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[mirror_ubuntu-jammy-kernel.git] / net / mac80211 / iface.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Interface handling
4 *
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018-2020 Intel Corporation
12 */
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
21 #include "sta_info.h"
22 #include "debugfs_netdev.h"
23 #include "mesh.h"
24 #include "led.h"
25 #include "driver-ops.h"
26 #include "wme.h"
27 #include "rate.h"
28
29 /**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
45 static void ieee80211_iface_work(struct work_struct *work);
46
47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
48 {
49 struct ieee80211_chanctx_conf *chanctx_conf;
50 int power;
51
52 rcu_read_lock();
53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
54 if (!chanctx_conf) {
55 rcu_read_unlock();
56 return false;
57 }
58
59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
60 rcu_read_unlock();
61
62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->user_power_level);
64
65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->ap_power_level);
67
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
71 return true;
72 }
73
74 return false;
75 }
76
77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
78 bool update_bss)
79 {
80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
83 }
84
85 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
86 {
87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
88 return 0;
89
90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
91 return IEEE80211_CONF_CHANGE_IDLE;
92 }
93
94 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
95 {
96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
97 return 0;
98
99 ieee80211_flush_queues(local, NULL, false);
100
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
103 }
104
105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
106 bool force_active)
107 {
108 bool working, scanning, active;
109 unsigned int led_trig_start = 0, led_trig_stop = 0;
110
111 lockdep_assert_held(&local->mtx);
112
113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
115 local->monitors;
116
117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
119
120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122
123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 else
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127
128 if (active)
129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 else
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134
135 if (working || scanning || active)
136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
138 }
139
140 u32 ieee80211_idle_off(struct ieee80211_local *local)
141 {
142 return __ieee80211_recalc_idle(local, true);
143 }
144
145 void ieee80211_recalc_idle(struct ieee80211_local *local)
146 {
147 u32 change = __ieee80211_recalc_idle(local, false);
148 if (change)
149 ieee80211_hw_config(local, change);
150 }
151
152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
153 bool check_dup)
154 {
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
157 u64 new, mask, tmp;
158 u8 *m;
159 int ret = 0;
160
161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
162 return 0;
163
164 m = addr;
165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
168
169 m = local->hw.wiphy->addr_mask;
170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
173
174 if (!check_dup)
175 return ret;
176
177 mutex_lock(&local->iflist_mtx);
178 list_for_each_entry(iter, &local->interfaces, list) {
179 if (iter == sdata)
180 continue;
181
182 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
184 continue;
185
186 m = iter->vif.addr;
187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
190
191 if ((new & ~mask) != (tmp & ~mask)) {
192 ret = -EINVAL;
193 break;
194 }
195 }
196 mutex_unlock(&local->iflist_mtx);
197
198 return ret;
199 }
200
201 static int ieee80211_change_mac(struct net_device *dev, void *addr)
202 {
203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
204 struct sockaddr *sa = addr;
205 bool check_dup = true;
206 int ret;
207
208 if (ieee80211_sdata_running(sdata))
209 return -EBUSY;
210
211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
213 check_dup = false;
214
215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
216 if (ret)
217 return ret;
218
219 ret = eth_mac_addr(dev, sa);
220
221 if (ret == 0)
222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
223
224 return ret;
225 }
226
227 static inline int identical_mac_addr_allowed(int type1, int type2)
228 {
229 return type1 == NL80211_IFTYPE_MONITOR ||
230 type2 == NL80211_IFTYPE_MONITOR ||
231 type1 == NL80211_IFTYPE_P2P_DEVICE ||
232 type2 == NL80211_IFTYPE_P2P_DEVICE ||
233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
234 (type1 == NL80211_IFTYPE_WDS &&
235 (type2 == NL80211_IFTYPE_WDS ||
236 type2 == NL80211_IFTYPE_AP)) ||
237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
238 (type1 == NL80211_IFTYPE_AP_VLAN &&
239 (type2 == NL80211_IFTYPE_AP ||
240 type2 == NL80211_IFTYPE_AP_VLAN));
241 }
242
243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
244 enum nl80211_iftype iftype)
245 {
246 struct ieee80211_local *local = sdata->local;
247 struct ieee80211_sub_if_data *nsdata;
248 int ret;
249
250 ASSERT_RTNL();
251
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
255 /*
256 * Only OCB and monitor mode may coexist
257 */
258 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
260 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
261 nsdata->vif.type == NL80211_IFTYPE_OCB))
262 return -EBUSY;
263
264 /*
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
268 *
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
273 */
274 if (iftype == NL80211_IFTYPE_ADHOC &&
275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
276 return -EBUSY;
277 /*
278 * will not add another interface while any channel
279 * switch is active.
280 */
281 if (nsdata->vif.csa_active)
282 return -EBUSY;
283
284 /*
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
287 */
288 if (!ether_addr_equal(sdata->vif.addr,
289 nsdata->vif.addr))
290 continue;
291
292 /*
293 * check whether it may have the same address
294 */
295 if (!identical_mac_addr_allowed(iftype,
296 nsdata->vif.type))
297 return -ENOTUNIQ;
298
299 /*
300 * can only add VLANs to enabled APs
301 */
302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
305 }
306 }
307
308 mutex_lock(&local->chanctx_mtx);
309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
310 mutex_unlock(&local->chanctx_mtx);
311 return ret;
312 }
313
314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
315 enum nl80211_iftype iftype)
316 {
317 int n_queues = sdata->local->hw.queues;
318 int i;
319
320 if (iftype == NL80211_IFTYPE_NAN)
321 return 0;
322
323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
324 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
326 IEEE80211_INVAL_HW_QUEUE))
327 return -EINVAL;
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
329 n_queues))
330 return -EINVAL;
331 }
332 }
333
334 if ((iftype != NL80211_IFTYPE_AP &&
335 iftype != NL80211_IFTYPE_P2P_GO &&
336 iftype != NL80211_IFTYPE_MESH_POINT) ||
337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
339 return 0;
340 }
341
342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
343 return -EINVAL;
344
345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
346 return -EINVAL;
347
348 return 0;
349 }
350
351 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
352 const int offset)
353 {
354 struct ieee80211_local *local = sdata->local;
355 u32 flags = sdata->u.mntr.flags;
356
357 #define ADJUST(_f, _s) do { \
358 if (flags & MONITOR_FLAG_##_f) \
359 local->fif_##_s += offset; \
360 } while (0)
361
362 ADJUST(FCSFAIL, fcsfail);
363 ADJUST(PLCPFAIL, plcpfail);
364 ADJUST(CONTROL, control);
365 ADJUST(CONTROL, pspoll);
366 ADJUST(OTHER_BSS, other_bss);
367
368 #undef ADJUST
369 }
370
371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
372 {
373 struct ieee80211_local *local = sdata->local;
374 int i;
375
376 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
379 else if (local->hw.queues >= IEEE80211_NUM_ACS)
380 sdata->vif.hw_queue[i] = i;
381 else
382 sdata->vif.hw_queue[i] = 0;
383 }
384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
385 }
386
387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
388 {
389 struct ieee80211_sub_if_data *sdata;
390 int ret;
391
392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
393 return 0;
394
395 ASSERT_RTNL();
396
397 if (local->monitor_sdata)
398 return 0;
399
400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
401 if (!sdata)
402 return -ENOMEM;
403
404 /* set up data */
405 sdata->local = local;
406 sdata->vif.type = NL80211_IFTYPE_MONITOR;
407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
408 wiphy_name(local->hw.wiphy));
409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
410
411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
412
413 ieee80211_set_default_queues(sdata);
414
415 ret = drv_add_interface(local, sdata);
416 if (WARN_ON(ret)) {
417 /* ok .. stupid driver, it asked for this! */
418 kfree(sdata);
419 return ret;
420 }
421
422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
423 if (ret) {
424 kfree(sdata);
425 return ret;
426 }
427
428 mutex_lock(&local->iflist_mtx);
429 rcu_assign_pointer(local->monitor_sdata, sdata);
430 mutex_unlock(&local->iflist_mtx);
431
432 mutex_lock(&local->mtx);
433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
434 IEEE80211_CHANCTX_EXCLUSIVE);
435 mutex_unlock(&local->mtx);
436 if (ret) {
437 mutex_lock(&local->iflist_mtx);
438 RCU_INIT_POINTER(local->monitor_sdata, NULL);
439 mutex_unlock(&local->iflist_mtx);
440 synchronize_net();
441 drv_remove_interface(local, sdata);
442 kfree(sdata);
443 return ret;
444 }
445
446 skb_queue_head_init(&sdata->skb_queue);
447 INIT_WORK(&sdata->work, ieee80211_iface_work);
448
449 return 0;
450 }
451
452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
453 {
454 struct ieee80211_sub_if_data *sdata;
455
456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
457 return;
458
459 ASSERT_RTNL();
460
461 mutex_lock(&local->iflist_mtx);
462
463 sdata = rcu_dereference_protected(local->monitor_sdata,
464 lockdep_is_held(&local->iflist_mtx));
465 if (!sdata) {
466 mutex_unlock(&local->iflist_mtx);
467 return;
468 }
469
470 RCU_INIT_POINTER(local->monitor_sdata, NULL);
471 mutex_unlock(&local->iflist_mtx);
472
473 synchronize_net();
474
475 mutex_lock(&local->mtx);
476 ieee80211_vif_release_channel(sdata);
477 mutex_unlock(&local->mtx);
478
479 drv_remove_interface(local, sdata);
480
481 kfree(sdata);
482 }
483
484 /*
485 * NOTE: Be very careful when changing this function, it must NOT return
486 * an error on interface type changes that have been pre-checked, so most
487 * checks should be in ieee80211_check_concurrent_iface.
488 */
489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
490 {
491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
492 struct net_device *dev = wdev->netdev;
493 struct ieee80211_local *local = sdata->local;
494 struct sta_info *sta;
495 u32 changed = 0;
496 int res;
497 u32 hw_reconf_flags = 0;
498
499 switch (sdata->vif.type) {
500 case NL80211_IFTYPE_WDS:
501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
502 return -ENOLINK;
503 break;
504 case NL80211_IFTYPE_AP_VLAN: {
505 struct ieee80211_sub_if_data *master;
506
507 if (!sdata->bss)
508 return -ENOLINK;
509
510 mutex_lock(&local->mtx);
511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
512 mutex_unlock(&local->mtx);
513
514 master = container_of(sdata->bss,
515 struct ieee80211_sub_if_data, u.ap);
516 sdata->control_port_protocol =
517 master->control_port_protocol;
518 sdata->control_port_no_encrypt =
519 master->control_port_no_encrypt;
520 sdata->control_port_over_nl80211 =
521 master->control_port_over_nl80211;
522 sdata->control_port_no_preauth =
523 master->control_port_no_preauth;
524 sdata->vif.cab_queue = master->vif.cab_queue;
525 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
526 sizeof(sdata->vif.hw_queue));
527 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
528
529 mutex_lock(&local->key_mtx);
530 sdata->crypto_tx_tailroom_needed_cnt +=
531 master->crypto_tx_tailroom_needed_cnt;
532 mutex_unlock(&local->key_mtx);
533
534 break;
535 }
536 case NL80211_IFTYPE_AP:
537 sdata->bss = &sdata->u.ap;
538 break;
539 case NL80211_IFTYPE_MESH_POINT:
540 case NL80211_IFTYPE_STATION:
541 case NL80211_IFTYPE_MONITOR:
542 case NL80211_IFTYPE_ADHOC:
543 case NL80211_IFTYPE_P2P_DEVICE:
544 case NL80211_IFTYPE_OCB:
545 case NL80211_IFTYPE_NAN:
546 /* no special treatment */
547 break;
548 case NL80211_IFTYPE_UNSPECIFIED:
549 case NUM_NL80211_IFTYPES:
550 case NL80211_IFTYPE_P2P_CLIENT:
551 case NL80211_IFTYPE_P2P_GO:
552 /* cannot happen */
553 WARN_ON(1);
554 break;
555 }
556
557 if (local->open_count == 0) {
558 res = drv_start(local);
559 if (res)
560 goto err_del_bss;
561 /* we're brought up, everything changes */
562 hw_reconf_flags = ~0;
563 ieee80211_led_radio(local, true);
564 ieee80211_mod_tpt_led_trig(local,
565 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
566 }
567
568 /*
569 * Copy the hopefully now-present MAC address to
570 * this interface, if it has the special null one.
571 */
572 if (dev && is_zero_ether_addr(dev->dev_addr)) {
573 memcpy(dev->dev_addr,
574 local->hw.wiphy->perm_addr,
575 ETH_ALEN);
576 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
577
578 if (!is_valid_ether_addr(dev->dev_addr)) {
579 res = -EADDRNOTAVAIL;
580 goto err_stop;
581 }
582 }
583
584 switch (sdata->vif.type) {
585 case NL80211_IFTYPE_AP_VLAN:
586 /* no need to tell driver, but set carrier and chanctx */
587 if (rtnl_dereference(sdata->bss->beacon)) {
588 ieee80211_vif_vlan_copy_chanctx(sdata);
589 netif_carrier_on(dev);
590 } else {
591 netif_carrier_off(dev);
592 }
593 break;
594 case NL80211_IFTYPE_MONITOR:
595 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
596 local->cooked_mntrs++;
597 break;
598 }
599
600 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
601 res = drv_add_interface(local, sdata);
602 if (res)
603 goto err_stop;
604 } else if (local->monitors == 0 && local->open_count == 0) {
605 res = ieee80211_add_virtual_monitor(local);
606 if (res)
607 goto err_stop;
608 }
609
610 /* must be before the call to ieee80211_configure_filter */
611 local->monitors++;
612 if (local->monitors == 1) {
613 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
614 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
615 }
616
617 ieee80211_adjust_monitor_flags(sdata, 1);
618 ieee80211_configure_filter(local);
619 mutex_lock(&local->mtx);
620 ieee80211_recalc_idle(local);
621 mutex_unlock(&local->mtx);
622
623 netif_carrier_on(dev);
624 break;
625 default:
626 if (coming_up) {
627 ieee80211_del_virtual_monitor(local);
628
629 res = drv_add_interface(local, sdata);
630 if (res)
631 goto err_stop;
632 res = ieee80211_check_queues(sdata,
633 ieee80211_vif_type_p2p(&sdata->vif));
634 if (res)
635 goto err_del_interface;
636 }
637
638 if (sdata->vif.type == NL80211_IFTYPE_AP) {
639 local->fif_pspoll++;
640 local->fif_probe_req++;
641
642 ieee80211_configure_filter(local);
643 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
644 local->fif_probe_req++;
645 }
646
647 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
648 sdata->vif.type != NL80211_IFTYPE_NAN)
649 changed |= ieee80211_reset_erp_info(sdata);
650 ieee80211_bss_info_change_notify(sdata, changed);
651
652 switch (sdata->vif.type) {
653 case NL80211_IFTYPE_STATION:
654 case NL80211_IFTYPE_ADHOC:
655 case NL80211_IFTYPE_AP:
656 case NL80211_IFTYPE_MESH_POINT:
657 case NL80211_IFTYPE_OCB:
658 netif_carrier_off(dev);
659 break;
660 case NL80211_IFTYPE_WDS:
661 case NL80211_IFTYPE_P2P_DEVICE:
662 case NL80211_IFTYPE_NAN:
663 break;
664 default:
665 /* not reached */
666 WARN_ON(1);
667 }
668
669 /*
670 * Set default queue parameters so drivers don't
671 * need to initialise the hardware if the hardware
672 * doesn't start up with sane defaults.
673 * Enable QoS for anything but station interfaces.
674 */
675 ieee80211_set_wmm_default(sdata, true,
676 sdata->vif.type != NL80211_IFTYPE_STATION);
677 }
678
679 set_bit(SDATA_STATE_RUNNING, &sdata->state);
680
681 switch (sdata->vif.type) {
682 case NL80211_IFTYPE_WDS:
683 /* Create STA entry for the WDS peer */
684 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
685 GFP_KERNEL);
686 if (!sta) {
687 res = -ENOMEM;
688 goto err_del_interface;
689 }
690
691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
692 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
693 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
694
695 res = sta_info_insert(sta);
696 if (res) {
697 /* STA has been freed */
698 goto err_del_interface;
699 }
700
701 rate_control_rate_init(sta);
702 netif_carrier_on(dev);
703 break;
704 case NL80211_IFTYPE_P2P_DEVICE:
705 rcu_assign_pointer(local->p2p_sdata, sdata);
706 break;
707 case NL80211_IFTYPE_MONITOR:
708 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
709 break;
710 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
711 break;
712 default:
713 break;
714 }
715
716 /*
717 * set_multicast_list will be invoked by the networking core
718 * which will check whether any increments here were done in
719 * error and sync them down to the hardware as filter flags.
720 */
721 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
722 atomic_inc(&local->iff_allmultis);
723
724 if (coming_up)
725 local->open_count++;
726
727 if (hw_reconf_flags)
728 ieee80211_hw_config(local, hw_reconf_flags);
729
730 ieee80211_recalc_ps(local);
731
732 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
733 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
734 local->ops->wake_tx_queue) {
735 /* XXX: for AP_VLAN, actually track AP queues */
736 if (dev)
737 netif_tx_start_all_queues(dev);
738 } else if (dev) {
739 unsigned long flags;
740 int n_acs = IEEE80211_NUM_ACS;
741 int ac;
742
743 if (local->hw.queues < IEEE80211_NUM_ACS)
744 n_acs = 1;
745
746 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
747 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
748 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
749 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
750 for (ac = 0; ac < n_acs; ac++) {
751 int ac_queue = sdata->vif.hw_queue[ac];
752
753 if (local->queue_stop_reasons[ac_queue] == 0 &&
754 skb_queue_empty(&local->pending[ac_queue]))
755 netif_start_subqueue(dev, ac);
756 }
757 }
758 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
759 }
760
761 return 0;
762 err_del_interface:
763 drv_remove_interface(local, sdata);
764 err_stop:
765 if (!local->open_count)
766 drv_stop(local);
767 err_del_bss:
768 sdata->bss = NULL;
769 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
770 mutex_lock(&local->mtx);
771 list_del(&sdata->u.vlan.list);
772 mutex_unlock(&local->mtx);
773 }
774 /* might already be clear but that doesn't matter */
775 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
776 return res;
777 }
778
779 static int ieee80211_open(struct net_device *dev)
780 {
781 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
782 int err;
783
784 /* fail early if user set an invalid address */
785 if (!is_valid_ether_addr(dev->dev_addr))
786 return -EADDRNOTAVAIL;
787
788 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
789 if (err)
790 return err;
791
792 return ieee80211_do_open(&sdata->wdev, true);
793 }
794
795 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
796 bool going_down)
797 {
798 struct ieee80211_local *local = sdata->local;
799 unsigned long flags;
800 struct sk_buff *skb, *tmp;
801 u32 hw_reconf_flags = 0;
802 int i, flushed;
803 struct ps_data *ps;
804 struct cfg80211_chan_def chandef;
805 bool cancel_scan;
806 struct cfg80211_nan_func *func;
807
808 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
809
810 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
811 if (cancel_scan)
812 ieee80211_scan_cancel(local);
813
814 /*
815 * Stop TX on this interface first.
816 */
817 if (sdata->dev)
818 netif_tx_stop_all_queues(sdata->dev);
819
820 ieee80211_roc_purge(local, sdata);
821
822 switch (sdata->vif.type) {
823 case NL80211_IFTYPE_STATION:
824 ieee80211_mgd_stop(sdata);
825 break;
826 case NL80211_IFTYPE_ADHOC:
827 ieee80211_ibss_stop(sdata);
828 break;
829 case NL80211_IFTYPE_MONITOR:
830 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
831 break;
832 list_del_rcu(&sdata->u.mntr.list);
833 break;
834 default:
835 break;
836 }
837
838 /*
839 * Remove all stations associated with this interface.
840 *
841 * This must be done before calling ops->remove_interface()
842 * because otherwise we can later invoke ops->sta_notify()
843 * whenever the STAs are removed, and that invalidates driver
844 * assumptions about always getting a vif pointer that is valid
845 * (because if we remove a STA after ops->remove_interface()
846 * the driver will have removed the vif info already!)
847 *
848 * In WDS mode a station must exist here and be flushed, for
849 * AP_VLANs stations may exist since there's nothing else that
850 * would have removed them, but in other modes there shouldn't
851 * be any stations.
852 */
853 flushed = sta_info_flush(sdata);
854 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
855 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
856 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
857
858 /* don't count this interface for allmulti while it is down */
859 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
860 atomic_dec(&local->iff_allmultis);
861
862 if (sdata->vif.type == NL80211_IFTYPE_AP) {
863 local->fif_pspoll--;
864 local->fif_probe_req--;
865 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
866 local->fif_probe_req--;
867 }
868
869 if (sdata->dev) {
870 netif_addr_lock_bh(sdata->dev);
871 spin_lock_bh(&local->filter_lock);
872 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
873 sdata->dev->addr_len);
874 spin_unlock_bh(&local->filter_lock);
875 netif_addr_unlock_bh(sdata->dev);
876 }
877
878 del_timer_sync(&local->dynamic_ps_timer);
879 cancel_work_sync(&local->dynamic_ps_enable_work);
880
881 cancel_work_sync(&sdata->recalc_smps);
882 sdata_lock(sdata);
883 mutex_lock(&local->mtx);
884 sdata->vif.csa_active = false;
885 if (sdata->vif.type == NL80211_IFTYPE_STATION)
886 sdata->u.mgd.csa_waiting_bcn = false;
887 if (sdata->csa_block_tx) {
888 ieee80211_wake_vif_queues(local, sdata,
889 IEEE80211_QUEUE_STOP_REASON_CSA);
890 sdata->csa_block_tx = false;
891 }
892 mutex_unlock(&local->mtx);
893 sdata_unlock(sdata);
894
895 cancel_work_sync(&sdata->csa_finalize_work);
896
897 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
898
899 if (sdata->wdev.cac_started) {
900 chandef = sdata->vif.bss_conf.chandef;
901 WARN_ON(local->suspended);
902 mutex_lock(&local->mtx);
903 ieee80211_vif_release_channel(sdata);
904 mutex_unlock(&local->mtx);
905 cfg80211_cac_event(sdata->dev, &chandef,
906 NL80211_RADAR_CAC_ABORTED,
907 GFP_KERNEL);
908 }
909
910 /* APs need special treatment */
911 if (sdata->vif.type == NL80211_IFTYPE_AP) {
912 struct ieee80211_sub_if_data *vlan, *tmpsdata;
913
914 /* down all dependent devices, that is VLANs */
915 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
916 u.vlan.list)
917 dev_close(vlan->dev);
918 WARN_ON(!list_empty(&sdata->u.ap.vlans));
919 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
920 /* remove all packets in parent bc_buf pointing to this dev */
921 ps = &sdata->bss->ps;
922
923 spin_lock_irqsave(&ps->bc_buf.lock, flags);
924 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
925 if (skb->dev == sdata->dev) {
926 __skb_unlink(skb, &ps->bc_buf);
927 local->total_ps_buffered--;
928 ieee80211_free_txskb(&local->hw, skb);
929 }
930 }
931 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
932 }
933
934 if (going_down)
935 local->open_count--;
936
937 switch (sdata->vif.type) {
938 case NL80211_IFTYPE_AP_VLAN:
939 mutex_lock(&local->mtx);
940 list_del(&sdata->u.vlan.list);
941 mutex_unlock(&local->mtx);
942 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
943 /* see comment in the default case below */
944 ieee80211_free_keys(sdata, true);
945 /* no need to tell driver */
946 break;
947 case NL80211_IFTYPE_MONITOR:
948 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
949 local->cooked_mntrs--;
950 break;
951 }
952
953 local->monitors--;
954 if (local->monitors == 0) {
955 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
956 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
957 }
958
959 ieee80211_adjust_monitor_flags(sdata, -1);
960 break;
961 case NL80211_IFTYPE_NAN:
962 /* clean all the functions */
963 spin_lock_bh(&sdata->u.nan.func_lock);
964
965 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
966 idr_remove(&sdata->u.nan.function_inst_ids, i);
967 cfg80211_free_nan_func(func);
968 }
969 idr_destroy(&sdata->u.nan.function_inst_ids);
970
971 spin_unlock_bh(&sdata->u.nan.func_lock);
972 break;
973 case NL80211_IFTYPE_P2P_DEVICE:
974 /* relies on synchronize_rcu() below */
975 RCU_INIT_POINTER(local->p2p_sdata, NULL);
976 /* fall through */
977 default:
978 cancel_work_sync(&sdata->work);
979 /*
980 * When we get here, the interface is marked down.
981 * Free the remaining keys, if there are any
982 * (which can happen in AP mode if userspace sets
983 * keys before the interface is operating, and maybe
984 * also in WDS mode)
985 *
986 * Force the key freeing to always synchronize_net()
987 * to wait for the RX path in case it is using this
988 * interface enqueuing frames at this very time on
989 * another CPU.
990 */
991 ieee80211_free_keys(sdata, true);
992 skb_queue_purge(&sdata->skb_queue);
993 }
994
995 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
996 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
997 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
998 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
999 if (info->control.vif == &sdata->vif) {
1000 __skb_unlink(skb, &local->pending[i]);
1001 ieee80211_free_txskb(&local->hw, skb);
1002 }
1003 }
1004 }
1005 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1006
1007 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1008 ieee80211_txq_remove_vlan(local, sdata);
1009
1010 sdata->bss = NULL;
1011
1012 if (local->open_count == 0)
1013 ieee80211_clear_tx_pending(local);
1014
1015 sdata->vif.bss_conf.beacon_int = 0;
1016
1017 /*
1018 * If the interface goes down while suspended, presumably because
1019 * the device was unplugged and that happens before our resume,
1020 * then the driver is already unconfigured and the remainder of
1021 * this function isn't needed.
1022 * XXX: what about WoWLAN? If the device has software state, e.g.
1023 * memory allocated, it might expect teardown commands from
1024 * mac80211 here?
1025 */
1026 if (local->suspended) {
1027 WARN_ON(local->wowlan);
1028 WARN_ON(rtnl_dereference(local->monitor_sdata));
1029 return;
1030 }
1031
1032 switch (sdata->vif.type) {
1033 case NL80211_IFTYPE_AP_VLAN:
1034 break;
1035 case NL80211_IFTYPE_MONITOR:
1036 if (local->monitors == 0)
1037 ieee80211_del_virtual_monitor(local);
1038
1039 mutex_lock(&local->mtx);
1040 ieee80211_recalc_idle(local);
1041 mutex_unlock(&local->mtx);
1042
1043 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1044 break;
1045
1046 /* fall through */
1047 default:
1048 if (going_down)
1049 drv_remove_interface(local, sdata);
1050 }
1051
1052 ieee80211_recalc_ps(local);
1053
1054 if (cancel_scan)
1055 flush_delayed_work(&local->scan_work);
1056
1057 if (local->open_count == 0) {
1058 ieee80211_stop_device(local);
1059
1060 /* no reconfiguring after stop! */
1061 return;
1062 }
1063
1064 /* do after stop to avoid reconfiguring when we stop anyway */
1065 ieee80211_configure_filter(local);
1066 ieee80211_hw_config(local, hw_reconf_flags);
1067
1068 if (local->monitors == local->open_count)
1069 ieee80211_add_virtual_monitor(local);
1070 }
1071
1072 static int ieee80211_stop(struct net_device *dev)
1073 {
1074 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1075
1076 ieee80211_do_stop(sdata, true);
1077
1078 return 0;
1079 }
1080
1081 static void ieee80211_set_multicast_list(struct net_device *dev)
1082 {
1083 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1084 struct ieee80211_local *local = sdata->local;
1085 int allmulti, sdata_allmulti;
1086
1087 allmulti = !!(dev->flags & IFF_ALLMULTI);
1088 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1089
1090 if (allmulti != sdata_allmulti) {
1091 if (dev->flags & IFF_ALLMULTI)
1092 atomic_inc(&local->iff_allmultis);
1093 else
1094 atomic_dec(&local->iff_allmultis);
1095 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1096 }
1097
1098 spin_lock_bh(&local->filter_lock);
1099 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1100 spin_unlock_bh(&local->filter_lock);
1101 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1102 }
1103
1104 /*
1105 * Called when the netdev is removed or, by the code below, before
1106 * the interface type changes.
1107 */
1108 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1109 {
1110 int i;
1111
1112 /* free extra data */
1113 ieee80211_free_keys(sdata, false);
1114
1115 ieee80211_debugfs_remove_netdev(sdata);
1116
1117 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1118 __skb_queue_purge(&sdata->fragments[i].skb_list);
1119 sdata->fragment_next = 0;
1120
1121 if (ieee80211_vif_is_mesh(&sdata->vif))
1122 ieee80211_mesh_teardown_sdata(sdata);
1123 }
1124
1125 static void ieee80211_uninit(struct net_device *dev)
1126 {
1127 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1128 }
1129
1130 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1131 struct sk_buff *skb,
1132 struct net_device *sb_dev)
1133 {
1134 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1135 }
1136
1137 static void
1138 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1139 {
1140 int i;
1141
1142 for_each_possible_cpu(i) {
1143 const struct pcpu_sw_netstats *tstats;
1144 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1145 unsigned int start;
1146
1147 tstats = per_cpu_ptr(dev->tstats, i);
1148
1149 do {
1150 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1151 rx_packets = tstats->rx_packets;
1152 tx_packets = tstats->tx_packets;
1153 rx_bytes = tstats->rx_bytes;
1154 tx_bytes = tstats->tx_bytes;
1155 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1156
1157 stats->rx_packets += rx_packets;
1158 stats->tx_packets += tx_packets;
1159 stats->rx_bytes += rx_bytes;
1160 stats->tx_bytes += tx_bytes;
1161 }
1162 }
1163
1164 static const struct net_device_ops ieee80211_dataif_ops = {
1165 .ndo_open = ieee80211_open,
1166 .ndo_stop = ieee80211_stop,
1167 .ndo_uninit = ieee80211_uninit,
1168 .ndo_start_xmit = ieee80211_subif_start_xmit,
1169 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1170 .ndo_set_mac_address = ieee80211_change_mac,
1171 .ndo_select_queue = ieee80211_netdev_select_queue,
1172 .ndo_get_stats64 = ieee80211_get_stats64,
1173 };
1174
1175 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1176 struct sk_buff *skb,
1177 struct net_device *sb_dev)
1178 {
1179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1180 struct ieee80211_local *local = sdata->local;
1181 struct ieee80211_hdr *hdr;
1182 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1183
1184 if (local->hw.queues < IEEE80211_NUM_ACS)
1185 return 0;
1186
1187 if (skb->len < 4 ||
1188 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1189 return 0; /* doesn't matter, frame will be dropped */
1190
1191 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1192
1193 return ieee80211_select_queue_80211(sdata, skb, hdr);
1194 }
1195
1196 static const struct net_device_ops ieee80211_monitorif_ops = {
1197 .ndo_open = ieee80211_open,
1198 .ndo_stop = ieee80211_stop,
1199 .ndo_uninit = ieee80211_uninit,
1200 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1201 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1202 .ndo_set_mac_address = ieee80211_change_mac,
1203 .ndo_select_queue = ieee80211_monitor_select_queue,
1204 .ndo_get_stats64 = ieee80211_get_stats64,
1205 };
1206
1207 static const struct net_device_ops ieee80211_dataif_8023_ops = {
1208 .ndo_open = ieee80211_open,
1209 .ndo_stop = ieee80211_stop,
1210 .ndo_uninit = ieee80211_uninit,
1211 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1212 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1213 .ndo_set_mac_address = ieee80211_change_mac,
1214 .ndo_select_queue = ieee80211_netdev_select_queue,
1215 .ndo_get_stats64 = ieee80211_get_stats64,
1216 };
1217
1218 static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata,
1219 bool enable)
1220 {
1221 sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops :
1222 &ieee80211_dataif_ops;
1223 sdata->hw_80211_encap = enable;
1224 }
1225
1226 bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable)
1227 {
1228 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1229 struct ieee80211_local *local = sdata->local;
1230 struct ieee80211_sub_if_data *iter;
1231 struct ieee80211_key *key;
1232
1233 mutex_lock(&local->iflist_mtx);
1234 list_for_each_entry(iter, &local->interfaces, list) {
1235 struct ieee80211_sub_if_data *disable = NULL;
1236
1237 if (vif->type == NL80211_IFTYPE_MONITOR) {
1238 disable = iter;
1239 __ieee80211_set_hw_80211_encap(iter, false);
1240 } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) {
1241 disable = sdata;
1242 enable = false;
1243 }
1244 if (disable)
1245 sdata_dbg(disable,
1246 "disable hw 80211 encap due to mon co-exist\n");
1247 }
1248 mutex_unlock(&local->iflist_mtx);
1249
1250 if (enable == sdata->hw_80211_encap)
1251 return enable;
1252
1253 if (!sdata->dev)
1254 return false;
1255
1256 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1257 (local->hw.wiphy->frag_threshold != (u32)-1))
1258 enable = false;
1259
1260 mutex_lock(&sdata->local->key_mtx);
1261 list_for_each_entry(key, &sdata->key_list, list) {
1262 if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
1263 enable = false;
1264 }
1265 mutex_unlock(&sdata->local->key_mtx);
1266
1267 __ieee80211_set_hw_80211_encap(sdata, enable);
1268
1269 return enable;
1270 }
1271 EXPORT_SYMBOL(ieee80211_set_hw_80211_encap);
1272
1273 static void ieee80211_if_free(struct net_device *dev)
1274 {
1275 free_percpu(dev->tstats);
1276 }
1277
1278 static void ieee80211_if_setup(struct net_device *dev)
1279 {
1280 ether_setup(dev);
1281 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1282 dev->netdev_ops = &ieee80211_dataif_ops;
1283 dev->needs_free_netdev = true;
1284 dev->priv_destructor = ieee80211_if_free;
1285 }
1286
1287 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1288 {
1289 ieee80211_if_setup(dev);
1290 dev->priv_flags |= IFF_NO_QUEUE;
1291 }
1292
1293 static void ieee80211_iface_work(struct work_struct *work)
1294 {
1295 struct ieee80211_sub_if_data *sdata =
1296 container_of(work, struct ieee80211_sub_if_data, work);
1297 struct ieee80211_local *local = sdata->local;
1298 struct sk_buff *skb;
1299 struct sta_info *sta;
1300
1301 if (!ieee80211_sdata_running(sdata))
1302 return;
1303
1304 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1305 return;
1306
1307 if (!ieee80211_can_run_worker(local))
1308 return;
1309
1310 /* first process frames */
1311 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1312 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1313
1314 if (ieee80211_is_action(mgmt->frame_control) &&
1315 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1316 int len = skb->len;
1317
1318 mutex_lock(&local->sta_mtx);
1319 sta = sta_info_get_bss(sdata, mgmt->sa);
1320 if (sta) {
1321 switch (mgmt->u.action.u.addba_req.action_code) {
1322 case WLAN_ACTION_ADDBA_REQ:
1323 ieee80211_process_addba_request(
1324 local, sta, mgmt, len);
1325 break;
1326 case WLAN_ACTION_ADDBA_RESP:
1327 ieee80211_process_addba_resp(local, sta,
1328 mgmt, len);
1329 break;
1330 case WLAN_ACTION_DELBA:
1331 ieee80211_process_delba(sdata, sta,
1332 mgmt, len);
1333 break;
1334 default:
1335 WARN_ON(1);
1336 break;
1337 }
1338 }
1339 mutex_unlock(&local->sta_mtx);
1340 } else if (ieee80211_is_action(mgmt->frame_control) &&
1341 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1342 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1343 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1344 struct ieee80211_rx_status *status;
1345 enum nl80211_band band;
1346 u8 opmode;
1347
1348 status = IEEE80211_SKB_RXCB(skb);
1349 band = status->band;
1350 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1351
1352 mutex_lock(&local->sta_mtx);
1353 sta = sta_info_get_bss(sdata, mgmt->sa);
1354
1355 if (sta)
1356 ieee80211_vht_handle_opmode(sdata, sta,
1357 opmode,
1358 band);
1359
1360 mutex_unlock(&local->sta_mtx);
1361 break;
1362 }
1363 case WLAN_VHT_ACTION_GROUPID_MGMT:
1364 ieee80211_process_mu_groups(sdata, mgmt);
1365 break;
1366 default:
1367 WARN_ON(1);
1368 break;
1369 }
1370 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1371 struct ieee80211_hdr *hdr = (void *)mgmt;
1372 /*
1373 * So the frame isn't mgmt, but frame_control
1374 * is at the right place anyway, of course, so
1375 * the if statement is correct.
1376 *
1377 * Warn if we have other data frame types here,
1378 * they must not get here.
1379 */
1380 WARN_ON(hdr->frame_control &
1381 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1382 WARN_ON(!(hdr->seq_ctrl &
1383 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1384 /*
1385 * This was a fragment of a frame, received while
1386 * a block-ack session was active. That cannot be
1387 * right, so terminate the session.
1388 */
1389 mutex_lock(&local->sta_mtx);
1390 sta = sta_info_get_bss(sdata, mgmt->sa);
1391 if (sta) {
1392 u16 tid = ieee80211_get_tid(hdr);
1393
1394 __ieee80211_stop_rx_ba_session(
1395 sta, tid, WLAN_BACK_RECIPIENT,
1396 WLAN_REASON_QSTA_REQUIRE_SETUP,
1397 true);
1398 }
1399 mutex_unlock(&local->sta_mtx);
1400 } else switch (sdata->vif.type) {
1401 case NL80211_IFTYPE_STATION:
1402 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1403 break;
1404 case NL80211_IFTYPE_ADHOC:
1405 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1406 break;
1407 case NL80211_IFTYPE_MESH_POINT:
1408 if (!ieee80211_vif_is_mesh(&sdata->vif))
1409 break;
1410 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1411 break;
1412 default:
1413 WARN(1, "frame for unexpected interface type");
1414 break;
1415 }
1416
1417 kfree_skb(skb);
1418 }
1419
1420 /* then other type-dependent work */
1421 switch (sdata->vif.type) {
1422 case NL80211_IFTYPE_STATION:
1423 ieee80211_sta_work(sdata);
1424 break;
1425 case NL80211_IFTYPE_ADHOC:
1426 ieee80211_ibss_work(sdata);
1427 break;
1428 case NL80211_IFTYPE_MESH_POINT:
1429 if (!ieee80211_vif_is_mesh(&sdata->vif))
1430 break;
1431 ieee80211_mesh_work(sdata);
1432 break;
1433 case NL80211_IFTYPE_OCB:
1434 ieee80211_ocb_work(sdata);
1435 break;
1436 default:
1437 break;
1438 }
1439 }
1440
1441 static void ieee80211_recalc_smps_work(struct work_struct *work)
1442 {
1443 struct ieee80211_sub_if_data *sdata =
1444 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1445
1446 ieee80211_recalc_smps(sdata);
1447 }
1448
1449 /*
1450 * Helper function to initialise an interface to a specific type.
1451 */
1452 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1453 enum nl80211_iftype type)
1454 {
1455 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1456 0xff, 0xff, 0xff};
1457
1458 /* clear type-dependent union */
1459 memset(&sdata->u, 0, sizeof(sdata->u));
1460
1461 /* and set some type-dependent values */
1462 sdata->vif.type = type;
1463 sdata->vif.p2p = false;
1464 sdata->wdev.iftype = type;
1465
1466 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1467 sdata->control_port_no_encrypt = false;
1468 sdata->control_port_over_nl80211 = false;
1469 sdata->control_port_no_preauth = false;
1470 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1471 sdata->vif.bss_conf.idle = true;
1472 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1473
1474 sdata->noack_map = 0;
1475 sdata->hw_80211_encap = false;
1476
1477 /* only monitor/p2p-device differ */
1478 if (sdata->dev) {
1479 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1480 sdata->dev->type = ARPHRD_ETHER;
1481 }
1482
1483 skb_queue_head_init(&sdata->skb_queue);
1484 INIT_WORK(&sdata->work, ieee80211_iface_work);
1485 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1486 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1487 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1488 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1489
1490 switch (type) {
1491 case NL80211_IFTYPE_P2P_GO:
1492 type = NL80211_IFTYPE_AP;
1493 sdata->vif.type = type;
1494 sdata->vif.p2p = true;
1495 /* fall through */
1496 case NL80211_IFTYPE_AP:
1497 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1498 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1499 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1500 break;
1501 case NL80211_IFTYPE_P2P_CLIENT:
1502 type = NL80211_IFTYPE_STATION;
1503 sdata->vif.type = type;
1504 sdata->vif.p2p = true;
1505 /* fall through */
1506 case NL80211_IFTYPE_STATION:
1507 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1508 ieee80211_sta_setup_sdata(sdata);
1509 break;
1510 case NL80211_IFTYPE_OCB:
1511 sdata->vif.bss_conf.bssid = bssid_wildcard;
1512 ieee80211_ocb_setup_sdata(sdata);
1513 break;
1514 case NL80211_IFTYPE_ADHOC:
1515 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1516 ieee80211_ibss_setup_sdata(sdata);
1517 break;
1518 case NL80211_IFTYPE_MESH_POINT:
1519 if (ieee80211_vif_is_mesh(&sdata->vif))
1520 ieee80211_mesh_init_sdata(sdata);
1521 break;
1522 case NL80211_IFTYPE_MONITOR:
1523 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1524 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1525 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1526 MONITOR_FLAG_OTHER_BSS;
1527 break;
1528 case NL80211_IFTYPE_WDS:
1529 sdata->vif.bss_conf.bssid = NULL;
1530 break;
1531 case NL80211_IFTYPE_NAN:
1532 idr_init(&sdata->u.nan.function_inst_ids);
1533 spin_lock_init(&sdata->u.nan.func_lock);
1534 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1535 break;
1536 case NL80211_IFTYPE_AP_VLAN:
1537 case NL80211_IFTYPE_P2P_DEVICE:
1538 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1539 break;
1540 case NL80211_IFTYPE_UNSPECIFIED:
1541 case NUM_NL80211_IFTYPES:
1542 WARN_ON(1);
1543 break;
1544 }
1545
1546 ieee80211_debugfs_add_netdev(sdata);
1547 }
1548
1549 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1550 enum nl80211_iftype type)
1551 {
1552 struct ieee80211_local *local = sdata->local;
1553 int ret, err;
1554 enum nl80211_iftype internal_type = type;
1555 bool p2p = false;
1556
1557 ASSERT_RTNL();
1558
1559 if (!local->ops->change_interface)
1560 return -EBUSY;
1561
1562 switch (sdata->vif.type) {
1563 case NL80211_IFTYPE_AP:
1564 case NL80211_IFTYPE_STATION:
1565 case NL80211_IFTYPE_ADHOC:
1566 case NL80211_IFTYPE_OCB:
1567 /*
1568 * Could maybe also all others here?
1569 * Just not sure how that interacts
1570 * with the RX/config path e.g. for
1571 * mesh.
1572 */
1573 break;
1574 default:
1575 return -EBUSY;
1576 }
1577
1578 switch (type) {
1579 case NL80211_IFTYPE_AP:
1580 case NL80211_IFTYPE_STATION:
1581 case NL80211_IFTYPE_ADHOC:
1582 case NL80211_IFTYPE_OCB:
1583 /*
1584 * Could probably support everything
1585 * but WDS here (WDS do_open can fail
1586 * under memory pressure, which this
1587 * code isn't prepared to handle).
1588 */
1589 break;
1590 case NL80211_IFTYPE_P2P_CLIENT:
1591 p2p = true;
1592 internal_type = NL80211_IFTYPE_STATION;
1593 break;
1594 case NL80211_IFTYPE_P2P_GO:
1595 p2p = true;
1596 internal_type = NL80211_IFTYPE_AP;
1597 break;
1598 default:
1599 return -EBUSY;
1600 }
1601
1602 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1603 if (ret)
1604 return ret;
1605
1606 ieee80211_do_stop(sdata, false);
1607
1608 ieee80211_teardown_sdata(sdata);
1609
1610 ret = drv_change_interface(local, sdata, internal_type, p2p);
1611 if (ret)
1612 type = ieee80211_vif_type_p2p(&sdata->vif);
1613
1614 /*
1615 * Ignore return value here, there's not much we can do since
1616 * the driver changed the interface type internally already.
1617 * The warnings will hopefully make driver authors fix it :-)
1618 */
1619 ieee80211_check_queues(sdata, type);
1620
1621 ieee80211_setup_sdata(sdata, type);
1622
1623 err = ieee80211_do_open(&sdata->wdev, false);
1624 WARN(err, "type change: do_open returned %d", err);
1625
1626 return ret;
1627 }
1628
1629 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1630 enum nl80211_iftype type)
1631 {
1632 int ret;
1633
1634 ASSERT_RTNL();
1635
1636 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1637 return 0;
1638
1639 if (ieee80211_sdata_running(sdata)) {
1640 ret = ieee80211_runtime_change_iftype(sdata, type);
1641 if (ret)
1642 return ret;
1643 } else {
1644 /* Purge and reset type-dependent state. */
1645 ieee80211_teardown_sdata(sdata);
1646 ieee80211_setup_sdata(sdata, type);
1647 }
1648
1649 /* reset some values that shouldn't be kept across type changes */
1650 if (type == NL80211_IFTYPE_STATION)
1651 sdata->u.mgd.use_4addr = false;
1652
1653 return 0;
1654 }
1655
1656 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1657 u8 *perm_addr, enum nl80211_iftype type)
1658 {
1659 struct ieee80211_sub_if_data *sdata;
1660 u64 mask, start, addr, val, inc;
1661 u8 *m;
1662 u8 tmp_addr[ETH_ALEN];
1663 int i;
1664
1665 /* default ... something at least */
1666 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1667
1668 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1669 local->hw.wiphy->n_addresses <= 1)
1670 return;
1671
1672 mutex_lock(&local->iflist_mtx);
1673
1674 switch (type) {
1675 case NL80211_IFTYPE_MONITOR:
1676 /* doesn't matter */
1677 break;
1678 case NL80211_IFTYPE_WDS:
1679 case NL80211_IFTYPE_AP_VLAN:
1680 /* match up with an AP interface */
1681 list_for_each_entry(sdata, &local->interfaces, list) {
1682 if (sdata->vif.type != NL80211_IFTYPE_AP)
1683 continue;
1684 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1685 break;
1686 }
1687 /* keep default if no AP interface present */
1688 break;
1689 case NL80211_IFTYPE_P2P_CLIENT:
1690 case NL80211_IFTYPE_P2P_GO:
1691 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1692 list_for_each_entry(sdata, &local->interfaces, list) {
1693 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1694 continue;
1695 if (!ieee80211_sdata_running(sdata))
1696 continue;
1697 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1698 goto out_unlock;
1699 }
1700 }
1701 /* fall through */
1702 default:
1703 /* assign a new address if possible -- try n_addresses first */
1704 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1705 bool used = false;
1706
1707 list_for_each_entry(sdata, &local->interfaces, list) {
1708 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1709 sdata->vif.addr)) {
1710 used = true;
1711 break;
1712 }
1713 }
1714
1715 if (!used) {
1716 memcpy(perm_addr,
1717 local->hw.wiphy->addresses[i].addr,
1718 ETH_ALEN);
1719 break;
1720 }
1721 }
1722
1723 /* try mask if available */
1724 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1725 break;
1726
1727 m = local->hw.wiphy->addr_mask;
1728 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1729 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1730 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1731
1732 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1733 /* not a contiguous mask ... not handled now! */
1734 pr_info("not contiguous\n");
1735 break;
1736 }
1737
1738 /*
1739 * Pick address of existing interface in case user changed
1740 * MAC address manually, default to perm_addr.
1741 */
1742 m = local->hw.wiphy->perm_addr;
1743 list_for_each_entry(sdata, &local->interfaces, list) {
1744 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1745 continue;
1746 m = sdata->vif.addr;
1747 break;
1748 }
1749 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1750 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1751 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1752
1753 inc = 1ULL<<__ffs64(mask);
1754 val = (start & mask);
1755 addr = (start & ~mask) | (val & mask);
1756 do {
1757 bool used = false;
1758
1759 tmp_addr[5] = addr >> 0*8;
1760 tmp_addr[4] = addr >> 1*8;
1761 tmp_addr[3] = addr >> 2*8;
1762 tmp_addr[2] = addr >> 3*8;
1763 tmp_addr[1] = addr >> 4*8;
1764 tmp_addr[0] = addr >> 5*8;
1765
1766 val += inc;
1767
1768 list_for_each_entry(sdata, &local->interfaces, list) {
1769 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1770 used = true;
1771 break;
1772 }
1773 }
1774
1775 if (!used) {
1776 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1777 break;
1778 }
1779 addr = (start & ~mask) | (val & mask);
1780 } while (addr != start);
1781
1782 break;
1783 }
1784
1785 out_unlock:
1786 mutex_unlock(&local->iflist_mtx);
1787 }
1788
1789 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1790 unsigned char name_assign_type,
1791 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1792 struct vif_params *params)
1793 {
1794 struct net_device *ndev = NULL;
1795 struct ieee80211_sub_if_data *sdata = NULL;
1796 struct txq_info *txqi;
1797 void (*if_setup)(struct net_device *dev);
1798 int ret, i;
1799 int txqs = 1;
1800
1801 ASSERT_RTNL();
1802
1803 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1804 struct wireless_dev *wdev;
1805
1806 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1807 GFP_KERNEL);
1808 if (!sdata)
1809 return -ENOMEM;
1810 wdev = &sdata->wdev;
1811
1812 sdata->dev = NULL;
1813 strlcpy(sdata->name, name, IFNAMSIZ);
1814 ieee80211_assign_perm_addr(local, wdev->address, type);
1815 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1816 } else {
1817 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1818 sizeof(void *));
1819 int txq_size = 0;
1820
1821 if (local->ops->wake_tx_queue &&
1822 type != NL80211_IFTYPE_AP_VLAN &&
1823 (type != NL80211_IFTYPE_MONITOR ||
1824 (params->flags & MONITOR_FLAG_ACTIVE)))
1825 txq_size += sizeof(struct txq_info) +
1826 local->hw.txq_data_size;
1827
1828 if (local->ops->wake_tx_queue) {
1829 if_setup = ieee80211_if_setup_no_queue;
1830 } else {
1831 if_setup = ieee80211_if_setup;
1832 if (local->hw.queues >= IEEE80211_NUM_ACS)
1833 txqs = IEEE80211_NUM_ACS;
1834 }
1835
1836 ndev = alloc_netdev_mqs(size + txq_size,
1837 name, name_assign_type,
1838 if_setup, txqs, 1);
1839 if (!ndev)
1840 return -ENOMEM;
1841
1842 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1843 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1844
1845 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1846
1847 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1848 if (!ndev->tstats) {
1849 free_netdev(ndev);
1850 return -ENOMEM;
1851 }
1852
1853 ndev->needed_headroom = local->tx_headroom +
1854 4*6 /* four MAC addresses */
1855 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1856 + 6 /* mesh */
1857 + 8 /* rfc1042/bridge tunnel */
1858 - ETH_HLEN /* ethernet hard_header_len */
1859 + IEEE80211_ENCRYPT_HEADROOM;
1860 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1861
1862 ret = dev_alloc_name(ndev, ndev->name);
1863 if (ret < 0) {
1864 ieee80211_if_free(ndev);
1865 free_netdev(ndev);
1866 return ret;
1867 }
1868
1869 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1870 if (is_valid_ether_addr(params->macaddr))
1871 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1872 else
1873 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1874 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1875
1876 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1877 sdata = netdev_priv(ndev);
1878 ndev->ieee80211_ptr = &sdata->wdev;
1879 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1880 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1881
1882 if (txq_size) {
1883 txqi = netdev_priv(ndev) + size;
1884 ieee80211_txq_init(sdata, NULL, txqi, 0);
1885 }
1886
1887 sdata->dev = ndev;
1888 }
1889
1890 /* initialise type-independent data */
1891 sdata->wdev.wiphy = local->hw.wiphy;
1892 sdata->local = local;
1893
1894 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1895 skb_queue_head_init(&sdata->fragments[i].skb_list);
1896
1897 INIT_LIST_HEAD(&sdata->key_list);
1898
1899 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1900 ieee80211_dfs_cac_timer_work);
1901 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1902 ieee80211_delayed_tailroom_dec);
1903
1904 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1905 struct ieee80211_supported_band *sband;
1906 sband = local->hw.wiphy->bands[i];
1907 sdata->rc_rateidx_mask[i] =
1908 sband ? (1 << sband->n_bitrates) - 1 : 0;
1909 if (sband) {
1910 __le16 cap;
1911 u16 *vht_rate_mask;
1912
1913 memcpy(sdata->rc_rateidx_mcs_mask[i],
1914 sband->ht_cap.mcs.rx_mask,
1915 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1916
1917 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1918 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1919 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1920 } else {
1921 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1922 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1923 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1924 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1925 }
1926 }
1927
1928 ieee80211_set_default_queues(sdata);
1929
1930 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1931 sdata->user_power_level = local->user_power_level;
1932
1933 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1934
1935 /* setup type-dependent data */
1936 ieee80211_setup_sdata(sdata, type);
1937
1938 if (ndev) {
1939 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1940 if (type == NL80211_IFTYPE_STATION)
1941 sdata->u.mgd.use_4addr = params->use_4addr;
1942
1943 ndev->features |= local->hw.netdev_features;
1944 ndev->hw_features |= ndev->features &
1945 MAC80211_SUPPORTED_FEATURES_TX;
1946
1947 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1948
1949 /* MTU range: 256 - 2304 */
1950 ndev->min_mtu = 256;
1951 ndev->max_mtu = local->hw.max_mtu;
1952
1953 ret = register_netdevice(ndev);
1954 if (ret) {
1955 free_netdev(ndev);
1956 return ret;
1957 }
1958 }
1959
1960 mutex_lock(&local->iflist_mtx);
1961 list_add_tail_rcu(&sdata->list, &local->interfaces);
1962 mutex_unlock(&local->iflist_mtx);
1963
1964 if (new_wdev)
1965 *new_wdev = &sdata->wdev;
1966
1967 return 0;
1968 }
1969
1970 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1971 {
1972 ASSERT_RTNL();
1973
1974 mutex_lock(&sdata->local->iflist_mtx);
1975 list_del_rcu(&sdata->list);
1976 mutex_unlock(&sdata->local->iflist_mtx);
1977
1978 if (sdata->vif.txq)
1979 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1980
1981 synchronize_rcu();
1982
1983 if (sdata->dev) {
1984 unregister_netdevice(sdata->dev);
1985 } else {
1986 cfg80211_unregister_wdev(&sdata->wdev);
1987 ieee80211_teardown_sdata(sdata);
1988 kfree(sdata);
1989 }
1990 }
1991
1992 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1993 {
1994 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1995 return;
1996 ieee80211_do_stop(sdata, true);
1997 }
1998
1999 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2000 {
2001 struct ieee80211_sub_if_data *sdata, *tmp;
2002 LIST_HEAD(unreg_list);
2003 LIST_HEAD(wdev_list);
2004
2005 ASSERT_RTNL();
2006
2007 /* Before destroying the interfaces, make sure they're all stopped so
2008 * that the hardware is stopped. Otherwise, the driver might still be
2009 * iterating the interfaces during the shutdown, e.g. from a worker
2010 * or from RX processing or similar, and if it does so (using atomic
2011 * iteration) while we're manipulating the list, the iteration will
2012 * crash.
2013 *
2014 * After this, the hardware should be stopped and the driver should
2015 * have stopped all of its activities, so that we can do RCU-unaware
2016 * manipulations of the interface list below.
2017 */
2018 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2019
2020 WARN(local->open_count, "%s: open count remains %d\n",
2021 wiphy_name(local->hw.wiphy), local->open_count);
2022
2023 ieee80211_txq_teardown_flows(local);
2024
2025 mutex_lock(&local->iflist_mtx);
2026 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2027 list_del(&sdata->list);
2028
2029 if (sdata->dev)
2030 unregister_netdevice_queue(sdata->dev, &unreg_list);
2031 else
2032 list_add(&sdata->list, &wdev_list);
2033 }
2034 mutex_unlock(&local->iflist_mtx);
2035 unregister_netdevice_many(&unreg_list);
2036
2037 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2038 list_del(&sdata->list);
2039 cfg80211_unregister_wdev(&sdata->wdev);
2040 kfree(sdata);
2041 }
2042 }
2043
2044 static int netdev_notify(struct notifier_block *nb,
2045 unsigned long state, void *ptr)
2046 {
2047 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2048 struct ieee80211_sub_if_data *sdata;
2049
2050 if (state != NETDEV_CHANGENAME)
2051 return NOTIFY_DONE;
2052
2053 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2054 return NOTIFY_DONE;
2055
2056 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2057 return NOTIFY_DONE;
2058
2059 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2060 memcpy(sdata->name, dev->name, IFNAMSIZ);
2061 ieee80211_debugfs_rename_netdev(sdata);
2062
2063 return NOTIFY_OK;
2064 }
2065
2066 static struct notifier_block mac80211_netdev_notifier = {
2067 .notifier_call = netdev_notify,
2068 };
2069
2070 int ieee80211_iface_init(void)
2071 {
2072 return register_netdevice_notifier(&mac80211_netdev_notifier);
2073 }
2074
2075 void ieee80211_iface_exit(void)
2076 {
2077 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2078 }
2079
2080 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2081 {
2082 if (sdata->vif.type == NL80211_IFTYPE_AP)
2083 atomic_inc(&sdata->u.ap.num_mcast_sta);
2084 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2085 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2086 }
2087
2088 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2089 {
2090 if (sdata->vif.type == NL80211_IFTYPE_AP)
2091 atomic_dec(&sdata->u.ap.num_mcast_sta);
2092 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2093 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2094 }
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