bridge: netlink: export port's id and number

Add IFLA_BRPORT_(ID|NO) to allow getting port's port_id and port_no
respectively via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 678d227..e513327 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -131,6 +131,8 @@
 		+ nla_total_size(sizeof(struct ifla_bridge_id))	/* IFLA_BRPORT_BRIDGE_ID */
 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_DESIGNATED_PORT */
 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_DESIGNATED_COST */
+		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_ID */
+		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_NO */
 		+ 0;
 }
 
@@ -170,7 +172,9 @@
 	    nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
 		    &p->designated_bridge) ||
 	    nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
-	    nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost))
+	    nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
+	    nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
+	    nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no))
 		return -EMSGSIZE;
 
 	return 0;