geneve: ICMP error lookup handler (a0796644) · Commits · 戴 / test

drivers/net/geneve.c

+52 −0

Original line number	Diff line number	Diff line
		@@ -387,6 +387,57 @@ drop:
		return 0;
		}

		/* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */
		static int geneve_udp_encap_err_lookup(struct sock sk, struct sk_buff skb)
		{
		struct genevehdr *geneveh;
		struct geneve_sock *gs;
		u8 zero_vni[3] = { 0 };
		u8 *vni = zero_vni;

		if (skb->len < GENEVE_BASE_HLEN)
		return -EINVAL;

		geneveh = geneve_hdr(skb);
		if (geneveh->ver != GENEVE_VER)
		return -EINVAL;

		if (geneveh->proto_type != htons(ETH_P_TEB))
		return -EINVAL;

		gs = rcu_dereference_sk_user_data(sk);
		if (!gs)
		return -ENOENT;

		if (geneve_get_sk_family(gs) == AF_INET) {
		struct iphdr *iph = ip_hdr(skb);
		__be32 addr4 = 0;

		if (!gs->collect_md) {
		vni = geneve_hdr(skb)->vni;
		addr4 = iph->daddr;
		}

		return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT;
		}

		#if IS_ENABLED(CONFIG_IPV6)
		if (geneve_get_sk_family(gs) == AF_INET6) {
		struct ipv6hdr *ip6h = ipv6_hdr(skb);
		struct in6_addr addr6 = { 0 };

		if (!gs->collect_md) {
		vni = geneve_hdr(skb)->vni;
		addr6 = ip6h->daddr;
		}

		return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT;
		}
		#endif

		return -EPFNOSUPPORT;
		}

		static struct socket geneve_create_sock(struct net net, bool ipv6,
		__be16 port, bool ipv6_rx_csum)
		{
		@@ -544,6 +595,7 @@ static struct geneve_sock geneve_socket_create(struct net net, __be16 port,
		tunnel_cfg.gro_receive = geneve_gro_receive;
		tunnel_cfg.gro_complete = geneve_gro_complete;
		tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
		tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup;
		tunnel_cfg.encap_destroy = NULL;
		setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
		list_add(&gs->list, &gn->sock_list);

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