Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm:
  dlm: linux/{dlm,dlm_device}.h: cleanup for userspace
  dlm: common max length definitions
  dlm: move plock code from gfs2
  dlm: recover nodes that are removed and re-added
  dlm: save master info after failed no-queue request
  dlm: make dlm_print_rsb() static
  dlm: match signedness between dlm_config_info and cluster_set

20 files changed, 276 insertions, 161 deletions

diff --git a/fs/dlm/Makefile b/fs/dlm/Makefile
index d248e60..ca1c912 100644
--- a/fs/dlm/Makefile
+++ b/fs/dlm/Makefile
@@ -10,6 +10,7 @@ dlm-y :=			ast.o \
 				midcomms.o \
 				netlink.o \
 				lowcomms.o \
+				plock.o \
 				rcom.o \
 				recover.o \
 				recoverd.o \
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index c3ad1df..eac23bd 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -114,7 +114,7 @@ struct cluster_attribute {
 };
 
 static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field,
-			   unsigned int *info_field, int check_zero,
+			   int *info_field, int check_zero,
 			   const char *buf, size_t len)
 {
 	unsigned int x;
@@ -284,6 +284,7 @@ struct node {
 	struct list_head list; /* space->members */
 	int nodeid;
 	int weight;
+	int new;
 };
 
 static struct configfs_group_operations clusters_ops = {
@@ -565,6 +566,7 @@ static struct config_item *make_node(struct config_group *g, const char *name)
 	config_item_init_type_name(&nd->item, name, &node_type);
 	nd->nodeid = -1;
 	nd->weight = 1;  /* default weight of 1 if none is set */
+	nd->new = 1;     /* set to 0 once it's been read by dlm_nodeid_list() */
 
 	mutex_lock(&sp->members_lock);
 	list_add(&nd->list, &sp->members);
@@ -805,12 +807,13 @@ static void put_comm(struct comm *cm)
 }
 
 /* caller must free mem */
-int dlm_nodeid_list(char *lsname, int **ids_out)
+int dlm_nodeid_list(char *lsname, int **ids_out, int *ids_count_out,
+		    int **new_out, int *new_count_out)
 {
 	struct space *sp;
 	struct node *nd;
-	int i = 0, rv = 0;
-	int *ids;
+	int i = 0, rv = 0, ids_count = 0, new_count = 0;
+	int *ids, *new;
 
 	sp = get_space(lsname);
 	if (!sp)
@@ -818,23 +821,50 @@ int dlm_nodeid_list(char *lsname, int **ids_out)
 
 	mutex_lock(&sp->members_lock);
 	if (!sp->members_count) {
-		rv = 0;
+		rv = -EINVAL;
+		printk(KERN_ERR "dlm: zero members_count\n");
 		goto out;
 	}
 
-	ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL);
+	ids_count = sp->members_count;
+
+	ids = kcalloc(ids_count, sizeof(int), GFP_KERNEL);
 	if (!ids) {
 		rv = -ENOMEM;
 		goto out;
 	}
 
-	rv = sp->members_count;
-	list_for_each_entry(nd, &sp->members, list)
+	list_for_each_entry(nd, &sp->members, list) {
 		ids[i++] = nd->nodeid;
+		if (nd->new)
+			new_count++;
+	}
+
+	if (ids_count != i)
+		printk(KERN_ERR "dlm: bad nodeid count %d %d\n", ids_count, i);
+
+	if (!new_count)
+		goto out_ids;
+
+	new = kcalloc(new_count, sizeof(int), GFP_KERNEL);
+	if (!new) {
+		kfree(ids);
+		rv = -ENOMEM;
+		goto out;
+	}
 
-	if (rv != i)
-		printk("bad nodeid count %d %d\n", rv, i);
+	i = 0;
+	list_for_each_entry(nd, &sp->members, list) {
+		if (nd->new) {
+			new[i++] = nd->nodeid;
+			nd->new = 0;
+		}
+	}
+	*new_count_out = new_count;
+	*new_out = new;
 
+ out_ids:
+	*ids_count_out = ids_count;
 	*ids_out = ids;
  out:
 	mutex_unlock(&sp->members_lock);
diff --git a/fs/dlm/config.h b/fs/dlm/config.h
index a3170fe..4f1d6fc 100644
--- a/fs/dlm/config.h
+++ b/fs/dlm/config.h
@@ -35,7 +35,8 @@ extern struct dlm_config_info dlm_config;
 int dlm_config_init(void);
 void dlm_config_exit(void);
 int dlm_node_weight(char *lsname, int nodeid);
-int dlm_nodeid_list(char *lsname, int **ids_out);
+int dlm_nodeid_list(char *lsname, int **ids_out, int *ids_count_out,
+		    int **new_out, int *new_count_out);
 int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr);
 int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid);
 int dlm_our_nodeid(void);
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 7a8824f4..5a7ac33 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -42,8 +42,6 @@
 #include <linux/dlm.h>
 #include "config.h"
 
-#define DLM_LOCKSPACE_LEN	64
-
 /* Size of the temp buffer midcomms allocates on the stack.
    We try to make this large enough so most messages fit.
    FIXME: should sctp make this unnecessary? */
@@ -132,8 +130,10 @@ struct dlm_member {
 
 struct dlm_recover {
 	struct list_head	list;
-	int			*nodeids;
+	int			*nodeids;   /* nodeids of all members */
 	int			node_count;
+	int			*new;       /* nodeids of new members */
+	int			new_count;
 	uint64_t		seq;
 };
 
@@ -579,6 +579,8 @@ static inline int dlm_no_directory(struct dlm_ls *ls)
 int dlm_netlink_init(void);
 void dlm_netlink_exit(void);
 void dlm_timeout_warn(struct dlm_lkb *lkb);
+int dlm_plock_init(void);
+void dlm_plock_exit(void);
 
 #ifdef CONFIG_DLM_DEBUG
 int dlm_register_debugfs(void);
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 8f250ac..2d3d102 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -165,7 +165,7 @@ void dlm_print_lkb(struct dlm_lkb *lkb)
 	       lkb->lkb_grmode, lkb->lkb_wait_type, lkb->lkb_ast_type);
 }
 
-void dlm_print_rsb(struct dlm_rsb *r)
+static void dlm_print_rsb(struct dlm_rsb *r)
 {
 	printk(KERN_ERR "rsb: nodeid %d flags %lx first %x rlc %d name %s\n",
 	       r->res_nodeid, r->res_flags, r->res_first_lkid,
@@ -1956,8 +1956,7 @@ static void confirm_master(struct dlm_rsb *r, int error)
 			list_del_init(&lkb->lkb_rsb_lookup);
 			r->res_first_lkid = lkb->lkb_id;
 			_request_lock(r, lkb);
-		} else
-			r->res_nodeid = -1;
+		}
 		break;
 
 	default:
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index 05d9c82..88e93c8 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -13,7 +13,6 @@
 #ifndef __LOCK_DOT_H__
 #define __LOCK_DOT_H__
 
-void dlm_print_rsb(struct dlm_rsb *r);
 void dlm_dump_rsb(struct dlm_rsb *r);
 void dlm_print_lkb(struct dlm_lkb *lkb);
 void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms);
diff --git a/fs/dlm/main.c b/fs/dlm/main.c
index 58487fb..b80e0aa 100644
--- a/fs/dlm/main.c
+++ b/fs/dlm/main.c
@@ -46,10 +46,16 @@ static int __init init_dlm(void)
 	if (error)
 		goto out_user;
 
+	error = dlm_plock_init();
+	if (error)
+		goto out_netlink;
+
 	printk("DLM (built %s %s) installed\n", __DATE__, __TIME__);
 
 	return 0;
 
+ out_netlink:
+	dlm_netlink_exit();
  out_user:
 	dlm_user_exit();
  out_debug:
@@ -66,6 +72,7 @@ static int __init init_dlm(void)
 
 static void __exit exit_dlm(void)
 {
+	dlm_plock_exit();
 	dlm_netlink_exit();
 	dlm_user_exit();
 	dlm_config_exit();
diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index fa17f5a..26133f0 100644
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -210,6 +210,23 @@ int dlm_recover_members(struct dlm_ls *ls, struct dlm_recover *rv, int *neg_out)
 		}
 	}
 
+	/* Add an entry to ls_nodes_gone for members that were removed and
+	   then added again, so that previous state for these nodes will be
+	   cleared during recovery. */
+
+	for (i = 0; i < rv->new_count; i++) {
+		if (!dlm_is_member(ls, rv->new[i]))
+			continue;
+		log_debug(ls, "new nodeid %d is a re-added member", rv->new[i]);
+
+		memb = kzalloc(sizeof(struct dlm_member), GFP_KERNEL);
+		if (!memb)
+			return -ENOMEM;
+		memb->nodeid = rv->new[i];
+		list_add_tail(&memb->list, &ls->ls_nodes_gone);
+		neg++;
+	}
+
 	/* add new members to ls_nodes */
 
 	for (i = 0; i < rv->node_count; i++) {
@@ -314,15 +331,16 @@ int dlm_ls_stop(struct dlm_ls *ls)
 int dlm_ls_start(struct dlm_ls *ls)
 {
 	struct dlm_recover *rv = NULL, *rv_old;
-	int *ids = NULL;
-	int error, count;
+	int *ids = NULL, *new = NULL;
+	int error, ids_count = 0, new_count = 0;
 
 	rv = kzalloc(sizeof(struct dlm_recover), GFP_KERNEL);
 	if (!rv)
 		return -ENOMEM;
 
-	error = count = dlm_nodeid_list(ls->ls_name, &ids);
-	if (error <= 0)
+	error = dlm_nodeid_list(ls->ls_name, &ids, &ids_count,
+				&new, &new_count);
+	if (error < 0)
 		goto fail;
 
 	spin_lock(&ls->ls_recover_lock);
@@ -337,14 +355,19 @@ int dlm_ls_start(struct dlm_ls *ls)
 	}
 
 	rv->nodeids = ids;
-	rv->node_count = count;
+	rv->node_count = ids_count;
+	rv->new = new;
+	rv->new_count = new_count;
 	rv->seq = ++ls->ls_recover_seq;
 	rv_old = ls->ls_recover_args;
 	ls->ls_recover_args = rv;
 	spin_unlock(&ls->ls_recover_lock);
 
 	if (rv_old) {
+		log_error(ls, "unused recovery %llx %d",
+			  (unsigned long long)rv_old->seq, rv_old->node_count);
 		kfree(rv_old->nodeids);
+		kfree(rv_old->new);
 		kfree(rv_old);
 	}
 
@@ -354,6 +377,7 @@ int dlm_ls_start(struct dlm_ls *ls)
  fail:
 	kfree(rv);
 	kfree(ids);
+	kfree(new);
 	return error;
 }
 
diff --git a/fs/gfs2/locking/dlm/plock.c b/fs/dlm/plock.c
index 2ebd374..d6d6e37 100644
--- a/fs/gfs2/locking/dlm/plock.c
+++ b/fs/dlm/plock.c
@@ -1,17 +1,19 @@
 /*
- * Copyright (C) 2005 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
  * of the GNU General Public License version 2.
  */
 
+#include <linux/fs.h>
 #include <linux/miscdevice.h>
-#include <linux/lock_dlm_plock.h>
 #include <linux/poll.h>
+#include <linux/dlm.h>
+#include <linux/dlm_plock.h>
 
-#include "lock_dlm.h"
-
+#include "dlm_internal.h"
+#include "lockspace.h"
 
 static spinlock_t ops_lock;
 static struct list_head send_list;
@@ -22,7 +24,7 @@ static wait_queue_head_t recv_wq;
 struct plock_op {
 	struct list_head list;
 	int done;
-	struct gdlm_plock_info info;
+	struct dlm_plock_info info;
 };
 
 struct plock_xop {
@@ -34,22 +36,22 @@ struct plock_xop {
 };
 
 
-static inline void set_version(struct gdlm_plock_info *info)
+static inline void set_version(struct dlm_plock_info *info)
 {
-	info->version[0] = GDLM_PLOCK_VERSION_MAJOR;
-	info->version[1] = GDLM_PLOCK_VERSION_MINOR;
-	info->version[2] = GDLM_PLOCK_VERSION_PATCH;
+	info->version[0] = DLM_PLOCK_VERSION_MAJOR;
+	info->version[1] = DLM_PLOCK_VERSION_MINOR;
+	info->version[2] = DLM_PLOCK_VERSION_PATCH;
 }
 
-static int check_version(struct gdlm_plock_info *info)
+static int check_version(struct dlm_plock_info *info)
 {
-	if ((GDLM_PLOCK_VERSION_MAJOR != info->version[0]) ||
-	    (GDLM_PLOCK_VERSION_MINOR < info->version[1])) {
-		log_error("plock device version mismatch: "
+	if ((DLM_PLOCK_VERSION_MAJOR != info->version[0]) ||
+	    (DLM_PLOCK_VERSION_MINOR < info->version[1])) {
+		log_print("plock device version mismatch: "
 			  "kernel (%u.%u.%u), user (%u.%u.%u)",
-			  GDLM_PLOCK_VERSION_MAJOR,
-			  GDLM_PLOCK_VERSION_MINOR,
-			  GDLM_PLOCK_VERSION_PATCH,
+			  DLM_PLOCK_VERSION_MAJOR,
+			  DLM_PLOCK_VERSION_MINOR,
+			  DLM_PLOCK_VERSION_PATCH,
 			  info->version[0],
 			  info->version[1],
 			  info->version[2]);
@@ -68,25 +70,31 @@ static void send_op(struct plock_op *op)
 	wake_up(&send_wq);
 }
 
-int gdlm_plock(void *lockspace, struct lm_lockname *name,
-	       struct file *file, int cmd, struct file_lock *fl)
+int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
+		   int cmd, struct file_lock *fl)
 {
-	struct gdlm_ls *ls = lockspace;
+	struct dlm_ls *ls;
 	struct plock_op *op;
 	struct plock_xop *xop;
 	int rv;
 
+	ls = dlm_find_lockspace_local(lockspace);
+	if (!ls)
+		return -EINVAL;
+
 	xop = kzalloc(sizeof(*xop), GFP_KERNEL);
-	if (!xop)
-		return -ENOMEM;
+	if (!xop) {
+		rv = -ENOMEM;
+		goto out;
+	}
 
 	op = &xop->xop;
-	op->info.optype		= GDLM_PLOCK_OP_LOCK;
+	op->info.optype		= DLM_PLOCK_OP_LOCK;
 	op->info.pid		= fl->fl_pid;
 	op->info.ex		= (fl->fl_type == F_WRLCK);
 	op->info.wait		= IS_SETLKW(cmd);
-	op->info.fsid		= ls->id;
-	op->info.number		= name->ln_number;
+	op->info.fsid		= ls->ls_global_id;
+	op->info.number		= number;
 	op->info.start		= fl->fl_start;
 	op->info.end		= fl->fl_end;
 	if (fl->fl_lmops && fl->fl_lmops->fl_grant) {
@@ -107,12 +115,15 @@ int gdlm_plock(void *lockspace, struct lm_lockname *name,
 
 	if (xop->callback == NULL)
 		wait_event(recv_wq, (op->done != 0));
-	else
-		return -EINPROGRESS;
+	else {
+		rv = -EINPROGRESS;
+		goto out;
+	}
 
 	spin_lock(&ops_lock);
 	if (!list_empty(&op->list)) {
-		printk(KERN_INFO "plock op on list\n");
+		log_error(ls, "dlm_posix_lock: op on list %llx",
+			  (unsigned long long)number);
 		list_del(&op->list);
 	}
 	spin_unlock(&ops_lock);
@@ -121,17 +132,19 @@ int gdlm_plock(void *lockspace, struct lm_lockname *name,
 
 	if (!rv) {
 		if (posix_lock_file_wait(file, fl) < 0)
-			log_error("gdlm_plock: vfs lock error %x,%llx",
-				  name->ln_type,
-				  (unsigned long long)name->ln_number);
+			log_error(ls, "dlm_posix_lock: vfs lock error %llx",
+				  (unsigned long long)number);
 	}
 
 	kfree(xop);
+out:
+	dlm_put_lockspace(ls);
 	return rv;
 }
+EXPORT_SYMBOL_GPL(dlm_posix_lock);
 
 /* Returns failure iff a succesful lock operation should be canceled */
-static int gdlm_plock_callback(struct plock_op *op)
+static int dlm_plock_callback(struct plock_op *op)
 {
 	struct file *file;
 	struct file_lock *fl;
@@ -142,7 +155,8 @@ static int gdlm_plock_callback(struct plock_op *op)
 
 	spin_lock(&ops_lock);
 	if (!list_empty(&op->list)) {
-		printk(KERN_INFO "plock op on list\n");
+		log_print("dlm_plock_callback: op on list %llx",
+			  (unsigned long long)op->info.number);
 		list_del(&op->list);
 	}
 	spin_unlock(&ops_lock);
@@ -165,19 +179,19 @@ static int gdlm_plock_callback(struct plock_op *op)
 		 * This can only happen in the case of kmalloc() failure.
 		 * The filesystem's own lock is the authoritative lock,
 		 * so a failure to get the lock locally is not a disaster.
-		 * As long as GFS cannot reliably cancel locks (especially
+		 * As long as the fs cannot reliably cancel locks (especially
 		 * in a low-memory situation), we're better off ignoring
 		 * this failure than trying to recover.
 		 */
-		log_error("gdlm_plock: vfs lock error file %p fl %p",
-				file, fl);
+		log_print("dlm_plock_callback: vfs lock error %llx file %p fl %p",
+			  (unsigned long long)op->info.number, file, fl);
 	}
 
 	rv = notify(flc, NULL, 0);
 	if (rv) {
 		/* XXX: We need to cancel the fs lock here: */
-		printk("gfs2 lock granted after lock request failed;"
-						" dangling lock!\n");
+		log_print("dlm_plock_callback: lock granted after lock request "
+			  "failed; dangling lock!\n");
 		goto out;
 	}
 
@@ -186,25 +200,31 @@ out:
 	return rv;
 }
 
-int gdlm_punlock(void *lockspace, struct lm_lockname *name,
-		 struct file *file, struct file_lock *fl)
+int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
+		     struct file_lock *fl)
 {
-	struct gdlm_ls *ls = lockspace;
+	struct dlm_ls *ls;
 	struct plock_op *op;
 	int rv;
 
+	ls = dlm_find_lockspace_local(lockspace);
+	if (!ls)
+		return -EINVAL;
+
 	op = kzalloc(sizeof(*op), GFP_KERNEL);
-	if (!op)
-		return -ENOMEM;
+	if (!op) {
+		rv = -ENOMEM;
+		goto out;
+	}
 
 	if (posix_lock_file_wait(file, fl) < 0)
-		log_error("gdlm_punlock: vfs unlock error %x,%llx",
-			  name->ln_type, (unsigned long long)name->ln_number);
+		log_error(ls, "dlm_posix_unlock: vfs unlock error %llx",
+			  (unsigned long long)number);
 
-	op->info.optype		= GDLM_PLOCK_OP_UNLOCK;
+	op->info.optype		= DLM_PLOCK_OP_UNLOCK;
 	op->info.pid		= fl->fl_pid;
-	op->info.fsid		= ls->id;
-	op->info.number		= name->ln_number;
+	op->info.fsid		= ls->ls_global_id;
+	op->info.number		= number;
 	op->info.start		= fl->fl_start;
 	op->info.end		= fl->fl_end;
 	if (fl->fl_lmops && fl->fl_lmops->fl_grant)
@@ -217,7 +237,8 @@ int gdlm_punlock(void *lockspace, struct lm_lockname *name,
 
 	spin_lock(&ops_lock);
 	if (!list_empty(&op->list)) {
-		printk(KERN_INFO "punlock op on list\n");
+		log_error(ls, "dlm_posix_unlock: op on list %llx",
+			  (unsigned long long)number);
 		list_del(&op->list);
 	}
 	spin_unlock(&ops_lock);
@@ -228,25 +249,34 @@ int gdlm_punlock(void *lockspace, struct lm_lockname *name,
 		rv = 0;
 
 	kfree(op);
+out:
+	dlm_put_lockspace(ls);
 	return rv;
 }
+EXPORT_SYMBOL_GPL(dlm_posix_unlock);
 
-int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
-		   struct file *file, struct file_lock *fl)
+int dlm_posix_get(dlm_lockspace_t *lockspace, u64 number, struct file *file,
+		  struct file_lock *fl)
 {
-	struct gdlm_ls *ls = lockspace;
+	struct dlm_ls *ls;
 	struct plock_op *op;
 	int rv;
 
+	ls = dlm_find_lockspace_local(lockspace);
+	if (!ls)
+		return -EINVAL;
+
 	op = kzalloc(sizeof(*op), GFP_KERNEL);
-	if (!op)
-		return -ENOMEM;
+	if (!op) {
+		rv = -ENOMEM;
+		goto out;
+	}
 
-	op->info.optype		= GDLM_PLOCK_OP_GET;
+	op->info.optype		= DLM_PLOCK_OP_GET;
 	op->info.pid		= fl->fl_pid;
 	op->info.ex		= (fl->fl_type == F_WRLCK);
-	op->info.fsid		= ls->id;
-	op->info.number		= name->ln_number;
+	op->info.fsid		= ls->ls_global_id;
+	op->info.number		= number;
 	op->info.start		= fl->fl_start;
 	op->info.end		= fl->fl_end;
 	if (fl->fl_lmops && fl->fl_lmops->fl_grant)
@@ -259,7 +289,8 @@ int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
 
 	spin_lock(&ops_lock);
 	if (!list_empty(&op->list)) {
-		printk(KERN_INFO "plock_get op on list\n");
+		log_error(ls, "dlm_posix_get: op on list %llx",
+			  (unsigned long long)number);
 		list_del(&op->list);
 	}
 	spin_unlock(&ops_lock);
@@ -281,14 +312,17 @@ int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
 	}
 
 	kfree(op);
+out:
+	dlm_put_lockspace(ls);
 	return rv;
 }
+EXPORT_SYMBOL_GPL(dlm_posix_get);
 
 /* a read copies out one plock request from the send list */
 static ssize_t dev_read(struct file *file, char __user *u, size_t count,
 			loff_t *ppos)
 {
-	struct gdlm_plock_info info;
+	struct dlm_plock_info info;
 	struct plock_op *op = NULL;
 
 	if (count < sizeof(info))
@@ -315,7 +349,7 @@ static ssize_t dev_read(struct file *file, char __user *u, size_t count,
 static ssize_t dev_write(struct file *file, const char __user *u, size_t count,
 			 loff_t *ppos)
 {
-	struct gdlm_plock_info info;
+	struct dlm_plock_info info;
 	struct plock_op *op;
 	int found = 0;
 
@@ -345,12 +379,12 @@ static ssize_t dev_write(struct file *file, const char __user *u, size_t count,
 		struct plock_xop *xop;
 		xop = (struct plock_xop *)op;
 		if (xop->callback)
-			count = gdlm_plock_callback(op);
+			count = dlm_plock_callback(op);
 		else
 			wake_up(&recv_wq);
 	} else
-		printk(KERN_INFO "gdlm dev_write no op %x %llx\n", info.fsid,
-			(unsigned long long)info.number);
+		log_print("dev_write no op %x %llx", info.fsid,
+			  (unsigned long long)info.number);
 	return count;
 }
 
@@ -377,11 +411,11 @@ static const struct file_operations dev_fops = {
 
 static struct miscdevice plock_dev_misc = {
 	.minor = MISC_DYNAMIC_MINOR,
-	.name = GDLM_PLOCK_MISC_NAME,
+	.name = DLM_PLOCK_MISC_NAME,
 	.fops = &dev_fops
 };
 
-int gdlm_plock_init(void)
+int dlm_plock_init(void)
 {
 	int rv;
 
@@ -393,14 +427,13 @@ int gdlm_plock_init(void)
 
 	rv = misc_register(&plock_dev_misc);
 	if (rv)
-		printk(KERN_INFO "gdlm_plock_init: misc_register failed %d",
-		       rv);
+		log_print("dlm_plock_init: misc_register failed %d", rv);
 	return rv;
 }
 
-void gdlm_plock_exit(void)
+void dlm_plock_exit(void)
 {
 	if (misc_deregister(&plock_dev_misc) < 0)
-		printk(KERN_INFO "gdlm_plock_exit: misc_deregister failed");
+		log_print("dlm_plock_exit: misc_deregister failed");
 }
 
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index 997f953..fd677c8 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -257,6 +257,7 @@ static void do_ls_recovery(struct dlm_ls *ls)
 	if (rv) {
 		ls_recover(ls, rv);
 		kfree(rv->nodeids);
+		kfree(rv->new);
 		kfree(rv);
 	}
 }
diff --git a/fs/gfs2/locking/dlm/Makefile b/fs/gfs2/locking/dlm/Makefile
index 89b93b6b..2609bb6 100644
--- a/fs/gfs2/locking/dlm/Makefile
+++ b/fs/gfs2/locking/dlm/Makefile
@@ -1,3 +1,3 @@
 obj-$(CONFIG_GFS2_FS_LOCKING_DLM) += lock_dlm.o
-lock_dlm-y := lock.o main.o mount.o sysfs.o thread.o plock.o
+lock_dlm-y := lock.o main.o mount.o sysfs.o thread.o
 
diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h
index 58fcf8c..a243cf6 100644
--- a/fs/gfs2/locking/dlm/lock_dlm.h
+++ b/fs/gfs2/locking/dlm/lock_dlm.h
@@ -25,6 +25,7 @@
 #include <net/sock.h>
 
 #include <linux/dlm.h>
+#include <linux/dlm_plock.h>
 #include <linux/lm_interface.h>
 
 /*
@@ -173,17 +174,6 @@ void gdlm_cancel(void *);
 int gdlm_hold_lvb(void *, char **);
 void gdlm_unhold_lvb(void *, char *);
 
-/* plock.c */
-
-int gdlm_plock_init(void);
-void gdlm_plock_exit(void);
-int gdlm_plock(void *, struct lm_lockname *, struct file *, int,
-		struct file_lock *);
-int gdlm_plock_get(void *, struct lm_lockname *, struct file *,
-		struct file_lock *);
-int gdlm_punlock(void *, struct lm_lockname *, struct file *,
-		struct file_lock *);
-
 /* mount.c */
 
 extern const struct lm_lockops gdlm_ops;
diff --git a/fs/gfs2/locking/dlm/main.c b/fs/gfs2/locking/dlm/main.c
index 36a2258..b9a03a7 100644
--- a/fs/gfs2/locking/dlm/main.c
+++ b/fs/gfs2/locking/dlm/main.c
@@ -28,13 +28,6 @@ static int __init init_lock_dlm(void)
 		return error;
 	}
 
-	error = gdlm_plock_init();
-	if (error) {
-		gdlm_sysfs_exit();
-		gfs2_unregister_lockproto(&gdlm_ops);
-		return error;
-	}
-
 	printk(KERN_INFO
 	       "Lock_DLM (built %s %s) installed\n", __DATE__, __TIME__);
 	return 0;
@@ -42,7 +35,6 @@ static int __init init_lock_dlm(void)
 
 static void __exit exit_lock_dlm(void)
 {
-	gdlm_plock_exit();
 	gdlm_sysfs_exit();
 	gfs2_unregister_lockproto(&gdlm_ops);
 }
diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
index f2efff4..470bdf6 100644
--- a/fs/gfs2/locking/dlm/mount.c
+++ b/fs/gfs2/locking/dlm/mount.c
@@ -236,6 +236,27 @@ static void gdlm_withdraw(void *lockspace)
 	gdlm_kobject_release(ls);
 }
 
+static int gdlm_plock(void *lockspace, struct lm_lockname *name,
+	       struct file *file, int cmd, struct file_lock *fl)
+{
+	struct gdlm_ls *ls = lockspace;
+	return dlm_posix_lock(ls->dlm_lockspace, name->ln_number, file, cmd, fl);
+}
+
+static int gdlm_punlock(void *lockspace, struct lm_lockname *name,
+		 struct file *file, struct file_lock *fl)
+{
+	struct gdlm_ls *ls = lockspace;
+	return dlm_posix_unlock(ls->dlm_lockspace, name->ln_number, file, fl);
+}
+
+static int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
+		   struct file *file, struct file_lock *fl)
+{
+	struct gdlm_ls *ls = lockspace;
+	return dlm_posix_get(ls->dlm_lockspace, name->ln_number, file, fl);
+}
+
 const struct lm_lockops gdlm_ops = {
 	.lm_proto_name = "lock_dlm",
 	.lm_mount = gdlm_mount,
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 97a88b2..cbb5ccb 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -100,7 +100,7 @@ header-y += ixjuser.h
 header-y += jffs2.h
 header-y += keyctl.h
 header-y += limits.h
-header-y += lock_dlm_plock.h
+header-y += dlm_plock.h
 header-y += magic.h
 header-y += major.h
 header-y += matroxfb.h
diff --git a/include/linux/dlm.h b/include/linux/dlm.h
index c743fbc..203a025 100644
--- a/include/linux/dlm.h
+++ b/include/linux/dlm.h
@@ -21,10 +21,7 @@
 
 /* Lock levels and flags are here */
 #include <linux/dlmconstants.h>
-
-
-#define DLM_RESNAME_MAXLEN	64
-
+#include <linux/types.h>
 
 typedef void dlm_lockspace_t;
 
@@ -63,7 +60,7 @@ typedef void dlm_lockspace_t;
 
 struct dlm_lksb {
 	int 	 sb_status;
-	uint32_t sb_lkid;
+	__u32	 sb_lkid;
 	char 	 sb_flags;
 	char *	 sb_lvbptr;
 };
diff --git a/include/linux/dlm_device.h b/include/linux/dlm_device.h
index 9642277..c603450 100644
--- a/include/linux/dlm_device.h
+++ b/include/linux/dlm_device.h
@@ -11,10 +11,16 @@
 *******************************************************************************
 ******************************************************************************/
 
+#ifndef _LINUX_DLM_DEVICE_H
+#define _LINUX_DLM_DEVICE_H
+
 /* This is the device interface for dlm, most users will use a library
  * interface.
  */
 
+#include <linux/dlm.h>
+#include <linux/types.h>
+
 #define DLM_USER_LVB_LEN	32
 
 /* Version of the device interface */
@@ -94,10 +100,9 @@ struct dlm_lock_result {
 #define DLM_USER_PURGE        6
 #define DLM_USER_DEADLOCK     7
 
-/* Arbitrary length restriction */
-#define MAX_LS_NAME_LEN 64
-
 /* Lockspace flags */
 #define DLM_USER_LSFLG_AUTOFREE   1
 #define DLM_USER_LSFLG_FORCEFREE  2
 
+#endif
+
diff --git a/include/linux/dlm_plock.h b/include/linux/dlm_plock.h
new file mode 100644
index 0000000..18d5fdb
--- /dev/null
+++ b/include/linux/dlm_plock.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ */
+
+#ifndef __DLM_PLOCK_DOT_H__
+#define __DLM_PLOCK_DOT_H__
+
+#define DLM_PLOCK_MISC_NAME		"dlm_plock"
+
+#define DLM_PLOCK_VERSION_MAJOR	1
+#define DLM_PLOCK_VERSION_MINOR	1
+#define DLM_PLOCK_VERSION_PATCH	0
+
+enum {
+	DLM_PLOCK_OP_LOCK = 1,
+	DLM_PLOCK_OP_UNLOCK,
+	DLM_PLOCK_OP_GET,
+};
+
+struct dlm_plock_info {
+	__u32 version[3];
+	__u8 optype;
+	__u8 ex;
+	__u8 wait;
+	__u8 pad;
+	__u32 pid;
+	__s32 nodeid;
+	__s32 rv;
+	__u32 fsid;
+	__u64 number;
+	__u64 start;
+	__u64 end;
+	__u64 owner;
+};
+
+#ifdef __KERNEL__
+int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
+		int cmd, struct file_lock *fl);
+int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
+		struct file_lock *fl);
+int dlm_posix_get(dlm_lockspace_t *lockspace, u64 number, struct file *file,
+		struct file_lock *fl);
+#endif /* __KERNEL__ */
+
+#endif
+
diff --git a/include/linux/dlmconstants.h b/include/linux/dlmconstants.h
index fddb3d3..47bf08d 100644
--- a/include/linux/dlmconstants.h
+++ b/include/linux/dlmconstants.h
@@ -18,6 +18,10 @@
  * Constants used by DLM interface.
  */
 
+#define DLM_LOCKSPACE_LEN       64
+#define DLM_RESNAME_MAXLEN      64
+
+
 /*
  * Lock Modes
  */
diff --git a/include/linux/lock_dlm_plock.h b/include/linux/lock_dlm_plock.h
deleted file mode 100644
index fc34151..0000000
--- a/include/linux/lock_dlm_plock.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2005 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- */
-
-#ifndef __LOCK_DLM_PLOCK_DOT_H__
-#define __LOCK_DLM_PLOCK_DOT_H__
-
-#define GDLM_PLOCK_MISC_NAME		"lock_dlm_plock"
-
-#define GDLM_PLOCK_VERSION_MAJOR	1
-#define GDLM_PLOCK_VERSION_MINOR	1
-#define GDLM_PLOCK_VERSION_PATCH	0
-
-enum {
-	GDLM_PLOCK_OP_LOCK = 1,
-	GDLM_PLOCK_OP_UNLOCK,
-	GDLM_PLOCK_OP_GET,
-};
-
-struct gdlm_plock_info {
-	__u32 version[3];
-	__u8 optype;
-	__u8 ex;
-	__u8 wait;
-	__u8 pad;
-	__u32 pid;
-	__s32 nodeid;
-	__s32 rv;
-	__u32 fsid;
-	__u64 number;
-	__u64 start;
-	__u64 end;
-	__u64 owner;
-};
-
-#endif
-