net/sched: flower: Dump the ethertype encapsulated in vlan

Currently the encapsulated ethertype is not dumped as it's the same as
TCA_FLOWER_KEY_ETH_TYPE keyvalue. But the dumping result is inconsistent
with input, we add dumping it with TCA_FLOWER_KEY_VLAN_ETH_TYPE.
Signed-off-by: Jianbo Liu <jianbol@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/cls_flower.c

@@ -1313,6 +1313,10 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
 	if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
 		goto nla_put_failure;
 
+	if (mask->vlan.vlan_tpid &&
+	    nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, key->basic.n_proto))
+		goto nla_put_failure;
+
 	if ((key->basic.n_proto == htons(ETH_P_IP) ||
 	     key->basic.n_proto == htons(ETH_P_IPV6)) &&
 	    (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,