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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,
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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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.
37 /** \defgroup LDLM Lustre Distributed Lock Manager
39 * Lustre DLM is based on VAX DLM.
40 * Its two main roles are:
41 * - To provide locking assuring consistency of data on all Lustre nodes.
42 * - To allow clients to cache state protected by a lock by holding the
43 * lock until a conflicting lock is requested or it is expired by the LRU.
48 #ifndef _LUSTRE_DLM_H__
49 #define _LUSTRE_DLM_H__
51 #include "lustre_lib.h"
52 #include "lustre_net.h"
53 #include "lustre_import.h"
54 #include "lustre_handles.h"
55 #include "interval_tree.h" /* for interval_node{}, ldlm_extent */
58 #include "lustre_dlm_flags.h"
63 extern struct kset
*ldlm_ns_kset
;
64 extern struct kset
*ldlm_svc_kset
;
66 #define OBD_LDLM_DEVICENAME "ldlm"
68 #define LDLM_DEFAULT_LRU_SIZE (100 * num_online_cpus())
69 #define LDLM_DEFAULT_MAX_ALIVE (cfs_time_seconds(36000))
70 #define LDLM_DEFAULT_PARALLEL_AST_LIMIT 1024
73 * LDLM non-error return states
78 ELDLM_LOCK_CHANGED
= 300,
79 ELDLM_LOCK_ABORTED
= 301,
80 ELDLM_LOCK_REPLACED
= 302,
81 ELDLM_NO_LOCK_DATA
= 303,
82 ELDLM_LOCK_WOULDBLOCK
= 304,
84 ELDLM_NAMESPACE_EXISTS
= 400,
85 ELDLM_BAD_NAMESPACE
= 401
89 * LDLM namespace type.
90 * The "client" type is actually an indication that this is a narrow local view
91 * into complete namespace on the server. Such namespaces cannot make any
92 * decisions about lack of conflicts or do any autonomous lock granting without
93 * first speaking to a server.
96 LDLM_NAMESPACE_SERVER
= 1 << 0,
97 LDLM_NAMESPACE_CLIENT
= 1 << 1
101 * The blocking callback is overloaded to perform two functions. These flags
102 * indicate which operation should be performed.
104 #define LDLM_CB_BLOCKING 1
105 #define LDLM_CB_CANCELING 2
108 * \name Lock Compatibility Matrix.
110 * A lock has both a type (extent, flock, inode bits, or plain) and a mode.
111 * Lock types are described in their respective implementation files:
112 * ldlm_{extent,flock,inodebits,plain}.c.
114 * There are six lock modes along with a compatibility matrix to indicate if
115 * two locks are compatible.
117 * - EX: Exclusive mode. Before a new file is created, MDS requests EX lock
119 * - PW: Protective Write (normal write) mode. When a client requests a write
120 * lock from an OST, a lock with PW mode will be issued.
121 * - PR: Protective Read (normal read) mode. When a client requests a read from
122 * an OST, a lock with PR mode will be issued. Also, if the client opens a
123 * file for execution, it is granted a lock with PR mode.
124 * - CW: Concurrent Write mode. The type of lock that the MDS grants if a client
125 * requests a write lock during a file open operation.
126 * - CR Concurrent Read mode. When a client performs a path lookup, MDS grants
127 * an inodebit lock with the CR mode on the intermediate path component.
141 #define LCK_COMPAT_EX LCK_NL
142 #define LCK_COMPAT_PW (LCK_COMPAT_EX | LCK_CR)
143 #define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
144 #define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
145 #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
146 #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX | LCK_GROUP)
147 #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
148 #define LCK_COMPAT_COS (LCK_COS)
149 /** @} Lock Compatibility Matrix */
151 extern ldlm_mode_t lck_compat_array
[];
153 static inline void lockmode_verify(ldlm_mode_t mode
)
155 LASSERT(mode
> LCK_MINMODE
&& mode
< LCK_MAXMODE
);
158 static inline int lockmode_compat(ldlm_mode_t exist_mode
, ldlm_mode_t new_mode
)
160 return (lck_compat_array
[exist_mode
] & new_mode
);
165 * cluster name spaces
169 #define DLM_OST_NAMESPACE 1
170 #define DLM_MDS_NAMESPACE 2
173 - do we just separate this by security domains and use a prefix for
174 multiple namespaces in the same domain?
179 * Locking rules for LDLM:
184 * waiting_locks_spinlock
199 struct ldlm_resource
;
200 struct ldlm_namespace
;
203 * Operations on LDLM pools.
204 * LDLM pool is a pool of locks in the namespace without any implicitly
206 * Locks in the pool are organized in LRU.
207 * Local memory pressure or server instructions (e.g. mempressure on server)
208 * can trigger freeing of locks from the pool
210 struct ldlm_pool_ops
{
211 /** Recalculate pool \a pl usage */
212 int (*po_recalc
)(struct ldlm_pool
*pl
);
213 /** Cancel at least \a nr locks from pool \a pl */
214 int (*po_shrink
)(struct ldlm_pool
*pl
, int nr
,
216 int (*po_setup
)(struct ldlm_pool
*pl
, int limit
);
219 /** One second for pools thread check interval. Each pool has own period. */
220 #define LDLM_POOLS_THREAD_PERIOD (1)
222 /** ~6% margin for modest pools. See ldlm_pool.c for details. */
223 #define LDLM_POOLS_MODEST_MARGIN_SHIFT (4)
225 /** Default recalc period for server side pools in sec. */
226 #define LDLM_POOL_SRV_DEF_RECALC_PERIOD (1)
228 /** Default recalc period for client side pools in sec. */
229 #define LDLM_POOL_CLI_DEF_RECALC_PERIOD (10)
232 * LDLM pool structure to track granted locks.
233 * For purposes of determining when to release locks on e.g. memory pressure.
234 * This feature is commonly referred to as lru_resize.
237 /** Pool debugfs directory. */
238 struct dentry
*pl_debugfs_entry
;
239 /** Pool name, must be long enough to hold compound proc entry name. */
241 /** Lock for protecting SLV/CLV updates. */
243 /** Number of allowed locks in in pool, both, client and server side. */
245 /** Number of granted locks in */
247 /** Grant rate per T. */
248 atomic_t pl_grant_rate
;
249 /** Cancel rate per T. */
250 atomic_t pl_cancel_rate
;
251 /** Server lock volume (SLV). Protected by pl_lock. */
252 __u64 pl_server_lock_volume
;
253 /** Current biggest client lock volume. Protected by pl_lock. */
254 __u64 pl_client_lock_volume
;
255 /** Lock volume factor. SLV on client is calculated as following:
256 * server_slv * lock_volume_factor. */
257 atomic_t pl_lock_volume_factor
;
258 /** Time when last SLV from server was obtained. */
259 time_t pl_recalc_time
;
260 /** Recalculation period for pool. */
261 time_t pl_recalc_period
;
262 /** Recalculation and shrink operations. */
263 const struct ldlm_pool_ops
*pl_ops
;
264 /** Number of planned locks for next period. */
266 /** Pool statistics. */
267 struct lprocfs_stats
*pl_stats
;
270 struct kobject pl_kobj
;
271 struct completion pl_kobj_unregister
;
274 typedef int (*ldlm_res_policy
)(struct ldlm_namespace
*, struct ldlm_lock
**,
275 void *req_cookie
, ldlm_mode_t mode
, __u64 flags
,
278 typedef int (*ldlm_cancel_for_recovery
)(struct ldlm_lock
*lock
);
282 * LVB is Lock Value Block. This is a special opaque (to LDLM) value that could
283 * be associated with an LDLM lock and transferred from client to server and
286 * Currently LVBs are used by:
287 * - OSC-OST code to maintain current object size/times
288 * - layout lock code to return the layout when the layout lock is granted
290 struct ldlm_valblock_ops
{
291 int (*lvbo_init
)(struct ldlm_resource
*res
);
292 int (*lvbo_update
)(struct ldlm_resource
*res
,
293 struct ptlrpc_request
*r
,
295 int (*lvbo_free
)(struct ldlm_resource
*res
);
296 /* Return size of lvb data appropriate RPC size can be reserved */
297 int (*lvbo_size
)(struct ldlm_lock
*lock
);
298 /* Called to fill in lvb data to RPC buffer @buf */
299 int (*lvbo_fill
)(struct ldlm_lock
*lock
, void *buf
, int buflen
);
303 * LDLM pools related, type of lock pool in the namespace.
304 * Greedy means release cached locks aggressively
307 LDLM_NAMESPACE_GREEDY
= 1 << 0,
308 LDLM_NAMESPACE_MODEST
= 1 << 1
311 struct ldlm_ns_bucket
{
312 /** back pointer to namespace */
313 struct ldlm_namespace
*nsb_namespace
;
315 * Estimated lock callback time. Used by adaptive timeout code to
316 * avoid spurious client evictions due to unresponsiveness when in
317 * fact the network or overall system load is at fault
319 struct adaptive_timeout nsb_at_estimate
;
323 /** LDLM namespace lock stats */
330 LDLM_NS_TYPE_UNKNOWN
= 0,
348 * Namespace serves to contain locks related to a particular service.
349 * There are two kinds of namespaces:
350 * - Server namespace has knowledge of all locks and is therefore authoritative
351 * to make decisions like what locks could be granted and what conflicts
352 * exist during new lock enqueue.
353 * - Client namespace only has limited knowledge about locks in the namespace,
354 * only seeing locks held by the client.
356 * Every Lustre service has one server namespace present on the server serving
357 * that service. Every client connected to the service has a client namespace
359 * Every lock obtained by client in that namespace is actually represented by
360 * two in-memory locks. One on the server and one on the client. The locks are
361 * linked by a special cookie by which one node can tell to the other which lock
362 * it actually means during communications. Such locks are called remote locks.
363 * The locks held by server only without any reference to a client are called
366 struct ldlm_namespace
{
367 /** Backward link to OBD, required for LDLM pool to store new SLV. */
368 struct obd_device
*ns_obd
;
370 /** Flag indicating if namespace is on client instead of server */
371 ldlm_side_t ns_client
;
373 /** Resource hash table for namespace. */
374 struct cfs_hash
*ns_rs_hash
;
379 /** big refcount (by bucket) */
383 * Namespace connect flags supported by server (may be changed via
384 * /proc, LRU resize may be disabled/enabled).
386 __u64 ns_connect_flags
;
388 /** Client side original connect flags supported by server. */
389 __u64 ns_orig_connect_flags
;
391 /* namespace debugfs dir entry */
392 struct dentry
*ns_debugfs_entry
;
395 * Position in global namespace list linking all namespaces on
398 struct list_head ns_list_chain
;
401 * List of unused locks for this namespace. This list is also called
403 * Unused locks are locks with zero reader/writer reference counts.
404 * This list is only used on clients for lock caching purposes.
405 * When we want to release some locks voluntarily or if server wants
406 * us to release some locks due to e.g. memory pressure, we take locks
407 * to release from the head of this list.
408 * Locks are linked via l_lru field in \see struct ldlm_lock.
410 struct list_head ns_unused_list
;
411 /** Number of locks in the LRU list above */
415 * Maximum number of locks permitted in the LRU. If 0, means locks
416 * are managed by pools and there is no preset limit, rather it is all
417 * controlled by available memory on this client and on server.
419 unsigned int ns_max_unused
;
420 /** Maximum allowed age (last used time) for locks in the LRU */
421 unsigned int ns_max_age
;
424 * Used to rate-limit ldlm_namespace_dump calls.
425 * \see ldlm_namespace_dump. Increased by 10 seconds every time
428 unsigned long ns_next_dump
;
430 /** "policy" function that does actual lock conflict determination */
431 ldlm_res_policy ns_policy
;
434 * LVB operations for this namespace.
435 * \see struct ldlm_valblock_ops
437 struct ldlm_valblock_ops
*ns_lvbo
;
440 * Used by filter code to store pointer to OBD of the service.
441 * Should be dropped in favor of \a ns_obd
446 * Wait queue used by __ldlm_namespace_free. Gets woken up every time
447 * a resource is removed.
449 wait_queue_head_t ns_waitq
;
450 /** LDLM pool structure for this namespace */
451 struct ldlm_pool ns_pool
;
452 /** Definition of how eagerly unused locks will be released from LRU */
453 ldlm_appetite_t ns_appetite
;
455 /** Limit of parallel AST RPC count. */
456 unsigned ns_max_parallel_ast
;
458 /** Callback to cancel locks before replaying it during recovery. */
459 ldlm_cancel_for_recovery ns_cancel_for_recovery
;
461 /** LDLM lock stats */
462 struct lprocfs_stats
*ns_stats
;
465 * Flag to indicate namespace is being freed. Used to determine if
466 * recalculation of LDLM pool statistics should be skipped.
468 unsigned ns_stopping
:1;
470 struct kobject ns_kobj
; /* sysfs object */
471 struct completion ns_kobj_unregister
;
475 * Returns 1 if namespace \a ns is a client namespace.
477 static inline int ns_is_client(struct ldlm_namespace
*ns
)
480 LASSERT(!(ns
->ns_client
& ~(LDLM_NAMESPACE_CLIENT
|
481 LDLM_NAMESPACE_SERVER
)));
482 LASSERT(ns
->ns_client
== LDLM_NAMESPACE_CLIENT
||
483 ns
->ns_client
== LDLM_NAMESPACE_SERVER
);
484 return ns
->ns_client
== LDLM_NAMESPACE_CLIENT
;
488 * Returns 1 if namespace \a ns is a server namespace.
490 static inline int ns_is_server(struct ldlm_namespace
*ns
)
493 LASSERT(!(ns
->ns_client
& ~(LDLM_NAMESPACE_CLIENT
|
494 LDLM_NAMESPACE_SERVER
)));
495 LASSERT(ns
->ns_client
== LDLM_NAMESPACE_CLIENT
||
496 ns
->ns_client
== LDLM_NAMESPACE_SERVER
);
497 return ns
->ns_client
== LDLM_NAMESPACE_SERVER
;
501 * Returns 1 if namespace \a ns supports early lock cancel (ELC).
503 static inline int ns_connect_cancelset(struct ldlm_namespace
*ns
)
506 return !!(ns
->ns_connect_flags
& OBD_CONNECT_CANCELSET
);
510 * Returns 1 if this namespace supports lru_resize.
512 static inline int ns_connect_lru_resize(struct ldlm_namespace
*ns
)
515 return !!(ns
->ns_connect_flags
& OBD_CONNECT_LRU_RESIZE
);
518 static inline void ns_register_cancel(struct ldlm_namespace
*ns
,
519 ldlm_cancel_for_recovery arg
)
522 ns
->ns_cancel_for_recovery
= arg
;
527 /** Type for blocking callback function of a lock. */
528 typedef int (*ldlm_blocking_callback
)(struct ldlm_lock
*lock
,
529 struct ldlm_lock_desc
*new, void *data
,
531 /** Type for completion callback function of a lock. */
532 typedef int (*ldlm_completion_callback
)(struct ldlm_lock
*lock
, __u64 flags
,
534 /** Type for glimpse callback function of a lock. */
535 typedef int (*ldlm_glimpse_callback
)(struct ldlm_lock
*lock
, void *data
);
537 /** Work list for sending GL ASTs to multiple locks. */
538 struct ldlm_glimpse_work
{
539 struct ldlm_lock
*gl_lock
; /* lock to glimpse */
540 struct list_head gl_list
; /* linkage to other gl work structs */
541 __u32 gl_flags
;/* see LDLM_GL_WORK_* below */
542 union ldlm_gl_desc
*gl_desc
; /* glimpse descriptor to be packed in
543 * glimpse callback request */
546 /** The ldlm_glimpse_work is allocated on the stack and should not be freed. */
547 #define LDLM_GL_WORK_NOFREE 0x1
549 /** Interval node data for each LDLM_EXTENT lock. */
550 struct ldlm_interval
{
551 struct interval_node li_node
; /* node for tree management */
552 struct list_head li_group
; /* the locks which have the same
553 * policy - group of the policy */
555 #define to_ldlm_interval(n) container_of(n, struct ldlm_interval, li_node)
558 * Interval tree for extent locks.
559 * The interval tree must be accessed under the resource lock.
560 * Interval trees are used for granted extent locks to speed up conflicts
561 * lookup. See ldlm/interval_tree.c for more details.
563 struct ldlm_interval_tree
{
566 ldlm_mode_t lit_mode
; /* lock mode */
567 struct interval_node
*lit_root
; /* actual ldlm_interval */
570 /** Whether to track references to exports by LDLM locks. */
571 #define LUSTRE_TRACKS_LOCK_EXP_REFS (0)
575 LCF_ASYNC
= 0x1, /* Cancel locks asynchronously. */
576 LCF_LOCAL
= 0x2, /* Cancel locks locally, not notifing server */
577 LCF_BL_AST
= 0x4, /* Cancel locks marked as LDLM_FL_BL_AST
579 } ldlm_cancel_flags_t
;
585 __u64 blocking_owner
;
586 struct obd_export
*blocking_export
;
587 /* Protected by the hash lock */
593 struct ldlm_extent l_extent
;
594 struct ldlm_flock l_flock
;
595 struct ldlm_inodebits l_inodebits
;
596 } ldlm_policy_data_t
;
598 void ldlm_convert_policy_to_wire(ldlm_type_t type
,
599 const ldlm_policy_data_t
*lpolicy
,
600 ldlm_wire_policy_data_t
*wpolicy
);
601 void ldlm_convert_policy_to_local(struct obd_export
*exp
, ldlm_type_t type
,
602 const ldlm_wire_policy_data_t
*wpolicy
,
603 ldlm_policy_data_t
*lpolicy
);
613 * LDLM lock structure
615 * Represents a single LDLM lock and its state in memory. Each lock is
616 * associated with a single ldlm_resource, the object which is being
617 * locked. There may be multiple ldlm_locks on a single resource,
618 * depending on the lock type and whether the locks are conflicting or
624 * When remote side wants to tell us about a lock, they address
625 * it by this opaque handle. The handle does not hold a
626 * reference on the ldlm_lock, so it can be safely passed to
627 * other threads or nodes. When the lock needs to be accessed
628 * from the handle, it is looked up again in the lock table, and
629 * may no longer exist.
631 * Must be first in the structure.
633 struct portals_handle l_handle
;
635 * Lock reference count.
636 * This is how many users have pointers to actual structure, so that
637 * we do not accidentally free lock structure that is in use.
641 * Internal spinlock protects l_resource. We should hold this lock
642 * first before taking res_lock.
646 * Pointer to actual resource this lock is in.
647 * ldlm_lock_change_resource() can change this.
649 struct ldlm_resource
*l_resource
;
651 * List item for client side LRU list.
652 * Protected by ns_lock in struct ldlm_namespace.
654 struct list_head l_lru
;
656 * Linkage to resource's lock queues according to current lock state.
657 * (could be granted, waiting or converting)
658 * Protected by lr_lock in struct ldlm_resource.
660 struct list_head l_res_link
;
662 * Tree node for ldlm_extent.
664 struct ldlm_interval
*l_tree_node
;
666 * Per export hash of locks.
667 * Protected by per-bucket exp->exp_lock_hash locks.
669 struct hlist_node l_exp_hash
;
671 * Per export hash of flock locks.
672 * Protected by per-bucket exp->exp_flock_hash locks.
674 struct hlist_node l_exp_flock_hash
;
677 * Protected by lr_lock.
679 ldlm_mode_t l_req_mode
;
681 * Granted mode, also protected by lr_lock.
683 ldlm_mode_t l_granted_mode
;
684 /** Lock completion handler pointer. Called when lock is granted. */
685 ldlm_completion_callback l_completion_ast
;
687 * Lock blocking AST handler pointer.
688 * It plays two roles:
689 * - as a notification of an attempt to queue a conflicting lock (once)
690 * - as a notification when the lock is being cancelled.
692 * As such it's typically called twice: once for the initial conflict
693 * and then once more when the last user went away and the lock is
694 * cancelled (could happen recursively).
696 ldlm_blocking_callback l_blocking_ast
;
698 * Lock glimpse handler.
699 * Glimpse handler is used to obtain LVB updates from a client by
702 ldlm_glimpse_callback l_glimpse_ast
;
706 * This is a pointer to actual client export for locks that were granted
707 * to clients. Used server-side.
709 struct obd_export
*l_export
;
711 * Lock connection export.
712 * Pointer to server export on a client.
714 struct obd_export
*l_conn_export
;
717 * Remote lock handle.
718 * If the lock is remote, this is the handle of the other side lock
721 struct lustre_handle l_remote_handle
;
724 * Representation of private data specific for a lock type.
725 * Examples are: extent range for extent lock or bitmask for ibits locks
727 ldlm_policy_data_t l_policy_data
;
730 * Lock state flags. Protected by lr_lock.
731 * \see lustre_dlm_flags.h where the bits are defined.
736 * Lock r/w usage counters.
737 * Protected by lr_lock.
742 * If the lock is granted, a process sleeps on this waitq to learn when
743 * it's no longer in use. If the lock is not granted, a process sleeps
744 * on this waitq to learn when it becomes granted.
746 wait_queue_head_t l_waitq
;
749 * Seconds. It will be updated if there is any activity related to
750 * the lock, e.g. enqueue the lock or send blocking AST.
752 unsigned long l_last_activity
;
755 * Time last used by e.g. being matched by lock match.
756 * Jiffies. Should be converted to time if needed.
758 unsigned long l_last_used
;
760 /** Originally requested extent for the extent lock. */
761 struct ldlm_extent l_req_extent
;
764 * Client-side-only members.
767 enum lvb_type l_lvb_type
;
770 * Temporary storage for a LVB received during an enqueue operation.
775 /** Private storage for lock user. Opaque to LDLM. */
779 * Server-side-only members.
783 * Connection cookie for the client originating the operation.
784 * Used by Commit on Share (COS) code. Currently only used for
785 * inodebits locks on MDS.
787 __u64 l_client_cookie
;
790 * List item for locks waiting for cancellation from clients.
791 * The lists this could be linked into are:
792 * waiting_locks_list (protected by waiting_locks_spinlock),
793 * then if the lock timed out, it is moved to
794 * expired_lock_thread.elt_expired_locks for further processing.
795 * Protected by elt_lock.
797 struct list_head l_pending_chain
;
800 * Set when lock is sent a blocking AST. Time in seconds when timeout
801 * is reached and client holding this lock could be evicted.
802 * This timeout could be further extended by e.g. certain IO activity
804 * \see ost_rw_prolong_locks
806 unsigned long l_callback_timeout
;
808 /** Local PID of process which created this lock. */
812 * Number of times blocking AST was sent for this lock.
813 * This is for debugging. Valid values are 0 and 1, if there is an
814 * attempt to send blocking AST more than once, an assertion would be
815 * hit. \see ldlm_work_bl_ast_lock
818 /** List item ldlm_add_ast_work_item() for case of blocking ASTs. */
819 struct list_head l_bl_ast
;
820 /** List item ldlm_add_ast_work_item() for case of completion ASTs. */
821 struct list_head l_cp_ast
;
822 /** For ldlm_add_ast_work_item() for "revoke" AST used in COS. */
823 struct list_head l_rk_ast
;
826 * Pointer to a conflicting lock that caused blocking AST to be sent
829 struct ldlm_lock
*l_blocking_lock
;
832 * Protected by lr_lock, linkages to "skip lists".
833 * For more explanations of skip lists see ldlm/ldlm_inodebits.c
835 struct list_head l_sl_mode
;
836 struct list_head l_sl_policy
;
838 /** Reference tracking structure to debug leaked locks. */
839 struct lu_ref l_reference
;
840 #if LUSTRE_TRACKS_LOCK_EXP_REFS
841 /* Debugging stuff for bug 20498, for tracking export references. */
842 /** number of export references taken */
844 /** link all locks referencing one export */
845 struct list_head l_exp_refs_link
;
846 /** referenced export object */
847 struct obd_export
*l_exp_refs_target
;
850 * export blocking dlm lock list, protected by
851 * l_export->exp_bl_list_lock.
852 * Lock order of waiting_lists_spinlock, exp_bl_list_lock and res lock
853 * is: res lock -> exp_bl_list_lock -> wanting_lists_spinlock.
855 struct list_head l_exp_list
;
859 * LDLM resource description.
860 * Basically, resource is a representation for a single object.
861 * Object has a name which is currently 4 64-bit integers. LDLM user is
862 * responsible for creation of a mapping between objects it wants to be
863 * protected and resource names.
865 * A resource can only hold locks of a single lock type, though there may be
866 * multiple ldlm_locks on a single resource, depending on the lock type and
867 * whether the locks are conflicting or not.
869 struct ldlm_resource
{
870 struct ldlm_ns_bucket
*lr_ns_bucket
;
873 * List item for list in namespace hash.
874 * protected by ns_lock
876 struct hlist_node lr_hash
;
878 /** Spinlock to protect locks under this resource. */
882 * protected by lr_lock
884 /** List of locks in granted state */
885 struct list_head lr_granted
;
886 /** List of locks waiting to change their granted mode (converted) */
887 struct list_head lr_converting
;
889 * List of locks that could not be granted due to conflicts and
890 * that are waiting for conflicts to go away */
891 struct list_head lr_waiting
;
894 /* XXX No longer needed? Remove ASAP */
895 ldlm_mode_t lr_most_restr
;
897 /** Type of locks this resource can hold. Only one type per resource. */
898 ldlm_type_t lr_type
; /* LDLM_{PLAIN,EXTENT,FLOCK,IBITS} */
901 struct ldlm_res_id lr_name
;
902 /** Reference count for this resource */
903 atomic_t lr_refcount
;
906 * Interval trees (only for extent locks) for all modes of this resource
908 struct ldlm_interval_tree lr_itree
[LCK_MODE_NUM
];
911 * Server-side-only lock value block elements.
912 * To serialize lvbo_init.
914 struct mutex lr_lvb_mutex
;
916 /** protected by lr_lock */
919 /** When the resource was considered as contended. */
920 unsigned long lr_contention_time
;
921 /** List of references to this resource. For debugging. */
922 struct lu_ref lr_reference
;
924 struct inode
*lr_lvb_inode
;
927 static inline bool ldlm_has_layout(struct ldlm_lock
*lock
)
929 return lock
->l_resource
->lr_type
== LDLM_IBITS
&&
930 lock
->l_policy_data
.l_inodebits
.bits
& MDS_INODELOCK_LAYOUT
;
934 ldlm_ns_name(struct ldlm_namespace
*ns
)
936 return ns
->ns_rs_hash
->hs_name
;
939 static inline struct ldlm_namespace
*
940 ldlm_res_to_ns(struct ldlm_resource
*res
)
942 return res
->lr_ns_bucket
->nsb_namespace
;
945 static inline struct ldlm_namespace
*
946 ldlm_lock_to_ns(struct ldlm_lock
*lock
)
948 return ldlm_res_to_ns(lock
->l_resource
);
952 ldlm_lock_to_ns_name(struct ldlm_lock
*lock
)
954 return ldlm_ns_name(ldlm_lock_to_ns(lock
));
957 static inline struct adaptive_timeout
*
958 ldlm_lock_to_ns_at(struct ldlm_lock
*lock
)
960 return &lock
->l_resource
->lr_ns_bucket
->nsb_at_estimate
;
963 static inline int ldlm_lvbo_init(struct ldlm_resource
*res
)
965 struct ldlm_namespace
*ns
= ldlm_res_to_ns(res
);
967 if (ns
->ns_lvbo
!= NULL
&& ns
->ns_lvbo
->lvbo_init
!= NULL
)
968 return ns
->ns_lvbo
->lvbo_init(res
);
973 static inline int ldlm_lvbo_size(struct ldlm_lock
*lock
)
975 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
977 if (ns
->ns_lvbo
!= NULL
&& ns
->ns_lvbo
->lvbo_size
!= NULL
)
978 return ns
->ns_lvbo
->lvbo_size(lock
);
983 static inline int ldlm_lvbo_fill(struct ldlm_lock
*lock
, void *buf
, int len
)
985 struct ldlm_namespace
*ns
= ldlm_lock_to_ns(lock
);
987 if (ns
->ns_lvbo
!= NULL
) {
988 LASSERT(ns
->ns_lvbo
->lvbo_fill
!= NULL
);
989 return ns
->ns_lvbo
->lvbo_fill(lock
, buf
, len
);
994 struct ldlm_ast_work
{
995 struct ldlm_lock
*w_lock
;
997 struct ldlm_lock_desc w_desc
;
998 struct list_head w_list
;
1005 * Common ldlm_enqueue parameters
1007 struct ldlm_enqueue_info
{
1008 __u32 ei_type
; /** Type of the lock being enqueued. */
1009 __u32 ei_mode
; /** Mode of the lock being enqueued. */
1010 void *ei_cb_bl
; /** blocking lock callback */
1011 void *ei_cb_cp
; /** lock completion callback */
1012 void *ei_cb_gl
; /** lock glimpse callback */
1013 void *ei_cbdata
; /** Data to be passed into callbacks. */
1016 extern struct obd_ops ldlm_obd_ops
;
1018 extern char *ldlm_lockname
[];
1019 extern char *ldlm_typename
[];
1020 extern char *ldlm_it2str(int it
);
1023 * Just a fancy CDEBUG call with log level preset to LDLM_DEBUG.
1024 * For the cases where we do not have actual lock to print along
1025 * with a debugging message that is ldlm-related
1027 #define LDLM_DEBUG_NOLOCK(format, a...) \
1028 CDEBUG(D_DLMTRACE, "### " format "\n" , ##a)
1031 * Support function for lock information printing into debug logs.
1034 #define ldlm_lock_debug(msgdata, mask, cdls, lock, fmt, a...) do { \
1035 CFS_CHECK_STACK(msgdata, mask, cdls); \
1037 if (((mask) & D_CANTMASK) != 0 || \
1038 ((libcfs_debug & (mask)) != 0 && \
1039 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
1040 _ldlm_lock_debug(lock, msgdata, fmt, ##a); \
1043 void _ldlm_lock_debug(struct ldlm_lock
*lock
,
1044 struct libcfs_debug_msg_data
*data
,
1045 const char *fmt
, ...)
1049 * Rate-limited version of lock printing function.
1051 #define LDLM_DEBUG_LIMIT(mask, lock, fmt, a...) do { \
1052 static struct cfs_debug_limit_state _ldlm_cdls; \
1053 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, mask, &_ldlm_cdls); \
1054 ldlm_lock_debug(&msgdata, mask, &_ldlm_cdls, lock, "### " fmt , ##a);\
1057 #define LDLM_ERROR(lock, fmt, a...) LDLM_DEBUG_LIMIT(D_ERROR, lock, fmt, ## a)
1058 #define LDLM_WARN(lock, fmt, a...) LDLM_DEBUG_LIMIT(D_WARNING, lock, fmt, ## a)
1060 /** Non-rate-limited lock printing function for debugging purposes. */
1061 #define LDLM_DEBUG(lock, fmt, a...) do { \
1062 if (likely(lock != NULL)) { \
1063 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_DLMTRACE, NULL); \
1064 ldlm_lock_debug(&msgdata, D_DLMTRACE, NULL, lock, \
1065 "### " fmt , ##a); \
1067 LDLM_DEBUG_NOLOCK("no dlm lock: " fmt, ##a); \
1071 typedef int (*ldlm_processing_policy
)(struct ldlm_lock
*lock
, __u64
*flags
,
1072 int first_enq
, ldlm_error_t
*err
,
1073 struct list_head
*work_list
);
1076 * Return values for lock iterators.
1077 * Also used during deciding of lock grants and cancellations.
1079 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
1080 #define LDLM_ITER_STOP 2 /* stop iterating */
1082 typedef int (*ldlm_iterator_t
)(struct ldlm_lock
*, void *);
1083 typedef int (*ldlm_res_iterator_t
)(struct ldlm_resource
*, void *);
1085 /** \defgroup ldlm_iterator Lock iterators
1087 * LDLM provides for a way to iterate through every lock on a resource or
1088 * namespace or every resource in a namespace.
1090 int ldlm_resource_foreach(struct ldlm_resource
*res
, ldlm_iterator_t iter
,
1092 void ldlm_namespace_foreach(struct ldlm_namespace
*ns
, ldlm_iterator_t iter
,
1094 int ldlm_resource_iterate(struct ldlm_namespace
*, const struct ldlm_res_id
*,
1095 ldlm_iterator_t iter
, void *data
);
1096 /** @} ldlm_iterator */
1098 int ldlm_replay_locks(struct obd_import
*imp
);
1101 int ldlm_flock_completion_ast(struct ldlm_lock
*lock
, __u64 flags
, void *data
);
1104 __u64
ldlm_extent_shift_kms(struct ldlm_lock
*lock
, __u64 old_kms
);
1106 struct ldlm_callback_suite
{
1107 ldlm_completion_callback lcs_completion
;
1108 ldlm_blocking_callback lcs_blocking
;
1109 ldlm_glimpse_callback lcs_glimpse
;
1113 int ldlm_del_waiting_lock(struct ldlm_lock
*lock
);
1114 int ldlm_refresh_waiting_lock(struct ldlm_lock
*lock
, int timeout
);
1115 int ldlm_get_ref(void);
1116 void ldlm_put_ref(void);
1117 int ldlm_init_export(struct obd_export
*exp
);
1118 void ldlm_destroy_export(struct obd_export
*exp
);
1119 struct ldlm_lock
*ldlm_request_lock(struct ptlrpc_request
*req
);
1122 void ldlm_register_intent(struct ldlm_namespace
*ns
, ldlm_res_policy arg
);
1123 void ldlm_lock2handle(const struct ldlm_lock
*lock
,
1124 struct lustre_handle
*lockh
);
1125 struct ldlm_lock
*__ldlm_handle2lock(const struct lustre_handle
*, __u64 flags
);
1126 void ldlm_cancel_callback(struct ldlm_lock
*);
1127 int ldlm_lock_remove_from_lru(struct ldlm_lock
*);
1128 int ldlm_lock_set_data(struct lustre_handle
*, void *);
1131 * Obtain a lock reference by its handle.
1133 static inline struct ldlm_lock
*ldlm_handle2lock(const struct lustre_handle
*h
)
1135 return __ldlm_handle2lock(h
, 0);
1138 #define LDLM_LOCK_REF_DEL(lock) \
1139 lu_ref_del(&lock->l_reference, "handle", current)
1141 static inline struct ldlm_lock
*
1142 ldlm_handle2lock_long(const struct lustre_handle
*h
, __u64 flags
)
1144 struct ldlm_lock
*lock
;
1146 lock
= __ldlm_handle2lock(h
, flags
);
1148 LDLM_LOCK_REF_DEL(lock
);
1153 * Update Lock Value Block Operations (LVBO) on a resource taking into account
1154 * data from request \a r
1156 static inline int ldlm_res_lvbo_update(struct ldlm_resource
*res
,
1157 struct ptlrpc_request
*r
, int increase
)
1159 if (ldlm_res_to_ns(res
)->ns_lvbo
&&
1160 ldlm_res_to_ns(res
)->ns_lvbo
->lvbo_update
) {
1161 return ldlm_res_to_ns(res
)->ns_lvbo
->lvbo_update(res
, r
,
1167 int ldlm_error2errno(ldlm_error_t error
);
1168 ldlm_error_t
ldlm_errno2error(int err_no
); /* don't call it `errno': this
1169 * confuses user-space. */
1170 #if LUSTRE_TRACKS_LOCK_EXP_REFS
1171 void ldlm_dump_export_locks(struct obd_export
*exp
);
1175 * Release a temporary lock reference obtained by ldlm_handle2lock() or
1176 * __ldlm_handle2lock().
1178 #define LDLM_LOCK_PUT(lock) \
1180 LDLM_LOCK_REF_DEL(lock); \
1181 /*LDLM_DEBUG((lock), "put");*/ \
1182 ldlm_lock_put(lock); \
1186 * Release a lock reference obtained by some other means (see
1189 #define LDLM_LOCK_RELEASE(lock) \
1191 /*LDLM_DEBUG((lock), "put");*/ \
1192 ldlm_lock_put(lock); \
1195 #define LDLM_LOCK_GET(lock) \
1197 ldlm_lock_get(lock); \
1198 /*LDLM_DEBUG((lock), "get");*/ \
1202 #define ldlm_lock_list_put(head, member, count) \
1204 struct ldlm_lock *_lock, *_next; \
1206 list_for_each_entry_safe(_lock, _next, head, member) { \
1209 list_del_init(&_lock->member); \
1210 LDLM_LOCK_RELEASE(_lock); \
1215 struct ldlm_lock
*ldlm_lock_get(struct ldlm_lock
*lock
);
1216 void ldlm_lock_put(struct ldlm_lock
*lock
);
1217 void ldlm_lock_destroy(struct ldlm_lock
*lock
);
1218 void ldlm_lock2desc(struct ldlm_lock
*lock
, struct ldlm_lock_desc
*desc
);
1219 void ldlm_lock_addref(struct lustre_handle
*lockh
, __u32 mode
);
1220 int ldlm_lock_addref_try(struct lustre_handle
*lockh
, __u32 mode
);
1221 void ldlm_lock_decref(struct lustre_handle
*lockh
, __u32 mode
);
1222 void ldlm_lock_decref_and_cancel(struct lustre_handle
*lockh
, __u32 mode
);
1223 void ldlm_lock_fail_match_locked(struct ldlm_lock
*lock
);
1224 void ldlm_lock_fail_match(struct ldlm_lock
*lock
);
1225 void ldlm_lock_allow_match(struct ldlm_lock
*lock
);
1226 void ldlm_lock_allow_match_locked(struct ldlm_lock
*lock
);
1227 ldlm_mode_t
ldlm_lock_match(struct ldlm_namespace
*ns
, __u64 flags
,
1228 const struct ldlm_res_id
*, ldlm_type_t type
,
1229 ldlm_policy_data_t
*, ldlm_mode_t mode
,
1230 struct lustre_handle
*, int unref
);
1231 ldlm_mode_t
ldlm_revalidate_lock_handle(struct lustre_handle
*lockh
,
1233 struct ldlm_resource
*ldlm_lock_convert(struct ldlm_lock
*lock
, int new_mode
,
1235 void ldlm_lock_downgrade(struct ldlm_lock
*lock
, int new_mode
);
1236 void ldlm_lock_cancel(struct ldlm_lock
*lock
);
1237 void ldlm_reprocess_all(struct ldlm_resource
*res
);
1238 void ldlm_reprocess_all_ns(struct ldlm_namespace
*ns
);
1239 void ldlm_lock_dump_handle(int level
, struct lustre_handle
*);
1240 void ldlm_unlink_lock_skiplist(struct ldlm_lock
*req
);
1243 struct ldlm_namespace
*
1244 ldlm_namespace_new(struct obd_device
*obd
, char *name
,
1245 ldlm_side_t client
, ldlm_appetite_t apt
,
1246 ldlm_ns_type_t ns_type
);
1247 int ldlm_namespace_cleanup(struct ldlm_namespace
*ns
, __u64 flags
);
1248 void ldlm_namespace_free(struct ldlm_namespace
*ns
,
1249 struct obd_import
*imp
, int force
);
1250 void ldlm_namespace_register(struct ldlm_namespace
*ns
, ldlm_side_t client
);
1251 void ldlm_namespace_unregister(struct ldlm_namespace
*ns
, ldlm_side_t client
);
1252 void ldlm_namespace_get(struct ldlm_namespace
*ns
);
1253 void ldlm_namespace_put(struct ldlm_namespace
*ns
);
1254 int ldlm_debugfs_setup(void);
1255 void ldlm_debugfs_cleanup(void);
1257 /* resource.c - internal */
1258 struct ldlm_resource
*ldlm_resource_get(struct ldlm_namespace
*ns
,
1259 struct ldlm_resource
*parent
,
1260 const struct ldlm_res_id
*,
1261 ldlm_type_t type
, int create
);
1262 struct ldlm_resource
*ldlm_resource_getref(struct ldlm_resource
*res
);
1263 int ldlm_resource_putref(struct ldlm_resource
*res
);
1264 void ldlm_resource_add_lock(struct ldlm_resource
*res
,
1265 struct list_head
*head
,
1266 struct ldlm_lock
*lock
);
1267 void ldlm_resource_unlink_lock(struct ldlm_lock
*lock
);
1268 void ldlm_res2desc(struct ldlm_resource
*res
, struct ldlm_resource_desc
*desc
);
1269 void ldlm_dump_all_namespaces(ldlm_side_t client
, int level
);
1270 void ldlm_namespace_dump(int level
, struct ldlm_namespace
*);
1271 void ldlm_resource_dump(int level
, struct ldlm_resource
*);
1272 int ldlm_lock_change_resource(struct ldlm_namespace
*, struct ldlm_lock
*,
1273 const struct ldlm_res_id
*);
1275 #define LDLM_RESOURCE_ADDREF(res) do { \
1276 lu_ref_add_atomic(&(res)->lr_reference, __func__, current); \
1279 #define LDLM_RESOURCE_DELREF(res) do { \
1280 lu_ref_del(&(res)->lr_reference, __func__, current); \
1283 /* ldlm_request.c */
1284 int ldlm_expired_completion_wait(void *data
);
1285 /** \defgroup ldlm_local_ast Default AST handlers for local locks
1286 * These AST handlers are typically used for server-side local locks and are
1287 * also used by client-side lock handlers to perform minimum level base
1290 int ldlm_blocking_ast_nocheck(struct ldlm_lock
*lock
);
1291 int ldlm_blocking_ast(struct ldlm_lock
*lock
, struct ldlm_lock_desc
*desc
,
1292 void *data
, int flag
);
1293 int ldlm_glimpse_ast(struct ldlm_lock
*lock
, void *reqp
);
1294 int ldlm_completion_ast_async(struct ldlm_lock
*lock
, __u64 flags
, void *data
);
1295 int ldlm_completion_ast(struct ldlm_lock
*lock
, __u64 flags
, void *data
);
1296 /** @} ldlm_local_ast */
1298 /** \defgroup ldlm_cli_api API to operate on locks from actual LDLM users.
1299 * These are typically used by client and server (*_local versions)
1300 * to obtain and release locks.
1302 int ldlm_cli_enqueue(struct obd_export
*exp
, struct ptlrpc_request
**reqp
,
1303 struct ldlm_enqueue_info
*einfo
,
1304 const struct ldlm_res_id
*res_id
,
1305 ldlm_policy_data_t
const *policy
, __u64
*flags
,
1306 void *lvb
, __u32 lvb_len
, enum lvb_type lvb_type
,
1307 struct lustre_handle
*lockh
, int async
);
1308 int ldlm_prep_enqueue_req(struct obd_export
*exp
,
1309 struct ptlrpc_request
*req
,
1310 struct list_head
*cancels
,
1312 int ldlm_prep_elc_req(struct obd_export
*exp
,
1313 struct ptlrpc_request
*req
,
1314 int version
, int opc
, int canceloff
,
1315 struct list_head
*cancels
, int count
);
1317 struct ptlrpc_request
*ldlm_enqueue_pack(struct obd_export
*exp
, int lvb_len
);
1318 int ldlm_handle_enqueue0(struct ldlm_namespace
*ns
, struct ptlrpc_request
*req
,
1319 const struct ldlm_request
*dlm_req
,
1320 const struct ldlm_callback_suite
*cbs
);
1321 int ldlm_cli_enqueue_fini(struct obd_export
*exp
, struct ptlrpc_request
*req
,
1322 ldlm_type_t type
, __u8 with_policy
, ldlm_mode_t mode
,
1323 __u64
*flags
, void *lvb
, __u32 lvb_len
,
1324 struct lustre_handle
*lockh
, int rc
);
1325 int ldlm_cli_enqueue_local(struct ldlm_namespace
*ns
,
1326 const struct ldlm_res_id
*res_id
,
1327 ldlm_type_t type
, ldlm_policy_data_t
*policy
,
1328 ldlm_mode_t mode
, __u64
*flags
,
1329 ldlm_blocking_callback blocking
,
1330 ldlm_completion_callback completion
,
1331 ldlm_glimpse_callback glimpse
,
1332 void *data
, __u32 lvb_len
, enum lvb_type lvb_type
,
1333 const __u64
*client_cookie
,
1334 struct lustre_handle
*lockh
);
1335 int ldlm_server_ast(struct lustre_handle
*lockh
, struct ldlm_lock_desc
*new,
1336 void *data
, __u32 data_len
);
1337 int ldlm_cli_convert(struct lustre_handle
*, int new_mode
, __u32
*flags
);
1338 int ldlm_cli_update_pool(struct ptlrpc_request
*req
);
1339 int ldlm_cli_cancel(struct lustre_handle
*lockh
,
1340 ldlm_cancel_flags_t cancel_flags
);
1341 int ldlm_cli_cancel_unused(struct ldlm_namespace
*, const struct ldlm_res_id
*,
1342 ldlm_cancel_flags_t flags
, void *opaque
);
1343 int ldlm_cli_cancel_unused_resource(struct ldlm_namespace
*ns
,
1344 const struct ldlm_res_id
*res_id
,
1345 ldlm_policy_data_t
*policy
,
1347 ldlm_cancel_flags_t flags
,
1349 int ldlm_cli_cancel_req(struct obd_export
*exp
, struct list_head
*head
,
1350 int count
, ldlm_cancel_flags_t flags
);
1351 int ldlm_cancel_resource_local(struct ldlm_resource
*res
,
1352 struct list_head
*cancels
,
1353 ldlm_policy_data_t
*policy
,
1354 ldlm_mode_t mode
, __u64 lock_flags
,
1355 ldlm_cancel_flags_t cancel_flags
, void *opaque
);
1356 int ldlm_cli_cancel_list_local(struct list_head
*cancels
, int count
,
1357 ldlm_cancel_flags_t flags
);
1358 int ldlm_cli_cancel_list(struct list_head
*head
, int count
,
1359 struct ptlrpc_request
*req
, ldlm_cancel_flags_t flags
);
1360 /** @} ldlm_cli_api */
1363 /* This has to be here because recursive inclusion sucks. */
1364 int intent_disposition(struct ldlm_reply
*rep
, int flag
);
1365 void intent_set_disposition(struct ldlm_reply
*rep
, int flag
);
1368 /* ioctls for trying requests */
1369 #define IOC_LDLM_TYPE 'f'
1370 #define IOC_LDLM_MIN_NR 40
1372 #define IOC_LDLM_TEST _IOWR('f', 40, long)
1373 #define IOC_LDLM_DUMP _IOWR('f', 41, long)
1374 #define IOC_LDLM_REGRESS_START _IOWR('f', 42, long)
1375 #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
1376 #define IOC_LDLM_MAX_NR 43
1379 * "Modes" of acquiring lock_res, necessary to tell lockdep that taking more
1380 * than one lock_res is dead-lock safe.
1382 enum lock_res_type
{
1387 /** Lock resource. */
1388 static inline void lock_res(struct ldlm_resource
*res
)
1390 spin_lock(&res
->lr_lock
);
1393 /** Lock resource with a way to instruct lockdep code about nestedness-safe. */
1394 static inline void lock_res_nested(struct ldlm_resource
*res
,
1395 enum lock_res_type mode
)
1397 spin_lock_nested(&res
->lr_lock
, mode
);
1400 /** Unlock resource. */
1401 static inline void unlock_res(struct ldlm_resource
*res
)
1403 spin_unlock(&res
->lr_lock
);
1406 /** Check if resource is already locked, assert if not. */
1407 static inline void check_res_locked(struct ldlm_resource
*res
)
1409 assert_spin_locked(&res
->lr_lock
);
1412 struct ldlm_resource
*lock_res_and_lock(struct ldlm_lock
*lock
);
1413 void unlock_res_and_lock(struct ldlm_lock
*lock
);
1416 /** \defgroup ldlm_pools Various LDLM pool related functions
1417 * There are not used outside of ldlm.
1420 int ldlm_pools_recalc(ldlm_side_t client
);
1421 int ldlm_pools_init(void);
1422 void ldlm_pools_fini(void);
1424 int ldlm_pool_init(struct ldlm_pool
*pl
, struct ldlm_namespace
*ns
,
1425 int idx
, ldlm_side_t client
);
1426 int ldlm_pool_shrink(struct ldlm_pool
*pl
, int nr
,
1428 void ldlm_pool_fini(struct ldlm_pool
*pl
);
1429 int ldlm_pool_setup(struct ldlm_pool
*pl
, int limit
);
1430 int ldlm_pool_recalc(struct ldlm_pool
*pl
);
1431 __u32
ldlm_pool_get_lvf(struct ldlm_pool
*pl
);
1432 __u64
ldlm_pool_get_slv(struct ldlm_pool
*pl
);
1433 __u64
ldlm_pool_get_clv(struct ldlm_pool
*pl
);
1434 __u32
ldlm_pool_get_limit(struct ldlm_pool
*pl
);
1435 void ldlm_pool_set_slv(struct ldlm_pool
*pl
, __u64 slv
);
1436 void ldlm_pool_set_clv(struct ldlm_pool
*pl
, __u64 clv
);
1437 void ldlm_pool_set_limit(struct ldlm_pool
*pl
, __u32 limit
);
1438 void ldlm_pool_add(struct ldlm_pool
*pl
, struct ldlm_lock
*lock
);
1439 void ldlm_pool_del(struct ldlm_pool
*pl
, struct ldlm_lock
*lock
);