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 25int 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 48static int 49mac802154_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 111static 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 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 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 memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr, 140 dev->addr_len); 141 142 return mac802154_wpan_update_llsec(dev); 143} 144 145static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata) 146{ 147 struct ieee802154_local *local = sdata->local; 148 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 149 int ret; 150 151 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { 152 ret = drv_set_promiscuous_mode(local, 153 wpan_dev->promiscuous_mode); 154 if (ret < 0) 155 return ret; 156 } 157 158 if (local->hw.flags & IEEE802154_HW_AFILT) { 159 ret = drv_set_pan_id(local, wpan_dev->pan_id); 160 if (ret < 0) 161 return ret; 162 163 ret = drv_set_extended_addr(local, wpan_dev->extended_addr); 164 if (ret < 0) 165 return ret; 166 167 ret = drv_set_short_addr(local, wpan_dev->short_addr); 168 if (ret < 0) 169 return ret; 170 } 171 172 if (local->hw.flags & IEEE802154_HW_LBT) { 173 ret = drv_set_lbt_mode(local, wpan_dev->lbt); 174 if (ret < 0) 175 return ret; 176 } 177 178 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { 179 ret = drv_set_csma_params(local, wpan_dev->min_be, 180 wpan_dev->max_be, 181 wpan_dev->csma_retries); 182 if (ret < 0) 183 return ret; 184 } 185 186 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { 187 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries); 188 if (ret < 0) 189 return ret; 190 } 191 192 return 0; 193} 194 195static int mac802154_slave_open(struct net_device *dev) 196{ 197 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 198 struct ieee802154_local *local = sdata->local; 199 int res; 200 201 ASSERT_RTNL(); 202 203 set_bit(SDATA_STATE_RUNNING, &sdata->state); 204 205 if (!local->open_count) { 206 res = ieee802154_setup_hw(sdata); 207 if (res) 208 goto err; 209 210 res = drv_start(local); 211 if (res) 212 goto err; 213 } 214 215 local->open_count++; 216 netif_start_queue(dev); 217 return 0; 218err: 219 /* might already be clear but that doesn't matter */ 220 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 221 222 return res; 223} 224 225static int 226ieee802154_check_mac_settings(struct ieee802154_local *local, 227 struct wpan_dev *wpan_dev, 228 struct wpan_dev *nwpan_dev) 229{ 230 ASSERT_RTNL(); 231 232 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { 233 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode) 234 return -EBUSY; 235 } 236 237 if (local->hw.flags & IEEE802154_HW_AFILT) { 238 if (wpan_dev->pan_id != nwpan_dev->pan_id || 239 wpan_dev->short_addr != nwpan_dev->short_addr || 240 wpan_dev->extended_addr != nwpan_dev->extended_addr) 241 return -EBUSY; 242 } 243 244 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { 245 if (wpan_dev->min_be != nwpan_dev->min_be || 246 wpan_dev->max_be != nwpan_dev->max_be || 247 wpan_dev->csma_retries != nwpan_dev->csma_retries) 248 return -EBUSY; 249 } 250 251 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { 252 if (wpan_dev->frame_retries != nwpan_dev->frame_retries) 253 return -EBUSY; 254 } 255 256 if (local->hw.flags & IEEE802154_HW_LBT) { 257 if (wpan_dev->lbt != nwpan_dev->lbt) 258 return -EBUSY; 259 } 260 261 return 0; 262} 263 264static int 265ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata, 266 enum nl802154_iftype iftype) 267{ 268 struct ieee802154_local *local = sdata->local; 269 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 270 struct ieee802154_sub_if_data *nsdata; 271 272 /* we hold the RTNL here so can safely walk the list */ 273 list_for_each_entry(nsdata, &local->interfaces, list) { 274 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) { 275 int ret; 276 277 /* TODO currently we don't support multiple node types 278 * we need to run skb_clone at rx path. Check if there 279 * exist really an use case if we need to support 280 * multiple node types at the same time. 281 */ 282 if (wpan_dev->iftype == NL802154_IFTYPE_NODE && 283 nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE) 284 return -EBUSY; 285 286 /* check all phy mac sublayer settings are the same. 287 * We have only one phy, different values makes trouble. 288 */ 289 ret = ieee802154_check_mac_settings(local, wpan_dev, 290 &nsdata->wpan_dev); 291 if (ret < 0) 292 return ret; 293 } 294 } 295 296 return 0; 297} 298 299static int mac802154_wpan_open(struct net_device *dev) 300{ 301 int rc; 302 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 303 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 304 305 rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype); 306 if (rc < 0) 307 return rc; 308 309 return mac802154_slave_open(dev); 310} 311 312static int mac802154_slave_close(struct net_device *dev) 313{ 314 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 315 struct ieee802154_local *local = sdata->local; 316 317 ASSERT_RTNL(); 318 319 netif_stop_queue(dev); 320 local->open_count--; 321 322 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 323 324 if (!local->open_count) 325 ieee802154_stop_device(local); 326 327 return 0; 328} 329 330static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, 331 struct ieee802154_hdr *hdr, 332 const struct ieee802154_mac_cb *cb) 333{ 334 struct ieee802154_llsec_params params; 335 u8 level; 336 337 mac802154_llsec_get_params(&sdata->sec, ¶ms); 338 339 if (!params.enabled && cb->secen_override && cb->secen) 340 return -EINVAL; 341 if (!params.enabled || 342 (cb->secen_override && !cb->secen) || 343 !params.out_level) 344 return 0; 345 if (cb->seclevel_override && !cb->seclevel) 346 return -EINVAL; 347 348 level = cb->seclevel_override ? cb->seclevel : params.out_level; 349 350 hdr->fc.security_enabled = 1; 351 hdr->sec.level = level; 352 hdr->sec.key_id_mode = params.out_key.mode; 353 if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) 354 hdr->sec.short_src = params.out_key.short_source; 355 else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) 356 hdr->sec.extended_src = params.out_key.extended_source; 357 hdr->sec.key_id = params.out_key.id; 358 359 return 0; 360} 361 362static int ieee802154_header_create(struct sk_buff *skb, 363 struct net_device *dev, 364 const struct ieee802154_addr *daddr, 365 const struct ieee802154_addr *saddr, 366 unsigned len) 367{ 368 struct ieee802154_hdr hdr; 369 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 370 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 371 struct ieee802154_mac_cb *cb = mac_cb(skb); 372 int hlen; 373 374 if (!daddr) 375 return -EINVAL; 376 377 memset(&hdr.fc, 0, sizeof(hdr.fc)); 378 hdr.fc.type = cb->type; 379 hdr.fc.security_enabled = cb->secen; 380 hdr.fc.ack_request = cb->ackreq; 381 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; 382 383 if (mac802154_set_header_security(sdata, &hdr, cb) < 0) 384 return -EINVAL; 385 386 if (!saddr) { 387 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || 388 wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || 389 wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { 390 hdr.source.mode = IEEE802154_ADDR_LONG; 391 hdr.source.extended_addr = wpan_dev->extended_addr; 392 } else { 393 hdr.source.mode = IEEE802154_ADDR_SHORT; 394 hdr.source.short_addr = wpan_dev->short_addr; 395 } 396 397 hdr.source.pan_id = wpan_dev->pan_id; 398 } else { 399 hdr.source = *(const struct ieee802154_addr *)saddr; 400 } 401 402 hdr.dest = *(const struct ieee802154_addr *)daddr; 403 404 hlen = ieee802154_hdr_push(skb, &hdr); 405 if (hlen < 0) 406 return -EINVAL; 407 408 skb_reset_mac_header(skb); 409 skb->mac_len = hlen; 410 411 if (len > ieee802154_max_payload(&hdr)) 412 return -EMSGSIZE; 413 414 return hlen; 415} 416 417static const struct wpan_dev_header_ops ieee802154_header_ops = { 418 .create = ieee802154_header_create, 419}; 420 421/* This header create functionality assumes a 8 byte array for 422 * source and destination pointer at maximum. To adapt this for 423 * the 802.15.4 dataframe header we use extended address handling 424 * here only and intra pan connection. fc fields are mostly fallback 425 * handling. For provide dev_hard_header for dgram sockets. 426 */ 427static int mac802154_header_create(struct sk_buff *skb, 428 struct net_device *dev, 429 unsigned short type, 430 const void *daddr, 431 const void *saddr, 432 unsigned len) 433{ 434 struct ieee802154_hdr hdr; 435 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 436 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 437 struct ieee802154_mac_cb cb = { }; 438 int hlen; 439 440 if (!daddr) 441 return -EINVAL; 442 443 memset(&hdr.fc, 0, sizeof(hdr.fc)); 444 hdr.fc.type = IEEE802154_FC_TYPE_DATA; 445 hdr.fc.ack_request = wpan_dev->ackreq; 446 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; 447 448 /* TODO currently a workaround to give zero cb block to set 449 * security parameters defaults according MIB. 450 */ 451 if (mac802154_set_header_security(sdata, &hdr, &cb) < 0) 452 return -EINVAL; 453 454 hdr.dest.pan_id = wpan_dev->pan_id; 455 hdr.dest.mode = IEEE802154_ADDR_LONG; 456 ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr); 457 458 hdr.source.pan_id = hdr.dest.pan_id; 459 hdr.source.mode = IEEE802154_ADDR_LONG; 460 461 if (!saddr) 462 hdr.source.extended_addr = wpan_dev->extended_addr; 463 else 464 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr); 465 466 hlen = ieee802154_hdr_push(skb, &hdr); 467 if (hlen < 0) 468 return -EINVAL; 469 470 skb_reset_mac_header(skb); 471 skb->mac_len = hlen; 472 473 if (len > ieee802154_max_payload(&hdr)) 474 return -EMSGSIZE; 475 476 return hlen; 477} 478 479static int 480mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) 481{ 482 struct ieee802154_hdr hdr; 483 484 if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { 485 pr_debug("malformed packet\n"); 486 return 0; 487 } 488 489 if (hdr.source.mode == IEEE802154_ADDR_LONG) { 490 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr); 491 return IEEE802154_EXTENDED_ADDR_LEN; 492 } 493 494 return 0; 495} 496 497static const struct header_ops mac802154_header_ops = { 498 .create = mac802154_header_create, 499 .parse = mac802154_header_parse, 500}; 501 502static const struct net_device_ops mac802154_wpan_ops = { 503 .ndo_open = mac802154_wpan_open, 504 .ndo_stop = mac802154_slave_close, 505 .ndo_start_xmit = ieee802154_subif_start_xmit, 506 .ndo_do_ioctl = mac802154_wpan_ioctl, 507 .ndo_set_mac_address = mac802154_wpan_mac_addr, 508}; 509 510static const struct net_device_ops mac802154_monitor_ops = { 511 .ndo_open = mac802154_wpan_open, 512 .ndo_stop = mac802154_slave_close, 513 .ndo_start_xmit = ieee802154_monitor_start_xmit, 514}; 515 516static void mac802154_wpan_free(struct net_device *dev) 517{ 518 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); 519 520 mac802154_llsec_destroy(&sdata->sec); 521} 522 523static void ieee802154_if_setup(struct net_device *dev) 524{ 525 dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN; 526 memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN); 527 528 /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET 529 * will not send frames without any payload, but ack frames 530 * has no payload, so substract one that we can send a 3 bytes 531 * frame. The xmit callback assumes at least a hard header where two 532 * bytes fc and sequence field are set. 533 */ 534 dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1; 535 /* The auth_tag header is for security and places in private payload 536 * room of mac frame which stucks between payload and FCS field. 537 */ 538 dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN + 539 IEEE802154_FCS_LEN; 540 /* The mtu size is the payload without mac header in this case. 541 * We have a dynamic length header with a minimum header length 542 * which is hard_header_len. In this case we let mtu to the size 543 * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN - 544 * hard_header_len. The FCS which is set by hardware or ndo_start_xmit 545 * and the minimum mac header which can be evaluated inside driver 546 * layer. The rest of mac header will be part of payload if greater 547 * than hard_header_len. 548 */ 549 dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN - 550 dev->hard_header_len; 551 dev->tx_queue_len = 300; 552 dev->flags = IFF_NOARP | IFF_BROADCAST; 553} 554 555static int 556ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, 557 enum nl802154_iftype type) 558{ 559 struct wpan_dev *wpan_dev = &sdata->wpan_dev; 560 int ret; 561 u8 tmp; 562 563 /* set some type-dependent values */ 564 sdata->wpan_dev.iftype = type; 565 566 get_random_bytes(&tmp, sizeof(tmp)); 567 atomic_set(&wpan_dev->bsn, tmp); 568 get_random_bytes(&tmp, sizeof(tmp)); 569 atomic_set(&wpan_dev->dsn, tmp); 570 571 /* defaults per 802.15.4-2011 */ 572 wpan_dev->min_be = 3; 573 wpan_dev->max_be = 5; 574 wpan_dev->csma_retries = 4; 575 wpan_dev->frame_retries = 3; 576 577 wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); 578 wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); 579 580 switch (type) { 581 case NL802154_IFTYPE_NODE: 582 ieee802154_be64_to_le64(&wpan_dev->extended_addr, 583 sdata->dev->dev_addr); 584 585 sdata->dev->header_ops = &mac802154_header_ops; 586 sdata->dev->needs_free_netdev = true; 587 sdata->dev->priv_destructor = mac802154_wpan_free; 588 sdata->dev->netdev_ops = &mac802154_wpan_ops; 589 sdata->dev->ml_priv = &mac802154_mlme_wpan; 590 wpan_dev->promiscuous_mode = false; 591 wpan_dev->header_ops = &ieee802154_header_ops; 592 593 mutex_init(&sdata->sec_mtx); 594 595 mac802154_llsec_init(&sdata->sec); 596 ret = mac802154_wpan_update_llsec(sdata->dev); 597 if (ret < 0) 598 return ret; 599 600 break; 601 case NL802154_IFTYPE_MONITOR: 602 sdata->dev->needs_free_netdev = true; 603 sdata->dev->netdev_ops = &mac802154_monitor_ops; 604 wpan_dev->promiscuous_mode = true; 605 break; 606 default: 607 BUG(); 608 } 609 610 return 0; 611} 612 613struct net_device * 614ieee802154_if_add(struct ieee802154_local *local, const char *name, 615 unsigned char name_assign_type, enum nl802154_iftype type, 616 __le64 extended_addr) 617{ 618 struct net_device *ndev = NULL; 619 struct ieee802154_sub_if_data *sdata = NULL; 620 int ret = -ENOMEM; 621 622 ASSERT_RTNL(); 623 624 ndev = alloc_netdev(sizeof(*sdata), name, 625 name_assign_type, ieee802154_if_setup); 626 if (!ndev) 627 return ERR_PTR(-ENOMEM); 628 629 ndev->needed_headroom = local->hw.extra_tx_headroom + 630 IEEE802154_MAX_HEADER_LEN; 631 632 ret = dev_alloc_name(ndev, ndev->name); 633 if (ret < 0) 634 goto err; 635 636 ieee802154_le64_to_be64(ndev->perm_addr, 637 &local->hw.phy->perm_extended_addr); 638 switch (type) { 639 case NL802154_IFTYPE_NODE: 640 ndev->type = ARPHRD_IEEE802154; 641 if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) 642 ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr); 643 else 644 memcpy(ndev->dev_addr, ndev->perm_addr, 645 IEEE802154_EXTENDED_ADDR_LEN); 646 break; 647 case NL802154_IFTYPE_MONITOR: 648 ndev->type = ARPHRD_IEEE802154_MONITOR; 649 break; 650 default: 651 ret = -EINVAL; 652 goto err; 653 } 654 655 /* TODO check this */ 656 SET_NETDEV_DEV(ndev, &local->phy->dev); 657 dev_net_set(ndev, wpan_phy_net(local->hw.phy)); 658 sdata = netdev_priv(ndev); 659 ndev->ieee802154_ptr = &sdata->wpan_dev; 660 memcpy(sdata->name, ndev->name, IFNAMSIZ); 661 sdata->dev = ndev; 662 sdata->wpan_dev.wpan_phy = local->hw.phy; 663 sdata->local = local; 664 INIT_LIST_HEAD(&sdata->wpan_dev.list); 665 666 /* setup type-dependent data */ 667 ret = ieee802154_setup_sdata(sdata, type); 668 if (ret) 669 goto err; 670 671 ret = register_netdevice(ndev); 672 if (ret < 0) 673 goto err; 674 675 mutex_lock(&local->iflist_mtx); 676 list_add_tail_rcu(&sdata->list, &local->interfaces); 677 mutex_unlock(&local->iflist_mtx); 678 679 return ndev; 680 681err: 682 free_netdev(ndev); 683 return ERR_PTR(ret); 684} 685 686void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata) 687{ 688 ASSERT_RTNL(); 689 690 mutex_lock(&sdata->local->iflist_mtx); 691 list_del_rcu(&sdata->list); 692 mutex_unlock(&sdata->local->iflist_mtx); 693 694 synchronize_rcu(); 695 unregister_netdevice(sdata->dev); 696} 697 698void ieee802154_remove_interfaces(struct ieee802154_local *local) 699{ 700 struct ieee802154_sub_if_data *sdata, *tmp; 701 702 mutex_lock(&local->iflist_mtx); 703 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 704 list_del(&sdata->list); 705 706 unregister_netdevice(sdata->dev); 707 } 708 mutex_unlock(&local->iflist_mtx); 709} 710 711static int netdev_notify(struct notifier_block *nb, 712 unsigned long state, void *ptr) 713{ 714 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 715 struct ieee802154_sub_if_data *sdata; 716 717 if (state != NETDEV_CHANGENAME) 718 return NOTIFY_DONE; 719 720 if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy) 721 return NOTIFY_DONE; 722 723 if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid) 724 return NOTIFY_DONE; 725 726 sdata = IEEE802154_DEV_TO_SUB_IF(dev); 727 memcpy(sdata->name, dev->name, IFNAMSIZ); 728 729 return NOTIFY_OK; 730} 731 732static struct notifier_block mac802154_netdev_notifier = { 733 .notifier_call = netdev_notify, 734}; 735 736int ieee802154_iface_init(void) 737{ 738 return register_netdevice_notifier(&mac802154_netdev_notifier); 739} 740 741void ieee802154_iface_exit(void) 742{ 743 unregister_netdevice_notifier(&mac802154_netdev_notifier); 744} 745