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 #define LDLM_FL_CONFIG_CHANGE  0x020000 /* see ldlm_cli_cancel_unused */
  71
  72 #define LDLM_FL_NO_TIMEOUT     0x020000 /* Blocked by group lock - wait
  73                                          * indefinitely */
  74
  75 /* file & record locking */
  76 #define LDLM_FL_BLOCK_NOWAIT   0x040000 /* server told not to wait if blocked */
  77 #define LDLM_FL_TEST_LOCK      0x080000 /* return blocking lock */
  78
  79 /* These are flags that are mapped into the flags and ASTs of blocking locks */
  80 #define LDLM_AST_DISCARD_DATA  0x80000000 /* Add FL_DISCARD to blocking ASTs */
  81 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
  82 #define LDLM_AST_FLAGS         (LDLM_FL_DISCARD_DATA)
  83
  84 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
  85  * the LVB filling happens _after_ the lock has been granted, so another thread
  86  * can match before the LVB has been updated.  As a dirty hack, we set
  87  * LDLM_FL_CAN_MATCH only after we've done the LVB poop.
  88  *
  89  * The proper fix is to do the granting inside of the completion AST, which can
  90  * be replaced with a LVB-aware wrapping function for OSC locks.  That change is
  91  * pretty high-risk, though, and would need a lot more testing. */
  92 #define LDLM_FL_CAN_MATCH      0x100000
  93
  94 /* A lock contributes to the kms calculation until it has finished the part
  95  * of it's cancelation that performs write back on its dirty pages.  It
  96  * can remain on the granted list during this whole time.  Threads racing
  97  * to update the kms after performing their writeback need to know to
  98  * exclude each others locks from the calculation as they walk the granted
  99  * list. */
 100 #define LDLM_FL_KMS_IGNORE     0x200000
 101
 102 /* The blocking callback is overloaded to perform two functions.  These flags
 103  * indicate which operation should be performed. */
 104 #define LDLM_CB_BLOCKING    1
 105 #define LDLM_CB_CANCELING   2
 106
 107 /* compatibility matrix */
 108 #define LCK_COMPAT_EX  LCK_NL
 109 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
 110 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
 111 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
 112 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 113 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 114 #define LCK_COMPAT_GROUP  (LCK_GROUP | LCK_NL)
 115
 116 static ldlm_mode_t lck_compat_array[] = {
 117         [LCK_EX] LCK_COMPAT_EX,
 118         [LCK_PW] LCK_COMPAT_PW,
 119         [LCK_PR] LCK_COMPAT_PR,
 120         [LCK_CW] LCK_COMPAT_CW,
 121         [LCK_CR] LCK_COMPAT_CR,
 122         [LCK_NL] LCK_COMPAT_NL,
 123         [LCK_GROUP] LCK_COMPAT_GROUP
 124 };
 125
 126 static inline void lockmode_verify(ldlm_mode_t mode)
 127 {
 128        LASSERT(mode >= LCK_EX && mode <= LCK_GROUP);
 129 }
 130
 131 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 132 {
 133        return (lck_compat_array[exist] & new);
 134 }
 135
 136 /*
 137  *
 138  * cluster name spaces
 139  *
 140  */
 141
 142 #define DLM_OST_NAMESPACE 1
 143 #define DLM_MDS_NAMESPACE 2
 144
 145 /* XXX
 146    - do we just separate this by security domains and use a prefix for
 147      multiple namespaces in the same domain?
 148    -
 149 */
 150
 151 struct ldlm_lock;
 152 struct ldlm_resource;
 153 struct ldlm_namespace;
 154
 155 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 156                                void *req_cookie, ldlm_mode_t mode, int flags,
 157                                void *data);
 158
 159 struct ldlm_valblock_ops {
 160         int (*lvbo_init)(struct ldlm_resource *res);
 161
 162         int (*lvbo_update)(struct ldlm_resource *res,
 163                            struct lustre_msg *m,
 164                            int buf_idx, int increase);
 165 };
 166
 167 struct ldlm_namespace {
 168         char                  *ns_name;
 169         __u32                  ns_client; /* is this a client-side lock tree? */
 170         struct list_head      *ns_hash; /* hash table for ns */
 171         __u32                  ns_refcount; /* count of resources in the hash */
 172         struct list_head       ns_root_list; /* all root resources in ns */
 173         struct lustre_lock     ns_lock; /* protects hash, refcount, list */
 174         struct list_head       ns_list_chain; /* position in global NS list */
 175         /*
 176         struct proc_dir_entry *ns_proc_dir;
 177         */
 178
 179         struct list_head       ns_unused_list; /* all root resources in ns */
 180         int                    ns_nr_unused;
 181         unsigned int           ns_max_unused;
 182         unsigned long          ns_next_dump;   /* next dump time */
 183
 184         spinlock_t             ns_counter_lock;
 185         __u64                  ns_locks;
 186         __u64                  ns_resources;
 187         ldlm_res_policy        ns_policy;
 188         struct ldlm_valblock_ops *ns_lvbo;
 189         void                  *ns_lvbp;
 190         wait_queue_head_t      ns_waitq;
 191 };
 192
 193 /*
 194  *
 195  * Resource hash table
 196  *
 197  */
 198
 199 #define RES_HASH_BITS 10
 200 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 201 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 202
 203 struct ldlm_lock;
 204
 205 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 206                                       struct ldlm_lock_desc *new, void *data,
 207                                       int flag);
 208 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 209                                         void *data);
 210 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 211
 212 struct ldlm_lock {
 213         struct portals_handle l_handle; // must be first in the structure
 214         atomic_t              l_refc;
 215         struct ldlm_resource *l_resource;
 216         struct ldlm_lock     *l_parent;
 217         struct list_head      l_children;
 218         struct list_head      l_childof;
 219         struct list_head      l_lru;
 220         struct list_head      l_res_link; // position in one of three res lists
 221         struct list_head      l_export_chain; // per-export chain of locks
 222
 223         ldlm_mode_t           l_req_mode;
 224         ldlm_mode_t           l_granted_mode;
 225
 226         ldlm_completion_callback l_completion_ast;
 227         ldlm_blocking_callback   l_blocking_ast;
 228         ldlm_glimpse_callback    l_glimpse_ast;
 229
 230         struct obd_export    *l_export;
 231         struct obd_export    *l_conn_export;
 232         __u32                 l_flags;
 233         struct lustre_handle  l_remote_handle;
 234         ldlm_policy_data_t    l_policy_data;
 235
 236         __u32                 l_readers;
 237         __u32                 l_writers;
 238         __u8                  l_destroyed;
 239
 240         /* If the lock is granted, a process sleeps on this waitq to learn when
 241          * it's no longer in use.  If the lock is not granted, a process sleeps
 242          * on this waitq to learn when it becomes granted. */
 243         wait_queue_head_t     l_waitq;
 244         struct timeval        l_enqueued_time;
 245
 246         unsigned long         l_last_used;      /* jiffies */
 247         struct ldlm_extent    l_req_extent;
 248
 249         /* Client-side-only members */
 250         __u32                 l_lvb_len;        /* temporary storage for */
 251         void                 *l_lvb_data;       /* an LVB received during */
 252         void                 *l_lvb_swabber;    /* an enqueue */
 253         void                 *l_ast_data;
 254
 255         /* Server-side-only members */
 256         struct list_head      l_pending_chain;  /* callbacks pending */
 257         unsigned long         l_callback_timeout;
 258
 259         __u32                 l_pid;            /* pid which created this lock */
 260
 261         struct list_head      l_tmp;
 262 };
 263
 264 #define LDLM_PLAIN       10
 265 #define LDLM_EXTENT      11
 266 #define LDLM_FLOCK       12
 267 #define LDLM_IBITS       13
 268
 269 #define LDLM_MIN_TYPE 10
 270 #define LDLM_MAX_TYPE 14
 271
 272 struct ldlm_resource {
 273         struct ldlm_namespace *lr_namespace;
 274         struct list_head       lr_hash;
 275         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 276         struct list_head       lr_children; /* list head for child resources */
 277         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 278                                              * part of lr_children if child */
 279
 280         struct list_head       lr_granted;
 281         struct list_head       lr_converting;
 282         struct list_head       lr_waiting;
 283         ldlm_mode_t            lr_most_restr;
 284         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 285         struct ldlm_resource  *lr_root;
 286         struct ldlm_res_id     lr_name;
 287         atomic_t               lr_refcount;
 288
 289         /* Server-side-only lock value block elements */
 290         struct semaphore       lr_lvb_sem;
 291         __u32                  lr_lvb_len;
 292         void                  *lr_lvb_data;
 293
 294         /* lr_tmp holds a list head temporarily, during the building of a work
 295          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 296         void                  *lr_tmp;
 297 };
 298
 299 struct ldlm_ast_work {
 300         struct ldlm_lock *w_lock;
 301         int               w_blocking;
 302         struct ldlm_lock_desc w_desc;
 303         struct list_head   w_list;
 304         int w_flags;
 305         void *w_data;
 306         int w_datalen;
 307 };
 308
 309 extern struct obd_ops ldlm_obd_ops;
 310
 311 extern char *ldlm_lockname[];
 312 extern char *ldlm_typename[];
 313 extern char *ldlm_it2str(int it);
 314
 315 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 316 do {                                                                          \
 317         if (lock->l_resource == NULL) {                                       \
 318                 CDEBUG(level, "### " format                                   \
 319                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 320                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 321                        LPX64" expref: %d pid: %u\n" , ## a, lock,             \
 322                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 323                        lock->l_readers, lock->l_writers,                      \
 324                        ldlm_lockname[lock->l_granted_mode],                   \
 325                        ldlm_lockname[lock->l_req_mode],                       \
 326                        lock->l_flags, lock->l_remote_handle.cookie,           \
 327                        lock->l_export ?                                       \
 328                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 329                        lock->l_pid);                                          \
 330                 break;                                                        \
 331         }                                                                     \
 332         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 333                 CDEBUG(level, "### " format                                   \
 334                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 335                        "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s ["LPU64 \
 336                        "->"LPU64"] (req "LPU64"->"LPU64") flags: %x remote: " \
 337                        LPX64" expref: %d pid: %u\n" , ## a,                   \
 338                        lock->l_resource->lr_namespace->ns_name, lock,         \
 339                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 340                        lock->l_readers, lock->l_writers,                      \
 341                        ldlm_lockname[lock->l_granted_mode],                   \
 342                        ldlm_lockname[lock->l_req_mode],                       \
 343                        lock->l_resource->lr_name.name[0],                     \
 344                        lock->l_resource->lr_name.name[1],                     \
 345                        lock->l_resource->lr_name.name[2],                     \
 346                        atomic_read(&lock->l_resource->lr_refcount),           \
 347                        ldlm_typename[lock->l_resource->lr_type],              \
 348                        lock->l_policy_data.l_extent.start,                    \
 349                        lock->l_policy_data.l_extent.end,                      \
 350                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 351                        lock->l_flags, lock->l_remote_handle.cookie,           \
 352                        lock->l_export ?                                       \
 353                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 354                        lock->l_pid);                                          \
 355                 break;                                                        \
 356         }                                                                     \
 357         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 358                 CDEBUG(level, "### " format                                   \
 359                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 360                        "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s pid: "  \
 361                        LPU64" " "["LPU64"->"LPU64"] flags: %x remote: "LPX64  \
 362                        " expref: %d pid: %u\n" , ## a,                        \
 363                        lock->l_resource->lr_namespace->ns_name, lock,         \
 364                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 365                        lock->l_readers, lock->l_writers,                      \
 366                        ldlm_lockname[lock->l_granted_mode],                   \
 367                        ldlm_lockname[lock->l_req_mode],                       \
 368                        lock->l_resource->lr_name.name[0],                     \
 369                        lock->l_resource->lr_name.name[1],                     \
 370                        lock->l_resource->lr_name.name[2],                     \
 371                        atomic_read(&lock->l_resource->lr_refcount),           \
 372                        ldlm_typename[lock->l_resource->lr_type],              \
 373                        lock->l_policy_data.l_flock.pid,                       \
 374                        lock->l_policy_data.l_flock.start,                     \
 375                        lock->l_policy_data.l_flock.end,                       \
 376                        lock->l_flags, lock->l_remote_handle.cookie,           \
 377                        lock->l_export ?                                       \
 378                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 379                        lock->l_pid);                                          \
 380                 break;                                                        \
 381         }                                                                     \
 382         if (lock->l_resource->lr_type == LDLM_IBITS) {                        \
 383                 CDEBUG(level, "### " format                                   \
 384                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 385                        "res: "LPU64"/"LPU64"/"LPU64" bits "LPX64" rrc: %d "   \
 386                        "type: %s flags: %x remote: "LPX64" expref: %d "       \
 387                        "pid %u\n" , ## a,                                     \
 388                        lock->l_resource->lr_namespace->ns_name,               \
 389                        lock, lock->l_handle.h_cookie,                         \
 390                        atomic_read (&lock->l_refc),                           \
 391                        lock->l_readers, lock->l_writers,                      \
 392                        ldlm_lockname[lock->l_granted_mode],                   \
 393                        ldlm_lockname[lock->l_req_mode],                       \
 394                        lock->l_resource->lr_name.name[0],                     \
 395                        lock->l_resource->lr_name.name[1],                     \
 396                        lock->l_resource->lr_name.name[2],                     \
 397                        lock->l_policy_data.l_inodebits.bits,                  \
 398                        atomic_read(&lock->l_resource->lr_refcount),           \
 399                        ldlm_typename[lock->l_resource->lr_type],              \
 400                        lock->l_flags, lock->l_remote_handle.cookie,           \
 401                        lock->l_export ?                                       \
 402                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 403                        lock->l_pid);                                          \
 404                 break;                                                        \
 405         }                                                                     \
 406         {                                                                     \
 407                 CDEBUG(level, "### " format                                   \
 408                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 409                        "res: "LPU64"/"LPU64"/"LPU64"/"LPU64" rrc: %d type: %s " \
 410                        "flags: %x remote: "LPX64" expref: %d "                \
 411                        "pid: %u\n" , ## a,                                    \
 412                        lock->l_resource->lr_namespace->ns_name,               \
 413                        lock, lock->l_handle.h_cookie,                         \
 414                        atomic_read (&lock->l_refc),                           \
 415                        lock->l_readers, lock->l_writers,                      \
 416                        ldlm_lockname[lock->l_granted_mode],                   \
 417                        ldlm_lockname[lock->l_req_mode],                       \
 418                        lock->l_resource->lr_name.name[0],                     \
 419                        lock->l_resource->lr_name.name[1],                     \
 420                        lock->l_resource->lr_name.name[2],                     \
 421                        lock->l_resource->lr_name.name[3],                     \
 422                        atomic_read(&lock->l_resource->lr_refcount),           \
 423                        ldlm_typename[lock->l_resource->lr_type],              \
 424                        lock->l_flags, lock->l_remote_handle.cookie,           \
 425                        lock->l_export ?                                       \
 426                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 427                        lock->l_pid);                                          \
 428         }                                                                     \
 429 } while (0)
 430
 431 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 432                                                     format, ## a)
 433 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 434
 435 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 436         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 437
 438 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 439                                       int first_enq, ldlm_error_t *err);
 440
 441 /*
 442  * Iterators.
 443  */
 444
 445 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 446 #define LDLM_ITER_STOP     2 /* stop iterating */
 447
 448 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 449 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 450
 451 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 452                           void *closure);
 453 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 454                            void *closure);
 455 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 456                                ldlm_res_iterator_t iter, void *closure);
 457
 458 int ldlm_replay_locks(struct obd_import *imp);
 459 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 460                         ldlm_iterator_t iter, void *data);
 461
 462 /* ldlm_flock.c */
 463 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 464
 465 /* ldlm_extent.c */
 466 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 467
 468
 469 /* ldlm_lockd.c */
 470 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 471                              void *data, int flag);
 472 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 473 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 474 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 475                         ldlm_blocking_callback, ldlm_glimpse_callback);
 476 int ldlm_handle_convert(struct ptlrpc_request *req);
 477 int ldlm_handle_cancel(struct ptlrpc_request *req);
 478 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 479 int ldlm_get_ref(void);
 480 void ldlm_put_ref(int force);
 481
 482 /* ldlm_lock.c */
 483 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
 484 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
 485 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
 486 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
 487 void ldlm_cancel_callback(struct ldlm_lock *);
 488 int ldlm_lock_set_data(struct lustre_handle *, void *data);
 489 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
 490 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
 491                                       struct lustre_handle *);
 492
 493 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
 494 {
 495         return __ldlm_handle2lock(h, 0);
 496 }
 497
 498 #define LDLM_LOCK_PUT(lock)                     \
 499 do {                                            \
 500         /*LDLM_DEBUG((lock), "put");*/          \
 501         ldlm_lock_put(lock);                    \
 502 } while (0)
 503
 504 #define LDLM_LOCK_GET(lock)                     \
 505 ({                                              \
 506         ldlm_lock_get(lock);                    \
 507         /*LDLM_DEBUG((lock), "get");*/          \
 508         lock;                                   \
 509 })
 510
 511 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 512 void ldlm_lock_put(struct ldlm_lock *lock);
 513 void ldlm_lock_destroy(struct ldlm_lock *lock);
 514 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
 515 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
 516 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
 517 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
 518 void ldlm_lock_allow_match(struct ldlm_lock *lock);
 519 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
 520                     __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
 521                     struct lustre_handle *);
 522 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
 523                                         int *flags);
 524 void ldlm_lock_cancel(struct ldlm_lock *lock);
 525 void ldlm_cancel_locks_for_export(struct obd_export *export);
 526 void ldlm_reprocess_all(struct ldlm_resource *res);
 527 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
 528 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
 529 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
 530
 531 /* ldlm_test.c */
 532 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
 533 int ldlm_regression_start(struct obd_device *obddev,
 534                           struct lustre_handle *connh,
 535                           unsigned int threads, unsigned int max_locks_in,
 536                           unsigned int num_resources_in,
 537                           unsigned int num_extents_in);
 538 int ldlm_regression_stop(void);
 539
 540
 541 /* resource.c */
 542 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
 543 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
 544 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
 545 int ldlm_proc_setup(void);
 546 void ldlm_proc_cleanup(void);
 547
 548 /* resource.c - internal */
 549 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
 550                                         struct ldlm_resource *parent,
 551                                         struct ldlm_res_id, __u32 type,
 552                                         int create);
 553 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
 554 int ldlm_resource_putref(struct ldlm_resource *res);
 555 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
 556                             struct ldlm_lock *lock);
 557 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
 558 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
 559 void ldlm_dump_all_namespaces(int level);
 560 void ldlm_namespace_dump(int level, struct ldlm_namespace *);
 561 void ldlm_resource_dump(int level, struct ldlm_resource *);
 562 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
 563                               struct ldlm_res_id);
 564
 565 /* ldlm_request.c */
 566 int ldlm_expired_completion_wait(void *data);
 567 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 568 int ldlm_cli_enqueue(struct obd_export *exp,
 569                      struct ptlrpc_request *req,
 570                      struct ldlm_namespace *ns,
 571                      struct ldlm_res_id,
 572                      __u32 type,
 573                      ldlm_policy_data_t *,
 574                      ldlm_mode_t mode,
 575                      int *flags,
 576                      ldlm_blocking_callback blocking,
 577                      ldlm_completion_callback completion,
 578                      ldlm_glimpse_callback glimpse,
 579                      void *data,
 580                      void *lvb,
 581                      __u32 lvb_len,
 582                      void *lvb_swabber,
 583                      struct lustre_handle *lockh);
 584 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
 585                     void *data, __u32 data_len);
 586 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
 587 int ldlm_cli_cancel(struct lustre_handle *lockh);
 588 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
 589                            int flags, void *opaque);
 590
 591 /* mds/handler.c */
 592 /* This has to be here because recursive inclusion sucks. */
 593 int intent_disposition(struct ldlm_reply *rep, int flag);
 594 void intent_set_disposition(struct ldlm_reply *rep, int flag);
 595 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 596                      void *data, int flag);
 597
 598
 599 /* ioctls for trying requests */
 600 #define IOC_LDLM_TYPE                   'f'
 601 #define IOC_LDLM_MIN_NR                 40
 602
 603 #define IOC_LDLM_TEST                   _IOWR('f', 40, long)
 604 #define IOC_LDLM_DUMP                   _IOWR('f', 41, long)
 605 #define IOC_LDLM_REGRESS_START          _IOWR('f', 42, long)
 606 #define IOC_LDLM_REGRESS_STOP           _IOWR('f', 43, long)
 607 #define IOC_LDLM_MAX_NR                 43
 608
 609 #endif