netdev - [PATCH iproute2-next 4/6] libnetlink: add bridge vlan dump request helper

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Message-Id: <20210418120137.2605522-5-razor@blackwall.org>
Date:   Sun, 18 Apr 2021 15:01:35 +0300
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     netdev@...r.kernel.org
Cc:     roopa@...dia.com, dsahern@...il.com,
        Nikolay Aleksandrov <nikolay@...dia.com>
Subject: [PATCH iproute2-next 4/6] libnetlink: add bridge vlan dump request helper

From: Nikolay Aleksandrov <nikolay@...dia.com>

Add rtnl bridge vlan dump request helper which will be used to retrieve
bridge vlan information and options.

Signed-off-by: Nikolay Aleksandrov <nikolay@...dia.com>
---
 include/libnetlink.h |  2 ++
 lib/libnetlink.c     | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/libnetlink.h b/include/libnetlink.h
index e8ed5d7fb495..da96c69b9ede 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -69,6 +69,8 @@ int rtnl_neightbldump_req(struct rtnl_handle *rth, int family)
 	__attribute__((warn_unused_result));
 int rtnl_mdbdump_req(struct rtnl_handle *rth, int family)
 	__attribute__((warn_unused_result));
+int rtnl_brvlandump_req(struct rtnl_handle *rth, int family, __u32 dump_flags)
+	__attribute__((warn_unused_result));
 int rtnl_netconfdump_req(struct rtnl_handle *rth, int family)
 	__attribute__((warn_unused_result));
 
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 6885087b34f9..2f2cc1fe0a61 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -450,6 +450,25 @@ int rtnl_mdbdump_req(struct rtnl_handle *rth, int family)
 	return send(rth->fd, &req, sizeof(req), 0);
 }
 
+int rtnl_brvlandump_req(struct rtnl_handle *rth, int family, __u32 dump_flags)
+{
+	struct {
+		struct nlmsghdr nlh;
+		struct br_vlan_msg bvm;
+		char buf[256];
+	} req = {
+		.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_vlan_msg)),
+		.nlh.nlmsg_type = RTM_GETVLAN,
+		.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
+		.nlh.nlmsg_seq = rth->dump = ++rth->seq,
+		.bvm.family = family,
+	};
+
+	addattr32(&req.nlh, sizeof(req), BRIDGE_VLANDB_DUMP_FLAGS, dump_flags);
+
+	return send(rth->fd, &req, sizeof(req), 0);
+}
+
 int rtnl_netconfdump_req(struct rtnl_handle *rth, int family)
 {
 	struct {
-- 
2.30.2