netdev - [PATCH net-next v2 4/4] net: sched: em_ipt: add support for addrtype matching

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Message-Id: <20190626155615.16639-5-nikolay@cumulusnetworks.com>
Date:   Wed, 26 Jun 2019 18:56:15 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     roopa@...ulusnetworks.com, pablo@...filter.org,
        xiyou.wangcong@...il.com, davem@...emloft.net, jiri@...nulli.us,
        jhs@...atatu.com, eyal.birger@...il.com,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: [PATCH net-next v2 4/4] net: sched: em_ipt: add support for addrtype matching

Allow em_ipt to use addrtype for matching. Restrict the use only to
revision 1 which has IPv6 support. Since it's a NFPROTO_UNSPEC xt match
we use the user-specified nfproto for matching, in case it's unspecified
both v4/v6 will be matched by the rule.

v2: no changes, was patch 5 in v1

Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
---
 net/sched/em_ipt.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/net/sched/em_ipt.c b/net/sched/em_ipt.c
index ce91f3cea0bd..b08d87bd120b 100644
--- a/net/sched/em_ipt.c
+++ b/net/sched/em_ipt.c
@@ -72,11 +72,25 @@ static int policy_validate_match_data(struct nlattr **tb, u8 mrev)
 	return 0;
 }
 
+static int addrtype_validate_match_data(struct nlattr **tb, u8 mrev)
+{
+	if (mrev != 1) {
+		pr_err("only addrtype match revision 1 supported");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static const struct em_ipt_xt_match em_ipt_xt_matches[] = {
 	{
 		.match_name = "policy",
 		.validate_match_data = policy_validate_match_data
 	},
+	{
+		.match_name = "addrtype",
+		.validate_match_data = addrtype_validate_match_data
+	},
 	{}
 };
 
-- 
2.20.1