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 if (local->virt_monitors == local->open_count)
745 ieee80211_add_virtual_monitor(local);
746 }
747
ieee80211_stop_mbssid(struct ieee80211_sub_if_data * sdata)748 void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
749 {
750 struct ieee80211_sub_if_data *tx_sdata;
751 struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
752 struct ieee80211_link_data *tx_link, *link;
753 unsigned int link_id;
754
755 lockdep_assert_wiphy(sdata->local->hw.wiphy);
756
757 /* Check if any of the links of current sdata is an MBSSID. */
758 for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
759 tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata);
760 if (!tx_bss_conf)
761 continue;
762
763 tx_sdata = vif_to_sdata(tx_bss_conf->vif);
764 RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
765
766 /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion
767 * while closing tx sdata at the end of outer loop below.
768 */
769 if (sdata != tx_sdata) {
770 tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id],
771 tx_sdata);
772 if (!tx_link)
773 continue;
774
775 RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL);
776 }
777
778 /* loop through sdatas to find if any of their links
779 * belong to same MBSSID set as the one getting deleted.
780 */
781 for_each_sdata_link(tx_sdata->local, link) {
782 struct ieee80211_sub_if_data *link_sdata = link->sdata;
783
784 if (link_sdata == sdata || link_sdata == tx_sdata ||
785 rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf)
786 continue;
787
788 RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL);
789
790 /* Remove all links of matching MLD until dynamic link
791 * removal can be supported.
792 */
793 cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev,
794 GFP_KERNEL);
795 }
796
797 /* If we are not tx sdata, remove links of tx sdata and proceed */
798 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata))
799 cfg80211_stop_iface(tx_sdata->wdev.wiphy,
800 &tx_sdata->wdev, GFP_KERNEL);
801 }
802 }
803
ieee80211_stop(struct net_device * dev)804 static int ieee80211_stop(struct net_device *dev)
805 {
806 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
807
808 /* close dependent VLAN interfaces before locking wiphy */
809 if (sdata->vif.type == NL80211_IFTYPE_AP) {
810 struct ieee80211_sub_if_data *vlan, *tmpsdata;
811
812 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
813 u.vlan.list)
814 dev_close(vlan->dev);
815 }
816
817 guard(wiphy)(sdata->local->hw.wiphy);
818
819 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
820
821 /* Close the dependent MBSSID interfaces with wiphy lock as we may be
822 * terminating its partner links too in case of MLD.
823 */
824 if (sdata->vif.type == NL80211_IFTYPE_AP)
825 ieee80211_stop_mbssid(sdata);
826
827 ieee80211_do_stop(sdata, true);
828
829 return 0;
830 }
831
ieee80211_set_multicast_list(struct net_device * dev)832 static void ieee80211_set_multicast_list(struct net_device *dev)
833 {
834 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
835 struct ieee80211_local *local = sdata->local;
836 int allmulti, sdata_allmulti;
837
838 allmulti = !!(dev->flags & IFF_ALLMULTI);
839 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
840
841 if (allmulti != sdata_allmulti) {
842 if (dev->flags & IFF_ALLMULTI)
843 atomic_inc(&local->iff_allmultis);
844 else
845 atomic_dec(&local->iff_allmultis);
846 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
847 }
848
849 spin_lock_bh(&local->filter_lock);
850 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
851 spin_unlock_bh(&local->filter_lock);
852 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter);
853 }
854
855 /*
856 * Called when the netdev is removed or, by the code below, before
857 * the interface type changes.
858 */
ieee80211_teardown_sdata(struct ieee80211_sub_if_data * sdata)859 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
860 {
861 if (WARN_ON(!list_empty(&sdata->work.entry)))
862 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
863
864 /* free extra data */
865 ieee80211_free_keys(sdata, false);
866
867 ieee80211_debugfs_remove_netdev(sdata);
868
869 ieee80211_destroy_frag_cache(&sdata->frags);
870
871 if (ieee80211_vif_is_mesh(&sdata->vif))
872 ieee80211_mesh_teardown_sdata(sdata);
873
874 ieee80211_vif_clear_links(sdata);
875 ieee80211_link_stop(&sdata->deflink);
876 }
877
ieee80211_uninit(struct net_device * dev)878 static void ieee80211_uninit(struct net_device *dev)
879 {
880 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
881 }
882
ieee80211_netdev_setup_tc(struct net_device * dev,enum tc_setup_type type,void * type_data)883 static int ieee80211_netdev_setup_tc(struct net_device *dev,
884 enum tc_setup_type type, void *type_data)
885 {
886 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
887 struct ieee80211_local *local = sdata->local;
888
889 return drv_net_setup_tc(local, sdata, dev, type, type_data);
890 }
891
892 static const struct net_device_ops ieee80211_dataif_ops = {
893 .ndo_open = ieee80211_open,
894 .ndo_stop = ieee80211_stop,
895 .ndo_uninit = ieee80211_uninit,
896 .ndo_start_xmit = ieee80211_subif_start_xmit,
897 .ndo_set_rx_mode = ieee80211_set_multicast_list,
898 .ndo_set_mac_address = ieee80211_change_mac,
899 .ndo_setup_tc = ieee80211_netdev_setup_tc,
900 };
901
ieee80211_monitor_select_queue(struct net_device * dev,struct sk_buff * skb,struct net_device * sb_dev)902 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
903 struct sk_buff *skb,
904 struct net_device *sb_dev)
905 {
906 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
907 struct ieee80211_local *local = sdata->local;
908 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
909 struct ieee80211_hdr *hdr;
910 int len_rthdr;
911
912 if (local->hw.queues < IEEE80211_NUM_ACS)
913 return 0;
914
915 /* reset flags and info before parsing radiotap header */
916 memset(info, 0, sizeof(*info));
917
918 if (!ieee80211_parse_tx_radiotap(skb, dev))
919 return 0; /* doesn't matter, frame will be dropped */
920
921 len_rthdr = ieee80211_get_radiotap_len(skb->data);
922 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
923 if (skb->len < len_rthdr + 2 ||
924 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
925 return 0; /* doesn't matter, frame will be dropped */
926
927 return ieee80211_select_queue_80211(sdata, skb, hdr);
928 }
929
930 static const struct net_device_ops ieee80211_monitorif_ops = {
931 .ndo_open = ieee80211_open,
932 .ndo_stop = ieee80211_stop,
933 .ndo_uninit = ieee80211_uninit,
934 .ndo_start_xmit = ieee80211_monitor_start_xmit,
935 .ndo_set_rx_mode = ieee80211_set_multicast_list,
936 .ndo_set_mac_address = ieee80211_change_mac,
937 .ndo_select_queue = ieee80211_monitor_select_queue,
938 };
939
ieee80211_netdev_fill_forward_path(struct net_device_path_ctx * ctx,struct net_device_path * path)940 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
941 struct net_device_path *path)
942 {
943 struct ieee80211_sub_if_data *sdata;
944 struct ieee80211_local *local;
945 struct sta_info *sta;
946 int ret = -ENOENT;
947
948 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
949 local = sdata->local;
950
951 if (!local->ops->net_fill_forward_path)
952 return -EOPNOTSUPP;
953
954 rcu_read_lock();
955 switch (sdata->vif.type) {
956 case NL80211_IFTYPE_AP_VLAN:
957 sta = rcu_dereference(sdata->u.vlan.sta);
958 if (sta)
959 break;
960 if (sdata->wdev.use_4addr)
961 goto out;
962 if (is_multicast_ether_addr(ctx->daddr))
963 goto out;
964 sta = sta_info_get_bss(sdata, ctx->daddr);
965 break;
966 case NL80211_IFTYPE_AP:
967 if (is_multicast_ether_addr(ctx->daddr))
968 goto out;
969 sta = sta_info_get(sdata, ctx->daddr);
970 break;
971 case NL80211_IFTYPE_STATION:
972 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
973 sta = sta_info_get(sdata, ctx->daddr);
974 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
975 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
976 goto out;
977
978 break;
979 }
980 }
981
982 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
983 break;
984 default:
985 goto out;
986 }
987
988 if (!sta)
989 goto out;
990
991 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
992 out:
993 rcu_read_unlock();
994
995 return ret;
996 }
997
998 static const struct net_device_ops ieee80211_dataif_8023_ops = {
999 .ndo_open = ieee80211_open,
1000 .ndo_stop = ieee80211_stop,
1001 .ndo_uninit = ieee80211_uninit,
1002 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1003 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1004 .ndo_set_mac_address = ieee80211_change_mac,
1005 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
1006 .ndo_setup_tc = ieee80211_netdev_setup_tc,
1007 };
1008
ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)1009 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
1010 {
1011 switch (iftype) {
1012 /* P2P GO and client are mapped to AP/STATION types */
1013 case NL80211_IFTYPE_AP:
1014 case NL80211_IFTYPE_STATION:
1015 return true;
1016 default:
1017 return false;
1018 }
1019 }
1020
ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data * sdata)1021 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
1022 {
1023 struct ieee80211_local *local = sdata->local;
1024 u32 flags;
1025
1026 flags = sdata->vif.offload_flags;
1027
1028 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
1029 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1030 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
1031
1032 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1033 local->hw.wiphy->frag_threshold != (u32)-1)
1034 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1035
1036 if (local->virt_monitors)
1037 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1038 } else {
1039 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
1040 }
1041
1042 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
1043 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
1044 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
1045
1046 if (local->virt_monitors &&
1047 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
1048 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1049 } else {
1050 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
1051 }
1052
1053 if (sdata->vif.offload_flags == flags)
1054 return false;
1055
1056 sdata->vif.offload_flags = flags;
1057 ieee80211_check_fast_rx_iface(sdata);
1058 return true;
1059 }
1060
ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data * sdata)1061 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1062 {
1063 struct ieee80211_local *local = sdata->local;
1064 struct ieee80211_sub_if_data *bss = sdata;
1065 bool enabled;
1066
1067 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1068 if (!sdata->bss)
1069 return;
1070
1071 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1072 }
1073
1074 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1075 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1076 return;
1077
1078 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1079 if (sdata->wdev.use_4addr &&
1080 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1081 enabled = false;
1082
1083 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1084 &ieee80211_dataif_ops;
1085 }
1086
ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data * sdata)1087 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1088 {
1089 struct ieee80211_local *local = sdata->local;
1090 struct ieee80211_sub_if_data *vsdata;
1091
1092 if (ieee80211_set_sdata_offload_flags(sdata)) {
1093 drv_update_vif_offload(local, sdata);
1094 ieee80211_set_vif_encap_ops(sdata);
1095 }
1096
1097 list_for_each_entry(vsdata, &local->interfaces, list) {
1098 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1099 vsdata->bss != &sdata->u.ap)
1100 continue;
1101
1102 ieee80211_set_vif_encap_ops(vsdata);
1103 }
1104 }
1105
ieee80211_recalc_offload(struct ieee80211_local * local)1106 void ieee80211_recalc_offload(struct ieee80211_local *local)
1107 {
1108 struct ieee80211_sub_if_data *sdata;
1109
1110 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1111 return;
1112
1113 lockdep_assert_wiphy(local->hw.wiphy);
1114
1115 list_for_each_entry(sdata, &local->interfaces, list) {
1116 if (!ieee80211_sdata_running(sdata))
1117 continue;
1118
1119 ieee80211_recalc_sdata_offload(sdata);
1120 }
1121 }
1122
ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data * sdata,const int offset)1123 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1124 const int offset)
1125 {
1126 struct ieee80211_local *local = sdata->local;
1127 u32 flags = sdata->u.mntr.flags;
1128
1129 #define ADJUST(_f, _s) do { \
1130 if (flags & MONITOR_FLAG_##_f) \
1131 local->fif_##_s += offset; \
1132 } while (0)
1133
1134 ADJUST(FCSFAIL, fcsfail);
1135 ADJUST(PLCPFAIL, plcpfail);
1136 ADJUST(CONTROL, control);
1137 ADJUST(CONTROL, pspoll);
1138 ADJUST(OTHER_BSS, other_bss);
1139 if (!(flags & MONITOR_FLAG_SKIP_TX))
1140 local->tx_mntrs += offset;
1141
1142 #undef ADJUST
1143 }
1144
ieee80211_set_default_queues(struct ieee80211_sub_if_data * sdata)1145 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1146 {
1147 struct ieee80211_local *local = sdata->local;
1148 int i;
1149
1150 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1151 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1152 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1153 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1154 sdata->vif.hw_queue[i] = i;
1155 else
1156 sdata->vif.hw_queue[i] = 0;
1157 }
1158 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1159 }
1160
ieee80211_sdata_init(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1161 static void ieee80211_sdata_init(struct ieee80211_local *local,
1162 struct ieee80211_sub_if_data *sdata)
1163 {
1164 sdata->local = local;
1165
1166 INIT_LIST_HEAD(&sdata->key_list);
1167
1168 /*
1169 * Initialize the default link, so we can use link_id 0 for non-MLD,
1170 * and that continues to work for non-MLD-aware drivers that use just
1171 * vif.bss_conf instead of vif.link_conf.
1172 *
1173 * Note that we never change this, so if link ID 0 isn't used in an
1174 * MLD connection, we get a separate allocation for it.
1175 */
1176 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1177 }
1178
ieee80211_add_virtual_monitor(struct ieee80211_local * local)1179 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1180 {
1181 struct ieee80211_sub_if_data *sdata;
1182 int ret;
1183
1184 ASSERT_RTNL();
1185 lockdep_assert_wiphy(local->hw.wiphy);
1186
1187 if (local->monitor_sdata ||
1188 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1189 return 0;
1190
1191 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1192 if (!sdata)
1193 return -ENOMEM;
1194
1195 /* set up data */
1196 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1197 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1198 wiphy_name(local->hw.wiphy));
1199 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1200 sdata->wdev.wiphy = local->hw.wiphy;
1201
1202 ieee80211_sdata_init(local, sdata);
1203
1204 ieee80211_set_default_queues(sdata);
1205
1206 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1207 ret = drv_add_interface(local, sdata);
1208 if (WARN_ON(ret)) {
1209 /* ok .. stupid driver, it asked for this! */
1210 kfree(sdata);
1211 return ret;
1212 }
1213 }
1214
1215 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1216
1217 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1218 if (ret) {
1219 kfree(sdata);
1220 return ret;
1221 }
1222
1223 mutex_lock(&local->iflist_mtx);
1224 rcu_assign_pointer(local->monitor_sdata, sdata);
1225 mutex_unlock(&local->iflist_mtx);
1226
1227 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chanreq,
1228 IEEE80211_CHANCTX_EXCLUSIVE);
1229 if (ret) {
1230 mutex_lock(&local->iflist_mtx);
1231 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1232 mutex_unlock(&local->iflist_mtx);
1233 synchronize_net();
1234 drv_remove_interface(local, sdata);
1235 kfree(sdata);
1236 return ret;
1237 }
1238
1239 skb_queue_head_init(&sdata->skb_queue);
1240 skb_queue_head_init(&sdata->status_queue);
1241 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1242
1243 return 0;
1244 }
1245
ieee80211_del_virtual_monitor(struct ieee80211_local * local)1246 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1247 {
1248 struct ieee80211_sub_if_data *sdata;
1249
1250 if (ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1251 return;
1252
1253 ASSERT_RTNL();
1254 lockdep_assert_wiphy(local->hw.wiphy);
1255
1256 mutex_lock(&local->iflist_mtx);
1257
1258 sdata = rcu_dereference_protected(local->monitor_sdata,
1259 lockdep_is_held(&local->iflist_mtx));
1260 if (!sdata) {
1261 mutex_unlock(&local->iflist_mtx);
1262 return;
1263 }
1264
1265 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1266 ieee80211_link_release_channel(&sdata->deflink);
1267
1268 if (ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1269 drv_remove_interface(local, sdata);
1270
1271 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1272 mutex_unlock(&local->iflist_mtx);
1273
1274 synchronize_net();
1275
1276 kfree(sdata);
1277 }
1278
1279 /*
1280 * NOTE: Be very careful when changing this function, it must NOT return
1281 * an error on interface type changes that have been pre-checked, so most
1282 * checks should be in ieee80211_check_concurrent_iface.
1283 */
ieee80211_do_open(struct wireless_dev * wdev,bool coming_up)1284 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1285 {
1286 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1287 struct net_device *dev = wdev->netdev;
1288 struct ieee80211_local *local = sdata->local;
1289 u64 changed = 0;
1290 int res;
1291 u32 hw_reconf_flags = 0;
1292
1293 lockdep_assert_wiphy(local->hw.wiphy);
1294
1295 switch (sdata->vif.type) {
1296 case NL80211_IFTYPE_AP_VLAN: {
1297 struct ieee80211_sub_if_data *master;
1298
1299 if (!sdata->bss)
1300 return -ENOLINK;
1301
1302 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1303
1304 master = container_of(sdata->bss,
1305 struct ieee80211_sub_if_data, u.ap);
1306 sdata->control_port_protocol =
1307 master->control_port_protocol;
1308 sdata->control_port_no_encrypt =
1309 master->control_port_no_encrypt;
1310 sdata->control_port_over_nl80211 =
1311 master->control_port_over_nl80211;
1312 sdata->control_port_no_preauth =
1313 master->control_port_no_preauth;
1314 sdata->vif.cab_queue = master->vif.cab_queue;
1315 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1316 sizeof(sdata->vif.hw_queue));
1317 sdata->vif.bss_conf.chanreq = master->vif.bss_conf.chanreq;
1318
1319 sdata->crypto_tx_tailroom_needed_cnt +=
1320 master->crypto_tx_tailroom_needed_cnt;
1321
1322 ieee80211_apvlan_link_setup(sdata);
1323
1324 break;
1325 }
1326 case NL80211_IFTYPE_AP:
1327 sdata->bss = &sdata->u.ap;
1328 break;
1329 case NL80211_IFTYPE_MESH_POINT:
1330 case NL80211_IFTYPE_STATION:
1331 case NL80211_IFTYPE_MONITOR:
1332 case NL80211_IFTYPE_ADHOC:
1333 case NL80211_IFTYPE_P2P_DEVICE:
1334 case NL80211_IFTYPE_OCB:
1335 case NL80211_IFTYPE_NAN:
1336 /* no special treatment */
1337 break;
1338 case NL80211_IFTYPE_UNSPECIFIED:
1339 case NUM_NL80211_IFTYPES:
1340 case NL80211_IFTYPE_P2P_CLIENT:
1341 case NL80211_IFTYPE_P2P_GO:
1342 case NL80211_IFTYPE_WDS:
1343 /* cannot happen */
1344 WARN_ON(1);
1345 break;
1346 }
1347
1348 if (local->open_count == 0) {
1349 /* here we can consider everything in good order (again) */
1350 local->reconfig_failure = false;
1351
1352 res = drv_start(local);
1353 if (res)
1354 goto err_del_bss;
1355 ieee80211_led_radio(local, true);
1356 ieee80211_mod_tpt_led_trig(local,
1357 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1358 }
1359
1360 /*
1361 * Copy the hopefully now-present MAC address to
1362 * this interface, if it has the special null one.
1363 */
1364 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1365 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1366 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1367
1368 if (!is_valid_ether_addr(dev->dev_addr)) {
1369 res = -EADDRNOTAVAIL;
1370 goto err_stop;
1371 }
1372 }
1373
1374 sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
1375 (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
1376 switch (sdata->vif.type) {
1377 case NL80211_IFTYPE_AP_VLAN:
1378 /* no need to tell driver, but set carrier and chanctx */
1379 if (sdata->bss->active) {
1380 struct ieee80211_link_data *link;
1381
1382 for_each_link_data(sdata, link) {
1383 ieee80211_link_vlan_copy_chanctx(link);
1384 }
1385
1386 netif_carrier_on(dev);
1387 ieee80211_set_vif_encap_ops(sdata);
1388 } else {
1389 netif_carrier_off(dev);
1390 }
1391 break;
1392 case NL80211_IFTYPE_MONITOR:
1393 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1394 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
1395 res = drv_add_interface(local, sdata);
1396 if (res)
1397 goto err_stop;
1398 } else {
1399 if (local->virt_monitors == 0 && local->open_count == 0) {
1400 res = ieee80211_add_virtual_monitor(local);
1401 if (res)
1402 goto err_stop;
1403 }
1404 local->virt_monitors++;
1405
1406 /* must be before the call to ieee80211_configure_filter */
1407 if (local->virt_monitors == 1) {
1408 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1409 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1410 }
1411 }
1412
1413 local->monitors++;
1414
1415 ieee80211_adjust_monitor_flags(sdata, 1);
1416 ieee80211_configure_filter(local);
1417 ieee80211_recalc_offload(local);
1418 ieee80211_recalc_idle(local);
1419
1420 netif_carrier_on(dev);
1421 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1422 break;
1423 default:
1424 if (coming_up) {
1425 ieee80211_del_virtual_monitor(local);
1426 ieee80211_set_sdata_offload_flags(sdata);
1427
1428 res = drv_add_interface(local, sdata);
1429 if (res)
1430 goto err_stop;
1431
1432 ieee80211_set_vif_encap_ops(sdata);
1433 res = ieee80211_check_queues(sdata,
1434 ieee80211_vif_type_p2p(&sdata->vif));
1435 if (res)
1436 goto err_del_interface;
1437 }
1438
1439 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1440 local->fif_pspoll++;
1441 local->fif_probe_req++;
1442
1443 ieee80211_configure_filter(local);
1444 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1445 local->fif_probe_req++;
1446 }
1447
1448 if (sdata->vif.probe_req_reg)
1449 drv_config_iface_filter(local, sdata,
1450 FIF_PROBE_REQ,
1451 FIF_PROBE_REQ);
1452
1453 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1454 sdata->vif.type != NL80211_IFTYPE_NAN)
1455 changed |= ieee80211_reset_erp_info(sdata);
1456 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1457 changed);
1458
1459 switch (sdata->vif.type) {
1460 case NL80211_IFTYPE_STATION:
1461 case NL80211_IFTYPE_ADHOC:
1462 case NL80211_IFTYPE_AP:
1463 case NL80211_IFTYPE_MESH_POINT:
1464 case NL80211_IFTYPE_OCB:
1465 netif_carrier_off(dev);
1466 break;
1467 case NL80211_IFTYPE_P2P_DEVICE:
1468 case NL80211_IFTYPE_NAN:
1469 break;
1470 default:
1471 /* not reached */
1472 WARN_ON(1);
1473 }
1474
1475 /*
1476 * Set default queue parameters so drivers don't
1477 * need to initialise the hardware if the hardware
1478 * doesn't start up with sane defaults.
1479 * Enable QoS for anything but station interfaces.
1480 */
1481 ieee80211_set_wmm_default(&sdata->deflink, true,
1482 sdata->vif.type != NL80211_IFTYPE_STATION);
1483 }
1484
1485 /*
1486 * set_multicast_list will be invoked by the networking core
1487 * which will check whether any increments here were done in
1488 * error and sync them down to the hardware as filter flags.
1489 */
1490 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1491 atomic_inc(&local->iff_allmultis);
1492
1493 if (coming_up)
1494 local->open_count++;
1495
1496 if (local->open_count == 1)
1497 ieee80211_hw_conf_init(local);
1498 else if (hw_reconf_flags)
1499 ieee80211_hw_config(local, -1, hw_reconf_flags);
1500
1501 ieee80211_recalc_ps(local);
1502
1503 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1504
1505 return 0;
1506 err_del_interface:
1507 drv_remove_interface(local, sdata);
1508 err_stop:
1509 if (!local->open_count)
1510 drv_stop(local, false);
1511 err_del_bss:
1512 sdata->bss = NULL;
1513 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1514 list_del(&sdata->u.vlan.list);
1515 /* might already be clear but that doesn't matter */
1516 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1517 return res;
1518 }
1519
ieee80211_if_setup(struct net_device * dev)1520 static void ieee80211_if_setup(struct net_device *dev)
1521 {
1522 ether_setup(dev);
1523 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1524 dev->priv_flags |= IFF_NO_QUEUE;
1525 dev->netdev_ops = &ieee80211_dataif_ops;
1526 dev->needs_free_netdev = true;
1527 }
1528
ieee80211_iface_process_skb(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1529 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1530 struct ieee80211_sub_if_data *sdata,
1531 struct sk_buff *skb)
1532 {
1533 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1534
1535 lockdep_assert_wiphy(local->hw.wiphy);
1536
1537 if (ieee80211_is_action(mgmt->frame_control) &&
1538 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1539 struct sta_info *sta;
1540 int len = skb->len;
1541
1542 sta = sta_info_get_bss(sdata, mgmt->sa);
1543 if (sta) {
1544 switch (mgmt->u.action.u.addba_req.action_code) {
1545 case WLAN_ACTION_ADDBA_REQ:
1546 ieee80211_process_addba_request(local, sta,
1547 mgmt, len);
1548 break;
1549 case WLAN_ACTION_ADDBA_RESP:
1550 ieee80211_process_addba_resp(local, sta,
1551 mgmt, len);
1552 break;
1553 case WLAN_ACTION_DELBA:
1554 ieee80211_process_delba(sdata, sta,
1555 mgmt, len);
1556 break;
1557 default:
1558 WARN_ON(1);
1559 break;
1560 }
1561 }
1562 } else if (ieee80211_is_action(mgmt->frame_control) &&
1563 mgmt->u.action.category == WLAN_CATEGORY_HT) {
1564 switch (mgmt->u.action.u.ht_smps.action) {
1565 case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
1566 u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
1567 struct ieee80211_rx_status *status;
1568 struct link_sta_info *link_sta;
1569 struct sta_info *sta;
1570
1571 sta = sta_info_get_bss(sdata, mgmt->sa);
1572 if (!sta)
1573 break;
1574
1575 status = IEEE80211_SKB_RXCB(skb);
1576 if (!status->link_valid)
1577 link_sta = &sta->deflink;
1578 else
1579 link_sta = rcu_dereference_protected(sta->link[status->link_id],
1580 lockdep_is_held(&local->hw.wiphy->mtx));
1581 if (link_sta)
1582 ieee80211_ht_handle_chanwidth_notif(local, sdata, sta,
1583 link_sta, chanwidth,
1584 status->band);
1585 break;
1586 }
1587 default:
1588 WARN_ON(1);
1589 break;
1590 }
1591 } else if (ieee80211_is_action(mgmt->frame_control) &&
1592 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1593 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1594 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1595 struct ieee80211_rx_status *status;
1596 enum nl80211_band band;
1597 struct sta_info *sta;
1598 u8 opmode;
1599
1600 status = IEEE80211_SKB_RXCB(skb);
1601 band = status->band;
1602 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1603
1604 sta = sta_info_get_bss(sdata, mgmt->sa);
1605
1606 if (sta)
1607 ieee80211_vht_handle_opmode(sdata,
1608 &sta->deflink,
1609 opmode, band);
1610
1611 break;
1612 }
1613 case WLAN_VHT_ACTION_GROUPID_MGMT:
1614 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1615 mgmt);
1616 break;
1617 default:
1618 WARN_ON(1);
1619 break;
1620 }
1621 } else if (ieee80211_is_action(mgmt->frame_control) &&
1622 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1623 switch (mgmt->u.action.u.s1g.action_code) {
1624 case WLAN_S1G_TWT_TEARDOWN:
1625 case WLAN_S1G_TWT_SETUP:
1626 ieee80211_s1g_rx_twt_action(sdata, skb);
1627 break;
1628 default:
1629 break;
1630 }
1631 } else if (ieee80211_is_action(mgmt->frame_control) &&
1632 mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_EHT) {
1633 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1634 switch (mgmt->u.action.u.ttlm_req.action_code) {
1635 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
1636 ieee80211_process_neg_ttlm_req(sdata, mgmt,
1637 skb->len);
1638 break;
1639 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
1640 ieee80211_process_neg_ttlm_res(sdata, mgmt,
1641 skb->len);
1642 break;
1643 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
1644 ieee80211_process_ttlm_teardown(sdata);
1645 break;
1646 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
1647 ieee80211_process_ml_reconf_resp(sdata, mgmt,
1648 skb->len);
1649 break;
1650 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
1651 ieee80211_process_epcs_ena_resp(sdata, mgmt,
1652 skb->len);
1653 break;
1654 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
1655 ieee80211_process_epcs_teardown(sdata, mgmt,
1656 skb->len);
1657 break;
1658 default:
1659 break;
1660 }
1661 }
1662 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1663 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1664 ieee80211_sta_rx_queued_ext(sdata, skb);
1665 else
1666 WARN_ON(1);
1667 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1668 struct ieee80211_hdr *hdr = (void *)mgmt;
1669 struct sta_info *sta;
1670
1671 /*
1672 * So the frame isn't mgmt, but frame_control
1673 * is at the right place anyway, of course, so
1674 * the if statement is correct.
1675 *
1676 * Warn if we have other data frame types here,
1677 * they must not get here.
1678 */
1679 WARN_ON(hdr->frame_control &
1680 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1681 WARN_ON(!(hdr->seq_ctrl &
1682 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1683 /*
1684 * This was a fragment of a frame, received while
1685 * a block-ack session was active. That cannot be
1686 * right, so terminate the session.
1687 */
1688 sta = sta_info_get_bss(sdata, mgmt->sa);
1689 if (sta) {
1690 u16 tid = ieee80211_get_tid(hdr);
1691
1692 __ieee80211_stop_rx_ba_session(
1693 sta, tid, WLAN_BACK_RECIPIENT,
1694 WLAN_REASON_QSTA_REQUIRE_SETUP,
1695 true);
1696 }
1697 } else switch (sdata->vif.type) {
1698 case NL80211_IFTYPE_STATION:
1699 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1700 break;
1701 case NL80211_IFTYPE_ADHOC:
1702 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1703 break;
1704 case NL80211_IFTYPE_MESH_POINT:
1705 if (!ieee80211_vif_is_mesh(&sdata->vif))
1706 break;
1707 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1708 break;
1709 default:
1710 WARN(1, "frame for unexpected interface type");
1711 break;
1712 }
1713 }
1714
ieee80211_iface_process_status(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)1715 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1716 struct sk_buff *skb)
1717 {
1718 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1719
1720 if (ieee80211_is_action(mgmt->frame_control) &&
1721 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1722 switch (mgmt->u.action.u.s1g.action_code) {
1723 case WLAN_S1G_TWT_TEARDOWN:
1724 case WLAN_S1G_TWT_SETUP:
1725 ieee80211_s1g_status_twt_action(sdata, skb);
1726 break;
1727 default:
1728 break;
1729 }
1730 }
1731 }
1732
ieee80211_iface_work(struct wiphy * wiphy,struct wiphy_work * work)1733 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1734 {
1735 struct ieee80211_sub_if_data *sdata =
1736 container_of(work, struct ieee80211_sub_if_data, work);
1737 struct ieee80211_local *local = sdata->local;
1738 struct sk_buff *skb;
1739
1740 if (!ieee80211_sdata_running(sdata))
1741 return;
1742
1743 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1744 return;
1745
1746 if (!ieee80211_can_run_worker(local))
1747 return;
1748
1749 /* first process frames */
1750 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1751 kcov_remote_start_common(skb_get_kcov_handle(skb));
1752
1753 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1754 ieee80211_process_tdls_channel_switch(sdata, skb);
1755 else
1756 ieee80211_iface_process_skb(local, sdata, skb);
1757
1758 kfree_skb(skb);
1759 kcov_remote_stop();
1760 }
1761
1762 /* process status queue */
1763 while ((skb = skb_dequeue(&sdata->status_queue))) {
1764 kcov_remote_start_common(skb_get_kcov_handle(skb));
1765
1766 ieee80211_iface_process_status(sdata, skb);
1767 kfree_skb(skb);
1768
1769 kcov_remote_stop();
1770 }
1771
1772 /* then other type-dependent work */
1773 switch (sdata->vif.type) {
1774 case NL80211_IFTYPE_STATION:
1775 ieee80211_sta_work(sdata);
1776 break;
1777 case NL80211_IFTYPE_ADHOC:
1778 ieee80211_ibss_work(sdata);
1779 break;
1780 case NL80211_IFTYPE_MESH_POINT:
1781 if (!ieee80211_vif_is_mesh(&sdata->vif))
1782 break;
1783 ieee80211_mesh_work(sdata);
1784 break;
1785 case NL80211_IFTYPE_OCB:
1786 ieee80211_ocb_work(sdata);
1787 break;
1788 default:
1789 break;
1790 }
1791 }
1792
ieee80211_activate_links_work(struct wiphy * wiphy,struct wiphy_work * work)1793 static void ieee80211_activate_links_work(struct wiphy *wiphy,
1794 struct wiphy_work *work)
1795 {
1796 struct ieee80211_sub_if_data *sdata =
1797 container_of(work, struct ieee80211_sub_if_data,
1798 activate_links_work);
1799 struct ieee80211_local *local = wiphy_priv(wiphy);
1800
1801 if (local->in_reconfig)
1802 return;
1803
1804 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1805 sdata->desired_active_links = 0;
1806 }
1807
1808 /*
1809 * Helper function to initialise an interface to a specific type.
1810 */
ieee80211_setup_sdata(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1811 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1812 enum nl80211_iftype type)
1813 {
1814 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1815 0xff, 0xff, 0xff};
1816
1817 /* clear type-dependent unions */
1818 memset(&sdata->u, 0, sizeof(sdata->u));
1819 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1820
1821 /* and set some type-dependent values */
1822 sdata->vif.type = type;
1823 sdata->vif.p2p = false;
1824 sdata->wdev.iftype = type;
1825
1826 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1827 sdata->control_port_no_encrypt = false;
1828 sdata->control_port_over_nl80211 = false;
1829 sdata->control_port_no_preauth = false;
1830 sdata->vif.cfg.idle = true;
1831 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1832
1833 sdata->noack_map = 0;
1834
1835 /* only monitor/p2p-device differ */
1836 if (sdata->dev) {
1837 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1838 sdata->dev->type = ARPHRD_ETHER;
1839 }
1840
1841 skb_queue_head_init(&sdata->skb_queue);
1842 skb_queue_head_init(&sdata->status_queue);
1843 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1844 wiphy_work_init(&sdata->activate_links_work,
1845 ieee80211_activate_links_work);
1846
1847 switch (type) {
1848 case NL80211_IFTYPE_P2P_GO:
1849 type = NL80211_IFTYPE_AP;
1850 sdata->vif.type = type;
1851 sdata->vif.p2p = true;
1852 fallthrough;
1853 case NL80211_IFTYPE_AP:
1854 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1855 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1856 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1857 break;
1858 case NL80211_IFTYPE_P2P_CLIENT:
1859 type = NL80211_IFTYPE_STATION;
1860 sdata->vif.type = type;
1861 sdata->vif.p2p = true;
1862 fallthrough;
1863 case NL80211_IFTYPE_STATION:
1864 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1865 ieee80211_sta_setup_sdata(sdata);
1866 break;
1867 case NL80211_IFTYPE_OCB:
1868 sdata->vif.bss_conf.bssid = bssid_wildcard;
1869 ieee80211_ocb_setup_sdata(sdata);
1870 break;
1871 case NL80211_IFTYPE_ADHOC:
1872 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1873 ieee80211_ibss_setup_sdata(sdata);
1874 break;
1875 case NL80211_IFTYPE_MESH_POINT:
1876 if (ieee80211_vif_is_mesh(&sdata->vif))
1877 ieee80211_mesh_init_sdata(sdata);
1878 break;
1879 case NL80211_IFTYPE_MONITOR:
1880 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1881 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1882 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1883 MONITOR_FLAG_OTHER_BSS;
1884 break;
1885 case NL80211_IFTYPE_NAN:
1886 idr_init(&sdata->u.nan.function_inst_ids);
1887 spin_lock_init(&sdata->u.nan.func_lock);
1888 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1889 break;
1890 case NL80211_IFTYPE_AP_VLAN:
1891 case NL80211_IFTYPE_P2P_DEVICE:
1892 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1893 break;
1894 case NL80211_IFTYPE_UNSPECIFIED:
1895 case NL80211_IFTYPE_WDS:
1896 case NUM_NL80211_IFTYPES:
1897 WARN_ON(1);
1898 break;
1899 }
1900
1901 /* need to do this after the switch so vif.type is correct */
1902 ieee80211_link_setup(&sdata->deflink);
1903
1904 ieee80211_debugfs_recreate_netdev(sdata, false);
1905 }
1906
ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1907 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1908 enum nl80211_iftype type)
1909 {
1910 struct ieee80211_local *local = sdata->local;
1911 int ret, err;
1912 enum nl80211_iftype internal_type = type;
1913 bool p2p = false;
1914
1915 ASSERT_RTNL();
1916
1917 if (!local->ops->change_interface)
1918 return -EBUSY;
1919
1920 /* for now, don't support changing while links exist */
1921 if (ieee80211_vif_is_mld(&sdata->vif))
1922 return -EBUSY;
1923
1924 switch (sdata->vif.type) {
1925 case NL80211_IFTYPE_AP:
1926 if (!list_empty(&sdata->u.ap.vlans))
1927 return -EBUSY;
1928 break;
1929 case NL80211_IFTYPE_STATION:
1930 case NL80211_IFTYPE_ADHOC:
1931 case NL80211_IFTYPE_OCB:
1932 /*
1933 * Could maybe also all others here?
1934 * Just not sure how that interacts
1935 * with the RX/config path e.g. for
1936 * mesh.
1937 */
1938 break;
1939 default:
1940 return -EBUSY;
1941 }
1942
1943 switch (type) {
1944 case NL80211_IFTYPE_AP:
1945 case NL80211_IFTYPE_STATION:
1946 case NL80211_IFTYPE_ADHOC:
1947 case NL80211_IFTYPE_OCB:
1948 /*
1949 * Could probably support everything
1950 * but here.
1951 */
1952 break;
1953 case NL80211_IFTYPE_P2P_CLIENT:
1954 p2p = true;
1955 internal_type = NL80211_IFTYPE_STATION;
1956 break;
1957 case NL80211_IFTYPE_P2P_GO:
1958 p2p = true;
1959 internal_type = NL80211_IFTYPE_AP;
1960 break;
1961 default:
1962 return -EBUSY;
1963 }
1964
1965 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1966 if (ret)
1967 return ret;
1968
1969 ieee80211_stop_vif_queues(local, sdata,
1970 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1971 /* do_stop will synchronize_rcu() first thing */
1972 ieee80211_do_stop(sdata, false);
1973
1974 ieee80211_teardown_sdata(sdata);
1975
1976 ieee80211_set_sdata_offload_flags(sdata);
1977 ret = drv_change_interface(local, sdata, internal_type, p2p);
1978 if (ret)
1979 type = ieee80211_vif_type_p2p(&sdata->vif);
1980
1981 /*
1982 * Ignore return value here, there's not much we can do since
1983 * the driver changed the interface type internally already.
1984 * The warnings will hopefully make driver authors fix it :-)
1985 */
1986 ieee80211_check_queues(sdata, type);
1987
1988 ieee80211_setup_sdata(sdata, type);
1989 ieee80211_set_vif_encap_ops(sdata);
1990
1991 err = ieee80211_do_open(&sdata->wdev, false);
1992 WARN(err, "type change: do_open returned %d", err);
1993
1994 ieee80211_wake_vif_queues(local, sdata,
1995 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1996 return ret;
1997 }
1998
ieee80211_if_change_type(struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type)1999 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
2000 enum nl80211_iftype type)
2001 {
2002 int ret;
2003
2004 ASSERT_RTNL();
2005
2006 if (type == ieee80211_vif_type_p2p(&sdata->vif))
2007 return 0;
2008
2009 if (ieee80211_sdata_running(sdata)) {
2010 ret = ieee80211_runtime_change_iftype(sdata, type);
2011 if (ret)
2012 return ret;
2013 } else {
2014 /* Purge and reset type-dependent state. */
2015 ieee80211_teardown_sdata(sdata);
2016 ieee80211_setup_sdata(sdata, type);
2017 }
2018
2019 /* reset some values that shouldn't be kept across type changes */
2020 if (type == NL80211_IFTYPE_STATION)
2021 sdata->u.mgd.use_4addr = false;
2022
2023 return 0;
2024 }
2025
ieee80211_assign_perm_addr(struct ieee80211_local * local,u8 * perm_addr,enum nl80211_iftype type)2026 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
2027 u8 *perm_addr, enum nl80211_iftype type)
2028 {
2029 struct ieee80211_sub_if_data *sdata;
2030 u64 mask, start, addr, val, inc;
2031 u8 *m;
2032 u8 tmp_addr[ETH_ALEN];
2033 int i;
2034
2035 lockdep_assert_wiphy(local->hw.wiphy);
2036
2037 /* default ... something at least */
2038 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
2039
2040 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
2041 local->hw.wiphy->n_addresses <= 1)
2042 return;
2043
2044 switch (type) {
2045 case NL80211_IFTYPE_MONITOR:
2046 /* doesn't matter */
2047 break;
2048 case NL80211_IFTYPE_AP_VLAN:
2049 /* match up with an AP interface */
2050 list_for_each_entry(sdata, &local->interfaces, list) {
2051 if (sdata->vif.type != NL80211_IFTYPE_AP)
2052 continue;
2053 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2054 break;
2055 }
2056 /* keep default if no AP interface present */
2057 break;
2058 case NL80211_IFTYPE_P2P_CLIENT:
2059 case NL80211_IFTYPE_P2P_GO:
2060 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
2061 list_for_each_entry(sdata, &local->interfaces, list) {
2062 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
2063 continue;
2064 if (!ieee80211_sdata_running(sdata))
2065 continue;
2066 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
2067 return;
2068 }
2069 }
2070 fallthrough;
2071 default:
2072 /* assign a new address if possible -- try n_addresses first */
2073 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
2074 bool used = false;
2075
2076 list_for_each_entry(sdata, &local->interfaces, list) {
2077 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
2078 sdata->vif.addr)) {
2079 used = true;
2080 break;
2081 }
2082 }
2083
2084 if (!used) {
2085 memcpy(perm_addr,
2086 local->hw.wiphy->addresses[i].addr,
2087 ETH_ALEN);
2088 break;
2089 }
2090 }
2091
2092 /* try mask if available */
2093 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
2094 break;
2095
2096 m = local->hw.wiphy->addr_mask;
2097 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2098 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2099 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2100
2101 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
2102 /* not a contiguous mask ... not handled now! */
2103 pr_info("not contiguous\n");
2104 break;
2105 }
2106
2107 /*
2108 * Pick address of existing interface in case user changed
2109 * MAC address manually, default to perm_addr.
2110 */
2111 m = local->hw.wiphy->perm_addr;
2112 list_for_each_entry(sdata, &local->interfaces, list) {
2113 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
2114 continue;
2115 m = sdata->vif.addr;
2116 break;
2117 }
2118 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2119 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2120 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2121
2122 inc = 1ULL<<__ffs64(mask);
2123 val = (start & mask);
2124 addr = (start & ~mask) | (val & mask);
2125 do {
2126 bool used = false;
2127
2128 tmp_addr[5] = addr >> 0*8;
2129 tmp_addr[4] = addr >> 1*8;
2130 tmp_addr[3] = addr >> 2*8;
2131 tmp_addr[2] = addr >> 3*8;
2132 tmp_addr[1] = addr >> 4*8;
2133 tmp_addr[0] = addr >> 5*8;
2134
2135 val += inc;
2136
2137 list_for_each_entry(sdata, &local->interfaces, list) {
2138 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2139 used = true;
2140 break;
2141 }
2142 }
2143
2144 if (!used) {
2145 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2146 break;
2147 }
2148 addr = (start & ~mask) | (val & mask);
2149 } while (addr != start);
2150
2151 break;
2152 }
2153 }
2154
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)2155 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2156 unsigned char name_assign_type,
2157 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2158 struct vif_params *params)
2159 {
2160 struct net_device *ndev = NULL;
2161 struct ieee80211_sub_if_data *sdata = NULL;
2162 struct txq_info *txqi;
2163 int ret, i;
2164
2165 ASSERT_RTNL();
2166 lockdep_assert_wiphy(local->hw.wiphy);
2167
2168 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2169 struct wireless_dev *wdev;
2170
2171 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2172 GFP_KERNEL);
2173 if (!sdata)
2174 return -ENOMEM;
2175 wdev = &sdata->wdev;
2176
2177 sdata->dev = NULL;
2178 strscpy(sdata->name, name, IFNAMSIZ);
2179 ieee80211_assign_perm_addr(local, wdev->address, type);
2180 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2181 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2182 } else {
2183 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2184 sizeof(void *));
2185 int txq_size = 0;
2186
2187 if (type != NL80211_IFTYPE_AP_VLAN &&
2188 (type != NL80211_IFTYPE_MONITOR ||
2189 (params->flags & MONITOR_FLAG_ACTIVE)))
2190 txq_size += sizeof(struct txq_info) +
2191 local->hw.txq_data_size;
2192
2193 ndev = alloc_netdev_mqs(size + txq_size,
2194 name, name_assign_type,
2195 ieee80211_if_setup, 1, 1);
2196 if (!ndev)
2197 return -ENOMEM;
2198
2199 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2200
2201 ndev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
2202
2203 ndev->needed_headroom = local->tx_headroom +
2204 4*6 /* four MAC addresses */
2205 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2206 + 6 /* mesh */
2207 + 8 /* rfc1042/bridge tunnel */
2208 - ETH_HLEN /* ethernet hard_header_len */
2209 + IEEE80211_ENCRYPT_HEADROOM;
2210 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2211
2212 ret = dev_alloc_name(ndev, ndev->name);
2213 if (ret < 0) {
2214 free_netdev(ndev);
2215 return ret;
2216 }
2217
2218 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2219 if (is_valid_ether_addr(params->macaddr))
2220 eth_hw_addr_set(ndev, params->macaddr);
2221 else
2222 eth_hw_addr_set(ndev, ndev->perm_addr);
2223 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2224
2225 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2226 sdata = netdev_priv(ndev);
2227 ndev->ieee80211_ptr = &sdata->wdev;
2228 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2229 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2230 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2231
2232 if (txq_size) {
2233 txqi = netdev_priv(ndev) + size;
2234 ieee80211_txq_init(sdata, NULL, txqi, 0);
2235 }
2236
2237 sdata->dev = ndev;
2238 }
2239
2240 /* initialise type-independent data */
2241 sdata->wdev.wiphy = local->hw.wiphy;
2242
2243 ieee80211_sdata_init(local, sdata);
2244
2245 ieee80211_init_frag_cache(&sdata->frags);
2246
2247 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
2248 ieee80211_delayed_tailroom_dec);
2249
2250 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2251 struct ieee80211_supported_band *sband;
2252 sband = local->hw.wiphy->bands[i];
2253 sdata->rc_rateidx_mask[i] =
2254 sband ? (1 << sband->n_bitrates) - 1 : 0;
2255 if (sband) {
2256 __le16 cap;
2257 u16 *vht_rate_mask;
2258
2259 memcpy(sdata->rc_rateidx_mcs_mask[i],
2260 sband->ht_cap.mcs.rx_mask,
2261 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2262
2263 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2264 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2265 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2266 } else {
2267 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2268 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2269 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2270 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2271 }
2272 }
2273
2274 ieee80211_set_default_queues(sdata);
2275
2276 /* setup type-dependent data */
2277 ieee80211_setup_sdata(sdata, type);
2278
2279 if (ndev) {
2280 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2281 if (type == NL80211_IFTYPE_STATION)
2282 sdata->u.mgd.use_4addr = params->use_4addr;
2283
2284 ndev->features |= local->hw.netdev_features;
2285 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2286 ndev->hw_features |= ndev->features &
2287 MAC80211_SUPPORTED_FEATURES_TX;
2288 sdata->vif.netdev_features = local->hw.netdev_features;
2289
2290 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2291
2292 /* MTU range is normally 256 - 2304, where the upper limit is
2293 * the maximum MSDU size. Monitor interfaces send and receive
2294 * MPDU and A-MSDU frames which may be much larger so we do
2295 * not impose an upper limit in that case.
2296 */
2297 ndev->min_mtu = 256;
2298 if (type == NL80211_IFTYPE_MONITOR)
2299 ndev->max_mtu = 0;
2300 else
2301 ndev->max_mtu = local->hw.max_mtu;
2302
2303 ret = cfg80211_register_netdevice(ndev);
2304 if (ret) {
2305 free_netdev(ndev);
2306 return ret;
2307 }
2308 }
2309
2310 mutex_lock(&local->iflist_mtx);
2311 list_add_tail_rcu(&sdata->list, &local->interfaces);
2312 mutex_unlock(&local->iflist_mtx);
2313
2314 if (new_wdev)
2315 *new_wdev = &sdata->wdev;
2316
2317 return 0;
2318 }
2319
ieee80211_if_remove(struct ieee80211_sub_if_data * sdata)2320 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2321 {
2322 ASSERT_RTNL();
2323 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2324
2325 mutex_lock(&sdata->local->iflist_mtx);
2326 list_del_rcu(&sdata->list);
2327 mutex_unlock(&sdata->local->iflist_mtx);
2328
2329 if (sdata->vif.txq)
2330 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2331
2332 synchronize_rcu();
2333
2334 cfg80211_unregister_wdev(&sdata->wdev);
2335
2336 if (!sdata->dev) {
2337 ieee80211_teardown_sdata(sdata);
2338 kfree(sdata);
2339 }
2340 }
2341
ieee80211_sdata_stop(struct ieee80211_sub_if_data * sdata)2342 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2343 {
2344 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2345 return;
2346 ieee80211_do_stop(sdata, true);
2347 }
2348
ieee80211_remove_interfaces(struct ieee80211_local * local)2349 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2350 {
2351 struct ieee80211_sub_if_data *sdata, *tmp;
2352 LIST_HEAD(unreg_list);
2353
2354 ASSERT_RTNL();
2355
2356 /* Before destroying the interfaces, make sure they're all stopped so
2357 * that the hardware is stopped. Otherwise, the driver might still be
2358 * iterating the interfaces during the shutdown, e.g. from a worker
2359 * or from RX processing or similar, and if it does so (using atomic
2360 * iteration) while we're manipulating the list, the iteration will
2361 * crash.
2362 *
2363 * After this, the hardware should be stopped and the driver should
2364 * have stopped all of its activities, so that we can do RCU-unaware
2365 * manipulations of the interface list below.
2366 */
2367 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2368
2369 guard(wiphy)(local->hw.wiphy);
2370
2371 WARN(local->open_count, "%s: open count remains %d\n",
2372 wiphy_name(local->hw.wiphy), local->open_count);
2373
2374 mutex_lock(&local->iflist_mtx);
2375 list_splice_init(&local->interfaces, &unreg_list);
2376 mutex_unlock(&local->iflist_mtx);
2377
2378 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2379 bool netdev = sdata->dev;
2380
2381 /*
2382 * Remove IP addresses explicitly, since the notifier will
2383 * skip the callbacks if wdev->registered is false, since
2384 * we can't acquire the wiphy_lock() again there if already
2385 * inside this locked section.
2386 */
2387 sdata->vif.cfg.arp_addr_cnt = 0;
2388 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2389 sdata->u.mgd.associated)
2390 ieee80211_vif_cfg_change_notify(sdata,
2391 BSS_CHANGED_ARP_FILTER);
2392
2393 list_del(&sdata->list);
2394 cfg80211_unregister_wdev(&sdata->wdev);
2395
2396 if (!netdev)
2397 kfree(sdata);
2398 }
2399 }
2400
netdev_notify(struct notifier_block * nb,unsigned long state,void * ptr)2401 static int netdev_notify(struct notifier_block *nb,
2402 unsigned long state, void *ptr)
2403 {
2404 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2405 struct ieee80211_sub_if_data *sdata;
2406
2407 if (state != NETDEV_CHANGENAME)
2408 return NOTIFY_DONE;
2409
2410 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2411 return NOTIFY_DONE;
2412
2413 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2414 return NOTIFY_DONE;
2415
2416 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2417 memcpy(sdata->name, dev->name, IFNAMSIZ);
2418 ieee80211_debugfs_rename_netdev(sdata);
2419
2420 return NOTIFY_OK;
2421 }
2422
2423 static struct notifier_block mac80211_netdev_notifier = {
2424 .notifier_call = netdev_notify,
2425 };
2426
ieee80211_iface_init(void)2427 int ieee80211_iface_init(void)
2428 {
2429 return register_netdevice_notifier(&mac80211_netdev_notifier);
2430 }
2431
ieee80211_iface_exit(void)2432 void ieee80211_iface_exit(void)
2433 {
2434 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2435 }
2436
ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data * sdata)2437 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2438 {
2439 if (sdata->vif.type == NL80211_IFTYPE_AP)
2440 atomic_inc(&sdata->u.ap.num_mcast_sta);
2441 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2442 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2443 }
2444
ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data * sdata)2445 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2446 {
2447 if (sdata->vif.type == NL80211_IFTYPE_AP)
2448 atomic_dec(&sdata->u.ap.num_mcast_sta);
2449 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2450 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2451 }
2452
ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data * sdata)2453 void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
2454 {
2455 struct ieee80211_local *local = sdata->local;
2456
2457 if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
2458 return;
2459
2460 ieee80211_stop_vif_queues_norefcount(local, sdata,
2461 IEEE80211_QUEUE_STOP_REASON_CSA);
2462 }
2463
ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data * sdata)2464 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
2465 {
2466 struct ieee80211_local *local = sdata->local;
2467
2468 ieee80211_wake_vif_queues_norefcount(local, sdata,
2469 IEEE80211_QUEUE_STOP_REASON_CSA);
2470 }
2471