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kernel-ark/net/mac802154/iface.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

744 lines
19 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2007-2012 Siemens AG
*
* 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;
/* lowpan need to be down for update
* SLAAC address after ifup
*/
if (sdata->wpan_dev.lowpan_dev) {
if (netif_running(sdata->wpan_dev.lowpan_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;
/* update lowpan interface mac address when
* wpan mac has been changed
*/
if (sdata->wpan_dev.lowpan_dev)
memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr,
dev->addr_len);
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 ieee802154_header_create(struct sk_buff *skb,
struct net_device *dev,
const struct ieee802154_addr *daddr,
const struct ieee802154_addr *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 const struct wpan_dev_header_ops ieee802154_header_ops = {
.create = ieee802154_header_create,
};
/* This header create functionality assumes a 8 byte array for
* source and destination pointer at maximum. To adapt this for
* the 802.15.4 dataframe header we use extended address handling
* here only and intra pan connection. fc fields are mostly fallback
* handling. For provide dev_hard_header for dgram sockets.
*/
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 = { };
int hlen;
if (!daddr)
return -EINVAL;
memset(&hdr.fc, 0, sizeof(hdr.fc));
hdr.fc.type = IEEE802154_FC_TYPE_DATA;
hdr.fc.ack_request = wpan_dev->ackreq;
hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
/* TODO currently a workaround to give zero cb block to set
* security parameters defaults according MIB.
*/
if (mac802154_set_header_security(sdata, &hdr, &cb) < 0)
return -EINVAL;
hdr.dest.pan_id = wpan_dev->pan_id;
hdr.dest.mode = IEEE802154_ADDR_LONG;
ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr);
hdr.source.pan_id = hdr.dest.pan_id;
hdr.source.mode = IEEE802154_ADDR_LONG;
if (!saddr)
hdr.source.extended_addr = wpan_dev->extended_addr;
else
ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr);
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;
if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
pr_debug("malformed packet\n");
return 0;
}
if (hdr.source.mode == IEEE802154_ADDR_LONG) {
ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr);
return IEEE802154_EXTENDED_ADDR_LEN;
}
return 0;
}
static const 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);
}
static void ieee802154_if_setup(struct net_device *dev)
{
dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
/* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
* will not send frames without any payload, but ack frames
* has no payload, so substract one that we can send a 3 bytes
* frame. The xmit callback assumes at least a hard header where two
* bytes fc and sequence field are set.
*/
dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1;
/* The auth_tag header is for security and places in private payload
* room of mac frame which stucks between payload and FCS field.
*/
dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN +
IEEE802154_FCS_LEN;
/* The mtu size is the payload without mac header in this case.
* We have a dynamic length header with a minimum header length
* which is hard_header_len. In this case we let mtu to the size
* of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN -
* hard_header_len. The FCS which is set by hardware or ndo_start_xmit
* and the minimum mac header which can be evaluated inside driver
* layer. The rest of mac header will be part of payload if greater
* than hard_header_len.
*/
dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN -
dev->hard_header_len;
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;
wpan_dev->frame_retries = 3;
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->needs_free_netdev = true;
sdata->dev->priv_destructor = mac802154_wpan_free;
sdata->dev->netdev_ops = &mac802154_wpan_ops;
sdata->dev->ml_priv = &mac802154_mlme_wpan;
wpan_dev->promiscuous_mode = false;
wpan_dev->header_ops = &ieee802154_header_ops;
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->needs_free_netdev = true;
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 +
IEEE802154_MAX_HEADER_LEN;
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);
dev_net_set(ndev, wpan_phy_net(local->hw.phy));
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);
}
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