flow_offload: support CVLAN match

Plumb it through from the flow_dissector.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/flow_offload.c

@@ -54,6 +54,13 @@ void flow_rule_match_vlan(const struct flow_rule *rule,
 }
 EXPORT_SYMBOL(flow_rule_match_vlan);
 
+void flow_rule_match_cvlan(const struct flow_rule *rule,
+			   struct flow_match_vlan *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CVLAN, out);
+}
+EXPORT_SYMBOL(flow_rule_match_cvlan);
+
 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
 				struct flow_match_ipv4_addrs *out)
 {