From: Mark Gray mark.d.gray@redhat.com
[ Upstream commit 34beb21594519ce64a55a498c2fe7d567bc1ca20 ]
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/geneve.c | 37 +++++++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 10 deletions(-)
--- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -773,7 +773,8 @@ static struct rtable *geneve_get_v4_rt(s struct net_device *dev, struct geneve_sock *gs4, struct flowi4 *fl4, - const struct ip_tunnel_info *info) + const 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); @@ -789,6 +790,8 @@ static struct rtable *geneve_get_v4_rt(s fl4->flowi4_proto = IPPROTO_UDP; fl4->daddr = info->key.u.ipv4.dst; fl4->saddr = info->key.u.ipv4.src; + fl4->fl4_dport = dport; + fl4->fl4_sport = sport;
tos = info->key.tos; if ((tos == 1) && !geneve->collect_md) { @@ -823,7 +826,8 @@ static struct dst_entry *geneve_get_v6_d struct net_device *dev, struct geneve_sock *gs6, struct flowi6 *fl6, - const struct ip_tunnel_info *info) + const 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); @@ -839,6 +843,9 @@ static struct dst_entry *geneve_get_v6_d fl6->flowi6_proto = IPPROTO_UDP; fl6->daddr = info->key.u.ipv6.dst; fl6->saddr = info->key.u.ipv6.src; + fl6->fl6_dport = dport; + fl6->fl6_sport = sport; + prio = info->key.tos; if ((prio == 1) && !geneve->collect_md) { prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); @@ -885,14 +892,15 @@ static int geneve_xmit_skb(struct sk_buf __be16 sport; int err;
- rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); + sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); + rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info, + geneve->info.key.tp_dst, sport); if (IS_ERR(rt)) return PTR_ERR(rt);
skb_tunnel_check_pmtu(skb, &rt->dst, GENEVE_IPV4_HLEN + info->options_len);
- sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); if (geneve->collect_md) { tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); ttl = key->ttl; @@ -947,13 +955,14 @@ static int geneve6_xmit_skb(struct sk_bu __be16 sport; int err;
- dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); + sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); + dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info, + geneve->info.key.tp_dst, sport); if (IS_ERR(dst)) return PTR_ERR(dst);
skb_tunnel_check_pmtu(skb, dst, GENEVE_IPV6_HLEN + info->options_len);
- sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); if (geneve->collect_md) { prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); ttl = key->ttl; @@ -1034,13 +1043,18 @@ static int geneve_fill_metadata_dst(stru { struct ip_tunnel_info *info = skb_tunnel_info(skb); struct geneve_dev *geneve = netdev_priv(dev); + __be16 sport;
if (ip_tunnel_info_af(info) == AF_INET) { struct rtable *rt; struct flowi4 fl4; + struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); + sport = udp_flow_src_port(geneve->net, skb, + 1, USHRT_MAX, true);
- rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); + rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info, + geneve->info.key.tp_dst, sport); if (IS_ERR(rt)) return PTR_ERR(rt);
@@ -1050,9 +1064,13 @@ static int geneve_fill_metadata_dst(stru } else if (ip_tunnel_info_af(info) == AF_INET6) { struct dst_entry *dst; struct flowi6 fl6; + struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); + sport = udp_flow_src_port(geneve->net, skb, + 1, USHRT_MAX, true);
- dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); + dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info, + geneve->info.key.tp_dst, sport); if (IS_ERR(dst)) return PTR_ERR(dst);
@@ -1063,8 +1081,7 @@ static int geneve_fill_metadata_dst(stru 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->info.key.tp_dst; return 0; }