netdev - [PATCH net-next 1/8] net: fib_rules: Add port mask attributes

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Message-ID: <20250217134109.311176-2-idosch@nvidia.com>
Date: Mon, 17 Feb 2025 15:41:02 +0200
From: Ido Schimmel <idosch@...dia.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<edumazet@...gle.com>, <horms@...nel.org>, <donald.hunter@...il.com>,
	<dsahern@...nel.org>, <petrm@...dia.com>, <gnault@...hat.com>, Ido Schimmel
	<idosch@...dia.com>
Subject: [PATCH net-next 1/8] net: fib_rules: Add port mask attributes

Add attributes that allow matching on source and destination ports with
a mask. Matching on the source port with a mask is needed in deployments
where users encode path information into certain bits of the UDP source
port.

Temporarily set the type of the attributes to 'NLA_REJECT' while support
is being added.

Reviewed-by: Petr Machata <petrm@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 include/uapi/linux/fib_rules.h | 2 ++
 net/core/fib_rules.c           | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
index 00e9890ca3c0..95ec01b15c65 100644
--- a/include/uapi/linux/fib_rules.h
+++ b/include/uapi/linux/fib_rules.h
@@ -70,6 +70,8 @@ enum {
 	FRA_DSCP,	/* dscp */
 	FRA_FLOWLABEL,	/* flowlabel */
 	FRA_FLOWLABEL_MASK,	/* flowlabel mask */
+	FRA_SPORT_MASK,	/* sport mask */
+	FRA_DPORT_MASK,	/* dport mask */
 	__FRA_MAX
 };
 
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 424b4cd4e9e5..f5b1900770ec 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -784,6 +784,8 @@ static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = {
 	[FRA_DSCP]	= NLA_POLICY_MAX(NLA_U8, INET_DSCP_MASK >> 2),
 	[FRA_FLOWLABEL] = { .type = NLA_BE32 },
 	[FRA_FLOWLABEL_MASK] = { .type = NLA_BE32 },
+	[FRA_SPORT_MASK] = { .type = NLA_REJECT },
+	[FRA_DPORT_MASK] = { .type = NLA_REJECT },
 };
 
 int fib_newrule(struct net *net, struct sk_buff *skb, struct nlmsghdr *nlh,
-- 
2.48.1