lustre/ldlm/ldlm_resource.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/ldlm/ldlm_resource.c
  37  *
  38  * Author: Phil Schwan <phil@clusterfs.com>
  39  * Author: Peter Braam <braam@clusterfs.com>
  40  */
  41
  42 #define DEBUG_SUBSYSTEM S_LDLM
  43 #ifdef __KERNEL__
  44 # include <lustre_dlm.h>
  45 #else
  46 # include <liblustre.h>
  47 #endif
  48
  49 #include <obd_class.h>
  50 #include "ldlm_internal.h"
  51
  52 cfs_mem_cache_t *ldlm_resource_slab, *ldlm_lock_slab;
  53
  54 cfs_atomic_t ldlm_srv_namespace_nr = CFS_ATOMIC_INIT(0);
  55 cfs_atomic_t ldlm_cli_namespace_nr = CFS_ATOMIC_INIT(0);
  56
  57 cfs_semaphore_t ldlm_srv_namespace_lock;
  58 CFS_LIST_HEAD(ldlm_srv_namespace_list);
  59
  60 cfs_semaphore_t ldlm_cli_namespace_lock;
  61 CFS_LIST_HEAD(ldlm_cli_namespace_list);
  62
  63 cfs_proc_dir_entry_t *ldlm_type_proc_dir = NULL;
  64 cfs_proc_dir_entry_t *ldlm_ns_proc_dir = NULL;
  65 cfs_proc_dir_entry_t *ldlm_svc_proc_dir = NULL;
  66
  67 extern unsigned int ldlm_cancel_unused_locks_before_replay;
  68
  69 #ifdef LPROCFS
  70 static int ldlm_proc_dump_ns(struct file *file, const char *buffer,
  71                              unsigned long count, void *data)
  72 {
  73         ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
  74         ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
  75         RETURN(count);
  76 }
  77
  78 int ldlm_proc_setup(void)
  79 {
  80         int rc;
  81         struct lprocfs_vars list[] = {
  82                 { "dump_namespaces", NULL, ldlm_proc_dump_ns, NULL },
  83                 { "cancel_unused_locks_before_replay",
  84                   lprocfs_rd_uint, lprocfs_wr_uint,
  85                   &ldlm_cancel_unused_locks_before_replay, NULL },
  86                 { NULL }};
  87         ENTRY;
  88         LASSERT(ldlm_ns_proc_dir == NULL);
  89
  90         ldlm_type_proc_dir = lprocfs_register(OBD_LDLM_DEVICENAME,
  91                                               proc_lustre_root,
  92                                               NULL, NULL);
  93         if (IS_ERR(ldlm_type_proc_dir)) {
  94                 CERROR("LProcFS failed in ldlm-init\n");
  95                 rc = PTR_ERR(ldlm_type_proc_dir);
  96                 GOTO(err, rc);
  97         }
  98
  99         ldlm_ns_proc_dir = lprocfs_register("namespaces",
 100                                             ldlm_type_proc_dir,
 101                                             NULL, NULL);
 102         if (IS_ERR(ldlm_ns_proc_dir)) {
 103                 CERROR("LProcFS failed in ldlm-init\n");
 104                 rc = PTR_ERR(ldlm_ns_proc_dir);
 105                 GOTO(err_type, rc);
 106         }
 107
 108         ldlm_svc_proc_dir = lprocfs_register("services",
 109                                             ldlm_type_proc_dir,
 110                                             NULL, NULL);
 111         if (IS_ERR(ldlm_svc_proc_dir)) {
 112                 CERROR("LProcFS failed in ldlm-init\n");
 113                 rc = PTR_ERR(ldlm_svc_proc_dir);
 114                 GOTO(err_ns, rc);
 115         }
 116
 117         rc = lprocfs_add_vars(ldlm_type_proc_dir, list, NULL);
 118
 119         RETURN(0);
 120
 121 err_ns:
 122         lprocfs_remove(&ldlm_ns_proc_dir);
 123 err_type:
 124         lprocfs_remove(&ldlm_type_proc_dir);
 125 err:
 126         ldlm_svc_proc_dir = NULL;
 127         RETURN(rc);
 128 }
 129
 130 void ldlm_proc_cleanup(void)
 131 {
 132         if (ldlm_svc_proc_dir)
 133                 lprocfs_remove(&ldlm_svc_proc_dir);
 134
 135         if (ldlm_ns_proc_dir)
 136                 lprocfs_remove(&ldlm_ns_proc_dir);
 137
 138         if (ldlm_type_proc_dir)
 139                 lprocfs_remove(&ldlm_type_proc_dir);
 140 }
 141
 142 static int lprocfs_rd_lru_size(char *page, char **start, off_t off,
 143                                int count, int *eof, void *data)
 144 {
 145         struct ldlm_namespace *ns = data;
 146         __u32 *nr = &ns->ns_max_unused;
 147
 148         if (ns_connect_lru_resize(ns))
 149                 nr = &ns->ns_nr_unused;
 150         return lprocfs_rd_uint(page, start, off, count, eof, nr);
 151 }
 152
 153 static int lprocfs_wr_lru_size(struct file *file, const char *buffer,
 154                                unsigned long count, void *data)
 155 {
 156         struct ldlm_namespace *ns = data;
 157         char dummy[MAX_STRING_SIZE + 1], *end;
 158         unsigned long tmp;
 159         int lru_resize;
 160
 161         dummy[MAX_STRING_SIZE] = '\0';
 162         if (cfs_copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 163                 return -EFAULT;
 164
 165         if (strncmp(dummy, "clear", 5) == 0) {
 166                 CDEBUG(D_DLMTRACE,
 167                        "dropping all unused locks from namespace %s\n",
 168                        ns->ns_name);
 169                 if (ns_connect_lru_resize(ns)) {
 170                         int canceled, unused  = ns->ns_nr_unused;
 171
 172                         /* Try to cancel all @ns_nr_unused locks. */
 173                         canceled = ldlm_cancel_lru(ns, unused, LDLM_SYNC,
 174                                                    LDLM_CANCEL_PASSED);
 175                         if (canceled < unused) {
 176                                 CDEBUG(D_DLMTRACE,
 177                                        "not all requested locks are canceled, "
 178                                        "requested: %d, canceled: %d\n", unused,
 179                                        canceled);
 180                                 return -EINVAL;
 181                         }
 182                 } else {
 183                         tmp = ns->ns_max_unused;
 184                         ns->ns_max_unused = 0;
 185                         ldlm_cancel_lru(ns, 0, LDLM_SYNC, LDLM_CANCEL_PASSED);
 186                         ns->ns_max_unused = tmp;
 187                 }
 188                 return count;
 189         }
 190
 191         tmp = simple_strtoul(dummy, &end, 0);
 192         if (dummy == end) {
 193                 CERROR("invalid value written\n");
 194                 return -EINVAL;
 195         }
 196         lru_resize = (tmp == 0);
 197
 198         if (ns_connect_lru_resize(ns)) {
 199                 if (!lru_resize)
 200                         ns->ns_max_unused = (unsigned int)tmp;
 201
 202                 if (tmp > ns->ns_nr_unused)
 203                         tmp = ns->ns_nr_unused;
 204                 tmp = ns->ns_nr_unused - tmp;
 205
 206                 CDEBUG(D_DLMTRACE,
 207                        "changing namespace %s unused locks from %u to %u\n",
 208                        ns->ns_name, ns->ns_nr_unused, (unsigned int)tmp);
 209                 ldlm_cancel_lru(ns, tmp, LDLM_ASYNC, LDLM_CANCEL_PASSED);
 210
 211                 if (!lru_resize) {
 212                         CDEBUG(D_DLMTRACE,
 213                                "disable lru_resize for namespace %s\n",
 214                                ns->ns_name);
 215                         ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
 216                 }
 217         } else {
 218                 CDEBUG(D_DLMTRACE,
 219                        "changing namespace %s max_unused from %u to %u\n",
 220                        ns->ns_name, ns->ns_max_unused, (unsigned int)tmp);
 221                 ns->ns_max_unused = (unsigned int)tmp;
 222                 ldlm_cancel_lru(ns, 0, LDLM_ASYNC, LDLM_CANCEL_PASSED);
 223
 224                 /* Make sure that originally lru resize was supported before
 225                  * turning it on here. */
 226                 if (lru_resize &&
 227                     (ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
 228                         CDEBUG(D_DLMTRACE,
 229                                "enable lru_resize for namespace %s\n",
 230                                ns->ns_name);
 231                         ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 232                 }
 233         }
 234
 235         return count;
 236 }
 237
 238 void ldlm_proc_namespace(struct ldlm_namespace *ns)
 239 {
 240         struct lprocfs_vars lock_vars[2];
 241         char lock_name[MAX_STRING_SIZE + 1];
 242
 243         LASSERT(ns != NULL);
 244         LASSERT(ns->ns_name != NULL);
 245
 246         lock_name[MAX_STRING_SIZE] = '\0';
 247
 248         memset(lock_vars, 0, sizeof(lock_vars));
 249         lock_vars[0].name = lock_name;
 250
 251         snprintf(lock_name, MAX_STRING_SIZE, "%s/resource_count", ns->ns_name);
 252         lock_vars[0].data = &ns->ns_refcount;
 253         lock_vars[0].read_fptr = lprocfs_rd_atomic;
 254         lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 255
 256         snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_count", ns->ns_name);
 257         lock_vars[0].data = &ns->ns_locks;
 258         lock_vars[0].read_fptr = lprocfs_rd_atomic;
 259         lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 260
 261         if (ns_is_client(ns)) {
 262                 snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_unused_count",
 263                          ns->ns_name);
 264                 lock_vars[0].data = &ns->ns_nr_unused;
 265                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 266                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 267
 268                 snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_size",
 269                          ns->ns_name);
 270                 lock_vars[0].data = ns;
 271                 lock_vars[0].read_fptr = lprocfs_rd_lru_size;
 272                 lock_vars[0].write_fptr = lprocfs_wr_lru_size;
 273                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 274
 275                 snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_max_age",
 276                          ns->ns_name);
 277                 lock_vars[0].data = &ns->ns_max_age;
 278                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 279                 lock_vars[0].write_fptr = lprocfs_wr_uint;
 280                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 281         } else {
 282                 snprintf(lock_name, MAX_STRING_SIZE, "%s/ctime_age_limit",
 283                          ns->ns_name);
 284                 lock_vars[0].data = &ns->ns_ctime_age_limit;
 285                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 286                 lock_vars[0].write_fptr = lprocfs_wr_uint;
 287                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 288
 289                 snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_timeouts",
 290                          ns->ns_name);
 291                 lock_vars[0].data = &ns->ns_timeouts;
 292                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 293                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 294
 295                 snprintf(lock_name, MAX_STRING_SIZE, "%s/max_nolock_bytes",
 296                          ns->ns_name);
 297                 lock_vars[0].data = &ns->ns_max_nolock_size;
 298                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 299                 lock_vars[0].write_fptr = lprocfs_wr_uint;
 300                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 301
 302                 snprintf(lock_name, MAX_STRING_SIZE, "%s/contention_seconds",
 303                          ns->ns_name);
 304                 lock_vars[0].data = &ns->ns_contention_time;
 305                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 306                 lock_vars[0].write_fptr = lprocfs_wr_uint;
 307                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 308
 309                 snprintf(lock_name, MAX_STRING_SIZE, "%s/contended_locks",
 310                          ns->ns_name);
 311                 lock_vars[0].data = &ns->ns_contended_locks;
 312                 lock_vars[0].read_fptr = lprocfs_rd_uint;
 313                 lock_vars[0].write_fptr = lprocfs_wr_uint;
 314                 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
 315         }
 316 }
 317 #undef MAX_STRING_SIZE
 318 #else
 319 #define ldlm_proc_namespace(ns) do {} while (0)
 320 #endif /* LPROCFS */
 321
 322 struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
 323                                           ldlm_side_t client, ldlm_appetite_t apt)
 324 {
 325         struct ldlm_namespace *ns = NULL;
 326         cfs_list_t *bucket;
 327         int rc, idx, namelen;
 328         ENTRY;
 329
 330         rc = ldlm_get_ref();
 331         if (rc) {
 332                 CERROR("ldlm_get_ref failed: %d\n", rc);
 333                 RETURN(NULL);
 334         }
 335
 336         OBD_ALLOC_PTR(ns);
 337         if (!ns)
 338                 GOTO(out_ref, NULL);
 339
 340         OBD_VMALLOC(ns->ns_hash, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
 341         if (!ns->ns_hash)
 342                 GOTO(out_ns, NULL);
 343
 344         ns->ns_appetite = apt;
 345
 346         LASSERT(obd != NULL);
 347         ns->ns_obd = obd;
 348
 349         namelen = strlen(name);
 350         OBD_ALLOC(ns->ns_name, namelen + 1);
 351         if (!ns->ns_name)
 352                 GOTO(out_hash, NULL);
 353
 354         strcpy(ns->ns_name, name);
 355
 356         CFS_INIT_LIST_HEAD(&ns->ns_root_list);
 357         CFS_INIT_LIST_HEAD(&ns->ns_list_chain);
 358         ns->ns_refcount = 0;
 359         ns->ns_client = client;
 360         cfs_spin_lock_init(&ns->ns_hash_lock);
 361         cfs_atomic_set(&ns->ns_locks, 0);
 362         ns->ns_resources = 0;
 363         cfs_waitq_init(&ns->ns_waitq);
 364         ns->ns_max_nolock_size = NS_DEFAULT_MAX_NOLOCK_BYTES;
 365         ns->ns_contention_time = NS_DEFAULT_CONTENTION_SECONDS;
 366         ns->ns_contended_locks = NS_DEFAULT_CONTENDED_LOCKS;
 367
 368         for (bucket = ns->ns_hash + RES_HASH_SIZE - 1; bucket >= ns->ns_hash;
 369              bucket--)
 370                 CFS_INIT_LIST_HEAD(bucket);
 371
 372         CFS_INIT_LIST_HEAD(&ns->ns_unused_list);
 373         ns->ns_nr_unused = 0;
 374         ns->ns_max_unused = LDLM_DEFAULT_LRU_SIZE;
 375         ns->ns_max_age = LDLM_DEFAULT_MAX_ALIVE;
 376         ns->ns_ctime_age_limit = LDLM_CTIME_AGE_LIMIT;
 377         ns->ns_timeouts = 0;
 378         cfs_spin_lock_init(&ns->ns_unused_lock);
 379         ns->ns_orig_connect_flags = 0;
 380         ns->ns_connect_flags = 0;
 381         ldlm_proc_namespace(ns);
 382
 383         idx = cfs_atomic_read(ldlm_namespace_nr(client));
 384         rc = ldlm_pool_init(&ns->ns_pool, ns, idx, client);
 385         if (rc) {
 386                 CERROR("Can't initialize lock pool, rc %d\n", rc);
 387                 GOTO(out_proc, rc);
 388         }
 389
 390         at_init(&ns->ns_at_estimate, ldlm_enqueue_min, 0);
 391
 392         ldlm_namespace_register(ns, client);
 393         RETURN(ns);
 394 out_proc:
 395         ldlm_namespace_cleanup(ns, 0);
 396         OBD_FREE(ns->ns_name, namelen + 1);
 397 out_hash:
 398         OBD_VFREE(ns->ns_hash, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
 399 out_ns:
 400         OBD_FREE_PTR(ns);
 401 out_ref:
 402         ldlm_put_ref();
 403         RETURN(NULL);
 404 }
 405
 406 extern struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
 407
 408 /* If flags contains FL_LOCAL_ONLY, don't try to tell the server, just cleanup.
 409  * This is currently only used for recovery, and we make certain assumptions
 410  * as a result--notably, that we shouldn't cancel locks with refs. -phil
 411  *
 412  * Called with the ns_lock held. */
 413 static void cleanup_resource(struct ldlm_resource *res, cfs_list_t *q,
 414                              int flags)
 415 {
 416         cfs_list_t *tmp;
 417         int rc = 0, client = ns_is_client(ldlm_res_to_ns(res));
 418         int local_only = (flags & LDLM_FL_LOCAL_ONLY);
 419         ENTRY;
 420
 421
 422         do {
 423                 struct ldlm_lock *lock = NULL;
 424
 425                 /* first, we look for non-cleaned-yet lock
 426                  * all cleaned locks are marked by CLEANED flag */
 427                 lock_res(res);
 428                 cfs_list_for_each(tmp, q) {
 429                         lock = cfs_list_entry(tmp, struct ldlm_lock,
 430                                               l_res_link);
 431                         if (lock->l_flags & LDLM_FL_CLEANED) {
 432                                 lock = NULL;
 433                                 continue;
 434                         }
 435                         LDLM_LOCK_GET(lock);
 436                         lock->l_flags |= LDLM_FL_CLEANED;
 437                         break;
 438                 }
 439
 440                 if (lock == NULL) {
 441                         unlock_res(res);
 442                         break;
 443                 }
 444
 445                 /* Set CBPENDING so nothing in the cancellation path
 446                  * can match this lock */
 447                 lock->l_flags |= LDLM_FL_CBPENDING;
 448                 lock->l_flags |= LDLM_FL_FAILED;
 449                 lock->l_flags |= flags;
 450
 451                 /* ... without sending a CANCEL message for local_only. */
 452                 if (local_only)
 453                         lock->l_flags |= LDLM_FL_LOCAL_ONLY;
 454
 455                 if (local_only && (lock->l_readers || lock->l_writers)) {
 456                         /* This is a little bit gross, but much better than the
 457                          * alternative: pretend that we got a blocking AST from
 458                          * the server, so that when the lock is decref'd, it
 459                          * will go away ... */
 460                         unlock_res(res);
 461                         LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
 462                         if (lock->l_completion_ast)
 463                                 lock->l_completion_ast(lock, 0, NULL);
 464                         LDLM_LOCK_RELEASE(lock);
 465                         continue;
 466                 }
 467
 468                 if (client) {
 469                         struct lustre_handle lockh;
 470
 471                         unlock_res(res);
 472                         ldlm_lock2handle(lock, &lockh);
 473                         rc = ldlm_cli_cancel(&lockh);
 474                         if (rc)
 475                                 CERROR("ldlm_cli_cancel: %d\n", rc);
 476                 } else {
 477                         ldlm_resource_unlink_lock(lock);
 478                         unlock_res(res);
 479                         LDLM_DEBUG(lock, "Freeing a lock still held by a "
 480                                    "client node");
 481                         ldlm_lock_destroy(lock);
 482                 }
 483                 LDLM_LOCK_RELEASE(lock);
 484         } while (1);
 485
 486         EXIT;
 487 }
 488
 489 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags)
 490 {
 491         cfs_list_t *tmp;
 492         int i;
 493
 494         if (ns == NULL) {
 495                 CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
 496                 return ELDLM_OK;
 497         }
 498
 499         for (i = 0; i < RES_HASH_SIZE; i++) {
 500                 cfs_spin_lock(&ns->ns_hash_lock);
 501                 tmp = ns->ns_hash[i].next;
 502                 while (tmp != &(ns->ns_hash[i])) {
 503                         struct ldlm_resource *res;
 504                         res = cfs_list_entry(tmp, struct ldlm_resource,
 505                                              lr_hash);
 506                         ldlm_resource_getref(res);
 507                         cfs_spin_unlock(&ns->ns_hash_lock);
 508                         LDLM_RESOURCE_ADDREF(res);
 509
 510                         cleanup_resource(res, &res->lr_granted, flags);
 511                         cleanup_resource(res, &res->lr_converting, flags);
 512                         cleanup_resource(res, &res->lr_waiting, flags);
 513
 514                         cfs_spin_lock(&ns->ns_hash_lock);
 515                         tmp = tmp->next;
 516
 517                         /* XXX: former stuff caused issues in case of race
 518                          * between ldlm_namespace_cleanup() and lockd() when
 519                          * client gets blocking ast when lock gets distracted by
 520                          * server. This is 1_4 branch solution, let's see how
 521                          * will it behave. */
 522                         LDLM_RESOURCE_DELREF(res);
 523                         if (!ldlm_resource_putref_locked(res)) {
 524                                 CERROR("Namespace %s resource refcount nonzero "
 525                                        "(%d) after lock cleanup; forcing "
 526                                        "cleanup.\n",
 527                                        ns->ns_name,
 528                                        cfs_atomic_read(&res->lr_refcount));
 529                                 CERROR("Resource: %p ("LPU64"/"LPU64"/"LPU64"/"
 530                                        LPU64") (rc: %d)\n", res,
 531                                        res->lr_name.name[0],
 532                                        res->lr_name.name[1],
 533                                        res->lr_name.name[2],
 534                                        res->lr_name.name[3],
 535                                        cfs_atomic_read(&res->lr_refcount));
 536                         }
 537                 }
 538                 cfs_spin_unlock(&ns->ns_hash_lock);
 539         }
 540
 541         return ELDLM_OK;
 542 }
 543
 544 static int __ldlm_namespace_free(struct ldlm_namespace *ns, int force)
 545 {
 546         ENTRY;
 547
 548         /* At shutdown time, don't call the cancellation callback */
 549         ldlm_namespace_cleanup(ns, force ? LDLM_FL_LOCAL_ONLY : 0);
 550
 551         if (ns->ns_refcount > 0) {
 552                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
 553                 int rc;
 554                 CDEBUG(D_DLMTRACE,
 555                        "dlm namespace %s free waiting on refcount %d\n",
 556                        ns->ns_name, ns->ns_refcount);
 557 force_wait:
 558                 if (force)
 559                         lwi = LWI_TIMEOUT(obd_timeout * CFS_HZ / 4, NULL, NULL);
 560
 561                 rc = l_wait_event(ns->ns_waitq,
 562                                   ns->ns_refcount == 0, &lwi);
 563
 564                 /* Forced cleanups should be able to reclaim all references,
 565                  * so it's safe to wait forever... we can't leak locks... */
 566                 if (force && rc == -ETIMEDOUT) {
 567                         LCONSOLE_ERROR("Forced cleanup waiting for %s "
 568                                        "namespace with %d resources in use, "
 569                                        "(rc=%d)\n", ns->ns_name,
 570                                        ns->ns_refcount, rc);
 571                         GOTO(force_wait, rc);
 572                 }
 573
 574                 if (ns->ns_refcount) {
 575                         LCONSOLE_ERROR("Cleanup waiting for %s namespace "
 576                                        "with %d resources in use, (rc=%d)\n",
 577                                        ns->ns_name,
 578                                        ns->ns_refcount, rc);
 579                         RETURN(ELDLM_NAMESPACE_EXISTS);
 580                 }
 581                 CDEBUG(D_DLMTRACE,
 582                        "dlm namespace %s free done waiting\n", ns->ns_name);
 583         }
 584
 585         RETURN(ELDLM_OK);
 586 }
 587
 588 /**
 589  * Performs various cleanups for passed \a ns to make it drop refc and be ready
 590  * for freeing. Waits for refc == 0.
 591  *
 592  * The following is done:
 593  * (0) Unregister \a ns from its list to make inaccessible for potential users
 594  * like pools thread and others;
 595  * (1) Clear all locks in \a ns.
 596  */
 597 void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
 598                                struct obd_import *imp,
 599                                int force)
 600 {
 601         int rc;
 602         ENTRY;
 603         if (!ns) {
 604                 EXIT;
 605                 return;
 606         }
 607
 608
 609         /*
 610          * Can fail with -EINTR when force == 0 in which case try harder.
 611          */
 612         rc = __ldlm_namespace_free(ns, force);
 613         if (rc != ELDLM_OK) {
 614                 if (imp) {
 615                         ptlrpc_disconnect_import(imp, 0);
 616                         ptlrpc_invalidate_import(imp);
 617                 }
 618
 619                 /*
 620                  * With all requests dropped and the import inactive
 621                  * we are gaurenteed all reference will be dropped.
 622                  */
 623                 rc = __ldlm_namespace_free(ns, 1);
 624                 LASSERT(rc == 0);
 625         }
 626         EXIT;
 627 }
 628
 629 /**
 630  * Performs freeing memory structures related to \a ns. This is only done when
 631  * ldlm_namespce_free_prior() successfully removed all resources referencing
 632  * \a ns and its refc == 0.
 633  */
 634 void ldlm_namespace_free_post(struct ldlm_namespace *ns)
 635 {
 636         ENTRY;
 637         if (!ns) {
 638                 EXIT;
 639                 return;
 640         }
 641
 642
 643         /*
 644          * Make sure that nobody can find this ns in its list.
 645          */
 646         ldlm_namespace_unregister(ns, ns->ns_client);
 647         /*
 648          * Fini pool _before_ parent proc dir is removed. This is important as
 649          * ldlm_pool_fini() removes own proc dir which is child to @dir. Removing
 650          * it after @dir may cause oops.
 651          */
 652         ldlm_pool_fini(&ns->ns_pool);
 653
 654 #ifdef LPROCFS
 655         {
 656                 struct proc_dir_entry *dir;
 657                 dir = lprocfs_srch(ldlm_ns_proc_dir, ns->ns_name);
 658                 if (dir == NULL) {
 659                         CERROR("dlm namespace %s has no procfs dir?\n",
 660                                ns->ns_name);
 661                 } else {
 662                         lprocfs_remove(&dir);
 663                 }
 664         }
 665 #endif
 666
 667         OBD_VFREE(ns->ns_hash, sizeof(*ns->ns_hash) * RES_HASH_SIZE);
 668         OBD_FREE(ns->ns_name, strlen(ns->ns_name) + 1);
 669
 670         /*
 671          * Namespace \a ns should be not on list in this time, otherwise this
 672          * will cause issues realted to using freed \a ns in pools thread.
 673          */
 674         LASSERT(cfs_list_empty(&ns->ns_list_chain));
 675         OBD_FREE_PTR(ns);
 676         ldlm_put_ref();
 677         EXIT;
 678 }
 679
 680
 681 /* Cleanup the resource, and free namespace.
 682  * bug 12864:
 683  * Deadlock issue:
 684  * proc1: destroy import
 685  *        class_disconnect_export(grab cl_sem) ->
 686  *              -> ldlm_namespace_free ->
 687  *              -> lprocfs_remove(grab _lprocfs_lock).
 688  * proc2: read proc info
 689  *        lprocfs_fops_read(grab _lprocfs_lock) ->
 690  *              -> osc_rd_active, etc(grab cl_sem).
 691  *
 692  * So that I have to split the ldlm_namespace_free into two parts - the first
 693  * part ldlm_namespace_free_prior is used to cleanup the resource which is
 694  * being used; the 2nd part ldlm_namespace_free_post is used to unregister the
 695  * lprocfs entries, and then free memory. It will be called w/o cli->cl_sem
 696  * held.
 697  */
 698 void ldlm_namespace_free(struct ldlm_namespace *ns,
 699                          struct obd_import *imp,
 700                          int force)
 701 {
 702         ldlm_namespace_free_prior(ns, imp, force);
 703         ldlm_namespace_free_post(ns);
 704 }
 705
 706
 707 void ldlm_namespace_get_locked(struct ldlm_namespace *ns)
 708 {
 709         ns->ns_refcount++;
 710 }
 711
 712 void ldlm_namespace_get(struct ldlm_namespace *ns)
 713 {
 714         cfs_spin_lock(&ns->ns_hash_lock);
 715         ldlm_namespace_get_locked(ns);
 716         cfs_spin_unlock(&ns->ns_hash_lock);
 717 }
 718
 719 void ldlm_namespace_put_locked(struct ldlm_namespace *ns, int wakeup)
 720 {
 721         LASSERT(ns->ns_refcount > 0);
 722         ns->ns_refcount--;
 723         if (ns->ns_refcount == 0 && wakeup)
 724                 cfs_waitq_signal(&ns->ns_waitq);
 725 }
 726
 727 void ldlm_namespace_put(struct ldlm_namespace *ns, int wakeup)
 728 {
 729         cfs_spin_lock(&ns->ns_hash_lock);
 730         ldlm_namespace_put_locked(ns, wakeup);
 731         cfs_spin_unlock(&ns->ns_hash_lock);
 732 }
 733
 734 /* Register @ns in the list of namespaces */
 735 void ldlm_namespace_register(struct ldlm_namespace *ns, ldlm_side_t client)
 736 {
 737         cfs_mutex_down(ldlm_namespace_lock(client));
 738         LASSERT(cfs_list_empty(&ns->ns_list_chain));
 739         cfs_list_add(&ns->ns_list_chain, ldlm_namespace_list(client));
 740         cfs_atomic_inc(ldlm_namespace_nr(client));
 741         cfs_mutex_up(ldlm_namespace_lock(client));
 742 }
 743
 744 /* Unregister @ns from the list of namespaces */
 745 void ldlm_namespace_unregister(struct ldlm_namespace *ns, ldlm_side_t client)
 746 {
 747         cfs_mutex_down(ldlm_namespace_lock(client));
 748         LASSERT(!cfs_list_empty(&ns->ns_list_chain));
 749         /*
 750          * Some asserts and possibly other parts of code still using
 751          * list_empty(&ns->ns_list_chain). This is why it is important
 752          * to use list_del_init() here.
 753          */
 754         cfs_list_del_init(&ns->ns_list_chain);
 755         cfs_atomic_dec(ldlm_namespace_nr(client));
 756         cfs_mutex_up(ldlm_namespace_lock(client));
 757 }
 758
 759 /* Should be called under ldlm_namespace_lock(client) taken */
 760 void ldlm_namespace_move_locked(struct ldlm_namespace *ns, ldlm_side_t client)
 761 {
 762         LASSERT(!cfs_list_empty(&ns->ns_list_chain));
 763         LASSERT_SEM_LOCKED(ldlm_namespace_lock(client));
 764         cfs_list_move_tail(&ns->ns_list_chain, ldlm_namespace_list(client));
 765 }
 766
 767 /* Should be called under ldlm_namespace_lock(client) taken */
 768 struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t client)
 769 {
 770         LASSERT_SEM_LOCKED(ldlm_namespace_lock(client));
 771         LASSERT(!cfs_list_empty(ldlm_namespace_list(client)));
 772         return container_of(ldlm_namespace_list(client)->next,
 773                 struct ldlm_namespace, ns_list_chain);
 774 }
 775 static __u32 ldlm_hash_fn(struct ldlm_resource *parent,
 776                           const struct ldlm_res_id *name)
 777 {
 778         __u32 hash = 0;
 779         int i;
 780
 781         for (i = 0; i < RES_NAME_SIZE; i++)
 782                 hash += name->name[i];
 783
 784         hash += (__u32)((unsigned long)parent >> 4);
 785
 786         return (hash & RES_HASH_MASK);
 787 }
 788
 789 static struct ldlm_resource *ldlm_resource_new(void)
 790 {
 791         struct ldlm_resource *res;
 792         int idx;
 793
 794         OBD_SLAB_ALLOC_PTR_GFP(res, ldlm_resource_slab, CFS_ALLOC_IO);
 795         if (res == NULL)
 796                 return NULL;
 797
 798         memset(res, 0, sizeof(*res));
 799
 800         CFS_INIT_LIST_HEAD(&res->lr_childof);
 801         CFS_INIT_LIST_HEAD(&res->lr_granted);
 802         CFS_INIT_LIST_HEAD(&res->lr_converting);
 803         CFS_INIT_LIST_HEAD(&res->lr_waiting);
 804
 805         /* initialize interval trees for each lock mode*/
 806         for (idx = 0; idx < LCK_MODE_NUM; idx++) {
 807                 res->lr_itree[idx].lit_size = 0;
 808                 res->lr_itree[idx].lit_mode = 1 << idx;
 809                 res->lr_itree[idx].lit_root = NULL;
 810         }
 811
 812         cfs_atomic_set(&res->lr_refcount, 1);
 813         cfs_spin_lock_init(&res->lr_lock);
 814         lu_ref_init(&res->lr_reference);
 815
 816         /* one who creates the resource must unlock
 817          * the semaphore after lvb initialization */
 818         cfs_init_mutex_locked(&res->lr_lvb_sem);
 819
 820         return res;
 821 }
 822
 823 /* must be called with hash lock held */
 824 static struct ldlm_resource *
 825 ldlm_resource_find(struct ldlm_namespace *ns, const struct ldlm_res_id *name,
 826                    __u32 hash)
 827 {
 828         cfs_list_t *bucket, *tmp;
 829         struct ldlm_resource *res;
 830
 831         LASSERT_SPIN_LOCKED(&ns->ns_hash_lock);
 832         bucket = ns->ns_hash + hash;
 833
 834         cfs_list_for_each(tmp, bucket) {
 835                 res = cfs_list_entry(tmp, struct ldlm_resource, lr_hash);
 836                 if (memcmp(&res->lr_name, name, sizeof(res->lr_name)) == 0)
 837                         return res;
 838         }
 839
 840         return NULL;
 841 }
 842
 843 /* Args: locked namespace
 844  * Returns: newly-allocated, referenced, unlocked resource */
 845 static struct ldlm_resource *
 846 ldlm_resource_add(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 847                   const struct ldlm_res_id *name, __u32 hash, ldlm_type_t type)
 848 {
 849         cfs_list_t *bucket;
 850         struct ldlm_resource *res, *old_res;
 851         ENTRY;
 852
 853         LASSERTF(type >= LDLM_MIN_TYPE && type < LDLM_MAX_TYPE,
 854                  "type: %d\n", type);
 855
 856         res = ldlm_resource_new();
 857         if (!res)
 858                 RETURN(NULL);
 859
 860         res->lr_name = *name;
 861         res->lr_namespace = ns;
 862         res->lr_type = type;
 863         res->lr_most_restr = LCK_NL;
 864
 865         cfs_spin_lock(&ns->ns_hash_lock);
 866         old_res = ldlm_resource_find(ns, name, hash);
 867         if (old_res) {
 868                 /* someone won the race and added the resource before */
 869                 ldlm_resource_getref(old_res);
 870                 cfs_spin_unlock(&ns->ns_hash_lock);
 871                 /* clean lu_ref for failed resource */
 872                 lu_ref_fini(&res->lr_reference);
 873                 OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
 874                 /* synchronize WRT resource creation */
 875                 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
 876                         cfs_down(&old_res->lr_lvb_sem);
 877                         cfs_up(&old_res->lr_lvb_sem);
 878                 }
 879                 RETURN(old_res);
 880         }
 881
 882         /* we won! let's add the resource */
 883         bucket = ns->ns_hash + hash;
 884         cfs_list_add(&res->lr_hash, bucket);
 885         ns->ns_resources++;
 886         ldlm_namespace_get_locked(ns);
 887
 888         LASSERT(parent == NULL); /* legacy... */
 889         cfs_list_add(&res->lr_childof, &ns->ns_root_list);
 890         cfs_spin_unlock(&ns->ns_hash_lock);
 891
 892         if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
 893                 int rc;
 894
 895                 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CREATE_RESOURCE, 2);
 896                 rc = ns->ns_lvbo->lvbo_init(res);
 897                 if (rc)
 898                         CERROR("lvbo_init failed for resource "
 899                                LPU64": rc %d\n", name->name[0], rc);
 900                 /* we create resource with locked lr_lvb_sem */
 901                 cfs_up(&res->lr_lvb_sem);
 902         }
 903
 904         RETURN(res);
 905 }
 906
 907 /* Args: unlocked namespace
 908  * Locks: takes and releases ns->ns_lock and res->lr_lock
 909  * Returns: referenced, unlocked ldlm_resource or NULL */
 910 struct ldlm_resource *
 911 ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 912                   const struct ldlm_res_id *name, ldlm_type_t type, int create)
 913 {
 914         __u32 hash = ldlm_hash_fn(parent, name);
 915         struct ldlm_resource *res = NULL;
 916         ENTRY;
 917
 918         LASSERT(ns != NULL);
 919         LASSERT(ns->ns_hash != NULL);
 920         LASSERT(name->name[0] != 0);
 921
 922         cfs_spin_lock(&ns->ns_hash_lock);
 923         res = ldlm_resource_find(ns, name, hash);
 924         if (res) {
 925                 ldlm_resource_getref(res);
 926                 cfs_spin_unlock(&ns->ns_hash_lock);
 927                 /* synchronize WRT resource creation */
 928                 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
 929                         cfs_down(&res->lr_lvb_sem);
 930                         cfs_up(&res->lr_lvb_sem);
 931                 }
 932                 RETURN(res);
 933         }
 934         cfs_spin_unlock(&ns->ns_hash_lock);
 935
 936         if (create == 0)
 937                 RETURN(NULL);
 938
 939         res = ldlm_resource_add(ns, parent, name, hash, type);
 940         RETURN(res);
 941 }
 942
 943 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res)
 944 {
 945         LASSERT(res != NULL);
 946         LASSERT(res != LP_POISON);
 947         cfs_atomic_inc(&res->lr_refcount);
 948         CDEBUG(D_INFO, "getref res: %p count: %d\n", res,
 949                cfs_atomic_read(&res->lr_refcount));
 950         return res;
 951 }
 952
 953 void __ldlm_resource_putref_final(struct ldlm_resource *res)
 954 {
 955         struct ldlm_namespace *ns = ldlm_res_to_ns(res);
 956
 957         LASSERT_SPIN_LOCKED(&ns->ns_hash_lock);
 958
 959         if (!cfs_list_empty(&res->lr_granted)) {
 960                 ldlm_resource_dump(D_ERROR, res);
 961                 LBUG();
 962         }
 963
 964         if (!cfs_list_empty(&res->lr_converting)) {
 965                 ldlm_resource_dump(D_ERROR, res);
 966                 LBUG();
 967         }
 968
 969         if (!cfs_list_empty(&res->lr_waiting)) {
 970                 ldlm_resource_dump(D_ERROR, res);
 971                 LBUG();
 972         }
 973
 974         /* Pass 0 here to not wake ->ns_waitq up yet, we will do it few
 975          * lines below when all children are freed. */
 976         ldlm_namespace_put_locked(ns, 0);
 977         cfs_list_del_init(&res->lr_hash);
 978         cfs_list_del_init(&res->lr_childof);
 979         lu_ref_fini(&res->lr_reference);
 980
 981         ns->ns_resources--;
 982         if (ns->ns_resources == 0)
 983                 cfs_waitq_signal(&ns->ns_waitq);
 984 }
 985
 986 int ldlm_resource_putref_internal(struct ldlm_resource *res, int locked)
 987 {
 988         struct ldlm_namespace *ns = ldlm_res_to_ns(res);
 989         ENTRY;
 990
 991         CDEBUG(D_INFO, "putref res: %p count: %d\n", res,
 992                cfs_atomic_read(&res->lr_refcount) - 1);
 993         LASSERTF(cfs_atomic_read(&res->lr_refcount) > 0, "%d",
 994                  cfs_atomic_read(&res->lr_refcount));
 995         LASSERTF(cfs_atomic_read(&res->lr_refcount) < LI_POISON, "%d",
 996                  cfs_atomic_read(&res->lr_refcount));
 997
 998         if (locked && !cfs_atomic_dec_and_test(&res->lr_refcount))
 999                 RETURN(0);
1000         if (!locked && !cfs_atomic_dec_and_lock(&res->lr_refcount,
1001                                             &ns->ns_hash_lock))
1002                 RETURN(0);
1003
1004         __ldlm_resource_putref_final(res);
1005
1006         if (!locked)
1007                 cfs_spin_unlock(&ns->ns_hash_lock);
1008
1009         if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
1010                 ns->ns_lvbo->lvbo_free(res);
1011
1012         OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
1013
1014         RETURN(1);
1015 }
1016
1017 int ldlm_resource_putref(struct ldlm_resource *res)
1018 {
1019         return ldlm_resource_putref_internal(res, 0);
1020 }
1021
1022 int ldlm_resource_putref_locked(struct ldlm_resource *res)
1023 {
1024         return ldlm_resource_putref_internal(res, 1);
1025 }
1026
1027 void ldlm_resource_add_lock(struct ldlm_resource *res, cfs_list_t *head,
1028                             struct ldlm_lock *lock)
1029 {
1030         check_res_locked(res);
1031
1032         ldlm_resource_dump(D_INFO, res);
1033         CDEBUG(D_OTHER, "About to add this lock:\n");
1034         ldlm_lock_dump(D_OTHER, lock, 0);
1035
1036         if (lock->l_destroyed) {
1037                 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1038                 return;
1039         }
1040
1041         LASSERT(cfs_list_empty(&lock->l_res_link));
1042
1043         cfs_list_add_tail(&lock->l_res_link, head);
1044 }
1045
1046 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
1047                                      struct ldlm_lock *new)
1048 {
1049         struct ldlm_resource *res = original->l_resource;
1050
1051         check_res_locked(res);
1052
1053         ldlm_resource_dump(D_INFO, res);
1054         CDEBUG(D_OTHER, "About to insert this lock after %p:\n", original);
1055         ldlm_lock_dump(D_OTHER, new, 0);
1056
1057         if (new->l_destroyed) {
1058                 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1059                 goto out;
1060         }
1061
1062         LASSERT(cfs_list_empty(&new->l_res_link));
1063
1064         cfs_list_add(&new->l_res_link, &original->l_res_link);
1065  out:;
1066 }
1067
1068 void ldlm_resource_unlink_lock(struct ldlm_lock *lock)
1069 {
1070         int type = lock->l_resource->lr_type;
1071
1072         check_res_locked(lock->l_resource);
1073         if (type == LDLM_IBITS || type == LDLM_PLAIN)
1074                 ldlm_unlink_lock_skiplist(lock);
1075         else if (type == LDLM_EXTENT)
1076                 ldlm_extent_unlink_lock(lock);
1077         cfs_list_del_init(&lock->l_res_link);
1078 }
1079
1080 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc)
1081 {
1082         desc->lr_type = res->lr_type;
1083         desc->lr_name = res->lr_name;
1084 }
1085
1086 void ldlm_dump_all_namespaces(ldlm_side_t client, int level)
1087 {
1088         cfs_list_t *tmp;
1089
1090         if (!((libcfs_debug | D_ERROR) & level))
1091                 return;
1092
1093         cfs_mutex_down(ldlm_namespace_lock(client));
1094
1095         cfs_list_for_each(tmp, ldlm_namespace_list(client)) {
1096                 struct ldlm_namespace *ns;
1097                 ns = cfs_list_entry(tmp, struct ldlm_namespace, ns_list_chain);
1098                 ldlm_namespace_dump(level, ns);
1099         }
1100
1101         cfs_mutex_up(ldlm_namespace_lock(client));
1102 }
1103
1104 void ldlm_namespace_dump(int level, struct ldlm_namespace *ns)
1105 {
1106         cfs_list_t *tmp;
1107
1108         if (!((libcfs_debug | D_ERROR) & level))
1109                 return;
1110
1111         CDEBUG(level, "--- Namespace: %s (rc: %d, side: %s)\n",
1112                ns->ns_name, ns->ns_refcount,
1113                ns_is_client(ns) ? "client" : "server");
1114
1115         if (cfs_time_before(cfs_time_current(), ns->ns_next_dump))
1116                 return;
1117
1118         cfs_spin_lock(&ns->ns_hash_lock);
1119         tmp = ns->ns_root_list.next;
1120         while (tmp != &ns->ns_root_list) {
1121                 struct ldlm_resource *res;
1122                 res = cfs_list_entry(tmp, struct ldlm_resource, lr_childof);
1123
1124                 ldlm_resource_getref(res);
1125                 cfs_spin_unlock(&ns->ns_hash_lock);
1126                 LDLM_RESOURCE_ADDREF(res);
1127
1128                 lock_res(res);
1129                 ldlm_resource_dump(level, res);
1130                 unlock_res(res);
1131
1132                 LDLM_RESOURCE_DELREF(res);
1133                 cfs_spin_lock(&ns->ns_hash_lock);
1134                 tmp = tmp->next;
1135                 ldlm_resource_putref_locked(res);
1136         }
1137         ns->ns_next_dump = cfs_time_shift(10);
1138         cfs_spin_unlock(&ns->ns_hash_lock);
1139 }
1140
1141 void ldlm_resource_dump(int level, struct ldlm_resource *res)
1142 {
1143         cfs_list_t *tmp;
1144         int pos;
1145
1146         CLASSERT(RES_NAME_SIZE == 4);
1147
1148         if (!((libcfs_debug | D_ERROR) & level))
1149                 return;
1150
1151         CDEBUG(level, "--- Resource: %p ("LPU64"/"LPU64"/"LPU64"/"LPU64
1152                ") (rc: %d)\n", res, res->lr_name.name[0], res->lr_name.name[1],
1153                res->lr_name.name[2], res->lr_name.name[3],
1154                cfs_atomic_read(&res->lr_refcount));
1155
1156         if (!cfs_list_empty(&res->lr_granted)) {
1157                 pos = 0;
1158                 CDEBUG(level, "Granted locks:\n");
1159                 cfs_list_for_each(tmp, &res->lr_granted) {
1160                         struct ldlm_lock *lock;
1161                         lock = cfs_list_entry(tmp, struct ldlm_lock,
1162                                               l_res_link);
1163                         ldlm_lock_dump(level, lock, ++pos);
1164                 }
1165         }
1166         if (!cfs_list_empty(&res->lr_converting)) {
1167                 pos = 0;
1168                 CDEBUG(level, "Converting locks:\n");
1169                 cfs_list_for_each(tmp, &res->lr_converting) {
1170                         struct ldlm_lock *lock;
1171                         lock = cfs_list_entry(tmp, struct ldlm_lock,
1172                                               l_res_link);
1173                         ldlm_lock_dump(level, lock, ++pos);
1174                 }
1175         }
1176         if (!cfs_list_empty(&res->lr_waiting)) {
1177                 pos = 0;
1178                 CDEBUG(level, "Waiting locks:\n");
1179                 cfs_list_for_each(tmp, &res->lr_waiting) {
1180                         struct ldlm_lock *lock;
1181                         lock = cfs_list_entry(tmp, struct ldlm_lock,
1182                                               l_res_link);
1183                         ldlm_lock_dump(level, lock, ++pos);
1184                 }
1185         }
1186 }