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 "../../include/linux/libcfs/libcfs.h"
45 #include "../include/lustre_intent.h"
46 #include "../include/obd_class.h"
47 #include "ldlm_internal.h"
50 char *ldlm_lockname
[] = {
58 [LCK_GROUP
] = "GROUP",
61 EXPORT_SYMBOL(ldlm_lockname
);
63 char *ldlm_typename
[] = {
65 [LDLM_EXTENT
] = "EXT",
69 EXPORT_SYMBOL(ldlm_typename
);
71 static ldlm_policy_wire_to_local_t ldlm_policy_wire18_to_local
[] = {
72 [LDLM_PLAIN
- LDLM_MIN_TYPE
] = ldlm_plain_policy_wire_to_local
,
73 [LDLM_EXTENT
- LDLM_MIN_TYPE
] = ldlm_extent_policy_wire_to_local
,
74 [LDLM_FLOCK
- LDLM_MIN_TYPE
] = ldlm_flock_policy_wire18_to_local
,
75 [LDLM_IBITS
- LDLM_MIN_TYPE
] = ldlm_ibits_policy_wire_to_local
,
78 static ldlm_policy_wire_to_local_t ldlm_policy_wire21_to_local
[] = {
79 [LDLM_PLAIN
- LDLM_MIN_TYPE
] = ldlm_plain_policy_wire_to_local
,
80 [LDLM_EXTENT
- LDLM_MIN_TYPE
] = ldlm_extent_policy_wire_to_local
,
81 [LDLM_FLOCK
- LDLM_MIN_TYPE
] = ldlm_flock_policy_wire21_to_local
,
82 [LDLM_IBITS
- LDLM_MIN_TYPE
] = ldlm_ibits_policy_wire_to_local
,
85 static ldlm_policy_local_to_wire_t ldlm_policy_local_to_wire
[] = {
86 [LDLM_PLAIN
- LDLM_MIN_TYPE
] = ldlm_plain_policy_local_to_wire
,
87 [LDLM_EXTENT
- LDLM_MIN_TYPE
] = ldlm_extent_policy_local_to_wire
,
88 [LDLM_FLOCK
- LDLM_MIN_TYPE
] = ldlm_flock_policy_local_to_wire
,
89 [LDLM_IBITS
- LDLM_MIN_TYPE
] = ldlm_ibits_policy_local_to_wire
,
93 * Converts lock policy from local format to on the wire lock_desc format
95 void ldlm_convert_policy_to_wire(ldlm_type_t type
,
96 const ldlm_policy_data_t
*lpolicy
,
97 ldlm_wire_policy_data_t
*wpolicy
)
99 ldlm_policy_local_to_wire_t convert
;
101 convert
= ldlm_policy_local_to_wire
[type
- LDLM_MIN_TYPE
];
103 convert(lpolicy
, wpolicy
);
107 * Converts lock policy from on the wire lock_desc format to local format
109 void ldlm_convert_policy_to_local(struct obd_export
*exp
, ldlm_type_t type
,
110 const ldlm_wire_policy_data_t
*wpolicy
,
111 ldlm_policy_data_t
*lpolicy
)
113 ldlm_policy_wire_to_local_t convert
;
116 /** some badness for 2.0.0 clients, but 2.0.0 isn't supported */
117 new_client
= (exp_connect_flags(exp
) & OBD_CONNECT_FULL20
) != 0;
119 convert
= ldlm_policy_wire21_to_local
[type
- LDLM_MIN_TYPE
];
121 convert
= ldlm_policy_wire18_to_local
[type
- LDLM_MIN_TYPE
];
123 convert(wpolicy
, lpolicy
);
126 char *ldlm_it2str(int it
)
133 case (IT_OPEN
| IT_CREAT
):
148 CERROR("Unknown intent %d\n", it
);
152 EXPORT_SYMBOL(ldlm_it2str
);
155 void ldlm_register_intent(struct ldlm_namespace
*ns
, ldlm_res_policy arg
)
159 EXPORT_SYMBOL(ldlm_register_intent
);
162 * REFCOUNTED LOCK OBJECTS
167 * Get a reference on a lock.
169 * Lock refcounts, during creation:
170 * - one special one for allocation, dec'd only once in destroy
171 * - one for being a lock that's in-use
172 * - one for the addref associated with a new lock
174 struct ldlm_lock
*ldlm_lock_get(struct ldlm_lock
*lock
)
176 atomic_inc(&lock
->l_refc
);
179 EXPORT_SYMBOL(ldlm_lock_get
);
182 * Release lock reference.
184 * Also frees the lock if it was last reference.
186 void ldlm_lock_put(struct ldlm_lock
*lock
)
188 LASSERT(lock
->l_resource
!= LP_POISON
);
189 LASSERT(atomic_read(&lock
->l_refc
) > 0);
190 if (atomic_dec_and_test(&lock
->l_refc
)) {
191 struct ldlm_resource
*res
;
194 "final lock_put on destroyed lock, freeing it.");
196 res
= lock
->l_resource
;
197 LASSERT(lock
->l_flags
& LDLM_FL_DESTROYED
);
198 LASSERT(list_empty(&lock
->l_res_link
));
199 LASSERT(list_empty(&lock
->l_pending_chain
));
201 lprocfs_counter_decr(ldlm_res_to_ns(res
)->ns_stats
,
203 lu_ref_del(&res
->lr_reference
, "lock", lock
);
204 ldlm_resource_putref(res
);
205 lock
->l_resource
= NULL
;
206 if (lock
->l_export
) {
207 class_export_lock_put(lock
->l_export
, lock
);
208 lock
->l_export
= NULL
;
211 kfree(lock
->l_lvb_data
);
213 ldlm_interval_free(ldlm_interval_detach(lock
));
214 lu_ref_fini(&lock
->l_reference
);
215 OBD_FREE_RCU(lock
, sizeof(*lock
), &lock
->l_handle
);
218 EXPORT_SYMBOL(ldlm_lock_put
);
221 * Removes LDLM lock \a lock from LRU. Assumes LRU is already locked.
223 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock
*lock
)
227 if (!list_empty(&lock
->l_lru
)) {
228 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
230 LASSERT(lock
->l_resource
->lr_type
!= LDLM_FLOCK
);
231 list_del_init(&lock
->l_lru
);
232 LASSERT(ns
->ns_nr_unused
> 0);
240 * Removes LDLM lock \a lock from LRU. Obtains the LRU lock first.
242 int ldlm_lock_remove_from_lru(struct ldlm_lock
*lock
)
244 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
247 if (lock
->l_flags
& LDLM_FL_NS_SRV
) {
248 LASSERT(list_empty(&lock
->l_lru
));
252 spin_lock(&ns
->ns_lock
);
253 rc
= ldlm_lock_remove_from_lru_nolock(lock
);
254 spin_unlock(&ns
->ns_lock
);
259 * Adds LDLM lock \a lock to namespace LRU. Assumes LRU is already locked.
261 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock
*lock
)
263 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
265 lock
->l_last_used
= cfs_time_current();
266 LASSERT(list_empty(&lock
->l_lru
));
267 LASSERT(lock
->l_resource
->lr_type
!= LDLM_FLOCK
);
268 list_add_tail(&lock
->l_lru
, &ns
->ns_unused_list
);
269 if (lock
->l_flags
& LDLM_FL_SKIPPED
)
270 lock
->l_flags
&= ~LDLM_FL_SKIPPED
;
271 LASSERT(ns
->ns_nr_unused
>= 0);
276 * Adds LDLM lock \a lock to namespace LRU. Obtains necessary LRU locks
279 void ldlm_lock_add_to_lru(struct ldlm_lock
*lock
)
281 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
283 spin_lock(&ns
->ns_lock
);
284 ldlm_lock_add_to_lru_nolock(lock
);
285 spin_unlock(&ns
->ns_lock
);
289 * Moves LDLM lock \a lock that is already in namespace LRU to the tail of
290 * the LRU. Performs necessary LRU locking
292 void ldlm_lock_touch_in_lru(struct ldlm_lock
*lock
)
294 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
296 if (lock
->l_flags
& LDLM_FL_NS_SRV
) {
297 LASSERT(list_empty(&lock
->l_lru
));
301 spin_lock(&ns
->ns_lock
);
302 if (!list_empty(&lock
->l_lru
)) {
303 ldlm_lock_remove_from_lru_nolock(lock
);
304 ldlm_lock_add_to_lru_nolock(lock
);
306 spin_unlock(&ns
->ns_lock
);
310 * Helper to destroy a locked lock.
312 * Used by ldlm_lock_destroy and ldlm_lock_destroy_nolock
313 * Must be called with l_lock and lr_lock held.
315 * Does not actually free the lock data, but rather marks the lock as
316 * destroyed by setting l_destroyed field in the lock to 1. Destroys a
317 * handle->lock association too, so that the lock can no longer be found
318 * and removes the lock from LRU list. Actual lock freeing occurs when
319 * last lock reference goes away.
321 * Original comment (of some historical value):
322 * This used to have a 'strict' flag, which recovery would use to mark an
323 * in-use lock as needing-to-die. Lest I am ever tempted to put it back, I
324 * shall explain why it's gone: with the new hash table scheme, once you call
325 * ldlm_lock_destroy, you can never drop your final references on this lock.
326 * Because it's not in the hash table anymore. -phil
328 int ldlm_lock_destroy_internal(struct ldlm_lock
*lock
)
330 if (lock
->l_readers
|| lock
->l_writers
) {
331 LDLM_ERROR(lock
, "lock still has references");
335 if (!list_empty(&lock
->l_res_link
)) {
336 LDLM_ERROR(lock
, "lock still on resource");
340 if (lock
->l_flags
& LDLM_FL_DESTROYED
) {
341 LASSERT(list_empty(&lock
->l_lru
));
344 lock
->l_flags
|= LDLM_FL_DESTROYED
;
346 if (lock
->l_export
&& lock
->l_export
->exp_lock_hash
) {
347 /* NB: it's safe to call cfs_hash_del() even lock isn't
348 * in exp_lock_hash. */
349 /* In the function below, .hs_keycmp resolves to
350 * ldlm_export_lock_keycmp() */
351 /* coverity[overrun-buffer-val] */
352 cfs_hash_del(lock
->l_export
->exp_lock_hash
,
353 &lock
->l_remote_handle
, &lock
->l_exp_hash
);
356 ldlm_lock_remove_from_lru(lock
);
357 class_handle_unhash(&lock
->l_handle
);
360 /* Wake anyone waiting for this lock */
361 /* FIXME: I should probably add yet another flag, instead of using
362 * l_export to only call this on clients */
364 class_export_put(lock
->l_export
);
365 lock
->l_export
= NULL
;
366 if (lock
->l_export
&& lock
->l_completion_ast
)
367 lock
->l_completion_ast(lock
, 0);
373 * Destroys a LDLM lock \a lock. Performs necessary locking first.
375 void ldlm_lock_destroy(struct ldlm_lock
*lock
)
379 lock_res_and_lock(lock
);
380 first
= ldlm_lock_destroy_internal(lock
);
381 unlock_res_and_lock(lock
);
383 /* drop reference from hashtable only for first destroy */
385 lu_ref_del(&lock
->l_reference
, "hash", lock
);
386 LDLM_LOCK_RELEASE(lock
);
391 * Destroys a LDLM lock \a lock that is already locked.
393 void ldlm_lock_destroy_nolock(struct ldlm_lock
*lock
)
397 first
= ldlm_lock_destroy_internal(lock
);
398 /* drop reference from hashtable only for first destroy */
400 lu_ref_del(&lock
->l_reference
, "hash", lock
);
401 LDLM_LOCK_RELEASE(lock
);
405 /* this is called by portals_handle2object with the handle lock taken */
406 static void lock_handle_addref(void *lock
)
408 LDLM_LOCK_GET((struct ldlm_lock
*)lock
);
411 static void lock_handle_free(void *lock
, int size
)
413 LASSERT(size
== sizeof(struct ldlm_lock
));
414 OBD_SLAB_FREE(lock
, ldlm_lock_slab
, size
);
417 struct portals_handle_ops lock_handle_ops
= {
418 .hop_addref
= lock_handle_addref
,
419 .hop_free
= lock_handle_free
,
424 * Allocate and initialize new lock structure.
426 * usage: pass in a resource on which you have done ldlm_resource_get
427 * new lock will take over the refcount.
428 * returns: lock with refcount 2 - one for current caller and one for remote
430 static struct ldlm_lock
*ldlm_lock_new(struct ldlm_resource
*resource
)
432 struct ldlm_lock
*lock
;
434 if (resource
== NULL
)
437 OBD_SLAB_ALLOC_PTR_GFP(lock
, ldlm_lock_slab
, GFP_NOFS
);
441 spin_lock_init(&lock
->l_lock
);
442 lock
->l_resource
= resource
;
443 lu_ref_add(&resource
->lr_reference
, "lock", lock
);
445 atomic_set(&lock
->l_refc
, 2);
446 INIT_LIST_HEAD(&lock
->l_res_link
);
447 INIT_LIST_HEAD(&lock
->l_lru
);
448 INIT_LIST_HEAD(&lock
->l_pending_chain
);
449 INIT_LIST_HEAD(&lock
->l_bl_ast
);
450 INIT_LIST_HEAD(&lock
->l_cp_ast
);
451 INIT_LIST_HEAD(&lock
->l_rk_ast
);
452 init_waitqueue_head(&lock
->l_waitq
);
453 lock
->l_blocking_lock
= NULL
;
454 INIT_LIST_HEAD(&lock
->l_sl_mode
);
455 INIT_LIST_HEAD(&lock
->l_sl_policy
);
456 INIT_HLIST_NODE(&lock
->l_exp_hash
);
457 INIT_HLIST_NODE(&lock
->l_exp_flock_hash
);
459 lprocfs_counter_incr(ldlm_res_to_ns(resource
)->ns_stats
,
461 INIT_LIST_HEAD(&lock
->l_handle
.h_link
);
462 class_handle_hash(&lock
->l_handle
, &lock_handle_ops
);
464 lu_ref_init(&lock
->l_reference
);
465 lu_ref_add(&lock
->l_reference
, "hash", lock
);
466 lock
->l_callback_timeout
= 0;
468 #if LUSTRE_TRACKS_LOCK_EXP_REFS
469 INIT_LIST_HEAD(&lock
->l_exp_refs_link
);
470 lock
->l_exp_refs_nr
= 0;
471 lock
->l_exp_refs_target
= NULL
;
473 INIT_LIST_HEAD(&lock
->l_exp_list
);
479 * Moves LDLM lock \a lock to another resource.
480 * This is used on client when server returns some other lock than requested
481 * (typically as a result of intent operation)
483 int ldlm_lock_change_resource(struct ldlm_namespace
*ns
, struct ldlm_lock
*lock
,
484 const struct ldlm_res_id
*new_resid
)
486 struct ldlm_resource
*oldres
= lock
->l_resource
;
487 struct ldlm_resource
*newres
;
490 LASSERT(ns_is_client(ns
));
492 lock_res_and_lock(lock
);
493 if (memcmp(new_resid
, &lock
->l_resource
->lr_name
,
494 sizeof(lock
->l_resource
->lr_name
)) == 0) {
496 unlock_res_and_lock(lock
);
500 LASSERT(new_resid
->name
[0] != 0);
502 /* This function assumes that the lock isn't on any lists */
503 LASSERT(list_empty(&lock
->l_res_link
));
505 type
= oldres
->lr_type
;
506 unlock_res_and_lock(lock
);
508 newres
= ldlm_resource_get(ns
, NULL
, new_resid
, type
, 1);
512 lu_ref_add(&newres
->lr_reference
, "lock", lock
);
514 * To flip the lock from the old to the new resource, lock, oldres and
515 * newres have to be locked. Resource spin-locks are nested within
516 * lock->l_lock, and are taken in the memory address order to avoid
519 spin_lock(&lock
->l_lock
);
520 oldres
= lock
->l_resource
;
521 if (oldres
< newres
) {
523 lock_res_nested(newres
, LRT_NEW
);
526 lock_res_nested(oldres
, LRT_NEW
);
528 LASSERT(memcmp(new_resid
, &oldres
->lr_name
,
529 sizeof(oldres
->lr_name
)) != 0);
530 lock
->l_resource
= newres
;
532 unlock_res_and_lock(lock
);
534 /* ...and the flowers are still standing! */
535 lu_ref_del(&oldres
->lr_reference
, "lock", lock
);
536 ldlm_resource_putref(oldres
);
540 EXPORT_SYMBOL(ldlm_lock_change_resource
);
542 /** \defgroup ldlm_handles LDLM HANDLES
543 * Ways to get hold of locks without any addresses.
548 * Fills in handle for LDLM lock \a lock into supplied \a lockh
549 * Does not take any references.
551 void ldlm_lock2handle(const struct ldlm_lock
*lock
, struct lustre_handle
*lockh
)
553 lockh
->cookie
= lock
->l_handle
.h_cookie
;
555 EXPORT_SYMBOL(ldlm_lock2handle
);
558 * Obtain a lock reference by handle.
560 * if \a flags: atomically get the lock and set the flags.
561 * Return NULL if flag already set
563 struct ldlm_lock
*__ldlm_handle2lock(const struct lustre_handle
*handle
,
566 struct ldlm_lock
*lock
;
570 lock
= class_handle2object(handle
->cookie
);
574 /* It's unlikely but possible that someone marked the lock as
575 * destroyed after we did handle2object on it */
576 if (flags
== 0 && ((lock
->l_flags
& LDLM_FL_DESTROYED
) == 0)) {
577 lu_ref_add(&lock
->l_reference
, "handle", current
);
581 lock_res_and_lock(lock
);
583 LASSERT(lock
->l_resource
!= NULL
);
585 lu_ref_add_atomic(&lock
->l_reference
, "handle", current
);
586 if (unlikely(lock
->l_flags
& LDLM_FL_DESTROYED
)) {
587 unlock_res_and_lock(lock
);
588 CDEBUG(D_INFO
, "lock already destroyed: lock %p\n", lock
);
593 if (flags
&& (lock
->l_flags
& flags
)) {
594 unlock_res_and_lock(lock
);
600 lock
->l_flags
|= flags
;
602 unlock_res_and_lock(lock
);
605 EXPORT_SYMBOL(__ldlm_handle2lock
);
606 /** @} ldlm_handles */
609 * Fill in "on the wire" representation for given LDLM lock into supplied
610 * lock descriptor \a desc structure.
612 void ldlm_lock2desc(struct ldlm_lock
*lock
, struct ldlm_lock_desc
*desc
)
614 ldlm_res2desc(lock
->l_resource
, &desc
->l_resource
);
615 desc
->l_req_mode
= lock
->l_req_mode
;
616 desc
->l_granted_mode
= lock
->l_granted_mode
;
617 ldlm_convert_policy_to_wire(lock
->l_resource
->lr_type
,
618 &lock
->l_policy_data
,
619 &desc
->l_policy_data
);
621 EXPORT_SYMBOL(ldlm_lock2desc
);
624 * Add a lock to list of conflicting locks to send AST to.
626 * Only add if we have not sent a blocking AST to the lock yet.
628 void ldlm_add_bl_work_item(struct ldlm_lock
*lock
, struct ldlm_lock
*new,
629 struct list_head
*work_list
)
631 if ((lock
->l_flags
& LDLM_FL_AST_SENT
) == 0) {
632 LDLM_DEBUG(lock
, "lock incompatible; sending blocking AST.");
633 lock
->l_flags
|= LDLM_FL_AST_SENT
;
634 /* If the enqueuing client said so, tell the AST recipient to
635 * discard dirty data, rather than writing back. */
636 if (new->l_flags
& LDLM_FL_AST_DISCARD_DATA
)
637 lock
->l_flags
|= LDLM_FL_DISCARD_DATA
;
638 LASSERT(list_empty(&lock
->l_bl_ast
));
639 list_add(&lock
->l_bl_ast
, work_list
);
641 LASSERT(lock
->l_blocking_lock
== NULL
);
642 lock
->l_blocking_lock
= LDLM_LOCK_GET(new);
647 * Add a lock to list of just granted locks to send completion AST to.
649 void ldlm_add_cp_work_item(struct ldlm_lock
*lock
, struct list_head
*work_list
)
651 if ((lock
->l_flags
& LDLM_FL_CP_REQD
) == 0) {
652 lock
->l_flags
|= LDLM_FL_CP_REQD
;
653 LDLM_DEBUG(lock
, "lock granted; sending completion AST.");
654 LASSERT(list_empty(&lock
->l_cp_ast
));
655 list_add(&lock
->l_cp_ast
, work_list
);
661 * Aggregator function to add AST work items into a list. Determines
662 * what sort of an AST work needs to be done and calls the proper
664 * Must be called with lr_lock held.
666 void ldlm_add_ast_work_item(struct ldlm_lock
*lock
, struct ldlm_lock
*new,
667 struct list_head
*work_list
)
669 check_res_locked(lock
->l_resource
);
671 ldlm_add_bl_work_item(lock
, new, work_list
);
673 ldlm_add_cp_work_item(lock
, work_list
);
677 * Add specified reader/writer reference to LDLM lock with handle \a lockh.
678 * r/w reference type is determined by \a mode
679 * Calls ldlm_lock_addref_internal.
681 void ldlm_lock_addref(struct lustre_handle
*lockh
, __u32 mode
)
683 struct ldlm_lock
*lock
;
685 lock
= ldlm_handle2lock(lockh
);
686 LASSERT(lock
!= NULL
);
687 ldlm_lock_addref_internal(lock
, mode
);
690 EXPORT_SYMBOL(ldlm_lock_addref
);
694 * Add specified reader/writer reference to LDLM lock \a lock.
695 * r/w reference type is determined by \a mode
696 * Removes lock from LRU if it is there.
697 * Assumes the LDLM lock is already locked.
699 void ldlm_lock_addref_internal_nolock(struct ldlm_lock
*lock
, __u32 mode
)
701 ldlm_lock_remove_from_lru(lock
);
702 if (mode
& (LCK_NL
| LCK_CR
| LCK_PR
)) {
704 lu_ref_add_atomic(&lock
->l_reference
, "reader", lock
);
706 if (mode
& (LCK_EX
| LCK_CW
| LCK_PW
| LCK_GROUP
| LCK_COS
)) {
708 lu_ref_add_atomic(&lock
->l_reference
, "writer", lock
);
711 lu_ref_add_atomic(&lock
->l_reference
, "user", lock
);
712 LDLM_DEBUG(lock
, "ldlm_lock_addref(%s)", ldlm_lockname
[mode
]);
716 * Attempts to add reader/writer reference to a lock with handle \a lockh, and
717 * fails if lock is already LDLM_FL_CBPENDING or destroyed.
719 * \retval 0 success, lock was addref-ed
721 * \retval -EAGAIN lock is being canceled.
723 int ldlm_lock_addref_try(struct lustre_handle
*lockh
, __u32 mode
)
725 struct ldlm_lock
*lock
;
729 lock
= ldlm_handle2lock(lockh
);
731 lock_res_and_lock(lock
);
732 if (lock
->l_readers
!= 0 || lock
->l_writers
!= 0 ||
733 !(lock
->l_flags
& LDLM_FL_CBPENDING
)) {
734 ldlm_lock_addref_internal_nolock(lock
, mode
);
737 unlock_res_and_lock(lock
);
742 EXPORT_SYMBOL(ldlm_lock_addref_try
);
745 * Add specified reader/writer reference to LDLM lock \a lock.
746 * Locks LDLM lock and calls ldlm_lock_addref_internal_nolock to do the work.
747 * Only called for local locks.
749 void ldlm_lock_addref_internal(struct ldlm_lock
*lock
, __u32 mode
)
751 lock_res_and_lock(lock
);
752 ldlm_lock_addref_internal_nolock(lock
, mode
);
753 unlock_res_and_lock(lock
);
757 * Removes reader/writer reference for LDLM lock \a lock.
758 * Assumes LDLM lock is already locked.
759 * only called in ldlm_flock_destroy and for local locks.
760 * Does NOT add lock to LRU if no r/w references left to accommodate flock locks
761 * that cannot be placed in LRU.
763 void ldlm_lock_decref_internal_nolock(struct ldlm_lock
*lock
, __u32 mode
)
765 LDLM_DEBUG(lock
, "ldlm_lock_decref(%s)", ldlm_lockname
[mode
]);
766 if (mode
& (LCK_NL
| LCK_CR
| LCK_PR
)) {
767 LASSERT(lock
->l_readers
> 0);
768 lu_ref_del(&lock
->l_reference
, "reader", lock
);
771 if (mode
& (LCK_EX
| LCK_CW
| LCK_PW
| LCK_GROUP
| LCK_COS
)) {
772 LASSERT(lock
->l_writers
> 0);
773 lu_ref_del(&lock
->l_reference
, "writer", lock
);
777 lu_ref_del(&lock
->l_reference
, "user", lock
);
778 LDLM_LOCK_RELEASE(lock
); /* matches the LDLM_LOCK_GET() in addref */
782 * Removes reader/writer reference for LDLM lock \a lock.
783 * Locks LDLM lock first.
784 * If the lock is determined to be client lock on a client and r/w refcount
785 * drops to zero and the lock is not blocked, the lock is added to LRU lock
787 * For blocked LDLM locks if r/w count drops to zero, blocking_ast is called.
789 void ldlm_lock_decref_internal(struct ldlm_lock
*lock
, __u32 mode
)
791 struct ldlm_namespace
*ns
;
793 lock_res_and_lock(lock
);
795 ns
= ldlm_lock_to_ns(lock
);
797 ldlm_lock_decref_internal_nolock(lock
, mode
);
799 if (lock
->l_flags
& LDLM_FL_LOCAL
&&
800 !lock
->l_readers
&& !lock
->l_writers
) {
801 /* If this is a local lock on a server namespace and this was
802 * the last reference, cancel the lock. */
803 CDEBUG(D_INFO
, "forcing cancel of local lock\n");
804 lock
->l_flags
|= LDLM_FL_CBPENDING
;
807 if (!lock
->l_readers
&& !lock
->l_writers
&&
808 (lock
->l_flags
& LDLM_FL_CBPENDING
)) {
809 /* If we received a blocked AST and this was the last reference,
810 * run the callback. */
811 if ((lock
->l_flags
& LDLM_FL_NS_SRV
) && lock
->l_export
)
812 CERROR("FL_CBPENDING set on non-local lock--just a warning\n");
814 LDLM_DEBUG(lock
, "final decref done on cbpending lock");
816 LDLM_LOCK_GET(lock
); /* dropped by bl thread */
817 ldlm_lock_remove_from_lru(lock
);
818 unlock_res_and_lock(lock
);
820 if (lock
->l_flags
& LDLM_FL_FAIL_LOC
)
821 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE
);
823 if ((lock
->l_flags
& LDLM_FL_ATOMIC_CB
) ||
824 ldlm_bl_to_thread_lock(ns
, NULL
, lock
) != 0)
825 ldlm_handle_bl_callback(ns
, NULL
, lock
);
826 } else if (ns_is_client(ns
) &&
827 !lock
->l_readers
&& !lock
->l_writers
&&
828 !(lock
->l_flags
& LDLM_FL_NO_LRU
) &&
829 !(lock
->l_flags
& LDLM_FL_BL_AST
)) {
831 LDLM_DEBUG(lock
, "add lock into lru list");
833 /* If this is a client-side namespace and this was the last
834 * reference, put it on the LRU. */
835 ldlm_lock_add_to_lru(lock
);
836 unlock_res_and_lock(lock
);
838 if (lock
->l_flags
& LDLM_FL_FAIL_LOC
)
839 OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE
);
841 /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
842 * are not supported by the server, otherwise, it is done on
844 if (!exp_connect_cancelset(lock
->l_conn_export
) &&
845 !ns_connect_lru_resize(ns
))
846 ldlm_cancel_lru(ns
, 0, LCF_ASYNC
, 0);
848 LDLM_DEBUG(lock
, "do not add lock into lru list");
849 unlock_res_and_lock(lock
);
854 * Decrease reader/writer refcount for LDLM lock with handle \a lockh
856 void ldlm_lock_decref(struct lustre_handle
*lockh
, __u32 mode
)
858 struct ldlm_lock
*lock
= __ldlm_handle2lock(lockh
, 0);
860 LASSERTF(lock
!= NULL
, "Non-existing lock: %#llx\n", lockh
->cookie
);
861 ldlm_lock_decref_internal(lock
, mode
);
864 EXPORT_SYMBOL(ldlm_lock_decref
);
867 * Decrease reader/writer refcount for LDLM lock with handle
868 * \a lockh and mark it for subsequent cancellation once r/w refcount
869 * drops to zero instead of putting into LRU.
871 * Typical usage is for GROUP locks which we cannot allow to be cached.
873 void ldlm_lock_decref_and_cancel(struct lustre_handle
*lockh
, __u32 mode
)
875 struct ldlm_lock
*lock
= __ldlm_handle2lock(lockh
, 0);
877 LASSERT(lock
!= NULL
);
879 LDLM_DEBUG(lock
, "ldlm_lock_decref(%s)", ldlm_lockname
[mode
]);
880 lock_res_and_lock(lock
);
881 lock
->l_flags
|= LDLM_FL_CBPENDING
;
882 unlock_res_and_lock(lock
);
883 ldlm_lock_decref_internal(lock
, mode
);
886 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel
);
888 struct sl_insert_point
{
889 struct list_head
*res_link
;
890 struct list_head
*mode_link
;
891 struct list_head
*policy_link
;
895 * Finds a position to insert the new lock into granted lock list.
897 * Used for locks eligible for skiplist optimization.
900 * queue [input]: the granted list where search acts on;
901 * req [input]: the lock whose position to be located;
902 * prev [output]: positions within 3 lists to insert @req to
906 * - ldlm_grant_lock_with_skiplist
908 static void search_granted_lock(struct list_head
*queue
,
909 struct ldlm_lock
*req
,
910 struct sl_insert_point
*prev
)
912 struct list_head
*tmp
;
913 struct ldlm_lock
*lock
, *mode_end
, *policy_end
;
915 list_for_each(tmp
, queue
) {
916 lock
= list_entry(tmp
, struct ldlm_lock
, l_res_link
);
918 mode_end
= list_entry(lock
->l_sl_mode
.prev
,
919 struct ldlm_lock
, l_sl_mode
);
921 if (lock
->l_req_mode
!= req
->l_req_mode
) {
922 /* jump to last lock of mode group */
923 tmp
= &mode_end
->l_res_link
;
927 /* suitable mode group is found */
928 if (lock
->l_resource
->lr_type
== LDLM_PLAIN
) {
929 /* insert point is last lock of the mode group */
930 prev
->res_link
= &mode_end
->l_res_link
;
931 prev
->mode_link
= &mode_end
->l_sl_mode
;
932 prev
->policy_link
= &req
->l_sl_policy
;
936 if (lock
->l_resource
->lr_type
== LDLM_IBITS
) {
939 list_entry(lock
->l_sl_policy
.prev
,
943 if (lock
->l_policy_data
.l_inodebits
.bits
==
944 req
->l_policy_data
.l_inodebits
.bits
) {
945 /* insert point is last lock of
946 * the policy group */
948 &policy_end
->l_res_link
;
950 &policy_end
->l_sl_mode
;
952 &policy_end
->l_sl_policy
;
956 if (policy_end
== mode_end
)
957 /* done with mode group */
960 /* go to next policy group within mode group */
961 tmp
= policy_end
->l_res_link
.next
;
962 lock
= list_entry(tmp
, struct ldlm_lock
,
964 } /* loop over policy groups within the mode group */
966 /* insert point is last lock of the mode group,
967 * new policy group is started */
968 prev
->res_link
= &mode_end
->l_res_link
;
969 prev
->mode_link
= &mode_end
->l_sl_mode
;
970 prev
->policy_link
= &req
->l_sl_policy
;
974 LDLM_ERROR(lock
, "is not LDLM_PLAIN or LDLM_IBITS lock");
978 /* insert point is last lock on the queue,
979 * new mode group and new policy group are started */
980 prev
->res_link
= queue
->prev
;
981 prev
->mode_link
= &req
->l_sl_mode
;
982 prev
->policy_link
= &req
->l_sl_policy
;
986 * Add a lock into resource granted list after a position described by
989 static void ldlm_granted_list_add_lock(struct ldlm_lock
*lock
,
990 struct sl_insert_point
*prev
)
992 struct ldlm_resource
*res
= lock
->l_resource
;
994 check_res_locked(res
);
996 ldlm_resource_dump(D_INFO
, res
);
997 LDLM_DEBUG(lock
, "About to add lock:");
999 if (lock
->l_flags
& LDLM_FL_DESTROYED
) {
1000 CDEBUG(D_OTHER
, "Lock destroyed, not adding to resource\n");
1004 LASSERT(list_empty(&lock
->l_res_link
));
1005 LASSERT(list_empty(&lock
->l_sl_mode
));
1006 LASSERT(list_empty(&lock
->l_sl_policy
));
1009 * lock->link == prev->link means lock is first starting the group.
1010 * Don't re-add to itself to suppress kernel warnings.
1012 if (&lock
->l_res_link
!= prev
->res_link
)
1013 list_add(&lock
->l_res_link
, prev
->res_link
);
1014 if (&lock
->l_sl_mode
!= prev
->mode_link
)
1015 list_add(&lock
->l_sl_mode
, prev
->mode_link
);
1016 if (&lock
->l_sl_policy
!= prev
->policy_link
)
1017 list_add(&lock
->l_sl_policy
, prev
->policy_link
);
1021 * Add a lock to granted list on a resource maintaining skiplist
1024 static void ldlm_grant_lock_with_skiplist(struct ldlm_lock
*lock
)
1026 struct sl_insert_point prev
;
1028 LASSERT(lock
->l_req_mode
== lock
->l_granted_mode
);
1030 search_granted_lock(&lock
->l_resource
->lr_granted
, lock
, &prev
);
1031 ldlm_granted_list_add_lock(lock
, &prev
);
1035 * Perform lock granting bookkeeping.
1037 * Includes putting the lock into granted list and updating lock mode.
1039 * - ldlm_lock_enqueue
1040 * - ldlm_reprocess_queue
1041 * - ldlm_lock_convert
1043 * must be called with lr_lock held
1045 void ldlm_grant_lock(struct ldlm_lock
*lock
, struct list_head
*work_list
)
1047 struct ldlm_resource
*res
= lock
->l_resource
;
1049 check_res_locked(res
);
1051 lock
->l_granted_mode
= lock
->l_req_mode
;
1052 if (res
->lr_type
== LDLM_PLAIN
|| res
->lr_type
== LDLM_IBITS
)
1053 ldlm_grant_lock_with_skiplist(lock
);
1054 else if (res
->lr_type
== LDLM_EXTENT
)
1055 ldlm_extent_add_lock(res
, lock
);
1057 ldlm_resource_add_lock(res
, &res
->lr_granted
, lock
);
1059 if (lock
->l_granted_mode
< res
->lr_most_restr
)
1060 res
->lr_most_restr
= lock
->l_granted_mode
;
1062 if (work_list
&& lock
->l_completion_ast
!= NULL
)
1063 ldlm_add_ast_work_item(lock
, NULL
, work_list
);
1065 ldlm_pool_add(&ldlm_res_to_ns(res
)->ns_pool
, lock
);
1069 * Search for a lock with given properties in a queue.
1071 * \retval a referenced lock or NULL. See the flag descriptions below, in the
1072 * comment above ldlm_lock_match
1074 static struct ldlm_lock
*search_queue(struct list_head
*queue
,
1076 ldlm_policy_data_t
*policy
,
1077 struct ldlm_lock
*old_lock
,
1078 __u64 flags
, int unref
)
1080 struct ldlm_lock
*lock
;
1081 struct list_head
*tmp
;
1083 list_for_each(tmp
, queue
) {
1086 lock
= list_entry(tmp
, struct ldlm_lock
, l_res_link
);
1088 if (lock
== old_lock
)
1091 /* Check if this lock can be matched.
1092 * Used by LU-2919(exclusive open) for open lease lock */
1093 if (ldlm_is_excl(lock
))
1096 /* llite sometimes wants to match locks that will be
1097 * canceled when their users drop, but we allow it to match
1098 * if it passes in CBPENDING and the lock still has users.
1099 * this is generally only going to be used by children
1100 * whose parents already hold a lock so forward progress
1101 * can still happen. */
1102 if (lock
->l_flags
& LDLM_FL_CBPENDING
&&
1103 !(flags
& LDLM_FL_CBPENDING
))
1105 if (!unref
&& lock
->l_flags
& LDLM_FL_CBPENDING
&&
1106 lock
->l_readers
== 0 && lock
->l_writers
== 0)
1109 if (!(lock
->l_req_mode
& *mode
))
1111 match
= lock
->l_req_mode
;
1113 if (lock
->l_resource
->lr_type
== LDLM_EXTENT
&&
1114 (lock
->l_policy_data
.l_extent
.start
>
1115 policy
->l_extent
.start
||
1116 lock
->l_policy_data
.l_extent
.end
< policy
->l_extent
.end
))
1119 if (unlikely(match
== LCK_GROUP
) &&
1120 lock
->l_resource
->lr_type
== LDLM_EXTENT
&&
1121 lock
->l_policy_data
.l_extent
.gid
!= policy
->l_extent
.gid
)
1124 /* We match if we have existing lock with same or wider set
1126 if (lock
->l_resource
->lr_type
== LDLM_IBITS
&&
1127 ((lock
->l_policy_data
.l_inodebits
.bits
&
1128 policy
->l_inodebits
.bits
) !=
1129 policy
->l_inodebits
.bits
))
1132 if (!unref
&& (lock
->l_flags
& LDLM_FL_GONE_MASK
))
1135 if ((flags
& LDLM_FL_LOCAL_ONLY
) &&
1136 !(lock
->l_flags
& LDLM_FL_LOCAL
))
1139 if (flags
& LDLM_FL_TEST_LOCK
) {
1140 LDLM_LOCK_GET(lock
);
1141 ldlm_lock_touch_in_lru(lock
);
1143 ldlm_lock_addref_internal_nolock(lock
, match
);
1152 void ldlm_lock_fail_match_locked(struct ldlm_lock
*lock
)
1154 if ((lock
->l_flags
& LDLM_FL_FAIL_NOTIFIED
) == 0) {
1155 lock
->l_flags
|= LDLM_FL_FAIL_NOTIFIED
;
1156 wake_up_all(&lock
->l_waitq
);
1159 EXPORT_SYMBOL(ldlm_lock_fail_match_locked
);
1161 void ldlm_lock_fail_match(struct ldlm_lock
*lock
)
1163 lock_res_and_lock(lock
);
1164 ldlm_lock_fail_match_locked(lock
);
1165 unlock_res_and_lock(lock
);
1167 EXPORT_SYMBOL(ldlm_lock_fail_match
);
1170 * Mark lock as "matchable" by OST.
1172 * Used to prevent certain races in LOV/OSC where the lock is granted, but LVB
1174 * Assumes LDLM lock is already locked.
1176 void ldlm_lock_allow_match_locked(struct ldlm_lock
*lock
)
1178 lock
->l_flags
|= LDLM_FL_LVB_READY
;
1179 wake_up_all(&lock
->l_waitq
);
1181 EXPORT_SYMBOL(ldlm_lock_allow_match_locked
);
1184 * Mark lock as "matchable" by OST.
1185 * Locks the lock and then \see ldlm_lock_allow_match_locked
1187 void ldlm_lock_allow_match(struct ldlm_lock
*lock
)
1189 lock_res_and_lock(lock
);
1190 ldlm_lock_allow_match_locked(lock
);
1191 unlock_res_and_lock(lock
);
1193 EXPORT_SYMBOL(ldlm_lock_allow_match
);
1196 * Attempt to find a lock with specified properties.
1198 * Typically returns a reference to matched lock unless LDLM_FL_TEST_LOCK is
1201 * Can be called in two ways:
1203 * If 'ns' is NULL, then lockh describes an existing lock that we want to look
1204 * for a duplicate of.
1206 * Otherwise, all of the fields must be filled in, to match against.
1208 * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
1209 * server (ie, connh is NULL)
1210 * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
1211 * list will be considered
1212 * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
1213 * to be canceled can still be matched as long as they still have reader
1214 * or writer referneces
1215 * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
1216 * just tell us if we would have matched.
1218 * \retval 1 if it finds an already-existing lock that is compatible; in this
1219 * case, lockh is filled in with a addref()ed lock
1221 * We also check security context, and if that fails we simply return 0 (to
1222 * keep caller code unchanged), the context failure will be discovered by
1223 * caller sometime later.
1225 ldlm_mode_t
ldlm_lock_match(struct ldlm_namespace
*ns
, __u64 flags
,
1226 const struct ldlm_res_id
*res_id
, ldlm_type_t type
,
1227 ldlm_policy_data_t
*policy
, ldlm_mode_t mode
,
1228 struct lustre_handle
*lockh
, int unref
)
1230 struct ldlm_resource
*res
;
1231 struct ldlm_lock
*lock
, *old_lock
= NULL
;
1235 old_lock
= ldlm_handle2lock(lockh
);
1238 ns
= ldlm_lock_to_ns(old_lock
);
1239 res_id
= &old_lock
->l_resource
->lr_name
;
1240 type
= old_lock
->l_resource
->lr_type
;
1241 mode
= old_lock
->l_req_mode
;
1244 res
= ldlm_resource_get(ns
, NULL
, res_id
, type
, 0);
1246 LASSERT(old_lock
== NULL
);
1250 LDLM_RESOURCE_ADDREF(res
);
1253 lock
= search_queue(&res
->lr_granted
, &mode
, policy
, old_lock
,
1259 if (flags
& LDLM_FL_BLOCK_GRANTED
) {
1263 lock
= search_queue(&res
->lr_converting
, &mode
, policy
, old_lock
,
1269 lock
= search_queue(&res
->lr_waiting
, &mode
, policy
, old_lock
,
1278 LDLM_RESOURCE_DELREF(res
);
1279 ldlm_resource_putref(res
);
1282 ldlm_lock2handle(lock
, lockh
);
1283 if ((flags
& LDLM_FL_LVB_READY
) &&
1284 (!(lock
->l_flags
& LDLM_FL_LVB_READY
))) {
1285 __u64 wait_flags
= LDLM_FL_LVB_READY
|
1286 LDLM_FL_DESTROYED
| LDLM_FL_FAIL_NOTIFIED
;
1287 struct l_wait_info lwi
;
1289 if (lock
->l_completion_ast
) {
1290 int err
= lock
->l_completion_ast(lock
,
1291 LDLM_FL_WAIT_NOREPROC
,
1294 if (flags
& LDLM_FL_TEST_LOCK
)
1295 LDLM_LOCK_RELEASE(lock
);
1297 ldlm_lock_decref_internal(lock
,
1304 lwi
= LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout
),
1305 NULL
, LWI_ON_SIGNAL_NOOP
, NULL
);
1307 /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
1308 l_wait_event(lock
->l_waitq
,
1309 lock
->l_flags
& wait_flags
,
1311 if (!(lock
->l_flags
& LDLM_FL_LVB_READY
)) {
1312 if (flags
& LDLM_FL_TEST_LOCK
)
1313 LDLM_LOCK_RELEASE(lock
);
1315 ldlm_lock_decref_internal(lock
, mode
);
1322 LDLM_DEBUG(lock
, "matched (%llu %llu)",
1323 (type
== LDLM_PLAIN
|| type
== LDLM_IBITS
) ?
1324 res_id
->name
[2] : policy
->l_extent
.start
,
1325 (type
== LDLM_PLAIN
|| type
== LDLM_IBITS
) ?
1326 res_id
->name
[3] : policy
->l_extent
.end
);
1328 /* check user's security context */
1329 if (lock
->l_conn_export
&&
1330 sptlrpc_import_check_ctx(
1331 class_exp2cliimp(lock
->l_conn_export
))) {
1332 if (!(flags
& LDLM_FL_TEST_LOCK
))
1333 ldlm_lock_decref_internal(lock
, mode
);
1337 if (flags
& LDLM_FL_TEST_LOCK
)
1338 LDLM_LOCK_RELEASE(lock
);
1340 } else if (!(flags
& LDLM_FL_TEST_LOCK
)) {/*less verbose for test-only*/
1341 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res %llu/%llu (%llu %llu)",
1342 ns
, type
, mode
, res_id
->name
[0],
1344 (type
== LDLM_PLAIN
|| type
== LDLM_IBITS
) ?
1345 res_id
->name
[2] : policy
->l_extent
.start
,
1346 (type
== LDLM_PLAIN
|| type
== LDLM_IBITS
) ?
1347 res_id
->name
[3] : policy
->l_extent
.end
);
1350 LDLM_LOCK_PUT(old_lock
);
1352 return rc
? mode
: 0;
1354 EXPORT_SYMBOL(ldlm_lock_match
);
1356 ldlm_mode_t
ldlm_revalidate_lock_handle(struct lustre_handle
*lockh
,
1359 struct ldlm_lock
*lock
;
1360 ldlm_mode_t mode
= 0;
1362 lock
= ldlm_handle2lock(lockh
);
1364 lock_res_and_lock(lock
);
1365 if (lock
->l_flags
& LDLM_FL_GONE_MASK
)
1368 if (lock
->l_flags
& LDLM_FL_CBPENDING
&&
1369 lock
->l_readers
== 0 && lock
->l_writers
== 0)
1373 *bits
= lock
->l_policy_data
.l_inodebits
.bits
;
1374 mode
= lock
->l_granted_mode
;
1375 ldlm_lock_addref_internal_nolock(lock
, mode
);
1380 unlock_res_and_lock(lock
);
1381 LDLM_LOCK_PUT(lock
);
1385 EXPORT_SYMBOL(ldlm_revalidate_lock_handle
);
1387 /** The caller must guarantee that the buffer is large enough. */
1388 int ldlm_fill_lvb(struct ldlm_lock
*lock
, struct req_capsule
*pill
,
1389 enum req_location loc
, void *data
, int size
)
1393 LASSERT(data
!= NULL
);
1396 switch (lock
->l_lvb_type
) {
1398 if (size
== sizeof(struct ost_lvb
)) {
1399 if (loc
== RCL_CLIENT
)
1400 lvb
= req_capsule_client_swab_get(pill
,
1402 lustre_swab_ost_lvb
);
1404 lvb
= req_capsule_server_swab_get(pill
,
1406 lustre_swab_ost_lvb
);
1407 if (unlikely(lvb
== NULL
)) {
1408 LDLM_ERROR(lock
, "no LVB");
1412 memcpy(data
, lvb
, size
);
1413 } else if (size
== sizeof(struct ost_lvb_v1
)) {
1414 struct ost_lvb
*olvb
= data
;
1416 if (loc
== RCL_CLIENT
)
1417 lvb
= req_capsule_client_swab_get(pill
,
1419 lustre_swab_ost_lvb_v1
);
1421 lvb
= req_capsule_server_sized_swab_get(pill
,
1423 lustre_swab_ost_lvb_v1
);
1424 if (unlikely(lvb
== NULL
)) {
1425 LDLM_ERROR(lock
, "no LVB");
1429 memcpy(data
, lvb
, size
);
1430 olvb
->lvb_mtime_ns
= 0;
1431 olvb
->lvb_atime_ns
= 0;
1432 olvb
->lvb_ctime_ns
= 0;
1434 LDLM_ERROR(lock
, "Replied unexpected ost LVB size %d",
1440 if (size
== sizeof(struct lquota_lvb
)) {
1441 if (loc
== RCL_CLIENT
)
1442 lvb
= req_capsule_client_swab_get(pill
,
1444 lustre_swab_lquota_lvb
);
1446 lvb
= req_capsule_server_swab_get(pill
,
1448 lustre_swab_lquota_lvb
);
1449 if (unlikely(lvb
== NULL
)) {
1450 LDLM_ERROR(lock
, "no LVB");
1454 memcpy(data
, lvb
, size
);
1457 "Replied unexpected lquota LVB size %d",
1466 if (loc
== RCL_CLIENT
)
1467 lvb
= req_capsule_client_get(pill
, &RMF_DLM_LVB
);
1469 lvb
= req_capsule_server_get(pill
, &RMF_DLM_LVB
);
1470 if (unlikely(lvb
== NULL
)) {
1471 LDLM_ERROR(lock
, "no LVB");
1475 memcpy(data
, lvb
, size
);
1478 LDLM_ERROR(lock
, "Unknown LVB type: %d\n", lock
->l_lvb_type
);
1487 * Create and fill in new LDLM lock with specified properties.
1488 * Returns a referenced lock
1490 struct ldlm_lock
*ldlm_lock_create(struct ldlm_namespace
*ns
,
1491 const struct ldlm_res_id
*res_id
,
1494 const struct ldlm_callback_suite
*cbs
,
1495 void *data
, __u32 lvb_len
,
1496 enum lvb_type lvb_type
)
1498 struct ldlm_lock
*lock
;
1499 struct ldlm_resource
*res
;
1501 res
= ldlm_resource_get(ns
, NULL
, res_id
, type
, 1);
1505 lock
= ldlm_lock_new(res
);
1510 lock
->l_req_mode
= mode
;
1511 lock
->l_ast_data
= data
;
1512 lock
->l_pid
= current_pid();
1513 if (ns_is_server(ns
))
1514 lock
->l_flags
|= LDLM_FL_NS_SRV
;
1516 lock
->l_blocking_ast
= cbs
->lcs_blocking
;
1517 lock
->l_completion_ast
= cbs
->lcs_completion
;
1518 lock
->l_glimpse_ast
= cbs
->lcs_glimpse
;
1521 lock
->l_tree_node
= NULL
;
1522 /* if this is the extent lock, allocate the interval tree node */
1523 if (type
== LDLM_EXTENT
) {
1524 if (ldlm_interval_alloc(lock
) == NULL
)
1529 lock
->l_lvb_len
= lvb_len
;
1530 lock
->l_lvb_data
= kzalloc(lvb_len
, GFP_NOFS
);
1531 if (!lock
->l_lvb_data
)
1535 lock
->l_lvb_type
= lvb_type
;
1536 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK
))
1542 ldlm_lock_destroy(lock
);
1543 LDLM_LOCK_RELEASE(lock
);
1548 * Enqueue (request) a lock.
1550 * Does not block. As a result of enqueue the lock would be put
1551 * into granted or waiting list.
1553 * If namespace has intent policy sent and the lock has LDLM_FL_HAS_INTENT flag
1554 * set, skip all the enqueueing and delegate lock processing to intent policy
1557 ldlm_error_t
ldlm_lock_enqueue(struct ldlm_namespace
*ns
,
1558 struct ldlm_lock
**lockp
,
1559 void *cookie
, __u64
*flags
)
1561 struct ldlm_lock
*lock
= *lockp
;
1562 struct ldlm_resource
*res
= lock
->l_resource
;
1563 int local
= ns_is_client(ldlm_res_to_ns(res
));
1564 ldlm_error_t rc
= ELDLM_OK
;
1565 struct ldlm_interval
*node
= NULL
;
1567 lock
->l_last_activity
= get_seconds();
1568 /* policies are not executed on the client or during replay */
1569 if ((*flags
& (LDLM_FL_HAS_INTENT
|LDLM_FL_REPLAY
)) == LDLM_FL_HAS_INTENT
1570 && !local
&& ns
->ns_policy
) {
1571 rc
= ns
->ns_policy(ns
, lockp
, cookie
, lock
->l_req_mode
, *flags
,
1573 if (rc
== ELDLM_LOCK_REPLACED
) {
1574 /* The lock that was returned has already been granted,
1575 * and placed into lockp. If it's not the same as the
1576 * one we passed in, then destroy the old one and our
1577 * work here is done. */
1578 if (lock
!= *lockp
) {
1579 ldlm_lock_destroy(lock
);
1580 LDLM_LOCK_RELEASE(lock
);
1582 *flags
|= LDLM_FL_LOCK_CHANGED
;
1584 } else if (rc
!= ELDLM_OK
||
1585 (rc
== ELDLM_OK
&& (*flags
& LDLM_FL_INTENT_ONLY
))) {
1586 ldlm_lock_destroy(lock
);
1591 /* For a replaying lock, it might be already in granted list. So
1592 * unlinking the lock will cause the interval node to be freed, we
1593 * have to allocate the interval node early otherwise we can't regrant
1594 * this lock in the future. - jay */
1595 if (!local
&& (*flags
& LDLM_FL_REPLAY
) && res
->lr_type
== LDLM_EXTENT
)
1596 OBD_SLAB_ALLOC_PTR_GFP(node
, ldlm_interval_slab
, GFP_NOFS
);
1598 lock_res_and_lock(lock
);
1599 if (local
&& lock
->l_req_mode
== lock
->l_granted_mode
) {
1600 /* The server returned a blocked lock, but it was granted
1601 * before we got a chance to actually enqueue it. We don't
1602 * need to do anything else. */
1603 *flags
&= ~(LDLM_FL_BLOCK_GRANTED
|
1604 LDLM_FL_BLOCK_CONV
| LDLM_FL_BLOCK_WAIT
);
1608 ldlm_resource_unlink_lock(lock
);
1609 if (res
->lr_type
== LDLM_EXTENT
&& lock
->l_tree_node
== NULL
) {
1611 ldlm_lock_destroy_nolock(lock
);
1616 INIT_LIST_HEAD(&node
->li_group
);
1617 ldlm_interval_attach(node
, lock
);
1621 /* Some flags from the enqueue want to make it into the AST, via the
1622 * lock's l_flags. */
1623 lock
->l_flags
|= *flags
& LDLM_FL_AST_DISCARD_DATA
;
1625 /* This distinction between local lock trees is very important; a client
1626 * namespace only has information about locks taken by that client, and
1627 * thus doesn't have enough information to decide for itself if it can
1628 * be granted (below). In this case, we do exactly what the server
1629 * tells us to do, as dictated by the 'flags'.
1631 * We do exactly the same thing during recovery, when the server is
1632 * more or less trusting the clients not to lie.
1634 * FIXME (bug 268): Detect obvious lies by checking compatibility in
1635 * granted/converting queues. */
1637 if (*flags
& LDLM_FL_BLOCK_CONV
)
1638 ldlm_resource_add_lock(res
, &res
->lr_converting
, lock
);
1639 else if (*flags
& (LDLM_FL_BLOCK_WAIT
| LDLM_FL_BLOCK_GRANTED
))
1640 ldlm_resource_add_lock(res
, &res
->lr_waiting
, lock
);
1642 ldlm_grant_lock(lock
, NULL
);
1645 CERROR("This is client-side-only module, cannot handle LDLM_NAMESPACE_SERVER resource type lock.\n");
1650 unlock_res_and_lock(lock
);
1652 OBD_SLAB_FREE(node
, ldlm_interval_slab
, sizeof(*node
));
1658 * Process a call to blocking AST callback for a lock in ast_work list
1661 ldlm_work_bl_ast_lock(struct ptlrpc_request_set
*rqset
, void *opaq
)
1663 struct ldlm_cb_set_arg
*arg
= opaq
;
1664 struct ldlm_lock_desc d
;
1666 struct ldlm_lock
*lock
;
1668 if (list_empty(arg
->list
))
1671 lock
= list_entry(arg
->list
->next
, struct ldlm_lock
, l_bl_ast
);
1673 /* nobody should touch l_bl_ast */
1674 lock_res_and_lock(lock
);
1675 list_del_init(&lock
->l_bl_ast
);
1677 LASSERT(lock
->l_flags
& LDLM_FL_AST_SENT
);
1678 LASSERT(lock
->l_bl_ast_run
== 0);
1679 LASSERT(lock
->l_blocking_lock
);
1680 lock
->l_bl_ast_run
++;
1681 unlock_res_and_lock(lock
);
1683 ldlm_lock2desc(lock
->l_blocking_lock
, &d
);
1685 rc
= lock
->l_blocking_ast(lock
, &d
, (void *)arg
, LDLM_CB_BLOCKING
);
1686 LDLM_LOCK_RELEASE(lock
->l_blocking_lock
);
1687 lock
->l_blocking_lock
= NULL
;
1688 LDLM_LOCK_RELEASE(lock
);
1694 * Process a call to completion AST callback for a lock in ast_work list
1697 ldlm_work_cp_ast_lock(struct ptlrpc_request_set
*rqset
, void *opaq
)
1699 struct ldlm_cb_set_arg
*arg
= opaq
;
1701 struct ldlm_lock
*lock
;
1702 ldlm_completion_callback completion_callback
;
1704 if (list_empty(arg
->list
))
1707 lock
= list_entry(arg
->list
->next
, struct ldlm_lock
, l_cp_ast
);
1709 /* It's possible to receive a completion AST before we've set
1710 * the l_completion_ast pointer: either because the AST arrived
1711 * before the reply, or simply because there's a small race
1712 * window between receiving the reply and finishing the local
1713 * enqueue. (bug 842)
1715 * This can't happen with the blocking_ast, however, because we
1716 * will never call the local blocking_ast until we drop our
1717 * reader/writer reference, which we won't do until we get the
1718 * reply and finish enqueueing. */
1720 /* nobody should touch l_cp_ast */
1721 lock_res_and_lock(lock
);
1722 list_del_init(&lock
->l_cp_ast
);
1723 LASSERT(lock
->l_flags
& LDLM_FL_CP_REQD
);
1724 /* save l_completion_ast since it can be changed by
1725 * mds_intent_policy(), see bug 14225 */
1726 completion_callback
= lock
->l_completion_ast
;
1727 lock
->l_flags
&= ~LDLM_FL_CP_REQD
;
1728 unlock_res_and_lock(lock
);
1730 if (completion_callback
!= NULL
)
1731 rc
= completion_callback(lock
, 0, (void *)arg
);
1732 LDLM_LOCK_RELEASE(lock
);
1738 * Process a call to revocation AST callback for a lock in ast_work list
1741 ldlm_work_revoke_ast_lock(struct ptlrpc_request_set
*rqset
, void *opaq
)
1743 struct ldlm_cb_set_arg
*arg
= opaq
;
1744 struct ldlm_lock_desc desc
;
1746 struct ldlm_lock
*lock
;
1748 if (list_empty(arg
->list
))
1751 lock
= list_entry(arg
->list
->next
, struct ldlm_lock
, l_rk_ast
);
1752 list_del_init(&lock
->l_rk_ast
);
1754 /* the desc just pretend to exclusive */
1755 ldlm_lock2desc(lock
, &desc
);
1756 desc
.l_req_mode
= LCK_EX
;
1757 desc
.l_granted_mode
= 0;
1759 rc
= lock
->l_blocking_ast(lock
, &desc
, (void *)arg
, LDLM_CB_BLOCKING
);
1760 LDLM_LOCK_RELEASE(lock
);
1766 * Process a call to glimpse AST callback for a lock in ast_work list
1768 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set
*rqset
, void *opaq
)
1770 struct ldlm_cb_set_arg
*arg
= opaq
;
1771 struct ldlm_glimpse_work
*gl_work
;
1772 struct ldlm_lock
*lock
;
1775 if (list_empty(arg
->list
))
1778 gl_work
= list_entry(arg
->list
->next
, struct ldlm_glimpse_work
,
1780 list_del_init(&gl_work
->gl_list
);
1782 lock
= gl_work
->gl_lock
;
1784 /* transfer the glimpse descriptor to ldlm_cb_set_arg */
1785 arg
->gl_desc
= gl_work
->gl_desc
;
1787 /* invoke the actual glimpse callback */
1788 if (lock
->l_glimpse_ast(lock
, (void *)arg
) == 0)
1791 LDLM_LOCK_RELEASE(lock
);
1793 if ((gl_work
->gl_flags
& LDLM_GL_WORK_NOFREE
) == 0)
1800 * Process list of locks in need of ASTs being sent.
1802 * Used on server to send multiple ASTs together instead of sending one by
1805 int ldlm_run_ast_work(struct ldlm_namespace
*ns
, struct list_head
*rpc_list
,
1806 enum ldlm_desc_ast_t ast_type
)
1808 struct ldlm_cb_set_arg
*arg
;
1809 set_producer_func work_ast_lock
;
1812 if (list_empty(rpc_list
))
1815 arg
= kzalloc(sizeof(*arg
), GFP_NOFS
);
1819 atomic_set(&arg
->restart
, 0);
1820 arg
->list
= rpc_list
;
1823 case LDLM_WORK_BL_AST
:
1824 arg
->type
= LDLM_BL_CALLBACK
;
1825 work_ast_lock
= ldlm_work_bl_ast_lock
;
1827 case LDLM_WORK_CP_AST
:
1828 arg
->type
= LDLM_CP_CALLBACK
;
1829 work_ast_lock
= ldlm_work_cp_ast_lock
;
1831 case LDLM_WORK_REVOKE_AST
:
1832 arg
->type
= LDLM_BL_CALLBACK
;
1833 work_ast_lock
= ldlm_work_revoke_ast_lock
;
1835 case LDLM_WORK_GL_AST
:
1836 arg
->type
= LDLM_GL_CALLBACK
;
1837 work_ast_lock
= ldlm_work_gl_ast_lock
;
1843 /* We create a ptlrpc request set with flow control extension.
1844 * This request set will use the work_ast_lock function to produce new
1845 * requests and will send a new request each time one completes in order
1846 * to keep the number of requests in flight to ns_max_parallel_ast */
1847 arg
->set
= ptlrpc_prep_fcset(ns
->ns_max_parallel_ast
? : UINT_MAX
,
1848 work_ast_lock
, arg
);
1849 if (arg
->set
== NULL
) {
1854 ptlrpc_set_wait(arg
->set
);
1855 ptlrpc_set_destroy(arg
->set
);
1857 rc
= atomic_read(&arg
->restart
) ? -ERESTART
: 0;
1864 static int reprocess_one_queue(struct ldlm_resource
*res
, void *closure
)
1866 ldlm_reprocess_all(res
);
1867 return LDLM_ITER_CONTINUE
;
1870 static int ldlm_reprocess_res(struct cfs_hash
*hs
, struct cfs_hash_bd
*bd
,
1871 struct hlist_node
*hnode
, void *arg
)
1873 struct ldlm_resource
*res
= cfs_hash_object(hs
, hnode
);
1876 rc
= reprocess_one_queue(res
, arg
);
1878 return rc
== LDLM_ITER_STOP
;
1882 * Iterate through all resources on a namespace attempting to grant waiting
1885 void ldlm_reprocess_all_ns(struct ldlm_namespace
*ns
)
1888 cfs_hash_for_each_nolock(ns
->ns_rs_hash
,
1889 ldlm_reprocess_res
, NULL
);
1892 EXPORT_SYMBOL(ldlm_reprocess_all_ns
);
1895 * Try to grant all waiting locks on a resource.
1897 * Calls ldlm_reprocess_queue on converting and waiting queues.
1899 * Typically called after some resource locks are cancelled to see
1900 * if anything could be granted as a result of the cancellation.
1902 void ldlm_reprocess_all(struct ldlm_resource
*res
)
1904 LIST_HEAD(rpc_list
);
1906 if (!ns_is_client(ldlm_res_to_ns(res
))) {
1907 CERROR("This is client-side-only module, cannot handle LDLM_NAMESPACE_SERVER resource type lock.\n");
1913 * Helper function to call blocking AST for LDLM lock \a lock in a
1914 * "cancelling" mode.
1916 void ldlm_cancel_callback(struct ldlm_lock
*lock
)
1918 check_res_locked(lock
->l_resource
);
1919 if (!(lock
->l_flags
& LDLM_FL_CANCEL
)) {
1920 lock
->l_flags
|= LDLM_FL_CANCEL
;
1921 if (lock
->l_blocking_ast
) {
1922 unlock_res_and_lock(lock
);
1923 lock
->l_blocking_ast(lock
, NULL
, lock
->l_ast_data
,
1925 lock_res_and_lock(lock
);
1927 LDLM_DEBUG(lock
, "no blocking ast");
1930 lock
->l_flags
|= LDLM_FL_BL_DONE
;
1934 * Remove skiplist-enabled LDLM lock \a req from granted list
1936 void ldlm_unlink_lock_skiplist(struct ldlm_lock
*req
)
1938 if (req
->l_resource
->lr_type
!= LDLM_PLAIN
&&
1939 req
->l_resource
->lr_type
!= LDLM_IBITS
)
1942 list_del_init(&req
->l_sl_policy
);
1943 list_del_init(&req
->l_sl_mode
);
1947 * Attempts to cancel LDLM lock \a lock that has no reader/writer references.
1949 void ldlm_lock_cancel(struct ldlm_lock
*lock
)
1951 struct ldlm_resource
*res
;
1952 struct ldlm_namespace
*ns
;
1954 lock_res_and_lock(lock
);
1956 res
= lock
->l_resource
;
1957 ns
= ldlm_res_to_ns(res
);
1959 /* Please do not, no matter how tempting, remove this LBUG without
1960 * talking to me first. -phik */
1961 if (lock
->l_readers
|| lock
->l_writers
) {
1962 LDLM_ERROR(lock
, "lock still has references");
1966 if (lock
->l_flags
& LDLM_FL_WAITED
)
1967 ldlm_del_waiting_lock(lock
);
1969 /* Releases cancel callback. */
1970 ldlm_cancel_callback(lock
);
1972 /* Yes, second time, just in case it was added again while we were
1973 * running with no res lock in ldlm_cancel_callback */
1974 if (lock
->l_flags
& LDLM_FL_WAITED
)
1975 ldlm_del_waiting_lock(lock
);
1977 ldlm_resource_unlink_lock(lock
);
1978 ldlm_lock_destroy_nolock(lock
);
1980 if (lock
->l_granted_mode
== lock
->l_req_mode
)
1981 ldlm_pool_del(&ns
->ns_pool
, lock
);
1983 /* Make sure we will not be called again for same lock what is possible
1984 * if not to zero out lock->l_granted_mode */
1985 lock
->l_granted_mode
= LCK_MINMODE
;
1986 unlock_res_and_lock(lock
);
1988 EXPORT_SYMBOL(ldlm_lock_cancel
);
1991 * Set opaque data into the lock that only makes sense to upper layer.
1993 int ldlm_lock_set_data(struct lustre_handle
*lockh
, void *data
)
1995 struct ldlm_lock
*lock
= ldlm_handle2lock(lockh
);
1999 if (lock
->l_ast_data
== NULL
)
2000 lock
->l_ast_data
= data
;
2001 if (lock
->l_ast_data
== data
)
2003 LDLM_LOCK_PUT(lock
);
2007 EXPORT_SYMBOL(ldlm_lock_set_data
);
2009 struct export_cl_data
{
2010 struct obd_export
*ecl_exp
;
2015 * Iterator function for ldlm_cancel_locks_for_export.
2016 * Cancels passed locks.
2018 int ldlm_cancel_locks_for_export_cb(struct cfs_hash
*hs
, struct cfs_hash_bd
*bd
,
2019 struct hlist_node
*hnode
, void *data
)
2022 struct export_cl_data
*ecl
= (struct export_cl_data
*)data
;
2023 struct obd_export
*exp
= ecl
->ecl_exp
;
2024 struct ldlm_lock
*lock
= cfs_hash_object(hs
, hnode
);
2025 struct ldlm_resource
*res
;
2027 res
= ldlm_resource_getref(lock
->l_resource
);
2028 LDLM_LOCK_GET(lock
);
2030 LDLM_DEBUG(lock
, "export %p", exp
);
2031 ldlm_res_lvbo_update(res
, NULL
, 1);
2032 ldlm_lock_cancel(lock
);
2033 ldlm_reprocess_all(res
);
2034 ldlm_resource_putref(res
);
2035 LDLM_LOCK_RELEASE(lock
);
2038 if ((ecl
->ecl_loop
& -ecl
->ecl_loop
) == ecl
->ecl_loop
) {
2040 "Cancel lock %p for export %p (loop %d), still have %d locks left on hash table.\n",
2041 lock
, exp
, ecl
->ecl_loop
,
2042 atomic_read(&hs
->hs_count
));
2049 * Cancel all locks for given export.
2051 * Typically called on client disconnection/eviction
2053 void ldlm_cancel_locks_for_export(struct obd_export
*exp
)
2055 struct export_cl_data ecl
= {
2060 cfs_hash_for_each_empty(exp
->exp_lock_hash
,
2061 ldlm_cancel_locks_for_export_cb
, &ecl
);
2065 * Downgrade an exclusive lock.
2067 * A fast variant of ldlm_lock_convert for conversion of exclusive
2068 * locks. The conversion is always successful.
2069 * Used by Commit on Sharing (COS) code.
2071 * \param lock A lock to convert
2072 * \param new_mode new lock mode
2074 void ldlm_lock_downgrade(struct ldlm_lock
*lock
, int new_mode
)
2076 LASSERT(lock
->l_granted_mode
& (LCK_PW
| LCK_EX
));
2077 LASSERT(new_mode
== LCK_COS
);
2079 lock_res_and_lock(lock
);
2080 ldlm_resource_unlink_lock(lock
);
2082 * Remove the lock from pool as it will be added again in
2083 * ldlm_grant_lock() called below.
2085 ldlm_pool_del(&ldlm_lock_to_ns(lock
)->ns_pool
, lock
);
2087 lock
->l_req_mode
= new_mode
;
2088 ldlm_grant_lock(lock
, NULL
);
2089 unlock_res_and_lock(lock
);
2090 ldlm_reprocess_all(lock
->l_resource
);
2092 EXPORT_SYMBOL(ldlm_lock_downgrade
);
2095 * Attempt to convert already granted lock to a different mode.
2097 * While lock conversion is not currently used, future client-side
2098 * optimizations could take advantage of it to avoid discarding cached
2101 struct ldlm_resource
*ldlm_lock_convert(struct ldlm_lock
*lock
, int new_mode
,
2104 LIST_HEAD(rpc_list
);
2105 struct ldlm_resource
*res
;
2106 struct ldlm_namespace
*ns
;
2108 struct ldlm_interval
*node
;
2110 /* Just return if mode is unchanged. */
2111 if (new_mode
== lock
->l_granted_mode
) {
2112 *flags
|= LDLM_FL_BLOCK_GRANTED
;
2113 return lock
->l_resource
;
2116 /* I can't check the type of lock here because the bitlock of lock
2117 * is not held here, so do the allocation blindly. -jay */
2118 OBD_SLAB_ALLOC_PTR_GFP(node
, ldlm_interval_slab
, GFP_NOFS
);
2120 /* Actually, this causes EDEADLOCK to be returned */
2123 LASSERTF((new_mode
== LCK_PW
&& lock
->l_granted_mode
== LCK_PR
),
2124 "new_mode %u, granted %u\n", new_mode
, lock
->l_granted_mode
);
2126 lock_res_and_lock(lock
);
2128 res
= lock
->l_resource
;
2129 ns
= ldlm_res_to_ns(res
);
2131 lock
->l_req_mode
= new_mode
;
2132 if (res
->lr_type
== LDLM_PLAIN
|| res
->lr_type
== LDLM_IBITS
) {
2133 ldlm_resource_unlink_lock(lock
);
2135 ldlm_resource_unlink_lock(lock
);
2136 if (res
->lr_type
== LDLM_EXTENT
) {
2137 /* FIXME: ugly code, I have to attach the lock to a
2138 * interval node again since perhaps it will be granted
2140 INIT_LIST_HEAD(&node
->li_group
);
2141 ldlm_interval_attach(node
, lock
);
2147 * Remove old lock from the pool before adding the lock with new
2148 * mode below in ->policy()
2150 ldlm_pool_del(&ns
->ns_pool
, lock
);
2152 /* If this is a local resource, put it on the appropriate list. */
2153 if (ns_is_client(ldlm_res_to_ns(res
))) {
2154 if (*flags
& (LDLM_FL_BLOCK_CONV
| LDLM_FL_BLOCK_GRANTED
)) {
2155 ldlm_resource_add_lock(res
, &res
->lr_converting
, lock
);
2157 /* This should never happen, because of the way the
2158 * server handles conversions. */
2159 LDLM_ERROR(lock
, "Erroneous flags %x on local lock\n",
2163 ldlm_grant_lock(lock
, &rpc_list
);
2165 /* FIXME: completion handling not with lr_lock held ! */
2166 if (lock
->l_completion_ast
)
2167 lock
->l_completion_ast(lock
, 0, NULL
);
2170 CERROR("This is client-side-only module, cannot handle LDLM_NAMESPACE_SERVER resource type lock.\n");
2173 unlock_res_and_lock(lock
);
2176 ldlm_run_ast_work(ns
, &rpc_list
, LDLM_WORK_CP_AST
);
2178 OBD_SLAB_FREE(node
, ldlm_interval_slab
, sizeof(*node
));
2181 EXPORT_SYMBOL(ldlm_lock_convert
);
2184 * Print lock with lock handle \a lockh description into debug log.
2186 * Used when printing all locks on a resource for debug purposes.
2188 void ldlm_lock_dump_handle(int level
, struct lustre_handle
*lockh
)
2190 struct ldlm_lock
*lock
;
2192 if (!((libcfs_debug
| D_ERROR
) & level
))
2195 lock
= ldlm_handle2lock(lockh
);
2199 LDLM_DEBUG_LIMIT(level
, lock
, "###");
2201 LDLM_LOCK_PUT(lock
);
2203 EXPORT_SYMBOL(ldlm_lock_dump_handle
);
2206 * Print lock information with custom message into debug log.
2209 void _ldlm_lock_debug(struct ldlm_lock
*lock
,
2210 struct libcfs_debug_msg_data
*msgdata
,
2211 const char *fmt
, ...)
2214 struct obd_export
*exp
= lock
->l_export
;
2215 struct ldlm_resource
*resource
= lock
->l_resource
;
2216 char *nid
= "local";
2218 va_start(args
, fmt
);
2220 if (exp
&& exp
->exp_connection
) {
2221 nid
= libcfs_nid2str(exp
->exp_connection
->c_peer
.nid
);
2222 } else if (exp
&& exp
->exp_obd
!= NULL
) {
2223 struct obd_import
*imp
= exp
->exp_obd
->u
.cli
.cl_import
;
2225 nid
= libcfs_nid2str(imp
->imp_connection
->c_peer
.nid
);
2228 if (resource
== NULL
) {
2229 libcfs_debug_vmsg2(msgdata
, fmt
, args
,
2230 " ns: \?\? lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: \?\? rrc=\?\? type: \?\?\? flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2232 lock
->l_handle
.h_cookie
, atomic_read(&lock
->l_refc
),
2233 lock
->l_readers
, lock
->l_writers
,
2234 ldlm_lockname
[lock
->l_granted_mode
],
2235 ldlm_lockname
[lock
->l_req_mode
],
2236 lock
->l_flags
, nid
, lock
->l_remote_handle
.cookie
,
2237 exp
? atomic_read(&exp
->exp_refcount
) : -99,
2238 lock
->l_pid
, lock
->l_callback_timeout
, lock
->l_lvb_type
);
2243 switch (resource
->lr_type
) {
2245 libcfs_debug_vmsg2(msgdata
, fmt
, args
,
2246 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES
" rrc: %d type: %s [%llu->%llu] (req %llu->%llu) flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2247 ldlm_lock_to_ns_name(lock
), lock
,
2248 lock
->l_handle
.h_cookie
, atomic_read(&lock
->l_refc
),
2249 lock
->l_readers
, lock
->l_writers
,
2250 ldlm_lockname
[lock
->l_granted_mode
],
2251 ldlm_lockname
[lock
->l_req_mode
],
2253 atomic_read(&resource
->lr_refcount
),
2254 ldlm_typename
[resource
->lr_type
],
2255 lock
->l_policy_data
.l_extent
.start
,
2256 lock
->l_policy_data
.l_extent
.end
,
2257 lock
->l_req_extent
.start
, lock
->l_req_extent
.end
,
2258 lock
->l_flags
, nid
, lock
->l_remote_handle
.cookie
,
2259 exp
? atomic_read(&exp
->exp_refcount
) : -99,
2260 lock
->l_pid
, lock
->l_callback_timeout
,
2265 libcfs_debug_vmsg2(msgdata
, fmt
, args
,
2266 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES
" rrc: %d type: %s pid: %d [%llu->%llu] flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu\n",
2267 ldlm_lock_to_ns_name(lock
), lock
,
2268 lock
->l_handle
.h_cookie
, atomic_read(&lock
->l_refc
),
2269 lock
->l_readers
, lock
->l_writers
,
2270 ldlm_lockname
[lock
->l_granted_mode
],
2271 ldlm_lockname
[lock
->l_req_mode
],
2273 atomic_read(&resource
->lr_refcount
),
2274 ldlm_typename
[resource
->lr_type
],
2275 lock
->l_policy_data
.l_flock
.pid
,
2276 lock
->l_policy_data
.l_flock
.start
,
2277 lock
->l_policy_data
.l_flock
.end
,
2278 lock
->l_flags
, nid
, lock
->l_remote_handle
.cookie
,
2279 exp
? atomic_read(&exp
->exp_refcount
) : -99,
2280 lock
->l_pid
, lock
->l_callback_timeout
);
2284 libcfs_debug_vmsg2(msgdata
, fmt
, args
,
2285 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES
" bits %#llx rrc: %d type: %s flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2286 ldlm_lock_to_ns_name(lock
),
2287 lock
, lock
->l_handle
.h_cookie
,
2288 atomic_read(&lock
->l_refc
),
2289 lock
->l_readers
, lock
->l_writers
,
2290 ldlm_lockname
[lock
->l_granted_mode
],
2291 ldlm_lockname
[lock
->l_req_mode
],
2293 lock
->l_policy_data
.l_inodebits
.bits
,
2294 atomic_read(&resource
->lr_refcount
),
2295 ldlm_typename
[resource
->lr_type
],
2296 lock
->l_flags
, nid
, lock
->l_remote_handle
.cookie
,
2297 exp
? atomic_read(&exp
->exp_refcount
) : -99,
2298 lock
->l_pid
, lock
->l_callback_timeout
,
2303 libcfs_debug_vmsg2(msgdata
, fmt
, args
,
2304 " ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES
" rrc: %d type: %s flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lu lvb_type: %d\n",
2305 ldlm_lock_to_ns_name(lock
),
2306 lock
, lock
->l_handle
.h_cookie
,
2307 atomic_read(&lock
->l_refc
),
2308 lock
->l_readers
, lock
->l_writers
,
2309 ldlm_lockname
[lock
->l_granted_mode
],
2310 ldlm_lockname
[lock
->l_req_mode
],
2312 atomic_read(&resource
->lr_refcount
),
2313 ldlm_typename
[resource
->lr_type
],
2314 lock
->l_flags
, nid
, lock
->l_remote_handle
.cookie
,
2315 exp
? atomic_read(&exp
->exp_refcount
) : -99,
2316 lock
->l_pid
, lock
->l_callback_timeout
,
2322 EXPORT_SYMBOL(_ldlm_lock_debug
);