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ipv4: udp_tunnel: Unmask upper DSCP bits in udp_tunnel_dst_lookup()

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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 <idosch@nvidia.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2024-09-05 19:51:39 +03:00 committed by David S. Miller
parent 345663e6a7
commit 2c60fc9ca2
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/udp_tunnel_core.c
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@ -6,6 +6,7 @@
#include <net/dst_metadata.h> #include <net/dst_metadata.h>
#include <net/udp.h> #include <net/udp.h>
#include <net/udp_tunnel.h> #include <net/udp_tunnel.h>
#include <net/inet_dscp.h>
int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,
struct socket **sockp) struct socket **sockp)
@ -232,7 +233,7 @@ struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb,
fl4.saddr = key->u.ipv4.src; fl4.saddr = key->u.ipv4.src;
fl4.fl4_dport = dport; fl4.fl4_dport = dport;
fl4.fl4_sport = sport; fl4.fl4_sport = sport;
fl4.flowi4_tos = RT_TOS(tos); fl4.flowi4_tos = tos & INET_DSCP_MASK;
fl4.flowi4_flags = key->flow_flags; fl4.flowi4_flags = key->flow_flags;
rt = ip_route_output_key(net, &fl4); rt = ip_route_output_key(net, &fl4);