[PATCH net-next 11/12] ipv4: udp_tunnel: Unmask upper DSCP bits in udp_tunnel_dst_lookup()

[Ido Schimmel]

Unmask the upper DSCP bits when calling ip_route_output_key() so that in
the future it could perform the FIB lookup according to the full DSCP
value.

Note that callers of udp_tunnel_dst_lookup() pass the entire DS field in
the 'tos' argument.

Signed-off-by: Ido Schimmel <ido...@nvidia.com>
---
 net/ipv4/udp_tunnel_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c
index e4e0fa869fa4..619a53eb672d 100644
--- a/net/ipv4/udp_tunnel_core.c
+++ b/net/ipv4/udp_tunnel_core.c
@@ -6,6 +6,7 @@
 #include <net/dst_metadata.h>
 #include <net/udp.h>
 #include <net/udp_tunnel.h>
+#include <net/inet_dscp.h>
 
 int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
                     struct socket **sockp)
@@ -232,7 +233,7 @@ struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb,
        fl4.saddr = key->u.ipv4.src;
        fl4.fl4_dport = dport;
        fl4.fl4_sport = sport;
-       fl4.flowi4_tos = RT_TOS(tos);
+       fl4.flowi4_tos = tos & INET_DSCP_MASK;
        fl4.flowi4_flags = key->flow_flags;
 
        rt = ip_route_output_key(net, &fl4);
-- 
2.46.0