[linux-2.6-block.git] / net / batman-adv / netlink.c

// 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 "gateway_client.h"
#include "hard-interface.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_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_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

	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,
	},

};

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);
}
Commit	Line	Data
7db7d9f3	1	// SPDX-License-Identifier: GPL-2.0
6b1aea8c	2	/* Copyright (C) 2016-2018 B.A.T.M.A.N. contributors:
09748a22 MS	3	*
	4	* Matthias Schiffer
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of version 2 of the GNU General Public
	8	* License as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	17	*/
	18
	19	#include "netlink.h"
	20	#include "main.h"
	21
f32ed4b5	22	#include <linux/atomic.h>
8dad6f0d	23	#include <linux/byteorder/generic.h>
9bcb94c8	24	#include <linux/cache.h>
5da0aef5	25	#include <linux/errno.h>
9bcb94c8	26	#include <linux/export.h>
09748a22	27	#include <linux/genetlink.h>
b92b94ac	28	#include <linux/gfp.h>
5da0aef5	29	#include <linux/if_ether.h>
09748a22	30	#include <linux/init.h>
9bcb94c8	31	#include <linux/kernel.h>
5da0aef5 MS	32	#include <linux/netdevice.h>
5da0aef5 MS	33	#include <linux/netlink.h>
09748a22	34	#include <linux/printk.h>
b60620cf MS	35	#include <linux/rculist.h>
	36	#include <linux/rcupdate.h>
	37	#include <linux/skbuff.h>
5da0aef5	38	#include <linux/stddef.h>
33a3bb4a	39	#include <linux/types.h>
09748a22	40	#include <net/genetlink.h>
5da0aef5	41	#include <net/netlink.h>
b60620cf	42	#include <net/sock.h>
fec149f5	43	#include <uapi/linux/batadv_packet.h>
09748a22 MS	44	#include <uapi/linux/batman_adv.h>
09748a22 MS	45
07a3061e	46	#include "bat_algo.h"
04f3f5bf	47	#include "bridge_loop_avoidance.h"
d7129daf	48	#include "gateway_client.h"
5da0aef5	49	#include "hard-interface.h"
85cf8c85	50	#include "originator.h"
5da0aef5	51	#include "soft-interface.h"
33a3bb4a	52	#include "tp_meter.h"
d34f0550	53	#include "translation-table.h"
5da0aef5	54
489111e5	55	struct genl_family batadv_netlink_family;
09748a22	56
33a3bb4a AQ	57	/* multicast groups */
	58	enum batadv_netlink_multicast_groups {
	59	BATADV_NL_MCGRP_TPMETER,
	60	};
	61
deeb91f5	62	static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
33a3bb4a AQ	63	[BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
	64	};
	65
deeb91f5	66	static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
5da0aef5 MS	67	[BATADV_ATTR_VERSION] = { .type = NLA_STRING },
	68	[BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
	69	[BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
	70	[BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
	71	[BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
	72	[BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
	73	[BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
	74	[BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
33a3bb4a AQ	75	[BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
	76	[BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
	77	[BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
	78	[BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
	79	[BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
b60620cf	80	[BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
d34f0550 MS	81	[BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
	82	[BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
	83	[BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
	84	[BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
	85	[BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
	86	[BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
	87	[BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
	88	[BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
024f99cb MS	89	[BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
024f99cb MS	90	[BATADV_ATTR_TQ] = { .type = NLA_U8 },
f02a478f	91	[BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
d7129daf SE	92	[BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
	93	[BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
	94	[BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
04f3f5bf AL	95	[BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
	96	[BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
	97	[BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
	98	[BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
	99	[BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
5da0aef5 MS	100	};
5da0aef5 MS	101
b60620cf	102	/**
7e9a8c2c	103	* batadv_netlink_get_ifindex() - Extract an interface index from a message
b60620cf MS	104	* @nlh: Message header
	105	* @attrtype: Attribute which holds an interface index
	106	*
	107	* Return: interface index, or 0.
	108	*/
d34f0550	109	int
b60620cf MS	110	batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
	111	{
	112	struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
	113
	114	return attr ? nla_get_u32(attr) : 0;
	115	}
	116
5da0aef5	117	/**
7e9a8c2c	118	* batadv_netlink_mesh_info_put() - fill in generic information about mesh
5da0aef5 MS	119	* interface
	120	* @msg: netlink message to be sent back
	121	* @soft_iface: interface for which the data should be taken
	122	*
	123	* Return: 0 on success, < 0 on error
	124	*/
	125	static int
	126	batadv_netlink_mesh_info_put(struct sk_buff msg, struct net_device soft_iface)
	127	{
	128	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
	129	struct batadv_hard_iface *primary_if = NULL;
	130	struct net_device *hard_iface;
	131	int ret = -ENOBUFS;
	132
	133	if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) \|\|
	134	nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
29824a55	135	bat_priv->algo_ops->name) \|\|
5da0aef5 MS	136	nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) \|\|
	137	nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) \|\|
	138	nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
f32ed4b5 SE	139	soft_iface->dev_addr) \|\|
	140	nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
	141	(u8)atomic_read(&bat_priv->tt.vn)))
5da0aef5 MS	142	goto out;
5da0aef5 MS	143
8dad6f0d SE	144	#ifdef CONFIG_BATMAN_ADV_BLA
	145	if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
	146	ntohs(bat_priv->bla.claim_dest.group)))
	147	goto out;
	148	#endif
	149
5da0aef5 MS	150	primary_if = batadv_primary_if_get_selected(bat_priv);
	151	if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
	152	hard_iface = primary_if->net_dev;
	153
	154	if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
	155	hard_iface->ifindex) \|\|
	156	nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
	157	hard_iface->name) \|\|
	158	nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
	159	hard_iface->dev_addr))
	160	goto out;
	161	}
	162
	163	ret = 0;
	164
	165	out:
	166	if (primary_if)
	167	batadv_hardif_put(primary_if);
	168
	169	return ret;
	170	}
	171
	172	/**
7e9a8c2c	173	* batadv_netlink_get_mesh_info() - handle incoming BATADV_CMD_GET_MESH_INFO
5da0aef5 MS	174	* netlink request
	175	* @skb: received netlink message
	176	* @info: receiver information
	177	*
	178	* Return: 0 on success, < 0 on error
	179	*/
	180	static int
	181	batadv_netlink_get_mesh_info(struct sk_buff skb, struct genl_info info)
	182	{
	183	struct net *net = genl_info_net(info);
	184	struct net_device *soft_iface;
	185	struct sk_buff *msg = NULL;
	186	void *msg_head;
	187	int ifindex;
	188	int ret;
	189
	190	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
	191	return -EINVAL;
	192
	193	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
	194	if (!ifindex)
	195	return -EINVAL;
	196
	197	soft_iface = dev_get_by_index(net, ifindex);
	198	if (!soft_iface \|\| !batadv_softif_is_valid(soft_iface)) {
	199	ret = -ENODEV;
	200	goto out;
	201	}
	202
	203	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	204	if (!msg) {
	205	ret = -ENOMEM;
	206	goto out;
	207	}
	208
	209	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
	210	&batadv_netlink_family, 0,
	211	BATADV_CMD_GET_MESH_INFO);
	212	if (!msg_head) {
	213	ret = -ENOBUFS;
	214	goto out;
	215	}
	216
	217	ret = batadv_netlink_mesh_info_put(msg, soft_iface);
	218
	219	out:
	220	if (soft_iface)
	221	dev_put(soft_iface);
	222
	223	if (ret) {
	224	if (msg)
	225	nlmsg_free(msg);
	226	return ret;
	227	}
	228
	229	genlmsg_end(msg, msg_head);
	230	return genlmsg_reply(msg, info);
	231	}
	232
33a3bb4a	233	/**
7e9a8c2c	234	* batadv_netlink_tp_meter_put() - Fill information of started tp_meter session
33a3bb4a AQ	235	* @msg: netlink message to be sent back
	236	* @cookie: tp meter session cookie
	237	*
	238	* Return: 0 on success, < 0 on error
	239	*/
	240	static int
	241	batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
	242	{
	243	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
	244	return -ENOBUFS;
	245
	246	return 0;
	247	}
	248
	249	/**
7e9a8c2c	250	* batadv_netlink_tpmeter_notify() - send tp_meter result via netlink to client
33a3bb4a AQ	251	* @bat_priv: the bat priv with all the soft interface information
	252	* @dst: destination of tp_meter session
	253	* @result: reason for tp meter session stop
	254	* @test_time: total time ot the tp_meter session
	255	* @total_bytes: bytes acked to the receiver
	256	* @cookie: cookie of tp_meter session
	257	*
	258	* Return: 0 on success, < 0 on error
	259	*/
	260	int batadv_netlink_tpmeter_notify(struct batadv_priv bat_priv, const u8 dst,
	261	u8 result, u32 test_time, u64 total_bytes,
	262	u32 cookie)
	263	{
	264	struct sk_buff *msg;
	265	void *hdr;
	266	int ret;
	267
	268	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	269	if (!msg)
	270	return -ENOMEM;
	271
	272	hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
	273	BATADV_CMD_TP_METER);
	274	if (!hdr) {
	275	ret = -ENOBUFS;
	276	goto err_genlmsg;
	277	}
	278
	279	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
	280	goto nla_put_failure;
	281
	282	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
	283	goto nla_put_failure;
	284
	285	if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
	286	BATADV_ATTR_PAD))
	287	goto nla_put_failure;
	288
	289	if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
	290	goto nla_put_failure;
	291
	292	if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
	293	goto nla_put_failure;
	294
	295	genlmsg_end(msg, hdr);
	296
	297	genlmsg_multicast_netns(&batadv_netlink_family,
	298	dev_net(bat_priv->soft_iface), msg, 0,
	299	BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
	300
	301	return 0;
	302
	303	nla_put_failure:
	304	genlmsg_cancel(msg, hdr);
	305	ret = -EMSGSIZE;
	306
	307	err_genlmsg:
	308	nlmsg_free(msg);
	309	return ret;
	310	}
	311
	312	/**
7e9a8c2c	313	* batadv_netlink_tp_meter_start() - Start a new tp_meter session
33a3bb4a AQ	314	* @skb: received netlink message
	315	* @info: receiver information
	316	*
	317	* Return: 0 on success, < 0 on error
	318	*/
	319	static int
	320	batadv_netlink_tp_meter_start(struct sk_buff skb, struct genl_info info)
	321	{
	322	struct net *net = genl_info_net(info);
	323	struct net_device *soft_iface;
	324	struct batadv_priv *bat_priv;
	325	struct sk_buff *msg = NULL;
	326	u32 test_length;
	327	void *msg_head;
	328	int ifindex;
	329	u32 cookie;
	330	u8 *dst;
	331	int ret;
	332
	333	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
	334	return -EINVAL;
	335
	336	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
	337	return -EINVAL;
	338
	339	if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
	340	return -EINVAL;
	341
	342	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
	343	if (!ifindex)
	344	return -EINVAL;
	345
	346	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
	347
	348	test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
	349
	350	soft_iface = dev_get_by_index(net, ifindex);
	351	if (!soft_iface \|\| !batadv_softif_is_valid(soft_iface)) {
	352	ret = -ENODEV;
	353	goto out;
	354	}
	355
	356	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	357	if (!msg) {
	358	ret = -ENOMEM;
	359	goto out;
	360	}
	361
	362	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
	363	&batadv_netlink_family, 0,
	364	BATADV_CMD_TP_METER);
	365	if (!msg_head) {
	366	ret = -ENOBUFS;
	367	goto out;
	368	}
	369
	370	bat_priv = netdev_priv(soft_iface);
	371	batadv_tp_start(bat_priv, dst, test_length, &cookie);
	372
	373	ret = batadv_netlink_tp_meter_put(msg, cookie);
	374
	375	out:
	376	if (soft_iface)
	377	dev_put(soft_iface);
378
379	if (ret) {
380	if (msg)
381	nlmsg_free(msg);
382	return ret;
383	}
384
385	genlmsg_end(msg, msg_head);
386	return genlmsg_reply(msg, info);
387	}
388
389	/**
7e9a8c2c	390	* batadv_netlink_tp_meter_start() - Cancel a running tp_meter session
33a3bb4a AQ	391	* @skb: received netlink message
	392	* @info: receiver information
	393	*
	394	* Return: 0 on success, < 0 on error
	395	*/
	396	static int
	397	batadv_netlink_tp_meter_cancel(struct sk_buff skb, struct genl_info info)
	398	{
	399	struct net *net = genl_info_net(info);
	400	struct net_device *soft_iface;
	401	struct batadv_priv *bat_priv;
	402	int ifindex;
	403	u8 *dst;
	404	int ret = 0;
	405
	406	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
	407	return -EINVAL;
	408
	409	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
	410	return -EINVAL;
	411
	412	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
	413	if (!ifindex)
	414	return -EINVAL;
	415
	416	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
	417
	418	soft_iface = dev_get_by_index(net, ifindex);
	419	if (!soft_iface \|\| !batadv_softif_is_valid(soft_iface)) {
	420	ret = -ENODEV;
	421	goto out;
	422	}
	423
	424	bat_priv = netdev_priv(soft_iface);
	425	batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
	426
	427	out:
	428	if (soft_iface)
	429	dev_put(soft_iface);
	430
	431	return ret;
	432	}
	433
b60620cf	434	/**
7e9a8c2c	435	* batadv_netlink_dump_hardif_entry() - Dump one hard interface into a message
b60620cf MS	436	* @msg: Netlink message to dump into
	437	* @portid: Port making netlink request
	438	* @seq: Sequence number of netlink message
	439	* @hard_iface: Hard interface to dump
	440	*
	441	* Return: error code, or 0 on success
	442	*/
	443	static int
	444	batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
	445	struct batadv_hard_iface *hard_iface)
	446	{
	447	struct net_device *net_dev = hard_iface->net_dev;
	448	void *hdr;
	449
	450	hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
	451	BATADV_CMD_GET_HARDIFS);
	452	if (!hdr)
	453	return -EMSGSIZE;
	454
	455	if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
	456	net_dev->ifindex) \|\|
	457	nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
	458	net_dev->name) \|\|
	459	nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
	460	net_dev->dev_addr))
	461	goto nla_put_failure;
	462
	463	if (hard_iface->if_status == BATADV_IF_ACTIVE) {
	464	if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
	465	goto nla_put_failure;
	466	}
	467
	468	genlmsg_end(msg, hdr);
	469	return 0;
	470
	471	nla_put_failure:
	472	genlmsg_cancel(msg, hdr);
	473	return -EMSGSIZE;
	474	}
	475
	476	/**
7e9a8c2c	477	* batadv_netlink_dump_hardifs() - Dump all hard interface into a messages
b60620cf MS	478	* @msg: Netlink message to dump into
	479	* @cb: Parameters from query
	480	*
	481	* Return: error code, or length of reply message on success
	482	*/
	483	static int
	484	batadv_netlink_dump_hardifs(struct sk_buff msg, struct netlink_callback cb)
	485	{
	486	struct net *net = sock_net(cb->skb->sk);
	487	struct net_device *soft_iface;
	488	struct batadv_hard_iface *hard_iface;
	489	int ifindex;
	490	int portid = NETLINK_CB(cb->skb).portid;
	491	int seq = cb->nlh->nlmsg_seq;
	492	int skip = cb->args[0];
	493	int i = 0;
	494
	495	ifindex = batadv_netlink_get_ifindex(cb->nlh,
	496	BATADV_ATTR_MESH_IFINDEX);
	497	if (!ifindex)
	498	return -EINVAL;
	499
	500	soft_iface = dev_get_by_index(net, ifindex);
	501	if (!soft_iface)
	502	return -ENODEV;
	503
	504	if (!batadv_softif_is_valid(soft_iface)) {
	505	dev_put(soft_iface);
	506	return -ENODEV;
	507	}
	508
	509	rcu_read_lock();
	510
	511	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
	512	if (hard_iface->soft_iface != soft_iface)
	513	continue;
	514
	515	if (i++ < skip)
	516	continue;
	517
	518	if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
	519	hard_iface)) {
	520	i--;
	521	break;
	522	}
	523	}
	524
	525	rcu_read_unlock();
	526
	527	dev_put(soft_iface);
	528
	529	cb->args[0] = i;
	530
	531	return msg->len;
	532	}
	533
ce1a21d1	534	static const struct genl_ops batadv_netlink_ops[] = {
5da0aef5 MS	535	{
	536	.cmd = BATADV_CMD_GET_MESH_INFO,
	537	.flags = GENL_ADMIN_PERM,
	538	.policy = batadv_netlink_policy,
	539	.doit = batadv_netlink_get_mesh_info,
	540	},
33a3bb4a AQ	541	{
	542	.cmd = BATADV_CMD_TP_METER,
	543	.flags = GENL_ADMIN_PERM,
	544	.policy = batadv_netlink_policy,
	545	.doit = batadv_netlink_tp_meter_start,
	546	},
	547	{
	548	.cmd = BATADV_CMD_TP_METER_CANCEL,
	549	.flags = GENL_ADMIN_PERM,
	550	.policy = batadv_netlink_policy,
	551	.doit = batadv_netlink_tp_meter_cancel,
	552	},
07a3061e MS	553	{
	554	.cmd = BATADV_CMD_GET_ROUTING_ALGOS,
	555	.flags = GENL_ADMIN_PERM,
	556	.policy = batadv_netlink_policy,
	557	.dumpit = batadv_algo_dump,
	558	},
b60620cf MS	559	{
	560	.cmd = BATADV_CMD_GET_HARDIFS,
	561	.flags = GENL_ADMIN_PERM,
	562	.policy = batadv_netlink_policy,
	563	.dumpit = batadv_netlink_dump_hardifs,
	564	},
d34f0550 MS	565	{
	566	.cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
	567	.flags = GENL_ADMIN_PERM,
	568	.policy = batadv_netlink_policy,
	569	.dumpit = batadv_tt_local_dump,
	570	},
	571	{
	572	.cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
	573	.flags = GENL_ADMIN_PERM,
	574	.policy = batadv_netlink_policy,
	575	.dumpit = batadv_tt_global_dump,
	576	},
85cf8c85 MS	577	{
	578	.cmd = BATADV_CMD_GET_ORIGINATORS,
	579	.flags = GENL_ADMIN_PERM,
	580	.policy = batadv_netlink_policy,
	581	.dumpit = batadv_orig_dump,
	582	},
	583	{
	584	.cmd = BATADV_CMD_GET_NEIGHBORS,
	585	.flags = GENL_ADMIN_PERM,
	586	.policy = batadv_netlink_policy,
	587	.dumpit = batadv_hardif_neigh_dump,
	588	},
d7129daf SE	589	{
	590	.cmd = BATADV_CMD_GET_GATEWAYS,
	591	.flags = GENL_ADMIN_PERM,
	592	.policy = batadv_netlink_policy,
	593	.dumpit = batadv_gw_dump,
	594	},
04f3f5bf AL	595	{
	596	.cmd = BATADV_CMD_GET_BLA_CLAIM,
	597	.flags = GENL_ADMIN_PERM,
	598	.policy = batadv_netlink_policy,
	599	.dumpit = batadv_bla_claim_dump,
	600	},
ea4152e1 SW	601	{
	602	.cmd = BATADV_CMD_GET_BLA_BACKBONE,
	603	.flags = GENL_ADMIN_PERM,
	604	.policy = batadv_netlink_policy,
	605	.dumpit = batadv_bla_backbone_dump,
	606	},
	607
09748a22 MS	608	};
09748a22 MS	609
56989f6d	610	struct genl_family batadv_netlink_family __ro_after_init = {
489111e5 JB	611	.hdrsize = 0,
	612	.name = BATADV_NL_NAME,
	613	.version = 1,
	614	.maxattr = BATADV_ATTR_MAX,
	615	.netnsok = true,
	616	.module = THIS_MODULE,
	617	.ops = batadv_netlink_ops,
	618	.n_ops = ARRAY_SIZE(batadv_netlink_ops),
	619	.mcgrps = batadv_netlink_mcgrps,
	620	.n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
	621	};
	622
09748a22	623	/**
7e9a8c2c	624	* batadv_netlink_register() - register batadv genl netlink family
09748a22 MS	625	*/
	626	void __init batadv_netlink_register(void)
	627	{
	628	int ret;
	629
489111e5	630	ret = genl_register_family(&batadv_netlink_family);
09748a22 MS	631	if (ret)
	632	pr_warn("unable to register netlink family");
	633	}
	634
	635	/**
7e9a8c2c	636	* batadv_netlink_unregister() - unregister batadv genl netlink family
09748a22 MS	637	*/
	638	void batadv_netlink_unregister(void)
	639	{
	640	genl_unregister_family(&batadv_netlink_family);
	641	}