[patch added to the 3.12 stable tree] ipvs: Maintain all DSCP and ECN bits for ipv6 tun forwarding

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From: Alex Gartrell <agartrell@xxxxxx>

This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.

===============

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@xxxxxx>
Acked-by: Julian Anastasov <ja@xxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 net/netfilter/ipvs/ip_vs_xmit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index 7f0e1cf2d7e8..1692e7534759 100644
--- 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;
-- 
2.1.0

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