1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2007-2012 Siemens AG 4 * 5 * Written by: 6 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> 7 * Sergey Lapin <slapin@ossfans.org> 8 * Maxim Gorbachyov <maxim.gorbachev@siemens.com> 9 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> 10 */ 11 12 #include <linux/netdevice.h> 13 #include <linux/module.h> 14 #include <linux/if_arp.h> 15 #include <linux/ieee802154.h> 16 17 #include <net/nl802154.h> 18 #include <net/mac802154.h> 19 #include <net/ieee802154_netdev.h> 20 #include <net/cfg802154.h> 21 22 #include "ieee802154_i.h" 23 #include "driver-ops.h" 24 25 int mac802154_wpan_update_llsec(struct net_device *dev) 26 { 27 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 28 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev); 29 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 30 int rc = 0; 31 32 if (ops->llsec) { 33 struct ieee802154_llsec_params params; 34 int changed = 0; 35 36 params.pan_id = wpan_dev->pan_id; 37 changed |= IEEE802154_LLSEC_PARAM_PAN_ID; 38 39 params.hwaddr = wpan_dev->extended_addr; 40 changed |= IEEE802154_LLSEC_PARAM_HWADDR; 41 42 rc = ops->llsec->set_params(dev, ¶ms, changed); 43 } 44 45 return rc; 46 } 47 48 static int 49 mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 50 { 51 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 52 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 53 struct sockaddr_ieee802154 *sa = 54 (struct sockaddr_ieee802154 *)&ifr->ifr_addr; 55 int err = -ENOIOCTLCMD; 56 57 if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR) 58 return err; 59 60 rtnl_lock(); 61 62 switch (cmd) { 63 case SIOCGIFADDR: 64 { 65 u16 pan_id, short_addr; 66 67 pan_id = le16_to_cpu(wpan_dev->pan_id); 68 short_addr = le16_to_cpu(wpan_dev->short_addr); 69 if (pan_id == IEEE802154_PANID_BROADCAST || 70 short_addr == IEEE802154_ADDR_BROADCAST) { 71 err = -EADDRNOTAVAIL; 72 break; 73 } 74 75 sa->family = AF_IEEE802154; 76 sa->addr.addr_type = IEEE802154_ADDR_SHORT; 77 sa->addr.pan_id = pan_id; 78 sa->addr.short_addr = short_addr; 79 80 err = 0; 81 break; 82 } 83 case SIOCSIFADDR: 84 if (netif_running(dev)) { 85 rtnl_unlock(); 86 return -EBUSY; 87 } 88 89 dev_warn(&dev->dev, 90 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n"); 91 if (sa->family != AF_IEEE802154 || 92 sa->addr.addr_type != IEEE802154_ADDR_SHORT || 93 sa->addr.pan_id == IEEE802154_PANID_BROADCAST || 94 sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || 95 sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { 96 err = -EINVAL; 97 break; 98 } 99 100 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id); 101 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr); 102 103 err = mac802154_wpan_update_llsec(dev); 104 break; 105 } 106 107 rtnl_unlock(); 108 return err; 109 } 110 111 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) 112 { 113 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 114 struct sockaddr *addr = p; 115 __le64 extended_addr; 116 117 if (netif_running(dev)) 118 return -EBUSY; 119 120 /* lowpan need to be down for update 121 * SLAAC address after ifup 122 */ 123 if (sdata->wpan_dev.lowpan_dev) { 124 if (netif_running(sdata->wpan_dev.lowpan_dev)) 125 return -EBUSY; 126 } 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 dev_addr_set(dev, addr->sa_data); 133 sdata->wpan_dev.extended_addr = extended_addr; 134 135 /* update lowpan interface mac address when 136 * wpan mac has been changed 137 */ 138 if (sdata->wpan_dev.lowpan_dev) 139 dev_addr_set(sdata->wpan_dev.lowpan_dev, dev->dev_addr); 140 141 return mac802154_wpan_update_llsec(dev); 142 } 143 144 static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata) 145 { 146 struct ieee802154_local *local = sdata->local; 147 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 148 int ret; 149 150 sdata->required_filtering = sdata->iface_default_filtering; 151 152 if (local->hw.flags & IEEE802154_HW_AFILT) { 153 local->addr_filt.pan_id = wpan_dev->pan_id; 154 local->addr_filt.ieee_addr = wpan_dev->extended_addr; 155 local->addr_filt.short_addr = wpan_dev->short_addr; 156 } 157 158 if (local->hw.flags & IEEE802154_HW_LBT) { 159 ret = drv_set_lbt_mode(local, wpan_dev->lbt); 160 if (ret < 0) 161 return ret; 162 } 163 164 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { 165 ret = drv_set_csma_params(local, wpan_dev->min_be, 166 wpan_dev->max_be, 167 wpan_dev->csma_retries); 168 if (ret < 0) 169 return ret; 170 } 171 172 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { 173 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries); 174 if (ret < 0) 175 return ret; 176 } 177 178 return 0; 179 } 180 181 static int mac802154_slave_open(struct net_device *dev) 182 { 183 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 184 struct ieee802154_local *local = sdata->local; 185 int res; 186 187 ASSERT_RTNL(); 188 189 set_bit(SDATA_STATE_RUNNING, &sdata->state); 190 191 if (!local->open_count) { 192 res = ieee802154_setup_hw(sdata); 193 if (res) 194 goto err; 195 196 res = drv_start(local, sdata->required_filtering, 197 &local->addr_filt); 198 if (res) 199 goto err; 200 } 201 202 local->open_count++; 203 netif_start_queue(dev); 204 return 0; 205 err: 206 /* might already be clear but that doesn't matter */ 207 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 208 209 return res; 210 } 211 212 static int 213 ieee802154_check_mac_settings(struct ieee802154_local *local, 214 struct ieee802154_sub_if_data *sdata, 215 struct ieee802154_sub_if_data *nsdata) 216 { 217 struct wpan_dev *nwpan_dev = &nsdata->wpan_dev; 218 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 219 220 ASSERT_RTNL(); 221 222 if (sdata->iface_default_filtering != nsdata->iface_default_filtering) 223 return -EBUSY; 224 225 if (local->hw.flags & IEEE802154_HW_AFILT) { 226 if (wpan_dev->pan_id != nwpan_dev->pan_id || 227 wpan_dev->short_addr != nwpan_dev->short_addr || 228 wpan_dev->extended_addr != nwpan_dev->extended_addr) 229 return -EBUSY; 230 } 231 232 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { 233 if (wpan_dev->min_be != nwpan_dev->min_be || 234 wpan_dev->max_be != nwpan_dev->max_be || 235 wpan_dev->csma_retries != nwpan_dev->csma_retries) 236 return -EBUSY; 237 } 238 239 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { 240 if (wpan_dev->frame_retries != nwpan_dev->frame_retries) 241 return -EBUSY; 242 } 243 244 if (local->hw.flags & IEEE802154_HW_LBT) { 245 if (wpan_dev->lbt != nwpan_dev->lbt) 246 return -EBUSY; 247 } 248 249 return 0; 250 } 251 252 static int 253 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata, 254 enum nl802154_iftype iftype) 255 { 256 struct ieee802154_local *local = sdata->local; 257 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 258 struct ieee802154_sub_if_data *nsdata; 259 260 /* we hold the RTNL here so can safely walk the list */ 261 list_for_each_entry(nsdata, &local->interfaces, list) { 262 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) { 263 int ret; 264 265 /* TODO currently we don't support multiple node types 266 * we need to run skb_clone at rx path. Check if there 267 * exist really an use case if we need to support 268 * multiple node types at the same time. 269 */ 270 if (wpan_dev->iftype == NL802154_IFTYPE_NODE && 271 nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE) 272 return -EBUSY; 273 274 /* check all phy mac sublayer settings are the same. 275 * We have only one phy, different values makes trouble. 276 */ 277 ret = ieee802154_check_mac_settings(local, sdata, nsdata); 278 if (ret < 0) 279 return ret; 280 } 281 } 282 283 return 0; 284 } 285 286 static int mac802154_wpan_open(struct net_device *dev) 287 { 288 int rc; 289 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 290 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 291 292 rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype); 293 if (rc < 0) 294 return rc; 295 296 return mac802154_slave_open(dev); 297 } 298 299 static int mac802154_slave_close(struct net_device *dev) 300 { 301 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 302 struct ieee802154_local *local = sdata->local; 303 304 ASSERT_RTNL(); 305 306 netif_stop_queue(dev); 307 local->open_count--; 308 309 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 310 311 if (!local->open_count) 312 ieee802154_stop_device(local); 313 314 return 0; 315 } 316 317 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, 318 struct ieee802154_hdr *hdr, 319 const struct ieee802154_mac_cb *cb) 320 { 321 struct ieee802154_llsec_params params; 322 u8 level; 323 324 mac802154_llsec_get_params(&sdata->sec, ¶ms); 325 326 if (!params.enabled && cb->secen_override && cb->secen) 327 return -EINVAL; 328 if (!params.enabled || 329 (cb->secen_override && !cb->secen) || 330 !params.out_level) 331 return 0; 332 if (cb->seclevel_override && !cb->seclevel) 333 return -EINVAL; 334 335 level = cb->seclevel_override ? cb->seclevel : params.out_level; 336 337 hdr->fc.security_enabled = 1; 338 hdr->sec.level = level; 339 hdr->sec.key_id_mode = params.out_key.mode; 340 if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) 341 hdr->sec.short_src = params.out_key.short_source; 342 else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) 343 hdr->sec.extended_src = params.out_key.extended_source; 344 hdr->sec.key_id = params.out_key.id; 345 346 return 0; 347 } 348 349 static int ieee802154_header_create(struct sk_buff *skb, 350 struct net_device *dev, 351 const struct ieee802154_addr *daddr, 352 const struct ieee802154_addr *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 const struct wpan_dev_header_ops ieee802154_header_ops = { 405 .create = ieee802154_header_create, 406 }; 407 408 /* This header create functionality assumes a 8 byte array for 409 * source and destination pointer at maximum. To adapt this for 410 * the 802.15.4 dataframe header we use extended address handling 411 * here only and intra pan connection. fc fields are mostly fallback 412 * handling. For provide dev_hard_header for dgram sockets. 413 */ 414 static int mac802154_header_create(struct sk_buff *skb, 415 struct net_device *dev, 416 unsigned short type, 417 const void *daddr, 418 const void *saddr, 419 unsigned len) 420 { 421 struct ieee802154_hdr hdr; 422 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 423 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 424 struct ieee802154_mac_cb cb = { }; 425 int hlen; 426 427 if (!daddr) 428 return -EINVAL; 429 430 memset(&hdr.fc, 0, sizeof(hdr.fc)); 431 hdr.fc.type = IEEE802154_FC_TYPE_DATA; 432 hdr.fc.ack_request = wpan_dev->ackreq; 433 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; 434 435 /* TODO currently a workaround to give zero cb block to set 436 * security parameters defaults according MIB. 437 */ 438 if (mac802154_set_header_security(sdata, &hdr, &cb) < 0) 439 return -EINVAL; 440 441 hdr.dest.pan_id = wpan_dev->pan_id; 442 hdr.dest.mode = IEEE802154_ADDR_LONG; 443 ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr); 444 445 hdr.source.pan_id = hdr.dest.pan_id; 446 hdr.source.mode = IEEE802154_ADDR_LONG; 447 448 if (!saddr) 449 hdr.source.extended_addr = wpan_dev->extended_addr; 450 else 451 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr); 452 453 hlen = ieee802154_hdr_push(skb, &hdr); 454 if (hlen < 0) 455 return -EINVAL; 456 457 skb_reset_mac_header(skb); 458 skb->mac_len = hlen; 459 460 if (len > ieee802154_max_payload(&hdr)) 461 return -EMSGSIZE; 462 463 return hlen; 464 } 465 466 static int 467 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) 468 { 469 struct ieee802154_hdr hdr; 470 471 if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { 472 pr_debug("malformed packet\n"); 473 return 0; 474 } 475 476 if (hdr.source.mode == IEEE802154_ADDR_LONG) { 477 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr); 478 return IEEE802154_EXTENDED_ADDR_LEN; 479 } 480 481 return 0; 482 } 483 484 static const struct header_ops mac802154_header_ops = { 485 .create = mac802154_header_create, 486 .parse = mac802154_header_parse, 487 }; 488 489 static const struct net_device_ops mac802154_wpan_ops = { 490 .ndo_open = mac802154_wpan_open, 491 .ndo_stop = mac802154_slave_close, 492 .ndo_start_xmit = ieee802154_subif_start_xmit, 493 .ndo_do_ioctl = mac802154_wpan_ioctl, 494 .ndo_set_mac_address = mac802154_wpan_mac_addr, 495 }; 496 497 static const struct net_device_ops mac802154_monitor_ops = { 498 .ndo_open = mac802154_wpan_open, 499 .ndo_stop = mac802154_slave_close, 500 .ndo_start_xmit = ieee802154_monitor_start_xmit, 501 }; 502 503 static void mac802154_wpan_free(struct net_device *dev) 504 { 505 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 506 507 mac802154_llsec_destroy(&sdata->sec); 508 } 509 510 static void ieee802154_if_setup(struct net_device *dev) 511 { 512 dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN; 513 memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN); 514 515 /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET 516 * will not send frames without any payload, but ack frames 517 * has no payload, so substract one that we can send a 3 bytes 518 * frame. The xmit callback assumes at least a hard header where two 519 * bytes fc and sequence field are set. 520 */ 521 dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1; 522 /* The auth_tag header is for security and places in private payload 523 * room of mac frame which stucks between payload and FCS field. 524 */ 525 dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN + 526 IEEE802154_FCS_LEN; 527 /* The mtu size is the payload without mac header in this case. 528 * We have a dynamic length header with a minimum header length 529 * which is hard_header_len. In this case we let mtu to the size 530 * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN - 531 * hard_header_len. The FCS which is set by hardware or ndo_start_xmit 532 * and the minimum mac header which can be evaluated inside driver 533 * layer. The rest of mac header will be part of payload if greater 534 * than hard_header_len. 535 */ 536 dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN - 537 dev->hard_header_len; 538 dev->tx_queue_len = 300; 539 dev->flags = IFF_NOARP | IFF_BROADCAST; 540 } 541 542 static int 543 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, 544 enum nl802154_iftype type) 545 { 546 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 547 int ret; 548 u8 tmp; 549 550 /* set some type-dependent values */ 551 sdata->wpan_dev.iftype = type; 552 553 get_random_bytes(&tmp, sizeof(tmp)); 554 atomic_set(&wpan_dev->bsn, tmp); 555 get_random_bytes(&tmp, sizeof(tmp)); 556 atomic_set(&wpan_dev->dsn, tmp); 557 558 /* defaults per 802.15.4-2011 */ 559 wpan_dev->min_be = 3; 560 wpan_dev->max_be = 5; 561 wpan_dev->csma_retries = 4; 562 wpan_dev->frame_retries = 3; 563 564 wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); 565 wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); 566 567 switch (type) { 568 case NL802154_IFTYPE_NODE: 569 ieee802154_be64_to_le64(&wpan_dev->extended_addr, 570 sdata->dev->dev_addr); 571 572 sdata->dev->header_ops = &mac802154_header_ops; 573 sdata->dev->needs_free_netdev = true; 574 sdata->dev->priv_destructor = mac802154_wpan_free; 575 sdata->dev->netdev_ops = &mac802154_wpan_ops; 576 sdata->dev->ml_priv = &mac802154_mlme_wpan; 577 sdata->iface_default_filtering = IEEE802154_FILTERING_4_FRAME_FIELDS; 578 wpan_dev->header_ops = &ieee802154_header_ops; 579 580 mutex_init(&sdata->sec_mtx); 581 582 mac802154_llsec_init(&sdata->sec); 583 ret = mac802154_wpan_update_llsec(sdata->dev); 584 if (ret < 0) 585 return ret; 586 587 break; 588 case NL802154_IFTYPE_MONITOR: 589 sdata->dev->needs_free_netdev = true; 590 sdata->dev->netdev_ops = &mac802154_monitor_ops; 591 sdata->iface_default_filtering = IEEE802154_FILTERING_NONE; 592 break; 593 default: 594 BUG(); 595 } 596 597 return 0; 598 } 599 600 struct net_device * 601 ieee802154_if_add(struct ieee802154_local *local, const char *name, 602 unsigned char name_assign_type, enum nl802154_iftype type, 603 __le64 extended_addr) 604 { 605 u8 addr[IEEE802154_EXTENDED_ADDR_LEN]; 606 struct net_device *ndev = NULL; 607 struct ieee802154_sub_if_data *sdata = NULL; 608 int ret; 609 610 ASSERT_RTNL(); 611 612 ndev = alloc_netdev(sizeof(*sdata), name, 613 name_assign_type, ieee802154_if_setup); 614 if (!ndev) 615 return ERR_PTR(-ENOMEM); 616 617 ndev->needed_headroom = local->hw.extra_tx_headroom + 618 IEEE802154_MAX_HEADER_LEN; 619 620 ret = dev_alloc_name(ndev, ndev->name); 621 if (ret < 0) 622 goto err; 623 624 ieee802154_le64_to_be64(ndev->perm_addr, 625 &local->hw.phy->perm_extended_addr); 626 switch (type) { 627 case NL802154_IFTYPE_NODE: 628 ndev->type = ARPHRD_IEEE802154; 629 if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) { 630 ieee802154_le64_to_be64(addr, &extended_addr); 631 dev_addr_set(ndev, addr); 632 } else { 633 dev_addr_set(ndev, ndev->perm_addr); 634 } 635 break; 636 case NL802154_IFTYPE_MONITOR: 637 ndev->type = ARPHRD_IEEE802154_MONITOR; 638 break; 639 default: 640 ret = -EINVAL; 641 goto err; 642 } 643 644 /* TODO check this */ 645 SET_NETDEV_DEV(ndev, &local->phy->dev); 646 dev_net_set(ndev, wpan_phy_net(local->hw.phy)); 647 sdata = netdev_priv(ndev); 648 ndev->ieee802154_ptr = &sdata->wpan_dev; 649 memcpy(sdata->name, ndev->name, IFNAMSIZ); 650 sdata->dev = ndev; 651 sdata->wpan_dev.wpan_phy = local->hw.phy; 652 sdata->local = local; 653 654 /* setup type-dependent data */ 655 ret = ieee802154_setup_sdata(sdata, type); 656 if (ret) 657 goto err; 658 659 ret = register_netdevice(ndev); 660 if (ret < 0) 661 goto err; 662 663 mutex_lock(&local->iflist_mtx); 664 list_add_tail_rcu(&sdata->list, &local->interfaces); 665 mutex_unlock(&local->iflist_mtx); 666 667 return ndev; 668 669 err: 670 free_netdev(ndev); 671 return ERR_PTR(ret); 672 } 673 674 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata) 675 { 676 ASSERT_RTNL(); 677 678 mutex_lock(&sdata->local->iflist_mtx); 679 list_del_rcu(&sdata->list); 680 mutex_unlock(&sdata->local->iflist_mtx); 681 682 synchronize_rcu(); 683 unregister_netdevice(sdata->dev); 684 } 685 686 void ieee802154_remove_interfaces(struct ieee802154_local *local) 687 { 688 struct ieee802154_sub_if_data *sdata, *tmp; 689 690 mutex_lock(&local->iflist_mtx); 691 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 692 list_del(&sdata->list); 693 694 unregister_netdevice(sdata->dev); 695 } 696 mutex_unlock(&local->iflist_mtx); 697 } 698 699 static int netdev_notify(struct notifier_block *nb, 700 unsigned long state, void *ptr) 701 { 702 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 703 struct ieee802154_sub_if_data *sdata; 704 705 if (state != NETDEV_CHANGENAME) 706 return NOTIFY_DONE; 707 708 if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy) 709 return NOTIFY_DONE; 710 711 if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid) 712 return NOTIFY_DONE; 713 714 sdata = IEEE802154_DEV_TO_SUB_IF(dev); 715 memcpy(sdata->name, dev->name, IFNAMSIZ); 716 717 return NOTIFY_OK; 718 } 719 720 static struct notifier_block mac802154_netdev_notifier = { 721 .notifier_call = netdev_notify, 722 }; 723 724 int ieee802154_iface_init(void) 725 { 726 return register_netdevice_notifier(&mac802154_netdev_notifier); 727 } 728 729 void ieee802154_iface_exit(void) 730 { 731 unregister_netdevice_notifier(&mac802154_netdev_notifier); 732 } 733