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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ldlm/ldlm_lockd.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Phil Schwan <phil@clusterfs.com>
43 # define EXPORT_SYMTAB
45 #define DEBUG_SUBSYSTEM S_LDLM
48 # include <libcfs/libcfs.h>
50 # include <liblustre.h>
53 #include <lustre_dlm.h>
54 #include <obd_class.h>
55 #include <libcfs/list.h>
56 #include "ldlm_internal.h"
59 static int ldlm_num_threads;
60 CFS_MODULE_PARM(ldlm_num_threads, "i", int, 0444,
61 "number of DLM service threads to start");
64 extern cfs_mem_cache_t *ldlm_resource_slab;
65 extern cfs_mem_cache_t *ldlm_lock_slab;
66 static struct semaphore ldlm_ref_sem;
67 static int ldlm_refcount;
71 static struct ldlm_state *ldlm_state;
73 inline cfs_time_t round_timeout(cfs_time_t timeout)
75 return cfs_time_seconds((int)cfs_duration_sec(cfs_time_sub(timeout, 0)) + 1);
78 /* timeout for initial callback (AST) reply (bz10399) */
79 static inline unsigned int ldlm_get_rq_timeout(void)
82 unsigned int timeout = min(ldlm_timeout, obd_timeout / 3);
84 return timeout < 1 ? 1 : timeout;
88 /* w_l_spinlock protects both waiting_locks_list and expired_lock_thread */
89 static spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
90 static struct list_head waiting_locks_list;
91 static cfs_timer_t waiting_locks_timer;
93 static struct expired_lock_thread {
94 cfs_waitq_t elt_waitq;
97 struct list_head elt_expired_locks;
98 } expired_lock_thread;
101 #define ELT_STOPPED 0
103 #define ELT_TERMINATE 2
105 struct ldlm_bl_pool {
109 * blp_prio_list is used for callbacks that should be handled
110 * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
113 struct list_head blp_prio_list;
116 * blp_list is used for all other callbacks which are likely
117 * to take longer to process.
119 struct list_head blp_list;
121 cfs_waitq_t blp_waitq;
122 struct completion blp_comp;
123 atomic_t blp_num_threads;
124 atomic_t blp_busy_threads;
129 struct ldlm_bl_work_item {
130 struct list_head blwi_entry;
131 struct ldlm_namespace *blwi_ns;
132 struct ldlm_lock_desc blwi_ld;
133 struct ldlm_lock *blwi_lock;
134 struct list_head blwi_head;
140 static inline int have_expired_locks(void)
145 spin_lock_bh(&waiting_locks_spinlock);
146 need_to_run = !list_empty(&expired_lock_thread.elt_expired_locks);
147 spin_unlock_bh(&waiting_locks_spinlock);
152 static int expired_lock_main(void *arg)
154 struct list_head *expired = &expired_lock_thread.elt_expired_locks;
155 struct l_wait_info lwi = { 0 };
159 cfs_daemonize("ldlm_elt");
161 expired_lock_thread.elt_state = ELT_READY;
162 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
165 l_wait_event(expired_lock_thread.elt_waitq,
166 have_expired_locks() ||
167 expired_lock_thread.elt_state == ELT_TERMINATE,
170 spin_lock_bh(&waiting_locks_spinlock);
171 if (expired_lock_thread.elt_dump) {
172 spin_unlock_bh(&waiting_locks_spinlock);
174 /* from waiting_locks_callback, but not in timer */
175 libcfs_debug_dumplog();
176 libcfs_run_lbug_upcall(__FILE__,
177 "waiting_locks_callback",
178 expired_lock_thread.elt_dump);
180 spin_lock_bh(&waiting_locks_spinlock);
181 expired_lock_thread.elt_dump = 0;
186 while (!list_empty(expired)) {
187 struct obd_export *export;
188 struct ldlm_lock *lock;
190 lock = list_entry(expired->next, struct ldlm_lock,
192 if ((void *)lock < LP_POISON + CFS_PAGE_SIZE &&
193 (void *)lock >= LP_POISON) {
194 spin_unlock_bh(&waiting_locks_spinlock);
195 CERROR("free lock on elt list %p\n", lock);
198 list_del_init(&lock->l_pending_chain);
199 if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE &&
200 (void *)lock->l_export >= LP_POISON) {
201 CERROR("lock with free export on elt list %p\n",
203 lock->l_export = NULL;
204 LDLM_ERROR(lock, "free export");
205 /* release extra ref grabbed by
206 * ldlm_add_waiting_lock() or
207 * ldlm_failed_ast() */
211 export = class_export_get(lock->l_export);
212 spin_unlock_bh(&waiting_locks_spinlock);
214 /* release extra ref grabbed by ldlm_add_waiting_lock()
215 * or ldlm_failed_ast() */
219 class_fail_export(export);
220 class_export_put(export);
221 spin_lock_bh(&waiting_locks_spinlock);
223 spin_unlock_bh(&waiting_locks_spinlock);
225 if (do_dump && obd_dump_on_eviction) {
226 CERROR("dump the log upon eviction\n");
227 libcfs_debug_dumplog();
230 if (expired_lock_thread.elt_state == ELT_TERMINATE)
234 expired_lock_thread.elt_state = ELT_STOPPED;
235 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
239 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
242 * Check if there is a request in the export request list
243 * which prevents the lock canceling.
245 static int ldlm_lock_busy(struct ldlm_lock *lock)
247 struct ptlrpc_request *req;
251 if (lock->l_export == NULL)
254 spin_lock(&lock->l_export->exp_lock);
255 list_for_each_entry(req, &lock->l_export->exp_queued_rpc, rq_exp_list) {
256 if (req->rq_ops->hpreq_lock_match) {
257 match = req->rq_ops->hpreq_lock_match(req, lock);
262 spin_unlock(&lock->l_export->exp_lock);
266 /* This is called from within a timer interrupt and cannot schedule */
267 static void waiting_locks_callback(unsigned long unused)
269 struct ldlm_lock *lock, *last = NULL;
272 spin_lock_bh(&waiting_locks_spinlock);
273 while (!list_empty(&waiting_locks_list)) {
274 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
276 if (cfs_time_after(lock->l_callback_timeout, cfs_time_current()) ||
277 (lock->l_req_mode == LCK_GROUP))
280 if (ptlrpc_check_suspend()) {
281 /* there is a case when we talk to one mds, holding
282 * lock from another mds. this way we easily can get
283 * here, if second mds is being recovered. so, we
284 * suspend timeouts. bug 6019 */
286 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
287 lock->l_export->exp_client_uuid.uuid,
288 lock->l_export->exp_connection->c_remote_uuid.uuid,
289 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
291 list_del_init(&lock->l_pending_chain);
292 spin_unlock_bh(&waiting_locks_spinlock);
293 ldlm_add_waiting_lock(lock);
297 /* if timeout overlaps the activation time of suspended timeouts
298 * then extend it to give a chance for client to reconnect */
299 if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
300 cfs_time_seconds(obd_timeout)/2),
301 ptlrpc_suspend_wakeup_time())) {
302 LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
303 lock->l_export->exp_client_uuid.uuid,
304 lock->l_export->exp_connection->c_remote_uuid.uuid,
305 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
307 list_del_init(&lock->l_pending_chain);
308 spin_unlock_bh(&waiting_locks_spinlock);
309 ldlm_add_waiting_lock(lock);
313 /* Check if we need to prolong timeout */
314 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) &&
315 ldlm_lock_busy(lock)) {
318 if (lock->l_pending_chain.next == &waiting_locks_list)
322 spin_unlock_bh(&waiting_locks_spinlock);
323 LDLM_DEBUG(lock, "prolong the busy lock");
324 ldlm_refresh_waiting_lock(lock);
325 spin_lock_bh(&waiting_locks_spinlock);
335 lock->l_resource->lr_namespace->ns_timeouts++;
336 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
337 "evicting client at %s ",
338 cfs_time_current_sec()- lock->l_enqueued_time.tv_sec,
340 lock->l_export->exp_connection->c_peer.nid));
344 /* no needs to take an extra ref on the lock since it was in
345 * the waiting_locks_list and ldlm_add_waiting_lock()
346 * already grabbed a ref */
347 list_del(&lock->l_pending_chain);
348 list_add(&lock->l_pending_chain,
349 &expired_lock_thread.elt_expired_locks);
352 if (!list_empty(&expired_lock_thread.elt_expired_locks)) {
353 if (obd_dump_on_timeout)
354 expired_lock_thread.elt_dump = __LINE__;
356 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
360 * Make sure the timer will fire again if we have any locks
363 if (!list_empty(&waiting_locks_list)) {
364 cfs_time_t timeout_rounded;
365 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
367 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
368 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
370 spin_unlock_bh(&waiting_locks_spinlock);
374 * Indicate that we're waiting for a client to call us back cancelling a given
375 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
376 * timer to fire appropriately. (We round up to the next second, to avoid
377 * floods of timer firings during periods of high lock contention and traffic).
378 * As done by ldlm_add_waiting_lock(), the caller must grab a lock reference
379 * if it has been added to the waiting list (1 is returned).
381 * Called with the namespace lock held.
383 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock)
386 cfs_time_t timeout_rounded;
388 if (!list_empty(&lock->l_pending_chain))
391 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
392 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
395 timeout = ldlm_get_enq_timeout(lock);
397 timeout = cfs_time_shift(timeout);
398 if (likely(cfs_time_after(timeout, lock->l_callback_timeout)))
399 lock->l_callback_timeout = timeout;
401 timeout_rounded = round_timeout(lock->l_callback_timeout);
403 if (cfs_time_before(timeout_rounded,
404 cfs_timer_deadline(&waiting_locks_timer)) ||
405 !cfs_timer_is_armed(&waiting_locks_timer)) {
406 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
408 /* if the new lock has a shorter timeout than something earlier on
409 the list, we'll wait the longer amount of time; no big deal. */
410 list_add_tail(&lock->l_pending_chain, &waiting_locks_list); /* FIFO */
414 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
418 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
420 spin_lock_bh(&waiting_locks_spinlock);
421 if (lock->l_destroyed) {
422 static cfs_time_t next;
423 spin_unlock_bh(&waiting_locks_spinlock);
424 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
425 if (cfs_time_after(cfs_time_current(), next)) {
426 next = cfs_time_shift(14400);
427 libcfs_debug_dumpstack(NULL);
432 ret = __ldlm_add_waiting_lock(lock);
434 /* grab ref on the lock if it has been added to the
437 spin_unlock_bh(&waiting_locks_spinlock);
439 LDLM_DEBUG(lock, "%sadding to wait list",
440 ret == 0 ? "not re-" : "");
445 * Remove a lock from the pending list, likely because it had its cancellation
446 * callback arrive without incident. This adjusts the lock-timeout timer if
447 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
448 * As done by ldlm_del_waiting_lock(), the caller must release the lock
449 * reference when the lock is removed from any list (1 is returned).
451 * Called with namespace lock held.
453 static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
455 struct list_head *list_next;
457 if (list_empty(&lock->l_pending_chain))
460 list_next = lock->l_pending_chain.next;
461 if (lock->l_pending_chain.prev == &waiting_locks_list) {
462 /* Removing the head of the list, adjust timer. */
463 if (list_next == &waiting_locks_list) {
464 /* No more, just cancel. */
465 cfs_timer_disarm(&waiting_locks_timer);
467 struct ldlm_lock *next;
468 next = list_entry(list_next, struct ldlm_lock,
470 cfs_timer_arm(&waiting_locks_timer,
471 round_timeout(next->l_callback_timeout));
474 list_del_init(&lock->l_pending_chain);
479 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
483 if (lock->l_export == NULL) {
484 /* We don't have a "waiting locks list" on clients. */
485 LDLM_DEBUG(lock, "client lock: no-op");
489 spin_lock_bh(&waiting_locks_spinlock);
490 ret = __ldlm_del_waiting_lock(lock);
491 spin_unlock_bh(&waiting_locks_spinlock);
493 /* release lock ref if it has indeed been removed
497 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
504 * Called with namespace lock held.
506 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock)
508 if (lock->l_export == NULL) {
509 /* We don't have a "waiting locks list" on clients. */
510 LDLM_DEBUG(lock, "client lock: no-op");
514 spin_lock_bh(&waiting_locks_spinlock);
516 if (list_empty(&lock->l_pending_chain)) {
517 spin_unlock_bh(&waiting_locks_spinlock);
518 LDLM_DEBUG(lock, "wasn't waiting");
522 /* we remove/add the lock to the waiting list, so no needs to
523 * release/take a lock reference */
524 __ldlm_del_waiting_lock(lock);
525 __ldlm_add_waiting_lock(lock);
526 spin_unlock_bh(&waiting_locks_spinlock);
528 LDLM_DEBUG(lock, "refreshed");
531 #else /* !__KERNEL__ */
533 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
535 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
539 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
544 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock)
548 #endif /* __KERNEL__ */
550 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
551 const char *ast_type)
553 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
554 "to a lock %s callback time out: rc %d\n",
555 lock->l_export->exp_obd->obd_name,
556 obd_export_nid2str(lock->l_export), ast_type, rc);
558 if (obd_dump_on_timeout)
559 libcfs_debug_dumplog();
561 spin_lock_bh(&waiting_locks_spinlock);
562 if (__ldlm_del_waiting_lock(lock) == 0)
563 /* the lock was not in any list, grab an extra ref before adding
564 * the lock to the expired list */
566 list_add(&lock->l_pending_chain, &expired_lock_thread.elt_expired_locks);
567 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
568 spin_unlock_bh(&waiting_locks_spinlock);
570 class_fail_export(lock->l_export);
574 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
575 struct ptlrpc_request *req, int rc,
576 const char *ast_type)
578 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
580 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
581 LASSERT(lock->l_export);
582 if (lock->l_export->exp_libclient) {
583 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
584 " timeout, just cancelling lock", ast_type,
585 libcfs_nid2str(peer.nid));
586 ldlm_lock_cancel(lock);
588 } else if (lock->l_flags & LDLM_FL_CANCEL) {
589 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
590 "cancel was received (AST reply lost?)",
591 ast_type, libcfs_nid2str(peer.nid));
592 ldlm_lock_cancel(lock);
595 ldlm_del_waiting_lock(lock);
596 ldlm_failed_ast(lock, rc, ast_type);
600 LDLM_DEBUG(lock, "client (nid %s) returned %d"
601 " from %s AST - normal race",
602 libcfs_nid2str(peer.nid),
604 lustre_msg_get_status(req->rq_repmsg) : -1,
607 LDLM_ERROR(lock, "client (nid %s) returned %d "
608 "from %s AST", libcfs_nid2str(peer.nid),
609 (req->rq_repmsg != NULL) ?
610 lustre_msg_get_status(req->rq_repmsg) : 0,
612 ldlm_lock_cancel(lock);
613 /* Server-side AST functions are called from ldlm_reprocess_all,
614 * which needs to be told to please restart its reprocessing. */
621 static int ldlm_cb_interpret(const struct lu_env *env,
622 struct ptlrpc_request *req, void *data, int rc)
624 struct ldlm_cb_set_arg *arg;
625 struct ldlm_lock *lock;
628 LASSERT(data != NULL);
630 arg = req->rq_async_args.pointer_arg[0];
631 lock = req->rq_async_args.pointer_arg[1];
632 LASSERT(lock != NULL);
634 /* If client canceled the lock but the cancel has not
635 * been recieved yet, we need to update lvbo to have the
636 * proper attributes cached. */
637 if (rc == -EINVAL && arg->type == LDLM_BL_CALLBACK)
638 ldlm_res_lvbo_update(lock->l_resource, NULL,
640 rc = ldlm_handle_ast_error(lock, req, rc,
641 arg->type == LDLM_BL_CALLBACK
642 ? "blocking" : "completion");
645 LDLM_LOCK_RELEASE(lock);
648 atomic_set(&arg->restart, 1);
653 static inline int ldlm_bl_and_cp_ast_fini(struct ptlrpc_request *req,
654 struct ldlm_cb_set_arg *arg,
655 struct ldlm_lock *lock,
661 if (unlikely(instant_cancel)) {
662 rc = ptl_send_rpc(req, 1);
663 ptlrpc_req_finished(req);
665 /* If we cancelled the lock, we need to restart
666 * ldlm_reprocess_queue */
667 atomic_set(&arg->restart, 1);
670 ptlrpc_set_add_req(arg->set, req);
677 * Check if there are requests in the export request list which prevent
678 * the lock canceling and make these requests high priority ones.
680 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
682 struct ptlrpc_request *req;
685 if (lock->l_export == NULL) {
686 LDLM_DEBUG(lock, "client lock: no-op");
690 spin_lock(&lock->l_export->exp_lock);
691 list_for_each_entry(req, &lock->l_export->exp_queued_rpc, rq_exp_list) {
692 if (!req->rq_hp && req->rq_ops->hpreq_lock_match &&
693 req->rq_ops->hpreq_lock_match(req, lock))
694 ptlrpc_hpreq_reorder(req);
696 spin_unlock(&lock->l_export->exp_lock);
701 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
702 * enqueued server lock conflicts with given one.
704 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
705 * to wait for client response.
707 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
708 struct ldlm_lock_desc *desc,
709 void *data, int flag)
711 struct ldlm_cb_set_arg *arg = data;
712 struct ldlm_request *body;
713 struct ptlrpc_request *req;
714 int instant_cancel = 0;
718 if (flag == LDLM_CB_CANCELING)
719 /* Don't need to do anything here. */
723 LASSERT(data != NULL);
724 if (lock->l_export->exp_obd->obd_recovering != 0) {
725 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
726 ldlm_lock_dump(D_ERROR, lock, 0);
729 ldlm_lock_reorder_req(lock);
731 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
732 &RQF_LDLM_BL_CALLBACK,
733 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
737 req->rq_async_args.pointer_arg[0] = arg;
738 req->rq_async_args.pointer_arg[1] = lock;
739 req->rq_interpret_reply = ldlm_cb_interpret;
740 req->rq_no_resend = 1;
742 lock_res(lock->l_resource);
743 if (lock->l_granted_mode != lock->l_req_mode) {
744 /* this blocking AST will be communicated as part of the
745 * completion AST instead */
746 unlock_res(lock->l_resource);
747 ptlrpc_req_finished(req);
748 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
752 if (lock->l_destroyed) {
753 /* What's the point? */
754 unlock_res(lock->l_resource);
755 ptlrpc_req_finished(req);
759 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
762 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
763 body->lock_handle[0] = lock->l_remote_handle;
764 body->lock_desc = *desc;
765 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
767 LDLM_DEBUG(lock, "server preparing blocking AST");
769 ptlrpc_request_set_replen(req);
770 if (instant_cancel) {
771 unlock_res(lock->l_resource);
772 ldlm_lock_cancel(lock);
774 LASSERT(lock->l_granted_mode == lock->l_req_mode);
775 ldlm_add_waiting_lock(lock);
776 unlock_res(lock->l_resource);
779 req->rq_send_state = LUSTRE_IMP_FULL;
780 /* ptlrpc_prep_req already set timeout */
782 req->rq_timeout = ldlm_get_rq_timeout();
784 if (lock->l_export && lock->l_export->exp_nid_stats &&
785 lock->l_export->exp_nid_stats->nid_ldlm_stats)
786 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
787 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
789 rc = ldlm_bl_and_cp_ast_fini(req, arg, lock, instant_cancel);
794 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
796 struct ldlm_cb_set_arg *arg = data;
797 struct ldlm_request *body;
798 struct ptlrpc_request *req;
799 struct timeval granted_time;
800 long total_enqueue_wait;
801 int instant_cancel = 0;
805 LASSERT(lock != NULL);
806 LASSERT(data != NULL);
808 do_gettimeofday(&granted_time);
809 total_enqueue_wait = cfs_timeval_sub(&granted_time,
810 &lock->l_enqueued_time, NULL);
812 if (total_enqueue_wait / ONE_MILLION > obd_timeout)
813 /* non-fatal with AT - change to LDLM_DEBUG? */
814 LDLM_ERROR(lock, "enqueue wait took %luus from "CFS_TIME_T,
815 total_enqueue_wait, lock->l_enqueued_time.tv_sec);
817 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
818 &RQF_LDLM_CP_CALLBACK);
822 lock_res_and_lock(lock);
823 if (lock->l_resource->lr_lvb_len)
824 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
825 lock->l_resource->lr_lvb_len);
826 unlock_res_and_lock(lock);
828 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
830 ptlrpc_request_free(req);
834 req->rq_async_args.pointer_arg[0] = arg;
835 req->rq_async_args.pointer_arg[1] = lock;
836 req->rq_interpret_reply = ldlm_cb_interpret;
837 req->rq_no_resend = 1;
838 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
840 body->lock_handle[0] = lock->l_remote_handle;
841 body->lock_flags = flags;
842 ldlm_lock2desc(lock, &body->lock_desc);
843 if (lock->l_resource->lr_lvb_len) {
844 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
846 lock_res_and_lock(lock);
847 memcpy(lvb, lock->l_resource->lr_lvb_data,
848 lock->l_resource->lr_lvb_len);
849 unlock_res_and_lock(lock);
852 LDLM_DEBUG(lock, "server preparing completion AST (after %ldus wait)",
855 /* Server-side enqueue wait time estimate, used in
856 __ldlm_add_waiting_lock to set future enqueue timers */
857 at_add(&lock->l_resource->lr_namespace->ns_at_estimate,
858 total_enqueue_wait / ONE_MILLION);
860 ptlrpc_request_set_replen(req);
862 req->rq_send_state = LUSTRE_IMP_FULL;
863 /* ptlrpc_prep_req already set timeout */
865 req->rq_timeout = ldlm_get_rq_timeout();
867 /* We only send real blocking ASTs after the lock is granted */
868 lock_res_and_lock(lock);
869 if (lock->l_flags & LDLM_FL_AST_SENT) {
870 body->lock_flags |= LDLM_FL_AST_SENT;
872 /* We might get here prior to ldlm_handle_enqueue setting
873 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
874 * into waiting list, but this is safe and similar code in
875 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
876 * that would not only cancel the lock, but will also remove
877 * it from waiting list */
878 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
879 unlock_res_and_lock(lock);
880 ldlm_lock_cancel(lock);
882 lock_res_and_lock(lock);
884 /* start the lock-timeout clock */
885 ldlm_add_waiting_lock(lock);
888 unlock_res_and_lock(lock);
890 if (lock->l_export && lock->l_export->exp_nid_stats &&
891 lock->l_export->exp_nid_stats->nid_ldlm_stats)
892 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
893 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
895 rc = ldlm_bl_and_cp_ast_fini(req, arg, lock, instant_cancel);
900 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
902 struct ldlm_resource *res = lock->l_resource;
903 struct ldlm_request *body;
904 struct ptlrpc_request *req;
908 LASSERT(lock != NULL);
910 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
911 &RQF_LDLM_GL_CALLBACK,
912 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
917 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
918 body->lock_handle[0] = lock->l_remote_handle;
919 ldlm_lock2desc(lock, &body->lock_desc);
921 lock_res_and_lock(lock);
922 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
923 lock->l_resource->lr_lvb_len);
924 unlock_res_and_lock(lock);
925 res = lock->l_resource;
926 ptlrpc_request_set_replen(req);
929 req->rq_send_state = LUSTRE_IMP_FULL;
930 /* ptlrpc_prep_req already set timeout */
932 req->rq_timeout = ldlm_get_rq_timeout();
934 if (lock->l_export && lock->l_export->exp_nid_stats &&
935 lock->l_export->exp_nid_stats->nid_ldlm_stats)
936 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
937 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
939 rc = ptlrpc_queue_wait(req);
940 if (rc == -ELDLM_NO_LOCK_DATA)
941 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
943 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
945 rc = ldlm_res_lvbo_update(res, req->rq_repmsg,
947 ptlrpc_req_finished(req);
949 ldlm_reprocess_all(res);
955 extern unsigned long long lu_time_stamp_get(void);
957 #define lu_time_stamp_get() time(NULL)
960 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
961 struct lprocfs_stats *srv_stats)
963 int lock_type = 0, op = 0;
965 lock_type = dlm_req->lock_desc.l_resource.lr_type;
969 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
972 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
973 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
975 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
978 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
981 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
989 lprocfs_counter_incr(srv_stats, op);
995 * Main server-side entry point into LDLM. This is called by ptlrpc service
996 * threads to carry out client lock enqueueing requests.
998 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
999 struct ptlrpc_request *req,
1000 const struct ldlm_request *dlm_req,
1001 const struct ldlm_callback_suite *cbs)
1003 struct ldlm_reply *dlm_rep;
1005 ldlm_error_t err = ELDLM_OK;
1006 struct ldlm_lock *lock = NULL;
1007 void *cookie = NULL;
1011 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1013 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1014 flags = dlm_req->lock_flags;
1016 LASSERT(req->rq_export);
1018 if (req->rq_rqbd->rqbd_service->srv_stats)
1019 ldlm_svc_get_eopc(dlm_req,
1020 req->rq_rqbd->rqbd_service->srv_stats);
1022 if (req->rq_export && req->rq_export->exp_nid_stats &&
1023 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1024 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1025 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1027 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1028 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1029 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1030 dlm_req->lock_desc.l_resource.lr_type);
1031 GOTO(out, rc = -EFAULT);
1034 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1035 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1036 dlm_req->lock_desc.l_req_mode &
1037 (dlm_req->lock_desc.l_req_mode-1))) {
1038 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1039 dlm_req->lock_desc.l_req_mode);
1040 GOTO(out, rc = -EFAULT);
1043 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1044 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1046 DEBUG_REQ(D_ERROR, req,
1047 "PLAIN lock request from IBITS client?");
1048 GOTO(out, rc = -EPROTO);
1050 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1052 DEBUG_REQ(D_ERROR, req,
1053 "IBITS lock request from unaware client?");
1054 GOTO(out, rc = -EPROTO);
1058 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1059 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1060 ibits for mgc/mgs) */
1062 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1063 * inodebits lock if client does not support them. */
1064 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1065 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1066 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1067 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1068 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1069 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1070 dlm_req->lock_desc.l_req_mode = LCK_CR;
1074 if (unlikely(flags & LDLM_FL_REPLAY)) {
1075 /* Find an existing lock in the per-export lock hash */
1076 lock = lustre_hash_lookup(req->rq_export->exp_lock_hash,
1077 (void *)&dlm_req->lock_handle[0]);
1079 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1080 LPX64, lock->l_handle.h_cookie);
1081 GOTO(existing_lock, rc = 0);
1085 /* The lock's callback data might be set in the policy function */
1086 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1087 dlm_req->lock_desc.l_resource.lr_type,
1088 dlm_req->lock_desc.l_req_mode,
1092 GOTO(out, rc = -ENOMEM);
1094 do_gettimeofday(&lock->l_enqueued_time);
1095 lock->l_remote_handle = dlm_req->lock_handle[0];
1096 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1098 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1099 /* Don't enqueue a lock onto the export if it has already
1100 * been evicted. Cancel it now instead. (bug 3822) */
1101 if (req->rq_export->exp_failed) {
1102 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1103 GOTO(out, rc = -ENOTCONN);
1105 lock->l_export = class_export_get(req->rq_export);
1107 if (lock->l_export->exp_lock_hash)
1108 lustre_hash_add(lock->l_export->exp_lock_hash,
1109 &lock->l_remote_handle,
1114 if (flags & LDLM_FL_HAS_INTENT) {
1115 /* In this case, the reply buffer is allocated deep in
1116 * local_lock_enqueue by the policy function. */
1119 lock_res_and_lock(lock);
1120 if (lock->l_resource->lr_lvb_len) {
1121 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1123 lock->l_resource->lr_lvb_len);
1125 unlock_res_and_lock(lock);
1127 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1128 GOTO(out, rc = -ENOMEM);
1130 rc = req_capsule_server_pack(&req->rq_pill);
1135 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1136 lock->l_policy_data = dlm_req->lock_desc.l_policy_data;
1137 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1138 lock->l_req_extent = lock->l_policy_data.l_extent;
1140 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1144 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1145 dlm_rep->lock_flags = flags;
1147 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1148 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1150 /* We never send a blocking AST until the lock is granted, but
1151 * we can tell it right now */
1152 lock_res_and_lock(lock);
1154 /* Now take into account flags to be inherited from original lock
1155 request both in reply to client and in our own lock flags. */
1156 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1157 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1159 /* Don't move a pending lock onto the export if it has already
1160 * been evicted. Cancel it now instead. (bug 5683) */
1161 if (unlikely(req->rq_export->exp_failed ||
1162 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1163 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1165 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1166 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1167 if (lock->l_granted_mode == lock->l_req_mode) {
1169 * Only cancel lock if it was granted, because it would
1170 * be destroyed immediatelly and would never be granted
1171 * in the future, causing timeouts on client. Not
1172 * granted lock will be cancelled immediatelly after
1173 * sending completion AST.
1175 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1176 unlock_res_and_lock(lock);
1177 ldlm_lock_cancel(lock);
1178 lock_res_and_lock(lock);
1180 ldlm_add_waiting_lock(lock);
1183 /* Make sure we never ever grant usual metadata locks to liblustre
1185 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1186 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1187 req->rq_export->exp_libclient) {
1188 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1189 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1190 CERROR("Granting sync lock to libclient. "
1191 "req fl %d, rep fl %d, lock fl %d\n",
1192 dlm_req->lock_flags, dlm_rep->lock_flags,
1194 LDLM_ERROR(lock, "sync lock");
1195 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1196 struct ldlm_intent *it;
1198 it = req_capsule_client_get(&req->rq_pill,
1201 CERROR("This is intent %s ("LPU64")\n",
1202 ldlm_it2str(it->opc), it->opc);
1208 unlock_res_and_lock(lock);
1212 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1213 if (!req->rq_packed_final) {
1214 err = lustre_pack_reply(req, 1, NULL, NULL);
1219 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1220 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1222 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1223 "(err=%d, rc=%d)", err, rc);
1225 lock_res_and_lock(lock);
1227 if (lock->l_resource->lr_lvb_len > 0) {
1230 lvb = req_capsule_server_get(&req->rq_pill,
1232 LASSERTF(lvb != NULL, "req %p, lock %p\n",
1235 memcpy(lvb, lock->l_resource->lr_lvb_data,
1236 lock->l_resource->lr_lvb_len);
1239 ldlm_resource_unlink_lock(lock);
1240 ldlm_lock_destroy_nolock(lock);
1242 unlock_res_and_lock(lock);
1244 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1245 ldlm_reprocess_all(lock->l_resource);
1247 LDLM_LOCK_RELEASE(lock);
1250 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1256 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1257 ldlm_completion_callback completion_callback,
1258 ldlm_blocking_callback blocking_callback,
1259 ldlm_glimpse_callback glimpse_callback)
1261 struct ldlm_request *dlm_req;
1262 struct ldlm_callback_suite cbs = {
1263 .lcs_completion = completion_callback,
1264 .lcs_blocking = blocking_callback,
1265 .lcs_glimpse = glimpse_callback
1269 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1270 if (dlm_req != NULL) {
1271 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1272 req, dlm_req, &cbs);
1279 int ldlm_handle_convert0(struct ptlrpc_request *req,
1280 const struct ldlm_request *dlm_req)
1282 struct ldlm_reply *dlm_rep;
1283 struct ldlm_lock *lock;
1287 if (req->rq_export && req->rq_export->exp_nid_stats &&
1288 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1289 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1290 LDLM_CONVERT - LDLM_FIRST_OPC);
1292 rc = req_capsule_server_pack(&req->rq_pill);
1296 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1297 dlm_rep->lock_flags = dlm_req->lock_flags;
1299 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1301 req->rq_status = EINVAL;
1305 LDLM_DEBUG(lock, "server-side convert handler START");
1307 do_gettimeofday(&lock->l_enqueued_time);
1308 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1309 &dlm_rep->lock_flags);
1311 if (ldlm_del_waiting_lock(lock))
1312 LDLM_DEBUG(lock, "converted waiting lock");
1315 req->rq_status = EDEADLOCK;
1320 if (!req->rq_status)
1321 ldlm_reprocess_all(lock->l_resource);
1322 LDLM_DEBUG(lock, "server-side convert handler END");
1323 LDLM_LOCK_PUT(lock);
1325 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1330 int ldlm_handle_convert(struct ptlrpc_request *req)
1333 struct ldlm_request *dlm_req;
1335 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1336 if (dlm_req != NULL) {
1337 rc = ldlm_handle_convert0(req, dlm_req);
1339 CERROR ("Can't unpack dlm_req\n");
1345 /* Cancel all the locks whos handles are packed into ldlm_request */
1346 int ldlm_request_cancel(struct ptlrpc_request *req,
1347 const struct ldlm_request *dlm_req, int first)
1349 struct ldlm_resource *res, *pres = NULL;
1350 struct ldlm_lock *lock;
1351 int i, count, done = 0;
1354 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1358 /* There is no lock on the server at the replay time,
1359 * skip lock cancelling to make replay tests to pass. */
1360 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1363 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1364 "starting at %d", count, first);
1366 for (i = first; i < count; i++) {
1367 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1369 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1370 "lock (cookie "LPU64")",
1371 dlm_req->lock_handle[i].cookie);
1375 res = lock->l_resource;
1380 ldlm_reprocess_all(pres);
1381 LDLM_RESOURCE_DELREF(pres);
1382 ldlm_resource_putref(pres);
1385 ldlm_resource_getref(res);
1386 LDLM_RESOURCE_ADDREF(res);
1387 ldlm_res_lvbo_update(res, NULL, 0, 1);
1391 ldlm_lock_cancel(lock);
1392 LDLM_LOCK_PUT(lock);
1395 ldlm_reprocess_all(pres);
1396 LDLM_RESOURCE_DELREF(pres);
1397 ldlm_resource_putref(pres);
1399 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1403 int ldlm_handle_cancel(struct ptlrpc_request *req)
1405 struct ldlm_request *dlm_req;
1409 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1410 if (dlm_req == NULL) {
1411 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1415 if (req->rq_export && req->rq_export->exp_nid_stats &&
1416 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1417 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1418 LDLM_CANCEL - LDLM_FIRST_OPC);
1420 rc = req_capsule_server_pack(&req->rq_pill);
1424 if (!ldlm_request_cancel(req, dlm_req, 0))
1425 req->rq_status = ESTALE;
1427 if (ptlrpc_reply(req) != 0)
1433 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1434 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1439 LDLM_DEBUG(lock, "client blocking AST callback handler START");
1441 lock_res_and_lock(lock);
1442 lock->l_flags |= LDLM_FL_CBPENDING;
1444 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1445 lock->l_flags |= LDLM_FL_CANCEL;
1447 do_ast = (!lock->l_readers && !lock->l_writers);
1448 unlock_res_and_lock(lock);
1451 LDLM_DEBUG(lock, "already unused, calling "
1452 "callback (%p)", lock->l_blocking_ast);
1453 if (lock->l_blocking_ast != NULL)
1454 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1457 LDLM_DEBUG(lock, "Lock still has references, will be"
1458 " cancelled later");
1461 LDLM_DEBUG(lock, "client blocking callback handler END");
1462 LDLM_LOCK_RELEASE(lock);
1466 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1467 struct ldlm_namespace *ns,
1468 struct ldlm_request *dlm_req,
1469 struct ldlm_lock *lock)
1471 CFS_LIST_HEAD(ast_list);
1474 LDLM_DEBUG(lock, "client completion callback handler START");
1476 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1477 int to = cfs_time_seconds(1);
1479 cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE, to);
1480 if (lock->l_granted_mode == lock->l_req_mode ||
1486 lock_res_and_lock(lock);
1487 if (lock->l_destroyed ||
1488 lock->l_granted_mode == lock->l_req_mode) {
1489 /* bug 11300: the lock has already been granted */
1490 unlock_res_and_lock(lock);
1491 LDLM_DEBUG(lock, "Double grant race happened");
1492 LDLM_LOCK_RELEASE(lock);
1497 /* If we receive the completion AST before the actual enqueue returned,
1498 * then we might need to switch lock modes, resources, or extents. */
1499 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1500 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1501 LDLM_DEBUG(lock, "completion AST, new lock mode");
1504 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1505 lock->l_policy_data = dlm_req->lock_desc.l_policy_data;
1506 LDLM_DEBUG(lock, "completion AST, new policy data");
1509 ldlm_resource_unlink_lock(lock);
1510 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1511 &lock->l_resource->lr_name,
1512 sizeof(lock->l_resource->lr_name)) != 0) {
1513 unlock_res_and_lock(lock);
1514 if (ldlm_lock_change_resource(ns, lock,
1515 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1516 LDLM_ERROR(lock, "Failed to allocate resource");
1517 LDLM_LOCK_RELEASE(lock);
1521 LDLM_DEBUG(lock, "completion AST, new resource");
1522 CERROR("change resource!\n");
1523 lock_res_and_lock(lock);
1526 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1527 /* BL_AST locks are not needed in lru.
1528 * let ldlm_cancel_lru() be fast. */
1529 ldlm_lock_remove_from_lru(lock);
1530 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1531 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1534 if (lock->l_lvb_len) {
1535 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1536 RCL_CLIENT) < lock->l_lvb_len) {
1537 LDLM_ERROR(lock, "completion AST did not contain "
1540 void *lvb = req_capsule_client_swab_get(&req->rq_pill,
1542 (void *)lock->l_lvb_swabber);
1543 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1547 ldlm_grant_lock(lock, &ast_list);
1548 unlock_res_and_lock(lock);
1550 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1552 ldlm_run_ast_work(&ast_list, LDLM_WORK_CP_AST);
1554 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1556 LDLM_LOCK_RELEASE(lock);
1560 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1561 struct ldlm_namespace *ns,
1562 struct ldlm_request *dlm_req,
1563 struct ldlm_lock *lock)
1568 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1570 if (lock->l_glimpse_ast != NULL)
1571 rc = lock->l_glimpse_ast(lock, req);
1573 if (req->rq_repmsg != NULL) {
1576 req->rq_status = rc;
1580 lock_res_and_lock(lock);
1581 if (lock->l_granted_mode == LCK_PW &&
1582 !lock->l_readers && !lock->l_writers &&
1583 cfs_time_after(cfs_time_current(),
1584 cfs_time_add(lock->l_last_used,
1585 cfs_time_seconds(10)))) {
1586 unlock_res_and_lock(lock);
1587 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1588 ldlm_handle_bl_callback(ns, NULL, lock);
1593 unlock_res_and_lock(lock);
1594 LDLM_LOCK_RELEASE(lock);
1598 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1600 if (req->rq_no_reply)
1603 req->rq_status = rc;
1604 if (!req->rq_packed_final) {
1605 rc = lustre_pack_reply(req, 1, NULL, NULL);
1609 return ptlrpc_reply(req);
1613 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1614 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1615 struct list_head *cancels, int count)
1617 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1618 struct ldlm_bl_work_item *blwi;
1621 if (cancels && count == 0)
1624 OBD_ALLOC(blwi, sizeof(*blwi));
1630 blwi->blwi_ld = *ld;
1632 list_add(&blwi->blwi_head, cancels);
1633 list_del_init(cancels);
1634 blwi->blwi_count = count;
1636 blwi->blwi_lock = lock;
1638 spin_lock(&blp->blp_lock);
1639 if (lock && lock->l_flags & LDLM_FL_DISCARD_DATA) {
1640 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1641 list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1643 /* other blocking callbacks are added to the regular list */
1644 list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1646 cfs_waitq_signal(&blp->blp_waitq);
1647 spin_unlock(&blp->blp_lock);
1653 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1654 struct ldlm_lock *lock)
1657 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0));
1663 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1664 struct list_head *cancels, int count)
1667 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count));
1673 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1674 static int ldlm_callback_handler(struct ptlrpc_request *req)
1676 struct ldlm_namespace *ns;
1677 struct ldlm_request *dlm_req;
1678 struct ldlm_lock *lock;
1682 /* Requests arrive in sender's byte order. The ptlrpc service
1683 * handler has already checked and, if necessary, byte-swapped the
1684 * incoming request message body, but I am responsible for the
1685 * message buffers. */
1687 /* do nothing for sec context finalize */
1688 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1691 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1693 if (req->rq_export == NULL) {
1694 struct ldlm_request *dlm_req;
1696 CDEBUG(D_RPCTRACE, "operation %d from %s with bad "
1697 "export cookie "LPX64"; this is "
1698 "normal if this node rebooted with a lock held\n",
1699 lustre_msg_get_opc(req->rq_reqmsg),
1700 libcfs_id2str(req->rq_peer),
1701 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
1703 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1704 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1705 if (dlm_req != NULL)
1706 CDEBUG(D_RPCTRACE, "--> lock cookie: "LPX64"\n",
1707 dlm_req->lock_handle[0].cookie);
1709 ldlm_callback_reply(req, -ENOTCONN);
1713 LASSERT(req->rq_export != NULL);
1714 LASSERT(req->rq_export->exp_obd != NULL);
1716 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1717 case LDLM_BL_CALLBACK:
1718 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1721 case LDLM_CP_CALLBACK:
1722 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1725 case LDLM_GL_CALLBACK:
1726 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1729 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1730 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1731 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1733 rc = llog_origin_handle_cancel(req);
1734 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1736 ldlm_callback_reply(req, rc);
1738 case OBD_QC_CALLBACK:
1739 req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
1740 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
1742 rc = target_handle_qc_callback(req);
1743 ldlm_callback_reply(req, rc);
1747 /* reply in handler */
1748 req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
1749 rc = target_handle_dqacq_callback(req);
1751 case LLOG_ORIGIN_HANDLE_CREATE:
1752 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1753 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1755 rc = llog_origin_handle_create(req);
1756 ldlm_callback_reply(req, rc);
1758 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1759 req_capsule_set(&req->rq_pill,
1760 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1761 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1763 rc = llog_origin_handle_next_block(req);
1764 ldlm_callback_reply(req, rc);
1766 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1767 req_capsule_set(&req->rq_pill,
1768 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1769 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1771 rc = llog_origin_handle_read_header(req);
1772 ldlm_callback_reply(req, rc);
1774 case LLOG_ORIGIN_HANDLE_CLOSE:
1775 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1777 rc = llog_origin_handle_close(req);
1778 ldlm_callback_reply(req, rc);
1781 CERROR("unknown opcode %u\n",
1782 lustre_msg_get_opc(req->rq_reqmsg));
1783 ldlm_callback_reply(req, -EPROTO);
1787 ns = req->rq_export->exp_obd->obd_namespace;
1788 LASSERT(ns != NULL);
1790 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1792 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1793 if (dlm_req == NULL) {
1794 ldlm_callback_reply(req, -EPROTO);
1798 /* Force a known safe race, send a cancel to the server for a lock
1799 * which the server has already started a blocking callback on. */
1800 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
1801 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1802 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
1804 CERROR("ldlm_cli_cancel: %d\n", rc);
1807 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
1809 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
1810 "disappeared\n", dlm_req->lock_handle[0].cookie);
1811 ldlm_callback_reply(req, -EINVAL);
1815 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1816 lock_res_and_lock(lock);
1817 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1818 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1819 /* If somebody cancels locks and cache is already droped,
1820 * we can tell the server we have no lock. Otherwise, we
1821 * should send cancel after dropping the cache. */
1822 if ((lock->l_flags & LDLM_FL_CANCELING) &&
1823 (lock->l_flags & LDLM_FL_BL_DONE)) {
1824 LDLM_DEBUG(lock, "callback on lock "
1825 LPX64" - lock disappeared\n",
1826 dlm_req->lock_handle[0].cookie);
1827 unlock_res_and_lock(lock);
1828 LDLM_LOCK_RELEASE(lock);
1829 ldlm_callback_reply(req, -EINVAL);
1832 /* BL_AST locks are not needed in lru.
1833 * let ldlm_cancel_lru() be fast. */
1834 ldlm_lock_remove_from_lru(lock);
1835 lock->l_flags |= LDLM_FL_BL_AST;
1837 unlock_res_and_lock(lock);
1839 /* We want the ost thread to get this reply so that it can respond
1840 * to ost requests (write cache writeback) that might be triggered
1843 * But we'd also like to be able to indicate in the reply that we're
1844 * cancelling right now, because it's unused, or have an intent result
1845 * in the reply, so we might have to push the responsibility for sending
1846 * the reply down into the AST handlers, alas. */
1848 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1849 case LDLM_BL_CALLBACK:
1850 CDEBUG(D_INODE, "blocking ast\n");
1851 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
1852 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK))
1853 ldlm_callback_reply(req, 0);
1854 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
1855 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
1857 case LDLM_CP_CALLBACK:
1858 CDEBUG(D_INODE, "completion ast\n");
1859 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
1860 ldlm_callback_reply(req, 0);
1861 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
1863 case LDLM_GL_CALLBACK:
1864 CDEBUG(D_INODE, "glimpse ast\n");
1865 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
1866 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
1869 LBUG(); /* checked above */
1875 static int ldlm_cancel_handler(struct ptlrpc_request *req)
1880 /* Requests arrive in sender's byte order. The ptlrpc service
1881 * handler has already checked and, if necessary, byte-swapped the
1882 * incoming request message body, but I am responsible for the
1883 * message buffers. */
1885 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1887 if (req->rq_export == NULL) {
1888 struct ldlm_request *dlm_req;
1890 CERROR("operation %d from %s with bad export cookie "LPU64"\n",
1891 lustre_msg_get_opc(req->rq_reqmsg),
1892 libcfs_id2str(req->rq_peer),
1893 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
1895 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1896 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1897 if (dlm_req != NULL)
1898 ldlm_lock_dump_handle(D_ERROR,
1899 &dlm_req->lock_handle[0]);
1900 ldlm_callback_reply(req, -ENOTCONN);
1904 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1906 /* XXX FIXME move this back to mds/handler.c, bug 249 */
1908 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
1909 CDEBUG(D_INODE, "cancel\n");
1910 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
1912 rc = ldlm_handle_cancel(req);
1916 case OBD_LOG_CANCEL:
1917 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1918 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1920 rc = llog_origin_handle_cancel(req);
1921 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1923 ldlm_callback_reply(req, rc);
1926 CERROR("invalid opcode %d\n",
1927 lustre_msg_get_opc(req->rq_reqmsg));
1928 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1929 ldlm_callback_reply(req, -EINVAL);
1935 void ldlm_revoke_lock_cb(void *obj, void *data)
1937 struct list_head *rpc_list = data;
1938 struct ldlm_lock *lock = obj;
1940 lock_res_and_lock(lock);
1942 if (lock->l_req_mode != lock->l_granted_mode) {
1943 unlock_res_and_lock(lock);
1947 LASSERT(lock->l_resource);
1948 if (lock->l_resource->lr_type != LDLM_IBITS &&
1949 lock->l_resource->lr_type != LDLM_PLAIN) {
1950 unlock_res_and_lock(lock);
1954 if (lock->l_flags & LDLM_FL_AST_SENT) {
1955 unlock_res_and_lock(lock);
1959 LASSERT(lock->l_blocking_ast);
1960 LASSERT(!lock->l_blocking_lock);
1962 lock->l_flags |= LDLM_FL_AST_SENT;
1963 if (lock->l_export && lock->l_export->exp_lock_hash &&
1964 !hlist_unhashed(&lock->l_exp_hash))
1965 lustre_hash_del(lock->l_export->exp_lock_hash,
1966 &lock->l_remote_handle, &lock->l_exp_hash);
1967 list_add_tail(&lock->l_rk_ast, rpc_list);
1968 LDLM_LOCK_GET(lock);
1970 unlock_res_and_lock(lock);
1973 void ldlm_revoke_export_locks(struct obd_export *exp)
1975 struct list_head rpc_list;
1978 CFS_INIT_LIST_HEAD(&rpc_list);
1979 lustre_hash_for_each_empty(exp->exp_lock_hash,
1980 ldlm_revoke_lock_cb, &rpc_list);
1981 ldlm_run_ast_work(&rpc_list, LDLM_WORK_REVOKE_AST);
1987 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
1989 struct ldlm_bl_work_item *blwi = NULL;
1990 static unsigned int num_bl = 0;
1992 spin_lock(&blp->blp_lock);
1993 /* process a request from the blp_list at least every blp_num_threads */
1994 if (!list_empty(&blp->blp_list) &&
1995 (list_empty(&blp->blp_prio_list) || num_bl == 0))
1996 blwi = list_entry(blp->blp_list.next,
1997 struct ldlm_bl_work_item, blwi_entry);
1999 if (!list_empty(&blp->blp_prio_list))
2000 blwi = list_entry(blp->blp_prio_list.next,
2001 struct ldlm_bl_work_item, blwi_entry);
2004 if (++num_bl >= atomic_read(&blp->blp_num_threads))
2006 list_del(&blwi->blwi_entry);
2008 spin_unlock(&blp->blp_lock);
2013 /* This only contains temporary data until the thread starts */
2014 struct ldlm_bl_thread_data {
2015 char bltd_name[CFS_CURPROC_COMM_MAX];
2016 struct ldlm_bl_pool *bltd_blp;
2017 struct completion bltd_comp;
2021 static int ldlm_bl_thread_main(void *arg);
2023 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2025 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2028 init_completion(&bltd.bltd_comp);
2029 rc = cfs_kernel_thread(ldlm_bl_thread_main, &bltd, 0);
2031 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2032 atomic_read(&blp->blp_num_threads), rc);
2035 wait_for_completion(&bltd.bltd_comp);
2040 static int ldlm_bl_thread_main(void *arg)
2042 struct ldlm_bl_pool *blp;
2046 struct ldlm_bl_thread_data *bltd = arg;
2048 blp = bltd->bltd_blp;
2050 bltd->bltd_num = atomic_inc_return(&blp->blp_num_threads) - 1;
2051 atomic_inc(&blp->blp_busy_threads);
2053 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2054 "ldlm_bl_%02d", bltd->bltd_num);
2055 cfs_daemonize(bltd->bltd_name);
2057 complete(&bltd->bltd_comp);
2058 /* cannot use bltd after this, it is only on caller's stack */
2062 struct l_wait_info lwi = { 0 };
2063 struct ldlm_bl_work_item *blwi = NULL;
2065 blwi = ldlm_bl_get_work(blp);
2070 atomic_dec(&blp->blp_busy_threads);
2071 l_wait_event_exclusive(blp->blp_waitq,
2072 (blwi = ldlm_bl_get_work(blp)) != NULL,
2074 busy = atomic_inc_return(&blp->blp_busy_threads);
2076 if (blwi->blwi_ns == NULL)
2077 /* added by ldlm_cleanup() */
2080 /* Not fatal if racy and have a few too many threads */
2081 if (unlikely(busy < blp->blp_max_threads &&
2082 busy >= atomic_read(&blp->blp_num_threads)))
2083 /* discard the return value, we tried */
2084 ldlm_bl_thread_start(blp);
2086 if (blwi->blwi_ns == NULL)
2087 /* added by ldlm_cleanup() */
2091 if (blwi->blwi_count) {
2092 /* The special case when we cancel locks in lru
2093 * asynchronously, we pass the list of locks here.
2094 * Thus lock is marked LDLM_FL_CANCELING, and already
2095 * canceled locally. */
2096 ldlm_cli_cancel_list(&blwi->blwi_head,
2097 blwi->blwi_count, NULL, 0);
2099 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2102 OBD_FREE(blwi, sizeof(*blwi));
2105 atomic_dec(&blp->blp_busy_threads);
2106 atomic_dec(&blp->blp_num_threads);
2107 complete(&blp->blp_comp);
2113 static int ldlm_setup(void);
2114 static int ldlm_cleanup(void);
2116 int ldlm_get_ref(void)
2120 mutex_down(&ldlm_ref_sem);
2121 if (++ldlm_refcount == 1) {
2126 mutex_up(&ldlm_ref_sem);
2131 void ldlm_put_ref(void)
2134 mutex_down(&ldlm_ref_sem);
2135 if (ldlm_refcount == 1) {
2136 int rc = ldlm_cleanup();
2138 CERROR("ldlm_cleanup failed: %d\n", rc);
2144 mutex_up(&ldlm_ref_sem);
2150 * Export handle<->lock hash operations.
2153 ldlm_export_lock_hash(lustre_hash_t *lh, void *key, unsigned mask)
2155 return lh_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2159 ldlm_export_lock_key(struct hlist_node *hnode)
2161 struct ldlm_lock *lock;
2164 lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2165 RETURN(&lock->l_remote_handle);
2169 ldlm_export_lock_compare(void *key, struct hlist_node *hnode)
2172 RETURN(lustre_handle_equal(ldlm_export_lock_key(hnode), key));
2176 ldlm_export_lock_get(struct hlist_node *hnode)
2178 struct ldlm_lock *lock;
2181 lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2182 LDLM_LOCK_GET(lock);
2188 ldlm_export_lock_put(struct hlist_node *hnode)
2190 struct ldlm_lock *lock;
2193 lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2194 LDLM_LOCK_RELEASE(lock);
2199 static lustre_hash_ops_t ldlm_export_lock_ops = {
2200 .lh_hash = ldlm_export_lock_hash,
2201 .lh_key = ldlm_export_lock_key,
2202 .lh_compare = ldlm_export_lock_compare,
2203 .lh_get = ldlm_export_lock_get,
2204 .lh_put = ldlm_export_lock_put
2207 int ldlm_init_export(struct obd_export *exp)
2211 exp->exp_lock_hash =
2212 lustre_hash_init(obd_uuid2str(&exp->exp_client_uuid),
2213 7, 16, &ldlm_export_lock_ops, LH_REHASH);
2215 if (!exp->exp_lock_hash)
2220 EXPORT_SYMBOL(ldlm_init_export);
2222 void ldlm_destroy_export(struct obd_export *exp)
2225 lustre_hash_exit(exp->exp_lock_hash);
2226 exp->exp_lock_hash = NULL;
2229 EXPORT_SYMBOL(ldlm_destroy_export);
2231 static int ldlm_setup(void)
2233 struct ldlm_bl_pool *blp;
2235 int ldlm_min_threads = LDLM_THREADS_AUTO_MIN;
2236 int ldlm_max_threads = LDLM_THREADS_AUTO_MAX;
2242 if (ldlm_state != NULL)
2245 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2246 if (ldlm_state == NULL)
2250 rc = ldlm_proc_setup();
2256 if (ldlm_num_threads) {
2257 /* If ldlm_num_threads is set, it is the min and the max. */
2258 if (ldlm_num_threads > LDLM_THREADS_AUTO_MAX)
2259 ldlm_num_threads = LDLM_THREADS_AUTO_MAX;
2260 if (ldlm_num_threads < LDLM_THREADS_AUTO_MIN)
2261 ldlm_num_threads = LDLM_THREADS_AUTO_MIN;
2262 ldlm_min_threads = ldlm_max_threads = ldlm_num_threads;
2266 ldlm_state->ldlm_cb_service =
2267 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2268 LDLM_MAXREPSIZE, LDLM_CB_REQUEST_PORTAL,
2269 LDLM_CB_REPLY_PORTAL, 1800,
2270 ldlm_callback_handler, "ldlm_cbd",
2271 ldlm_svc_proc_dir, NULL,
2272 ldlm_min_threads, ldlm_max_threads,
2274 LCT_MD_THREAD|LCT_DT_THREAD, NULL);
2276 if (!ldlm_state->ldlm_cb_service) {
2277 CERROR("failed to start service\n");
2278 GOTO(out_proc, rc = -ENOMEM);
2281 ldlm_state->ldlm_cancel_service =
2282 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2283 LDLM_MAXREPSIZE, LDLM_CANCEL_REQUEST_PORTAL,
2284 LDLM_CANCEL_REPLY_PORTAL, 6000,
2285 ldlm_cancel_handler, "ldlm_canceld",
2286 ldlm_svc_proc_dir, NULL,
2287 ldlm_min_threads, ldlm_max_threads,
2289 LCT_MD_THREAD|LCT_DT_THREAD|LCT_CL_THREAD,
2292 if (!ldlm_state->ldlm_cancel_service) {
2293 CERROR("failed to start service\n");
2294 GOTO(out_proc, rc = -ENOMEM);
2297 OBD_ALLOC(blp, sizeof(*blp));
2299 GOTO(out_proc, rc = -ENOMEM);
2300 ldlm_state->ldlm_bl_pool = blp;
2302 spin_lock_init(&blp->blp_lock);
2303 CFS_INIT_LIST_HEAD(&blp->blp_list);
2304 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2305 cfs_waitq_init(&blp->blp_waitq);
2306 atomic_set(&blp->blp_num_threads, 0);
2307 atomic_set(&blp->blp_busy_threads, 0);
2308 blp->blp_min_threads = ldlm_min_threads;
2309 blp->blp_max_threads = ldlm_max_threads;
2312 for (i = 0; i < blp->blp_min_threads; i++) {
2313 rc = ldlm_bl_thread_start(blp);
2315 GOTO(out_thread, rc);
2318 rc = ptlrpc_start_threads(NULL, ldlm_state->ldlm_cancel_service);
2320 GOTO(out_thread, rc);
2322 rc = ptlrpc_start_threads(NULL, ldlm_state->ldlm_cb_service);
2324 GOTO(out_thread, rc);
2326 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2327 expired_lock_thread.elt_state = ELT_STOPPED;
2328 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2330 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2331 spin_lock_init(&waiting_locks_spinlock);
2332 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2334 rc = cfs_kernel_thread(expired_lock_main, NULL, CLONE_VM | CLONE_FILES);
2336 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2337 GOTO(out_thread, rc);
2340 wait_event(expired_lock_thread.elt_waitq,
2341 expired_lock_thread.elt_state == ELT_READY);
2345 rc = ldlm_pools_init();
2347 GOTO(out_thread, rc);
2353 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2354 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2359 ldlm_proc_cleanup();
2362 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2367 static int ldlm_cleanup(void)
2370 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2374 if (!list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2375 !list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2376 CERROR("ldlm still has namespaces; clean these up first.\n");
2377 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2378 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2387 while (atomic_read(&blp->blp_num_threads) > 0) {
2388 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2390 init_completion(&blp->blp_comp);
2392 spin_lock(&blp->blp_lock);
2393 list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2394 cfs_waitq_signal(&blp->blp_waitq);
2395 spin_unlock(&blp->blp_lock);
2397 wait_for_completion(&blp->blp_comp);
2399 OBD_FREE(blp, sizeof(*blp));
2401 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2402 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2403 ldlm_proc_cleanup();
2405 expired_lock_thread.elt_state = ELT_TERMINATE;
2406 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2407 wait_event(expired_lock_thread.elt_waitq,
2408 expired_lock_thread.elt_state == ELT_STOPPED);
2410 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2411 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2414 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2420 int __init ldlm_init(void)
2422 init_mutex(&ldlm_ref_sem);
2423 init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2424 init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2425 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2426 sizeof(struct ldlm_resource), 0,
2427 SLAB_HWCACHE_ALIGN);
2428 if (ldlm_resource_slab == NULL)
2431 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2432 sizeof(struct ldlm_lock), 0,
2433 SLAB_HWCACHE_ALIGN);
2434 if (ldlm_lock_slab == NULL) {
2435 cfs_mem_cache_destroy(ldlm_resource_slab);
2439 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2440 sizeof(struct ldlm_interval),
2441 0, SLAB_HWCACHE_ALIGN);
2442 if (ldlm_interval_slab == NULL) {
2443 cfs_mem_cache_destroy(ldlm_resource_slab);
2444 cfs_mem_cache_destroy(ldlm_lock_slab);
2451 void __exit ldlm_exit(void)
2455 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2456 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2457 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2458 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2459 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2460 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2461 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2465 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2468 EXPORT_SYMBOL(ldlm_get_processing_policy);
2469 EXPORT_SYMBOL(ldlm_lock2desc);
2470 EXPORT_SYMBOL(ldlm_register_intent);
2471 EXPORT_SYMBOL(ldlm_lockname);
2472 EXPORT_SYMBOL(ldlm_typename);
2473 EXPORT_SYMBOL(ldlm_lock2handle);
2474 EXPORT_SYMBOL(__ldlm_handle2lock);
2475 EXPORT_SYMBOL(ldlm_lock_get);
2476 EXPORT_SYMBOL(ldlm_lock_put);
2477 EXPORT_SYMBOL(ldlm_lock_match);
2478 EXPORT_SYMBOL(ldlm_lock_cancel);
2479 EXPORT_SYMBOL(ldlm_lock_addref);
2480 EXPORT_SYMBOL(ldlm_lock_addref_try);
2481 EXPORT_SYMBOL(ldlm_lock_decref);
2482 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2483 EXPORT_SYMBOL(ldlm_lock_change_resource);
2484 EXPORT_SYMBOL(ldlm_it2str);
2485 EXPORT_SYMBOL(ldlm_lock_dump);
2486 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2487 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
2488 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2489 EXPORT_SYMBOL(ldlm_lock_allow_match);
2490 EXPORT_SYMBOL(ldlm_lock_downgrade);
2491 EXPORT_SYMBOL(ldlm_lock_convert);
2493 /* ldlm_request.c */
2494 EXPORT_SYMBOL(ldlm_completion_ast_async);
2495 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2496 EXPORT_SYMBOL(ldlm_completion_ast);
2497 EXPORT_SYMBOL(ldlm_blocking_ast);
2498 EXPORT_SYMBOL(ldlm_glimpse_ast);
2499 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2500 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2501 EXPORT_SYMBOL(ldlm_prep_elc_req);
2502 EXPORT_SYMBOL(ldlm_cli_convert);
2503 EXPORT_SYMBOL(ldlm_cli_enqueue);
2504 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2505 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2506 EXPORT_SYMBOL(ldlm_cli_cancel);
2507 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2508 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2509 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2510 EXPORT_SYMBOL(ldlm_replay_locks);
2511 EXPORT_SYMBOL(ldlm_resource_foreach);
2512 EXPORT_SYMBOL(ldlm_namespace_foreach);
2513 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
2514 EXPORT_SYMBOL(ldlm_resource_iterate);
2515 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2516 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2519 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2520 EXPORT_SYMBOL(ldlm_server_completion_ast);
2521 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2522 EXPORT_SYMBOL(ldlm_handle_enqueue);
2523 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2524 EXPORT_SYMBOL(ldlm_handle_cancel);
2525 EXPORT_SYMBOL(ldlm_request_cancel);
2526 EXPORT_SYMBOL(ldlm_handle_convert);
2527 EXPORT_SYMBOL(ldlm_handle_convert0);
2528 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2529 EXPORT_SYMBOL(ldlm_get_ref);
2530 EXPORT_SYMBOL(ldlm_put_ref);
2531 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2532 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2534 /* ldlm_resource.c */
2535 EXPORT_SYMBOL(ldlm_namespace_new);
2536 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2537 EXPORT_SYMBOL(ldlm_namespace_free);
2538 EXPORT_SYMBOL(ldlm_namespace_dump);
2539 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2540 EXPORT_SYMBOL(ldlm_resource_get);
2541 EXPORT_SYMBOL(ldlm_resource_putref);
2542 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2545 EXPORT_SYMBOL(client_import_add_conn);
2546 EXPORT_SYMBOL(client_import_del_conn);
2547 EXPORT_SYMBOL(client_obd_setup);
2548 EXPORT_SYMBOL(client_obd_cleanup);
2549 EXPORT_SYMBOL(client_connect_import);
2550 EXPORT_SYMBOL(client_disconnect_export);
2551 EXPORT_SYMBOL(target_start_recovery_thread);
2552 EXPORT_SYMBOL(target_stop_recovery_thread);
2553 EXPORT_SYMBOL(target_handle_connect);
2554 EXPORT_SYMBOL(target_cleanup_recovery);
2555 EXPORT_SYMBOL(target_destroy_export);
2556 EXPORT_SYMBOL(target_cancel_recovery_timer);
2557 EXPORT_SYMBOL(target_send_reply);
2558 EXPORT_SYMBOL(target_queue_recovery_request);
2559 EXPORT_SYMBOL(target_handle_ping);
2560 EXPORT_SYMBOL(target_pack_pool_reply);
2561 EXPORT_SYMBOL(target_handle_disconnect);
2564 EXPORT_SYMBOL(lock_res_and_lock);
2565 EXPORT_SYMBOL(unlock_res_and_lock);