[PATCH net-next 1/6] net: fib_rules: Add DSCP mask attribute

[Ido Schimmel <idosch@nvidia.com>]

Add an attribute that allows matching on DSCP with a mask. Matching on
DSCP with a mask is needed in deployments where users encode path
information into certain bits of the DSCP field.

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

Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 include/uapi/linux/fib_rules.h | 1 +
 net/core/fib_rules.c           | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
index 95ec01b15c65..2df6e4035d50 100644
--- a/include/uapi/linux/fib_rules.h
+++ b/include/uapi/linux/fib_rules.h
@@ -72,6 +72,7 @@ enum {
 	FRA_FLOWLABEL_MASK,	/* flowlabel mask */
 	FRA_SPORT_MASK,	/* sport mask */
 	FRA_DPORT_MASK,	/* dport mask */
+	FRA_DSCP_MASK,	/* dscp mask */
 	__FRA_MAX
 };
 
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 5ddd34cbe7f6..00e6fe79ecba 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -845,6 +845,7 @@ static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = {
 	[FRA_FLOWLABEL_MASK] = { .type = NLA_BE32 },
 	[FRA_SPORT_MASK] = { .type = NLA_U16 },
 	[FRA_DPORT_MASK] = { .type = NLA_U16 },
+	[FRA_DSCP_MASK] = { .type = NLA_REJECT },
 };
 
 int fib_newrule(struct net *net, struct sk_buff *skb, struct nlmsghdr *nlh,
-- 
2.48.1