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15#include <linux/slab.h>
16#include <linux/kernel.h>
17#include <linux/if_arp.h>
18#include <linux/netdevice.h>
19#include <linux/rtnetlink.h>
20#include <net/mac80211.h>
21#include <net/ieee80211_radiotap.h>
22#include "ieee80211_i.h"
23#include "sta_info.h"
24#include "debugfs_netdev.h"
25#include "mesh.h"
26#include "led.h"
27#include "driver-ops.h"
28#include "wme.h"
29#include "rate.h"
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47static void ieee80211_iface_work(struct work_struct *work);
48
49bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50{
51 struct ieee80211_chanctx_conf *chanctx_conf;
52 int power;
53
54 rcu_read_lock();
55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
56 if (!chanctx_conf) {
57 rcu_read_unlock();
58 return false;
59 }
60
61 power = ieee80211_chandef_max_power(&chanctx_conf->def);
62 rcu_read_unlock();
63
64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->user_power_level);
66
67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
68 power = min(power, sdata->ap_power_level);
69
70 if (power != sdata->vif.bss_conf.txpower) {
71 sdata->vif.bss_conf.txpower = power;
72 ieee80211_hw_config(sdata->local, 0);
73 return true;
74 }
75
76 return false;
77}
78
79void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
80 bool update_bss)
81{
82 if (__ieee80211_recalc_txpower(sdata) ||
83 (update_bss && ieee80211_sdata_running(sdata)))
84 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
85}
86
87static u32 __ieee80211_idle_off(struct ieee80211_local *local)
88{
89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
90 return 0;
91
92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
93 return IEEE80211_CONF_CHANGE_IDLE;
94}
95
96static u32 __ieee80211_idle_on(struct ieee80211_local *local)
97{
98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
99 return 0;
100
101 ieee80211_flush_queues(local, NULL, false);
102
103 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
104 return IEEE80211_CONF_CHANGE_IDLE;
105}
106
107static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
108 bool force_active)
109{
110 bool working, scanning, active;
111 unsigned int led_trig_start = 0, led_trig_stop = 0;
112
113 lockdep_assert_held(&local->mtx);
114
115 active = force_active ||
116 !list_empty(&local->chanctx_list) ||
117 local->monitors;
118
119 working = !local->ops->remain_on_channel &&
120 !list_empty(&local->roc_list);
121
122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124
125 if (working || scanning)
126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 else
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
129
130 if (active)
131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 else
133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134
135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136
137 if (working || scanning || active)
138 return __ieee80211_idle_off(local);
139 return __ieee80211_idle_on(local);
140}
141
142u32 ieee80211_idle_off(struct ieee80211_local *local)
143{
144 return __ieee80211_recalc_idle(local, true);
145}
146
147void ieee80211_recalc_idle(struct ieee80211_local *local)
148{
149 u32 change = __ieee80211_recalc_idle(local, false);
150 if (change)
151 ieee80211_hw_config(local, change);
152}
153
154static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
155 bool check_dup)
156{
157 struct ieee80211_local *local = sdata->local;
158 struct ieee80211_sub_if_data *iter;
159 u64 new, mask, tmp;
160 u8 *m;
161 int ret = 0;
162
163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
164 return 0;
165
166 m = addr;
167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171 m = local->hw.wiphy->addr_mask;
172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
176 if (!check_dup)
177 return ret;
178
179 mutex_lock(&local->iflist_mtx);
180 list_for_each_entry(iter, &local->interfaces, list) {
181 if (iter == sdata)
182 continue;
183
184 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
186 continue;
187
188 m = iter->vif.addr;
189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192
193 if ((new & ~mask) != (tmp & ~mask)) {
194 ret = -EINVAL;
195 break;
196 }
197 }
198 mutex_unlock(&local->iflist_mtx);
199
200 return ret;
201}
202
203static int ieee80211_change_mac(struct net_device *dev, void *addr)
204{
205 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
206 struct sockaddr *sa = addr;
207 bool check_dup = true;
208 int ret;
209
210 if (ieee80211_sdata_running(sdata))
211 return -EBUSY;
212
213 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
214 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
215 check_dup = false;
216
217 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
218 if (ret)
219 return ret;
220
221 ret = eth_mac_addr(dev, sa);
222
223 if (ret == 0)
224 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
225
226 return ret;
227}
228
229static inline int identical_mac_addr_allowed(int type1, int type2)
230{
231 return type1 == NL80211_IFTYPE_MONITOR ||
232 type2 == NL80211_IFTYPE_MONITOR ||
233 type1 == NL80211_IFTYPE_P2P_DEVICE ||
234 type2 == NL80211_IFTYPE_P2P_DEVICE ||
235 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
236 (type1 == NL80211_IFTYPE_WDS &&
237 (type2 == NL80211_IFTYPE_WDS ||
238 type2 == NL80211_IFTYPE_AP)) ||
239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
240 (type1 == NL80211_IFTYPE_AP_VLAN &&
241 (type2 == NL80211_IFTYPE_AP ||
242 type2 == NL80211_IFTYPE_AP_VLAN));
243}
244
245static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
246 enum nl80211_iftype iftype)
247{
248 struct ieee80211_local *local = sdata->local;
249 struct ieee80211_sub_if_data *nsdata;
250 int ret;
251
252 ASSERT_RTNL();
253
254
255 list_for_each_entry(nsdata, &local->interfaces, list) {
256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
257
258
259
260 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
261 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
262 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
263 nsdata->vif.type == NL80211_IFTYPE_OCB))
264 return -EBUSY;
265
266
267
268
269
270
271
272
273
274
275
276 if (iftype == NL80211_IFTYPE_ADHOC &&
277 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 return -EBUSY;
279
280
281
282
283 if (nsdata->vif.csa_active)
284 return -EBUSY;
285
286
287
288
289
290 if (!ether_addr_equal(sdata->vif.addr,
291 nsdata->vif.addr))
292 continue;
293
294
295
296
297 if (!identical_mac_addr_allowed(iftype,
298 nsdata->vif.type))
299 return -ENOTUNIQ;
300
301
302
303
304 if (iftype == NL80211_IFTYPE_AP_VLAN &&
305 nsdata->vif.type == NL80211_IFTYPE_AP)
306 sdata->bss = &nsdata->u.ap;
307 }
308 }
309
310 mutex_lock(&local->chanctx_mtx);
311 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
312 mutex_unlock(&local->chanctx_mtx);
313 return ret;
314}
315
316static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
317 enum nl80211_iftype iftype)
318{
319 int n_queues = sdata->local->hw.queues;
320 int i;
321
322 if (iftype == NL80211_IFTYPE_NAN)
323 return 0;
324
325 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
326 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
327 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
328 IEEE80211_INVAL_HW_QUEUE))
329 return -EINVAL;
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
331 n_queues))
332 return -EINVAL;
333 }
334 }
335
336 if ((iftype != NL80211_IFTYPE_AP &&
337 iftype != NL80211_IFTYPE_P2P_GO &&
338 iftype != NL80211_IFTYPE_MESH_POINT) ||
339 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
341 return 0;
342 }
343
344 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
345 return -EINVAL;
346
347 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
348 return -EINVAL;
349
350 return 0;
351}
352
353void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
354 const int offset)
355{
356 struct ieee80211_local *local = sdata->local;
357 u32 flags = sdata->u.mntr.flags;
358
359#define ADJUST(_f, _s) do { \
360 if (flags & MONITOR_FLAG_##_f) \
361 local->fif_##_s += offset; \
362 } while (0)
363
364 ADJUST(FCSFAIL, fcsfail);
365 ADJUST(PLCPFAIL, plcpfail);
366 ADJUST(CONTROL, control);
367 ADJUST(CONTROL, pspoll);
368 ADJUST(OTHER_BSS, other_bss);
369
370#undef ADJUST
371}
372
373static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
374{
375 struct ieee80211_local *local = sdata->local;
376 int i;
377
378 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
379 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
380 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
381 else if (local->hw.queues >= IEEE80211_NUM_ACS)
382 sdata->vif.hw_queue[i] = i;
383 else
384 sdata->vif.hw_queue[i] = 0;
385 }
386 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
387}
388
389int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
390{
391 struct ieee80211_sub_if_data *sdata;
392 int ret;
393
394 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
395 return 0;
396
397 ASSERT_RTNL();
398
399 if (local->monitor_sdata)
400 return 0;
401
402 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
403 if (!sdata)
404 return -ENOMEM;
405
406
407 sdata->local = local;
408 sdata->vif.type = NL80211_IFTYPE_MONITOR;
409 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
410 wiphy_name(local->hw.wiphy));
411 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
412
413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
414
415 ieee80211_set_default_queues(sdata);
416
417 ret = drv_add_interface(local, sdata);
418 if (WARN_ON(ret)) {
419
420 kfree(sdata);
421 return ret;
422 }
423
424 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
425 if (ret) {
426 kfree(sdata);
427 return ret;
428 }
429
430 mutex_lock(&local->iflist_mtx);
431 rcu_assign_pointer(local->monitor_sdata, sdata);
432 mutex_unlock(&local->iflist_mtx);
433
434 mutex_lock(&local->mtx);
435 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
436 IEEE80211_CHANCTX_EXCLUSIVE);
437 mutex_unlock(&local->mtx);
438 if (ret) {
439 mutex_lock(&local->iflist_mtx);
440 RCU_INIT_POINTER(local->monitor_sdata, NULL);
441 mutex_unlock(&local->iflist_mtx);
442 synchronize_net();
443 drv_remove_interface(local, sdata);
444 kfree(sdata);
445 return ret;
446 }
447
448 skb_queue_head_init(&sdata->skb_queue);
449 INIT_WORK(&sdata->work, ieee80211_iface_work);
450
451 return 0;
452}
453
454void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
455{
456 struct ieee80211_sub_if_data *sdata;
457
458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
459 return;
460
461 ASSERT_RTNL();
462
463 mutex_lock(&local->iflist_mtx);
464
465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
467 if (!sdata) {
468 mutex_unlock(&local->iflist_mtx);
469 return;
470 }
471
472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
473 mutex_unlock(&local->iflist_mtx);
474
475 synchronize_net();
476
477 mutex_lock(&local->mtx);
478 ieee80211_vif_release_channel(sdata);
479 mutex_unlock(&local->mtx);
480
481 drv_remove_interface(local, sdata);
482
483 kfree(sdata);
484}
485
486
487
488
489
490
491int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
492{
493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
497 u32 changed = 0;
498 int res;
499 u32 hw_reconf_flags = 0;
500
501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
504 return -ENOLINK;
505 break;
506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
508
509 if (!sdata->bss)
510 return -ENOLINK;
511
512 mutex_lock(&local->mtx);
513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
514 mutex_unlock(&local->mtx);
515
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
522 sdata->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
526
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
531
532 break;
533 }
534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
536 break;
537 case NL80211_IFTYPE_MESH_POINT:
538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
541 case NL80211_IFTYPE_P2P_DEVICE:
542 case NL80211_IFTYPE_OCB:
543 case NL80211_IFTYPE_NAN:
544
545 break;
546 case NL80211_IFTYPE_UNSPECIFIED:
547 case NUM_NL80211_IFTYPES:
548 case NL80211_IFTYPE_P2P_CLIENT:
549 case NL80211_IFTYPE_P2P_GO:
550
551 WARN_ON(1);
552 break;
553 }
554
555 if (local->open_count == 0) {
556 res = drv_start(local);
557 if (res)
558 goto err_del_bss;
559
560 hw_reconf_flags = ~0;
561 ieee80211_led_radio(local, true);
562 ieee80211_mod_tpt_led_trig(local,
563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
564 }
565
566
567
568
569
570 if (dev && is_zero_ether_addr(dev->dev_addr)) {
571 memcpy(dev->dev_addr,
572 local->hw.wiphy->perm_addr,
573 ETH_ALEN);
574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
575
576 if (!is_valid_ether_addr(dev->dev_addr)) {
577 res = -EADDRNOTAVAIL;
578 goto err_stop;
579 }
580 }
581
582 switch (sdata->vif.type) {
583 case NL80211_IFTYPE_AP_VLAN:
584
585 if (rtnl_dereference(sdata->bss->beacon)) {
586 ieee80211_vif_vlan_copy_chanctx(sdata);
587 netif_carrier_on(dev);
588 } else {
589 netif_carrier_off(dev);
590 }
591 break;
592 case NL80211_IFTYPE_MONITOR:
593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
594 local->cooked_mntrs++;
595 break;
596 }
597
598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
599 res = drv_add_interface(local, sdata);
600 if (res)
601 goto err_stop;
602 } else if (local->monitors == 0 && local->open_count == 0) {
603 res = ieee80211_add_virtual_monitor(local);
604 if (res)
605 goto err_stop;
606 }
607
608
609 local->monitors++;
610 if (local->monitors == 1) {
611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
613 }
614
615 ieee80211_adjust_monitor_flags(sdata, 1);
616 ieee80211_configure_filter(local);
617 mutex_lock(&local->mtx);
618 ieee80211_recalc_idle(local);
619 mutex_unlock(&local->mtx);
620
621 netif_carrier_on(dev);
622 break;
623 default:
624 if (coming_up) {
625 ieee80211_del_virtual_monitor(local);
626
627 res = drv_add_interface(local, sdata);
628 if (res)
629 goto err_stop;
630 res = ieee80211_check_queues(sdata,
631 ieee80211_vif_type_p2p(&sdata->vif));
632 if (res)
633 goto err_del_interface;
634 }
635
636 if (sdata->vif.type == NL80211_IFTYPE_AP) {
637 local->fif_pspoll++;
638 local->fif_probe_req++;
639
640 ieee80211_configure_filter(local);
641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
642 local->fif_probe_req++;
643 }
644
645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
646 sdata->vif.type != NL80211_IFTYPE_NAN)
647 changed |= ieee80211_reset_erp_info(sdata);
648 ieee80211_bss_info_change_notify(sdata, changed);
649
650 switch (sdata->vif.type) {
651 case NL80211_IFTYPE_STATION:
652 case NL80211_IFTYPE_ADHOC:
653 case NL80211_IFTYPE_AP:
654 case NL80211_IFTYPE_MESH_POINT:
655 case NL80211_IFTYPE_OCB:
656 netif_carrier_off(dev);
657 break;
658 case NL80211_IFTYPE_WDS:
659 case NL80211_IFTYPE_P2P_DEVICE:
660 case NL80211_IFTYPE_NAN:
661 break;
662 default:
663
664 WARN_ON(1);
665 }
666
667
668
669
670
671
672
673 ieee80211_set_wmm_default(sdata, true,
674 sdata->vif.type != NL80211_IFTYPE_STATION);
675 }
676
677 set_bit(SDATA_STATE_RUNNING, &sdata->state);
678
679 switch (sdata->vif.type) {
680 case NL80211_IFTYPE_WDS:
681
682 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
683 GFP_KERNEL);
684 if (!sta) {
685 res = -ENOMEM;
686 goto err_del_interface;
687 }
688
689 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
690 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
692
693 res = sta_info_insert(sta);
694 if (res) {
695
696 goto err_del_interface;
697 }
698
699 rate_control_rate_init(sta);
700 netif_carrier_on(dev);
701 break;
702 case NL80211_IFTYPE_P2P_DEVICE:
703 rcu_assign_pointer(local->p2p_sdata, sdata);
704 break;
705 case NL80211_IFTYPE_MONITOR:
706 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
707 break;
708 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
709 break;
710 default:
711 break;
712 }
713
714
715
716
717
718
719 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
720 atomic_inc(&local->iff_allmultis);
721
722 if (coming_up)
723 local->open_count++;
724
725 if (hw_reconf_flags)
726 ieee80211_hw_config(local, hw_reconf_flags);
727
728 ieee80211_recalc_ps(local);
729
730 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
731 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
732 local->ops->wake_tx_queue) {
733
734 if (dev)
735 netif_tx_start_all_queues(dev);
736 } else if (dev) {
737 unsigned long flags;
738 int n_acs = IEEE80211_NUM_ACS;
739 int ac;
740
741 if (local->hw.queues < IEEE80211_NUM_ACS)
742 n_acs = 1;
743
744 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
745 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
746 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
747 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
748 for (ac = 0; ac < n_acs; ac++) {
749 int ac_queue = sdata->vif.hw_queue[ac];
750
751 if (local->queue_stop_reasons[ac_queue] == 0 &&
752 skb_queue_empty(&local->pending[ac_queue]))
753 netif_start_subqueue(dev, ac);
754 }
755 }
756 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
757 }
758
759 return 0;
760 err_del_interface:
761 drv_remove_interface(local, sdata);
762 err_stop:
763 if (!local->open_count)
764 drv_stop(local);
765 err_del_bss:
766 sdata->bss = NULL;
767 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
768 mutex_lock(&local->mtx);
769 list_del(&sdata->u.vlan.list);
770 mutex_unlock(&local->mtx);
771 }
772
773 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
774 return res;
775}
776
777static int ieee80211_open(struct net_device *dev)
778{
779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
780 int err;
781
782
783 if (!is_valid_ether_addr(dev->dev_addr))
784 return -EADDRNOTAVAIL;
785
786 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
787 if (err)
788 return err;
789
790 return ieee80211_do_open(&sdata->wdev, true);
791}
792
793static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
794 bool going_down)
795{
796 struct ieee80211_local *local = sdata->local;
797 unsigned long flags;
798 struct sk_buff *skb, *tmp;
799 u32 hw_reconf_flags = 0;
800 int i, flushed;
801 struct ps_data *ps;
802 struct cfg80211_chan_def chandef;
803 bool cancel_scan;
804 struct cfg80211_nan_func *func;
805
806 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
807
808 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
809 if (cancel_scan)
810 ieee80211_scan_cancel(local);
811
812
813
814
815 if (sdata->dev)
816 netif_tx_stop_all_queues(sdata->dev);
817
818 ieee80211_roc_purge(local, sdata);
819
820 switch (sdata->vif.type) {
821 case NL80211_IFTYPE_STATION:
822 ieee80211_mgd_stop(sdata);
823 break;
824 case NL80211_IFTYPE_ADHOC:
825 ieee80211_ibss_stop(sdata);
826 break;
827 case NL80211_IFTYPE_AP:
828 cancel_work_sync(&sdata->u.ap.request_smps_work);
829 break;
830 case NL80211_IFTYPE_MONITOR:
831 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
832 break;
833 list_del_rcu(&sdata->u.mntr.list);
834 break;
835 default:
836 break;
837 }
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854 flushed = sta_info_flush(sdata);
855 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
856 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
857 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
858
859
860 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
861 atomic_dec(&local->iff_allmultis);
862
863 if (sdata->vif.type == NL80211_IFTYPE_AP) {
864 local->fif_pspoll--;
865 local->fif_probe_req--;
866 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
867 local->fif_probe_req--;
868 }
869
870 if (sdata->dev) {
871 netif_addr_lock_bh(sdata->dev);
872 spin_lock_bh(&local->filter_lock);
873 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
874 sdata->dev->addr_len);
875 spin_unlock_bh(&local->filter_lock);
876 netif_addr_unlock_bh(sdata->dev);
877 }
878
879 del_timer_sync(&local->dynamic_ps_timer);
880 cancel_work_sync(&local->dynamic_ps_enable_work);
881
882 cancel_work_sync(&sdata->recalc_smps);
883 sdata_lock(sdata);
884 mutex_lock(&local->mtx);
885 sdata->vif.csa_active = false;
886 if (sdata->vif.type == NL80211_IFTYPE_STATION)
887 sdata->u.mgd.csa_waiting_bcn = false;
888 if (sdata->csa_block_tx) {
889 ieee80211_wake_vif_queues(local, sdata,
890 IEEE80211_QUEUE_STOP_REASON_CSA);
891 sdata->csa_block_tx = false;
892 }
893 mutex_unlock(&local->mtx);
894 sdata_unlock(sdata);
895
896 cancel_work_sync(&sdata->csa_finalize_work);
897
898 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
899
900 if (sdata->wdev.cac_started) {
901 chandef = sdata->vif.bss_conf.chandef;
902 WARN_ON(local->suspended);
903 mutex_lock(&local->mtx);
904 ieee80211_vif_release_channel(sdata);
905 mutex_unlock(&local->mtx);
906 cfg80211_cac_event(sdata->dev, &chandef,
907 NL80211_RADAR_CAC_ABORTED,
908 GFP_KERNEL);
909 }
910
911
912 if (sdata->vif.type == NL80211_IFTYPE_AP) {
913 struct ieee80211_sub_if_data *vlan, *tmpsdata;
914
915
916 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
917 u.vlan.list)
918 dev_close(vlan->dev);
919 WARN_ON(!list_empty(&sdata->u.ap.vlans));
920 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
921
922 ps = &sdata->bss->ps;
923
924 spin_lock_irqsave(&ps->bc_buf.lock, flags);
925 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
926 if (skb->dev == sdata->dev) {
927 __skb_unlink(skb, &ps->bc_buf);
928 local->total_ps_buffered--;
929 ieee80211_free_txskb(&local->hw, skb);
930 }
931 }
932 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
933 }
934
935 if (going_down)
936 local->open_count--;
937
938 switch (sdata->vif.type) {
939 case NL80211_IFTYPE_AP_VLAN:
940 mutex_lock(&local->mtx);
941 list_del(&sdata->u.vlan.list);
942 mutex_unlock(&local->mtx);
943 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
944
945 ieee80211_free_keys(sdata, true);
946
947 break;
948 case NL80211_IFTYPE_MONITOR:
949 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
950 local->cooked_mntrs--;
951 break;
952 }
953
954 local->monitors--;
955 if (local->monitors == 0) {
956 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
957 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
958 }
959
960 ieee80211_adjust_monitor_flags(sdata, -1);
961 break;
962 case NL80211_IFTYPE_NAN:
963
964 spin_lock_bh(&sdata->u.nan.func_lock);
965
966 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
967 idr_remove(&sdata->u.nan.function_inst_ids, i);
968 cfg80211_free_nan_func(func);
969 }
970 idr_destroy(&sdata->u.nan.function_inst_ids);
971
972 spin_unlock_bh(&sdata->u.nan.func_lock);
973 break;
974 case NL80211_IFTYPE_P2P_DEVICE:
975
976 RCU_INIT_POINTER(local->p2p_sdata, NULL);
977
978 default:
979 cancel_work_sync(&sdata->work);
980
981
982
983
984
985
986
987
988
989
990
991
992 ieee80211_free_keys(sdata, true);
993 skb_queue_purge(&sdata->skb_queue);
994 }
995
996 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
997 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
998 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
999 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1000 if (info->control.vif == &sdata->vif) {
1001 __skb_unlink(skb, &local->pending[i]);
1002 ieee80211_free_txskb(&local->hw, skb);
1003 }
1004 }
1005 }
1006 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1007
1008 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1009 ieee80211_txq_remove_vlan(local, sdata);
1010
1011 sdata->bss = NULL;
1012
1013 if (local->open_count == 0)
1014 ieee80211_clear_tx_pending(local);
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025 if (local->suspended) {
1026 WARN_ON(local->wowlan);
1027 WARN_ON(rtnl_dereference(local->monitor_sdata));
1028 return;
1029 }
1030
1031 switch (sdata->vif.type) {
1032 case NL80211_IFTYPE_AP_VLAN:
1033 break;
1034 case NL80211_IFTYPE_MONITOR:
1035 if (local->monitors == 0)
1036 ieee80211_del_virtual_monitor(local);
1037
1038 mutex_lock(&local->mtx);
1039 ieee80211_recalc_idle(local);
1040 mutex_unlock(&local->mtx);
1041
1042 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1043 break;
1044
1045
1046 default:
1047 if (going_down)
1048 drv_remove_interface(local, sdata);
1049 }
1050
1051 ieee80211_recalc_ps(local);
1052
1053 if (cancel_scan)
1054 flush_delayed_work(&local->scan_work);
1055
1056 if (local->open_count == 0) {
1057 ieee80211_stop_device(local);
1058
1059
1060 return;
1061 }
1062
1063
1064 ieee80211_configure_filter(local);
1065 ieee80211_hw_config(local, hw_reconf_flags);
1066
1067 if (local->monitors == local->open_count)
1068 ieee80211_add_virtual_monitor(local);
1069}
1070
1071static int ieee80211_stop(struct net_device *dev)
1072{
1073 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1074
1075 ieee80211_do_stop(sdata, true);
1076
1077 return 0;
1078}
1079
1080static void ieee80211_set_multicast_list(struct net_device *dev)
1081{
1082 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1083 struct ieee80211_local *local = sdata->local;
1084 int allmulti, sdata_allmulti;
1085
1086 allmulti = !!(dev->flags & IFF_ALLMULTI);
1087 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1088
1089 if (allmulti != sdata_allmulti) {
1090 if (dev->flags & IFF_ALLMULTI)
1091 atomic_inc(&local->iff_allmultis);
1092 else
1093 atomic_dec(&local->iff_allmultis);
1094 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1095 }
1096
1097 spin_lock_bh(&local->filter_lock);
1098 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1099 spin_unlock_bh(&local->filter_lock);
1100 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1101}
1102
1103
1104
1105
1106
1107static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1108{
1109 int i;
1110
1111
1112 ieee80211_free_keys(sdata, false);
1113
1114 ieee80211_debugfs_remove_netdev(sdata);
1115
1116 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1117 __skb_queue_purge(&sdata->fragments[i].skb_list);
1118 sdata->fragment_next = 0;
1119
1120 if (ieee80211_vif_is_mesh(&sdata->vif))
1121 ieee80211_mesh_teardown_sdata(sdata);
1122}
1123
1124static void ieee80211_uninit(struct net_device *dev)
1125{
1126 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1127}
1128
1129static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1130 struct sk_buff *skb,
1131 void *accel_priv,
1132 select_queue_fallback_t fallback)
1133{
1134 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1135}
1136
1137static void
1138ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1139{
1140 int i;
1141
1142 for_each_possible_cpu(i) {
1143 const struct pcpu_sw_netstats *tstats;
1144 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1145 unsigned int start;
1146
1147 tstats = per_cpu_ptr(dev->tstats, i);
1148
1149 do {
1150 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1151 rx_packets = tstats->rx_packets;
1152 tx_packets = tstats->tx_packets;
1153 rx_bytes = tstats->rx_bytes;
1154 tx_bytes = tstats->tx_bytes;
1155 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1156
1157 stats->rx_packets += rx_packets;
1158 stats->tx_packets += tx_packets;
1159 stats->rx_bytes += rx_bytes;
1160 stats->tx_bytes += tx_bytes;
1161 }
1162}
1163
1164static const struct net_device_ops ieee80211_dataif_ops = {
1165 .ndo_open = ieee80211_open,
1166 .ndo_stop = ieee80211_stop,
1167 .ndo_uninit = ieee80211_uninit,
1168 .ndo_start_xmit = ieee80211_subif_start_xmit,
1169 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1170 .ndo_set_mac_address = ieee80211_change_mac,
1171 .ndo_select_queue = ieee80211_netdev_select_queue,
1172 .ndo_get_stats64 = ieee80211_get_stats64,
1173};
1174
1175static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1176 struct sk_buff *skb,
1177 void *accel_priv,
1178 select_queue_fallback_t fallback)
1179{
1180 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1181 struct ieee80211_local *local = sdata->local;
1182 struct ieee80211_hdr *hdr;
1183 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1184
1185 if (local->hw.queues < IEEE80211_NUM_ACS)
1186 return 0;
1187
1188 if (skb->len < 4 ||
1189 skb->len < le16_to_cpu(rtap->it_len) + 2 )
1190 return 0;
1191
1192 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1193
1194 return ieee80211_select_queue_80211(sdata, skb, hdr);
1195}
1196
1197static const struct net_device_ops ieee80211_monitorif_ops = {
1198 .ndo_open = ieee80211_open,
1199 .ndo_stop = ieee80211_stop,
1200 .ndo_uninit = ieee80211_uninit,
1201 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1202 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1203 .ndo_set_mac_address = ieee80211_change_mac,
1204 .ndo_select_queue = ieee80211_monitor_select_queue,
1205 .ndo_get_stats64 = ieee80211_get_stats64,
1206};
1207
1208static void ieee80211_if_free(struct net_device *dev)
1209{
1210 free_percpu(dev->tstats);
1211}
1212
1213static void ieee80211_if_setup(struct net_device *dev)
1214{
1215 ether_setup(dev);
1216 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1217 dev->netdev_ops = &ieee80211_dataif_ops;
1218 dev->needs_free_netdev = true;
1219 dev->priv_destructor = ieee80211_if_free;
1220}
1221
1222static void ieee80211_if_setup_no_queue(struct net_device *dev)
1223{
1224 ieee80211_if_setup(dev);
1225 dev->priv_flags |= IFF_NO_QUEUE;
1226}
1227
1228static void ieee80211_iface_work(struct work_struct *work)
1229{
1230 struct ieee80211_sub_if_data *sdata =
1231 container_of(work, struct ieee80211_sub_if_data, work);
1232 struct ieee80211_local *local = sdata->local;
1233 struct sk_buff *skb;
1234 struct sta_info *sta;
1235
1236 if (!ieee80211_sdata_running(sdata))
1237 return;
1238
1239 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1240 return;
1241
1242 if (!ieee80211_can_run_worker(local))
1243 return;
1244
1245
1246 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1247 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1248
1249 if (ieee80211_is_action(mgmt->frame_control) &&
1250 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1251 int len = skb->len;
1252
1253 mutex_lock(&local->sta_mtx);
1254 sta = sta_info_get_bss(sdata, mgmt->sa);
1255 if (sta) {
1256 switch (mgmt->u.action.u.addba_req.action_code) {
1257 case WLAN_ACTION_ADDBA_REQ:
1258 ieee80211_process_addba_request(
1259 local, sta, mgmt, len);
1260 break;
1261 case WLAN_ACTION_ADDBA_RESP:
1262 ieee80211_process_addba_resp(local, sta,
1263 mgmt, len);
1264 break;
1265 case WLAN_ACTION_DELBA:
1266 ieee80211_process_delba(sdata, sta,
1267 mgmt, len);
1268 break;
1269 default:
1270 WARN_ON(1);
1271 break;
1272 }
1273 }
1274 mutex_unlock(&local->sta_mtx);
1275 } else if (ieee80211_is_action(mgmt->frame_control) &&
1276 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1277 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1278 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1279 struct ieee80211_rx_status *status;
1280 enum nl80211_band band;
1281 u8 opmode;
1282
1283 status = IEEE80211_SKB_RXCB(skb);
1284 band = status->band;
1285 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1286
1287 mutex_lock(&local->sta_mtx);
1288 sta = sta_info_get_bss(sdata, mgmt->sa);
1289
1290 if (sta)
1291 ieee80211_vht_handle_opmode(sdata, sta,
1292 opmode,
1293 band);
1294
1295 mutex_unlock(&local->sta_mtx);
1296 break;
1297 }
1298 case WLAN_VHT_ACTION_GROUPID_MGMT:
1299 ieee80211_process_mu_groups(sdata, mgmt);
1300 break;
1301 default:
1302 WARN_ON(1);
1303 break;
1304 }
1305 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1306 struct ieee80211_hdr *hdr = (void *)mgmt;
1307
1308
1309
1310
1311
1312
1313
1314
1315 WARN_ON(hdr->frame_control &
1316 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1317 WARN_ON(!(hdr->seq_ctrl &
1318 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1319
1320
1321
1322
1323
1324 mutex_lock(&local->sta_mtx);
1325 sta = sta_info_get_bss(sdata, mgmt->sa);
1326 if (sta) {
1327 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1328 IEEE80211_QOS_CTL_TID_MASK;
1329
1330 __ieee80211_stop_rx_ba_session(
1331 sta, tid, WLAN_BACK_RECIPIENT,
1332 WLAN_REASON_QSTA_REQUIRE_SETUP,
1333 true);
1334 }
1335 mutex_unlock(&local->sta_mtx);
1336 } else switch (sdata->vif.type) {
1337 case NL80211_IFTYPE_STATION:
1338 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1339 break;
1340 case NL80211_IFTYPE_ADHOC:
1341 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1342 break;
1343 case NL80211_IFTYPE_MESH_POINT:
1344 if (!ieee80211_vif_is_mesh(&sdata->vif))
1345 break;
1346 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1347 break;
1348 default:
1349 WARN(1, "frame for unexpected interface type");
1350 break;
1351 }
1352
1353 kfree_skb(skb);
1354 }
1355
1356
1357 switch (sdata->vif.type) {
1358 case NL80211_IFTYPE_STATION:
1359 ieee80211_sta_work(sdata);
1360 break;
1361 case NL80211_IFTYPE_ADHOC:
1362 ieee80211_ibss_work(sdata);
1363 break;
1364 case NL80211_IFTYPE_MESH_POINT:
1365 if (!ieee80211_vif_is_mesh(&sdata->vif))
1366 break;
1367 ieee80211_mesh_work(sdata);
1368 break;
1369 case NL80211_IFTYPE_OCB:
1370 ieee80211_ocb_work(sdata);
1371 break;
1372 default:
1373 break;
1374 }
1375}
1376
1377static void ieee80211_recalc_smps_work(struct work_struct *work)
1378{
1379 struct ieee80211_sub_if_data *sdata =
1380 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1381
1382 ieee80211_recalc_smps(sdata);
1383}
1384
1385
1386
1387
1388static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1389 enum nl80211_iftype type)
1390{
1391 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1392 0xff, 0xff, 0xff};
1393
1394
1395 memset(&sdata->u, 0, sizeof(sdata->u));
1396
1397
1398 sdata->vif.type = type;
1399 sdata->vif.p2p = false;
1400 sdata->wdev.iftype = type;
1401
1402 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1403 sdata->control_port_no_encrypt = false;
1404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1405 sdata->vif.bss_conf.idle = true;
1406
1407 sdata->noack_map = 0;
1408
1409
1410 if (sdata->dev) {
1411 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1412 sdata->dev->type = ARPHRD_ETHER;
1413 }
1414
1415 skb_queue_head_init(&sdata->skb_queue);
1416 INIT_WORK(&sdata->work, ieee80211_iface_work);
1417 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1418 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1419 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1420 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1421
1422 switch (type) {
1423 case NL80211_IFTYPE_P2P_GO:
1424 type = NL80211_IFTYPE_AP;
1425 sdata->vif.type = type;
1426 sdata->vif.p2p = true;
1427
1428 case NL80211_IFTYPE_AP:
1429 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1430 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1431 INIT_WORK(&sdata->u.ap.request_smps_work,
1432 ieee80211_request_smps_ap_work);
1433 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1434 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1435 break;
1436 case NL80211_IFTYPE_P2P_CLIENT:
1437 type = NL80211_IFTYPE_STATION;
1438 sdata->vif.type = type;
1439 sdata->vif.p2p = true;
1440
1441 case NL80211_IFTYPE_STATION:
1442 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1443 ieee80211_sta_setup_sdata(sdata);
1444 break;
1445 case NL80211_IFTYPE_OCB:
1446 sdata->vif.bss_conf.bssid = bssid_wildcard;
1447 ieee80211_ocb_setup_sdata(sdata);
1448 break;
1449 case NL80211_IFTYPE_ADHOC:
1450 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1451 ieee80211_ibss_setup_sdata(sdata);
1452 break;
1453 case NL80211_IFTYPE_MESH_POINT:
1454 if (ieee80211_vif_is_mesh(&sdata->vif))
1455 ieee80211_mesh_init_sdata(sdata);
1456 break;
1457 case NL80211_IFTYPE_MONITOR:
1458 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1459 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1460 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1461 MONITOR_FLAG_OTHER_BSS;
1462 break;
1463 case NL80211_IFTYPE_WDS:
1464 sdata->vif.bss_conf.bssid = NULL;
1465 break;
1466 case NL80211_IFTYPE_NAN:
1467 idr_init(&sdata->u.nan.function_inst_ids);
1468 spin_lock_init(&sdata->u.nan.func_lock);
1469 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1470 break;
1471 case NL80211_IFTYPE_AP_VLAN:
1472 case NL80211_IFTYPE_P2P_DEVICE:
1473 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1474 break;
1475 case NL80211_IFTYPE_UNSPECIFIED:
1476 case NUM_NL80211_IFTYPES:
1477 BUG();
1478 break;
1479 }
1480
1481 ieee80211_debugfs_add_netdev(sdata);
1482}
1483
1484static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1485 enum nl80211_iftype type)
1486{
1487 struct ieee80211_local *local = sdata->local;
1488 int ret, err;
1489 enum nl80211_iftype internal_type = type;
1490 bool p2p = false;
1491
1492 ASSERT_RTNL();
1493
1494 if (!local->ops->change_interface)
1495 return -EBUSY;
1496
1497 switch (sdata->vif.type) {
1498 case NL80211_IFTYPE_AP:
1499 case NL80211_IFTYPE_STATION:
1500 case NL80211_IFTYPE_ADHOC:
1501 case NL80211_IFTYPE_OCB:
1502
1503
1504
1505
1506
1507
1508 break;
1509 default:
1510 return -EBUSY;
1511 }
1512
1513 switch (type) {
1514 case NL80211_IFTYPE_AP:
1515 case NL80211_IFTYPE_STATION:
1516 case NL80211_IFTYPE_ADHOC:
1517 case NL80211_IFTYPE_OCB:
1518
1519
1520
1521
1522
1523
1524 break;
1525 case NL80211_IFTYPE_P2P_CLIENT:
1526 p2p = true;
1527 internal_type = NL80211_IFTYPE_STATION;
1528 break;
1529 case NL80211_IFTYPE_P2P_GO:
1530 p2p = true;
1531 internal_type = NL80211_IFTYPE_AP;
1532 break;
1533 default:
1534 return -EBUSY;
1535 }
1536
1537 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1538 if (ret)
1539 return ret;
1540
1541 ieee80211_do_stop(sdata, false);
1542
1543 ieee80211_teardown_sdata(sdata);
1544
1545 ret = drv_change_interface(local, sdata, internal_type, p2p);
1546 if (ret)
1547 type = ieee80211_vif_type_p2p(&sdata->vif);
1548
1549
1550
1551
1552
1553
1554 ieee80211_check_queues(sdata, type);
1555
1556 ieee80211_setup_sdata(sdata, type);
1557
1558 err = ieee80211_do_open(&sdata->wdev, false);
1559 WARN(err, "type change: do_open returned %d", err);
1560
1561 return ret;
1562}
1563
1564int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1565 enum nl80211_iftype type)
1566{
1567 int ret;
1568
1569 ASSERT_RTNL();
1570
1571 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1572 return 0;
1573
1574 if (ieee80211_sdata_running(sdata)) {
1575 ret = ieee80211_runtime_change_iftype(sdata, type);
1576 if (ret)
1577 return ret;
1578 } else {
1579
1580 ieee80211_teardown_sdata(sdata);
1581 ieee80211_setup_sdata(sdata, type);
1582 }
1583
1584
1585 if (type == NL80211_IFTYPE_STATION)
1586 sdata->u.mgd.use_4addr = false;
1587
1588 return 0;
1589}
1590
1591static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1592 u8 *perm_addr, enum nl80211_iftype type)
1593{
1594 struct ieee80211_sub_if_data *sdata;
1595 u64 mask, start, addr, val, inc;
1596 u8 *m;
1597 u8 tmp_addr[ETH_ALEN];
1598 int i;
1599
1600
1601 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1602
1603 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1604 local->hw.wiphy->n_addresses <= 1)
1605 return;
1606
1607 mutex_lock(&local->iflist_mtx);
1608
1609 switch (type) {
1610 case NL80211_IFTYPE_MONITOR:
1611
1612 break;
1613 case NL80211_IFTYPE_WDS:
1614 case NL80211_IFTYPE_AP_VLAN:
1615
1616 list_for_each_entry(sdata, &local->interfaces, list) {
1617 if (sdata->vif.type != NL80211_IFTYPE_AP)
1618 continue;
1619 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1620 break;
1621 }
1622
1623 break;
1624 case NL80211_IFTYPE_P2P_CLIENT:
1625 case NL80211_IFTYPE_P2P_GO:
1626 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1627 list_for_each_entry(sdata, &local->interfaces, list) {
1628 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1629 continue;
1630 if (!ieee80211_sdata_running(sdata))
1631 continue;
1632 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1633 goto out_unlock;
1634 }
1635 }
1636
1637 default:
1638
1639 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1640 bool used = false;
1641
1642 list_for_each_entry(sdata, &local->interfaces, list) {
1643 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1644 sdata->vif.addr)) {
1645 used = true;
1646 break;
1647 }
1648 }
1649
1650 if (!used) {
1651 memcpy(perm_addr,
1652 local->hw.wiphy->addresses[i].addr,
1653 ETH_ALEN);
1654 break;
1655 }
1656 }
1657
1658
1659 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1660 break;
1661
1662 m = local->hw.wiphy->addr_mask;
1663 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1664 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1665 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1666
1667 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1668
1669 pr_info("not contiguous\n");
1670 break;
1671 }
1672
1673
1674
1675
1676
1677 m = local->hw.wiphy->perm_addr;
1678 list_for_each_entry(sdata, &local->interfaces, list) {
1679 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1680 continue;
1681 m = sdata->vif.addr;
1682 break;
1683 }
1684 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1685 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1686 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1687
1688 inc = 1ULL<<__ffs64(mask);
1689 val = (start & mask);
1690 addr = (start & ~mask) | (val & mask);
1691 do {
1692 bool used = false;
1693
1694 tmp_addr[5] = addr >> 0*8;
1695 tmp_addr[4] = addr >> 1*8;
1696 tmp_addr[3] = addr >> 2*8;
1697 tmp_addr[2] = addr >> 3*8;
1698 tmp_addr[1] = addr >> 4*8;
1699 tmp_addr[0] = addr >> 5*8;
1700
1701 val += inc;
1702
1703 list_for_each_entry(sdata, &local->interfaces, list) {
1704 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1705 used = true;
1706 break;
1707 }
1708 }
1709
1710 if (!used) {
1711 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1712 break;
1713 }
1714 addr = (start & ~mask) | (val & mask);
1715 } while (addr != start);
1716
1717 break;
1718 }
1719
1720 out_unlock:
1721 mutex_unlock(&local->iflist_mtx);
1722}
1723
1724int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1725 unsigned char name_assign_type,
1726 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1727 struct vif_params *params)
1728{
1729 struct net_device *ndev = NULL;
1730 struct ieee80211_sub_if_data *sdata = NULL;
1731 struct txq_info *txqi;
1732 void (*if_setup)(struct net_device *dev);
1733 int ret, i;
1734 int txqs = 1;
1735
1736 ASSERT_RTNL();
1737
1738 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1739 struct wireless_dev *wdev;
1740
1741 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1742 GFP_KERNEL);
1743 if (!sdata)
1744 return -ENOMEM;
1745 wdev = &sdata->wdev;
1746
1747 sdata->dev = NULL;
1748 strlcpy(sdata->name, name, IFNAMSIZ);
1749 ieee80211_assign_perm_addr(local, wdev->address, type);
1750 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1751 } else {
1752 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1753 sizeof(void *));
1754 int txq_size = 0;
1755
1756 if (local->ops->wake_tx_queue &&
1757 type != NL80211_IFTYPE_AP_VLAN &&
1758 type != NL80211_IFTYPE_MONITOR)
1759 txq_size += sizeof(struct txq_info) +
1760 local->hw.txq_data_size;
1761
1762 if (local->ops->wake_tx_queue)
1763 if_setup = ieee80211_if_setup_no_queue;
1764 else
1765 if_setup = ieee80211_if_setup;
1766
1767 if (local->hw.queues >= IEEE80211_NUM_ACS)
1768 txqs = IEEE80211_NUM_ACS;
1769
1770 ndev = alloc_netdev_mqs(size + txq_size,
1771 name, name_assign_type,
1772 if_setup, txqs, 1);
1773 if (!ndev)
1774 return -ENOMEM;
1775 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1776
1777 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1778 if (!ndev->tstats) {
1779 free_netdev(ndev);
1780 return -ENOMEM;
1781 }
1782
1783 ndev->needed_headroom = local->tx_headroom +
1784 4*6
1785 + 2 + 2 + 2 + 2
1786 + 6
1787 + 8
1788 - ETH_HLEN
1789 + IEEE80211_ENCRYPT_HEADROOM;
1790 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1791
1792 ret = dev_alloc_name(ndev, ndev->name);
1793 if (ret < 0) {
1794 ieee80211_if_free(ndev);
1795 free_netdev(ndev);
1796 return ret;
1797 }
1798
1799 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1800 if (params && is_valid_ether_addr(params->macaddr))
1801 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1802 else
1803 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1804 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1805
1806
1807 sdata = netdev_priv(ndev);
1808 ndev->ieee80211_ptr = &sdata->wdev;
1809 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1810 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1811
1812 if (txq_size) {
1813 txqi = netdev_priv(ndev) + size;
1814 ieee80211_txq_init(sdata, NULL, txqi, 0);
1815 }
1816
1817 sdata->dev = ndev;
1818 }
1819
1820
1821 sdata->wdev.wiphy = local->hw.wiphy;
1822 sdata->local = local;
1823
1824 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1825 skb_queue_head_init(&sdata->fragments[i].skb_list);
1826
1827 INIT_LIST_HEAD(&sdata->key_list);
1828
1829 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1830 ieee80211_dfs_cac_timer_work);
1831 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1832 ieee80211_delayed_tailroom_dec);
1833
1834 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1835 struct ieee80211_supported_band *sband;
1836 sband = local->hw.wiphy->bands[i];
1837 sdata->rc_rateidx_mask[i] =
1838 sband ? (1 << sband->n_bitrates) - 1 : 0;
1839 if (sband) {
1840 __le16 cap;
1841 u16 *vht_rate_mask;
1842
1843 memcpy(sdata->rc_rateidx_mcs_mask[i],
1844 sband->ht_cap.mcs.rx_mask,
1845 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1846
1847 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1848 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1849 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1850 } else {
1851 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1852 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1853 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1854 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1855 }
1856 }
1857
1858 ieee80211_set_default_queues(sdata);
1859
1860 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1861 sdata->user_power_level = local->user_power_level;
1862
1863 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1864
1865
1866 ieee80211_setup_sdata(sdata, type);
1867
1868 if (ndev) {
1869 if (params) {
1870 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1871 if (type == NL80211_IFTYPE_STATION)
1872 sdata->u.mgd.use_4addr = params->use_4addr;
1873 }
1874
1875 ndev->features |= local->hw.netdev_features;
1876
1877 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1878
1879
1880 ndev->min_mtu = 256;
1881 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1882
1883 ret = register_netdevice(ndev);
1884 if (ret) {
1885 free_netdev(ndev);
1886 return ret;
1887 }
1888 }
1889
1890 mutex_lock(&local->iflist_mtx);
1891 list_add_tail_rcu(&sdata->list, &local->interfaces);
1892 mutex_unlock(&local->iflist_mtx);
1893
1894 if (new_wdev)
1895 *new_wdev = &sdata->wdev;
1896
1897 return 0;
1898}
1899
1900void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1901{
1902 ASSERT_RTNL();
1903
1904 mutex_lock(&sdata->local->iflist_mtx);
1905 list_del_rcu(&sdata->list);
1906 mutex_unlock(&sdata->local->iflist_mtx);
1907
1908 synchronize_rcu();
1909
1910 if (sdata->dev) {
1911 unregister_netdevice(sdata->dev);
1912 } else {
1913 cfg80211_unregister_wdev(&sdata->wdev);
1914 ieee80211_teardown_sdata(sdata);
1915 kfree(sdata);
1916 }
1917}
1918
1919void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1920{
1921 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1922 return;
1923 ieee80211_do_stop(sdata, true);
1924}
1925
1926void ieee80211_remove_interfaces(struct ieee80211_local *local)
1927{
1928 struct ieee80211_sub_if_data *sdata, *tmp;
1929 LIST_HEAD(unreg_list);
1930 LIST_HEAD(wdev_list);
1931
1932 ASSERT_RTNL();
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1946
1947 WARN(local->open_count, "%s: open count remains %d\n",
1948 wiphy_name(local->hw.wiphy), local->open_count);
1949
1950 mutex_lock(&local->iflist_mtx);
1951 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1952 list_del(&sdata->list);
1953
1954 if (sdata->dev)
1955 unregister_netdevice_queue(sdata->dev, &unreg_list);
1956 else
1957 list_add(&sdata->list, &wdev_list);
1958 }
1959 mutex_unlock(&local->iflist_mtx);
1960 unregister_netdevice_many(&unreg_list);
1961
1962 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1963 list_del(&sdata->list);
1964 cfg80211_unregister_wdev(&sdata->wdev);
1965 kfree(sdata);
1966 }
1967}
1968
1969static int netdev_notify(struct notifier_block *nb,
1970 unsigned long state, void *ptr)
1971{
1972 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1973 struct ieee80211_sub_if_data *sdata;
1974
1975 if (state != NETDEV_CHANGENAME)
1976 return NOTIFY_DONE;
1977
1978 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1979 return NOTIFY_DONE;
1980
1981 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1982 return NOTIFY_DONE;
1983
1984 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1985 memcpy(sdata->name, dev->name, IFNAMSIZ);
1986 ieee80211_debugfs_rename_netdev(sdata);
1987
1988 return NOTIFY_OK;
1989}
1990
1991static struct notifier_block mac80211_netdev_notifier = {
1992 .notifier_call = netdev_notify,
1993};
1994
1995int ieee80211_iface_init(void)
1996{
1997 return register_netdevice_notifier(&mac80211_netdev_notifier);
1998}
1999
2000void ieee80211_iface_exit(void)
2001{
2002 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2003}
2004
2005void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2006{
2007 if (sdata->vif.type == NL80211_IFTYPE_AP)
2008 atomic_inc(&sdata->u.ap.num_mcast_sta);
2009 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2010 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2011}
2012
2013void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2014{
2015 if (sdata->vif.type == NL80211_IFTYPE_AP)
2016 atomic_dec(&sdata->u.ap.num_mcast_sta);
2017 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2018 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2019}
2020