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() */
208 LDLM_LOCK_RELEASE(lock);
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() */
216 LDLM_LOCK_RELEASE(lock);
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)
323 spin_unlock_bh(&waiting_locks_spinlock);
324 LDLM_DEBUG(lock, "prolong the busy lock");
325 ldlm_refresh_waiting_lock(lock,
326 ldlm_get_enq_timeout(lock));
327 spin_lock_bh(&waiting_locks_spinlock);
330 LDLM_LOCK_RELEASE(lock);
334 LDLM_LOCK_RELEASE(lock);
337 lock->l_resource->lr_namespace->ns_timeouts++;
338 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
339 "evicting client at %s ",
340 cfs_time_current_sec()- lock->l_last_activity,
342 lock->l_export->exp_connection->c_peer.nid));
346 /* no needs to take an extra ref on the lock since it was in
347 * the waiting_locks_list and ldlm_add_waiting_lock()
348 * already grabbed a ref */
349 list_del(&lock->l_pending_chain);
350 list_add(&lock->l_pending_chain,
351 &expired_lock_thread.elt_expired_locks);
354 if (!list_empty(&expired_lock_thread.elt_expired_locks)) {
355 if (obd_dump_on_timeout)
356 expired_lock_thread.elt_dump = __LINE__;
358 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
362 * Make sure the timer will fire again if we have any locks
365 if (!list_empty(&waiting_locks_list)) {
366 cfs_time_t timeout_rounded;
367 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
369 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
370 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
372 spin_unlock_bh(&waiting_locks_spinlock);
376 * Indicate that we're waiting for a client to call us back cancelling a given
377 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
378 * timer to fire appropriately. (We round up to the next second, to avoid
379 * floods of timer firings during periods of high lock contention and traffic).
380 * As done by ldlm_add_waiting_lock(), the caller must grab a lock reference
381 * if it has been added to the waiting list (1 is returned).
383 * Called with the namespace lock held.
385 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds)
388 cfs_time_t timeout_rounded;
390 if (!list_empty(&lock->l_pending_chain))
393 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
394 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
397 timeout = cfs_time_shift(seconds);
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)
417 int timeout = ldlm_get_enq_timeout(lock);
419 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
421 spin_lock_bh(&waiting_locks_spinlock);
422 if (lock->l_destroyed) {
423 static cfs_time_t next;
424 spin_unlock_bh(&waiting_locks_spinlock);
425 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
426 if (cfs_time_after(cfs_time_current(), next)) {
427 next = cfs_time_shift(14400);
428 libcfs_debug_dumpstack(NULL);
433 ret = __ldlm_add_waiting_lock(lock, timeout);
435 /* grab ref on the lock if it has been added to the
438 spin_unlock_bh(&waiting_locks_spinlock);
440 LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
441 ret == 0 ? "not re-" : "", timeout,
442 AT_OFF ? "off" : "on");
447 * Remove a lock from the pending list, likely because it had its cancellation
448 * callback arrive without incident. This adjusts the lock-timeout timer if
449 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
450 * As done by ldlm_del_waiting_lock(), the caller must release the lock
451 * reference when the lock is removed from any list (1 is returned).
453 * Called with namespace lock held.
455 static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
457 struct list_head *list_next;
459 if (list_empty(&lock->l_pending_chain))
462 list_next = lock->l_pending_chain.next;
463 if (lock->l_pending_chain.prev == &waiting_locks_list) {
464 /* Removing the head of the list, adjust timer. */
465 if (list_next == &waiting_locks_list) {
466 /* No more, just cancel. */
467 cfs_timer_disarm(&waiting_locks_timer);
469 struct ldlm_lock *next;
470 next = list_entry(list_next, struct ldlm_lock,
472 cfs_timer_arm(&waiting_locks_timer,
473 round_timeout(next->l_callback_timeout));
476 list_del_init(&lock->l_pending_chain);
481 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
485 if (lock->l_export == NULL) {
486 /* We don't have a "waiting locks list" on clients. */
487 LDLM_DEBUG(lock, "client lock: no-op");
491 spin_lock_bh(&waiting_locks_spinlock);
492 ret = __ldlm_del_waiting_lock(lock);
493 spin_unlock_bh(&waiting_locks_spinlock);
495 /* release lock ref if it has indeed been removed
497 LDLM_LOCK_RELEASE(lock);
499 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
506 * Called with namespace lock held.
508 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
510 if (lock->l_export == NULL) {
511 /* We don't have a "waiting locks list" on clients. */
512 LDLM_DEBUG(lock, "client lock: no-op");
516 spin_lock_bh(&waiting_locks_spinlock);
518 if (list_empty(&lock->l_pending_chain)) {
519 spin_unlock_bh(&waiting_locks_spinlock);
520 LDLM_DEBUG(lock, "wasn't waiting");
524 /* we remove/add the lock to the waiting list, so no needs to
525 * release/take a lock reference */
526 __ldlm_del_waiting_lock(lock);
527 __ldlm_add_waiting_lock(lock, timeout);
528 spin_unlock_bh(&waiting_locks_spinlock);
530 LDLM_DEBUG(lock, "refreshed");
533 #else /* !__KERNEL__ */
535 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
537 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
541 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
546 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
550 #endif /* __KERNEL__ */
552 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
553 const char *ast_type)
555 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
556 "to a lock %s callback time out: rc %d\n",
557 lock->l_export->exp_obd->obd_name,
558 obd_export_nid2str(lock->l_export), ast_type, rc);
560 if (obd_dump_on_timeout)
561 libcfs_debug_dumplog();
563 spin_lock_bh(&waiting_locks_spinlock);
564 if (__ldlm_del_waiting_lock(lock) == 0)
565 /* the lock was not in any list, grab an extra ref before adding
566 * the lock to the expired list */
568 list_add(&lock->l_pending_chain, &expired_lock_thread.elt_expired_locks);
569 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
570 spin_unlock_bh(&waiting_locks_spinlock);
572 class_fail_export(lock->l_export);
576 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
577 struct ptlrpc_request *req, int rc,
578 const char *ast_type)
580 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
582 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
583 LASSERT(lock->l_export);
584 if (lock->l_export->exp_libclient) {
585 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
586 " timeout, just cancelling lock", ast_type,
587 libcfs_nid2str(peer.nid));
588 ldlm_lock_cancel(lock);
590 } else if (lock->l_flags & LDLM_FL_CANCEL) {
591 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
592 "cancel was received (AST reply lost?)",
593 ast_type, libcfs_nid2str(peer.nid));
594 ldlm_lock_cancel(lock);
597 ldlm_del_waiting_lock(lock);
598 ldlm_failed_ast(lock, rc, ast_type);
602 LDLM_DEBUG(lock, "client (nid %s) returned %d"
603 " from %s AST - normal race",
604 libcfs_nid2str(peer.nid),
606 lustre_msg_get_status(req->rq_repmsg) : -1,
609 LDLM_ERROR(lock, "client (nid %s) returned %d "
610 "from %s AST", libcfs_nid2str(peer.nid),
611 (req->rq_repmsg != NULL) ?
612 lustre_msg_get_status(req->rq_repmsg) : 0,
614 ldlm_lock_cancel(lock);
615 /* Server-side AST functions are called from ldlm_reprocess_all,
616 * which needs to be told to please restart its reprocessing. */
623 static int ldlm_cb_interpret(const struct lu_env *env,
624 struct ptlrpc_request *req, void *data, int rc)
626 struct ldlm_cb_set_arg *arg;
627 struct ldlm_lock *lock;
630 LASSERT(data != NULL);
632 arg = req->rq_async_args.pointer_arg[0];
633 lock = req->rq_async_args.pointer_arg[1];
634 LASSERT(lock != NULL);
636 /* If client canceled the lock but the cancel has not
637 * been recieved yet, we need to update lvbo to have the
638 * proper attributes cached. */
639 if (rc == -EINVAL && arg->type == LDLM_BL_CALLBACK)
640 ldlm_res_lvbo_update(lock->l_resource, NULL,
642 rc = ldlm_handle_ast_error(lock, req, rc,
643 arg->type == LDLM_BL_CALLBACK
644 ? "blocking" : "completion");
647 LDLM_LOCK_RELEASE(lock);
650 atomic_set(&arg->restart, 1);
655 static inline int ldlm_bl_and_cp_ast_fini(struct ptlrpc_request *req,
656 struct ldlm_cb_set_arg *arg,
657 struct ldlm_lock *lock,
663 if (unlikely(instant_cancel)) {
664 rc = ptl_send_rpc(req, 1);
665 ptlrpc_req_finished(req);
667 /* If we cancelled the lock, we need to restart
668 * ldlm_reprocess_queue */
669 atomic_set(&arg->restart, 1);
672 ptlrpc_set_add_req(arg->set, req);
679 * Check if there are requests in the export request list which prevent
680 * the lock canceling and make these requests high priority ones.
682 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
684 struct ptlrpc_request *req;
687 if (lock->l_export == NULL) {
688 LDLM_DEBUG(lock, "client lock: no-op");
692 spin_lock(&lock->l_export->exp_lock);
693 list_for_each_entry(req, &lock->l_export->exp_queued_rpc, rq_exp_list) {
694 if (!req->rq_hp && req->rq_ops->hpreq_lock_match &&
695 req->rq_ops->hpreq_lock_match(req, lock))
696 ptlrpc_hpreq_reorder(req);
698 spin_unlock(&lock->l_export->exp_lock);
703 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
704 * enqueued server lock conflicts with given one.
706 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
707 * to wait for client response.
709 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
710 struct ldlm_lock_desc *desc,
711 void *data, int flag)
713 struct ldlm_cb_set_arg *arg = data;
714 struct ldlm_request *body;
715 struct ptlrpc_request *req;
716 int instant_cancel = 0;
720 if (flag == LDLM_CB_CANCELING)
721 /* Don't need to do anything here. */
725 LASSERT(data != NULL);
726 if (lock->l_export->exp_obd->obd_recovering != 0) {
727 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
728 ldlm_lock_dump(D_ERROR, lock, 0);
731 ldlm_lock_reorder_req(lock);
733 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
734 &RQF_LDLM_BL_CALLBACK,
735 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
739 req->rq_async_args.pointer_arg[0] = arg;
740 req->rq_async_args.pointer_arg[1] = lock;
741 req->rq_interpret_reply = ldlm_cb_interpret;
742 req->rq_no_resend = 1;
744 lock_res(lock->l_resource);
745 if (lock->l_granted_mode != lock->l_req_mode) {
746 /* this blocking AST will be communicated as part of the
747 * completion AST instead */
748 unlock_res(lock->l_resource);
749 ptlrpc_req_finished(req);
750 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
754 if (lock->l_destroyed) {
755 /* What's the point? */
756 unlock_res(lock->l_resource);
757 ptlrpc_req_finished(req);
761 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
764 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
765 body->lock_handle[0] = lock->l_remote_handle;
766 body->lock_desc = *desc;
767 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
769 LDLM_DEBUG(lock, "server preparing blocking AST");
771 ptlrpc_request_set_replen(req);
772 if (instant_cancel) {
773 unlock_res(lock->l_resource);
774 ldlm_lock_cancel(lock);
776 LASSERT(lock->l_granted_mode == lock->l_req_mode);
777 ldlm_add_waiting_lock(lock);
778 unlock_res(lock->l_resource);
781 req->rq_send_state = LUSTRE_IMP_FULL;
782 /* ptlrpc_prep_req already set timeout */
784 req->rq_timeout = ldlm_get_rq_timeout();
786 if (lock->l_export && lock->l_export->exp_nid_stats &&
787 lock->l_export->exp_nid_stats->nid_ldlm_stats)
788 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
789 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
791 rc = ldlm_bl_and_cp_ast_fini(req, arg, lock, instant_cancel);
796 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
798 struct ldlm_cb_set_arg *arg = data;
799 struct ldlm_request *body;
800 struct ptlrpc_request *req;
801 long total_enqueue_wait;
802 int instant_cancel = 0;
806 LASSERT(lock != NULL);
807 LASSERT(data != NULL);
809 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
810 lock->l_last_activity);
812 if (total_enqueue_wait > obd_timeout)
813 /* non-fatal with AT - change to LDLM_DEBUG? */
814 LDLM_WARN(lock, "enqueue wait took %lus from "CFS_TIME_T,
815 total_enqueue_wait, lock->l_last_activity);
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 %lds 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,
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;
871 /* copy ast flags like LDLM_FL_DISCARD_DATA */
872 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
874 /* We might get here prior to ldlm_handle_enqueue setting
875 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
876 * into waiting list, but this is safe and similar code in
877 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
878 * that would not only cancel the lock, but will also remove
879 * it from waiting list */
880 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
881 unlock_res_and_lock(lock);
882 ldlm_lock_cancel(lock);
884 lock_res_and_lock(lock);
886 /* start the lock-timeout clock */
887 ldlm_add_waiting_lock(lock);
890 unlock_res_and_lock(lock);
892 if (lock->l_export && lock->l_export->exp_nid_stats &&
893 lock->l_export->exp_nid_stats->nid_ldlm_stats)
894 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
895 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
897 rc = ldlm_bl_and_cp_ast_fini(req, arg, lock, instant_cancel);
902 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
904 struct ldlm_resource *res = lock->l_resource;
905 struct ldlm_request *body;
906 struct ptlrpc_request *req;
910 LASSERT(lock != NULL);
912 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
913 &RQF_LDLM_GL_CALLBACK,
914 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
919 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
920 body->lock_handle[0] = lock->l_remote_handle;
921 ldlm_lock2desc(lock, &body->lock_desc);
923 lock_res_and_lock(lock);
924 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
925 lock->l_resource->lr_lvb_len);
926 unlock_res_and_lock(lock);
927 res = lock->l_resource;
928 ptlrpc_request_set_replen(req);
931 req->rq_send_state = LUSTRE_IMP_FULL;
932 /* ptlrpc_prep_req already set timeout */
934 req->rq_timeout = ldlm_get_rq_timeout();
936 if (lock->l_export && lock->l_export->exp_nid_stats &&
937 lock->l_export->exp_nid_stats->nid_ldlm_stats)
938 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
939 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
941 rc = ptlrpc_queue_wait(req);
942 if (rc == -ELDLM_NO_LOCK_DATA)
943 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
945 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
947 rc = ldlm_res_lvbo_update(res, req->rq_repmsg,
949 ptlrpc_req_finished(req);
951 ldlm_reprocess_all(res);
957 extern unsigned long long lu_time_stamp_get(void);
959 #define lu_time_stamp_get() time(NULL)
962 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
963 struct lprocfs_stats *srv_stats)
965 int lock_type = 0, op = 0;
967 lock_type = dlm_req->lock_desc.l_resource.lr_type;
971 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
974 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
975 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
977 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
980 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
983 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
991 lprocfs_counter_incr(srv_stats, op);
997 * Main server-side entry point into LDLM. This is called by ptlrpc service
998 * threads to carry out client lock enqueueing requests.
1000 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1001 struct ptlrpc_request *req,
1002 const struct ldlm_request *dlm_req,
1003 const struct ldlm_callback_suite *cbs)
1005 struct ldlm_reply *dlm_rep;
1007 ldlm_error_t err = ELDLM_OK;
1008 struct ldlm_lock *lock = NULL;
1009 void *cookie = NULL;
1013 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1015 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1016 flags = dlm_req->lock_flags;
1018 LASSERT(req->rq_export);
1020 if (req->rq_rqbd->rqbd_service->srv_stats)
1021 ldlm_svc_get_eopc(dlm_req,
1022 req->rq_rqbd->rqbd_service->srv_stats);
1024 if (req->rq_export && req->rq_export->exp_nid_stats &&
1025 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1026 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1027 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1029 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1030 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1031 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1032 dlm_req->lock_desc.l_resource.lr_type);
1033 GOTO(out, rc = -EFAULT);
1036 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1037 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1038 dlm_req->lock_desc.l_req_mode &
1039 (dlm_req->lock_desc.l_req_mode-1))) {
1040 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1041 dlm_req->lock_desc.l_req_mode);
1042 GOTO(out, rc = -EFAULT);
1045 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1046 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1048 DEBUG_REQ(D_ERROR, req,
1049 "PLAIN lock request from IBITS client?");
1050 GOTO(out, rc = -EPROTO);
1052 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1054 DEBUG_REQ(D_ERROR, req,
1055 "IBITS lock request from unaware client?");
1056 GOTO(out, rc = -EPROTO);
1060 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1061 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1062 ibits for mgc/mgs) */
1064 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1065 * inodebits lock if client does not support them. */
1066 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1067 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1068 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1069 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1070 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1071 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1072 dlm_req->lock_desc.l_req_mode = LCK_CR;
1076 if (unlikely(flags & LDLM_FL_REPLAY)) {
1077 /* Find an existing lock in the per-export lock hash */
1078 lock = lustre_hash_lookup(req->rq_export->exp_lock_hash,
1079 (void *)&dlm_req->lock_handle[0]);
1081 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1082 LPX64, lock->l_handle.h_cookie);
1083 GOTO(existing_lock, rc = 0);
1087 /* The lock's callback data might be set in the policy function */
1088 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1089 dlm_req->lock_desc.l_resource.lr_type,
1090 dlm_req->lock_desc.l_req_mode,
1094 GOTO(out, rc = -ENOMEM);
1096 lock->l_last_activity = cfs_time_current_sec();
1097 lock->l_remote_handle = dlm_req->lock_handle[0];
1098 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1100 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1101 /* Don't enqueue a lock onto the export if it has already
1102 * been evicted. Cancel it now instead. (bug 3822) */
1103 if (req->rq_export->exp_failed) {
1104 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1105 GOTO(out, rc = -ENOTCONN);
1107 lock->l_export = class_export_get(req->rq_export);
1109 if (lock->l_export->exp_lock_hash)
1110 lustre_hash_add(lock->l_export->exp_lock_hash,
1111 &lock->l_remote_handle,
1116 if (flags & LDLM_FL_HAS_INTENT) {
1117 /* In this case, the reply buffer is allocated deep in
1118 * local_lock_enqueue by the policy function. */
1121 lock_res_and_lock(lock);
1122 if (lock->l_resource->lr_lvb_len) {
1123 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1125 lock->l_resource->lr_lvb_len);
1127 unlock_res_and_lock(lock);
1129 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1130 GOTO(out, rc = -ENOMEM);
1132 rc = req_capsule_server_pack(&req->rq_pill);
1137 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1138 lock->l_policy_data = dlm_req->lock_desc.l_policy_data;
1139 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1140 lock->l_req_extent = lock->l_policy_data.l_extent;
1142 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1146 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1147 dlm_rep->lock_flags = flags;
1149 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1150 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1152 /* We never send a blocking AST until the lock is granted, but
1153 * we can tell it right now */
1154 lock_res_and_lock(lock);
1156 /* Now take into account flags to be inherited from original lock
1157 request both in reply to client and in our own lock flags. */
1158 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1159 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1161 /* Don't move a pending lock onto the export if it has already
1162 * been evicted. Cancel it now instead. (bug 5683) */
1163 if (unlikely(req->rq_export->exp_failed ||
1164 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1165 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1167 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1168 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1169 if (lock->l_granted_mode == lock->l_req_mode) {
1171 * Only cancel lock if it was granted, because it would
1172 * be destroyed immediatelly and would never be granted
1173 * in the future, causing timeouts on client. Not
1174 * granted lock will be cancelled immediatelly after
1175 * sending completion AST.
1177 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1178 unlock_res_and_lock(lock);
1179 ldlm_lock_cancel(lock);
1180 lock_res_and_lock(lock);
1182 ldlm_add_waiting_lock(lock);
1185 /* Make sure we never ever grant usual metadata locks to liblustre
1187 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1188 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1189 req->rq_export->exp_libclient) {
1190 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1191 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1192 CERROR("Granting sync lock to libclient. "
1193 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1194 dlm_req->lock_flags, dlm_rep->lock_flags,
1196 LDLM_ERROR(lock, "sync lock");
1197 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1198 struct ldlm_intent *it;
1200 it = req_capsule_client_get(&req->rq_pill,
1203 CERROR("This is intent %s ("LPU64")\n",
1204 ldlm_it2str(it->opc), it->opc);
1210 unlock_res_and_lock(lock);
1214 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1215 if (!req->rq_packed_final) {
1216 err = lustre_pack_reply(req, 1, NULL, NULL);
1221 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1222 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1224 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1225 "(err=%d, rc=%d)", err, rc);
1227 lock_res_and_lock(lock);
1229 if (lock->l_resource->lr_lvb_len > 0) {
1232 lvb = req_capsule_server_get(&req->rq_pill,
1234 LASSERTF(lvb != NULL, "req %p, lock %p\n",
1237 memcpy(lvb, lock->l_resource->lr_lvb_data,
1238 lock->l_resource->lr_lvb_len);
1241 ldlm_resource_unlink_lock(lock);
1242 ldlm_lock_destroy_nolock(lock);
1244 unlock_res_and_lock(lock);
1246 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1247 ldlm_reprocess_all(lock->l_resource);
1249 LDLM_LOCK_RELEASE(lock);
1252 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1258 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1259 ldlm_completion_callback completion_callback,
1260 ldlm_blocking_callback blocking_callback,
1261 ldlm_glimpse_callback glimpse_callback)
1263 struct ldlm_request *dlm_req;
1264 struct ldlm_callback_suite cbs = {
1265 .lcs_completion = completion_callback,
1266 .lcs_blocking = blocking_callback,
1267 .lcs_glimpse = glimpse_callback
1271 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1272 if (dlm_req != NULL) {
1273 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1274 req, dlm_req, &cbs);
1281 int ldlm_handle_convert0(struct ptlrpc_request *req,
1282 const struct ldlm_request *dlm_req)
1284 struct ldlm_reply *dlm_rep;
1285 struct ldlm_lock *lock;
1289 if (req->rq_export && req->rq_export->exp_nid_stats &&
1290 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1291 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1292 LDLM_CONVERT - LDLM_FIRST_OPC);
1294 rc = req_capsule_server_pack(&req->rq_pill);
1298 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1299 dlm_rep->lock_flags = dlm_req->lock_flags;
1301 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1303 req->rq_status = EINVAL;
1307 LDLM_DEBUG(lock, "server-side convert handler START");
1309 lock->l_last_activity = cfs_time_current_sec();
1310 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1311 &dlm_rep->lock_flags);
1313 if (ldlm_del_waiting_lock(lock))
1314 LDLM_DEBUG(lock, "converted waiting lock");
1317 req->rq_status = EDEADLOCK;
1322 if (!req->rq_status)
1323 ldlm_reprocess_all(lock->l_resource);
1324 LDLM_DEBUG(lock, "server-side convert handler END");
1325 LDLM_LOCK_PUT(lock);
1327 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1332 int ldlm_handle_convert(struct ptlrpc_request *req)
1335 struct ldlm_request *dlm_req;
1337 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1338 if (dlm_req != NULL) {
1339 rc = ldlm_handle_convert0(req, dlm_req);
1341 CERROR ("Can't unpack dlm_req\n");
1347 /* Cancel all the locks whos handles are packed into ldlm_request */
1348 int ldlm_request_cancel(struct ptlrpc_request *req,
1349 const struct ldlm_request *dlm_req, int first)
1351 struct ldlm_resource *res, *pres = NULL;
1352 struct ldlm_lock *lock;
1353 int i, count, done = 0;
1356 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1360 /* There is no lock on the server at the replay time,
1361 * skip lock cancelling to make replay tests to pass. */
1362 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1365 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1366 "starting at %d", count, first);
1368 for (i = first; i < count; i++) {
1369 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1371 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1372 "lock (cookie "LPU64")",
1373 dlm_req->lock_handle[i].cookie);
1377 res = lock->l_resource;
1382 ldlm_reprocess_all(pres);
1383 LDLM_RESOURCE_DELREF(pres);
1384 ldlm_resource_putref(pres);
1387 ldlm_resource_getref(res);
1388 LDLM_RESOURCE_ADDREF(res);
1389 ldlm_res_lvbo_update(res, NULL, 0, 1);
1393 ldlm_lock_cancel(lock);
1394 LDLM_LOCK_PUT(lock);
1397 ldlm_reprocess_all(pres);
1398 LDLM_RESOURCE_DELREF(pres);
1399 ldlm_resource_putref(pres);
1401 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1405 int ldlm_handle_cancel(struct ptlrpc_request *req)
1407 struct ldlm_request *dlm_req;
1411 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1412 if (dlm_req == NULL) {
1413 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1417 if (req->rq_export && req->rq_export->exp_nid_stats &&
1418 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1419 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1420 LDLM_CANCEL - LDLM_FIRST_OPC);
1422 rc = req_capsule_server_pack(&req->rq_pill);
1426 if (!ldlm_request_cancel(req, dlm_req, 0))
1427 req->rq_status = ESTALE;
1429 if (ptlrpc_reply(req) != 0)
1435 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1436 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1441 LDLM_DEBUG(lock, "client blocking AST callback handler START");
1443 lock_res_and_lock(lock);
1444 lock->l_flags |= LDLM_FL_CBPENDING;
1446 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1447 lock->l_flags |= LDLM_FL_CANCEL;
1449 do_ast = (!lock->l_readers && !lock->l_writers);
1450 unlock_res_and_lock(lock);
1453 LDLM_DEBUG(lock, "already unused, calling "
1454 "callback (%p)", lock->l_blocking_ast);
1455 if (lock->l_blocking_ast != NULL)
1456 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1459 LDLM_DEBUG(lock, "Lock still has references, will be"
1460 " cancelled later");
1463 LDLM_DEBUG(lock, "client blocking callback handler END");
1464 LDLM_LOCK_RELEASE(lock);
1468 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1469 struct ldlm_namespace *ns,
1470 struct ldlm_request *dlm_req,
1471 struct ldlm_lock *lock)
1473 CFS_LIST_HEAD(ast_list);
1476 LDLM_DEBUG(lock, "client completion callback handler START");
1478 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1479 int to = cfs_time_seconds(1);
1481 cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE, to);
1482 if (lock->l_granted_mode == lock->l_req_mode ||
1488 lock_res_and_lock(lock);
1489 if (lock->l_destroyed ||
1490 lock->l_granted_mode == lock->l_req_mode) {
1491 /* bug 11300: the lock has already been granted */
1492 unlock_res_and_lock(lock);
1493 LDLM_DEBUG(lock, "Double grant race happened");
1494 LDLM_LOCK_RELEASE(lock);
1499 /* If we receive the completion AST before the actual enqueue returned,
1500 * then we might need to switch lock modes, resources, or extents. */
1501 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1502 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1503 LDLM_DEBUG(lock, "completion AST, new lock mode");
1506 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1507 lock->l_policy_data = dlm_req->lock_desc.l_policy_data;
1508 LDLM_DEBUG(lock, "completion AST, new policy data");
1511 ldlm_resource_unlink_lock(lock);
1512 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1513 &lock->l_resource->lr_name,
1514 sizeof(lock->l_resource->lr_name)) != 0) {
1515 unlock_res_and_lock(lock);
1516 if (ldlm_lock_change_resource(ns, lock,
1517 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1518 LDLM_ERROR(lock, "Failed to allocate resource");
1519 LDLM_LOCK_RELEASE(lock);
1523 LDLM_DEBUG(lock, "completion AST, new resource");
1524 CERROR("change resource!\n");
1525 lock_res_and_lock(lock);
1528 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1529 /* BL_AST locks are not needed in lru.
1530 * let ldlm_cancel_lru() be fast. */
1531 ldlm_lock_remove_from_lru(lock);
1532 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1533 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1536 if (lock->l_lvb_len) {
1537 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1538 RCL_CLIENT) < lock->l_lvb_len) {
1539 LDLM_ERROR(lock, "completion AST did not contain "
1542 void *lvb = req_capsule_client_swab_get(&req->rq_pill,
1544 (void *)lock->l_lvb_swabber);
1545 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1549 ldlm_grant_lock(lock, &ast_list);
1550 unlock_res_and_lock(lock);
1552 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1554 ldlm_run_ast_work(&ast_list, LDLM_WORK_CP_AST);
1556 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1558 LDLM_LOCK_RELEASE(lock);
1562 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1563 struct ldlm_namespace *ns,
1564 struct ldlm_request *dlm_req,
1565 struct ldlm_lock *lock)
1570 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1572 if (lock->l_glimpse_ast != NULL)
1573 rc = lock->l_glimpse_ast(lock, req);
1575 if (req->rq_repmsg != NULL) {
1578 req->rq_status = rc;
1582 lock_res_and_lock(lock);
1583 if (lock->l_granted_mode == LCK_PW &&
1584 !lock->l_readers && !lock->l_writers &&
1585 cfs_time_after(cfs_time_current(),
1586 cfs_time_add(lock->l_last_used,
1587 cfs_time_seconds(10)))) {
1588 unlock_res_and_lock(lock);
1589 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1590 ldlm_handle_bl_callback(ns, NULL, lock);
1595 unlock_res_and_lock(lock);
1596 LDLM_LOCK_RELEASE(lock);
1600 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1602 if (req->rq_no_reply)
1605 req->rq_status = rc;
1606 if (!req->rq_packed_final) {
1607 rc = lustre_pack_reply(req, 1, NULL, NULL);
1611 return ptlrpc_reply(req);
1615 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1616 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1617 struct list_head *cancels, int count)
1619 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1620 struct ldlm_bl_work_item *blwi;
1623 if (cancels && count == 0)
1626 OBD_ALLOC(blwi, sizeof(*blwi));
1632 blwi->blwi_ld = *ld;
1634 list_add(&blwi->blwi_head, cancels);
1635 list_del_init(cancels);
1636 blwi->blwi_count = count;
1638 blwi->blwi_lock = lock;
1640 spin_lock(&blp->blp_lock);
1641 if (lock && lock->l_flags & LDLM_FL_DISCARD_DATA) {
1642 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1643 list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1645 /* other blocking callbacks are added to the regular list */
1646 list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1648 cfs_waitq_signal(&blp->blp_waitq);
1649 spin_unlock(&blp->blp_lock);
1655 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1656 struct ldlm_lock *lock)
1659 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0));
1665 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1666 struct list_head *cancels, int count)
1669 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count));
1675 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1676 static int ldlm_callback_handler(struct ptlrpc_request *req)
1678 struct ldlm_namespace *ns;
1679 struct ldlm_request *dlm_req;
1680 struct ldlm_lock *lock;
1684 /* Requests arrive in sender's byte order. The ptlrpc service
1685 * handler has already checked and, if necessary, byte-swapped the
1686 * incoming request message body, but I am responsible for the
1687 * message buffers. */
1689 /* do nothing for sec context finalize */
1690 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1693 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1695 if (req->rq_export == NULL) {
1696 ldlm_callback_reply(req, -ENOTCONN);
1700 LASSERT(req->rq_export != NULL);
1701 LASSERT(req->rq_export->exp_obd != NULL);
1703 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1704 case LDLM_BL_CALLBACK:
1705 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
1708 case LDLM_CP_CALLBACK:
1709 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
1712 case LDLM_GL_CALLBACK:
1713 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
1716 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
1717 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
1718 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1719 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1721 rc = llog_origin_handle_cancel(req);
1722 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1724 ldlm_callback_reply(req, rc);
1726 case OBD_QC_CALLBACK:
1727 req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
1728 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
1730 rc = target_handle_qc_callback(req);
1731 ldlm_callback_reply(req, rc);
1735 /* reply in handler */
1736 req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
1737 rc = target_handle_dqacq_callback(req);
1739 case LLOG_ORIGIN_HANDLE_CREATE:
1740 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
1741 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1743 rc = llog_origin_handle_create(req);
1744 ldlm_callback_reply(req, rc);
1746 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1747 req_capsule_set(&req->rq_pill,
1748 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1749 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1751 rc = llog_origin_handle_next_block(req);
1752 ldlm_callback_reply(req, rc);
1754 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1755 req_capsule_set(&req->rq_pill,
1756 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1757 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1759 rc = llog_origin_handle_read_header(req);
1760 ldlm_callback_reply(req, rc);
1762 case LLOG_ORIGIN_HANDLE_CLOSE:
1763 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
1765 rc = llog_origin_handle_close(req);
1766 ldlm_callback_reply(req, rc);
1769 CERROR("unknown opcode %u\n",
1770 lustre_msg_get_opc(req->rq_reqmsg));
1771 ldlm_callback_reply(req, -EPROTO);
1775 ns = req->rq_export->exp_obd->obd_namespace;
1776 LASSERT(ns != NULL);
1778 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1780 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1781 if (dlm_req == NULL) {
1782 ldlm_callback_reply(req, -EPROTO);
1786 /* Force a known safe race, send a cancel to the server for a lock
1787 * which the server has already started a blocking callback on. */
1788 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
1789 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1790 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
1792 CERROR("ldlm_cli_cancel: %d\n", rc);
1795 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
1797 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
1798 "disappeared\n", dlm_req->lock_handle[0].cookie);
1799 ldlm_callback_reply(req, -EINVAL);
1803 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
1804 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
1805 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
1807 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1808 lock_res_and_lock(lock);
1809 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1810 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
1811 /* If somebody cancels lock and cache is already droped,
1812 * or lock is failed before cp_ast received on client,
1813 * we can tell the server we have no lock. Otherwise, we
1814 * should send cancel after dropping the cache. */
1815 if (((lock->l_flags & LDLM_FL_CANCELING) &&
1816 (lock->l_flags & LDLM_FL_BL_DONE)) ||
1817 (lock->l_flags & LDLM_FL_FAILED)) {
1818 LDLM_DEBUG(lock, "callback on lock "
1819 LPX64" - lock disappeared\n",
1820 dlm_req->lock_handle[0].cookie);
1821 unlock_res_and_lock(lock);
1822 LDLM_LOCK_RELEASE(lock);
1823 ldlm_callback_reply(req, -EINVAL);
1826 /* BL_AST locks are not needed in lru.
1827 * let ldlm_cancel_lru() be fast. */
1828 ldlm_lock_remove_from_lru(lock);
1829 lock->l_flags |= LDLM_FL_BL_AST;
1831 unlock_res_and_lock(lock);
1833 /* We want the ost thread to get this reply so that it can respond
1834 * to ost requests (write cache writeback) that might be triggered
1837 * But we'd also like to be able to indicate in the reply that we're
1838 * cancelling right now, because it's unused, or have an intent result
1839 * in the reply, so we might have to push the responsibility for sending
1840 * the reply down into the AST handlers, alas. */
1842 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1843 case LDLM_BL_CALLBACK:
1844 CDEBUG(D_INODE, "blocking ast\n");
1845 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
1846 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK))
1847 ldlm_callback_reply(req, 0);
1848 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
1849 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
1851 case LDLM_CP_CALLBACK:
1852 CDEBUG(D_INODE, "completion ast\n");
1853 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
1854 ldlm_callback_reply(req, 0);
1855 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
1857 case LDLM_GL_CALLBACK:
1858 CDEBUG(D_INODE, "glimpse ast\n");
1859 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
1860 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
1863 LBUG(); /* checked above */
1869 static int ldlm_cancel_handler(struct ptlrpc_request *req)
1874 /* Requests arrive in sender's byte order. The ptlrpc service
1875 * handler has already checked and, if necessary, byte-swapped the
1876 * incoming request message body, but I am responsible for the
1877 * message buffers. */
1879 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1881 if (req->rq_export == NULL) {
1882 struct ldlm_request *dlm_req;
1884 CERROR("operation %d from %s with bad export cookie "LPU64"\n",
1885 lustre_msg_get_opc(req->rq_reqmsg),
1886 libcfs_id2str(req->rq_peer),
1887 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
1889 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1890 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1891 if (dlm_req != NULL)
1892 ldlm_lock_dump_handle(D_ERROR,
1893 &dlm_req->lock_handle[0]);
1894 ldlm_callback_reply(req, -ENOTCONN);
1898 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1900 /* XXX FIXME move this back to mds/handler.c, bug 249 */
1902 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
1903 CDEBUG(D_INODE, "cancel\n");
1904 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
1906 rc = ldlm_handle_cancel(req);
1910 case OBD_LOG_CANCEL:
1911 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
1912 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
1914 rc = llog_origin_handle_cancel(req);
1915 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
1917 ldlm_callback_reply(req, rc);
1920 CERROR("invalid opcode %d\n",
1921 lustre_msg_get_opc(req->rq_reqmsg));
1922 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
1923 ldlm_callback_reply(req, -EINVAL);
1929 void ldlm_revoke_lock_cb(void *obj, void *data)
1931 struct list_head *rpc_list = data;
1932 struct ldlm_lock *lock = obj;
1934 lock_res_and_lock(lock);
1936 if (lock->l_req_mode != lock->l_granted_mode) {
1937 unlock_res_and_lock(lock);
1941 LASSERT(lock->l_resource);
1942 if (lock->l_resource->lr_type != LDLM_IBITS &&
1943 lock->l_resource->lr_type != LDLM_PLAIN) {
1944 unlock_res_and_lock(lock);
1948 if (lock->l_flags & LDLM_FL_AST_SENT) {
1949 unlock_res_and_lock(lock);
1953 LASSERT(lock->l_blocking_ast);
1954 LASSERT(!lock->l_blocking_lock);
1956 lock->l_flags |= LDLM_FL_AST_SENT;
1957 if (lock->l_export && lock->l_export->exp_lock_hash &&
1958 !hlist_unhashed(&lock->l_exp_hash))
1959 lustre_hash_del(lock->l_export->exp_lock_hash,
1960 &lock->l_remote_handle, &lock->l_exp_hash);
1961 list_add_tail(&lock->l_rk_ast, rpc_list);
1962 LDLM_LOCK_GET(lock);
1964 unlock_res_and_lock(lock);
1967 void ldlm_revoke_export_locks(struct obd_export *exp)
1969 struct list_head rpc_list;
1972 CFS_INIT_LIST_HEAD(&rpc_list);
1973 lustre_hash_for_each_empty(exp->exp_lock_hash,
1974 ldlm_revoke_lock_cb, &rpc_list);
1975 ldlm_run_ast_work(&rpc_list, LDLM_WORK_REVOKE_AST);
1981 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
1983 struct ldlm_bl_work_item *blwi = NULL;
1984 static unsigned int num_bl = 0;
1986 spin_lock(&blp->blp_lock);
1987 /* process a request from the blp_list at least every blp_num_threads */
1988 if (!list_empty(&blp->blp_list) &&
1989 (list_empty(&blp->blp_prio_list) || num_bl == 0))
1990 blwi = list_entry(blp->blp_list.next,
1991 struct ldlm_bl_work_item, blwi_entry);
1993 if (!list_empty(&blp->blp_prio_list))
1994 blwi = list_entry(blp->blp_prio_list.next,
1995 struct ldlm_bl_work_item, blwi_entry);
1998 if (++num_bl >= atomic_read(&blp->blp_num_threads))
2000 list_del(&blwi->blwi_entry);
2002 spin_unlock(&blp->blp_lock);
2007 /* This only contains temporary data until the thread starts */
2008 struct ldlm_bl_thread_data {
2009 char bltd_name[CFS_CURPROC_COMM_MAX];
2010 struct ldlm_bl_pool *bltd_blp;
2011 struct completion bltd_comp;
2015 static int ldlm_bl_thread_main(void *arg);
2017 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2019 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2022 init_completion(&bltd.bltd_comp);
2023 rc = cfs_kernel_thread(ldlm_bl_thread_main, &bltd, 0);
2025 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2026 atomic_read(&blp->blp_num_threads), rc);
2029 wait_for_completion(&bltd.bltd_comp);
2034 static int ldlm_bl_thread_main(void *arg)
2036 struct ldlm_bl_pool *blp;
2040 struct ldlm_bl_thread_data *bltd = arg;
2042 blp = bltd->bltd_blp;
2044 bltd->bltd_num = atomic_inc_return(&blp->blp_num_threads) - 1;
2045 atomic_inc(&blp->blp_busy_threads);
2047 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2048 "ldlm_bl_%02d", bltd->bltd_num);
2049 cfs_daemonize(bltd->bltd_name);
2051 complete(&bltd->bltd_comp);
2052 /* cannot use bltd after this, it is only on caller's stack */
2056 struct l_wait_info lwi = { 0 };
2057 struct ldlm_bl_work_item *blwi = NULL;
2059 blwi = ldlm_bl_get_work(blp);
2064 atomic_dec(&blp->blp_busy_threads);
2065 l_wait_event_exclusive(blp->blp_waitq,
2066 (blwi = ldlm_bl_get_work(blp)) != NULL,
2068 busy = atomic_inc_return(&blp->blp_busy_threads);
2070 if (blwi->blwi_ns == NULL)
2071 /* added by ldlm_cleanup() */
2074 /* Not fatal if racy and have a few too many threads */
2075 if (unlikely(busy < blp->blp_max_threads &&
2076 busy >= atomic_read(&blp->blp_num_threads)))
2077 /* discard the return value, we tried */
2078 ldlm_bl_thread_start(blp);
2080 if (blwi->blwi_ns == NULL)
2081 /* added by ldlm_cleanup() */
2085 if (blwi->blwi_count) {
2086 /* The special case when we cancel locks in lru
2087 * asynchronously, we pass the list of locks here.
2088 * Thus lock is marked LDLM_FL_CANCELING, and already
2089 * canceled locally. */
2090 ldlm_cli_cancel_list(&blwi->blwi_head,
2091 blwi->blwi_count, NULL, 0);
2093 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2096 OBD_FREE(blwi, sizeof(*blwi));
2099 atomic_dec(&blp->blp_busy_threads);
2100 atomic_dec(&blp->blp_num_threads);
2101 complete(&blp->blp_comp);
2107 static int ldlm_setup(void);
2108 static int ldlm_cleanup(void);
2110 int ldlm_get_ref(void)
2114 mutex_down(&ldlm_ref_sem);
2115 if (++ldlm_refcount == 1) {
2120 mutex_up(&ldlm_ref_sem);
2125 void ldlm_put_ref(void)
2128 mutex_down(&ldlm_ref_sem);
2129 if (ldlm_refcount == 1) {
2130 int rc = ldlm_cleanup();
2132 CERROR("ldlm_cleanup failed: %d\n", rc);
2138 mutex_up(&ldlm_ref_sem);
2144 * Export handle<->lock hash operations.
2147 ldlm_export_lock_hash(lustre_hash_t *lh, void *key, unsigned mask)
2149 return lh_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2153 ldlm_export_lock_key(struct hlist_node *hnode)
2155 struct ldlm_lock *lock;
2158 lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2159 RETURN(&lock->l_remote_handle);
2163 ldlm_export_lock_compare(void *key, struct hlist_node *hnode)
2166 RETURN(lustre_handle_equal(ldlm_export_lock_key(hnode), key));
2170 ldlm_export_lock_get(struct hlist_node *hnode)
2172 struct ldlm_lock *lock;
2175 lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2176 LDLM_LOCK_GET(lock);
2182 ldlm_export_lock_put(struct hlist_node *hnode)
2184 struct ldlm_lock *lock;
2187 lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2188 LDLM_LOCK_RELEASE(lock);
2193 static lustre_hash_ops_t ldlm_export_lock_ops = {
2194 .lh_hash = ldlm_export_lock_hash,
2195 .lh_key = ldlm_export_lock_key,
2196 .lh_compare = ldlm_export_lock_compare,
2197 .lh_get = ldlm_export_lock_get,
2198 .lh_put = ldlm_export_lock_put
2201 int ldlm_init_export(struct obd_export *exp)
2205 exp->exp_lock_hash =
2206 lustre_hash_init(obd_uuid2str(&exp->exp_client_uuid),
2207 7, 16, &ldlm_export_lock_ops, LH_REHASH);
2209 if (!exp->exp_lock_hash)
2214 EXPORT_SYMBOL(ldlm_init_export);
2216 void ldlm_destroy_export(struct obd_export *exp)
2219 lustre_hash_exit(exp->exp_lock_hash);
2220 exp->exp_lock_hash = NULL;
2223 EXPORT_SYMBOL(ldlm_destroy_export);
2225 static int ldlm_setup(void)
2227 struct ldlm_bl_pool *blp;
2229 int ldlm_min_threads = LDLM_THREADS_AUTO_MIN;
2230 int ldlm_max_threads = LDLM_THREADS_AUTO_MAX;
2236 if (ldlm_state != NULL)
2239 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2240 if (ldlm_state == NULL)
2244 rc = ldlm_proc_setup();
2250 if (ldlm_num_threads) {
2251 /* If ldlm_num_threads is set, it is the min and the max. */
2252 if (ldlm_num_threads > LDLM_THREADS_AUTO_MAX)
2253 ldlm_num_threads = LDLM_THREADS_AUTO_MAX;
2254 if (ldlm_num_threads < LDLM_THREADS_AUTO_MIN)
2255 ldlm_num_threads = LDLM_THREADS_AUTO_MIN;
2256 ldlm_min_threads = ldlm_max_threads = ldlm_num_threads;
2260 ldlm_state->ldlm_cb_service =
2261 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2262 LDLM_MAXREPSIZE, LDLM_CB_REQUEST_PORTAL,
2263 LDLM_CB_REPLY_PORTAL, 1800,
2264 ldlm_callback_handler, "ldlm_cbd",
2265 ldlm_svc_proc_dir, NULL,
2266 ldlm_min_threads, ldlm_max_threads,
2268 LCT_MD_THREAD|LCT_DT_THREAD, NULL);
2270 if (!ldlm_state->ldlm_cb_service) {
2271 CERROR("failed to start service\n");
2272 GOTO(out_proc, rc = -ENOMEM);
2275 ldlm_state->ldlm_cancel_service =
2276 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
2277 LDLM_MAXREPSIZE, LDLM_CANCEL_REQUEST_PORTAL,
2278 LDLM_CANCEL_REPLY_PORTAL, 6000,
2279 ldlm_cancel_handler, "ldlm_canceld",
2280 ldlm_svc_proc_dir, NULL,
2281 ldlm_min_threads, ldlm_max_threads,
2283 LCT_MD_THREAD|LCT_DT_THREAD|LCT_CL_THREAD,
2286 if (!ldlm_state->ldlm_cancel_service) {
2287 CERROR("failed to start service\n");
2288 GOTO(out_proc, rc = -ENOMEM);
2291 OBD_ALLOC(blp, sizeof(*blp));
2293 GOTO(out_proc, rc = -ENOMEM);
2294 ldlm_state->ldlm_bl_pool = blp;
2296 spin_lock_init(&blp->blp_lock);
2297 CFS_INIT_LIST_HEAD(&blp->blp_list);
2298 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2299 cfs_waitq_init(&blp->blp_waitq);
2300 atomic_set(&blp->blp_num_threads, 0);
2301 atomic_set(&blp->blp_busy_threads, 0);
2302 blp->blp_min_threads = ldlm_min_threads;
2303 blp->blp_max_threads = ldlm_max_threads;
2306 for (i = 0; i < blp->blp_min_threads; i++) {
2307 rc = ldlm_bl_thread_start(blp);
2309 GOTO(out_thread, rc);
2312 rc = ptlrpc_start_threads(NULL, ldlm_state->ldlm_cancel_service);
2314 GOTO(out_thread, rc);
2316 rc = ptlrpc_start_threads(NULL, ldlm_state->ldlm_cb_service);
2318 GOTO(out_thread, rc);
2320 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2321 expired_lock_thread.elt_state = ELT_STOPPED;
2322 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2324 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2325 spin_lock_init(&waiting_locks_spinlock);
2326 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2328 rc = cfs_kernel_thread(expired_lock_main, NULL, CLONE_VM | CLONE_FILES);
2330 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2331 GOTO(out_thread, rc);
2334 wait_event(expired_lock_thread.elt_waitq,
2335 expired_lock_thread.elt_state == ELT_READY);
2339 rc = ldlm_pools_init();
2341 GOTO(out_thread, rc);
2347 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2348 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2353 ldlm_proc_cleanup();
2356 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2361 static int ldlm_cleanup(void)
2364 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2368 if (!list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2369 !list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2370 CERROR("ldlm still has namespaces; clean these up first.\n");
2371 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2372 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2381 while (atomic_read(&blp->blp_num_threads) > 0) {
2382 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2384 init_completion(&blp->blp_comp);
2386 spin_lock(&blp->blp_lock);
2387 list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2388 cfs_waitq_signal(&blp->blp_waitq);
2389 spin_unlock(&blp->blp_lock);
2391 wait_for_completion(&blp->blp_comp);
2393 OBD_FREE(blp, sizeof(*blp));
2395 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2396 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2397 ldlm_proc_cleanup();
2399 expired_lock_thread.elt_state = ELT_TERMINATE;
2400 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2401 wait_event(expired_lock_thread.elt_waitq,
2402 expired_lock_thread.elt_state == ELT_STOPPED);
2404 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2405 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2408 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2414 int __init ldlm_init(void)
2416 init_mutex(&ldlm_ref_sem);
2417 init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2418 init_mutex(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2419 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2420 sizeof(struct ldlm_resource), 0,
2421 SLAB_HWCACHE_ALIGN);
2422 if (ldlm_resource_slab == NULL)
2425 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2426 sizeof(struct ldlm_lock), 0,
2427 SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU);
2428 if (ldlm_lock_slab == NULL) {
2429 cfs_mem_cache_destroy(ldlm_resource_slab);
2433 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2434 sizeof(struct ldlm_interval),
2435 0, SLAB_HWCACHE_ALIGN);
2436 if (ldlm_interval_slab == NULL) {
2437 cfs_mem_cache_destroy(ldlm_resource_slab);
2438 cfs_mem_cache_destroy(ldlm_lock_slab);
2445 void __exit ldlm_exit(void)
2449 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2450 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2451 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2452 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2453 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2454 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2455 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2459 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2462 EXPORT_SYMBOL(ldlm_get_processing_policy);
2463 EXPORT_SYMBOL(ldlm_lock2desc);
2464 EXPORT_SYMBOL(ldlm_register_intent);
2465 EXPORT_SYMBOL(ldlm_lockname);
2466 EXPORT_SYMBOL(ldlm_typename);
2467 EXPORT_SYMBOL(ldlm_lock2handle);
2468 EXPORT_SYMBOL(__ldlm_handle2lock);
2469 EXPORT_SYMBOL(ldlm_lock_get);
2470 EXPORT_SYMBOL(ldlm_lock_put);
2471 EXPORT_SYMBOL(ldlm_lock_match);
2472 EXPORT_SYMBOL(ldlm_lock_cancel);
2473 EXPORT_SYMBOL(ldlm_lock_addref);
2474 EXPORT_SYMBOL(ldlm_lock_addref_try);
2475 EXPORT_SYMBOL(ldlm_lock_decref);
2476 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2477 EXPORT_SYMBOL(ldlm_lock_change_resource);
2478 EXPORT_SYMBOL(ldlm_it2str);
2479 EXPORT_SYMBOL(ldlm_lock_dump);
2480 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2481 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
2482 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2483 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
2484 EXPORT_SYMBOL(ldlm_lock_allow_match);
2485 EXPORT_SYMBOL(ldlm_lock_downgrade);
2486 EXPORT_SYMBOL(ldlm_lock_convert);
2488 /* ldlm_request.c */
2489 EXPORT_SYMBOL(ldlm_completion_ast_async);
2490 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2491 EXPORT_SYMBOL(ldlm_completion_ast);
2492 EXPORT_SYMBOL(ldlm_blocking_ast);
2493 EXPORT_SYMBOL(ldlm_glimpse_ast);
2494 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2495 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2496 EXPORT_SYMBOL(ldlm_prep_elc_req);
2497 EXPORT_SYMBOL(ldlm_cli_convert);
2498 EXPORT_SYMBOL(ldlm_cli_enqueue);
2499 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2500 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2501 EXPORT_SYMBOL(ldlm_cli_cancel);
2502 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2503 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2504 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2505 EXPORT_SYMBOL(ldlm_replay_locks);
2506 EXPORT_SYMBOL(ldlm_resource_foreach);
2507 EXPORT_SYMBOL(ldlm_namespace_foreach);
2508 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
2509 EXPORT_SYMBOL(ldlm_resource_iterate);
2510 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2511 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2514 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2515 EXPORT_SYMBOL(ldlm_server_completion_ast);
2516 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2517 EXPORT_SYMBOL(ldlm_handle_enqueue);
2518 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2519 EXPORT_SYMBOL(ldlm_handle_cancel);
2520 EXPORT_SYMBOL(ldlm_request_cancel);
2521 EXPORT_SYMBOL(ldlm_handle_convert);
2522 EXPORT_SYMBOL(ldlm_handle_convert0);
2523 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2524 EXPORT_SYMBOL(ldlm_get_ref);
2525 EXPORT_SYMBOL(ldlm_put_ref);
2526 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2527 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2529 /* ldlm_resource.c */
2530 EXPORT_SYMBOL(ldlm_namespace_new);
2531 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2532 EXPORT_SYMBOL(ldlm_namespace_free);
2533 EXPORT_SYMBOL(ldlm_namespace_dump);
2534 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
2535 EXPORT_SYMBOL(ldlm_resource_get);
2536 EXPORT_SYMBOL(ldlm_resource_putref);
2537 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
2540 EXPORT_SYMBOL(client_import_add_conn);
2541 EXPORT_SYMBOL(client_import_del_conn);
2542 EXPORT_SYMBOL(client_obd_setup);
2543 EXPORT_SYMBOL(client_obd_cleanup);
2544 EXPORT_SYMBOL(client_connect_import);
2545 EXPORT_SYMBOL(client_disconnect_export);
2546 EXPORT_SYMBOL(target_stop_recovery_thread);
2547 EXPORT_SYMBOL(target_handle_connect);
2548 EXPORT_SYMBOL(target_cleanup_recovery);
2549 EXPORT_SYMBOL(target_destroy_export);
2550 EXPORT_SYMBOL(target_cancel_recovery_timer);
2551 EXPORT_SYMBOL(target_send_reply);
2552 EXPORT_SYMBOL(target_queue_recovery_request);
2553 EXPORT_SYMBOL(target_handle_ping);
2554 EXPORT_SYMBOL(target_pack_pool_reply);
2555 EXPORT_SYMBOL(target_handle_disconnect);
2558 EXPORT_SYMBOL(lock_res_and_lock);
2559 EXPORT_SYMBOL(unlock_res_and_lock);