From: Mark Gray mark.d.gray@redhat.com
commit 34beb21594519ce64a55a498c2fe7d567bc1ca20 upstream.
This patch adds transport ports information for route lookup so that IPsec can select Geneve tunnel traffic to do encryption. This is needed for OVS/OVN IPsec with encrypted Geneve tunnels.
This can be tested by configuring a host-host VPN using an IKE daemon and specifying port numbers. For example, for an Openswan-type configuration, the following parameters should be configured on both hosts and IPsec set up as-per normal:
$ cat /etc/ipsec.conf
conn in ... left=$IP1 right=$IP2 ... leftprotoport=udp/6081 rightprotoport=udp ... conn out ... left=$IP1 right=$IP2 ... leftprotoport=udp rightprotoport=udp/6081 ...
The tunnel can then be setup using "ip" on both hosts (but changing the relevant IP addresses):
$ ip link add tun type geneve id 1000 remote $IP2 $ ip addr add 192.168.0.1/24 dev tun $ ip link set tun up
This can then be tested by pinging from $IP1:
$ ping 192.168.0.2
Without this patch the traffic is unencrypted on the wire.
Fixes: 2d07dc79fe04 ("geneve: add initial netdev driver for GENEVE tunnels") Signed-off-by: Qiuyu Xiao qiuyu.xiao.qyx@gmail.com Signed-off-by: Mark Gray mark.d.gray@redhat.com Reviewed-by: Greg Rose gvrose8192@gmail.com Signed-off-by: David S. Miller davem@davemloft.net [bwh: Backported to 4.9: - Use geneve->dst_port instead of geneve->cfg.info.key.tp_dst - Adjust context] Signed-off-by: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/geneve.c | 36 ++++++++++++++++++++++++++---------- 1 file changed, 26 insertions(+), 10 deletions(-)
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 35d8c636de123..d89995f4bd433 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -732,7 +732,8 @@ static int geneve6_build_skb(struct dst_entry *dst, struct sk_buff *skb, static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, struct net_device *dev, struct flowi4 *fl4, - struct ip_tunnel_info *info) + struct ip_tunnel_info *info, + __be16 dport, __be16 sport) { bool use_cache = ip_tunnel_dst_cache_usable(skb, info); struct geneve_dev *geneve = netdev_priv(dev); @@ -746,6 +747,8 @@ static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, memset(fl4, 0, sizeof(*fl4)); fl4->flowi4_mark = skb->mark; fl4->flowi4_proto = IPPROTO_UDP; + fl4->fl4_dport = dport; + fl4->fl4_sport = sport;
if (info) { fl4->daddr = info->key.u.ipv4.dst; @@ -791,7 +794,8 @@ static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, struct net_device *dev, struct flowi6 *fl6, - struct ip_tunnel_info *info) + struct ip_tunnel_info *info, + __be16 dport, __be16 sport) { bool use_cache = ip_tunnel_dst_cache_usable(skb, info); struct geneve_dev *geneve = netdev_priv(dev); @@ -807,6 +811,8 @@ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, memset(fl6, 0, sizeof(*fl6)); fl6->flowi6_mark = skb->mark; fl6->flowi6_proto = IPPROTO_UDP; + fl6->fl6_dport = dport; + fl6->fl6_sport = sport;
if (info) { fl6->daddr = info->key.u.ipv6.dst; @@ -894,13 +900,14 @@ static netdev_tx_t geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, goto tx_error; }
- rt = geneve_get_v4_rt(skb, dev, &fl4, info); + sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); + rt = geneve_get_v4_rt(skb, dev, &fl4, info, + geneve->dst_port, sport); if (IS_ERR(rt)) { err = PTR_ERR(rt); goto tx_error; }
- sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); skb_reset_mac_header(skb);
if (info) { @@ -983,13 +990,14 @@ static netdev_tx_t geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, } }
- dst = geneve_get_v6_dst(skb, dev, &fl6, info); + sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); + dst = geneve_get_v6_dst(skb, dev, &fl6, info, + geneve->dst_port, sport); if (IS_ERR(dst)) { err = PTR_ERR(dst); goto tx_error; }
- sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); skb_reset_mac_header(skb);
if (info) { @@ -1114,9 +1122,14 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) struct dst_entry *dst; struct flowi6 fl6; #endif + __be16 sport;
if (ip_tunnel_info_af(info) == AF_INET) { - rt = geneve_get_v4_rt(skb, dev, &fl4, info); + sport = udp_flow_src_port(geneve->net, skb, + 1, USHRT_MAX, true); + + rt = geneve_get_v4_rt(skb, dev, &fl4, info, + geneve->dst_port, sport); if (IS_ERR(rt)) return PTR_ERR(rt);
@@ -1124,7 +1137,11 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) info->key.u.ipv4.src = fl4.saddr; #if IS_ENABLED(CONFIG_IPV6) } else if (ip_tunnel_info_af(info) == AF_INET6) { - dst = geneve_get_v6_dst(skb, dev, &fl6, info); + sport = udp_flow_src_port(geneve->net, skb, + 1, USHRT_MAX, true); + + dst = geneve_get_v6_dst(skb, dev, &fl6, info, + geneve->dst_port, sport); if (IS_ERR(dst)) return PTR_ERR(dst);
@@ -1135,8 +1152,7 @@ static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) return -EINVAL; }
- info->key.tp_src = udp_flow_src_port(geneve->net, skb, - 1, USHRT_MAX, true); + info->key.tp_src = sport; info->key.tp_dst = geneve->dst_port; return 0; }