blob: 6ce13e976b7a2cd4c4f46a3b486c7c67601b85f1 [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +08001/*
2 * Interface handling
3 *
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (c) 2016 Intel Deutschland GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
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 * DOC: Interface list locking
33 *
34 * The interface list in each struct ieee80211_local is protected
35 * three-fold:
36 *
37 * (1) modifications may only be done under the RTNL
38 * (2) modifications and readers are protected against each other by
39 * the iflist_mtx.
40 * (3) modifications are done in an RCU manner so atomic readers
41 * can traverse the list in RCU-safe blocks.
42 *
43 * As a consequence, reads (traversals) of the list can be protected
44 * by either the RTNL, the iflist_mtx or RCU.
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 /* we hold the RTNL here so can safely walk the list */
255 list_for_each_entry(nsdata, &local->interfaces, list) {
256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
257 /*
258 * Only OCB and monitor mode may coexist
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 * Allow only a single IBSS interface to be up at any
268 * time. This is restricted because beacon distribution
269 * cannot work properly if both are in the same IBSS.
270 *
271 * To remove this restriction we'd have to disallow them
272 * from setting the same SSID on different IBSS interfaces
273 * belonging to the same hardware. Then, however, we're
274 * faced with having to adopt two different TSF timers...
275 */
276 if (iftype == NL80211_IFTYPE_ADHOC &&
277 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 return -EBUSY;
279 /*
280 * will not add another interface while any channel
281 * switch is active.
282 */
283 if (nsdata->vif.csa_active)
284 return -EBUSY;
285
286 /*
287 * The remaining checks are only performed for interfaces
288 * with the same MAC address.
289 */
290 if (!ether_addr_equal(sdata->vif.addr,
291 nsdata->vif.addr))
292 continue;
293
294 /*
295 * check whether it may have the same address
296 */
297 if (!identical_mac_addr_allowed(iftype,
298 nsdata->vif.type))
299 return -ENOTUNIQ;
300
301 /*
302 * can only add VLANs to enabled APs
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 /* set up data */
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 /* ok .. stupid driver, it asked for this! */
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 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
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 /* no special treatment */
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 /* cannot happen */
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 /* we're brought up, everything changes */
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 * Copy the hopefully now-present MAC address to
568 * this interface, if it has the special null one.
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 /* no need to tell driver, but set carrier and chanctx */
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 /* must be before the call to ieee80211_configure_filter */
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 /* not reached */
664 WARN_ON(1);
665 }
666
667 /*
668 * Set default queue parameters so drivers don't
669 * need to initialise the hardware if the hardware
670 * doesn't start up with sane defaults.
671 * Enable QoS for anything but station interfaces.
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 /* Create STA entry for the WDS peer */
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 /* STA has been freed */
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 * set_multicast_list will be invoked by the networking core
716 * which will check whether any increments here were done in
717 * error and sync them down to the hardware as filter flags.
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 /* XXX: for AP_VLAN, actually track AP queues */
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 /* might already be clear but that doesn't matter */
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 /* fail early if user set an invalid address */
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_sub_if_data *txq_sdata = sdata;
797 struct ieee80211_local *local = sdata->local;
798 struct fq *fq = &local->fq;
799 unsigned long flags;
800 struct sk_buff *skb, *tmp;
801 u32 hw_reconf_flags = 0;
802 int i, flushed;
803 struct ps_data *ps;
804 struct cfg80211_chan_def chandef;
805 bool cancel_scan;
806 struct cfg80211_nan_func *func;
807
808 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
809
810 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
811 if (cancel_scan)
812 ieee80211_scan_cancel(local);
813
814 /*
815 * Stop TX on this interface first.
816 */
817 if (sdata->dev)
818 netif_tx_stop_all_queues(sdata->dev);
819
820 ieee80211_roc_purge(local, sdata);
821
822 switch (sdata->vif.type) {
823 case NL80211_IFTYPE_STATION:
824 ieee80211_mgd_stop(sdata);
825 break;
826 case NL80211_IFTYPE_ADHOC:
827 ieee80211_ibss_stop(sdata);
828 break;
829 case NL80211_IFTYPE_AP:
830 cancel_work_sync(&sdata->u.ap.request_smps_work);
831 break;
832 case NL80211_IFTYPE_MONITOR:
833 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
834 break;
835 list_del_rcu(&sdata->u.mntr.list);
836 break;
837 default:
838 break;
839 }
840
841 /*
842 * Remove all stations associated with this interface.
843 *
844 * This must be done before calling ops->remove_interface()
845 * because otherwise we can later invoke ops->sta_notify()
846 * whenever the STAs are removed, and that invalidates driver
847 * assumptions about always getting a vif pointer that is valid
848 * (because if we remove a STA after ops->remove_interface()
849 * the driver will have removed the vif info already!)
850 *
851 * In WDS mode a station must exist here and be flushed, for
852 * AP_VLANs stations may exist since there's nothing else that
853 * would have removed them, but in other modes there shouldn't
854 * be any stations.
855 */
856 flushed = sta_info_flush(sdata);
857 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
858 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
859 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
860
861 /* don't count this interface for allmulti while it is down */
862 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
863 atomic_dec(&local->iff_allmultis);
864
865 if (sdata->vif.type == NL80211_IFTYPE_AP) {
866 local->fif_pspoll--;
867 local->fif_probe_req--;
868 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
869 local->fif_probe_req--;
870 }
871
872 if (sdata->dev) {
873 netif_addr_lock_bh(sdata->dev);
874 spin_lock_bh(&local->filter_lock);
875 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
876 sdata->dev->addr_len);
877 spin_unlock_bh(&local->filter_lock);
878 netif_addr_unlock_bh(sdata->dev);
879 }
880
881 del_timer_sync(&local->dynamic_ps_timer);
882 cancel_work_sync(&local->dynamic_ps_enable_work);
883
884 cancel_work_sync(&sdata->recalc_smps);
885 sdata_lock(sdata);
886 mutex_lock(&local->mtx);
887 sdata->vif.csa_active = false;
888 if (sdata->vif.type == NL80211_IFTYPE_STATION)
889 sdata->u.mgd.csa_waiting_bcn = false;
890 if (sdata->csa_block_tx) {
891 ieee80211_wake_vif_queues(local, sdata,
892 IEEE80211_QUEUE_STOP_REASON_CSA);
893 sdata->csa_block_tx = false;
894 }
895 mutex_unlock(&local->mtx);
896 sdata_unlock(sdata);
897
898 cancel_work_sync(&sdata->csa_finalize_work);
899
900 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
901
902 if (sdata->wdev.cac_started) {
903 chandef = sdata->vif.bss_conf.chandef;
904 WARN_ON(local->suspended);
905 mutex_lock(&local->mtx);
906 ieee80211_vif_release_channel(sdata);
907 mutex_unlock(&local->mtx);
908 cfg80211_cac_event(sdata->dev, &chandef,
909 NL80211_RADAR_CAC_ABORTED,
910 GFP_KERNEL);
911 }
912
913 /* APs need special treatment */
914 if (sdata->vif.type == NL80211_IFTYPE_AP) {
915 struct ieee80211_sub_if_data *vlan, *tmpsdata;
916
917 /* down all dependent devices, that is VLANs */
918 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
919 u.vlan.list)
920 dev_close(vlan->dev);
921 WARN_ON(!list_empty(&sdata->u.ap.vlans));
922 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
923 /* remove all packets in parent bc_buf pointing to this dev */
924 ps = &sdata->bss->ps;
925
926 spin_lock_irqsave(&ps->bc_buf.lock, flags);
927 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
928 if (skb->dev == sdata->dev) {
929 __skb_unlink(skb, &ps->bc_buf);
930 local->total_ps_buffered--;
931 ieee80211_free_txskb(&local->hw, skb);
932 }
933 }
934 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
935 }
936
937 if (going_down)
938 local->open_count--;
939
940 switch (sdata->vif.type) {
941 case NL80211_IFTYPE_AP_VLAN:
942 txq_sdata = container_of(sdata->bss,
943 struct ieee80211_sub_if_data, u.ap);
944
945 mutex_lock(&local->mtx);
946 list_del(&sdata->u.vlan.list);
947 mutex_unlock(&local->mtx);
948 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
949 /* see comment in the default case below */
950 ieee80211_free_keys(sdata, true);
951 /* no need to tell driver */
952 break;
953 case NL80211_IFTYPE_MONITOR:
954 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
955 local->cooked_mntrs--;
956 break;
957 }
958
959 local->monitors--;
960 if (local->monitors == 0) {
961 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
962 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
963 }
964
965 ieee80211_adjust_monitor_flags(sdata, -1);
966 break;
967 case NL80211_IFTYPE_NAN:
968 /* clean all the functions */
969 spin_lock_bh(&sdata->u.nan.func_lock);
970
971 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
972 idr_remove(&sdata->u.nan.function_inst_ids, i);
973 cfg80211_free_nan_func(func);
974 }
975 idr_destroy(&sdata->u.nan.function_inst_ids);
976
977 spin_unlock_bh(&sdata->u.nan.func_lock);
978 break;
979 case NL80211_IFTYPE_P2P_DEVICE:
980 /* relies on synchronize_rcu() below */
981 RCU_INIT_POINTER(local->p2p_sdata, NULL);
982 /* fall through */
983 default:
984 cancel_work_sync(&sdata->work);
985 /*
986 * When we get here, the interface is marked down.
987 * Free the remaining keys, if there are any
988 * (which can happen in AP mode if userspace sets
989 * keys before the interface is operating, and maybe
990 * also in WDS mode)
991 *
992 * Force the key freeing to always synchronize_net()
993 * to wait for the RX path in case it is using this
994 * interface enqueuing frames at this very time on
995 * another CPU.
996 */
997 ieee80211_free_keys(sdata, true);
998 skb_queue_purge(&sdata->skb_queue);
999 }
1000
1001 sdata->bss = NULL;
1002
1003 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1004 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1005 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1006 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1007 if (info->control.vif == &sdata->vif) {
1008 __skb_unlink(skb, &local->pending[i]);
1009 ieee80211_free_txskb(&local->hw, skb);
1010 }
1011 }
1012 }
1013 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1014
1015 if (txq_sdata->vif.txq) {
1016 struct txq_info *txqi = to_txq_info(txq_sdata->vif.txq);
1017
1018 /*
1019 * FIXME FIXME
1020 *
1021 * We really shouldn't purge the *entire* txqi since that
1022 * contains frames for the other AP_VLANs (and possibly
1023 * the AP itself) as well, but there's no API in FQ now
1024 * to be able to filter.
1025 */
1026
1027 spin_lock_bh(&fq->lock);
1028 ieee80211_txq_purge(local, txqi);
1029 spin_unlock_bh(&fq->lock);
1030 }
1031
1032 if (local->open_count == 0)
1033 ieee80211_clear_tx_pending(local);
1034
1035 sdata->vif.bss_conf.beacon_int = 0;
1036
1037 /*
1038 * If the interface goes down while suspended, presumably because
1039 * the device was unplugged and that happens before our resume,
1040 * then the driver is already unconfigured and the remainder of
1041 * this function isn't needed.
1042 * XXX: what about WoWLAN? If the device has software state, e.g.
1043 * memory allocated, it might expect teardown commands from
1044 * mac80211 here?
1045 */
1046 if (local->suspended) {
1047 WARN_ON(local->wowlan);
1048 WARN_ON(rtnl_dereference(local->monitor_sdata));
1049 return;
1050 }
1051
1052 switch (sdata->vif.type) {
1053 case NL80211_IFTYPE_AP_VLAN:
1054 break;
1055 case NL80211_IFTYPE_MONITOR:
1056 if (local->monitors == 0)
1057 ieee80211_del_virtual_monitor(local);
1058
1059 mutex_lock(&local->mtx);
1060 ieee80211_recalc_idle(local);
1061 mutex_unlock(&local->mtx);
1062
1063 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1064 break;
1065
1066 /* fall through */
1067 default:
1068 if (going_down)
1069 drv_remove_interface(local, sdata);
1070 }
1071
1072 ieee80211_recalc_ps(local);
1073
1074 if (cancel_scan)
1075 flush_delayed_work(&local->scan_work);
1076
1077 if (local->open_count == 0) {
1078 ieee80211_stop_device(local);
1079
1080 /* no reconfiguring after stop! */
1081 return;
1082 }
1083
1084 /* do after stop to avoid reconfiguring when we stop anyway */
1085 ieee80211_configure_filter(local);
1086 ieee80211_hw_config(local, hw_reconf_flags);
1087
1088 if (local->monitors == local->open_count)
1089 ieee80211_add_virtual_monitor(local);
1090}
1091
1092static int ieee80211_stop(struct net_device *dev)
1093{
1094 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1095
1096 ieee80211_do_stop(sdata, true);
1097
1098 return 0;
1099}
1100
1101static void ieee80211_set_multicast_list(struct net_device *dev)
1102{
1103 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1104 struct ieee80211_local *local = sdata->local;
1105 int allmulti, sdata_allmulti;
1106
1107 allmulti = !!(dev->flags & IFF_ALLMULTI);
1108 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1109
1110 if (allmulti != sdata_allmulti) {
1111 if (dev->flags & IFF_ALLMULTI)
1112 atomic_inc(&local->iff_allmultis);
1113 else
1114 atomic_dec(&local->iff_allmultis);
1115 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1116 }
1117
1118 spin_lock_bh(&local->filter_lock);
1119 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1120 spin_unlock_bh(&local->filter_lock);
1121 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1122}
1123
1124/*
1125 * Called when the netdev is removed or, by the code below, before
1126 * the interface type changes.
1127 */
1128static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1129{
1130 int i;
1131
1132 /* free extra data */
1133 ieee80211_free_keys(sdata, false);
1134
1135 ieee80211_debugfs_remove_netdev(sdata);
1136
1137 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1138 __skb_queue_purge(&sdata->fragments[i].skb_list);
1139 sdata->fragment_next = 0;
1140
1141 if (ieee80211_vif_is_mesh(&sdata->vif))
1142 ieee80211_mesh_teardown_sdata(sdata);
1143}
1144
1145static void ieee80211_uninit(struct net_device *dev)
1146{
1147 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1148}
1149
1150static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1151 struct sk_buff *skb,
1152 void *accel_priv,
1153 select_queue_fallback_t fallback)
1154{
1155 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1156}
1157
1158static void
1159ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1160{
1161 int i;
1162
1163 for_each_possible_cpu(i) {
1164 const struct pcpu_sw_netstats *tstats;
1165 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1166 unsigned int start;
1167
1168 tstats = per_cpu_ptr(dev->tstats, i);
1169
1170 do {
1171 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1172 rx_packets = tstats->rx_packets;
1173 tx_packets = tstats->tx_packets;
1174 rx_bytes = tstats->rx_bytes;
1175 tx_bytes = tstats->tx_bytes;
1176 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1177
1178 stats->rx_packets += rx_packets;
1179 stats->tx_packets += tx_packets;
1180 stats->rx_bytes += rx_bytes;
1181 stats->tx_bytes += tx_bytes;
1182 }
1183}
1184
1185static const struct net_device_ops ieee80211_dataif_ops = {
1186 .ndo_open = ieee80211_open,
1187 .ndo_stop = ieee80211_stop,
1188 .ndo_uninit = ieee80211_uninit,
1189 .ndo_start_xmit = ieee80211_subif_start_xmit,
1190 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1191 .ndo_set_mac_address = ieee80211_change_mac,
1192 .ndo_select_queue = ieee80211_netdev_select_queue,
1193 .ndo_get_stats64 = ieee80211_get_stats64,
1194};
1195
1196static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1197 struct sk_buff *skb,
1198 void *accel_priv,
1199 select_queue_fallback_t fallback)
1200{
1201 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1202 struct ieee80211_local *local = sdata->local;
1203 struct ieee80211_hdr *hdr;
1204 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1205
1206 if (local->hw.queues < IEEE80211_NUM_ACS)
1207 return 0;
1208
1209 if (skb->len < 4 ||
1210 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1211 return 0; /* doesn't matter, frame will be dropped */
1212
1213 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1214
1215 return ieee80211_select_queue_80211(sdata, skb, hdr);
1216}
1217
1218static const struct net_device_ops ieee80211_monitorif_ops = {
1219 .ndo_open = ieee80211_open,
1220 .ndo_stop = ieee80211_stop,
1221 .ndo_uninit = ieee80211_uninit,
1222 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1223 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1224 .ndo_set_mac_address = ieee80211_change_mac,
1225 .ndo_select_queue = ieee80211_monitor_select_queue,
1226 .ndo_get_stats64 = ieee80211_get_stats64,
1227};
1228
1229static void ieee80211_if_free(struct net_device *dev)
1230{
1231 free_percpu(dev->tstats);
1232}
1233
1234static void ieee80211_if_setup(struct net_device *dev)
1235{
1236 ether_setup(dev);
1237 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1238 dev->netdev_ops = &ieee80211_dataif_ops;
1239 dev->needs_free_netdev = true;
1240 dev->priv_destructor = ieee80211_if_free;
1241}
1242
1243static void ieee80211_if_setup_no_queue(struct net_device *dev)
1244{
1245 ieee80211_if_setup(dev);
1246 dev->priv_flags |= IFF_NO_QUEUE;
1247}
1248
1249static void ieee80211_iface_work(struct work_struct *work)
1250{
1251 struct ieee80211_sub_if_data *sdata =
1252 container_of(work, struct ieee80211_sub_if_data, work);
1253 struct ieee80211_local *local = sdata->local;
1254 struct sk_buff *skb;
1255 struct sta_info *sta;
1256
1257 if (!ieee80211_sdata_running(sdata))
1258 return;
1259
1260 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1261 return;
1262
1263 if (!ieee80211_can_run_worker(local))
1264 return;
1265
1266 /* first process frames */
1267 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1268 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1269
1270 if (ieee80211_is_action(mgmt->frame_control) &&
1271 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1272 int len = skb->len;
1273
1274 mutex_lock(&local->sta_mtx);
1275 sta = sta_info_get_bss(sdata, mgmt->sa);
1276 if (sta) {
1277 switch (mgmt->u.action.u.addba_req.action_code) {
1278 case WLAN_ACTION_ADDBA_REQ:
1279 ieee80211_process_addba_request(
1280 local, sta, mgmt, len);
1281 break;
1282 case WLAN_ACTION_ADDBA_RESP:
1283 ieee80211_process_addba_resp(local, sta,
1284 mgmt, len);
1285 break;
1286 case WLAN_ACTION_DELBA:
1287 ieee80211_process_delba(sdata, sta,
1288 mgmt, len);
1289 break;
1290 default:
1291 WARN_ON(1);
1292 break;
1293 }
1294 }
1295 mutex_unlock(&local->sta_mtx);
1296 } else if (ieee80211_is_action(mgmt->frame_control) &&
1297 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1298 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1299 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1300 struct ieee80211_rx_status *status;
1301 enum nl80211_band band;
1302 u8 opmode;
1303
1304 status = IEEE80211_SKB_RXCB(skb);
1305 band = status->band;
1306 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1307
1308 mutex_lock(&local->sta_mtx);
1309 sta = sta_info_get_bss(sdata, mgmt->sa);
1310
1311 if (sta)
1312 ieee80211_vht_handle_opmode(sdata, sta,
1313 opmode,
1314 band);
1315
1316 mutex_unlock(&local->sta_mtx);
1317 break;
1318 }
1319 case WLAN_VHT_ACTION_GROUPID_MGMT:
1320 ieee80211_process_mu_groups(sdata, mgmt);
1321 break;
1322 default:
1323 WARN_ON(1);
1324 break;
1325 }
1326 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1327 struct ieee80211_hdr *hdr = (void *)mgmt;
1328 /*
1329 * So the frame isn't mgmt, but frame_control
1330 * is at the right place anyway, of course, so
1331 * the if statement is correct.
1332 *
1333 * Warn if we have other data frame types here,
1334 * they must not get here.
1335 */
1336 WARN_ON(hdr->frame_control &
1337 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1338 WARN_ON(!(hdr->seq_ctrl &
1339 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1340 /*
1341 * This was a fragment of a frame, received while
1342 * a block-ack session was active. That cannot be
1343 * right, so terminate the session.
1344 */
1345 mutex_lock(&local->sta_mtx);
1346 sta = sta_info_get_bss(sdata, mgmt->sa);
1347 if (sta) {
1348 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1349 IEEE80211_QOS_CTL_TID_MASK;
1350
1351 __ieee80211_stop_rx_ba_session(
1352 sta, tid, WLAN_BACK_RECIPIENT,
1353 WLAN_REASON_QSTA_REQUIRE_SETUP,
1354 true);
1355 }
1356 mutex_unlock(&local->sta_mtx);
1357 } else switch (sdata->vif.type) {
1358 case NL80211_IFTYPE_STATION:
1359 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1360 break;
1361 case NL80211_IFTYPE_ADHOC:
1362 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1363 break;
1364 case NL80211_IFTYPE_MESH_POINT:
1365 if (!ieee80211_vif_is_mesh(&sdata->vif))
1366 break;
1367 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1368 break;
1369 default:
1370 WARN(1, "frame for unexpected interface type");
1371 break;
1372 }
1373
1374 kfree_skb(skb);
1375 }
1376
1377 /* then other type-dependent work */
1378 switch (sdata->vif.type) {
1379 case NL80211_IFTYPE_STATION:
1380 ieee80211_sta_work(sdata);
1381 break;
1382 case NL80211_IFTYPE_ADHOC:
1383 ieee80211_ibss_work(sdata);
1384 break;
1385 case NL80211_IFTYPE_MESH_POINT:
1386 if (!ieee80211_vif_is_mesh(&sdata->vif))
1387 break;
1388 ieee80211_mesh_work(sdata);
1389 break;
1390 case NL80211_IFTYPE_OCB:
1391 ieee80211_ocb_work(sdata);
1392 break;
1393 default:
1394 break;
1395 }
1396}
1397
1398static void ieee80211_recalc_smps_work(struct work_struct *work)
1399{
1400 struct ieee80211_sub_if_data *sdata =
1401 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1402
1403 ieee80211_recalc_smps(sdata);
1404}
1405
1406/*
1407 * Helper function to initialise an interface to a specific type.
1408 */
1409static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1410 enum nl80211_iftype type)
1411{
1412 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1413 0xff, 0xff, 0xff};
1414
1415 /* clear type-dependent union */
1416 memset(&sdata->u, 0, sizeof(sdata->u));
1417
1418 /* and set some type-dependent values */
1419 sdata->vif.type = type;
1420 sdata->vif.p2p = false;
1421 sdata->wdev.iftype = type;
1422
1423 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1424 sdata->control_port_no_encrypt = false;
1425 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1426 sdata->vif.bss_conf.idle = true;
1427
1428 sdata->noack_map = 0;
1429
1430 /* only monitor/p2p-device differ */
1431 if (sdata->dev) {
1432 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1433 sdata->dev->type = ARPHRD_ETHER;
1434 }
1435
1436 skb_queue_head_init(&sdata->skb_queue);
1437 INIT_WORK(&sdata->work, ieee80211_iface_work);
1438 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1439 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1440 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1441 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1442
1443 switch (type) {
1444 case NL80211_IFTYPE_P2P_GO:
1445 type = NL80211_IFTYPE_AP;
1446 sdata->vif.type = type;
1447 sdata->vif.p2p = true;
1448 /* fall through */
1449 case NL80211_IFTYPE_AP:
1450 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1451 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1452 INIT_WORK(&sdata->u.ap.request_smps_work,
1453 ieee80211_request_smps_ap_work);
1454 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1455 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1456 break;
1457 case NL80211_IFTYPE_P2P_CLIENT:
1458 type = NL80211_IFTYPE_STATION;
1459 sdata->vif.type = type;
1460 sdata->vif.p2p = true;
1461 /* fall through */
1462 case NL80211_IFTYPE_STATION:
1463 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1464 ieee80211_sta_setup_sdata(sdata);
1465 break;
1466 case NL80211_IFTYPE_OCB:
1467 sdata->vif.bss_conf.bssid = bssid_wildcard;
1468 ieee80211_ocb_setup_sdata(sdata);
1469 break;
1470 case NL80211_IFTYPE_ADHOC:
1471 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1472 ieee80211_ibss_setup_sdata(sdata);
1473 break;
1474 case NL80211_IFTYPE_MESH_POINT:
1475 if (ieee80211_vif_is_mesh(&sdata->vif))
1476 ieee80211_mesh_init_sdata(sdata);
1477 break;
1478 case NL80211_IFTYPE_MONITOR:
1479 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1480 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1481 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1482 MONITOR_FLAG_OTHER_BSS;
1483 break;
1484 case NL80211_IFTYPE_WDS:
1485 sdata->vif.bss_conf.bssid = NULL;
1486 break;
1487 case NL80211_IFTYPE_NAN:
1488 idr_init(&sdata->u.nan.function_inst_ids);
1489 spin_lock_init(&sdata->u.nan.func_lock);
1490 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1491 break;
1492 case NL80211_IFTYPE_AP_VLAN:
1493 case NL80211_IFTYPE_P2P_DEVICE:
1494 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1495 break;
1496 case NL80211_IFTYPE_UNSPECIFIED:
1497 case NUM_NL80211_IFTYPES:
1498 WARN_ON(1);
1499 break;
1500 }
1501
1502 ieee80211_debugfs_add_netdev(sdata);
1503}
1504
1505static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1506 enum nl80211_iftype type)
1507{
1508 struct ieee80211_local *local = sdata->local;
1509 int ret, err;
1510 enum nl80211_iftype internal_type = type;
1511 bool p2p = false;
1512
1513 ASSERT_RTNL();
1514
1515 if (!local->ops->change_interface)
1516 return -EBUSY;
1517
1518 switch (sdata->vif.type) {
1519 case NL80211_IFTYPE_AP:
1520 case NL80211_IFTYPE_STATION:
1521 case NL80211_IFTYPE_ADHOC:
1522 case NL80211_IFTYPE_OCB:
1523 /*
1524 * Could maybe also all others here?
1525 * Just not sure how that interacts
1526 * with the RX/config path e.g. for
1527 * mesh.
1528 */
1529 break;
1530 default:
1531 return -EBUSY;
1532 }
1533
1534 switch (type) {
1535 case NL80211_IFTYPE_AP:
1536 case NL80211_IFTYPE_STATION:
1537 case NL80211_IFTYPE_ADHOC:
1538 case NL80211_IFTYPE_OCB:
1539 /*
1540 * Could probably support everything
1541 * but WDS here (WDS do_open can fail
1542 * under memory pressure, which this
1543 * code isn't prepared to handle).
1544 */
1545 break;
1546 case NL80211_IFTYPE_P2P_CLIENT:
1547 p2p = true;
1548 internal_type = NL80211_IFTYPE_STATION;
1549 break;
1550 case NL80211_IFTYPE_P2P_GO:
1551 p2p = true;
1552 internal_type = NL80211_IFTYPE_AP;
1553 break;
1554 default:
1555 return -EBUSY;
1556 }
1557
1558 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1559 if (ret)
1560 return ret;
1561
1562 ieee80211_do_stop(sdata, false);
1563
1564 ieee80211_teardown_sdata(sdata);
1565
1566 ret = drv_change_interface(local, sdata, internal_type, p2p);
1567 if (ret)
1568 type = ieee80211_vif_type_p2p(&sdata->vif);
1569
1570 /*
1571 * Ignore return value here, there's not much we can do since
1572 * the driver changed the interface type internally already.
1573 * The warnings will hopefully make driver authors fix it :-)
1574 */
1575 ieee80211_check_queues(sdata, type);
1576
1577 ieee80211_setup_sdata(sdata, type);
1578
1579 err = ieee80211_do_open(&sdata->wdev, false);
1580 WARN(err, "type change: do_open returned %d", err);
1581
1582 return ret;
1583}
1584
1585int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1586 enum nl80211_iftype type)
1587{
1588 int ret;
1589
1590 ASSERT_RTNL();
1591
1592 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1593 return 0;
1594
1595 if (ieee80211_sdata_running(sdata)) {
1596 ret = ieee80211_runtime_change_iftype(sdata, type);
1597 if (ret)
1598 return ret;
1599 } else {
1600 /* Purge and reset type-dependent state. */
1601 ieee80211_teardown_sdata(sdata);
1602 ieee80211_setup_sdata(sdata, type);
1603 }
1604
1605 /* reset some values that shouldn't be kept across type changes */
1606 if (type == NL80211_IFTYPE_STATION)
1607 sdata->u.mgd.use_4addr = false;
1608
1609 return 0;
1610}
1611
1612static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1613 u8 *perm_addr, enum nl80211_iftype type)
1614{
1615 struct ieee80211_sub_if_data *sdata;
1616 u64 mask, start, addr, val, inc;
1617 u8 *m;
1618 u8 tmp_addr[ETH_ALEN];
1619 int i;
1620
1621 /* default ... something at least */
1622 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1623
1624 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1625 local->hw.wiphy->n_addresses <= 1)
1626 return;
1627
1628 mutex_lock(&local->iflist_mtx);
1629
1630 switch (type) {
1631 case NL80211_IFTYPE_MONITOR:
1632 /* doesn't matter */
1633 break;
1634 case NL80211_IFTYPE_WDS:
1635 case NL80211_IFTYPE_AP_VLAN:
1636 /* match up with an AP interface */
1637 list_for_each_entry(sdata, &local->interfaces, list) {
1638 if (sdata->vif.type != NL80211_IFTYPE_AP)
1639 continue;
1640 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1641 break;
1642 }
1643 /* keep default if no AP interface present */
1644 break;
1645 case NL80211_IFTYPE_P2P_CLIENT:
1646 case NL80211_IFTYPE_P2P_GO:
1647 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1648 list_for_each_entry(sdata, &local->interfaces, list) {
1649 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1650 continue;
1651 if (!ieee80211_sdata_running(sdata))
1652 continue;
1653 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1654 goto out_unlock;
1655 }
1656 }
1657 /* otherwise fall through */
1658 default:
1659 /* assign a new address if possible -- try n_addresses first */
1660 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1661 bool used = false;
1662
1663 list_for_each_entry(sdata, &local->interfaces, list) {
1664 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1665 sdata->vif.addr)) {
1666 used = true;
1667 break;
1668 }
1669 }
1670
1671 if (!used) {
1672 memcpy(perm_addr,
1673 local->hw.wiphy->addresses[i].addr,
1674 ETH_ALEN);
1675 break;
1676 }
1677 }
1678
1679 /* try mask if available */
1680 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1681 break;
1682
1683 m = local->hw.wiphy->addr_mask;
1684 mask = ((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 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1689 /* not a contiguous mask ... not handled now! */
1690 pr_info("not contiguous\n");
1691 break;
1692 }
1693
1694 /*
1695 * Pick address of existing interface in case user changed
1696 * MAC address manually, default to perm_addr.
1697 */
1698 m = local->hw.wiphy->perm_addr;
1699 list_for_each_entry(sdata, &local->interfaces, list) {
1700 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1701 continue;
1702 m = sdata->vif.addr;
1703 break;
1704 }
1705 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1706 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1707 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1708
1709 inc = 1ULL<<__ffs64(mask);
1710 val = (start & mask);
1711 addr = (start & ~mask) | (val & mask);
1712 do {
1713 bool used = false;
1714
1715 tmp_addr[5] = addr >> 0*8;
1716 tmp_addr[4] = addr >> 1*8;
1717 tmp_addr[3] = addr >> 2*8;
1718 tmp_addr[2] = addr >> 3*8;
1719 tmp_addr[1] = addr >> 4*8;
1720 tmp_addr[0] = addr >> 5*8;
1721
1722 val += inc;
1723
1724 list_for_each_entry(sdata, &local->interfaces, list) {
1725 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1726 used = true;
1727 break;
1728 }
1729 }
1730
1731 if (!used) {
1732 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1733 break;
1734 }
1735 addr = (start & ~mask) | (val & mask);
1736 } while (addr != start);
1737
1738 break;
1739 }
1740
1741 out_unlock:
1742 mutex_unlock(&local->iflist_mtx);
1743}
1744
1745int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1746 unsigned char name_assign_type,
1747 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1748 struct vif_params *params)
1749{
1750 struct net_device *ndev = NULL;
1751 struct ieee80211_sub_if_data *sdata = NULL;
1752 struct txq_info *txqi;
1753 void (*if_setup)(struct net_device *dev);
1754 int ret, i;
1755 int txqs = 1;
1756
1757 ASSERT_RTNL();
1758
1759 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1760 struct wireless_dev *wdev;
1761
1762 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1763 GFP_KERNEL);
1764 if (!sdata)
1765 return -ENOMEM;
1766 wdev = &sdata->wdev;
1767
1768 sdata->dev = NULL;
1769 strlcpy(sdata->name, name, IFNAMSIZ);
1770 ieee80211_assign_perm_addr(local, wdev->address, type);
1771 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1772 } else {
1773 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1774 sizeof(void *));
1775 int txq_size = 0;
1776
1777 if (local->ops->wake_tx_queue)
1778 txq_size += sizeof(struct txq_info) +
1779 local->hw.txq_data_size;
1780
1781 if (local->ops->wake_tx_queue)
1782 if_setup = ieee80211_if_setup_no_queue;
1783 else
1784 if_setup = ieee80211_if_setup;
1785
1786 if (local->hw.queues >= IEEE80211_NUM_ACS)
1787 txqs = IEEE80211_NUM_ACS;
1788
1789 ndev = alloc_netdev_mqs(size + txq_size,
1790 name, name_assign_type,
1791 if_setup, txqs, 1);
1792 if (!ndev)
1793 return -ENOMEM;
1794 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1795
1796 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1797 if (!ndev->tstats) {
1798 free_netdev(ndev);
1799 return -ENOMEM;
1800 }
1801
1802 ndev->needed_headroom = local->tx_headroom +
1803 4*6 /* four MAC addresses */
1804 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1805 + 6 /* mesh */
1806 + 8 /* rfc1042/bridge tunnel */
1807 - ETH_HLEN /* ethernet hard_header_len */
1808 + IEEE80211_ENCRYPT_HEADROOM;
1809 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1810
1811 ret = dev_alloc_name(ndev, ndev->name);
1812 if (ret < 0) {
1813 ieee80211_if_free(ndev);
1814 free_netdev(ndev);
1815 return ret;
1816 }
1817
1818 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1819 if (params && is_valid_ether_addr(params->macaddr))
1820 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1821 else
1822 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1823 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1824
1825 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1826 sdata = netdev_priv(ndev);
1827 ndev->ieee80211_ptr = &sdata->wdev;
1828 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1829 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1830
1831 if (txq_size) {
1832 txqi = netdev_priv(ndev) + size;
1833 ieee80211_txq_init(sdata, NULL, txqi, 0);
1834 }
1835
1836 sdata->dev = ndev;
1837 }
1838
1839 /* initialise type-independent data */
1840 sdata->wdev.wiphy = local->hw.wiphy;
1841 sdata->local = local;
1842
1843 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1844 skb_queue_head_init(&sdata->fragments[i].skb_list);
1845
1846 INIT_LIST_HEAD(&sdata->key_list);
1847
1848 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1849 ieee80211_dfs_cac_timer_work);
1850 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1851 ieee80211_delayed_tailroom_dec);
1852
1853 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1854 struct ieee80211_supported_band *sband;
1855 sband = local->hw.wiphy->bands[i];
1856 sdata->rc_rateidx_mask[i] =
1857 sband ? (1 << sband->n_bitrates) - 1 : 0;
1858 if (sband) {
1859 __le16 cap;
1860 u16 *vht_rate_mask;
1861
1862 memcpy(sdata->rc_rateidx_mcs_mask[i],
1863 sband->ht_cap.mcs.rx_mask,
1864 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1865
1866 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1867 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1868 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1869 } else {
1870 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1871 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1872 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1873 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1874 }
1875 }
1876
1877 ieee80211_set_default_queues(sdata);
1878
1879 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1880 sdata->user_power_level = local->user_power_level;
1881
1882 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1883
1884 /* setup type-dependent data */
1885 ieee80211_setup_sdata(sdata, type);
1886
1887 if (ndev) {
1888 if (params) {
1889 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1890 if (type == NL80211_IFTYPE_STATION)
1891 sdata->u.mgd.use_4addr = params->use_4addr;
1892 }
1893
1894 ndev->features |= local->hw.netdev_features;
1895
1896 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1897
1898 /* MTU range: 256 - 2304 */
1899 ndev->min_mtu = 256;
1900 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1901
1902 ret = register_netdevice(ndev);
1903 if (ret) {
1904 free_netdev(ndev);
1905 return ret;
1906 }
1907 }
1908
1909 mutex_lock(&local->iflist_mtx);
1910 list_add_tail_rcu(&sdata->list, &local->interfaces);
1911 mutex_unlock(&local->iflist_mtx);
1912
1913 if (new_wdev)
1914 *new_wdev = &sdata->wdev;
1915
1916 return 0;
1917}
1918
1919void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1920{
1921 ASSERT_RTNL();
1922
1923 mutex_lock(&sdata->local->iflist_mtx);
1924 list_del_rcu(&sdata->list);
1925 mutex_unlock(&sdata->local->iflist_mtx);
1926
1927 if (sdata->vif.txq)
1928 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1929
1930 synchronize_rcu();
1931
1932 if (sdata->dev) {
1933 unregister_netdevice(sdata->dev);
1934 } else {
1935 cfg80211_unregister_wdev(&sdata->wdev);
1936 ieee80211_teardown_sdata(sdata);
1937 kfree(sdata);
1938 }
1939}
1940
1941void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1942{
1943 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1944 return;
1945 ieee80211_do_stop(sdata, true);
1946}
1947
1948void ieee80211_remove_interfaces(struct ieee80211_local *local)
1949{
1950 struct ieee80211_sub_if_data *sdata, *tmp;
1951 LIST_HEAD(unreg_list);
1952 LIST_HEAD(wdev_list);
1953
1954 ASSERT_RTNL();
1955
1956 /* Before destroying the interfaces, make sure they're all stopped so
1957 * that the hardware is stopped. Otherwise, the driver might still be
1958 * iterating the interfaces during the shutdown, e.g. from a worker
1959 * or from RX processing or similar, and if it does so (using atomic
1960 * iteration) while we're manipulating the list, the iteration will
1961 * crash.
1962 *
1963 * After this, the hardware should be stopped and the driver should
1964 * have stopped all of its activities, so that we can do RCU-unaware
1965 * manipulations of the interface list below.
1966 */
1967 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1968
1969 WARN(local->open_count, "%s: open count remains %d\n",
1970 wiphy_name(local->hw.wiphy), local->open_count);
1971
1972 mutex_lock(&local->iflist_mtx);
1973 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1974 list_del(&sdata->list);
1975
1976 if (sdata->dev)
1977 unregister_netdevice_queue(sdata->dev, &unreg_list);
1978 else
1979 list_add(&sdata->list, &wdev_list);
1980 }
1981 mutex_unlock(&local->iflist_mtx);
1982 unregister_netdevice_many(&unreg_list);
1983
1984 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1985 list_del(&sdata->list);
1986 cfg80211_unregister_wdev(&sdata->wdev);
1987 kfree(sdata);
1988 }
1989}
1990
1991static int netdev_notify(struct notifier_block *nb,
1992 unsigned long state, void *ptr)
1993{
1994 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1995 struct ieee80211_sub_if_data *sdata;
1996
1997 if (state != NETDEV_CHANGENAME)
1998 return NOTIFY_DONE;
1999
2000 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2001 return NOTIFY_DONE;
2002
2003 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2004 return NOTIFY_DONE;
2005
2006 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2007 memcpy(sdata->name, dev->name, IFNAMSIZ);
2008 ieee80211_debugfs_rename_netdev(sdata);
2009
2010 return NOTIFY_OK;
2011}
2012
2013static struct notifier_block mac80211_netdev_notifier = {
2014 .notifier_call = netdev_notify,
2015};
2016
2017int ieee80211_iface_init(void)
2018{
2019 return register_netdevice_notifier(&mac80211_netdev_notifier);
2020}
2021
2022void ieee80211_iface_exit(void)
2023{
2024 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2025}
2026
2027void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2028{
2029 if (sdata->vif.type == NL80211_IFTYPE_AP)
2030 atomic_inc(&sdata->u.ap.num_mcast_sta);
2031 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2032 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2033}
2034
2035void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2036{
2037 if (sdata->vif.type == NL80211_IFTYPE_AP)
2038 atomic_dec(&sdata->u.ap.num_mcast_sta);
2039 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2040 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2041}