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 /* A lock contributes to the kms calculation until it has finished the part
  94  * of it's cancelation that performs write back on its dirty pages.  It
  95  * can remain on the granted list during this whole time.  Threads racing
  96  * to update the kms after performing their writeback need to know to
  97  * exclude each others locks from the calculation as they walk the granted
  98  * list. */
  99 #define LDLM_FL_KMS_IGNORE     0x200000
 100
 101 /* The blocking callback is overloaded to perform two functions.  These flags
 102  * indicate which operation should be performed. */
 103 #define LDLM_CB_BLOCKING    1
 104 #define LDLM_CB_CANCELING   2
 105
 106 /* compatibility matrix */
 107 #define LCK_COMPAT_EX  LCK_NL
 108 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
 109 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
 110 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
 111 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 112 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 113 #define LCK_COMPAT_GROUP  (LCK_GROUP | LCK_NL)
 114
 115 static ldlm_mode_t lck_compat_array[] = {
 116         [LCK_EX] LCK_COMPAT_EX,
 117         [LCK_PW] LCK_COMPAT_PW,
 118         [LCK_PR] LCK_COMPAT_PR,
 119         [LCK_CW] LCK_COMPAT_CW,
 120         [LCK_CR] LCK_COMPAT_CR,
 121         [LCK_NL] LCK_COMPAT_NL,
 122         [LCK_GROUP] LCK_COMPAT_GROUP
 123 };
 124
 125 static inline void lockmode_verify(ldlm_mode_t mode)
 126 {
 127        LASSERT(mode >= LCK_EX && mode <= LCK_GROUP);
 128 }
 129
 130 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 131 {
 132        return (lck_compat_array[exist] & new);
 133 }
 134
 135 /*
 136  *
 137  * cluster name spaces
 138  *
 139  */
 140
 141 #define DLM_OST_NAMESPACE 1
 142 #define DLM_MDS_NAMESPACE 2
 143
 144 /* XXX
 145    - do we just separate this by security domains and use a prefix for
 146      multiple namespaces in the same domain?
 147    -
 148 */
 149
 150 struct ldlm_lock;
 151 struct ldlm_resource;
 152 struct ldlm_namespace;
 153
 154 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 155                                void *req_cookie, ldlm_mode_t mode, int flags,
 156                                void *data);
 157
 158 struct ldlm_valblock_ops {
 159         int (*lvbo_init)(struct ldlm_resource *res);
 160         int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m,
 161                            int buf_idx, int increase);
 162 };
 163
 164 struct ldlm_namespace {
 165         char                  *ns_name;
 166         __u32                  ns_client; /* is this a client-side lock tree? */
 167         struct list_head      *ns_hash; /* hash table for ns */
 168         __u32                  ns_refcount; /* count of resources in the hash */
 169         struct list_head       ns_root_list; /* all root resources in ns */
 170         struct lustre_lock     ns_lock; /* protects hash, refcount, list */
 171         struct list_head       ns_list_chain; /* position in global NS list */
 172         /*
 173         struct proc_dir_entry *ns_proc_dir;
 174         */
 175
 176         struct list_head       ns_unused_list; /* all root resources in ns */
 177         int                    ns_nr_unused;
 178         unsigned int           ns_max_unused;
 179
 180         spinlock_t             ns_counter_lock;
 181         __u64                  ns_locks;
 182         __u64                  ns_resources;
 183         ldlm_res_policy        ns_policy;
 184         struct ldlm_valblock_ops *ns_lvbo;
 185         void                    *ns_lvbp;
 186 };
 187
 188 /*
 189  *
 190  * Resource hash table
 191  *
 192  */
 193
 194 #define RES_HASH_BITS 10
 195 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 196 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 197
 198 struct ldlm_lock;
 199
 200 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 201                                       struct ldlm_lock_desc *new, void *data,
 202                                       int flag);
 203 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 204                                         void *data);
 205 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 206
 207 struct ldlm_lock {
 208         struct portals_handle l_handle; // must be first in the structure
 209         atomic_t              l_refc;
 210         struct ldlm_resource *l_resource;
 211         struct ldlm_lock     *l_parent;
 212         struct list_head      l_children;
 213         struct list_head      l_childof;
 214         struct list_head      l_lru;
 215         struct list_head      l_res_link; // position in one of three res lists
 216         struct list_head      l_export_chain; // per-export chain of locks
 217
 218         ldlm_mode_t           l_req_mode;
 219         ldlm_mode_t           l_granted_mode;
 220
 221         ldlm_completion_callback l_completion_ast;
 222         ldlm_blocking_callback   l_blocking_ast;
 223         ldlm_glimpse_callback    l_glimpse_ast;
 224
 225         struct obd_export    *l_export;
 226         struct obd_export    *l_conn_export;
 227         __u32                 l_flags;
 228         struct lustre_handle  l_remote_handle;
 229         ldlm_policy_data_t    l_policy_data;
 230
 231         __u32                 l_readers;
 232         __u32                 l_writers;
 233         __u8                  l_destroyed;
 234
 235         /* If the lock is granted, a process sleeps on this waitq to learn when
 236          * it's no longer in use.  If the lock is not granted, a process sleeps
 237          * on this waitq to learn when it becomes granted. */
 238         wait_queue_head_t     l_waitq;
 239         struct timeval        l_enqueued_time;
 240
 241         unsigned long         l_last_used;      /* jiffies */
 242         struct ldlm_extent    l_req_extent;
 243
 244         /* Client-side-only members */
 245         __u32                 l_lvb_len;        /* temporary storage for */
 246         void                 *l_lvb_data;       /* an LVB received during */
 247         void                 *l_lvb_swabber;    /* an enqueue */
 248         void                 *l_ast_data;
 249
 250         /* Server-side-only members */
 251         struct list_head      l_pending_chain;  /* callbacks pending */
 252         unsigned long         l_callback_timeout;
 253 };
 254
 255 #define LDLM_PLAIN       10
 256 #define LDLM_EXTENT      11
 257 #define LDLM_FLOCK       12
 258 #define LDLM_IBITS       13
 259
 260 #define LDLM_MIN_TYPE 10
 261 #define LDLM_MAX_TYPE 13
 262
 263 struct ldlm_resource {
 264         struct ldlm_namespace *lr_namespace;
 265         struct list_head       lr_hash;
 266         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 267         struct list_head       lr_children; /* list head for child resources */
 268         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 269                                              * part of lr_children if child */
 270
 271         struct list_head       lr_granted;
 272         struct list_head       lr_converting;
 273         struct list_head       lr_waiting;
 274         ldlm_mode_t            lr_most_restr;
 275         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 276         struct ldlm_resource  *lr_root;
 277         struct ldlm_res_id     lr_name;
 278         atomic_t               lr_refcount;
 279
 280         /* Server-side-only lock value block elements */
 281         struct semaphore       lr_lvb_sem;
 282         __u32                  lr_lvb_len;
 283         void                  *lr_lvb_data;
 284
 285         /* lr_tmp holds a list head temporarily, during the building of a work
 286          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 287         void                  *lr_tmp;
 288 };
 289
 290 struct ldlm_ast_work {
 291         struct ldlm_lock *w_lock;
 292         int               w_blocking;
 293         struct ldlm_lock_desc w_desc;
 294         struct list_head   w_list;
 295         int w_flags;
 296         void *w_data;
 297         int w_datalen;
 298 };
 299
 300 extern struct obd_ops ldlm_obd_ops;
 301
 302 extern char *ldlm_lockname[];
 303 extern char *ldlm_typename[];
 304 extern char *ldlm_it2str(int it);
 305
 306 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 307 do {                                                                          \
 308         if (lock->l_resource == NULL) {                                       \
 309                 CDEBUG(level, "### " format                                   \
 310                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 311                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 312                        LPX64" expref: %d\n" , ## a, lock,                     \
 313                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 314                        lock->l_readers, lock->l_writers,                      \
 315                        ldlm_lockname[lock->l_granted_mode],                   \
 316                        ldlm_lockname[lock->l_req_mode],                       \
 317                        lock->l_flags, lock->l_remote_handle.cookie,           \
 318                        lock->l_export ?                                       \
 319                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 320                 break;                                                        \
 321         }                                                                     \
 322         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 323                 CDEBUG(level, "### " format                                   \
 324                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 325                        "res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64\
 326                        "] (req "LPU64"->"LPU64") flags: %x remote: "LPX64     \
 327                        " expref: %d\n" , ## a,                                \
 328                        lock->l_resource->lr_namespace->ns_name, lock,         \
 329                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 330                        lock->l_readers, lock->l_writers,                      \
 331                        ldlm_lockname[lock->l_granted_mode],                   \
 332                        ldlm_lockname[lock->l_req_mode],                       \
 333                        lock->l_resource->lr_name.name[0],                     \
 334                        lock->l_resource->lr_name.name[1],                     \
 335                        atomic_read(&lock->l_resource->lr_refcount),           \
 336                        ldlm_typename[lock->l_resource->lr_type],              \
 337                        lock->l_policy_data.l_extent.start,                    \
 338                        lock->l_policy_data.l_extent.end,                      \
 339                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 340                        lock->l_flags, lock->l_remote_handle.cookie,           \
 341                        lock->l_export ?                                       \
 342                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 343                 break;                                                        \
 344         }                                                                     \
 345         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 346                 CDEBUG(level, "### " format                                   \
 347                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 348                        "res: "LPU64"/"LPU64" rrc: %d type: %s pid: "LPU64" "  \
 349                        "["LPU64"->"LPU64"] flags: %x remote: "LPX64           \
 350                        " expref: %d\n" , ## a,                                \
 351                        lock->l_resource->lr_namespace->ns_name, lock,         \
 352                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 353                        lock->l_readers, lock->l_writers,                      \
 354                        ldlm_lockname[lock->l_granted_mode],                   \
 355                        ldlm_lockname[lock->l_req_mode],                       \
 356                        lock->l_resource->lr_name.name[0],                     \
 357                        lock->l_resource->lr_name.name[1],                     \
 358                        atomic_read(&lock->l_resource->lr_refcount),           \
 359                        ldlm_typename[lock->l_resource->lr_type],              \
 360                        lock->l_policy_data.l_flock.pid,                       \
 361                        lock->l_policy_data.l_flock.start,                     \
 362                        lock->l_policy_data.l_flock.end,                       \
 363                        lock->l_flags, lock->l_remote_handle.cookie,           \
 364                        lock->l_export ?                                       \
 365                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 366                 break;                                                        \
 367         }                                                                     \
 368         if (lock->l_resource->lr_type == LDLM_IBITS) {                        \
 369                 CDEBUG(level, "### " format                                   \
 370                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 371                        "res: "LPU64"/"LPU64" bits "LPX64" rrc: %d type: %s "   \
 372                        "flags: %x remote: "LPX64" expref: %d\n" , ## a,       \
 373                        lock->l_resource->lr_namespace->ns_name,               \
 374                        lock, lock->l_handle.h_cookie,                         \
 375                        atomic_read (&lock->l_refc),                           \
 376                        lock->l_readers, lock->l_writers,                      \
 377                        ldlm_lockname[lock->l_granted_mode],                   \
 378                        ldlm_lockname[lock->l_req_mode],                       \
 379                        lock->l_resource->lr_name.name[0],                     \
 380                        lock->l_resource->lr_name.name[1],                     \
 381                        lock->l_policy_data.l_inodebits.bits,                  \
 382                        atomic_read(&lock->l_resource->lr_refcount),           \
 383                        ldlm_typename[lock->l_resource->lr_type],              \
 384                        lock->l_flags, lock->l_remote_handle.cookie,           \
 385                        lock->l_export ?                                       \
 386                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 387                 break;                                                        \
 388         }                                                                     \
 389         {                                                                     \
 390                 CDEBUG(level, "### " format                                   \
 391                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 392                        "res: "LPU64"/"LPU64"/"LPU64"/"LPU64" rrc: %d type: %s "\
 393                        "flags: %x remote: "LPX64" expref: %d\n" , ## a,       \
 394                        lock->l_resource->lr_namespace->ns_name,               \
 395                        lock, lock->l_handle.h_cookie,                         \
 396                        atomic_read (&lock->l_refc),                           \
 397                        lock->l_readers, lock->l_writers,                      \
 398                        ldlm_lockname[lock->l_granted_mode],                   \
 399                        ldlm_lockname[lock->l_req_mode],                       \
 400                        lock->l_resource->lr_name.name[0],                     \
 401                        lock->l_resource->lr_name.name[1],                     \
 402                        lock->l_resource->lr_name.name[2],                     \
 403                        lock->l_resource->lr_name.name[3],                     \
 404                        atomic_read(&lock->l_resource->lr_refcount),           \
 405                        ldlm_typename[lock->l_resource->lr_type],              \
 406                        lock->l_flags, lock->l_remote_handle.cookie,           \
 407                        lock->l_export ?                                       \
 408                        atomic_read(&lock->l_export->exp_refcount) : -99);     \
 409         }                                                                     \
 410 } while (0)
 411
 412 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 413                                                     format, ## a)
 414 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 415
 416 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 417         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 418
 419 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 420                                       int first_enq, ldlm_error_t *err);
 421
 422 /*
 423  * Iterators.
 424  */
 425
 426 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 427 #define LDLM_ITER_STOP     2 /* stop iterating */
 428
 429 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 430 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 431
 432 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 433                           void *closure);
 434 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 435                            void *closure);
 436 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 437                                ldlm_res_iterator_t iter, void *closure);
 438
 439 int ldlm_replay_locks(struct obd_import *imp);
 440 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 441                         ldlm_iterator_t iter, void *data);
 442
 443 /* ldlm_flock.c */
 444 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 445
 446 /* ldlm_extent.c */
 447 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 448
 449
 450 /* ldlm_lockd.c */
 451 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 452                              void *data, int flag);
 453 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 454 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 455 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 456                         ldlm_blocking_callback, ldlm_glimpse_callback);
 457 int ldlm_handle_convert(struct ptlrpc_request *req);
 458 int ldlm_handle_cancel(struct ptlrpc_request *req);
 459 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 460 int ldlm_get_ref(void);
 461 void ldlm_put_ref(int force);
 462
 463 /* ldlm_lock.c */
 464 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
 465 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
 466 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
 467 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
 468 void ldlm_cancel_callback(struct ldlm_lock *);
 469 int ldlm_lock_set_data(struct lustre_handle *, void *data);
 470 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
 471 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
 472                                       struct lustre_handle *);
 473
 474 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
 475 {
 476         return __ldlm_handle2lock(h, 0);
 477 }
 478
 479 #define LDLM_LOCK_PUT(lock)                     \
 480 do {                                            \
 481         /*LDLM_DEBUG((lock), "put");*/          \
 482         ldlm_lock_put(lock);                    \
 483 } while (0)
 484
 485 #define LDLM_LOCK_GET(lock)                     \
 486 ({                                              \
 487         ldlm_lock_get(lock);                    \
 488         /*LDLM_DEBUG((lock), "get");*/          \
 489         lock;                                   \
 490 })
 491
 492 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 493 void ldlm_lock_put(struct ldlm_lock *lock);
 494 void ldlm_lock_destroy(struct ldlm_lock *lock);
 495 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
 496 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
 497 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
 498 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
 499 void ldlm_lock_allow_match(struct ldlm_lock *lock);
 500 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
 501                     __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
 502                     struct lustre_handle *);
 503 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
 504                                         int *flags);
 505 void ldlm_lock_cancel(struct ldlm_lock *lock);
 506 void ldlm_cancel_locks_for_export(struct obd_export *export);
 507 void ldlm_reprocess_all(struct ldlm_resource *res);
 508 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
 509 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
 510 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
 511
 512 /* ldlm_test.c */
 513 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
 514 int ldlm_regression_start(struct obd_device *obddev,
 515                           struct lustre_handle *connh,
 516                           unsigned int threads, unsigned int max_locks_in,
 517                           unsigned int num_resources_in,
 518                           unsigned int num_extents_in);
 519 int ldlm_regression_stop(void);
 520
 521
 522 /* resource.c */
 523 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
 524 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
 525 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
 526 int ldlm_proc_setup(void);
 527 void ldlm_proc_cleanup(void);
 528
 529 /* resource.c - internal */
 530 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
 531                                         struct ldlm_resource *parent,
 532                                         struct ldlm_res_id, __u32 type,
 533                                         int create);
 534 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
 535 int ldlm_resource_putref(struct ldlm_resource *res);
 536 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
 537                             struct ldlm_lock *lock);
 538 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
 539 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
 540 void ldlm_dump_all_namespaces(void);
 541 void ldlm_namespace_dump(struct ldlm_namespace *);
 542 void ldlm_resource_dump(struct ldlm_resource *);
 543 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
 544                               struct ldlm_res_id);
 545
 546 /* ldlm_request.c */
 547 int ldlm_expired_completion_wait(void *data);
 548 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 549 int ldlm_cli_enqueue(struct obd_export *exp,
 550                      struct ptlrpc_request *req,
 551                      struct ldlm_namespace *ns,
 552                      struct ldlm_res_id,
 553                      __u32 type,
 554                      ldlm_policy_data_t *,
 555                      ldlm_mode_t mode,
 556                      int *flags,
 557                      ldlm_blocking_callback blocking,
 558                      ldlm_completion_callback completion,
 559                      ldlm_glimpse_callback glimpse,
 560                      void *data,
 561                      void *lvb,
 562                      __u32 lvb_len,
 563                      void *lvb_swabber,
 564                      struct lustre_handle *lockh);
 565 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
 566                     void *data, __u32 data_len);
 567 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
 568 int ldlm_cli_cancel(struct lustre_handle *lockh);
 569 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
 570                            int flags, void *opaque);
 571
 572 /* mds/handler.c */
 573 /* This has to be here because recursive inclusion sucks. */
 574 int intent_disposition(struct ldlm_reply *rep, int flag);
 575 void intent_set_disposition(struct ldlm_reply *rep, int flag);
 576 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 577                      void *data, int flag);
 578
 579
 580 /* ioctls for trying requests */
 581 #define IOC_LDLM_TYPE                   'f'
 582 #define IOC_LDLM_MIN_NR                 40
 583
 584 #define IOC_LDLM_TEST                   _IOWR('f', 40, long)
 585 #define IOC_LDLM_DUMP                   _IOWR('f', 41, long)
 586 #define IOC_LDLM_REGRESS_START          _IOWR('f', 42, long)
 587 #define IOC_LDLM_REGRESS_STOP           _IOWR('f', 43, long)
 588 #define IOC_LDLM_MAX_NR                 43
 589
 590 #endif