4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2010, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ldlm/ldlm_resource.c
38 * Author: Phil Schwan <phil@clusterfs.com>
39 * Author: Peter Braam <braam@clusterfs.com>
42 #define DEBUG_SUBSYSTEM S_LDLM
44 # include <lustre_dlm.h>
46 # include <liblustre.h>
49 #include <lustre_fid.h>
50 #include <obd_class.h>
51 #include "ldlm_internal.h"
53 struct kmem_cache *ldlm_resource_slab, *ldlm_lock_slab;
55 int ldlm_srv_namespace_nr = 0;
56 int ldlm_cli_namespace_nr = 0;
58 struct mutex ldlm_srv_namespace_lock;
59 CFS_LIST_HEAD(ldlm_srv_namespace_list);
61 struct mutex ldlm_cli_namespace_lock;
62 /* Client Namespaces that have active resources in them.
63 * Once all resources go away, ldlm_poold moves such namespaces to the
65 CFS_LIST_HEAD(ldlm_cli_active_namespace_list);
66 /* Client namespaces that don't have any locks in them */
67 CFS_LIST_HEAD(ldlm_cli_inactive_namespace_list);
69 cfs_proc_dir_entry_t *ldlm_type_proc_dir = NULL;
70 cfs_proc_dir_entry_t *ldlm_ns_proc_dir = NULL;
71 cfs_proc_dir_entry_t *ldlm_svc_proc_dir = NULL;
73 extern unsigned int ldlm_cancel_unused_locks_before_replay;
75 /* during debug dump certain amount of granted locks for one resource to avoid
77 unsigned int ldlm_dump_granted_max = 256;
80 static int ldlm_proc_dump_ns(struct file *file, const char *buffer,
81 unsigned long count, void *data)
83 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
84 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
88 int ldlm_proc_setup(void)
91 struct lprocfs_vars list[] = {
92 { "dump_namespaces", NULL, ldlm_proc_dump_ns, NULL },
94 lprocfs_rd_uint, lprocfs_wr_uint,
95 &ldlm_dump_granted_max, NULL },
96 { "cancel_unused_locks_before_replay",
97 lprocfs_rd_uint, lprocfs_wr_uint,
98 &ldlm_cancel_unused_locks_before_replay, NULL },
101 LASSERT(ldlm_ns_proc_dir == NULL);
103 ldlm_type_proc_dir = lprocfs_register(OBD_LDLM_DEVICENAME,
106 if (IS_ERR(ldlm_type_proc_dir)) {
107 CERROR("LProcFS failed in ldlm-init\n");
108 rc = PTR_ERR(ldlm_type_proc_dir);
112 ldlm_ns_proc_dir = lprocfs_register("namespaces",
115 if (IS_ERR(ldlm_ns_proc_dir)) {
116 CERROR("LProcFS failed in ldlm-init\n");
117 rc = PTR_ERR(ldlm_ns_proc_dir);
121 ldlm_svc_proc_dir = lprocfs_register("services",
124 if (IS_ERR(ldlm_svc_proc_dir)) {
125 CERROR("LProcFS failed in ldlm-init\n");
126 rc = PTR_ERR(ldlm_svc_proc_dir);
130 rc = lprocfs_add_vars(ldlm_type_proc_dir, list, NULL);
135 lprocfs_remove(&ldlm_ns_proc_dir);
137 lprocfs_remove(&ldlm_type_proc_dir);
139 ldlm_svc_proc_dir = NULL;
143 void ldlm_proc_cleanup(void)
145 if (ldlm_svc_proc_dir)
146 lprocfs_remove(&ldlm_svc_proc_dir);
148 if (ldlm_ns_proc_dir)
149 lprocfs_remove(&ldlm_ns_proc_dir);
151 if (ldlm_type_proc_dir)
152 lprocfs_remove(&ldlm_type_proc_dir);
155 static int lprocfs_rd_ns_resources(char *page, char **start, off_t off,
156 int count, int *eof, void *data)
158 struct ldlm_namespace *ns = data;
163 /* result is not strictly consistant */
164 cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, i)
165 res += cfs_hash_bd_count_get(&bd);
166 return lprocfs_rd_u64(page, start, off, count, eof, &res);
169 static int lprocfs_rd_ns_locks(char *page, char **start, off_t off,
170 int count, int *eof, void *data)
172 struct ldlm_namespace *ns = data;
175 locks = lprocfs_stats_collector(ns->ns_stats, LDLM_NSS_LOCKS,
176 LPROCFS_FIELDS_FLAGS_SUM);
177 return lprocfs_rd_u64(page, start, off, count, eof, &locks);
180 static int lprocfs_rd_lru_size(char *page, char **start, off_t off,
181 int count, int *eof, void *data)
183 struct ldlm_namespace *ns = data;
184 __u32 *nr = &ns->ns_max_unused;
186 if (ns_connect_lru_resize(ns))
187 nr = &ns->ns_nr_unused;
188 return lprocfs_rd_uint(page, start, off, count, eof, nr);
191 static int lprocfs_wr_lru_size(struct file *file, const char *buffer,
192 unsigned long count, void *data)
194 struct ldlm_namespace *ns = data;
195 char dummy[MAX_STRING_SIZE + 1], *end;
199 dummy[MAX_STRING_SIZE] = '\0';
200 if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
203 if (strncmp(dummy, "clear", 5) == 0) {
205 "dropping all unused locks from namespace %s\n",
207 if (ns_connect_lru_resize(ns)) {
208 int canceled, unused = ns->ns_nr_unused;
210 /* Try to cancel all @ns_nr_unused locks. */
211 canceled = ldlm_cancel_lru(ns, unused, 0,
213 if (canceled < unused) {
215 "not all requested locks are canceled, "
216 "requested: %d, canceled: %d\n", unused,
221 tmp = ns->ns_max_unused;
222 ns->ns_max_unused = 0;
223 ldlm_cancel_lru(ns, 0, 0, LDLM_CANCEL_PASSED);
224 ns->ns_max_unused = tmp;
229 tmp = simple_strtoul(dummy, &end, 0);
231 CERROR("invalid value written\n");
234 lru_resize = (tmp == 0);
236 if (ns_connect_lru_resize(ns)) {
238 ns->ns_max_unused = (unsigned int)tmp;
240 if (tmp > ns->ns_nr_unused)
241 tmp = ns->ns_nr_unused;
242 tmp = ns->ns_nr_unused - tmp;
245 "changing namespace %s unused locks from %u to %u\n",
246 ldlm_ns_name(ns), ns->ns_nr_unused,
248 ldlm_cancel_lru(ns, tmp, LCF_ASYNC, LDLM_CANCEL_PASSED);
252 "disable lru_resize for namespace %s\n",
254 ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
258 "changing namespace %s max_unused from %u to %u\n",
259 ldlm_ns_name(ns), ns->ns_max_unused,
261 ns->ns_max_unused = (unsigned int)tmp;
262 ldlm_cancel_lru(ns, 0, LCF_ASYNC, LDLM_CANCEL_PASSED);
264 /* Make sure that LRU resize was originally supported before
265 * turning it on here. */
267 (ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
269 "enable lru_resize for namespace %s\n",
271 ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
278 static int lprocfs_rd_elc(char *page, char **start, off_t off,
279 int count, int *eof, void *data)
281 struct ldlm_namespace *ns = data;
282 unsigned int supp = ns_connect_cancelset(ns);
284 return lprocfs_rd_uint(page, start, off, count, eof, &supp);
287 static int lprocfs_wr_elc(struct file *file, const char *buffer,
288 unsigned long count, void *data)
290 struct ldlm_namespace *ns = data;
291 unsigned int supp = -1;
294 rc = lprocfs_wr_uint(file, buffer, count, &supp);
299 ns->ns_connect_flags &= ~OBD_CONNECT_CANCELSET;
300 else if (ns->ns_orig_connect_flags & OBD_CONNECT_CANCELSET)
301 ns->ns_connect_flags |= OBD_CONNECT_CANCELSET;
305 void ldlm_namespace_proc_unregister(struct ldlm_namespace *ns)
307 struct proc_dir_entry *dir;
309 dir = lprocfs_srch(ldlm_ns_proc_dir, ldlm_ns_name(ns));
311 CERROR("dlm namespace %s has no procfs dir?\n",
314 lprocfs_remove(&dir);
317 if (ns->ns_stats != NULL)
318 lprocfs_free_stats(&ns->ns_stats);
321 int ldlm_namespace_proc_register(struct ldlm_namespace *ns)
323 struct lprocfs_vars lock_vars[2];
324 char lock_name[MAX_STRING_SIZE + 1];
327 LASSERT(ns->ns_rs_hash != NULL);
329 ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
330 if (ns->ns_stats == NULL)
333 lprocfs_counter_init(ns->ns_stats, LDLM_NSS_LOCKS,
334 LPROCFS_CNTR_AVGMINMAX, "locks", "locks");
336 lock_name[MAX_STRING_SIZE] = '\0';
338 memset(lock_vars, 0, sizeof(lock_vars));
339 lock_vars[0].name = lock_name;
341 snprintf(lock_name, MAX_STRING_SIZE, "%s/resource_count",
343 lock_vars[0].data = ns;
344 lock_vars[0].read_fptr = lprocfs_rd_ns_resources;
345 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
347 snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_count",
349 lock_vars[0].data = ns;
350 lock_vars[0].read_fptr = lprocfs_rd_ns_locks;
351 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
353 if (ns_is_client(ns)) {
354 snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_unused_count",
356 lock_vars[0].data = &ns->ns_nr_unused;
357 lock_vars[0].read_fptr = lprocfs_rd_uint;
358 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
360 snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_size",
362 lock_vars[0].data = ns;
363 lock_vars[0].read_fptr = lprocfs_rd_lru_size;
364 lock_vars[0].write_fptr = lprocfs_wr_lru_size;
365 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
367 snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_max_age",
369 lock_vars[0].data = &ns->ns_max_age;
370 lock_vars[0].read_fptr = lprocfs_rd_uint;
371 lock_vars[0].write_fptr = lprocfs_wr_uint;
372 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
374 snprintf(lock_name, MAX_STRING_SIZE, "%s/early_lock_cancel",
376 lock_vars[0].data = ns;
377 lock_vars[0].read_fptr = lprocfs_rd_elc;
378 lock_vars[0].write_fptr = lprocfs_wr_elc;
379 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
381 snprintf(lock_name, MAX_STRING_SIZE, "%s/ctime_age_limit",
383 lock_vars[0].data = &ns->ns_ctime_age_limit;
384 lock_vars[0].read_fptr = lprocfs_rd_uint;
385 lock_vars[0].write_fptr = lprocfs_wr_uint;
386 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
388 snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_timeouts",
390 lock_vars[0].data = &ns->ns_timeouts;
391 lock_vars[0].read_fptr = lprocfs_rd_uint;
392 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
394 snprintf(lock_name, MAX_STRING_SIZE, "%s/max_nolock_bytes",
396 lock_vars[0].data = &ns->ns_max_nolock_size;
397 lock_vars[0].read_fptr = lprocfs_rd_uint;
398 lock_vars[0].write_fptr = lprocfs_wr_uint;
399 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
401 snprintf(lock_name, MAX_STRING_SIZE, "%s/contention_seconds",
403 lock_vars[0].data = &ns->ns_contention_time;
404 lock_vars[0].read_fptr = lprocfs_rd_uint;
405 lock_vars[0].write_fptr = lprocfs_wr_uint;
406 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
408 snprintf(lock_name, MAX_STRING_SIZE, "%s/contended_locks",
410 lock_vars[0].data = &ns->ns_contended_locks;
411 lock_vars[0].read_fptr = lprocfs_rd_uint;
412 lock_vars[0].write_fptr = lprocfs_wr_uint;
413 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
415 snprintf(lock_name, MAX_STRING_SIZE, "%s/max_parallel_ast",
417 lock_vars[0].data = &ns->ns_max_parallel_ast;
418 lock_vars[0].read_fptr = lprocfs_rd_uint;
419 lock_vars[0].write_fptr = lprocfs_wr_uint;
420 lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
424 #undef MAX_STRING_SIZE
427 #define ldlm_namespace_proc_unregister(ns) ({;})
428 #define ldlm_namespace_proc_register(ns) ({0;})
432 static unsigned ldlm_res_hop_hash(cfs_hash_t *hs,
433 const void *key, unsigned mask)
435 const struct ldlm_res_id *id = key;
439 for (i = 0; i < RES_NAME_SIZE; i++)
444 static unsigned ldlm_res_hop_fid_hash(cfs_hash_t *hs,
445 const void *key, unsigned mask)
447 const struct ldlm_res_id *id = key;
452 fid.f_seq = id->name[LUSTRE_RES_ID_SEQ_OFF];
453 fid.f_oid = (__u32)id->name[LUSTRE_RES_ID_VER_OID_OFF];
454 fid.f_ver = (__u32)(id->name[LUSTRE_RES_ID_VER_OID_OFF] >> 32);
456 hash = fid_flatten32(&fid);
457 hash += (hash >> 4) + (hash << 12); /* mixing oid and seq */
458 if (id->name[LUSTRE_RES_ID_HSH_OFF] != 0) {
459 val = id->name[LUSTRE_RES_ID_HSH_OFF];
460 hash += (val >> 5) + (val << 11);
464 hash = cfs_hash_long(hash, hs->hs_bkt_bits);
465 /* give me another random factor */
466 hash -= cfs_hash_long((unsigned long)hs, val % 11 + 3);
468 hash <<= hs->hs_cur_bits - hs->hs_bkt_bits;
469 hash |= ldlm_res_hop_hash(hs, key, CFS_HASH_NBKT(hs) - 1);
474 static void *ldlm_res_hop_key(cfs_hlist_node_t *hnode)
476 struct ldlm_resource *res;
478 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
479 return &res->lr_name;
482 static int ldlm_res_hop_keycmp(const void *key, cfs_hlist_node_t *hnode)
484 struct ldlm_resource *res;
486 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
487 return ldlm_res_eq((const struct ldlm_res_id *)key,
488 (const struct ldlm_res_id *)&res->lr_name);
491 static void *ldlm_res_hop_object(cfs_hlist_node_t *hnode)
493 return cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
496 static void ldlm_res_hop_get_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
498 struct ldlm_resource *res;
500 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
501 ldlm_resource_getref(res);
504 static void ldlm_res_hop_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
506 struct ldlm_resource *res;
508 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
509 /* cfs_hash_for_each_nolock is the only chance we call it */
510 ldlm_resource_putref_locked(res);
513 static void ldlm_res_hop_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
515 struct ldlm_resource *res;
517 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
518 ldlm_resource_putref(res);
521 cfs_hash_ops_t ldlm_ns_hash_ops = {
522 .hs_hash = ldlm_res_hop_hash,
523 .hs_key = ldlm_res_hop_key,
524 .hs_keycmp = ldlm_res_hop_keycmp,
526 .hs_object = ldlm_res_hop_object,
527 .hs_get = ldlm_res_hop_get_locked,
528 .hs_put_locked = ldlm_res_hop_put_locked,
529 .hs_put = ldlm_res_hop_put
532 cfs_hash_ops_t ldlm_ns_fid_hash_ops = {
533 .hs_hash = ldlm_res_hop_fid_hash,
534 .hs_key = ldlm_res_hop_key,
535 .hs_keycmp = ldlm_res_hop_keycmp,
537 .hs_object = ldlm_res_hop_object,
538 .hs_get = ldlm_res_hop_get_locked,
539 .hs_put_locked = ldlm_res_hop_put_locked,
540 .hs_put = ldlm_res_hop_put
544 ldlm_ns_type_t nsd_type;
545 /** hash bucket bits */
546 unsigned nsd_bkt_bits;
548 unsigned nsd_all_bits;
549 /** hash operations */
550 cfs_hash_ops_t *nsd_hops;
551 } ldlm_ns_hash_def_t;
553 ldlm_ns_hash_def_t ldlm_ns_hash_defs[] =
556 .nsd_type = LDLM_NS_TYPE_MDC,
559 .nsd_hops = &ldlm_ns_fid_hash_ops,
562 .nsd_type = LDLM_NS_TYPE_MDT,
565 .nsd_hops = &ldlm_ns_fid_hash_ops,
568 .nsd_type = LDLM_NS_TYPE_OSC,
571 .nsd_hops = &ldlm_ns_hash_ops,
574 .nsd_type = LDLM_NS_TYPE_OST,
577 .nsd_hops = &ldlm_ns_hash_ops,
580 .nsd_type = LDLM_NS_TYPE_MGC,
583 .nsd_hops = &ldlm_ns_hash_ops,
586 .nsd_type = LDLM_NS_TYPE_MGT,
589 .nsd_hops = &ldlm_ns_hash_ops,
592 .nsd_type = LDLM_NS_TYPE_UNKNOWN,
597 * Create and initialize new empty namespace.
599 struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
602 ldlm_ns_type_t ns_type)
604 struct ldlm_namespace *ns = NULL;
605 struct ldlm_ns_bucket *nsb;
606 ldlm_ns_hash_def_t *nsd;
612 LASSERT(obd != NULL);
616 CERROR("ldlm_get_ref failed: %d\n", rc);
620 for (idx = 0;;idx++) {
621 nsd = &ldlm_ns_hash_defs[idx];
622 if (nsd->nsd_type == LDLM_NS_TYPE_UNKNOWN) {
623 CERROR("Unknown type %d for ns %s\n", ns_type, name);
627 if (nsd->nsd_type == ns_type)
635 ns->ns_rs_hash = cfs_hash_create(name,
636 nsd->nsd_all_bits, nsd->nsd_all_bits,
637 nsd->nsd_bkt_bits, sizeof(*nsb),
643 CFS_HASH_SPIN_BKTLOCK |
644 CFS_HASH_NO_ITEMREF);
645 if (ns->ns_rs_hash == NULL)
648 cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, idx) {
649 nsb = cfs_hash_bd_extra_get(ns->ns_rs_hash, &bd);
650 at_init(&nsb->nsb_at_estimate, ldlm_enqueue_min, 0);
651 nsb->nsb_namespace = ns;
655 ns->ns_appetite = apt;
656 ns->ns_client = client;
658 CFS_INIT_LIST_HEAD(&ns->ns_list_chain);
659 CFS_INIT_LIST_HEAD(&ns->ns_unused_list);
660 spin_lock_init(&ns->ns_lock);
661 cfs_atomic_set(&ns->ns_bref, 0);
662 cfs_waitq_init(&ns->ns_waitq);
664 ns->ns_max_nolock_size = NS_DEFAULT_MAX_NOLOCK_BYTES;
665 ns->ns_contention_time = NS_DEFAULT_CONTENTION_SECONDS;
666 ns->ns_contended_locks = NS_DEFAULT_CONTENDED_LOCKS;
668 ns->ns_max_parallel_ast = LDLM_DEFAULT_PARALLEL_AST_LIMIT;
669 ns->ns_nr_unused = 0;
670 ns->ns_max_unused = LDLM_DEFAULT_LRU_SIZE;
671 ns->ns_max_age = LDLM_DEFAULT_MAX_ALIVE;
672 ns->ns_ctime_age_limit = LDLM_CTIME_AGE_LIMIT;
674 ns->ns_orig_connect_flags = 0;
675 ns->ns_connect_flags = 0;
677 rc = ldlm_namespace_proc_register(ns);
679 CERROR("Can't initialize ns proc, rc %d\n", rc);
683 idx = ldlm_namespace_nr_read(client);
684 rc = ldlm_pool_init(&ns->ns_pool, ns, idx, client);
686 CERROR("Can't initialize lock pool, rc %d\n", rc);
690 ldlm_namespace_register(ns, client);
693 ldlm_namespace_proc_unregister(ns);
694 ldlm_namespace_cleanup(ns, 0);
696 cfs_hash_putref(ns->ns_rs_hash);
703 EXPORT_SYMBOL(ldlm_namespace_new);
705 extern struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
708 * Cancel and destroy all locks on a resource.
710 * If flags contains FL_LOCAL_ONLY, don't try to tell the server, just
711 * clean up. This is currently only used for recovery, and we make
712 * certain assumptions as a result--notably, that we shouldn't cancel
715 static void cleanup_resource(struct ldlm_resource *res, cfs_list_t *q,
719 int rc = 0, client = ns_is_client(ldlm_res_to_ns(res));
720 bool local_only = !!(flags & LDLM_FL_LOCAL_ONLY);
723 struct ldlm_lock *lock = NULL;
725 /* First, we look for non-cleaned-yet lock
726 * all cleaned locks are marked by CLEANED flag. */
728 cfs_list_for_each(tmp, q) {
729 lock = cfs_list_entry(tmp, struct ldlm_lock,
731 if (lock->l_flags & LDLM_FL_CLEANED) {
736 lock->l_flags |= LDLM_FL_CLEANED;
745 /* Set CBPENDING so nothing in the cancellation path
746 * can match this lock. */
747 lock->l_flags |= LDLM_FL_CBPENDING;
748 lock->l_flags |= LDLM_FL_FAILED;
749 lock->l_flags |= flags;
751 /* ... without sending a CANCEL message for local_only. */
753 lock->l_flags |= LDLM_FL_LOCAL_ONLY;
755 if (local_only && (lock->l_readers || lock->l_writers)) {
756 /* This is a little bit gross, but much better than the
757 * alternative: pretend that we got a blocking AST from
758 * the server, so that when the lock is decref'd, it
759 * will go away ... */
761 LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
762 if (lock->l_completion_ast)
763 lock->l_completion_ast(lock, 0, NULL);
764 LDLM_LOCK_RELEASE(lock);
769 struct lustre_handle lockh;
772 ldlm_lock2handle(lock, &lockh);
773 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
775 CERROR("ldlm_cli_cancel: %d\n", rc);
777 ldlm_resource_unlink_lock(lock);
779 LDLM_DEBUG(lock, "Freeing a lock still held by a "
781 ldlm_lock_destroy(lock);
783 LDLM_LOCK_RELEASE(lock);
787 static int ldlm_resource_clean(cfs_hash_t *hs, cfs_hash_bd_t *bd,
788 cfs_hlist_node_t *hnode, void *arg)
790 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
791 __u64 flags = *(__u64 *)arg;
793 cleanup_resource(res, &res->lr_granted, flags);
794 cleanup_resource(res, &res->lr_converting, flags);
795 cleanup_resource(res, &res->lr_waiting, flags);
800 static int ldlm_resource_complain(cfs_hash_t *hs, cfs_hash_bd_t *bd,
801 cfs_hlist_node_t *hnode, void *arg)
803 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
806 CERROR("%s: namespace resource "DLDLMRES" (%p) refcount nonzero "
807 "(%d) after lock cleanup; forcing cleanup.\n",
808 ldlm_ns_name(ldlm_res_to_ns(res)), PLDLMRES(res), res,
809 cfs_atomic_read(&res->lr_refcount) - 1);
811 ldlm_resource_dump(D_ERROR, res);
817 * Cancel and destroy all locks in the namespace.
819 * Typically used during evictions when server notified client that it was
820 * evicted and all of its state needs to be destroyed.
821 * Also used during shutdown.
823 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, __u64 flags)
826 CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
830 cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_clean, &flags);
831 cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_complain, NULL);
834 EXPORT_SYMBOL(ldlm_namespace_cleanup);
837 * Attempts to free namespace.
839 * Only used when namespace goes away, like during an unmount.
841 static int __ldlm_namespace_free(struct ldlm_namespace *ns, int force)
845 /* At shutdown time, don't call the cancellation callback */
846 ldlm_namespace_cleanup(ns, force ? LDLM_FL_LOCAL_ONLY : 0);
848 if (cfs_atomic_read(&ns->ns_bref) > 0) {
849 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
852 "dlm namespace %s free waiting on refcount %d\n",
853 ldlm_ns_name(ns), cfs_atomic_read(&ns->ns_bref));
856 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4, NULL, NULL);
858 rc = l_wait_event(ns->ns_waitq,
859 cfs_atomic_read(&ns->ns_bref) == 0, &lwi);
861 /* Forced cleanups should be able to reclaim all references,
862 * so it's safe to wait forever... we can't leak locks... */
863 if (force && rc == -ETIMEDOUT) {
864 LCONSOLE_ERROR("Forced cleanup waiting for %s "
865 "namespace with %d resources in use, "
866 "(rc=%d)\n", ldlm_ns_name(ns),
867 cfs_atomic_read(&ns->ns_bref), rc);
868 GOTO(force_wait, rc);
871 if (cfs_atomic_read(&ns->ns_bref)) {
872 LCONSOLE_ERROR("Cleanup waiting for %s namespace "
873 "with %d resources in use, (rc=%d)\n",
875 cfs_atomic_read(&ns->ns_bref), rc);
876 RETURN(ELDLM_NAMESPACE_EXISTS);
878 CDEBUG(D_DLMTRACE, "dlm namespace %s free done waiting\n",
886 * Performs various cleanups for passed \a ns to make it drop refc and be
887 * ready for freeing. Waits for refc == 0.
889 * The following is done:
890 * (0) Unregister \a ns from its list to make inaccessible for potential
891 * users like pools thread and others;
892 * (1) Clear all locks in \a ns.
894 void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
895 struct obd_import *imp,
905 spin_lock(&ns->ns_lock);
907 spin_unlock(&ns->ns_lock);
910 * Can fail with -EINTR when force == 0 in which case try harder.
912 rc = __ldlm_namespace_free(ns, force);
913 if (rc != ELDLM_OK) {
915 ptlrpc_disconnect_import(imp, 0);
916 ptlrpc_invalidate_import(imp);
920 * With all requests dropped and the import inactive
921 * we are gaurenteed all reference will be dropped.
923 rc = __ldlm_namespace_free(ns, 1);
930 * Performs freeing memory structures related to \a ns. This is only done
931 * when ldlm_namespce_free_prior() successfully removed all resources
932 * referencing \a ns and its refc == 0.
934 void ldlm_namespace_free_post(struct ldlm_namespace *ns)
942 /* Make sure that nobody can find this ns in its list. */
943 ldlm_namespace_unregister(ns, ns->ns_client);
944 /* Fini pool _before_ parent proc dir is removed. This is important as
945 * ldlm_pool_fini() removes own proc dir which is child to @dir.
946 * Removing it after @dir may cause oops. */
947 ldlm_pool_fini(&ns->ns_pool);
949 ldlm_namespace_proc_unregister(ns);
950 cfs_hash_putref(ns->ns_rs_hash);
951 /* Namespace \a ns should be not on list at this time, otherwise
952 * this will cause issues related to using freed \a ns in poold
954 LASSERT(cfs_list_empty(&ns->ns_list_chain));
961 * Cleanup the resource, and free namespace.
964 * proc1: destroy import
965 * class_disconnect_export(grab cl_sem) ->
966 * -> ldlm_namespace_free ->
967 * -> lprocfs_remove(grab _lprocfs_lock).
968 * proc2: read proc info
969 * lprocfs_fops_read(grab _lprocfs_lock) ->
970 * -> osc_rd_active, etc(grab cl_sem).
972 * So that I have to split the ldlm_namespace_free into two parts - the first
973 * part ldlm_namespace_free_prior is used to cleanup the resource which is
974 * being used; the 2nd part ldlm_namespace_free_post is used to unregister the
975 * lprocfs entries, and then free memory. It will be called w/o cli->cl_sem
978 void ldlm_namespace_free(struct ldlm_namespace *ns,
979 struct obd_import *imp,
982 ldlm_namespace_free_prior(ns, imp, force);
983 ldlm_namespace_free_post(ns);
985 EXPORT_SYMBOL(ldlm_namespace_free);
987 void ldlm_namespace_get(struct ldlm_namespace *ns)
989 cfs_atomic_inc(&ns->ns_bref);
991 EXPORT_SYMBOL(ldlm_namespace_get);
993 /* This is only for callers that care about refcount */
994 int ldlm_namespace_get_return(struct ldlm_namespace *ns)
996 return cfs_atomic_inc_return(&ns->ns_bref);
999 void ldlm_namespace_put(struct ldlm_namespace *ns)
1001 if (cfs_atomic_dec_and_lock(&ns->ns_bref, &ns->ns_lock)) {
1002 cfs_waitq_signal(&ns->ns_waitq);
1003 spin_unlock(&ns->ns_lock);
1006 EXPORT_SYMBOL(ldlm_namespace_put);
1008 /** Register \a ns in the list of namespaces */
1009 void ldlm_namespace_register(struct ldlm_namespace *ns, ldlm_side_t client)
1011 mutex_lock(ldlm_namespace_lock(client));
1012 LASSERT(cfs_list_empty(&ns->ns_list_chain));
1013 cfs_list_add(&ns->ns_list_chain, ldlm_namespace_inactive_list(client));
1014 ldlm_namespace_nr_inc(client);
1015 mutex_unlock(ldlm_namespace_lock(client));
1018 /** Unregister \a ns from the list of namespaces. */
1019 void ldlm_namespace_unregister(struct ldlm_namespace *ns, ldlm_side_t client)
1021 mutex_lock(ldlm_namespace_lock(client));
1022 LASSERT(!cfs_list_empty(&ns->ns_list_chain));
1023 /* Some asserts and possibly other parts of the code are still
1024 * using list_empty(&ns->ns_list_chain). This is why it is
1025 * important to use list_del_init() here. */
1026 cfs_list_del_init(&ns->ns_list_chain);
1027 ldlm_namespace_nr_dec(client);
1028 mutex_unlock(ldlm_namespace_lock(client));
1031 /** Should be called with ldlm_namespace_lock(client) taken. */
1032 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *ns,
1035 LASSERT(!cfs_list_empty(&ns->ns_list_chain));
1036 LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
1037 cfs_list_move_tail(&ns->ns_list_chain, ldlm_namespace_list(client));
1040 /** Should be called with ldlm_namespace_lock(client) taken. */
1041 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *ns,
1044 LASSERT(!cfs_list_empty(&ns->ns_list_chain));
1045 LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
1046 cfs_list_move_tail(&ns->ns_list_chain,
1047 ldlm_namespace_inactive_list(client));
1050 /** Should be called with ldlm_namespace_lock(client) taken. */
1051 struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t client)
1053 LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
1054 LASSERT(!cfs_list_empty(ldlm_namespace_list(client)));
1055 return container_of(ldlm_namespace_list(client)->next,
1056 struct ldlm_namespace, ns_list_chain);
1059 /** Create and initialize new resource. */
1060 static struct ldlm_resource *ldlm_resource_new(void)
1062 struct ldlm_resource *res;
1065 OBD_SLAB_ALLOC_PTR_GFP(res, ldlm_resource_slab, __GFP_IO);
1069 CFS_INIT_LIST_HEAD(&res->lr_granted);
1070 CFS_INIT_LIST_HEAD(&res->lr_converting);
1071 CFS_INIT_LIST_HEAD(&res->lr_waiting);
1073 /* Initialize interval trees for each lock mode. */
1074 for (idx = 0; idx < LCK_MODE_NUM; idx++) {
1075 res->lr_itree[idx].lit_size = 0;
1076 res->lr_itree[idx].lit_mode = 1 << idx;
1077 res->lr_itree[idx].lit_root = NULL;
1080 cfs_atomic_set(&res->lr_refcount, 1);
1081 spin_lock_init(&res->lr_lock);
1082 lu_ref_init(&res->lr_reference);
1084 /* The creator of the resource must unlock the mutex after LVB
1085 * initialization. */
1086 mutex_init(&res->lr_lvb_mutex);
1087 mutex_lock(&res->lr_lvb_mutex);
1093 * Return a reference to resource with given name, creating it if necessary.
1094 * Args: namespace with ns_lock unlocked
1095 * Locks: takes and releases NS hash-lock and res->lr_lock
1096 * Returns: referenced, unlocked ldlm_resource or NULL
1098 struct ldlm_resource *
1099 ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
1100 const struct ldlm_res_id *name, ldlm_type_t type, int create)
1102 cfs_hlist_node_t *hnode;
1103 struct ldlm_resource *res;
1106 int ns_refcount = 0;
1108 LASSERT(ns != NULL);
1109 LASSERT(parent == NULL);
1110 LASSERT(ns->ns_rs_hash != NULL);
1111 LASSERT(name->name[0] != 0);
1113 cfs_hash_bd_get_and_lock(ns->ns_rs_hash, (void *)name, &bd, 0);
1114 hnode = cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
1115 if (hnode != NULL) {
1116 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
1117 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
1118 /* Synchronize with regard to resource creation. */
1119 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
1120 mutex_lock(&res->lr_lvb_mutex);
1121 mutex_unlock(&res->lr_lvb_mutex);
1124 if (unlikely(res->lr_lvb_len < 0)) {
1125 ldlm_resource_putref(res);
1131 version = cfs_hash_bd_version_get(&bd);
1132 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
1137 LASSERTF(type >= LDLM_MIN_TYPE && type < LDLM_MAX_TYPE,
1138 "type: %d\n", type);
1139 res = ldlm_resource_new();
1143 res->lr_ns_bucket = cfs_hash_bd_extra_get(ns->ns_rs_hash, &bd);
1144 res->lr_name = *name;
1145 res->lr_type = type;
1146 res->lr_most_restr = LCK_NL;
1148 cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
1149 hnode = (version == cfs_hash_bd_version_get(&bd)) ? NULL :
1150 cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
1152 if (hnode != NULL) {
1153 /* Someone won the race and already added the resource. */
1154 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1155 /* Clean lu_ref for failed resource. */
1156 lu_ref_fini(&res->lr_reference);
1157 /* We have taken lr_lvb_mutex. Drop it. */
1158 mutex_unlock(&res->lr_lvb_mutex);
1159 OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
1161 res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
1162 /* Synchronize with regard to resource creation. */
1163 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
1164 mutex_lock(&res->lr_lvb_mutex);
1165 mutex_unlock(&res->lr_lvb_mutex);
1168 if (unlikely(res->lr_lvb_len < 0)) {
1169 ldlm_resource_putref(res);
1174 /* We won! Let's add the resource. */
1175 cfs_hash_bd_add_locked(ns->ns_rs_hash, &bd, &res->lr_hash);
1176 if (cfs_hash_bd_count_get(&bd) == 1)
1177 ns_refcount = ldlm_namespace_get_return(ns);
1179 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1180 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
1183 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CREATE_RESOURCE, 2);
1184 rc = ns->ns_lvbo->lvbo_init(res);
1186 CERROR("%s: lvbo_init failed for resource "LPX64":"
1187 LPX64": rc = %d\n", ns->ns_obd->obd_name,
1188 name->name[0], name->name[1], rc);
1189 if (res->lr_lvb_data) {
1190 OBD_FREE(res->lr_lvb_data, res->lr_lvb_len);
1191 res->lr_lvb_data = NULL;
1193 res->lr_lvb_len = rc;
1194 mutex_unlock(&res->lr_lvb_mutex);
1195 ldlm_resource_putref(res);
1200 /* We create resource with locked lr_lvb_mutex. */
1201 mutex_unlock(&res->lr_lvb_mutex);
1203 /* Let's see if we happened to be the very first resource in this
1204 * namespace. If so, and this is a client namespace, we need to move
1205 * the namespace into the active namespaces list to be patrolled by
1206 * the ldlm_poold. */
1207 if (ns_is_client(ns) && ns_refcount == 1) {
1208 mutex_lock(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
1209 ldlm_namespace_move_to_active_locked(ns, LDLM_NAMESPACE_CLIENT);
1210 mutex_unlock(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
1215 EXPORT_SYMBOL(ldlm_resource_get);
1217 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res)
1219 LASSERT(res != NULL);
1220 LASSERT(res != LP_POISON);
1221 cfs_atomic_inc(&res->lr_refcount);
1222 CDEBUG(D_INFO, "getref res: %p count: %d\n", res,
1223 cfs_atomic_read(&res->lr_refcount));
1227 static void __ldlm_resource_putref_final(cfs_hash_bd_t *bd,
1228 struct ldlm_resource *res)
1230 struct ldlm_ns_bucket *nsb = res->lr_ns_bucket;
1232 if (!cfs_list_empty(&res->lr_granted)) {
1233 ldlm_resource_dump(D_ERROR, res);
1237 if (!cfs_list_empty(&res->lr_converting)) {
1238 ldlm_resource_dump(D_ERROR, res);
1242 if (!cfs_list_empty(&res->lr_waiting)) {
1243 ldlm_resource_dump(D_ERROR, res);
1247 cfs_hash_bd_del_locked(nsb->nsb_namespace->ns_rs_hash,
1249 lu_ref_fini(&res->lr_reference);
1250 if (cfs_hash_bd_count_get(bd) == 0)
1251 ldlm_namespace_put(nsb->nsb_namespace);
1254 /* Returns 1 if the resource was freed, 0 if it remains. */
1255 int ldlm_resource_putref(struct ldlm_resource *res)
1257 struct ldlm_namespace *ns = ldlm_res_to_ns(res);
1260 LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
1261 CDEBUG(D_INFO, "putref res: %p count: %d\n",
1262 res, cfs_atomic_read(&res->lr_refcount) - 1);
1264 cfs_hash_bd_get(ns->ns_rs_hash, &res->lr_name, &bd);
1265 if (cfs_hash_bd_dec_and_lock(ns->ns_rs_hash, &bd, &res->lr_refcount)) {
1266 __ldlm_resource_putref_final(&bd, res);
1267 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1268 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
1269 ns->ns_lvbo->lvbo_free(res);
1270 OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
1275 EXPORT_SYMBOL(ldlm_resource_putref);
1277 /* Returns 1 if the resource was freed, 0 if it remains. */
1278 int ldlm_resource_putref_locked(struct ldlm_resource *res)
1280 struct ldlm_namespace *ns = ldlm_res_to_ns(res);
1282 LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
1283 CDEBUG(D_INFO, "putref res: %p count: %d\n",
1284 res, cfs_atomic_read(&res->lr_refcount) - 1);
1286 if (cfs_atomic_dec_and_test(&res->lr_refcount)) {
1289 cfs_hash_bd_get(ldlm_res_to_ns(res)->ns_rs_hash,
1290 &res->lr_name, &bd);
1291 __ldlm_resource_putref_final(&bd, res);
1292 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1293 /* NB: ns_rs_hash is created with CFS_HASH_NO_ITEMREF,
1294 * so we should never be here while calling cfs_hash_del,
1295 * cfs_hash_for_each_nolock is the only case we can get
1296 * here, which is safe to release cfs_hash_bd_lock.
1298 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
1299 ns->ns_lvbo->lvbo_free(res);
1300 OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
1302 cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
1309 * Add a lock into a given resource into specified lock list.
1311 void ldlm_resource_add_lock(struct ldlm_resource *res, cfs_list_t *head,
1312 struct ldlm_lock *lock)
1314 check_res_locked(res);
1316 LDLM_DEBUG(lock, "About to add this lock:\n");
1318 if (lock->l_flags & LDLM_FL_DESTROYED) {
1319 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1323 LASSERT(cfs_list_empty(&lock->l_res_link));
1325 cfs_list_add_tail(&lock->l_res_link, head);
1329 * Insert a lock into resource after specified lock.
1331 * Obtain resource description from the lock we are inserting after.
1333 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
1334 struct ldlm_lock *new)
1336 struct ldlm_resource *res = original->l_resource;
1338 check_res_locked(res);
1340 ldlm_resource_dump(D_INFO, res);
1341 LDLM_DEBUG(new, "About to insert this lock after %p:\n", original);
1343 if (new->l_flags & LDLM_FL_DESTROYED) {
1344 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1348 LASSERT(cfs_list_empty(&new->l_res_link));
1350 cfs_list_add(&new->l_res_link, &original->l_res_link);
1354 void ldlm_resource_unlink_lock(struct ldlm_lock *lock)
1356 int type = lock->l_resource->lr_type;
1358 check_res_locked(lock->l_resource);
1359 if (type == LDLM_IBITS || type == LDLM_PLAIN)
1360 ldlm_unlink_lock_skiplist(lock);
1361 else if (type == LDLM_EXTENT)
1362 ldlm_extent_unlink_lock(lock);
1363 cfs_list_del_init(&lock->l_res_link);
1365 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
1367 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc)
1369 desc->lr_type = res->lr_type;
1370 desc->lr_name = res->lr_name;
1374 * Print information about all locks in all namespaces on this node to debug
1377 void ldlm_dump_all_namespaces(ldlm_side_t client, int level)
1381 if (!((libcfs_debug | D_ERROR) & level))
1384 mutex_lock(ldlm_namespace_lock(client));
1386 cfs_list_for_each(tmp, ldlm_namespace_list(client)) {
1387 struct ldlm_namespace *ns;
1388 ns = cfs_list_entry(tmp, struct ldlm_namespace, ns_list_chain);
1389 ldlm_namespace_dump(level, ns);
1392 mutex_unlock(ldlm_namespace_lock(client));
1394 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
1396 static int ldlm_res_hash_dump(cfs_hash_t *hs, cfs_hash_bd_t *bd,
1397 cfs_hlist_node_t *hnode, void *arg)
1399 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1400 int level = (int)(unsigned long)arg;
1403 ldlm_resource_dump(level, res);
1410 * Print information about all locks in this namespace on this node to debug
1413 void ldlm_namespace_dump(int level, struct ldlm_namespace *ns)
1415 if (!((libcfs_debug | D_ERROR) & level))
1418 CDEBUG(level, "--- Namespace: %s (rc: %d, side: %s)\n",
1419 ldlm_ns_name(ns), cfs_atomic_read(&ns->ns_bref),
1420 ns_is_client(ns) ? "client" : "server");
1422 if (cfs_time_before(cfs_time_current(), ns->ns_next_dump))
1425 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1427 (void *)(unsigned long)level);
1428 spin_lock(&ns->ns_lock);
1429 ns->ns_next_dump = cfs_time_shift(10);
1430 spin_unlock(&ns->ns_lock);
1432 EXPORT_SYMBOL(ldlm_namespace_dump);
1435 * Print information about all locks in this resource to debug log.
1437 void ldlm_resource_dump(int level, struct ldlm_resource *res)
1439 struct ldlm_lock *lock;
1440 unsigned int granted = 0;
1442 CLASSERT(RES_NAME_SIZE == 4);
1444 if (!((libcfs_debug | D_ERROR) & level))
1447 CDEBUG(level, "--- Resource: "DLDLMRES" (%p) refcount = %d\n",
1448 PLDLMRES(res), res, cfs_atomic_read(&res->lr_refcount));
1450 if (!cfs_list_empty(&res->lr_granted)) {
1451 CDEBUG(level, "Granted locks (in reverse order):\n");
1452 cfs_list_for_each_entry_reverse(lock, &res->lr_granted,
1454 LDLM_DEBUG_LIMIT(level, lock, "###");
1455 if (!(level & D_CANTMASK) &&
1456 ++granted > ldlm_dump_granted_max) {
1457 CDEBUG(level, "only dump %d granted locks to "
1458 "avoid DDOS.\n", granted);
1463 if (!cfs_list_empty(&res->lr_converting)) {
1464 CDEBUG(level, "Converting locks:\n");
1465 cfs_list_for_each_entry(lock, &res->lr_converting, l_res_link)
1466 LDLM_DEBUG_LIMIT(level, lock, "###");
1468 if (!cfs_list_empty(&res->lr_waiting)) {
1469 CDEBUG(level, "Waiting locks:\n");
1470 cfs_list_for_each_entry(lock, &res->lr_waiting, l_res_link)
1471 LDLM_DEBUG_LIMIT(level, lock, "###");