Commit b1251a6f authored by Ido Schimmel's avatar Ido Schimmel Committed by Jakub Kicinski
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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: default avatarIdo Schimmel <idosch@nvidia.com>
Reviewed-by: default avatarGuillaume Nault <gnault@redhat.com>
Acked-by: default avatarFlorian Westphal <fw@strlen.de>
Reviewed-by: default avatarDavid Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20240821125251.1571445-10-idosch@nvidia.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent df9131c7

net/ipv4/route.c

+1 −1
Original line number Diff line number Diff line
@@ -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);