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)
35 ELDLM_LOCK_CHANGED = 300,
36 ELDLM_LOCK_ABORTED = 301,
37 ELDLM_LOCK_REPLACED = 302,
38 ELDLM_NO_LOCK_DATA = 303,
40 ELDLM_NAMESPACE_EXISTS = 400,
41 ELDLM_BAD_NAMESPACE = 401
44 #define LDLM_NAMESPACE_SERVER 0
45 #define LDLM_NAMESPACE_CLIENT 1
47 #define LDLM_FL_LOCK_CHANGED 0x000001 /* extent, mode, or resource changed */
49 /* If the server returns one of these flags, then the lock was put on that list.
50 * If the client sends one of these flags (during recovery ONLY!), it wants the
51 * lock added to the specified list, no questions asked. -p */
52 #define LDLM_FL_BLOCK_GRANTED 0x000002
53 #define LDLM_FL_BLOCK_CONV 0x000004
54 #define LDLM_FL_BLOCK_WAIT 0x000008
56 #define LDLM_FL_CBPENDING 0x000010 /* this lock is being destroyed */
57 #define LDLM_FL_AST_SENT 0x000020 /* blocking or cancel packet was sent */
58 #define LDLM_FL_WAIT_NOREPROC 0x000040 /* not a real flag, not saved in lock */
59 #define LDLM_FL_CANCEL 0x000080 /* cancellation callback already run */
61 /* Lock is being replayed. This could probably be implied by the fact that one
62 * of BLOCK_{GRANTED,CONV,WAIT} is set, but that is pretty dangerous. */
63 #define LDLM_FL_REPLAY 0x000100
65 #define LDLM_FL_INTENT_ONLY 0x000200 /* don't grant lock, just do intent */
66 #define LDLM_FL_LOCAL_ONLY 0x000400 /* see ldlm_cli_cancel_unused */
68 /* don't run the cancel callback under ldlm_cli_cancel_unused */
69 #define LDLM_FL_FAILED 0x000800
71 #define LDLM_FL_HAS_INTENT 0x001000 /* lock request has intent */
72 #define LDLM_FL_CANCELING 0x002000 /* lock cancel has already been sent */
73 #define LDLM_FL_LOCAL 0x004000 /* local lock (ie, no srv/cli split) */
74 #define LDLM_FL_WARN 0x008000 /* see ldlm_cli_cancel_unused */
75 #define LDLM_FL_DISCARD_DATA 0x010000 /* discard (no writeback) on cancel */
77 #define LDLM_FL_NO_TIMEOUT 0x020000 /* Blocked by group lock - wait
80 /* file & record locking */
81 #define LDLM_FL_BLOCK_NOWAIT 0x040000 // server told not to wait if blocked
82 #define LDLM_FL_TEST_LOCK 0x080000 // return blocking lock
84 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
85 * the LVB filling happens _after_ the lock has been granted, so another thread
86 * can match`t before the LVB has been updated. As a dirty hack, we set
87 * LDLM_FL_LVB_READY only after we've done the LVB poop.
88 * this is only needed on lov/osc now, where lvb is actually used and callers
89 * must set it in input flags.
91 * The proper fix is to do the granting inside of the completion AST, which can
92 * be replaced with a LVB-aware wrapping function for OSC locks. That change is
93 * pretty high-risk, though, and would need a lot more testing. */
95 #define LDLM_FL_LVB_READY 0x100000
97 /* A lock contributes to the kms calculation until it has finished the part
98 * of it's cancelation that performs write back on its dirty pages. It
99 * can remain on the granted list during this whole time. Threads racing
100 * to update the kms after performing their writeback need to know to
101 * exclude each others locks from the calculation as they walk the granted
103 #define LDLM_FL_KMS_IGNORE 0x200000
105 /* Don't drop lock covering mmapped file in LRU */
106 #define LDLM_FL_NO_LRU 0x400000
108 /* Immediatelly cancel such locks when they block some other locks. Send
109 cancel notification to original lock holder, but expect no reply. */
110 #define LDLM_FL_CANCEL_ON_BLOCK 0x800000
112 /* Flags flags inherited from parent lock when doing intents. */
113 #define LDLM_INHERIT_FLAGS (LDLM_FL_CANCEL_ON_BLOCK)
115 /* These are flags that are mapped into the flags and ASTs of blocking locks */
116 #define LDLM_AST_DISCARD_DATA 0x80000000 /* Add FL_DISCARD to blocking ASTs */
117 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
118 #define LDLM_AST_FLAGS (LDLM_FL_DISCARD_DATA)
120 /* completion ast to be executed */
121 #define LDLM_FL_CP_REQD 0x1000000
123 /* cleanup_resource has already handled the lock */
124 #define LDLM_FL_CLEANED 0x2000000
126 /* optimization hint: LDLM can run blocking callback from current context
127 * w/o involving separate thread. in order to decrease cs rate */
128 #define LDLM_FL_ATOMIC_CB 0x4000000
130 /* while this flag is set, the lock can't change resource */
131 #define LDLM_FL_LOCK_PROTECT 0x8000000
132 #define LDLM_FL_LOCK_PROTECT_BIT 27
135 /* The blocking callback is overloaded to perform two functions. These flags
136 * indicate which operation should be performed. */
137 #define LDLM_CB_BLOCKING 1
138 #define LDLM_CB_CANCELING 2
140 /* position flag of skip list pointers */
141 #define LDLM_SL_HEAD(skip_list) ((skip_list)->next != NULL)
142 #define LDLM_SL_TAIL(skip_list) ((skip_list)->prev != NULL)
143 #define LDLM_SL_EMPTY(skip_list) ((skip_list)->next == NULL && \
144 (skip_list)->prev == NULL)
146 /* compatibility matrix */
147 #define LCK_COMPAT_EX LCK_NL
148 #define LCK_COMPAT_PW (LCK_COMPAT_EX | LCK_CR)
149 #define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
150 #define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
151 #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
152 #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX)
153 #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
155 extern ldlm_mode_t lck_compat_array[];
157 static inline void lockmode_verify(ldlm_mode_t mode)
159 LASSERT(mode > LCK_MINMODE && mode < LCK_MAXMODE);
162 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
164 return (lck_compat_array[exist] & new);
169 * cluster name spaces
173 #define DLM_OST_NAMESPACE 1
174 #define DLM_MDS_NAMESPACE 2
177 - do we just separate this by security domains and use a prefix for
178 multiple namespaces in the same domain?
188 * waiting_locks_spinlock
202 struct ldlm_resource;
203 struct ldlm_namespace;
205 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
206 void *req_cookie, ldlm_mode_t mode, int flags,
209 struct ldlm_valblock_ops {
210 int (*lvbo_init)(struct ldlm_resource *res);
211 int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
212 int buf_idx, int increase);
215 struct ldlm_namespace {
217 __u32 ns_client; /* is this a client-side lock tree? */
218 struct list_head *ns_hash; /* hash table for ns */
219 spinlock_t ns_hash_lock;
220 __u32 ns_refcount; /* count of resources in the hash */
221 struct list_head ns_root_list; /* all root resources in ns */
222 struct list_head ns_list_chain; /* position in global NS list */
224 struct list_head ns_unused_list; /* all root resources in ns */
226 spinlock_t ns_unused_lock;
228 unsigned int ns_max_unused;
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 /* ldlm_lock_change_resource() can change this */
263 struct ldlm_resource *l_resource;
265 /* set once, no need to protect it */
266 struct ldlm_lock *l_parent;
268 /* protected by ns_hash_lock */
269 struct list_head l_children;
270 struct list_head l_childof;
272 /* protected by ns_hash_lock. FIXME */
273 struct list_head l_lru;
275 /* protected by lr_lock */
276 struct list_head l_res_link; // position in one of three res lists
278 struct list_head l_sl_mode; // skip pointer for request mode
279 struct list_head l_sl_policy; // skip pointer for inodebits
281 /* protected by led_lock */
282 struct list_head l_export_chain; // per-export chain of locks
284 /* protected by lr_lock */
285 ldlm_mode_t l_req_mode;
286 ldlm_mode_t l_granted_mode;
288 ldlm_completion_callback l_completion_ast;
289 ldlm_blocking_callback l_blocking_ast;
290 ldlm_glimpse_callback l_glimpse_ast;
292 struct obd_export *l_export;
293 struct obd_export *l_conn_export;
295 /* protected by lr_lock */
298 struct lustre_handle l_remote_handle;
299 ldlm_policy_data_t l_policy_data;
301 /* protected by lr_lock */
306 /* If the lock is granted, a process sleeps on this waitq to learn when
307 * it's no longer in use. If the lock is not granted, a process sleeps
308 * on this waitq to learn when it becomes granted. */
310 struct timeval l_enqueued_time;
312 cfs_time_t l_last_used; /* jiffies */
313 struct ldlm_extent l_req_extent;
315 /* Client-side-only members */
316 __u32 l_lvb_len; /* temporary storage for */
317 void *l_lvb_data; /* an LVB received during */
318 void *l_lvb_swabber; /* an enqueue */
321 /* Server-side-only members */
323 /* protected by elt_lock */
324 struct list_head l_pending_chain; /* callbacks pending */
325 cfs_time_t l_callback_timeout; /* jiffies */
327 __u32 l_pid; /* pid which created this lock */
328 __u32 l_pidb; /* who holds LOCK_PROTECT_BIT */
330 struct list_head l_tmp;
332 /* for ldlm_add_ast_work_item() */
333 struct list_head l_bl_ast;
334 struct list_head l_cp_ast;
335 struct ldlm_lock *l_blocking_lock;
339 struct ldlm_resource {
340 struct ldlm_namespace *lr_namespace;
342 /* protected by ns_hash_lock */
343 struct list_head lr_hash;
344 struct ldlm_resource *lr_parent; /* 0 for a root resource */
345 struct list_head lr_children; /* list head for child resources */
346 struct list_head lr_childof; /* part of ns_root_list if root res,
347 * part of lr_children if child */
350 /* protected by lr_lock */
351 struct list_head lr_granted;
352 struct list_head lr_converting;
353 struct list_head lr_waiting;
354 ldlm_mode_t lr_most_restr;
355 ldlm_type_t lr_type; /* LDLM_{PLAIN,EXTENT,FLOCK} */
356 struct ldlm_res_id lr_name;
357 atomic_t lr_refcount;
359 /* Server-side-only lock value block elements */
360 struct semaphore lr_lvb_sem;
364 /* lr_tmp holds a list head temporarily, during the building of a work
365 * queue. see ldlm_add_ast_work_item and ldlm_run_ast_work */
369 struct ldlm_ast_work {
370 struct ldlm_lock *w_lock;
372 struct ldlm_lock_desc w_desc;
373 struct list_head w_list;
379 extern struct obd_ops ldlm_obd_ops;
381 extern char *ldlm_lockname[];
382 extern char *ldlm_typename[];
383 extern char *ldlm_it2str(int it);
385 #define ldlm_lock_debug(cdls, level, lock, file, func, line, fmt, a...) do { \
388 if (((level) & D_CANTMASK) != 0 || \
389 ((libcfs_debug & (level)) != 0 && \
390 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) { \
391 static struct libcfs_debug_msg_data _ldlm_dbg_data = \
392 DEBUG_MSG_DATA_INIT(cdls, DEBUG_SUBSYSTEM, \
394 _ldlm_lock_debug(lock, level, &_ldlm_dbg_data, fmt, \
399 void _ldlm_lock_debug(struct ldlm_lock *lock, __u32 mask,
400 struct libcfs_debug_msg_data *data, const char *fmt,
403 #define LDLM_ERROR(lock, fmt, a...) do { \
404 static cfs_debug_limit_state_t _ldlm_cdls; \
405 ldlm_lock_debug(&_ldlm_cdls, D_ERROR, lock, \
406 __FILE__, __FUNCTION__, __LINE__, \
410 #define LDLM_DEBUG(lock, fmt, a...) do { \
411 ldlm_lock_debug(NULL, D_DLMTRACE, lock, \
412 __FILE__, __FUNCTION__, __LINE__, \
416 #define LDLM_DEBUG_NOLOCK(format, a...) \
417 CDEBUG(D_DLMTRACE, "### " format "\n" , ##a)
419 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
420 int first_enq, ldlm_error_t *err,
421 struct list_head *work_list);
427 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
428 #define LDLM_ITER_STOP 2 /* stop iterating */
430 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
431 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
433 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
435 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
437 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
438 ldlm_res_iterator_t iter, void *closure);
440 int ldlm_replay_locks(struct obd_import *imp);
441 void ldlm_resource_iterate(struct ldlm_namespace *, struct ldlm_res_id *,
442 ldlm_iterator_t iter, void *data);
446 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
449 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
453 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
454 void *data, int flag);
455 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
456 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
457 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
458 ldlm_blocking_callback, ldlm_glimpse_callback);
459 int ldlm_handle_convert(struct ptlrpc_request *req);
460 int ldlm_handle_cancel(struct ptlrpc_request *req);
461 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
462 int ldlm_refresh_waiting_lock(struct ldlm_lock *lock);
463 int ldlm_get_ref(void);
464 void ldlm_put_ref(int force);
467 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
468 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
469 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
470 struct ldlm_lock *__ldlm_handle2lock(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 struct lustre_handle *);
477 static inline struct ldlm_lock *ldlm_handle2lock(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 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
496 void ldlm_lock_put(struct ldlm_lock *lock);
497 void ldlm_lock_destroy(struct ldlm_lock *lock);
498 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
499 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
500 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
501 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
502 void ldlm_lock_allow_match(struct ldlm_lock *lock);
503 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
504 ldlm_type_t type, ldlm_policy_data_t *, ldlm_mode_t mode,
505 struct lustre_handle *);
506 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
508 void ldlm_lock_cancel(struct ldlm_lock *lock);
509 void ldlm_cancel_locks_for_export(struct obd_export *export);
510 void ldlm_reprocess_all(struct ldlm_resource *res);
511 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
512 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
513 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
516 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
517 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
518 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
519 int ldlm_proc_setup(void);
521 void ldlm_proc_cleanup(void);
523 static inline void ldlm_proc_cleanup(void) {}
526 /* resource.c - internal */
527 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
528 struct ldlm_resource *parent,
529 struct ldlm_res_id, ldlm_type_t type,
531 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
532 int ldlm_resource_putref(struct ldlm_resource *res);
533 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
534 struct ldlm_lock *lock);
535 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
536 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
537 void ldlm_dump_all_namespaces(int level);
538 void ldlm_namespace_dump(int level, struct ldlm_namespace *);
539 void ldlm_resource_dump(int level, struct ldlm_resource *);
540 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
544 int ldlm_expired_completion_wait(void *data);
545 int ldlm_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
546 void *data, int flag);
547 int ldlm_glimpse_ast(struct ldlm_lock *lock, void *reqp);
548 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
549 int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **req,
550 struct ldlm_res_id res_id, ldlm_type_t type,
551 ldlm_policy_data_t *policy, ldlm_mode_t mode, int *flags,
552 ldlm_blocking_callback blocking,
553 ldlm_completion_callback completion,
554 ldlm_glimpse_callback glimpse,
555 void *data, void *lvb, __u32 lvb_len, void *lvb_swabber,
556 struct lustre_handle *lockh, int async);
557 int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req,
558 ldlm_type_t type, __u8 with_policy, ldlm_mode_t mode,
559 int *flags, void *lvb, __u32 lvb_len,
560 void *lvb_swabber, struct lustre_handle *lockh,
562 int ldlm_cli_enqueue_local(struct ldlm_namespace *ns, struct ldlm_res_id res_id,
563 ldlm_type_t type, ldlm_policy_data_t *policy,
564 ldlm_mode_t mode, int *flags,
565 ldlm_blocking_callback blocking,
566 ldlm_completion_callback completion,
567 ldlm_glimpse_callback glimpse,
568 void *data, __u32 lvb_len, void *lvb_swabber,
569 struct lustre_handle *lockh);
570 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
571 void *data, __u32 data_len);
572 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
573 int ldlm_cli_cancel(struct lustre_handle *lockh);
574 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
575 int flags, void *opaque);
576 int ldlm_cli_join_lru(struct ldlm_namespace *, struct ldlm_res_id *, int join);
579 /* This has to be here because recursive inclusion sucks. */
580 int intent_disposition(struct ldlm_reply *rep, int flag);
581 void intent_set_disposition(struct ldlm_reply *rep, int flag);
584 /* ioctls for trying requests */
585 #define IOC_LDLM_TYPE 'f'
586 #define IOC_LDLM_MIN_NR 40
588 #define IOC_LDLM_TEST _IOWR('f', 40, long)
589 #define IOC_LDLM_DUMP _IOWR('f', 41, long)
590 #define IOC_LDLM_REGRESS_START _IOWR('f', 42, long)
591 #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
592 #define IOC_LDLM_MAX_NR 43
594 static inline void lock_res(struct ldlm_resource *res)
596 spin_lock(&res->lr_lock);
599 static inline void unlock_res(struct ldlm_resource *res)
601 spin_unlock(&res->lr_lock);
604 static inline void check_res_locked(struct ldlm_resource *res)
606 LASSERT_SPIN_LOCKED(&res->lr_lock);
609 # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,60)
610 static inline void lock_bitlock(struct ldlm_lock *lock)
612 bit_spin_lock(LDLM_FL_LOCK_PROTECT_BIT, (void *) &lock->l_flags);
613 LASSERT(lock->l_pidb == 0);
614 lock->l_pidb = current->pid;
617 static inline void unlock_bitlock(struct ldlm_lock *lock)
619 LASSERT(lock->l_pidb == current->pid);
621 bit_spin_unlock(LDLM_FL_LOCK_PROTECT_BIT, (void *) &lock->l_flags);
623 #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60) */
624 static inline void lock_bitlock(struct ldlm_lock *lock)
626 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
627 /* bit_spin_lock(LDLM_FL_LOCK_PROTECT_BIT, (void *)&lock->l_flags);*/
628 while (test_and_set_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags)) {
629 while (test_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags))
634 LASSERT(lock->l_pidb == 0);
635 lock->l_pidb = current->pid;
638 static inline void unlock_bitlock(struct ldlm_lock *lock)
640 LASSERT(lock->l_pidb == current->pid);
643 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
644 /* bit_spin_unlock(LDLM_FL_LOCK_PROTECT_BIT, (void *)&lock->l_flags);*/
645 BUG_ON(!test_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags));
646 smp_mb__before_clear_bit();
647 clear_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags);
650 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,60) */
651 #else /* !__KERNEL__ */
652 static inline void lock_bitlock(struct ldlm_lock *lock)
654 lock->l_flags |= 1 << LDLM_FL_LOCK_PROTECT_BIT;
657 static inline void unlock_bitlock(struct ldlm_lock *lock)
659 lock->l_flags &= ~(1 << LDLM_FL_LOCK_PROTECT_BIT);
661 #endif /* __KERNEL__ */
662 struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
663 void unlock_res_and_lock(struct ldlm_lock *lock);