From: Quentin Armitage <quentin@armitage.org.uk>
Date: Sun, 27 Mar 2016 16:06:11 +0000 (+0100)
Subject: Fix returned tc and hoplimit values for route with IPv6 encapsulation
X-Git-Tag: Ubuntu-5.10.0-12.13~12893^2~34
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=995096a0a438396a570104e9c240a2a26623a5a1;p=mirror_ubuntu-hirsute-kernel.git

Fix returned tc and hoplimit values for route with IPv6 encapsulation

For a route with IPv6 encapsulation, the traffic class and hop limit
values are interchanged when returned to userspace by the kernel.
For example, see below.

># ip route add 192.168.0.1 dev eth0.2 encap ip6 dst 0x50 tc 0x50 hoplimit 100 table 1000
># ip route show table 1000
192.168.0.1  encap ip6 id 0 src :: dst fe83::1 hoplimit 80 tc 100 dev eth0.2  scope link

Signed-off-by: Quentin Armitage <quentin@armitage.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 02dd990af542..6165f30c4d72 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -372,8 +372,8 @@ static int ip6_tun_fill_encap_info(struct sk_buff *skb,
 	if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id) ||
 	    nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) ||
 	    nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) ||
-	    nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.tos) ||
-	    nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.ttl) ||
+	    nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) ||
+	    nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) ||
 	    nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags))
 		return -ENOMEM;