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 if (lock->l_flags & LDLM_FL_LOCAL &&
865 !lock->l_readers && !lock->l_writers) {
866 /* If this is a local lock on a server namespace and this was
867 * the last reference, cancel the lock. */
868 CDEBUG(D_INFO, "forcing cancel of local lock\n");
869 lock->l_flags |= LDLM_FL_CBPENDING;
872 if (!lock->l_readers && !lock->l_writers &&
873 (lock->l_flags & LDLM_FL_CBPENDING)) {
874 /* If we received a blocked AST and this was the last reference,
875 * run the callback. */
876 if (lock->l_ns_srv && lock->l_export)
877 CERROR("FL_CBPENDING set on non-local lock--just a "
880 LDLM_DEBUG(lock, "final decref done on cbpending lock");
882 LDLM_LOCK_GET(lock); /* dropped by bl thread */
883 ldlm_lock_remove_from_lru(lock);
884 unlock_res_and_lock(lock);
886 if (lock->l_flags & LDLM_FL_FAIL_LOC)
887 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
889 if ((lock->l_flags & LDLM_FL_ATOMIC_CB) ||
890 ldlm_bl_to_thread_lock(ns, NULL, lock) != 0)
891 ldlm_handle_bl_callback(ns, NULL, lock);
892 } else if (ns_is_client(ns) &&
893 !lock->l_readers && !lock->l_writers &&
894 !(lock->l_flags & LDLM_FL_NO_LRU) &&
895 !(lock->l_flags & LDLM_FL_BL_AST)) {
897 LDLM_DEBUG(lock, "add lock into lru list");
899 /* If this is a client-side namespace and this was the last
900 * reference, put it on the LRU. */
901 ldlm_lock_add_to_lru(lock);
902 unlock_res_and_lock(lock);
904 if (lock->l_flags & LDLM_FL_FAIL_LOC)
905 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
907 /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
908 * are not supported by the server, otherwise, it is done on
910 if (!exp_connect_cancelset(lock->l_conn_export) &&
911 !ns_connect_lru_resize(ns))
912 ldlm_cancel_lru(ns, 0, LCF_ASYNC, 0);
914 LDLM_DEBUG(lock, "do not add lock into lru list");
915 unlock_res_and_lock(lock);
922 * Decrease reader/writer refcount for LDLM lock with handle \a lockh
924 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
926 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
927 LASSERTF(lock != NULL, "Non-existing lock: "LPX64"\n", lockh->cookie);
928 ldlm_lock_decref_internal(lock, mode);
931 EXPORT_SYMBOL(ldlm_lock_decref);
934 * Decrease reader/writer refcount for LDLM lock with handle
935 * \a lockh and mark it for subsequent cancellation once r/w refcount
936 * drops to zero instead of putting into LRU.
938 * Typical usage is for GROUP locks which we cannot allow to be cached.
940 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
942 struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
945 LASSERT(lock != NULL);
947 LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
948 lock_res_and_lock(lock);
949 lock->l_flags |= LDLM_FL_CBPENDING;
950 unlock_res_and_lock(lock);
951 ldlm_lock_decref_internal(lock, mode);
954 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
956 struct sl_insert_point {
957 struct list_head *res_link;
958 struct list_head *mode_link;
959 struct list_head *policy_link;
963 * Finds a position to insert the new lock into granted lock list.
965 * Used for locks eligible for skiplist optimization.
968 * queue [input]: the granted list where search acts on;
969 * req [input]: the lock whose position to be located;
970 * prev [output]: positions within 3 lists to insert @req to
974 * - ldlm_grant_lock_with_skiplist
976 static void search_granted_lock(struct list_head *queue,
977 struct ldlm_lock *req,
978 struct sl_insert_point *prev)
980 struct list_head *tmp;
981 struct ldlm_lock *lock, *mode_end, *policy_end;
984 list_for_each(tmp, queue) {
985 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
987 mode_end = list_entry(lock->l_sl_mode.prev,
988 struct ldlm_lock, l_sl_mode);
990 if (lock->l_req_mode != req->l_req_mode) {
991 /* jump to last lock of mode group */
992 tmp = &mode_end->l_res_link;
996 /* suitable mode group is found */
997 if (lock->l_resource->lr_type == LDLM_PLAIN) {
998 /* insert point is last lock of the mode group */
999 prev->res_link = &mode_end->l_res_link;
1000 prev->mode_link = &mode_end->l_sl_mode;
1001 prev->policy_link = &req->l_sl_policy;
1004 } else if (lock->l_resource->lr_type == LDLM_IBITS) {
1007 list_entry(lock->l_sl_policy.prev,
1011 if (lock->l_policy_data.l_inodebits.bits ==
1012 req->l_policy_data.l_inodebits.bits) {
1013 /* insert point is last lock of
1014 * the policy group */
1016 &policy_end->l_res_link;
1018 &policy_end->l_sl_mode;
1020 &policy_end->l_sl_policy;
1025 if (policy_end == mode_end)
1026 /* done with mode group */
1029 /* go to next policy group within mode group */
1030 tmp = policy_end->l_res_link.next;
1031 lock = list_entry(tmp, struct ldlm_lock,
1033 } /* loop over policy groups within the mode group */
1035 /* insert point is last lock of the mode group,
1036 * new policy group is started */
1037 prev->res_link = &mode_end->l_res_link;
1038 prev->mode_link = &mode_end->l_sl_mode;
1039 prev->policy_link = &req->l_sl_policy;
1043 LDLM_ERROR(lock,"is not LDLM_PLAIN or LDLM_IBITS lock");
1048 /* insert point is last lock on the queue,
1049 * new mode group and new policy group are started */
1050 prev->res_link = queue->prev;
1051 prev->mode_link = &req->l_sl_mode;
1052 prev->policy_link = &req->l_sl_policy;
1058 * Add a lock into resource granted list after a position described by
1061 static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
1062 struct sl_insert_point *prev)
1064 struct ldlm_resource *res = lock->l_resource;
1067 check_res_locked(res);
1069 ldlm_resource_dump(D_INFO, res);
1070 LDLM_DEBUG(lock, "About to add lock:");
1072 if (lock->l_destroyed) {
1073 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1077 LASSERT(list_empty(&lock->l_res_link));
1078 LASSERT(list_empty(&lock->l_sl_mode));
1079 LASSERT(list_empty(&lock->l_sl_policy));
1082 * lock->link == prev->link means lock is first starting the group.
1083 * Don't re-add to itself to suppress kernel warnings.
1085 if (&lock->l_res_link != prev->res_link)
1086 list_add(&lock->l_res_link, prev->res_link);
1087 if (&lock->l_sl_mode != prev->mode_link)
1088 list_add(&lock->l_sl_mode, prev->mode_link);
1089 if (&lock->l_sl_policy != prev->policy_link)
1090 list_add(&lock->l_sl_policy, prev->policy_link);
1096 * Add a lock to granted list on a resource maintaining skiplist
1099 static void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
1101 struct sl_insert_point prev;
1104 LASSERT(lock->l_req_mode == lock->l_granted_mode);
1106 search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
1107 ldlm_granted_list_add_lock(lock, &prev);
1112 * Perform lock granting bookkeeping.
1114 * Includes putting the lock into granted list and updating lock mode.
1116 * - ldlm_lock_enqueue
1117 * - ldlm_reprocess_queue
1118 * - ldlm_lock_convert
1120 * must be called with lr_lock held
1122 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
1124 struct ldlm_resource *res = lock->l_resource;
1127 check_res_locked(res);
1129 lock->l_granted_mode = lock->l_req_mode;
1130 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS)
1131 ldlm_grant_lock_with_skiplist(lock);
1132 else if (res->lr_type == LDLM_EXTENT)
1133 ldlm_extent_add_lock(res, lock);
1135 ldlm_resource_add_lock(res, &res->lr_granted, lock);
1137 if (lock->l_granted_mode < res->lr_most_restr)
1138 res->lr_most_restr = lock->l_granted_mode;
1140 if (work_list && lock->l_completion_ast != NULL)
1141 ldlm_add_ast_work_item(lock, NULL, work_list);
1143 ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
1148 * Search for a lock with given properties in a queue.
1150 * \retval a referenced lock or NULL. See the flag descriptions below, in the
1151 * comment above ldlm_lock_match
1153 static struct ldlm_lock *search_queue(struct list_head *queue,
1155 ldlm_policy_data_t *policy,
1156 struct ldlm_lock *old_lock,
1157 __u64 flags, int unref)
1159 struct ldlm_lock *lock;
1160 struct list_head *tmp;
1162 list_for_each(tmp, queue) {
1165 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
1167 if (lock == old_lock)
1170 /* llite sometimes wants to match locks that will be
1171 * canceled when their users drop, but we allow it to match
1172 * if it passes in CBPENDING and the lock still has users.
1173 * this is generally only going to be used by children
1174 * whose parents already hold a lock so forward progress
1175 * can still happen. */
1176 if (lock->l_flags & LDLM_FL_CBPENDING &&
1177 !(flags & LDLM_FL_CBPENDING))
1179 if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
1180 lock->l_readers == 0 && lock->l_writers == 0)
1183 if (!(lock->l_req_mode & *mode))
1185 match = lock->l_req_mode;
1187 if (lock->l_resource->lr_type == LDLM_EXTENT &&
1188 (lock->l_policy_data.l_extent.start >
1189 policy->l_extent.start ||
1190 lock->l_policy_data.l_extent.end < policy->l_extent.end))
1193 if (unlikely(match == LCK_GROUP) &&
1194 lock->l_resource->lr_type == LDLM_EXTENT &&
1195 lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
1198 /* We match if we have existing lock with same or wider set
1200 if (lock->l_resource->lr_type == LDLM_IBITS &&
1201 ((lock->l_policy_data.l_inodebits.bits &
1202 policy->l_inodebits.bits) !=
1203 policy->l_inodebits.bits))
1207 (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED ||
1211 if ((flags & LDLM_FL_LOCAL_ONLY) &&
1212 !(lock->l_flags & LDLM_FL_LOCAL))
1215 if (flags & LDLM_FL_TEST_LOCK) {
1216 LDLM_LOCK_GET(lock);
1217 ldlm_lock_touch_in_lru(lock);
1219 ldlm_lock_addref_internal_nolock(lock, match);
1228 void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
1230 if (!lock->l_failed) {
1232 wake_up_all(&lock->l_waitq);
1235 EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
1237 void ldlm_lock_fail_match(struct ldlm_lock *lock)
1239 lock_res_and_lock(lock);
1240 ldlm_lock_fail_match_locked(lock);
1241 unlock_res_and_lock(lock);
1243 EXPORT_SYMBOL(ldlm_lock_fail_match);
1246 * Mark lock as "matchable" by OST.
1248 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1250 * Assumes LDLM lock is already locked.
1252 void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
1254 lock->l_flags |= LDLM_FL_LVB_READY;
1255 wake_up_all(&lock->l_waitq);
1257 EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
1260 * Mark lock as "matchable" by OST.
1261 * Locks the lock and then \see ldlm_lock_allow_match_locked
1263 void ldlm_lock_allow_match(struct ldlm_lock *lock)
1265 lock_res_and_lock(lock);
1266 ldlm_lock_allow_match_locked(lock);
1267 unlock_res_and_lock(lock);
1269 EXPORT_SYMBOL(ldlm_lock_allow_match);
1272 * Attempt to find a lock with specified properties.
1274 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1277 * Can be called in two ways:
1279 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1280 * for a duplicate of.
1282 * Otherwise, all of the fields must be filled in, to match against.
1284 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1285 * server (ie, connh is NULL)
1286 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1287 * list will be considered
1288 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1289 * to be canceled can still be matched as long as they still have reader
1290 * or writer refernces
1291 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1292 * just tell us if we would have matched.
1294 * \retval 1 if it finds an already-existing lock that is compatible; in this
1295 * case, lockh is filled in with a addref()ed lock
1297 * We also check security context, and if that fails we simply return 0 (to
1298 * keep caller code unchanged), the context failure will be discovered by
1299 * caller sometime later.
1301 ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
1302 const struct ldlm_res_id *res_id, ldlm_type_t type,
1303 ldlm_policy_data_t *policy, ldlm_mode_t mode,
1304 struct lustre_handle *lockh, int unref)
1306 struct ldlm_resource *res;
1307 struct ldlm_lock *lock, *old_lock = NULL;
1312 old_lock = ldlm_handle2lock(lockh);
1315 ns = ldlm_lock_to_ns(old_lock);
1316 res_id = &old_lock->l_resource->lr_name;
1317 type = old_lock->l_resource->lr_type;
1318 mode = old_lock->l_req_mode;
1321 res = ldlm_resource_get(ns, NULL, res_id, type, 0);
1323 LASSERT(old_lock == NULL);
1327 LDLM_RESOURCE_ADDREF(res);
1330 lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
1334 if (flags & LDLM_FL_BLOCK_GRANTED)
1336 lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
1340 lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
1348 LDLM_RESOURCE_DELREF(res);
1349 ldlm_resource_putref(res);
1352 ldlm_lock2handle(lock, lockh);
1353 if ((flags & LDLM_FL_LVB_READY) &&
1354 (!(lock->l_flags & LDLM_FL_LVB_READY))) {
1355 struct l_wait_info lwi;
1356 if (lock->l_completion_ast) {
1357 int err = lock->l_completion_ast(lock,
1358 LDLM_FL_WAIT_NOREPROC,
1361 if (flags & LDLM_FL_TEST_LOCK)
1362 LDLM_LOCK_RELEASE(lock);
1364 ldlm_lock_decref_internal(lock,
1371 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
1372 NULL, LWI_ON_SIGNAL_NOOP, NULL);
1374 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1375 l_wait_event(lock->l_waitq,
1376 lock->l_flags & LDLM_FL_LVB_READY ||
1377 lock->l_destroyed || lock->l_failed,
1379 if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
1380 if (flags & LDLM_FL_TEST_LOCK)
1381 LDLM_LOCK_RELEASE(lock);
1383 ldlm_lock_decref_internal(lock, mode);
1390 LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
1391 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1392 res_id->name[2] : policy->l_extent.start,
1393 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1394 res_id->name[3] : policy->l_extent.end);
1396 /* check user's security context */
1397 if (lock->l_conn_export &&
1398 sptlrpc_import_check_ctx(
1399 class_exp2cliimp(lock->l_conn_export))) {
1400 if (!(flags & LDLM_FL_TEST_LOCK))
1401 ldlm_lock_decref_internal(lock, mode);
1405 if (flags & LDLM_FL_TEST_LOCK)
1406 LDLM_LOCK_RELEASE(lock);
1408 } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
1409 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
1410 LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
1411 type, mode, res_id->name[0], res_id->name[1],
1412 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1413 res_id->name[2] :policy->l_extent.start,
1414 (type == LDLM_PLAIN || type == LDLM_IBITS) ?
1415 res_id->name[3] : policy->l_extent.end);
1418 LDLM_LOCK_PUT(old_lock);
1420 return rc ? mode : 0;
1422 EXPORT_SYMBOL(ldlm_lock_match);
1424 ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
1427 struct ldlm_lock *lock;
1428 ldlm_mode_t mode = 0;
1431 lock = ldlm_handle2lock(lockh);
1433 lock_res_and_lock(lock);
1434 if (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED ||
1438 if (lock->l_flags & LDLM_FL_CBPENDING &&
1439 lock->l_readers == 0 && lock->l_writers == 0)
1443 *bits = lock->l_policy_data.l_inodebits.bits;
1444 mode = lock->l_granted_mode;
1445 ldlm_lock_addref_internal_nolock(lock, mode);
1452 unlock_res_and_lock(lock);
1453 LDLM_LOCK_PUT(lock);
1457 EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
1459 /** The caller must guarantee that the buffer is large enough. */
1460 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
1461 enum req_location loc, void *data, int size)
1466 LASSERT(data != NULL);
1469 switch (lock->l_lvb_type) {
1471 if (size == sizeof(struct ost_lvb)) {
1472 if (loc == RCL_CLIENT)
1473 lvb = req_capsule_client_swab_get(pill,
1475 lustre_swab_ost_lvb);
1477 lvb = req_capsule_server_swab_get(pill,
1479 lustre_swab_ost_lvb);
1480 if (unlikely(lvb == NULL)) {
1481 LDLM_ERROR(lock, "no LVB");
1485 memcpy(data, lvb, size);
1486 } else if (size == sizeof(struct ost_lvb_v1)) {
1487 struct ost_lvb *olvb = data;
1489 if (loc == RCL_CLIENT)
1490 lvb = req_capsule_client_swab_get(pill,
1492 lustre_swab_ost_lvb_v1);
1494 lvb = req_capsule_server_sized_swab_get(pill,
1496 lustre_swab_ost_lvb_v1);
1497 if (unlikely(lvb == NULL)) {
1498 LDLM_ERROR(lock, "no LVB");
1502 memcpy(data, lvb, size);
1503 olvb->lvb_mtime_ns = 0;
1504 olvb->lvb_atime_ns = 0;
1505 olvb->lvb_ctime_ns = 0;
1507 LDLM_ERROR(lock, "Replied unexpected ost LVB size %d",
1513 if (size == sizeof(struct lquota_lvb)) {
1514 if (loc == RCL_CLIENT)
1515 lvb = req_capsule_client_swab_get(pill,
1517 lustre_swab_lquota_lvb);
1519 lvb = req_capsule_server_swab_get(pill,
1521 lustre_swab_lquota_lvb);
1522 if (unlikely(lvb == NULL)) {
1523 LDLM_ERROR(lock, "no LVB");
1527 memcpy(data, lvb, size);
1529 LDLM_ERROR(lock, "Replied unexpected lquota LVB size %d",
1538 if (loc == RCL_CLIENT)
1539 lvb = req_capsule_client_get(pill, &RMF_DLM_LVB);
1541 lvb = req_capsule_server_get(pill, &RMF_DLM_LVB);
1542 if (unlikely(lvb == NULL)) {
1543 LDLM_ERROR(lock, "no LVB");
1547 memcpy(data, lvb, size);
1550 LDLM_ERROR(lock, "Unknown LVB type: %d\n", lock->l_lvb_type);
1551 libcfs_debug_dumpstack(NULL);
1559 * Create and fill in new LDLM lock with specified properties.
1560 * Returns a referenced lock
1562 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
1563 const struct ldlm_res_id *res_id,
1566 const struct ldlm_callback_suite *cbs,
1567 void *data, __u32 lvb_len,
1568 enum lvb_type lvb_type)
1570 struct ldlm_lock *lock;
1571 struct ldlm_resource *res;
1574 res = ldlm_resource_get(ns, NULL, res_id, type, 1);
1578 lock = ldlm_lock_new(res);
1583 lock->l_req_mode = mode;
1584 lock->l_ast_data = data;
1585 lock->l_pid = current_pid();
1586 lock->l_ns_srv = !!ns_is_server(ns);
1588 lock->l_blocking_ast = cbs->lcs_blocking;
1589 lock->l_completion_ast = cbs->lcs_completion;
1590 lock->l_glimpse_ast = cbs->lcs_glimpse;
1591 lock->l_weigh_ast = cbs->lcs_weigh;
1594 lock->l_tree_node = NULL;
1595 /* if this is the extent lock, allocate the interval tree node */
1596 if (type == LDLM_EXTENT) {
1597 if (ldlm_interval_alloc(lock) == NULL)
1602 lock->l_lvb_len = lvb_len;
1603 OBD_ALLOC(lock->l_lvb_data, lvb_len);
1604 if (lock->l_lvb_data == NULL)
1608 lock->l_lvb_type = lvb_type;
1609 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
1615 ldlm_lock_destroy(lock);
1616 LDLM_LOCK_RELEASE(lock);
1621 * Enqueue (request) a lock.
1623 * Does not block. As a result of enqueue the lock would be put
1624 * into granted or waiting list.
1626 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1627 * set, skip all the enqueueing and delegate lock processing to intent policy
1630 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
1631 struct ldlm_lock **lockp,
1632 void *cookie, __u64 *flags)
1634 struct ldlm_lock *lock = *lockp;
1635 struct ldlm_resource *res = lock->l_resource;
1636 int local = ns_is_client(ldlm_res_to_ns(res));
1637 ldlm_error_t rc = ELDLM_OK;
1638 struct ldlm_interval *node = NULL;
1641 lock->l_last_activity = cfs_time_current_sec();
1642 /* policies are not executed on the client or during replay */
1643 if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
1644 && !local && ns->ns_policy) {
1645 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
1647 if (rc == ELDLM_LOCK_REPLACED) {
1648 /* The lock that was returned has already been granted,
1649 * and placed into lockp. If it's not the same as the
1650 * one we passed in, then destroy the old one and our
1651 * work here is done. */
1652 if (lock != *lockp) {
1653 ldlm_lock_destroy(lock);
1654 LDLM_LOCK_RELEASE(lock);
1656 *flags |= LDLM_FL_LOCK_CHANGED;
1658 } else if (rc != ELDLM_OK ||
1659 (rc == ELDLM_OK && (*flags & LDLM_FL_INTENT_ONLY))) {
1660 ldlm_lock_destroy(lock);
1665 /* For a replaying lock, it might be already in granted list. So
1666 * unlinking the lock will cause the interval node to be freed, we
1667 * have to allocate the interval node early otherwise we can't regrant
1668 * this lock in the future. - jay */
1669 if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
1670 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
1672 lock_res_and_lock(lock);
1673 if (local && lock->l_req_mode == lock->l_granted_mode) {
1674 /* The server returned a blocked lock, but it was granted
1675 * before we got a chance to actually enqueue it. We don't
1676 * need to do anything else. */
1677 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
1678 LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
1679 GOTO(out, ELDLM_OK);
1682 ldlm_resource_unlink_lock(lock);
1683 if (res->lr_type == LDLM_EXTENT && lock->l_tree_node == NULL) {
1685 ldlm_lock_destroy_nolock(lock);
1686 GOTO(out, rc = -ENOMEM);
1689 INIT_LIST_HEAD(&node->li_group);
1690 ldlm_interval_attach(node, lock);
1694 /* Some flags from the enqueue want to make it into the AST, via the
1695 * lock's l_flags. */
1696 lock->l_flags |= *flags & LDLM_AST_DISCARD_DATA;
1698 /* This distinction between local lock trees is very important; a client
1699 * namespace only has information about locks taken by that client, and
1700 * thus doesn't have enough information to decide for itself if it can
1701 * be granted (below). In this case, we do exactly what the server
1702 * tells us to do, as dictated by the 'flags'.
1704 * We do exactly the same thing during recovery, when the server is
1705 * more or less trusting the clients not to lie.
1707 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1708 * granted/converting queues. */
1710 if (*flags & LDLM_FL_BLOCK_CONV)
1711 ldlm_resource_add_lock(res, &res->lr_converting, lock);
1712 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
1713 ldlm_resource_add_lock(res, &res->lr_waiting, lock);
1715 ldlm_grant_lock(lock, NULL);
1716 GOTO(out, ELDLM_OK);
1718 CERROR("This is client-side-only module, cannot handle "
1719 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1724 unlock_res_and_lock(lock);
1726 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
1732 * Process a call to blocking AST callback for a lock in ast_work list
1735 ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1737 struct ldlm_cb_set_arg *arg = opaq;
1738 struct ldlm_lock_desc d;
1740 struct ldlm_lock *lock;
1743 if (list_empty(arg->list))
1746 lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
1748 /* nobody should touch l_bl_ast */
1749 lock_res_and_lock(lock);
1750 list_del_init(&lock->l_bl_ast);
1752 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1753 LASSERT(lock->l_bl_ast_run == 0);
1754 LASSERT(lock->l_blocking_lock);
1755 lock->l_bl_ast_run++;
1756 unlock_res_and_lock(lock);
1758 ldlm_lock2desc(lock->l_blocking_lock, &d);
1760 rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
1761 LDLM_LOCK_RELEASE(lock->l_blocking_lock);
1762 lock->l_blocking_lock = NULL;
1763 LDLM_LOCK_RELEASE(lock);
1769 * Process a call to completion AST callback for a lock in ast_work list
1772 ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1774 struct ldlm_cb_set_arg *arg = opaq;
1776 struct ldlm_lock *lock;
1777 ldlm_completion_callback completion_callback;
1780 if (list_empty(arg->list))
1783 lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
1785 /* It's possible to receive a completion AST before we've set
1786 * the l_completion_ast pointer: either because the AST arrived
1787 * before the reply, or simply because there's a small race
1788 * window between receiving the reply and finishing the local
1789 * enqueue. (bug 842)
1791 * This can't happen with the blocking_ast, however, because we
1792 * will never call the local blocking_ast until we drop our
1793 * reader/writer reference, which we won't do until we get the
1794 * reply and finish enqueueing. */
1796 /* nobody should touch l_cp_ast */
1797 lock_res_and_lock(lock);
1798 list_del_init(&lock->l_cp_ast);
1799 LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
1800 /* save l_completion_ast since it can be changed by
1801 * mds_intent_policy(), see bug 14225 */
1802 completion_callback = lock->l_completion_ast;
1803 lock->l_flags &= ~LDLM_FL_CP_REQD;
1804 unlock_res_and_lock(lock);
1806 if (completion_callback != NULL)
1807 rc = completion_callback(lock, 0, (void *)arg);
1808 LDLM_LOCK_RELEASE(lock);
1814 * Process a call to revocation AST callback for a lock in ast_work list
1817 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1819 struct ldlm_cb_set_arg *arg = opaq;
1820 struct ldlm_lock_desc desc;
1822 struct ldlm_lock *lock;
1825 if (list_empty(arg->list))
1828 lock = list_entry(arg->list->next, struct ldlm_lock, l_rk_ast);
1829 list_del_init(&lock->l_rk_ast);
1831 /* the desc just pretend to exclusive */
1832 ldlm_lock2desc(lock, &desc);
1833 desc.l_req_mode = LCK_EX;
1834 desc.l_granted_mode = 0;
1836 rc = lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
1837 LDLM_LOCK_RELEASE(lock);
1843 * Process a call to glimpse AST callback for a lock in ast_work list
1845 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
1847 struct ldlm_cb_set_arg *arg = opaq;
1848 struct ldlm_glimpse_work *gl_work;
1849 struct ldlm_lock *lock;
1853 if (list_empty(arg->list))
1856 gl_work = list_entry(arg->list->next, struct ldlm_glimpse_work,
1858 list_del_init(&gl_work->gl_list);
1860 lock = gl_work->gl_lock;
1862 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1863 arg->gl_desc = gl_work->gl_desc;
1865 /* invoke the actual glimpse callback */
1866 if (lock->l_glimpse_ast(lock, (void*)arg) == 0)
1869 LDLM_LOCK_RELEASE(lock);
1871 if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
1872 OBD_FREE_PTR(gl_work);
1878 * Process list of locks in need of ASTs being sent.
1880 * Used on server to send multiple ASTs together instead of sending one by
1883 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
1884 ldlm_desc_ast_t ast_type)
1886 struct ldlm_cb_set_arg *arg;
1887 set_producer_func work_ast_lock;
1890 if (list_empty(rpc_list))
1897 atomic_set(&arg->restart, 0);
1898 arg->list = rpc_list;
1901 case LDLM_WORK_BL_AST:
1902 arg->type = LDLM_BL_CALLBACK;
1903 work_ast_lock = ldlm_work_bl_ast_lock;
1905 case LDLM_WORK_CP_AST:
1906 arg->type = LDLM_CP_CALLBACK;
1907 work_ast_lock = ldlm_work_cp_ast_lock;
1909 case LDLM_WORK_REVOKE_AST:
1910 arg->type = LDLM_BL_CALLBACK;
1911 work_ast_lock = ldlm_work_revoke_ast_lock;
1913 case LDLM_WORK_GL_AST:
1914 arg->type = LDLM_GL_CALLBACK;
1915 work_ast_lock = ldlm_work_gl_ast_lock;
1921 /* We create a ptlrpc request set with flow control extension.
1922 * This request set will use the work_ast_lock function to produce new
1923 * requests and will send a new request each time one completes in order
1924 * to keep the number of requests in flight to ns_max_parallel_ast */
1925 arg->set = ptlrpc_prep_fcset(ns->ns_max_parallel_ast ? : UINT_MAX,
1926 work_ast_lock, arg);
1927 if (arg->set == NULL)
1928 GOTO(out, rc = -ENOMEM);
1930 ptlrpc_set_wait(arg->set);
1931 ptlrpc_set_destroy(arg->set);
1933 rc = atomic_read(&arg->restart) ? -ERESTART : 0;
1940 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
1942 ldlm_reprocess_all(res);
1943 return LDLM_ITER_CONTINUE;
1946 static int ldlm_reprocess_res(cfs_hash_t *hs, cfs_hash_bd_t *bd,
1947 struct hlist_node *hnode, void *arg)
1949 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1952 rc = reprocess_one_queue(res, arg);
1954 return rc == LDLM_ITER_STOP;
1958 * Iterate through all resources on a namespace attempting to grant waiting
1961 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
1966 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1967 ldlm_reprocess_res, NULL);
1971 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1974 * Try to grant all waiting locks on a resource.
1976 * Calls ldlm_reprocess_queue on converting and waiting queues.
1978 * Typically called after some resource locks are cancelled to see
1979 * if anything could be granted as a result of the cancellation.
1981 void ldlm_reprocess_all(struct ldlm_resource *res)
1983 LIST_HEAD(rpc_list);
1986 if (!ns_is_client(ldlm_res_to_ns(res))) {
1987 CERROR("This is client-side-only module, cannot handle "
1988 "LDLM_NAMESPACE_SERVER resource type lock.\n");
1995 * Helper function to call blocking AST for LDLM lock \a lock in a
1996 * "cancelling" mode.
1998 void ldlm_cancel_callback(struct ldlm_lock *lock)
2000 check_res_locked(lock->l_resource);
2001 if (!(lock->l_flags & LDLM_FL_CANCEL)) {
2002 lock->l_flags |= LDLM_FL_CANCEL;
2003 if (lock->l_blocking_ast) {
2004 unlock_res_and_lock(lock);
2005 lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
2007 lock_res_and_lock(lock);
2009 LDLM_DEBUG(lock, "no blocking ast");
2012 lock->l_flags |= LDLM_FL_BL_DONE;
2016 * Remove skiplist-enabled LDLM lock \a req from granted list
2018 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req)
2020 if (req->l_resource->lr_type != LDLM_PLAIN &&
2021 req->l_resource->lr_type != LDLM_IBITS)
2024 list_del_init(&req->l_sl_policy);
2025 list_del_init(&req->l_sl_mode);
2029 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
2031 void ldlm_lock_cancel(struct ldlm_lock *lock)
2033 struct ldlm_resource *res;
2034 struct ldlm_namespace *ns;
2037 lock_res_and_lock(lock);
2039 res = lock->l_resource;
2040 ns = ldlm_res_to_ns(res);
2042 /* Please do not, no matter how tempting, remove this LBUG without
2043 * talking to me first. -phik */
2044 if (lock->l_readers || lock->l_writers) {
2045 LDLM_ERROR(lock, "lock still has references");
2050 ldlm_del_waiting_lock(lock);
2052 /* Releases cancel callback. */
2053 ldlm_cancel_callback(lock);
2055 /* Yes, second time, just in case it was added again while we were
2056 running with no res lock in ldlm_cancel_callback */
2058 ldlm_del_waiting_lock(lock);
2060 ldlm_resource_unlink_lock(lock);
2061 ldlm_lock_destroy_nolock(lock);
2063 if (lock->l_granted_mode == lock->l_req_mode)
2064 ldlm_pool_del(&ns->ns_pool, lock);
2066 /* Make sure we will not be called again for same lock what is possible
2067 * if not to zero out lock->l_granted_mode */
2068 lock->l_granted_mode = LCK_MINMODE;
2069 unlock_res_and_lock(lock);
2073 EXPORT_SYMBOL(ldlm_lock_cancel);
2076 * Set opaque data into the lock that only makes sense to upper layer.
2078 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
2080 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2085 if (lock->l_ast_data == NULL)
2086 lock->l_ast_data = data;
2087 if (lock->l_ast_data == data)
2089 LDLM_LOCK_PUT(lock);
2093 EXPORT_SYMBOL(ldlm_lock_set_data);
2095 struct export_cl_data {
2096 struct obd_export *ecl_exp;
2101 * Iterator function for ldlm_cancel_locks_for_export.
2102 * Cancels passed locks.
2104 int ldlm_cancel_locks_for_export_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
2105 struct hlist_node *hnode, void *data)
2108 struct export_cl_data *ecl = (struct export_cl_data *)data;
2109 struct obd_export *exp = ecl->ecl_exp;
2110 struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
2111 struct ldlm_resource *res;
2113 res = ldlm_resource_getref(lock->l_resource);
2114 LDLM_LOCK_GET(lock);
2116 LDLM_DEBUG(lock, "export %p", exp);
2117 ldlm_res_lvbo_update(res, NULL, 1);
2118 ldlm_lock_cancel(lock);
2119 ldlm_reprocess_all(res);
2120 ldlm_resource_putref(res);
2121 LDLM_LOCK_RELEASE(lock);
2124 if ((ecl->ecl_loop & -ecl->ecl_loop) == ecl->ecl_loop) {
2126 "Cancel lock %p for export %p (loop %d), still have "
2127 "%d locks left on hash table.\n",
2128 lock, exp, ecl->ecl_loop,
2129 atomic_read(&hs->hs_count));
2136 * Cancel all locks for given export.
2138 * Typically called on client disconnection/eviction
2140 void ldlm_cancel_locks_for_export(struct obd_export *exp)
2142 struct export_cl_data ecl = {
2147 cfs_hash_for_each_empty(exp->exp_lock_hash,
2148 ldlm_cancel_locks_for_export_cb, &ecl);
2152 * Downgrade an exclusive lock.
2154 * A fast variant of ldlm_lock_convert for convertion of exclusive
2155 * locks. The convertion is always successful.
2156 * Used by Commit on Sharing (COS) code.
2158 * \param lock A lock to convert
2159 * \param new_mode new lock mode
2161 void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
2165 LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
2166 LASSERT(new_mode == LCK_COS);
2168 lock_res_and_lock(lock);
2169 ldlm_resource_unlink_lock(lock);
2171 * Remove the lock from pool as it will be added again in
2172 * ldlm_grant_lock() called below.
2174 ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
2176 lock->l_req_mode = new_mode;
2177 ldlm_grant_lock(lock, NULL);
2178 unlock_res_and_lock(lock);
2179 ldlm_reprocess_all(lock->l_resource);
2183 EXPORT_SYMBOL(ldlm_lock_downgrade);
2186 * Attempt to convert already granted lock to a different mode.
2188 * While lock conversion is not currently used, future client-side
2189 * optimizations could take advantage of it to avoid discarding cached
2192 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
2195 LIST_HEAD(rpc_list);
2196 struct ldlm_resource *res;
2197 struct ldlm_namespace *ns;
2199 struct ldlm_interval *node;
2202 /* Just return if mode is unchanged. */
2203 if (new_mode == lock->l_granted_mode) {
2204 *flags |= LDLM_FL_BLOCK_GRANTED;
2205 RETURN(lock->l_resource);
2208 /* I can't check the type of lock here because the bitlock of lock
2209 * is not held here, so do the allocation blindly. -jay */
2210 OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, __GFP_IO);
2211 if (node == NULL) /* Actually, this causes EDEADLOCK to be returned */
2214 LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
2215 "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
2217 lock_res_and_lock(lock);
2219 res = lock->l_resource;
2220 ns = ldlm_res_to_ns(res);
2222 lock->l_req_mode = new_mode;
2223 if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
2224 ldlm_resource_unlink_lock(lock);
2226 ldlm_resource_unlink_lock(lock);
2227 if (res->lr_type == LDLM_EXTENT) {
2228 /* FIXME: ugly code, I have to attach the lock to a
2229 * interval node again since perhaps it will be granted
2231 INIT_LIST_HEAD(&node->li_group);
2232 ldlm_interval_attach(node, lock);
2238 * Remove old lock from the pool before adding the lock with new
2239 * mode below in ->policy()
2241 ldlm_pool_del(&ns->ns_pool, lock);
2243 /* If this is a local resource, put it on the appropriate list. */
2244 if (ns_is_client(ldlm_res_to_ns(res))) {
2245 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
2246 ldlm_resource_add_lock(res, &res->lr_converting, lock);
2248 /* This should never happen, because of the way the
2249 * server handles conversions. */
2250 LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
2254 ldlm_grant_lock(lock, &rpc_list);
2256 /* FIXME: completion handling not with lr_lock held ! */
2257 if (lock->l_completion_ast)
2258 lock->l_completion_ast(lock, 0, NULL);
2261 CERROR("This is client-side-only module, cannot handle "
2262 "LDLM_NAMESPACE_SERVER resource type lock.\n");
2265 unlock_res_and_lock(lock);
2268 ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
2270 OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
2273 EXPORT_SYMBOL(ldlm_lock_convert);
2276 * Print lock with lock handle \a lockh description into debug log.
2278 * Used when printing all locks on a resource for debug purposes.
2280 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
2282 struct ldlm_lock *lock;
2284 if (!((libcfs_debug | D_ERROR) & level))
2287 lock = ldlm_handle2lock(lockh);
2291 LDLM_DEBUG_LIMIT(level, lock, "###");
2293 LDLM_LOCK_PUT(lock);
2295 EXPORT_SYMBOL(ldlm_lock_dump_handle);
2298 * Print lock information with custom message into debug log.
2301 void _ldlm_lock_debug(struct ldlm_lock *lock,
2302 struct libcfs_debug_msg_data *msgdata,
2303 const char *fmt, ...)
2306 struct obd_export *exp = lock->l_export;
2307 struct ldlm_resource *resource = lock->l_resource;
2308 char *nid = "local";
2310 va_start(args, fmt);
2312 if (exp && exp->exp_connection) {
2313 nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
2314 } else if (exp && exp->exp_obd != NULL) {
2315 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
2316 nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
2319 if (resource == NULL) {
2320 libcfs_debug_vmsg2(msgdata, fmt, args,
2321 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2322 "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" nid: %s "
2323 "remote: "LPX64" expref: %d pid: %u timeout: %lu "
2326 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2327 lock->l_readers, lock->l_writers,
2328 ldlm_lockname[lock->l_granted_mode],
2329 ldlm_lockname[lock->l_req_mode],
2330 lock->l_flags, nid, lock->l_remote_handle.cookie,
2331 exp ? atomic_read(&exp->exp_refcount) : -99,
2332 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2337 switch (resource->lr_type) {
2339 libcfs_debug_vmsg2(msgdata, fmt, args,
2340 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2341 "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64
2342 "] (req "LPU64"->"LPU64") flags: "LPX64" nid: %s remote:"
2343 " "LPX64" expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2344 ldlm_lock_to_ns_name(lock), lock,
2345 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2346 lock->l_readers, lock->l_writers,
2347 ldlm_lockname[lock->l_granted_mode],
2348 ldlm_lockname[lock->l_req_mode],
2349 resource->lr_name.name[0],
2350 resource->lr_name.name[1],
2351 atomic_read(&resource->lr_refcount),
2352 ldlm_typename[resource->lr_type],
2353 lock->l_policy_data.l_extent.start,
2354 lock->l_policy_data.l_extent.end,
2355 lock->l_req_extent.start, lock->l_req_extent.end,
2356 lock->l_flags, nid, lock->l_remote_handle.cookie,
2357 exp ? atomic_read(&exp->exp_refcount) : -99,
2358 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2362 libcfs_debug_vmsg2(msgdata, fmt, args,
2363 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2364 "res: "LPU64"/"LPU64" rrc: %d type: %s pid: %d "
2365 "["LPU64"->"LPU64"] flags: "LPX64" nid: %s remote: "LPX64
2366 " expref: %d pid: %u timeout: %lu\n",
2367 ldlm_lock_to_ns_name(lock), lock,
2368 lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
2369 lock->l_readers, lock->l_writers,
2370 ldlm_lockname[lock->l_granted_mode],
2371 ldlm_lockname[lock->l_req_mode],
2372 resource->lr_name.name[0],
2373 resource->lr_name.name[1],
2374 atomic_read(&resource->lr_refcount),
2375 ldlm_typename[resource->lr_type],
2376 lock->l_policy_data.l_flock.pid,
2377 lock->l_policy_data.l_flock.start,
2378 lock->l_policy_data.l_flock.end,
2379 lock->l_flags, nid, lock->l_remote_handle.cookie,
2380 exp ? atomic_read(&exp->exp_refcount) : -99,
2381 lock->l_pid, lock->l_callback_timeout);
2385 libcfs_debug_vmsg2(msgdata, fmt, args,
2386 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2387 "res: "LPU64"/"LPU64" bits "LPX64" rrc: %d type: %s "
2388 "flags: "LPX64" nid: %s remote: "LPX64" expref: %d "
2389 "pid: %u timeout: %lu lvb_type: %d\n",
2390 ldlm_lock_to_ns_name(lock),
2391 lock, lock->l_handle.h_cookie,
2392 atomic_read (&lock->l_refc),
2393 lock->l_readers, lock->l_writers,
2394 ldlm_lockname[lock->l_granted_mode],
2395 ldlm_lockname[lock->l_req_mode],
2396 resource->lr_name.name[0],
2397 resource->lr_name.name[1],
2398 lock->l_policy_data.l_inodebits.bits,
2399 atomic_read(&resource->lr_refcount),
2400 ldlm_typename[resource->lr_type],
2401 lock->l_flags, nid, lock->l_remote_handle.cookie,
2402 exp ? atomic_read(&exp->exp_refcount) : -99,
2403 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2407 libcfs_debug_vmsg2(msgdata, fmt, args,
2408 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
2409 "res: "LPU64"/"LPU64" rrc: %d type: %s flags: "LPX64" "
2410 "nid: %s remote: "LPX64" expref: %d pid: %u timeout: %lu"
2412 ldlm_lock_to_ns_name(lock),
2413 lock, lock->l_handle.h_cookie,
2414 atomic_read (&lock->l_refc),
2415 lock->l_readers, lock->l_writers,
2416 ldlm_lockname[lock->l_granted_mode],
2417 ldlm_lockname[lock->l_req_mode],
2418 resource->lr_name.name[0],
2419 resource->lr_name.name[1],
2420 atomic_read(&resource->lr_refcount),
2421 ldlm_typename[resource->lr_type],
2422 lock->l_flags, nid, lock->l_remote_handle.cookie,
2423 exp ? atomic_read(&exp->exp_refcount) : -99,
2424 lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
2429 EXPORT_SYMBOL(_ldlm_lock_debug);