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 struct ieee80211_sub_if_data *iter;
111
112 lockdep_assert_wiphy(local->hw.wiphy);
113
114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
116 local->monitors;
117
118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
120
121 list_for_each_entry(iter, &local->interfaces, list) {
122 if (iter->vif.type == NL80211_IFTYPE_NAN &&
123 iter->u.nan.started) {
124 working = true;
125 break;
126 }
127 }
128
129 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
130 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
131
132 if (working || scanning)
133 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
134 else
135 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
136
137 if (active)
138 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
139 else
140 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
141
142 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
143
144 if (working || scanning || active)
145 return __ieee80211_idle_off(local);
146 return __ieee80211_idle_on(local);
147 }
148
ieee80211_idle_off(struct ieee80211_local * local)149 u32 ieee80211_idle_off(struct ieee80211_local *local)
150 {
151 return __ieee80211_recalc_idle(local, true);
152 }
153
ieee80211_recalc_idle(struct ieee80211_local * local)154 void ieee80211_recalc_idle(struct ieee80211_local *local)
155 {
156 u32 change = __ieee80211_recalc_idle(local, false);
157 if (change)
158 ieee80211_hw_config(local, -1, change);
159 }
160
ieee80211_verify_mac(struct ieee80211_sub_if_data * sdata,u8 * addr,bool check_dup)161 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
162 bool check_dup)
163 {
164 struct ieee80211_local *local = sdata->local;
165 struct ieee80211_sub_if_data *iter;
166 u64 new, mask, tmp;
167 u8 *m;
168 int ret = 0;
169
170 lockdep_assert_wiphy(local->hw.wiphy);
171
172 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
173 return 0;
174
175 m = addr;
176 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179
180 m = local->hw.wiphy->addr_mask;
181 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
182 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
183 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
184
185 if (!check_dup)
186 return ret;
187
188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
190 continue;
191
192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
193 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
194 continue;
195
196 m = iter->vif.addr;
197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206
207 return ret;
208 }
209
ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data * sdata)210 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
211 {
212 struct ieee80211_roc_work *roc;
213 struct ieee80211_local *local = sdata->local;
214 struct ieee80211_sub_if_data *scan_sdata;
215 int ret = 0;
216
217 lockdep_assert_wiphy(local->hw.wiphy);
218
219 /* To be the most flexible here we want to only limit changing the
220 * address if the specific interface is doing offchannel work or
221 * scanning.
222 */
223 if (netif_carrier_ok(sdata->dev))
224 return -EBUSY;
225
226 /* if any stations are set known (so they know this vif too), reject */
227 if (sta_info_get_by_idx(sdata, 0))
228 return -EBUSY;
229
230 /* First check no ROC work is happening on this iface */
231 list_for_each_entry(roc, &local->roc_list, list) {
232 if (roc->sdata != sdata)
233 continue;
234
235 if (roc->started) {
236 ret = -EBUSY;
237 goto unlock;
238 }
239 }
240
241 /* And if this iface is scanning */
242 if (local->scanning) {
243 scan_sdata = rcu_dereference_protected(local->scan_sdata,
244 lockdep_is_held(&local->hw.wiphy->mtx));
245 if (sdata == scan_sdata)
246 ret = -EBUSY;
247 }
248
249 /*
250 * More interface types could be added here but changing the
251 * address while powered makes the most sense in client modes.
252 */
253 switch (sdata->vif.type) {
254 case NL80211_IFTYPE_STATION:
255 case NL80211_IFTYPE_P2P_CLIENT:
256 /* refuse while connecting */
257 if (sdata->u.mgd.auth_data || sdata->u.mgd.assoc_data)
258 return -EBUSY;
259 break;
260 default:
261 ret = -EOPNOTSUPP;
262 }
263
264 unlock:
265 return ret;
266 }
267
_ieee80211_change_mac(struct ieee80211_sub_if_data * sdata,void * addr)268 static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata,
269 void *addr)
270 {
271 struct ieee80211_local *local = sdata->local;
272 struct sockaddr *sa = addr;
273 bool check_dup = true;
274 bool live = false;
275 int ret;
276
277 if (ieee80211_sdata_running(sdata)) {
278 ret = ieee80211_can_powered_addr_change(sdata);
279 if (ret)
280 return ret;
281
282 live = true;
283 }
284
285 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
286 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
287 check_dup = false;
288
289 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
290 if (ret)
291 return ret;
292
293 if (live)
294 drv_remove_interface(local, sdata);
295 ret = eth_mac_addr(sdata->dev, sa);
296
297 if (ret == 0) {
298 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
299 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
300 }
301
302 /* Regardless of eth_mac_addr() return we still want to add the
303 * interface back. This should not fail...
304 */
305 if (live)
306 WARN_ON(drv_add_interface(local, sdata));
307
308 return ret;
309 }
310
ieee80211_change_mac(struct net_device * dev,void * addr)311 static int ieee80211_change_mac(struct net_device *dev, void *addr)
312 {
313 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
314 struct ieee80211_local *local = sdata->local;
315
316 /*
317 * This happens during unregistration if there's a bond device
318 * active (maybe other cases?) and we must get removed from it.
319 * But we really don't care anymore if it's not registered now.
320 */
321 if (!dev->ieee80211_ptr->registered)
322 return 0;
323
324 guard(wiphy)(local->hw.wiphy);
325
326 return _ieee80211_change_mac(sdata, addr);
327 }
328
identical_mac_addr_allowed(int type1,int type2)329 static inline int identical_mac_addr_allowed(int type1, int type2)
330 {
331 return type1 == NL80211_IFTYPE_MONITOR ||
332 type2 == NL80211_IFTYPE_MONITOR ||
333 type1 == NL80211_IFTYPE_P2P_DEVICE ||
334 type2 == NL80211_IFTYPE_P2P_DEVICE ||
335 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
336 (type1 == NL80211_IFTYPE_AP_VLAN &&
337 (type2 == NL80211_IFTYPE_AP ||
338 type2 == NL80211_IFTYPE_AP_VLAN));
339 }
340
ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)341 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
342 enum nl80211_iftype iftype)
343 {
344 struct ieee80211_local *local = sdata->local;
345 struct ieee80211_sub_if_data *nsdata;
346
347 ASSERT_RTNL();
348 lockdep_assert_wiphy(local->hw.wiphy);
349
350 /* we hold the RTNL here so can safely walk the list */
351 list_for_each_entry(nsdata, &local->interfaces, list) {
352 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
353 /*
354 * Only OCB and monitor mode may coexist
355 */
356 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
357 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
358 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
359 nsdata->vif.type == NL80211_IFTYPE_OCB))
360 return -EBUSY;
361
362 /*
363 * Allow only a single IBSS interface to be up at any
364 * time. This is restricted because beacon distribution
365 * cannot work properly if both are in the same IBSS.
366 *
367 * To remove this restriction we'd have to disallow them
368 * from setting the same SSID on different IBSS interfaces
369 * belonging to the same hardware. Then, however, we're
370 * faced with having to adopt two different TSF timers...
371 */
372 if (iftype == NL80211_IFTYPE_ADHOC &&
373 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
374 return -EBUSY;
375 /*
376 * will not add another interface while any channel
377 * switch is active.
378 */
379 if (nsdata->vif.bss_conf.csa_active)
380 return -EBUSY;
381
382 /*
383 * The remaining checks are only performed for interfaces
384 * with the same MAC address.
385 */
386 if (!ether_addr_equal(sdata->vif.addr,
387 nsdata->vif.addr))
388 continue;
389
390 /*
391 * check whether it may have the same address
392 */
393 if (!identical_mac_addr_allowed(iftype,
394 nsdata->vif.type))
395 return -ENOTUNIQ;
396
397 /* No support for VLAN with MLO yet */
398 if (iftype == NL80211_IFTYPE_AP_VLAN &&
399 sdata->wdev.use_4addr &&
400 nsdata->vif.type == NL80211_IFTYPE_AP &&
401 nsdata->vif.valid_links)
402 return -EOPNOTSUPP;
403
404 /*
405 * can only add VLANs to enabled APs
406 */
407 if (iftype == NL80211_IFTYPE_AP_VLAN &&
408 nsdata->vif.type == NL80211_IFTYPE_AP)
409 sdata->bss = &nsdata->u.ap;
410 }
411 }
412
413 return ieee80211_check_combinations(sdata, NULL, 0, 0, -1);
414 }
415
ieee80211_check_queues(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype iftype)416 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
417 enum nl80211_iftype iftype)
418 {
419 int n_queues = sdata->local->hw.queues;
420 int i;
421
422 if (iftype == NL80211_IFTYPE_NAN)
423 return 0;
424
425 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
426 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
427 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
428 IEEE80211_INVAL_HW_QUEUE))
429 return -EINVAL;
430 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
431 n_queues))
432 return -EINVAL;
433 }
434 }
435
436 if ((iftype != NL80211_IFTYPE_AP &&
437 iftype != NL80211_IFTYPE_P2P_GO &&
438 iftype != NL80211_IFTYPE_MESH_POINT) ||
439 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
440 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
441 return 0;
442 }
443
444 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
445 return -EINVAL;
446
447 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
448 return -EINVAL;
449
450 return 0;
451 }
452
ieee80211_open(struct net_device * dev)453 static int ieee80211_open(struct net_device *dev)
454 {
455 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
456 int err;
457
458 /* fail early if user set an invalid address */
459 if (!is_valid_ether_addr(dev->dev_addr))
460 return -EADDRNOTAVAIL;
461
462 guard(wiphy)(sdata->local->hw.wiphy);
463
464 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
465 if (err)
466 return err;
467
468 return ieee80211_do_open(&sdata->wdev, true);
469 }
470
ieee80211_do_stop(struct ieee80211_sub_if_data * sdata,bool going_down)471 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
472 {
473 struct ieee80211_local *local = sdata->local;
474 unsigned long flags;
475 struct sk_buff_head freeq;
476 struct sk_buff *skb, *tmp;
477 u32 hw_reconf_flags = 0;
478 int i, flushed;
479 struct ps_data *ps;
480 struct cfg80211_chan_def chandef;
481 bool cancel_scan;
482 struct cfg80211_nan_func *func;
483
484 lockdep_assert_wiphy(local->hw.wiphy);
485
486 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
487 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
488
489 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
490 if (cancel_scan)
491 ieee80211_scan_cancel(local);
492
493 ieee80211_roc_purge(local, sdata);
494
495 switch (sdata->vif.type) {
496 case NL80211_IFTYPE_STATION:
497 ieee80211_mgd_stop(sdata);
498 break;
499 case NL80211_IFTYPE_ADHOC:
500 ieee80211_ibss_stop(sdata);
501 break;
502 case NL80211_IFTYPE_MONITOR:
503 list_del_rcu(&sdata->u.mntr.list);
504 break;
505 case NL80211_IFTYPE_AP_VLAN:
506 ieee80211_apvlan_link_clear(sdata);
507 break;
508 default:
509 break;
510 }
511
512 /*
513 * Remove all stations associated with this interface.
514 *
515 * This must be done before calling ops->remove_interface()
516 * because otherwise we can later invoke ops->sta_notify()
517 * whenever the STAs are removed, and that invalidates driver
518 * assumptions about always getting a vif pointer that is valid
519 * (because if we remove a STA after ops->remove_interface()
520 * the driver will have removed the vif info already!)
521 *
522 * For AP_VLANs stations may exist since there's nothing else that
523 * would have removed them, but in other modes there shouldn't
524 * be any stations.
525 */
526 flushed = sta_info_flush(sdata, -1);
527 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
528
529 /* don't count this interface for allmulti while it is down */
530 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
531 atomic_dec(&local->iff_allmultis);
532
533 if (sdata->vif.type == NL80211_IFTYPE_AP) {
534 local->fif_pspoll--;
535 local->fif_probe_req--;
536 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
537 local->fif_probe_req--;
538 }
539
540 if (sdata->dev) {
541 netif_addr_lock_bh(sdata->dev);
542 spin_lock_bh(&local->filter_lock);
543 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
544 sdata->dev->addr_len);
545 spin_unlock_bh(&local->filter_lock);
546 netif_addr_unlock_bh(sdata->dev);
547 }
548
549 timer_delete_sync(&local->dynamic_ps_timer);
550 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
551
552 WARN(ieee80211_vif_is_mld(&sdata->vif),
553 "destroying interface with valid links 0x%04x\n",
554 sdata->vif.valid_links);
555
556 sdata->vif.bss_conf.csa_active = false;
557 if (sdata->vif.type == NL80211_IFTYPE_STATION)
558 sdata->deflink.u.mgd.csa.waiting_bcn = false;
559 ieee80211_vif_unblock_queues_csa(sdata);
560
561 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa.finalize_work);
562 wiphy_work_cancel(local->hw.wiphy,
563 &sdata->deflink.color_change_finalize_work);
564 wiphy_delayed_work_cancel(local->hw.wiphy,
565 &sdata->deflink.dfs_cac_timer_work);
566
567 if (sdata->wdev.links[0].cac_started) {
568 chandef = sdata->vif.bss_conf.chanreq.oper;
569 WARN_ON(local->suspended);
570 ieee80211_link_release_channel(&sdata->deflink);
571 cfg80211_cac_event(sdata->dev, &chandef,
572 NL80211_RADAR_CAC_ABORTED,
573 GFP_KERNEL, 0);
574 }
575
576 if (sdata->vif.type == NL80211_IFTYPE_AP) {
577 WARN_ON(!list_empty(&sdata->u.ap.vlans));
578 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
579 /* remove all packets in parent bc_buf pointing to this dev */
580 ps = &sdata->bss->ps;
581
582 spin_lock_irqsave(&ps->bc_buf.lock, flags);
583 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
584 if (skb->dev == sdata->dev) {
585 __skb_unlink(skb, &ps->bc_buf);
586 local->total_ps_buffered--;
587 ieee80211_free_txskb(&local->hw, skb);
588 }
589 }
590 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
591 }
592
593 if (going_down)
594 local->open_count--;
595
596 switch (sdata->vif.type) {
597 case NL80211_IFTYPE_AP_VLAN:
598 list_del(&sdata->u.vlan.list);
599 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
600 /* see comment in the default case below */
601 ieee80211_free_keys(sdata, true);
602 /* no need to tell driver */
603 break;
604 case NL80211_IFTYPE_MONITOR:
605 local->monitors--;
606
607 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
608 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
609
610 local->virt_monitors--;
611 if (local->virt_monitors == 0) {
612 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
613 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
614 }
615
616 ieee80211_adjust_monitor_flags(sdata, -1);
617 }
618 break;
619 case NL80211_IFTYPE_NAN:
620 /* clean all the functions */
621 spin_lock_bh(&sdata->u.nan.func_lock);
622
623 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
624 idr_remove(&sdata->u.nan.function_inst_ids, i);
625 cfg80211_free_nan_func(func);
626 }
627 idr_destroy(&sdata->u.nan.function_inst_ids);
628
629 spin_unlock_bh(&sdata->u.nan.func_lock);
630 break;
631 default:
632 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
633 /*
634 * When we get here, the interface is marked down.
635 * Free the remaining keys, if there are any
636 * (which can happen in AP mode if userspace sets
637 * keys before the interface is operating)
638 *
639 * Force the key freeing to always synchronize_net()
640 * to wait for the RX path in case it is using this
641 * interface enqueuing frames at this very time on
642 * another CPU.
643 */
644 ieee80211_free_keys(sdata, true);
645 skb_queue_purge(&sdata->skb_queue);
646 skb_queue_purge(&sdata->status_queue);
647 }
648
649 /*
650 * Since ieee80211_free_txskb() may issue __dev_queue_xmit()
651 * which should be called with interrupts enabled, reclamation
652 * is done in two phases:
653 */
654 __skb_queue_head_init(&freeq);
655
656 /* unlink from local queues... */
657 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
658 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
659 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
660 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
661 if (info->control.vif == &sdata->vif) {
662 __skb_unlink(skb, &local->pending[i]);
663 __skb_queue_tail(&freeq, skb);
664 }
665 }
666 }
667 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
668
669 /* ... and perform actual reclamation with interrupts enabled. */
670 skb_queue_walk_safe(&freeq, skb, tmp) {
671 __skb_unlink(skb, &freeq);
672 ieee80211_free_txskb(&local->hw, skb);
673 }
674
675 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
676 ieee80211_txq_remove_vlan(local, sdata);
677
678 if (sdata->vif.txq)
679 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
680
681 sdata->bss = NULL;
682
683 if (local->open_count == 0)
684 ieee80211_clear_tx_pending(local);
685
686 sdata->vif.bss_conf.beacon_int = 0;
687
688 /*
689 * If the interface goes down while suspended, presumably because
690 * the device was unplugged and that happens before our resume,
691 * then the driver is already unconfigured and the remainder of
692 * this function isn't needed.
693 * XXX: what about WoWLAN? If the device has software state, e.g.
694 * memory allocated, it might expect teardown commands from
695 * mac80211 here?
696 */
697 if (local->suspended) {
698 WARN_ON(local->wowlan);
699 WARN_ON(rcu_access_pointer(local->monitor_sdata));
700 return;
701 }
702
703 switch (sdata->vif.type) {
704 case NL80211_IFTYPE_AP_VLAN:
705 break;
706 case NL80211_IFTYPE_MONITOR:
707 if (local->virt_monitors == 0)
708 ieee80211_del_virtual_monitor(local);
709
710 ieee80211_recalc_idle(local);
711 ieee80211_recalc_offload(local);
712
713 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
714 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
715 break;
716
717 ieee80211_link_release_channel(&sdata->deflink);
718 fallthrough;
719 default:
720 if (!going_down)
721 break;
722 drv_remove_interface(local, sdata);
723
724 /* Clear private driver data to prevent reuse */
725 memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size);
726 }
727
728 ieee80211_recalc_ps(local);
729
730 if (cancel_scan)
731 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
732
733 if (local->open_count == 0) {
734 ieee80211_stop_device(local, false);
735
736 /* no reconfiguring after stop! */
737 return;
738 }
739
740 /* do after stop to avoid reconfiguring when we stop anyway */
741 ieee80211_configure_filter(local);
742 ieee80211_hw_config(local, -1, hw_reconf_flags);
743
744 /* Passing NULL means an interface is picked for configuration */
745 if (local->virt_monitors == local->open_count)
746 ieee80211_add_virtual_monitor(local, NULL);
747 }
748
ieee80211_stop_mbssid(struct ieee80211_sub_if_data * sdata)749 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
750 {
751 struct ieee80211_sub_if_data *tx_sdata;
752 struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
753 struct ieee80211_link_data *tx_link, *link;
754 unsigned int link_id;
755
756 lockdep_assert_wiphy(sdata->local->hw.wiphy);
757
758 /* Check if any of the links of current sdata is an MBSSID. */
759 for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
760 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata);
761 if (!tx_bss_conf)
762 continue;
763
764 tx_sdata = vif_to_sdata(tx_bss_conf->vif);
765 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
766
767 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion
768 * while closing tx sdata at the end of outer loop below.
769 */
770 if (sdata != tx_sdata) {
771 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id],
772 tx_sdata);
773 if (!tx_link)
774 continue;
775
776 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL);
777 }
778
779 /* loop through sdatas to find if any of their links
780 * belong to same MBSSID set as the one getting deleted.
781 */
782 for_each_sdata_link(tx_sdata->local, link) {
783 struct ieee80211_sub_if_data *link_sdata = link->sdata;
784
785 if (link_sdata == sdata || link_sdata == tx_sdata ||
786 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf)
787 continue;
788
789 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL);
790
791 /* Remove all links of matching MLD until dynamic link
792 * removal can be supported.
793 */
794 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev,
795 GFP_KERNEL);
796 }
797
798 /* If we are not tx sdata, remove links of tx sdata and proceed */
799 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata))
800 cfg80211_stop_iface(tx_sdata->wdev.wiphy,
801 &tx_sdata->wdev, GFP_KERNEL);
802 }
803 }
804
ieee80211_stop(struct net_device * dev)805 static int ieee80211_stop(struct net_device *dev)
806 {
807 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
808
809 /* close dependent VLAN interfaces before locking wiphy */
810 if (sdata->vif.type == NL80211_IFTYPE_AP) {
811 struct ieee80211_sub_if_data *vlan, *tmpsdata;
812
813 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
814 u.vlan.list)
815 dev_close(vlan->dev);
816 }
817
818 guard(wiphy)(sdata->local->hw.wiphy);
819
820 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
821
822 /* Close the dependent MBSSID interfaces with wiphy lock as we may be
823 * terminating its partner links too in case of MLD.
824 */
825 if (sdata->vif.type == NL80211_IFTYPE_AP)
826 ieee80211_stop_mbssid(sdata);
827
828 ieee80211_do_stop(sdata, true);
829
830 return 0;
831 }
832
ieee80211_set_multicast_list(struct net_device * dev)833 static void ieee80211_set_multicast_list(struct net_device *dev)
834 {
835 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
836 struct ieee80211_local *local = sdata->local;
837 int allmulti, sdata_allmulti;
838
839 allmulti = !!(dev->flags & IFF_ALLMULTI);
840 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
841
842 if (allmulti != sdata_allmulti) {
843 if (dev->flags & IFF_ALLMULTI)
844 atomic_inc(&local->iff_allmultis);
845 else
846 atomic_dec(&local->iff_allmultis);
847 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
848 }
849
850 spin_lock_bh(&local->filter_lock);
851 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
852 spin_unlock_bh(&local->filter_lock);
853 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter);
854 }
855
856 /*
857 * Called when the netdev is removed or, by the code below, before
858 * the interface type changes.
859 */
ieee80211_teardown_sdata(struct ieee80211_sub_if_data * sdata)860 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
861 {
862 if (WARN_ON(!list_empty(&sdata->work.entry)))
863 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
864
865 /* free extra data */
866 ieee80211_free_keys(sdata, false);
867
868 ieee80211_debugfs_remove_netdev(sdata);
869
870 ieee80211_destroy_frag_cache(&sdata->frags);
871
872 if (ieee80211_vif_is_mesh(&sdata->vif))
873 ieee80211_mesh_teardown_sdata(sdata);
874
875 ieee80211_vif_clear_links(sdata);
876 ieee80211_link_stop(&sdata->deflink);
877 }
878
ieee80211_uninit(struct net_device * dev)879 static void ieee80211_uninit(struct net_device *dev)
880 {
881 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
882 }
883
ieee80211_netdev_setup_tc(struct net_device * dev,enum tc_setup_type type,void * type_data)884 static int ieee80211_netdev_setup_tc(struct net_device *dev,
885 enum tc_setup_type type, void *type_data)
886 {
887 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
888 struct ieee80211_local *local = sdata->local;
889
890 return drv_net_setup_tc(local, sdata, dev, type, type_data);
891 }
892
893 static const struct net_device_ops ieee80211_dataif_ops = {
894 .ndo_open = ieee80211_open,
895 .ndo_stop = ieee80211_stop,
896 .ndo_uninit = ieee80211_uninit,
897 .ndo_start_xmit = ieee80211_subif_start_xmit,
898 .ndo_set_rx_mode = ieee80211_set_multicast_list,
899 .ndo_set_mac_address = ieee80211_change_mac,
900 .ndo_setup_tc = ieee80211_netdev_setup_tc,
901 };
902
ieee80211_monitor_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)903 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
904 struct sk_buff *skb,
905 struct net_device *sb_dev)
906 {
907 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
908 struct ieee80211_local *local = sdata->local;
909 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
910 struct ieee80211_hdr *hdr;
911 int len_rthdr;
912
913 if (local->hw.queues < IEEE80211_NUM_ACS)
914 return 0;
915
916 /* reset flags and info before parsing radiotap header */
917 memset(info, 0, sizeof(*info));
918
919 if (!ieee80211_parse_tx_radiotap(skb, dev))
920 return 0; /* doesn't matter, frame will be dropped */
921
922 len_rthdr = ieee80211_get_radiotap_len(skb->data);
923 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
924 if (skb->len < len_rthdr + 2 ||
925 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
926 return 0; /* doesn't matter, frame will be dropped */
927
928 return ieee80211_select_queue_80211(sdata, skb, hdr);
929 }
930
931 static const struct net_device_ops ieee80211_monitorif_ops = {
932 .ndo_open = ieee80211_open,
933 .ndo_stop = ieee80211_stop,
934 .ndo_uninit = ieee80211_uninit,
935 .ndo_start_xmit = ieee80211_monitor_start_xmit,
936 .ndo_set_rx_mode = ieee80211_set_multicast_list,
937 .ndo_set_mac_address = ieee80211_change_mac,
938 .ndo_select_queue = ieee80211_monitor_select_queue,
939 };
940
ieee80211_netdev_fill_forward_path(struct net_device_path_ctx * ctx,struct net_device_path * path)941 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
942 struct net_device_path *path)
943 {
944 struct ieee80211_sub_if_data *sdata;
945 struct ieee80211_local *local;
946 struct sta_info *sta;
947 int ret = -ENOENT;
948
949 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
950 local = sdata->local;
951
952 if (!local->ops->net_fill_forward_path)
953 return -EOPNOTSUPP;
954
955 rcu_read_lock();
956 switch (sdata->vif.type) {
957 case NL80211_IFTYPE_AP_VLAN:
958 sta = rcu_dereference(sdata->u.vlan.sta);
959 if (sta)
960 break;
961 if (sdata->wdev.use_4addr)
962 goto out;
963 if (is_multicast_ether_addr(ctx->daddr))
964 goto out;
965 sta = sta_info_get_bss(sdata, ctx->daddr);
966 break;
967 case NL80211_IFTYPE_AP:
968 if (is_multicast_ether_addr(ctx->daddr))
969 goto out;
970 sta = sta_info_get(sdata, ctx->daddr);
971 break;
972 case NL80211_IFTYPE_STATION:
973 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
974 sta = sta_info_get(sdata, ctx->daddr);
975 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
976 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
977 goto out;
978
979 break;
980 }
981 }
982
983 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
984 break;
985 default:
986 goto out;
987 }
988
989 if (!sta)
990 goto out;
991
992 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
993 out:
994 rcu_read_unlock();
995
996 return ret;
997 }
998
999 static const struct net_device_ops ieee80211_dataif_8023_ops = {
1000 .ndo_open = ieee80211_open,
1001 .ndo_stop = ieee80211_stop,
1002 .ndo_uninit = ieee80211_uninit,
1003 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1004 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1005 .ndo_set_mac_address = ieee80211_change_mac,
1006 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
1007 .ndo_setup_tc = ieee80211_netdev_setup_tc,
1008 };
1009
ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)1010 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
1011 {
1012 switch (iftype) {
1013 /* P2P GO and client are mapped to AP/STATION types */
1014 case NL80211_IFTYPE_AP:
1015 case NL80211_IFTYPE_STATION:
1016 return true;
1017 default:
1018 return false;
1019 }
1020 }
1021
ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data * sdata)1022 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
1023 {
1024 struct ieee80211_local *local = sdata->local;
1025 u32 flags;
1026
1027 flags = sdata->vif.offload_flags;
1028
1029 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
1030 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1031 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
1032
1033 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1034 local->hw.wiphy->frag_threshold != (u32)-1)
1035 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1036
1037 if (local->virt_monitors)
1038 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1039 } else {
1040 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1041 }
1042
1043 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
1044 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1045 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
1046
1047 if (local->virt_monitors &&
1048 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
1049 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1050 } else {
1051 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1052 }
1053
1054 if (sdata->vif.offload_flags == flags)
1055 return false;
1056
1057 sdata->vif.offload_flags = flags;
1058 ieee80211_check_fast_rx_iface(sdata);
1059 return true;
1060 }
1061
ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data * sdata)1062 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1063 {
1064 struct ieee80211_local *local = sdata->local;
1065 struct ieee80211_sub_if_data *bss = sdata;
1066 bool enabled;
1067
1068 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1069 if (!sdata->bss)
1070 return;
1071
1072 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1073 }
1074
1075 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1076 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1077 return;
1078
1079 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1080 if (sdata->wdev.use_4addr &&
1081 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1082 enabled = false;
1083
1084 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1085 &ieee80211_dataif_ops;
1086 }
1087
ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data * sdata)1088 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1089 {
1090 struct ieee80211_local *local = sdata->local;
1091 struct ieee80211_sub_if_data *vsdata;
1092
1093 if (ieee80211_set_sdata_offload_flags(sdata)) {
1094 drv_update_vif_offload(local, sdata);
1095 ieee80211_set_vif_encap_ops(sdata);
1096 }
1097
1098 list_for_each_entry(vsdata, &local->interfaces, list) {
1099 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1100 vsdata->bss != &sdata->u.ap)
1101 continue;
1102
1103 ieee80211_set_vif_encap_ops(vsdata);
1104 }
1105 }
1106
ieee80211_recalc_offload(struct ieee80211_local * local)1107 void ieee80211_recalc_offload(struct ieee80211_local *local)
1108 {
1109 struct ieee80211_sub_if_data *sdata;
1110
1111 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1112 return;
1113
1114 lockdep_assert_wiphy(local->hw.wiphy);
1115
1116 list_for_each_entry(sdata, &local->interfaces, list) {
1117 if (!ieee80211_sdata_running(sdata))
1118 continue;
1119
1120 ieee80211_recalc_sdata_offload(sdata);
1121 }
1122 }
1123
ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data * sdata,const int offset)1124 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1125 const int offset)
1126 {
1127 struct ieee80211_local *local = sdata->local;
1128 u32 flags = sdata->u.mntr.flags;
1129
1130 #define ADJUST(_f, _s) do { \
1131 if (flags & MONITOR_FLAG_##_f) \
1132 local->fif_##_s += offset; \
1133 } while (0)
1134
1135 ADJUST(FCSFAIL, fcsfail);
1136 ADJUST(PLCPFAIL, plcpfail);
1137 ADJUST(CONTROL, control);
1138 ADJUST(CONTROL, pspoll);
1139 ADJUST(OTHER_BSS, other_bss);
1140 if (!(flags & MONITOR_FLAG_SKIP_TX))
1141 local->tx_mntrs += offset;
1142
1143 #undef ADJUST
1144 }
1145
ieee80211_set_default_queues(struct ieee80211_sub_if_data * sdata)1146 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1147 {
1148 struct ieee80211_local *local = sdata->local;
1149 int i;
1150
1151 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1152 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1153 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1154 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1155 sdata->vif.hw_queue[i] = i;
1156 else
1157 sdata->vif.hw_queue[i] = 0;
1158 }
1159 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1160 }
1161
ieee80211_sdata_init(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1162 static void ieee80211_sdata_init(struct ieee80211_local *local,
1163 struct ieee80211_sub_if_data *sdata)
1164 {
1165 sdata->local = local;
1166
1167 INIT_LIST_HEAD(&sdata->key_list);
1168
1169 /*
1170 * Initialize the default link, so we can use link_id 0 for non-MLD,
1171 * and that continues to work for non-MLD-aware drivers that use just
1172 * vif.bss_conf instead of vif.link_conf.
1173 *
1174 * Note that we never change this, so if link ID 0 isn't used in an
1175 * MLD connection, we get a separate allocation for it.
1176 */
1177 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1178 }
1179
ieee80211_add_virtual_monitor(struct ieee80211_local * local,struct ieee80211_sub_if_data * creator_sdata)1180 int ieee80211_add_virtual_monitor(struct ieee80211_local *local,
1181 struct ieee80211_sub_if_data *creator_sdata)
1182 {
1183 struct ieee80211_sub_if_data *sdata;
1184 int ret;
1185
1186 ASSERT_RTNL();
1187 lockdep_assert_wiphy(local->hw.wiphy);
1188
1189 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1190 return 0;
1191
1192 /* Already have a monitor set up, configure it */
1193 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1194 if (sdata)
1195 goto configure_monitor;
1196
1197 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1198 if (!sdata)
1199 return -ENOMEM;
1200
1201 /* set up data */
1202 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1203 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1204 wiphy_name(local->hw.wiphy));
1205 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1206 sdata->wdev.wiphy = local->hw.wiphy;
1207
1208 ieee80211_sdata_init(local, sdata);
1209
1210 ieee80211_set_default_queues(sdata);
1211
1212 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1213 ret = drv_add_interface(local, sdata);
1214 if (WARN_ON(ret)) {
1215 /* ok .. stupid driver, it asked for this! */
1216 kfree(sdata);
1217 return ret;
1218 }
1219 }
1220
1221 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1222
1223 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1224 if (ret) {
1225 kfree(sdata);
1226 return ret;
1227 }
1228
1229 mutex_lock(&local->iflist_mtx);
1230 rcu_assign_pointer(local->monitor_sdata, sdata);
1231 mutex_unlock(&local->iflist_mtx);
1232
1233 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq,
1234 IEEE80211_CHANCTX_EXCLUSIVE);
1235 if (ret) {
1236 mutex_lock(&local->iflist_mtx);
1237 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1238 mutex_unlock(&local->iflist_mtx);
1239 synchronize_net();
1240 drv_remove_interface(local, sdata);
1241 kfree(sdata);
1242 return ret;
1243 }
1244
1245 skb_queue_head_init(&sdata->skb_queue);
1246 skb_queue_head_init(&sdata->status_queue);
1247 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1248
1249 configure_monitor:
1250 /* Copy in the MU-MIMO configuration if set */
1251 if (!creator_sdata) {
1252 struct ieee80211_sub_if_data *other;
1253
1254 list_for_each_entry(other, &local->mon_list, list) {
1255 if (!other->vif.bss_conf.mu_mimo_owner)
1256 continue;
1257
1258 creator_sdata = other;
1259 break;
1260 }
1261 }
1262
1263 if (creator_sdata && creator_sdata->vif.bss_conf.mu_mimo_owner) {
1264 sdata->vif.bss_conf.mu_mimo_owner = true;
1265 memcpy(&sdata->vif.bss_conf.mu_group,
1266 &creator_sdata->vif.bss_conf.mu_group,
1267 sizeof(sdata->vif.bss_conf.mu_group));
1268 memcpy(&sdata->u.mntr.mu_follow_addr,
1269 creator_sdata->u.mntr.mu_follow_addr, ETH_ALEN);
1270
1271 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1272 BSS_CHANGED_MU_GROUPS);
1273 }
1274
1275 return 0;
1276 }
1277
ieee80211_del_virtual_monitor(struct ieee80211_local * local)1278 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1279 {
1280 struct ieee80211_sub_if_data *sdata;
1281
1282 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1283 return;
1284
1285 ASSERT_RTNL();
1286 lockdep_assert_wiphy(local->hw.wiphy);
1287
1288 mutex_lock(&local->iflist_mtx);
1289
1290 sdata = rcu_dereference_protected(local->monitor_sdata,
1291 lockdep_is_held(&local->iflist_mtx));
1292 if (!sdata) {
1293 mutex_unlock(&local->iflist_mtx);
1294 return;
1295 }
1296
1297 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1298 ieee80211_link_release_channel(&sdata->deflink);
1299
1300 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1301 drv_remove_interface(local, sdata);
1302
1303 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1304 mutex_unlock(&local->iflist_mtx);
1305
1306 synchronize_net();
1307
1308 kfree(sdata);
1309 }
1310
1311 /*
1312 * NOTE: Be very careful when changing this function, it must NOT return
1313 * an error on interface type changes that have been pre-checked, so most
1314 * checks should be in ieee80211_check_concurrent_iface.
1315 */
ieee80211_do_open(struct wireless_dev * wdev,bool coming_up)1316 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1317 {
1318 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1319 struct net_device *dev = wdev->netdev;
1320 struct ieee80211_local *local = sdata->local;
1321 u64 changed = 0;
1322 int res;
1323 u32 hw_reconf_flags = 0;
1324
1325 lockdep_assert_wiphy(local->hw.wiphy);
1326
1327 switch (sdata->vif.type) {
1328 case NL80211_IFTYPE_AP_VLAN: {
1329 struct ieee80211_sub_if_data *master;
1330
1331 if (!sdata->bss)
1332 return -ENOLINK;
1333
1334 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1335
1336 master = container_of(sdata->bss,
1337 struct ieee80211_sub_if_data, u.ap);
1338 sdata->control_port_protocol =
1339 master->control_port_protocol;
1340 sdata->control_port_no_encrypt =
1341 master->control_port_no_encrypt;
1342 sdata->control_port_over_nl80211 =
1343 master->control_port_over_nl80211;
1344 sdata->control_port_no_preauth =
1345 master->control_port_no_preauth;
1346 sdata->vif.cab_queue = master->vif.cab_queue;
1347 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1348 sizeof(sdata->vif.hw_queue));
1349 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq;
1350
1351 sdata->crypto_tx_tailroom_needed_cnt +=
1352 master->crypto_tx_tailroom_needed_cnt;
1353
1354 ieee80211_apvlan_link_setup(sdata);
1355
1356 break;
1357 }
1358 case NL80211_IFTYPE_AP:
1359 sdata->bss = &sdata->u.ap;
1360 break;
1361 case NL80211_IFTYPE_MESH_POINT:
1362 case NL80211_IFTYPE_STATION:
1363 case NL80211_IFTYPE_MONITOR:
1364 case NL80211_IFTYPE_ADHOC:
1365 case NL80211_IFTYPE_P2P_DEVICE:
1366 case NL80211_IFTYPE_OCB:
1367 case NL80211_IFTYPE_NAN:
1368 /* no special treatment */
1369 break;
1370 case NL80211_IFTYPE_UNSPECIFIED:
1371 case NUM_NL80211_IFTYPES:
1372 case NL80211_IFTYPE_P2P_CLIENT:
1373 case NL80211_IFTYPE_P2P_GO:
1374 case NL80211_IFTYPE_WDS:
1375 /* cannot happen */
1376 WARN_ON(1);
1377 break;
1378 }
1379
1380 if (local->open_count == 0) {
1381 /* here we can consider everything in good order (again) */
1382 local->reconfig_failure = false;
1383
1384 res = drv_start(local);
1385 if (res)
1386 goto err_del_bss;
1387 ieee80211_led_radio(local, true);
1388 ieee80211_mod_tpt_led_trig(local,
1389 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1390 }
1391
1392 /*
1393 * Copy the hopefully now-present MAC address to
1394 * this interface, if it has the special null one.
1395 */
1396 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1397 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1398 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1399
1400 if (!is_valid_ether_addr(dev->dev_addr)) {
1401 res = -EADDRNOTAVAIL;
1402 goto err_stop;
1403 }
1404 }
1405
1406 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
1407 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
1408 switch (sdata->vif.type) {
1409 case NL80211_IFTYPE_AP_VLAN:
1410 /* no need to tell driver, but set carrier and chanctx */
1411 if (sdata->bss->active) {
1412 struct ieee80211_link_data *link;
1413
1414 for_each_link_data(sdata, link) {
1415 ieee80211_link_vlan_copy_chanctx(link);
1416 }
1417
1418 netif_carrier_on(dev);
1419 ieee80211_set_vif_encap_ops(sdata);
1420 } else {
1421 netif_carrier_off(dev);
1422 }
1423 break;
1424 case NL80211_IFTYPE_MONITOR:
1425 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1426 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
1427 res = drv_add_interface(local, sdata);
1428 if (res)
1429 goto err_stop;
1430 } else {
1431 /* add/configure if there is no non-monitor interface */
1432 if (local->virt_monitors == local->open_count) {
1433 res = ieee80211_add_virtual_monitor(local, sdata);
1434 if (res)
1435 goto err_stop;
1436 }
1437
1438 local->virt_monitors++;
1439
1440 /* must be before the call to ieee80211_configure_filter */
1441 if (local->virt_monitors == 1) {
1442 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1443 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1444 }
1445 }
1446
1447 local->monitors++;
1448
1449 ieee80211_adjust_monitor_flags(sdata, 1);
1450 ieee80211_configure_filter(local);
1451 ieee80211_recalc_offload(local);
1452 ieee80211_recalc_idle(local);
1453
1454 netif_carrier_on(dev);
1455 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1456 break;
1457 default:
1458 if (coming_up) {
1459 ieee80211_del_virtual_monitor(local);
1460 ieee80211_set_sdata_offload_flags(sdata);
1461
1462 res = drv_add_interface(local, sdata);
1463 if (res)
1464 goto err_stop;
1465
1466 ieee80211_set_vif_encap_ops(sdata);
1467 res = ieee80211_check_queues(sdata,
1468 ieee80211_vif_type_p2p(&sdata->vif));
1469 if (res)
1470 goto err_del_interface;
1471 }
1472
1473 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1474 local->fif_pspoll++;
1475 local->fif_probe_req++;
1476
1477 ieee80211_configure_filter(local);
1478 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1479 local->fif_probe_req++;
1480 }
1481
1482 if (sdata->vif.probe_req_reg)
1483 drv_config_iface_filter(local, sdata,
1484 FIF_PROBE_REQ,
1485 FIF_PROBE_REQ);
1486
1487 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1488 sdata->vif.type != NL80211_IFTYPE_NAN)
1489 changed |= ieee80211_reset_erp_info(sdata);
1490 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1491 changed);
1492
1493 switch (sdata->vif.type) {
1494 case NL80211_IFTYPE_STATION:
1495 case NL80211_IFTYPE_ADHOC:
1496 case NL80211_IFTYPE_AP:
1497 case NL80211_IFTYPE_MESH_POINT:
1498 case NL80211_IFTYPE_OCB:
1499 netif_carrier_off(dev);
1500 break;
1501 case NL80211_IFTYPE_P2P_DEVICE:
1502 case NL80211_IFTYPE_NAN:
1503 break;
1504 default:
1505 /* not reached */
1506 WARN_ON(1);
1507 }
1508
1509 /*
1510 * Set default queue parameters so drivers don't
1511 * need to initialise the hardware if the hardware
1512 * doesn't start up with sane defaults.
1513 * Enable QoS for anything but station interfaces.
1514 */
1515 ieee80211_set_wmm_default(&sdata->deflink, true,
1516 sdata->vif.type != NL80211_IFTYPE_STATION);
1517 }
1518
1519 /*
1520 * set_multicast_list will be invoked by the networking core
1521 * which will check whether any increments here were done in
1522 * error and sync them down to the hardware as filter flags.
1523 */
1524 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1525 atomic_inc(&local->iff_allmultis);
1526
1527 if (coming_up)
1528 local->open_count++;
1529
1530 if (local->open_count == 1)
1531 ieee80211_hw_conf_init(local);
1532 else if (hw_reconf_flags)
1533 ieee80211_hw_config(local, -1, hw_reconf_flags);
1534
1535 ieee80211_recalc_ps(local);
1536
1537 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1538
1539 return 0;
1540 err_del_interface:
1541 drv_remove_interface(local, sdata);
1542 err_stop:
1543 if (!local->open_count)
1544 drv_stop(local, false);
1545 err_del_bss:
1546 sdata->bss = NULL;
1547 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1548 list_del(&sdata->u.vlan.list);
1549 /* might already be clear but that doesn't matter */
1550 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1551 return res;
1552 }
1553
ieee80211_if_setup(struct net_device * dev)1554 static void ieee80211_if_setup(struct net_device *dev)
1555 {
1556 ether_setup(dev);
1557 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1558 dev->priv_flags |= IFF_NO_QUEUE;
1559 dev->netdev_ops = &ieee80211_dataif_ops;
1560 dev->needs_free_netdev = true;
1561 }
1562
ieee80211_iface_process_skb(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1563 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1564 struct ieee80211_sub_if_data *sdata,
1565 struct sk_buff *skb)
1566 {
1567 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1568
1569 lockdep_assert_wiphy(local->hw.wiphy);
1570
1571 if (ieee80211_is_action(mgmt->frame_control) &&
1572 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1573 struct sta_info *sta;
1574 int len = skb->len;
1575
1576 sta = sta_info_get_bss(sdata, mgmt->sa);
1577 if (sta) {
1578 switch (mgmt->u.action.u.addba_req.action_code) {
1579 case WLAN_ACTION_ADDBA_REQ:
1580 ieee80211_process_addba_request(local, sta,
1581 mgmt, len);
1582 break;
1583 case WLAN_ACTION_ADDBA_RESP:
1584 ieee80211_process_addba_resp(local, sta,
1585 mgmt, len);
1586 break;
1587 case WLAN_ACTION_DELBA:
1588 ieee80211_process_delba(sdata, sta,
1589 mgmt, len);
1590 break;
1591 default:
1592 WARN_ON(1);
1593 break;
1594 }
1595 }
1596 } else if (ieee80211_is_action(mgmt->frame_control) &&
1597 mgmt->u.action.category == WLAN_CATEGORY_HT) {
1598 switch (mgmt->u.action.u.ht_smps.action) {
1599 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
1600 u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
1601 struct ieee80211_rx_status *status;
1602 struct link_sta_info *link_sta;
1603 struct sta_info *sta;
1604
1605 sta = sta_info_get_bss(sdata, mgmt->sa);
1606 if (!sta)
1607 break;
1608
1609 status = IEEE80211_SKB_RXCB(skb);
1610 if (!status->link_valid)
1611 link_sta = &sta->deflink;
1612 else
1613 link_sta = rcu_dereference_protected(sta->link[status->link_id],
1614 lockdep_is_held(&local->hw.wiphy->mtx));
1615 if (link_sta)
1616 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta,
1617 link_sta, chanwidth,
1618 status->band);
1619 break;
1620 }
1621 default:
1622 WARN_ON(1);
1623 break;
1624 }
1625 } else if (ieee80211_is_action(mgmt->frame_control) &&
1626 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1627 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1628 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1629 struct ieee80211_rx_status *status;
1630 enum nl80211_band band;
1631 struct sta_info *sta;
1632 u8 opmode;
1633
1634 status = IEEE80211_SKB_RXCB(skb);
1635 band = status->band;
1636 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1637
1638 sta = sta_info_get_bss(sdata, mgmt->sa);
1639
1640 if (sta)
1641 ieee80211_vht_handle_opmode(sdata,
1642 &sta->deflink,
1643 opmode, band);
1644
1645 break;
1646 }
1647 case WLAN_VHT_ACTION_GROUPID_MGMT:
1648 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1649 mgmt);
1650 break;
1651 default:
1652 WARN_ON(1);
1653 break;
1654 }
1655 } else if (ieee80211_is_action(mgmt->frame_control) &&
1656 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1657 switch (mgmt->u.action.u.s1g.action_code) {
1658 case WLAN_S1G_TWT_TEARDOWN:
1659 case WLAN_S1G_TWT_SETUP:
1660 ieee80211_s1g_rx_twt_action(sdata, skb);
1661 break;
1662 default:
1663 break;
1664 }
1665 } else if (ieee80211_is_action(mgmt->frame_control) &&
1666 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) {
1667 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1668 switch (mgmt->u.action.u.ttlm_req.action_code) {
1669 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
1670 ieee80211_process_neg_ttlm_req(sdata, mgmt,
1671 skb->len);
1672 break;
1673 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
1674 ieee80211_process_neg_ttlm_res(sdata, mgmt,
1675 skb->len);
1676 break;
1677 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
1678 ieee80211_process_ttlm_teardown(sdata);
1679 break;
1680 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
1681 ieee80211_process_ml_reconf_resp(sdata, mgmt,
1682 skb->len);
1683 break;
1684 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
1685 ieee80211_process_epcs_ena_resp(sdata, mgmt,
1686 skb->len);
1687 break;
1688 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
1689 ieee80211_process_epcs_teardown(sdata, mgmt,
1690 skb->len);
1691 break;
1692 default:
1693 break;
1694 }
1695 }
1696 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1697 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1698 ieee80211_sta_rx_queued_ext(sdata, skb);
1699 else
1700 WARN_ON(1);
1701 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1702 struct ieee80211_hdr *hdr = (void *)mgmt;
1703 struct sta_info *sta;
1704
1705 /*
1706 * So the frame isn't mgmt, but frame_control
1707 * is at the right place anyway, of course, so
1708 * the if statement is correct.
1709 *
1710 * Warn if we have other data frame types here,
1711 * they must not get here.
1712 */
1713 WARN_ON(hdr->frame_control &
1714 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1715 WARN_ON(!(hdr->seq_ctrl &
1716 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1717 /*
1718 * This was a fragment of a frame, received while
1719 * a block-ack session was active. That cannot be
1720 * right, so terminate the session.
1721 */
1722 sta = sta_info_get_bss(sdata, mgmt->sa);
1723 if (sta) {
1724 u16 tid = ieee80211_get_tid(hdr);
1725
1726 __ieee80211_stop_rx_ba_session(
1727 sta, tid, WLAN_BACK_RECIPIENT,
1728 WLAN_REASON_QSTA_REQUIRE_SETUP,
1729 true);
1730 }
1731 } else switch (sdata->vif.type) {
1732 case NL80211_IFTYPE_STATION:
1733 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1734 break;
1735 case NL80211_IFTYPE_ADHOC:
1736 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1737 break;
1738 case NL80211_IFTYPE_MESH_POINT:
1739 if (!ieee80211_vif_is_mesh(&sdata->vif))
1740 break;
1741 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1742 break;
1743 default:
1744 WARN(1, "frame for unexpected interface type");
1745 break;
1746 }
1747 }
1748
ieee80211_iface_process_status(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1749 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1750 struct sk_buff *skb)
1751 {
1752 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1753
1754 if (ieee80211_is_action(mgmt->frame_control) &&
1755 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1756 switch (mgmt->u.action.u.s1g.action_code) {
1757 case WLAN_S1G_TWT_TEARDOWN:
1758 case WLAN_S1G_TWT_SETUP:
1759 ieee80211_s1g_status_twt_action(sdata, skb);
1760 break;
1761 default:
1762 break;
1763 }
1764 }
1765 }
1766
ieee80211_iface_work(struct wiphy * wiphy,struct wiphy_work * work)1767 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1768 {
1769 struct ieee80211_sub_if_data *sdata =
1770 container_of(work, struct ieee80211_sub_if_data, work);
1771 struct ieee80211_local *local = sdata->local;
1772 struct sk_buff *skb;
1773
1774 if (!ieee80211_sdata_running(sdata))
1775 return;
1776
1777 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1778 return;
1779
1780 if (!ieee80211_can_run_worker(local))
1781 return;
1782
1783 /* first process frames */
1784 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1785 kcov_remote_start_common(skb_get_kcov_handle(skb));
1786
1787 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1788 ieee80211_process_tdls_channel_switch(sdata, skb);
1789 else
1790 ieee80211_iface_process_skb(local, sdata, skb);
1791
1792 kfree_skb(skb);
1793 kcov_remote_stop();
1794 }
1795
1796 /* process status queue */
1797 while ((skb = skb_dequeue(&sdata->status_queue))) {
1798 kcov_remote_start_common(skb_get_kcov_handle(skb));
1799
1800 ieee80211_iface_process_status(sdata, skb);
1801 kfree_skb(skb);
1802
1803 kcov_remote_stop();
1804 }
1805
1806 /* then other type-dependent work */
1807 switch (sdata->vif.type) {
1808 case NL80211_IFTYPE_STATION:
1809 ieee80211_sta_work(sdata);
1810 break;
1811 case NL80211_IFTYPE_ADHOC:
1812 ieee80211_ibss_work(sdata);
1813 break;
1814 case NL80211_IFTYPE_MESH_POINT:
1815 if (!ieee80211_vif_is_mesh(&sdata->vif))
1816 break;
1817 ieee80211_mesh_work(sdata);
1818 break;
1819 case NL80211_IFTYPE_OCB:
1820 ieee80211_ocb_work(sdata);
1821 break;
1822 default:
1823 break;
1824 }
1825 }
1826
ieee80211_activate_links_work(struct wiphy * wiphy,struct wiphy_work * work)1827 static void ieee80211_activate_links_work(struct wiphy *wiphy,
1828 struct wiphy_work *work)
1829 {
1830 struct ieee80211_sub_if_data *sdata =
1831 container_of(work, struct ieee80211_sub_if_data,
1832 activate_links_work);
1833 struct ieee80211_local *local = wiphy_priv(wiphy);
1834
1835 if (local->in_reconfig)
1836 return;
1837
1838 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1839 sdata->desired_active_links = 0;
1840 }
1841
1842 /*
1843 * Helper function to initialise an interface to a specific type.
1844 */
ieee80211_setup_sdata(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1845 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1846 enum nl80211_iftype type)
1847 {
1848 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1849 0xff, 0xff, 0xff};
1850
1851 /* clear type-dependent unions */
1852 memset(&sdata->u, 0, sizeof(sdata->u));
1853 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1854
1855 /* and set some type-dependent values */
1856 sdata->vif.type = type;
1857 sdata->vif.p2p = false;
1858 sdata->wdev.iftype = type;
1859
1860 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1861 sdata->control_port_no_encrypt = false;
1862 sdata->control_port_over_nl80211 = false;
1863 sdata->control_port_no_preauth = false;
1864 sdata->vif.cfg.idle = true;
1865 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1866
1867 sdata->noack_map = 0;
1868
1869 /* only monitor/p2p-device differ */
1870 if (sdata->dev) {
1871 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1872 sdata->dev->type = ARPHRD_ETHER;
1873 }
1874
1875 skb_queue_head_init(&sdata->skb_queue);
1876 skb_queue_head_init(&sdata->status_queue);
1877 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1878 wiphy_work_init(&sdata->activate_links_work,
1879 ieee80211_activate_links_work);
1880
1881 switch (type) {
1882 case NL80211_IFTYPE_P2P_GO:
1883 type = NL80211_IFTYPE_AP;
1884 sdata->vif.type = type;
1885 sdata->vif.p2p = true;
1886 fallthrough;
1887 case NL80211_IFTYPE_AP:
1888 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1889 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1890 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1891 break;
1892 case NL80211_IFTYPE_P2P_CLIENT:
1893 type = NL80211_IFTYPE_STATION;
1894 sdata->vif.type = type;
1895 sdata->vif.p2p = true;
1896 fallthrough;
1897 case NL80211_IFTYPE_STATION:
1898 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1899 ieee80211_sta_setup_sdata(sdata);
1900 break;
1901 case NL80211_IFTYPE_OCB:
1902 sdata->vif.bss_conf.bssid = bssid_wildcard;
1903 ieee80211_ocb_setup_sdata(sdata);
1904 break;
1905 case NL80211_IFTYPE_ADHOC:
1906 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1907 ieee80211_ibss_setup_sdata(sdata);
1908 break;
1909 case NL80211_IFTYPE_MESH_POINT:
1910 if (ieee80211_vif_is_mesh(&sdata->vif))
1911 ieee80211_mesh_init_sdata(sdata);
1912 break;
1913 case NL80211_IFTYPE_MONITOR:
1914 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1915 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1916 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1917 MONITOR_FLAG_OTHER_BSS;
1918 break;
1919 case NL80211_IFTYPE_NAN:
1920 idr_init(&sdata->u.nan.function_inst_ids);
1921 spin_lock_init(&sdata->u.nan.func_lock);
1922 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1923 break;
1924 case NL80211_IFTYPE_AP_VLAN:
1925 case NL80211_IFTYPE_P2P_DEVICE:
1926 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1927 break;
1928 case NL80211_IFTYPE_UNSPECIFIED:
1929 case NL80211_IFTYPE_WDS:
1930 case NUM_NL80211_IFTYPES:
1931 WARN_ON(1);
1932 break;
1933 }
1934
1935 /* need to do this after the switch so vif.type is correct */
1936 ieee80211_link_setup(&sdata->deflink);
1937
1938 ieee80211_debugfs_recreate_netdev(sdata, false);
1939 }
1940
ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1941 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1942 enum nl80211_iftype type)
1943 {
1944 struct ieee80211_local *local = sdata->local;
1945 int ret, err;
1946 enum nl80211_iftype internal_type = type;
1947 bool p2p = false;
1948
1949 ASSERT_RTNL();
1950
1951 if (!local->ops->change_interface)
1952 return -EBUSY;
1953
1954 /* for now, don't support changing while links exist */
1955 if (ieee80211_vif_is_mld(&sdata->vif))
1956 return -EBUSY;
1957
1958 switch (sdata->vif.type) {
1959 case NL80211_IFTYPE_AP:
1960 if (!list_empty(&sdata->u.ap.vlans))
1961 return -EBUSY;
1962 break;
1963 case NL80211_IFTYPE_STATION:
1964 case NL80211_IFTYPE_ADHOC:
1965 case NL80211_IFTYPE_OCB:
1966 /*
1967 * Could maybe also all others here?
1968 * Just not sure how that interacts
1969 * with the RX/config path e.g. for
1970 * mesh.
1971 */
1972 break;
1973 default:
1974 return -EBUSY;
1975 }
1976
1977 switch (type) {
1978 case NL80211_IFTYPE_AP:
1979 case NL80211_IFTYPE_STATION:
1980 case NL80211_IFTYPE_ADHOC:
1981 case NL80211_IFTYPE_OCB:
1982 /*
1983 * Could probably support everything
1984 * but here.
1985 */
1986 break;
1987 case NL80211_IFTYPE_P2P_CLIENT:
1988 p2p = true;
1989 internal_type = NL80211_IFTYPE_STATION;
1990 break;
1991 case NL80211_IFTYPE_P2P_GO:
1992 p2p = true;
1993 internal_type = NL80211_IFTYPE_AP;
1994 break;
1995 default:
1996 return -EBUSY;
1997 }
1998
1999 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
2000 if (ret)
2001 return ret;
2002
2003 ieee80211_stop_vif_queues(local, sdata,
2004 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
2005 /* do_stop will synchronize_rcu() first thing */
2006 ieee80211_do_stop(sdata, false);
2007
2008 ieee80211_teardown_sdata(sdata);
2009
2010 ieee80211_set_sdata_offload_flags(sdata);
2011 ret = drv_change_interface(local, sdata, internal_type, p2p);
2012 if (ret)
2013 type = ieee80211_vif_type_p2p(&sdata->vif);
2014
2015 /*
2016 * Ignore return value here, there's not much we can do since
2017 * the driver changed the interface type internally already.
2018 * The warnings will hopefully make driver authors fix it :-)
2019 */
2020 ieee80211_check_queues(sdata, type);
2021
2022 ieee80211_setup_sdata(sdata, type);
2023 ieee80211_set_vif_encap_ops(sdata);
2024
2025 err = ieee80211_do_open(&sdata->wdev, false);
2026 WARN(err, "type change: do_open returned %d", err);
2027
2028 ieee80211_wake_vif_queues(local, sdata,
2029 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
2030 return ret;
2031 }
2032
ieee80211_if_change_type(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)2033 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
2034 enum nl80211_iftype type)
2035 {
2036 int ret;
2037
2038 ASSERT_RTNL();
2039
2040 if (type == ieee80211_vif_type_p2p(&sdata->vif))
2041 return 0;
2042
2043 if (ieee80211_sdata_running(sdata)) {
2044 ret = ieee80211_runtime_change_iftype(sdata, type);
2045 if (ret)
2046 return ret;
2047 } else {
2048 /* Purge and reset type-dependent state. */
2049 ieee80211_teardown_sdata(sdata);
2050 ieee80211_setup_sdata(sdata, type);
2051 }
2052
2053 /* reset some values that shouldn't be kept across type changes */
2054 if (type == NL80211_IFTYPE_STATION)
2055 sdata->u.mgd.use_4addr = false;
2056
2057 return 0;
2058 }
2059
ieee80211_assign_perm_addr(struct ieee80211_local * local,u8 * perm_addr,enum nl80211_iftype type)2060 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
2061 u8 *perm_addr, enum nl80211_iftype type)
2062 {
2063 struct ieee80211_sub_if_data *sdata;
2064 u64 mask, start, addr, val, inc;
2065 u8 *m;
2066 u8 tmp_addr[ETH_ALEN];
2067 int i;
2068
2069 lockdep_assert_wiphy(local->hw.wiphy);
2070
2071 /* default ... something at least */
2072 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
2073
2074 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
2075 local->hw.wiphy->n_addresses <= 1)
2076 return;
2077
2078 switch (type) {
2079 case NL80211_IFTYPE_MONITOR:
2080 /* doesn't matter */
2081 break;
2082 case NL80211_IFTYPE_AP_VLAN:
2083 /* match up with an AP interface */
2084 list_for_each_entry(sdata, &local->interfaces, list) {
2085 if (sdata->vif.type != NL80211_IFTYPE_AP)
2086 continue;
2087 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2088 break;
2089 }
2090 /* keep default if no AP interface present */
2091 break;
2092 case NL80211_IFTYPE_P2P_CLIENT:
2093 case NL80211_IFTYPE_P2P_GO:
2094 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
2095 list_for_each_entry(sdata, &local->interfaces, list) {
2096 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
2097 continue;
2098 if (!ieee80211_sdata_running(sdata))
2099 continue;
2100 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2101 return;
2102 }
2103 }
2104 fallthrough;
2105 default:
2106 /* assign a new address if possible -- try n_addresses first */
2107 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
2108 bool used = false;
2109
2110 list_for_each_entry(sdata, &local->interfaces, list) {
2111 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
2112 sdata->vif.addr)) {
2113 used = true;
2114 break;
2115 }
2116 }
2117
2118 if (!used) {
2119 memcpy(perm_addr,
2120 local->hw.wiphy->addresses[i].addr,
2121 ETH_ALEN);
2122 break;
2123 }
2124 }
2125
2126 /* try mask if available */
2127 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
2128 break;
2129
2130 m = local->hw.wiphy->addr_mask;
2131 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2132 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2133 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2134
2135 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
2136 /* not a contiguous mask ... not handled now! */
2137 pr_info("not contiguous\n");
2138 break;
2139 }
2140
2141 /*
2142 * Pick address of existing interface in case user changed
2143 * MAC address manually, default to perm_addr.
2144 */
2145 m = local->hw.wiphy->perm_addr;
2146 list_for_each_entry(sdata, &local->interfaces, list) {
2147 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2148 continue;
2149 m = sdata->vif.addr;
2150 break;
2151 }
2152 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2153 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2154 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2155
2156 inc = 1ULL<<__ffs64(mask);
2157 val = (start & mask);
2158 addr = (start & ~mask) | (val & mask);
2159 do {
2160 bool used = false;
2161
2162 tmp_addr[5] = addr >> 0*8;
2163 tmp_addr[4] = addr >> 1*8;
2164 tmp_addr[3] = addr >> 2*8;
2165 tmp_addr[2] = addr >> 3*8;
2166 tmp_addr[1] = addr >> 4*8;
2167 tmp_addr[0] = addr >> 5*8;
2168
2169 val += inc;
2170
2171 list_for_each_entry(sdata, &local->interfaces, list) {
2172 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2173 used = true;
2174 break;
2175 }
2176 }
2177
2178 if (!used) {
2179 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2180 break;
2181 }
2182 addr = (start & ~mask) | (val & mask);
2183 } while (addr != start);
2184
2185 break;
2186 }
2187 }
2188
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)2189 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2190 unsigned char name_assign_type,
2191 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2192 struct vif_params *params)
2193 {
2194 struct net_device *ndev = NULL;
2195 struct ieee80211_sub_if_data *sdata = NULL;
2196 struct txq_info *txqi;
2197 int ret, i;
2198
2199 ASSERT_RTNL();
2200 lockdep_assert_wiphy(local->hw.wiphy);
2201
2202 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2203 struct wireless_dev *wdev;
2204
2205 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2206 GFP_KERNEL);
2207 if (!sdata)
2208 return -ENOMEM;
2209 wdev = &sdata->wdev;
2210
2211 sdata->dev = NULL;
2212 strscpy(sdata->name, name, IFNAMSIZ);
2213 ieee80211_assign_perm_addr(local, wdev->address, type);
2214 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2215 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2216 } else {
2217 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2218 sizeof(void *));
2219 int txq_size = 0;
2220
2221 if (type != NL80211_IFTYPE_AP_VLAN &&
2222 (type != NL80211_IFTYPE_MONITOR ||
2223 (params->flags & MONITOR_FLAG_ACTIVE)))
2224 txq_size += sizeof(struct txq_info) +
2225 local->hw.txq_data_size;
2226
2227 ndev = alloc_netdev_mqs(size + txq_size,
2228 name, name_assign_type,
2229 ieee80211_if_setup, 1, 1);
2230 if (!ndev)
2231 return -ENOMEM;
2232
2233 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2234
2235 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2236
2237 ndev->needed_headroom = local->tx_headroom +
2238 4*6 /* four MAC addresses */
2239 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2240 + 6 /* mesh */
2241 + 8 /* rfc1042/bridge tunnel */
2242 - ETH_HLEN /* ethernet hard_header_len */
2243 + IEEE80211_ENCRYPT_HEADROOM;
2244 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2245
2246 ret = dev_alloc_name(ndev, ndev->name);
2247 if (ret < 0) {
2248 free_netdev(ndev);
2249 return ret;
2250 }
2251
2252 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2253 if (is_valid_ether_addr(params->macaddr))
2254 eth_hw_addr_set(ndev, params->macaddr);
2255 else
2256 eth_hw_addr_set(ndev, ndev->perm_addr);
2257 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2258
2259 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2260 sdata = netdev_priv(ndev);
2261 ndev->ieee80211_ptr = &sdata->wdev;
2262 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2263 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2264 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2265
2266 if (txq_size) {
2267 txqi = netdev_priv(ndev) + size;
2268 ieee80211_txq_init(sdata, NULL, txqi, 0);
2269 }
2270
2271 sdata->dev = ndev;
2272 }
2273
2274 /* initialise type-independent data */
2275 sdata->wdev.wiphy = local->hw.wiphy;
2276
2277 ieee80211_sdata_init(local, sdata);
2278
2279 ieee80211_init_frag_cache(&sdata->frags);
2280
2281 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
2282 ieee80211_delayed_tailroom_dec);
2283
2284 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2285 struct ieee80211_supported_band *sband;
2286 sband = local->hw.wiphy->bands[i];
2287 sdata->rc_rateidx_mask[i] =
2288 sband ? (1 << sband->n_bitrates) - 1 : 0;
2289 if (sband) {
2290 __le16 cap;
2291 u16 *vht_rate_mask;
2292
2293 memcpy(sdata->rc_rateidx_mcs_mask[i],
2294 sband->ht_cap.mcs.rx_mask,
2295 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2296
2297 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2298 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2299 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2300 } else {
2301 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2302 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2303 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2304 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2305 }
2306 }
2307
2308 ieee80211_set_default_queues(sdata);
2309
2310 /* setup type-dependent data */
2311 ieee80211_setup_sdata(sdata, type);
2312
2313 if (ndev) {
2314 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2315 if (type == NL80211_IFTYPE_STATION)
2316 sdata->u.mgd.use_4addr = params->use_4addr;
2317
2318 ndev->features |= local->hw.netdev_features;
2319 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2320 ndev->hw_features |= ndev->features &
2321 MAC80211_SUPPORTED_FEATURES_TX;
2322 sdata->vif.netdev_features = local->hw.netdev_features;
2323
2324 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2325
2326 /* MTU range is normally 256 - 2304, where the upper limit is
2327 * the maximum MSDU size. Monitor interfaces send and receive
2328 * MPDU and A-MSDU frames which may be much larger so we do
2329 * not impose an upper limit in that case.
2330 */
2331 ndev->min_mtu = 256;
2332 if (type == NL80211_IFTYPE_MONITOR)
2333 ndev->max_mtu = 0;
2334 else
2335 ndev->max_mtu = local->hw.max_mtu;
2336
2337 ret = cfg80211_register_netdevice(ndev);
2338 if (ret) {
2339 free_netdev(ndev);
2340 return ret;
2341 }
2342 }
2343
2344 mutex_lock(&local->iflist_mtx);
2345 list_add_tail_rcu(&sdata->list, &local->interfaces);
2346 mutex_unlock(&local->iflist_mtx);
2347
2348 if (new_wdev)
2349 *new_wdev = &sdata->wdev;
2350
2351 return 0;
2352 }
2353
ieee80211_if_remove(struct ieee80211_sub_if_data * sdata)2354 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2355 {
2356 ASSERT_RTNL();
2357 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2358
2359 mutex_lock(&sdata->local->iflist_mtx);
2360 list_del_rcu(&sdata->list);
2361 mutex_unlock(&sdata->local->iflist_mtx);
2362
2363 if (sdata->vif.txq)
2364 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2365
2366 synchronize_rcu();
2367
2368 cfg80211_unregister_wdev(&sdata->wdev);
2369
2370 if (!sdata->dev) {
2371 ieee80211_teardown_sdata(sdata);
2372 kfree(sdata);
2373 }
2374 }
2375
ieee80211_sdata_stop(struct ieee80211_sub_if_data * sdata)2376 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2377 {
2378 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2379 return;
2380 ieee80211_do_stop(sdata, true);
2381 }
2382
ieee80211_remove_interfaces(struct ieee80211_local * local)2383 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2384 {
2385 struct ieee80211_sub_if_data *sdata, *tmp;
2386 LIST_HEAD(unreg_list);
2387
2388 ASSERT_RTNL();
2389
2390 /* Before destroying the interfaces, make sure they're all stopped so
2391 * that the hardware is stopped. Otherwise, the driver might still be
2392 * iterating the interfaces during the shutdown, e.g. from a worker
2393 * or from RX processing or similar, and if it does so (using atomic
2394 * iteration) while we're manipulating the list, the iteration will
2395 * crash.
2396 *
2397 * After this, the hardware should be stopped and the driver should
2398 * have stopped all of its activities, so that we can do RCU-unaware
2399 * manipulations of the interface list below.
2400 */
2401 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2402
2403 guard(wiphy)(local->hw.wiphy);
2404
2405 WARN(local->open_count, "%s: open count remains %d\n",
2406 wiphy_name(local->hw.wiphy), local->open_count);
2407
2408 mutex_lock(&local->iflist_mtx);
2409 list_splice_init(&local->interfaces, &unreg_list);
2410 mutex_unlock(&local->iflist_mtx);
2411
2412 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2413 bool netdev = sdata->dev;
2414
2415 /*
2416 * Remove IP addresses explicitly, since the notifier will
2417 * skip the callbacks if wdev->registered is false, since
2418 * we can't acquire the wiphy_lock() again there if already
2419 * inside this locked section.
2420 */
2421 sdata->vif.cfg.arp_addr_cnt = 0;
2422 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2423 sdata->u.mgd.associated)
2424 ieee80211_vif_cfg_change_notify(sdata,
2425 BSS_CHANGED_ARP_FILTER);
2426
2427 list_del(&sdata->list);
2428 cfg80211_unregister_wdev(&sdata->wdev);
2429
2430 if (!netdev)
2431 kfree(sdata);
2432 }
2433 }
2434
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)2435 static int netdev_notify(struct notifier_block *nb,
2436 unsigned long state, void *ptr)
2437 {
2438 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2439 struct ieee80211_sub_if_data *sdata;
2440
2441 if (state != NETDEV_CHANGENAME)
2442 return NOTIFY_DONE;
2443
2444 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2445 return NOTIFY_DONE;
2446
2447 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2448 return NOTIFY_DONE;
2449
2450 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2451 memcpy(sdata->name, dev->name, IFNAMSIZ);
2452 ieee80211_debugfs_rename_netdev(sdata);
2453
2454 return NOTIFY_OK;
2455 }
2456
2457 static struct notifier_block mac80211_netdev_notifier = {
2458 .notifier_call = netdev_notify,
2459 };
2460
ieee80211_iface_init(void)2461 int ieee80211_iface_init(void)
2462 {
2463 return register_netdevice_notifier(&mac80211_netdev_notifier);
2464 }
2465
ieee80211_iface_exit(void)2466 void ieee80211_iface_exit(void)
2467 {
2468 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2469 }
2470
ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data * sdata)2471 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2472 {
2473 if (sdata->vif.type == NL80211_IFTYPE_AP)
2474 atomic_inc(&sdata->u.ap.num_mcast_sta);
2475 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2476 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2477 }
2478
ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data * sdata)2479 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2480 {
2481 if (sdata->vif.type == NL80211_IFTYPE_AP)
2482 atomic_dec(&sdata->u.ap.num_mcast_sta);
2483 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2484 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2485 }
2486
ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data * sdata)2487 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
2488 {
2489 struct ieee80211_local *local = sdata->local;
2490
2491 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
2492 return;
2493
2494 ieee80211_stop_vif_queues_norefcount(local, sdata,
2495 IEEE80211_QUEUE_STOP_REASON_CSA);
2496 }
2497
ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data * sdata)2498 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
2499 {
2500 struct ieee80211_local *local = sdata->local;
2501
2502 ieee80211_wake_vif_queues_norefcount(local, sdata,
2503 IEEE80211_QUEUE_STOP_REASON_CSA);
2504 }
2505