[mirror_ubuntu-jammy-kernel.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 "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_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,
	},
};

/**
 * 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"
5da0aef5	41	#include "hard-interface.h"
85cf8c85	42	#include "originator.h"
5da0aef5	43	#include "soft-interface.h"
33a3bb4a	44	#include "tp_meter.h"
d34f0550	45	#include "translation-table.h"
5da0aef5	46
07a3061e	47	struct genl_family batadv_netlink_family = {
09748a22 MS	48	.id = GENL_ID_GENERATE,
	49	.hdrsize = 0,
	50	.name = BATADV_NL_NAME,
	51	.version = 1,
	52	.maxattr = BATADV_ATTR_MAX,
	53	};
	54
33a3bb4a AQ	55	/* multicast groups */
	56	enum batadv_netlink_multicast_groups {
	57	BATADV_NL_MCGRP_TPMETER,
	58	};
	59
	60	static struct genl_multicast_group batadv_netlink_mcgrps[] = {
	61	[BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
	62	};
	63
5da0aef5 MS	64	static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
	65	[BATADV_ATTR_VERSION] = { .type = NLA_STRING },
	66	[BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
	67	[BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
	68	[BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
	69	[BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
	70	[BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
	71	[BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
	72	[BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
33a3bb4a AQ	73	[BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
	74	[BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
	75	[BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
	76	[BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
	77	[BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
b60620cf	78	[BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
d34f0550 MS	79	[BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
	80	[BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
	81	[BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
	82	[BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
	83	[BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
	84	[BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
	85	[BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
	86	[BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
024f99cb MS	87	[BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
024f99cb MS	88	[BATADV_ATTR_TQ] = { .type = NLA_U8 },
f02a478f	89	[BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
5da0aef5 MS	90	};
5da0aef5 MS	91
b60620cf MS	92	/**
	93	* batadv_netlink_get_ifindex - Extract an interface index from a message
	94	* @nlh: Message header
	95	* @attrtype: Attribute which holds an interface index
	96	*
	97	* Return: interface index, or 0.
	98	*/
d34f0550	99	int
b60620cf MS	100	batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
	101	{
	102	struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
	103
	104	return attr ? nla_get_u32(attr) : 0;
	105	}
	106
5da0aef5 MS	107	/**
	108	* batadv_netlink_mesh_info_put - fill in generic information about mesh
	109	* interface
	110	* @msg: netlink message to be sent back
	111	* @soft_iface: interface for which the data should be taken
	112	*
	113	* Return: 0 on success, < 0 on error
	114	*/
	115	static int
	116	batadv_netlink_mesh_info_put(struct sk_buff msg, struct net_device soft_iface)
	117	{
	118	struct batadv_priv *bat_priv = netdev_priv(soft_iface);
	119	struct batadv_hard_iface *primary_if = NULL;
	120	struct net_device *hard_iface;
	121	int ret = -ENOBUFS;
	122
	123	if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) \|\|
	124	nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
29824a55	125	bat_priv->algo_ops->name) \|\|
5da0aef5 MS	126	nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) \|\|
	127	nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) \|\|
	128	nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
f32ed4b5 SE	129	soft_iface->dev_addr) \|\|
	130	nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
	131	(u8)atomic_read(&bat_priv->tt.vn)))
5da0aef5 MS	132	goto out;
	133
	134	primary_if = batadv_primary_if_get_selected(bat_priv);
	135	if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
	136	hard_iface = primary_if->net_dev;
	137
	138	if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
	139	hard_iface->ifindex) \|\|
	140	nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
	141	hard_iface->name) \|\|
	142	nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
	143	hard_iface->dev_addr))
	144	goto out;
	145	}
	146
	147	ret = 0;
	148
	149	out:
	150	if (primary_if)
	151	batadv_hardif_put(primary_if);
	152
	153	return ret;
	154	}
	155
	156	/**
	157	* batadv_netlink_get_mesh_info - handle incoming BATADV_CMD_GET_MESH_INFO
	158	* netlink request
	159	* @skb: received netlink message
	160	* @info: receiver information
	161	*
	162	* Return: 0 on success, < 0 on error
	163	*/
	164	static int
	165	batadv_netlink_get_mesh_info(struct sk_buff skb, struct genl_info info)
	166	{
	167	struct net *net = genl_info_net(info);
	168	struct net_device *soft_iface;
	169	struct sk_buff *msg = NULL;
	170	void *msg_head;
	171	int ifindex;
	172	int ret;
	173
	174	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
	175	return -EINVAL;
	176
	177	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
	178	if (!ifindex)
	179	return -EINVAL;
	180
	181	soft_iface = dev_get_by_index(net, ifindex);
	182	if (!soft_iface \|\| !batadv_softif_is_valid(soft_iface)) {
	183	ret = -ENODEV;
	184	goto out;
	185	}
	186
	187	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	188	if (!msg) {
	189	ret = -ENOMEM;
	190	goto out;
	191	}
	192
	193	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
	194	&batadv_netlink_family, 0,
	195	BATADV_CMD_GET_MESH_INFO);
196	if (!msg_head) {
197	ret = -ENOBUFS;
198	goto out;
199	}
200
201	ret = batadv_netlink_mesh_info_put(msg, soft_iface);
202
203	out:
204	if (soft_iface)
205	dev_put(soft_iface);
206
207	if (ret) {
208	if (msg)
209	nlmsg_free(msg);
210	return ret;
211	}
212
213	genlmsg_end(msg, msg_head);
214	return genlmsg_reply(msg, info);
215	}
216
33a3bb4a AQ	217	/**
	218	* batadv_netlink_tp_meter_put - Fill information of started tp_meter session
	219	* @msg: netlink message to be sent back
	220	* @cookie: tp meter session cookie
	221	*
	222	* Return: 0 on success, < 0 on error
	223	*/
	224	static int
	225	batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
	226	{
	227	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
	228	return -ENOBUFS;
	229
	230	return 0;
	231	}
	232
	233	/**
	234	* batadv_netlink_tpmeter_notify - send tp_meter result via netlink to client
	235	* @bat_priv: the bat priv with all the soft interface information
	236	* @dst: destination of tp_meter session
	237	* @result: reason for tp meter session stop
	238	* @test_time: total time ot the tp_meter session
	239	* @total_bytes: bytes acked to the receiver
	240	* @cookie: cookie of tp_meter session
	241	*
	242	* Return: 0 on success, < 0 on error
	243	*/
	244	int batadv_netlink_tpmeter_notify(struct batadv_priv bat_priv, const u8 dst,
	245	u8 result, u32 test_time, u64 total_bytes,
	246	u32 cookie)
	247	{
	248	struct sk_buff *msg;
	249	void *hdr;
	250	int ret;
	251
	252	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	253	if (!msg)
	254	return -ENOMEM;
	255
	256	hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
	257	BATADV_CMD_TP_METER);
	258	if (!hdr) {
	259	ret = -ENOBUFS;
	260	goto err_genlmsg;
	261	}
	262
	263	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
	264	goto nla_put_failure;
	265
	266	if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
	267	goto nla_put_failure;
	268
	269	if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
	270	BATADV_ATTR_PAD))
	271	goto nla_put_failure;
	272
	273	if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
	274	goto nla_put_failure;
	275
	276	if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
	277	goto nla_put_failure;
	278
	279	genlmsg_end(msg, hdr);
	280
281	genlmsg_multicast_netns(&batadv_netlink_family,
282	dev_net(bat_priv->soft_iface), msg, 0,
283	BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
284
285	return 0;
286
287	nla_put_failure:
288	genlmsg_cancel(msg, hdr);
289	ret = -EMSGSIZE;
290
291	err_genlmsg:
292	nlmsg_free(msg);
293	return ret;
294	}
295
296	/**
297	* batadv_netlink_tp_meter_start - Start a new tp_meter session
298	* @skb: received netlink message
299	* @info: receiver information
300	*
301	* Return: 0 on success, < 0 on error
302	*/
303	static int
304	batadv_netlink_tp_meter_start(struct sk_buff skb, struct genl_info info)
305	{
306	struct net *net = genl_info_net(info);
307	struct net_device *soft_iface;
308	struct batadv_priv *bat_priv;
309	struct sk_buff *msg = NULL;
310	u32 test_length;
311	void *msg_head;
312	int ifindex;
313	u32 cookie;
314	u8 *dst;
315	int ret;
316
317	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
318	return -EINVAL;
319
320	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
321	return -EINVAL;
322
323	if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
324	return -EINVAL;
325
326	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
327	if (!ifindex)
328	return -EINVAL;
329
330	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
331
332	test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
333
334	soft_iface = dev_get_by_index(net, ifindex);
335	if (!soft_iface \|\| !batadv_softif_is_valid(soft_iface)) {
336	ret = -ENODEV;
337	goto out;
338	}
339
340	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
341	if (!msg) {
342	ret = -ENOMEM;
343	goto out;
344	}
345
346	msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
347	&batadv_netlink_family, 0,
348	BATADV_CMD_TP_METER);
349	if (!msg_head) {
350	ret = -ENOBUFS;
351	goto out;
352	}
353
354	bat_priv = netdev_priv(soft_iface);
355	batadv_tp_start(bat_priv, dst, test_length, &cookie);
356
357	ret = batadv_netlink_tp_meter_put(msg, cookie);
358
359	out:
360	if (soft_iface)
361	dev_put(soft_iface);
362
363	if (ret) {
364	if (msg)
365	nlmsg_free(msg);
366	return ret;
367	}
368
369	genlmsg_end(msg, msg_head);
370	return genlmsg_reply(msg, info);
371	}
372
373	/**
374	* batadv_netlink_tp_meter_start - Cancel a running tp_meter session
375	* @skb: received netlink message
376	* @info: receiver information
377	*
378	* Return: 0 on success, < 0 on error
379	*/
380	static int
381	batadv_netlink_tp_meter_cancel(struct sk_buff skb, struct genl_info info)
382	{
383	struct net *net = genl_info_net(info);
384	struct net_device *soft_iface;
385	struct batadv_priv *bat_priv;
386	int ifindex;
387	u8 *dst;
388	int ret = 0;
389
390	if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
391	return -EINVAL;
392
393	if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
394	return -EINVAL;
395
396	ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
397	if (!ifindex)
398	return -EINVAL;
399
400	dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
401
402	soft_iface = dev_get_by_index(net, ifindex);
403	if (!soft_iface \|\| !batadv_softif_is_valid(soft_iface)) {
404	ret = -ENODEV;
405	goto out;
406	}
407
408	bat_priv = netdev_priv(soft_iface);
409	batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
410
411	out:
412	if (soft_iface)
413	dev_put(soft_iface);
414
415	return ret;
416	}
417
b60620cf MS	418	/**
	419	* batadv_netlink_dump_hardif_entry - Dump one hard interface into a message
	420	* @msg: Netlink message to dump into
	421	* @portid: Port making netlink request
	422	* @seq: Sequence number of netlink message
	423	* @hard_iface: Hard interface to dump
	424	*
	425	* Return: error code, or 0 on success
	426	*/
	427	static int
	428	batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
	429	struct batadv_hard_iface *hard_iface)
	430	{
	431	struct net_device *net_dev = hard_iface->net_dev;
	432	void *hdr;
	433
	434	hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
	435	BATADV_CMD_GET_HARDIFS);
	436	if (!hdr)
	437	return -EMSGSIZE;
	438
	439	if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
	440	net_dev->ifindex) \|\|
	441	nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
	442	net_dev->name) \|\|
	443	nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
	444	net_dev->dev_addr))
	445	goto nla_put_failure;
	446
	447	if (hard_iface->if_status == BATADV_IF_ACTIVE) {
	448	if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
	449	goto nla_put_failure;
	450	}
	451
	452	genlmsg_end(msg, hdr);
	453	return 0;
	454
	455	nla_put_failure:
	456	genlmsg_cancel(msg, hdr);
	457	return -EMSGSIZE;
	458	}
	459
	460	/**
	461	* batadv_netlink_dump_hardifs - Dump all hard interface into a messages
	462	* @msg: Netlink message to dump into
	463	* @cb: Parameters from query
	464	*
	465	* Return: error code, or length of reply message on success
	466	*/
	467	static int
	468	batadv_netlink_dump_hardifs(struct sk_buff msg, struct netlink_callback cb)
	469	{
	470	struct net *net = sock_net(cb->skb->sk);
	471	struct net_device *soft_iface;
	472	struct batadv_hard_iface *hard_iface;
	473	int ifindex;
	474	int portid = NETLINK_CB(cb->skb).portid;
	475	int seq = cb->nlh->nlmsg_seq;
	476	int skip = cb->args[0];
	477	int i = 0;
	478
	479	ifindex = batadv_netlink_get_ifindex(cb->nlh,
	480	BATADV_ATTR_MESH_IFINDEX);
	481	if (!ifindex)
482	return -EINVAL;
483
484	soft_iface = dev_get_by_index(net, ifindex);
485	if (!soft_iface)
486	return -ENODEV;
487
488	if (!batadv_softif_is_valid(soft_iface)) {
489	dev_put(soft_iface);
490	return -ENODEV;
491	}
492
493	rcu_read_lock();
494
495	list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
496	if (hard_iface->soft_iface != soft_iface)
497	continue;
498
499	if (i++ < skip)
500	continue;
501
502	if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
503	hard_iface)) {
504	i--;
505	break;
506	}
507	}
508
509	rcu_read_unlock();
510
511	dev_put(soft_iface);
512
513	cb->args[0] = i;
514
515	return msg->len;
516	}
517
09748a22	518	static struct genl_ops batadv_netlink_ops[] = {
5da0aef5 MS	519	{
	520	.cmd = BATADV_CMD_GET_MESH_INFO,
	521	.flags = GENL_ADMIN_PERM,
	522	.policy = batadv_netlink_policy,
	523	.doit = batadv_netlink_get_mesh_info,
	524	},
33a3bb4a AQ	525	{
	526	.cmd = BATADV_CMD_TP_METER,
	527	.flags = GENL_ADMIN_PERM,
	528	.policy = batadv_netlink_policy,
	529	.doit = batadv_netlink_tp_meter_start,
	530	},
	531	{
	532	.cmd = BATADV_CMD_TP_METER_CANCEL,
	533	.flags = GENL_ADMIN_PERM,
	534	.policy = batadv_netlink_policy,
	535	.doit = batadv_netlink_tp_meter_cancel,
	536	},
07a3061e MS	537	{
	538	.cmd = BATADV_CMD_GET_ROUTING_ALGOS,
	539	.flags = GENL_ADMIN_PERM,
	540	.policy = batadv_netlink_policy,
	541	.dumpit = batadv_algo_dump,
	542	},
b60620cf MS	543	{
	544	.cmd = BATADV_CMD_GET_HARDIFS,
	545	.flags = GENL_ADMIN_PERM,
	546	.policy = batadv_netlink_policy,
	547	.dumpit = batadv_netlink_dump_hardifs,
	548	},
d34f0550 MS	549	{
	550	.cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
	551	.flags = GENL_ADMIN_PERM,
	552	.policy = batadv_netlink_policy,
	553	.dumpit = batadv_tt_local_dump,
	554	},
	555	{
	556	.cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
	557	.flags = GENL_ADMIN_PERM,
	558	.policy = batadv_netlink_policy,
	559	.dumpit = batadv_tt_global_dump,
	560	},
85cf8c85 MS	561	{
	562	.cmd = BATADV_CMD_GET_ORIGINATORS,
	563	.flags = GENL_ADMIN_PERM,
	564	.policy = batadv_netlink_policy,
	565	.dumpit = batadv_orig_dump,
	566	},
	567	{
	568	.cmd = BATADV_CMD_GET_NEIGHBORS,
	569	.flags = GENL_ADMIN_PERM,
	570	.policy = batadv_netlink_policy,
	571	.dumpit = batadv_hardif_neigh_dump,
	572	},
09748a22 MS	573	};
	574
	575	/**
	576	* batadv_netlink_register - register batadv genl netlink family
	577	*/
	578	void __init batadv_netlink_register(void)
	579	{
	580	int ret;
	581
33a3bb4a AQ	582	ret = genl_register_family_with_ops_groups(&batadv_netlink_family,
	583	batadv_netlink_ops,
	584	batadv_netlink_mcgrps);
09748a22 MS	585	if (ret)
	586	pr_warn("unable to register netlink family");
	587	}
	588
	589	/**
	590	* batadv_netlink_unregister - unregister batadv genl netlink family
	591	*/
	592	void batadv_netlink_unregister(void)
	593	{
	594	genl_unregister_family(&batadv_netlink_family);
	595	}