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) 2018-2025 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
__ieee80211_recalc_txpower(struct ieee80211_link_data * link)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
ieee80211_recalc_txpower(struct ieee80211_link_data * link,bool update_bss)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
__ieee80211_idle_off(struct ieee80211_local * local)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
__ieee80211_idle_on(struct ieee80211_local * local)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
__ieee80211_recalc_idle(struct ieee80211_local * local,bool force_active)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
111 lockdep_assert_wiphy(local->hw.wiphy);
112
113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
115 local->monitors;
116
117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
119
120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122
123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 else
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127
128 if (active)
129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 else
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134
135 if (working || scanning || active)
136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
138 }
139
ieee80211_idle_off(struct ieee80211_local * local)140 u32 ieee80211_idle_off(struct ieee80211_local *local)
141 {
142 return __ieee80211_recalc_idle(local, true);
143 }
144
ieee80211_recalc_idle(struct ieee80211_local * local)145 void ieee80211_recalc_idle(struct ieee80211_local *local)
146 {
147 u32 change = __ieee80211_recalc_idle(local, false);
148 if (change)
149 ieee80211_hw_config(local, change);
150 }
151
ieee80211_verify_mac(struct ieee80211_sub_if_data * sdata,u8 * addr,bool check_dup)152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
153 bool check_dup)
154 {
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
157 u64 new, mask, tmp;
158 u8 *m;
159 int ret = 0;
160
161 lockdep_assert_wiphy(local->hw.wiphy);
162
163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
164 return 0;
165
166 m = addr;
167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171 m = local->hw.wiphy->addr_mask;
172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
176 if (!check_dup)
177 return ret;
178
179 list_for_each_entry(iter, &local->interfaces, list) {
180 if (iter == sdata)
181 continue;
182
183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
185 continue;
186
187 m = iter->vif.addr;
188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
191
192 if ((new & ~mask) != (tmp & ~mask)) {
193 ret = -EINVAL;
194 break;
195 }
196 }
197
198 return ret;
199 }
200
ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data * sdata)201 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
202 {
203 struct ieee80211_roc_work *roc;
204 struct ieee80211_local *local = sdata->local;
205 struct ieee80211_sub_if_data *scan_sdata;
206 int ret = 0;
207
208 lockdep_assert_wiphy(local->hw.wiphy);
209
210 /* To be the most flexible here we want to only limit changing the
211 * address if the specific interface is doing offchannel work or
212 * scanning.
213 */
214 if (netif_carrier_ok(sdata->dev))
215 return -EBUSY;
216
217 /* First check no ROC work is happening on this iface */
218 list_for_each_entry(roc, &local->roc_list, list) {
219 if (roc->sdata != sdata)
220 continue;
221
222 if (roc->started) {
223 ret = -EBUSY;
224 goto unlock;
225 }
226 }
227
228 /* And if this iface is scanning */
229 if (local->scanning) {
230 scan_sdata = rcu_dereference_protected(local->scan_sdata,
231 lockdep_is_held(&local->hw.wiphy->mtx));
232 if (sdata == scan_sdata)
233 ret = -EBUSY;
234 }
235
236 switch (sdata->vif.type) {
237 case NL80211_IFTYPE_STATION:
238 case NL80211_IFTYPE_P2P_CLIENT:
239 /* More interface types could be added here but changing the
240 * address while powered makes the most sense in client modes.
241 */
242 break;
243 default:
244 ret = -EOPNOTSUPP;
245 }
246
247 unlock:
248 return ret;
249 }
250
_ieee80211_change_mac(struct ieee80211_sub_if_data * sdata,void * addr)251 static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata,
252 void *addr)
253 {
254 struct ieee80211_local *local = sdata->local;
255 struct sockaddr *sa = addr;
256 bool check_dup = true;
257 bool live = false;
258 int ret;
259
260 if (ieee80211_sdata_running(sdata)) {
261 ret = ieee80211_can_powered_addr_change(sdata);
262 if (ret)
263 return ret;
264
265 live = true;
266 }
267
268 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
269 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
270 check_dup = false;
271
272 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
273 if (ret)
274 return ret;
275
276 if (live)
277 drv_remove_interface(local, sdata);
278 ret = eth_mac_addr(sdata->dev, sa);
279
280 if (ret == 0) {
281 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
282 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
283 }
284
285 /* Regardless of eth_mac_addr() return we still want to add the
286 * interface back. This should not fail...
287 */
288 if (live)
289 WARN_ON(drv_add_interface(local, sdata));
290
291 return ret;
292 }
293
ieee80211_change_mac(struct net_device * dev,void * addr)294 static int ieee80211_change_mac(struct net_device *dev, void *addr)
295 {
296 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
297 struct ieee80211_local *local = sdata->local;
298
299 /*
300 * This happens during unregistration if there's a bond device
301 * active (maybe other cases?) and we must get removed from it.
302 * But we really don't care anymore if it's not registered now.
303 */
304 if (!dev->ieee80211_ptr->registered)
305 return 0;
306
307 guard(wiphy)(local->hw.wiphy);
308
309 return _ieee80211_change_mac(sdata, addr);
310 }
311
identical_mac_addr_allowed(int type1,int type2)312 static inline int identical_mac_addr_allowed(int type1, int type2)
313 {
314 return type1 == NL80211_IFTYPE_MONITOR ||
315 type2 == NL80211_IFTYPE_MONITOR ||
316 type1 == NL80211_IFTYPE_P2P_DEVICE ||
317 type2 == NL80211_IFTYPE_P2P_DEVICE ||
318 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
319 (type1 == NL80211_IFTYPE_AP_VLAN &&
320 (type2 == NL80211_IFTYPE_AP ||
321 type2 == NL80211_IFTYPE_AP_VLAN));
322 }
323
ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)324 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
325 enum nl80211_iftype iftype)
326 {
327 struct ieee80211_local *local = sdata->local;
328 struct ieee80211_sub_if_data *nsdata;
329
330 ASSERT_RTNL();
331 lockdep_assert_wiphy(local->hw.wiphy);
332
333 /* we hold the RTNL here so can safely walk the list */
334 list_for_each_entry(nsdata, &local->interfaces, list) {
335 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
336 /*
337 * Only OCB and monitor mode may coexist
338 */
339 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
340 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
341 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
342 nsdata->vif.type == NL80211_IFTYPE_OCB))
343 return -EBUSY;
344
345 /*
346 * Allow only a single IBSS interface to be up at any
347 * time. This is restricted because beacon distribution
348 * cannot work properly if both are in the same IBSS.
349 *
350 * To remove this restriction we'd have to disallow them
351 * from setting the same SSID on different IBSS interfaces
352 * belonging to the same hardware. Then, however, we're
353 * faced with having to adopt two different TSF timers...
354 */
355 if (iftype == NL80211_IFTYPE_ADHOC &&
356 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
357 return -EBUSY;
358 /*
359 * will not add another interface while any channel
360 * switch is active.
361 */
362 if (nsdata->vif.bss_conf.csa_active)
363 return -EBUSY;
364
365 /*
366 * The remaining checks are only performed for interfaces
367 * with the same MAC address.
368 */
369 if (!ether_addr_equal(sdata->vif.addr,
370 nsdata->vif.addr))
371 continue;
372
373 /*
374 * check whether it may have the same address
375 */
376 if (!identical_mac_addr_allowed(iftype,
377 nsdata->vif.type))
378 return -ENOTUNIQ;
379
380 /* No support for VLAN with MLO yet */
381 if (iftype == NL80211_IFTYPE_AP_VLAN &&
382 sdata->wdev.use_4addr &&
383 nsdata->vif.type == NL80211_IFTYPE_AP &&
384 nsdata->vif.valid_links)
385 return -EOPNOTSUPP;
386
387 /*
388 * can only add VLANs to enabled APs
389 */
390 if (iftype == NL80211_IFTYPE_AP_VLAN &&
391 nsdata->vif.type == NL80211_IFTYPE_AP)
392 sdata->bss = &nsdata->u.ap;
393 }
394 }
395
396 return ieee80211_check_combinations(sdata, NULL, 0, 0, -1);
397 }
398
ieee80211_check_queues(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)399 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
400 enum nl80211_iftype iftype)
401 {
402 int n_queues = sdata->local->hw.queues;
403 int i;
404
405 if (iftype == NL80211_IFTYPE_NAN)
406 return 0;
407
408 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
409 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
410 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
411 IEEE80211_INVAL_HW_QUEUE))
412 return -EINVAL;
413 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
414 n_queues))
415 return -EINVAL;
416 }
417 }
418
419 if ((iftype != NL80211_IFTYPE_AP &&
420 iftype != NL80211_IFTYPE_P2P_GO &&
421 iftype != NL80211_IFTYPE_MESH_POINT) ||
422 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
423 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
424 return 0;
425 }
426
427 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
428 return -EINVAL;
429
430 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
431 return -EINVAL;
432
433 return 0;
434 }
435
ieee80211_open(struct net_device * dev)436 static int ieee80211_open(struct net_device *dev)
437 {
438 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
439 int err;
440
441 /* fail early if user set an invalid address */
442 if (!is_valid_ether_addr(dev->dev_addr))
443 return -EADDRNOTAVAIL;
444
445 guard(wiphy)(sdata->local->hw.wiphy);
446
447 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
448 if (err)
449 return err;
450
451 return ieee80211_do_open(&sdata->wdev, true);
452 }
453
ieee80211_do_stop(struct ieee80211_sub_if_data * sdata,bool going_down)454 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
455 {
456 struct ieee80211_local *local = sdata->local;
457 unsigned long flags;
458 struct sk_buff_head freeq;
459 struct sk_buff *skb, *tmp;
460 u32 hw_reconf_flags = 0;
461 int i, flushed;
462 struct ps_data *ps;
463 struct cfg80211_chan_def chandef;
464 bool cancel_scan;
465 struct cfg80211_nan_func *func;
466
467 lockdep_assert_wiphy(local->hw.wiphy);
468
469 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
470 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
471
472 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
473 if (cancel_scan)
474 ieee80211_scan_cancel(local);
475
476 ieee80211_roc_purge(local, sdata);
477
478 switch (sdata->vif.type) {
479 case NL80211_IFTYPE_STATION:
480 ieee80211_mgd_stop(sdata);
481 break;
482 case NL80211_IFTYPE_ADHOC:
483 ieee80211_ibss_stop(sdata);
484 break;
485 case NL80211_IFTYPE_MONITOR:
486 list_del_rcu(&sdata->u.mntr.list);
487 break;
488 default:
489 break;
490 }
491
492 /*
493 * Remove all stations associated with this interface.
494 *
495 * This must be done before calling ops->remove_interface()
496 * because otherwise we can later invoke ops->sta_notify()
497 * whenever the STAs are removed, and that invalidates driver
498 * assumptions about always getting a vif pointer that is valid
499 * (because if we remove a STA after ops->remove_interface()
500 * the driver will have removed the vif info already!)
501 *
502 * For AP_VLANs stations may exist since there's nothing else that
503 * would have removed them, but in other modes there shouldn't
504 * be any stations.
505 */
506 flushed = sta_info_flush(sdata, -1);
507 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
508
509 /* don't count this interface for allmulti while it is down */
510 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
511 atomic_dec(&local->iff_allmultis);
512
513 if (sdata->vif.type == NL80211_IFTYPE_AP) {
514 local->fif_pspoll--;
515 local->fif_probe_req--;
516 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
517 local->fif_probe_req--;
518 }
519
520 if (sdata->dev) {
521 netif_addr_lock_bh(sdata->dev);
522 spin_lock_bh(&local->filter_lock);
523 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
524 sdata->dev->addr_len);
525 spin_unlock_bh(&local->filter_lock);
526 netif_addr_unlock_bh(sdata->dev);
527 }
528
529 timer_delete_sync(&local->dynamic_ps_timer);
530 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
531
532 WARN(ieee80211_vif_is_mld(&sdata->vif),
533 "destroying interface with valid links 0x%04x\n",
534 sdata->vif.valid_links);
535
536 sdata->vif.bss_conf.csa_active = false;
537 if (sdata->vif.type == NL80211_IFTYPE_STATION)
538 sdata->deflink.u.mgd.csa.waiting_bcn = false;
539 ieee80211_vif_unblock_queues_csa(sdata);
540
541 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work);
542 wiphy_work_cancel(local->hw.wiphy,
543 &sdata->deflink.color_change_finalize_work);
544 wiphy_delayed_work_cancel(local->hw.wiphy,
545 &sdata->deflink.dfs_cac_timer_work);
546
547 if (sdata->wdev.links[0].cac_started) {
548 chandef = sdata->vif.bss_conf.chanreq.oper;
549 WARN_ON(local->suspended);
550 ieee80211_link_release_channel(&sdata->deflink);
551 cfg80211_cac_event(sdata->dev, &chandef,
552 NL80211_RADAR_CAC_ABORTED,
553 GFP_KERNEL, 0);
554 }
555
556 if (sdata->vif.type == NL80211_IFTYPE_AP) {
557 WARN_ON(!list_empty(&sdata->u.ap.vlans));
558 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
559 /* remove all packets in parent bc_buf pointing to this dev */
560 ps = &sdata->bss->ps;
561
562 spin_lock_irqsave(&ps->bc_buf.lock, flags);
563 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
564 if (skb->dev == sdata->dev) {
565 __skb_unlink(skb, &ps->bc_buf);
566 local->total_ps_buffered--;
567 ieee80211_free_txskb(&local->hw, skb);
568 }
569 }
570 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
571 }
572
573 if (going_down)
574 local->open_count--;
575
576 switch (sdata->vif.type) {
577 case NL80211_IFTYPE_AP_VLAN:
578 list_del(&sdata->u.vlan.list);
579 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
580 /* see comment in the default case below */
581 ieee80211_free_keys(sdata, true);
582 /* no need to tell driver */
583 break;
584 case NL80211_IFTYPE_MONITOR:
585 local->monitors--;
586
587 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
588 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
589
590 local->virt_monitors--;
591 if (local->virt_monitors == 0) {
592 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
593 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
594 }
595
596 ieee80211_adjust_monitor_flags(sdata, -1);
597 }
598 break;
599 case NL80211_IFTYPE_NAN:
600 /* clean all the functions */
601 spin_lock_bh(&sdata->u.nan.func_lock);
602
603 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
604 idr_remove(&sdata->u.nan.function_inst_ids, i);
605 cfg80211_free_nan_func(func);
606 }
607 idr_destroy(&sdata->u.nan.function_inst_ids);
608
609 spin_unlock_bh(&sdata->u.nan.func_lock);
610 break;
611 case NL80211_IFTYPE_P2P_DEVICE:
612 /* relies on synchronize_rcu() below */
613 RCU_INIT_POINTER(local->p2p_sdata, NULL);
614 fallthrough;
615 default:
616 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
617 /*
618 * When we get here, the interface is marked down.
619 * Free the remaining keys, if there are any
620 * (which can happen in AP mode if userspace sets
621 * keys before the interface is operating)
622 *
623 * Force the key freeing to always synchronize_net()
624 * to wait for the RX path in case it is using this
625 * interface enqueuing frames at this very time on
626 * another CPU.
627 */
628 ieee80211_free_keys(sdata, true);
629 skb_queue_purge(&sdata->skb_queue);
630 skb_queue_purge(&sdata->status_queue);
631 }
632
633 /*
634 * Since ieee80211_free_txskb() may issue __dev_queue_xmit()
635 * which should be called with interrupts enabled, reclamation
636 * is done in two phases:
637 */
638 __skb_queue_head_init(&freeq);
639
640 /* unlink from local queues... */
641 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
642 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
643 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
644 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
645 if (info->control.vif == &sdata->vif) {
646 __skb_unlink(skb, &local->pending[i]);
647 __skb_queue_tail(&freeq, skb);
648 }
649 }
650 }
651 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
652
653 /* ... and perform actual reclamation with interrupts enabled. */
654 skb_queue_walk_safe(&freeq, skb, tmp) {
655 __skb_unlink(skb, &freeq);
656 ieee80211_free_txskb(&local->hw, skb);
657 }
658
659 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
660 ieee80211_txq_remove_vlan(local, sdata);
661
662 if (sdata->vif.txq)
663 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
664
665 sdata->bss = NULL;
666
667 if (local->open_count == 0)
668 ieee80211_clear_tx_pending(local);
669
670 sdata->vif.bss_conf.beacon_int = 0;
671
672 /*
673 * If the interface goes down while suspended, presumably because
674 * the device was unplugged and that happens before our resume,
675 * then the driver is already unconfigured and the remainder of
676 * this function isn't needed.
677 * XXX: what about WoWLAN? If the device has software state, e.g.
678 * memory allocated, it might expect teardown commands from
679 * mac80211 here?
680 */
681 if (local->suspended) {
682 WARN_ON(local->wowlan);
683 WARN_ON(rcu_access_pointer(local->monitor_sdata));
684 return;
685 }
686
687 switch (sdata->vif.type) {
688 case NL80211_IFTYPE_AP_VLAN:
689 break;
690 case NL80211_IFTYPE_MONITOR:
691 if (local->virt_monitors == 0)
692 ieee80211_del_virtual_monitor(local);
693
694 ieee80211_recalc_idle(local);
695 ieee80211_recalc_offload(local);
696
697 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
698 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
699 break;
700
701 ieee80211_link_release_channel(&sdata->deflink);
702 fallthrough;
703 default:
704 if (!going_down)
705 break;
706 drv_remove_interface(local, sdata);
707
708 /* Clear private driver data to prevent reuse */
709 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size);
710 }
711
712 ieee80211_recalc_ps(local);
713
714 if (cancel_scan)
715 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
716
717 if (local->open_count == 0) {
718 ieee80211_stop_device(local, false);
719
720 /* no reconfiguring after stop! */
721 return;
722 }
723
724 /* do after stop to avoid reconfiguring when we stop anyway */
725 ieee80211_configure_filter(local);
726 ieee80211_hw_config(local, hw_reconf_flags);
727
728 if (local->virt_monitors == local->open_count)
729 ieee80211_add_virtual_monitor(local);
730 }
731
ieee80211_stop_mbssid(struct ieee80211_sub_if_data * sdata)732 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
733 {
734 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
735 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
736
737 if (!tx_vif)
738 return;
739
740 tx_sdata = vif_to_sdata(tx_vif);
741 sdata->vif.mbssid_tx_vif = NULL;
742
743 list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
744 &tx_sdata->local->interfaces, list) {
745 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
746 non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
747 ieee80211_sdata_running(non_tx_sdata)) {
748 non_tx_sdata->vif.mbssid_tx_vif = NULL;
749 dev_close(non_tx_sdata->wdev.netdev);
750 }
751 }
752
753 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
754 tx_sdata->vif.mbssid_tx_vif = NULL;
755 dev_close(tx_sdata->wdev.netdev);
756 }
757 }
758
ieee80211_stop(struct net_device * dev)759 static int ieee80211_stop(struct net_device *dev)
760 {
761 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
762
763 /* close dependent VLAN and MBSSID interfaces before locking wiphy */
764 if (sdata->vif.type == NL80211_IFTYPE_AP) {
765 struct ieee80211_sub_if_data *vlan, *tmpsdata;
766
767 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
768 u.vlan.list)
769 dev_close(vlan->dev);
770
771 ieee80211_stop_mbssid(sdata);
772 }
773
774 guard(wiphy)(sdata->local->hw.wiphy);
775
776 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
777
778 ieee80211_do_stop(sdata, true);
779
780 return 0;
781 }
782
ieee80211_set_multicast_list(struct net_device * dev)783 static void ieee80211_set_multicast_list(struct net_device *dev)
784 {
785 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
786 struct ieee80211_local *local = sdata->local;
787 int allmulti, sdata_allmulti;
788
789 allmulti = !!(dev->flags & IFF_ALLMULTI);
790 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
791
792 if (allmulti != sdata_allmulti) {
793 if (dev->flags & IFF_ALLMULTI)
794 atomic_inc(&local->iff_allmultis);
795 else
796 atomic_dec(&local->iff_allmultis);
797 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
798 }
799
800 spin_lock_bh(&local->filter_lock);
801 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
802 spin_unlock_bh(&local->filter_lock);
803 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter);
804 }
805
806 /*
807 * Called when the netdev is removed or, by the code below, before
808 * the interface type changes.
809 */
ieee80211_teardown_sdata(struct ieee80211_sub_if_data * sdata)810 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
811 {
812 if (WARN_ON(!list_empty(&sdata->work.entry)))
813 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
814
815 /* free extra data */
816 ieee80211_free_keys(sdata, false);
817
818 ieee80211_debugfs_remove_netdev(sdata);
819
820 ieee80211_destroy_frag_cache(&sdata->frags);
821
822 if (ieee80211_vif_is_mesh(&sdata->vif))
823 ieee80211_mesh_teardown_sdata(sdata);
824
825 ieee80211_vif_clear_links(sdata);
826 ieee80211_link_stop(&sdata->deflink);
827 }
828
ieee80211_uninit(struct net_device * dev)829 static void ieee80211_uninit(struct net_device *dev)
830 {
831 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
832 }
833
ieee80211_netdev_setup_tc(struct net_device * dev,enum tc_setup_type type,void * type_data)834 static int ieee80211_netdev_setup_tc(struct net_device *dev,
835 enum tc_setup_type type, void *type_data)
836 {
837 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
838 struct ieee80211_local *local = sdata->local;
839
840 return drv_net_setup_tc(local, sdata, dev, type, type_data);
841 }
842
843 static const struct net_device_ops ieee80211_dataif_ops = {
844 .ndo_open = ieee80211_open,
845 .ndo_stop = ieee80211_stop,
846 .ndo_uninit = ieee80211_uninit,
847 .ndo_start_xmit = ieee80211_subif_start_xmit,
848 .ndo_set_rx_mode = ieee80211_set_multicast_list,
849 .ndo_set_mac_address = ieee80211_change_mac,
850 .ndo_setup_tc = ieee80211_netdev_setup_tc,
851 };
852
ieee80211_monitor_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)853 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
854 struct sk_buff *skb,
855 struct net_device *sb_dev)
856 {
857 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
858 struct ieee80211_local *local = sdata->local;
859 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
860 struct ieee80211_hdr *hdr;
861 int len_rthdr;
862
863 if (local->hw.queues < IEEE80211_NUM_ACS)
864 return 0;
865
866 /* reset flags and info before parsing radiotap header */
867 memset(info, 0, sizeof(*info));
868
869 if (!ieee80211_parse_tx_radiotap(skb, dev))
870 return 0; /* doesn't matter, frame will be dropped */
871
872 len_rthdr = ieee80211_get_radiotap_len(skb->data);
873 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
874 if (skb->len < len_rthdr + 2 ||
875 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
876 return 0; /* doesn't matter, frame will be dropped */
877
878 return ieee80211_select_queue_80211(sdata, skb, hdr);
879 }
880
881 static const struct net_device_ops ieee80211_monitorif_ops = {
882 .ndo_open = ieee80211_open,
883 .ndo_stop = ieee80211_stop,
884 .ndo_uninit = ieee80211_uninit,
885 .ndo_start_xmit = ieee80211_monitor_start_xmit,
886 .ndo_set_rx_mode = ieee80211_set_multicast_list,
887 .ndo_set_mac_address = ieee80211_change_mac,
888 .ndo_select_queue = ieee80211_monitor_select_queue,
889 };
890
ieee80211_netdev_fill_forward_path(struct net_device_path_ctx * ctx,struct net_device_path * path)891 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
892 struct net_device_path *path)
893 {
894 struct ieee80211_sub_if_data *sdata;
895 struct ieee80211_local *local;
896 struct sta_info *sta;
897 int ret = -ENOENT;
898
899 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
900 local = sdata->local;
901
902 if (!local->ops->net_fill_forward_path)
903 return -EOPNOTSUPP;
904
905 rcu_read_lock();
906 switch (sdata->vif.type) {
907 case NL80211_IFTYPE_AP_VLAN:
908 sta = rcu_dereference(sdata->u.vlan.sta);
909 if (sta)
910 break;
911 if (sdata->wdev.use_4addr)
912 goto out;
913 if (is_multicast_ether_addr(ctx->daddr))
914 goto out;
915 sta = sta_info_get_bss(sdata, ctx->daddr);
916 break;
917 case NL80211_IFTYPE_AP:
918 if (is_multicast_ether_addr(ctx->daddr))
919 goto out;
920 sta = sta_info_get(sdata, ctx->daddr);
921 break;
922 case NL80211_IFTYPE_STATION:
923 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
924 sta = sta_info_get(sdata, ctx->daddr);
925 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
926 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
927 goto out;
928
929 break;
930 }
931 }
932
933 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
934 break;
935 default:
936 goto out;
937 }
938
939 if (!sta)
940 goto out;
941
942 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
943 out:
944 rcu_read_unlock();
945
946 return ret;
947 }
948
949 static const struct net_device_ops ieee80211_dataif_8023_ops = {
950 .ndo_open = ieee80211_open,
951 .ndo_stop = ieee80211_stop,
952 .ndo_uninit = ieee80211_uninit,
953 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
954 .ndo_set_rx_mode = ieee80211_set_multicast_list,
955 .ndo_set_mac_address = ieee80211_change_mac,
956 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
957 .ndo_setup_tc = ieee80211_netdev_setup_tc,
958 };
959
ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)960 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
961 {
962 switch (iftype) {
963 /* P2P GO and client are mapped to AP/STATION types */
964 case NL80211_IFTYPE_AP:
965 case NL80211_IFTYPE_STATION:
966 return true;
967 default:
968 return false;
969 }
970 }
971
ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data * sdata)972 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
973 {
974 struct ieee80211_local *local = sdata->local;
975 u32 flags;
976
977 flags = sdata->vif.offload_flags;
978
979 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
980 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
981 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
982
983 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
984 local->hw.wiphy->frag_threshold != (u32)-1)
985 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
986
987 if (local->virt_monitors)
988 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
989 } else {
990 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
991 }
992
993 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
994 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
995 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
996
997 if (local->virt_monitors &&
998 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
999 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1000 } else {
1001 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1002 }
1003
1004 if (sdata->vif.offload_flags == flags)
1005 return false;
1006
1007 sdata->vif.offload_flags = flags;
1008 ieee80211_check_fast_rx_iface(sdata);
1009 return true;
1010 }
1011
ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data * sdata)1012 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1013 {
1014 struct ieee80211_local *local = sdata->local;
1015 struct ieee80211_sub_if_data *bss = sdata;
1016 bool enabled;
1017
1018 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1019 if (!sdata->bss)
1020 return;
1021
1022 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1023 }
1024
1025 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1026 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1027 return;
1028
1029 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1030 if (sdata->wdev.use_4addr &&
1031 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1032 enabled = false;
1033
1034 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1035 &ieee80211_dataif_ops;
1036 }
1037
ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data * sdata)1038 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1039 {
1040 struct ieee80211_local *local = sdata->local;
1041 struct ieee80211_sub_if_data *vsdata;
1042
1043 if (ieee80211_set_sdata_offload_flags(sdata)) {
1044 drv_update_vif_offload(local, sdata);
1045 ieee80211_set_vif_encap_ops(sdata);
1046 }
1047
1048 list_for_each_entry(vsdata, &local->interfaces, list) {
1049 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1050 vsdata->bss != &sdata->u.ap)
1051 continue;
1052
1053 ieee80211_set_vif_encap_ops(vsdata);
1054 }
1055 }
1056
ieee80211_recalc_offload(struct ieee80211_local * local)1057 void ieee80211_recalc_offload(struct ieee80211_local *local)
1058 {
1059 struct ieee80211_sub_if_data *sdata;
1060
1061 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1062 return;
1063
1064 lockdep_assert_wiphy(local->hw.wiphy);
1065
1066 list_for_each_entry(sdata, &local->interfaces, list) {
1067 if (!ieee80211_sdata_running(sdata))
1068 continue;
1069
1070 ieee80211_recalc_sdata_offload(sdata);
1071 }
1072 }
1073
ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data * sdata,const int offset)1074 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1075 const int offset)
1076 {
1077 struct ieee80211_local *local = sdata->local;
1078 u32 flags = sdata->u.mntr.flags;
1079
1080 #define ADJUST(_f, _s) do { \
1081 if (flags & MONITOR_FLAG_##_f) \
1082 local->fif_##_s += offset; \
1083 } while (0)
1084
1085 ADJUST(FCSFAIL, fcsfail);
1086 ADJUST(PLCPFAIL, plcpfail);
1087 ADJUST(CONTROL, control);
1088 ADJUST(CONTROL, pspoll);
1089 ADJUST(OTHER_BSS, other_bss);
1090 if (!(flags & MONITOR_FLAG_SKIP_TX))
1091 local->tx_mntrs += offset;
1092
1093 #undef ADJUST
1094 }
1095
ieee80211_set_default_queues(struct ieee80211_sub_if_data * sdata)1096 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1097 {
1098 struct ieee80211_local *local = sdata->local;
1099 int i;
1100
1101 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1102 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1103 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1104 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1105 sdata->vif.hw_queue[i] = i;
1106 else
1107 sdata->vif.hw_queue[i] = 0;
1108 }
1109 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1110 }
1111
ieee80211_sdata_init(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1112 static void ieee80211_sdata_init(struct ieee80211_local *local,
1113 struct ieee80211_sub_if_data *sdata)
1114 {
1115 sdata->local = local;
1116
1117 /*
1118 * Initialize the default link, so we can use link_id 0 for non-MLD,
1119 * and that continues to work for non-MLD-aware drivers that use just
1120 * vif.bss_conf instead of vif.link_conf.
1121 *
1122 * Note that we never change this, so if link ID 0 isn't used in an
1123 * MLD connection, we get a separate allocation for it.
1124 */
1125 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1126 }
1127
ieee80211_add_virtual_monitor(struct ieee80211_local * local)1128 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1129 {
1130 struct ieee80211_sub_if_data *sdata;
1131 int ret;
1132
1133 ASSERT_RTNL();
1134 lockdep_assert_wiphy(local->hw.wiphy);
1135
1136 if (local->monitor_sdata ||
1137 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1138 return 0;
1139
1140 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1141 if (!sdata)
1142 return -ENOMEM;
1143
1144 /* set up data */
1145 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1146 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1147 wiphy_name(local->hw.wiphy));
1148 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1149 sdata->wdev.wiphy = local->hw.wiphy;
1150
1151 ieee80211_sdata_init(local, sdata);
1152
1153 ieee80211_set_default_queues(sdata);
1154
1155 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1156 ret = drv_add_interface(local, sdata);
1157 if (WARN_ON(ret)) {
1158 /* ok .. stupid driver, it asked for this! */
1159 kfree(sdata);
1160 return ret;
1161 }
1162 }
1163
1164 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1165
1166 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1167 if (ret) {
1168 kfree(sdata);
1169 return ret;
1170 }
1171
1172 mutex_lock(&local->iflist_mtx);
1173 rcu_assign_pointer(local->monitor_sdata, sdata);
1174 mutex_unlock(&local->iflist_mtx);
1175
1176 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq,
1177 IEEE80211_CHANCTX_EXCLUSIVE);
1178 if (ret) {
1179 mutex_lock(&local->iflist_mtx);
1180 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1181 mutex_unlock(&local->iflist_mtx);
1182 synchronize_net();
1183 drv_remove_interface(local, sdata);
1184 kfree(sdata);
1185 return ret;
1186 }
1187
1188 skb_queue_head_init(&sdata->skb_queue);
1189 skb_queue_head_init(&sdata->status_queue);
1190 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1191
1192 return 0;
1193 }
1194
ieee80211_del_virtual_monitor(struct ieee80211_local * local)1195 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1196 {
1197 struct ieee80211_sub_if_data *sdata;
1198
1199 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1200 return;
1201
1202 ASSERT_RTNL();
1203 lockdep_assert_wiphy(local->hw.wiphy);
1204
1205 mutex_lock(&local->iflist_mtx);
1206
1207 sdata = rcu_dereference_protected(local->monitor_sdata,
1208 lockdep_is_held(&local->iflist_mtx));
1209 if (!sdata) {
1210 mutex_unlock(&local->iflist_mtx);
1211 return;
1212 }
1213
1214 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1215 ieee80211_link_release_channel(&sdata->deflink);
1216
1217 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1218 drv_remove_interface(local, sdata);
1219
1220 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1221 mutex_unlock(&local->iflist_mtx);
1222
1223 synchronize_net();
1224
1225 kfree(sdata);
1226 }
1227
1228 /*
1229 * NOTE: Be very careful when changing this function, it must NOT return
1230 * an error on interface type changes that have been pre-checked, so most
1231 * checks should be in ieee80211_check_concurrent_iface.
1232 */
ieee80211_do_open(struct wireless_dev * wdev,bool coming_up)1233 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1234 {
1235 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1236 struct net_device *dev = wdev->netdev;
1237 struct ieee80211_local *local = sdata->local;
1238 u64 changed = 0;
1239 int res;
1240 u32 hw_reconf_flags = 0;
1241
1242 lockdep_assert_wiphy(local->hw.wiphy);
1243
1244 switch (sdata->vif.type) {
1245 case NL80211_IFTYPE_AP_VLAN: {
1246 struct ieee80211_sub_if_data *master;
1247
1248 if (!sdata->bss)
1249 return -ENOLINK;
1250
1251 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1252
1253 master = container_of(sdata->bss,
1254 struct ieee80211_sub_if_data, u.ap);
1255 sdata->control_port_protocol =
1256 master->control_port_protocol;
1257 sdata->control_port_no_encrypt =
1258 master->control_port_no_encrypt;
1259 sdata->control_port_over_nl80211 =
1260 master->control_port_over_nl80211;
1261 sdata->control_port_no_preauth =
1262 master->control_port_no_preauth;
1263 sdata->vif.cab_queue = master->vif.cab_queue;
1264 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1265 sizeof(sdata->vif.hw_queue));
1266 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq;
1267
1268 sdata->crypto_tx_tailroom_needed_cnt +=
1269 master->crypto_tx_tailroom_needed_cnt;
1270
1271 break;
1272 }
1273 case NL80211_IFTYPE_AP:
1274 sdata->bss = &sdata->u.ap;
1275 break;
1276 case NL80211_IFTYPE_MESH_POINT:
1277 case NL80211_IFTYPE_STATION:
1278 case NL80211_IFTYPE_MONITOR:
1279 case NL80211_IFTYPE_ADHOC:
1280 case NL80211_IFTYPE_P2P_DEVICE:
1281 case NL80211_IFTYPE_OCB:
1282 case NL80211_IFTYPE_NAN:
1283 /* no special treatment */
1284 break;
1285 case NL80211_IFTYPE_UNSPECIFIED:
1286 case NUM_NL80211_IFTYPES:
1287 case NL80211_IFTYPE_P2P_CLIENT:
1288 case NL80211_IFTYPE_P2P_GO:
1289 case NL80211_IFTYPE_WDS:
1290 /* cannot happen */
1291 WARN_ON(1);
1292 break;
1293 }
1294
1295 if (local->open_count == 0) {
1296 /* here we can consider everything in good order (again) */
1297 local->reconfig_failure = false;
1298
1299 res = drv_start(local);
1300 if (res)
1301 goto err_del_bss;
1302 ieee80211_led_radio(local, true);
1303 ieee80211_mod_tpt_led_trig(local,
1304 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1305 }
1306
1307 /*
1308 * Copy the hopefully now-present MAC address to
1309 * this interface, if it has the special null one.
1310 */
1311 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1312 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1313 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1314
1315 if (!is_valid_ether_addr(dev->dev_addr)) {
1316 res = -EADDRNOTAVAIL;
1317 goto err_stop;
1318 }
1319 }
1320
1321 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
1322 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
1323 switch (sdata->vif.type) {
1324 case NL80211_IFTYPE_AP_VLAN:
1325 /* no need to tell driver, but set carrier and chanctx */
1326 if (sdata->bss->active) {
1327 ieee80211_link_vlan_copy_chanctx(&sdata->deflink);
1328 netif_carrier_on(dev);
1329 ieee80211_set_vif_encap_ops(sdata);
1330 } else {
1331 netif_carrier_off(dev);
1332 }
1333 break;
1334 case NL80211_IFTYPE_MONITOR:
1335 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1336 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
1337 res = drv_add_interface(local, sdata);
1338 if (res)
1339 goto err_stop;
1340 } else {
1341 if (local->virt_monitors == 0 && local->open_count == 0) {
1342 res = ieee80211_add_virtual_monitor(local);
1343 if (res)
1344 goto err_stop;
1345 }
1346 local->virt_monitors++;
1347
1348 /* must be before the call to ieee80211_configure_filter */
1349 if (local->virt_monitors == 1) {
1350 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1351 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1352 }
1353 }
1354
1355 local->monitors++;
1356
1357 ieee80211_adjust_monitor_flags(sdata, 1);
1358 ieee80211_configure_filter(local);
1359 ieee80211_recalc_offload(local);
1360 ieee80211_recalc_idle(local);
1361
1362 netif_carrier_on(dev);
1363 break;
1364 default:
1365 if (coming_up) {
1366 ieee80211_del_virtual_monitor(local);
1367 ieee80211_set_sdata_offload_flags(sdata);
1368
1369 res = drv_add_interface(local, sdata);
1370 if (res)
1371 goto err_stop;
1372
1373 ieee80211_set_vif_encap_ops(sdata);
1374 res = ieee80211_check_queues(sdata,
1375 ieee80211_vif_type_p2p(&sdata->vif));
1376 if (res)
1377 goto err_del_interface;
1378 }
1379
1380 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1381 local->fif_pspoll++;
1382 local->fif_probe_req++;
1383
1384 ieee80211_configure_filter(local);
1385 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1386 local->fif_probe_req++;
1387 }
1388
1389 if (sdata->vif.probe_req_reg)
1390 drv_config_iface_filter(local, sdata,
1391 FIF_PROBE_REQ,
1392 FIF_PROBE_REQ);
1393
1394 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1395 sdata->vif.type != NL80211_IFTYPE_NAN)
1396 changed |= ieee80211_reset_erp_info(sdata);
1397 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1398 changed);
1399
1400 switch (sdata->vif.type) {
1401 case NL80211_IFTYPE_STATION:
1402 case NL80211_IFTYPE_ADHOC:
1403 case NL80211_IFTYPE_AP:
1404 case NL80211_IFTYPE_MESH_POINT:
1405 case NL80211_IFTYPE_OCB:
1406 netif_carrier_off(dev);
1407 break;
1408 case NL80211_IFTYPE_P2P_DEVICE:
1409 case NL80211_IFTYPE_NAN:
1410 break;
1411 default:
1412 /* not reached */
1413 WARN_ON(1);
1414 }
1415
1416 /*
1417 * Set default queue parameters so drivers don't
1418 * need to initialise the hardware if the hardware
1419 * doesn't start up with sane defaults.
1420 * Enable QoS for anything but station interfaces.
1421 */
1422 ieee80211_set_wmm_default(&sdata->deflink, true,
1423 sdata->vif.type != NL80211_IFTYPE_STATION);
1424 }
1425
1426 switch (sdata->vif.type) {
1427 case NL80211_IFTYPE_P2P_DEVICE:
1428 rcu_assign_pointer(local->p2p_sdata, sdata);
1429 break;
1430 case NL80211_IFTYPE_MONITOR:
1431 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1432 break;
1433 default:
1434 break;
1435 }
1436
1437 /*
1438 * set_multicast_list will be invoked by the networking core
1439 * which will check whether any increments here were done in
1440 * error and sync them down to the hardware as filter flags.
1441 */
1442 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1443 atomic_inc(&local->iff_allmultis);
1444
1445 if (coming_up)
1446 local->open_count++;
1447
1448 if (local->open_count == 1)
1449 ieee80211_hw_conf_init(local);
1450 else if (hw_reconf_flags)
1451 ieee80211_hw_config(local, hw_reconf_flags);
1452
1453 ieee80211_recalc_ps(local);
1454
1455 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1456
1457 return 0;
1458 err_del_interface:
1459 drv_remove_interface(local, sdata);
1460 err_stop:
1461 if (!local->open_count)
1462 drv_stop(local, false);
1463 err_del_bss:
1464 sdata->bss = NULL;
1465 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1466 list_del(&sdata->u.vlan.list);
1467 /* might already be clear but that doesn't matter */
1468 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1469 return res;
1470 }
1471
ieee80211_if_setup(struct net_device * dev)1472 static void ieee80211_if_setup(struct net_device *dev)
1473 {
1474 ether_setup(dev);
1475 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1476 dev->priv_flags |= IFF_NO_QUEUE;
1477 dev->netdev_ops = &ieee80211_dataif_ops;
1478 dev->needs_free_netdev = true;
1479 }
1480
ieee80211_iface_process_skb(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1481 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1482 struct ieee80211_sub_if_data *sdata,
1483 struct sk_buff *skb)
1484 {
1485 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1486
1487 lockdep_assert_wiphy(local->hw.wiphy);
1488
1489 if (ieee80211_is_action(mgmt->frame_control) &&
1490 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1491 struct sta_info *sta;
1492 int len = skb->len;
1493
1494 sta = sta_info_get_bss(sdata, mgmt->sa);
1495 if (sta) {
1496 switch (mgmt->u.action.u.addba_req.action_code) {
1497 case WLAN_ACTION_ADDBA_REQ:
1498 ieee80211_process_addba_request(local, sta,
1499 mgmt, len);
1500 break;
1501 case WLAN_ACTION_ADDBA_RESP:
1502 ieee80211_process_addba_resp(local, sta,
1503 mgmt, len);
1504 break;
1505 case WLAN_ACTION_DELBA:
1506 ieee80211_process_delba(sdata, sta,
1507 mgmt, len);
1508 break;
1509 default:
1510 WARN_ON(1);
1511 break;
1512 }
1513 }
1514 } else if (ieee80211_is_action(mgmt->frame_control) &&
1515 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1516 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1517 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1518 struct ieee80211_rx_status *status;
1519 enum nl80211_band band;
1520 struct sta_info *sta;
1521 u8 opmode;
1522
1523 status = IEEE80211_SKB_RXCB(skb);
1524 band = status->band;
1525 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1526
1527 sta = sta_info_get_bss(sdata, mgmt->sa);
1528
1529 if (sta)
1530 ieee80211_vht_handle_opmode(sdata,
1531 &sta->deflink,
1532 opmode, band);
1533
1534 break;
1535 }
1536 case WLAN_VHT_ACTION_GROUPID_MGMT:
1537 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1538 mgmt);
1539 break;
1540 default:
1541 WARN_ON(1);
1542 break;
1543 }
1544 } else if (ieee80211_is_action(mgmt->frame_control) &&
1545 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1546 switch (mgmt->u.action.u.s1g.action_code) {
1547 case WLAN_S1G_TWT_TEARDOWN:
1548 case WLAN_S1G_TWT_SETUP:
1549 ieee80211_s1g_rx_twt_action(sdata, skb);
1550 break;
1551 default:
1552 break;
1553 }
1554 } else if (ieee80211_is_action(mgmt->frame_control) &&
1555 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) {
1556 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1557 switch (mgmt->u.action.u.ttlm_req.action_code) {
1558 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
1559 ieee80211_process_neg_ttlm_req(sdata, mgmt,
1560 skb->len);
1561 break;
1562 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
1563 ieee80211_process_neg_ttlm_res(sdata, mgmt,
1564 skb->len);
1565 break;
1566 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
1567 ieee80211_process_ttlm_teardown(sdata);
1568 break;
1569 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
1570 ieee80211_process_ml_reconf_resp(sdata, mgmt,
1571 skb->len);
1572 break;
1573 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
1574 ieee80211_process_epcs_ena_resp(sdata, mgmt,
1575 skb->len);
1576 break;
1577 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
1578 ieee80211_process_epcs_teardown(sdata, mgmt,
1579 skb->len);
1580 break;
1581 default:
1582 break;
1583 }
1584 }
1585 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1586 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1587 ieee80211_sta_rx_queued_ext(sdata, skb);
1588 else
1589 WARN_ON(1);
1590 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1591 struct ieee80211_hdr *hdr = (void *)mgmt;
1592 struct sta_info *sta;
1593
1594 /*
1595 * So the frame isn't mgmt, but frame_control
1596 * is at the right place anyway, of course, so
1597 * the if statement is correct.
1598 *
1599 * Warn if we have other data frame types here,
1600 * they must not get here.
1601 */
1602 WARN_ON(hdr->frame_control &
1603 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1604 WARN_ON(!(hdr->seq_ctrl &
1605 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1606 /*
1607 * This was a fragment of a frame, received while
1608 * a block-ack session was active. That cannot be
1609 * right, so terminate the session.
1610 */
1611 sta = sta_info_get_bss(sdata, mgmt->sa);
1612 if (sta) {
1613 u16 tid = ieee80211_get_tid(hdr);
1614
1615 __ieee80211_stop_rx_ba_session(
1616 sta, tid, WLAN_BACK_RECIPIENT,
1617 WLAN_REASON_QSTA_REQUIRE_SETUP,
1618 true);
1619 }
1620 } else switch (sdata->vif.type) {
1621 case NL80211_IFTYPE_STATION:
1622 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1623 break;
1624 case NL80211_IFTYPE_ADHOC:
1625 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1626 break;
1627 case NL80211_IFTYPE_MESH_POINT:
1628 if (!ieee80211_vif_is_mesh(&sdata->vif))
1629 break;
1630 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1631 break;
1632 default:
1633 WARN(1, "frame for unexpected interface type");
1634 break;
1635 }
1636 }
1637
ieee80211_iface_process_status(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1638 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1639 struct sk_buff *skb)
1640 {
1641 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1642
1643 if (ieee80211_is_action(mgmt->frame_control) &&
1644 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1645 switch (mgmt->u.action.u.s1g.action_code) {
1646 case WLAN_S1G_TWT_TEARDOWN:
1647 case WLAN_S1G_TWT_SETUP:
1648 ieee80211_s1g_status_twt_action(sdata, skb);
1649 break;
1650 default:
1651 break;
1652 }
1653 }
1654 }
1655
ieee80211_iface_work(struct wiphy * wiphy,struct wiphy_work * work)1656 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1657 {
1658 struct ieee80211_sub_if_data *sdata =
1659 container_of(work, struct ieee80211_sub_if_data, work);
1660 struct ieee80211_local *local = sdata->local;
1661 struct sk_buff *skb;
1662
1663 if (!ieee80211_sdata_running(sdata))
1664 return;
1665
1666 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1667 return;
1668
1669 if (!ieee80211_can_run_worker(local))
1670 return;
1671
1672 /* first process frames */
1673 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1674 kcov_remote_start_common(skb_get_kcov_handle(skb));
1675
1676 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1677 ieee80211_process_tdls_channel_switch(sdata, skb);
1678 else
1679 ieee80211_iface_process_skb(local, sdata, skb);
1680
1681 kfree_skb(skb);
1682 kcov_remote_stop();
1683 }
1684
1685 /* process status queue */
1686 while ((skb = skb_dequeue(&sdata->status_queue))) {
1687 kcov_remote_start_common(skb_get_kcov_handle(skb));
1688
1689 ieee80211_iface_process_status(sdata, skb);
1690 kfree_skb(skb);
1691
1692 kcov_remote_stop();
1693 }
1694
1695 /* then other type-dependent work */
1696 switch (sdata->vif.type) {
1697 case NL80211_IFTYPE_STATION:
1698 ieee80211_sta_work(sdata);
1699 break;
1700 case NL80211_IFTYPE_ADHOC:
1701 ieee80211_ibss_work(sdata);
1702 break;
1703 case NL80211_IFTYPE_MESH_POINT:
1704 if (!ieee80211_vif_is_mesh(&sdata->vif))
1705 break;
1706 ieee80211_mesh_work(sdata);
1707 break;
1708 case NL80211_IFTYPE_OCB:
1709 ieee80211_ocb_work(sdata);
1710 break;
1711 default:
1712 break;
1713 }
1714 }
1715
ieee80211_activate_links_work(struct wiphy * wiphy,struct wiphy_work * work)1716 static void ieee80211_activate_links_work(struct wiphy *wiphy,
1717 struct wiphy_work *work)
1718 {
1719 struct ieee80211_sub_if_data *sdata =
1720 container_of(work, struct ieee80211_sub_if_data,
1721 activate_links_work);
1722 struct ieee80211_local *local = wiphy_priv(wiphy);
1723
1724 if (local->in_reconfig)
1725 return;
1726
1727 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1728 sdata->desired_active_links = 0;
1729 }
1730
1731 /*
1732 * Helper function to initialise an interface to a specific type.
1733 */
ieee80211_setup_sdata(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1734 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1735 enum nl80211_iftype type)
1736 {
1737 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1738 0xff, 0xff, 0xff};
1739
1740 /* clear type-dependent unions */
1741 memset(&sdata->u, 0, sizeof(sdata->u));
1742 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1743
1744 /* and set some type-dependent values */
1745 sdata->vif.type = type;
1746 sdata->vif.p2p = false;
1747 sdata->wdev.iftype = type;
1748
1749 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1750 sdata->control_port_no_encrypt = false;
1751 sdata->control_port_over_nl80211 = false;
1752 sdata->control_port_no_preauth = false;
1753 sdata->vif.cfg.idle = true;
1754 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1755
1756 sdata->noack_map = 0;
1757
1758 /* only monitor/p2p-device differ */
1759 if (sdata->dev) {
1760 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1761 sdata->dev->type = ARPHRD_ETHER;
1762 }
1763
1764 skb_queue_head_init(&sdata->skb_queue);
1765 skb_queue_head_init(&sdata->status_queue);
1766 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1767 wiphy_work_init(&sdata->activate_links_work,
1768 ieee80211_activate_links_work);
1769
1770 switch (type) {
1771 case NL80211_IFTYPE_P2P_GO:
1772 type = NL80211_IFTYPE_AP;
1773 sdata->vif.type = type;
1774 sdata->vif.p2p = true;
1775 fallthrough;
1776 case NL80211_IFTYPE_AP:
1777 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1778 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1779 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1780 break;
1781 case NL80211_IFTYPE_P2P_CLIENT:
1782 type = NL80211_IFTYPE_STATION;
1783 sdata->vif.type = type;
1784 sdata->vif.p2p = true;
1785 fallthrough;
1786 case NL80211_IFTYPE_STATION:
1787 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1788 ieee80211_sta_setup_sdata(sdata);
1789 break;
1790 case NL80211_IFTYPE_OCB:
1791 sdata->vif.bss_conf.bssid = bssid_wildcard;
1792 ieee80211_ocb_setup_sdata(sdata);
1793 break;
1794 case NL80211_IFTYPE_ADHOC:
1795 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1796 ieee80211_ibss_setup_sdata(sdata);
1797 break;
1798 case NL80211_IFTYPE_MESH_POINT:
1799 if (ieee80211_vif_is_mesh(&sdata->vif))
1800 ieee80211_mesh_init_sdata(sdata);
1801 break;
1802 case NL80211_IFTYPE_MONITOR:
1803 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1804 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1805 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1806 MONITOR_FLAG_OTHER_BSS;
1807 break;
1808 case NL80211_IFTYPE_NAN:
1809 idr_init(&sdata->u.nan.function_inst_ids);
1810 spin_lock_init(&sdata->u.nan.func_lock);
1811 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1812 break;
1813 case NL80211_IFTYPE_AP_VLAN:
1814 case NL80211_IFTYPE_P2P_DEVICE:
1815 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1816 break;
1817 case NL80211_IFTYPE_UNSPECIFIED:
1818 case NL80211_IFTYPE_WDS:
1819 case NUM_NL80211_IFTYPES:
1820 WARN_ON(1);
1821 break;
1822 }
1823
1824 /* need to do this after the switch so vif.type is correct */
1825 ieee80211_link_setup(&sdata->deflink);
1826
1827 ieee80211_debugfs_recreate_netdev(sdata, false);
1828 }
1829
ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1830 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1831 enum nl80211_iftype type)
1832 {
1833 struct ieee80211_local *local = sdata->local;
1834 int ret, err;
1835 enum nl80211_iftype internal_type = type;
1836 bool p2p = false;
1837
1838 ASSERT_RTNL();
1839
1840 if (!local->ops->change_interface)
1841 return -EBUSY;
1842
1843 /* for now, don't support changing while links exist */
1844 if (ieee80211_vif_is_mld(&sdata->vif))
1845 return -EBUSY;
1846
1847 switch (sdata->vif.type) {
1848 case NL80211_IFTYPE_AP:
1849 if (!list_empty(&sdata->u.ap.vlans))
1850 return -EBUSY;
1851 break;
1852 case NL80211_IFTYPE_STATION:
1853 case NL80211_IFTYPE_ADHOC:
1854 case NL80211_IFTYPE_OCB:
1855 /*
1856 * Could maybe also all others here?
1857 * Just not sure how that interacts
1858 * with the RX/config path e.g. for
1859 * mesh.
1860 */
1861 break;
1862 default:
1863 return -EBUSY;
1864 }
1865
1866 switch (type) {
1867 case NL80211_IFTYPE_AP:
1868 case NL80211_IFTYPE_STATION:
1869 case NL80211_IFTYPE_ADHOC:
1870 case NL80211_IFTYPE_OCB:
1871 /*
1872 * Could probably support everything
1873 * but here.
1874 */
1875 break;
1876 case NL80211_IFTYPE_P2P_CLIENT:
1877 p2p = true;
1878 internal_type = NL80211_IFTYPE_STATION;
1879 break;
1880 case NL80211_IFTYPE_P2P_GO:
1881 p2p = true;
1882 internal_type = NL80211_IFTYPE_AP;
1883 break;
1884 default:
1885 return -EBUSY;
1886 }
1887
1888 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1889 if (ret)
1890 return ret;
1891
1892 ieee80211_stop_vif_queues(local, sdata,
1893 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1894 /* do_stop will synchronize_rcu() first thing */
1895 ieee80211_do_stop(sdata, false);
1896
1897 ieee80211_teardown_sdata(sdata);
1898
1899 ieee80211_set_sdata_offload_flags(sdata);
1900 ret = drv_change_interface(local, sdata, internal_type, p2p);
1901 if (ret)
1902 type = ieee80211_vif_type_p2p(&sdata->vif);
1903
1904 /*
1905 * Ignore return value here, there's not much we can do since
1906 * the driver changed the interface type internally already.
1907 * The warnings will hopefully make driver authors fix it :-)
1908 */
1909 ieee80211_check_queues(sdata, type);
1910
1911 ieee80211_setup_sdata(sdata, type);
1912 ieee80211_set_vif_encap_ops(sdata);
1913
1914 err = ieee80211_do_open(&sdata->wdev, false);
1915 WARN(err, "type change: do_open returned %d", err);
1916
1917 ieee80211_wake_vif_queues(local, sdata,
1918 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1919 return ret;
1920 }
1921
ieee80211_if_change_type(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1922 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1923 enum nl80211_iftype type)
1924 {
1925 int ret;
1926
1927 ASSERT_RTNL();
1928
1929 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1930 return 0;
1931
1932 if (ieee80211_sdata_running(sdata)) {
1933 ret = ieee80211_runtime_change_iftype(sdata, type);
1934 if (ret)
1935 return ret;
1936 } else {
1937 /* Purge and reset type-dependent state. */
1938 ieee80211_teardown_sdata(sdata);
1939 ieee80211_setup_sdata(sdata, type);
1940 }
1941
1942 /* reset some values that shouldn't be kept across type changes */
1943 if (type == NL80211_IFTYPE_STATION)
1944 sdata->u.mgd.use_4addr = false;
1945
1946 return 0;
1947 }
1948
ieee80211_assign_perm_addr(struct ieee80211_local * local,u8 * perm_addr,enum nl80211_iftype type)1949 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1950 u8 *perm_addr, enum nl80211_iftype type)
1951 {
1952 struct ieee80211_sub_if_data *sdata;
1953 u64 mask, start, addr, val, inc;
1954 u8 *m;
1955 u8 tmp_addr[ETH_ALEN];
1956 int i;
1957
1958 lockdep_assert_wiphy(local->hw.wiphy);
1959
1960 /* default ... something at least */
1961 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1962
1963 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1964 local->hw.wiphy->n_addresses <= 1)
1965 return;
1966
1967 switch (type) {
1968 case NL80211_IFTYPE_MONITOR:
1969 /* doesn't matter */
1970 break;
1971 case NL80211_IFTYPE_AP_VLAN:
1972 /* match up with an AP interface */
1973 list_for_each_entry(sdata, &local->interfaces, list) {
1974 if (sdata->vif.type != NL80211_IFTYPE_AP)
1975 continue;
1976 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1977 break;
1978 }
1979 /* keep default if no AP interface present */
1980 break;
1981 case NL80211_IFTYPE_P2P_CLIENT:
1982 case NL80211_IFTYPE_P2P_GO:
1983 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1984 list_for_each_entry(sdata, &local->interfaces, list) {
1985 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1986 continue;
1987 if (!ieee80211_sdata_running(sdata))
1988 continue;
1989 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1990 return;
1991 }
1992 }
1993 fallthrough;
1994 default:
1995 /* assign a new address if possible -- try n_addresses first */
1996 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1997 bool used = false;
1998
1999 list_for_each_entry(sdata, &local->interfaces, list) {
2000 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
2001 sdata->vif.addr)) {
2002 used = true;
2003 break;
2004 }
2005 }
2006
2007 if (!used) {
2008 memcpy(perm_addr,
2009 local->hw.wiphy->addresses[i].addr,
2010 ETH_ALEN);
2011 break;
2012 }
2013 }
2014
2015 /* try mask if available */
2016 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
2017 break;
2018
2019 m = local->hw.wiphy->addr_mask;
2020 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2021 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2022 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2023
2024 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
2025 /* not a contiguous mask ... not handled now! */
2026 pr_info("not contiguous\n");
2027 break;
2028 }
2029
2030 /*
2031 * Pick address of existing interface in case user changed
2032 * MAC address manually, default to perm_addr.
2033 */
2034 m = local->hw.wiphy->perm_addr;
2035 list_for_each_entry(sdata, &local->interfaces, list) {
2036 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2037 continue;
2038 m = sdata->vif.addr;
2039 break;
2040 }
2041 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2042 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2043 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2044
2045 inc = 1ULL<<__ffs64(mask);
2046 val = (start & mask);
2047 addr = (start & ~mask) | (val & mask);
2048 do {
2049 bool used = false;
2050
2051 tmp_addr[5] = addr >> 0*8;
2052 tmp_addr[4] = addr >> 1*8;
2053 tmp_addr[3] = addr >> 2*8;
2054 tmp_addr[2] = addr >> 3*8;
2055 tmp_addr[1] = addr >> 4*8;
2056 tmp_addr[0] = addr >> 5*8;
2057
2058 val += inc;
2059
2060 list_for_each_entry(sdata, &local->interfaces, list) {
2061 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2062 used = true;
2063 break;
2064 }
2065 }
2066
2067 if (!used) {
2068 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2069 break;
2070 }
2071 addr = (start & ~mask) | (val & mask);
2072 } while (addr != start);
2073
2074 break;
2075 }
2076 }
2077
ieee80211_if_add(struct ieee80211_local * local,const char * name,unsigned char name_assign_type,struct wireless_dev ** new_wdev,enum nl80211_iftype type,struct vif_params * params)2078 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2079 unsigned char name_assign_type,
2080 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2081 struct vif_params *params)
2082 {
2083 struct net_device *ndev = NULL;
2084 struct ieee80211_sub_if_data *sdata = NULL;
2085 struct txq_info *txqi;
2086 int ret, i;
2087
2088 ASSERT_RTNL();
2089 lockdep_assert_wiphy(local->hw.wiphy);
2090
2091 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2092 struct wireless_dev *wdev;
2093
2094 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2095 GFP_KERNEL);
2096 if (!sdata)
2097 return -ENOMEM;
2098 wdev = &sdata->wdev;
2099
2100 sdata->dev = NULL;
2101 strscpy(sdata->name, name, IFNAMSIZ);
2102 ieee80211_assign_perm_addr(local, wdev->address, type);
2103 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2104 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2105 } else {
2106 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2107 sizeof(void *));
2108 int txq_size = 0;
2109
2110 if (type != NL80211_IFTYPE_AP_VLAN &&
2111 (type != NL80211_IFTYPE_MONITOR ||
2112 (params->flags & MONITOR_FLAG_ACTIVE)))
2113 txq_size += sizeof(struct txq_info) +
2114 local->hw.txq_data_size;
2115
2116 ndev = alloc_netdev_mqs(size + txq_size,
2117 name, name_assign_type,
2118 ieee80211_if_setup, 1, 1);
2119 if (!ndev)
2120 return -ENOMEM;
2121
2122 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2123
2124 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2125
2126 ndev->needed_headroom = local->tx_headroom +
2127 4*6 /* four MAC addresses */
2128 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2129 + 6 /* mesh */
2130 + 8 /* rfc1042/bridge tunnel */
2131 - ETH_HLEN /* ethernet hard_header_len */
2132 + IEEE80211_ENCRYPT_HEADROOM;
2133 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2134
2135 ret = dev_alloc_name(ndev, ndev->name);
2136 if (ret < 0) {
2137 free_netdev(ndev);
2138 return ret;
2139 }
2140
2141 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2142 if (is_valid_ether_addr(params->macaddr))
2143 eth_hw_addr_set(ndev, params->macaddr);
2144 else
2145 eth_hw_addr_set(ndev, ndev->perm_addr);
2146 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2147
2148 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2149 sdata = netdev_priv(ndev);
2150 ndev->ieee80211_ptr = &sdata->wdev;
2151 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2152 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2153 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2154
2155 if (txq_size) {
2156 txqi = netdev_priv(ndev) + size;
2157 ieee80211_txq_init(sdata, NULL, txqi, 0);
2158 }
2159
2160 sdata->dev = ndev;
2161 }
2162
2163 /* initialise type-independent data */
2164 sdata->wdev.wiphy = local->hw.wiphy;
2165
2166 ieee80211_sdata_init(local, sdata);
2167
2168 ieee80211_init_frag_cache(&sdata->frags);
2169
2170 INIT_LIST_HEAD(&sdata->key_list);
2171
2172 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
2173 ieee80211_delayed_tailroom_dec);
2174
2175 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2176 struct ieee80211_supported_band *sband;
2177 sband = local->hw.wiphy->bands[i];
2178 sdata->rc_rateidx_mask[i] =
2179 sband ? (1 << sband->n_bitrates) - 1 : 0;
2180 if (sband) {
2181 __le16 cap;
2182 u16 *vht_rate_mask;
2183
2184 memcpy(sdata->rc_rateidx_mcs_mask[i],
2185 sband->ht_cap.mcs.rx_mask,
2186 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2187
2188 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2189 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2190 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2191 } else {
2192 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2193 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2194 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2195 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2196 }
2197 }
2198
2199 ieee80211_set_default_queues(sdata);
2200
2201 /* setup type-dependent data */
2202 ieee80211_setup_sdata(sdata, type);
2203
2204 if (ndev) {
2205 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2206 if (type == NL80211_IFTYPE_STATION)
2207 sdata->u.mgd.use_4addr = params->use_4addr;
2208
2209 ndev->features |= local->hw.netdev_features;
2210 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2211 ndev->hw_features |= ndev->features &
2212 MAC80211_SUPPORTED_FEATURES_TX;
2213 sdata->vif.netdev_features = local->hw.netdev_features;
2214
2215 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2216
2217 /* MTU range is normally 256 - 2304, where the upper limit is
2218 * the maximum MSDU size. Monitor interfaces send and receive
2219 * MPDU and A-MSDU frames which may be much larger so we do
2220 * not impose an upper limit in that case.
2221 */
2222 ndev->min_mtu = 256;
2223 if (type == NL80211_IFTYPE_MONITOR)
2224 ndev->max_mtu = 0;
2225 else
2226 ndev->max_mtu = local->hw.max_mtu;
2227
2228 ret = cfg80211_register_netdevice(ndev);
2229 if (ret) {
2230 free_netdev(ndev);
2231 return ret;
2232 }
2233 }
2234
2235 mutex_lock(&local->iflist_mtx);
2236 list_add_tail_rcu(&sdata->list, &local->interfaces);
2237 mutex_unlock(&local->iflist_mtx);
2238
2239 if (new_wdev)
2240 *new_wdev = &sdata->wdev;
2241
2242 return 0;
2243 }
2244
ieee80211_if_remove(struct ieee80211_sub_if_data * sdata)2245 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2246 {
2247 ASSERT_RTNL();
2248 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2249
2250 mutex_lock(&sdata->local->iflist_mtx);
2251 list_del_rcu(&sdata->list);
2252 mutex_unlock(&sdata->local->iflist_mtx);
2253
2254 if (sdata->vif.txq)
2255 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2256
2257 synchronize_rcu();
2258
2259 cfg80211_unregister_wdev(&sdata->wdev);
2260
2261 if (!sdata->dev) {
2262 ieee80211_teardown_sdata(sdata);
2263 kfree(sdata);
2264 }
2265 }
2266
ieee80211_sdata_stop(struct ieee80211_sub_if_data * sdata)2267 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2268 {
2269 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2270 return;
2271 ieee80211_do_stop(sdata, true);
2272 }
2273
ieee80211_remove_interfaces(struct ieee80211_local * local)2274 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2275 {
2276 struct ieee80211_sub_if_data *sdata, *tmp;
2277 LIST_HEAD(unreg_list);
2278
2279 ASSERT_RTNL();
2280
2281 /* Before destroying the interfaces, make sure they're all stopped so
2282 * that the hardware is stopped. Otherwise, the driver might still be
2283 * iterating the interfaces during the shutdown, e.g. from a worker
2284 * or from RX processing or similar, and if it does so (using atomic
2285 * iteration) while we're manipulating the list, the iteration will
2286 * crash.
2287 *
2288 * After this, the hardware should be stopped and the driver should
2289 * have stopped all of its activities, so that we can do RCU-unaware
2290 * manipulations of the interface list below.
2291 */
2292 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2293
2294 guard(wiphy)(local->hw.wiphy);
2295
2296 WARN(local->open_count, "%s: open count remains %d\n",
2297 wiphy_name(local->hw.wiphy), local->open_count);
2298
2299 mutex_lock(&local->iflist_mtx);
2300 list_splice_init(&local->interfaces, &unreg_list);
2301 mutex_unlock(&local->iflist_mtx);
2302
2303 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2304 bool netdev = sdata->dev;
2305
2306 /*
2307 * Remove IP addresses explicitly, since the notifier will
2308 * skip the callbacks if wdev->registered is false, since
2309 * we can't acquire the wiphy_lock() again there if already
2310 * inside this locked section.
2311 */
2312 sdata->vif.cfg.arp_addr_cnt = 0;
2313 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2314 sdata->u.mgd.associated)
2315 ieee80211_vif_cfg_change_notify(sdata,
2316 BSS_CHANGED_ARP_FILTER);
2317
2318 list_del(&sdata->list);
2319 cfg80211_unregister_wdev(&sdata->wdev);
2320
2321 if (!netdev)
2322 kfree(sdata);
2323 }
2324 }
2325
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)2326 static int netdev_notify(struct notifier_block *nb,
2327 unsigned long state, void *ptr)
2328 {
2329 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2330 struct ieee80211_sub_if_data *sdata;
2331
2332 if (state != NETDEV_CHANGENAME)
2333 return NOTIFY_DONE;
2334
2335 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2336 return NOTIFY_DONE;
2337
2338 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2339 return NOTIFY_DONE;
2340
2341 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2342 memcpy(sdata->name, dev->name, IFNAMSIZ);
2343 ieee80211_debugfs_rename_netdev(sdata);
2344
2345 return NOTIFY_OK;
2346 }
2347
2348 static struct notifier_block mac80211_netdev_notifier = {
2349 .notifier_call = netdev_notify,
2350 };
2351
ieee80211_iface_init(void)2352 int ieee80211_iface_init(void)
2353 {
2354 return register_netdevice_notifier(&mac80211_netdev_notifier);
2355 }
2356
ieee80211_iface_exit(void)2357 void ieee80211_iface_exit(void)
2358 {
2359 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2360 }
2361
ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data * sdata)2362 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2363 {
2364 if (sdata->vif.type == NL80211_IFTYPE_AP)
2365 atomic_inc(&sdata->u.ap.num_mcast_sta);
2366 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2367 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2368 }
2369
ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data * sdata)2370 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2371 {
2372 if (sdata->vif.type == NL80211_IFTYPE_AP)
2373 atomic_dec(&sdata->u.ap.num_mcast_sta);
2374 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2375 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2376 }
2377
ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data * sdata)2378 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
2379 {
2380 struct ieee80211_local *local = sdata->local;
2381
2382 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
2383 return;
2384
2385 ieee80211_stop_vif_queues_norefcount(local, sdata,
2386 IEEE80211_QUEUE_STOP_REASON_CSA);
2387 }
2388
ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data * sdata)2389 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
2390 {
2391 struct ieee80211_local *local = sdata->local;
2392
2393 ieee80211_wake_vif_queues_norefcount(local, sdata,
2394 IEEE80211_QUEUE_STOP_REASON_CSA);
2395 }
2396