X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fldlm%2Fldlm_resource.c;h=6d28079234b080494c6bbaac4eaa9e3b91a44d54;hb=b43c7cc6cba514687ebcbeaa1a7dcc8cf7ffa694;hp=bed49ee3b1d8f67dfaea023df7ad86fff0fcb587;hpb=b1e595c09e1b07a6840142b3ae015b8a5a8affeb;p=fs%2Flustre-release.git

diff --git a/lustre/ldlm/ldlm_resource.c b/lustre/ldlm/ldlm_resource.c
index bed49ee..6d28079 100644
--- a/lustre/ldlm/ldlm_resource.c
+++ b/lustre/ldlm/ldlm_resource.c
@@ -15,11 +15,7 @@
  *
  * 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
  */
@@ -27,7 +23,7 @@
  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2010, 2013, Intel Corporation.
+ * Copyright (c) 2010, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -46,90 +42,217 @@
 #include "ldlm_internal.h"
 
 struct kmem_cache *ldlm_resource_slab, *ldlm_lock_slab;
+struct kmem_cache *ldlm_interval_tree_slab;
 
 int ldlm_srv_namespace_nr = 0;
 int ldlm_cli_namespace_nr = 0;
 
-struct mutex ldlm_srv_namespace_lock;
-struct list_head ldlm_srv_namespace_list;
+DEFINE_MUTEX(ldlm_srv_namespace_lock);
+LIST_HEAD(ldlm_srv_namespace_list);
 
-struct mutex ldlm_cli_namespace_lock;
+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 */
-struct list_head ldlm_cli_active_namespace_list;
+LIST_HEAD(ldlm_cli_active_namespace_list);
 /* Client namespaces that don't have any locks in them */
-struct list_head ldlm_cli_inactive_namespace_list;
-
-struct proc_dir_entry *ldlm_type_proc_dir = NULL;
-struct proc_dir_entry *ldlm_ns_proc_dir = NULL;
-struct proc_dir_entry *ldlm_svc_proc_dir = NULL;
+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;
+static unsigned int ldlm_dump_granted_max = 256;
 
-#ifdef LPROCFS
-static ssize_t
-lprocfs_dump_ns_seq_write(struct file *file, const char __user *buffer,
-			  size_t count, loff_t *off)
+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);
 }
-LPROC_SEQ_FOPS_WO_TYPE(ldlm, dump_ns);
 
-LPROC_SEQ_FOPS_RW_TYPE(ldlm_rw, uint);
-LPROC_SEQ_FOPS_RO_TYPE(ldlm, uint);
+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;
+}
 
-int ldlm_proc_setup(void)
+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;
-	struct lprocfs_seq_vars 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 },
-		{ .name	=	"cancel_unused_locks_before_replay",
-		  .fops	=	&ldlm_rw_uint_fops,
-		  .data	=	&ldlm_cancel_unused_locks_before_replay },
-		{ NULL }};
-	ENTRY;
-	LASSERT(ldlm_ns_proc_dir == NULL);
 
-	ldlm_type_proc_dir = lprocfs_seq_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);
+	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_proc_dir = lprocfs_seq_register("namespaces",
-						ldlm_type_proc_dir,
+	ldlm_ns_debugfs_dir = ldebugfs_register("namespaces",
+						ldlm_debugfs_dir,
 						NULL, NULL);
-	if (IS_ERR(ldlm_ns_proc_dir)) {
+	if (IS_ERR_OR_NULL(ldlm_ns_debugfs_dir)) {
 		CERROR("LProcFS failed in ldlm-init\n");
-		rc = PTR_ERR(ldlm_ns_proc_dir);
+		rc = ldlm_ns_debugfs_dir ? PTR_ERR(ldlm_ns_debugfs_dir)
+					 : -ENOMEM;
 		GOTO(err_type, rc);
 	}
 
-	ldlm_svc_proc_dir = lprocfs_seq_register("services",
-						ldlm_type_proc_dir,
-						NULL, NULL);
-	if (IS_ERR(ldlm_svc_proc_dir)) {
+	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 = PTR_ERR(ldlm_svc_proc_dir);
+		rc = ldlm_svc_debugfs_dir ? PTR_ERR(ldlm_svc_debugfs_dir)
+					  : -ENOMEM;
 		GOTO(err_ns, rc);
 	}
 
-	rc = lprocfs_seq_add_vars(ldlm_type_proc_dir, list, NULL);
+	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);
@@ -138,169 +261,224 @@ int ldlm_proc_setup(void)
 	RETURN(0);
 
 err_svc:
-	lprocfs_remove(&ldlm_svc_proc_dir);
+	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 (ldlm_ns_proc_dir)
-                lprocfs_remove(&ldlm_ns_proc_dir);
+	if (!IS_ERR_OR_NULL(ldlm_ns_debugfs_dir))
+		ldebugfs_remove(&ldlm_ns_debugfs_dir);
 
-        if (ldlm_type_proc_dir)
-                lprocfs_remove(&ldlm_type_proc_dir);
+	if (!IS_ERR_OR_NULL(ldlm_debugfs_dir))
+		ldebugfs_remove(&ldlm_debugfs_dir);
+
+	ldlm_svc_debugfs_dir = NULL;
+	ldlm_ns_debugfs_dir = NULL;
+	ldlm_debugfs_dir = NULL;
 }
 
-static int lprocfs_ns_resources_seq_show(struct seq_file *m, void *v)
+static ssize_t resource_count_show(struct kobject *kobj, struct attribute *attr,
+				   char *buf)
 {
-	struct ldlm_namespace	*ns  = m->private;
+	struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+						 ns_kobj);
 	__u64			res = 0;
-	cfs_hash_bd_t		bd;
+	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 lprocfs_u64_seq_show(m, &res);
+	return sprintf(buf, "%lld\n", res);
 }
-LPROC_SEQ_FOPS_RO(lprocfs_ns_resources);
+LUSTRE_RO_ATTR(resource_count);
 
-static int lprocfs_ns_locks_seq_show(struct seq_file *m, void *v)
+static ssize_t lock_count_show(struct kobject *kobj, struct attribute *attr,
+			       char *buf)
 {
-	struct ldlm_namespace	*ns = m->private;
+	struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+						 ns_kobj);
 	__u64			locks;
 
 	locks = lprocfs_stats_collector(ns->ns_stats, LDLM_NSS_LOCKS,
 					LPROCFS_FIELDS_FLAGS_SUM);
-	return lprocfs_u64_seq_show(m, &locks);
+	return sprintf(buf, "%lld\n", locks);
 }
-LPROC_SEQ_FOPS_RO(lprocfs_ns_locks);
+LUSTRE_RO_ATTR(lock_count);
 
-static int lprocfs_lru_size_seq_show(struct seq_file *m, void *v)
+static ssize_t lock_unused_count_show(struct kobject *kobj,
+				      struct attribute *attr,
+				      char *buf)
 {
-	struct ldlm_namespace *ns = m->private;
+	struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+						 ns_kobj);
+
+	return sprintf(buf, "%d\n", ns->ns_nr_unused);
+}
+LUSTRE_RO_ATTR(lock_unused_count);
+
+static ssize_t lru_size_show(struct kobject *kobj, struct attribute *attr,
+			     char *buf)
+{
+	struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+						 ns_kobj);
 	__u32 *nr = &ns->ns_max_unused;
 
 	if (ns_connect_lru_resize(ns))
 		nr = &ns->ns_nr_unused;
-	return lprocfs_uint_seq_show(m, nr);
+	return sprintf(buf, "%u\n", *nr);
 }
 
-static ssize_t lprocfs_lru_size_seq_write(struct file *file,
-					  const char __user *buffer,
-					  size_t count, loff_t *off)
+static ssize_t lru_size_store(struct kobject *kobj, struct attribute *attr,
+			      const char *buffer, size_t count)
 {
-	struct ldlm_namespace *ns = ((struct seq_file *)file->private_data)->private;
-        char dummy[MAX_STRING_SIZE + 1], *end;
-        unsigned long tmp;
-        int lru_resize;
-
-        dummy[MAX_STRING_SIZE] = '\0';
-	if (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, 0,
-						   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, 0, 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, LCF_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, LCF_ASYNC, LDLM_CANCEL_PASSED);
+	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;
-                }
-        }
+		 * 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);
+
+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 sprintf(buf, "%lld\n", ktime_to_ms(ns->ns_max_age));
+}
+
+static ssize_t lru_max_age_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);
+	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;
+	}
+
+	if (buf)
+		*buf = '\0';
 
-        return count;
+	if (kstrtoull(buffer, 10, &tmp))
+		return -EINVAL;
+
+	ns->ns_max_age = ktime_set(0, tmp * scale);
+
+	return count;
 }
-LPROC_SEQ_FOPS(lprocfs_lru_size);
+LUSTRE_RW_ATTR(lru_max_age);
 
-static int lprocfs_elc_seq_show(struct seq_file *m, void *v)
+static ssize_t early_lock_cancel_show(struct kobject *kobj,
+				      struct attribute *attr,
+				      char *buf)
 {
-	struct ldlm_namespace *ns = m->private;
-	unsigned int supp = ns_connect_cancelset(ns);
+	struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+						 ns_kobj);
 
-	return lprocfs_uint_seq_show(m, &supp);
+	return sprintf(buf, "%d\n", ns_connect_cancelset(ns));
 }
 
-static ssize_t lprocfs_elc_seq_write(struct file *file,
-				     const char __user *buffer,
-				     size_t count, loff_t *off)
+static ssize_t early_lock_cancel_store(struct kobject *kobj,
+				       struct attribute *attr,
+				       const char *buffer,
+				       size_t count)
 {
-	struct ldlm_namespace *ns = ((struct seq_file *)file->private_data)->private;
-	unsigned int supp = -1;
+	struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+						 ns_kobj);
+	unsigned long supp = -1;
 	int rc;
 
-	rc = lprocfs_wr_uint(file, buffer, count, &supp);
+	rc = kstrtoul(buffer, 10, &supp);
 	if (rc < 0)
 		return rc;
 
@@ -310,111 +488,296 @@ static ssize_t lprocfs_elc_seq_write(struct file *file,
 		ns->ns_connect_flags |= OBD_CONNECT_CANCELSET;
 	return count;
 }
-LPROC_SEQ_FOPS(lprocfs_elc);
+LUSTRE_RW_ATTR(early_lock_cancel);
+
+static ssize_t dirty_age_limit_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_dirty_age_limit);
+}
 
-void ldlm_namespace_proc_unregister(struct ldlm_namespace *ns)
+static ssize_t dirty_age_limit_store(struct kobject *kobj,
+				     struct attribute *attr,
+				     const char *buffer, size_t count)
 {
-	if (ns->ns_proc_dir_entry == NULL)
-                CERROR("dlm namespace %s has no procfs dir?\n",
-                       ldlm_ns_name(ns));
+	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_dirty_age_limit = tmp;
+
+	return count;
+}
+LUSTRE_RW_ATTR(dirty_age_limit);
+
+#ifdef HAVE_SERVER_SUPPORT
+static ssize_t ctime_age_limit_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_ctime_age_limit);
+}
+
+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,
+};
+
+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,
+};
+
+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
-		lprocfs_remove(&ns->ns_proc_dir_entry);
+		ldebugfs_remove(&ns->ns_debugfs_entry);
 
 	if (ns->ns_stats != NULL)
 		lprocfs_free_stats(&ns->ns_stats);
 }
 
-int ldlm_namespace_proc_register(struct ldlm_namespace *ns)
+void ldlm_namespace_sysfs_unregister(struct ldlm_namespace *ns)
 {
-	struct lprocfs_seq_vars lock_vars[2];
-        char lock_name[MAX_STRING_SIZE + 1];
-	struct proc_dir_entry *ns_pde;
-
-        LASSERT(ns != NULL);
-        LASSERT(ns->ns_rs_hash != NULL);
+	kobject_put(&ns->ns_kobj);
+	wait_for_completion(&ns->ns_kobj_unregister);
+}
 
-	if (ns->ns_proc_dir_entry != NULL) {
-		ns_pde = ns->ns_proc_dir_entry;
-	} else {
-		ns_pde = proc_mkdir(ldlm_ns_name(ns), ldlm_ns_proc_dir);
-		if (ns_pde == NULL)
-			return -ENOMEM;
-		ns->ns_proc_dir_entry = ns_pde;
-	}
+int ldlm_namespace_sysfs_register(struct ldlm_namespace *ns)
+{
+	int err;
 
-        ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
-        if (ns->ns_stats == NULL)
-                return -ENOMEM;
+	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));
 
-        lprocfs_counter_init(ns->ns_stats, LDLM_NSS_LOCKS,
-                             LPROCFS_CNTR_AVGMINMAX, "locks", "locks");
+	ns->ns_stats = lprocfs_alloc_stats(LDLM_NSS_LAST, 0);
+	if (!ns->ns_stats) {
+		kobject_put(&ns->ns_kobj);
+		return -ENOMEM;
+	}
 
-        lock_name[MAX_STRING_SIZE] = '\0';
+	lprocfs_counter_init(ns->ns_stats, LDLM_NSS_LOCKS,
+			     LPROCFS_CNTR_AVGMINMAX, "locks", "locks");
 
-        memset(lock_vars, 0, sizeof(lock_vars));
-        lock_vars[0].name = lock_name;
+	return err;
+}
 
-	ldlm_add_var(&lock_vars[0], ns_pde, "resource_count", ns,
-		     &lprocfs_ns_resources_fops);
-	ldlm_add_var(&lock_vars[0], ns_pde, "lock_count", ns,
-		     &lprocfs_ns_locks_fops);
+static int ldlm_namespace_debugfs_register(struct ldlm_namespace *ns)
+{
+	struct dentry *ns_entry;
 
-	if (ns_is_client(ns)) {
-		ldlm_add_var(&lock_vars[0], ns_pde, "lock_unused_count",
-			     &ns->ns_nr_unused, &ldlm_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "lru_size", ns,
-			     &lprocfs_lru_size_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "lru_max_age",
-			     &ns->ns_max_age, &ldlm_rw_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "early_lock_cancel",
-			     ns, &lprocfs_elc_fops);
+	if (!IS_ERR_OR_NULL(ns->ns_debugfs_entry)) {
+		ns_entry = ns->ns_debugfs_entry;
 	} else {
-		ldlm_add_var(&lock_vars[0], ns_pde, "ctime_age_limit",
-			     &ns->ns_ctime_age_limit, &ldlm_rw_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "lock_timeouts",
-			     &ns->ns_timeouts, &ldlm_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "max_nolock_bytes",
-			     &ns->ns_max_nolock_size, &ldlm_rw_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "contention_seconds",
-			     &ns->ns_contention_time, &ldlm_rw_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "contended_locks",
-			     &ns->ns_contended_locks, &ldlm_rw_uint_fops);
-		ldlm_add_var(&lock_vars[0], ns_pde, "max_parallel_ast",
-			     &ns->ns_max_parallel_ast, &ldlm_rw_uint_fops);
+		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
-#else /* LPROCFS */
-
-#define ldlm_namespace_proc_unregister(ns)      ({;})
-#define ldlm_namespace_proc_register(ns)        ({0;})
-
-#endif /* LPROCFS */
 
-static unsigned ldlm_res_hop_hash(cfs_hash_t *hs,
-                                  const void *key, unsigned mask)
+static unsigned ldlm_res_hop_hash(struct cfs_hash *hs,
+				  const void *key, unsigned int mask)
 {
-        const struct ldlm_res_id     *id  = key;
-        unsigned                val = 0;
-        unsigned                i;
+	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;
+	for (i = 0; i < RES_NAME_SIZE; i++)
+		val += id->name[i];
+	return val & mask;
 }
 
-static unsigned ldlm_res_hop_fid_hash(cfs_hash_t *hs,
+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;
+	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);
+	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 */
@@ -436,19 +799,19 @@ static unsigned ldlm_res_hop_fid_hash(cfs_hash_t *hs,
 
 static void *ldlm_res_hop_key(struct hlist_node *hnode)
 {
-        struct ldlm_resource   *res;
+	struct ldlm_resource   *res;
 
 	res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
-        return &res->lr_name;
+	return &res->lr_name;
 }
 
 static int ldlm_res_hop_keycmp(const void *key, struct hlist_node *hnode)
 {
-        struct ldlm_resource   *res;
+	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);
+	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)
@@ -456,167 +819,161 @@ 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(cfs_hash_t *hs, struct hlist_node *hnode)
+static void
+ldlm_res_hop_get_locked(struct cfs_hash *hs, struct hlist_node *hnode)
 {
-        struct ldlm_resource *res;
+	struct ldlm_resource *res;
 
 	res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
-        ldlm_resource_getref(res);
+	ldlm_resource_getref(res);
 }
 
-static void ldlm_res_hop_put_locked(cfs_hash_t *hs, struct hlist_node *hnode)
+static void ldlm_res_hop_put(struct cfs_hash *hs, struct hlist_node *hnode)
 {
-        struct ldlm_resource *res;
+	struct ldlm_resource *res;
 
 	res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
-        /* cfs_hash_for_each_nolock is the only chance we call it */
-        ldlm_resource_putref_locked(res);
+	ldlm_resource_putref(res);
 }
 
-static void ldlm_res_hop_put(cfs_hash_t *hs, struct hlist_node *hnode)
-{
-        struct ldlm_resource *res;
-
-	res = hlist_entry(hnode, struct ldlm_resource, lr_hash);
-        ldlm_resource_putref(res);
-}
-
-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 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
 };
 
-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 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_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;
+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;
+					  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);
@@ -628,45 +985,56 @@ struct ldlm_namespace *ldlm_namespace_new(struct obd_device *obd, char *name,
 	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 = 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);
+	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);
+	ldlm_put_ref();
+	RETURN(NULL);
 }
 EXPORT_SYMBOL(ldlm_namespace_new);
 
-extern struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
-
 /**
  * Cancel and destroy all locks on a resource.
  *
@@ -682,8 +1050,8 @@ static void cleanup_resource(struct ldlm_resource *res, struct list_head *q,
 	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;
+	do {
+		struct ldlm_lock *lock = NULL;
 
 		/* First, we look for non-cleaned-yet lock
 		 * all cleaned locks are marked by CLEANED flag. */
@@ -700,74 +1068,73 @@ static void cleanup_resource(struct ldlm_resource *res, struct list_head *q,
 			break;
 		}
 
-                if (lock == NULL) {
-                        unlock_res(res);
-                        break;
-                }
+		if (lock == NULL) {
+			unlock_res(res);
+			break;
+		}
 
-                /* Set CBPENDING so nothing in the cancellation path
+		/* Set CBPENDING so nothing in the cancellation path
 		 * can match this lock. */
 		ldlm_set_cbpending(lock);
 		ldlm_set_failed(lock);
-                lock->l_flags |= flags;
+		lock->l_flags |= flags;
 
-                /* ... without sending a CANCEL message for local_only. */
-                if (local_only)
+		/* ... 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 (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) {
-				schedule_timeout_and_set_state(
-					TASK_UNINTERRUPTIBLE,
-					cfs_time_seconds(4));
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule_timeout(cfs_time_seconds(4));
 				set_current_state(TASK_RUNNING);
 			}
-                        if (lock->l_completion_ast)
+			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_ASYNC);
-                        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,
+			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);
+	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_converting, flags);
-        cleanup_resource(res, &res->lr_waiting, flags);
+	cleanup_resource(res, &res->lr_granted, flags);
+	cleanup_resource(res, &res->lr_waiting, flags);
 
-        return 0;
+	return 0;
 }
 
-static int ldlm_resource_complain(cfs_hash_t *hs, cfs_hash_bd_t *bd,
+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);
@@ -778,7 +1145,8 @@ static int ldlm_resource_complain(cfs_hash_t *hs, cfs_hash_bd_t *bd,
 	       ldlm_ns_name(ldlm_res_to_ns(res)), PLDLMRES(res), res,
 	       atomic_read(&res->lr_refcount) - 1);
 
-	ldlm_resource_dump(D_ERROR, res);
+	/* Use D_NETERROR since it is in the default mask */
+	ldlm_resource_dump(D_NETERROR, res);
 	unlock_res(res);
 	return 0;
 }
@@ -792,14 +1160,16 @@ static int ldlm_resource_complain(cfs_hash_t *hs, cfs_hash_bd_t *bd,
  */
 int ldlm_namespace_cleanup(struct ldlm_namespace *ns, __u64 flags)
 {
-        if (ns == NULL) {
-                CDEBUG(D_INFO, "NULL ns, skipping cleanup\n");
-                return ELDLM_OK;
-        }
+	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);
-        cfs_hash_for_each_nolock(ns->ns_rs_hash, ldlm_resource_complain, NULL);
-        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);
 
@@ -866,36 +1236,38 @@ void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
                                struct obd_import *imp,
                                int force)
 {
-        int rc;
-        ENTRY;
-        if (!ns) {
-                EXIT;
-                return;
-        }
+	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;
+	/*
+	 * 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
@@ -904,11 +1276,11 @@ void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
  */
 void ldlm_namespace_free_post(struct ldlm_namespace *ns)
 {
-        ENTRY;
-        if (!ns) {
-                EXIT;
-                return;
-        }
+	ENTRY;
+	if (!ns) {
+		EXIT;
+		return;
+	}
 
 	/* Make sure that nobody can find this ns in its list. */
 	ldlm_namespace_unregister(ns, ns->ns_client);
@@ -917,16 +1289,20 @@ void ldlm_namespace_free_post(struct ldlm_namespace *ns)
 	 * Removing it after @dir may cause oops. */
 	ldlm_pool_fini(&ns->ns_pool);
 
-	ldlm_namespace_proc_unregister(ns);
+	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. */
+	 * 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.
@@ -947,11 +1323,11 @@ void ldlm_namespace_free_post(struct ldlm_namespace *ns)
  * 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);
 
@@ -959,10 +1335,9 @@ void ldlm_namespace_get(struct ldlm_namespace *ns)
 {
 	atomic_inc(&ns->ns_bref);
 }
-EXPORT_SYMBOL(ldlm_namespace_get);
 
 /* This is only for callers that care about refcount */
-int ldlm_namespace_get_return(struct ldlm_namespace *ns)
+static int ldlm_namespace_get_return(struct ldlm_namespace *ns)
 {
 	return atomic_inc_return(&ns->ns_bref);
 }
@@ -974,10 +1349,9 @@ void ldlm_namespace_put(struct ldlm_namespace *ns)
 		spin_unlock(&ns->ns_lock);
 	}
 }
-EXPORT_SYMBOL(ldlm_namespace_put);
 
 /** Register \a ns in the list of namespaces */
-void ldlm_namespace_register(struct ldlm_namespace *ns, ldlm_side_t client)
+void ldlm_namespace_register(struct ldlm_namespace *ns, enum ldlm_side client)
 {
 	mutex_lock(ldlm_namespace_lock(client));
 	LASSERT(list_empty(&ns->ns_list_chain));
@@ -987,7 +1361,7 @@ void ldlm_namespace_register(struct ldlm_namespace *ns, ldlm_side_t client)
 }
 
 /** Unregister \a ns from the list of namespaces. */
-void ldlm_namespace_unregister(struct ldlm_namespace *ns, ldlm_side_t client)
+void ldlm_namespace_unregister(struct ldlm_namespace *ns, enum ldlm_side client)
 {
 	mutex_lock(ldlm_namespace_lock(client));
 	LASSERT(!list_empty(&ns->ns_list_chain));
@@ -1001,7 +1375,7 @@ void ldlm_namespace_unregister(struct ldlm_namespace *ns, ldlm_side_t client)
 
 /** Should be called with ldlm_namespace_lock(client) taken. */
 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *ns,
-				       ldlm_side_t client)
+					  enum ldlm_side client)
 {
 	LASSERT(!list_empty(&ns->ns_list_chain));
 	LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
@@ -1010,7 +1384,7 @@ void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *ns,
 
 /** Should be called with ldlm_namespace_lock(client) taken. */
 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *ns,
-					 ldlm_side_t client)
+					    enum ldlm_side client)
 {
 	LASSERT(!list_empty(&ns->ns_list_chain));
 	LASSERT(mutex_is_locked(ldlm_namespace_lock(client)));
@@ -1019,7 +1393,7 @@ void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *ns,
 }
 
 /** Should be called with ldlm_namespace_lock(client) taken. */
-struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t client)
+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)));
@@ -1028,7 +1402,7 @@ struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t client)
 }
 
 /** Create and initialize new resource. */
-static struct ldlm_resource *ldlm_resource_new(void)
+static struct ldlm_resource *ldlm_resource_new(enum ldlm_type ldlm_type)
 {
 	struct ldlm_resource *res;
 	int idx;
@@ -1037,17 +1411,24 @@ static struct ldlm_resource *ldlm_resource_new(void)
 	if (res == NULL)
 		return NULL;
 
+	if (ldlm_type == LDLM_EXTENT) {
+		OBD_SLAB_ALLOC(res->lr_itree, ldlm_interval_tree_slab,
+			       sizeof(*res->lr_itree) * LCK_MODE_NUM);
+		if (res->lr_itree == NULL) {
+			OBD_SLAB_FREE_PTR(res, ldlm_resource_slab);
+			return NULL;
+		}
+		/* 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;
+		}
+	}
+
 	INIT_LIST_HEAD(&res->lr_granted);
-	INIT_LIST_HEAD(&res->lr_converting);
 	INIT_LIST_HEAD(&res->lr_waiting);
 
-	/* 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;
-	}
-
 	atomic_set(&res->lr_refcount, 1);
 	spin_lock_init(&res->lr_lock);
 	lu_ref_init(&res->lr_reference);
@@ -1068,23 +1449,24 @@ static struct ldlm_resource *ldlm_resource_new(void)
  */
 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)
+		  const struct ldlm_res_id *name, enum ldlm_type type,
+		  int create)
 {
 	struct hlist_node	*hnode;
 	struct ldlm_resource	*res = NULL;
-	cfs_hash_bd_t		bd;
+	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);
+	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);
+	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);
 	}
 
@@ -1096,14 +1478,13 @@ ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 
 	LASSERTF(type >= LDLM_MIN_TYPE && type < LDLM_MAX_TYPE,
 		 "type: %d\n", type);
-	res = ldlm_resource_new();
+	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;
-	res->lr_most_restr = LCK_NL;
+	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 :
@@ -1114,17 +1495,20 @@ ldlm_resource_get(struct ldlm_namespace *ns, struct ldlm_resource *parent,
 		cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
 		/* Clean lu_ref for failed resource. */
 		lu_ref_fini(&res->lr_reference);
+		if (res->lr_itree != NULL)
+			OBD_SLAB_FREE(res->lr_itree, ldlm_interval_tree_slab,
+				      sizeof(*res->lr_itree) * LCK_MODE_NUM);
 		OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *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);
+	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);
+	cfs_hash_bd_unlock(ns->ns_rs_hash, &bd, 1);
 
 	OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_CREATE_RESOURCE, 2);
 
@@ -1152,38 +1536,33 @@ struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res)
 	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;
+	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_converting)) {
-                ldlm_resource_dump(D_ERROR, res);
-                LBUG();
-        }
+		ldlm_resource_dump(D_ERROR, res);
+		LBUG();
+	}
 
 	if (!list_empty(&res->lr_waiting)) {
-                ldlm_resource_dump(D_ERROR, res);
-                LBUG();
-        }
+		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);
+	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;
+	struct cfs_hash_bd   bd;
 
 	LASSERT_ATOMIC_GT_LT(&res->lr_refcount, 0, LI_POISON);
 	CDEBUG(D_INFO, "putref res: %p count: %d\n",
@@ -1195,6 +1574,9 @@ int ldlm_resource_putref(struct ldlm_resource *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);
+		if (res->lr_itree != NULL)
+			OBD_SLAB_FREE(res->lr_itree, ldlm_interval_tree_slab,
+				      sizeof(*res->lr_itree) * LCK_MODE_NUM);
 		OBD_SLAB_FREE(res, ldlm_resource_slab, sizeof *res);
 		return 1;
 	}
@@ -1202,46 +1584,15 @@ int ldlm_resource_putref(struct ldlm_resource *res)
 }
 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)
-{
-	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, atomic_read(&res->lr_refcount) - 1);
-
-	if (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);
-
-		cfs_hash_bd_lock(ns->ns_rs_hash, &bd, 1);
-		return 1;
-	}
-	return 0;
-}
-
 /**
  * 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_lock *lock)
 {
 	check_res_locked(res);
 
-	LDLM_DEBUG(lock, "About to add this lock:\n");
+	LDLM_DEBUG(lock, "About to add this lock");
 
 	if (ldlm_is_destroyed(lock)) {
 		CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
@@ -1259,14 +1610,14 @@ void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
  * 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 (ldlm_is_destroyed(new)) {
 		CDEBUG(D_OTHER, "Lock destroyed, not adding to resource\n");
@@ -1281,57 +1632,57 @@ void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
 
 void ldlm_resource_unlink_lock(struct ldlm_lock *lock)
 {
-        int type = lock->l_resource->lr_type;
+	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);
+	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);
 	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;
 }
 
 /**
  * Print information about all locks in all namespaces on this node to debug
  * log.
  */
-void ldlm_dump_all_namespaces(ldlm_side_t client, int level)
+void ldlm_dump_all_namespaces(enum ldlm_side client, int level)
 {
 	struct list_head *tmp;
 
-        if (!((libcfs_debug | D_ERROR) & level))
-                return;
+	if (!((libcfs_debug | D_ERROR) & level))
+		return;
 
 	mutex_lock(ldlm_namespace_lock(client));
 
 	list_for_each(tmp, ldlm_namespace_list(client)) {
-                struct ldlm_namespace *ns;
+		struct ldlm_namespace *ns;
+
 		ns = list_entry(tmp, struct ldlm_namespace, ns_list_chain);
-                ldlm_namespace_dump(level, ns);
-        }
+		ldlm_namespace_dump(level, ns);
+	}
 
 	mutex_unlock(ldlm_namespace_lock(client));
 }
-EXPORT_SYMBOL(ldlm_dump_all_namespaces);
 
-static int ldlm_res_hash_dump(cfs_hash_t *hs, cfs_hash_bd_t *bd,
+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;
 }
 
 /**
@@ -1347,17 +1698,16 @@ void ldlm_namespace_dump(int level, struct ldlm_namespace *ns)
 	       ldlm_ns_name(ns), atomic_read(&ns->ns_bref),
 	       ns_is_client(ns) ? "client" : "server");
 
-	if (cfs_time_before(cfs_time_current(), ns->ns_next_dump))
+	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);
+				 (void *)(unsigned long)level, 0);
 	spin_lock(&ns->ns_lock);
-	ns->ns_next_dump = cfs_time_shift(10);
+	ns->ns_next_dump = ktime_get_seconds() + 10;
 	spin_unlock(&ns->ns_lock);
 }
-EXPORT_SYMBOL(ldlm_namespace_dump);
 
 /**
  * Print information about all locks in this resource to debug log.
@@ -1379,24 +1729,21 @@ void ldlm_resource_dump(int level, struct ldlm_resource *res)
 		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_converting)) {
-                CDEBUG(level, "Converting locks:\n");
-		list_for_each_entry(lock, &res->lr_converting, l_res_link)
-                        LDLM_DEBUG_LIMIT(level, lock, "###");
-        }
+			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");
+		CDEBUG(level, "Waiting locks:\n");
 		list_for_each_entry(lock, &res->lr_waiting, l_res_link)
-                        LDLM_DEBUG_LIMIT(level, lock, "###");
-        }
+			LDLM_DEBUG_LIMIT(level, lock, "###");
+	}
 }
 EXPORT_SYMBOL(ldlm_resource_dump);