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 LDLM_DEFAULT_LRU_SIZE 100
  23
  24 typedef enum {
  25         ELDLM_OK = 0,
  26
  27         ELDLM_LOCK_CHANGED = 300,
  28         ELDLM_LOCK_ABORTED = 301,
  29         ELDLM_LOCK_REPLACED = 302,
  30         ELDLM_NO_LOCK_DATA = 303,
  31
  32         ELDLM_NAMESPACE_EXISTS = 400,
  33         ELDLM_BAD_NAMESPACE    = 401
  34 } ldlm_error_t;
  35
  36 #define LDLM_NAMESPACE_SERVER 0
  37 #define LDLM_NAMESPACE_CLIENT 1
  38
  39 #define LDLM_FL_LOCK_CHANGED   0x000001 /* extent, mode, or resource changed */
  40
  41 /* If the server returns one of these flags, then the lock was put on that list.
  42  * If the client sends one of these flags (during recovery ONLY!), it wants the
  43  * lock added to the specified list, no questions asked. -p */
  44 #define LDLM_FL_BLOCK_GRANTED  0x000002
  45 #define LDLM_FL_BLOCK_CONV     0x000004
  46 #define LDLM_FL_BLOCK_WAIT     0x000008
  47
  48 #define LDLM_FL_CBPENDING      0x000010 /* this lock is being destroyed */
  49 #define LDLM_FL_AST_SENT       0x000020 /* blocking or cancel packet was sent */
  50 #define LDLM_FL_WAIT_NOREPROC  0x000040 /* not a real flag, not saved in lock */
  51 #define LDLM_FL_CANCEL         0x000080 /* cancellation callback already run */
  52
  53 /* Lock is being replayed.  This could probably be implied by the fact that one
  54  * of BLOCK_{GRANTED,CONV,WAIT} is set, but that is pretty dangerous. */
  55 #define LDLM_FL_REPLAY         0x000100
  56
  57 #define LDLM_FL_INTENT_ONLY    0x000200 /* don't grant lock, just do intent */
  58 #define LDLM_FL_LOCAL_ONLY     0x000400 /* see ldlm_cli_cancel_unused */
  59
  60 /* don't run the cancel callback under ldlm_cli_cancel_unused */
  61 #define LDLM_FL_FAILED         0x000800
  62
  63 #define LDLM_FL_HAS_INTENT     0x001000 /* lock request has intent */
  64 #define LDLM_FL_CANCELING      0x002000 /* lock cancel has already been sent */
  65 #define LDLM_FL_LOCAL          0x004000 /* local lock (ie, no srv/cli split) */
  66 #define LDLM_FL_WARN           0x008000 /* see ldlm_cli_cancel_unused */
  67 #define LDLM_FL_DISCARD_DATA   0x010000 /* discard (no writeback) on cancel */
  68 #define LDLM_FL_CONFIG_CHANGE  0x020000 /* see ldlm_cli_cancel_unused */
  69
  70 #define LDLM_FL_NO_TIMEOUT     0x020000 /* Blocked by group lock - wait
  71                                          * indefinitely */
  72
  73 /* file & record locking */
  74 #define LDLM_FL_BLOCK_NOWAIT   0x040000 /* server told not to wait if blocked */
  75 #define LDLM_FL_TEST_LOCK      0x080000 /* return blocking lock */
  76
  77 /* These are flags that are mapped into the flags and ASTs of blocking locks */
  78 #define LDLM_AST_DISCARD_DATA  0x80000000 /* Add FL_DISCARD to blocking ASTs */
  79 /* Flags sent in AST lock_flags to be mapped into the receiving lock. */
  80 #define LDLM_AST_FLAGS         (LDLM_FL_DISCARD_DATA)
  81
  82 /* XXX FIXME: This is being added to b_size as a low-risk fix to the fact that
  83  * the LVB filling happens _after_ the lock has been granted, so another thread
  84  * can match before the LVB has been updated.  As a dirty hack, we set
  85  * LDLM_FL_CAN_MATCH only after we've done the LVB poop.
  86  *
  87  * The proper fix is to do the granting inside of the completion AST, which can
  88  * be replaced with a LVB-aware wrapping function for OSC locks.  That change is
  89  * pretty high-risk, though, and would need a lot more testing. */
  90 #define LDLM_FL_CAN_MATCH      0x100000
  91
  92 /* A lock contributes to the kms calculation until it has finished the part
  93  * of it's cancelation that performs write back on its dirty pages.  It
  94  * can remain on the granted list during this whole time.  Threads racing
  95  * to update the kms after performing their writeback need to know to
  96  * exclude each others locks from the calculation as they walk the granted
  97  * list. */
  98 #define LDLM_FL_KMS_IGNORE     0x200000
  99
 100 /* completion ast to be executed */
 101 #define LDLM_FL_CP_REQD        0x400000
 102
 103 /* cleanup_resource has already handled the lock */
 104 #define LDLM_FL_CLEANED        0x800000
 105
 106 /* optimization hint: LDLM can run blocking callback from current context
 107  * w/o involving separate thread. in order to decrease cs rate */
 108 #define LDLM_FL_ATOMIC_CB      0x1000000
 109
 110 /* while this flag is set, the lock can't change resource */
 111 #define LDLM_FL_LOCK_PROTECT   0x4000000
 112 #define LDLM_FL_LOCK_PROTECT_BIT  26
 113
 114 /* The blocking callback is overloaded to perform two functions.  These flags
 115  * indicate which operation should be performed. */
 116 #define LDLM_CB_BLOCKING    1
 117 #define LDLM_CB_CANCELING   2
 118
 119 /* compatibility matrix */
 120 #define LCK_COMPAT_EX  LCK_NL
 121 #define LCK_COMPAT_PW  (LCK_COMPAT_EX | LCK_CR)
 122 #define LCK_COMPAT_PR  (LCK_COMPAT_PW | LCK_PR)
 123 #define LCK_COMPAT_CW  (LCK_COMPAT_PW | LCK_CW)
 124 #define LCK_COMPAT_CR  (LCK_COMPAT_CW | LCK_PR | LCK_PW)
 125 #define LCK_COMPAT_NL  (LCK_COMPAT_CR | LCK_EX)
 126 #define LCK_COMPAT_GROUP  (LCK_GROUP | LCK_NL)
 127
 128 static ldlm_mode_t lck_compat_array[] = {
 129         [LCK_EX] LCK_COMPAT_EX,
 130         [LCK_PW] LCK_COMPAT_PW,
 131         [LCK_PR] LCK_COMPAT_PR,
 132         [LCK_CW] LCK_COMPAT_CW,
 133         [LCK_CR] LCK_COMPAT_CR,
 134         [LCK_NL] LCK_COMPAT_NL,
 135         [LCK_GROUP] LCK_COMPAT_GROUP
 136 };
 137
 138 static inline void lockmode_verify(ldlm_mode_t mode)
 139 {
 140        LASSERT(mode >= LCK_EX && mode <= LCK_GROUP);
 141 }
 142
 143 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
 144 {
 145        return (lck_compat_array[exist] & new);
 146 }
 147
 148 /*
 149  *
 150  * cluster name spaces
 151  *
 152  */
 153
 154 #define DLM_OST_NAMESPACE 1
 155 #define DLM_MDS_NAMESPACE 2
 156
 157 /* XXX
 158    - do we just separate this by security domains and use a prefix for
 159      multiple namespaces in the same domain?
 160    -
 161 */
 162
 163 /*
 164  * Locking rules:
 165  *
 166  * lr_lock
 167  *
 168  * lr_lock
 169  *     waiting_locks_spinlock
 170  *
 171  * lr_lock
 172  *     led_lock
 173  *
 174  * lr_lock
 175  *     ns_unused_lock
 176  *
 177  * lr_lvb_sem
 178  *     lr_lock
 179  *
 180  */
 181
 182 struct ldlm_lock;
 183 struct ldlm_resource;
 184 struct ldlm_namespace;
 185
 186 typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **,
 187                                void *req_cookie, ldlm_mode_t mode, int flags,
 188                                void *data);
 189
 190 struct ldlm_valblock_ops {
 191         int (*lvbo_init)(struct ldlm_resource *res);
 192
 193         int (*lvbo_update)(struct ldlm_resource *res,
 194                            struct lustre_msg *m,
 195                            int buf_idx, int increase);
 196 };
 197
 198 struct ldlm_namespace {
 199         char                  *ns_name;
 200         __u32                  ns_client; /* is this a client-side lock tree? */
 201         struct list_head      *ns_hash; /* hash table for ns */
 202         spinlock_t             ns_hash_lock;
 203         __u32                  ns_refcount; /* count of resources in the hash */
 204         struct list_head       ns_root_list; /* all root resources in ns */
 205         struct list_head       ns_list_chain; /* position in global NS list */
 206         /*
 207         struct proc_dir_entry *ns_proc_dir;
 208         */
 209
 210         struct list_head       ns_unused_list; /* all root resources in ns */
 211         int                    ns_nr_unused;
 212         spinlock_t             ns_unused_lock;
 213
 214         unsigned int           ns_max_unused;
 215         unsigned long          ns_next_dump;   /* next dump time */
 216
 217         atomic_t               ns_locks;
 218         __u64                  ns_resources;
 219         ldlm_res_policy        ns_policy;
 220         struct ldlm_valblock_ops *ns_lvbo;
 221         void                  *ns_lvbp;
 222         wait_queue_head_t      ns_waitq;
 223 };
 224
 225 /*
 226  *
 227  * Resource hash table
 228  *
 229  */
 230
 231 #define RES_HASH_BITS 10
 232 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
 233 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
 234
 235 struct ldlm_lock;
 236
 237 typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock,
 238                                       struct ldlm_lock_desc *new, void *data,
 239                                       int flag);
 240 typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags,
 241                                         void *data);
 242 typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data);
 243
 244 struct ldlm_lock {
 245         struct portals_handle l_handle; // must be first in the structure
 246         atomic_t              l_refc;
 247
 248         /* ldlm_lock_change_resource() can change this */
 249         struct ldlm_resource *l_resource;
 250
 251         /* set once, no need to protect it */
 252         struct ldlm_lock     *l_parent;
 253
 254         /* protected by ns_hash_lock */
 255         struct list_head      l_children;
 256         struct list_head      l_childof;
 257
 258         /* protected by ns_hash_lock. FIXME */
 259         struct list_head      l_lru;
 260
 261         /* protected by lr_lock */
 262         struct list_head      l_res_link; // position in one of three res lists
 263
 264         /* protected by led_lock */
 265         struct list_head      l_export_chain; // per-export chain of locks
 266
 267         /* protected by lr_lock */
 268         ldlm_mode_t           l_req_mode;
 269         ldlm_mode_t           l_granted_mode;
 270
 271         ldlm_completion_callback l_completion_ast;
 272         ldlm_blocking_callback   l_blocking_ast;
 273         ldlm_glimpse_callback    l_glimpse_ast;
 274
 275         struct obd_export    *l_export;
 276         struct obd_export    *l_conn_export;
 277
 278         /* protected by lr_lock */
 279         __u32                 l_flags;
 280
 281         struct lustre_handle  l_remote_handle;
 282         ldlm_policy_data_t    l_policy_data;
 283
 284         /* protected by lr_lock */
 285         __u32                 l_readers;
 286         __u32                 l_writers;
 287         __u8                  l_destroyed;
 288
 289         /* If the lock is granted, a process sleeps on this waitq to learn when
 290          * it's no longer in use.  If the lock is not granted, a process sleeps
 291          * on this waitq to learn when it becomes granted. */
 292         wait_queue_head_t     l_waitq;
 293         struct timeval        l_enqueued_time;
 294
 295         unsigned long         l_last_used;      /* jiffies */
 296         struct ldlm_extent    l_req_extent;
 297
 298         /* Client-side-only members */
 299         __u32                 l_lvb_len;        /* temporary storage for */
 300         void                 *l_lvb_data;       /* an LVB received during */
 301         void                 *l_lvb_swabber;    /* an enqueue */
 302         void                 *l_ast_data;
 303
 304         /* Server-side-only members */
 305
 306         /* protected by elt_lock */
 307         struct list_head      l_pending_chain;  /* callbacks pending */
 308         unsigned long         l_callback_timeout;
 309
 310         __u32                 l_pid;            /* pid which created this lock */
 311         __u32                 l_pidb;           /* who holds LOCK_PROTECT_BIT */
 312
 313         struct list_head      l_tmp;
 314
 315         /* for ldlm_add_ast_work_item() */
 316         struct list_head      l_bl_ast;
 317         struct list_head      l_cp_ast;
 318         struct ldlm_lock     *l_blocking_lock;
 319         int                   l_bl_ast_run;
 320 };
 321
 322 #define LDLM_PLAIN       10
 323 #define LDLM_EXTENT      11
 324 #define LDLM_FLOCK       12
 325 #define LDLM_IBITS       13
 326
 327 #define LDLM_MIN_TYPE 10
 328 #define LDLM_MAX_TYPE 14
 329
 330 struct ldlm_resource {
 331         struct ldlm_namespace *lr_namespace;
 332
 333         /* protected by ns_hash_lock */
 334         struct list_head       lr_hash;
 335         struct ldlm_resource  *lr_parent;   /* 0 for a root resource */
 336         struct list_head       lr_children; /* list head for child resources */
 337         struct list_head       lr_childof;  /* part of ns_root_list if root res,
 338                                              * part of lr_children if child */
 339         spinlock_t             lr_lock;
 340
 341         /* protected by lr_lock */
 342         struct list_head       lr_granted;
 343         struct list_head       lr_converting;
 344         struct list_head       lr_waiting;
 345         ldlm_mode_t            lr_most_restr;
 346         __u32                  lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
 347         struct ldlm_res_id     lr_name;
 348         atomic_t               lr_refcount;
 349
 350         /* Server-side-only lock value block elements */
 351         struct semaphore       lr_lvb_sem;
 352         __u32                  lr_lvb_len;
 353         void                  *lr_lvb_data;
 354
 355         /* lr_tmp holds a list head temporarily, during the building of a work
 356          * queue.  see ldlm_add_ast_work_item and ldlm_run_ast_work */
 357         void                  *lr_tmp;
 358 };
 359
 360 struct ldlm_ast_work {
 361         struct ldlm_lock *w_lock;
 362         int               w_blocking;
 363         struct ldlm_lock_desc w_desc;
 364         struct list_head   w_list;
 365         int w_flags;
 366         void *w_data;
 367         int w_datalen;
 368 };
 369
 370 extern struct obd_ops ldlm_obd_ops;
 371
 372 extern char *ldlm_lockname[];
 373 extern char *ldlm_typename[];
 374 extern char *ldlm_it2str(int it);
 375
 376 #define __LDLM_DEBUG(level, lock, format, a...)                               \
 377 do {                                                                          \
 378         if (lock->l_resource == NULL) {                                       \
 379                 CDEBUG(level, "### " format                                   \
 380                        " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "\
 381                        "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "   \
 382                        LPX64" expref: %d pid: %u\n" , ## a, lock,             \
 383                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 384                        lock->l_readers, lock->l_writers,                      \
 385                        ldlm_lockname[lock->l_granted_mode],                   \
 386                        ldlm_lockname[lock->l_req_mode],                       \
 387                        lock->l_flags, lock->l_remote_handle.cookie,           \
 388                        lock->l_export ?                                       \
 389                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 390                        lock->l_pid);                                          \
 391                 break;                                                        \
 392         }                                                                     \
 393         if (lock->l_resource->lr_type == LDLM_EXTENT) {                       \
 394                 CDEBUG(level, "### " format                                   \
 395                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 396                        "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s ["LPU64 \
 397                        "->"LPU64"] (req "LPU64"->"LPU64") flags: %x remote: " \
 398                        LPX64" expref: %d pid: %u\n" , ## a,                   \
 399                        lock->l_resource->lr_namespace->ns_name, lock,         \
 400                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 401                        lock->l_readers, lock->l_writers,                      \
 402                        ldlm_lockname[lock->l_granted_mode],                   \
 403                        ldlm_lockname[lock->l_req_mode],                       \
 404                        lock->l_resource->lr_name.name[0],                     \
 405                        lock->l_resource->lr_name.name[1],                     \
 406                        lock->l_resource->lr_name.name[2],                     \
 407                        atomic_read(&lock->l_resource->lr_refcount),           \
 408                        ldlm_typename[lock->l_resource->lr_type],              \
 409                        lock->l_policy_data.l_extent.start,                    \
 410                        lock->l_policy_data.l_extent.end,                      \
 411                        lock->l_req_extent.start, lock->l_req_extent.end,      \
 412                        lock->l_flags, lock->l_remote_handle.cookie,           \
 413                        lock->l_export ?                                       \
 414                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 415                        lock->l_pid);                                          \
 416                 break;                                                        \
 417         }                                                                     \
 418         if (lock->l_resource->lr_type == LDLM_FLOCK) {                        \
 419                 CDEBUG(level, "### " format                                   \
 420                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 421                        "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s pid: "  \
 422                        LPU64" " "["LPU64"->"LPU64"] flags: %x remote: "LPX64  \
 423                        " expref: %d pid: %u\n" , ## a,                        \
 424                        lock->l_resource->lr_namespace->ns_name, lock,         \
 425                        lock->l_handle.h_cookie, atomic_read(&lock->l_refc),   \
 426                        lock->l_readers, lock->l_writers,                      \
 427                        ldlm_lockname[lock->l_granted_mode],                   \
 428                        ldlm_lockname[lock->l_req_mode],                       \
 429                        lock->l_resource->lr_name.name[0],                     \
 430                        lock->l_resource->lr_name.name[1],                     \
 431                        lock->l_resource->lr_name.name[2],                     \
 432                        atomic_read(&lock->l_resource->lr_refcount),           \
 433                        ldlm_typename[lock->l_resource->lr_type],              \
 434                        lock->l_policy_data.l_flock.pid,                       \
 435                        lock->l_policy_data.l_flock.start,                     \
 436                        lock->l_policy_data.l_flock.end,                       \
 437                        lock->l_flags, lock->l_remote_handle.cookie,           \
 438                        lock->l_export ?                                       \
 439                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 440                        lock->l_pid);                                          \
 441                 break;                                                        \
 442         }                                                                     \
 443         if (lock->l_resource->lr_type == LDLM_IBITS) {                        \
 444                 CDEBUG(level, "### " format                                   \
 445                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 446                        "res: "LPU64"/"LPU64"/"LPU64" bits "LPX64" rrc: %d "   \
 447                        "type: %s flags: %x remote: "LPX64" expref: %d "       \
 448                        "pid %u\n" , ## a,                                     \
 449                        lock->l_resource->lr_namespace->ns_name,               \
 450                        lock, lock->l_handle.h_cookie,                         \
 451                        atomic_read (&lock->l_refc),                           \
 452                        lock->l_readers, lock->l_writers,                      \
 453                        ldlm_lockname[lock->l_granted_mode],                   \
 454                        ldlm_lockname[lock->l_req_mode],                       \
 455                        lock->l_resource->lr_name.name[0],                     \
 456                        lock->l_resource->lr_name.name[1],                     \
 457                        lock->l_resource->lr_name.name[2],                     \
 458                        lock->l_policy_data.l_inodebits.bits,                  \
 459                        atomic_read(&lock->l_resource->lr_refcount),           \
 460                        ldlm_typename[lock->l_resource->lr_type],              \
 461                        lock->l_flags, lock->l_remote_handle.cookie,           \
 462                        lock->l_export ?                                       \
 463                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 464                        lock->l_pid);                                          \
 465                 break;                                                        \
 466         }                                                                     \
 467         {                                                                     \
 468                 CDEBUG(level, "### " format                                   \
 469                        " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "  \
 470                        "res: "LPU64"/"LPU64"/"LPU64"/"LPU64" rrc: %d type: %s " \
 471                        "flags: %x remote: "LPX64" expref: %d "                \
 472                        "pid: %u\n" , ## a,                                    \
 473                        lock->l_resource->lr_namespace->ns_name,               \
 474                        lock, lock->l_handle.h_cookie,                         \
 475                        atomic_read (&lock->l_refc),                           \
 476                        lock->l_readers, lock->l_writers,                      \
 477                        ldlm_lockname[lock->l_granted_mode],                   \
 478                        ldlm_lockname[lock->l_req_mode],                       \
 479                        lock->l_resource->lr_name.name[0],                     \
 480                        lock->l_resource->lr_name.name[1],                     \
 481                        lock->l_resource->lr_name.name[2],                     \
 482                        lock->l_resource->lr_name.name[3],                     \
 483                        atomic_read(&lock->l_resource->lr_refcount),           \
 484                        ldlm_typename[lock->l_resource->lr_type],              \
 485                        lock->l_flags, lock->l_remote_handle.cookie,           \
 486                        lock->l_export ?                                       \
 487                        atomic_read(&lock->l_export->exp_refcount) : -99,      \
 488                        lock->l_pid);                                          \
 489         }                                                                     \
 490 } while (0)
 491
 492 #define LDLM_DEBUG(lock, format, a...) __LDLM_DEBUG(D_DLMTRACE, lock, \
 493                                                     format, ## a)
 494 #define LDLM_ERROR(lock, format, a...) __LDLM_DEBUG(D_ERROR, lock, format, ## a)
 495
 496 #define LDLM_DEBUG_NOLOCK(format, a...)                 \
 497         CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
 498
 499 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
 500                                       int first_enq, ldlm_error_t *err,
 501                                       struct list_head *work_list);
 502
 503 /*
 504  * Iterators.
 505  */
 506
 507 #define LDLM_ITER_CONTINUE 1 /* keep iterating */
 508 #define LDLM_ITER_STOP     2 /* stop iterating */
 509
 510 typedef int (*ldlm_iterator_t)(struct ldlm_lock *, void *);
 511 typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *);
 512
 513 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
 514                           void *closure);
 515 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
 516                            void *closure);
 517 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
 518                                ldlm_res_iterator_t iter, void *closure);
 519
 520 int ldlm_replay_locks(struct obd_import *imp);
 521 void ldlm_change_cbdata(struct ldlm_namespace *, struct ldlm_res_id *,
 522                         ldlm_iterator_t iter, void *data);
 523
 524 /* ldlm_flock.c */
 525 int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 526
 527 /* ldlm_extent.c */
 528 __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
 529
 530
 531 /* ldlm_lockd.c */
 532 int ldlm_server_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *,
 533                              void *data, int flag);
 534 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 535 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data);
 536 int ldlm_handle_enqueue(struct ptlrpc_request *req, ldlm_completion_callback,
 537                         ldlm_blocking_callback, ldlm_glimpse_callback);
 538 int ldlm_handle_convert(struct ptlrpc_request *req);
 539 int ldlm_handle_cancel(struct ptlrpc_request *req);
 540 int ldlm_del_waiting_lock(struct ldlm_lock *lock);
 541 int ldlm_get_ref(void);
 542 void ldlm_put_ref(int force);
 543
 544 /* ldlm_lock.c */
 545 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res);
 546 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg);
 547 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
 548 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *, int flags);
 549 void ldlm_cancel_callback(struct ldlm_lock *);
 550 int ldlm_lock_set_data(struct lustre_handle *, void *data);
 551 void ldlm_lock_remove_from_lru(struct ldlm_lock *);
 552 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *,
 553                                       struct lustre_handle *);
 554
 555 static inline struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *h)
 556 {
 557         return __ldlm_handle2lock(h, 0);
 558 }
 559
 560 #define LDLM_LOCK_PUT(lock)                     \
 561 do {                                            \
 562         /*LDLM_DEBUG((lock), "put");*/          \
 563         ldlm_lock_put(lock);                    \
 564 } while (0)
 565
 566 #define LDLM_LOCK_GET(lock)                     \
 567 ({                                              \
 568         ldlm_lock_get(lock);                    \
 569         /*LDLM_DEBUG((lock), "get");*/          \
 570         lock;                                   \
 571 })
 572
 573 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 574 void ldlm_lock_put(struct ldlm_lock *lock);
 575 void ldlm_lock_destroy(struct ldlm_lock *lock);
 576 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
 577 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode);
 578 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode);
 579 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode);
 580 void ldlm_lock_allow_match(struct ldlm_lock *lock);
 581 int ldlm_lock_match(struct ldlm_namespace *ns, int flags, struct ldlm_res_id *,
 582                     __u32 type, ldlm_policy_data_t *, ldlm_mode_t mode,
 583                     struct lustre_handle *);
 584 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
 585                                         int *flags);
 586 void ldlm_lock_cancel(struct ldlm_lock *lock);
 587 void ldlm_cancel_locks_for_export(struct obd_export *export);
 588 void ldlm_reprocess_all(struct ldlm_resource *res);
 589 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns);
 590 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos);
 591 void ldlm_lock_dump_handle(int level, struct lustre_handle *);
 592
 593 /* ldlm_test.c */
 594 int ldlm_test(struct obd_device *device, struct lustre_handle *connh);
 595 int ldlm_regression_start(struct obd_device *obddev,
 596                           struct lustre_handle *connh,
 597                           unsigned int threads, unsigned int max_locks_in,
 598                           unsigned int num_resources_in,
 599                           unsigned int num_extents_in);
 600 int ldlm_regression_stop(void);
 601
 602
 603 /* resource.c */
 604 struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
 605 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags);
 606 int ldlm_namespace_free(struct ldlm_namespace *ns, int force);
 607 int ldlm_proc_setup(void);
 608 void ldlm_proc_cleanup(void);
 609
 610 /* resource.c - internal */
 611 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
 612                                         struct ldlm_resource *parent,
 613                                         struct ldlm_res_id, __u32 type,
 614                                         int create);
 615 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
 616 int ldlm_resource_putref(struct ldlm_resource *res);
 617 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
 618                             struct ldlm_lock *lock);
 619 void ldlm_resource_unlink_lock(struct ldlm_lock *lock);
 620 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
 621 void ldlm_dump_all_namespaces(int level);
 622 void ldlm_namespace_dump(int level, struct ldlm_namespace *);
 623 void ldlm_resource_dump(int level, struct ldlm_resource *);
 624 int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *,
 625                               struct ldlm_res_id);
 626
 627 /* ldlm_request.c */
 628 int ldlm_expired_completion_wait(void *data);
 629 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
 630 int ldlm_cli_enqueue(struct obd_export *exp,
 631                      struct ptlrpc_request *req,
 632                      struct ldlm_namespace *ns,
 633                      struct ldlm_res_id,
 634                      __u32 type,
 635                      ldlm_policy_data_t *,
 636                      ldlm_mode_t mode,
 637                      int *flags,
 638                      ldlm_blocking_callback blocking,
 639                      ldlm_completion_callback completion,
 640                      ldlm_glimpse_callback glimpse,
 641                      void *data,
 642                      void *lvb,
 643                      __u32 lvb_len,
 644                      void *lvb_swabber,
 645                      struct lustre_handle *lockh);
 646 int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
 647                     void *data, __u32 data_len);
 648 int ldlm_cli_convert(struct lustre_handle *, int new_mode, int *flags);
 649 int ldlm_cli_cancel(struct lustre_handle *lockh);
 650 int ldlm_cli_cancel_unused(struct ldlm_namespace *, struct ldlm_res_id *,
 651                            int flags, void *opaque);
 652
 653 /* mds/handler.c */
 654 /* This has to be here because recursive inclusion sucks. */
 655 int intent_disposition(struct ldlm_reply *rep, int flag);
 656 void intent_set_disposition(struct ldlm_reply *rep, int flag);
 657 int mds_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 658                      void *data, int flag);
 659
 660
 661 /* ioctls for trying requests */
 662 #define IOC_LDLM_TYPE                   'f'
 663 #define IOC_LDLM_MIN_NR                 40
 664
 665 #define IOC_LDLM_TEST                   _IOWR('f', 40, long)
 666 #define IOC_LDLM_DUMP                   _IOWR('f', 41, long)
 667 #define IOC_LDLM_REGRESS_START          _IOWR('f', 42, long)
 668 #define IOC_LDLM_REGRESS_STOP           _IOWR('f', 43, long)
 669 #define IOC_LDLM_MAX_NR                 43
 670
 671 static inline void lock_res(struct ldlm_resource *res)
 672 {
 673         spin_lock(&res->lr_lock);
 674 }
 675
 676 static inline void unlock_res(struct ldlm_resource *res)
 677 {
 678         spin_unlock(&res->lr_lock);
 679 }
 680
 681 static inline void check_res_locked(struct ldlm_resource *res)
 682 {
 683         LASSERT_SPIN_LOCKED(&res->lr_lock);
 684 }
 685
 686 struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
 687 void unlock_res_and_lock(struct ldlm_lock *lock);
 688
 689 #endif