
753 void *data, int flag)
755 struct ldlm_cb_async_args *ca;
756 struct ldlm_cb_set_arg *arg = data;
757 struct ldlm_request *body;
758 struct ptlrpc_request *req;
759 int instant_cancel = 0;
763 if (flag == LDLM_CB_CANCELING)
764 /* Don't need to do anything here. */
768 LASSERT(data != NULL);
769 if (lock->l_export->exp_obd->obd_recovering != 0) {
770 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
771 ldlm_lock_dump(D_ERROR, lock, 0);
774 ldlm_lock_reorder_req(lock);
776 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
777 &RQF_LDLM_BL_CALLBACK,
778 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
782 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
783 ca = ptlrpc_req_async_args(req);
784 ca->ca_set_arg = arg;
787 req->rq_interpret_reply = ldlm_cb_interpret;
788 req->rq_no_resend = 1;
790 lock_res(lock->l_resource);
791 if (lock->l_granted_mode != lock->l_req_mode) {
792 /* this blocking AST will be communicated as part of the
793 * completion AST instead */
794 unlock_res(lock->l_resource);
795 ptlrpc_req_finished(req);
796 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
800 if (lock->l_destroyed) {
801 /* What's the point? */
802 unlock_res(lock->l_resource);
803 ptlrpc_req_finished(req);
807 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
810 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
811 body->lock_handle[0] = lock->l_remote_handle;
812 body->lock_desc = *desc;
813 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
815 LDLM_DEBUG(lock, "server preparing blocking AST");
817 ptlrpc_request_set_replen(req);
818 if (instant_cancel) {
819 unlock_res(lock->l_resource);
820 ldlm_lock_cancel(lock);
822 LASSERT(lock->l_granted_mode == lock->l_req_mode);
823 ldlm_add_waiting_lock(lock);
824 unlock_res(lock->l_resource);
827 req->rq_send_state = LUSTRE_IMP_FULL;
828 /* ptlrpc_request_alloc_pack already set timeout */
830 req->rq_timeout = ldlm_get_rq_timeout();
832 if (lock->l_export && lock->l_export->exp_nid_stats &&
833 lock->l_export->exp_nid_stats->nid_ldlm_stats)
834 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
835 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
837 rc = ldlm_bl_and_cp_ast_tail(req, arg, lock, instant_cancel);
842 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
844 struct ldlm_cb_set_arg *arg = data;
845 struct ldlm_request *body;
846 struct ptlrpc_request *req;
847 struct ldlm_cb_async_args *ca;
848 long total_enqueue_wait;
849 int instant_cancel = 0;
853 LASSERT(lock != NULL);
854 LASSERT(data != NULL);
856 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
857 lock->l_last_activity);
859 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
860 &RQF_LDLM_CP_CALLBACK);
864 /* server namespace, doesn't need lock */
865 if (lock->l_resource->lr_lvb_len) {
866 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
867 lock->l_resource->lr_lvb_len);
870 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
872 ptlrpc_request_free(req);
876 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
877 ca = ptlrpc_req_async_args(req);
878 ca->ca_set_arg = arg;
881 req->rq_interpret_reply = ldlm_cb_interpret;
882 req->rq_no_resend = 1;
883 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
885 body->lock_handle[0] = lock->l_remote_handle;
886 body->lock_flags = flags;
887 ldlm_lock2desc(lock, &body->lock_desc);
888 if (lock->l_resource->lr_lvb_len) {
889 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
891 lock_res(lock->l_resource);
892 memcpy(lvb, lock->l_resource->lr_lvb_data,
893 lock->l_resource->lr_lvb_len);
894 unlock_res(lock->l_resource);
897 LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)",
900 /* Server-side enqueue wait time estimate, used in
901 __ldlm_add_waiting_lock to set future enqueue timers */
902 if (total_enqueue_wait < ldlm_get_enq_timeout(lock))
903 at_measured(ldlm_lock_to_ns_at(lock),
906 /* bz18618. Don't add lock enqueue time we spend waiting for a
907 previous callback to fail. Locks waiting legitimately will
908 get extended by ldlm_refresh_waiting_lock regardless of the
909 estimate, so it's okay to underestimate here. */
910 LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. "
911 "It is likely that a previous callback timed out.",
913 at_get(ldlm_lock_to_ns_at(lock)));
915 ptlrpc_request_set_replen(req);
917 req->rq_send_state = LUSTRE_IMP_FULL;
918 /* ptlrpc_request_pack already set timeout */
920 req->rq_timeout = ldlm_get_rq_timeout();
922 /* We only send real blocking ASTs after the lock is granted */
923 lock_res_and_lock(lock);
924 if (lock->l_flags & LDLM_FL_AST_SENT) {
925 body->lock_flags |= LDLM_FL_AST_SENT;
926 /* copy ast flags like LDLM_FL_DISCARD_DATA */
927 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
929 /* We might get here prior to ldlm_handle_enqueue setting
930 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
931 * into waiting list, but this is safe and similar code in
932 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
933 * that would not only cancel the lock, but will also remove
934 * it from waiting list */
935 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
936 unlock_res_and_lock(lock);
937 ldlm_lock_cancel(lock);
939 lock_res_and_lock(lock);
941 /* start the lock-timeout clock */
942 ldlm_add_waiting_lock(lock);
945 unlock_res_and_lock(lock);
947 if (lock->l_export && lock->l_export->exp_nid_stats &&
948 lock->l_export->exp_nid_stats->nid_ldlm_stats)
949 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
950 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
952 rc = ldlm_bl_and_cp_ast_tail(req, arg, lock, instant_cancel);
957 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
959 struct ldlm_resource *res = lock->l_resource;
960 struct ldlm_request *body;
961 struct ptlrpc_request *req;
965 LASSERT(lock != NULL);
967 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
968 &RQF_LDLM_GL_CALLBACK,
969 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
974 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
975 body->lock_handle[0] = lock->l_remote_handle;
976 ldlm_lock2desc(lock, &body->lock_desc);
978 /* server namespace, doesn't need lock */
979 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
980 lock->l_resource->lr_lvb_len);
981 res = lock->l_resource;
982 ptlrpc_request_set_replen(req);
985 req->rq_send_state = LUSTRE_IMP_FULL;
986 /* ptlrpc_request_alloc_pack already set timeout */
988 req->rq_timeout = ldlm_get_rq_timeout();
990 if (lock->l_export && lock->l_export->exp_nid_stats &&
991 lock->l_export->exp_nid_stats->nid_ldlm_stats)
992 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
993 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
995 rc = ptlrpc_queue_wait(req);
996 /* Update the LVB from disk if the AST failed (this is a legal race)
998 * - Glimpse callback of local lock just return -ELDLM_NO_LOCK_DATA.
999 * - Glimpse callback of remote lock might return -ELDLM_NO_LOCK_DATA
1000 * when inode is cleared. LU-274
1002 if (rc == -ELDLM_NO_LOCK_DATA) {
1003 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
1004 ldlm_res_lvbo_update(res, NULL, 1);
1005 } else if (rc != 0) {
1006 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
1008 rc = ldlm_res_lvbo_update(res, req, 1);
1011 ptlrpc_req_finished(req);
1012 if (rc == -ERESTART)
1013 ldlm_reprocess_all(res);
1018 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
1019 struct lprocfs_stats *srv_stats)
1021 int lock_type = 0, op = 0;
1023 lock_type = dlm_req->lock_desc.l_resource.lr_type;
1025 switch (lock_type) {
1027 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
1030 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
1031 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
1033 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
1036 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
1039 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
1047 lprocfs_counter_incr(srv_stats, op);
1053 * Main server-side entry point into LDLM. This is called by ptlrpc service
1054 * threads to carry out client lock enqueueing requests.
1056 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1057 struct ptlrpc_request *req,
1058 const struct ldlm_request *dlm_req,
1059 const struct ldlm_callback_suite *cbs)
1061 struct ldlm_reply *dlm_rep;
1063 ldlm_error_t err = ELDLM_OK;
1064 struct ldlm_lock *lock = NULL;
1065 void *cookie = NULL;
1069 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1071 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1072 flags = dlm_req->lock_flags;
1074 LASSERT(req->rq_export);
1076 if (req->rq_rqbd->rqbd_service->srv_stats)
1077 ldlm_svc_get_eopc(dlm_req,
1078 req->rq_rqbd->rqbd_service->srv_stats);
1080 if (req->rq_export && req->rq_export->exp_nid_stats &&
1081 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1082 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1083 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1085 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1086 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1087 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1088 dlm_req->lock_desc.l_resource.lr_type);
1089 GOTO(out, rc = -EFAULT);
1092 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1093 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1094 dlm_req->lock_desc.l_req_mode &
1095 (dlm_req->lock_desc.l_req_mode-1))) {
1096 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1097 dlm_req->lock_desc.l_req_mode);
1098 GOTO(out, rc = -EFAULT);
1101 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1102 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1104 DEBUG_REQ(D_ERROR, req,
1105 "PLAIN lock request from IBITS client?");
1106 GOTO(out, rc = -EPROTO);
1108 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1110 DEBUG_REQ(D_ERROR, req,
1111 "IBITS lock request from unaware client?");
1112 GOTO(out, rc = -EPROTO);
1116 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1117 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1118 ibits for mgc/mgs) */
1120 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1121 * inodebits lock if client does not support them. */
1122 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1123 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1124 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1125 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1126 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1127 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1128 dlm_req->lock_desc.l_req_mode = LCK_CR;
1132 if (unlikely(flags & LDLM_FL_REPLAY)) {
1133 /* Find an existing lock in the per-export lock hash */
1134 lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
1135 (void *)&dlm_req->lock_handle[0]);
1137 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1138 LPX64, lock->l_handle.h_cookie);
1139 GOTO(existing_lock, rc = 0);
1143 /* The lock's callback data might be set in the policy function */
1144 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1145 dlm_req->lock_desc.l_resource.lr_type,
1146 dlm_req->lock_desc.l_req_mode,
1150 GOTO(out, rc = -ENOMEM);
1152 lock->l_last_activity = cfs_time_current_sec();
1153 lock->l_remote_handle = dlm_req->lock_handle[0];
1154 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1156 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1157 /* Don't enqueue a lock onto the export if it is been disonnected
1158 * due to eviction (bug 3822) or server umount (bug 24324).
1159 * Cancel it now instead. */
1160 if (req->rq_export->exp_disconnected) {
1161 LDLM_ERROR(lock, "lock on disconnected export %p",
1163 GOTO(out, rc = -ENOTCONN);
1166 lock->l_export = class_export_lock_get(req->rq_export, lock);
1167 if (lock->l_export->exp_lock_hash)
1168 cfs_hash_add(lock->l_export->exp_lock_hash,
1169 &lock->l_remote_handle,
1174 if (flags & LDLM_FL_HAS_INTENT) {
1175 /* In this case, the reply buffer is allocated deep in
1176 * local_lock_enqueue by the policy function. */
1179 /* based on the assumption that lvb size never changes during
1180 * resource life time otherwise it need resource->lr_lock's
1182 if (lock->l_resource->lr_lvb_len) {
1183 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1185 lock->l_resource->lr_lvb_len);
1188 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1189 GOTO(out, rc = -ENOMEM);
1191 rc = req_capsule_server_pack(&req->rq_pill);
1196 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1197 ldlm_convert_policy_to_local(req->rq_export,
1198 dlm_req->lock_desc.l_resource.lr_type,
1199 &dlm_req->lock_desc.l_policy_data,
1200 &lock->l_policy_data);
1201 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1202 lock->l_req_extent = lock->l_policy_data.l_extent;
1204 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1208 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1209 dlm_rep->lock_flags = flags;
1211 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1212 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1214 /* We never send a blocking AST until the lock is granted, but
1215 * we can tell it right now */
1216 lock_res_and_lock(lock);
1218 /* Now take into account flags to be inherited from original lock
1219 request both in reply to client and in our own lock flags. */
1220 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1221 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1223 /* Don't move a pending lock onto the export if it has already been
1224 * disconnected due to eviction (bug 5683) or server umount (bug 24324).
1225 * Cancel it now instead. */
1226 if (unlikely(req->rq_export->exp_disconnected ||
1227 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1228 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1230 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1231 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1232 if (lock->l_granted_mode == lock->l_req_mode) {
1234 * Only cancel lock if it was granted, because it would
1235 * be destroyed immediately and would never be granted
1236 * in the future, causing timeouts on client. Not
1237 * granted lock will be cancelled immediately after
1238 * sending completion AST.
1240 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1241 unlock_res_and_lock(lock);
1242 ldlm_lock_cancel(lock);
1243 lock_res_and_lock(lock);
1245 ldlm_add_waiting_lock(lock);
1248 /* Make sure we never ever grant usual metadata locks to liblustre
1250 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1251 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1252 req->rq_export->exp_libclient) {
1253 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1254 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1255 CERROR("Granting sync lock to libclient. "
1256 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1257 dlm_req->lock_flags, dlm_rep->lock_flags,
1259 LDLM_ERROR(lock, "sync lock");
1260 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1261 struct ldlm_intent *it;
1263 it = req_capsule_client_get(&req->rq_pill,
1266 CERROR("This is intent %s ("LPU64")\n",
1267 ldlm_it2str(it->opc), it->opc);
1273 unlock_res_and_lock(lock);
1277 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1278 if (!req->rq_packed_final) {
1279 err = lustre_pack_reply(req, 1, NULL, NULL);
1284 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1285 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1287 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1288 "(err=%d, rc=%d)", err, rc);
1291 if (lock->l_resource->lr_lvb_len > 0) {
1292 /* MDT path won't handle lr_lvb_data, so
1293 * lock/unlock better be contained in the
1297 lvb = req_capsule_server_get(&req->rq_pill,
1299 LASSERTF(lvb != NULL, "req %p, lock %p\n",
1301 lock_res(lock->l_resource);
1302 memcpy(lvb, lock->l_resource->lr_lvb_data,
1303 lock->l_resource->lr_lvb_len);
1304 unlock_res(lock->l_resource);
1307 lock_res_and_lock(lock);
1308 ldlm_resource_unlink_lock(lock);
1309 ldlm_lock_destroy_nolock(lock);
1310 unlock_res_and_lock(lock);
1313 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1314 ldlm_reprocess_all(lock->l_resource);
1316 LDLM_LOCK_RELEASE(lock);
1319 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1325 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1326 ldlm_completion_callback completion_callback,
1327 ldlm_blocking_callback blocking_callback,
1328 ldlm_glimpse_callback glimpse_callback)
1330 struct ldlm_request *dlm_req;
1331 struct ldlm_callback_suite cbs = {
1332 .lcs_completion = completion_callback,
1333 .lcs_blocking = blocking_callback,
1334 .lcs_glimpse = glimpse_callback
1338 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1339 if (dlm_req != NULL) {
1340 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1341 req, dlm_req, &cbs);
1348 int ldlm_handle_convert0(struct ptlrpc_request *req,
1349 const struct ldlm_request *dlm_req)
1351 struct ldlm_reply *dlm_rep;
1352 struct ldlm_lock *lock;
1356 if (req->rq_export && req->rq_export->exp_nid_stats &&
1357 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1358 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1359 LDLM_CONVERT - LDLM_FIRST_OPC);
1361 rc = req_capsule_server_pack(&req->rq_pill);
1365 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1366 dlm_rep->lock_flags = dlm_req->lock_flags;
1368 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1370 req->rq_status = EINVAL;
1374 LDLM_DEBUG(lock, "server-side convert handler START");
1376 lock->l_last_activity = cfs_time_current_sec();
1377 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1378 &dlm_rep->lock_flags);
1380 if (ldlm_del_waiting_lock(lock))
1381 LDLM_DEBUG(lock, "converted waiting lock");
1384 req->rq_status = EDEADLOCK;
1389 if (!req->rq_status)
1390 ldlm_reprocess_all(lock->l_resource);
1391 LDLM_DEBUG(lock, "server-side convert handler END");
1392 LDLM_LOCK_PUT(lock);
1394 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1399 int ldlm_handle_convert(struct ptlrpc_request *req)
1402 struct ldlm_request *dlm_req;
1404 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1405 if (dlm_req != NULL) {
1406 rc = ldlm_handle_convert0(req, dlm_req);
1408 CERROR ("Can't unpack dlm_req\n");
1414 /* Cancel all the locks whos handles are packed into ldlm_request */
1415 int ldlm_request_cancel(struct ptlrpc_request *req,
1416 const struct ldlm_request *dlm_req, int first)
1418 struct ldlm_resource *res, *pres = NULL;
1419 struct ldlm_lock *lock;
1420 int i, count, done = 0;
1423 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1427 /* There is no lock on the server at the replay time,
1428 * skip lock cancelling to make replay tests to pass. */
1429 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1432 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1433 "starting at %d", count, first);
1435 for (i = first; i < count; i++) {
1436 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1438 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1439 "lock (cookie "LPU64")",
1440 dlm_req->lock_handle[i].cookie);
1444 res = lock->l_resource;
1449 ldlm_reprocess_all(pres);
1450 LDLM_RESOURCE_DELREF(pres);
1451 ldlm_resource_putref(pres);
1454 ldlm_resource_getref(res);
1455 LDLM_RESOURCE_ADDREF(res);
1456 ldlm_res_lvbo_update(res, NULL, 1);
1460 ldlm_lock_cancel(lock);
1461 LDLM_LOCK_PUT(lock);
1464 ldlm_reprocess_all(pres);
1465 LDLM_RESOURCE_DELREF(pres);
1466 ldlm_resource_putref(pres);
1468 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1472 int ldlm_handle_cancel(struct ptlrpc_request *req)
1474 struct ldlm_request *dlm_req;
1478 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1479 if (dlm_req == NULL) {
1480 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1484 if (req->rq_export && req->rq_export->exp_nid_stats &&
1485 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1486 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1487 LDLM_CANCEL - LDLM_FIRST_OPC);
1489 rc = req_capsule_server_pack(&req->rq_pill);
1493 if (!ldlm_request_cancel(req, dlm_req, 0))
1494 req->rq_status = ESTALE;
1496 RETURN(ptlrpc_reply(req));
1498 #endif /* HAVE_SERVER_SUPPORT */
1500 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1501 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1506 LDLM_DEBUG(lock, "client blocking AST callback handler");
1508 lock_res_and_lock(lock);
1509 lock->l_flags |= LDLM_FL_CBPENDING;
1511 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1512 lock->l_flags |= LDLM_FL_CANCEL;
1514 do_ast = (!lock->l_readers && !lock->l_writers);
1515 unlock_res_and_lock(lock);
1518 CDEBUG(D_DLMTRACE, "Lock %p already unused, calling callback (%p)\n",
1519 lock, lock->l_blocking_ast);
1520 if (lock->l_blocking_ast != NULL)
1521 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1524 CDEBUG(D_DLMTRACE, "Lock %p is referenced, will be cancelled later\n",
1528 LDLM_DEBUG(lock, "client blocking callback handler END");
1529 LDLM_LOCK_RELEASE(lock);
1533 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1534 struct ldlm_namespace *ns,
1535 struct ldlm_request *dlm_req,
1536 struct ldlm_lock *lock)
1538 CFS_LIST_HEAD(ast_list);
1541 LDLM_DEBUG(lock, "client completion callback handler START");
1543 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1544 int to = cfs_time_seconds(1);
1546 cfs_schedule_timeout_and_set_state(
1547 CFS_TASK_INTERRUPTIBLE, to);
1548 if (lock->l_granted_mode == lock->l_req_mode ||
1554 lock_res_and_lock(lock);
1555 if (lock->l_destroyed ||
1556 lock->l_granted_mode == lock->l_req_mode) {
1557 /* bug 11300: the lock has already been granted */
1558 unlock_res_and_lock(lock);
1559 LDLM_DEBUG(lock, "Double grant race happened");
1560 LDLM_LOCK_RELEASE(lock);
1565 /* If we receive the completion AST before the actual enqueue returned,
1566 * then we might need to switch lock modes, resources, or extents. */
1567 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1568 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1569 LDLM_DEBUG(lock, "completion AST, new lock mode");
1572 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1573 ldlm_convert_policy_to_local(req->rq_export,
1574 dlm_req->lock_desc.l_resource.lr_type,
1575 &dlm_req->lock_desc.l_policy_data,
1576 &lock->l_policy_data);
1577 LDLM_DEBUG(lock, "completion AST, new policy data");
1580 ldlm_resource_unlink_lock(lock);
1581 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1582 &lock->l_resource->lr_name,
1583 sizeof(lock->l_resource->lr_name)) != 0) {
1584 unlock_res_and_lock(lock);
1585 if (ldlm_lock_change_resource(ns, lock,
1586 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1587 LDLM_ERROR(lock, "Failed to allocate resource");
1588 LDLM_LOCK_RELEASE(lock);
1592 LDLM_DEBUG(lock, "completion AST, new resource");
1593 CERROR("change resource!\n");
1594 lock_res_and_lock(lock);
1597 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1598 /* BL_AST locks are not needed in lru.
1599 * let ldlm_cancel_lru() be fast. */
1600 ldlm_lock_remove_from_lru(lock);
1601 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1602 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1605 if (lock->l_lvb_len) {
1606 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1607 RCL_CLIENT) < lock->l_lvb_len) {
1608 LDLM_ERROR(lock, "completion AST did not contain "
1611 void *lvb = req_capsule_client_get(&req->rq_pill,
1613 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1617 ldlm_grant_lock(lock, &ast_list);
1618 unlock_res_and_lock(lock);
1620 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1622 /* Let Enqueue to call osc_lock_upcall() and initialize
1624 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2);
1626 ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST);
1628 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1630 LDLM_LOCK_RELEASE(lock);
1634 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1635 struct ldlm_namespace *ns,
1636 struct ldlm_request *dlm_req,
1637 struct ldlm_lock *lock)
1642 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1644 if (lock->l_glimpse_ast != NULL)
1645 rc = lock->l_glimpse_ast(lock, req);
1647 if (req->rq_repmsg != NULL) {
1650 req->rq_status = rc;
1654 lock_res_and_lock(lock);
1655 if (lock->l_granted_mode == LCK_PW &&
1656 !lock->l_readers && !lock->l_writers &&
1657 cfs_time_after(cfs_time_current(),
1658 cfs_time_add(lock->l_last_used,
1659 cfs_time_seconds(10)))) {
1660 unlock_res_and_lock(lock);
1661 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1662 ldlm_handle_bl_callback(ns, NULL, lock);
1667 unlock_res_and_lock(lock);
1668 LDLM_LOCK_RELEASE(lock);
1672 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1674 if (req->rq_no_reply)
1677 req->rq_status = rc;
1678 if (!req->rq_packed_final) {
1679 rc = lustre_pack_reply(req, 1, NULL, NULL);
1683 return ptlrpc_reply(req);
1687 static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
1689 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1692 cfs_spin_lock(&blp->blp_lock);
1693 if (blwi->blwi_lock && blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
1694 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1695 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1697 /* other blocking callbacks are added to the regular list */
1698 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1700 cfs_spin_unlock(&blp->blp_lock);
1702 cfs_waitq_signal(&blp->blp_waitq);
1704 /* can not use blwi->blwi_mode as blwi could be already freed in
1706 if (mode == LDLM_SYNC)
1707 cfs_wait_for_completion(&blwi->blwi_comp);
1712 static inline void init_blwi(struct ldlm_bl_work_item *blwi,
1713 struct ldlm_namespace *ns,
1714 struct ldlm_lock_desc *ld,
1715 cfs_list_t *cancels, int count,
1716 struct ldlm_lock *lock,
1719 cfs_init_completion(&blwi->blwi_comp);
1720 CFS_INIT_LIST_HEAD(&blwi->blwi_head);
1722 if (cfs_memory_pressure_get())
1723 blwi->blwi_mem_pressure = 1;
1726 blwi->blwi_mode = mode;
1728 blwi->blwi_ld = *ld;
1730 cfs_list_add(&blwi->blwi_head, cancels);
1731 cfs_list_del_init(cancels);
1732 blwi->blwi_count = count;
1734 blwi->blwi_lock = lock;
1738 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1739 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1740 cfs_list_t *cancels, int count, int mode)
1744 if (cancels && count == 0)
1747 if (mode == LDLM_SYNC) {
1748 /* if it is synchronous call do minimum mem alloc, as it could
1749 * be triggered from kernel shrinker
1751 struct ldlm_bl_work_item blwi;
1752 memset(&blwi, 0, sizeof(blwi));
1753 init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
1754 RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
1756 struct ldlm_bl_work_item *blwi;
1757 OBD_ALLOC(blwi, sizeof(*blwi));
1760 init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
1762 RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
1768 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1769 struct ldlm_lock *lock)
1772 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
1778 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1779 cfs_list_t *cancels, int count, int mode)
1782 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
1788 /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
1789 static int ldlm_handle_setinfo(struct ptlrpc_request *req)
1791 struct obd_device *obd = req->rq_export->exp_obd;
1798 DEBUG_REQ(D_HSM, req, "%s: handle setinfo\n", obd->obd_name);
1800 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
1802 key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1804 DEBUG_REQ(D_IOCTL, req, "no set_info key");
1807 keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1809 val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1811 DEBUG_REQ(D_IOCTL, req, "no set_info val");
1814 vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1817 /* We are responsible for swabbing contents of val */
1819 if (KEY_IS(KEY_HSM_COPYTOOL_SEND))
1820 /* Pass it on to mdc (the "export" in this case) */
1821 rc = obd_set_info_async(req->rq_export,
1822 sizeof(KEY_HSM_COPYTOOL_SEND),
1823 KEY_HSM_COPYTOOL_SEND,
1826 DEBUG_REQ(D_WARNING, req, "ignoring unknown key %s", key);
1831 static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
1832 const char *msg, int rc,
1833 struct lustre_handle *handle)
1835 DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
1836 "%s: [nid %s] [rc %d] [lock "LPX64"]",
1837 msg, libcfs_id2str(req->rq_peer), rc,
1838 handle ? handle->cookie : 0);
1839 if (req->rq_no_reply)
1840 CWARN("No reply was sent, maybe cause bug 21636.\n");
1842 CWARN("Send reply failed, maybe cause bug 21636.\n");
1845 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1846 static int ldlm_callback_handler(struct ptlrpc_request *req)
1848 struct ldlm_namespace *ns;
1849 struct ldlm_request *dlm_req;
1850 struct ldlm_lock *lock;
1854 /* Requests arrive in sender's byte order. The ptlrpc service
1855 * handler has already checked and, if necessary, byte-swapped the
1856 * incoming request message body, but I am responsible for the
1857 * message buffers. */
1859 /* do nothing for sec context finalize */
1860 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1863 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1865 if (req->rq_export == NULL) {
1866 rc = ldlm_callback_reply(req, -ENOTCONN);
1867 ldlm_callback_errmsg(req, "Operate on unconnected server",
1872 LASSERT(req->rq_export != NULL);
1873 LASSERT(req->rq_export->exp_obd != NULL);
1875 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1876 case LDLM_BL_CALLBACK:
1877 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1880 case LDLM_CP_CALLBACK:
1881 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1884 case LDLM_GL_CALLBACK:
1885 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1889 rc = ldlm_handle_setinfo(req);
1890 ldlm_callback_reply(req, rc);
1892 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1893 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
1894 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1895 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1897 rc = llog_origin_handle_cancel(req);
1898 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1900 ldlm_callback_reply(req, rc);
1902 case OBD_QC_CALLBACK:
1903 req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
1904 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
1906 rc = target_handle_qc_callback(req);
1907 ldlm_callback_reply(req, rc);
1911 /* reply in handler */
1912 req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
1913 rc = target_handle_dqacq_callback(req);
1915 case LLOG_ORIGIN_HANDLE_CREATE:
1916 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1917 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1919 rc = llog_origin_handle_create(req);
1920 ldlm_callback_reply(req, rc);
1922 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1923 req_capsule_set(&req->rq_pill,
1924 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1925 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1927 rc = llog_origin_handle_next_block(req);
1928 ldlm_callback_reply(req, rc);
1930 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1931 req_capsule_set(&req->rq_pill,
1932 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1933 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1935 rc = llog_origin_handle_read_header(req);
1936 ldlm_callback_reply(req, rc);
1938 case LLOG_ORIGIN_HANDLE_CLOSE:
1939 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1941 rc = llog_origin_handle_close(req);
1942 ldlm_callback_reply(req, rc);
1945 CERROR("unknown opcode %u\n",
1946 lustre_msg_get_opc(req->rq_reqmsg));
1947 ldlm_callback_reply(req, -EPROTO);
1951 ns = req->rq_export->exp_obd->obd_namespace;
1952 LASSERT(ns != NULL);
1954 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1956 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1957 if (dlm_req == NULL) {
1958 rc = ldlm_callback_reply(req, -EPROTO);
1959 ldlm_callback_errmsg(req, "Operate without parameter", rc,
1964 /* Force a known safe race, send a cancel to the server for a lock
1965 * which the server has already started a blocking callback on. */
1966 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
1967 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1968 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
1970 CERROR("ldlm_cli_cancel: %d\n", rc);
1973 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
1975 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
1976 "disappeared\n", dlm_req->lock_handle[0].cookie);
1977 rc = ldlm_callback_reply(req, -EINVAL);
1978 ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
1979 &dlm_req->lock_handle[0]);
1983 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
1984 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
1985 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
1987 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1988 lock_res_and_lock(lock);
1989 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1990 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1991 /* If somebody cancels lock and cache is already dropped,
1992 * or lock is failed before cp_ast received on client,
1993 * we can tell the server we have no lock. Otherwise, we
1994 * should send cancel after dropping the cache. */
1995 if (((lock->l_flags & LDLM_FL_CANCELING) &&
1996 (lock->l_flags & LDLM_FL_BL_DONE)) ||
1997 (lock->l_flags & LDLM_FL_FAILED)) {
1998 LDLM_DEBUG(lock, "callback on lock "
1999 LPX64" - lock disappeared\n",
2000 dlm_req->lock_handle[0].cookie);
2001 unlock_res_and_lock(lock);
2002 LDLM_LOCK_RELEASE(lock);
2003 rc = ldlm_callback_reply(req, -EINVAL);
2004 ldlm_callback_errmsg(req, "Operate on stale lock", rc,
2005 &dlm_req->lock_handle[0]);
2008 /* BL_AST locks are not needed in lru.
2009 * let ldlm_cancel_lru() be fast. */
2010 ldlm_lock_remove_from_lru(lock);
2011 lock->l_flags |= LDLM_FL_BL_AST;
2013 unlock_res_and_lock(lock);
2015 /* We want the ost thread to get this reply so that it can respond
2016 * to ost requests (write cache writeback) that might be triggered
2019 * But we'd also like to be able to indicate in the reply that we're
2020 * cancelling right now, because it's unused, or have an intent result
2021 * in the reply, so we might have to push the responsibility for sending
2022 * the reply down into the AST handlers, alas. */
2024 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2025 case LDLM_BL_CALLBACK:
2026 CDEBUG(D_INODE, "blocking ast\n");
2027 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
2028 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
2029 rc = ldlm_callback_reply(req, 0);
2030 if (req->rq_no_reply || rc)
2031 ldlm_callback_errmsg(req, "Normal process", rc,
2032 &dlm_req->lock_handle[0]);
2034 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
2035 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
2037 case LDLM_CP_CALLBACK:
2038 CDEBUG(D_INODE, "completion ast\n");
2039 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
2040 ldlm_callback_reply(req, 0);
2041 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
2043 case LDLM_GL_CALLBACK:
2044 CDEBUG(D_INODE, "glimpse ast\n");
2045 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
2046 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
2049 LBUG(); /* checked above */
2055 #ifdef HAVE_SERVER_SUPPORT
2056 static int ldlm_cancel_handler(struct ptlrpc_request *req)
2061 /* Requests arrive in sender's byte order. The ptlrpc service
2062 * handler has already checked and, if necessary, byte-swapped the
2063 * incoming request message body, but I am responsible for the
2064 * message buffers. */
2066 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2068 if (req->rq_export == NULL) {
2069 struct ldlm_request *dlm_req;
2071 CERROR("%s from %s arrived at %lu with bad export cookie "
2073 ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
2074 libcfs_nid2str(req->rq_peer.nid),
2075 req->rq_arrival_time.tv_sec,
2076 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
2078 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_CANCEL) {
2079 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2080 dlm_req = req_capsule_client_get(&req->rq_pill,
2082 if (dlm_req != NULL)
2083 ldlm_lock_dump_handle(D_ERROR,
2084 &dlm_req->lock_handle[0]);
2086 ldlm_callback_reply(req, -ENOTCONN);
2090 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2092 /* XXX FIXME move this back to mds/handler.c, bug 249 */
2094 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2095 CDEBUG(D_INODE, "cancel\n");
2096 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
2098 rc = ldlm_handle_cancel(req);
2102 case OBD_LOG_CANCEL:
2103 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2104 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2106 rc = llog_origin_handle_cancel(req);
2107 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2109 ldlm_callback_reply(req, rc);
2112 CERROR("invalid opcode %d\n",
2113 lustre_msg_get_opc(req->rq_reqmsg));
2114 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2115 ldlm_callback_reply(req, -EINVAL);
2121 static int ldlm_cancel_hpreq_lock_match(struct ptlrpc_request *req,
2122 struct ldlm_lock *lock)
2124 struct ldlm_request *dlm_req;
2125 struct lustre_handle lockh;
2130 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2131 if (dlm_req == NULL)
2134 ldlm_lock2handle(lock, &lockh);
2135 for (i = 0; i < dlm_req->lock_count; i++) {
2136 if (lustre_handle_equal(&dlm_req->lock_handle[i],
2138 DEBUG_REQ(D_RPCTRACE, req,
2139 "Prio raised by lock "LPX64".", lockh.cookie);
2150 static int ldlm_cancel_hpreq_check(struct ptlrpc_request *req)
2152 struct ldlm_request *dlm_req;
2157 /* no prolong in recovery */
2158 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
2161 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2162 if (dlm_req == NULL)
2165 for (i = 0; i < dlm_req->lock_count; i++) {
2166 struct ldlm_lock *lock;
2168 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
2172 rc = !!(lock->l_flags & LDLM_FL_AST_SENT);
2174 LDLM_DEBUG(lock, "hpreq cancel lock");
2175 LDLM_LOCK_PUT(lock);
2184 static struct ptlrpc_hpreq_ops ldlm_cancel_hpreq_ops = {
2185 .hpreq_lock_match = ldlm_cancel_hpreq_lock_match,
2186 .hpreq_check = ldlm_cancel_hpreq_check
2189 static int ldlm_hpreq_handler(struct ptlrpc_request *req)
2193 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2195 if (req->rq_export == NULL)
2198 if (LDLM_CANCEL == lustre_msg_get_opc(req->rq_reqmsg)) {
2199 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2200 req->rq_ops = &ldlm_cancel_hpreq_ops;
2205 int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2206 cfs_hlist_node_t *hnode, void *data)
2209 cfs_list_t *rpc_list = data;
2210 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2212 lock_res_and_lock(lock);
2214 if (lock->l_req_mode != lock->l_granted_mode) {
2215 unlock_res_and_lock(lock);
2219 LASSERT(lock->l_resource);
2220 if (lock->l_resource->lr_type != LDLM_IBITS &&
2221 lock->l_resource->lr_type != LDLM_PLAIN) {
2222 unlock_res_and_lock(lock);
2226 if (lock->l_flags & LDLM_FL_AST_SENT) {
2227 unlock_res_and_lock(lock);
2231 LASSERT(lock->l_blocking_ast);
2232 LASSERT(!lock->l_blocking_lock);
2234 lock->l_flags |= LDLM_FL_AST_SENT;
2235 if (lock->l_export && lock->l_export->exp_lock_hash &&
2236 !cfs_hlist_unhashed(&lock->l_exp_hash))
2237 cfs_hash_del(lock->l_export->exp_lock_hash,
2238 &lock->l_remote_handle, &lock->l_exp_hash);
2239 cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
2240 LDLM_LOCK_GET(lock);
2242 unlock_res_and_lock(lock);
2246 void ldlm_revoke_export_locks(struct obd_export *exp)
2248 cfs_list_t rpc_list;
2251 CFS_INIT_LIST_HEAD(&rpc_list);
2252 cfs_hash_for_each_empty(exp->exp_lock_hash,
2253 ldlm_revoke_lock_cb, &rpc_list);
2254 ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
2255 LDLM_WORK_REVOKE_AST);
2259 #endif /* HAVE_SERVER_SUPPORT */
2262 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
2264 struct ldlm_bl_work_item *blwi = NULL;
2265 static unsigned int num_bl = 0;
2267 cfs_spin_lock(&blp->blp_lock);
2268 /* process a request from the blp_list at least every blp_num_threads */
2269 if (!cfs_list_empty(&blp->blp_list) &&
2270 (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
2271 blwi = cfs_list_entry(blp->blp_list.next,
2272 struct ldlm_bl_work_item, blwi_entry);
2274 if (!cfs_list_empty(&blp->blp_prio_list))
2275 blwi = cfs_list_entry(blp->blp_prio_list.next,
2276 struct ldlm_bl_work_item,
2280 if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
2282 cfs_list_del(&blwi->blwi_entry);
2284 cfs_spin_unlock(&blp->blp_lock);
2289 /* This only contains temporary data until the thread starts */
2290 struct ldlm_bl_thread_data {
2291 char bltd_name[CFS_CURPROC_COMM_MAX];
2292 struct ldlm_bl_pool *bltd_blp;
2293 cfs_completion_t bltd_comp;
2297 static int ldlm_bl_thread_main(void *arg);
2299 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2301 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2304 cfs_init_completion(&bltd.bltd_comp);
2305 rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
2307 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2308 cfs_atomic_read(&blp->blp_num_threads), rc);
2311 cfs_wait_for_completion(&bltd.bltd_comp);
2316 static int ldlm_bl_thread_main(void *arg)
2318 struct ldlm_bl_pool *blp;
2322 struct ldlm_bl_thread_data *bltd = arg;
2324 blp = bltd->bltd_blp;
2327 cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
2328 cfs_atomic_inc(&blp->blp_busy_threads);
2330 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2331 "ldlm_bl_%02d", bltd->bltd_num);
2332 cfs_daemonize(bltd->bltd_name);
2334 cfs_complete(&bltd->bltd_comp);
2335 /* cannot use bltd after this, it is only on caller's stack */
2339 struct l_wait_info lwi = { 0 };
2340 struct ldlm_bl_work_item *blwi = NULL;
2343 blwi = ldlm_bl_get_work(blp);
2346 cfs_atomic_dec(&blp->blp_busy_threads);
2347 l_wait_event_exclusive(blp->blp_waitq,
2348 (blwi = ldlm_bl_get_work(blp)) != NULL,
2350 busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
2352 busy = cfs_atomic_read(&blp->blp_busy_threads);
2355 if (blwi->blwi_ns == NULL)
2356 /* added by ldlm_cleanup() */
2359 /* Not fatal if racy and have a few too many threads */
2360 if (unlikely(busy < blp->blp_max_threads &&
2361 busy >= cfs_atomic_read(&blp->blp_num_threads) &&
2362 !blwi->blwi_mem_pressure))
2363 /* discard the return value, we tried */
2364 ldlm_bl_thread_start(blp);
2366 if (blwi->blwi_mem_pressure)
2367 cfs_memory_pressure_set();
2369 if (blwi->blwi_count) {
2371 /* The special case when we cancel locks in lru
2372 * asynchronously, we pass the list of locks here.
2373 * Thus locks are marked LDLM_FL_CANCELING, but NOT
2374 * canceled locally yet. */
2375 count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
2378 ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
2380 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2383 if (blwi->blwi_mem_pressure)
2384 cfs_memory_pressure_clr();
2386 if (blwi->blwi_mode == LDLM_ASYNC)
2387 OBD_FREE(blwi, sizeof(*blwi));
2389 cfs_complete(&blwi->blwi_comp);
2392 cfs_atomic_dec(&blp->blp_busy_threads);
2393 cfs_atomic_dec(&blp->blp_num_threads);
2394 cfs_complete(&blp->blp_comp);
2400 static int ldlm_setup(void);
2401 static int ldlm_cleanup(void);
2403 int ldlm_get_ref(void)
2407 cfs_mutex_lock(&ldlm_ref_mutex);
2408 if (++ldlm_refcount == 1) {
2413 cfs_mutex_unlock(&ldlm_ref_mutex);
2418 void ldlm_put_ref(void)
2421 cfs_mutex_lock(&ldlm_ref_mutex);
2422 if (ldlm_refcount == 1) {
2423 int rc = ldlm_cleanup();
2425 CERROR("ldlm_cleanup failed: %d\n", rc);
2431 cfs_mutex_unlock(&ldlm_ref_mutex);
2437 * Export handle<->lock hash operations.
2440 ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2442 return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2446 ldlm_export_lock_key(cfs_hlist_node_t *hnode)
2448 struct ldlm_lock *lock;
2450 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2451 return &lock->l_remote_handle;
2455 ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
2457 struct ldlm_lock *lock;
2459 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2460 lock->l_remote_handle = *(struct lustre_handle *)key;
2464 ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
2466 return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
2470 ldlm_export_lock_object(cfs_hlist_node_t *hnode)
2472 return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2476 ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2478 struct ldlm_lock *lock;
2480 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2481 LDLM_LOCK_GET(lock);
2485 ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2487 struct ldlm_lock *lock;
2489 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2490 LDLM_LOCK_RELEASE(lock);
2493 static cfs_hash_ops_t ldlm_export_lock_ops = {
2494 .hs_hash = ldlm_export_lock_hash,
2495 .hs_key = ldlm_export_lock_key,
2496 .hs_keycmp = ldlm_export_lock_keycmp,
2497 .hs_keycpy = ldlm_export_lock_keycpy,
2498 .hs_object = ldlm_export_lock_object,
2499 .hs_get = ldlm_export_lock_get,
2500 .hs_put = ldlm_export_lock_put,
2501 .hs_put_locked = ldlm_export_lock_put,
2504 int ldlm_init_export(struct obd_export *exp)
2508 exp->exp_lock_hash =
2509 cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
2510 HASH_EXP_LOCK_CUR_BITS,
2511 HASH_EXP_LOCK_MAX_BITS,
2512 HASH_EXP_LOCK_BKT_BITS, 0,
2513 CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
2514 &ldlm_export_lock_ops,
2515 CFS_HASH_DEFAULT | CFS_HASH_REHASH_KEY |
2516 CFS_HASH_NBLK_CHANGE);
2518 if (!exp->exp_lock_hash)
2523 EXPORT_SYMBOL(ldlm_init_export);
2525 void ldlm_destroy_export(struct obd_export *exp)
2528 cfs_hash_putref(exp->exp_lock_hash);
2529 exp->exp_lock_hash = NULL;
2532 EXPORT_SYMBOL(ldlm_destroy_export);
2534 static int ldlm_setup(void)
2536 struct ldlm_bl_pool *blp;
2538 int ldlm_min_threads = LDLM_THREADS_AUTO_MIN;
2539 int ldlm_max_threads = LDLM_THREADS_AUTO_MAX;
2545 if (ldlm_state != NULL)
2548 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2549 if (ldlm_state == NULL)
2553 rc = ldlm_proc_setup();
2559 if (ldlm_num_threads) {
2560 /* If ldlm_num_threads is set, it is the min and the max. */
2561 if (ldlm_num_threads > LDLM_THREADS_AUTO_MAX)
2562 ldlm_num_threads = LDLM_THREADS_AUTO_MAX;
2563 if (ldlm_num_threads < LDLM_THREADS_AUTO_MIN)
2564 ldlm_num_threads = LDLM_THREADS_AUTO_MIN;
2565 ldlm_min_threads = ldlm_max_threads = ldlm_num_threads;
2569 ldlm_state->ldlm_cb_service =
2570 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2571 LDLM_MAXREPSIZE, LDLM_CB_REQUEST_PORTAL,
2572 LDLM_CB_REPLY_PORTAL, 2,
2573 ldlm_callback_handler, "ldlm_cbd",
2574 ldlm_svc_proc_dir, NULL,
2575 ldlm_min_threads, ldlm_max_threads,
2577 LCT_MD_THREAD|LCT_DT_THREAD, NULL);
2579 if (!ldlm_state->ldlm_cb_service) {
2580 CERROR("failed to start service\n");
2581 GOTO(out_proc, rc = -ENOMEM);
2584 #ifdef HAVE_SERVER_SUPPORT
2585 ldlm_state->ldlm_cancel_service =
2586 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2587 LDLM_MAXREPSIZE, LDLM_CANCEL_REQUEST_PORTAL,
2588 LDLM_CANCEL_REPLY_PORTAL, 6,
2589 ldlm_cancel_handler, "ldlm_canceld",
2590 ldlm_svc_proc_dir, NULL,
2591 ldlm_min_threads, ldlm_max_threads,
2593 LCT_MD_THREAD|LCT_DT_THREAD|LCT_CL_THREAD,
2594 ldlm_hpreq_handler);
2596 if (!ldlm_state->ldlm_cancel_service) {
2597 CERROR("failed to start service\n");
2598 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 # ifdef HAVE_SERVER_SUPPORT
2624 rc = ptlrpc_start_threads(ldlm_state->ldlm_cancel_service);
2626 GOTO(out_thread, rc);
2629 rc = ptlrpc_start_threads(ldlm_state->ldlm_cb_service);
2631 GOTO(out_thread, rc);
2633 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2634 expired_lock_thread.elt_state = ELT_STOPPED;
2635 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2637 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2638 cfs_spin_lock_init(&waiting_locks_spinlock);
2639 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2641 rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
2643 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2644 GOTO(out_thread, rc);
2647 cfs_wait_event(expired_lock_thread.elt_waitq,
2648 expired_lock_thread.elt_state == ELT_READY);
2652 rc = ldlm_pools_init();
2654 GOTO(out_thread, rc);
2660 # ifdef HAVE_SERVER_SUPPORT
2661 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2663 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2668 ldlm_proc_cleanup();
2671 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2676 static int ldlm_cleanup(void)
2679 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2683 if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2684 !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2685 CERROR("ldlm still has namespaces; clean these up first.\n");
2686 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2687 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2696 while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
2697 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2699 cfs_init_completion(&blp->blp_comp);
2701 cfs_spin_lock(&blp->blp_lock);
2702 cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2703 cfs_waitq_signal(&blp->blp_waitq);
2704 cfs_spin_unlock(&blp->blp_lock);
2706 cfs_wait_for_completion(&blp->blp_comp);
2708 OBD_FREE(blp, sizeof(*blp));
2710 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2711 # ifdef HAVE_SERVER_SUPPORT
2712 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2714 ldlm_proc_cleanup();
2716 expired_lock_thread.elt_state = ELT_TERMINATE;
2717 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2718 cfs_wait_event(expired_lock_thread.elt_waitq,
2719 expired_lock_thread.elt_state == ELT_STOPPED);
2720 #else /* !__KERNEL__ */
2721 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2722 # ifdef HAVE_SERVER_SUPPORT
2723 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2725 #endif /* __KERNEL__ */
2727 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2735 cfs_mutex_init(&ldlm_ref_mutex);
2736 cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2737 cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2738 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2739 sizeof(struct ldlm_resource), 0,
2740 CFS_SLAB_HWCACHE_ALIGN);
2741 if (ldlm_resource_slab == NULL)
2744 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2745 sizeof(struct ldlm_lock), 0,
2746 CFS_SLAB_HWCACHE_ALIGN | CFS_SLAB_DESTROY_BY_RCU);
2747 if (ldlm_lock_slab == NULL) {
2748 cfs_mem_cache_destroy(ldlm_resource_slab);
2752 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2753 sizeof(struct ldlm_interval),
2754 0, CFS_SLAB_HWCACHE_ALIGN);
2755 if (ldlm_interval_slab == NULL) {
2756 cfs_mem_cache_destroy(ldlm_resource_slab);
2757 cfs_mem_cache_destroy(ldlm_lock_slab);
2760 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2761 class_export_dump_hook = ldlm_dump_export_locks;
2766 void ldlm_exit(void)
2770 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2771 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2772 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2774 /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
2775 * synchronize_rcu() to wait a grace period elapsed, so that
2776 * ldlm_lock_free() get a chance to be called. */
2779 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2780 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2781 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2782 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2786 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2789 #ifdef HAVE_SERVER_SUPPORT
2790 EXPORT_SYMBOL(ldlm_get_processing_policy);
2792 EXPORT_SYMBOL(ldlm_lock2desc);
2793 EXPORT_SYMBOL(ldlm_register_intent);
2794 EXPORT_SYMBOL(ldlm_lockname);
2795 EXPORT_SYMBOL(ldlm_typename);
2796 EXPORT_SYMBOL(ldlm_lock2handle);
2797 EXPORT_SYMBOL(__ldlm_handle2lock);
2798 EXPORT_SYMBOL(ldlm_lock_get);
2799 EXPORT_SYMBOL(ldlm_lock_put);
2800 EXPORT_SYMBOL(ldlm_lock_match);
2801 EXPORT_SYMBOL(ldlm_lock_cancel);
2802 EXPORT_SYMBOL(ldlm_lock_addref);
2803 EXPORT_SYMBOL(ldlm_lock_addref_try);
2804 EXPORT_SYMBOL(ldlm_lock_decref);
2805 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2806 EXPORT_SYMBOL(ldlm_lock_change_resource);
2807 EXPORT_SYMBOL(ldlm_it2str);
2808 EXPORT_SYMBOL(ldlm_lock_dump);
2809 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2810 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2811 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
2812 EXPORT_SYMBOL(ldlm_lock_allow_match);
2813 EXPORT_SYMBOL(ldlm_lock_downgrade);
2814 EXPORT_SYMBOL(ldlm_lock_convert);
2816 /* ldlm_request.c */
2817 EXPORT_SYMBOL(ldlm_completion_ast_async);
2818 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2819 EXPORT_SYMBOL(ldlm_completion_ast);
2820 EXPORT_SYMBOL(ldlm_blocking_ast);
2821 EXPORT_SYMBOL(ldlm_glimpse_ast);
2822 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2823 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2824 EXPORT_SYMBOL(ldlm_prep_elc_req);
2825 EXPORT_SYMBOL(ldlm_cli_convert);
2826 EXPORT_SYMBOL(ldlm_cli_enqueue);
2827 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2828 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2829 EXPORT_SYMBOL(ldlm_cli_cancel);
2830 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2831 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2832 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2833 EXPORT_SYMBOL(ldlm_replay_locks);
2834 EXPORT_SYMBOL(ldlm_resource_foreach);
2835 EXPORT_SYMBOL(ldlm_namespace_foreach);
2836 EXPORT_SYMBOL(ldlm_resource_iterate);
2837 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2838 EXPORT_SYMBOL(ldlm_cli_cancel_list_local);
2839 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2842 #ifdef HAVE_SERVER_SUPPORT
2843 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2844 EXPORT_SYMBOL(ldlm_server_completion_ast);
2845 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2846 EXPORT_SYMBOL(ldlm_handle_enqueue);
2847 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2848 EXPORT_SYMBOL(ldlm_handle_cancel);
2849 EXPORT_SYMBOL(ldlm_request_cancel);
2850 EXPORT_SYMBOL(ldlm_handle_convert);
2851 EXPORT_SYMBOL(ldlm_handle_convert0);
2852 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2854 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2855 EXPORT_SYMBOL(ldlm_get_ref);
2856 EXPORT_SYMBOL(ldlm_put_ref);
2857 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2859 /* ldlm_resource.c */
2860 EXPORT_SYMBOL(ldlm_namespace_new);
2861 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2862 EXPORT_SYMBOL(ldlm_namespace_free);
2863 EXPORT_SYMBOL(ldlm_namespace_dump);
2864 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2865 EXPORT_SYMBOL(ldlm_resource_get);
2866 EXPORT_SYMBOL(ldlm_resource_putref);
2867 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2870 EXPORT_SYMBOL(client_import_add_conn);
2871 EXPORT_SYMBOL(client_import_del_conn);
2872 EXPORT_SYMBOL(client_obd_setup);
2873 EXPORT_SYMBOL(client_obd_cleanup);
2874 EXPORT_SYMBOL(client_connect_import);
2875 EXPORT_SYMBOL(client_disconnect_export);
2876 EXPORT_SYMBOL(target_send_reply);
2877 EXPORT_SYMBOL(target_pack_pool_reply);
2879 #ifdef HAVE_SERVER_SUPPORT
2880 EXPORT_SYMBOL(server_disconnect_export);
2881 EXPORT_SYMBOL(target_stop_recovery_thread);
2882 EXPORT_SYMBOL(target_handle_connect);
2883 EXPORT_SYMBOL(target_cleanup_recovery);
2884 EXPORT_SYMBOL(target_destroy_export);
2885 EXPORT_SYMBOL(target_cancel_recovery_timer);
2886 EXPORT_SYMBOL(target_queue_recovery_request);
2887 EXPORT_SYMBOL(target_handle_ping);
2888 EXPORT_SYMBOL(target_handle_disconnect);
2892 EXPORT_SYMBOL(lock_res_and_lock);
2893 EXPORT_SYMBOL(unlock_res_and_lock);