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 /* Check if this lock can be matched.
1133 * Used by LU-2919(exclusive open) for open lease lock */
1134 if (ldlm_is_excl(lock))
1137 /* llite sometimes wants to match locks that will be
1138 * canceled when their users drop, but we allow it to match
1139 * if it passes in CBPENDING and the lock still has users.
1140 * this is generally only going to be used by children
1141 * whose parents already hold a lock so forward progress
1142 * can still happen. */
1143 if (lock->l_flags & LDLM_FL_CBPENDING &&
1144 !(flags & LDLM_FL_CBPENDING))
1146 if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
1147 lock->l_readers == 0 && lock->l_writers == 0)
1150 if (!(lock->l_req_mode & *mode))
1152 match = lock->l_req_mode;
1154 if (lock->l_resource->lr_type == LDLM_EXTENT &&
1155 (lock->l_policy_data.l_extent.start >
1156 policy->l_extent.start ||
1157 lock->l_policy_data.l_extent.end < policy->l_extent.end))
1160 if (unlikely(match == LCK_GROUP) &&
1161 lock->l_resource->lr_type == LDLM_EXTENT &&
1162 lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
1165 /* We match if we have existing lock with same or wider set
1167 if (lock->l_resource->lr_type == LDLM_IBITS &&
1168 ((lock->l_policy_data.l_inodebits.bits &
1169 policy->l_inodebits.bits) !=
1170 policy->l_inodebits.bits))
1173 if (!unref && (lock->l_flags & LDLM_FL_GONE_MASK))
1176 if ((flags & LDLM_FL_LOCAL_ONLY) &&
1177 !(lock->l_flags & LDLM_FL_LOCAL))
1180 if (flags & LDLM_FL_TEST_LOCK) {
1181 LDLM_LOCK_GET(lock);
1182 ldlm_lock_touch_in_lru(lock);
1184 ldlm_lock_addref_internal_nolock(lock, match);
1193 void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
1195 if ((lock->l_flags & LDLM_FL_FAIL_NOTIFIED) == 0) {
1196 lock->l_flags |= LDLM_FL_FAIL_NOTIFIED;
1197 wake_up_all(&lock->l_waitq);
1200 EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
1202 void ldlm_lock_fail_match(struct ldlm_lock *lock)
1204 lock_res_and_lock(lock);
1205 ldlm_lock_fail_match_locked(lock);
1206 unlock_res_and_lock(lock);
1208 EXPORT_SYMBOL(ldlm_lock_fail_match);
1211 * Mark lock as "matchable" by OST.
1213 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1215 * Assumes LDLM lock is already locked.
1217 void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
1219 lock->l_flags |= LDLM_FL_LVB_READY;
1220 wake_up_all(&lock->l_waitq);
1222 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
1225 * Mark lock as "matchable" by OST.
1226 * Locks the lock and then \see ldlm_lock_allow_match_locked
1228 void ldlm_lock_allow_match(struct ldlm_lock *lock)
1230 lock_res_and_lock(lock);
1231 ldlm_lock_allow_match_locked(lock);
1232 unlock_res_and_lock(lock);
1234 EXPORT_SYMBOL(ldlm_lock_allow_match);
1237 * Attempt to find a lock with specified properties.
1239 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1242 * Can be called in two ways:
1244 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1245 * for a duplicate of.
1247 * Otherwise, all of the fields must be filled in, to match against.
1249 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1250 * server (ie, connh is NULL)
1251 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1252 * list will be considered
1253 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1254 * to be canceled can still be matched as long as they still have reader
1255 * or writer refernces
1256 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1257 * just tell us if we would have matched.
1259 * \retval 1 if it finds an already-existing lock that is compatible; in this
1260 * case, lockh is filled in with a addref()ed lock
1262 * We also check security context, and if that fails we simply return 0 (to
1263 * keep caller code unchanged), the context failure will be discovered by
1264 * caller sometime later.
1266 ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
1267 const struct ldlm_res_id *res_id, ldlm_type_t type,
1268 ldlm_policy_data_t *policy, ldlm_mode_t mode,
1269 struct lustre_handle *lockh, int unref)
1271 struct ldlm_resource *res;
1272 struct ldlm_lock *lock, *old_lock = NULL;
1276 old_lock = ldlm_handle2lock(lockh);
1279 ns = ldlm_lock_to_ns(old_lock);
1280 res_id = &old_lock->l_resource->lr_name;
1281 type = old_lock->l_resource->lr_type;
1282 mode = old_lock->l_req_mode;
1285 res = ldlm_resource_get(ns, NULL, res_id, type, 0);
1287 LASSERT(old_lock == NULL);
1291 LDLM_RESOURCE_ADDREF(res);
1294 lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
1298 if (flags & LDLM_FL_BLOCK_GRANTED)
1300 lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
1304 lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
1311 LDLM_RESOURCE_DELREF(res);
1312 ldlm_resource_putref(res);
1315 ldlm_lock2handle(lock, lockh);
1316 if ((flags & LDLM_FL_LVB_READY) &&
1317 (!(lock->l_flags & LDLM_FL_LVB_READY))) {
1318 __u64 wait_flags = LDLM_FL_LVB_READY |
1319 LDLM_FL_DESTROYED | LDLM_FL_FAIL_NOTIFIED;
1320 struct l_wait_info lwi;
1321 if (lock->l_completion_ast) {
1322 int err = lock->l_completion_ast(lock,
1323 LDLM_FL_WAIT_NOREPROC,
1326 if (flags & LDLM_FL_TEST_LOCK)
1327 LDLM_LOCK_RELEASE(lock);
1329 ldlm_lock_decref_internal(lock,
1336 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
1337 NULL, LWI_ON_SIGNAL_NOOP, NULL);
1339 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1340 l_wait_event(lock->l_waitq,
1341 lock->l_flags & wait_flags,
1343 if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
1344 if (flags & LDLM_FL_TEST_LOCK)
1345 LDLM_LOCK_RELEASE(lock);
1347 ldlm_lock_decref_internal(lock, mode);
1354 LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
1355 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1356 res_id->name[2] : policy->l_extent.start,
1357 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1358 res_id->name[3] : policy->l_extent.end);
1360 /* check user's security context */
1361 if (lock->l_conn_export &&
1362 sptlrpc_import_check_ctx(
1363 class_exp2cliimp(lock->l_conn_export))) {
1364 if (!(flags & LDLM_FL_TEST_LOCK))
1365 ldlm_lock_decref_internal(lock, mode);
1369 if (flags & LDLM_FL_TEST_LOCK)
1370 LDLM_LOCK_RELEASE(lock);
1372 } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
1373 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
1374 LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
1375 type, mode, res_id->name[0], res_id->name[1],
1376 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1377 res_id->name[2] :policy->l_extent.start,
1378 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1379 res_id->name[3] : policy->l_extent.end);
1382 LDLM_LOCK_PUT(old_lock);
1384 return rc ? mode : 0;
1386 EXPORT_SYMBOL(ldlm_lock_match);
1388 ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
1391 struct ldlm_lock *lock;
1392 ldlm_mode_t mode = 0;
1394 lock = ldlm_handle2lock(lockh);
1396 lock_res_and_lock(lock);
1397 if (lock->l_flags & LDLM_FL_GONE_MASK)
1400 if (lock->l_flags & LDLM_FL_CBPENDING &&
1401 lock->l_readers == 0 && lock->l_writers == 0)
1405 *bits = lock->l_policy_data.l_inodebits.bits;
1406 mode = lock->l_granted_mode;
1407 ldlm_lock_addref_internal_nolock(lock, mode);
1412 unlock_res_and_lock(lock);
1413 LDLM_LOCK_PUT(lock);
1417 EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
1419 /** The caller must guarantee that the buffer is large enough. */
1420 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
1421 enum req_location loc, void *data, int size)
1425 LASSERT(data != NULL);
1428 switch (lock->l_lvb_type) {
1430 if (size == sizeof(struct ost_lvb)) {
1431 if (loc == RCL_CLIENT)
1432 lvb = req_capsule_client_swab_get(pill,
1434 lustre_swab_ost_lvb);
1436 lvb = req_capsule_server_swab_get(pill,
1438 lustre_swab_ost_lvb);
1439 if (unlikely(lvb == NULL)) {
1440 LDLM_ERROR(lock, "no LVB");
1444 memcpy(data, lvb, size);
1445 } else if (size == sizeof(struct ost_lvb_v1)) {
1446 struct ost_lvb *olvb = data;
1448 if (loc == RCL_CLIENT)
1449 lvb = req_capsule_client_swab_get(pill,
1451 lustre_swab_ost_lvb_v1);
1453 lvb = req_capsule_server_sized_swab_get(pill,
1455 lustre_swab_ost_lvb_v1);
1456 if (unlikely(lvb == NULL)) {
1457 LDLM_ERROR(lock, "no LVB");
1461 memcpy(data, lvb, size);
1462 olvb->lvb_mtime_ns = 0;
1463 olvb->lvb_atime_ns = 0;
1464 olvb->lvb_ctime_ns = 0;
1466 LDLM_ERROR(lock, "Replied unexpected ost LVB size %d",
1472 if (size == sizeof(struct lquota_lvb)) {
1473 if (loc == RCL_CLIENT)
1474 lvb = req_capsule_client_swab_get(pill,
1476 lustre_swab_lquota_lvb);
1478 lvb = req_capsule_server_swab_get(pill,
1480 lustre_swab_lquota_lvb);
1481 if (unlikely(lvb == NULL)) {
1482 LDLM_ERROR(lock, "no LVB");
1486 memcpy(data, lvb, size);
1488 LDLM_ERROR(lock, "Replied unexpected lquota LVB size %d",
1497 if (loc == RCL_CLIENT)
1498 lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
1500 lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
1501 if (unlikely(lvb == NULL)) {
1502 LDLM_ERROR(lock, "no LVB");
1506 memcpy(data, lvb, size);
1509 LDLM_ERROR(lock, "Unknown LVB type: %d\n", lock->l_lvb_type);
1518 * Create and fill in new LDLM lock with specified properties.
1519 * Returns a referenced lock
1521 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
1522 const struct ldlm_res_id *res_id,
1525 const struct ldlm_callback_suite *cbs,
1526 void *data, __u32 lvb_len,
1527 enum lvb_type lvb_type)
1529 struct ldlm_lock *lock;
1530 struct ldlm_resource *res;
1532 res = ldlm_resource_get(ns, NULL, res_id, type, 1);
1536 lock = ldlm_lock_new(res);
1541 lock->l_req_mode = mode;
1542 lock->l_ast_data = data;
1543 lock->l_pid = current_pid();
1544 if (ns_is_server(ns))
1545 lock->l_flags |= LDLM_FL_NS_SRV;
1547 lock->l_blocking_ast = cbs->lcs_blocking;
1548 lock->l_completion_ast = cbs->lcs_completion;
1549 lock->l_glimpse_ast = cbs->lcs_glimpse;
1552 lock->l_tree_node = NULL;
1553 /* if this is the extent lock, allocate the interval tree node */
1554 if (type == LDLM_EXTENT) {
1555 if (ldlm_interval_alloc(lock) == NULL)
1560 lock->l_lvb_len = lvb_len;
1561 OBD_ALLOC(lock->l_lvb_data, lvb_len);
1562 if (lock->l_lvb_data == NULL)
1566 lock->l_lvb_type = lvb_type;
1567 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
1573 ldlm_lock_destroy(lock);
1574 LDLM_LOCK_RELEASE(lock);
1579 * Enqueue (request) a lock.
1581 * Does not block. As a result of enqueue the lock would be put
1582 * into granted or waiting list.
1584 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1585 * set, skip all the enqueueing and delegate lock processing to intent policy
1588 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
1589 struct ldlm_lock **lockp,
1590 void *cookie, __u64 *flags)
1592 struct ldlm_lock *lock = *lockp;
1593 struct ldlm_resource *res = lock->l_resource;
1594 int local = ns_is_client(ldlm_res_to_ns(res));
1595 ldlm_error_t rc = ELDLM_OK;
1596 struct ldlm_interval *node = NULL;
1598 lock->l_last_activity = cfs_time_current_sec();
1599 /* policies are not executed on the client or during replay */
1600 if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
1601 && !local && ns->ns_policy) {
1602 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
1604 if (rc == ELDLM_LOCK_REPLACED) {
1605 /* The lock that was returned has already been granted,
1606 * and placed into lockp. If it's not the same as the
1607 * one we passed in, then destroy the old one and our
1608 * work here is done. */
1609 if (lock != *lockp) {
1610 ldlm_lock_destroy(lock);
1611 LDLM_LOCK_RELEASE(lock);
1613 *flags |= LDLM_FL_LOCK_CHANGED;
1615 } else if (rc != ELDLM_OK ||
1616 (rc == ELDLM_OK && (*flags & LDLM_FL_INTENT_ONLY))) {
1617 ldlm_lock_destroy(lock);
1622 /* For a replaying lock, it might be already in granted list. So
1623 * unlinking the lock will cause the interval node to be freed, we
1624 * have to allocate the interval node early otherwise we can't regrant
1625 * this lock in the future. - jay */
1626 if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
1627 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
1629 lock_res_and_lock(lock);
1630 if (local && lock->l_req_mode == lock->l_granted_mode) {
1631 /* The server returned a blocked lock, but it was granted
1632 * before we got a chance to actually enqueue it. We don't
1633 * need to do anything else. */
1634 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
1635 LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
1636 GOTO(out, ELDLM_OK);
1639 ldlm_resource_unlink_lock(lock);
1640 if (res->lr_type == LDLM_EXTENT && lock->l_tree_node == NULL) {
1642 ldlm_lock_destroy_nolock(lock);
1643 GOTO(out, rc = -ENOMEM);
1646 INIT_LIST_HEAD(&node->li_group);
1647 ldlm_interval_attach(node, lock);
1651 /* Some flags from the enqueue want to make it into the AST, via the
1652 * lock's l_flags. */
1653 lock->l_flags |= *flags & LDLM_FL_AST_DISCARD_DATA;
1655 /* This distinction between local lock trees is very important; a client
1656 * namespace only has information about locks taken by that client, and
1657 * thus doesn't have enough information to decide for itself if it can
1658 * be granted (below). In this case, we do exactly what the server
1659 * tells us to do, as dictated by the 'flags'.
1661 * We do exactly the same thing during recovery, when the server is
1662 * more or less trusting the clients not to lie.
1664 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1665 * granted/converting queues. */
1667 if (*flags & LDLM_FL_BLOCK_CONV)
1668 ldlm_resource_add_lock(res, &res->lr_converting, lock);
1669 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
1670 ldlm_resource_add_lock(res, &res->lr_waiting, lock);
1672 ldlm_grant_lock(lock, NULL);
1673 GOTO(out, ELDLM_OK);
1675 CERROR("This is client-side-only module, cannot handle "
1676 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1681 unlock_res_and_lock(lock);
1683 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
1689 * Process a call to blocking AST callback for a lock in ast_work list
1692 ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1694 struct ldlm_cb_set_arg *arg = opaq;
1695 struct ldlm_lock_desc d;
1697 struct ldlm_lock *lock;
1699 if (list_empty(arg->list))
1702 lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
1704 /* nobody should touch l_bl_ast */
1705 lock_res_and_lock(lock);
1706 list_del_init(&lock->l_bl_ast);
1708 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1709 LASSERT(lock->l_bl_ast_run == 0);
1710 LASSERT(lock->l_blocking_lock);
1711 lock->l_bl_ast_run++;
1712 unlock_res_and_lock(lock);
1714 ldlm_lock2desc(lock->l_blocking_lock, &d);
1716 rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
1717 LDLM_LOCK_RELEASE(lock->l_blocking_lock);
1718 lock->l_blocking_lock = NULL;
1719 LDLM_LOCK_RELEASE(lock);
1725 * Process a call to completion AST callback for a lock in ast_work list
1728 ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1730 struct ldlm_cb_set_arg *arg = opaq;
1732 struct ldlm_lock *lock;
1733 ldlm_completion_callback completion_callback;
1735 if (list_empty(arg->list))
1738 lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
1740 /* It's possible to receive a completion AST before we've set
1741 * the l_completion_ast pointer: either because the AST arrived
1742 * before the reply, or simply because there's a small race
1743 * window between receiving the reply and finishing the local
1744 * enqueue. (bug 842)
1746 * This can't happen with the blocking_ast, however, because we
1747 * will never call the local blocking_ast until we drop our
1748 * reader/writer reference, which we won't do until we get the
1749 * reply and finish enqueueing. */
1751 /* nobody should touch l_cp_ast */
1752 lock_res_and_lock(lock);
1753 list_del_init(&lock->l_cp_ast);
1754 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1755 /* save l_completion_ast since it can be changed by
1756 * mds_intent_policy(), see bug 14225 */
1757 completion_callback = lock->l_completion_ast;
1758 lock->l_flags &= ~LDLM_FL_CP_REQD;
1759 unlock_res_and_lock(lock);
1761 if (completion_callback != NULL)
1762 rc = completion_callback(lock, 0, (void *)arg);
1763 LDLM_LOCK_RELEASE(lock);
1769 * Process a call to revocation AST callback for a lock in ast_work list
1772 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1774 struct ldlm_cb_set_arg *arg = opaq;
1775 struct ldlm_lock_desc desc;
1777 struct ldlm_lock *lock;
1779 if (list_empty(arg->list))
1782 lock = list_entry(arg->list->next, struct ldlm_lock, l_rk_ast);
1783 list_del_init(&lock->l_rk_ast);
1785 /* the desc just pretend to exclusive */
1786 ldlm_lock2desc(lock, &desc);
1787 desc.l_req_mode = LCK_EX;
1788 desc.l_granted_mode = 0;
1790 rc = lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
1791 LDLM_LOCK_RELEASE(lock);
1797 * Process a call to glimpse AST callback for a lock in ast_work list
1799 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1801 struct ldlm_cb_set_arg *arg = opaq;
1802 struct ldlm_glimpse_work *gl_work;
1803 struct ldlm_lock *lock;
1806 if (list_empty(arg->list))
1809 gl_work = list_entry(arg->list->next, struct ldlm_glimpse_work,
1811 list_del_init(&gl_work->gl_list);
1813 lock = gl_work->gl_lock;
1815 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1816 arg->gl_desc = gl_work->gl_desc;
1818 /* invoke the actual glimpse callback */
1819 if (lock->l_glimpse_ast(lock, (void*)arg) == 0)
1822 LDLM_LOCK_RELEASE(lock);
1824 if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
1825 OBD_FREE_PTR(gl_work);
1831 * Process list of locks in need of ASTs being sent.
1833 * Used on server to send multiple ASTs together instead of sending one by
1836 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
1837 ldlm_desc_ast_t ast_type)
1839 struct ldlm_cb_set_arg *arg;
1840 set_producer_func work_ast_lock;
1843 if (list_empty(rpc_list))
1850 atomic_set(&arg->restart, 0);
1851 arg->list = rpc_list;
1854 case LDLM_WORK_BL_AST:
1855 arg->type = LDLM_BL_CALLBACK;
1856 work_ast_lock = ldlm_work_bl_ast_lock;
1858 case LDLM_WORK_CP_AST:
1859 arg->type = LDLM_CP_CALLBACK;
1860 work_ast_lock = ldlm_work_cp_ast_lock;
1862 case LDLM_WORK_REVOKE_AST:
1863 arg->type = LDLM_BL_CALLBACK;
1864 work_ast_lock = ldlm_work_revoke_ast_lock;
1866 case LDLM_WORK_GL_AST:
1867 arg->type = LDLM_GL_CALLBACK;
1868 work_ast_lock = ldlm_work_gl_ast_lock;
1874 /* We create a ptlrpc request set with flow control extension.
1875 * This request set will use the work_ast_lock function to produce new
1876 * requests and will send a new request each time one completes in order
1877 * to keep the number of requests in flight to ns_max_parallel_ast */
1878 arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
1879 work_ast_lock, arg);
1880 if (arg->set == NULL)
1881 GOTO(out, rc = -ENOMEM);
1883 ptlrpc_set_wait(arg->set);
1884 ptlrpc_set_destroy(arg->set);
1886 rc = atomic_read(&arg->restart) ? -ERESTART : 0;
1893 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
1895 ldlm_reprocess_all(res);
1896 return LDLM_ITER_CONTINUE;
1899 static int ldlm_reprocess_res(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1900 struct hlist_node *hnode, void *arg)
1902 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1905 rc = reprocess_one_queue(res, arg);
1907 return rc == LDLM_ITER_STOP;
1911 * Iterate through all resources on a namespace attempting to grant waiting
1914 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
1917 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1918 ldlm_reprocess_res, NULL);
1921 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1924 * Try to grant all waiting locks on a resource.
1926 * Calls ldlm_reprocess_queue on converting and waiting queues.
1928 * Typically called after some resource locks are cancelled to see
1929 * if anything could be granted as a result of the cancellation.
1931 void ldlm_reprocess_all(struct ldlm_resource *res)
1933 LIST_HEAD(rpc_list);
1935 if (!ns_is_client(ldlm_res_to_ns(res))) {
1936 CERROR("This is client-side-only module, cannot handle "
1937 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1943 * Helper function to call blocking AST for LDLM lock \a lock in a
1944 * "cancelling" mode.
1946 void ldlm_cancel_callback(struct ldlm_lock *lock)
1948 check_res_locked(lock->l_resource);
1949 if (!(lock->l_flags & LDLM_FL_CANCEL)) {
1950 lock->l_flags |= LDLM_FL_CANCEL;
1951 if (lock->l_blocking_ast) {
1952 unlock_res_and_lock(lock);
1953 lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
1955 lock_res_and_lock(lock);
1957 LDLM_DEBUG(lock, "no blocking ast");
1960 lock->l_flags |= LDLM_FL_BL_DONE;
1964 * Remove skiplist-enabled LDLM lock \a req from granted list
1966 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req)
1968 if (req->l_resource->lr_type != LDLM_PLAIN &&
1969 req->l_resource->lr_type != LDLM_IBITS)
1972 list_del_init(&req->l_sl_policy);
1973 list_del_init(&req->l_sl_mode);
1977 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
1979 void ldlm_lock_cancel(struct ldlm_lock *lock)
1981 struct ldlm_resource *res;
1982 struct ldlm_namespace *ns;
1984 lock_res_and_lock(lock);
1986 res = lock->l_resource;
1987 ns = ldlm_res_to_ns(res);
1989 /* Please do not, no matter how tempting, remove this LBUG without
1990 * talking to me first. -phik */
1991 if (lock->l_readers || lock->l_writers) {
1992 LDLM_ERROR(lock, "lock still has references");
1996 if (lock->l_flags & LDLM_FL_WAITED)
1997 ldlm_del_waiting_lock(lock);
1999 /* Releases cancel callback. */
2000 ldlm_cancel_callback(lock);
2002 /* Yes, second time, just in case it was added again while we were
2003 * running with no res lock in ldlm_cancel_callback */
2004 if (lock->l_flags & LDLM_FL_WAITED)
2005 ldlm_del_waiting_lock(lock);
2007 ldlm_resource_unlink_lock(lock);
2008 ldlm_lock_destroy_nolock(lock);
2010 if (lock->l_granted_mode == lock->l_req_mode)
2011 ldlm_pool_del(&ns->ns_pool, lock);
2013 /* Make sure we will not be called again for same lock what is possible
2014 * if not to zero out lock->l_granted_mode */
2015 lock->l_granted_mode = LCK_MINMODE;
2016 unlock_res_and_lock(lock);
2018 EXPORT_SYMBOL(ldlm_lock_cancel);
2021 * Set opaque data into the lock that only makes sense to upper layer.
2023 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
2025 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2029 if (lock->l_ast_data == NULL)
2030 lock->l_ast_data = data;
2031 if (lock->l_ast_data == data)
2033 LDLM_LOCK_PUT(lock);
2037 EXPORT_SYMBOL(ldlm_lock_set_data);
2039 struct export_cl_data {
2040 struct obd_export *ecl_exp;
2045 * Iterator function for ldlm_cancel_locks_for_export.
2046 * Cancels passed locks.
2048 int ldlm_cancel_locks_for_export_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
2049 struct hlist_node *hnode, void *data)
2052 struct export_cl_data *ecl = (struct export_cl_data *)data;
2053 struct obd_export *exp = ecl->ecl_exp;
2054 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2055 struct ldlm_resource *res;
2057 res = ldlm_resource_getref(lock->l_resource);
2058 LDLM_LOCK_GET(lock);
2060 LDLM_DEBUG(lock, "export %p", exp);
2061 ldlm_res_lvbo_update(res, NULL, 1);
2062 ldlm_lock_cancel(lock);
2063 ldlm_reprocess_all(res);
2064 ldlm_resource_putref(res);
2065 LDLM_LOCK_RELEASE(lock);
2068 if ((ecl->ecl_loop & -ecl->ecl_loop) == ecl->ecl_loop) {
2070 "Cancel lock %p for export %p (loop %d), still have "
2071 "%d locks left on hash table.\n",
2072 lock, exp, ecl->ecl_loop,
2073 atomic_read(&hs->hs_count));
2080 * Cancel all locks for given export.
2082 * Typically called on client disconnection/eviction
2084 void ldlm_cancel_locks_for_export(struct obd_export *exp)
2086 struct export_cl_data ecl = {
2091 cfs_hash_for_each_empty(exp->exp_lock_hash,
2092 ldlm_cancel_locks_for_export_cb, &ecl);
2096 * Downgrade an exclusive lock.
2098 * A fast variant of ldlm_lock_convert for convertion of exclusive
2099 * locks. The convertion is always successful.
2100 * Used by Commit on Sharing (COS) code.
2102 * \param lock A lock to convert
2103 * \param new_mode new lock mode
2105 void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
2107 LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
2108 LASSERT(new_mode == LCK_COS);
2110 lock_res_and_lock(lock);
2111 ldlm_resource_unlink_lock(lock);
2113 * Remove the lock from pool as it will be added again in
2114 * ldlm_grant_lock() called below.
2116 ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
2118 lock->l_req_mode = new_mode;
2119 ldlm_grant_lock(lock, NULL);
2120 unlock_res_and_lock(lock);
2121 ldlm_reprocess_all(lock->l_resource);
2123 EXPORT_SYMBOL(ldlm_lock_downgrade);
2126 * Attempt to convert already granted lock to a different mode.
2128 * While lock conversion is not currently used, future client-side
2129 * optimizations could take advantage of it to avoid discarding cached
2132 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
2135 LIST_HEAD(rpc_list);
2136 struct ldlm_resource *res;
2137 struct ldlm_namespace *ns;
2139 struct ldlm_interval *node;
2141 /* Just return if mode is unchanged. */
2142 if (new_mode == lock->l_granted_mode) {
2143 *flags |= LDLM_FL_BLOCK_GRANTED;
2144 return lock->l_resource;
2147 /* I can't check the type of lock here because the bitlock of lock
2148 * is not held here, so do the allocation blindly. -jay */
2149 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
2151 /* Actually, this causes EDEADLOCK to be returned */
2154 LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
2155 "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
2157 lock_res_and_lock(lock);
2159 res = lock->l_resource;
2160 ns = ldlm_res_to_ns(res);
2162 lock->l_req_mode = new_mode;
2163 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
2164 ldlm_resource_unlink_lock(lock);
2166 ldlm_resource_unlink_lock(lock);
2167 if (res->lr_type == LDLM_EXTENT) {
2168 /* FIXME: ugly code, I have to attach the lock to a
2169 * interval node again since perhaps it will be granted
2171 INIT_LIST_HEAD(&node->li_group);
2172 ldlm_interval_attach(node, lock);
2178 * Remove old lock from the pool before adding the lock with new
2179 * mode below in ->policy()
2181 ldlm_pool_del(&ns->ns_pool, lock);
2183 /* If this is a local resource, put it on the appropriate list. */
2184 if (ns_is_client(ldlm_res_to_ns(res))) {
2185 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
2186 ldlm_resource_add_lock(res, &res->lr_converting, lock);
2188 /* This should never happen, because of the way the
2189 * server handles conversions. */
2190 LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
2194 ldlm_grant_lock(lock, &rpc_list);
2196 /* FIXME: completion handling not with lr_lock held ! */
2197 if (lock->l_completion_ast)
2198 lock->l_completion_ast(lock, 0, NULL);
2201 CERROR("This is client-side-only module, cannot handle "
2202 "LDLM_NAMESPACE_SERVER resource type lock.\n");
2205 unlock_res_and_lock(lock);
2208 ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
2210 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
2213 EXPORT_SYMBOL(ldlm_lock_convert);
2216 * Print lock with lock handle \a lockh description into debug log.
2218 * Used when printing all locks on a resource for debug purposes.
2220 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
2222 struct ldlm_lock *lock;
2224 if (!((libcfs_debug | D_ERROR) & level))
2227 lock = ldlm_handle2lock(lockh);
2231 LDLM_DEBUG_LIMIT(level, lock, "###");
2233 LDLM_LOCK_PUT(lock);
2235 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2238 * Print lock information with custom message into debug log.
2241 void _ldlm_lock_debug(struct ldlm_lock *lock,
2242 struct libcfs_debug_msg_data *msgdata,
2243 const char *fmt, ...)
2246 struct obd_export *exp = lock->l_export;
2247 struct ldlm_resource *resource = lock->l_resource;
2248 char *nid = "local";
2250 va_start(args, fmt);
2252 if (exp && exp->exp_connection) {
2253 nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
2254 } else if (exp && exp->exp_obd != NULL) {
2255 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
2256 nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
2259 if (resource == NULL) {
2260 libcfs_debug_vmsg2(msgdata, fmt, args,
2261 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2262 "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" nid: %s "
2263 "remote: "LPX64" expref: %d pid: %u timeout: %lu "
2266 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2267 lock->l_readers, lock->l_writers,
2268 ldlm_lockname[lock->l_granted_mode],
2269 ldlm_lockname[lock->l_req_mode],
2270 lock->l_flags, nid, lock->l_remote_handle.cookie,
2271 exp ? atomic_read(&exp->exp_refcount) : -99,
2272 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2277 switch (resource->lr_type) {
2279 libcfs_debug_vmsg2(msgdata, fmt, args,
2280 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2281 "res: "DLDLMRES" rrc: %d type: %s ["LPU64"->"LPU64"] "
2282 "(req "LPU64"->"LPU64") flags: "LPX64" nid: %s remote: "
2283 LPX64" expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2284 ldlm_lock_to_ns_name(lock), lock,
2285 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2286 lock->l_readers, lock->l_writers,
2287 ldlm_lockname[lock->l_granted_mode],
2288 ldlm_lockname[lock->l_req_mode],
2290 atomic_read(&resource->lr_refcount),
2291 ldlm_typename[resource->lr_type],
2292 lock->l_policy_data.l_extent.start,
2293 lock->l_policy_data.l_extent.end,
2294 lock->l_req_extent.start, lock->l_req_extent.end,
2295 lock->l_flags, nid, lock->l_remote_handle.cookie,
2296 exp ? atomic_read(&exp->exp_refcount) : -99,
2297 lock->l_pid, lock->l_callback_timeout,
2302 libcfs_debug_vmsg2(msgdata, fmt, args,
2303 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2304 "res: "DLDLMRES" rrc: %d type: %s pid: %d "
2305 "["LPU64"->"LPU64"] flags: "LPX64" nid: %s "
2306 "remote: "LPX64" expref: %d pid: %u timeout: %lu\n",
2307 ldlm_lock_to_ns_name(lock), lock,
2308 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2309 lock->l_readers, lock->l_writers,
2310 ldlm_lockname[lock->l_granted_mode],
2311 ldlm_lockname[lock->l_req_mode],
2313 atomic_read(&resource->lr_refcount),
2314 ldlm_typename[resource->lr_type],
2315 lock->l_policy_data.l_flock.pid,
2316 lock->l_policy_data.l_flock.start,
2317 lock->l_policy_data.l_flock.end,
2318 lock->l_flags, nid, lock->l_remote_handle.cookie,
2319 exp ? atomic_read(&exp->exp_refcount) : -99,
2320 lock->l_pid, lock->l_callback_timeout);
2324 libcfs_debug_vmsg2(msgdata, fmt, args,
2325 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2326 "res: "DLDLMRES" bits "LPX64" rrc: %d type: %s "
2327 "flags: "LPX64" nid: %s remote: "LPX64" expref: %d "
2328 "pid: %u timeout: %lu lvb_type: %d\n",
2329 ldlm_lock_to_ns_name(lock),
2330 lock, lock->l_handle.h_cookie,
2331 atomic_read(&lock->l_refc),
2332 lock->l_readers, lock->l_writers,
2333 ldlm_lockname[lock->l_granted_mode],
2334 ldlm_lockname[lock->l_req_mode],
2336 lock->l_policy_data.l_inodebits.bits,
2337 atomic_read(&resource->lr_refcount),
2338 ldlm_typename[resource->lr_type],
2339 lock->l_flags, nid, lock->l_remote_handle.cookie,
2340 exp ? atomic_read(&exp->exp_refcount) : -99,
2341 lock->l_pid, lock->l_callback_timeout,
2346 libcfs_debug_vmsg2(msgdata, fmt, args,
2347 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2348 "res: "DLDLMRES" rrc: %d type: %s flags: "LPX64" "
2349 "nid: %s remote: "LPX64" expref: %d pid: %u "
2350 "timeout: %lu lvb_type: %d\n",
2351 ldlm_lock_to_ns_name(lock),
2352 lock, lock->l_handle.h_cookie,
2353 atomic_read(&lock->l_refc),
2354 lock->l_readers, lock->l_writers,
2355 ldlm_lockname[lock->l_granted_mode],
2356 ldlm_lockname[lock->l_req_mode],
2358 atomic_read(&resource->lr_refcount),
2359 ldlm_typename[resource->lr_type],
2360 lock->l_flags, nid, lock->l_remote_handle.cookie,
2361 exp ? atomic_read(&exp->exp_refcount) : -99,
2362 lock->l_pid, lock->l_callback_timeout,
2368 EXPORT_SYMBOL(_ldlm_lock_debug);