net: openvswitch: add action error drop reason

Add a drop reason for packets that are dropped because an action
returns a non-zero error code.
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

@@ -1488,7 +1488,7 @@ static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
 		}
 
 		if (unlikely(err)) {
-			kfree_skb(skb);
+			ovs_kfree_skb_reason(skb, OVS_DROP_ACTION_ERROR);
 			return err;
 		}
 	}

net/openvswitch/drop.h

@@ -10,6 +10,7 @@
 
 #define OVS_DROP_REASONS(R)			\
 	R(OVS_DROP_LAST_ACTION)		        \
+	R(OVS_DROP_ACTION_ERROR)		\
 	/* deliberate comment for trailing \ */
 
 enum ovs_drop_reason {