5 files changed, 61 insertions, 49 deletions

diff --git a/fs/dlm/dir.c b/fs/dlm/dir.c
index 600bb1d..ff97ba9 100644
--- a/fs/dlm/dir.c
+++ b/fs/dlm/dir.c
@@ -329,49 +329,47 @@ int dlm_dir_lookup(struct dlm_ls *ls, int nodeid, char *name, int namelen,
 	return get_entry(ls, nodeid, name, namelen, r_nodeid);
 }
 
-/* Copy the names of master rsb's into the buffer provided.
-   Only select names whose dir node is the given nodeid. */
+static struct dlm_rsb *find_rsb_root(struct dlm_ls *ls, char *name, int len)
+{
+	struct dlm_rsb *r;
+
+	down_read(&ls->ls_root_sem);
+	list_for_each_entry(r, &ls->ls_root_list, res_root_list) {
+		if (len == r->res_length && !memcmp(name, r->res_name, len)) {
+			up_read(&ls->ls_root_sem);
+			return r;
+		}
+	}
+	up_read(&ls->ls_root_sem);
+	return NULL;
+}
+
+/* Find the rsb where we left off (or start again), then send rsb names
+   for rsb's we're master of and whose directory node matches the requesting
+   node.  inbuf is the rsb name last sent, inlen is the name's length */
 
 void dlm_copy_master_names(struct dlm_ls *ls, char *inbuf, int inlen,
  			   char *outbuf, int outlen, int nodeid)
 {
 	struct list_head *list;
-	struct dlm_rsb *start_r = NULL, *r = NULL;
-	int offset = 0, start_namelen, error, dir_nodeid;
-	char *start_name;
+	struct dlm_rsb *r;
+	int offset = 0, dir_nodeid;
 	uint16_t be_namelen;
 
-	/*
-	 * Find the rsb where we left off (or start again)
-	 */
-
-	start_namelen = inlen;
-	start_name = inbuf;
-
-	if (start_namelen > 1) {
-		/*
-		 * We could also use a find_rsb_root() function here that
-		 * searched the ls_root_list.
-		 */
-		error = dlm_find_rsb(ls, start_name, start_namelen, R_MASTER,
-				     &start_r);
-		DLM_ASSERT(!error && start_r,
-			   printk("error %d\n", error););
-		DLM_ASSERT(!list_empty(&start_r->res_root_list),
-			   dlm_print_rsb(start_r););
-		dlm_put_rsb(start_r);
-	}
-
-	/*
-	 * Send rsb names for rsb's we're master of and whose directory node
-	 * matches the requesting node.
-	 */
-
 	down_read(&ls->ls_root_sem);
-	if (start_r)
-		list = start_r->res_root_list.next;
-	else
+
+	if (inlen > 1) {
+		r = find_rsb_root(ls, inbuf, inlen);
+		if (!r) {
+			inbuf[inlen - 1] = '\0';
+			log_error(ls, "copy_master_names from %d start %d %s",
+				  nodeid, inlen, inbuf);
+			goto out;
+		}
+		list = r->res_root_list.next;
+	} else {
 		list = ls->ls_root_list.next;
+	}
 
 	for (offset = 0; list != &ls->ls_root_list; list = list->next) {
 		r = list_entry(list, struct dlm_rsb, res_root_list);
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 7ee7c7c..ff4a198 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -489,12 +489,6 @@ static int find_rsb(struct dlm_ls *ls, char *name, int namelen,
 	return error;
 }
 
-int dlm_find_rsb(struct dlm_ls *ls, char *name, int namelen,
-		 unsigned int flags, struct dlm_rsb **r_ret)
-{
-	return find_rsb(ls, name, namelen, flags, r_ret);
-}
-
 /* This is only called to add a reference when the code already holds
    a valid reference to the rsb, so there's no need for locking. */
 
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index ada0468..27b6ed3 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -19,8 +19,6 @@ void dlm_print_lkb(struct dlm_lkb *lkb);
 void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms);
 void dlm_receive_buffer(struct dlm_header *hd, int nodeid);
 int dlm_modes_compat(int mode1, int mode2);
-int dlm_find_rsb(struct dlm_ls *ls, char *name, int namelen,
-	unsigned int flags, struct dlm_rsb **r_ret);
 void dlm_put_rsb(struct dlm_rsb *r);
 void dlm_hold_rsb(struct dlm_rsb *r);
 int dlm_put_lkb(struct dlm_lkb *lkb);
diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index 2f9d9a3..df075dc 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -731,6 +731,20 @@ int dlm_create_root_list(struct dlm_ls *ls)
 			list_add(&r->res_root_list, &ls->ls_root_list);
 			dlm_hold_rsb(r);
 		}
+
+		/* If we're using a directory, add tossed rsbs to the root
+		   list; they'll have entries created in the new directory,
+		   but no other recovery steps should do anything with them. */
+
+		if (dlm_no_directory(ls)) {
+			read_unlock(&ls->ls_rsbtbl[i].lock);
+			continue;
+		}
+
+		list_for_each_entry(r, &ls->ls_rsbtbl[i].toss, res_hashchain) {
+			list_add(&r->res_root_list, &ls->ls_root_list);
+			dlm_hold_rsb(r);
+		}
 		read_unlock(&ls->ls_rsbtbl[i].lock);
 	}
  out:
@@ -750,6 +764,11 @@ void dlm_release_root_list(struct dlm_ls *ls)
 	up_write(&ls->ls_root_sem);
 }
 
+/* If not using a directory, clear the entire toss list, there's no benefit to
+   caching the master value since it's fixed.  If we are using a dir, keep the
+   rsb's we're the master of.  Recovery will add them to the root list and from
+   there they'll be entered in the rebuilt directory. */
+
 void dlm_clear_toss_list(struct dlm_ls *ls)
 {
 	struct dlm_rsb *r, *safe;
@@ -759,8 +778,10 @@ void dlm_clear_toss_list(struct dlm_ls *ls)
 		write_lock(&ls->ls_rsbtbl[i].lock);
 		list_for_each_entry_safe(r, safe, &ls->ls_rsbtbl[i].toss,
 					 res_hashchain) {
-			list_del(&r->res_hashchain);
-			dlm_free_rsb(r);
+			if (dlm_no_directory(ls) || !is_master(r)) {
+				list_del(&r->res_hashchain);
+				dlm_free_rsb(r);
+			}
 		}
 		write_unlock(&ls->ls_rsbtbl[i].lock);
 	}
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index 4b89e20..997f953 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -67,17 +67,18 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
 	dlm_astd_resume();
 
 	/*
-	 * This list of root rsb's will be the basis of most of the recovery
-	 * routines.
+	 * Free non-master tossed rsb's.  Master rsb's are kept on toss
+	 * list and put on root list to be included in resdir recovery.
 	 */
 
-	dlm_create_root_list(ls);
+	dlm_clear_toss_list(ls);
 
 	/*
-	 * Free all the tossed rsb's so we don't have to recover them.
+	 * This list of root rsb's will be the basis of most of the recovery
+	 * routines.
 	 */
 
-	dlm_clear_toss_list(ls);
+	dlm_create_root_list(ls);
 
 	/*
 	 * Add or remove nodes from the lockspace's ls_nodes list.