From b1251a6f1a9b475725a097e75196ee105076cbd1 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Wed, 21 Aug 2024 15:52:48 +0300 Subject: [PATCH] ipv4: Unmask upper DSCP bits in RTM_GETROUTE input route lookup Unmask the upper DSCP bits when looking up an input 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 Reviewed-by: Guillaume Nault Acked-by: Florian Westphal Reviewed-by: David Ahern Link: https://patch.msgid.link/20240821125251.1571445-10-idosch@nvidia.com Signed-off-by: Jakub Kicinski --- net/ipv4/route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 73bb61162445..524b70ab77a0 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -3286,7 +3286,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, skb->dev = dev; skb->mark = mark; err = ip_route_input_rcu(skb, dst, src, - rtm->rtm_tos & IPTOS_RT_MASK, dev, + rtm->rtm_tos & INET_DSCP_MASK, dev, &res); rt = skb_rtable(skb); -- 2.50.1