1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Interface handling 4 * 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (c) 2016 Intel Deutschland GmbH 11 * Copyright (C) 2018-2026 Intel Corporation 12 */ 13 #include <linux/slab.h> 14 #include <linux/kernel.h> 15 #include <linux/if_arp.h> 16 #include <linux/netdevice.h> 17 #include <linux/rtnetlink.h> 18 #include <linux/kcov.h> 19 #include <net/mac80211.h> 20 #include <net/ieee80211_radiotap.h> 21 #include "ieee80211_i.h" 22 #include "sta_info.h" 23 #include "debugfs_netdev.h" 24 #include "mesh.h" 25 #include "led.h" 26 #include "driver-ops.h" 27 #include "wme.h" 28 #include "rate.h" 29 30 /** 31 * DOC: Interface list locking 32 * 33 * The interface list in each struct ieee80211_local is protected 34 * three-fold: 35 * 36 * (1) modifications may only be done under the RTNL *and* wiphy mutex 37 * *and* iflist_mtx 38 * (2) modifications are done in an RCU manner so atomic readers 39 * can traverse the list in RCU-safe blocks. 40 * 41 * As a consequence, reads (traversals) of the list can be protected 42 * by either the RTNL, the wiphy mutex, the iflist_mtx or RCU. 43 */ 44 45 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work); 46 47 bool __ieee80211_recalc_txpower(struct ieee80211_link_data *link) 48 { 49 struct ieee80211_chanctx_conf *chanctx_conf; 50 int power; 51 52 rcu_read_lock(); 53 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 54 if (!chanctx_conf) { 55 rcu_read_unlock(); 56 return false; 57 } 58 59 power = ieee80211_chandef_max_power(&chanctx_conf->def); 60 rcu_read_unlock(); 61 62 if (link->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 63 power = min(power, link->user_power_level); 64 65 if (link->ap_power_level != IEEE80211_UNSET_POWER_LEVEL) 66 power = min(power, link->ap_power_level); 67 68 if (power != link->conf->txpower) { 69 link->conf->txpower = power; 70 return true; 71 } 72 73 return false; 74 } 75 76 void ieee80211_recalc_txpower(struct ieee80211_link_data *link, 77 bool update_bss) 78 { 79 if (__ieee80211_recalc_txpower(link) || 80 (update_bss && ieee80211_sdata_running(link->sdata))) 81 ieee80211_link_info_change_notify(link->sdata, link, 82 BSS_CHANGED_TXPOWER); 83 } 84 85 static u32 __ieee80211_idle_off(struct ieee80211_local *local) 86 { 87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) 88 return 0; 89 90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE; 91 return IEEE80211_CONF_CHANGE_IDLE; 92 } 93 94 static u32 __ieee80211_idle_on(struct ieee80211_local *local) 95 { 96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE) 97 return 0; 98 99 ieee80211_flush_queues(local, NULL, false); 100 101 local->hw.conf.flags |= IEEE80211_CONF_IDLE; 102 return IEEE80211_CONF_CHANGE_IDLE; 103 } 104 105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, 106 bool force_active) 107 { 108 bool working, scanning, active; 109 unsigned int led_trig_start = 0, led_trig_stop = 0; 110 struct ieee80211_sub_if_data *iter; 111 112 lockdep_assert_wiphy(local->hw.wiphy); 113 114 active = force_active || 115 !list_empty(&local->chanctx_list) || 116 local->monitors; 117 118 working = !local->ops->remain_on_channel && 119 !list_empty(&local->roc_list); 120 121 list_for_each_entry(iter, &local->interfaces, list) { 122 if (iter->vif.type == NL80211_IFTYPE_NAN && 123 iter->u.nan.started) { 124 working = true; 125 break; 126 } 127 } 128 129 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 130 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); 131 132 if (working || scanning) 133 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK; 134 else 135 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK; 136 137 if (active) 138 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 139 else 140 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED; 141 142 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); 143 144 if (working || scanning || active) 145 return __ieee80211_idle_off(local); 146 return __ieee80211_idle_on(local); 147 } 148 149 u32 ieee80211_idle_off(struct ieee80211_local *local) 150 { 151 return __ieee80211_recalc_idle(local, true); 152 } 153 154 void ieee80211_recalc_idle(struct ieee80211_local *local) 155 { 156 u32 change = __ieee80211_recalc_idle(local, false); 157 if (change) 158 ieee80211_hw_config(local, -1, change); 159 } 160 161 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, 162 bool check_dup) 163 { 164 struct ieee80211_local *local = sdata->local; 165 struct ieee80211_sub_if_data *iter; 166 u64 new, mask, tmp; 167 u8 *m; 168 int ret = 0; 169 170 lockdep_assert_wiphy(local->hw.wiphy); 171 172 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 173 return 0; 174 175 m = addr; 176 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 179 180 m = local->hw.wiphy->addr_mask; 181 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 182 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 183 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 184 185 if (!check_dup) 186 return ret; 187 188 list_for_each_entry(iter, &local->interfaces, list) { 189 if (iter == sdata) 190 continue; 191 192 if (iter->vif.type == NL80211_IFTYPE_MONITOR && 193 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 194 continue; 195 196 m = iter->vif.addr; 197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 200 201 if ((new & ~mask) != (tmp & ~mask)) { 202 ret = -EINVAL; 203 break; 204 } 205 } 206 207 return ret; 208 } 209 210 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata) 211 { 212 struct ieee80211_roc_work *roc; 213 struct ieee80211_local *local = sdata->local; 214 struct ieee80211_sub_if_data *scan_sdata; 215 int ret = 0; 216 217 lockdep_assert_wiphy(local->hw.wiphy); 218 219 /* To be the most flexible here we want to only limit changing the 220 * address if the specific interface is doing offchannel work or 221 * scanning. 222 */ 223 if (netif_carrier_ok(sdata->dev)) 224 return -EBUSY; 225 226 /* if any stations are set known (so they know this vif too), reject */ 227 if (sta_info_get_by_idx(sdata, 0)) 228 return -EBUSY; 229 230 /* First check no ROC work is happening on this iface */ 231 list_for_each_entry(roc, &local->roc_list, list) { 232 if (roc->sdata != sdata) 233 continue; 234 235 if (roc->started) { 236 ret = -EBUSY; 237 goto unlock; 238 } 239 } 240 241 /* And if this iface is scanning */ 242 if (local->scanning) { 243 scan_sdata = rcu_dereference_protected(local->scan_sdata, 244 lockdep_is_held(&local->hw.wiphy->mtx)); 245 if (sdata == scan_sdata) 246 ret = -EBUSY; 247 } 248 249 /* 250 * More interface types could be added here but changing the 251 * address while powered makes the most sense in client modes. 252 */ 253 switch (sdata->vif.type) { 254 case NL80211_IFTYPE_STATION: 255 case NL80211_IFTYPE_P2P_CLIENT: 256 /* refuse while connecting */ 257 if (sdata->u.mgd.auth_data || sdata->u.mgd.assoc_data) 258 return -EBUSY; 259 break; 260 default: 261 ret = -EOPNOTSUPP; 262 } 263 264 unlock: 265 return ret; 266 } 267 268 static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata, 269 void *addr) 270 { 271 struct ieee80211_local *local = sdata->local; 272 struct sockaddr *sa = addr; 273 bool check_dup = true; 274 bool live = false; 275 int ret; 276 277 if (ieee80211_sdata_running(sdata)) { 278 ret = ieee80211_can_powered_addr_change(sdata); 279 if (ret) 280 return ret; 281 282 live = true; 283 } 284 285 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 286 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 287 check_dup = false; 288 289 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup); 290 if (ret) 291 return ret; 292 293 if (live) 294 drv_remove_interface(local, sdata); 295 ret = eth_mac_addr(sdata->dev, sa); 296 297 if (ret == 0) { 298 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN); 299 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 300 } 301 302 /* Regardless of eth_mac_addr() return we still want to add the 303 * interface back. This should not fail... 304 */ 305 if (live) 306 WARN_ON(drv_add_interface(local, sdata)); 307 308 return ret; 309 } 310 311 static int ieee80211_change_mac(struct net_device *dev, void *addr) 312 { 313 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 314 struct ieee80211_local *local = sdata->local; 315 316 /* 317 * This happens during unregistration if there's a bond device 318 * active (maybe other cases?) and we must get removed from it. 319 * But we really don't care anymore if it's not registered now. 320 */ 321 if (!dev->ieee80211_ptr->registered) 322 return 0; 323 324 guard(wiphy)(local->hw.wiphy); 325 326 return _ieee80211_change_mac(sdata, addr); 327 } 328 329 static inline int identical_mac_addr_allowed(int type1, int type2) 330 { 331 return type1 == NL80211_IFTYPE_MONITOR || 332 type2 == NL80211_IFTYPE_MONITOR || 333 type1 == NL80211_IFTYPE_P2P_DEVICE || 334 type2 == NL80211_IFTYPE_P2P_DEVICE || 335 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || 336 (type1 == NL80211_IFTYPE_AP_VLAN && 337 (type2 == NL80211_IFTYPE_AP || 338 type2 == NL80211_IFTYPE_AP_VLAN)); 339 } 340 341 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, 342 enum nl80211_iftype iftype) 343 { 344 struct ieee80211_local *local = sdata->local; 345 struct ieee80211_sub_if_data *nsdata; 346 347 ASSERT_RTNL(); 348 lockdep_assert_wiphy(local->hw.wiphy); 349 350 /* we hold the RTNL here so can safely walk the list */ 351 list_for_each_entry(nsdata, &local->interfaces, list) { 352 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) { 353 struct ieee80211_link_data *link; 354 355 /* 356 * Only OCB and monitor mode may coexist 357 */ 358 if ((sdata->vif.type == NL80211_IFTYPE_OCB && 359 nsdata->vif.type != NL80211_IFTYPE_MONITOR) || 360 (sdata->vif.type != NL80211_IFTYPE_MONITOR && 361 nsdata->vif.type == NL80211_IFTYPE_OCB)) 362 return -EBUSY; 363 364 /* 365 * A NAN DATA interface is correlated to the NAN 366 * (management) one 367 */ 368 if (iftype == NL80211_IFTYPE_NAN_DATA && 369 nsdata->vif.type == NL80211_IFTYPE_NAN) { 370 if (!nsdata->u.nan.started) 371 return -EINVAL; 372 rcu_assign_pointer(sdata->u.nan_data.nmi, nsdata); 373 } 374 375 /* 376 * Allow only a single IBSS interface to be up at any 377 * time. This is restricted because beacon distribution 378 * cannot work properly if both are in the same IBSS. 379 * 380 * To remove this restriction we'd have to disallow them 381 * from setting the same SSID on different IBSS interfaces 382 * belonging to the same hardware. Then, however, we're 383 * faced with having to adopt two different TSF timers... 384 */ 385 if (iftype == NL80211_IFTYPE_ADHOC && 386 nsdata->vif.type == NL80211_IFTYPE_ADHOC) 387 return -EBUSY; 388 /* 389 * will not add another interface while any channel 390 * switch is active. 391 */ 392 for_each_link_data(nsdata, link) { 393 if (link->conf->csa_active) 394 return -EBUSY; 395 } 396 397 /* 398 * The remaining checks are only performed for interfaces 399 * with the same MAC address. 400 */ 401 if (!ether_addr_equal(sdata->vif.addr, 402 nsdata->vif.addr)) 403 continue; 404 405 /* 406 * check whether it may have the same address 407 */ 408 if (!identical_mac_addr_allowed(iftype, 409 nsdata->vif.type)) 410 return -ENOTUNIQ; 411 412 /* 413 * can only add VLANs to enabled APs 414 */ 415 if (iftype == NL80211_IFTYPE_AP_VLAN && 416 nsdata->vif.type == NL80211_IFTYPE_AP) 417 sdata->bss = &nsdata->u.ap; 418 } 419 } 420 421 return ieee80211_check_combinations(sdata, NULL, 0, 0, -1); 422 } 423 424 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, 425 enum nl80211_iftype iftype) 426 { 427 int n_queues = sdata->local->hw.queues; 428 int i; 429 430 if (iftype == NL80211_IFTYPE_NAN) 431 return 0; 432 433 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 434 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 435 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] == 436 IEEE80211_INVAL_HW_QUEUE)) 437 return -EINVAL; 438 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >= 439 n_queues)) 440 return -EINVAL; 441 } 442 } 443 444 if ((iftype != NL80211_IFTYPE_AP && 445 iftype != NL80211_IFTYPE_P2P_GO && 446 iftype != NL80211_IFTYPE_MESH_POINT) || 447 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) { 448 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 449 return 0; 450 } 451 452 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE)) 453 return -EINVAL; 454 455 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues)) 456 return -EINVAL; 457 458 return 0; 459 } 460 461 static int ieee80211_open(struct net_device *dev) 462 { 463 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 464 int err; 465 466 /* fail early if user set an invalid address */ 467 if (!is_valid_ether_addr(dev->dev_addr)) 468 return -EADDRNOTAVAIL; 469 470 guard(wiphy)(sdata->local->hw.wiphy); 471 472 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type); 473 if (err) 474 return err; 475 476 return ieee80211_do_open(&sdata->wdev, true); 477 } 478 479 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down) 480 { 481 struct ieee80211_local *local = sdata->local; 482 struct ieee80211_sub_if_data *iter; 483 unsigned long flags; 484 struct sk_buff_head freeq; 485 struct sk_buff *skb, *tmp; 486 u32 hw_reconf_flags = 0; 487 int i, flushed; 488 struct ps_data *ps; 489 struct cfg80211_chan_def chandef; 490 bool cancel_scan; 491 struct cfg80211_nan_func *func; 492 493 lockdep_assert_wiphy(local->hw.wiphy); 494 495 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 496 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */ 497 498 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata; 499 if (cancel_scan) 500 ieee80211_scan_cancel(local); 501 502 ieee80211_roc_purge(local, sdata); 503 504 switch (sdata->vif.type) { 505 case NL80211_IFTYPE_STATION: 506 ieee80211_mgd_stop(sdata); 507 break; 508 case NL80211_IFTYPE_ADHOC: 509 ieee80211_ibss_stop(sdata); 510 break; 511 case NL80211_IFTYPE_MONITOR: 512 list_del_rcu(&sdata->u.mntr.list); 513 break; 514 case NL80211_IFTYPE_AP_VLAN: 515 ieee80211_apvlan_link_clear(sdata); 516 break; 517 default: 518 break; 519 } 520 521 /* 522 * Remove all stations associated with this interface. 523 * 524 * This must be done before calling ops->remove_interface() 525 * because otherwise we can later invoke ops->sta_notify() 526 * whenever the STAs are removed, and that invalidates driver 527 * assumptions about always getting a vif pointer that is valid 528 * (because if we remove a STA after ops->remove_interface() 529 * the driver will have removed the vif info already!) 530 * 531 * For AP_VLANs, NAN and NAN_DATA stations may exist since there's 532 * nothing else that would have removed them, but in other modes there 533 * shouldn't be any stations. 534 */ 535 flushed = sta_info_flush(sdata, -1); 536 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 537 sdata->vif.type != NL80211_IFTYPE_NAN && 538 sdata->vif.type != NL80211_IFTYPE_NAN_DATA && flushed > 0); 539 540 /* don't count this interface for allmulti while it is down */ 541 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 542 atomic_dec(&local->iff_allmultis); 543 544 if (sdata->vif.type == NL80211_IFTYPE_AP) { 545 local->fif_pspoll--; 546 local->fif_probe_req--; 547 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 548 local->fif_probe_req--; 549 } 550 551 if (sdata->dev) { 552 netif_addr_lock_bh(sdata->dev); 553 spin_lock_bh(&local->filter_lock); 554 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc, 555 sdata->dev->addr_len); 556 spin_unlock_bh(&local->filter_lock); 557 netif_addr_unlock_bh(sdata->dev); 558 } 559 560 timer_delete_sync(&local->dynamic_ps_timer); 561 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 562 563 WARN(ieee80211_vif_is_mld(&sdata->vif), 564 "destroying interface with valid links 0x%04x\n", 565 sdata->vif.valid_links); 566 567 sdata->vif.bss_conf.csa_active = false; 568 if (sdata->vif.type == NL80211_IFTYPE_STATION) 569 sdata->deflink.u.mgd.csa.waiting_bcn = false; 570 ieee80211_vif_unblock_queues_csa(sdata); 571 572 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work); 573 wiphy_work_cancel(local->hw.wiphy, 574 &sdata->deflink.color_change_finalize_work); 575 wiphy_hrtimer_work_cancel(local->hw.wiphy, 576 &sdata->deflink.dfs_cac_timer_work); 577 578 if (sdata->wdev.links[0].cac_started) { 579 chandef = sdata->vif.bss_conf.chanreq.oper; 580 WARN_ON(local->suspended); 581 ieee80211_link_release_channel(&sdata->deflink); 582 cfg80211_cac_event(sdata->dev, &chandef, 583 NL80211_RADAR_CAC_ABORTED, 584 GFP_KERNEL, 0); 585 } 586 587 if (sdata->vif.type == NL80211_IFTYPE_AP) { 588 WARN_ON(!list_empty(&sdata->u.ap.vlans)); 589 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 590 /* remove all packets in parent bc_buf pointing to this dev */ 591 __skb_queue_head_init(&freeq); 592 ps = &sdata->bss->ps; 593 594 spin_lock_irqsave(&ps->bc_buf.lock, flags); 595 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) { 596 if (skb->dev == sdata->dev) { 597 __skb_unlink(skb, &ps->bc_buf); 598 local->total_ps_buffered--; 599 __skb_queue_tail(&freeq, skb); 600 } 601 } 602 spin_unlock_irqrestore(&ps->bc_buf.lock, flags); 603 604 skb_queue_walk_safe(&freeq, skb, tmp) { 605 __skb_unlink(skb, &freeq); 606 ieee80211_free_txskb(&local->hw, skb); 607 } 608 } 609 610 if (going_down) 611 local->open_count--; 612 613 switch (sdata->vif.type) { 614 case NL80211_IFTYPE_AP_VLAN: 615 list_del(&sdata->u.vlan.list); 616 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL); 617 /* see comment in the default case below */ 618 ieee80211_free_keys(sdata, true); 619 /* increased by AP value on ifup, so reset on ifdown */ 620 sdata->crypto_tx_tailroom_needed_cnt = 0; 621 /* no need to tell driver */ 622 break; 623 case NL80211_IFTYPE_MONITOR: 624 local->monitors--; 625 626 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 627 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 628 629 local->virt_monitors--; 630 if (local->virt_monitors == 0) { 631 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR; 632 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 633 } 634 635 ieee80211_adjust_monitor_flags(sdata, -1); 636 } 637 break; 638 case NL80211_IFTYPE_NAN: 639 /* Check if any open NAN_DATA interfaces */ 640 list_for_each_entry(iter, &local->interfaces, list) { 641 WARN_ON(iter->vif.type == NL80211_IFTYPE_NAN_DATA && 642 ieee80211_sdata_running(iter)); 643 } 644 645 /* clean all the functions */ 646 if (!(local->hw.wiphy->nan_capa.flags & 647 WIPHY_NAN_FLAGS_USERSPACE_DE)) { 648 spin_lock_bh(&sdata->u.nan.de.func_lock); 649 650 idr_for_each_entry(&sdata->u.nan.de.function_inst_ids, 651 func, i) { 652 idr_remove(&sdata->u.nan.de.function_inst_ids, i); 653 cfg80211_free_nan_func(func); 654 } 655 idr_destroy(&sdata->u.nan.de.function_inst_ids); 656 657 spin_unlock_bh(&sdata->u.nan.de.func_lock); 658 } 659 660 /* 661 * Free the remaining keys that might be associated with the 662 * NAN interface, e.g., IGTK and BIGTK used for Tx. 663 */ 664 ieee80211_free_keys(sdata, true); 665 break; 666 case NL80211_IFTYPE_NAN_DATA: 667 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL); 668 fallthrough; 669 default: 670 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 671 /* 672 * When we get here, the interface is marked down. 673 * Free the remaining keys, if there are any 674 * (which can happen in AP mode if userspace sets 675 * keys before the interface is operating) 676 * 677 * Force the key freeing to always synchronize_net() 678 * to wait for the RX path in case it is using this 679 * interface enqueuing frames at this very time on 680 * another CPU. 681 */ 682 ieee80211_free_keys(sdata, true); 683 skb_queue_purge(&sdata->skb_queue); 684 skb_queue_purge(&sdata->status_queue); 685 } 686 687 /* 688 * Since ieee80211_free_txskb() may issue __dev_queue_xmit() 689 * which should be called with interrupts enabled, reclamation 690 * is done in two phases: 691 */ 692 __skb_queue_head_init(&freeq); 693 694 /* unlink from local queues... */ 695 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 696 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 697 skb_queue_walk_safe(&local->pending[i], skb, tmp) { 698 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 699 if (info->control.vif == &sdata->vif) { 700 __skb_unlink(skb, &local->pending[i]); 701 __skb_queue_tail(&freeq, skb); 702 } 703 } 704 } 705 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 706 707 /* ... and perform actual reclamation with interrupts enabled. */ 708 skb_queue_walk_safe(&freeq, skb, tmp) { 709 __skb_unlink(skb, &freeq); 710 ieee80211_free_txskb(&local->hw, skb); 711 } 712 713 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 714 ieee80211_txq_remove_vlan(local, sdata); 715 716 if (sdata->vif.txq) 717 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 718 719 if (sdata->vif.txq_mgmt) 720 ieee80211_txq_purge(sdata->local, 721 to_txq_info(sdata->vif.txq_mgmt)); 722 723 sdata->bss = NULL; 724 725 if (local->open_count == 0) 726 ieee80211_clear_tx_pending(local); 727 728 sdata->vif.bss_conf.beacon_int = 0; 729 730 /* 731 * If the interface goes down while suspended, presumably because 732 * the device was unplugged and that happens before our resume, 733 * then the driver is already unconfigured and the remainder of 734 * this function isn't needed. 735 * XXX: what about WoWLAN? If the device has software state, e.g. 736 * memory allocated, it might expect teardown commands from 737 * mac80211 here? 738 */ 739 if (local->suspended) { 740 WARN_ON(local->wowlan); 741 WARN_ON(rcu_access_pointer(local->monitor_sdata)); 742 return; 743 } 744 745 switch (sdata->vif.type) { 746 case NL80211_IFTYPE_AP_VLAN: 747 break; 748 case NL80211_IFTYPE_MONITOR: 749 if (local->virt_monitors == 0) 750 ieee80211_del_virtual_monitor(local); 751 752 ieee80211_recalc_idle(local); 753 ieee80211_recalc_offload(local); 754 755 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 756 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 757 break; 758 759 ieee80211_link_release_channel(&sdata->deflink); 760 fallthrough; 761 default: 762 if (!going_down) 763 break; 764 drv_remove_interface(local, sdata); 765 766 /* Clear private driver data to prevent reuse */ 767 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size); 768 } 769 770 ieee80211_recalc_ps(local); 771 772 if (cancel_scan) 773 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work); 774 775 if (local->open_count == 0) { 776 ieee80211_stop_device(local, false); 777 778 /* no reconfiguring after stop! */ 779 return; 780 } 781 782 /* do after stop to avoid reconfiguring when we stop anyway */ 783 ieee80211_configure_filter(local); 784 ieee80211_hw_config(local, -1, hw_reconf_flags); 785 786 /* Passing NULL means an interface is picked for configuration */ 787 if (local->virt_monitors == local->open_count) 788 ieee80211_add_virtual_monitor(local, NULL); 789 } 790 791 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata) 792 { 793 struct ieee80211_sub_if_data *tx_sdata; 794 struct ieee80211_bss_conf *link_conf, *tx_bss_conf; 795 struct ieee80211_link_data *tx_link, *link; 796 unsigned int link_id; 797 798 lockdep_assert_wiphy(sdata->local->hw.wiphy); 799 800 /* Check if any of the links of current sdata is an MBSSID. */ 801 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 802 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata); 803 if (!tx_bss_conf) 804 continue; 805 806 tx_sdata = vif_to_sdata(tx_bss_conf->vif); 807 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL); 808 809 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion 810 * while closing tx sdata at the end of outer loop below. 811 */ 812 if (sdata != tx_sdata) { 813 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id], 814 tx_sdata); 815 if (!tx_link) 816 continue; 817 818 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL); 819 } 820 821 /* loop through sdatas to find if any of their links 822 * belong to same MBSSID set as the one getting deleted. 823 */ 824 for_each_sdata_link(tx_sdata->local, link) { 825 struct ieee80211_sub_if_data *link_sdata = link->sdata; 826 827 if (link_sdata == sdata || link_sdata == tx_sdata || 828 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf) 829 continue; 830 831 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL); 832 833 /* Remove all links of matching MLD until dynamic link 834 * removal can be supported. 835 */ 836 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev, 837 GFP_KERNEL); 838 } 839 840 /* If we are not tx sdata, remove links of tx sdata and proceed */ 841 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) 842 cfg80211_stop_iface(tx_sdata->wdev.wiphy, 843 &tx_sdata->wdev, GFP_KERNEL); 844 } 845 } 846 847 static int ieee80211_stop(struct net_device *dev) 848 { 849 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 850 851 /* close dependent VLAN interfaces before locking wiphy */ 852 if (sdata->vif.type == NL80211_IFTYPE_AP) { 853 struct ieee80211_sub_if_data *vlan, *tmpsdata; 854 855 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans, 856 u.vlan.list) 857 dev_close(vlan->dev); 858 } 859 860 guard(wiphy)(sdata->local->hw.wiphy); 861 862 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work); 863 864 /* Close the dependent MBSSID interfaces with wiphy lock as we may be 865 * terminating its partner links too in case of MLD. 866 */ 867 if (sdata->vif.type == NL80211_IFTYPE_AP) 868 ieee80211_stop_mbssid(sdata); 869 870 ieee80211_do_stop(sdata, true); 871 872 return 0; 873 } 874 875 static void ieee80211_set_multicast_list(struct net_device *dev) 876 { 877 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 878 struct ieee80211_local *local = sdata->local; 879 int allmulti, sdata_allmulti; 880 881 allmulti = !!(dev->flags & IFF_ALLMULTI); 882 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); 883 884 if (allmulti != sdata_allmulti) { 885 if (dev->flags & IFF_ALLMULTI) 886 atomic_inc(&local->iff_allmultis); 887 else 888 atomic_dec(&local->iff_allmultis); 889 sdata->flags ^= IEEE80211_SDATA_ALLMULTI; 890 } 891 892 spin_lock_bh(&local->filter_lock); 893 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len); 894 spin_unlock_bh(&local->filter_lock); 895 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter); 896 } 897 898 /* 899 * Called when the netdev is removed or, by the code below, before 900 * the interface type changes. 901 */ 902 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata) 903 { 904 if (WARN_ON(!list_empty(&sdata->work.entry))) 905 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work); 906 907 /* free extra data */ 908 ieee80211_free_keys(sdata, false); 909 910 ieee80211_debugfs_remove_netdev(sdata); 911 912 ieee80211_destroy_frag_cache(&sdata->frags); 913 914 if (ieee80211_vif_is_mesh(&sdata->vif)) 915 ieee80211_mesh_teardown_sdata(sdata); 916 917 ieee80211_vif_clear_links(sdata); 918 ieee80211_link_stop(&sdata->deflink); 919 920 if (sdata->vif.type == NL80211_IFTYPE_NAN) { 921 struct ieee80211_nan_sched_cfg *nan_sched = 922 &sdata->vif.cfg.nan_sched; 923 924 for (int i = 0; i < ARRAY_SIZE(nan_sched->channels); i++) 925 WARN_ON(nan_sched->channels[i].chanreq.oper.chan); 926 } 927 } 928 929 /* 930 * The netdev can be unregistered without mac80211 doing it, e.g. by the netdev 931 * core when cfg80211 couldn't move it out of a network namespace that's being 932 * destroyed. Drop it from the interface list either way. 933 */ 934 static void ieee80211_unlist_sdata(struct ieee80211_sub_if_data *sdata) 935 { 936 struct ieee80211_local *local = sdata->local; 937 struct ieee80211_sub_if_data *iter; 938 939 ASSERT_RTNL(); 940 941 list_for_each_entry(iter, &local->interfaces, list) { 942 if (iter != sdata) 943 continue; 944 guard(mutex)(&local->iflist_mtx); 945 list_del_rcu(&sdata->list); 946 return; 947 } 948 } 949 950 static void ieee80211_uninit(struct net_device *dev) 951 { 952 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 953 954 ieee80211_unlist_sdata(sdata); 955 ieee80211_teardown_sdata(sdata); 956 } 957 958 static int ieee80211_netdev_setup_tc(struct net_device *dev, 959 enum tc_setup_type type, void *type_data) 960 { 961 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 962 struct ieee80211_local *local = sdata->local; 963 964 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 965 return -EOPNOTSUPP; 966 967 return drv_net_setup_tc(local, sdata, dev, type, type_data); 968 } 969 970 static const struct net_device_ops ieee80211_dataif_ops = { 971 .ndo_open = ieee80211_open, 972 .ndo_stop = ieee80211_stop, 973 .ndo_uninit = ieee80211_uninit, 974 .ndo_start_xmit = ieee80211_subif_start_xmit, 975 .ndo_set_rx_mode = ieee80211_set_multicast_list, 976 .ndo_set_mac_address = ieee80211_change_mac, 977 .ndo_setup_tc = ieee80211_netdev_setup_tc, 978 }; 979 980 static u16 ieee80211_monitor_select_queue(struct net_device *dev, 981 struct sk_buff *skb, 982 struct net_device *sb_dev) 983 { 984 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 985 struct ieee80211_local *local = sdata->local; 986 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 987 struct ieee80211_hdr *hdr; 988 int len_rthdr; 989 990 if (local->hw.queues < IEEE80211_NUM_ACS) 991 return 0; 992 993 /* reset flags and info before parsing radiotap header */ 994 memset(info, 0, sizeof(*info)); 995 996 if (!ieee80211_parse_tx_radiotap(skb, dev, NULL)) 997 return 0; /* doesn't matter, frame will be dropped */ 998 999 len_rthdr = ieee80211_get_radiotap_len(skb->data); 1000 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); 1001 if (skb_headlen(skb) < len_rthdr + 2 || 1002 skb_headlen(skb) < len_rthdr + ieee80211_hdrlen(hdr->frame_control)) 1003 return 0; /* doesn't matter, frame will be dropped */ 1004 1005 return ieee80211_select_queue_80211(sdata, skb, hdr); 1006 } 1007 1008 static const struct net_device_ops ieee80211_monitorif_ops = { 1009 .ndo_open = ieee80211_open, 1010 .ndo_stop = ieee80211_stop, 1011 .ndo_uninit = ieee80211_uninit, 1012 .ndo_start_xmit = ieee80211_monitor_start_xmit, 1013 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1014 .ndo_set_mac_address = ieee80211_change_mac, 1015 .ndo_select_queue = ieee80211_monitor_select_queue, 1016 }; 1017 1018 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx, 1019 struct net_device_path *path) 1020 { 1021 struct ieee80211_sub_if_data *sdata; 1022 struct ieee80211_local *local; 1023 struct sta_info *sta; 1024 int ret = -ENOENT; 1025 1026 if (ctx->ieee80211) { 1027 path->type = DEV_PATH_IEEE80211; 1028 path->dev = ctx->dev; 1029 ctx->dev = NULL; 1030 return 0; 1031 } 1032 1033 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev); 1034 local = sdata->local; 1035 1036 if (!local->ops->net_fill_forward_path) 1037 return -EOPNOTSUPP; 1038 1039 rcu_read_lock(); 1040 switch (sdata->vif.type) { 1041 case NL80211_IFTYPE_AP_VLAN: 1042 sta = rcu_dereference(sdata->u.vlan.sta); 1043 if (sta) 1044 break; 1045 if (sdata->wdev.use_4addr) 1046 goto out; 1047 if (is_multicast_ether_addr(ctx->daddr)) 1048 goto out; 1049 sta = sta_info_get_bss(sdata, ctx->daddr); 1050 break; 1051 case NL80211_IFTYPE_AP: 1052 if (is_multicast_ether_addr(ctx->daddr)) 1053 goto out; 1054 sta = sta_info_get(sdata, ctx->daddr); 1055 break; 1056 case NL80211_IFTYPE_STATION: 1057 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { 1058 sta = sta_info_get(sdata, ctx->daddr); 1059 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { 1060 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) 1061 goto out; 1062 1063 break; 1064 } 1065 } 1066 1067 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid); 1068 break; 1069 default: 1070 goto out; 1071 } 1072 1073 if (!sta) 1074 goto out; 1075 1076 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path); 1077 out: 1078 rcu_read_unlock(); 1079 1080 return ret; 1081 } 1082 1083 static const struct net_device_ops ieee80211_dataif_8023_ops = { 1084 .ndo_open = ieee80211_open, 1085 .ndo_stop = ieee80211_stop, 1086 .ndo_uninit = ieee80211_uninit, 1087 .ndo_start_xmit = ieee80211_subif_start_xmit_8023, 1088 .ndo_set_rx_mode = ieee80211_set_multicast_list, 1089 .ndo_set_mac_address = ieee80211_change_mac, 1090 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path, 1091 .ndo_setup_tc = ieee80211_netdev_setup_tc, 1092 }; 1093 1094 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype) 1095 { 1096 switch (iftype) { 1097 /* P2P GO and client are mapped to AP/STATION types */ 1098 case NL80211_IFTYPE_AP: 1099 case NL80211_IFTYPE_STATION: 1100 return true; 1101 default: 1102 return false; 1103 } 1104 } 1105 1106 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata) 1107 { 1108 struct ieee80211_local *local = sdata->local; 1109 u32 flags; 1110 1111 flags = sdata->vif.offload_flags; 1112 1113 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) && 1114 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1115 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED; 1116 1117 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) && 1118 local->hw.wiphy->frag_threshold != (u32)-1) 1119 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1120 1121 if (local->virt_monitors) 1122 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1123 } else { 1124 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED; 1125 } 1126 1127 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) && 1128 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) { 1129 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED; 1130 1131 if (local->virt_monitors && 1132 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP)) 1133 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1134 } else { 1135 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED; 1136 } 1137 1138 if (sdata->vif.offload_flags == flags) 1139 return false; 1140 1141 sdata->vif.offload_flags = flags; 1142 ieee80211_check_fast_rx_iface(sdata); 1143 return true; 1144 } 1145 1146 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata) 1147 { 1148 struct ieee80211_local *local = sdata->local; 1149 struct ieee80211_sub_if_data *bss = sdata; 1150 bool enabled; 1151 1152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1153 if (!sdata->bss) 1154 return; 1155 1156 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); 1157 } 1158 1159 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) || 1160 !ieee80211_iftype_supports_hdr_offload(bss->vif.type)) 1161 return; 1162 1163 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED; 1164 if (sdata->wdev.use_4addr && 1165 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR)) 1166 enabled = false; 1167 1168 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops : 1169 &ieee80211_dataif_ops; 1170 } 1171 1172 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata) 1173 { 1174 struct ieee80211_local *local = sdata->local; 1175 struct ieee80211_sub_if_data *vsdata; 1176 1177 if (ieee80211_set_sdata_offload_flags(sdata)) { 1178 drv_update_vif_offload(local, sdata); 1179 ieee80211_set_vif_encap_ops(sdata); 1180 } 1181 1182 list_for_each_entry(vsdata, &local->interfaces, list) { 1183 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN || 1184 vsdata->bss != &sdata->u.ap) 1185 continue; 1186 1187 ieee80211_set_vif_encap_ops(vsdata); 1188 } 1189 } 1190 1191 void ieee80211_recalc_offload(struct ieee80211_local *local) 1192 { 1193 struct ieee80211_sub_if_data *sdata; 1194 1195 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD)) 1196 return; 1197 1198 lockdep_assert_wiphy(local->hw.wiphy); 1199 1200 list_for_each_entry(sdata, &local->interfaces, list) { 1201 if (!ieee80211_sdata_running(sdata)) 1202 continue; 1203 1204 ieee80211_recalc_sdata_offload(sdata); 1205 } 1206 } 1207 1208 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata, 1209 const int offset) 1210 { 1211 struct ieee80211_local *local = sdata->local; 1212 u32 flags = sdata->u.mntr.flags; 1213 1214 #define ADJUST(_f, _s) do { \ 1215 if (flags & MONITOR_FLAG_##_f) \ 1216 local->fif_##_s += offset; \ 1217 } while (0) 1218 1219 ADJUST(FCSFAIL, fcsfail); 1220 ADJUST(PLCPFAIL, plcpfail); 1221 ADJUST(CONTROL, control); 1222 ADJUST(CONTROL, pspoll); 1223 ADJUST(OTHER_BSS, other_bss); 1224 if (!(flags & MONITOR_FLAG_SKIP_TX)) 1225 local->tx_mntrs += offset; 1226 1227 #undef ADJUST 1228 } 1229 1230 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) 1231 { 1232 struct ieee80211_local *local = sdata->local; 1233 int i; 1234 1235 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 1236 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 1237 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE; 1238 else if (local->hw.queues >= IEEE80211_NUM_ACS) 1239 sdata->vif.hw_queue[i] = i; 1240 else 1241 sdata->vif.hw_queue[i] = 0; 1242 } 1243 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE; 1244 } 1245 1246 static void ieee80211_sdata_init(struct ieee80211_local *local, 1247 struct ieee80211_sub_if_data *sdata) 1248 { 1249 sdata->local = local; 1250 1251 INIT_LIST_HEAD(&sdata->key_list); 1252 1253 /* 1254 * Initialize the default link, so we can use link_id 0 for non-MLD, 1255 * and that continues to work for non-MLD-aware drivers that use just 1256 * vif.bss_conf instead of vif.link_conf. 1257 * 1258 * Note that we never change this, so if link ID 0 isn't used in an 1259 * MLD connection, we get a separate allocation for it. 1260 */ 1261 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf); 1262 } 1263 1264 int ieee80211_add_virtual_monitor(struct ieee80211_local *local, 1265 struct ieee80211_sub_if_data *creator_sdata) 1266 { 1267 struct ieee80211_sub_if_data *sdata; 1268 int ret; 1269 1270 ASSERT_RTNL(); 1271 lockdep_assert_wiphy(local->hw.wiphy); 1272 1273 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1274 return 0; 1275 1276 /* Already have a monitor set up, configure it */ 1277 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 1278 if (sdata) 1279 goto configure_monitor; 1280 1281 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); 1282 if (!sdata) 1283 return -ENOMEM; 1284 1285 /* set up data */ 1286 sdata->vif.type = NL80211_IFTYPE_MONITOR; 1287 snprintf(sdata->name, IFNAMSIZ, "%s-monitor", 1288 wiphy_name(local->hw.wiphy)); 1289 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; 1290 sdata->wdev.wiphy = local->hw.wiphy; 1291 1292 ieee80211_sdata_init(local, sdata); 1293 1294 ieee80211_set_default_queues(sdata); 1295 1296 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) { 1297 ret = drv_add_interface(local, sdata); 1298 if (WARN_ON(ret)) { 1299 /* ok .. stupid driver, it asked for this! */ 1300 kfree(sdata); 1301 return ret; 1302 } 1303 } 1304 1305 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR); 1306 if (ret) { 1307 kfree(sdata); 1308 return ret; 1309 } 1310 1311 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1312 1313 mutex_lock(&local->iflist_mtx); 1314 rcu_assign_pointer(local->monitor_sdata, sdata); 1315 mutex_unlock(&local->iflist_mtx); 1316 1317 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq, 1318 IEEE80211_CHANCTX_EXCLUSIVE); 1319 if (ret) { 1320 mutex_lock(&local->iflist_mtx); 1321 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1322 mutex_unlock(&local->iflist_mtx); 1323 synchronize_net(); 1324 drv_remove_interface(local, sdata); 1325 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1326 kfree(sdata); 1327 return ret; 1328 } 1329 1330 skb_queue_head_init(&sdata->skb_queue); 1331 skb_queue_head_init(&sdata->status_queue); 1332 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1333 1334 configure_monitor: 1335 /* Copy in the MU-MIMO configuration if set */ 1336 if (!creator_sdata) { 1337 struct ieee80211_sub_if_data *other; 1338 1339 list_for_each_entry_rcu(other, &local->mon_list, u.mntr.list) { 1340 if (!other->vif.bss_conf.mu_mimo_owner) 1341 continue; 1342 1343 creator_sdata = other; 1344 break; 1345 } 1346 } 1347 1348 if (creator_sdata && creator_sdata->vif.bss_conf.mu_mimo_owner) { 1349 sdata->vif.bss_conf.mu_mimo_owner = true; 1350 memcpy(&sdata->vif.bss_conf.mu_group, 1351 &creator_sdata->vif.bss_conf.mu_group, 1352 sizeof(sdata->vif.bss_conf.mu_group)); 1353 memcpy(&sdata->u.mntr.mu_follow_addr, 1354 creator_sdata->u.mntr.mu_follow_addr, ETH_ALEN); 1355 1356 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1357 BSS_CHANGED_MU_GROUPS); 1358 } 1359 1360 return 0; 1361 } 1362 1363 void ieee80211_del_virtual_monitor(struct ieee80211_local *local) 1364 { 1365 struct ieee80211_sub_if_data *sdata; 1366 1367 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 1368 return; 1369 1370 ASSERT_RTNL(); 1371 lockdep_assert_wiphy(local->hw.wiphy); 1372 1373 mutex_lock(&local->iflist_mtx); 1374 1375 sdata = rcu_dereference_protected(local->monitor_sdata, 1376 lockdep_is_held(&local->iflist_mtx)); 1377 if (!sdata) { 1378 mutex_unlock(&local->iflist_mtx); 1379 return; 1380 } 1381 1382 clear_bit(SDATA_STATE_RUNNING, &sdata->state); 1383 ieee80211_link_release_channel(&sdata->deflink); 1384 1385 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 1386 drv_remove_interface(local, sdata); 1387 1388 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1389 mutex_unlock(&local->iflist_mtx); 1390 1391 synchronize_net(); 1392 1393 kfree(sdata); 1394 } 1395 1396 /* 1397 * NOTE: Be very careful when changing this function, it must NOT return 1398 * an error on interface type changes that have been pre-checked, so most 1399 * checks should be in ieee80211_check_concurrent_iface. 1400 */ 1401 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) 1402 { 1403 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 1404 struct net_device *dev = wdev->netdev; 1405 struct ieee80211_local *local = sdata->local; 1406 u64 changed = 0; 1407 int res; 1408 u32 hw_reconf_flags = 0; 1409 1410 lockdep_assert_wiphy(local->hw.wiphy); 1411 1412 switch (sdata->vif.type) { 1413 case NL80211_IFTYPE_AP_VLAN: { 1414 struct ieee80211_sub_if_data *master; 1415 1416 if (!sdata->bss) 1417 return -ENOLINK; 1418 1419 list_add(&sdata->u.vlan.list, &sdata->bss->vlans); 1420 1421 master = container_of(sdata->bss, 1422 struct ieee80211_sub_if_data, u.ap); 1423 sdata->control_port_protocol = 1424 master->control_port_protocol; 1425 sdata->control_port_no_encrypt = 1426 master->control_port_no_encrypt; 1427 sdata->control_port_over_nl80211 = 1428 master->control_port_over_nl80211; 1429 sdata->control_port_no_preauth = 1430 master->control_port_no_preauth; 1431 sdata->vif.cab_queue = master->vif.cab_queue; 1432 memcpy(sdata->vif.hw_queue, master->vif.hw_queue, 1433 sizeof(sdata->vif.hw_queue)); 1434 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq; 1435 1436 sdata->crypto_tx_tailroom_needed_cnt += 1437 master->crypto_tx_tailroom_needed_cnt; 1438 1439 ieee80211_apvlan_link_setup(sdata); 1440 1441 break; 1442 } 1443 case NL80211_IFTYPE_AP: 1444 case NL80211_IFTYPE_MESH_POINT: 1445 case NL80211_IFTYPE_STATION: 1446 case NL80211_IFTYPE_MONITOR: 1447 case NL80211_IFTYPE_ADHOC: 1448 case NL80211_IFTYPE_P2P_DEVICE: 1449 case NL80211_IFTYPE_OCB: 1450 case NL80211_IFTYPE_NAN: 1451 case NL80211_IFTYPE_PD: 1452 /* no special treatment */ 1453 break; 1454 case NL80211_IFTYPE_NAN_DATA: 1455 if (WARN_ON(!rcu_access_pointer(sdata->u.nan_data.nmi))) 1456 return -ENOLINK; 1457 break; 1458 case NL80211_IFTYPE_UNSPECIFIED: 1459 case NUM_NL80211_IFTYPES: 1460 case NL80211_IFTYPE_P2P_CLIENT: 1461 case NL80211_IFTYPE_P2P_GO: 1462 case NL80211_IFTYPE_WDS: 1463 /* cannot happen */ 1464 WARN_ON(1); 1465 break; 1466 } 1467 1468 if (local->open_count == 0) { 1469 /* here we can consider everything in good order (again) */ 1470 local->reconfig_failure = false; 1471 1472 res = drv_start(local); 1473 if (res) { 1474 /* 1475 * no need to worry about AP_VLAN/NAN_DATA cleanup since 1476 * in that case we can't have open_count == 0 1477 */ 1478 return res; 1479 } 1480 ieee80211_led_radio(local, true); 1481 ieee80211_mod_tpt_led_trig(local, 1482 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1483 } 1484 1485 /* 1486 * Copy the hopefully now-present MAC address to 1487 * this interface, if it has the special null one. 1488 */ 1489 if (dev && is_zero_ether_addr(dev->dev_addr)) { 1490 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr); 1491 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN); 1492 1493 if (!is_valid_ether_addr(dev->dev_addr)) { 1494 res = -EADDRNOTAVAIL; 1495 goto err_stop; 1496 } 1497 } 1498 1499 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR || 1500 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE); 1501 switch (sdata->vif.type) { 1502 case NL80211_IFTYPE_AP_VLAN: 1503 /* no need to tell driver, but set carrier and chanctx */ 1504 if (sdata->bss->active) { 1505 struct ieee80211_link_data *link; 1506 1507 for_each_link_data(sdata, link) { 1508 ieee80211_link_vlan_copy_chanctx(link); 1509 } 1510 1511 netif_carrier_on(dev); 1512 ieee80211_set_vif_encap_ops(sdata); 1513 } else { 1514 netif_carrier_off(dev); 1515 } 1516 break; 1517 case NL80211_IFTYPE_MONITOR: 1518 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) || 1519 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) { 1520 res = drv_add_interface(local, sdata); 1521 if (res) 1522 goto err_stop; 1523 } else { 1524 /* add/configure if there is no non-monitor interface */ 1525 if (local->virt_monitors == local->open_count) { 1526 res = ieee80211_add_virtual_monitor(local, sdata); 1527 if (res) 1528 goto err_stop; 1529 } 1530 1531 local->virt_monitors++; 1532 1533 /* must be before the call to ieee80211_configure_filter */ 1534 if (local->virt_monitors == 1) { 1535 local->hw.conf.flags |= IEEE80211_CONF_MONITOR; 1536 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR; 1537 } 1538 } 1539 1540 local->monitors++; 1541 1542 ieee80211_adjust_monitor_flags(sdata, 1); 1543 ieee80211_configure_filter(local); 1544 ieee80211_recalc_offload(local); 1545 ieee80211_recalc_idle(local); 1546 1547 netif_carrier_on(dev); 1548 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list); 1549 break; 1550 case NL80211_IFTYPE_AP: 1551 sdata->bss = &sdata->u.ap; 1552 fallthrough; 1553 default: 1554 if (coming_up) { 1555 ieee80211_del_virtual_monitor(local); 1556 ieee80211_set_sdata_offload_flags(sdata); 1557 1558 res = drv_add_interface(local, sdata); 1559 if (res) 1560 goto err_stop; 1561 1562 ieee80211_set_vif_encap_ops(sdata); 1563 res = ieee80211_check_queues(sdata, 1564 ieee80211_vif_type_p2p(&sdata->vif)); 1565 if (res) 1566 goto err_del_interface; 1567 } 1568 1569 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1570 local->fif_pspoll++; 1571 local->fif_probe_req++; 1572 1573 ieee80211_configure_filter(local); 1574 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 1575 local->fif_probe_req++; 1576 } 1577 1578 if (sdata->vif.probe_req_reg) 1579 drv_config_iface_filter(local, sdata, 1580 FIF_PROBE_REQ, 1581 FIF_PROBE_REQ); 1582 1583 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1584 sdata->vif.type != NL80211_IFTYPE_NAN && 1585 sdata->vif.type != NL80211_IFTYPE_PD) 1586 changed |= ieee80211_reset_erp_info(sdata); 1587 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1588 changed); 1589 1590 switch (sdata->vif.type) { 1591 case NL80211_IFTYPE_STATION: 1592 case NL80211_IFTYPE_ADHOC: 1593 case NL80211_IFTYPE_AP: 1594 case NL80211_IFTYPE_MESH_POINT: 1595 case NL80211_IFTYPE_OCB: 1596 case NL80211_IFTYPE_NAN_DATA: 1597 netif_carrier_off(dev); 1598 break; 1599 case NL80211_IFTYPE_P2P_DEVICE: 1600 case NL80211_IFTYPE_NAN: 1601 case NL80211_IFTYPE_PD: 1602 break; 1603 default: 1604 /* not reached */ 1605 WARN_ON(1); 1606 } 1607 1608 /* 1609 * Set default queue parameters so drivers don't 1610 * need to initialise the hardware if the hardware 1611 * doesn't start up with sane defaults. 1612 * Enable QoS for anything but station interfaces. 1613 */ 1614 ieee80211_set_wmm_default(&sdata->deflink, true, 1615 sdata->vif.type != NL80211_IFTYPE_STATION); 1616 } 1617 1618 /* 1619 * set_multicast_list will be invoked by the networking core 1620 * which will check whether any increments here were done in 1621 * error and sync them down to the hardware as filter flags. 1622 */ 1623 if (sdata->flags & IEEE80211_SDATA_ALLMULTI) 1624 atomic_inc(&local->iff_allmultis); 1625 1626 if (coming_up) 1627 local->open_count++; 1628 1629 if (local->open_count == 1) 1630 ieee80211_hw_conf_init(local); 1631 else if (hw_reconf_flags) 1632 ieee80211_hw_config(local, -1, hw_reconf_flags); 1633 1634 ieee80211_recalc_ps(local); 1635 1636 set_bit(SDATA_STATE_RUNNING, &sdata->state); 1637 1638 return 0; 1639 err_del_interface: 1640 drv_remove_interface(local, sdata); 1641 err_stop: 1642 if (!local->open_count) { 1643 ieee80211_led_radio(local, false); 1644 ieee80211_mod_tpt_led_trig(local, 0, 1645 IEEE80211_TPT_LEDTRIG_FL_RADIO); 1646 drv_stop(local, false); 1647 } 1648 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 1649 RCU_INIT_POINTER(sdata->u.nan_data.nmi, NULL); 1650 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1651 list_del(&sdata->u.vlan.list); 1652 /* Might not be initialized yet, but it is harmless */ 1653 sdata->bss = NULL; 1654 return res; 1655 } 1656 1657 static void ieee80211_if_setup(struct net_device *dev) 1658 { 1659 ether_setup(dev); 1660 dev->priv_flags &= ~IFF_TX_SKB_SHARING; 1661 dev->priv_flags |= IFF_NO_QUEUE; 1662 dev->netdev_ops = &ieee80211_dataif_ops; 1663 dev->needs_free_netdev = true; 1664 } 1665 1666 static void ieee80211_iface_process_skb(struct ieee80211_local *local, 1667 struct ieee80211_sub_if_data *sdata, 1668 struct sk_buff *skb) 1669 { 1670 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1671 1672 lockdep_assert_wiphy(local->hw.wiphy); 1673 1674 if (ieee80211_is_action(mgmt->frame_control) && 1675 mgmt->u.action.category == WLAN_CATEGORY_BACK) { 1676 struct sta_info *sta; 1677 int len = skb->len; 1678 1679 sta = sta_info_get_bss(sdata, mgmt->sa); 1680 if (sta) { 1681 switch (mgmt->u.action.action_code) { 1682 case WLAN_ACTION_ADDBA_REQ: 1683 case WLAN_ACTION_NDP_ADDBA_REQ: 1684 ieee80211_process_addba_request(local, sta, 1685 mgmt, len); 1686 break; 1687 case WLAN_ACTION_ADDBA_RESP: 1688 case WLAN_ACTION_NDP_ADDBA_RESP: 1689 ieee80211_process_addba_resp(local, sta, 1690 mgmt, len); 1691 break; 1692 case WLAN_ACTION_DELBA: 1693 case WLAN_ACTION_NDP_DELBA: 1694 ieee80211_process_delba(sdata, sta, 1695 mgmt, len); 1696 break; 1697 default: 1698 WARN_ON(1); 1699 break; 1700 } 1701 } 1702 } else if (ieee80211_is_action(mgmt->frame_control) && 1703 mgmt->u.action.category == WLAN_CATEGORY_HT) { 1704 switch (mgmt->u.action.action_code) { 1705 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { 1706 u8 chanwidth = mgmt->u.action.ht_notify_cw.chanwidth; 1707 struct ieee80211_rx_status *status; 1708 struct link_sta_info *link_sta; 1709 struct sta_info *sta; 1710 1711 sta = sta_info_get_bss(sdata, mgmt->sa); 1712 if (!sta) 1713 break; 1714 1715 status = IEEE80211_SKB_RXCB(skb); 1716 if (!status->link_valid) 1717 link_sta = &sta->deflink; 1718 else 1719 link_sta = rcu_dereference_protected(sta->link[status->link_id], 1720 lockdep_is_held(&local->hw.wiphy->mtx)); 1721 if (link_sta) 1722 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta, 1723 link_sta, chanwidth, 1724 status->band); 1725 break; 1726 } 1727 default: 1728 WARN_ON(1); 1729 break; 1730 } 1731 } else if (ieee80211_is_action(mgmt->frame_control) && 1732 mgmt->u.action.category == WLAN_CATEGORY_VHT) { 1733 switch (mgmt->u.action.action_code) { 1734 case WLAN_VHT_ACTION_OPMODE_NOTIF: { 1735 struct ieee80211_rx_status *status; 1736 enum nl80211_band band; 1737 struct sta_info *sta; 1738 u8 opmode; 1739 1740 status = IEEE80211_SKB_RXCB(skb); 1741 band = status->band; 1742 opmode = mgmt->u.action.vht_opmode_notif.operating_mode; 1743 1744 sta = sta_info_get_bss(sdata, mgmt->sa); 1745 1746 if (sta) 1747 ieee80211_vht_handle_opmode(sdata, 1748 &sta->deflink, 1749 opmode, band); 1750 1751 break; 1752 } 1753 case WLAN_VHT_ACTION_GROUPID_MGMT: 1754 ieee80211_process_mu_groups(sdata, &sdata->deflink, 1755 mgmt); 1756 break; 1757 default: 1758 WARN_ON(1); 1759 break; 1760 } 1761 } else if (ieee80211_is_action(mgmt->frame_control) && 1762 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1763 switch (mgmt->u.action.action_code) { 1764 case WLAN_S1G_TWT_TEARDOWN: 1765 case WLAN_S1G_TWT_SETUP: 1766 ieee80211_s1g_rx_twt_action(sdata, skb); 1767 break; 1768 default: 1769 break; 1770 } 1771 } else if (ieee80211_is_data_qos(mgmt->frame_control)) { 1772 struct ieee80211_hdr *hdr = (void *)mgmt; 1773 struct sta_info *sta; 1774 1775 /* 1776 * So the frame isn't mgmt, but frame_control 1777 * is at the right place anyway, of course, so 1778 * the if statement is correct. 1779 * 1780 * Warn if we have other data frame types here, 1781 * they must not get here. 1782 */ 1783 WARN_ON(hdr->frame_control & 1784 cpu_to_le16(IEEE80211_STYPE_NULLFUNC)); 1785 WARN_ON(!(hdr->seq_ctrl & 1786 cpu_to_le16(IEEE80211_SCTL_FRAG))); 1787 /* 1788 * This was a fragment of a frame, received while 1789 * a block-ack session was active. That cannot be 1790 * right, so terminate the session. 1791 */ 1792 sta = sta_info_get_bss(sdata, mgmt->sa); 1793 if (sta) { 1794 u16 tid = ieee80211_get_tid(hdr); 1795 1796 __ieee80211_stop_rx_ba_session( 1797 sta, tid, WLAN_BACK_RECIPIENT, 1798 WLAN_REASON_QSTA_REQUIRE_SETUP, 1799 true); 1800 } 1801 } else switch (sdata->vif.type) { 1802 case NL80211_IFTYPE_AP: 1803 ieee80211_ap_rx_queued_frame(sdata, skb); 1804 break; 1805 case NL80211_IFTYPE_STATION: 1806 ieee80211_sta_rx_queued_frame(sdata, skb); 1807 break; 1808 case NL80211_IFTYPE_ADHOC: 1809 ieee80211_ibss_rx_queued_mgmt(sdata, skb); 1810 break; 1811 case NL80211_IFTYPE_MESH_POINT: 1812 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1813 break; 1814 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 1815 break; 1816 default: 1817 WARN(1, "frame for unexpected interface type"); 1818 break; 1819 } 1820 } 1821 1822 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata, 1823 struct sk_buff *skb) 1824 { 1825 struct ieee80211_mgmt *mgmt = (void *)skb->data; 1826 1827 if (ieee80211_is_action(mgmt->frame_control) && 1828 mgmt->u.action.category == WLAN_CATEGORY_S1G) { 1829 switch (mgmt->u.action.action_code) { 1830 case WLAN_S1G_TWT_TEARDOWN: 1831 case WLAN_S1G_TWT_SETUP: 1832 ieee80211_s1g_status_twt_action(sdata, skb); 1833 break; 1834 default: 1835 break; 1836 } 1837 } 1838 } 1839 1840 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work) 1841 { 1842 struct ieee80211_sub_if_data *sdata = 1843 container_of(work, struct ieee80211_sub_if_data, work); 1844 struct ieee80211_local *local = sdata->local; 1845 struct sk_buff *skb; 1846 1847 if (!ieee80211_sdata_running(sdata)) 1848 return; 1849 1850 if (test_bit(SCAN_SW_SCANNING, &local->scanning)) 1851 return; 1852 1853 if (!ieee80211_can_run_worker(local)) 1854 return; 1855 1856 /* first process frames */ 1857 while ((skb = skb_dequeue(&sdata->skb_queue))) { 1858 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1859 1860 if (skb->protocol == cpu_to_be16(ETH_P_TDLS)) 1861 ieee80211_process_tdls_channel_switch(sdata, skb); 1862 else 1863 ieee80211_iface_process_skb(local, sdata, skb); 1864 1865 consume_skb(skb); 1866 kcov_remote_stop(); 1867 } 1868 1869 /* process status queue */ 1870 while ((skb = skb_dequeue(&sdata->status_queue))) { 1871 kcov_remote_start_common(skb_get_kcov_handle(skb)); 1872 1873 ieee80211_iface_process_status(sdata, skb); 1874 consume_skb(skb); 1875 1876 kcov_remote_stop(); 1877 } 1878 1879 /* then other type-dependent work */ 1880 switch (sdata->vif.type) { 1881 case NL80211_IFTYPE_STATION: 1882 ieee80211_sta_work(sdata); 1883 break; 1884 case NL80211_IFTYPE_ADHOC: 1885 ieee80211_ibss_work(sdata); 1886 break; 1887 case NL80211_IFTYPE_MESH_POINT: 1888 if (!ieee80211_vif_is_mesh(&sdata->vif)) 1889 break; 1890 ieee80211_mesh_work(sdata); 1891 break; 1892 case NL80211_IFTYPE_OCB: 1893 ieee80211_ocb_work(sdata); 1894 break; 1895 default: 1896 break; 1897 } 1898 } 1899 1900 static void ieee80211_activate_links_work(struct wiphy *wiphy, 1901 struct wiphy_work *work) 1902 { 1903 struct ieee80211_sub_if_data *sdata = 1904 container_of(work, struct ieee80211_sub_if_data, 1905 activate_links_work); 1906 struct ieee80211_local *local = wiphy_priv(wiphy); 1907 1908 if (local->in_reconfig) 1909 return; 1910 1911 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links); 1912 sdata->desired_active_links = 0; 1913 } 1914 1915 /* 1916 * Helper function to initialise an interface to a specific type. 1917 */ 1918 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, 1919 enum nl80211_iftype type) 1920 { 1921 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff, 1922 0xff, 0xff, 0xff}; 1923 1924 /* clear type-dependent unions */ 1925 memset(&sdata->u, 0, sizeof(sdata->u)); 1926 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u)); 1927 1928 /* and set some type-dependent values */ 1929 sdata->vif.type = type; 1930 sdata->vif.p2p = false; 1931 sdata->wdev.iftype = type; 1932 1933 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); 1934 sdata->control_port_no_encrypt = false; 1935 sdata->control_port_over_nl80211 = false; 1936 sdata->control_port_no_preauth = false; 1937 sdata->vif.cfg.idle = true; 1938 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */ 1939 1940 sdata->noack_map = 0; 1941 1942 /* only monitor/p2p-device differ */ 1943 if (sdata->dev) { 1944 sdata->dev->netdev_ops = &ieee80211_dataif_ops; 1945 sdata->dev->type = ARPHRD_ETHER; 1946 } 1947 1948 skb_queue_head_init(&sdata->skb_queue); 1949 skb_queue_head_init(&sdata->status_queue); 1950 wiphy_work_init(&sdata->work, ieee80211_iface_work); 1951 wiphy_work_init(&sdata->activate_links_work, 1952 ieee80211_activate_links_work); 1953 1954 switch (type) { 1955 case NL80211_IFTYPE_P2P_GO: 1956 type = NL80211_IFTYPE_AP; 1957 sdata->vif.type = type; 1958 sdata->vif.p2p = true; 1959 fallthrough; 1960 case NL80211_IFTYPE_AP: 1961 skb_queue_head_init(&sdata->u.ap.ps.bc_buf); 1962 INIT_LIST_HEAD(&sdata->u.ap.vlans); 1963 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1964 break; 1965 case NL80211_IFTYPE_P2P_CLIENT: 1966 type = NL80211_IFTYPE_STATION; 1967 sdata->vif.type = type; 1968 sdata->vif.p2p = true; 1969 fallthrough; 1970 case NL80211_IFTYPE_STATION: 1971 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid; 1972 ieee80211_sta_setup_sdata(sdata); 1973 break; 1974 case NL80211_IFTYPE_OCB: 1975 sdata->vif.bss_conf.bssid = bssid_wildcard; 1976 ieee80211_ocb_setup_sdata(sdata); 1977 break; 1978 case NL80211_IFTYPE_ADHOC: 1979 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 1980 ieee80211_ibss_setup_sdata(sdata); 1981 break; 1982 case NL80211_IFTYPE_MESH_POINT: 1983 if (ieee80211_vif_is_mesh(&sdata->vif)) 1984 ieee80211_mesh_init_sdata(sdata); 1985 break; 1986 case NL80211_IFTYPE_MONITOR: 1987 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; 1988 sdata->dev->netdev_ops = &ieee80211_monitorif_ops; 1989 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL | 1990 MONITOR_FLAG_OTHER_BSS; 1991 break; 1992 case NL80211_IFTYPE_NAN: 1993 if (!(sdata->local->hw.wiphy->nan_capa.flags & 1994 WIPHY_NAN_FLAGS_USERSPACE_DE)) { 1995 idr_init(&sdata->u.nan.de.function_inst_ids); 1996 spin_lock_init(&sdata->u.nan.de.func_lock); 1997 } 1998 sdata->vif.bss_conf.bssid = sdata->vif.addr; 1999 break; 2000 case NL80211_IFTYPE_AP_VLAN: 2001 case NL80211_IFTYPE_P2P_DEVICE: 2002 sdata->vif.bss_conf.bssid = sdata->vif.addr; 2003 break; 2004 case NL80211_IFTYPE_NAN_DATA: 2005 case NL80211_IFTYPE_PD: 2006 break; 2007 case NL80211_IFTYPE_UNSPECIFIED: 2008 case NL80211_IFTYPE_WDS: 2009 case NUM_NL80211_IFTYPES: 2010 WARN_ON(1); 2011 break; 2012 } 2013 2014 /* need to do this after the switch so vif.type is correct */ 2015 ieee80211_link_setup(&sdata->deflink); 2016 2017 ieee80211_debugfs_recreate_netdev(sdata, false); 2018 } 2019 2020 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata, 2021 enum nl80211_iftype type) 2022 { 2023 struct ieee80211_local *local = sdata->local; 2024 int ret, err; 2025 enum nl80211_iftype internal_type = type; 2026 bool p2p = false; 2027 2028 ASSERT_RTNL(); 2029 2030 if (!local->ops->change_interface) 2031 return -EBUSY; 2032 2033 /* for now, don't support changing while links exist */ 2034 if (ieee80211_vif_is_mld(&sdata->vif)) 2035 return -EBUSY; 2036 2037 switch (sdata->vif.type) { 2038 case NL80211_IFTYPE_AP: 2039 if (!list_empty(&sdata->u.ap.vlans)) 2040 return -EBUSY; 2041 break; 2042 case NL80211_IFTYPE_STATION: 2043 case NL80211_IFTYPE_ADHOC: 2044 case NL80211_IFTYPE_OCB: 2045 /* 2046 * Could maybe also all others here? 2047 * Just not sure how that interacts 2048 * with the RX/config path e.g. for 2049 * mesh. 2050 */ 2051 break; 2052 default: 2053 return -EBUSY; 2054 } 2055 2056 switch (type) { 2057 case NL80211_IFTYPE_AP: 2058 case NL80211_IFTYPE_STATION: 2059 case NL80211_IFTYPE_ADHOC: 2060 case NL80211_IFTYPE_OCB: 2061 /* 2062 * Could probably support everything 2063 * but here. 2064 */ 2065 break; 2066 case NL80211_IFTYPE_P2P_CLIENT: 2067 p2p = true; 2068 internal_type = NL80211_IFTYPE_STATION; 2069 break; 2070 case NL80211_IFTYPE_P2P_GO: 2071 p2p = true; 2072 internal_type = NL80211_IFTYPE_AP; 2073 break; 2074 default: 2075 return -EBUSY; 2076 } 2077 2078 ret = ieee80211_check_concurrent_iface(sdata, internal_type); 2079 if (ret) 2080 return ret; 2081 2082 ieee80211_stop_vif_queues(local, sdata, 2083 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2084 /* do_stop will synchronize_rcu() first thing */ 2085 ieee80211_do_stop(sdata, false); 2086 2087 ieee80211_teardown_sdata(sdata); 2088 2089 ieee80211_set_sdata_offload_flags(sdata); 2090 ret = drv_change_interface(local, sdata, internal_type, p2p); 2091 if (ret) 2092 type = ieee80211_vif_type_p2p(&sdata->vif); 2093 2094 /* 2095 * Ignore return value here, there's not much we can do since 2096 * the driver changed the interface type internally already. 2097 * The warnings will hopefully make driver authors fix it :-) 2098 */ 2099 ieee80211_check_queues(sdata, type); 2100 2101 ieee80211_setup_sdata(sdata, type); 2102 ieee80211_set_vif_encap_ops(sdata); 2103 2104 err = ieee80211_do_open(&sdata->wdev, false); 2105 WARN(err, "type change: do_open returned %d", err); 2106 2107 ieee80211_wake_vif_queues(local, sdata, 2108 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE); 2109 return ret; 2110 } 2111 2112 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, 2113 enum nl80211_iftype type) 2114 { 2115 int ret; 2116 2117 ASSERT_RTNL(); 2118 2119 if (type == ieee80211_vif_type_p2p(&sdata->vif)) 2120 return 0; 2121 2122 if (ieee80211_sdata_running(sdata)) { 2123 ret = ieee80211_runtime_change_iftype(sdata, type); 2124 if (ret) 2125 return ret; 2126 } else { 2127 /* Purge and reset type-dependent state. */ 2128 ieee80211_teardown_sdata(sdata); 2129 ieee80211_setup_sdata(sdata, type); 2130 } 2131 2132 /* reset some values that shouldn't be kept across type changes */ 2133 if (type == NL80211_IFTYPE_STATION) 2134 sdata->u.mgd.use_4addr = false; 2135 2136 return 0; 2137 } 2138 2139 static void ieee80211_assign_perm_addr(struct ieee80211_local *local, 2140 u8 *perm_addr, enum nl80211_iftype type) 2141 { 2142 struct ieee80211_sub_if_data *sdata; 2143 u64 mask, start, addr, val, inc; 2144 u8 *m; 2145 u8 tmp_addr[ETH_ALEN]; 2146 int i; 2147 2148 lockdep_assert_wiphy(local->hw.wiphy); 2149 2150 /* default ... something at least */ 2151 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN); 2152 2153 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) && 2154 local->hw.wiphy->n_addresses <= 1) 2155 return; 2156 2157 switch (type) { 2158 case NL80211_IFTYPE_MONITOR: 2159 /* doesn't matter */ 2160 break; 2161 case NL80211_IFTYPE_AP_VLAN: 2162 /* match up with an AP interface */ 2163 list_for_each_entry(sdata, &local->interfaces, list) { 2164 if (sdata->vif.type != NL80211_IFTYPE_AP) 2165 continue; 2166 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2167 break; 2168 } 2169 /* keep default if no AP interface present */ 2170 break; 2171 case NL80211_IFTYPE_P2P_CLIENT: 2172 case NL80211_IFTYPE_P2P_GO: 2173 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) { 2174 list_for_each_entry(sdata, &local->interfaces, list) { 2175 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) 2176 continue; 2177 if (!ieee80211_sdata_running(sdata)) 2178 continue; 2179 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN); 2180 return; 2181 } 2182 } 2183 fallthrough; 2184 default: 2185 /* assign a new address if possible -- try n_addresses first */ 2186 for (i = 0; i < local->hw.wiphy->n_addresses; i++) { 2187 bool used = false; 2188 2189 list_for_each_entry(sdata, &local->interfaces, list) { 2190 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr, 2191 sdata->vif.addr)) { 2192 used = true; 2193 break; 2194 } 2195 } 2196 2197 if (!used) { 2198 memcpy(perm_addr, 2199 local->hw.wiphy->addresses[i].addr, 2200 ETH_ALEN); 2201 break; 2202 } 2203 } 2204 2205 /* try mask if available */ 2206 if (is_zero_ether_addr(local->hw.wiphy->addr_mask)) 2207 break; 2208 2209 m = local->hw.wiphy->addr_mask; 2210 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2211 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2212 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2213 2214 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) { 2215 /* not a contiguous mask ... not handled now! */ 2216 pr_info("not contiguous\n"); 2217 break; 2218 } 2219 2220 /* 2221 * Pick address of existing interface in case user changed 2222 * MAC address manually, default to perm_addr. 2223 */ 2224 m = local->hw.wiphy->perm_addr; 2225 list_for_each_entry(sdata, &local->interfaces, list) { 2226 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) 2227 continue; 2228 m = sdata->vif.addr; 2229 break; 2230 } 2231 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) | 2232 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) | 2233 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8); 2234 2235 inc = 1ULL<<__ffs64(mask); 2236 val = (start & mask); 2237 addr = (start & ~mask) | (val & mask); 2238 do { 2239 bool used = false; 2240 2241 tmp_addr[5] = addr >> 0*8; 2242 tmp_addr[4] = addr >> 1*8; 2243 tmp_addr[3] = addr >> 2*8; 2244 tmp_addr[2] = addr >> 3*8; 2245 tmp_addr[1] = addr >> 4*8; 2246 tmp_addr[0] = addr >> 5*8; 2247 2248 val += inc; 2249 2250 list_for_each_entry(sdata, &local->interfaces, list) { 2251 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) { 2252 used = true; 2253 break; 2254 } 2255 } 2256 2257 if (!used) { 2258 memcpy(perm_addr, tmp_addr, ETH_ALEN); 2259 break; 2260 } 2261 addr = (start & ~mask) | (val & mask); 2262 } while (addr != start); 2263 2264 break; 2265 } 2266 } 2267 2268 int ieee80211_if_add(struct ieee80211_local *local, const char *name, 2269 unsigned char name_assign_type, 2270 struct wireless_dev **new_wdev, enum nl80211_iftype type, 2271 struct vif_params *params) 2272 { 2273 struct net_device *ndev = NULL; 2274 struct ieee80211_sub_if_data *sdata = NULL; 2275 struct txq_info *txqi; 2276 int ret, i; 2277 2278 ASSERT_RTNL(); 2279 lockdep_assert_wiphy(local->hw.wiphy); 2280 2281 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) { 2282 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2283 sizeof(void *)); 2284 struct wireless_dev *wdev; 2285 int txq_size = 0; 2286 2287 if (type == NL80211_IFTYPE_NAN) 2288 txq_size = sizeof(struct txq_info) + 2289 local->hw.txq_data_size; 2290 2291 sdata = kzalloc(size + txq_size, GFP_KERNEL); 2292 if (!sdata) 2293 return -ENOMEM; 2294 wdev = &sdata->wdev; 2295 2296 sdata->dev = NULL; 2297 strscpy(sdata->name, name, IFNAMSIZ); 2298 2299 if (is_valid_ether_addr(params->macaddr)) 2300 memcpy(wdev->address, params->macaddr, ETH_ALEN); 2301 else 2302 ieee80211_assign_perm_addr(local, wdev->address, type); 2303 2304 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN); 2305 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2306 2307 /* 2308 * Add a management TXQ for NAN devices which includes frames 2309 * that will only be transmitted during discovery windows (DWs) 2310 */ 2311 if (type == NL80211_IFTYPE_NAN) { 2312 txqi = (struct txq_info *)((unsigned long)sdata + size); 2313 ieee80211_txq_init(sdata, NULL, txqi, 2314 IEEE80211_NUM_TIDS); 2315 } 2316 } else { 2317 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size, 2318 sizeof(void *)); 2319 int txq_size = 0; 2320 2321 if (type != NL80211_IFTYPE_AP_VLAN && 2322 (type != NL80211_IFTYPE_MONITOR || 2323 (params->flags & MONITOR_FLAG_ACTIVE))) 2324 txq_size += sizeof(struct txq_info) + 2325 local->hw.txq_data_size; 2326 2327 ndev = alloc_netdev_mqs(size + txq_size, 2328 name, name_assign_type, 2329 ieee80211_if_setup, 1, 1); 2330 if (!ndev) 2331 return -ENOMEM; 2332 2333 dev_net_set(ndev, wiphy_net(local->hw.wiphy)); 2334 2335 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2336 2337 ndev->needed_headroom = local->tx_headroom + 2338 4*6 /* four MAC addresses */ 2339 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ 2340 + 6 /* mesh */ 2341 + 8 /* rfc1042/bridge tunnel */ 2342 - ETH_HLEN /* ethernet hard_header_len */ 2343 + IEEE80211_ENCRYPT_HEADROOM; 2344 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; 2345 2346 ret = dev_alloc_name(ndev, ndev->name); 2347 if (ret < 0) { 2348 free_netdev(ndev); 2349 return ret; 2350 } 2351 2352 ieee80211_assign_perm_addr(local, ndev->perm_addr, type); 2353 if (is_valid_ether_addr(params->macaddr)) 2354 eth_hw_addr_set(ndev, params->macaddr); 2355 else 2356 eth_hw_addr_set(ndev, ndev->perm_addr); 2357 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); 2358 2359 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */ 2360 sdata = netdev_priv(ndev); 2361 ndev->ieee80211_ptr = &sdata->wdev; 2362 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN); 2363 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr); 2364 memcpy(sdata->name, ndev->name, IFNAMSIZ); 2365 2366 if (txq_size) { 2367 txqi = netdev_priv(ndev) + size; 2368 ieee80211_txq_init(sdata, NULL, txqi, 0); 2369 } 2370 2371 sdata->dev = ndev; 2372 } 2373 2374 /* initialise type-independent data */ 2375 sdata->wdev.wiphy = local->hw.wiphy; 2376 2377 ieee80211_sdata_init(local, sdata); 2378 2379 ieee80211_init_frag_cache(&sdata->frags); 2380 2381 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk, 2382 ieee80211_delayed_tailroom_dec); 2383 2384 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2385 struct ieee80211_supported_band *sband; 2386 sband = local->hw.wiphy->bands[i]; 2387 sdata->rc_rateidx_mask[i] = 2388 sband ? (1 << sband->n_bitrates) - 1 : 0; 2389 if (sband) { 2390 __le16 cap; 2391 u16 *vht_rate_mask; 2392 2393 memcpy(sdata->rc_rateidx_mcs_mask[i], 2394 sband->ht_cap.mcs.rx_mask, 2395 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2396 2397 cap = sband->vht_cap.vht_mcs.rx_mcs_map; 2398 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i]; 2399 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask); 2400 } else { 2401 memset(sdata->rc_rateidx_mcs_mask[i], 0, 2402 sizeof(sdata->rc_rateidx_mcs_mask[i])); 2403 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0, 2404 sizeof(sdata->rc_rateidx_vht_mcs_mask[i])); 2405 } 2406 } 2407 2408 ieee80211_set_default_queues(sdata); 2409 2410 /* setup type-dependent data */ 2411 ieee80211_setup_sdata(sdata, type); 2412 2413 if (ndev) { 2414 ndev->ieee80211_ptr->use_4addr = params->use_4addr; 2415 if (type == NL80211_IFTYPE_STATION) 2416 sdata->u.mgd.use_4addr = params->use_4addr; 2417 2418 ndev->features |= local->hw.netdev_features; 2419 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 2420 ndev->hw_features |= ndev->features & 2421 MAC80211_SUPPORTED_FEATURES_TX; 2422 sdata->vif.netdev_features = local->hw.netdev_features; 2423 2424 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); 2425 2426 /* MTU range is normally 256 - 2304, where the upper limit is 2427 * the maximum MSDU size. Monitor interfaces send and receive 2428 * MPDU and A-MSDU frames which may be much larger so we do 2429 * not impose an upper limit in that case. 2430 */ 2431 ndev->min_mtu = 256; 2432 if (type == NL80211_IFTYPE_MONITOR) 2433 ndev->max_mtu = 0; 2434 else 2435 ndev->max_mtu = local->hw.max_mtu; 2436 2437 ret = cfg80211_register_netdevice(ndev); 2438 if (ret) { 2439 free_netdev(ndev); 2440 return ret; 2441 } 2442 } 2443 2444 mutex_lock(&local->iflist_mtx); 2445 list_add_tail_rcu(&sdata->list, &local->interfaces); 2446 mutex_unlock(&local->iflist_mtx); 2447 2448 if (new_wdev) 2449 *new_wdev = &sdata->wdev; 2450 2451 return 0; 2452 } 2453 2454 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) 2455 { 2456 ASSERT_RTNL(); 2457 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2458 2459 mutex_lock(&sdata->local->iflist_mtx); 2460 list_del_rcu(&sdata->list); 2461 mutex_unlock(&sdata->local->iflist_mtx); 2462 2463 if (sdata->vif.txq) 2464 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq)); 2465 2466 if (sdata->vif.txq_mgmt) 2467 ieee80211_txq_purge(sdata->local, 2468 to_txq_info(sdata->vif.txq_mgmt)); 2469 2470 synchronize_rcu(); 2471 2472 cfg80211_unregister_wdev(&sdata->wdev); 2473 2474 if (!sdata->dev) { 2475 ieee80211_teardown_sdata(sdata); 2476 kfree(sdata); 2477 } 2478 } 2479 2480 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata) 2481 { 2482 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state))) 2483 return; 2484 ieee80211_do_stop(sdata, true); 2485 } 2486 2487 void ieee80211_remove_interfaces(struct ieee80211_local *local) 2488 { 2489 struct ieee80211_sub_if_data *sdata, *tmp; 2490 LIST_HEAD(unreg_list); 2491 2492 ASSERT_RTNL(); 2493 2494 /* Before destroying the interfaces, make sure they're all stopped so 2495 * that the hardware is stopped. Otherwise, the driver might still be 2496 * iterating the interfaces during the shutdown, e.g. from a worker 2497 * or from RX processing or similar, and if it does so (using atomic 2498 * iteration) while we're manipulating the list, the iteration will 2499 * crash. 2500 * 2501 * After this, the hardware should be stopped and the driver should 2502 * have stopped all of its activities, so that we can do RCU-unaware 2503 * manipulations of the interface list below. 2504 */ 2505 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2506 2507 guard(wiphy)(local->hw.wiphy); 2508 2509 WARN(local->open_count, "%s: open count remains %d\n", 2510 wiphy_name(local->hw.wiphy), local->open_count); 2511 2512 mutex_lock(&local->iflist_mtx); 2513 list_splice_init(&local->interfaces, &unreg_list); 2514 mutex_unlock(&local->iflist_mtx); 2515 2516 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) { 2517 bool netdev = sdata->dev; 2518 2519 /* 2520 * Remove IP addresses explicitly, since the notifier will 2521 * skip the callbacks if wdev->registered is false, since 2522 * we can't acquire the wiphy_lock() again there if already 2523 * inside this locked section. 2524 */ 2525 sdata->vif.cfg.arp_addr_cnt = 0; 2526 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2527 sdata->u.mgd.associated) 2528 ieee80211_vif_cfg_change_notify(sdata, 2529 BSS_CHANGED_ARP_FILTER); 2530 2531 list_del(&sdata->list); 2532 cfg80211_unregister_wdev(&sdata->wdev); 2533 2534 if (!netdev) 2535 kfree(sdata); 2536 } 2537 } 2538 2539 static int netdev_notify(struct notifier_block *nb, 2540 unsigned long state, void *ptr) 2541 { 2542 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2543 struct ieee80211_sub_if_data *sdata; 2544 2545 if (state != NETDEV_CHANGENAME) 2546 return NOTIFY_DONE; 2547 2548 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) 2549 return NOTIFY_DONE; 2550 2551 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) 2552 return NOTIFY_DONE; 2553 2554 sdata = IEEE80211_DEV_TO_SUB_IF(dev); 2555 memcpy(sdata->name, dev->name, IFNAMSIZ); 2556 ieee80211_debugfs_rename_netdev(sdata); 2557 2558 return NOTIFY_OK; 2559 } 2560 2561 static struct notifier_block mac80211_netdev_notifier = { 2562 .notifier_call = netdev_notify, 2563 }; 2564 2565 int ieee80211_iface_init(void) 2566 { 2567 return register_netdevice_notifier(&mac80211_netdev_notifier); 2568 } 2569 2570 void ieee80211_iface_exit(void) 2571 { 2572 unregister_netdevice_notifier(&mac80211_netdev_notifier); 2573 } 2574 2575 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata) 2576 { 2577 if (sdata->vif.type == NL80211_IFTYPE_AP) 2578 atomic_inc(&sdata->u.ap.num_mcast_sta); 2579 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2580 atomic_inc(&sdata->u.vlan.num_mcast_sta); 2581 } 2582 2583 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata) 2584 { 2585 if (sdata->vif.type == NL80211_IFTYPE_AP) 2586 atomic_dec(&sdata->u.ap.num_mcast_sta); 2587 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 2588 atomic_dec(&sdata->u.vlan.num_mcast_sta); 2589 } 2590 2591 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata) 2592 { 2593 struct ieee80211_local *local = sdata->local; 2594 2595 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) 2596 return; 2597 2598 ieee80211_stop_vif_queues_norefcount(local, sdata, 2599 IEEE80211_QUEUE_STOP_REASON_CSA); 2600 } 2601 2602 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata) 2603 { 2604 struct ieee80211_local *local = sdata->local; 2605 2606 ieee80211_wake_vif_queues_norefcount(local, sdata, 2607 IEEE80211_QUEUE_STOP_REASON_CSA); 2608 } 2609