netfilter: flowtable: add tunnel encap/decap action offload support (88bf6e41) · Commits · 戴 / test

net/netfilter/nf_flow_table_offload.c

+45 −0

Original line number	Diff line number	Diff line
		@@ -475,10 +475,52 @@ static void flow_offload_redirect(const struct flow_offload *flow,
		dev_hold(rt->dst.dev);
		}

		static void flow_offload_encap_tunnel(const struct flow_offload *flow,
		enum flow_offload_tuple_dir dir,
		struct nf_flow_rule *flow_rule)
		{
		struct flow_action_entry *entry;
		struct dst_entry *dst;

		dst = flow->tuplehash[dir].tuple.dst_cache;
		if (dst->lwtstate) {
		struct ip_tunnel_info *tun_info;

		tun_info = lwt_tun_info(dst->lwtstate);
		if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
		entry = flow_action_entry_next(flow_rule);
		entry->id = FLOW_ACTION_TUNNEL_ENCAP;
		entry->tunnel = tun_info;
		}
		}
		}

		static void flow_offload_decap_tunnel(const struct flow_offload *flow,
		enum flow_offload_tuple_dir dir,
		struct nf_flow_rule *flow_rule)
		{
		struct flow_action_entry *entry;
		struct dst_entry *dst;

		dst = flow->tuplehash[!dir].tuple.dst_cache;
		if (dst->lwtstate) {
		struct ip_tunnel_info *tun_info;

		tun_info = lwt_tun_info(dst->lwtstate);
		if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
		entry = flow_action_entry_next(flow_rule);
		entry->id = FLOW_ACTION_TUNNEL_DECAP;
		}
		}
		}

		int nf_flow_rule_route_ipv4(struct net net, const struct flow_offload flow,
		enum flow_offload_tuple_dir dir,
		struct nf_flow_rule *flow_rule)
		{
		flow_offload_decap_tunnel(flow, dir, flow_rule);
		flow_offload_encap_tunnel(flow, dir, flow_rule);

		if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 \|\|
		flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
		return -1;
		@@ -505,6 +547,9 @@ int nf_flow_rule_route_ipv6(struct net net, const struct flow_offload flow,
		enum flow_offload_tuple_dir dir,
		struct nf_flow_rule *flow_rule)
		{
		flow_offload_decap_tunnel(flow, dir, flow_rule);
		flow_offload_encap_tunnel(flow, dir, flow_rule);

		if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 \|\|
		flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
		return -1;

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