bridge: add notification over netlink when STP changes state

When STP changes state of interface need to send a new link
message to reflect that change.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_netlink.c

@@ -188,6 +188,8 @@ static int br_rtm_setlink(struct sk_buff *skb,  struct nlmsghdr *nlh, void *arg)
 
 	p->state = new_state;
 	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
 	return 0;
 }
 

net/bridge/br_stp.c

@@ -363,6 +363,8 @@ static void br_make_blocking(struct net_bridge_port *p)
 
 		p->state = BR_STATE_BLOCKING;
 		br_log_state(p);
+		br_ifinfo_notify(RTM_NEWLINK, p);
+
 		del_timer(&p->forward_delay_timer);
 	}
 }
@@ -386,8 +388,8 @@ static void br_make_forwarding(struct net_bridge_port *p)
 		p->state = BR_STATE_LEARNING;
 
 	br_multicast_enable_port(p);
-
 	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
 
 	if (br->forward_delay != 0)
 		mod_timer(&p->forward_delay_timer, jiffies + br->forward_delay);

net/bridge/br_stp_if.c

@@ -88,6 +88,7 @@ void br_stp_enable_port(struct net_bridge_port *p)
 	br_init_port(p);
 	br_port_state_selection(p->br);
 	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
 }
 
 /* called under bridge lock */
@@ -104,6 +105,8 @@ void br_stp_disable_port(struct net_bridge_port *p)
 	p->topology_change_ack = 0;
 	p->config_pending = 0;
 
+	br_ifinfo_notify(RTM_NEWLINK, p);
+
 	del_timer(&p->message_age_timer);
 	del_timer(&p->forward_delay_timer);
 	del_timer(&p->hold_timer);

net/bridge/br_stp_timer.c

@@ -97,6 +97,7 @@ static void br_forward_delay_timer_expired(unsigned long arg)
 		netif_carrier_on(br->dev);
 	}
 	br_log_state(p);
+	br_ifinfo_notify(RTM_NEWLINK, p);
 	spin_unlock(&br->lock);
 }