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[PATCHv2,net,2/2] vxlan: fix getting tos value from DSCP field

Message ID 20200804014312.549760-3-liuhangbin@gmail.com
State New
Headers show
Series Add IP_DSCP_MASK and fix vxlan tos value before xmit | expand

Commit Message

Hangbin Liu Aug. 4, 2020, 1:43 a.m. UTC 
In commit 71130f29979c ("vxlan: fix tos value before xmit") we strict
the vxlan tos value before xmit. But as IP tos field has been obsoleted
by RFC2474, and updated by RFC3168 later. We should use new DSCP field,
or we will lost the first 3 bits value when xmit.

Fixes: 71130f29979c ("vxlan: fix tos value before xmit")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 drivers/net/vxlan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index a7c3939264b0..79488df4bc70 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2722,7 +2722,7 @@  static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 		ndst = &rt->dst;
 		skb_tunnel_check_pmtu(skb, ndst, VXLAN_HEADROOM);
 
-		tos = ip_tunnel_ecn_encap(RT_TOS(tos), old_iph, skb);
+		tos = ip_tunnel_ecn_encap(RT_DSCP(tos), old_iph, skb);
 		ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
 		err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
 				      vni, md, flags, udp_sum);
@@ -2762,7 +2762,7 @@  static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 
 		skb_tunnel_check_pmtu(skb, ndst, VXLAN6_HEADROOM);
 
-		tos = ip_tunnel_ecn_encap(RT_TOS(tos), old_iph, skb);
+		tos = ip_tunnel_ecn_encap(RT_DSCP(tos), old_iph, skb);
 		ttl = ttl ? : ip6_dst_hoplimit(ndst);
 		skb_scrub_packet(skb, xnet);
 		err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),