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[] = {
62 EXPORT_SYMBOL(ldlm_lockname);
64 char *ldlm_typename[] = {
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)
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_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);
226 EXPORT_SYMBOL(ldlm_lock_put);
229 * Removes LDLM lock \a lock from LRU. Assumes LRU is already locked.
231 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock)
234 if (!list_empty(&lock->l_lru)) {
235 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
237 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
238 list_del_init(&lock->l_lru);
239 if (lock->l_flags & LDLM_FL_SKIPPED)
240 lock->l_flags &= ~LDLM_FL_SKIPPED;
241 LASSERT(ns->ns_nr_unused > 0);
249 * Removes LDLM lock \a lock from LRU. Obtains the LRU lock first.
251 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock)
253 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
257 if (lock->l_ns_srv) {
258 LASSERT(list_empty(&lock->l_lru));
262 spin_lock(&ns->ns_lock);
263 rc = ldlm_lock_remove_from_lru_nolock(lock);
264 spin_unlock(&ns->ns_lock);
270 * Adds LDLM lock \a lock to namespace LRU. Assumes LRU is already locked.
272 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock)
274 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
276 lock->l_last_used = cfs_time_current();
277 LASSERT(list_empty(&lock->l_lru));
278 LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
279 list_add_tail(&lock->l_lru, &ns->ns_unused_list);
280 LASSERT(ns->ns_nr_unused >= 0);
285 * Adds LDLM lock \a lock to namespace LRU. Obtains necessary LRU locks
288 void ldlm_lock_add_to_lru(struct ldlm_lock *lock)
290 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
293 spin_lock(&ns->ns_lock);
294 ldlm_lock_add_to_lru_nolock(lock);
295 spin_unlock(&ns->ns_lock);
300 * Moves LDLM lock \a lock that is already in namespace LRU to the tail of
301 * the LRU. Performs necessary LRU locking
303 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock)
305 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
308 if (lock->l_ns_srv) {
309 LASSERT(list_empty(&lock->l_lru));
314 spin_lock(&ns->ns_lock);
315 if (!list_empty(&lock->l_lru)) {
316 ldlm_lock_remove_from_lru_nolock(lock);
317 ldlm_lock_add_to_lru_nolock(lock);
319 spin_unlock(&ns->ns_lock);
324 * Helper to destroy a locked lock.
326 * Used by ldlm_lock_destroy and ldlm_lock_destroy_nolock
327 * Must be called with l_lock and lr_lock held.
329 * Does not actually free the lock data, but rather marks the lock as
330 * destroyed by setting l_destroyed field in the lock to 1. Destroys a
331 * handle->lock association too, so that the lock can no longer be found
332 * and removes the lock from LRU list. Actual lock freeing occurs when
333 * last lock reference goes away.
335 * Original comment (of some historical value):
336 * This used to have a 'strict' flag, which recovery would use to mark an
337 * in-use lock as needing-to-die. Lest I am ever tempted to put it back, I
338 * shall explain why it's gone: with the new hash table scheme, once you call
339 * ldlm_lock_destroy, you can never drop your final references on this lock.
340 * Because it's not in the hash table anymore. -phil
342 int ldlm_lock_destroy_internal(struct ldlm_lock *lock)
346 if (lock->l_readers || lock->l_writers) {
347 LDLM_ERROR(lock, "lock still has references");
351 if (!list_empty(&lock->l_res_link)) {
352 LDLM_ERROR(lock, "lock still on resource");
356 if (lock->l_destroyed) {
357 LASSERT(list_empty(&lock->l_lru));
361 lock->l_destroyed = 1;
363 if (lock->l_export && lock->l_export->exp_lock_hash) {
364 /* NB: it's safe to call cfs_hash_del() even lock isn't
365 * in exp_lock_hash. */
366 /* In the function below, .hs_keycmp resolves to
367 * ldlm_export_lock_keycmp() */
368 /* coverity[overrun-buffer-val] */
369 cfs_hash_del(lock->l_export->exp_lock_hash,
370 &lock->l_remote_handle, &lock->l_exp_hash);
373 ldlm_lock_remove_from_lru(lock);
374 class_handle_unhash(&lock->l_handle);
377 /* Wake anyone waiting for this lock */
378 /* FIXME: I should probably add yet another flag, instead of using
379 * l_export to only call this on clients */
381 class_export_put(lock->l_export);
382 lock->l_export = NULL;
383 if (lock->l_export && lock->l_completion_ast)
384 lock->l_completion_ast(lock, 0);
391 * Destroys a LDLM lock \a lock. Performs necessary locking first.
393 void ldlm_lock_destroy(struct ldlm_lock *lock)
397 lock_res_and_lock(lock);
398 first = ldlm_lock_destroy_internal(lock);
399 unlock_res_and_lock(lock);
401 /* drop reference from hashtable only for first destroy */
403 lu_ref_del(&lock->l_reference, "hash", lock);
404 LDLM_LOCK_RELEASE(lock);
410 * Destroys a LDLM lock \a lock that is already locked.
412 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock)
416 first = ldlm_lock_destroy_internal(lock);
417 /* drop reference from hashtable only for first destroy */
419 lu_ref_del(&lock->l_reference, "hash", lock);
420 LDLM_LOCK_RELEASE(lock);
425 /* this is called by portals_handle2object with the handle lock taken */
426 static void lock_handle_addref(void *lock)
428 LDLM_LOCK_GET((struct ldlm_lock *)lock);
431 static void lock_handle_free(void *lock, int size)
433 LASSERT(size == sizeof(struct ldlm_lock));
434 OBD_SLAB_FREE(lock, ldlm_lock_slab, size);
437 struct portals_handle_ops lock_handle_ops = {
438 .hop_addref = lock_handle_addref,
439 .hop_free = lock_handle_free,
444 * Allocate and initialize new lock structure.
446 * usage: pass in a resource on which you have done ldlm_resource_get
447 * new lock will take over the refcount.
448 * returns: lock with refcount 2 - one for current caller and one for remote
450 static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
452 struct ldlm_lock *lock;
455 if (resource == NULL)
458 OBD_SLAB_ALLOC_PTR_GFP(lock, ldlm_lock_slab, __GFP_IO);
462 spin_lock_init(&lock->l_lock);
463 lock->l_resource = resource;
464 lu_ref_add(&resource->lr_reference, "lock", lock);
466 atomic_set(&lock->l_refc, 2);
467 INIT_LIST_HEAD(&lock->l_res_link);
468 INIT_LIST_HEAD(&lock->l_lru);
469 INIT_LIST_HEAD(&lock->l_pending_chain);
470 INIT_LIST_HEAD(&lock->l_bl_ast);
471 INIT_LIST_HEAD(&lock->l_cp_ast);
472 INIT_LIST_HEAD(&lock->l_rk_ast);
473 init_waitqueue_head(&lock->l_waitq);
474 lock->l_blocking_lock = NULL;
475 INIT_LIST_HEAD(&lock->l_sl_mode);
476 INIT_LIST_HEAD(&lock->l_sl_policy);
477 INIT_HLIST_NODE(&lock->l_exp_hash);
478 INIT_HLIST_NODE(&lock->l_exp_flock_hash);
480 lprocfs_counter_incr(ldlm_res_to_ns(resource)->ns_stats,
482 INIT_LIST_HEAD(&lock->l_handle.h_link);
483 class_handle_hash(&lock->l_handle, &lock_handle_ops);
485 lu_ref_init(&lock->l_reference);
486 lu_ref_add(&lock->l_reference, "hash", lock);
487 lock->l_callback_timeout = 0;
489 #if LUSTRE_TRACKS_LOCK_EXP_REFS
490 INIT_LIST_HEAD(&lock->l_exp_refs_link);
491 lock->l_exp_refs_nr = 0;
492 lock->l_exp_refs_target = NULL;
494 INIT_LIST_HEAD(&lock->l_exp_list);
500 * Moves LDLM lock \a lock to another resource.
501 * This is used on client when server returns some other lock than requested
502 * (typically as a result of intent operation)
504 int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
505 const struct ldlm_res_id *new_resid)
507 struct ldlm_resource *oldres = lock->l_resource;
508 struct ldlm_resource *newres;
512 LASSERT(ns_is_client(ns));
514 lock_res_and_lock(lock);
515 if (memcmp(new_resid, &lock->l_resource->lr_name,
516 sizeof(lock->l_resource->lr_name)) == 0) {
518 unlock_res_and_lock(lock);
522 LASSERT(new_resid->name[0] != 0);
524 /* This function assumes that the lock isn't on any lists */
525 LASSERT(list_empty(&lock->l_res_link));
527 type = oldres->lr_type;
528 unlock_res_and_lock(lock);
530 newres = ldlm_resource_get(ns, NULL, new_resid, type, 1);
534 lu_ref_add(&newres->lr_reference, "lock", lock);
536 * To flip the lock from the old to the new resource, lock, oldres and
537 * newres have to be locked. Resource spin-locks are nested within
538 * lock->l_lock, and are taken in the memory address order to avoid
541 spin_lock(&lock->l_lock);
542 oldres = lock->l_resource;
543 if (oldres < newres) {
545 lock_res_nested(newres, LRT_NEW);
548 lock_res_nested(oldres, LRT_NEW);
550 LASSERT(memcmp(new_resid, &oldres->lr_name,
551 sizeof oldres->lr_name) != 0);
552 lock->l_resource = newres;
554 unlock_res_and_lock(lock);
556 /* ...and the flowers are still standing! */
557 lu_ref_del(&oldres->lr_reference, "lock", lock);
558 ldlm_resource_putref(oldres);
562 EXPORT_SYMBOL(ldlm_lock_change_resource);
564 /** \defgroup ldlm_handles LDLM HANDLES
565 * Ways to get hold of locks without any addresses.
570 * Fills in handle for LDLM lock \a lock into supplied \a lockh
571 * Does not take any references.
573 void ldlm_lock2handle(const struct ldlm_lock *lock, struct lustre_handle *lockh)
575 lockh->cookie = lock->l_handle.h_cookie;
577 EXPORT_SYMBOL(ldlm_lock2handle);
580 * Obtain a lock reference by handle.
582 * if \a flags: atomically get the lock and set the flags.
583 * Return NULL if flag already set
585 struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
588 struct ldlm_lock *lock;
593 lock = class_handle2object(handle->cookie);
597 /* It's unlikely but possible that someone marked the lock as
598 * destroyed after we did handle2object on it */
599 if (flags == 0 && !lock->l_destroyed) {
600 lu_ref_add(&lock->l_reference, "handle", current);
604 lock_res_and_lock(lock);
606 LASSERT(lock->l_resource != NULL);
608 lu_ref_add_atomic(&lock->l_reference, "handle", current);
609 if (unlikely(lock->l_destroyed)) {
610 unlock_res_and_lock(lock);
611 CDEBUG(D_INFO, "lock already destroyed: lock %p\n", lock);
616 if (flags && (lock->l_flags & flags)) {
617 unlock_res_and_lock(lock);
623 lock->l_flags |= flags;
625 unlock_res_and_lock(lock);
628 EXPORT_SYMBOL(__ldlm_handle2lock);
629 /** @} ldlm_handles */
632 * Fill in "on the wire" representation for given LDLM lock into supplied
633 * lock descriptor \a desc structure.
635 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc)
637 struct obd_export *exp = lock->l_export ?: lock->l_conn_export;
639 /* INODEBITS_INTEROP: If the other side does not support
640 * inodebits, reply with a plain lock descriptor. */
641 if ((lock->l_resource->lr_type == LDLM_IBITS) &&
642 (exp && !(exp_connect_flags(exp) & OBD_CONNECT_IBITS))) {
643 /* Make sure all the right bits are set in this lock we
644 are going to pass to client */
645 LASSERTF(lock->l_policy_data.l_inodebits.bits ==
646 (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
647 MDS_INODELOCK_LAYOUT),
648 "Inappropriate inode lock bits during "
649 "conversion " LPU64 "\n",
650 lock->l_policy_data.l_inodebits.bits);
652 ldlm_res2desc(lock->l_resource, &desc->l_resource);
653 desc->l_resource.lr_type = LDLM_PLAIN;
655 /* Convert "new" lock mode to something old client can
657 if ((lock->l_req_mode == LCK_CR) ||
658 (lock->l_req_mode == LCK_CW))
659 desc->l_req_mode = LCK_PR;
661 desc->l_req_mode = lock->l_req_mode;
662 if ((lock->l_granted_mode == LCK_CR) ||
663 (lock->l_granted_mode == LCK_CW)) {
664 desc->l_granted_mode = LCK_PR;
666 /* We never grant PW/EX locks to clients */
667 LASSERT((lock->l_granted_mode != LCK_PW) &&
668 (lock->l_granted_mode != LCK_EX));
669 desc->l_granted_mode = lock->l_granted_mode;
672 /* We do not copy policy here, because there is no
673 policy for plain locks */
675 ldlm_res2desc(lock->l_resource, &desc->l_resource);
676 desc->l_req_mode = lock->l_req_mode;
677 desc->l_granted_mode = lock->l_granted_mode;
678 ldlm_convert_policy_to_wire(lock->l_resource->lr_type,
679 &lock->l_policy_data,
680 &desc->l_policy_data);
683 EXPORT_SYMBOL(ldlm_lock2desc);
686 * Add a lock to list of conflicting locks to send AST to.
688 * Only add if we have not sent a blocking AST to the lock yet.
690 void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
691 struct list_head *work_list)
693 if ((lock->l_flags & LDLM_FL_AST_SENT) == 0) {
694 LDLM_DEBUG(lock, "lock incompatible; sending blocking AST.");
695 lock->l_flags |= LDLM_FL_AST_SENT;
696 /* If the enqueuing client said so, tell the AST recipient to
697 * discard dirty data, rather than writing back. */
698 if (new->l_flags & LDLM_AST_DISCARD_DATA)
699 lock->l_flags |= LDLM_FL_DISCARD_DATA;
700 LASSERT(list_empty(&lock->l_bl_ast));
701 list_add(&lock->l_bl_ast, work_list);
703 LASSERT(lock->l_blocking_lock == NULL);
704 lock->l_blocking_lock = LDLM_LOCK_GET(new);
709 * Add a lock to list of just granted locks to send completion AST to.
711 void ldlm_add_cp_work_item(struct ldlm_lock *lock, struct list_head *work_list)
713 if ((lock->l_flags & LDLM_FL_CP_REQD) == 0) {
714 lock->l_flags |= LDLM_FL_CP_REQD;
715 LDLM_DEBUG(lock, "lock granted; sending completion AST.");
716 LASSERT(list_empty(&lock->l_cp_ast));
717 list_add(&lock->l_cp_ast, work_list);
723 * Aggregator function to add AST work items into a list. Determines
724 * what sort of an AST work needs to be done and calls the proper
726 * Must be called with lr_lock held.
728 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
729 struct list_head *work_list)
732 check_res_locked(lock->l_resource);
734 ldlm_add_bl_work_item(lock, new, work_list);
736 ldlm_add_cp_work_item(lock, work_list);
741 * Add specified reader/writer reference to LDLM lock with handle \a lockh.
742 * r/w reference type is determined by \a mode
743 * Calls ldlm_lock_addref_internal.
745 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
747 struct ldlm_lock *lock;
749 lock = ldlm_handle2lock(lockh);
750 LASSERT(lock != NULL);
751 ldlm_lock_addref_internal(lock, mode);
754 EXPORT_SYMBOL(ldlm_lock_addref);
758 * Add specified reader/writer reference to LDLM lock \a lock.
759 * r/w reference type is determined by \a mode
760 * Removes lock from LRU if it is there.
761 * Assumes the LDLM lock is already locked.
763 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
765 ldlm_lock_remove_from_lru(lock);
766 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
768 lu_ref_add_atomic(&lock->l_reference, "reader", lock);
770 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
772 lu_ref_add_atomic(&lock->l_reference, "writer", lock);
775 lu_ref_add_atomic(&lock->l_reference, "user", lock);
776 LDLM_DEBUG(lock, "ldlm_lock_addref(%s)", ldlm_lockname[mode]);
780 * Attempts to add reader/writer reference to a lock with handle \a lockh, and
781 * fails if lock is already LDLM_FL_CBPENDING or destroyed.
783 * \retval 0 success, lock was addref-ed
785 * \retval -EAGAIN lock is being canceled.
787 int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
789 struct ldlm_lock *lock;
793 lock = ldlm_handle2lock(lockh);
795 lock_res_and_lock(lock);
796 if (lock->l_readers != 0 || lock->l_writers != 0 ||
797 !(lock->l_flags & LDLM_FL_CBPENDING)) {
798 ldlm_lock_addref_internal_nolock(lock, mode);
801 unlock_res_and_lock(lock);
806 EXPORT_SYMBOL(ldlm_lock_addref_try);
809 * Add specified reader/writer reference to LDLM lock \a lock.
810 * Locks LDLM lock and calls ldlm_lock_addref_internal_nolock to do the work.
811 * Only called for local locks.
813 void ldlm_lock_addref_internal(struct ldlm_lock *lock, __u32 mode)
815 lock_res_and_lock(lock);
816 ldlm_lock_addref_internal_nolock(lock, mode);
817 unlock_res_and_lock(lock);
821 * Removes reader/writer reference for LDLM lock \a lock.
822 * Assumes LDLM lock is already locked.
823 * only called in ldlm_flock_destroy and for local locks.
824 * Does NOT add lock to LRU if no r/w references left to accomodate flock locks
825 * that cannot be placed in LRU.
827 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
829 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
830 if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
831 LASSERT(lock->l_readers > 0);
832 lu_ref_del(&lock->l_reference, "reader", lock);
835 if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
836 LASSERT(lock->l_writers > 0);
837 lu_ref_del(&lock->l_reference, "writer", lock);
841 lu_ref_del(&lock->l_reference, "user", lock);
842 LDLM_LOCK_RELEASE(lock); /* matches the LDLM_LOCK_GET() in addref */
846 * Removes reader/writer reference for LDLM lock \a lock.
847 * Locks LDLM lock first.
848 * If the lock is determined to be client lock on a client and r/w refcount
849 * drops to zero and the lock is not blocked, the lock is added to LRU lock
851 * For blocked LDLM locks if r/w count drops to zero, blocking_ast is called.
853 void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
855 struct ldlm_namespace *ns;
858 lock_res_and_lock(lock);
860 ns = ldlm_lock_to_ns(lock);
862 ldlm_lock_decref_internal_nolock(lock, mode);
864 /* release lvb data for layout lock */
865 if (ns_is_client(ns) && !lock->l_readers && !lock->l_writers &&
866 ldlm_has_layout(lock) && lock->l_flags & LDLM_FL_LVB_READY) {
867 /* this is the last user of a layout lock and stripe has
868 * been set up, lvb is no longer used.
869 * This may be a large amount of memory, so we should free it
871 if (lock->l_lvb_data != NULL) {
872 OBD_FREE_LARGE(lock->l_lvb_data, lock->l_lvb_len);
873 lock->l_lvb_data = NULL;
878 if (lock->l_flags & LDLM_FL_LOCAL &&
879 !lock->l_readers && !lock->l_writers) {
880 /* If this is a local lock on a server namespace and this was
881 * the last reference, cancel the lock. */
882 CDEBUG(D_INFO, "forcing cancel of local lock\n");
883 lock->l_flags |= LDLM_FL_CBPENDING;
886 if (!lock->l_readers && !lock->l_writers &&
887 (lock->l_flags & LDLM_FL_CBPENDING)) {
888 /* If we received a blocked AST and this was the last reference,
889 * run the callback. */
890 if (lock->l_ns_srv && lock->l_export)
891 CERROR("FL_CBPENDING set on non-local lock--just a "
894 LDLM_DEBUG(lock, "final decref done on cbpending lock");
896 LDLM_LOCK_GET(lock); /* dropped by bl thread */
897 ldlm_lock_remove_from_lru(lock);
898 unlock_res_and_lock(lock);
900 if (lock->l_flags & LDLM_FL_FAIL_LOC)
901 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
903 if ((lock->l_flags & LDLM_FL_ATOMIC_CB) ||
904 ldlm_bl_to_thread_lock(ns, NULL, lock) != 0)
905 ldlm_handle_bl_callback(ns, NULL, lock);
906 } else if (ns_is_client(ns) &&
907 !lock->l_readers && !lock->l_writers &&
908 !(lock->l_flags & LDLM_FL_NO_LRU) &&
909 !(lock->l_flags & LDLM_FL_BL_AST)) {
911 LDLM_DEBUG(lock, "add lock into lru list");
913 /* If this is a client-side namespace and this was the last
914 * reference, put it on the LRU. */
915 ldlm_lock_add_to_lru(lock);
916 unlock_res_and_lock(lock);
918 if (lock->l_flags & LDLM_FL_FAIL_LOC)
919 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
921 /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
922 * are not supported by the server, otherwise, it is done on
924 if (!exp_connect_cancelset(lock->l_conn_export) &&
925 !ns_connect_lru_resize(ns))
926 ldlm_cancel_lru(ns, 0, LCF_ASYNC, 0);
928 LDLM_DEBUG(lock, "do not add lock into lru list");
929 unlock_res_and_lock(lock);
936 * Decrease reader/writer refcount for LDLM lock with handle \a lockh
938 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
940 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
941 LASSERTF(lock != NULL, "Non-existing lock: "LPX64"\n", lockh->cookie);
942 ldlm_lock_decref_internal(lock, mode);
945 EXPORT_SYMBOL(ldlm_lock_decref);
948 * Decrease reader/writer refcount for LDLM lock with handle
949 * \a lockh and mark it for subsequent cancellation once r/w refcount
950 * drops to zero instead of putting into LRU.
952 * Typical usage is for GROUP locks which we cannot allow to be cached.
954 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
956 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
959 LASSERT(lock != NULL);
961 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
962 lock_res_and_lock(lock);
963 lock->l_flags |= LDLM_FL_CBPENDING;
964 unlock_res_and_lock(lock);
965 ldlm_lock_decref_internal(lock, mode);
968 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
970 struct sl_insert_point {
971 struct list_head *res_link;
972 struct list_head *mode_link;
973 struct list_head *policy_link;
977 * Finds a position to insert the new lock into granted lock list.
979 * Used for locks eligible for skiplist optimization.
982 * queue [input]: the granted list where search acts on;
983 * req [input]: the lock whose position to be located;
984 * prev [output]: positions within 3 lists to insert @req to
988 * - ldlm_grant_lock_with_skiplist
990 static void search_granted_lock(struct list_head *queue,
991 struct ldlm_lock *req,
992 struct sl_insert_point *prev)
994 struct list_head *tmp;
995 struct ldlm_lock *lock, *mode_end, *policy_end;
998 list_for_each(tmp, queue) {
999 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
1001 mode_end = list_entry(lock->l_sl_mode.prev,
1002 struct ldlm_lock, l_sl_mode);
1004 if (lock->l_req_mode != req->l_req_mode) {
1005 /* jump to last lock of mode group */
1006 tmp = &mode_end->l_res_link;
1010 /* suitable mode group is found */
1011 if (lock->l_resource->lr_type == LDLM_PLAIN) {
1012 /* insert point is last lock of the mode group */
1013 prev->res_link = &mode_end->l_res_link;
1014 prev->mode_link = &mode_end->l_sl_mode;
1015 prev->policy_link = &req->l_sl_policy;
1018 } else if (lock->l_resource->lr_type == LDLM_IBITS) {
1021 list_entry(lock->l_sl_policy.prev,
1025 if (lock->l_policy_data.l_inodebits.bits ==
1026 req->l_policy_data.l_inodebits.bits) {
1027 /* insert point is last lock of
1028 * the policy group */
1030 &policy_end->l_res_link;
1032 &policy_end->l_sl_mode;
1034 &policy_end->l_sl_policy;
1039 if (policy_end == mode_end)
1040 /* done with mode group */
1043 /* go to next policy group within mode group */
1044 tmp = policy_end->l_res_link.next;
1045 lock = list_entry(tmp, struct ldlm_lock,
1047 } /* loop over policy groups within the mode group */
1049 /* insert point is last lock of the mode group,
1050 * new policy group is started */
1051 prev->res_link = &mode_end->l_res_link;
1052 prev->mode_link = &mode_end->l_sl_mode;
1053 prev->policy_link = &req->l_sl_policy;
1057 LDLM_ERROR(lock,"is not LDLM_PLAIN or LDLM_IBITS lock");
1062 /* insert point is last lock on the queue,
1063 * new mode group and new policy group are started */
1064 prev->res_link = queue->prev;
1065 prev->mode_link = &req->l_sl_mode;
1066 prev->policy_link = &req->l_sl_policy;
1072 * Add a lock into resource granted list after a position described by
1075 static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
1076 struct sl_insert_point *prev)
1078 struct ldlm_resource *res = lock->l_resource;
1081 check_res_locked(res);
1083 ldlm_resource_dump(D_INFO, res);
1084 LDLM_DEBUG(lock, "About to add lock:");
1086 if (lock->l_destroyed) {
1087 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1091 LASSERT(list_empty(&lock->l_res_link));
1092 LASSERT(list_empty(&lock->l_sl_mode));
1093 LASSERT(list_empty(&lock->l_sl_policy));
1096 * lock->link == prev->link means lock is first starting the group.
1097 * Don't re-add to itself to suppress kernel warnings.
1099 if (&lock->l_res_link != prev->res_link)
1100 list_add(&lock->l_res_link, prev->res_link);
1101 if (&lock->l_sl_mode != prev->mode_link)
1102 list_add(&lock->l_sl_mode, prev->mode_link);
1103 if (&lock->l_sl_policy != prev->policy_link)
1104 list_add(&lock->l_sl_policy, prev->policy_link);
1110 * Add a lock to granted list on a resource maintaining skiplist
1113 static void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
1115 struct sl_insert_point prev;
1118 LASSERT(lock->l_req_mode == lock->l_granted_mode);
1120 search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
1121 ldlm_granted_list_add_lock(lock, &prev);
1126 * Perform lock granting bookkeeping.
1128 * Includes putting the lock into granted list and updating lock mode.
1130 * - ldlm_lock_enqueue
1131 * - ldlm_reprocess_queue
1132 * - ldlm_lock_convert
1134 * must be called with lr_lock held
1136 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
1138 struct ldlm_resource *res = lock->l_resource;
1141 check_res_locked(res);
1143 lock->l_granted_mode = lock->l_req_mode;
1144 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS)
1145 ldlm_grant_lock_with_skiplist(lock);
1146 else if (res->lr_type == LDLM_EXTENT)
1147 ldlm_extent_add_lock(res, lock);
1149 ldlm_resource_add_lock(res, &res->lr_granted, lock);
1151 if (lock->l_granted_mode < res->lr_most_restr)
1152 res->lr_most_restr = lock->l_granted_mode;
1154 if (work_list && lock->l_completion_ast != NULL)
1155 ldlm_add_ast_work_item(lock, NULL, work_list);
1157 ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
1162 * Search for a lock with given properties in a queue.
1164 * \retval a referenced lock or NULL. See the flag descriptions below, in the
1165 * comment above ldlm_lock_match
1167 static struct ldlm_lock *search_queue(struct list_head *queue,
1169 ldlm_policy_data_t *policy,
1170 struct ldlm_lock *old_lock,
1171 __u64 flags, int unref)
1173 struct ldlm_lock *lock;
1174 struct list_head *tmp;
1176 list_for_each(tmp, queue) {
1179 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
1181 if (lock == old_lock)
1184 /* llite sometimes wants to match locks that will be
1185 * canceled when their users drop, but we allow it to match
1186 * if it passes in CBPENDING and the lock still has users.
1187 * this is generally only going to be used by children
1188 * whose parents already hold a lock so forward progress
1189 * can still happen. */
1190 if (lock->l_flags & LDLM_FL_CBPENDING &&
1191 !(flags & LDLM_FL_CBPENDING))
1193 if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
1194 lock->l_readers == 0 && lock->l_writers == 0)
1197 if (!(lock->l_req_mode & *mode))
1199 match = lock->l_req_mode;
1201 if (lock->l_resource->lr_type == LDLM_EXTENT &&
1202 (lock->l_policy_data.l_extent.start >
1203 policy->l_extent.start ||
1204 lock->l_policy_data.l_extent.end < policy->l_extent.end))
1207 if (unlikely(match == LCK_GROUP) &&
1208 lock->l_resource->lr_type == LDLM_EXTENT &&
1209 lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
1212 /* We match if we have existing lock with same or wider set
1214 if (lock->l_resource->lr_type == LDLM_IBITS &&
1215 ((lock->l_policy_data.l_inodebits.bits &
1216 policy->l_inodebits.bits) !=
1217 policy->l_inodebits.bits))
1221 (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED ||
1225 if ((flags & LDLM_FL_LOCAL_ONLY) &&
1226 !(lock->l_flags & LDLM_FL_LOCAL))
1229 if (flags & LDLM_FL_TEST_LOCK) {
1230 LDLM_LOCK_GET(lock);
1231 ldlm_lock_touch_in_lru(lock);
1233 ldlm_lock_addref_internal_nolock(lock, match);
1242 void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
1244 if (!lock->l_failed) {
1246 wake_up_all(&lock->l_waitq);
1249 EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
1251 void ldlm_lock_fail_match(struct ldlm_lock *lock)
1253 lock_res_and_lock(lock);
1254 ldlm_lock_fail_match_locked(lock);
1255 unlock_res_and_lock(lock);
1257 EXPORT_SYMBOL(ldlm_lock_fail_match);
1260 * Mark lock as "matchable" by OST.
1262 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1264 * Assumes LDLM lock is already locked.
1266 void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
1268 lock->l_flags |= LDLM_FL_LVB_READY;
1269 wake_up_all(&lock->l_waitq);
1271 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
1274 * Mark lock as "matchable" by OST.
1275 * Locks the lock and then \see ldlm_lock_allow_match_locked
1277 void ldlm_lock_allow_match(struct ldlm_lock *lock)
1279 lock_res_and_lock(lock);
1280 ldlm_lock_allow_match_locked(lock);
1281 unlock_res_and_lock(lock);
1283 EXPORT_SYMBOL(ldlm_lock_allow_match);
1286 * Attempt to find a lock with specified properties.
1288 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1291 * Can be called in two ways:
1293 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1294 * for a duplicate of.
1296 * Otherwise, all of the fields must be filled in, to match against.
1298 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1299 * server (ie, connh is NULL)
1300 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1301 * list will be considered
1302 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1303 * to be canceled can still be matched as long as they still have reader
1304 * or writer refernces
1305 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1306 * just tell us if we would have matched.
1308 * \retval 1 if it finds an already-existing lock that is compatible; in this
1309 * case, lockh is filled in with a addref()ed lock
1311 * We also check security context, and if that fails we simply return 0 (to
1312 * keep caller code unchanged), the context failure will be discovered by
1313 * caller sometime later.
1315 ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
1316 const struct ldlm_res_id *res_id, ldlm_type_t type,
1317 ldlm_policy_data_t *policy, ldlm_mode_t mode,
1318 struct lustre_handle *lockh, int unref)
1320 struct ldlm_resource *res;
1321 struct ldlm_lock *lock, *old_lock = NULL;
1326 old_lock = ldlm_handle2lock(lockh);
1329 ns = ldlm_lock_to_ns(old_lock);
1330 res_id = &old_lock->l_resource->lr_name;
1331 type = old_lock->l_resource->lr_type;
1332 mode = old_lock->l_req_mode;
1335 res = ldlm_resource_get(ns, NULL, res_id, type, 0);
1337 LASSERT(old_lock == NULL);
1341 LDLM_RESOURCE_ADDREF(res);
1344 lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
1348 if (flags & LDLM_FL_BLOCK_GRANTED)
1350 lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
1354 lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
1362 LDLM_RESOURCE_DELREF(res);
1363 ldlm_resource_putref(res);
1366 ldlm_lock2handle(lock, lockh);
1367 if ((flags & LDLM_FL_LVB_READY) &&
1368 (!(lock->l_flags & LDLM_FL_LVB_READY))) {
1369 struct l_wait_info lwi;
1370 if (lock->l_completion_ast) {
1371 int err = lock->l_completion_ast(lock,
1372 LDLM_FL_WAIT_NOREPROC,
1375 if (flags & LDLM_FL_TEST_LOCK)
1376 LDLM_LOCK_RELEASE(lock);
1378 ldlm_lock_decref_internal(lock,
1385 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
1386 NULL, LWI_ON_SIGNAL_NOOP, NULL);
1388 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1389 l_wait_event(lock->l_waitq,
1390 lock->l_flags & LDLM_FL_LVB_READY ||
1391 lock->l_destroyed || lock->l_failed,
1393 if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
1394 if (flags & LDLM_FL_TEST_LOCK)
1395 LDLM_LOCK_RELEASE(lock);
1397 ldlm_lock_decref_internal(lock, mode);
1404 LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
1405 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1406 res_id->name[2] : policy->l_extent.start,
1407 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1408 res_id->name[3] : policy->l_extent.end);
1410 /* check user's security context */
1411 if (lock->l_conn_export &&
1412 sptlrpc_import_check_ctx(
1413 class_exp2cliimp(lock->l_conn_export))) {
1414 if (!(flags & LDLM_FL_TEST_LOCK))
1415 ldlm_lock_decref_internal(lock, mode);
1419 if (flags & LDLM_FL_TEST_LOCK)
1420 LDLM_LOCK_RELEASE(lock);
1422 } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
1423 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
1424 LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
1425 type, mode, res_id->name[0], res_id->name[1],
1426 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1427 res_id->name[2] :policy->l_extent.start,
1428 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1429 res_id->name[3] : policy->l_extent.end);
1432 LDLM_LOCK_PUT(old_lock);
1434 return rc ? mode : 0;
1436 EXPORT_SYMBOL(ldlm_lock_match);
1438 ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
1441 struct ldlm_lock *lock;
1442 ldlm_mode_t mode = 0;
1445 lock = ldlm_handle2lock(lockh);
1447 lock_res_and_lock(lock);
1448 if (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED ||
1452 if (lock->l_flags & LDLM_FL_CBPENDING &&
1453 lock->l_readers == 0 && lock->l_writers == 0)
1457 *bits = lock->l_policy_data.l_inodebits.bits;
1458 mode = lock->l_granted_mode;
1459 ldlm_lock_addref_internal_nolock(lock, mode);
1466 unlock_res_and_lock(lock);
1467 LDLM_LOCK_PUT(lock);
1471 EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
1473 /** The caller must guarantee that the buffer is large enough. */
1474 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
1475 enum req_location loc, void *data, int size)
1480 LASSERT(data != NULL);
1483 switch (lock->l_lvb_type) {
1485 if (size == sizeof(struct ost_lvb)) {
1486 if (loc == RCL_CLIENT)
1487 lvb = req_capsule_client_swab_get(pill,
1489 lustre_swab_ost_lvb);
1491 lvb = req_capsule_server_swab_get(pill,
1493 lustre_swab_ost_lvb);
1494 if (unlikely(lvb == NULL)) {
1495 LDLM_ERROR(lock, "no LVB");
1499 memcpy(data, lvb, size);
1500 } else if (size == sizeof(struct ost_lvb_v1)) {
1501 struct ost_lvb *olvb = data;
1503 if (loc == RCL_CLIENT)
1504 lvb = req_capsule_client_swab_get(pill,
1506 lustre_swab_ost_lvb_v1);
1508 lvb = req_capsule_server_sized_swab_get(pill,
1510 lustre_swab_ost_lvb_v1);
1511 if (unlikely(lvb == NULL)) {
1512 LDLM_ERROR(lock, "no LVB");
1516 memcpy(data, lvb, size);
1517 olvb->lvb_mtime_ns = 0;
1518 olvb->lvb_atime_ns = 0;
1519 olvb->lvb_ctime_ns = 0;
1521 LDLM_ERROR(lock, "Replied unexpected ost LVB size %d",
1527 if (size == sizeof(struct lquota_lvb)) {
1528 if (loc == RCL_CLIENT)
1529 lvb = req_capsule_client_swab_get(pill,
1531 lustre_swab_lquota_lvb);
1533 lvb = req_capsule_server_swab_get(pill,
1535 lustre_swab_lquota_lvb);
1536 if (unlikely(lvb == NULL)) {
1537 LDLM_ERROR(lock, "no LVB");
1541 memcpy(data, lvb, size);
1543 LDLM_ERROR(lock, "Replied unexpected lquota LVB size %d",
1552 if (loc == RCL_CLIENT)
1553 lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
1555 lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
1556 if (unlikely(lvb == NULL)) {
1557 LDLM_ERROR(lock, "no LVB");
1561 memcpy(data, lvb, size);
1564 LDLM_ERROR(lock, "Unknown LVB type: %d\n", lock->l_lvb_type);
1565 libcfs_debug_dumpstack(NULL);
1573 * Create and fill in new LDLM lock with specified properties.
1574 * Returns a referenced lock
1576 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
1577 const struct ldlm_res_id *res_id,
1580 const struct ldlm_callback_suite *cbs,
1581 void *data, __u32 lvb_len,
1582 enum lvb_type lvb_type)
1584 struct ldlm_lock *lock;
1585 struct ldlm_resource *res;
1588 res = ldlm_resource_get(ns, NULL, res_id, type, 1);
1592 lock = ldlm_lock_new(res);
1597 lock->l_req_mode = mode;
1598 lock->l_ast_data = data;
1599 lock->l_pid = current_pid();
1600 lock->l_ns_srv = !!ns_is_server(ns);
1602 lock->l_blocking_ast = cbs->lcs_blocking;
1603 lock->l_completion_ast = cbs->lcs_completion;
1604 lock->l_glimpse_ast = cbs->lcs_glimpse;
1605 lock->l_weigh_ast = cbs->lcs_weigh;
1608 lock->l_tree_node = NULL;
1609 /* if this is the extent lock, allocate the interval tree node */
1610 if (type == LDLM_EXTENT) {
1611 if (ldlm_interval_alloc(lock) == NULL)
1616 lock->l_lvb_len = lvb_len;
1617 OBD_ALLOC(lock->l_lvb_data, lvb_len);
1618 if (lock->l_lvb_data == NULL)
1622 lock->l_lvb_type = lvb_type;
1623 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
1629 ldlm_lock_destroy(lock);
1630 LDLM_LOCK_RELEASE(lock);
1635 * Enqueue (request) a lock.
1637 * Does not block. As a result of enqueue the lock would be put
1638 * into granted or waiting list.
1640 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1641 * set, skip all the enqueueing and delegate lock processing to intent policy
1644 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
1645 struct ldlm_lock **lockp,
1646 void *cookie, __u64 *flags)
1648 struct ldlm_lock *lock = *lockp;
1649 struct ldlm_resource *res = lock->l_resource;
1650 int local = ns_is_client(ldlm_res_to_ns(res));
1651 ldlm_error_t rc = ELDLM_OK;
1652 struct ldlm_interval *node = NULL;
1655 lock->l_last_activity = cfs_time_current_sec();
1656 /* policies are not executed on the client or during replay */
1657 if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
1658 && !local && ns->ns_policy) {
1659 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
1661 if (rc == ELDLM_LOCK_REPLACED) {
1662 /* The lock that was returned has already been granted,
1663 * and placed into lockp. If it's not the same as the
1664 * one we passed in, then destroy the old one and our
1665 * work here is done. */
1666 if (lock != *lockp) {
1667 ldlm_lock_destroy(lock);
1668 LDLM_LOCK_RELEASE(lock);
1670 *flags |= LDLM_FL_LOCK_CHANGED;
1672 } else if (rc != ELDLM_OK ||
1673 (rc == ELDLM_OK && (*flags & LDLM_FL_INTENT_ONLY))) {
1674 ldlm_lock_destroy(lock);
1679 /* For a replaying lock, it might be already in granted list. So
1680 * unlinking the lock will cause the interval node to be freed, we
1681 * have to allocate the interval node early otherwise we can't regrant
1682 * this lock in the future. - jay */
1683 if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
1684 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
1686 lock_res_and_lock(lock);
1687 if (local && lock->l_req_mode == lock->l_granted_mode) {
1688 /* The server returned a blocked lock, but it was granted
1689 * before we got a chance to actually enqueue it. We don't
1690 * need to do anything else. */
1691 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
1692 LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
1693 GOTO(out, ELDLM_OK);
1696 ldlm_resource_unlink_lock(lock);
1697 if (res->lr_type == LDLM_EXTENT && lock->l_tree_node == NULL) {
1699 ldlm_lock_destroy_nolock(lock);
1700 GOTO(out, rc = -ENOMEM);
1703 INIT_LIST_HEAD(&node->li_group);
1704 ldlm_interval_attach(node, lock);
1708 /* Some flags from the enqueue want to make it into the AST, via the
1709 * lock's l_flags. */
1710 lock->l_flags |= *flags & LDLM_AST_DISCARD_DATA;
1712 /* This distinction between local lock trees is very important; a client
1713 * namespace only has information about locks taken by that client, and
1714 * thus doesn't have enough information to decide for itself if it can
1715 * be granted (below). In this case, we do exactly what the server
1716 * tells us to do, as dictated by the 'flags'.
1718 * We do exactly the same thing during recovery, when the server is
1719 * more or less trusting the clients not to lie.
1721 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1722 * granted/converting queues. */
1724 if (*flags & LDLM_FL_BLOCK_CONV)
1725 ldlm_resource_add_lock(res, &res->lr_converting, lock);
1726 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
1727 ldlm_resource_add_lock(res, &res->lr_waiting, lock);
1729 ldlm_grant_lock(lock, NULL);
1730 GOTO(out, ELDLM_OK);
1732 CERROR("This is client-side-only module, cannot handle "
1733 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1738 unlock_res_and_lock(lock);
1740 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
1746 * Process a call to blocking AST callback for a lock in ast_work list
1749 ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1751 struct ldlm_cb_set_arg *arg = opaq;
1752 struct ldlm_lock_desc d;
1754 struct ldlm_lock *lock;
1757 if (list_empty(arg->list))
1760 lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
1762 /* nobody should touch l_bl_ast */
1763 lock_res_and_lock(lock);
1764 list_del_init(&lock->l_bl_ast);
1766 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1767 LASSERT(lock->l_bl_ast_run == 0);
1768 LASSERT(lock->l_blocking_lock);
1769 lock->l_bl_ast_run++;
1770 unlock_res_and_lock(lock);
1772 ldlm_lock2desc(lock->l_blocking_lock, &d);
1774 rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
1775 LDLM_LOCK_RELEASE(lock->l_blocking_lock);
1776 lock->l_blocking_lock = NULL;
1777 LDLM_LOCK_RELEASE(lock);
1783 * Process a call to completion AST callback for a lock in ast_work list
1786 ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1788 struct ldlm_cb_set_arg *arg = opaq;
1790 struct ldlm_lock *lock;
1791 ldlm_completion_callback completion_callback;
1794 if (list_empty(arg->list))
1797 lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
1799 /* It's possible to receive a completion AST before we've set
1800 * the l_completion_ast pointer: either because the AST arrived
1801 * before the reply, or simply because there's a small race
1802 * window between receiving the reply and finishing the local
1803 * enqueue. (bug 842)
1805 * This can't happen with the blocking_ast, however, because we
1806 * will never call the local blocking_ast until we drop our
1807 * reader/writer reference, which we won't do until we get the
1808 * reply and finish enqueueing. */
1810 /* nobody should touch l_cp_ast */
1811 lock_res_and_lock(lock);
1812 list_del_init(&lock->l_cp_ast);
1813 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1814 /* save l_completion_ast since it can be changed by
1815 * mds_intent_policy(), see bug 14225 */
1816 completion_callback = lock->l_completion_ast;
1817 lock->l_flags &= ~LDLM_FL_CP_REQD;
1818 unlock_res_and_lock(lock);
1820 if (completion_callback != NULL)
1821 rc = completion_callback(lock, 0, (void *)arg);
1822 LDLM_LOCK_RELEASE(lock);
1828 * Process a call to revocation AST callback for a lock in ast_work list
1831 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1833 struct ldlm_cb_set_arg *arg = opaq;
1834 struct ldlm_lock_desc desc;
1836 struct ldlm_lock *lock;
1839 if (list_empty(arg->list))
1842 lock = list_entry(arg->list->next, struct ldlm_lock, l_rk_ast);
1843 list_del_init(&lock->l_rk_ast);
1845 /* the desc just pretend to exclusive */
1846 ldlm_lock2desc(lock, &desc);
1847 desc.l_req_mode = LCK_EX;
1848 desc.l_granted_mode = 0;
1850 rc = lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
1851 LDLM_LOCK_RELEASE(lock);
1857 * Process a call to glimpse AST callback for a lock in ast_work list
1859 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1861 struct ldlm_cb_set_arg *arg = opaq;
1862 struct ldlm_glimpse_work *gl_work;
1863 struct ldlm_lock *lock;
1867 if (list_empty(arg->list))
1870 gl_work = list_entry(arg->list->next, struct ldlm_glimpse_work,
1872 list_del_init(&gl_work->gl_list);
1874 lock = gl_work->gl_lock;
1876 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1877 arg->gl_desc = gl_work->gl_desc;
1879 /* invoke the actual glimpse callback */
1880 if (lock->l_glimpse_ast(lock, (void*)arg) == 0)
1883 LDLM_LOCK_RELEASE(lock);
1885 if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
1886 OBD_FREE_PTR(gl_work);
1892 * Process list of locks in need of ASTs being sent.
1894 * Used on server to send multiple ASTs together instead of sending one by
1897 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
1898 ldlm_desc_ast_t ast_type)
1900 struct ldlm_cb_set_arg *arg;
1901 set_producer_func work_ast_lock;
1904 if (list_empty(rpc_list))
1911 atomic_set(&arg->restart, 0);
1912 arg->list = rpc_list;
1915 case LDLM_WORK_BL_AST:
1916 arg->type = LDLM_BL_CALLBACK;
1917 work_ast_lock = ldlm_work_bl_ast_lock;
1919 case LDLM_WORK_CP_AST:
1920 arg->type = LDLM_CP_CALLBACK;
1921 work_ast_lock = ldlm_work_cp_ast_lock;
1923 case LDLM_WORK_REVOKE_AST:
1924 arg->type = LDLM_BL_CALLBACK;
1925 work_ast_lock = ldlm_work_revoke_ast_lock;
1927 case LDLM_WORK_GL_AST:
1928 arg->type = LDLM_GL_CALLBACK;
1929 work_ast_lock = ldlm_work_gl_ast_lock;
1935 /* We create a ptlrpc request set with flow control extension.
1936 * This request set will use the work_ast_lock function to produce new
1937 * requests and will send a new request each time one completes in order
1938 * to keep the number of requests in flight to ns_max_parallel_ast */
1939 arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
1940 work_ast_lock, arg);
1941 if (arg->set == NULL)
1942 GOTO(out, rc = -ENOMEM);
1944 ptlrpc_set_wait(arg->set);
1945 ptlrpc_set_destroy(arg->set);
1947 rc = atomic_read(&arg->restart) ? -ERESTART : 0;
1954 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
1956 ldlm_reprocess_all(res);
1957 return LDLM_ITER_CONTINUE;
1960 static int ldlm_reprocess_res(cfs_hash_t *hs, cfs_hash_bd_t *bd,
1961 struct hlist_node *hnode, void *arg)
1963 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1966 rc = reprocess_one_queue(res, arg);
1968 return rc == LDLM_ITER_STOP;
1972 * Iterate through all resources on a namespace attempting to grant waiting
1975 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
1980 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1981 ldlm_reprocess_res, NULL);
1985 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1988 * Try to grant all waiting locks on a resource.
1990 * Calls ldlm_reprocess_queue on converting and waiting queues.
1992 * Typically called after some resource locks are cancelled to see
1993 * if anything could be granted as a result of the cancellation.
1995 void ldlm_reprocess_all(struct ldlm_resource *res)
1997 LIST_HEAD(rpc_list);
2000 if (!ns_is_client(ldlm_res_to_ns(res))) {
2001 CERROR("This is client-side-only module, cannot handle "
2002 "LDLM_NAMESPACE_SERVER resource type lock.\n");
2009 * Helper function to call blocking AST for LDLM lock \a lock in a
2010 * "cancelling" mode.
2012 void ldlm_cancel_callback(struct ldlm_lock *lock)
2014 check_res_locked(lock->l_resource);
2015 if (!(lock->l_flags & LDLM_FL_CANCEL)) {
2016 lock->l_flags |= LDLM_FL_CANCEL;
2017 if (lock->l_blocking_ast) {
2018 unlock_res_and_lock(lock);
2019 lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
2021 lock_res_and_lock(lock);
2023 LDLM_DEBUG(lock, "no blocking ast");
2026 lock->l_flags |= LDLM_FL_BL_DONE;
2030 * Remove skiplist-enabled LDLM lock \a req from granted list
2032 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req)
2034 if (req->l_resource->lr_type != LDLM_PLAIN &&
2035 req->l_resource->lr_type != LDLM_IBITS)
2038 list_del_init(&req->l_sl_policy);
2039 list_del_init(&req->l_sl_mode);
2043 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
2045 void ldlm_lock_cancel(struct ldlm_lock *lock)
2047 struct ldlm_resource *res;
2048 struct ldlm_namespace *ns;
2051 lock_res_and_lock(lock);
2053 res = lock->l_resource;
2054 ns = ldlm_res_to_ns(res);
2056 /* Please do not, no matter how tempting, remove this LBUG without
2057 * talking to me first. -phik */
2058 if (lock->l_readers || lock->l_writers) {
2059 LDLM_ERROR(lock, "lock still has references");
2064 ldlm_del_waiting_lock(lock);
2066 /* Releases cancel callback. */
2067 ldlm_cancel_callback(lock);
2069 /* Yes, second time, just in case it was added again while we were
2070 running with no res lock in ldlm_cancel_callback */
2072 ldlm_del_waiting_lock(lock);
2074 ldlm_resource_unlink_lock(lock);
2075 ldlm_lock_destroy_nolock(lock);
2077 if (lock->l_granted_mode == lock->l_req_mode)
2078 ldlm_pool_del(&ns->ns_pool, lock);
2080 /* Make sure we will not be called again for same lock what is possible
2081 * if not to zero out lock->l_granted_mode */
2082 lock->l_granted_mode = LCK_MINMODE;
2083 unlock_res_and_lock(lock);
2087 EXPORT_SYMBOL(ldlm_lock_cancel);
2090 * Set opaque data into the lock that only makes sense to upper layer.
2092 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
2094 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2099 if (lock->l_ast_data == NULL)
2100 lock->l_ast_data = data;
2101 if (lock->l_ast_data == data)
2103 LDLM_LOCK_PUT(lock);
2107 EXPORT_SYMBOL(ldlm_lock_set_data);
2109 struct export_cl_data {
2110 struct obd_export *ecl_exp;
2115 * Iterator function for ldlm_cancel_locks_for_export.
2116 * Cancels passed locks.
2118 int ldlm_cancel_locks_for_export_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2119 struct hlist_node *hnode, void *data)
2122 struct export_cl_data *ecl = (struct export_cl_data *)data;
2123 struct obd_export *exp = ecl->ecl_exp;
2124 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2125 struct ldlm_resource *res;
2127 res = ldlm_resource_getref(lock->l_resource);
2128 LDLM_LOCK_GET(lock);
2130 LDLM_DEBUG(lock, "export %p", exp);
2131 ldlm_res_lvbo_update(res, NULL, 1);
2132 ldlm_lock_cancel(lock);
2133 ldlm_reprocess_all(res);
2134 ldlm_resource_putref(res);
2135 LDLM_LOCK_RELEASE(lock);
2138 if ((ecl->ecl_loop & -ecl->ecl_loop) == ecl->ecl_loop) {
2140 "Cancel lock %p for export %p (loop %d), still have "
2141 "%d locks left on hash table.\n",
2142 lock, exp, ecl->ecl_loop,
2143 atomic_read(&hs->hs_count));
2150 * Cancel all locks for given export.
2152 * Typically called on client disconnection/eviction
2154 void ldlm_cancel_locks_for_export(struct obd_export *exp)
2156 struct export_cl_data ecl = {
2161 cfs_hash_for_each_empty(exp->exp_lock_hash,
2162 ldlm_cancel_locks_for_export_cb, &ecl);
2166 * Downgrade an exclusive lock.
2168 * A fast variant of ldlm_lock_convert for convertion of exclusive
2169 * locks. The convertion is always successful.
2170 * Used by Commit on Sharing (COS) code.
2172 * \param lock A lock to convert
2173 * \param new_mode new lock mode
2175 void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
2179 LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
2180 LASSERT(new_mode == LCK_COS);
2182 lock_res_and_lock(lock);
2183 ldlm_resource_unlink_lock(lock);
2185 * Remove the lock from pool as it will be added again in
2186 * ldlm_grant_lock() called below.
2188 ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
2190 lock->l_req_mode = new_mode;
2191 ldlm_grant_lock(lock, NULL);
2192 unlock_res_and_lock(lock);
2193 ldlm_reprocess_all(lock->l_resource);
2197 EXPORT_SYMBOL(ldlm_lock_downgrade);
2200 * Attempt to convert already granted lock to a different mode.
2202 * While lock conversion is not currently used, future client-side
2203 * optimizations could take advantage of it to avoid discarding cached
2206 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
2209 LIST_HEAD(rpc_list);
2210 struct ldlm_resource *res;
2211 struct ldlm_namespace *ns;
2213 struct ldlm_interval *node;
2216 /* Just return if mode is unchanged. */
2217 if (new_mode == lock->l_granted_mode) {
2218 *flags |= LDLM_FL_BLOCK_GRANTED;
2219 RETURN(lock->l_resource);
2222 /* I can't check the type of lock here because the bitlock of lock
2223 * is not held here, so do the allocation blindly. -jay */
2224 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
2225 if (node == NULL) /* Actually, this causes EDEADLOCK to be returned */
2228 LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
2229 "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
2231 lock_res_and_lock(lock);
2233 res = lock->l_resource;
2234 ns = ldlm_res_to_ns(res);
2236 lock->l_req_mode = new_mode;
2237 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
2238 ldlm_resource_unlink_lock(lock);
2240 ldlm_resource_unlink_lock(lock);
2241 if (res->lr_type == LDLM_EXTENT) {
2242 /* FIXME: ugly code, I have to attach the lock to a
2243 * interval node again since perhaps it will be granted
2245 INIT_LIST_HEAD(&node->li_group);
2246 ldlm_interval_attach(node, lock);
2252 * Remove old lock from the pool before adding the lock with new
2253 * mode below in ->policy()
2255 ldlm_pool_del(&ns->ns_pool, lock);
2257 /* If this is a local resource, put it on the appropriate list. */
2258 if (ns_is_client(ldlm_res_to_ns(res))) {
2259 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
2260 ldlm_resource_add_lock(res, &res->lr_converting, lock);
2262 /* This should never happen, because of the way the
2263 * server handles conversions. */
2264 LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
2268 ldlm_grant_lock(lock, &rpc_list);
2270 /* FIXME: completion handling not with lr_lock held ! */
2271 if (lock->l_completion_ast)
2272 lock->l_completion_ast(lock, 0, NULL);
2275 CERROR("This is client-side-only module, cannot handle "
2276 "LDLM_NAMESPACE_SERVER resource type lock.\n");
2279 unlock_res_and_lock(lock);
2282 ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
2284 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
2287 EXPORT_SYMBOL(ldlm_lock_convert);
2290 * Print lock with lock handle \a lockh description into debug log.
2292 * Used when printing all locks on a resource for debug purposes.
2294 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
2296 struct ldlm_lock *lock;
2298 if (!((libcfs_debug | D_ERROR) & level))
2301 lock = ldlm_handle2lock(lockh);
2305 LDLM_DEBUG_LIMIT(level, lock, "###");
2307 LDLM_LOCK_PUT(lock);
2309 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2312 * Print lock information with custom message into debug log.
2315 void _ldlm_lock_debug(struct ldlm_lock *lock,
2316 struct libcfs_debug_msg_data *msgdata,
2317 const char *fmt, ...)
2320 struct obd_export *exp = lock->l_export;
2321 struct ldlm_resource *resource = lock->l_resource;
2322 char *nid = "local";
2324 va_start(args, fmt);
2326 if (exp && exp->exp_connection) {
2327 nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
2328 } else if (exp && exp->exp_obd != NULL) {
2329 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
2330 nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
2333 if (resource == NULL) {
2334 libcfs_debug_vmsg2(msgdata, fmt, args,
2335 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2336 "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" nid: %s "
2337 "remote: "LPX64" expref: %d pid: %u timeout: %lu "
2340 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2341 lock->l_readers, lock->l_writers,
2342 ldlm_lockname[lock->l_granted_mode],
2343 ldlm_lockname[lock->l_req_mode],
2344 lock->l_flags, nid, lock->l_remote_handle.cookie,
2345 exp ? atomic_read(&exp->exp_refcount) : -99,
2346 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2351 switch (resource->lr_type) {
2353 libcfs_debug_vmsg2(msgdata, fmt, args,
2354 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2355 "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64
2356 "] (req "LPU64"->"LPU64") flags: "LPX64" nid: %s remote:"
2357 " "LPX64" expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2358 ldlm_lock_to_ns_name(lock), lock,
2359 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2360 lock->l_readers, lock->l_writers,
2361 ldlm_lockname[lock->l_granted_mode],
2362 ldlm_lockname[lock->l_req_mode],
2363 resource->lr_name.name[0],
2364 resource->lr_name.name[1],
2365 atomic_read(&resource->lr_refcount),
2366 ldlm_typename[resource->lr_type],
2367 lock->l_policy_data.l_extent.start,
2368 lock->l_policy_data.l_extent.end,
2369 lock->l_req_extent.start, lock->l_req_extent.end,
2370 lock->l_flags, nid, lock->l_remote_handle.cookie,
2371 exp ? atomic_read(&exp->exp_refcount) : -99,
2372 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2376 libcfs_debug_vmsg2(msgdata, fmt, args,
2377 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2378 "res: "LPU64"/"LPU64" rrc: %d type: %s pid: %d "
2379 "["LPU64"->"LPU64"] flags: "LPX64" nid: %s remote: "LPX64
2380 " expref: %d pid: %u timeout: %lu\n",
2381 ldlm_lock_to_ns_name(lock), lock,
2382 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2383 lock->l_readers, lock->l_writers,
2384 ldlm_lockname[lock->l_granted_mode],
2385 ldlm_lockname[lock->l_req_mode],
2386 resource->lr_name.name[0],
2387 resource->lr_name.name[1],
2388 atomic_read(&resource->lr_refcount),
2389 ldlm_typename[resource->lr_type],
2390 lock->l_policy_data.l_flock.pid,
2391 lock->l_policy_data.l_flock.start,
2392 lock->l_policy_data.l_flock.end,
2393 lock->l_flags, nid, lock->l_remote_handle.cookie,
2394 exp ? atomic_read(&exp->exp_refcount) : -99,
2395 lock->l_pid, lock->l_callback_timeout);
2399 libcfs_debug_vmsg2(msgdata, fmt, args,
2400 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2401 "res: "LPU64"/"LPU64" bits "LPX64" rrc: %d type: %s "
2402 "flags: "LPX64" nid: %s remote: "LPX64" expref: %d "
2403 "pid: %u timeout: %lu lvb_type: %d\n",
2404 ldlm_lock_to_ns_name(lock),
2405 lock, lock->l_handle.h_cookie,
2406 atomic_read (&lock->l_refc),
2407 lock->l_readers, lock->l_writers,
2408 ldlm_lockname[lock->l_granted_mode],
2409 ldlm_lockname[lock->l_req_mode],
2410 resource->lr_name.name[0],
2411 resource->lr_name.name[1],
2412 lock->l_policy_data.l_inodebits.bits,
2413 atomic_read(&resource->lr_refcount),
2414 ldlm_typename[resource->lr_type],
2415 lock->l_flags, nid, lock->l_remote_handle.cookie,
2416 exp ? atomic_read(&exp->exp_refcount) : -99,
2417 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2421 libcfs_debug_vmsg2(msgdata, fmt, args,
2422 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2423 "res: "LPU64"/"LPU64" rrc: %d type: %s flags: "LPX64" "
2424 "nid: %s remote: "LPX64" expref: %d pid: %u timeout: %lu"
2426 ldlm_lock_to_ns_name(lock),
2427 lock, lock->l_handle.h_cookie,
2428 atomic_read (&lock->l_refc),
2429 lock->l_readers, lock->l_writers,
2430 ldlm_lockname[lock->l_granted_mode],
2431 ldlm_lockname[lock->l_req_mode],
2432 resource->lr_name.name[0],
2433 resource->lr_name.name[1],
2434 atomic_read(&resource->lr_refcount),
2435 ldlm_typename[resource->lr_type],
2436 lock->l_flags, nid, lock->l_remote_handle.cookie,
2437 exp ? atomic_read(&exp->exp_refcount) : -99,
2438 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2443 EXPORT_SYMBOL(_ldlm_lock_debug);