netdev - [PATCH net-next 09/12] ipv4: Unmask upper DSCP bits in RTM

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Message-ID: <20240821125251.1571445-10-idosch@nvidia.com>
Date: Wed, 21 Aug 2024 15:52:48 +0300
From: Ido Schimmel <idosch@...dia.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<edumazet@...gle.com>, <gnault@...hat.com>, <dsahern@...nel.org>,
	<fw@...len.de>, <martin.lau@...ux.dev>, <daniel@...earbox.net>,
	<john.fastabend@...il.com>, <ast@...nel.org>, <pablo@...filter.org>,
	<kadlec@...filter.org>, <willemdebruijn.kernel@...il.com>,
	<bpf@...r.kernel.org>, <netfilter-devel@...r.kernel.org>,
	<coreteam@...filter.org>, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 09/12] 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 <idosch@...dia.com>
---
 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);
-- 
2.46.0