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/proc_fs.h>
13 #include <linux/lustre_lib.h>
14 #include <linux/lustre_net.h>
15 #include <linux/lustre_import.h>
16 #include <linux/lustre_handles.h>
17 #include <linux/lustre_export.h> /* for obd_export, for LDLM_DEBUG */
22 #define OBD_LDLM_DEVICENAME "ldlm"
24 #define LDLM_DEFAULT_LRU_SIZE 100
29 ELDLM_LOCK_CHANGED = 300,
30 ELDLM_LOCK_ABORTED = 301,
31 ELDLM_LOCK_REPLACED = 302,
32 ELDLM_NO_LOCK_DATA = 303,
34 ELDLM_NAMESPACE_EXISTS = 400,
35 ELDLM_BAD_NAMESPACE = 401
38 #define LDLM_NAMESPACE_SERVER 0
39 #define LDLM_NAMESPACE_CLIENT 1
41 #define LDLM_FL_LOCK_CHANGED 0x000001 /* extent, mode, or resource changed */
43 /* If the server returns one of these flags, then the lock was put on that list.
44 * If the client sends one of these flags (during recovery ONLY!), it wants the
45 * lock added to the specified list, no questions asked. -p */
46 #define LDLM_FL_BLOCK_GRANTED 0x000002
47 #define LDLM_FL_BLOCK_CONV 0x000004
48 #define LDLM_FL_BLOCK_WAIT 0x000008
50 #define LDLM_FL_CBPENDING 0x000010 /* this lock is being destroyed */
51 #define LDLM_FL_AST_SENT 0x000020 /* blocking or cancel packet was sent */
52 #define LDLM_FL_WAIT_NOREPROC 0x000040 /* not a real flag, not saved in lock */
53 #define LDLM_FL_CANCEL 0x000080 /* cancellation callback already run */
55 /* Lock is being replayed. This could probably be implied by the fact that one
56 * of BLOCK_{GRANTED,CONV,WAIT} is set, but that is pretty dangerous. */
57 #define LDLM_FL_REPLAY 0x000100
59 #define LDLM_FL_INTENT_ONLY 0x000200 /* don't grant lock, just do intent */
60 #define LDLM_FL_LOCAL_ONLY 0x000400 /* see ldlm_cli_cancel_unused */
62 /* don't run the cancel callback under ldlm_cli_cancel_unused */
63 #define LDLM_FL_FAILED 0x000800
65 #define LDLM_FL_HAS_INTENT 0x001000 /* lock request has intent */
66 #define LDLM_FL_CANCELING 0x002000 /* lock cancel has already been sent */
67 #define LDLM_FL_LOCAL 0x004000 /* local lock (ie, no srv/cli split) */
68 #define LDLM_FL_WARN 0x008000 /* see ldlm_cli_cancel_unused */
69 #define LDLM_FL_DISCARD_DATA 0x010000 /* discard (no writeback) on cancel */
70 #define LDLM_FL_CONFIG_CHANGE 0x020000 /* see ldlm_cli_cancel_unused */
72 #define LDLM_FL_NO_TIMEOUT 0x020000 /* Blocked by group lock - wait
75 /* file & record locking */
76 #define LDLM_FL_BLOCK_NOWAIT 0x040000 /* server told not to wait if blocked */
77 #define LDLM_FL_TEST_LOCK 0x080000 /* return blocking lock */
79 /* These are flags that are mapped into the flags and ASTs of blocking locks */
80 #define LDLM_AST_DISCARD_DATA 0x80000000 /* Add FL_DISCARD to blocking ASTs */
81 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
82 #define LDLM_AST_FLAGS (LDLM_FL_DISCARD_DATA)
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 before the LVB has been updated. As a dirty hack, we set
87 * LDLM_FL_CAN_MATCH only after we've done the LVB poop.
89 * The proper fix is to do the granting inside of the completion AST, which can
90 * be replaced with a LVB-aware wrapping function for OSC locks. That change is
91 * pretty high-risk, though, and would need a lot more testing. */
92 #define LDLM_FL_CAN_MATCH 0x100000
94 /* A lock contributes to the kms calculation until it has finished the part
95 * of it's cancelation that performs write back on its dirty pages. It
96 * can remain on the granted list during this whole time. Threads racing
97 * to update the kms after performing their writeback need to know to
98 * exclude each others locks from the calculation as they walk the granted
100 #define LDLM_FL_KMS_IGNORE 0x200000
102 /* completion ast to be executed */
103 #define LDLM_FL_CP_REQD 0x400000
105 /* cleanup_resource has already handled the lock */
106 #define LDLM_FL_CLEANED 0x800000
108 /* optimization hint: LDLM can run blocking callback from current context
109 * w/o involving separate thread. in order to decrease cs rate -bzzz */
110 #define LDLM_FL_ATOMIC_CB 0x1000000
112 /* while this flag is set, the lock can't change resource */
113 #define LDLM_FL_LOCK_PROTECT 0x4000000
114 #define LDLM_FL_LOCK_PROTECT_BIT 26
116 /* The blocking callback is overloaded to perform two functions. These flags
117 * indicate which operation should be performed. */
118 #define LDLM_CB_BLOCKING 1
119 #define LDLM_CB_CANCELING 2
121 /* compatibility matrix */
122 #define LCK_COMPAT_EX LCK_NL
123 #define LCK_COMPAT_PW (LCK_COMPAT_EX | LCK_CR)
124 #define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
125 #define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
126 #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
127 #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX)
128 #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
130 static ldlm_mode_t lck_compat_array[] = {
131 [LCK_EX] LCK_COMPAT_EX,
132 [LCK_PW] LCK_COMPAT_PW,
133 [LCK_PR] LCK_COMPAT_PR,
134 [LCK_CW] LCK_COMPAT_CW,
135 [LCK_CR] LCK_COMPAT_CR,
136 [LCK_NL] LCK_COMPAT_NL,
137 [LCK_GROUP] LCK_COMPAT_GROUP
140 static inline void lockmode_verify(ldlm_mode_t mode)
142 LASSERT(mode >= LCK_EX && mode <= LCK_GROUP);
145 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
147 return (lck_compat_array[exist] & new);
152 * cluster name spaces
156 #define DLM_OST_NAMESPACE 1
157 #define DLM_MDS_NAMESPACE 2
160 - do we just separate this by security domains and use a prefix for
161 multiple namespaces in the same domain?
171 * waiting_locks_spinlock
185 struct ldlm_resource;
186 struct ldlm_namespace;
188 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
189 void *req_cookie, ldlm_mode_t mode, int flags,
192 struct ldlm_valblock_ops {
193 int (*lvbo_init)(struct ldlm_resource *res);
195 int (*lvbo_update)(struct ldlm_resource *res,
196 struct lustre_msg *m,
197 int buf_idx, int increase);
200 struct ldlm_namespace {
202 __u32 ns_client; /* is this a client-side lock tree? */
203 struct list_head *ns_hash; /* hash table for ns */
204 spinlock_t ns_hash_lock;
205 __u32 ns_refcount; /* count of resources in the hash */
206 struct list_head ns_root_list; /* all root resources in ns */
207 struct list_head ns_list_chain; /* position in global NS list */
209 struct proc_dir_entry *ns_proc_dir;
212 struct list_head ns_unused_list; /* all root resources in ns */
214 spinlock_t ns_unused_lock;
216 unsigned int ns_max_unused;
217 unsigned long ns_next_dump; /* next dump time */
221 ldlm_res_policy ns_policy;
222 struct ldlm_valblock_ops *ns_lvbo;
224 wait_queue_head_t ns_waitq;
229 * Resource hash table
233 #define RES_HASH_BITS 10
234 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
235 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
239 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
240 struct ldlm_lock_desc *new, void *data,
242 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
244 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
247 struct portals_handle l_handle; // must be first in the structure
250 /* ldlm_lock_change_resource() can change this */
251 struct ldlm_resource *l_resource;
253 /* set once, no need to protect it */
254 struct ldlm_lock *l_parent;
256 /* protected by ns_hash_lock */
257 struct list_head l_children;
258 struct list_head l_childof;
260 /* protected by ns_hash_lock. FIXME */
261 struct list_head l_lru;
263 /* protected by lr_lock */
264 struct list_head l_res_link; // position in one of three res lists
266 /* protected by led_lock */
267 struct list_head l_export_chain; // per-export chain of locks
269 /* protected by lr_lock */
270 ldlm_mode_t l_req_mode;
271 ldlm_mode_t l_granted_mode;
273 ldlm_completion_callback l_completion_ast;
274 ldlm_blocking_callback l_blocking_ast;
275 ldlm_glimpse_callback l_glimpse_ast;
277 struct obd_export *l_export;
278 struct obd_export *l_conn_export;
280 /* protected by lr_lock */
283 struct lustre_handle l_remote_handle;
284 ldlm_policy_data_t l_policy_data;
286 /* protected by lr_lock */
291 /* If the lock is granted, a process sleeps on this waitq to learn when
292 * it's no longer in use. If the lock is not granted, a process sleeps
293 * on this waitq to learn when it becomes granted. */
294 wait_queue_head_t l_waitq;
295 struct timeval l_enqueued_time;
297 unsigned long l_last_used; /* jiffies */
298 struct ldlm_extent l_req_extent;
300 /* Client-side-only members */
301 __u32 l_lvb_len; /* temporary storage for */
302 void *l_lvb_data; /* an LVB received during */
303 void *l_lvb_swabber; /* an enqueue */
306 /* Server-side-only members */
308 /* protected by elt_lock */
309 struct list_head l_pending_chain; /* callbacks pending */
310 unsigned long l_callback_timeout;
312 __u32 l_pid; /* pid which created this lock */
313 __u32 l_pidb; /* who holds LOCK_PROTECT_BIT */
315 struct list_head l_tmp;
317 /* for ldlm_add_ast_work_item() */
318 struct list_head l_bl_ast;
319 struct list_head l_cp_ast;
320 struct ldlm_lock *l_blocking_lock;
324 #define LDLM_PLAIN 10
325 #define LDLM_EXTENT 11
326 #define LDLM_FLOCK 12
327 #define LDLM_IBITS 13
329 #define LDLM_MIN_TYPE 10
330 #define LDLM_MAX_TYPE 14
332 struct ldlm_resource {
333 struct ldlm_namespace *lr_namespace;
335 /* protected by ns_hash_lock */
336 struct list_head lr_hash;
337 struct ldlm_resource *lr_parent; /* 0 for a root resource */
338 struct list_head lr_children; /* list head for child resources */
339 struct list_head lr_childof; /* part of ns_root_list if root res,
340 * part of lr_children if child */
343 /* protected by lr_lock */
344 struct list_head lr_granted;
345 struct list_head lr_converting;
346 struct list_head lr_waiting;
347 ldlm_mode_t lr_most_restr;
348 __u32 lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
349 struct ldlm_res_id lr_name;
350 atomic_t lr_refcount;
352 /* Server-side-only lock value block elements */
353 struct semaphore lr_lvb_sem;
357 /* lr_tmp holds a list head temporarily, during the building of a work
358 * queue. see ldlm_add_ast_work_item and ldlm_run_ast_work */
362 struct ldlm_ast_work {
363 struct ldlm_lock *w_lock;
365 struct ldlm_lock_desc w_desc;
366 struct list_head w_list;
372 extern struct obd_ops ldlm_obd_ops;
374 extern char *ldlm_lockname[];
375 extern char *ldlm_typename[];
376 extern char *ldlm_it2str(int it);
378 #define __LDLM_DEBUG(level, lock, format, a...) \
380 if (lock->l_resource == NULL) { \
381 CDEBUG(level, "### " format \
382 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
383 "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: " \
384 LPX64" expref: %d pid: %u\n" , ## a, lock, \
385 lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
386 lock->l_readers, lock->l_writers, \
387 ldlm_lockname[lock->l_granted_mode], \
388 ldlm_lockname[lock->l_req_mode], \
389 lock->l_flags, lock->l_remote_handle.cookie, \
391 atomic_read(&lock->l_export->exp_refcount) : -99, \
395 if (lock->l_resource->lr_type == LDLM_EXTENT) { \
396 CDEBUG(level, "### " format \
397 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
398 "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s ["LPU64 \
399 "->"LPU64"] (req "LPU64"->"LPU64") flags: %x remote: " \
400 LPX64" expref: %d pid: %u\n" , ## a, \
401 lock->l_resource->lr_namespace->ns_name, lock, \
402 lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
403 lock->l_readers, lock->l_writers, \
404 ldlm_lockname[lock->l_granted_mode], \
405 ldlm_lockname[lock->l_req_mode], \
406 lock->l_resource->lr_name.name[0], \
407 lock->l_resource->lr_name.name[1], \
408 lock->l_resource->lr_name.name[2], \
409 atomic_read(&lock->l_resource->lr_refcount), \
410 ldlm_typename[lock->l_resource->lr_type], \
411 lock->l_policy_data.l_extent.start, \
412 lock->l_policy_data.l_extent.end, \
413 lock->l_req_extent.start, lock->l_req_extent.end, \
414 lock->l_flags, lock->l_remote_handle.cookie, \
416 atomic_read(&lock->l_export->exp_refcount) : -99, \
420 if (lock->l_resource->lr_type == LDLM_FLOCK) { \
421 CDEBUG(level, "### " format \
422 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
423 "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s pid: " \
424 LPU64" " "["LPU64"->"LPU64"] flags: %x remote: "LPX64 \
425 " expref: %d pid: %u\n" , ## a, \
426 lock->l_resource->lr_namespace->ns_name, lock, \
427 lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
428 lock->l_readers, lock->l_writers, \
429 ldlm_lockname[lock->l_granted_mode], \
430 ldlm_lockname[lock->l_req_mode], \
431 lock->l_resource->lr_name.name[0], \
432 lock->l_resource->lr_name.name[1], \
433 lock->l_resource->lr_name.name[2], \
434 atomic_read(&lock->l_resource->lr_refcount), \
435 ldlm_typename[lock->l_resource->lr_type], \
436 lock->l_policy_data.l_flock.pid, \
437 lock->l_policy_data.l_flock.start, \
438 lock->l_policy_data.l_flock.end, \
439 lock->l_flags, lock->l_remote_handle.cookie, \
441 atomic_read(&lock->l_export->exp_refcount) : -99, \
445 if (lock->l_resource->lr_type == LDLM_IBITS) { \
446 CDEBUG(level, "### " format \
447 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
448 "res: "LPU64"/"LPU64"/"LPU64" bits "LPX64" rrc: %d " \
449 "type: %s flags: %x remote: "LPX64" expref: %d " \
451 lock->l_resource->lr_namespace->ns_name, \
452 lock, lock->l_handle.h_cookie, \
453 atomic_read (&lock->l_refc), \
454 lock->l_readers, lock->l_writers, \
455 ldlm_lockname[lock->l_granted_mode], \
456 ldlm_lockname[lock->l_req_mode], \
457 lock->l_resource->lr_name.name[0], \
458 lock->l_resource->lr_name.name[1], \
459 lock->l_resource->lr_name.name[2], \
460 lock->l_policy_data.l_inodebits.bits, \
461 atomic_read(&lock->l_resource->lr_refcount), \
462 ldlm_typename[lock->l_resource->lr_type], \
463 lock->l_flags, lock->l_remote_handle.cookie, \
465 atomic_read(&lock->l_export->exp_refcount) : -99, \
470 CDEBUG(level, "### " format \
471 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
472 "res: "LPU64"/"LPU64"/"LPU64"/"LPU64" rrc: %d type: %s " \
473 "flags: %x remote: "LPX64" expref: %d " \
474 "pid: %u\n" , ## a, \
475 lock->l_resource->lr_namespace->ns_name, \
476 lock, lock->l_handle.h_cookie, \
477 atomic_read (&lock->l_refc), \
478 lock->l_readers, lock->l_writers, \
479 ldlm_lockname[lock->l_granted_mode], \
480 ldlm_lockname[lock->l_req_mode], \
481 lock->l_resource->lr_name.name[0], \
482 lock->l_resource->lr_name.name[1], \
483 lock->l_resource->lr_name.name[2], \
484 lock->l_resource->lr_name.name[3], \
485 atomic_read(&lock->l_resource->lr_refcount), \
486 ldlm_typename[lock->l_resource->lr_type], \
487 lock->l_flags, lock->l_remote_handle.cookie, \
489 atomic_read(&lock->l_export->exp_refcount) : -99, \
494 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
496 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
498 #define LDLM_DEBUG_NOLOCK(format, a...) \
499 CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
501 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
502 int first_enq, ldlm_error_t *err,
503 struct list_head *work_list);
509 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
510 #define LDLM_ITER_STOP 2 /* stop iterating */
512 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
513 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
515 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
517 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
519 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
520 ldlm_res_iterator_t iter, void *closure);
522 int ldlm_replay_locks(struct obd_import *imp);
523 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
524 ldlm_iterator_t iter, void *data);
527 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
530 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
534 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
535 void *data, int flag);
536 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
537 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
538 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
539 ldlm_blocking_callback, ldlm_glimpse_callback);
540 int ldlm_handle_convert(struct ptlrpc_request *req);
541 int ldlm_handle_cancel(struct ptlrpc_request *req);
542 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
543 int ldlm_get_ref(void);
544 void ldlm_put_ref(int force);
547 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
548 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
549 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
550 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
551 void ldlm_cancel_callback(struct ldlm_lock *);
552 int ldlm_lock_set_data(struct lustre_handle *, void *data);
553 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
554 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
555 struct lustre_handle *);
557 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
559 return __ldlm_handle2lock(h, 0);
562 #define LDLM_LOCK_PUT(lock) \
564 /*LDLM_DEBUG((lock), "put");*/ \
565 ldlm_lock_put(lock); \
568 #define LDLM_LOCK_GET(lock) \
570 ldlm_lock_get(lock); \
571 /*LDLM_DEBUG((lock), "get");*/ \
575 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
576 void ldlm_lock_put(struct ldlm_lock *lock);
577 void ldlm_lock_destroy(struct ldlm_lock *lock);
578 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
579 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
580 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
581 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
582 void ldlm_lock_allow_match(struct ldlm_lock *lock);
583 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
584 __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
585 struct lustre_handle *);
586 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
588 void ldlm_lock_cancel(struct ldlm_lock *lock);
589 void ldlm_cancel_locks_for_export(struct obd_export *export);
590 void ldlm_reprocess_all(struct ldlm_resource *res);
591 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
592 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
593 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
596 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
597 int ldlm_regression_start(struct obd_device *obddev,
598 struct lustre_handle *connh,
599 unsigned int threads, unsigned int max_locks_in,
600 unsigned int num_resources_in,
601 unsigned int num_extents_in);
602 int ldlm_regression_stop(void);
606 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
607 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
608 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
609 int ldlm_proc_setup(void);
610 void ldlm_proc_cleanup(void);
612 /* resource.c - internal */
613 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
614 struct ldlm_resource *parent,
615 struct ldlm_res_id, __u32 type,
617 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
618 int ldlm_resource_putref(struct ldlm_resource *res);
619 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
620 struct ldlm_lock *lock);
621 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
622 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
623 void ldlm_dump_all_namespaces(int level);
624 void ldlm_namespace_dump(int level, struct ldlm_namespace *);
625 void ldlm_resource_dump(int level, struct ldlm_resource *);
626 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
630 int ldlm_expired_completion_wait(void *data);
631 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
632 int ldlm_cli_enqueue(struct obd_export *exp,
633 struct ptlrpc_request *req,
634 struct ldlm_namespace *ns,
637 ldlm_policy_data_t *,
640 ldlm_blocking_callback blocking,
641 ldlm_completion_callback completion,
642 ldlm_glimpse_callback glimpse,
647 struct lustre_handle *lockh);
648 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
649 void *data, __u32 data_len);
650 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
651 int ldlm_cli_cancel(struct lustre_handle *lockh);
652 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
653 int flags, void *opaque);
656 /* This has to be here because recursive inclusion sucks. */
657 int intent_disposition(struct ldlm_reply *rep, int flag);
658 void intent_set_disposition(struct ldlm_reply *rep, int flag);
659 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
660 void *data, int flag);
663 /* ioctls for trying requests */
664 #define IOC_LDLM_TYPE 'f'
665 #define IOC_LDLM_MIN_NR 40
667 #define IOC_LDLM_TEST _IOWR('f', 40, long)
668 #define IOC_LDLM_DUMP _IOWR('f', 41, long)
669 #define IOC_LDLM_REGRESS_START _IOWR('f', 42, long)
670 #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
671 #define IOC_LDLM_MAX_NR 43
673 static inline void lock_res(struct ldlm_resource *res)
675 spin_lock(&res->lr_lock);
678 static inline void unlock_res(struct ldlm_resource *res)
680 spin_unlock(&res->lr_lock);
683 static inline void check_res_locked(struct ldlm_resource *res)
685 LASSERT_SPIN_LOCKED(&res->lr_lock);
688 struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
689 void unlock_res_and_lock(struct ldlm_lock *lock);