lustre/ldlm/ldlm_lock.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
   5  *   Author: Peter Braam <braam@clusterfs.com>
   6  *   Author: Phil Schwan <phil@clusterfs.com>
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LDLM
  25
  26 #ifdef __KERNEL__
  27 # include <linux/slab.h>
  28 # include <linux/dcache.h>
  29 # include <linux/namei.h>
  30 # include <linux/module.h>
  31 # include <linux/lustre_dlm.h>
  32 #else
  33 # include <liblustre.h>
  34 # include <libcfs/kp30.h>
  35 #endif
  36
  37 #include <linux/obd_class.h>
  38 #include "ldlm_internal.h"
  39
  40 //struct lustre_lock ldlm_everything_lock;
  41
  42 /* lock types */
  43 char *ldlm_lockname[] = {
  44         [0] "--",
  45         [LCK_EX] "EX",
  46         [LCK_PW] "PW",
  47         [LCK_PR] "PR",
  48         [LCK_CW] "CW",
  49         [LCK_CR] "CR",
  50         [LCK_NL] "NL",
  51         [LCK_GROUP] "GROUP"
  52 };
  53 char *ldlm_typename[] = {
  54         [LDLM_PLAIN] "PLN",
  55         [LDLM_EXTENT] "EXT",
  56         [LDLM_FLOCK] "FLK",
  57         [LDLM_IBITS] "IBT",
  58 };
  59
  60 char *ldlm_it2str(int it)
  61 {
  62         switch (it) {
  63         case IT_OPEN:
  64                 return "open";
  65         case IT_CREAT:
  66                 return "creat";
  67         case (IT_OPEN | IT_CREAT):
  68                 return "open|creat";
  69         case IT_READDIR:
  70                 return "readdir";
  71         case IT_GETATTR:
  72                 return "getattr";
  73         case IT_LOOKUP:
  74                 return "lookup";
  75         case IT_UNLINK:
  76                 return "unlink";
  77         case IT_GETXATTR:
  78                 return "getxattr";
  79         case IT_CHDIR:
  80                 return "chdir";
  81         default:
  82                 CERROR("Unknown intent %d\n", it);
  83                 return "UNKNOWN";
  84         }
  85 }
  86
  87 extern kmem_cache_t *ldlm_lock_slab;
  88 struct lustre_lock ldlm_handle_lock;
  89
  90 static ldlm_processing_policy ldlm_processing_policy_table[] = {
  91         [LDLM_PLAIN] ldlm_process_plain_lock,
  92         [LDLM_EXTENT] ldlm_process_extent_lock,
  93 #ifdef __KERNEL__
  94         [LDLM_FLOCK] ldlm_process_flock_lock,
  95 #endif
  96         [LDLM_IBITS] ldlm_process_inodebits_lock,
  97 };
  98
  99 ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res)
 100 {
 101         return ldlm_processing_policy_table[res->lr_type];
 102 }
 103
 104 void ldlm_register_intent(struct ldlm_namespace *ns, ldlm_res_policy arg)
 105 {
 106         ns->ns_policy = arg;
 107 }
 108
 109 /*
 110  * REFCOUNTED LOCK OBJECTS
 111  */
 112
 113
 114 /*
 115  * Lock refcounts, during creation:
 116  *   - one special one for allocation, dec'd only once in destroy
 117  *   - one for being a lock that's in-use
 118  *   - one for the addref associated with a new lock
 119  */
 120 struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock)
 121 {
 122         atomic_inc(&lock->l_refc);
 123         return lock;
 124 }
 125
 126 void ldlm_lock_put(struct ldlm_lock *lock)
 127 {
 128         ENTRY;
 129
 130         if (atomic_dec_and_test(&lock->l_refc)) {
 131                 struct ldlm_namespace *ns = lock->l_resource->lr_namespace;
 132
 133                 l_lock(&ns->ns_lock);
 134                 LDLM_DEBUG(lock, "final lock_put on destroyed lock, freeing");
 135                 LASSERT(lock->l_destroyed);
 136                 LASSERT(list_empty(&lock->l_res_link));
 137
 138                 spin_lock(&ns->ns_counter_lock);
 139                 ns->ns_locks--;
 140                 spin_unlock(&ns->ns_counter_lock);
 141
 142                 ldlm_resource_putref(lock->l_resource);
 143                 lock->l_resource = NULL;
 144                 if (lock->l_export)
 145                         class_export_put(lock->l_export);
 146
 147                 if (lock->l_parent)
 148                         LDLM_LOCK_PUT(lock->l_parent);
 149
 150                 if (lock->l_lvb_data != NULL)
 151                         OBD_FREE(lock->l_lvb_data, lock->l_lvb_len);
 152
 153                 OBD_SLAB_FREE(lock, ldlm_lock_slab, sizeof(*lock));
 154                 l_unlock(&ns->ns_lock);
 155         }
 156
 157         EXIT;
 158 }
 159
 160 void ldlm_lock_remove_from_lru(struct ldlm_lock *lock)
 161 {
 162         ENTRY;
 163         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 164         if (!list_empty(&lock->l_lru)) {
 165                 list_del_init(&lock->l_lru);
 166                 lock->l_resource->lr_namespace->ns_nr_unused--;
 167                 LASSERT(lock->l_resource->lr_namespace->ns_nr_unused >= 0);
 168         }
 169         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 170         EXIT;
 171 }
 172
 173 /* This used to have a 'strict' flact, which recovery would use to mark an
 174  * in-use lock as needing-to-die.  Lest I am ever tempted to put it back, I
 175  * shall explain why it's gone: with the new hash table scheme, once you call
 176  * ldlm_lock_destroy, you can never drop your final references on this lock.
 177  * Because it's not in the hash table anymore.  -phil */
 178 void ldlm_lock_destroy(struct ldlm_lock *lock)
 179 {
 180         ENTRY;
 181         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 182
 183         if (!list_empty(&lock->l_children)) {
 184                 LDLM_ERROR(lock, "still has children (%p)!",
 185                            lock->l_children.next);
 186                 ldlm_lock_dump(D_ERROR, lock, 0);
 187                 LBUG();
 188         }
 189         if (lock->l_readers || lock->l_writers) {
 190                 LDLM_ERROR(lock, "lock still has references");
 191                 ldlm_lock_dump(D_ERROR, lock, 0);
 192                 LBUG();
 193         }
 194
 195         if (!list_empty(&lock->l_res_link)) {
 196                 LDLM_ERROR(lock, "lock still on resource");
 197                 ldlm_lock_dump(D_ERROR, lock, 0);
 198                 LBUG();
 199         }
 200
 201         if (lock->l_destroyed) {
 202                 LASSERT(list_empty(&lock->l_lru));
 203                 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 204                 EXIT;
 205                 return;
 206         }
 207         lock->l_destroyed = 1;
 208
 209         list_del_init(&lock->l_export_chain);
 210         ldlm_lock_remove_from_lru(lock);
 211         class_handle_unhash(&lock->l_handle);
 212
 213 #if 0
 214         /* Wake anyone waiting for this lock */
 215         /* FIXME: I should probably add yet another flag, instead of using
 216          * l_export to only call this on clients */
 217         if (lock->l_export)
 218                 class_export_put(lock->l_export);
 219         lock->l_export = NULL;
 220         if (lock->l_export && lock->l_completion_ast)
 221                 lock->l_completion_ast(lock, 0);
 222 #endif
 223
 224         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 225         LDLM_LOCK_PUT(lock);
 226         EXIT;
 227 }
 228
 229 /* this is called by portals_handle2object with the handle lock taken */
 230 static void lock_handle_addref(void *lock)
 231 {
 232         LDLM_LOCK_GET((struct ldlm_lock *)lock);
 233 }
 234
 235 /*
 236  * usage: pass in a resource on which you have done ldlm_resource_get
 237  *        pass in a parent lock on which you have done a ldlm_lock_get
 238  *        after return, ldlm_*_put the resource and parent
 239  * returns: lock with refcount 2 - one for current caller and one for remote
 240  */
 241 static struct ldlm_lock *ldlm_lock_new(struct ldlm_lock *parent,
 242                                        struct ldlm_resource *resource)
 243 {
 244         struct ldlm_lock *lock;
 245         ENTRY;
 246
 247         if (resource == NULL)
 248                 LBUG();
 249
 250         OBD_SLAB_ALLOC(lock, ldlm_lock_slab, SLAB_NOFS, sizeof(*lock));
 251         if (lock == NULL)
 252                 RETURN(NULL);
 253
 254         lock->l_resource = ldlm_resource_getref(resource);
 255
 256         atomic_set(&lock->l_refc, 2);
 257         INIT_LIST_HEAD(&lock->l_children);
 258         INIT_LIST_HEAD(&lock->l_res_link);
 259         INIT_LIST_HEAD(&lock->l_lru);
 260         INIT_LIST_HEAD(&lock->l_export_chain);
 261         INIT_LIST_HEAD(&lock->l_pending_chain);
 262         init_waitqueue_head(&lock->l_waitq);
 263
 264         spin_lock(&resource->lr_namespace->ns_counter_lock);
 265         resource->lr_namespace->ns_locks++;
 266         spin_unlock(&resource->lr_namespace->ns_counter_lock);
 267
 268         if (parent != NULL) {
 269                 l_lock(&parent->l_resource->lr_namespace->ns_lock);
 270                 lock->l_parent = LDLM_LOCK_GET(parent);
 271                 list_add(&lock->l_childof, &parent->l_children);
 272                 l_unlock(&parent->l_resource->lr_namespace->ns_lock);
 273         }
 274
 275         INIT_LIST_HEAD(&lock->l_handle.h_link);
 276         class_handle_hash(&lock->l_handle, lock_handle_addref);
 277
 278         RETURN(lock);
 279 }
 280
 281 int ldlm_lock_change_resource(struct ldlm_namespace *ns, struct ldlm_lock *lock,
 282                               struct ldlm_res_id new_resid)
 283 {
 284         struct ldlm_resource *oldres = lock->l_resource;
 285         ENTRY;
 286
 287         l_lock(&ns->ns_lock);
 288         if (memcmp(&new_resid, &lock->l_resource->lr_name,
 289                    sizeof(lock->l_resource->lr_name)) == 0) {
 290                 /* Nothing to do */
 291                 l_unlock(&ns->ns_lock);
 292                 RETURN(0);
 293         }
 294
 295         LASSERT(new_resid.name[0] != 0);
 296
 297         /* This function assumes that the lock isn't on any lists */
 298         LASSERT(list_empty(&lock->l_res_link));
 299
 300         lock->l_resource = ldlm_resource_get(ns, NULL, new_resid,
 301                                              lock->l_resource->lr_type, 1);
 302         if (lock->l_resource == NULL) {
 303                 LBUG();
 304                 RETURN(-ENOMEM);
 305         }
 306
 307         /* ...and the flowers are still standing! */
 308         ldlm_resource_putref(oldres);
 309
 310         l_unlock(&ns->ns_lock);
 311         RETURN(0);
 312 }
 313
 314 /*
 315  *  HANDLES
 316  */
 317
 318 void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh)
 319 {
 320         lockh->cookie = lock->l_handle.h_cookie;
 321 }
 322
 323 /* if flags: atomically get the lock and set the flags.
 324  *           Return NULL if flag already set
 325  */
 326
 327 struct ldlm_lock *__ldlm_handle2lock(struct lustre_handle *handle, int flags)
 328 {
 329         struct ldlm_namespace *ns;
 330         struct ldlm_lock *lock = NULL, *retval = NULL;
 331         ENTRY;
 332
 333         LASSERT(handle);
 334
 335         lock = class_handle2object(handle->cookie);
 336         if (lock == NULL)
 337                 RETURN(NULL);
 338
 339         LASSERT(lock->l_resource != NULL);
 340         ns = lock->l_resource->lr_namespace;
 341         LASSERT(ns != NULL);
 342
 343         l_lock(&ns->ns_lock);
 344
 345         /* It's unlikely but possible that someone marked the lock as
 346          * destroyed after we did handle2object on it */
 347         if (lock->l_destroyed) {
 348                 CDEBUG(D_INFO, "lock already destroyed: lock %p\n", lock);
 349                 LDLM_LOCK_PUT(lock);
 350                 GOTO(out, retval);
 351         }
 352
 353         if (flags && (lock->l_flags & flags)) {
 354                 LDLM_LOCK_PUT(lock);
 355                 GOTO(out, retval);
 356         }
 357
 358         if (flags)
 359                 lock->l_flags |= flags;
 360
 361         retval = lock;
 362         EXIT;
 363  out:
 364         l_unlock(&ns->ns_lock);
 365         return retval;
 366 }
 367
 368 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *ns,
 369                                       struct lustre_handle *handle)
 370 {
 371         struct ldlm_lock *retval = NULL;
 372
 373         l_lock(&ns->ns_lock);
 374         retval = __ldlm_handle2lock(handle, 0);
 375         l_unlock(&ns->ns_lock);
 376
 377         return retval;
 378 }
 379
 380 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc)
 381 {
 382         ldlm_res2desc(lock->l_resource, &desc->l_resource);
 383         desc->l_req_mode = lock->l_req_mode;
 384         desc->l_granted_mode = lock->l_granted_mode;
 385         memcpy(&desc->l_policy_data, &lock->l_policy_data,
 386                sizeof(desc->l_policy_data));
 387 }
 388
 389 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
 390                             void *data, int datalen)
 391 {
 392         struct ldlm_ast_work *w;
 393         ENTRY;
 394
 395         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 396         if (new && (lock->l_flags & LDLM_FL_AST_SENT))
 397                 GOTO(out, 0);
 398
 399         CDEBUG(D_OTHER, "lock %p incompatible; sending blocking AST.\n", lock);
 400
 401         OBD_ALLOC(w, sizeof(*w));
 402         if (!w) {
 403                 LBUG();
 404                 GOTO(out, 0);
 405         }
 406
 407         w->w_data = data;
 408         w->w_datalen = datalen;
 409         if (new) {
 410                 LDLM_DEBUG(lock, "lock incompatible; sending blocking AST.");
 411                 lock->l_flags |= LDLM_FL_AST_SENT;
 412                 /* If the enqueuing client said so, tell the AST recipient to
 413                  * discard dirty data, rather than writing back. */
 414                 if (new->l_flags & LDLM_AST_DISCARD_DATA)
 415                         lock->l_flags |= LDLM_FL_DISCARD_DATA;
 416                 w->w_blocking = 1;
 417                 ldlm_lock2desc(new, &w->w_desc);
 418         }
 419
 420         w->w_lock = LDLM_LOCK_GET(lock);
 421         list_add(&w->w_list, lock->l_resource->lr_tmp);
 422         EXIT;
 423  out:
 424         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 425 }
 426
 427 void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode)
 428 {
 429         struct ldlm_lock *lock;
 430
 431         lock = ldlm_handle2lock(lockh);
 432         ldlm_lock_addref_internal(lock, mode);
 433         LDLM_LOCK_PUT(lock);
 434 }
 435
 436 /* only called for local locks */
 437 void ldlm_lock_addref_internal(struct ldlm_lock *lock, __u32 mode)
 438 {
 439         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 440         ldlm_lock_remove_from_lru(lock);
 441         if (mode & (LCK_NL | LCK_CR | LCK_PR))
 442                 lock->l_readers++;
 443         if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP))
 444                 lock->l_writers++;
 445         lock->l_last_used = jiffies;
 446         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 447         LDLM_LOCK_GET(lock);
 448         LDLM_DEBUG(lock, "ldlm_lock_addref(%s)", ldlm_lockname[mode]);
 449 }
 450
 451 void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
 452 {
 453         struct ldlm_namespace *ns;
 454         ENTRY;
 455
 456         LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
 457         ns = lock->l_resource->lr_namespace;
 458         l_lock(&ns->ns_lock);
 459         if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
 460                 LASSERT(lock->l_readers > 0);
 461                 lock->l_readers--;
 462         }
 463         if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP)) {
 464                 LASSERT(lock->l_writers > 0);
 465                 lock->l_writers--;
 466         }
 467
 468         if (lock->l_flags & LDLM_FL_LOCAL &&
 469             !lock->l_readers && !lock->l_writers) {
 470                 /* If this is a local lock on a server namespace and this was
 471                  * the last reference, cancel the lock. */
 472                 CDEBUG(D_INFO, "forcing cancel of local lock\n");
 473                 lock->l_flags |= LDLM_FL_CBPENDING;
 474         }
 475
 476         if (!lock->l_readers && !lock->l_writers &&
 477             (lock->l_flags & LDLM_FL_CBPENDING)) {
 478                 /* If we received a blocked AST and this was the last reference,
 479                  * run the callback. */
 480                 if (ns->ns_client == LDLM_NAMESPACE_SERVER && lock->l_export)
 481                         CERROR("FL_CBPENDING set on non-local lock--just a "
 482                                "warning\n");
 483
 484                 LDLM_DEBUG(lock, "final decref done on cbpending lock");
 485
 486                 LDLM_LOCK_GET(lock); /* dropped by bl thread */
 487                 ldlm_lock_remove_from_lru(lock);
 488                 l_unlock(&ns->ns_lock);
 489                 if (ldlm_bl_to_thread(ns, NULL, lock) != 0)
 490                         ldlm_handle_bl_callback(ns, NULL, lock);
 491         } else if (ns->ns_client == LDLM_NAMESPACE_CLIENT &&
 492                    !lock->l_readers && !lock->l_writers) {
 493                 /* If this is a client-side namespace and this was the last
 494                  * reference, put it on the LRU. */
 495                 LASSERT(list_empty(&lock->l_lru));
 496                 LASSERT(ns->ns_nr_unused >= 0);
 497                 list_add_tail(&lock->l_lru, &ns->ns_unused_list);
 498                 ns->ns_nr_unused++;
 499                 l_unlock(&ns->ns_lock);
 500                 ldlm_cancel_lru(ns, LDLM_ASYNC);
 501         } else {
 502                 l_unlock(&ns->ns_lock);
 503         }
 504
 505         LDLM_LOCK_PUT(lock);    /* matches the ldlm_lock_get in addref */
 506
 507         EXIT;
 508 }
 509
 510 void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode)
 511 {
 512         struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
 513         LASSERT(lock != NULL);
 514         ldlm_lock_decref_internal(lock, mode);
 515         LDLM_LOCK_PUT(lock);
 516 }
 517
 518 /* This will drop a lock reference and mark it for destruction, but will not
 519  * necessarily cancel the lock before returning. */
 520 void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode)
 521 {
 522         struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
 523         ENTRY;
 524
 525         LASSERT(lock != NULL);
 526
 527         LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
 528         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 529         lock->l_flags |= LDLM_FL_CBPENDING;
 530         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 531         ldlm_lock_decref_internal(lock, mode);
 532         LDLM_LOCK_PUT(lock);
 533 }
 534
 535 /* NOTE: called by
 536  *  - ldlm_lock_enqueue
 537  *  - ldlm_reprocess_queue
 538  *  - ldlm_lock_convert
 539  */
 540 void ldlm_grant_lock(struct ldlm_lock *lock, void *data, int datalen,
 541                      int run_ast)
 542 {
 543         struct ldlm_resource *res = lock->l_resource;
 544         ENTRY;
 545
 546         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 547         lock->l_granted_mode = lock->l_req_mode;
 548         ldlm_resource_add_lock(res, &res->lr_granted, lock);
 549
 550         if (lock->l_granted_mode < res->lr_most_restr)
 551                 res->lr_most_restr = lock->l_granted_mode;
 552
 553         if (run_ast && lock->l_completion_ast != NULL)
 554                 ldlm_add_ast_work_item(lock, NULL, data, datalen);
 555
 556         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 557         EXIT;
 558 }
 559
 560 /* returns a referenced lock or NULL.  See the flag descriptions below, in the
 561  * comment above ldlm_lock_match */
 562 static struct ldlm_lock *search_queue(struct list_head *queue, ldlm_mode_t mode,
 563                                       ldlm_policy_data_t *policy,
 564                                       struct ldlm_lock *old_lock, int flags)
 565 {
 566         struct ldlm_lock *lock;
 567         struct list_head *tmp;
 568
 569         list_for_each(tmp, queue) {
 570                 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
 571
 572                 if (lock == old_lock)
 573                         break;
 574
 575                 /* llite sometimes wants to match locks that will be
 576                  * canceled when their users drop, but we allow it to match
 577                  * if it passes in CBPENDING and the lock still has users.
 578                  * this is generally only going to be used by children
 579                  * whose parents already hold a lock so forward progress
 580                  * can still happen. */
 581                 if (lock->l_flags & LDLM_FL_CBPENDING &&
 582                     !(flags & LDLM_FL_CBPENDING))
 583                         continue;
 584                 if (lock->l_flags & LDLM_FL_CBPENDING &&
 585                     lock->l_readers == 0 && lock->l_writers == 0)
 586                         continue;
 587
 588                 if (!(lock->l_req_mode & mode))
 589                         continue;
 590
 591                 if (lock->l_resource->lr_type == LDLM_EXTENT &&
 592                     (lock->l_policy_data.l_extent.start >
 593                      policy->l_extent.start ||
 594                      lock->l_policy_data.l_extent.end < policy->l_extent.end))
 595                         continue;
 596
 597                 if (lock->l_resource->lr_type == LDLM_EXTENT &&
 598                     mode == LCK_GROUP &&
 599                     lock->l_policy_data.l_extent.gid != policy->l_extent.gid)
 600                         continue;
 601
 602                 /* We match if we have existing lock with same or wider set
 603                    of bits. */
 604                 if (lock->l_resource->lr_type == LDLM_IBITS &&
 605                      ((lock->l_policy_data.l_inodebits.bits &
 606                       policy->l_inodebits.bits) !=
 607                       policy->l_inodebits.bits))
 608                         continue;
 609
 610                 if (lock->l_destroyed)
 611                         continue;
 612
 613                 if ((flags & LDLM_FL_LOCAL_ONLY) &&
 614                     !(lock->l_flags & LDLM_FL_LOCAL))
 615                         continue;
 616
 617                 if (flags & LDLM_FL_TEST_LOCK)
 618                         LDLM_LOCK_GET(lock);
 619                 else
 620                         ldlm_lock_addref_internal(lock, mode);
 621                 return lock;
 622         }
 623
 624         return NULL;
 625 }
 626
 627 void ldlm_lock_allow_match(struct ldlm_lock *lock)
 628 {
 629         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 630         lock->l_flags |= LDLM_FL_CAN_MATCH;
 631         wake_up(&lock->l_waitq);
 632         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 633 }
 634
 635 /* Can be called in two ways:
 636  *
 637  * If 'ns' is NULL, then lockh describes an existing lock that we want to look
 638  * for a duplicate of.
 639  *
 640  * Otherwise, all of the fields must be filled in, to match against.
 641  *
 642  * If 'flags' contains LDLM_FL_LOCAL_ONLY, then only match local locks on the
 643  *     server (ie, connh is NULL)
 644  * If 'flags' contains LDLM_FL_BLOCK_GRANTED, then only locks on the granted
 645  *     list will be considered
 646  * If 'flags' contains LDLM_FL_CBPENDING, then locks that have been marked
 647  *     to be canceled can still be matched as long as they still have reader
 648  *     or writer refernces
 649  * If 'flags' contains LDLM_FL_TEST_LOCK, then don't actually reference a lock,
 650  *     just tell us if we would have matched.
 651  *
 652  * Returns 1 if it finds an already-existing lock that is compatible; in this
 653  * case, lockh is filled in with a addref()ed lock
 654  */
 655 int ldlm_lock_match(struct ldlm_namespace *ns, int flags,
 656                     struct ldlm_res_id *res_id, __u32 type,
 657                     ldlm_policy_data_t *policy, ldlm_mode_t mode,
 658                     struct lustre_handle *lockh)
 659 {
 660         struct ldlm_resource *res;
 661         struct ldlm_lock *lock, *old_lock = NULL;
 662         int rc = 0;
 663         ENTRY;
 664
 665         if (ns == NULL) {
 666                 old_lock = ldlm_handle2lock(lockh);
 667                 LASSERT(old_lock);
 668
 669                 ns = old_lock->l_resource->lr_namespace;
 670                 res_id = &old_lock->l_resource->lr_name;
 671                 type = old_lock->l_resource->lr_type;
 672                 mode = old_lock->l_req_mode;
 673         }
 674
 675         res = ldlm_resource_get(ns, NULL, *res_id, type, 0);
 676         if (res == NULL) {
 677                 LASSERT(old_lock == NULL);
 678                 RETURN(0);
 679         }
 680
 681         l_lock(&ns->ns_lock);
 682
 683         lock = search_queue(&res->lr_granted, mode, policy, old_lock, flags);
 684         if (lock != NULL)
 685                 GOTO(out, rc = 1);
 686         if (flags & LDLM_FL_BLOCK_GRANTED)
 687                 GOTO(out, rc = 0);
 688         lock = search_queue(&res->lr_converting, mode, policy, old_lock, flags);
 689         if (lock != NULL)
 690                 GOTO(out, rc = 1);
 691         lock = search_queue(&res->lr_waiting, mode, policy, old_lock, flags);
 692         if (lock != NULL)
 693                 GOTO(out, rc = 1);
 694
 695         EXIT;
 696  out:
 697         ldlm_resource_putref(res);
 698         l_unlock(&ns->ns_lock);
 699
 700         if (lock) {
 701                 ldlm_lock2handle(lock, lockh);
 702                 if (!(lock->l_flags & LDLM_FL_CAN_MATCH)) {
 703                         struct l_wait_info lwi;
 704                         if (lock->l_completion_ast)
 705                                 lock->l_completion_ast(lock,
 706                                                        LDLM_FL_WAIT_NOREPROC,
 707                                                        NULL);
 708
 709                         lwi = LWI_TIMEOUT_INTR(obd_timeout*HZ, NULL,NULL,NULL);
 710
 711                         /* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
 712                         l_wait_event(lock->l_waitq,
 713                                      (lock->l_flags & LDLM_FL_CAN_MATCH), &lwi);
 714                 }
 715         }
 716         if (rc)
 717                 LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
 718                            type == LDLM_PLAIN ? res_id->name[2] :
 719                                 policy->l_extent.start,
 720                            type == LDLM_PLAIN ? res_id->name[3] :
 721                                 policy->l_extent.end);
 722         else if (!(flags & LDLM_FL_TEST_LOCK)) /* less verbose for test-only */
 723                 LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
 724                                   LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
 725                                   type, mode, res_id->name[0], res_id->name[1],
 726                                   type == LDLM_PLAIN ? res_id->name[2] :
 727                                         policy->l_extent.start,
 728                                   type == LDLM_PLAIN ? res_id->name[3] :
 729                                         policy->l_extent.end);
 730
 731         if (old_lock)
 732                 LDLM_LOCK_PUT(old_lock);
 733         if (flags & LDLM_FL_TEST_LOCK && rc)
 734                 LDLM_LOCK_PUT(lock);
 735
 736         return rc;
 737 }
 738
 739 /* Returns a referenced lock */
 740 struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
 741                                    struct lustre_handle *parent_lock_handle,
 742                                    struct ldlm_res_id res_id, __u32 type,
 743                                    ldlm_mode_t mode,
 744                                    ldlm_blocking_callback blocking,
 745                                    ldlm_completion_callback completion,
 746                                    ldlm_glimpse_callback glimpse,
 747                                    void *data, __u32 lvb_len)
 748 {
 749         struct ldlm_resource *res, *parent_res = NULL;
 750         struct ldlm_lock *lock, *parent_lock = NULL;
 751         ENTRY;
 752
 753         if (parent_lock_handle) {
 754                 parent_lock = ldlm_handle2lock(parent_lock_handle);
 755                 if (parent_lock)
 756                         parent_res = parent_lock->l_resource;
 757         }
 758
 759         res = ldlm_resource_get(ns, parent_res, res_id, type, 1);
 760         if (res == NULL)
 761                 RETURN(NULL);
 762
 763         lock = ldlm_lock_new(parent_lock, res);
 764         ldlm_resource_putref(res);
 765         if (parent_lock != NULL)
 766                 LDLM_LOCK_PUT(parent_lock);
 767
 768         if (lock == NULL)
 769                 RETURN(NULL);
 770
 771         lock->l_req_mode = mode;
 772         lock->l_ast_data = data;
 773         lock->l_blocking_ast = blocking;
 774         lock->l_completion_ast = completion;
 775         lock->l_glimpse_ast = glimpse;
 776
 777         if (lvb_len) {
 778                 lock->l_lvb_len = lvb_len;
 779                 OBD_ALLOC(lock->l_lvb_data, lvb_len);
 780                 if (lock->l_lvb_data == NULL) {
 781                         OBD_SLAB_FREE(lock, ldlm_lock_slab, sizeof(*lock));
 782                         RETURN(NULL);
 783                 }
 784         }
 785
 786         RETURN(lock);
 787 }
 788
 789 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
 790                                struct ldlm_lock **lockp,
 791                                void *cookie, int *flags)
 792 {
 793         struct ldlm_lock *lock = *lockp;
 794         struct ldlm_resource *res = lock->l_resource;
 795         int local = res->lr_namespace->ns_client;
 796         ldlm_processing_policy policy;
 797         ldlm_error_t rc = ELDLM_OK;
 798         ENTRY;
 799
 800         /* policies are not executed on the client or during replay */
 801         if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
 802             && !local && ns->ns_policy) {
 803                 rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
 804                                    NULL);
 805                 if (rc == ELDLM_LOCK_REPLACED) {
 806                         /* The lock that was returned has already been granted,
 807                          * and placed into lockp.  If it's not the same as the
 808                          * one we passed in, then destroy the old one and our
 809                          * work here is done. */
 810                         if (lock != *lockp) {
 811                                 ldlm_lock_destroy(lock);
 812                                 LDLM_LOCK_PUT(lock);
 813                         }
 814                         *flags |= LDLM_FL_LOCK_CHANGED;
 815                         RETURN(0);
 816                 } else if (rc == ELDLM_LOCK_ABORTED ||
 817                            (rc == 0 && (*flags & LDLM_FL_INTENT_ONLY))) {
 818                         ldlm_lock_destroy(lock);
 819                         RETURN(rc);
 820                 }
 821                 LASSERT(rc == ELDLM_OK);
 822         }
 823
 824         l_lock(&ns->ns_lock);
 825         if (local && lock->l_req_mode == lock->l_granted_mode) {
 826                 /* The server returned a blocked lock, but it was granted before
 827                  * we got a chance to actually enqueue it.  We don't need to do
 828                  * anything else. */
 829                 *flags &= ~(LDLM_FL_BLOCK_GRANTED |
 830                             LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_WAIT);
 831                 GOTO(out, ELDLM_OK);
 832         }
 833
 834         /* Some flags from the enqueue want to make it into the AST, via the
 835          * lock's l_flags. */
 836         lock->l_flags |= (*flags & LDLM_AST_DISCARD_DATA);
 837
 838         /* This distinction between local lock trees is very important; a client
 839          * namespace only has information about locks taken by that client, and
 840          * thus doesn't have enough information to decide for itself if it can
 841          * be granted (below).  In this case, we do exactly what the server
 842          * tells us to do, as dictated by the 'flags'.
 843          *
 844          * We do exactly the same thing during recovery, when the server is
 845          * more or less trusting the clients not to lie.
 846          *
 847          * FIXME (bug 268): Detect obvious lies by checking compatibility in
 848          * granted/converting queues. */
 849         ldlm_resource_unlink_lock(lock);
 850         if (local) {
 851                 if (*flags & LDLM_FL_BLOCK_CONV)
 852                         ldlm_resource_add_lock(res, &res->lr_converting, lock);
 853                 else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
 854                         ldlm_resource_add_lock(res, &res->lr_waiting, lock);
 855                 else
 856                         ldlm_grant_lock(lock, NULL, 0, 0);
 857                 GOTO(out, ELDLM_OK);
 858         } else if (*flags & LDLM_FL_REPLAY) {
 859                 if (*flags & LDLM_FL_BLOCK_CONV) {
 860                         ldlm_resource_add_lock(res, &res->lr_converting, lock);
 861                         GOTO(out, ELDLM_OK);
 862                 } else if (*flags & LDLM_FL_BLOCK_WAIT) {
 863                         ldlm_resource_add_lock(res, &res->lr_waiting, lock);
 864                         GOTO(out, ELDLM_OK);
 865                 } else if (*flags & LDLM_FL_BLOCK_GRANTED) {
 866                         ldlm_grant_lock(lock, NULL, 0, 0);
 867                         GOTO(out, ELDLM_OK);
 868                 }
 869                 /* If no flags, fall through to normal enqueue path. */
 870         }
 871
 872         policy = ldlm_processing_policy_table[res->lr_type];
 873         policy(lock, flags, 1, &rc);
 874         EXIT;
 875 out:
 876         l_unlock(&ns->ns_lock);
 877         return rc;
 878 }
 879
 880 /* Must be called with namespace taken: queue is waiting or converting. */
 881 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue)
 882 {
 883         struct list_head *tmp, *pos;
 884         ldlm_processing_policy policy;
 885         int flags;
 886         int rc = LDLM_ITER_CONTINUE;
 887         ldlm_error_t err;
 888         ENTRY;
 889
 890         policy = ldlm_processing_policy_table[res->lr_type];
 891         LASSERT(policy);
 892
 893         list_for_each_safe(tmp, pos, queue) {
 894                 struct ldlm_lock *pending;
 895                 pending = list_entry(tmp, struct ldlm_lock, l_res_link);
 896
 897                 CDEBUG(D_INFO, "Reprocessing lock %p\n", pending);
 898
 899                 flags = 0;
 900                 rc = policy(pending, &flags, 0, &err);
 901                 if (rc != LDLM_ITER_CONTINUE)
 902                         break;
 903         }
 904
 905         RETURN(rc);
 906 }
 907
 908 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list)
 909 {
 910         struct list_head *tmp, *pos;
 911         int rc, retval = 0;
 912         ENTRY;
 913
 914         l_check_no_ns_lock(ns);
 915
 916         list_for_each_safe(tmp, pos, rpc_list) {
 917                 struct ldlm_ast_work *w =
 918                         list_entry(tmp, struct ldlm_ast_work, w_list);
 919
 920                 /* It's possible to receive a completion AST before we've set
 921                  * the l_completion_ast pointer: either because the AST arrived
 922                  * before the reply, or simply because there's a small race
 923                  * window between receiving the reply and finishing the local
 924                  * enqueue. (bug 842)
 925                  *
 926                  * This can't happen with the blocking_ast, however, because we
 927                  * will never call the local blocking_ast until we drop our
 928                  * reader/writer reference, which we won't do until we get the
 929                  * reply and finish enqueueing. */
 930                 LASSERT(w->w_lock != NULL);
 931                 if (w->w_blocking) {
 932                         LASSERT(w->w_lock->l_blocking_ast != NULL);
 933                         rc = w->w_lock->l_blocking_ast
 934                                 (w->w_lock, &w->w_desc, w->w_data,
 935                                  LDLM_CB_BLOCKING);
 936                 } else if (w->w_lock->l_completion_ast != NULL) {
 937                         LASSERT(w->w_lock->l_completion_ast != NULL);
 938                         rc = w->w_lock->l_completion_ast(w->w_lock, w->w_flags,
 939                                                          w->w_data);
 940                 } else {
 941                         rc = 0;
 942                 }
 943                 if (rc == -ERESTART)
 944                         retval = rc;
 945                 else if (rc)
 946                         CDEBUG(D_DLMTRACE, "Failed AST - should clean & "
 947                                "disconnect client\n");
 948                 LDLM_LOCK_PUT(w->w_lock);
 949                 list_del(&w->w_list);
 950                 OBD_FREE(w, sizeof(*w));
 951         }
 952         RETURN(retval);
 953 }
 954
 955 static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
 956 {
 957         ldlm_reprocess_all(res);
 958         return LDLM_ITER_CONTINUE;
 959 }
 960
 961 void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
 962 {
 963         int i, rc;
 964
 965         l_lock(&ns->ns_lock);
 966         for (i = 0; i < RES_HASH_SIZE; i++) {
 967                 struct list_head *tmp, *next;
 968                 list_for_each_safe(tmp, next, &(ns->ns_hash[i])) {
 969                         struct ldlm_resource *res =
 970                                 list_entry(tmp, struct ldlm_resource, lr_hash);
 971
 972                         ldlm_resource_getref(res);
 973                         l_unlock(&ns->ns_lock);
 974                         rc = reprocess_one_queue(res, NULL);
 975                         l_lock(&ns->ns_lock);
 976                         next = tmp->next;
 977                         ldlm_resource_putref(res);
 978                         if (rc == LDLM_ITER_STOP)
 979                                 GOTO(out, rc);
 980                 }
 981         }
 982  out:
 983         l_unlock(&ns->ns_lock);
 984         EXIT;
 985 }
 986
 987 void ldlm_reprocess_all(struct ldlm_resource *res)
 988 {
 989         struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
 990         int rc;
 991         ENTRY;
 992
 993         /* Local lock trees don't get reprocessed. */
 994         if (res->lr_namespace->ns_client) {
 995                 EXIT;
 996                 return;
 997         }
 998
 999  restart:
1000         l_lock(&res->lr_namespace->ns_lock);
1001         res->lr_tmp = &rpc_list;
1002
1003         rc = ldlm_reprocess_queue(res, &res->lr_converting);
1004         if (rc == LDLM_ITER_CONTINUE)
1005                 ldlm_reprocess_queue(res, &res->lr_waiting);
1006
1007         res->lr_tmp = NULL;
1008         l_unlock(&res->lr_namespace->ns_lock);
1009
1010         rc = ldlm_run_ast_work(res->lr_namespace, &rpc_list);
1011         if (rc == -ERESTART) {
1012                 LASSERT(list_empty(&rpc_list));
1013                 goto restart;
1014         }
1015         EXIT;
1016 }
1017
1018 void ldlm_cancel_callback(struct ldlm_lock *lock)
1019 {
1020         l_lock(&lock->l_resource->lr_namespace->ns_lock);
1021         if (!(lock->l_flags & LDLM_FL_CANCEL)) {
1022                 lock->l_flags |= LDLM_FL_CANCEL;
1023                 if (lock->l_blocking_ast) {
1024                         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
1025                         // l_check_no_ns_lock(lock->l_resource->lr_namespace);
1026                         lock->l_blocking_ast(lock, NULL, lock->l_ast_data,
1027                                              LDLM_CB_CANCELING);
1028                         return;
1029                 } else {
1030                         LDLM_DEBUG(lock, "no blocking ast");
1031                 }
1032         }
1033         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
1034 }
1035
1036 void ldlm_lock_cancel(struct ldlm_lock *lock)
1037 {
1038         struct ldlm_resource *res;
1039         struct ldlm_namespace *ns;
1040         ENTRY;
1041
1042         /* There's no race between calling this and taking the ns lock below;
1043          * a lock can only be put on the waiting list once, because it can only
1044          * issue a blocking AST once. */
1045         ldlm_del_waiting_lock(lock);
1046
1047         res = lock->l_resource;
1048         ns = res->lr_namespace;
1049
1050         l_lock(&ns->ns_lock);
1051         /* Please do not, no matter how tempting, remove this LBUG without
1052          * talking to me first. -phik */
1053         if (lock->l_readers || lock->l_writers) {
1054                 LDLM_ERROR(lock, "lock still has references");
1055                 LBUG();
1056         }
1057
1058         ldlm_cancel_callback(lock);
1059
1060         ldlm_resource_unlink_lock(lock);
1061         ldlm_lock_destroy(lock);
1062         l_unlock(&ns->ns_lock);
1063         EXIT;
1064 }
1065
1066 int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
1067 {
1068         struct ldlm_lock *lock = ldlm_handle2lock(lockh);
1069         ENTRY;
1070
1071         if (lock == NULL)
1072                 RETURN(-EINVAL);
1073
1074         lock->l_ast_data = data;
1075         LDLM_LOCK_PUT(lock);
1076         RETURN(0);
1077 }
1078
1079 void ldlm_cancel_locks_for_export(struct obd_export *exp)
1080 {
1081         struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
1082         struct ldlm_lock *lock;
1083         struct ldlm_resource *res;
1084
1085         l_lock(&ns->ns_lock);
1086         while(!list_empty(&exp->exp_ldlm_data.led_held_locks)) {
1087                 lock = list_entry(exp->exp_ldlm_data.led_held_locks.next,
1088                                   struct ldlm_lock, l_export_chain);
1089                 res = ldlm_resource_getref(lock->l_resource);
1090                 LDLM_DEBUG(lock, "export %p", exp);
1091                 ldlm_lock_cancel(lock);
1092                 l_unlock(&ns->ns_lock);
1093                 ldlm_reprocess_all(res);
1094                 ldlm_resource_putref(res);
1095                 l_lock(&ns->ns_lock);
1096         }
1097         l_unlock(&ns->ns_lock);
1098 }
1099
1100 struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
1101                                         int *flags)
1102 {
1103         struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1104         struct ldlm_resource *res;
1105         struct ldlm_namespace *ns;
1106         int granted = 0;
1107         int old_mode, rc;
1108         ldlm_error_t err;
1109         ENTRY;
1110
1111         if (new_mode == lock->l_granted_mode) { // No changes? Just return.
1112                 *flags |= LDLM_FL_BLOCK_GRANTED;
1113                 RETURN(lock->l_resource);
1114         }
1115
1116         LASSERTF(new_mode == LCK_PW && lock->l_granted_mode == LCK_PR,
1117                  "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
1118
1119         res = lock->l_resource;
1120         ns = res->lr_namespace;
1121
1122         l_lock(&ns->ns_lock);
1123
1124         old_mode = lock->l_req_mode;
1125         lock->l_req_mode = new_mode;
1126         ldlm_resource_unlink_lock(lock);
1127
1128         /* If this is a local resource, put it on the appropriate list. */
1129         if (res->lr_namespace->ns_client) {
1130                 if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
1131                         ldlm_resource_add_lock(res, &res->lr_converting, lock);
1132                 } else {
1133                         /* This should never happen, because of the way the
1134                          * server handles conversions. */
1135                         LDLM_ERROR(lock, "Erroneous flags %d on local lock\n",
1136                                    *flags);
1137                         LBUG();
1138
1139                         res->lr_tmp = &rpc_list;
1140                         ldlm_grant_lock(lock, NULL, 0, 0);
1141                         res->lr_tmp = NULL;
1142                         granted = 1;
1143                         /* FIXME: completion handling not with ns_lock held ! */
1144                         if (lock->l_completion_ast)
1145                                 lock->l_completion_ast(lock, 0, NULL);
1146                 }
1147         } else {
1148                 int pflags = 0;
1149                 ldlm_processing_policy policy;
1150                 policy = ldlm_processing_policy_table[res->lr_type];
1151                 res->lr_tmp = &rpc_list;
1152                 rc = policy(lock, &pflags, 0, &err);
1153                 res->lr_tmp = NULL;
1154                 if (rc == LDLM_ITER_STOP) {
1155                         lock->l_req_mode = old_mode;
1156                         ldlm_resource_add_lock(res, &res->lr_granted, lock);
1157                         res = NULL;
1158                 } else {
1159                         *flags |= LDLM_FL_BLOCK_GRANTED;
1160                         granted = 1;
1161                 }
1162         }
1163
1164         l_unlock(&ns->ns_lock);
1165
1166         if (granted)
1167                 ldlm_run_ast_work(ns, &rpc_list);
1168         RETURN(res);
1169 }
1170
1171 void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos)
1172 {
1173         char str[PTL_NALFMT_SIZE];
1174         struct obd_device *obd = NULL;
1175
1176         if (!((portal_debug | D_ERROR) & level))
1177                 return;
1178
1179         if (!lock) {
1180                 CDEBUG(level, "  NULL LDLM lock\n");
1181                 return;
1182         }
1183
1184         CDEBUG(level, "  -- Lock dump: %p/"LPX64" (rc: %d) (pos: %d)\n",
1185                lock, lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
1186                pos);
1187         if (lock->l_conn_export != NULL)
1188                 obd = lock->l_conn_export->exp_obd;
1189         if (lock->l_export && lock->l_export->exp_connection) {
1190                 CDEBUG(level, "  Node: NID %s on %s (rhandle: "LPX64")\n",
1191                        ptlrpc_peernid2str(&lock->l_export->exp_connection->c_peer, str),
1192                        lock->l_export->exp_connection->c_peer.peer_ni->pni_name,
1193                        lock->l_remote_handle.cookie);
1194         } else if (obd == NULL) {
1195                 CDEBUG(level, "  Node: local\n");
1196         } else {
1197                 struct obd_import *imp = obd->u.cli.cl_import;
1198                 CDEBUG(level, "  Node: NID %s on %s (rhandle: "LPX64")\n",
1199                        ptlrpc_peernid2str(&imp->imp_connection->c_peer, str),
1200                        imp->imp_connection->c_peer.peer_ni->pni_name,
1201                        lock->l_remote_handle.cookie);
1202         }
1203         CDEBUG(level, "  Resource: %p ("LPU64"/"LPU64")\n", lock->l_resource,
1204                lock->l_resource->lr_name.name[0],
1205                lock->l_resource->lr_name.name[1]);
1206         CDEBUG(level, "  Req mode: %s, grant mode: %s, rc: %u, read: %d, "
1207                "write: %d\n", ldlm_lockname[lock->l_req_mode],
1208                ldlm_lockname[lock->l_granted_mode],
1209                atomic_read(&lock->l_refc), lock->l_readers, lock->l_writers);
1210         if (lock->l_resource->lr_type == LDLM_EXTENT)
1211                 CDEBUG(level, "  Extent: "LPU64" -> "LPU64
1212                        " (req "LPU64"-"LPU64")\n",
1213                        lock->l_policy_data.l_extent.start,
1214                        lock->l_policy_data.l_extent.end,
1215                        lock->l_req_extent.start, lock->l_req_extent.end);
1216         else if (lock->l_resource->lr_type == LDLM_FLOCK)
1217                 CDEBUG(level, "  Pid: "LPU64" Extent: "LPU64" -> "LPU64"\n",
1218                        lock->l_policy_data.l_flock.pid,
1219                        lock->l_policy_data.l_flock.start,
1220                        lock->l_policy_data.l_flock.end);
1221         else if (lock->l_resource->lr_type == LDLM_IBITS)
1222                 CDEBUG(level, " Bits: "LPX64"\n",
1223                        lock->l_policy_data.l_inodebits.bits);
1224 }
1225
1226 void ldlm_lock_dump_handle(int level, struct lustre_handle *lockh)
1227 {
1228         struct ldlm_lock *lock;
1229
1230         lock = ldlm_handle2lock(lockh);
1231         if (lock == NULL)
1232                 return;
1233
1234         ldlm_lock_dump(D_OTHER, lock, 0);
1235
1236         LDLM_LOCK_PUT(lock);
1237 }