From: Jiri Benc <jbenc@redhat.com>
Date: Thu, 20 Aug 2015 11:56:23 +0000 (+0200)
Subject: ip_tunnels: add IPv6 addresses to ip_tunnel_key
X-Git-Tag: omap-for-v4.3/fixes-rc1~110^2~118^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1ea5d672aaff08da337dee735dbb548e3415585;p=pandora-kernel.git

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: Jiri Benc <jbenc@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index ad51dac88d19..30a7abcf2c09 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -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;
 	}
 
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index cc3b39e9010b..6a51371dad00 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -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;
diff --git a/net/core/filter.c b/net/core/filter.c
index 83f08cefeab7..379568562ffb 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -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;
 }
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