netdev - [PATCH net-next 1/9] net: fib_rules: Add flow label selector attributes

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Message-ID: <20241216171201.274644-2-idosch@nvidia.com>
Date: Mon, 16 Dec 2024 19:11:53 +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>, <dsahern@...nel.org>, <donald.hunter@...il.com>,
	<horms@...nel.org>, <gnault@...hat.com>, <rostedt@...dmis.org>,
	<mhiramat@...nel.org>, <mathieu.desnoyers@...icios.com>, <petrm@...dia.com>,
	Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 1/9] net: fib_rules: Add flow label selector attributes

Add new FIB rule attributes which will allow user space to match on the
IPv6 flow label with a mask. Temporarily set the type of the attributes
to 'NLA_REJECT' while support is being added in the IPv6 code.

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 a6924dd3aff1..00e9890ca3c0 100644
--- a/include/uapi/linux/fib_rules.h
+++ b/include/uapi/linux/fib_rules.h
@@ -68,6 +68,8 @@ enum {
 	FRA_SPORT_RANGE, /* sport */
 	FRA_DPORT_RANGE, /* dport */
 	FRA_DSCP,	/* dscp */
+	FRA_FLOWLABEL,	/* flowlabel */
+	FRA_FLOWLABEL_MASK,	/* flowlabel mask */
 	__FRA_MAX
 };
 
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 34185d138c95..153b14aade42 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -770,6 +770,8 @@ static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = {
 	[FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) },
 	[FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) },
 	[FRA_DSCP]	= NLA_POLICY_MAX(NLA_U8, INET_DSCP_MASK >> 2),
+	[FRA_FLOWLABEL] = { .type = NLA_REJECT },
+	[FRA_FLOWLABEL_MASK] = { .type = NLA_REJECT },
 };
 
 int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
-- 
2.47.1