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 case NL80211_IFTYPE_AP_VLAN:
489 ieee80211_apvlan_link_clear(sdata);
490 break;
491 default:
492 break;
493 }
494
495 /*
496 * Remove all stations associated with this interface.
497 *
498 * This must be done before calling ops->remove_interface()
499 * because otherwise we can later invoke ops->sta_notify()
500 * whenever the STAs are removed, and that invalidates driver
501 * assumptions about always getting a vif pointer that is valid
502 * (because if we remove a STA after ops->remove_interface()
503 * the driver will have removed the vif info already!)
504 *
505 * For AP_VLANs stations may exist since there's nothing else that
506 * would have removed them, but in other modes there shouldn't
507 * be any stations.
508 */
509 flushed = sta_info_flush(sdata, -1);
510 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
511
512 /* don't count this interface for allmulti while it is down */
513 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
514 atomic_dec(&local->iff_allmultis);
515
516 if (sdata->vif.type == NL80211_IFTYPE_AP) {
517 local->fif_pspoll--;
518 local->fif_probe_req--;
519 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
520 local->fif_probe_req--;
521 }
522
523 if (sdata->dev) {
524 netif_addr_lock_bh(sdata->dev);
525 spin_lock_bh(&local->filter_lock);
526 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
527 sdata->dev->addr_len);
528 spin_unlock_bh(&local->filter_lock);
529 netif_addr_unlock_bh(sdata->dev);
530 }
531
532 timer_delete_sync(&local->dynamic_ps_timer);
533 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
534
535 WARN(ieee80211_vif_is_mld(&sdata->vif),
536 "destroying interface with valid links 0x%04x\n",
537 sdata->vif.valid_links);
538
539 sdata->vif.bss_conf.csa_active = false;
540 if (sdata->vif.type == NL80211_IFTYPE_STATION)
541 sdata->deflink.u.mgd.csa.waiting_bcn = false;
542 ieee80211_vif_unblock_queues_csa(sdata);
543
544 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work);
545 wiphy_work_cancel(local->hw.wiphy,
546 &sdata->deflink.color_change_finalize_work);
547 wiphy_delayed_work_cancel(local->hw.wiphy,
548 &sdata->deflink.dfs_cac_timer_work);
549
550 if (sdata->wdev.links[0].cac_started) {
551 chandef = sdata->vif.bss_conf.chanreq.oper;
552 WARN_ON(local->suspended);
553 ieee80211_link_release_channel(&sdata->deflink);
554 cfg80211_cac_event(sdata->dev, &chandef,
555 NL80211_RADAR_CAC_ABORTED,
556 GFP_KERNEL, 0);
557 }
558
559 if (sdata->vif.type == NL80211_IFTYPE_AP) {
560 WARN_ON(!list_empty(&sdata->u.ap.vlans));
561 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
562 /* remove all packets in parent bc_buf pointing to this dev */
563 ps = &sdata->bss->ps;
564
565 spin_lock_irqsave(&ps->bc_buf.lock, flags);
566 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
567 if (skb->dev == sdata->dev) {
568 __skb_unlink(skb, &ps->bc_buf);
569 local->total_ps_buffered--;
570 ieee80211_free_txskb(&local->hw, skb);
571 }
572 }
573 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
574 }
575
576 if (going_down)
577 local->open_count--;
578
579 switch (sdata->vif.type) {
580 case NL80211_IFTYPE_AP_VLAN:
581 list_del(&sdata->u.vlan.list);
582 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
583 /* see comment in the default case below */
584 ieee80211_free_keys(sdata, true);
585 /* no need to tell driver */
586 break;
587 case NL80211_IFTYPE_MONITOR:
588 local->monitors--;
589
590 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
591 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
592
593 local->virt_monitors--;
594 if (local->virt_monitors == 0) {
595 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
596 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
597 }
598
599 ieee80211_adjust_monitor_flags(sdata, -1);
600 }
601 break;
602 case NL80211_IFTYPE_NAN:
603 /* clean all the functions */
604 spin_lock_bh(&sdata->u.nan.func_lock);
605
606 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
607 idr_remove(&sdata->u.nan.function_inst_ids, i);
608 cfg80211_free_nan_func(func);
609 }
610 idr_destroy(&sdata->u.nan.function_inst_ids);
611
612 spin_unlock_bh(&sdata->u.nan.func_lock);
613 break;
614 case NL80211_IFTYPE_P2P_DEVICE:
615 /* relies on synchronize_rcu() below */
616 RCU_INIT_POINTER(local->p2p_sdata, NULL);
617 fallthrough;
618 default:
619 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
620 /*
621 * When we get here, the interface is marked down.
622 * Free the remaining keys, if there are any
623 * (which can happen in AP mode if userspace sets
624 * keys before the interface is operating)
625 *
626 * Force the key freeing to always synchronize_net()
627 * to wait for the RX path in case it is using this
628 * interface enqueuing frames at this very time on
629 * another CPU.
630 */
631 ieee80211_free_keys(sdata, true);
632 skb_queue_purge(&sdata->skb_queue);
633 skb_queue_purge(&sdata->status_queue);
634 }
635
636 /*
637 * Since ieee80211_free_txskb() may issue __dev_queue_xmit()
638 * which should be called with interrupts enabled, reclamation
639 * is done in two phases:
640 */
641 __skb_queue_head_init(&freeq);
642
643 /* unlink from local queues... */
644 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
645 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
646 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
647 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
648 if (info->control.vif == &sdata->vif) {
649 __skb_unlink(skb, &local->pending[i]);
650 __skb_queue_tail(&freeq, skb);
651 }
652 }
653 }
654 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
655
656 /* ... and perform actual reclamation with interrupts enabled. */
657 skb_queue_walk_safe(&freeq, skb, tmp) {
658 __skb_unlink(skb, &freeq);
659 ieee80211_free_txskb(&local->hw, skb);
660 }
661
662 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
663 ieee80211_txq_remove_vlan(local, sdata);
664
665 if (sdata->vif.txq)
666 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
667
668 sdata->bss = NULL;
669
670 if (local->open_count == 0)
671 ieee80211_clear_tx_pending(local);
672
673 sdata->vif.bss_conf.beacon_int = 0;
674
675 /*
676 * If the interface goes down while suspended, presumably because
677 * the device was unplugged and that happens before our resume,
678 * then the driver is already unconfigured and the remainder of
679 * this function isn't needed.
680 * XXX: what about WoWLAN? If the device has software state, e.g.
681 * memory allocated, it might expect teardown commands from
682 * mac80211 here?
683 */
684 if (local->suspended) {
685 WARN_ON(local->wowlan);
686 WARN_ON(rcu_access_pointer(local->monitor_sdata));
687 return;
688 }
689
690 switch (sdata->vif.type) {
691 case NL80211_IFTYPE_AP_VLAN:
692 break;
693 case NL80211_IFTYPE_MONITOR:
694 if (local->virt_monitors == 0)
695 ieee80211_del_virtual_monitor(local);
696
697 ieee80211_recalc_idle(local);
698 ieee80211_recalc_offload(local);
699
700 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
701 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
702 break;
703
704 ieee80211_link_release_channel(&sdata->deflink);
705 fallthrough;
706 default:
707 if (!going_down)
708 break;
709 drv_remove_interface(local, sdata);
710
711 /* Clear private driver data to prevent reuse */
712 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size);
713 }
714
715 ieee80211_recalc_ps(local);
716
717 if (cancel_scan)
718 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
719
720 if (local->open_count == 0) {
721 ieee80211_stop_device(local, false);
722
723 /* no reconfiguring after stop! */
724 return;
725 }
726
727 /* do after stop to avoid reconfiguring when we stop anyway */
728 ieee80211_configure_filter(local);
729 ieee80211_hw_config(local, hw_reconf_flags);
730
731 if (local->virt_monitors == local->open_count)
732 ieee80211_add_virtual_monitor(local);
733 }
734
ieee80211_stop_mbssid(struct ieee80211_sub_if_data * sdata)735 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
736 {
737 struct ieee80211_sub_if_data *tx_sdata;
738 struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
739 struct ieee80211_link_data *tx_link, *link;
740 unsigned int link_id;
741
742 lockdep_assert_wiphy(sdata->local->hw.wiphy);
743
744 /* Check if any of the links of current sdata is an MBSSID. */
745 for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
746 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata);
747 if (!tx_bss_conf)
748 continue;
749
750 tx_sdata = vif_to_sdata(tx_bss_conf->vif);
751 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
752
753 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion
754 * while closing tx sdata at the end of outer loop below.
755 */
756 if (sdata != tx_sdata) {
757 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id],
758 tx_sdata);
759 if (!tx_link)
760 continue;
761
762 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL);
763 }
764
765 /* loop through sdatas to find if any of their links
766 * belong to same MBSSID set as the one getting deleted.
767 */
768 for_each_sdata_link(tx_sdata->local, link) {
769 struct ieee80211_sub_if_data *link_sdata = link->sdata;
770
771 if (link_sdata == sdata || link_sdata == tx_sdata ||
772 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf)
773 continue;
774
775 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL);
776
777 /* Remove all links of matching MLD until dynamic link
778 * removal can be supported.
779 */
780 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev,
781 GFP_KERNEL);
782 }
783
784 /* If we are not tx sdata, remove links of tx sdata and proceed */
785 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata))
786 cfg80211_stop_iface(tx_sdata->wdev.wiphy,
787 &tx_sdata->wdev, GFP_KERNEL);
788 }
789 }
790
ieee80211_stop(struct net_device * dev)791 static int ieee80211_stop(struct net_device *dev)
792 {
793 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
794
795 /* close dependent VLAN interfaces before locking wiphy */
796 if (sdata->vif.type == NL80211_IFTYPE_AP) {
797 struct ieee80211_sub_if_data *vlan, *tmpsdata;
798
799 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
800 u.vlan.list)
801 dev_close(vlan->dev);
802 }
803
804 guard(wiphy)(sdata->local->hw.wiphy);
805
806 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
807
808 /* Close the dependent MBSSID interfaces with wiphy lock as we may be
809 * terminating its partner links too in case of MLD.
810 */
811 if (sdata->vif.type == NL80211_IFTYPE_AP)
812 ieee80211_stop_mbssid(sdata);
813
814 ieee80211_do_stop(sdata, true);
815
816 return 0;
817 }
818
ieee80211_set_multicast_list(struct net_device * dev)819 static void ieee80211_set_multicast_list(struct net_device *dev)
820 {
821 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
822 struct ieee80211_local *local = sdata->local;
823 int allmulti, sdata_allmulti;
824
825 allmulti = !!(dev->flags & IFF_ALLMULTI);
826 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
827
828 if (allmulti != sdata_allmulti) {
829 if (dev->flags & IFF_ALLMULTI)
830 atomic_inc(&local->iff_allmultis);
831 else
832 atomic_dec(&local->iff_allmultis);
833 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
834 }
835
836 spin_lock_bh(&local->filter_lock);
837 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
838 spin_unlock_bh(&local->filter_lock);
839 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter);
840 }
841
842 /*
843 * Called when the netdev is removed or, by the code below, before
844 * the interface type changes.
845 */
ieee80211_teardown_sdata(struct ieee80211_sub_if_data * sdata)846 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
847 {
848 if (WARN_ON(!list_empty(&sdata->work.entry)))
849 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
850
851 /* free extra data */
852 ieee80211_free_keys(sdata, false);
853
854 ieee80211_debugfs_remove_netdev(sdata);
855
856 ieee80211_destroy_frag_cache(&sdata->frags);
857
858 if (ieee80211_vif_is_mesh(&sdata->vif))
859 ieee80211_mesh_teardown_sdata(sdata);
860
861 ieee80211_vif_clear_links(sdata);
862 ieee80211_link_stop(&sdata->deflink);
863 }
864
ieee80211_uninit(struct net_device * dev)865 static void ieee80211_uninit(struct net_device *dev)
866 {
867 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
868 }
869
ieee80211_netdev_setup_tc(struct net_device * dev,enum tc_setup_type type,void * type_data)870 static int ieee80211_netdev_setup_tc(struct net_device *dev,
871 enum tc_setup_type type, void *type_data)
872 {
873 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
874 struct ieee80211_local *local = sdata->local;
875
876 return drv_net_setup_tc(local, sdata, dev, type, type_data);
877 }
878
879 static const struct net_device_ops ieee80211_dataif_ops = {
880 .ndo_open = ieee80211_open,
881 .ndo_stop = ieee80211_stop,
882 .ndo_uninit = ieee80211_uninit,
883 .ndo_start_xmit = ieee80211_subif_start_xmit,
884 .ndo_set_rx_mode = ieee80211_set_multicast_list,
885 .ndo_set_mac_address = ieee80211_change_mac,
886 .ndo_setup_tc = ieee80211_netdev_setup_tc,
887 };
888
ieee80211_monitor_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)889 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
890 struct sk_buff *skb,
891 struct net_device *sb_dev)
892 {
893 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
894 struct ieee80211_local *local = sdata->local;
895 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
896 struct ieee80211_hdr *hdr;
897 int len_rthdr;
898
899 if (local->hw.queues < IEEE80211_NUM_ACS)
900 return 0;
901
902 /* reset flags and info before parsing radiotap header */
903 memset(info, 0, sizeof(*info));
904
905 if (!ieee80211_parse_tx_radiotap(skb, dev))
906 return 0; /* doesn't matter, frame will be dropped */
907
908 len_rthdr = ieee80211_get_radiotap_len(skb->data);
909 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
910 if (skb->len < len_rthdr + 2 ||
911 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
912 return 0; /* doesn't matter, frame will be dropped */
913
914 return ieee80211_select_queue_80211(sdata, skb, hdr);
915 }
916
917 static const struct net_device_ops ieee80211_monitorif_ops = {
918 .ndo_open = ieee80211_open,
919 .ndo_stop = ieee80211_stop,
920 .ndo_uninit = ieee80211_uninit,
921 .ndo_start_xmit = ieee80211_monitor_start_xmit,
922 .ndo_set_rx_mode = ieee80211_set_multicast_list,
923 .ndo_set_mac_address = ieee80211_change_mac,
924 .ndo_select_queue = ieee80211_monitor_select_queue,
925 };
926
ieee80211_netdev_fill_forward_path(struct net_device_path_ctx * ctx,struct net_device_path * path)927 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
928 struct net_device_path *path)
929 {
930 struct ieee80211_sub_if_data *sdata;
931 struct ieee80211_local *local;
932 struct sta_info *sta;
933 int ret = -ENOENT;
934
935 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
936 local = sdata->local;
937
938 if (!local->ops->net_fill_forward_path)
939 return -EOPNOTSUPP;
940
941 rcu_read_lock();
942 switch (sdata->vif.type) {
943 case NL80211_IFTYPE_AP_VLAN:
944 sta = rcu_dereference(sdata->u.vlan.sta);
945 if (sta)
946 break;
947 if (sdata->wdev.use_4addr)
948 goto out;
949 if (is_multicast_ether_addr(ctx->daddr))
950 goto out;
951 sta = sta_info_get_bss(sdata, ctx->daddr);
952 break;
953 case NL80211_IFTYPE_AP:
954 if (is_multicast_ether_addr(ctx->daddr))
955 goto out;
956 sta = sta_info_get(sdata, ctx->daddr);
957 break;
958 case NL80211_IFTYPE_STATION:
959 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
960 sta = sta_info_get(sdata, ctx->daddr);
961 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
962 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
963 goto out;
964
965 break;
966 }
967 }
968
969 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
970 break;
971 default:
972 goto out;
973 }
974
975 if (!sta)
976 goto out;
977
978 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
979 out:
980 rcu_read_unlock();
981
982 return ret;
983 }
984
985 static const struct net_device_ops ieee80211_dataif_8023_ops = {
986 .ndo_open = ieee80211_open,
987 .ndo_stop = ieee80211_stop,
988 .ndo_uninit = ieee80211_uninit,
989 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
990 .ndo_set_rx_mode = ieee80211_set_multicast_list,
991 .ndo_set_mac_address = ieee80211_change_mac,
992 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
993 .ndo_setup_tc = ieee80211_netdev_setup_tc,
994 };
995
ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)996 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
997 {
998 switch (iftype) {
999 /* P2P GO and client are mapped to AP/STATION types */
1000 case NL80211_IFTYPE_AP:
1001 case NL80211_IFTYPE_STATION:
1002 return true;
1003 default:
1004 return false;
1005 }
1006 }
1007
ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data * sdata)1008 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
1009 {
1010 struct ieee80211_local *local = sdata->local;
1011 u32 flags;
1012
1013 flags = sdata->vif.offload_flags;
1014
1015 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
1016 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1017 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
1018
1019 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1020 local->hw.wiphy->frag_threshold != (u32)-1)
1021 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1022
1023 if (local->virt_monitors)
1024 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1025 } else {
1026 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1027 }
1028
1029 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
1030 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1031 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
1032
1033 if (local->virt_monitors &&
1034 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
1035 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1036 } else {
1037 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1038 }
1039
1040 if (sdata->vif.offload_flags == flags)
1041 return false;
1042
1043 sdata->vif.offload_flags = flags;
1044 ieee80211_check_fast_rx_iface(sdata);
1045 return true;
1046 }
1047
ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data * sdata)1048 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1049 {
1050 struct ieee80211_local *local = sdata->local;
1051 struct ieee80211_sub_if_data *bss = sdata;
1052 bool enabled;
1053
1054 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1055 if (!sdata->bss)
1056 return;
1057
1058 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1059 }
1060
1061 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1062 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1063 return;
1064
1065 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1066 if (sdata->wdev.use_4addr &&
1067 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1068 enabled = false;
1069
1070 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1071 &ieee80211_dataif_ops;
1072 }
1073
ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data * sdata)1074 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1075 {
1076 struct ieee80211_local *local = sdata->local;
1077 struct ieee80211_sub_if_data *vsdata;
1078
1079 if (ieee80211_set_sdata_offload_flags(sdata)) {
1080 drv_update_vif_offload(local, sdata);
1081 ieee80211_set_vif_encap_ops(sdata);
1082 }
1083
1084 list_for_each_entry(vsdata, &local->interfaces, list) {
1085 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1086 vsdata->bss != &sdata->u.ap)
1087 continue;
1088
1089 ieee80211_set_vif_encap_ops(vsdata);
1090 }
1091 }
1092
ieee80211_recalc_offload(struct ieee80211_local * local)1093 void ieee80211_recalc_offload(struct ieee80211_local *local)
1094 {
1095 struct ieee80211_sub_if_data *sdata;
1096
1097 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1098 return;
1099
1100 lockdep_assert_wiphy(local->hw.wiphy);
1101
1102 list_for_each_entry(sdata, &local->interfaces, list) {
1103 if (!ieee80211_sdata_running(sdata))
1104 continue;
1105
1106 ieee80211_recalc_sdata_offload(sdata);
1107 }
1108 }
1109
ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data * sdata,const int offset)1110 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1111 const int offset)
1112 {
1113 struct ieee80211_local *local = sdata->local;
1114 u32 flags = sdata->u.mntr.flags;
1115
1116 #define ADJUST(_f, _s) do { \
1117 if (flags & MONITOR_FLAG_##_f) \
1118 local->fif_##_s += offset; \
1119 } while (0)
1120
1121 ADJUST(FCSFAIL, fcsfail);
1122 ADJUST(PLCPFAIL, plcpfail);
1123 ADJUST(CONTROL, control);
1124 ADJUST(CONTROL, pspoll);
1125 ADJUST(OTHER_BSS, other_bss);
1126 if (!(flags & MONITOR_FLAG_SKIP_TX))
1127 local->tx_mntrs += offset;
1128
1129 #undef ADJUST
1130 }
1131
ieee80211_set_default_queues(struct ieee80211_sub_if_data * sdata)1132 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1133 {
1134 struct ieee80211_local *local = sdata->local;
1135 int i;
1136
1137 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1138 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1139 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1140 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1141 sdata->vif.hw_queue[i] = i;
1142 else
1143 sdata->vif.hw_queue[i] = 0;
1144 }
1145 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1146 }
1147
ieee80211_sdata_init(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1148 static void ieee80211_sdata_init(struct ieee80211_local *local,
1149 struct ieee80211_sub_if_data *sdata)
1150 {
1151 sdata->local = local;
1152
1153 /*
1154 * Initialize the default link, so we can use link_id 0 for non-MLD,
1155 * and that continues to work for non-MLD-aware drivers that use just
1156 * vif.bss_conf instead of vif.link_conf.
1157 *
1158 * Note that we never change this, so if link ID 0 isn't used in an
1159 * MLD connection, we get a separate allocation for it.
1160 */
1161 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1162 }
1163
ieee80211_add_virtual_monitor(struct ieee80211_local * local)1164 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1165 {
1166 struct ieee80211_sub_if_data *sdata;
1167 int ret;
1168
1169 ASSERT_RTNL();
1170 lockdep_assert_wiphy(local->hw.wiphy);
1171
1172 if (local->monitor_sdata ||
1173 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1174 return 0;
1175
1176 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1177 if (!sdata)
1178 return -ENOMEM;
1179
1180 /* set up data */
1181 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1182 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1183 wiphy_name(local->hw.wiphy));
1184 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1185 sdata->wdev.wiphy = local->hw.wiphy;
1186
1187 ieee80211_sdata_init(local, sdata);
1188
1189 ieee80211_set_default_queues(sdata);
1190
1191 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1192 ret = drv_add_interface(local, sdata);
1193 if (WARN_ON(ret)) {
1194 /* ok .. stupid driver, it asked for this! */
1195 kfree(sdata);
1196 return ret;
1197 }
1198 }
1199
1200 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1201
1202 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1203 if (ret) {
1204 kfree(sdata);
1205 return ret;
1206 }
1207
1208 mutex_lock(&local->iflist_mtx);
1209 rcu_assign_pointer(local->monitor_sdata, sdata);
1210 mutex_unlock(&local->iflist_mtx);
1211
1212 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq,
1213 IEEE80211_CHANCTX_EXCLUSIVE);
1214 if (ret) {
1215 mutex_lock(&local->iflist_mtx);
1216 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1217 mutex_unlock(&local->iflist_mtx);
1218 synchronize_net();
1219 drv_remove_interface(local, sdata);
1220 kfree(sdata);
1221 return ret;
1222 }
1223
1224 skb_queue_head_init(&sdata->skb_queue);
1225 skb_queue_head_init(&sdata->status_queue);
1226 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1227
1228 return 0;
1229 }
1230
ieee80211_del_virtual_monitor(struct ieee80211_local * local)1231 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1232 {
1233 struct ieee80211_sub_if_data *sdata;
1234
1235 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1236 return;
1237
1238 ASSERT_RTNL();
1239 lockdep_assert_wiphy(local->hw.wiphy);
1240
1241 mutex_lock(&local->iflist_mtx);
1242
1243 sdata = rcu_dereference_protected(local->monitor_sdata,
1244 lockdep_is_held(&local->iflist_mtx));
1245 if (!sdata) {
1246 mutex_unlock(&local->iflist_mtx);
1247 return;
1248 }
1249
1250 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1251 ieee80211_link_release_channel(&sdata->deflink);
1252
1253 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1254 drv_remove_interface(local, sdata);
1255
1256 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1257 mutex_unlock(&local->iflist_mtx);
1258
1259 synchronize_net();
1260
1261 kfree(sdata);
1262 }
1263
1264 /*
1265 * NOTE: Be very careful when changing this function, it must NOT return
1266 * an error on interface type changes that have been pre-checked, so most
1267 * checks should be in ieee80211_check_concurrent_iface.
1268 */
ieee80211_do_open(struct wireless_dev * wdev,bool coming_up)1269 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1270 {
1271 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1272 struct net_device *dev = wdev->netdev;
1273 struct ieee80211_local *local = sdata->local;
1274 u64 changed = 0;
1275 int res;
1276 u32 hw_reconf_flags = 0;
1277
1278 lockdep_assert_wiphy(local->hw.wiphy);
1279
1280 switch (sdata->vif.type) {
1281 case NL80211_IFTYPE_AP_VLAN: {
1282 struct ieee80211_sub_if_data *master;
1283
1284 if (!sdata->bss)
1285 return -ENOLINK;
1286
1287 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1288
1289 master = container_of(sdata->bss,
1290 struct ieee80211_sub_if_data, u.ap);
1291 sdata->control_port_protocol =
1292 master->control_port_protocol;
1293 sdata->control_port_no_encrypt =
1294 master->control_port_no_encrypt;
1295 sdata->control_port_over_nl80211 =
1296 master->control_port_over_nl80211;
1297 sdata->control_port_no_preauth =
1298 master->control_port_no_preauth;
1299 sdata->vif.cab_queue = master->vif.cab_queue;
1300 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1301 sizeof(sdata->vif.hw_queue));
1302 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq;
1303
1304 sdata->crypto_tx_tailroom_needed_cnt +=
1305 master->crypto_tx_tailroom_needed_cnt;
1306
1307 ieee80211_apvlan_link_setup(sdata);
1308
1309 break;
1310 }
1311 case NL80211_IFTYPE_AP:
1312 sdata->bss = &sdata->u.ap;
1313 break;
1314 case NL80211_IFTYPE_MESH_POINT:
1315 case NL80211_IFTYPE_STATION:
1316 case NL80211_IFTYPE_MONITOR:
1317 case NL80211_IFTYPE_ADHOC:
1318 case NL80211_IFTYPE_P2P_DEVICE:
1319 case NL80211_IFTYPE_OCB:
1320 case NL80211_IFTYPE_NAN:
1321 /* no special treatment */
1322 break;
1323 case NL80211_IFTYPE_UNSPECIFIED:
1324 case NUM_NL80211_IFTYPES:
1325 case NL80211_IFTYPE_P2P_CLIENT:
1326 case NL80211_IFTYPE_P2P_GO:
1327 case NL80211_IFTYPE_WDS:
1328 /* cannot happen */
1329 WARN_ON(1);
1330 break;
1331 }
1332
1333 if (local->open_count == 0) {
1334 /* here we can consider everything in good order (again) */
1335 local->reconfig_failure = false;
1336
1337 res = drv_start(local);
1338 if (res)
1339 goto err_del_bss;
1340 ieee80211_led_radio(local, true);
1341 ieee80211_mod_tpt_led_trig(local,
1342 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1343 }
1344
1345 /*
1346 * Copy the hopefully now-present MAC address to
1347 * this interface, if it has the special null one.
1348 */
1349 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1350 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1351 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1352
1353 if (!is_valid_ether_addr(dev->dev_addr)) {
1354 res = -EADDRNOTAVAIL;
1355 goto err_stop;
1356 }
1357 }
1358
1359 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
1360 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
1361 switch (sdata->vif.type) {
1362 case NL80211_IFTYPE_AP_VLAN:
1363 /* no need to tell driver, but set carrier and chanctx */
1364 if (sdata->bss->active) {
1365 struct ieee80211_link_data *link;
1366
1367 for_each_link_data(sdata, link) {
1368 ieee80211_link_vlan_copy_chanctx(link);
1369 }
1370
1371 netif_carrier_on(dev);
1372 ieee80211_set_vif_encap_ops(sdata);
1373 } else {
1374 netif_carrier_off(dev);
1375 }
1376 break;
1377 case NL80211_IFTYPE_MONITOR:
1378 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1379 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
1380 res = drv_add_interface(local, sdata);
1381 if (res)
1382 goto err_stop;
1383 } else {
1384 if (local->virt_monitors == 0 && local->open_count == 0) {
1385 res = ieee80211_add_virtual_monitor(local);
1386 if (res)
1387 goto err_stop;
1388 }
1389 local->virt_monitors++;
1390
1391 /* must be before the call to ieee80211_configure_filter */
1392 if (local->virt_monitors == 1) {
1393 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1394 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1395 }
1396 }
1397
1398 local->monitors++;
1399
1400 ieee80211_adjust_monitor_flags(sdata, 1);
1401 ieee80211_configure_filter(local);
1402 ieee80211_recalc_offload(local);
1403 ieee80211_recalc_idle(local);
1404
1405 netif_carrier_on(dev);
1406 break;
1407 default:
1408 if (coming_up) {
1409 ieee80211_del_virtual_monitor(local);
1410 ieee80211_set_sdata_offload_flags(sdata);
1411
1412 res = drv_add_interface(local, sdata);
1413 if (res)
1414 goto err_stop;
1415
1416 ieee80211_set_vif_encap_ops(sdata);
1417 res = ieee80211_check_queues(sdata,
1418 ieee80211_vif_type_p2p(&sdata->vif));
1419 if (res)
1420 goto err_del_interface;
1421 }
1422
1423 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1424 local->fif_pspoll++;
1425 local->fif_probe_req++;
1426
1427 ieee80211_configure_filter(local);
1428 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1429 local->fif_probe_req++;
1430 }
1431
1432 if (sdata->vif.probe_req_reg)
1433 drv_config_iface_filter(local, sdata,
1434 FIF_PROBE_REQ,
1435 FIF_PROBE_REQ);
1436
1437 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1438 sdata->vif.type != NL80211_IFTYPE_NAN)
1439 changed |= ieee80211_reset_erp_info(sdata);
1440 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1441 changed);
1442
1443 switch (sdata->vif.type) {
1444 case NL80211_IFTYPE_STATION:
1445 case NL80211_IFTYPE_ADHOC:
1446 case NL80211_IFTYPE_AP:
1447 case NL80211_IFTYPE_MESH_POINT:
1448 case NL80211_IFTYPE_OCB:
1449 netif_carrier_off(dev);
1450 break;
1451 case NL80211_IFTYPE_P2P_DEVICE:
1452 case NL80211_IFTYPE_NAN:
1453 break;
1454 default:
1455 /* not reached */
1456 WARN_ON(1);
1457 }
1458
1459 /*
1460 * Set default queue parameters so drivers don't
1461 * need to initialise the hardware if the hardware
1462 * doesn't start up with sane defaults.
1463 * Enable QoS for anything but station interfaces.
1464 */
1465 ieee80211_set_wmm_default(&sdata->deflink, true,
1466 sdata->vif.type != NL80211_IFTYPE_STATION);
1467 }
1468
1469 switch (sdata->vif.type) {
1470 case NL80211_IFTYPE_P2P_DEVICE:
1471 rcu_assign_pointer(local->p2p_sdata, sdata);
1472 break;
1473 case NL80211_IFTYPE_MONITOR:
1474 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1475 break;
1476 default:
1477 break;
1478 }
1479
1480 /*
1481 * set_multicast_list will be invoked by the networking core
1482 * which will check whether any increments here were done in
1483 * error and sync them down to the hardware as filter flags.
1484 */
1485 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1486 atomic_inc(&local->iff_allmultis);
1487
1488 if (coming_up)
1489 local->open_count++;
1490
1491 if (local->open_count == 1)
1492 ieee80211_hw_conf_init(local);
1493 else if (hw_reconf_flags)
1494 ieee80211_hw_config(local, hw_reconf_flags);
1495
1496 ieee80211_recalc_ps(local);
1497
1498 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1499
1500 return 0;
1501 err_del_interface:
1502 drv_remove_interface(local, sdata);
1503 err_stop:
1504 if (!local->open_count)
1505 drv_stop(local, false);
1506 err_del_bss:
1507 sdata->bss = NULL;
1508 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1509 list_del(&sdata->u.vlan.list);
1510 /* might already be clear but that doesn't matter */
1511 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1512 return res;
1513 }
1514
ieee80211_if_setup(struct net_device * dev)1515 static void ieee80211_if_setup(struct net_device *dev)
1516 {
1517 ether_setup(dev);
1518 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1519 dev->priv_flags |= IFF_NO_QUEUE;
1520 dev->netdev_ops = &ieee80211_dataif_ops;
1521 dev->needs_free_netdev = true;
1522 }
1523
ieee80211_iface_process_skb(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1524 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1525 struct ieee80211_sub_if_data *sdata,
1526 struct sk_buff *skb)
1527 {
1528 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1529
1530 lockdep_assert_wiphy(local->hw.wiphy);
1531
1532 if (ieee80211_is_action(mgmt->frame_control) &&
1533 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1534 struct sta_info *sta;
1535 int len = skb->len;
1536
1537 sta = sta_info_get_bss(sdata, mgmt->sa);
1538 if (sta) {
1539 switch (mgmt->u.action.u.addba_req.action_code) {
1540 case WLAN_ACTION_ADDBA_REQ:
1541 ieee80211_process_addba_request(local, sta,
1542 mgmt, len);
1543 break;
1544 case WLAN_ACTION_ADDBA_RESP:
1545 ieee80211_process_addba_resp(local, sta,
1546 mgmt, len);
1547 break;
1548 case WLAN_ACTION_DELBA:
1549 ieee80211_process_delba(sdata, sta,
1550 mgmt, len);
1551 break;
1552 default:
1553 WARN_ON(1);
1554 break;
1555 }
1556 }
1557 } else if (ieee80211_is_action(mgmt->frame_control) &&
1558 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1559 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1560 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1561 struct ieee80211_rx_status *status;
1562 enum nl80211_band band;
1563 struct sta_info *sta;
1564 u8 opmode;
1565
1566 status = IEEE80211_SKB_RXCB(skb);
1567 band = status->band;
1568 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1569
1570 sta = sta_info_get_bss(sdata, mgmt->sa);
1571
1572 if (sta)
1573 ieee80211_vht_handle_opmode(sdata,
1574 &sta->deflink,
1575 opmode, band);
1576
1577 break;
1578 }
1579 case WLAN_VHT_ACTION_GROUPID_MGMT:
1580 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1581 mgmt);
1582 break;
1583 default:
1584 WARN_ON(1);
1585 break;
1586 }
1587 } else if (ieee80211_is_action(mgmt->frame_control) &&
1588 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1589 switch (mgmt->u.action.u.s1g.action_code) {
1590 case WLAN_S1G_TWT_TEARDOWN:
1591 case WLAN_S1G_TWT_SETUP:
1592 ieee80211_s1g_rx_twt_action(sdata, skb);
1593 break;
1594 default:
1595 break;
1596 }
1597 } else if (ieee80211_is_action(mgmt->frame_control) &&
1598 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) {
1599 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1600 switch (mgmt->u.action.u.ttlm_req.action_code) {
1601 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
1602 ieee80211_process_neg_ttlm_req(sdata, mgmt,
1603 skb->len);
1604 break;
1605 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
1606 ieee80211_process_neg_ttlm_res(sdata, mgmt,
1607 skb->len);
1608 break;
1609 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
1610 ieee80211_process_ttlm_teardown(sdata);
1611 break;
1612 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
1613 ieee80211_process_ml_reconf_resp(sdata, mgmt,
1614 skb->len);
1615 break;
1616 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
1617 ieee80211_process_epcs_ena_resp(sdata, mgmt,
1618 skb->len);
1619 break;
1620 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
1621 ieee80211_process_epcs_teardown(sdata, mgmt,
1622 skb->len);
1623 break;
1624 default:
1625 break;
1626 }
1627 }
1628 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1629 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1630 ieee80211_sta_rx_queued_ext(sdata, skb);
1631 else
1632 WARN_ON(1);
1633 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1634 struct ieee80211_hdr *hdr = (void *)mgmt;
1635 struct sta_info *sta;
1636
1637 /*
1638 * So the frame isn't mgmt, but frame_control
1639 * is at the right place anyway, of course, so
1640 * the if statement is correct.
1641 *
1642 * Warn if we have other data frame types here,
1643 * they must not get here.
1644 */
1645 WARN_ON(hdr->frame_control &
1646 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1647 WARN_ON(!(hdr->seq_ctrl &
1648 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1649 /*
1650 * This was a fragment of a frame, received while
1651 * a block-ack session was active. That cannot be
1652 * right, so terminate the session.
1653 */
1654 sta = sta_info_get_bss(sdata, mgmt->sa);
1655 if (sta) {
1656 u16 tid = ieee80211_get_tid(hdr);
1657
1658 __ieee80211_stop_rx_ba_session(
1659 sta, tid, WLAN_BACK_RECIPIENT,
1660 WLAN_REASON_QSTA_REQUIRE_SETUP,
1661 true);
1662 }
1663 } else switch (sdata->vif.type) {
1664 case NL80211_IFTYPE_STATION:
1665 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1666 break;
1667 case NL80211_IFTYPE_ADHOC:
1668 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1669 break;
1670 case NL80211_IFTYPE_MESH_POINT:
1671 if (!ieee80211_vif_is_mesh(&sdata->vif))
1672 break;
1673 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1674 break;
1675 default:
1676 WARN(1, "frame for unexpected interface type");
1677 break;
1678 }
1679 }
1680
ieee80211_iface_process_status(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1681 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1682 struct sk_buff *skb)
1683 {
1684 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1685
1686 if (ieee80211_is_action(mgmt->frame_control) &&
1687 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1688 switch (mgmt->u.action.u.s1g.action_code) {
1689 case WLAN_S1G_TWT_TEARDOWN:
1690 case WLAN_S1G_TWT_SETUP:
1691 ieee80211_s1g_status_twt_action(sdata, skb);
1692 break;
1693 default:
1694 break;
1695 }
1696 }
1697 }
1698
ieee80211_iface_work(struct wiphy * wiphy,struct wiphy_work * work)1699 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1700 {
1701 struct ieee80211_sub_if_data *sdata =
1702 container_of(work, struct ieee80211_sub_if_data, work);
1703 struct ieee80211_local *local = sdata->local;
1704 struct sk_buff *skb;
1705
1706 if (!ieee80211_sdata_running(sdata))
1707 return;
1708
1709 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1710 return;
1711
1712 if (!ieee80211_can_run_worker(local))
1713 return;
1714
1715 /* first process frames */
1716 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1717 kcov_remote_start_common(skb_get_kcov_handle(skb));
1718
1719 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1720 ieee80211_process_tdls_channel_switch(sdata, skb);
1721 else
1722 ieee80211_iface_process_skb(local, sdata, skb);
1723
1724 kfree_skb(skb);
1725 kcov_remote_stop();
1726 }
1727
1728 /* process status queue */
1729 while ((skb = skb_dequeue(&sdata->status_queue))) {
1730 kcov_remote_start_common(skb_get_kcov_handle(skb));
1731
1732 ieee80211_iface_process_status(sdata, skb);
1733 kfree_skb(skb);
1734
1735 kcov_remote_stop();
1736 }
1737
1738 /* then other type-dependent work */
1739 switch (sdata->vif.type) {
1740 case NL80211_IFTYPE_STATION:
1741 ieee80211_sta_work(sdata);
1742 break;
1743 case NL80211_IFTYPE_ADHOC:
1744 ieee80211_ibss_work(sdata);
1745 break;
1746 case NL80211_IFTYPE_MESH_POINT:
1747 if (!ieee80211_vif_is_mesh(&sdata->vif))
1748 break;
1749 ieee80211_mesh_work(sdata);
1750 break;
1751 case NL80211_IFTYPE_OCB:
1752 ieee80211_ocb_work(sdata);
1753 break;
1754 default:
1755 break;
1756 }
1757 }
1758
ieee80211_activate_links_work(struct wiphy * wiphy,struct wiphy_work * work)1759 static void ieee80211_activate_links_work(struct wiphy *wiphy,
1760 struct wiphy_work *work)
1761 {
1762 struct ieee80211_sub_if_data *sdata =
1763 container_of(work, struct ieee80211_sub_if_data,
1764 activate_links_work);
1765 struct ieee80211_local *local = wiphy_priv(wiphy);
1766
1767 if (local->in_reconfig)
1768 return;
1769
1770 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1771 sdata->desired_active_links = 0;
1772 }
1773
1774 /*
1775 * Helper function to initialise an interface to a specific type.
1776 */
ieee80211_setup_sdata(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1777 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1778 enum nl80211_iftype type)
1779 {
1780 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1781 0xff, 0xff, 0xff};
1782
1783 /* clear type-dependent unions */
1784 memset(&sdata->u, 0, sizeof(sdata->u));
1785 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1786
1787 /* and set some type-dependent values */
1788 sdata->vif.type = type;
1789 sdata->vif.p2p = false;
1790 sdata->wdev.iftype = type;
1791
1792 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1793 sdata->control_port_no_encrypt = false;
1794 sdata->control_port_over_nl80211 = false;
1795 sdata->control_port_no_preauth = false;
1796 sdata->vif.cfg.idle = true;
1797 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1798
1799 sdata->noack_map = 0;
1800
1801 /* only monitor/p2p-device differ */
1802 if (sdata->dev) {
1803 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1804 sdata->dev->type = ARPHRD_ETHER;
1805 }
1806
1807 skb_queue_head_init(&sdata->skb_queue);
1808 skb_queue_head_init(&sdata->status_queue);
1809 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1810 wiphy_work_init(&sdata->activate_links_work,
1811 ieee80211_activate_links_work);
1812
1813 switch (type) {
1814 case NL80211_IFTYPE_P2P_GO:
1815 type = NL80211_IFTYPE_AP;
1816 sdata->vif.type = type;
1817 sdata->vif.p2p = true;
1818 fallthrough;
1819 case NL80211_IFTYPE_AP:
1820 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1821 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1822 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1823 break;
1824 case NL80211_IFTYPE_P2P_CLIENT:
1825 type = NL80211_IFTYPE_STATION;
1826 sdata->vif.type = type;
1827 sdata->vif.p2p = true;
1828 fallthrough;
1829 case NL80211_IFTYPE_STATION:
1830 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1831 ieee80211_sta_setup_sdata(sdata);
1832 break;
1833 case NL80211_IFTYPE_OCB:
1834 sdata->vif.bss_conf.bssid = bssid_wildcard;
1835 ieee80211_ocb_setup_sdata(sdata);
1836 break;
1837 case NL80211_IFTYPE_ADHOC:
1838 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1839 ieee80211_ibss_setup_sdata(sdata);
1840 break;
1841 case NL80211_IFTYPE_MESH_POINT:
1842 if (ieee80211_vif_is_mesh(&sdata->vif))
1843 ieee80211_mesh_init_sdata(sdata);
1844 break;
1845 case NL80211_IFTYPE_MONITOR:
1846 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1847 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1848 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1849 MONITOR_FLAG_OTHER_BSS;
1850 break;
1851 case NL80211_IFTYPE_NAN:
1852 idr_init(&sdata->u.nan.function_inst_ids);
1853 spin_lock_init(&sdata->u.nan.func_lock);
1854 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1855 break;
1856 case NL80211_IFTYPE_AP_VLAN:
1857 case NL80211_IFTYPE_P2P_DEVICE:
1858 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1859 break;
1860 case NL80211_IFTYPE_UNSPECIFIED:
1861 case NL80211_IFTYPE_WDS:
1862 case NUM_NL80211_IFTYPES:
1863 WARN_ON(1);
1864 break;
1865 }
1866
1867 /* need to do this after the switch so vif.type is correct */
1868 ieee80211_link_setup(&sdata->deflink);
1869
1870 ieee80211_debugfs_recreate_netdev(sdata, false);
1871 }
1872
ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1873 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1874 enum nl80211_iftype type)
1875 {
1876 struct ieee80211_local *local = sdata->local;
1877 int ret, err;
1878 enum nl80211_iftype internal_type = type;
1879 bool p2p = false;
1880
1881 ASSERT_RTNL();
1882
1883 if (!local->ops->change_interface)
1884 return -EBUSY;
1885
1886 /* for now, don't support changing while links exist */
1887 if (ieee80211_vif_is_mld(&sdata->vif))
1888 return -EBUSY;
1889
1890 switch (sdata->vif.type) {
1891 case NL80211_IFTYPE_AP:
1892 if (!list_empty(&sdata->u.ap.vlans))
1893 return -EBUSY;
1894 break;
1895 case NL80211_IFTYPE_STATION:
1896 case NL80211_IFTYPE_ADHOC:
1897 case NL80211_IFTYPE_OCB:
1898 /*
1899 * Could maybe also all others here?
1900 * Just not sure how that interacts
1901 * with the RX/config path e.g. for
1902 * mesh.
1903 */
1904 break;
1905 default:
1906 return -EBUSY;
1907 }
1908
1909 switch (type) {
1910 case NL80211_IFTYPE_AP:
1911 case NL80211_IFTYPE_STATION:
1912 case NL80211_IFTYPE_ADHOC:
1913 case NL80211_IFTYPE_OCB:
1914 /*
1915 * Could probably support everything
1916 * but here.
1917 */
1918 break;
1919 case NL80211_IFTYPE_P2P_CLIENT:
1920 p2p = true;
1921 internal_type = NL80211_IFTYPE_STATION;
1922 break;
1923 case NL80211_IFTYPE_P2P_GO:
1924 p2p = true;
1925 internal_type = NL80211_IFTYPE_AP;
1926 break;
1927 default:
1928 return -EBUSY;
1929 }
1930
1931 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1932 if (ret)
1933 return ret;
1934
1935 ieee80211_stop_vif_queues(local, sdata,
1936 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1937 /* do_stop will synchronize_rcu() first thing */
1938 ieee80211_do_stop(sdata, false);
1939
1940 ieee80211_teardown_sdata(sdata);
1941
1942 ieee80211_set_sdata_offload_flags(sdata);
1943 ret = drv_change_interface(local, sdata, internal_type, p2p);
1944 if (ret)
1945 type = ieee80211_vif_type_p2p(&sdata->vif);
1946
1947 /*
1948 * Ignore return value here, there's not much we can do since
1949 * the driver changed the interface type internally already.
1950 * The warnings will hopefully make driver authors fix it :-)
1951 */
1952 ieee80211_check_queues(sdata, type);
1953
1954 ieee80211_setup_sdata(sdata, type);
1955 ieee80211_set_vif_encap_ops(sdata);
1956
1957 err = ieee80211_do_open(&sdata->wdev, false);
1958 WARN(err, "type change: do_open returned %d", err);
1959
1960 ieee80211_wake_vif_queues(local, sdata,
1961 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1962 return ret;
1963 }
1964
ieee80211_if_change_type(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1965 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1966 enum nl80211_iftype type)
1967 {
1968 int ret;
1969
1970 ASSERT_RTNL();
1971
1972 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1973 return 0;
1974
1975 if (ieee80211_sdata_running(sdata)) {
1976 ret = ieee80211_runtime_change_iftype(sdata, type);
1977 if (ret)
1978 return ret;
1979 } else {
1980 /* Purge and reset type-dependent state. */
1981 ieee80211_teardown_sdata(sdata);
1982 ieee80211_setup_sdata(sdata, type);
1983 }
1984
1985 /* reset some values that shouldn't be kept across type changes */
1986 if (type == NL80211_IFTYPE_STATION)
1987 sdata->u.mgd.use_4addr = false;
1988
1989 return 0;
1990 }
1991
ieee80211_assign_perm_addr(struct ieee80211_local * local,u8 * perm_addr,enum nl80211_iftype type)1992 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1993 u8 *perm_addr, enum nl80211_iftype type)
1994 {
1995 struct ieee80211_sub_if_data *sdata;
1996 u64 mask, start, addr, val, inc;
1997 u8 *m;
1998 u8 tmp_addr[ETH_ALEN];
1999 int i;
2000
2001 lockdep_assert_wiphy(local->hw.wiphy);
2002
2003 /* default ... something at least */
2004 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
2005
2006 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
2007 local->hw.wiphy->n_addresses <= 1)
2008 return;
2009
2010 switch (type) {
2011 case NL80211_IFTYPE_MONITOR:
2012 /* doesn't matter */
2013 break;
2014 case NL80211_IFTYPE_AP_VLAN:
2015 /* match up with an AP interface */
2016 list_for_each_entry(sdata, &local->interfaces, list) {
2017 if (sdata->vif.type != NL80211_IFTYPE_AP)
2018 continue;
2019 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2020 break;
2021 }
2022 /* keep default if no AP interface present */
2023 break;
2024 case NL80211_IFTYPE_P2P_CLIENT:
2025 case NL80211_IFTYPE_P2P_GO:
2026 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
2027 list_for_each_entry(sdata, &local->interfaces, list) {
2028 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
2029 continue;
2030 if (!ieee80211_sdata_running(sdata))
2031 continue;
2032 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2033 return;
2034 }
2035 }
2036 fallthrough;
2037 default:
2038 /* assign a new address if possible -- try n_addresses first */
2039 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
2040 bool used = false;
2041
2042 list_for_each_entry(sdata, &local->interfaces, list) {
2043 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
2044 sdata->vif.addr)) {
2045 used = true;
2046 break;
2047 }
2048 }
2049
2050 if (!used) {
2051 memcpy(perm_addr,
2052 local->hw.wiphy->addresses[i].addr,
2053 ETH_ALEN);
2054 break;
2055 }
2056 }
2057
2058 /* try mask if available */
2059 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
2060 break;
2061
2062 m = local->hw.wiphy->addr_mask;
2063 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2064 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2065 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2066
2067 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
2068 /* not a contiguous mask ... not handled now! */
2069 pr_info("not contiguous\n");
2070 break;
2071 }
2072
2073 /*
2074 * Pick address of existing interface in case user changed
2075 * MAC address manually, default to perm_addr.
2076 */
2077 m = local->hw.wiphy->perm_addr;
2078 list_for_each_entry(sdata, &local->interfaces, list) {
2079 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2080 continue;
2081 m = sdata->vif.addr;
2082 break;
2083 }
2084 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2085 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2086 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2087
2088 inc = 1ULL<<__ffs64(mask);
2089 val = (start & mask);
2090 addr = (start & ~mask) | (val & mask);
2091 do {
2092 bool used = false;
2093
2094 tmp_addr[5] = addr >> 0*8;
2095 tmp_addr[4] = addr >> 1*8;
2096 tmp_addr[3] = addr >> 2*8;
2097 tmp_addr[2] = addr >> 3*8;
2098 tmp_addr[1] = addr >> 4*8;
2099 tmp_addr[0] = addr >> 5*8;
2100
2101 val += inc;
2102
2103 list_for_each_entry(sdata, &local->interfaces, list) {
2104 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2105 used = true;
2106 break;
2107 }
2108 }
2109
2110 if (!used) {
2111 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2112 break;
2113 }
2114 addr = (start & ~mask) | (val & mask);
2115 } while (addr != start);
2116
2117 break;
2118 }
2119 }
2120
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)2121 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2122 unsigned char name_assign_type,
2123 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2124 struct vif_params *params)
2125 {
2126 struct net_device *ndev = NULL;
2127 struct ieee80211_sub_if_data *sdata = NULL;
2128 struct txq_info *txqi;
2129 int ret, i;
2130
2131 ASSERT_RTNL();
2132 lockdep_assert_wiphy(local->hw.wiphy);
2133
2134 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2135 struct wireless_dev *wdev;
2136
2137 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2138 GFP_KERNEL);
2139 if (!sdata)
2140 return -ENOMEM;
2141 wdev = &sdata->wdev;
2142
2143 sdata->dev = NULL;
2144 strscpy(sdata->name, name, IFNAMSIZ);
2145 ieee80211_assign_perm_addr(local, wdev->address, type);
2146 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2147 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2148 } else {
2149 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2150 sizeof(void *));
2151 int txq_size = 0;
2152
2153 if (type != NL80211_IFTYPE_AP_VLAN &&
2154 (type != NL80211_IFTYPE_MONITOR ||
2155 (params->flags & MONITOR_FLAG_ACTIVE)))
2156 txq_size += sizeof(struct txq_info) +
2157 local->hw.txq_data_size;
2158
2159 ndev = alloc_netdev_mqs(size + txq_size,
2160 name, name_assign_type,
2161 ieee80211_if_setup, 1, 1);
2162 if (!ndev)
2163 return -ENOMEM;
2164
2165 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2166
2167 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2168
2169 ndev->needed_headroom = local->tx_headroom +
2170 4*6 /* four MAC addresses */
2171 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2172 + 6 /* mesh */
2173 + 8 /* rfc1042/bridge tunnel */
2174 - ETH_HLEN /* ethernet hard_header_len */
2175 + IEEE80211_ENCRYPT_HEADROOM;
2176 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2177
2178 ret = dev_alloc_name(ndev, ndev->name);
2179 if (ret < 0) {
2180 free_netdev(ndev);
2181 return ret;
2182 }
2183
2184 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2185 if (is_valid_ether_addr(params->macaddr))
2186 eth_hw_addr_set(ndev, params->macaddr);
2187 else
2188 eth_hw_addr_set(ndev, ndev->perm_addr);
2189 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2190
2191 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2192 sdata = netdev_priv(ndev);
2193 ndev->ieee80211_ptr = &sdata->wdev;
2194 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2195 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2196 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2197
2198 if (txq_size) {
2199 txqi = netdev_priv(ndev) + size;
2200 ieee80211_txq_init(sdata, NULL, txqi, 0);
2201 }
2202
2203 sdata->dev = ndev;
2204 }
2205
2206 /* initialise type-independent data */
2207 sdata->wdev.wiphy = local->hw.wiphy;
2208
2209 ieee80211_sdata_init(local, sdata);
2210
2211 ieee80211_init_frag_cache(&sdata->frags);
2212
2213 INIT_LIST_HEAD(&sdata->key_list);
2214
2215 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
2216 ieee80211_delayed_tailroom_dec);
2217
2218 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2219 struct ieee80211_supported_band *sband;
2220 sband = local->hw.wiphy->bands[i];
2221 sdata->rc_rateidx_mask[i] =
2222 sband ? (1 << sband->n_bitrates) - 1 : 0;
2223 if (sband) {
2224 __le16 cap;
2225 u16 *vht_rate_mask;
2226
2227 memcpy(sdata->rc_rateidx_mcs_mask[i],
2228 sband->ht_cap.mcs.rx_mask,
2229 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2230
2231 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2232 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2233 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2234 } else {
2235 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2236 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2237 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2238 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2239 }
2240 }
2241
2242 ieee80211_set_default_queues(sdata);
2243
2244 /* setup type-dependent data */
2245 ieee80211_setup_sdata(sdata, type);
2246
2247 if (ndev) {
2248 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2249 if (type == NL80211_IFTYPE_STATION)
2250 sdata->u.mgd.use_4addr = params->use_4addr;
2251
2252 ndev->features |= local->hw.netdev_features;
2253 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2254 ndev->hw_features |= ndev->features &
2255 MAC80211_SUPPORTED_FEATURES_TX;
2256 sdata->vif.netdev_features = local->hw.netdev_features;
2257
2258 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2259
2260 /* MTU range is normally 256 - 2304, where the upper limit is
2261 * the maximum MSDU size. Monitor interfaces send and receive
2262 * MPDU and A-MSDU frames which may be much larger so we do
2263 * not impose an upper limit in that case.
2264 */
2265 ndev->min_mtu = 256;
2266 if (type == NL80211_IFTYPE_MONITOR)
2267 ndev->max_mtu = 0;
2268 else
2269 ndev->max_mtu = local->hw.max_mtu;
2270
2271 ret = cfg80211_register_netdevice(ndev);
2272 if (ret) {
2273 free_netdev(ndev);
2274 return ret;
2275 }
2276 }
2277
2278 mutex_lock(&local->iflist_mtx);
2279 list_add_tail_rcu(&sdata->list, &local->interfaces);
2280 mutex_unlock(&local->iflist_mtx);
2281
2282 if (new_wdev)
2283 *new_wdev = &sdata->wdev;
2284
2285 return 0;
2286 }
2287
ieee80211_if_remove(struct ieee80211_sub_if_data * sdata)2288 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2289 {
2290 ASSERT_RTNL();
2291 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2292
2293 mutex_lock(&sdata->local->iflist_mtx);
2294 list_del_rcu(&sdata->list);
2295 mutex_unlock(&sdata->local->iflist_mtx);
2296
2297 if (sdata->vif.txq)
2298 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2299
2300 synchronize_rcu();
2301
2302 cfg80211_unregister_wdev(&sdata->wdev);
2303
2304 if (!sdata->dev) {
2305 ieee80211_teardown_sdata(sdata);
2306 kfree(sdata);
2307 }
2308 }
2309
ieee80211_sdata_stop(struct ieee80211_sub_if_data * sdata)2310 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2311 {
2312 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2313 return;
2314 ieee80211_do_stop(sdata, true);
2315 }
2316
ieee80211_remove_interfaces(struct ieee80211_local * local)2317 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2318 {
2319 struct ieee80211_sub_if_data *sdata, *tmp;
2320 LIST_HEAD(unreg_list);
2321
2322 ASSERT_RTNL();
2323
2324 /* Before destroying the interfaces, make sure they're all stopped so
2325 * that the hardware is stopped. Otherwise, the driver might still be
2326 * iterating the interfaces during the shutdown, e.g. from a worker
2327 * or from RX processing or similar, and if it does so (using atomic
2328 * iteration) while we're manipulating the list, the iteration will
2329 * crash.
2330 *
2331 * After this, the hardware should be stopped and the driver should
2332 * have stopped all of its activities, so that we can do RCU-unaware
2333 * manipulations of the interface list below.
2334 */
2335 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2336
2337 guard(wiphy)(local->hw.wiphy);
2338
2339 WARN(local->open_count, "%s: open count remains %d\n",
2340 wiphy_name(local->hw.wiphy), local->open_count);
2341
2342 mutex_lock(&local->iflist_mtx);
2343 list_splice_init(&local->interfaces, &unreg_list);
2344 mutex_unlock(&local->iflist_mtx);
2345
2346 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2347 bool netdev = sdata->dev;
2348
2349 /*
2350 * Remove IP addresses explicitly, since the notifier will
2351 * skip the callbacks if wdev->registered is false, since
2352 * we can't acquire the wiphy_lock() again there if already
2353 * inside this locked section.
2354 */
2355 sdata->vif.cfg.arp_addr_cnt = 0;
2356 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2357 sdata->u.mgd.associated)
2358 ieee80211_vif_cfg_change_notify(sdata,
2359 BSS_CHANGED_ARP_FILTER);
2360
2361 list_del(&sdata->list);
2362 cfg80211_unregister_wdev(&sdata->wdev);
2363
2364 if (!netdev)
2365 kfree(sdata);
2366 }
2367 }
2368
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)2369 static int netdev_notify(struct notifier_block *nb,
2370 unsigned long state, void *ptr)
2371 {
2372 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2373 struct ieee80211_sub_if_data *sdata;
2374
2375 if (state != NETDEV_CHANGENAME)
2376 return NOTIFY_DONE;
2377
2378 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2379 return NOTIFY_DONE;
2380
2381 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2382 return NOTIFY_DONE;
2383
2384 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2385 memcpy(sdata->name, dev->name, IFNAMSIZ);
2386 ieee80211_debugfs_rename_netdev(sdata);
2387
2388 return NOTIFY_OK;
2389 }
2390
2391 static struct notifier_block mac80211_netdev_notifier = {
2392 .notifier_call = netdev_notify,
2393 };
2394
ieee80211_iface_init(void)2395 int ieee80211_iface_init(void)
2396 {
2397 return register_netdevice_notifier(&mac80211_netdev_notifier);
2398 }
2399
ieee80211_iface_exit(void)2400 void ieee80211_iface_exit(void)
2401 {
2402 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2403 }
2404
ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data * sdata)2405 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2406 {
2407 if (sdata->vif.type == NL80211_IFTYPE_AP)
2408 atomic_inc(&sdata->u.ap.num_mcast_sta);
2409 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2410 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2411 }
2412
ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data * sdata)2413 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2414 {
2415 if (sdata->vif.type == NL80211_IFTYPE_AP)
2416 atomic_dec(&sdata->u.ap.num_mcast_sta);
2417 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2418 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2419 }
2420
ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data * sdata)2421 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
2422 {
2423 struct ieee80211_local *local = sdata->local;
2424
2425 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
2426 return;
2427
2428 ieee80211_stop_vif_queues_norefcount(local, sdata,
2429 IEEE80211_QUEUE_STOP_REASON_CSA);
2430 }
2431
ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data * sdata)2432 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
2433 {
2434 struct ieee80211_local *local = sdata->local;
2435
2436 ieee80211_wake_vif_queues_norefcount(local, sdata,
2437 IEEE80211_QUEUE_STOP_REASON_CSA);
2438 }
2439