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 ps = &sdata->bss->ps; 592 593 spin_lock_irqsave(&ps->bc_buf.lock, flags); 594 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 595 if (skb->dev == sdata->dev) { 596 __skb_unlink(skb, &ps->bc_buf); 597 local->total_ps_buffered--; 598 ieee80211_free_txskb(&local->hw, skb); 599 } 600 } 601 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 602 } 603 604 if (going_down) 605 local->open_count--; 606 607 switch (sdata->vif.type) { 608 case NL80211_IFTYPE_AP_VLAN: 609 list_del(&sdata->u.vlan.list); 610 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL); 611 /* see comment in the default case below */ 612 ieee80211_free_keys(sdata, true); 613 /* no need to tell driver */ 614 break; 615 case NL80211_IFTYPE_MONITOR: 616 local->monitors--; 617 618 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 619 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 620 621 local->virt_monitors--; 622 if (local->virt_monitors == 0) { 623 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 624 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 625 } 626 627 ieee80211_adjust_monitor_flags(sdata, -1); 628 } 629 break; 630 case NL80211_IFTYPE_NAN: 631 /* Check if any open NAN_DATA interfaces */ 632 list_for_each_entry(iter, &local->interfaces, list) { 633 WARN_ON(iter->vif.type == NL80211_IFTYPE_NAN_DATA && 634 ieee80211_sdata_running(iter)); 635 } 636 637 /* clean all the functions */ 638 if (!(local->hw.wiphy->nan_capa.flags & 639 WIPHY_NAN_FLAGS_USERSPACE_DE)) { 640 spin_lock_bh(&sdata->u.nan.de.func_lock); 641 642 idr_for_each_entry(&sdata->u.nan.de.function_inst_ids, 643 func, i) { 644 idr_remove(&sdata->u.nan.de.function_inst_ids, i); 645 cfg80211_free_nan_func(func); 646 } 647 idr_destroy(&sdata->u.nan.de.function_inst_ids); 648 649 spin_unlock_bh(&sdata->u.nan.de.func_lock); 650 } 651 break; 652 case NL80211_IFTYPE_NAN_DATA: 653 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL); 654 fallthrough; 655 default: 656 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 657 /* 658 * When we get here, the interface is marked down. 659 * Free the remaining keys, if there are any 660 * (which can happen in AP mode if userspace sets 661 * keys before the interface is operating) 662 * 663 * Force the key freeing to always synchronize_net() 664 * to wait for the RX path in case it is using this 665 * interface enqueuing frames at this very time on 666 * another CPU. 667 */ 668 ieee80211_free_keys(sdata, true); 669 skb_queue_purge(&sdata->skb_queue); 670 skb_queue_purge(&sdata->status_queue); 671 } 672 673 /* 674 * Since ieee80211_free_txskb() may issue __dev_queue_xmit() 675 * which should be called with interrupts enabled, reclamation 676 * is done in two phases: 677 */ 678 __skb_queue_head_init(&freeq); 679 680 /* unlink from local queues... */ 681 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 682 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 683 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 684 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 685 if (info->control.vif == &sdata->vif) { 686 __skb_unlink(skb, &local->pending[i]); 687 __skb_queue_tail(&freeq, skb); 688 } 689 } 690 } 691 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 692 693 /* ... and perform actual reclamation with interrupts enabled. */ 694 skb_queue_walk_safe(&freeq, skb, tmp) { 695 __skb_unlink(skb, &freeq); 696 ieee80211_free_txskb(&local->hw, skb); 697 } 698 699 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 700 ieee80211_txq_remove_vlan(local, sdata); 701 702 if (sdata->vif.txq) 703 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 704 705 if (sdata->vif.txq_mgmt) 706 ieee80211_txq_purge(sdata->local, 707 to_txq_info(sdata->vif.txq_mgmt)); 708 709 sdata->bss = NULL; 710 711 if (local->open_count == 0) 712 ieee80211_clear_tx_pending(local); 713 714 sdata->vif.bss_conf.beacon_int = 0; 715 716 /* 717 * If the interface goes down while suspended, presumably because 718 * the device was unplugged and that happens before our resume, 719 * then the driver is already unconfigured and the remainder of 720 * this function isn't needed. 721 * XXX: what about WoWLAN? If the device has software state, e.g. 722 * memory allocated, it might expect teardown commands from 723 * mac80211 here? 724 */ 725 if (local->suspended) { 726 WARN_ON(local->wowlan); 727 WARN_ON(rcu_access_pointer(local->monitor_sdata)); 728 return; 729 } 730 731 switch (sdata->vif.type) { 732 case NL80211_IFTYPE_AP_VLAN: 733 break; 734 case NL80211_IFTYPE_MONITOR: 735 if (local->virt_monitors == 0) 736 ieee80211_del_virtual_monitor(local); 737 738 ieee80211_recalc_idle(local); 739 ieee80211_recalc_offload(local); 740 741 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 742 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 743 break; 744 745 ieee80211_link_release_channel(&sdata->deflink); 746 fallthrough; 747 default: 748 if (!going_down) 749 break; 750 drv_remove_interface(local, sdata); 751 752 /* Clear private driver data to prevent reuse */ 753 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size); 754 } 755 756 ieee80211_recalc_ps(local); 757 758 if (cancel_scan) 759 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work); 760 761 if (local->open_count == 0) { 762 ieee80211_stop_device(local, false); 763 764 /* no reconfiguring after stop! */ 765 return; 766 } 767 768 /* do after stop to avoid reconfiguring when we stop anyway */ 769 ieee80211_configure_filter(local); 770 ieee80211_hw_config(local, -1, hw_reconf_flags); 771 772 /* Passing NULL means an interface is picked for configuration */ 773 if (local->virt_monitors == local->open_count) 774 ieee80211_add_virtual_monitor(local, NULL); 775 } 776 777 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata) 778 { 779 struct ieee80211_sub_if_data *tx_sdata; 780 struct ieee80211_bss_conf *link_conf, *tx_bss_conf; 781 struct ieee80211_link_data *tx_link, *link; 782 unsigned int link_id; 783 784 lockdep_assert_wiphy(sdata->local->hw.wiphy); 785 786 /* Check if any of the links of current sdata is an MBSSID. */ 787 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 788 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata); 789 if (!tx_bss_conf) 790 continue; 791 792 tx_sdata = vif_to_sdata(tx_bss_conf->vif); 793 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL); 794 795 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion 796 * while closing tx sdata at the end of outer loop below. 797 */ 798 if (sdata != tx_sdata) { 799 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id], 800 tx_sdata); 801 if (!tx_link) 802 continue; 803 804 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL); 805 } 806 807 /* loop through sdatas to find if any of their links 808 * belong to same MBSSID set as the one getting deleted. 809 */ 810 for_each_sdata_link(tx_sdata->local, link) { 811 struct ieee80211_sub_if_data *link_sdata = link->sdata; 812 813 if (link_sdata == sdata || link_sdata == tx_sdata || 814 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf) 815 continue; 816 817 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL); 818 819 /* Remove all links of matching MLD until dynamic link 820 * removal can be supported. 821 */ 822 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev, 823 GFP_KERNEL); 824 } 825 826 /* If we are not tx sdata, remove links of tx sdata and proceed */ 827 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) 828 cfg80211_stop_iface(tx_sdata->wdev.wiphy, 829 &tx_sdata->wdev, GFP_KERNEL); 830 } 831 } 832 833 static int ieee80211_stop(struct net_device *dev) 834 { 835 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 836 837 /* close dependent VLAN interfaces before locking wiphy */ 838 if (sdata->vif.type == NL80211_IFTYPE_AP) { 839 struct ieee80211_sub_if_data *vlan, *tmpsdata; 840 841 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 842 u.vlan.list) 843 dev_close(vlan->dev); 844 } 845 846 guard(wiphy)(sdata->local->hw.wiphy); 847 848 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work); 849 850 /* Close the dependent MBSSID interfaces with wiphy lock as we may be 851 * terminating its partner links too in case of MLD. 852 */ 853 if (sdata->vif.type == NL80211_IFTYPE_AP) 854 ieee80211_stop_mbssid(sdata); 855 856 ieee80211_do_stop(sdata, true); 857 858 return 0; 859 } 860 861 static void ieee80211_set_multicast_list(struct net_device *dev) 862 { 863 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 864 struct ieee80211_local *local = sdata->local; 865 int allmulti, sdata_allmulti; 866 867 allmulti = !!(dev->flags & IFF_ALLMULTI); 868 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 869 870 if (allmulti != sdata_allmulti) { 871 if (dev->flags & IFF_ALLMULTI) 872 atomic_inc(&local->iff_allmultis); 873 else 874 atomic_dec(&local->iff_allmultis); 875 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 876 } 877 878 spin_lock_bh(&local->filter_lock); 879 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 880 spin_unlock_bh(&local->filter_lock); 881 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter); 882 } 883 884 /* 885 * Called when the netdev is removed or, by the code below, before 886 * the interface type changes. 887 */ 888 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 889 { 890 if (WARN_ON(!list_empty(&sdata->work.entry))) 891 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 892 893 /* free extra data */ 894 ieee80211_free_keys(sdata, false); 895 896 ieee80211_debugfs_remove_netdev(sdata); 897 898 ieee80211_destroy_frag_cache(&sdata->frags); 899 900 if (ieee80211_vif_is_mesh(&sdata->vif)) 901 ieee80211_mesh_teardown_sdata(sdata); 902 903 ieee80211_vif_clear_links(sdata); 904 ieee80211_link_stop(&sdata->deflink); 905 906 if (sdata->vif.type == NL80211_IFTYPE_NAN) { 907 struct ieee80211_nan_sched_cfg *nan_sched = 908 &sdata->vif.cfg.nan_sched; 909 910 for (int i = 0; i < ARRAY_SIZE(nan_sched->channels); i++) 911 WARN_ON(nan_sched->channels[i].chanreq.oper.chan); 912 } 913 } 914 915 static void ieee80211_uninit(struct net_device *dev) 916 { 917 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev)); 918 } 919 920 static int ieee80211_netdev_setup_tc(struct net_device *dev, 921 enum tc_setup_type type, void *type_data) 922 { 923 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 924 struct ieee80211_local *local = sdata->local; 925 926 return drv_net_setup_tc(local, sdata, dev, type, type_data); 927 } 928 929 static const struct net_device_ops ieee80211_dataif_ops = { 930 .ndo_open = ieee80211_open, 931 .ndo_stop = ieee80211_stop, 932 .ndo_uninit = ieee80211_uninit, 933 .ndo_start_xmit = ieee80211_subif_start_xmit, 934 .ndo_set_rx_mode = ieee80211_set_multicast_list, 935 .ndo_set_mac_address = ieee80211_change_mac, 936 .ndo_setup_tc = ieee80211_netdev_setup_tc, 937 }; 938 939 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 940 struct sk_buff *skb, 941 struct net_device *sb_dev) 942 { 943 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 944 struct ieee80211_local *local = sdata->local; 945 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 946 struct ieee80211_hdr *hdr; 947 int len_rthdr; 948 949 if (local->hw.queues < IEEE80211_NUM_ACS) 950 return 0; 951 952 /* reset flags and info before parsing radiotap header */ 953 memset(info, 0, sizeof(*info)); 954 955 if (!ieee80211_parse_tx_radiotap(skb, dev)) 956 return 0; /* doesn't matter, frame will be dropped */ 957 958 len_rthdr = ieee80211_get_radiotap_len(skb->data); 959 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 960 if (skb->len < len_rthdr + 2 || 961 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 962 return 0; /* doesn't matter, frame will be dropped */ 963 964 return ieee80211_select_queue_80211(sdata, skb, hdr); 965 } 966 967 static const struct net_device_ops ieee80211_monitorif_ops = { 968 .ndo_open = ieee80211_open, 969 .ndo_stop = ieee80211_stop, 970 .ndo_uninit = ieee80211_uninit, 971 .ndo_start_xmit = ieee80211_monitor_start_xmit, 972 .ndo_set_rx_mode = ieee80211_set_multicast_list, 973 .ndo_set_mac_address = ieee80211_change_mac, 974 .ndo_select_queue = ieee80211_monitor_select_queue, 975 }; 976 977 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx, 978 struct net_device_path *path) 979 { 980 struct ieee80211_sub_if_data *sdata; 981 struct ieee80211_local *local; 982 struct sta_info *sta; 983 int ret = -ENOENT; 984 985 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev); 986 local = sdata->local; 987 988 if (!local->ops->net_fill_forward_path) 989 return -EOPNOTSUPP; 990 991 rcu_read_lock(); 992 switch (sdata->vif.type) { 993 case NL80211_IFTYPE_AP_VLAN: 994 sta = rcu_dereference(sdata->u.vlan.sta); 995 if (sta) 996 break; 997 if (sdata->wdev.use_4addr) 998 goto out; 999 if (is_multicast_ether_addr(ctx->daddr)) 1000 goto out; 1001 sta = sta_info_get_bss(sdata, ctx->daddr); 1002 break; 1003 case NL80211_IFTYPE_AP: 1004 if (is_multicast_ether_addr(ctx->daddr)) 1005 goto out; 1006 sta = sta_info_get(sdata, ctx->daddr); 1007 break; 1008 case NL80211_IFTYPE_STATION: 1009 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { 1010 sta = sta_info_get(sdata, ctx->daddr); 1011 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { 1012 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1013 goto out; 1014 1015 break; 1016 } 1017 } 1018 1019 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 1020 break; 1021 default: 1022 goto out; 1023 } 1024 1025 if (!sta) 1026 goto out; 1027 1028 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path); 1029 out: 1030 rcu_read_unlock(); 1031 1032 return ret; 1033 } 1034 1035 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1036 .ndo_open = ieee80211_open, 1037 .ndo_stop = ieee80211_stop, 1038 .ndo_uninit = ieee80211_uninit, 1039 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1040 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1041 .ndo_set_mac_address = ieee80211_change_mac, 1042 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path, 1043 .ndo_setup_tc = ieee80211_netdev_setup_tc, 1044 }; 1045 1046 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 1047 { 1048 switch (iftype) { 1049 /* P2P GO and client are mapped to AP/STATION types */ 1050 case NL80211_IFTYPE_AP: 1051 case NL80211_IFTYPE_STATION: 1052 return true; 1053 default: 1054 return false; 1055 } 1056 } 1057 1058 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 1059 { 1060 struct ieee80211_local *local = sdata->local; 1061 u32 flags; 1062 1063 flags = sdata->vif.offload_flags; 1064 1065 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 1066 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1067 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 1068 1069 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1070 local->hw.wiphy->frag_threshold != (u32)-1) 1071 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1072 1073 if (local->virt_monitors) 1074 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1075 } else { 1076 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1077 } 1078 1079 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 1080 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1081 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 1082 1083 if (local->virt_monitors && 1084 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 1085 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1086 } else { 1087 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1088 } 1089 1090 if (sdata->vif.offload_flags == flags) 1091 return false; 1092 1093 sdata->vif.offload_flags = flags; 1094 ieee80211_check_fast_rx_iface(sdata); 1095 return true; 1096 } 1097 1098 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 1099 { 1100 struct ieee80211_local *local = sdata->local; 1101 struct ieee80211_sub_if_data *bss = sdata; 1102 bool enabled; 1103 1104 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1105 if (!sdata->bss) 1106 return; 1107 1108 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 1109 } 1110 1111 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 1112 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 1113 return; 1114 1115 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 1116 if (sdata->wdev.use_4addr && 1117 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 1118 enabled = false; 1119 1120 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 1121 &ieee80211_dataif_ops; 1122 } 1123 1124 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 1125 { 1126 struct ieee80211_local *local = sdata->local; 1127 struct ieee80211_sub_if_data *vsdata; 1128 1129 if (ieee80211_set_sdata_offload_flags(sdata)) { 1130 drv_update_vif_offload(local, sdata); 1131 ieee80211_set_vif_encap_ops(sdata); 1132 } 1133 1134 list_for_each_entry(vsdata, &local->interfaces, list) { 1135 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 1136 vsdata->bss != &sdata->u.ap) 1137 continue; 1138 1139 ieee80211_set_vif_encap_ops(vsdata); 1140 } 1141 } 1142 1143 void ieee80211_recalc_offload(struct ieee80211_local *local) 1144 { 1145 struct ieee80211_sub_if_data *sdata; 1146 1147 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 1148 return; 1149 1150 lockdep_assert_wiphy(local->hw.wiphy); 1151 1152 list_for_each_entry(sdata, &local->interfaces, list) { 1153 if (!ieee80211_sdata_running(sdata)) 1154 continue; 1155 1156 ieee80211_recalc_sdata_offload(sdata); 1157 } 1158 } 1159 1160 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 1161 const int offset) 1162 { 1163 struct ieee80211_local *local = sdata->local; 1164 u32 flags = sdata->u.mntr.flags; 1165 1166 #define ADJUST(_f, _s) do { \ 1167 if (flags & MONITOR_FLAG_##_f) \ 1168 local->fif_##_s += offset; \ 1169 } while (0) 1170 1171 ADJUST(FCSFAIL, fcsfail); 1172 ADJUST(PLCPFAIL, plcpfail); 1173 ADJUST(CONTROL, control); 1174 ADJUST(CONTROL, pspoll); 1175 ADJUST(OTHER_BSS, other_bss); 1176 if (!(flags & MONITOR_FLAG_SKIP_TX)) 1177 local->tx_mntrs += offset; 1178 1179 #undef ADJUST 1180 } 1181 1182 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 1183 { 1184 struct ieee80211_local *local = sdata->local; 1185 int i; 1186 1187 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 1188 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 1189 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 1190 else if (local->hw.queues >= IEEE80211_NUM_ACS) 1191 sdata->vif.hw_queue[i] = i; 1192 else 1193 sdata->vif.hw_queue[i] = 0; 1194 } 1195 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 1196 } 1197 1198 static void ieee80211_sdata_init(struct ieee80211_local *local, 1199 struct ieee80211_sub_if_data *sdata) 1200 { 1201 sdata->local = local; 1202 1203 INIT_LIST_HEAD(&sdata->key_list); 1204 1205 /* 1206 * Initialize the default link, so we can use link_id 0 for non-MLD, 1207 * and that continues to work for non-MLD-aware drivers that use just 1208 * vif.bss_conf instead of vif.link_conf. 1209 * 1210 * Note that we never change this, so if link ID 0 isn't used in an 1211 * MLD connection, we get a separate allocation for it. 1212 */ 1213 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf); 1214 } 1215 1216 int ieee80211_add_virtual_monitor(struct ieee80211_local *local, 1217 struct ieee80211_sub_if_data *creator_sdata) 1218 { 1219 struct ieee80211_sub_if_data *sdata; 1220 int ret; 1221 1222 ASSERT_RTNL(); 1223 lockdep_assert_wiphy(local->hw.wiphy); 1224 1225 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1226 return 0; 1227 1228 /* Already have a monitor set up, configure it */ 1229 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 1230 if (sdata) 1231 goto configure_monitor; 1232 1233 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 1234 if (!sdata) 1235 return -ENOMEM; 1236 1237 /* set up data */ 1238 sdata->vif.type = NL80211_IFTYPE_MONITOR; 1239 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 1240 wiphy_name(local->hw.wiphy)); 1241 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 1242 sdata->wdev.wiphy = local->hw.wiphy; 1243 1244 ieee80211_sdata_init(local, sdata); 1245 1246 ieee80211_set_default_queues(sdata); 1247 1248 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) { 1249 ret = drv_add_interface(local, sdata); 1250 if (WARN_ON(ret)) { 1251 /* ok .. stupid driver, it asked for this! */ 1252 kfree(sdata); 1253 return ret; 1254 } 1255 } 1256 1257 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 1258 if (ret) { 1259 kfree(sdata); 1260 return ret; 1261 } 1262 1263 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1264 1265 mutex_lock(&local->iflist_mtx); 1266 rcu_assign_pointer(local->monitor_sdata, sdata); 1267 mutex_unlock(&local->iflist_mtx); 1268 1269 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq, 1270 IEEE80211_CHANCTX_EXCLUSIVE); 1271 if (ret) { 1272 mutex_lock(&local->iflist_mtx); 1273 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1274 mutex_unlock(&local->iflist_mtx); 1275 synchronize_net(); 1276 drv_remove_interface(local, sdata); 1277 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1278 kfree(sdata); 1279 return ret; 1280 } 1281 1282 skb_queue_head_init(&sdata->skb_queue); 1283 skb_queue_head_init(&sdata->status_queue); 1284 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1285 1286 configure_monitor: 1287 /* Copy in the MU-MIMO configuration if set */ 1288 if (!creator_sdata) { 1289 struct ieee80211_sub_if_data *other; 1290 1291 list_for_each_entry_rcu(other, &local->mon_list, u.mntr.list) { 1292 if (!other->vif.bss_conf.mu_mimo_owner) 1293 continue; 1294 1295 creator_sdata = other; 1296 break; 1297 } 1298 } 1299 1300 if (creator_sdata && creator_sdata->vif.bss_conf.mu_mimo_owner) { 1301 sdata->vif.bss_conf.mu_mimo_owner = true; 1302 memcpy(&sdata->vif.bss_conf.mu_group, 1303 &creator_sdata->vif.bss_conf.mu_group, 1304 sizeof(sdata->vif.bss_conf.mu_group)); 1305 memcpy(&sdata->u.mntr.mu_follow_addr, 1306 creator_sdata->u.mntr.mu_follow_addr, ETH_ALEN); 1307 1308 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1309 BSS_CHANGED_MU_GROUPS); 1310 } 1311 1312 return 0; 1313 } 1314 1315 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 1316 { 1317 struct ieee80211_sub_if_data *sdata; 1318 1319 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1320 return; 1321 1322 ASSERT_RTNL(); 1323 lockdep_assert_wiphy(local->hw.wiphy); 1324 1325 mutex_lock(&local->iflist_mtx); 1326 1327 sdata = rcu_dereference_protected(local->monitor_sdata, 1328 lockdep_is_held(&local->iflist_mtx)); 1329 if (!sdata) { 1330 mutex_unlock(&local->iflist_mtx); 1331 return; 1332 } 1333 1334 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1335 ieee80211_link_release_channel(&sdata->deflink); 1336 1337 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1338 drv_remove_interface(local, sdata); 1339 1340 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1341 mutex_unlock(&local->iflist_mtx); 1342 1343 synchronize_net(); 1344 1345 kfree(sdata); 1346 } 1347 1348 /* 1349 * NOTE: Be very careful when changing this function, it must NOT return 1350 * an error on interface type changes that have been pre-checked, so most 1351 * checks should be in ieee80211_check_concurrent_iface. 1352 */ 1353 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1354 { 1355 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1356 struct net_device *dev = wdev->netdev; 1357 struct ieee80211_local *local = sdata->local; 1358 u64 changed = 0; 1359 int res; 1360 u32 hw_reconf_flags = 0; 1361 1362 lockdep_assert_wiphy(local->hw.wiphy); 1363 1364 switch (sdata->vif.type) { 1365 case NL80211_IFTYPE_AP_VLAN: { 1366 struct ieee80211_sub_if_data *master; 1367 1368 if (!sdata->bss) 1369 return -ENOLINK; 1370 1371 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1372 1373 master = container_of(sdata->bss, 1374 struct ieee80211_sub_if_data, u.ap); 1375 sdata->control_port_protocol = 1376 master->control_port_protocol; 1377 sdata->control_port_no_encrypt = 1378 master->control_port_no_encrypt; 1379 sdata->control_port_over_nl80211 = 1380 master->control_port_over_nl80211; 1381 sdata->control_port_no_preauth = 1382 master->control_port_no_preauth; 1383 sdata->vif.cab_queue = master->vif.cab_queue; 1384 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1385 sizeof(sdata->vif.hw_queue)); 1386 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq; 1387 1388 sdata->crypto_tx_tailroom_needed_cnt += 1389 master->crypto_tx_tailroom_needed_cnt; 1390 1391 ieee80211_apvlan_link_setup(sdata); 1392 1393 break; 1394 } 1395 case NL80211_IFTYPE_AP: 1396 case NL80211_IFTYPE_MESH_POINT: 1397 case NL80211_IFTYPE_STATION: 1398 case NL80211_IFTYPE_MONITOR: 1399 case NL80211_IFTYPE_ADHOC: 1400 case NL80211_IFTYPE_P2P_DEVICE: 1401 case NL80211_IFTYPE_OCB: 1402 case NL80211_IFTYPE_NAN: 1403 /* no special treatment */ 1404 break; 1405 case NL80211_IFTYPE_NAN_DATA: 1406 if (WARN_ON(!rcu_access_pointer(sdata->u.nan_data.nmi))) 1407 return -ENOLINK; 1408 break; 1409 case NL80211_IFTYPE_UNSPECIFIED: 1410 case NUM_NL80211_IFTYPES: 1411 case NL80211_IFTYPE_P2P_CLIENT: 1412 case NL80211_IFTYPE_P2P_GO: 1413 case NL80211_IFTYPE_WDS: 1414 /* cannot happen */ 1415 WARN_ON(1); 1416 break; 1417 } 1418 1419 if (local->open_count == 0) { 1420 /* here we can consider everything in good order (again) */ 1421 local->reconfig_failure = false; 1422 1423 res = drv_start(local); 1424 if (res) { 1425 /* 1426 * no need to worry about AP_VLAN/NAN_DATA cleanup since 1427 * in that case we can't have open_count == 0 1428 */ 1429 return res; 1430 } 1431 ieee80211_led_radio(local, true); 1432 ieee80211_mod_tpt_led_trig(local, 1433 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1434 } 1435 1436 /* 1437 * Copy the hopefully now-present MAC address to 1438 * this interface, if it has the special null one. 1439 */ 1440 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1441 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr); 1442 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1443 1444 if (!is_valid_ether_addr(dev->dev_addr)) { 1445 res = -EADDRNOTAVAIL; 1446 goto err_stop; 1447 } 1448 } 1449 1450 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR || 1451 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE); 1452 switch (sdata->vif.type) { 1453 case NL80211_IFTYPE_AP_VLAN: 1454 /* no need to tell driver, but set carrier and chanctx */ 1455 if (sdata->bss->active) { 1456 struct ieee80211_link_data *link; 1457 1458 for_each_link_data(sdata, link) { 1459 ieee80211_link_vlan_copy_chanctx(link); 1460 } 1461 1462 netif_carrier_on(dev); 1463 ieee80211_set_vif_encap_ops(sdata); 1464 } else { 1465 netif_carrier_off(dev); 1466 } 1467 break; 1468 case NL80211_IFTYPE_MONITOR: 1469 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) || 1470 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 1471 res = drv_add_interface(local, sdata); 1472 if (res) 1473 goto err_stop; 1474 } else { 1475 /* add/configure if there is no non-monitor interface */ 1476 if (local->virt_monitors == local->open_count) { 1477 res = ieee80211_add_virtual_monitor(local, sdata); 1478 if (res) 1479 goto err_stop; 1480 } 1481 1482 local->virt_monitors++; 1483 1484 /* must be before the call to ieee80211_configure_filter */ 1485 if (local->virt_monitors == 1) { 1486 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1487 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1488 } 1489 } 1490 1491 local->monitors++; 1492 1493 ieee80211_adjust_monitor_flags(sdata, 1); 1494 ieee80211_configure_filter(local); 1495 ieee80211_recalc_offload(local); 1496 ieee80211_recalc_idle(local); 1497 1498 netif_carrier_on(dev); 1499 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1500 break; 1501 case NL80211_IFTYPE_AP: 1502 sdata->bss = &sdata->u.ap; 1503 fallthrough; 1504 default: 1505 if (coming_up) { 1506 ieee80211_del_virtual_monitor(local); 1507 ieee80211_set_sdata_offload_flags(sdata); 1508 1509 res = drv_add_interface(local, sdata); 1510 if (res) 1511 goto err_stop; 1512 1513 ieee80211_set_vif_encap_ops(sdata); 1514 res = ieee80211_check_queues(sdata, 1515 ieee80211_vif_type_p2p(&sdata->vif)); 1516 if (res) 1517 goto err_del_interface; 1518 } 1519 1520 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1521 local->fif_pspoll++; 1522 local->fif_probe_req++; 1523 1524 ieee80211_configure_filter(local); 1525 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1526 local->fif_probe_req++; 1527 } 1528 1529 if (sdata->vif.probe_req_reg) 1530 drv_config_iface_filter(local, sdata, 1531 FIF_PROBE_REQ, 1532 FIF_PROBE_REQ); 1533 1534 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1535 sdata->vif.type != NL80211_IFTYPE_NAN) 1536 changed |= ieee80211_reset_erp_info(sdata); 1537 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1538 changed); 1539 1540 switch (sdata->vif.type) { 1541 case NL80211_IFTYPE_STATION: 1542 case NL80211_IFTYPE_ADHOC: 1543 case NL80211_IFTYPE_AP: 1544 case NL80211_IFTYPE_MESH_POINT: 1545 case NL80211_IFTYPE_OCB: 1546 case NL80211_IFTYPE_NAN_DATA: 1547 netif_carrier_off(dev); 1548 break; 1549 case NL80211_IFTYPE_P2P_DEVICE: 1550 case NL80211_IFTYPE_NAN: 1551 break; 1552 default: 1553 /* not reached */ 1554 WARN_ON(1); 1555 } 1556 1557 /* 1558 * Set default queue parameters so drivers don't 1559 * need to initialise the hardware if the hardware 1560 * doesn't start up with sane defaults. 1561 * Enable QoS for anything but station interfaces. 1562 */ 1563 ieee80211_set_wmm_default(&sdata->deflink, true, 1564 sdata->vif.type != NL80211_IFTYPE_STATION); 1565 } 1566 1567 /* 1568 * set_multicast_list will be invoked by the networking core 1569 * which will check whether any increments here were done in 1570 * error and sync them down to the hardware as filter flags. 1571 */ 1572 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1573 atomic_inc(&local->iff_allmultis); 1574 1575 if (coming_up) 1576 local->open_count++; 1577 1578 if (local->open_count == 1) 1579 ieee80211_hw_conf_init(local); 1580 else if (hw_reconf_flags) 1581 ieee80211_hw_config(local, -1, hw_reconf_flags); 1582 1583 ieee80211_recalc_ps(local); 1584 1585 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1586 1587 return 0; 1588 err_del_interface: 1589 drv_remove_interface(local, sdata); 1590 err_stop: 1591 if (!local->open_count) 1592 drv_stop(local, false); 1593 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 1594 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL); 1595 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1596 list_del(&sdata->u.vlan.list); 1597 /* Might not be initialized yet, but it is harmless */ 1598 sdata->bss = NULL; 1599 return res; 1600 } 1601 1602 static void ieee80211_if_setup(struct net_device *dev) 1603 { 1604 ether_setup(dev); 1605 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1606 dev->priv_flags |= IFF_NO_QUEUE; 1607 dev->netdev_ops = &ieee80211_dataif_ops; 1608 dev->needs_free_netdev = true; 1609 } 1610 1611 static void ieee80211_iface_process_skb(struct ieee80211_local *local, 1612 struct ieee80211_sub_if_data *sdata, 1613 struct sk_buff *skb) 1614 { 1615 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1616 1617 lockdep_assert_wiphy(local->hw.wiphy); 1618 1619 if (ieee80211_is_action(mgmt->frame_control) && 1620 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1621 struct sta_info *sta; 1622 int len = skb->len; 1623 1624 sta = sta_info_get_bss(sdata, mgmt->sa); 1625 if (sta) { 1626 switch (mgmt->u.action.action_code) { 1627 case WLAN_ACTION_ADDBA_REQ: 1628 case WLAN_ACTION_NDP_ADDBA_REQ: 1629 ieee80211_process_addba_request(local, sta, 1630 mgmt, len); 1631 break; 1632 case WLAN_ACTION_ADDBA_RESP: 1633 case WLAN_ACTION_NDP_ADDBA_RESP: 1634 ieee80211_process_addba_resp(local, sta, 1635 mgmt, len); 1636 break; 1637 case WLAN_ACTION_DELBA: 1638 case WLAN_ACTION_NDP_DELBA: 1639 ieee80211_process_delba(sdata, sta, 1640 mgmt, len); 1641 break; 1642 default: 1643 WARN_ON(1); 1644 break; 1645 } 1646 } 1647 } else if (ieee80211_is_action(mgmt->frame_control) && 1648 mgmt->u.action.category == WLAN_CATEGORY_HT) { 1649 switch (mgmt->u.action.action_code) { 1650 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { 1651 u8 chanwidth = mgmt->u.action.ht_notify_cw.chanwidth; 1652 struct ieee80211_rx_status *status; 1653 struct link_sta_info *link_sta; 1654 struct sta_info *sta; 1655 1656 sta = sta_info_get_bss(sdata, mgmt->sa); 1657 if (!sta) 1658 break; 1659 1660 status = IEEE80211_SKB_RXCB(skb); 1661 if (!status->link_valid) 1662 link_sta = &sta->deflink; 1663 else 1664 link_sta = rcu_dereference_protected(sta->link[status->link_id], 1665 lockdep_is_held(&local->hw.wiphy->mtx)); 1666 if (link_sta) 1667 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta, 1668 link_sta, chanwidth, 1669 status->band); 1670 break; 1671 } 1672 default: 1673 WARN_ON(1); 1674 break; 1675 } 1676 } else if (ieee80211_is_action(mgmt->frame_control) && 1677 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1678 switch (mgmt->u.action.action_code) { 1679 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1680 struct ieee80211_rx_status *status; 1681 enum nl80211_band band; 1682 struct sta_info *sta; 1683 u8 opmode; 1684 1685 status = IEEE80211_SKB_RXCB(skb); 1686 band = status->band; 1687 opmode = mgmt->u.action.vht_opmode_notif.operating_mode; 1688 1689 sta = sta_info_get_bss(sdata, mgmt->sa); 1690 1691 if (sta) 1692 ieee80211_vht_handle_opmode(sdata, 1693 &sta->deflink, 1694 opmode, band); 1695 1696 break; 1697 } 1698 case WLAN_VHT_ACTION_GROUPID_MGMT: 1699 ieee80211_process_mu_groups(sdata, &sdata->deflink, 1700 mgmt); 1701 break; 1702 default: 1703 WARN_ON(1); 1704 break; 1705 } 1706 } else if (ieee80211_is_action(mgmt->frame_control) && 1707 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1708 switch (mgmt->u.action.action_code) { 1709 case WLAN_S1G_TWT_TEARDOWN: 1710 case WLAN_S1G_TWT_SETUP: 1711 ieee80211_s1g_rx_twt_action(sdata, skb); 1712 break; 1713 default: 1714 break; 1715 } 1716 } else if (ieee80211_is_action(mgmt->frame_control) && 1717 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) { 1718 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1719 switch (mgmt->u.action.action_code) { 1720 case WLAN_PROTECTED_EHT_ACTION_EML_OP_MODE_NOTIF: 1721 ieee80211_rx_eml_op_mode_notif(sdata, skb); 1722 break; 1723 default: 1724 break; 1725 } 1726 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) { 1727 switch (mgmt->u.action.action_code) { 1728 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ: 1729 ieee80211_process_neg_ttlm_req(sdata, mgmt, 1730 skb->len); 1731 break; 1732 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES: 1733 ieee80211_process_neg_ttlm_res(sdata, mgmt, 1734 skb->len); 1735 break; 1736 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN: 1737 ieee80211_process_ttlm_teardown(sdata); 1738 break; 1739 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP: 1740 ieee80211_process_ml_reconf_resp(sdata, mgmt, 1741 skb->len); 1742 break; 1743 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP: 1744 ieee80211_process_epcs_ena_resp(sdata, mgmt, 1745 skb->len); 1746 break; 1747 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN: 1748 ieee80211_process_epcs_teardown(sdata, mgmt, 1749 skb->len); 1750 break; 1751 default: 1752 break; 1753 } 1754 } 1755 } else if (ieee80211_is_ext(mgmt->frame_control)) { 1756 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1757 ieee80211_sta_rx_queued_ext(sdata, skb); 1758 else 1759 WARN_ON(1); 1760 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1761 struct ieee80211_hdr *hdr = (void *)mgmt; 1762 struct sta_info *sta; 1763 1764 /* 1765 * So the frame isn't mgmt, but frame_control 1766 * is at the right place anyway, of course, so 1767 * the if statement is correct. 1768 * 1769 * Warn if we have other data frame types here, 1770 * they must not get here. 1771 */ 1772 WARN_ON(hdr->frame_control & 1773 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1774 WARN_ON(!(hdr->seq_ctrl & 1775 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1776 /* 1777 * This was a fragment of a frame, received while 1778 * a block-ack session was active. That cannot be 1779 * right, so terminate the session. 1780 */ 1781 sta = sta_info_get_bss(sdata, mgmt->sa); 1782 if (sta) { 1783 u16 tid = ieee80211_get_tid(hdr); 1784 1785 __ieee80211_stop_rx_ba_session( 1786 sta, tid, WLAN_BACK_RECIPIENT, 1787 WLAN_REASON_QSTA_REQUIRE_SETUP, 1788 true); 1789 } 1790 } else switch (sdata->vif.type) { 1791 case NL80211_IFTYPE_STATION: 1792 ieee80211_sta_rx_queued_mgmt(sdata, skb); 1793 break; 1794 case NL80211_IFTYPE_ADHOC: 1795 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1796 break; 1797 case NL80211_IFTYPE_MESH_POINT: 1798 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1799 break; 1800 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1801 break; 1802 default: 1803 WARN(1, "frame for unexpected interface type"); 1804 break; 1805 } 1806 } 1807 1808 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata, 1809 struct sk_buff *skb) 1810 { 1811 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1812 1813 if (ieee80211_is_action(mgmt->frame_control) && 1814 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1815 switch (mgmt->u.action.action_code) { 1816 case WLAN_S1G_TWT_TEARDOWN: 1817 case WLAN_S1G_TWT_SETUP: 1818 ieee80211_s1g_status_twt_action(sdata, skb); 1819 break; 1820 default: 1821 break; 1822 } 1823 } 1824 } 1825 1826 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work) 1827 { 1828 struct ieee80211_sub_if_data *sdata = 1829 container_of(work, struct ieee80211_sub_if_data, work); 1830 struct ieee80211_local *local = sdata->local; 1831 struct sk_buff *skb; 1832 1833 if (!ieee80211_sdata_running(sdata)) 1834 return; 1835 1836 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1837 return; 1838 1839 if (!ieee80211_can_run_worker(local)) 1840 return; 1841 1842 /* first process frames */ 1843 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1844 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1845 1846 if (skb->protocol == cpu_to_be16(ETH_P_TDLS)) 1847 ieee80211_process_tdls_channel_switch(sdata, skb); 1848 else 1849 ieee80211_iface_process_skb(local, sdata, skb); 1850 1851 consume_skb(skb); 1852 kcov_remote_stop(); 1853 } 1854 1855 /* process status queue */ 1856 while ((skb = skb_dequeue(&sdata->status_queue))) { 1857 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1858 1859 ieee80211_iface_process_status(sdata, skb); 1860 consume_skb(skb); 1861 1862 kcov_remote_stop(); 1863 } 1864 1865 /* then other type-dependent work */ 1866 switch (sdata->vif.type) { 1867 case NL80211_IFTYPE_STATION: 1868 ieee80211_sta_work(sdata); 1869 break; 1870 case NL80211_IFTYPE_ADHOC: 1871 ieee80211_ibss_work(sdata); 1872 break; 1873 case NL80211_IFTYPE_MESH_POINT: 1874 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1875 break; 1876 ieee80211_mesh_work(sdata); 1877 break; 1878 case NL80211_IFTYPE_OCB: 1879 ieee80211_ocb_work(sdata); 1880 break; 1881 default: 1882 break; 1883 } 1884 } 1885 1886 static void ieee80211_activate_links_work(struct wiphy *wiphy, 1887 struct wiphy_work *work) 1888 { 1889 struct ieee80211_sub_if_data *sdata = 1890 container_of(work, struct ieee80211_sub_if_data, 1891 activate_links_work); 1892 struct ieee80211_local *local = wiphy_priv(wiphy); 1893 1894 if (local->in_reconfig) 1895 return; 1896 1897 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links); 1898 sdata->desired_active_links = 0; 1899 } 1900 1901 /* 1902 * Helper function to initialise an interface to a specific type. 1903 */ 1904 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1905 enum nl80211_iftype type) 1906 { 1907 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1908 0xff, 0xff, 0xff}; 1909 1910 /* clear type-dependent unions */ 1911 memset(&sdata->u, 0, sizeof(sdata->u)); 1912 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u)); 1913 1914 /* and set some type-dependent values */ 1915 sdata->vif.type = type; 1916 sdata->vif.p2p = false; 1917 sdata->wdev.iftype = type; 1918 1919 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1920 sdata->control_port_no_encrypt = false; 1921 sdata->control_port_over_nl80211 = false; 1922 sdata->control_port_no_preauth = false; 1923 sdata->vif.cfg.idle = true; 1924 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1925 1926 sdata->noack_map = 0; 1927 1928 /* only monitor/p2p-device differ */ 1929 if (sdata->dev) { 1930 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1931 sdata->dev->type = ARPHRD_ETHER; 1932 } 1933 1934 skb_queue_head_init(&sdata->skb_queue); 1935 skb_queue_head_init(&sdata->status_queue); 1936 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1937 wiphy_work_init(&sdata->activate_links_work, 1938 ieee80211_activate_links_work); 1939 1940 switch (type) { 1941 case NL80211_IFTYPE_P2P_GO: 1942 type = NL80211_IFTYPE_AP; 1943 sdata->vif.type = type; 1944 sdata->vif.p2p = true; 1945 fallthrough; 1946 case NL80211_IFTYPE_AP: 1947 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1948 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1949 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1950 break; 1951 case NL80211_IFTYPE_P2P_CLIENT: 1952 type = NL80211_IFTYPE_STATION; 1953 sdata->vif.type = type; 1954 sdata->vif.p2p = true; 1955 fallthrough; 1956 case NL80211_IFTYPE_STATION: 1957 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid; 1958 ieee80211_sta_setup_sdata(sdata); 1959 break; 1960 case NL80211_IFTYPE_OCB: 1961 sdata->vif.bss_conf.bssid = bssid_wildcard; 1962 ieee80211_ocb_setup_sdata(sdata); 1963 break; 1964 case NL80211_IFTYPE_ADHOC: 1965 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1966 ieee80211_ibss_setup_sdata(sdata); 1967 break; 1968 case NL80211_IFTYPE_MESH_POINT: 1969 if (ieee80211_vif_is_mesh(&sdata->vif)) 1970 ieee80211_mesh_init_sdata(sdata); 1971 break; 1972 case NL80211_IFTYPE_MONITOR: 1973 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1974 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1975 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1976 MONITOR_FLAG_OTHER_BSS; 1977 break; 1978 case NL80211_IFTYPE_NAN: 1979 if (!(sdata->local->hw.wiphy->nan_capa.flags & 1980 WIPHY_NAN_FLAGS_USERSPACE_DE)) { 1981 idr_init(&sdata->u.nan.de.function_inst_ids); 1982 spin_lock_init(&sdata->u.nan.de.func_lock); 1983 } 1984 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1985 break; 1986 case NL80211_IFTYPE_AP_VLAN: 1987 case NL80211_IFTYPE_P2P_DEVICE: 1988 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1989 break; 1990 case NL80211_IFTYPE_NAN_DATA: 1991 break; 1992 case NL80211_IFTYPE_UNSPECIFIED: 1993 case NL80211_IFTYPE_WDS: 1994 case NUM_NL80211_IFTYPES: 1995 WARN_ON(1); 1996 break; 1997 } 1998 1999 /* need to do this after the switch so vif.type is correct */ 2000 ieee80211_link_setup(&sdata->deflink); 2001 2002 ieee80211_debugfs_recreate_netdev(sdata, false); 2003 } 2004 2005 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 2006 enum nl80211_iftype type) 2007 { 2008 struct ieee80211_local *local = sdata->local; 2009 int ret, err; 2010 enum nl80211_iftype internal_type = type; 2011 bool p2p = false; 2012 2013 ASSERT_RTNL(); 2014 2015 if (!local->ops->change_interface) 2016 return -EBUSY; 2017 2018 /* for now, don't support changing while links exist */ 2019 if (ieee80211_vif_is_mld(&sdata->vif)) 2020 return -EBUSY; 2021 2022 switch (sdata->vif.type) { 2023 case NL80211_IFTYPE_AP: 2024 if (!list_empty(&sdata->u.ap.vlans)) 2025 return -EBUSY; 2026 break; 2027 case NL80211_IFTYPE_STATION: 2028 case NL80211_IFTYPE_ADHOC: 2029 case NL80211_IFTYPE_OCB: 2030 /* 2031 * Could maybe also all others here? 2032 * Just not sure how that interacts 2033 * with the RX/config path e.g. for 2034 * mesh. 2035 */ 2036 break; 2037 default: 2038 return -EBUSY; 2039 } 2040 2041 switch (type) { 2042 case NL80211_IFTYPE_AP: 2043 case NL80211_IFTYPE_STATION: 2044 case NL80211_IFTYPE_ADHOC: 2045 case NL80211_IFTYPE_OCB: 2046 /* 2047 * Could probably support everything 2048 * but here. 2049 */ 2050 break; 2051 case NL80211_IFTYPE_P2P_CLIENT: 2052 p2p = true; 2053 internal_type = NL80211_IFTYPE_STATION; 2054 break; 2055 case NL80211_IFTYPE_P2P_GO: 2056 p2p = true; 2057 internal_type = NL80211_IFTYPE_AP; 2058 break; 2059 default: 2060 return -EBUSY; 2061 } 2062 2063 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 2064 if (ret) 2065 return ret; 2066 2067 ieee80211_stop_vif_queues(local, sdata, 2068 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2069 /* do_stop will synchronize_rcu() first thing */ 2070 ieee80211_do_stop(sdata, false); 2071 2072 ieee80211_teardown_sdata(sdata); 2073 2074 ieee80211_set_sdata_offload_flags(sdata); 2075 ret = drv_change_interface(local, sdata, internal_type, p2p); 2076 if (ret) 2077 type = ieee80211_vif_type_p2p(&sdata->vif); 2078 2079 /* 2080 * Ignore return value here, there's not much we can do since 2081 * the driver changed the interface type internally already. 2082 * The warnings will hopefully make driver authors fix it :-) 2083 */ 2084 ieee80211_check_queues(sdata, type); 2085 2086 ieee80211_setup_sdata(sdata, type); 2087 ieee80211_set_vif_encap_ops(sdata); 2088 2089 err = ieee80211_do_open(&sdata->wdev, false); 2090 WARN(err, "type change: do_open returned %d", err); 2091 2092 ieee80211_wake_vif_queues(local, sdata, 2093 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2094 return ret; 2095 } 2096 2097 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 2098 enum nl80211_iftype type) 2099 { 2100 int ret; 2101 2102 ASSERT_RTNL(); 2103 2104 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 2105 return 0; 2106 2107 if (ieee80211_sdata_running(sdata)) { 2108 ret = ieee80211_runtime_change_iftype(sdata, type); 2109 if (ret) 2110 return ret; 2111 } else { 2112 /* Purge and reset type-dependent state. */ 2113 ieee80211_teardown_sdata(sdata); 2114 ieee80211_setup_sdata(sdata, type); 2115 } 2116 2117 /* reset some values that shouldn't be kept across type changes */ 2118 if (type == NL80211_IFTYPE_STATION) 2119 sdata->u.mgd.use_4addr = false; 2120 2121 return 0; 2122 } 2123 2124 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 2125 u8 *perm_addr, enum nl80211_iftype type) 2126 { 2127 struct ieee80211_sub_if_data *sdata; 2128 u64 mask, start, addr, val, inc; 2129 u8 *m; 2130 u8 tmp_addr[ETH_ALEN]; 2131 int i; 2132 2133 lockdep_assert_wiphy(local->hw.wiphy); 2134 2135 /* default ... something at least */ 2136 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 2137 2138 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 2139 local->hw.wiphy->n_addresses <= 1) 2140 return; 2141 2142 switch (type) { 2143 case NL80211_IFTYPE_MONITOR: 2144 /* doesn't matter */ 2145 break; 2146 case NL80211_IFTYPE_AP_VLAN: 2147 /* match up with an AP interface */ 2148 list_for_each_entry(sdata, &local->interfaces, list) { 2149 if (sdata->vif.type != NL80211_IFTYPE_AP) 2150 continue; 2151 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2152 break; 2153 } 2154 /* keep default if no AP interface present */ 2155 break; 2156 case NL80211_IFTYPE_P2P_CLIENT: 2157 case NL80211_IFTYPE_P2P_GO: 2158 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 2159 list_for_each_entry(sdata, &local->interfaces, list) { 2160 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 2161 continue; 2162 if (!ieee80211_sdata_running(sdata)) 2163 continue; 2164 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2165 return; 2166 } 2167 } 2168 fallthrough; 2169 default: 2170 /* assign a new address if possible -- try n_addresses first */ 2171 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 2172 bool used = false; 2173 2174 list_for_each_entry(sdata, &local->interfaces, list) { 2175 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 2176 sdata->vif.addr)) { 2177 used = true; 2178 break; 2179 } 2180 } 2181 2182 if (!used) { 2183 memcpy(perm_addr, 2184 local->hw.wiphy->addresses[i].addr, 2185 ETH_ALEN); 2186 break; 2187 } 2188 } 2189 2190 /* try mask if available */ 2191 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 2192 break; 2193 2194 m = local->hw.wiphy->addr_mask; 2195 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2198 2199 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 2200 /* not a contiguous mask ... not handled now! */ 2201 pr_info("not contiguous\n"); 2202 break; 2203 } 2204 2205 /* 2206 * Pick address of existing interface in case user changed 2207 * MAC address manually, default to perm_addr. 2208 */ 2209 m = local->hw.wiphy->perm_addr; 2210 list_for_each_entry(sdata, &local->interfaces, list) { 2211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 2212 continue; 2213 m = sdata->vif.addr; 2214 break; 2215 } 2216 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2217 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2218 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2219 2220 inc = 1ULL<<__ffs64(mask); 2221 val = (start & mask); 2222 addr = (start & ~mask) | (val & mask); 2223 do { 2224 bool used = false; 2225 2226 tmp_addr[5] = addr >> 0*8; 2227 tmp_addr[4] = addr >> 1*8; 2228 tmp_addr[3] = addr >> 2*8; 2229 tmp_addr[2] = addr >> 3*8; 2230 tmp_addr[1] = addr >> 4*8; 2231 tmp_addr[0] = addr >> 5*8; 2232 2233 val += inc; 2234 2235 list_for_each_entry(sdata, &local->interfaces, list) { 2236 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 2237 used = true; 2238 break; 2239 } 2240 } 2241 2242 if (!used) { 2243 memcpy(perm_addr, tmp_addr, ETH_ALEN); 2244 break; 2245 } 2246 addr = (start & ~mask) | (val & mask); 2247 } while (addr != start); 2248 2249 break; 2250 } 2251 } 2252 2253 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 2254 unsigned char name_assign_type, 2255 struct wireless_dev **new_wdev, enum nl80211_iftype type, 2256 struct vif_params *params) 2257 { 2258 struct net_device *ndev = NULL; 2259 struct ieee80211_sub_if_data *sdata = NULL; 2260 struct txq_info *txqi; 2261 int ret, i; 2262 2263 ASSERT_RTNL(); 2264 lockdep_assert_wiphy(local->hw.wiphy); 2265 2266 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 2267 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2268 sizeof(void *)); 2269 struct wireless_dev *wdev; 2270 int txq_size = 0; 2271 2272 if (type == NL80211_IFTYPE_NAN) 2273 txq_size = sizeof(struct txq_info) + 2274 local->hw.txq_data_size; 2275 2276 sdata = kzalloc(size + txq_size, GFP_KERNEL); 2277 if (!sdata) 2278 return -ENOMEM; 2279 wdev = &sdata->wdev; 2280 2281 sdata->dev = NULL; 2282 strscpy(sdata->name, name, IFNAMSIZ); 2283 ieee80211_assign_perm_addr(local, wdev->address, type); 2284 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 2285 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2286 2287 /* 2288 * Add a management TXQ for NAN devices which includes frames 2289 * that will only be transmitted during discovery windows (DWs) 2290 */ 2291 if (type == NL80211_IFTYPE_NAN) { 2292 txqi = (struct txq_info *)((unsigned long)sdata + size); 2293 ieee80211_txq_init(sdata, NULL, txqi, 2294 IEEE80211_NUM_TIDS); 2295 } 2296 } else { 2297 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2298 sizeof(void *)); 2299 int txq_size = 0; 2300 2301 if (type != NL80211_IFTYPE_AP_VLAN && 2302 (type != NL80211_IFTYPE_MONITOR || 2303 (params->flags & MONITOR_FLAG_ACTIVE))) 2304 txq_size += sizeof(struct txq_info) + 2305 local->hw.txq_data_size; 2306 2307 ndev = alloc_netdev_mqs(size + txq_size, 2308 name, name_assign_type, 2309 ieee80211_if_setup, 1, 1); 2310 if (!ndev) 2311 return -ENOMEM; 2312 2313 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 2314 2315 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2316 2317 ndev->needed_headroom = local->tx_headroom + 2318 4*6 /* four MAC addresses */ 2319 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 2320 + 6 /* mesh */ 2321 + 8 /* rfc1042/bridge tunnel */ 2322 - ETH_HLEN /* ethernet hard_header_len */ 2323 + IEEE80211_ENCRYPT_HEADROOM; 2324 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 2325 2326 ret = dev_alloc_name(ndev, ndev->name); 2327 if (ret < 0) { 2328 free_netdev(ndev); 2329 return ret; 2330 } 2331 2332 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 2333 if (is_valid_ether_addr(params->macaddr)) 2334 eth_hw_addr_set(ndev, params->macaddr); 2335 else 2336 eth_hw_addr_set(ndev, ndev->perm_addr); 2337 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 2338 2339 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 2340 sdata = netdev_priv(ndev); 2341 ndev->ieee80211_ptr = &sdata->wdev; 2342 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 2343 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2344 memcpy(sdata->name, ndev->name, IFNAMSIZ); 2345 2346 if (txq_size) { 2347 txqi = netdev_priv(ndev) + size; 2348 ieee80211_txq_init(sdata, NULL, txqi, 0); 2349 } 2350 2351 sdata->dev = ndev; 2352 } 2353 2354 /* initialise type-independent data */ 2355 sdata->wdev.wiphy = local->hw.wiphy; 2356 2357 ieee80211_sdata_init(local, sdata); 2358 2359 ieee80211_init_frag_cache(&sdata->frags); 2360 2361 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk, 2362 ieee80211_delayed_tailroom_dec); 2363 2364 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2365 struct ieee80211_supported_band *sband; 2366 sband = local->hw.wiphy->bands[i]; 2367 sdata->rc_rateidx_mask[i] = 2368 sband ? (1 << sband->n_bitrates) - 1 : 0; 2369 if (sband) { 2370 __le16 cap; 2371 u16 *vht_rate_mask; 2372 2373 memcpy(sdata->rc_rateidx_mcs_mask[i], 2374 sband->ht_cap.mcs.rx_mask, 2375 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2376 2377 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 2378 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 2379 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 2380 } else { 2381 memset(sdata->rc_rateidx_mcs_mask[i], 0, 2382 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2383 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 2384 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 2385 } 2386 } 2387 2388 ieee80211_set_default_queues(sdata); 2389 2390 /* setup type-dependent data */ 2391 ieee80211_setup_sdata(sdata, type); 2392 2393 if (ndev) { 2394 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 2395 if (type == NL80211_IFTYPE_STATION) 2396 sdata->u.mgd.use_4addr = params->use_4addr; 2397 2398 ndev->features |= local->hw.netdev_features; 2399 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 2400 ndev->hw_features |= ndev->features & 2401 MAC80211_SUPPORTED_FEATURES_TX; 2402 sdata->vif.netdev_features = local->hw.netdev_features; 2403 2404 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2405 2406 /* MTU range is normally 256 - 2304, where the upper limit is 2407 * the maximum MSDU size. Monitor interfaces send and receive 2408 * MPDU and A-MSDU frames which may be much larger so we do 2409 * not impose an upper limit in that case. 2410 */ 2411 ndev->min_mtu = 256; 2412 if (type == NL80211_IFTYPE_MONITOR) 2413 ndev->max_mtu = 0; 2414 else 2415 ndev->max_mtu = local->hw.max_mtu; 2416 2417 ret = cfg80211_register_netdevice(ndev); 2418 if (ret) { 2419 free_netdev(ndev); 2420 return ret; 2421 } 2422 } 2423 2424 mutex_lock(&local->iflist_mtx); 2425 list_add_tail_rcu(&sdata->list, &local->interfaces); 2426 mutex_unlock(&local->iflist_mtx); 2427 2428 if (new_wdev) 2429 *new_wdev = &sdata->wdev; 2430 2431 return 0; 2432 } 2433 2434 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2435 { 2436 ASSERT_RTNL(); 2437 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2438 2439 mutex_lock(&sdata->local->iflist_mtx); 2440 list_del_rcu(&sdata->list); 2441 mutex_unlock(&sdata->local->iflist_mtx); 2442 2443 if (sdata->vif.txq) 2444 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2445 2446 if (sdata->vif.txq_mgmt) 2447 ieee80211_txq_purge(sdata->local, 2448 to_txq_info(sdata->vif.txq_mgmt)); 2449 2450 synchronize_rcu(); 2451 2452 cfg80211_unregister_wdev(&sdata->wdev); 2453 2454 if (!sdata->dev) { 2455 ieee80211_teardown_sdata(sdata); 2456 kfree(sdata); 2457 } 2458 } 2459 2460 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2461 { 2462 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2463 return; 2464 ieee80211_do_stop(sdata, true); 2465 } 2466 2467 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2468 { 2469 struct ieee80211_sub_if_data *sdata, *tmp; 2470 LIST_HEAD(unreg_list); 2471 2472 ASSERT_RTNL(); 2473 2474 /* Before destroying the interfaces, make sure they're all stopped so 2475 * that the hardware is stopped. Otherwise, the driver might still be 2476 * iterating the interfaces during the shutdown, e.g. from a worker 2477 * or from RX processing or similar, and if it does so (using atomic 2478 * iteration) while we're manipulating the list, the iteration will 2479 * crash. 2480 * 2481 * After this, the hardware should be stopped and the driver should 2482 * have stopped all of its activities, so that we can do RCU-unaware 2483 * manipulations of the interface list below. 2484 */ 2485 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2486 2487 guard(wiphy)(local->hw.wiphy); 2488 2489 WARN(local->open_count, "%s: open count remains %d\n", 2490 wiphy_name(local->hw.wiphy), local->open_count); 2491 2492 mutex_lock(&local->iflist_mtx); 2493 list_splice_init(&local->interfaces, &unreg_list); 2494 mutex_unlock(&local->iflist_mtx); 2495 2496 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) { 2497 bool netdev = sdata->dev; 2498 2499 /* 2500 * Remove IP addresses explicitly, since the notifier will 2501 * skip the callbacks if wdev->registered is false, since 2502 * we can't acquire the wiphy_lock() again there if already 2503 * inside this locked section. 2504 */ 2505 sdata->vif.cfg.arp_addr_cnt = 0; 2506 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2507 sdata->u.mgd.associated) 2508 ieee80211_vif_cfg_change_notify(sdata, 2509 BSS_CHANGED_ARP_FILTER); 2510 2511 list_del(&sdata->list); 2512 cfg80211_unregister_wdev(&sdata->wdev); 2513 2514 if (!netdev) 2515 kfree(sdata); 2516 } 2517 } 2518 2519 static int netdev_notify(struct notifier_block *nb, 2520 unsigned long state, void *ptr) 2521 { 2522 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2523 struct ieee80211_sub_if_data *sdata; 2524 2525 if (state != NETDEV_CHANGENAME) 2526 return NOTIFY_DONE; 2527 2528 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2529 return NOTIFY_DONE; 2530 2531 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2532 return NOTIFY_DONE; 2533 2534 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2535 memcpy(sdata->name, dev->name, IFNAMSIZ); 2536 ieee80211_debugfs_rename_netdev(sdata); 2537 2538 return NOTIFY_OK; 2539 } 2540 2541 static struct notifier_block mac80211_netdev_notifier = { 2542 .notifier_call = netdev_notify, 2543 }; 2544 2545 int ieee80211_iface_init(void) 2546 { 2547 return register_netdevice_notifier(&mac80211_netdev_notifier); 2548 } 2549 2550 void ieee80211_iface_exit(void) 2551 { 2552 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2553 } 2554 2555 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2556 { 2557 if (sdata->vif.type == NL80211_IFTYPE_AP) 2558 atomic_inc(&sdata->u.ap.num_mcast_sta); 2559 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2560 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2561 } 2562 2563 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2564 { 2565 if (sdata->vif.type == NL80211_IFTYPE_AP) 2566 atomic_dec(&sdata->u.ap.num_mcast_sta); 2567 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2568 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2569 } 2570 2571 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata) 2572 { 2573 struct ieee80211_local *local = sdata->local; 2574 2575 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) 2576 return; 2577 2578 ieee80211_stop_vif_queues_norefcount(local, sdata, 2579 IEEE80211_QUEUE_STOP_REASON_CSA); 2580 } 2581 2582 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata) 2583 { 2584 struct ieee80211_local *local = sdata->local; 2585 2586 ieee80211_wake_vif_queues_norefcount(local, sdata, 2587 IEEE80211_QUEUE_STOP_REASON_CSA); 2588 } 2589