lustre/include/linux/lustre_dlm.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * (visit-tags-table FILE)
   3  * vim:expandtab:shiftwidth=8:tabstop=8:
   4  */
   5
   6 #ifndef _LUSTRE_DLM_H__
   7 #define _LUSTRE_DLM_H__
   8
   9 #ifdef __KERNEL__
  10 # include <linux/proc_fs.h>
  11 #endif
  12
  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 */
  18
  19 struct obd_ops;
  20 struct obd_device;
  21
  22 #define OBD_LDLM_DEVICENAME  "ldlm"
  23
  24 #define LDLM_DEFAULT_LRU_SIZE 100
  25
  26 typedef enum {
  27         ELDLM_OK = 0,
  28
  29         ELDLM_LOCK_CHANGED = 300,
  30         ELDLM_LOCK_ABORTED = 301,
  31         ELDLM_LOCK_REPLACED = 302,
  32         ELDLM_NO_LOCK_DATA = 303,
  33
  34         ELDLM_NAMESPACE_EXISTS = 400,
  35         ELDLM_BAD_NAMESPACE    = 401
  36 } ldlm_error_t;
  37
  38 #define LDLM_NAMESPACE_SERVER 0
  39 #define LDLM_NAMESPACE_CLIENT 1
  40
  41 #define LDLM_FL_LOCK_CHANGED   0x000001 /* extent, mode, or resource changed */
  42
  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
  49
  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 */
  54
  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
  58
  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 */
  61
  62 /* don't run the cancel callback under ldlm_cli_cancel_unused */
  63 #define LDLM_FL_FAILED         0x000800
  64
  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
  71 #define LDLM_FL_NO_TIMEOUT     0x020000 /* Blocked by group lock - wait
  72                                          * indefinitely */
  73
  74 /* file & record locking */
  75 #define LDLM_FL_BLOCK_NOWAIT   0x040000 // server told not to wait if blocked
  76 #define LDLM_FL_TEST_LOCK      0x080000 // return blocking lock
  77
  78 /* These are flags that are mapped into the flags and ASTs of blocking locks */
  79 #define LDLM_AST_DISCARD_DATA  0x80000000 /* Add FL_DISCARD to blocking ASTs */
  80 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
  81 #define LDLM_AST_FLAGS         (LDLM_FL_DISCARD_DATA)
  82
  83 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
  84  * the LVB filling happens _after_ the lock has been granted, so another thread
  85  * can match before the LVB has been updated.  As a dirty hack, we set
  86  * LDLM_FL_CAN_MATCH only after we've done the LVB poop.
  87  *
  88  * The proper fix is to do the granting inside of the completion AST, which can
  89  * be replaced with a LVB-aware wrapping function for OSC locks.  That change is
  90  * pretty high-risk, though, and would need a lot more testing. */
  91 #define LDLM_FL_CAN_MATCH      0x100000
  92
  93 /* The blocking callback is overloaded to perform two functions.  These flags
  94  * indicate which operation should be performed. */
  95 #define LDLM_CB_BLOCKING    1
  96 #define LDLM_CB_CANCELING   2
  97
  98 /* compatibility matrix */
  99 #define LCK_COMPAT_EX  LCK_NL
 100 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
 101 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
 102 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
 103 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 104 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 105 #define LCK_COMPAT_GROUP  (LCK_GROUP | LCK_NL)
 106
 107 static ldlm_mode_t lck_compat_array[] = {
 108         [LCK_EX] LCK_COMPAT_EX,
 109         [LCK_PW] LCK_COMPAT_PW,
 110         [LCK_PR] LCK_COMPAT_PR,
 111         [LCK_CW] LCK_COMPAT_CW,
 112         [LCK_CR] LCK_COMPAT_CR,
 113         [LCK_NL] LCK_COMPAT_NL,
 114         [LCK_GROUP] LCK_COMPAT_GROUP
 115 };
 116
 117 static inline void lockmode_verify(ldlm_mode_t mode)
 118 {
 119        LASSERT(mode >= LCK_EX && mode <= LCK_GROUP);
 120 }
 121
 122 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 123 {
 124        return (lck_compat_array[exist] & new);
 125 }
 126
 127 /*
 128  *
 129  * cluster name spaces
 130  *
 131  */
 132
 133 #define DLM_OST_NAMESPACE 1
 134 #define DLM_MDS_NAMESPACE 2
 135
 136 /* XXX
 137    - do we just separate this by security domains and use a prefix for
 138      multiple namespaces in the same domain?
 139    -
 140 */
 141
 142 struct ldlm_lock;
 143 struct ldlm_resource;
 144 struct ldlm_namespace;
 145
 146 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 147                                void *req_cookie, ldlm_mode_t mode, int flags,
 148                                void *data);
 149
 150 struct ldlm_valblock_ops {
 151         int (*lvbo_init)(struct ldlm_resource *res);
 152         int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
 153                            int buf_idx, int increase);
 154 };
 155
 156 struct ldlm_namespace {
 157         char                  *ns_name;
 158         __u32                  ns_client; /* is this a client-side lock tree? */
 159         struct list_head      *ns_hash; /* hash table for ns */
 160         __u32                  ns_refcount; /* count of resources in the hash */
 161         struct list_head       ns_root_list; /* all root resources in ns */
 162         struct lustre_lock     ns_lock; /* protects hash, refcount, list */
 163         struct list_head       ns_list_chain; /* position in global NS list */
 164         /*
 165         struct proc_dir_entry *ns_proc_dir;
 166         */
 167
 168         struct list_head       ns_unused_list; /* all root resources in ns */
 169         int                    ns_nr_unused;
 170         unsigned int           ns_max_unused;
 171
 172         spinlock_t             ns_counter_lock;
 173         __u64                  ns_locks;
 174         __u64                  ns_resources;
 175         ldlm_res_policy        ns_policy;
 176         struct ldlm_valblock_ops *ns_lvbo;
 177         void                    *ns_lvbp;
 178 };
 179
 180 /*
 181  *
 182  * Resource hash table
 183  *
 184  */
 185
 186 #define RES_HASH_BITS 10
 187 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 188 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 189
 190 struct ldlm_lock;
 191
 192 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 193                                       struct ldlm_lock_desc *new, void *data,
 194                                       int flag);
 195 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 196                                         void *data);
 197 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 198
 199 struct ldlm_lock {
 200         struct portals_handle l_handle; // must be first in the structure
 201         atomic_t              l_refc;
 202         struct ldlm_resource *l_resource;
 203         struct ldlm_lock     *l_parent;
 204         struct list_head      l_children;
 205         struct list_head      l_childof;
 206         struct list_head      l_lru;
 207         struct list_head      l_res_link; // position in one of three res lists
 208         struct list_head      l_export_chain; // per-export chain of locks
 209
 210         ldlm_mode_t           l_req_mode;
 211         ldlm_mode_t           l_granted_mode;
 212
 213         ldlm_completion_callback l_completion_ast;
 214         ldlm_blocking_callback   l_blocking_ast;
 215         ldlm_glimpse_callback    l_glimpse_ast;
 216
 217         struct obd_export    *l_export;
 218         struct obd_export    *l_conn_export;
 219         __u32                 l_flags;
 220         struct lustre_handle  l_remote_handle;
 221         ldlm_policy_data_t    l_policy_data;
 222
 223         __u32                 l_readers;
 224         __u32                 l_writers;
 225         __u8                  l_destroyed;
 226
 227         /* If the lock is granted, a process sleeps on this waitq to learn when
 228          * it's no longer in use.  If the lock is not granted, a process sleeps
 229          * on this waitq to learn when it becomes granted. */
 230         wait_queue_head_t     l_waitq;
 231         struct timeval        l_enqueued_time;
 232
 233         unsigned long         l_last_used;      /* jiffies */
 234         struct ldlm_extent    l_req_extent;
 235
 236         /* Client-side-only members */
 237         __u32                 l_lvb_len;        /* temporary storage for */
 238         void                 *l_lvb_data;       /* an LVB received during */
 239         void                 *l_lvb_swabber;    /* an enqueue */
 240         void                 *l_ast_data;
 241
 242         /* Server-side-only members */
 243         struct list_head      l_pending_chain;  /* callbacks pending */
 244         unsigned long         l_callback_timeout;
 245 };
 246
 247 #define LDLM_PLAIN       10
 248 #define LDLM_EXTENT      11
 249 #define LDLM_FLOCK       12
 250
 251 #define LDLM_MIN_TYPE 10
 252 #define LDLM_MAX_TYPE 12
 253
 254 struct ldlm_resource {
 255         struct ldlm_namespace *lr_namespace;
 256         struct list_head       lr_hash;
 257         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 258         struct list_head       lr_children; /* list head for child resources */
 259         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 260                                              * part of lr_children if child */
 261
 262         struct list_head       lr_granted;
 263         struct list_head       lr_converting;
 264         struct list_head       lr_waiting;
 265         ldlm_mode_t            lr_most_restr;
 266         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 267         struct ldlm_resource  *lr_root;
 268         struct ldlm_res_id     lr_name;
 269         atomic_t               lr_refcount;
 270
 271         /* Server-side-only lock value block elements */
 272         struct semaphore       lr_lvb_sem;
 273         __u32                  lr_lvb_len;
 274         void                  *lr_lvb_data;
 275
 276         /* lr_tmp holds a list head temporarily, during the building of a work
 277          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 278         void                  *lr_tmp;
 279 };
 280
 281 struct ldlm_ast_work {
 282         struct ldlm_lock *w_lock;
 283         int               w_blocking;
 284         struct ldlm_lock_desc w_desc;
 285         struct list_head   w_list;
 286         int w_flags;
 287         void *w_data;
 288         int w_datalen;
 289 };
 290
 291 extern struct obd_ops ldlm_obd_ops;
 292
 293 extern char *ldlm_lockname[];
 294 extern char *ldlm_typename[];
 295 extern char *ldlm_it2str(int it);
 296
 297 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 298 do {                                                                          \
 299         if (lock->l_resource == NULL) {                                       \
 300                 CDEBUG(level, "### " format                                   \
 301                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 302                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 303                        LPX64" expref: %d\n" , ## a, lock,                     \
 304                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 305                        lock->l_readers, lock->l_writers,                      \
 306                        ldlm_lockname[lock->l_granted_mode],                   \
 307                        ldlm_lockname[lock->l_req_mode],                       \
 308                        lock->l_flags, lock->l_remote_handle.cookie,           \
 309                        lock->l_export ?                                       \
 310                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 311                 break;                                                        \
 312         }                                                                     \
 313         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 314                 CDEBUG(level, "### " format                                   \
 315                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 316                        "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64\
 317                        "] (req "LPU64"->"LPU64") flags: %x remote: "LPX64     \
 318                        " expref: %d\n" , ## a,                                \
 319                        lock->l_resource->lr_namespace->ns_name, lock,         \
 320                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 321                        lock->l_readers, lock->l_writers,                      \
 322                        ldlm_lockname[lock->l_granted_mode],                   \
 323                        ldlm_lockname[lock->l_req_mode],                       \
 324                        lock->l_resource->lr_name.name[0],                     \
 325                        lock->l_resource->lr_name.name[1],                     \
 326                        atomic_read(&lock->l_resource->lr_refcount),           \
 327                        ldlm_typename[lock->l_resource->lr_type],              \
 328                        lock->l_policy_data.l_extent.start,                    \
 329                        lock->l_policy_data.l_extent.end,                      \
 330                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 331                        lock->l_flags, lock->l_remote_handle.cookie,           \
 332                        lock->l_export ?                                       \
 333                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 334                 break;                                                        \
 335         }                                                                     \
 336         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 337                 CDEBUG(level, "### " format                                   \
 338                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 339                        "res: "LPU64"/"LPU64" rrc: %d type: %s pid: "LPU64" "  \
 340                        "["LPU64"->"LPU64"] flags: %x remote: "LPX64           \
 341                        " expref: %d\n" , ## a,                                \
 342                        lock->l_resource->lr_namespace->ns_name, lock,         \
 343                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 344                        lock->l_readers, lock->l_writers,                      \
 345                        ldlm_lockname[lock->l_granted_mode],                   \
 346                        ldlm_lockname[lock->l_req_mode],                       \
 347                        lock->l_resource->lr_name.name[0],                     \
 348                        lock->l_resource->lr_name.name[1],                     \
 349                        atomic_read(&lock->l_resource->lr_refcount),           \
 350                        ldlm_typename[lock->l_resource->lr_type],              \
 351                        lock->l_policy_data.l_flock.pid,                       \
 352                        lock->l_policy_data.l_flock.start,                     \
 353                        lock->l_policy_data.l_flock.end,                       \
 354                        lock->l_flags, lock->l_remote_handle.cookie,           \
 355                        lock->l_export ?                                       \
 356                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 357                 break;                                                        \
 358         }                                                                     \
 359         {                                                                     \
 360                 CDEBUG(level, "### " format                                   \
 361                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 362                        "res: "LPU64"/"LPU64" rrc: %d type: %s flags: %x "     \
 363                        "remote: "LPX64" expref: %d\n" , ## a,                 \
 364                        lock->l_resource->lr_namespace->ns_name,               \
 365                        lock, lock->l_handle.h_cookie,                         \
 366                        atomic_read (&lock->l_refc),                           \
 367                        lock->l_readers, lock->l_writers,                      \
 368                        ldlm_lockname[lock->l_granted_mode],                   \
 369                        ldlm_lockname[lock->l_req_mode],                       \
 370                        lock->l_resource->lr_name.name[0],                     \
 371                        lock->l_resource->lr_name.name[1],                     \
 372                        atomic_read(&lock->l_resource->lr_refcount),           \
 373                        ldlm_typename[lock->l_resource->lr_type],              \
 374                        lock->l_flags, lock->l_remote_handle.cookie,           \
 375                        lock->l_export ?                                       \
 376                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 377         }                                                                     \
 378 } while (0)
 379
 380 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 381                                                     format, ## a)
 382 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 383
 384 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 385         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 386
 387 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 388                                       int first_enq, ldlm_error_t *err);
 389
 390 /*
 391  * Iterators.
 392  */
 393
 394 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 395 #define LDLM_ITER_STOP     2 /* stop iterating */
 396
 397 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 398 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 399
 400 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 401                           void *closure);
 402 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 403                            void *closure);
 404 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 405                                ldlm_res_iterator_t iter, void *closure);
 406
 407 int ldlm_replay_locks(struct obd_import *imp);
 408 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 409                         ldlm_iterator_t iter, void *data);
 410
 411 /* ldlm_flock.c */
 412 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 413
 414 /* ldlm_extent.c */
 415 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 416
 417
 418 /* ldlm_lockd.c */
 419 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 420                              void *data, int flag);
 421 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 422 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 423 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 424                         ldlm_blocking_callback, ldlm_glimpse_callback);
 425 int ldlm_handle_convert(struct ptlrpc_request *req);
 426 int ldlm_handle_cancel(struct ptlrpc_request *req);
 427 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 428 int ldlm_get_ref(void);
 429 void ldlm_put_ref(int force);
 430
 431 /* ldlm_lock.c */
 432 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
 433 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
 434 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
 435 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
 436 void ldlm_cancel_callback(struct ldlm_lock *);
 437 int ldlm_lock_set_data(struct lustre_handle *, void *data);
 438 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
 439 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
 440                                       struct lustre_handle *);
 441
 442 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
 443 {
 444         return __ldlm_handle2lock(h, 0);
 445 }
 446
 447 #define LDLM_LOCK_PUT(lock)                     \
 448 do {                                            \
 449         /*LDLM_DEBUG((lock), "put");*/          \
 450         ldlm_lock_put(lock);                    \
 451 } while (0)
 452
 453 #define LDLM_LOCK_GET(lock)                     \
 454 ({                                              \
 455         ldlm_lock_get(lock);                    \
 456         /*LDLM_DEBUG((lock), "get");*/          \
 457         lock;                                   \
 458 })
 459
 460 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 461 void ldlm_lock_put(struct ldlm_lock *lock);
 462 void ldlm_lock_destroy(struct ldlm_lock *lock);
 463 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
 464 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
 465 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
 466 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
 467 void ldlm_lock_allow_match(struct ldlm_lock *lock);
 468 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
 469                     __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
 470                     struct lustre_handle *);
 471 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
 472                                         int *flags);
 473 void ldlm_lock_cancel(struct ldlm_lock *lock);
 474 void ldlm_cancel_locks_for_export(struct obd_export *export);
 475 void ldlm_reprocess_all(struct ldlm_resource *res);
 476 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
 477 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
 478 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
 479
 480 /* ldlm_test.c */
 481 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
 482 int ldlm_regression_start(struct obd_device *obddev,
 483                           struct lustre_handle *connh,
 484                           unsigned int threads, unsigned int max_locks_in,
 485                           unsigned int num_resources_in,
 486                           unsigned int num_extents_in);
 487 int ldlm_regression_stop(void);
 488
 489
 490 /* resource.c */
 491 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
 492 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
 493 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
 494 int ldlm_proc_setup(void);
 495 void ldlm_proc_cleanup(void);
 496
 497 /* resource.c - internal */
 498 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
 499                                         struct ldlm_resource *parent,
 500                                         struct ldlm_res_id, __u32 type,
 501                                         int create);
 502 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
 503 int ldlm_resource_putref(struct ldlm_resource *res);
 504 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
 505                             struct ldlm_lock *lock);
 506 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
 507 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
 508 void ldlm_dump_all_namespaces(void);
 509 void ldlm_namespace_dump(struct ldlm_namespace *);
 510 void ldlm_resource_dump(struct ldlm_resource *);
 511 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
 512                               struct ldlm_res_id);
 513
 514 /* ldlm_request.c */
 515 int ldlm_expired_completion_wait(void *data);
 516 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 517 int ldlm_cli_enqueue(struct obd_export *exp,
 518                      struct ptlrpc_request *req,
 519                      struct ldlm_namespace *ns,
 520                      struct ldlm_res_id,
 521                      __u32 type,
 522                      ldlm_policy_data_t *,
 523                      ldlm_mode_t mode,
 524                      int *flags,
 525                      ldlm_blocking_callback blocking,
 526                      ldlm_completion_callback completion,
 527                      ldlm_glimpse_callback glimpse,
 528                      void *data,
 529                      void *lvb,
 530                      __u32 lvb_len,
 531                      void *lvb_swabber,
 532                      struct lustre_handle *lockh);
 533 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
 534                     void *data, __u32 data_len);
 535 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
 536 int ldlm_cli_cancel(struct lustre_handle *lockh);
 537 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
 538                            int flags, void *opaque);
 539
 540 /* mds/handler.c */
 541 /* This has to be here because recursive inclusion sucks. */
 542 int intent_disposition(struct ldlm_reply *rep, int flag);
 543 void intent_set_disposition(struct ldlm_reply *rep, int flag);
 544 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 545                      void *data, int flag);
 546
 547
 548 /* ioctls for trying requests */
 549 #define IOC_LDLM_TYPE                   'f'
 550 #define IOC_LDLM_MIN_NR                 40
 551
 552 #define IOC_LDLM_TEST                   _IOWR('f', 40, long)
 553 #define IOC_LDLM_DUMP                   _IOWR('f', 41, long)
 554 #define IOC_LDLM_REGRESS_START          _IOWR('f', 42, long)
 555 #define IOC_LDLM_REGRESS_STOP           _IOWR('f', 43, long)
 556 #define IOC_LDLM_MAX_NR                 43
 557
 558 #endif