1 files changed, 663 insertions, 0 deletions

diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
new file mode 100644
index 000000000..c32820963
--- /dev/null
+++ b/net/batman-adv/netlink.c
@@ -0,0 +1,663 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2016-2018  B.A.T.M.A.N. contributors:
+ *
+ * Matthias Schiffer
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "netlink.h"
+#include "main.h"
+
+#include <linux/atomic.h>
+#include <linux/byteorder/generic.h>
+#include <linux/cache.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/genetlink.h>
+#include <linux/gfp.h>
+#include <linux/if_ether.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/printk.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+#include <linux/skbuff.h>
+#include <linux/stddef.h>
+#include <linux/types.h>
+#include <net/genetlink.h>
+#include <net/netlink.h>
+#include <net/sock.h>
+#include <uapi/linux/batadv_packet.h>
+#include <uapi/linux/batman_adv.h>
+
+#include "bat_algo.h"
+#include "bridge_loop_avoidance.h"
+#include "distributed-arp-table.h"
+#include "gateway_client.h"
+#include "hard-interface.h"
+#include "multicast.h"
+#include "originator.h"
+#include "soft-interface.h"
+#include "tp_meter.h"
+#include "translation-table.h"
+
+struct genl_family batadv_netlink_family;
+
+/* multicast groups */
+enum batadv_netlink_multicast_groups {
+	BATADV_NL_MCGRP_TPMETER,
+};
+
+static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
+	[BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
+};
+
+static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
+	[BATADV_ATTR_VERSION]			= { .type = NLA_STRING },
+	[BATADV_ATTR_ALGO_NAME]			= { .type = NLA_STRING },
+	[BATADV_ATTR_MESH_IFINDEX]		= { .type = NLA_U32 },
+	[BATADV_ATTR_MESH_IFNAME]		= { .type = NLA_STRING },
+	[BATADV_ATTR_MESH_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_HARD_IFINDEX]		= { .type = NLA_U32 },
+	[BATADV_ATTR_HARD_IFNAME]		= { .type = NLA_STRING },
+	[BATADV_ATTR_HARD_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_ORIG_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_TPMETER_RESULT]		= { .type = NLA_U8 },
+	[BATADV_ATTR_TPMETER_TEST_TIME]		= { .type = NLA_U32 },
+	[BATADV_ATTR_TPMETER_BYTES]		= { .type = NLA_U64 },
+	[BATADV_ATTR_TPMETER_COOKIE]		= { .type = NLA_U32 },
+	[BATADV_ATTR_ACTIVE]			= { .type = NLA_FLAG },
+	[BATADV_ATTR_TT_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_TT_TTVN]			= { .type = NLA_U8 },
+	[BATADV_ATTR_TT_LAST_TTVN]		= { .type = NLA_U8 },
+	[BATADV_ATTR_TT_CRC32]			= { .type = NLA_U32 },
+	[BATADV_ATTR_TT_VID]			= { .type = NLA_U16 },
+	[BATADV_ATTR_TT_FLAGS]			= { .type = NLA_U32 },
+	[BATADV_ATTR_FLAG_BEST]			= { .type = NLA_FLAG },
+	[BATADV_ATTR_LAST_SEEN_MSECS]		= { .type = NLA_U32 },
+	[BATADV_ATTR_NEIGH_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_TQ]			= { .type = NLA_U8 },
+	[BATADV_ATTR_THROUGHPUT]		= { .type = NLA_U32 },
+	[BATADV_ATTR_BANDWIDTH_UP]		= { .type = NLA_U32 },
+	[BATADV_ATTR_BANDWIDTH_DOWN]		= { .type = NLA_U32 },
+	[BATADV_ATTR_ROUTER]			= { .len = ETH_ALEN },
+	[BATADV_ATTR_BLA_OWN]			= { .type = NLA_FLAG },
+	[BATADV_ATTR_BLA_ADDRESS]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_BLA_VID]			= { .type = NLA_U16 },
+	[BATADV_ATTR_BLA_BACKBONE]		= { .len = ETH_ALEN },
+	[BATADV_ATTR_BLA_CRC]			= { .type = NLA_U16 },
+	[BATADV_ATTR_DAT_CACHE_IP4ADDRESS]	= { .type = NLA_U32 },
+	[BATADV_ATTR_DAT_CACHE_HWADDRESS]	= { .len = ETH_ALEN },
+	[BATADV_ATTR_DAT_CACHE_VID]		= { .type = NLA_U16 },
+	[BATADV_ATTR_MCAST_FLAGS]		= { .type = NLA_U32 },
+	[BATADV_ATTR_MCAST_FLAGS_PRIV]		= { .type = NLA_U32 },
+};
+
+/**
+ * batadv_netlink_get_ifindex() - Extract an interface index from a message
+ * @nlh: Message header
+ * @attrtype: Attribute which holds an interface index
+ *
+ * Return: interface index, or 0.
+ */
+int
+batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
+{
+	struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
+
+	return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
+}
+
+/**
+ * batadv_netlink_mesh_info_put() - fill in generic information about mesh
+ *  interface
+ * @msg: netlink message to be sent back
+ * @soft_iface: interface for which the data should be taken
+ *
+ * Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface)
+{
+	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
+	struct batadv_hard_iface *primary_if = NULL;
+	struct net_device *hard_iface;
+	int ret = -ENOBUFS;
+
+	if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
+	    nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
+			   bat_priv->algo_ops->name) ||
+	    nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
+	    nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
+	    nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
+		    soft_iface->dev_addr) ||
+	    nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
+		       (u8)atomic_read(&bat_priv->tt.vn)))
+		goto out;
+
+#ifdef CONFIG_BATMAN_ADV_BLA
+	if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
+			ntohs(bat_priv->bla.claim_dest.group)))
+		goto out;
+#endif
+
+	if (batadv_mcast_mesh_info_put(msg, bat_priv))
+		goto out;
+
+	primary_if = batadv_primary_if_get_selected(bat_priv);
+	if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
+		hard_iface = primary_if->net_dev;
+
+		if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
+				hard_iface->ifindex) ||
+		    nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+				   hard_iface->name) ||
+		    nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
+			    hard_iface->dev_addr))
+			goto out;
+	}
+
+	ret = 0;
+
+ out:
+	if (primary_if)
+		batadv_hardif_put(primary_if);
+
+	return ret;
+}
+
+/**
+ * batadv_netlink_get_mesh_info() - handle incoming BATADV_CMD_GET_MESH_INFO
+ *  netlink request
+ * @skb: received netlink message
+ * @info: receiver information
+ *
+ * Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = genl_info_net(info);
+	struct net_device *soft_iface;
+	struct sk_buff *msg = NULL;
+	void *msg_head;
+	int ifindex;
+	int ret;
+
+	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
+		return -EINVAL;
+
+	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
+	if (!ifindex)
+		return -EINVAL;
+
+	soft_iface = dev_get_by_index(net, ifindex);
+	if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+			       &batadv_netlink_family, 0,
+			       BATADV_CMD_GET_MESH_INFO);
+	if (!msg_head) {
+		ret = -ENOBUFS;
+		goto out;
+	}
+
+	ret = batadv_netlink_mesh_info_put(msg, soft_iface);
+
+ out:
+	if (soft_iface)
+		dev_put(soft_iface);
+
+	if (ret) {
+		if (msg)
+			nlmsg_free(msg);
+		return ret;
+	}
+
+	genlmsg_end(msg, msg_head);
+	return genlmsg_reply(msg, info);
+}
+
+/**
+ * batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
+ * @msg: netlink message to be sent back
+ * @cookie: tp meter session cookie
+ *
+ *  Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
+{
+	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
+		return -ENOBUFS;
+
+	return 0;
+}
+
+/**
+ * batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
+ * @bat_priv: the bat priv with all the soft interface information
+ * @dst: destination of tp_meter session
+ * @result: reason for tp meter session stop
+ * @test_time: total time ot the tp_meter session
+ * @total_bytes: bytes acked to the receiver
+ * @cookie: cookie of tp_meter session
+ *
+ * Return: 0 on success, < 0 on error
+ */
+int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
+				  u8 result, u32 test_time, u64 total_bytes,
+				  u32 cookie)
+{
+	struct sk_buff *msg;
+	void *hdr;
+	int ret;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
+			  BATADV_CMD_TP_METER);
+	if (!hdr) {
+		ret = -ENOBUFS;
+		goto err_genlmsg;
+	}
+
+	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
+		goto nla_put_failure;
+
+	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
+		goto nla_put_failure;
+
+	if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
+			      BATADV_ATTR_PAD))
+		goto nla_put_failure;
+
+	if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
+		goto nla_put_failure;
+
+	if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
+		goto nla_put_failure;
+
+	genlmsg_end(msg, hdr);
+
+	genlmsg_multicast_netns(&batadv_netlink_family,
+				dev_net(bat_priv->soft_iface), msg, 0,
+				BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
+
+	return 0;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	ret = -EMSGSIZE;
+
+err_genlmsg:
+	nlmsg_free(msg);
+	return ret;
+}
+
+/**
+ * batadv_netlink_tp_meter_start() - Start a new tp_meter session
+ * @skb: received netlink message
+ * @info: receiver information
+ *
+ * Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = genl_info_net(info);
+	struct net_device *soft_iface;
+	struct batadv_priv *bat_priv;
+	struct sk_buff *msg = NULL;
+	u32 test_length;
+	void *msg_head;
+	int ifindex;
+	u32 cookie;
+	u8 *dst;
+	int ret;
+
+	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
+		return -EINVAL;
+
+	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
+		return -EINVAL;
+
+	if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
+		return -EINVAL;
+
+	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
+	if (!ifindex)
+		return -EINVAL;
+
+	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
+
+	test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
+
+	soft_iface = dev_get_by_index(net, ifindex);
+	if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
+			       &batadv_netlink_family, 0,
+			       BATADV_CMD_TP_METER);
+	if (!msg_head) {
+		ret = -ENOBUFS;
+		goto out;
+	}
+
+	bat_priv = netdev_priv(soft_iface);
+	batadv_tp_start(bat_priv, dst, test_length, &cookie);
+
+	ret = batadv_netlink_tp_meter_put(msg, cookie);
+
+ out:
+	if (soft_iface)
+		dev_put(soft_iface);
+
+	if (ret) {
+		if (msg)
+			nlmsg_free(msg);
+		return ret;
+	}
+
+	genlmsg_end(msg, msg_head);
+	return genlmsg_reply(msg, info);
+}
+
+/**
+ * batadv_netlink_tp_meter_start() - Cancel a running tp_meter session
+ * @skb: received netlink message
+ * @info: receiver information
+ *
+ * Return: 0 on success, < 0 on error
+ */
+static int
+batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = genl_info_net(info);
+	struct net_device *soft_iface;
+	struct batadv_priv *bat_priv;
+	int ifindex;
+	u8 *dst;
+	int ret = 0;
+
+	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
+		return -EINVAL;
+
+	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
+		return -EINVAL;
+
+	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
+	if (!ifindex)
+		return -EINVAL;
+
+	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
+
+	soft_iface = dev_get_by_index(net, ifindex);
+	if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	bat_priv = netdev_priv(soft_iface);
+	batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
+
+out:
+	if (soft_iface)
+		dev_put(soft_iface);
+
+	return ret;
+}
+
+/**
+ * batadv_netlink_dump_hardif_entry() - Dump one hard interface into a message
+ * @msg: Netlink message to dump into
+ * @portid: Port making netlink request
+ * @seq: Sequence number of netlink message
+ * @hard_iface: Hard interface to dump
+ *
+ * Return: error code, or 0 on success
+ */
+static int
+batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
+				 struct batadv_hard_iface *hard_iface)
+{
+	struct net_device *net_dev = hard_iface->net_dev;
+	void *hdr;
+
+	hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
+			  BATADV_CMD_GET_HARDIFS);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
+			net_dev->ifindex) ||
+	    nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+			   net_dev->name) ||
+	    nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
+		    net_dev->dev_addr))
+		goto nla_put_failure;
+
+	if (hard_iface->if_status == BATADV_IF_ACTIVE) {
+		if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
+			goto nla_put_failure;
+	}
+
+	genlmsg_end(msg, hdr);
+	return 0;
+
+ nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+/**
+ * batadv_netlink_dump_hardifs() - Dump all hard interface into a messages
+ * @msg: Netlink message to dump into
+ * @cb: Parameters from query
+ *
+ * Return: error code, or length of reply message on success
+ */
+static int
+batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb)
+{
+	struct net *net = sock_net(cb->skb->sk);
+	struct net_device *soft_iface;
+	struct batadv_hard_iface *hard_iface;
+	int ifindex;
+	int portid = NETLINK_CB(cb->skb).portid;
+	int seq = cb->nlh->nlmsg_seq;
+	int skip = cb->args[0];
+	int i = 0;
+
+	ifindex = batadv_netlink_get_ifindex(cb->nlh,
+					     BATADV_ATTR_MESH_IFINDEX);
+	if (!ifindex)
+		return -EINVAL;
+
+	soft_iface = dev_get_by_index(net, ifindex);
+	if (!soft_iface)
+		return -ENODEV;
+
+	if (!batadv_softif_is_valid(soft_iface)) {
+		dev_put(soft_iface);
+		return -ENODEV;
+	}
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
+		if (hard_iface->soft_iface != soft_iface)
+			continue;
+
+		if (i++ < skip)
+			continue;
+
+		if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
+						     hard_iface)) {
+			i--;
+			break;
+		}
+	}
+
+	rcu_read_unlock();
+
+	dev_put(soft_iface);
+
+	cb->args[0] = i;
+
+	return msg->len;
+}
+
+static const struct genl_ops batadv_netlink_ops[] = {
+	{
+		.cmd = BATADV_CMD_GET_MESH_INFO,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.doit = batadv_netlink_get_mesh_info,
+	},
+	{
+		.cmd = BATADV_CMD_TP_METER,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.doit = batadv_netlink_tp_meter_start,
+	},
+	{
+		.cmd = BATADV_CMD_TP_METER_CANCEL,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.doit = batadv_netlink_tp_meter_cancel,
+	},
+	{
+		.cmd = BATADV_CMD_GET_ROUTING_ALGOS,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_algo_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_HARDIFS,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_netlink_dump_hardifs,
+	},
+	{
+		.cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_tt_local_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_tt_global_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_ORIGINATORS,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_orig_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_NEIGHBORS,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_hardif_neigh_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_GATEWAYS,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_gw_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_BLA_CLAIM,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_bla_claim_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_BLA_BACKBONE,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_bla_backbone_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_DAT_CACHE,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_dat_cache_dump,
+	},
+	{
+		.cmd = BATADV_CMD_GET_MCAST_FLAGS,
+		.flags = GENL_ADMIN_PERM,
+		.policy = batadv_netlink_policy,
+		.dumpit = batadv_mcast_flags_dump,
+	},
+
+};
+
+struct genl_family batadv_netlink_family __ro_after_init = {
+	.hdrsize = 0,
+	.name = BATADV_NL_NAME,
+	.version = 1,
+	.maxattr = BATADV_ATTR_MAX,
+	.netnsok = true,
+	.module = THIS_MODULE,
+	.ops = batadv_netlink_ops,
+	.n_ops = ARRAY_SIZE(batadv_netlink_ops),
+	.mcgrps = batadv_netlink_mcgrps,
+	.n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
+};
+
+/**
+ * batadv_netlink_register() - register batadv genl netlink family
+ */
+void __init batadv_netlink_register(void)
+{
+	int ret;
+
+	ret = genl_register_family(&batadv_netlink_family);
+	if (ret)
+		pr_warn("unable to register netlink family");
+}
+
+/**
+ * batadv_netlink_unregister() - unregister batadv genl netlink family
+ */
+void batadv_netlink_unregister(void)
+{
+	genl_unregister_family(&batadv_netlink_family);
+}