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) 2010, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ldlm/ldlm_lock.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Phil Schwan <phil@clusterfs.com>
42 #define DEBUG_SUBSYSTEM S_LDLM
44 #include "../../include/linux/libcfs/libcfs.h"
45 #include "../include/lustre_intent.h"
46 #include "../include/obd_class.h"
47 #include "ldlm_internal.h"
50 char *ldlm_lockname[] = {
58 [LCK_GROUP] = "GROUP",
61 EXPORT_SYMBOL(ldlm_lockname);
63 char *ldlm_typename[] = {
65 [LDLM_EXTENT] = "EXT",
69 EXPORT_SYMBOL(ldlm_typename);
71 static ldlm_policy_wire_to_local_t ldlm_policy_wire18_to_local[] = {
72 [LDLM_PLAIN - LDLM_MIN_TYPE] = ldlm_plain_policy_wire_to_local,
73 [LDLM_EXTENT - LDLM_MIN_TYPE] = ldlm_extent_policy_wire_to_local,
74 [LDLM_FLOCK - LDLM_MIN_TYPE] = ldlm_flock_policy_wire18_to_local,
75 [LDLM_IBITS - LDLM_MIN_TYPE] = ldlm_ibits_policy_wire_to_local,
78 static ldlm_policy_wire_to_local_t ldlm_policy_wire21_to_local[] = {
79 [LDLM_PLAIN - LDLM_MIN_TYPE] = ldlm_plain_policy_wire_to_local,
80 [LDLM_EXTENT - LDLM_MIN_TYPE] = ldlm_extent_policy_wire_to_local,
81 [LDLM_FLOCK - LDLM_MIN_TYPE] = ldlm_flock_policy_wire21_to_local,
82 [LDLM_IBITS - LDLM_MIN_TYPE] = ldlm_ibits_policy_wire_to_local,
85 static ldlm_policy_local_to_wire_t ldlm_policy_local_to_wire[] = {
86 [LDLM_PLAIN - LDLM_MIN_TYPE] = ldlm_plain_policy_local_to_wire,
87 [LDLM_EXTENT - LDLM_MIN_TYPE] = ldlm_extent_policy_local_to_wire,
88 [LDLM_FLOCK - LDLM_MIN_TYPE] = ldlm_flock_policy_local_to_wire,
89 [LDLM_IBITS - LDLM_MIN_TYPE] = ldlm_ibits_policy_local_to_wire,
93 * Converts lock policy from local format to on the wire lock_desc format
95 void ldlm_convert_policy_to_wire(ldlm_type_t type,
96 const ldlm_policy_data_t *lpolicy,
97 ldlm_wire_policy_data_t *wpolicy)
99 ldlm_policy_local_to_wire_t convert;
101 convert = ldlm_policy_local_to_wire[type - LDLM_MIN_TYPE];
103 convert(lpolicy, wpolicy);
107 * Converts lock policy from on the wire lock_desc format to local format
109 void ldlm_convert_policy_to_local(struct obd_export *exp, ldlm_type_t type,
110 const ldlm_wire_policy_data_t *wpolicy,
111 ldlm_policy_data_t *lpolicy)
113 ldlm_policy_wire_to_local_t convert;
116 /** some badness for 2.0.0 clients, but 2.0.0 isn't supported */
117 new_client = (exp_connect_flags(exp) & OBD_CONNECT_FULL20) != 0;
119 convert = ldlm_policy_wire21_to_local[type - LDLM_MIN_TYPE];
121 convert = ldlm_policy_wire18_to_local[type - LDLM_MIN_TYPE];
123 convert(wpolicy, lpolicy);
126 char *ldlm_it2str(int it)
133 case (IT_OPEN | IT_CREAT):
148 CERROR("Unknown intent %d\n", it);
152 EXPORT_SYMBOL(ldlm_it2str);
155 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg)
159 EXPORT_SYMBOL(ldlm_register_intent);
162 * REFCOUNTED LOCK OBJECTS
167 * Get a reference on a lock.
169 * Lock refcounts, during creation:
170 * - one special one for allocation, dec'd only once in destroy
171 * - one for being a lock that's in-use
172 * - one for the addref associated with a new lock
174 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock)
176 atomic_inc(&lock->l_refc);
179 EXPORT_SYMBOL(ldlm_lock_get);
182 * Release lock reference.
184 * Also frees the lock if it was last reference.
186 void ldlm_lock_put(struct ldlm_lock *lock)
188 LASSERT(lock->l_resource != LP_POISON);
189 LASSERT(atomic_read(&lock->l_refc) > 0);
190 if (atomic_dec_and_test(&lock->l_refc)) {
191 struct ldlm_resource *res;
194 "final lock_put on destroyed lock, freeing it.");
196 res = lock->l_resource;
197 LASSERT(lock->l_flags & LDLM_FL_DESTROYED);
198 LASSERT(list_empty(&lock->l_res_link));
199 LASSERT(list_empty(&lock->l_pending_chain));
201 lprocfs_counter_decr(ldlm_res_to_ns(res)->ns_stats,
203 lu_ref_del(&res->lr_reference, "lock", lock);
204 ldlm_resource_putref(res);
205 lock->l_resource = NULL;
206 if (lock->l_export) {
207 class_export_lock_put(lock->l_export, lock);
208 lock->l_export = NULL;
211 kfree(lock->l_lvb_data);
213 ldlm_interval_free(ldlm_interval_detach(lock));
214 lu_ref_fini(&lock->l_reference);
215 OBD_FREE_RCU(lock, sizeof(*lock), &lock->l_handle);
218 EXPORT_SYMBOL(ldlm_lock_put);
221 * Removes LDLM lock \a lock from LRU. Assumes LRU is already locked.
223 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock)
227 if (!list_empty(&lock->l_lru)) {
228 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
230 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
231 list_del_init(&lock->l_lru);
232 LASSERT(ns->ns_nr_unused > 0);
240 * Removes LDLM lock \a lock from LRU. Obtains the LRU lock first.
242 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock)
244 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
247 if (lock->l_flags & LDLM_FL_NS_SRV) {
248 LASSERT(list_empty(&lock->l_lru));
252 spin_lock(&ns->ns_lock);
253 rc = ldlm_lock_remove_from_lru_nolock(lock);
254 spin_unlock(&ns->ns_lock);
259 * Adds LDLM lock \a lock to namespace LRU. Assumes LRU is already locked.
261 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock)
263 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
265 lock->l_last_used = cfs_time_current();
266 LASSERT(list_empty(&lock->l_lru));
267 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
268 list_add_tail(&lock->l_lru, &ns->ns_unused_list);
269 if (lock->l_flags & LDLM_FL_SKIPPED)
270 lock->l_flags &= ~LDLM_FL_SKIPPED;
271 LASSERT(ns->ns_nr_unused >= 0);
276 * Adds LDLM lock \a lock to namespace LRU. Obtains necessary LRU locks
279 void ldlm_lock_add_to_lru(struct ldlm_lock *lock)
281 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
283 spin_lock(&ns->ns_lock);
284 ldlm_lock_add_to_lru_nolock(lock);
285 spin_unlock(&ns->ns_lock);
289 * Moves LDLM lock \a lock that is already in namespace LRU to the tail of
290 * the LRU. Performs necessary LRU locking
292 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock)
294 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
296 if (lock->l_flags & LDLM_FL_NS_SRV) {
297 LASSERT(list_empty(&lock->l_lru));
301 spin_lock(&ns->ns_lock);
302 if (!list_empty(&lock->l_lru)) {
303 ldlm_lock_remove_from_lru_nolock(lock);
304 ldlm_lock_add_to_lru_nolock(lock);
306 spin_unlock(&ns->ns_lock);
310 * Helper to destroy a locked lock.
312 * Used by ldlm_lock_destroy and ldlm_lock_destroy_nolock
313 * Must be called with l_lock and lr_lock held.
315 * Does not actually free the lock data, but rather marks the lock as
316 * destroyed by setting l_destroyed field in the lock to 1. Destroys a
317 * handle->lock association too, so that the lock can no longer be found
318 * and removes the lock from LRU list. Actual lock freeing occurs when
319 * last lock reference goes away.
321 * Original comment (of some historical value):
322 * This used to have a 'strict' flag, which recovery would use to mark an
323 * in-use lock as needing-to-die. Lest I am ever tempted to put it back, I
324 * shall explain why it's gone: with the new hash table scheme, once you call
325 * ldlm_lock_destroy, you can never drop your final references on this lock.
326 * Because it's not in the hash table anymore. -phil
328 int ldlm_lock_destroy_internal(struct ldlm_lock *lock)
330 if (lock->l_readers || lock->l_writers) {
331 LDLM_ERROR(lock, "lock still has references");
335 if (!list_empty(&lock->l_res_link)) {
336 LDLM_ERROR(lock, "lock still on resource");
340 if (lock->l_flags & LDLM_FL_DESTROYED) {
341 LASSERT(list_empty(&lock->l_lru));
344 lock->l_flags |= LDLM_FL_DESTROYED;
346 if (lock->l_export && lock->l_export->exp_lock_hash) {
347 /* NB: it's safe to call cfs_hash_del() even lock isn't
348 * in exp_lock_hash. */
349 /* In the function below, .hs_keycmp resolves to
350 * ldlm_export_lock_keycmp() */
351 /* coverity[overrun-buffer-val] */
352 cfs_hash_del(lock->l_export->exp_lock_hash,
353 &lock->l_remote_handle, &lock->l_exp_hash);
356 ldlm_lock_remove_from_lru(lock);
357 class_handle_unhash(&lock->l_handle);
360 /* Wake anyone waiting for this lock */
361 /* FIXME: I should probably add yet another flag, instead of using
362 * l_export to only call this on clients */
364 class_export_put(lock->l_export);
365 lock->l_export = NULL;
366 if (lock->l_export && lock->l_completion_ast)
367 lock->l_completion_ast(lock, 0);
373 * Destroys a LDLM lock \a lock. Performs necessary locking first.
375 void ldlm_lock_destroy(struct ldlm_lock *lock)
379 lock_res_and_lock(lock);
380 first = ldlm_lock_destroy_internal(lock);
381 unlock_res_and_lock(lock);
383 /* drop reference from hashtable only for first destroy */
385 lu_ref_del(&lock->l_reference, "hash", lock);
386 LDLM_LOCK_RELEASE(lock);
391 * Destroys a LDLM lock \a lock that is already locked.
393 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock)
397 first = ldlm_lock_destroy_internal(lock);
398 /* drop reference from hashtable only for first destroy */
400 lu_ref_del(&lock->l_reference, "hash", lock);
401 LDLM_LOCK_RELEASE(lock);
405 /* this is called by portals_handle2object with the handle lock taken */
406 static void lock_handle_addref(void *lock)
408 LDLM_LOCK_GET((struct ldlm_lock *)lock);
411 static void lock_handle_free(void *lock, int size)
413 LASSERT(size == sizeof(struct ldlm_lock));
414 OBD_SLAB_FREE(lock, ldlm_lock_slab, size);
417 struct portals_handle_ops lock_handle_ops = {
418 .hop_addref = lock_handle_addref,
419 .hop_free = lock_handle_free,
424 * Allocate and initialize new lock structure.
426 * usage: pass in a resource on which you have done ldlm_resource_get
427 * new lock will take over the refcount.
428 * returns: lock with refcount 2 - one for current caller and one for remote
430 static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
432 struct ldlm_lock *lock;
434 if (resource == NULL)
437 OBD_SLAB_ALLOC_PTR_GFP(lock, ldlm_lock_slab, GFP_NOFS);
441 spin_lock_init(&lock->l_lock);
442 lock->l_resource = resource;
443 lu_ref_add(&resource->lr_reference, "lock", lock);
445 atomic_set(&lock->l_refc, 2);
446 INIT_LIST_HEAD(&lock->l_res_link);
447 INIT_LIST_HEAD(&lock->l_lru);
448 INIT_LIST_HEAD(&lock->l_pending_chain);
449 INIT_LIST_HEAD(&lock->l_bl_ast);
450 INIT_LIST_HEAD(&lock->l_cp_ast);
451 INIT_LIST_HEAD(&lock->l_rk_ast);
452 init_waitqueue_head(&lock->l_waitq);
453 lock->l_blocking_lock = NULL;
454 INIT_LIST_HEAD(&lock->l_sl_mode);
455 INIT_LIST_HEAD(&lock->l_sl_policy);
456 INIT_HLIST_NODE(&lock->l_exp_hash);
457 INIT_HLIST_NODE(&lock->l_exp_flock_hash);
459 lprocfs_counter_incr(ldlm_res_to_ns(resource)->ns_stats,
461 INIT_LIST_HEAD(&lock->l_handle.h_link);
462 class_handle_hash(&lock->l_handle, &lock_handle_ops);
464 lu_ref_init(&lock->l_reference);
465 lu_ref_add(&lock->l_reference, "hash", lock);
466 lock->l_callback_timeout = 0;
468 #if LUSTRE_TRACKS_LOCK_EXP_REFS
469 INIT_LIST_HEAD(&lock->l_exp_refs_link);
470 lock->l_exp_refs_nr = 0;
471 lock->l_exp_refs_target = NULL;
473 INIT_LIST_HEAD(&lock->l_exp_list);
479 * Moves LDLM lock \a lock to another resource.
480 * This is used on client when server returns some other lock than requested
481 * (typically as a result of intent operation)
483 int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
484 const struct ldlm_res_id *new_resid)
486 struct ldlm_resource *oldres = lock->l_resource;
487 struct ldlm_resource *newres;
490 LASSERT(ns_is_client(ns));
492 lock_res_and_lock(lock);
493 if (memcmp(new_resid, &lock->l_resource->lr_name,
494 sizeof(lock->l_resource->lr_name)) == 0) {
496 unlock_res_and_lock(lock);
500 LASSERT(new_resid->name[0] != 0);
502 /* This function assumes that the lock isn't on any lists */
503 LASSERT(list_empty(&lock->l_res_link));
505 type = oldres->lr_type;
506 unlock_res_and_lock(lock);
508 newres = ldlm_resource_get(ns, NULL, new_resid, type, 1);
512 lu_ref_add(&newres->lr_reference, "lock", lock);
514 * To flip the lock from the old to the new resource, lock, oldres and
515 * newres have to be locked. Resource spin-locks are nested within
516 * lock->l_lock, and are taken in the memory address order to avoid
519 spin_lock(&lock->l_lock);
520 oldres = lock->l_resource;
521 if (oldres < newres) {
523 lock_res_nested(newres, LRT_NEW);
526 lock_res_nested(oldres, LRT_NEW);
528 LASSERT(memcmp(new_resid, &oldres->lr_name,
529 sizeof(oldres->lr_name)) != 0);
530 lock->l_resource = newres;
532 unlock_res_and_lock(lock);
534 /* ...and the flowers are still standing! */
535 lu_ref_del(&oldres->lr_reference, "lock", lock);
536 ldlm_resource_putref(oldres);
540 EXPORT_SYMBOL(ldlm_lock_change_resource);
542 /** \defgroup ldlm_handles LDLM HANDLES
543 * Ways to get hold of locks without any addresses.
548 * Fills in handle for LDLM lock \a lock into supplied \a lockh
549 * Does not take any references.
551 void ldlm_lock2handle(const struct ldlm_lock *lock, struct lustre_handle *lockh)
553 lockh->cookie = lock->l_handle.h_cookie;
555 EXPORT_SYMBOL(ldlm_lock2handle);
558 * Obtain a lock reference by handle.
560 * if \a flags: atomically get the lock and set the flags.
561 * Return NULL if flag already set
563 struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
566 struct ldlm_lock *lock;
570 lock = class_handle2object(handle->cookie);
574 /* It's unlikely but possible that someone marked the lock as
575 * destroyed after we did handle2object on it */
576 if (flags == 0 && ((lock->l_flags & LDLM_FL_DESTROYED) == 0)) {
577 lu_ref_add(&lock->l_reference, "handle", current);
581 lock_res_and_lock(lock);
583 LASSERT(lock->l_resource != NULL);
585 lu_ref_add_atomic(&lock->l_reference, "handle", current);
586 if (unlikely(lock->l_flags & LDLM_FL_DESTROYED)) {
587 unlock_res_and_lock(lock);
588 CDEBUG(D_INFO, "lock already destroyed: lock %p\n", lock);
593 if (flags && (lock->l_flags & flags)) {
594 unlock_res_and_lock(lock);
600 lock->l_flags |= flags;
602 unlock_res_and_lock(lock);
605 EXPORT_SYMBOL(__ldlm_handle2lock);
606 /** @} ldlm_handles */
609 * Fill in "on the wire" representation for given LDLM lock into supplied
610 * lock descriptor \a desc structure.
612 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc)
614 ldlm_res2desc(lock->l_resource, &desc->l_resource);
615 desc->l_req_mode = lock->l_req_mode;
616 desc->l_granted_mode = lock->l_granted_mode;
617 ldlm_convert_policy_to_wire(lock->l_resource->lr_type,
618 &lock->l_policy_data,
619 &desc->l_policy_data);
621 EXPORT_SYMBOL(ldlm_lock2desc);
624 * Add a lock to list of conflicting locks to send AST to.
626 * Only add if we have not sent a blocking AST to the lock yet.
628 void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
629 struct list_head *work_list)
631 if ((lock->l_flags & LDLM_FL_AST_SENT) == 0) {
632 LDLM_DEBUG(lock, "lock incompatible; sending blocking AST.");
633 lock->l_flags |= LDLM_FL_AST_SENT;
634 /* If the enqueuing client said so, tell the AST recipient to
635 * discard dirty data, rather than writing back. */
636 if (new->l_flags & LDLM_FL_AST_DISCARD_DATA)
637 lock->l_flags |= LDLM_FL_DISCARD_DATA;
638 LASSERT(list_empty(&lock->l_bl_ast));
639 list_add(&lock->l_bl_ast, work_list);
641 LASSERT(lock->l_blocking_lock == NULL);
642 lock->l_blocking_lock = LDLM_LOCK_GET(new);
647 * Add a lock to list of just granted locks to send completion AST to.
649 void ldlm_add_cp_work_item(struct ldlm_lock *lock, struct list_head *work_list)
651 if ((lock->l_flags & LDLM_FL_CP_REQD) == 0) {
652 lock->l_flags |= LDLM_FL_CP_REQD;
653 LDLM_DEBUG(lock, "lock granted; sending completion AST.");
654 LASSERT(list_empty(&lock->l_cp_ast));
655 list_add(&lock->l_cp_ast, work_list);
661 * Aggregator function to add AST work items into a list. Determines
662 * what sort of an AST work needs to be done and calls the proper
664 * Must be called with lr_lock held.
666 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
667 struct list_head *work_list)
669 check_res_locked(lock->l_resource);
671 ldlm_add_bl_work_item(lock, new, work_list);
673 ldlm_add_cp_work_item(lock, work_list);
677 * Add specified reader/writer reference to LDLM lock with handle \a lockh.
678 * r/w reference type is determined by \a mode
679 * Calls ldlm_lock_addref_internal.
681 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
683 struct ldlm_lock *lock;
685 lock = ldlm_handle2lock(lockh);
686 LASSERT(lock != NULL);
687 ldlm_lock_addref_internal(lock, mode);
690 EXPORT_SYMBOL(ldlm_lock_addref);
694 * Add specified reader/writer reference to LDLM lock \a lock.
695 * r/w reference type is determined by \a mode
696 * Removes lock from LRU if it is there.
697 * Assumes the LDLM lock is already locked.
699 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
701 ldlm_lock_remove_from_lru(lock);
702 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
704 lu_ref_add_atomic(&lock->l_reference, "reader", lock);
706 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
708 lu_ref_add_atomic(&lock->l_reference, "writer", lock);
711 lu_ref_add_atomic(&lock->l_reference, "user", lock);
712 LDLM_DEBUG(lock, "ldlm_lock_addref(%s)", ldlm_lockname[mode]);
716 * Attempts to add reader/writer reference to a lock with handle \a lockh, and
717 * fails if lock is already LDLM_FL_CBPENDING or destroyed.
719 * \retval 0 success, lock was addref-ed
721 * \retval -EAGAIN lock is being canceled.
723 int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
725 struct ldlm_lock *lock;
729 lock = ldlm_handle2lock(lockh);
731 lock_res_and_lock(lock);
732 if (lock->l_readers != 0 || lock->l_writers != 0 ||
733 !(lock->l_flags & LDLM_FL_CBPENDING)) {
734 ldlm_lock_addref_internal_nolock(lock, mode);
737 unlock_res_and_lock(lock);
742 EXPORT_SYMBOL(ldlm_lock_addref_try);
745 * Add specified reader/writer reference to LDLM lock \a lock.
746 * Locks LDLM lock and calls ldlm_lock_addref_internal_nolock to do the work.
747 * Only called for local locks.
749 void ldlm_lock_addref_internal(struct ldlm_lock *lock, __u32 mode)
751 lock_res_and_lock(lock);
752 ldlm_lock_addref_internal_nolock(lock, mode);
753 unlock_res_and_lock(lock);
757 * Removes reader/writer reference for LDLM lock \a lock.
758 * Assumes LDLM lock is already locked.
759 * only called in ldlm_flock_destroy and for local locks.
760 * Does NOT add lock to LRU if no r/w references left to accommodate flock locks
761 * that cannot be placed in LRU.
763 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
765 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
766 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
767 LASSERT(lock->l_readers > 0);
768 lu_ref_del(&lock->l_reference, "reader", lock);
771 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
772 LASSERT(lock->l_writers > 0);
773 lu_ref_del(&lock->l_reference, "writer", lock);
777 lu_ref_del(&lock->l_reference, "user", lock);
778 LDLM_LOCK_RELEASE(lock); /* matches the LDLM_LOCK_GET() in addref */
782 * Removes reader/writer reference for LDLM lock \a lock.
783 * Locks LDLM lock first.
784 * If the lock is determined to be client lock on a client and r/w refcount
785 * drops to zero and the lock is not blocked, the lock is added to LRU lock
787 * For blocked LDLM locks if r/w count drops to zero, blocking_ast is called.
789 void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
791 struct ldlm_namespace *ns;
793 lock_res_and_lock(lock);
795 ns = ldlm_lock_to_ns(lock);
797 ldlm_lock_decref_internal_nolock(lock, mode);
799 if (lock->l_flags & LDLM_FL_LOCAL &&
800 !lock->l_readers && !lock->l_writers) {
801 /* If this is a local lock on a server namespace and this was
802 * the last reference, cancel the lock. */
803 CDEBUG(D_INFO, "forcing cancel of local lock\n");
804 lock->l_flags |= LDLM_FL_CBPENDING;
807 if (!lock->l_readers && !lock->l_writers &&
808 (lock->l_flags & LDLM_FL_CBPENDING)) {
809 /* If we received a blocked AST and this was the last reference,
810 * run the callback. */
811 if ((lock->l_flags & LDLM_FL_NS_SRV) && lock->l_export)
812 CERROR("FL_CBPENDING set on non-local lock--just a warning\n");
814 LDLM_DEBUG(lock, "final decref done on cbpending lock");
816 LDLM_LOCK_GET(lock); /* dropped by bl thread */
817 ldlm_lock_remove_from_lru(lock);
818 unlock_res_and_lock(lock);
820 if (lock->l_flags & LDLM_FL_FAIL_LOC)
821 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
823 if ((lock->l_flags & LDLM_FL_ATOMIC_CB) ||
824 ldlm_bl_to_thread_lock(ns, NULL, lock) != 0)
825 ldlm_handle_bl_callback(ns, NULL, lock);
826 } else if (ns_is_client(ns) &&
827 !lock->l_readers && !lock->l_writers &&
828 !(lock->l_flags & LDLM_FL_NO_LRU) &&
829 !(lock->l_flags & LDLM_FL_BL_AST)) {
831 LDLM_DEBUG(lock, "add lock into lru list");
833 /* If this is a client-side namespace and this was the last
834 * reference, put it on the LRU. */
835 ldlm_lock_add_to_lru(lock);
836 unlock_res_and_lock(lock);
838 if (lock->l_flags & LDLM_FL_FAIL_LOC)
839 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
841 /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
842 * are not supported by the server, otherwise, it is done on
844 if (!exp_connect_cancelset(lock->l_conn_export) &&
845 !ns_connect_lru_resize(ns))
846 ldlm_cancel_lru(ns, 0, LCF_ASYNC, 0);
848 LDLM_DEBUG(lock, "do not add lock into lru list");
849 unlock_res_and_lock(lock);
854 * Decrease reader/writer refcount for LDLM lock with handle \a lockh
856 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
858 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
860 LASSERTF(lock != NULL, "Non-existing lock: %#llx\n", lockh->cookie);
861 ldlm_lock_decref_internal(lock, mode);
864 EXPORT_SYMBOL(ldlm_lock_decref);
867 * Decrease reader/writer refcount for LDLM lock with handle
868 * \a lockh and mark it for subsequent cancellation once r/w refcount
869 * drops to zero instead of putting into LRU.
871 * Typical usage is for GROUP locks which we cannot allow to be cached.
873 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
875 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
877 LASSERT(lock != NULL);
879 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
880 lock_res_and_lock(lock);
881 lock->l_flags |= LDLM_FL_CBPENDING;
882 unlock_res_and_lock(lock);
883 ldlm_lock_decref_internal(lock, mode);
886 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
888 struct sl_insert_point {
889 struct list_head *res_link;
890 struct list_head *mode_link;
891 struct list_head *policy_link;
895 * Finds a position to insert the new lock into granted lock list.
897 * Used for locks eligible for skiplist optimization.
900 * queue [input]: the granted list where search acts on;
901 * req [input]: the lock whose position to be located;
902 * prev [output]: positions within 3 lists to insert @req to
906 * - ldlm_grant_lock_with_skiplist
908 static void search_granted_lock(struct list_head *queue,
909 struct ldlm_lock *req,
910 struct sl_insert_point *prev)
912 struct list_head *tmp;
913 struct ldlm_lock *lock, *mode_end, *policy_end;
915 list_for_each(tmp, queue) {
916 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
918 mode_end = list_entry(lock->l_sl_mode.prev,
919 struct ldlm_lock, l_sl_mode);
921 if (lock->l_req_mode != req->l_req_mode) {
922 /* jump to last lock of mode group */
923 tmp = &mode_end->l_res_link;
927 /* suitable mode group is found */
928 if (lock->l_resource->lr_type == LDLM_PLAIN) {
929 /* insert point is last lock of the mode group */
930 prev->res_link = &mode_end->l_res_link;
931 prev->mode_link = &mode_end->l_sl_mode;
932 prev->policy_link = &req->l_sl_policy;
936 if (lock->l_resource->lr_type == LDLM_IBITS) {
939 list_entry(lock->l_sl_policy.prev,
943 if (lock->l_policy_data.l_inodebits.bits ==
944 req->l_policy_data.l_inodebits.bits) {
945 /* insert point is last lock of
946 * the policy group */
948 &policy_end->l_res_link;
950 &policy_end->l_sl_mode;
952 &policy_end->l_sl_policy;
956 if (policy_end == mode_end)
957 /* done with mode group */
960 /* go to next policy group within mode group */
961 tmp = policy_end->l_res_link.next;
962 lock = list_entry(tmp, struct ldlm_lock,
964 } /* loop over policy groups within the mode group */
966 /* insert point is last lock of the mode group,
967 * new policy group is started */
968 prev->res_link = &mode_end->l_res_link;
969 prev->mode_link = &mode_end->l_sl_mode;
970 prev->policy_link = &req->l_sl_policy;
974 LDLM_ERROR(lock, "is not LDLM_PLAIN or LDLM_IBITS lock");
978 /* insert point is last lock on the queue,
979 * new mode group and new policy group are started */
980 prev->res_link = queue->prev;
981 prev->mode_link = &req->l_sl_mode;
982 prev->policy_link = &req->l_sl_policy;
986 * Add a lock into resource granted list after a position described by
989 static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
990 struct sl_insert_point *prev)
992 struct ldlm_resource *res = lock->l_resource;
994 check_res_locked(res);
996 ldlm_resource_dump(D_INFO, res);
997 LDLM_DEBUG(lock, "About to add lock:");
999 if (lock->l_flags & LDLM_FL_DESTROYED) {
1000 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1004 LASSERT(list_empty(&lock->l_res_link));
1005 LASSERT(list_empty(&lock->l_sl_mode));
1006 LASSERT(list_empty(&lock->l_sl_policy));
1009 * lock->link == prev->link means lock is first starting the group.
1010 * Don't re-add to itself to suppress kernel warnings.
1012 if (&lock->l_res_link != prev->res_link)
1013 list_add(&lock->l_res_link, prev->res_link);
1014 if (&lock->l_sl_mode != prev->mode_link)
1015 list_add(&lock->l_sl_mode, prev->mode_link);
1016 if (&lock->l_sl_policy != prev->policy_link)
1017 list_add(&lock->l_sl_policy, prev->policy_link);
1021 * Add a lock to granted list on a resource maintaining skiplist
1024 static void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
1026 struct sl_insert_point prev;
1028 LASSERT(lock->l_req_mode == lock->l_granted_mode);
1030 search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
1031 ldlm_granted_list_add_lock(lock, &prev);
1035 * Perform lock granting bookkeeping.
1037 * Includes putting the lock into granted list and updating lock mode.
1039 * - ldlm_lock_enqueue
1040 * - ldlm_reprocess_queue
1041 * - ldlm_lock_convert
1043 * must be called with lr_lock held
1045 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
1047 struct ldlm_resource *res = lock->l_resource;
1049 check_res_locked(res);
1051 lock->l_granted_mode = lock->l_req_mode;
1052 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS)
1053 ldlm_grant_lock_with_skiplist(lock);
1054 else if (res->lr_type == LDLM_EXTENT)
1055 ldlm_extent_add_lock(res, lock);
1057 ldlm_resource_add_lock(res, &res->lr_granted, lock);
1059 if (lock->l_granted_mode < res->lr_most_restr)
1060 res->lr_most_restr = lock->l_granted_mode;
1062 if (work_list && lock->l_completion_ast != NULL)
1063 ldlm_add_ast_work_item(lock, NULL, work_list);
1065 ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
1069 * Search for a lock with given properties in a queue.
1071 * \retval a referenced lock or NULL. See the flag descriptions below, in the
1072 * comment above ldlm_lock_match
1074 static struct ldlm_lock *search_queue(struct list_head *queue,
1076 ldlm_policy_data_t *policy,
1077 struct ldlm_lock *old_lock,
1078 __u64 flags, int unref)
1080 struct ldlm_lock *lock;
1081 struct list_head *tmp;
1083 list_for_each(tmp, queue) {
1086 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
1088 if (lock == old_lock)
1091 /* Check if this lock can be matched.
1092 * Used by LU-2919(exclusive open) for open lease lock */
1093 if (ldlm_is_excl(lock))
1096 /* llite sometimes wants to match locks that will be
1097 * canceled when their users drop, but we allow it to match
1098 * if it passes in CBPENDING and the lock still has users.
1099 * this is generally only going to be used by children
1100 * whose parents already hold a lock so forward progress
1101 * can still happen. */
1102 if (lock->l_flags & LDLM_FL_CBPENDING &&
1103 !(flags & LDLM_FL_CBPENDING))
1105 if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
1106 lock->l_readers == 0 && lock->l_writers == 0)
1109 if (!(lock->l_req_mode & *mode))
1111 match = lock->l_req_mode;
1113 if (lock->l_resource->lr_type == LDLM_EXTENT &&
1114 (lock->l_policy_data.l_extent.start >
1115 policy->l_extent.start ||
1116 lock->l_policy_data.l_extent.end < policy->l_extent.end))
1119 if (unlikely(match == LCK_GROUP) &&
1120 lock->l_resource->lr_type == LDLM_EXTENT &&
1121 lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
1124 /* We match if we have existing lock with same or wider set
1126 if (lock->l_resource->lr_type == LDLM_IBITS &&
1127 ((lock->l_policy_data.l_inodebits.bits &
1128 policy->l_inodebits.bits) !=
1129 policy->l_inodebits.bits))
1132 if (!unref && (lock->l_flags & LDLM_FL_GONE_MASK))
1135 if ((flags & LDLM_FL_LOCAL_ONLY) &&
1136 !(lock->l_flags & LDLM_FL_LOCAL))
1139 if (flags & LDLM_FL_TEST_LOCK) {
1140 LDLM_LOCK_GET(lock);
1141 ldlm_lock_touch_in_lru(lock);
1143 ldlm_lock_addref_internal_nolock(lock, match);
1152 void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
1154 if ((lock->l_flags & LDLM_FL_FAIL_NOTIFIED) == 0) {
1155 lock->l_flags |= LDLM_FL_FAIL_NOTIFIED;
1156 wake_up_all(&lock->l_waitq);
1159 EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
1161 void ldlm_lock_fail_match(struct ldlm_lock *lock)
1163 lock_res_and_lock(lock);
1164 ldlm_lock_fail_match_locked(lock);
1165 unlock_res_and_lock(lock);
1167 EXPORT_SYMBOL(ldlm_lock_fail_match);
1170 * Mark lock as "matchable" by OST.
1172 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1174 * Assumes LDLM lock is already locked.
1176 void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
1178 lock->l_flags |= LDLM_FL_LVB_READY;
1179 wake_up_all(&lock->l_waitq);
1181 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
1184 * Mark lock as "matchable" by OST.
1185 * Locks the lock and then \see ldlm_lock_allow_match_locked
1187 void ldlm_lock_allow_match(struct ldlm_lock *lock)
1189 lock_res_and_lock(lock);
1190 ldlm_lock_allow_match_locked(lock);
1191 unlock_res_and_lock(lock);
1193 EXPORT_SYMBOL(ldlm_lock_allow_match);
1196 * Attempt to find a lock with specified properties.
1198 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1201 * Can be called in two ways:
1203 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1204 * for a duplicate of.
1206 * Otherwise, all of the fields must be filled in, to match against.
1208 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1209 * server (ie, connh is NULL)
1210 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1211 * list will be considered
1212 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1213 * to be canceled can still be matched as long as they still have reader
1214 * or writer referneces
1215 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1216 * just tell us if we would have matched.
1218 * \retval 1 if it finds an already-existing lock that is compatible; in this
1219 * case, lockh is filled in with a addref()ed lock
1221 * We also check security context, and if that fails we simply return 0 (to
1222 * keep caller code unchanged), the context failure will be discovered by
1223 * caller sometime later.
1225 ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
1226 const struct ldlm_res_id *res_id, ldlm_type_t type,
1227 ldlm_policy_data_t *policy, ldlm_mode_t mode,
1228 struct lustre_handle *lockh, int unref)
1230 struct ldlm_resource *res;
1231 struct ldlm_lock *lock, *old_lock = NULL;
1235 old_lock = ldlm_handle2lock(lockh);
1238 ns = ldlm_lock_to_ns(old_lock);
1239 res_id = &old_lock->l_resource->lr_name;
1240 type = old_lock->l_resource->lr_type;
1241 mode = old_lock->l_req_mode;
1244 res = ldlm_resource_get(ns, NULL, res_id, type, 0);
1246 LASSERT(old_lock == NULL);
1250 LDLM_RESOURCE_ADDREF(res);
1253 lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
1259 if (flags & LDLM_FL_BLOCK_GRANTED) {
1263 lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
1269 lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
1278 LDLM_RESOURCE_DELREF(res);
1279 ldlm_resource_putref(res);
1282 ldlm_lock2handle(lock, lockh);
1283 if ((flags & LDLM_FL_LVB_READY) &&
1284 (!(lock->l_flags & LDLM_FL_LVB_READY))) {
1285 __u64 wait_flags = LDLM_FL_LVB_READY |
1286 LDLM_FL_DESTROYED | LDLM_FL_FAIL_NOTIFIED;
1287 struct l_wait_info lwi;
1289 if (lock->l_completion_ast) {
1290 int err = lock->l_completion_ast(lock,
1291 LDLM_FL_WAIT_NOREPROC,
1294 if (flags & LDLM_FL_TEST_LOCK)
1295 LDLM_LOCK_RELEASE(lock);
1297 ldlm_lock_decref_internal(lock,
1304 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
1305 NULL, LWI_ON_SIGNAL_NOOP, NULL);
1307 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1308 l_wait_event(lock->l_waitq,
1309 lock->l_flags & wait_flags,
1311 if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
1312 if (flags & LDLM_FL_TEST_LOCK)
1313 LDLM_LOCK_RELEASE(lock);
1315 ldlm_lock_decref_internal(lock, mode);
1322 LDLM_DEBUG(lock, "matched (%llu %llu)",
1323 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1324 res_id->name[2] : policy->l_extent.start,
1325 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1326 res_id->name[3] : policy->l_extent.end);
1328 /* check user's security context */
1329 if (lock->l_conn_export &&
1330 sptlrpc_import_check_ctx(
1331 class_exp2cliimp(lock->l_conn_export))) {
1332 if (!(flags & LDLM_FL_TEST_LOCK))
1333 ldlm_lock_decref_internal(lock, mode);
1337 if (flags & LDLM_FL_TEST_LOCK)
1338 LDLM_LOCK_RELEASE(lock);
1340 } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
1341 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res %llu/%llu (%llu %llu)",
1342 ns, type, mode, res_id->name[0],
1344 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1345 res_id->name[2] : policy->l_extent.start,
1346 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1347 res_id->name[3] : policy->l_extent.end);
1350 LDLM_LOCK_PUT(old_lock);
1352 return rc ? mode : 0;
1354 EXPORT_SYMBOL(ldlm_lock_match);
1356 ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
1359 struct ldlm_lock *lock;
1360 ldlm_mode_t mode = 0;
1362 lock = ldlm_handle2lock(lockh);
1364 lock_res_and_lock(lock);
1365 if (lock->l_flags & LDLM_FL_GONE_MASK)
1368 if (lock->l_flags & LDLM_FL_CBPENDING &&
1369 lock->l_readers == 0 && lock->l_writers == 0)
1373 *bits = lock->l_policy_data.l_inodebits.bits;
1374 mode = lock->l_granted_mode;
1375 ldlm_lock_addref_internal_nolock(lock, mode);
1380 unlock_res_and_lock(lock);
1381 LDLM_LOCK_PUT(lock);
1385 EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
1387 /** The caller must guarantee that the buffer is large enough. */
1388 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
1389 enum req_location loc, void *data, int size)
1393 LASSERT(data != NULL);
1396 switch (lock->l_lvb_type) {
1398 if (size == sizeof(struct ost_lvb)) {
1399 if (loc == RCL_CLIENT)
1400 lvb = req_capsule_client_swab_get(pill,
1402 lustre_swab_ost_lvb);
1404 lvb = req_capsule_server_swab_get(pill,
1406 lustre_swab_ost_lvb);
1407 if (unlikely(lvb == NULL)) {
1408 LDLM_ERROR(lock, "no LVB");
1412 memcpy(data, lvb, size);
1413 } else if (size == sizeof(struct ost_lvb_v1)) {
1414 struct ost_lvb *olvb = data;
1416 if (loc == RCL_CLIENT)
1417 lvb = req_capsule_client_swab_get(pill,
1419 lustre_swab_ost_lvb_v1);
1421 lvb = req_capsule_server_sized_swab_get(pill,
1423 lustre_swab_ost_lvb_v1);
1424 if (unlikely(lvb == NULL)) {
1425 LDLM_ERROR(lock, "no LVB");
1429 memcpy(data, lvb, size);
1430 olvb->lvb_mtime_ns = 0;
1431 olvb->lvb_atime_ns = 0;
1432 olvb->lvb_ctime_ns = 0;
1434 LDLM_ERROR(lock, "Replied unexpected ost LVB size %d",
1440 if (size == sizeof(struct lquota_lvb)) {
1441 if (loc == RCL_CLIENT)
1442 lvb = req_capsule_client_swab_get(pill,
1444 lustre_swab_lquota_lvb);
1446 lvb = req_capsule_server_swab_get(pill,
1448 lustre_swab_lquota_lvb);
1449 if (unlikely(lvb == NULL)) {
1450 LDLM_ERROR(lock, "no LVB");
1454 memcpy(data, lvb, size);
1457 "Replied unexpected lquota LVB size %d",
1466 if (loc == RCL_CLIENT)
1467 lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
1469 lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
1470 if (unlikely(lvb == NULL)) {
1471 LDLM_ERROR(lock, "no LVB");
1475 memcpy(data, lvb, size);
1478 LDLM_ERROR(lock, "Unknown LVB type: %d\n", lock->l_lvb_type);
1487 * Create and fill in new LDLM lock with specified properties.
1488 * Returns a referenced lock
1490 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
1491 const struct ldlm_res_id *res_id,
1494 const struct ldlm_callback_suite *cbs,
1495 void *data, __u32 lvb_len,
1496 enum lvb_type lvb_type)
1498 struct ldlm_lock *lock;
1499 struct ldlm_resource *res;
1501 res = ldlm_resource_get(ns, NULL, res_id, type, 1);
1505 lock = ldlm_lock_new(res);
1510 lock->l_req_mode = mode;
1511 lock->l_ast_data = data;
1512 lock->l_pid = current_pid();
1513 if (ns_is_server(ns))
1514 lock->l_flags |= LDLM_FL_NS_SRV;
1516 lock->l_blocking_ast = cbs->lcs_blocking;
1517 lock->l_completion_ast = cbs->lcs_completion;
1518 lock->l_glimpse_ast = cbs->lcs_glimpse;
1521 lock->l_tree_node = NULL;
1522 /* if this is the extent lock, allocate the interval tree node */
1523 if (type == LDLM_EXTENT) {
1524 if (ldlm_interval_alloc(lock) == NULL)
1529 lock->l_lvb_len = lvb_len;
1530 lock->l_lvb_data = kzalloc(lvb_len, GFP_NOFS);
1531 if (!lock->l_lvb_data)
1535 lock->l_lvb_type = lvb_type;
1536 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
1542 ldlm_lock_destroy(lock);
1543 LDLM_LOCK_RELEASE(lock);
1548 * Enqueue (request) a lock.
1550 * Does not block. As a result of enqueue the lock would be put
1551 * into granted or waiting list.
1553 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1554 * set, skip all the enqueueing and delegate lock processing to intent policy
1557 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
1558 struct ldlm_lock **lockp,
1559 void *cookie, __u64 *flags)
1561 struct ldlm_lock *lock = *lockp;
1562 struct ldlm_resource *res = lock->l_resource;
1563 int local = ns_is_client(ldlm_res_to_ns(res));
1564 ldlm_error_t rc = ELDLM_OK;
1565 struct ldlm_interval *node = NULL;
1567 lock->l_last_activity = get_seconds();
1568 /* policies are not executed on the client or during replay */
1569 if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
1570 && !local && ns->ns_policy) {
1571 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
1573 if (rc == ELDLM_LOCK_REPLACED) {
1574 /* The lock that was returned has already been granted,
1575 * and placed into lockp. If it's not the same as the
1576 * one we passed in, then destroy the old one and our
1577 * work here is done. */
1578 if (lock != *lockp) {
1579 ldlm_lock_destroy(lock);
1580 LDLM_LOCK_RELEASE(lock);
1582 *flags |= LDLM_FL_LOCK_CHANGED;
1584 } else if (rc != ELDLM_OK ||
1585 (rc == ELDLM_OK && (*flags & LDLM_FL_INTENT_ONLY))) {
1586 ldlm_lock_destroy(lock);
1591 /* For a replaying lock, it might be already in granted list. So
1592 * unlinking the lock will cause the interval node to be freed, we
1593 * have to allocate the interval node early otherwise we can't regrant
1594 * this lock in the future. - jay */
1595 if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
1596 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, GFP_NOFS);
1598 lock_res_and_lock(lock);
1599 if (local && lock->l_req_mode == lock->l_granted_mode) {
1600 /* The server returned a blocked lock, but it was granted
1601 * before we got a chance to actually enqueue it. We don't
1602 * need to do anything else. */
1603 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
1604 LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
1608 ldlm_resource_unlink_lock(lock);
1609 if (res->lr_type == LDLM_EXTENT && lock->l_tree_node == NULL) {
1611 ldlm_lock_destroy_nolock(lock);
1616 INIT_LIST_HEAD(&node->li_group);
1617 ldlm_interval_attach(node, lock);
1621 /* Some flags from the enqueue want to make it into the AST, via the
1622 * lock's l_flags. */
1623 lock->l_flags |= *flags & LDLM_FL_AST_DISCARD_DATA;
1625 /* This distinction between local lock trees is very important; a client
1626 * namespace only has information about locks taken by that client, and
1627 * thus doesn't have enough information to decide for itself if it can
1628 * be granted (below). In this case, we do exactly what the server
1629 * tells us to do, as dictated by the 'flags'.
1631 * We do exactly the same thing during recovery, when the server is
1632 * more or less trusting the clients not to lie.
1634 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1635 * granted/converting queues. */
1637 if (*flags & LDLM_FL_BLOCK_CONV)
1638 ldlm_resource_add_lock(res, &res->lr_converting, lock);
1639 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
1640 ldlm_resource_add_lock(res, &res->lr_waiting, lock);
1642 ldlm_grant_lock(lock, NULL);
1645 CERROR("This is client-side-only module, cannot handle LDLM_NAMESPACE_SERVER resource type lock.\n");
1650 unlock_res_and_lock(lock);
1652 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
1658 * Process a call to blocking AST callback for a lock in ast_work list
1661 ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1663 struct ldlm_cb_set_arg *arg = opaq;
1664 struct ldlm_lock_desc d;
1666 struct ldlm_lock *lock;
1668 if (list_empty(arg->list))
1671 lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
1673 /* nobody should touch l_bl_ast */
1674 lock_res_and_lock(lock);
1675 list_del_init(&lock->l_bl_ast);
1677 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1678 LASSERT(lock->l_bl_ast_run == 0);
1679 LASSERT(lock->l_blocking_lock);
1680 lock->l_bl_ast_run++;
1681 unlock_res_and_lock(lock);
1683 ldlm_lock2desc(lock->l_blocking_lock, &d);
1685 rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
1686 LDLM_LOCK_RELEASE(lock->l_blocking_lock);
1687 lock->l_blocking_lock = NULL;
1688 LDLM_LOCK_RELEASE(lock);
1694 * Process a call to completion AST callback for a lock in ast_work list
1697 ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1699 struct ldlm_cb_set_arg *arg = opaq;
1701 struct ldlm_lock *lock;
1702 ldlm_completion_callback completion_callback;
1704 if (list_empty(arg->list))
1707 lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
1709 /* It's possible to receive a completion AST before we've set
1710 * the l_completion_ast pointer: either because the AST arrived
1711 * before the reply, or simply because there's a small race
1712 * window between receiving the reply and finishing the local
1713 * enqueue. (bug 842)
1715 * This can't happen with the blocking_ast, however, because we
1716 * will never call the local blocking_ast until we drop our
1717 * reader/writer reference, which we won't do until we get the
1718 * reply and finish enqueueing. */
1720 /* nobody should touch l_cp_ast */
1721 lock_res_and_lock(lock);
1722 list_del_init(&lock->l_cp_ast);
1723 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1724 /* save l_completion_ast since it can be changed by
1725 * mds_intent_policy(), see bug 14225 */
1726 completion_callback = lock->l_completion_ast;
1727 lock->l_flags &= ~LDLM_FL_CP_REQD;
1728 unlock_res_and_lock(lock);
1730 if (completion_callback != NULL)
1731 rc = completion_callback(lock, 0, (void *)arg);
1732 LDLM_LOCK_RELEASE(lock);
1738 * Process a call to revocation AST callback for a lock in ast_work list
1741 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1743 struct ldlm_cb_set_arg *arg = opaq;
1744 struct ldlm_lock_desc desc;
1746 struct ldlm_lock *lock;
1748 if (list_empty(arg->list))
1751 lock = list_entry(arg->list->next, struct ldlm_lock, l_rk_ast);
1752 list_del_init(&lock->l_rk_ast);
1754 /* the desc just pretend to exclusive */
1755 ldlm_lock2desc(lock, &desc);
1756 desc.l_req_mode = LCK_EX;
1757 desc.l_granted_mode = 0;
1759 rc = lock->l_blocking_ast(lock, &desc, (void *)arg, LDLM_CB_BLOCKING);
1760 LDLM_LOCK_RELEASE(lock);
1766 * Process a call to glimpse AST callback for a lock in ast_work list
1768 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1770 struct ldlm_cb_set_arg *arg = opaq;
1771 struct ldlm_glimpse_work *gl_work;
1772 struct ldlm_lock *lock;
1775 if (list_empty(arg->list))
1778 gl_work = list_entry(arg->list->next, struct ldlm_glimpse_work,
1780 list_del_init(&gl_work->gl_list);
1782 lock = gl_work->gl_lock;
1784 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1785 arg->gl_desc = gl_work->gl_desc;
1787 /* invoke the actual glimpse callback */
1788 if (lock->l_glimpse_ast(lock, (void *)arg) == 0)
1791 LDLM_LOCK_RELEASE(lock);
1793 if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
1800 * Process list of locks in need of ASTs being sent.
1802 * Used on server to send multiple ASTs together instead of sending one by
1805 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
1806 enum ldlm_desc_ast_t ast_type)
1808 struct ldlm_cb_set_arg *arg;
1809 set_producer_func work_ast_lock;
1812 if (list_empty(rpc_list))
1815 arg = kzalloc(sizeof(*arg), GFP_NOFS);
1819 atomic_set(&arg->restart, 0);
1820 arg->list = rpc_list;
1823 case LDLM_WORK_BL_AST:
1824 arg->type = LDLM_BL_CALLBACK;
1825 work_ast_lock = ldlm_work_bl_ast_lock;
1827 case LDLM_WORK_CP_AST:
1828 arg->type = LDLM_CP_CALLBACK;
1829 work_ast_lock = ldlm_work_cp_ast_lock;
1831 case LDLM_WORK_REVOKE_AST:
1832 arg->type = LDLM_BL_CALLBACK;
1833 work_ast_lock = ldlm_work_revoke_ast_lock;
1835 case LDLM_WORK_GL_AST:
1836 arg->type = LDLM_GL_CALLBACK;
1837 work_ast_lock = ldlm_work_gl_ast_lock;
1843 /* We create a ptlrpc request set with flow control extension.
1844 * This request set will use the work_ast_lock function to produce new
1845 * requests and will send a new request each time one completes in order
1846 * to keep the number of requests in flight to ns_max_parallel_ast */
1847 arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
1848 work_ast_lock, arg);
1849 if (arg->set == NULL) {
1854 ptlrpc_set_wait(arg->set);
1855 ptlrpc_set_destroy(arg->set);
1857 rc = atomic_read(&arg->restart) ? -ERESTART : 0;
1864 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
1866 ldlm_reprocess_all(res);
1867 return LDLM_ITER_CONTINUE;
1870 static int ldlm_reprocess_res(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1871 struct hlist_node *hnode, void *arg)
1873 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1876 rc = reprocess_one_queue(res, arg);
1878 return rc == LDLM_ITER_STOP;
1882 * Iterate through all resources on a namespace attempting to grant waiting
1885 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
1888 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1889 ldlm_reprocess_res, NULL);
1892 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1895 * Try to grant all waiting locks on a resource.
1897 * Calls ldlm_reprocess_queue on converting and waiting queues.
1899 * Typically called after some resource locks are cancelled to see
1900 * if anything could be granted as a result of the cancellation.
1902 void ldlm_reprocess_all(struct ldlm_resource *res)
1904 LIST_HEAD(rpc_list);
1906 if (!ns_is_client(ldlm_res_to_ns(res))) {
1907 CERROR("This is client-side-only module, cannot handle LDLM_NAMESPACE_SERVER resource type lock.\n");
1913 * Helper function to call blocking AST for LDLM lock \a lock in a
1914 * "cancelling" mode.
1916 void ldlm_cancel_callback(struct ldlm_lock *lock)
1918 check_res_locked(lock->l_resource);
1919 if (!(lock->l_flags & LDLM_FL_CANCEL)) {
1920 lock->l_flags |= LDLM_FL_CANCEL;
1921 if (lock->l_blocking_ast) {
1922 unlock_res_and_lock(lock);
1923 lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
1925 lock_res_and_lock(lock);
1927 LDLM_DEBUG(lock, "no blocking ast");
1930 lock->l_flags |= LDLM_FL_BL_DONE;
1934 * Remove skiplist-enabled LDLM lock \a req from granted list
1936 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req)
1938 if (req->l_resource->lr_type != LDLM_PLAIN &&
1939 req->l_resource->lr_type != LDLM_IBITS)
1942 list_del_init(&req->l_sl_policy);
1943 list_del_init(&req->l_sl_mode);
1947 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
1949 void ldlm_lock_cancel(struct ldlm_lock *lock)
1951 struct ldlm_resource *res;
1952 struct ldlm_namespace *ns;
1954 lock_res_and_lock(lock);
1956 res = lock->l_resource;
1957 ns = ldlm_res_to_ns(res);
1959 /* Please do not, no matter how tempting, remove this LBUG without
1960 * talking to me first. -phik */
1961 if (lock->l_readers || lock->l_writers) {
1962 LDLM_ERROR(lock, "lock still has references");
1966 if (lock->l_flags & LDLM_FL_WAITED)
1967 ldlm_del_waiting_lock(lock);
1969 /* Releases cancel callback. */
1970 ldlm_cancel_callback(lock);
1972 /* Yes, second time, just in case it was added again while we were
1973 * running with no res lock in ldlm_cancel_callback */
1974 if (lock->l_flags & LDLM_FL_WAITED)
1975 ldlm_del_waiting_lock(lock);
1977 ldlm_resource_unlink_lock(lock);
1978 ldlm_lock_destroy_nolock(lock);
1980 if (lock->l_granted_mode == lock->l_req_mode)
1981 ldlm_pool_del(&ns->ns_pool, lock);
1983 /* Make sure we will not be called again for same lock what is possible
1984 * if not to zero out lock->l_granted_mode */
1985 lock->l_granted_mode = LCK_MINMODE;
1986 unlock_res_and_lock(lock);
1988 EXPORT_SYMBOL(ldlm_lock_cancel);
1991 * Set opaque data into the lock that only makes sense to upper layer.
1993 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
1995 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
1999 if (lock->l_ast_data == NULL)
2000 lock->l_ast_data = data;
2001 if (lock->l_ast_data == data)
2003 LDLM_LOCK_PUT(lock);
2007 EXPORT_SYMBOL(ldlm_lock_set_data);
2009 struct export_cl_data {
2010 struct obd_export *ecl_exp;
2015 * Iterator function for ldlm_cancel_locks_for_export.
2016 * Cancels passed locks.
2018 int ldlm_cancel_locks_for_export_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
2019 struct hlist_node *hnode, void *data)
2022 struct export_cl_data *ecl = (struct export_cl_data *)data;
2023 struct obd_export *exp = ecl->ecl_exp;
2024 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2025 struct ldlm_resource *res;
2027 res = ldlm_resource_getref(lock->l_resource);
2028 LDLM_LOCK_GET(lock);
2030 LDLM_DEBUG(lock, "export %p", exp);
2031 ldlm_res_lvbo_update(res, NULL, 1);
2032 ldlm_lock_cancel(lock);
2033 ldlm_reprocess_all(res);
2034 ldlm_resource_putref(res);
2035 LDLM_LOCK_RELEASE(lock);
2038 if ((ecl->ecl_loop & -ecl->ecl_loop) == ecl->ecl_loop) {
2040 "Cancel lock %p for export %p (loop %d), still have %d locks left on hash table.\n",
2041 lock, exp, ecl->ecl_loop,
2042 atomic_read(&hs->hs_count));
2049 * Cancel all locks for given export.
2051 * Typically called on client disconnection/eviction
2053 void ldlm_cancel_locks_for_export(struct obd_export *exp)
2055 struct export_cl_data ecl = {
2060 cfs_hash_for_each_empty(exp->exp_lock_hash,
2061 ldlm_cancel_locks_for_export_cb, &ecl);
2065 * Downgrade an exclusive lock.
2067 * A fast variant of ldlm_lock_convert for conversion of exclusive
2068 * locks. The conversion is always successful.
2069 * Used by Commit on Sharing (COS) code.
2071 * \param lock A lock to convert
2072 * \param new_mode new lock mode
2074 void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
2076 LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
2077 LASSERT(new_mode == LCK_COS);
2079 lock_res_and_lock(lock);
2080 ldlm_resource_unlink_lock(lock);
2082 * Remove the lock from pool as it will be added again in
2083 * ldlm_grant_lock() called below.
2085 ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
2087 lock->l_req_mode = new_mode;
2088 ldlm_grant_lock(lock, NULL);
2089 unlock_res_and_lock(lock);
2090 ldlm_reprocess_all(lock->l_resource);
2092 EXPORT_SYMBOL(ldlm_lock_downgrade);
2095 * Attempt to convert already granted lock to a different mode.
2097 * While lock conversion is not currently used, future client-side
2098 * optimizations could take advantage of it to avoid discarding cached
2101 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
2104 LIST_HEAD(rpc_list);
2105 struct ldlm_resource *res;
2106 struct ldlm_namespace *ns;
2108 struct ldlm_interval *node;
2110 /* Just return if mode is unchanged. */
2111 if (new_mode == lock->l_granted_mode) {
2112 *flags |= LDLM_FL_BLOCK_GRANTED;
2113 return lock->l_resource;
2116 /* I can't check the type of lock here because the bitlock of lock
2117 * is not held here, so do the allocation blindly. -jay */
2118 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, GFP_NOFS);
2120 /* Actually, this causes EDEADLOCK to be returned */
2123 LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
2124 "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
2126 lock_res_and_lock(lock);
2128 res = lock->l_resource;
2129 ns = ldlm_res_to_ns(res);
2131 lock->l_req_mode = new_mode;
2132 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
2133 ldlm_resource_unlink_lock(lock);
2135 ldlm_resource_unlink_lock(lock);
2136 if (res->lr_type == LDLM_EXTENT) {
2137 /* FIXME: ugly code, I have to attach the lock to a
2138 * interval node again since perhaps it will be granted
2140 INIT_LIST_HEAD(&node->li_group);
2141 ldlm_interval_attach(node, lock);
2147 * Remove old lock from the pool before adding the lock with new
2148 * mode below in ->policy()
2150 ldlm_pool_del(&ns->ns_pool, lock);
2152 /* If this is a local resource, put it on the appropriate list. */
2153 if (ns_is_client(ldlm_res_to_ns(res))) {
2154 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
2155 ldlm_resource_add_lock(res, &res->lr_converting, lock);
2157 /* This should never happen, because of the way the
2158 * server handles conversions. */
2159 LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
2163 ldlm_grant_lock(lock, &rpc_list);
2165 /* FIXME: completion handling not with lr_lock held ! */
2166 if (lock->l_completion_ast)
2167 lock->l_completion_ast(lock, 0, NULL);
2170 CERROR("This is client-side-only module, cannot handle LDLM_NAMESPACE_SERVER resource type lock.\n");
2173 unlock_res_and_lock(lock);
2176 ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
2178 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
2181 EXPORT_SYMBOL(ldlm_lock_convert);
2184 * Print lock with lock handle \a lockh description into debug log.
2186 * Used when printing all locks on a resource for debug purposes.
2188 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
2190 struct ldlm_lock *lock;
2192 if (!((libcfs_debug | D_ERROR) & level))
2195 lock = ldlm_handle2lock(lockh);
2199 LDLM_DEBUG_LIMIT(level, lock, "###");
2201 LDLM_LOCK_PUT(lock);
2203 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2206 * Print lock information with custom message into debug log.
2209 void _ldlm_lock_debug(struct ldlm_lock *lock,
2210 struct libcfs_debug_msg_data *msgdata,
2211 const char *fmt, ...)
2214 struct obd_export *exp = lock->l_export;
2215 struct ldlm_resource *resource = lock->l_resource;
2216 char *nid = "local";
2218 va_start(args, fmt);
2220 if (exp && exp->exp_connection) {
2221 nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
2222 } else if (exp && exp->exp_obd != NULL) {
2223 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
2225 nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
2228 if (resource == NULL) {
2229 libcfs_debug_vmsg2(msgdata, fmt, args,
2230 " ns: \?\? lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: \?\? rrc=\?\? type: \?\?\? flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2232 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2233 lock->l_readers, lock->l_writers,
2234 ldlm_lockname[lock->l_granted_mode],
2235 ldlm_lockname[lock->l_req_mode],
2236 lock->l_flags, nid, lock->l_remote_handle.cookie,
2237 exp ? atomic_read(&exp->exp_refcount) : -99,
2238 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2243 switch (resource->lr_type) {
2245 libcfs_debug_vmsg2(msgdata, fmt, args,
2246 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " rrc: %d type: %s [%llu->%llu] (req %llu->%llu) flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2247 ldlm_lock_to_ns_name(lock), lock,
2248 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2249 lock->l_readers, lock->l_writers,
2250 ldlm_lockname[lock->l_granted_mode],
2251 ldlm_lockname[lock->l_req_mode],
2253 atomic_read(&resource->lr_refcount),
2254 ldlm_typename[resource->lr_type],
2255 lock->l_policy_data.l_extent.start,
2256 lock->l_policy_data.l_extent.end,
2257 lock->l_req_extent.start, lock->l_req_extent.end,
2258 lock->l_flags, nid, lock->l_remote_handle.cookie,
2259 exp ? atomic_read(&exp->exp_refcount) : -99,
2260 lock->l_pid, lock->l_callback_timeout,
2265 libcfs_debug_vmsg2(msgdata, fmt, args,
2266 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " rrc: %d type: %s pid: %d [%llu->%llu] flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu\n",
2267 ldlm_lock_to_ns_name(lock), lock,
2268 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2269 lock->l_readers, lock->l_writers,
2270 ldlm_lockname[lock->l_granted_mode],
2271 ldlm_lockname[lock->l_req_mode],
2273 atomic_read(&resource->lr_refcount),
2274 ldlm_typename[resource->lr_type],
2275 lock->l_policy_data.l_flock.pid,
2276 lock->l_policy_data.l_flock.start,
2277 lock->l_policy_data.l_flock.end,
2278 lock->l_flags, nid, lock->l_remote_handle.cookie,
2279 exp ? atomic_read(&exp->exp_refcount) : -99,
2280 lock->l_pid, lock->l_callback_timeout);
2284 libcfs_debug_vmsg2(msgdata, fmt, args,
2285 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " bits %#llx rrc: %d type: %s flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2286 ldlm_lock_to_ns_name(lock),
2287 lock, lock->l_handle.h_cookie,
2288 atomic_read(&lock->l_refc),
2289 lock->l_readers, lock->l_writers,
2290 ldlm_lockname[lock->l_granted_mode],
2291 ldlm_lockname[lock->l_req_mode],
2293 lock->l_policy_data.l_inodebits.bits,
2294 atomic_read(&resource->lr_refcount),
2295 ldlm_typename[resource->lr_type],
2296 lock->l_flags, nid, lock->l_remote_handle.cookie,
2297 exp ? atomic_read(&exp->exp_refcount) : -99,
2298 lock->l_pid, lock->l_callback_timeout,
2303 libcfs_debug_vmsg2(msgdata, fmt, args,
2304 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " rrc: %d type: %s flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2305 ldlm_lock_to_ns_name(lock),
2306 lock, lock->l_handle.h_cookie,
2307 atomic_read(&lock->l_refc),
2308 lock->l_readers, lock->l_writers,
2309 ldlm_lockname[lock->l_granted_mode],
2310 ldlm_lockname[lock->l_req_mode],
2312 atomic_read(&resource->lr_refcount),
2313 ldlm_typename[resource->lr_type],
2314 lock->l_flags, nid, lock->l_remote_handle.cookie,
2315 exp ? atomic_read(&exp->exp_refcount) : -99,
2316 lock->l_pid, lock->l_callback_timeout,
2322 EXPORT_SYMBOL(_ldlm_lock_debug);