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Linux 5.1.15
[linux/fpc-iii.git] / net / mac80211 / iface.c
blob02d2e6f11e936fb54814b909849116de173a91c9
1 /*
2 * Interface handling
3 *
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (c) 2016 Intel Deutschland GmbH
10 * Copyright (C) 2018 Intel Corporation
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16 #include <linux/slab.h>
17 #include <linux/kernel.h>
18 #include <linux/if_arp.h>
19 #include <linux/netdevice.h>
20 #include <linux/rtnetlink.h>
21 #include <net/mac80211.h>
22 #include <net/ieee80211_radiotap.h>
23 #include "ieee80211_i.h"
24 #include "sta_info.h"
25 #include "debugfs_netdev.h"
26 #include "mesh.h"
27 #include "led.h"
28 #include "driver-ops.h"
29 #include "wme.h"
30 #include "rate.h"
31
32 /**
33 * DOC: Interface list locking
34 *
35 * The interface list in each struct ieee80211_local is protected
36 * three-fold:
37 *
38 * (1) modifications may only be done under the RTNL
39 * (2) modifications and readers are protected against each other by
40 * the iflist_mtx.
41 * (3) modifications are done in an RCU manner so atomic readers
42 * can traverse the list in RCU-safe blocks.
43 *
44 * As a consequence, reads (traversals) of the list can be protected
45 * by either the RTNL, the iflist_mtx or RCU.
46 */
47
48 static void ieee80211_iface_work(struct work_struct *work);
49
50 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
51 {
52 struct ieee80211_chanctx_conf *chanctx_conf;
53 int power;
54
55 rcu_read_lock();
56 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
57 if (!chanctx_conf) {
58 rcu_read_unlock();
59 return false;
60 }
61
62 power = ieee80211_chandef_max_power(&chanctx_conf->def);
63 rcu_read_unlock();
64
65 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->user_power_level);
67
68 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
69 power = min(power, sdata->ap_power_level);
70
71 if (power != sdata->vif.bss_conf.txpower) {
72 sdata->vif.bss_conf.txpower = power;
73 ieee80211_hw_config(sdata->local, 0);
74 return true;
75 }
76
77 return false;
78 }
79
80 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
81 bool update_bss)
82 {
83 if (__ieee80211_recalc_txpower(sdata) ||
84 (update_bss && ieee80211_sdata_running(sdata)))
85 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
86 }
87
88 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
89 {
90 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
91 return 0;
92
93 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
94 return IEEE80211_CONF_CHANGE_IDLE;
95 }
96
97 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
98 {
99 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
100 return 0;
101
102 ieee80211_flush_queues(local, NULL, false);
103
104 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
105 return IEEE80211_CONF_CHANGE_IDLE;
106 }
107
108 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
109 bool force_active)
110 {
111 bool working, scanning, active;
112 unsigned int led_trig_start = 0, led_trig_stop = 0;
113
114 lockdep_assert_held(&local->mtx);
115
116 active = force_active ||
117 !list_empty(&local->chanctx_list) ||
118 local->monitors;
119
120 working = !local->ops->remain_on_channel &&
121 !list_empty(&local->roc_list);
122
123 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
124 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
125
126 if (working || scanning)
127 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 else
129 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130
131 if (active)
132 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133 else
134 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
135
136 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
137
138 if (working || scanning || active)
139 return __ieee80211_idle_off(local);
140 return __ieee80211_idle_on(local);
141 }
142
143 u32 ieee80211_idle_off(struct ieee80211_local *local)
144 {
145 return __ieee80211_recalc_idle(local, true);
146 }
147
148 void ieee80211_recalc_idle(struct ieee80211_local *local)
149 {
150 u32 change = __ieee80211_recalc_idle(local, false);
151 if (change)
152 ieee80211_hw_config(local, change);
153 }
154
155 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
156 bool check_dup)
157 {
158 struct ieee80211_local *local = sdata->local;
159 struct ieee80211_sub_if_data *iter;
160 u64 new, mask, tmp;
161 u8 *m;
162 int ret = 0;
163
164 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
165 return 0;
166
167 m = addr;
168 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
169 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
170 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
171
172 m = local->hw.wiphy->addr_mask;
173 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
176
177 if (!check_dup)
178 return ret;
179
180 mutex_lock(&local->iflist_mtx);
181 list_for_each_entry(iter, &local->interfaces, list) {
182 if (iter == sdata)
183 continue;
184
185 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
186 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
187 continue;
188
189 m = iter->vif.addr;
190 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
191 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
192 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
193
194 if ((new & ~mask) != (tmp & ~mask)) {
195 ret = -EINVAL;
196 break;
197 }
198 }
199 mutex_unlock(&local->iflist_mtx);
200
201 return ret;
202 }
203
204 static int ieee80211_change_mac(struct net_device *dev, void *addr)
205 {
206 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
207 struct sockaddr *sa = addr;
208 bool check_dup = true;
209 int ret;
210
211 if (ieee80211_sdata_running(sdata))
212 return -EBUSY;
213
214 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
215 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
216 check_dup = false;
217
218 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
219 if (ret)
220 return ret;
221
222 ret = eth_mac_addr(dev, sa);
223
224 if (ret == 0)
225 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
226
227 return ret;
228 }
229
230 static inline int identical_mac_addr_allowed(int type1, int type2)
231 {
232 return type1 == NL80211_IFTYPE_MONITOR ||
233 type2 == NL80211_IFTYPE_MONITOR ||
234 type1 == NL80211_IFTYPE_P2P_DEVICE ||
235 type2 == NL80211_IFTYPE_P2P_DEVICE ||
236 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
237 (type1 == NL80211_IFTYPE_WDS &&
238 (type2 == NL80211_IFTYPE_WDS ||
239 type2 == NL80211_IFTYPE_AP)) ||
240 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
241 (type1 == NL80211_IFTYPE_AP_VLAN &&
242 (type2 == NL80211_IFTYPE_AP ||
243 type2 == NL80211_IFTYPE_AP_VLAN));
244 }
245
246 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
247 enum nl80211_iftype iftype)
248 {
249 struct ieee80211_local *local = sdata->local;
250 struct ieee80211_sub_if_data *nsdata;
251 int ret;
252
253 ASSERT_RTNL();
254
255 /* we hold the RTNL here so can safely walk the list */
256 list_for_each_entry(nsdata, &local->interfaces, list) {
257 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
258 /*
259 * Only OCB and monitor mode may coexist
260 */
261 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
262 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
263 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
264 nsdata->vif.type == NL80211_IFTYPE_OCB))
265 return -EBUSY;
266
267 /*
268 * Allow only a single IBSS interface to be up at any
269 * time. This is restricted because beacon distribution
270 * cannot work properly if both are in the same IBSS.
271 *
272 * To remove this restriction we'd have to disallow them
273 * from setting the same SSID on different IBSS interfaces
274 * belonging to the same hardware. Then, however, we're
275 * faced with having to adopt two different TSF timers...
276 */
277 if (iftype == NL80211_IFTYPE_ADHOC &&
278 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
279 return -EBUSY;
280 /*
281 * will not add another interface while any channel
282 * switch is active.
283 */
284 if (nsdata->vif.csa_active)
285 return -EBUSY;
286
287 /*
288 * The remaining checks are only performed for interfaces
289 * with the same MAC address.
290 */
291 if (!ether_addr_equal(sdata->vif.addr,
292 nsdata->vif.addr))
293 continue;
294
295 /*
296 * check whether it may have the same address
297 */
298 if (!identical_mac_addr_allowed(iftype,
299 nsdata->vif.type))
300 return -ENOTUNIQ;
301
302 /*
303 * can only add VLANs to enabled APs
304 */
305 if (iftype == NL80211_IFTYPE_AP_VLAN &&
306 nsdata->vif.type == NL80211_IFTYPE_AP)
307 sdata->bss = &nsdata->u.ap;
308 }
309 }
310
311 mutex_lock(&local->chanctx_mtx);
312 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
313 mutex_unlock(&local->chanctx_mtx);
314 return ret;
315 }
316
317 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
318 enum nl80211_iftype iftype)
319 {
320 int n_queues = sdata->local->hw.queues;
321 int i;
322
323 if (iftype == NL80211_IFTYPE_NAN)
324 return 0;
325
326 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
327 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
329 IEEE80211_INVAL_HW_QUEUE))
330 return -EINVAL;
331 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
332 n_queues))
333 return -EINVAL;
334 }
335 }
336
337 if ((iftype != NL80211_IFTYPE_AP &&
338 iftype != NL80211_IFTYPE_P2P_GO &&
339 iftype != NL80211_IFTYPE_MESH_POINT) ||
340 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
341 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
342 return 0;
343 }
344
345 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
346 return -EINVAL;
347
348 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
349 return -EINVAL;
350
351 return 0;
352 }
353
354 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
355 const int offset)
356 {
357 struct ieee80211_local *local = sdata->local;
358 u32 flags = sdata->u.mntr.flags;
359
360 #define ADJUST(_f, _s) do { \
361 if (flags & MONITOR_FLAG_##_f) \
362 local->fif_##_s += offset; \
363 } while (0)
364
365 ADJUST(FCSFAIL, fcsfail);
366 ADJUST(PLCPFAIL, plcpfail);
367 ADJUST(CONTROL, control);
368 ADJUST(CONTROL, pspoll);
369 ADJUST(OTHER_BSS, other_bss);
370
371 #undef ADJUST
372 }
373
374 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
375 {
376 struct ieee80211_local *local = sdata->local;
377 int i;
378
379 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
380 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
381 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
382 else if (local->hw.queues >= IEEE80211_NUM_ACS)
383 sdata->vif.hw_queue[i] = i;
384 else
385 sdata->vif.hw_queue[i] = 0;
386 }
387 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
388 }
389
390 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
391 {
392 struct ieee80211_sub_if_data *sdata;
393 int ret;
394
395 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
396 return 0;
397
398 ASSERT_RTNL();
399
400 if (local->monitor_sdata)
401 return 0;
402
403 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
404 if (!sdata)
405 return -ENOMEM;
406
407 /* set up data */
408 sdata->local = local;
409 sdata->vif.type = NL80211_IFTYPE_MONITOR;
410 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
411 wiphy_name(local->hw.wiphy));
412 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
413
414 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
415
416 ieee80211_set_default_queues(sdata);
417
418 ret = drv_add_interface(local, sdata);
419 if (WARN_ON(ret)) {
420 /* ok .. stupid driver, it asked for this! */
421 kfree(sdata);
422 return ret;
423 }
424
425 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
426 if (ret) {
427 kfree(sdata);
428 return ret;
429 }
430
431 mutex_lock(&local->iflist_mtx);
432 rcu_assign_pointer(local->monitor_sdata, sdata);
433 mutex_unlock(&local->iflist_mtx);
434
435 mutex_lock(&local->mtx);
436 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
437 IEEE80211_CHANCTX_EXCLUSIVE);
438 mutex_unlock(&local->mtx);
439 if (ret) {
440 mutex_lock(&local->iflist_mtx);
441 RCU_INIT_POINTER(local->monitor_sdata, NULL);
442 mutex_unlock(&local->iflist_mtx);
443 synchronize_net();
444 drv_remove_interface(local, sdata);
445 kfree(sdata);
446 return ret;
447 }
448
449 skb_queue_head_init(&sdata->skb_queue);
450 INIT_WORK(&sdata->work, ieee80211_iface_work);
451
452 return 0;
453 }
454
455 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
456 {
457 struct ieee80211_sub_if_data *sdata;
458
459 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
460 return;
461
462 ASSERT_RTNL();
463
464 mutex_lock(&local->iflist_mtx);
465
466 sdata = rcu_dereference_protected(local->monitor_sdata,
467 lockdep_is_held(&local->iflist_mtx));
468 if (!sdata) {
469 mutex_unlock(&local->iflist_mtx);
470 return;
471 }
472
473 RCU_INIT_POINTER(local->monitor_sdata, NULL);
474 mutex_unlock(&local->iflist_mtx);
475
476 synchronize_net();
477
478 mutex_lock(&local->mtx);
479 ieee80211_vif_release_channel(sdata);
480 mutex_unlock(&local->mtx);
481
482 drv_remove_interface(local, sdata);
483
484 kfree(sdata);
485 }
486
487 /*
488 * NOTE: Be very careful when changing this function, it must NOT return
489 * an error on interface type changes that have been pre-checked, so most
490 * checks should be in ieee80211_check_concurrent_iface.
491 */
492 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
493 {
494 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
495 struct net_device *dev = wdev->netdev;
496 struct ieee80211_local *local = sdata->local;
497 struct sta_info *sta;
498 u32 changed = 0;
499 int res;
500 u32 hw_reconf_flags = 0;
501
502 switch (sdata->vif.type) {
503 case NL80211_IFTYPE_WDS:
504 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
505 return -ENOLINK;
506 break;
507 case NL80211_IFTYPE_AP_VLAN: {
508 struct ieee80211_sub_if_data *master;
509
510 if (!sdata->bss)
511 return -ENOLINK;
512
513 mutex_lock(&local->mtx);
514 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
515 mutex_unlock(&local->mtx);
516
517 master = container_of(sdata->bss,
518 struct ieee80211_sub_if_data, u.ap);
519 sdata->control_port_protocol =
520 master->control_port_protocol;
521 sdata->control_port_no_encrypt =
522 master->control_port_no_encrypt;
523 sdata->control_port_over_nl80211 =
524 master->control_port_over_nl80211;
525 sdata->vif.cab_queue = master->vif.cab_queue;
526 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
527 sizeof(sdata->vif.hw_queue));
528 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
529
530 mutex_lock(&local->key_mtx);
531 sdata->crypto_tx_tailroom_needed_cnt +=
532 master->crypto_tx_tailroom_needed_cnt;
533 mutex_unlock(&local->key_mtx);
534
535 break;
536 }
537 case NL80211_IFTYPE_AP:
538 sdata->bss = &sdata->u.ap;
539 break;
540 case NL80211_IFTYPE_MESH_POINT:
541 case NL80211_IFTYPE_STATION:
542 case NL80211_IFTYPE_MONITOR:
543 case NL80211_IFTYPE_ADHOC:
544 case NL80211_IFTYPE_P2P_DEVICE:
545 case NL80211_IFTYPE_OCB:
546 case NL80211_IFTYPE_NAN:
547 /* no special treatment */
548 break;
549 case NL80211_IFTYPE_UNSPECIFIED:
550 case NUM_NL80211_IFTYPES:
551 case NL80211_IFTYPE_P2P_CLIENT:
552 case NL80211_IFTYPE_P2P_GO:
553 /* cannot happen */
554 WARN_ON(1);
555 break;
556 }
557
558 if (local->open_count == 0) {
559 res = drv_start(local);
560 if (res)
561 goto err_del_bss;
562 /* we're brought up, everything changes */
563 hw_reconf_flags = ~0;
564 ieee80211_led_radio(local, true);
565 ieee80211_mod_tpt_led_trig(local,
566 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
567 }
568
569 /*
570 * Copy the hopefully now-present MAC address to
571 * this interface, if it has the special null one.
572 */
573 if (dev && is_zero_ether_addr(dev->dev_addr)) {
574 memcpy(dev->dev_addr,
575 local->hw.wiphy->perm_addr,
576 ETH_ALEN);
577 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
578
579 if (!is_valid_ether_addr(dev->dev_addr)) {
580 res = -EADDRNOTAVAIL;
581 goto err_stop;
582 }
583 }
584
585 switch (sdata->vif.type) {
586 case NL80211_IFTYPE_AP_VLAN:
587 /* no need to tell driver, but set carrier and chanctx */
588 if (rtnl_dereference(sdata->bss->beacon)) {
589 ieee80211_vif_vlan_copy_chanctx(sdata);
590 netif_carrier_on(dev);
591 } else {
592 netif_carrier_off(dev);
593 }
594 break;
595 case NL80211_IFTYPE_MONITOR:
596 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
597 local->cooked_mntrs++;
598 break;
599 }
600
601 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
602 res = drv_add_interface(local, sdata);
603 if (res)
604 goto err_stop;
605 } else if (local->monitors == 0 && local->open_count == 0) {
606 res = ieee80211_add_virtual_monitor(local);
607 if (res)
608 goto err_stop;
609 }
610
611 /* must be before the call to ieee80211_configure_filter */
612 local->monitors++;
613 if (local->monitors == 1) {
614 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
615 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
616 }
617
618 ieee80211_adjust_monitor_flags(sdata, 1);
619 ieee80211_configure_filter(local);
620 mutex_lock(&local->mtx);
621 ieee80211_recalc_idle(local);
622 mutex_unlock(&local->mtx);
623
624 netif_carrier_on(dev);
625 break;
626 default:
627 if (coming_up) {
628 ieee80211_del_virtual_monitor(local);
629
630 res = drv_add_interface(local, sdata);
631 if (res)
632 goto err_stop;
633 res = ieee80211_check_queues(sdata,
634 ieee80211_vif_type_p2p(&sdata->vif));
635 if (res)
636 goto err_del_interface;
637 }
638
639 if (sdata->vif.type == NL80211_IFTYPE_AP) {
640 local->fif_pspoll++;
641 local->fif_probe_req++;
642
643 ieee80211_configure_filter(local);
644 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
645 local->fif_probe_req++;
646 }
647
648 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
649 sdata->vif.type != NL80211_IFTYPE_NAN)
650 changed |= ieee80211_reset_erp_info(sdata);
651 ieee80211_bss_info_change_notify(sdata, changed);
652
653 switch (sdata->vif.type) {
654 case NL80211_IFTYPE_STATION:
655 case NL80211_IFTYPE_ADHOC:
656 case NL80211_IFTYPE_AP:
657 case NL80211_IFTYPE_MESH_POINT:
658 case NL80211_IFTYPE_OCB:
659 netif_carrier_off(dev);
660 break;
661 case NL80211_IFTYPE_WDS:
662 case NL80211_IFTYPE_P2P_DEVICE:
663 case NL80211_IFTYPE_NAN:
664 break;
665 default:
666 /* not reached */
667 WARN_ON(1);
668 }
669
670 /*
671 * Set default queue parameters so drivers don't
672 * need to initialise the hardware if the hardware
673 * doesn't start up with sane defaults.
674 * Enable QoS for anything but station interfaces.
675 */
676 ieee80211_set_wmm_default(sdata, true,
677 sdata->vif.type != NL80211_IFTYPE_STATION);
678 }
679
680 set_bit(SDATA_STATE_RUNNING, &sdata->state);
681
682 switch (sdata->vif.type) {
683 case NL80211_IFTYPE_WDS:
684 /* Create STA entry for the WDS peer */
685 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
686 GFP_KERNEL);
687 if (!sta) {
688 res = -ENOMEM;
689 goto err_del_interface;
690 }
691
692 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
693 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
694 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
695
696 res = sta_info_insert(sta);
697 if (res) {
698 /* STA has been freed */
699 goto err_del_interface;
700 }
701
702 rate_control_rate_init(sta);
703 netif_carrier_on(dev);
704 break;
705 case NL80211_IFTYPE_P2P_DEVICE:
706 rcu_assign_pointer(local->p2p_sdata, sdata);
707 break;
708 case NL80211_IFTYPE_MONITOR:
709 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
710 break;
711 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
712 break;
713 default:
714 break;
715 }
716
717 /*
718 * set_multicast_list will be invoked by the networking core
719 * which will check whether any increments here were done in
720 * error and sync them down to the hardware as filter flags.
721 */
722 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
723 atomic_inc(&local->iff_allmultis);
724
725 if (coming_up)
726 local->open_count++;
727
728 if (hw_reconf_flags)
729 ieee80211_hw_config(local, hw_reconf_flags);
730
731 ieee80211_recalc_ps(local);
732
733 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
734 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
735 local->ops->wake_tx_queue) {
736 /* XXX: for AP_VLAN, actually track AP queues */
737 if (dev)
738 netif_tx_start_all_queues(dev);
739 } else if (dev) {
740 unsigned long flags;
741 int n_acs = IEEE80211_NUM_ACS;
742 int ac;
743
744 if (local->hw.queues < IEEE80211_NUM_ACS)
745 n_acs = 1;
746
747 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
748 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
749 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
750 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
751 for (ac = 0; ac < n_acs; ac++) {
752 int ac_queue = sdata->vif.hw_queue[ac];
753
754 if (local->queue_stop_reasons[ac_queue] == 0 &&
755 skb_queue_empty(&local->pending[ac_queue]))
756 netif_start_subqueue(dev, ac);
757 }
758 }
759 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
760 }
761
762 return 0;
763 err_del_interface:
764 drv_remove_interface(local, sdata);
765 err_stop:
766 if (!local->open_count)
767 drv_stop(local);
768 err_del_bss:
769 sdata->bss = NULL;
770 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
771 mutex_lock(&local->mtx);
772 list_del(&sdata->u.vlan.list);
773 mutex_unlock(&local->mtx);
774 }
775 /* might already be clear but that doesn't matter */
776 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
777 return res;
778 }
779
780 static int ieee80211_open(struct net_device *dev)
781 {
782 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
783 int err;
784
785 /* fail early if user set an invalid address */
786 if (!is_valid_ether_addr(dev->dev_addr))
787 return -EADDRNOTAVAIL;
788
789 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
790 if (err)
791 return err;
792
793 return ieee80211_do_open(&sdata->wdev, true);
794 }
795
796 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
797 bool going_down)
798 {
799 struct ieee80211_local *local = sdata->local;
800 unsigned long flags;
801 struct sk_buff *skb, *tmp;
802 u32 hw_reconf_flags = 0;
803 int i, flushed;
804 struct ps_data *ps;
805 struct cfg80211_chan_def chandef;
806 bool cancel_scan;
807 struct cfg80211_nan_func *func;
808
809 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
810
811 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
812 if (cancel_scan)
813 ieee80211_scan_cancel(local);
814
815 /*
816 * Stop TX on this interface first.
817 */
818 if (sdata->dev)
819 netif_tx_stop_all_queues(sdata->dev);
820
821 ieee80211_roc_purge(local, sdata);
822
823 switch (sdata->vif.type) {
824 case NL80211_IFTYPE_STATION:
825 ieee80211_mgd_stop(sdata);
826 break;
827 case NL80211_IFTYPE_ADHOC:
828 ieee80211_ibss_stop(sdata);
829 break;
830 case NL80211_IFTYPE_AP:
831 cancel_work_sync(&sdata->u.ap.request_smps_work);
832 break;
833 case NL80211_IFTYPE_MONITOR:
834 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
835 break;
836 list_del_rcu(&sdata->u.mntr.list);
837 break;
838 default:
839 break;
840 }
841
842 /*
843 * Remove all stations associated with this interface.
844 *
845 * This must be done before calling ops->remove_interface()
846 * because otherwise we can later invoke ops->sta_notify()
847 * whenever the STAs are removed, and that invalidates driver
848 * assumptions about always getting a vif pointer that is valid
849 * (because if we remove a STA after ops->remove_interface()
850 * the driver will have removed the vif info already!)
851 *
852 * In WDS mode a station must exist here and be flushed, for
853 * AP_VLANs stations may exist since there's nothing else that
854 * would have removed them, but in other modes there shouldn't
855 * be any stations.
856 */
857 flushed = sta_info_flush(sdata);
858 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
859 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
860 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
861
862 /* don't count this interface for allmulti while it is down */
863 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
864 atomic_dec(&local->iff_allmultis);
865
866 if (sdata->vif.type == NL80211_IFTYPE_AP) {
867 local->fif_pspoll--;
868 local->fif_probe_req--;
869 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
870 local->fif_probe_req--;
871 }
872
873 if (sdata->dev) {
874 netif_addr_lock_bh(sdata->dev);
875 spin_lock_bh(&local->filter_lock);
876 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
877 sdata->dev->addr_len);
878 spin_unlock_bh(&local->filter_lock);
879 netif_addr_unlock_bh(sdata->dev);
880 }
881
882 del_timer_sync(&local->dynamic_ps_timer);
883 cancel_work_sync(&local->dynamic_ps_enable_work);
884
885 cancel_work_sync(&sdata->recalc_smps);
886 sdata_lock(sdata);
887 mutex_lock(&local->mtx);
888 sdata->vif.csa_active = false;
889 if (sdata->vif.type == NL80211_IFTYPE_STATION)
890 sdata->u.mgd.csa_waiting_bcn = false;
891 if (sdata->csa_block_tx) {
892 ieee80211_wake_vif_queues(local, sdata,
893 IEEE80211_QUEUE_STOP_REASON_CSA);
894 sdata->csa_block_tx = false;
895 }
896 mutex_unlock(&local->mtx);
897 sdata_unlock(sdata);
898
899 cancel_work_sync(&sdata->csa_finalize_work);
900
901 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
902
903 if (sdata->wdev.cac_started) {
904 chandef = sdata->vif.bss_conf.chandef;
905 WARN_ON(local->suspended);
906 mutex_lock(&local->mtx);
907 ieee80211_vif_release_channel(sdata);
908 mutex_unlock(&local->mtx);
909 cfg80211_cac_event(sdata->dev, &chandef,
910 NL80211_RADAR_CAC_ABORTED,
911 GFP_KERNEL);
912 }
913
914 /* APs need special treatment */
915 if (sdata->vif.type == NL80211_IFTYPE_AP) {
916 struct ieee80211_sub_if_data *vlan, *tmpsdata;
917
918 /* down all dependent devices, that is VLANs */
919 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
920 u.vlan.list)
921 dev_close(vlan->dev);
922 WARN_ON(!list_empty(&sdata->u.ap.vlans));
923 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
924 /* remove all packets in parent bc_buf pointing to this dev */
925 ps = &sdata->bss->ps;
926
927 spin_lock_irqsave(&ps->bc_buf.lock, flags);
928 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
929 if (skb->dev == sdata->dev) {
930 __skb_unlink(skb, &ps->bc_buf);
931 local->total_ps_buffered--;
932 ieee80211_free_txskb(&local->hw, skb);
933 }
934 }
935 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
936 }
937
938 if (going_down)
939 local->open_count--;
940
941 switch (sdata->vif.type) {
942 case NL80211_IFTYPE_AP_VLAN:
943 mutex_lock(&local->mtx);
944 list_del(&sdata->u.vlan.list);
945 mutex_unlock(&local->mtx);
946 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
947 /* see comment in the default case below */
948 ieee80211_free_keys(sdata, true);
949 /* no need to tell driver */
950 break;
951 case NL80211_IFTYPE_MONITOR:
952 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
953 local->cooked_mntrs--;
954 break;
955 }
956
957 local->monitors--;
958 if (local->monitors == 0) {
959 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
960 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
961 }
962
963 ieee80211_adjust_monitor_flags(sdata, -1);
964 break;
965 case NL80211_IFTYPE_NAN:
966 /* clean all the functions */
967 spin_lock_bh(&sdata->u.nan.func_lock);
968
969 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
970 idr_remove(&sdata->u.nan.function_inst_ids, i);
971 cfg80211_free_nan_func(func);
972 }
973 idr_destroy(&sdata->u.nan.function_inst_ids);
974
975 spin_unlock_bh(&sdata->u.nan.func_lock);
976 break;
977 case NL80211_IFTYPE_P2P_DEVICE:
978 /* relies on synchronize_rcu() below */
979 RCU_INIT_POINTER(local->p2p_sdata, NULL);
980 /* fall through */
981 default:
982 cancel_work_sync(&sdata->work);
983 /*
984 * When we get here, the interface is marked down.
985 * Free the remaining keys, if there are any
986 * (which can happen in AP mode if userspace sets
987 * keys before the interface is operating, and maybe
988 * also in WDS mode)
989 *
990 * Force the key freeing to always synchronize_net()
991 * to wait for the RX path in case it is using this
992 * interface enqueuing frames at this very time on
993 * another CPU.
994 */
995 ieee80211_free_keys(sdata, true);
996 skb_queue_purge(&sdata->skb_queue);
997 }
998
999 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1000 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1001 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1002 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1003 if (info->control.vif == &sdata->vif) {
1004 __skb_unlink(skb, &local->pending[i]);
1005 ieee80211_free_txskb(&local->hw, skb);
1006 }
1007 }
1008 }
1009 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1010
1011 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1012 ieee80211_txq_remove_vlan(local, sdata);
1013
1014 sdata->bss = NULL;
1015
1016 if (local->open_count == 0)
1017 ieee80211_clear_tx_pending(local);
1018
1019 sdata->vif.bss_conf.beacon_int = 0;
1020
1021 /*
1022 * If the interface goes down while suspended, presumably because
1023 * the device was unplugged and that happens before our resume,
1024 * then the driver is already unconfigured and the remainder of
1025 * this function isn't needed.
1026 * XXX: what about WoWLAN? If the device has software state, e.g.
1027 * memory allocated, it might expect teardown commands from
1028 * mac80211 here?
1029 */
1030 if (local->suspended) {
1031 WARN_ON(local->wowlan);
1032 WARN_ON(rtnl_dereference(local->monitor_sdata));
1033 return;
1034 }
1035
1036 switch (sdata->vif.type) {
1037 case NL80211_IFTYPE_AP_VLAN:
1038 break;
1039 case NL80211_IFTYPE_MONITOR:
1040 if (local->monitors == 0)
1041 ieee80211_del_virtual_monitor(local);
1042
1043 mutex_lock(&local->mtx);
1044 ieee80211_recalc_idle(local);
1045 mutex_unlock(&local->mtx);
1046
1047 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1048 break;
1049
1050 /* fall through */
1051 default:
1052 if (going_down)
1053 drv_remove_interface(local, sdata);
1054 }
1055
1056 ieee80211_recalc_ps(local);
1057
1058 if (cancel_scan)
1059 flush_delayed_work(&local->scan_work);
1060
1061 if (local->open_count == 0) {
1062 ieee80211_stop_device(local);
1063
1064 /* no reconfiguring after stop! */
1065 return;
1066 }
1067
1068 /* do after stop to avoid reconfiguring when we stop anyway */
1069 ieee80211_configure_filter(local);
1070 ieee80211_hw_config(local, hw_reconf_flags);
1071
1072 if (local->monitors == local->open_count)
1073 ieee80211_add_virtual_monitor(local);
1074 }
1075
1076 static int ieee80211_stop(struct net_device *dev)
1077 {
1078 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1079
1080 ieee80211_do_stop(sdata, true);
1081
1082 return 0;
1083 }
1084
1085 static void ieee80211_set_multicast_list(struct net_device *dev)
1086 {
1087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1088 struct ieee80211_local *local = sdata->local;
1089 int allmulti, sdata_allmulti;
1090
1091 allmulti = !!(dev->flags & IFF_ALLMULTI);
1092 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1093
1094 if (allmulti != sdata_allmulti) {
1095 if (dev->flags & IFF_ALLMULTI)
1096 atomic_inc(&local->iff_allmultis);
1097 else
1098 atomic_dec(&local->iff_allmultis);
1099 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1100 }
1101
1102 spin_lock_bh(&local->filter_lock);
1103 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1104 spin_unlock_bh(&local->filter_lock);
1105 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1106 }
1107
1108 /*
1109 * Called when the netdev is removed or, by the code below, before
1110 * the interface type changes.
1111 */
1112 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1113 {
1114 int i;
1115
1116 /* free extra data */
1117 ieee80211_free_keys(sdata, false);
1118
1119 ieee80211_debugfs_remove_netdev(sdata);
1120
1121 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1122 __skb_queue_purge(&sdata->fragments[i].skb_list);
1123 sdata->fragment_next = 0;
1124
1125 if (ieee80211_vif_is_mesh(&sdata->vif))
1126 ieee80211_mesh_teardown_sdata(sdata);
1127 }
1128
1129 static void ieee80211_uninit(struct net_device *dev)
1130 {
1131 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1132 }
1133
1134 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1135 struct sk_buff *skb,
1136 struct net_device *sb_dev,
1137 select_queue_fallback_t fallback)
1138 {
1139 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1140 }
1141
1142 static void
1143 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1144 {
1145 int i;
1146
1147 for_each_possible_cpu(i) {
1148 const struct pcpu_sw_netstats *tstats;
1149 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1150 unsigned int start;
1151
1152 tstats = per_cpu_ptr(dev->tstats, i);
1153
1154 do {
1155 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1156 rx_packets = tstats->rx_packets;
1157 tx_packets = tstats->tx_packets;
1158 rx_bytes = tstats->rx_bytes;
1159 tx_bytes = tstats->tx_bytes;
1160 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1161
1162 stats->rx_packets += rx_packets;
1163 stats->tx_packets += tx_packets;
1164 stats->rx_bytes += rx_bytes;
1165 stats->tx_bytes += tx_bytes;
1166 }
1167 }
1168
1169 static const struct net_device_ops ieee80211_dataif_ops = {
1170 .ndo_open = ieee80211_open,
1171 .ndo_stop = ieee80211_stop,
1172 .ndo_uninit = ieee80211_uninit,
1173 .ndo_start_xmit = ieee80211_subif_start_xmit,
1174 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1175 .ndo_set_mac_address = ieee80211_change_mac,
1176 .ndo_select_queue = ieee80211_netdev_select_queue,
1177 .ndo_get_stats64 = ieee80211_get_stats64,
1178 };
1179
1180 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1181 struct sk_buff *skb,
1182 struct net_device *sb_dev,
1183 select_queue_fallback_t fallback)
1184 {
1185 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1186 struct ieee80211_local *local = sdata->local;
1187 struct ieee80211_hdr *hdr;
1188 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1189
1190 if (local->hw.queues < IEEE80211_NUM_ACS)
1191 return 0;
1192
1193 if (skb->len < 4 ||
1194 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1195 return 0; /* doesn't matter, frame will be dropped */
1196
1197 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1198
1199 return ieee80211_select_queue_80211(sdata, skb, hdr);
1200 }
1201
1202 static const struct net_device_ops ieee80211_monitorif_ops = {
1203 .ndo_open = ieee80211_open,
1204 .ndo_stop = ieee80211_stop,
1205 .ndo_uninit = ieee80211_uninit,
1206 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1207 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1208 .ndo_set_mac_address = ieee80211_change_mac,
1209 .ndo_select_queue = ieee80211_monitor_select_queue,
1210 .ndo_get_stats64 = ieee80211_get_stats64,
1211 };
1212
1213 static void ieee80211_if_free(struct net_device *dev)
1214 {
1215 free_percpu(dev->tstats);
1216 }
1217
1218 static void ieee80211_if_setup(struct net_device *dev)
1219 {
1220 ether_setup(dev);
1221 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1222 dev->netdev_ops = &ieee80211_dataif_ops;
1223 dev->needs_free_netdev = true;
1224 dev->priv_destructor = ieee80211_if_free;
1225 }
1226
1227 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1228 {
1229 ieee80211_if_setup(dev);
1230 dev->priv_flags |= IFF_NO_QUEUE;
1231 }
1232
1233 static void ieee80211_iface_work(struct work_struct *work)
1234 {
1235 struct ieee80211_sub_if_data *sdata =
1236 container_of(work, struct ieee80211_sub_if_data, work);
1237 struct ieee80211_local *local = sdata->local;
1238 struct sk_buff *skb;
1239 struct sta_info *sta;
1240
1241 if (!ieee80211_sdata_running(sdata))
1242 return;
1243
1244 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1245 return;
1246
1247 if (!ieee80211_can_run_worker(local))
1248 return;
1249
1250 /* first process frames */
1251 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1252 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1253
1254 if (ieee80211_is_action(mgmt->frame_control) &&
1255 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1256 int len = skb->len;
1257
1258 mutex_lock(&local->sta_mtx);
1259 sta = sta_info_get_bss(sdata, mgmt->sa);
1260 if (sta) {
1261 switch (mgmt->u.action.u.addba_req.action_code) {
1262 case WLAN_ACTION_ADDBA_REQ:
1263 ieee80211_process_addba_request(
1264 local, sta, mgmt, len);
1265 break;
1266 case WLAN_ACTION_ADDBA_RESP:
1267 ieee80211_process_addba_resp(local, sta,
1268 mgmt, len);
1269 break;
1270 case WLAN_ACTION_DELBA:
1271 ieee80211_process_delba(sdata, sta,
1272 mgmt, len);
1273 break;
1274 default:
1275 WARN_ON(1);
1276 break;
1277 }
1278 }
1279 mutex_unlock(&local->sta_mtx);
1280 } else if (ieee80211_is_action(mgmt->frame_control) &&
1281 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1282 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1283 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1284 struct ieee80211_rx_status *status;
1285 enum nl80211_band band;
1286 u8 opmode;
1287
1288 status = IEEE80211_SKB_RXCB(skb);
1289 band = status->band;
1290 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1291
1292 mutex_lock(&local->sta_mtx);
1293 sta = sta_info_get_bss(sdata, mgmt->sa);
1294
1295 if (sta)
1296 ieee80211_vht_handle_opmode(sdata, sta,
1297 opmode,
1298 band);
1299
1300 mutex_unlock(&local->sta_mtx);
1301 break;
1302 }
1303 case WLAN_VHT_ACTION_GROUPID_MGMT:
1304 ieee80211_process_mu_groups(sdata, mgmt);
1305 break;
1306 default:
1307 WARN_ON(1);
1308 break;
1309 }
1310 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1311 struct ieee80211_hdr *hdr = (void *)mgmt;
1312 /*
1313 * So the frame isn't mgmt, but frame_control
1314 * is at the right place anyway, of course, so
1315 * the if statement is correct.
1316 *
1317 * Warn if we have other data frame types here,
1318 * they must not get here.
1319 */
1320 WARN_ON(hdr->frame_control &
1321 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1322 WARN_ON(!(hdr->seq_ctrl &
1323 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1324 /*
1325 * This was a fragment of a frame, received while
1326 * a block-ack session was active. That cannot be
1327 * right, so terminate the session.
1328 */
1329 mutex_lock(&local->sta_mtx);
1330 sta = sta_info_get_bss(sdata, mgmt->sa);
1331 if (sta) {
1332 u16 tid = ieee80211_get_tid(hdr);
1333
1334 __ieee80211_stop_rx_ba_session(
1335 sta, tid, WLAN_BACK_RECIPIENT,
1336 WLAN_REASON_QSTA_REQUIRE_SETUP,
1337 true);
1338 }
1339 mutex_unlock(&local->sta_mtx);
1340 } else switch (sdata->vif.type) {
1341 case NL80211_IFTYPE_STATION:
1342 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1343 break;
1344 case NL80211_IFTYPE_ADHOC:
1345 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1346 break;
1347 case NL80211_IFTYPE_MESH_POINT:
1348 if (!ieee80211_vif_is_mesh(&sdata->vif))
1349 break;
1350 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1351 break;
1352 default:
1353 WARN(1, "frame for unexpected interface type");
1354 break;
1355 }
1356
1357 kfree_skb(skb);
1358 }
1359
1360 /* then other type-dependent work */
1361 switch (sdata->vif.type) {
1362 case NL80211_IFTYPE_STATION:
1363 ieee80211_sta_work(sdata);
1364 break;
1365 case NL80211_IFTYPE_ADHOC:
1366 ieee80211_ibss_work(sdata);
1367 break;
1368 case NL80211_IFTYPE_MESH_POINT:
1369 if (!ieee80211_vif_is_mesh(&sdata->vif))
1370 break;
1371 ieee80211_mesh_work(sdata);
1372 break;
1373 case NL80211_IFTYPE_OCB:
1374 ieee80211_ocb_work(sdata);
1375 break;
1376 default:
1377 break;
1378 }
1379 }
1380
1381 static void ieee80211_recalc_smps_work(struct work_struct *work)
1382 {
1383 struct ieee80211_sub_if_data *sdata =
1384 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1385
1386 ieee80211_recalc_smps(sdata);
1387 }
1388
1389 /*
1390 * Helper function to initialise an interface to a specific type.
1391 */
1392 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1393 enum nl80211_iftype type)
1394 {
1395 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1396 0xff, 0xff, 0xff};
1397
1398 /* clear type-dependent union */
1399 memset(&sdata->u, 0, sizeof(sdata->u));
1400
1401 /* and set some type-dependent values */
1402 sdata->vif.type = type;
1403 sdata->vif.p2p = false;
1404 sdata->wdev.iftype = type;
1405
1406 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1407 sdata->control_port_no_encrypt = false;
1408 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1409 sdata->vif.bss_conf.idle = true;
1410
1411 sdata->noack_map = 0;
1412
1413 /* only monitor/p2p-device differ */
1414 if (sdata->dev) {
1415 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1416 sdata->dev->type = ARPHRD_ETHER;
1417 }
1418
1419 skb_queue_head_init(&sdata->skb_queue);
1420 INIT_WORK(&sdata->work, ieee80211_iface_work);
1421 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1422 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1423 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1424 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1425
1426 switch (type) {
1427 case NL80211_IFTYPE_P2P_GO:
1428 type = NL80211_IFTYPE_AP;
1429 sdata->vif.type = type;
1430 sdata->vif.p2p = true;
1431 /* fall through */
1432 case NL80211_IFTYPE_AP:
1433 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1434 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1435 INIT_WORK(&sdata->u.ap.request_smps_work,
1436 ieee80211_request_smps_ap_work);
1437 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1438 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1439 break;
1440 case NL80211_IFTYPE_P2P_CLIENT:
1441 type = NL80211_IFTYPE_STATION;
1442 sdata->vif.type = type;
1443 sdata->vif.p2p = true;
1444 /* fall through */
1445 case NL80211_IFTYPE_STATION:
1446 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1447 ieee80211_sta_setup_sdata(sdata);
1448 break;
1449 case NL80211_IFTYPE_OCB:
1450 sdata->vif.bss_conf.bssid = bssid_wildcard;
1451 ieee80211_ocb_setup_sdata(sdata);
1452 break;
1453 case NL80211_IFTYPE_ADHOC:
1454 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1455 ieee80211_ibss_setup_sdata(sdata);
1456 break;
1457 case NL80211_IFTYPE_MESH_POINT:
1458 if (ieee80211_vif_is_mesh(&sdata->vif))
1459 ieee80211_mesh_init_sdata(sdata);
1460 break;
1461 case NL80211_IFTYPE_MONITOR:
1462 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1463 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1464 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1465 MONITOR_FLAG_OTHER_BSS;
1466 break;
1467 case NL80211_IFTYPE_WDS:
1468 sdata->vif.bss_conf.bssid = NULL;
1469 break;
1470 case NL80211_IFTYPE_NAN:
1471 idr_init(&sdata->u.nan.function_inst_ids);
1472 spin_lock_init(&sdata->u.nan.func_lock);
1473 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1474 break;
1475 case NL80211_IFTYPE_AP_VLAN:
1476 case NL80211_IFTYPE_P2P_DEVICE:
1477 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1478 break;
1479 case NL80211_IFTYPE_UNSPECIFIED:
1480 case NUM_NL80211_IFTYPES:
1481 WARN_ON(1);
1482 break;
1483 }
1484
1485 ieee80211_debugfs_add_netdev(sdata);
1486 }
1487
1488 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1489 enum nl80211_iftype type)
1490 {
1491 struct ieee80211_local *local = sdata->local;
1492 int ret, err;
1493 enum nl80211_iftype internal_type = type;
1494 bool p2p = false;
1495
1496 ASSERT_RTNL();
1497
1498 if (!local->ops->change_interface)
1499 return -EBUSY;
1500
1501 switch (sdata->vif.type) {
1502 case NL80211_IFTYPE_AP:
1503 case NL80211_IFTYPE_STATION:
1504 case NL80211_IFTYPE_ADHOC:
1505 case NL80211_IFTYPE_OCB:
1506 /*
1507 * Could maybe also all others here?
1508 * Just not sure how that interacts
1509 * with the RX/config path e.g. for
1510 * mesh.
1511 */
1512 break;
1513 default:
1514 return -EBUSY;
1515 }
1516
1517 switch (type) {
1518 case NL80211_IFTYPE_AP:
1519 case NL80211_IFTYPE_STATION:
1520 case NL80211_IFTYPE_ADHOC:
1521 case NL80211_IFTYPE_OCB:
1522 /*
1523 * Could probably support everything
1524 * but WDS here (WDS do_open can fail
1525 * under memory pressure, which this
1526 * code isn't prepared to handle).
1527 */
1528 break;
1529 case NL80211_IFTYPE_P2P_CLIENT:
1530 p2p = true;
1531 internal_type = NL80211_IFTYPE_STATION;
1532 break;
1533 case NL80211_IFTYPE_P2P_GO:
1534 p2p = true;
1535 internal_type = NL80211_IFTYPE_AP;
1536 break;
1537 default:
1538 return -EBUSY;
1539 }
1540
1541 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1542 if (ret)
1543 return ret;
1544
1545 ieee80211_do_stop(sdata, false);
1546
1547 ieee80211_teardown_sdata(sdata);
1548
1549 ret = drv_change_interface(local, sdata, internal_type, p2p);
1550 if (ret)
1551 type = ieee80211_vif_type_p2p(&sdata->vif);
1552
1553 /*
1554 * Ignore return value here, there's not much we can do since
1555 * the driver changed the interface type internally already.
1556 * The warnings will hopefully make driver authors fix it :-)
1557 */
1558 ieee80211_check_queues(sdata, type);
1559
1560 ieee80211_setup_sdata(sdata, type);
1561
1562 err = ieee80211_do_open(&sdata->wdev, false);
1563 WARN(err, "type change: do_open returned %d", err);
1564
1565 return ret;
1566 }
1567
1568 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1569 enum nl80211_iftype type)
1570 {
1571 int ret;
1572
1573 ASSERT_RTNL();
1574
1575 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1576 return 0;
1577
1578 if (ieee80211_sdata_running(sdata)) {
1579 ret = ieee80211_runtime_change_iftype(sdata, type);
1580 if (ret)
1581 return ret;
1582 } else {
1583 /* Purge and reset type-dependent state. */
1584 ieee80211_teardown_sdata(sdata);
1585 ieee80211_setup_sdata(sdata, type);
1586 }
1587
1588 /* reset some values that shouldn't be kept across type changes */
1589 if (type == NL80211_IFTYPE_STATION)
1590 sdata->u.mgd.use_4addr = false;
1591
1592 return 0;
1593 }
1594
1595 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1596 u8 *perm_addr, enum nl80211_iftype type)
1597 {
1598 struct ieee80211_sub_if_data *sdata;
1599 u64 mask, start, addr, val, inc;
1600 u8 *m;
1601 u8 tmp_addr[ETH_ALEN];
1602 int i;
1603
1604 /* default ... something at least */
1605 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1606
1607 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1608 local->hw.wiphy->n_addresses <= 1)
1609 return;
1610
1611 mutex_lock(&local->iflist_mtx);
1612
1613 switch (type) {
1614 case NL80211_IFTYPE_MONITOR:
1615 /* doesn't matter */
1616 break;
1617 case NL80211_IFTYPE_WDS:
1618 case NL80211_IFTYPE_AP_VLAN:
1619 /* match up with an AP interface */
1620 list_for_each_entry(sdata, &local->interfaces, list) {
1621 if (sdata->vif.type != NL80211_IFTYPE_AP)
1622 continue;
1623 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1624 break;
1625 }
1626 /* keep default if no AP interface present */
1627 break;
1628 case NL80211_IFTYPE_P2P_CLIENT:
1629 case NL80211_IFTYPE_P2P_GO:
1630 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1631 list_for_each_entry(sdata, &local->interfaces, list) {
1632 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1633 continue;
1634 if (!ieee80211_sdata_running(sdata))
1635 continue;
1636 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1637 goto out_unlock;
1638 }
1639 }
1640 /* fall through */
1641 default:
1642 /* assign a new address if possible -- try n_addresses first */
1643 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1644 bool used = false;
1645
1646 list_for_each_entry(sdata, &local->interfaces, list) {
1647 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1648 sdata->vif.addr)) {
1649 used = true;
1650 break;
1651 }
1652 }
1653
1654 if (!used) {
1655 memcpy(perm_addr,
1656 local->hw.wiphy->addresses[i].addr,
1657 ETH_ALEN);
1658 break;
1659 }
1660 }
1661
1662 /* try mask if available */
1663 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1664 break;
1665
1666 m = local->hw.wiphy->addr_mask;
1667 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1668 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1669 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1670
1671 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1672 /* not a contiguous mask ... not handled now! */
1673 pr_info("not contiguous\n");
1674 break;
1675 }
1676
1677 /*
1678 * Pick address of existing interface in case user changed
1679 * MAC address manually, default to perm_addr.
1680 */
1681 m = local->hw.wiphy->perm_addr;
1682 list_for_each_entry(sdata, &local->interfaces, list) {
1683 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1684 continue;
1685 m = sdata->vif.addr;
1686 break;
1687 }
1688 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1689 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1690 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1691
1692 inc = 1ULL<<__ffs64(mask);
1693 val = (start & mask);
1694 addr = (start & ~mask) | (val & mask);
1695 do {
1696 bool used = false;
1697
1698 tmp_addr[5] = addr >> 0*8;
1699 tmp_addr[4] = addr >> 1*8;
1700 tmp_addr[3] = addr >> 2*8;
1701 tmp_addr[2] = addr >> 3*8;
1702 tmp_addr[1] = addr >> 4*8;
1703 tmp_addr[0] = addr >> 5*8;
1704
1705 val += inc;
1706
1707 list_for_each_entry(sdata, &local->interfaces, list) {
1708 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1709 used = true;
1710 break;
1711 }
1712 }
1713
1714 if (!used) {
1715 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1716 break;
1717 }
1718 addr = (start & ~mask) | (val & mask);
1719 } while (addr != start);
1720
1721 break;
1722 }
1723
1724 out_unlock:
1725 mutex_unlock(&local->iflist_mtx);
1726 }
1727
1728 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1729 unsigned char name_assign_type,
1730 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1731 struct vif_params *params)
1732 {
1733 struct net_device *ndev = NULL;
1734 struct ieee80211_sub_if_data *sdata = NULL;
1735 struct txq_info *txqi;
1736 void (*if_setup)(struct net_device *dev);
1737 int ret, i;
1738 int txqs = 1;
1739
1740 ASSERT_RTNL();
1741
1742 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1743 struct wireless_dev *wdev;
1744
1745 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1746 GFP_KERNEL);
1747 if (!sdata)
1748 return -ENOMEM;
1749 wdev = &sdata->wdev;
1750
1751 sdata->dev = NULL;
1752 strlcpy(sdata->name, name, IFNAMSIZ);
1753 ieee80211_assign_perm_addr(local, wdev->address, type);
1754 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1755 } else {
1756 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1757 sizeof(void *));
1758 int txq_size = 0;
1759
1760 if (local->ops->wake_tx_queue &&
1761 type != NL80211_IFTYPE_AP_VLAN &&
1762 (type != NL80211_IFTYPE_MONITOR ||
1763 (params->flags & MONITOR_FLAG_ACTIVE)))
1764 txq_size += sizeof(struct txq_info) +
1765 local->hw.txq_data_size;
1766
1767 if (local->ops->wake_tx_queue)
1768 if_setup = ieee80211_if_setup_no_queue;
1769 else
1770 if_setup = ieee80211_if_setup;
1771
1772 if (local->hw.queues >= IEEE80211_NUM_ACS)
1773 txqs = IEEE80211_NUM_ACS;
1774
1775 ndev = alloc_netdev_mqs(size + txq_size,
1776 name, name_assign_type,
1777 if_setup, txqs, 1);
1778 if (!ndev)
1779 return -ENOMEM;
1780 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1781
1782 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1783 if (!ndev->tstats) {
1784 free_netdev(ndev);
1785 return -ENOMEM;
1786 }
1787
1788 ndev->needed_headroom = local->tx_headroom +
1789 4*6 /* four MAC addresses */
1790 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1791 + 6 /* mesh */
1792 + 8 /* rfc1042/bridge tunnel */
1793 - ETH_HLEN /* ethernet hard_header_len */
1794 + IEEE80211_ENCRYPT_HEADROOM;
1795 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1796
1797 ret = dev_alloc_name(ndev, ndev->name);
1798 if (ret < 0) {
1799 ieee80211_if_free(ndev);
1800 free_netdev(ndev);
1801 return ret;
1802 }
1803
1804 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1805 if (is_valid_ether_addr(params->macaddr))
1806 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1807 else
1808 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1809 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1810
1811 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1812 sdata = netdev_priv(ndev);
1813 ndev->ieee80211_ptr = &sdata->wdev;
1814 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1815 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1816
1817 if (txq_size) {
1818 txqi = netdev_priv(ndev) + size;
1819 ieee80211_txq_init(sdata, NULL, txqi, 0);
1820 }
1821
1822 sdata->dev = ndev;
1823 }
1824
1825 /* initialise type-independent data */
1826 sdata->wdev.wiphy = local->hw.wiphy;
1827 sdata->local = local;
1828
1829 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1830 skb_queue_head_init(&sdata->fragments[i].skb_list);
1831
1832 INIT_LIST_HEAD(&sdata->key_list);
1833
1834 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1835 ieee80211_dfs_cac_timer_work);
1836 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1837 ieee80211_delayed_tailroom_dec);
1838
1839 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1840 struct ieee80211_supported_band *sband;
1841 sband = local->hw.wiphy->bands[i];
1842 sdata->rc_rateidx_mask[i] =
1843 sband ? (1 << sband->n_bitrates) - 1 : 0;
1844 if (sband) {
1845 __le16 cap;
1846 u16 *vht_rate_mask;
1847
1848 memcpy(sdata->rc_rateidx_mcs_mask[i],
1849 sband->ht_cap.mcs.rx_mask,
1850 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1851
1852 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1853 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1854 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1855 } else {
1856 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1857 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1858 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1859 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1860 }
1861 }
1862
1863 ieee80211_set_default_queues(sdata);
1864
1865 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1866 sdata->user_power_level = local->user_power_level;
1867
1868 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1869
1870 /* setup type-dependent data */
1871 ieee80211_setup_sdata(sdata, type);
1872
1873 if (ndev) {
1874 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1875 if (type == NL80211_IFTYPE_STATION)
1876 sdata->u.mgd.use_4addr = params->use_4addr;
1877
1878 ndev->features |= local->hw.netdev_features;
1879
1880 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1881
1882 /* MTU range: 256 - 2304 */
1883 ndev->min_mtu = 256;
1884 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1885
1886 ret = register_netdevice(ndev);
1887 if (ret) {
1888 free_netdev(ndev);
1889 return ret;
1890 }
1891 }
1892
1893 mutex_lock(&local->iflist_mtx);
1894 list_add_tail_rcu(&sdata->list, &local->interfaces);
1895 mutex_unlock(&local->iflist_mtx);
1896
1897 if (new_wdev)
1898 *new_wdev = &sdata->wdev;
1899
1900 return 0;
1901 }
1902
1903 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1904 {
1905 ASSERT_RTNL();
1906
1907 mutex_lock(&sdata->local->iflist_mtx);
1908 list_del_rcu(&sdata->list);
1909 mutex_unlock(&sdata->local->iflist_mtx);
1910
1911 if (sdata->vif.txq)
1912 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1913
1914 synchronize_rcu();
1915
1916 if (sdata->dev) {
1917 unregister_netdevice(sdata->dev);
1918 } else {
1919 cfg80211_unregister_wdev(&sdata->wdev);
1920 ieee80211_teardown_sdata(sdata);
1921 kfree(sdata);
1922 }
1923 }
1924
1925 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1926 {
1927 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1928 return;
1929 ieee80211_do_stop(sdata, true);
1930 }
1931
1932 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1933 {
1934 struct ieee80211_sub_if_data *sdata, *tmp;
1935 LIST_HEAD(unreg_list);
1936 LIST_HEAD(wdev_list);
1937
1938 ASSERT_RTNL();
1939
1940 /* Before destroying the interfaces, make sure they're all stopped so
1941 * that the hardware is stopped. Otherwise, the driver might still be
1942 * iterating the interfaces during the shutdown, e.g. from a worker
1943 * or from RX processing or similar, and if it does so (using atomic
1944 * iteration) while we're manipulating the list, the iteration will
1945 * crash.
1946 *
1947 * After this, the hardware should be stopped and the driver should
1948 * have stopped all of its activities, so that we can do RCU-unaware
1949 * manipulations of the interface list below.
1950 */
1951 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1952
1953 WARN(local->open_count, "%s: open count remains %d\n",
1954 wiphy_name(local->hw.wiphy), local->open_count);
1955
1956 ieee80211_txq_teardown_flows(local);
1957
1958 mutex_lock(&local->iflist_mtx);
1959 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1960 list_del(&sdata->list);
1961
1962 if (sdata->dev)
1963 unregister_netdevice_queue(sdata->dev, &unreg_list);
1964 else
1965 list_add(&sdata->list, &wdev_list);
1966 }
1967 mutex_unlock(&local->iflist_mtx);
1968 unregister_netdevice_many(&unreg_list);
1969
1970 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1971 list_del(&sdata->list);
1972 cfg80211_unregister_wdev(&sdata->wdev);
1973 kfree(sdata);
1974 }
1975 }
1976
1977 static int netdev_notify(struct notifier_block *nb,
1978 unsigned long state, void *ptr)
1979 {
1980 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1981 struct ieee80211_sub_if_data *sdata;
1982
1983 if (state != NETDEV_CHANGENAME)
1984 return NOTIFY_DONE;
1985
1986 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1987 return NOTIFY_DONE;
1988
1989 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1990 return NOTIFY_DONE;
1991
1992 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1993 memcpy(sdata->name, dev->name, IFNAMSIZ);
1994 ieee80211_debugfs_rename_netdev(sdata);
1995
1996 return NOTIFY_OK;
1997 }
1998
1999 static struct notifier_block mac80211_netdev_notifier = {
2000 .notifier_call = netdev_notify,
2001 };
2002
2003 int ieee80211_iface_init(void)
2004 {
2005 return register_netdevice_notifier(&mac80211_netdev_notifier);
2006 }
2007
2008 void ieee80211_iface_exit(void)
2009 {
2010 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2011 }
2012
2013 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2014 {
2015 if (sdata->vif.type == NL80211_IFTYPE_AP)
2016 atomic_inc(&sdata->u.ap.num_mcast_sta);
2017 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2018 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2019 }
2020
2021 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2022 {
2023 if (sdata->vif.type == NL80211_IFTYPE_AP)
2024 atomic_dec(&sdata->u.ap.num_mcast_sta);
2025 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2026 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2027 }
Linux with added FPC-III support