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spi: sprd: adi: Change hwlock to be optional
[linux/fpc-iii.git] / net / mac80211 / iface.c
blob06aac0aaae646cda1f3bca4aab7363922225be58
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Interface handling
4 *
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018 Intel Corporation
12 */
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
21 #include "sta_info.h"
22 #include "debugfs_netdev.h"
23 #include "mesh.h"
24 #include "led.h"
25 #include "driver-ops.h"
26 #include "wme.h"
27 #include "rate.h"
28
29 /**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
45 static void ieee80211_iface_work(struct work_struct *work);
46
47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
48 {
49 struct ieee80211_chanctx_conf *chanctx_conf;
50 int power;
51
52 rcu_read_lock();
53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
54 if (!chanctx_conf) {
55 rcu_read_unlock();
56 return false;
57 }
58
59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
60 rcu_read_unlock();
61
62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->user_power_level);
64
65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->ap_power_level);
67
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
71 return true;
72 }
73
74 return false;
75 }
76
77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
78 bool update_bss)
79 {
80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
83 }
84
85 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
86 {
87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
88 return 0;
89
90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
91 return IEEE80211_CONF_CHANGE_IDLE;
92 }
93
94 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
95 {
96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
97 return 0;
98
99 ieee80211_flush_queues(local, NULL, false);
100
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
103 }
104
105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
106 bool force_active)
107 {
108 bool working, scanning, active;
109 unsigned int led_trig_start = 0, led_trig_stop = 0;
110
111 lockdep_assert_held(&local->mtx);
112
113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
115 local->monitors;
116
117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
119
120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122
123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 else
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127
128 if (active)
129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 else
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134
135 if (working || scanning || active)
136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
138 }
139
140 u32 ieee80211_idle_off(struct ieee80211_local *local)
141 {
142 return __ieee80211_recalc_idle(local, true);
143 }
144
145 void ieee80211_recalc_idle(struct ieee80211_local *local)
146 {
147 u32 change = __ieee80211_recalc_idle(local, false);
148 if (change)
149 ieee80211_hw_config(local, change);
150 }
151
152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
153 bool check_dup)
154 {
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
157 u64 new, mask, tmp;
158 u8 *m;
159 int ret = 0;
160
161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
162 return 0;
163
164 m = addr;
165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
168
169 m = local->hw.wiphy->addr_mask;
170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
173
174 if (!check_dup)
175 return ret;
176
177 mutex_lock(&local->iflist_mtx);
178 list_for_each_entry(iter, &local->interfaces, list) {
179 if (iter == sdata)
180 continue;
181
182 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
184 continue;
185
186 m = iter->vif.addr;
187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
190
191 if ((new & ~mask) != (tmp & ~mask)) {
192 ret = -EINVAL;
193 break;
194 }
195 }
196 mutex_unlock(&local->iflist_mtx);
197
198 return ret;
199 }
200
201 static int ieee80211_change_mac(struct net_device *dev, void *addr)
202 {
203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
204 struct sockaddr *sa = addr;
205 bool check_dup = true;
206 int ret;
207
208 if (ieee80211_sdata_running(sdata))
209 return -EBUSY;
210
211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
213 check_dup = false;
214
215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
216 if (ret)
217 return ret;
218
219 ret = eth_mac_addr(dev, sa);
220
221 if (ret == 0)
222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
223
224 return ret;
225 }
226
227 static inline int identical_mac_addr_allowed(int type1, int type2)
228 {
229 return type1 == NL80211_IFTYPE_MONITOR ||
230 type2 == NL80211_IFTYPE_MONITOR ||
231 type1 == NL80211_IFTYPE_P2P_DEVICE ||
232 type2 == NL80211_IFTYPE_P2P_DEVICE ||
233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
234 (type1 == NL80211_IFTYPE_WDS &&
235 (type2 == NL80211_IFTYPE_WDS ||
236 type2 == NL80211_IFTYPE_AP)) ||
237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
238 (type1 == NL80211_IFTYPE_AP_VLAN &&
239 (type2 == NL80211_IFTYPE_AP ||
240 type2 == NL80211_IFTYPE_AP_VLAN));
241 }
242
243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
244 enum nl80211_iftype iftype)
245 {
246 struct ieee80211_local *local = sdata->local;
247 struct ieee80211_sub_if_data *nsdata;
248 int ret;
249
250 ASSERT_RTNL();
251
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
255 /*
256 * Only OCB and monitor mode may coexist
257 */
258 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
260 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
261 nsdata->vif.type == NL80211_IFTYPE_OCB))
262 return -EBUSY;
263
264 /*
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
268 *
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
273 */
274 if (iftype == NL80211_IFTYPE_ADHOC &&
275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
276 return -EBUSY;
277 /*
278 * will not add another interface while any channel
279 * switch is active.
280 */
281 if (nsdata->vif.csa_active)
282 return -EBUSY;
283
284 /*
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
287 */
288 if (!ether_addr_equal(sdata->vif.addr,
289 nsdata->vif.addr))
290 continue;
291
292 /*
293 * check whether it may have the same address
294 */
295 if (!identical_mac_addr_allowed(iftype,
296 nsdata->vif.type))
297 return -ENOTUNIQ;
298
299 /*
300 * can only add VLANs to enabled APs
301 */
302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
305 }
306 }
307
308 mutex_lock(&local->chanctx_mtx);
309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
310 mutex_unlock(&local->chanctx_mtx);
311 return ret;
312 }
313
314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
315 enum nl80211_iftype iftype)
316 {
317 int n_queues = sdata->local->hw.queues;
318 int i;
319
320 if (iftype == NL80211_IFTYPE_NAN)
321 return 0;
322
323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
324 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
326 IEEE80211_INVAL_HW_QUEUE))
327 return -EINVAL;
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
329 n_queues))
330 return -EINVAL;
331 }
332 }
333
334 if ((iftype != NL80211_IFTYPE_AP &&
335 iftype != NL80211_IFTYPE_P2P_GO &&
336 iftype != NL80211_IFTYPE_MESH_POINT) ||
337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
339 return 0;
340 }
341
342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
343 return -EINVAL;
344
345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
346 return -EINVAL;
347
348 return 0;
349 }
350
351 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
352 const int offset)
353 {
354 struct ieee80211_local *local = sdata->local;
355 u32 flags = sdata->u.mntr.flags;
356
357 #define ADJUST(_f, _s) do { \
358 if (flags & MONITOR_FLAG_##_f) \
359 local->fif_##_s += offset; \
360 } while (0)
361
362 ADJUST(FCSFAIL, fcsfail);
363 ADJUST(PLCPFAIL, plcpfail);
364 ADJUST(CONTROL, control);
365 ADJUST(CONTROL, pspoll);
366 ADJUST(OTHER_BSS, other_bss);
367
368 #undef ADJUST
369 }
370
371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
372 {
373 struct ieee80211_local *local = sdata->local;
374 int i;
375
376 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
379 else if (local->hw.queues >= IEEE80211_NUM_ACS)
380 sdata->vif.hw_queue[i] = i;
381 else
382 sdata->vif.hw_queue[i] = 0;
383 }
384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
385 }
386
387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
388 {
389 struct ieee80211_sub_if_data *sdata;
390 int ret;
391
392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
393 return 0;
394
395 ASSERT_RTNL();
396
397 if (local->monitor_sdata)
398 return 0;
399
400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
401 if (!sdata)
402 return -ENOMEM;
403
404 /* set up data */
405 sdata->local = local;
406 sdata->vif.type = NL80211_IFTYPE_MONITOR;
407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
408 wiphy_name(local->hw.wiphy));
409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
410
411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
412
413 ieee80211_set_default_queues(sdata);
414
415 ret = drv_add_interface(local, sdata);
416 if (WARN_ON(ret)) {
417 /* ok .. stupid driver, it asked for this! */
418 kfree(sdata);
419 return ret;
420 }
421
422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
423 if (ret) {
424 kfree(sdata);
425 return ret;
426 }
427
428 mutex_lock(&local->iflist_mtx);
429 rcu_assign_pointer(local->monitor_sdata, sdata);
430 mutex_unlock(&local->iflist_mtx);
431
432 mutex_lock(&local->mtx);
433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
434 IEEE80211_CHANCTX_EXCLUSIVE);
435 mutex_unlock(&local->mtx);
436 if (ret) {
437 mutex_lock(&local->iflist_mtx);
438 RCU_INIT_POINTER(local->monitor_sdata, NULL);
439 mutex_unlock(&local->iflist_mtx);
440 synchronize_net();
441 drv_remove_interface(local, sdata);
442 kfree(sdata);
443 return ret;
444 }
445
446 skb_queue_head_init(&sdata->skb_queue);
447 INIT_WORK(&sdata->work, ieee80211_iface_work);
448
449 return 0;
450 }
451
452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
453 {
454 struct ieee80211_sub_if_data *sdata;
455
456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
457 return;
458
459 ASSERT_RTNL();
460
461 mutex_lock(&local->iflist_mtx);
462
463 sdata = rcu_dereference_protected(local->monitor_sdata,
464 lockdep_is_held(&local->iflist_mtx));
465 if (!sdata) {
466 mutex_unlock(&local->iflist_mtx);
467 return;
468 }
469
470 RCU_INIT_POINTER(local->monitor_sdata, NULL);
471 mutex_unlock(&local->iflist_mtx);
472
473 synchronize_net();
474
475 mutex_lock(&local->mtx);
476 ieee80211_vif_release_channel(sdata);
477 mutex_unlock(&local->mtx);
478
479 drv_remove_interface(local, sdata);
480
481 kfree(sdata);
482 }
483
484 /*
485 * NOTE: Be very careful when changing this function, it must NOT return
486 * an error on interface type changes that have been pre-checked, so most
487 * checks should be in ieee80211_check_concurrent_iface.
488 */
489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
490 {
491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
492 struct net_device *dev = wdev->netdev;
493 struct ieee80211_local *local = sdata->local;
494 struct sta_info *sta;
495 u32 changed = 0;
496 int res;
497 u32 hw_reconf_flags = 0;
498
499 switch (sdata->vif.type) {
500 case NL80211_IFTYPE_WDS:
501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
502 return -ENOLINK;
503 break;
504 case NL80211_IFTYPE_AP_VLAN: {
505 struct ieee80211_sub_if_data *master;
506
507 if (!sdata->bss)
508 return -ENOLINK;
509
510 mutex_lock(&local->mtx);
511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
512 mutex_unlock(&local->mtx);
513
514 master = container_of(sdata->bss,
515 struct ieee80211_sub_if_data, u.ap);
516 sdata->control_port_protocol =
517 master->control_port_protocol;
518 sdata->control_port_no_encrypt =
519 master->control_port_no_encrypt;
520 sdata->control_port_over_nl80211 =
521 master->control_port_over_nl80211;
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
777 static 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
793 static 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 * Stop TX on this interface first.
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 * Remove all stations associated with this interface.
841 *
842 * This must be done before calling ops->remove_interface()
843 * because otherwise we can later invoke ops->sta_notify()
844 * whenever the STAs are removed, and that invalidates driver
845 * assumptions about always getting a vif pointer that is valid
846 * (because if we remove a STA after ops->remove_interface()
847 * the driver will have removed the vif info already!)
848 *
849 * In WDS mode a station must exist here and be flushed, for
850 * AP_VLANs stations may exist since there's nothing else that
851 * would have removed them, but in other modes there shouldn't
852 * be any stations.
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 /* don't count this interface for allmulti while it is down */
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 /* APs need special treatment */
912 if (sdata->vif.type == NL80211_IFTYPE_AP) {
913 struct ieee80211_sub_if_data *vlan, *tmpsdata;
914
915 /* down all dependent devices, that is VLANs */
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 /* remove all packets in parent bc_buf pointing to this dev */
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 /* see comment in the default case below */
945 ieee80211_free_keys(sdata, true);
946 /* no need to tell driver */
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 /* clean all the functions */
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 /* relies on synchronize_rcu() below */
976 RCU_INIT_POINTER(local->p2p_sdata, NULL);
977 /* fall through */
978 default:
979 cancel_work_sync(&sdata->work);
980 /*
981 * When we get here, the interface is marked down.
982 * Free the remaining keys, if there are any
983 * (which can happen in AP mode if userspace sets
984 * keys before the interface is operating, and maybe
985 * also in WDS mode)
986 *
987 * Force the key freeing to always synchronize_net()
988 * to wait for the RX path in case it is using this
989 * interface enqueuing frames at this very time on
990 * another CPU.
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 sdata->vif.bss_conf.beacon_int = 0;
1017
1018 /*
1019 * If the interface goes down while suspended, presumably because
1020 * the device was unplugged and that happens before our resume,
1021 * then the driver is already unconfigured and the remainder of
1022 * this function isn't needed.
1023 * XXX: what about WoWLAN? If the device has software state, e.g.
1024 * memory allocated, it might expect teardown commands from
1025 * mac80211 here?
1026 */
1027 if (local->suspended) {
1028 WARN_ON(local->wowlan);
1029 WARN_ON(rtnl_dereference(local->monitor_sdata));
1030 return;
1031 }
1032
1033 switch (sdata->vif.type) {
1034 case NL80211_IFTYPE_AP_VLAN:
1035 break;
1036 case NL80211_IFTYPE_MONITOR:
1037 if (local->monitors == 0)
1038 ieee80211_del_virtual_monitor(local);
1039
1040 mutex_lock(&local->mtx);
1041 ieee80211_recalc_idle(local);
1042 mutex_unlock(&local->mtx);
1043
1044 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1045 break;
1046
1047 /* fall through */
1048 default:
1049 if (going_down)
1050 drv_remove_interface(local, sdata);
1051 }
1052
1053 ieee80211_recalc_ps(local);
1054
1055 if (cancel_scan)
1056 flush_delayed_work(&local->scan_work);
1057
1058 if (local->open_count == 0) {
1059 ieee80211_stop_device(local);
1060
1061 /* no reconfiguring after stop! */
1062 return;
1063 }
1064
1065 /* do after stop to avoid reconfiguring when we stop anyway */
1066 ieee80211_configure_filter(local);
1067 ieee80211_hw_config(local, hw_reconf_flags);
1068
1069 if (local->monitors == local->open_count)
1070 ieee80211_add_virtual_monitor(local);
1071 }
1072
1073 static int ieee80211_stop(struct net_device *dev)
1074 {
1075 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1076
1077 ieee80211_do_stop(sdata, true);
1078
1079 return 0;
1080 }
1081
1082 static void ieee80211_set_multicast_list(struct net_device *dev)
1083 {
1084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1085 struct ieee80211_local *local = sdata->local;
1086 int allmulti, sdata_allmulti;
1087
1088 allmulti = !!(dev->flags & IFF_ALLMULTI);
1089 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1090
1091 if (allmulti != sdata_allmulti) {
1092 if (dev->flags & IFF_ALLMULTI)
1093 atomic_inc(&local->iff_allmultis);
1094 else
1095 atomic_dec(&local->iff_allmultis);
1096 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1097 }
1098
1099 spin_lock_bh(&local->filter_lock);
1100 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1101 spin_unlock_bh(&local->filter_lock);
1102 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1103 }
1104
1105 /*
1106 * Called when the netdev is removed or, by the code below, before
1107 * the interface type changes.
1108 */
1109 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1110 {
1111 int i;
1112
1113 /* free extra data */
1114 ieee80211_free_keys(sdata, false);
1115
1116 ieee80211_debugfs_remove_netdev(sdata);
1117
1118 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1119 __skb_queue_purge(&sdata->fragments[i].skb_list);
1120 sdata->fragment_next = 0;
1121
1122 if (ieee80211_vif_is_mesh(&sdata->vif))
1123 ieee80211_mesh_teardown_sdata(sdata);
1124 }
1125
1126 static void ieee80211_uninit(struct net_device *dev)
1127 {
1128 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1129 }
1130
1131 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1132 struct sk_buff *skb,
1133 struct net_device *sb_dev)
1134 {
1135 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1136 }
1137
1138 static void
1139 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1140 {
1141 int i;
1142
1143 for_each_possible_cpu(i) {
1144 const struct pcpu_sw_netstats *tstats;
1145 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1146 unsigned int start;
1147
1148 tstats = per_cpu_ptr(dev->tstats, i);
1149
1150 do {
1151 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1152 rx_packets = tstats->rx_packets;
1153 tx_packets = tstats->tx_packets;
1154 rx_bytes = tstats->rx_bytes;
1155 tx_bytes = tstats->tx_bytes;
1156 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1157
1158 stats->rx_packets += rx_packets;
1159 stats->tx_packets += tx_packets;
1160 stats->rx_bytes += rx_bytes;
1161 stats->tx_bytes += tx_bytes;
1162 }
1163 }
1164
1165 static const struct net_device_ops ieee80211_dataif_ops = {
1166 .ndo_open = ieee80211_open,
1167 .ndo_stop = ieee80211_stop,
1168 .ndo_uninit = ieee80211_uninit,
1169 .ndo_start_xmit = ieee80211_subif_start_xmit,
1170 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1171 .ndo_set_mac_address = ieee80211_change_mac,
1172 .ndo_select_queue = ieee80211_netdev_select_queue,
1173 .ndo_get_stats64 = ieee80211_get_stats64,
1174 };
1175
1176 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1177 struct sk_buff *skb,
1178 struct net_device *sb_dev)
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 /* frame control */)
1190 return 0; /* doesn't matter, frame will be dropped */
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
1197 static 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
1208 static void ieee80211_if_free(struct net_device *dev)
1209 {
1210 free_percpu(dev->tstats);
1211 }
1212
1213 static 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
1222 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1223 {
1224 ieee80211_if_setup(dev);
1225 dev->features |= NETIF_F_LLTX;
1226 dev->priv_flags |= IFF_NO_QUEUE;
1227 }
1228
1229 static void ieee80211_iface_work(struct work_struct *work)
1230 {
1231 struct ieee80211_sub_if_data *sdata =
1232 container_of(work, struct ieee80211_sub_if_data, work);
1233 struct ieee80211_local *local = sdata->local;
1234 struct sk_buff *skb;
1235 struct sta_info *sta;
1236
1237 if (!ieee80211_sdata_running(sdata))
1238 return;
1239
1240 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1241 return;
1242
1243 if (!ieee80211_can_run_worker(local))
1244 return;
1245
1246 /* first process frames */
1247 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1248 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1249
1250 if (ieee80211_is_action(mgmt->frame_control) &&
1251 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1252 int len = skb->len;
1253
1254 mutex_lock(&local->sta_mtx);
1255 sta = sta_info_get_bss(sdata, mgmt->sa);
1256 if (sta) {
1257 switch (mgmt->u.action.u.addba_req.action_code) {
1258 case WLAN_ACTION_ADDBA_REQ:
1259 ieee80211_process_addba_request(
1260 local, sta, mgmt, len);
1261 break;
1262 case WLAN_ACTION_ADDBA_RESP:
1263 ieee80211_process_addba_resp(local, sta,
1264 mgmt, len);
1265 break;
1266 case WLAN_ACTION_DELBA:
1267 ieee80211_process_delba(sdata, sta,
1268 mgmt, len);
1269 break;
1270 default:
1271 WARN_ON(1);
1272 break;
1273 }
1274 }
1275 mutex_unlock(&local->sta_mtx);
1276 } else if (ieee80211_is_action(mgmt->frame_control) &&
1277 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1278 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1279 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1280 struct ieee80211_rx_status *status;
1281 enum nl80211_band band;
1282 u8 opmode;
1283
1284 status = IEEE80211_SKB_RXCB(skb);
1285 band = status->band;
1286 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1287
1288 mutex_lock(&local->sta_mtx);
1289 sta = sta_info_get_bss(sdata, mgmt->sa);
1290
1291 if (sta)
1292 ieee80211_vht_handle_opmode(sdata, sta,
1293 opmode,
1294 band);
1295
1296 mutex_unlock(&local->sta_mtx);
1297 break;
1298 }
1299 case WLAN_VHT_ACTION_GROUPID_MGMT:
1300 ieee80211_process_mu_groups(sdata, mgmt);
1301 break;
1302 default:
1303 WARN_ON(1);
1304 break;
1305 }
1306 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1307 struct ieee80211_hdr *hdr = (void *)mgmt;
1308 /*
1309 * So the frame isn't mgmt, but frame_control
1310 * is at the right place anyway, of course, so
1311 * the if statement is correct.
1312 *
1313 * Warn if we have other data frame types here,
1314 * they must not get here.
1315 */
1316 WARN_ON(hdr->frame_control &
1317 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1318 WARN_ON(!(hdr->seq_ctrl &
1319 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1320 /*
1321 * This was a fragment of a frame, received while
1322 * a block-ack session was active. That cannot be
1323 * right, so terminate the session.
1324 */
1325 mutex_lock(&local->sta_mtx);
1326 sta = sta_info_get_bss(sdata, mgmt->sa);
1327 if (sta) {
1328 u16 tid = ieee80211_get_tid(hdr);
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 /* then other type-dependent work */
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
1377 static 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 * Helper function to initialise an interface to a specific type.
1387 */
1388 static 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 /* clear type-dependent union */
1395 memset(&sdata->u, 0, sizeof(sdata->u));
1396
1397 /* and set some type-dependent values */
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 /* only monitor/p2p-device differ */
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 /* fall through */
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 /* fall through */
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 WARN_ON(1);
1478 break;
1479 }
1480
1481 ieee80211_debugfs_add_netdev(sdata);
1482 }
1483
1484 static 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 * Could maybe also all others here?
1504 * Just not sure how that interacts
1505 * with the RX/config path e.g. for
1506 * mesh.
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 * Could probably support everything
1520 * but WDS here (WDS do_open can fail
1521 * under memory pressure, which this
1522 * code isn't prepared to handle).
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 * Ignore return value here, there's not much we can do since
1551 * the driver changed the interface type internally already.
1552 * The warnings will hopefully make driver authors fix it :-)
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
1564 int 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 /* Purge and reset type-dependent state. */
1580 ieee80211_teardown_sdata(sdata);
1581 ieee80211_setup_sdata(sdata, type);
1582 }
1583
1584 /* reset some values that shouldn't be kept across type changes */
1585 if (type == NL80211_IFTYPE_STATION)
1586 sdata->u.mgd.use_4addr = false;
1587
1588 return 0;
1589 }
1590
1591 static 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 /* default ... something at least */
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 /* doesn't matter */
1612 break;
1613 case NL80211_IFTYPE_WDS:
1614 case NL80211_IFTYPE_AP_VLAN:
1615 /* match up with an AP interface */
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 /* keep default if no AP interface present */
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 /* fall through */
1637 default:
1638 /* assign a new address if possible -- try n_addresses first */
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 /* try mask if available */
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 /* not a contiguous mask ... not handled now! */
1669 pr_info("not contiguous\n");
1670 break;
1671 }
1672
1673 /*
1674 * Pick address of existing interface in case user changed
1675 * MAC address manually, default to perm_addr.
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
1724 int 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 (params->flags & MONITOR_FLAG_ACTIVE)))
1760 txq_size += sizeof(struct txq_info) +
1761 local->hw.txq_data_size;
1762
1763 if (local->ops->wake_tx_queue) {
1764 if_setup = ieee80211_if_setup_no_queue;
1765 } else {
1766 if_setup = ieee80211_if_setup;
1767 if (local->hw.queues >= IEEE80211_NUM_ACS)
1768 txqs = IEEE80211_NUM_ACS;
1769 }
1770
1771 ndev = alloc_netdev_mqs(size + txq_size,
1772 name, name_assign_type,
1773 if_setup, txqs, 1);
1774 if (!ndev)
1775 return -ENOMEM;
1776 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1777
1778 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1779 if (!ndev->tstats) {
1780 free_netdev(ndev);
1781 return -ENOMEM;
1782 }
1783
1784 ndev->needed_headroom = local->tx_headroom +
1785 4*6 /* four MAC addresses */
1786 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1787 + 6 /* mesh */
1788 + 8 /* rfc1042/bridge tunnel */
1789 - ETH_HLEN /* ethernet hard_header_len */
1790 + IEEE80211_ENCRYPT_HEADROOM;
1791 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1792
1793 ret = dev_alloc_name(ndev, ndev->name);
1794 if (ret < 0) {
1795 ieee80211_if_free(ndev);
1796 free_netdev(ndev);
1797 return ret;
1798 }
1799
1800 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1801 if (is_valid_ether_addr(params->macaddr))
1802 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1803 else
1804 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1805 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1806
1807 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1808 sdata = netdev_priv(ndev);
1809 ndev->ieee80211_ptr = &sdata->wdev;
1810 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1811 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1812
1813 if (txq_size) {
1814 txqi = netdev_priv(ndev) + size;
1815 ieee80211_txq_init(sdata, NULL, txqi, 0);
1816 }
1817
1818 sdata->dev = ndev;
1819 }
1820
1821 /* initialise type-independent data */
1822 sdata->wdev.wiphy = local->hw.wiphy;
1823 sdata->local = local;
1824
1825 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1826 skb_queue_head_init(&sdata->fragments[i].skb_list);
1827
1828 INIT_LIST_HEAD(&sdata->key_list);
1829
1830 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1831 ieee80211_dfs_cac_timer_work);
1832 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1833 ieee80211_delayed_tailroom_dec);
1834
1835 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1836 struct ieee80211_supported_band *sband;
1837 sband = local->hw.wiphy->bands[i];
1838 sdata->rc_rateidx_mask[i] =
1839 sband ? (1 << sband->n_bitrates) - 1 : 0;
1840 if (sband) {
1841 __le16 cap;
1842 u16 *vht_rate_mask;
1843
1844 memcpy(sdata->rc_rateidx_mcs_mask[i],
1845 sband->ht_cap.mcs.rx_mask,
1846 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1847
1848 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1849 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1850 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1851 } else {
1852 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1853 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1854 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1855 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1856 }
1857 }
1858
1859 ieee80211_set_default_queues(sdata);
1860
1861 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1862 sdata->user_power_level = local->user_power_level;
1863
1864 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1865
1866 /* setup type-dependent data */
1867 ieee80211_setup_sdata(sdata, type);
1868
1869 if (ndev) {
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 ndev->features |= local->hw.netdev_features;
1875
1876 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1877
1878 /* MTU range: 256 - 2304 */
1879 ndev->min_mtu = 256;
1880 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1881
1882 ret = register_netdevice(ndev);
1883 if (ret) {
1884 free_netdev(ndev);
1885 return ret;
1886 }
1887 }
1888
1889 mutex_lock(&local->iflist_mtx);
1890 list_add_tail_rcu(&sdata->list, &local->interfaces);
1891 mutex_unlock(&local->iflist_mtx);
1892
1893 if (new_wdev)
1894 *new_wdev = &sdata->wdev;
1895
1896 return 0;
1897 }
1898
1899 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1900 {
1901 ASSERT_RTNL();
1902
1903 mutex_lock(&sdata->local->iflist_mtx);
1904 list_del_rcu(&sdata->list);
1905 mutex_unlock(&sdata->local->iflist_mtx);
1906
1907 if (sdata->vif.txq)
1908 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1909
1910 synchronize_rcu();
1911
1912 if (sdata->dev) {
1913 unregister_netdevice(sdata->dev);
1914 } else {
1915 cfg80211_unregister_wdev(&sdata->wdev);
1916 ieee80211_teardown_sdata(sdata);
1917 kfree(sdata);
1918 }
1919 }
1920
1921 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1922 {
1923 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1924 return;
1925 ieee80211_do_stop(sdata, true);
1926 }
1927
1928 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1929 {
1930 struct ieee80211_sub_if_data *sdata, *tmp;
1931 LIST_HEAD(unreg_list);
1932 LIST_HEAD(wdev_list);
1933
1934 ASSERT_RTNL();
1935
1936 /* Before destroying the interfaces, make sure they're all stopped so
1937 * that the hardware is stopped. Otherwise, the driver might still be
1938 * iterating the interfaces during the shutdown, e.g. from a worker
1939 * or from RX processing or similar, and if it does so (using atomic
1940 * iteration) while we're manipulating the list, the iteration will
1941 * crash.
1942 *
1943 * After this, the hardware should be stopped and the driver should
1944 * have stopped all of its activities, so that we can do RCU-unaware
1945 * manipulations of the interface list below.
1946 */
1947 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1948
1949 WARN(local->open_count, "%s: open count remains %d\n",
1950 wiphy_name(local->hw.wiphy), local->open_count);
1951
1952 ieee80211_txq_teardown_flows(local);
1953
1954 mutex_lock(&local->iflist_mtx);
1955 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1956 list_del(&sdata->list);
1957
1958 if (sdata->dev)
1959 unregister_netdevice_queue(sdata->dev, &unreg_list);
1960 else
1961 list_add(&sdata->list, &wdev_list);
1962 }
1963 mutex_unlock(&local->iflist_mtx);
1964 unregister_netdevice_many(&unreg_list);
1965
1966 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1967 list_del(&sdata->list);
1968 cfg80211_unregister_wdev(&sdata->wdev);
1969 kfree(sdata);
1970 }
1971 }
1972
1973 static int netdev_notify(struct notifier_block *nb,
1974 unsigned long state, void *ptr)
1975 {
1976 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1977 struct ieee80211_sub_if_data *sdata;
1978
1979 if (state != NETDEV_CHANGENAME)
1980 return NOTIFY_DONE;
1981
1982 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1983 return NOTIFY_DONE;
1984
1985 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1986 return NOTIFY_DONE;
1987
1988 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1989 memcpy(sdata->name, dev->name, IFNAMSIZ);
1990 ieee80211_debugfs_rename_netdev(sdata);
1991
1992 return NOTIFY_OK;
1993 }
1994
1995 static struct notifier_block mac80211_netdev_notifier = {
1996 .notifier_call = netdev_notify,
1997 };
1998
1999 int ieee80211_iface_init(void)
2000 {
2001 return register_netdevice_notifier(&mac80211_netdev_notifier);
2002 }
2003
2004 void ieee80211_iface_exit(void)
2005 {
2006 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2007 }
2008
2009 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2010 {
2011 if (sdata->vif.type == NL80211_IFTYPE_AP)
2012 atomic_inc(&sdata->u.ap.num_mcast_sta);
2013 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2014 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2015 }
2016
2017 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2018 {
2019 if (sdata->vif.type == NL80211_IFTYPE_AP)
2020 atomic_dec(&sdata->u.ap.num_mcast_sta);
2021 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2022 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2023 }
Linux with added FPC-III support