netdev - [RFC PATCH net-next v2 4/5] flow_offload: Introduce flow_match

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Date:   Mon, 29 Aug 2022 11:44:11 +0200
From:   Wojciech Drewek <wojciech.drewek@...el.com>
To:     netdev@...r.kernel.org
Cc:     alexandr.lobakin@...el.com, jesse.brandeburg@...el.com,
        anthony.l.nguyen@...el.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        marcin.szycik@...ux.intel.com, michal.swiatkowski@...ux.intel.com,
        kurt@...utronix.de, boris.sukholitko@...adcom.com,
        vladbu@...dia.com, komachi.yoshiki@...il.com, paulb@...dia.com,
        baowen.zheng@...igine.com, louis.peens@...igine.com,
        simon.horman@...igine.com, pablo@...filter.org,
        maksym.glubokiy@...ision.eu, intel-wired-lan@...ts.osuosl.org,
        jchapman@...alix.com, gnault@...hat.com
Subject: [RFC PATCH net-next v2 4/5] flow_offload: Introduce flow_match_l2tpv3

Allow to offload L2TPv3 filters by adding flow_rule_match_l2tpv3.
Drivers can extract L2TPv3 specific fields from now on.

Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
 include/net/flow_offload.h | 6 ++++++
 net/core/flow_offload.c    | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 2a9a9e42e7fd..e343f9f8363e 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -80,6 +80,10 @@ struct flow_match_pppoe {
 	struct flow_dissector_key_pppoe *key, *mask;
 };
 
+struct flow_match_l2tpv3 {
+	struct flow_dissector_key_l2tpv3 *key, *mask;
+};
+
 struct flow_rule;
 
 void flow_rule_match_meta(const struct flow_rule *rule,
@@ -128,6 +132,8 @@ 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);
+void flow_rule_match_l2tpv3(const struct flow_rule *rule,
+			    struct flow_match_l2tpv3 *out);
 
 enum flow_action_id {
 	FLOW_ACTION_ACCEPT		= 0,
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index 8cfb63528d18..abe423fd5736 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -237,6 +237,13 @@ void flow_rule_match_pppoe(const struct flow_rule *rule,
 }
 EXPORT_SYMBOL(flow_rule_match_pppoe);
 
+void flow_rule_match_l2tpv3(const struct flow_rule *rule,
+			    struct flow_match_l2tpv3 *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_L2TPV3, out);
+}
+EXPORT_SYMBOL(flow_rule_match_l2tpv3);
+
 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
 					  void *cb_ident, void *cb_priv,
 					  void (*release)(void *cb_priv))
-- 
2.31.1