net: openvswitch: add meter drop reason

By using an independent drop reason it makes it easy to distinguish
between QoS-triggered or flow-triggered drop.
Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/openvswitch/actions.c

@@ -1454,7 +1454,7 @@ static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
 
 		case OVS_ACTION_ATTR_METER:
 			if (ovs_meter_execute(dp, skb, key, nla_get_u32(a))) {
-				consume_skb(skb);
+				ovs_kfree_skb_reason(skb, OVS_DROP_METER);
 				return 0;
 			}
 			break;

net/openvswitch/drop.h

@@ -13,6 +13,7 @@
 	R(OVS_DROP_ACTION_ERROR)		\
 	R(OVS_DROP_EXPLICIT)			\
 	R(OVS_DROP_EXPLICIT_WITH_ERROR)		\
+	R(OVS_DROP_METER)			\
 	/* deliberate comment for trailing \ */
 
 enum ovs_drop_reason {