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) 2018-2026 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 <linux/kcov.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 *and* wiphy mutex 37 * *and* iflist_mtx 38 * (2) 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 wiphy mutex, the iflist_mtx or RCU. 43 */ 44 45 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work); 46 47 bool __ieee80211_recalc_txpower(struct ieee80211_link_data *link) 48 { 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(link->conf->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 (link->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, link->user_power_level); 64 65 if (link->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, link->ap_power_level); 67 68 if (power != link->conf->txpower) { 69 link->conf->txpower = power; 70 return true; 71 } 72 73 return false; 74 } 75 76 void ieee80211_recalc_txpower(struct ieee80211_link_data *link, 77 bool update_bss) 78 { 79 if (__ieee80211_recalc_txpower(link) || 80 (update_bss && ieee80211_sdata_running(link->sdata))) 81 ieee80211_link_info_change_notify(link->sdata, link, 82 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 struct ieee80211_sub_if_data *iter; 111 112 lockdep_assert_wiphy(local->hw.wiphy); 113 114 active = force_active || 115 !list_empty(&local->chanctx_list) || 116 local->monitors; 117 118 working = !local->ops->remain_on_channel && 119 !list_empty(&local->roc_list); 120 121 list_for_each_entry(iter, &local->interfaces, list) { 122 if (iter->vif.type == NL80211_IFTYPE_NAN && 123 iter->u.nan.started) { 124 working = true; 125 break; 126 } 127 } 128 129 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 130 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 131 132 if (working || scanning) 133 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 134 else 135 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 136 137 if (active) 138 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 139 else 140 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 141 142 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 143 144 if (working || scanning || active) 145 return __ieee80211_idle_off(local); 146 return __ieee80211_idle_on(local); 147 } 148 149 u32 ieee80211_idle_off(struct ieee80211_local *local) 150 { 151 return __ieee80211_recalc_idle(local, true); 152 } 153 154 void ieee80211_recalc_idle(struct ieee80211_local *local) 155 { 156 u32 change = __ieee80211_recalc_idle(local, false); 157 if (change) 158 ieee80211_hw_config(local, -1, change); 159 } 160 161 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 162 bool check_dup) 163 { 164 struct ieee80211_local *local = sdata->local; 165 struct ieee80211_sub_if_data *iter; 166 u64 new, mask, tmp; 167 u8 *m; 168 int ret = 0; 169 170 lockdep_assert_wiphy(local->hw.wiphy); 171 172 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 173 return 0; 174 175 m = addr; 176 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 179 180 m = local->hw.wiphy->addr_mask; 181 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 182 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 183 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 184 185 if (!check_dup) 186 return ret; 187 188 list_for_each_entry(iter, &local->interfaces, list) { 189 if (iter == sdata) 190 continue; 191 192 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 193 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 194 continue; 195 196 m = iter->vif.addr; 197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 200 201 if ((new & ~mask) != (tmp & ~mask)) { 202 ret = -EINVAL; 203 break; 204 } 205 } 206 207 return ret; 208 } 209 210 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata) 211 { 212 struct ieee80211_roc_work *roc; 213 struct ieee80211_local *local = sdata->local; 214 struct ieee80211_sub_if_data *scan_sdata; 215 int ret = 0; 216 217 lockdep_assert_wiphy(local->hw.wiphy); 218 219 /* To be the most flexible here we want to only limit changing the 220 * address if the specific interface is doing offchannel work or 221 * scanning. 222 */ 223 if (netif_carrier_ok(sdata->dev)) 224 return -EBUSY; 225 226 /* if any stations are set known (so they know this vif too), reject */ 227 if (sta_info_get_by_idx(sdata, 0)) 228 return -EBUSY; 229 230 /* First check no ROC work is happening on this iface */ 231 list_for_each_entry(roc, &local->roc_list, list) { 232 if (roc->sdata != sdata) 233 continue; 234 235 if (roc->started) { 236 ret = -EBUSY; 237 goto unlock; 238 } 239 } 240 241 /* And if this iface is scanning */ 242 if (local->scanning) { 243 scan_sdata = rcu_dereference_protected(local->scan_sdata, 244 lockdep_is_held(&local->hw.wiphy->mtx)); 245 if (sdata == scan_sdata) 246 ret = -EBUSY; 247 } 248 249 /* 250 * More interface types could be added here but changing the 251 * address while powered makes the most sense in client modes. 252 */ 253 switch (sdata->vif.type) { 254 case NL80211_IFTYPE_STATION: 255 case NL80211_IFTYPE_P2P_CLIENT: 256 /* refuse while connecting */ 257 if (sdata->u.mgd.auth_data || sdata->u.mgd.assoc_data) 258 return -EBUSY; 259 break; 260 default: 261 ret = -EOPNOTSUPP; 262 } 263 264 unlock: 265 return ret; 266 } 267 268 static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata, 269 void *addr) 270 { 271 struct ieee80211_local *local = sdata->local; 272 struct sockaddr *sa = addr; 273 bool check_dup = true; 274 bool live = false; 275 int ret; 276 277 if (ieee80211_sdata_running(sdata)) { 278 ret = ieee80211_can_powered_addr_change(sdata); 279 if (ret) 280 return ret; 281 282 live = true; 283 } 284 285 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 286 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 287 check_dup = false; 288 289 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 290 if (ret) 291 return ret; 292 293 if (live) 294 drv_remove_interface(local, sdata); 295 ret = eth_mac_addr(sdata->dev, sa); 296 297 if (ret == 0) { 298 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 299 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 300 } 301 302 /* Regardless of eth_mac_addr() return we still want to add the 303 * interface back. This should not fail... 304 */ 305 if (live) 306 WARN_ON(drv_add_interface(local, sdata)); 307 308 return ret; 309 } 310 311 static int ieee80211_change_mac(struct net_device *dev, void *addr) 312 { 313 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 314 struct ieee80211_local *local = sdata->local; 315 316 /* 317 * This happens during unregistration if there's a bond device 318 * active (maybe other cases?) and we must get removed from it. 319 * But we really don't care anymore if it's not registered now. 320 */ 321 if (!dev->ieee80211_ptr->registered) 322 return 0; 323 324 guard(wiphy)(local->hw.wiphy); 325 326 return _ieee80211_change_mac(sdata, addr); 327 } 328 329 static inline int identical_mac_addr_allowed(int type1, int type2) 330 { 331 return type1 == NL80211_IFTYPE_MONITOR || 332 type2 == NL80211_IFTYPE_MONITOR || 333 type1 == NL80211_IFTYPE_P2P_DEVICE || 334 type2 == NL80211_IFTYPE_P2P_DEVICE || 335 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 336 (type1 == NL80211_IFTYPE_AP_VLAN && 337 (type2 == NL80211_IFTYPE_AP || 338 type2 == NL80211_IFTYPE_AP_VLAN)); 339 } 340 341 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 342 enum nl80211_iftype iftype) 343 { 344 struct ieee80211_local *local = sdata->local; 345 struct ieee80211_sub_if_data *nsdata; 346 347 ASSERT_RTNL(); 348 lockdep_assert_wiphy(local->hw.wiphy); 349 350 /* we hold the RTNL here so can safely walk the list */ 351 list_for_each_entry(nsdata, &local->interfaces, list) { 352 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 353 struct ieee80211_link_data *link; 354 355 /* 356 * Only OCB and monitor mode may coexist 357 */ 358 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 359 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 360 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 361 nsdata->vif.type == NL80211_IFTYPE_OCB)) 362 return -EBUSY; 363 364 /* 365 * Allow only a single IBSS interface to be up at any 366 * time. This is restricted because beacon distribution 367 * cannot work properly if both are in the same IBSS. 368 * 369 * To remove this restriction we'd have to disallow them 370 * from setting the same SSID on different IBSS interfaces 371 * belonging to the same hardware. Then, however, we're 372 * faced with having to adopt two different TSF timers... 373 */ 374 if (iftype == NL80211_IFTYPE_ADHOC && 375 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 376 return -EBUSY; 377 /* 378 * will not add another interface while any channel 379 * switch is active. 380 */ 381 for_each_link_data(nsdata, link) { 382 if (link->conf->csa_active) 383 return -EBUSY; 384 } 385 386 /* 387 * The remaining checks are only performed for interfaces 388 * with the same MAC address. 389 */ 390 if (!ether_addr_equal(sdata->vif.addr, 391 nsdata->vif.addr)) 392 continue; 393 394 /* 395 * check whether it may have the same address 396 */ 397 if (!identical_mac_addr_allowed(iftype, 398 nsdata->vif.type)) 399 return -ENOTUNIQ; 400 401 /* No support for VLAN with MLO yet */ 402 if (iftype == NL80211_IFTYPE_AP_VLAN && 403 sdata->wdev.use_4addr && 404 nsdata->vif.type == NL80211_IFTYPE_AP && 405 nsdata->vif.valid_links) 406 return -EOPNOTSUPP; 407 408 /* 409 * can only add VLANs to enabled APs 410 */ 411 if (iftype == NL80211_IFTYPE_AP_VLAN && 412 nsdata->vif.type == NL80211_IFTYPE_AP) 413 sdata->bss = &nsdata->u.ap; 414 } 415 } 416 417 return ieee80211_check_combinations(sdata, NULL, 0, 0, -1); 418 } 419 420 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 421 enum nl80211_iftype iftype) 422 { 423 int n_queues = sdata->local->hw.queues; 424 int i; 425 426 if (iftype == NL80211_IFTYPE_NAN) 427 return 0; 428 429 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 430 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 431 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 432 IEEE80211_INVAL_HW_QUEUE)) 433 return -EINVAL; 434 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 435 n_queues)) 436 return -EINVAL; 437 } 438 } 439 440 if ((iftype != NL80211_IFTYPE_AP && 441 iftype != NL80211_IFTYPE_P2P_GO && 442 iftype != NL80211_IFTYPE_MESH_POINT) || 443 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 444 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 445 return 0; 446 } 447 448 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 449 return -EINVAL; 450 451 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 452 return -EINVAL; 453 454 return 0; 455 } 456 457 static int ieee80211_open(struct net_device *dev) 458 { 459 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 460 int err; 461 462 /* fail early if user set an invalid address */ 463 if (!is_valid_ether_addr(dev->dev_addr)) 464 return -EADDRNOTAVAIL; 465 466 guard(wiphy)(sdata->local->hw.wiphy); 467 468 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 469 if (err) 470 return err; 471 472 return ieee80211_do_open(&sdata->wdev, true); 473 } 474 475 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) 476 { 477 struct ieee80211_local *local = sdata->local; 478 unsigned long flags; 479 struct sk_buff_head freeq; 480 struct sk_buff *skb, *tmp; 481 u32 hw_reconf_flags = 0; 482 int i, flushed; 483 struct ps_data *ps; 484 struct cfg80211_chan_def chandef; 485 bool cancel_scan; 486 struct cfg80211_nan_func *func; 487 488 lockdep_assert_wiphy(local->hw.wiphy); 489 490 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 491 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */ 492 493 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 494 if (cancel_scan) 495 ieee80211_scan_cancel(local); 496 497 ieee80211_roc_purge(local, sdata); 498 499 switch (sdata->vif.type) { 500 case NL80211_IFTYPE_STATION: 501 ieee80211_mgd_stop(sdata); 502 break; 503 case NL80211_IFTYPE_ADHOC: 504 ieee80211_ibss_stop(sdata); 505 break; 506 case NL80211_IFTYPE_MONITOR: 507 list_del_rcu(&sdata->u.mntr.list); 508 break; 509 case NL80211_IFTYPE_AP_VLAN: 510 ieee80211_apvlan_link_clear(sdata); 511 break; 512 default: 513 break; 514 } 515 516 /* 517 * Remove all stations associated with this interface. 518 * 519 * This must be done before calling ops->remove_interface() 520 * because otherwise we can later invoke ops->sta_notify() 521 * whenever the STAs are removed, and that invalidates driver 522 * assumptions about always getting a vif pointer that is valid 523 * (because if we remove a STA after ops->remove_interface() 524 * the driver will have removed the vif info already!) 525 * 526 * For AP_VLANs stations may exist since there's nothing else that 527 * would have removed them, but in other modes there shouldn't 528 * be any stations. 529 */ 530 flushed = sta_info_flush(sdata, -1); 531 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0); 532 533 /* don't count this interface for allmulti while it is down */ 534 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 535 atomic_dec(&local->iff_allmultis); 536 537 if (sdata->vif.type == NL80211_IFTYPE_AP) { 538 local->fif_pspoll--; 539 local->fif_probe_req--; 540 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 541 local->fif_probe_req--; 542 } 543 544 if (sdata->dev) { 545 netif_addr_lock_bh(sdata->dev); 546 spin_lock_bh(&local->filter_lock); 547 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 548 sdata->dev->addr_len); 549 spin_unlock_bh(&local->filter_lock); 550 netif_addr_unlock_bh(sdata->dev); 551 } 552 553 timer_delete_sync(&local->dynamic_ps_timer); 554 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 555 556 WARN(ieee80211_vif_is_mld(&sdata->vif), 557 "destroying interface with valid links 0x%04x\n", 558 sdata->vif.valid_links); 559 560 sdata->vif.bss_conf.csa_active = false; 561 if (sdata->vif.type == NL80211_IFTYPE_STATION) 562 sdata->deflink.u.mgd.csa.waiting_bcn = false; 563 ieee80211_vif_unblock_queues_csa(sdata); 564 565 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work); 566 wiphy_work_cancel(local->hw.wiphy, 567 &sdata->deflink.color_change_finalize_work); 568 wiphy_hrtimer_work_cancel(local->hw.wiphy, 569 &sdata->deflink.dfs_cac_timer_work); 570 571 if (sdata->wdev.links[0].cac_started) { 572 chandef = sdata->vif.bss_conf.chanreq.oper; 573 WARN_ON(local->suspended); 574 ieee80211_link_release_channel(&sdata->deflink); 575 cfg80211_cac_event(sdata->dev, &chandef, 576 NL80211_RADAR_CAC_ABORTED, 577 GFP_KERNEL, 0); 578 } 579 580 if (sdata->vif.type == NL80211_IFTYPE_AP) { 581 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 582 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 583 /* remove all packets in parent bc_buf pointing to this dev */ 584 ps = &sdata->bss->ps; 585 586 spin_lock_irqsave(&ps->bc_buf.lock, flags); 587 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 588 if (skb->dev == sdata->dev) { 589 __skb_unlink(skb, &ps->bc_buf); 590 local->total_ps_buffered--; 591 ieee80211_free_txskb(&local->hw, skb); 592 } 593 } 594 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 595 } 596 597 if (going_down) 598 local->open_count--; 599 600 switch (sdata->vif.type) { 601 case NL80211_IFTYPE_AP_VLAN: 602 list_del(&sdata->u.vlan.list); 603 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL); 604 /* see comment in the default case below */ 605 ieee80211_free_keys(sdata, true); 606 /* no need to tell driver */ 607 break; 608 case NL80211_IFTYPE_MONITOR: 609 local->monitors--; 610 611 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 612 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 613 614 local->virt_monitors--; 615 if (local->virt_monitors == 0) { 616 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 617 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 618 } 619 620 ieee80211_adjust_monitor_flags(sdata, -1); 621 } 622 break; 623 case NL80211_IFTYPE_NAN: 624 /* clean all the functions */ 625 spin_lock_bh(&sdata->u.nan.func_lock); 626 627 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) { 628 idr_remove(&sdata->u.nan.function_inst_ids, i); 629 cfg80211_free_nan_func(func); 630 } 631 idr_destroy(&sdata->u.nan.function_inst_ids); 632 633 spin_unlock_bh(&sdata->u.nan.func_lock); 634 break; 635 default: 636 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 637 /* 638 * When we get here, the interface is marked down. 639 * Free the remaining keys, if there are any 640 * (which can happen in AP mode if userspace sets 641 * keys before the interface is operating) 642 * 643 * Force the key freeing to always synchronize_net() 644 * to wait for the RX path in case it is using this 645 * interface enqueuing frames at this very time on 646 * another CPU. 647 */ 648 ieee80211_free_keys(sdata, true); 649 skb_queue_purge(&sdata->skb_queue); 650 skb_queue_purge(&sdata->status_queue); 651 } 652 653 /* 654 * Since ieee80211_free_txskb() may issue __dev_queue_xmit() 655 * which should be called with interrupts enabled, reclamation 656 * is done in two phases: 657 */ 658 __skb_queue_head_init(&freeq); 659 660 /* unlink from local queues... */ 661 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 662 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 663 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 665 if (info->control.vif == &sdata->vif) { 666 __skb_unlink(skb, &local->pending[i]); 667 __skb_queue_tail(&freeq, skb); 668 } 669 } 670 } 671 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 672 673 /* ... and perform actual reclamation with interrupts enabled. */ 674 skb_queue_walk_safe(&freeq, skb, tmp) { 675 __skb_unlink(skb, &freeq); 676 ieee80211_free_txskb(&local->hw, skb); 677 } 678 679 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 680 ieee80211_txq_remove_vlan(local, sdata); 681 682 if (sdata->vif.txq) 683 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 684 685 sdata->bss = NULL; 686 687 if (local->open_count == 0) 688 ieee80211_clear_tx_pending(local); 689 690 sdata->vif.bss_conf.beacon_int = 0; 691 692 /* 693 * If the interface goes down while suspended, presumably because 694 * the device was unplugged and that happens before our resume, 695 * then the driver is already unconfigured and the remainder of 696 * this function isn't needed. 697 * XXX: what about WoWLAN? If the device has software state, e.g. 698 * memory allocated, it might expect teardown commands from 699 * mac80211 here? 700 */ 701 if (local->suspended) { 702 WARN_ON(local->wowlan); 703 WARN_ON(rcu_access_pointer(local->monitor_sdata)); 704 return; 705 } 706 707 switch (sdata->vif.type) { 708 case NL80211_IFTYPE_AP_VLAN: 709 break; 710 case NL80211_IFTYPE_MONITOR: 711 if (local->virt_monitors == 0) 712 ieee80211_del_virtual_monitor(local); 713 714 ieee80211_recalc_idle(local); 715 ieee80211_recalc_offload(local); 716 717 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 718 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 719 break; 720 721 ieee80211_link_release_channel(&sdata->deflink); 722 fallthrough; 723 default: 724 if (!going_down) 725 break; 726 drv_remove_interface(local, sdata); 727 728 /* Clear private driver data to prevent reuse */ 729 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size); 730 } 731 732 ieee80211_recalc_ps(local); 733 734 if (cancel_scan) 735 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work); 736 737 if (local->open_count == 0) { 738 ieee80211_stop_device(local, false); 739 740 /* no reconfiguring after stop! */ 741 return; 742 } 743 744 /* do after stop to avoid reconfiguring when we stop anyway */ 745 ieee80211_configure_filter(local); 746 ieee80211_hw_config(local, -1, hw_reconf_flags); 747 748 /* Passing NULL means an interface is picked for configuration */ 749 if (local->virt_monitors == local->open_count) 750 ieee80211_add_virtual_monitor(local, NULL); 751 } 752 753 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata) 754 { 755 struct ieee80211_sub_if_data *tx_sdata; 756 struct ieee80211_bss_conf *link_conf, *tx_bss_conf; 757 struct ieee80211_link_data *tx_link, *link; 758 unsigned int link_id; 759 760 lockdep_assert_wiphy(sdata->local->hw.wiphy); 761 762 /* Check if any of the links of current sdata is an MBSSID. */ 763 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 764 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata); 765 if (!tx_bss_conf) 766 continue; 767 768 tx_sdata = vif_to_sdata(tx_bss_conf->vif); 769 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL); 770 771 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion 772 * while closing tx sdata at the end of outer loop below. 773 */ 774 if (sdata != tx_sdata) { 775 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id], 776 tx_sdata); 777 if (!tx_link) 778 continue; 779 780 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL); 781 } 782 783 /* loop through sdatas to find if any of their links 784 * belong to same MBSSID set as the one getting deleted. 785 */ 786 for_each_sdata_link(tx_sdata->local, link) { 787 struct ieee80211_sub_if_data *link_sdata = link->sdata; 788 789 if (link_sdata == sdata || link_sdata == tx_sdata || 790 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf) 791 continue; 792 793 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL); 794 795 /* Remove all links of matching MLD until dynamic link 796 * removal can be supported. 797 */ 798 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev, 799 GFP_KERNEL); 800 } 801 802 /* If we are not tx sdata, remove links of tx sdata and proceed */ 803 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) 804 cfg80211_stop_iface(tx_sdata->wdev.wiphy, 805 &tx_sdata->wdev, GFP_KERNEL); 806 } 807 } 808 809 static int ieee80211_stop(struct net_device *dev) 810 { 811 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 812 813 /* close dependent VLAN interfaces before locking wiphy */ 814 if (sdata->vif.type == NL80211_IFTYPE_AP) { 815 struct ieee80211_sub_if_data *vlan, *tmpsdata; 816 817 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 818 u.vlan.list) 819 dev_close(vlan->dev); 820 } 821 822 guard(wiphy)(sdata->local->hw.wiphy); 823 824 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work); 825 826 /* Close the dependent MBSSID interfaces with wiphy lock as we may be 827 * terminating its partner links too in case of MLD. 828 */ 829 if (sdata->vif.type == NL80211_IFTYPE_AP) 830 ieee80211_stop_mbssid(sdata); 831 832 ieee80211_do_stop(sdata, true); 833 834 return 0; 835 } 836 837 static void ieee80211_set_multicast_list(struct net_device *dev) 838 { 839 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 840 struct ieee80211_local *local = sdata->local; 841 int allmulti, sdata_allmulti; 842 843 allmulti = !!(dev->flags & IFF_ALLMULTI); 844 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 845 846 if (allmulti != sdata_allmulti) { 847 if (dev->flags & IFF_ALLMULTI) 848 atomic_inc(&local->iff_allmultis); 849 else 850 atomic_dec(&local->iff_allmultis); 851 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 852 } 853 854 spin_lock_bh(&local->filter_lock); 855 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 856 spin_unlock_bh(&local->filter_lock); 857 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter); 858 } 859 860 /* 861 * Called when the netdev is removed or, by the code below, before 862 * the interface type changes. 863 */ 864 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 865 { 866 if (WARN_ON(!list_empty(&sdata->work.entry))) 867 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 868 869 /* free extra data */ 870 ieee80211_free_keys(sdata, false); 871 872 ieee80211_debugfs_remove_netdev(sdata); 873 874 ieee80211_destroy_frag_cache(&sdata->frags); 875 876 if (ieee80211_vif_is_mesh(&sdata->vif)) 877 ieee80211_mesh_teardown_sdata(sdata); 878 879 ieee80211_vif_clear_links(sdata); 880 ieee80211_link_stop(&sdata->deflink); 881 } 882 883 static void ieee80211_uninit(struct net_device *dev) 884 { 885 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 886 } 887 888 static int ieee80211_netdev_setup_tc(struct net_device *dev, 889 enum tc_setup_type type, void *type_data) 890 { 891 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 892 struct ieee80211_local *local = sdata->local; 893 894 return drv_net_setup_tc(local, sdata, dev, type, type_data); 895 } 896 897 static const struct net_device_ops ieee80211_dataif_ops = { 898 .ndo_open = ieee80211_open, 899 .ndo_stop = ieee80211_stop, 900 .ndo_uninit = ieee80211_uninit, 901 .ndo_start_xmit = ieee80211_subif_start_xmit, 902 .ndo_set_rx_mode = ieee80211_set_multicast_list, 903 .ndo_set_mac_address = ieee80211_change_mac, 904 .ndo_setup_tc = ieee80211_netdev_setup_tc, 905 }; 906 907 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 908 struct sk_buff *skb, 909 struct net_device *sb_dev) 910 { 911 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 912 struct ieee80211_local *local = sdata->local; 913 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 914 struct ieee80211_hdr *hdr; 915 int len_rthdr; 916 917 if (local->hw.queues < IEEE80211_NUM_ACS) 918 return 0; 919 920 /* reset flags and info before parsing radiotap header */ 921 memset(info, 0, sizeof(*info)); 922 923 if (!ieee80211_parse_tx_radiotap(skb, dev)) 924 return 0; /* doesn't matter, frame will be dropped */ 925 926 len_rthdr = ieee80211_get_radiotap_len(skb->data); 927 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 928 if (skb->len < len_rthdr + 2 || 929 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 930 return 0; /* doesn't matter, frame will be dropped */ 931 932 return ieee80211_select_queue_80211(sdata, skb, hdr); 933 } 934 935 static const struct net_device_ops ieee80211_monitorif_ops = { 936 .ndo_open = ieee80211_open, 937 .ndo_stop = ieee80211_stop, 938 .ndo_uninit = ieee80211_uninit, 939 .ndo_start_xmit = ieee80211_monitor_start_xmit, 940 .ndo_set_rx_mode = ieee80211_set_multicast_list, 941 .ndo_set_mac_address = ieee80211_change_mac, 942 .ndo_select_queue = ieee80211_monitor_select_queue, 943 }; 944 945 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx, 946 struct net_device_path *path) 947 { 948 struct ieee80211_sub_if_data *sdata; 949 struct ieee80211_local *local; 950 struct sta_info *sta; 951 int ret = -ENOENT; 952 953 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev); 954 local = sdata->local; 955 956 if (!local->ops->net_fill_forward_path) 957 return -EOPNOTSUPP; 958 959 rcu_read_lock(); 960 switch (sdata->vif.type) { 961 case NL80211_IFTYPE_AP_VLAN: 962 sta = rcu_dereference(sdata->u.vlan.sta); 963 if (sta) 964 break; 965 if (sdata->wdev.use_4addr) 966 goto out; 967 if (is_multicast_ether_addr(ctx->daddr)) 968 goto out; 969 sta = sta_info_get_bss(sdata, ctx->daddr); 970 break; 971 case NL80211_IFTYPE_AP: 972 if (is_multicast_ether_addr(ctx->daddr)) 973 goto out; 974 sta = sta_info_get(sdata, ctx->daddr); 975 break; 976 case NL80211_IFTYPE_STATION: 977 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { 978 sta = sta_info_get(sdata, ctx->daddr); 979 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { 980 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 981 goto out; 982 983 break; 984 } 985 } 986 987 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 988 break; 989 default: 990 goto out; 991 } 992 993 if (!sta) 994 goto out; 995 996 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path); 997 out: 998 rcu_read_unlock(); 999 1000 return ret; 1001 } 1002 1003 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1004 .ndo_open = ieee80211_open, 1005 .ndo_stop = ieee80211_stop, 1006 .ndo_uninit = ieee80211_uninit, 1007 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1008 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1009 .ndo_set_mac_address = ieee80211_change_mac, 1010 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path, 1011 .ndo_setup_tc = ieee80211_netdev_setup_tc, 1012 }; 1013 1014 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 1015 { 1016 switch (iftype) { 1017 /* P2P GO and client are mapped to AP/STATION types */ 1018 case NL80211_IFTYPE_AP: 1019 case NL80211_IFTYPE_STATION: 1020 return true; 1021 default: 1022 return false; 1023 } 1024 } 1025 1026 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 1027 { 1028 struct ieee80211_local *local = sdata->local; 1029 u32 flags; 1030 1031 flags = sdata->vif.offload_flags; 1032 1033 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 1034 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1035 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 1036 1037 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1038 local->hw.wiphy->frag_threshold != (u32)-1) 1039 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1040 1041 if (local->virt_monitors) 1042 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1043 } else { 1044 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1045 } 1046 1047 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 1048 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1049 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 1050 1051 if (local->virt_monitors && 1052 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 1053 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1054 } else { 1055 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1056 } 1057 1058 if (sdata->vif.offload_flags == flags) 1059 return false; 1060 1061 sdata->vif.offload_flags = flags; 1062 ieee80211_check_fast_rx_iface(sdata); 1063 return true; 1064 } 1065 1066 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 1067 { 1068 struct ieee80211_local *local = sdata->local; 1069 struct ieee80211_sub_if_data *bss = sdata; 1070 bool enabled; 1071 1072 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1073 if (!sdata->bss) 1074 return; 1075 1076 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 1077 } 1078 1079 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 1080 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 1081 return; 1082 1083 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 1084 if (sdata->wdev.use_4addr && 1085 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 1086 enabled = false; 1087 1088 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 1089 &ieee80211_dataif_ops; 1090 } 1091 1092 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 1093 { 1094 struct ieee80211_local *local = sdata->local; 1095 struct ieee80211_sub_if_data *vsdata; 1096 1097 if (ieee80211_set_sdata_offload_flags(sdata)) { 1098 drv_update_vif_offload(local, sdata); 1099 ieee80211_set_vif_encap_ops(sdata); 1100 } 1101 1102 list_for_each_entry(vsdata, &local->interfaces, list) { 1103 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 1104 vsdata->bss != &sdata->u.ap) 1105 continue; 1106 1107 ieee80211_set_vif_encap_ops(vsdata); 1108 } 1109 } 1110 1111 void ieee80211_recalc_offload(struct ieee80211_local *local) 1112 { 1113 struct ieee80211_sub_if_data *sdata; 1114 1115 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 1116 return; 1117 1118 lockdep_assert_wiphy(local->hw.wiphy); 1119 1120 list_for_each_entry(sdata, &local->interfaces, list) { 1121 if (!ieee80211_sdata_running(sdata)) 1122 continue; 1123 1124 ieee80211_recalc_sdata_offload(sdata); 1125 } 1126 } 1127 1128 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 1129 const int offset) 1130 { 1131 struct ieee80211_local *local = sdata->local; 1132 u32 flags = sdata->u.mntr.flags; 1133 1134 #define ADJUST(_f, _s) do { \ 1135 if (flags & MONITOR_FLAG_##_f) \ 1136 local->fif_##_s += offset; \ 1137 } while (0) 1138 1139 ADJUST(FCSFAIL, fcsfail); 1140 ADJUST(PLCPFAIL, plcpfail); 1141 ADJUST(CONTROL, control); 1142 ADJUST(CONTROL, pspoll); 1143 ADJUST(OTHER_BSS, other_bss); 1144 if (!(flags & MONITOR_FLAG_SKIP_TX)) 1145 local->tx_mntrs += offset; 1146 1147 #undef ADJUST 1148 } 1149 1150 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 1151 { 1152 struct ieee80211_local *local = sdata->local; 1153 int i; 1154 1155 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 1156 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 1157 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 1158 else if (local->hw.queues >= IEEE80211_NUM_ACS) 1159 sdata->vif.hw_queue[i] = i; 1160 else 1161 sdata->vif.hw_queue[i] = 0; 1162 } 1163 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 1164 } 1165 1166 static void ieee80211_sdata_init(struct ieee80211_local *local, 1167 struct ieee80211_sub_if_data *sdata) 1168 { 1169 sdata->local = local; 1170 1171 INIT_LIST_HEAD(&sdata->key_list); 1172 1173 /* 1174 * Initialize the default link, so we can use link_id 0 for non-MLD, 1175 * and that continues to work for non-MLD-aware drivers that use just 1176 * vif.bss_conf instead of vif.link_conf. 1177 * 1178 * Note that we never change this, so if link ID 0 isn't used in an 1179 * MLD connection, we get a separate allocation for it. 1180 */ 1181 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf); 1182 } 1183 1184 int ieee80211_add_virtual_monitor(struct ieee80211_local *local, 1185 struct ieee80211_sub_if_data *creator_sdata) 1186 { 1187 struct ieee80211_sub_if_data *sdata; 1188 int ret; 1189 1190 ASSERT_RTNL(); 1191 lockdep_assert_wiphy(local->hw.wiphy); 1192 1193 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1194 return 0; 1195 1196 /* Already have a monitor set up, configure it */ 1197 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 1198 if (sdata) 1199 goto configure_monitor; 1200 1201 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 1202 if (!sdata) 1203 return -ENOMEM; 1204 1205 /* set up data */ 1206 sdata->vif.type = NL80211_IFTYPE_MONITOR; 1207 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 1208 wiphy_name(local->hw.wiphy)); 1209 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 1210 sdata->wdev.wiphy = local->hw.wiphy; 1211 1212 ieee80211_sdata_init(local, sdata); 1213 1214 ieee80211_set_default_queues(sdata); 1215 1216 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) { 1217 ret = drv_add_interface(local, sdata); 1218 if (WARN_ON(ret)) { 1219 /* ok .. stupid driver, it asked for this! */ 1220 kfree(sdata); 1221 return ret; 1222 } 1223 } 1224 1225 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 1226 if (ret) { 1227 kfree(sdata); 1228 return ret; 1229 } 1230 1231 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1232 1233 mutex_lock(&local->iflist_mtx); 1234 rcu_assign_pointer(local->monitor_sdata, sdata); 1235 mutex_unlock(&local->iflist_mtx); 1236 1237 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq, 1238 IEEE80211_CHANCTX_EXCLUSIVE); 1239 if (ret) { 1240 mutex_lock(&local->iflist_mtx); 1241 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1242 mutex_unlock(&local->iflist_mtx); 1243 synchronize_net(); 1244 drv_remove_interface(local, sdata); 1245 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1246 kfree(sdata); 1247 return ret; 1248 } 1249 1250 skb_queue_head_init(&sdata->skb_queue); 1251 skb_queue_head_init(&sdata->status_queue); 1252 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1253 1254 configure_monitor: 1255 /* Copy in the MU-MIMO configuration if set */ 1256 if (!creator_sdata) { 1257 struct ieee80211_sub_if_data *other; 1258 1259 list_for_each_entry_rcu(other, &local->mon_list, u.mntr.list) { 1260 if (!other->vif.bss_conf.mu_mimo_owner) 1261 continue; 1262 1263 creator_sdata = other; 1264 break; 1265 } 1266 } 1267 1268 if (creator_sdata && creator_sdata->vif.bss_conf.mu_mimo_owner) { 1269 sdata->vif.bss_conf.mu_mimo_owner = true; 1270 memcpy(&sdata->vif.bss_conf.mu_group, 1271 &creator_sdata->vif.bss_conf.mu_group, 1272 sizeof(sdata->vif.bss_conf.mu_group)); 1273 memcpy(&sdata->u.mntr.mu_follow_addr, 1274 creator_sdata->u.mntr.mu_follow_addr, ETH_ALEN); 1275 1276 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1277 BSS_CHANGED_MU_GROUPS); 1278 } 1279 1280 return 0; 1281 } 1282 1283 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 1284 { 1285 struct ieee80211_sub_if_data *sdata; 1286 1287 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1288 return; 1289 1290 ASSERT_RTNL(); 1291 lockdep_assert_wiphy(local->hw.wiphy); 1292 1293 mutex_lock(&local->iflist_mtx); 1294 1295 sdata = rcu_dereference_protected(local->monitor_sdata, 1296 lockdep_is_held(&local->iflist_mtx)); 1297 if (!sdata) { 1298 mutex_unlock(&local->iflist_mtx); 1299 return; 1300 } 1301 1302 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1303 ieee80211_link_release_channel(&sdata->deflink); 1304 1305 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1306 drv_remove_interface(local, sdata); 1307 1308 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1309 mutex_unlock(&local->iflist_mtx); 1310 1311 synchronize_net(); 1312 1313 kfree(sdata); 1314 } 1315 1316 /* 1317 * NOTE: Be very careful when changing this function, it must NOT return 1318 * an error on interface type changes that have been pre-checked, so most 1319 * checks should be in ieee80211_check_concurrent_iface. 1320 */ 1321 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1322 { 1323 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1324 struct net_device *dev = wdev->netdev; 1325 struct ieee80211_local *local = sdata->local; 1326 u64 changed = 0; 1327 int res; 1328 u32 hw_reconf_flags = 0; 1329 1330 lockdep_assert_wiphy(local->hw.wiphy); 1331 1332 switch (sdata->vif.type) { 1333 case NL80211_IFTYPE_AP_VLAN: { 1334 struct ieee80211_sub_if_data *master; 1335 1336 if (!sdata->bss) 1337 return -ENOLINK; 1338 1339 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1340 1341 master = container_of(sdata->bss, 1342 struct ieee80211_sub_if_data, u.ap); 1343 sdata->control_port_protocol = 1344 master->control_port_protocol; 1345 sdata->control_port_no_encrypt = 1346 master->control_port_no_encrypt; 1347 sdata->control_port_over_nl80211 = 1348 master->control_port_over_nl80211; 1349 sdata->control_port_no_preauth = 1350 master->control_port_no_preauth; 1351 sdata->vif.cab_queue = master->vif.cab_queue; 1352 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1353 sizeof(sdata->vif.hw_queue)); 1354 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq; 1355 1356 sdata->crypto_tx_tailroom_needed_cnt += 1357 master->crypto_tx_tailroom_needed_cnt; 1358 1359 ieee80211_apvlan_link_setup(sdata); 1360 1361 break; 1362 } 1363 case NL80211_IFTYPE_AP: 1364 case NL80211_IFTYPE_MESH_POINT: 1365 case NL80211_IFTYPE_STATION: 1366 case NL80211_IFTYPE_MONITOR: 1367 case NL80211_IFTYPE_ADHOC: 1368 case NL80211_IFTYPE_P2P_DEVICE: 1369 case NL80211_IFTYPE_OCB: 1370 case NL80211_IFTYPE_NAN: 1371 case NL80211_IFTYPE_NAN_DATA: 1372 /* no special treatment */ 1373 break; 1374 case NL80211_IFTYPE_UNSPECIFIED: 1375 case NUM_NL80211_IFTYPES: 1376 case NL80211_IFTYPE_P2P_CLIENT: 1377 case NL80211_IFTYPE_P2P_GO: 1378 case NL80211_IFTYPE_WDS: 1379 /* cannot happen */ 1380 WARN_ON(1); 1381 break; 1382 } 1383 1384 if (local->open_count == 0) { 1385 /* here we can consider everything in good order (again) */ 1386 local->reconfig_failure = false; 1387 1388 res = drv_start(local); 1389 if (res) { 1390 /* 1391 * no need to worry about AP_VLAN cleanup since in that 1392 * case we can't have open_count == 0 1393 */ 1394 return res; 1395 } 1396 ieee80211_led_radio(local, true); 1397 ieee80211_mod_tpt_led_trig(local, 1398 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1399 } 1400 1401 /* 1402 * Copy the hopefully now-present MAC address to 1403 * this interface, if it has the special null one. 1404 */ 1405 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1406 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr); 1407 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1408 1409 if (!is_valid_ether_addr(dev->dev_addr)) { 1410 res = -EADDRNOTAVAIL; 1411 goto err_stop; 1412 } 1413 } 1414 1415 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR || 1416 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE); 1417 switch (sdata->vif.type) { 1418 case NL80211_IFTYPE_AP_VLAN: 1419 /* no need to tell driver, but set carrier and chanctx */ 1420 if (sdata->bss->active) { 1421 struct ieee80211_link_data *link; 1422 1423 for_each_link_data(sdata, link) { 1424 ieee80211_link_vlan_copy_chanctx(link); 1425 } 1426 1427 netif_carrier_on(dev); 1428 ieee80211_set_vif_encap_ops(sdata); 1429 } else { 1430 netif_carrier_off(dev); 1431 } 1432 break; 1433 case NL80211_IFTYPE_MONITOR: 1434 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) || 1435 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 1436 res = drv_add_interface(local, sdata); 1437 if (res) 1438 goto err_stop; 1439 } else { 1440 /* add/configure if there is no non-monitor interface */ 1441 if (local->virt_monitors == local->open_count) { 1442 res = ieee80211_add_virtual_monitor(local, sdata); 1443 if (res) 1444 goto err_stop; 1445 } 1446 1447 local->virt_monitors++; 1448 1449 /* must be before the call to ieee80211_configure_filter */ 1450 if (local->virt_monitors == 1) { 1451 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1452 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1453 } 1454 } 1455 1456 local->monitors++; 1457 1458 ieee80211_adjust_monitor_flags(sdata, 1); 1459 ieee80211_configure_filter(local); 1460 ieee80211_recalc_offload(local); 1461 ieee80211_recalc_idle(local); 1462 1463 netif_carrier_on(dev); 1464 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1465 break; 1466 case NL80211_IFTYPE_AP: 1467 sdata->bss = &sdata->u.ap; 1468 fallthrough; 1469 default: 1470 if (coming_up) { 1471 ieee80211_del_virtual_monitor(local); 1472 ieee80211_set_sdata_offload_flags(sdata); 1473 1474 res = drv_add_interface(local, sdata); 1475 if (res) 1476 goto err_stop; 1477 1478 ieee80211_set_vif_encap_ops(sdata); 1479 res = ieee80211_check_queues(sdata, 1480 ieee80211_vif_type_p2p(&sdata->vif)); 1481 if (res) 1482 goto err_del_interface; 1483 } 1484 1485 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1486 local->fif_pspoll++; 1487 local->fif_probe_req++; 1488 1489 ieee80211_configure_filter(local); 1490 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1491 local->fif_probe_req++; 1492 } 1493 1494 if (sdata->vif.probe_req_reg) 1495 drv_config_iface_filter(local, sdata, 1496 FIF_PROBE_REQ, 1497 FIF_PROBE_REQ); 1498 1499 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1500 sdata->vif.type != NL80211_IFTYPE_NAN) 1501 changed |= ieee80211_reset_erp_info(sdata); 1502 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1503 changed); 1504 1505 switch (sdata->vif.type) { 1506 case NL80211_IFTYPE_STATION: 1507 case NL80211_IFTYPE_ADHOC: 1508 case NL80211_IFTYPE_AP: 1509 case NL80211_IFTYPE_MESH_POINT: 1510 case NL80211_IFTYPE_OCB: 1511 netif_carrier_off(dev); 1512 break; 1513 case NL80211_IFTYPE_P2P_DEVICE: 1514 case NL80211_IFTYPE_NAN: 1515 break; 1516 default: 1517 /* not reached */ 1518 WARN_ON(1); 1519 } 1520 1521 /* 1522 * Set default queue parameters so drivers don't 1523 * need to initialise the hardware if the hardware 1524 * doesn't start up with sane defaults. 1525 * Enable QoS for anything but station interfaces. 1526 */ 1527 ieee80211_set_wmm_default(&sdata->deflink, true, 1528 sdata->vif.type != NL80211_IFTYPE_STATION); 1529 } 1530 1531 /* 1532 * set_multicast_list will be invoked by the networking core 1533 * which will check whether any increments here were done in 1534 * error and sync them down to the hardware as filter flags. 1535 */ 1536 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1537 atomic_inc(&local->iff_allmultis); 1538 1539 if (coming_up) 1540 local->open_count++; 1541 1542 if (local->open_count == 1) 1543 ieee80211_hw_conf_init(local); 1544 else if (hw_reconf_flags) 1545 ieee80211_hw_config(local, -1, hw_reconf_flags); 1546 1547 ieee80211_recalc_ps(local); 1548 1549 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1550 1551 return 0; 1552 err_del_interface: 1553 drv_remove_interface(local, sdata); 1554 err_stop: 1555 if (!local->open_count) 1556 drv_stop(local, false); 1557 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1558 list_del(&sdata->u.vlan.list); 1559 /* Might not be initialized yet, but it is harmless */ 1560 sdata->bss = NULL; 1561 return res; 1562 } 1563 1564 static void ieee80211_if_setup(struct net_device *dev) 1565 { 1566 ether_setup(dev); 1567 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1568 dev->priv_flags |= IFF_NO_QUEUE; 1569 dev->netdev_ops = &ieee80211_dataif_ops; 1570 dev->needs_free_netdev = true; 1571 } 1572 1573 static void ieee80211_iface_process_skb(struct ieee80211_local *local, 1574 struct ieee80211_sub_if_data *sdata, 1575 struct sk_buff *skb) 1576 { 1577 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1578 1579 lockdep_assert_wiphy(local->hw.wiphy); 1580 1581 if (ieee80211_is_action(mgmt->frame_control) && 1582 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1583 struct sta_info *sta; 1584 int len = skb->len; 1585 1586 sta = sta_info_get_bss(sdata, mgmt->sa); 1587 if (sta) { 1588 switch (mgmt->u.action.action_code) { 1589 case WLAN_ACTION_ADDBA_REQ: 1590 case WLAN_ACTION_NDP_ADDBA_REQ: 1591 ieee80211_process_addba_request(local, sta, 1592 mgmt, len); 1593 break; 1594 case WLAN_ACTION_ADDBA_RESP: 1595 case WLAN_ACTION_NDP_ADDBA_RESP: 1596 ieee80211_process_addba_resp(local, sta, 1597 mgmt, len); 1598 break; 1599 case WLAN_ACTION_DELBA: 1600 case WLAN_ACTION_NDP_DELBA: 1601 ieee80211_process_delba(sdata, sta, 1602 mgmt, len); 1603 break; 1604 default: 1605 WARN_ON(1); 1606 break; 1607 } 1608 } 1609 } else if (ieee80211_is_action(mgmt->frame_control) && 1610 mgmt->u.action.category == WLAN_CATEGORY_HT) { 1611 switch (mgmt->u.action.action_code) { 1612 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { 1613 u8 chanwidth = mgmt->u.action.ht_notify_cw.chanwidth; 1614 struct ieee80211_rx_status *status; 1615 struct link_sta_info *link_sta; 1616 struct sta_info *sta; 1617 1618 sta = sta_info_get_bss(sdata, mgmt->sa); 1619 if (!sta) 1620 break; 1621 1622 status = IEEE80211_SKB_RXCB(skb); 1623 if (!status->link_valid) 1624 link_sta = &sta->deflink; 1625 else 1626 link_sta = rcu_dereference_protected(sta->link[status->link_id], 1627 lockdep_is_held(&local->hw.wiphy->mtx)); 1628 if (link_sta) 1629 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta, 1630 link_sta, chanwidth, 1631 status->band); 1632 break; 1633 } 1634 default: 1635 WARN_ON(1); 1636 break; 1637 } 1638 } else if (ieee80211_is_action(mgmt->frame_control) && 1639 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1640 switch (mgmt->u.action.action_code) { 1641 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1642 struct ieee80211_rx_status *status; 1643 enum nl80211_band band; 1644 struct sta_info *sta; 1645 u8 opmode; 1646 1647 status = IEEE80211_SKB_RXCB(skb); 1648 band = status->band; 1649 opmode = mgmt->u.action.vht_opmode_notif.operating_mode; 1650 1651 sta = sta_info_get_bss(sdata, mgmt->sa); 1652 1653 if (sta) 1654 ieee80211_vht_handle_opmode(sdata, 1655 &sta->deflink, 1656 opmode, band); 1657 1658 break; 1659 } 1660 case WLAN_VHT_ACTION_GROUPID_MGMT: 1661 ieee80211_process_mu_groups(sdata, &sdata->deflink, 1662 mgmt); 1663 break; 1664 default: 1665 WARN_ON(1); 1666 break; 1667 } 1668 } else if (ieee80211_is_action(mgmt->frame_control) && 1669 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1670 switch (mgmt->u.action.action_code) { 1671 case WLAN_S1G_TWT_TEARDOWN: 1672 case WLAN_S1G_TWT_SETUP: 1673 ieee80211_s1g_rx_twt_action(sdata, skb); 1674 break; 1675 default: 1676 break; 1677 } 1678 } else if (ieee80211_is_action(mgmt->frame_control) && 1679 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) { 1680 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1681 switch (mgmt->u.action.action_code) { 1682 case WLAN_PROTECTED_EHT_ACTION_EML_OP_MODE_NOTIF: 1683 ieee80211_rx_eml_op_mode_notif(sdata, skb); 1684 break; 1685 default: 1686 break; 1687 } 1688 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { 1689 switch (mgmt->u.action.action_code) { 1690 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ: 1691 ieee80211_process_neg_ttlm_req(sdata, mgmt, 1692 skb->len); 1693 break; 1694 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES: 1695 ieee80211_process_neg_ttlm_res(sdata, mgmt, 1696 skb->len); 1697 break; 1698 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN: 1699 ieee80211_process_ttlm_teardown(sdata); 1700 break; 1701 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP: 1702 ieee80211_process_ml_reconf_resp(sdata, mgmt, 1703 skb->len); 1704 break; 1705 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP: 1706 ieee80211_process_epcs_ena_resp(sdata, mgmt, 1707 skb->len); 1708 break; 1709 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN: 1710 ieee80211_process_epcs_teardown(sdata, mgmt, 1711 skb->len); 1712 break; 1713 default: 1714 break; 1715 } 1716 } 1717 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1718 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1719 ieee80211_sta_rx_queued_ext(sdata, skb); 1720 else 1721 WARN_ON(1); 1722 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1723 struct ieee80211_hdr *hdr = (void *)mgmt; 1724 struct sta_info *sta; 1725 1726 /* 1727 * So the frame isn't mgmt, but frame_control 1728 * is at the right place anyway, of course, so 1729 * the if statement is correct. 1730 * 1731 * Warn if we have other data frame types here, 1732 * they must not get here. 1733 */ 1734 WARN_ON(hdr->frame_control & 1735 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1736 WARN_ON(!(hdr->seq_ctrl & 1737 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1738 /* 1739 * This was a fragment of a frame, received while 1740 * a block-ack session was active. That cannot be 1741 * right, so terminate the session. 1742 */ 1743 sta = sta_info_get_bss(sdata, mgmt->sa); 1744 if (sta) { 1745 u16 tid = ieee80211_get_tid(hdr); 1746 1747 __ieee80211_stop_rx_ba_session( 1748 sta, tid, WLAN_BACK_RECIPIENT, 1749 WLAN_REASON_QSTA_REQUIRE_SETUP, 1750 true); 1751 } 1752 } else switch (sdata->vif.type) { 1753 case NL80211_IFTYPE_STATION: 1754 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1755 break; 1756 case NL80211_IFTYPE_ADHOC: 1757 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1758 break; 1759 case NL80211_IFTYPE_MESH_POINT: 1760 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1761 break; 1762 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1763 break; 1764 default: 1765 WARN(1, "frame for unexpected interface type"); 1766 break; 1767 } 1768 } 1769 1770 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata, 1771 struct sk_buff *skb) 1772 { 1773 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1774 1775 if (ieee80211_is_action(mgmt->frame_control) && 1776 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1777 switch (mgmt->u.action.action_code) { 1778 case WLAN_S1G_TWT_TEARDOWN: 1779 case WLAN_S1G_TWT_SETUP: 1780 ieee80211_s1g_status_twt_action(sdata, skb); 1781 break; 1782 default: 1783 break; 1784 } 1785 } 1786 } 1787 1788 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work) 1789 { 1790 struct ieee80211_sub_if_data *sdata = 1791 container_of(work, struct ieee80211_sub_if_data, work); 1792 struct ieee80211_local *local = sdata->local; 1793 struct sk_buff *skb; 1794 1795 if (!ieee80211_sdata_running(sdata)) 1796 return; 1797 1798 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1799 return; 1800 1801 if (!ieee80211_can_run_worker(local)) 1802 return; 1803 1804 /* first process frames */ 1805 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1806 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1807 1808 if (skb->protocol == cpu_to_be16(ETH_P_TDLS)) 1809 ieee80211_process_tdls_channel_switch(sdata, skb); 1810 else 1811 ieee80211_iface_process_skb(local, sdata, skb); 1812 1813 consume_skb(skb); 1814 kcov_remote_stop(); 1815 } 1816 1817 /* process status queue */ 1818 while ((skb = skb_dequeue(&sdata->status_queue))) { 1819 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1820 1821 ieee80211_iface_process_status(sdata, skb); 1822 consume_skb(skb); 1823 1824 kcov_remote_stop(); 1825 } 1826 1827 /* then other type-dependent work */ 1828 switch (sdata->vif.type) { 1829 case NL80211_IFTYPE_STATION: 1830 ieee80211_sta_work(sdata); 1831 break; 1832 case NL80211_IFTYPE_ADHOC: 1833 ieee80211_ibss_work(sdata); 1834 break; 1835 case NL80211_IFTYPE_MESH_POINT: 1836 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1837 break; 1838 ieee80211_mesh_work(sdata); 1839 break; 1840 case NL80211_IFTYPE_OCB: 1841 ieee80211_ocb_work(sdata); 1842 break; 1843 default: 1844 break; 1845 } 1846 } 1847 1848 static void ieee80211_activate_links_work(struct wiphy *wiphy, 1849 struct wiphy_work *work) 1850 { 1851 struct ieee80211_sub_if_data *sdata = 1852 container_of(work, struct ieee80211_sub_if_data, 1853 activate_links_work); 1854 struct ieee80211_local *local = wiphy_priv(wiphy); 1855 1856 if (local->in_reconfig) 1857 return; 1858 1859 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links); 1860 sdata->desired_active_links = 0; 1861 } 1862 1863 /* 1864 * Helper function to initialise an interface to a specific type. 1865 */ 1866 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1867 enum nl80211_iftype type) 1868 { 1869 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1870 0xff, 0xff, 0xff}; 1871 1872 /* clear type-dependent unions */ 1873 memset(&sdata->u, 0, sizeof(sdata->u)); 1874 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u)); 1875 1876 /* and set some type-dependent values */ 1877 sdata->vif.type = type; 1878 sdata->vif.p2p = false; 1879 sdata->wdev.iftype = type; 1880 1881 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1882 sdata->control_port_no_encrypt = false; 1883 sdata->control_port_over_nl80211 = false; 1884 sdata->control_port_no_preauth = false; 1885 sdata->vif.cfg.idle = true; 1886 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1887 1888 sdata->noack_map = 0; 1889 1890 /* only monitor/p2p-device differ */ 1891 if (sdata->dev) { 1892 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1893 sdata->dev->type = ARPHRD_ETHER; 1894 } 1895 1896 skb_queue_head_init(&sdata->skb_queue); 1897 skb_queue_head_init(&sdata->status_queue); 1898 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1899 wiphy_work_init(&sdata->activate_links_work, 1900 ieee80211_activate_links_work); 1901 1902 switch (type) { 1903 case NL80211_IFTYPE_P2P_GO: 1904 type = NL80211_IFTYPE_AP; 1905 sdata->vif.type = type; 1906 sdata->vif.p2p = true; 1907 fallthrough; 1908 case NL80211_IFTYPE_AP: 1909 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1910 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1911 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1912 break; 1913 case NL80211_IFTYPE_P2P_CLIENT: 1914 type = NL80211_IFTYPE_STATION; 1915 sdata->vif.type = type; 1916 sdata->vif.p2p = true; 1917 fallthrough; 1918 case NL80211_IFTYPE_STATION: 1919 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid; 1920 ieee80211_sta_setup_sdata(sdata); 1921 break; 1922 case NL80211_IFTYPE_OCB: 1923 sdata->vif.bss_conf.bssid = bssid_wildcard; 1924 ieee80211_ocb_setup_sdata(sdata); 1925 break; 1926 case NL80211_IFTYPE_ADHOC: 1927 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1928 ieee80211_ibss_setup_sdata(sdata); 1929 break; 1930 case NL80211_IFTYPE_MESH_POINT: 1931 if (ieee80211_vif_is_mesh(&sdata->vif)) 1932 ieee80211_mesh_init_sdata(sdata); 1933 break; 1934 case NL80211_IFTYPE_MONITOR: 1935 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1936 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1937 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1938 MONITOR_FLAG_OTHER_BSS; 1939 break; 1940 case NL80211_IFTYPE_NAN: 1941 idr_init(&sdata->u.nan.function_inst_ids); 1942 spin_lock_init(&sdata->u.nan.func_lock); 1943 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1944 break; 1945 case NL80211_IFTYPE_AP_VLAN: 1946 case NL80211_IFTYPE_P2P_DEVICE: 1947 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1948 break; 1949 case NL80211_IFTYPE_NAN_DATA: 1950 break; 1951 case NL80211_IFTYPE_UNSPECIFIED: 1952 case NL80211_IFTYPE_WDS: 1953 case NUM_NL80211_IFTYPES: 1954 WARN_ON(1); 1955 break; 1956 } 1957 1958 /* need to do this after the switch so vif.type is correct */ 1959 ieee80211_link_setup(&sdata->deflink); 1960 1961 ieee80211_debugfs_recreate_netdev(sdata, false); 1962 } 1963 1964 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1965 enum nl80211_iftype type) 1966 { 1967 struct ieee80211_local *local = sdata->local; 1968 int ret, err; 1969 enum nl80211_iftype internal_type = type; 1970 bool p2p = false; 1971 1972 ASSERT_RTNL(); 1973 1974 if (!local->ops->change_interface) 1975 return -EBUSY; 1976 1977 /* for now, don't support changing while links exist */ 1978 if (ieee80211_vif_is_mld(&sdata->vif)) 1979 return -EBUSY; 1980 1981 switch (sdata->vif.type) { 1982 case NL80211_IFTYPE_AP: 1983 if (!list_empty(&sdata->u.ap.vlans)) 1984 return -EBUSY; 1985 break; 1986 case NL80211_IFTYPE_STATION: 1987 case NL80211_IFTYPE_ADHOC: 1988 case NL80211_IFTYPE_OCB: 1989 /* 1990 * Could maybe also all others here? 1991 * Just not sure how that interacts 1992 * with the RX/config path e.g. for 1993 * mesh. 1994 */ 1995 break; 1996 default: 1997 return -EBUSY; 1998 } 1999 2000 switch (type) { 2001 case NL80211_IFTYPE_AP: 2002 case NL80211_IFTYPE_STATION: 2003 case NL80211_IFTYPE_ADHOC: 2004 case NL80211_IFTYPE_OCB: 2005 /* 2006 * Could probably support everything 2007 * but here. 2008 */ 2009 break; 2010 case NL80211_IFTYPE_P2P_CLIENT: 2011 p2p = true; 2012 internal_type = NL80211_IFTYPE_STATION; 2013 break; 2014 case NL80211_IFTYPE_P2P_GO: 2015 p2p = true; 2016 internal_type = NL80211_IFTYPE_AP; 2017 break; 2018 default: 2019 return -EBUSY; 2020 } 2021 2022 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 2023 if (ret) 2024 return ret; 2025 2026 ieee80211_stop_vif_queues(local, sdata, 2027 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2028 /* do_stop will synchronize_rcu() first thing */ 2029 ieee80211_do_stop(sdata, false); 2030 2031 ieee80211_teardown_sdata(sdata); 2032 2033 ieee80211_set_sdata_offload_flags(sdata); 2034 ret = drv_change_interface(local, sdata, internal_type, p2p); 2035 if (ret) 2036 type = ieee80211_vif_type_p2p(&sdata->vif); 2037 2038 /* 2039 * Ignore return value here, there's not much we can do since 2040 * the driver changed the interface type internally already. 2041 * The warnings will hopefully make driver authors fix it :-) 2042 */ 2043 ieee80211_check_queues(sdata, type); 2044 2045 ieee80211_setup_sdata(sdata, type); 2046 ieee80211_set_vif_encap_ops(sdata); 2047 2048 err = ieee80211_do_open(&sdata->wdev, false); 2049 WARN(err, "type change: do_open returned %d", err); 2050 2051 ieee80211_wake_vif_queues(local, sdata, 2052 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2053 return ret; 2054 } 2055 2056 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 2057 enum nl80211_iftype type) 2058 { 2059 int ret; 2060 2061 ASSERT_RTNL(); 2062 2063 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 2064 return 0; 2065 2066 if (ieee80211_sdata_running(sdata)) { 2067 ret = ieee80211_runtime_change_iftype(sdata, type); 2068 if (ret) 2069 return ret; 2070 } else { 2071 /* Purge and reset type-dependent state. */ 2072 ieee80211_teardown_sdata(sdata); 2073 ieee80211_setup_sdata(sdata, type); 2074 } 2075 2076 /* reset some values that shouldn't be kept across type changes */ 2077 if (type == NL80211_IFTYPE_STATION) 2078 sdata->u.mgd.use_4addr = false; 2079 2080 return 0; 2081 } 2082 2083 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 2084 u8 *perm_addr, enum nl80211_iftype type) 2085 { 2086 struct ieee80211_sub_if_data *sdata; 2087 u64 mask, start, addr, val, inc; 2088 u8 *m; 2089 u8 tmp_addr[ETH_ALEN]; 2090 int i; 2091 2092 lockdep_assert_wiphy(local->hw.wiphy); 2093 2094 /* default ... something at least */ 2095 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 2096 2097 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 2098 local->hw.wiphy->n_addresses <= 1) 2099 return; 2100 2101 switch (type) { 2102 case NL80211_IFTYPE_MONITOR: 2103 /* doesn't matter */ 2104 break; 2105 case NL80211_IFTYPE_AP_VLAN: 2106 /* match up with an AP interface */ 2107 list_for_each_entry(sdata, &local->interfaces, list) { 2108 if (sdata->vif.type != NL80211_IFTYPE_AP) 2109 continue; 2110 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2111 break; 2112 } 2113 /* keep default if no AP interface present */ 2114 break; 2115 case NL80211_IFTYPE_P2P_CLIENT: 2116 case NL80211_IFTYPE_P2P_GO: 2117 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 2118 list_for_each_entry(sdata, &local->interfaces, list) { 2119 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 2120 continue; 2121 if (!ieee80211_sdata_running(sdata)) 2122 continue; 2123 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2124 return; 2125 } 2126 } 2127 fallthrough; 2128 default: 2129 /* assign a new address if possible -- try n_addresses first */ 2130 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 2131 bool used = false; 2132 2133 list_for_each_entry(sdata, &local->interfaces, list) { 2134 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 2135 sdata->vif.addr)) { 2136 used = true; 2137 break; 2138 } 2139 } 2140 2141 if (!used) { 2142 memcpy(perm_addr, 2143 local->hw.wiphy->addresses[i].addr, 2144 ETH_ALEN); 2145 break; 2146 } 2147 } 2148 2149 /* try mask if available */ 2150 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 2151 break; 2152 2153 m = local->hw.wiphy->addr_mask; 2154 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2155 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2156 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2157 2158 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 2159 /* not a contiguous mask ... not handled now! */ 2160 pr_info("not contiguous\n"); 2161 break; 2162 } 2163 2164 /* 2165 * Pick address of existing interface in case user changed 2166 * MAC address manually, default to perm_addr. 2167 */ 2168 m = local->hw.wiphy->perm_addr; 2169 list_for_each_entry(sdata, &local->interfaces, list) { 2170 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 2171 continue; 2172 m = sdata->vif.addr; 2173 break; 2174 } 2175 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2178 2179 inc = 1ULL<<__ffs64(mask); 2180 val = (start & mask); 2181 addr = (start & ~mask) | (val & mask); 2182 do { 2183 bool used = false; 2184 2185 tmp_addr[5] = addr >> 0*8; 2186 tmp_addr[4] = addr >> 1*8; 2187 tmp_addr[3] = addr >> 2*8; 2188 tmp_addr[2] = addr >> 3*8; 2189 tmp_addr[1] = addr >> 4*8; 2190 tmp_addr[0] = addr >> 5*8; 2191 2192 val += inc; 2193 2194 list_for_each_entry(sdata, &local->interfaces, list) { 2195 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 2196 used = true; 2197 break; 2198 } 2199 } 2200 2201 if (!used) { 2202 memcpy(perm_addr, tmp_addr, ETH_ALEN); 2203 break; 2204 } 2205 addr = (start & ~mask) | (val & mask); 2206 } while (addr != start); 2207 2208 break; 2209 } 2210 } 2211 2212 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 2213 unsigned char name_assign_type, 2214 struct wireless_dev **new_wdev, enum nl80211_iftype type, 2215 struct vif_params *params) 2216 { 2217 struct net_device *ndev = NULL; 2218 struct ieee80211_sub_if_data *sdata = NULL; 2219 struct txq_info *txqi; 2220 int ret, i; 2221 2222 ASSERT_RTNL(); 2223 lockdep_assert_wiphy(local->hw.wiphy); 2224 2225 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 2226 struct wireless_dev *wdev; 2227 2228 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, 2229 GFP_KERNEL); 2230 if (!sdata) 2231 return -ENOMEM; 2232 wdev = &sdata->wdev; 2233 2234 sdata->dev = NULL; 2235 strscpy(sdata->name, name, IFNAMSIZ); 2236 ieee80211_assign_perm_addr(local, wdev->address, type); 2237 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 2238 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2239 } else { 2240 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2241 sizeof(void *)); 2242 int txq_size = 0; 2243 2244 if (type != NL80211_IFTYPE_AP_VLAN && 2245 (type != NL80211_IFTYPE_MONITOR || 2246 (params->flags & MONITOR_FLAG_ACTIVE))) 2247 txq_size += sizeof(struct txq_info) + 2248 local->hw.txq_data_size; 2249 2250 ndev = alloc_netdev_mqs(size + txq_size, 2251 name, name_assign_type, 2252 ieee80211_if_setup, 1, 1); 2253 if (!ndev) 2254 return -ENOMEM; 2255 2256 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 2257 2258 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2259 2260 ndev->needed_headroom = local->tx_headroom + 2261 4*6 /* four MAC addresses */ 2262 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 2263 + 6 /* mesh */ 2264 + 8 /* rfc1042/bridge tunnel */ 2265 - ETH_HLEN /* ethernet hard_header_len */ 2266 + IEEE80211_ENCRYPT_HEADROOM; 2267 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 2268 2269 ret = dev_alloc_name(ndev, ndev->name); 2270 if (ret < 0) { 2271 free_netdev(ndev); 2272 return ret; 2273 } 2274 2275 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 2276 if (is_valid_ether_addr(params->macaddr)) 2277 eth_hw_addr_set(ndev, params->macaddr); 2278 else 2279 eth_hw_addr_set(ndev, ndev->perm_addr); 2280 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 2281 2282 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 2283 sdata = netdev_priv(ndev); 2284 ndev->ieee80211_ptr = &sdata->wdev; 2285 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 2286 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2287 memcpy(sdata->name, ndev->name, IFNAMSIZ); 2288 2289 if (txq_size) { 2290 txqi = netdev_priv(ndev) + size; 2291 ieee80211_txq_init(sdata, NULL, txqi, 0); 2292 } 2293 2294 sdata->dev = ndev; 2295 } 2296 2297 /* initialise type-independent data */ 2298 sdata->wdev.wiphy = local->hw.wiphy; 2299 2300 ieee80211_sdata_init(local, sdata); 2301 2302 ieee80211_init_frag_cache(&sdata->frags); 2303 2304 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk, 2305 ieee80211_delayed_tailroom_dec); 2306 2307 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2308 struct ieee80211_supported_band *sband; 2309 sband = local->hw.wiphy->bands[i]; 2310 sdata->rc_rateidx_mask[i] = 2311 sband ? (1 << sband->n_bitrates) - 1 : 0; 2312 if (sband) { 2313 __le16 cap; 2314 u16 *vht_rate_mask; 2315 2316 memcpy(sdata->rc_rateidx_mcs_mask[i], 2317 sband->ht_cap.mcs.rx_mask, 2318 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2319 2320 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 2321 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 2322 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 2323 } else { 2324 memset(sdata->rc_rateidx_mcs_mask[i], 0, 2325 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2326 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 2327 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 2328 } 2329 } 2330 2331 ieee80211_set_default_queues(sdata); 2332 2333 /* setup type-dependent data */ 2334 ieee80211_setup_sdata(sdata, type); 2335 2336 if (ndev) { 2337 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 2338 if (type == NL80211_IFTYPE_STATION) 2339 sdata->u.mgd.use_4addr = params->use_4addr; 2340 2341 ndev->features |= local->hw.netdev_features; 2342 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 2343 ndev->hw_features |= ndev->features & 2344 MAC80211_SUPPORTED_FEATURES_TX; 2345 sdata->vif.netdev_features = local->hw.netdev_features; 2346 2347 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2348 2349 /* MTU range is normally 256 - 2304, where the upper limit is 2350 * the maximum MSDU size. Monitor interfaces send and receive 2351 * MPDU and A-MSDU frames which may be much larger so we do 2352 * not impose an upper limit in that case. 2353 */ 2354 ndev->min_mtu = 256; 2355 if (type == NL80211_IFTYPE_MONITOR) 2356 ndev->max_mtu = 0; 2357 else 2358 ndev->max_mtu = local->hw.max_mtu; 2359 2360 ret = cfg80211_register_netdevice(ndev); 2361 if (ret) { 2362 free_netdev(ndev); 2363 return ret; 2364 } 2365 } 2366 2367 mutex_lock(&local->iflist_mtx); 2368 list_add_tail_rcu(&sdata->list, &local->interfaces); 2369 mutex_unlock(&local->iflist_mtx); 2370 2371 if (new_wdev) 2372 *new_wdev = &sdata->wdev; 2373 2374 return 0; 2375 } 2376 2377 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2378 { 2379 ASSERT_RTNL(); 2380 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2381 2382 mutex_lock(&sdata->local->iflist_mtx); 2383 list_del_rcu(&sdata->list); 2384 mutex_unlock(&sdata->local->iflist_mtx); 2385 2386 if (sdata->vif.txq) 2387 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2388 2389 synchronize_rcu(); 2390 2391 cfg80211_unregister_wdev(&sdata->wdev); 2392 2393 if (!sdata->dev) { 2394 ieee80211_teardown_sdata(sdata); 2395 kfree(sdata); 2396 } 2397 } 2398 2399 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2400 { 2401 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2402 return; 2403 ieee80211_do_stop(sdata, true); 2404 } 2405 2406 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2407 { 2408 struct ieee80211_sub_if_data *sdata, *tmp; 2409 LIST_HEAD(unreg_list); 2410 2411 ASSERT_RTNL(); 2412 2413 /* Before destroying the interfaces, make sure they're all stopped so 2414 * that the hardware is stopped. Otherwise, the driver might still be 2415 * iterating the interfaces during the shutdown, e.g. from a worker 2416 * or from RX processing or similar, and if it does so (using atomic 2417 * iteration) while we're manipulating the list, the iteration will 2418 * crash. 2419 * 2420 * After this, the hardware should be stopped and the driver should 2421 * have stopped all of its activities, so that we can do RCU-unaware 2422 * manipulations of the interface list below. 2423 */ 2424 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2425 2426 guard(wiphy)(local->hw.wiphy); 2427 2428 WARN(local->open_count, "%s: open count remains %d\n", 2429 wiphy_name(local->hw.wiphy), local->open_count); 2430 2431 mutex_lock(&local->iflist_mtx); 2432 list_splice_init(&local->interfaces, &unreg_list); 2433 mutex_unlock(&local->iflist_mtx); 2434 2435 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) { 2436 bool netdev = sdata->dev; 2437 2438 /* 2439 * Remove IP addresses explicitly, since the notifier will 2440 * skip the callbacks if wdev->registered is false, since 2441 * we can't acquire the wiphy_lock() again there if already 2442 * inside this locked section. 2443 */ 2444 sdata->vif.cfg.arp_addr_cnt = 0; 2445 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2446 sdata->u.mgd.associated) 2447 ieee80211_vif_cfg_change_notify(sdata, 2448 BSS_CHANGED_ARP_FILTER); 2449 2450 list_del(&sdata->list); 2451 cfg80211_unregister_wdev(&sdata->wdev); 2452 2453 if (!netdev) 2454 kfree(sdata); 2455 } 2456 } 2457 2458 static int netdev_notify(struct notifier_block *nb, 2459 unsigned long state, void *ptr) 2460 { 2461 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2462 struct ieee80211_sub_if_data *sdata; 2463 2464 if (state != NETDEV_CHANGENAME) 2465 return NOTIFY_DONE; 2466 2467 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2468 return NOTIFY_DONE; 2469 2470 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2471 return NOTIFY_DONE; 2472 2473 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2474 memcpy(sdata->name, dev->name, IFNAMSIZ); 2475 ieee80211_debugfs_rename_netdev(sdata); 2476 2477 return NOTIFY_OK; 2478 } 2479 2480 static struct notifier_block mac80211_netdev_notifier = { 2481 .notifier_call = netdev_notify, 2482 }; 2483 2484 int ieee80211_iface_init(void) 2485 { 2486 return register_netdevice_notifier(&mac80211_netdev_notifier); 2487 } 2488 2489 void ieee80211_iface_exit(void) 2490 { 2491 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2492 } 2493 2494 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2495 { 2496 if (sdata->vif.type == NL80211_IFTYPE_AP) 2497 atomic_inc(&sdata->u.ap.num_mcast_sta); 2498 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2499 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2500 } 2501 2502 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2503 { 2504 if (sdata->vif.type == NL80211_IFTYPE_AP) 2505 atomic_dec(&sdata->u.ap.num_mcast_sta); 2506 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2507 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2508 } 2509 2510 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata) 2511 { 2512 struct ieee80211_local *local = sdata->local; 2513 2514 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) 2515 return; 2516 2517 ieee80211_stop_vif_queues_norefcount(local, sdata, 2518 IEEE80211_QUEUE_STOP_REASON_CSA); 2519 } 2520 2521 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata) 2522 { 2523 struct ieee80211_local *local = sdata->local; 2524 2525 ieee80211_wake_vif_queues_norefcount(local, sdata, 2526 IEEE80211_QUEUE_STOP_REASON_CSA); 2527 } 2528