linux-kernel - [PATCH net-next] net: flow_offload: add support for ARP frame matching

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Message-ID: <20221104123314.1349814-1-steen.hegelund@microchip.com>
Date:   Fri, 4 Nov 2022 13:33:14 +0100
From:   Steen Hegelund <steen.hegelund@...rochip.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
CC:     Steen Hegelund <steen.hegelund@...rochip.com>,
        Louis Peens <louis.peens@...igine.com>,
        Baowen Zheng <baowen.zheng@...igine.com>,
        "Simon Horman" <simon.horman@...igine.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Wojciech Drewek <wojciech.drewek@...el.com>,
        Maksym Glubokiy <maksym.glubokiy@...ision.eu>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <UNGLinuxDriver@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next] net: flow_offload: add support for ARP frame matching

This adds a new flow_rule_match_arp function that allows drivers
to be able to dissect APR frames.

Signed-off-by: Steen Hegelund <steen.hegelund@...rochip.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 7a60bc6d72c9..0400a0ac8a29 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -32,6 +32,10 @@ struct flow_match_vlan {
 	struct flow_dissector_key_vlan *key, *mask;
 };
 
+struct flow_match_arp {
+	struct flow_dissector_key_arp *key, *mask;
+};
+
 struct flow_match_ipv4_addrs {
 	struct flow_dissector_key_ipv4_addrs *key, *mask;
 };
@@ -98,6 +102,8 @@ void flow_rule_match_vlan(const struct flow_rule *rule,
 			  struct flow_match_vlan *out);
 void flow_rule_match_cvlan(const struct flow_rule *rule,
 			   struct flow_match_vlan *out);
+void flow_rule_match_arp(const struct flow_rule *rule,
+			 struct flow_match_arp *out);
 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
 				struct flow_match_ipv4_addrs *out);
 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index abe423fd5736..acfc1f88ea79 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -97,6 +97,13 @@ void flow_rule_match_cvlan(const struct flow_rule *rule,
 }
 EXPORT_SYMBOL(flow_rule_match_cvlan);
 
+void flow_rule_match_arp(const struct flow_rule *rule,
+			 struct flow_match_arp *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ARP, out);
+}
+EXPORT_SYMBOL(flow_rule_match_arp);
+
 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
 				struct flow_match_ipv4_addrs *out)
 {
-- 
2.38.1