ipvs: Maintain all DSCP and ECN bits for ipv6 tun forwarding

commit 76f084bc10004b3050b2cff9cfac29148f1f6088 upstream.

Previously, only the four high bits of the tclass were maintained in the
ipv6 case.  This matches the behavior of ipv4, though whether or not we
should reflect ECN bits may be up for debate.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index 7f0e1cf2d7e87ea75640f9bf0115978d5d3978b5..1692e75347593c04bd8cd93aa6d0e6887437eaf2 100644 (file)
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -967,8 +967,8 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
        iph->nexthdr            =       IPPROTO_IPV6;
        iph->payload_len        =       old_iph->payload_len;
        be16_add_cpu(&iph->payload_len, sizeof(*old_iph));
-       iph->priority           =       old_iph->priority;
        memset(&iph->flow_lbl, 0, sizeof(iph->flow_lbl));
+       ipv6_change_dsfield(iph, 0, ipv6_get_dsfield(old_iph));
        iph->daddr = cp->daddr.in6;
        iph->saddr = saddr;
        iph->hop_limit          =       old_iph->hop_limit;