diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 3adacdf..974fecc 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -26,7 +26,10 @@
 #define BR_PORT_BITS	10
 #define BR_MAX_PORTS	(1<<BR_PORT_BITS)
 
-#define BR_VERSION	"2.2"
+#define BR_VERSION	"2.3"
+
+/* Path to usermode spanning tree program */
+#define BR_STP_PROG	"/sbin/bridge-stp"
 
 typedef struct bridge_id bridge_id;
 typedef struct mac_addr mac_addr;
@@ -107,7 +110,13 @@
 
 	u8				group_addr[ETH_ALEN];
 	u16				root_port;
-	unsigned char			stp_enabled;
+
+	enum {
+		BR_NO_STP, 		/* no spanning tree */
+		BR_KERNEL_STP,		/* old STP in kernel */
+		BR_USER_STP,		/* new RSTP in userspace */
+	} stp_enabled;
+
 	unsigned char			topology_change;
 	unsigned char			topology_change_detected;
 
@@ -127,7 +136,6 @@
 	return !memcmp(&br->bridge_id, &br->designated_root, 8);
 }
 
-
 /* br_device.c */
 extern void br_dev_setup(struct net_device *dev);
 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
@@ -209,6 +217,7 @@
 /* br_stp_if.c */
 extern void br_stp_enable_bridge(struct net_bridge *br);
 extern void br_stp_disable_bridge(struct net_bridge *br);
+extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 extern void br_stp_enable_port(struct net_bridge_port *p);
 extern void br_stp_disable_port(struct net_bridge_port *p);
 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);