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