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_NO_CALLBACK    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 /* A lock contributes to the kms calculation until it has finished the part
  91  * of it's cancelation that performs write back on its dirty pages.  It
  92  * can remain on the granted list during this whole time.  Threads racing
  93  * to update the kms after performing their writeback need to know to
  94  * exclude each others locks from the calculation as they walk the granted
  95  * list. */
  96 #define LDLM_FL_KMS_IGNORE     0x200000
  97
  98 /* The blocking callback is overloaded to perform two functions.  These flags
  99  * indicate which operation should be performed. */
 100 #define LDLM_CB_BLOCKING    1
 101 #define LDLM_CB_CANCELING   2
 102
 103 /* compatibility matrix */
 104 #define LCK_COMPAT_EX  LCK_NL
 105 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
 106 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
 107 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
 108 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 109 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 110
 111 static ldlm_mode_t lck_compat_array[] = {
 112         [LCK_EX] LCK_COMPAT_EX,
 113         [LCK_PW] LCK_COMPAT_PW,
 114         [LCK_PR] LCK_COMPAT_PR,
 115         [LCK_CW] LCK_COMPAT_CW,
 116         [LCK_CR] LCK_COMPAT_CR,
 117         [LCK_NL] LCK_COMPAT_NL
 118 };
 119
 120 static inline void lockmode_verify(ldlm_mode_t mode)
 121 {
 122        LASSERT(mode >= LCK_EX && mode <= LCK_NL);
 123 }
 124
 125 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 126 {
 127        return (lck_compat_array[exist] & new);
 128 }
 129
 130 /*
 131  *
 132  * cluster name spaces
 133  *
 134  */
 135
 136 #define DLM_OST_NAMESPACE 1
 137 #define DLM_MDS_NAMESPACE 2
 138
 139 /* XXX
 140    - do we just separate this by security domains and use a prefix for
 141      multiple namespaces in the same domain?
 142    -
 143 */
 144
 145 struct ldlm_lock;
 146 struct ldlm_resource;
 147 struct ldlm_namespace;
 148
 149 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 150                                void *req_cookie, ldlm_mode_t mode, int flags,
 151                                void *data);
 152
 153 struct ldlm_valblock_ops {
 154         int (*lvbo_init)(struct ldlm_resource *res);
 155         int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
 156                            int buf_idx, int increase);
 157 };
 158
 159 struct ldlm_namespace {
 160         char                  *ns_name;
 161         __u32                  ns_client; /* is this a client-side lock tree? */
 162         struct list_head      *ns_hash; /* hash table for ns */
 163         __u32                  ns_refcount; /* count of resources in the hash */
 164         struct list_head       ns_root_list; /* all root resources in ns */
 165         struct lustre_lock     ns_lock; /* protects hash, refcount, list */
 166         struct list_head       ns_list_chain; /* position in global NS list */
 167         /*
 168         struct proc_dir_entry *ns_proc_dir;
 169         */
 170
 171         struct list_head       ns_unused_list; /* all root resources in ns */
 172         int                    ns_nr_unused;
 173         unsigned int           ns_max_unused;
 174
 175         spinlock_t             ns_counter_lock;
 176         __u64                  ns_locks;
 177         __u64                  ns_resources;
 178         ldlm_res_policy        ns_policy;
 179         struct ldlm_valblock_ops *ns_lvbo;
 180         void                    *ns_lvbp;
 181 };
 182
 183 /*
 184  *
 185  * Resource hash table
 186  *
 187  */
 188
 189 #define RES_HASH_BITS 10
 190 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 191 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 192
 193 struct ldlm_lock;
 194
 195 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 196                                       struct ldlm_lock_desc *new, void *data,
 197                                       int flag);
 198 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 199                                         void *data);
 200 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 201
 202 struct ldlm_lock {
 203         struct portals_handle l_handle; // must be first in the structure
 204         atomic_t              l_refc;
 205         struct ldlm_resource *l_resource;
 206         struct ldlm_lock     *l_parent;
 207         struct list_head      l_children;
 208         struct list_head      l_childof;
 209         struct list_head      l_lru;
 210         struct list_head      l_res_link; // position in one of three res lists
 211         struct list_head      l_export_chain; // per-export chain of locks
 212
 213         ldlm_mode_t           l_req_mode;
 214         ldlm_mode_t           l_granted_mode;
 215
 216         ldlm_completion_callback l_completion_ast;
 217         ldlm_blocking_callback   l_blocking_ast;
 218         ldlm_glimpse_callback    l_glimpse_ast;
 219
 220         struct obd_export    *l_export;
 221         struct obd_export    *l_conn_export;
 222         __u32                 l_flags;
 223         struct lustre_handle  l_remote_handle;
 224         ldlm_policy_data_t    l_policy_data;
 225
 226         __u32                 l_readers;
 227         __u32                 l_writers;
 228         __u8                  l_destroyed;
 229
 230         /* If the lock is granted, a process sleeps on this waitq to learn when
 231          * it's no longer in use.  If the lock is not granted, a process sleeps
 232          * on this waitq to learn when it becomes granted. */
 233         wait_queue_head_t     l_waitq;
 234         struct timeval        l_enqueued_time;
 235
 236         unsigned long         l_last_used;      /* jiffies */
 237         struct ldlm_extent    l_req_extent;
 238
 239         /* Client-side-only members */
 240         __u32                 l_lvb_len;        /* temporary storage for */
 241         void                 *l_lvb_data;       /* an LVB received during */
 242         void                 *l_lvb_swabber;    /* an enqueue */
 243         void                 *l_ast_data;
 244
 245         /* Server-side-only members */
 246         struct list_head      l_pending_chain;  /* callbacks pending */
 247         unsigned long         l_callback_timeout;
 248 };
 249
 250 #define LDLM_PLAIN       10
 251 #define LDLM_EXTENT      11
 252 #define LDLM_FLOCK       12
 253
 254 #define LDLM_MIN_TYPE 10
 255 #define LDLM_MAX_TYPE 12
 256
 257 struct ldlm_resource {
 258         struct ldlm_namespace *lr_namespace;
 259         struct list_head       lr_hash;
 260         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 261         struct list_head       lr_children; /* list head for child resources */
 262         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 263                                              * part of lr_children if child */
 264
 265         struct list_head       lr_granted;
 266         struct list_head       lr_converting;
 267         struct list_head       lr_waiting;
 268         ldlm_mode_t            lr_most_restr;
 269         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 270         struct ldlm_resource  *lr_root;
 271         struct ldlm_res_id     lr_name;
 272         atomic_t               lr_refcount;
 273
 274         /* Server-side-only lock value block elements */
 275         struct semaphore       lr_lvb_sem;
 276         __u32                  lr_lvb_len;
 277         void                  *lr_lvb_data;
 278
 279         /* lr_tmp holds a list head temporarily, during the building of a work
 280          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 281         void                  *lr_tmp;
 282 };
 283
 284 struct ldlm_ast_work {
 285         struct ldlm_lock *w_lock;
 286         int               w_blocking;
 287         struct ldlm_lock_desc w_desc;
 288         struct list_head   w_list;
 289         int w_flags;
 290         void *w_data;
 291         int w_datalen;
 292 };
 293
 294 extern struct obd_ops ldlm_obd_ops;
 295
 296 extern char *ldlm_lockname[];
 297 extern char *ldlm_typename[];
 298 extern char *ldlm_it2str(int it);
 299
 300 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 301 do {                                                                          \
 302         if (lock->l_resource == NULL) {                                       \
 303                 CDEBUG(level, "### " format                                   \
 304                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 305                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 306                        LPX64" expref: %d\n" , ## a, lock,                     \
 307                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 308                        lock->l_readers, lock->l_writers,                      \
 309                        ldlm_lockname[lock->l_granted_mode],                   \
 310                        ldlm_lockname[lock->l_req_mode],                       \
 311                        lock->l_flags, lock->l_remote_handle.cookie,           \
 312                        lock->l_export ?                                       \
 313                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 314                 break;                                                        \
 315         }                                                                     \
 316         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 317                 CDEBUG(level, "### " format                                   \
 318                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 319                        "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64\
 320                        "] (req "LPU64"->"LPU64") flags: %x remote: "LPX64     \
 321                        " expref: %d\n" , ## a,                                \
 322                        lock->l_resource->lr_namespace->ns_name, lock,         \
 323                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 324                        lock->l_readers, lock->l_writers,                      \
 325                        ldlm_lockname[lock->l_granted_mode],                   \
 326                        ldlm_lockname[lock->l_req_mode],                       \
 327                        lock->l_resource->lr_name.name[0],                     \
 328                        lock->l_resource->lr_name.name[1],                     \
 329                        atomic_read(&lock->l_resource->lr_refcount),           \
 330                        ldlm_typename[lock->l_resource->lr_type],              \
 331                        lock->l_policy_data.l_extent.start,                    \
 332                        lock->l_policy_data.l_extent.end,                      \
 333                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 334                        lock->l_flags, lock->l_remote_handle.cookie,           \
 335                        lock->l_export ?                                       \
 336                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 337                 break;                                                        \
 338         }                                                                     \
 339         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 340                 CDEBUG(level, "### " format                                   \
 341                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 342                        "res: "LPU64"/"LPU64" rrc: %d type: %s pid: %d "       \
 343                        "["LPU64"->"LPU64"] flags: %x remote: "LPX64           \
 344                        " expref: %d\n" , ## a,                                \
 345                        lock->l_resource->lr_namespace->ns_name, lock,         \
 346                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 347                        lock->l_readers, lock->l_writers,                      \
 348                        ldlm_lockname[lock->l_granted_mode],                   \
 349                        ldlm_lockname[lock->l_req_mode],                       \
 350                        lock->l_resource->lr_name.name[0],                     \
 351                        lock->l_resource->lr_name.name[1],                     \
 352                        atomic_read(&lock->l_resource->lr_refcount),           \
 353                        ldlm_typename[lock->l_resource->lr_type],              \
 354                        lock->l_policy_data.l_flock.pid,                       \
 355                        lock->l_policy_data.l_flock.start,                     \
 356                        lock->l_policy_data.l_flock.end,                       \
 357                        lock->l_flags, lock->l_remote_handle.cookie,           \
 358                        lock->l_export ?                                       \
 359                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 360                 break;                                                        \
 361         }                                                                     \
 362         {                                                                     \
 363                 CDEBUG(level, "### " format                                   \
 364                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 365                        "res: "LPU64"/"LPU64" rrc: %d type: %s flags: %x "     \
 366                        "remote: "LPX64" expref: %d\n" , ## a,                 \
 367                        lock->l_resource->lr_namespace->ns_name,               \
 368                        lock, lock->l_handle.h_cookie,                         \
 369                        atomic_read (&lock->l_refc),                           \
 370                        lock->l_readers, lock->l_writers,                      \
 371                        ldlm_lockname[lock->l_granted_mode],                   \
 372                        ldlm_lockname[lock->l_req_mode],                       \
 373                        lock->l_resource->lr_name.name[0],                     \
 374                        lock->l_resource->lr_name.name[1],                     \
 375                        atomic_read(&lock->l_resource->lr_refcount),           \
 376                        ldlm_typename[lock->l_resource->lr_type],              \
 377                        lock->l_flags, lock->l_remote_handle.cookie,           \
 378                        lock->l_export ?                                       \
 379                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 380         }                                                                     \
 381 } while (0)
 382
 383 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 384                                                     format, ## a)
 385 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 386
 387 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 388         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 389
 390 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 391                                       int first_enq, ldlm_error_t *err);
 392
 393 /*
 394  * Iterators.
 395  */
 396
 397 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 398 #define LDLM_ITER_STOP     2 /* stop iterating */
 399
 400 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 401 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 402
 403 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 404                           void *closure);
 405 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 406                            void *closure);
 407 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 408                                ldlm_res_iterator_t iter, void *closure);
 409
 410 int ldlm_replay_locks(struct obd_import *imp);
 411 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 412                         ldlm_iterator_t iter, void *data);
 413
 414 /* ldlm_flock.c */
 415 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 416
 417 /* ldlm_extent.c */
 418 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 419
 420
 421 /* ldlm_lockd.c */
 422 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 423                              void *data, int flag);
 424 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 425 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 426 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 427                         ldlm_blocking_callback, ldlm_glimpse_callback);
 428 int ldlm_handle_convert(struct ptlrpc_request *req);
 429 int ldlm_handle_cancel(struct ptlrpc_request *req);
 430 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 431 int ldlm_get_ref(void);
 432 void ldlm_put_ref(int force);
 433
 434 /* ldlm_lock.c */
 435 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
 436 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
 437 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
 438 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
 439 void ldlm_cancel_callback(struct ldlm_lock *);
 440 int ldlm_lock_set_data(struct lustre_handle *, void *data);
 441 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
 442 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
 443                                       struct lustre_handle *);
 444
 445 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
 446 {
 447         return __ldlm_handle2lock(h, 0);
 448 }
 449
 450 #define LDLM_LOCK_PUT(lock)                     \
 451 do {                                            \
 452         /*LDLM_DEBUG((lock), "put");*/          \
 453         ldlm_lock_put(lock);                    \
 454 } while (0)
 455
 456 #define LDLM_LOCK_GET(lock)                     \
 457 ({                                              \
 458         ldlm_lock_get(lock);                    \
 459         /*LDLM_DEBUG((lock), "get");*/          \
 460         lock;                                   \
 461 })
 462
 463 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 464 void ldlm_lock_put(struct ldlm_lock *lock);
 465 void ldlm_lock_destroy(struct ldlm_lock *lock);
 466 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
 467 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
 468 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
 469 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
 470 void ldlm_lock_allow_match(struct ldlm_lock *lock);
 471 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
 472                     __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
 473                     struct lustre_handle *);
 474 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
 475                                         int *flags);
 476 void ldlm_lock_cancel(struct ldlm_lock *lock);
 477 void ldlm_cancel_locks_for_export(struct obd_export *export);
 478 void ldlm_reprocess_all(struct ldlm_resource *res);
 479 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
 480 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
 481 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
 482
 483 /* ldlm_test.c */
 484 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
 485 int ldlm_regression_start(struct obd_device *obddev,
 486                           struct lustre_handle *connh,
 487                           unsigned int threads, unsigned int max_locks_in,
 488                           unsigned int num_resources_in,
 489                           unsigned int num_extents_in);
 490 int ldlm_regression_stop(void);
 491
 492
 493 /* resource.c */
 494 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
 495 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
 496 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
 497 int ldlm_proc_setup(void);
 498 void ldlm_proc_cleanup(void);
 499
 500 /* resource.c - internal */
 501 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
 502                                         struct ldlm_resource *parent,
 503                                         struct ldlm_res_id, __u32 type,
 504                                         int create);
 505 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
 506 int ldlm_resource_putref(struct ldlm_resource *res);
 507 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
 508                             struct ldlm_lock *lock);
 509 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
 510 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
 511 void ldlm_dump_all_namespaces(void);
 512 void ldlm_namespace_dump(struct ldlm_namespace *);
 513 void ldlm_resource_dump(struct ldlm_resource *);
 514 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
 515                               struct ldlm_res_id);
 516
 517 /* ldlm_request.c */
 518 int ldlm_expired_completion_wait(void *data);
 519 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 520 int ldlm_cli_enqueue(struct obd_export *exp,
 521                      struct ptlrpc_request *req,
 522                      struct ldlm_namespace *ns,
 523                      struct ldlm_res_id,
 524                      __u32 type,
 525                      ldlm_policy_data_t *,
 526                      ldlm_mode_t mode,
 527                      int *flags,
 528                      ldlm_blocking_callback blocking,
 529                      ldlm_completion_callback completion,
 530                      ldlm_glimpse_callback glimpse,
 531                      void *data,
 532                      void *lvb,
 533                      __u32 lvb_len,
 534                      void *lvb_swabber,
 535                      struct lustre_handle *lockh);
 536 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
 537                     void *data, __u32 data_len);
 538 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
 539 int ldlm_cli_cancel(struct lustre_handle *lockh);
 540 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
 541                            int flags, void *opaque);
 542
 543 /* mds/handler.c */
 544 /* This has to be here because recursive inclusion sucks. */
 545 int intent_disposition(struct ldlm_reply *rep, int flag);
 546 void intent_set_disposition(struct ldlm_reply *rep, int flag);
 547 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 548                      void *data, int flag);
 549
 550
 551 /* ioctls for trying requests */
 552 #define IOC_LDLM_TYPE                   'f'
 553 #define IOC_LDLM_MIN_NR                 40
 554
 555 #define IOC_LDLM_TEST                   _IOWR('f', 40, long)
 556 #define IOC_LDLM_DUMP                   _IOWR('f', 41, long)
 557 #define IOC_LDLM_REGRESS_START          _IOWR('f', 42, long)
 558 #define IOC_LDLM_REGRESS_STOP           _IOWR('f', 43, long)
 559 #define IOC_LDLM_MAX_NR                 43
 560
 561 #endif