gre: Allow IPv6 ToS bits to be propagated to tunnel packets.

The IPv6 ToS bits should have the same meaning as in IPv4, so
allow them to be copied from the inner packet to the tunnel packet
if enabled.

diff --git a/datapath/linux-2.6/compat-2.6/ip_gre.c b/datapath/linux-2.6/compat-2.6/ip_gre.c
index 2f46e05..5882b3c 100644 (file)
--- a/datapath/linux-2.6/compat-2.6/ip_gre.c
+++ b/datapath/linux-2.6/compat-2.6/ip_gre.c
@@ -813,6 +813,8 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
                tos = 0;
                if (skb->protocol == htons(ETH_P_IP))
                        tos = old_iph->tos;
+               else if (skb->protocol == htons(ETH_P_IPV6))
+                       tos = ipv6_get_dsfield(ipv6_hdr(skb));
        }
 
        {