1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * (visit-tags-table FILE)
3 * vim:expandtab:shiftwidth=8:tabstop=8:
6 #ifndef _LUSTRE_DLM_H__
7 #define _LUSTRE_DLM_H__
10 #include <linux/lustre_dlm.h>
11 #elif defined(__APPLE__)
12 #include <darwin/lustre_dlm.h>
13 #elif defined(__WINNT__)
14 #include <winnt/lustre_dlm.h>
16 #error Unsupported operating system.
19 #include <lustre_lib.h>
20 #include <lustre_net.h>
21 #include <lustre_import.h>
22 #include <lustre_handles.h>
23 #include <lustre_export.h> /* for obd_export, for LDLM_DEBUG */
28 #define OBD_LDLM_DEVICENAME "ldlm"
30 #define LDLM_DEFAULT_LRU_SIZE (100 * smp_num_cpus)
31 #define LDLM_DEFAULT_MAX_ALIVE (cfs_time_seconds(36000))
36 ELDLM_LOCK_CHANGED = 300,
37 ELDLM_LOCK_ABORTED = 301,
38 ELDLM_LOCK_REPLACED = 302,
39 ELDLM_NO_LOCK_DATA = 303,
41 ELDLM_NAMESPACE_EXISTS = 400,
42 ELDLM_BAD_NAMESPACE = 401
45 #define LDLM_NAMESPACE_SERVER 0
46 #define LDLM_NAMESPACE_CLIENT 1
48 #define LDLM_FL_LOCK_CHANGED 0x000001 /* extent, mode, or resource changed */
50 /* If the server returns one of these flags, then the lock was put on that list.
51 * If the client sends one of these flags (during recovery ONLY!), it wants the
52 * lock added to the specified list, no questions asked. -p */
53 #define LDLM_FL_BLOCK_GRANTED 0x000002
54 #define LDLM_FL_BLOCK_CONV 0x000004
55 #define LDLM_FL_BLOCK_WAIT 0x000008
57 #define LDLM_FL_CBPENDING 0x000010 /* this lock is being destroyed */
58 #define LDLM_FL_AST_SENT 0x000020 /* blocking or cancel packet was sent */
59 #define LDLM_FL_WAIT_NOREPROC 0x000040 /* not a real flag, not saved in lock */
60 #define LDLM_FL_CANCEL 0x000080 /* cancellation callback already run */
62 /* Lock is being replayed. This could probably be implied by the fact that one
63 * of BLOCK_{GRANTED,CONV,WAIT} is set, but that is pretty dangerous. */
64 #define LDLM_FL_REPLAY 0x000100
66 #define LDLM_FL_INTENT_ONLY 0x000200 /* don't grant lock, just do intent */
67 #define LDLM_FL_LOCAL_ONLY 0x000400 /* see ldlm_cli_cancel_unused */
69 /* don't run the cancel callback under ldlm_cli_cancel_unused */
70 #define LDLM_FL_FAILED 0x000800
72 #define LDLM_FL_HAS_INTENT 0x001000 /* lock request has intent */
73 #define LDLM_FL_CANCELING 0x002000 /* lock cancel has already been sent */
74 #define LDLM_FL_LOCAL 0x004000 /* local lock (ie, no srv/cli split) */
75 #define LDLM_FL_WARN 0x008000 /* see ldlm_cli_cancel_unused */
76 #define LDLM_FL_DISCARD_DATA 0x010000 /* discard (no writeback) on cancel */
78 #define LDLM_FL_NO_TIMEOUT 0x020000 /* Blocked by group lock - wait
81 /* file & record locking */
82 #define LDLM_FL_BLOCK_NOWAIT 0x040000 // server told not to wait if blocked
83 #define LDLM_FL_TEST_LOCK 0x080000 // return blocking lock
85 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
86 * the LVB filling happens _after_ the lock has been granted, so another thread
87 * can match`t before the LVB has been updated. As a dirty hack, we set
88 * LDLM_FL_LVB_READY only after we've done the LVB poop.
89 * this is only needed on lov/osc now, where lvb is actually used and callers
90 * must set it in input flags.
92 * The proper fix is to do the granting inside of the completion AST, which can
93 * be replaced with a LVB-aware wrapping function for OSC locks. That change is
94 * pretty high-risk, though, and would need a lot more testing. */
96 #define LDLM_FL_LVB_READY 0x100000
98 /* A lock contributes to the kms calculation until it has finished the part
99 * of it's cancelation that performs write back on its dirty pages. It
100 * can remain on the granted list during this whole time. Threads racing
101 * to update the kms after performing their writeback need to know to
102 * exclude each others locks from the calculation as they walk the granted
104 #define LDLM_FL_KMS_IGNORE 0x200000
106 /* Don't drop lock covering mmapped file in LRU */
107 #define LDLM_FL_NO_LRU 0x400000
109 /* Immediatelly cancel such locks when they block some other locks. Send
110 cancel notification to original lock holder, but expect no reply. */
111 #define LDLM_FL_CANCEL_ON_BLOCK 0x800000
113 /* Flags flags inherited from parent lock when doing intents. */
114 #define LDLM_INHERIT_FLAGS (LDLM_FL_CANCEL_ON_BLOCK)
116 /* These are flags that are mapped into the flags and ASTs of blocking locks */
117 #define LDLM_AST_DISCARD_DATA 0x80000000 /* Add FL_DISCARD to blocking ASTs */
118 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
119 #define LDLM_AST_FLAGS (LDLM_FL_DISCARD_DATA)
121 /* completion ast to be executed */
122 #define LDLM_FL_CP_REQD 0x1000000
124 /* cleanup_resource has already handled the lock */
125 #define LDLM_FL_CLEANED 0x2000000
127 /* optimization hint: LDLM can run blocking callback from current context
128 * w/o involving separate thread. in order to decrease cs rate */
129 #define LDLM_FL_ATOMIC_CB 0x4000000
131 /* Cancel lock asynchronously. See ldlm_cli_cancel_unused_resource. */
132 #define LDLM_FL_ASYNC 0x20000000
134 /* The blocking callback is overloaded to perform two functions. These flags
135 * indicate which operation should be performed. */
136 #define LDLM_CB_BLOCKING 1
137 #define LDLM_CB_CANCELING 2
139 /* position flag of skip list pointers */
140 #define LDLM_SL_HEAD(skip_list) ((skip_list)->next != NULL)
141 #define LDLM_SL_TAIL(skip_list) ((skip_list)->prev != NULL)
142 #define LDLM_SL_EMPTY(skip_list) ((skip_list)->next == NULL && \
143 (skip_list)->prev == NULL)
145 /* compatibility matrix */
146 #define LCK_COMPAT_EX LCK_NL
147 #define LCK_COMPAT_PW (LCK_COMPAT_EX | LCK_CR)
148 #define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
149 #define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
150 #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
151 #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX | LCK_GROUP)
152 #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
154 extern ldlm_mode_t lck_compat_array[];
156 static inline void lockmode_verify(ldlm_mode_t mode)
158 LASSERT(mode > LCK_MINMODE && mode < LCK_MAXMODE);
161 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
163 return (lck_compat_array[exist] & new);
168 * cluster name spaces
172 #define DLM_OST_NAMESPACE 1
173 #define DLM_MDS_NAMESPACE 2
176 - do we just separate this by security domains and use a prefix for
177 multiple namespaces in the same domain?
187 * waiting_locks_spinlock
201 struct ldlm_resource;
202 struct ldlm_namespace;
204 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
205 void *req_cookie, ldlm_mode_t mode, int flags,
208 struct ldlm_valblock_ops {
209 int (*lvbo_init)(struct ldlm_resource *res);
210 int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
211 int buf_idx, int increase);
214 struct ldlm_namespace {
216 __u32 ns_client; /* is this a client-side lock tree? */
217 struct list_head *ns_hash; /* hash table for ns */
218 spinlock_t ns_hash_lock;
219 __u32 ns_refcount; /* count of resources in the hash */
220 struct list_head ns_root_list; /* all root resources in ns */
221 struct list_head ns_list_chain; /* position in global NS list */
223 struct list_head ns_unused_list; /* all root resources in ns */
225 spinlock_t ns_unused_lock;
227 unsigned int ns_max_unused;
228 unsigned int ns_max_age;
229 cfs_time_t ns_next_dump; /* next debug dump, jiffies */
233 ldlm_res_policy ns_policy;
234 struct ldlm_valblock_ops *ns_lvbo;
236 cfs_waitq_t ns_waitq;
241 * Resource hash table
245 #define RES_HASH_BITS 10
246 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
247 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
251 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
252 struct ldlm_lock_desc *new, void *data,
254 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
256 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
259 struct portals_handle l_handle; // must be first in the structure
262 /* internal spinlock protects l_resource. we should hold this lock
263 * first before grabbing res_lock.*/
266 /* ldlm_lock_change_resource() can change this */
267 struct ldlm_resource *l_resource;
269 /* protected by ns_hash_lock. FIXME */
270 struct list_head l_lru;
272 /* protected by lr_lock */
273 struct list_head l_res_link; // position in one of three res lists
275 struct list_head l_sl_mode; // skip pointer for request mode
276 struct list_head l_sl_policy; // skip pointer for inodebits
278 /* protected by led_lock */
279 struct list_head l_export_chain; // per-export chain of locks
281 /* protected by lr_lock */
282 ldlm_mode_t l_req_mode;
283 ldlm_mode_t l_granted_mode;
285 ldlm_completion_callback l_completion_ast;
286 ldlm_blocking_callback l_blocking_ast;
287 ldlm_glimpse_callback l_glimpse_ast;
289 struct obd_export *l_export;
290 struct obd_export *l_conn_export;
292 struct lustre_handle l_remote_handle;
293 ldlm_policy_data_t l_policy_data;
295 /* protected by lr_lock */
301 /* If the lock is granted, a process sleeps on this waitq to learn when
302 * it's no longer in use. If the lock is not granted, a process sleeps
303 * on this waitq to learn when it becomes granted. */
305 struct timeval l_enqueued_time;
307 cfs_time_t l_last_used; /* jiffies */
308 struct ldlm_extent l_req_extent;
310 /* Client-side-only members */
311 __u32 l_lvb_len; /* temporary storage for */
312 void *l_lvb_data; /* an LVB received during */
313 void *l_lvb_swabber; /* an enqueue */
316 /* Server-side-only members */
318 /* protected by elt_lock */
319 struct list_head l_pending_chain; /* callbacks pending */
320 cfs_time_t l_callback_timeout; /* jiffies */
322 __u32 l_pid; /* pid which created this lock */
324 /* for ldlm_add_ast_work_item() */
325 struct list_head l_bl_ast;
326 struct list_head l_cp_ast;
327 struct ldlm_lock *l_blocking_lock;
331 struct ldlm_resource {
332 struct ldlm_namespace *lr_namespace;
334 /* protected by ns_hash_lock */
335 struct list_head lr_hash;
336 struct ldlm_resource *lr_parent; /* 0 for a root resource */
337 struct list_head lr_children; /* list head for child resources */
338 struct list_head lr_childof; /* part of ns_root_list if root res,
339 * part of lr_children if child */
342 /* protected by lr_lock */
343 struct list_head lr_granted;
344 struct list_head lr_converting;
345 struct list_head lr_waiting;
346 ldlm_mode_t lr_most_restr;
347 ldlm_type_t lr_type; /* LDLM_{PLAIN,EXTENT,FLOCK} */
348 struct ldlm_res_id lr_name;
349 atomic_t lr_refcount;
351 /* Server-side-only lock value block elements */
352 struct semaphore lr_lvb_sem;
357 struct ldlm_ast_work {
358 struct ldlm_lock *w_lock;
360 struct ldlm_lock_desc w_desc;
361 struct list_head w_list;
367 extern struct obd_ops ldlm_obd_ops;
369 extern char *ldlm_lockname[];
370 extern char *ldlm_typename[];
371 extern char *ldlm_it2str(int it);
373 #define ldlm_lock_debug(cdls, level, lock, file, func, line, fmt, a...) do { \
376 if (((level) & D_CANTMASK) != 0 || \
377 ((libcfs_debug & (level)) != 0 && \
378 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) { \
379 static struct libcfs_debug_msg_data _ldlm_dbg_data = \
380 DEBUG_MSG_DATA_INIT(cdls, DEBUG_SUBSYSTEM, \
382 _ldlm_lock_debug(lock, level, &_ldlm_dbg_data, fmt, \
387 void _ldlm_lock_debug(struct ldlm_lock *lock, __u32 mask,
388 struct libcfs_debug_msg_data *data, const char *fmt,
390 __attribute__ ((format (printf, 4, 5)));
392 #define LDLM_ERROR(lock, fmt, a...) do { \
393 static cfs_debug_limit_state_t _ldlm_cdls; \
394 ldlm_lock_debug(&_ldlm_cdls, D_ERROR, lock, \
395 __FILE__, __FUNCTION__, __LINE__, \
399 #define LDLM_DEBUG(lock, fmt, a...) do { \
400 ldlm_lock_debug(NULL, D_DLMTRACE, lock, \
401 __FILE__, __FUNCTION__, __LINE__, \
405 #define LDLM_DEBUG(lock, fmt, a...) ((void)0)
406 #define LDLM_ERROR(lock, fmt, a...) ((void)0)
409 #define LDLM_DEBUG_NOLOCK(format, a...) \
410 CDEBUG(D_DLMTRACE, "### " format "\n" , ##a)
412 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
413 int first_enq, ldlm_error_t *err,
414 struct list_head *work_list);
420 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
421 #define LDLM_ITER_STOP 2 /* stop iterating */
423 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
424 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
426 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
428 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
430 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
431 ldlm_res_iterator_t iter, void *closure);
433 int ldlm_replay_locks(struct obd_import *imp);
434 void ldlm_resource_iterate(struct ldlm_namespace *, const struct ldlm_res_id *,
435 ldlm_iterator_t iter, void *data);
439 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
442 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
446 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
447 void *data, int flag);
448 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
449 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
450 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
451 ldlm_blocking_callback, ldlm_glimpse_callback);
452 int ldlm_handle_convert(struct ptlrpc_request *req);
453 int ldlm_handle_cancel(struct ptlrpc_request *req);
454 int ldlm_request_cancel(struct ptlrpc_request *req,
455 const struct ldlm_request *dlm_req, int first);
456 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
457 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock);
458 void ldlm_revoke_export_locks(struct obd_export *exp);
459 int ldlm_get_ref(void);
460 void ldlm_put_ref(int force);
463 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
464 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
465 void ldlm_lock2handle(const struct ldlm_lock *lock,
466 struct lustre_handle *lockh);
467 struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *, int flags);
468 void ldlm_cancel_callback(struct ldlm_lock *);
469 int ldlm_lock_set_data(struct lustre_handle *, void *data);
470 int ldlm_lock_remove_from_lru(struct ldlm_lock *);
471 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
472 const struct lustre_handle *);
474 static inline struct ldlm_lock *ldlm_handle2lock(const struct lustre_handle *h)
476 return __ldlm_handle2lock(h, 0);
479 #define LDLM_LOCK_PUT(lock) \
481 /*LDLM_DEBUG((lock), "put");*/ \
482 ldlm_lock_put(lock); \
485 #define LDLM_LOCK_GET(lock) \
487 ldlm_lock_get(lock); \
488 /*LDLM_DEBUG((lock), "get");*/ \
492 #define ldlm_lock_list_put(head, member, count) \
494 struct ldlm_lock *_lock, *_next; \
496 list_for_each_entry_safe(_lock, _next, head, member) { \
497 list_del_init(&_lock->member); \
498 LDLM_LOCK_PUT(_lock); \
504 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
505 void ldlm_lock_put(struct ldlm_lock *lock);
506 void ldlm_lock_destroy(struct ldlm_lock *lock);
507 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
508 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
509 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
510 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
511 void ldlm_lock_allow_match(struct ldlm_lock *lock);
512 int ldlm_lock_match(struct ldlm_namespace *ns, int flags,
513 const struct ldlm_res_id *,
514 ldlm_type_t type, ldlm_policy_data_t *, ldlm_mode_t mode,
515 struct lustre_handle *);
516 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
518 void ldlm_lock_cancel(struct ldlm_lock *lock);
519 void ldlm_cancel_locks_for_export(struct obd_export *export);
520 void ldlm_reprocess_all(struct ldlm_resource *res);
521 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
522 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
523 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
524 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req);
527 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
528 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
529 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
530 int ldlm_proc_setup(void);
532 void ldlm_proc_cleanup(void);
534 static inline void ldlm_proc_cleanup(void) {}
537 /* resource.c - internal */
538 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
539 struct ldlm_resource *parent,
540 const struct ldlm_res_id *,
541 ldlm_type_t type, int create);
542 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
543 int ldlm_resource_putref(struct ldlm_resource *res);
544 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
545 struct ldlm_lock *lock);
546 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
547 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
548 void ldlm_dump_all_namespaces(int level);
549 void ldlm_namespace_dump(int level, struct ldlm_namespace *);
550 void ldlm_resource_dump(int level, struct ldlm_resource *);
551 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
552 const struct ldlm_res_id *);
554 struct ldlm_callback_suite {
555 ldlm_completion_callback lcs_completion;
556 ldlm_blocking_callback lcs_blocking;
557 ldlm_glimpse_callback lcs_glimpse;
561 int ldlm_expired_completion_wait(void *data);
562 int ldlm_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
563 void *data, int flag);
564 int ldlm_glimpse_ast(struct ldlm_lock *lock, void *reqp);
565 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
566 int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
567 const struct ldlm_res_id *res_id,
568 ldlm_type_t type, ldlm_policy_data_t *policy,
569 ldlm_mode_t mode, int *flags,
570 ldlm_blocking_callback blocking,
571 ldlm_completion_callback completion,
572 ldlm_glimpse_callback glimpse,
573 void *data, void *lvb, __u32 lvb_len, void *lvb_swabber,
574 struct lustre_handle *lockh, int async);
575 struct ptlrpc_request *ldlm_prep_enqueue_req(struct obd_export *exp,
576 int bufcount, int *size,
577 struct list_head *head, int count);
578 int ldlm_handle_enqueue0(struct ldlm_namespace *ns, struct ptlrpc_request *req,
579 const struct ldlm_request *dlm_req,
580 const struct ldlm_callback_suite *cbs);
581 int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
582 ldlm_type_t type, __u8 with_policy, ldlm_mode_t mode,
583 int *flags, void *lvb, __u32 lvb_len,
584 void *lvb_swabber, struct lustre_handle *lockh,
586 int ldlm_cli_enqueue_local(struct ldlm_namespace *ns,
587 const struct ldlm_res_id *res_id,
588 ldlm_type_t type, ldlm_policy_data_t *policy,
589 ldlm_mode_t mode, int *flags,
590 ldlm_blocking_callback blocking,
591 ldlm_completion_callback completion,
592 ldlm_glimpse_callback glimpse,
593 void *data, __u32 lvb_len, void *lvb_swabber,
594 struct lustre_handle *lockh);
595 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
596 void *data, __u32 data_len);
597 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
598 int ldlm_handle_convert0(struct ptlrpc_request *req,
599 const struct ldlm_request *dlm_req);
600 int ldlm_cli_cancel(struct lustre_handle *lockh);
601 int ldlm_cli_cancel_unused(struct ldlm_namespace *, const struct ldlm_res_id *,
602 int flags, void *opaque);
603 int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
604 const struct ldlm_res_id *res_id,
605 ldlm_policy_data_t *policy,
606 int mode, int flags, void *opaque);
607 int ldlm_cli_cancel_req(struct obd_export *exp, struct list_head *head,
608 int count, int flags);
609 int ldlm_cli_join_lru(struct ldlm_namespace *,
610 const struct ldlm_res_id *, int join);
611 int ldlm_cancel_resource_local(struct ldlm_resource *res,
612 struct list_head *cancels,
613 ldlm_policy_data_t *policy,
614 ldlm_mode_t mode, int lock_flags,
615 int flags, void *opaque);
616 int ldlm_cli_cancel_list(struct list_head *head, int count,
617 struct ptlrpc_request *req, int off, int flags);
620 /* This has to be here because recursive inclusion sucks. */
621 int intent_disposition(struct ldlm_reply *rep, int flag);
622 void intent_set_disposition(struct ldlm_reply *rep, int flag);
625 /* ioctls for trying requests */
626 #define IOC_LDLM_TYPE 'f'
627 #define IOC_LDLM_MIN_NR 40
629 #define IOC_LDLM_TEST _IOWR('f', 40, long)
630 #define IOC_LDLM_DUMP _IOWR('f', 41, long)
631 #define IOC_LDLM_REGRESS_START _IOWR('f', 42, long)
632 #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
633 #define IOC_LDLM_MAX_NR 43
635 static inline void lock_res(struct ldlm_resource *res)
637 spin_lock(&res->lr_lock);
640 static inline void unlock_res(struct ldlm_resource *res)
642 spin_unlock(&res->lr_lock);
645 static inline void check_res_locked(struct ldlm_resource *res)
647 LASSERT_SPIN_LOCKED(&res->lr_lock);
650 struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
651 void unlock_res_and_lock(struct ldlm_lock *lock);