net: flow_offload: add FLOW_ACTION_PPPOE_PUSH

Add an action to represent the PPPoE hardware offload support that
includes the session ID.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/flow_offload.h

@@ -147,6 +147,7 @@ enum flow_action_id {
 	FLOW_ACTION_MPLS_POP,
 	FLOW_ACTION_MPLS_MANGLE,
 	FLOW_ACTION_GATE,
+	FLOW_ACTION_PPPOE_PUSH,
 	NUM_FLOW_ACTIONS,
 };
 
@@ -274,6 +275,9 @@ struct flow_action_entry {
 			u32		num_entries;
 			struct action_gate_entry *entries;
 		} gate;
+		struct {				/* FLOW_ACTION_PPPOE_PUSH */
+			u16		sid;
+		} pppoe;
 	};
 	struct flow_action_cookie *cookie; /* user defined action cookie */
 };