net/mac802154/iface.c

   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  *
  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>
  23 #include <linux/ieee802154.h>
  24
  25 #include <net/nl802154.h>
  26 #include <net/mac802154.h>
  27 #include <net/ieee802154_netdev.h>
  28 #include <net/cfg802154.h>
  29
  30 #include "ieee802154_i.h"
  31 #include "driver-ops.h"
  32
  33 static int mac802154_wpan_update_llsec(struct net_device *dev)
  34 {
  35         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
  36         struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
  37         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
  38         int rc = 0;
  39
  40         if (ops->llsec) {
  41                 struct ieee802154_llsec_params params;
  42                 int changed = 0;
  43
  44                 params.pan_id = wpan_dev->pan_id;
  45                 changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
  46
  47                 params.hwaddr = wpan_dev->extended_addr;
  48                 changed |= IEEE802154_LLSEC_PARAM_HWADDR;
  49
  50                 rc = ops->llsec->set_params(dev, &params, changed);
  51         }
  52
  53         return rc;
  54 }
  55
  56 static int
  57 mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
  58 {
  59         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
  60         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
  61         struct sockaddr_ieee802154 *sa =
  62                 (struct sockaddr_ieee802154 *)&ifr->ifr_addr;
  63         int err = -ENOIOCTLCMD;
  64
  65         rtnl_lock();
  66
  67         switch (cmd) {
  68         case SIOCGIFADDR:
  69         {
  70                 u16 pan_id, short_addr;
  71
  72                 pan_id = le16_to_cpu(wpan_dev->pan_id);
  73                 short_addr = le16_to_cpu(wpan_dev->short_addr);
  74                 if (pan_id == IEEE802154_PANID_BROADCAST ||
  75                     short_addr == IEEE802154_ADDR_BROADCAST) {
  76                         err = -EADDRNOTAVAIL;
  77                         break;
  78                 }
  79
  80                 sa->family = AF_IEEE802154;
  81                 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
  82                 sa->addr.pan_id = pan_id;
  83                 sa->addr.short_addr = short_addr;
  84
  85                 err = 0;
  86                 break;
  87         }
  88         case SIOCSIFADDR:
  89                 if (netif_running(dev)) {
  90                         rtnl_unlock();
  91                         return -EBUSY;
  92                 }
  93
  94                 dev_warn(&dev->dev,
  95                          "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
  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
 105                 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
 106                 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
 107
 108                 err = mac802154_wpan_update_llsec(dev);
 109                 break;
 110         }
 111
 112         rtnl_unlock();
 113         return err;
 114 }
 115
 116 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
 117 {
 118         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 119         struct sockaddr *addr = p;
 120         __le64 extended_addr;
 121
 122         if (netif_running(dev))
 123                 return -EBUSY;
 124
 125         ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
 126         if (!ieee802154_is_valid_extended_addr(extended_addr))
 127                 return -EINVAL;
 128
 129         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 130         sdata->wpan_dev.extended_addr = extended_addr;
 131
 132         return mac802154_wpan_update_llsec(dev);
 133 }
 134
 135 static int mac802154_slave_open(struct net_device *dev)
 136 {
 137         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 138         struct ieee802154_local *local = sdata->local;
 139         int res = 0;
 140
 141         ASSERT_RTNL();
 142
 143         set_bit(SDATA_STATE_RUNNING, &sdata->state);
 144
 145         if (!local->open_count) {
 146                 res = drv_start(local);
 147                 WARN_ON(res);
 148                 if (res)
 149                         goto err;
 150         }
 151
 152         local->open_count++;
 153         netif_start_queue(dev);
 154         return 0;
 155 err:
 156         /* might already be clear but that doesn't matter */
 157         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 158
 159         return res;
 160 }
 161
 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) {
 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)
 178                         return -EBUSY;
 179         }
 180
 181         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 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)
 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
 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
 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
 236 static int mac802154_wpan_open(struct net_device *dev)
 237 {
 238         int rc;
 239         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 240         struct ieee802154_local *local = sdata->local;
 241         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 242
 243         rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
 244         if (rc < 0)
 245                 return rc;
 246
 247         rc = mac802154_slave_open(dev);
 248         if (rc < 0)
 249                 return rc;
 250
 251         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 252                 rc = drv_set_promiscuous_mode(local,
 253                                               wpan_dev->promiscuous_mode);
 254                 if (rc < 0)
 255                         goto out;
 256         }
 257
 258         if (local->hw.flags & IEEE802154_HW_AFILT) {
 259                 rc = drv_set_pan_id(local, wpan_dev->pan_id);
 260                 if (rc < 0)
 261                         goto out;
 262
 263                 rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
 264                 if (rc < 0)
 265                         goto out;
 266
 267                 rc = drv_set_short_addr(local, wpan_dev->short_addr);
 268                 if (rc < 0)
 269                         goto out;
 270         }
 271
 272         if (local->hw.flags & IEEE802154_HW_LBT) {
 273                 rc = drv_set_lbt_mode(local, wpan_dev->lbt);
 274                 if (rc < 0)
 275                         goto out;
 276         }
 277
 278         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 279                 rc = drv_set_csma_params(local, wpan_dev->min_be,
 280                                          wpan_dev->max_be,
 281                                          wpan_dev->csma_retries);
 282                 if (rc < 0)
 283                         goto out;
 284         }
 285
 286         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 287                 rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
 288                 if (rc < 0)
 289                         goto out;
 290         }
 291
 292 out:
 293         return rc;
 294 }
 295
 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
 303         hrtimer_cancel(&local->ifs_timer);
 304
 305         netif_stop_queue(dev);
 306         local->open_count--;
 307
 308         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 309
 310         if (!local->open_count)
 311                 drv_stop(local);
 312
 313         return 0;
 314 }
 315
 316 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
 317                                          struct ieee802154_hdr *hdr,
 318                                          const struct ieee802154_mac_cb *cb)
 319 {
 320         struct ieee802154_llsec_params params;
 321         u8 level;
 322
 323         mac802154_llsec_get_params(&sdata->sec, &params);
 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
 348 static int mac802154_header_create(struct sk_buff *skb,
 349                                    struct net_device *dev,
 350                                    unsigned short type,
 351                                    const void *daddr,
 352                                    const void *saddr,
 353                                    unsigned len)
 354 {
 355         struct ieee802154_hdr hdr;
 356         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 357         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 358         struct ieee802154_mac_cb *cb = mac_cb(skb);
 359         int hlen;
 360
 361         if (!daddr)
 362                 return -EINVAL;
 363
 364         memset(&hdr.fc, 0, sizeof(hdr.fc));
 365         hdr.fc.type = cb->type;
 366         hdr.fc.security_enabled = cb->secen;
 367         hdr.fc.ack_request = cb->ackreq;
 368         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 369
 370         if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
 371                 return -EINVAL;
 372
 373         if (!saddr) {
 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)) {
 377                         hdr.source.mode = IEEE802154_ADDR_LONG;
 378                         hdr.source.extended_addr = wpan_dev->extended_addr;
 379                 } else {
 380                         hdr.source.mode = IEEE802154_ADDR_SHORT;
 381                         hdr.source.short_addr = wpan_dev->short_addr;
 382                 }
 383
 384                 hdr.source.pan_id = wpan_dev->pan_id;
 385         } else {
 386                 hdr.source = *(const struct ieee802154_addr *)saddr;
 387         }
 388
 389         hdr.dest = *(const struct ieee802154_addr *)daddr;
 390
 391         hlen = ieee802154_hdr_push(skb, &hdr);
 392         if (hlen < 0)
 393                 return -EINVAL;
 394
 395         skb_reset_mac_header(skb);
 396         skb->mac_len = hlen;
 397
 398         if (len > ieee802154_max_payload(&hdr))
 399                 return -EMSGSIZE;
 400
 401         return hlen;
 402 }
 403
 404 static int
 405 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 406 {
 407         struct ieee802154_hdr hdr;
 408         struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;
 409
 410         if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
 411                 pr_debug("malformed packet\n");
 412                 return 0;
 413         }
 414
 415         *addr = hdr.source;
 416         return sizeof(*addr);
 417 }
 418
 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 = {
 425         .ndo_open               = mac802154_wpan_open,
 426         .ndo_stop               = mac802154_slave_close,
 427         .ndo_start_xmit         = ieee802154_subif_start_xmit,
 428         .ndo_do_ioctl           = mac802154_wpan_ioctl,
 429         .ndo_set_mac_address    = mac802154_wpan_mac_addr,
 430 };
 431
 432 static const struct net_device_ops mac802154_monitor_ops = {
 433         .ndo_open               = mac802154_wpan_open,
 434         .ndo_stop               = mac802154_slave_close,
 435         .ndo_start_xmit         = ieee802154_monitor_start_xmit,
 436 };
 437
 438 static void mac802154_wpan_free(struct net_device *dev)
 439 {
 440         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 441
 442         mac802154_llsec_destroy(&sdata->sec);
 443
 444         free_netdev(dev);
 445 }
 446
 447 static void ieee802154_if_setup(struct net_device *dev)
 448 {
 449         dev->addr_len           = IEEE802154_EXTENDED_ADDR_LEN;
 450         memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
 451
 452         dev->hard_header_len    = MAC802154_FRAME_HARD_HEADER_LEN;
 453         dev->needed_tailroom    = 2 + 16; /* FCS + MIC */
 454         dev->mtu                = IEEE802154_MTU;
 455         dev->tx_queue_len       = 300;
 456         dev->flags              = IFF_NOARP | IFF_BROADCAST;
 457 }
 458
 459 static int
 460 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
 461                        enum nl802154_iftype type)
 462 {
 463         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 464         u8 tmp;
 465
 466         /* set some type-dependent values */
 467         sdata->vif.type = type;
 468         sdata->wpan_dev.iftype = type;
 469
 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);
 474
 475         /* defaults per 802.15.4-2011 */
 476         wpan_dev->min_be = 3;
 477         wpan_dev->max_be = 5;
 478         wpan_dev->csma_retries = 4;
 479         /* for compatibility, actual default is 3 */
 480         wpan_dev->frame_retries = -1;
 481
 482         wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 483         wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
 484
 485         switch (type) {
 486         case NL802154_IFTYPE_NODE:
 487                 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
 488                                         sdata->dev->dev_addr);
 489
 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;
 494                 wpan_dev->promiscuous_mode = false;
 495
 496                 mutex_init(&sdata->sec_mtx);
 497
 498                 mac802154_llsec_init(&sdata->sec);
 499                 break;
 500         case NL802154_IFTYPE_MONITOR:
 501                 sdata->dev->destructor = free_netdev;
 502                 sdata->dev->netdev_ops = &mac802154_monitor_ops;
 503                 wpan_dev->promiscuous_mode = true;
 504                 break;
 505         default:
 506                 BUG();
 507         }
 508
 509         return 0;
 510 }
 511
 512 struct net_device *
 513 ieee802154_if_add(struct ieee802154_local *local, const char *name,
 514                   unsigned char name_assign_type, enum nl802154_iftype type,
 515                   __le64 extended_addr)
 516 {
 517         struct net_device *ndev = NULL;
 518         struct ieee802154_sub_if_data *sdata = NULL;
 519         int ret = -ENOMEM;
 520
 521         ASSERT_RTNL();
 522
 523         ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
 524                             name_assign_type, ieee802154_if_setup);
 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;
 533
 534         ieee802154_le64_to_be64(ndev->perm_addr,
 535                                 &local->hw.phy->perm_extended_addr);
 536         switch (type) {
 537         case NL802154_IFTYPE_NODE:
 538                 ndev->type = ARPHRD_IEEE802154;
 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);
 544                 break;
 545         case NL802154_IFTYPE_MONITOR:
 546                 ndev->type = ARPHRD_IEEE802154_MONITOR;
 547                 break;
 548         default:
 549                 ret = -EINVAL;
 550                 goto err;
 551         }
 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)
 565                 goto err;
 566
 567         ret = register_netdevice(ndev);
 568         if (ret < 0)
 569                 goto err;
 570
 571         mutex_lock(&local->iflist_mtx);
 572         list_add_tail_rcu(&sdata->list, &local->interfaces);
 573         mutex_unlock(&local->iflist_mtx);
 574
 575         return ndev;
 576
 577 err:
 578         free_netdev(ndev);
 579         return ERR_PTR(ret);
 580 }
 581
 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 }
 593
 594 void ieee802154_remove_interfaces(struct ieee802154_local *local)
 595 {
 596         struct ieee802154_sub_if_data *sdata, *tmp;
 597
 598         mutex_lock(&local->iflist_mtx);
 599         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 600                 list_del(&sdata->list);
 601
 602                 unregister_netdevice(sdata->dev);
 603         }
 604         mutex_unlock(&local->iflist_mtx);
 605 }
 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 }