[dm-devel] patch to dm.c to wakeup event waiters when map name changed

[goggin, edward]

Changed dm_hash_rename() to wake up any dm event waiters for
a mapped device after changing the name of the mapped device.


--- ../base/linux-2.6.14-rc4/drivers/md/dm-ioctl.c	2005-10-10
20:19:19.000000000 -0500
+++ drivers/md/dm-ioctl.c	2005-11-03 13:25:57.000000000 -0600
@@ -270,6 +270,7 @@ static int dm_hash_rename(const char *ol
 {
 	char *new_name, *old_name;
 	struct hash_cell *hc;
+	struct dm_table *table;
 
 	/*
 	 * duplicate new.
@@ -317,6 +318,15 @@ static int dm_hash_rename(const char *ol
 	/* rename the device node in devfs */
 	register_with_devfs(hc);
 
+	/*
+	 * Wakeup any dm event waiters.
+	 */
+	table = dm_get_table(hc->md);
+	if (table) {
+		dm_table_event(table);
+		dm_table_put(table);
+	}
+
 	up_write(&_hash_lock);
 	kfree(old_name);
 	return 0;