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 /* The blocking callback is overloaded to perform two functions. These flags
103 * indicate which operation should be performed. */
104 #define LDLM_CB_BLOCKING 1
105 #define LDLM_CB_CANCELING 2
107 /* compatibility matrix */
108 #define LCK_COMPAT_EX LCK_NL
109 #define LCK_COMPAT_PW (LCK_COMPAT_EX | LCK_CR)
110 #define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
111 #define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
112 #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
113 #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX)
114 #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
116 static ldlm_mode_t lck_compat_array[] = {
117 [LCK_EX] LCK_COMPAT_EX,
118 [LCK_PW] LCK_COMPAT_PW,
119 [LCK_PR] LCK_COMPAT_PR,
120 [LCK_CW] LCK_COMPAT_CW,
121 [LCK_CR] LCK_COMPAT_CR,
122 [LCK_NL] LCK_COMPAT_NL,
123 [LCK_GROUP] LCK_COMPAT_GROUP
126 static inline void lockmode_verify(ldlm_mode_t mode)
128 LASSERT(mode >= LCK_EX && mode <= LCK_GROUP);
131 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
133 return (lck_compat_array[exist] & new);
138 * cluster name spaces
142 #define DLM_OST_NAMESPACE 1
143 #define DLM_MDS_NAMESPACE 2
146 - do we just separate this by security domains and use a prefix for
147 multiple namespaces in the same domain?
152 struct ldlm_resource;
153 struct ldlm_namespace;
155 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
156 void *req_cookie, ldlm_mode_t mode, int flags,
159 struct ldlm_valblock_ops {
160 int (*lvbo_init)(struct ldlm_resource *res);
161 int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
162 int buf_idx, int increase);
165 struct ldlm_namespace {
167 __u32 ns_client; /* is this a client-side lock tree? */
168 struct list_head *ns_hash; /* hash table for ns */
169 __u32 ns_refcount; /* count of resources in the hash */
170 struct list_head ns_root_list; /* all root resources in ns */
171 struct lustre_lock ns_lock; /* protects hash, refcount, list */
172 struct list_head ns_list_chain; /* position in global NS list */
174 struct proc_dir_entry *ns_proc_dir;
177 struct list_head ns_unused_list; /* all root resources in ns */
179 unsigned int ns_max_unused;
181 spinlock_t ns_counter_lock;
184 ldlm_res_policy ns_policy;
185 struct ldlm_valblock_ops *ns_lvbo;
187 wait_queue_head_t ns_waitq;
192 * Resource hash table
196 #define RES_HASH_BITS 10
197 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
198 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
202 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
203 struct ldlm_lock_desc *new, void *data,
205 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
207 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
210 struct portals_handle l_handle; // must be first in the structure
212 struct ldlm_resource *l_resource;
213 struct ldlm_lock *l_parent;
214 struct list_head l_children;
215 struct list_head l_childof;
216 struct list_head l_lru;
217 struct list_head l_res_link; // position in one of three res lists
218 struct list_head l_export_chain; // per-export chain of locks
220 ldlm_mode_t l_req_mode;
221 ldlm_mode_t l_granted_mode;
223 ldlm_completion_callback l_completion_ast;
224 ldlm_blocking_callback l_blocking_ast;
225 ldlm_glimpse_callback l_glimpse_ast;
227 struct obd_export *l_export;
228 struct obd_export *l_conn_export;
230 struct lustre_handle l_remote_handle;
231 ldlm_policy_data_t l_policy_data;
237 /* If the lock is granted, a process sleeps on this waitq to learn when
238 * it's no longer in use. If the lock is not granted, a process sleeps
239 * on this waitq to learn when it becomes granted. */
240 wait_queue_head_t l_waitq;
241 struct timeval l_enqueued_time;
243 unsigned long l_last_used; /* jiffies */
244 struct ldlm_extent l_req_extent;
246 /* Client-side-only members */
247 __u32 l_lvb_len; /* temporary storage for */
248 void *l_lvb_data; /* an LVB received during */
249 void *l_lvb_swabber; /* an enqueue */
252 /* Server-side-only members */
253 struct list_head l_pending_chain; /* callbacks pending */
254 unsigned long l_callback_timeout;
257 #define LDLM_PLAIN 10
258 #define LDLM_EXTENT 11
259 #define LDLM_FLOCK 12
260 #define LDLM_IBITS 13
262 #define LDLM_MIN_TYPE 10
263 #define LDLM_MAX_TYPE 13
265 struct ldlm_resource {
266 struct ldlm_namespace *lr_namespace;
267 struct list_head lr_hash;
268 struct ldlm_resource *lr_parent; /* 0 for a root resource */
269 struct list_head lr_children; /* list head for child resources */
270 struct list_head lr_childof; /* part of ns_root_list if root res,
271 * part of lr_children if child */
273 struct list_head lr_granted;
274 struct list_head lr_converting;
275 struct list_head lr_waiting;
276 ldlm_mode_t lr_most_restr;
277 __u32 lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
278 struct ldlm_resource *lr_root;
279 struct ldlm_res_id lr_name;
280 atomic_t lr_refcount;
282 /* Server-side-only lock value block elements */
283 struct semaphore lr_lvb_sem;
287 /* lr_tmp holds a list head temporarily, during the building of a work
288 * queue. see ldlm_add_ast_work_item and ldlm_run_ast_work */
292 struct ldlm_ast_work {
293 struct ldlm_lock *w_lock;
295 struct ldlm_lock_desc w_desc;
296 struct list_head w_list;
302 extern struct obd_ops ldlm_obd_ops;
304 extern char *ldlm_lockname[];
305 extern char *ldlm_typename[];
306 extern char *ldlm_it2str(int it);
308 #define __LDLM_DEBUG(level, lock, format, a...) \
310 if (lock->l_resource == NULL) { \
311 CDEBUG(level, "### " format \
312 " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
313 "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: " \
314 LPX64" expref: %d\n" , ## a, lock, \
315 lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
316 lock->l_readers, lock->l_writers, \
317 ldlm_lockname[lock->l_granted_mode], \
318 ldlm_lockname[lock->l_req_mode], \
319 lock->l_flags, lock->l_remote_handle.cookie, \
321 atomic_read(&lock->l_export->exp_refcount) : -99); \
324 if (lock->l_resource->lr_type == LDLM_EXTENT) { \
325 CDEBUG(level, "### " format \
326 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
327 "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s ["LPU64 \
328 "->"LPU64"] (req "LPU64"->"LPU64") flags: %x remote: " \
329 LPX64" expref: %d\n" , ## a, \
330 lock->l_resource->lr_namespace->ns_name, lock, \
331 lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
332 lock->l_readers, lock->l_writers, \
333 ldlm_lockname[lock->l_granted_mode], \
334 ldlm_lockname[lock->l_req_mode], \
335 lock->l_resource->lr_name.name[0], \
336 lock->l_resource->lr_name.name[1], \
337 lock->l_resource->lr_name.name[2], \
338 atomic_read(&lock->l_resource->lr_refcount), \
339 ldlm_typename[lock->l_resource->lr_type], \
340 lock->l_policy_data.l_extent.start, \
341 lock->l_policy_data.l_extent.end, \
342 lock->l_req_extent.start, lock->l_req_extent.end, \
343 lock->l_flags, lock->l_remote_handle.cookie, \
345 atomic_read(&lock->l_export->exp_refcount) : -99); \
348 if (lock->l_resource->lr_type == LDLM_FLOCK) { \
349 CDEBUG(level, "### " format \
350 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
351 "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s pid: " \
352 LPU64" ["LPU64"->"LPU64"] flags: %x remote: "LPX64 \
353 " expref: %d\n" , ## a, \
354 lock->l_resource->lr_namespace->ns_name, lock, \
355 lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
356 lock->l_readers, lock->l_writers, \
357 ldlm_lockname[lock->l_granted_mode], \
358 ldlm_lockname[lock->l_req_mode], \
359 lock->l_resource->lr_name.name[0], \
360 lock->l_resource->lr_name.name[1], \
361 lock->l_resource->lr_name.name[2], \
362 atomic_read(&lock->l_resource->lr_refcount), \
363 ldlm_typename[lock->l_resource->lr_type], \
364 lock->l_policy_data.l_flock.pid, \
365 lock->l_policy_data.l_flock.start, \
366 lock->l_policy_data.l_flock.end, \
367 lock->l_flags, lock->l_remote_handle.cookie, \
369 atomic_read(&lock->l_export->exp_refcount) : -99); \
372 if (lock->l_resource->lr_type == LDLM_IBITS) { \
373 CDEBUG(level, "### " format \
374 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
375 "res: "LPU64"/"LPU64"/"LPU64" bits "LPX64" rrc: %d " \
376 "type: %s flags: %x remote: "LPX64" expref: %d\n" , ## a,\
377 lock->l_resource->lr_namespace->ns_name, \
378 lock, lock->l_handle.h_cookie, \
379 atomic_read (&lock->l_refc), \
380 lock->l_readers, lock->l_writers, \
381 ldlm_lockname[lock->l_granted_mode], \
382 ldlm_lockname[lock->l_req_mode], \
383 lock->l_resource->lr_name.name[0], \
384 lock->l_resource->lr_name.name[1], \
385 lock->l_resource->lr_name.name[2], \
386 lock->l_policy_data.l_inodebits.bits, \
387 atomic_read(&lock->l_resource->lr_refcount), \
388 ldlm_typename[lock->l_resource->lr_type], \
389 lock->l_flags, lock->l_remote_handle.cookie, \
391 atomic_read(&lock->l_export->exp_refcount) : -99); \
395 CDEBUG(level, "### " format \
396 " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
397 "res: "LPU64"/"LPU64"/"LPU64"/"LPU64" rrc: %d type: %s "\
398 "flags: %x remote: "LPX64" expref: %d\n" , ## a, \
399 lock->l_resource->lr_namespace->ns_name, \
400 lock, lock->l_handle.h_cookie, \
401 atomic_read (&lock->l_refc), \
402 lock->l_readers, lock->l_writers, \
403 ldlm_lockname[lock->l_granted_mode], \
404 ldlm_lockname[lock->l_req_mode], \
405 lock->l_resource->lr_name.name[0], \
406 lock->l_resource->lr_name.name[1], \
407 lock->l_resource->lr_name.name[2], \
408 lock->l_resource->lr_name.name[3], \
409 atomic_read(&lock->l_resource->lr_refcount), \
410 ldlm_typename[lock->l_resource->lr_type], \
411 lock->l_flags, lock->l_remote_handle.cookie, \
413 atomic_read(&lock->l_export->exp_refcount) : -99); \
417 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
419 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
421 #define LDLM_DEBUG_NOLOCK(format, a...) \
422 CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
424 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
425 int first_enq, ldlm_error_t *err);
431 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
432 #define LDLM_ITER_STOP 2 /* stop iterating */
434 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
435 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
437 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
439 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
441 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
442 ldlm_res_iterator_t iter, void *closure);
444 int ldlm_replay_locks(struct obd_import *imp);
445 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
446 ldlm_iterator_t iter, void *data);
449 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
452 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
456 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
457 void *data, int flag);
458 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
459 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
460 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
461 ldlm_blocking_callback, ldlm_glimpse_callback);
462 int ldlm_handle_convert(struct ptlrpc_request *req);
463 int ldlm_handle_cancel(struct ptlrpc_request *req);
464 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
465 int ldlm_get_ref(void);
466 void ldlm_put_ref(int force);
469 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
470 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
471 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
472 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
473 void ldlm_cancel_callback(struct ldlm_lock *);
474 int ldlm_lock_set_data(struct lustre_handle *, void *data);
475 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
476 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
477 struct lustre_handle *);
479 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
481 return __ldlm_handle2lock(h, 0);
484 #define LDLM_LOCK_PUT(lock) \
486 /*LDLM_DEBUG((lock), "put");*/ \
487 ldlm_lock_put(lock); \
490 #define LDLM_LOCK_GET(lock) \
492 ldlm_lock_get(lock); \
493 /*LDLM_DEBUG((lock), "get");*/ \
497 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
498 void ldlm_lock_put(struct ldlm_lock *lock);
499 void ldlm_lock_destroy(struct ldlm_lock *lock);
500 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
501 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
502 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
503 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
504 void ldlm_lock_allow_match(struct ldlm_lock *lock);
505 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
506 __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
507 struct lustre_handle *);
508 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
510 void ldlm_lock_cancel(struct ldlm_lock *lock);
511 void ldlm_cancel_locks_for_export(struct obd_export *export);
512 void ldlm_reprocess_all(struct ldlm_resource *res);
513 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
514 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
515 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
518 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
519 int ldlm_regression_start(struct obd_device *obddev,
520 struct lustre_handle *connh,
521 unsigned int threads, unsigned int max_locks_in,
522 unsigned int num_resources_in,
523 unsigned int num_extents_in);
524 int ldlm_regression_stop(void);
528 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
529 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
530 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
531 int ldlm_proc_setup(void);
532 void ldlm_proc_cleanup(void);
534 /* resource.c - internal */
535 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
536 struct ldlm_resource *parent,
537 struct ldlm_res_id, __u32 type,
539 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
540 int ldlm_resource_putref(struct ldlm_resource *res);
541 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
542 struct ldlm_lock *lock);
543 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
544 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
545 void ldlm_dump_all_namespaces(void);
546 void ldlm_namespace_dump(struct ldlm_namespace *);
547 void ldlm_resource_dump(struct ldlm_resource *);
548 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
552 int ldlm_expired_completion_wait(void *data);
553 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
554 int ldlm_cli_enqueue(struct obd_export *exp,
555 struct ptlrpc_request *req,
556 struct ldlm_namespace *ns,
559 ldlm_policy_data_t *,
562 ldlm_blocking_callback blocking,
563 ldlm_completion_callback completion,
564 ldlm_glimpse_callback glimpse,
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);
578 /* This has to be here because recursive inclusion sucks. */
579 int intent_disposition(struct ldlm_reply *rep, int flag);
580 void intent_set_disposition(struct ldlm_reply *rep, int flag);
581 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
582 void *data, int flag);
585 /* ioctls for trying requests */
586 #define IOC_LDLM_TYPE 'f'
587 #define IOC_LDLM_MIN_NR 40
589 #define IOC_LDLM_TEST _IOWR('f', 40, long)
590 #define IOC_LDLM_DUMP _IOWR('f', 41, long)
591 #define IOC_LDLM_REGRESS_START _IOWR('f', 42, long)
592 #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
593 #define IOC_LDLM_MAX_NR 43