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
45static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work);
46
47bool __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(chandef: &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
76void 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(sdata: link->sdata)))
81 ieee80211_link_info_change_notify(sdata: link->sdata, link,
82 changed: BSS_CHANGED_TXPOWER);
83}
84
85static 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
94static 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, drop: false);
100
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
103}
104
105static 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(head: &local->chanctx_list) ||
116 local->monitors;
117
118 working = !local->ops->remain_on_channel &&
119 !list_empty(head: &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, types_on: led_trig_start, types_off: led_trig_stop);
143
144 if (working || scanning || active)
145 return __ieee80211_idle_off(local);
146 return __ieee80211_idle_on(local);
147}
148
149u32 ieee80211_idle_off(struct ieee80211_local *local)
150{
151 return __ieee80211_recalc_idle(local, force_active: true);
152}
153
154void ieee80211_recalc_idle(struct ieee80211_local *local)
155{
156 u32 change = __ieee80211_recalc_idle(local, force_active: false);
157 if (change)
158 ieee80211_hw_config(local, radio_idx: -1, changed: change);
159}
160
161static 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(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
210static 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(dev: sdata->dev))
224 return -EBUSY;
225
226 /* First check no ROC work is happening on this iface */
227 list_for_each_entry(roc, &local->roc_list, list) {
228 if (roc->sdata != sdata)
229 continue;
230
231 if (roc->started) {
232 ret = -EBUSY;
233 goto unlock;
234 }
235 }
236
237 /* And if this iface is scanning */
238 if (local->scanning) {
239 scan_sdata = rcu_dereference_protected(local->scan_sdata,
240 lockdep_is_held(&local->hw.wiphy->mtx));
241 if (sdata == scan_sdata)
242 ret = -EBUSY;
243 }
244
245 switch (sdata->vif.type) {
246 case NL80211_IFTYPE_STATION:
247 case NL80211_IFTYPE_P2P_CLIENT:
248 /* More interface types could be added here but changing the
249 * address while powered makes the most sense in client modes.
250 */
251 break;
252 default:
253 ret = -EOPNOTSUPP;
254 }
255
256unlock:
257 return ret;
258}
259
260static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata,
261 void *addr)
262{
263 struct ieee80211_local *local = sdata->local;
264 struct sockaddr *sa = addr;
265 bool check_dup = true;
266 bool live = false;
267 int ret;
268
269 if (ieee80211_sdata_running(sdata)) {
270 ret = ieee80211_can_powered_addr_change(sdata);
271 if (ret)
272 return ret;
273
274 live = true;
275 }
276
277 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
278 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
279 check_dup = false;
280
281 ret = ieee80211_verify_mac(sdata, addr: sa->sa_data, check_dup);
282 if (ret)
283 return ret;
284
285 if (live)
286 drv_remove_interface(local, sdata);
287 ret = eth_mac_addr(dev: sdata->dev, p: sa);
288
289 if (ret == 0) {
290 memcpy(to: sdata->vif.addr, from: sa->sa_data, ETH_ALEN);
291 ether_addr_copy(dst: sdata->vif.bss_conf.addr, src: sdata->vif.addr);
292 }
293
294 /* Regardless of eth_mac_addr() return we still want to add the
295 * interface back. This should not fail...
296 */
297 if (live)
298 WARN_ON(drv_add_interface(local, sdata));
299
300 return ret;
301}
302
303static int ieee80211_change_mac(struct net_device *dev, void *addr)
304{
305 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
306 struct ieee80211_local *local = sdata->local;
307
308 /*
309 * This happens during unregistration if there's a bond device
310 * active (maybe other cases?) and we must get removed from it.
311 * But we really don't care anymore if it's not registered now.
312 */
313 if (!dev->ieee80211_ptr->registered)
314 return 0;
315
316 guard(wiphy)(T: local->hw.wiphy);
317
318 return _ieee80211_change_mac(sdata, addr);
319}
320
321static inline int identical_mac_addr_allowed(int type1, int type2)
322{
323 return type1 == NL80211_IFTYPE_MONITOR ||
324 type2 == NL80211_IFTYPE_MONITOR ||
325 type1 == NL80211_IFTYPE_P2P_DEVICE ||
326 type2 == NL80211_IFTYPE_P2P_DEVICE ||
327 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
328 (type1 == NL80211_IFTYPE_AP_VLAN &&
329 (type2 == NL80211_IFTYPE_AP ||
330 type2 == NL80211_IFTYPE_AP_VLAN));
331}
332
333static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
334 enum nl80211_iftype iftype)
335{
336 struct ieee80211_local *local = sdata->local;
337 struct ieee80211_sub_if_data *nsdata;
338
339 ASSERT_RTNL();
340 lockdep_assert_wiphy(local->hw.wiphy);
341
342 /* we hold the RTNL here so can safely walk the list */
343 list_for_each_entry(nsdata, &local->interfaces, list) {
344 if (nsdata != sdata && ieee80211_sdata_running(sdata: nsdata)) {
345 /*
346 * Only OCB and monitor mode may coexist
347 */
348 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
349 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
350 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
351 nsdata->vif.type == NL80211_IFTYPE_OCB))
352 return -EBUSY;
353
354 /*
355 * Allow only a single IBSS interface to be up at any
356 * time. This is restricted because beacon distribution
357 * cannot work properly if both are in the same IBSS.
358 *
359 * To remove this restriction we'd have to disallow them
360 * from setting the same SSID on different IBSS interfaces
361 * belonging to the same hardware. Then, however, we're
362 * faced with having to adopt two different TSF timers...
363 */
364 if (iftype == NL80211_IFTYPE_ADHOC &&
365 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
366 return -EBUSY;
367 /*
368 * will not add another interface while any channel
369 * switch is active.
370 */
371 if (nsdata->vif.bss_conf.csa_active)
372 return -EBUSY;
373
374 /*
375 * The remaining checks are only performed for interfaces
376 * with the same MAC address.
377 */
378 if (!ether_addr_equal(addr1: sdata->vif.addr,
379 addr2: nsdata->vif.addr))
380 continue;
381
382 /*
383 * check whether it may have the same address
384 */
385 if (!identical_mac_addr_allowed(type1: iftype,
386 type2: nsdata->vif.type))
387 return -ENOTUNIQ;
388
389 /* No support for VLAN with MLO yet */
390 if (iftype == NL80211_IFTYPE_AP_VLAN &&
391 sdata->wdev.use_4addr &&
392 nsdata->vif.type == NL80211_IFTYPE_AP &&
393 nsdata->vif.valid_links)
394 return -EOPNOTSUPP;
395
396 /*
397 * can only add VLANs to enabled APs
398 */
399 if (iftype == NL80211_IFTYPE_AP_VLAN &&
400 nsdata->vif.type == NL80211_IFTYPE_AP)
401 sdata->bss = &nsdata->u.ap;
402 }
403 }
404
405 return ieee80211_check_combinations(sdata, NULL, chanmode: 0, radar_detect: 0, radio_idx: -1);
406}
407
408static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
409 enum nl80211_iftype iftype)
410{
411 int n_queues = sdata->local->hw.queues;
412 int i;
413
414 if (iftype == NL80211_IFTYPE_NAN)
415 return 0;
416
417 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
418 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
419 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
420 IEEE80211_INVAL_HW_QUEUE))
421 return -EINVAL;
422 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
423 n_queues))
424 return -EINVAL;
425 }
426 }
427
428 if ((iftype != NL80211_IFTYPE_AP &&
429 iftype != NL80211_IFTYPE_P2P_GO &&
430 iftype != NL80211_IFTYPE_MESH_POINT) ||
431 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
432 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
433 return 0;
434 }
435
436 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
437 return -EINVAL;
438
439 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
440 return -EINVAL;
441
442 return 0;
443}
444
445static int ieee80211_open(struct net_device *dev)
446{
447 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
448 int err;
449
450 /* fail early if user set an invalid address */
451 if (!is_valid_ether_addr(addr: dev->dev_addr))
452 return -EADDRNOTAVAIL;
453
454 guard(wiphy)(T: sdata->local->hw.wiphy);
455
456 err = ieee80211_check_concurrent_iface(sdata, iftype: sdata->vif.type);
457 if (err)
458 return err;
459
460 return ieee80211_do_open(wdev: &sdata->wdev, coming_up: true);
461}
462
463static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
464{
465 struct ieee80211_local *local = sdata->local;
466 unsigned long flags;
467 struct sk_buff_head freeq;
468 struct sk_buff *skb, *tmp;
469 u32 hw_reconf_flags = 0;
470 int i, flushed;
471 struct ps_data *ps;
472 struct cfg80211_chan_def chandef;
473 bool cancel_scan;
474 struct cfg80211_nan_func *func;
475
476 lockdep_assert_wiphy(local->hw.wiphy);
477
478 clear_bit(nr: SDATA_STATE_RUNNING, addr: &sdata->state);
479 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
480
481 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
482 if (cancel_scan)
483 ieee80211_scan_cancel(local);
484
485 ieee80211_roc_purge(local, sdata);
486
487 switch (sdata->vif.type) {
488 case NL80211_IFTYPE_STATION:
489 ieee80211_mgd_stop(sdata);
490 break;
491 case NL80211_IFTYPE_ADHOC:
492 ieee80211_ibss_stop(sdata);
493 break;
494 case NL80211_IFTYPE_MONITOR:
495 list_del_rcu(entry: &sdata->u.mntr.list);
496 break;
497 case NL80211_IFTYPE_AP_VLAN:
498 ieee80211_apvlan_link_clear(sdata);
499 break;
500 default:
501 break;
502 }
503
504 /*
505 * Remove all stations associated with this interface.
506 *
507 * This must be done before calling ops->remove_interface()
508 * because otherwise we can later invoke ops->sta_notify()
509 * whenever the STAs are removed, and that invalidates driver
510 * assumptions about always getting a vif pointer that is valid
511 * (because if we remove a STA after ops->remove_interface()
512 * the driver will have removed the vif info already!)
513 *
514 * For AP_VLANs stations may exist since there's nothing else that
515 * would have removed them, but in other modes there shouldn't
516 * be any stations.
517 */
518 flushed = sta_info_flush(sdata, link_id: -1);
519 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
520
521 /* don't count this interface for allmulti while it is down */
522 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
523 atomic_dec(v: &local->iff_allmultis);
524
525 if (sdata->vif.type == NL80211_IFTYPE_AP) {
526 local->fif_pspoll--;
527 local->fif_probe_req--;
528 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
529 local->fif_probe_req--;
530 }
531
532 if (sdata->dev) {
533 netif_addr_lock_bh(dev: sdata->dev);
534 spin_lock_bh(lock: &local->filter_lock);
535 __hw_addr_unsync(to_list: &local->mc_list, from_list: &sdata->dev->mc,
536 addr_len: sdata->dev->addr_len);
537 spin_unlock_bh(lock: &local->filter_lock);
538 netif_addr_unlock_bh(dev: sdata->dev);
539 }
540
541 timer_delete_sync(timer: &local->dynamic_ps_timer);
542 wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->dynamic_ps_enable_work);
543
544 WARN(ieee80211_vif_is_mld(&sdata->vif),
545 "destroying interface with valid links 0x%04x\n",
546 sdata->vif.valid_links);
547
548 sdata->vif.bss_conf.csa_active = false;
549 if (sdata->vif.type == NL80211_IFTYPE_STATION)
550 sdata->deflink.u.mgd.csa.waiting_bcn = false;
551 ieee80211_vif_unblock_queues_csa(sdata);
552
553 wiphy_work_cancel(wiphy: local->hw.wiphy, work: &sdata->deflink.csa.finalize_work);
554 wiphy_work_cancel(wiphy: local->hw.wiphy,
555 work: &sdata->deflink.color_change_finalize_work);
556 wiphy_delayed_work_cancel(wiphy: local->hw.wiphy,
557 dwork: &sdata->deflink.dfs_cac_timer_work);
558
559 if (sdata->wdev.links[0].cac_started) {
560 chandef = sdata->vif.bss_conf.chanreq.oper;
561 WARN_ON(local->suspended);
562 ieee80211_link_release_channel(link: &sdata->deflink);
563 cfg80211_cac_event(netdev: sdata->dev, chandef: &chandef,
564 event: NL80211_RADAR_CAC_ABORTED,
565 GFP_KERNEL, link_id: 0);
566 }
567
568 if (sdata->vif.type == NL80211_IFTYPE_AP) {
569 WARN_ON(!list_empty(&sdata->u.ap.vlans));
570 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
571 /* remove all packets in parent bc_buf pointing to this dev */
572 ps = &sdata->bss->ps;
573
574 spin_lock_irqsave(&ps->bc_buf.lock, flags);
575 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
576 if (skb->dev == sdata->dev) {
577 __skb_unlink(skb, list: &ps->bc_buf);
578 local->total_ps_buffered--;
579 ieee80211_free_txskb(hw: &local->hw, skb);
580 }
581 }
582 spin_unlock_irqrestore(lock: &ps->bc_buf.lock, flags);
583 }
584
585 if (going_down)
586 local->open_count--;
587
588 switch (sdata->vif.type) {
589 case NL80211_IFTYPE_AP_VLAN:
590 list_del(entry: &sdata->u.vlan.list);
591 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
592 /* see comment in the default case below */
593 ieee80211_free_keys(sdata, force_synchronize: true);
594 /* no need to tell driver */
595 break;
596 case NL80211_IFTYPE_MONITOR:
597 local->monitors--;
598
599 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
600 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
601
602 local->virt_monitors--;
603 if (local->virt_monitors == 0) {
604 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
605 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
606 }
607
608 ieee80211_adjust_monitor_flags(sdata, offset: -1);
609 }
610 break;
611 case NL80211_IFTYPE_NAN:
612 /* clean all the functions */
613 spin_lock_bh(lock: &sdata->u.nan.func_lock);
614
615 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
616 idr_remove(&sdata->u.nan.function_inst_ids, id: i);
617 cfg80211_free_nan_func(f: func);
618 }
619 idr_destroy(&sdata->u.nan.function_inst_ids);
620
621 spin_unlock_bh(lock: &sdata->u.nan.func_lock);
622 break;
623 default:
624 wiphy_work_cancel(wiphy: sdata->local->hw.wiphy, work: &sdata->work);
625 /*
626 * When we get here, the interface is marked down.
627 * Free the remaining keys, if there are any
628 * (which can happen in AP mode if userspace sets
629 * keys before the interface is operating)
630 *
631 * Force the key freeing to always synchronize_net()
632 * to wait for the RX path in case it is using this
633 * interface enqueuing frames at this very time on
634 * another CPU.
635 */
636 ieee80211_free_keys(sdata, force_synchronize: true);
637 skb_queue_purge(list: &sdata->skb_queue);
638 skb_queue_purge(list: &sdata->status_queue);
639 }
640
641 /*
642 * Since ieee80211_free_txskb() may issue __dev_queue_xmit()
643 * which should be called with interrupts enabled, reclamation
644 * is done in two phases:
645 */
646 __skb_queue_head_init(list: &freeq);
647
648 /* unlink from local queues... */
649 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
650 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
651 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
652 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
653 if (info->control.vif == &sdata->vif) {
654 __skb_unlink(skb, list: &local->pending[i]);
655 __skb_queue_tail(list: &freeq, newsk: skb);
656 }
657 }
658 }
659 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
660
661 /* ... and perform actual reclamation with interrupts enabled. */
662 skb_queue_walk_safe(&freeq, skb, tmp) {
663 __skb_unlink(skb, list: &freeq);
664 ieee80211_free_txskb(hw: &local->hw, skb);
665 }
666
667 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
668 ieee80211_txq_remove_vlan(local, sdata);
669
670 if (sdata->vif.txq)
671 ieee80211_txq_purge(local: sdata->local, txqi: to_txq_info(txq: sdata->vif.txq));
672
673 sdata->bss = NULL;
674
675 if (local->open_count == 0)
676 ieee80211_clear_tx_pending(local);
677
678 sdata->vif.bss_conf.beacon_int = 0;
679
680 /*
681 * If the interface goes down while suspended, presumably because
682 * the device was unplugged and that happens before our resume,
683 * then the driver is already unconfigured and the remainder of
684 * this function isn't needed.
685 * XXX: what about WoWLAN? If the device has software state, e.g.
686 * memory allocated, it might expect teardown commands from
687 * mac80211 here?
688 */
689 if (local->suspended) {
690 WARN_ON(local->wowlan);
691 WARN_ON(rcu_access_pointer(local->monitor_sdata));
692 return;
693 }
694
695 switch (sdata->vif.type) {
696 case NL80211_IFTYPE_AP_VLAN:
697 break;
698 case NL80211_IFTYPE_MONITOR:
699 if (local->virt_monitors == 0)
700 ieee80211_del_virtual_monitor(local);
701
702 ieee80211_recalc_idle(local);
703 ieee80211_recalc_offload(local);
704
705 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
706 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
707 break;
708
709 ieee80211_link_release_channel(link: &sdata->deflink);
710 fallthrough;
711 default:
712 if (!going_down)
713 break;
714 drv_remove_interface(local, sdata);
715
716 /* Clear private driver data to prevent reuse */
717 memset(s: sdata->vif.drv_priv, c: 0, n: local->hw.vif_data_size);
718 }
719
720 ieee80211_recalc_ps(local);
721
722 if (cancel_scan)
723 wiphy_delayed_work_flush(wiphy: local->hw.wiphy, dwork: &local->scan_work);
724
725 if (local->open_count == 0) {
726 ieee80211_stop_device(local, suspend: false);
727
728 /* no reconfiguring after stop! */
729 return;
730 }
731
732 /* do after stop to avoid reconfiguring when we stop anyway */
733 ieee80211_configure_filter(local);
734 ieee80211_hw_config(local, radio_idx: -1, changed: hw_reconf_flags);
735
736 if (local->virt_monitors == local->open_count)
737 ieee80211_add_virtual_monitor(local);
738}
739
740void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
741{
742 struct ieee80211_sub_if_data *tx_sdata;
743 struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
744 struct ieee80211_link_data *tx_link, *link;
745 unsigned int link_id;
746
747 lockdep_assert_wiphy(sdata->local->hw.wiphy);
748
749 /* Check if any of the links of current sdata is an MBSSID. */
750 for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
751 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata);
752 if (!tx_bss_conf)
753 continue;
754
755 tx_sdata = vif_to_sdata(p: tx_bss_conf->vif);
756 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
757
758 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion
759 * while closing tx sdata at the end of outer loop below.
760 */
761 if (sdata != tx_sdata) {
762 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id],
763 tx_sdata);
764 if (!tx_link)
765 continue;
766
767 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL);
768 }
769
770 /* loop through sdatas to find if any of their links
771 * belong to same MBSSID set as the one getting deleted.
772 */
773 for_each_sdata_link(tx_sdata->local, link) {
774 struct ieee80211_sub_if_data *link_sdata = link->sdata;
775
776 if (link_sdata == sdata || link_sdata == tx_sdata ||
777 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf)
778 continue;
779
780 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL);
781
782 /* Remove all links of matching MLD until dynamic link
783 * removal can be supported.
784 */
785 cfg80211_stop_iface(wiphy: link_sdata->wdev.wiphy, wdev: &link_sdata->wdev,
786 GFP_KERNEL);
787 }
788
789 /* If we are not tx sdata, remove links of tx sdata and proceed */
790 if (sdata != tx_sdata && ieee80211_sdata_running(sdata: tx_sdata))
791 cfg80211_stop_iface(wiphy: tx_sdata->wdev.wiphy,
792 wdev: &tx_sdata->wdev, GFP_KERNEL);
793 }
794}
795
796static int ieee80211_stop(struct net_device *dev)
797{
798 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
799
800 /* close dependent VLAN interfaces before locking wiphy */
801 if (sdata->vif.type == NL80211_IFTYPE_AP) {
802 struct ieee80211_sub_if_data *vlan, *tmpsdata;
803
804 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
805 u.vlan.list)
806 dev_close(dev: vlan->dev);
807 }
808
809 guard(wiphy)(T: sdata->local->hw.wiphy);
810
811 wiphy_work_cancel(wiphy: sdata->local->hw.wiphy, work: &sdata->activate_links_work);
812
813 /* Close the dependent MBSSID interfaces with wiphy lock as we may be
814 * terminating its partner links too in case of MLD.
815 */
816 if (sdata->vif.type == NL80211_IFTYPE_AP)
817 ieee80211_stop_mbssid(sdata);
818
819 ieee80211_do_stop(sdata, going_down: true);
820
821 return 0;
822}
823
824static void ieee80211_set_multicast_list(struct net_device *dev)
825{
826 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
827 struct ieee80211_local *local = sdata->local;
828 int allmulti, sdata_allmulti;
829
830 allmulti = !!(dev->flags & IFF_ALLMULTI);
831 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
832
833 if (allmulti != sdata_allmulti) {
834 if (dev->flags & IFF_ALLMULTI)
835 atomic_inc(v: &local->iff_allmultis);
836 else
837 atomic_dec(v: &local->iff_allmultis);
838 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
839 }
840
841 spin_lock_bh(lock: &local->filter_lock);
842 __hw_addr_sync(to_list: &local->mc_list, from_list: &dev->mc, addr_len: dev->addr_len);
843 spin_unlock_bh(lock: &local->filter_lock);
844 wiphy_work_queue(wiphy: local->hw.wiphy, work: &local->reconfig_filter);
845}
846
847/*
848 * Called when the netdev is removed or, by the code below, before
849 * the interface type changes.
850 */
851static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
852{
853 if (WARN_ON(!list_empty(&sdata->work.entry)))
854 wiphy_work_cancel(wiphy: sdata->local->hw.wiphy, work: &sdata->work);
855
856 /* free extra data */
857 ieee80211_free_keys(sdata, force_synchronize: false);
858
859 ieee80211_debugfs_remove_netdev(sdata);
860
861 ieee80211_destroy_frag_cache(cache: &sdata->frags);
862
863 if (ieee80211_vif_is_mesh(vif: &sdata->vif))
864 ieee80211_mesh_teardown_sdata(sdata);
865
866 ieee80211_vif_clear_links(sdata);
867 ieee80211_link_stop(link: &sdata->deflink);
868}
869
870static void ieee80211_uninit(struct net_device *dev)
871{
872 ieee80211_teardown_sdata(sdata: IEEE80211_DEV_TO_SUB_IF(dev));
873}
874
875static int ieee80211_netdev_setup_tc(struct net_device *dev,
876 enum tc_setup_type type, void *type_data)
877{
878 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
879 struct ieee80211_local *local = sdata->local;
880
881 return drv_net_setup_tc(local, sdata, dev, type, type_data);
882}
883
884static const struct net_device_ops ieee80211_dataif_ops = {
885 .ndo_open = ieee80211_open,
886 .ndo_stop = ieee80211_stop,
887 .ndo_uninit = ieee80211_uninit,
888 .ndo_start_xmit = ieee80211_subif_start_xmit,
889 .ndo_set_rx_mode = ieee80211_set_multicast_list,
890 .ndo_set_mac_address = ieee80211_change_mac,
891 .ndo_setup_tc = ieee80211_netdev_setup_tc,
892};
893
894static u16 ieee80211_monitor_select_queue(struct net_device *dev,
895 struct sk_buff *skb,
896 struct net_device *sb_dev)
897{
898 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
899 struct ieee80211_local *local = sdata->local;
900 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
901 struct ieee80211_hdr *hdr;
902 int len_rthdr;
903
904 if (local->hw.queues < IEEE80211_NUM_ACS)
905 return 0;
906
907 /* reset flags and info before parsing radiotap header */
908 memset(s: info, c: 0, n: sizeof(*info));
909
910 if (!ieee80211_parse_tx_radiotap(skb, dev))
911 return 0; /* doesn't matter, frame will be dropped */
912
913 len_rthdr = ieee80211_get_radiotap_len(data: skb->data);
914 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
915 if (skb->len < len_rthdr + 2 ||
916 skb->len < len_rthdr + ieee80211_hdrlen(fc: hdr->frame_control))
917 return 0; /* doesn't matter, frame will be dropped */
918
919 return ieee80211_select_queue_80211(sdata, skb, hdr);
920}
921
922static const struct net_device_ops ieee80211_monitorif_ops = {
923 .ndo_open = ieee80211_open,
924 .ndo_stop = ieee80211_stop,
925 .ndo_uninit = ieee80211_uninit,
926 .ndo_start_xmit = ieee80211_monitor_start_xmit,
927 .ndo_set_rx_mode = ieee80211_set_multicast_list,
928 .ndo_set_mac_address = ieee80211_change_mac,
929 .ndo_select_queue = ieee80211_monitor_select_queue,
930};
931
932static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
933 struct net_device_path *path)
934{
935 struct ieee80211_sub_if_data *sdata;
936 struct ieee80211_local *local;
937 struct sta_info *sta;
938 int ret = -ENOENT;
939
940 sdata = IEEE80211_DEV_TO_SUB_IF(dev: ctx->dev);
941 local = sdata->local;
942
943 if (!local->ops->net_fill_forward_path)
944 return -EOPNOTSUPP;
945
946 rcu_read_lock();
947 switch (sdata->vif.type) {
948 case NL80211_IFTYPE_AP_VLAN:
949 sta = rcu_dereference(sdata->u.vlan.sta);
950 if (sta)
951 break;
952 if (sdata->wdev.use_4addr)
953 goto out;
954 if (is_multicast_ether_addr(addr: ctx->daddr))
955 goto out;
956 sta = sta_info_get_bss(sdata, addr: ctx->daddr);
957 break;
958 case NL80211_IFTYPE_AP:
959 if (is_multicast_ether_addr(addr: ctx->daddr))
960 goto out;
961 sta = sta_info_get(sdata, addr: ctx->daddr);
962 break;
963 case NL80211_IFTYPE_STATION:
964 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
965 sta = sta_info_get(sdata, addr: ctx->daddr);
966 if (sta && test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER)) {
967 if (!test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER_AUTH))
968 goto out;
969
970 break;
971 }
972 }
973
974 sta = sta_info_get(sdata, addr: sdata->deflink.u.mgd.bssid);
975 break;
976 default:
977 goto out;
978 }
979
980 if (!sta)
981 goto out;
982
983 ret = drv_net_fill_forward_path(local, sdata, sta: &sta->sta, ctx, path);
984out:
985 rcu_read_unlock();
986
987 return ret;
988}
989
990static const struct net_device_ops ieee80211_dataif_8023_ops = {
991 .ndo_open = ieee80211_open,
992 .ndo_stop = ieee80211_stop,
993 .ndo_uninit = ieee80211_uninit,
994 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
995 .ndo_set_rx_mode = ieee80211_set_multicast_list,
996 .ndo_set_mac_address = ieee80211_change_mac,
997 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
998 .ndo_setup_tc = ieee80211_netdev_setup_tc,
999};
1000
1001static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
1002{
1003 switch (iftype) {
1004 /* P2P GO and client are mapped to AP/STATION types */
1005 case NL80211_IFTYPE_AP:
1006 case NL80211_IFTYPE_STATION:
1007 return true;
1008 default:
1009 return false;
1010 }
1011}
1012
1013static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
1014{
1015 struct ieee80211_local *local = sdata->local;
1016 u32 flags;
1017
1018 flags = sdata->vif.offload_flags;
1019
1020 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
1021 ieee80211_iftype_supports_hdr_offload(iftype: sdata->vif.type)) {
1022 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
1023
1024 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1025 local->hw.wiphy->frag_threshold != (u32)-1)
1026 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1027
1028 if (local->virt_monitors)
1029 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1030 } else {
1031 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1032 }
1033
1034 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
1035 ieee80211_iftype_supports_hdr_offload(iftype: sdata->vif.type)) {
1036 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
1037
1038 if (local->virt_monitors &&
1039 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
1040 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1041 } else {
1042 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1043 }
1044
1045 if (sdata->vif.offload_flags == flags)
1046 return false;
1047
1048 sdata->vif.offload_flags = flags;
1049 ieee80211_check_fast_rx_iface(sdata);
1050 return true;
1051}
1052
1053static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1054{
1055 struct ieee80211_local *local = sdata->local;
1056 struct ieee80211_sub_if_data *bss = sdata;
1057 bool enabled;
1058
1059 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1060 if (!sdata->bss)
1061 return;
1062
1063 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1064 }
1065
1066 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1067 !ieee80211_iftype_supports_hdr_offload(iftype: bss->vif.type))
1068 return;
1069
1070 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1071 if (sdata->wdev.use_4addr &&
1072 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1073 enabled = false;
1074
1075 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1076 &ieee80211_dataif_ops;
1077}
1078
1079static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1080{
1081 struct ieee80211_local *local = sdata->local;
1082 struct ieee80211_sub_if_data *vsdata;
1083
1084 if (ieee80211_set_sdata_offload_flags(sdata)) {
1085 drv_update_vif_offload(local, sdata);
1086 ieee80211_set_vif_encap_ops(sdata);
1087 }
1088
1089 list_for_each_entry(vsdata, &local->interfaces, list) {
1090 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1091 vsdata->bss != &sdata->u.ap)
1092 continue;
1093
1094 ieee80211_set_vif_encap_ops(sdata: vsdata);
1095 }
1096}
1097
1098void ieee80211_recalc_offload(struct ieee80211_local *local)
1099{
1100 struct ieee80211_sub_if_data *sdata;
1101
1102 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1103 return;
1104
1105 lockdep_assert_wiphy(local->hw.wiphy);
1106
1107 list_for_each_entry(sdata, &local->interfaces, list) {
1108 if (!ieee80211_sdata_running(sdata))
1109 continue;
1110
1111 ieee80211_recalc_sdata_offload(sdata);
1112 }
1113}
1114
1115void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1116 const int offset)
1117{
1118 struct ieee80211_local *local = sdata->local;
1119 u32 flags = sdata->u.mntr.flags;
1120
1121#define ADJUST(_f, _s) do { \
1122 if (flags & MONITOR_FLAG_##_f) \
1123 local->fif_##_s += offset; \
1124 } while (0)
1125
1126 ADJUST(FCSFAIL, fcsfail);
1127 ADJUST(PLCPFAIL, plcpfail);
1128 ADJUST(CONTROL, control);
1129 ADJUST(CONTROL, pspoll);
1130 ADJUST(OTHER_BSS, other_bss);
1131 if (!(flags & MONITOR_FLAG_SKIP_TX))
1132 local->tx_mntrs += offset;
1133
1134#undef ADJUST
1135}
1136
1137static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1138{
1139 struct ieee80211_local *local = sdata->local;
1140 int i;
1141
1142 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1143 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1144 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1145 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1146 sdata->vif.hw_queue[i] = i;
1147 else
1148 sdata->vif.hw_queue[i] = 0;
1149 }
1150 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1151}
1152
1153static void ieee80211_sdata_init(struct ieee80211_local *local,
1154 struct ieee80211_sub_if_data *sdata)
1155{
1156 sdata->local = local;
1157
1158 INIT_LIST_HEAD(list: &sdata->key_list);
1159
1160 /*
1161 * Initialize the default link, so we can use link_id 0 for non-MLD,
1162 * and that continues to work for non-MLD-aware drivers that use just
1163 * vif.bss_conf instead of vif.link_conf.
1164 *
1165 * Note that we never change this, so if link ID 0 isn't used in an
1166 * MLD connection, we get a separate allocation for it.
1167 */
1168 ieee80211_link_init(sdata, link_id: -1, link: &sdata->deflink, link_conf: &sdata->vif.bss_conf);
1169}
1170
1171int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1172{
1173 struct ieee80211_sub_if_data *sdata;
1174 int ret;
1175
1176 ASSERT_RTNL();
1177 lockdep_assert_wiphy(local->hw.wiphy);
1178
1179 if (local->monitor_sdata ||
1180 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1181 return 0;
1182
1183 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1184 if (!sdata)
1185 return -ENOMEM;
1186
1187 /* set up data */
1188 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1189 snprintf(buf: sdata->name, IFNAMSIZ, fmt: "%s-monitor",
1190 wiphy_name(wiphy: local->hw.wiphy));
1191 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1192 sdata->wdev.wiphy = local->hw.wiphy;
1193
1194 ieee80211_sdata_init(local, sdata);
1195
1196 ieee80211_set_default_queues(sdata);
1197
1198 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1199 ret = drv_add_interface(local, sdata);
1200 if (WARN_ON(ret)) {
1201 /* ok .. stupid driver, it asked for this! */
1202 kfree(objp: sdata);
1203 return ret;
1204 }
1205 }
1206
1207 set_bit(nr: SDATA_STATE_RUNNING, addr: &sdata->state);
1208
1209 ret = ieee80211_check_queues(sdata, iftype: NL80211_IFTYPE_MONITOR);
1210 if (ret) {
1211 kfree(objp: sdata);
1212 return ret;
1213 }
1214
1215 mutex_lock(lock: &local->iflist_mtx);
1216 rcu_assign_pointer(local->monitor_sdata, sdata);
1217 mutex_unlock(lock: &local->iflist_mtx);
1218
1219 ret = ieee80211_link_use_channel(link: &sdata->deflink, req: &local->monitor_chanreq,
1220 mode: IEEE80211_CHANCTX_EXCLUSIVE);
1221 if (ret) {
1222 mutex_lock(lock: &local->iflist_mtx);
1223 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1224 mutex_unlock(lock: &local->iflist_mtx);
1225 synchronize_net();
1226 drv_remove_interface(local, sdata);
1227 kfree(objp: sdata);
1228 return ret;
1229 }
1230
1231 skb_queue_head_init(list: &sdata->skb_queue);
1232 skb_queue_head_init(list: &sdata->status_queue);
1233 wiphy_work_init(work: &sdata->work, func: ieee80211_iface_work);
1234
1235 return 0;
1236}
1237
1238void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1239{
1240 struct ieee80211_sub_if_data *sdata;
1241
1242 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1243 return;
1244
1245 ASSERT_RTNL();
1246 lockdep_assert_wiphy(local->hw.wiphy);
1247
1248 mutex_lock(lock: &local->iflist_mtx);
1249
1250 sdata = rcu_dereference_protected(local->monitor_sdata,
1251 lockdep_is_held(&local->iflist_mtx));
1252 if (!sdata) {
1253 mutex_unlock(lock: &local->iflist_mtx);
1254 return;
1255 }
1256
1257 clear_bit(nr: SDATA_STATE_RUNNING, addr: &sdata->state);
1258 ieee80211_link_release_channel(link: &sdata->deflink);
1259
1260 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1261 drv_remove_interface(local, sdata);
1262
1263 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1264 mutex_unlock(lock: &local->iflist_mtx);
1265
1266 synchronize_net();
1267
1268 kfree(objp: sdata);
1269}
1270
1271/*
1272 * NOTE: Be very careful when changing this function, it must NOT return
1273 * an error on interface type changes that have been pre-checked, so most
1274 * checks should be in ieee80211_check_concurrent_iface.
1275 */
1276int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1277{
1278 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1279 struct net_device *dev = wdev->netdev;
1280 struct ieee80211_local *local = sdata->local;
1281 u64 changed = 0;
1282 int res;
1283 u32 hw_reconf_flags = 0;
1284
1285 lockdep_assert_wiphy(local->hw.wiphy);
1286
1287 switch (sdata->vif.type) {
1288 case NL80211_IFTYPE_AP_VLAN: {
1289 struct ieee80211_sub_if_data *master;
1290
1291 if (!sdata->bss)
1292 return -ENOLINK;
1293
1294 list_add(new: &sdata->u.vlan.list, head: &sdata->bss->vlans);
1295
1296 master = container_of(sdata->bss,
1297 struct ieee80211_sub_if_data, u.ap);
1298 sdata->control_port_protocol =
1299 master->control_port_protocol;
1300 sdata->control_port_no_encrypt =
1301 master->control_port_no_encrypt;
1302 sdata->control_port_over_nl80211 =
1303 master->control_port_over_nl80211;
1304 sdata->control_port_no_preauth =
1305 master->control_port_no_preauth;
1306 sdata->vif.cab_queue = master->vif.cab_queue;
1307 memcpy(to: sdata->vif.hw_queue, from: master->vif.hw_queue,
1308 len: sizeof(sdata->vif.hw_queue));
1309 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq;
1310
1311 sdata->crypto_tx_tailroom_needed_cnt +=
1312 master->crypto_tx_tailroom_needed_cnt;
1313
1314 ieee80211_apvlan_link_setup(sdata);
1315
1316 break;
1317 }
1318 case NL80211_IFTYPE_AP:
1319 sdata->bss = &sdata->u.ap;
1320 break;
1321 case NL80211_IFTYPE_MESH_POINT:
1322 case NL80211_IFTYPE_STATION:
1323 case NL80211_IFTYPE_MONITOR:
1324 case NL80211_IFTYPE_ADHOC:
1325 case NL80211_IFTYPE_P2P_DEVICE:
1326 case NL80211_IFTYPE_OCB:
1327 case NL80211_IFTYPE_NAN:
1328 /* no special treatment */
1329 break;
1330 case NL80211_IFTYPE_UNSPECIFIED:
1331 case NUM_NL80211_IFTYPES:
1332 case NL80211_IFTYPE_P2P_CLIENT:
1333 case NL80211_IFTYPE_P2P_GO:
1334 case NL80211_IFTYPE_WDS:
1335 /* cannot happen */
1336 WARN_ON(1);
1337 break;
1338 }
1339
1340 if (local->open_count == 0) {
1341 /* here we can consider everything in good order (again) */
1342 local->reconfig_failure = false;
1343
1344 res = drv_start(local);
1345 if (res)
1346 goto err_del_bss;
1347 ieee80211_led_radio(local, enabled: true);
1348 ieee80211_mod_tpt_led_trig(local,
1349 types_on: IEEE80211_TPT_LEDTRIG_FL_RADIO, types_off: 0);
1350 }
1351
1352 /*
1353 * Copy the hopefully now-present MAC address to
1354 * this interface, if it has the special null one.
1355 */
1356 if (dev && is_zero_ether_addr(addr: dev->dev_addr)) {
1357 eth_hw_addr_set(dev, addr: local->hw.wiphy->perm_addr);
1358 memcpy(to: dev->perm_addr, from: dev->dev_addr, ETH_ALEN);
1359
1360 if (!is_valid_ether_addr(addr: dev->dev_addr)) {
1361 res = -EADDRNOTAVAIL;
1362 goto err_stop;
1363 }
1364 }
1365
1366 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
1367 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
1368 switch (sdata->vif.type) {
1369 case NL80211_IFTYPE_AP_VLAN:
1370 /* no need to tell driver, but set carrier and chanctx */
1371 if (sdata->bss->active) {
1372 struct ieee80211_link_data *link;
1373
1374 for_each_link_data(sdata, link) {
1375 ieee80211_link_vlan_copy_chanctx(link);
1376 }
1377
1378 netif_carrier_on(dev);
1379 ieee80211_set_vif_encap_ops(sdata);
1380 } else {
1381 netif_carrier_off(dev);
1382 }
1383 break;
1384 case NL80211_IFTYPE_MONITOR:
1385 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1386 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
1387 res = drv_add_interface(local, sdata);
1388 if (res)
1389 goto err_stop;
1390 } else {
1391 if (local->virt_monitors == 0 && local->open_count == 0) {
1392 res = ieee80211_add_virtual_monitor(local);
1393 if (res)
1394 goto err_stop;
1395 }
1396 local->virt_monitors++;
1397
1398 /* must be before the call to ieee80211_configure_filter */
1399 if (local->virt_monitors == 1) {
1400 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1401 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1402 }
1403 }
1404
1405 local->monitors++;
1406
1407 ieee80211_adjust_monitor_flags(sdata, offset: 1);
1408 ieee80211_configure_filter(local);
1409 ieee80211_recalc_offload(local);
1410 ieee80211_recalc_idle(local);
1411
1412 netif_carrier_on(dev);
1413 list_add_tail_rcu(new: &sdata->u.mntr.list, head: &local->mon_list);
1414 break;
1415 default:
1416 if (coming_up) {
1417 ieee80211_del_virtual_monitor(local);
1418 ieee80211_set_sdata_offload_flags(sdata);
1419
1420 res = drv_add_interface(local, sdata);
1421 if (res)
1422 goto err_stop;
1423
1424 ieee80211_set_vif_encap_ops(sdata);
1425 res = ieee80211_check_queues(sdata,
1426 iftype: ieee80211_vif_type_p2p(vif: &sdata->vif));
1427 if (res)
1428 goto err_del_interface;
1429 }
1430
1431 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1432 local->fif_pspoll++;
1433 local->fif_probe_req++;
1434
1435 ieee80211_configure_filter(local);
1436 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1437 local->fif_probe_req++;
1438 }
1439
1440 if (sdata->vif.probe_req_reg)
1441 drv_config_iface_filter(local, sdata,
1442 filter_flags: FIF_PROBE_REQ,
1443 changed_flags: FIF_PROBE_REQ);
1444
1445 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1446 sdata->vif.type != NL80211_IFTYPE_NAN)
1447 changed |= ieee80211_reset_erp_info(sdata);
1448 ieee80211_link_info_change_notify(sdata, link: &sdata->deflink,
1449 changed);
1450
1451 switch (sdata->vif.type) {
1452 case NL80211_IFTYPE_STATION:
1453 case NL80211_IFTYPE_ADHOC:
1454 case NL80211_IFTYPE_AP:
1455 case NL80211_IFTYPE_MESH_POINT:
1456 case NL80211_IFTYPE_OCB:
1457 netif_carrier_off(dev);
1458 break;
1459 case NL80211_IFTYPE_P2P_DEVICE:
1460 case NL80211_IFTYPE_NAN:
1461 break;
1462 default:
1463 /* not reached */
1464 WARN_ON(1);
1465 }
1466
1467 /*
1468 * Set default queue parameters so drivers don't
1469 * need to initialise the hardware if the hardware
1470 * doesn't start up with sane defaults.
1471 * Enable QoS for anything but station interfaces.
1472 */
1473 ieee80211_set_wmm_default(link: &sdata->deflink, bss_notify: true,
1474 enable_qos: sdata->vif.type != NL80211_IFTYPE_STATION);
1475 }
1476
1477 /*
1478 * set_multicast_list will be invoked by the networking core
1479 * which will check whether any increments here were done in
1480 * error and sync them down to the hardware as filter flags.
1481 */
1482 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1483 atomic_inc(v: &local->iff_allmultis);
1484
1485 if (coming_up)
1486 local->open_count++;
1487
1488 if (local->open_count == 1)
1489 ieee80211_hw_conf_init(local);
1490 else if (hw_reconf_flags)
1491 ieee80211_hw_config(local, radio_idx: -1, changed: hw_reconf_flags);
1492
1493 ieee80211_recalc_ps(local);
1494
1495 set_bit(nr: SDATA_STATE_RUNNING, addr: &sdata->state);
1496
1497 return 0;
1498 err_del_interface:
1499 drv_remove_interface(local, sdata);
1500 err_stop:
1501 if (!local->open_count)
1502 drv_stop(local, suspend: false);
1503 err_del_bss:
1504 sdata->bss = NULL;
1505 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1506 list_del(entry: &sdata->u.vlan.list);
1507 /* might already be clear but that doesn't matter */
1508 clear_bit(nr: SDATA_STATE_RUNNING, addr: &sdata->state);
1509 return res;
1510}
1511
1512static void ieee80211_if_setup(struct net_device *dev)
1513{
1514 ether_setup(dev);
1515 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1516 dev->priv_flags |= IFF_NO_QUEUE;
1517 dev->netdev_ops = &ieee80211_dataif_ops;
1518 dev->needs_free_netdev = true;
1519}
1520
1521static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1522 struct ieee80211_sub_if_data *sdata,
1523 struct sk_buff *skb)
1524{
1525 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1526
1527 lockdep_assert_wiphy(local->hw.wiphy);
1528
1529 if (ieee80211_is_action(fc: mgmt->frame_control) &&
1530 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1531 struct sta_info *sta;
1532 int len = skb->len;
1533
1534 sta = sta_info_get_bss(sdata, addr: mgmt->sa);
1535 if (sta) {
1536 switch (mgmt->u.action.u.addba_req.action_code) {
1537 case WLAN_ACTION_ADDBA_REQ:
1538 ieee80211_process_addba_request(local, sta,
1539 mgmt, len);
1540 break;
1541 case WLAN_ACTION_ADDBA_RESP:
1542 ieee80211_process_addba_resp(local, sta,
1543 mgmt, len);
1544 break;
1545 case WLAN_ACTION_DELBA:
1546 ieee80211_process_delba(sdata, sta,
1547 mgmt, len);
1548 break;
1549 default:
1550 WARN_ON(1);
1551 break;
1552 }
1553 }
1554 } else if (ieee80211_is_action(fc: mgmt->frame_control) &&
1555 mgmt->u.action.category == WLAN_CATEGORY_HT) {
1556 switch (mgmt->u.action.u.ht_smps.action) {
1557 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
1558 u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
1559 struct ieee80211_rx_status *status;
1560 struct link_sta_info *link_sta;
1561 struct sta_info *sta;
1562
1563 sta = sta_info_get_bss(sdata, addr: mgmt->sa);
1564 if (!sta)
1565 break;
1566
1567 status = IEEE80211_SKB_RXCB(skb);
1568 if (!status->link_valid)
1569 link_sta = &sta->deflink;
1570 else
1571 link_sta = rcu_dereference_protected(sta->link[status->link_id],
1572 lockdep_is_held(&local->hw.wiphy->mtx));
1573 if (link_sta)
1574 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta,
1575 link_sta, chanwidth,
1576 band: status->band);
1577 break;
1578 }
1579 default:
1580 WARN_ON(1);
1581 break;
1582 }
1583 } else if (ieee80211_is_action(fc: mgmt->frame_control) &&
1584 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1585 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1586 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1587 struct ieee80211_rx_status *status;
1588 enum nl80211_band band;
1589 struct sta_info *sta;
1590 u8 opmode;
1591
1592 status = IEEE80211_SKB_RXCB(skb);
1593 band = status->band;
1594 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1595
1596 sta = sta_info_get_bss(sdata, addr: mgmt->sa);
1597
1598 if (sta)
1599 ieee80211_vht_handle_opmode(sdata,
1600 sta: &sta->deflink,
1601 opmode, band);
1602
1603 break;
1604 }
1605 case WLAN_VHT_ACTION_GROUPID_MGMT:
1606 ieee80211_process_mu_groups(sdata, link: &sdata->deflink,
1607 mgmt);
1608 break;
1609 default:
1610 WARN_ON(1);
1611 break;
1612 }
1613 } else if (ieee80211_is_action(fc: mgmt->frame_control) &&
1614 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1615 switch (mgmt->u.action.u.s1g.action_code) {
1616 case WLAN_S1G_TWT_TEARDOWN:
1617 case WLAN_S1G_TWT_SETUP:
1618 ieee80211_s1g_rx_twt_action(sdata, skb);
1619 break;
1620 default:
1621 break;
1622 }
1623 } else if (ieee80211_is_action(fc: mgmt->frame_control) &&
1624 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) {
1625 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1626 switch (mgmt->u.action.u.ttlm_req.action_code) {
1627 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
1628 ieee80211_process_neg_ttlm_req(sdata, mgmt,
1629 len: skb->len);
1630 break;
1631 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
1632 ieee80211_process_neg_ttlm_res(sdata, mgmt,
1633 len: skb->len);
1634 break;
1635 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
1636 ieee80211_process_ttlm_teardown(sdata);
1637 break;
1638 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
1639 ieee80211_process_ml_reconf_resp(sdata, mgmt,
1640 len: skb->len);
1641 break;
1642 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
1643 ieee80211_process_epcs_ena_resp(sdata, mgmt,
1644 len: skb->len);
1645 break;
1646 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
1647 ieee80211_process_epcs_teardown(sdata, mgmt,
1648 len: skb->len);
1649 break;
1650 default:
1651 break;
1652 }
1653 }
1654 } else if (ieee80211_is_ext(fc: mgmt->frame_control)) {
1655 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1656 ieee80211_sta_rx_queued_ext(sdata, skb);
1657 else
1658 WARN_ON(1);
1659 } else if (ieee80211_is_data_qos(fc: mgmt->frame_control)) {
1660 struct ieee80211_hdr *hdr = (void *)mgmt;
1661 struct sta_info *sta;
1662
1663 /*
1664 * So the frame isn't mgmt, but frame_control
1665 * is at the right place anyway, of course, so
1666 * the if statement is correct.
1667 *
1668 * Warn if we have other data frame types here,
1669 * they must not get here.
1670 */
1671 WARN_ON(hdr->frame_control &
1672 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1673 WARN_ON(!(hdr->seq_ctrl &
1674 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1675 /*
1676 * This was a fragment of a frame, received while
1677 * a block-ack session was active. That cannot be
1678 * right, so terminate the session.
1679 */
1680 sta = sta_info_get_bss(sdata, addr: mgmt->sa);
1681 if (sta) {
1682 u16 tid = ieee80211_get_tid(hdr);
1683
1684 __ieee80211_stop_rx_ba_session(
1685 sta, tid, initiator: WLAN_BACK_RECIPIENT,
1686 reason: WLAN_REASON_QSTA_REQUIRE_SETUP,
1687 stop: true);
1688 }
1689 } else switch (sdata->vif.type) {
1690 case NL80211_IFTYPE_STATION:
1691 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1692 break;
1693 case NL80211_IFTYPE_ADHOC:
1694 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1695 break;
1696 case NL80211_IFTYPE_MESH_POINT:
1697 if (!ieee80211_vif_is_mesh(vif: &sdata->vif))
1698 break;
1699 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1700 break;
1701 default:
1702 WARN(1, "frame for unexpected interface type");
1703 break;
1704 }
1705}
1706
1707static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1708 struct sk_buff *skb)
1709{
1710 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1711
1712 if (ieee80211_is_action(fc: mgmt->frame_control) &&
1713 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1714 switch (mgmt->u.action.u.s1g.action_code) {
1715 case WLAN_S1G_TWT_TEARDOWN:
1716 case WLAN_S1G_TWT_SETUP:
1717 ieee80211_s1g_status_twt_action(sdata, skb);
1718 break;
1719 default:
1720 break;
1721 }
1722 }
1723}
1724
1725static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1726{
1727 struct ieee80211_sub_if_data *sdata =
1728 container_of(work, struct ieee80211_sub_if_data, work);
1729 struct ieee80211_local *local = sdata->local;
1730 struct sk_buff *skb;
1731
1732 if (!ieee80211_sdata_running(sdata))
1733 return;
1734
1735 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1736 return;
1737
1738 if (!ieee80211_can_run_worker(local))
1739 return;
1740
1741 /* first process frames */
1742 while ((skb = skb_dequeue(list: &sdata->skb_queue))) {
1743 kcov_remote_start_common(id: skb_get_kcov_handle(skb));
1744
1745 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1746 ieee80211_process_tdls_channel_switch(sdata, skb);
1747 else
1748 ieee80211_iface_process_skb(local, sdata, skb);
1749
1750 kfree_skb(skb);
1751 kcov_remote_stop();
1752 }
1753
1754 /* process status queue */
1755 while ((skb = skb_dequeue(list: &sdata->status_queue))) {
1756 kcov_remote_start_common(id: skb_get_kcov_handle(skb));
1757
1758 ieee80211_iface_process_status(sdata, skb);
1759 kfree_skb(skb);
1760
1761 kcov_remote_stop();
1762 }
1763
1764 /* then other type-dependent work */
1765 switch (sdata->vif.type) {
1766 case NL80211_IFTYPE_STATION:
1767 ieee80211_sta_work(sdata);
1768 break;
1769 case NL80211_IFTYPE_ADHOC:
1770 ieee80211_ibss_work(sdata);
1771 break;
1772 case NL80211_IFTYPE_MESH_POINT:
1773 if (!ieee80211_vif_is_mesh(vif: &sdata->vif))
1774 break;
1775 ieee80211_mesh_work(sdata);
1776 break;
1777 case NL80211_IFTYPE_OCB:
1778 ieee80211_ocb_work(sdata);
1779 break;
1780 default:
1781 break;
1782 }
1783}
1784
1785static void ieee80211_activate_links_work(struct wiphy *wiphy,
1786 struct wiphy_work *work)
1787{
1788 struct ieee80211_sub_if_data *sdata =
1789 container_of(work, struct ieee80211_sub_if_data,
1790 activate_links_work);
1791 struct ieee80211_local *local = wiphy_priv(wiphy);
1792
1793 if (local->in_reconfig)
1794 return;
1795
1796 ieee80211_set_active_links(vif: &sdata->vif, active_links: sdata->desired_active_links);
1797 sdata->desired_active_links = 0;
1798}
1799
1800/*
1801 * Helper function to initialise an interface to a specific type.
1802 */
1803static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1804 enum nl80211_iftype type)
1805{
1806 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1807 0xff, 0xff, 0xff};
1808
1809 /* clear type-dependent unions */
1810 memset(s: &sdata->u, c: 0, n: sizeof(sdata->u));
1811 memset(s: &sdata->deflink.u, c: 0, n: sizeof(sdata->deflink.u));
1812
1813 /* and set some type-dependent values */
1814 sdata->vif.type = type;
1815 sdata->vif.p2p = false;
1816 sdata->wdev.iftype = type;
1817
1818 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1819 sdata->control_port_no_encrypt = false;
1820 sdata->control_port_over_nl80211 = false;
1821 sdata->control_port_no_preauth = false;
1822 sdata->vif.cfg.idle = true;
1823 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1824
1825 sdata->noack_map = 0;
1826
1827 /* only monitor/p2p-device differ */
1828 if (sdata->dev) {
1829 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1830 sdata->dev->type = ARPHRD_ETHER;
1831 }
1832
1833 skb_queue_head_init(list: &sdata->skb_queue);
1834 skb_queue_head_init(list: &sdata->status_queue);
1835 wiphy_work_init(work: &sdata->work, func: ieee80211_iface_work);
1836 wiphy_work_init(work: &sdata->activate_links_work,
1837 func: ieee80211_activate_links_work);
1838
1839 switch (type) {
1840 case NL80211_IFTYPE_P2P_GO:
1841 type = NL80211_IFTYPE_AP;
1842 sdata->vif.type = type;
1843 sdata->vif.p2p = true;
1844 fallthrough;
1845 case NL80211_IFTYPE_AP:
1846 skb_queue_head_init(list: &sdata->u.ap.ps.bc_buf);
1847 INIT_LIST_HEAD(list: &sdata->u.ap.vlans);
1848 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1849 break;
1850 case NL80211_IFTYPE_P2P_CLIENT:
1851 type = NL80211_IFTYPE_STATION;
1852 sdata->vif.type = type;
1853 sdata->vif.p2p = true;
1854 fallthrough;
1855 case NL80211_IFTYPE_STATION:
1856 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1857 ieee80211_sta_setup_sdata(sdata);
1858 break;
1859 case NL80211_IFTYPE_OCB:
1860 sdata->vif.bss_conf.bssid = bssid_wildcard;
1861 ieee80211_ocb_setup_sdata(sdata);
1862 break;
1863 case NL80211_IFTYPE_ADHOC:
1864 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1865 ieee80211_ibss_setup_sdata(sdata);
1866 break;
1867 case NL80211_IFTYPE_MESH_POINT:
1868 if (ieee80211_vif_is_mesh(vif: &sdata->vif))
1869 ieee80211_mesh_init_sdata(sdata);
1870 break;
1871 case NL80211_IFTYPE_MONITOR:
1872 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1873 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1874 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1875 MONITOR_FLAG_OTHER_BSS;
1876 break;
1877 case NL80211_IFTYPE_NAN:
1878 idr_init(idr: &sdata->u.nan.function_inst_ids);
1879 spin_lock_init(&sdata->u.nan.func_lock);
1880 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1881 break;
1882 case NL80211_IFTYPE_AP_VLAN:
1883 case NL80211_IFTYPE_P2P_DEVICE:
1884 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1885 break;
1886 case NL80211_IFTYPE_UNSPECIFIED:
1887 case NL80211_IFTYPE_WDS:
1888 case NUM_NL80211_IFTYPES:
1889 WARN_ON(1);
1890 break;
1891 }
1892
1893 /* need to do this after the switch so vif.type is correct */
1894 ieee80211_link_setup(link: &sdata->deflink);
1895
1896 ieee80211_debugfs_recreate_netdev(sdata, mld_vif: false);
1897}
1898
1899static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1900 enum nl80211_iftype type)
1901{
1902 struct ieee80211_local *local = sdata->local;
1903 int ret, err;
1904 enum nl80211_iftype internal_type = type;
1905 bool p2p = false;
1906
1907 ASSERT_RTNL();
1908
1909 if (!local->ops->change_interface)
1910 return -EBUSY;
1911
1912 /* for now, don't support changing while links exist */
1913 if (ieee80211_vif_is_mld(vif: &sdata->vif))
1914 return -EBUSY;
1915
1916 switch (sdata->vif.type) {
1917 case NL80211_IFTYPE_AP:
1918 if (!list_empty(head: &sdata->u.ap.vlans))
1919 return -EBUSY;
1920 break;
1921 case NL80211_IFTYPE_STATION:
1922 case NL80211_IFTYPE_ADHOC:
1923 case NL80211_IFTYPE_OCB:
1924 /*
1925 * Could maybe also all others here?
1926 * Just not sure how that interacts
1927 * with the RX/config path e.g. for
1928 * mesh.
1929 */
1930 break;
1931 default:
1932 return -EBUSY;
1933 }
1934
1935 switch (type) {
1936 case NL80211_IFTYPE_AP:
1937 case NL80211_IFTYPE_STATION:
1938 case NL80211_IFTYPE_ADHOC:
1939 case NL80211_IFTYPE_OCB:
1940 /*
1941 * Could probably support everything
1942 * but here.
1943 */
1944 break;
1945 case NL80211_IFTYPE_P2P_CLIENT:
1946 p2p = true;
1947 internal_type = NL80211_IFTYPE_STATION;
1948 break;
1949 case NL80211_IFTYPE_P2P_GO:
1950 p2p = true;
1951 internal_type = NL80211_IFTYPE_AP;
1952 break;
1953 default:
1954 return -EBUSY;
1955 }
1956
1957 ret = ieee80211_check_concurrent_iface(sdata, iftype: internal_type);
1958 if (ret)
1959 return ret;
1960
1961 ieee80211_stop_vif_queues(local, sdata,
1962 reason: IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1963 /* do_stop will synchronize_rcu() first thing */
1964 ieee80211_do_stop(sdata, going_down: false);
1965
1966 ieee80211_teardown_sdata(sdata);
1967
1968 ieee80211_set_sdata_offload_flags(sdata);
1969 ret = drv_change_interface(local, sdata, type: internal_type, p2p);
1970 if (ret)
1971 type = ieee80211_vif_type_p2p(vif: &sdata->vif);
1972
1973 /*
1974 * Ignore return value here, there's not much we can do since
1975 * the driver changed the interface type internally already.
1976 * The warnings will hopefully make driver authors fix it :-)
1977 */
1978 ieee80211_check_queues(sdata, iftype: type);
1979
1980 ieee80211_setup_sdata(sdata, type);
1981 ieee80211_set_vif_encap_ops(sdata);
1982
1983 err = ieee80211_do_open(wdev: &sdata->wdev, coming_up: false);
1984 WARN(err, "type change: do_open returned %d", err);
1985
1986 ieee80211_wake_vif_queues(local, sdata,
1987 reason: IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1988 return ret;
1989}
1990
1991int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1992 enum nl80211_iftype type)
1993{
1994 int ret;
1995
1996 ASSERT_RTNL();
1997
1998 if (type == ieee80211_vif_type_p2p(vif: &sdata->vif))
1999 return 0;
2000
2001 if (ieee80211_sdata_running(sdata)) {
2002 ret = ieee80211_runtime_change_iftype(sdata, type);
2003 if (ret)
2004 return ret;
2005 } else {
2006 /* Purge and reset type-dependent state. */
2007 ieee80211_teardown_sdata(sdata);
2008 ieee80211_setup_sdata(sdata, type);
2009 }
2010
2011 /* reset some values that shouldn't be kept across type changes */
2012 if (type == NL80211_IFTYPE_STATION)
2013 sdata->u.mgd.use_4addr = false;
2014
2015 return 0;
2016}
2017
2018static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
2019 u8 *perm_addr, enum nl80211_iftype type)
2020{
2021 struct ieee80211_sub_if_data *sdata;
2022 u64 mask, start, addr, val, inc;
2023 u8 *m;
2024 u8 tmp_addr[ETH_ALEN];
2025 int i;
2026
2027 lockdep_assert_wiphy(local->hw.wiphy);
2028
2029 /* default ... something at least */
2030 memcpy(to: perm_addr, from: local->hw.wiphy->perm_addr, ETH_ALEN);
2031
2032 if (is_zero_ether_addr(addr: local->hw.wiphy->addr_mask) &&
2033 local->hw.wiphy->n_addresses <= 1)
2034 return;
2035
2036 switch (type) {
2037 case NL80211_IFTYPE_MONITOR:
2038 /* doesn't matter */
2039 break;
2040 case NL80211_IFTYPE_AP_VLAN:
2041 /* match up with an AP interface */
2042 list_for_each_entry(sdata, &local->interfaces, list) {
2043 if (sdata->vif.type != NL80211_IFTYPE_AP)
2044 continue;
2045 memcpy(to: perm_addr, from: sdata->vif.addr, ETH_ALEN);
2046 break;
2047 }
2048 /* keep default if no AP interface present */
2049 break;
2050 case NL80211_IFTYPE_P2P_CLIENT:
2051 case NL80211_IFTYPE_P2P_GO:
2052 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
2053 list_for_each_entry(sdata, &local->interfaces, list) {
2054 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
2055 continue;
2056 if (!ieee80211_sdata_running(sdata))
2057 continue;
2058 memcpy(to: perm_addr, from: sdata->vif.addr, ETH_ALEN);
2059 return;
2060 }
2061 }
2062 fallthrough;
2063 default:
2064 /* assign a new address if possible -- try n_addresses first */
2065 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
2066 bool used = false;
2067
2068 list_for_each_entry(sdata, &local->interfaces, list) {
2069 if (ether_addr_equal(addr1: local->hw.wiphy->addresses[i].addr,
2070 addr2: sdata->vif.addr)) {
2071 used = true;
2072 break;
2073 }
2074 }
2075
2076 if (!used) {
2077 memcpy(to: perm_addr,
2078 from: local->hw.wiphy->addresses[i].addr,
2079 ETH_ALEN);
2080 break;
2081 }
2082 }
2083
2084 /* try mask if available */
2085 if (is_zero_ether_addr(addr: local->hw.wiphy->addr_mask))
2086 break;
2087
2088 m = local->hw.wiphy->addr_mask;
2089 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2090 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2091 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2092
2093 if (__ffs64(word: mask) + hweight64(mask) != fls64(x: mask)) {
2094 /* not a contiguous mask ... not handled now! */
2095 pr_info("not contiguous\n");
2096 break;
2097 }
2098
2099 /*
2100 * Pick address of existing interface in case user changed
2101 * MAC address manually, default to perm_addr.
2102 */
2103 m = local->hw.wiphy->perm_addr;
2104 list_for_each_entry(sdata, &local->interfaces, list) {
2105 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2106 continue;
2107 m = sdata->vif.addr;
2108 break;
2109 }
2110 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2111 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2112 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2113
2114 inc = 1ULL<<__ffs64(word: mask);
2115 val = (start & mask);
2116 addr = (start & ~mask) | (val & mask);
2117 do {
2118 bool used = false;
2119
2120 tmp_addr[5] = addr >> 0*8;
2121 tmp_addr[4] = addr >> 1*8;
2122 tmp_addr[3] = addr >> 2*8;
2123 tmp_addr[2] = addr >> 3*8;
2124 tmp_addr[1] = addr >> 4*8;
2125 tmp_addr[0] = addr >> 5*8;
2126
2127 val += inc;
2128
2129 list_for_each_entry(sdata, &local->interfaces, list) {
2130 if (ether_addr_equal(addr1: tmp_addr, addr2: sdata->vif.addr)) {
2131 used = true;
2132 break;
2133 }
2134 }
2135
2136 if (!used) {
2137 memcpy(to: perm_addr, from: tmp_addr, ETH_ALEN);
2138 break;
2139 }
2140 addr = (start & ~mask) | (val & mask);
2141 } while (addr != start);
2142
2143 break;
2144 }
2145}
2146
2147int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2148 unsigned char name_assign_type,
2149 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2150 struct vif_params *params)
2151{
2152 struct net_device *ndev = NULL;
2153 struct ieee80211_sub_if_data *sdata = NULL;
2154 struct txq_info *txqi;
2155 int ret, i;
2156
2157 ASSERT_RTNL();
2158 lockdep_assert_wiphy(local->hw.wiphy);
2159
2160 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2161 struct wireless_dev *wdev;
2162
2163 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2164 GFP_KERNEL);
2165 if (!sdata)
2166 return -ENOMEM;
2167 wdev = &sdata->wdev;
2168
2169 sdata->dev = NULL;
2170 strscpy(sdata->name, name, IFNAMSIZ);
2171 ieee80211_assign_perm_addr(local, perm_addr: wdev->address, type);
2172 memcpy(to: sdata->vif.addr, from: wdev->address, ETH_ALEN);
2173 ether_addr_copy(dst: sdata->vif.bss_conf.addr, src: sdata->vif.addr);
2174 } else {
2175 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2176 sizeof(void *));
2177 int txq_size = 0;
2178
2179 if (type != NL80211_IFTYPE_AP_VLAN &&
2180 (type != NL80211_IFTYPE_MONITOR ||
2181 (params->flags & MONITOR_FLAG_ACTIVE)))
2182 txq_size += sizeof(struct txq_info) +
2183 local->hw.txq_data_size;
2184
2185 ndev = alloc_netdev_mqs(sizeof_priv: size + txq_size,
2186 name, name_assign_type,
2187 setup: ieee80211_if_setup, txqs: 1, rxqs: 1);
2188 if (!ndev)
2189 return -ENOMEM;
2190
2191 dev_net_set(dev: ndev, net: wiphy_net(wiphy: local->hw.wiphy));
2192
2193 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2194
2195 ndev->needed_headroom = local->tx_headroom +
2196 4*6 /* four MAC addresses */
2197 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2198 + 6 /* mesh */
2199 + 8 /* rfc1042/bridge tunnel */
2200 - ETH_HLEN /* ethernet hard_header_len */
2201 + IEEE80211_ENCRYPT_HEADROOM;
2202 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2203
2204 ret = dev_alloc_name(dev: ndev, name: ndev->name);
2205 if (ret < 0) {
2206 free_netdev(dev: ndev);
2207 return ret;
2208 }
2209
2210 ieee80211_assign_perm_addr(local, perm_addr: ndev->perm_addr, type);
2211 if (is_valid_ether_addr(addr: params->macaddr))
2212 eth_hw_addr_set(dev: ndev, addr: params->macaddr);
2213 else
2214 eth_hw_addr_set(dev: ndev, addr: ndev->perm_addr);
2215 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2216
2217 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2218 sdata = netdev_priv(dev: ndev);
2219 ndev->ieee80211_ptr = &sdata->wdev;
2220 memcpy(to: sdata->vif.addr, from: ndev->dev_addr, ETH_ALEN);
2221 ether_addr_copy(dst: sdata->vif.bss_conf.addr, src: sdata->vif.addr);
2222 memcpy(to: sdata->name, from: ndev->name, IFNAMSIZ);
2223
2224 if (txq_size) {
2225 txqi = netdev_priv(dev: ndev) + size;
2226 ieee80211_txq_init(sdata, NULL, txq: txqi, tid: 0);
2227 }
2228
2229 sdata->dev = ndev;
2230 }
2231
2232 /* initialise type-independent data */
2233 sdata->wdev.wiphy = local->hw.wiphy;
2234
2235 ieee80211_sdata_init(local, sdata);
2236
2237 ieee80211_init_frag_cache(cache: &sdata->frags);
2238
2239 wiphy_delayed_work_init(dwork: &sdata->dec_tailroom_needed_wk,
2240 func: ieee80211_delayed_tailroom_dec);
2241
2242 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2243 struct ieee80211_supported_band *sband;
2244 sband = local->hw.wiphy->bands[i];
2245 sdata->rc_rateidx_mask[i] =
2246 sband ? (1 << sband->n_bitrates) - 1 : 0;
2247 if (sband) {
2248 __le16 cap;
2249 u16 *vht_rate_mask;
2250
2251 memcpy(to: sdata->rc_rateidx_mcs_mask[i],
2252 from: sband->ht_cap.mcs.rx_mask,
2253 len: sizeof(sdata->rc_rateidx_mcs_mask[i]));
2254
2255 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2256 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2257 ieee80211_get_vht_mask_from_cap(vht_cap: cap, vht_mask: vht_rate_mask);
2258 } else {
2259 memset(s: sdata->rc_rateidx_mcs_mask[i], c: 0,
2260 n: sizeof(sdata->rc_rateidx_mcs_mask[i]));
2261 memset(s: sdata->rc_rateidx_vht_mcs_mask[i], c: 0,
2262 n: sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2263 }
2264 }
2265
2266 ieee80211_set_default_queues(sdata);
2267
2268 /* setup type-dependent data */
2269 ieee80211_setup_sdata(sdata, type);
2270
2271 if (ndev) {
2272 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2273 if (type == NL80211_IFTYPE_STATION)
2274 sdata->u.mgd.use_4addr = params->use_4addr;
2275
2276 ndev->features |= local->hw.netdev_features;
2277 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2278 ndev->hw_features |= ndev->features &
2279 MAC80211_SUPPORTED_FEATURES_TX;
2280 sdata->vif.netdev_features = local->hw.netdev_features;
2281
2282 netdev_set_default_ethtool_ops(dev: ndev, ops: &ieee80211_ethtool_ops);
2283
2284 /* MTU range is normally 256 - 2304, where the upper limit is
2285 * the maximum MSDU size. Monitor interfaces send and receive
2286 * MPDU and A-MSDU frames which may be much larger so we do
2287 * not impose an upper limit in that case.
2288 */
2289 ndev->min_mtu = 256;
2290 if (type == NL80211_IFTYPE_MONITOR)
2291 ndev->max_mtu = 0;
2292 else
2293 ndev->max_mtu = local->hw.max_mtu;
2294
2295 ret = cfg80211_register_netdevice(dev: ndev);
2296 if (ret) {
2297 free_netdev(dev: ndev);
2298 return ret;
2299 }
2300 }
2301
2302 mutex_lock(lock: &local->iflist_mtx);
2303 list_add_tail_rcu(new: &sdata->list, head: &local->interfaces);
2304 mutex_unlock(lock: &local->iflist_mtx);
2305
2306 if (new_wdev)
2307 *new_wdev = &sdata->wdev;
2308
2309 return 0;
2310}
2311
2312void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2313{
2314 ASSERT_RTNL();
2315 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2316
2317 mutex_lock(lock: &sdata->local->iflist_mtx);
2318 list_del_rcu(entry: &sdata->list);
2319 mutex_unlock(lock: &sdata->local->iflist_mtx);
2320
2321 if (sdata->vif.txq)
2322 ieee80211_txq_purge(local: sdata->local, txqi: to_txq_info(txq: sdata->vif.txq));
2323
2324 synchronize_rcu();
2325
2326 cfg80211_unregister_wdev(wdev: &sdata->wdev);
2327
2328 if (!sdata->dev) {
2329 ieee80211_teardown_sdata(sdata);
2330 kfree(objp: sdata);
2331 }
2332}
2333
2334void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2335{
2336 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2337 return;
2338 ieee80211_do_stop(sdata, going_down: true);
2339}
2340
2341void ieee80211_remove_interfaces(struct ieee80211_local *local)
2342{
2343 struct ieee80211_sub_if_data *sdata, *tmp;
2344 LIST_HEAD(unreg_list);
2345
2346 ASSERT_RTNL();
2347
2348 /* Before destroying the interfaces, make sure they're all stopped so
2349 * that the hardware is stopped. Otherwise, the driver might still be
2350 * iterating the interfaces during the shutdown, e.g. from a worker
2351 * or from RX processing or similar, and if it does so (using atomic
2352 * iteration) while we're manipulating the list, the iteration will
2353 * crash.
2354 *
2355 * After this, the hardware should be stopped and the driver should
2356 * have stopped all of its activities, so that we can do RCU-unaware
2357 * manipulations of the interface list below.
2358 */
2359 cfg80211_shutdown_all_interfaces(wiphy: local->hw.wiphy);
2360
2361 guard(wiphy)(T: local->hw.wiphy);
2362
2363 WARN(local->open_count, "%s: open count remains %d\n",
2364 wiphy_name(local->hw.wiphy), local->open_count);
2365
2366 mutex_lock(lock: &local->iflist_mtx);
2367 list_splice_init(list: &local->interfaces, head: &unreg_list);
2368 mutex_unlock(lock: &local->iflist_mtx);
2369
2370 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2371 bool netdev = sdata->dev;
2372
2373 /*
2374 * Remove IP addresses explicitly, since the notifier will
2375 * skip the callbacks if wdev->registered is false, since
2376 * we can't acquire the wiphy_lock() again there if already
2377 * inside this locked section.
2378 */
2379 sdata->vif.cfg.arp_addr_cnt = 0;
2380 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2381 sdata->u.mgd.associated)
2382 ieee80211_vif_cfg_change_notify(sdata,
2383 changed: BSS_CHANGED_ARP_FILTER);
2384
2385 list_del(entry: &sdata->list);
2386 cfg80211_unregister_wdev(wdev: &sdata->wdev);
2387
2388 if (!netdev)
2389 kfree(objp: sdata);
2390 }
2391}
2392
2393static int netdev_notify(struct notifier_block *nb,
2394 unsigned long state, void *ptr)
2395{
2396 struct net_device *dev = netdev_notifier_info_to_dev(info: ptr);
2397 struct ieee80211_sub_if_data *sdata;
2398
2399 if (state != NETDEV_CHANGENAME)
2400 return NOTIFY_DONE;
2401
2402 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2403 return NOTIFY_DONE;
2404
2405 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2406 return NOTIFY_DONE;
2407
2408 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2409 memcpy(to: sdata->name, from: dev->name, IFNAMSIZ);
2410 ieee80211_debugfs_rename_netdev(sdata);
2411
2412 return NOTIFY_OK;
2413}
2414
2415static struct notifier_block mac80211_netdev_notifier = {
2416 .notifier_call = netdev_notify,
2417};
2418
2419int ieee80211_iface_init(void)
2420{
2421 return register_netdevice_notifier(nb: &mac80211_netdev_notifier);
2422}
2423
2424void ieee80211_iface_exit(void)
2425{
2426 unregister_netdevice_notifier(nb: &mac80211_netdev_notifier);
2427}
2428
2429void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2430{
2431 if (sdata->vif.type == NL80211_IFTYPE_AP)
2432 atomic_inc(v: &sdata->u.ap.num_mcast_sta);
2433 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2434 atomic_inc(v: &sdata->u.vlan.num_mcast_sta);
2435}
2436
2437void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2438{
2439 if (sdata->vif.type == NL80211_IFTYPE_AP)
2440 atomic_dec(v: &sdata->u.ap.num_mcast_sta);
2441 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2442 atomic_dec(v: &sdata->u.vlan.num_mcast_sta);
2443}
2444
2445void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
2446{
2447 struct ieee80211_local *local = sdata->local;
2448
2449 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
2450 return;
2451
2452 ieee80211_stop_vif_queues_norefcount(local, sdata,
2453 reason: IEEE80211_QUEUE_STOP_REASON_CSA);
2454}
2455
2456void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
2457{
2458 struct ieee80211_local *local = sdata->local;
2459
2460 ieee80211_wake_vif_queues_norefcount(local, sdata,
2461 reason: IEEE80211_QUEUE_STOP_REASON_CSA);
2462}
2463