[mirror_ubuntu-zesty-kernel.git] / net / mac802154 / iface.c

/*
 * Copyright 2007-2012 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * 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.
 *
 * Written by:
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Sergey Lapin <slapin@ossfans.org>
 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 */

#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/if_arp.h>
#include <linux/ieee802154.h>

#include <net/nl802154.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/cfg802154.h>

#include "ieee802154_i.h"
#include "driver-ops.h"

int mac802154_wpan_update_llsec(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	int rc = 0;

	if (ops->llsec) {
		struct ieee802154_llsec_params params;
		int changed = 0;

		params.pan_id = wpan_dev->pan_id;
		changed |= IEEE802154_LLSEC_PARAM_PAN_ID;

		params.hwaddr = wpan_dev->extended_addr;
		changed |= IEEE802154_LLSEC_PARAM_HWADDR;

		rc = ops->llsec->set_params(dev, &params, changed);
	}

	return rc;
}

static int
mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct sockaddr_ieee802154 *sa =
		(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	int err = -ENOIOCTLCMD;

	if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR)
		return err;

	rtnl_lock();

	switch (cmd) {
	case SIOCGIFADDR:
	{
		u16 pan_id, short_addr;

		pan_id = le16_to_cpu(wpan_dev->pan_id);
		short_addr = le16_to_cpu(wpan_dev->short_addr);
		if (pan_id == IEEE802154_PANID_BROADCAST ||
		    short_addr == IEEE802154_ADDR_BROADCAST) {
			err = -EADDRNOTAVAIL;
			break;
		}

		sa->family = AF_IEEE802154;
		sa->addr.addr_type = IEEE802154_ADDR_SHORT;
		sa->addr.pan_id = pan_id;
		sa->addr.short_addr = short_addr;

		err = 0;
		break;
	}
	case SIOCSIFADDR:
		if (netif_running(dev)) {
			rtnl_unlock();
			return -EBUSY;
		}

		dev_warn(&dev->dev,
			 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
		if (sa->family != AF_IEEE802154 ||
		    sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
		    sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
		    sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
		    sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
			err = -EINVAL;
			break;
		}

		wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
		wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);

		err = mac802154_wpan_update_llsec(dev);
		break;
	}

	rtnl_unlock();
	return err;
}

static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct sockaddr *addr = p;
	__le64 extended_addr;

	if (netif_running(dev))
		return -EBUSY;

	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
	if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
		return -EINVAL;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	sdata->wpan_dev.extended_addr = extended_addr;

	return mac802154_wpan_update_llsec(dev);
}

static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata)
{
	struct ieee802154_local *local = sdata->local;
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	int ret;

	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
		ret = drv_set_promiscuous_mode(local,
					       wpan_dev->promiscuous_mode);
		if (ret < 0)
			return ret;
	}

	if (local->hw.flags & IEEE802154_HW_AFILT) {
		ret = drv_set_pan_id(local, wpan_dev->pan_id);
		if (ret < 0)
			return ret;

		ret = drv_set_extended_addr(local, wpan_dev->extended_addr);
		if (ret < 0)
			return ret;

		ret = drv_set_short_addr(local, wpan_dev->short_addr);
		if (ret < 0)
			return ret;
	}

	if (local->hw.flags & IEEE802154_HW_LBT) {
		ret = drv_set_lbt_mode(local, wpan_dev->lbt);
		if (ret < 0)
			return ret;
	}

	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
		ret = drv_set_csma_params(local, wpan_dev->min_be,
					  wpan_dev->max_be,
					  wpan_dev->csma_retries);
		if (ret < 0)
			return ret;
	}

	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
		ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static int mac802154_slave_open(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;
	int res;

	ASSERT_RTNL();

	set_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count) {
		res = ieee802154_setup_hw(sdata);
		if (res)
			goto err;

		res = drv_start(local);
		if (res)
			goto err;
	}

	local->open_count++;
	netif_start_queue(dev);
	return 0;
err:
	/* might already be clear but that doesn't matter */
	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	return res;
}

static int
ieee802154_check_mac_settings(struct ieee802154_local *local,
			      struct wpan_dev *wpan_dev,
			      struct wpan_dev *nwpan_dev)
{
	ASSERT_RTNL();

	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
		if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_AFILT) {
		if (wpan_dev->pan_id != nwpan_dev->pan_id ||
		    wpan_dev->short_addr != nwpan_dev->short_addr ||
		    wpan_dev->extended_addr != nwpan_dev->extended_addr)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
		if (wpan_dev->min_be != nwpan_dev->min_be ||
		    wpan_dev->max_be != nwpan_dev->max_be ||
		    wpan_dev->csma_retries != nwpan_dev->csma_retries)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
		if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
			return -EBUSY;
	}

	if (local->hw.flags & IEEE802154_HW_LBT) {
		if (wpan_dev->lbt != nwpan_dev->lbt)
			return -EBUSY;
	}

	return 0;
}

static int
ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
				  enum nl802154_iftype iftype)
{
	struct ieee802154_local *local = sdata->local;
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct ieee802154_sub_if_data *nsdata;

	/* we hold the RTNL here so can safely walk the list */
	list_for_each_entry(nsdata, &local->interfaces, list) {
		if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
			int ret;

			/* TODO currently we don't support multiple node types
			 * we need to run skb_clone at rx path. Check if there
			 * exist really an use case if we need to support
			 * multiple node types at the same time.
			 */
			if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
			    nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
				return -EBUSY;

			/* check all phy mac sublayer settings are the same.
			 * We have only one phy, different values makes trouble.
			 */
			ret = ieee802154_check_mac_settings(local, wpan_dev,
							    &nsdata->wpan_dev);
			if (ret < 0)
				return ret;
		}
	}

	return 0;
}

static int mac802154_wpan_open(struct net_device *dev)
{
	int rc;
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;

	rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
	if (rc < 0)
		return rc;

	return mac802154_slave_open(dev);
}

static int mac802154_slave_close(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;

	ASSERT_RTNL();

	netif_stop_queue(dev);
	local->open_count--;

	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count)
		ieee802154_stop_device(local);

	return 0;
}

static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
					 struct ieee802154_hdr *hdr,
					 const struct ieee802154_mac_cb *cb)
{
	struct ieee802154_llsec_params params;
	u8 level;

	mac802154_llsec_get_params(&sdata->sec, &params);

	if (!params.enabled && cb->secen_override && cb->secen)
		return -EINVAL;
	if (!params.enabled ||
	    (cb->secen_override && !cb->secen) ||
	    !params.out_level)
		return 0;
	if (cb->seclevel_override && !cb->seclevel)
		return -EINVAL;

	level = cb->seclevel_override ? cb->seclevel : params.out_level;

	hdr->fc.security_enabled = 1;
	hdr->sec.level = level;
	hdr->sec.key_id_mode = params.out_key.mode;
	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
		hdr->sec.short_src = params.out_key.short_source;
	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
		hdr->sec.extended_src = params.out_key.extended_source;
	hdr->sec.key_id = params.out_key.id;

	return 0;
}

static int mac802154_header_create(struct sk_buff *skb,
				   struct net_device *dev,
				   unsigned short type,
				   const void *daddr,
				   const void *saddr,
				   unsigned len)
{
	struct ieee802154_hdr hdr;
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct ieee802154_mac_cb *cb = mac_cb(skb);
	int hlen;

	if (!daddr)
		return -EINVAL;

	memset(&hdr.fc, 0, sizeof(hdr.fc));
	hdr.fc.type = cb->type;
	hdr.fc.security_enabled = cb->secen;
	hdr.fc.ack_request = cb->ackreq;
	hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;

	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
		return -EINVAL;

	if (!saddr) {
		if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
		    wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
		    wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
			hdr.source.mode = IEEE802154_ADDR_LONG;
			hdr.source.extended_addr = wpan_dev->extended_addr;
		} else {
			hdr.source.mode = IEEE802154_ADDR_SHORT;
			hdr.source.short_addr = wpan_dev->short_addr;
		}

		hdr.source.pan_id = wpan_dev->pan_id;
	} else {
		hdr.source = *(const struct ieee802154_addr *)saddr;
	}

	hdr.dest = *(const struct ieee802154_addr *)daddr;

	hlen = ieee802154_hdr_push(skb, &hdr);
	if (hlen < 0)
		return -EINVAL;

	skb_reset_mac_header(skb);
	skb->mac_len = hlen;

	if (len > ieee802154_max_payload(&hdr))
		return -EMSGSIZE;

	return hlen;
}

static int
mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
{
	struct ieee802154_hdr hdr;
	struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;

	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
		pr_debug("malformed packet\n");
		return 0;
	}

	*addr = hdr.source;
	return sizeof(*addr);
}

static struct header_ops mac802154_header_ops = {
	.create		= mac802154_header_create,
	.parse		= mac802154_header_parse,
};

static const struct net_device_ops mac802154_wpan_ops = {
	.ndo_open		= mac802154_wpan_open,
	.ndo_stop		= mac802154_slave_close,
	.ndo_start_xmit		= ieee802154_subif_start_xmit,
	.ndo_do_ioctl		= mac802154_wpan_ioctl,
	.ndo_set_mac_address	= mac802154_wpan_mac_addr,
};

static const struct net_device_ops mac802154_monitor_ops = {
	.ndo_open		= mac802154_wpan_open,
	.ndo_stop		= mac802154_slave_close,
	.ndo_start_xmit		= ieee802154_monitor_start_xmit,
};

static void mac802154_wpan_free(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	mac802154_llsec_destroy(&sdata->sec);

	free_netdev(dev);
}

static void ieee802154_if_setup(struct net_device *dev)
{
	dev->addr_len		= IEEE802154_EXTENDED_ADDR_LEN;
	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);

	dev->hard_header_len	= MAC802154_FRAME_HARD_HEADER_LEN;
	dev->needed_tailroom	= 2 + 16; /* FCS + MIC */
	dev->mtu		= IEEE802154_MTU;
	dev->tx_queue_len	= 300;
	dev->flags		= IFF_NOARP | IFF_BROADCAST;
}

static int
ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
		       enum nl802154_iftype type)
{
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	int ret;
	u8 tmp;

	/* set some type-dependent values */
	sdata->wpan_dev.iftype = type;

	get_random_bytes(&tmp, sizeof(tmp));
	atomic_set(&wpan_dev->bsn, tmp);
	get_random_bytes(&tmp, sizeof(tmp));
	atomic_set(&wpan_dev->dsn, tmp);

	/* defaults per 802.15.4-2011 */
	wpan_dev->min_be = 3;
	wpan_dev->max_be = 5;
	wpan_dev->csma_retries = 4;
	/* for compatibility, actual default is 3 */
	wpan_dev->frame_retries = -1;

	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);

	switch (type) {
	case NL802154_IFTYPE_NODE:
		ieee802154_be64_to_le64(&wpan_dev->extended_addr,
					sdata->dev->dev_addr);

		sdata->dev->header_ops = &mac802154_header_ops;
		sdata->dev->destructor = mac802154_wpan_free;
		sdata->dev->netdev_ops = &mac802154_wpan_ops;
		sdata->dev->ml_priv = &mac802154_mlme_wpan;
		wpan_dev->promiscuous_mode = false;

		mutex_init(&sdata->sec_mtx);

		mac802154_llsec_init(&sdata->sec);
		ret = mac802154_wpan_update_llsec(sdata->dev);
		if (ret < 0)
			return ret;

		break;
	case NL802154_IFTYPE_MONITOR:
		sdata->dev->destructor = free_netdev;
		sdata->dev->netdev_ops = &mac802154_monitor_ops;
		wpan_dev->promiscuous_mode = true;
		break;
	default:
		BUG();
	}

	return 0;
}

struct net_device *
ieee802154_if_add(struct ieee802154_local *local, const char *name,
		  unsigned char name_assign_type, enum nl802154_iftype type,
		  __le64 extended_addr)
{
	struct net_device *ndev = NULL;
	struct ieee802154_sub_if_data *sdata = NULL;
	int ret = -ENOMEM;

	ASSERT_RTNL();

	ndev = alloc_netdev(sizeof(*sdata), name,
			    name_assign_type, ieee802154_if_setup);
	if (!ndev)
		return ERR_PTR(-ENOMEM);

	ndev->needed_headroom = local->hw.extra_tx_headroom;

	ret = dev_alloc_name(ndev, ndev->name);
	if (ret < 0)
		goto err;

	ieee802154_le64_to_be64(ndev->perm_addr,
				&local->hw.phy->perm_extended_addr);
	switch (type) {
	case NL802154_IFTYPE_NODE:
		ndev->type = ARPHRD_IEEE802154;
		if (ieee802154_is_valid_extended_unicast_addr(extended_addr))
			ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
		else
			memcpy(ndev->dev_addr, ndev->perm_addr,
			       IEEE802154_EXTENDED_ADDR_LEN);
		break;
	case NL802154_IFTYPE_MONITOR:
		ndev->type = ARPHRD_IEEE802154_MONITOR;
		break;
	default:
		ret = -EINVAL;
		goto err;
	}

	/* TODO check this */
	SET_NETDEV_DEV(ndev, &local->phy->dev);
	sdata = netdev_priv(ndev);
	ndev->ieee802154_ptr = &sdata->wpan_dev;
	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	sdata->dev = ndev;
	sdata->wpan_dev.wpan_phy = local->hw.phy;
	sdata->local = local;

	/* setup type-dependent data */
	ret = ieee802154_setup_sdata(sdata, type);
	if (ret)
		goto err;

	ret = register_netdevice(ndev);
	if (ret < 0)
		goto err;

	mutex_lock(&local->iflist_mtx);
	list_add_tail_rcu(&sdata->list, &local->interfaces);
	mutex_unlock(&local->iflist_mtx);

	return ndev;

err:
	free_netdev(ndev);
	return ERR_PTR(ret);
}

void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
{
	ASSERT_RTNL();

	mutex_lock(&sdata->local->iflist_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->local->iflist_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

void ieee802154_remove_interfaces(struct ieee802154_local *local)
{
	struct ieee802154_sub_if_data *sdata, *tmp;

	mutex_lock(&local->iflist_mtx);
	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
		list_del(&sdata->list);

		unregister_netdevice(sdata->dev);
	}
	mutex_unlock(&local->iflist_mtx);
}

static int netdev_notify(struct notifier_block *nb,
			 unsigned long state, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct ieee802154_sub_if_data *sdata;

	if (state != NETDEV_CHANGENAME)
		return NOTIFY_DONE;

	if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
		return NOTIFY_DONE;

	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
		return NOTIFY_DONE;

	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	memcpy(sdata->name, dev->name, IFNAMSIZ);

	return NOTIFY_OK;
}

static struct notifier_block mac802154_netdev_notifier = {
	.notifier_call = netdev_notify,
};

int ieee802154_iface_init(void)
{
	return register_netdevice_notifier(&mac802154_netdev_notifier);
}

void ieee802154_iface_exit(void)
{
	unregister_netdevice_notifier(&mac802154_netdev_notifier);
}
Commit	Line	Data
32bad7e3	1	/*
	2	* Copyright 2007-2012 Siemens AG
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
32bad7e3	13	* Written by:
	14	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	15	* Sergey Lapin <slapin@ossfans.org>
	16	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	17	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	18	*/
	19
	20	#include <linux/netdevice.h>
	21	#include <linux/module.h>
	22	#include <linux/if_arp.h>
4ca24aca	23	#include <linux/ieee802154.h>
32bad7e3	24
944742a3	25	#include <net/nl802154.h>
32bad7e3	26	#include <net/mac802154.h>
32bad7e3	27	#include <net/ieee802154_netdev.h>
5ad60d36	28	#include <net/cfg802154.h>
32bad7e3	29
0f1556bc	30	#include "ieee802154_i.h"
59cb300f	31	#include "driver-ops.h"
32bad7e3	32
d77b4852	33	int mac802154_wpan_update_llsec(struct net_device *dev)
9b0bb4a8	34	{
59d19cd7	35	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
9b0bb4a8	36	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
863e88f2	37	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
9b0bb4a8 PB	38	int rc = 0;
	39
	40	if (ops->llsec) {
	41	struct ieee802154_llsec_params params;
	42	int changed = 0;
	43
863e88f2	44	params.pan_id = wpan_dev->pan_id;
9b0bb4a8 PB	45	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
9b0bb4a8 PB	46
863e88f2	47	params.hwaddr = wpan_dev->extended_addr;
9b0bb4a8 PB	48	changed \|= IEEE802154_LLSEC_PARAM_HWADDR;
	49
	50	rc = ops->llsec->set_params(dev, &params, changed);
	51	}
	52
	53	return rc;
	54	}
	55
32bad7e3	56	static int
	57	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	58	{
59d19cd7	59	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	60	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32bad7e3	61	struct sockaddr_ieee802154 *sa =
	62	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	63	int err = -ENOIOCTLCMD;
	64
e34fd879 LB	65	if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR)
	66	return err;
	67
4a669f7d	68	rtnl_lock();
32bad7e3	69
	70	switch (cmd) {
	71	case SIOCGIFADDR:
b70ab2e8 PB	72	{
	73	u16 pan_id, short_addr;
	74
863e88f2 AA	75	pan_id = le16_to_cpu(wpan_dev->pan_id);
863e88f2 AA	76	short_addr = le16_to_cpu(wpan_dev->short_addr);
b70ab2e8 PB	77	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
b70ab2e8 PB	78	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	79	err = -EADDRNOTAVAIL;
	80	break;
	81	}
	82
	83	sa->family = AF_IEEE802154;
	84	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	85	sa->addr.pan_id = pan_id;
b70ab2e8 PB	86	sa->addr.short_addr = short_addr;
32bad7e3	87
	88	err = 0;
	89	break;
b70ab2e8	90	}
32bad7e3	91	case SIOCSIFADDR:
f7cb96f1	92	if (netif_running(dev)) {
4a669f7d	93	rtnl_unlock();
f7cb96f1 AA	94	return -EBUSY;
	95	}
	96
32bad7e3	97	dev_warn(&dev->dev,
9b13494c	98	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
32bad7e3	99	if (sa->family != AF_IEEE802154 \|\|
	100	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	101	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	102	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	103	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	104	err = -EINVAL;
	105	break;
	106	}
	107
863e88f2 AA	108	wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
863e88f2 AA	109	wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	110
9b0bb4a8	111	err = mac802154_wpan_update_llsec(dev);
32bad7e3	112	break;
	113	}
	114
4a669f7d	115	rtnl_unlock();
32bad7e3	116	return err;
	117	}
	118
	119	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	120	{
776e59de	121	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	122	struct sockaddr *addr = p;
ea7053c1	123	__le64 extended_addr;
32bad7e3	124
	125	if (netif_running(dev))
	126	return -EBUSY;
	127
705cbbbe	128	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
daf4e2c8	129	if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
ea7053c1 AA	130	return -EINVAL;
ea7053c1 AA	131
32bad7e3	132	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
863e88f2	133	sdata->wpan_dev.extended_addr = extended_addr;
776e59de	134
9b0bb4a8	135	return mac802154_wpan_update_llsec(dev);
32bad7e3	136	}
32bad7e3	137
95c0aa15 AA	138	static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata)
	139	{
	140	struct ieee802154_local *local = sdata->local;
	141	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	142	int ret;
	143
	144	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
	145	ret = drv_set_promiscuous_mode(local,
	146	wpan_dev->promiscuous_mode);
	147	if (ret < 0)
	148	return ret;
	149	}
	150
	151	if (local->hw.flags & IEEE802154_HW_AFILT) {
	152	ret = drv_set_pan_id(local, wpan_dev->pan_id);
	153	if (ret < 0)
	154	return ret;
	155
	156	ret = drv_set_extended_addr(local, wpan_dev->extended_addr);
	157	if (ret < 0)
	158	return ret;
	159
	160	ret = drv_set_short_addr(local, wpan_dev->short_addr);
	161	if (ret < 0)
	162	return ret;
	163	}
	164
	165	if (local->hw.flags & IEEE802154_HW_LBT) {
	166	ret = drv_set_lbt_mode(local, wpan_dev->lbt);
	167	if (ret < 0)
	168	return ret;
	169	}
	170
	171	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
	172	ret = drv_set_csma_params(local, wpan_dev->min_be,
	173	wpan_dev->max_be,
	174	wpan_dev->csma_retries);
	175	if (ret < 0)
	176	return ret;
	177	}
	178
	179	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
	180	ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
	181	if (ret < 0)
	182	return ret;
	183	}
	184
	185	return 0;
	186	}
	187
19ec690a AA	188	static int mac802154_slave_open(struct net_device *dev)
	189	{
	190	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
19ec690a	191	struct ieee802154_local *local = sdata->local;
5c698e8b	192	int res;
19ec690a AA	193
	194	ASSERT_RTNL();
	195
0ea3da64	196	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	197
74457641	198	if (!local->open_count) {
95c0aa15 AA	199	res = ieee802154_setup_hw(sdata);
	200	if (res)
	201	goto err;
	202
59cb300f	203	res = drv_start(local);
19ec690a AA	204	if (res)
	205	goto err;
	206	}
	207
74457641	208	local->open_count++;
19ec690a AA	209	netif_start_queue(dev);
	210	return 0;
	211	err:
0ea3da64 AA	212	/* might already be clear but that doesn't matter */
0ea3da64 AA	213	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	214
	215	return res;
	216	}
	217
bd37a78d AA	218	static int
	219	ieee802154_check_mac_settings(struct ieee802154_local *local,
	220	struct wpan_dev *wpan_dev,
	221	struct wpan_dev *nwpan_dev)
	222	{
	223	ASSERT_RTNL();
	224
	225	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
	226	if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
	227	return -EBUSY;
	228	}
	229
	230	if (local->hw.flags & IEEE802154_HW_AFILT) {
8bf9538a AA	231	if (wpan_dev->pan_id != nwpan_dev->pan_id \|\|
	232	wpan_dev->short_addr != nwpan_dev->short_addr \|\|
	233	wpan_dev->extended_addr != nwpan_dev->extended_addr)
bd37a78d AA	234	return -EBUSY;
	235	}
	236
	237	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
8bf9538a AA	238	if (wpan_dev->min_be != nwpan_dev->min_be \|\|
	239	wpan_dev->max_be != nwpan_dev->max_be \|\|
	240	wpan_dev->csma_retries != nwpan_dev->csma_retries)
bd37a78d AA	241	return -EBUSY;
	242	}
	243
	244	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
	245	if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
	246	return -EBUSY;
	247	}
	248
	249	if (local->hw.flags & IEEE802154_HW_LBT) {
	250	if (wpan_dev->lbt != nwpan_dev->lbt)
	251	return -EBUSY;
	252	}
	253
	254	return 0;
	255	}
	256
	257	static int
	258	ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
	259	enum nl802154_iftype iftype)
	260	{
	261	struct ieee802154_local *local = sdata->local;
	262	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	263	struct ieee802154_sub_if_data *nsdata;
	264
	265	/* we hold the RTNL here so can safely walk the list */
	266	list_for_each_entry(nsdata, &local->interfaces, list) {
	267	if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
	268	int ret;
	269
cd1c5665 AA	270	/* TODO currently we don't support multiple node types
	271	* we need to run skb_clone at rx path. Check if there
	272	* exist really an use case if we need to support
	273	* multiple node types at the same time.
	274	*/
ed65963b AA	275	if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
ed65963b AA	276	nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
cd1c5665 AA	277	return -EBUSY;
cd1c5665 AA	278
bd37a78d AA	279	/* check all phy mac sublayer settings are the same.
	280	* We have only one phy, different values makes trouble.
	281	*/
	282	ret = ieee802154_check_mac_settings(local, wpan_dev,
	283	&nsdata->wpan_dev);
	284	if (ret < 0)
	285	return ret;
	286	}
	287	}
	288
	289	return 0;
	290	}
	291
6ef0023a	292	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	293	{
e462ded6 PB	294	int rc;
59d19cd7	295	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	296	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
e462ded6	297
ed65963b	298	rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
bd37a78d AA	299	if (rc < 0)
	300	return rc;
	301
95c0aa15	302	return mac802154_slave_open(dev);
e462ded6 PB	303	}
e462ded6 PB	304
19ec690a AA	305	static int mac802154_slave_close(struct net_device *dev)
	306	{
	307	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	308	struct ieee802154_local *local = sdata->local;
	309
	310	ASSERT_RTNL();
	311
	312	netif_stop_queue(dev);
74457641	313	local->open_count--;
19ec690a	314
0ea3da64	315	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	316
c4227c8a AA	317	if (!local->open_count)
c4227c8a AA	318	ieee802154_stop_device(local);
19ec690a AA	319
	320	return 0;
	321	}
	322
036562f9	323	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	324	struct ieee802154_hdr *hdr,
	325	const struct ieee802154_mac_cb *cb)
	326	{
	327	struct ieee802154_llsec_params params;
	328	u8 level;
	329
036562f9	330	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	331
	332	if (!params.enabled && cb->secen_override && cb->secen)
	333	return -EINVAL;
	334	if (!params.enabled \|\|
	335	(cb->secen_override && !cb->secen) \|\|
	336	!params.out_level)
	337	return 0;
	338	if (cb->seclevel_override && !cb->seclevel)
	339	return -EINVAL;
	340
	341	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	342
	343	hdr->fc.security_enabled = 1;
	344	hdr->sec.level = level;
	345	hdr->sec.key_id_mode = params.out_key.mode;
	346	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	347	hdr->sec.short_src = params.out_key.short_source;
	348	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	349	hdr->sec.extended_src = params.out_key.extended_source;
	350	hdr->sec.key_id = params.out_key.id;
	351
	352	return 0;
	353	}
	354
32bad7e3	355	static int mac802154_header_create(struct sk_buff *skb,
	356	struct net_device *dev,
	357	unsigned short type,
e6278d92 PB	358	const void *daddr,
e6278d92 PB	359	const void *saddr,
32bad7e3	360	unsigned len)
32bad7e3	361	{
e6278d92	362	struct ieee802154_hdr hdr;
59d19cd7	363	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	364	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32edc40a	365	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	366	int hlen;
32bad7e3	367
	368	if (!daddr)
	369	return -EINVAL;
	370
e6278d92	371	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	372	hdr.fc.type = cb->type;
	373	hdr.fc.security_enabled = cb->secen;
	374	hdr.fc.ack_request = cb->ackreq;
344f8c11	375	hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
32bad7e3	376
036562f9	377	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	378	return -EINVAL;
f30be4d5 PB	379
32bad7e3	380	if (!saddr) {
863e88f2 AA	381	if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	382	wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	383	wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	384	hdr.source.mode = IEEE802154_ADDR_LONG;
863e88f2	385	hdr.source.extended_addr = wpan_dev->extended_addr;
32bad7e3	386	} else {
e6278d92	387	hdr.source.mode = IEEE802154_ADDR_SHORT;
863e88f2	388	hdr.source.short_addr = wpan_dev->short_addr;
32bad7e3	389	}
32bad7e3	390
863e88f2	391	hdr.source.pan_id = wpan_dev->pan_id;
e6278d92 PB	392	} else {
e6278d92 PB	393	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	394	}
32bad7e3	395
e6278d92	396	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	397
e6278d92 PB	398	hlen = ieee802154_hdr_push(skb, &hdr);
	399	if (hlen < 0)
	400	return -EINVAL;
32bad7e3	401
3e69162e	402	skb_reset_mac_header(skb);
e6278d92	403	skb->mac_len = hlen;
32bad7e3	404
8c84296f	405	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	406	return -EMSGSIZE;
d1d7358e PB	407
e6278d92	408	return hlen;
32bad7e3	409	}
	410
	411	static int
	412	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	413	{
e6278d92 PB	414	struct ieee802154_hdr hdr;
e6278d92 PB	415	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	416
e6278d92 PB	417	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	418	pr_debug("malformed packet\n");
	419	return 0;
32bad7e3	420	}
32bad7e3	421
e6278d92 PB	422	*addr = hdr.source;
e6278d92 PB	423	return sizeof(*addr);
32bad7e3	424	}
32bad7e3	425
32bad7e3	426	static struct header_ops mac802154_header_ops = {
	427	.create = mac802154_header_create,
	428	.parse = mac802154_header_parse,
	429	};
	430
	431	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	432	.ndo_open = mac802154_wpan_open,
32bad7e3	433	.ndo_stop = mac802154_slave_close,
e5e584fc	434	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	435	.ndo_do_ioctl = mac802154_wpan_ioctl,
	436	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	437	};
	438
b9ff77e5	439	static const struct net_device_ops mac802154_monitor_ops = {
38130c31	440	.ndo_open = mac802154_wpan_open,
b9ff77e5 AA	441	.ndo_stop = mac802154_slave_close,
	442	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	443	};
	444
f30be4d5 PB	445	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	446	{
59d19cd7	447	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	448
036562f9	449	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	450
	451	free_netdev(dev);
	452	}
	453
d5ae67ba	454	static void ieee802154_if_setup(struct net_device *dev)
32bad7e3	455	{
e57a8946 AA	456	dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
e57a8946 AA	457	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
32bad7e3	458
32bad7e3	459	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
f30be4d5	460	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	461	dev->mtu = IEEE802154_MTU;
e937f583	462	dev->tx_queue_len = 300;
32bad7e3	463	dev->flags = IFF_NOARP \| IFF_BROADCAST;
d5ae67ba	464	}
32bad7e3	465
d5ae67ba	466	static int
944742a3 AA	467	ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
944742a3 AA	468	enum nl802154_iftype type)
d5ae67ba	469	{
863e88f2	470	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
d77b4852	471	int ret;
344f8c11	472	u8 tmp;
863e88f2	473
d5ae67ba	474	/* set some type-dependent values */
190ac1ca	475	sdata->wpan_dev.iftype = type;
32bad7e3	476
344f8c11 AA	477	get_random_bytes(&tmp, sizeof(tmp));
	478	atomic_set(&wpan_dev->bsn, tmp);
	479	get_random_bytes(&tmp, sizeof(tmp));
	480	atomic_set(&wpan_dev->dsn, tmp);
32bad7e3	481
e462ded6	482	/* defaults per 802.15.4-2011 */
5fb3f026 AA	483	wpan_dev->min_be = 3;
	484	wpan_dev->max_be = 5;
	485	wpan_dev->csma_retries = 4;
036562f9	486	/* for compatibility, actual default is 3 */
5fb3f026	487	wpan_dev->frame_retries = -1;
e462ded6	488
863e88f2 AA	489	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
863e88f2 AA	490	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	491
d5ae67ba	492	switch (type) {
944742a3	493	case NL802154_IFTYPE_NODE:
b03c9ccc AA	494	ieee802154_be64_to_le64(&wpan_dev->extended_addr,
	495	sdata->dev->dev_addr);
	496
d5ae67ba AA	497	sdata->dev->header_ops = &mac802154_header_ops;
	498	sdata->dev->destructor = mac802154_wpan_free;
	499	sdata->dev->netdev_ops = &mac802154_wpan_ops;
	500	sdata->dev->ml_priv = &mac802154_mlme_wpan;
863e88f2	501	wpan_dev->promiscuous_mode = false;
986a8abf	502
d5ae67ba	503	mutex_init(&sdata->sec_mtx);
986a8abf	504
d5ae67ba	505	mac802154_llsec_init(&sdata->sec);
d77b4852 AA	506	ret = mac802154_wpan_update_llsec(sdata->dev);
	507	if (ret < 0)
	508	return ret;
	509
d5ae67ba	510	break;
944742a3	511	case NL802154_IFTYPE_MONITOR:
d5ae67ba AA	512	sdata->dev->destructor = free_netdev;
d5ae67ba AA	513	sdata->dev->netdev_ops = &mac802154_monitor_ops;
863e88f2	514	wpan_dev->promiscuous_mode = true;
d5ae67ba AA	515	break;
	516	default:
	517	BUG();
	518	}
986a8abf AA	519
	520	return 0;
	521	}
	522
	523	struct net_device *
	524	ieee802154_if_add(struct ieee802154_local local, const char name,
5b4a1039 VB	525	unsigned char name_assign_type, enum nl802154_iftype type,
5b4a1039 VB	526	__le64 extended_addr)
986a8abf	527	{
d5ae67ba AA	528	struct net_device *ndev = NULL;
	529	struct ieee802154_sub_if_data *sdata = NULL;
	530	int ret = -ENOMEM;
	531
	532	ASSERT_RTNL();
	533
ed65963b	534	ndev = alloc_netdev(sizeof(*sdata), name,
5b4a1039	535	name_assign_type, ieee802154_if_setup);
d5ae67ba AA	536	if (!ndev)
	537	return ERR_PTR(-ENOMEM);
	538
	539	ndev->needed_headroom = local->hw.extra_tx_headroom;
	540
	541	ret = dev_alloc_name(ndev, ndev->name);
	542	if (ret < 0)
	543	goto err;
986a8abf	544
0e57547e AA	545	ieee802154_le64_to_be64(ndev->perm_addr,
0e57547e AA	546	&local->hw.phy->perm_extended_addr);
986a8abf	547	switch (type) {
944742a3	548	case NL802154_IFTYPE_NODE:
d5ae67ba	549	ndev->type = ARPHRD_IEEE802154;
daf4e2c8	550	if (ieee802154_is_valid_extended_unicast_addr(extended_addr))
0e57547e AA	551	ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
	552	else
	553	memcpy(ndev->dev_addr, ndev->perm_addr,
	554	IEEE802154_EXTENDED_ADDR_LEN);
986a8abf	555	break;
944742a3	556	case NL802154_IFTYPE_MONITOR:
d5ae67ba	557	ndev->type = ARPHRD_IEEE802154_MONITOR;
986a8abf	558	break;
d5ae67ba AA	559	default:
	560	ret = -EINVAL;
	561	goto err;
986a8abf	562	}
d5ae67ba AA	563
	564	/* TODO check this */
	565	SET_NETDEV_DEV(ndev, &local->phy->dev);
	566	sdata = netdev_priv(ndev);
	567	ndev->ieee802154_ptr = &sdata->wpan_dev;
	568	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	569	sdata->dev = ndev;
	570	sdata->wpan_dev.wpan_phy = local->hw.phy;
	571	sdata->local = local;
	572
	573	/* setup type-dependent data */
	574	ret = ieee802154_setup_sdata(sdata, type);
	575	if (ret)
986a8abf AA	576	goto err;
986a8abf AA	577
473f3766 VB	578	ret = register_netdevice(ndev);
	579	if (ret < 0)
	580	goto err;
d5ae67ba AA	581
	582	mutex_lock(&local->iflist_mtx);
	583	list_add_tail_rcu(&sdata->list, &local->interfaces);
	584	mutex_unlock(&local->iflist_mtx);
986a8abf	585
d5ae67ba	586	return ndev;
986a8abf	587
986a8abf	588	err:
d5ae67ba AA	589	free_netdev(ndev);
d5ae67ba AA	590	return ERR_PTR(ret);
986a8abf AA	591	}
986a8abf AA	592
b210b187 AA	593	void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
	594	{
	595	ASSERT_RTNL();
	596
	597	mutex_lock(&sdata->local->iflist_mtx);
	598	list_del_rcu(&sdata->list);
	599	mutex_unlock(&sdata->local->iflist_mtx);
	600
	601	synchronize_rcu();
	602	unregister_netdevice(sdata->dev);
	603	}
592dfbfc AA	604
	605	void ieee802154_remove_interfaces(struct ieee802154_local *local)
	606	{
d14e1c71	607	struct ieee802154_sub_if_data sdata, tmp;
592dfbfc	608
2789e629	609	mutex_lock(&local->iflist_mtx);
d14e1c71	610	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
592dfbfc	611	list_del(&sdata->list);
592dfbfc AA	612
	613	unregister_netdevice(sdata->dev);
	614	}
2789e629	615	mutex_unlock(&local->iflist_mtx);
592dfbfc	616	}
be4fd8e5 AA	617
	618	static int netdev_notify(struct notifier_block *nb,
	619	unsigned long state, void *ptr)
	620	{
	621	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	622	struct ieee802154_sub_if_data *sdata;
	623
	624	if (state != NETDEV_CHANGENAME)
	625	return NOTIFY_DONE;
	626
	627	if (!dev->ieee802154_ptr \|\| !dev->ieee802154_ptr->wpan_phy)
	628	return NOTIFY_DONE;
	629
	630	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
	631	return NOTIFY_DONE;
	632
	633	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	634	memcpy(sdata->name, dev->name, IFNAMSIZ);
	635
	636	return NOTIFY_OK;
	637	}
	638
	639	static struct notifier_block mac802154_netdev_notifier = {
	640	.notifier_call = netdev_notify,
	641	};
	642
	643	int ieee802154_iface_init(void)
	644	{
	645	return register_netdevice_notifier(&mac802154_netdev_notifier);
	646	}
	647
	648	void ieee802154_iface_exit(void)
	649	{
	650	unregister_netdevice_notifier(&mac802154_netdev_notifier);
	651	}