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 [sun.com URL with a
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");
207 export = class_export_get(lock->l_export);
208 spin_unlock_bh(&waiting_locks_spinlock);
211 class_fail_export(export);
212 class_export_put(export);
213 spin_lock_bh(&waiting_locks_spinlock);
215 spin_unlock_bh(&waiting_locks_spinlock);
217 if (do_dump && obd_dump_on_eviction) {
218 CERROR("dump the log upon eviction\n");
219 libcfs_debug_dumplog();
222 if (expired_lock_thread.elt_state == ELT_TERMINATE)
226 expired_lock_thread.elt_state = ELT_STOPPED;
227 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
231 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
233 /* This is called from within a timer interrupt and cannot schedule */
234 static void waiting_locks_callback(unsigned long unused)
236 struct ldlm_lock *lock, *last = NULL;
239 spin_lock_bh(&waiting_locks_spinlock);
240 while (!list_empty(&waiting_locks_list)) {
241 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
244 if (cfs_time_after(lock->l_callback_timeout, cfs_time_current()) ||
245 (lock->l_req_mode == LCK_GROUP))
248 if (ptlrpc_check_suspend()) {
249 /* there is a case when we talk to one mds, holding
250 * lock from another mds. this way we easily can get
251 * here, if second mds is being recovered. so, we
252 * suspend timeouts. bug 6019 */
254 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
255 lock->l_export->exp_client_uuid.uuid,
256 lock->l_export->exp_connection->c_remote_uuid.uuid,
257 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
259 list_del_init(&lock->l_pending_chain);
260 spin_unlock_bh(&waiting_locks_spinlock);
261 ldlm_add_waiting_lock(lock);
265 /* if timeout overlaps the activation time of suspended timeouts
266 * then extend it to give a chance for client to reconnect */
267 if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
268 cfs_time_seconds(obd_timeout)/2),
269 ptlrpc_suspend_wakeup_time())) {
270 LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
271 lock->l_export->exp_client_uuid.uuid,
272 lock->l_export->exp_connection->c_remote_uuid.uuid,
273 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
275 list_del_init(&lock->l_pending_chain);
276 spin_unlock_bh(&waiting_locks_spinlock);
277 ldlm_add_waiting_lock(lock);
281 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
282 "evicting client at %s ",
283 cfs_time_current_sec()- lock->l_enqueued_time.tv_sec,
285 lock->l_export->exp_connection->c_peer.nid));
289 list_del(&lock->l_pending_chain);
290 list_add(&lock->l_pending_chain,
291 &expired_lock_thread.elt_expired_locks);
294 if (!list_empty(&expired_lock_thread.elt_expired_locks)) {
295 if (obd_dump_on_timeout)
296 expired_lock_thread.elt_dump = __LINE__;
298 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
302 * Make sure the timer will fire again if we have any locks
305 if (!list_empty(&waiting_locks_list)) {
306 cfs_time_t timeout_rounded;
307 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
309 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
310 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
312 spin_unlock_bh(&waiting_locks_spinlock);
316 * Indicate that we're waiting for a client to call us back cancelling a given
317 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
318 * timer to fire appropriately. (We round up to the next second, to avoid
319 * floods of timer firings during periods of high lock contention and traffic).
321 * Called with the namespace lock held.
323 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock)
326 cfs_time_t timeout_rounded;
328 if (!list_empty(&lock->l_pending_chain))
331 timeout = ldlm_get_enq_timeout(lock);
333 lock->l_callback_timeout = cfs_time_shift(timeout);
335 timeout_rounded = round_timeout(lock->l_callback_timeout);
337 if (cfs_time_before(timeout_rounded,
338 cfs_timer_deadline(&waiting_locks_timer)) ||
339 !cfs_timer_is_armed(&waiting_locks_timer)) {
340 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
342 /* if the new lock has a shorter timeout than something earlier on
343 the list, we'll wait the longer amount of time; no big deal. */
344 list_add_tail(&lock->l_pending_chain, &waiting_locks_list); /* FIFO */
348 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
352 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
354 spin_lock_bh(&waiting_locks_spinlock);
355 if (lock->l_destroyed) {
356 static cfs_time_t next;
357 spin_unlock_bh(&waiting_locks_spinlock);
358 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
359 if (cfs_time_after(cfs_time_current(), next)) {
360 next = cfs_time_shift(14400);
361 libcfs_debug_dumpstack(NULL);
366 ret = __ldlm_add_waiting_lock(lock);
367 spin_unlock_bh(&waiting_locks_spinlock);
369 LDLM_DEBUG(lock, "%sadding to wait list",
370 ret == 0 ? "not re-" : "");
375 * Remove a lock from the pending list, likely because it had its cancellation
376 * callback arrive without incident. This adjusts the lock-timeout timer if
377 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
379 * Called with namespace lock held.
381 int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
383 struct list_head *list_next;
385 if (list_empty(&lock->l_pending_chain))
388 list_next = lock->l_pending_chain.next;
389 if (lock->l_pending_chain.prev == &waiting_locks_list) {
390 /* Removing the head of the list, adjust timer. */
391 if (list_next == &waiting_locks_list) {
392 /* No more, just cancel. */
393 cfs_timer_disarm(&waiting_locks_timer);
395 struct ldlm_lock *next;
396 next = list_entry(list_next, struct ldlm_lock,
398 cfs_timer_arm(&waiting_locks_timer,
399 round_timeout(next->l_callback_timeout));
402 list_del_init(&lock->l_pending_chain);
407 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
411 if (lock->l_export == NULL) {
412 /* We don't have a "waiting locks list" on clients. */
413 LDLM_DEBUG(lock, "client lock: no-op");
417 spin_lock_bh(&waiting_locks_spinlock);
418 ret = __ldlm_del_waiting_lock(lock);
419 spin_unlock_bh(&waiting_locks_spinlock);
421 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
428 * Called with namespace lock held.
430 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock)
432 if (lock->l_export == NULL) {
433 /* We don't have a "waiting locks list" on clients. */
434 LDLM_DEBUG(lock, "client lock: no-op");
438 spin_lock_bh(&waiting_locks_spinlock);
440 if (list_empty(&lock->l_pending_chain)) {
441 spin_unlock_bh(&waiting_locks_spinlock);
442 LDLM_DEBUG(lock, "wasn't waiting");
446 __ldlm_del_waiting_lock(lock);
447 __ldlm_add_waiting_lock(lock);
448 spin_unlock_bh(&waiting_locks_spinlock);
450 LDLM_DEBUG(lock, "refreshed");
454 #else /* !__KERNEL__ */
456 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
458 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
462 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
467 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock)
471 #endif /* __KERNEL__ */
473 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
474 const char *ast_type)
476 struct ptlrpc_connection *conn = lock->l_export->exp_connection;
477 char *str = libcfs_nid2str(conn->c_peer.nid);
479 LCONSOLE_ERROR_MSG(0x138, "A client on nid %s was evicted from "
480 "service %s.\n", str,
481 lock->l_export->exp_obd->obd_name);
483 LCONSOLE_ERROR_MSG(0x012, "Lock %s callback to %s timed out for "
484 "resource %d\n", ast_type,
485 obd_export_nid2str(lock->l_export), rc);
487 if (obd_dump_on_timeout)
488 libcfs_debug_dumplog();
489 class_fail_export(lock->l_export);
492 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
493 struct ptlrpc_request *req, int rc,
494 const char *ast_type)
496 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
498 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
499 LASSERT(lock->l_export);
500 if (lock->l_export->exp_libclient) {
501 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
502 " timeout, just cancelling lock", ast_type,
503 libcfs_nid2str(peer.nid));
504 ldlm_lock_cancel(lock);
506 } else if (lock->l_flags & LDLM_FL_CANCEL) {
507 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
508 "cancel was received (AST reply lost?)",
509 ast_type, libcfs_nid2str(peer.nid));
510 ldlm_lock_cancel(lock);
513 ldlm_del_waiting_lock(lock);
514 ldlm_failed_ast(lock, rc, ast_type);
518 LDLM_DEBUG(lock, "client (nid %s) returned %d"
519 " from %s AST - normal race",
520 libcfs_nid2str(peer.nid),
522 lustre_msg_get_status(req->rq_repmsg) : -1,
525 LDLM_ERROR(lock, "client (nid %s) returned %d "
526 "from %s AST", libcfs_nid2str(peer.nid),
527 (req->rq_repmsg != NULL) ?
528 lustre_msg_get_status(req->rq_repmsg) : 0,
530 ldlm_lock_cancel(lock);
531 /* Server-side AST functions are called from ldlm_reprocess_all,
532 * which needs to be told to please restart its reprocessing. */
539 static int ldlm_cb_interpret(struct ptlrpc_request *req, void *data, int rc)
541 struct ldlm_cb_set_arg *arg;
542 struct ldlm_lock *lock;
545 LASSERT(data != NULL);
547 arg = req->rq_async_args.pointer_arg[0];
548 lock = req->rq_async_args.pointer_arg[1];
549 LASSERT(lock != NULL);
551 /* If client canceled the lock but the cancel has not
552 * been recieved yet, we need to update lvbo to have the
553 * proper attributes cached. */
554 if (rc == -EINVAL && arg->type == LDLM_BL_CALLBACK)
555 ldlm_res_lvbo_update(lock->l_resource, NULL,
557 rc = ldlm_handle_ast_error(lock, req, rc,
558 arg->type == LDLM_BL_CALLBACK
559 ? "blocking" : "completion");
565 atomic_set(&arg->restart, 1);
570 static inline int ldlm_bl_and_cp_ast_fini(struct ptlrpc_request *req,
571 struct ldlm_cb_set_arg *arg,
572 struct ldlm_lock *lock,
578 if (unlikely(instant_cancel)) {
579 rc = ptl_send_rpc(req, 1);
580 ptlrpc_req_finished(req);
582 /* If we cancelled the lock, we need to restart
583 * ldlm_reprocess_queue */
584 atomic_set(&arg->restart, 1);
587 ptlrpc_set_add_req(arg->set, req);
594 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
595 * enqueued server lock conflicts with given one.
597 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
598 * to wait for client response.
600 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
601 struct ldlm_lock_desc *desc,
602 void *data, int flag)
604 struct ldlm_cb_set_arg *arg = data;
605 struct ldlm_request *body;
606 struct ptlrpc_request *req;
607 int instant_cancel = 0;
611 if (flag == LDLM_CB_CANCELING)
612 /* Don't need to do anything here. */
616 LASSERT(data != NULL);
617 if (lock->l_export->exp_obd->obd_recovering != 0) {
618 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
619 ldlm_lock_dump(D_ERROR, lock, 0);
622 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
623 &RQF_LDLM_BL_CALLBACK,
624 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
628 req->rq_async_args.pointer_arg[0] = arg;
629 req->rq_async_args.pointer_arg[1] = lock;
630 req->rq_interpret_reply = ldlm_cb_interpret;
631 req->rq_no_resend = 1;
633 lock_res(lock->l_resource);
634 if (lock->l_granted_mode != lock->l_req_mode) {
635 /* this blocking AST will be communicated as part of the
636 * completion AST instead */
637 unlock_res(lock->l_resource);
638 ptlrpc_req_finished(req);
639 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
643 if (lock->l_destroyed) {
644 /* What's the point? */
645 unlock_res(lock->l_resource);
646 ptlrpc_req_finished(req);
650 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
653 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
654 body->lock_handle[0] = lock->l_remote_handle;
655 body->lock_desc = *desc;
656 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
658 LDLM_DEBUG(lock, "server preparing blocking AST");
660 ptlrpc_request_set_replen(req);
661 if (instant_cancel) {
662 unlock_res(lock->l_resource);
663 ldlm_lock_cancel(lock);
665 LASSERT(lock->l_granted_mode == lock->l_req_mode);
666 ldlm_add_waiting_lock(lock);
667 unlock_res(lock->l_resource);
670 req->rq_send_state = LUSTRE_IMP_FULL;
671 /* ptlrpc_prep_req already set timeout */
673 req->rq_timeout = ldlm_get_rq_timeout();
675 if (lock->l_export && lock->l_export->exp_ldlm_stats)
676 lprocfs_counter_incr(lock->l_export->exp_ldlm_stats,
677 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
679 rc = ldlm_bl_and_cp_ast_fini(req, arg, lock, instant_cancel);
684 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
686 struct ldlm_cb_set_arg *arg = data;
687 struct ldlm_request *body;
688 struct ptlrpc_request *req;
689 struct timeval granted_time;
690 long total_enqueue_wait;
691 int instant_cancel = 0;
695 LASSERT(lock != NULL);
696 LASSERT(data != NULL);
698 do_gettimeofday(&granted_time);
699 total_enqueue_wait = cfs_timeval_sub(&granted_time,
700 &lock->l_enqueued_time, NULL);
702 if (total_enqueue_wait / ONE_MILLION > obd_timeout)
703 /* non-fatal with AT - change to LDLM_DEBUG? */
704 LDLM_ERROR(lock, "enqueue wait took %luus from "CFS_TIME_T,
705 total_enqueue_wait, lock->l_enqueued_time.tv_sec);
707 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
708 &RQF_LDLM_CP_CALLBACK);
712 lock_res_and_lock(lock);
713 if (lock->l_resource->lr_lvb_len)
714 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
715 lock->l_resource->lr_lvb_len);
716 unlock_res_and_lock(lock);
718 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
720 ptlrpc_request_free(req);
724 req->rq_async_args.pointer_arg[0] = arg;
725 req->rq_async_args.pointer_arg[1] = lock;
726 req->rq_interpret_reply = ldlm_cb_interpret;
727 req->rq_no_resend = 1;
728 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
730 body->lock_handle[0] = lock->l_remote_handle;
731 body->lock_flags = flags;
732 ldlm_lock2desc(lock, &body->lock_desc);
733 if (lock->l_resource->lr_lvb_len) {
734 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
736 lock_res_and_lock(lock);
737 memcpy(lvb, lock->l_resource->lr_lvb_data,
738 lock->l_resource->lr_lvb_len);
739 unlock_res_and_lock(lock);
742 LDLM_DEBUG(lock, "server preparing completion AST (after %ldus wait)",
745 /* Server-side enqueue wait time estimate, used in
746 __ldlm_add_waiting_lock to set future enqueue timers */
747 at_add(&lock->l_resource->lr_namespace->ns_at_estimate,
748 total_enqueue_wait / ONE_MILLION);
750 ptlrpc_request_set_replen(req);
752 req->rq_send_state = LUSTRE_IMP_FULL;
753 /* ptlrpc_prep_req already set timeout */
755 req->rq_timeout = ldlm_get_rq_timeout();
757 /* We only send real blocking ASTs after the lock is granted */
758 lock_res_and_lock(lock);
759 if (lock->l_flags & LDLM_FL_AST_SENT) {
760 body->lock_flags |= LDLM_FL_AST_SENT;
762 /* We might get here prior to ldlm_handle_enqueue setting
763 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
764 * into waiting list, but this is safe and similar code in
765 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
766 * that would not only cancel the lock, but will also remove
767 * it from waiting list */
768 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
769 unlock_res_and_lock(lock);
770 ldlm_lock_cancel(lock);
772 lock_res_and_lock(lock);
774 /* start the lock-timeout clock */
775 ldlm_add_waiting_lock(lock);
778 unlock_res_and_lock(lock);
780 if (lock->l_export && lock->l_export->exp_ldlm_stats)
781 lprocfs_counter_incr(lock->l_export->exp_ldlm_stats,
782 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
784 rc = ldlm_bl_and_cp_ast_fini(req, arg, lock, instant_cancel);
789 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
791 struct ldlm_resource *res = lock->l_resource;
792 struct ldlm_request *body;
793 struct ptlrpc_request *req;
797 LASSERT(lock != NULL);
799 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
800 &RQF_LDLM_GL_CALLBACK,
801 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
806 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
807 body->lock_handle[0] = lock->l_remote_handle;
808 ldlm_lock2desc(lock, &body->lock_desc);
810 lock_res_and_lock(lock);
811 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
812 lock->l_resource->lr_lvb_len);
813 unlock_res_and_lock(lock);
814 res = lock->l_resource;
815 ptlrpc_request_set_replen(req);
818 req->rq_send_state = LUSTRE_IMP_FULL;
819 /* ptlrpc_prep_req already set timeout */
821 req->rq_timeout = ldlm_get_rq_timeout();
823 if (lock->l_export && lock->l_export->exp_ldlm_stats)
824 lprocfs_counter_incr(lock->l_export->exp_ldlm_stats,
825 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
827 rc = ptlrpc_queue_wait(req);
828 if (rc == -ELDLM_NO_LOCK_DATA)
829 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
831 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
833 rc = ldlm_res_lvbo_update(res, req->rq_repmsg,
835 ptlrpc_req_finished(req);
837 ldlm_reprocess_all(res);
842 static struct ldlm_lock *
843 find_existing_lock(struct obd_export *exp,
844 const struct lustre_handle *remote_hdl)
846 struct list_head *iter;
848 spin_lock(&exp->exp_ldlm_data.led_lock);
849 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
850 struct ldlm_lock *lock;
851 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
852 if (lock->l_remote_handle.cookie == remote_hdl->cookie) {
854 spin_unlock(&exp->exp_ldlm_data.led_lock);
858 spin_unlock(&exp->exp_ldlm_data.led_lock);
863 extern unsigned long long lu_time_stamp_get(void);
865 #define lu_time_stamp_get() time(NULL)
868 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
869 struct lprocfs_stats *srv_stats)
871 int lock_type = 0, op = 0;
873 lock_type = dlm_req->lock_desc.l_resource.lr_type;
877 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
880 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
881 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
883 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
886 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
889 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
897 lprocfs_counter_incr(srv_stats, op);
903 * Main server-side entry point into LDLM. This is called by ptlrpc service
904 * threads to carry out client lock enqueueing requests.
906 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
907 struct ptlrpc_request *req,
908 const struct ldlm_request *dlm_req,
909 const struct ldlm_callback_suite *cbs)
911 struct ldlm_reply *dlm_rep;
913 ldlm_error_t err = ELDLM_OK;
914 struct ldlm_lock *lock = NULL;
919 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
921 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
922 flags = dlm_req->lock_flags;
924 LASSERT(req->rq_export);
926 if (req->rq_rqbd->rqbd_service->srv_stats)
927 ldlm_svc_get_eopc(dlm_req,
928 req->rq_rqbd->rqbd_service->srv_stats);
930 if (req->rq_export->exp_ldlm_stats)
931 lprocfs_counter_incr(req->rq_export->exp_ldlm_stats,
932 LDLM_ENQUEUE - LDLM_FIRST_OPC);
934 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
935 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
936 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
937 dlm_req->lock_desc.l_resource.lr_type);
938 GOTO(out, rc = -EFAULT);
941 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
942 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
943 dlm_req->lock_desc.l_req_mode &
944 (dlm_req->lock_desc.l_req_mode-1))) {
945 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
946 dlm_req->lock_desc.l_req_mode);
947 GOTO(out, rc = -EFAULT);
950 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
951 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
953 DEBUG_REQ(D_ERROR, req,
954 "PLAIN lock request from IBITS client?");
955 GOTO(out, rc = -EPROTO);
957 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
959 DEBUG_REQ(D_ERROR, req,
960 "IBITS lock request from unaware client?");
961 GOTO(out, rc = -EPROTO);
965 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
966 against server's _CONNECT_SUPPORTED flags? (I don't want to use
967 ibits for mgc/mgs) */
969 /* INODEBITS_INTEROP: Perform conversion from plain lock to
970 * inodebits lock if client does not support them. */
971 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
972 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
973 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
974 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
975 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
976 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
977 dlm_req->lock_desc.l_req_mode = LCK_CR;
981 if (unlikely(flags & LDLM_FL_REPLAY)) {
982 lock = find_existing_lock(req->rq_export,
983 &dlm_req->lock_handle[0]);
985 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
986 LPX64, lock->l_handle.h_cookie);
987 GOTO(existing_lock, rc = 0);
991 /* The lock's callback data might be set in the policy function */
992 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
993 dlm_req->lock_desc.l_resource.lr_type,
994 dlm_req->lock_desc.l_req_mode,
995 cbs->lcs_blocking, cbs->lcs_completion,
996 cbs->lcs_glimpse, NULL, 0);
999 GOTO(out, rc = -ENOMEM);
1001 do_gettimeofday(&lock->l_enqueued_time);
1002 lock->l_remote_handle = dlm_req->lock_handle[0];
1003 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1005 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1006 /* Don't enqueue a lock onto the export if it has already
1007 * been evicted. Cancel it now instead. (bug 3822) */
1008 if (req->rq_export->exp_failed) {
1009 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1010 GOTO(out, rc = -ENOTCONN);
1012 lock->l_export = class_export_get(req->rq_export);
1013 spin_lock(&lock->l_export->exp_ldlm_data.led_lock);
1014 list_add(&lock->l_export_chain,
1015 &lock->l_export->exp_ldlm_data.led_held_locks);
1016 spin_unlock(&lock->l_export->exp_ldlm_data.led_lock);
1020 if (flags & LDLM_FL_HAS_INTENT) {
1021 /* In this case, the reply buffer is allocated deep in
1022 * local_lock_enqueue by the policy function. */
1025 lock_res_and_lock(lock);
1026 if (lock->l_resource->lr_lvb_len) {
1027 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1029 lock->l_resource->lr_lvb_len);
1031 unlock_res_and_lock(lock);
1033 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1034 GOTO(out, rc = -ENOMEM);
1036 rc = req_capsule_server_pack(&req->rq_pill);
1041 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1042 lock->l_policy_data = dlm_req->lock_desc.l_policy_data;
1043 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1044 lock->l_req_extent = lock->l_policy_data.l_extent;
1046 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1050 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1051 dlm_rep->lock_flags = flags;
1053 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1054 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1056 /* We never send a blocking AST until the lock is granted, but
1057 * we can tell it right now */
1058 lock_res_and_lock(lock);
1060 /* Now take into account flags to be inherited from original lock
1061 request both in reply to client and in our own lock flags. */
1062 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1063 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1065 /* Don't move a pending lock onto the export if it has already
1066 * been evicted. Cancel it now instead. (bug 5683) */
1067 if (unlikely(req->rq_export->exp_failed ||
1068 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1069 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1071 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1072 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1073 if (lock->l_granted_mode == lock->l_req_mode) {
1075 * Only cancel lock if it was granted, because it would
1076 * be destroyed immediatelly and would never be granted
1077 * in the future, causing timeouts on client. Not
1078 * granted lock will be cancelled immediatelly after
1079 * sending completion AST.
1081 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1082 unlock_res_and_lock(lock);
1083 ldlm_lock_cancel(lock);
1084 lock_res_and_lock(lock);
1086 ldlm_add_waiting_lock(lock);
1089 /* Make sure we never ever grant usual metadata locks to liblustre
1091 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1092 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1093 req->rq_export->exp_libclient) {
1094 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1095 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1096 CERROR("Granting sync lock to libclient. "
1097 "req fl %d, rep fl %d, lock fl %d\n",
1098 dlm_req->lock_flags, dlm_rep->lock_flags,
1100 LDLM_ERROR(lock, "sync lock");
1101 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1102 struct ldlm_intent *it;
1104 it = req_capsule_client_get(&req->rq_pill,
1107 CERROR("This is intent %s ("LPU64")\n",
1108 ldlm_it2str(it->opc), it->opc);
1114 unlock_res_and_lock(lock);
1118 req->rq_status = err;
1119 if (!req->rq_packed_final) {
1120 err = lustre_pack_reply(req, 1, NULL, NULL);
1123 req->rq_status = rc;
1126 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1127 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1129 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1130 "(err=%d, rc=%d)", err, rc);
1132 lock_res_and_lock(lock);
1134 if (lock->l_resource->lr_lvb_len > 0) {
1137 lvb = req_capsule_server_get(&req->rq_pill,
1139 LASSERTF(lvb != NULL, "req %p, lock %p\n",
1142 memcpy(lvb, lock->l_resource->lr_lvb_data,
1143 lock->l_resource->lr_lvb_len);
1146 ldlm_resource_unlink_lock(lock);
1147 ldlm_lock_destroy_nolock(lock);
1149 unlock_res_and_lock(lock);
1151 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1152 ldlm_reprocess_all(lock->l_resource);
1154 LDLM_LOCK_PUT(lock);
1157 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1163 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1164 ldlm_completion_callback completion_callback,
1165 ldlm_blocking_callback blocking_callback,
1166 ldlm_glimpse_callback glimpse_callback)
1168 struct ldlm_request *dlm_req;
1169 struct ldlm_callback_suite cbs = {
1170 .lcs_completion = completion_callback,
1171 .lcs_blocking = blocking_callback,
1172 .lcs_glimpse = glimpse_callback
1176 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1177 if (dlm_req != NULL) {
1178 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1179 req, dlm_req, &cbs);
1186 int ldlm_handle_convert0(struct ptlrpc_request *req,
1187 const struct ldlm_request *dlm_req)
1189 struct ldlm_reply *dlm_rep;
1190 struct ldlm_lock *lock;
1194 if (req->rq_export && req->rq_export->exp_ldlm_stats)
1195 lprocfs_counter_incr(req->rq_export->exp_ldlm_stats,
1196 LDLM_CONVERT - LDLM_FIRST_OPC);
1198 rc = req_capsule_server_pack(&req->rq_pill);
1202 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1203 dlm_rep->lock_flags = dlm_req->lock_flags;
1205 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1207 req->rq_status = EINVAL;
1211 LDLM_DEBUG(lock, "server-side convert handler START");
1213 do_gettimeofday(&lock->l_enqueued_time);
1214 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1215 &dlm_rep->lock_flags);
1217 if (ldlm_del_waiting_lock(lock))
1218 LDLM_DEBUG(lock, "converted waiting lock");
1221 req->rq_status = EDEADLOCK;
1226 if (!req->rq_status)
1227 ldlm_reprocess_all(lock->l_resource);
1228 LDLM_DEBUG(lock, "server-side convert handler END");
1229 LDLM_LOCK_PUT(lock);
1231 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1236 int ldlm_handle_convert(struct ptlrpc_request *req)
1239 struct ldlm_request *dlm_req;
1241 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1242 if (dlm_req != NULL) {
1243 rc = ldlm_handle_convert0(req, dlm_req);
1245 CERROR ("Can't unpack dlm_req\n");
1251 /* Cancel all the locks whos handles are packed into ldlm_request */
1252 int ldlm_request_cancel(struct ptlrpc_request *req,
1253 const struct ldlm_request *dlm_req, int first)
1255 struct ldlm_resource *res, *pres = NULL;
1256 struct ldlm_lock *lock;
1257 int i, count, done = 0;
1260 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1264 /* There is no lock on the server at the replay time,
1265 * skip lock cancelling to make replay tests to pass. */
1266 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1269 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1270 "starting at %d", count, first);
1272 for (i = first; i < count; i++) {
1273 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1275 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1276 "lock (cookie "LPU64")",
1277 dlm_req->lock_handle[i].cookie);
1281 res = lock->l_resource;
1286 ldlm_reprocess_all(pres);
1287 ldlm_resource_putref(pres);
1290 ldlm_resource_getref(res);
1291 ldlm_res_lvbo_update(res, NULL, 0, 1);
1295 ldlm_lock_cancel(lock);
1296 LDLM_LOCK_PUT(lock);
1299 ldlm_reprocess_all(pres);
1300 ldlm_resource_putref(pres);
1302 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1306 int ldlm_handle_cancel(struct ptlrpc_request *req)
1308 struct ldlm_request *dlm_req;
1312 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1313 if (dlm_req == NULL) {
1314 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1318 if (req->rq_export && req->rq_export->exp_ldlm_stats)
1319 lprocfs_counter_incr(req->rq_export->exp_ldlm_stats,
1320 LDLM_CANCEL - LDLM_FIRST_OPC);
1322 rc = req_capsule_server_pack(&req->rq_pill);
1326 if (!ldlm_request_cancel(req, dlm_req, 0))
1327 req->rq_status = ESTALE;
1329 if (ptlrpc_reply(req) != 0)
1335 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1336 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1341 LDLM_DEBUG(lock, "client blocking AST callback handler START");
1343 lock_res_and_lock(lock);
1344 lock->l_flags |= LDLM_FL_CBPENDING;
1346 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1347 lock->l_flags |= LDLM_FL_CANCEL;
1349 do_ast = (!lock->l_readers && !lock->l_writers);
1350 unlock_res_and_lock(lock);
1353 LDLM_DEBUG(lock, "already unused, calling "
1354 "callback (%p)", lock->l_blocking_ast);
1355 if (lock->l_blocking_ast != NULL)
1356 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1359 LDLM_DEBUG(lock, "Lock still has references, will be"
1360 " cancelled later");
1363 LDLM_DEBUG(lock, "client blocking callback handler END");
1364 LDLM_LOCK_PUT(lock);
1368 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1369 struct ldlm_namespace *ns,
1370 struct ldlm_request *dlm_req,
1371 struct ldlm_lock *lock)
1373 CFS_LIST_HEAD(ast_list);
1376 LDLM_DEBUG(lock, "client completion callback handler START");
1378 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1379 int to = cfs_time_seconds(1);
1381 cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE, to);
1382 if (lock->l_granted_mode == lock->l_req_mode ||
1388 lock_res_and_lock(lock);
1389 if (lock->l_destroyed ||
1390 lock->l_granted_mode == lock->l_req_mode) {
1391 /* bug 11300: the lock has already been granted */
1392 unlock_res_and_lock(lock);
1393 LDLM_DEBUG(lock, "Double grant race happened");
1394 LDLM_LOCK_PUT(lock);
1399 /* If we receive the completion AST before the actual enqueue returned,
1400 * then we might need to switch lock modes, resources, or extents. */
1401 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1402 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1403 LDLM_DEBUG(lock, "completion AST, new lock mode");
1406 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1407 lock->l_policy_data = dlm_req->lock_desc.l_policy_data;
1408 LDLM_DEBUG(lock, "completion AST, new policy data");
1411 ldlm_resource_unlink_lock(lock);
1412 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1413 &lock->l_resource->lr_name,
1414 sizeof(lock->l_resource->lr_name)) != 0) {
1415 unlock_res_and_lock(lock);
1416 if (ldlm_lock_change_resource(ns, lock,
1417 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1418 LDLM_ERROR(lock, "Failed to allocate resource");
1419 LDLM_LOCK_PUT(lock);
1423 LDLM_DEBUG(lock, "completion AST, new resource");
1424 CERROR("change resource!\n");
1425 lock_res_and_lock(lock);
1428 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1429 /* BL_AST locks are not needed in lru.
1430 * let ldlm_cancel_lru() be fast. */
1431 ldlm_lock_remove_from_lru(lock);
1432 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1433 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1436 if (lock->l_lvb_len) {
1437 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1438 RCL_CLIENT) < lock->l_lvb_len) {
1439 LDLM_ERROR(lock, "completion AST did not contain "
1442 void *lvb = req_capsule_client_swab_get(&req->rq_pill,
1444 (void *)lock->l_lvb_swabber);
1445 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1449 ldlm_grant_lock(lock, &ast_list);
1450 unlock_res_and_lock(lock);
1452 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1454 ldlm_run_ast_work(&ast_list, LDLM_WORK_CP_AST);
1456 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1458 LDLM_LOCK_PUT(lock);
1462 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1463 struct ldlm_namespace *ns,
1464 struct ldlm_request *dlm_req,
1465 struct ldlm_lock *lock)
1470 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1472 if (lock->l_glimpse_ast != NULL)
1473 rc = lock->l_glimpse_ast(lock, req);
1475 if (req->rq_repmsg != NULL) {
1478 req->rq_status = rc;
1482 lock_res_and_lock(lock);
1483 if (lock->l_granted_mode == LCK_PW &&
1484 !lock->l_readers && !lock->l_writers &&
1485 cfs_time_after(cfs_time_current(),
1486 cfs_time_add(lock->l_last_used,
1487 cfs_time_seconds(10)))) {
1488 unlock_res_and_lock(lock);
1489 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1490 ldlm_handle_bl_callback(ns, NULL, lock);
1495 unlock_res_and_lock(lock);
1496 LDLM_LOCK_PUT(lock);
1500 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1502 if (req->rq_no_reply)
1505 req->rq_status = rc;
1506 if (!req->rq_packed_final) {
1507 rc = lustre_pack_reply(req, 1, NULL, NULL);
1511 return ptlrpc_reply(req);
1515 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1516 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1517 struct list_head *cancels, int count)
1519 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1520 struct ldlm_bl_work_item *blwi;
1523 if (cancels && count == 0)
1526 OBD_ALLOC(blwi, sizeof(*blwi));
1532 blwi->blwi_ld = *ld;
1534 list_add(&blwi->blwi_head, cancels);
1535 list_del_init(cancels);
1536 blwi->blwi_count = count;
1538 blwi->blwi_lock = lock;
1540 spin_lock(&blp->blp_lock);
1541 if (lock && lock->l_flags & LDLM_FL_DISCARD_DATA) {
1542 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1543 list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1545 /* other blocking callbacks are added to the regular list */
1546 list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1548 cfs_waitq_signal(&blp->blp_waitq);
1549 spin_unlock(&blp->blp_lock);
1555 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1556 struct ldlm_lock *lock)
1559 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0));
1565 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1566 struct list_head *cancels, int count)
1569 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count));
1575 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1576 static int ldlm_callback_handler(struct ptlrpc_request *req)
1578 struct ldlm_namespace *ns;
1579 struct ldlm_request *dlm_req;
1580 struct ldlm_lock *lock;
1584 /* Requests arrive in sender's byte order. The ptlrpc service
1585 * handler has already checked and, if necessary, byte-swapped the
1586 * incoming request message body, but I am responsible for the
1587 * message buffers. */
1589 /* do nothing for sec context finalize */
1590 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1593 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1595 if (req->rq_export == NULL) {
1596 struct ldlm_request *dlm_req;
1598 CDEBUG(D_RPCTRACE, "operation %d from %s with bad "
1599 "export cookie "LPX64"; this is "
1600 "normal if this node rebooted with a lock held\n",
1601 lustre_msg_get_opc(req->rq_reqmsg),
1602 libcfs_id2str(req->rq_peer),
1603 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
1605 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1606 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1607 if (dlm_req != NULL)
1608 CDEBUG(D_RPCTRACE, "--> lock cookie: "LPX64"\n",
1609 dlm_req->lock_handle[0].cookie);
1611 ldlm_callback_reply(req, -ENOTCONN);
1615 LASSERT(req->rq_export != NULL);
1616 LASSERT(req->rq_export->exp_obd != NULL);
1618 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1619 case LDLM_BL_CALLBACK:
1620 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1623 case LDLM_CP_CALLBACK:
1624 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1627 case LDLM_GL_CALLBACK:
1628 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1631 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1632 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1633 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1635 rc = llog_origin_handle_cancel(req);
1636 ldlm_callback_reply(req, rc);
1638 case OBD_QC_CALLBACK:
1639 req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
1640 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
1642 rc = target_handle_qc_callback(req);
1643 ldlm_callback_reply(req, rc);
1647 /* reply in handler */
1648 req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
1649 rc = target_handle_dqacq_callback(req);
1651 case LLOG_ORIGIN_HANDLE_CREATE:
1652 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1653 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1655 rc = llog_origin_handle_create(req);
1656 ldlm_callback_reply(req, rc);
1658 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1659 req_capsule_set(&req->rq_pill,
1660 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1661 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1663 rc = llog_origin_handle_next_block(req);
1664 ldlm_callback_reply(req, rc);
1666 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1667 req_capsule_set(&req->rq_pill,
1668 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1669 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1671 rc = llog_origin_handle_read_header(req);
1672 ldlm_callback_reply(req, rc);
1674 case LLOG_ORIGIN_HANDLE_CLOSE:
1675 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1677 rc = llog_origin_handle_close(req);
1678 ldlm_callback_reply(req, rc);
1681 CERROR("unknown opcode %u\n",
1682 lustre_msg_get_opc(req->rq_reqmsg));
1683 ldlm_callback_reply(req, -EPROTO);
1687 ns = req->rq_export->exp_obd->obd_namespace;
1688 LASSERT(ns != NULL);
1690 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1692 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1693 if (dlm_req == NULL) {
1694 ldlm_callback_reply(req, -EPROTO);
1698 /* Force a known safe race, send a cancel to the server for a lock
1699 * which the server has already started a blocking callback on. */
1700 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
1701 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1702 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
1704 CERROR("ldlm_cli_cancel: %d\n", rc);
1707 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle[0]);
1709 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
1710 "disappeared\n", dlm_req->lock_handle[0].cookie);
1711 ldlm_callback_reply(req, -EINVAL);
1715 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1716 lock_res_and_lock(lock);
1717 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1718 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1719 /* If somebody cancels locks and cache is already droped,
1720 * we can tell the server we have no lock. Otherwise, we
1721 * should send cancel after dropping the cache. */
1722 if ((lock->l_flags & LDLM_FL_CANCELING) &&
1723 (lock->l_flags & LDLM_FL_BL_DONE)) {
1724 LDLM_DEBUG(lock, "callback on lock "
1725 LPX64" - lock disappeared\n",
1726 dlm_req->lock_handle[0].cookie);
1727 unlock_res_and_lock(lock);
1728 LDLM_LOCK_PUT(lock);
1729 ldlm_callback_reply(req, -EINVAL);
1732 /* BL_AST locks are not needed in lru.
1733 * let ldlm_cancel_lru() be fast. */
1734 ldlm_lock_remove_from_lru(lock);
1735 lock->l_flags |= LDLM_FL_BL_AST;
1737 unlock_res_and_lock(lock);
1739 /* We want the ost thread to get this reply so that it can respond
1740 * to ost requests (write cache writeback) that might be triggered
1743 * But we'd also like to be able to indicate in the reply that we're
1744 * cancelling right now, because it's unused, or have an intent result
1745 * in the reply, so we might have to push the responsibility for sending
1746 * the reply down into the AST handlers, alas. */
1748 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1749 case LDLM_BL_CALLBACK:
1750 CDEBUG(D_INODE, "blocking ast\n");
1751 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
1752 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK))
1753 ldlm_callback_reply(req, 0);
1754 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
1755 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
1757 case LDLM_CP_CALLBACK:
1758 CDEBUG(D_INODE, "completion ast\n");
1759 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
1760 ldlm_callback_reply(req, 0);
1761 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
1763 case LDLM_GL_CALLBACK:
1764 CDEBUG(D_INODE, "glimpse ast\n");
1765 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
1766 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
1769 LBUG(); /* checked above */
1775 static int ldlm_cancel_handler(struct ptlrpc_request *req)
1780 /* Requests arrive in sender's byte order. The ptlrpc service
1781 * handler has already checked and, if necessary, byte-swapped the
1782 * incoming request message body, but I am responsible for the
1783 * message buffers. */
1785 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1787 if (req->rq_export == NULL) {
1788 struct ldlm_request *dlm_req;
1790 CERROR("operation %d from %s with bad export cookie "LPU64"\n",
1791 lustre_msg_get_opc(req->rq_reqmsg),
1792 libcfs_id2str(req->rq_peer),
1793 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
1795 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1796 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1797 if (dlm_req != NULL)
1798 ldlm_lock_dump_handle(D_ERROR,
1799 &dlm_req->lock_handle[0]);
1800 ldlm_callback_reply(req, -ENOTCONN);
1804 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1806 /* XXX FIXME move this back to mds/handler.c, bug 249 */
1808 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
1809 CDEBUG(D_INODE, "cancel\n");
1810 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
1812 rc = ldlm_handle_cancel(req);
1816 case OBD_LOG_CANCEL:
1817 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1818 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1820 rc = llog_origin_handle_cancel(req);
1821 ldlm_callback_reply(req, rc);
1824 CERROR("invalid opcode %d\n",
1825 lustre_msg_get_opc(req->rq_reqmsg));
1826 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1827 ldlm_callback_reply(req, -EINVAL);
1833 void ldlm_revoke_export_locks(struct obd_export *exp)
1835 struct list_head *locklist = &exp->exp_ldlm_data.led_held_locks;
1836 struct list_head rpc_list;
1837 struct ldlm_lock *lock, *next;
1840 CFS_INIT_LIST_HEAD(&rpc_list);
1842 spin_lock(&exp->exp_ldlm_data.led_lock);
1843 list_for_each_entry_safe(lock, next, locklist, l_export_chain) {
1844 lock_res_and_lock(lock);
1846 if (lock->l_req_mode != lock->l_granted_mode) {
1847 unlock_res_and_lock(lock);
1851 LASSERT(lock->l_resource);
1852 if (lock->l_resource->lr_type != LDLM_IBITS &&
1853 lock->l_resource->lr_type != LDLM_PLAIN) {
1854 unlock_res_and_lock(lock);
1858 if (lock->l_flags & LDLM_FL_AST_SENT) {
1859 unlock_res_and_lock(lock);
1863 LASSERT(lock->l_blocking_ast);
1864 LASSERT(!lock->l_blocking_lock);
1866 lock->l_flags |= LDLM_FL_AST_SENT;
1867 list_move(&lock->l_export_chain, &rpc_list);
1868 LDLM_LOCK_GET(lock);
1870 unlock_res_and_lock(lock);
1872 spin_unlock(&exp->exp_ldlm_data.led_lock);
1874 ldlm_run_ast_work(&rpc_list, LDLM_WORK_REVOKE_AST);
1880 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
1882 struct ldlm_bl_work_item *blwi = NULL;
1883 static unsigned int num_bl = 0;
1885 spin_lock(&blp->blp_lock);
1886 /* process a request from the blp_list at least every blp_num_threads */
1887 if (!list_empty(&blp->blp_list) &&
1888 (list_empty(&blp->blp_prio_list) || num_bl == 0))
1889 blwi = list_entry(blp->blp_list.next,
1890 struct ldlm_bl_work_item, blwi_entry);
1892 if (!list_empty(&blp->blp_prio_list))
1893 blwi = list_entry(blp->blp_prio_list.next,
1894 struct ldlm_bl_work_item, blwi_entry);
1897 if (++num_bl >= atomic_read(&blp->blp_num_threads))
1899 list_del(&blwi->blwi_entry);
1901 spin_unlock(&blp->blp_lock);
1906 /* This only contains temporary data until the thread starts */
1907 struct ldlm_bl_thread_data {
1908 char bltd_name[CFS_CURPROC_COMM_MAX];
1909 struct ldlm_bl_pool *bltd_blp;
1910 struct completion bltd_comp;
1914 static int ldlm_bl_thread_main(void *arg);
1916 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
1918 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
1921 init_completion(&bltd.bltd_comp);
1922 rc = cfs_kernel_thread(ldlm_bl_thread_main, &bltd, 0);
1924 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
1925 atomic_read(&blp->blp_num_threads), rc);
1928 wait_for_completion(&bltd.bltd_comp);
1933 static int ldlm_bl_thread_main(void *arg)
1935 struct ldlm_bl_pool *blp;
1939 struct ldlm_bl_thread_data *bltd = arg;
1941 blp = bltd->bltd_blp;
1943 bltd->bltd_num = atomic_inc_return(&blp->blp_num_threads) - 1;
1944 atomic_inc(&blp->blp_busy_threads);
1946 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
1947 "ldlm_bl_%02d", bltd->bltd_num);
1948 cfs_daemonize(bltd->bltd_name);
1950 complete(&bltd->bltd_comp);
1951 /* cannot use bltd after this, it is only on caller's stack */
1955 struct l_wait_info lwi = { 0 };
1956 struct ldlm_bl_work_item *blwi = NULL;
1958 blwi = ldlm_bl_get_work(blp);
1963 atomic_dec(&blp->blp_busy_threads);
1964 l_wait_event_exclusive(blp->blp_waitq,
1965 (blwi = ldlm_bl_get_work(blp)) != NULL,
1967 busy = atomic_inc_return(&blp->blp_busy_threads);
1969 if (blwi->blwi_ns == NULL)
1970 /* added by ldlm_cleanup() */
1973 /* Not fatal if racy and have a few too many threads */
1974 if (unlikely(busy < blp->blp_max_threads &&
1975 busy >= atomic_read(&blp->blp_num_threads)))
1976 /* discard the return value, we tried */
1977 ldlm_bl_thread_start(blp);
1979 if (blwi->blwi_ns == NULL)
1980 /* added by ldlm_cleanup() */
1984 if (blwi->blwi_count) {
1985 /* The special case when we cancel locks in lru
1986 * asynchronously, we pass the list of locks here.
1987 * Thus lock is marked LDLM_FL_CANCELING, and already
1988 * canceled locally. */
1989 ldlm_cli_cancel_list(&blwi->blwi_head,
1990 blwi->blwi_count, NULL, 0);
1992 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
1995 OBD_FREE(blwi, sizeof(*blwi));
1998 atomic_dec(&blp->blp_busy_threads);
1999 atomic_dec(&blp->blp_num_threads);
2000 complete(&blp->blp_comp);
2006 static int ldlm_setup(void);
2007 static int ldlm_cleanup(void);
2009 int ldlm_get_ref(void)
2013 mutex_down(&ldlm_ref_sem);
2014 if (++ldlm_refcount == 1) {
2019 mutex_up(&ldlm_ref_sem);
2024 void ldlm_put_ref(void)
2027 mutex_down(&ldlm_ref_sem);
2028 if (ldlm_refcount == 1) {
2029 int rc = ldlm_cleanup();
2031 CERROR("ldlm_cleanup failed: %d\n", rc);
2037 mutex_up(&ldlm_ref_sem);
2042 static int ldlm_setup(void)
2044 struct ldlm_bl_pool *blp;
2046 int ldlm_min_threads = LDLM_THREADS_AUTO_MIN;
2047 int ldlm_max_threads = LDLM_THREADS_AUTO_MAX;
2053 if (ldlm_state != NULL)
2056 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2057 if (ldlm_state == NULL)
2061 rc = ldlm_proc_setup();
2067 if (ldlm_num_threads) {
2068 /* If ldlm_num_threads is set, it is the min and the max. */
2069 if (ldlm_num_threads > LDLM_THREADS_AUTO_MAX)
2070 ldlm_num_threads = LDLM_THREADS_AUTO_MAX;
2071 if (ldlm_num_threads < LDLM_THREADS_AUTO_MIN)
2072 ldlm_num_threads = LDLM_THREADS_AUTO_MIN;
2073 ldlm_min_threads = ldlm_max_threads = ldlm_num_threads;
2077 ldlm_state->ldlm_cb_service =
2078 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2079 LDLM_MAXREPSIZE, LDLM_CB_REQUEST_PORTAL,
2080 LDLM_CB_REPLY_PORTAL, 1800,
2081 ldlm_callback_handler, "ldlm_cbd",
2082 ldlm_svc_proc_dir, NULL,
2083 ldlm_min_threads, ldlm_max_threads,
2085 LCT_MD_THREAD|LCT_DT_THREAD);
2087 if (!ldlm_state->ldlm_cb_service) {
2088 CERROR("failed to start service\n");
2089 GOTO(out_proc, rc = -ENOMEM);
2092 ldlm_state->ldlm_cancel_service =
2093 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2094 LDLM_MAXREPSIZE, LDLM_CANCEL_REQUEST_PORTAL,
2095 LDLM_CANCEL_REPLY_PORTAL, 6000,
2096 ldlm_cancel_handler, "ldlm_canceld",
2097 ldlm_svc_proc_dir, NULL,
2098 ldlm_min_threads, ldlm_max_threads,
2100 LCT_MD_THREAD|LCT_DT_THREAD|LCT_CL_THREAD);
2102 if (!ldlm_state->ldlm_cancel_service) {
2103 CERROR("failed to start service\n");
2104 GOTO(out_proc, rc = -ENOMEM);
2107 OBD_ALLOC(blp, sizeof(*blp));
2109 GOTO(out_proc, rc = -ENOMEM);
2110 ldlm_state->ldlm_bl_pool = blp;
2112 spin_lock_init(&blp->blp_lock);
2113 CFS_INIT_LIST_HEAD(&blp->blp_list);
2114 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2115 cfs_waitq_init(&blp->blp_waitq);
2116 atomic_set(&blp->blp_num_threads, 0);
2117 atomic_set(&blp->blp_busy_threads, 0);
2118 blp->blp_min_threads = ldlm_min_threads;
2119 blp->blp_max_threads = ldlm_max_threads;
2122 for (i = 0; i < blp->blp_min_threads; i++) {
2123 rc = ldlm_bl_thread_start(blp);
2125 GOTO(out_thread, rc);
2128 rc = ptlrpc_start_threads(NULL, ldlm_state->ldlm_cancel_service);
2130 GOTO(out_thread, rc);
2132 rc = ptlrpc_start_threads(NULL, ldlm_state->ldlm_cb_service);
2134 GOTO(out_thread, rc);
2136 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2137 expired_lock_thread.elt_state = ELT_STOPPED;
2138 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2140 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2141 spin_lock_init(&waiting_locks_spinlock);
2142 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2144 rc = cfs_kernel_thread(expired_lock_main, NULL, CLONE_VM | CLONE_FILES);
2146 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2147 GOTO(out_thread, rc);
2150 wait_event(expired_lock_thread.elt_waitq,
2151 expired_lock_thread.elt_state == ELT_READY);
2155 rc = ldlm_pools_init();
2157 GOTO(out_thread, rc);
2163 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2164 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2169 ldlm_proc_cleanup();
2172 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2177 static int ldlm_cleanup(void)
2180 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2184 if (!list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2185 !list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2186 CERROR("ldlm still has namespaces; clean these up first.\n");
2187 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2188 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2197 while (atomic_read(&blp->blp_num_threads) > 0) {
2198 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2200 init_completion(&blp->blp_comp);
2202 spin_lock(&blp->blp_lock);
2203 list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2204 cfs_waitq_signal(&blp->blp_waitq);
2205 spin_unlock(&blp->blp_lock);
2207 wait_for_completion(&blp->blp_comp);
2209 OBD_FREE(blp, sizeof(*blp));
2211 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2212 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2213 ldlm_proc_cleanup();
2215 expired_lock_thread.elt_state = ELT_TERMINATE;
2216 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2217 wait_event(expired_lock_thread.elt_waitq,
2218 expired_lock_thread.elt_state == ELT_STOPPED);
2220 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2221 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2224 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2230 int __init ldlm_init(void)
2232 init_mutex(&ldlm_ref_sem);
2233 init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2234 init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2235 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2236 sizeof(struct ldlm_resource), 0,
2237 SLAB_HWCACHE_ALIGN);
2238 if (ldlm_resource_slab == NULL)
2241 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2242 sizeof(struct ldlm_lock), 0,
2243 SLAB_HWCACHE_ALIGN);
2244 if (ldlm_lock_slab == NULL) {
2245 cfs_mem_cache_destroy(ldlm_resource_slab);
2249 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2250 sizeof(struct ldlm_interval),
2251 0, SLAB_HWCACHE_ALIGN);
2252 if (ldlm_interval_slab == NULL) {
2253 cfs_mem_cache_destroy(ldlm_resource_slab);
2254 cfs_mem_cache_destroy(ldlm_lock_slab);
2261 void __exit ldlm_exit(void)
2265 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2266 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2267 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2268 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2269 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2270 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2271 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2275 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2278 EXPORT_SYMBOL(ldlm_get_processing_policy);
2279 EXPORT_SYMBOL(ldlm_lock2desc);
2280 EXPORT_SYMBOL(ldlm_register_intent);
2281 EXPORT_SYMBOL(ldlm_lockname);
2282 EXPORT_SYMBOL(ldlm_typename);
2283 EXPORT_SYMBOL(ldlm_lock2handle);
2284 EXPORT_SYMBOL(__ldlm_handle2lock);
2285 EXPORT_SYMBOL(ldlm_lock_get);
2286 EXPORT_SYMBOL(ldlm_lock_put);
2287 EXPORT_SYMBOL(ldlm_lock_fast_match);
2288 EXPORT_SYMBOL(ldlm_lock_fast_release);
2289 EXPORT_SYMBOL(ldlm_lock_match);
2290 EXPORT_SYMBOL(ldlm_lock_cancel);
2291 EXPORT_SYMBOL(ldlm_lock_addref);
2292 EXPORT_SYMBOL(ldlm_lock_decref);
2293 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2294 EXPORT_SYMBOL(ldlm_lock_change_resource);
2295 EXPORT_SYMBOL(ldlm_lock_set_data);
2296 EXPORT_SYMBOL(ldlm_it2str);
2297 EXPORT_SYMBOL(ldlm_lock_dump);
2298 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2299 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
2300 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2301 EXPORT_SYMBOL(ldlm_lock_allow_match);
2303 /* ldlm_request.c */
2304 EXPORT_SYMBOL(ldlm_completion_ast);
2305 EXPORT_SYMBOL(ldlm_blocking_ast);
2306 EXPORT_SYMBOL(ldlm_glimpse_ast);
2307 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2308 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2309 EXPORT_SYMBOL(ldlm_prep_elc_req);
2310 EXPORT_SYMBOL(ldlm_cli_convert);
2311 EXPORT_SYMBOL(ldlm_cli_enqueue);
2312 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2313 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2314 EXPORT_SYMBOL(ldlm_cli_cancel);
2315 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2316 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2317 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2318 EXPORT_SYMBOL(ldlm_cli_join_lru);
2319 EXPORT_SYMBOL(ldlm_replay_locks);
2320 EXPORT_SYMBOL(ldlm_resource_foreach);
2321 EXPORT_SYMBOL(ldlm_namespace_foreach);
2322 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
2323 EXPORT_SYMBOL(ldlm_resource_iterate);
2324 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2325 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2328 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2329 EXPORT_SYMBOL(ldlm_server_completion_ast);
2330 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2331 EXPORT_SYMBOL(ldlm_handle_enqueue);
2332 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2333 EXPORT_SYMBOL(ldlm_handle_cancel);
2334 EXPORT_SYMBOL(ldlm_request_cancel);
2335 EXPORT_SYMBOL(ldlm_handle_convert);
2336 EXPORT_SYMBOL(ldlm_handle_convert0);
2337 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2338 EXPORT_SYMBOL(ldlm_get_ref);
2339 EXPORT_SYMBOL(ldlm_put_ref);
2340 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2341 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2343 /* ldlm_resource.c */
2344 EXPORT_SYMBOL(ldlm_namespace_new);
2345 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2346 EXPORT_SYMBOL(ldlm_namespace_free);
2347 EXPORT_SYMBOL(ldlm_namespace_dump);
2348 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2349 EXPORT_SYMBOL(ldlm_resource_get);
2350 EXPORT_SYMBOL(ldlm_resource_putref);
2351 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2354 EXPORT_SYMBOL(client_import_add_conn);
2355 EXPORT_SYMBOL(client_import_del_conn);
2356 EXPORT_SYMBOL(client_obd_setup);
2357 EXPORT_SYMBOL(client_obd_cleanup);
2358 EXPORT_SYMBOL(client_connect_import);
2359 EXPORT_SYMBOL(client_disconnect_export);
2360 EXPORT_SYMBOL(target_start_recovery_thread);
2361 EXPORT_SYMBOL(target_stop_recovery_thread);
2362 EXPORT_SYMBOL(target_handle_connect);
2363 EXPORT_SYMBOL(target_cleanup_recovery);
2364 EXPORT_SYMBOL(target_destroy_export);
2365 EXPORT_SYMBOL(target_cancel_recovery_timer);
2366 EXPORT_SYMBOL(target_send_reply);
2367 EXPORT_SYMBOL(target_queue_recovery_request);
2368 EXPORT_SYMBOL(target_handle_ping);
2369 EXPORT_SYMBOL(target_pack_pool_reply);
2370 EXPORT_SYMBOL(target_handle_disconnect);
2373 EXPORT_SYMBOL(lock_res_and_lock);
2374 EXPORT_SYMBOL(unlock_res_and_lock);