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UBUNTU: Ubuntu-5.15.0-39.42
[mirror_ubuntu-jammy-kernel.git] / net / mac80211 / iface.c
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d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
f0706e82 2/*
c5d54fbf 3 * Interface handling
0d143fe1 4 *
f0706e82
JB		 5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 9 * Copyright 2013-2014 Intel Mobile Communications GmbH
d2941df8 10 * Copyright (c) 2016 Intel Deutschland GmbH
3a11ce08 11 * Copyright (C) 2018-2021 Intel Corporation
f0706e82 12 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
183f47fc 18#include <linux/kcov.h>
f0706e82 19#include <net/mac80211.h>
cf0277e7 20#include <net/ieee80211_radiotap.h>
f0706e82
JB		 21#include "ieee80211_i.h"
22#include "sta_info.h"
e9f207f0 23#include "debugfs_netdev.h"
ee385855 24#include "mesh.h"
0d143fe1 25#include "led.h"
24487981 26#include "driver-ops.h"
cf0277e7 27#include "wme.h"
1be7fe8d 28#include "rate.h"
0d143fe1 29
c771c9d8
JB		 30/**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
38 * the iflist_mtx.
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
41 *
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
44 */
45
42bd20d9
AE		 46static void ieee80211_iface_work(struct work_struct *work);
47
1ea6f9c0
JB		 48bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
49{
50 struct ieee80211_chanctx_conf *chanctx_conf;
51 int power;
52
53 rcu_read_lock();
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
55 if (!chanctx_conf) {
56 rcu_read_unlock();
57 return false;
58 }
59
0430c883 60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 61 rcu_read_unlock();
62
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
65
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
68
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
72 return true;
73 }
74
75 return false;
76}
77
db82d8a9
LB		 78void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
79 bool update_bss)
1ea6f9c0 80{
5ad11b50
EG		 81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
84}
c771c9d8 85
62a40a15 86static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 87{
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
89 return 0;
90
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
93}
94
62a40a15 95static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 96{
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
98 return 0;
99
3b24f4c6 100 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 101
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
104}
105
62a40a15
JB		 106static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
107 bool force_active)
cc45ae54 108{
1d5e1266 109 bool working, scanning, active;
cc45ae54 110 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 111
cc45ae54
JB		 112 lockdep_assert_held(&local->mtx);
113
62a40a15
JB		 114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
116 local->monitors;
cc45ae54 117
1d5e1266
JB		 118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
cc45ae54 120
f1e3e051
JB		 121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 123
cc45ae54
JB		 124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128
fd0f979a 129 if (active)
cc45ae54
JB		 130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 else
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135
fd0f979a 136 if (working || scanning || active)
62a40a15
JB		 137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
139}
140
141u32 ieee80211_idle_off(struct ieee80211_local *local)
142{
143 return __ieee80211_recalc_idle(local, true);
144}
145
146void ieee80211_recalc_idle(struct ieee80211_local *local)
147{
148 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 149 if (change)
150 ieee80211_hw_config(local, change);
cc45ae54
JB		 151}
152
3899ba90 153static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 154 bool check_dup)
478622e8 155{
ac20976d
HS		 156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_sub_if_data *iter;
478622e8
HS		 158 u64 new, mask, tmp;
159 u8 *m;
160 int ret = 0;
161
162 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
163 return 0;
164
165 m = addr;
166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
169
170 m = local->hw.wiphy->addr_mask;
171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
174
31eba5bc
FF		 175 if (!check_dup)
176 return ret;
478622e8
HS		 177
178 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 179 list_for_each_entry(iter, &local->interfaces, list) {
180 if (iter == sdata)
478622e8
HS		 181 continue;
182
3899ba90 183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 185 continue;
186
ac20976d 187 m = iter->vif.addr;
478622e8
HS		 188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
191
192 if ((new & ~mask) != (tmp & ~mask)) {
193 ret = -EINVAL;
194 break;
195 }
196 }
197 mutex_unlock(&local->iflist_mtx);
198
199 return ret;
200}
201
47846c9b
JB		 202static int ieee80211_change_mac(struct net_device *dev, void *addr)
203{
204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 205 struct sockaddr *sa = addr;
31eba5bc 206 bool check_dup = true;
47846c9b
JB		 207 int ret;
208
9607e6b6 209 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 210 return -EBUSY;
211
31eba5bc 212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 214 check_dup = false;
215
3899ba90 216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 217 if (ret)
218 return ret;
219
fc5f7577 220 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 221
222 if (ret == 0)
fc5f7577 223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 224
225 return ret;
226}
227
0d143fe1
JB		 228static inline int identical_mac_addr_allowed(int type1, int type2)
229{
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
235 (type1 == NL80211_IFTYPE_AP_VLAN &&
236 (type2 == NL80211_IFTYPE_AP ||
237 type2 == NL80211_IFTYPE_AP_VLAN));
238}
239
87490f6d
JB		 240static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
241 enum nl80211_iftype iftype)
0d143fe1 242{
b4a4bf5d 243 struct ieee80211_local *local = sdata->local;
87490f6d 244 struct ieee80211_sub_if_data *nsdata;
b6a55015 245 int ret;
0d143fe1 246
87490f6d 247 ASSERT_RTNL();
0d143fe1
JB		 248
249 /* we hold the RTNL here so can safely walk the list */
250 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 251 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 252 /*
253 * Only OCB and monitor mode may coexist
254 */
255 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
256 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
257 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
258 nsdata->vif.type == NL80211_IFTYPE_OCB))
259 return -EBUSY;
260
0d143fe1
JB		 261 /*
262 * Allow only a single IBSS interface to be up at any
263 * time. This is restricted because beacon distribution
264 * cannot work properly if both are in the same IBSS.
265 *
266 * To remove this restriction we'd have to disallow them
267 * from setting the same SSID on different IBSS interfaces
268 * belonging to the same hardware. Then, however, we're
269 * faced with having to adopt two different TSF timers...
270 */
87490f6d 271 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 272 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
273 return -EBUSY;
73da7d5b
SW		 274 /*
275 * will not add another interface while any channel
276 * switch is active.
277 */
278 if (nsdata->vif.csa_active)
279 return -EBUSY;
0d143fe1
JB		 280
281 /*
282 * The remaining checks are only performed for interfaces
283 * with the same MAC address.
284 */
371a255e
JB		 285 if (!ether_addr_equal(sdata->vif.addr,
286 nsdata->vif.addr))
0d143fe1
JB		 287 continue;
288
289 /*
290 * check whether it may have the same address
291 */
87490f6d 292 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 293 nsdata->vif.type))
294 return -ENOTUNIQ;
295
296 /*
297 * can only add VLANs to enabled APs
298 */
87490f6d 299 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 300 nsdata->vif.type == NL80211_IFTYPE_AP)
301 sdata->bss = &nsdata->u.ap;
302 }
303 }
304
b6a55015
LC		 305 mutex_lock(&local->chanctx_mtx);
306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
307 mutex_unlock(&local->chanctx_mtx);
308 return ret;
87490f6d
JB		 309}
310
a9865538
JB		 311static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
3a25a8c8
JB		 313{
314 int n_queues = sdata->local->hw.queues;
315 int i;
316
708d50ed
AB		 317 if (iftype == NL80211_IFTYPE_NAN)
318 return 0;
319
a9865538 320 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 321 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
323 IEEE80211_INVAL_HW_QUEUE))
324 return -EINVAL;
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
326 n_queues))
327 return -EINVAL;
328 }
3a25a8c8
JB		 329 }
330
a9865538
JB		 331 if ((iftype != NL80211_IFTYPE_AP &&
332 iftype != NL80211_IFTYPE_P2P_GO &&
333 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 334 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 335 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
336 return 0;
337 }
338
339 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
340 return -EINVAL;
341
342 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
343 return -EINVAL;
344
345 return 0;
346}
347
4b7afb52 348static int ieee80211_open(struct net_device *dev)
6aea26ce 349{
4b7afb52
FF		 350 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
351 int err;
352
353 /* fail early if user set an invalid address */
354 if (!is_valid_ether_addr(dev->dev_addr))
355 return -EADDRNOTAVAIL;
356
357 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
358 if (err)
359 return err;
360
a05829a7
JB		 361 wiphy_lock(sdata->local->hw.wiphy);
362 err = ieee80211_do_open(&sdata->wdev, true);
363 wiphy_unlock(sdata->local->hw.wiphy);
364
365 return err;
6aea26ce
FF		 366}
367
a05829a7 368static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
6aea26ce
FF		 369{
370 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 371 unsigned long flags;
372 struct sk_buff *skb, *tmp;
373 u32 hw_reconf_flags = 0;
374 int i, flushed;
375 struct ps_data *ps;
376 struct cfg80211_chan_def chandef;
377 bool cancel_scan;
378 struct cfg80211_nan_func *func;
6aea26ce 379
4b7afb52 380 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
6aea26ce 381
4b7afb52
FF		 382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
383 if (cancel_scan)
384 ieee80211_scan_cancel(local);
6aea26ce 385
4b7afb52
FF		 386 /*
387 * Stop TX on this interface first.
388 */
389 if (sdata->dev)
390 netif_tx_stop_all_queues(sdata->dev);
6aea26ce 391
4b7afb52 392 ieee80211_roc_purge(local, sdata);
6aea26ce 393
4b7afb52
FF		 394 switch (sdata->vif.type) {
395 case NL80211_IFTYPE_STATION:
396 ieee80211_mgd_stop(sdata);
397 break;
398 case NL80211_IFTYPE_ADHOC:
399 ieee80211_ibss_stop(sdata);
400 break;
401 case NL80211_IFTYPE_MONITOR:
402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
403 break;
404 list_del_rcu(&sdata->u.mntr.list);
405 break;
406 default:
407 break;
408 }
6aea26ce 409
4b7afb52
FF		 410 /*
411 * Remove all stations associated with this interface.
412 *
413 * This must be done before calling ops->remove_interface()
414 * because otherwise we can later invoke ops->sta_notify()
415 * whenever the STAs are removed, and that invalidates driver
416 * assumptions about always getting a vif pointer that is valid
417 * (because if we remove a STA after ops->remove_interface()
418 * the driver will have removed the vif info already!)
419 *
70d9c599 420 * For AP_VLANs stations may exist since there's nothing else that
4b7afb52
FF		 421 * would have removed them, but in other modes there shouldn't
422 * be any stations.
423 */
424 flushed = sta_info_flush(sdata);
70d9c599 425 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
6aea26ce 426
4b7afb52
FF		 427 /* don't count this interface for allmulti while it is down */
428 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
429 atomic_dec(&local->iff_allmultis);
6aea26ce 430
4b7afb52
FF		 431 if (sdata->vif.type == NL80211_IFTYPE_AP) {
432 local->fif_pspoll--;
433 local->fif_probe_req--;
434 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
435 local->fif_probe_req--;
6aea26ce
FF		 436 }
437
4b7afb52
FF		 438 if (sdata->dev) {
439 netif_addr_lock_bh(sdata->dev);
440 spin_lock_bh(&local->filter_lock);
441 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
442 sdata->dev->addr_len);
443 spin_unlock_bh(&local->filter_lock);
444 netif_addr_unlock_bh(sdata->dev);
6aea26ce 445 }
6aea26ce 446
4b7afb52
FF		 447 del_timer_sync(&local->dynamic_ps_timer);
448 cancel_work_sync(&local->dynamic_ps_enable_work);
6aea26ce 449
4b7afb52
FF		 450 cancel_work_sync(&sdata->recalc_smps);
451 sdata_lock(sdata);
452 mutex_lock(&local->mtx);
453 sdata->vif.csa_active = false;
454 if (sdata->vif.type == NL80211_IFTYPE_STATION)
455 sdata->u.mgd.csa_waiting_bcn = false;
456 if (sdata->csa_block_tx) {
457 ieee80211_wake_vif_queues(local, sdata,
458 IEEE80211_QUEUE_STOP_REASON_CSA);
459 sdata->csa_block_tx = false;
6aea26ce 460 }
4b7afb52
FF		 461 mutex_unlock(&local->mtx);
462 sdata_unlock(sdata);
6aea26ce 463
4b7afb52 464 cancel_work_sync(&sdata->csa_finalize_work);
5f9404ab 465 cancel_work_sync(&sdata->color_change_finalize_work);
85416a4f 466
4b7afb52 467 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
85416a4f 468
4b7afb52
FF		 469 if (sdata->wdev.cac_started) {
470 chandef = sdata->vif.bss_conf.chandef;
471 WARN_ON(local->suspended);
472 mutex_lock(&local->mtx);
473 ieee80211_vif_release_channel(sdata);
474 mutex_unlock(&local->mtx);
475 cfg80211_cac_event(sdata->dev, &chandef,
476 NL80211_RADAR_CAC_ABORTED,
477 GFP_KERNEL);
478 }
85416a4f 479
4b7afb52 480 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4b7afb52
FF		 481 WARN_ON(!list_empty(&sdata->u.ap.vlans));
482 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
483 /* remove all packets in parent bc_buf pointing to this dev */
484 ps = &sdata->bss->ps;
3a25a8c8 485
4b7afb52
FF		 486 spin_lock_irqsave(&ps->bc_buf.lock, flags);
487 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
488 if (skb->dev == sdata->dev) {
489 __skb_unlink(skb, &ps->bc_buf);
490 local->total_ps_buffered--;
491 ieee80211_free_txskb(&local->hw, skb);
492 }
493 }
494 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
3a25a8c8 495 }
3a25a8c8 496
4b7afb52
FF		 497 if (going_down)
498 local->open_count--;
4b6f1dd6 499
4b7afb52
FF		 500 switch (sdata->vif.type) {
501 case NL80211_IFTYPE_AP_VLAN:
502 mutex_lock(&local->mtx);
503 list_del(&sdata->u.vlan.list);
504 mutex_unlock(&local->mtx);
505 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
506 /* see comment in the default case below */
507 ieee80211_free_keys(sdata, true);
508 /* no need to tell driver */
509 break;
510 case NL80211_IFTYPE_MONITOR:
511 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
512 local->cooked_mntrs--;
513 break;
514 }
685fb72b 515
4b7afb52
FF		 516 local->monitors--;
517 if (local->monitors == 0) {
518 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
519 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
520 }
4b6f1dd6 521
4b7afb52
FF		 522 ieee80211_adjust_monitor_flags(sdata, -1);
523 break;
524 case NL80211_IFTYPE_NAN:
525 /* clean all the functions */
526 spin_lock_bh(&sdata->u.nan.func_lock);
4b6f1dd6 527
4b7afb52
FF		 528 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
529 idr_remove(&sdata->u.nan.function_inst_ids, i);
530 cfg80211_free_nan_func(func);
531 }
532 idr_destroy(&sdata->u.nan.function_inst_ids);
3a25a8c8 533
4b7afb52
FF		 534 spin_unlock_bh(&sdata->u.nan.func_lock);
535 break;
536 case NL80211_IFTYPE_P2P_DEVICE:
537 /* relies on synchronize_rcu() below */
538 RCU_INIT_POINTER(local->p2p_sdata, NULL);
539 fallthrough;
540 default:
541 cancel_work_sync(&sdata->work);
542 /*
543 * When we get here, the interface is marked down.
544 * Free the remaining keys, if there are any
545 * (which can happen in AP mode if userspace sets
70d9c599 546 * keys before the interface is operating)
4b7afb52
FF		 547 *
548 * Force the key freeing to always synchronize_net()
549 * to wait for the RX path in case it is using this
550 * interface enqueuing frames at this very time on
551 * another CPU.
552 */
553 ieee80211_free_keys(sdata, true);
554 skb_queue_purge(&sdata->skb_queue);
f5a4c24e 555 skb_queue_purge(&sdata->status_queue);
4b6f1dd6
JB		 556 }
557
4b7afb52
FF		 558 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
559 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
560 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
561 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
562 if (info->control.vif == &sdata->vif) {
563 __skb_unlink(skb, &local->pending[i]);
564 ieee80211_free_txskb(&local->hw, skb);
565 }
566 }
3a25a8c8 567 }
4b7afb52 568 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
3a25a8c8 569
4b7afb52
FF		 570 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
571 ieee80211_txq_remove_vlan(local, sdata);
fab57a6c 572
4b7afb52
FF		 573 sdata->bss = NULL;
574
575 if (local->open_count == 0)
576 ieee80211_clear_tx_pending(local);
577
578 sdata->vif.bss_conf.beacon_int = 0;
579
580 /*
581 * If the interface goes down while suspended, presumably because
582 * the device was unplugged and that happens before our resume,
583 * then the driver is already unconfigured and the remainder of
584 * this function isn't needed.
585 * XXX: what about WoWLAN? If the device has software state, e.g.
586 * memory allocated, it might expect teardown commands from
587 * mac80211 here?
588 */
589 if (local->suspended) {
590 WARN_ON(local->wowlan);
32fed110 591 WARN_ON(rcu_access_pointer(local->monitor_sdata));
4b7afb52 592 return;
55de908a
JB		 593 }
594
4b7afb52
FF		 595 switch (sdata->vif.type) {
596 case NL80211_IFTYPE_AP_VLAN:
597 break;
598 case NL80211_IFTYPE_MONITOR:
599 if (local->monitors == 0)
600 ieee80211_del_virtual_monitor(local);
42bd20d9 601
4b7afb52
FF		 602 mutex_lock(&local->mtx);
603 ieee80211_recalc_idle(local);
604 mutex_unlock(&local->mtx);
4b6f1dd6 605
4b7afb52
FF		 606 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
607 break;
4b6f1dd6 608
4b7afb52
FF		 609 fallthrough;
610 default:
611 if (going_down)
612 drv_remove_interface(local, sdata);
613 }
4b6f1dd6 614
4b7afb52 615 ieee80211_recalc_ps(local);
8b305780 616
4b7afb52
FF		 617 if (cancel_scan)
618 flush_delayed_work(&local->scan_work);
4b6f1dd6 619
4b7afb52
FF		 620 if (local->open_count == 0) {
621 ieee80211_stop_device(local);
622
623 /* no reconfiguring after stop! */
8b305780
JB		 624 return;
625 }
4b6f1dd6 626
4b7afb52
FF		 627 /* do after stop to avoid reconfiguring when we stop anyway */
628 ieee80211_configure_filter(local);
629 ieee80211_hw_config(local, hw_reconf_flags);
8b305780 630
4b7afb52
FF		 631 if (local->monitors == local->open_count)
632 ieee80211_add_virtual_monitor(local);
633}
4b6f1dd6 634
4b7afb52
FF		 635static int ieee80211_stop(struct net_device *dev)
636{
637 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
55de908a 638
d5befb22
JB		 639 /* close all dependent VLAN interfaces before locking wiphy */
640 if (sdata->vif.type == NL80211_IFTYPE_AP) {
641 struct ieee80211_sub_if_data *vlan, *tmpsdata;
642
643 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
644 u.vlan.list)
645 dev_close(vlan->dev);
646 }
647
a05829a7 648 wiphy_lock(sdata->local->hw.wiphy);
4b7afb52 649 ieee80211_do_stop(sdata, true);
a05829a7 650 wiphy_unlock(sdata->local->hw.wiphy);
4b6f1dd6 651
4b7afb52 652 return 0;
4b6f1dd6
JB		 653}
654
4b7afb52 655static void ieee80211_set_multicast_list(struct net_device *dev)
87490f6d 656{
4b7afb52 657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
87490f6d 658 struct ieee80211_local *local = sdata->local;
4b7afb52 659 int allmulti, sdata_allmulti;
87490f6d 660
4b7afb52
FF		 661 allmulti = !!(dev->flags & IFF_ALLMULTI);
662 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
665c93a9 663
4b7afb52
FF		 664 if (allmulti != sdata_allmulti) {
665 if (dev->flags & IFF_ALLMULTI)
666 atomic_inc(&local->iff_allmultis);
667 else
668 atomic_dec(&local->iff_allmultis);
669 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
670 }
665c93a9 671
4b7afb52
FF		 672 spin_lock_bh(&local->filter_lock);
673 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
674 spin_unlock_bh(&local->filter_lock);
675 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
676}
665c93a9 677
4b7afb52
FF		 678/*
679 * Called when the netdev is removed or, by the code below, before
680 * the interface type changes.
681 */
682static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
683{
4b7afb52
FF		 684 /* free extra data */
685 ieee80211_free_keys(sdata, false);
f9dca80b 686
4b7afb52 687 ieee80211_debugfs_remove_netdev(sdata);
0d143fe1 688
3a11ce08 689 ieee80211_destroy_frag_cache(&sdata->frags);
0d143fe1 690
4b7afb52
FF		 691 if (ieee80211_vif_is_mesh(&sdata->vif))
692 ieee80211_mesh_teardown_sdata(sdata);
693}
0d143fe1 694
4b7afb52
FF		 695static void ieee80211_uninit(struct net_device *dev)
696{
697 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
698}
075e0847 699
4b7afb52
FF		 700static u16 ieee80211_netdev_select_queue(struct net_device *dev,
701 struct sk_buff *skb,
702 struct net_device *sb_dev)
703{
704 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
705}
0d143fe1 706
4b7afb52
FF		 707static void
708ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
709{
6401297e 710 dev_fetch_sw_netstats(stats, dev->tstats);
4b7afb52 711}
e3b90ca2 712
4b7afb52
FF		 713static const struct net_device_ops ieee80211_dataif_ops = {
714 .ndo_open = ieee80211_open,
715 .ndo_stop = ieee80211_stop,
716 .ndo_uninit = ieee80211_uninit,
717 .ndo_start_xmit = ieee80211_subif_start_xmit,
718 .ndo_set_rx_mode = ieee80211_set_multicast_list,
719 .ndo_set_mac_address = ieee80211_change_mac,
720 .ndo_select_queue = ieee80211_netdev_select_queue,
721 .ndo_get_stats64 = ieee80211_get_stats64,
722};
e3b90ca2 723
4b7afb52
FF		 724static u16 ieee80211_monitor_select_queue(struct net_device *dev,
725 struct sk_buff *skb,
726 struct net_device *sb_dev)
727{
728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
729 struct ieee80211_local *local = sdata->local;
730 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
731 struct ieee80211_hdr *hdr;
732 int len_rthdr;
90e8f58d 733
4b7afb52
FF		 734 if (local->hw.queues < IEEE80211_NUM_ACS)
735 return 0;
0d143fe1 736
4b7afb52
FF		 737 /* reset flags and info before parsing radiotap header */
738 memset(info, 0, sizeof(*info));
59034591 739
4b7afb52
FF		 740 if (!ieee80211_parse_tx_radiotap(skb, dev))
741 return 0; /* doesn't matter, frame will be dropped */
0d143fe1 742
4b7afb52
FF		 743 len_rthdr = ieee80211_get_radiotap_len(skb->data);
744 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
745 if (skb->len < len_rthdr + 2 ||
746 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
747 return 0; /* doesn't matter, frame will be dropped */
2d2080c3 748
4b7afb52
FF		 749 return ieee80211_select_queue_80211(sdata, skb, hdr);
750}
0d143fe1 751
4b7afb52
FF		 752static const struct net_device_ops ieee80211_monitorif_ops = {
753 .ndo_open = ieee80211_open,
754 .ndo_stop = ieee80211_stop,
755 .ndo_uninit = ieee80211_uninit,
756 .ndo_start_xmit = ieee80211_monitor_start_xmit,
757 .ndo_set_rx_mode = ieee80211_set_multicast_list,
758 .ndo_set_mac_address = ieee80211_change_mac,
759 .ndo_select_queue = ieee80211_monitor_select_queue,
760 .ndo_get_stats64 = ieee80211_get_stats64,
761};
0d143fe1 762
4b7afb52
FF		 763static const struct net_device_ops ieee80211_dataif_8023_ops = {
764 .ndo_open = ieee80211_open,
765 .ndo_stop = ieee80211_stop,
766 .ndo_uninit = ieee80211_uninit,
767 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
768 .ndo_set_rx_mode = ieee80211_set_multicast_list,
769 .ndo_set_mac_address = ieee80211_change_mac,
770 .ndo_select_queue = ieee80211_netdev_select_queue,
771 .ndo_get_stats64 = ieee80211_get_stats64,
772};
1be7fe8d 773
80a915ec 774static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
4b7afb52
FF		 775{
776 switch (iftype) {
777 /* P2P GO and client are mapped to AP/STATION types */
778 case NL80211_IFTYPE_AP:
779 case NL80211_IFTYPE_STATION:
780 return true;
f64331d5 781 default:
4b7afb52 782 return false;
0d143fe1 783 }
4b7afb52 784}
0d143fe1 785
4b7afb52
FF		 786static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
787{
788 struct ieee80211_local *local = sdata->local;
789 u32 flags;
965bedad 790
4b7afb52 791 flags = sdata->vif.offload_flags;
2b730daa 792
4b7afb52 793 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
80a915ec 794 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
4b7afb52 795 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 796
4b7afb52
FF		 797 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
798 local->hw.wiphy->frag_threshold != (u32)-1)
799 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 800
4b7afb52
FF		 801 if (local->monitors)
802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
803 } else {
804 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 805 }
0d143fe1 806
80a915ec
FF		 807 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
808 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
809 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
810
55f8205e
S		 811 if (local->monitors &&
812 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
80a915ec
FF		 813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
814 } else {
815 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
816 }
817
4b7afb52
FF		 818 if (sdata->vif.offload_flags == flags)
819 return false;
820
821 sdata->vif.offload_flags = flags;
80a915ec 822 ieee80211_check_fast_rx_iface(sdata);
4b7afb52 823 return true;
0d143fe1
JB		 824}
825
4b7afb52 826static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
0d143fe1 827{
4b7afb52
FF		 828 struct ieee80211_local *local = sdata->local;
829 struct ieee80211_sub_if_data *bss = sdata;
830 bool enabled;
34d4bc4d 831
4b7afb52
FF		 832 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
833 if (!sdata->bss)
834 return;
34d4bc4d 835
4b7afb52
FF		 836 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
837 }
34d4bc4d 838
4b7afb52 839 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
80a915ec 840 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
4b7afb52 841 return;
34d4bc4d 842
4b7afb52
FF		 843 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
844 if (sdata->wdev.use_4addr &&
845 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
846 enabled = false;
0d143fe1 847
4b7afb52
FF		 848 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
849 &ieee80211_dataif_ops;
850}
c29acf20 851
4b7afb52
FF		 852static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
853{
854 struct ieee80211_local *local = sdata->local;
855 struct ieee80211_sub_if_data *vsdata;
352ffad6 856
4b7afb52
FF		 857 if (ieee80211_set_sdata_offload_flags(sdata)) {
858 drv_update_vif_offload(local, sdata);
859 ieee80211_set_vif_encap_ops(sdata);
860 }
0d143fe1 861
4b7afb52
FF		 862 list_for_each_entry(vsdata, &local->interfaces, list) {
863 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
864 vsdata->bss != &sdata->u.ap)
865 continue;
af6b6374 866
4b7afb52 867 ieee80211_set_vif_encap_ops(vsdata);
8ffcc704 868 }
4b7afb52 869}
cd7760e6 870
4b7afb52
FF		 871void ieee80211_recalc_offload(struct ieee80211_local *local)
872{
873 struct ieee80211_sub_if_data *sdata;
0d143fe1 874
4b7afb52
FF		 875 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
876 return;
0d143fe1 877
4b7afb52 878 mutex_lock(&local->iflist_mtx);
e3b90ca2 879
4b7afb52
FF		 880 list_for_each_entry(sdata, &local->interfaces, list) {
881 if (!ieee80211_sdata_running(sdata))
882 continue;
883
884 ieee80211_recalc_sdata_offload(sdata);
f142c6b9 885 }
3ac64bee 886
4b7afb52
FF		 887 mutex_unlock(&local->iflist_mtx);
888}
0d143fe1 889
4b7afb52
FF		 890void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
891 const int offset)
892{
893 struct ieee80211_local *local = sdata->local;
894 u32 flags = sdata->u.mntr.flags;
59af6928 895
4b7afb52
FF		 896#define ADJUST(_f, _s) do { \
897 if (flags & MONITOR_FLAG_##_f) \
898 local->fif_##_s += offset; \
899 } while (0)
04ecd257 900
4b7afb52
FF		 901 ADJUST(FCSFAIL, fcsfail);
902 ADJUST(PLCPFAIL, plcpfail);
903 ADJUST(CONTROL, control);
904 ADJUST(CONTROL, pspoll);
905 ADJUST(OTHER_BSS, other_bss);
164eb02d 906
4b7afb52
FF		 907#undef ADJUST
908}
909
910static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
911{
912 struct ieee80211_local *local = sdata->local;
913 int i;
914
915 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
916 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
917 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
918 else if (local->hw.queues >= IEEE80211_NUM_ACS)
919 sdata->vif.hw_queue[i] = i;
920 else
921 sdata->vif.hw_queue[i] = 0;
164eb02d 922 }
4b7afb52
FF		 923 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
924}
164eb02d 925
4b7afb52
FF		 926int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
927{
928 struct ieee80211_sub_if_data *sdata;
929 int ret;
0d143fe1 930
4b7afb52
FF		 931 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
932 return 0;
397a7a24 933
4b7afb52 934 ASSERT_RTNL();
32fed110 935 lockdep_assert_wiphy(local->hw.wiphy);
0d143fe1 936
4b7afb52
FF		 937 if (local->monitor_sdata)
938 return 0;
0d143fe1 939
4b7afb52
FF		 940 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
941 if (!sdata)
942 return -ENOMEM;
0d143fe1 943
4b7afb52
FF		 944 /* set up data */
945 sdata->local = local;
946 sdata->vif.type = NL80211_IFTYPE_MONITOR;
947 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
948 wiphy_name(local->hw.wiphy));
949 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
0d143fe1 950
4b7afb52 951 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
167e33f4 952
4b7afb52 953 ieee80211_set_default_queues(sdata);
167e33f4 954
4b7afb52
FF		 955 ret = drv_add_interface(local, sdata);
956 if (WARN_ON(ret)) {
957 /* ok .. stupid driver, it asked for this! */
958 kfree(sdata);
959 return ret;
960 }
961
bdeca45a
BA		 962 set_bit(SDATA_STATE_RUNNING, &sdata->state);
963
4b7afb52
FF		 964 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
965 if (ret) {
966 kfree(sdata);
967 return ret;
0d143fe1
JB		 968 }
969
4b7afb52
FF		 970 mutex_lock(&local->iflist_mtx);
971 rcu_assign_pointer(local->monitor_sdata, sdata);
972 mutex_unlock(&local->iflist_mtx);
973
974 mutex_lock(&local->mtx);
975 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
976 IEEE80211_CHANCTX_EXCLUSIVE);
977 mutex_unlock(&local->mtx);
978 if (ret) {
979 mutex_lock(&local->iflist_mtx);
980 RCU_INIT_POINTER(local->monitor_sdata, NULL);
981 mutex_unlock(&local->iflist_mtx);
982 synchronize_net();
983 drv_remove_interface(local, sdata);
984 kfree(sdata);
985 return ret;
5061b0c2 986 }
075e0847 987
4b7afb52 988 skb_queue_head_init(&sdata->skb_queue);
f5a4c24e 989 skb_queue_head_init(&sdata->status_queue);
4b7afb52 990 INIT_WORK(&sdata->work, ieee80211_iface_work);
53168215 991
4b7afb52
FF		 992 return 0;
993}
ba8c3d6f 994
4b7afb52
FF		 995void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
996{
997 struct ieee80211_sub_if_data *sdata;
b2c0958b 998
4b7afb52
FF		 999 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1000 return;
5c21e810 1001
4b7afb52 1002 ASSERT_RTNL();
32fed110 1003 lockdep_assert_wiphy(local->hw.wiphy);
4b7afb52
FF		 1004
1005 mutex_lock(&local->iflist_mtx);
1006
1007 sdata = rcu_dereference_protected(local->monitor_sdata,
1008 lockdep_is_held(&local->iflist_mtx));
1009 if (!sdata) {
1010 mutex_unlock(&local->iflist_mtx);
b2c0958b
JB		 1011 return;
1012 }
1013
4b7afb52
FF		 1014 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1015 mutex_unlock(&local->iflist_mtx);
1016
1017 synchronize_net();
1018
1019 mutex_lock(&local->mtx);
1020 ieee80211_vif_release_channel(sdata);
1021 mutex_unlock(&local->mtx);
1022
1023 drv_remove_interface(local, sdata);
1024
1025 kfree(sdata);
1026}
1027
1028/*
1029 * NOTE: Be very careful when changing this function, it must NOT return
1030 * an error on interface type changes that have been pre-checked, so most
1031 * checks should be in ieee80211_check_concurrent_iface.
1032 */
1033int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1034{
1035 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1036 struct net_device *dev = wdev->netdev;
1037 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 1038 u32 changed = 0;
1039 int res;
1040 u32 hw_reconf_flags = 0;
1041
b2c0958b 1042 switch (sdata->vif.type) {
4b7afb52
FF		 1043 case NL80211_IFTYPE_AP_VLAN: {
1044 struct ieee80211_sub_if_data *master;
1045
1046 if (!sdata->bss)
1047 return -ENOLINK;
b2c0958b
JB		 1048
1049 mutex_lock(&local->mtx);
4b7afb52 1050 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
b2c0958b 1051 mutex_unlock(&local->mtx);
31eba5bc 1052
4b7afb52
FF		 1053 master = container_of(sdata->bss,
1054 struct ieee80211_sub_if_data, u.ap);
1055 sdata->control_port_protocol =
1056 master->control_port_protocol;
1057 sdata->control_port_no_encrypt =
1058 master->control_port_no_encrypt;
1059 sdata->control_port_over_nl80211 =
1060 master->control_port_over_nl80211;
1061 sdata->control_port_no_preauth =
1062 master->control_port_no_preauth;
1063 sdata->vif.cab_queue = master->vif.cab_queue;
1064 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1065 sizeof(sdata->vif.hw_queue));
1066 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
b2c0958b 1067
4b7afb52
FF		 1068 mutex_lock(&local->key_mtx);
1069 sdata->crypto_tx_tailroom_needed_cnt +=
1070 master->crypto_tx_tailroom_needed_cnt;
1071 mutex_unlock(&local->key_mtx);
b2c0958b 1072
4b7afb52
FF		 1073 break;
1074 }
1075 case NL80211_IFTYPE_AP:
1076 sdata->bss = &sdata->u.ap;
1077 break;
1078 case NL80211_IFTYPE_MESH_POINT:
1079 case NL80211_IFTYPE_STATION:
1080 case NL80211_IFTYPE_MONITOR:
1081 case NL80211_IFTYPE_ADHOC:
1082 case NL80211_IFTYPE_P2P_DEVICE:
1083 case NL80211_IFTYPE_OCB:
1084 case NL80211_IFTYPE_NAN:
1085 /* no special treatment */
1086 break;
1087 case NL80211_IFTYPE_UNSPECIFIED:
1088 case NUM_NL80211_IFTYPES:
1089 case NL80211_IFTYPE_P2P_CLIENT:
1090 case NL80211_IFTYPE_P2P_GO:
70d9c599 1091 case NL80211_IFTYPE_WDS:
4b7afb52
FF		 1092 /* cannot happen */
1093 WARN_ON(1);
1094 break;
1095 }
46238845 1096
b2c0958b 1097 if (local->open_count == 0) {
4b7afb52
FF		 1098 res = drv_start(local);
1099 if (res)
1100 goto err_del_bss;
1101 /* we're brought up, everything changes */
1102 hw_reconf_flags = ~0;
1103 ieee80211_led_radio(local, true);
1104 ieee80211_mod_tpt_led_trig(local,
1105 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
b2c0958b
JB		 1106 }
1107
4b7afb52
FF		 1108 /*
1109 * Copy the hopefully now-present MAC address to
1110 * this interface, if it has the special null one.
1111 */
1112 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1113 memcpy(dev->dev_addr,
1114 local->hw.wiphy->perm_addr,
1115 ETH_ALEN);
1116 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
34d4bc4d 1117
4b7afb52
FF		 1118 if (!is_valid_ether_addr(dev->dev_addr)) {
1119 res = -EADDRNOTAVAIL;
1120 goto err_stop;
1121 }
1122 }
34d4bc4d 1123
4b7afb52
FF		 1124 switch (sdata->vif.type) {
1125 case NL80211_IFTYPE_AP_VLAN:
1126 /* no need to tell driver, but set carrier and chanctx */
1127 if (rtnl_dereference(sdata->bss->beacon)) {
1128 ieee80211_vif_vlan_copy_chanctx(sdata);
1129 netif_carrier_on(dev);
1130 ieee80211_set_vif_encap_ops(sdata);
1131 } else {
1132 netif_carrier_off(dev);
1133 }
1134 break;
1135 case NL80211_IFTYPE_MONITOR:
1136 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1137 local->cooked_mntrs++;
1138 break;
1139 }
5061b0c2 1140
4b7afb52
FF		 1141 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1142 res = drv_add_interface(local, sdata);
1143 if (res)
1144 goto err_stop;
1145 } else if (local->monitors == 0 && local->open_count == 0) {
1146 res = ieee80211_add_virtual_monitor(local);
1147 if (res)
1148 goto err_stop;
1149 }
0d143fe1 1150
4b7afb52
FF		 1151 /* must be before the call to ieee80211_configure_filter */
1152 local->monitors++;
1153 if (local->monitors == 1) {
1154 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1155 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1156 }
0d143fe1 1157
4b7afb52
FF		 1158 ieee80211_adjust_monitor_flags(sdata, 1);
1159 ieee80211_configure_filter(local);
1160 ieee80211_recalc_offload(local);
1161 mutex_lock(&local->mtx);
1162 ieee80211_recalc_idle(local);
1163 mutex_unlock(&local->mtx);
0d143fe1 1164
4b7afb52
FF		 1165 netif_carrier_on(dev);
1166 break;
1167 default:
1168 if (coming_up) {
1169 ieee80211_del_virtual_monitor(local);
1170 ieee80211_set_sdata_offload_flags(sdata);
0d143fe1 1171
4b7afb52
FF		 1172 res = drv_add_interface(local, sdata);
1173 if (res)
1174 goto err_stop;
0d143fe1 1175
4b7afb52
FF		 1176 ieee80211_set_vif_encap_ops(sdata);
1177 res = ieee80211_check_queues(sdata,
1178 ieee80211_vif_type_p2p(&sdata->vif));
1179 if (res)
1180 goto err_del_interface;
1181 }
f0706e82 1182
4b7afb52
FF		 1183 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1184 local->fif_pspoll++;
1185 local->fif_probe_req++;
75636525 1186
4b7afb52
FF		 1187 ieee80211_configure_filter(local);
1188 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1189 local->fif_probe_req++;
1190 }
aee14ceb 1191
4b7afb52
FF		 1192 if (sdata->vif.probe_req_reg)
1193 drv_config_iface_filter(local, sdata,
1194 FIF_PROBE_REQ,
1195 FIF_PROBE_REQ);
11a843b7 1196
4b7afb52
FF		 1197 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1198 sdata->vif.type != NL80211_IFTYPE_NAN)
1199 changed |= ieee80211_reset_erp_info(sdata);
1200 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 1201
4b7afb52
FF		 1202 switch (sdata->vif.type) {
1203 case NL80211_IFTYPE_STATION:
1204 case NL80211_IFTYPE_ADHOC:
1205 case NL80211_IFTYPE_AP:
1206 case NL80211_IFTYPE_MESH_POINT:
1207 case NL80211_IFTYPE_OCB:
1208 netif_carrier_off(dev);
1209 break;
4b7afb52
FF		 1210 case NL80211_IFTYPE_P2P_DEVICE:
1211 case NL80211_IFTYPE_NAN:
1212 break;
1213 default:
1214 /* not reached */
1215 WARN_ON(1);
1216 }
f142c6b9 1217
4b7afb52
FF		 1218 /*
1219 * Set default queue parameters so drivers don't
1220 * need to initialise the hardware if the hardware
1221 * doesn't start up with sane defaults.
1222 * Enable QoS for anything but station interfaces.
1223 */
1224 ieee80211_set_wmm_default(sdata, true,
1225 sdata->vif.type != NL80211_IFTYPE_STATION);
1226 }
cf0277e7 1227
4b7afb52 1228 set_bit(SDATA_STATE_RUNNING, &sdata->state);
5a490510 1229
4b7afb52 1230 switch (sdata->vif.type) {
4b7afb52
FF		 1231 case NL80211_IFTYPE_P2P_DEVICE:
1232 rcu_assign_pointer(local->p2p_sdata, sdata);
1233 break;
1234 case NL80211_IFTYPE_MONITOR:
1235 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1236 break;
1237 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1238 break;
1239 default:
1240 break;
5a490510 1241 }
5a490510 1242
4b7afb52
FF		 1243 /*
1244 * set_multicast_list will be invoked by the networking core
1245 * which will check whether any increments here were done in
1246 * error and sync them down to the hardware as filter flags.
1247 */
1248 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1249 atomic_inc(&local->iff_allmultis);
587e729e 1250
4b7afb52
FF		 1251 if (coming_up)
1252 local->open_count++;
cf0277e7 1253
4b7afb52
FF		 1254 if (hw_reconf_flags)
1255 ieee80211_hw_config(local, hw_reconf_flags);
cf0277e7 1256
4b7afb52 1257 ieee80211_recalc_ps(local);
cb17ed29 1258
4b7afb52
FF		 1259 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1260 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1261 local->ops->wake_tx_queue) {
1262 /* XXX: for AP_VLAN, actually track AP queues */
1263 if (dev)
1264 netif_tx_start_all_queues(dev);
1265 } else if (dev) {
1266 unsigned long flags;
1267 int n_acs = IEEE80211_NUM_ACS;
1268 int ac;
cf0277e7 1269
4b7afb52
FF		 1270 if (local->hw.queues < IEEE80211_NUM_ACS)
1271 n_acs = 1;
cf0277e7 1272
4b7afb52
FF		 1273 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1274 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1275 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1276 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1277 for (ac = 0; ac < n_acs; ac++) {
1278 int ac_queue = sdata->vif.hw_queue[ac];
cf0277e7 1279
4b7afb52
FF		 1280 if (local->queue_stop_reasons[ac_queue] == 0 &&
1281 skb_queue_empty(&local->pending[ac_queue]))
1282 netif_start_subqueue(dev, ac);
1283 }
1284 }
1285 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1286 }
587e729e 1287
4b7afb52
FF		 1288 return 0;
1289 err_del_interface:
1290 drv_remove_interface(local, sdata);
1291 err_stop:
1292 if (!local->open_count)
1293 drv_stop(local);
1294 err_del_bss:
1295 sdata->bss = NULL;
1296 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1297 mutex_lock(&local->mtx);
1298 list_del(&sdata->u.vlan.list);
1299 mutex_unlock(&local->mtx);
1300 }
1301 /* might already be clear but that doesn't matter */
1302 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1303 return res;
1304}
50ff477a 1305
5a490510
JB		 1306static void ieee80211_if_free(struct net_device *dev)
1307{
1308 free_percpu(dev->tstats);
5a490510
JB		 1309}
1310
587e729e
JB		 1311static void ieee80211_if_setup(struct net_device *dev)
1312{
1313 ether_setup(dev);
550fd08c 1314 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1315 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1316 dev->needs_free_netdev = true;
1317 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1318}
1319
80a83cfc
MK		 1320static void ieee80211_if_setup_no_queue(struct net_device *dev)
1321{
1322 ieee80211_if_setup(dev);
1323 dev->priv_flags |= IFF_NO_QUEUE;
1324}
1325
07bd1c79
JB		 1326static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1327 struct ieee80211_sub_if_data *sdata,
1328 struct sk_buff *skb)
1329{
1330 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1331
1332 if (ieee80211_is_action(mgmt->frame_control) &&
1333 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1334 struct sta_info *sta;
1335 int len = skb->len;
1336
1337 mutex_lock(&local->sta_mtx);
1338 sta = sta_info_get_bss(sdata, mgmt->sa);
1339 if (sta) {
1340 switch (mgmt->u.action.u.addba_req.action_code) {
1341 case WLAN_ACTION_ADDBA_REQ:
1342 ieee80211_process_addba_request(local, sta,
1343 mgmt, len);
1344 break;
1345 case WLAN_ACTION_ADDBA_RESP:
1346 ieee80211_process_addba_resp(local, sta,
1347 mgmt, len);
1348 break;
1349 case WLAN_ACTION_DELBA:
1350 ieee80211_process_delba(sdata, sta,
1351 mgmt, len);
1352 break;
1353 default:
1354 WARN_ON(1);
1355 break;
1356 }
1357 }
1358 mutex_unlock(&local->sta_mtx);
1359 } else if (ieee80211_is_action(mgmt->frame_control) &&
1360 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1361 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1362 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1363 struct ieee80211_rx_status *status;
1364 enum nl80211_band band;
1365 struct sta_info *sta;
1366 u8 opmode;
1367
1368 status = IEEE80211_SKB_RXCB(skb);
1369 band = status->band;
1370 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1371
1372 mutex_lock(&local->sta_mtx);
1373 sta = sta_info_get_bss(sdata, mgmt->sa);
1374
1375 if (sta)
1376 ieee80211_vht_handle_opmode(sdata, sta, opmode,
1377 band);
1378
1379 mutex_unlock(&local->sta_mtx);
1380 break;
1381 }
1382 case WLAN_VHT_ACTION_GROUPID_MGMT:
1383 ieee80211_process_mu_groups(sdata, mgmt);
1384 break;
1385 default:
1386 WARN_ON(1);
1387 break;
1388 }
f5a4c24e
LB		 1389 } else if (ieee80211_is_action(mgmt->frame_control) &&
1390 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1391 switch (mgmt->u.action.u.s1g.action_code) {
1392 case WLAN_S1G_TWT_TEARDOWN:
1393 case WLAN_S1G_TWT_SETUP:
1394 ieee80211_s1g_rx_twt_action(sdata, skb);
1395 break;
1396 default:
1397 break;
1398 }
07bd1c79
JB		 1399 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1400 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1401 ieee80211_sta_rx_queued_ext(sdata, skb);
1402 else
1403 WARN_ON(1);
1404 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1405 struct ieee80211_hdr *hdr = (void *)mgmt;
1406 struct sta_info *sta;
1407
1408 /*
1409 * So the frame isn't mgmt, but frame_control
1410 * is at the right place anyway, of course, so
1411 * the if statement is correct.
1412 *
1413 * Warn if we have other data frame types here,
1414 * they must not get here.
1415 */
1416 WARN_ON(hdr->frame_control &
1417 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1418 WARN_ON(!(hdr->seq_ctrl &
1419 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1420 /*
1421 * This was a fragment of a frame, received while
1422 * a block-ack session was active. That cannot be
1423 * right, so terminate the session.
1424 */
1425 mutex_lock(&local->sta_mtx);
1426 sta = sta_info_get_bss(sdata, mgmt->sa);
1427 if (sta) {
1428 u16 tid = ieee80211_get_tid(hdr);
1429
1430 __ieee80211_stop_rx_ba_session(
1431 sta, tid, WLAN_BACK_RECIPIENT,
1432 WLAN_REASON_QSTA_REQUIRE_SETUP,
1433 true);
1434 }
1435 mutex_unlock(&local->sta_mtx);
1436 } else switch (sdata->vif.type) {
1437 case NL80211_IFTYPE_STATION:
1438 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1439 break;
1440 case NL80211_IFTYPE_ADHOC:
1441 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1442 break;
1443 case NL80211_IFTYPE_MESH_POINT:
1444 if (!ieee80211_vif_is_mesh(&sdata->vif))
1445 break;
1446 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1447 break;
1448 default:
1449 WARN(1, "frame for unexpected interface type");
1450 break;
1451 }
1452}
1453
f5a4c24e
LB		 1454static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1455 struct sk_buff *skb)
1456{
1457 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1458
1459 if (ieee80211_is_action(mgmt->frame_control) &&
1460 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1461 switch (mgmt->u.action.u.s1g.action_code) {
1462 case WLAN_S1G_TWT_TEARDOWN:
1463 case WLAN_S1G_TWT_SETUP:
1464 ieee80211_s1g_status_twt_action(sdata, skb);
1465 break;
1466 default:
1467 break;
1468 }
1469 }
1470}
1471
1fa57d01
JB		 1472static void ieee80211_iface_work(struct work_struct *work)
1473{
1474 struct ieee80211_sub_if_data *sdata =
1475 container_of(work, struct ieee80211_sub_if_data, work);
1476 struct ieee80211_local *local = sdata->local;
1477 struct sk_buff *skb;
1478
1479 if (!ieee80211_sdata_running(sdata))
1480 return;
1481
fc58c47e 1482 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1483 return;
1484
4afaff17 1485 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1486 return;
1487
1488 /* first process frames */
1489 while ((skb = skb_dequeue(&sdata->skb_queue))) {
261e411b 1490 kcov_remote_start_common(skb_get_kcov_handle(skb));
bed7ee6e 1491
f057d140
JB		 1492 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1493 ieee80211_process_tdls_channel_switch(sdata, skb);
1494 else
1495 ieee80211_iface_process_skb(local, sdata, skb);
36b3a628
JB		 1496
1497 kfree_skb(skb);
261e411b 1498 kcov_remote_stop();
1fa57d01
JB		 1499 }
1500
f5a4c24e
LB		 1501 /* process status queue */
1502 while ((skb = skb_dequeue(&sdata->status_queue))) {
1503 kcov_remote_start_common(skb_get_kcov_handle(skb));
1504
1505 ieee80211_iface_process_status(sdata, skb);
1506 kfree_skb(skb);
1507
1508 kcov_remote_stop();
1509 }
1510
1fa57d01
JB		 1511 /* then other type-dependent work */
1512 switch (sdata->vif.type) {
1513 case NL80211_IFTYPE_STATION:
1514 ieee80211_sta_work(sdata);
1515 break;
1516 case NL80211_IFTYPE_ADHOC:
1517 ieee80211_ibss_work(sdata);
1518 break;
1519 case NL80211_IFTYPE_MESH_POINT:
1520 if (!ieee80211_vif_is_mesh(&sdata->vif))
1521 break;
1522 ieee80211_mesh_work(sdata);
1523 break;
239281f8
RL		 1524 case NL80211_IFTYPE_OCB:
1525 ieee80211_ocb_work(sdata);
1526 break;
1fa57d01
JB		 1527 default:
1528 break;
1529 }
1530}
1531
04ecd257
JB		 1532static void ieee80211_recalc_smps_work(struct work_struct *work)
1533{
1534 struct ieee80211_sub_if_data *sdata =
1535 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1536
1537 ieee80211_recalc_smps(sdata);
1538}
1fa57d01 1539
75636525
JB		 1540/*
1541 * Helper function to initialise an interface to a specific type.
1542 */
1543static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1544 enum nl80211_iftype type)
f0706e82 1545{
239281f8
RL		 1546 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1547 0xff, 0xff, 0xff};
1548
75636525
JB		 1549 /* clear type-dependent union */
1550 memset(&sdata->u, 0, sizeof(sdata->u));
1551
1552 /* and set some type-dependent values */
1553 sdata->vif.type = type;
2ca27bcf 1554 sdata->vif.p2p = false;
60719ffd 1555 sdata->wdev.iftype = type;
75636525 1556
a621fa4d
JB		 1557 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1558 sdata->control_port_no_encrypt = false;
7f3f96ce
MT		 1559 sdata->control_port_over_nl80211 = false;
1560 sdata->control_port_no_preauth = false;
2475b1cc 1561 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1562 sdata->vif.bss_conf.idle = true;
db6d9e9e 1563 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
a621fa4d 1564
b53be792
SW		 1565 sdata->noack_map = 0;
1566
f142c6b9
JB		 1567 /* only monitor/p2p-device differ */
1568 if (sdata->dev) {
1569 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1570 sdata->dev->type = ARPHRD_ETHER;
1571 }
75636525 1572
35f20c14 1573 skb_queue_head_init(&sdata->skb_queue);
f5a4c24e 1574 skb_queue_head_init(&sdata->status_queue);
1fa57d01 1575 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1576 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1577 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
5f9404ab 1578 INIT_WORK(&sdata->color_change_finalize_work, ieee80211_color_change_finalize_work);
484298ad 1579 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1580 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1581
75636525 1582 switch (type) {
2ca27bcf
JB		 1583 case NL80211_IFTYPE_P2P_GO:
1584 type = NL80211_IFTYPE_AP;
1585 sdata->vif.type = type;
1586 sdata->vif.p2p = true;
fc0561dc 1587 fallthrough;
05c914fe 1588 case NL80211_IFTYPE_AP:
d012a605 1589 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1590 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1591 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1592 break;
2ca27bcf
JB		 1593 case NL80211_IFTYPE_P2P_CLIENT:
1594 type = NL80211_IFTYPE_STATION;
1595 sdata->vif.type = type;
1596 sdata->vif.p2p = true;
fc0561dc 1597 fallthrough;
05c914fe 1598 case NL80211_IFTYPE_STATION:
ad2d223a 1599 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1600 ieee80211_sta_setup_sdata(sdata);
472dbc45 1601 break;
6e0bd6c3 1602 case NL80211_IFTYPE_OCB:
239281f8
RL		 1603 sdata->vif.bss_conf.bssid = bssid_wildcard;
1604 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1605 break;
46900298 1606 case NL80211_IFTYPE_ADHOC:
ad2d223a 1607 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1608 ieee80211_ibss_setup_sdata(sdata);
1609 break;
05c914fe 1610 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1611 if (ieee80211_vif_is_mesh(&sdata->vif))
1612 ieee80211_mesh_init_sdata(sdata);
1613 break;
05c914fe 1614 case NL80211_IFTYPE_MONITOR:
75636525 1615 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1616 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1617 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1618 MONITOR_FLAG_OTHER_BSS;
1619 break;
167e33f4
AB		 1620 case NL80211_IFTYPE_NAN:
1621 idr_init(&sdata->u.nan.function_inst_ids);
1622 spin_lock_init(&sdata->u.nan.func_lock);
1623 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1624 break;
05c914fe 1625 case NL80211_IFTYPE_AP_VLAN:
98104fde 1626 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1627 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1628 break;
05c914fe 1629 case NL80211_IFTYPE_UNSPECIFIED:
70d9c599 1630 case NL80211_IFTYPE_WDS:
2e161f78 1631 case NUM_NL80211_IFTYPES:
c7976f52 1632 WARN_ON(1);
75636525
JB		 1633 break;
1634 }
1635
1636 ieee80211_debugfs_add_netdev(sdata);
1637}
1638
34d4bc4d
JB		 1639static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1640 enum nl80211_iftype type)
1641{
1642 struct ieee80211_local *local = sdata->local;
1643 int ret, err;
2ca27bcf
JB		 1644 enum nl80211_iftype internal_type = type;
1645 bool p2p = false;
34d4bc4d
JB		 1646
1647 ASSERT_RTNL();
1648
1649 if (!local->ops->change_interface)
1650 return -EBUSY;
1651
1652 switch (sdata->vif.type) {
1653 case NL80211_IFTYPE_AP:
d5befb22
JB		 1654 if (!list_empty(&sdata->u.ap.vlans))
1655 return -EBUSY;
1656 break;
34d4bc4d
JB		 1657 case NL80211_IFTYPE_STATION:
1658 case NL80211_IFTYPE_ADHOC:
239281f8 1659 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1660 /*
1661 * Could maybe also all others here?
1662 * Just not sure how that interacts
1663 * with the RX/config path e.g. for
1664 * mesh.
1665 */
1666 break;
1667 default:
1668 return -EBUSY;
1669 }
1670
1671 switch (type) {
1672 case NL80211_IFTYPE_AP:
1673 case NL80211_IFTYPE_STATION:
1674 case NL80211_IFTYPE_ADHOC:
239281f8 1675 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1676 /*
1677 * Could probably support everything
70d9c599 1678 * but here.
34d4bc4d
JB		 1679 */
1680 break;
2ca27bcf
JB		 1681 case NL80211_IFTYPE_P2P_CLIENT:
1682 p2p = true;
1683 internal_type = NL80211_IFTYPE_STATION;
1684 break;
1685 case NL80211_IFTYPE_P2P_GO:
1686 p2p = true;
1687 internal_type = NL80211_IFTYPE_AP;
1688 break;
34d4bc4d
JB		 1689 default:
1690 return -EBUSY;
1691 }
1692
2ca27bcf 1693 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1694 if (ret)
1695 return ret;
1696
054c9939
JB		 1697 ieee80211_stop_vif_queues(local, sdata,
1698 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1699 synchronize_net();
1700
34d4bc4d
JB		 1701 ieee80211_do_stop(sdata, false);
1702
f142c6b9 1703 ieee80211_teardown_sdata(sdata);
34d4bc4d 1704
6aea26ce 1705 ieee80211_set_sdata_offload_flags(sdata);
2ca27bcf 1706 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1707 if (ret)
a9865538 1708 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1709
3a25a8c8
JB		 1710 /*
1711 * Ignore return value here, there's not much we can do since
1712 * the driver changed the interface type internally already.
1713 * The warnings will hopefully make driver authors fix it :-)
1714 */
a9865538 1715 ieee80211_check_queues(sdata, type);
3a25a8c8 1716
34d4bc4d 1717 ieee80211_setup_sdata(sdata, type);
6aea26ce 1718 ieee80211_set_vif_encap_ops(sdata);
34d4bc4d 1719
f142c6b9 1720 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1721 WARN(err, "type change: do_open returned %d", err);
1722
054c9939
JB		 1723 ieee80211_wake_vif_queues(local, sdata,
1724 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
34d4bc4d
JB		 1725 return ret;
1726}
1727
f3947e2d 1728int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1729 enum nl80211_iftype type)
75636525 1730{
34d4bc4d
JB		 1731 int ret;
1732
f3947e2d
JB		 1733 ASSERT_RTNL();
1734
2ca27bcf 1735 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1736 return 0;
1737
34d4bc4d
JB		 1738 if (ieee80211_sdata_running(sdata)) {
1739 ret = ieee80211_runtime_change_iftype(sdata, type);
1740 if (ret)
1741 return ret;
1742 } else {
1743 /* Purge and reset type-dependent state. */
f142c6b9 1744 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1745 ieee80211_setup_sdata(sdata, type);
1746 }
75636525
JB		 1747
1748 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1749 if (type == NL80211_IFTYPE_STATION)
1750 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1751
1752 return 0;
f0706e82
JB		 1753}
1754
fa9029f8 1755static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1756 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1757{
1758 struct ieee80211_sub_if_data *sdata;
1759 u64 mask, start, addr, val, inc;
1760 u8 *m;
1761 u8 tmp_addr[ETH_ALEN];
1762 int i;
1763
1764 /* default ... something at least */
f142c6b9 1765 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1766
1767 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1768 local->hw.wiphy->n_addresses <= 1)
1769 return;
1770
fa9029f8
JB		 1771 mutex_lock(&local->iflist_mtx);
1772
1773 switch (type) {
1774 case NL80211_IFTYPE_MONITOR:
1775 /* doesn't matter */
1776 break;
fa9029f8
JB		 1777 case NL80211_IFTYPE_AP_VLAN:
1778 /* match up with an AP interface */
1779 list_for_each_entry(sdata, &local->interfaces, list) {
1780 if (sdata->vif.type != NL80211_IFTYPE_AP)
1781 continue;
f142c6b9 1782 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1783 break;
1784 }
1785 /* keep default if no AP interface present */
1786 break;
6d71117a
JB		 1787 case NL80211_IFTYPE_P2P_CLIENT:
1788 case NL80211_IFTYPE_P2P_GO:
30686bf7 1789 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1790 list_for_each_entry(sdata, &local->interfaces, list) {
1791 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1792 continue;
1793 if (!ieee80211_sdata_running(sdata))
1794 continue;
1795 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1796 goto out_unlock;
1797 }
1798 }
fc0561dc 1799 fallthrough;
fa9029f8
JB		 1800 default:
1801 /* assign a new address if possible -- try n_addresses first */
1802 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1803 bool used = false;
1804
1805 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1806 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1807 sdata->vif.addr)) {
fa9029f8
JB		 1808 used = true;
1809 break;
1810 }
1811 }
1812
1813 if (!used) {
f142c6b9 1814 memcpy(perm_addr,
fa9029f8
JB		 1815 local->hw.wiphy->addresses[i].addr,
1816 ETH_ALEN);
1817 break;
1818 }
1819 }
1820
1821 /* try mask if available */
1822 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1823 break;
1824
1825 m = local->hw.wiphy->addr_mask;
1826 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1827 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1828 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1829
1830 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1831 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1832 pr_info("not contiguous\n");
fa9029f8
JB		 1833 break;
1834 }
1835
ac20976d
HS		 1836 /*
1837 * Pick address of existing interface in case user changed
1838 * MAC address manually, default to perm_addr.
1839 */
fa9029f8 1840 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1841 list_for_each_entry(sdata, &local->interfaces, list) {
1842 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1843 continue;
1844 m = sdata->vif.addr;
1845 break;
1846 }
fa9029f8
JB		 1847 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1848 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1849 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1850
1851 inc = 1ULL<<__ffs64(mask);
1852 val = (start & mask);
1853 addr = (start & ~mask) | (val & mask);
1854 do {
1855 bool used = false;
1856
1857 tmp_addr[5] = addr >> 0*8;
1858 tmp_addr[4] = addr >> 1*8;
1859 tmp_addr[3] = addr >> 2*8;
1860 tmp_addr[2] = addr >> 3*8;
1861 tmp_addr[1] = addr >> 4*8;
1862 tmp_addr[0] = addr >> 5*8;
1863
1864 val += inc;
1865
1866 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1867 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1868 used = true;
1869 break;
1870 }
1871 }
1872
1873 if (!used) {
f142c6b9 1874 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1875 break;
1876 }
1877 addr = (start & ~mask) | (val & mask);
1878 } while (addr != start);
1879
1880 break;
1881 }
1882
6d71117a 1883 out_unlock:
fa9029f8
JB		 1884 mutex_unlock(&local->iflist_mtx);
1885}
1886
3e122be0 1887int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1888 unsigned char name_assign_type,
84efbb84 1889 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1890 struct vif_params *params)
f0706e82 1891{
f142c6b9 1892 struct net_device *ndev = NULL;
f0706e82 1893 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1894 struct txq_info *txqi;
80a83cfc 1895 void (*if_setup)(struct net_device *dev);
75636525 1896 int ret, i;
ded81f6b 1897 int txqs = 1;
f0706e82
JB		 1898
1899 ASSERT_RTNL();
75636525 1900
708d50ed 1901 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1902 struct wireless_dev *wdev;
1903
1904 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1905 GFP_KERNEL);
1906 if (!sdata)
1907 return -ENOMEM;
1908 wdev = &sdata->wdev;
1909
1910 sdata->dev = NULL;
1911 strlcpy(sdata->name, name, IFNAMSIZ);
1912 ieee80211_assign_perm_addr(local, wdev->address, type);
1913 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1914 } else {
ba8c3d6f
FF		 1915 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1916 sizeof(void *));
1917 int txq_size = 0;
1918
79af1f86
JB		 1919 if (local->ops->wake_tx_queue &&
1920 type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 1921 (type != NL80211_IFTYPE_MONITOR ||
1922 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 1923 txq_size += sizeof(struct txq_info) +
1924 local->hw.txq_data_size;
1925
dbd50a85 1926 if (local->ops->wake_tx_queue) {
80a83cfc 1927 if_setup = ieee80211_if_setup_no_queue;
dbd50a85 1928 } else {
80a83cfc 1929 if_setup = ieee80211_if_setup;
dbd50a85
JB		 1930 if (local->hw.queues >= IEEE80211_NUM_ACS)
1931 txqs = IEEE80211_NUM_ACS;
1932 }
f142c6b9 1933
ba8c3d6f 1934 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1935 name, name_assign_type,
80a83cfc 1936 if_setup, txqs, 1);
f142c6b9
JB		 1937 if (!ndev)
1938 return -ENOMEM;
1f6e0baa
JC		 1939
1940 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1941 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1942
f142c6b9
JB		 1943 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1944
5a490510
JB		 1945 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1946 if (!ndev->tstats) {
1947 free_netdev(ndev);
1948 return -ENOMEM;
1949 }
1950
f142c6b9
JB		 1951 ndev->needed_headroom = local->tx_headroom +
1952 4*6 /* four MAC addresses */
1953 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1954 + 6 /* mesh */
1955 + 8 /* rfc1042/bridge tunnel */
1956 - ETH_HLEN /* ethernet hard_header_len */
1957 + IEEE80211_ENCRYPT_HEADROOM;
1958 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1959
1960 ret = dev_alloc_name(ndev, ndev->name);
1961 if (ret < 0) {
e6436be2 1962 ieee80211_if_free(ndev);
c7a61cba 1963 free_netdev(ndev);
f142c6b9
JB		 1964 return ret;
1965 }
1966
1967 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 1968 if (is_valid_ether_addr(params->macaddr))
b5dfae02
BG		 1969 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1970 else
1971 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1972 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1973
1974 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1975 sdata = netdev_priv(ndev);
1976 ndev->ieee80211_ptr = &sdata->wdev;
1977 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1978 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1979
ba8c3d6f
FF		 1980 if (txq_size) {
1981 txqi = netdev_priv(ndev) + size;
fa962b92 1982 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1983 }
1984
f142c6b9
JB		 1985 sdata->dev = ndev;
1986 }
75636525
JB		 1987
1988 /* initialise type-independent data */
f0706e82 1989 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1990 sdata->local = local;
75636525 1991
3a11ce08 1992 ieee80211_init_frag_cache(&sdata->frags);
75636525
JB		 1993
1994 INIT_LIST_HEAD(&sdata->key_list);
1995
164eb02d
SW		 1996 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1997 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1998 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1999 ieee80211_delayed_tailroom_dec);
97f97b1f 2000
57fbcce3 2001 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 2002 struct ieee80211_supported_band *sband;
2003 sband = local->hw.wiphy->bands[i];
2004 sdata->rc_rateidx_mask[i] =
2005 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 2006 if (sband) {
2007 __le16 cap;
2008 u16 *vht_rate_mask;
2009
19468413
SW		 2010 memcpy(sdata->rc_rateidx_mcs_mask[i],
2011 sband->ht_cap.mcs.rx_mask,
2012 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 2013
2014 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2015 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2016 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2017 } else {
19468413
SW		 2018 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2019 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 2020 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2021 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2022 }
37eb0b16 2023 }
75636525 2024
2433647b
THJ		 2025 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2026 init_airtime_info(&sdata->airtime[i], &local->airtime[i]);
2027
3a25a8c8
JB		 2028 ieee80211_set_default_queues(sdata);
2029
1ea6f9c0
JB		 2030 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2031 sdata->user_power_level = local->user_power_level;
2032
2475b1cc
MS		 2033 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2034
75636525
JB		 2035 /* setup type-dependent data */
2036 ieee80211_setup_sdata(sdata, type);
f0706e82 2037
f142c6b9 2038 if (ndev) {
dd665d23
JB		 2039 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2040 if (type == NL80211_IFTYPE_STATION)
2041 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 2042
f142c6b9 2043 ndev->features |= local->hw.netdev_features;
07b83d2e
JB		 2044 ndev->hw_features |= ndev->features &
2045 MAC80211_SUPPORTED_FEATURES_TX;
72d78728 2046
b7ffbd7e
JB		 2047 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2048
79f5962b
JA		 2049 /* MTU range is normally 256 - 2304, where the upper limit is
2050 * the maximum MSDU size. Monitor interfaces send and receive
2051 * MPDU and A-MSDU frames which may be much larger so we do
2052 * not impose an upper limit in that case.
2053 */
9c22b4a3 2054 ndev->min_mtu = 256;
79f5962b
JA		 2055 if (type == NL80211_IFTYPE_MONITOR)
2056 ndev->max_mtu = 0;
2057 else
2058 ndev->max_mtu = local->hw.max_mtu;
9c22b4a3 2059
2fe8ef10 2060 ret = cfg80211_register_netdevice(ndev);
f142c6b9 2061 if (ret) {
cf124db5 2062 free_netdev(ndev);
f142c6b9
JB		 2063 return ret;
2064 }
2065 }
f0706e82 2066
c771c9d8 2067 mutex_lock(&local->iflist_mtx);
79010420 2068 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 2069 mutex_unlock(&local->iflist_mtx);
79010420 2070
84efbb84
JB		 2071 if (new_wdev)
2072 *new_wdev = &sdata->wdev;
f0706e82 2073
f0706e82 2074 return 0;
f0706e82
JB		 2075}
2076
f698d856 2077void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 2078{
f0706e82 2079 ASSERT_RTNL();
11a843b7 2080
c771c9d8 2081 mutex_lock(&sdata->local->iflist_mtx);
75636525 2082 list_del_rcu(&sdata->list);
c771c9d8
JB		 2083 mutex_unlock(&sdata->local->iflist_mtx);
2084
f1267cf3
BP		 2085 if (sdata->vif.txq)
2086 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2087
75636525 2088 synchronize_rcu();
f142c6b9 2089
2fe8ef10
JB		 2090 cfg80211_unregister_wdev(&sdata->wdev);
2091
2092 if (!sdata->dev) {
835112b2 2093 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 2094 kfree(sdata);
2095 }
2096}
2097
2098void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2099{
2100 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2101 return;
2102 ieee80211_do_stop(sdata, true);
f0706e82
JB		 2103}
2104
75636525 2105void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 2106{
75636525 2107 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 2108 LIST_HEAD(unreg_list);
f142c6b9 2109 LIST_HEAD(wdev_list);
f0706e82
JB		 2110
2111 ASSERT_RTNL();
2112
d8d9008c
JB		 2113 /* Before destroying the interfaces, make sure they're all stopped so
2114 * that the hardware is stopped. Otherwise, the driver might still be
2115 * iterating the interfaces during the shutdown, e.g. from a worker
2116 * or from RX processing or similar, and if it does so (using atomic
2117 * iteration) while we're manipulating the list, the iteration will
2118 * crash.
2119 *
2120 * After this, the hardware should be stopped and the driver should
2121 * have stopped all of its activities, so that we can do RCU-unaware
2122 * manipulations of the interface list below.
c8aa22db 2123 */
d8d9008c
JB		 2124 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2125
2126 WARN(local->open_count, "%s: open count remains %d\n",
2127 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 2128
a50e5fb8
SS		 2129 ieee80211_txq_teardown_flows(local);
2130
efe117ab 2131 mutex_lock(&local->iflist_mtx);
75636525
JB		 2132 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2133 list_del(&sdata->list);
c771c9d8 2134
f142c6b9
JB		 2135 if (sdata->dev)
2136 unregister_netdevice_queue(sdata->dev, &unreg_list);
2137 else
2138 list_add(&sdata->list, &wdev_list);
f0706e82 2139 }
efe117ab 2140 mutex_unlock(&local->iflist_mtx);
a05829a7 2141
efe117ab 2142 unregister_netdevice_many(&unreg_list);
f142c6b9 2143
a05829a7 2144 wiphy_lock(local->hw.wiphy);
f142c6b9
JB		 2145 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2146 list_del(&sdata->list);
2147 cfg80211_unregister_wdev(&sdata->wdev);
2148 kfree(sdata);
2149 }
a05829a7 2150 wiphy_unlock(local->hw.wiphy);
f0706e82 2151}
5cff20e6 2152
47846c9b 2153static int netdev_notify(struct notifier_block *nb,
351638e7 2154 unsigned long state, void *ptr)
47846c9b 2155{
351638e7 2156 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 2157 struct ieee80211_sub_if_data *sdata;
2158
2159 if (state != NETDEV_CHANGENAME)
8bd811aa 2160 return NOTIFY_DONE;
47846c9b
JB		 2161
2162 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 2163 return NOTIFY_DONE;
47846c9b
JB		 2164
2165 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2166 return NOTIFY_DONE;
47846c9b
JB		 2167
2168 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2169 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2170 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2171
2172 return NOTIFY_OK;
47846c9b
JB		 2173}
2174
2175static struct notifier_block mac80211_netdev_notifier = {
2176 .notifier_call = netdev_notify,
2177};
2178
2179int ieee80211_iface_init(void)
2180{
2181 return register_netdevice_notifier(&mac80211_netdev_notifier);
2182}
2183
2184void ieee80211_iface_exit(void)
2185{
2186 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2187}
72f15d53
MB		 2188
2189void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2190{
2191 if (sdata->vif.type == NL80211_IFTYPE_AP)
2192 atomic_inc(&sdata->u.ap.num_mcast_sta);
2193 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2194 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2195}
2196
2197void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2198{
2199 if (sdata->vif.type == NL80211_IFTYPE_AP)
2200 atomic_dec(&sdata->u.ap.num_mcast_sta);
2201 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2202 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2203}
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