[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"

static 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;

	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_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 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 = 0;

	ASSERT_RTNL();

	set_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count) {
		res = drv_start(local);
		WARN_ON(res);
		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 (sdata->vif.type == NL802154_IFTYPE_NODE &&
			    nsdata->vif.type == 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 ieee802154_local *local = sdata->local;
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;

	rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
	if (rc < 0)
		return rc;

	rc = mac802154_slave_open(dev);
	if (rc < 0)
		return rc;

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

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

		rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
		if (rc < 0)
			goto out;

		rc = drv_set_short_addr(local, wpan_dev->short_addr);
		if (rc < 0)
			goto out;
	}

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

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

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

out:
	return rc;
}

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();

	hrtimer_cancel(&local->ifs_timer);

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

	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count)
		drv_stop(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;
	u8 tmp;

	/* set some type-dependent values */
	sdata->vif.type = type;
	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);
		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) + local->hw.vif_data_size, 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_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
9b0bb4a8 PB	33	static int mac802154_wpan_update_llsec(struct net_device *dev)
9b0bb4a8 PB	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
4a669f7d	65	rtnl_lock();
32bad7e3	66
	67	switch (cmd) {
	68	case SIOCGIFADDR:
b70ab2e8 PB	69	{
	70	u16 pan_id, short_addr;
	71
863e88f2 AA	72	pan_id = le16_to_cpu(wpan_dev->pan_id);
863e88f2 AA	73	short_addr = le16_to_cpu(wpan_dev->short_addr);
b70ab2e8 PB	74	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
b70ab2e8 PB	75	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	76	err = -EADDRNOTAVAIL;
	77	break;
	78	}
	79
	80	sa->family = AF_IEEE802154;
	81	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	82	sa->addr.pan_id = pan_id;
b70ab2e8 PB	83	sa->addr.short_addr = short_addr;
32bad7e3	84
	85	err = 0;
	86	break;
b70ab2e8	87	}
32bad7e3	88	case SIOCSIFADDR:
f7cb96f1	89	if (netif_running(dev)) {
4a669f7d	90	rtnl_unlock();
f7cb96f1 AA	91	return -EBUSY;
	92	}
	93
32bad7e3	94	dev_warn(&dev->dev,
9b13494c	95	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
32bad7e3	96	if (sa->family != AF_IEEE802154 \|\|
	97	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	98	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	99	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	100	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	101	err = -EINVAL;
	102	break;
	103	}
	104
863e88f2 AA	105	wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
863e88f2 AA	106	wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	107
9b0bb4a8	108	err = mac802154_wpan_update_llsec(dev);
32bad7e3	109	break;
	110	}
	111
4a669f7d	112	rtnl_unlock();
32bad7e3	113	return err;
	114	}
	115
	116	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	117	{
776e59de	118	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	119	struct sockaddr *addr = p;
ea7053c1	120	__le64 extended_addr;
32bad7e3	121
	122	if (netif_running(dev))
	123	return -EBUSY;
	124
705cbbbe	125	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
ea7053c1 AA	126	if (!ieee802154_is_valid_extended_addr(extended_addr))
	127	return -EINVAL;
	128
32bad7e3	129	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
863e88f2	130	sdata->wpan_dev.extended_addr = extended_addr;
776e59de	131
9b0bb4a8	132	return mac802154_wpan_update_llsec(dev);
32bad7e3	133	}
32bad7e3	134
19ec690a AA	135	static int mac802154_slave_open(struct net_device *dev)
	136	{
	137	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
19ec690a AA	138	struct ieee802154_local *local = sdata->local;
	139	int res = 0;
	140
	141	ASSERT_RTNL();
	142
0ea3da64	143	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	144
74457641	145	if (!local->open_count) {
59cb300f	146	res = drv_start(local);
19ec690a AA	147	WARN_ON(res);
	148	if (res)
	149	goto err;
	150	}
	151
74457641	152	local->open_count++;
19ec690a AA	153	netif_start_queue(dev);
	154	return 0;
	155	err:
0ea3da64 AA	156	/* might already be clear but that doesn't matter */
0ea3da64 AA	157	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	158
	159	return res;
	160	}
	161
bd37a78d AA	162	static int
	163	ieee802154_check_mac_settings(struct ieee802154_local *local,
	164	struct wpan_dev *wpan_dev,
	165	struct wpan_dev *nwpan_dev)
	166	{
	167	ASSERT_RTNL();
	168
	169	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
	170	if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
	171	return -EBUSY;
	172	}
	173
	174	if (local->hw.flags & IEEE802154_HW_AFILT) {
8bf9538a AA	175	if (wpan_dev->pan_id != nwpan_dev->pan_id \|\|
	176	wpan_dev->short_addr != nwpan_dev->short_addr \|\|
	177	wpan_dev->extended_addr != nwpan_dev->extended_addr)
bd37a78d AA	178	return -EBUSY;
	179	}
	180
	181	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
8bf9538a AA	182	if (wpan_dev->min_be != nwpan_dev->min_be \|\|
	183	wpan_dev->max_be != nwpan_dev->max_be \|\|
	184	wpan_dev->csma_retries != nwpan_dev->csma_retries)
bd37a78d AA	185	return -EBUSY;
	186	}
	187
	188	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
	189	if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
	190	return -EBUSY;
	191	}
	192
	193	if (local->hw.flags & IEEE802154_HW_LBT) {
	194	if (wpan_dev->lbt != nwpan_dev->lbt)
	195	return -EBUSY;
	196	}
	197
	198	return 0;
	199	}
	200
	201	static int
	202	ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
	203	enum nl802154_iftype iftype)
	204	{
	205	struct ieee802154_local *local = sdata->local;
	206	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	207	struct ieee802154_sub_if_data *nsdata;
	208
	209	/* we hold the RTNL here so can safely walk the list */
	210	list_for_each_entry(nsdata, &local->interfaces, list) {
	211	if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
	212	int ret;
	213
cd1c5665 AA	214	/* TODO currently we don't support multiple node types
	215	* we need to run skb_clone at rx path. Check if there
	216	* exist really an use case if we need to support
	217	* multiple node types at the same time.
	218	*/
	219	if (sdata->vif.type == NL802154_IFTYPE_NODE &&
	220	nsdata->vif.type == NL802154_IFTYPE_NODE)
	221	return -EBUSY;
	222
bd37a78d AA	223	/* check all phy mac sublayer settings are the same.
	224	* We have only one phy, different values makes trouble.
	225	*/
	226	ret = ieee802154_check_mac_settings(local, wpan_dev,
	227	&nsdata->wpan_dev);
	228	if (ret < 0)
	229	return ret;
	230	}
	231	}
	232
	233	return 0;
	234	}
	235
6ef0023a	236	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	237	{
e462ded6 PB	238	int rc;
59d19cd7	239	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
59cb300f	240	struct ieee802154_local *local = sdata->local;
863e88f2	241	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
e462ded6	242
bd37a78d AA	243	rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
	244	if (rc < 0)
	245	return rc;
	246
e462ded6 PB	247	rc = mac802154_slave_open(dev);
	248	if (rc < 0)
	249	return rc;
	250
38130c31	251	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
863e88f2 AA	252	rc = drv_set_promiscuous_mode(local,
863e88f2 AA	253	wpan_dev->promiscuous_mode);
38130c31 AA	254	if (rc < 0)
	255	goto out;
	256	}
	257
776e59de	258	if (local->hw.flags & IEEE802154_HW_AFILT) {
863e88f2	259	rc = drv_set_pan_id(local, wpan_dev->pan_id);
50c79075 AA	260	if (rc < 0)
	261	goto out;
	262
863e88f2	263	rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
776e59de AA	264	if (rc < 0)
776e59de AA	265	goto out;
78b4bad1	266
863e88f2	267	rc = drv_set_short_addr(local, wpan_dev->short_addr);
78b4bad1 AA	268	if (rc < 0)
78b4bad1 AA	269	goto out;
776e59de AA	270	}
776e59de AA	271
a543c598	272	if (local->hw.flags & IEEE802154_HW_LBT) {
5fb3f026	273	rc = drv_set_lbt_mode(local, wpan_dev->lbt);
e462ded6 PB	274	if (rc < 0)
	275	goto out;
	276	}
	277
a543c598	278	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
5fb3f026 AA	279	rc = drv_set_csma_params(local, wpan_dev->min_be,
	280	wpan_dev->max_be,
	281	wpan_dev->csma_retries);
e462ded6 PB	282	if (rc < 0)
	283	goto out;
	284	}
	285
a543c598	286	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
5fb3f026	287	rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
e462ded6 PB	288	if (rc < 0)
	289	goto out;
	290	}
	291
e462ded6	292	out:
e462ded6 PB	293	return rc;
	294	}
	295
19ec690a AA	296	static int mac802154_slave_close(struct net_device *dev)
	297	{
	298	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	299	struct ieee802154_local *local = sdata->local;
	300
	301	ASSERT_RTNL();
	302
61f2dcba AA	303	hrtimer_cancel(&local->ifs_timer);
61f2dcba AA	304
19ec690a	305	netif_stop_queue(dev);
74457641	306	local->open_count--;
19ec690a	307
0ea3da64	308	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	309
74457641	310	if (!local->open_count)
59cb300f	311	drv_stop(local);
19ec690a AA	312
	313	return 0;
	314	}
	315
036562f9	316	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	317	struct ieee802154_hdr *hdr,
	318	const struct ieee802154_mac_cb *cb)
	319	{
	320	struct ieee802154_llsec_params params;
	321	u8 level;
	322
036562f9	323	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	324
	325	if (!params.enabled && cb->secen_override && cb->secen)
	326	return -EINVAL;
	327	if (!params.enabled \|\|
	328	(cb->secen_override && !cb->secen) \|\|
	329	!params.out_level)
	330	return 0;
	331	if (cb->seclevel_override && !cb->seclevel)
	332	return -EINVAL;
	333
	334	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	335
	336	hdr->fc.security_enabled = 1;
	337	hdr->sec.level = level;
	338	hdr->sec.key_id_mode = params.out_key.mode;
	339	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	340	hdr->sec.short_src = params.out_key.short_source;
	341	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	342	hdr->sec.extended_src = params.out_key.extended_source;
	343	hdr->sec.key_id = params.out_key.id;
	344
	345	return 0;
	346	}
	347
32bad7e3	348	static int mac802154_header_create(struct sk_buff *skb,
	349	struct net_device *dev,
	350	unsigned short type,
e6278d92 PB	351	const void *daddr,
e6278d92 PB	352	const void *saddr,
32bad7e3	353	unsigned len)
32bad7e3	354	{
e6278d92	355	struct ieee802154_hdr hdr;
59d19cd7	356	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	357	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32edc40a	358	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	359	int hlen;
32bad7e3	360
	361	if (!daddr)
	362	return -EINVAL;
	363
e6278d92	364	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	365	hdr.fc.type = cb->type;
	366	hdr.fc.security_enabled = cb->secen;
	367	hdr.fc.ack_request = cb->ackreq;
344f8c11	368	hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
32bad7e3	369
036562f9	370	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	371	return -EINVAL;
f30be4d5 PB	372
32bad7e3	373	if (!saddr) {
863e88f2 AA	374	if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	375	wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	376	wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	377	hdr.source.mode = IEEE802154_ADDR_LONG;
863e88f2	378	hdr.source.extended_addr = wpan_dev->extended_addr;
32bad7e3	379	} else {
e6278d92	380	hdr.source.mode = IEEE802154_ADDR_SHORT;
863e88f2	381	hdr.source.short_addr = wpan_dev->short_addr;
32bad7e3	382	}
32bad7e3	383
863e88f2	384	hdr.source.pan_id = wpan_dev->pan_id;
e6278d92 PB	385	} else {
e6278d92 PB	386	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	387	}
32bad7e3	388
e6278d92	389	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	390
e6278d92 PB	391	hlen = ieee802154_hdr_push(skb, &hdr);
	392	if (hlen < 0)
	393	return -EINVAL;
32bad7e3	394
3e69162e	395	skb_reset_mac_header(skb);
e6278d92	396	skb->mac_len = hlen;
32bad7e3	397
8c84296f	398	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	399	return -EMSGSIZE;
d1d7358e PB	400
e6278d92	401	return hlen;
32bad7e3	402	}
	403
	404	static int
	405	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	406	{
e6278d92 PB	407	struct ieee802154_hdr hdr;
e6278d92 PB	408	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	409
e6278d92 PB	410	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	411	pr_debug("malformed packet\n");
	412	return 0;
32bad7e3	413	}
32bad7e3	414
e6278d92 PB	415	*addr = hdr.source;
e6278d92 PB	416	return sizeof(*addr);
32bad7e3	417	}
32bad7e3	418
32bad7e3	419	static struct header_ops mac802154_header_ops = {
	420	.create = mac802154_header_create,
	421	.parse = mac802154_header_parse,
	422	};
	423
	424	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	425	.ndo_open = mac802154_wpan_open,
32bad7e3	426	.ndo_stop = mac802154_slave_close,
e5e584fc	427	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	428	.ndo_do_ioctl = mac802154_wpan_ioctl,
	429	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	430	};
	431
b9ff77e5	432	static const struct net_device_ops mac802154_monitor_ops = {
38130c31	433	.ndo_open = mac802154_wpan_open,
b9ff77e5 AA	434	.ndo_stop = mac802154_slave_close,
	435	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	436	};
	437
f30be4d5 PB	438	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	439	{
59d19cd7	440	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	441
036562f9	442	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	443
	444	free_netdev(dev);
	445	}
	446
d5ae67ba	447	static void ieee802154_if_setup(struct net_device *dev)
32bad7e3	448	{
e57a8946 AA	449	dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
e57a8946 AA	450	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
32bad7e3	451
32bad7e3	452	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
f30be4d5	453	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	454	dev->mtu = IEEE802154_MTU;
e937f583	455	dev->tx_queue_len = 300;
32bad7e3	456	dev->flags = IFF_NOARP \| IFF_BROADCAST;
d5ae67ba	457	}
32bad7e3	458
d5ae67ba	459	static int
944742a3 AA	460	ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
944742a3 AA	461	enum nl802154_iftype type)
d5ae67ba	462	{
863e88f2	463	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
344f8c11	464	u8 tmp;
863e88f2	465
d5ae67ba	466	/* set some type-dependent values */
7c118c1a	467	sdata->vif.type = type;
190ac1ca	468	sdata->wpan_dev.iftype = type;
32bad7e3	469
344f8c11 AA	470	get_random_bytes(&tmp, sizeof(tmp));
	471	atomic_set(&wpan_dev->bsn, tmp);
	472	get_random_bytes(&tmp, sizeof(tmp));
	473	atomic_set(&wpan_dev->dsn, tmp);
32bad7e3	474
e462ded6	475	/* defaults per 802.15.4-2011 */
5fb3f026 AA	476	wpan_dev->min_be = 3;
	477	wpan_dev->max_be = 5;
	478	wpan_dev->csma_retries = 4;
036562f9	479	/* for compatibility, actual default is 3 */
5fb3f026	480	wpan_dev->frame_retries = -1;
e462ded6	481
863e88f2 AA	482	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
863e88f2 AA	483	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	484
d5ae67ba	485	switch (type) {
944742a3	486	case NL802154_IFTYPE_NODE:
b03c9ccc AA	487	ieee802154_be64_to_le64(&wpan_dev->extended_addr,
	488	sdata->dev->dev_addr);
	489
d5ae67ba AA	490	sdata->dev->header_ops = &mac802154_header_ops;
	491	sdata->dev->destructor = mac802154_wpan_free;
	492	sdata->dev->netdev_ops = &mac802154_wpan_ops;
	493	sdata->dev->ml_priv = &mac802154_mlme_wpan;
863e88f2	494	wpan_dev->promiscuous_mode = false;
986a8abf	495
d5ae67ba	496	mutex_init(&sdata->sec_mtx);
986a8abf	497
d5ae67ba AA	498	mac802154_llsec_init(&sdata->sec);
d5ae67ba AA	499	break;
944742a3	500	case NL802154_IFTYPE_MONITOR:
d5ae67ba AA	501	sdata->dev->destructor = free_netdev;
d5ae67ba AA	502	sdata->dev->netdev_ops = &mac802154_monitor_ops;
863e88f2	503	wpan_dev->promiscuous_mode = true;
d5ae67ba AA	504	break;
	505	default:
	506	BUG();
	507	}
986a8abf AA	508
	509	return 0;
	510	}
	511
	512	struct net_device *
	513	ieee802154_if_add(struct ieee802154_local local, const char name,
5b4a1039 VB	514	unsigned char name_assign_type, enum nl802154_iftype type,
5b4a1039 VB	515	__le64 extended_addr)
986a8abf	516	{
d5ae67ba AA	517	struct net_device *ndev = NULL;
	518	struct ieee802154_sub_if_data *sdata = NULL;
	519	int ret = -ENOMEM;
	520
	521	ASSERT_RTNL();
	522
7c118c1a	523	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
5b4a1039	524	name_assign_type, ieee802154_if_setup);
d5ae67ba AA	525	if (!ndev)
	526	return ERR_PTR(-ENOMEM);
	527
	528	ndev->needed_headroom = local->hw.extra_tx_headroom;
	529
	530	ret = dev_alloc_name(ndev, ndev->name);
	531	if (ret < 0)
	532	goto err;
986a8abf	533
0e57547e AA	534	ieee802154_le64_to_be64(ndev->perm_addr,
0e57547e AA	535	&local->hw.phy->perm_extended_addr);
986a8abf	536	switch (type) {
944742a3	537	case NL802154_IFTYPE_NODE:
d5ae67ba	538	ndev->type = ARPHRD_IEEE802154;
0e57547e AA	539	if (ieee802154_is_valid_extended_addr(extended_addr))
	540	ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
	541	else
	542	memcpy(ndev->dev_addr, ndev->perm_addr,
	543	IEEE802154_EXTENDED_ADDR_LEN);
986a8abf	544	break;
944742a3	545	case NL802154_IFTYPE_MONITOR:
d5ae67ba	546	ndev->type = ARPHRD_IEEE802154_MONITOR;
986a8abf	547	break;
d5ae67ba AA	548	default:
	549	ret = -EINVAL;
	550	goto err;
986a8abf	551	}
d5ae67ba AA	552
	553	/* TODO check this */
	554	SET_NETDEV_DEV(ndev, &local->phy->dev);
	555	sdata = netdev_priv(ndev);
	556	ndev->ieee802154_ptr = &sdata->wpan_dev;
	557	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	558	sdata->dev = ndev;
	559	sdata->wpan_dev.wpan_phy = local->hw.phy;
	560	sdata->local = local;
	561
	562	/* setup type-dependent data */
	563	ret = ieee802154_setup_sdata(sdata, type);
	564	if (ret)
986a8abf AA	565	goto err;
986a8abf AA	566
473f3766 VB	567	ret = register_netdevice(ndev);
	568	if (ret < 0)
	569	goto err;
d5ae67ba AA	570
	571	mutex_lock(&local->iflist_mtx);
	572	list_add_tail_rcu(&sdata->list, &local->interfaces);
	573	mutex_unlock(&local->iflist_mtx);
986a8abf	574
d5ae67ba	575	return ndev;
986a8abf	576
986a8abf	577	err:
d5ae67ba AA	578	free_netdev(ndev);
d5ae67ba AA	579	return ERR_PTR(ret);
986a8abf AA	580	}
986a8abf AA	581
b210b187 AA	582	void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
	583	{
	584	ASSERT_RTNL();
	585
	586	mutex_lock(&sdata->local->iflist_mtx);
	587	list_del_rcu(&sdata->list);
	588	mutex_unlock(&sdata->local->iflist_mtx);
	589
	590	synchronize_rcu();
	591	unregister_netdevice(sdata->dev);
	592	}
592dfbfc AA	593
	594	void ieee802154_remove_interfaces(struct ieee802154_local *local)
	595	{
d14e1c71	596	struct ieee802154_sub_if_data sdata, tmp;
592dfbfc	597
2789e629	598	mutex_lock(&local->iflist_mtx);
d14e1c71	599	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
592dfbfc	600	list_del(&sdata->list);
592dfbfc AA	601
	602	unregister_netdevice(sdata->dev);
	603	}
2789e629	604	mutex_unlock(&local->iflist_mtx);
592dfbfc	605	}
be4fd8e5 AA	606
	607	static int netdev_notify(struct notifier_block *nb,
	608	unsigned long state, void *ptr)
	609	{
	610	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	611	struct ieee802154_sub_if_data *sdata;
	612
	613	if (state != NETDEV_CHANGENAME)
	614	return NOTIFY_DONE;
	615
	616	if (!dev->ieee802154_ptr \|\| !dev->ieee802154_ptr->wpan_phy)
	617	return NOTIFY_DONE;
	618
	619	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
	620	return NOTIFY_DONE;
	621
	622	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	623	memcpy(sdata->name, dev->name, IFNAMSIZ);
	624
	625	return NOTIFY_OK;
	626	}
	627
	628	static struct notifier_block mac802154_netdev_notifier = {
	629	.notifier_call = netdev_notify,
	630	};
	631
	632	int ieee802154_iface_init(void)
	633	{
	634	return register_netdevice_notifier(&mac802154_netdev_notifier);
	635	}
	636
	637	void ieee802154_iface_exit(void)
	638	{
	639	unregister_netdevice_notifier(&mac802154_netdev_notifier);
	640	}