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 <linux/libcfs/libcfs.h>
45 # include <linux/lustre_intent.h>
47 #include <obd_class.h>
48 #include "ldlm_internal.h"
51 char *ldlm_lockname[] = {
59 [LCK_GROUP] = "GROUP",
62 EXPORT_SYMBOL(ldlm_lockname);
64 char *ldlm_typename[] = {
66 [LDLM_EXTENT] = "EXT",
70 EXPORT_SYMBOL(ldlm_typename);
72 static ldlm_policy_wire_to_local_t ldlm_policy_wire18_to_local[] = {
73 [LDLM_PLAIN - LDLM_MIN_TYPE] = ldlm_plain_policy_wire_to_local,
74 [LDLM_EXTENT - LDLM_MIN_TYPE] = ldlm_extent_policy_wire_to_local,
75 [LDLM_FLOCK - LDLM_MIN_TYPE] = ldlm_flock_policy_wire18_to_local,
76 [LDLM_IBITS - LDLM_MIN_TYPE] = ldlm_ibits_policy_wire_to_local,
79 static ldlm_policy_wire_to_local_t ldlm_policy_wire21_to_local[] = {
80 [LDLM_PLAIN - LDLM_MIN_TYPE] = ldlm_plain_policy_wire_to_local,
81 [LDLM_EXTENT - LDLM_MIN_TYPE] = ldlm_extent_policy_wire_to_local,
82 [LDLM_FLOCK - LDLM_MIN_TYPE] = ldlm_flock_policy_wire21_to_local,
83 [LDLM_IBITS - LDLM_MIN_TYPE] = ldlm_ibits_policy_wire_to_local,
86 static ldlm_policy_local_to_wire_t ldlm_policy_local_to_wire[] = {
87 [LDLM_PLAIN - LDLM_MIN_TYPE] = ldlm_plain_policy_local_to_wire,
88 [LDLM_EXTENT - LDLM_MIN_TYPE] = ldlm_extent_policy_local_to_wire,
89 [LDLM_FLOCK - LDLM_MIN_TYPE] = ldlm_flock_policy_local_to_wire,
90 [LDLM_IBITS - LDLM_MIN_TYPE] = ldlm_ibits_policy_local_to_wire,
94 * Converts lock policy from local format to on the wire lock_desc format
96 void ldlm_convert_policy_to_wire(ldlm_type_t type,
97 const ldlm_policy_data_t *lpolicy,
98 ldlm_wire_policy_data_t *wpolicy)
100 ldlm_policy_local_to_wire_t convert;
102 convert = ldlm_policy_local_to_wire[type - LDLM_MIN_TYPE];
104 convert(lpolicy, wpolicy);
108 * Converts lock policy from on the wire lock_desc format to local format
110 void ldlm_convert_policy_to_local(struct obd_export *exp, ldlm_type_t type,
111 const ldlm_wire_policy_data_t *wpolicy,
112 ldlm_policy_data_t *lpolicy)
114 ldlm_policy_wire_to_local_t convert;
117 /** some badness for 2.0.0 clients, but 2.0.0 isn't supported */
118 new_client = (exp_connect_flags(exp) & OBD_CONNECT_FULL20) != 0;
120 convert = ldlm_policy_wire21_to_local[type - LDLM_MIN_TYPE];
122 convert = ldlm_policy_wire18_to_local[type - LDLM_MIN_TYPE];
124 convert(wpolicy, lpolicy);
127 char *ldlm_it2str(int it)
134 case (IT_OPEN | IT_CREAT):
149 CERROR("Unknown intent %d\n", it);
153 EXPORT_SYMBOL(ldlm_it2str);
155 extern struct kmem_cache *ldlm_lock_slab;
158 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg)
162 EXPORT_SYMBOL(ldlm_register_intent);
165 * REFCOUNTED LOCK OBJECTS
170 * Get a reference on a lock.
172 * Lock refcounts, during creation:
173 * - one special one for allocation, dec'd only once in destroy
174 * - one for being a lock that's in-use
175 * - one for the addref associated with a new lock
177 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock)
179 atomic_inc(&lock->l_refc);
182 EXPORT_SYMBOL(ldlm_lock_get);
185 * Release lock reference.
187 * Also frees the lock if it was last reference.
189 void ldlm_lock_put(struct ldlm_lock *lock)
191 LASSERT(lock->l_resource != LP_POISON);
192 LASSERT(atomic_read(&lock->l_refc) > 0);
193 if (atomic_dec_and_test(&lock->l_refc)) {
194 struct ldlm_resource *res;
197 "final lock_put on destroyed lock, freeing it.");
199 res = lock->l_resource;
200 LASSERT(lock->l_flags & LDLM_FL_DESTROYED);
201 LASSERT(list_empty(&lock->l_res_link));
202 LASSERT(list_empty(&lock->l_pending_chain));
204 lprocfs_counter_decr(ldlm_res_to_ns(res)->ns_stats,
206 lu_ref_del(&res->lr_reference, "lock", lock);
207 ldlm_resource_putref(res);
208 lock->l_resource = NULL;
209 if (lock->l_export) {
210 class_export_lock_put(lock->l_export, lock);
211 lock->l_export = NULL;
214 if (lock->l_lvb_data != NULL)
215 OBD_FREE(lock->l_lvb_data, lock->l_lvb_len);
217 ldlm_interval_free(ldlm_interval_detach(lock));
218 lu_ref_fini(&lock->l_reference);
219 OBD_FREE_RCU(lock, sizeof(*lock), &lock->l_handle);
222 EXPORT_SYMBOL(ldlm_lock_put);
225 * Removes LDLM lock \a lock from LRU. Assumes LRU is already locked.
227 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock)
230 if (!list_empty(&lock->l_lru)) {
231 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
233 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
234 list_del_init(&lock->l_lru);
235 if (lock->l_flags & LDLM_FL_SKIPPED)
236 lock->l_flags &= ~LDLM_FL_SKIPPED;
237 LASSERT(ns->ns_nr_unused > 0);
245 * Removes LDLM lock \a lock from LRU. Obtains the LRU lock first.
247 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock)
249 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
252 if (lock->l_flags & LDLM_FL_NS_SRV) {
253 LASSERT(list_empty(&lock->l_lru));
257 spin_lock(&ns->ns_lock);
258 rc = ldlm_lock_remove_from_lru_nolock(lock);
259 spin_unlock(&ns->ns_lock);
264 * Adds LDLM lock \a lock to namespace LRU. Assumes LRU is already locked.
266 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock)
268 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
270 lock->l_last_used = cfs_time_current();
271 LASSERT(list_empty(&lock->l_lru));
272 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
273 list_add_tail(&lock->l_lru, &ns->ns_unused_list);
274 LASSERT(ns->ns_nr_unused >= 0);
279 * Adds LDLM lock \a lock to namespace LRU. Obtains necessary LRU locks
282 void ldlm_lock_add_to_lru(struct ldlm_lock *lock)
284 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
286 spin_lock(&ns->ns_lock);
287 ldlm_lock_add_to_lru_nolock(lock);
288 spin_unlock(&ns->ns_lock);
292 * Moves LDLM lock \a lock that is already in namespace LRU to the tail of
293 * the LRU. Performs necessary LRU locking
295 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock)
297 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
299 if (lock->l_flags & LDLM_FL_NS_SRV) {
300 LASSERT(list_empty(&lock->l_lru));
304 spin_lock(&ns->ns_lock);
305 if (!list_empty(&lock->l_lru)) {
306 ldlm_lock_remove_from_lru_nolock(lock);
307 ldlm_lock_add_to_lru_nolock(lock);
309 spin_unlock(&ns->ns_lock);
313 * Helper to destroy a locked lock.
315 * Used by ldlm_lock_destroy and ldlm_lock_destroy_nolock
316 * Must be called with l_lock and lr_lock held.
318 * Does not actually free the lock data, but rather marks the lock as
319 * destroyed by setting l_destroyed field in the lock to 1. Destroys a
320 * handle->lock association too, so that the lock can no longer be found
321 * and removes the lock from LRU list. Actual lock freeing occurs when
322 * last lock reference goes away.
324 * Original comment (of some historical value):
325 * This used to have a 'strict' flag, which recovery would use to mark an
326 * in-use lock as needing-to-die. Lest I am ever tempted to put it back, I
327 * shall explain why it's gone: with the new hash table scheme, once you call
328 * ldlm_lock_destroy, you can never drop your final references on this lock.
329 * Because it's not in the hash table anymore. -phil
331 int ldlm_lock_destroy_internal(struct ldlm_lock *lock)
333 if (lock->l_readers || lock->l_writers) {
334 LDLM_ERROR(lock, "lock still has references");
338 if (!list_empty(&lock->l_res_link)) {
339 LDLM_ERROR(lock, "lock still on resource");
343 if (lock->l_flags & LDLM_FL_DESTROYED) {
344 LASSERT(list_empty(&lock->l_lru));
347 lock->l_flags |= LDLM_FL_DESTROYED;
349 if (lock->l_export && lock->l_export->exp_lock_hash) {
350 /* NB: it's safe to call cfs_hash_del() even lock isn't
351 * in exp_lock_hash. */
352 /* In the function below, .hs_keycmp resolves to
353 * ldlm_export_lock_keycmp() */
354 /* coverity[overrun-buffer-val] */
355 cfs_hash_del(lock->l_export->exp_lock_hash,
356 &lock->l_remote_handle, &lock->l_exp_hash);
359 ldlm_lock_remove_from_lru(lock);
360 class_handle_unhash(&lock->l_handle);
363 /* Wake anyone waiting for this lock */
364 /* FIXME: I should probably add yet another flag, instead of using
365 * l_export to only call this on clients */
367 class_export_put(lock->l_export);
368 lock->l_export = NULL;
369 if (lock->l_export && lock->l_completion_ast)
370 lock->l_completion_ast(lock, 0);
376 * Destroys a LDLM lock \a lock. Performs necessary locking first.
378 void ldlm_lock_destroy(struct ldlm_lock *lock)
382 lock_res_and_lock(lock);
383 first = ldlm_lock_destroy_internal(lock);
384 unlock_res_and_lock(lock);
386 /* drop reference from hashtable only for first destroy */
388 lu_ref_del(&lock->l_reference, "hash", lock);
389 LDLM_LOCK_RELEASE(lock);
394 * Destroys a LDLM lock \a lock that is already locked.
396 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock)
400 first = ldlm_lock_destroy_internal(lock);
401 /* drop reference from hashtable only for first destroy */
403 lu_ref_del(&lock->l_reference, "hash", lock);
404 LDLM_LOCK_RELEASE(lock);
408 /* this is called by portals_handle2object with the handle lock taken */
409 static void lock_handle_addref(void *lock)
411 LDLM_LOCK_GET((struct ldlm_lock *)lock);
414 static void lock_handle_free(void *lock, int size)
416 LASSERT(size == sizeof(struct ldlm_lock));
417 OBD_SLAB_FREE(lock, ldlm_lock_slab, size);
420 struct portals_handle_ops lock_handle_ops = {
421 .hop_addref = lock_handle_addref,
422 .hop_free = lock_handle_free,
427 * Allocate and initialize new lock structure.
429 * usage: pass in a resource on which you have done ldlm_resource_get
430 * new lock will take over the refcount.
431 * returns: lock with refcount 2 - one for current caller and one for remote
433 static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
435 struct ldlm_lock *lock;
437 if (resource == NULL)
440 OBD_SLAB_ALLOC_PTR_GFP(lock, ldlm_lock_slab, __GFP_IO);
444 spin_lock_init(&lock->l_lock);
445 lock->l_resource = resource;
446 lu_ref_add(&resource->lr_reference, "lock", lock);
448 atomic_set(&lock->l_refc, 2);
449 INIT_LIST_HEAD(&lock->l_res_link);
450 INIT_LIST_HEAD(&lock->l_lru);
451 INIT_LIST_HEAD(&lock->l_pending_chain);
452 INIT_LIST_HEAD(&lock->l_bl_ast);
453 INIT_LIST_HEAD(&lock->l_cp_ast);
454 INIT_LIST_HEAD(&lock->l_rk_ast);
455 init_waitqueue_head(&lock->l_waitq);
456 lock->l_blocking_lock = NULL;
457 INIT_LIST_HEAD(&lock->l_sl_mode);
458 INIT_LIST_HEAD(&lock->l_sl_policy);
459 INIT_HLIST_NODE(&lock->l_exp_hash);
460 INIT_HLIST_NODE(&lock->l_exp_flock_hash);
462 lprocfs_counter_incr(ldlm_res_to_ns(resource)->ns_stats,
464 INIT_LIST_HEAD(&lock->l_handle.h_link);
465 class_handle_hash(&lock->l_handle, &lock_handle_ops);
467 lu_ref_init(&lock->l_reference);
468 lu_ref_add(&lock->l_reference, "hash", lock);
469 lock->l_callback_timeout = 0;
471 #if LUSTRE_TRACKS_LOCK_EXP_REFS
472 INIT_LIST_HEAD(&lock->l_exp_refs_link);
473 lock->l_exp_refs_nr = 0;
474 lock->l_exp_refs_target = NULL;
476 INIT_LIST_HEAD(&lock->l_exp_list);
482 * Moves LDLM lock \a lock to another resource.
483 * This is used on client when server returns some other lock than requested
484 * (typically as a result of intent operation)
486 int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
487 const struct ldlm_res_id *new_resid)
489 struct ldlm_resource *oldres = lock->l_resource;
490 struct ldlm_resource *newres;
493 LASSERT(ns_is_client(ns));
495 lock_res_and_lock(lock);
496 if (memcmp(new_resid, &lock->l_resource->lr_name,
497 sizeof(lock->l_resource->lr_name)) == 0) {
499 unlock_res_and_lock(lock);
503 LASSERT(new_resid->name[0] != 0);
505 /* This function assumes that the lock isn't on any lists */
506 LASSERT(list_empty(&lock->l_res_link));
508 type = oldres->lr_type;
509 unlock_res_and_lock(lock);
511 newres = ldlm_resource_get(ns, NULL, new_resid, type, 1);
515 lu_ref_add(&newres->lr_reference, "lock", lock);
517 * To flip the lock from the old to the new resource, lock, oldres and
518 * newres have to be locked. Resource spin-locks are nested within
519 * lock->l_lock, and are taken in the memory address order to avoid
522 spin_lock(&lock->l_lock);
523 oldres = lock->l_resource;
524 if (oldres < newres) {
526 lock_res_nested(newres, LRT_NEW);
529 lock_res_nested(oldres, LRT_NEW);
531 LASSERT(memcmp(new_resid, &oldres->lr_name,
532 sizeof oldres->lr_name) != 0);
533 lock->l_resource = newres;
535 unlock_res_and_lock(lock);
537 /* ...and the flowers are still standing! */
538 lu_ref_del(&oldres->lr_reference, "lock", lock);
539 ldlm_resource_putref(oldres);
543 EXPORT_SYMBOL(ldlm_lock_change_resource);
545 /** \defgroup ldlm_handles LDLM HANDLES
546 * Ways to get hold of locks without any addresses.
551 * Fills in handle for LDLM lock \a lock into supplied \a lockh
552 * Does not take any references.
554 void ldlm_lock2handle(const struct ldlm_lock *lock, struct lustre_handle *lockh)
556 lockh->cookie = lock->l_handle.h_cookie;
558 EXPORT_SYMBOL(ldlm_lock2handle);
561 * Obtain a lock reference by handle.
563 * if \a flags: atomically get the lock and set the flags.
564 * Return NULL if flag already set
566 struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
569 struct ldlm_lock *lock;
573 lock = class_handle2object(handle->cookie);
577 /* It's unlikely but possible that someone marked the lock as
578 * destroyed after we did handle2object on it */
579 if (flags == 0 && ((lock->l_flags & LDLM_FL_DESTROYED)== 0)) {
580 lu_ref_add(&lock->l_reference, "handle", current);
584 lock_res_and_lock(lock);
586 LASSERT(lock->l_resource != NULL);
588 lu_ref_add_atomic(&lock->l_reference, "handle", current);
589 if (unlikely(lock->l_flags & LDLM_FL_DESTROYED)) {
590 unlock_res_and_lock(lock);
591 CDEBUG(D_INFO, "lock already destroyed: lock %p\n", lock);
596 if (flags && (lock->l_flags & flags)) {
597 unlock_res_and_lock(lock);
603 lock->l_flags |= flags;
605 unlock_res_and_lock(lock);
608 EXPORT_SYMBOL(__ldlm_handle2lock);
609 /** @} ldlm_handles */
612 * Fill in "on the wire" representation for given LDLM lock into supplied
613 * lock descriptor \a desc structure.
615 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc)
617 struct obd_export *exp = lock->l_export ?: lock->l_conn_export;
619 /* INODEBITS_INTEROP: If the other side does not support
620 * inodebits, reply with a plain lock descriptor. */
621 if ((lock->l_resource->lr_type == LDLM_IBITS) &&
622 (exp && !(exp_connect_flags(exp) & OBD_CONNECT_IBITS))) {
623 /* Make sure all the right bits are set in this lock we
624 are going to pass to client */
625 LASSERTF(lock->l_policy_data.l_inodebits.bits ==
626 (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
627 MDS_INODELOCK_LAYOUT),
628 "Inappropriate inode lock bits during "
629 "conversion " LPU64 "\n",
630 lock->l_policy_data.l_inodebits.bits);
632 ldlm_res2desc(lock->l_resource, &desc->l_resource);
633 desc->l_resource.lr_type = LDLM_PLAIN;
635 /* Convert "new" lock mode to something old client can
637 if ((lock->l_req_mode == LCK_CR) ||
638 (lock->l_req_mode == LCK_CW))
639 desc->l_req_mode = LCK_PR;
641 desc->l_req_mode = lock->l_req_mode;
642 if ((lock->l_granted_mode == LCK_CR) ||
643 (lock->l_granted_mode == LCK_CW)) {
644 desc->l_granted_mode = LCK_PR;
646 /* We never grant PW/EX locks to clients */
647 LASSERT((lock->l_granted_mode != LCK_PW) &&
648 (lock->l_granted_mode != LCK_EX));
649 desc->l_granted_mode = lock->l_granted_mode;
652 /* We do not copy policy here, because there is no
653 policy for plain locks */
655 ldlm_res2desc(lock->l_resource, &desc->l_resource);
656 desc->l_req_mode = lock->l_req_mode;
657 desc->l_granted_mode = lock->l_granted_mode;
658 ldlm_convert_policy_to_wire(lock->l_resource->lr_type,
659 &lock->l_policy_data,
660 &desc->l_policy_data);
663 EXPORT_SYMBOL(ldlm_lock2desc);
666 * Add a lock to list of conflicting locks to send AST to.
668 * Only add if we have not sent a blocking AST to the lock yet.
670 void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
671 struct list_head *work_list)
673 if ((lock->l_flags & LDLM_FL_AST_SENT) == 0) {
674 LDLM_DEBUG(lock, "lock incompatible; sending blocking AST.");
675 lock->l_flags |= LDLM_FL_AST_SENT;
676 /* If the enqueuing client said so, tell the AST recipient to
677 * discard dirty data, rather than writing back. */
678 if (new->l_flags & LDLM_FL_AST_DISCARD_DATA)
679 lock->l_flags |= LDLM_FL_DISCARD_DATA;
680 LASSERT(list_empty(&lock->l_bl_ast));
681 list_add(&lock->l_bl_ast, work_list);
683 LASSERT(lock->l_blocking_lock == NULL);
684 lock->l_blocking_lock = LDLM_LOCK_GET(new);
689 * Add a lock to list of just granted locks to send completion AST to.
691 void ldlm_add_cp_work_item(struct ldlm_lock *lock, struct list_head *work_list)
693 if ((lock->l_flags & LDLM_FL_CP_REQD) == 0) {
694 lock->l_flags |= LDLM_FL_CP_REQD;
695 LDLM_DEBUG(lock, "lock granted; sending completion AST.");
696 LASSERT(list_empty(&lock->l_cp_ast));
697 list_add(&lock->l_cp_ast, work_list);
703 * Aggregator function to add AST work items into a list. Determines
704 * what sort of an AST work needs to be done and calls the proper
706 * Must be called with lr_lock held.
708 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
709 struct list_head *work_list)
711 check_res_locked(lock->l_resource);
713 ldlm_add_bl_work_item(lock, new, work_list);
715 ldlm_add_cp_work_item(lock, work_list);
719 * Add specified reader/writer reference to LDLM lock with handle \a lockh.
720 * r/w reference type is determined by \a mode
721 * Calls ldlm_lock_addref_internal.
723 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
725 struct ldlm_lock *lock;
727 lock = ldlm_handle2lock(lockh);
728 LASSERT(lock != NULL);
729 ldlm_lock_addref_internal(lock, mode);
732 EXPORT_SYMBOL(ldlm_lock_addref);
736 * Add specified reader/writer reference to LDLM lock \a lock.
737 * r/w reference type is determined by \a mode
738 * Removes lock from LRU if it is there.
739 * Assumes the LDLM lock is already locked.
741 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
743 ldlm_lock_remove_from_lru(lock);
744 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
746 lu_ref_add_atomic(&lock->l_reference, "reader", lock);
748 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
750 lu_ref_add_atomic(&lock->l_reference, "writer", lock);
753 lu_ref_add_atomic(&lock->l_reference, "user", lock);
754 LDLM_DEBUG(lock, "ldlm_lock_addref(%s)", ldlm_lockname[mode]);
758 * Attempts to add reader/writer reference to a lock with handle \a lockh, and
759 * fails if lock is already LDLM_FL_CBPENDING or destroyed.
761 * \retval 0 success, lock was addref-ed
763 * \retval -EAGAIN lock is being canceled.
765 int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
767 struct ldlm_lock *lock;
771 lock = ldlm_handle2lock(lockh);
773 lock_res_and_lock(lock);
774 if (lock->l_readers != 0 || lock->l_writers != 0 ||
775 !(lock->l_flags & LDLM_FL_CBPENDING)) {
776 ldlm_lock_addref_internal_nolock(lock, mode);
779 unlock_res_and_lock(lock);
784 EXPORT_SYMBOL(ldlm_lock_addref_try);
787 * Add specified reader/writer reference to LDLM lock \a lock.
788 * Locks LDLM lock and calls ldlm_lock_addref_internal_nolock to do the work.
789 * Only called for local locks.
791 void ldlm_lock_addref_internal(struct ldlm_lock *lock, __u32 mode)
793 lock_res_and_lock(lock);
794 ldlm_lock_addref_internal_nolock(lock, mode);
795 unlock_res_and_lock(lock);
799 * Removes reader/writer reference for LDLM lock \a lock.
800 * Assumes LDLM lock is already locked.
801 * only called in ldlm_flock_destroy and for local locks.
802 * Does NOT add lock to LRU if no r/w references left to accomodate flock locks
803 * that cannot be placed in LRU.
805 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
807 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
808 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
809 LASSERT(lock->l_readers > 0);
810 lu_ref_del(&lock->l_reference, "reader", lock);
813 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
814 LASSERT(lock->l_writers > 0);
815 lu_ref_del(&lock->l_reference, "writer", lock);
819 lu_ref_del(&lock->l_reference, "user", lock);
820 LDLM_LOCK_RELEASE(lock); /* matches the LDLM_LOCK_GET() in addref */
824 * Removes reader/writer reference for LDLM lock \a lock.
825 * Locks LDLM lock first.
826 * If the lock is determined to be client lock on a client and r/w refcount
827 * drops to zero and the lock is not blocked, the lock is added to LRU lock
829 * For blocked LDLM locks if r/w count drops to zero, blocking_ast is called.
831 void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
833 struct ldlm_namespace *ns;
835 lock_res_and_lock(lock);
837 ns = ldlm_lock_to_ns(lock);
839 ldlm_lock_decref_internal_nolock(lock, mode);
841 if (lock->l_flags & LDLM_FL_LOCAL &&
842 !lock->l_readers && !lock->l_writers) {
843 /* If this is a local lock on a server namespace and this was
844 * the last reference, cancel the lock. */
845 CDEBUG(D_INFO, "forcing cancel of local lock\n");
846 lock->l_flags |= LDLM_FL_CBPENDING;
849 if (!lock->l_readers && !lock->l_writers &&
850 (lock->l_flags & LDLM_FL_CBPENDING)) {
851 /* If we received a blocked AST and this was the last reference,
852 * run the callback. */
853 if ((lock->l_flags & LDLM_FL_NS_SRV) && lock->l_export)
854 CERROR("FL_CBPENDING set on non-local lock--just a "
857 LDLM_DEBUG(lock, "final decref done on cbpending lock");
859 LDLM_LOCK_GET(lock); /* dropped by bl thread */
860 ldlm_lock_remove_from_lru(lock);
861 unlock_res_and_lock(lock);
863 if (lock->l_flags & LDLM_FL_FAIL_LOC)
864 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
866 if ((lock->l_flags & LDLM_FL_ATOMIC_CB) ||
867 ldlm_bl_to_thread_lock(ns, NULL, lock) != 0)
868 ldlm_handle_bl_callback(ns, NULL, lock);
869 } else if (ns_is_client(ns) &&
870 !lock->l_readers && !lock->l_writers &&
871 !(lock->l_flags & LDLM_FL_NO_LRU) &&
872 !(lock->l_flags & LDLM_FL_BL_AST)) {
874 LDLM_DEBUG(lock, "add lock into lru list");
876 /* If this is a client-side namespace and this was the last
877 * reference, put it on the LRU. */
878 ldlm_lock_add_to_lru(lock);
879 unlock_res_and_lock(lock);
881 if (lock->l_flags & LDLM_FL_FAIL_LOC)
882 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
884 /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
885 * are not supported by the server, otherwise, it is done on
887 if (!exp_connect_cancelset(lock->l_conn_export) &&
888 !ns_connect_lru_resize(ns))
889 ldlm_cancel_lru(ns, 0, LCF_ASYNC, 0);
891 LDLM_DEBUG(lock, "do not add lock into lru list");
892 unlock_res_and_lock(lock);
897 * Decrease reader/writer refcount for LDLM lock with handle \a lockh
899 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
901 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
902 LASSERTF(lock != NULL, "Non-existing lock: "LPX64"\n", lockh->cookie);
903 ldlm_lock_decref_internal(lock, mode);
906 EXPORT_SYMBOL(ldlm_lock_decref);
909 * Decrease reader/writer refcount for LDLM lock with handle
910 * \a lockh and mark it for subsequent cancellation once r/w refcount
911 * drops to zero instead of putting into LRU.
913 * Typical usage is for GROUP locks which we cannot allow to be cached.
915 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
917 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
919 LASSERT(lock != NULL);
921 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
922 lock_res_and_lock(lock);
923 lock->l_flags |= LDLM_FL_CBPENDING;
924 unlock_res_and_lock(lock);
925 ldlm_lock_decref_internal(lock, mode);
928 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
930 struct sl_insert_point {
931 struct list_head *res_link;
932 struct list_head *mode_link;
933 struct list_head *policy_link;
937 * Finds a position to insert the new lock into granted lock list.
939 * Used for locks eligible for skiplist optimization.
942 * queue [input]: the granted list where search acts on;
943 * req [input]: the lock whose position to be located;
944 * prev [output]: positions within 3 lists to insert @req to
948 * - ldlm_grant_lock_with_skiplist
950 static void search_granted_lock(struct list_head *queue,
951 struct ldlm_lock *req,
952 struct sl_insert_point *prev)
954 struct list_head *tmp;
955 struct ldlm_lock *lock, *mode_end, *policy_end;
957 list_for_each(tmp, queue) {
958 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
960 mode_end = list_entry(lock->l_sl_mode.prev,
961 struct ldlm_lock, l_sl_mode);
963 if (lock->l_req_mode != req->l_req_mode) {
964 /* jump to last lock of mode group */
965 tmp = &mode_end->l_res_link;
969 /* suitable mode group is found */
970 if (lock->l_resource->lr_type == LDLM_PLAIN) {
971 /* insert point is last lock of the mode group */
972 prev->res_link = &mode_end->l_res_link;
973 prev->mode_link = &mode_end->l_sl_mode;
974 prev->policy_link = &req->l_sl_policy;
976 } else if (lock->l_resource->lr_type == LDLM_IBITS) {
979 list_entry(lock->l_sl_policy.prev,
983 if (lock->l_policy_data.l_inodebits.bits ==
984 req->l_policy_data.l_inodebits.bits) {
985 /* insert point is last lock of
986 * the policy group */
988 &policy_end->l_res_link;
990 &policy_end->l_sl_mode;
992 &policy_end->l_sl_policy;
996 if (policy_end == mode_end)
997 /* done with mode group */
1000 /* go to next policy group within mode group */
1001 tmp = policy_end->l_res_link.next;
1002 lock = list_entry(tmp, struct ldlm_lock,
1004 } /* loop over policy groups within the mode group */
1006 /* insert point is last lock of the mode group,
1007 * new policy group is started */
1008 prev->res_link = &mode_end->l_res_link;
1009 prev->mode_link = &mode_end->l_sl_mode;
1010 prev->policy_link = &req->l_sl_policy;
1013 LDLM_ERROR(lock,"is not LDLM_PLAIN or LDLM_IBITS lock");
1018 /* insert point is last lock on the queue,
1019 * new mode group and new policy group are started */
1020 prev->res_link = queue->prev;
1021 prev->mode_link = &req->l_sl_mode;
1022 prev->policy_link = &req->l_sl_policy;
1027 * Add a lock into resource granted list after a position described by
1030 static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
1031 struct sl_insert_point *prev)
1033 struct ldlm_resource *res = lock->l_resource;
1035 check_res_locked(res);
1037 ldlm_resource_dump(D_INFO, res);
1038 LDLM_DEBUG(lock, "About to add lock:");
1040 if (lock->l_flags & LDLM_FL_DESTROYED) {
1041 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1045 LASSERT(list_empty(&lock->l_res_link));
1046 LASSERT(list_empty(&lock->l_sl_mode));
1047 LASSERT(list_empty(&lock->l_sl_policy));
1050 * lock->link == prev->link means lock is first starting the group.
1051 * Don't re-add to itself to suppress kernel warnings.
1053 if (&lock->l_res_link != prev->res_link)
1054 list_add(&lock->l_res_link, prev->res_link);
1055 if (&lock->l_sl_mode != prev->mode_link)
1056 list_add(&lock->l_sl_mode, prev->mode_link);
1057 if (&lock->l_sl_policy != prev->policy_link)
1058 list_add(&lock->l_sl_policy, prev->policy_link);
1062 * Add a lock to granted list on a resource maintaining skiplist
1065 static void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
1067 struct sl_insert_point prev;
1069 LASSERT(lock->l_req_mode == lock->l_granted_mode);
1071 search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
1072 ldlm_granted_list_add_lock(lock, &prev);
1076 * Perform lock granting bookkeeping.
1078 * Includes putting the lock into granted list and updating lock mode.
1080 * - ldlm_lock_enqueue
1081 * - ldlm_reprocess_queue
1082 * - ldlm_lock_convert
1084 * must be called with lr_lock held
1086 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
1088 struct ldlm_resource *res = lock->l_resource;
1090 check_res_locked(res);
1092 lock->l_granted_mode = lock->l_req_mode;
1093 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS)
1094 ldlm_grant_lock_with_skiplist(lock);
1095 else if (res->lr_type == LDLM_EXTENT)
1096 ldlm_extent_add_lock(res, lock);
1098 ldlm_resource_add_lock(res, &res->lr_granted, lock);
1100 if (lock->l_granted_mode < res->lr_most_restr)
1101 res->lr_most_restr = lock->l_granted_mode;
1103 if (work_list && lock->l_completion_ast != NULL)
1104 ldlm_add_ast_work_item(lock, NULL, work_list);
1106 ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
1110 * Search for a lock with given properties in a queue.
1112 * \retval a referenced lock or NULL. See the flag descriptions below, in the
1113 * comment above ldlm_lock_match
1115 static struct ldlm_lock *search_queue(struct list_head *queue,
1117 ldlm_policy_data_t *policy,
1118 struct ldlm_lock *old_lock,
1119 __u64 flags, int unref)
1121 struct ldlm_lock *lock;
1122 struct list_head *tmp;
1124 list_for_each(tmp, queue) {
1127 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
1129 if (lock == old_lock)
1132 /* llite sometimes wants to match locks that will be
1133 * canceled when their users drop, but we allow it to match
1134 * if it passes in CBPENDING and the lock still has users.
1135 * this is generally only going to be used by children
1136 * whose parents already hold a lock so forward progress
1137 * can still happen. */
1138 if (lock->l_flags & LDLM_FL_CBPENDING &&
1139 !(flags & LDLM_FL_CBPENDING))
1141 if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
1142 lock->l_readers == 0 && lock->l_writers == 0)
1145 if (!(lock->l_req_mode & *mode))
1147 match = lock->l_req_mode;
1149 if (lock->l_resource->lr_type == LDLM_EXTENT &&
1150 (lock->l_policy_data.l_extent.start >
1151 policy->l_extent.start ||
1152 lock->l_policy_data.l_extent.end < policy->l_extent.end))
1155 if (unlikely(match == LCK_GROUP) &&
1156 lock->l_resource->lr_type == LDLM_EXTENT &&
1157 lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
1160 /* We match if we have existing lock with same or wider set
1162 if (lock->l_resource->lr_type == LDLM_IBITS &&
1163 ((lock->l_policy_data.l_inodebits.bits &
1164 policy->l_inodebits.bits) !=
1165 policy->l_inodebits.bits))
1168 if (!unref && (lock->l_flags & LDLM_FL_GONE_MASK))
1171 if ((flags & LDLM_FL_LOCAL_ONLY) &&
1172 !(lock->l_flags & LDLM_FL_LOCAL))
1175 if (flags & LDLM_FL_TEST_LOCK) {
1176 LDLM_LOCK_GET(lock);
1177 ldlm_lock_touch_in_lru(lock);
1179 ldlm_lock_addref_internal_nolock(lock, match);
1188 void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
1190 if ((lock->l_flags & LDLM_FL_FAIL_NOTIFIED) == 0) {
1191 lock->l_flags |= LDLM_FL_FAIL_NOTIFIED;
1192 wake_up_all(&lock->l_waitq);
1195 EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
1197 void ldlm_lock_fail_match(struct ldlm_lock *lock)
1199 lock_res_and_lock(lock);
1200 ldlm_lock_fail_match_locked(lock);
1201 unlock_res_and_lock(lock);
1203 EXPORT_SYMBOL(ldlm_lock_fail_match);
1206 * Mark lock as "matchable" by OST.
1208 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1210 * Assumes LDLM lock is already locked.
1212 void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
1214 lock->l_flags |= LDLM_FL_LVB_READY;
1215 wake_up_all(&lock->l_waitq);
1217 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
1220 * Mark lock as "matchable" by OST.
1221 * Locks the lock and then \see ldlm_lock_allow_match_locked
1223 void ldlm_lock_allow_match(struct ldlm_lock *lock)
1225 lock_res_and_lock(lock);
1226 ldlm_lock_allow_match_locked(lock);
1227 unlock_res_and_lock(lock);
1229 EXPORT_SYMBOL(ldlm_lock_allow_match);
1232 * Attempt to find a lock with specified properties.
1234 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1237 * Can be called in two ways:
1239 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1240 * for a duplicate of.
1242 * Otherwise, all of the fields must be filled in, to match against.
1244 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1245 * server (ie, connh is NULL)
1246 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1247 * list will be considered
1248 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1249 * to be canceled can still be matched as long as they still have reader
1250 * or writer refernces
1251 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1252 * just tell us if we would have matched.
1254 * \retval 1 if it finds an already-existing lock that is compatible; in this
1255 * case, lockh is filled in with a addref()ed lock
1257 * We also check security context, and if that fails we simply return 0 (to
1258 * keep caller code unchanged), the context failure will be discovered by
1259 * caller sometime later.
1261 ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
1262 const struct ldlm_res_id *res_id, ldlm_type_t type,
1263 ldlm_policy_data_t *policy, ldlm_mode_t mode,
1264 struct lustre_handle *lockh, int unref)
1266 struct ldlm_resource *res;
1267 struct ldlm_lock *lock, *old_lock = NULL;
1271 old_lock = ldlm_handle2lock(lockh);
1274 ns = ldlm_lock_to_ns(old_lock);
1275 res_id = &old_lock->l_resource->lr_name;
1276 type = old_lock->l_resource->lr_type;
1277 mode = old_lock->l_req_mode;
1280 res = ldlm_resource_get(ns, NULL, res_id, type, 0);
1282 LASSERT(old_lock == NULL);
1286 LDLM_RESOURCE_ADDREF(res);
1289 lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
1293 if (flags & LDLM_FL_BLOCK_GRANTED)
1295 lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
1299 lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
1306 LDLM_RESOURCE_DELREF(res);
1307 ldlm_resource_putref(res);
1310 ldlm_lock2handle(lock, lockh);
1311 if ((flags & LDLM_FL_LVB_READY) &&
1312 (!(lock->l_flags & LDLM_FL_LVB_READY))) {
1313 __u64 wait_flags = LDLM_FL_LVB_READY |
1314 LDLM_FL_DESTROYED | LDLM_FL_FAIL_NOTIFIED;
1315 struct l_wait_info lwi;
1316 if (lock->l_completion_ast) {
1317 int err = lock->l_completion_ast(lock,
1318 LDLM_FL_WAIT_NOREPROC,
1321 if (flags & LDLM_FL_TEST_LOCK)
1322 LDLM_LOCK_RELEASE(lock);
1324 ldlm_lock_decref_internal(lock,
1331 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
1332 NULL, LWI_ON_SIGNAL_NOOP, NULL);
1334 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1335 l_wait_event(lock->l_waitq,
1336 lock->l_flags & wait_flags,
1338 if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
1339 if (flags & LDLM_FL_TEST_LOCK)
1340 LDLM_LOCK_RELEASE(lock);
1342 ldlm_lock_decref_internal(lock, mode);
1349 LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
1350 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1351 res_id->name[2] : policy->l_extent.start,
1352 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1353 res_id->name[3] : policy->l_extent.end);
1355 /* check user's security context */
1356 if (lock->l_conn_export &&
1357 sptlrpc_import_check_ctx(
1358 class_exp2cliimp(lock->l_conn_export))) {
1359 if (!(flags & LDLM_FL_TEST_LOCK))
1360 ldlm_lock_decref_internal(lock, mode);
1364 if (flags & LDLM_FL_TEST_LOCK)
1365 LDLM_LOCK_RELEASE(lock);
1367 } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
1368 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
1369 LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
1370 type, mode, res_id->name[0], res_id->name[1],
1371 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1372 res_id->name[2] :policy->l_extent.start,
1373 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1374 res_id->name[3] : policy->l_extent.end);
1377 LDLM_LOCK_PUT(old_lock);
1379 return rc ? mode : 0;
1381 EXPORT_SYMBOL(ldlm_lock_match);
1383 ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
1386 struct ldlm_lock *lock;
1387 ldlm_mode_t mode = 0;
1389 lock = ldlm_handle2lock(lockh);
1391 lock_res_and_lock(lock);
1392 if (lock->l_flags & LDLM_FL_GONE_MASK)
1395 if (lock->l_flags & LDLM_FL_CBPENDING &&
1396 lock->l_readers == 0 && lock->l_writers == 0)
1400 *bits = lock->l_policy_data.l_inodebits.bits;
1401 mode = lock->l_granted_mode;
1402 ldlm_lock_addref_internal_nolock(lock, mode);
1407 unlock_res_and_lock(lock);
1408 LDLM_LOCK_PUT(lock);
1412 EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
1414 /** The caller must guarantee that the buffer is large enough. */
1415 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
1416 enum req_location loc, void *data, int size)
1420 LASSERT(data != NULL);
1423 switch (lock->l_lvb_type) {
1425 if (size == sizeof(struct ost_lvb)) {
1426 if (loc == RCL_CLIENT)
1427 lvb = req_capsule_client_swab_get(pill,
1429 lustre_swab_ost_lvb);
1431 lvb = req_capsule_server_swab_get(pill,
1433 lustre_swab_ost_lvb);
1434 if (unlikely(lvb == NULL)) {
1435 LDLM_ERROR(lock, "no LVB");
1439 memcpy(data, lvb, size);
1440 } else if (size == sizeof(struct ost_lvb_v1)) {
1441 struct ost_lvb *olvb = data;
1443 if (loc == RCL_CLIENT)
1444 lvb = req_capsule_client_swab_get(pill,
1446 lustre_swab_ost_lvb_v1);
1448 lvb = req_capsule_server_sized_swab_get(pill,
1450 lustre_swab_ost_lvb_v1);
1451 if (unlikely(lvb == NULL)) {
1452 LDLM_ERROR(lock, "no LVB");
1456 memcpy(data, lvb, size);
1457 olvb->lvb_mtime_ns = 0;
1458 olvb->lvb_atime_ns = 0;
1459 olvb->lvb_ctime_ns = 0;
1461 LDLM_ERROR(lock, "Replied unexpected ost LVB size %d",
1467 if (size == sizeof(struct lquota_lvb)) {
1468 if (loc == RCL_CLIENT)
1469 lvb = req_capsule_client_swab_get(pill,
1471 lustre_swab_lquota_lvb);
1473 lvb = req_capsule_server_swab_get(pill,
1475 lustre_swab_lquota_lvb);
1476 if (unlikely(lvb == NULL)) {
1477 LDLM_ERROR(lock, "no LVB");
1481 memcpy(data, lvb, size);
1483 LDLM_ERROR(lock, "Replied unexpected lquota LVB size %d",
1492 if (loc == RCL_CLIENT)
1493 lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
1495 lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
1496 if (unlikely(lvb == NULL)) {
1497 LDLM_ERROR(lock, "no LVB");
1501 memcpy(data, lvb, size);
1504 LDLM_ERROR(lock, "Unknown LVB type: %d\n", lock->l_lvb_type);
1513 * Create and fill in new LDLM lock with specified properties.
1514 * Returns a referenced lock
1516 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
1517 const struct ldlm_res_id *res_id,
1520 const struct ldlm_callback_suite *cbs,
1521 void *data, __u32 lvb_len,
1522 enum lvb_type lvb_type)
1524 struct ldlm_lock *lock;
1525 struct ldlm_resource *res;
1527 res = ldlm_resource_get(ns, NULL, res_id, type, 1);
1531 lock = ldlm_lock_new(res);
1536 lock->l_req_mode = mode;
1537 lock->l_ast_data = data;
1538 lock->l_pid = current_pid();
1539 if (ns_is_server(ns))
1540 lock->l_flags |= LDLM_FL_NS_SRV;
1542 lock->l_blocking_ast = cbs->lcs_blocking;
1543 lock->l_completion_ast = cbs->lcs_completion;
1544 lock->l_glimpse_ast = cbs->lcs_glimpse;
1547 lock->l_tree_node = NULL;
1548 /* if this is the extent lock, allocate the interval tree node */
1549 if (type == LDLM_EXTENT) {
1550 if (ldlm_interval_alloc(lock) == NULL)
1555 lock->l_lvb_len = lvb_len;
1556 OBD_ALLOC(lock->l_lvb_data, lvb_len);
1557 if (lock->l_lvb_data == NULL)
1561 lock->l_lvb_type = lvb_type;
1562 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
1568 ldlm_lock_destroy(lock);
1569 LDLM_LOCK_RELEASE(lock);
1574 * Enqueue (request) a lock.
1576 * Does not block. As a result of enqueue the lock would be put
1577 * into granted or waiting list.
1579 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1580 * set, skip all the enqueueing and delegate lock processing to intent policy
1583 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
1584 struct ldlm_lock **lockp,
1585 void *cookie, __u64 *flags)
1587 struct ldlm_lock *lock = *lockp;
1588 struct ldlm_resource *res = lock->l_resource;
1589 int local = ns_is_client(ldlm_res_to_ns(res));
1590 ldlm_error_t rc = ELDLM_OK;
1591 struct ldlm_interval *node = NULL;
1593 lock->l_last_activity = cfs_time_current_sec();
1594 /* policies are not executed on the client or during replay */
1595 if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
1596 && !local && ns->ns_policy) {
1597 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
1599 if (rc == ELDLM_LOCK_REPLACED) {
1600 /* The lock that was returned has already been granted,
1601 * and placed into lockp. If it's not the same as the
1602 * one we passed in, then destroy the old one and our
1603 * work here is done. */
1604 if (lock != *lockp) {
1605 ldlm_lock_destroy(lock);
1606 LDLM_LOCK_RELEASE(lock);
1608 *flags |= LDLM_FL_LOCK_CHANGED;
1610 } else if (rc != ELDLM_OK ||
1611 (rc == ELDLM_OK && (*flags & LDLM_FL_INTENT_ONLY))) {
1612 ldlm_lock_destroy(lock);
1617 /* For a replaying lock, it might be already in granted list. So
1618 * unlinking the lock will cause the interval node to be freed, we
1619 * have to allocate the interval node early otherwise we can't regrant
1620 * this lock in the future. - jay */
1621 if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
1622 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
1624 lock_res_and_lock(lock);
1625 if (local && lock->l_req_mode == lock->l_granted_mode) {
1626 /* The server returned a blocked lock, but it was granted
1627 * before we got a chance to actually enqueue it. We don't
1628 * need to do anything else. */
1629 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
1630 LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
1631 GOTO(out, ELDLM_OK);
1634 ldlm_resource_unlink_lock(lock);
1635 if (res->lr_type == LDLM_EXTENT && lock->l_tree_node == NULL) {
1637 ldlm_lock_destroy_nolock(lock);
1638 GOTO(out, rc = -ENOMEM);
1641 INIT_LIST_HEAD(&node->li_group);
1642 ldlm_interval_attach(node, lock);
1646 /* Some flags from the enqueue want to make it into the AST, via the
1647 * lock's l_flags. */
1648 lock->l_flags |= *flags & LDLM_FL_AST_DISCARD_DATA;
1650 /* This distinction between local lock trees is very important; a client
1651 * namespace only has information about locks taken by that client, and
1652 * thus doesn't have enough information to decide for itself if it can
1653 * be granted (below). In this case, we do exactly what the server
1654 * tells us to do, as dictated by the 'flags'.
1656 * We do exactly the same thing during recovery, when the server is
1657 * more or less trusting the clients not to lie.
1659 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1660 * granted/converting queues. */
1662 if (*flags & LDLM_FL_BLOCK_CONV)
1663 ldlm_resource_add_lock(res, &res->lr_converting, lock);
1664 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
1665 ldlm_resource_add_lock(res, &res->lr_waiting, lock);
1667 ldlm_grant_lock(lock, NULL);
1668 GOTO(out, ELDLM_OK);
1670 CERROR("This is client-side-only module, cannot handle "
1671 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1676 unlock_res_and_lock(lock);
1678 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
1684 * Process a call to blocking AST callback for a lock in ast_work list
1687 ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1689 struct ldlm_cb_set_arg *arg = opaq;
1690 struct ldlm_lock_desc d;
1692 struct ldlm_lock *lock;
1694 if (list_empty(arg->list))
1697 lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
1699 /* nobody should touch l_bl_ast */
1700 lock_res_and_lock(lock);
1701 list_del_init(&lock->l_bl_ast);
1703 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1704 LASSERT(lock->l_bl_ast_run == 0);
1705 LASSERT(lock->l_blocking_lock);
1706 lock->l_bl_ast_run++;
1707 unlock_res_and_lock(lock);
1709 ldlm_lock2desc(lock->l_blocking_lock, &d);
1711 rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
1712 LDLM_LOCK_RELEASE(lock->l_blocking_lock);
1713 lock->l_blocking_lock = NULL;
1714 LDLM_LOCK_RELEASE(lock);
1720 * Process a call to completion AST callback for a lock in ast_work list
1723 ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1725 struct ldlm_cb_set_arg *arg = opaq;
1727 struct ldlm_lock *lock;
1728 ldlm_completion_callback completion_callback;
1730 if (list_empty(arg->list))
1733 lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
1735 /* It's possible to receive a completion AST before we've set
1736 * the l_completion_ast pointer: either because the AST arrived
1737 * before the reply, or simply because there's a small race
1738 * window between receiving the reply and finishing the local
1739 * enqueue. (bug 842)
1741 * This can't happen with the blocking_ast, however, because we
1742 * will never call the local blocking_ast until we drop our
1743 * reader/writer reference, which we won't do until we get the
1744 * reply and finish enqueueing. */
1746 /* nobody should touch l_cp_ast */
1747 lock_res_and_lock(lock);
1748 list_del_init(&lock->l_cp_ast);
1749 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1750 /* save l_completion_ast since it can be changed by
1751 * mds_intent_policy(), see bug 14225 */
1752 completion_callback = lock->l_completion_ast;
1753 lock->l_flags &= ~LDLM_FL_CP_REQD;
1754 unlock_res_and_lock(lock);
1756 if (completion_callback != NULL)
1757 rc = completion_callback(lock, 0, (void *)arg);
1758 LDLM_LOCK_RELEASE(lock);
1764 * Process a call to revocation AST callback for a lock in ast_work list
1767 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1769 struct ldlm_cb_set_arg *arg = opaq;
1770 struct ldlm_lock_desc desc;
1772 struct ldlm_lock *lock;
1774 if (list_empty(arg->list))
1777 lock = list_entry(arg->list->next, struct ldlm_lock, l_rk_ast);
1778 list_del_init(&lock->l_rk_ast);
1780 /* the desc just pretend to exclusive */
1781 ldlm_lock2desc(lock, &desc);
1782 desc.l_req_mode = LCK_EX;
1783 desc.l_granted_mode = 0;
1785 rc = lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
1786 LDLM_LOCK_RELEASE(lock);
1792 * Process a call to glimpse AST callback for a lock in ast_work list
1794 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1796 struct ldlm_cb_set_arg *arg = opaq;
1797 struct ldlm_glimpse_work *gl_work;
1798 struct ldlm_lock *lock;
1801 if (list_empty(arg->list))
1804 gl_work = list_entry(arg->list->next, struct ldlm_glimpse_work,
1806 list_del_init(&gl_work->gl_list);
1808 lock = gl_work->gl_lock;
1810 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1811 arg->gl_desc = gl_work->gl_desc;
1813 /* invoke the actual glimpse callback */
1814 if (lock->l_glimpse_ast(lock, (void*)arg) == 0)
1817 LDLM_LOCK_RELEASE(lock);
1819 if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
1820 OBD_FREE_PTR(gl_work);
1826 * Process list of locks in need of ASTs being sent.
1828 * Used on server to send multiple ASTs together instead of sending one by
1831 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
1832 ldlm_desc_ast_t ast_type)
1834 struct ldlm_cb_set_arg *arg;
1835 set_producer_func work_ast_lock;
1838 if (list_empty(rpc_list))
1845 atomic_set(&arg->restart, 0);
1846 arg->list = rpc_list;
1849 case LDLM_WORK_BL_AST:
1850 arg->type = LDLM_BL_CALLBACK;
1851 work_ast_lock = ldlm_work_bl_ast_lock;
1853 case LDLM_WORK_CP_AST:
1854 arg->type = LDLM_CP_CALLBACK;
1855 work_ast_lock = ldlm_work_cp_ast_lock;
1857 case LDLM_WORK_REVOKE_AST:
1858 arg->type = LDLM_BL_CALLBACK;
1859 work_ast_lock = ldlm_work_revoke_ast_lock;
1861 case LDLM_WORK_GL_AST:
1862 arg->type = LDLM_GL_CALLBACK;
1863 work_ast_lock = ldlm_work_gl_ast_lock;
1869 /* We create a ptlrpc request set with flow control extension.
1870 * This request set will use the work_ast_lock function to produce new
1871 * requests and will send a new request each time one completes in order
1872 * to keep the number of requests in flight to ns_max_parallel_ast */
1873 arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
1874 work_ast_lock, arg);
1875 if (arg->set == NULL)
1876 GOTO(out, rc = -ENOMEM);
1878 ptlrpc_set_wait(arg->set);
1879 ptlrpc_set_destroy(arg->set);
1881 rc = atomic_read(&arg->restart) ? -ERESTART : 0;
1888 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
1890 ldlm_reprocess_all(res);
1891 return LDLM_ITER_CONTINUE;
1894 static int ldlm_reprocess_res(cfs_hash_t *hs, cfs_hash_bd_t *bd,
1895 struct hlist_node *hnode, void *arg)
1897 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1900 rc = reprocess_one_queue(res, arg);
1902 return rc == LDLM_ITER_STOP;
1906 * Iterate through all resources on a namespace attempting to grant waiting
1909 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
1912 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1913 ldlm_reprocess_res, NULL);
1916 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1919 * Try to grant all waiting locks on a resource.
1921 * Calls ldlm_reprocess_queue on converting and waiting queues.
1923 * Typically called after some resource locks are cancelled to see
1924 * if anything could be granted as a result of the cancellation.
1926 void ldlm_reprocess_all(struct ldlm_resource *res)
1928 LIST_HEAD(rpc_list);
1930 if (!ns_is_client(ldlm_res_to_ns(res))) {
1931 CERROR("This is client-side-only module, cannot handle "
1932 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1938 * Helper function to call blocking AST for LDLM lock \a lock in a
1939 * "cancelling" mode.
1941 void ldlm_cancel_callback(struct ldlm_lock *lock)
1943 check_res_locked(lock->l_resource);
1944 if (!(lock->l_flags & LDLM_FL_CANCEL)) {
1945 lock->l_flags |= LDLM_FL_CANCEL;
1946 if (lock->l_blocking_ast) {
1947 unlock_res_and_lock(lock);
1948 lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
1950 lock_res_and_lock(lock);
1952 LDLM_DEBUG(lock, "no blocking ast");
1955 lock->l_flags |= LDLM_FL_BL_DONE;
1959 * Remove skiplist-enabled LDLM lock \a req from granted list
1961 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req)
1963 if (req->l_resource->lr_type != LDLM_PLAIN &&
1964 req->l_resource->lr_type != LDLM_IBITS)
1967 list_del_init(&req->l_sl_policy);
1968 list_del_init(&req->l_sl_mode);
1972 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
1974 void ldlm_lock_cancel(struct ldlm_lock *lock)
1976 struct ldlm_resource *res;
1977 struct ldlm_namespace *ns;
1979 lock_res_and_lock(lock);
1981 res = lock->l_resource;
1982 ns = ldlm_res_to_ns(res);
1984 /* Please do not, no matter how tempting, remove this LBUG without
1985 * talking to me first. -phik */
1986 if (lock->l_readers || lock->l_writers) {
1987 LDLM_ERROR(lock, "lock still has references");
1991 if (lock->l_flags & LDLM_FL_WAITED)
1992 ldlm_del_waiting_lock(lock);
1994 /* Releases cancel callback. */
1995 ldlm_cancel_callback(lock);
1997 /* Yes, second time, just in case it was added again while we were
1998 * running with no res lock in ldlm_cancel_callback */
1999 if (lock->l_flags & LDLM_FL_WAITED)
2000 ldlm_del_waiting_lock(lock);
2002 ldlm_resource_unlink_lock(lock);
2003 ldlm_lock_destroy_nolock(lock);
2005 if (lock->l_granted_mode == lock->l_req_mode)
2006 ldlm_pool_del(&ns->ns_pool, lock);
2008 /* Make sure we will not be called again for same lock what is possible
2009 * if not to zero out lock->l_granted_mode */
2010 lock->l_granted_mode = LCK_MINMODE;
2011 unlock_res_and_lock(lock);
2013 EXPORT_SYMBOL(ldlm_lock_cancel);
2016 * Set opaque data into the lock that only makes sense to upper layer.
2018 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
2020 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2024 if (lock->l_ast_data == NULL)
2025 lock->l_ast_data = data;
2026 if (lock->l_ast_data == data)
2028 LDLM_LOCK_PUT(lock);
2032 EXPORT_SYMBOL(ldlm_lock_set_data);
2034 struct export_cl_data {
2035 struct obd_export *ecl_exp;
2040 * Iterator function for ldlm_cancel_locks_for_export.
2041 * Cancels passed locks.
2043 int ldlm_cancel_locks_for_export_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2044 struct hlist_node *hnode, void *data)
2047 struct export_cl_data *ecl = (struct export_cl_data *)data;
2048 struct obd_export *exp = ecl->ecl_exp;
2049 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2050 struct ldlm_resource *res;
2052 res = ldlm_resource_getref(lock->l_resource);
2053 LDLM_LOCK_GET(lock);
2055 LDLM_DEBUG(lock, "export %p", exp);
2056 ldlm_res_lvbo_update(res, NULL, 1);
2057 ldlm_lock_cancel(lock);
2058 ldlm_reprocess_all(res);
2059 ldlm_resource_putref(res);
2060 LDLM_LOCK_RELEASE(lock);
2063 if ((ecl->ecl_loop & -ecl->ecl_loop) == ecl->ecl_loop) {
2065 "Cancel lock %p for export %p (loop %d), still have "
2066 "%d locks left on hash table.\n",
2067 lock, exp, ecl->ecl_loop,
2068 atomic_read(&hs->hs_count));
2075 * Cancel all locks for given export.
2077 * Typically called on client disconnection/eviction
2079 void ldlm_cancel_locks_for_export(struct obd_export *exp)
2081 struct export_cl_data ecl = {
2086 cfs_hash_for_each_empty(exp->exp_lock_hash,
2087 ldlm_cancel_locks_for_export_cb, &ecl);
2091 * Downgrade an exclusive lock.
2093 * A fast variant of ldlm_lock_convert for convertion of exclusive
2094 * locks. The convertion is always successful.
2095 * Used by Commit on Sharing (COS) code.
2097 * \param lock A lock to convert
2098 * \param new_mode new lock mode
2100 void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
2102 LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
2103 LASSERT(new_mode == LCK_COS);
2105 lock_res_and_lock(lock);
2106 ldlm_resource_unlink_lock(lock);
2108 * Remove the lock from pool as it will be added again in
2109 * ldlm_grant_lock() called below.
2111 ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
2113 lock->l_req_mode = new_mode;
2114 ldlm_grant_lock(lock, NULL);
2115 unlock_res_and_lock(lock);
2116 ldlm_reprocess_all(lock->l_resource);
2118 EXPORT_SYMBOL(ldlm_lock_downgrade);
2121 * Attempt to convert already granted lock to a different mode.
2123 * While lock conversion is not currently used, future client-side
2124 * optimizations could take advantage of it to avoid discarding cached
2127 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
2130 LIST_HEAD(rpc_list);
2131 struct ldlm_resource *res;
2132 struct ldlm_namespace *ns;
2134 struct ldlm_interval *node;
2136 /* Just return if mode is unchanged. */
2137 if (new_mode == lock->l_granted_mode) {
2138 *flags |= LDLM_FL_BLOCK_GRANTED;
2139 return lock->l_resource;
2142 /* I can't check the type of lock here because the bitlock of lock
2143 * is not held here, so do the allocation blindly. -jay */
2144 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
2146 /* Actually, this causes EDEADLOCK to be returned */
2149 LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
2150 "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
2152 lock_res_and_lock(lock);
2154 res = lock->l_resource;
2155 ns = ldlm_res_to_ns(res);
2157 lock->l_req_mode = new_mode;
2158 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
2159 ldlm_resource_unlink_lock(lock);
2161 ldlm_resource_unlink_lock(lock);
2162 if (res->lr_type == LDLM_EXTENT) {
2163 /* FIXME: ugly code, I have to attach the lock to a
2164 * interval node again since perhaps it will be granted
2166 INIT_LIST_HEAD(&node->li_group);
2167 ldlm_interval_attach(node, lock);
2173 * Remove old lock from the pool before adding the lock with new
2174 * mode below in ->policy()
2176 ldlm_pool_del(&ns->ns_pool, lock);
2178 /* If this is a local resource, put it on the appropriate list. */
2179 if (ns_is_client(ldlm_res_to_ns(res))) {
2180 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
2181 ldlm_resource_add_lock(res, &res->lr_converting, lock);
2183 /* This should never happen, because of the way the
2184 * server handles conversions. */
2185 LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
2189 ldlm_grant_lock(lock, &rpc_list);
2191 /* FIXME: completion handling not with lr_lock held ! */
2192 if (lock->l_completion_ast)
2193 lock->l_completion_ast(lock, 0, NULL);
2196 CERROR("This is client-side-only module, cannot handle "
2197 "LDLM_NAMESPACE_SERVER resource type lock.\n");
2200 unlock_res_and_lock(lock);
2203 ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
2205 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
2208 EXPORT_SYMBOL(ldlm_lock_convert);
2211 * Print lock with lock handle \a lockh description into debug log.
2213 * Used when printing all locks on a resource for debug purposes.
2215 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
2217 struct ldlm_lock *lock;
2219 if (!((libcfs_debug | D_ERROR) & level))
2222 lock = ldlm_handle2lock(lockh);
2226 LDLM_DEBUG_LIMIT(level, lock, "###");
2228 LDLM_LOCK_PUT(lock);
2230 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2233 * Print lock information with custom message into debug log.
2236 void _ldlm_lock_debug(struct ldlm_lock *lock,
2237 struct libcfs_debug_msg_data *msgdata,
2238 const char *fmt, ...)
2241 struct obd_export *exp = lock->l_export;
2242 struct ldlm_resource *resource = lock->l_resource;
2243 char *nid = "local";
2245 va_start(args, fmt);
2247 if (exp && exp->exp_connection) {
2248 nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
2249 } else if (exp && exp->exp_obd != NULL) {
2250 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
2251 nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
2254 if (resource == NULL) {
2255 libcfs_debug_vmsg2(msgdata, fmt, args,
2256 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2257 "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" nid: %s "
2258 "remote: "LPX64" expref: %d pid: %u timeout: %lu "
2261 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2262 lock->l_readers, lock->l_writers,
2263 ldlm_lockname[lock->l_granted_mode],
2264 ldlm_lockname[lock->l_req_mode],
2265 lock->l_flags, nid, lock->l_remote_handle.cookie,
2266 exp ? atomic_read(&exp->exp_refcount) : -99,
2267 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2272 switch (resource->lr_type) {
2274 libcfs_debug_vmsg2(msgdata, fmt, args,
2275 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2276 "res: "DLDLMRES" rrc: %d type: %s ["LPU64"->"LPU64"] "
2277 "(req "LPU64"->"LPU64") flags: "LPX64" nid: %s remote: "
2278 LPX64" expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2279 ldlm_lock_to_ns_name(lock), lock,
2280 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2281 lock->l_readers, lock->l_writers,
2282 ldlm_lockname[lock->l_granted_mode],
2283 ldlm_lockname[lock->l_req_mode],
2285 atomic_read(&resource->lr_refcount),
2286 ldlm_typename[resource->lr_type],
2287 lock->l_policy_data.l_extent.start,
2288 lock->l_policy_data.l_extent.end,
2289 lock->l_req_extent.start, lock->l_req_extent.end,
2290 lock->l_flags, nid, lock->l_remote_handle.cookie,
2291 exp ? atomic_read(&exp->exp_refcount) : -99,
2292 lock->l_pid, lock->l_callback_timeout,
2297 libcfs_debug_vmsg2(msgdata, fmt, args,
2298 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2299 "res: "DLDLMRES" rrc: %d type: %s pid: %d "
2300 "["LPU64"->"LPU64"] flags: "LPX64" nid: %s "
2301 "remote: "LPX64" expref: %d pid: %u timeout: %lu\n",
2302 ldlm_lock_to_ns_name(lock), lock,
2303 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2304 lock->l_readers, lock->l_writers,
2305 ldlm_lockname[lock->l_granted_mode],
2306 ldlm_lockname[lock->l_req_mode],
2308 atomic_read(&resource->lr_refcount),
2309 ldlm_typename[resource->lr_type],
2310 lock->l_policy_data.l_flock.pid,
2311 lock->l_policy_data.l_flock.start,
2312 lock->l_policy_data.l_flock.end,
2313 lock->l_flags, nid, lock->l_remote_handle.cookie,
2314 exp ? atomic_read(&exp->exp_refcount) : -99,
2315 lock->l_pid, lock->l_callback_timeout);
2319 libcfs_debug_vmsg2(msgdata, fmt, args,
2320 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2321 "res: "DLDLMRES" bits "LPX64" rrc: %d type: %s "
2322 "flags: "LPX64" nid: %s remote: "LPX64" expref: %d "
2323 "pid: %u timeout: %lu lvb_type: %d\n",
2324 ldlm_lock_to_ns_name(lock),
2325 lock, lock->l_handle.h_cookie,
2326 atomic_read(&lock->l_refc),
2327 lock->l_readers, lock->l_writers,
2328 ldlm_lockname[lock->l_granted_mode],
2329 ldlm_lockname[lock->l_req_mode],
2331 lock->l_policy_data.l_inodebits.bits,
2332 atomic_read(&resource->lr_refcount),
2333 ldlm_typename[resource->lr_type],
2334 lock->l_flags, nid, lock->l_remote_handle.cookie,
2335 exp ? atomic_read(&exp->exp_refcount) : -99,
2336 lock->l_pid, lock->l_callback_timeout,
2341 libcfs_debug_vmsg2(msgdata, fmt, args,
2342 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2343 "res: "DLDLMRES" rrc: %d type: %s flags: "LPX64" "
2344 "nid: %s remote: "LPX64" expref: %d pid: %u "
2345 "timeout: %lu lvb_type: %d\n",
2346 ldlm_lock_to_ns_name(lock),
2347 lock, lock->l_handle.h_cookie,
2348 atomic_read(&lock->l_refc),
2349 lock->l_readers, lock->l_writers,
2350 ldlm_lockname[lock->l_granted_mode],
2351 ldlm_lockname[lock->l_req_mode],
2353 atomic_read(&resource->lr_refcount),
2354 ldlm_typename[resource->lr_type],
2355 lock->l_flags, nid, lock->l_remote_handle.cookie,
2356 exp ? atomic_read(&exp->exp_refcount) : -99,
2357 lock->l_pid, lock->l_callback_timeout,
2363 EXPORT_SYMBOL(_ldlm_lock_debug);