*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2010, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_LDLM
-#ifdef __KERNEL__
-# include <lustre_dlm.h>
-#else
-# include <liblustre.h>
-#endif
-
+#include <lustre_dlm.h>
#include <lustre_fid.h>
#include <obd_class.h>
#include "ldlm_internal.h"
-cfs_mem_cache_t *ldlm_resource_slab, *ldlm_lock_slab;
-
-cfs_atomic_t ldlm_srv_namespace_nr = CFS_ATOMIC_INIT(0);
-cfs_atomic_t ldlm_cli_namespace_nr = CFS_ATOMIC_INIT(0);
+struct kmem_cache *ldlm_resource_slab, *ldlm_lock_slab;
+struct kmem_cache *ldlm_interval_tree_slab;
+struct kmem_cache *ldlm_inodebits_slab;
-cfs_mutex_t ldlm_srv_namespace_lock;
-CFS_LIST_HEAD(ldlm_srv_namespace_list);
+int ldlm_srv_namespace_nr = 0;
+int ldlm_cli_namespace_nr = 0;
-cfs_mutex_t ldlm_cli_namespace_lock;
-CFS_LIST_HEAD(ldlm_cli_namespace_list);
+DEFINE_MUTEX(ldlm_srv_namespace_lock);
+LIST_HEAD(ldlm_srv_namespace_list);
-cfs_proc_dir_entry_t *ldlm_type_proc_dir = NULL;
-cfs_proc_dir_entry_t *ldlm_ns_proc_dir = NULL;
-cfs_proc_dir_entry_t *ldlm_svc_proc_dir = NULL;
+DEFINE_MUTEX(ldlm_cli_namespace_lock);
+/* Client Namespaces that have active resources in them.
+ * Once all resources go away, ldlm_poold moves such namespaces to the
+ * inactive list */
+LIST_HEAD(ldlm_cli_active_namespace_list);
+/* Client namespaces that don't have any locks in them */
+LIST_HEAD(ldlm_cli_inactive_namespace_list);
-extern unsigned int ldlm_cancel_unused_locks_before_replay;
+static struct dentry *ldlm_debugfs_dir;
+static struct dentry *ldlm_ns_debugfs_dir;
+struct dentry *ldlm_svc_debugfs_dir;
/* during debug dump certain amount of granted locks for one resource to avoid
* DDOS. */
-unsigned int ldlm_dump_granted_max = 256;
-
-#ifdef LPROCFS
-static int ldlm_proc_dump_ns(struct file *file, const char *buffer,
- unsigned long count, void *data)
-{
- ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
- ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
- RETURN(count);
-}
-
-int ldlm_proc_setup(void)
-{
- int rc;
- struct lprocfs_vars list[] = {
- { "dump_namespaces", NULL, ldlm_proc_dump_ns, NULL },
- { "dump_granted_max",
- lprocfs_rd_uint, lprocfs_wr_uint,
- &ldlm_dump_granted_max, NULL },
- { "cancel_unused_locks_before_replay",
- lprocfs_rd_uint, lprocfs_wr_uint,
- &ldlm_cancel_unused_locks_before_replay, NULL },
- { NULL }};
- ENTRY;
- LASSERT(ldlm_ns_proc_dir == NULL);
-
- ldlm_type_proc_dir = lprocfs_register(OBD_LDLM_DEVICENAME,
- proc_lustre_root,
- NULL, NULL);
- if (IS_ERR(ldlm_type_proc_dir)) {
- CERROR("LProcFS failed in ldlm-init\n");
- rc = PTR_ERR(ldlm_type_proc_dir);
- GOTO(err, rc);
- }
-
- ldlm_ns_proc_dir = lprocfs_register("namespaces",
- ldlm_type_proc_dir,
- NULL, NULL);
- if (IS_ERR(ldlm_ns_proc_dir)) {
- CERROR("LProcFS failed in ldlm-init\n");
- rc = PTR_ERR(ldlm_ns_proc_dir);
- GOTO(err_type, rc);
- }
-
- ldlm_svc_proc_dir = lprocfs_register("services",
- ldlm_type_proc_dir,
- NULL, NULL);
- if (IS_ERR(ldlm_svc_proc_dir)) {
- CERROR("LProcFS failed in ldlm-init\n");
- rc = PTR_ERR(ldlm_svc_proc_dir);
- GOTO(err_ns, rc);
- }
-
- rc = lprocfs_add_vars(ldlm_type_proc_dir, list, NULL);
-
- RETURN(0);
+static unsigned int ldlm_dump_granted_max = 256;
+
+static ssize_t ldebugfs_dump_ns_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
+ ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
+ RETURN(count);
+}
+
+LDEBUGFS_FOPS_WR_ONLY(ldlm, dump_ns);
+
+static int ldlm_rw_uint_seq_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%u\n", *(unsigned int *)m->private);
+ return 0;
+}
+
+static ssize_t
+ldlm_rw_uint_seq_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ struct seq_file *seq = file->private_data;
+
+ if (!count)
+ return 0;
+
+ return kstrtouint_from_user(buffer, count, 0,
+ (unsigned int *)seq->private);
+}
+
+LDEBUGFS_SEQ_FOPS(ldlm_rw_uint);
+
+#ifdef HAVE_SERVER_SUPPORT
+
+static int seq_watermark_show(struct seq_file *m, void *data)
+{
+ seq_printf(m, "%llu\n", *(__u64 *)m->private);
+ return 0;
+}
+static ssize_t seq_watermark_write(struct file *file,
+ const char __user *buffer, size_t count,
+ loff_t *off)
+{
+ __s64 value;
+ __u64 watermark;
+ __u64 *data = ((struct seq_file *)file->private_data)->private;
+ bool wm_low = (data == &ldlm_reclaim_threshold_mb) ? true : false;
+ int rc;
+
+ rc = lprocfs_str_with_units_to_s64(buffer, count, &value, 'M');
+ if (rc) {
+ CERROR("Failed to set %s, rc = %d.\n",
+ wm_low ? "lock_reclaim_threshold_mb" : "lock_limit_mb",
+ rc);
+ return rc;
+ } else if (value != 0 && value < (1 << 20)) {
+ CERROR("%s should be greater than 1MB.\n",
+ wm_low ? "lock_reclaim_threshold_mb" : "lock_limit_mb");
+ return -EINVAL;
+ }
+ watermark = value >> 20;
+
+ if (wm_low) {
+ if (ldlm_lock_limit_mb != 0 && watermark > ldlm_lock_limit_mb) {
+ CERROR("lock_reclaim_threshold_mb must be smaller than "
+ "lock_limit_mb.\n");
+ return -EINVAL;
+ }
+
+ *data = watermark;
+ if (watermark != 0) {
+ watermark <<= 20;
+ do_div(watermark, sizeof(struct ldlm_lock));
+ }
+ ldlm_reclaim_threshold = watermark;
+ } else {
+ if (ldlm_reclaim_threshold_mb != 0 &&
+ watermark < ldlm_reclaim_threshold_mb) {
+ CERROR("lock_limit_mb must be greater than "
+ "lock_reclaim_threshold_mb.\n");
+ return -EINVAL;
+ }
+
+ *data = watermark;
+ if (watermark != 0) {
+ watermark <<= 20;
+ do_div(watermark, sizeof(struct ldlm_lock));
+ }
+ ldlm_lock_limit = watermark;
+ }
+
+ return count;
+}
+
+static int seq_watermark_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, seq_watermark_show, inode->i_private);
+}
+
+static const struct file_operations ldlm_watermark_fops = {
+ .owner = THIS_MODULE,
+ .open = seq_watermark_open,
+ .read = seq_read,
+ .write = seq_watermark_write,
+ .llseek = seq_lseek,
+ .release = lprocfs_single_release,
+};
+
+static int seq_granted_show(struct seq_file *m, void *data)
+{
+ seq_printf(m, "%llu\n", percpu_counter_sum_positive(
+ (struct percpu_counter *)m->private));
+ return 0;
+}
+
+static int seq_granted_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, seq_granted_show, inode->i_private);
+}
+
+static const struct file_operations ldlm_granted_fops = {
+ .owner = THIS_MODULE,
+ .open = seq_granted_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif /* HAVE_SERVER_SUPPORT */
+
+static struct lprocfs_vars ldlm_debugfs_list[] = {
+ { .name = "dump_namespaces",
+ .fops = &ldlm_dump_ns_fops,
+ .proc_mode = 0222 },
+ { .name = "dump_granted_max",
+ .fops = &ldlm_rw_uint_fops,
+ .data = &ldlm_dump_granted_max },
+#ifdef HAVE_SERVER_SUPPORT
+ { .name = "lock_reclaim_threshold_mb",
+ .fops = &ldlm_watermark_fops,
+ .data = &ldlm_reclaim_threshold_mb },
+ { .name = "lock_limit_mb",
+ .fops = &ldlm_watermark_fops,
+ .data = &ldlm_lock_limit_mb },
+ { .name = "lock_granted_count",
+ .fops = &ldlm_granted_fops,
+ .data = &ldlm_granted_total },
+#endif
+ { NULL }
+};
+
+int ldlm_debugfs_setup(void)
+{
+ int rc;
+
+ ENTRY;
+ ldlm_debugfs_dir = ldebugfs_register(OBD_LDLM_DEVICENAME,
+ debugfs_lustre_root,
+ NULL, NULL);
+ if (IS_ERR_OR_NULL(ldlm_debugfs_dir)) {
+ CERROR("LDebugFS failed in ldlm-init\n");
+ rc = ldlm_debugfs_dir ? PTR_ERR(ldlm_debugfs_dir) : -ENOMEM;
+ GOTO(err, rc);
+ }
+
+ ldlm_ns_debugfs_dir = ldebugfs_register("namespaces",
+ ldlm_debugfs_dir,
+ NULL, NULL);
+ if (IS_ERR_OR_NULL(ldlm_ns_debugfs_dir)) {
+ CERROR("LProcFS failed in ldlm-init\n");
+ rc = ldlm_ns_debugfs_dir ? PTR_ERR(ldlm_ns_debugfs_dir)
+ : -ENOMEM;
+ GOTO(err_type, rc);
+ }
+
+ ldlm_svc_debugfs_dir = ldebugfs_register("services",
+ ldlm_debugfs_dir,
+ NULL, NULL);
+ if (IS_ERR_OR_NULL(ldlm_svc_debugfs_dir)) {
+ CERROR("LProcFS failed in ldlm-init\n");
+ rc = ldlm_svc_debugfs_dir ? PTR_ERR(ldlm_svc_debugfs_dir)
+ : -ENOMEM;
+ GOTO(err_ns, rc);
+ }
+
+ rc = ldebugfs_add_vars(ldlm_debugfs_dir, ldlm_debugfs_list, NULL);
+ if (rc != 0) {
+ CERROR("LProcFS failed in ldlm-init\n");
+ GOTO(err_svc, rc);
+ }
+
+ RETURN(0);
+
+err_svc:
+ ldebugfs_remove(&ldlm_svc_debugfs_dir);
err_ns:
- lprocfs_remove(&ldlm_ns_proc_dir);
+ ldebugfs_remove(&ldlm_ns_debugfs_dir);
err_type:
- lprocfs_remove(&ldlm_type_proc_dir);
+ ldebugfs_remove(&ldlm_debugfs_dir);
err:
- ldlm_svc_proc_dir = NULL;
- RETURN(rc);
+ ldlm_svc_debugfs_dir = NULL;
+ ldlm_ns_debugfs_dir = NULL;
+ ldlm_debugfs_dir = NULL;
+ RETURN(rc);
}
-void ldlm_proc_cleanup(void)
+void ldlm_debugfs_cleanup(void)
{
- if (ldlm_svc_proc_dir)
- lprocfs_remove(&ldlm_svc_proc_dir);
+ if (!IS_ERR_OR_NULL(ldlm_svc_debugfs_dir))
+ ldebugfs_remove(&ldlm_svc_debugfs_dir);
+
+ if (!IS_ERR_OR_NULL(ldlm_ns_debugfs_dir))
+ ldebugfs_remove(&ldlm_ns_debugfs_dir);
- if (ldlm_ns_proc_dir)
- lprocfs_remove(&ldlm_ns_proc_dir);
+ if (!IS_ERR_OR_NULL(ldlm_debugfs_dir))
+ ldebugfs_remove(&ldlm_debugfs_dir);
- if (ldlm_type_proc_dir)
- lprocfs_remove(&ldlm_type_proc_dir);
+ ldlm_svc_debugfs_dir = NULL;
+ ldlm_ns_debugfs_dir = NULL;
+ ldlm_debugfs_dir = NULL;
}
-static int lprocfs_rd_ns_resources(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- struct ldlm_namespace *ns = data;
- __u64 res = 0;
- cfs_hash_bd_t bd;
- int i;
-
- /* result is not strictly consistant */
- cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, i)
- res += cfs_hash_bd_count_get(&bd);
- return lprocfs_rd_u64(page, start, off, count, eof, &res);
-}
-
-static int lprocfs_rd_ns_locks(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- struct ldlm_namespace *ns = data;
- __u64 locks;
-
- locks = lprocfs_stats_collector(ns->ns_stats, LDLM_NSS_LOCKS,
- LPROCFS_FIELDS_FLAGS_SUM);
- return lprocfs_rd_u64(page, start, off, count, eof, &locks);
-}
-
-static int lprocfs_rd_lru_size(char *page, char **start, off_t off,
- int count, int *eof, void *data)
-{
- struct ldlm_namespace *ns = data;
- __u32 *nr = &ns->ns_max_unused;
-
- if (ns_connect_lru_resize(ns))
- nr = &ns->ns_nr_unused;
- return lprocfs_rd_uint(page, start, off, count, eof, nr);
-}
-
-static int lprocfs_wr_lru_size(struct file *file, const char *buffer,
- unsigned long count, void *data)
-{
- struct ldlm_namespace *ns = data;
- char dummy[MAX_STRING_SIZE + 1], *end;
- unsigned long tmp;
- int lru_resize;
-
- dummy[MAX_STRING_SIZE] = '\0';
- if (cfs_copy_from_user(dummy, buffer, MAX_STRING_SIZE))
- return -EFAULT;
-
- if (strncmp(dummy, "clear", 5) == 0) {
- CDEBUG(D_DLMTRACE,
- "dropping all unused locks from namespace %s\n",
- ldlm_ns_name(ns));
- if (ns_connect_lru_resize(ns)) {
- int canceled, unused = ns->ns_nr_unused;
-
- /* Try to cancel all @ns_nr_unused locks. */
- canceled = ldlm_cancel_lru(ns, unused, LDLM_SYNC,
- LDLM_CANCEL_PASSED);
- if (canceled < unused) {
- CDEBUG(D_DLMTRACE,
- "not all requested locks are canceled, "
- "requested: %d, canceled: %d\n", unused,
- canceled);
- return -EINVAL;
- }
- } else {
- tmp = ns->ns_max_unused;
- ns->ns_max_unused = 0;
- ldlm_cancel_lru(ns, 0, LDLM_SYNC, LDLM_CANCEL_PASSED);
- ns->ns_max_unused = tmp;
- }
- return count;
- }
-
- tmp = simple_strtoul(dummy, &end, 0);
- if (dummy == end) {
- CERROR("invalid value written\n");
- return -EINVAL;
- }
- lru_resize = (tmp == 0);
-
- if (ns_connect_lru_resize(ns)) {
- if (!lru_resize)
- ns->ns_max_unused = (unsigned int)tmp;
-
- if (tmp > ns->ns_nr_unused)
- tmp = ns->ns_nr_unused;
- tmp = ns->ns_nr_unused - tmp;
-
- CDEBUG(D_DLMTRACE,
- "changing namespace %s unused locks from %u to %u\n",
- ldlm_ns_name(ns), ns->ns_nr_unused,
- (unsigned int)tmp);
- ldlm_cancel_lru(ns, tmp, LDLM_ASYNC, LDLM_CANCEL_PASSED);
-
- if (!lru_resize) {
- CDEBUG(D_DLMTRACE,
- "disable lru_resize for namespace %s\n",
- ldlm_ns_name(ns));
- ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
- }
- } else {
- CDEBUG(D_DLMTRACE,
- "changing namespace %s max_unused from %u to %u\n",
- ldlm_ns_name(ns), ns->ns_max_unused,
- (unsigned int)tmp);
- ns->ns_max_unused = (unsigned int)tmp;
- ldlm_cancel_lru(ns, 0, LDLM_ASYNC, LDLM_CANCEL_PASSED);
-
- /* Make sure that originally lru resize was supported before
- * turning it on here. */
- if (lru_resize &&
- (ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
- CDEBUG(D_DLMTRACE,
- "enable lru_resize for namespace %s\n",
- ldlm_ns_name(ns));
- ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
- }
- }
-
- return count;
-}
-
-void ldlm_namespace_proc_unregister(struct ldlm_namespace *ns)
-{
- struct proc_dir_entry *dir;
-
- dir = lprocfs_srch(ldlm_ns_proc_dir, ldlm_ns_name(ns));
- if (dir == NULL) {
- CERROR("dlm namespace %s has no procfs dir?\n",
- ldlm_ns_name(ns));
- } else {
- lprocfs_remove(&dir);
- }
-
- if (ns->ns_stats != NULL)
- lprocfs_free_stats(&ns->ns_stats);
-}
-
-int ldlm_namespace_proc_register(struct ldlm_namespace *ns)
-{
- struct lprocfs_vars lock_vars[2];
- char lock_name[MAX_STRING_SIZE + 1];
-
- LASSERT(ns != NULL);
- LASSERT(ns->ns_rs_hash != NULL);
-
- ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
- if (ns->ns_stats == NULL)
- return -ENOMEM;
-
- lprocfs_counter_init(ns->ns_stats, LDLM_NSS_LOCKS,
- LPROCFS_CNTR_AVGMINMAX, "locks", "locks");
-
- lock_name[MAX_STRING_SIZE] = '\0';
-
- memset(lock_vars, 0, sizeof(lock_vars));
- lock_vars[0].name = lock_name;
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/resource_count",
- ldlm_ns_name(ns));
- lock_vars[0].data = ns;
- lock_vars[0].read_fptr = lprocfs_rd_ns_resources;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_count",
- ldlm_ns_name(ns));
- lock_vars[0].data = ns;
- lock_vars[0].read_fptr = lprocfs_rd_ns_locks;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- if (ns_is_client(ns)) {
- snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_unused_count",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_nr_unused;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_size",
- ldlm_ns_name(ns));
- lock_vars[0].data = ns;
- lock_vars[0].read_fptr = lprocfs_rd_lru_size;
- lock_vars[0].write_fptr = lprocfs_wr_lru_size;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/lru_max_age",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_max_age;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lock_vars[0].write_fptr = lprocfs_wr_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
- } else {
- snprintf(lock_name, MAX_STRING_SIZE, "%s/ctime_age_limit",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_ctime_age_limit;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lock_vars[0].write_fptr = lprocfs_wr_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/lock_timeouts",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_timeouts;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/max_nolock_bytes",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_max_nolock_size;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lock_vars[0].write_fptr = lprocfs_wr_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/contention_seconds",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_contention_time;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lock_vars[0].write_fptr = lprocfs_wr_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/contended_locks",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_contended_locks;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lock_vars[0].write_fptr = lprocfs_wr_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
-
- snprintf(lock_name, MAX_STRING_SIZE, "%s/max_parallel_ast",
- ldlm_ns_name(ns));
- lock_vars[0].data = &ns->ns_max_parallel_ast;
- lock_vars[0].read_fptr = lprocfs_rd_uint;
- lock_vars[0].write_fptr = lprocfs_wr_uint;
- lprocfs_add_vars(ldlm_ns_proc_dir, lock_vars, 0);
- }
- return 0;
+static ssize_t resource_count_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ __u64 res = 0;
+ struct cfs_hash_bd bd;
+ int i;
+
+ /* result is not strictly consistant */
+ cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, i)
+ res += cfs_hash_bd_count_get(&bd);
+ return sprintf(buf, "%lld\n", res);
}
-#undef MAX_STRING_SIZE
-#else /* LPROCFS */
+LUSTRE_RO_ATTR(resource_count);
-#define ldlm_namespace_proc_unregister(ns) ({;})
-#define ldlm_namespace_proc_register(ns) ({0;})
+static ssize_t lock_count_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ __u64 locks;
-#endif /* LPROCFS */
+ locks = lprocfs_stats_collector(ns->ns_stats, LDLM_NSS_LOCKS,
+ LPROCFS_FIELDS_FLAGS_SUM);
+ return sprintf(buf, "%lld\n", locks);
+}
+LUSTRE_RO_ATTR(lock_count);
-static unsigned ldlm_res_hop_hash(cfs_hash_t *hs,
- const void *key, unsigned mask)
+static ssize_t lock_unused_count_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
{
- const struct ldlm_res_id *id = key;
- unsigned val = 0;
- unsigned i;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
- for (i = 0; i < RES_NAME_SIZE; i++)
- val += id->name[i];
- return val & mask;
+ return sprintf(buf, "%d\n", ns->ns_nr_unused);
}
+LUSTRE_RO_ATTR(lock_unused_count);
-static unsigned ldlm_res_hop_fid_hash(cfs_hash_t *hs,
- const void *key, unsigned mask)
+static ssize_t lru_size_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
{
- const struct ldlm_res_id *id = key;
- struct lu_fid fid;
- __u32 hash;
- __u32 val;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ __u32 *nr = &ns->ns_max_unused;
- fid.f_seq = id->name[LUSTRE_RES_ID_SEQ_OFF];
- fid.f_oid = (__u32)id->name[LUSTRE_RES_ID_VER_OID_OFF];
- fid.f_ver = (__u32)(id->name[LUSTRE_RES_ID_VER_OID_OFF] >> 32);
+ if (ns_connect_lru_resize(ns))
+ nr = &ns->ns_nr_unused;
+ return sprintf(buf, "%u\n", *nr);
+}
- hash = fid_flatten32(&fid);
- hash += (hash >> 4) + (hash << 12); /* mixing oid and seq */
- if (id->name[LUSTRE_RES_ID_HSH_OFF] != 0) {
- val = id->name[LUSTRE_RES_ID_HSH_OFF];
- hash += (val >> 5) + (val << 11);
- } else {
- val = fid_oid(&fid);
- }
- hash = cfs_hash_long(hash, hs->hs_bkt_bits);
- /* give me another random factor */
- hash -= cfs_hash_long((unsigned long)hs, val % 11 + 3);
+static ssize_t lru_size_store(struct kobject *kobj, struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long tmp;
+ int lru_resize;
+ int err;
+
+ if (strncmp(buffer, "clear", 5) == 0) {
+ CDEBUG(D_DLMTRACE,
+ "dropping all unused locks from namespace %s\n",
+ ldlm_ns_name(ns));
+ if (ns_connect_lru_resize(ns)) {
+ /* Try to cancel all @ns_nr_unused locks. */
+ ldlm_cancel_lru(ns, ns->ns_nr_unused, 0,
+ LDLM_LRU_FLAG_PASSED |
+ LDLM_LRU_FLAG_CLEANUP);
+ } else {
+ tmp = ns->ns_max_unused;
+ ns->ns_max_unused = 0;
+ ldlm_cancel_lru(ns, 0, 0, LDLM_LRU_FLAG_PASSED |
+ LDLM_LRU_FLAG_CLEANUP);
+ ns->ns_max_unused = tmp;
+ }
+ return count;
+ }
+
+ err = kstrtoul(buffer, 10, &tmp);
+ if (err != 0) {
+ CERROR("lru_size: invalid value written\n");
+ return -EINVAL;
+ }
+ lru_resize = (tmp == 0);
+
+ if (ns_connect_lru_resize(ns)) {
+ if (!lru_resize)
+ ns->ns_max_unused = (unsigned int)tmp;
+
+ if (tmp > ns->ns_nr_unused)
+ tmp = ns->ns_nr_unused;
+ tmp = ns->ns_nr_unused - tmp;
+
+ CDEBUG(D_DLMTRACE,
+ "changing namespace %s unused locks from %u to %u\n",
+ ldlm_ns_name(ns), ns->ns_nr_unused,
+ (unsigned int)tmp);
+ ldlm_cancel_lru(ns, tmp, LCF_ASYNC, LDLM_LRU_FLAG_PASSED);
+
+ if (!lru_resize) {
+ CDEBUG(D_DLMTRACE,
+ "disable lru_resize for namespace %s\n",
+ ldlm_ns_name(ns));
+ ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
+ }
+ } else {
+ CDEBUG(D_DLMTRACE,
+ "changing namespace %s max_unused from %u to %u\n",
+ ldlm_ns_name(ns), ns->ns_max_unused,
+ (unsigned int)tmp);
+ ns->ns_max_unused = (unsigned int)tmp;
+ ldlm_cancel_lru(ns, 0, LCF_ASYNC, LDLM_LRU_FLAG_PASSED);
+
+ /* Make sure that LRU resize was originally supported before
+ * turning it on here.
+ */
+ if (lru_resize &&
+ (ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
+ CDEBUG(D_DLMTRACE,
+ "enable lru_resize for namespace %s\n",
+ ldlm_ns_name(ns));
+ ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
+ }
+ }
+
+ return count;
+}
+LUSTRE_RW_ATTR(lru_size);
- hash <<= hs->hs_cur_bits - hs->hs_bkt_bits;
- hash |= ldlm_res_hop_hash(hs, key, CFS_HASH_NBKT(hs) - 1);
+static ssize_t lru_max_age_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
- return hash & mask;
+ return sprintf(buf, "%lld\n", ktime_to_ms(ns->ns_max_age));
}
-static void *ldlm_res_hop_key(cfs_hlist_node_t *hnode)
+static ssize_t lru_max_age_store(struct kobject *kobj, struct attribute *attr,
+ const char *buffer, size_t count)
{
- struct ldlm_resource *res;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ int scale = NSEC_PER_MSEC;
+ unsigned long long tmp;
+ char *buf;
+
+ /* Did the user ask in seconds or milliseconds. Default is in ms */
+ buf = strstr(buffer, "ms");
+ if (!buf) {
+ buf = strchr(buffer, 's');
+ if (buf)
+ scale = NSEC_PER_SEC;
+ }
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- return &res->lr_name;
+ if (buf)
+ *buf = '\0';
+
+ if (kstrtoull(buffer, 10, &tmp))
+ return -EINVAL;
+
+ ns->ns_max_age = ktime_set(0, tmp * scale);
+
+ return count;
}
+LUSTRE_RW_ATTR(lru_max_age);
-static int ldlm_res_hop_keycmp(const void *key, cfs_hlist_node_t *hnode)
+static ssize_t early_lock_cancel_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
{
- struct ldlm_resource *res;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- return ldlm_res_eq((const struct ldlm_res_id *)key,
- (const struct ldlm_res_id *)&res->lr_name);
+ return sprintf(buf, "%d\n", ns_connect_cancelset(ns));
}
-static void *ldlm_res_hop_object(cfs_hlist_node_t *hnode)
+static ssize_t early_lock_cancel_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer,
+ size_t count)
{
- return cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long supp = -1;
+ int rc;
+
+ rc = kstrtoul(buffer, 10, &supp);
+ if (rc < 0)
+ return rc;
+
+ if (supp == 0)
+ ns->ns_connect_flags &= ~OBD_CONNECT_CANCELSET;
+ else if (ns->ns_orig_connect_flags & OBD_CONNECT_CANCELSET)
+ ns->ns_connect_flags |= OBD_CONNECT_CANCELSET;
+ return count;
}
+LUSTRE_RW_ATTR(early_lock_cancel);
-static void ldlm_res_hop_get_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+static ssize_t dirty_age_limit_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
{
- struct ldlm_resource *res;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- ldlm_resource_getref(res);
- LDLM_RESOURCE_ADDREF(res);
+ return sprintf(buf, "%llu\n", ns->ns_dirty_age_limit);
}
-static void ldlm_res_hop_put_locked(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+static ssize_t dirty_age_limit_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer, size_t count)
{
- struct ldlm_resource *res;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long long tmp;
+
+ if (kstrtoull(buffer, 10, &tmp))
+ return -EINVAL;
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- /* cfs_hash_for_each_nolock is the only chance we call it */
- LDLM_RESOURCE_DELREF(res);
- ldlm_resource_putref_locked(res);
+ ns->ns_dirty_age_limit = tmp;
+
+ return count;
}
+LUSTRE_RW_ATTR(dirty_age_limit);
-static void ldlm_res_hop_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+#ifdef HAVE_SERVER_SUPPORT
+static ssize_t ctime_age_limit_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
{
- struct ldlm_resource *res;
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- LDLM_RESOURCE_DELREF(res);
- ldlm_resource_putref(res);
+ return sprintf(buf, "%llu\n", ns->ns_ctime_age_limit);
}
-cfs_hash_ops_t ldlm_ns_hash_ops = {
- .hs_hash = ldlm_res_hop_hash,
- .hs_key = ldlm_res_hop_key,
- .hs_keycmp = ldlm_res_hop_keycmp,
- .hs_keycpy = NULL,
- .hs_object = ldlm_res_hop_object,
- .hs_get = ldlm_res_hop_get_locked,
- .hs_put_locked = ldlm_res_hop_put_locked,
- .hs_put = ldlm_res_hop_put
+static ssize_t ctime_age_limit_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long long tmp;
+
+ if (kstrtoull(buffer, 10, &tmp))
+ return -EINVAL;
+
+ ns->ns_ctime_age_limit = tmp;
+
+ return count;
+}
+LUSTRE_RW_ATTR(ctime_age_limit);
+
+static ssize_t lock_timeouts_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+
+ return sprintf(buf, "%d\n", ns->ns_timeouts);
+}
+LUSTRE_RO_ATTR(lock_timeouts);
+
+static ssize_t max_nolock_bytes_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+
+ return sprintf(buf, "%u\n", ns->ns_max_nolock_size);
+}
+
+static ssize_t max_nolock_bytes_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long tmp;
+ int err;
+
+ err = kstrtoul(buffer, 10, &tmp);
+ if (err != 0)
+ return -EINVAL;
+
+ ns->ns_max_nolock_size = tmp;
+
+ return count;
+}
+LUSTRE_RW_ATTR(max_nolock_bytes);
+
+static ssize_t contention_seconds_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+
+ return sprintf(buf, "%llu\n", ns->ns_contention_time);
+}
+
+static ssize_t contention_seconds_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long long tmp;
+
+ if (kstrtoull(buffer, 10, &tmp))
+ return -EINVAL;
+
+ ns->ns_contention_time = tmp;
+
+ return count;
+}
+LUSTRE_RW_ATTR(contention_seconds);
+
+static ssize_t contended_locks_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+
+ return sprintf(buf, "%u\n", ns->ns_contended_locks);
+}
+
+static ssize_t contended_locks_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long tmp;
+ int err;
+
+ err = kstrtoul(buffer, 10, &tmp);
+ if (err != 0)
+ return -EINVAL;
+
+ ns->ns_contended_locks = tmp;
+
+ return count;
+}
+LUSTRE_RW_ATTR(contended_locks);
+
+static ssize_t max_parallel_ast_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+
+ return sprintf(buf, "%u\n", ns->ns_max_parallel_ast);
+}
+
+static ssize_t max_parallel_ast_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buffer, size_t count)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ unsigned long tmp;
+ int err;
+
+ err = kstrtoul(buffer, 10, &tmp);
+ if (err != 0)
+ return -EINVAL;
+
+ ns->ns_max_parallel_ast = tmp;
+
+ return count;
+}
+LUSTRE_RW_ATTR(max_parallel_ast);
+
+#endif /* HAVE_SERVER_SUPPORT */
+
+/* These are for namespaces in /sys/fs/lustre/ldlm/namespaces/ */
+static struct attribute *ldlm_ns_attrs[] = {
+ &lustre_attr_resource_count.attr,
+ &lustre_attr_lock_count.attr,
+ &lustre_attr_lock_unused_count.attr,
+ &lustre_attr_lru_size.attr,
+ &lustre_attr_lru_max_age.attr,
+ &lustre_attr_early_lock_cancel.attr,
+ &lustre_attr_dirty_age_limit.attr,
+#ifdef HAVE_SERVER_SUPPORT
+ &lustre_attr_ctime_age_limit.attr,
+ &lustre_attr_lock_timeouts.attr,
+ &lustre_attr_max_nolock_bytes.attr,
+ &lustre_attr_contention_seconds.attr,
+ &lustre_attr_contended_locks.attr,
+ &lustre_attr_max_parallel_ast.attr,
+#endif
+ NULL,
};
-cfs_hash_ops_t ldlm_ns_fid_hash_ops = {
- .hs_hash = ldlm_res_hop_fid_hash,
- .hs_key = ldlm_res_hop_key,
- .hs_keycmp = ldlm_res_hop_keycmp,
- .hs_keycpy = NULL,
- .hs_object = ldlm_res_hop_object,
- .hs_get = ldlm_res_hop_get_locked,
- .hs_put_locked = ldlm_res_hop_put_locked,
- .hs_put = ldlm_res_hop_put
+static void ldlm_ns_release(struct kobject *kobj)
+{
+ struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+ ns_kobj);
+ complete(&ns->ns_kobj_unregister);
+}
+
+static struct kobj_type ldlm_ns_ktype = {
+ .default_attrs = ldlm_ns_attrs,
+ .sysfs_ops = &lustre_sysfs_ops,
+ .release = ldlm_ns_release,
};
-typedef struct {
- ldlm_ns_type_t nsd_type;
- /** hash bucket bits */
- unsigned nsd_bkt_bits;
- /** hash bits */
- unsigned nsd_all_bits;
- /** hash operations */
- cfs_hash_ops_t *nsd_hops;
+static void ldlm_namespace_debugfs_unregister(struct ldlm_namespace *ns)
+{
+ if (IS_ERR_OR_NULL(ns->ns_debugfs_entry))
+ CERROR("dlm namespace %s has no procfs dir?\n",
+ ldlm_ns_name(ns));
+ else
+ ldebugfs_remove(&ns->ns_debugfs_entry);
+
+ if (ns->ns_stats != NULL)
+ lprocfs_free_stats(&ns->ns_stats);
+}
+
+void ldlm_namespace_sysfs_unregister(struct ldlm_namespace *ns)
+{
+ kobject_put(&ns->ns_kobj);
+ wait_for_completion(&ns->ns_kobj_unregister);
+}
+
+int ldlm_namespace_sysfs_register(struct ldlm_namespace *ns)
+{
+ int err;
+
+ ns->ns_kobj.kset = ldlm_ns_kset;
+ init_completion(&ns->ns_kobj_unregister);
+ err = kobject_init_and_add(&ns->ns_kobj, &ldlm_ns_ktype, NULL,
+ "%s", ldlm_ns_name(ns));
+
+ ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
+ if (!ns->ns_stats) {
+ kobject_put(&ns->ns_kobj);
+ return -ENOMEM;
+ }
+
+ lprocfs_counter_init(ns->ns_stats, LDLM_NSS_LOCKS,
+ LPROCFS_CNTR_AVGMINMAX, "locks", "locks");
+
+ return err;
+}
+
+static int ldlm_namespace_debugfs_register(struct ldlm_namespace *ns)
+{
+ struct dentry *ns_entry;
+
+ if (!IS_ERR_OR_NULL(ns->ns_debugfs_entry)) {
+ ns_entry = ns->ns_debugfs_entry;
+ } else {
+ ns_entry = debugfs_create_dir(ldlm_ns_name(ns),
+ ldlm_ns_debugfs_dir);
+ if (!ns_entry)
+ return -ENOMEM;
+ ns->ns_debugfs_entry = ns_entry;
+ }
+
+ return 0;
+}
+#undef MAX_STRING_SIZE
+
+static unsigned ldlm_res_hop_hash(struct cfs_hash *hs,
+ const void *key, unsigned int mask)
+{
+ const struct ldlm_res_id *id = key;
+ unsigned int val = 0;
+ unsigned int i;
+
+ for (i = 0; i < RES_NAME_SIZE; i++)
+ val += id->name[i];
+ return val & mask;
+}
+
+static unsigned ldlm_res_hop_fid_hash(struct cfs_hash *hs,
+ const void *key, unsigned mask)
+{
+ const struct ldlm_res_id *id = key;
+ struct lu_fid fid;
+ __u32 hash;
+ __u32 val;
+
+ fid.f_seq = id->name[LUSTRE_RES_ID_SEQ_OFF];
+ fid.f_oid = (__u32)id->name[LUSTRE_RES_ID_VER_OID_OFF];
+ fid.f_ver = (__u32)(id->name[LUSTRE_RES_ID_VER_OID_OFF] >> 32);
+
+ hash = fid_flatten32(&fid);
+ hash += (hash >> 4) + (hash << 12); /* mixing oid and seq */
+ if (id->name[LUSTRE_RES_ID_HSH_OFF] != 0) {
+ val = id->name[LUSTRE_RES_ID_HSH_OFF];
+ hash += (val >> 5) + (val << 11);
+ } else {
+ val = fid_oid(&fid);
+ }
+ hash = hash_long(hash, hs->hs_bkt_bits);
+ /* give me another random factor */
+ hash -= hash_long((unsigned long)hs, val % 11 + 3);
+
+ hash <<= hs->hs_cur_bits - hs->hs_bkt_bits;
+ hash |= ldlm_res_hop_hash(hs, key, CFS_HASH_NBKT(hs) - 1);
+
+ return hash & mask;
+}
+
+static void *ldlm_res_hop_key(struct hlist_node *hnode)
+{
+ struct ldlm_resource *res;
+
+ res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
+ return &res->lr_name;
+}
+
+static int ldlm_res_hop_keycmp(const void *key, struct hlist_node *hnode)
+{
+ struct ldlm_resource *res;
+
+ res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
+ return ldlm_res_eq((const struct ldlm_res_id *)key,
+ (const struct ldlm_res_id *)&res->lr_name);
+}
+
+static void *ldlm_res_hop_object(struct hlist_node *hnode)
+{
+ return hlist_entry(hnode, struct ldlm_resource, lr_hash);
+}
+
+static void
+ldlm_res_hop_get_locked(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct ldlm_resource *res;
+
+ res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
+ ldlm_resource_getref(res);
+}
+
+static void ldlm_res_hop_put(struct cfs_hash *hs, struct hlist_node *hnode)
+{
+ struct ldlm_resource *res;
+
+ res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
+ ldlm_resource_putref(res);
+}
+
+static struct cfs_hash_ops ldlm_ns_hash_ops = {
+ .hs_hash = ldlm_res_hop_hash,
+ .hs_key = ldlm_res_hop_key,
+ .hs_keycmp = ldlm_res_hop_keycmp,
+ .hs_keycpy = NULL,
+ .hs_object = ldlm_res_hop_object,
+ .hs_get = ldlm_res_hop_get_locked,
+ .hs_put = ldlm_res_hop_put
+};
+
+static struct cfs_hash_ops ldlm_ns_fid_hash_ops = {
+ .hs_hash = ldlm_res_hop_fid_hash,
+ .hs_key = ldlm_res_hop_key,
+ .hs_keycmp = ldlm_res_hop_keycmp,
+ .hs_keycpy = NULL,
+ .hs_object = ldlm_res_hop_object,
+ .hs_get = ldlm_res_hop_get_locked,
+ .hs_put = ldlm_res_hop_put
+};
+
+typedef struct ldlm_ns_hash_def {
+ enum ldlm_ns_type nsd_type;
+ /** hash bucket bits */
+ unsigned nsd_bkt_bits;
+ /** hash bits */
+ unsigned nsd_all_bits;
+ /** hash operations */
+ struct cfs_hash_ops *nsd_hops;
} ldlm_ns_hash_def_t;
-ldlm_ns_hash_def_t ldlm_ns_hash_defs[] =
-{
- {
- .nsd_type = LDLM_NS_TYPE_MDC,
- .nsd_bkt_bits = 11,
- .nsd_all_bits = 16,
- .nsd_hops = &ldlm_ns_fid_hash_ops,
- },
- {
- .nsd_type = LDLM_NS_TYPE_MDT,
- .nsd_bkt_bits = 14,
- .nsd_all_bits = 21,
- .nsd_hops = &ldlm_ns_fid_hash_ops,
- },
- {
- .nsd_type = LDLM_NS_TYPE_OSC,
- .nsd_bkt_bits = 8,
- .nsd_all_bits = 12,
- .nsd_hops = &ldlm_ns_hash_ops,
- },
- {
- .nsd_type = LDLM_NS_TYPE_OST,
- .nsd_bkt_bits = 11,
- .nsd_all_bits = 17,
- .nsd_hops = &ldlm_ns_hash_ops,
- },
- {
- .nsd_type = LDLM_NS_TYPE_MGC,
- .nsd_bkt_bits = 4,
- .nsd_all_bits = 4,
- .nsd_hops = &ldlm_ns_hash_ops,
- },
- {
- .nsd_type = LDLM_NS_TYPE_MGT,
- .nsd_bkt_bits = 4,
- .nsd_all_bits = 4,
- .nsd_hops = &ldlm_ns_hash_ops,
- },
- {
- .nsd_type = LDLM_NS_TYPE_UNKNOWN,
- },
+static struct ldlm_ns_hash_def ldlm_ns_hash_defs[] =
+{
+ {
+ .nsd_type = LDLM_NS_TYPE_MDC,
+ .nsd_bkt_bits = 11,
+ .nsd_all_bits = 16,
+ .nsd_hops = &ldlm_ns_fid_hash_ops,
+ },
+ {
+ .nsd_type = LDLM_NS_TYPE_MDT,
+ .nsd_bkt_bits = 14,
+ .nsd_all_bits = 21,
+ .nsd_hops = &ldlm_ns_fid_hash_ops,
+ },
+ {
+ .nsd_type = LDLM_NS_TYPE_OSC,
+ .nsd_bkt_bits = 8,
+ .nsd_all_bits = 12,
+ .nsd_hops = &ldlm_ns_hash_ops,
+ },
+ {
+ .nsd_type = LDLM_NS_TYPE_OST,
+ .nsd_bkt_bits = 11,
+ .nsd_all_bits = 17,
+ .nsd_hops = &ldlm_ns_hash_ops,
+ },
+ {
+ .nsd_type = LDLM_NS_TYPE_MGC,
+ .nsd_bkt_bits = 4,
+ .nsd_all_bits = 4,
+ .nsd_hops = &ldlm_ns_hash_ops,
+ },
+ {
+ .nsd_type = LDLM_NS_TYPE_MGT,
+ .nsd_bkt_bits = 4,
+ .nsd_all_bits = 4,
+ .nsd_hops = &ldlm_ns_hash_ops,
+ },
+ {
+ .nsd_type = LDLM_NS_TYPE_UNKNOWN,
+ },
};
+/**
+ * Create and initialize new empty namespace.
+ */
struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
- ldlm_side_t client,
- ldlm_appetite_t apt,
- ldlm_ns_type_t ns_type)
-{
- struct ldlm_namespace *ns = NULL;
- struct ldlm_ns_bucket *nsb;
- ldlm_ns_hash_def_t *nsd;
- cfs_hash_bd_t bd;
- int idx;
- int rc;
- ENTRY;
-
- LASSERT(obd != NULL);
-
- rc = ldlm_get_ref();
- if (rc) {
- CERROR("ldlm_get_ref failed: %d\n", rc);
- RETURN(NULL);
- }
-
- for (idx = 0;;idx++) {
- nsd = &ldlm_ns_hash_defs[idx];
- if (nsd->nsd_type == LDLM_NS_TYPE_UNKNOWN) {
- CERROR("Unknown type %d for ns %s\n", ns_type, name);
- GOTO(out_ref, NULL);
- }
-
- if (nsd->nsd_type == ns_type)
- break;
- }
-
- OBD_ALLOC_PTR(ns);
- if (!ns)
- GOTO(out_ref, NULL);
-
- ns->ns_rs_hash = cfs_hash_create(name,
- nsd->nsd_all_bits, nsd->nsd_all_bits,
- nsd->nsd_bkt_bits, sizeof(*nsb),
- CFS_HASH_MIN_THETA,
- CFS_HASH_MAX_THETA,
- nsd->nsd_hops,
- CFS_HASH_DEPTH |
- CFS_HASH_BIGNAME |
- CFS_HASH_SPIN_BKTLOCK |
- CFS_HASH_NO_ITEMREF);
- if (ns->ns_rs_hash == NULL)
- GOTO(out_ns, NULL);
-
- cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, idx) {
- nsb = cfs_hash_bd_extra_get(ns->ns_rs_hash, &bd);
- at_init(&nsb->nsb_at_estimate, ldlm_enqueue_min, 0);
- nsb->nsb_namespace = ns;
- }
-
- ns->ns_obd = obd;
- ns->ns_appetite = apt;
- ns->ns_client = client;
-
- CFS_INIT_LIST_HEAD(&ns->ns_list_chain);
- CFS_INIT_LIST_HEAD(&ns->ns_unused_list);
- cfs_spin_lock_init(&ns->ns_lock);
- cfs_atomic_set(&ns->ns_bref, 0);
- cfs_waitq_init(&ns->ns_waitq);
-
- ns->ns_max_nolock_size = NS_DEFAULT_MAX_NOLOCK_BYTES;
- ns->ns_contention_time = NS_DEFAULT_CONTENTION_SECONDS;
- ns->ns_contended_locks = NS_DEFAULT_CONTENDED_LOCKS;
-
- ns->ns_max_parallel_ast = LDLM_DEFAULT_PARALLEL_AST_LIMIT;
- ns->ns_nr_unused = 0;
- ns->ns_max_unused = LDLM_DEFAULT_LRU_SIZE;
- ns->ns_max_age = LDLM_DEFAULT_MAX_ALIVE;
- ns->ns_ctime_age_limit = LDLM_CTIME_AGE_LIMIT;
- ns->ns_timeouts = 0;
- ns->ns_orig_connect_flags = 0;
- ns->ns_connect_flags = 0;
- ns->ns_stopping = 0;
- rc = ldlm_namespace_proc_register(ns);
- if (rc != 0) {
- CERROR("Can't initialize ns proc, rc %d\n", rc);
- GOTO(out_hash, rc);
- }
-
- idx = cfs_atomic_read(ldlm_namespace_nr(client));
- rc = ldlm_pool_init(&ns->ns_pool, ns, idx, client);
- if (rc) {
- CERROR("Can't initialize lock pool, rc %d\n", rc);
- GOTO(out_proc, rc);
- }
-
- ldlm_namespace_register(ns, client);
- RETURN(ns);
+ enum ldlm_side client,
+ enum ldlm_appetite apt,
+ enum ldlm_ns_type ns_type)
+{
+ struct ldlm_namespace *ns = NULL;
+ struct ldlm_ns_bucket *nsb;
+ struct ldlm_ns_hash_def *nsd;
+ struct cfs_hash_bd bd;
+ int idx;
+ int rc;
+
+ ENTRY;
+ LASSERT(obd != NULL);
+
+ rc = ldlm_get_ref();
+ if (rc) {
+ CERROR("ldlm_get_ref failed: %d\n", rc);
+ RETURN(NULL);
+ }
+
+ for (idx = 0; ; idx++) {
+ nsd = &ldlm_ns_hash_defs[idx];
+ if (nsd->nsd_type == LDLM_NS_TYPE_UNKNOWN) {
+ CERROR("Unknown type %d for ns %s\n", ns_type, name);
+ GOTO(out_ref, NULL);
+ }
+
+ if (nsd->nsd_type == ns_type)
+ break;
+ }
+
+ OBD_ALLOC_PTR(ns);
+ if (!ns)
+ GOTO(out_ref, NULL);
+
+ ns->ns_rs_hash = cfs_hash_create(name,
+ nsd->nsd_all_bits, nsd->nsd_all_bits,
+ nsd->nsd_bkt_bits, sizeof(*nsb),
+ CFS_HASH_MIN_THETA,
+ CFS_HASH_MAX_THETA,
+ nsd->nsd_hops,
+ CFS_HASH_DEPTH |
+ CFS_HASH_BIGNAME |
+ CFS_HASH_SPIN_BKTLOCK |
+ CFS_HASH_NO_ITEMREF);
+ if (ns->ns_rs_hash == NULL)
+ GOTO(out_ns, NULL);
+
+ cfs_hash_for_each_bucket(ns->ns_rs_hash, &bd, idx) {
+ nsb = cfs_hash_bd_extra_get(ns->ns_rs_hash, &bd);
+ at_init(&nsb->nsb_at_estimate, ldlm_enqueue_min, 0);
+ nsb->nsb_namespace = ns;
+ nsb->nsb_reclaim_start = 0;
+ }
+
+ ns->ns_obd = obd;
+ ns->ns_appetite = apt;
+ ns->ns_client = client;
+ ns->ns_name = kstrdup(name, GFP_KERNEL);
+ if (!ns->ns_name)
+ goto out_hash;
+
+ INIT_LIST_HEAD(&ns->ns_list_chain);
+ INIT_LIST_HEAD(&ns->ns_unused_list);
+ spin_lock_init(&ns->ns_lock);
+ atomic_set(&ns->ns_bref, 0);
+ init_waitqueue_head(&ns->ns_waitq);
+
+ ns->ns_max_nolock_size = NS_DEFAULT_MAX_NOLOCK_BYTES;
+ ns->ns_contention_time = NS_DEFAULT_CONTENTION_SECONDS;
+ ns->ns_contended_locks = NS_DEFAULT_CONTENDED_LOCKS;
+
+ ns->ns_max_parallel_ast = LDLM_DEFAULT_PARALLEL_AST_LIMIT;
+ ns->ns_nr_unused = 0;
+ ns->ns_max_unused = LDLM_DEFAULT_LRU_SIZE;
+ ns->ns_max_age = ktime_set(LDLM_DEFAULT_MAX_ALIVE, 0);
+ ns->ns_ctime_age_limit = LDLM_CTIME_AGE_LIMIT;
+ ns->ns_dirty_age_limit = LDLM_DIRTY_AGE_LIMIT;
+ ns->ns_timeouts = 0;
+ ns->ns_orig_connect_flags = 0;
+ ns->ns_connect_flags = 0;
+ ns->ns_stopping = 0;
+ ns->ns_reclaim_start = 0;
+ ns->ns_last_pos = &ns->ns_unused_list;
+
+ rc = ldlm_namespace_sysfs_register(ns);
+ if (rc) {
+ CERROR("Can't initialize ns sysfs, rc %d\n", rc);
+ GOTO(out_hash, rc);
+ }
+
+ rc = ldlm_namespace_debugfs_register(ns);
+ if (rc) {
+ CERROR("Can't initialize ns proc, rc %d\n", rc);
+ GOTO(out_sysfs, rc);
+ }
+
+ idx = ldlm_namespace_nr_read(client);
+ rc = ldlm_pool_init(&ns->ns_pool, ns, idx, client);
+ if (rc) {
+ CERROR("Can't initialize lock pool, rc %d\n", rc);
+ GOTO(out_proc, rc);
+ }
+
+ ldlm_namespace_register(ns, client);
+ RETURN(ns);
out_proc:
- ldlm_namespace_proc_unregister(ns);
- ldlm_namespace_cleanup(ns, 0);
+ ldlm_namespace_debugfs_unregister(ns);
+out_sysfs:
+ ldlm_namespace_sysfs_unregister(ns);
+ ldlm_namespace_cleanup(ns, 0);
out_hash:
- cfs_hash_putref(ns->ns_rs_hash);
+ kfree(ns->ns_name);
+ cfs_hash_putref(ns->ns_rs_hash);
out_ns:
OBD_FREE_PTR(ns);
out_ref:
- ldlm_put_ref();
- RETURN(NULL);
-}
-
-extern struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
-
-/* If flags contains FL_LOCAL_ONLY, don't try to tell the server, just cleanup.
- * This is currently only used for recovery, and we make certain assumptions
- * as a result--notably, that we shouldn't cancel locks with refs. -phil */
-static void cleanup_resource(struct ldlm_resource *res, cfs_list_t *q,
- int flags)
-{
- cfs_list_t *tmp;
- int rc = 0, client = ns_is_client(ldlm_res_to_ns(res));
- int local_only = (flags & LDLM_FL_LOCAL_ONLY);
-
- do {
- struct ldlm_lock *lock = NULL;
-
- /* first, we look for non-cleaned-yet lock
- * all cleaned locks are marked by CLEANED flag */
- lock_res(res);
- cfs_list_for_each(tmp, q) {
- lock = cfs_list_entry(tmp, struct ldlm_lock,
- l_res_link);
- if (lock->l_flags & LDLM_FL_CLEANED) {
- lock = NULL;
- continue;
- }
- LDLM_LOCK_GET(lock);
- lock->l_flags |= LDLM_FL_CLEANED;
- break;
- }
-
- if (lock == NULL) {
- unlock_res(res);
- break;
- }
-
- /* Set CBPENDING so nothing in the cancellation path
- * can match this lock */
- lock->l_flags |= LDLM_FL_CBPENDING;
- lock->l_flags |= LDLM_FL_FAILED;
- lock->l_flags |= flags;
-
- /* ... without sending a CANCEL message for local_only. */
- if (local_only)
- lock->l_flags |= LDLM_FL_LOCAL_ONLY;
-
- if (local_only && (lock->l_readers || lock->l_writers)) {
- /* This is a little bit gross, but much better than the
- * alternative: pretend that we got a blocking AST from
- * the server, so that when the lock is decref'd, it
- * will go away ... */
- unlock_res(res);
- LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
- if (lock->l_completion_ast)
- lock->l_completion_ast(lock, 0, NULL);
- LDLM_LOCK_RELEASE(lock);
- continue;
- }
-
- if (client) {
- struct lustre_handle lockh;
-
- unlock_res(res);
- ldlm_lock2handle(lock, &lockh);
- rc = ldlm_cli_cancel(&lockh);
- if (rc)
- CERROR("ldlm_cli_cancel: %d\n", rc);
- } else {
- ldlm_resource_unlink_lock(lock);
- unlock_res(res);
- LDLM_DEBUG(lock, "Freeing a lock still held by a "
- "client node");
- ldlm_lock_destroy(lock);
- }
- LDLM_LOCK_RELEASE(lock);
- } while (1);
-}
-
-static int ldlm_resource_clean(cfs_hash_t *hs, cfs_hash_bd_t *bd,
- cfs_hlist_node_t *hnode, void *arg)
-{
- struct ldlm_resource *res = cfs_hash_object(hs, hnode);
- int flags = (int)(unsigned long)arg;
-
- cleanup_resource(res, &res->lr_granted, flags);
- cleanup_resource(res, &res->lr_converting, flags);
- cleanup_resource(res, &res->lr_waiting, flags);
-
- return 0;
-}
-
-static int ldlm_resource_complain(cfs_hash_t *hs, cfs_hash_bd_t *bd,
- cfs_hlist_node_t *hnode, void *arg)
-{
- struct ldlm_resource *res = cfs_hash_object(hs, hnode);
-
- CERROR("Namespace %s resource refcount nonzero "
- "(%d) after lock cleanup; forcing "
- "cleanup.\n",
- ldlm_ns_name(ldlm_res_to_ns(res)),
- cfs_atomic_read(&res->lr_refcount) - 1);
-
- CERROR("Resource: %p ("LPU64"/"LPU64"/"LPU64"/"
- LPU64") (rc: %d)\n", res,
- res->lr_name.name[0], res->lr_name.name[1],
- res->lr_name.name[2], res->lr_name.name[3],
- cfs_atomic_read(&res->lr_refcount) - 1);
- return 0;
-}
-
-int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags)
-{
- if (ns == NULL) {
- CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
- return ELDLM_OK;
- }
-
- cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_clean,
- (void *)(unsigned long)flags);
- cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_complain, NULL);
- return ELDLM_OK;
+ ldlm_put_ref();
+ RETURN(NULL);
+}
+EXPORT_SYMBOL(ldlm_namespace_new);
+
+/**
+ * Cancel and destroy all locks on a resource.
+ *
+ * If flags contains FL_LOCAL_ONLY, don't try to tell the server, just
+ * clean up. This is currently only used for recovery, and we make
+ * certain assumptions as a result--notably, that we shouldn't cancel
+ * locks with refs.
+ */
+static void cleanup_resource(struct ldlm_resource *res, struct list_head *q,
+ __u64 flags)
+{
+ struct list_head *tmp;
+ int rc = 0, client = ns_is_client(ldlm_res_to_ns(res));
+ bool local_only = !!(flags & LDLM_FL_LOCAL_ONLY);
+
+ do {
+ struct ldlm_lock *lock = NULL;
+
+ /* First, we look for non-cleaned-yet lock
+ * all cleaned locks are marked by CLEANED flag. */
+ lock_res(res);
+ list_for_each(tmp, q) {
+ lock = list_entry(tmp, struct ldlm_lock,
+ l_res_link);
+ if (ldlm_is_cleaned(lock)) {
+ lock = NULL;
+ continue;
+ }
+ LDLM_LOCK_GET(lock);
+ ldlm_set_cleaned(lock);
+ break;
+ }
+
+ if (lock == NULL) {
+ unlock_res(res);
+ break;
+ }
+
+ /* Set CBPENDING so nothing in the cancellation path
+ * can match this lock. */
+ ldlm_set_cbpending(lock);
+ ldlm_set_failed(lock);
+ lock->l_flags |= flags;
+
+ /* ... without sending a CANCEL message for local_only. */
+ if (local_only)
+ ldlm_set_local_only(lock);
+
+ if (local_only && (lock->l_readers || lock->l_writers)) {
+ /*
+ * This is a little bit gross, but much better than the
+ * alternative: pretend that we got a blocking AST from
+ * the server, so that when the lock is decref'd, it
+ * will go away ...
+ */
+ unlock_res(res);
+ LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
+ if (lock->l_flags & LDLM_FL_FAIL_LOC) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(4));
+ set_current_state(TASK_RUNNING);
+ }
+ if (lock->l_completion_ast)
+ lock->l_completion_ast(lock,
+ LDLM_FL_FAILED, NULL);
+ LDLM_LOCK_RELEASE(lock);
+ continue;
+ }
+
+ if (client) {
+ struct lustre_handle lockh;
+
+ unlock_res(res);
+ ldlm_lock2handle(lock, &lockh);
+ rc = ldlm_cli_cancel(&lockh, LCF_LOCAL);
+ if (rc)
+ CERROR("ldlm_cli_cancel: %d\n", rc);
+ } else {
+ unlock_res(res);
+ LDLM_DEBUG(lock,
+ "Freeing a lock still held by a client node");
+ ldlm_lock_cancel(lock);
+ }
+ LDLM_LOCK_RELEASE(lock);
+ } while (1);
+}
+
+static int ldlm_resource_clean(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *arg)
+{
+ struct ldlm_resource *res = cfs_hash_object(hs, hnode);
+ __u64 flags = *(__u64 *)arg;
+
+ cleanup_resource(res, &res->lr_granted, flags);
+ cleanup_resource(res, &res->lr_waiting, flags);
+
+ return 0;
+}
+
+static int ldlm_resource_complain(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *arg)
+{
+ struct ldlm_resource *res = cfs_hash_object(hs, hnode);
+
+ lock_res(res);
+ CERROR("%s: namespace resource "DLDLMRES" (%p) refcount nonzero "
+ "(%d) after lock cleanup; forcing cleanup.\n",
+ ldlm_ns_name(ldlm_res_to_ns(res)), PLDLMRES(res), res,
+ atomic_read(&res->lr_refcount) - 1);
+
+ /* Use D_NETERROR since it is in the default mask */
+ ldlm_resource_dump(D_NETERROR, res);
+ unlock_res(res);
+ return 0;
+}
+
+/**
+ * Cancel and destroy all locks in the namespace.
+ *
+ * Typically used during evictions when server notified client that it was
+ * evicted and all of its state needs to be destroyed.
+ * Also used during shutdown.
+ */
+int ldlm_namespace_cleanup(struct ldlm_namespace *ns, __u64 flags)
+{
+ if (ns == NULL) {
+ CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
+ return ELDLM_OK;
+ }
+
+ cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_clean,
+ &flags, 0);
+ cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_complain,
+ NULL, 0);
+ return ELDLM_OK;
}
+EXPORT_SYMBOL(ldlm_namespace_cleanup);
+/**
+ * Attempts to free namespace.
+ *
+ * Only used when namespace goes away, like during an unmount.
+ */
static int __ldlm_namespace_free(struct ldlm_namespace *ns, int force)
{
- ENTRY;
+ ENTRY;
- /* At shutdown time, don't call the cancellation callback */
- ldlm_namespace_cleanup(ns, force ? LDLM_FL_LOCAL_ONLY : 0);
+ /* At shutdown time, don't call the cancellation callback */
+ ldlm_namespace_cleanup(ns, force ? LDLM_FL_LOCAL_ONLY : 0);
- if (cfs_atomic_read(&ns->ns_bref) > 0) {
- struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
- int rc;
- CDEBUG(D_DLMTRACE,
- "dlm namespace %s free waiting on refcount %d\n",
- ldlm_ns_name(ns), cfs_atomic_read(&ns->ns_bref));
+ if (atomic_read(&ns->ns_bref) > 0) {
+ struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
+ int rc;
+ CDEBUG(D_DLMTRACE,
+ "dlm namespace %s free waiting on refcount %d\n",
+ ldlm_ns_name(ns), atomic_read(&ns->ns_bref));
force_wait:
- if (force)
- lwi = LWI_TIMEOUT(obd_timeout * CFS_HZ / 4, NULL, NULL);
-
- rc = l_wait_event(ns->ns_waitq,
- cfs_atomic_read(&ns->ns_bref) == 0, &lwi);
-
- /* Forced cleanups should be able to reclaim all references,
- * so it's safe to wait forever... we can't leak locks... */
- if (force && rc == -ETIMEDOUT) {
- LCONSOLE_ERROR("Forced cleanup waiting for %s "
- "namespace with %d resources in use, "
- "(rc=%d)\n", ldlm_ns_name(ns),
- cfs_atomic_read(&ns->ns_bref), rc);
- GOTO(force_wait, rc);
- }
-
- if (cfs_atomic_read(&ns->ns_bref)) {
- LCONSOLE_ERROR("Cleanup waiting for %s namespace "
- "with %d resources in use, (rc=%d)\n",
- ldlm_ns_name(ns),
- cfs_atomic_read(&ns->ns_bref), rc);
- RETURN(ELDLM_NAMESPACE_EXISTS);
- }
- CDEBUG(D_DLMTRACE, "dlm namespace %s free done waiting\n",
- ldlm_ns_name(ns));
- }
-
- RETURN(ELDLM_OK);
+ if (force)
+ lwi = LWI_TIMEOUT(cfs_time_seconds(1) / 4,
+ NULL, NULL);
+
+ rc = l_wait_event(ns->ns_waitq,
+ atomic_read(&ns->ns_bref) == 0, &lwi);
+
+ /* Forced cleanups should be able to reclaim all references,
+ * so it's safe to wait forever... we can't leak locks... */
+ if (force && rc == -ETIMEDOUT) {
+ LCONSOLE_ERROR("Forced cleanup waiting for %s "
+ "namespace with %d resources in use, "
+ "(rc=%d)\n", ldlm_ns_name(ns),
+ atomic_read(&ns->ns_bref), rc);
+ GOTO(force_wait, rc);
+ }
+
+ if (atomic_read(&ns->ns_bref)) {
+ LCONSOLE_ERROR("Cleanup waiting for %s namespace "
+ "with %d resources in use, (rc=%d)\n",
+ ldlm_ns_name(ns),
+ atomic_read(&ns->ns_bref), rc);
+ RETURN(ELDLM_NAMESPACE_EXISTS);
+ }
+ CDEBUG(D_DLMTRACE, "dlm namespace %s free done waiting\n",
+ ldlm_ns_name(ns));
+ }
+
+ RETURN(ELDLM_OK);
}
/**
- * Performs various cleanups for passed \a ns to make it drop refc and be ready
- * for freeing. Waits for refc == 0.
+ * Performs various cleanups for passed \a ns to make it drop refc and be
+ * ready for freeing. Waits for refc == 0.
*
* The following is done:
- * (0) Unregister \a ns from its list to make inaccessible for potential users
- * like pools thread and others;
+ * (0) Unregister \a ns from its list to make inaccessible for potential
+ * users like pools thread and others;
* (1) Clear all locks in \a ns.
*/
void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
struct obd_import *imp,
int force)
{
- int rc;
- ENTRY;
- if (!ns) {
- EXIT;
- return;
- }
-
- cfs_spin_lock(&ns->ns_lock);
- ns->ns_stopping = 1;
- cfs_spin_unlock(&ns->ns_lock);
-
- /*
- * Can fail with -EINTR when force == 0 in which case try harder.
- */
- rc = __ldlm_namespace_free(ns, force);
- if (rc != ELDLM_OK) {
- if (imp) {
- ptlrpc_disconnect_import(imp, 0);
- ptlrpc_invalidate_import(imp);
- }
-
- /*
- * With all requests dropped and the import inactive
- * we are gaurenteed all reference will be dropped.
- */
- rc = __ldlm_namespace_free(ns, 1);
- LASSERT(rc == 0);
- }
- EXIT;
+ int rc;
+
+ ENTRY;
+ if (!ns) {
+ EXIT;
+ return;
+ }
+
+ spin_lock(&ns->ns_lock);
+ ns->ns_stopping = 1;
+ spin_unlock(&ns->ns_lock);
+
+ /*
+ * Can fail with -EINTR when force == 0 in which case try harder.
+ */
+ rc = __ldlm_namespace_free(ns, force);
+ if (rc != ELDLM_OK) {
+ if (imp) {
+ ptlrpc_disconnect_import(imp, 0);
+ ptlrpc_invalidate_import(imp);
+ }
+
+ /*
+ * With all requests dropped and the import inactive
+ * we are gaurenteed all reference will be dropped.
+ */
+ rc = __ldlm_namespace_free(ns, 1);
+ LASSERT(rc == 0);
+ }
+ EXIT;
}
+EXPORT_SYMBOL(ldlm_namespace_free_prior);
/**
- * Performs freeing memory structures related to \a ns. This is only done when
- * ldlm_namespce_free_prior() successfully removed all resources referencing
- * \a ns and its refc == 0.
+ * Performs freeing memory structures related to \a ns. This is only done
+ * when ldlm_namespce_free_prior() successfully removed all resources
+ * referencing \a ns and its refc == 0.
*/
void ldlm_namespace_free_post(struct ldlm_namespace *ns)
{
- ENTRY;
- if (!ns) {
- EXIT;
- return;
- }
-
-
- /*
- * Make sure that nobody can find this ns in its list.
- */
- ldlm_namespace_unregister(ns, ns->ns_client);
- /*
- * Fini pool _before_ parent proc dir is removed. This is important as
- * ldlm_pool_fini() removes own proc dir which is child to @dir. Removing
- * it after @dir may cause oops.
- */
- ldlm_pool_fini(&ns->ns_pool);
-
- ldlm_namespace_proc_unregister(ns);
- cfs_hash_putref(ns->ns_rs_hash);
- /*
- * Namespace \a ns should be not on list in this time, otherwise this
- * will cause issues realted to using freed \a ns in pools thread.
- */
- LASSERT(cfs_list_empty(&ns->ns_list_chain));
- OBD_FREE_PTR(ns);
- ldlm_put_ref();
- EXIT;
+ ENTRY;
+ if (!ns) {
+ EXIT;
+ return;
+ }
+
+ /* Make sure that nobody can find this ns in its list. */
+ ldlm_namespace_unregister(ns, ns->ns_client);
+ /* Fini pool _before_ parent proc dir is removed. This is important as
+ * ldlm_pool_fini() removes own proc dir which is child to @dir.
+ * Removing it after @dir may cause oops. */
+ ldlm_pool_fini(&ns->ns_pool);
+
+ ldlm_namespace_debugfs_unregister(ns);
+ ldlm_namespace_sysfs_unregister(ns);
+ cfs_hash_putref(ns->ns_rs_hash);
+ kfree(ns->ns_name);
+ /* Namespace \a ns should be not on list at this time, otherwise
+ * this will cause issues related to using freed \a ns in poold
+ * thread.
+ */
+ LASSERT(list_empty(&ns->ns_list_chain));
+ OBD_FREE_PTR(ns);
+ ldlm_put_ref();
+ EXIT;
}
+EXPORT_SYMBOL(ldlm_namespace_free_post);
-
-/* Cleanup the resource, and free namespace.
+/**
+ * Cleanup the resource, and free namespace.
* bug 12864:
* Deadlock issue:
* proc1: destroy import
* held.
*/
void ldlm_namespace_free(struct ldlm_namespace *ns,
- struct obd_import *imp,
- int force)
+ struct obd_import *imp,
+ int force)
{
- ldlm_namespace_free_prior(ns, imp, force);
- ldlm_namespace_free_post(ns);
+ ldlm_namespace_free_prior(ns, imp, force);
+ ldlm_namespace_free_post(ns);
}
+EXPORT_SYMBOL(ldlm_namespace_free);
void ldlm_namespace_get(struct ldlm_namespace *ns)
{
- cfs_atomic_inc(&ns->ns_bref);
+ atomic_inc(&ns->ns_bref);
}
-void ldlm_namespace_put(struct ldlm_namespace *ns)
+/* This is only for callers that care about refcount */
+static int ldlm_namespace_get_return(struct ldlm_namespace *ns)
{
- if (cfs_atomic_dec_and_lock(&ns->ns_bref, &ns->ns_lock)) {
- cfs_waitq_signal(&ns->ns_waitq);
- cfs_spin_unlock(&ns->ns_lock);
- }
+ return atomic_inc_return(&ns->ns_bref);
}
-/* Register @ns in the list of namespaces */
-void ldlm_namespace_register(struct ldlm_namespace *ns, ldlm_side_t client)
+void ldlm_namespace_put(struct ldlm_namespace *ns)
{
- cfs_mutex_lock(ldlm_namespace_lock(client));
- LASSERT(cfs_list_empty(&ns->ns_list_chain));
- cfs_list_add(&ns->ns_list_chain, ldlm_namespace_list(client));
- cfs_atomic_inc(ldlm_namespace_nr(client));
- cfs_mutex_unlock(ldlm_namespace_lock(client));
+ if (atomic_dec_and_lock(&ns->ns_bref, &ns->ns_lock)) {
+ wake_up(&ns->ns_waitq);
+ spin_unlock(&ns->ns_lock);
+ }
}
-/* Unregister @ns from the list of namespaces */
-void ldlm_namespace_unregister(struct ldlm_namespace *ns, ldlm_side_t client)
+/** Register \a ns in the list of namespaces */
+void ldlm_namespace_register(struct ldlm_namespace *ns, enum ldlm_side client)
{
- cfs_mutex_lock(ldlm_namespace_lock(client));
- LASSERT(!cfs_list_empty(&ns->ns_list_chain));
- /*
- * Some asserts and possibly other parts of code still using
- * list_empty(&ns->ns_list_chain). This is why it is important
- * to use list_del_init() here.
- */
- cfs_list_del_init(&ns->ns_list_chain);
- cfs_atomic_dec(ldlm_namespace_nr(client));
- cfs_mutex_unlock(ldlm_namespace_lock(client));
+ mutex_lock(ldlm_namespace_lock(client));
+ LASSERT(list_empty(&ns->ns_list_chain));
+ list_add(&ns->ns_list_chain, ldlm_namespace_inactive_list(client));
+ ldlm_namespace_nr_inc(client);
+ mutex_unlock(ldlm_namespace_lock(client));
}
-/* Should be called under ldlm_namespace_lock(client) taken */
-void ldlm_namespace_move_locked(struct ldlm_namespace *ns, ldlm_side_t client)
+/** Unregister \a ns from the list of namespaces. */
+void ldlm_namespace_unregister(struct ldlm_namespace *ns, enum ldlm_side client)
{
- LASSERT(!cfs_list_empty(&ns->ns_list_chain));
- LASSERT_MUTEX_LOCKED(ldlm_namespace_lock(client));
- cfs_list_move_tail(&ns->ns_list_chain, ldlm_namespace_list(client));
+ mutex_lock(ldlm_namespace_lock(client));
+ LASSERT(!list_empty(&ns->ns_list_chain));
+ /* Some asserts and possibly other parts of the code are still
+ * using list_empty(&ns->ns_list_chain). This is why it is
+ * important to use list_del_init() here. */
+ list_del_init(&ns->ns_list_chain);
+ ldlm_namespace_nr_dec(client);
+ mutex_unlock(ldlm_namespace_lock(client));
}
-/* Should be called under ldlm_namespace_lock(client) taken */
-struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t client)
+/** Should be called with ldlm_namespace_lock(client) taken. */
+void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *ns,
+ enum ldlm_side client)
{
- LASSERT_MUTEX_LOCKED(ldlm_namespace_lock(client));
- LASSERT(!cfs_list_empty(ldlm_namespace_list(client)));
- return container_of(ldlm_namespace_list(client)->next,
- struct ldlm_namespace, ns_list_chain);
+ LASSERT(!list_empty(&ns->ns_list_chain));
+ LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
+ list_move_tail(&ns->ns_list_chain, ldlm_namespace_list(client));
}
-static struct ldlm_resource *ldlm_resource_new(void)
+/** Should be called with ldlm_namespace_lock(client) taken. */
+void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *ns,
+ enum ldlm_side client)
{
- struct ldlm_resource *res;
- int idx;
-
- OBD_SLAB_ALLOC_PTR_GFP(res, ldlm_resource_slab, CFS_ALLOC_IO);
- if (res == NULL)
- return NULL;
+ LASSERT(!list_empty(&ns->ns_list_chain));
+ LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
+ list_move_tail(&ns->ns_list_chain,
+ ldlm_namespace_inactive_list(client));
+}
- CFS_INIT_LIST_HEAD(&res->lr_granted);
- CFS_INIT_LIST_HEAD(&res->lr_converting);
- CFS_INIT_LIST_HEAD(&res->lr_waiting);
+/** Should be called with ldlm_namespace_lock(client) taken. */
+struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side client)
+{
+ LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
+ LASSERT(!list_empty(ldlm_namespace_list(client)));
+ return container_of(ldlm_namespace_list(client)->next,
+ struct ldlm_namespace, ns_list_chain);
+}
- /* initialize interval trees for each lock mode*/
- for (idx = 0; idx < LCK_MODE_NUM; idx++) {
- res->lr_itree[idx].lit_size = 0;
- res->lr_itree[idx].lit_mode = 1 << idx;
- res->lr_itree[idx].lit_root = NULL;
- }
+static bool ldlm_resource_extent_new(struct ldlm_resource *res)
+{
+ int idx;
+
+ OBD_SLAB_ALLOC(res->lr_itree, ldlm_interval_tree_slab,
+ sizeof(*res->lr_itree) * LCK_MODE_NUM);
+ if (res->lr_itree == NULL)
+ return false;
+ /* Initialize interval trees for each lock mode. */
+ for (idx = 0; idx < LCK_MODE_NUM; idx++) {
+ res->lr_itree[idx].lit_size = 0;
+ res->lr_itree[idx].lit_mode = 1 << idx;
+ res->lr_itree[idx].lit_root = NULL;
+ }
+ return true;
+}
- cfs_atomic_set(&res->lr_refcount, 1);
- cfs_spin_lock_init(&res->lr_lock);
- lu_ref_init(&res->lr_reference);
+static bool ldlm_resource_inodebits_new(struct ldlm_resource *res)
+{
+ int i;
+
+ OBD_ALLOC_PTR(res->lr_ibits_queues);
+ if (res->lr_ibits_queues == NULL)
+ return false;
+ for (i = 0; i < MDS_INODELOCK_NUMBITS; i++)
+ INIT_LIST_HEAD(&res->lr_ibits_queues->liq_waiting[i]);
+ return true;
+}
- /* one who creates the resource must unlock
- * the mutex after lvb initialization */
- cfs_mutex_init(&res->lr_lvb_mutex);
- cfs_mutex_lock(&res->lr_lvb_mutex);
+/** Create and initialize new resource. */
+static struct ldlm_resource *ldlm_resource_new(enum ldlm_type ldlm_type)
+{
+ struct ldlm_resource *res;
+ bool rc;
+
+ OBD_SLAB_ALLOC_PTR_GFP(res, ldlm_resource_slab, GFP_NOFS);
+ if (res == NULL)
+ return NULL;
+
+ switch (ldlm_type) {
+ case LDLM_EXTENT:
+ rc = ldlm_resource_extent_new(res);
+ break;
+ case LDLM_IBITS:
+ rc = ldlm_resource_inodebits_new(res);
+ break;
+ default:
+ rc = true;
+ break;
+ }
+ if (!rc) {
+ OBD_SLAB_FREE_PTR(res, ldlm_resource_slab);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&res->lr_granted);
+ INIT_LIST_HEAD(&res->lr_waiting);
+
+ atomic_set(&res->lr_refcount, 1);
+ spin_lock_init(&res->lr_lock);
+ lu_ref_init(&res->lr_reference);
+
+ /* Since LVB init can be delayed now, there is no longer need to
+ * immediatelly acquire mutex here. */
+ mutex_init(&res->lr_lvb_mutex);
+ res->lr_lvb_initialized = false;
+
+ return res;
+}
- return res;
+static void ldlm_resource_free(struct ldlm_resource *res)
+{
+ if (res->lr_type == LDLM_EXTENT) {
+ if (res->lr_itree != NULL)
+ OBD_SLAB_FREE(res->lr_itree, ldlm_interval_tree_slab,
+ sizeof(*res->lr_itree) * LCK_MODE_NUM);
+ } else if (res->lr_type == LDLM_IBITS) {
+ if (res->lr_ibits_queues != NULL)
+ OBD_FREE_PTR(res->lr_ibits_queues);
+ }
+
+ OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
}
-/* Args: unlocked namespace
- * * Locks: takes and releases NS hash-lock and res->lr_lock
- * * Returns: referenced, unlocked ldlm_resource or NULL */
+/**
+ * Return a reference to resource with given name, creating it if necessary.
+ * Args: namespace with ns_lock unlocked
+ * Locks: takes and releases NS hash-lock and res->lr_lock
+ * Returns: referenced, unlocked ldlm_resource or NULL
+ */
struct ldlm_resource *
ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
- const struct ldlm_res_id *name, ldlm_type_t type, int create)
-{
- cfs_hlist_node_t *hnode;
- struct ldlm_resource *res;
- cfs_hash_bd_t bd;
- __u64 version;
-
- LASSERT(ns != NULL);
- LASSERT(parent == NULL);
- LASSERT(ns->ns_rs_hash != NULL);
- LASSERT(name->name[0] != 0);
-
- cfs_hash_bd_get_and_lock(ns->ns_rs_hash, (void *)name, &bd, 0);
- hnode = cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
- if (hnode != NULL) {
- cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- /* synchronize WRT resource creation */
- if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
- cfs_mutex_lock(&res->lr_lvb_mutex);
- cfs_mutex_unlock(&res->lr_lvb_mutex);
- }
- return res;
- }
-
- version = cfs_hash_bd_version_get(&bd);
- cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
-
- if (create == 0)
- return NULL;
-
- LASSERTF(type >= LDLM_MIN_TYPE && type < LDLM_MAX_TYPE,
- "type: %d\n", type);
- res = ldlm_resource_new();
- if (!res)
- return NULL;
-
- res->lr_ns_bucket = cfs_hash_bd_extra_get(ns->ns_rs_hash, &bd);
- res->lr_name = *name;
- res->lr_type = type;
- res->lr_most_restr = LCK_NL;
-
- cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
- hnode = (version == cfs_hash_bd_version_get(&bd)) ? NULL :
- cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
-
- if (hnode != NULL) {
- /* someone won the race and added the resource before */
- cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
- /* clean lu_ref for failed resource */
- lu_ref_fini(&res->lr_reference);
- OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
-
- res = cfs_hlist_entry(hnode, struct ldlm_resource, lr_hash);
- /* synchronize WRT resource creation */
- if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
- cfs_mutex_lock(&res->lr_lvb_mutex);
- cfs_mutex_unlock(&res->lr_lvb_mutex);
- }
- return res;
- }
- /* we won! let's add the resource */
- cfs_hash_bd_add_locked(ns->ns_rs_hash, &bd, &res->lr_hash);
- if (cfs_hash_bd_count_get(&bd) == 1)
- ldlm_namespace_get(ns);
-
- cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
- if (ns->ns_lvbo && ns->ns_lvbo->lvbo_init) {
- int rc;
-
- OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CREATE_RESOURCE, 2);
- rc = ns->ns_lvbo->lvbo_init(res);
- if (rc)
- CERROR("lvbo_init failed for resource "
- LPU64": rc %d\n", name->name[0], rc);
- /* we create resource with locked lr_lvb_mutex */
- cfs_mutex_unlock(&res->lr_lvb_mutex);
- }
-
- return res;
+ const struct ldlm_res_id *name, enum ldlm_type type,
+ int create)
+{
+ struct hlist_node *hnode;
+ struct ldlm_resource *res = NULL;
+ struct cfs_hash_bd bd;
+ __u64 version;
+ int ns_refcount = 0;
+
+ LASSERT(ns != NULL);
+ LASSERT(parent == NULL);
+ LASSERT(ns->ns_rs_hash != NULL);
+ LASSERT(name->name[0] != 0);
+
+ cfs_hash_bd_get_and_lock(ns->ns_rs_hash, (void *)name, &bd, 0);
+ hnode = cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
+ if (hnode != NULL) {
+ cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
+ GOTO(found, res);
+ }
+
+ version = cfs_hash_bd_version_get(&bd);
+ cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 0);
+
+ if (create == 0)
+ return ERR_PTR(-ENOENT);
+
+ LASSERTF(type >= LDLM_MIN_TYPE && type < LDLM_MAX_TYPE,
+ "type: %d\n", type);
+ res = ldlm_resource_new(type);
+ if (res == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ res->lr_ns_bucket = cfs_hash_bd_extra_get(ns->ns_rs_hash, &bd);
+ res->lr_name = *name;
+ res->lr_type = type;
+
+ cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
+ hnode = (version == cfs_hash_bd_version_get(&bd)) ? NULL :
+ cfs_hash_bd_lookup_locked(ns->ns_rs_hash, &bd, (void *)name);
+
+ if (hnode != NULL) {
+ /* Someone won the race and already added the resource. */
+ cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
+ /* Clean lu_ref for failed resource. */
+ lu_ref_fini(&res->lr_reference);
+ ldlm_resource_free(res);
+found:
+ res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
+ return res;
+ }
+ /* We won! Let's add the resource. */
+ cfs_hash_bd_add_locked(ns->ns_rs_hash, &bd, &res->lr_hash);
+ if (cfs_hash_bd_count_get(&bd) == 1)
+ ns_refcount = ldlm_namespace_get_return(ns);
+
+ cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CREATE_RESOURCE, 2);
+
+ /* Let's see if we happened to be the very first resource in this
+ * namespace. If so, and this is a client namespace, we need to move
+ * the namespace into the active namespaces list to be patrolled by
+ * the ldlm_poold. */
+ if (ns_is_client(ns) && ns_refcount == 1) {
+ mutex_lock(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
+ ldlm_namespace_move_to_active_locked(ns, LDLM_NAMESPACE_CLIENT);
+ mutex_unlock(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
+ }
+
+ return res;
}
+EXPORT_SYMBOL(ldlm_resource_get);
struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res)
{
- LASSERT(res != NULL);
- LASSERT(res != LP_POISON);
- cfs_atomic_inc(&res->lr_refcount);
- CDEBUG(D_INFO, "getref res: %p count: %d\n", res,
- cfs_atomic_read(&res->lr_refcount));
- return res;
+ LASSERT(res != NULL);
+ LASSERT(res != LP_POISON);
+ atomic_inc(&res->lr_refcount);
+ CDEBUG(D_INFO, "getref res: %p count: %d\n", res,
+ atomic_read(&res->lr_refcount));
+ return res;
}
-static void __ldlm_resource_putref_final(cfs_hash_bd_t *bd,
+static void __ldlm_resource_putref_final(struct cfs_hash_bd *bd,
struct ldlm_resource *res)
{
- struct ldlm_ns_bucket *nsb = res->lr_ns_bucket;
-
- if (!cfs_list_empty(&res->lr_granted)) {
- ldlm_resource_dump(D_ERROR, res);
- LBUG();
- }
-
- if (!cfs_list_empty(&res->lr_converting)) {
- ldlm_resource_dump(D_ERROR, res);
- LBUG();
- }
-
- if (!cfs_list_empty(&res->lr_waiting)) {
- ldlm_resource_dump(D_ERROR, res);
- LBUG();
- }
-
- cfs_hash_bd_del_locked(nsb->nsb_namespace->ns_rs_hash,
- bd, &res->lr_hash);
- lu_ref_fini(&res->lr_reference);
- if (cfs_hash_bd_count_get(bd) == 0)
- ldlm_namespace_put(nsb->nsb_namespace);
+ struct ldlm_ns_bucket *nsb = res->lr_ns_bucket;
+
+ if (!list_empty(&res->lr_granted)) {
+ ldlm_resource_dump(D_ERROR, res);
+ LBUG();
+ }
+
+ if (!list_empty(&res->lr_waiting)) {
+ ldlm_resource_dump(D_ERROR, res);
+ LBUG();
+ }
+
+ cfs_hash_bd_del_locked(nsb->nsb_namespace->ns_rs_hash,
+ bd, &res->lr_hash);
+ lu_ref_fini(&res->lr_reference);
+ if (cfs_hash_bd_count_get(bd) == 0)
+ ldlm_namespace_put(nsb->nsb_namespace);
}
/* Returns 1 if the resource was freed, 0 if it remains. */
int ldlm_resource_putref(struct ldlm_resource *res)
{
- struct ldlm_namespace *ns = ldlm_res_to_ns(res);
- cfs_hash_bd_t bd;
-
- LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
- CDEBUG(D_INFO, "putref res: %p count: %d\n",
- res, cfs_atomic_read(&res->lr_refcount) - 1);
-
- cfs_hash_bd_get(ns->ns_rs_hash, &res->lr_name, &bd);
- if (cfs_hash_bd_dec_and_lock(ns->ns_rs_hash, &bd, &res->lr_refcount)) {
- __ldlm_resource_putref_final(&bd, res);
- cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
- if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
- ns->ns_lvbo->lvbo_free(res);
- OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
- return 1;
- }
- return 0;
+ struct ldlm_namespace *ns = ldlm_res_to_ns(res);
+ struct cfs_hash_bd bd;
+
+ LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
+ CDEBUG(D_INFO, "putref res: %p count: %d\n",
+ res, atomic_read(&res->lr_refcount) - 1);
+
+ cfs_hash_bd_get(ns->ns_rs_hash, &res->lr_name, &bd);
+ if (cfs_hash_bd_dec_and_lock(ns->ns_rs_hash, &bd, &res->lr_refcount)) {
+ __ldlm_resource_putref_final(&bd, res);
+ cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
+ if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
+ ns->ns_lvbo->lvbo_free(res);
+ ldlm_resource_free(res);
+ return 1;
+ }
+ return 0;
}
+EXPORT_SYMBOL(ldlm_resource_putref);
-/* Returns 1 if the resource was freed, 0 if it remains. */
-int ldlm_resource_putref_locked(struct ldlm_resource *res)
+/**
+ * Add a lock into a given resource into specified lock list.
+ */
+void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
+ struct ldlm_lock *lock)
{
- struct ldlm_namespace *ns = ldlm_res_to_ns(res);
-
- LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
- CDEBUG(D_INFO, "putref res: %p count: %d\n",
- res, cfs_atomic_read(&res->lr_refcount) - 1);
-
- if (cfs_atomic_dec_and_test(&res->lr_refcount)) {
- cfs_hash_bd_t bd;
-
- cfs_hash_bd_get(ldlm_res_to_ns(res)->ns_rs_hash,
- &res->lr_name, &bd);
- __ldlm_resource_putref_final(&bd, res);
- cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
- /* NB: ns_rs_hash is created with CFS_HASH_NO_ITEMREF,
- * so we should never be here while calling cfs_hash_del,
- * cfs_hash_for_each_nolock is the only case we can get
- * here, which is safe to release cfs_hash_bd_lock.
- */
- if (ns->ns_lvbo && ns->ns_lvbo->lvbo_free)
- ns->ns_lvbo->lvbo_free(res);
- OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
+ check_res_locked(res);
- cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
- return 1;
- }
- return 0;
-}
-
-void ldlm_resource_add_lock(struct ldlm_resource *res, cfs_list_t *head,
- struct ldlm_lock *lock)
-{
- check_res_locked(res);
+ LDLM_DEBUG(lock, "About to add this lock");
- LDLM_DEBUG(lock, "About to add this lock:\n");
+ if (ldlm_is_destroyed(lock)) {
+ CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
+ return;
+ }
- if (lock->l_destroyed) {
- CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
- return;
- }
+ LASSERT(list_empty(&lock->l_res_link));
- LASSERT(cfs_list_empty(&lock->l_res_link));
+ list_add_tail(&lock->l_res_link, head);
- cfs_list_add_tail(&lock->l_res_link, head);
+ if (res->lr_type == LDLM_IBITS)
+ ldlm_inodebits_add_lock(res, head, lock);
}
+/**
+ * Insert a lock into resource after specified lock.
+ *
+ * Obtain resource description from the lock we are inserting after.
+ */
void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
- struct ldlm_lock *new)
+ struct ldlm_lock *new)
{
- struct ldlm_resource *res = original->l_resource;
+ struct ldlm_resource *res = original->l_resource;
- check_res_locked(res);
+ check_res_locked(res);
- ldlm_resource_dump(D_INFO, res);
- LDLM_DEBUG(new, "About to insert this lock after %p:\n", original);
+ ldlm_resource_dump(D_INFO, res);
+ LDLM_DEBUG(new, "About to insert this lock after %p: ", original);
- if (new->l_destroyed) {
- CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
- goto out;
- }
+ if (ldlm_is_destroyed(new)) {
+ CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
+ goto out;
+ }
- LASSERT(cfs_list_empty(&new->l_res_link));
+ LASSERT(list_empty(&new->l_res_link));
- cfs_list_add(&new->l_res_link, &original->l_res_link);
+ list_add(&new->l_res_link, &original->l_res_link);
out:;
}
void ldlm_resource_unlink_lock(struct ldlm_lock *lock)
{
- int type = lock->l_resource->lr_type;
-
- check_res_locked(lock->l_resource);
- if (type == LDLM_IBITS || type == LDLM_PLAIN)
- ldlm_unlink_lock_skiplist(lock);
- else if (type == LDLM_EXTENT)
- ldlm_extent_unlink_lock(lock);
- cfs_list_del_init(&lock->l_res_link);
+ int type = lock->l_resource->lr_type;
+
+ check_res_locked(lock->l_resource);
+ switch (type) {
+ case LDLM_PLAIN:
+ ldlm_unlink_lock_skiplist(lock);
+ break;
+ case LDLM_EXTENT:
+ ldlm_extent_unlink_lock(lock);
+ break;
+ case LDLM_IBITS:
+ ldlm_inodebits_unlink_lock(lock);
+ break;
+ }
+ list_del_init(&lock->l_res_link);
}
+EXPORT_SYMBOL(ldlm_resource_unlink_lock);
void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc)
{
- desc->lr_type = res->lr_type;
- desc->lr_name = res->lr_name;
+ desc->lr_type = res->lr_type;
+ desc->lr_name = res->lr_name;
}
-void ldlm_dump_all_namespaces(ldlm_side_t client, int level)
+/**
+ * Print information about all locks in all namespaces on this node to debug
+ * log.
+ */
+void ldlm_dump_all_namespaces(enum ldlm_side client, int level)
{
- cfs_list_t *tmp;
+ struct list_head *tmp;
+
+ if (!((libcfs_debug | D_ERROR) & level))
+ return;
- if (!((libcfs_debug | D_ERROR) & level))
- return;
+ mutex_lock(ldlm_namespace_lock(client));
- cfs_mutex_lock(ldlm_namespace_lock(client));
+ list_for_each(tmp, ldlm_namespace_list(client)) {
+ struct ldlm_namespace *ns;
- cfs_list_for_each(tmp, ldlm_namespace_list(client)) {
- struct ldlm_namespace *ns;
- ns = cfs_list_entry(tmp, struct ldlm_namespace, ns_list_chain);
- ldlm_namespace_dump(level, ns);
- }
+ ns = list_entry(tmp, struct ldlm_namespace, ns_list_chain);
+ ldlm_namespace_dump(level, ns);
+ }
- cfs_mutex_unlock(ldlm_namespace_lock(client));
+ mutex_unlock(ldlm_namespace_lock(client));
}
-static int ldlm_res_hash_dump(cfs_hash_t *hs, cfs_hash_bd_t *bd,
- cfs_hlist_node_t *hnode, void *arg)
+static int ldlm_res_hash_dump(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *arg)
{
- struct ldlm_resource *res = cfs_hash_object(hs, hnode);
- int level = (int)(unsigned long)arg;
+ struct ldlm_resource *res = cfs_hash_object(hs, hnode);
+ int level = (int)(unsigned long)arg;
- lock_res(res);
- ldlm_resource_dump(level, res);
- unlock_res(res);
+ lock_res(res);
+ ldlm_resource_dump(level, res);
+ unlock_res(res);
- return 0;
+ return 0;
}
+/**
+ * Print information about all locks in this namespace on this node to debug
+ * log.
+ */
void ldlm_namespace_dump(int level, struct ldlm_namespace *ns)
{
- if (!((libcfs_debug | D_ERROR) & level))
- return;
-
- CDEBUG(level, "--- Namespace: %s (rc: %d, side: %s)\n",
- ldlm_ns_name(ns), cfs_atomic_read(&ns->ns_bref),
- ns_is_client(ns) ? "client" : "server");
-
- if (cfs_time_before(cfs_time_current(), ns->ns_next_dump))
- return;
-
- cfs_hash_for_each_nolock(ns->ns_rs_hash,
- ldlm_res_hash_dump,
- (void *)(unsigned long)level);
- cfs_spin_lock(&ns->ns_lock);
- ns->ns_next_dump = cfs_time_shift(10);
- cfs_spin_unlock(&ns->ns_lock);
+ if (!((libcfs_debug | D_ERROR) & level))
+ return;
+
+ CDEBUG(level, "--- Namespace: %s (rc: %d, side: %s)\n",
+ ldlm_ns_name(ns), atomic_read(&ns->ns_bref),
+ ns_is_client(ns) ? "client" : "server");
+
+ if (ktime_get_seconds() < ns->ns_next_dump)
+ return;
+
+ cfs_hash_for_each_nolock(ns->ns_rs_hash,
+ ldlm_res_hash_dump,
+ (void *)(unsigned long)level, 0);
+ spin_lock(&ns->ns_lock);
+ ns->ns_next_dump = ktime_get_seconds() + 10;
+ spin_unlock(&ns->ns_lock);
}
+/**
+ * Print information about all locks in this resource to debug log.
+ */
void ldlm_resource_dump(int level, struct ldlm_resource *res)
{
- struct ldlm_lock *lock;
- unsigned int granted = 0;
-
- CLASSERT(RES_NAME_SIZE == 4);
-
- if (!((libcfs_debug | D_ERROR) & level))
- return;
-
- CDEBUG(level, "--- Resource: %p ("LPU64"/"LPU64"/"LPU64"/"LPU64
- ") (rc: %d)\n", res, res->lr_name.name[0], res->lr_name.name[1],
- res->lr_name.name[2], res->lr_name.name[3],
- cfs_atomic_read(&res->lr_refcount));
-
- if (!cfs_list_empty(&res->lr_granted)) {
- CDEBUG(level, "Granted locks (in reverse order):\n");
- cfs_list_for_each_entry_reverse(lock, &res->lr_granted,
- l_res_link) {
- LDLM_DEBUG_LIMIT(level, lock, "###");
- if (!(level & D_CANTMASK) &&
- ++granted > ldlm_dump_granted_max) {
- CDEBUG(level, "only dump %d granted locks to "
- "avoid DDOS.\n", granted);
- break;
- }
- }
- }
- if (!cfs_list_empty(&res->lr_converting)) {
- CDEBUG(level, "Converting locks:\n");
- cfs_list_for_each_entry(lock, &res->lr_converting, l_res_link)
- LDLM_DEBUG_LIMIT(level, lock, "###");
- }
- if (!cfs_list_empty(&res->lr_waiting)) {
- CDEBUG(level, "Waiting locks:\n");
- cfs_list_for_each_entry(lock, &res->lr_waiting, l_res_link)
- LDLM_DEBUG_LIMIT(level, lock, "###");
- }
+ struct ldlm_lock *lock;
+ unsigned int granted = 0;
+
+ CLASSERT(RES_NAME_SIZE == 4);
+
+ if (!((libcfs_debug | D_ERROR) & level))
+ return;
+
+ CDEBUG(level, "--- Resource: "DLDLMRES" (%p) refcount = %d\n",
+ PLDLMRES(res), res, atomic_read(&res->lr_refcount));
+
+ if (!list_empty(&res->lr_granted)) {
+ CDEBUG(level, "Granted locks (in reverse order):\n");
+ list_for_each_entry_reverse(lock, &res->lr_granted,
+ l_res_link) {
+ LDLM_DEBUG_LIMIT(level, lock, "###");
+ if (!(level & D_CANTMASK) &&
+ ++granted > ldlm_dump_granted_max) {
+ CDEBUG(level,
+ "only dump %d granted locks to avoid DDOS.\n",
+ granted);
+ break;
+ }
+ }
+ }
+
+ if (!list_empty(&res->lr_waiting)) {
+ CDEBUG(level, "Waiting locks:\n");
+ list_for_each_entry(lock, &res->lr_waiting, l_res_link)
+ LDLM_DEBUG_LIMIT(level, lock, "###");
+ }
}
+EXPORT_SYMBOL(ldlm_resource_dump);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff