1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Interface handling 4 * 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (c) 2016 Intel Deutschland GmbH 11 * Copyright (C) 2018 Intel Corporation 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <net/mac80211.h> 19 #include <net/ieee80211_radiotap.h> 20 #include "ieee80211_i.h" 21 #include "sta_info.h" 22 #include "debugfs_netdev.h" 23 #include "mesh.h" 24 #include "led.h" 25 #include "driver-ops.h" 26 #include "wme.h" 27 #include "rate.h" 28 29 /** 30 * DOC: Interface list locking 31 * 32 * The interface list in each struct ieee80211_local is protected 33 * three-fold: 34 * 35 * (1) modifications may only be done under the RTNL 36 * (2) modifications and readers are protected against each other by 37 * the iflist_mtx. 38 * (3) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the iflist_mtx or RCU. 43 */ 44 45 static void ieee80211_iface_work(struct work_struct *work); 46 47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) 48 { 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 54 if (!chanctx_conf) { 55 rcu_read_unlock(); 56 return false; 57 } 58 59 power = ieee80211_chandef_max_power(&chanctx_conf->def); 60 rcu_read_unlock(); 61 62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, sdata->user_power_level); 64 65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, sdata->ap_power_level); 67 68 if (power != sdata->vif.bss_conf.txpower) { 69 sdata->vif.bss_conf.txpower = power; 70 ieee80211_hw_config(sdata->local, 0); 71 return true; 72 } 73 74 return false; 75 } 76 77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata, 78 bool update_bss) 79 { 80 if (__ieee80211_recalc_txpower(sdata) || 81 (update_bss && ieee80211_sdata_running(sdata))) 82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); 83 } 84 85 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 86 { 87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 88 return 0; 89 90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 91 return IEEE80211_CONF_CHANGE_IDLE; 92 } 93 94 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 95 { 96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 97 return 0; 98 99 ieee80211_flush_queues(local, NULL, false); 100 101 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 102 return IEEE80211_CONF_CHANGE_IDLE; 103 } 104 105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 106 bool force_active) 107 { 108 bool working, scanning, active; 109 unsigned int led_trig_start = 0, led_trig_stop = 0; 110 111 lockdep_assert_held(&local->mtx); 112 113 active = force_active || 114 !list_empty(&local->chanctx_list) || 115 local->monitors; 116 117 working = !local->ops->remain_on_channel && 118 !list_empty(&local->roc_list); 119 120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 122 123 if (working || scanning) 124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 125 else 126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 127 128 if (active) 129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 130 else 131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 132 133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 134 135 if (working || scanning || active) 136 return __ieee80211_idle_off(local); 137 return __ieee80211_idle_on(local); 138 } 139 140 u32 ieee80211_idle_off(struct ieee80211_local *local) 141 { 142 return __ieee80211_recalc_idle(local, true); 143 } 144 145 void ieee80211_recalc_idle(struct ieee80211_local *local) 146 { 147 u32 change = __ieee80211_recalc_idle(local, false); 148 if (change) 149 ieee80211_hw_config(local, change); 150 } 151 152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 153 bool check_dup) 154 { 155 struct ieee80211_local *local = sdata->local; 156 struct ieee80211_sub_if_data *iter; 157 u64 new, mask, tmp; 158 u8 *m; 159 int ret = 0; 160 161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 162 return 0; 163 164 m = addr; 165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 168 169 m = local->hw.wiphy->addr_mask; 170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 173 174 if (!check_dup) 175 return ret; 176 177 mutex_lock(&local->iflist_mtx); 178 list_for_each_entry(iter, &local->interfaces, list) { 179 if (iter == sdata) 180 continue; 181 182 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 184 continue; 185 186 m = iter->vif.addr; 187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 190 191 if ((new & ~mask) != (tmp & ~mask)) { 192 ret = -EINVAL; 193 break; 194 } 195 } 196 mutex_unlock(&local->iflist_mtx); 197 198 return ret; 199 } 200 201 static int ieee80211_change_mac(struct net_device *dev, void *addr) 202 { 203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 204 struct sockaddr *sa = addr; 205 bool check_dup = true; 206 int ret; 207 208 if (ieee80211_sdata_running(sdata)) 209 return -EBUSY; 210 211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 213 check_dup = false; 214 215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 216 if (ret) 217 return ret; 218 219 ret = eth_mac_addr(dev, sa); 220 221 if (ret == 0) 222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 223 224 return ret; 225 } 226 227 static inline int identical_mac_addr_allowed(int type1, int type2) 228 { 229 return type1 == NL80211_IFTYPE_MONITOR || 230 type2 == NL80211_IFTYPE_MONITOR || 231 type1 == NL80211_IFTYPE_P2P_DEVICE || 232 type2 == NL80211_IFTYPE_P2P_DEVICE || 233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || 234 (type1 == NL80211_IFTYPE_WDS && 235 (type2 == NL80211_IFTYPE_WDS || 236 type2 == NL80211_IFTYPE_AP)) || 237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 238 (type1 == NL80211_IFTYPE_AP_VLAN && 239 (type2 == NL80211_IFTYPE_AP || 240 type2 == NL80211_IFTYPE_AP_VLAN)); 241 } 242 243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 244 enum nl80211_iftype iftype) 245 { 246 struct ieee80211_local *local = sdata->local; 247 struct ieee80211_sub_if_data *nsdata; 248 int ret; 249 250 ASSERT_RTNL(); 251 252 /* we hold the RTNL here so can safely walk the list */ 253 list_for_each_entry(nsdata, &local->interfaces, list) { 254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 255 /* 256 * Only OCB and monitor mode may coexist 257 */ 258 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 260 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 261 nsdata->vif.type == NL80211_IFTYPE_OCB)) 262 return -EBUSY; 263 264 /* 265 * Allow only a single IBSS interface to be up at any 266 * time. This is restricted because beacon distribution 267 * cannot work properly if both are in the same IBSS. 268 * 269 * To remove this restriction we'd have to disallow them 270 * from setting the same SSID on different IBSS interfaces 271 * belonging to the same hardware. Then, however, we're 272 * faced with having to adopt two different TSF timers... 273 */ 274 if (iftype == NL80211_IFTYPE_ADHOC && 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 276 return -EBUSY; 277 /* 278 * will not add another interface while any channel 279 * switch is active. 280 */ 281 if (nsdata->vif.csa_active) 282 return -EBUSY; 283 284 /* 285 * The remaining checks are only performed for interfaces 286 * with the same MAC address. 287 */ 288 if (!ether_addr_equal(sdata->vif.addr, 289 nsdata->vif.addr)) 290 continue; 291 292 /* 293 * check whether it may have the same address 294 */ 295 if (!identical_mac_addr_allowed(iftype, 296 nsdata->vif.type)) 297 return -ENOTUNIQ; 298 299 /* 300 * can only add VLANs to enabled APs 301 */ 302 if (iftype == NL80211_IFTYPE_AP_VLAN && 303 nsdata->vif.type == NL80211_IFTYPE_AP) 304 sdata->bss = &nsdata->u.ap; 305 } 306 } 307 308 mutex_lock(&local->chanctx_mtx); 309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0); 310 mutex_unlock(&local->chanctx_mtx); 311 return ret; 312 } 313 314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 315 enum nl80211_iftype iftype) 316 { 317 int n_queues = sdata->local->hw.queues; 318 int i; 319 320 if (iftype == NL80211_IFTYPE_NAN) 321 return 0; 322 323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 324 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 326 IEEE80211_INVAL_HW_QUEUE)) 327 return -EINVAL; 328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 329 n_queues)) 330 return -EINVAL; 331 } 332 } 333 334 if ((iftype != NL80211_IFTYPE_AP && 335 iftype != NL80211_IFTYPE_P2P_GO && 336 iftype != NL80211_IFTYPE_MESH_POINT) || 337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 339 return 0; 340 } 341 342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 343 return -EINVAL; 344 345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 346 return -EINVAL; 347 348 return 0; 349 } 350 351 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 352 const int offset) 353 { 354 struct ieee80211_local *local = sdata->local; 355 u32 flags = sdata->u.mntr.flags; 356 357 #define ADJUST(_f, _s) do { \ 358 if (flags & MONITOR_FLAG_##_f) \ 359 local->fif_##_s += offset; \ 360 } while (0) 361 362 ADJUST(FCSFAIL, fcsfail); 363 ADJUST(PLCPFAIL, plcpfail); 364 ADJUST(CONTROL, control); 365 ADJUST(CONTROL, pspoll); 366 ADJUST(OTHER_BSS, other_bss); 367 368 #undef ADJUST 369 } 370 371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 372 { 373 struct ieee80211_local *local = sdata->local; 374 int i; 375 376 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 379 else if (local->hw.queues >= IEEE80211_NUM_ACS) 380 sdata->vif.hw_queue[i] = i; 381 else 382 sdata->vif.hw_queue[i] = 0; 383 } 384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 385 } 386 387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local) 388 { 389 struct ieee80211_sub_if_data *sdata; 390 int ret; 391 392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 393 return 0; 394 395 ASSERT_RTNL(); 396 397 if (local->monitor_sdata) 398 return 0; 399 400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 401 if (!sdata) 402 return -ENOMEM; 403 404 /* set up data */ 405 sdata->local = local; 406 sdata->vif.type = NL80211_IFTYPE_MONITOR; 407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 408 wiphy_name(local->hw.wiphy)); 409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 410 411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 412 413 ieee80211_set_default_queues(sdata); 414 415 ret = drv_add_interface(local, sdata); 416 if (WARN_ON(ret)) { 417 /* ok .. stupid driver, it asked for this! */ 418 kfree(sdata); 419 return ret; 420 } 421 422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 423 if (ret) { 424 kfree(sdata); 425 return ret; 426 } 427 428 mutex_lock(&local->iflist_mtx); 429 rcu_assign_pointer(local->monitor_sdata, sdata); 430 mutex_unlock(&local->iflist_mtx); 431 432 mutex_lock(&local->mtx); 433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, 434 IEEE80211_CHANCTX_EXCLUSIVE); 435 mutex_unlock(&local->mtx); 436 if (ret) { 437 mutex_lock(&local->iflist_mtx); 438 RCU_INIT_POINTER(local->monitor_sdata, NULL); 439 mutex_unlock(&local->iflist_mtx); 440 synchronize_net(); 441 drv_remove_interface(local, sdata); 442 kfree(sdata); 443 return ret; 444 } 445 446 skb_queue_head_init(&sdata->skb_queue); 447 INIT_WORK(&sdata->work, ieee80211_iface_work); 448 449 return 0; 450 } 451 452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 453 { 454 struct ieee80211_sub_if_data *sdata; 455 456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 457 return; 458 459 ASSERT_RTNL(); 460 461 mutex_lock(&local->iflist_mtx); 462 463 sdata = rcu_dereference_protected(local->monitor_sdata, 464 lockdep_is_held(&local->iflist_mtx)); 465 if (!sdata) { 466 mutex_unlock(&local->iflist_mtx); 467 return; 468 } 469 470 RCU_INIT_POINTER(local->monitor_sdata, NULL); 471 mutex_unlock(&local->iflist_mtx); 472 473 synchronize_net(); 474 475 mutex_lock(&local->mtx); 476 ieee80211_vif_release_channel(sdata); 477 mutex_unlock(&local->mtx); 478 479 drv_remove_interface(local, sdata); 480 481 kfree(sdata); 482 } 483 484 /* 485 * NOTE: Be very careful when changing this function, it must NOT return 486 * an error on interface type changes that have been pre-checked, so most 487 * checks should be in ieee80211_check_concurrent_iface. 488 */ 489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 490 { 491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 492 struct net_device *dev = wdev->netdev; 493 struct ieee80211_local *local = sdata->local; 494 struct sta_info *sta; 495 u32 changed = 0; 496 int res; 497 u32 hw_reconf_flags = 0; 498 499 switch (sdata->vif.type) { 500 case NL80211_IFTYPE_WDS: 501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) 502 return -ENOLINK; 503 break; 504 case NL80211_IFTYPE_AP_VLAN: { 505 struct ieee80211_sub_if_data *master; 506 507 if (!sdata->bss) 508 return -ENOLINK; 509 510 mutex_lock(&local->mtx); 511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 512 mutex_unlock(&local->mtx); 513 514 master = container_of(sdata->bss, 515 struct ieee80211_sub_if_data, u.ap); 516 sdata->control_port_protocol = 517 master->control_port_protocol; 518 sdata->control_port_no_encrypt = 519 master->control_port_no_encrypt; 520 sdata->control_port_over_nl80211 = 521 master->control_port_over_nl80211; 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 case NL80211_IFTYPE_NAN: 544 /* no special treatment */ 545 break; 546 case NL80211_IFTYPE_UNSPECIFIED: 547 case NUM_NL80211_IFTYPES: 548 case NL80211_IFTYPE_P2P_CLIENT: 549 case NL80211_IFTYPE_P2P_GO: 550 /* cannot happen */ 551 WARN_ON(1); 552 break; 553 } 554 555 if (local->open_count == 0) { 556 res = drv_start(local); 557 if (res) 558 goto err_del_bss; 559 /* we're brought up, everything changes */ 560 hw_reconf_flags = ~0; 561 ieee80211_led_radio(local, true); 562 ieee80211_mod_tpt_led_trig(local, 563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 564 } 565 566 /* 567 * Copy the hopefully now-present MAC address to 568 * this interface, if it has the special null one. 569 */ 570 if (dev && is_zero_ether_addr(dev->dev_addr)) { 571 memcpy(dev->dev_addr, 572 local->hw.wiphy->perm_addr, 573 ETH_ALEN); 574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 575 576 if (!is_valid_ether_addr(dev->dev_addr)) { 577 res = -EADDRNOTAVAIL; 578 goto err_stop; 579 } 580 } 581 582 switch (sdata->vif.type) { 583 case NL80211_IFTYPE_AP_VLAN: 584 /* no need to tell driver, but set carrier and chanctx */ 585 if (rtnl_dereference(sdata->bss->beacon)) { 586 ieee80211_vif_vlan_copy_chanctx(sdata); 587 netif_carrier_on(dev); 588 } else { 589 netif_carrier_off(dev); 590 } 591 break; 592 case NL80211_IFTYPE_MONITOR: 593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 594 local->cooked_mntrs++; 595 break; 596 } 597 598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { 599 res = drv_add_interface(local, sdata); 600 if (res) 601 goto err_stop; 602 } else if (local->monitors == 0 && local->open_count == 0) { 603 res = ieee80211_add_virtual_monitor(local); 604 if (res) 605 goto err_stop; 606 } 607 608 /* must be before the call to ieee80211_configure_filter */ 609 local->monitors++; 610 if (local->monitors == 1) { 611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 613 } 614 615 ieee80211_adjust_monitor_flags(sdata, 1); 616 ieee80211_configure_filter(local); 617 mutex_lock(&local->mtx); 618 ieee80211_recalc_idle(local); 619 mutex_unlock(&local->mtx); 620 621 netif_carrier_on(dev); 622 break; 623 default: 624 if (coming_up) { 625 ieee80211_del_virtual_monitor(local); 626 627 res = drv_add_interface(local, sdata); 628 if (res) 629 goto err_stop; 630 res = ieee80211_check_queues(sdata, 631 ieee80211_vif_type_p2p(&sdata->vif)); 632 if (res) 633 goto err_del_interface; 634 } 635 636 if (sdata->vif.type == NL80211_IFTYPE_AP) { 637 local->fif_pspoll++; 638 local->fif_probe_req++; 639 640 ieee80211_configure_filter(local); 641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 642 local->fif_probe_req++; 643 } 644 645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 646 sdata->vif.type != NL80211_IFTYPE_NAN) 647 changed |= ieee80211_reset_erp_info(sdata); 648 ieee80211_bss_info_change_notify(sdata, changed); 649 650 switch (sdata->vif.type) { 651 case NL80211_IFTYPE_STATION: 652 case NL80211_IFTYPE_ADHOC: 653 case NL80211_IFTYPE_AP: 654 case NL80211_IFTYPE_MESH_POINT: 655 case NL80211_IFTYPE_OCB: 656 netif_carrier_off(dev); 657 break; 658 case NL80211_IFTYPE_WDS: 659 case NL80211_IFTYPE_P2P_DEVICE: 660 case NL80211_IFTYPE_NAN: 661 break; 662 default: 663 /* not reached */ 664 WARN_ON(1); 665 } 666 667 /* 668 * Set default queue parameters so drivers don't 669 * need to initialise the hardware if the hardware 670 * doesn't start up with sane defaults. 671 * Enable QoS for anything but station interfaces. 672 */ 673 ieee80211_set_wmm_default(sdata, true, 674 sdata->vif.type != NL80211_IFTYPE_STATION); 675 } 676 677 set_bit(SDATA_STATE_RUNNING, &sdata->state); 678 679 switch (sdata->vif.type) { 680 case NL80211_IFTYPE_WDS: 681 /* Create STA entry for the WDS peer */ 682 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, 683 GFP_KERNEL); 684 if (!sta) { 685 res = -ENOMEM; 686 goto err_del_interface; 687 } 688 689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); 690 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); 691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); 692 693 res = sta_info_insert(sta); 694 if (res) { 695 /* STA has been freed */ 696 goto err_del_interface; 697 } 698 699 rate_control_rate_init(sta); 700 netif_carrier_on(dev); 701 break; 702 case NL80211_IFTYPE_P2P_DEVICE: 703 rcu_assign_pointer(local->p2p_sdata, sdata); 704 break; 705 case NL80211_IFTYPE_MONITOR: 706 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 707 break; 708 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 709 break; 710 default: 711 break; 712 } 713 714 /* 715 * set_multicast_list will be invoked by the networking core 716 * which will check whether any increments here were done in 717 * error and sync them down to the hardware as filter flags. 718 */ 719 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 720 atomic_inc(&local->iff_allmultis); 721 722 if (coming_up) 723 local->open_count++; 724 725 if (hw_reconf_flags) 726 ieee80211_hw_config(local, hw_reconf_flags); 727 728 ieee80211_recalc_ps(local); 729 730 if (sdata->vif.type == NL80211_IFTYPE_MONITOR || 731 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 732 local->ops->wake_tx_queue) { 733 /* XXX: for AP_VLAN, actually track AP queues */ 734 if (dev) 735 netif_tx_start_all_queues(dev); 736 } else if (dev) { 737 unsigned long flags; 738 int n_acs = IEEE80211_NUM_ACS; 739 int ac; 740 741 if (local->hw.queues < IEEE80211_NUM_ACS) 742 n_acs = 1; 743 744 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 745 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE || 746 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 && 747 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) { 748 for (ac = 0; ac < n_acs; ac++) { 749 int ac_queue = sdata->vif.hw_queue[ac]; 750 751 if (local->queue_stop_reasons[ac_queue] == 0 && 752 skb_queue_empty(&local->pending[ac_queue])) 753 netif_start_subqueue(dev, ac); 754 } 755 } 756 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 757 } 758 759 return 0; 760 err_del_interface: 761 drv_remove_interface(local, sdata); 762 err_stop: 763 if (!local->open_count) 764 drv_stop(local); 765 err_del_bss: 766 sdata->bss = NULL; 767 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 768 mutex_lock(&local->mtx); 769 list_del(&sdata->u.vlan.list); 770 mutex_unlock(&local->mtx); 771 } 772 /* might already be clear but that doesn't matter */ 773 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 774 return res; 775 } 776 777 static int ieee80211_open(struct net_device *dev) 778 { 779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 780 int err; 781 782 /* fail early if user set an invalid address */ 783 if (!is_valid_ether_addr(dev->dev_addr)) 784 return -EADDRNOTAVAIL; 785 786 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 787 if (err) 788 return err; 789 790 return ieee80211_do_open(&sdata->wdev, true); 791 } 792 793 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 794 bool going_down) 795 { 796 struct ieee80211_local *local = sdata->local; 797 unsigned long flags; 798 struct sk_buff *skb, *tmp; 799 u32 hw_reconf_flags = 0; 800 int i, flushed; 801 struct ps_data *ps; 802 struct cfg80211_chan_def chandef; 803 bool cancel_scan; 804 struct cfg80211_nan_func *func; 805 806 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 807 808 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 809 if (cancel_scan) 810 ieee80211_scan_cancel(local); 811 812 /* 813 * Stop TX on this interface first. 814 */ 815 if (sdata->dev) 816 netif_tx_stop_all_queues(sdata->dev); 817 818 ieee80211_roc_purge(local, sdata); 819 820 switch (sdata->vif.type) { 821 case NL80211_IFTYPE_STATION: 822 ieee80211_mgd_stop(sdata); 823 break; 824 case NL80211_IFTYPE_ADHOC: 825 ieee80211_ibss_stop(sdata); 826 break; 827 case NL80211_IFTYPE_AP: 828 cancel_work_sync(&sdata->u.ap.request_smps_work); 829 break; 830 case NL80211_IFTYPE_MONITOR: 831 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) 832 break; 833 list_del_rcu(&sdata->u.mntr.list); 834 break; 835 default: 836 break; 837 } 838 839 /* 840 * Remove all stations associated with this interface. 841 * 842 * This must be done before calling ops->remove_interface() 843 * because otherwise we can later invoke ops->sta_notify() 844 * whenever the STAs are removed, and that invalidates driver 845 * assumptions about always getting a vif pointer that is valid 846 * (because if we remove a STA after ops->remove_interface() 847 * the driver will have removed the vif info already!) 848 * 849 * In WDS mode a station must exist here and be flushed, for 850 * AP_VLANs stations may exist since there's nothing else that 851 * would have removed them, but in other modes there shouldn't 852 * be any stations. 853 */ 854 flushed = sta_info_flush(sdata); 855 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 856 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || 857 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1))); 858 859 /* don't count this interface for allmulti while it is down */ 860 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 861 atomic_dec(&local->iff_allmultis); 862 863 if (sdata->vif.type == NL80211_IFTYPE_AP) { 864 local->fif_pspoll--; 865 local->fif_probe_req--; 866 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 867 local->fif_probe_req--; 868 } 869 870 if (sdata->dev) { 871 netif_addr_lock_bh(sdata->dev); 872 spin_lock_bh(&local->filter_lock); 873 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 874 sdata->dev->addr_len); 875 spin_unlock_bh(&local->filter_lock); 876 netif_addr_unlock_bh(sdata->dev); 877 } 878 879 del_timer_sync(&local->dynamic_ps_timer); 880 cancel_work_sync(&local->dynamic_ps_enable_work); 881 882 cancel_work_sync(&sdata->recalc_smps); 883 sdata_lock(sdata); 884 mutex_lock(&local->mtx); 885 sdata->vif.csa_active = false; 886 if (sdata->vif.type == NL80211_IFTYPE_STATION) 887 sdata->u.mgd.csa_waiting_bcn = false; 888 if (sdata->csa_block_tx) { 889 ieee80211_wake_vif_queues(local, sdata, 890 IEEE80211_QUEUE_STOP_REASON_CSA); 891 sdata->csa_block_tx = false; 892 } 893 mutex_unlock(&local->mtx); 894 sdata_unlock(sdata); 895 896 cancel_work_sync(&sdata->csa_finalize_work); 897 898 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); 899 900 if (sdata->wdev.cac_started) { 901 chandef = sdata->vif.bss_conf.chandef; 902 WARN_ON(local->suspended); 903 mutex_lock(&local->mtx); 904 ieee80211_vif_release_channel(sdata); 905 mutex_unlock(&local->mtx); 906 cfg80211_cac_event(sdata->dev, &chandef, 907 NL80211_RADAR_CAC_ABORTED, 908 GFP_KERNEL); 909 } 910 911 /* APs need special treatment */ 912 if (sdata->vif.type == NL80211_IFTYPE_AP) { 913 struct ieee80211_sub_if_data *vlan, *tmpsdata; 914 915 /* down all dependent devices, that is VLANs */ 916 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 917 u.vlan.list) 918 dev_close(vlan->dev); 919 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 920 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 921 /* remove all packets in parent bc_buf pointing to this dev */ 922 ps = &sdata->bss->ps; 923 924 spin_lock_irqsave(&ps->bc_buf.lock, flags); 925 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 926 if (skb->dev == sdata->dev) { 927 __skb_unlink(skb, &ps->bc_buf); 928 local->total_ps_buffered--; 929 ieee80211_free_txskb(&local->hw, skb); 930 } 931 } 932 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 933 } 934 935 if (going_down) 936 local->open_count--; 937 938 switch (sdata->vif.type) { 939 case NL80211_IFTYPE_AP_VLAN: 940 mutex_lock(&local->mtx); 941 list_del(&sdata->u.vlan.list); 942 mutex_unlock(&local->mtx); 943 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); 944 /* see comment in the default case below */ 945 ieee80211_free_keys(sdata, true); 946 /* no need to tell driver */ 947 break; 948 case NL80211_IFTYPE_MONITOR: 949 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) { 950 local->cooked_mntrs--; 951 break; 952 } 953 954 local->monitors--; 955 if (local->monitors == 0) { 956 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 957 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 958 } 959 960 ieee80211_adjust_monitor_flags(sdata, -1); 961 break; 962 case NL80211_IFTYPE_NAN: 963 /* clean all the functions */ 964 spin_lock_bh(&sdata->u.nan.func_lock); 965 966 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 967 idr_remove(&sdata->u.nan.function_inst_ids, i); 968 cfg80211_free_nan_func(func); 969 } 970 idr_destroy(&sdata->u.nan.function_inst_ids); 971 972 spin_unlock_bh(&sdata->u.nan.func_lock); 973 break; 974 case NL80211_IFTYPE_P2P_DEVICE: 975 /* relies on synchronize_rcu() below */ 976 RCU_INIT_POINTER(local->p2p_sdata, NULL); 977 /* fall through */ 978 default: 979 cancel_work_sync(&sdata->work); 980 /* 981 * When we get here, the interface is marked down. 982 * Free the remaining keys, if there are any 983 * (which can happen in AP mode if userspace sets 984 * keys before the interface is operating, and maybe 985 * also in WDS mode) 986 * 987 * Force the key freeing to always synchronize_net() 988 * to wait for the RX path in case it is using this 989 * interface enqueuing frames at this very time on 990 * another CPU. 991 */ 992 ieee80211_free_keys(sdata, true); 993 skb_queue_purge(&sdata->skb_queue); 994 } 995 996 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 997 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 998 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 999 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1000 if (info->control.vif == &sdata->vif) { 1001 __skb_unlink(skb, &local->pending[i]); 1002 ieee80211_free_txskb(&local->hw, skb); 1003 } 1004 } 1005 } 1006 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 1007 1008 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1009 ieee80211_txq_remove_vlan(local, sdata); 1010 1011 sdata->bss = NULL; 1012 1013 if (local->open_count == 0) 1014 ieee80211_clear_tx_pending(local); 1015 1016 sdata->vif.bss_conf.beacon_int = 0; 1017 1018 /* 1019 * If the interface goes down while suspended, presumably because 1020 * the device was unplugged and that happens before our resume, 1021 * then the driver is already unconfigured and the remainder of 1022 * this function isn't needed. 1023 * XXX: what about WoWLAN? If the device has software state, e.g. 1024 * memory allocated, it might expect teardown commands from 1025 * mac80211 here? 1026 */ 1027 if (local->suspended) { 1028 WARN_ON(local->wowlan); 1029 WARN_ON(rtnl_dereference(local->monitor_sdata)); 1030 return; 1031 } 1032 1033 switch (sdata->vif.type) { 1034 case NL80211_IFTYPE_AP_VLAN: 1035 break; 1036 case NL80211_IFTYPE_MONITOR: 1037 if (local->monitors == 0) 1038 ieee80211_del_virtual_monitor(local); 1039 1040 mutex_lock(&local->mtx); 1041 ieee80211_recalc_idle(local); 1042 mutex_unlock(&local->mtx); 1043 1044 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 1045 break; 1046 1047 /* fall through */ 1048 default: 1049 if (going_down) 1050 drv_remove_interface(local, sdata); 1051 } 1052 1053 ieee80211_recalc_ps(local); 1054 1055 if (cancel_scan) 1056 flush_delayed_work(&local->scan_work); 1057 1058 if (local->open_count == 0) { 1059 ieee80211_stop_device(local); 1060 1061 /* no reconfiguring after stop! */ 1062 return; 1063 } 1064 1065 /* do after stop to avoid reconfiguring when we stop anyway */ 1066 ieee80211_configure_filter(local); 1067 ieee80211_hw_config(local, hw_reconf_flags); 1068 1069 if (local->monitors == local->open_count) 1070 ieee80211_add_virtual_monitor(local); 1071 } 1072 1073 static int ieee80211_stop(struct net_device *dev) 1074 { 1075 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1076 1077 ieee80211_do_stop(sdata, true); 1078 1079 return 0; 1080 } 1081 1082 static void ieee80211_set_multicast_list(struct net_device *dev) 1083 { 1084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1085 struct ieee80211_local *local = sdata->local; 1086 int allmulti, sdata_allmulti; 1087 1088 allmulti = !!(dev->flags & IFF_ALLMULTI); 1089 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 1090 1091 if (allmulti != sdata_allmulti) { 1092 if (dev->flags & IFF_ALLMULTI) 1093 atomic_inc(&local->iff_allmultis); 1094 else 1095 atomic_dec(&local->iff_allmultis); 1096 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 1097 } 1098 1099 spin_lock_bh(&local->filter_lock); 1100 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 1101 spin_unlock_bh(&local->filter_lock); 1102 ieee80211_queue_work(&local->hw, &local->reconfig_filter); 1103 } 1104 1105 /* 1106 * Called when the netdev is removed or, by the code below, before 1107 * the interface type changes. 1108 */ 1109 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1110 { 1111 int i; 1112 1113 /* free extra data */ 1114 ieee80211_free_keys(sdata, false); 1115 1116 ieee80211_debugfs_remove_netdev(sdata); 1117 1118 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1119 __skb_queue_purge(&sdata->fragments[i].skb_list); 1120 sdata->fragment_next = 0; 1121 1122 if (ieee80211_vif_is_mesh(&sdata->vif)) 1123 ieee80211_mesh_teardown_sdata(sdata); 1124 } 1125 1126 static void ieee80211_uninit(struct net_device *dev) 1127 { 1128 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 1129 } 1130 1131 static u16 ieee80211_netdev_select_queue(struct net_device *dev, 1132 struct sk_buff *skb, 1133 struct net_device *sb_dev) 1134 { 1135 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb); 1136 } 1137 1138 static void 1139 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1140 { 1141 int i; 1142 1143 for_each_possible_cpu(i) { 1144 const struct pcpu_sw_netstats *tstats; 1145 u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 1146 unsigned int start; 1147 1148 tstats = per_cpu_ptr(dev->tstats, i); 1149 1150 do { 1151 start = u64_stats_fetch_begin_irq(&tstats->syncp); 1152 rx_packets = tstats->rx_packets; 1153 tx_packets = tstats->tx_packets; 1154 rx_bytes = tstats->rx_bytes; 1155 tx_bytes = tstats->tx_bytes; 1156 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 1157 1158 stats->rx_packets += rx_packets; 1159 stats->tx_packets += tx_packets; 1160 stats->rx_bytes += rx_bytes; 1161 stats->tx_bytes += tx_bytes; 1162 } 1163 } 1164 1165 static const struct net_device_ops ieee80211_dataif_ops = { 1166 .ndo_open = ieee80211_open, 1167 .ndo_stop = ieee80211_stop, 1168 .ndo_uninit = ieee80211_uninit, 1169 .ndo_start_xmit = ieee80211_subif_start_xmit, 1170 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1171 .ndo_set_mac_address = ieee80211_change_mac, 1172 .ndo_select_queue = ieee80211_netdev_select_queue, 1173 .ndo_get_stats64 = ieee80211_get_stats64, 1174 }; 1175 1176 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 1177 struct sk_buff *skb, 1178 struct net_device *sb_dev) 1179 { 1180 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1181 struct ieee80211_local *local = sdata->local; 1182 struct ieee80211_hdr *hdr; 1183 struct ieee80211_radiotap_header *rtap = (void *)skb->data; 1184 1185 if (local->hw.queues < IEEE80211_NUM_ACS) 1186 return 0; 1187 1188 if (skb->len < 4 || 1189 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */) 1190 return 0; /* doesn't matter, frame will be dropped */ 1191 1192 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len)); 1193 1194 return ieee80211_select_queue_80211(sdata, skb, hdr); 1195 } 1196 1197 static const struct net_device_ops ieee80211_monitorif_ops = { 1198 .ndo_open = ieee80211_open, 1199 .ndo_stop = ieee80211_stop, 1200 .ndo_uninit = ieee80211_uninit, 1201 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1202 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1203 .ndo_set_mac_address = ieee80211_change_mac, 1204 .ndo_select_queue = ieee80211_monitor_select_queue, 1205 .ndo_get_stats64 = ieee80211_get_stats64, 1206 }; 1207 1208 static void ieee80211_if_free(struct net_device *dev) 1209 { 1210 free_percpu(dev->tstats); 1211 } 1212 1213 static void ieee80211_if_setup(struct net_device *dev) 1214 { 1215 ether_setup(dev); 1216 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1217 dev->netdev_ops = &ieee80211_dataif_ops; 1218 dev->needs_free_netdev = true; 1219 dev->priv_destructor = ieee80211_if_free; 1220 } 1221 1222 static void ieee80211_if_setup_no_queue(struct net_device *dev) 1223 { 1224 ieee80211_if_setup(dev); 1225 dev->features |= NETIF_F_LLTX; 1226 dev->priv_flags |= IFF_NO_QUEUE; 1227 } 1228 1229 static void ieee80211_iface_work(struct work_struct *work) 1230 { 1231 struct ieee80211_sub_if_data *sdata = 1232 container_of(work, struct ieee80211_sub_if_data, work); 1233 struct ieee80211_local *local = sdata->local; 1234 struct sk_buff *skb; 1235 struct sta_info *sta; 1236 1237 if (!ieee80211_sdata_running(sdata)) 1238 return; 1239 1240 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1241 return; 1242 1243 if (!ieee80211_can_run_worker(local)) 1244 return; 1245 1246 /* first process frames */ 1247 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1248 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1249 1250 if (ieee80211_is_action(mgmt->frame_control) && 1251 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1252 int len = skb->len; 1253 1254 mutex_lock(&local->sta_mtx); 1255 sta = sta_info_get_bss(sdata, mgmt->sa); 1256 if (sta) { 1257 switch (mgmt->u.action.u.addba_req.action_code) { 1258 case WLAN_ACTION_ADDBA_REQ: 1259 ieee80211_process_addba_request( 1260 local, sta, mgmt, len); 1261 break; 1262 case WLAN_ACTION_ADDBA_RESP: 1263 ieee80211_process_addba_resp(local, sta, 1264 mgmt, len); 1265 break; 1266 case WLAN_ACTION_DELBA: 1267 ieee80211_process_delba(sdata, sta, 1268 mgmt, len); 1269 break; 1270 default: 1271 WARN_ON(1); 1272 break; 1273 } 1274 } 1275 mutex_unlock(&local->sta_mtx); 1276 } else if (ieee80211_is_action(mgmt->frame_control) && 1277 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1278 switch (mgmt->u.action.u.vht_group_notif.action_code) { 1279 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1280 struct ieee80211_rx_status *status; 1281 enum nl80211_band band; 1282 u8 opmode; 1283 1284 status = IEEE80211_SKB_RXCB(skb); 1285 band = status->band; 1286 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; 1287 1288 mutex_lock(&local->sta_mtx); 1289 sta = sta_info_get_bss(sdata, mgmt->sa); 1290 1291 if (sta) 1292 ieee80211_vht_handle_opmode(sdata, sta, 1293 opmode, 1294 band); 1295 1296 mutex_unlock(&local->sta_mtx); 1297 break; 1298 } 1299 case WLAN_VHT_ACTION_GROUPID_MGMT: 1300 ieee80211_process_mu_groups(sdata, mgmt); 1301 break; 1302 default: 1303 WARN_ON(1); 1304 break; 1305 } 1306 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1307 struct ieee80211_hdr *hdr = (void *)mgmt; 1308 /* 1309 * So the frame isn't mgmt, but frame_control 1310 * is at the right place anyway, of course, so 1311 * the if statement is correct. 1312 * 1313 * Warn if we have other data frame types here, 1314 * they must not get here. 1315 */ 1316 WARN_ON(hdr->frame_control & 1317 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1318 WARN_ON(!(hdr->seq_ctrl & 1319 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1320 /* 1321 * This was a fragment of a frame, received while 1322 * a block-ack session was active. That cannot be 1323 * right, so terminate the session. 1324 */ 1325 mutex_lock(&local->sta_mtx); 1326 sta = sta_info_get_bss(sdata, mgmt->sa); 1327 if (sta) { 1328 u16 tid = ieee80211_get_tid(hdr); 1329 1330 __ieee80211_stop_rx_ba_session( 1331 sta, tid, WLAN_BACK_RECIPIENT, 1332 WLAN_REASON_QSTA_REQUIRE_SETUP, 1333 true); 1334 } 1335 mutex_unlock(&local->sta_mtx); 1336 } else switch (sdata->vif.type) { 1337 case NL80211_IFTYPE_STATION: 1338 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1339 break; 1340 case NL80211_IFTYPE_ADHOC: 1341 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1342 break; 1343 case NL80211_IFTYPE_MESH_POINT: 1344 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1345 break; 1346 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1347 break; 1348 default: 1349 WARN(1, "frame for unexpected interface type"); 1350 break; 1351 } 1352 1353 kfree_skb(skb); 1354 } 1355 1356 /* then other type-dependent work */ 1357 switch (sdata->vif.type) { 1358 case NL80211_IFTYPE_STATION: 1359 ieee80211_sta_work(sdata); 1360 break; 1361 case NL80211_IFTYPE_ADHOC: 1362 ieee80211_ibss_work(sdata); 1363 break; 1364 case NL80211_IFTYPE_MESH_POINT: 1365 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1366 break; 1367 ieee80211_mesh_work(sdata); 1368 break; 1369 case NL80211_IFTYPE_OCB: 1370 ieee80211_ocb_work(sdata); 1371 break; 1372 default: 1373 break; 1374 } 1375 } 1376 1377 static void ieee80211_recalc_smps_work(struct work_struct *work) 1378 { 1379 struct ieee80211_sub_if_data *sdata = 1380 container_of(work, struct ieee80211_sub_if_data, recalc_smps); 1381 1382 ieee80211_recalc_smps(sdata); 1383 } 1384 1385 /* 1386 * Helper function to initialise an interface to a specific type. 1387 */ 1388 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1389 enum nl80211_iftype type) 1390 { 1391 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1392 0xff, 0xff, 0xff}; 1393 1394 /* clear type-dependent union */ 1395 memset(&sdata->u, 0, sizeof(sdata->u)); 1396 1397 /* and set some type-dependent values */ 1398 sdata->vif.type = type; 1399 sdata->vif.p2p = false; 1400 sdata->wdev.iftype = type; 1401 1402 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1403 sdata->control_port_no_encrypt = false; 1404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1405 sdata->vif.bss_conf.idle = true; 1406 1407 sdata->noack_map = 0; 1408 1409 /* only monitor/p2p-device differ */ 1410 if (sdata->dev) { 1411 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1412 sdata->dev->type = ARPHRD_ETHER; 1413 } 1414 1415 skb_queue_head_init(&sdata->skb_queue); 1416 INIT_WORK(&sdata->work, ieee80211_iface_work); 1417 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); 1418 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); 1419 INIT_LIST_HEAD(&sdata->assigned_chanctx_list); 1420 INIT_LIST_HEAD(&sdata->reserved_chanctx_list); 1421 1422 switch (type) { 1423 case NL80211_IFTYPE_P2P_GO: 1424 type = NL80211_IFTYPE_AP; 1425 sdata->vif.type = type; 1426 sdata->vif.p2p = true; 1427 /* fall through */ 1428 case NL80211_IFTYPE_AP: 1429 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1430 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1431 INIT_WORK(&sdata->u.ap.request_smps_work, 1432 ieee80211_request_smps_ap_work); 1433 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1434 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF; 1435 break; 1436 case NL80211_IFTYPE_P2P_CLIENT: 1437 type = NL80211_IFTYPE_STATION; 1438 sdata->vif.type = type; 1439 sdata->vif.p2p = true; 1440 /* fall through */ 1441 case NL80211_IFTYPE_STATION: 1442 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 1443 ieee80211_sta_setup_sdata(sdata); 1444 break; 1445 case NL80211_IFTYPE_OCB: 1446 sdata->vif.bss_conf.bssid = bssid_wildcard; 1447 ieee80211_ocb_setup_sdata(sdata); 1448 break; 1449 case NL80211_IFTYPE_ADHOC: 1450 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1451 ieee80211_ibss_setup_sdata(sdata); 1452 break; 1453 case NL80211_IFTYPE_MESH_POINT: 1454 if (ieee80211_vif_is_mesh(&sdata->vif)) 1455 ieee80211_mesh_init_sdata(sdata); 1456 break; 1457 case NL80211_IFTYPE_MONITOR: 1458 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1459 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1460 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1461 MONITOR_FLAG_OTHER_BSS; 1462 break; 1463 case NL80211_IFTYPE_WDS: 1464 sdata->vif.bss_conf.bssid = NULL; 1465 break; 1466 case NL80211_IFTYPE_NAN: 1467 idr_init(&sdata->u.nan.function_inst_ids); 1468 spin_lock_init(&sdata->u.nan.func_lock); 1469 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1470 break; 1471 case NL80211_IFTYPE_AP_VLAN: 1472 case NL80211_IFTYPE_P2P_DEVICE: 1473 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1474 break; 1475 case NL80211_IFTYPE_UNSPECIFIED: 1476 case NUM_NL80211_IFTYPES: 1477 WARN_ON(1); 1478 break; 1479 } 1480 1481 ieee80211_debugfs_add_netdev(sdata); 1482 } 1483 1484 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1485 enum nl80211_iftype type) 1486 { 1487 struct ieee80211_local *local = sdata->local; 1488 int ret, err; 1489 enum nl80211_iftype internal_type = type; 1490 bool p2p = false; 1491 1492 ASSERT_RTNL(); 1493 1494 if (!local->ops->change_interface) 1495 return -EBUSY; 1496 1497 switch (sdata->vif.type) { 1498 case NL80211_IFTYPE_AP: 1499 case NL80211_IFTYPE_STATION: 1500 case NL80211_IFTYPE_ADHOC: 1501 case NL80211_IFTYPE_OCB: 1502 /* 1503 * Could maybe also all others here? 1504 * Just not sure how that interacts 1505 * with the RX/config path e.g. for 1506 * mesh. 1507 */ 1508 break; 1509 default: 1510 return -EBUSY; 1511 } 1512 1513 switch (type) { 1514 case NL80211_IFTYPE_AP: 1515 case NL80211_IFTYPE_STATION: 1516 case NL80211_IFTYPE_ADHOC: 1517 case NL80211_IFTYPE_OCB: 1518 /* 1519 * Could probably support everything 1520 * but WDS here (WDS do_open can fail 1521 * under memory pressure, which this 1522 * code isn't prepared to handle). 1523 */ 1524 break; 1525 case NL80211_IFTYPE_P2P_CLIENT: 1526 p2p = true; 1527 internal_type = NL80211_IFTYPE_STATION; 1528 break; 1529 case NL80211_IFTYPE_P2P_GO: 1530 p2p = true; 1531 internal_type = NL80211_IFTYPE_AP; 1532 break; 1533 default: 1534 return -EBUSY; 1535 } 1536 1537 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 1538 if (ret) 1539 return ret; 1540 1541 ieee80211_do_stop(sdata, false); 1542 1543 ieee80211_teardown_sdata(sdata); 1544 1545 ret = drv_change_interface(local, sdata, internal_type, p2p); 1546 if (ret) 1547 type = ieee80211_vif_type_p2p(&sdata->vif); 1548 1549 /* 1550 * Ignore return value here, there's not much we can do since 1551 * the driver changed the interface type internally already. 1552 * The warnings will hopefully make driver authors fix it :-) 1553 */ 1554 ieee80211_check_queues(sdata, type); 1555 1556 ieee80211_setup_sdata(sdata, type); 1557 1558 err = ieee80211_do_open(&sdata->wdev, false); 1559 WARN(err, "type change: do_open returned %d", err); 1560 1561 return ret; 1562 } 1563 1564 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 1565 enum nl80211_iftype type) 1566 { 1567 int ret; 1568 1569 ASSERT_RTNL(); 1570 1571 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 1572 return 0; 1573 1574 if (ieee80211_sdata_running(sdata)) { 1575 ret = ieee80211_runtime_change_iftype(sdata, type); 1576 if (ret) 1577 return ret; 1578 } else { 1579 /* Purge and reset type-dependent state. */ 1580 ieee80211_teardown_sdata(sdata); 1581 ieee80211_setup_sdata(sdata, type); 1582 } 1583 1584 /* reset some values that shouldn't be kept across type changes */ 1585 if (type == NL80211_IFTYPE_STATION) 1586 sdata->u.mgd.use_4addr = false; 1587 1588 return 0; 1589 } 1590 1591 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 1592 u8 *perm_addr, enum nl80211_iftype type) 1593 { 1594 struct ieee80211_sub_if_data *sdata; 1595 u64 mask, start, addr, val, inc; 1596 u8 *m; 1597 u8 tmp_addr[ETH_ALEN]; 1598 int i; 1599 1600 /* default ... something at least */ 1601 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 1602 1603 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 1604 local->hw.wiphy->n_addresses <= 1) 1605 return; 1606 1607 mutex_lock(&local->iflist_mtx); 1608 1609 switch (type) { 1610 case NL80211_IFTYPE_MONITOR: 1611 /* doesn't matter */ 1612 break; 1613 case NL80211_IFTYPE_WDS: 1614 case NL80211_IFTYPE_AP_VLAN: 1615 /* match up with an AP interface */ 1616 list_for_each_entry(sdata, &local->interfaces, list) { 1617 if (sdata->vif.type != NL80211_IFTYPE_AP) 1618 continue; 1619 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1620 break; 1621 } 1622 /* keep default if no AP interface present */ 1623 break; 1624 case NL80211_IFTYPE_P2P_CLIENT: 1625 case NL80211_IFTYPE_P2P_GO: 1626 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 1627 list_for_each_entry(sdata, &local->interfaces, list) { 1628 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 1629 continue; 1630 if (!ieee80211_sdata_running(sdata)) 1631 continue; 1632 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 1633 goto out_unlock; 1634 } 1635 } 1636 /* fall through */ 1637 default: 1638 /* assign a new address if possible -- try n_addresses first */ 1639 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 1640 bool used = false; 1641 1642 list_for_each_entry(sdata, &local->interfaces, list) { 1643 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 1644 sdata->vif.addr)) { 1645 used = true; 1646 break; 1647 } 1648 } 1649 1650 if (!used) { 1651 memcpy(perm_addr, 1652 local->hw.wiphy->addresses[i].addr, 1653 ETH_ALEN); 1654 break; 1655 } 1656 } 1657 1658 /* try mask if available */ 1659 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 1660 break; 1661 1662 m = local->hw.wiphy->addr_mask; 1663 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1664 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1665 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1666 1667 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 1668 /* not a contiguous mask ... not handled now! */ 1669 pr_info("not contiguous\n"); 1670 break; 1671 } 1672 1673 /* 1674 * Pick address of existing interface in case user changed 1675 * MAC address manually, default to perm_addr. 1676 */ 1677 m = local->hw.wiphy->perm_addr; 1678 list_for_each_entry(sdata, &local->interfaces, list) { 1679 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 1680 continue; 1681 m = sdata->vif.addr; 1682 break; 1683 } 1684 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 1685 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 1686 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 1687 1688 inc = 1ULL<<__ffs64(mask); 1689 val = (start & mask); 1690 addr = (start & ~mask) | (val & mask); 1691 do { 1692 bool used = false; 1693 1694 tmp_addr[5] = addr >> 0*8; 1695 tmp_addr[4] = addr >> 1*8; 1696 tmp_addr[3] = addr >> 2*8; 1697 tmp_addr[2] = addr >> 3*8; 1698 tmp_addr[1] = addr >> 4*8; 1699 tmp_addr[0] = addr >> 5*8; 1700 1701 val += inc; 1702 1703 list_for_each_entry(sdata, &local->interfaces, list) { 1704 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 1705 used = true; 1706 break; 1707 } 1708 } 1709 1710 if (!used) { 1711 memcpy(perm_addr, tmp_addr, ETH_ALEN); 1712 break; 1713 } 1714 addr = (start & ~mask) | (val & mask); 1715 } while (addr != start); 1716 1717 break; 1718 } 1719 1720 out_unlock: 1721 mutex_unlock(&local->iflist_mtx); 1722 } 1723 1724 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 1725 unsigned char name_assign_type, 1726 struct wireless_dev **new_wdev, enum nl80211_iftype type, 1727 struct vif_params *params) 1728 { 1729 struct net_device *ndev = NULL; 1730 struct ieee80211_sub_if_data *sdata = NULL; 1731 struct txq_info *txqi; 1732 void (*if_setup)(struct net_device *dev); 1733 int ret, i; 1734 int txqs = 1; 1735 1736 ASSERT_RTNL(); 1737 1738 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 1739 struct wireless_dev *wdev; 1740 1741 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 1742 GFP_KERNEL); 1743 if (!sdata) 1744 return -ENOMEM; 1745 wdev = &sdata->wdev; 1746 1747 sdata->dev = NULL; 1748 strlcpy(sdata->name, name, IFNAMSIZ); 1749 ieee80211_assign_perm_addr(local, wdev->address, type); 1750 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 1751 } else { 1752 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 1753 sizeof(void *)); 1754 int txq_size = 0; 1755 1756 if (local->ops->wake_tx_queue && 1757 type != NL80211_IFTYPE_AP_VLAN && 1758 (type != NL80211_IFTYPE_MONITOR || 1759 (params->flags & MONITOR_FLAG_ACTIVE))) 1760 txq_size += sizeof(struct txq_info) + 1761 local->hw.txq_data_size; 1762 1763 if (local->ops->wake_tx_queue) { 1764 if_setup = ieee80211_if_setup_no_queue; 1765 } else { 1766 if_setup = ieee80211_if_setup; 1767 if (local->hw.queues >= IEEE80211_NUM_ACS) 1768 txqs = IEEE80211_NUM_ACS; 1769 } 1770 1771 ndev = alloc_netdev_mqs(size + txq_size, 1772 name, name_assign_type, 1773 if_setup, txqs, 1); 1774 if (!ndev) 1775 return -ENOMEM; 1776 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 1777 1778 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1779 if (!ndev->tstats) { 1780 free_netdev(ndev); 1781 return -ENOMEM; 1782 } 1783 1784 ndev->needed_headroom = local->tx_headroom + 1785 4*6 /* four MAC addresses */ 1786 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 1787 + 6 /* mesh */ 1788 + 8 /* rfc1042/bridge tunnel */ 1789 - ETH_HLEN /* ethernet hard_header_len */ 1790 + IEEE80211_ENCRYPT_HEADROOM; 1791 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 1792 1793 ret = dev_alloc_name(ndev, ndev->name); 1794 if (ret < 0) { 1795 ieee80211_if_free(ndev); 1796 free_netdev(ndev); 1797 return ret; 1798 } 1799 1800 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 1801 if (is_valid_ether_addr(params->macaddr)) 1802 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN); 1803 else 1804 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN); 1805 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 1806 1807 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 1808 sdata = netdev_priv(ndev); 1809 ndev->ieee80211_ptr = &sdata->wdev; 1810 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 1811 memcpy(sdata->name, ndev->name, IFNAMSIZ); 1812 1813 if (txq_size) { 1814 txqi = netdev_priv(ndev) + size; 1815 ieee80211_txq_init(sdata, NULL, txqi, 0); 1816 } 1817 1818 sdata->dev = ndev; 1819 } 1820 1821 /* initialise type-independent data */ 1822 sdata->wdev.wiphy = local->hw.wiphy; 1823 sdata->local = local; 1824 1825 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) 1826 skb_queue_head_init(&sdata->fragments[i].skb_list); 1827 1828 INIT_LIST_HEAD(&sdata->key_list); 1829 1830 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, 1831 ieee80211_dfs_cac_timer_work); 1832 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, 1833 ieee80211_delayed_tailroom_dec); 1834 1835 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1836 struct ieee80211_supported_band *sband; 1837 sband = local->hw.wiphy->bands[i]; 1838 sdata->rc_rateidx_mask[i] = 1839 sband ? (1 << sband->n_bitrates) - 1 : 0; 1840 if (sband) { 1841 __le16 cap; 1842 u16 *vht_rate_mask; 1843 1844 memcpy(sdata->rc_rateidx_mcs_mask[i], 1845 sband->ht_cap.mcs.rx_mask, 1846 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1847 1848 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 1849 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 1850 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 1851 } else { 1852 memset(sdata->rc_rateidx_mcs_mask[i], 0, 1853 sizeof(sdata->rc_rateidx_mcs_mask[i])); 1854 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 1855 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 1856 } 1857 } 1858 1859 ieee80211_set_default_queues(sdata); 1860 1861 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 1862 sdata->user_power_level = local->user_power_level; 1863 1864 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; 1865 1866 /* setup type-dependent data */ 1867 ieee80211_setup_sdata(sdata, type); 1868 1869 if (ndev) { 1870 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 1871 if (type == NL80211_IFTYPE_STATION) 1872 sdata->u.mgd.use_4addr = params->use_4addr; 1873 1874 ndev->features |= local->hw.netdev_features; 1875 1876 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 1877 1878 /* MTU range: 256 - 2304 */ 1879 ndev->min_mtu = 256; 1880 ndev->max_mtu = IEEE80211_MAX_DATA_LEN; 1881 1882 ret = register_netdevice(ndev); 1883 if (ret) { 1884 free_netdev(ndev); 1885 return ret; 1886 } 1887 } 1888 1889 mutex_lock(&local->iflist_mtx); 1890 list_add_tail_rcu(&sdata->list, &local->interfaces); 1891 mutex_unlock(&local->iflist_mtx); 1892 1893 if (new_wdev) 1894 *new_wdev = &sdata->wdev; 1895 1896 return 0; 1897 } 1898 1899 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 1900 { 1901 ASSERT_RTNL(); 1902 1903 mutex_lock(&sdata->local->iflist_mtx); 1904 list_del_rcu(&sdata->list); 1905 mutex_unlock(&sdata->local->iflist_mtx); 1906 1907 if (sdata->vif.txq) 1908 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 1909 1910 synchronize_rcu(); 1911 1912 if (sdata->dev) { 1913 unregister_netdevice(sdata->dev); 1914 } else { 1915 cfg80211_unregister_wdev(&sdata->wdev); 1916 ieee80211_teardown_sdata(sdata); 1917 kfree(sdata); 1918 } 1919 } 1920 1921 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 1922 { 1923 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 1924 return; 1925 ieee80211_do_stop(sdata, true); 1926 } 1927 1928 void ieee80211_remove_interfaces(struct ieee80211_local *local) 1929 { 1930 struct ieee80211_sub_if_data *sdata, *tmp; 1931 LIST_HEAD(unreg_list); 1932 LIST_HEAD(wdev_list); 1933 1934 ASSERT_RTNL(); 1935 1936 /* Before destroying the interfaces, make sure they're all stopped so 1937 * that the hardware is stopped. Otherwise, the driver might still be 1938 * iterating the interfaces during the shutdown, e.g. from a worker 1939 * or from RX processing or similar, and if it does so (using atomic 1940 * iteration) while we're manipulating the list, the iteration will 1941 * crash. 1942 * 1943 * After this, the hardware should be stopped and the driver should 1944 * have stopped all of its activities, so that we can do RCU-unaware 1945 * manipulations of the interface list below. 1946 */ 1947 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1948 1949 WARN(local->open_count, "%s: open count remains %d\n", 1950 wiphy_name(local->hw.wiphy), local->open_count); 1951 1952 ieee80211_txq_teardown_flows(local); 1953 1954 mutex_lock(&local->iflist_mtx); 1955 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { 1956 list_del(&sdata->list); 1957 1958 if (sdata->dev) 1959 unregister_netdevice_queue(sdata->dev, &unreg_list); 1960 else 1961 list_add(&sdata->list, &wdev_list); 1962 } 1963 mutex_unlock(&local->iflist_mtx); 1964 unregister_netdevice_many(&unreg_list); 1965 1966 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { 1967 list_del(&sdata->list); 1968 cfg80211_unregister_wdev(&sdata->wdev); 1969 kfree(sdata); 1970 } 1971 } 1972 1973 static int netdev_notify(struct notifier_block *nb, 1974 unsigned long state, void *ptr) 1975 { 1976 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1977 struct ieee80211_sub_if_data *sdata; 1978 1979 if (state != NETDEV_CHANGENAME) 1980 return NOTIFY_DONE; 1981 1982 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 1983 return NOTIFY_DONE; 1984 1985 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 1986 return NOTIFY_DONE; 1987 1988 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 1989 memcpy(sdata->name, dev->name, IFNAMSIZ); 1990 ieee80211_debugfs_rename_netdev(sdata); 1991 1992 return NOTIFY_OK; 1993 } 1994 1995 static struct notifier_block mac80211_netdev_notifier = { 1996 .notifier_call = netdev_notify, 1997 }; 1998 1999 int ieee80211_iface_init(void) 2000 { 2001 return register_netdevice_notifier(&mac80211_netdev_notifier); 2002 } 2003 2004 void ieee80211_iface_exit(void) 2005 { 2006 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2007 } 2008 2009 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2010 { 2011 if (sdata->vif.type == NL80211_IFTYPE_AP) 2012 atomic_inc(&sdata->u.ap.num_mcast_sta); 2013 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2014 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2015 } 2016 2017 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2018 { 2019 if (sdata->vif.type == NL80211_IFTYPE_AP) 2020 atomic_dec(&sdata->u.ap.num_mcast_sta); 2021 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2022 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2023 } 2024