1 /* 2 * Interface handling 3 * 4 * Copyright 2002-2005, Instant802 Networks, Inc. 5 * Copyright 2005-2006, Devicescape Software, Inc. 6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 8 * Copyright 2013-2014 Intel Mobile Communications GmbH 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 #include <linux/slab.h> 15 #include <linux/kernel.h> 16 #include <linux/if_arp.h> 17 #include <linux/netdevice.h> 18 #include <linux/rtnetlink.h> 19 #include <net/mac80211.h> 20 #include <net/ieee80211_radiotap.h> 21 #include "ieee80211_i.h" 22 #include "sta_info.h" 23 #include "debugfs_netdev.h" 24 #include "mesh.h" 25 #include "led.h" 26 #include "driver-ops.h" 27 #include "wme.h" 28 #include "rate.h" 29 30 /** 31 * DOC: Interface list locking 32 * 33 * The interface list in each struct ieee80211_local is protected 34 * three-fold: 35 * 36 * (1) modifications may only be done under the RTNL 37 * (2) modifications and readers are protected against each other by 38 * the iflist_mtx. 39 * (3) modifications are done in an RCU manner so atomic readers 40 * can traverse the list in RCU-safe blocks. 41 * 42 * As a consequence, reads (traversals) of the list can be protected 43 * by either the RTNL, the iflist_mtx or RCU. 44 */ 45 46 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 47 { 48 struct ieee80211_chanctx_conf *chanctx_conf; 49 int power; 50 51 rcu_read_lock(); 52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 53 if (!chanctx_conf) { 54 rcu_read_unlock(); 55 return false; 56 } 57 58 power = ieee80211_chandef_max_power(&chanctx_conf->def); 59 rcu_read_unlock(); 60 61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 62 power = min(power, sdata->user_power_level); 63 64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 65 power = min(power, sdata->ap_power_level); 66 67 if (power != sdata->vif.bss_conf.txpower) { 68 sdata->vif.bss_conf.txpower = power; 69 ieee80211_hw_config(sdata->local, 0); 70 return true; 71 } 72 73 return false; 74 } 75 76 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 77 bool update_bss) 78 { 79 if (__ieee80211_recalc_txpower(sdata) || 80 (update_bss && ieee80211_sdata_running(sdata))) 81 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 82 } 83 84 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 85 { 86 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 87 return 0; 88 89 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 90 return IEEE80211_CONF_CHANGE_IDLE; 91 } 92 93 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 94 { 95 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 96 return 0; 97 98 ieee80211_flush_queues(local, NULL, false); 99 100 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 101 return IEEE80211_CONF_CHANGE_IDLE; 102 } 103 104 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 105 bool force_active) 106 { 107 bool working, scanning, active; 108 unsigned int led_trig_start = 0, led_trig_stop = 0; 109 110 lockdep_assert_held(&local->mtx); 111 112 active = force_active || 113 !list_empty(&local->chanctx_list) || 114 local->monitors; 115 116 working = !local->ops->remain_on_channel && 117 !list_empty(&local->roc_list); 118 119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 121 122 if (working || scanning) 123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 124 else 125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 126 127 if (active) 128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 129 else 130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 131 132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 133 134 if (working || scanning || active) 135 return __ieee80211_idle_off(local); 136 return __ieee80211_idle_on(local); 137 } 138 139 u32 ieee80211_idle_off(struct ieee80211_local *local) 140 { 141 return __ieee80211_recalc_idle(local, true); 142 } 143 144 void ieee80211_recalc_idle(struct ieee80211_local *local) 145 { 146 u32 change = __ieee80211_recalc_idle(local, false); 147 if (change) 148 ieee80211_hw_config(local, change); 149 } 150 151 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) 152 { 153 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) 154 return -EINVAL; 155 156 dev->mtu = new_mtu; 157 return 0; 158 } 159 160 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 161 bool check_dup) 162 { 163 struct ieee80211_local *local = sdata->local; 164 struct ieee80211_sub_if_data *iter; 165 u64 new, mask, tmp; 166 u8 *m; 167 int ret = 0; 168 169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 170 return 0; 171 172 m = addr; 173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 176 177 m = local->hw.wiphy->addr_mask; 178 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 181 182 if (!check_dup) 183 return ret; 184 185 mutex_lock(&local->iflist_mtx); 186 list_for_each_entry(iter, &local->interfaces, list) { 187 if (iter == sdata) 188 continue; 189 190 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 191 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 192 continue; 193 194 m = iter->vif.addr; 195 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 198 199 if ((new & ~mask) != (tmp & ~mask)) { 200 ret = -EINVAL; 201 break; 202 } 203 } 204 mutex_unlock(&local->iflist_mtx); 205 206 return ret; 207 } 208 209 static int ieee80211_change_mac(struct net_device *dev, void *addr) 210 { 211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 212 struct sockaddr *sa = addr; 213 bool check_dup = true; 214 int ret; 215 216 if (ieee80211_sdata_running(sdata)) 217 return -EBUSY; 218 219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 220 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 221 check_dup = false; 222 223 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 224 if (ret) 225 return ret; 226 227 ret = eth_mac_addr(dev, sa); 228 229 if (ret == 0) 230 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 231 232 return ret; 233 } 234 235 static inline int identical_mac_addr_allowed(int type1, int type2) 236 { 237 return type1 == NL80211_IFTYPE_MONITOR || 238 type2 == NL80211_IFTYPE_MONITOR || 239 type1 == NL80211_IFTYPE_P2P_DEVICE || 240 type2 == NL80211_IFTYPE_P2P_DEVICE || 241 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 242 (type1 == NL80211_IFTYPE_WDS && 243 (type2 == NL80211_IFTYPE_WDS || 244 type2 == NL80211_IFTYPE_AP)) || 245 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 246 (type1 == NL80211_IFTYPE_AP_VLAN && 247 (type2 == NL80211_IFTYPE_AP || 248 type2 == NL80211_IFTYPE_AP_VLAN)); 249 } 250 251 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 252 enum nl80211_iftype iftype) 253 { 254 struct ieee80211_local *local = sdata->local; 255 struct ieee80211_sub_if_data *nsdata; 256 int ret; 257 258 ASSERT_RTNL(); 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 && ieee80211_sdata_running(nsdata)) { 263 /* 264 * Only OCB and monitor mode may coexist 265 */ 266 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 267 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 268 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 269 nsdata->vif.type == NL80211_IFTYPE_OCB)) 270 return -EBUSY; 271 272 /* 273 * Allow only a single IBSS interface to be up at any 274 * time. This is restricted because beacon distribution 275 * cannot work properly if both are in the same IBSS. 276 * 277 * To remove this restriction we'd have to disallow them 278 * from setting the same SSID on different IBSS interfaces 279 * belonging to the same hardware. Then, however, we're 280 * faced with having to adopt two different TSF timers... 281 */ 282 if (iftype == NL80211_IFTYPE_ADHOC && 283 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 284 return -EBUSY; 285 /* 286 * will not add another interface while any channel 287 * switch is active. 288 */ 289 if (nsdata->vif.csa_active) 290 return -EBUSY; 291 292 /* 293 * The remaining checks are only performed for interfaces 294 * with the same MAC address. 295 */ 296 if (!ether_addr_equal(sdata->vif.addr, 297 nsdata->vif.addr)) 298 continue; 299 300 /* 301 * check whether it may have the same address 302 */ 303 if (!identical_mac_addr_allowed(iftype, 304 nsdata->vif.type)) 305 return -ENOTUNIQ; 306 307 /* 308 * can only add VLANs to enabled APs 309 */ 310 if (iftype == NL80211_IFTYPE_AP_VLAN && 311 nsdata->vif.type == NL80211_IFTYPE_AP) 312 sdata->bss = &nsdata->u.ap; 313 } 314 } 315 316 mutex_lock(&local->chanctx_mtx); 317 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 318 mutex_unlock(&local->chanctx_mtx); 319 return ret; 320 } 321 322 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 323 enum nl80211_iftype iftype) 324 { 325 int n_queues = sdata->local->hw.queues; 326 int i; 327 328 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 329 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 331 IEEE80211_INVAL_HW_QUEUE)) 332 return -EINVAL; 333 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 334 n_queues)) 335 return -EINVAL; 336 } 337 } 338 339 if ((iftype != NL80211_IFTYPE_AP && 340 iftype != NL80211_IFTYPE_P2P_GO && 341 iftype != NL80211_IFTYPE_MESH_POINT) || 342 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 343 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 344 return 0; 345 } 346 347 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 348 return -EINVAL; 349 350 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 351 return -EINVAL; 352 353 return 0; 354 } 355 356 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 357 const int offset) 358 { 359 struct ieee80211_local *local = sdata->local; 360 u32 flags = sdata->u.mntr_flags; 361 362 #define ADJUST(_f, _s) do { \ 363 if (flags & MONITOR_FLAG_##_f) \ 364 local->fif_##_s += offset; \ 365 } while (0) 366 367 ADJUST(FCSFAIL, fcsfail); 368 ADJUST(PLCPFAIL, plcpfail); 369 ADJUST(CONTROL, control); 370 ADJUST(CONTROL, pspoll); 371 ADJUST(OTHER_BSS, other_bss); 372 373 #undef ADJUST 374 } 375 376 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 377 { 378 struct ieee80211_local *local = sdata->local; 379 int i; 380 381 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 382 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 383 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 384 else if (local->hw.queues >= IEEE80211_NUM_ACS) 385 sdata->vif.hw_queue[i] = i; 386 else 387 sdata->vif.hw_queue[i] = 0; 388 } 389 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 390 } 391 392 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 393 { 394 struct ieee80211_sub_if_data *sdata; 395 int ret; 396 397 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 398 return 0; 399 400 ASSERT_RTNL(); 401 402 if (local->monitor_sdata) 403 return 0; 404 405 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 406 if (!sdata) 407 return -ENOMEM; 408 409 /* set up data */ 410 sdata->local = local; 411 sdata->vif.type = NL80211_IFTYPE_MONITOR; 412 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 413 wiphy_name(local->hw.wiphy)); 414 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 415 416 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 417 418 ieee80211_set_default_queues(sdata); 419 420 ret = drv_add_interface(local, sdata); 421 if (WARN_ON(ret)) { 422 /* ok .. stupid driver, it asked for this! */ 423 kfree(sdata); 424 return ret; 425 } 426 427 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 428 if (ret) { 429 kfree(sdata); 430 return ret; 431 } 432 433 mutex_lock(&local->iflist_mtx); 434 rcu_assign_pointer(local->monitor_sdata, sdata); 435 mutex_unlock(&local->iflist_mtx); 436 437 mutex_lock(&local->mtx); 438 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 439 IEEE80211_CHANCTX_EXCLUSIVE); 440 mutex_unlock(&local->mtx); 441 if (ret) { 442 mutex_lock(&local->iflist_mtx); 443 RCU_INIT_POINTER(local->monitor_sdata, NULL); 444 mutex_unlock(&local->iflist_mtx); 445 synchronize_net(); 446 drv_remove_interface(local, sdata); 447 kfree(sdata); 448 return ret; 449 } 450 451 return 0; 452 } 453 454 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 455 { 456 struct ieee80211_sub_if_data *sdata; 457 458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 459 return; 460 461 ASSERT_RTNL(); 462 463 mutex_lock(&local->iflist_mtx); 464 465 sdata = rcu_dereference_protected(local->monitor_sdata, 466 lockdep_is_held(&local->iflist_mtx)); 467 if (!sdata) { 468 mutex_unlock(&local->iflist_mtx); 469 return; 470 } 471 472 RCU_INIT_POINTER(local->monitor_sdata, NULL); 473 mutex_unlock(&local->iflist_mtx); 474 475 synchronize_net(); 476 477 mutex_lock(&local->mtx); 478 ieee80211_vif_release_channel(sdata); 479 mutex_unlock(&local->mtx); 480 481 drv_remove_interface(local, sdata); 482 483 kfree(sdata); 484 } 485 486 /* 487 * NOTE: Be very careful when changing this function, it must NOT return 488 * an error on interface type changes that have been pre-checked, so most 489 * checks should be in ieee80211_check_concurrent_iface. 490 */ 491 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 492 { 493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 494 struct net_device *dev = wdev->netdev; 495 struct ieee80211_local *local = sdata->local; 496 struct sta_info *sta; 497 u32 changed = 0; 498 int res; 499 u32 hw_reconf_flags = 0; 500 501 switch (sdata->vif.type) { 502 case NL80211_IFTYPE_WDS: 503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 504 return -ENOLINK; 505 break; 506 case NL80211_IFTYPE_AP_VLAN: { 507 struct ieee80211_sub_if_data *master; 508 509 if (!sdata->bss) 510 return -ENOLINK; 511 512 mutex_lock(&local->mtx); 513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 514 mutex_unlock(&local->mtx); 515 516 master = container_of(sdata->bss, 517 struct ieee80211_sub_if_data, u.ap); 518 sdata->control_port_protocol = 519 master->control_port_protocol; 520 sdata->control_port_no_encrypt = 521 master->control_port_no_encrypt; 522 sdata->vif.cab_queue = master->vif.cab_queue; 523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 524 sizeof(sdata->vif.hw_queue)); 525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef; 526 527 mutex_lock(&local->key_mtx); 528 sdata->crypto_tx_tailroom_needed_cnt += 529 master->crypto_tx_tailroom_needed_cnt; 530 mutex_unlock(&local->key_mtx); 531 532 break; 533 } 534 case NL80211_IFTYPE_AP: 535 sdata->bss = &sdata->u.ap; 536 break; 537 case NL80211_IFTYPE_MESH_POINT: 538 case NL80211_IFTYPE_STATION: 539 case NL80211_IFTYPE_MONITOR: 540 case NL80211_IFTYPE_ADHOC: 541 case NL80211_IFTYPE_P2P_DEVICE: 542 case NL80211_IFTYPE_OCB: 543 /* no special treatment */ 544 break; 545 case NL80211_IFTYPE_UNSPECIFIED: 546 case NUM_NL80211_IFTYPES: 547 case NL80211_IFTYPE_P2P_CLIENT: 548 case NL80211_IFTYPE_P2P_GO: 549 /* cannot happen */ 550 WARN_ON(1); 551 break; 552 } 553 554 if (local->open_count == 0) { 555 res = drv_start(local); 556 if (res) 557 goto err_del_bss; 558 /* we're brought up, everything changes */ 559 hw_reconf_flags = ~0; 560 ieee80211_led_radio(local, true); 561 ieee80211_mod_tpt_led_trig(local, 562 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 563 } 564 565 /* 566 * Copy the hopefully now-present MAC address to 567 * this interface, if it has the special null one. 568 */ 569 if (dev && is_zero_ether_addr(dev->dev_addr)) { 570 memcpy(dev->dev_addr, 571 local->hw.wiphy->perm_addr, 572 ETH_ALEN); 573 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 574 575 if (!is_valid_ether_addr(dev->dev_addr)) { 576 res = -EADDRNOTAVAIL; 577 goto err_stop; 578 } 579 } 580 581 switch (sdata->vif.type) { 582 case NL80211_IFTYPE_AP_VLAN: 583 /* no need to tell driver, but set carrier and chanctx */ 584 if (rtnl_dereference(sdata->bss->beacon)) { 585 ieee80211_vif_vlan_copy_chanctx(sdata); 586 netif_carrier_on(dev); 587 } else { 588 netif_carrier_off(dev); 589 } 590 break; 591 case NL80211_IFTYPE_MONITOR: 592 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 593 local->cooked_mntrs++; 594 break; 595 } 596 597 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { 598 res = drv_add_interface(local, sdata); 599 if (res) 600 goto err_stop; 601 } else if (local->monitors == 0 && local->open_count == 0) { 602 res = ieee80211_add_virtual_monitor(local); 603 if (res) 604 goto err_stop; 605 } 606 607 /* must be before the call to ieee80211_configure_filter */ 608 local->monitors++; 609 if (local->monitors == 1) { 610 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 611 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 612 } 613 614 ieee80211_adjust_monitor_flags(sdata, 1); 615 ieee80211_configure_filter(local); 616 mutex_lock(&local->mtx); 617 ieee80211_recalc_idle(local); 618 mutex_unlock(&local->mtx); 619 620 netif_carrier_on(dev); 621 break; 622 default: 623 if (coming_up) { 624 ieee80211_del_virtual_monitor(local); 625 626 res = drv_add_interface(local, sdata); 627 if (res) 628 goto err_stop; 629 res = ieee80211_check_queues(sdata, 630 ieee80211_vif_type_p2p(&sdata->vif)); 631 if (res) 632 goto err_del_interface; 633 } 634 635 if (sdata->vif.type == NL80211_IFTYPE_AP) { 636 local->fif_pspoll++; 637 local->fif_probe_req++; 638 639 ieee80211_configure_filter(local); 640 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 641 local->fif_probe_req++; 642 } 643 644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 645 changed |= ieee80211_reset_erp_info(sdata); 646 ieee80211_bss_info_change_notify(sdata, changed); 647 648 switch (sdata->vif.type) { 649 case NL80211_IFTYPE_STATION: 650 case NL80211_IFTYPE_ADHOC: 651 case NL80211_IFTYPE_AP: 652 case NL80211_IFTYPE_MESH_POINT: 653 case NL80211_IFTYPE_OCB: 654 netif_carrier_off(dev); 655 break; 656 case NL80211_IFTYPE_WDS: 657 case NL80211_IFTYPE_P2P_DEVICE: 658 break; 659 default: 660 /* not reached */ 661 WARN_ON(1); 662 } 663 664 /* 665 * Set default queue parameters so drivers don't 666 * need to initialise the hardware if the hardware 667 * doesn't start up with sane defaults. 668 * Enable QoS for anything but station interfaces. 669 */ 670 ieee80211_set_wmm_default(sdata, true, 671 sdata->vif.type != NL80211_IFTYPE_STATION); 672 } 673 674 set_bit(SDATA_STATE_RUNNING, &sdata->state); 675 676 if (sdata->vif.type == NL80211_IFTYPE_WDS) { 677 /* Create STA entry for the WDS peer */ 678 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 679 GFP_KERNEL); 680 if (!sta) { 681 res = -ENOMEM; 682 goto err_del_interface; 683 } 684 685 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 686 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 688 689 res = sta_info_insert(sta); 690 if (res) { 691 /* STA has been freed */ 692 goto err_del_interface; 693 } 694 695 rate_control_rate_init(sta); 696 netif_carrier_on(dev); 697 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { 698 rcu_assign_pointer(local->p2p_sdata, sdata); 699 } 700 701 /* 702 * set_multicast_list will be invoked by the networking core 703 * which will check whether any increments here were done in 704 * error and sync them down to the hardware as filter flags. 705 */ 706 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 707 atomic_inc(&local->iff_allmultis); 708 709 if (coming_up) 710 local->open_count++; 711 712 if (hw_reconf_flags) 713 ieee80211_hw_config(local, hw_reconf_flags); 714 715 ieee80211_recalc_ps(local); 716 717 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 718 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 719 /* XXX: for AP_VLAN, actually track AP queues */ 720 netif_tx_start_all_queues(dev); 721 } else if (dev) { 722 unsigned long flags; 723 int n_acs = IEEE80211_NUM_ACS; 724 int ac; 725 726 if (local->hw.queues < IEEE80211_NUM_ACS) 727 n_acs = 1; 728 729 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 730 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 731 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 732 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 733 for (ac = 0; ac < n_acs; ac++) { 734 int ac_queue = sdata->vif.hw_queue[ac]; 735 736 if (local->queue_stop_reasons[ac_queue] == 0 && 737 skb_queue_empty(&local->pending[ac_queue])) 738 netif_start_subqueue(dev, ac); 739 } 740 } 741 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 742 } 743 744 return 0; 745 err_del_interface: 746 drv_remove_interface(local, sdata); 747 err_stop: 748 if (!local->open_count) 749 drv_stop(local); 750 err_del_bss: 751 sdata->bss = NULL; 752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 753 mutex_lock(&local->mtx); 754 list_del(&sdata->u.vlan.list); 755 mutex_unlock(&local->mtx); 756 } 757 /* might already be clear but that doesn't matter */ 758 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 759 return res; 760 } 761 762 static int ieee80211_open(struct net_device *dev) 763 { 764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 765 int err; 766 767 /* fail early if user set an invalid address */ 768 if (!is_valid_ether_addr(dev->dev_addr)) 769 return -EADDRNOTAVAIL; 770 771 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 772 if (err) 773 return err; 774 775 return ieee80211_do_open(&sdata->wdev, true); 776 } 777 778 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 779 bool going_down) 780 { 781 struct ieee80211_local *local = sdata->local; 782 unsigned long flags; 783 struct sk_buff *skb, *tmp; 784 u32 hw_reconf_flags = 0; 785 int i, flushed; 786 struct ps_data *ps; 787 struct cfg80211_chan_def chandef; 788 bool cancel_scan; 789 790 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 791 792 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 793 if (cancel_scan) 794 ieee80211_scan_cancel(local); 795 796 /* 797 * Stop TX on this interface first. 798 */ 799 if (sdata->dev) 800 netif_tx_stop_all_queues(sdata->dev); 801 802 ieee80211_roc_purge(local, sdata); 803 804 switch (sdata->vif.type) { 805 case NL80211_IFTYPE_STATION: 806 ieee80211_mgd_stop(sdata); 807 break; 808 case NL80211_IFTYPE_ADHOC: 809 ieee80211_ibss_stop(sdata); 810 break; 811 case NL80211_IFTYPE_AP: 812 cancel_work_sync(&sdata->u.ap.request_smps_work); 813 break; 814 default: 815 break; 816 } 817 818 /* 819 * Remove all stations associated with this interface. 820 * 821 * This must be done before calling ops->remove_interface() 822 * because otherwise we can later invoke ops->sta_notify() 823 * whenever the STAs are removed, and that invalidates driver 824 * assumptions about always getting a vif pointer that is valid 825 * (because if we remove a STA after ops->remove_interface() 826 * the driver will have removed the vif info already!) 827 * 828 * In WDS mode a station must exist here and be flushed, for 829 * AP_VLANs stations may exist since there's nothing else that 830 * would have removed them, but in other modes there shouldn't 831 * be any stations. 832 */ 833 flushed = sta_info_flush(sdata); 834 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 835 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 836 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 837 838 /* don't count this interface for allmulti while it is down */ 839 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 840 atomic_dec(&local->iff_allmultis); 841 842 if (sdata->vif.type == NL80211_IFTYPE_AP) { 843 local->fif_pspoll--; 844 local->fif_probe_req--; 845 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 846 local->fif_probe_req--; 847 } 848 849 if (sdata->dev) { 850 netif_addr_lock_bh(sdata->dev); 851 spin_lock_bh(&local->filter_lock); 852 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 853 sdata->dev->addr_len); 854 spin_unlock_bh(&local->filter_lock); 855 netif_addr_unlock_bh(sdata->dev); 856 } 857 858 del_timer_sync(&local->dynamic_ps_timer); 859 cancel_work_sync(&local->dynamic_ps_enable_work); 860 861 cancel_work_sync(&sdata->recalc_smps); 862 sdata_lock(sdata); 863 mutex_lock(&local->mtx); 864 sdata->vif.csa_active = false; 865 if (sdata->vif.type == NL80211_IFTYPE_STATION) 866 sdata->u.mgd.csa_waiting_bcn = false; 867 if (sdata->csa_block_tx) { 868 ieee80211_wake_vif_queues(local, sdata, 869 IEEE80211_QUEUE_STOP_REASON_CSA); 870 sdata->csa_block_tx = false; 871 } 872 mutex_unlock(&local->mtx); 873 sdata_unlock(sdata); 874 875 cancel_work_sync(&sdata->csa_finalize_work); 876 877 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 878 879 if (sdata->wdev.cac_started) { 880 chandef = sdata->vif.bss_conf.chandef; 881 WARN_ON(local->suspended); 882 mutex_lock(&local->mtx); 883 ieee80211_vif_release_channel(sdata); 884 mutex_unlock(&local->mtx); 885 cfg80211_cac_event(sdata->dev, &chandef, 886 NL80211_RADAR_CAC_ABORTED, 887 GFP_KERNEL); 888 } 889 890 /* APs need special treatment */ 891 if (sdata->vif.type == NL80211_IFTYPE_AP) { 892 struct ieee80211_sub_if_data *vlan, *tmpsdata; 893 894 /* down all dependent devices, that is VLANs */ 895 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 896 u.vlan.list) 897 dev_close(vlan->dev); 898 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 899 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 900 /* remove all packets in parent bc_buf pointing to this dev */ 901 ps = &sdata->bss->ps; 902 903 spin_lock_irqsave(&ps->bc_buf.lock, flags); 904 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 905 if (skb->dev == sdata->dev) { 906 __skb_unlink(skb, &ps->bc_buf); 907 local->total_ps_buffered--; 908 ieee80211_free_txskb(&local->hw, skb); 909 } 910 } 911 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 912 } 913 914 if (going_down) 915 local->open_count--; 916 917 switch (sdata->vif.type) { 918 case NL80211_IFTYPE_AP_VLAN: 919 mutex_lock(&local->mtx); 920 list_del(&sdata->u.vlan.list); 921 mutex_unlock(&local->mtx); 922 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 923 /* see comment in the default case below */ 924 ieee80211_free_keys(sdata, true); 925 /* no need to tell driver */ 926 break; 927 case NL80211_IFTYPE_MONITOR: 928 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { 929 local->cooked_mntrs--; 930 break; 931 } 932 933 local->monitors--; 934 if (local->monitors == 0) { 935 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 936 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 937 } 938 939 ieee80211_adjust_monitor_flags(sdata, -1); 940 break; 941 case NL80211_IFTYPE_P2P_DEVICE: 942 /* relies on synchronize_rcu() below */ 943 RCU_INIT_POINTER(local->p2p_sdata, NULL); 944 /* fall through */ 945 default: 946 cancel_work_sync(&sdata->work); 947 /* 948 * When we get here, the interface is marked down. 949 * Free the remaining keys, if there are any 950 * (which can happen in AP mode if userspace sets 951 * keys before the interface is operating, and maybe 952 * also in WDS mode) 953 * 954 * Force the key freeing to always synchronize_net() 955 * to wait for the RX path in case it is using this 956 * interface enqueuing frames at this very time on 957 * another CPU. 958 */ 959 ieee80211_free_keys(sdata, true); 960 skb_queue_purge(&sdata->skb_queue); 961 } 962 963 sdata->bss = NULL; 964 965 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 966 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 967 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 968 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 969 if (info->control.vif == &sdata->vif) { 970 __skb_unlink(skb, &local->pending[i]); 971 ieee80211_free_txskb(&local->hw, skb); 972 } 973 } 974 } 975 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 976 977 if (sdata->vif.txq) { 978 struct txq_info *txqi = to_txq_info(sdata->vif.txq); 979 980 ieee80211_purge_tx_queue(&local->hw, &txqi->queue); 981 atomic_set(&sdata->txqs_len[txqi->txq.ac], 0); 982 } 983 984 if (local->open_count == 0) 985 ieee80211_clear_tx_pending(local); 986 987 /* 988 * If the interface goes down while suspended, presumably because 989 * the device was unplugged and that happens before our resume, 990 * then the driver is already unconfigured and the remainder of 991 * this function isn't needed. 992 * XXX: what about WoWLAN? If the device has software state, e.g. 993 * memory allocated, it might expect teardown commands from 994 * mac80211 here? 995 */ 996 if (local->suspended) { 997 WARN_ON(local->wowlan); 998 WARN_ON(rtnl_dereference(local->monitor_sdata)); 999 return; 1000 } 1001 1002 switch (sdata->vif.type) { 1003 case NL80211_IFTYPE_AP_VLAN: 1004 break; 1005 case NL80211_IFTYPE_MONITOR: 1006 if (local->monitors == 0) 1007 ieee80211_del_virtual_monitor(local); 1008 1009 mutex_lock(&local->mtx); 1010 ieee80211_recalc_idle(local); 1011 mutex_unlock(&local->mtx); 1012 1013 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 1014 break; 1015 1016 /* fall through */ 1017 default: 1018 if (going_down) 1019 drv_remove_interface(local, sdata); 1020 } 1021 1022 ieee80211_recalc_ps(local); 1023 1024 if (cancel_scan) 1025 flush_delayed_work(&local->scan_work); 1026 1027 if (local->open_count == 0) { 1028 ieee80211_stop_device(local); 1029 1030 /* no reconfiguring after stop! */ 1031 return; 1032 } 1033 1034 /* do after stop to avoid reconfiguring when we stop anyway */ 1035 ieee80211_configure_filter(local); 1036 ieee80211_hw_config(local, hw_reconf_flags); 1037 1038 if (local->monitors == local->open_count) 1039 ieee80211_add_virtual_monitor(local); 1040 } 1041 1042 static int ieee80211_stop(struct net_device *dev) 1043 { 1044 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1045 1046 ieee80211_do_stop(sdata, true); 1047 1048 return 0; 1049 } 1050 1051 static void ieee80211_set_multicast_list(struct net_device *dev) 1052 { 1053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1054 struct ieee80211_local *local = sdata->local; 1055 int allmulti, sdata_allmulti; 1056 1057 allmulti = !!(dev->flags & IFF_ALLMULTI); 1058 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1059 1060 if (allmulti != sdata_allmulti) { 1061 if (dev->flags & IFF_ALLMULTI) 1062 atomic_inc(&local->iff_allmultis); 1063 else 1064 atomic_dec(&local->iff_allmultis); 1065 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1066 } 1067 1068 spin_lock_bh(&local->filter_lock); 1069 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1070 spin_unlock_bh(&local->filter_lock); 1071 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1072 } 1073 1074 /* 1075 * Called when the netdev is removed or, by the code below, before 1076 * the interface type changes. 1077 */ 1078 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1079 { 1080 int i; 1081 1082 /* free extra data */ 1083 ieee80211_free_keys(sdata, false); 1084 1085 ieee80211_debugfs_remove_netdev(sdata); 1086 1087 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1088 __skb_queue_purge(&sdata->fragments[i].skb_list); 1089 sdata->fragment_next = 0; 1090 1091 if (ieee80211_vif_is_mesh(&sdata->vif)) 1092 mesh_rmc_free(sdata); 1093 } 1094 1095 static void ieee80211_uninit(struct net_device *dev) 1096 { 1097 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1098 } 1099 1100 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1101 struct sk_buff *skb, 1102 void *accel_priv, 1103 select_queue_fallback_t fallback) 1104 { 1105 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1106 } 1107 1108 static struct rtnl_link_stats64 * 1109 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1110 { 1111 int i; 1112 1113 for_each_possible_cpu(i) { 1114 const struct pcpu_sw_netstats *tstats; 1115 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1116 unsigned int start; 1117 1118 tstats = per_cpu_ptr(dev->tstats, i); 1119 1120 do { 1121 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1122 rx_packets = tstats->rx_packets; 1123 tx_packets = tstats->tx_packets; 1124 rx_bytes = tstats->rx_bytes; 1125 tx_bytes = tstats->tx_bytes; 1126 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1127 1128 stats->rx_packets += rx_packets; 1129 stats->tx_packets += tx_packets; 1130 stats->rx_bytes += rx_bytes; 1131 stats->tx_bytes += tx_bytes; 1132 } 1133 1134 return stats; 1135 } 1136 1137 static const struct net_device_ops ieee80211_dataif_ops = { 1138 .ndo_open = ieee80211_open, 1139 .ndo_stop = ieee80211_stop, 1140 .ndo_uninit = ieee80211_uninit, 1141 .ndo_start_xmit = ieee80211_subif_start_xmit, 1142 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1143 .ndo_change_mtu = ieee80211_change_mtu, 1144 .ndo_set_mac_address = ieee80211_change_mac, 1145 .ndo_select_queue = ieee80211_netdev_select_queue, 1146 .ndo_get_stats64 = ieee80211_get_stats64, 1147 }; 1148 1149 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1150 struct sk_buff *skb, 1151 void *accel_priv, 1152 select_queue_fallback_t fallback) 1153 { 1154 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1155 struct ieee80211_local *local = sdata->local; 1156 struct ieee80211_hdr *hdr; 1157 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1158 1159 if (local->hw.queues < IEEE80211_NUM_ACS) 1160 return 0; 1161 1162 if (skb->len < 4 || 1163 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1164 return 0; /* doesn't matter, frame will be dropped */ 1165 1166 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1167 1168 return ieee80211_select_queue_80211(sdata, skb, hdr); 1169 } 1170 1171 static const struct net_device_ops ieee80211_monitorif_ops = { 1172 .ndo_open = ieee80211_open, 1173 .ndo_stop = ieee80211_stop, 1174 .ndo_uninit = ieee80211_uninit, 1175 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1176 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1177 .ndo_change_mtu = ieee80211_change_mtu, 1178 .ndo_set_mac_address = ieee80211_change_mac, 1179 .ndo_select_queue = ieee80211_monitor_select_queue, 1180 .ndo_get_stats64 = ieee80211_get_stats64, 1181 }; 1182 1183 static void ieee80211_if_free(struct net_device *dev) 1184 { 1185 free_percpu(dev->tstats); 1186 free_netdev(dev); 1187 } 1188 1189 static void ieee80211_if_setup(struct net_device *dev) 1190 { 1191 ether_setup(dev); 1192 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1193 dev->netdev_ops = &ieee80211_dataif_ops; 1194 dev->destructor = ieee80211_if_free; 1195 } 1196 1197 static void ieee80211_iface_work(struct work_struct *work) 1198 { 1199 struct ieee80211_sub_if_data *sdata = 1200 container_of(work, struct ieee80211_sub_if_data, work); 1201 struct ieee80211_local *local = sdata->local; 1202 struct sk_buff *skb; 1203 struct sta_info *sta; 1204 struct ieee80211_ra_tid *ra_tid; 1205 struct ieee80211_rx_agg *rx_agg; 1206 1207 if (!ieee80211_sdata_running(sdata)) 1208 return; 1209 1210 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1211 return; 1212 1213 if (!ieee80211_can_run_worker(local)) 1214 return; 1215 1216 /* first process frames */ 1217 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1218 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1219 1220 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) { 1221 ra_tid = (void *)&skb->cb; 1222 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, 1223 ra_tid->tid); 1224 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) { 1225 ra_tid = (void *)&skb->cb; 1226 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, 1227 ra_tid->tid); 1228 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) { 1229 rx_agg = (void *)&skb->cb; 1230 mutex_lock(&local->sta_mtx); 1231 sta = sta_info_get_bss(sdata, rx_agg->addr); 1232 if (sta) 1233 __ieee80211_start_rx_ba_session(sta, 1234 0, 0, 0, 1, rx_agg->tid, 1235 IEEE80211_MAX_AMPDU_BUF, 1236 false, true); 1237 mutex_unlock(&local->sta_mtx); 1238 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) { 1239 rx_agg = (void *)&skb->cb; 1240 mutex_lock(&local->sta_mtx); 1241 sta = sta_info_get_bss(sdata, rx_agg->addr); 1242 if (sta) 1243 __ieee80211_stop_rx_ba_session(sta, 1244 rx_agg->tid, 1245 WLAN_BACK_RECIPIENT, 0, 1246 false); 1247 mutex_unlock(&local->sta_mtx); 1248 } else if (ieee80211_is_action(mgmt->frame_control) && 1249 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1250 int len = skb->len; 1251 1252 mutex_lock(&local->sta_mtx); 1253 sta = sta_info_get_bss(sdata, mgmt->sa); 1254 if (sta) { 1255 switch (mgmt->u.action.u.addba_req.action_code) { 1256 case WLAN_ACTION_ADDBA_REQ: 1257 ieee80211_process_addba_request( 1258 local, sta, mgmt, len); 1259 break; 1260 case WLAN_ACTION_ADDBA_RESP: 1261 ieee80211_process_addba_resp(local, sta, 1262 mgmt, len); 1263 break; 1264 case WLAN_ACTION_DELBA: 1265 ieee80211_process_delba(sdata, sta, 1266 mgmt, len); 1267 break; 1268 default: 1269 WARN_ON(1); 1270 break; 1271 } 1272 } 1273 mutex_unlock(&local->sta_mtx); 1274 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1275 struct ieee80211_hdr *hdr = (void *)mgmt; 1276 /* 1277 * So the frame isn't mgmt, but frame_control 1278 * is at the right place anyway, of course, so 1279 * the if statement is correct. 1280 * 1281 * Warn if we have other data frame types here, 1282 * they must not get here. 1283 */ 1284 WARN_ON(hdr->frame_control & 1285 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1286 WARN_ON(!(hdr->seq_ctrl & 1287 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1288 /* 1289 * This was a fragment of a frame, received while 1290 * a block-ack session was active. That cannot be 1291 * right, so terminate the session. 1292 */ 1293 mutex_lock(&local->sta_mtx); 1294 sta = sta_info_get_bss(sdata, mgmt->sa); 1295 if (sta) { 1296 u16 tid = *ieee80211_get_qos_ctl(hdr) & 1297 IEEE80211_QOS_CTL_TID_MASK; 1298 1299 __ieee80211_stop_rx_ba_session( 1300 sta, tid, WLAN_BACK_RECIPIENT, 1301 WLAN_REASON_QSTA_REQUIRE_SETUP, 1302 true); 1303 } 1304 mutex_unlock(&local->sta_mtx); 1305 } else switch (sdata->vif.type) { 1306 case NL80211_IFTYPE_STATION: 1307 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1308 break; 1309 case NL80211_IFTYPE_ADHOC: 1310 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1311 break; 1312 case NL80211_IFTYPE_MESH_POINT: 1313 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1314 break; 1315 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1316 break; 1317 default: 1318 WARN(1, "frame for unexpected interface type"); 1319 break; 1320 } 1321 1322 kfree_skb(skb); 1323 } 1324 1325 /* then other type-dependent work */ 1326 switch (sdata->vif.type) { 1327 case NL80211_IFTYPE_STATION: 1328 ieee80211_sta_work(sdata); 1329 break; 1330 case NL80211_IFTYPE_ADHOC: 1331 ieee80211_ibss_work(sdata); 1332 break; 1333 case NL80211_IFTYPE_MESH_POINT: 1334 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1335 break; 1336 ieee80211_mesh_work(sdata); 1337 break; 1338 case NL80211_IFTYPE_OCB: 1339 ieee80211_ocb_work(sdata); 1340 break; 1341 default: 1342 break; 1343 } 1344 } 1345 1346 static void ieee80211_recalc_smps_work(struct work_struct *work) 1347 { 1348 struct ieee80211_sub_if_data *sdata = 1349 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1350 1351 ieee80211_recalc_smps(sdata); 1352 } 1353 1354 /* 1355 * Helper function to initialise an interface to a specific type. 1356 */ 1357 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1358 enum nl80211_iftype type) 1359 { 1360 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1361 0xff, 0xff, 0xff}; 1362 1363 /* clear type-dependent union */ 1364 memset(&sdata->u, 0, sizeof(sdata->u)); 1365 1366 /* and set some type-dependent values */ 1367 sdata->vif.type = type; 1368 sdata->vif.p2p = false; 1369 sdata->wdev.iftype = type; 1370 1371 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1372 sdata->control_port_no_encrypt = false; 1373 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1374 sdata->vif.bss_conf.idle = true; 1375 1376 sdata->noack_map = 0; 1377 1378 /* only monitor/p2p-device differ */ 1379 if (sdata->dev) { 1380 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1381 sdata->dev->type = ARPHRD_ETHER; 1382 } 1383 1384 skb_queue_head_init(&sdata->skb_queue); 1385 INIT_WORK(&sdata->work, ieee80211_iface_work); 1386 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1387 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1388 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1389 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1390 1391 switch (type) { 1392 case NL80211_IFTYPE_P2P_GO: 1393 type = NL80211_IFTYPE_AP; 1394 sdata->vif.type = type; 1395 sdata->vif.p2p = true; 1396 /* fall through */ 1397 case NL80211_IFTYPE_AP: 1398 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1399 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1400 INIT_WORK(&sdata->u.ap.request_smps_work, 1401 ieee80211_request_smps_ap_work); 1402 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1403 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1404 break; 1405 case NL80211_IFTYPE_P2P_CLIENT: 1406 type = NL80211_IFTYPE_STATION; 1407 sdata->vif.type = type; 1408 sdata->vif.p2p = true; 1409 /* fall through */ 1410 case NL80211_IFTYPE_STATION: 1411 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1412 ieee80211_sta_setup_sdata(sdata); 1413 break; 1414 case NL80211_IFTYPE_OCB: 1415 sdata->vif.bss_conf.bssid = bssid_wildcard; 1416 ieee80211_ocb_setup_sdata(sdata); 1417 break; 1418 case NL80211_IFTYPE_ADHOC: 1419 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1420 ieee80211_ibss_setup_sdata(sdata); 1421 break; 1422 case NL80211_IFTYPE_MESH_POINT: 1423 if (ieee80211_vif_is_mesh(&sdata->vif)) 1424 ieee80211_mesh_init_sdata(sdata); 1425 break; 1426 case NL80211_IFTYPE_MONITOR: 1427 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1428 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1429 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | 1430 MONITOR_FLAG_OTHER_BSS; 1431 break; 1432 case NL80211_IFTYPE_WDS: 1433 sdata->vif.bss_conf.bssid = NULL; 1434 break; 1435 case NL80211_IFTYPE_AP_VLAN: 1436 case NL80211_IFTYPE_P2P_DEVICE: 1437 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1438 break; 1439 case NL80211_IFTYPE_UNSPECIFIED: 1440 case NUM_NL80211_IFTYPES: 1441 BUG(); 1442 break; 1443 } 1444 1445 ieee80211_debugfs_add_netdev(sdata); 1446 } 1447 1448 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1449 enum nl80211_iftype type) 1450 { 1451 struct ieee80211_local *local = sdata->local; 1452 int ret, err; 1453 enum nl80211_iftype internal_type = type; 1454 bool p2p = false; 1455 1456 ASSERT_RTNL(); 1457 1458 if (!local->ops->change_interface) 1459 return -EBUSY; 1460 1461 switch (sdata->vif.type) { 1462 case NL80211_IFTYPE_AP: 1463 case NL80211_IFTYPE_STATION: 1464 case NL80211_IFTYPE_ADHOC: 1465 case NL80211_IFTYPE_OCB: 1466 /* 1467 * Could maybe also all others here? 1468 * Just not sure how that interacts 1469 * with the RX/config path e.g. for 1470 * mesh. 1471 */ 1472 break; 1473 default: 1474 return -EBUSY; 1475 } 1476 1477 switch (type) { 1478 case NL80211_IFTYPE_AP: 1479 case NL80211_IFTYPE_STATION: 1480 case NL80211_IFTYPE_ADHOC: 1481 case NL80211_IFTYPE_OCB: 1482 /* 1483 * Could probably support everything 1484 * but WDS here (WDS do_open can fail 1485 * under memory pressure, which this 1486 * code isn't prepared to handle). 1487 */ 1488 break; 1489 case NL80211_IFTYPE_P2P_CLIENT: 1490 p2p = true; 1491 internal_type = NL80211_IFTYPE_STATION; 1492 break; 1493 case NL80211_IFTYPE_P2P_GO: 1494 p2p = true; 1495 internal_type = NL80211_IFTYPE_AP; 1496 break; 1497 default: 1498 return -EBUSY; 1499 } 1500 1501 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1502 if (ret) 1503 return ret; 1504 1505 ieee80211_do_stop(sdata, false); 1506 1507 ieee80211_teardown_sdata(sdata); 1508 1509 ret = drv_change_interface(local, sdata, internal_type, p2p); 1510 if (ret) 1511 type = ieee80211_vif_type_p2p(&sdata->vif); 1512 1513 /* 1514 * Ignore return value here, there's not much we can do since 1515 * the driver changed the interface type internally already. 1516 * The warnings will hopefully make driver authors fix it :-) 1517 */ 1518 ieee80211_check_queues(sdata, type); 1519 1520 ieee80211_setup_sdata(sdata, type); 1521 1522 err = ieee80211_do_open(&sdata->wdev, false); 1523 WARN(err, "type change: do_open returned %d", err); 1524 1525 return ret; 1526 } 1527 1528 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1529 enum nl80211_iftype type) 1530 { 1531 int ret; 1532 1533 ASSERT_RTNL(); 1534 1535 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1536 return 0; 1537 1538 if (ieee80211_sdata_running(sdata)) { 1539 ret = ieee80211_runtime_change_iftype(sdata, type); 1540 if (ret) 1541 return ret; 1542 } else { 1543 /* Purge and reset type-dependent state. */ 1544 ieee80211_teardown_sdata(sdata); 1545 ieee80211_setup_sdata(sdata, type); 1546 } 1547 1548 /* reset some values that shouldn't be kept across type changes */ 1549 if (type == NL80211_IFTYPE_STATION) 1550 sdata->u.mgd.use_4addr = false; 1551 1552 return 0; 1553 } 1554 1555 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1556 u8 *perm_addr, enum nl80211_iftype type) 1557 { 1558 struct ieee80211_sub_if_data *sdata; 1559 u64 mask, start, addr, val, inc; 1560 u8 *m; 1561 u8 tmp_addr[ETH_ALEN]; 1562 int i; 1563 1564 /* default ... something at least */ 1565 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1566 1567 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1568 local->hw.wiphy->n_addresses <= 1) 1569 return; 1570 1571 mutex_lock(&local->iflist_mtx); 1572 1573 switch (type) { 1574 case NL80211_IFTYPE_MONITOR: 1575 /* doesn't matter */ 1576 break; 1577 case NL80211_IFTYPE_WDS: 1578 case NL80211_IFTYPE_AP_VLAN: 1579 /* match up with an AP interface */ 1580 list_for_each_entry(sdata, &local->interfaces, list) { 1581 if (sdata->vif.type != NL80211_IFTYPE_AP) 1582 continue; 1583 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1584 break; 1585 } 1586 /* keep default if no AP interface present */ 1587 break; 1588 case NL80211_IFTYPE_P2P_CLIENT: 1589 case NL80211_IFTYPE_P2P_GO: 1590 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1591 list_for_each_entry(sdata, &local->interfaces, list) { 1592 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1593 continue; 1594 if (!ieee80211_sdata_running(sdata)) 1595 continue; 1596 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1597 goto out_unlock; 1598 } 1599 } 1600 /* otherwise fall through */ 1601 default: 1602 /* assign a new address if possible -- try n_addresses first */ 1603 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1604 bool used = false; 1605 1606 list_for_each_entry(sdata, &local->interfaces, list) { 1607 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1608 sdata->vif.addr)) { 1609 used = true; 1610 break; 1611 } 1612 } 1613 1614 if (!used) { 1615 memcpy(perm_addr, 1616 local->hw.wiphy->addresses[i].addr, 1617 ETH_ALEN); 1618 break; 1619 } 1620 } 1621 1622 /* try mask if available */ 1623 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1624 break; 1625 1626 m = local->hw.wiphy->addr_mask; 1627 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1628 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1629 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1630 1631 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1632 /* not a contiguous mask ... not handled now! */ 1633 pr_info("not contiguous\n"); 1634 break; 1635 } 1636 1637 /* 1638 * Pick address of existing interface in case user changed 1639 * MAC address manually, default to perm_addr. 1640 */ 1641 m = local->hw.wiphy->perm_addr; 1642 list_for_each_entry(sdata, &local->interfaces, list) { 1643 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1644 continue; 1645 m = sdata->vif.addr; 1646 break; 1647 } 1648 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1649 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1650 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1651 1652 inc = 1ULL<<__ffs64(mask); 1653 val = (start & mask); 1654 addr = (start & ~mask) | (val & mask); 1655 do { 1656 bool used = false; 1657 1658 tmp_addr[5] = addr >> 0*8; 1659 tmp_addr[4] = addr >> 1*8; 1660 tmp_addr[3] = addr >> 2*8; 1661 tmp_addr[2] = addr >> 3*8; 1662 tmp_addr[1] = addr >> 4*8; 1663 tmp_addr[0] = addr >> 5*8; 1664 1665 val += inc; 1666 1667 list_for_each_entry(sdata, &local->interfaces, list) { 1668 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1669 used = true; 1670 break; 1671 } 1672 } 1673 1674 if (!used) { 1675 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1676 break; 1677 } 1678 addr = (start & ~mask) | (val & mask); 1679 } while (addr != start); 1680 1681 break; 1682 } 1683 1684 out_unlock: 1685 mutex_unlock(&local->iflist_mtx); 1686 } 1687 1688 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1689 unsigned char name_assign_type, 1690 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1691 struct vif_params *params) 1692 { 1693 struct net_device *ndev = NULL; 1694 struct ieee80211_sub_if_data *sdata = NULL; 1695 struct txq_info *txqi; 1696 int ret, i; 1697 int txqs = 1; 1698 1699 ASSERT_RTNL(); 1700 1701 if (type == NL80211_IFTYPE_P2P_DEVICE) { 1702 struct wireless_dev *wdev; 1703 1704 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1705 GFP_KERNEL); 1706 if (!sdata) 1707 return -ENOMEM; 1708 wdev = &sdata->wdev; 1709 1710 sdata->dev = NULL; 1711 strlcpy(sdata->name, name, IFNAMSIZ); 1712 ieee80211_assign_perm_addr(local, wdev->address, type); 1713 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1714 } else { 1715 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1716 sizeof(void *)); 1717 int txq_size = 0; 1718 1719 if (local->ops->wake_tx_queue) 1720 txq_size += sizeof(struct txq_info) + 1721 local->hw.txq_data_size; 1722 1723 if (local->hw.queues >= IEEE80211_NUM_ACS) 1724 txqs = IEEE80211_NUM_ACS; 1725 1726 ndev = alloc_netdev_mqs(size + txq_size, 1727 name, name_assign_type, 1728 ieee80211_if_setup, txqs, 1); 1729 if (!ndev) 1730 return -ENOMEM; 1731 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1732 1733 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1734 if (!ndev->tstats) { 1735 free_netdev(ndev); 1736 return -ENOMEM; 1737 } 1738 1739 ndev->needed_headroom = local->tx_headroom + 1740 4*6 /* four MAC addresses */ 1741 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1742 + 6 /* mesh */ 1743 + 8 /* rfc1042/bridge tunnel */ 1744 - ETH_HLEN /* ethernet hard_header_len */ 1745 + IEEE80211_ENCRYPT_HEADROOM; 1746 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1747 1748 ret = dev_alloc_name(ndev, ndev->name); 1749 if (ret < 0) { 1750 free_netdev(ndev); 1751 return ret; 1752 } 1753 1754 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1755 if (params && is_valid_ether_addr(params->macaddr)) 1756 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1757 else 1758 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1759 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1760 1761 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1762 sdata = netdev_priv(ndev); 1763 ndev->ieee80211_ptr = &sdata->wdev; 1764 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1765 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1766 1767 if (txq_size) { 1768 txqi = netdev_priv(ndev) + size; 1769 ieee80211_init_tx_queue(sdata, NULL, txqi, 0); 1770 } 1771 1772 sdata->dev = ndev; 1773 } 1774 1775 /* initialise type-independent data */ 1776 sdata->wdev.wiphy = local->hw.wiphy; 1777 sdata->local = local; 1778 1779 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1780 skb_queue_head_init(&sdata->fragments[i].skb_list); 1781 1782 INIT_LIST_HEAD(&sdata->key_list); 1783 1784 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1785 ieee80211_dfs_cac_timer_work); 1786 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1787 ieee80211_delayed_tailroom_dec); 1788 1789 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1790 struct ieee80211_supported_band *sband; 1791 sband = local->hw.wiphy->bands[i]; 1792 sdata->rc_rateidx_mask[i] = 1793 sband ? (1 << sband->n_bitrates) - 1 : 0; 1794 if (sband) { 1795 __le16 cap; 1796 u16 *vht_rate_mask; 1797 1798 memcpy(sdata->rc_rateidx_mcs_mask[i], 1799 sband->ht_cap.mcs.rx_mask, 1800 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1801 1802 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1803 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1804 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1805 } else { 1806 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1807 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1808 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1809 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1810 } 1811 } 1812 1813 ieee80211_set_default_queues(sdata); 1814 1815 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1816 sdata->user_power_level = local->user_power_level; 1817 1818 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1819 1820 /* setup type-dependent data */ 1821 ieee80211_setup_sdata(sdata, type); 1822 1823 if (ndev) { 1824 if (params) { 1825 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1826 if (type == NL80211_IFTYPE_STATION) 1827 sdata->u.mgd.use_4addr = params->use_4addr; 1828 } 1829 1830 ndev->features |= local->hw.netdev_features; 1831 1832 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1833 1834 ret = register_netdevice(ndev); 1835 if (ret) { 1836 free_netdev(ndev); 1837 return ret; 1838 } 1839 } 1840 1841 mutex_lock(&local->iflist_mtx); 1842 list_add_tail_rcu(&sdata->list, &local->interfaces); 1843 mutex_unlock(&local->iflist_mtx); 1844 1845 if (new_wdev) 1846 *new_wdev = &sdata->wdev; 1847 1848 return 0; 1849 } 1850 1851 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1852 { 1853 ASSERT_RTNL(); 1854 1855 mutex_lock(&sdata->local->iflist_mtx); 1856 list_del_rcu(&sdata->list); 1857 mutex_unlock(&sdata->local->iflist_mtx); 1858 1859 synchronize_rcu(); 1860 1861 if (sdata->dev) { 1862 unregister_netdevice(sdata->dev); 1863 } else { 1864 cfg80211_unregister_wdev(&sdata->wdev); 1865 ieee80211_teardown_sdata(sdata); 1866 kfree(sdata); 1867 } 1868 } 1869 1870 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1871 { 1872 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1873 return; 1874 ieee80211_do_stop(sdata, true); 1875 } 1876 1877 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1878 { 1879 struct ieee80211_sub_if_data *sdata, *tmp; 1880 LIST_HEAD(unreg_list); 1881 LIST_HEAD(wdev_list); 1882 1883 ASSERT_RTNL(); 1884 1885 /* Before destroying the interfaces, make sure they're all stopped so 1886 * that the hardware is stopped. Otherwise, the driver might still be 1887 * iterating the interfaces during the shutdown, e.g. from a worker 1888 * or from RX processing or similar, and if it does so (using atomic 1889 * iteration) while we're manipulating the list, the iteration will 1890 * crash. 1891 * 1892 * After this, the hardware should be stopped and the driver should 1893 * have stopped all of its activities, so that we can do RCU-unaware 1894 * manipulations of the interface list below. 1895 */ 1896 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1897 1898 WARN(local->open_count, "%s: open count remains %d\n", 1899 wiphy_name(local->hw.wiphy), local->open_count); 1900 1901 mutex_lock(&local->iflist_mtx); 1902 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1903 list_del(&sdata->list); 1904 1905 if (sdata->dev) 1906 unregister_netdevice_queue(sdata->dev, &unreg_list); 1907 else 1908 list_add(&sdata->list, &wdev_list); 1909 } 1910 mutex_unlock(&local->iflist_mtx); 1911 unregister_netdevice_many(&unreg_list); 1912 1913 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1914 list_del(&sdata->list); 1915 cfg80211_unregister_wdev(&sdata->wdev); 1916 kfree(sdata); 1917 } 1918 } 1919 1920 static int netdev_notify(struct notifier_block *nb, 1921 unsigned long state, void *ptr) 1922 { 1923 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1924 struct ieee80211_sub_if_data *sdata; 1925 1926 if (state != NETDEV_CHANGENAME) 1927 return NOTIFY_DONE; 1928 1929 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1930 return NOTIFY_DONE; 1931 1932 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1933 return NOTIFY_DONE; 1934 1935 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1936 memcpy(sdata->name, dev->name, IFNAMSIZ); 1937 ieee80211_debugfs_rename_netdev(sdata); 1938 1939 return NOTIFY_OK; 1940 } 1941 1942 static struct notifier_block mac80211_netdev_notifier = { 1943 .notifier_call = netdev_notify, 1944 }; 1945 1946 int ieee80211_iface_init(void) 1947 { 1948 return register_netdevice_notifier(&mac80211_netdev_notifier); 1949 } 1950 1951 void ieee80211_iface_exit(void) 1952 { 1953 unregister_netdevice_notifier(&mac80211_netdev_notifier); 1954 } 1955