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 /* while this flag is set, the lock can't change resource */
132 #define LDLM_FL_LOCK_PROTECT 0x8000000
133 #define LDLM_FL_LOCK_PROTECT_BIT 27
135 /* Cancel lock asynchronously. See ldlm_cli_cancel_unused_resource. */
136 #define LDLM_FL_ASYNC 0x20000000
138 /* The blocking callback is overloaded to perform two functions. These flags
139 * indicate which operation should be performed. */
140 #define LDLM_CB_BLOCKING 1
141 #define LDLM_CB_CANCELING 2
143 /* position flag of skip list pointers */
144 #define LDLM_SL_HEAD(skip_list) ((skip_list)->next != NULL)
145 #define LDLM_SL_TAIL(skip_list) ((skip_list)->prev != NULL)
146 #define LDLM_SL_EMPTY(skip_list) ((skip_list)->next == NULL && \
147 (skip_list)->prev == NULL)
149 /* compatibility matrix */
150 #define LCK_COMPAT_EX LCK_NL
151 #define LCK_COMPAT_PW (LCK_COMPAT_EX | LCK_CR)
152 #define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
153 #define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
154 #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
155 #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX | LCK_GROUP)
156 #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
158 extern ldlm_mode_t lck_compat_array[];
160 static inline void lockmode_verify(ldlm_mode_t mode)
162 LASSERT(mode > LCK_MINMODE && mode < LCK_MAXMODE);
165 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
167 return (lck_compat_array[exist] & new);
172 * cluster name spaces
176 #define DLM_OST_NAMESPACE 1
177 #define DLM_MDS_NAMESPACE 2
180 - do we just separate this by security domains and use a prefix for
181 multiple namespaces in the same domain?
191 * waiting_locks_spinlock
205 struct ldlm_resource;
206 struct ldlm_namespace;
208 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
209 void *req_cookie, ldlm_mode_t mode, int flags,
212 struct ldlm_valblock_ops {
213 int (*lvbo_init)(struct ldlm_resource *res);
214 int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
215 int buf_idx, int increase);
218 struct ldlm_namespace {
220 __u32 ns_client; /* is this a client-side lock tree? */
221 struct list_head *ns_hash; /* hash table for ns */
222 spinlock_t ns_hash_lock;
223 __u32 ns_refcount; /* count of resources in the hash */
224 struct list_head ns_root_list; /* all root resources in ns */
225 struct list_head ns_list_chain; /* position in global NS list */
227 struct list_head ns_unused_list; /* all root resources in ns */
229 spinlock_t ns_unused_lock;
231 unsigned int ns_max_unused;
232 unsigned int ns_max_age;
233 cfs_time_t ns_next_dump; /* next debug dump, jiffies */
237 ldlm_res_policy ns_policy;
238 struct ldlm_valblock_ops *ns_lvbo;
240 cfs_waitq_t ns_waitq;
245 * Resource hash table
249 #define RES_HASH_BITS 10
250 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
251 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
255 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
256 struct ldlm_lock_desc *new, void *data,
258 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
260 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
263 struct portals_handle l_handle; // must be first in the structure
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 /* protected by lr_lock */
295 struct lustre_handle l_remote_handle;
296 ldlm_policy_data_t l_policy_data;
298 /* protected by lr_lock */
303 /* If the lock is granted, a process sleeps on this waitq to learn when
304 * it's no longer in use. If the lock is not granted, a process sleeps
305 * on this waitq to learn when it becomes granted. */
307 struct timeval l_enqueued_time;
309 cfs_time_t l_last_used; /* jiffies */
310 struct ldlm_extent l_req_extent;
312 /* Client-side-only members */
313 __u32 l_lvb_len; /* temporary storage for */
314 void *l_lvb_data; /* an LVB received during */
315 void *l_lvb_swabber; /* an enqueue */
318 /* Server-side-only members */
320 /* protected by elt_lock */
321 struct list_head l_pending_chain; /* callbacks pending */
322 cfs_time_t l_callback_timeout; /* jiffies */
324 __u32 l_pid; /* pid which created this lock */
325 __u32 l_pidb; /* who holds LOCK_PROTECT_BIT */
327 /* for ldlm_add_ast_work_item() */
328 struct list_head l_bl_ast;
329 struct list_head l_cp_ast;
330 struct ldlm_lock *l_blocking_lock;
334 struct ldlm_resource {
335 struct ldlm_namespace *lr_namespace;
337 /* protected by ns_hash_lock */
338 struct list_head lr_hash;
339 struct ldlm_resource *lr_parent; /* 0 for a root resource */
340 struct list_head lr_children; /* list head for child resources */
341 struct list_head lr_childof; /* part of ns_root_list if root res,
342 * part of lr_children if child */
345 /* protected by lr_lock */
346 struct list_head lr_granted;
347 struct list_head lr_converting;
348 struct list_head lr_waiting;
349 ldlm_mode_t lr_most_restr;
350 ldlm_type_t lr_type; /* LDLM_{PLAIN,EXTENT,FLOCK} */
351 struct ldlm_res_id lr_name;
352 atomic_t lr_refcount;
354 /* Server-side-only lock value block elements */
355 struct semaphore lr_lvb_sem;
360 struct ldlm_ast_work {
361 struct ldlm_lock *w_lock;
363 struct ldlm_lock_desc w_desc;
364 struct list_head w_list;
370 extern struct obd_ops ldlm_obd_ops;
372 extern char *ldlm_lockname[];
373 extern char *ldlm_typename[];
374 extern char *ldlm_it2str(int it);
376 #define ldlm_lock_debug(cdls, level, lock, file, func, line, fmt, a...) do { \
379 if (((level) & D_CANTMASK) != 0 || \
380 ((libcfs_debug & (level)) != 0 && \
381 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) { \
382 static struct libcfs_debug_msg_data _ldlm_dbg_data = \
383 DEBUG_MSG_DATA_INIT(cdls, DEBUG_SUBSYSTEM, \
385 _ldlm_lock_debug(lock, level, &_ldlm_dbg_data, fmt, \
390 void _ldlm_lock_debug(struct ldlm_lock *lock, __u32 mask,
391 struct libcfs_debug_msg_data *data, const char *fmt,
393 __attribute__ ((format (printf, 4, 5)));
395 #define LDLM_ERROR(lock, fmt, a...) do { \
396 static cfs_debug_limit_state_t _ldlm_cdls; \
397 ldlm_lock_debug(&_ldlm_cdls, D_ERROR, lock, \
398 __FILE__, __FUNCTION__, __LINE__, \
402 #define LDLM_DEBUG(lock, fmt, a...) do { \
403 ldlm_lock_debug(NULL, D_DLMTRACE, lock, \
404 __FILE__, __FUNCTION__, __LINE__, \
408 #define LDLM_DEBUG(lock, fmt, a...) ((void)0)
409 #define LDLM_ERROR(lock, fmt, a...) ((void)0)
412 #define LDLM_DEBUG_NOLOCK(format, a...) \
413 CDEBUG(D_DLMTRACE, "### " format "\n" , ##a)
415 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
416 int first_enq, ldlm_error_t *err,
417 struct list_head *work_list);
423 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
424 #define LDLM_ITER_STOP 2 /* stop iterating */
426 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
427 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
429 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
431 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
433 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
434 ldlm_res_iterator_t iter, void *closure);
436 int ldlm_replay_locks(struct obd_import *imp);
437 void ldlm_resource_iterate(struct ldlm_namespace *, const struct ldlm_res_id *,
438 ldlm_iterator_t iter, void *data);
442 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
445 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
449 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
450 void *data, int flag);
451 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
452 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
453 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
454 ldlm_blocking_callback, ldlm_glimpse_callback);
455 int ldlm_handle_convert(struct ptlrpc_request *req);
456 int ldlm_handle_cancel(struct ptlrpc_request *req);
457 int ldlm_request_cancel(struct ptlrpc_request *req,
458 const struct ldlm_request *dlm_req, int first);
459 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
460 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock);
461 void ldlm_revoke_export_locks(struct obd_export *exp);
462 int ldlm_get_ref(void);
463 void ldlm_put_ref(int force);
466 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
467 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
468 void ldlm_lock2handle(const struct ldlm_lock *lock,
469 struct lustre_handle *lockh);
470 struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *, int flags);
471 void ldlm_cancel_callback(struct ldlm_lock *);
472 int ldlm_lock_set_data(struct lustre_handle *, void *data);
473 int ldlm_lock_remove_from_lru(struct ldlm_lock *);
474 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
475 const struct lustre_handle *);
477 static inline struct ldlm_lock *ldlm_handle2lock(const struct lustre_handle *h)
479 return __ldlm_handle2lock(h, 0);
482 #define LDLM_LOCK_PUT(lock) \
484 /*LDLM_DEBUG((lock), "put");*/ \
485 ldlm_lock_put(lock); \
488 #define LDLM_LOCK_GET(lock) \
490 ldlm_lock_get(lock); \
491 /*LDLM_DEBUG((lock), "get");*/ \
495 #define ldlm_lock_list_put(head, member, count) \
497 struct ldlm_lock *_lock, *_next; \
499 list_for_each_entry_safe(_lock, _next, head, member) { \
500 list_del_init(&_lock->member); \
501 LDLM_LOCK_PUT(_lock); \
507 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
508 void ldlm_lock_put(struct ldlm_lock *lock);
509 void ldlm_lock_destroy(struct ldlm_lock *lock);
510 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
511 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
512 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
513 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
514 void ldlm_lock_allow_match(struct ldlm_lock *lock);
515 int ldlm_lock_match(struct ldlm_namespace *ns, int flags,
516 const struct ldlm_res_id *,
517 ldlm_type_t type, ldlm_policy_data_t *, ldlm_mode_t mode,
518 struct lustre_handle *);
519 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
521 void ldlm_lock_cancel(struct ldlm_lock *lock);
522 void ldlm_cancel_locks_for_export(struct obd_export *export);
523 void ldlm_reprocess_all(struct ldlm_resource *res);
524 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
525 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
526 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
527 void ldlm_unlink_lock_skiplist(struct ldlm_lock *req);
530 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
531 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
532 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
533 int ldlm_proc_setup(void);
535 void ldlm_proc_cleanup(void);
537 static inline void ldlm_proc_cleanup(void) {}
540 /* resource.c - internal */
541 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
542 struct ldlm_resource *parent,
543 const struct ldlm_res_id *,
544 ldlm_type_t type, int create);
545 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
546 int ldlm_resource_putref(struct ldlm_resource *res);
547 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
548 struct ldlm_lock *lock);
549 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
550 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
551 void ldlm_dump_all_namespaces(int level);
552 void ldlm_namespace_dump(int level, struct ldlm_namespace *);
553 void ldlm_resource_dump(int level, struct ldlm_resource *);
554 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
555 const struct ldlm_res_id *);
557 struct ldlm_callback_suite {
558 ldlm_completion_callback lcs_completion;
559 ldlm_blocking_callback lcs_blocking;
560 ldlm_glimpse_callback lcs_glimpse;
564 int ldlm_expired_completion_wait(void *data);
565 int ldlm_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
566 void *data, int flag);
567 int ldlm_glimpse_ast(struct ldlm_lock *lock, void *reqp);
568 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
569 int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
570 const struct ldlm_res_id *res_id,
571 ldlm_type_t type, ldlm_policy_data_t *policy,
572 ldlm_mode_t mode, int *flags,
573 ldlm_blocking_callback blocking,
574 ldlm_completion_callback completion,
575 ldlm_glimpse_callback glimpse,
576 void *data, void *lvb, __u32 lvb_len, void *lvb_swabber,
577 struct lustre_handle *lockh, int async);
578 struct ptlrpc_request *ldlm_prep_enqueue_req(struct obd_export *exp,
579 int bufcount, int *size,
580 struct list_head *head, int count);
581 int ldlm_handle_enqueue0(struct ldlm_namespace *ns, struct ptlrpc_request *req,
582 const struct ldlm_request *dlm_req,
583 const struct ldlm_callback_suite *cbs);
584 int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
585 ldlm_type_t type, __u8 with_policy, ldlm_mode_t mode,
586 int *flags, void *lvb, __u32 lvb_len,
587 void *lvb_swabber, struct lustre_handle *lockh,
589 int ldlm_cli_enqueue_local(struct ldlm_namespace *ns,
590 const struct ldlm_res_id *res_id,
591 ldlm_type_t type, ldlm_policy_data_t *policy,
592 ldlm_mode_t mode, int *flags,
593 ldlm_blocking_callback blocking,
594 ldlm_completion_callback completion,
595 ldlm_glimpse_callback glimpse,
596 void *data, __u32 lvb_len, void *lvb_swabber,
597 struct lustre_handle *lockh);
598 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
599 void *data, __u32 data_len);
600 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
601 int ldlm_handle_convert0(struct ptlrpc_request *req,
602 const struct ldlm_request *dlm_req);
603 int ldlm_cli_cancel(struct lustre_handle *lockh);
604 int ldlm_cli_cancel_unused(struct ldlm_namespace *, const struct ldlm_res_id *,
605 int flags, void *opaque);
606 int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
607 const struct ldlm_res_id *res_id,
608 ldlm_policy_data_t *policy,
609 int mode, int flags, void *opaque);
610 int ldlm_cli_cancel_req(struct obd_export *exp, struct list_head *head,
611 int count, int flags);
612 int ldlm_cli_join_lru(struct ldlm_namespace *,
613 const struct ldlm_res_id *, int join);
614 int ldlm_cancel_resource_local(struct ldlm_resource *res,
615 struct list_head *cancels,
616 ldlm_policy_data_t *policy,
617 ldlm_mode_t mode, int lock_flags,
618 int flags, void *opaque);
619 int ldlm_cli_cancel_list(struct list_head *head, int count,
620 struct ptlrpc_request *req, int off, int flags);
623 /* This has to be here because recursive inclusion sucks. */
624 int intent_disposition(struct ldlm_reply *rep, int flag);
625 void intent_set_disposition(struct ldlm_reply *rep, int flag);
628 /* ioctls for trying requests */
629 #define IOC_LDLM_TYPE 'f'
630 #define IOC_LDLM_MIN_NR 40
632 #define IOC_LDLM_TEST _IOWR('f', 40, long)
633 #define IOC_LDLM_DUMP _IOWR('f', 41, long)
634 #define IOC_LDLM_REGRESS_START _IOWR('f', 42, long)
635 #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
636 #define IOC_LDLM_MAX_NR 43
638 static inline void lock_res(struct ldlm_resource *res)
640 spin_lock(&res->lr_lock);
643 static inline void unlock_res(struct ldlm_resource *res)
645 spin_unlock(&res->lr_lock);
648 static inline void check_res_locked(struct ldlm_resource *res)
650 LASSERT_SPIN_LOCKED(&res->lr_lock);
653 # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,60)
654 static inline void lock_bitlock(struct ldlm_lock *lock)
656 bit_spin_lock(LDLM_FL_LOCK_PROTECT_BIT, (void *) &lock->l_flags);
657 LASSERT(lock->l_pidb == 0);
658 lock->l_pidb = current->pid;
661 static inline void unlock_bitlock(struct ldlm_lock *lock)
663 LASSERT(lock->l_pidb == current->pid);
665 bit_spin_unlock(LDLM_FL_LOCK_PROTECT_BIT, (void *) &lock->l_flags);
667 #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60) */
668 static inline void lock_bitlock(struct ldlm_lock *lock)
670 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
671 /* bit_spin_lock(LDLM_FL_LOCK_PROTECT_BIT, (void *)&lock->l_flags);*/
672 while (test_and_set_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags)) {
673 while (test_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags))
678 LASSERT(lock->l_pidb == 0);
679 lock->l_pidb = current->pid;
682 static inline void unlock_bitlock(struct ldlm_lock *lock)
684 LASSERT(lock->l_pidb == current->pid);
687 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
688 /* bit_spin_unlock(LDLM_FL_LOCK_PROTECT_BIT, (void *)&lock->l_flags);*/
689 BUG_ON(!test_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags));
690 smp_mb__before_clear_bit();
691 clear_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags);
694 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,60) */
695 #else /* !__KERNEL__ */
696 static inline void lock_bitlock(struct ldlm_lock *lock)
698 lock->l_flags |= 1 << LDLM_FL_LOCK_PROTECT_BIT;
701 static inline void unlock_bitlock(struct ldlm_lock *lock)
703 lock->l_flags &= ~(1 << LDLM_FL_LOCK_PROTECT_BIT);
705 #endif /* __KERNEL__ */
706 struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
707 void unlock_res_and_lock(struct ldlm_lock *lock);