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         if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR)
  66                 return err;
  67
  68         rtnl_lock();
  69
  70         switch (cmd) {
  71         case SIOCGIFADDR:
  72         {
  73                 u16 pan_id, short_addr;
  74
  75                 pan_id = le16_to_cpu(wpan_dev->pan_id);
  76                 short_addr = le16_to_cpu(wpan_dev->short_addr);
  77                 if (pan_id == IEEE802154_PANID_BROADCAST ||
  78                     short_addr == IEEE802154_ADDR_BROADCAST) {
  79                         err = -EADDRNOTAVAIL;
  80                         break;
  81                 }
  82
  83                 sa->family = AF_IEEE802154;
  84                 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
  85                 sa->addr.pan_id = pan_id;
  86                 sa->addr.short_addr = short_addr;
  87
  88                 err = 0;
  89                 break;
  90         }
  91         case SIOCSIFADDR:
  92                 if (netif_running(dev)) {
  93                         rtnl_unlock();
  94                         return -EBUSY;
  95                 }
  96
  97                 dev_warn(&dev->dev,
  98                          "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
  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
 108                 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
 109                 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
 110
 111                 err = mac802154_wpan_update_llsec(dev);
 112                 break;
 113         }
 114
 115         rtnl_unlock();
 116         return err;
 117 }
 118
 119 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
 120 {
 121         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 122         struct sockaddr *addr = p;
 123         __le64 extended_addr;
 124
 125         if (netif_running(dev))
 126                 return -EBUSY;
 127
 128         ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
 129         if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
 130                 return -EINVAL;
 131
 132         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 133         sdata->wpan_dev.extended_addr = extended_addr;
 134
 135         return mac802154_wpan_update_llsec(dev);
 136 }
 137
 138 static int mac802154_slave_open(struct net_device *dev)
 139 {
 140         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 141         struct ieee802154_local *local = sdata->local;
 142         int res = 0;
 143
 144         ASSERT_RTNL();
 145
 146         set_bit(SDATA_STATE_RUNNING, &sdata->state);
 147
 148         if (!local->open_count) {
 149                 res = drv_start(local);
 150                 if (res)
 151                         goto err;
 152         }
 153
 154         local->open_count++;
 155         netif_start_queue(dev);
 156         return 0;
 157 err:
 158         /* might already be clear but that doesn't matter */
 159         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 160
 161         return res;
 162 }
 163
 164 static int
 165 ieee802154_check_mac_settings(struct ieee802154_local *local,
 166                               struct wpan_dev *wpan_dev,
 167                               struct wpan_dev *nwpan_dev)
 168 {
 169         ASSERT_RTNL();
 170
 171         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 172                 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
 173                         return -EBUSY;
 174         }
 175
 176         if (local->hw.flags & IEEE802154_HW_AFILT) {
 177                 if (wpan_dev->pan_id != nwpan_dev->pan_id ||
 178                     wpan_dev->short_addr != nwpan_dev->short_addr ||
 179                     wpan_dev->extended_addr != nwpan_dev->extended_addr)
 180                         return -EBUSY;
 181         }
 182
 183         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 184                 if (wpan_dev->min_be != nwpan_dev->min_be ||
 185                     wpan_dev->max_be != nwpan_dev->max_be ||
 186                     wpan_dev->csma_retries != nwpan_dev->csma_retries)
 187                         return -EBUSY;
 188         }
 189
 190         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 191                 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
 192                         return -EBUSY;
 193         }
 194
 195         if (local->hw.flags & IEEE802154_HW_LBT) {
 196                 if (wpan_dev->lbt != nwpan_dev->lbt)
 197                         return -EBUSY;
 198         }
 199
 200         return 0;
 201 }
 202
 203 static int
 204 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
 205                                   enum nl802154_iftype iftype)
 206 {
 207         struct ieee802154_local *local = sdata->local;
 208         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 209         struct ieee802154_sub_if_data *nsdata;
 210
 211         /* we hold the RTNL here so can safely walk the list */
 212         list_for_each_entry(nsdata, &local->interfaces, list) {
 213                 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
 214                         int ret;
 215
 216                         /* TODO currently we don't support multiple node types
 217                          * we need to run skb_clone at rx path. Check if there
 218                          * exist really an use case if we need to support
 219                          * multiple node types at the same time.
 220                          */
 221                         if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
 222                             nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
 223                                 return -EBUSY;
 224
 225                         /* check all phy mac sublayer settings are the same.
 226                          * We have only one phy, different values makes trouble.
 227                          */
 228                         ret = ieee802154_check_mac_settings(local, wpan_dev,
 229                                                             &nsdata->wpan_dev);
 230                         if (ret < 0)
 231                                 return ret;
 232                 }
 233         }
 234
 235         return 0;
 236 }
 237
 238 static int mac802154_wpan_open(struct net_device *dev)
 239 {
 240         int rc;
 241         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 242         struct ieee802154_local *local = sdata->local;
 243         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 244
 245         rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
 246         if (rc < 0)
 247                 return rc;
 248
 249         rc = mac802154_slave_open(dev);
 250         if (rc < 0)
 251                 return rc;
 252
 253         if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
 254                 rc = drv_set_promiscuous_mode(local,
 255                                               wpan_dev->promiscuous_mode);
 256                 if (rc < 0)
 257                         goto out;
 258         }
 259
 260         if (local->hw.flags & IEEE802154_HW_AFILT) {
 261                 rc = drv_set_pan_id(local, wpan_dev->pan_id);
 262                 if (rc < 0)
 263                         goto out;
 264
 265                 rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
 266                 if (rc < 0)
 267                         goto out;
 268
 269                 rc = drv_set_short_addr(local, wpan_dev->short_addr);
 270                 if (rc < 0)
 271                         goto out;
 272         }
 273
 274         if (local->hw.flags & IEEE802154_HW_LBT) {
 275                 rc = drv_set_lbt_mode(local, wpan_dev->lbt);
 276                 if (rc < 0)
 277                         goto out;
 278         }
 279
 280         if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
 281                 rc = drv_set_csma_params(local, wpan_dev->min_be,
 282                                          wpan_dev->max_be,
 283                                          wpan_dev->csma_retries);
 284                 if (rc < 0)
 285                         goto out;
 286         }
 287
 288         if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
 289                 rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
 290                 if (rc < 0)
 291                         goto out;
 292         }
 293
 294 out:
 295         return rc;
 296 }
 297
 298 static int mac802154_slave_close(struct net_device *dev)
 299 {
 300         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 301         struct ieee802154_local *local = sdata->local;
 302
 303         ASSERT_RTNL();
 304
 305         hrtimer_cancel(&local->ifs_timer);
 306
 307         netif_stop_queue(dev);
 308         local->open_count--;
 309
 310         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 311
 312         if (!local->open_count)
 313                 drv_stop(local);
 314
 315         return 0;
 316 }
 317
 318 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
 319                                          struct ieee802154_hdr *hdr,
 320                                          const struct ieee802154_mac_cb *cb)
 321 {
 322         struct ieee802154_llsec_params params;
 323         u8 level;
 324
 325         mac802154_llsec_get_params(&sdata->sec, &params);
 326
 327         if (!params.enabled && cb->secen_override && cb->secen)
 328                 return -EINVAL;
 329         if (!params.enabled ||
 330             (cb->secen_override && !cb->secen) ||
 331             !params.out_level)
 332                 return 0;
 333         if (cb->seclevel_override && !cb->seclevel)
 334                 return -EINVAL;
 335
 336         level = cb->seclevel_override ? cb->seclevel : params.out_level;
 337
 338         hdr->fc.security_enabled = 1;
 339         hdr->sec.level = level;
 340         hdr->sec.key_id_mode = params.out_key.mode;
 341         if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
 342                 hdr->sec.short_src = params.out_key.short_source;
 343         else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
 344                 hdr->sec.extended_src = params.out_key.extended_source;
 345         hdr->sec.key_id = params.out_key.id;
 346
 347         return 0;
 348 }
 349
 350 static int mac802154_header_create(struct sk_buff *skb,
 351                                    struct net_device *dev,
 352                                    unsigned short type,
 353                                    const void *daddr,
 354                                    const void *saddr,
 355                                    unsigned len)
 356 {
 357         struct ieee802154_hdr hdr;
 358         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 359         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 360         struct ieee802154_mac_cb *cb = mac_cb(skb);
 361         int hlen;
 362
 363         if (!daddr)
 364                 return -EINVAL;
 365
 366         memset(&hdr.fc, 0, sizeof(hdr.fc));
 367         hdr.fc.type = cb->type;
 368         hdr.fc.security_enabled = cb->secen;
 369         hdr.fc.ack_request = cb->ackreq;
 370         hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
 371
 372         if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
 373                 return -EINVAL;
 374
 375         if (!saddr) {
 376                 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
 377                     wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
 378                     wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
 379                         hdr.source.mode = IEEE802154_ADDR_LONG;
 380                         hdr.source.extended_addr = wpan_dev->extended_addr;
 381                 } else {
 382                         hdr.source.mode = IEEE802154_ADDR_SHORT;
 383                         hdr.source.short_addr = wpan_dev->short_addr;
 384                 }
 385
 386                 hdr.source.pan_id = wpan_dev->pan_id;
 387         } else {
 388                 hdr.source = *(const struct ieee802154_addr *)saddr;
 389         }
 390
 391         hdr.dest = *(const struct ieee802154_addr *)daddr;
 392
 393         hlen = ieee802154_hdr_push(skb, &hdr);
 394         if (hlen < 0)
 395                 return -EINVAL;
 396
 397         skb_reset_mac_header(skb);
 398         skb->mac_len = hlen;
 399
 400         if (len > ieee802154_max_payload(&hdr))
 401                 return -EMSGSIZE;
 402
 403         return hlen;
 404 }
 405
 406 static int
 407 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 408 {
 409         struct ieee802154_hdr hdr;
 410         struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;
 411
 412         if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
 413                 pr_debug("malformed packet\n");
 414                 return 0;
 415         }
 416
 417         *addr = hdr.source;
 418         return sizeof(*addr);
 419 }
 420
 421 static struct header_ops mac802154_header_ops = {
 422         .create         = mac802154_header_create,
 423         .parse          = mac802154_header_parse,
 424 };
 425
 426 static const struct net_device_ops mac802154_wpan_ops = {
 427         .ndo_open               = mac802154_wpan_open,
 428         .ndo_stop               = mac802154_slave_close,
 429         .ndo_start_xmit         = ieee802154_subif_start_xmit,
 430         .ndo_do_ioctl           = mac802154_wpan_ioctl,
 431         .ndo_set_mac_address    = mac802154_wpan_mac_addr,
 432 };
 433
 434 static const struct net_device_ops mac802154_monitor_ops = {
 435         .ndo_open               = mac802154_wpan_open,
 436         .ndo_stop               = mac802154_slave_close,
 437         .ndo_start_xmit         = ieee802154_monitor_start_xmit,
 438 };
 439
 440 static void mac802154_wpan_free(struct net_device *dev)
 441 {
 442         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 443
 444         mac802154_llsec_destroy(&sdata->sec);
 445
 446         free_netdev(dev);
 447 }
 448
 449 static void ieee802154_if_setup(struct net_device *dev)
 450 {
 451         dev->addr_len           = IEEE802154_EXTENDED_ADDR_LEN;
 452         memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
 453
 454         dev->hard_header_len    = MAC802154_FRAME_HARD_HEADER_LEN;
 455         dev->needed_tailroom    = 2 + 16; /* FCS + MIC */
 456         dev->mtu                = IEEE802154_MTU;
 457         dev->tx_queue_len       = 300;
 458         dev->flags              = IFF_NOARP | IFF_BROADCAST;
 459 }
 460
 461 static int
 462 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
 463                        enum nl802154_iftype type)
 464 {
 465         struct wpan_dev *wpan_dev = &sdata->wpan_dev;
 466         u8 tmp;
 467
 468         /* set some type-dependent values */
 469         sdata->wpan_dev.iftype = type;
 470
 471         get_random_bytes(&tmp, sizeof(tmp));
 472         atomic_set(&wpan_dev->bsn, tmp);
 473         get_random_bytes(&tmp, sizeof(tmp));
 474         atomic_set(&wpan_dev->dsn, tmp);
 475
 476         /* defaults per 802.15.4-2011 */
 477         wpan_dev->min_be = 3;
 478         wpan_dev->max_be = 5;
 479         wpan_dev->csma_retries = 4;
 480         /* for compatibility, actual default is 3 */
 481         wpan_dev->frame_retries = -1;
 482
 483         wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 484         wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
 485
 486         switch (type) {
 487         case NL802154_IFTYPE_NODE:
 488                 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
 489                                         sdata->dev->dev_addr);
 490
 491                 sdata->dev->header_ops = &mac802154_header_ops;
 492                 sdata->dev->destructor = mac802154_wpan_free;
 493                 sdata->dev->netdev_ops = &mac802154_wpan_ops;
 494                 sdata->dev->ml_priv = &mac802154_mlme_wpan;
 495                 wpan_dev->promiscuous_mode = false;
 496
 497                 mutex_init(&sdata->sec_mtx);
 498
 499                 mac802154_llsec_init(&sdata->sec);
 500                 break;
 501         case NL802154_IFTYPE_MONITOR:
 502                 sdata->dev->destructor = free_netdev;
 503                 sdata->dev->netdev_ops = &mac802154_monitor_ops;
 504                 wpan_dev->promiscuous_mode = true;
 505                 break;
 506         default:
 507                 BUG();
 508         }
 509
 510         return 0;
 511 }
 512
 513 struct net_device *
 514 ieee802154_if_add(struct ieee802154_local *local, const char *name,
 515                   unsigned char name_assign_type, enum nl802154_iftype type,
 516                   __le64 extended_addr)
 517 {
 518         struct net_device *ndev = NULL;
 519         struct ieee802154_sub_if_data *sdata = NULL;
 520         int ret = -ENOMEM;
 521
 522         ASSERT_RTNL();
 523
 524         ndev = alloc_netdev(sizeof(*sdata), name,
 525                             name_assign_type, ieee802154_if_setup);
 526         if (!ndev)
 527                 return ERR_PTR(-ENOMEM);
 528
 529         ndev->needed_headroom = local->hw.extra_tx_headroom;
 530
 531         ret = dev_alloc_name(ndev, ndev->name);
 532         if (ret < 0)
 533                 goto err;
 534
 535         ieee802154_le64_to_be64(ndev->perm_addr,
 536                                 &local->hw.phy->perm_extended_addr);
 537         switch (type) {
 538         case NL802154_IFTYPE_NODE:
 539                 ndev->type = ARPHRD_IEEE802154;
 540                 if (ieee802154_is_valid_extended_unicast_addr(extended_addr))
 541                         ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
 542                 else
 543                         memcpy(ndev->dev_addr, ndev->perm_addr,
 544                                IEEE802154_EXTENDED_ADDR_LEN);
 545                 break;
 546         case NL802154_IFTYPE_MONITOR:
 547                 ndev->type = ARPHRD_IEEE802154_MONITOR;
 548                 break;
 549         default:
 550                 ret = -EINVAL;
 551                 goto err;
 552         }
 553
 554         /* TODO check this */
 555         SET_NETDEV_DEV(ndev, &local->phy->dev);
 556         sdata = netdev_priv(ndev);
 557         ndev->ieee802154_ptr = &sdata->wpan_dev;
 558         memcpy(sdata->name, ndev->name, IFNAMSIZ);
 559         sdata->dev = ndev;
 560         sdata->wpan_dev.wpan_phy = local->hw.phy;
 561         sdata->local = local;
 562
 563         /* setup type-dependent data */
 564         ret = ieee802154_setup_sdata(sdata, type);
 565         if (ret)
 566                 goto err;
 567
 568         ret = register_netdevice(ndev);
 569         if (ret < 0)
 570                 goto err;
 571
 572         mutex_lock(&local->iflist_mtx);
 573         list_add_tail_rcu(&sdata->list, &local->interfaces);
 574         mutex_unlock(&local->iflist_mtx);
 575
 576         return ndev;
 577
 578 err:
 579         free_netdev(ndev);
 580         return ERR_PTR(ret);
 581 }
 582
 583 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
 584 {
 585         ASSERT_RTNL();
 586
 587         mutex_lock(&sdata->local->iflist_mtx);
 588         list_del_rcu(&sdata->list);
 589         mutex_unlock(&sdata->local->iflist_mtx);
 590
 591         synchronize_rcu();
 592         unregister_netdevice(sdata->dev);
 593 }
 594
 595 void ieee802154_remove_interfaces(struct ieee802154_local *local)
 596 {
 597         struct ieee802154_sub_if_data *sdata, *tmp;
 598
 599         mutex_lock(&local->iflist_mtx);
 600         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 601                 list_del(&sdata->list);
 602
 603                 unregister_netdevice(sdata->dev);
 604         }
 605         mutex_unlock(&local->iflist_mtx);
 606 }
 607
 608 static int netdev_notify(struct notifier_block *nb,
 609                          unsigned long state, void *ptr)
 610 {
 611         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 612         struct ieee802154_sub_if_data *sdata;
 613
 614         if (state != NETDEV_CHANGENAME)
 615                 return NOTIFY_DONE;
 616
 617         if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
 618                 return NOTIFY_DONE;
 619
 620         if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
 621                 return NOTIFY_DONE;
 622
 623         sdata = IEEE802154_DEV_TO_SUB_IF(dev);
 624         memcpy(sdata->name, dev->name, IFNAMSIZ);
 625
 626         return NOTIFY_OK;
 627 }
 628
 629 static struct notifier_block mac802154_netdev_notifier = {
 630         .notifier_call = netdev_notify,
 631 };
 632
 633 int ieee802154_iface_init(void)
 634 {
 635         return register_netdevice_notifier(&mac802154_netdev_notifier);
 636 }
 637
 638 void ieee802154_iface_exit(void)
 639 {
 640         unregister_netdevice_notifier(&mac802154_netdev_notifier);
 641 }