ipv4: Unmask upper DSCP bits in RTM_GETROUTE output route lookup

Unmask the upper DSCP bits when looking up an output route via the
RTM_GETROUTE netlink message so that in the future the lookup could be
performed according to the full DSCP value.

No functional changes intended since the upper DSCP bits are masked when
comparing against the TOS selectors in FIB rules and routes.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index f6972b24664a00a8f5bedd83d3cd35064c794e86..e4b45aa184701d9343c2fa5923c6c3c980de56b6 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -3261,7 +3261,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 
        fl4.daddr = dst;
        fl4.saddr = src;
-       fl4.flowi4_tos = rtm->rtm_tos & IPTOS_RT_MASK;
+       fl4.flowi4_tos = rtm->rtm_tos & INET_DSCP_MASK;
        fl4.flowi4_oif = tb[RTA_OIF] ? nla_get_u32(tb[RTA_OIF]) : 0;
        fl4.flowi4_mark = mark;
        fl4.flowi4_uid = uid;