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

/* Copyright (C) 2016 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/errno.h>
#include <linux/fs.h>
#include <linux/genetlink.h>
#include <linux/if_ether.h>
#include <linux/init.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/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 = {
	.id = GENL_ID_GENERATE,
	.hdrsize = 0,
	.name = BATADV_NL_NAME,
	.version = 1,
	.maxattr = BATADV_ATTR_MAX,
};

/* multicast groups */
enum batadv_netlink_multicast_groups {
	BATADV_NL_MCGRP_TPMETER,
};

static struct genl_multicast_group batadv_netlink_mcgrps[] = {
	[BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
};

static 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;

	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 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,
	},
};

/**
 * batadv_netlink_register - register batadv genl netlink family
 */
void __init batadv_netlink_register(void)
{
	int ret;

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