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 /* file & record locking */
  72 #define LDLM_FL_BLOCK_NOWAIT   0x040000 // server told not to wait if blocked
  73 #define LDLM_FL_TEST_LOCK      0x080000 // return blocking lock
  74
  75 /* These are flags that are mapped into the flags and ASTs of blocking locks */
  76 #define LDLM_AST_DISCARD_DATA  0x80000000 /* Add FL_DISCARD to blocking ASTs */
  77 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
  78 #define LDLM_AST_FLAGS         (LDLM_FL_DISCARD_DATA)
  79
  80 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
  81  * the LVB filling happens _after_ the lock has been granted, so another thread
  82  * can match before the LVB has been updated.  As a dirty hack, we set
  83  * LDLM_FL_CAN_MATCH only after we've done the LVB poop.
  84  *
  85  * The proper fix is to do the granting inside of the completion AST, which can
  86  * be replaced with a LVB-aware wrapping function for OSC locks.  That change is
  87  * pretty high-risk, though, and would need a lot more testing. */
  88 #define LDLM_FL_CAN_MATCH      0x100000
  89
  90 /* The blocking callback is overloaded to perform two functions.  These flags
  91  * indicate which operation should be performed. */
  92 #define LDLM_CB_BLOCKING    1
  93 #define LDLM_CB_CANCELING   2
  94
  95 /* compatibility matrix */
  96 #define LCK_COMPAT_EX  LCK_NL
  97 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
  98 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
  99 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
 100 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 101 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 102
 103 static ldlm_mode_t lck_compat_array[] = {
 104         [LCK_EX] LCK_COMPAT_EX,
 105         [LCK_PW] LCK_COMPAT_PW,
 106         [LCK_PR] LCK_COMPAT_PR,
 107         [LCK_CW] LCK_COMPAT_CW,
 108         [LCK_CR] LCK_COMPAT_CR,
 109         [LCK_NL] LCK_COMPAT_NL
 110 };
 111
 112 static inline void lockmode_verify(ldlm_mode_t mode)
 113 {
 114        LASSERT(mode >= LCK_EX && mode <= LCK_NL);
 115 }
 116
 117 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 118 {
 119        return (lck_compat_array[exist] & new);
 120 }
 121
 122 /*
 123  *
 124  * cluster name spaces
 125  *
 126  */
 127
 128 #define DLM_OST_NAMESPACE 1
 129 #define DLM_MDS_NAMESPACE 2
 130
 131 /* XXX
 132    - do we just separate this by security domains and use a prefix for
 133      multiple namespaces in the same domain?
 134    -
 135 */
 136
 137 struct ldlm_lock;
 138 struct ldlm_resource;
 139 struct ldlm_namespace;
 140
 141 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 142                                void *req_cookie, ldlm_mode_t mode, int flags,
 143                                void *data);
 144
 145 struct ldlm_valblock_ops {
 146         int (*lvbo_init)(struct ldlm_resource *res);
 147         int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
 148                            int buf_idx, int increase);
 149 };
 150
 151 struct ldlm_namespace {
 152         char                  *ns_name;
 153         __u32                  ns_client; /* is this a client-side lock tree? */
 154         struct list_head      *ns_hash; /* hash table for ns */
 155         __u32                  ns_refcount; /* count of resources in the hash */
 156         struct list_head       ns_root_list; /* all root resources in ns */
 157         struct lustre_lock     ns_lock; /* protects hash, refcount, list */
 158         struct list_head       ns_list_chain; /* position in global NS list */
 159         /*
 160         struct proc_dir_entry *ns_proc_dir;
 161         */
 162
 163         struct list_head       ns_unused_list; /* all root resources in ns */
 164         int                    ns_nr_unused;
 165         unsigned int           ns_max_unused;
 166
 167         spinlock_t             ns_counter_lock;
 168         __u64                  ns_locks;
 169         __u64                  ns_resources;
 170         ldlm_res_policy        ns_policy;
 171         struct ldlm_valblock_ops *ns_lvbo;
 172         void                    *ns_lvbp;
 173 };
 174
 175 /*
 176  *
 177  * Resource hash table
 178  *
 179  */
 180
 181 #define RES_HASH_BITS 10
 182 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 183 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 184
 185 struct ldlm_lock;
 186
 187 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 188                                       struct ldlm_lock_desc *new, void *data,
 189                                       int flag);
 190 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 191                                         void *data);
 192 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 193
 194 struct ldlm_lock {
 195         struct portals_handle l_handle; // must be first in the structure
 196         atomic_t              l_refc;
 197         struct ldlm_resource *l_resource;
 198         struct ldlm_lock     *l_parent;
 199         struct list_head      l_children;
 200         struct list_head      l_childof;
 201         struct list_head      l_lru;
 202         struct list_head      l_res_link; // position in one of three res lists
 203         struct list_head      l_export_chain; // per-export chain of locks
 204
 205         ldlm_mode_t           l_req_mode;
 206         ldlm_mode_t           l_granted_mode;
 207
 208         ldlm_completion_callback l_completion_ast;
 209         ldlm_blocking_callback   l_blocking_ast;
 210         ldlm_glimpse_callback    l_glimpse_ast;
 211
 212         struct obd_export    *l_export;
 213         struct obd_export    *l_conn_export;
 214         __u32                 l_flags;
 215         struct lustre_handle  l_remote_handle;
 216         ldlm_policy_data_t    l_policy_data;
 217
 218         __u32                 l_readers;
 219         __u32                 l_writers;
 220         __u8                  l_destroyed;
 221
 222         /* If the lock is granted, a process sleeps on this waitq to learn when
 223          * it's no longer in use.  If the lock is not granted, a process sleeps
 224          * on this waitq to learn when it becomes granted. */
 225         wait_queue_head_t     l_waitq;
 226         struct timeval        l_enqueued_time;
 227
 228         unsigned long         l_last_used;      /* jiffies */
 229         struct ldlm_extent    l_req_extent;
 230
 231         /* Client-side-only members */
 232         __u32                 l_lvb_len;        /* temporary storage for */
 233         void                 *l_lvb_data;       /* an LVB received during */
 234         void                 *l_lvb_swabber;    /* an enqueue */
 235         void                 *l_ast_data;
 236
 237         /* Server-side-only members */
 238         struct list_head      l_pending_chain;  /* callbacks pending */
 239         unsigned long         l_callback_timeout;
 240 };
 241
 242 #define LDLM_PLAIN       10
 243 #define LDLM_EXTENT      11
 244 #define LDLM_FLOCK       12
 245
 246 #define LDLM_MIN_TYPE 10
 247 #define LDLM_MAX_TYPE 12
 248
 249 struct ldlm_resource {
 250         struct ldlm_namespace *lr_namespace;
 251         struct list_head       lr_hash;
 252         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 253         struct list_head       lr_children; /* list head for child resources */
 254         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 255                                              * part of lr_children if child */
 256
 257         struct list_head       lr_granted;
 258         struct list_head       lr_converting;
 259         struct list_head       lr_waiting;
 260         ldlm_mode_t            lr_most_restr;
 261         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 262         struct ldlm_resource  *lr_root;
 263         struct ldlm_res_id     lr_name;
 264         atomic_t               lr_refcount;
 265
 266         /* Server-side-only lock value block elements */
 267         struct semaphore       lr_lvb_sem;
 268         __u32                  lr_lvb_len;
 269         void                  *lr_lvb_data;
 270
 271         /* lr_tmp holds a list head temporarily, during the building of a work
 272          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 273         void                  *lr_tmp;
 274 };
 275
 276 struct ldlm_ast_work {
 277         struct ldlm_lock *w_lock;
 278         int               w_blocking;
 279         struct ldlm_lock_desc w_desc;
 280         struct list_head   w_list;
 281         int w_flags;
 282         void *w_data;
 283         int w_datalen;
 284 };
 285
 286 extern struct obd_ops ldlm_obd_ops;
 287
 288 extern char *ldlm_lockname[];
 289 extern char *ldlm_typename[];
 290 extern char *ldlm_it2str(int it);
 291
 292 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 293 do {                                                                          \
 294         if (lock->l_resource == NULL) {                                       \
 295                 CDEBUG(level, "### " format                                   \
 296                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 297                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 298                        LPX64" expref: %d\n" , ## a, lock,                     \
 299                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 300                        lock->l_readers, lock->l_writers,                      \
 301                        ldlm_lockname[lock->l_granted_mode],                   \
 302                        ldlm_lockname[lock->l_req_mode],                       \
 303                        lock->l_flags, lock->l_remote_handle.cookie,           \
 304                        lock->l_export ?                                       \
 305                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 306                 break;                                                        \
 307         }                                                                     \
 308         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 309                 CDEBUG(level, "### " format                                   \
 310                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 311                        "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64\
 312                        "] (req "LPU64"->"LPU64") flags: %x remote: "LPX64     \
 313                        " expref: %d\n" , ## a,                                \
 314                        lock->l_resource->lr_namespace->ns_name, 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_resource->lr_name.name[0],                     \
 320                        lock->l_resource->lr_name.name[1],                     \
 321                        atomic_read(&lock->l_resource->lr_refcount),           \
 322                        ldlm_typename[lock->l_resource->lr_type],              \
 323                        lock->l_policy_data.l_extent.start,                    \
 324                        lock->l_policy_data.l_extent.end,                      \
 325                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 326                        lock->l_flags, lock->l_remote_handle.cookie,           \
 327                        lock->l_export ?                                       \
 328                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 329                 break;                                                        \
 330         }                                                                     \
 331         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 332                 CDEBUG(level, "### " format                                   \
 333                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 334                        "res: "LPU64"/"LPU64" rrc: %d type: %s pid: %d "       \
 335                        "["LPU64"->"LPU64"] flags: %x remote: "LPX64           \
 336                        " expref: %d\n" , ## a,                                \
 337                        lock->l_resource->lr_namespace->ns_name, lock,         \
 338                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 339                        lock->l_readers, lock->l_writers,                      \
 340                        ldlm_lockname[lock->l_granted_mode],                   \
 341                        ldlm_lockname[lock->l_req_mode],                       \
 342                        lock->l_resource->lr_name.name[0],                     \
 343                        lock->l_resource->lr_name.name[1],                     \
 344                        atomic_read(&lock->l_resource->lr_refcount),           \
 345                        ldlm_typename[lock->l_resource->lr_type],              \
 346                        lock->l_policy_data.l_flock.pid,                       \
 347                        lock->l_policy_data.l_flock.start,                     \
 348                        lock->l_policy_data.l_flock.end,                       \
 349                        lock->l_flags, lock->l_remote_handle.cookie,           \
 350                        lock->l_export ?                                       \
 351                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 352                 break;                                                        \
 353         }                                                                     \
 354         {                                                                     \
 355                 CDEBUG(level, "### " format                                   \
 356                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 357                        "res: "LPU64"/"LPU64" rrc: %d type: %s flags: %x "     \
 358                        "remote: "LPX64" expref: %d\n" , ## a,                 \
 359                        lock->l_resource->lr_namespace->ns_name,               \
 360                        lock, lock->l_handle.h_cookie,                         \
 361                        atomic_read (&lock->l_refc),                           \
 362                        lock->l_readers, lock->l_writers,                      \
 363                        ldlm_lockname[lock->l_granted_mode],                   \
 364                        ldlm_lockname[lock->l_req_mode],                       \
 365                        lock->l_resource->lr_name.name[0],                     \
 366                        lock->l_resource->lr_name.name[1],                     \
 367                        atomic_read(&lock->l_resource->lr_refcount),           \
 368                        ldlm_typename[lock->l_resource->lr_type],              \
 369                        lock->l_flags, lock->l_remote_handle.cookie,           \
 370                        lock->l_export ?                                       \
 371                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 372         }                                                                     \
 373 } while (0)
 374
 375 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 376                                                     format, ## a)
 377 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 378
 379 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 380         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 381
 382 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 383                                       int first_enq, ldlm_error_t *err);
 384
 385 /*
 386  * Iterators.
 387  */
 388
 389 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 390 #define LDLM_ITER_STOP     2 /* stop iterating */
 391
 392 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 393 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 394
 395 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 396                           void *closure);
 397 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 398                            void *closure);
 399 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 400                                ldlm_res_iterator_t iter, void *closure);
 401
 402 int ldlm_replay_locks(struct obd_import *imp);
 403 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 404                         ldlm_iterator_t iter, void *data);
 405
 406 /* ldlm_flock.c */
 407 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 408
 409 /* ldlm_extent.c */
 410 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 411
 412
 413 /* ldlm_lockd.c */
 414 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 415                              void *data, int flag);
 416 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 417 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 418 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 419                         ldlm_blocking_callback, ldlm_glimpse_callback);
 420 int ldlm_handle_convert(struct ptlrpc_request *req);
 421 int ldlm_handle_cancel(struct ptlrpc_request *req);
 422 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 423 int ldlm_get_ref(void);
 424 void ldlm_put_ref(int force);
 425 #ifndef __KERNEL__
 426 void liblustre_ldlm_handle_bl_callback(struct ldlm_namespace *ns,
 427                                        struct ldlm_lock_desc *ld,
 428                                        struct ldlm_lock *lock);
 429 #endif
 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