Commit c1ea5d67 authored by Jiri Benc's avatar Jiri Benc Committed by David S. Miller
Browse files

ip_tunnels: add IPv6 addresses to ip_tunnel_key 



Add the IPv6 addresses as an union with IPv4 ones. When using IPv4, the
newly introduced padding after the IPv4 addresses needs to be zeroed out.

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 376534a3

drivers/net/vxlan.c

+3 −3
Original line number Diff line number Diff line
@@ -1276,8 +1276,8 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 
			goto drop;



		info = &tun_dst->u.tun_info;

		info->key.ipv4_src = iph->saddr;

		info->key.ipv4_dst = iph->daddr;

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

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

		info->key.ipv4_tos = iph->tos;

		info->key.ipv4_ttl = iph->ttl;

		info->key.tp_src = udp_hdr(skb)->source;
@@ -1925,7 +1925,7 @@ 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.sin.sin_addr.s_addr = info->key.ipv4_dst;

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

		dst = &remote_ip;

	}

include/net/ip_tunnels.h

+20 −4
Original line number Diff line number Diff line
@@ -25,10 +25,24 @@ 
/* Used to memset ip_tunnel padding. */

#define IP_TUNNEL_KEY_SIZE	offsetofend(struct ip_tunnel_key, tp_dst)



/* Used to memset ipv4 address padding. */

#define IP_TUNNEL_KEY_IPV4_PAD	offsetofend(struct ip_tunnel_key, u.ipv4.dst)

#define IP_TUNNEL_KEY_IPV4_PAD_LEN				\

	(FIELD_SIZEOF(struct ip_tunnel_key, u) -		\

	 FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4))



struct ip_tunnel_key {

	__be64			tun_id;

	__be32			ipv4_src;

	__be32			ipv4_dst;

	union {

		struct {

			__be32	src;

			__be32	dst;

		} ipv4;

		struct {

			struct in6_addr src;

			struct in6_addr dst;

		} ipv6;

	} u;

	__be16			tun_flags;

	u8			ipv4_tos;

	u8			ipv4_ttl;
@@ -177,8 +191,10 @@ static inline void __ip_tunnel_info_init(struct ip_tunnel_info *tun_info, 
					 const void *opts, u8 opts_len)

{

	tun_info->key.tun_id = tun_id;

	tun_info->key.ipv4_src = saddr;

	tun_info->key.ipv4_dst = daddr;

	tun_info->key.u.ipv4.src = saddr;

	tun_info->key.u.ipv4.dst = daddr;

	memset((unsigned char *)&tun_info->key + IP_TUNNEL_KEY_IPV4_PAD,

	       0, IP_TUNNEL_KEY_IPV4_PAD_LEN);

	tun_info->key.ipv4_tos = tos;

	tun_info->key.ipv4_ttl = ttl;

	tun_info->key.tun_flags = tun_flags;

net/core/filter.c

+2 −2
Original line number Diff line number Diff line
@@ -1495,7 +1495,7 @@ static u64 bpf_skb_get_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5) 
		return -EINVAL;



	to->tunnel_id = be64_to_cpu(info->key.tun_id);

	to->remote_ipv4 = be32_to_cpu(info->key.ipv4_src);

	to->remote_ipv4 = be32_to_cpu(info->key.u.ipv4.src);



	return 0;

}
@@ -1529,7 +1529,7 @@ static u64 bpf_skb_set_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags, u64 r5) 
	info = &md->u.tun_info;

	info->mode = IP_TUNNEL_INFO_TX;

	info->key.tun_id = cpu_to_be64(from->tunnel_id);

	info->key.ipv4_dst = cpu_to_be32(from->remote_ipv4);

	info->key.u.ipv4.dst = cpu_to_be32(from->remote_ipv4);



	return 0;

}

net/ipv4/ip_gre.c

+5 −5
Original line number Diff line number Diff line
@@ -407,8 +407,8 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) 
				return PACKET_REJECT;



			info = &tun_dst->u.tun_info;

			info->key.ipv4_src = iph->saddr;

			info->key.ipv4_dst = iph->daddr;

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

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

			info->key.ipv4_tos = iph->tos;

			info->key.ipv4_ttl = iph->ttl;
@@ -527,8 +527,8 @@ static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev) 


	key = &tun_info->key;

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

	fl.daddr = key->ipv4_dst;

	fl.saddr = key->ipv4_src;

	fl.daddr = key->u.ipv4.dst;

	fl.saddr = key->u.ipv4.src;

	fl.flowi4_tos = RT_TOS(key->ipv4_tos);

	fl.flowi4_mark = skb->mark;

	fl.flowi4_proto = IPPROTO_GRE;
@@ -564,7 +564,7 @@ static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev) 


	df = key->tun_flags & TUNNEL_DONT_FRAGMENT ?  htons(IP_DF) : 0;

	err = iptunnel_xmit(skb->sk, rt, skb, fl.saddr,

			    key->ipv4_dst, IPPROTO_GRE,

			    key->u.ipv4.dst, IPPROTO_GRE,

			    key->ipv4_tos, key->ipv4_ttl, df, false);

	iptunnel_xmit_stats(err, &dev->stats, dev->tstats);

	return;

net/ipv4/ip_tunnel_core.c

+4 −4
Original line number Diff line number Diff line
@@ -227,10 +227,10 @@ static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr, 
		tun_info->key.tun_id = nla_get_u64(tb[LWTUNNEL_IP_ID]);



	if (tb[LWTUNNEL_IP_DST])

		tun_info->key.ipv4_dst = nla_get_be32(tb[LWTUNNEL_IP_DST]);

		tun_info->key.u.ipv4.dst = nla_get_be32(tb[LWTUNNEL_IP_DST]);



	if (tb[LWTUNNEL_IP_SRC])

		tun_info->key.ipv4_src = nla_get_be32(tb[LWTUNNEL_IP_SRC]);

		tun_info->key.u.ipv4.src = nla_get_be32(tb[LWTUNNEL_IP_SRC]);



	if (tb[LWTUNNEL_IP_TTL])

		tun_info->key.ipv4_ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]);
@@ -262,8 +262,8 @@ static int ip_tun_fill_encap_info(struct sk_buff *skb, 
	struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);



	if (nla_put_u64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id) ||

	    nla_put_be32(skb, LWTUNNEL_IP_DST, tun_info->key.ipv4_dst) ||

	    nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.ipv4_src) ||

	    nla_put_be32(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) ||

	    nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) ||

	    nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.ipv4_tos) ||

	    nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ipv4_ttl) ||

	    nla_put_u16(skb, LWTUNNEL_IP_SPORT, tun_info->key.tp_src) ||

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