4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
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>
42 #define DEBUG_SUBSYSTEM S_LDLM
45 # include <libcfs/libcfs.h>
47 # include <liblustre.h>
50 #include <lustre_dlm.h>
51 #include <obd_class.h>
52 #include <libcfs/list.h>
53 #include "ldlm_internal.h"
55 static int ldlm_num_threads;
56 CFS_MODULE_PARM(ldlm_num_threads, "i", int, 0444,
57 "number of DLM service threads to start");
59 static char *ldlm_cpts;
60 CFS_MODULE_PARM(ldlm_cpts, "s", charp, 0444,
61 "CPU partitions ldlm threads should run on");
63 extern cfs_mem_cache_t *ldlm_resource_slab;
64 extern cfs_mem_cache_t *ldlm_lock_slab;
65 static struct mutex ldlm_ref_mutex;
66 static int ldlm_refcount;
68 struct ldlm_cb_async_args {
69 struct ldlm_cb_set_arg *ca_set_arg;
70 struct ldlm_lock *ca_lock;
75 static struct ldlm_state *ldlm_state;
77 inline cfs_time_t round_timeout(cfs_time_t timeout)
79 return cfs_time_seconds((int)cfs_duration_sec(cfs_time_sub(timeout, 0)) + 1);
82 /* timeout for initial callback (AST) reply (bz10399) */
83 static inline unsigned int ldlm_get_rq_timeout(void)
86 unsigned int timeout = min(ldlm_timeout, obd_timeout / 3);
88 return timeout < 1 ? 1 : timeout;
93 #define ELT_TERMINATE 2
99 * blp_prio_list is used for callbacks that should be handled
100 * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
103 cfs_list_t blp_prio_list;
106 * blp_list is used for all other callbacks which are likely
107 * to take longer to process.
111 cfs_waitq_t blp_waitq;
112 struct completion blp_comp;
113 cfs_atomic_t blp_num_threads;
114 cfs_atomic_t blp_busy_threads;
119 struct ldlm_bl_work_item {
120 cfs_list_t blwi_entry;
121 struct ldlm_namespace *blwi_ns;
122 struct ldlm_lock_desc blwi_ld;
123 struct ldlm_lock *blwi_lock;
124 cfs_list_t blwi_head;
126 struct completion blwi_comp;
128 int blwi_mem_pressure;
131 #if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
133 /* w_l_spinlock protects both waiting_locks_list and expired_lock_thread */
134 static spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
135 static cfs_list_t waiting_locks_list;
136 static cfs_timer_t waiting_locks_timer;
138 static struct expired_lock_thread {
139 cfs_waitq_t elt_waitq;
142 cfs_list_t elt_expired_locks;
143 } expired_lock_thread;
145 static inline int have_expired_locks(void)
150 spin_lock_bh(&waiting_locks_spinlock);
151 need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks);
152 spin_unlock_bh(&waiting_locks_spinlock);
157 static int expired_lock_main(void *arg)
159 cfs_list_t *expired = &expired_lock_thread.elt_expired_locks;
160 struct l_wait_info lwi = { 0 };
164 cfs_daemonize("ldlm_elt");
166 expired_lock_thread.elt_state = ELT_READY;
167 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
170 l_wait_event(expired_lock_thread.elt_waitq,
171 have_expired_locks() ||
172 expired_lock_thread.elt_state == ELT_TERMINATE,
175 spin_lock_bh(&waiting_locks_spinlock);
176 if (expired_lock_thread.elt_dump) {
177 struct libcfs_debug_msg_data msgdata = {
178 .msg_file = __FILE__,
179 .msg_fn = "waiting_locks_callback",
180 .msg_line = expired_lock_thread.elt_dump };
181 spin_unlock_bh(&waiting_locks_spinlock);
183 /* from waiting_locks_callback, but not in timer */
184 libcfs_debug_dumplog();
185 libcfs_run_lbug_upcall(&msgdata);
187 spin_lock_bh(&waiting_locks_spinlock);
188 expired_lock_thread.elt_dump = 0;
193 while (!cfs_list_empty(expired)) {
194 struct obd_export *export;
195 struct ldlm_lock *lock;
197 lock = cfs_list_entry(expired->next, struct ldlm_lock,
199 if ((void *)lock < LP_POISON + CFS_PAGE_SIZE &&
200 (void *)lock >= LP_POISON) {
201 spin_unlock_bh(&waiting_locks_spinlock);
202 CERROR("free lock on elt list %p\n", lock);
205 cfs_list_del_init(&lock->l_pending_chain);
206 if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE &&
207 (void *)lock->l_export >= LP_POISON) {
208 CERROR("lock with free export on elt list %p\n",
210 lock->l_export = NULL;
211 LDLM_ERROR(lock, "free export");
212 /* release extra ref grabbed by
213 * ldlm_add_waiting_lock() or
214 * ldlm_failed_ast() */
215 LDLM_LOCK_RELEASE(lock);
219 if (lock->l_destroyed) {
220 /* release the lock refcount where
221 * waiting_locks_callback() founds */
222 LDLM_LOCK_RELEASE(lock);
225 export = class_export_lock_get(lock->l_export, lock);
226 spin_unlock_bh(&waiting_locks_spinlock);
229 class_fail_export(export);
230 class_export_lock_put(export, lock);
232 /* release extra ref grabbed by ldlm_add_waiting_lock()
233 * or ldlm_failed_ast() */
234 LDLM_LOCK_RELEASE(lock);
236 spin_lock_bh(&waiting_locks_spinlock);
238 spin_unlock_bh(&waiting_locks_spinlock);
240 if (do_dump && obd_dump_on_eviction) {
241 CERROR("dump the log upon eviction\n");
242 libcfs_debug_dumplog();
245 if (expired_lock_thread.elt_state == ELT_TERMINATE)
249 expired_lock_thread.elt_state = ELT_STOPPED;
250 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
254 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
255 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds);
258 * Check if there is a request in the export request list
259 * which prevents the lock canceling.
261 static int ldlm_lock_busy(struct ldlm_lock *lock)
263 struct ptlrpc_request *req;
267 if (lock->l_export == NULL)
270 spin_lock_bh(&lock->l_export->exp_rpc_lock);
271 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
273 if (req->rq_ops->hpreq_lock_match) {
274 match = req->rq_ops->hpreq_lock_match(req, lock);
279 spin_unlock_bh(&lock->l_export->exp_rpc_lock);
283 /* This is called from within a timer interrupt and cannot schedule */
284 static void waiting_locks_callback(unsigned long unused)
286 struct ldlm_lock *lock;
289 spin_lock_bh(&waiting_locks_spinlock);
290 while (!cfs_list_empty(&waiting_locks_list)) {
291 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
293 if (cfs_time_after(lock->l_callback_timeout,
294 cfs_time_current()) ||
295 (lock->l_req_mode == LCK_GROUP))
298 if (ptlrpc_check_suspend()) {
299 /* there is a case when we talk to one mds, holding
300 * lock from another mds. this way we easily can get
301 * here, if second mds is being recovered. so, we
302 * suspend timeouts. bug 6019 */
304 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
305 lock->l_export->exp_client_uuid.uuid,
306 lock->l_export->exp_connection->c_remote_uuid.uuid,
307 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
309 cfs_list_del_init(&lock->l_pending_chain);
310 if (lock->l_destroyed) {
311 /* relay the lock refcount decrease to
312 * expired lock thread */
313 cfs_list_add(&lock->l_pending_chain,
314 &expired_lock_thread.elt_expired_locks);
316 __ldlm_add_waiting_lock(lock,
317 ldlm_get_enq_timeout(lock));
322 /* if timeout overlaps the activation time of suspended timeouts
323 * then extend it to give a chance for client to reconnect */
324 if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
325 cfs_time_seconds(obd_timeout)/2),
326 ptlrpc_suspend_wakeup_time())) {
327 LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
328 lock->l_export->exp_client_uuid.uuid,
329 lock->l_export->exp_connection->c_remote_uuid.uuid,
330 libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
332 cfs_list_del_init(&lock->l_pending_chain);
333 if (lock->l_destroyed) {
334 /* relay the lock refcount decrease to
335 * expired lock thread */
336 cfs_list_add(&lock->l_pending_chain,
337 &expired_lock_thread.elt_expired_locks);
339 __ldlm_add_waiting_lock(lock,
340 ldlm_get_enq_timeout(lock));
345 /* Check if we need to prolong timeout */
346 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) &&
347 ldlm_lock_busy(lock)) {
350 if (lock->l_pending_chain.next == &waiting_locks_list)
355 spin_unlock_bh(&waiting_locks_spinlock);
356 LDLM_DEBUG(lock, "prolong the busy lock");
357 ldlm_refresh_waiting_lock(lock,
358 ldlm_get_enq_timeout(lock));
359 spin_lock_bh(&waiting_locks_spinlock);
362 LDLM_LOCK_RELEASE(lock);
366 LDLM_LOCK_RELEASE(lock);
369 ldlm_lock_to_ns(lock)->ns_timeouts++;
370 LDLM_ERROR(lock, "lock callback timer expired after %lds: "
371 "evicting client at %s ",
372 cfs_time_current_sec()- lock->l_last_activity,
374 lock->l_export->exp_connection->c_peer.nid));
376 /* no needs to take an extra ref on the lock since it was in
377 * the waiting_locks_list and ldlm_add_waiting_lock()
378 * already grabbed a ref */
379 cfs_list_del(&lock->l_pending_chain);
380 cfs_list_add(&lock->l_pending_chain,
381 &expired_lock_thread.elt_expired_locks);
385 if (!cfs_list_empty(&expired_lock_thread.elt_expired_locks)) {
386 if (obd_dump_on_timeout && need_dump)
387 expired_lock_thread.elt_dump = __LINE__;
389 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
393 * Make sure the timer will fire again if we have any locks
396 if (!cfs_list_empty(&waiting_locks_list)) {
397 cfs_time_t timeout_rounded;
398 lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
400 timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
401 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
403 spin_unlock_bh(&waiting_locks_spinlock);
407 * Indicate that we're waiting for a client to call us back cancelling a given
408 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
409 * timer to fire appropriately. (We round up to the next second, to avoid
410 * floods of timer firings during periods of high lock contention and traffic).
411 * As done by ldlm_add_waiting_lock(), the caller must grab a lock reference
412 * if it has been added to the waiting list (1 is returned).
414 * Called with the namespace lock held.
416 static int __ldlm_add_waiting_lock(struct ldlm_lock *lock, int seconds)
419 cfs_time_t timeout_rounded;
421 if (!cfs_list_empty(&lock->l_pending_chain))
424 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
425 OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
428 timeout = cfs_time_shift(seconds);
429 if (likely(cfs_time_after(timeout, lock->l_callback_timeout)))
430 lock->l_callback_timeout = timeout;
432 timeout_rounded = round_timeout(lock->l_callback_timeout);
434 if (cfs_time_before(timeout_rounded,
435 cfs_timer_deadline(&waiting_locks_timer)) ||
436 !cfs_timer_is_armed(&waiting_locks_timer)) {
437 cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
439 /* if the new lock has a shorter timeout than something earlier on
440 the list, we'll wait the longer amount of time; no big deal. */
442 cfs_list_add_tail(&lock->l_pending_chain, &waiting_locks_list);
446 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
449 int timeout = ldlm_get_enq_timeout(lock);
451 /* NB: must be called with hold of lock_res_and_lock() */
452 LASSERT(lock->l_res_locked);
455 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
457 spin_lock_bh(&waiting_locks_spinlock);
458 if (lock->l_destroyed) {
459 static cfs_time_t next;
460 spin_unlock_bh(&waiting_locks_spinlock);
461 LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
462 if (cfs_time_after(cfs_time_current(), next)) {
463 next = cfs_time_shift(14400);
464 libcfs_debug_dumpstack(NULL);
469 ret = __ldlm_add_waiting_lock(lock, timeout);
471 /* grab ref on the lock if it has been added to the
475 spin_unlock_bh(&waiting_locks_spinlock);
478 spin_lock_bh(&lock->l_export->exp_bl_list_lock);
479 if (cfs_list_empty(&lock->l_exp_list))
480 cfs_list_add(&lock->l_exp_list,
481 &lock->l_export->exp_bl_list);
482 spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
485 LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
486 ret == 0 ? "not re-" : "", timeout,
487 AT_OFF ? "off" : "on");
492 * Remove a lock from the pending list, likely because it had its cancellation
493 * callback arrive without incident. This adjusts the lock-timeout timer if
494 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
495 * As done by ldlm_del_waiting_lock(), the caller must release the lock
496 * reference when the lock is removed from any list (1 is returned).
498 * Called with namespace lock held.
500 static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
502 cfs_list_t *list_next;
504 if (cfs_list_empty(&lock->l_pending_chain))
507 list_next = lock->l_pending_chain.next;
508 if (lock->l_pending_chain.prev == &waiting_locks_list) {
509 /* Removing the head of the list, adjust timer. */
510 if (list_next == &waiting_locks_list) {
511 /* No more, just cancel. */
512 cfs_timer_disarm(&waiting_locks_timer);
514 struct ldlm_lock *next;
515 next = cfs_list_entry(list_next, struct ldlm_lock,
517 cfs_timer_arm(&waiting_locks_timer,
518 round_timeout(next->l_callback_timeout));
521 cfs_list_del_init(&lock->l_pending_chain);
526 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
530 if (lock->l_export == NULL) {
531 /* We don't have a "waiting locks list" on clients. */
532 CDEBUG(D_DLMTRACE, "Client lock %p : no-op\n", lock);
536 spin_lock_bh(&waiting_locks_spinlock);
537 ret = __ldlm_del_waiting_lock(lock);
538 spin_unlock_bh(&waiting_locks_spinlock);
540 /* remove the lock out of export blocking list */
541 spin_lock_bh(&lock->l_export->exp_bl_list_lock);
542 cfs_list_del_init(&lock->l_exp_list);
543 spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
546 /* release lock ref if it has indeed been removed
548 LDLM_LOCK_RELEASE(lock);
551 LDLM_DEBUG(lock, "%s", ret == 0 ? "wasn't waiting" : "removed");
554 EXPORT_SYMBOL(ldlm_del_waiting_lock);
559 * Called with namespace lock held.
561 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
563 if (lock->l_export == NULL) {
564 /* We don't have a "waiting locks list" on clients. */
565 LDLM_DEBUG(lock, "client lock: no-op");
569 spin_lock_bh(&waiting_locks_spinlock);
571 if (cfs_list_empty(&lock->l_pending_chain)) {
572 spin_unlock_bh(&waiting_locks_spinlock);
573 LDLM_DEBUG(lock, "wasn't waiting");
577 /* we remove/add the lock to the waiting list, so no needs to
578 * release/take a lock reference */
579 __ldlm_del_waiting_lock(lock);
580 __ldlm_add_waiting_lock(lock, timeout);
581 spin_unlock_bh(&waiting_locks_spinlock);
583 LDLM_DEBUG(lock, "refreshed");
586 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
588 #else /* !HAVE_SERVER_SUPPORT || !__KERNEL__ */
590 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
595 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
600 # ifdef HAVE_SERVER_SUPPORT
601 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
603 LASSERT(lock->l_res_locked);
604 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
609 #endif /* HAVE_SERVER_SUPPORT && __KERNEL__ */
611 #ifdef HAVE_SERVER_SUPPORT
613 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
614 const char *ast_type)
616 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
617 "to a lock %s callback time out: rc %d\n",
618 lock->l_export->exp_obd->obd_name,
619 obd_export_nid2str(lock->l_export), ast_type, rc);
621 if (obd_dump_on_timeout)
622 libcfs_debug_dumplog();
624 spin_lock_bh(&waiting_locks_spinlock);
625 if (__ldlm_del_waiting_lock(lock) == 0)
626 /* the lock was not in any list, grab an extra ref before adding
627 * the lock to the expired list */
629 cfs_list_add(&lock->l_pending_chain,
630 &expired_lock_thread.elt_expired_locks);
631 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
632 spin_unlock_bh(&waiting_locks_spinlock);
634 class_fail_export(lock->l_export);
638 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
639 struct ptlrpc_request *req, int rc,
640 const char *ast_type)
642 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
644 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
645 LASSERT(lock->l_export);
646 if (lock->l_export->exp_libclient) {
647 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
648 " timeout, just cancelling lock", ast_type,
649 libcfs_nid2str(peer.nid));
650 ldlm_lock_cancel(lock);
652 } else if (lock->l_flags & LDLM_FL_CANCEL) {
653 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
654 "cancel was received (AST reply lost?)",
655 ast_type, libcfs_nid2str(peer.nid));
656 ldlm_lock_cancel(lock);
659 ldlm_del_waiting_lock(lock);
660 ldlm_failed_ast(lock, rc, ast_type);
664 struct ldlm_resource *res = lock->l_resource;
665 LDLM_DEBUG(lock, "client (nid %s) returned %d"
666 " from %s AST - normal race",
667 libcfs_nid2str(peer.nid),
669 lustre_msg_get_status(req->rq_repmsg) : -1,
672 /* update lvbo to return proper attributes.
674 ldlm_resource_getref(res);
675 ldlm_res_lvbo_update(res, NULL, 1);
676 ldlm_resource_putref(res);
680 LDLM_ERROR(lock, "client (nid %s) returned %d "
681 "from %s AST", libcfs_nid2str(peer.nid),
682 (req->rq_repmsg != NULL) ?
683 lustre_msg_get_status(req->rq_repmsg) : 0,
686 ldlm_lock_cancel(lock);
687 /* Server-side AST functions are called from ldlm_reprocess_all,
688 * which needs to be told to please restart its reprocessing. */
695 static int ldlm_cb_interpret(const struct lu_env *env,
696 struct ptlrpc_request *req, void *data, int rc)
698 struct ldlm_cb_async_args *ca = data;
699 struct ldlm_lock *lock = ca->ca_lock;
700 struct ldlm_cb_set_arg *arg = ca->ca_set_arg;
703 LASSERT(lock != NULL);
706 case LDLM_GL_CALLBACK:
707 /* Update the LVB from disk if the AST failed
708 * (this is a legal race)
710 * - Glimpse callback of local lock just returns
711 * -ELDLM_NO_LOCK_DATA.
712 * - Glimpse callback of remote lock might return
713 * -ELDLM_NO_LOCK_DATA when inode is cleared. LU-274
715 if (rc == -ELDLM_NO_LOCK_DATA) {
716 LDLM_DEBUG(lock, "lost race - client has a lock but no "
718 ldlm_res_lvbo_update(lock->l_resource, NULL, 1);
719 } else if (rc != 0) {
720 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
722 rc = ldlm_res_lvbo_update(lock->l_resource, req, 1);
725 case LDLM_BL_CALLBACK:
727 rc = ldlm_handle_ast_error(lock, req, rc, "blocking");
729 case LDLM_CP_CALLBACK:
731 rc = ldlm_handle_ast_error(lock, req, rc, "completion");
734 LDLM_ERROR(lock, "invalid opcode for lock callback %d",
739 /* release extra reference taken in ldlm_ast_fini() */
740 LDLM_LOCK_RELEASE(lock);
743 cfs_atomic_inc(&arg->restart);
748 static inline int ldlm_ast_fini(struct ptlrpc_request *req,
749 struct ldlm_cb_set_arg *arg,
750 struct ldlm_lock *lock,
756 if (unlikely(instant_cancel)) {
757 rc = ptl_send_rpc(req, 1);
758 ptlrpc_req_finished(req);
760 cfs_atomic_inc(&arg->restart);
763 ptlrpc_set_add_req(arg->set, req);
770 * Check if there are requests in the export request list which prevent
771 * the lock canceling and make these requests high priority ones.
773 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
775 struct ptlrpc_request *req;
778 if (lock->l_export == NULL) {
779 LDLM_DEBUG(lock, "client lock: no-op");
783 spin_lock_bh(&lock->l_export->exp_rpc_lock);
784 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
786 /* Do not process requests that were not yet added to there
787 * incoming queue or were already removed from there for
789 if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
790 req->rq_ops->hpreq_lock_match &&
791 req->rq_ops->hpreq_lock_match(req, lock))
792 ptlrpc_hpreq_reorder(req);
794 spin_unlock_bh(&lock->l_export->exp_rpc_lock);
799 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
800 * enqueued server lock conflicts with given one.
802 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
803 * to wait for client response.
805 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
806 struct ldlm_lock_desc *desc,
807 void *data, int flag)
809 struct ldlm_cb_async_args *ca;
810 struct ldlm_cb_set_arg *arg = data;
811 struct ldlm_request *body;
812 struct ptlrpc_request *req;
813 int instant_cancel = 0;
817 if (flag == LDLM_CB_CANCELING)
818 /* Don't need to do anything here. */
822 LASSERT(data != NULL);
823 if (lock->l_export->exp_obd->obd_recovering != 0)
824 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
826 ldlm_lock_reorder_req(lock);
828 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
829 &RQF_LDLM_BL_CALLBACK,
830 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
834 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
835 ca = ptlrpc_req_async_args(req);
836 ca->ca_set_arg = arg;
839 req->rq_interpret_reply = ldlm_cb_interpret;
840 req->rq_no_resend = 1;
842 lock_res_and_lock(lock);
843 if (lock->l_granted_mode != lock->l_req_mode) {
844 /* this blocking AST will be communicated as part of the
845 * completion AST instead */
846 unlock_res_and_lock(lock);
848 ptlrpc_req_finished(req);
849 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
853 if (lock->l_destroyed) {
854 /* What's the point? */
855 unlock_res_and_lock(lock);
856 ptlrpc_req_finished(req);
860 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
863 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
864 body->lock_handle[0] = lock->l_remote_handle;
865 body->lock_desc = *desc;
866 body->lock_flags |= ldlm_flags_to_wire(lock->l_flags & LDLM_AST_FLAGS);
868 LDLM_DEBUG(lock, "server preparing blocking AST");
870 ptlrpc_request_set_replen(req);
871 if (instant_cancel) {
872 unlock_res_and_lock(lock);
873 ldlm_lock_cancel(lock);
875 LASSERT(lock->l_granted_mode == lock->l_req_mode);
876 ldlm_add_waiting_lock(lock);
877 unlock_res_and_lock(lock);
880 req->rq_send_state = LUSTRE_IMP_FULL;
881 /* ptlrpc_request_alloc_pack already set timeout */
883 req->rq_timeout = ldlm_get_rq_timeout();
885 if (lock->l_export && lock->l_export->exp_nid_stats &&
886 lock->l_export->exp_nid_stats->nid_ldlm_stats)
887 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
888 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
890 rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
894 EXPORT_SYMBOL(ldlm_server_blocking_ast);
896 int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
898 struct ldlm_cb_set_arg *arg = data;
899 struct ldlm_request *body;
900 struct ptlrpc_request *req;
901 struct ldlm_cb_async_args *ca;
902 long total_enqueue_wait;
903 int instant_cancel = 0;
908 LASSERT(lock != NULL);
909 LASSERT(data != NULL);
911 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
912 lock->l_last_activity);
914 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
915 &RQF_LDLM_CP_CALLBACK);
919 /* server namespace, doesn't need lock */
920 lvb_len = ldlm_lvbo_size(lock);
921 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT, lvb_len);
922 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
924 ptlrpc_request_free(req);
928 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
929 ca = ptlrpc_req_async_args(req);
930 ca->ca_set_arg = arg;
933 req->rq_interpret_reply = ldlm_cb_interpret;
934 req->rq_no_resend = 1;
935 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
937 body->lock_handle[0] = lock->l_remote_handle;
938 body->lock_flags = ldlm_flags_to_wire(flags);
939 ldlm_lock2desc(lock, &body->lock_desc);
941 void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
943 lvb_len = ldlm_lvbo_fill(lock, lvb, lvb_len);
944 req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB,
945 lvb_len, RCL_CLIENT);
948 LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)",
951 /* Server-side enqueue wait time estimate, used in
952 __ldlm_add_waiting_lock to set future enqueue timers */
953 if (total_enqueue_wait < ldlm_get_enq_timeout(lock))
954 at_measured(ldlm_lock_to_ns_at(lock),
957 /* bz18618. Don't add lock enqueue time we spend waiting for a
958 previous callback to fail. Locks waiting legitimately will
959 get extended by ldlm_refresh_waiting_lock regardless of the
960 estimate, so it's okay to underestimate here. */
961 LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. "
962 "It is likely that a previous callback timed out.",
964 at_get(ldlm_lock_to_ns_at(lock)));
966 ptlrpc_request_set_replen(req);
968 req->rq_send_state = LUSTRE_IMP_FULL;
969 /* ptlrpc_request_pack already set timeout */
971 req->rq_timeout = ldlm_get_rq_timeout();
973 /* We only send real blocking ASTs after the lock is granted */
974 lock_res_and_lock(lock);
975 if (lock->l_flags & LDLM_FL_AST_SENT) {
976 body->lock_flags |= ldlm_flags_to_wire(LDLM_FL_AST_SENT);
977 /* copy ast flags like LDLM_FL_DISCARD_DATA */
978 body->lock_flags |= ldlm_flags_to_wire(lock->l_flags &
981 /* We might get here prior to ldlm_handle_enqueue setting
982 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
983 * into waiting list, but this is safe and similar code in
984 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
985 * that would not only cancel the lock, but will also remove
986 * it from waiting list */
987 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
988 unlock_res_and_lock(lock);
989 ldlm_lock_cancel(lock);
991 lock_res_and_lock(lock);
993 /* start the lock-timeout clock */
994 ldlm_add_waiting_lock(lock);
997 unlock_res_and_lock(lock);
999 if (lock->l_export && lock->l_export->exp_nid_stats &&
1000 lock->l_export->exp_nid_stats->nid_ldlm_stats)
1001 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
1002 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
1004 rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
1008 EXPORT_SYMBOL(ldlm_server_completion_ast);
1010 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
1012 struct ldlm_cb_set_arg *arg = data;
1013 struct ldlm_request *body;
1014 struct ptlrpc_request *req;
1015 struct ldlm_cb_async_args *ca;
1017 struct req_format *req_fmt;
1020 LASSERT(lock != NULL);
1022 if (arg->gl_desc != NULL)
1023 /* There is a glimpse descriptor to pack */
1024 req_fmt = &RQF_LDLM_GL_DESC_CALLBACK;
1026 req_fmt = &RQF_LDLM_GL_CALLBACK;
1028 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
1029 req_fmt, LUSTRE_DLM_VERSION,
1035 if (arg->gl_desc != NULL) {
1036 /* copy the GL descriptor */
1037 union ldlm_gl_desc *desc;
1038 desc = req_capsule_client_get(&req->rq_pill, &RMF_DLM_GL_DESC);
1039 *desc = *arg->gl_desc;
1042 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1043 body->lock_handle[0] = lock->l_remote_handle;
1044 ldlm_lock2desc(lock, &body->lock_desc);
1046 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
1047 ca = ptlrpc_req_async_args(req);
1048 ca->ca_set_arg = arg;
1051 /* server namespace, doesn't need lock */
1052 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
1053 ldlm_lvbo_size(lock));
1054 ptlrpc_request_set_replen(req);
1056 req->rq_send_state = LUSTRE_IMP_FULL;
1057 /* ptlrpc_request_alloc_pack already set timeout */
1059 req->rq_timeout = ldlm_get_rq_timeout();
1061 req->rq_interpret_reply = ldlm_cb_interpret;
1063 if (lock->l_export && lock->l_export->exp_nid_stats &&
1064 lock->l_export->exp_nid_stats->nid_ldlm_stats)
1065 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
1066 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
1068 rc = ldlm_ast_fini(req, arg, lock, 0);
1072 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
1074 int ldlm_glimpse_locks(struct ldlm_resource *res, cfs_list_t *gl_work_list)
1079 rc = ldlm_run_ast_work(ldlm_res_to_ns(res), gl_work_list,
1081 if (rc == -ERESTART)
1082 ldlm_reprocess_all(res);
1086 EXPORT_SYMBOL(ldlm_glimpse_locks);
1088 /* return ldlm lock associated with a lock callback request */
1089 struct ldlm_lock *ldlm_request_lock(struct ptlrpc_request *req)
1091 struct ldlm_cb_async_args *ca;
1092 struct ldlm_lock *lock;
1095 ca = ptlrpc_req_async_args(req);
1098 RETURN(ERR_PTR(-EFAULT));
1102 EXPORT_SYMBOL(ldlm_request_lock);
1104 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
1105 struct lprocfs_stats *srv_stats)
1107 int lock_type = 0, op = 0;
1109 lock_type = dlm_req->lock_desc.l_resource.lr_type;
1111 switch (lock_type) {
1113 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
1116 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
1117 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
1119 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
1122 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
1125 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
1133 lprocfs_counter_incr(srv_stats, op);
1139 * Main server-side entry point into LDLM. This is called by ptlrpc service
1140 * threads to carry out client lock enqueueing requests.
1142 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1143 struct ptlrpc_request *req,
1144 const struct ldlm_request *dlm_req,
1145 const struct ldlm_callback_suite *cbs)
1147 struct ldlm_reply *dlm_rep;
1149 ldlm_error_t err = ELDLM_OK;
1150 struct ldlm_lock *lock = NULL;
1151 void *cookie = NULL;
1155 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1157 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1158 flags = ldlm_flags_from_wire(dlm_req->lock_flags);
1160 LASSERT(req->rq_export);
1162 if (ptlrpc_req2svc(req)->srv_stats != NULL)
1163 ldlm_svc_get_eopc(dlm_req, ptlrpc_req2svc(req)->srv_stats);
1165 if (req->rq_export && req->rq_export->exp_nid_stats &&
1166 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1167 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1168 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1170 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1171 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1172 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1173 dlm_req->lock_desc.l_resource.lr_type);
1174 GOTO(out, rc = -EFAULT);
1177 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1178 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1179 dlm_req->lock_desc.l_req_mode &
1180 (dlm_req->lock_desc.l_req_mode-1))) {
1181 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1182 dlm_req->lock_desc.l_req_mode);
1183 GOTO(out, rc = -EFAULT);
1186 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1187 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1189 DEBUG_REQ(D_ERROR, req,
1190 "PLAIN lock request from IBITS client?");
1191 GOTO(out, rc = -EPROTO);
1193 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1195 DEBUG_REQ(D_ERROR, req,
1196 "IBITS lock request from unaware client?");
1197 GOTO(out, rc = -EPROTO);
1201 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1202 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1203 ibits for mgc/mgs) */
1205 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1206 * inodebits lock if client does not support them. */
1207 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1208 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1209 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1210 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1211 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1212 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1213 dlm_req->lock_desc.l_req_mode = LCK_CR;
1217 if (unlikely(flags & LDLM_FL_REPLAY)) {
1218 /* Find an existing lock in the per-export lock hash */
1219 /* In the function below, .hs_keycmp resolves to
1220 * ldlm_export_lock_keycmp() */
1221 /* coverity[overrun-buffer-val] */
1222 lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
1223 (void *)&dlm_req->lock_handle[0]);
1225 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1226 LPX64, lock->l_handle.h_cookie);
1227 GOTO(existing_lock, rc = 0);
1231 /* The lock's callback data might be set in the policy function */
1232 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1233 dlm_req->lock_desc.l_resource.lr_type,
1234 dlm_req->lock_desc.l_req_mode,
1235 cbs, NULL, 0, LVB_T_NONE);
1237 GOTO(out, rc = -ENOMEM);
1239 lock->l_last_activity = cfs_time_current_sec();
1240 lock->l_remote_handle = dlm_req->lock_handle[0];
1241 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1243 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1244 /* Don't enqueue a lock onto the export if it is been disonnected
1245 * due to eviction (bug 3822) or server umount (bug 24324).
1246 * Cancel it now instead. */
1247 if (req->rq_export->exp_disconnected) {
1248 LDLM_ERROR(lock, "lock on disconnected export %p",
1250 GOTO(out, rc = -ENOTCONN);
1253 lock->l_export = class_export_lock_get(req->rq_export, lock);
1254 if (lock->l_export->exp_lock_hash)
1255 cfs_hash_add(lock->l_export->exp_lock_hash,
1256 &lock->l_remote_handle,
1261 if (flags & LDLM_FL_HAS_INTENT) {
1262 /* In this case, the reply buffer is allocated deep in
1263 * local_lock_enqueue by the policy function. */
1266 /* based on the assumption that lvb size never changes during
1267 * resource life time otherwise it need resource->lr_lock's
1269 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1270 RCL_SERVER, ldlm_lvbo_size(lock));
1272 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1273 GOTO(out, rc = -ENOMEM);
1275 rc = req_capsule_server_pack(&req->rq_pill);
1280 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1281 ldlm_convert_policy_to_local(req->rq_export,
1282 dlm_req->lock_desc.l_resource.lr_type,
1283 &dlm_req->lock_desc.l_policy_data,
1284 &lock->l_policy_data);
1285 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1286 lock->l_req_extent = lock->l_policy_data.l_extent;
1288 err = ldlm_lock_enqueue(ns, &lock, cookie, &flags);
1292 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1293 dlm_rep->lock_flags = ldlm_flags_to_wire(flags);
1295 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1296 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1298 /* We never send a blocking AST until the lock is granted, but
1299 * we can tell it right now */
1300 lock_res_and_lock(lock);
1302 /* Now take into account flags to be inherited from original lock
1303 request both in reply to client and in our own lock flags. */
1304 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1305 lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags &
1306 LDLM_INHERIT_FLAGS);
1308 /* Don't move a pending lock onto the export if it has already been
1309 * disconnected due to eviction (bug 5683) or server umount (bug 24324).
1310 * Cancel it now instead. */
1311 if (unlikely(req->rq_export->exp_disconnected ||
1312 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1313 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1315 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1316 dlm_rep->lock_flags |= ldlm_flags_to_wire(LDLM_FL_AST_SENT);
1317 if (lock->l_granted_mode == lock->l_req_mode) {
1319 * Only cancel lock if it was granted, because it would
1320 * be destroyed immediately and would never be granted
1321 * in the future, causing timeouts on client. Not
1322 * granted lock will be cancelled immediately after
1323 * sending completion AST.
1325 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1326 unlock_res_and_lock(lock);
1327 ldlm_lock_cancel(lock);
1328 lock_res_and_lock(lock);
1330 ldlm_add_waiting_lock(lock);
1333 /* Make sure we never ever grant usual metadata locks to liblustre
1335 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1336 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1337 req->rq_export->exp_libclient) {
1338 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1339 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1340 CERROR("Granting sync lock to libclient. "
1341 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1342 dlm_req->lock_flags, dlm_rep->lock_flags,
1344 LDLM_ERROR(lock, "sync lock");
1345 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1346 struct ldlm_intent *it;
1348 it = req_capsule_client_get(&req->rq_pill,
1351 CERROR("This is intent %s ("LPU64")\n",
1352 ldlm_it2str(it->opc), it->opc);
1358 unlock_res_and_lock(lock);
1362 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1363 if (!req->rq_packed_final) {
1364 err = lustre_pack_reply(req, 1, NULL, NULL);
1369 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1370 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1372 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1373 "(err=%d, rc=%d)", err, rc);
1376 int lvb_len = ldlm_lvbo_size(lock);
1382 buf = req_capsule_server_get(&req->rq_pill,
1384 LASSERTF(buf != NULL, "req %p, lock %p\n",
1386 buflen = req_capsule_get_size(&req->rq_pill,
1387 &RMF_DLM_LVB, RCL_SERVER);
1388 buflen = ldlm_lvbo_fill(lock, buf, buflen);
1389 req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB,
1390 buflen, RCL_SERVER);
1393 lock_res_and_lock(lock);
1394 ldlm_resource_unlink_lock(lock);
1395 ldlm_lock_destroy_nolock(lock);
1396 unlock_res_and_lock(lock);
1399 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1400 ldlm_reprocess_all(lock->l_resource);
1402 LDLM_LOCK_RELEASE(lock);
1405 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1410 EXPORT_SYMBOL(ldlm_handle_enqueue0);
1412 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1413 ldlm_completion_callback completion_callback,
1414 ldlm_blocking_callback blocking_callback,
1415 ldlm_glimpse_callback glimpse_callback)
1417 struct ldlm_request *dlm_req;
1418 struct ldlm_callback_suite cbs = {
1419 .lcs_completion = completion_callback,
1420 .lcs_blocking = blocking_callback,
1421 .lcs_glimpse = glimpse_callback
1425 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1426 if (dlm_req != NULL) {
1427 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1428 req, dlm_req, &cbs);
1434 EXPORT_SYMBOL(ldlm_handle_enqueue);
1436 int ldlm_handle_convert0(struct ptlrpc_request *req,
1437 const struct ldlm_request *dlm_req)
1439 struct ldlm_reply *dlm_rep;
1440 struct ldlm_lock *lock;
1444 if (req->rq_export && req->rq_export->exp_nid_stats &&
1445 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1446 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1447 LDLM_CONVERT - LDLM_FIRST_OPC);
1449 rc = req_capsule_server_pack(&req->rq_pill);
1453 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1454 dlm_rep->lock_flags = dlm_req->lock_flags;
1456 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1458 req->rq_status = EINVAL;
1462 LDLM_DEBUG(lock, "server-side convert handler START");
1464 lock->l_last_activity = cfs_time_current_sec();
1465 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1466 &dlm_rep->lock_flags);
1468 if (ldlm_del_waiting_lock(lock))
1469 LDLM_DEBUG(lock, "converted waiting lock");
1472 req->rq_status = EDEADLOCK;
1477 if (!req->rq_status)
1478 ldlm_reprocess_all(lock->l_resource);
1479 LDLM_DEBUG(lock, "server-side convert handler END");
1480 LDLM_LOCK_PUT(lock);
1482 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1486 EXPORT_SYMBOL(ldlm_handle_convert0);
1488 int ldlm_handle_convert(struct ptlrpc_request *req)
1491 struct ldlm_request *dlm_req;
1493 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1494 if (dlm_req != NULL) {
1495 rc = ldlm_handle_convert0(req, dlm_req);
1497 CERROR ("Can't unpack dlm_req\n");
1502 EXPORT_SYMBOL(ldlm_handle_convert);
1504 /* Cancel all the locks whos handles are packed into ldlm_request */
1505 int ldlm_request_cancel(struct ptlrpc_request *req,
1506 const struct ldlm_request *dlm_req, int first)
1508 struct ldlm_resource *res, *pres = NULL;
1509 struct ldlm_lock *lock;
1510 int i, count, done = 0;
1513 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1517 if (count == 1 && dlm_req->lock_handle[0].cookie == 0)
1520 /* There is no lock on the server at the replay time,
1521 * skip lock cancelling to make replay tests to pass. */
1522 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1525 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1526 "starting at %d", count, first);
1528 for (i = first; i < count; i++) {
1529 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1531 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1532 "lock (cookie "LPU64")",
1533 dlm_req->lock_handle[i].cookie);
1537 res = lock->l_resource;
1542 ldlm_reprocess_all(pres);
1543 LDLM_RESOURCE_DELREF(pres);
1544 ldlm_resource_putref(pres);
1547 ldlm_resource_getref(res);
1548 LDLM_RESOURCE_ADDREF(res);
1549 ldlm_res_lvbo_update(res, NULL, 1);
1553 ldlm_lock_cancel(lock);
1554 LDLM_LOCK_PUT(lock);
1557 ldlm_reprocess_all(pres);
1558 LDLM_RESOURCE_DELREF(pres);
1559 ldlm_resource_putref(pres);
1561 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1564 EXPORT_SYMBOL(ldlm_request_cancel);
1566 int ldlm_handle_cancel(struct ptlrpc_request *req)
1568 struct ldlm_request *dlm_req;
1572 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1573 if (dlm_req == NULL) {
1574 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1578 if (req->rq_export && req->rq_export->exp_nid_stats &&
1579 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1580 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1581 LDLM_CANCEL - LDLM_FIRST_OPC);
1583 rc = req_capsule_server_pack(&req->rq_pill);
1587 if (!ldlm_request_cancel(req, dlm_req, 0))
1588 req->rq_status = ESTALE;
1590 RETURN(ptlrpc_reply(req));
1592 EXPORT_SYMBOL(ldlm_handle_cancel);
1593 #endif /* HAVE_SERVER_SUPPORT */
1595 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1596 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1601 LDLM_DEBUG(lock, "client blocking AST callback handler");
1603 lock_res_and_lock(lock);
1604 lock->l_flags |= LDLM_FL_CBPENDING;
1606 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1607 lock->l_flags |= LDLM_FL_CANCEL;
1609 do_ast = (!lock->l_readers && !lock->l_writers);
1610 unlock_res_and_lock(lock);
1613 CDEBUG(D_DLMTRACE, "Lock %p already unused, calling callback (%p)\n",
1614 lock, lock->l_blocking_ast);
1615 if (lock->l_blocking_ast != NULL)
1616 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1619 CDEBUG(D_DLMTRACE, "Lock %p is referenced, will be cancelled later\n",
1623 LDLM_DEBUG(lock, "client blocking callback handler END");
1624 LDLM_LOCK_RELEASE(lock);
1628 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1629 struct ldlm_namespace *ns,
1630 struct ldlm_request *dlm_req,
1631 struct ldlm_lock *lock)
1634 CFS_LIST_HEAD(ast_list);
1638 LDLM_DEBUG(lock, "client completion callback handler START");
1640 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1641 int to = cfs_time_seconds(1);
1643 cfs_schedule_timeout_and_set_state(
1644 CFS_TASK_INTERRUPTIBLE, to);
1645 if (lock->l_granted_mode == lock->l_req_mode ||
1651 lvb_len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT);
1653 LDLM_ERROR(lock, "Fail to get lvb_len, rc = %d", lvb_len);
1654 GOTO(out, rc = lvb_len);
1655 } else if (lvb_len > 0) {
1656 if (lock->l_lvb_len > 0) {
1657 /* for extent lock, lvb contains ost_lvb{}. */
1658 LASSERT(lock->l_lvb_data != NULL);
1660 if (unlikely(lock->l_lvb_len < lvb_len)) {
1661 LDLM_ERROR(lock, "Replied LVB is larger than "
1662 "expectation, expected = %d, "
1664 lock->l_lvb_len, lvb_len);
1665 GOTO(out, rc = -EINVAL);
1667 } else { /* for layout lock, lvb has variable length */
1670 OBD_ALLOC(lvb_data, lvb_len);
1671 if (lvb_data == NULL) {
1672 LDLM_ERROR(lock, "No memory.\n");
1673 GOTO(out, rc = -ENOMEM);
1676 lock_res_and_lock(lock);
1677 LASSERT(lock->l_lvb_data == NULL);
1678 lock->l_lvb_data = lvb_data;
1679 lock->l_lvb_len = lvb_len;
1680 unlock_res_and_lock(lock);
1684 lock_res_and_lock(lock);
1685 if (lock->l_destroyed ||
1686 lock->l_granted_mode == lock->l_req_mode) {
1687 /* bug 11300: the lock has already been granted */
1688 unlock_res_and_lock(lock);
1689 LDLM_DEBUG(lock, "Double grant race happened");
1693 /* If we receive the completion AST before the actual enqueue returned,
1694 * then we might need to switch lock modes, resources, or extents. */
1695 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1696 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1697 LDLM_DEBUG(lock, "completion AST, new lock mode");
1700 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1701 ldlm_convert_policy_to_local(req->rq_export,
1702 dlm_req->lock_desc.l_resource.lr_type,
1703 &dlm_req->lock_desc.l_policy_data,
1704 &lock->l_policy_data);
1705 LDLM_DEBUG(lock, "completion AST, new policy data");
1708 ldlm_resource_unlink_lock(lock);
1709 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1710 &lock->l_resource->lr_name,
1711 sizeof(lock->l_resource->lr_name)) != 0) {
1712 unlock_res_and_lock(lock);
1713 rc = ldlm_lock_change_resource(ns, lock,
1714 &dlm_req->lock_desc.l_resource.lr_name);
1716 LDLM_ERROR(lock, "Failed to allocate resource");
1719 LDLM_DEBUG(lock, "completion AST, new resource");
1720 CERROR("change resource!\n");
1721 lock_res_and_lock(lock);
1724 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1725 /* BL_AST locks are not needed in lru.
1726 * let ldlm_cancel_lru() be fast. */
1727 ldlm_lock_remove_from_lru(lock);
1728 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1729 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1732 if (lock->l_lvb_len > 0) {
1733 rc = ldlm_fill_lvb(lock, &req->rq_pill, RCL_CLIENT,
1734 lock->l_lvb_data, lvb_len);
1736 unlock_res_and_lock(lock);
1741 ldlm_grant_lock(lock, &ast_list);
1742 unlock_res_and_lock(lock);
1744 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1746 /* Let Enqueue to call osc_lock_upcall() and initialize
1748 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2);
1750 ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST);
1752 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1758 lock_res_and_lock(lock);
1759 lock->l_flags |= LDLM_FL_FAILED;
1760 unlock_res_and_lock(lock);
1762 LDLM_LOCK_RELEASE(lock);
1765 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1766 struct ldlm_namespace *ns,
1767 struct ldlm_request *dlm_req,
1768 struct ldlm_lock *lock)
1773 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1775 if (lock->l_glimpse_ast != NULL)
1776 rc = lock->l_glimpse_ast(lock, req);
1778 if (req->rq_repmsg != NULL) {
1781 req->rq_status = rc;
1785 lock_res_and_lock(lock);
1786 if (lock->l_granted_mode == LCK_PW &&
1787 !lock->l_readers && !lock->l_writers &&
1788 cfs_time_after(cfs_time_current(),
1789 cfs_time_add(lock->l_last_used,
1790 cfs_time_seconds(10)))) {
1791 unlock_res_and_lock(lock);
1792 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1793 ldlm_handle_bl_callback(ns, NULL, lock);
1798 unlock_res_and_lock(lock);
1799 LDLM_LOCK_RELEASE(lock);
1803 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1805 if (req->rq_no_reply)
1808 req->rq_status = rc;
1809 if (!req->rq_packed_final) {
1810 rc = lustre_pack_reply(req, 1, NULL, NULL);
1814 return ptlrpc_reply(req);
1818 static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
1820 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1823 spin_lock(&blp->blp_lock);
1824 if (blwi->blwi_lock &&
1825 blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
1826 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1827 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1829 /* other blocking callbacks are added to the regular list */
1830 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1832 spin_unlock(&blp->blp_lock);
1834 cfs_waitq_signal(&blp->blp_waitq);
1836 /* can not use blwi->blwi_mode as blwi could be already freed in
1838 if (mode == LDLM_SYNC)
1839 wait_for_completion(&blwi->blwi_comp);
1844 static inline void init_blwi(struct ldlm_bl_work_item *blwi,
1845 struct ldlm_namespace *ns,
1846 struct ldlm_lock_desc *ld,
1847 cfs_list_t *cancels, int count,
1848 struct ldlm_lock *lock,
1851 init_completion(&blwi->blwi_comp);
1852 CFS_INIT_LIST_HEAD(&blwi->blwi_head);
1854 if (cfs_memory_pressure_get())
1855 blwi->blwi_mem_pressure = 1;
1858 blwi->blwi_mode = mode;
1860 blwi->blwi_ld = *ld;
1862 cfs_list_add(&blwi->blwi_head, cancels);
1863 cfs_list_del_init(cancels);
1864 blwi->blwi_count = count;
1866 blwi->blwi_lock = lock;
1870 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1871 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1872 cfs_list_t *cancels, int count, int mode)
1876 if (cancels && count == 0)
1879 if (mode == LDLM_SYNC) {
1880 /* if it is synchronous call do minimum mem alloc, as it could
1881 * be triggered from kernel shrinker
1883 struct ldlm_bl_work_item blwi;
1884 memset(&blwi, 0, sizeof(blwi));
1885 init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
1886 RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
1888 struct ldlm_bl_work_item *blwi;
1889 OBD_ALLOC(blwi, sizeof(*blwi));
1892 init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
1894 RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
1900 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1901 struct ldlm_lock *lock)
1904 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
1910 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1911 cfs_list_t *cancels, int count, int mode)
1914 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
1920 /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
1921 static int ldlm_handle_setinfo(struct ptlrpc_request *req)
1923 struct obd_device *obd = req->rq_export->exp_obd;
1930 DEBUG_REQ(D_HSM, req, "%s: handle setinfo\n", obd->obd_name);
1932 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
1934 key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1936 DEBUG_REQ(D_IOCTL, req, "no set_info key");
1939 keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1941 val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1943 DEBUG_REQ(D_IOCTL, req, "no set_info val");
1946 vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1949 /* We are responsible for swabbing contents of val */
1951 if (KEY_IS(KEY_HSM_COPYTOOL_SEND))
1952 /* Pass it on to mdc (the "export" in this case) */
1953 rc = obd_set_info_async(req->rq_svc_thread->t_env,
1955 sizeof(KEY_HSM_COPYTOOL_SEND),
1956 KEY_HSM_COPYTOOL_SEND,
1959 DEBUG_REQ(D_WARNING, req, "ignoring unknown key %s", key);
1964 static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
1965 const char *msg, int rc,
1966 struct lustre_handle *handle)
1968 DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
1969 "%s: [nid %s] [rc %d] [lock "LPX64"]",
1970 msg, libcfs_id2str(req->rq_peer), rc,
1971 handle ? handle->cookie : 0);
1972 if (req->rq_no_reply)
1973 CWARN("No reply was sent, maybe cause bug 21636.\n");
1975 CWARN("Send reply failed, maybe cause bug 21636.\n");
1978 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1979 static int ldlm_callback_handler(struct ptlrpc_request *req)
1981 struct ldlm_namespace *ns;
1982 struct ldlm_request *dlm_req;
1983 struct ldlm_lock *lock;
1987 /* Requests arrive in sender's byte order. The ptlrpc service
1988 * handler has already checked and, if necessary, byte-swapped the
1989 * incoming request message body, but I am responsible for the
1990 * message buffers. */
1992 /* do nothing for sec context finalize */
1993 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1996 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1998 if (req->rq_export == NULL) {
1999 rc = ldlm_callback_reply(req, -ENOTCONN);
2000 ldlm_callback_errmsg(req, "Operate on unconnected server",
2005 LASSERT(req->rq_export != NULL);
2006 LASSERT(req->rq_export->exp_obd != NULL);
2008 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2009 case LDLM_BL_CALLBACK:
2010 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
2013 case LDLM_CP_CALLBACK:
2014 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK_NET))
2017 case LDLM_GL_CALLBACK:
2018 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK_NET))
2022 rc = ldlm_handle_setinfo(req);
2023 ldlm_callback_reply(req, rc);
2025 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
2026 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
2027 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2028 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2030 rc = llog_origin_handle_cancel(req);
2031 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2033 ldlm_callback_reply(req, rc);
2035 case LLOG_ORIGIN_HANDLE_CREATE:
2036 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
2037 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2039 rc = llog_origin_handle_open(req);
2040 ldlm_callback_reply(req, rc);
2042 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
2043 req_capsule_set(&req->rq_pill,
2044 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
2045 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2047 rc = llog_origin_handle_next_block(req);
2048 ldlm_callback_reply(req, rc);
2050 case LLOG_ORIGIN_HANDLE_READ_HEADER:
2051 req_capsule_set(&req->rq_pill,
2052 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
2053 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2055 rc = llog_origin_handle_read_header(req);
2056 ldlm_callback_reply(req, rc);
2058 case LLOG_ORIGIN_HANDLE_CLOSE:
2059 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2061 rc = llog_origin_handle_close(req);
2062 ldlm_callback_reply(req, rc);
2065 CERROR("unknown opcode %u\n",
2066 lustre_msg_get_opc(req->rq_reqmsg));
2067 ldlm_callback_reply(req, -EPROTO);
2071 ns = req->rq_export->exp_obd->obd_namespace;
2072 LASSERT(ns != NULL);
2074 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2076 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2077 if (dlm_req == NULL) {
2078 rc = ldlm_callback_reply(req, -EPROTO);
2079 ldlm_callback_errmsg(req, "Operate without parameter", rc,
2084 /* Force a known safe race, send a cancel to the server for a lock
2085 * which the server has already started a blocking callback on. */
2086 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
2087 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
2088 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
2090 CERROR("ldlm_cli_cancel: %d\n", rc);
2093 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
2095 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
2096 "disappeared\n", dlm_req->lock_handle[0].cookie);
2097 rc = ldlm_callback_reply(req, -EINVAL);
2098 ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
2099 &dlm_req->lock_handle[0]);
2103 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
2104 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
2105 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
2107 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
2108 lock_res_and_lock(lock);
2109 lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags &
2111 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
2112 /* If somebody cancels lock and cache is already dropped,
2113 * or lock is failed before cp_ast received on client,
2114 * we can tell the server we have no lock. Otherwise, we
2115 * should send cancel after dropping the cache. */
2116 if (((lock->l_flags & LDLM_FL_CANCELING) &&
2117 (lock->l_flags & LDLM_FL_BL_DONE)) ||
2118 (lock->l_flags & LDLM_FL_FAILED)) {
2119 LDLM_DEBUG(lock, "callback on lock "
2120 LPX64" - lock disappeared\n",
2121 dlm_req->lock_handle[0].cookie);
2122 unlock_res_and_lock(lock);
2123 LDLM_LOCK_RELEASE(lock);
2124 rc = ldlm_callback_reply(req, -EINVAL);
2125 ldlm_callback_errmsg(req, "Operate on stale lock", rc,
2126 &dlm_req->lock_handle[0]);
2129 /* BL_AST locks are not needed in lru.
2130 * let ldlm_cancel_lru() be fast. */
2131 ldlm_lock_remove_from_lru(lock);
2132 lock->l_flags |= LDLM_FL_BL_AST;
2134 unlock_res_and_lock(lock);
2136 /* We want the ost thread to get this reply so that it can respond
2137 * to ost requests (write cache writeback) that might be triggered
2140 * But we'd also like to be able to indicate in the reply that we're
2141 * cancelling right now, because it's unused, or have an intent result
2142 * in the reply, so we might have to push the responsibility for sending
2143 * the reply down into the AST handlers, alas. */
2145 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2146 case LDLM_BL_CALLBACK:
2147 CDEBUG(D_INODE, "blocking ast\n");
2148 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
2149 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
2150 rc = ldlm_callback_reply(req, 0);
2151 if (req->rq_no_reply || rc)
2152 ldlm_callback_errmsg(req, "Normal process", rc,
2153 &dlm_req->lock_handle[0]);
2155 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
2156 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
2158 case LDLM_CP_CALLBACK:
2159 CDEBUG(D_INODE, "completion ast\n");
2160 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
2161 ldlm_callback_reply(req, 0);
2162 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
2164 case LDLM_GL_CALLBACK:
2165 CDEBUG(D_INODE, "glimpse ast\n");
2166 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
2167 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
2170 LBUG(); /* checked above */
2176 #ifdef HAVE_SERVER_SUPPORT
2177 static int ldlm_cancel_handler(struct ptlrpc_request *req)
2182 /* Requests arrive in sender's byte order. The ptlrpc service
2183 * handler has already checked and, if necessary, byte-swapped the
2184 * incoming request message body, but I am responsible for the
2185 * message buffers. */
2187 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2189 if (req->rq_export == NULL) {
2190 struct ldlm_request *dlm_req;
2192 CERROR("%s from %s arrived at %lu with bad export cookie "
2194 ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
2195 libcfs_nid2str(req->rq_peer.nid),
2196 req->rq_arrival_time.tv_sec,
2197 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
2199 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_CANCEL) {
2200 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2201 dlm_req = req_capsule_client_get(&req->rq_pill,
2203 if (dlm_req != NULL)
2204 ldlm_lock_dump_handle(D_ERROR,
2205 &dlm_req->lock_handle[0]);
2207 ldlm_callback_reply(req, -ENOTCONN);
2211 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2213 /* XXX FIXME move this back to mds/handler.c, bug 249 */
2215 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2216 CDEBUG(D_INODE, "cancel\n");
2217 if (CFS_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET) ||
2218 CFS_FAIL_CHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))
2220 rc = ldlm_handle_cancel(req);
2224 case OBD_LOG_CANCEL:
2225 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2226 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2228 rc = llog_origin_handle_cancel(req);
2229 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2231 ldlm_callback_reply(req, rc);
2234 CERROR("invalid opcode %d\n",
2235 lustre_msg_get_opc(req->rq_reqmsg));
2236 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2237 ldlm_callback_reply(req, -EINVAL);
2243 static int ldlm_cancel_hpreq_lock_match(struct ptlrpc_request *req,
2244 struct ldlm_lock *lock)
2246 struct ldlm_request *dlm_req;
2247 struct lustre_handle lockh;
2252 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2253 if (dlm_req == NULL)
2256 ldlm_lock2handle(lock, &lockh);
2257 for (i = 0; i < dlm_req->lock_count; i++) {
2258 if (lustre_handle_equal(&dlm_req->lock_handle[i],
2260 DEBUG_REQ(D_RPCTRACE, req,
2261 "Prio raised by lock "LPX64".", lockh.cookie);
2272 static int ldlm_cancel_hpreq_check(struct ptlrpc_request *req)
2274 struct ldlm_request *dlm_req;
2279 /* no prolong in recovery */
2280 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
2283 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2284 if (dlm_req == NULL)
2287 for (i = 0; i < dlm_req->lock_count; i++) {
2288 struct ldlm_lock *lock;
2290 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
2294 rc = !!(lock->l_flags & LDLM_FL_AST_SENT);
2296 LDLM_DEBUG(lock, "hpreq cancel lock");
2297 LDLM_LOCK_PUT(lock);
2306 static struct ptlrpc_hpreq_ops ldlm_cancel_hpreq_ops = {
2307 .hpreq_lock_match = ldlm_cancel_hpreq_lock_match,
2308 .hpreq_check = ldlm_cancel_hpreq_check,
2312 static int ldlm_hpreq_handler(struct ptlrpc_request *req)
2316 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2318 if (req->rq_export == NULL)
2321 if (LDLM_CANCEL == lustre_msg_get_opc(req->rq_reqmsg)) {
2322 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2323 req->rq_ops = &ldlm_cancel_hpreq_ops;
2328 int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2329 cfs_hlist_node_t *hnode, void *data)
2332 cfs_list_t *rpc_list = data;
2333 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2335 lock_res_and_lock(lock);
2337 if (lock->l_req_mode != lock->l_granted_mode) {
2338 unlock_res_and_lock(lock);
2342 LASSERT(lock->l_resource);
2343 if (lock->l_resource->lr_type != LDLM_IBITS &&
2344 lock->l_resource->lr_type != LDLM_PLAIN) {
2345 unlock_res_and_lock(lock);
2349 if (lock->l_flags & LDLM_FL_AST_SENT) {
2350 unlock_res_and_lock(lock);
2354 LASSERT(lock->l_blocking_ast);
2355 LASSERT(!lock->l_blocking_lock);
2357 lock->l_flags |= LDLM_FL_AST_SENT;
2358 if (lock->l_export && lock->l_export->exp_lock_hash) {
2359 /* NB: it's safe to call cfs_hash_del() even lock isn't
2360 * in exp_lock_hash. */
2361 /* In the function below, .hs_keycmp resolves to
2362 * ldlm_export_lock_keycmp() */
2363 /* coverity[overrun-buffer-val] */
2364 cfs_hash_del(lock->l_export->exp_lock_hash,
2365 &lock->l_remote_handle, &lock->l_exp_hash);
2368 cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
2369 LDLM_LOCK_GET(lock);
2371 unlock_res_and_lock(lock);
2375 void ldlm_revoke_export_locks(struct obd_export *exp)
2377 cfs_list_t rpc_list;
2380 CFS_INIT_LIST_HEAD(&rpc_list);
2381 cfs_hash_for_each_empty(exp->exp_lock_hash,
2382 ldlm_revoke_lock_cb, &rpc_list);
2383 ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
2384 LDLM_WORK_REVOKE_AST);
2388 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2389 #endif /* HAVE_SERVER_SUPPORT */
2392 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
2394 struct ldlm_bl_work_item *blwi = NULL;
2395 static unsigned int num_bl = 0;
2397 spin_lock(&blp->blp_lock);
2398 /* process a request from the blp_list at least every blp_num_threads */
2399 if (!cfs_list_empty(&blp->blp_list) &&
2400 (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
2401 blwi = cfs_list_entry(blp->blp_list.next,
2402 struct ldlm_bl_work_item, blwi_entry);
2404 if (!cfs_list_empty(&blp->blp_prio_list))
2405 blwi = cfs_list_entry(blp->blp_prio_list.next,
2406 struct ldlm_bl_work_item,
2410 if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
2412 cfs_list_del(&blwi->blwi_entry);
2414 spin_unlock(&blp->blp_lock);
2419 /* This only contains temporary data until the thread starts */
2420 struct ldlm_bl_thread_data {
2421 char bltd_name[CFS_CURPROC_COMM_MAX];
2422 struct ldlm_bl_pool *bltd_blp;
2423 struct completion bltd_comp;
2427 static int ldlm_bl_thread_main(void *arg);
2429 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2431 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2434 init_completion(&bltd.bltd_comp);
2435 rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
2437 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2438 cfs_atomic_read(&blp->blp_num_threads), rc);
2441 wait_for_completion(&bltd.bltd_comp);
2446 static int ldlm_bl_thread_main(void *arg)
2448 struct ldlm_bl_pool *blp;
2452 struct ldlm_bl_thread_data *bltd = arg;
2454 blp = bltd->bltd_blp;
2457 cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
2458 cfs_atomic_inc(&blp->blp_busy_threads);
2460 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2461 "ldlm_bl_%02d", bltd->bltd_num);
2462 cfs_daemonize(bltd->bltd_name);
2464 complete(&bltd->bltd_comp);
2465 /* cannot use bltd after this, it is only on caller's stack */
2469 struct l_wait_info lwi = { 0 };
2470 struct ldlm_bl_work_item *blwi = NULL;
2473 blwi = ldlm_bl_get_work(blp);
2476 cfs_atomic_dec(&blp->blp_busy_threads);
2477 l_wait_event_exclusive(blp->blp_waitq,
2478 (blwi = ldlm_bl_get_work(blp)) != NULL,
2480 busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
2482 busy = cfs_atomic_read(&blp->blp_busy_threads);
2485 if (blwi->blwi_ns == NULL)
2486 /* added by ldlm_cleanup() */
2489 /* Not fatal if racy and have a few too many threads */
2490 if (unlikely(busy < blp->blp_max_threads &&
2491 busy >= cfs_atomic_read(&blp->blp_num_threads) &&
2492 !blwi->blwi_mem_pressure))
2493 /* discard the return value, we tried */
2494 ldlm_bl_thread_start(blp);
2496 if (blwi->blwi_mem_pressure)
2497 cfs_memory_pressure_set();
2499 if (blwi->blwi_count) {
2501 /* The special case when we cancel locks in lru
2502 * asynchronously, we pass the list of locks here.
2503 * Thus locks are marked LDLM_FL_CANCELING, but NOT
2504 * canceled locally yet. */
2505 count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
2508 ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
2510 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2513 if (blwi->blwi_mem_pressure)
2514 cfs_memory_pressure_clr();
2516 if (blwi->blwi_mode == LDLM_ASYNC)
2517 OBD_FREE(blwi, sizeof(*blwi));
2519 complete(&blwi->blwi_comp);
2522 cfs_atomic_dec(&blp->blp_busy_threads);
2523 cfs_atomic_dec(&blp->blp_num_threads);
2524 complete(&blp->blp_comp);
2530 static int ldlm_setup(void);
2531 static int ldlm_cleanup(void);
2533 int ldlm_get_ref(void)
2537 mutex_lock(&ldlm_ref_mutex);
2538 if (++ldlm_refcount == 1) {
2543 mutex_unlock(&ldlm_ref_mutex);
2547 EXPORT_SYMBOL(ldlm_get_ref);
2549 void ldlm_put_ref(void)
2552 mutex_lock(&ldlm_ref_mutex);
2553 if (ldlm_refcount == 1) {
2554 int rc = ldlm_cleanup();
2556 CERROR("ldlm_cleanup failed: %d\n", rc);
2562 mutex_unlock(&ldlm_ref_mutex);
2566 EXPORT_SYMBOL(ldlm_put_ref);
2569 * Export handle<->lock hash operations.
2572 ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2574 return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2578 ldlm_export_lock_key(cfs_hlist_node_t *hnode)
2580 struct ldlm_lock *lock;
2582 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2583 return &lock->l_remote_handle;
2587 ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
2589 struct ldlm_lock *lock;
2591 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2592 lock->l_remote_handle = *(struct lustre_handle *)key;
2596 ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
2598 return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
2602 ldlm_export_lock_object(cfs_hlist_node_t *hnode)
2604 return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2608 ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2610 struct ldlm_lock *lock;
2612 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2613 LDLM_LOCK_GET(lock);
2617 ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2619 struct ldlm_lock *lock;
2621 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2622 LDLM_LOCK_RELEASE(lock);
2625 static cfs_hash_ops_t ldlm_export_lock_ops = {
2626 .hs_hash = ldlm_export_lock_hash,
2627 .hs_key = ldlm_export_lock_key,
2628 .hs_keycmp = ldlm_export_lock_keycmp,
2629 .hs_keycpy = ldlm_export_lock_keycpy,
2630 .hs_object = ldlm_export_lock_object,
2631 .hs_get = ldlm_export_lock_get,
2632 .hs_put = ldlm_export_lock_put,
2633 .hs_put_locked = ldlm_export_lock_put,
2636 int ldlm_init_export(struct obd_export *exp)
2640 exp->exp_lock_hash =
2641 cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
2642 HASH_EXP_LOCK_CUR_BITS,
2643 HASH_EXP_LOCK_MAX_BITS,
2644 HASH_EXP_LOCK_BKT_BITS, 0,
2645 CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
2646 &ldlm_export_lock_ops,
2647 CFS_HASH_DEFAULT | CFS_HASH_REHASH_KEY |
2648 CFS_HASH_NBLK_CHANGE);
2650 if (!exp->exp_lock_hash)
2655 EXPORT_SYMBOL(ldlm_init_export);
2657 void ldlm_destroy_export(struct obd_export *exp)
2660 cfs_hash_putref(exp->exp_lock_hash);
2661 exp->exp_lock_hash = NULL;
2663 ldlm_destroy_flock_export(exp);
2666 EXPORT_SYMBOL(ldlm_destroy_export);
2668 static int ldlm_setup(void)
2670 static struct ptlrpc_service_conf conf;
2671 struct ldlm_bl_pool *blp = NULL;
2678 if (ldlm_state != NULL)
2681 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2682 if (ldlm_state == NULL)
2686 rc = ldlm_proc_setup();
2691 memset(&conf, 0, sizeof(conf));
2692 conf = (typeof(conf)) {
2693 .psc_name = "ldlm_cbd",
2694 .psc_watchdog_factor = 2,
2696 .bc_nbufs = LDLM_NBUFS,
2697 .bc_buf_size = LDLM_BUFSIZE,
2698 .bc_req_max_size = LDLM_MAXREQSIZE,
2699 .bc_rep_max_size = LDLM_MAXREPSIZE,
2700 .bc_req_portal = LDLM_CB_REQUEST_PORTAL,
2701 .bc_rep_portal = LDLM_CB_REPLY_PORTAL,
2704 .tc_thr_name = "ldlm_cb",
2705 .tc_thr_factor = LDLM_THR_FACTOR,
2706 .tc_nthrs_init = LDLM_NTHRS_INIT,
2707 .tc_nthrs_base = LDLM_NTHRS_BASE,
2708 .tc_nthrs_max = LDLM_NTHRS_MAX,
2709 .tc_nthrs_user = ldlm_num_threads,
2710 .tc_cpu_affinity = 1,
2711 .tc_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
2714 .cc_pattern = ldlm_cpts,
2717 .so_req_handler = ldlm_callback_handler,
2720 ldlm_state->ldlm_cb_service = \
2721 ptlrpc_register_service(&conf, ldlm_svc_proc_dir);
2722 if (IS_ERR(ldlm_state->ldlm_cb_service)) {
2723 CERROR("failed to start service\n");
2724 rc = PTR_ERR(ldlm_state->ldlm_cb_service);
2725 ldlm_state->ldlm_cb_service = NULL;
2729 #ifdef HAVE_SERVER_SUPPORT
2730 memset(&conf, 0, sizeof(conf));
2731 conf = (typeof(conf)) {
2732 .psc_name = "ldlm_canceld",
2733 .psc_watchdog_factor = 6,
2735 .bc_nbufs = LDLM_NBUFS,
2736 .bc_buf_size = LDLM_BUFSIZE,
2737 .bc_req_max_size = LDLM_MAXREQSIZE,
2738 .bc_rep_max_size = LDLM_MAXREPSIZE,
2739 .bc_req_portal = LDLM_CANCEL_REQUEST_PORTAL,
2740 .bc_rep_portal = LDLM_CANCEL_REPLY_PORTAL,
2744 .tc_thr_name = "ldlm_cn",
2745 .tc_thr_factor = LDLM_THR_FACTOR,
2746 .tc_nthrs_init = LDLM_NTHRS_INIT,
2747 .tc_nthrs_base = LDLM_NTHRS_BASE,
2748 .tc_nthrs_max = LDLM_NTHRS_MAX,
2749 .tc_nthrs_user = ldlm_num_threads,
2750 .tc_cpu_affinity = 1,
2751 .tc_ctx_tags = LCT_MD_THREAD | \
2756 .cc_pattern = ldlm_cpts,
2759 .so_req_handler = ldlm_cancel_handler,
2760 .so_hpreq_handler = ldlm_hpreq_handler,
2763 ldlm_state->ldlm_cancel_service = \
2764 ptlrpc_register_service(&conf, ldlm_svc_proc_dir);
2765 if (IS_ERR(ldlm_state->ldlm_cancel_service)) {
2766 CERROR("failed to start service\n");
2767 rc = PTR_ERR(ldlm_state->ldlm_cancel_service);
2768 ldlm_state->ldlm_cancel_service = NULL;
2773 OBD_ALLOC(blp, sizeof(*blp));
2775 GOTO(out, rc = -ENOMEM);
2776 ldlm_state->ldlm_bl_pool = blp;
2778 spin_lock_init(&blp->blp_lock);
2779 CFS_INIT_LIST_HEAD(&blp->blp_list);
2780 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2781 cfs_waitq_init(&blp->blp_waitq);
2782 cfs_atomic_set(&blp->blp_num_threads, 0);
2783 cfs_atomic_set(&blp->blp_busy_threads, 0);
2786 if (ldlm_num_threads == 0) {
2787 blp->blp_min_threads = LDLM_NTHRS_INIT;
2788 blp->blp_max_threads = LDLM_NTHRS_MAX;
2790 blp->blp_min_threads = blp->blp_max_threads = \
2791 min_t(int, LDLM_NTHRS_MAX, max_t(int, LDLM_NTHRS_INIT,
2795 for (i = 0; i < blp->blp_min_threads; i++) {
2796 rc = ldlm_bl_thread_start(blp);
2801 # ifdef HAVE_SERVER_SUPPORT
2802 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2803 expired_lock_thread.elt_state = ELT_STOPPED;
2804 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2806 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2807 spin_lock_init(&waiting_locks_spinlock);
2808 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2810 rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
2812 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2816 cfs_wait_event(expired_lock_thread.elt_waitq,
2817 expired_lock_thread.elt_state == ELT_READY);
2818 # endif /* HAVE_SERVER_SUPPORT */
2820 rc = ldlm_pools_init();
2822 CERROR("Failed to initialize LDLM pools: %d\n", rc);
2833 static int ldlm_cleanup(void)
2837 if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2838 !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2839 CERROR("ldlm still has namespaces; clean these up first.\n");
2840 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2841 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2848 if (ldlm_state->ldlm_bl_pool != NULL) {
2849 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2851 while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
2852 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2854 init_completion(&blp->blp_comp);
2856 spin_lock(&blp->blp_lock);
2857 cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2858 cfs_waitq_signal(&blp->blp_waitq);
2859 spin_unlock(&blp->blp_lock);
2861 wait_for_completion(&blp->blp_comp);
2864 OBD_FREE(blp, sizeof(*blp));
2866 #endif /* __KERNEL__ */
2868 if (ldlm_state->ldlm_cb_service != NULL)
2869 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2870 # ifdef HAVE_SERVER_SUPPORT
2871 if (ldlm_state->ldlm_cancel_service != NULL)
2872 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2876 ldlm_proc_cleanup();
2878 # ifdef HAVE_SERVER_SUPPORT
2879 if (expired_lock_thread.elt_state != ELT_STOPPED) {
2880 expired_lock_thread.elt_state = ELT_TERMINATE;
2881 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2882 cfs_wait_event(expired_lock_thread.elt_waitq,
2883 expired_lock_thread.elt_state == ELT_STOPPED);
2886 #endif /* __KERNEL__ */
2888 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2896 mutex_init(&ldlm_ref_mutex);
2897 mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2898 mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2899 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2900 sizeof(struct ldlm_resource), 0,
2901 CFS_SLAB_HWCACHE_ALIGN);
2902 if (ldlm_resource_slab == NULL)
2905 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2906 sizeof(struct ldlm_lock), 0,
2907 CFS_SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU);
2908 if (ldlm_lock_slab == NULL) {
2909 cfs_mem_cache_destroy(ldlm_resource_slab);
2913 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2914 sizeof(struct ldlm_interval),
2915 0, CFS_SLAB_HWCACHE_ALIGN);
2916 if (ldlm_interval_slab == NULL) {
2917 cfs_mem_cache_destroy(ldlm_resource_slab);
2918 cfs_mem_cache_destroy(ldlm_lock_slab);
2921 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2922 class_export_dump_hook = ldlm_dump_export_locks;
2927 void ldlm_exit(void)
2931 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2932 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2933 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2935 /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
2936 * synchronize_rcu() to wait a grace period elapsed, so that
2937 * ldlm_lock_free() get a chance to be called. */
2940 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2941 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2942 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2943 LASSERTF(rc == 0, "couldn't free interval node slab\n");