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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2010, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/ldlm/ldlm_resource.c
34 * Author: Phil Schwan <phil@clusterfs.com>
35 * Author: Peter Braam <braam@clusterfs.com>
38 #define DEBUG_SUBSYSTEM S_LDLM
39 #include <lustre_dlm.h>
40 #include <lustre_fid.h>
41 #include <obd_class.h>
42 #include "ldlm_internal.h"
44 struct kmem_cache *ldlm_resource_slab, *ldlm_lock_slab;
45 struct kmem_cache *ldlm_interval_tree_slab;
46 struct kmem_cache *ldlm_inodebits_slab;
48 int ldlm_srv_namespace_nr = 0;
49 int ldlm_cli_namespace_nr = 0;
51 DEFINE_MUTEX(ldlm_srv_namespace_lock);
52 LIST_HEAD(ldlm_srv_namespace_list);
54 DEFINE_MUTEX(ldlm_cli_namespace_lock);
55 /* Client Namespaces that have active resources in them.
56 * Once all resources go away, ldlm_poold moves such namespaces to the
58 LIST_HEAD(ldlm_cli_active_namespace_list);
59 /* Client namespaces that don't have any locks in them */
60 LIST_HEAD(ldlm_cli_inactive_namespace_list);
62 static struct dentry *ldlm_debugfs_dir;
63 static struct dentry *ldlm_ns_debugfs_dir;
64 struct dentry *ldlm_svc_debugfs_dir;
66 /* during debug dump certain amount of granted locks for one resource to avoid
68 static unsigned int ldlm_dump_granted_max = 256;
70 static ssize_t ldebugfs_dump_ns_seq_write(struct file *file,
71 const char __user *buffer,
72 size_t count, loff_t *off)
74 ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
75 ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
79 LDEBUGFS_FOPS_WR_ONLY(ldlm, dump_ns);
81 static int ldlm_rw_uint_seq_show(struct seq_file *m, void *v)
83 seq_printf(m, "%u\n", *(unsigned int *)m->private);
88 ldlm_rw_uint_seq_write(struct file *file, const char __user *buffer,
89 size_t count, loff_t *off)
91 struct seq_file *seq = file->private_data;
96 return kstrtouint_from_user(buffer, count, 0,
97 (unsigned int *)seq->private);
100 LDEBUGFS_SEQ_FOPS(ldlm_rw_uint);
102 #ifdef HAVE_SERVER_SUPPORT
104 static int seq_watermark_show(struct seq_file *m, void *data)
106 seq_printf(m, "%llu\n", *(__u64 *)m->private);
110 static ssize_t seq_watermark_write(struct file *file,
111 const char __user *buffer, size_t count,
114 struct seq_file *m = file->private_data;
117 __u64 *data = m->private;
118 bool wm_low = (data == &ldlm_reclaim_threshold_mb) ? true : false;
119 char kernbuf[22] = "";
122 if (count >= sizeof(kernbuf))
125 if (copy_from_user(kernbuf, buffer, count))
129 rc = sysfs_memparse(kernbuf, count, &value, "MiB");
131 CERROR("Failed to set %s, rc = %d.\n",
132 wm_low ? "lock_reclaim_threshold_mb" : "lock_limit_mb",
135 } else if (value != 0 && value < (1 << 20)) {
136 CERROR("%s should be greater than 1MB.\n",
137 wm_low ? "lock_reclaim_threshold_mb" : "lock_limit_mb");
140 watermark = value >> 20;
143 if (ldlm_lock_limit_mb != 0 && watermark > ldlm_lock_limit_mb) {
144 CERROR("lock_reclaim_threshold_mb must be smaller than "
150 if (watermark != 0) {
152 do_div(watermark, sizeof(struct ldlm_lock));
154 ldlm_reclaim_threshold = watermark;
156 if (ldlm_reclaim_threshold_mb != 0 &&
157 watermark < ldlm_reclaim_threshold_mb) {
158 CERROR("lock_limit_mb must be greater than "
159 "lock_reclaim_threshold_mb.\n");
164 if (watermark != 0) {
166 do_div(watermark, sizeof(struct ldlm_lock));
168 ldlm_lock_limit = watermark;
174 static int seq_watermark_open(struct inode *inode, struct file *file)
176 return single_open(file, seq_watermark_show, inode->i_private);
179 static const struct file_operations ldlm_watermark_fops = {
180 .owner = THIS_MODULE,
181 .open = seq_watermark_open,
183 .write = seq_watermark_write,
185 .release = lprocfs_single_release,
188 static int seq_granted_show(struct seq_file *m, void *data)
190 seq_printf(m, "%llu\n", percpu_counter_sum_positive(
191 (struct percpu_counter *)m->private));
195 static int seq_granted_open(struct inode *inode, struct file *file)
197 return single_open(file, seq_granted_show, inode->i_private);
200 static const struct file_operations ldlm_granted_fops = {
201 .owner = THIS_MODULE,
202 .open = seq_granted_open,
205 .release = seq_release,
208 #endif /* HAVE_SERVER_SUPPORT */
210 static struct ldebugfs_vars ldlm_debugfs_list[] = {
211 { .name = "dump_namespaces",
212 .fops = &ldlm_dump_ns_fops,
214 { .name = "dump_granted_max",
215 .fops = &ldlm_rw_uint_fops,
216 .data = &ldlm_dump_granted_max },
217 #ifdef HAVE_SERVER_SUPPORT
218 { .name = "lock_reclaim_threshold_mb",
219 .fops = &ldlm_watermark_fops,
220 .data = &ldlm_reclaim_threshold_mb },
221 { .name = "lock_limit_mb",
222 .fops = &ldlm_watermark_fops,
223 .data = &ldlm_lock_limit_mb },
224 { .name = "lock_granted_count",
225 .fops = &ldlm_granted_fops,
226 .data = &ldlm_granted_total },
231 int ldlm_debugfs_setup(void)
234 ldlm_debugfs_dir = debugfs_create_dir(OBD_LDLM_DEVICENAME,
235 debugfs_lustre_root);
236 ldlm_ns_debugfs_dir = debugfs_create_dir("namespaces",
238 ldlm_svc_debugfs_dir = debugfs_create_dir("services",
241 ldebugfs_add_vars(ldlm_debugfs_dir, ldlm_debugfs_list, NULL);
246 void ldlm_debugfs_cleanup(void)
248 debugfs_remove_recursive(ldlm_debugfs_dir);
250 ldlm_svc_debugfs_dir = NULL;
251 ldlm_ns_debugfs_dir = NULL;
252 ldlm_debugfs_dir = NULL;
255 static ssize_t resource_count_show(struct kobject *kobj, struct attribute *attr,
258 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
263 /* result is not strictly consistant */
264 for (i = 0; i < (1 << ns->ns_bucket_bits); i++)
265 res += atomic_read(&ns->ns_rs_buckets[i].nsb_count);
266 return sprintf(buf, "%lld\n", res);
268 LUSTRE_RO_ATTR(resource_count);
270 static ssize_t lock_count_show(struct kobject *kobj, struct attribute *attr,
273 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
277 locks = lprocfs_stats_collector(ns->ns_stats, LDLM_NSS_LOCKS,
278 LPROCFS_FIELDS_FLAGS_SUM);
279 return sprintf(buf, "%lld\n", locks);
281 LUSTRE_RO_ATTR(lock_count);
283 static ssize_t lock_unused_count_show(struct kobject *kobj,
284 struct attribute *attr,
287 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
290 return sprintf(buf, "%d\n", ns->ns_nr_unused);
292 LUSTRE_RO_ATTR(lock_unused_count);
294 static ssize_t lru_size_show(struct kobject *kobj, struct attribute *attr,
297 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
299 __u32 *nr = &ns->ns_max_unused;
301 if (ns_connect_lru_resize(ns))
302 nr = &ns->ns_nr_unused;
303 return sprintf(buf, "%u\n", *nr);
306 static ssize_t lru_size_store(struct kobject *kobj, struct attribute *attr,
307 const char *buffer, size_t count)
309 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
315 if (strncmp(buffer, "clear", 5) == 0) {
317 "dropping all unused locks from namespace %s\n",
319 /* Try to cancel all @ns_nr_unused locks. */
320 ldlm_cancel_lru(ns, INT_MAX, 0, LDLM_LRU_FLAG_CLEANUP);
324 err = kstrtoul(buffer, 10, &tmp);
326 CERROR("lru_size: invalid value written\n");
329 lru_resize = (tmp == 0);
331 if (ns_connect_lru_resize(ns)) {
333 ns->ns_max_unused = (unsigned int)tmp;
335 if (tmp > ns->ns_nr_unused)
336 tmp = ns->ns_nr_unused;
337 tmp = ns->ns_nr_unused - tmp;
340 "changing namespace %s unused locks from %u to %u\n",
341 ldlm_ns_name(ns), ns->ns_nr_unused,
346 "disable lru_resize for namespace %s\n",
348 ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
350 ldlm_cancel_lru(ns, tmp, LCF_ASYNC, 0);
353 "changing namespace %s max_unused from %u to %u\n",
354 ldlm_ns_name(ns), ns->ns_max_unused,
357 /* Make sure that LRU resize was originally supported before
358 * turning it on here.
361 (ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
363 "enable lru_resize for namespace %s\n",
365 ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
367 ns->ns_max_unused = (unsigned int)tmp;
368 ldlm_cancel_lru(ns, 0, LCF_ASYNC, 0);
373 LUSTRE_RW_ATTR(lru_size);
375 static ssize_t lru_cancel_batch_show(struct kobject *kobj,
376 struct attribute *attr, char *buf)
378 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
381 return snprintf(buf, sizeof(buf) - 1, "%u\n", ns->ns_cancel_batch);
384 static ssize_t lru_cancel_batch_store(struct kobject *kobj,
385 struct attribute *attr,
386 const char *buffer, size_t count)
388 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
392 if (kstrtoul(buffer, 10, &tmp))
395 ns->ns_cancel_batch = (unsigned int)tmp;
399 LUSTRE_RW_ATTR(lru_cancel_batch);
401 static ssize_t lru_max_age_show(struct kobject *kobj, struct attribute *attr,
404 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
407 return sprintf(buf, "%lld\n", ktime_to_ms(ns->ns_max_age));
410 static ssize_t lru_max_age_store(struct kobject *kobj, struct attribute *attr,
411 const char *buffer, size_t count)
413 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
415 int scale = NSEC_PER_MSEC;
416 unsigned long long tmp;
419 /* Did the user ask in seconds or milliseconds. Default is in ms */
420 buf = strstr(buffer, "ms");
422 buf = strchr(buffer, 's');
424 scale = NSEC_PER_SEC;
430 if (kstrtoull(buffer, 10, &tmp))
433 ns->ns_max_age = ktime_set(0, tmp * scale);
437 LUSTRE_RW_ATTR(lru_max_age);
439 static ssize_t early_lock_cancel_show(struct kobject *kobj,
440 struct attribute *attr,
443 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
446 return sprintf(buf, "%d\n", ns_connect_cancelset(ns));
449 static ssize_t early_lock_cancel_store(struct kobject *kobj,
450 struct attribute *attr,
454 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
456 unsigned long supp = -1;
459 rc = kstrtoul(buffer, 10, &supp);
464 ns->ns_connect_flags &= ~OBD_CONNECT_CANCELSET;
465 else if (ns->ns_orig_connect_flags & OBD_CONNECT_CANCELSET)
466 ns->ns_connect_flags |= OBD_CONNECT_CANCELSET;
469 LUSTRE_RW_ATTR(early_lock_cancel);
471 static ssize_t dirty_age_limit_show(struct kobject *kobj,
472 struct attribute *attr, char *buf)
474 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
477 return snprintf(buf, PAGE_SIZE, "%llu\n",
478 ktime_divns(ns->ns_dirty_age_limit, NSEC_PER_SEC));
481 static ssize_t dirty_age_limit_store(struct kobject *kobj,
482 struct attribute *attr,
483 const char *buffer, size_t count)
485 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
487 unsigned long long tmp;
489 if (kstrtoull(buffer, 10, &tmp))
492 ns->ns_dirty_age_limit = ktime_set(tmp, 0);
496 LUSTRE_RW_ATTR(dirty_age_limit);
498 #ifdef HAVE_SERVER_SUPPORT
499 static ssize_t ctime_age_limit_show(struct kobject *kobj,
500 struct attribute *attr, char *buf)
502 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
505 return snprintf(buf, PAGE_SIZE, "%u\n", ns->ns_ctime_age_limit);
508 static ssize_t ctime_age_limit_store(struct kobject *kobj,
509 struct attribute *attr,
510 const char *buffer, size_t count)
512 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
516 if (kstrtoul(buffer, 10, &tmp))
519 ns->ns_ctime_age_limit = tmp;
523 LUSTRE_RW_ATTR(ctime_age_limit);
525 static ssize_t lock_timeouts_show(struct kobject *kobj, struct attribute *attr,
528 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
531 return sprintf(buf, "%d\n", ns->ns_timeouts);
533 LUSTRE_RO_ATTR(lock_timeouts);
535 static ssize_t max_nolock_bytes_show(struct kobject *kobj,
536 struct attribute *attr, char *buf)
538 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
541 return sprintf(buf, "%u\n", ns->ns_max_nolock_size);
544 static ssize_t max_nolock_bytes_store(struct kobject *kobj,
545 struct attribute *attr,
546 const char *buffer, size_t count)
548 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
553 err = kstrtoul(buffer, 10, &tmp);
557 ns->ns_max_nolock_size = tmp;
561 LUSTRE_RW_ATTR(max_nolock_bytes);
563 static ssize_t contention_seconds_show(struct kobject *kobj,
564 struct attribute *attr, char *buf)
566 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
569 return scnprintf(buf, PAGE_SIZE, "%d\n", ns->ns_contention_time);
572 static ssize_t contention_seconds_store(struct kobject *kobj,
573 struct attribute *attr,
574 const char *buffer, size_t count)
576 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
580 if (kstrtouint(buffer, 10, &tmp))
583 ns->ns_contention_time = tmp;
587 LUSTRE_RW_ATTR(contention_seconds);
589 static ssize_t contended_locks_show(struct kobject *kobj,
590 struct attribute *attr, char *buf)
592 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
595 return sprintf(buf, "%u\n", ns->ns_contended_locks);
598 static ssize_t contended_locks_store(struct kobject *kobj,
599 struct attribute *attr,
600 const char *buffer, size_t count)
602 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
607 err = kstrtoul(buffer, 10, &tmp);
611 ns->ns_contended_locks = tmp;
615 LUSTRE_RW_ATTR(contended_locks);
617 static ssize_t max_parallel_ast_show(struct kobject *kobj,
618 struct attribute *attr, char *buf)
620 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
623 return sprintf(buf, "%u\n", ns->ns_max_parallel_ast);
626 static ssize_t max_parallel_ast_store(struct kobject *kobj,
627 struct attribute *attr,
628 const char *buffer, size_t count)
630 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
635 err = kstrtoul(buffer, 10, &tmp);
639 ns->ns_max_parallel_ast = tmp;
643 LUSTRE_RW_ATTR(max_parallel_ast);
645 #endif /* HAVE_SERVER_SUPPORT */
647 /* These are for namespaces in /sys/fs/lustre/ldlm/namespaces/ */
648 static struct attribute *ldlm_ns_attrs[] = {
649 &lustre_attr_resource_count.attr,
650 &lustre_attr_lock_count.attr,
651 &lustre_attr_lock_unused_count.attr,
652 &lustre_attr_lru_size.attr,
653 &lustre_attr_lru_cancel_batch.attr,
654 &lustre_attr_lru_max_age.attr,
655 &lustre_attr_early_lock_cancel.attr,
656 &lustre_attr_dirty_age_limit.attr,
657 #ifdef HAVE_SERVER_SUPPORT
658 &lustre_attr_ctime_age_limit.attr,
659 &lustre_attr_lock_timeouts.attr,
660 &lustre_attr_max_nolock_bytes.attr,
661 &lustre_attr_contention_seconds.attr,
662 &lustre_attr_contended_locks.attr,
663 &lustre_attr_max_parallel_ast.attr,
668 static void ldlm_ns_release(struct kobject *kobj)
670 struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
672 complete(&ns->ns_kobj_unregister);
675 static struct kobj_type ldlm_ns_ktype = {
676 .default_attrs = ldlm_ns_attrs,
677 .sysfs_ops = &lustre_sysfs_ops,
678 .release = ldlm_ns_release,
681 static void ldlm_namespace_debugfs_unregister(struct ldlm_namespace *ns)
683 if (IS_ERR_OR_NULL(ns->ns_debugfs_entry))
684 CERROR("dlm namespace %s has no procfs dir?\n",
687 debugfs_remove_recursive(ns->ns_debugfs_entry);
689 if (ns->ns_stats != NULL)
690 lprocfs_free_stats(&ns->ns_stats);
693 void ldlm_namespace_sysfs_unregister(struct ldlm_namespace *ns)
695 kobject_put(&ns->ns_kobj);
696 wait_for_completion(&ns->ns_kobj_unregister);
699 int ldlm_namespace_sysfs_register(struct ldlm_namespace *ns)
703 ns->ns_kobj.kset = ldlm_ns_kset;
704 init_completion(&ns->ns_kobj_unregister);
705 err = kobject_init_and_add(&ns->ns_kobj, &ldlm_ns_ktype, NULL,
706 "%s", ldlm_ns_name(ns));
708 ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
710 kobject_put(&ns->ns_kobj);
714 lprocfs_counter_init(ns->ns_stats, LDLM_NSS_LOCKS,
715 LPROCFS_CNTR_AVGMINMAX, "locks", "locks");
720 static int ldlm_namespace_debugfs_register(struct ldlm_namespace *ns)
722 struct dentry *ns_entry;
724 if (!IS_ERR_OR_NULL(ns->ns_debugfs_entry)) {
725 ns_entry = ns->ns_debugfs_entry;
727 ns_entry = debugfs_create_dir(ldlm_ns_name(ns),
728 ldlm_ns_debugfs_dir);
731 ns->ns_debugfs_entry = ns_entry;
736 #undef MAX_STRING_SIZE
738 static unsigned ldlm_res_hop_hash(struct cfs_hash *hs,
739 const void *key, unsigned int mask)
741 const struct ldlm_res_id *id = key;
742 unsigned int val = 0;
745 for (i = 0; i < RES_NAME_SIZE; i++)
750 static unsigned int ldlm_res_hop_fid_hash(const struct ldlm_res_id *id, unsigned int bits)
756 fid.f_seq = id->name[LUSTRE_RES_ID_SEQ_OFF];
757 fid.f_oid = (__u32)id->name[LUSTRE_RES_ID_VER_OID_OFF];
758 fid.f_ver = (__u32)(id->name[LUSTRE_RES_ID_VER_OID_OFF] >> 32);
760 hash = fid_flatten32(&fid);
761 hash += (hash >> 4) + (hash << 12); /* mixing oid and seq */
762 if (id->name[LUSTRE_RES_ID_HSH_OFF] != 0) {
763 val = id->name[LUSTRE_RES_ID_HSH_OFF];
767 hash += (val >> 5) + (val << 11);
768 return cfs_hash_32(hash, bits);
771 static void *ldlm_res_hop_key(struct hlist_node *hnode)
773 struct ldlm_resource *res;
775 res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
776 return &res->lr_name;
779 static int ldlm_res_hop_keycmp(const void *key, struct hlist_node *hnode)
781 struct ldlm_resource *res;
783 res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
784 return ldlm_res_eq((const struct ldlm_res_id *)key,
785 (const struct ldlm_res_id *)&res->lr_name);
788 static void *ldlm_res_hop_object(struct hlist_node *hnode)
790 return hlist_entry(hnode, struct ldlm_resource, lr_hash);
794 ldlm_res_hop_get_locked(struct cfs_hash *hs, struct hlist_node *hnode)
796 struct ldlm_resource *res;
798 res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
799 ldlm_resource_getref(res);
802 static void ldlm_res_hop_put(struct cfs_hash *hs, struct hlist_node *hnode)
804 struct ldlm_resource *res;
806 res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
807 ldlm_resource_putref(res);
810 static struct cfs_hash_ops ldlm_ns_hash_ops = {
811 .hs_hash = ldlm_res_hop_hash,
812 .hs_key = ldlm_res_hop_key,
813 .hs_keycmp = ldlm_res_hop_keycmp,
815 .hs_object = ldlm_res_hop_object,
816 .hs_get = ldlm_res_hop_get_locked,
817 .hs_put = ldlm_res_hop_put
821 /** hash bucket bits */
822 unsigned nsd_bkt_bits;
824 unsigned nsd_all_bits;
825 } ldlm_ns_hash_defs[] = {
826 [LDLM_NS_TYPE_MDC] = {
830 [LDLM_NS_TYPE_MDT] = {
834 [LDLM_NS_TYPE_OSC] = {
838 [LDLM_NS_TYPE_OST] = {
842 [LDLM_NS_TYPE_MGC] = {
846 [LDLM_NS_TYPE_MGT] = {
853 * Create and initialize new empty namespace.
855 struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
856 enum ldlm_side client,
857 enum ldlm_appetite apt,
858 enum ldlm_ns_type ns_type)
860 struct ldlm_namespace *ns = NULL;
865 LASSERT(obd != NULL);
869 CERROR("ldlm_get_ref failed: %d\n", rc);
873 if (ns_type >= ARRAY_SIZE(ldlm_ns_hash_defs) ||
874 ldlm_ns_hash_defs[ns_type].nsd_bkt_bits == 0) {
875 CERROR("Unknown type %d for ns %s\n", ns_type, name);
883 ns->ns_rs_hash = cfs_hash_create(name,
884 ldlm_ns_hash_defs[ns_type].nsd_all_bits,
885 ldlm_ns_hash_defs[ns_type].nsd_all_bits,
886 ldlm_ns_hash_defs[ns_type].nsd_bkt_bits,
893 CFS_HASH_SPIN_BKTLOCK |
894 CFS_HASH_NO_ITEMREF);
895 if (ns->ns_rs_hash == NULL)
898 ns->ns_bucket_bits = ldlm_ns_hash_defs[ns_type].nsd_all_bits -
899 ldlm_ns_hash_defs[ns_type].nsd_bkt_bits;
901 OBD_ALLOC_PTR_ARRAY_LARGE(ns->ns_rs_buckets, 1 << ns->ns_bucket_bits);
902 if (!ns->ns_rs_buckets)
905 for (idx = 0; idx < (1 << ns->ns_bucket_bits); idx++) {
906 struct ldlm_ns_bucket *nsb = &ns->ns_rs_buckets[idx];
908 at_init(&nsb->nsb_at_estimate, ldlm_enqueue_min, 0);
909 nsb->nsb_namespace = ns;
910 nsb->nsb_reclaim_start = 0;
911 atomic_set(&nsb->nsb_count, 0);
915 ns->ns_appetite = apt;
916 ns->ns_client = client;
917 ns->ns_name = kstrdup(name, GFP_KERNEL);
921 INIT_LIST_HEAD(&ns->ns_list_chain);
922 INIT_LIST_HEAD(&ns->ns_unused_list);
923 spin_lock_init(&ns->ns_lock);
924 atomic_set(&ns->ns_bref, 0);
925 init_waitqueue_head(&ns->ns_waitq);
927 ns->ns_max_nolock_size = NS_DEFAULT_MAX_NOLOCK_BYTES;
928 ns->ns_contention_time = NS_DEFAULT_CONTENTION_SECONDS;
929 ns->ns_contended_locks = NS_DEFAULT_CONTENDED_LOCKS;
931 ns->ns_max_parallel_ast = LDLM_DEFAULT_PARALLEL_AST_LIMIT;
932 ns->ns_nr_unused = 0;
933 ns->ns_max_unused = LDLM_DEFAULT_LRU_SIZE;
934 ns->ns_cancel_batch = LDLM_DEFAULT_LRU_SHRINK_BATCH;
935 ns->ns_max_age = ktime_set(LDLM_DEFAULT_MAX_ALIVE, 0);
936 ns->ns_ctime_age_limit = LDLM_CTIME_AGE_LIMIT;
937 ns->ns_dirty_age_limit = ktime_set(LDLM_DIRTY_AGE_LIMIT, 0);
939 ns->ns_orig_connect_flags = 0;
940 ns->ns_connect_flags = 0;
942 ns->ns_reclaim_start = 0;
943 ns->ns_last_pos = &ns->ns_unused_list;
946 rc = ldlm_namespace_sysfs_register(ns);
948 CERROR("Can't initialize ns sysfs, rc %d\n", rc);
952 rc = ldlm_namespace_debugfs_register(ns);
954 CERROR("Can't initialize ns proc, rc %d\n", rc);
958 idx = ldlm_namespace_nr_read(client);
959 rc = ldlm_pool_init(&ns->ns_pool, ns, idx, client);
961 CERROR("Can't initialize lock pool, rc %d\n", rc);
965 ldlm_namespace_register(ns, client);
968 ldlm_namespace_debugfs_unregister(ns);
970 ldlm_namespace_sysfs_unregister(ns);
971 ldlm_namespace_cleanup(ns, 0);
973 OBD_FREE_PTR_ARRAY_LARGE(ns->ns_rs_buckets, 1 << ns->ns_bucket_bits);
975 cfs_hash_putref(ns->ns_rs_hash);
982 EXPORT_SYMBOL(ldlm_namespace_new);
985 * Cancel and destroy all locks on a resource.
987 * If flags contains FL_LOCAL_ONLY, don't try to tell the server, just
988 * clean up. This is currently only used for recovery, and we make
989 * certain assumptions as a result--notably, that we shouldn't cancel
992 static void cleanup_resource(struct ldlm_resource *res, struct list_head *q,
995 struct list_head *tmp;
996 int rc = 0, client = ns_is_client(ldlm_res_to_ns(res));
997 bool local_only = !!(flags & LDLM_FL_LOCAL_ONLY);
1000 struct ldlm_lock *lock = NULL;
1002 /* First, we look for non-cleaned-yet lock
1003 * all cleaned locks are marked by CLEANED flag. */
1005 list_for_each(tmp, q) {
1006 lock = list_entry(tmp, struct ldlm_lock,
1008 if (ldlm_is_cleaned(lock)) {
1012 LDLM_LOCK_GET(lock);
1013 ldlm_set_cleaned(lock);
1022 /* Set CBPENDING so nothing in the cancellation path
1023 * can match this lock. */
1024 ldlm_set_cbpending(lock);
1025 ldlm_set_failed(lock);
1026 lock->l_flags |= flags;
1028 /* ... without sending a CANCEL message for local_only. */
1030 ldlm_set_local_only(lock);
1032 if (local_only && (lock->l_readers || lock->l_writers)) {
1034 * This is a little bit gross, but much better than the
1035 * alternative: pretend that we got a blocking AST from
1036 * the server, so that when the lock is decref'd, it
1040 LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
1041 if (lock->l_flags & LDLM_FL_FAIL_LOC)
1042 schedule_timeout_uninterruptible(
1043 cfs_time_seconds(4));
1045 if (lock->l_completion_ast)
1046 lock->l_completion_ast(lock,
1047 LDLM_FL_FAILED, NULL);
1048 LDLM_LOCK_RELEASE(lock);
1053 struct lustre_handle lockh;
1056 ldlm_lock2handle(lock, &lockh);
1057 rc = ldlm_cli_cancel(&lockh, LCF_LOCAL);
1059 CERROR("ldlm_cli_cancel: %d\n", rc);
1063 "Freeing a lock still held by a client node");
1064 ldlm_lock_cancel(lock);
1066 LDLM_LOCK_RELEASE(lock);
1070 static int ldlm_resource_clean(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1071 struct hlist_node *hnode, void *arg)
1073 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1074 __u64 flags = *(__u64 *)arg;
1076 cleanup_resource(res, &res->lr_granted, flags);
1077 cleanup_resource(res, &res->lr_waiting, flags);
1082 static int ldlm_resource_complain(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1083 struct hlist_node *hnode, void *arg)
1085 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1088 CERROR("%s: namespace resource "DLDLMRES" (%p) refcount nonzero "
1089 "(%d) after lock cleanup; forcing cleanup.\n",
1090 ldlm_ns_name(ldlm_res_to_ns(res)), PLDLMRES(res), res,
1091 atomic_read(&res->lr_refcount) - 1);
1093 /* Use D_NETERROR since it is in the default mask */
1094 ldlm_resource_dump(D_NETERROR, res);
1100 * Cancel and destroy all locks in the namespace.
1102 * Typically used during evictions when server notified client that it was
1103 * evicted and all of its state needs to be destroyed.
1104 * Also used during shutdown.
1106 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, __u64 flags)
1109 CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
1113 cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_clean,
1115 cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_complain,
1119 EXPORT_SYMBOL(ldlm_namespace_cleanup);
1122 * Attempts to free namespace.
1124 * Only used when namespace goes away, like during an unmount.
1126 static int __ldlm_namespace_free(struct ldlm_namespace *ns, int force)
1130 /* At shutdown time, don't call the cancellation callback */
1131 ldlm_namespace_cleanup(ns, force ? LDLM_FL_LOCAL_ONLY : 0);
1133 if (atomic_read(&ns->ns_bref) > 0) {
1136 "dlm namespace %s free waiting on refcount %d\n",
1137 ldlm_ns_name(ns), atomic_read(&ns->ns_bref));
1140 rc = wait_event_idle_timeout(
1142 atomic_read(&ns->ns_bref) == 0,
1143 cfs_time_seconds(1) / 4);
1145 rc = l_wait_event_abortable(
1146 ns->ns_waitq, atomic_read(&ns->ns_bref) == 0);
1148 /* Forced cleanups should be able to reclaim all references,
1149 * so it's safe to wait forever... we can't leak locks... */
1150 if (force && rc == 0) {
1152 LCONSOLE_ERROR("Forced cleanup waiting for %s "
1153 "namespace with %d resources in use, "
1154 "(rc=%d)\n", ldlm_ns_name(ns),
1155 atomic_read(&ns->ns_bref), rc);
1156 GOTO(force_wait, rc);
1159 if (atomic_read(&ns->ns_bref)) {
1160 LCONSOLE_ERROR("Cleanup waiting for %s namespace "
1161 "with %d resources in use, (rc=%d)\n",
1163 atomic_read(&ns->ns_bref), rc);
1164 RETURN(ELDLM_NAMESPACE_EXISTS);
1166 CDEBUG(D_DLMTRACE, "dlm namespace %s free done waiting\n",
1174 * Performs various cleanups for passed \a ns to make it drop refc and be
1175 * ready for freeing. Waits for refc == 0.
1177 * The following is done:
1178 * (0) Unregister \a ns from its list to make inaccessible for potential
1179 * users like pools thread and others;
1180 * (1) Clear all locks in \a ns.
1182 void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
1183 struct obd_import *imp,
1194 spin_lock(&ns->ns_lock);
1195 ns->ns_stopping = 1;
1196 spin_unlock(&ns->ns_lock);
1199 * Can fail with -EINTR when force == 0 in which case try harder.
1201 rc = __ldlm_namespace_free(ns, force);
1202 if (rc != ELDLM_OK) {
1204 ptlrpc_disconnect_import(imp, 0);
1205 ptlrpc_invalidate_import(imp);
1209 * With all requests dropped and the import inactive
1210 * we are gaurenteed all reference will be dropped.
1212 rc = __ldlm_namespace_free(ns, 1);
1217 EXPORT_SYMBOL(ldlm_namespace_free_prior);
1220 * Performs freeing memory structures related to \a ns. This is only done
1221 * when ldlm_namespce_free_prior() successfully removed all resources
1222 * referencing \a ns and its refc == 0.
1224 void ldlm_namespace_free_post(struct ldlm_namespace *ns)
1232 /* Make sure that nobody can find this ns in its list. */
1233 ldlm_namespace_unregister(ns, ns->ns_client);
1234 /* Fini pool _before_ parent proc dir is removed. This is important as
1235 * ldlm_pool_fini() removes own proc dir which is child to @dir.
1236 * Removing it after @dir may cause oops. */
1237 ldlm_pool_fini(&ns->ns_pool);
1239 ldlm_namespace_debugfs_unregister(ns);
1240 ldlm_namespace_sysfs_unregister(ns);
1241 cfs_hash_putref(ns->ns_rs_hash);
1242 OBD_FREE_PTR_ARRAY_LARGE(ns->ns_rs_buckets, 1 << ns->ns_bucket_bits);
1244 /* Namespace \a ns should be not on list at this time, otherwise
1245 * this will cause issues related to using freed \a ns in poold
1248 LASSERT(list_empty(&ns->ns_list_chain));
1253 EXPORT_SYMBOL(ldlm_namespace_free_post);
1256 * Cleanup the resource, and free namespace.
1259 * proc1: destroy import
1260 * class_disconnect_export(grab cl_sem) ->
1261 * -> ldlm_namespace_free ->
1262 * -> lprocfs_remove(grab _lprocfs_lock).
1263 * proc2: read proc info
1264 * lprocfs_fops_read(grab _lprocfs_lock) ->
1265 * -> osc_rd_active, etc(grab cl_sem).
1267 * So that I have to split the ldlm_namespace_free into two parts - the first
1268 * part ldlm_namespace_free_prior is used to cleanup the resource which is
1269 * being used; the 2nd part ldlm_namespace_free_post is used to unregister the
1270 * lprocfs entries, and then free memory. It will be called w/o cli->cl_sem
1273 void ldlm_namespace_free(struct ldlm_namespace *ns,
1274 struct obd_import *imp,
1277 ldlm_namespace_free_prior(ns, imp, force);
1278 ldlm_namespace_free_post(ns);
1280 EXPORT_SYMBOL(ldlm_namespace_free);
1282 void ldlm_namespace_get(struct ldlm_namespace *ns)
1284 atomic_inc(&ns->ns_bref);
1287 /* This is only for callers that care about refcount */
1288 static int ldlm_namespace_get_return(struct ldlm_namespace *ns)
1290 return atomic_inc_return(&ns->ns_bref);
1293 void ldlm_namespace_put(struct ldlm_namespace *ns)
1295 if (atomic_dec_and_lock(&ns->ns_bref, &ns->ns_lock)) {
1296 wake_up(&ns->ns_waitq);
1297 spin_unlock(&ns->ns_lock);
1301 /** Register \a ns in the list of namespaces */
1302 void ldlm_namespace_register(struct ldlm_namespace *ns, enum ldlm_side client)
1304 mutex_lock(ldlm_namespace_lock(client));
1305 LASSERT(list_empty(&ns->ns_list_chain));
1306 list_add(&ns->ns_list_chain, ldlm_namespace_inactive_list(client));
1307 ldlm_namespace_nr_inc(client);
1308 mutex_unlock(ldlm_namespace_lock(client));
1311 /** Unregister \a ns from the list of namespaces. */
1312 void ldlm_namespace_unregister(struct ldlm_namespace *ns, enum ldlm_side client)
1314 mutex_lock(ldlm_namespace_lock(client));
1315 LASSERT(!list_empty(&ns->ns_list_chain));
1316 /* Some asserts and possibly other parts of the code are still
1317 * using list_empty(&ns->ns_list_chain). This is why it is
1318 * important to use list_del_init() here. */
1319 list_del_init(&ns->ns_list_chain);
1320 ldlm_namespace_nr_dec(client);
1321 mutex_unlock(ldlm_namespace_lock(client));
1324 /** Should be called with ldlm_namespace_lock(client) taken. */
1325 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *ns,
1326 enum ldlm_side client)
1328 LASSERT(!list_empty(&ns->ns_list_chain));
1329 LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
1330 list_move_tail(&ns->ns_list_chain, ldlm_namespace_list(client));
1333 /** Should be called with ldlm_namespace_lock(client) taken. */
1334 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *ns,
1335 enum ldlm_side client)
1337 LASSERT(!list_empty(&ns->ns_list_chain));
1338 LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
1339 list_move_tail(&ns->ns_list_chain,
1340 ldlm_namespace_inactive_list(client));
1343 /** Should be called with ldlm_namespace_lock(client) taken. */
1344 struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side client)
1346 LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
1347 LASSERT(!list_empty(ldlm_namespace_list(client)));
1348 return container_of(ldlm_namespace_list(client)->next,
1349 struct ldlm_namespace, ns_list_chain);
1352 static bool ldlm_resource_extent_new(struct ldlm_resource *res)
1356 OBD_SLAB_ALLOC(res->lr_itree, ldlm_interval_tree_slab,
1357 sizeof(*res->lr_itree) * LCK_MODE_NUM);
1358 if (res->lr_itree == NULL)
1360 /* Initialize interval trees for each lock mode. */
1361 for (idx = 0; idx < LCK_MODE_NUM; idx++) {
1362 res->lr_itree[idx].lit_size = 0;
1363 res->lr_itree[idx].lit_mode = BIT(idx);
1364 res->lr_itree[idx].lit_root = NULL;
1369 static bool ldlm_resource_inodebits_new(struct ldlm_resource *res)
1373 OBD_ALLOC_PTR(res->lr_ibits_queues);
1374 if (res->lr_ibits_queues == NULL)
1376 for (i = 0; i < MDS_INODELOCK_NUMBITS; i++)
1377 INIT_LIST_HEAD(&res->lr_ibits_queues->liq_waiting[i]);
1381 /** Create and initialize new resource. */
1382 static struct ldlm_resource *ldlm_resource_new(enum ldlm_type ldlm_type)
1384 struct ldlm_resource *res;
1387 OBD_SLAB_ALLOC_PTR_GFP(res, ldlm_resource_slab, GFP_NOFS);
1391 switch (ldlm_type) {
1393 rc = ldlm_resource_extent_new(res);
1396 rc = ldlm_resource_inodebits_new(res);
1403 OBD_SLAB_FREE_PTR(res, ldlm_resource_slab);
1407 INIT_LIST_HEAD(&res->lr_granted);
1408 INIT_LIST_HEAD(&res->lr_waiting);
1410 atomic_set(&res->lr_refcount, 1);
1411 spin_lock_init(&res->lr_lock);
1412 lu_ref_init(&res->lr_reference);
1414 /* Since LVB init can be delayed now, there is no longer need to
1415 * immediatelly acquire mutex here. */
1416 mutex_init(&res->lr_lvb_mutex);
1417 res->lr_lvb_initialized = false;
1422 static void ldlm_resource_free(struct ldlm_resource *res)
1424 if (res->lr_type == LDLM_EXTENT) {
1425 if (res->lr_itree != NULL)
1426 OBD_SLAB_FREE(res->lr_itree, ldlm_interval_tree_slab,
1427 sizeof(*res->lr_itree) * LCK_MODE_NUM);
1428 } else if (res->lr_type == LDLM_IBITS) {
1429 if (res->lr_ibits_queues != NULL)
1430 OBD_FREE_PTR(res->lr_ibits_queues);
1433 OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
1437 * Return a reference to resource with given name, creating it if necessary.
1438 * Args: namespace with ns_lock unlocked
1439 * Locks: takes and releases NS hash-lock and res->lr_lock
1440 * Returns: referenced, unlocked ldlm_resource or NULL
1442 struct ldlm_resource *
1443 ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
1444 const struct ldlm_res_id *name, enum ldlm_type type,
1447 struct hlist_node *hnode;
1448 struct ldlm_resource *res = NULL;
1449 struct cfs_hash_bd bd;
1451 int ns_refcount = 0;
1454 LASSERT(ns != NULL);
1455 LASSERT(parent == NULL);
1456 LASSERT(ns->ns_rs_hash != NULL);
1457 LASSERT(name->name[0] != 0);
1459 cfs_hash_bd_get_and_lock(ns->ns_rs_hash, (void *)name, &bd, 0);
1460 hnode = cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
1461 if (hnode != NULL) {
1462 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
1466 version = cfs_hash_bd_version_get(&bd);
1467 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
1470 return ERR_PTR(-ENOENT);
1472 LASSERTF(type >= LDLM_MIN_TYPE && type < LDLM_MAX_TYPE,
1473 "type: %d\n", type);
1474 res = ldlm_resource_new(type);
1476 return ERR_PTR(-ENOMEM);
1478 hash = ldlm_res_hop_fid_hash(name, ns->ns_bucket_bits);
1479 res->lr_ns_bucket = &ns->ns_rs_buckets[hash];
1480 res->lr_name = *name;
1481 res->lr_type = type;
1483 cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
1484 hnode = (version == cfs_hash_bd_version_get(&bd)) ? NULL :
1485 cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
1487 if (hnode != NULL) {
1488 /* Someone won the race and already added the resource. */
1489 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1490 /* Clean lu_ref for failed resource. */
1491 lu_ref_fini(&res->lr_reference);
1492 ldlm_resource_free(res);
1494 res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
1497 /* We won! Let's add the resource. */
1498 cfs_hash_bd_add_locked(ns->ns_rs_hash, &bd, &res->lr_hash);
1499 if (atomic_inc_return(&res->lr_ns_bucket->nsb_count) == 1)
1500 ns_refcount = ldlm_namespace_get_return(ns);
1502 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1504 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CREATE_RESOURCE, 2);
1506 /* Let's see if we happened to be the very first resource in this
1507 * namespace. If so, and this is a client namespace, we need to move
1508 * the namespace into the active namespaces list to be patrolled by
1509 * the ldlm_poold. */
1510 if (ns_is_client(ns) && ns_refcount == 1) {
1511 mutex_lock(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
1512 ldlm_namespace_move_to_active_locked(ns, LDLM_NAMESPACE_CLIENT);
1513 mutex_unlock(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
1518 EXPORT_SYMBOL(ldlm_resource_get);
1520 struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res)
1522 LASSERT(res != NULL);
1523 LASSERT(res != LP_POISON);
1524 atomic_inc(&res->lr_refcount);
1525 CDEBUG(D_INFO, "getref res: %p count: %d\n", res,
1526 atomic_read(&res->lr_refcount));
1530 static void __ldlm_resource_putref_final(struct cfs_hash_bd *bd,
1531 struct ldlm_resource *res)
1533 struct ldlm_ns_bucket *nsb = res->lr_ns_bucket;
1535 if (!list_empty(&res->lr_granted)) {
1536 ldlm_resource_dump(D_ERROR, res);
1540 if (!list_empty(&res->lr_waiting)) {
1541 ldlm_resource_dump(D_ERROR, res);
1545 cfs_hash_bd_del_locked(nsb->nsb_namespace->ns_rs_hash,
1547 lu_ref_fini(&res->lr_reference);
1548 if (atomic_dec_and_test(&nsb->nsb_count))
1549 ldlm_namespace_put(nsb->nsb_namespace);
1552 /* Returns 1 if the resource was freed, 0 if it remains. */
1553 int ldlm_resource_putref(struct ldlm_resource *res)
1555 struct ldlm_namespace *ns = ldlm_res_to_ns(res);
1556 struct cfs_hash_bd bd;
1558 LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
1559 CDEBUG(D_INFO, "putref res: %p count: %d\n",
1560 res, atomic_read(&res->lr_refcount) - 1);
1562 cfs_hash_bd_get(ns->ns_rs_hash, &res->lr_name, &bd);
1563 if (cfs_hash_bd_dec_and_lock(ns->ns_rs_hash, &bd, &res->lr_refcount)) {
1564 __ldlm_resource_putref_final(&bd, res);
1565 cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
1566 if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
1567 ns->ns_lvbo->lvbo_free(res);
1568 ldlm_resource_free(res);
1573 EXPORT_SYMBOL(ldlm_resource_putref);
1575 static void __ldlm_resource_add_lock(struct ldlm_resource *res,
1576 struct list_head *head,
1577 struct ldlm_lock *lock,
1580 check_res_locked(res);
1582 if (ldlm_is_destroyed(lock)) {
1583 CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
1587 LASSERT(list_empty(&lock->l_res_link));
1590 list_add_tail(&lock->l_res_link, head);
1592 list_add(&lock->l_res_link, head);
1594 if (res->lr_type == LDLM_IBITS)
1595 ldlm_inodebits_add_lock(res, head, lock);
1597 ldlm_resource_dump(D_INFO, res);
1601 * Add a lock into a given resource into specified lock list.
1603 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
1604 struct ldlm_lock *lock)
1606 LDLM_DEBUG(lock, "About to add this lock");
1608 __ldlm_resource_add_lock(res, head, lock, true);
1612 * Insert a lock into resource after specified lock.
1614 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
1615 struct ldlm_lock *new)
1617 LASSERT(!list_empty(&original->l_res_link));
1619 LDLM_DEBUG(new, "About to insert this lock after %p: ", original);
1620 __ldlm_resource_add_lock(original->l_resource,
1621 &original->l_res_link,
1626 * Insert a lock into resource before the specified lock.
1628 void ldlm_resource_insert_lock_before(struct ldlm_lock *original,
1629 struct ldlm_lock *new)
1631 LASSERT(!list_empty(&original->l_res_link));
1633 LDLM_DEBUG(new, "About to insert this lock before %p: ", original);
1634 __ldlm_resource_add_lock(original->l_resource,
1635 original->l_res_link.prev, new, false);
1638 void ldlm_resource_unlink_lock(struct ldlm_lock *lock)
1640 int type = lock->l_resource->lr_type;
1642 check_res_locked(lock->l_resource);
1645 ldlm_unlink_lock_skiplist(lock);
1648 ldlm_extent_unlink_lock(lock);
1651 ldlm_inodebits_unlink_lock(lock);
1654 list_del_init(&lock->l_res_link);
1656 EXPORT_SYMBOL(ldlm_resource_unlink_lock);
1658 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc)
1660 desc->lr_type = res->lr_type;
1661 desc->lr_name = res->lr_name;
1665 * Print information about all locks in all namespaces on this node to debug
1668 void ldlm_dump_all_namespaces(enum ldlm_side client, int level)
1670 struct list_head *tmp;
1672 if (!((libcfs_debug | D_ERROR) & level))
1675 mutex_lock(ldlm_namespace_lock(client));
1677 list_for_each(tmp, ldlm_namespace_list(client)) {
1678 struct ldlm_namespace *ns;
1680 ns = list_entry(tmp, struct ldlm_namespace, ns_list_chain);
1681 ldlm_namespace_dump(level, ns);
1684 mutex_unlock(ldlm_namespace_lock(client));
1687 static int ldlm_res_hash_dump(struct cfs_hash *hs, struct cfs_hash_bd *bd,
1688 struct hlist_node *hnode, void *arg)
1690 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
1691 int level = (int)(unsigned long)arg;
1694 ldlm_resource_dump(level, res);
1701 * Print information about all locks in this namespace on this node to debug
1704 void ldlm_namespace_dump(int level, struct ldlm_namespace *ns)
1706 if (!((libcfs_debug | D_ERROR) & level))
1709 CDEBUG(level, "--- Namespace: %s (rc: %d, side: %s)\n",
1710 ldlm_ns_name(ns), atomic_read(&ns->ns_bref),
1711 ns_is_client(ns) ? "client" : "server");
1713 if (ktime_get_seconds() < ns->ns_next_dump)
1716 cfs_hash_for_each_nolock(ns->ns_rs_hash,
1718 (void *)(unsigned long)level, 0);
1719 spin_lock(&ns->ns_lock);
1720 ns->ns_next_dump = ktime_get_seconds() + 10;
1721 spin_unlock(&ns->ns_lock);
1725 * Print information about all locks in this resource to debug log.
1727 void ldlm_resource_dump(int level, struct ldlm_resource *res)
1729 struct ldlm_lock *lock;
1730 unsigned int granted = 0;
1732 BUILD_BUG_ON(RES_NAME_SIZE != 4);
1734 if (!((libcfs_debug | D_ERROR) & level))
1737 CDEBUG(level, "--- Resource: "DLDLMRES" (%p) refcount = %d\n",
1738 PLDLMRES(res), res, atomic_read(&res->lr_refcount));
1740 if (!list_empty(&res->lr_granted)) {
1741 CDEBUG(level, "Granted locks (in reverse order):\n");
1742 list_for_each_entry_reverse(lock, &res->lr_granted,
1744 LDLM_DEBUG_LIMIT(level, lock, "###");
1745 if (!(level & D_CANTMASK) &&
1746 ++granted > ldlm_dump_granted_max) {
1748 "only dump %d granted locks to avoid DDOS.\n",
1755 if (!list_empty(&res->lr_waiting)) {
1756 CDEBUG(level, "Waiting locks:\n");
1757 list_for_each_entry(lock, &res->lr_waiting, l_res_link)
1758 LDLM_DEBUG_LIMIT(level, lock, "###");
1761 EXPORT_SYMBOL(ldlm_resource_dump);