From a725e514dbb444f2a39c2bc5de72eb5efbeb7d5e Mon Sep 17 00:00:00 2001 From: Jiri Benc Date: Thu, 20 Aug 2015 13:56:30 +0200 Subject: [PATCH] vxlan: metadata based tunneling for IPv6 Support metadata based (formerly flow based) tunneling also for IPv6. This complements commit ee122c79d422 ("vxlan: Flow based tunneling"). Signed-off-by: Jiri Benc Acked-by: Thomas Graf Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 69 ++++++++++++++++++++++++++------------------- 1 file changed, 40 insertions(+), 29 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 2c1abf95c17d..54615bb9d916 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -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; - info->key.u.ipv4.src = iph->saddr; - info->key.u.ipv4.dst = iph->daddr; - info->key.tos = iph->tos; - info->key.ttl = iph->ttl; + 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.sin.sin_addr.s_addr = info->key.u.ipv4.dst; + 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; } @@ -1951,23 +1964,24 @@ 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 (info) { + if (info->key.tun_flags & TUNNEL_CSUM) + flags |= VXLAN_F_UDP_CSUM; + else + flags &= ~VXLAN_F_UDP_CSUM; + + ttl = info->key.ttl; + tos = info->key.tos; + + if (info->options_len) + md = ip_tunnel_info_opts(info, sizeof(*md)); + } else { + md->gbp = skb->mark; + } + 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 - flags &= ~VXLAN_F_UDP_CSUM; - - ttl = info->key.ttl; - tos = info->key.tos; - - if (info->options_len) - md = ip_tunnel_info_opts(info, sizeof(*md)); - } else { - md->gbp = skb->mark; - } + 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; @@ -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); -- 2.20.1