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
  33         ELDLM_NAMESPACE_EXISTS = 400,
  34         ELDLM_BAD_NAMESPACE    = 401
  35 } ldlm_error_t;
  36
  37 #define LDLM_NAMESPACE_SERVER 0
  38 #define LDLM_NAMESPACE_CLIENT 1
  39
  40 #define LDLM_FL_LOCK_CHANGED   0x000001 /* extent, mode, or resource changed */
  41
  42 /* If the server returns one of these flags, then the lock was put on that list.
  43  * If the client sends one of these flags (during recovery ONLY!), it wants the
  44  * lock added to the specified list, no questions asked. -p */
  45 #define LDLM_FL_BLOCK_GRANTED  0x000002
  46 #define LDLM_FL_BLOCK_CONV     0x000004
  47 #define LDLM_FL_BLOCK_WAIT     0x000008
  48
  49 #define LDLM_FL_CBPENDING      0x000010 /* this lock is being destroyed */
  50 #define LDLM_FL_AST_SENT       0x000020 /* blocking or cancel packet was sent */
  51 #define LDLM_FL_WAIT_NOREPROC  0x000040 /* not a real flag, not saved in lock */
  52 #define LDLM_FL_CANCEL         0x000080 /* cancellation callback already run */
  53
  54 /* Lock is being replayed.  This could probably be implied by the fact that one
  55  * of BLOCK_{GRANTED,CONV,WAIT} is set, but that is pretty dangerous. */
  56 #define LDLM_FL_REPLAY         0x000100
  57
  58 #define LDLM_FL_INTENT_ONLY    0x000200 /* don't grant lock, just do intent */
  59 #define LDLM_FL_LOCAL_ONLY     0x000400 /* see ldlm_cli_cancel_unused */
  60
  61 /* don't run the cancel callback under ldlm_cli_cancel_unused */
  62 #define LDLM_FL_NO_CALLBACK    0x000800
  63
  64 #define LDLM_FL_HAS_INTENT     0x001000 /* lock request has intent */
  65 #define LDLM_FL_CANCELING      0x002000 /* lock cancel has already been sent */
  66 #define LDLM_FL_LOCAL          0x004000 /* local lock (ie, no srv/cli split) */
  67 #define LDLM_FL_WARN           0x008000 /* see ldlm_cli_cancel_unused */
  68 #define LDLM_FL_DISCARD_DATA   0x010000 /* discard (no writeback) on cancel */
  69
  70 /* file & record locking */
  71 #define LDLM_FL_BLOCK_NOWAIT   0x040000 // server told not to wait if blocked
  72 #define LDLM_FL_TEST_LOCK      0x080000 // return blocking lock
  73
  74 /* These are flags that are mapped into the flags and ASTs of blocking locks */
  75 #define LDLM_AST_DISCARD_DATA  0x80000000 /* Add FL_DISCARD to blocking ASTs */
  76 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
  77 #define LDLM_AST_FLAGS         (LDLM_FL_DISCARD_DATA)
  78
  79 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
  80  * the LVB filling happens _after_ the lock has been granted, so another thread
  81  * can match before the LVB has been updated.  As a dirty hack, we set
  82  * LDLM_FL_CAN_MATCH only after we've done the LVB poop.
  83  *
  84  * The proper fix is to do the granting inside of the completion AST, which can
  85  * be replaced with a LVB-aware wrapping function for OSC locks.  That change is
  86  * pretty high-risk, though, and would need a lot more testing. */
  87 #define LDLM_FL_CAN_MATCH      0x100000
  88
  89 /* The blocking callback is overloaded to perform two functions.  These flags
  90  * indicate which operation should be performed. */
  91 #define LDLM_CB_BLOCKING    1
  92 #define LDLM_CB_CANCELING   2
  93
  94 /* compatibility matrix */
  95 #define LCK_COMPAT_EX  LCK_NL
  96 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
  97 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
  98 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
  99 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 100 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 101
 102 static ldlm_mode_t lck_compat_array[] = {
 103         [LCK_EX] LCK_COMPAT_EX,
 104         [LCK_PW] LCK_COMPAT_PW,
 105         [LCK_PR] LCK_COMPAT_PR,
 106         [LCK_CW] LCK_COMPAT_CW,
 107         [LCK_CR] LCK_COMPAT_CR,
 108         [LCK_NL] LCK_COMPAT_NL
 109 };
 110
 111 static inline void lockmode_verify(ldlm_mode_t mode)
 112 {
 113        LASSERT(mode >= LCK_EX && mode <= LCK_NL);
 114 }
 115
 116 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 117 {
 118        return (lck_compat_array[exist] & new);
 119 }
 120
 121 /*
 122  *
 123  * cluster name spaces
 124  *
 125  */
 126
 127 #define DLM_OST_NAMESPACE 1
 128 #define DLM_MDS_NAMESPACE 2
 129
 130 /* XXX
 131    - do we just separate this by security domains and use a prefix for
 132      multiple namespaces in the same domain?
 133    -
 134 */
 135
 136 struct ldlm_lock;
 137 struct ldlm_resource;
 138 struct ldlm_namespace;
 139
 140 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 141                                void *req_cookie, ldlm_mode_t mode, int flags,
 142                                void *data);
 143
 144 struct ldlm_valblock_ops {
 145         int (*lvbo_init)(struct ldlm_resource *res);
 146         int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
 147                            int buf_idx);
 148 };
 149
 150 struct ldlm_namespace {
 151         char                  *ns_name;
 152         __u32                  ns_client; /* is this a client-side lock tree? */
 153         struct list_head      *ns_hash; /* hash table for ns */
 154         __u32                  ns_refcount; /* count of resources in the hash */
 155         struct list_head       ns_root_list; /* all root resources in ns */
 156         struct lustre_lock     ns_lock; /* protects hash, refcount, list */
 157         struct list_head       ns_list_chain; /* position in global NS list */
 158         /*
 159         struct proc_dir_entry *ns_proc_dir;
 160         */
 161
 162         struct list_head       ns_unused_list; /* all root resources in ns */
 163         int                    ns_nr_unused;
 164         unsigned int           ns_max_unused;
 165
 166         spinlock_t             ns_counter_lock;
 167         __u64                  ns_locks;
 168         __u64                  ns_resources;
 169         ldlm_res_policy        ns_policy;
 170         struct ldlm_valblock_ops *ns_lvbo;
 171         void                    *ns_lvbp;
 172 };
 173
 174 /*
 175  *
 176  * Resource hash table
 177  *
 178  */
 179
 180 #define RES_HASH_BITS 10
 181 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 182 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 183
 184 struct ldlm_lock;
 185
 186 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 187                                       struct ldlm_lock_desc *new, void *data,
 188                                       int flag);
 189 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 190                                         void *data);
 191 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 192
 193 struct ldlm_lock {
 194         struct portals_handle l_handle; // must be first in the structure
 195         atomic_t              l_refc;
 196         struct ldlm_resource *l_resource;
 197         struct ldlm_lock     *l_parent;
 198         struct list_head      l_children;
 199         struct list_head      l_childof;
 200         struct list_head      l_lru;
 201         struct list_head      l_res_link; // position in one of three res lists
 202         struct list_head      l_export_chain; // per-export chain of locks
 203
 204         ldlm_mode_t           l_req_mode;
 205         ldlm_mode_t           l_granted_mode;
 206
 207         ldlm_completion_callback l_completion_ast;
 208         ldlm_blocking_callback   l_blocking_ast;
 209         ldlm_glimpse_callback    l_glimpse_ast;
 210
 211         struct obd_export    *l_export;
 212         struct obd_export    *l_conn_export;
 213         __u32                 l_flags;
 214         struct lustre_handle  l_remote_handle;
 215         ldlm_policy_data_t    l_policy_data;
 216
 217         __u32                 l_readers;
 218         __u32                 l_writers;
 219         __u8                  l_destroyed;
 220
 221         /* If the lock is granted, a process sleeps on this waitq to learn when
 222          * it's no longer in use.  If the lock is not granted, a process sleeps
 223          * on this waitq to learn when it becomes granted. */
 224         wait_queue_head_t     l_waitq;
 225         struct timeval        l_enqueued_time;
 226
 227         unsigned long         l_last_used;      /* jiffies */
 228         struct ldlm_extent    l_req_extent;
 229
 230         /* Client-side-only members */
 231         __u32                 l_lvb_len;        /* temporary storage for */
 232         void                 *l_lvb_data;       /* an LVB received during */
 233         void                 *l_lvb_swabber;    /* an enqueue */
 234         void                 *l_ast_data;
 235
 236         /* Server-side-only members */
 237         struct list_head      l_pending_chain;  /* callbacks pending */
 238         unsigned long         l_callback_timeout;
 239 };
 240
 241 #define LDLM_PLAIN       10
 242 #define LDLM_EXTENT      11
 243 #define LDLM_FLOCK       12
 244
 245 #define LDLM_MIN_TYPE 10
 246 #define LDLM_MAX_TYPE 12
 247
 248 struct ldlm_resource {
 249         struct ldlm_namespace *lr_namespace;
 250         struct list_head       lr_hash;
 251         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 252         struct list_head       lr_children; /* list head for child resources */
 253         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 254                                              * part of lr_children if child */
 255
 256         struct list_head       lr_granted;
 257         struct list_head       lr_converting;
 258         struct list_head       lr_waiting;
 259         ldlm_mode_t            lr_most_restr;
 260         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 261         struct ldlm_resource  *lr_root;
 262         struct ldlm_res_id     lr_name;
 263         atomic_t               lr_refcount;
 264
 265         /* Server-side-only lock value block elements */
 266         struct semaphore       lr_lvb_sem;
 267         __u32                  lr_lvb_len;
 268         void                  *lr_lvb_data;
 269
 270         /* lr_tmp holds a list head temporarily, during the building of a work
 271          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 272         void                  *lr_tmp;
 273 };
 274
 275 struct ldlm_ast_work {
 276         struct ldlm_lock *w_lock;
 277         int               w_blocking;
 278         struct ldlm_lock_desc w_desc;
 279         struct list_head   w_list;
 280         int w_flags;
 281         void *w_data;
 282         int w_datalen;
 283 };
 284
 285 extern struct obd_ops ldlm_obd_ops;
 286
 287 extern char *ldlm_lockname[];
 288 extern char *ldlm_typename[];
 289 extern char *ldlm_it2str(int it);
 290
 291 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 292 do {                                                                          \
 293         if (lock->l_resource == NULL) {                                       \
 294                 CDEBUG(level, "### " format                                   \
 295                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 296                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 297                        LPX64" expref: %d\n" , ## a, lock,                     \
 298                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 299                        lock->l_readers, lock->l_writers,                      \
 300                        ldlm_lockname[lock->l_granted_mode],                   \
 301                        ldlm_lockname[lock->l_req_mode],                       \
 302                        lock->l_flags, lock->l_remote_handle.cookie,           \
 303                        lock->l_export ?                                       \
 304                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 305                 break;                                                        \
 306         }                                                                     \
 307         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 308                 CDEBUG(level, "### " format                                   \
 309                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 310                        "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64\
 311                        "] (req "LPU64"->"LPU64") flags: %x remote: "LPX64     \
 312                        " expref: %d\n" , ## a,                                \
 313                        lock->l_resource->lr_namespace->ns_name, lock,         \
 314                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 315                        lock->l_readers, lock->l_writers,                      \
 316                        ldlm_lockname[lock->l_granted_mode],                   \
 317                        ldlm_lockname[lock->l_req_mode],                       \
 318                        lock->l_resource->lr_name.name[0],                     \
 319                        lock->l_resource->lr_name.name[1],                     \
 320                        atomic_read(&lock->l_resource->lr_refcount),           \
 321                        ldlm_typename[lock->l_resource->lr_type],              \
 322                        lock->l_policy_data.l_extent.start,                    \
 323                        lock->l_policy_data.l_extent.end,                      \
 324                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 325                        lock->l_flags, lock->l_remote_handle.cookie,           \
 326                        lock->l_export ?                                       \
 327                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 328                 break;                                                        \
 329         }                                                                     \
 330         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 331                 CDEBUG(level, "### " format                                   \
 332                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 333                        "res: "LPU64"/"LPU64" rrc: %d type: %s pid: %d "       \
 334                        "["LPU64"->"LPU64"] flags: %x remote: "LPX64           \
 335                        " expref: %d\n" , ## a,                                \
 336                        lock->l_resource->lr_namespace->ns_name, lock,         \
 337                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 338                        lock->l_readers, lock->l_writers,                      \
 339                        ldlm_lockname[lock->l_granted_mode],                   \
 340                        ldlm_lockname[lock->l_req_mode],                       \
 341                        lock->l_resource->lr_name.name[0],                     \
 342                        lock->l_resource->lr_name.name[1],                     \
 343                        atomic_read(&lock->l_resource->lr_refcount),           \
 344                        ldlm_typename[lock->l_resource->lr_type],              \
 345                        lock->l_policy_data.l_flock.pid,                       \
 346                        lock->l_policy_data.l_flock.start,                     \
 347                        lock->l_policy_data.l_flock.end,                       \
 348                        lock->l_flags, lock->l_remote_handle.cookie,           \
 349                        lock->l_export ?                                       \
 350                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 351                 break;                                                        \
 352         }                                                                     \
 353         {                                                                     \
 354                 CDEBUG(level, "### " format                                   \
 355                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 356                        "res: "LPU64"/"LPU64" rrc: %d type: %s flags: %x "     \
 357                        "remote: "LPX64" expref: %d\n" , ## a,                 \
 358                        lock->l_resource->lr_namespace->ns_name,               \
 359                        lock, lock->l_handle.h_cookie,                         \
 360                        atomic_read (&lock->l_refc),                           \
 361                        lock->l_readers, lock->l_writers,                      \
 362                        ldlm_lockname[lock->l_granted_mode],                   \
 363                        ldlm_lockname[lock->l_req_mode],                       \
 364                        lock->l_resource->lr_name.name[0],                     \
 365                        lock->l_resource->lr_name.name[1],                     \
 366                        atomic_read(&lock->l_resource->lr_refcount),           \
 367                        ldlm_typename[lock->l_resource->lr_type],              \
 368                        lock->l_flags, lock->l_remote_handle.cookie,           \
 369                        lock->l_export ?                                       \
 370                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 371         }                                                                     \
 372 } while (0)
 373
 374 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 375                                                     format, ## a)
 376 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 377
 378 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 379         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 380
 381 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 382                                       int first_enq, ldlm_error_t *err);
 383
 384 /*
 385  * Iterators.
 386  */
 387
 388 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 389 #define LDLM_ITER_STOP     2 /* stop iterating */
 390
 391 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 392 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 393
 394 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 395                           void *closure);
 396 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 397                            void *closure);
 398 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 399                                ldlm_res_iterator_t iter, void *closure);
 400
 401 int ldlm_replay_locks(struct obd_import *imp);
 402 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 403                         ldlm_iterator_t iter, void *data);
 404
 405 /* ldlm_flock.c */
 406 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 407
 408 /* ldlm_extent.c */
 409 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 410
 411
 412 /* ldlm_lockd.c */
 413 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 414                              void *data, int flag);
 415 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 416 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 417 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 418                         ldlm_blocking_callback, ldlm_glimpse_callback);
 419 int ldlm_handle_convert(struct ptlrpc_request *req);
 420 int ldlm_handle_cancel(struct ptlrpc_request *req);
 421 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 422 int ldlm_get_ref(void);
 423 void ldlm_put_ref(int force);
 424
 425 /* ldlm_lock.c */
 426 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
 427 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
 428 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
 429 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
 430 void ldlm_cancel_callback(struct ldlm_lock *);
 431 int ldlm_lock_set_data(struct lustre_handle *, void *data);
 432 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
 433 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
 434                                       struct lustre_handle *);
 435
 436 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
 437 {
 438         return __ldlm_handle2lock(h, 0);
 439 }
 440
 441 #define LDLM_LOCK_PUT(lock)                     \
 442 do {                                            \
 443         /*LDLM_DEBUG((lock), "put");*/          \
 444         ldlm_lock_put(lock);                    \
 445 } while (0)
 446
 447 #define LDLM_LOCK_GET(lock)                     \
 448 ({                                              \
 449         ldlm_lock_get(lock);                    \
 450         /*LDLM_DEBUG((lock), "get");*/          \
 451         lock;                                   \
 452 })
 453
 454 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 455 void ldlm_lock_put(struct ldlm_lock *lock);
 456 void ldlm_lock_destroy(struct ldlm_lock *lock);
 457 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
 458 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
 459 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
 460 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
 461 void ldlm_lock_allow_match(struct ldlm_lock *lock);
 462 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
 463                     __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
 464                     struct lustre_handle *);
 465 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
 466                                         int *flags);
 467 void ldlm_lock_cancel(struct ldlm_lock *lock);
 468 void ldlm_cancel_locks_for_export(struct obd_export *export);
 469 void ldlm_reprocess_all(struct ldlm_resource *res);
 470 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
 471 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
 472 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
 473
 474 /* ldlm_test.c */
 475 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
 476 int ldlm_regression_start(struct obd_device *obddev,
 477                           struct lustre_handle *connh,
 478                           unsigned int threads, unsigned int max_locks_in,
 479                           unsigned int num_resources_in,
 480                           unsigned int num_extents_in);
 481 int ldlm_regression_stop(void);
 482
 483
 484 /* resource.c */
 485 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
 486 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
 487 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
 488 int ldlm_proc_setup(void);
 489 void ldlm_proc_cleanup(void);
 490
 491 /* resource.c - internal */
 492 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
 493                                         struct ldlm_resource *parent,
 494                                         struct ldlm_res_id, __u32 type,
 495                                         int create);
 496 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
 497 int ldlm_resource_putref(struct ldlm_resource *res);
 498 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
 499                             struct ldlm_lock *lock);
 500 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
 501 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
 502 void ldlm_dump_all_namespaces(void);
 503 void ldlm_namespace_dump(struct ldlm_namespace *);
 504 void ldlm_resource_dump(struct ldlm_resource *);
 505 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
 506                               struct ldlm_res_id);
 507
 508 /* ldlm_request.c */
 509 int ldlm_expired_completion_wait(void *data);
 510 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 511 int ldlm_cli_enqueue(struct obd_export *exp,
 512                      struct ptlrpc_request *req,
 513                      struct ldlm_namespace *ns,
 514                      struct ldlm_res_id,
 515                      __u32 type,
 516                      ldlm_policy_data_t *,
 517                      ldlm_mode_t mode,
 518                      int *flags,
 519                      ldlm_blocking_callback blocking,
 520                      ldlm_completion_callback completion,
 521                      ldlm_glimpse_callback glimpse,
 522                      void *data,
 523                      void *lvb,
 524                      __u32 lvb_len,
 525                      void *lvb_swabber,
 526                      struct lustre_handle *lockh);
 527 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
 528                     void *data, __u32 data_len);
 529 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
 530 int ldlm_cli_cancel(struct lustre_handle *lockh);
 531 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
 532                            int flags, void *opaque);
 533
 534 /* mds/handler.c */
 535 /* This has to be here because recursive inclusion sucks. */
 536 int intent_disposition(struct ldlm_reply *rep, int flag);
 537 void intent_set_disposition(struct ldlm_reply *rep, int flag);
 538 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 539                      void *data, int flag);
 540
 541
 542 /* ioctls for trying requests */
 543 #define IOC_LDLM_TYPE                   'f'
 544 #define IOC_LDLM_MIN_NR                 40
 545
 546 #define IOC_LDLM_TEST                   _IOWR('f', 40, long)
 547 #define IOC_LDLM_DUMP                   _IOWR('f', 41, long)
 548 #define IOC_LDLM_REGRESS_START          _IOWR('f', 42, long)
 549 #define IOC_LDLM_REGRESS_STOP           _IOWR('f', 43, long)
 550 #define IOC_LDLM_MAX_NR                 43
 551
 552 #endif