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Commit a725e514 authored by Jiri Benc's avatar Jiri Benc Committed by David S. Miller
Browse files

vxlan: metadata based tunneling for IPv6 



Support metadata based (formerly flow based) tunneling also for IPv6.
This complements commit ee122c79 ("vxlan: Flow based tunneling").

Signed-off-by: default avatarJiri Benc <jbenc@redhat.com>
Acked-by: default avatarThomas Graf <tgraf@suug.ch>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6f264e47

drivers/net/vxlan.c

+40 −29
Original line number Diff line number Diff line
@@ -1269,17 +1269,27 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 
	}



	if (vxlan_collect_metadata(vs)) {

		const struct iphdr *iph = ip_hdr(skb);



		tun_dst = metadata_dst_alloc(sizeof(*md), GFP_ATOMIC);

		if (!tun_dst)

			goto drop;



		info = &tun_dst->u.tun_info;

		if (vxlan_get_sk_family(vs) == AF_INET) {

			const struct iphdr *iph = ip_hdr(skb);



			info->key.u.ipv4.src = iph->saddr;

			info->key.u.ipv4.dst = iph->daddr;

			info->key.tos = iph->tos;

			info->key.ttl = iph->ttl;

		} else {

			const struct ipv6hdr *ip6h = ipv6_hdr(skb);



			info->key.u.ipv6.src = ip6h->saddr;

			info->key.u.ipv6.dst = ip6h->daddr;

			info->key.tos = ipv6_get_dsfield(ip6h);

			info->key.ttl = ip6h->hop_limit;

		}



		info->key.tp_src = udp_hdr(skb)->source;

		info->key.tp_dst = udp_hdr(skb)->dest;
@@ -1894,6 +1904,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
	struct ip_tunnel_info *info;

	struct vxlan_dev *vxlan = netdev_priv(dev);

	struct sock *sk = vxlan->vn_sock->sock->sk;

	unsigned short family = vxlan_get_sk_family(vxlan->vn_sock);

	struct rtable *rt = NULL;

	const struct iphdr *old_iph;

	struct flowi4 fl4;
@@ -1908,7 +1919,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
	int err;

	u32 flags = vxlan->flags;



	/* FIXME: Support IPv6 */

	info = skb_tunnel_info(skb);



	if (rdst) {
@@ -1924,8 +1934,11 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 


		dst_port = info->key.tp_dst ? : vxlan->cfg.dst_port;

		vni = be64_to_cpu(info->key.tun_id);

		remote_ip.sin.sin_family = AF_INET;

		remote_ip.sa.sa_family = family;

		if (family == AF_INET)

			remote_ip.sin.sin_addr.s_addr = info->key.u.ipv4.dst;

		else

			remote_ip.sin6.sin6_addr = info->key.u.ipv6.dst;

		dst = &remote_ip;

	}
@@ -1951,10 +1964,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
	src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,

				     vxlan->cfg.port_max, true);



	if (dst->sa.sa_family == AF_INET) {

	if (info) {

			if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)

				df = htons(IP_DF);

		if (info->key.tun_flags & TUNNEL_CSUM)

			flags |= VXLAN_F_UDP_CSUM;

		else
@@ -1969,6 +1979,10 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
		md->gbp = skb->mark;

	}



	if (dst->sa.sa_family == AF_INET) {

		if (info && (info->key.tun_flags & TUNNEL_DONT_FRAGMENT))

			df = htons(IP_DF);



		memset(&fl4, 0, sizeof(fl4));

		fl4.flowi4_oif = rdst ? rdst->remote_ifindex : 0;

		fl4.flowi4_tos = RT_TOS(tos);
@@ -2066,12 +2080,10 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
		}



		ttl = ttl ? : ip6_dst_hoplimit(ndst);

		md->gbp = skb->mark;



		err = vxlan6_xmit_skb(ndst, sk, skb, dev, &fl6.saddr, &fl6.daddr,

				      0, ttl, src_port, dst_port, htonl(vni << 8), md,

				      !net_eq(vxlan->net, dev_net(vxlan->dev)),

				      vxlan->flags);

				      flags);

#endif

	}
@@ -2104,7 +2116,6 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) 
	struct vxlan_rdst *rdst, *fdst = NULL;

	struct vxlan_fdb *f;



	/* FIXME: Support IPv6 */

	info = skb_tunnel_info(skb);



	skb_reset_mac_header(skb);