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 * A NAN DATA interface is correlated to the NAN 366 * (management) one 367 */ 368 if (iftype == NL80211_IFTYPE_NAN_DATA && 369 nsdata->vif.type == NL80211_IFTYPE_NAN) { 370 if (!nsdata->u.nan.started) 371 return -EINVAL; 372 rcu_assign_pointer(sdata->u.nan_data.nmi, nsdata); 373 } 374 375 /* 376 * Allow only a single IBSS interface to be up at any 377 * time. This is restricted because beacon distribution 378 * cannot work properly if both are in the same IBSS. 379 * 380 * To remove this restriction we'd have to disallow them 381 * from setting the same SSID on different IBSS interfaces 382 * belonging to the same hardware. Then, however, we're 383 * faced with having to adopt two different TSF timers... 384 */ 385 if (iftype == NL80211_IFTYPE_ADHOC && 386 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 387 return -EBUSY; 388 /* 389 * will not add another interface while any channel 390 * switch is active. 391 */ 392 for_each_link_data(nsdata, link) { 393 if (link->conf->csa_active) 394 return -EBUSY; 395 } 396 397 /* 398 * The remaining checks are only performed for interfaces 399 * with the same MAC address. 400 */ 401 if (!ether_addr_equal(sdata->vif.addr, 402 nsdata->vif.addr)) 403 continue; 404 405 /* 406 * check whether it may have the same address 407 */ 408 if (!identical_mac_addr_allowed(iftype, 409 nsdata->vif.type)) 410 return -ENOTUNIQ; 411 412 /* 413 * can only add VLANs to enabled APs 414 */ 415 if (iftype == NL80211_IFTYPE_AP_VLAN && 416 nsdata->vif.type == NL80211_IFTYPE_AP) 417 sdata->bss = &nsdata->u.ap; 418 } 419 } 420 421 return ieee80211_check_combinations(sdata, NULL, 0, 0, -1); 422 } 423 424 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 425 enum nl80211_iftype iftype) 426 { 427 int n_queues = sdata->local->hw.queues; 428 int i; 429 430 if (iftype == NL80211_IFTYPE_NAN) 431 return 0; 432 433 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 434 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 435 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 436 IEEE80211_INVAL_HW_QUEUE)) 437 return -EINVAL; 438 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 439 n_queues)) 440 return -EINVAL; 441 } 442 } 443 444 if ((iftype != NL80211_IFTYPE_AP && 445 iftype != NL80211_IFTYPE_P2P_GO && 446 iftype != NL80211_IFTYPE_MESH_POINT) || 447 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 448 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 449 return 0; 450 } 451 452 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 453 return -EINVAL; 454 455 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 456 return -EINVAL; 457 458 return 0; 459 } 460 461 static int ieee80211_open(struct net_device *dev) 462 { 463 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 464 int err; 465 466 /* fail early if user set an invalid address */ 467 if (!is_valid_ether_addr(dev->dev_addr)) 468 return -EADDRNOTAVAIL; 469 470 guard(wiphy)(sdata->local->hw.wiphy); 471 472 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 473 if (err) 474 return err; 475 476 return ieee80211_do_open(&sdata->wdev, true); 477 } 478 479 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) 480 { 481 struct ieee80211_local *local = sdata->local; 482 struct ieee80211_sub_if_data *iter; 483 unsigned long flags; 484 struct sk_buff_head freeq; 485 struct sk_buff *skb, *tmp; 486 u32 hw_reconf_flags = 0; 487 int i, flushed; 488 struct ps_data *ps; 489 struct cfg80211_chan_def chandef; 490 bool cancel_scan; 491 struct cfg80211_nan_func *func; 492 493 lockdep_assert_wiphy(local->hw.wiphy); 494 495 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 496 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */ 497 498 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 499 if (cancel_scan) 500 ieee80211_scan_cancel(local); 501 502 ieee80211_roc_purge(local, sdata); 503 504 switch (sdata->vif.type) { 505 case NL80211_IFTYPE_STATION: 506 ieee80211_mgd_stop(sdata); 507 break; 508 case NL80211_IFTYPE_ADHOC: 509 ieee80211_ibss_stop(sdata); 510 break; 511 case NL80211_IFTYPE_MONITOR: 512 list_del_rcu(&sdata->u.mntr.list); 513 break; 514 case NL80211_IFTYPE_AP_VLAN: 515 ieee80211_apvlan_link_clear(sdata); 516 break; 517 default: 518 break; 519 } 520 521 /* 522 * Remove all stations associated with this interface. 523 * 524 * This must be done before calling ops->remove_interface() 525 * because otherwise we can later invoke ops->sta_notify() 526 * whenever the STAs are removed, and that invalidates driver 527 * assumptions about always getting a vif pointer that is valid 528 * (because if we remove a STA after ops->remove_interface() 529 * the driver will have removed the vif info already!) 530 * 531 * For AP_VLANs, NAN and NAN_DATA stations may exist since there's 532 * nothing else that would have removed them, but in other modes there 533 * shouldn't be any stations. 534 */ 535 flushed = sta_info_flush(sdata, -1); 536 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 537 sdata->vif.type != NL80211_IFTYPE_NAN && 538 sdata->vif.type != NL80211_IFTYPE_NAN_DATA && flushed > 0); 539 540 /* don't count this interface for allmulti while it is down */ 541 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 542 atomic_dec(&local->iff_allmultis); 543 544 if (sdata->vif.type == NL80211_IFTYPE_AP) { 545 local->fif_pspoll--; 546 local->fif_probe_req--; 547 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 548 local->fif_probe_req--; 549 } 550 551 if (sdata->dev) { 552 netif_addr_lock_bh(sdata->dev); 553 spin_lock_bh(&local->filter_lock); 554 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 555 sdata->dev->addr_len); 556 spin_unlock_bh(&local->filter_lock); 557 netif_addr_unlock_bh(sdata->dev); 558 } 559 560 timer_delete_sync(&local->dynamic_ps_timer); 561 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 562 563 WARN(ieee80211_vif_is_mld(&sdata->vif), 564 "destroying interface with valid links 0x%04x\n", 565 sdata->vif.valid_links); 566 567 sdata->vif.bss_conf.csa_active = false; 568 if (sdata->vif.type == NL80211_IFTYPE_STATION) 569 sdata->deflink.u.mgd.csa.waiting_bcn = false; 570 ieee80211_vif_unblock_queues_csa(sdata); 571 572 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work); 573 wiphy_work_cancel(local->hw.wiphy, 574 &sdata->deflink.color_change_finalize_work); 575 wiphy_hrtimer_work_cancel(local->hw.wiphy, 576 &sdata->deflink.dfs_cac_timer_work); 577 578 if (sdata->wdev.links[0].cac_started) { 579 chandef = sdata->vif.bss_conf.chanreq.oper; 580 WARN_ON(local->suspended); 581 ieee80211_link_release_channel(&sdata->deflink); 582 cfg80211_cac_event(sdata->dev, &chandef, 583 NL80211_RADAR_CAC_ABORTED, 584 GFP_KERNEL, 0); 585 } 586 587 if (sdata->vif.type == NL80211_IFTYPE_AP) { 588 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 589 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 590 /* remove all packets in parent bc_buf pointing to this dev */ 591 __skb_queue_head_init(&freeq); 592 ps = &sdata->bss->ps; 593 594 spin_lock_irqsave(&ps->bc_buf.lock, flags); 595 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 596 if (skb->dev == sdata->dev) { 597 __skb_unlink(skb, &ps->bc_buf); 598 local->total_ps_buffered--; 599 __skb_queue_tail(&freeq, skb); 600 } 601 } 602 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 603 604 skb_queue_walk_safe(&freeq, skb, tmp) { 605 __skb_unlink(skb, &freeq); 606 ieee80211_free_txskb(&local->hw, skb); 607 } 608 } 609 610 if (going_down) 611 local->open_count--; 612 613 switch (sdata->vif.type) { 614 case NL80211_IFTYPE_AP_VLAN: 615 list_del(&sdata->u.vlan.list); 616 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL); 617 /* see comment in the default case below */ 618 ieee80211_free_keys(sdata, true); 619 /* no need to tell driver */ 620 break; 621 case NL80211_IFTYPE_MONITOR: 622 local->monitors--; 623 624 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 625 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 626 627 local->virt_monitors--; 628 if (local->virt_monitors == 0) { 629 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 630 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 631 } 632 633 ieee80211_adjust_monitor_flags(sdata, -1); 634 } 635 break; 636 case NL80211_IFTYPE_NAN: 637 /* Check if any open NAN_DATA interfaces */ 638 list_for_each_entry(iter, &local->interfaces, list) { 639 WARN_ON(iter->vif.type == NL80211_IFTYPE_NAN_DATA && 640 ieee80211_sdata_running(iter)); 641 } 642 643 /* clean all the functions */ 644 if (!(local->hw.wiphy->nan_capa.flags & 645 WIPHY_NAN_FLAGS_USERSPACE_DE)) { 646 spin_lock_bh(&sdata->u.nan.de.func_lock); 647 648 idr_for_each_entry(&sdata->u.nan.de.function_inst_ids, 649 func, i) { 650 idr_remove(&sdata->u.nan.de.function_inst_ids, i); 651 cfg80211_free_nan_func(func); 652 } 653 idr_destroy(&sdata->u.nan.de.function_inst_ids); 654 655 spin_unlock_bh(&sdata->u.nan.de.func_lock); 656 } 657 658 /* 659 * Free the remaining keys that might be associated with the 660 * NAN interface, e.g., IGTK and BIGTK used for Tx. 661 */ 662 ieee80211_free_keys(sdata, true); 663 break; 664 case NL80211_IFTYPE_NAN_DATA: 665 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL); 666 fallthrough; 667 default: 668 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 669 /* 670 * When we get here, the interface is marked down. 671 * Free the remaining keys, if there are any 672 * (which can happen in AP mode if userspace sets 673 * keys before the interface is operating) 674 * 675 * Force the key freeing to always synchronize_net() 676 * to wait for the RX path in case it is using this 677 * interface enqueuing frames at this very time on 678 * another CPU. 679 */ 680 ieee80211_free_keys(sdata, true); 681 skb_queue_purge(&sdata->skb_queue); 682 skb_queue_purge(&sdata->status_queue); 683 } 684 685 /* 686 * Since ieee80211_free_txskb() may issue __dev_queue_xmit() 687 * which should be called with interrupts enabled, reclamation 688 * is done in two phases: 689 */ 690 __skb_queue_head_init(&freeq); 691 692 /* unlink from local queues... */ 693 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 694 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 695 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 696 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 697 if (info->control.vif == &sdata->vif) { 698 __skb_unlink(skb, &local->pending[i]); 699 __skb_queue_tail(&freeq, skb); 700 } 701 } 702 } 703 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 704 705 /* ... and perform actual reclamation with interrupts enabled. */ 706 skb_queue_walk_safe(&freeq, skb, tmp) { 707 __skb_unlink(skb, &freeq); 708 ieee80211_free_txskb(&local->hw, skb); 709 } 710 711 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 712 ieee80211_txq_remove_vlan(local, sdata); 713 714 if (sdata->vif.txq) 715 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 716 717 if (sdata->vif.txq_mgmt) 718 ieee80211_txq_purge(sdata->local, 719 to_txq_info(sdata->vif.txq_mgmt)); 720 721 sdata->bss = NULL; 722 723 if (local->open_count == 0) 724 ieee80211_clear_tx_pending(local); 725 726 sdata->vif.bss_conf.beacon_int = 0; 727 728 /* 729 * If the interface goes down while suspended, presumably because 730 * the device was unplugged and that happens before our resume, 731 * then the driver is already unconfigured and the remainder of 732 * this function isn't needed. 733 * XXX: what about WoWLAN? If the device has software state, e.g. 734 * memory allocated, it might expect teardown commands from 735 * mac80211 here? 736 */ 737 if (local->suspended) { 738 WARN_ON(local->wowlan); 739 WARN_ON(rcu_access_pointer(local->monitor_sdata)); 740 return; 741 } 742 743 switch (sdata->vif.type) { 744 case NL80211_IFTYPE_AP_VLAN: 745 break; 746 case NL80211_IFTYPE_MONITOR: 747 if (local->virt_monitors == 0) 748 ieee80211_del_virtual_monitor(local); 749 750 ieee80211_recalc_idle(local); 751 ieee80211_recalc_offload(local); 752 753 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 754 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 755 break; 756 757 ieee80211_link_release_channel(&sdata->deflink); 758 fallthrough; 759 default: 760 if (!going_down) 761 break; 762 drv_remove_interface(local, sdata); 763 764 /* Clear private driver data to prevent reuse */ 765 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size); 766 } 767 768 ieee80211_recalc_ps(local); 769 770 if (cancel_scan) 771 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work); 772 773 if (local->open_count == 0) { 774 ieee80211_stop_device(local, false); 775 776 /* no reconfiguring after stop! */ 777 return; 778 } 779 780 /* do after stop to avoid reconfiguring when we stop anyway */ 781 ieee80211_configure_filter(local); 782 ieee80211_hw_config(local, -1, hw_reconf_flags); 783 784 /* Passing NULL means an interface is picked for configuration */ 785 if (local->virt_monitors == local->open_count) 786 ieee80211_add_virtual_monitor(local, NULL); 787 } 788 789 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata) 790 { 791 struct ieee80211_sub_if_data *tx_sdata; 792 struct ieee80211_bss_conf *link_conf, *tx_bss_conf; 793 struct ieee80211_link_data *tx_link, *link; 794 unsigned int link_id; 795 796 lockdep_assert_wiphy(sdata->local->hw.wiphy); 797 798 /* Check if any of the links of current sdata is an MBSSID. */ 799 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 800 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata); 801 if (!tx_bss_conf) 802 continue; 803 804 tx_sdata = vif_to_sdata(tx_bss_conf->vif); 805 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL); 806 807 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion 808 * while closing tx sdata at the end of outer loop below. 809 */ 810 if (sdata != tx_sdata) { 811 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id], 812 tx_sdata); 813 if (!tx_link) 814 continue; 815 816 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL); 817 } 818 819 /* loop through sdatas to find if any of their links 820 * belong to same MBSSID set as the one getting deleted. 821 */ 822 for_each_sdata_link(tx_sdata->local, link) { 823 struct ieee80211_sub_if_data *link_sdata = link->sdata; 824 825 if (link_sdata == sdata || link_sdata == tx_sdata || 826 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf) 827 continue; 828 829 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL); 830 831 /* Remove all links of matching MLD until dynamic link 832 * removal can be supported. 833 */ 834 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev, 835 GFP_KERNEL); 836 } 837 838 /* If we are not tx sdata, remove links of tx sdata and proceed */ 839 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) 840 cfg80211_stop_iface(tx_sdata->wdev.wiphy, 841 &tx_sdata->wdev, GFP_KERNEL); 842 } 843 } 844 845 static int ieee80211_stop(struct net_device *dev) 846 { 847 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 848 849 /* close dependent VLAN interfaces before locking wiphy */ 850 if (sdata->vif.type == NL80211_IFTYPE_AP) { 851 struct ieee80211_sub_if_data *vlan, *tmpsdata; 852 853 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 854 u.vlan.list) 855 dev_close(vlan->dev); 856 } 857 858 guard(wiphy)(sdata->local->hw.wiphy); 859 860 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work); 861 862 /* Close the dependent MBSSID interfaces with wiphy lock as we may be 863 * terminating its partner links too in case of MLD. 864 */ 865 if (sdata->vif.type == NL80211_IFTYPE_AP) 866 ieee80211_stop_mbssid(sdata); 867 868 ieee80211_do_stop(sdata, true); 869 870 return 0; 871 } 872 873 static void ieee80211_set_multicast_list(struct net_device *dev) 874 { 875 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 876 struct ieee80211_local *local = sdata->local; 877 int allmulti, sdata_allmulti; 878 879 allmulti = !!(dev->flags & IFF_ALLMULTI); 880 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 881 882 if (allmulti != sdata_allmulti) { 883 if (dev->flags & IFF_ALLMULTI) 884 atomic_inc(&local->iff_allmultis); 885 else 886 atomic_dec(&local->iff_allmultis); 887 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 888 } 889 890 spin_lock_bh(&local->filter_lock); 891 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 892 spin_unlock_bh(&local->filter_lock); 893 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter); 894 } 895 896 /* 897 * Called when the netdev is removed or, by the code below, before 898 * the interface type changes. 899 */ 900 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 901 { 902 if (WARN_ON(!list_empty(&sdata->work.entry))) 903 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 904 905 /* free extra data */ 906 ieee80211_free_keys(sdata, false); 907 908 ieee80211_debugfs_remove_netdev(sdata); 909 910 ieee80211_destroy_frag_cache(&sdata->frags); 911 912 if (ieee80211_vif_is_mesh(&sdata->vif)) 913 ieee80211_mesh_teardown_sdata(sdata); 914 915 ieee80211_vif_clear_links(sdata); 916 ieee80211_link_stop(&sdata->deflink); 917 918 if (sdata->vif.type == NL80211_IFTYPE_NAN) { 919 struct ieee80211_nan_sched_cfg *nan_sched = 920 &sdata->vif.cfg.nan_sched; 921 922 for (int i = 0; i < ARRAY_SIZE(nan_sched->channels); i++) 923 WARN_ON(nan_sched->channels[i].chanreq.oper.chan); 924 } 925 } 926 927 static void ieee80211_uninit(struct net_device *dev) 928 { 929 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 930 } 931 932 static int ieee80211_netdev_setup_tc(struct net_device *dev, 933 enum tc_setup_type type, void *type_data) 934 { 935 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 936 struct ieee80211_local *local = sdata->local; 937 938 return drv_net_setup_tc(local, sdata, dev, type, type_data); 939 } 940 941 static const struct net_device_ops ieee80211_dataif_ops = { 942 .ndo_open = ieee80211_open, 943 .ndo_stop = ieee80211_stop, 944 .ndo_uninit = ieee80211_uninit, 945 .ndo_start_xmit = ieee80211_subif_start_xmit, 946 .ndo_set_rx_mode = ieee80211_set_multicast_list, 947 .ndo_set_mac_address = ieee80211_change_mac, 948 .ndo_setup_tc = ieee80211_netdev_setup_tc, 949 }; 950 951 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 952 struct sk_buff *skb, 953 struct net_device *sb_dev) 954 { 955 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 956 struct ieee80211_local *local = sdata->local; 957 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 958 struct ieee80211_hdr *hdr; 959 int len_rthdr; 960 961 if (local->hw.queues < IEEE80211_NUM_ACS) 962 return 0; 963 964 /* reset flags and info before parsing radiotap header */ 965 memset(info, 0, sizeof(*info)); 966 967 if (!ieee80211_parse_tx_radiotap(skb, dev)) 968 return 0; /* doesn't matter, frame will be dropped */ 969 970 len_rthdr = ieee80211_get_radiotap_len(skb->data); 971 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 972 if (skb->len < len_rthdr + 2 || 973 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 974 return 0; /* doesn't matter, frame will be dropped */ 975 976 return ieee80211_select_queue_80211(sdata, skb, hdr); 977 } 978 979 static const struct net_device_ops ieee80211_monitorif_ops = { 980 .ndo_open = ieee80211_open, 981 .ndo_stop = ieee80211_stop, 982 .ndo_uninit = ieee80211_uninit, 983 .ndo_start_xmit = ieee80211_monitor_start_xmit, 984 .ndo_set_rx_mode = ieee80211_set_multicast_list, 985 .ndo_set_mac_address = ieee80211_change_mac, 986 .ndo_select_queue = ieee80211_monitor_select_queue, 987 }; 988 989 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx, 990 struct net_device_path *path) 991 { 992 struct ieee80211_sub_if_data *sdata; 993 struct ieee80211_local *local; 994 struct sta_info *sta; 995 int ret = -ENOENT; 996 997 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev); 998 local = sdata->local; 999 1000 if (!local->ops->net_fill_forward_path) 1001 return -EOPNOTSUPP; 1002 1003 rcu_read_lock(); 1004 switch (sdata->vif.type) { 1005 case NL80211_IFTYPE_AP_VLAN: 1006 sta = rcu_dereference(sdata->u.vlan.sta); 1007 if (sta) 1008 break; 1009 if (sdata->wdev.use_4addr) 1010 goto out; 1011 if (is_multicast_ether_addr(ctx->daddr)) 1012 goto out; 1013 sta = sta_info_get_bss(sdata, ctx->daddr); 1014 break; 1015 case NL80211_IFTYPE_AP: 1016 if (is_multicast_ether_addr(ctx->daddr)) 1017 goto out; 1018 sta = sta_info_get(sdata, ctx->daddr); 1019 break; 1020 case NL80211_IFTYPE_STATION: 1021 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { 1022 sta = sta_info_get(sdata, ctx->daddr); 1023 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { 1024 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1025 goto out; 1026 1027 break; 1028 } 1029 } 1030 1031 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 1032 break; 1033 default: 1034 goto out; 1035 } 1036 1037 if (!sta) 1038 goto out; 1039 1040 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path); 1041 out: 1042 rcu_read_unlock(); 1043 1044 return ret; 1045 } 1046 1047 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1048 .ndo_open = ieee80211_open, 1049 .ndo_stop = ieee80211_stop, 1050 .ndo_uninit = ieee80211_uninit, 1051 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1052 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1053 .ndo_set_mac_address = ieee80211_change_mac, 1054 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path, 1055 .ndo_setup_tc = ieee80211_netdev_setup_tc, 1056 }; 1057 1058 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 1059 { 1060 switch (iftype) { 1061 /* P2P GO and client are mapped to AP/STATION types */ 1062 case NL80211_IFTYPE_AP: 1063 case NL80211_IFTYPE_STATION: 1064 return true; 1065 default: 1066 return false; 1067 } 1068 } 1069 1070 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 1071 { 1072 struct ieee80211_local *local = sdata->local; 1073 u32 flags; 1074 1075 flags = sdata->vif.offload_flags; 1076 1077 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 1078 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1079 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 1080 1081 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1082 local->hw.wiphy->frag_threshold != (u32)-1) 1083 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1084 1085 if (local->virt_monitors) 1086 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1087 } else { 1088 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1089 } 1090 1091 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 1092 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1093 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 1094 1095 if (local->virt_monitors && 1096 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 1097 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1098 } else { 1099 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1100 } 1101 1102 if (sdata->vif.offload_flags == flags) 1103 return false; 1104 1105 sdata->vif.offload_flags = flags; 1106 ieee80211_check_fast_rx_iface(sdata); 1107 return true; 1108 } 1109 1110 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 1111 { 1112 struct ieee80211_local *local = sdata->local; 1113 struct ieee80211_sub_if_data *bss = sdata; 1114 bool enabled; 1115 1116 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1117 if (!sdata->bss) 1118 return; 1119 1120 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 1121 } 1122 1123 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 1124 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 1125 return; 1126 1127 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 1128 if (sdata->wdev.use_4addr && 1129 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 1130 enabled = false; 1131 1132 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 1133 &ieee80211_dataif_ops; 1134 } 1135 1136 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 1137 { 1138 struct ieee80211_local *local = sdata->local; 1139 struct ieee80211_sub_if_data *vsdata; 1140 1141 if (ieee80211_set_sdata_offload_flags(sdata)) { 1142 drv_update_vif_offload(local, sdata); 1143 ieee80211_set_vif_encap_ops(sdata); 1144 } 1145 1146 list_for_each_entry(vsdata, &local->interfaces, list) { 1147 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 1148 vsdata->bss != &sdata->u.ap) 1149 continue; 1150 1151 ieee80211_set_vif_encap_ops(vsdata); 1152 } 1153 } 1154 1155 void ieee80211_recalc_offload(struct ieee80211_local *local) 1156 { 1157 struct ieee80211_sub_if_data *sdata; 1158 1159 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 1160 return; 1161 1162 lockdep_assert_wiphy(local->hw.wiphy); 1163 1164 list_for_each_entry(sdata, &local->interfaces, list) { 1165 if (!ieee80211_sdata_running(sdata)) 1166 continue; 1167 1168 ieee80211_recalc_sdata_offload(sdata); 1169 } 1170 } 1171 1172 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 1173 const int offset) 1174 { 1175 struct ieee80211_local *local = sdata->local; 1176 u32 flags = sdata->u.mntr.flags; 1177 1178 #define ADJUST(_f, _s) do { \ 1179 if (flags & MONITOR_FLAG_##_f) \ 1180 local->fif_##_s += offset; \ 1181 } while (0) 1182 1183 ADJUST(FCSFAIL, fcsfail); 1184 ADJUST(PLCPFAIL, plcpfail); 1185 ADJUST(CONTROL, control); 1186 ADJUST(CONTROL, pspoll); 1187 ADJUST(OTHER_BSS, other_bss); 1188 if (!(flags & MONITOR_FLAG_SKIP_TX)) 1189 local->tx_mntrs += offset; 1190 1191 #undef ADJUST 1192 } 1193 1194 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 1195 { 1196 struct ieee80211_local *local = sdata->local; 1197 int i; 1198 1199 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 1200 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 1201 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 1202 else if (local->hw.queues >= IEEE80211_NUM_ACS) 1203 sdata->vif.hw_queue[i] = i; 1204 else 1205 sdata->vif.hw_queue[i] = 0; 1206 } 1207 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 1208 } 1209 1210 static void ieee80211_sdata_init(struct ieee80211_local *local, 1211 struct ieee80211_sub_if_data *sdata) 1212 { 1213 sdata->local = local; 1214 1215 INIT_LIST_HEAD(&sdata->key_list); 1216 1217 /* 1218 * Initialize the default link, so we can use link_id 0 for non-MLD, 1219 * and that continues to work for non-MLD-aware drivers that use just 1220 * vif.bss_conf instead of vif.link_conf. 1221 * 1222 * Note that we never change this, so if link ID 0 isn't used in an 1223 * MLD connection, we get a separate allocation for it. 1224 */ 1225 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf); 1226 } 1227 1228 int ieee80211_add_virtual_monitor(struct ieee80211_local *local, 1229 struct ieee80211_sub_if_data *creator_sdata) 1230 { 1231 struct ieee80211_sub_if_data *sdata; 1232 int ret; 1233 1234 ASSERT_RTNL(); 1235 lockdep_assert_wiphy(local->hw.wiphy); 1236 1237 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1238 return 0; 1239 1240 /* Already have a monitor set up, configure it */ 1241 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 1242 if (sdata) 1243 goto configure_monitor; 1244 1245 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 1246 if (!sdata) 1247 return -ENOMEM; 1248 1249 /* set up data */ 1250 sdata->vif.type = NL80211_IFTYPE_MONITOR; 1251 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 1252 wiphy_name(local->hw.wiphy)); 1253 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 1254 sdata->wdev.wiphy = local->hw.wiphy; 1255 1256 ieee80211_sdata_init(local, sdata); 1257 1258 ieee80211_set_default_queues(sdata); 1259 1260 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) { 1261 ret = drv_add_interface(local, sdata); 1262 if (WARN_ON(ret)) { 1263 /* ok .. stupid driver, it asked for this! */ 1264 kfree(sdata); 1265 return ret; 1266 } 1267 } 1268 1269 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 1270 if (ret) { 1271 kfree(sdata); 1272 return ret; 1273 } 1274 1275 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1276 1277 mutex_lock(&local->iflist_mtx); 1278 rcu_assign_pointer(local->monitor_sdata, sdata); 1279 mutex_unlock(&local->iflist_mtx); 1280 1281 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq, 1282 IEEE80211_CHANCTX_EXCLUSIVE); 1283 if (ret) { 1284 mutex_lock(&local->iflist_mtx); 1285 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1286 mutex_unlock(&local->iflist_mtx); 1287 synchronize_net(); 1288 drv_remove_interface(local, sdata); 1289 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1290 kfree(sdata); 1291 return ret; 1292 } 1293 1294 skb_queue_head_init(&sdata->skb_queue); 1295 skb_queue_head_init(&sdata->status_queue); 1296 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1297 1298 configure_monitor: 1299 /* Copy in the MU-MIMO configuration if set */ 1300 if (!creator_sdata) { 1301 struct ieee80211_sub_if_data *other; 1302 1303 list_for_each_entry_rcu(other, &local->mon_list, u.mntr.list) { 1304 if (!other->vif.bss_conf.mu_mimo_owner) 1305 continue; 1306 1307 creator_sdata = other; 1308 break; 1309 } 1310 } 1311 1312 if (creator_sdata && creator_sdata->vif.bss_conf.mu_mimo_owner) { 1313 sdata->vif.bss_conf.mu_mimo_owner = true; 1314 memcpy(&sdata->vif.bss_conf.mu_group, 1315 &creator_sdata->vif.bss_conf.mu_group, 1316 sizeof(sdata->vif.bss_conf.mu_group)); 1317 memcpy(&sdata->u.mntr.mu_follow_addr, 1318 creator_sdata->u.mntr.mu_follow_addr, ETH_ALEN); 1319 1320 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1321 BSS_CHANGED_MU_GROUPS); 1322 } 1323 1324 return 0; 1325 } 1326 1327 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 1328 { 1329 struct ieee80211_sub_if_data *sdata; 1330 1331 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1332 return; 1333 1334 ASSERT_RTNL(); 1335 lockdep_assert_wiphy(local->hw.wiphy); 1336 1337 mutex_lock(&local->iflist_mtx); 1338 1339 sdata = rcu_dereference_protected(local->monitor_sdata, 1340 lockdep_is_held(&local->iflist_mtx)); 1341 if (!sdata) { 1342 mutex_unlock(&local->iflist_mtx); 1343 return; 1344 } 1345 1346 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1347 ieee80211_link_release_channel(&sdata->deflink); 1348 1349 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1350 drv_remove_interface(local, sdata); 1351 1352 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1353 mutex_unlock(&local->iflist_mtx); 1354 1355 synchronize_net(); 1356 1357 kfree(sdata); 1358 } 1359 1360 /* 1361 * NOTE: Be very careful when changing this function, it must NOT return 1362 * an error on interface type changes that have been pre-checked, so most 1363 * checks should be in ieee80211_check_concurrent_iface. 1364 */ 1365 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1366 { 1367 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1368 struct net_device *dev = wdev->netdev; 1369 struct ieee80211_local *local = sdata->local; 1370 u64 changed = 0; 1371 int res; 1372 u32 hw_reconf_flags = 0; 1373 1374 lockdep_assert_wiphy(local->hw.wiphy); 1375 1376 switch (sdata->vif.type) { 1377 case NL80211_IFTYPE_AP_VLAN: { 1378 struct ieee80211_sub_if_data *master; 1379 1380 if (!sdata->bss) 1381 return -ENOLINK; 1382 1383 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1384 1385 master = container_of(sdata->bss, 1386 struct ieee80211_sub_if_data, u.ap); 1387 sdata->control_port_protocol = 1388 master->control_port_protocol; 1389 sdata->control_port_no_encrypt = 1390 master->control_port_no_encrypt; 1391 sdata->control_port_over_nl80211 = 1392 master->control_port_over_nl80211; 1393 sdata->control_port_no_preauth = 1394 master->control_port_no_preauth; 1395 sdata->vif.cab_queue = master->vif.cab_queue; 1396 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1397 sizeof(sdata->vif.hw_queue)); 1398 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq; 1399 1400 sdata->crypto_tx_tailroom_needed_cnt += 1401 master->crypto_tx_tailroom_needed_cnt; 1402 1403 ieee80211_apvlan_link_setup(sdata); 1404 1405 break; 1406 } 1407 case NL80211_IFTYPE_AP: 1408 case NL80211_IFTYPE_MESH_POINT: 1409 case NL80211_IFTYPE_STATION: 1410 case NL80211_IFTYPE_MONITOR: 1411 case NL80211_IFTYPE_ADHOC: 1412 case NL80211_IFTYPE_P2P_DEVICE: 1413 case NL80211_IFTYPE_OCB: 1414 case NL80211_IFTYPE_NAN: 1415 case NL80211_IFTYPE_PD: 1416 /* no special treatment */ 1417 break; 1418 case NL80211_IFTYPE_NAN_DATA: 1419 if (WARN_ON(!rcu_access_pointer(sdata->u.nan_data.nmi))) 1420 return -ENOLINK; 1421 break; 1422 case NL80211_IFTYPE_UNSPECIFIED: 1423 case NUM_NL80211_IFTYPES: 1424 case NL80211_IFTYPE_P2P_CLIENT: 1425 case NL80211_IFTYPE_P2P_GO: 1426 case NL80211_IFTYPE_WDS: 1427 /* cannot happen */ 1428 WARN_ON(1); 1429 break; 1430 } 1431 1432 if (local->open_count == 0) { 1433 /* here we can consider everything in good order (again) */ 1434 local->reconfig_failure = false; 1435 1436 res = drv_start(local); 1437 if (res) { 1438 /* 1439 * no need to worry about AP_VLAN/NAN_DATA cleanup since 1440 * in that case we can't have open_count == 0 1441 */ 1442 return res; 1443 } 1444 ieee80211_led_radio(local, true); 1445 ieee80211_mod_tpt_led_trig(local, 1446 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1447 } 1448 1449 /* 1450 * Copy the hopefully now-present MAC address to 1451 * this interface, if it has the special null one. 1452 */ 1453 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1454 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr); 1455 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1456 1457 if (!is_valid_ether_addr(dev->dev_addr)) { 1458 res = -EADDRNOTAVAIL; 1459 goto err_stop; 1460 } 1461 } 1462 1463 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR || 1464 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE); 1465 switch (sdata->vif.type) { 1466 case NL80211_IFTYPE_AP_VLAN: 1467 /* no need to tell driver, but set carrier and chanctx */ 1468 if (sdata->bss->active) { 1469 struct ieee80211_link_data *link; 1470 1471 for_each_link_data(sdata, link) { 1472 ieee80211_link_vlan_copy_chanctx(link); 1473 } 1474 1475 netif_carrier_on(dev); 1476 ieee80211_set_vif_encap_ops(sdata); 1477 } else { 1478 netif_carrier_off(dev); 1479 } 1480 break; 1481 case NL80211_IFTYPE_MONITOR: 1482 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) || 1483 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 1484 res = drv_add_interface(local, sdata); 1485 if (res) 1486 goto err_stop; 1487 } else { 1488 /* add/configure if there is no non-monitor interface */ 1489 if (local->virt_monitors == local->open_count) { 1490 res = ieee80211_add_virtual_monitor(local, sdata); 1491 if (res) 1492 goto err_stop; 1493 } 1494 1495 local->virt_monitors++; 1496 1497 /* must be before the call to ieee80211_configure_filter */ 1498 if (local->virt_monitors == 1) { 1499 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1500 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1501 } 1502 } 1503 1504 local->monitors++; 1505 1506 ieee80211_adjust_monitor_flags(sdata, 1); 1507 ieee80211_configure_filter(local); 1508 ieee80211_recalc_offload(local); 1509 ieee80211_recalc_idle(local); 1510 1511 netif_carrier_on(dev); 1512 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1513 break; 1514 case NL80211_IFTYPE_AP: 1515 sdata->bss = &sdata->u.ap; 1516 fallthrough; 1517 default: 1518 if (coming_up) { 1519 ieee80211_del_virtual_monitor(local); 1520 ieee80211_set_sdata_offload_flags(sdata); 1521 1522 res = drv_add_interface(local, sdata); 1523 if (res) 1524 goto err_stop; 1525 1526 ieee80211_set_vif_encap_ops(sdata); 1527 res = ieee80211_check_queues(sdata, 1528 ieee80211_vif_type_p2p(&sdata->vif)); 1529 if (res) 1530 goto err_del_interface; 1531 } 1532 1533 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1534 local->fif_pspoll++; 1535 local->fif_probe_req++; 1536 1537 ieee80211_configure_filter(local); 1538 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1539 local->fif_probe_req++; 1540 } 1541 1542 if (sdata->vif.probe_req_reg) 1543 drv_config_iface_filter(local, sdata, 1544 FIF_PROBE_REQ, 1545 FIF_PROBE_REQ); 1546 1547 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1548 sdata->vif.type != NL80211_IFTYPE_NAN && 1549 sdata->vif.type != NL80211_IFTYPE_PD) 1550 changed |= ieee80211_reset_erp_info(sdata); 1551 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1552 changed); 1553 1554 switch (sdata->vif.type) { 1555 case NL80211_IFTYPE_STATION: 1556 case NL80211_IFTYPE_ADHOC: 1557 case NL80211_IFTYPE_AP: 1558 case NL80211_IFTYPE_MESH_POINT: 1559 case NL80211_IFTYPE_OCB: 1560 case NL80211_IFTYPE_NAN_DATA: 1561 netif_carrier_off(dev); 1562 break; 1563 case NL80211_IFTYPE_P2P_DEVICE: 1564 case NL80211_IFTYPE_NAN: 1565 case NL80211_IFTYPE_PD: 1566 break; 1567 default: 1568 /* not reached */ 1569 WARN_ON(1); 1570 } 1571 1572 /* 1573 * Set default queue parameters so drivers don't 1574 * need to initialise the hardware if the hardware 1575 * doesn't start up with sane defaults. 1576 * Enable QoS for anything but station interfaces. 1577 */ 1578 ieee80211_set_wmm_default(&sdata->deflink, true, 1579 sdata->vif.type != NL80211_IFTYPE_STATION); 1580 } 1581 1582 /* 1583 * set_multicast_list will be invoked by the networking core 1584 * which will check whether any increments here were done in 1585 * error and sync them down to the hardware as filter flags. 1586 */ 1587 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1588 atomic_inc(&local->iff_allmultis); 1589 1590 if (coming_up) 1591 local->open_count++; 1592 1593 if (local->open_count == 1) 1594 ieee80211_hw_conf_init(local); 1595 else if (hw_reconf_flags) 1596 ieee80211_hw_config(local, -1, hw_reconf_flags); 1597 1598 ieee80211_recalc_ps(local); 1599 1600 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1601 1602 return 0; 1603 err_del_interface: 1604 drv_remove_interface(local, sdata); 1605 err_stop: 1606 if (!local->open_count) 1607 drv_stop(local, false); 1608 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 1609 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL); 1610 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1611 list_del(&sdata->u.vlan.list); 1612 /* Might not be initialized yet, but it is harmless */ 1613 sdata->bss = NULL; 1614 return res; 1615 } 1616 1617 static void ieee80211_if_setup(struct net_device *dev) 1618 { 1619 ether_setup(dev); 1620 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1621 dev->priv_flags |= IFF_NO_QUEUE; 1622 dev->netdev_ops = &ieee80211_dataif_ops; 1623 dev->needs_free_netdev = true; 1624 } 1625 1626 static void ieee80211_iface_process_skb(struct ieee80211_local *local, 1627 struct ieee80211_sub_if_data *sdata, 1628 struct sk_buff *skb) 1629 { 1630 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1631 1632 lockdep_assert_wiphy(local->hw.wiphy); 1633 1634 if (ieee80211_is_action(mgmt->frame_control) && 1635 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1636 struct sta_info *sta; 1637 int len = skb->len; 1638 1639 sta = sta_info_get_bss(sdata, mgmt->sa); 1640 if (sta) { 1641 switch (mgmt->u.action.action_code) { 1642 case WLAN_ACTION_ADDBA_REQ: 1643 case WLAN_ACTION_NDP_ADDBA_REQ: 1644 ieee80211_process_addba_request(local, sta, 1645 mgmt, len); 1646 break; 1647 case WLAN_ACTION_ADDBA_RESP: 1648 case WLAN_ACTION_NDP_ADDBA_RESP: 1649 ieee80211_process_addba_resp(local, sta, 1650 mgmt, len); 1651 break; 1652 case WLAN_ACTION_DELBA: 1653 case WLAN_ACTION_NDP_DELBA: 1654 ieee80211_process_delba(sdata, sta, 1655 mgmt, len); 1656 break; 1657 default: 1658 WARN_ON(1); 1659 break; 1660 } 1661 } 1662 } else if (ieee80211_is_action(mgmt->frame_control) && 1663 mgmt->u.action.category == WLAN_CATEGORY_HT) { 1664 switch (mgmt->u.action.action_code) { 1665 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { 1666 u8 chanwidth = mgmt->u.action.ht_notify_cw.chanwidth; 1667 struct ieee80211_rx_status *status; 1668 struct link_sta_info *link_sta; 1669 struct sta_info *sta; 1670 1671 sta = sta_info_get_bss(sdata, mgmt->sa); 1672 if (!sta) 1673 break; 1674 1675 status = IEEE80211_SKB_RXCB(skb); 1676 if (!status->link_valid) 1677 link_sta = &sta->deflink; 1678 else 1679 link_sta = rcu_dereference_protected(sta->link[status->link_id], 1680 lockdep_is_held(&local->hw.wiphy->mtx)); 1681 if (link_sta) 1682 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta, 1683 link_sta, chanwidth, 1684 status->band); 1685 break; 1686 } 1687 default: 1688 WARN_ON(1); 1689 break; 1690 } 1691 } else if (ieee80211_is_action(mgmt->frame_control) && 1692 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1693 switch (mgmt->u.action.action_code) { 1694 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1695 struct ieee80211_rx_status *status; 1696 enum nl80211_band band; 1697 struct sta_info *sta; 1698 u8 opmode; 1699 1700 status = IEEE80211_SKB_RXCB(skb); 1701 band = status->band; 1702 opmode = mgmt->u.action.vht_opmode_notif.operating_mode; 1703 1704 sta = sta_info_get_bss(sdata, mgmt->sa); 1705 1706 if (sta) 1707 ieee80211_vht_handle_opmode(sdata, 1708 &sta->deflink, 1709 opmode, band); 1710 1711 break; 1712 } 1713 case WLAN_VHT_ACTION_GROUPID_MGMT: 1714 ieee80211_process_mu_groups(sdata, &sdata->deflink, 1715 mgmt); 1716 break; 1717 default: 1718 WARN_ON(1); 1719 break; 1720 } 1721 } else if (ieee80211_is_action(mgmt->frame_control) && 1722 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1723 switch (mgmt->u.action.action_code) { 1724 case WLAN_S1G_TWT_TEARDOWN: 1725 case WLAN_S1G_TWT_SETUP: 1726 ieee80211_s1g_rx_twt_action(sdata, skb); 1727 break; 1728 default: 1729 break; 1730 } 1731 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1732 struct ieee80211_hdr *hdr = (void *)mgmt; 1733 struct sta_info *sta; 1734 1735 /* 1736 * So the frame isn't mgmt, but frame_control 1737 * is at the right place anyway, of course, so 1738 * the if statement is correct. 1739 * 1740 * Warn if we have other data frame types here, 1741 * they must not get here. 1742 */ 1743 WARN_ON(hdr->frame_control & 1744 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1745 WARN_ON(!(hdr->seq_ctrl & 1746 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1747 /* 1748 * This was a fragment of a frame, received while 1749 * a block-ack session was active. That cannot be 1750 * right, so terminate the session. 1751 */ 1752 sta = sta_info_get_bss(sdata, mgmt->sa); 1753 if (sta) { 1754 u16 tid = ieee80211_get_tid(hdr); 1755 1756 __ieee80211_stop_rx_ba_session( 1757 sta, tid, WLAN_BACK_RECIPIENT, 1758 WLAN_REASON_QSTA_REQUIRE_SETUP, 1759 true); 1760 } 1761 } else switch (sdata->vif.type) { 1762 case NL80211_IFTYPE_AP: 1763 ieee80211_ap_rx_queued_frame(sdata, skb); 1764 break; 1765 case NL80211_IFTYPE_STATION: 1766 ieee80211_sta_rx_queued_frame(sdata, skb); 1767 break; 1768 case NL80211_IFTYPE_ADHOC: 1769 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1770 break; 1771 case NL80211_IFTYPE_MESH_POINT: 1772 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1773 break; 1774 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1775 break; 1776 default: 1777 WARN(1, "frame for unexpected interface type"); 1778 break; 1779 } 1780 } 1781 1782 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata, 1783 struct sk_buff *skb) 1784 { 1785 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1786 1787 if (ieee80211_is_action(mgmt->frame_control) && 1788 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1789 switch (mgmt->u.action.action_code) { 1790 case WLAN_S1G_TWT_TEARDOWN: 1791 case WLAN_S1G_TWT_SETUP: 1792 ieee80211_s1g_status_twt_action(sdata, skb); 1793 break; 1794 default: 1795 break; 1796 } 1797 } 1798 } 1799 1800 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work) 1801 { 1802 struct ieee80211_sub_if_data *sdata = 1803 container_of(work, struct ieee80211_sub_if_data, work); 1804 struct ieee80211_local *local = sdata->local; 1805 struct sk_buff *skb; 1806 1807 if (!ieee80211_sdata_running(sdata)) 1808 return; 1809 1810 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1811 return; 1812 1813 if (!ieee80211_can_run_worker(local)) 1814 return; 1815 1816 /* first process frames */ 1817 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1818 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1819 1820 if (skb->protocol == cpu_to_be16(ETH_P_TDLS)) 1821 ieee80211_process_tdls_channel_switch(sdata, skb); 1822 else 1823 ieee80211_iface_process_skb(local, sdata, skb); 1824 1825 consume_skb(skb); 1826 kcov_remote_stop(); 1827 } 1828 1829 /* process status queue */ 1830 while ((skb = skb_dequeue(&sdata->status_queue))) { 1831 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1832 1833 ieee80211_iface_process_status(sdata, skb); 1834 consume_skb(skb); 1835 1836 kcov_remote_stop(); 1837 } 1838 1839 /* then other type-dependent work */ 1840 switch (sdata->vif.type) { 1841 case NL80211_IFTYPE_STATION: 1842 ieee80211_sta_work(sdata); 1843 break; 1844 case NL80211_IFTYPE_ADHOC: 1845 ieee80211_ibss_work(sdata); 1846 break; 1847 case NL80211_IFTYPE_MESH_POINT: 1848 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1849 break; 1850 ieee80211_mesh_work(sdata); 1851 break; 1852 case NL80211_IFTYPE_OCB: 1853 ieee80211_ocb_work(sdata); 1854 break; 1855 default: 1856 break; 1857 } 1858 } 1859 1860 static void ieee80211_activate_links_work(struct wiphy *wiphy, 1861 struct wiphy_work *work) 1862 { 1863 struct ieee80211_sub_if_data *sdata = 1864 container_of(work, struct ieee80211_sub_if_data, 1865 activate_links_work); 1866 struct ieee80211_local *local = wiphy_priv(wiphy); 1867 1868 if (local->in_reconfig) 1869 return; 1870 1871 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links); 1872 sdata->desired_active_links = 0; 1873 } 1874 1875 /* 1876 * Helper function to initialise an interface to a specific type. 1877 */ 1878 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1879 enum nl80211_iftype type) 1880 { 1881 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1882 0xff, 0xff, 0xff}; 1883 1884 /* clear type-dependent unions */ 1885 memset(&sdata->u, 0, sizeof(sdata->u)); 1886 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u)); 1887 1888 /* and set some type-dependent values */ 1889 sdata->vif.type = type; 1890 sdata->vif.p2p = false; 1891 sdata->wdev.iftype = type; 1892 1893 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1894 sdata->control_port_no_encrypt = false; 1895 sdata->control_port_over_nl80211 = false; 1896 sdata->control_port_no_preauth = false; 1897 sdata->vif.cfg.idle = true; 1898 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1899 1900 sdata->noack_map = 0; 1901 1902 /* only monitor/p2p-device differ */ 1903 if (sdata->dev) { 1904 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1905 sdata->dev->type = ARPHRD_ETHER; 1906 } 1907 1908 skb_queue_head_init(&sdata->skb_queue); 1909 skb_queue_head_init(&sdata->status_queue); 1910 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1911 wiphy_work_init(&sdata->activate_links_work, 1912 ieee80211_activate_links_work); 1913 1914 switch (type) { 1915 case NL80211_IFTYPE_P2P_GO: 1916 type = NL80211_IFTYPE_AP; 1917 sdata->vif.type = type; 1918 sdata->vif.p2p = true; 1919 fallthrough; 1920 case NL80211_IFTYPE_AP: 1921 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1922 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1923 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1924 break; 1925 case NL80211_IFTYPE_P2P_CLIENT: 1926 type = NL80211_IFTYPE_STATION; 1927 sdata->vif.type = type; 1928 sdata->vif.p2p = true; 1929 fallthrough; 1930 case NL80211_IFTYPE_STATION: 1931 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid; 1932 ieee80211_sta_setup_sdata(sdata); 1933 break; 1934 case NL80211_IFTYPE_OCB: 1935 sdata->vif.bss_conf.bssid = bssid_wildcard; 1936 ieee80211_ocb_setup_sdata(sdata); 1937 break; 1938 case NL80211_IFTYPE_ADHOC: 1939 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1940 ieee80211_ibss_setup_sdata(sdata); 1941 break; 1942 case NL80211_IFTYPE_MESH_POINT: 1943 if (ieee80211_vif_is_mesh(&sdata->vif)) 1944 ieee80211_mesh_init_sdata(sdata); 1945 break; 1946 case NL80211_IFTYPE_MONITOR: 1947 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1948 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1949 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1950 MONITOR_FLAG_OTHER_BSS; 1951 break; 1952 case NL80211_IFTYPE_NAN: 1953 if (!(sdata->local->hw.wiphy->nan_capa.flags & 1954 WIPHY_NAN_FLAGS_USERSPACE_DE)) { 1955 idr_init(&sdata->u.nan.de.function_inst_ids); 1956 spin_lock_init(&sdata->u.nan.de.func_lock); 1957 } 1958 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1959 break; 1960 case NL80211_IFTYPE_AP_VLAN: 1961 case NL80211_IFTYPE_P2P_DEVICE: 1962 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1963 break; 1964 case NL80211_IFTYPE_NAN_DATA: 1965 case NL80211_IFTYPE_PD: 1966 break; 1967 case NL80211_IFTYPE_UNSPECIFIED: 1968 case NL80211_IFTYPE_WDS: 1969 case NUM_NL80211_IFTYPES: 1970 WARN_ON(1); 1971 break; 1972 } 1973 1974 /* need to do this after the switch so vif.type is correct */ 1975 ieee80211_link_setup(&sdata->deflink); 1976 1977 ieee80211_debugfs_recreate_netdev(sdata, false); 1978 } 1979 1980 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 1981 enum nl80211_iftype type) 1982 { 1983 struct ieee80211_local *local = sdata->local; 1984 int ret, err; 1985 enum nl80211_iftype internal_type = type; 1986 bool p2p = false; 1987 1988 ASSERT_RTNL(); 1989 1990 if (!local->ops->change_interface) 1991 return -EBUSY; 1992 1993 /* for now, don't support changing while links exist */ 1994 if (ieee80211_vif_is_mld(&sdata->vif)) 1995 return -EBUSY; 1996 1997 switch (sdata->vif.type) { 1998 case NL80211_IFTYPE_AP: 1999 if (!list_empty(&sdata->u.ap.vlans)) 2000 return -EBUSY; 2001 break; 2002 case NL80211_IFTYPE_STATION: 2003 case NL80211_IFTYPE_ADHOC: 2004 case NL80211_IFTYPE_OCB: 2005 /* 2006 * Could maybe also all others here? 2007 * Just not sure how that interacts 2008 * with the RX/config path e.g. for 2009 * mesh. 2010 */ 2011 break; 2012 default: 2013 return -EBUSY; 2014 } 2015 2016 switch (type) { 2017 case NL80211_IFTYPE_AP: 2018 case NL80211_IFTYPE_STATION: 2019 case NL80211_IFTYPE_ADHOC: 2020 case NL80211_IFTYPE_OCB: 2021 /* 2022 * Could probably support everything 2023 * but here. 2024 */ 2025 break; 2026 case NL80211_IFTYPE_P2P_CLIENT: 2027 p2p = true; 2028 internal_type = NL80211_IFTYPE_STATION; 2029 break; 2030 case NL80211_IFTYPE_P2P_GO: 2031 p2p = true; 2032 internal_type = NL80211_IFTYPE_AP; 2033 break; 2034 default: 2035 return -EBUSY; 2036 } 2037 2038 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 2039 if (ret) 2040 return ret; 2041 2042 ieee80211_stop_vif_queues(local, sdata, 2043 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2044 /* do_stop will synchronize_rcu() first thing */ 2045 ieee80211_do_stop(sdata, false); 2046 2047 ieee80211_teardown_sdata(sdata); 2048 2049 ieee80211_set_sdata_offload_flags(sdata); 2050 ret = drv_change_interface(local, sdata, internal_type, p2p); 2051 if (ret) 2052 type = ieee80211_vif_type_p2p(&sdata->vif); 2053 2054 /* 2055 * Ignore return value here, there's not much we can do since 2056 * the driver changed the interface type internally already. 2057 * The warnings will hopefully make driver authors fix it :-) 2058 */ 2059 ieee80211_check_queues(sdata, type); 2060 2061 ieee80211_setup_sdata(sdata, type); 2062 ieee80211_set_vif_encap_ops(sdata); 2063 2064 err = ieee80211_do_open(&sdata->wdev, false); 2065 WARN(err, "type change: do_open returned %d", err); 2066 2067 ieee80211_wake_vif_queues(local, sdata, 2068 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2069 return ret; 2070 } 2071 2072 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 2073 enum nl80211_iftype type) 2074 { 2075 int ret; 2076 2077 ASSERT_RTNL(); 2078 2079 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 2080 return 0; 2081 2082 if (ieee80211_sdata_running(sdata)) { 2083 ret = ieee80211_runtime_change_iftype(sdata, type); 2084 if (ret) 2085 return ret; 2086 } else { 2087 /* Purge and reset type-dependent state. */ 2088 ieee80211_teardown_sdata(sdata); 2089 ieee80211_setup_sdata(sdata, type); 2090 } 2091 2092 /* reset some values that shouldn't be kept across type changes */ 2093 if (type == NL80211_IFTYPE_STATION) 2094 sdata->u.mgd.use_4addr = false; 2095 2096 return 0; 2097 } 2098 2099 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 2100 u8 *perm_addr, enum nl80211_iftype type) 2101 { 2102 struct ieee80211_sub_if_data *sdata; 2103 u64 mask, start, addr, val, inc; 2104 u8 *m; 2105 u8 tmp_addr[ETH_ALEN]; 2106 int i; 2107 2108 lockdep_assert_wiphy(local->hw.wiphy); 2109 2110 /* default ... something at least */ 2111 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 2112 2113 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 2114 local->hw.wiphy->n_addresses <= 1) 2115 return; 2116 2117 switch (type) { 2118 case NL80211_IFTYPE_MONITOR: 2119 /* doesn't matter */ 2120 break; 2121 case NL80211_IFTYPE_AP_VLAN: 2122 /* match up with an AP interface */ 2123 list_for_each_entry(sdata, &local->interfaces, list) { 2124 if (sdata->vif.type != NL80211_IFTYPE_AP) 2125 continue; 2126 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2127 break; 2128 } 2129 /* keep default if no AP interface present */ 2130 break; 2131 case NL80211_IFTYPE_P2P_CLIENT: 2132 case NL80211_IFTYPE_P2P_GO: 2133 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 2134 list_for_each_entry(sdata, &local->interfaces, list) { 2135 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 2136 continue; 2137 if (!ieee80211_sdata_running(sdata)) 2138 continue; 2139 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2140 return; 2141 } 2142 } 2143 fallthrough; 2144 default: 2145 /* assign a new address if possible -- try n_addresses first */ 2146 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 2147 bool used = false; 2148 2149 list_for_each_entry(sdata, &local->interfaces, list) { 2150 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 2151 sdata->vif.addr)) { 2152 used = true; 2153 break; 2154 } 2155 } 2156 2157 if (!used) { 2158 memcpy(perm_addr, 2159 local->hw.wiphy->addresses[i].addr, 2160 ETH_ALEN); 2161 break; 2162 } 2163 } 2164 2165 /* try mask if available */ 2166 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 2167 break; 2168 2169 m = local->hw.wiphy->addr_mask; 2170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2173 2174 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 2175 /* not a contiguous mask ... not handled now! */ 2176 pr_info("not contiguous\n"); 2177 break; 2178 } 2179 2180 /* 2181 * Pick address of existing interface in case user changed 2182 * MAC address manually, default to perm_addr. 2183 */ 2184 m = local->hw.wiphy->perm_addr; 2185 list_for_each_entry(sdata, &local->interfaces, list) { 2186 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 2187 continue; 2188 m = sdata->vif.addr; 2189 break; 2190 } 2191 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2192 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2193 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2194 2195 inc = 1ULL<<__ffs64(mask); 2196 val = (start & mask); 2197 addr = (start & ~mask) | (val & mask); 2198 do { 2199 bool used = false; 2200 2201 tmp_addr[5] = addr >> 0*8; 2202 tmp_addr[4] = addr >> 1*8; 2203 tmp_addr[3] = addr >> 2*8; 2204 tmp_addr[2] = addr >> 3*8; 2205 tmp_addr[1] = addr >> 4*8; 2206 tmp_addr[0] = addr >> 5*8; 2207 2208 val += inc; 2209 2210 list_for_each_entry(sdata, &local->interfaces, list) { 2211 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 2212 used = true; 2213 break; 2214 } 2215 } 2216 2217 if (!used) { 2218 memcpy(perm_addr, tmp_addr, ETH_ALEN); 2219 break; 2220 } 2221 addr = (start & ~mask) | (val & mask); 2222 } while (addr != start); 2223 2224 break; 2225 } 2226 } 2227 2228 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 2229 unsigned char name_assign_type, 2230 struct wireless_dev **new_wdev, enum nl80211_iftype type, 2231 struct vif_params *params) 2232 { 2233 struct net_device *ndev = NULL; 2234 struct ieee80211_sub_if_data *sdata = NULL; 2235 struct txq_info *txqi; 2236 int ret, i; 2237 2238 ASSERT_RTNL(); 2239 lockdep_assert_wiphy(local->hw.wiphy); 2240 2241 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 2242 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2243 sizeof(void *)); 2244 struct wireless_dev *wdev; 2245 int txq_size = 0; 2246 2247 if (type == NL80211_IFTYPE_NAN) 2248 txq_size = sizeof(struct txq_info) + 2249 local->hw.txq_data_size; 2250 2251 sdata = kzalloc(size + txq_size, GFP_KERNEL); 2252 if (!sdata) 2253 return -ENOMEM; 2254 wdev = &sdata->wdev; 2255 2256 sdata->dev = NULL; 2257 strscpy(sdata->name, name, IFNAMSIZ); 2258 2259 if (is_valid_ether_addr(params->macaddr)) 2260 memcpy(wdev->address, params->macaddr, ETH_ALEN); 2261 else 2262 ieee80211_assign_perm_addr(local, wdev->address, type); 2263 2264 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 2265 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2266 2267 /* 2268 * Add a management TXQ for NAN devices which includes frames 2269 * that will only be transmitted during discovery windows (DWs) 2270 */ 2271 if (type == NL80211_IFTYPE_NAN) { 2272 txqi = (struct txq_info *)((unsigned long)sdata + size); 2273 ieee80211_txq_init(sdata, NULL, txqi, 2274 IEEE80211_NUM_TIDS); 2275 } 2276 } else { 2277 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2278 sizeof(void *)); 2279 int txq_size = 0; 2280 2281 if (type != NL80211_IFTYPE_AP_VLAN && 2282 (type != NL80211_IFTYPE_MONITOR || 2283 (params->flags & MONITOR_FLAG_ACTIVE))) 2284 txq_size += sizeof(struct txq_info) + 2285 local->hw.txq_data_size; 2286 2287 ndev = alloc_netdev_mqs(size + txq_size, 2288 name, name_assign_type, 2289 ieee80211_if_setup, 1, 1); 2290 if (!ndev) 2291 return -ENOMEM; 2292 2293 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 2294 2295 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2296 2297 ndev->needed_headroom = local->tx_headroom + 2298 4*6 /* four MAC addresses */ 2299 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 2300 + 6 /* mesh */ 2301 + 8 /* rfc1042/bridge tunnel */ 2302 - ETH_HLEN /* ethernet hard_header_len */ 2303 + IEEE80211_ENCRYPT_HEADROOM; 2304 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 2305 2306 ret = dev_alloc_name(ndev, ndev->name); 2307 if (ret < 0) { 2308 free_netdev(ndev); 2309 return ret; 2310 } 2311 2312 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 2313 if (is_valid_ether_addr(params->macaddr)) 2314 eth_hw_addr_set(ndev, params->macaddr); 2315 else 2316 eth_hw_addr_set(ndev, ndev->perm_addr); 2317 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 2318 2319 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 2320 sdata = netdev_priv(ndev); 2321 ndev->ieee80211_ptr = &sdata->wdev; 2322 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 2323 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2324 memcpy(sdata->name, ndev->name, IFNAMSIZ); 2325 2326 if (txq_size) { 2327 txqi = netdev_priv(ndev) + size; 2328 ieee80211_txq_init(sdata, NULL, txqi, 0); 2329 } 2330 2331 sdata->dev = ndev; 2332 } 2333 2334 /* initialise type-independent data */ 2335 sdata->wdev.wiphy = local->hw.wiphy; 2336 2337 ieee80211_sdata_init(local, sdata); 2338 2339 ieee80211_init_frag_cache(&sdata->frags); 2340 2341 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk, 2342 ieee80211_delayed_tailroom_dec); 2343 2344 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2345 struct ieee80211_supported_band *sband; 2346 sband = local->hw.wiphy->bands[i]; 2347 sdata->rc_rateidx_mask[i] = 2348 sband ? (1 << sband->n_bitrates) - 1 : 0; 2349 if (sband) { 2350 __le16 cap; 2351 u16 *vht_rate_mask; 2352 2353 memcpy(sdata->rc_rateidx_mcs_mask[i], 2354 sband->ht_cap.mcs.rx_mask, 2355 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2356 2357 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 2358 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 2359 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 2360 } else { 2361 memset(sdata->rc_rateidx_mcs_mask[i], 0, 2362 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2363 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 2364 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 2365 } 2366 } 2367 2368 ieee80211_set_default_queues(sdata); 2369 2370 /* setup type-dependent data */ 2371 ieee80211_setup_sdata(sdata, type); 2372 2373 if (ndev) { 2374 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 2375 if (type == NL80211_IFTYPE_STATION) 2376 sdata->u.mgd.use_4addr = params->use_4addr; 2377 2378 ndev->features |= local->hw.netdev_features; 2379 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 2380 ndev->hw_features |= ndev->features & 2381 MAC80211_SUPPORTED_FEATURES_TX; 2382 sdata->vif.netdev_features = local->hw.netdev_features; 2383 2384 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2385 2386 /* MTU range is normally 256 - 2304, where the upper limit is 2387 * the maximum MSDU size. Monitor interfaces send and receive 2388 * MPDU and A-MSDU frames which may be much larger so we do 2389 * not impose an upper limit in that case. 2390 */ 2391 ndev->min_mtu = 256; 2392 if (type == NL80211_IFTYPE_MONITOR) 2393 ndev->max_mtu = 0; 2394 else 2395 ndev->max_mtu = local->hw.max_mtu; 2396 2397 ret = cfg80211_register_netdevice(ndev); 2398 if (ret) { 2399 free_netdev(ndev); 2400 return ret; 2401 } 2402 } 2403 2404 mutex_lock(&local->iflist_mtx); 2405 list_add_tail_rcu(&sdata->list, &local->interfaces); 2406 mutex_unlock(&local->iflist_mtx); 2407 2408 if (new_wdev) 2409 *new_wdev = &sdata->wdev; 2410 2411 return 0; 2412 } 2413 2414 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2415 { 2416 ASSERT_RTNL(); 2417 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2418 2419 mutex_lock(&sdata->local->iflist_mtx); 2420 list_del_rcu(&sdata->list); 2421 mutex_unlock(&sdata->local->iflist_mtx); 2422 2423 if (sdata->vif.txq) 2424 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2425 2426 if (sdata->vif.txq_mgmt) 2427 ieee80211_txq_purge(sdata->local, 2428 to_txq_info(sdata->vif.txq_mgmt)); 2429 2430 synchronize_rcu(); 2431 2432 cfg80211_unregister_wdev(&sdata->wdev); 2433 2434 if (!sdata->dev) { 2435 ieee80211_teardown_sdata(sdata); 2436 kfree(sdata); 2437 } 2438 } 2439 2440 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2441 { 2442 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2443 return; 2444 ieee80211_do_stop(sdata, true); 2445 } 2446 2447 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2448 { 2449 struct ieee80211_sub_if_data *sdata, *tmp; 2450 LIST_HEAD(unreg_list); 2451 2452 ASSERT_RTNL(); 2453 2454 /* Before destroying the interfaces, make sure they're all stopped so 2455 * that the hardware is stopped. Otherwise, the driver might still be 2456 * iterating the interfaces during the shutdown, e.g. from a worker 2457 * or from RX processing or similar, and if it does so (using atomic 2458 * iteration) while we're manipulating the list, the iteration will 2459 * crash. 2460 * 2461 * After this, the hardware should be stopped and the driver should 2462 * have stopped all of its activities, so that we can do RCU-unaware 2463 * manipulations of the interface list below. 2464 */ 2465 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2466 2467 guard(wiphy)(local->hw.wiphy); 2468 2469 WARN(local->open_count, "%s: open count remains %d\n", 2470 wiphy_name(local->hw.wiphy), local->open_count); 2471 2472 mutex_lock(&local->iflist_mtx); 2473 list_splice_init(&local->interfaces, &unreg_list); 2474 mutex_unlock(&local->iflist_mtx); 2475 2476 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) { 2477 bool netdev = sdata->dev; 2478 2479 /* 2480 * Remove IP addresses explicitly, since the notifier will 2481 * skip the callbacks if wdev->registered is false, since 2482 * we can't acquire the wiphy_lock() again there if already 2483 * inside this locked section. 2484 */ 2485 sdata->vif.cfg.arp_addr_cnt = 0; 2486 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2487 sdata->u.mgd.associated) 2488 ieee80211_vif_cfg_change_notify(sdata, 2489 BSS_CHANGED_ARP_FILTER); 2490 2491 list_del(&sdata->list); 2492 cfg80211_unregister_wdev(&sdata->wdev); 2493 2494 if (!netdev) 2495 kfree(sdata); 2496 } 2497 } 2498 2499 static int netdev_notify(struct notifier_block *nb, 2500 unsigned long state, void *ptr) 2501 { 2502 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2503 struct ieee80211_sub_if_data *sdata; 2504 2505 if (state != NETDEV_CHANGENAME) 2506 return NOTIFY_DONE; 2507 2508 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2509 return NOTIFY_DONE; 2510 2511 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2512 return NOTIFY_DONE; 2513 2514 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2515 memcpy(sdata->name, dev->name, IFNAMSIZ); 2516 ieee80211_debugfs_rename_netdev(sdata); 2517 2518 return NOTIFY_OK; 2519 } 2520 2521 static struct notifier_block mac80211_netdev_notifier = { 2522 .notifier_call = netdev_notify, 2523 }; 2524 2525 int ieee80211_iface_init(void) 2526 { 2527 return register_netdevice_notifier(&mac80211_netdev_notifier); 2528 } 2529 2530 void ieee80211_iface_exit(void) 2531 { 2532 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2533 } 2534 2535 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2536 { 2537 if (sdata->vif.type == NL80211_IFTYPE_AP) 2538 atomic_inc(&sdata->u.ap.num_mcast_sta); 2539 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2540 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2541 } 2542 2543 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2544 { 2545 if (sdata->vif.type == NL80211_IFTYPE_AP) 2546 atomic_dec(&sdata->u.ap.num_mcast_sta); 2547 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2548 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2549 } 2550 2551 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata) 2552 { 2553 struct ieee80211_local *local = sdata->local; 2554 2555 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) 2556 return; 2557 2558 ieee80211_stop_vif_queues_norefcount(local, sdata, 2559 IEEE80211_QUEUE_STOP_REASON_CSA); 2560 } 2561 2562 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata) 2563 { 2564 struct ieee80211_local *local = sdata->local; 2565 2566 ieee80211_wake_vif_queues_norefcount(local, sdata, 2567 IEEE80211_QUEUE_STOP_REASON_CSA); 2568 } 2569