flow_offload: Introduce flow_match_pppoe

Allow to offload PPPoE filters by adding flow_rule_match_pppoe.
Drivers can extract PPPoE specific fields from now on.

Signed-off-by: Wojciech Drewek <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: WojDrew

include/net/flow_offload.h

@@ -76,6 +76,10 @@ struct flow_match_ct {
 	struct flow_dissector_key_ct *key, *mask;
 };
 
+struct flow_match_pppoe {
+	struct flow_dissector_key_pppoe *key, *mask;
+};
+
 struct flow_rule;
 
 void flow_rule_match_meta(const struct flow_rule *rule,
@@ -122,6 +126,8 @@ void flow_rule_match_enc_opts(const struct flow_rule *rule,
 			      struct flow_match_enc_opts *out);
 void flow_rule_match_ct(const struct flow_rule *rule,
 			struct flow_match_ct *out);
+void flow_rule_match_pppoe(const struct flow_rule *rule,
+			   struct flow_match_pppoe *out);
 
 enum flow_action_id {
 	FLOW_ACTION_ACCEPT		= 0,

net/core/flow_offload.c

@@ -230,6 +230,13 @@ void flow_rule_match_ct(const struct flow_rule *rule,
 }
 EXPORT_SYMBOL(flow_rule_match_ct);
 
+void flow_rule_match_pppoe(const struct flow_rule *rule,
+			   struct flow_match_pppoe *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PPPOE, out);
+}
+EXPORT_SYMBOL(flow_rule_match_pppoe);
+
 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
 					  void *cb_ident, void *cb_priv,
 					  void (*release)(void *cb_priv))