vxlan: fix tos value before xmit

[ Upstream commit 71130f29979c7c7956b040673e6b9d5643003176 ]

Before ip_tunnel_ecn_encap() and udp_tunnel_xmit_skb() we should filter
tos value by RT_TOS() instead of using config tos directly.

vxlan_get_route() would filter the tos to fl4.flowi4_tos but we didn't
return it back, as geneve_get_v4_rt() did. So we have to use RT_TOS()
directly in function ip_tunnel_ecn_encap().

Fixes: 206aaafcd279 ("VXLAN: Use IP Tunnels tunnel ENC encap API")
Fixes: 1400615d64cf ("vxlan: allow setting ipv6 traffic class")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 340bd98b8dbd74a77df759b84c133c02867bcc2e..987bb1db8265d339fac547dc0ec76b9abac6a33b 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2104,7 +2104,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
                else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)
                        df = htons(IP_DF);
 
-               tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
+               tos = ip_tunnel_ecn_encap(RT_TOS(tos), old_iph, skb);
                ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
                err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr),
                                      vni, md, flags, udp_sum);
@@ -2163,7 +2163,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
                if (!info)
                        udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
 
-               tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
+               tos = ip_tunnel_ecn_encap(RT_TOS(tos), old_iph, skb);
                ttl = ttl ? : ip6_dst_hoplimit(ndst);
                skb_scrub_packet(skb, xnet);
                err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),