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 cfs_mutex_t 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
96 cfs_spinlock_t blp_lock;
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 cfs_completion_t 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 cfs_completion_t 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 cfs_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 cfs_spin_lock_bh(&waiting_locks_spinlock);
151 need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks);
152 cfs_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 cfs_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 cfs_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 cfs_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 cfs_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 cfs_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 cfs_spin_lock_bh(&waiting_locks_spinlock);
238 cfs_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 cfs_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 cfs_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 cfs_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 cfs_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 cfs_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 cfs_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 cfs_spin_lock_bh(&waiting_locks_spinlock);
458 if (lock->l_destroyed) {
459 static cfs_time_t next;
460 cfs_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 cfs_spin_unlock_bh(&waiting_locks_spinlock);
478 cfs_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 cfs_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 cfs_spin_lock_bh(&waiting_locks_spinlock);
537 ret = __ldlm_del_waiting_lock(lock);
538 cfs_spin_unlock_bh(&waiting_locks_spinlock);
540 /* remove the lock out of export blocking list */
541 cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
542 cfs_list_del_init(&lock->l_exp_list);
543 cfs_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");
558 * Called with namespace lock held.
560 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
562 if (lock->l_export == NULL) {
563 /* We don't have a "waiting locks list" on clients. */
564 LDLM_DEBUG(lock, "client lock: no-op");
568 cfs_spin_lock_bh(&waiting_locks_spinlock);
570 if (cfs_list_empty(&lock->l_pending_chain)) {
571 cfs_spin_unlock_bh(&waiting_locks_spinlock);
572 LDLM_DEBUG(lock, "wasn't waiting");
576 /* we remove/add the lock to the waiting list, so no needs to
577 * release/take a lock reference */
578 __ldlm_del_waiting_lock(lock);
579 __ldlm_add_waiting_lock(lock, timeout);
580 cfs_spin_unlock_bh(&waiting_locks_spinlock);
582 LDLM_DEBUG(lock, "refreshed");
586 #else /* !HAVE_SERVER_SUPPORT || !__KERNEL__ */
588 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
593 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
598 # ifdef HAVE_SERVER_SUPPORT
599 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
601 LASSERT(lock->l_res_locked);
602 LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
607 #endif /* HAVE_SERVER_SUPPORT && __KERNEL__ */
609 #ifdef HAVE_SERVER_SUPPORT
611 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
612 const char *ast_type)
614 LCONSOLE_ERROR_MSG(0x138, "%s: A client on nid %s was evicted due "
615 "to a lock %s callback time out: rc %d\n",
616 lock->l_export->exp_obd->obd_name,
617 obd_export_nid2str(lock->l_export), ast_type, rc);
619 if (obd_dump_on_timeout)
620 libcfs_debug_dumplog();
622 cfs_spin_lock_bh(&waiting_locks_spinlock);
623 if (__ldlm_del_waiting_lock(lock) == 0)
624 /* the lock was not in any list, grab an extra ref before adding
625 * the lock to the expired list */
627 cfs_list_add(&lock->l_pending_chain,
628 &expired_lock_thread.elt_expired_locks);
629 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
630 cfs_spin_unlock_bh(&waiting_locks_spinlock);
632 class_fail_export(lock->l_export);
636 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
637 struct ptlrpc_request *req, int rc,
638 const char *ast_type)
640 lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
642 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
643 LASSERT(lock->l_export);
644 if (lock->l_export->exp_libclient) {
645 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
646 " timeout, just cancelling lock", ast_type,
647 libcfs_nid2str(peer.nid));
648 ldlm_lock_cancel(lock);
650 } else if (lock->l_flags & LDLM_FL_CANCEL) {
651 LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
652 "cancel was received (AST reply lost?)",
653 ast_type, libcfs_nid2str(peer.nid));
654 ldlm_lock_cancel(lock);
657 ldlm_del_waiting_lock(lock);
658 ldlm_failed_ast(lock, rc, ast_type);
662 struct ldlm_resource *res = lock->l_resource;
663 LDLM_DEBUG(lock, "client (nid %s) returned %d"
664 " from %s AST - normal race",
665 libcfs_nid2str(peer.nid),
667 lustre_msg_get_status(req->rq_repmsg) : -1,
670 /* update lvbo to return proper attributes.
672 ldlm_resource_getref(res);
673 ldlm_res_lvbo_update(res, NULL, 1);
674 ldlm_resource_putref(res);
678 LDLM_ERROR(lock, "client (nid %s) returned %d "
679 "from %s AST", libcfs_nid2str(peer.nid),
680 (req->rq_repmsg != NULL) ?
681 lustre_msg_get_status(req->rq_repmsg) : 0,
684 ldlm_lock_cancel(lock);
685 /* Server-side AST functions are called from ldlm_reprocess_all,
686 * which needs to be told to please restart its reprocessing. */
693 static int ldlm_cb_interpret(const struct lu_env *env,
694 struct ptlrpc_request *req, void *data, int rc)
696 struct ldlm_cb_async_args *ca = data;
697 struct ldlm_lock *lock = ca->ca_lock;
698 struct ldlm_cb_set_arg *arg = ca->ca_set_arg;
701 LASSERT(lock != NULL);
704 case LDLM_GL_CALLBACK:
705 /* Update the LVB from disk if the AST failed
706 * (this is a legal race)
708 * - Glimpse callback of local lock just returns
709 * -ELDLM_NO_LOCK_DATA.
710 * - Glimpse callback of remote lock might return
711 * -ELDLM_NO_LOCK_DATA when inode is cleared. LU-274
713 if (rc == -ELDLM_NO_LOCK_DATA) {
714 LDLM_DEBUG(lock, "lost race - client has a lock but no "
716 ldlm_res_lvbo_update(lock->l_resource, NULL, 1);
717 } else if (rc != 0) {
718 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
720 rc = ldlm_res_lvbo_update(lock->l_resource, req, 1);
723 case LDLM_BL_CALLBACK:
725 rc = ldlm_handle_ast_error(lock, req, rc, "blocking");
727 case LDLM_CP_CALLBACK:
729 rc = ldlm_handle_ast_error(lock, req, rc, "completion");
732 LDLM_ERROR(lock, "invalid opcode for lock callback %d",
737 /* release extra reference taken in ldlm_ast_fini() */
738 LDLM_LOCK_RELEASE(lock);
741 cfs_atomic_inc(&arg->restart);
746 static inline int ldlm_ast_fini(struct ptlrpc_request *req,
747 struct ldlm_cb_set_arg *arg,
748 struct ldlm_lock *lock,
754 if (unlikely(instant_cancel)) {
755 rc = ptl_send_rpc(req, 1);
756 ptlrpc_req_finished(req);
758 cfs_atomic_inc(&arg->restart);
761 ptlrpc_set_add_req(arg->set, req);
768 * Check if there are requests in the export request list which prevent
769 * the lock canceling and make these requests high priority ones.
771 static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
773 struct ptlrpc_request *req;
776 if (lock->l_export == NULL) {
777 LDLM_DEBUG(lock, "client lock: no-op");
781 cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
782 cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
784 /* Do not process requests that were not yet added to there
785 * incoming queue or were already removed from there for
787 if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
788 req->rq_ops->hpreq_lock_match &&
789 req->rq_ops->hpreq_lock_match(req, lock))
790 ptlrpc_hpreq_reorder(req);
792 cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
797 * ->l_blocking_ast() method for server-side locks. This is invoked when newly
798 * enqueued server lock conflicts with given one.
800 * Sends blocking ast rpc to the client owning that lock; arms timeout timer
801 * to wait for client response.
803 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
804 struct ldlm_lock_desc *desc,
805 void *data, int flag)
807 struct ldlm_cb_async_args *ca;
808 struct ldlm_cb_set_arg *arg = data;
809 struct ldlm_request *body;
810 struct ptlrpc_request *req;
811 int instant_cancel = 0;
815 if (flag == LDLM_CB_CANCELING)
816 /* Don't need to do anything here. */
820 LASSERT(data != NULL);
821 if (lock->l_export->exp_obd->obd_recovering != 0)
822 LDLM_ERROR(lock, "BUG 6063: lock collide during recovery");
824 ldlm_lock_reorder_req(lock);
826 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
827 &RQF_LDLM_BL_CALLBACK,
828 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK);
832 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
833 ca = ptlrpc_req_async_args(req);
834 ca->ca_set_arg = arg;
837 req->rq_interpret_reply = ldlm_cb_interpret;
838 req->rq_no_resend = 1;
840 lock_res_and_lock(lock);
841 if (lock->l_granted_mode != lock->l_req_mode) {
842 /* this blocking AST will be communicated as part of the
843 * completion AST instead */
844 unlock_res_and_lock(lock);
846 ptlrpc_req_finished(req);
847 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
851 if (lock->l_destroyed) {
852 /* What's the point? */
853 unlock_res_and_lock(lock);
854 ptlrpc_req_finished(req);
858 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
861 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
862 body->lock_handle[0] = lock->l_remote_handle;
863 body->lock_desc = *desc;
864 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
866 LDLM_DEBUG(lock, "server preparing blocking AST");
868 ptlrpc_request_set_replen(req);
869 if (instant_cancel) {
870 unlock_res_and_lock(lock);
871 ldlm_lock_cancel(lock);
873 LASSERT(lock->l_granted_mode == lock->l_req_mode);
874 ldlm_add_waiting_lock(lock);
875 unlock_res_and_lock(lock);
878 req->rq_send_state = LUSTRE_IMP_FULL;
879 /* ptlrpc_request_alloc_pack already set timeout */
881 req->rq_timeout = ldlm_get_rq_timeout();
883 if (lock->l_export && lock->l_export->exp_nid_stats &&
884 lock->l_export->exp_nid_stats->nid_ldlm_stats)
885 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
886 LDLM_BL_CALLBACK - LDLM_FIRST_OPC);
888 rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
893 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
895 struct ldlm_cb_set_arg *arg = data;
896 struct ldlm_request *body;
897 struct ptlrpc_request *req;
898 struct ldlm_cb_async_args *ca;
899 long total_enqueue_wait;
900 int instant_cancel = 0;
905 LASSERT(lock != NULL);
906 LASSERT(data != NULL);
908 total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
909 lock->l_last_activity);
911 req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
912 &RQF_LDLM_CP_CALLBACK);
916 /* server namespace, doesn't need lock */
917 lvb_len = ldlm_lvbo_size(lock);
919 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
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 = 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_FL_AST_SENT;
977 /* copy ast flags like LDLM_FL_DISCARD_DATA */
978 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
980 /* We might get here prior to ldlm_handle_enqueue setting
981 * LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
982 * into waiting list, but this is safe and similar code in
983 * ldlm_handle_enqueue will call ldlm_lock_cancel() still,
984 * that would not only cancel the lock, but will also remove
985 * it from waiting list */
986 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
987 unlock_res_and_lock(lock);
988 ldlm_lock_cancel(lock);
990 lock_res_and_lock(lock);
992 /* start the lock-timeout clock */
993 ldlm_add_waiting_lock(lock);
996 unlock_res_and_lock(lock);
998 if (lock->l_export && lock->l_export->exp_nid_stats &&
999 lock->l_export->exp_nid_stats->nid_ldlm_stats)
1000 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
1001 LDLM_CP_CALLBACK - LDLM_FIRST_OPC);
1003 rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
1008 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
1010 struct ldlm_cb_set_arg *arg = data;
1011 struct ldlm_request *body;
1012 struct ptlrpc_request *req;
1013 struct ldlm_cb_async_args *ca;
1015 struct req_format *req_fmt;
1018 LASSERT(lock != NULL);
1020 if (arg->gl_desc != NULL)
1021 /* There is a glimpse descriptor to pack */
1022 req_fmt = &RQF_LDLM_GL_DESC_CALLBACK;
1024 req_fmt = &RQF_LDLM_GL_CALLBACK;
1026 req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
1027 req_fmt, LUSTRE_DLM_VERSION,
1033 if (arg->gl_desc != NULL) {
1034 /* copy the GL descriptor */
1035 union ldlm_gl_desc *desc;
1036 desc = req_capsule_client_get(&req->rq_pill, &RMF_DLM_GL_DESC);
1037 *desc = *arg->gl_desc;
1040 body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1041 body->lock_handle[0] = lock->l_remote_handle;
1042 ldlm_lock2desc(lock, &body->lock_desc);
1044 CLASSERT(sizeof(*ca) <= sizeof(req->rq_async_args));
1045 ca = ptlrpc_req_async_args(req);
1046 ca->ca_set_arg = arg;
1049 /* server namespace, doesn't need lock */
1050 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
1051 ldlm_lvbo_size(lock));
1052 ptlrpc_request_set_replen(req);
1054 req->rq_send_state = LUSTRE_IMP_FULL;
1055 /* ptlrpc_request_alloc_pack already set timeout */
1057 req->rq_timeout = ldlm_get_rq_timeout();
1059 req->rq_interpret_reply = ldlm_cb_interpret;
1061 if (lock->l_export && lock->l_export->exp_nid_stats &&
1062 lock->l_export->exp_nid_stats->nid_ldlm_stats)
1063 lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
1064 LDLM_GL_CALLBACK - LDLM_FIRST_OPC);
1066 rc = ldlm_ast_fini(req, arg, lock, 0);
1071 int ldlm_glimpse_locks(struct ldlm_resource *res, cfs_list_t *gl_work_list)
1076 rc = ldlm_run_ast_work(ldlm_res_to_ns(res), gl_work_list,
1078 if (rc == -ERESTART)
1079 ldlm_reprocess_all(res);
1084 /* return ldlm lock associated with a lock callback request */
1085 struct ldlm_lock *ldlm_request_lock(struct ptlrpc_request *req)
1087 struct ldlm_cb_async_args *ca;
1088 struct ldlm_lock *lock;
1091 ca = ptlrpc_req_async_args(req);
1094 RETURN(ERR_PTR(-EFAULT));
1098 EXPORT_SYMBOL(ldlm_request_lock);
1100 static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
1101 struct lprocfs_stats *srv_stats)
1103 int lock_type = 0, op = 0;
1105 lock_type = dlm_req->lock_desc.l_resource.lr_type;
1107 switch (lock_type) {
1109 op = PTLRPC_LAST_CNTR + LDLM_PLAIN_ENQUEUE;
1112 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT)
1113 op = PTLRPC_LAST_CNTR + LDLM_GLIMPSE_ENQUEUE;
1115 op = PTLRPC_LAST_CNTR + LDLM_EXTENT_ENQUEUE;
1118 op = PTLRPC_LAST_CNTR + LDLM_FLOCK_ENQUEUE;
1121 op = PTLRPC_LAST_CNTR + LDLM_IBITS_ENQUEUE;
1129 lprocfs_counter_incr(srv_stats, op);
1135 * Main server-side entry point into LDLM. This is called by ptlrpc service
1136 * threads to carry out client lock enqueueing requests.
1138 int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
1139 struct ptlrpc_request *req,
1140 const struct ldlm_request *dlm_req,
1141 const struct ldlm_callback_suite *cbs)
1143 struct ldlm_reply *dlm_rep;
1145 ldlm_error_t err = ELDLM_OK;
1146 struct ldlm_lock *lock = NULL;
1147 void *cookie = NULL;
1151 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
1153 ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
1154 flags = dlm_req->lock_flags;
1156 LASSERT(req->rq_export);
1158 if (ptlrpc_req2svc(req)->srv_stats != NULL)
1159 ldlm_svc_get_eopc(dlm_req, ptlrpc_req2svc(req)->srv_stats);
1161 if (req->rq_export && req->rq_export->exp_nid_stats &&
1162 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1163 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1164 LDLM_ENQUEUE - LDLM_FIRST_OPC);
1166 if (unlikely(dlm_req->lock_desc.l_resource.lr_type < LDLM_MIN_TYPE ||
1167 dlm_req->lock_desc.l_resource.lr_type >= LDLM_MAX_TYPE)) {
1168 DEBUG_REQ(D_ERROR, req, "invalid lock request type %d",
1169 dlm_req->lock_desc.l_resource.lr_type);
1170 GOTO(out, rc = -EFAULT);
1173 if (unlikely(dlm_req->lock_desc.l_req_mode <= LCK_MINMODE ||
1174 dlm_req->lock_desc.l_req_mode >= LCK_MAXMODE ||
1175 dlm_req->lock_desc.l_req_mode &
1176 (dlm_req->lock_desc.l_req_mode-1))) {
1177 DEBUG_REQ(D_ERROR, req, "invalid lock request mode %d",
1178 dlm_req->lock_desc.l_req_mode);
1179 GOTO(out, rc = -EFAULT);
1182 if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
1183 if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1185 DEBUG_REQ(D_ERROR, req,
1186 "PLAIN lock request from IBITS client?");
1187 GOTO(out, rc = -EPROTO);
1189 } else if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
1191 DEBUG_REQ(D_ERROR, req,
1192 "IBITS lock request from unaware client?");
1193 GOTO(out, rc = -EPROTO);
1197 /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
1198 against server's _CONNECT_SUPPORTED flags? (I don't want to use
1199 ibits for mgc/mgs) */
1201 /* INODEBITS_INTEROP: Perform conversion from plain lock to
1202 * inodebits lock if client does not support them. */
1203 if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
1204 (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
1205 dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
1206 dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
1207 MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
1208 if (dlm_req->lock_desc.l_req_mode == LCK_PR)
1209 dlm_req->lock_desc.l_req_mode = LCK_CR;
1213 if (unlikely(flags & LDLM_FL_REPLAY)) {
1214 /* Find an existing lock in the per-export lock hash */
1215 /* In the function below, .hs_keycmp resolves to
1216 * ldlm_export_lock_keycmp() */
1217 /* coverity[overrun-buffer-val] */
1218 lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
1219 (void *)&dlm_req->lock_handle[0]);
1221 DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
1222 LPX64, lock->l_handle.h_cookie);
1223 GOTO(existing_lock, rc = 0);
1227 /* The lock's callback data might be set in the policy function */
1228 lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
1229 dlm_req->lock_desc.l_resource.lr_type,
1230 dlm_req->lock_desc.l_req_mode,
1234 GOTO(out, rc = -ENOMEM);
1236 lock->l_last_activity = cfs_time_current_sec();
1237 lock->l_remote_handle = dlm_req->lock_handle[0];
1238 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
1240 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
1241 /* Don't enqueue a lock onto the export if it is been disonnected
1242 * due to eviction (bug 3822) or server umount (bug 24324).
1243 * Cancel it now instead. */
1244 if (req->rq_export->exp_disconnected) {
1245 LDLM_ERROR(lock, "lock on disconnected export %p",
1247 GOTO(out, rc = -ENOTCONN);
1250 lock->l_export = class_export_lock_get(req->rq_export, lock);
1251 if (lock->l_export->exp_lock_hash)
1252 cfs_hash_add(lock->l_export->exp_lock_hash,
1253 &lock->l_remote_handle,
1258 if (flags & LDLM_FL_HAS_INTENT) {
1259 /* In this case, the reply buffer is allocated deep in
1260 * local_lock_enqueue by the policy function. */
1263 /* based on the assumption that lvb size never changes during
1264 * resource life time otherwise it need resource->lr_lock's
1266 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
1267 RCL_SERVER, ldlm_lvbo_size(lock));
1269 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
1270 GOTO(out, rc = -ENOMEM);
1272 rc = req_capsule_server_pack(&req->rq_pill);
1277 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
1278 ldlm_convert_policy_to_local(req->rq_export,
1279 dlm_req->lock_desc.l_resource.lr_type,
1280 &dlm_req->lock_desc.l_policy_data,
1281 &lock->l_policy_data);
1282 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
1283 lock->l_req_extent = lock->l_policy_data.l_extent;
1285 err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
1289 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1290 dlm_rep->lock_flags = flags;
1292 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
1293 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
1295 /* We never send a blocking AST until the lock is granted, but
1296 * we can tell it right now */
1297 lock_res_and_lock(lock);
1299 /* Now take into account flags to be inherited from original lock
1300 request both in reply to client and in our own lock flags. */
1301 dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1302 lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
1304 /* Don't move a pending lock onto the export if it has already been
1305 * disconnected due to eviction (bug 5683) or server umount (bug 24324).
1306 * Cancel it now instead. */
1307 if (unlikely(req->rq_export->exp_disconnected ||
1308 OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
1309 LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
1311 } else if (lock->l_flags & LDLM_FL_AST_SENT) {
1312 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
1313 if (lock->l_granted_mode == lock->l_req_mode) {
1315 * Only cancel lock if it was granted, because it would
1316 * be destroyed immediately and would never be granted
1317 * in the future, causing timeouts on client. Not
1318 * granted lock will be cancelled immediately after
1319 * sending completion AST.
1321 if (dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK) {
1322 unlock_res_and_lock(lock);
1323 ldlm_lock_cancel(lock);
1324 lock_res_and_lock(lock);
1326 ldlm_add_waiting_lock(lock);
1329 /* Make sure we never ever grant usual metadata locks to liblustre
1331 if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
1332 dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
1333 req->rq_export->exp_libclient) {
1334 if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
1335 !(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
1336 CERROR("Granting sync lock to libclient. "
1337 "req fl %d, rep fl %d, lock fl "LPX64"\n",
1338 dlm_req->lock_flags, dlm_rep->lock_flags,
1340 LDLM_ERROR(lock, "sync lock");
1341 if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
1342 struct ldlm_intent *it;
1344 it = req_capsule_client_get(&req->rq_pill,
1347 CERROR("This is intent %s ("LPU64")\n",
1348 ldlm_it2str(it->opc), it->opc);
1354 unlock_res_and_lock(lock);
1358 req->rq_status = rc ?: err; /* return either error - bug 11190 */
1359 if (!req->rq_packed_final) {
1360 err = lustre_pack_reply(req, 1, NULL, NULL);
1365 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
1366 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
1368 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
1369 "(err=%d, rc=%d)", err, rc);
1372 int lvb_len = ldlm_lvbo_size(lock);
1378 buf = req_capsule_server_get(&req->rq_pill,
1380 LASSERTF(buf != NULL, "req %p, lock %p\n",
1382 buflen = req_capsule_get_size(&req->rq_pill,
1383 &RMF_DLM_LVB, RCL_SERVER);
1384 buflen = ldlm_lvbo_fill(lock, buf, buflen);
1385 req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB,
1386 buflen, RCL_SERVER);
1389 lock_res_and_lock(lock);
1390 ldlm_resource_unlink_lock(lock);
1391 ldlm_lock_destroy_nolock(lock);
1392 unlock_res_and_lock(lock);
1395 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
1396 ldlm_reprocess_all(lock->l_resource);
1398 LDLM_LOCK_RELEASE(lock);
1401 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
1407 int ldlm_handle_enqueue(struct ptlrpc_request *req,
1408 ldlm_completion_callback completion_callback,
1409 ldlm_blocking_callback blocking_callback,
1410 ldlm_glimpse_callback glimpse_callback)
1412 struct ldlm_request *dlm_req;
1413 struct ldlm_callback_suite cbs = {
1414 .lcs_completion = completion_callback,
1415 .lcs_blocking = blocking_callback,
1416 .lcs_glimpse = glimpse_callback
1420 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1421 if (dlm_req != NULL) {
1422 rc = ldlm_handle_enqueue0(req->rq_export->exp_obd->obd_namespace,
1423 req, dlm_req, &cbs);
1430 int ldlm_handle_convert0(struct ptlrpc_request *req,
1431 const struct ldlm_request *dlm_req)
1433 struct ldlm_reply *dlm_rep;
1434 struct ldlm_lock *lock;
1438 if (req->rq_export && req->rq_export->exp_nid_stats &&
1439 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1440 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1441 LDLM_CONVERT - LDLM_FIRST_OPC);
1443 rc = req_capsule_server_pack(&req->rq_pill);
1447 dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1448 dlm_rep->lock_flags = dlm_req->lock_flags;
1450 lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
1452 req->rq_status = EINVAL;
1456 LDLM_DEBUG(lock, "server-side convert handler START");
1458 lock->l_last_activity = cfs_time_current_sec();
1459 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
1460 &dlm_rep->lock_flags);
1462 if (ldlm_del_waiting_lock(lock))
1463 LDLM_DEBUG(lock, "converted waiting lock");
1466 req->rq_status = EDEADLOCK;
1471 if (!req->rq_status)
1472 ldlm_reprocess_all(lock->l_resource);
1473 LDLM_DEBUG(lock, "server-side convert handler END");
1474 LDLM_LOCK_PUT(lock);
1476 LDLM_DEBUG_NOLOCK("server-side convert handler END");
1481 int ldlm_handle_convert(struct ptlrpc_request *req)
1484 struct ldlm_request *dlm_req;
1486 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1487 if (dlm_req != NULL) {
1488 rc = ldlm_handle_convert0(req, dlm_req);
1490 CERROR ("Can't unpack dlm_req\n");
1496 /* Cancel all the locks whos handles are packed into ldlm_request */
1497 int ldlm_request_cancel(struct ptlrpc_request *req,
1498 const struct ldlm_request *dlm_req, int first)
1500 struct ldlm_resource *res, *pres = NULL;
1501 struct ldlm_lock *lock;
1502 int i, count, done = 0;
1505 count = dlm_req->lock_count ? dlm_req->lock_count : 1;
1509 if (count == 1 && dlm_req->lock_handle[0].cookie == 0)
1512 /* There is no lock on the server at the replay time,
1513 * skip lock cancelling to make replay tests to pass. */
1514 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1517 LDLM_DEBUG_NOLOCK("server-side cancel handler START: %d locks, "
1518 "starting at %d", count, first);
1520 for (i = first; i < count; i++) {
1521 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
1523 LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
1524 "lock (cookie "LPU64")",
1525 dlm_req->lock_handle[i].cookie);
1529 res = lock->l_resource;
1534 ldlm_reprocess_all(pres);
1535 LDLM_RESOURCE_DELREF(pres);
1536 ldlm_resource_putref(pres);
1539 ldlm_resource_getref(res);
1540 LDLM_RESOURCE_ADDREF(res);
1541 ldlm_res_lvbo_update(res, NULL, 1);
1545 ldlm_lock_cancel(lock);
1546 LDLM_LOCK_PUT(lock);
1549 ldlm_reprocess_all(pres);
1550 LDLM_RESOURCE_DELREF(pres);
1551 ldlm_resource_putref(pres);
1553 LDLM_DEBUG_NOLOCK("server-side cancel handler END");
1557 int ldlm_handle_cancel(struct ptlrpc_request *req)
1559 struct ldlm_request *dlm_req;
1563 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
1564 if (dlm_req == NULL) {
1565 CDEBUG(D_INFO, "bad request buffer for cancel\n");
1569 if (req->rq_export && req->rq_export->exp_nid_stats &&
1570 req->rq_export->exp_nid_stats->nid_ldlm_stats)
1571 lprocfs_counter_incr(req->rq_export->exp_nid_stats->nid_ldlm_stats,
1572 LDLM_CANCEL - LDLM_FIRST_OPC);
1574 rc = req_capsule_server_pack(&req->rq_pill);
1578 if (!ldlm_request_cancel(req, dlm_req, 0))
1579 req->rq_status = ESTALE;
1581 RETURN(ptlrpc_reply(req));
1583 #endif /* HAVE_SERVER_SUPPORT */
1585 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
1586 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
1591 LDLM_DEBUG(lock, "client blocking AST callback handler");
1593 lock_res_and_lock(lock);
1594 lock->l_flags |= LDLM_FL_CBPENDING;
1596 if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
1597 lock->l_flags |= LDLM_FL_CANCEL;
1599 do_ast = (!lock->l_readers && !lock->l_writers);
1600 unlock_res_and_lock(lock);
1603 CDEBUG(D_DLMTRACE, "Lock %p already unused, calling callback (%p)\n",
1604 lock, lock->l_blocking_ast);
1605 if (lock->l_blocking_ast != NULL)
1606 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
1609 CDEBUG(D_DLMTRACE, "Lock %p is referenced, will be cancelled later\n",
1613 LDLM_DEBUG(lock, "client blocking callback handler END");
1614 LDLM_LOCK_RELEASE(lock);
1618 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
1619 struct ldlm_namespace *ns,
1620 struct ldlm_request *dlm_req,
1621 struct ldlm_lock *lock)
1624 CFS_LIST_HEAD(ast_list);
1627 LDLM_DEBUG(lock, "client completion callback handler START");
1629 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
1630 int to = cfs_time_seconds(1);
1632 cfs_schedule_timeout_and_set_state(
1633 CFS_TASK_INTERRUPTIBLE, to);
1634 if (lock->l_granted_mode == lock->l_req_mode ||
1640 lvb_len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT);
1642 if (lock->l_lvb_len > 0) {
1643 /* for extent lock, lvb contains ost_lvb{}. */
1644 LASSERT(lock->l_lvb_data != NULL);
1645 LASSERTF(lock->l_lvb_len == lvb_len,
1646 "preallocated %d, actual %d.\n",
1647 lock->l_lvb_len, lvb_len);
1648 } else { /* for layout lock, lvb has variable length */
1651 OBD_ALLOC(lvb_data, lvb_len);
1652 if (lvb_data == NULL)
1653 LDLM_ERROR(lock, "no memory.\n");
1655 lock_res_and_lock(lock);
1656 if (lvb_data == NULL) {
1657 lock->l_flags |= LDLM_FL_FAILED;
1659 LASSERT(lock->l_lvb_data == NULL);
1660 lock->l_lvb_data = lvb_data;
1661 lock->l_lvb_len = lvb_len;
1663 unlock_res_and_lock(lock);
1667 lock_res_and_lock(lock);
1668 if (lock->l_destroyed ||
1669 lock->l_granted_mode == lock->l_req_mode) {
1670 /* bug 11300: the lock has already been granted */
1671 unlock_res_and_lock(lock);
1672 LDLM_DEBUG(lock, "Double grant race happened");
1673 LDLM_LOCK_RELEASE(lock);
1678 /* If we receive the completion AST before the actual enqueue returned,
1679 * then we might need to switch lock modes, resources, or extents. */
1680 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
1681 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
1682 LDLM_DEBUG(lock, "completion AST, new lock mode");
1685 if (lock->l_resource->lr_type != LDLM_PLAIN) {
1686 ldlm_convert_policy_to_local(req->rq_export,
1687 dlm_req->lock_desc.l_resource.lr_type,
1688 &dlm_req->lock_desc.l_policy_data,
1689 &lock->l_policy_data);
1690 LDLM_DEBUG(lock, "completion AST, new policy data");
1693 ldlm_resource_unlink_lock(lock);
1694 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
1695 &lock->l_resource->lr_name,
1696 sizeof(lock->l_resource->lr_name)) != 0) {
1697 unlock_res_and_lock(lock);
1698 if (ldlm_lock_change_resource(ns, lock,
1699 &dlm_req->lock_desc.l_resource.lr_name) != 0) {
1700 LDLM_ERROR(lock, "Failed to allocate resource");
1701 LDLM_LOCK_RELEASE(lock);
1705 LDLM_DEBUG(lock, "completion AST, new resource");
1706 CERROR("change resource!\n");
1707 lock_res_and_lock(lock);
1710 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
1711 /* BL_AST locks are not needed in lru.
1712 * let ldlm_cancel_lru() be fast. */
1713 ldlm_lock_remove_from_lru(lock);
1714 lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
1715 LDLM_DEBUG(lock, "completion AST includes blocking AST");
1718 if (lock->l_lvb_len) {
1719 if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
1720 RCL_CLIENT) < lock->l_lvb_len) {
1721 LDLM_ERROR(lock, "completion AST did not contain "
1724 void *lvb = req_capsule_client_get(&req->rq_pill,
1726 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
1730 ldlm_grant_lock(lock, &ast_list);
1731 unlock_res_and_lock(lock);
1733 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
1735 /* Let Enqueue to call osc_lock_upcall() and initialize
1737 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 2);
1739 ldlm_run_ast_work(ns, &ast_list, LDLM_WORK_CP_AST);
1741 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
1743 LDLM_LOCK_RELEASE(lock);
1747 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
1748 struct ldlm_namespace *ns,
1749 struct ldlm_request *dlm_req,
1750 struct ldlm_lock *lock)
1755 LDLM_DEBUG(lock, "client glimpse AST callback handler");
1757 if (lock->l_glimpse_ast != NULL)
1758 rc = lock->l_glimpse_ast(lock, req);
1760 if (req->rq_repmsg != NULL) {
1763 req->rq_status = rc;
1767 lock_res_and_lock(lock);
1768 if (lock->l_granted_mode == LCK_PW &&
1769 !lock->l_readers && !lock->l_writers &&
1770 cfs_time_after(cfs_time_current(),
1771 cfs_time_add(lock->l_last_used,
1772 cfs_time_seconds(10)))) {
1773 unlock_res_and_lock(lock);
1774 if (ldlm_bl_to_thread_lock(ns, NULL, lock))
1775 ldlm_handle_bl_callback(ns, NULL, lock);
1780 unlock_res_and_lock(lock);
1781 LDLM_LOCK_RELEASE(lock);
1785 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1787 if (req->rq_no_reply)
1790 req->rq_status = rc;
1791 if (!req->rq_packed_final) {
1792 rc = lustre_pack_reply(req, 1, NULL, NULL);
1796 return ptlrpc_reply(req);
1800 static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
1802 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1805 cfs_spin_lock(&blp->blp_lock);
1806 if (blwi->blwi_lock && blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
1807 /* add LDLM_FL_DISCARD_DATA requests to the priority list */
1808 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
1810 /* other blocking callbacks are added to the regular list */
1811 cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1813 cfs_spin_unlock(&blp->blp_lock);
1815 cfs_waitq_signal(&blp->blp_waitq);
1817 /* can not use blwi->blwi_mode as blwi could be already freed in
1819 if (mode == LDLM_SYNC)
1820 cfs_wait_for_completion(&blwi->blwi_comp);
1825 static inline void init_blwi(struct ldlm_bl_work_item *blwi,
1826 struct ldlm_namespace *ns,
1827 struct ldlm_lock_desc *ld,
1828 cfs_list_t *cancels, int count,
1829 struct ldlm_lock *lock,
1832 cfs_init_completion(&blwi->blwi_comp);
1833 CFS_INIT_LIST_HEAD(&blwi->blwi_head);
1835 if (cfs_memory_pressure_get())
1836 blwi->blwi_mem_pressure = 1;
1839 blwi->blwi_mode = mode;
1841 blwi->blwi_ld = *ld;
1843 cfs_list_add(&blwi->blwi_head, cancels);
1844 cfs_list_del_init(cancels);
1845 blwi->blwi_count = count;
1847 blwi->blwi_lock = lock;
1851 static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
1852 struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
1853 cfs_list_t *cancels, int count, int mode)
1857 if (cancels && count == 0)
1860 if (mode == LDLM_SYNC) {
1861 /* if it is synchronous call do minimum mem alloc, as it could
1862 * be triggered from kernel shrinker
1864 struct ldlm_bl_work_item blwi;
1865 memset(&blwi, 0, sizeof(blwi));
1866 init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
1867 RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
1869 struct ldlm_bl_work_item *blwi;
1870 OBD_ALLOC(blwi, sizeof(*blwi));
1873 init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
1875 RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
1881 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1882 struct ldlm_lock *lock)
1885 RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
1891 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1892 cfs_list_t *cancels, int count, int mode)
1895 RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
1901 /* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
1902 static int ldlm_handle_setinfo(struct ptlrpc_request *req)
1904 struct obd_device *obd = req->rq_export->exp_obd;
1911 DEBUG_REQ(D_HSM, req, "%s: handle setinfo\n", obd->obd_name);
1913 req_capsule_set(&req->rq_pill, &RQF_OBD_SET_INFO);
1915 key = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1917 DEBUG_REQ(D_IOCTL, req, "no set_info key");
1920 keylen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_KEY,
1922 val = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1924 DEBUG_REQ(D_IOCTL, req, "no set_info val");
1927 vallen = req_capsule_get_size(&req->rq_pill, &RMF_SETINFO_VAL,
1930 /* We are responsible for swabbing contents of val */
1932 if (KEY_IS(KEY_HSM_COPYTOOL_SEND))
1933 /* Pass it on to mdc (the "export" in this case) */
1934 rc = obd_set_info_async(req->rq_svc_thread->t_env,
1936 sizeof(KEY_HSM_COPYTOOL_SEND),
1937 KEY_HSM_COPYTOOL_SEND,
1940 DEBUG_REQ(D_WARNING, req, "ignoring unknown key %s", key);
1945 static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
1946 const char *msg, int rc,
1947 struct lustre_handle *handle)
1949 DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
1950 "%s: [nid %s] [rc %d] [lock "LPX64"]",
1951 msg, libcfs_id2str(req->rq_peer), rc,
1952 handle ? handle->cookie : 0);
1953 if (req->rq_no_reply)
1954 CWARN("No reply was sent, maybe cause bug 21636.\n");
1956 CWARN("Send reply failed, maybe cause bug 21636.\n");
1959 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
1960 static int ldlm_callback_handler(struct ptlrpc_request *req)
1962 struct ldlm_namespace *ns;
1963 struct ldlm_request *dlm_req;
1964 struct ldlm_lock *lock;
1968 /* Requests arrive in sender's byte order. The ptlrpc service
1969 * handler has already checked and, if necessary, byte-swapped the
1970 * incoming request message body, but I am responsible for the
1971 * message buffers. */
1973 /* do nothing for sec context finalize */
1974 if (lustre_msg_get_opc(req->rq_reqmsg) == SEC_CTX_FINI)
1977 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
1979 if (req->rq_export == NULL) {
1980 rc = ldlm_callback_reply(req, -ENOTCONN);
1981 ldlm_callback_errmsg(req, "Operate on unconnected server",
1986 LASSERT(req->rq_export != NULL);
1987 LASSERT(req->rq_export->exp_obd != NULL);
1989 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
1990 case LDLM_BL_CALLBACK:
1991 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET))
1994 case LDLM_CP_CALLBACK:
1995 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK_NET))
1998 case LDLM_GL_CALLBACK:
1999 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK_NET))
2003 rc = ldlm_handle_setinfo(req);
2004 ldlm_callback_reply(req, rc);
2006 case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
2007 CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
2008 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2009 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2011 rc = llog_origin_handle_cancel(req);
2012 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2014 ldlm_callback_reply(req, rc);
2016 case LLOG_ORIGIN_HANDLE_CREATE:
2017 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
2018 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2020 rc = llog_origin_handle_open(req);
2021 ldlm_callback_reply(req, rc);
2023 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
2024 req_capsule_set(&req->rq_pill,
2025 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
2026 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2028 rc = llog_origin_handle_next_block(req);
2029 ldlm_callback_reply(req, rc);
2031 case LLOG_ORIGIN_HANDLE_READ_HEADER:
2032 req_capsule_set(&req->rq_pill,
2033 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
2034 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2036 rc = llog_origin_handle_read_header(req);
2037 ldlm_callback_reply(req, rc);
2039 case LLOG_ORIGIN_HANDLE_CLOSE:
2040 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
2042 rc = llog_origin_handle_close(req);
2043 ldlm_callback_reply(req, rc);
2046 CERROR("unknown opcode %u\n",
2047 lustre_msg_get_opc(req->rq_reqmsg));
2048 ldlm_callback_reply(req, -EPROTO);
2052 ns = req->rq_export->exp_obd->obd_namespace;
2053 LASSERT(ns != NULL);
2055 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2057 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2058 if (dlm_req == NULL) {
2059 rc = ldlm_callback_reply(req, -EPROTO);
2060 ldlm_callback_errmsg(req, "Operate without parameter", rc,
2065 /* Force a known safe race, send a cancel to the server for a lock
2066 * which the server has already started a blocking callback on. */
2067 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
2068 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
2069 rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
2071 CERROR("ldlm_cli_cancel: %d\n", rc);
2074 lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
2076 CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
2077 "disappeared\n", dlm_req->lock_handle[0].cookie);
2078 rc = ldlm_callback_reply(req, -EINVAL);
2079 ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
2080 &dlm_req->lock_handle[0]);
2084 if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
2085 lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
2086 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
2088 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
2089 lock_res_and_lock(lock);
2090 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
2091 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
2092 /* If somebody cancels lock and cache is already dropped,
2093 * or lock is failed before cp_ast received on client,
2094 * we can tell the server we have no lock. Otherwise, we
2095 * should send cancel after dropping the cache. */
2096 if (((lock->l_flags & LDLM_FL_CANCELING) &&
2097 (lock->l_flags & LDLM_FL_BL_DONE)) ||
2098 (lock->l_flags & LDLM_FL_FAILED)) {
2099 LDLM_DEBUG(lock, "callback on lock "
2100 LPX64" - lock disappeared\n",
2101 dlm_req->lock_handle[0].cookie);
2102 unlock_res_and_lock(lock);
2103 LDLM_LOCK_RELEASE(lock);
2104 rc = ldlm_callback_reply(req, -EINVAL);
2105 ldlm_callback_errmsg(req, "Operate on stale lock", rc,
2106 &dlm_req->lock_handle[0]);
2109 /* BL_AST locks are not needed in lru.
2110 * let ldlm_cancel_lru() be fast. */
2111 ldlm_lock_remove_from_lru(lock);
2112 lock->l_flags |= LDLM_FL_BL_AST;
2114 unlock_res_and_lock(lock);
2116 /* We want the ost thread to get this reply so that it can respond
2117 * to ost requests (write cache writeback) that might be triggered
2120 * But we'd also like to be able to indicate in the reply that we're
2121 * cancelling right now, because it's unused, or have an intent result
2122 * in the reply, so we might have to push the responsibility for sending
2123 * the reply down into the AST handlers, alas. */
2125 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2126 case LDLM_BL_CALLBACK:
2127 CDEBUG(D_INODE, "blocking ast\n");
2128 req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
2129 if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
2130 rc = ldlm_callback_reply(req, 0);
2131 if (req->rq_no_reply || rc)
2132 ldlm_callback_errmsg(req, "Normal process", rc,
2133 &dlm_req->lock_handle[0]);
2135 if (ldlm_bl_to_thread_lock(ns, &dlm_req->lock_desc, lock))
2136 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
2138 case LDLM_CP_CALLBACK:
2139 CDEBUG(D_INODE, "completion ast\n");
2140 req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
2141 ldlm_callback_reply(req, 0);
2142 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
2144 case LDLM_GL_CALLBACK:
2145 CDEBUG(D_INODE, "glimpse ast\n");
2146 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
2147 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
2150 LBUG(); /* checked above */
2156 #ifdef HAVE_SERVER_SUPPORT
2157 static int ldlm_cancel_handler(struct ptlrpc_request *req)
2162 /* Requests arrive in sender's byte order. The ptlrpc service
2163 * handler has already checked and, if necessary, byte-swapped the
2164 * incoming request message body, but I am responsible for the
2165 * message buffers. */
2167 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2169 if (req->rq_export == NULL) {
2170 struct ldlm_request *dlm_req;
2172 CERROR("%s from %s arrived at %lu with bad export cookie "
2174 ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
2175 libcfs_nid2str(req->rq_peer.nid),
2176 req->rq_arrival_time.tv_sec,
2177 lustre_msg_get_handle(req->rq_reqmsg)->cookie);
2179 if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_CANCEL) {
2180 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2181 dlm_req = req_capsule_client_get(&req->rq_pill,
2183 if (dlm_req != NULL)
2184 ldlm_lock_dump_handle(D_ERROR,
2185 &dlm_req->lock_handle[0]);
2187 ldlm_callback_reply(req, -ENOTCONN);
2191 switch (lustre_msg_get_opc(req->rq_reqmsg)) {
2193 /* XXX FIXME move this back to mds/handler.c, bug 249 */
2195 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2196 CDEBUG(D_INODE, "cancel\n");
2197 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET))
2199 rc = ldlm_handle_cancel(req);
2203 case OBD_LOG_CANCEL:
2204 req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
2205 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
2207 rc = llog_origin_handle_cancel(req);
2208 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
2210 ldlm_callback_reply(req, rc);
2213 CERROR("invalid opcode %d\n",
2214 lustre_msg_get_opc(req->rq_reqmsg));
2215 req_capsule_set(&req->rq_pill, &RQF_LDLM_CALLBACK);
2216 ldlm_callback_reply(req, -EINVAL);
2222 static int ldlm_cancel_hpreq_lock_match(struct ptlrpc_request *req,
2223 struct ldlm_lock *lock)
2225 struct ldlm_request *dlm_req;
2226 struct lustre_handle lockh;
2231 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2232 if (dlm_req == NULL)
2235 ldlm_lock2handle(lock, &lockh);
2236 for (i = 0; i < dlm_req->lock_count; i++) {
2237 if (lustre_handle_equal(&dlm_req->lock_handle[i],
2239 DEBUG_REQ(D_RPCTRACE, req,
2240 "Prio raised by lock "LPX64".", lockh.cookie);
2251 static int ldlm_cancel_hpreq_check(struct ptlrpc_request *req)
2253 struct ldlm_request *dlm_req;
2258 /* no prolong in recovery */
2259 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
2262 dlm_req = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
2263 if (dlm_req == NULL)
2266 for (i = 0; i < dlm_req->lock_count; i++) {
2267 struct ldlm_lock *lock;
2269 lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
2273 rc = !!(lock->l_flags & LDLM_FL_AST_SENT);
2275 LDLM_DEBUG(lock, "hpreq cancel lock");
2276 LDLM_LOCK_PUT(lock);
2285 static struct ptlrpc_hpreq_ops ldlm_cancel_hpreq_ops = {
2286 .hpreq_lock_match = ldlm_cancel_hpreq_lock_match,
2287 .hpreq_check = ldlm_cancel_hpreq_check,
2291 static int ldlm_hpreq_handler(struct ptlrpc_request *req)
2295 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
2297 if (req->rq_export == NULL)
2300 if (LDLM_CANCEL == lustre_msg_get_opc(req->rq_reqmsg)) {
2301 req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
2302 req->rq_ops = &ldlm_cancel_hpreq_ops;
2307 int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2308 cfs_hlist_node_t *hnode, void *data)
2311 cfs_list_t *rpc_list = data;
2312 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2314 lock_res_and_lock(lock);
2316 if (lock->l_req_mode != lock->l_granted_mode) {
2317 unlock_res_and_lock(lock);
2321 LASSERT(lock->l_resource);
2322 if (lock->l_resource->lr_type != LDLM_IBITS &&
2323 lock->l_resource->lr_type != LDLM_PLAIN) {
2324 unlock_res_and_lock(lock);
2328 if (lock->l_flags & LDLM_FL_AST_SENT) {
2329 unlock_res_and_lock(lock);
2333 LASSERT(lock->l_blocking_ast);
2334 LASSERT(!lock->l_blocking_lock);
2336 lock->l_flags |= LDLM_FL_AST_SENT;
2337 if (lock->l_export && lock->l_export->exp_lock_hash) {
2338 /* NB: it's safe to call cfs_hash_del() even lock isn't
2339 * in exp_lock_hash. */
2340 /* In the function below, .hs_keycmp resolves to
2341 * ldlm_export_lock_keycmp() */
2342 /* coverity[overrun-buffer-val] */
2343 cfs_hash_del(lock->l_export->exp_lock_hash,
2344 &lock->l_remote_handle, &lock->l_exp_hash);
2347 cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
2348 LDLM_LOCK_GET(lock);
2350 unlock_res_and_lock(lock);
2354 void ldlm_revoke_export_locks(struct obd_export *exp)
2356 cfs_list_t rpc_list;
2359 CFS_INIT_LIST_HEAD(&rpc_list);
2360 cfs_hash_for_each_empty(exp->exp_lock_hash,
2361 ldlm_revoke_lock_cb, &rpc_list);
2362 ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
2363 LDLM_WORK_REVOKE_AST);
2367 #endif /* HAVE_SERVER_SUPPORT */
2370 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
2372 struct ldlm_bl_work_item *blwi = NULL;
2373 static unsigned int num_bl = 0;
2375 cfs_spin_lock(&blp->blp_lock);
2376 /* process a request from the blp_list at least every blp_num_threads */
2377 if (!cfs_list_empty(&blp->blp_list) &&
2378 (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
2379 blwi = cfs_list_entry(blp->blp_list.next,
2380 struct ldlm_bl_work_item, blwi_entry);
2382 if (!cfs_list_empty(&blp->blp_prio_list))
2383 blwi = cfs_list_entry(blp->blp_prio_list.next,
2384 struct ldlm_bl_work_item,
2388 if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
2390 cfs_list_del(&blwi->blwi_entry);
2392 cfs_spin_unlock(&blp->blp_lock);
2397 /* This only contains temporary data until the thread starts */
2398 struct ldlm_bl_thread_data {
2399 char bltd_name[CFS_CURPROC_COMM_MAX];
2400 struct ldlm_bl_pool *bltd_blp;
2401 cfs_completion_t bltd_comp;
2405 static int ldlm_bl_thread_main(void *arg);
2407 static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
2409 struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
2412 cfs_init_completion(&bltd.bltd_comp);
2413 rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
2415 CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
2416 cfs_atomic_read(&blp->blp_num_threads), rc);
2419 cfs_wait_for_completion(&bltd.bltd_comp);
2424 static int ldlm_bl_thread_main(void *arg)
2426 struct ldlm_bl_pool *blp;
2430 struct ldlm_bl_thread_data *bltd = arg;
2432 blp = bltd->bltd_blp;
2435 cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
2436 cfs_atomic_inc(&blp->blp_busy_threads);
2438 snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
2439 "ldlm_bl_%02d", bltd->bltd_num);
2440 cfs_daemonize(bltd->bltd_name);
2442 cfs_complete(&bltd->bltd_comp);
2443 /* cannot use bltd after this, it is only on caller's stack */
2447 struct l_wait_info lwi = { 0 };
2448 struct ldlm_bl_work_item *blwi = NULL;
2451 blwi = ldlm_bl_get_work(blp);
2454 cfs_atomic_dec(&blp->blp_busy_threads);
2455 l_wait_event_exclusive(blp->blp_waitq,
2456 (blwi = ldlm_bl_get_work(blp)) != NULL,
2458 busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
2460 busy = cfs_atomic_read(&blp->blp_busy_threads);
2463 if (blwi->blwi_ns == NULL)
2464 /* added by ldlm_cleanup() */
2467 /* Not fatal if racy and have a few too many threads */
2468 if (unlikely(busy < blp->blp_max_threads &&
2469 busy >= cfs_atomic_read(&blp->blp_num_threads) &&
2470 !blwi->blwi_mem_pressure))
2471 /* discard the return value, we tried */
2472 ldlm_bl_thread_start(blp);
2474 if (blwi->blwi_mem_pressure)
2475 cfs_memory_pressure_set();
2477 if (blwi->blwi_count) {
2479 /* The special case when we cancel locks in lru
2480 * asynchronously, we pass the list of locks here.
2481 * Thus locks are marked LDLM_FL_CANCELING, but NOT
2482 * canceled locally yet. */
2483 count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
2486 ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
2488 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
2491 if (blwi->blwi_mem_pressure)
2492 cfs_memory_pressure_clr();
2494 if (blwi->blwi_mode == LDLM_ASYNC)
2495 OBD_FREE(blwi, sizeof(*blwi));
2497 cfs_complete(&blwi->blwi_comp);
2500 cfs_atomic_dec(&blp->blp_busy_threads);
2501 cfs_atomic_dec(&blp->blp_num_threads);
2502 cfs_complete(&blp->blp_comp);
2508 static int ldlm_setup(void);
2509 static int ldlm_cleanup(void);
2511 int ldlm_get_ref(void)
2515 cfs_mutex_lock(&ldlm_ref_mutex);
2516 if (++ldlm_refcount == 1) {
2521 cfs_mutex_unlock(&ldlm_ref_mutex);
2526 void ldlm_put_ref(void)
2529 cfs_mutex_lock(&ldlm_ref_mutex);
2530 if (ldlm_refcount == 1) {
2531 int rc = ldlm_cleanup();
2533 CERROR("ldlm_cleanup failed: %d\n", rc);
2539 cfs_mutex_unlock(&ldlm_ref_mutex);
2545 * Export handle<->lock hash operations.
2548 ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
2550 return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
2554 ldlm_export_lock_key(cfs_hlist_node_t *hnode)
2556 struct ldlm_lock *lock;
2558 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2559 return &lock->l_remote_handle;
2563 ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
2565 struct ldlm_lock *lock;
2567 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2568 lock->l_remote_handle = *(struct lustre_handle *)key;
2572 ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
2574 return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
2578 ldlm_export_lock_object(cfs_hlist_node_t *hnode)
2580 return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2584 ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2586 struct ldlm_lock *lock;
2588 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2589 LDLM_LOCK_GET(lock);
2593 ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
2595 struct ldlm_lock *lock;
2597 lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
2598 LDLM_LOCK_RELEASE(lock);
2601 static cfs_hash_ops_t ldlm_export_lock_ops = {
2602 .hs_hash = ldlm_export_lock_hash,
2603 .hs_key = ldlm_export_lock_key,
2604 .hs_keycmp = ldlm_export_lock_keycmp,
2605 .hs_keycpy = ldlm_export_lock_keycpy,
2606 .hs_object = ldlm_export_lock_object,
2607 .hs_get = ldlm_export_lock_get,
2608 .hs_put = ldlm_export_lock_put,
2609 .hs_put_locked = ldlm_export_lock_put,
2612 int ldlm_init_export(struct obd_export *exp)
2616 exp->exp_lock_hash =
2617 cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
2618 HASH_EXP_LOCK_CUR_BITS,
2619 HASH_EXP_LOCK_MAX_BITS,
2620 HASH_EXP_LOCK_BKT_BITS, 0,
2621 CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
2622 &ldlm_export_lock_ops,
2623 CFS_HASH_DEFAULT | CFS_HASH_REHASH_KEY |
2624 CFS_HASH_NBLK_CHANGE);
2626 if (!exp->exp_lock_hash)
2631 EXPORT_SYMBOL(ldlm_init_export);
2633 void ldlm_destroy_export(struct obd_export *exp)
2636 cfs_hash_putref(exp->exp_lock_hash);
2637 exp->exp_lock_hash = NULL;
2639 ldlm_destroy_flock_export(exp);
2642 EXPORT_SYMBOL(ldlm_destroy_export);
2644 static int ldlm_setup(void)
2646 static struct ptlrpc_service_conf conf;
2647 struct ldlm_bl_pool *blp = NULL;
2654 if (ldlm_state != NULL)
2657 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
2658 if (ldlm_state == NULL)
2662 rc = ldlm_proc_setup();
2667 memset(&conf, 0, sizeof(conf));
2668 conf = (typeof(conf)) {
2669 .psc_name = "ldlm_cbd",
2670 .psc_watchdog_factor = 2,
2672 .bc_nbufs = LDLM_NBUFS,
2673 .bc_buf_size = LDLM_BUFSIZE,
2674 .bc_req_max_size = LDLM_MAXREQSIZE,
2675 .bc_rep_max_size = LDLM_MAXREPSIZE,
2676 .bc_req_portal = LDLM_CB_REQUEST_PORTAL,
2677 .bc_rep_portal = LDLM_CB_REPLY_PORTAL,
2680 .tc_thr_name = "ldlm_cb",
2681 .tc_thr_factor = LDLM_THR_FACTOR,
2682 .tc_nthrs_init = LDLM_NTHRS_INIT,
2683 .tc_nthrs_base = LDLM_NTHRS_BASE,
2684 .tc_nthrs_max = LDLM_NTHRS_MAX,
2685 .tc_nthrs_user = ldlm_num_threads,
2686 .tc_cpu_affinity = 1,
2687 .tc_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
2690 .cc_pattern = ldlm_cpts,
2693 .so_req_handler = ldlm_callback_handler,
2696 ldlm_state->ldlm_cb_service = \
2697 ptlrpc_register_service(&conf, ldlm_svc_proc_dir);
2698 if (IS_ERR(ldlm_state->ldlm_cb_service)) {
2699 CERROR("failed to start service\n");
2700 rc = PTR_ERR(ldlm_state->ldlm_cb_service);
2701 ldlm_state->ldlm_cb_service = NULL;
2705 #ifdef HAVE_SERVER_SUPPORT
2706 memset(&conf, 0, sizeof(conf));
2707 conf = (typeof(conf)) {
2708 .psc_name = "ldlm_canceld",
2709 .psc_watchdog_factor = 6,
2711 .bc_nbufs = LDLM_NBUFS,
2712 .bc_buf_size = LDLM_BUFSIZE,
2713 .bc_req_max_size = LDLM_MAXREQSIZE,
2714 .bc_rep_max_size = LDLM_MAXREPSIZE,
2715 .bc_req_portal = LDLM_CANCEL_REQUEST_PORTAL,
2716 .bc_rep_portal = LDLM_CANCEL_REPLY_PORTAL,
2720 .tc_thr_name = "ldlm_cn",
2721 .tc_thr_factor = LDLM_THR_FACTOR,
2722 .tc_nthrs_init = LDLM_NTHRS_INIT,
2723 .tc_nthrs_base = LDLM_NTHRS_BASE,
2724 .tc_nthrs_max = LDLM_NTHRS_MAX,
2725 .tc_nthrs_user = ldlm_num_threads,
2726 .tc_cpu_affinity = 1,
2727 .tc_ctx_tags = LCT_MD_THREAD | \
2732 .cc_pattern = ldlm_cpts,
2735 .so_req_handler = ldlm_cancel_handler,
2736 .so_hpreq_handler = ldlm_hpreq_handler,
2739 ldlm_state->ldlm_cancel_service = \
2740 ptlrpc_register_service(&conf, ldlm_svc_proc_dir);
2741 if (IS_ERR(ldlm_state->ldlm_cancel_service)) {
2742 CERROR("failed to start service\n");
2743 rc = PTR_ERR(ldlm_state->ldlm_cancel_service);
2744 ldlm_state->ldlm_cancel_service = NULL;
2749 OBD_ALLOC(blp, sizeof(*blp));
2751 GOTO(out, rc = -ENOMEM);
2752 ldlm_state->ldlm_bl_pool = blp;
2754 cfs_spin_lock_init(&blp->blp_lock);
2755 CFS_INIT_LIST_HEAD(&blp->blp_list);
2756 CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
2757 cfs_waitq_init(&blp->blp_waitq);
2758 cfs_atomic_set(&blp->blp_num_threads, 0);
2759 cfs_atomic_set(&blp->blp_busy_threads, 0);
2762 if (ldlm_num_threads == 0) {
2763 blp->blp_min_threads = LDLM_NTHRS_INIT;
2764 blp->blp_max_threads = LDLM_NTHRS_MAX;
2766 blp->blp_min_threads = blp->blp_max_threads = \
2767 min_t(int, LDLM_NTHRS_MAX, max_t(int, LDLM_NTHRS_INIT,
2771 for (i = 0; i < blp->blp_min_threads; i++) {
2772 rc = ldlm_bl_thread_start(blp);
2777 # ifdef HAVE_SERVER_SUPPORT
2778 CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
2779 expired_lock_thread.elt_state = ELT_STOPPED;
2780 cfs_waitq_init(&expired_lock_thread.elt_waitq);
2782 CFS_INIT_LIST_HEAD(&waiting_locks_list);
2783 cfs_spin_lock_init(&waiting_locks_spinlock);
2784 cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
2786 rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
2788 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
2792 cfs_wait_event(expired_lock_thread.elt_waitq,
2793 expired_lock_thread.elt_state == ELT_READY);
2794 # endif /* HAVE_SERVER_SUPPORT */
2796 rc = ldlm_pools_init();
2798 CERROR("Failed to initialize LDLM pools: %d\n", rc);
2809 static int ldlm_cleanup(void)
2813 if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
2814 !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
2815 CERROR("ldlm still has namespaces; clean these up first.\n");
2816 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
2817 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
2824 if (ldlm_state->ldlm_bl_pool != NULL) {
2825 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
2827 while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
2828 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
2830 cfs_init_completion(&blp->blp_comp);
2832 cfs_spin_lock(&blp->blp_lock);
2833 cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
2834 cfs_waitq_signal(&blp->blp_waitq);
2835 cfs_spin_unlock(&blp->blp_lock);
2837 cfs_wait_for_completion(&blp->blp_comp);
2840 OBD_FREE(blp, sizeof(*blp));
2842 #endif /* __KERNEL__ */
2844 if (ldlm_state->ldlm_cb_service != NULL)
2845 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
2846 # ifdef HAVE_SERVER_SUPPORT
2847 if (ldlm_state->ldlm_cancel_service != NULL)
2848 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
2852 ldlm_proc_cleanup();
2854 # ifdef HAVE_SERVER_SUPPORT
2855 if (expired_lock_thread.elt_state != ELT_STOPPED) {
2856 expired_lock_thread.elt_state = ELT_TERMINATE;
2857 cfs_waitq_signal(&expired_lock_thread.elt_waitq);
2858 cfs_wait_event(expired_lock_thread.elt_waitq,
2859 expired_lock_thread.elt_state == ELT_STOPPED);
2862 #endif /* __KERNEL__ */
2864 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
2872 cfs_mutex_init(&ldlm_ref_mutex);
2873 cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
2874 cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
2875 ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
2876 sizeof(struct ldlm_resource), 0,
2877 CFS_SLAB_HWCACHE_ALIGN);
2878 if (ldlm_resource_slab == NULL)
2881 ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
2882 sizeof(struct ldlm_lock), 0,
2883 CFS_SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU);
2884 if (ldlm_lock_slab == NULL) {
2885 cfs_mem_cache_destroy(ldlm_resource_slab);
2889 ldlm_interval_slab = cfs_mem_cache_create("interval_node",
2890 sizeof(struct ldlm_interval),
2891 0, CFS_SLAB_HWCACHE_ALIGN);
2892 if (ldlm_interval_slab == NULL) {
2893 cfs_mem_cache_destroy(ldlm_resource_slab);
2894 cfs_mem_cache_destroy(ldlm_lock_slab);
2897 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2898 class_export_dump_hook = ldlm_dump_export_locks;
2903 void ldlm_exit(void)
2907 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
2908 rc = cfs_mem_cache_destroy(ldlm_resource_slab);
2909 LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
2911 /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
2912 * synchronize_rcu() to wait a grace period elapsed, so that
2913 * ldlm_lock_free() get a chance to be called. */
2916 rc = cfs_mem_cache_destroy(ldlm_lock_slab);
2917 LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
2918 rc = cfs_mem_cache_destroy(ldlm_interval_slab);
2919 LASSERTF(rc == 0, "couldn't free interval node slab\n");
2923 EXPORT_SYMBOL(ldlm_extent_shift_kms);
2926 #ifdef HAVE_SERVER_SUPPORT
2927 EXPORT_SYMBOL(ldlm_get_processing_policy);
2929 EXPORT_SYMBOL(ldlm_lock2desc);
2930 EXPORT_SYMBOL(ldlm_register_intent);
2931 EXPORT_SYMBOL(ldlm_lockname);
2932 EXPORT_SYMBOL(ldlm_typename);
2933 EXPORT_SYMBOL(ldlm_lock2handle);
2934 EXPORT_SYMBOL(__ldlm_handle2lock);
2935 EXPORT_SYMBOL(ldlm_lock_get);
2936 EXPORT_SYMBOL(ldlm_lock_put);
2937 EXPORT_SYMBOL(ldlm_lock_match);
2938 EXPORT_SYMBOL(ldlm_lock_cancel);
2939 EXPORT_SYMBOL(ldlm_lock_addref);
2940 EXPORT_SYMBOL(ldlm_lock_addref_try);
2941 EXPORT_SYMBOL(ldlm_lock_decref);
2942 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
2943 EXPORT_SYMBOL(ldlm_lock_change_resource);
2944 EXPORT_SYMBOL(ldlm_it2str);
2945 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2946 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
2947 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
2948 EXPORT_SYMBOL(ldlm_lock_allow_match);
2949 EXPORT_SYMBOL(ldlm_lock_downgrade);
2950 EXPORT_SYMBOL(ldlm_lock_convert);
2952 /* ldlm_request.c */
2953 EXPORT_SYMBOL(ldlm_completion_ast_async);
2954 EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
2955 EXPORT_SYMBOL(ldlm_completion_ast);
2956 EXPORT_SYMBOL(ldlm_blocking_ast);
2957 EXPORT_SYMBOL(ldlm_glimpse_ast);
2958 EXPORT_SYMBOL(ldlm_expired_completion_wait);
2959 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
2960 EXPORT_SYMBOL(ldlm_prep_elc_req);
2961 EXPORT_SYMBOL(ldlm_cli_convert);
2962 EXPORT_SYMBOL(ldlm_cli_enqueue);
2963 EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
2964 EXPORT_SYMBOL(ldlm_cli_enqueue_local);
2965 EXPORT_SYMBOL(ldlm_cli_cancel);
2966 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
2967 EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
2968 EXPORT_SYMBOL(ldlm_cli_cancel_req);
2969 EXPORT_SYMBOL(ldlm_replay_locks);
2970 EXPORT_SYMBOL(ldlm_resource_foreach);
2971 EXPORT_SYMBOL(ldlm_namespace_foreach);
2972 EXPORT_SYMBOL(ldlm_resource_iterate);
2973 EXPORT_SYMBOL(ldlm_cancel_resource_local);
2974 EXPORT_SYMBOL(ldlm_cli_cancel_list_local);
2975 EXPORT_SYMBOL(ldlm_cli_cancel_list);
2978 #ifdef HAVE_SERVER_SUPPORT
2979 EXPORT_SYMBOL(ldlm_server_blocking_ast);
2980 EXPORT_SYMBOL(ldlm_server_completion_ast);
2981 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
2982 EXPORT_SYMBOL(ldlm_glimpse_locks);
2983 EXPORT_SYMBOL(ldlm_handle_enqueue);
2984 EXPORT_SYMBOL(ldlm_handle_enqueue0);
2985 EXPORT_SYMBOL(ldlm_handle_cancel);
2986 EXPORT_SYMBOL(ldlm_request_cancel);
2987 EXPORT_SYMBOL(ldlm_handle_convert);
2988 EXPORT_SYMBOL(ldlm_handle_convert0);
2989 EXPORT_SYMBOL(ldlm_revoke_export_locks);
2991 EXPORT_SYMBOL(ldlm_del_waiting_lock);
2992 EXPORT_SYMBOL(ldlm_get_ref);
2993 EXPORT_SYMBOL(ldlm_put_ref);
2994 EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
2996 /* ldlm_resource.c */
2997 EXPORT_SYMBOL(ldlm_namespace_new);
2998 EXPORT_SYMBOL(ldlm_namespace_cleanup);
2999 EXPORT_SYMBOL(ldlm_namespace_free);
3000 EXPORT_SYMBOL(ldlm_namespace_dump);
3001 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
3002 EXPORT_SYMBOL(ldlm_resource_get);
3003 EXPORT_SYMBOL(ldlm_resource_putref);
3004 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
3007 EXPORT_SYMBOL(client_import_add_conn);
3008 EXPORT_SYMBOL(client_import_del_conn);
3009 EXPORT_SYMBOL(client_obd_setup);
3010 EXPORT_SYMBOL(client_obd_cleanup);
3011 EXPORT_SYMBOL(client_connect_import);
3012 EXPORT_SYMBOL(client_disconnect_export);
3013 EXPORT_SYMBOL(target_send_reply);
3014 EXPORT_SYMBOL(target_pack_pool_reply);
3016 #ifdef HAVE_SERVER_SUPPORT
3017 EXPORT_SYMBOL(server_disconnect_export);
3018 EXPORT_SYMBOL(target_stop_recovery_thread);
3019 EXPORT_SYMBOL(target_handle_connect);
3020 EXPORT_SYMBOL(target_cleanup_recovery);
3021 EXPORT_SYMBOL(target_destroy_export);
3022 EXPORT_SYMBOL(target_cancel_recovery_timer);
3023 EXPORT_SYMBOL(target_queue_recovery_request);
3024 EXPORT_SYMBOL(target_handle_ping);
3025 EXPORT_SYMBOL(target_handle_disconnect);
3029 EXPORT_SYMBOL(lock_res_and_lock);
3030 EXPORT_SYMBOL(unlock_res_and_lock);