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):
151 CERROR("Unknown intent %d\n", it);
155 EXPORT_SYMBOL(ldlm_it2str);
157 extern struct kmem_cache *ldlm_lock_slab;
160 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg)
164 EXPORT_SYMBOL(ldlm_register_intent);
167 * REFCOUNTED LOCK OBJECTS
172 * Get a reference on a lock.
174 * Lock refcounts, during creation:
175 * - one special one for allocation, dec'd only once in destroy
176 * - one for being a lock that's in-use
177 * - one for the addref associated with a new lock
179 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock)
181 atomic_inc(&lock->l_refc);
184 EXPORT_SYMBOL(ldlm_lock_get);
187 * Release lock reference.
189 * Also frees the lock if it was last reference.
191 void ldlm_lock_put(struct ldlm_lock *lock)
193 LASSERT(lock->l_resource != LP_POISON);
194 LASSERT(atomic_read(&lock->l_refc) > 0);
195 if (atomic_dec_and_test(&lock->l_refc)) {
196 struct ldlm_resource *res;
199 "final lock_put on destroyed lock, freeing it.");
201 res = lock->l_resource;
202 LASSERT(lock->l_flags & LDLM_FL_DESTROYED);
203 LASSERT(list_empty(&lock->l_res_link));
204 LASSERT(list_empty(&lock->l_pending_chain));
206 lprocfs_counter_decr(ldlm_res_to_ns(res)->ns_stats,
208 lu_ref_del(&res->lr_reference, "lock", lock);
209 ldlm_resource_putref(res);
210 lock->l_resource = NULL;
211 if (lock->l_export) {
212 class_export_lock_put(lock->l_export, lock);
213 lock->l_export = NULL;
216 if (lock->l_lvb_data != NULL)
217 OBD_FREE(lock->l_lvb_data, lock->l_lvb_len);
219 ldlm_interval_free(ldlm_interval_detach(lock));
220 lu_ref_fini(&lock->l_reference);
221 OBD_FREE_RCU(lock, sizeof(*lock), &lock->l_handle);
224 EXPORT_SYMBOL(ldlm_lock_put);
227 * Removes LDLM lock \a lock from LRU. Assumes LRU is already locked.
229 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock)
232 if (!list_empty(&lock->l_lru)) {
233 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
235 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
236 list_del_init(&lock->l_lru);
237 if (lock->l_flags & LDLM_FL_SKIPPED)
238 lock->l_flags &= ~LDLM_FL_SKIPPED;
239 LASSERT(ns->ns_nr_unused > 0);
247 * Removes LDLM lock \a lock from LRU. Obtains the LRU lock first.
249 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock)
251 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
254 if (lock->l_flags & LDLM_FL_NS_SRV) {
255 LASSERT(list_empty(&lock->l_lru));
259 spin_lock(&ns->ns_lock);
260 rc = ldlm_lock_remove_from_lru_nolock(lock);
261 spin_unlock(&ns->ns_lock);
266 * Adds LDLM lock \a lock to namespace LRU. Assumes LRU is already locked.
268 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock)
270 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
272 lock->l_last_used = cfs_time_current();
273 LASSERT(list_empty(&lock->l_lru));
274 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
275 list_add_tail(&lock->l_lru, &ns->ns_unused_list);
276 LASSERT(ns->ns_nr_unused >= 0);
281 * Adds LDLM lock \a lock to namespace LRU. Obtains necessary LRU locks
284 void ldlm_lock_add_to_lru(struct ldlm_lock *lock)
286 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
288 spin_lock(&ns->ns_lock);
289 ldlm_lock_add_to_lru_nolock(lock);
290 spin_unlock(&ns->ns_lock);
294 * Moves LDLM lock \a lock that is already in namespace LRU to the tail of
295 * the LRU. Performs necessary LRU locking
297 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock)
299 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
301 if (lock->l_flags & LDLM_FL_NS_SRV) {
302 LASSERT(list_empty(&lock->l_lru));
306 spin_lock(&ns->ns_lock);
307 if (!list_empty(&lock->l_lru)) {
308 ldlm_lock_remove_from_lru_nolock(lock);
309 ldlm_lock_add_to_lru_nolock(lock);
311 spin_unlock(&ns->ns_lock);
315 * Helper to destroy a locked lock.
317 * Used by ldlm_lock_destroy and ldlm_lock_destroy_nolock
318 * Must be called with l_lock and lr_lock held.
320 * Does not actually free the lock data, but rather marks the lock as
321 * destroyed by setting l_destroyed field in the lock to 1. Destroys a
322 * handle->lock association too, so that the lock can no longer be found
323 * and removes the lock from LRU list. Actual lock freeing occurs when
324 * last lock reference goes away.
326 * Original comment (of some historical value):
327 * This used to have a 'strict' flag, which recovery would use to mark an
328 * in-use lock as needing-to-die. Lest I am ever tempted to put it back, I
329 * shall explain why it's gone: with the new hash table scheme, once you call
330 * ldlm_lock_destroy, you can never drop your final references on this lock.
331 * Because it's not in the hash table anymore. -phil
333 int ldlm_lock_destroy_internal(struct ldlm_lock *lock)
335 if (lock->l_readers || lock->l_writers) {
336 LDLM_ERROR(lock, "lock still has references");
340 if (!list_empty(&lock->l_res_link)) {
341 LDLM_ERROR(lock, "lock still on resource");
345 if (lock->l_flags & LDLM_FL_DESTROYED) {
346 LASSERT(list_empty(&lock->l_lru));
349 lock->l_flags |= LDLM_FL_DESTROYED;
351 if (lock->l_export && lock->l_export->exp_lock_hash) {
352 /* NB: it's safe to call cfs_hash_del() even lock isn't
353 * in exp_lock_hash. */
354 /* In the function below, .hs_keycmp resolves to
355 * ldlm_export_lock_keycmp() */
356 /* coverity[overrun-buffer-val] */
357 cfs_hash_del(lock->l_export->exp_lock_hash,
358 &lock->l_remote_handle, &lock->l_exp_hash);
361 ldlm_lock_remove_from_lru(lock);
362 class_handle_unhash(&lock->l_handle);
365 /* Wake anyone waiting for this lock */
366 /* FIXME: I should probably add yet another flag, instead of using
367 * l_export to only call this on clients */
369 class_export_put(lock->l_export);
370 lock->l_export = NULL;
371 if (lock->l_export && lock->l_completion_ast)
372 lock->l_completion_ast(lock, 0);
378 * Destroys a LDLM lock \a lock. Performs necessary locking first.
380 void ldlm_lock_destroy(struct ldlm_lock *lock)
384 lock_res_and_lock(lock);
385 first = ldlm_lock_destroy_internal(lock);
386 unlock_res_and_lock(lock);
388 /* drop reference from hashtable only for first destroy */
390 lu_ref_del(&lock->l_reference, "hash", lock);
391 LDLM_LOCK_RELEASE(lock);
396 * Destroys a LDLM lock \a lock that is already locked.
398 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock)
402 first = ldlm_lock_destroy_internal(lock);
403 /* drop reference from hashtable only for first destroy */
405 lu_ref_del(&lock->l_reference, "hash", lock);
406 LDLM_LOCK_RELEASE(lock);
410 /* this is called by portals_handle2object with the handle lock taken */
411 static void lock_handle_addref(void *lock)
413 LDLM_LOCK_GET((struct ldlm_lock *)lock);
416 static void lock_handle_free(void *lock, int size)
418 LASSERT(size == sizeof(struct ldlm_lock));
419 OBD_SLAB_FREE(lock, ldlm_lock_slab, size);
422 struct portals_handle_ops lock_handle_ops = {
423 .hop_addref = lock_handle_addref,
424 .hop_free = lock_handle_free,
429 * Allocate and initialize new lock structure.
431 * usage: pass in a resource on which you have done ldlm_resource_get
432 * new lock will take over the refcount.
433 * returns: lock with refcount 2 - one for current caller and one for remote
435 static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
437 struct ldlm_lock *lock;
439 if (resource == NULL)
442 OBD_SLAB_ALLOC_PTR_GFP(lock, ldlm_lock_slab, __GFP_IO);
446 spin_lock_init(&lock->l_lock);
447 lock->l_resource = resource;
448 lu_ref_add(&resource->lr_reference, "lock", lock);
450 atomic_set(&lock->l_refc, 2);
451 INIT_LIST_HEAD(&lock->l_res_link);
452 INIT_LIST_HEAD(&lock->l_lru);
453 INIT_LIST_HEAD(&lock->l_pending_chain);
454 INIT_LIST_HEAD(&lock->l_bl_ast);
455 INIT_LIST_HEAD(&lock->l_cp_ast);
456 INIT_LIST_HEAD(&lock->l_rk_ast);
457 init_waitqueue_head(&lock->l_waitq);
458 lock->l_blocking_lock = NULL;
459 INIT_LIST_HEAD(&lock->l_sl_mode);
460 INIT_LIST_HEAD(&lock->l_sl_policy);
461 INIT_HLIST_NODE(&lock->l_exp_hash);
462 INIT_HLIST_NODE(&lock->l_exp_flock_hash);
464 lprocfs_counter_incr(ldlm_res_to_ns(resource)->ns_stats,
466 INIT_LIST_HEAD(&lock->l_handle.h_link);
467 class_handle_hash(&lock->l_handle, &lock_handle_ops);
469 lu_ref_init(&lock->l_reference);
470 lu_ref_add(&lock->l_reference, "hash", lock);
471 lock->l_callback_timeout = 0;
473 #if LUSTRE_TRACKS_LOCK_EXP_REFS
474 INIT_LIST_HEAD(&lock->l_exp_refs_link);
475 lock->l_exp_refs_nr = 0;
476 lock->l_exp_refs_target = NULL;
478 INIT_LIST_HEAD(&lock->l_exp_list);
484 * Moves LDLM lock \a lock to another resource.
485 * This is used on client when server returns some other lock than requested
486 * (typically as a result of intent operation)
488 int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
489 const struct ldlm_res_id *new_resid)
491 struct ldlm_resource *oldres = lock->l_resource;
492 struct ldlm_resource *newres;
495 LASSERT(ns_is_client(ns));
497 lock_res_and_lock(lock);
498 if (memcmp(new_resid, &lock->l_resource->lr_name,
499 sizeof(lock->l_resource->lr_name)) == 0) {
501 unlock_res_and_lock(lock);
505 LASSERT(new_resid->name[0] != 0);
507 /* This function assumes that the lock isn't on any lists */
508 LASSERT(list_empty(&lock->l_res_link));
510 type = oldres->lr_type;
511 unlock_res_and_lock(lock);
513 newres = ldlm_resource_get(ns, NULL, new_resid, type, 1);
517 lu_ref_add(&newres->lr_reference, "lock", lock);
519 * To flip the lock from the old to the new resource, lock, oldres and
520 * newres have to be locked. Resource spin-locks are nested within
521 * lock->l_lock, and are taken in the memory address order to avoid
524 spin_lock(&lock->l_lock);
525 oldres = lock->l_resource;
526 if (oldres < newres) {
528 lock_res_nested(newres, LRT_NEW);
531 lock_res_nested(oldres, LRT_NEW);
533 LASSERT(memcmp(new_resid, &oldres->lr_name,
534 sizeof(oldres->lr_name)) != 0);
535 lock->l_resource = newres;
537 unlock_res_and_lock(lock);
539 /* ...and the flowers are still standing! */
540 lu_ref_del(&oldres->lr_reference, "lock", lock);
541 ldlm_resource_putref(oldres);
545 EXPORT_SYMBOL(ldlm_lock_change_resource);
547 /** \defgroup ldlm_handles LDLM HANDLES
548 * Ways to get hold of locks without any addresses.
553 * Fills in handle for LDLM lock \a lock into supplied \a lockh
554 * Does not take any references.
556 void ldlm_lock2handle(const struct ldlm_lock *lock, struct lustre_handle *lockh)
558 lockh->cookie = lock->l_handle.h_cookie;
560 EXPORT_SYMBOL(ldlm_lock2handle);
563 * Obtain a lock reference by handle.
565 * if \a flags: atomically get the lock and set the flags.
566 * Return NULL if flag already set
568 struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
571 struct ldlm_lock *lock;
575 lock = class_handle2object(handle->cookie);
579 /* It's unlikely but possible that someone marked the lock as
580 * destroyed after we did handle2object on it */
581 if (flags == 0 && ((lock->l_flags & LDLM_FL_DESTROYED)== 0)) {
582 lu_ref_add(&lock->l_reference, "handle", current);
586 lock_res_and_lock(lock);
588 LASSERT(lock->l_resource != NULL);
590 lu_ref_add_atomic(&lock->l_reference, "handle", current);
591 if (unlikely(lock->l_flags & LDLM_FL_DESTROYED)) {
592 unlock_res_and_lock(lock);
593 CDEBUG(D_INFO, "lock already destroyed: lock %p\n", lock);
598 if (flags && (lock->l_flags & flags)) {
599 unlock_res_and_lock(lock);
605 lock->l_flags |= flags;
607 unlock_res_and_lock(lock);
610 EXPORT_SYMBOL(__ldlm_handle2lock);
611 /** @} ldlm_handles */
614 * Fill in "on the wire" representation for given LDLM lock into supplied
615 * lock descriptor \a desc structure.
617 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc)
619 struct obd_export *exp = lock->l_export ?: lock->l_conn_export;
621 /* INODEBITS_INTEROP: If the other side does not support
622 * inodebits, reply with a plain lock descriptor. */
623 if ((lock->l_resource->lr_type == LDLM_IBITS) &&
624 (exp && !(exp_connect_flags(exp) & OBD_CONNECT_IBITS))) {
625 /* Make sure all the right bits are set in this lock we
626 are going to pass to client */
627 LASSERTF(lock->l_policy_data.l_inodebits.bits ==
628 (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
629 MDS_INODELOCK_LAYOUT),
630 "Inappropriate inode lock bits during "
631 "conversion " LPU64 "\n",
632 lock->l_policy_data.l_inodebits.bits);
634 ldlm_res2desc(lock->l_resource, &desc->l_resource);
635 desc->l_resource.lr_type = LDLM_PLAIN;
637 /* Convert "new" lock mode to something old client can
639 if ((lock->l_req_mode == LCK_CR) ||
640 (lock->l_req_mode == LCK_CW))
641 desc->l_req_mode = LCK_PR;
643 desc->l_req_mode = lock->l_req_mode;
644 if ((lock->l_granted_mode == LCK_CR) ||
645 (lock->l_granted_mode == LCK_CW)) {
646 desc->l_granted_mode = LCK_PR;
648 /* We never grant PW/EX locks to clients */
649 LASSERT((lock->l_granted_mode != LCK_PW) &&
650 (lock->l_granted_mode != LCK_EX));
651 desc->l_granted_mode = lock->l_granted_mode;
654 /* We do not copy policy here, because there is no
655 policy for plain locks */
657 ldlm_res2desc(lock->l_resource, &desc->l_resource);
658 desc->l_req_mode = lock->l_req_mode;
659 desc->l_granted_mode = lock->l_granted_mode;
660 ldlm_convert_policy_to_wire(lock->l_resource->lr_type,
661 &lock->l_policy_data,
662 &desc->l_policy_data);
665 EXPORT_SYMBOL(ldlm_lock2desc);
668 * Add a lock to list of conflicting locks to send AST to.
670 * Only add if we have not sent a blocking AST to the lock yet.
672 void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
673 struct list_head *work_list)
675 if ((lock->l_flags & LDLM_FL_AST_SENT) == 0) {
676 LDLM_DEBUG(lock, "lock incompatible; sending blocking AST.");
677 lock->l_flags |= LDLM_FL_AST_SENT;
678 /* If the enqueuing client said so, tell the AST recipient to
679 * discard dirty data, rather than writing back. */
680 if (new->l_flags & LDLM_FL_AST_DISCARD_DATA)
681 lock->l_flags |= LDLM_FL_DISCARD_DATA;
682 LASSERT(list_empty(&lock->l_bl_ast));
683 list_add(&lock->l_bl_ast, work_list);
685 LASSERT(lock->l_blocking_lock == NULL);
686 lock->l_blocking_lock = LDLM_LOCK_GET(new);
691 * Add a lock to list of just granted locks to send completion AST to.
693 void ldlm_add_cp_work_item(struct ldlm_lock *lock, struct list_head *work_list)
695 if ((lock->l_flags & LDLM_FL_CP_REQD) == 0) {
696 lock->l_flags |= LDLM_FL_CP_REQD;
697 LDLM_DEBUG(lock, "lock granted; sending completion AST.");
698 LASSERT(list_empty(&lock->l_cp_ast));
699 list_add(&lock->l_cp_ast, work_list);
705 * Aggregator function to add AST work items into a list. Determines
706 * what sort of an AST work needs to be done and calls the proper
708 * Must be called with lr_lock held.
710 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
711 struct list_head *work_list)
713 check_res_locked(lock->l_resource);
715 ldlm_add_bl_work_item(lock, new, work_list);
717 ldlm_add_cp_work_item(lock, work_list);
721 * Add specified reader/writer reference to LDLM lock with handle \a lockh.
722 * r/w reference type is determined by \a mode
723 * Calls ldlm_lock_addref_internal.
725 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
727 struct ldlm_lock *lock;
729 lock = ldlm_handle2lock(lockh);
730 LASSERT(lock != NULL);
731 ldlm_lock_addref_internal(lock, mode);
734 EXPORT_SYMBOL(ldlm_lock_addref);
738 * Add specified reader/writer reference to LDLM lock \a lock.
739 * r/w reference type is determined by \a mode
740 * Removes lock from LRU if it is there.
741 * Assumes the LDLM lock is already locked.
743 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
745 ldlm_lock_remove_from_lru(lock);
746 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
748 lu_ref_add_atomic(&lock->l_reference, "reader", lock);
750 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
752 lu_ref_add_atomic(&lock->l_reference, "writer", lock);
755 lu_ref_add_atomic(&lock->l_reference, "user", lock);
756 LDLM_DEBUG(lock, "ldlm_lock_addref(%s)", ldlm_lockname[mode]);
760 * Attempts to add reader/writer reference to a lock with handle \a lockh, and
761 * fails if lock is already LDLM_FL_CBPENDING or destroyed.
763 * \retval 0 success, lock was addref-ed
765 * \retval -EAGAIN lock is being canceled.
767 int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
769 struct ldlm_lock *lock;
773 lock = ldlm_handle2lock(lockh);
775 lock_res_and_lock(lock);
776 if (lock->l_readers != 0 || lock->l_writers != 0 ||
777 !(lock->l_flags & LDLM_FL_CBPENDING)) {
778 ldlm_lock_addref_internal_nolock(lock, mode);
781 unlock_res_and_lock(lock);
786 EXPORT_SYMBOL(ldlm_lock_addref_try);
789 * Add specified reader/writer reference to LDLM lock \a lock.
790 * Locks LDLM lock and calls ldlm_lock_addref_internal_nolock to do the work.
791 * Only called for local locks.
793 void ldlm_lock_addref_internal(struct ldlm_lock *lock, __u32 mode)
795 lock_res_and_lock(lock);
796 ldlm_lock_addref_internal_nolock(lock, mode);
797 unlock_res_and_lock(lock);
801 * Removes reader/writer reference for LDLM lock \a lock.
802 * Assumes LDLM lock is already locked.
803 * only called in ldlm_flock_destroy and for local locks.
804 * Does NOT add lock to LRU if no r/w references left to accommodate flock locks
805 * that cannot be placed in LRU.
807 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
809 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
810 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
811 LASSERT(lock->l_readers > 0);
812 lu_ref_del(&lock->l_reference, "reader", lock);
815 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
816 LASSERT(lock->l_writers > 0);
817 lu_ref_del(&lock->l_reference, "writer", lock);
821 lu_ref_del(&lock->l_reference, "user", lock);
822 LDLM_LOCK_RELEASE(lock); /* matches the LDLM_LOCK_GET() in addref */
826 * Removes reader/writer reference for LDLM lock \a lock.
827 * Locks LDLM lock first.
828 * If the lock is determined to be client lock on a client and r/w refcount
829 * drops to zero and the lock is not blocked, the lock is added to LRU lock
831 * For blocked LDLM locks if r/w count drops to zero, blocking_ast is called.
833 void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
835 struct ldlm_namespace *ns;
837 lock_res_and_lock(lock);
839 ns = ldlm_lock_to_ns(lock);
841 ldlm_lock_decref_internal_nolock(lock, mode);
843 if (lock->l_flags & LDLM_FL_LOCAL &&
844 !lock->l_readers && !lock->l_writers) {
845 /* If this is a local lock on a server namespace and this was
846 * the last reference, cancel the lock. */
847 CDEBUG(D_INFO, "forcing cancel of local lock\n");
848 lock->l_flags |= LDLM_FL_CBPENDING;
851 if (!lock->l_readers && !lock->l_writers &&
852 (lock->l_flags & LDLM_FL_CBPENDING)) {
853 /* If we received a blocked AST and this was the last reference,
854 * run the callback. */
855 if ((lock->l_flags & LDLM_FL_NS_SRV) && lock->l_export)
856 CERROR("FL_CBPENDING set on non-local lock--just a "
859 LDLM_DEBUG(lock, "final decref done on cbpending lock");
861 LDLM_LOCK_GET(lock); /* dropped by bl thread */
862 ldlm_lock_remove_from_lru(lock);
863 unlock_res_and_lock(lock);
865 if (lock->l_flags & LDLM_FL_FAIL_LOC)
866 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
868 if ((lock->l_flags & LDLM_FL_ATOMIC_CB) ||
869 ldlm_bl_to_thread_lock(ns, NULL, lock) != 0)
870 ldlm_handle_bl_callback(ns, NULL, lock);
871 } else if (ns_is_client(ns) &&
872 !lock->l_readers && !lock->l_writers &&
873 !(lock->l_flags & LDLM_FL_NO_LRU) &&
874 !(lock->l_flags & LDLM_FL_BL_AST)) {
876 LDLM_DEBUG(lock, "add lock into lru list");
878 /* If this is a client-side namespace and this was the last
879 * reference, put it on the LRU. */
880 ldlm_lock_add_to_lru(lock);
881 unlock_res_and_lock(lock);
883 if (lock->l_flags & LDLM_FL_FAIL_LOC)
884 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
886 /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
887 * are not supported by the server, otherwise, it is done on
889 if (!exp_connect_cancelset(lock->l_conn_export) &&
890 !ns_connect_lru_resize(ns))
891 ldlm_cancel_lru(ns, 0, LCF_ASYNC, 0);
893 LDLM_DEBUG(lock, "do not add lock into lru list");
894 unlock_res_and_lock(lock);
899 * Decrease reader/writer refcount for LDLM lock with handle \a lockh
901 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
903 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
904 LASSERTF(lock != NULL, "Non-existing lock: "LPX64"\n", lockh->cookie);
905 ldlm_lock_decref_internal(lock, mode);
908 EXPORT_SYMBOL(ldlm_lock_decref);
911 * Decrease reader/writer refcount for LDLM lock with handle
912 * \a lockh and mark it for subsequent cancellation once r/w refcount
913 * drops to zero instead of putting into LRU.
915 * Typical usage is for GROUP locks which we cannot allow to be cached.
917 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
919 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
921 LASSERT(lock != NULL);
923 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
924 lock_res_and_lock(lock);
925 lock->l_flags |= LDLM_FL_CBPENDING;
926 unlock_res_and_lock(lock);
927 ldlm_lock_decref_internal(lock, mode);
930 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
932 struct sl_insert_point {
933 struct list_head *res_link;
934 struct list_head *mode_link;
935 struct list_head *policy_link;
939 * Finds a position to insert the new lock into granted lock list.
941 * Used for locks eligible for skiplist optimization.
944 * queue [input]: the granted list where search acts on;
945 * req [input]: the lock whose position to be located;
946 * prev [output]: positions within 3 lists to insert @req to
950 * - ldlm_grant_lock_with_skiplist
952 static void search_granted_lock(struct list_head *queue,
953 struct ldlm_lock *req,
954 struct sl_insert_point *prev)
956 struct list_head *tmp;
957 struct ldlm_lock *lock, *mode_end, *policy_end;
959 list_for_each(tmp, queue) {
960 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
962 mode_end = list_entry(lock->l_sl_mode.prev,
963 struct ldlm_lock, l_sl_mode);
965 if (lock->l_req_mode != req->l_req_mode) {
966 /* jump to last lock of mode group */
967 tmp = &mode_end->l_res_link;
971 /* suitable mode group is found */
972 if (lock->l_resource->lr_type == LDLM_PLAIN) {
973 /* insert point is last lock of the mode group */
974 prev->res_link = &mode_end->l_res_link;
975 prev->mode_link = &mode_end->l_sl_mode;
976 prev->policy_link = &req->l_sl_policy;
978 } else if (lock->l_resource->lr_type == LDLM_IBITS) {
981 list_entry(lock->l_sl_policy.prev,
985 if (lock->l_policy_data.l_inodebits.bits ==
986 req->l_policy_data.l_inodebits.bits) {
987 /* insert point is last lock of
988 * the policy group */
990 &policy_end->l_res_link;
992 &policy_end->l_sl_mode;
994 &policy_end->l_sl_policy;
998 if (policy_end == mode_end)
999 /* done with mode group */
1002 /* go to next policy group within mode group */
1003 tmp = policy_end->l_res_link.next;
1004 lock = list_entry(tmp, struct ldlm_lock,
1006 } /* loop over policy groups within the mode group */
1008 /* insert point is last lock of the mode group,
1009 * new policy group is started */
1010 prev->res_link = &mode_end->l_res_link;
1011 prev->mode_link = &mode_end->l_sl_mode;
1012 prev->policy_link = &req->l_sl_policy;
1015 LDLM_ERROR(lock,"is not LDLM_PLAIN or LDLM_IBITS lock");
1020 /* insert point is last lock on the queue,
1021 * new mode group and new policy group are started */
1022 prev->res_link = queue->prev;
1023 prev->mode_link = &req->l_sl_mode;
1024 prev->policy_link = &req->l_sl_policy;
1029 * Add a lock into resource granted list after a position described by
1032 static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
1033 struct sl_insert_point *prev)
1035 struct ldlm_resource *res = lock->l_resource;
1037 check_res_locked(res);
1039 ldlm_resource_dump(D_INFO, res);
1040 LDLM_DEBUG(lock, "About to add lock:");
1042 if (lock->l_flags & LDLM_FL_DESTROYED) {
1043 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1047 LASSERT(list_empty(&lock->l_res_link));
1048 LASSERT(list_empty(&lock->l_sl_mode));
1049 LASSERT(list_empty(&lock->l_sl_policy));
1052 * lock->link == prev->link means lock is first starting the group.
1053 * Don't re-add to itself to suppress kernel warnings.
1055 if (&lock->l_res_link != prev->res_link)
1056 list_add(&lock->l_res_link, prev->res_link);
1057 if (&lock->l_sl_mode != prev->mode_link)
1058 list_add(&lock->l_sl_mode, prev->mode_link);
1059 if (&lock->l_sl_policy != prev->policy_link)
1060 list_add(&lock->l_sl_policy, prev->policy_link);
1064 * Add a lock to granted list on a resource maintaining skiplist
1067 static void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
1069 struct sl_insert_point prev;
1071 LASSERT(lock->l_req_mode == lock->l_granted_mode);
1073 search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
1074 ldlm_granted_list_add_lock(lock, &prev);
1078 * Perform lock granting bookkeeping.
1080 * Includes putting the lock into granted list and updating lock mode.
1082 * - ldlm_lock_enqueue
1083 * - ldlm_reprocess_queue
1084 * - ldlm_lock_convert
1086 * must be called with lr_lock held
1088 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
1090 struct ldlm_resource *res = lock->l_resource;
1092 check_res_locked(res);
1094 lock->l_granted_mode = lock->l_req_mode;
1095 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS)
1096 ldlm_grant_lock_with_skiplist(lock);
1097 else if (res->lr_type == LDLM_EXTENT)
1098 ldlm_extent_add_lock(res, lock);
1100 ldlm_resource_add_lock(res, &res->lr_granted, lock);
1102 if (lock->l_granted_mode < res->lr_most_restr)
1103 res->lr_most_restr = lock->l_granted_mode;
1105 if (work_list && lock->l_completion_ast != NULL)
1106 ldlm_add_ast_work_item(lock, NULL, work_list);
1108 ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
1112 * Search for a lock with given properties in a queue.
1114 * \retval a referenced lock or NULL. See the flag descriptions below, in the
1115 * comment above ldlm_lock_match
1117 static struct ldlm_lock *search_queue(struct list_head *queue,
1119 ldlm_policy_data_t *policy,
1120 struct ldlm_lock *old_lock,
1121 __u64 flags, int unref)
1123 struct ldlm_lock *lock;
1124 struct list_head *tmp;
1126 list_for_each(tmp, queue) {
1129 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
1131 if (lock == old_lock)
1134 /* Check if this lock can be matched.
1135 * Used by LU-2919(exclusive open) for open lease lock */
1136 if (ldlm_is_excl(lock))
1139 /* llite sometimes wants to match locks that will be
1140 * canceled when their users drop, but we allow it to match
1141 * if it passes in CBPENDING and the lock still has users.
1142 * this is generally only going to be used by children
1143 * whose parents already hold a lock so forward progress
1144 * can still happen. */
1145 if (lock->l_flags & LDLM_FL_CBPENDING &&
1146 !(flags & LDLM_FL_CBPENDING))
1148 if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
1149 lock->l_readers == 0 && lock->l_writers == 0)
1152 if (!(lock->l_req_mode & *mode))
1154 match = lock->l_req_mode;
1156 if (lock->l_resource->lr_type == LDLM_EXTENT &&
1157 (lock->l_policy_data.l_extent.start >
1158 policy->l_extent.start ||
1159 lock->l_policy_data.l_extent.end < policy->l_extent.end))
1162 if (unlikely(match == LCK_GROUP) &&
1163 lock->l_resource->lr_type == LDLM_EXTENT &&
1164 lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
1167 /* We match if we have existing lock with same or wider set
1169 if (lock->l_resource->lr_type == LDLM_IBITS &&
1170 ((lock->l_policy_data.l_inodebits.bits &
1171 policy->l_inodebits.bits) !=
1172 policy->l_inodebits.bits))
1175 if (!unref && (lock->l_flags & LDLM_FL_GONE_MASK))
1178 if ((flags & LDLM_FL_LOCAL_ONLY) &&
1179 !(lock->l_flags & LDLM_FL_LOCAL))
1182 if (flags & LDLM_FL_TEST_LOCK) {
1183 LDLM_LOCK_GET(lock);
1184 ldlm_lock_touch_in_lru(lock);
1186 ldlm_lock_addref_internal_nolock(lock, match);
1195 void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
1197 if ((lock->l_flags & LDLM_FL_FAIL_NOTIFIED) == 0) {
1198 lock->l_flags |= LDLM_FL_FAIL_NOTIFIED;
1199 wake_up_all(&lock->l_waitq);
1202 EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
1204 void ldlm_lock_fail_match(struct ldlm_lock *lock)
1206 lock_res_and_lock(lock);
1207 ldlm_lock_fail_match_locked(lock);
1208 unlock_res_and_lock(lock);
1210 EXPORT_SYMBOL(ldlm_lock_fail_match);
1213 * Mark lock as "matchable" by OST.
1215 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1217 * Assumes LDLM lock is already locked.
1219 void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
1221 lock->l_flags |= LDLM_FL_LVB_READY;
1222 wake_up_all(&lock->l_waitq);
1224 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
1227 * Mark lock as "matchable" by OST.
1228 * Locks the lock and then \see ldlm_lock_allow_match_locked
1230 void ldlm_lock_allow_match(struct ldlm_lock *lock)
1232 lock_res_and_lock(lock);
1233 ldlm_lock_allow_match_locked(lock);
1234 unlock_res_and_lock(lock);
1236 EXPORT_SYMBOL(ldlm_lock_allow_match);
1239 * Attempt to find a lock with specified properties.
1241 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1244 * Can be called in two ways:
1246 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1247 * for a duplicate of.
1249 * Otherwise, all of the fields must be filled in, to match against.
1251 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1252 * server (ie, connh is NULL)
1253 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1254 * list will be considered
1255 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1256 * to be canceled can still be matched as long as they still have reader
1257 * or writer referneces
1258 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1259 * just tell us if we would have matched.
1261 * \retval 1 if it finds an already-existing lock that is compatible; in this
1262 * case, lockh is filled in with a addref()ed lock
1264 * We also check security context, and if that fails we simply return 0 (to
1265 * keep caller code unchanged), the context failure will be discovered by
1266 * caller sometime later.
1268 ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
1269 const struct ldlm_res_id *res_id, ldlm_type_t type,
1270 ldlm_policy_data_t *policy, ldlm_mode_t mode,
1271 struct lustre_handle *lockh, int unref)
1273 struct ldlm_resource *res;
1274 struct ldlm_lock *lock, *old_lock = NULL;
1278 old_lock = ldlm_handle2lock(lockh);
1281 ns = ldlm_lock_to_ns(old_lock);
1282 res_id = &old_lock->l_resource->lr_name;
1283 type = old_lock->l_resource->lr_type;
1284 mode = old_lock->l_req_mode;
1287 res = ldlm_resource_get(ns, NULL, res_id, type, 0);
1289 LASSERT(old_lock == NULL);
1293 LDLM_RESOURCE_ADDREF(res);
1296 lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
1300 if (flags & LDLM_FL_BLOCK_GRANTED)
1302 lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
1306 lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
1313 LDLM_RESOURCE_DELREF(res);
1314 ldlm_resource_putref(res);
1317 ldlm_lock2handle(lock, lockh);
1318 if ((flags & LDLM_FL_LVB_READY) &&
1319 (!(lock->l_flags & LDLM_FL_LVB_READY))) {
1320 __u64 wait_flags = LDLM_FL_LVB_READY |
1321 LDLM_FL_DESTROYED | LDLM_FL_FAIL_NOTIFIED;
1322 struct l_wait_info lwi;
1323 if (lock->l_completion_ast) {
1324 int err = lock->l_completion_ast(lock,
1325 LDLM_FL_WAIT_NOREPROC,
1328 if (flags & LDLM_FL_TEST_LOCK)
1329 LDLM_LOCK_RELEASE(lock);
1331 ldlm_lock_decref_internal(lock,
1338 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
1339 NULL, LWI_ON_SIGNAL_NOOP, NULL);
1341 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1342 l_wait_event(lock->l_waitq,
1343 lock->l_flags & wait_flags,
1345 if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
1346 if (flags & LDLM_FL_TEST_LOCK)
1347 LDLM_LOCK_RELEASE(lock);
1349 ldlm_lock_decref_internal(lock, mode);
1356 LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
1357 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1358 res_id->name[2] : policy->l_extent.start,
1359 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1360 res_id->name[3] : policy->l_extent.end);
1362 /* check user's security context */
1363 if (lock->l_conn_export &&
1364 sptlrpc_import_check_ctx(
1365 class_exp2cliimp(lock->l_conn_export))) {
1366 if (!(flags & LDLM_FL_TEST_LOCK))
1367 ldlm_lock_decref_internal(lock, mode);
1371 if (flags & LDLM_FL_TEST_LOCK)
1372 LDLM_LOCK_RELEASE(lock);
1374 } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
1375 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
1376 LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
1377 type, mode, res_id->name[0], res_id->name[1],
1378 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1379 res_id->name[2] :policy->l_extent.start,
1380 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1381 res_id->name[3] : policy->l_extent.end);
1384 LDLM_LOCK_PUT(old_lock);
1386 return rc ? mode : 0;
1388 EXPORT_SYMBOL(ldlm_lock_match);
1390 ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
1393 struct ldlm_lock *lock;
1394 ldlm_mode_t mode = 0;
1396 lock = ldlm_handle2lock(lockh);
1398 lock_res_and_lock(lock);
1399 if (lock->l_flags & LDLM_FL_GONE_MASK)
1402 if (lock->l_flags & LDLM_FL_CBPENDING &&
1403 lock->l_readers == 0 && lock->l_writers == 0)
1407 *bits = lock->l_policy_data.l_inodebits.bits;
1408 mode = lock->l_granted_mode;
1409 ldlm_lock_addref_internal_nolock(lock, mode);
1414 unlock_res_and_lock(lock);
1415 LDLM_LOCK_PUT(lock);
1419 EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
1421 /** The caller must guarantee that the buffer is large enough. */
1422 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
1423 enum req_location loc, void *data, int size)
1427 LASSERT(data != NULL);
1430 switch (lock->l_lvb_type) {
1432 if (size == sizeof(struct ost_lvb)) {
1433 if (loc == RCL_CLIENT)
1434 lvb = req_capsule_client_swab_get(pill,
1436 lustre_swab_ost_lvb);
1438 lvb = req_capsule_server_swab_get(pill,
1440 lustre_swab_ost_lvb);
1441 if (unlikely(lvb == NULL)) {
1442 LDLM_ERROR(lock, "no LVB");
1446 memcpy(data, lvb, size);
1447 } else if (size == sizeof(struct ost_lvb_v1)) {
1448 struct ost_lvb *olvb = data;
1450 if (loc == RCL_CLIENT)
1451 lvb = req_capsule_client_swab_get(pill,
1453 lustre_swab_ost_lvb_v1);
1455 lvb = req_capsule_server_sized_swab_get(pill,
1457 lustre_swab_ost_lvb_v1);
1458 if (unlikely(lvb == NULL)) {
1459 LDLM_ERROR(lock, "no LVB");
1463 memcpy(data, lvb, size);
1464 olvb->lvb_mtime_ns = 0;
1465 olvb->lvb_atime_ns = 0;
1466 olvb->lvb_ctime_ns = 0;
1468 LDLM_ERROR(lock, "Replied unexpected ost LVB size %d",
1474 if (size == sizeof(struct lquota_lvb)) {
1475 if (loc == RCL_CLIENT)
1476 lvb = req_capsule_client_swab_get(pill,
1478 lustre_swab_lquota_lvb);
1480 lvb = req_capsule_server_swab_get(pill,
1482 lustre_swab_lquota_lvb);
1483 if (unlikely(lvb == NULL)) {
1484 LDLM_ERROR(lock, "no LVB");
1488 memcpy(data, lvb, size);
1490 LDLM_ERROR(lock, "Replied unexpected lquota LVB size %d",
1499 if (loc == RCL_CLIENT)
1500 lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
1502 lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
1503 if (unlikely(lvb == NULL)) {
1504 LDLM_ERROR(lock, "no LVB");
1508 memcpy(data, lvb, size);
1511 LDLM_ERROR(lock, "Unknown LVB type: %d\n", lock->l_lvb_type);
1520 * Create and fill in new LDLM lock with specified properties.
1521 * Returns a referenced lock
1523 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
1524 const struct ldlm_res_id *res_id,
1527 const struct ldlm_callback_suite *cbs,
1528 void *data, __u32 lvb_len,
1529 enum lvb_type lvb_type)
1531 struct ldlm_lock *lock;
1532 struct ldlm_resource *res;
1534 res = ldlm_resource_get(ns, NULL, res_id, type, 1);
1538 lock = ldlm_lock_new(res);
1543 lock->l_req_mode = mode;
1544 lock->l_ast_data = data;
1545 lock->l_pid = current_pid();
1546 if (ns_is_server(ns))
1547 lock->l_flags |= LDLM_FL_NS_SRV;
1549 lock->l_blocking_ast = cbs->lcs_blocking;
1550 lock->l_completion_ast = cbs->lcs_completion;
1551 lock->l_glimpse_ast = cbs->lcs_glimpse;
1554 lock->l_tree_node = NULL;
1555 /* if this is the extent lock, allocate the interval tree node */
1556 if (type == LDLM_EXTENT) {
1557 if (ldlm_interval_alloc(lock) == NULL)
1562 lock->l_lvb_len = lvb_len;
1563 OBD_ALLOC(lock->l_lvb_data, lvb_len);
1564 if (lock->l_lvb_data == NULL)
1568 lock->l_lvb_type = lvb_type;
1569 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
1575 ldlm_lock_destroy(lock);
1576 LDLM_LOCK_RELEASE(lock);
1581 * Enqueue (request) a lock.
1583 * Does not block. As a result of enqueue the lock would be put
1584 * into granted or waiting list.
1586 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1587 * set, skip all the enqueueing and delegate lock processing to intent policy
1590 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
1591 struct ldlm_lock **lockp,
1592 void *cookie, __u64 *flags)
1594 struct ldlm_lock *lock = *lockp;
1595 struct ldlm_resource *res = lock->l_resource;
1596 int local = ns_is_client(ldlm_res_to_ns(res));
1597 ldlm_error_t rc = ELDLM_OK;
1598 struct ldlm_interval *node = NULL;
1600 lock->l_last_activity = cfs_time_current_sec();
1601 /* policies are not executed on the client or during replay */
1602 if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
1603 && !local && ns->ns_policy) {
1604 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
1606 if (rc == ELDLM_LOCK_REPLACED) {
1607 /* The lock that was returned has already been granted,
1608 * and placed into lockp. If it's not the same as the
1609 * one we passed in, then destroy the old one and our
1610 * work here is done. */
1611 if (lock != *lockp) {
1612 ldlm_lock_destroy(lock);
1613 LDLM_LOCK_RELEASE(lock);
1615 *flags |= LDLM_FL_LOCK_CHANGED;
1617 } else if (rc != ELDLM_OK ||
1618 (rc == ELDLM_OK && (*flags & LDLM_FL_INTENT_ONLY))) {
1619 ldlm_lock_destroy(lock);
1624 /* For a replaying lock, it might be already in granted list. So
1625 * unlinking the lock will cause the interval node to be freed, we
1626 * have to allocate the interval node early otherwise we can't regrant
1627 * this lock in the future. - jay */
1628 if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
1629 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
1631 lock_res_and_lock(lock);
1632 if (local && lock->l_req_mode == lock->l_granted_mode) {
1633 /* The server returned a blocked lock, but it was granted
1634 * before we got a chance to actually enqueue it. We don't
1635 * need to do anything else. */
1636 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
1637 LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
1638 GOTO(out, ELDLM_OK);
1641 ldlm_resource_unlink_lock(lock);
1642 if (res->lr_type == LDLM_EXTENT && lock->l_tree_node == NULL) {
1644 ldlm_lock_destroy_nolock(lock);
1645 GOTO(out, rc = -ENOMEM);
1648 INIT_LIST_HEAD(&node->li_group);
1649 ldlm_interval_attach(node, lock);
1653 /* Some flags from the enqueue want to make it into the AST, via the
1654 * lock's l_flags. */
1655 lock->l_flags |= *flags & LDLM_FL_AST_DISCARD_DATA;
1657 /* This distinction between local lock trees is very important; a client
1658 * namespace only has information about locks taken by that client, and
1659 * thus doesn't have enough information to decide for itself if it can
1660 * be granted (below). In this case, we do exactly what the server
1661 * tells us to do, as dictated by the 'flags'.
1663 * We do exactly the same thing during recovery, when the server is
1664 * more or less trusting the clients not to lie.
1666 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1667 * granted/converting queues. */
1669 if (*flags & LDLM_FL_BLOCK_CONV)
1670 ldlm_resource_add_lock(res, &res->lr_converting, lock);
1671 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
1672 ldlm_resource_add_lock(res, &res->lr_waiting, lock);
1674 ldlm_grant_lock(lock, NULL);
1675 GOTO(out, ELDLM_OK);
1677 CERROR("This is client-side-only module, cannot handle "
1678 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1683 unlock_res_and_lock(lock);
1685 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
1691 * Process a call to blocking AST callback for a lock in ast_work list
1694 ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1696 struct ldlm_cb_set_arg *arg = opaq;
1697 struct ldlm_lock_desc d;
1699 struct ldlm_lock *lock;
1701 if (list_empty(arg->list))
1704 lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
1706 /* nobody should touch l_bl_ast */
1707 lock_res_and_lock(lock);
1708 list_del_init(&lock->l_bl_ast);
1710 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1711 LASSERT(lock->l_bl_ast_run == 0);
1712 LASSERT(lock->l_blocking_lock);
1713 lock->l_bl_ast_run++;
1714 unlock_res_and_lock(lock);
1716 ldlm_lock2desc(lock->l_blocking_lock, &d);
1718 rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
1719 LDLM_LOCK_RELEASE(lock->l_blocking_lock);
1720 lock->l_blocking_lock = NULL;
1721 LDLM_LOCK_RELEASE(lock);
1727 * Process a call to completion AST callback for a lock in ast_work list
1730 ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1732 struct ldlm_cb_set_arg *arg = opaq;
1734 struct ldlm_lock *lock;
1735 ldlm_completion_callback completion_callback;
1737 if (list_empty(arg->list))
1740 lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
1742 /* It's possible to receive a completion AST before we've set
1743 * the l_completion_ast pointer: either because the AST arrived
1744 * before the reply, or simply because there's a small race
1745 * window between receiving the reply and finishing the local
1746 * enqueue. (bug 842)
1748 * This can't happen with the blocking_ast, however, because we
1749 * will never call the local blocking_ast until we drop our
1750 * reader/writer reference, which we won't do until we get the
1751 * reply and finish enqueueing. */
1753 /* nobody should touch l_cp_ast */
1754 lock_res_and_lock(lock);
1755 list_del_init(&lock->l_cp_ast);
1756 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1757 /* save l_completion_ast since it can be changed by
1758 * mds_intent_policy(), see bug 14225 */
1759 completion_callback = lock->l_completion_ast;
1760 lock->l_flags &= ~LDLM_FL_CP_REQD;
1761 unlock_res_and_lock(lock);
1763 if (completion_callback != NULL)
1764 rc = completion_callback(lock, 0, (void *)arg);
1765 LDLM_LOCK_RELEASE(lock);
1771 * Process a call to revocation AST callback for a lock in ast_work list
1774 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1776 struct ldlm_cb_set_arg *arg = opaq;
1777 struct ldlm_lock_desc desc;
1779 struct ldlm_lock *lock;
1781 if (list_empty(arg->list))
1784 lock = list_entry(arg->list->next, struct ldlm_lock, l_rk_ast);
1785 list_del_init(&lock->l_rk_ast);
1787 /* the desc just pretend to exclusive */
1788 ldlm_lock2desc(lock, &desc);
1789 desc.l_req_mode = LCK_EX;
1790 desc.l_granted_mode = 0;
1792 rc = lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
1793 LDLM_LOCK_RELEASE(lock);
1799 * Process a call to glimpse AST callback for a lock in ast_work list
1801 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1803 struct ldlm_cb_set_arg *arg = opaq;
1804 struct ldlm_glimpse_work *gl_work;
1805 struct ldlm_lock *lock;
1808 if (list_empty(arg->list))
1811 gl_work = list_entry(arg->list->next, struct ldlm_glimpse_work,
1813 list_del_init(&gl_work->gl_list);
1815 lock = gl_work->gl_lock;
1817 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1818 arg->gl_desc = gl_work->gl_desc;
1820 /* invoke the actual glimpse callback */
1821 if (lock->l_glimpse_ast(lock, (void*)arg) == 0)
1824 LDLM_LOCK_RELEASE(lock);
1826 if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
1827 OBD_FREE_PTR(gl_work);
1833 * Process list of locks in need of ASTs being sent.
1835 * Used on server to send multiple ASTs together instead of sending one by
1838 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
1839 ldlm_desc_ast_t ast_type)
1841 struct ldlm_cb_set_arg *arg;
1842 set_producer_func work_ast_lock;
1845 if (list_empty(rpc_list))
1852 atomic_set(&arg->restart, 0);
1853 arg->list = rpc_list;
1856 case LDLM_WORK_BL_AST:
1857 arg->type = LDLM_BL_CALLBACK;
1858 work_ast_lock = ldlm_work_bl_ast_lock;
1860 case LDLM_WORK_CP_AST:
1861 arg->type = LDLM_CP_CALLBACK;
1862 work_ast_lock = ldlm_work_cp_ast_lock;
1864 case LDLM_WORK_REVOKE_AST:
1865 arg->type = LDLM_BL_CALLBACK;
1866 work_ast_lock = ldlm_work_revoke_ast_lock;
1868 case LDLM_WORK_GL_AST:
1869 arg->type = LDLM_GL_CALLBACK;
1870 work_ast_lock = ldlm_work_gl_ast_lock;
1876 /* We create a ptlrpc request set with flow control extension.
1877 * This request set will use the work_ast_lock function to produce new
1878 * requests and will send a new request each time one completes in order
1879 * to keep the number of requests in flight to ns_max_parallel_ast */
1880 arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
1881 work_ast_lock, arg);
1882 if (arg->set == NULL)
1883 GOTO(out, rc = -ENOMEM);
1885 ptlrpc_set_wait(arg->set);
1886 ptlrpc_set_destroy(arg->set);
1888 rc = atomic_read(&arg->restart) ? -ERESTART : 0;
1895 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
1897 ldlm_reprocess_all(res);
1898 return LDLM_ITER_CONTINUE;
1901 static int ldlm_reprocess_res(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1902 struct hlist_node *hnode, void *arg)
1904 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1907 rc = reprocess_one_queue(res, arg);
1909 return rc == LDLM_ITER_STOP;
1913 * Iterate through all resources on a namespace attempting to grant waiting
1916 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
1919 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1920 ldlm_reprocess_res, NULL);
1923 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1926 * Try to grant all waiting locks on a resource.
1928 * Calls ldlm_reprocess_queue on converting and waiting queues.
1930 * Typically called after some resource locks are cancelled to see
1931 * if anything could be granted as a result of the cancellation.
1933 void ldlm_reprocess_all(struct ldlm_resource *res)
1935 LIST_HEAD(rpc_list);
1937 if (!ns_is_client(ldlm_res_to_ns(res))) {
1938 CERROR("This is client-side-only module, cannot handle "
1939 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1945 * Helper function to call blocking AST for LDLM lock \a lock in a
1946 * "cancelling" mode.
1948 void ldlm_cancel_callback(struct ldlm_lock *lock)
1950 check_res_locked(lock->l_resource);
1951 if (!(lock->l_flags & LDLM_FL_CANCEL)) {
1952 lock->l_flags |= LDLM_FL_CANCEL;
1953 if (lock->l_blocking_ast) {
1954 unlock_res_and_lock(lock);
1955 lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
1957 lock_res_and_lock(lock);
1959 LDLM_DEBUG(lock, "no blocking ast");
1962 lock->l_flags |= LDLM_FL_BL_DONE;
1966 * Remove skiplist-enabled LDLM lock \a req from granted list
1968 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req)
1970 if (req->l_resource->lr_type != LDLM_PLAIN &&
1971 req->l_resource->lr_type != LDLM_IBITS)
1974 list_del_init(&req->l_sl_policy);
1975 list_del_init(&req->l_sl_mode);
1979 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
1981 void ldlm_lock_cancel(struct ldlm_lock *lock)
1983 struct ldlm_resource *res;
1984 struct ldlm_namespace *ns;
1986 lock_res_and_lock(lock);
1988 res = lock->l_resource;
1989 ns = ldlm_res_to_ns(res);
1991 /* Please do not, no matter how tempting, remove this LBUG without
1992 * talking to me first. -phik */
1993 if (lock->l_readers || lock->l_writers) {
1994 LDLM_ERROR(lock, "lock still has references");
1998 if (lock->l_flags & LDLM_FL_WAITED)
1999 ldlm_del_waiting_lock(lock);
2001 /* Releases cancel callback. */
2002 ldlm_cancel_callback(lock);
2004 /* Yes, second time, just in case it was added again while we were
2005 * running with no res lock in ldlm_cancel_callback */
2006 if (lock->l_flags & LDLM_FL_WAITED)
2007 ldlm_del_waiting_lock(lock);
2009 ldlm_resource_unlink_lock(lock);
2010 ldlm_lock_destroy_nolock(lock);
2012 if (lock->l_granted_mode == lock->l_req_mode)
2013 ldlm_pool_del(&ns->ns_pool, lock);
2015 /* Make sure we will not be called again for same lock what is possible
2016 * if not to zero out lock->l_granted_mode */
2017 lock->l_granted_mode = LCK_MINMODE;
2018 unlock_res_and_lock(lock);
2020 EXPORT_SYMBOL(ldlm_lock_cancel);
2023 * Set opaque data into the lock that only makes sense to upper layer.
2025 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
2027 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2031 if (lock->l_ast_data == NULL)
2032 lock->l_ast_data = data;
2033 if (lock->l_ast_data == data)
2035 LDLM_LOCK_PUT(lock);
2039 EXPORT_SYMBOL(ldlm_lock_set_data);
2041 struct export_cl_data {
2042 struct obd_export *ecl_exp;
2047 * Iterator function for ldlm_cancel_locks_for_export.
2048 * Cancels passed locks.
2050 int ldlm_cancel_locks_for_export_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
2051 struct hlist_node *hnode, void *data)
2054 struct export_cl_data *ecl = (struct export_cl_data *)data;
2055 struct obd_export *exp = ecl->ecl_exp;
2056 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2057 struct ldlm_resource *res;
2059 res = ldlm_resource_getref(lock->l_resource);
2060 LDLM_LOCK_GET(lock);
2062 LDLM_DEBUG(lock, "export %p", exp);
2063 ldlm_res_lvbo_update(res, NULL, 1);
2064 ldlm_lock_cancel(lock);
2065 ldlm_reprocess_all(res);
2066 ldlm_resource_putref(res);
2067 LDLM_LOCK_RELEASE(lock);
2070 if ((ecl->ecl_loop & -ecl->ecl_loop) == ecl->ecl_loop) {
2072 "Cancel lock %p for export %p (loop %d), still have "
2073 "%d locks left on hash table.\n",
2074 lock, exp, ecl->ecl_loop,
2075 atomic_read(&hs->hs_count));
2082 * Cancel all locks for given export.
2084 * Typically called on client disconnection/eviction
2086 void ldlm_cancel_locks_for_export(struct obd_export *exp)
2088 struct export_cl_data ecl = {
2093 cfs_hash_for_each_empty(exp->exp_lock_hash,
2094 ldlm_cancel_locks_for_export_cb, &ecl);
2098 * Downgrade an exclusive lock.
2100 * A fast variant of ldlm_lock_convert for conversion of exclusive
2101 * locks. The conversion is always successful.
2102 * Used by Commit on Sharing (COS) code.
2104 * \param lock A lock to convert
2105 * \param new_mode new lock mode
2107 void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
2109 LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
2110 LASSERT(new_mode == LCK_COS);
2112 lock_res_and_lock(lock);
2113 ldlm_resource_unlink_lock(lock);
2115 * Remove the lock from pool as it will be added again in
2116 * ldlm_grant_lock() called below.
2118 ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
2120 lock->l_req_mode = new_mode;
2121 ldlm_grant_lock(lock, NULL);
2122 unlock_res_and_lock(lock);
2123 ldlm_reprocess_all(lock->l_resource);
2125 EXPORT_SYMBOL(ldlm_lock_downgrade);
2128 * Attempt to convert already granted lock to a different mode.
2130 * While lock conversion is not currently used, future client-side
2131 * optimizations could take advantage of it to avoid discarding cached
2134 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
2137 LIST_HEAD(rpc_list);
2138 struct ldlm_resource *res;
2139 struct ldlm_namespace *ns;
2141 struct ldlm_interval *node;
2143 /* Just return if mode is unchanged. */
2144 if (new_mode == lock->l_granted_mode) {
2145 *flags |= LDLM_FL_BLOCK_GRANTED;
2146 return lock->l_resource;
2149 /* I can't check the type of lock here because the bitlock of lock
2150 * is not held here, so do the allocation blindly. -jay */
2151 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
2153 /* Actually, this causes EDEADLOCK to be returned */
2156 LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
2157 "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
2159 lock_res_and_lock(lock);
2161 res = lock->l_resource;
2162 ns = ldlm_res_to_ns(res);
2164 lock->l_req_mode = new_mode;
2165 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
2166 ldlm_resource_unlink_lock(lock);
2168 ldlm_resource_unlink_lock(lock);
2169 if (res->lr_type == LDLM_EXTENT) {
2170 /* FIXME: ugly code, I have to attach the lock to a
2171 * interval node again since perhaps it will be granted
2173 INIT_LIST_HEAD(&node->li_group);
2174 ldlm_interval_attach(node, lock);
2180 * Remove old lock from the pool before adding the lock with new
2181 * mode below in ->policy()
2183 ldlm_pool_del(&ns->ns_pool, lock);
2185 /* If this is a local resource, put it on the appropriate list. */
2186 if (ns_is_client(ldlm_res_to_ns(res))) {
2187 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
2188 ldlm_resource_add_lock(res, &res->lr_converting, lock);
2190 /* This should never happen, because of the way the
2191 * server handles conversions. */
2192 LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
2196 ldlm_grant_lock(lock, &rpc_list);
2198 /* FIXME: completion handling not with lr_lock held ! */
2199 if (lock->l_completion_ast)
2200 lock->l_completion_ast(lock, 0, NULL);
2203 CERROR("This is client-side-only module, cannot handle "
2204 "LDLM_NAMESPACE_SERVER resource type lock.\n");
2207 unlock_res_and_lock(lock);
2210 ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
2212 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
2215 EXPORT_SYMBOL(ldlm_lock_convert);
2218 * Print lock with lock handle \a lockh description into debug log.
2220 * Used when printing all locks on a resource for debug purposes.
2222 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
2224 struct ldlm_lock *lock;
2226 if (!((libcfs_debug | D_ERROR) & level))
2229 lock = ldlm_handle2lock(lockh);
2233 LDLM_DEBUG_LIMIT(level, lock, "###");
2235 LDLM_LOCK_PUT(lock);
2237 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2240 * Print lock information with custom message into debug log.
2243 void _ldlm_lock_debug(struct ldlm_lock *lock,
2244 struct libcfs_debug_msg_data *msgdata,
2245 const char *fmt, ...)
2248 struct obd_export *exp = lock->l_export;
2249 struct ldlm_resource *resource = lock->l_resource;
2250 char *nid = "local";
2252 va_start(args, fmt);
2254 if (exp && exp->exp_connection) {
2255 nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
2256 } else if (exp && exp->exp_obd != NULL) {
2257 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
2258 nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
2261 if (resource == NULL) {
2262 libcfs_debug_vmsg2(msgdata, fmt, args,
2263 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2264 "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" nid: %s "
2265 "remote: "LPX64" expref: %d pid: %u timeout: %lu "
2268 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2269 lock->l_readers, lock->l_writers,
2270 ldlm_lockname[lock->l_granted_mode],
2271 ldlm_lockname[lock->l_req_mode],
2272 lock->l_flags, nid, lock->l_remote_handle.cookie,
2273 exp ? atomic_read(&exp->exp_refcount) : -99,
2274 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2279 switch (resource->lr_type) {
2281 libcfs_debug_vmsg2(msgdata, fmt, args,
2282 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2283 "res: "DLDLMRES" rrc: %d type: %s ["LPU64"->"LPU64"] "
2284 "(req "LPU64"->"LPU64") flags: "LPX64" nid: %s remote: "
2285 LPX64" expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2286 ldlm_lock_to_ns_name(lock), lock,
2287 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2288 lock->l_readers, lock->l_writers,
2289 ldlm_lockname[lock->l_granted_mode],
2290 ldlm_lockname[lock->l_req_mode],
2292 atomic_read(&resource->lr_refcount),
2293 ldlm_typename[resource->lr_type],
2294 lock->l_policy_data.l_extent.start,
2295 lock->l_policy_data.l_extent.end,
2296 lock->l_req_extent.start, lock->l_req_extent.end,
2297 lock->l_flags, nid, lock->l_remote_handle.cookie,
2298 exp ? atomic_read(&exp->exp_refcount) : -99,
2299 lock->l_pid, lock->l_callback_timeout,
2304 libcfs_debug_vmsg2(msgdata, fmt, args,
2305 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2306 "res: "DLDLMRES" rrc: %d type: %s pid: %d "
2307 "["LPU64"->"LPU64"] flags: "LPX64" nid: %s "
2308 "remote: "LPX64" expref: %d pid: %u timeout: %lu\n",
2309 ldlm_lock_to_ns_name(lock), lock,
2310 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2311 lock->l_readers, lock->l_writers,
2312 ldlm_lockname[lock->l_granted_mode],
2313 ldlm_lockname[lock->l_req_mode],
2315 atomic_read(&resource->lr_refcount),
2316 ldlm_typename[resource->lr_type],
2317 lock->l_policy_data.l_flock.pid,
2318 lock->l_policy_data.l_flock.start,
2319 lock->l_policy_data.l_flock.end,
2320 lock->l_flags, nid, lock->l_remote_handle.cookie,
2321 exp ? atomic_read(&exp->exp_refcount) : -99,
2322 lock->l_pid, lock->l_callback_timeout);
2326 libcfs_debug_vmsg2(msgdata, fmt, args,
2327 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2328 "res: "DLDLMRES" bits "LPX64" rrc: %d type: %s "
2329 "flags: "LPX64" nid: %s remote: "LPX64" expref: %d "
2330 "pid: %u timeout: %lu lvb_type: %d\n",
2331 ldlm_lock_to_ns_name(lock),
2332 lock, lock->l_handle.h_cookie,
2333 atomic_read(&lock->l_refc),
2334 lock->l_readers, lock->l_writers,
2335 ldlm_lockname[lock->l_granted_mode],
2336 ldlm_lockname[lock->l_req_mode],
2338 lock->l_policy_data.l_inodebits.bits,
2339 atomic_read(&resource->lr_refcount),
2340 ldlm_typename[resource->lr_type],
2341 lock->l_flags, nid, lock->l_remote_handle.cookie,
2342 exp ? atomic_read(&exp->exp_refcount) : -99,
2343 lock->l_pid, lock->l_callback_timeout,
2348 libcfs_debug_vmsg2(msgdata, fmt, args,
2349 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2350 "res: "DLDLMRES" rrc: %d type: %s flags: "LPX64" "
2351 "nid: %s remote: "LPX64" expref: %d pid: %u "
2352 "timeout: %lu lvb_type: %d\n",
2353 ldlm_lock_to_ns_name(lock),
2354 lock, lock->l_handle.h_cookie,
2355 atomic_read(&lock->l_refc),
2356 lock->l_readers, lock->l_writers,
2357 ldlm_lockname[lock->l_granted_mode],
2358 ldlm_lockname[lock->l_req_mode],
2360 atomic_read(&resource->lr_refcount),
2361 ldlm_typename[resource->lr_type],
2362 lock->l_flags, nid, lock->l_remote_handle.cookie,
2363 exp ? atomic_read(&exp->exp_refcount) : -99,
2364 lock->l_pid, lock->l_callback_timeout,
2370 EXPORT_SYMBOL(_ldlm_lock_debug);