blob: e49b80a9de520038baa83a2c2d0e77803bfc5bd9 [file] [log] [blame]
b.liue9582032025-04-17 19:18:16 +08001// 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) 2018-2021 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
45static void ieee80211_iface_work(struct work_struct *work);
46
47bool __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
77void 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
85static 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
94static 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
105static 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
140u32 ieee80211_idle_off(struct ieee80211_local *local)
141{
142 return __ieee80211_recalc_idle(local, true);
143}
144
145void 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
152static 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
201static 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
227static 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
243static 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
314static 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
351void 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
371static 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
387int 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
452void 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 */
489int 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
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_local *local = sdata->local;
797 unsigned long flags;
798 struct sk_buff_head freeq;
799 struct sk_buff *skb, *tmp;
800 u32 hw_reconf_flags = 0;
801 int i, flushed;
802 struct ps_data *ps;
803 struct cfg80211_chan_def chandef;
804 bool cancel_scan;
805 struct cfg80211_nan_func *func;
806
807 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
808
809 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
810 if (cancel_scan)
811 ieee80211_scan_cancel(local);
812
813 /*
814 * Stop TX on this interface first.
815 */
816 if (sdata->dev)
817 netif_tx_stop_all_queues(sdata->dev);
818
819 ieee80211_roc_purge(local, sdata);
820
821 switch (sdata->vif.type) {
822 case NL80211_IFTYPE_STATION:
823 ieee80211_mgd_stop(sdata);
824 break;
825 case NL80211_IFTYPE_ADHOC:
826 ieee80211_ibss_stop(sdata);
827 break;
828 case NL80211_IFTYPE_AP:
829 cancel_work_sync(&sdata->u.ap.request_smps_work);
830 break;
831 case NL80211_IFTYPE_MONITOR:
832 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
833 break;
834 list_del_rcu(&sdata->u.mntr.list);
835 break;
836 default:
837 break;
838 }
839
840 /*
841 * Remove all stations associated with this interface.
842 *
843 * This must be done before calling ops->remove_interface()
844 * because otherwise we can later invoke ops->sta_notify()
845 * whenever the STAs are removed, and that invalidates driver
846 * assumptions about always getting a vif pointer that is valid
847 * (because if we remove a STA after ops->remove_interface()
848 * the driver will have removed the vif info already!)
849 *
850 * In WDS mode a station must exist here and be flushed, for
851 * AP_VLANs stations may exist since there's nothing else that
852 * would have removed them, but in other modes there shouldn't
853 * be any stations.
854 */
855 flushed = sta_info_flush(sdata);
856 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
857 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
858 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
859
860 /* don't count this interface for allmulti while it is down */
861 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
862 atomic_dec(&local->iff_allmultis);
863
864 if (sdata->vif.type == NL80211_IFTYPE_AP) {
865 local->fif_pspoll--;
866 local->fif_probe_req--;
867 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
868 local->fif_probe_req--;
869 }
870
871 if (sdata->dev) {
872 netif_addr_lock_bh(sdata->dev);
873 spin_lock_bh(&local->filter_lock);
874 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
875 sdata->dev->addr_len);
876 spin_unlock_bh(&local->filter_lock);
877 netif_addr_unlock_bh(sdata->dev);
878 }
879
880 del_timer_sync(&local->dynamic_ps_timer);
881 cancel_work_sync(&local->dynamic_ps_enable_work);
882
883 cancel_work_sync(&sdata->recalc_smps);
884 sdata_lock(sdata);
885 mutex_lock(&local->mtx);
886 sdata->vif.csa_active = false;
887 if (sdata->vif.type == NL80211_IFTYPE_STATION)
888 sdata->u.mgd.csa_waiting_bcn = false;
889 if (sdata->csa_block_tx) {
890 ieee80211_wake_vif_queues(local, sdata,
891 IEEE80211_QUEUE_STOP_REASON_CSA);
892 sdata->csa_block_tx = false;
893 }
894 mutex_unlock(&local->mtx);
895 sdata_unlock(sdata);
896
897 cancel_work_sync(&sdata->csa_finalize_work);
898
899 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
900
901 if (sdata->wdev.cac_started) {
902 chandef = sdata->vif.bss_conf.chandef;
903 WARN_ON(local->suspended);
904 mutex_lock(&local->mtx);
905 ieee80211_vif_release_channel(sdata);
906 mutex_unlock(&local->mtx);
907 cfg80211_cac_event(sdata->dev, &chandef,
908 NL80211_RADAR_CAC_ABORTED,
909 GFP_KERNEL);
910 }
911
912 /* APs need special treatment */
913 if (sdata->vif.type == NL80211_IFTYPE_AP) {
914 struct ieee80211_sub_if_data *vlan, *tmpsdata;
915
916 /* down all dependent devices, that is VLANs */
917 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
918 u.vlan.list)
919 dev_close(vlan->dev);
920 WARN_ON(!list_empty(&sdata->u.ap.vlans));
921 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
922 /* remove all packets in parent bc_buf pointing to this dev */
923 ps = &sdata->bss->ps;
924
925 spin_lock_irqsave(&ps->bc_buf.lock, flags);
926 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
927 if (skb->dev == sdata->dev) {
928 __skb_unlink(skb, &ps->bc_buf);
929 local->total_ps_buffered--;
930 ieee80211_free_txskb(&local->hw, skb);
931 }
932 }
933 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
934 }
935
936 if (going_down)
937 local->open_count--;
938
939 switch (sdata->vif.type) {
940 case NL80211_IFTYPE_AP_VLAN:
941 mutex_lock(&local->mtx);
942 list_del(&sdata->u.vlan.list);
943 mutex_unlock(&local->mtx);
944 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
945 /* see comment in the default case below */
946 ieee80211_free_keys(sdata, true);
947 /* no need to tell driver */
948 break;
949 case NL80211_IFTYPE_MONITOR:
950 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
951 local->cooked_mntrs--;
952 break;
953 }
954
955 local->monitors--;
956 if (local->monitors == 0) {
957 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
958 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
959 }
960
961 ieee80211_adjust_monitor_flags(sdata, -1);
962 break;
963 case NL80211_IFTYPE_NAN:
964 /* clean all the functions */
965 spin_lock_bh(&sdata->u.nan.func_lock);
966
967 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
968 idr_remove(&sdata->u.nan.function_inst_ids, i);
969 cfg80211_free_nan_func(func);
970 }
971 idr_destroy(&sdata->u.nan.function_inst_ids);
972
973 spin_unlock_bh(&sdata->u.nan.func_lock);
974 break;
975 case NL80211_IFTYPE_P2P_DEVICE:
976 /* relies on synchronize_rcu() below */
977 RCU_INIT_POINTER(local->p2p_sdata, NULL);
978 /* fall through */
979 default:
980 cancel_work_sync(&sdata->work);
981 /*
982 * When we get here, the interface is marked down.
983 * Free the remaining keys, if there are any
984 * (which can happen in AP mode if userspace sets
985 * keys before the interface is operating, and maybe
986 * also in WDS mode)
987 *
988 * Force the key freeing to always synchronize_net()
989 * to wait for the RX path in case it is using this
990 * interface enqueuing frames at this very time on
991 * another CPU.
992 */
993 ieee80211_free_keys(sdata, true);
994 skb_queue_purge(&sdata->skb_queue);
995 }
996
997 /*
998 * Since ieee80211_free_txskb() may issue __dev_queue_xmit()
999 * which should be called with interrupts enabled, reclamation
1000 * is done in two phases:
1001 */
1002 __skb_queue_head_init(&freeq);
1003
1004 /* unlink from local queues... */
1005 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1006 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1007 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1008 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1009 if (info->control.vif == &sdata->vif) {
1010 __skb_unlink(skb, &local->pending[i]);
1011 __skb_queue_tail(&freeq, skb);
1012 }
1013 }
1014 }
1015 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1016
1017 /* ... and perform actual reclamation with interrupts enabled. */
1018 skb_queue_walk_safe(&freeq, skb, tmp) {
1019 __skb_unlink(skb, &freeq);
1020 ieee80211_free_txskb(&local->hw, skb);
1021 }
1022
1023 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1024 ieee80211_txq_remove_vlan(local, sdata);
1025
1026 sdata->bss = NULL;
1027
1028 if (local->open_count == 0)
1029 ieee80211_clear_tx_pending(local);
1030
1031 sdata->vif.bss_conf.beacon_int = 0;
1032
1033 /*
1034 * If the interface goes down while suspended, presumably because
1035 * the device was unplugged and that happens before our resume,
1036 * then the driver is already unconfigured and the remainder of
1037 * this function isn't needed.
1038 * XXX: what about WoWLAN? If the device has software state, e.g.
1039 * memory allocated, it might expect teardown commands from
1040 * mac80211 here?
1041 */
1042 if (local->suspended) {
1043 WARN_ON(local->wowlan);
1044 WARN_ON(rtnl_dereference(local->monitor_sdata));
1045 return;
1046 }
1047
1048 switch (sdata->vif.type) {
1049 case NL80211_IFTYPE_AP_VLAN:
1050 break;
1051 case NL80211_IFTYPE_MONITOR:
1052 if (local->monitors == 0)
1053 ieee80211_del_virtual_monitor(local);
1054
1055 mutex_lock(&local->mtx);
1056 ieee80211_recalc_idle(local);
1057 mutex_unlock(&local->mtx);
1058
1059 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1060 break;
1061
1062 /* fall through */
1063 default:
1064 if (going_down)
1065 drv_remove_interface(local, sdata);
1066 }
1067
1068 ieee80211_recalc_ps(local);
1069
1070 if (cancel_scan)
1071 flush_delayed_work(&local->scan_work);
1072
1073 if (local->open_count == 0) {
1074 ieee80211_stop_device(local);
1075
1076 /* no reconfiguring after stop! */
1077 return;
1078 }
1079
1080 /* do after stop to avoid reconfiguring when we stop anyway */
1081 ieee80211_configure_filter(local);
1082 ieee80211_hw_config(local, hw_reconf_flags);
1083
1084 if (local->monitors == local->open_count)
1085 ieee80211_add_virtual_monitor(local);
1086}
1087
1088static int ieee80211_stop(struct net_device *dev)
1089{
1090 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1091
1092 ieee80211_do_stop(sdata, true);
1093
1094 return 0;
1095}
1096
1097static void ieee80211_set_multicast_list(struct net_device *dev)
1098{
1099 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1100 struct ieee80211_local *local = sdata->local;
1101 int allmulti, sdata_allmulti;
1102
1103 allmulti = !!(dev->flags & IFF_ALLMULTI);
1104 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1105
1106 if (allmulti != sdata_allmulti) {
1107 if (dev->flags & IFF_ALLMULTI)
1108 atomic_inc(&local->iff_allmultis);
1109 else
1110 atomic_dec(&local->iff_allmultis);
1111 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1112 }
1113
1114 spin_lock_bh(&local->filter_lock);
1115 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1116 spin_unlock_bh(&local->filter_lock);
1117 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1118}
1119
1120/*
1121 * Called when the netdev is removed or, by the code below, before
1122 * the interface type changes.
1123 */
1124static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1125{
1126 /* free extra data */
1127 ieee80211_free_keys(sdata, false);
1128
1129 ieee80211_debugfs_remove_netdev(sdata);
1130
1131 ieee80211_destroy_frag_cache(&sdata->frags);
1132
1133 if (ieee80211_vif_is_mesh(&sdata->vif))
1134 ieee80211_mesh_teardown_sdata(sdata);
1135}
1136
1137static void ieee80211_uninit(struct net_device *dev)
1138{
1139 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1140}
1141
1142static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1143 struct sk_buff *skb,
1144 struct net_device *sb_dev)
1145{
1146 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1147}
1148
1149static void
1150ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1151{
1152 int i;
1153
1154 for_each_possible_cpu(i) {
1155 const struct pcpu_sw_netstats *tstats;
1156 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1157 unsigned int start;
1158
1159 tstats = per_cpu_ptr(dev->tstats, i);
1160
1161 do {
1162 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1163 rx_packets = tstats->rx_packets;
1164 tx_packets = tstats->tx_packets;
1165 rx_bytes = tstats->rx_bytes;
1166 tx_bytes = tstats->tx_bytes;
1167 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1168
1169 stats->rx_packets += rx_packets;
1170 stats->tx_packets += tx_packets;
1171 stats->rx_bytes += rx_bytes;
1172 stats->tx_bytes += tx_bytes;
1173 }
1174}
1175
1176static const struct net_device_ops ieee80211_dataif_ops = {
1177 .ndo_open = ieee80211_open,
1178 .ndo_stop = ieee80211_stop,
1179 .ndo_uninit = ieee80211_uninit,
1180 .ndo_start_xmit = ieee80211_subif_start_xmit,
1181 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1182 .ndo_set_mac_address = ieee80211_change_mac,
1183 .ndo_select_queue = ieee80211_netdev_select_queue,
1184 .ndo_get_stats64 = ieee80211_get_stats64,
1185};
1186
1187static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1188 struct sk_buff *skb,
1189 struct net_device *sb_dev)
1190{
1191 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1192 struct ieee80211_local *local = sdata->local;
1193 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1194 struct ieee80211_hdr *hdr;
1195 int len_rthdr;
1196
1197 if (local->hw.queues < IEEE80211_NUM_ACS)
1198 return 0;
1199
1200 /* reset flags and info before parsing radiotap header */
1201 memset(info, 0, sizeof(*info));
1202
1203 if (!ieee80211_parse_tx_radiotap(skb, dev))
1204 return 0; /* doesn't matter, frame will be dropped */
1205
1206 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1207 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1208 if (skb->len < len_rthdr + 2 ||
1209 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
1210 return 0; /* doesn't matter, frame will be dropped */
1211
1212 return ieee80211_select_queue_80211(sdata, skb, hdr);
1213}
1214
1215static const struct net_device_ops ieee80211_monitorif_ops = {
1216 .ndo_open = ieee80211_open,
1217 .ndo_stop = ieee80211_stop,
1218 .ndo_uninit = ieee80211_uninit,
1219 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1220 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1221 .ndo_set_mac_address = ieee80211_change_mac,
1222 .ndo_select_queue = ieee80211_monitor_select_queue,
1223 .ndo_get_stats64 = ieee80211_get_stats64,
1224};
1225
1226static void ieee80211_if_free(struct net_device *dev)
1227{
1228 free_percpu(dev->tstats);
1229}
1230
1231static void ieee80211_if_setup(struct net_device *dev)
1232{
1233 ether_setup(dev);
1234 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1235 dev->netdev_ops = &ieee80211_dataif_ops;
1236 dev->needs_free_netdev = true;
1237 dev->priv_destructor = ieee80211_if_free;
1238}
1239
1240static void ieee80211_if_setup_no_queue(struct net_device *dev)
1241{
1242 ieee80211_if_setup(dev);
1243 dev->priv_flags |= IFF_NO_QUEUE;
1244}
1245
1246static void ieee80211_iface_work(struct work_struct *work)
1247{
1248 struct ieee80211_sub_if_data *sdata =
1249 container_of(work, struct ieee80211_sub_if_data, work);
1250 struct ieee80211_local *local = sdata->local;
1251 struct sk_buff *skb;
1252 struct sta_info *sta;
1253
1254 if (!ieee80211_sdata_running(sdata))
1255 return;
1256
1257 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1258 return;
1259
1260 if (!ieee80211_can_run_worker(local))
1261 return;
1262
1263 /* first process frames */
1264 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1265 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1266
1267 if (ieee80211_is_action(mgmt->frame_control) &&
1268 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1269 int len = skb->len;
1270
1271 mutex_lock(&local->sta_mtx);
1272 sta = sta_info_get_bss(sdata, mgmt->sa);
1273 if (sta) {
1274 switch (mgmt->u.action.u.addba_req.action_code) {
1275 case WLAN_ACTION_ADDBA_REQ:
1276 ieee80211_process_addba_request(
1277 local, sta, mgmt, len);
1278 break;
1279 case WLAN_ACTION_ADDBA_RESP:
1280 ieee80211_process_addba_resp(local, sta,
1281 mgmt, len);
1282 break;
1283 case WLAN_ACTION_DELBA:
1284 ieee80211_process_delba(sdata, sta,
1285 mgmt, len);
1286 break;
1287 default:
1288 WARN_ON(1);
1289 break;
1290 }
1291 }
1292 mutex_unlock(&local->sta_mtx);
1293 } else if (ieee80211_is_action(mgmt->frame_control) &&
1294 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1295 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1296 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1297 struct ieee80211_rx_status *status;
1298 enum nl80211_band band;
1299 u8 opmode;
1300
1301 status = IEEE80211_SKB_RXCB(skb);
1302 band = status->band;
1303 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1304
1305 mutex_lock(&local->sta_mtx);
1306 sta = sta_info_get_bss(sdata, mgmt->sa);
1307
1308 if (sta)
1309 ieee80211_vht_handle_opmode(sdata, sta,
1310 opmode,
1311 band);
1312
1313 mutex_unlock(&local->sta_mtx);
1314 break;
1315 }
1316 case WLAN_VHT_ACTION_GROUPID_MGMT:
1317 ieee80211_process_mu_groups(sdata, mgmt);
1318 break;
1319 default:
1320 WARN_ON(1);
1321 break;
1322 }
1323 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1324 struct ieee80211_hdr *hdr = (void *)mgmt;
1325 /*
1326 * So the frame isn't mgmt, but frame_control
1327 * is at the right place anyway, of course, so
1328 * the if statement is correct.
1329 *
1330 * Warn if we have other data frame types here,
1331 * they must not get here.
1332 */
1333 WARN_ON(hdr->frame_control &
1334 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1335 WARN_ON(!(hdr->seq_ctrl &
1336 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1337 /*
1338 * This was a fragment of a frame, received while
1339 * a block-ack session was active. That cannot be
1340 * right, so terminate the session.
1341 */
1342 mutex_lock(&local->sta_mtx);
1343 sta = sta_info_get_bss(sdata, mgmt->sa);
1344 if (sta) {
1345 u16 tid = ieee80211_get_tid(hdr);
1346
1347 __ieee80211_stop_rx_ba_session(
1348 sta, tid, WLAN_BACK_RECIPIENT,
1349 WLAN_REASON_QSTA_REQUIRE_SETUP,
1350 true);
1351 }
1352 mutex_unlock(&local->sta_mtx);
1353 } else switch (sdata->vif.type) {
1354 case NL80211_IFTYPE_STATION:
1355 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1356 break;
1357 case NL80211_IFTYPE_ADHOC:
1358 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1359 break;
1360 case NL80211_IFTYPE_MESH_POINT:
1361 if (!ieee80211_vif_is_mesh(&sdata->vif))
1362 break;
1363 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1364 break;
1365 default:
1366 WARN(1, "frame for unexpected interface type");
1367 break;
1368 }
1369
1370 kfree_skb(skb);
1371 }
1372
1373 /* then other type-dependent work */
1374 switch (sdata->vif.type) {
1375 case NL80211_IFTYPE_STATION:
1376 ieee80211_sta_work(sdata);
1377 break;
1378 case NL80211_IFTYPE_ADHOC:
1379 ieee80211_ibss_work(sdata);
1380 break;
1381 case NL80211_IFTYPE_MESH_POINT:
1382 if (!ieee80211_vif_is_mesh(&sdata->vif))
1383 break;
1384 ieee80211_mesh_work(sdata);
1385 break;
1386 case NL80211_IFTYPE_OCB:
1387 ieee80211_ocb_work(sdata);
1388 break;
1389 default:
1390 break;
1391 }
1392}
1393
1394static void ieee80211_recalc_smps_work(struct work_struct *work)
1395{
1396 struct ieee80211_sub_if_data *sdata =
1397 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1398
1399 ieee80211_recalc_smps(sdata);
1400}
1401
1402/*
1403 * Helper function to initialise an interface to a specific type.
1404 */
1405static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1406 enum nl80211_iftype type)
1407{
1408 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1409 0xff, 0xff, 0xff};
1410
1411 /* clear type-dependent union */
1412 memset(&sdata->u, 0, sizeof(sdata->u));
1413
1414 /* and set some type-dependent values */
1415 sdata->vif.type = type;
1416 sdata->vif.p2p = false;
1417 sdata->wdev.iftype = type;
1418
1419 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1420 sdata->control_port_no_encrypt = false;
1421 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1422 sdata->vif.bss_conf.idle = true;
1423
1424 sdata->noack_map = 0;
1425
1426 /* only monitor/p2p-device differ */
1427 if (sdata->dev) {
1428 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1429 sdata->dev->type = ARPHRD_ETHER;
1430 }
1431
1432 skb_queue_head_init(&sdata->skb_queue);
1433 INIT_WORK(&sdata->work, ieee80211_iface_work);
1434 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1435 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1436 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1437 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1438
1439 switch (type) {
1440 case NL80211_IFTYPE_P2P_GO:
1441 type = NL80211_IFTYPE_AP;
1442 sdata->vif.type = type;
1443 sdata->vif.p2p = true;
1444 /* fall through */
1445 case NL80211_IFTYPE_AP:
1446 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1447 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1448 INIT_WORK(&sdata->u.ap.request_smps_work,
1449 ieee80211_request_smps_ap_work);
1450 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1451 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1452 break;
1453 case NL80211_IFTYPE_P2P_CLIENT:
1454 type = NL80211_IFTYPE_STATION;
1455 sdata->vif.type = type;
1456 sdata->vif.p2p = true;
1457 /* fall through */
1458 case NL80211_IFTYPE_STATION:
1459 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1460 ieee80211_sta_setup_sdata(sdata);
1461 break;
1462 case NL80211_IFTYPE_OCB:
1463 sdata->vif.bss_conf.bssid = bssid_wildcard;
1464 ieee80211_ocb_setup_sdata(sdata);
1465 break;
1466 case NL80211_IFTYPE_ADHOC:
1467 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1468 ieee80211_ibss_setup_sdata(sdata);
1469 break;
1470 case NL80211_IFTYPE_MESH_POINT:
1471 if (ieee80211_vif_is_mesh(&sdata->vif))
1472 ieee80211_mesh_init_sdata(sdata);
1473 break;
1474 case NL80211_IFTYPE_MONITOR:
1475 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1476 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1477 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1478 MONITOR_FLAG_OTHER_BSS;
1479 break;
1480 case NL80211_IFTYPE_WDS:
1481 sdata->vif.bss_conf.bssid = NULL;
1482 break;
1483 case NL80211_IFTYPE_NAN:
1484 idr_init(&sdata->u.nan.function_inst_ids);
1485 spin_lock_init(&sdata->u.nan.func_lock);
1486 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1487 break;
1488 case NL80211_IFTYPE_AP_VLAN:
1489 case NL80211_IFTYPE_P2P_DEVICE:
1490 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1491 break;
1492 case NL80211_IFTYPE_UNSPECIFIED:
1493 case NUM_NL80211_IFTYPES:
1494 WARN_ON(1);
1495 break;
1496 }
1497
1498 ieee80211_debugfs_add_netdev(sdata);
1499}
1500
1501static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1502 enum nl80211_iftype type)
1503{
1504 struct ieee80211_local *local = sdata->local;
1505 int ret, err;
1506 enum nl80211_iftype internal_type = type;
1507 bool p2p = false;
1508
1509 ASSERT_RTNL();
1510
1511 if (!local->ops->change_interface)
1512 return -EBUSY;
1513
1514 switch (sdata->vif.type) {
1515 case NL80211_IFTYPE_AP:
1516 case NL80211_IFTYPE_STATION:
1517 case NL80211_IFTYPE_ADHOC:
1518 case NL80211_IFTYPE_OCB:
1519 /*
1520 * Could maybe also all others here?
1521 * Just not sure how that interacts
1522 * with the RX/config path e.g. for
1523 * mesh.
1524 */
1525 break;
1526 default:
1527 return -EBUSY;
1528 }
1529
1530 switch (type) {
1531 case NL80211_IFTYPE_AP:
1532 case NL80211_IFTYPE_STATION:
1533 case NL80211_IFTYPE_ADHOC:
1534 case NL80211_IFTYPE_OCB:
1535 /*
1536 * Could probably support everything
1537 * but WDS here (WDS do_open can fail
1538 * under memory pressure, which this
1539 * code isn't prepared to handle).
1540 */
1541 break;
1542 case NL80211_IFTYPE_P2P_CLIENT:
1543 p2p = true;
1544 internal_type = NL80211_IFTYPE_STATION;
1545 break;
1546 case NL80211_IFTYPE_P2P_GO:
1547 p2p = true;
1548 internal_type = NL80211_IFTYPE_AP;
1549 break;
1550 default:
1551 return -EBUSY;
1552 }
1553
1554 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1555 if (ret)
1556 return ret;
1557
1558 ieee80211_stop_vif_queues(local, sdata,
1559 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1560 synchronize_net();
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 ieee80211_wake_vif_queues(local, sdata,
1583 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1584 return ret;
1585}
1586
1587int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1588 enum nl80211_iftype type)
1589{
1590 int ret;
1591
1592 ASSERT_RTNL();
1593
1594 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1595 return 0;
1596
1597 if (ieee80211_sdata_running(sdata)) {
1598 ret = ieee80211_runtime_change_iftype(sdata, type);
1599 if (ret)
1600 return ret;
1601 } else {
1602 /* Purge and reset type-dependent state. */
1603 ieee80211_teardown_sdata(sdata);
1604 ieee80211_setup_sdata(sdata, type);
1605 }
1606
1607 /* reset some values that shouldn't be kept across type changes */
1608 if (type == NL80211_IFTYPE_STATION)
1609 sdata->u.mgd.use_4addr = false;
1610
1611 return 0;
1612}
1613
1614static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1615 u8 *perm_addr, enum nl80211_iftype type)
1616{
1617 struct ieee80211_sub_if_data *sdata;
1618 u64 mask, start, addr, val, inc;
1619 u8 *m;
1620 u8 tmp_addr[ETH_ALEN];
1621 int i;
1622
1623 /* default ... something at least */
1624 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1625
1626 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1627 local->hw.wiphy->n_addresses <= 1)
1628 return;
1629
1630 mutex_lock(&local->iflist_mtx);
1631
1632 switch (type) {
1633 case NL80211_IFTYPE_MONITOR:
1634 /* doesn't matter */
1635 break;
1636 case NL80211_IFTYPE_WDS:
1637 case NL80211_IFTYPE_AP_VLAN:
1638 /* match up with an AP interface */
1639 list_for_each_entry(sdata, &local->interfaces, list) {
1640 if (sdata->vif.type != NL80211_IFTYPE_AP)
1641 continue;
1642 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1643 break;
1644 }
1645 /* keep default if no AP interface present */
1646 break;
1647 case NL80211_IFTYPE_P2P_CLIENT:
1648 case NL80211_IFTYPE_P2P_GO:
1649 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1650 list_for_each_entry(sdata, &local->interfaces, list) {
1651 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1652 continue;
1653 if (!ieee80211_sdata_running(sdata))
1654 continue;
1655 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1656 goto out_unlock;
1657 }
1658 }
1659 /* fall through */
1660 default:
1661 /* assign a new address if possible -- try n_addresses first */
1662 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1663 bool used = false;
1664
1665 list_for_each_entry(sdata, &local->interfaces, list) {
1666 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1667 sdata->vif.addr)) {
1668 used = true;
1669 break;
1670 }
1671 }
1672
1673 if (!used) {
1674 memcpy(perm_addr,
1675 local->hw.wiphy->addresses[i].addr,
1676 ETH_ALEN);
1677 break;
1678 }
1679 }
1680
1681 /* try mask if available */
1682 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1683 break;
1684
1685 m = local->hw.wiphy->addr_mask;
1686 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1687 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1688 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1689
1690 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1691 /* not a contiguous mask ... not handled now! */
1692 pr_info("not contiguous\n");
1693 break;
1694 }
1695
1696 /*
1697 * Pick address of existing interface in case user changed
1698 * MAC address manually, default to perm_addr.
1699 */
1700 m = local->hw.wiphy->perm_addr;
1701 list_for_each_entry(sdata, &local->interfaces, list) {
1702 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1703 continue;
1704 m = sdata->vif.addr;
1705 break;
1706 }
1707 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1708 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1709 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1710
1711 inc = 1ULL<<__ffs64(mask);
1712 val = (start & mask);
1713 addr = (start & ~mask) | (val & mask);
1714 do {
1715 bool used = false;
1716
1717 tmp_addr[5] = addr >> 0*8;
1718 tmp_addr[4] = addr >> 1*8;
1719 tmp_addr[3] = addr >> 2*8;
1720 tmp_addr[2] = addr >> 3*8;
1721 tmp_addr[1] = addr >> 4*8;
1722 tmp_addr[0] = addr >> 5*8;
1723
1724 val += inc;
1725
1726 list_for_each_entry(sdata, &local->interfaces, list) {
1727 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1728 used = true;
1729 break;
1730 }
1731 }
1732
1733 if (!used) {
1734 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1735 break;
1736 }
1737 addr = (start & ~mask) | (val & mask);
1738 } while (addr != start);
1739
1740 break;
1741 }
1742
1743 out_unlock:
1744 mutex_unlock(&local->iflist_mtx);
1745}
1746
1747int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1748 unsigned char name_assign_type,
1749 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1750 struct vif_params *params)
1751{
1752 struct net_device *ndev = NULL;
1753 struct ieee80211_sub_if_data *sdata = NULL;
1754 struct txq_info *txqi;
1755 void (*if_setup)(struct net_device *dev);
1756 int ret, i;
1757 int txqs = 1;
1758
1759 ASSERT_RTNL();
1760
1761 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1762 struct wireless_dev *wdev;
1763
1764 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1765 GFP_KERNEL);
1766 if (!sdata)
1767 return -ENOMEM;
1768 wdev = &sdata->wdev;
1769
1770 sdata->dev = NULL;
1771 strlcpy(sdata->name, name, IFNAMSIZ);
1772 ieee80211_assign_perm_addr(local, wdev->address, type);
1773 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1774 } else {
1775 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1776 sizeof(void *));
1777 int txq_size = 0;
1778
1779 if (local->ops->wake_tx_queue &&
1780 type != NL80211_IFTYPE_AP_VLAN &&
1781 (type != NL80211_IFTYPE_MONITOR ||
1782 (params->flags & MONITOR_FLAG_ACTIVE)))
1783 txq_size += sizeof(struct txq_info) +
1784 local->hw.txq_data_size;
1785
1786 if (local->ops->wake_tx_queue) {
1787 if_setup = ieee80211_if_setup_no_queue;
1788 } else {
1789 if_setup = ieee80211_if_setup;
1790 if (local->hw.queues >= IEEE80211_NUM_ACS)
1791 txqs = IEEE80211_NUM_ACS;
1792 }
1793
1794 ndev = alloc_netdev_mqs(size + txq_size,
1795 name, name_assign_type,
1796 if_setup, txqs, 1);
1797 if (!ndev)
1798 return -ENOMEM;
1799 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1800
1801 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1802 if (!ndev->tstats) {
1803 free_netdev(ndev);
1804 return -ENOMEM;
1805 }
1806
1807 ndev->needed_headroom = local->tx_headroom +
1808 4*6 /* four MAC addresses */
1809 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1810 + 6 /* mesh */
1811 + 8 /* rfc1042/bridge tunnel */
1812 - ETH_HLEN /* ethernet hard_header_len */
1813 + IEEE80211_ENCRYPT_HEADROOM;
1814 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1815
1816 ret = dev_alloc_name(ndev, ndev->name);
1817 if (ret < 0) {
1818 ieee80211_if_free(ndev);
1819 free_netdev(ndev);
1820 return ret;
1821 }
1822
1823 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1824 if (is_valid_ether_addr(params->macaddr))
1825 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1826 else
1827 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1828 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1829
1830 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1831 sdata = netdev_priv(ndev);
1832 ndev->ieee80211_ptr = &sdata->wdev;
1833 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1834 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1835
1836 if (txq_size) {
1837 txqi = netdev_priv(ndev) + size;
1838 ieee80211_txq_init(sdata, NULL, txqi, 0);
1839 }
1840
1841 sdata->dev = ndev;
1842 }
1843
1844 /* initialise type-independent data */
1845 sdata->wdev.wiphy = local->hw.wiphy;
1846 sdata->local = local;
1847
1848 ieee80211_init_frag_cache(&sdata->frags);
1849
1850 INIT_LIST_HEAD(&sdata->key_list);
1851
1852 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1853 ieee80211_dfs_cac_timer_work);
1854 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1855 ieee80211_delayed_tailroom_dec);
1856
1857 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1858 struct ieee80211_supported_band *sband;
1859 sband = local->hw.wiphy->bands[i];
1860 sdata->rc_rateidx_mask[i] =
1861 sband ? (1 << sband->n_bitrates) - 1 : 0;
1862 if (sband) {
1863 __le16 cap;
1864 u16 *vht_rate_mask;
1865
1866 memcpy(sdata->rc_rateidx_mcs_mask[i],
1867 sband->ht_cap.mcs.rx_mask,
1868 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1869
1870 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1871 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1872 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1873 } else {
1874 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1875 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1876 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1877 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1878 }
1879 }
1880
1881 ieee80211_set_default_queues(sdata);
1882
1883 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1884 sdata->user_power_level = local->user_power_level;
1885
1886 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1887
1888 /* setup type-dependent data */
1889 ieee80211_setup_sdata(sdata, type);
1890
1891 if (ndev) {
1892 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1893 if (type == NL80211_IFTYPE_STATION)
1894 sdata->u.mgd.use_4addr = params->use_4addr;
1895
1896 ndev->features |= local->hw.netdev_features;
1897
1898 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1899
1900 /* MTU range is normally 256 - 2304, where the upper limit is
1901 * the maximum MSDU size. Monitor interfaces send and receive
1902 * MPDU and A-MSDU frames which may be much larger so we do
1903 * not impose an upper limit in that case.
1904 */
1905 ndev->min_mtu = 256;
1906 if (type == NL80211_IFTYPE_MONITOR)
1907 ndev->max_mtu = 0;
1908 else
1909 ndev->max_mtu = local->hw.max_mtu;
1910
1911 ret = register_netdevice(ndev);
1912 if (ret) {
1913 free_netdev(ndev);
1914 return ret;
1915 }
1916 }
1917
1918 mutex_lock(&local->iflist_mtx);
1919 list_add_tail_rcu(&sdata->list, &local->interfaces);
1920 mutex_unlock(&local->iflist_mtx);
1921
1922 if (new_wdev)
1923 *new_wdev = &sdata->wdev;
1924
1925 return 0;
1926}
1927
1928void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1929{
1930 ASSERT_RTNL();
1931
1932 mutex_lock(&sdata->local->iflist_mtx);
1933 list_del_rcu(&sdata->list);
1934 mutex_unlock(&sdata->local->iflist_mtx);
1935
1936 if (sdata->vif.txq)
1937 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1938
1939 synchronize_rcu();
1940
1941 if (sdata->dev) {
1942 unregister_netdevice(sdata->dev);
1943 } else {
1944 cfg80211_unregister_wdev(&sdata->wdev);
1945 ieee80211_teardown_sdata(sdata);
1946 kfree(sdata);
1947 }
1948}
1949
1950void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1951{
1952 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1953 return;
1954 ieee80211_do_stop(sdata, true);
1955}
1956
1957void ieee80211_remove_interfaces(struct ieee80211_local *local)
1958{
1959 struct ieee80211_sub_if_data *sdata, *tmp;
1960 LIST_HEAD(unreg_list);
1961 LIST_HEAD(wdev_list);
1962
1963 ASSERT_RTNL();
1964
1965 /* Before destroying the interfaces, make sure they're all stopped so
1966 * that the hardware is stopped. Otherwise, the driver might still be
1967 * iterating the interfaces during the shutdown, e.g. from a worker
1968 * or from RX processing or similar, and if it does so (using atomic
1969 * iteration) while we're manipulating the list, the iteration will
1970 * crash.
1971 *
1972 * After this, the hardware should be stopped and the driver should
1973 * have stopped all of its activities, so that we can do RCU-unaware
1974 * manipulations of the interface list below.
1975 */
1976 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1977
1978 WARN(local->open_count, "%s: open count remains %d\n",
1979 wiphy_name(local->hw.wiphy), local->open_count);
1980
1981 ieee80211_txq_teardown_flows(local);
1982
1983 mutex_lock(&local->iflist_mtx);
1984 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1985 list_del(&sdata->list);
1986
1987 if (sdata->dev)
1988 unregister_netdevice_queue(sdata->dev, &unreg_list);
1989 else
1990 list_add(&sdata->list, &wdev_list);
1991 }
1992 mutex_unlock(&local->iflist_mtx);
1993 unregister_netdevice_many(&unreg_list);
1994
1995 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1996 list_del(&sdata->list);
1997 cfg80211_unregister_wdev(&sdata->wdev);
1998 kfree(sdata);
1999 }
2000}
2001
2002static int netdev_notify(struct notifier_block *nb,
2003 unsigned long state, void *ptr)
2004{
2005 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2006 struct ieee80211_sub_if_data *sdata;
2007
2008 if (state != NETDEV_CHANGENAME)
2009 return NOTIFY_DONE;
2010
2011 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2012 return NOTIFY_DONE;
2013
2014 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2015 return NOTIFY_DONE;
2016
2017 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2018 memcpy(sdata->name, dev->name, IFNAMSIZ);
2019 ieee80211_debugfs_rename_netdev(sdata);
2020
2021 return NOTIFY_OK;
2022}
2023
2024static struct notifier_block mac80211_netdev_notifier = {
2025 .notifier_call = netdev_notify,
2026};
2027
2028int ieee80211_iface_init(void)
2029{
2030 return register_netdevice_notifier(&mac80211_netdev_notifier);
2031}
2032
2033void ieee80211_iface_exit(void)
2034{
2035 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2036}
2037
2038void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2039{
2040 if (sdata->vif.type == NL80211_IFTYPE_AP)
2041 atomic_inc(&sdata->u.ap.num_mcast_sta);
2042 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2043 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2044}
2045
2046void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2047{
2048 if (sdata->vif.type == NL80211_IFTYPE_AP)
2049 atomic_dec(&sdata->u.ap.num_mcast_sta);
2050 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2051 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2052}