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mac80211: extend ieee80211_tx_status_ext to support bulk free
[linux.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 <[email protected]>
75636525 8 * Copyright 2008, Johannes Berg <[email protected]>
d98ad83e 9 * Copyright 2013-2014 Intel Mobile Communications GmbH
d2941df8 10 * Copyright (c) 2016 Intel Deutschland GmbH
52b4810b 11 * Copyright (C) 2018-2020 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>
18#include <net/mac80211.h>
cf0277e7 19#include <net/ieee80211_radiotap.h>
f0706e82
JB		 20#include "ieee80211_i.h"
21#include "sta_info.h"
e9f207f0 22#include "debugfs_netdev.h"
ee385855 23#include "mesh.h"
0d143fe1 24#include "led.h"
24487981 25#include "driver-ops.h"
cf0277e7 26#include "wme.h"
1be7fe8d 27#include "rate.h"
0d143fe1 28
c771c9d8
JB		 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
42bd20d9 45static void ieee80211_iface_work(struct work_struct *work);
6aea26ce 46static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata);
42bd20d9 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_WDS) ||
235 (type1 == NL80211_IFTYPE_WDS &&
236 (type2 == NL80211_IFTYPE_WDS ||
237 type2 == NL80211_IFTYPE_AP)) ||
238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
239 (type1 == NL80211_IFTYPE_AP_VLAN &&
240 (type2 == NL80211_IFTYPE_AP ||
241 type2 == NL80211_IFTYPE_AP_VLAN));
242}
243
87490f6d
JB		 244static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
245 enum nl80211_iftype iftype)
0d143fe1 246{
b4a4bf5d 247 struct ieee80211_local *local = sdata->local;
87490f6d 248 struct ieee80211_sub_if_data *nsdata;
b6a55015 249 int ret;
0d143fe1 250
87490f6d 251 ASSERT_RTNL();
0d143fe1
JB		 252
253 /* we hold the RTNL here so can safely walk the list */
254 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 255 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 256 /*
257 * Only OCB and monitor mode may coexist
258 */
259 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
260 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
261 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
262 nsdata->vif.type == NL80211_IFTYPE_OCB))
263 return -EBUSY;
264
0d143fe1
JB		 265 /*
266 * Allow only a single IBSS interface to be up at any
267 * time. This is restricted because beacon distribution
268 * cannot work properly if both are in the same IBSS.
269 *
270 * To remove this restriction we'd have to disallow them
271 * from setting the same SSID on different IBSS interfaces
272 * belonging to the same hardware. Then, however, we're
273 * faced with having to adopt two different TSF timers...
274 */
87490f6d 275 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 276 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
277 return -EBUSY;
73da7d5b
SW		 278 /*
279 * will not add another interface while any channel
280 * switch is active.
281 */
282 if (nsdata->vif.csa_active)
283 return -EBUSY;
0d143fe1
JB		 284
285 /*
286 * The remaining checks are only performed for interfaces
287 * with the same MAC address.
288 */
371a255e
JB		 289 if (!ether_addr_equal(sdata->vif.addr,
290 nsdata->vif.addr))
0d143fe1
JB		 291 continue;
292
293 /*
294 * check whether it may have the same address
295 */
87490f6d 296 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 297 nsdata->vif.type))
298 return -ENOTUNIQ;
299
300 /*
301 * can only add VLANs to enabled APs
302 */
87490f6d 303 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 304 nsdata->vif.type == NL80211_IFTYPE_AP)
305 sdata->bss = &nsdata->u.ap;
306 }
307 }
308
b6a55015
LC		 309 mutex_lock(&local->chanctx_mtx);
310 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
311 mutex_unlock(&local->chanctx_mtx);
312 return ret;
87490f6d
JB		 313}
314
a9865538
JB		 315static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
316 enum nl80211_iftype iftype)
3a25a8c8
JB		 317{
318 int n_queues = sdata->local->hw.queues;
319 int i;
320
708d50ed
AB		 321 if (iftype == NL80211_IFTYPE_NAN)
322 return 0;
323
a9865538 324 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 325 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
326 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
327 IEEE80211_INVAL_HW_QUEUE))
328 return -EINVAL;
329 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
330 n_queues))
331 return -EINVAL;
332 }
3a25a8c8
JB		 333 }
334
a9865538
JB		 335 if ((iftype != NL80211_IFTYPE_AP &&
336 iftype != NL80211_IFTYPE_P2P_GO &&
337 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 338 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 339 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
340 return 0;
341 }
342
343 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
344 return -EINVAL;
345
346 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
347 return -EINVAL;
348
349 return 0;
350}
351
6aea26ce
FF		 352static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
353{
354 switch (iftype) {
355 /* P2P GO and client are mapped to AP/STATION types */
356 case NL80211_IFTYPE_AP:
357 case NL80211_IFTYPE_STATION:
358 return true;
359 default:
360 return false;
361 }
362}
363
364static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
365{
366 struct ieee80211_local *local = sdata->local;
367 u32 flags;
368
369 flags = sdata->vif.offload_flags;
370
371 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
372 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
373 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
374
375 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
376 local->hw.wiphy->frag_threshold != (u32)-1)
377 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
378
379 if (local->monitors)
380 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
381 } else {
382 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
383 }
384
385 if (sdata->vif.offload_flags == flags)
386 return false;
387
388 sdata->vif.offload_flags = flags;
389 return true;
390}
391
392
393static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
394{
395 struct ieee80211_local *local = sdata->local;
396 struct ieee80211_sub_if_data *vsdata;
397
398 if (ieee80211_set_sdata_offload_flags(sdata)) {
399 drv_update_vif_offload(local, sdata);
400 ieee80211_set_vif_encap_ops(sdata);
401 }
402
403 list_for_each_entry(vsdata, &local->interfaces, list) {
404 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
405 vsdata->bss != &sdata->u.ap)
406 continue;
407
408 ieee80211_set_vif_encap_ops(vsdata);
409 }
410}
411
412void ieee80211_recalc_offload(struct ieee80211_local *local)
413{
414 struct ieee80211_sub_if_data *sdata;
415
416 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
417 return;
418
419 mutex_lock(&local->iflist_mtx);
420
421 list_for_each_entry(sdata, &local->interfaces, list) {
422 if (!ieee80211_sdata_running(sdata))
423 continue;
424
425 ieee80211_recalc_sdata_offload(sdata);
426 }
427
428 mutex_unlock(&local->iflist_mtx);
429}
430
85416a4f
CL		 431void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
432 const int offset)
433{
434 struct ieee80211_local *local = sdata->local;
d8212184 435 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 436
437#define ADJUST(_f, _s) do { \
438 if (flags & MONITOR_FLAG_##_f) \
439 local->fif_##_s += offset; \
440 } while (0)
441
442 ADJUST(FCSFAIL, fcsfail);
443 ADJUST(PLCPFAIL, plcpfail);
444 ADJUST(CONTROL, control);
445 ADJUST(CONTROL, pspoll);
446 ADJUST(OTHER_BSS, other_bss);
447
448#undef ADJUST
449}
450
3a25a8c8
JB		 451static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
452{
453 struct ieee80211_local *local = sdata->local;
454 int i;
455
456 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 457 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 458 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 459 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 460 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 461 else
462 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 463 }
464 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
465}
466
3c3e21e7 467int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 468{
469 struct ieee80211_sub_if_data *sdata;
8b305780 470 int ret;
4b6f1dd6 471
30686bf7 472 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 473 return 0;
474
8b305780 475 ASSERT_RTNL();
685fb72b 476
4b6f1dd6 477 if (local->monitor_sdata)
8b305780 478 return 0;
4b6f1dd6
JB		 479
480 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 481 if (!sdata)
482 return -ENOMEM;
4b6f1dd6
JB		 483
484 /* set up data */
485 sdata->local = local;
486 sdata->vif.type = NL80211_IFTYPE_MONITOR;
487 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
488 wiphy_name(local->hw.wiphy));
34171dc0 489 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 490
2475b1cc
MS		 491 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
492
3a25a8c8
JB		 493 ieee80211_set_default_queues(sdata);
494
4b6f1dd6
JB		 495 ret = drv_add_interface(local, sdata);
496 if (WARN_ON(ret)) {
497 /* ok .. stupid driver, it asked for this! */
498 kfree(sdata);
8b305780 499 return ret;
4b6f1dd6
JB		 500 }
501
a9865538 502 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 503 if (ret) {
504 kfree(sdata);
8b305780 505 return ret;
3a25a8c8
JB		 506 }
507
fab57a6c
JB		 508 mutex_lock(&local->iflist_mtx);
509 rcu_assign_pointer(local->monitor_sdata, sdata);
510 mutex_unlock(&local->iflist_mtx);
511
34a3740d 512 mutex_lock(&local->mtx);
4bf88530 513 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 514 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 515 mutex_unlock(&local->mtx);
55de908a 516 if (ret) {
fab57a6c 517 mutex_lock(&local->iflist_mtx);
0c2bef46 518 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 519 mutex_unlock(&local->iflist_mtx);
520 synchronize_net();
55de908a
JB		 521 drv_remove_interface(local, sdata);
522 kfree(sdata);
8b305780 523 return ret;
55de908a
JB		 524 }
525
42bd20d9
AE		 526 skb_queue_head_init(&sdata->skb_queue);
527 INIT_WORK(&sdata->work, ieee80211_iface_work);
528
8b305780 529 return 0;
4b6f1dd6
JB		 530}
531
3c3e21e7 532void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 533{
534 struct ieee80211_sub_if_data *sdata;
535
30686bf7 536 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 537 return;
538
8b305780
JB		 539 ASSERT_RTNL();
540
685fb72b 541 mutex_lock(&local->iflist_mtx);
4b6f1dd6 542
685fb72b
JB		 543 sdata = rcu_dereference_protected(local->monitor_sdata,
544 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 545 if (!sdata) {
546 mutex_unlock(&local->iflist_mtx);
547 return;
548 }
4b6f1dd6 549
0c2bef46 550 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 551 mutex_unlock(&local->iflist_mtx);
552
4b6f1dd6
JB		 553 synchronize_net();
554
34a3740d 555 mutex_lock(&local->mtx);
55de908a 556 ieee80211_vif_release_channel(sdata);
34a3740d 557 mutex_unlock(&local->mtx);
55de908a 558
4b6f1dd6
JB		 559 drv_remove_interface(local, sdata);
560
561 kfree(sdata);
562}
563
34d4bc4d
JB		 564/*
565 * NOTE: Be very careful when changing this function, it must NOT return
566 * an error on interface type changes that have been pre-checked, so most
567 * checks should be in ieee80211_check_concurrent_iface.
568 */
f142c6b9 569int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 570{
f142c6b9
JB		 571 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
572 struct net_device *dev = wdev->netdev;
87490f6d
JB		 573 struct ieee80211_local *local = sdata->local;
574 struct sta_info *sta;
575 u32 changed = 0;
576 int res;
577 u32 hw_reconf_flags = 0;
578
0d143fe1
JB		 579 switch (sdata->vif.type) {
580 case NL80211_IFTYPE_WDS:
581 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
582 return -ENOLINK;
583 break;
665c93a9
JB		 584 case NL80211_IFTYPE_AP_VLAN: {
585 struct ieee80211_sub_if_data *master;
586
0d143fe1
JB		 587 if (!sdata->bss)
588 return -ENOLINK;
665c93a9 589
4e141dad 590 mutex_lock(&local->mtx);
0d143fe1 591 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 592 mutex_unlock(&local->mtx);
665c93a9
JB		 593
594 master = container_of(sdata->bss,
595 struct ieee80211_sub_if_data, u.ap);
596 sdata->control_port_protocol =
597 master->control_port_protocol;
598 sdata->control_port_no_encrypt =
599 master->control_port_no_encrypt;
018f6fbf
DK		 600 sdata->control_port_over_nl80211 =
601 master->control_port_over_nl80211;
7f3f96ce
MT		 602 sdata->control_port_no_preauth =
603 master->control_port_no_preauth;
1351c5d3
JB		 604 sdata->vif.cab_queue = master->vif.cab_queue;
605 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
606 sizeof(sdata->vif.hw_queue));
2967e031 607 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 608
609 mutex_lock(&local->key_mtx);
610 sdata->crypto_tx_tailroom_needed_cnt +=
611 master->crypto_tx_tailroom_needed_cnt;
612 mutex_unlock(&local->key_mtx);
613
0d143fe1 614 break;
665c93a9 615 }
0d143fe1
JB		 616 case NL80211_IFTYPE_AP:
617 sdata->bss = &sdata->u.ap;
618 break;
619 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 620 case NL80211_IFTYPE_STATION:
621 case NL80211_IFTYPE_MONITOR:
622 case NL80211_IFTYPE_ADHOC:
f142c6b9 623 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 624 case NL80211_IFTYPE_OCB:
cb3b7d87 625 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 626 /* no special treatment */
627 break;
628 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 629 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 630 case NL80211_IFTYPE_P2P_CLIENT:
631 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 632 /* cannot happen */
633 WARN_ON(1);
634 break;
635 }
636
637 if (local->open_count == 0) {
24487981 638 res = drv_start(local);
0d143fe1
JB		 639 if (res)
640 goto err_del_bss;
e8975581
JB		 641 /* we're brought up, everything changes */
642 hw_reconf_flags = ~0;
1f87f7d3 643 ieee80211_led_radio(local, true);
67408c8c
JB		 644 ieee80211_mod_tpt_led_trig(local,
645 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 646 }
647
648 /*
bf533e0b
JB		 649 * Copy the hopefully now-present MAC address to
650 * this interface, if it has the special null one.
0d143fe1 651 */
f142c6b9 652 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 653 memcpy(dev->dev_addr,
654 local->hw.wiphy->perm_addr,
655 ETH_ALEN);
656 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
657
658 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 659 res = -EADDRNOTAVAIL;
660 goto err_stop;
0adc23f5 661 }
0d143fe1
JB		 662 }
663
0d143fe1
JB		 664 switch (sdata->vif.type) {
665 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 666 /* no need to tell driver, but set carrier and chanctx */
667 if (rtnl_dereference(sdata->bss->beacon)) {
668 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 669 netif_carrier_on(dev);
6aea26ce 670 ieee80211_set_vif_encap_ops(sdata);
4d76d21b 671 } else {
3edaf3e6 672 netif_carrier_off(dev);
4d76d21b 673 }
0d143fe1
JB		 674 break;
675 case NL80211_IFTYPE_MONITOR:
d8212184 676 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 677 local->cooked_mntrs++;
678 break;
679 }
680
d8212184 681 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 682 res = drv_add_interface(local, sdata);
683 if (res)
684 goto err_stop;
685 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 686 res = ieee80211_add_virtual_monitor(local);
687 if (res)
688 goto err_stop;
689 }
690
0d143fe1
JB		 691 /* must be before the call to ieee80211_configure_filter */
692 local->monitors++;
e8975581 693 if (local->monitors == 1) {
0869aea0
JB		 694 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
695 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 696 }
0d143fe1 697
85416a4f 698 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 699 ieee80211_configure_filter(local);
6aea26ce 700 ieee80211_recalc_offload(local);
801d929c
FF		 701 mutex_lock(&local->mtx);
702 ieee80211_recalc_idle(local);
703 mutex_unlock(&local->mtx);
53e9b1de
DG		 704
705 netif_carrier_on(dev);
0d143fe1 706 break;
0d143fe1 707 default:
34d4bc4d 708 if (coming_up) {
075e0847 709 ieee80211_del_virtual_monitor(local);
6aea26ce 710 ieee80211_set_sdata_offload_flags(sdata);
075e0847 711
7b7eab6f 712 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 713 if (res)
714 goto err_stop;
6aea26ce
FF		 715
716 ieee80211_set_vif_encap_ops(sdata);
a9865538
JB		 717 res = ieee80211_check_queues(sdata,
718 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 719 if (res)
720 goto err_del_interface;
34d4bc4d 721 }
0d143fe1 722
29cbe68c 723 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 724 local->fif_pspoll++;
7be5086d 725 local->fif_probe_req++;
e3b90ca2 726
e3b90ca2 727 ieee80211_configure_filter(local);
7be5086d
JB		 728 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
729 local->fif_probe_req++;
a3c9aa51 730 }
e3b90ca2 731
90e8f58d
JB		 732 if (sdata->vif.probe_req_reg)
733 drv_config_iface_filter(local, sdata,
734 FIF_PROBE_REQ,
735 FIF_PROBE_REQ);
736
708d50ed
AB		 737 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
738 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 739 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 740 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 741
c405c629
JB		 742 switch (sdata->vif.type) {
743 case NL80211_IFTYPE_STATION:
744 case NL80211_IFTYPE_ADHOC:
745 case NL80211_IFTYPE_AP:
746 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 747 case NL80211_IFTYPE_OCB:
0d143fe1 748 netif_carrier_off(dev);
c405c629 749 break;
1411af15 750 case NL80211_IFTYPE_WDS:
f142c6b9 751 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 752 case NL80211_IFTYPE_NAN:
1411af15 753 break;
c405c629 754 default:
a2310824
JB		 755 /* not reached */
756 WARN_ON(1);
c405c629 757 }
59034591
EP		 758
759 /*
cec66283 760 * Set default queue parameters so drivers don't
59034591 761 * need to initialise the hardware if the hardware
cec66283
JB		 762 * doesn't start up with sane defaults.
763 * Enable QoS for anything but station interfaces.
59034591 764 */
cec66283
JB		 765 ieee80211_set_wmm_default(sdata, true,
766 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 767 }
768
2d2080c3
JB		 769 set_bit(SDATA_STATE_RUNNING, &sdata->state);
770
f64331d5
JB		 771 switch (sdata->vif.type) {
772 case NL80211_IFTYPE_WDS:
0d143fe1
JB		 773 /* Create STA entry for the WDS peer */
774 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
775 GFP_KERNEL);
776 if (!sta) {
777 res = -ENOMEM;
778 goto err_del_interface;
779 }
780
83d5cc01
JB		 781 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
782 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
783 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 784
785 res = sta_info_insert(sta);
786 if (res) {
787 /* STA has been freed */
788 goto err_del_interface;
789 }
1be7fe8d
BJ		 790
791 rate_control_rate_init(sta);
1411af15 792 netif_carrier_on(dev);
f64331d5
JB		 793 break;
794 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9 795 rcu_assign_pointer(local->p2p_sdata, sdata);
f64331d5
JB		 796 break;
797 case NL80211_IFTYPE_MONITOR:
798 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
799 break;
800 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
801 break;
802 default:
803 break;
0d143fe1
JB		 804 }
805
0d143fe1
JB		 806 /*
807 * set_multicast_list will be invoked by the networking core
808 * which will check whether any increments here were done in
809 * error and sync them down to the hardware as filter flags.
810 */
811 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
812 atomic_inc(&local->iff_allmultis);
813
34d4bc4d
JB		 814 if (coming_up)
815 local->open_count++;
816
59034591 817 if (hw_reconf_flags)
e8975581 818 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 819
4a733ef1 820 ieee80211_recalc_ps(local);
965bedad 821
2b436312 822 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
7d65f829
JB		 823 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
824 local->ops->wake_tx_queue) {
2b436312 825 /* XXX: for AP_VLAN, actually track AP queues */
89e9bfc4
CL		 826 if (dev)
827 netif_tx_start_all_queues(dev);
2b436312 828 } else if (dev) {
2b730daa
JB		 829 unsigned long flags;
830 int n_acs = IEEE80211_NUM_ACS;
831 int ac;
832
833 if (local->hw.queues < IEEE80211_NUM_ACS)
834 n_acs = 1;
835
836 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
837 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
838 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
839 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
840 for (ac = 0; ac < n_acs; ac++) {
841 int ac_queue = sdata->vif.hw_queue[ac];
842
843 if (local->queue_stop_reasons[ac_queue] == 0 &&
844 skb_queue_empty(&local->pending[ac_queue]))
845 netif_start_subqueue(dev, ac);
846 }
847 }
848 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
849 }
0d143fe1
JB		 850
851 return 0;
852 err_del_interface:
7b7eab6f 853 drv_remove_interface(local, sdata);
0d143fe1 854 err_stop:
24487981
JB		 855 if (!local->open_count)
856 drv_stop(local);
0d143fe1
JB		 857 err_del_bss:
858 sdata->bss = NULL;
4e141dad
MK		 859 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
860 mutex_lock(&local->mtx);
0d143fe1 861 list_del(&sdata->u.vlan.list);
4e141dad
MK		 862 mutex_unlock(&local->mtx);
863 }
4d6c36fa 864 /* might already be clear but that doesn't matter */
2d2080c3 865 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 866 return res;
867}
868
34d4bc4d 869static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 870{
871 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 872 int err;
873
874 /* fail early if user set an invalid address */
2fcf2824 875 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 876 return -EADDRNOTAVAIL;
877
878 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
879 if (err)
880 return err;
881
f142c6b9 882 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 883}
884
885static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
886 bool going_down)
887{
0d143fe1 888 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 889 unsigned long flags;
890 struct sk_buff *skb, *tmp;
e8975581 891 u32 hw_reconf_flags = 0;
09f4114e 892 int i, flushed;
397a7a24 893 struct ps_data *ps;
d2859df5 894 struct cfg80211_chan_def chandef;
46238845 895 bool cancel_scan;
167e33f4 896 struct cfg80211_nan_func *func;
0d143fe1 897
c29acf20
RM		 898 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
899
46238845
JB		 900 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
901 if (cancel_scan)
352ffad6
BC		 902 ieee80211_scan_cancel(local);
903
0d143fe1
JB		 904 /*
905 * Stop TX on this interface first.
906 */
f142c6b9
JB		 907 if (sdata->dev)
908 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 909
c8f994ee 910 ieee80211_roc_purge(local, sdata);
af6b6374 911
8ffcc704
EG		 912 switch (sdata->vif.type) {
913 case NL80211_IFTYPE_STATION:
572078be 914 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 915 break;
916 case NL80211_IFTYPE_ADHOC:
cd7760e6 917 ieee80211_ibss_stop(sdata);
8ffcc704 918 break;
f64331d5
JB		 919 case NL80211_IFTYPE_MONITOR:
920 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
921 break;
922 list_del_rcu(&sdata->u.mntr.list);
923 break;
8ffcc704
EG		 924 default:
925 break;
926 }
cd7760e6 927
0d143fe1
JB		 928 /*
929 * Remove all stations associated with this interface.
930 *
931 * This must be done before calling ops->remove_interface()
932 * because otherwise we can later invoke ops->sta_notify()
933 * whenever the STAs are removed, and that invalidates driver
934 * assumptions about always getting a vif pointer that is valid
935 * (because if we remove a STA after ops->remove_interface()
936 * the driver will have removed the vif info already!)
937 *
5eb8f4d7
JB		 938 * In WDS mode a station must exist here and be flushed, for
939 * AP_VLANs stations may exist since there's nothing else that
940 * would have removed them, but in other modes there shouldn't
941 * be any stations.
0d143fe1 942 */
d34ba216 943 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 944 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
945 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
946 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 947
df140465 948 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 949 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
950 atomic_dec(&local->iff_allmultis);
951
7be5086d 952 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 953 local->fif_pspoll--;
7be5086d
JB		 954 local->fif_probe_req--;
955 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
956 local->fif_probe_req--;
957 }
e3b90ca2 958
f142c6b9
JB		 959 if (sdata->dev) {
960 netif_addr_lock_bh(sdata->dev);
961 spin_lock_bh(&local->filter_lock);
962 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
963 sdata->dev->addr_len);
964 spin_unlock_bh(&local->filter_lock);
965 netif_addr_unlock_bh(sdata->dev);
f142c6b9 966 }
3ac64bee 967
7cbf0ba5
VN		 968 del_timer_sync(&local->dynamic_ps_timer);
969 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 970
04ecd257 971 cancel_work_sync(&sdata->recalc_smps);
dbd72850 972 sdata_lock(sdata);
59af6928 973 mutex_lock(&local->mtx);
73da7d5b 974 sdata->vif.csa_active = false;
0c21e632
LC		 975 if (sdata->vif.type == NL80211_IFTYPE_STATION)
976 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 977 if (sdata->csa_block_tx) {
978 ieee80211_wake_vif_queues(local, sdata,
979 IEEE80211_QUEUE_STOP_REASON_CSA);
980 sdata->csa_block_tx = false;
981 }
59af6928 982 mutex_unlock(&local->mtx);
dbd72850 983 sdata_unlock(sdata);
59af6928 984
73da7d5b 985 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 986
164eb02d
SW		 987 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
988
989 if (sdata->wdev.cac_started) {
d2859df5 990 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 991 WARN_ON(local->suspended);
34a3740d 992 mutex_lock(&local->mtx);
164eb02d 993 ieee80211_vif_release_channel(sdata);
34a3740d 994 mutex_unlock(&local->mtx);
d2859df5
JD		 995 cfg80211_cac_event(sdata->dev, &chandef,
996 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 997 GFP_KERNEL);
998 }
999
0d143fe1
JB		 1000 /* APs need special treatment */
1001 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 1002 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 1003
1004 /* down all dependent devices, that is VLANs */
57c9fff3 1005 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 1006 u.vlan.list)
1007 dev_close(vlan->dev);
1008 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 1009 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1010 /* remove all packets in parent bc_buf pointing to this dev */
1011 ps = &sdata->bss->ps;
1012
1013 spin_lock_irqsave(&ps->bc_buf.lock, flags);
1014 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
1015 if (skb->dev == sdata->dev) {
1016 __skb_unlink(skb, &ps->bc_buf);
1017 local->total_ps_buffered--;
1018 ieee80211_free_txskb(&local->hw, skb);
1019 }
1020 }
1021 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 1022 }
1023
34d4bc4d
JB		 1024 if (going_down)
1025 local->open_count--;
0d143fe1
JB		 1026
1027 switch (sdata->vif.type) {
1028 case NL80211_IFTYPE_AP_VLAN:
4e141dad 1029 mutex_lock(&local->mtx);
0d143fe1 1030 list_del(&sdata->u.vlan.list);
4e141dad 1031 mutex_unlock(&local->mtx);
0c2bef46 1032 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 1033 /* see comment in the default case below */
1034 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 1035 /* no need to tell driver */
1036 break;
1037 case NL80211_IFTYPE_MONITOR:
d8212184 1038 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 1039 local->cooked_mntrs--;
1040 break;
1041 }
1042
1043 local->monitors--;
e8975581 1044 if (local->monitors == 0) {
0869aea0
JB		 1045 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
1046 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 1047 }
0d143fe1 1048
85416a4f 1049 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 1050 break;
167e33f4
AB		 1051 case NL80211_IFTYPE_NAN:
1052 /* clean all the functions */
1053 spin_lock_bh(&sdata->u.nan.func_lock);
1054
1055 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
1056 idr_remove(&sdata->u.nan.function_inst_ids, i);
1057 cfg80211_free_nan_func(func);
1058 }
1059 idr_destroy(&sdata->u.nan.function_inst_ids);
1060
1061 spin_unlock_bh(&sdata->u.nan.func_lock);
1062 break;
f142c6b9
JB		 1063 case NL80211_IFTYPE_P2P_DEVICE:
1064 /* relies on synchronize_rcu() below */
0c2bef46 1065 RCU_INIT_POINTER(local->p2p_sdata, NULL);
fc0561dc 1066 fallthrough;
0d143fe1 1067 default:
0b7dff4f 1068 cancel_work_sync(&sdata->work);
35f20c14
JB		 1069 /*
1070 * When we get here, the interface is marked down.
7907c7d3 1071 * Free the remaining keys, if there are any
10b68487
FF		 1072 * (which can happen in AP mode if userspace sets
1073 * keys before the interface is operating, and maybe
1074 * also in WDS mode)
75de9113 1075 *
7907c7d3
JB		 1076 * Force the key freeing to always synchronize_net()
1077 * to wait for the RX path in case it is using this
10b68487 1078 * interface enqueuing frames at this very time on
75de9113 1079 * another CPU.
35f20c14 1080 */
7907c7d3 1081 ieee80211_free_keys(sdata, true);
1861b845 1082 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 1083 }
1084
5061b0c2
JB		 1085 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1086 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1087 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1088 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1089 if (info->control.vif == &sdata->vif) {
1090 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 1091 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 1092 }
1093 }
1094 }
1095 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 1096
2a9e2579
JB		 1097 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1098 ieee80211_txq_remove_vlan(local, sdata);
53168215 1099
2a9e2579 1100 sdata->bss = NULL;
ba8c3d6f 1101
b2c0958b
JB		 1102 if (local->open_count == 0)
1103 ieee80211_clear_tx_pending(local);
1104
5c21e810
BG		 1105 sdata->vif.bss_conf.beacon_int = 0;
1106
b2c0958b
JB		 1107 /*
1108 * If the interface goes down while suspended, presumably because
1109 * the device was unplugged and that happens before our resume,
1110 * then the driver is already unconfigured and the remainder of
1111 * this function isn't needed.
1112 * XXX: what about WoWLAN? If the device has software state, e.g.
1113 * memory allocated, it might expect teardown commands from
1114 * mac80211 here?
1115 */
1116 if (local->suspended) {
1117 WARN_ON(local->wowlan);
1118 WARN_ON(rtnl_dereference(local->monitor_sdata));
1119 return;
1120 }
1121
1122 switch (sdata->vif.type) {
1123 case NL80211_IFTYPE_AP_VLAN:
1124 break;
1125 case NL80211_IFTYPE_MONITOR:
1126 if (local->monitors == 0)
1127 ieee80211_del_virtual_monitor(local);
1128
1129 mutex_lock(&local->mtx);
1130 ieee80211_recalc_idle(local);
1131 mutex_unlock(&local->mtx);
31eba5bc 1132
d8212184 1133 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1134 break;
1135
fc0561dc 1136 fallthrough;
b2c0958b
JB		 1137 default:
1138 if (going_down)
1139 drv_remove_interface(local, sdata);
1140 }
1141
4a733ef1 1142 ieee80211_recalc_ps(local);
b2c0958b 1143
46238845
JB		 1144 if (cancel_scan)
1145 flush_delayed_work(&local->scan_work);
1146
b2c0958b
JB		 1147 if (local->open_count == 0) {
1148 ieee80211_stop_device(local);
1149
1150 /* no reconfiguring after stop! */
1151 return;
1152 }
1153
1154 /* do after stop to avoid reconfiguring when we stop anyway */
1155 ieee80211_configure_filter(local);
1156 ieee80211_hw_config(local, hw_reconf_flags);
1157
1158 if (local->monitors == local->open_count)
075e0847 1159 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1160}
1161
1162static int ieee80211_stop(struct net_device *dev)
1163{
1164 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1165
1166 ieee80211_do_stop(sdata, true);
5061b0c2 1167
0d143fe1
JB		 1168 return 0;
1169}
1170
1171static void ieee80211_set_multicast_list(struct net_device *dev)
1172{
0d143fe1 1173 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1174 struct ieee80211_local *local = sdata->local;
df140465 1175 int allmulti, sdata_allmulti;
0d143fe1
JB		 1176
1177 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1178 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1179
1180 if (allmulti != sdata_allmulti) {
1181 if (dev->flags & IFF_ALLMULTI)
1182 atomic_inc(&local->iff_allmultis);
1183 else
1184 atomic_dec(&local->iff_allmultis);
1185 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1186 }
1187
3b8d81e0 1188 spin_lock_bh(&local->filter_lock);
22bedad3 1189 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1190 spin_unlock_bh(&local->filter_lock);
3ac64bee 1191 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1192}
1193
75636525
JB		 1194/*
1195 * Called when the netdev is removed or, by the code below, before
1196 * the interface type changes.
1197 */
f142c6b9 1198static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1199{
1200 int i;
1201
75636525 1202 /* free extra data */
7907c7d3 1203 ieee80211_free_keys(sdata, false);
75636525 1204
aee14ceb
JM		 1205 ieee80211_debugfs_remove_netdev(sdata);
1206
f0706e82 1207 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1208 __skb_queue_purge(&sdata->fragments[i].skb_list);
1209 sdata->fragment_next = 0;
11a843b7 1210
b9dcf712 1211 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1212 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1213}
1214
f142c6b9
JB		 1215static void ieee80211_uninit(struct net_device *dev)
1216{
1217 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1218}
1219
cf0277e7 1220static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1221 struct sk_buff *skb,
a350ecce 1222 struct net_device *sb_dev)
cf0277e7
JB		 1223{
1224 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1225}
1226
bc1f4470 1227static void
5a490510
JB		 1228ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1229{
1230 int i;
1231
1232 for_each_possible_cpu(i) {
1233 const struct pcpu_sw_netstats *tstats;
1234 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1235 unsigned int start;
1236
1237 tstats = per_cpu_ptr(dev->tstats, i);
1238
1239 do {
1240 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1241 rx_packets = tstats->rx_packets;
1242 tx_packets = tstats->tx_packets;
1243 rx_bytes = tstats->rx_bytes;
1244 tx_bytes = tstats->tx_bytes;
1245 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1246
1247 stats->rx_packets += rx_packets;
1248 stats->tx_packets += tx_packets;
1249 stats->rx_bytes += rx_bytes;
1250 stats->tx_bytes += tx_bytes;
1251 }
5a490510
JB		 1252}
1253
587e729e
JB		 1254static const struct net_device_ops ieee80211_dataif_ops = {
1255 .ndo_open = ieee80211_open,
1256 .ndo_stop = ieee80211_stop,
f142c6b9 1257 .ndo_uninit = ieee80211_uninit,
587e729e 1258 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1259 .ndo_set_rx_mode = ieee80211_set_multicast_list,
47846c9b 1260 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1261 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1262 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1263};
1264
cf0277e7 1265static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1266 struct sk_buff *skb,
a350ecce 1267 struct net_device *sb_dev)
cf0277e7
JB		 1268{
1269 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1270 struct ieee80211_local *local = sdata->local;
cb17ed29 1271 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
cf0277e7 1272 struct ieee80211_hdr *hdr;
cb17ed29 1273 int len_rthdr;
cf0277e7 1274
32c5057b 1275 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1276 return 0;
1277
cb17ed29
MV		 1278 /* reset flags and info before parsing radiotap header */
1279 memset(info, 0, sizeof(*info));
1280
1281 if (!ieee80211_parse_tx_radiotap(skb, dev))
cf0277e7
JB		 1282 return 0; /* doesn't matter, frame will be dropped */
1283
cb17ed29
MV		 1284 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1285 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1286 if (skb->len < len_rthdr + 2 ||
1287 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
1288 return 0; /* doesn't matter, frame will be dropped */
cf0277e7 1289
00e96dec 1290 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1291}
1292
587e729e
JB		 1293static const struct net_device_ops ieee80211_monitorif_ops = {
1294 .ndo_open = ieee80211_open,
1295 .ndo_stop = ieee80211_stop,
f142c6b9 1296 .ndo_uninit = ieee80211_uninit,
587e729e 1297 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1298 .ndo_set_rx_mode = ieee80211_set_multicast_list,
31eba5bc 1299 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1300 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1301 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1302};
1303
50ff477a
JC		 1304static const struct net_device_ops ieee80211_dataif_8023_ops = {
1305 .ndo_open = ieee80211_open,
1306 .ndo_stop = ieee80211_stop,
1307 .ndo_uninit = ieee80211_uninit,
1308 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1309 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1310 .ndo_set_mac_address = ieee80211_change_mac,
1311 .ndo_select_queue = ieee80211_netdev_select_queue,
1312 .ndo_get_stats64 = ieee80211_get_stats64,
1313};
1314
5a490510
JB		 1315static void ieee80211_if_free(struct net_device *dev)
1316{
1317 free_percpu(dev->tstats);
5a490510
JB		 1318}
1319
587e729e
JB		 1320static void ieee80211_if_setup(struct net_device *dev)
1321{
1322 ether_setup(dev);
550fd08c 1323 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1324 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1325 dev->needs_free_netdev = true;
1326 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1327}
1328
80a83cfc
MK		 1329static void ieee80211_if_setup_no_queue(struct net_device *dev)
1330{
1331 ieee80211_if_setup(dev);
1332 dev->priv_flags |= IFF_NO_QUEUE;
1333}
1334
6aea26ce
FF		 1335static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1336{
1337 struct ieee80211_local *local = sdata->local;
1338 struct ieee80211_sub_if_data *bss = sdata;
1339 bool enabled;
1340
1341 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1342 if (!sdata->bss)
1343 return;
1344
1345 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1346 }
1347
1348 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1349 !ieee80211_iftype_supports_encap_offload(bss->vif.type))
1350 return;
1351
1352 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1353 if (sdata->wdev.use_4addr &&
1354 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1355 enabled = false;
1356
1357 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1358 &ieee80211_dataif_ops;
1359}
1360
1fa57d01
JB		 1361static void ieee80211_iface_work(struct work_struct *work)
1362{
1363 struct ieee80211_sub_if_data *sdata =
1364 container_of(work, struct ieee80211_sub_if_data, work);
1365 struct ieee80211_local *local = sdata->local;
1366 struct sk_buff *skb;
344eec67 1367 struct sta_info *sta;
1fa57d01
JB		 1368
1369 if (!ieee80211_sdata_running(sdata))
1370 return;
1371
fc58c47e 1372 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1373 return;
1374
4afaff17 1375 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1376 return;
1377
1378 /* first process frames */
1379 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1380 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1381
699cb58c
JB		 1382 if (ieee80211_is_action(mgmt->frame_control) &&
1383 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1384 int len = skb->len;
bed7ee6e 1385
a93e3644 1386 mutex_lock(&local->sta_mtx);
875ae5f6 1387 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1388 if (sta) {
1389 switch (mgmt->u.action.u.addba_req.action_code) {
1390 case WLAN_ACTION_ADDBA_REQ:
1391 ieee80211_process_addba_request(
1392 local, sta, mgmt, len);
1393 break;
1394 case WLAN_ACTION_ADDBA_RESP:
1395 ieee80211_process_addba_resp(local, sta,
1396 mgmt, len);
1397 break;
1398 case WLAN_ACTION_DELBA:
1399 ieee80211_process_delba(sdata, sta,
1400 mgmt, len);
1401 break;
1402 default:
1403 WARN_ON(1);
1404 break;
1405 }
1406 }
a93e3644 1407 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1408 } else if (ieee80211_is_action(mgmt->frame_control) &&
1409 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1410 switch (mgmt->u.action.u.vht_group_notif.action_code) {
d2941df8
JB		 1411 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1412 struct ieee80211_rx_status *status;
1413 enum nl80211_band band;
1414 u8 opmode;
1415
1416 status = IEEE80211_SKB_RXCB(skb);
1417 band = status->band;
1418 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1419
1420 mutex_lock(&local->sta_mtx);
1421 sta = sta_info_get_bss(sdata, mgmt->sa);
1422
1423 if (sta)
1424 ieee80211_vht_handle_opmode(sdata, sta,
1425 opmode,
1426 band);
1427
1428 mutex_unlock(&local->sta_mtx);
1429 break;
1430 }
23a1f8d4
SS		 1431 case WLAN_VHT_ACTION_GROUPID_MGMT:
1432 ieee80211_process_mu_groups(sdata, mgmt);
1433 break;
1434 default:
1435 WARN_ON(1);
1436 break;
1437 }
344eec67
JB		 1438 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1439 struct ieee80211_hdr *hdr = (void *)mgmt;
1440 /*
1441 * So the frame isn't mgmt, but frame_control
1442 * is at the right place anyway, of course, so
1443 * the if statement is correct.
1444 *
1445 * Warn if we have other data frame types here,
1446 * they must not get here.
1447 */
1448 WARN_ON(hdr->frame_control &
1449 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1450 WARN_ON(!(hdr->seq_ctrl &
1451 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1452 /*
1453 * This was a fragment of a frame, received while
1454 * a block-ack session was active. That cannot be
1455 * right, so terminate the session.
1456 */
a93e3644 1457 mutex_lock(&local->sta_mtx);
875ae5f6 1458 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67 1459 if (sta) {
a1f2ba04 1460 u16 tid = ieee80211_get_tid(hdr);
344eec67
JB		 1461
1462 __ieee80211_stop_rx_ba_session(
1463 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1464 WLAN_REASON_QSTA_REQUIRE_SETUP,
1465 true);
344eec67 1466 }
a93e3644 1467 mutex_unlock(&local->sta_mtx);
bed7ee6e 1468 } else switch (sdata->vif.type) {
1fa57d01
JB		 1469 case NL80211_IFTYPE_STATION:
1470 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1471 break;
1472 case NL80211_IFTYPE_ADHOC:
1473 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1474 break;
1475 case NL80211_IFTYPE_MESH_POINT:
1476 if (!ieee80211_vif_is_mesh(&sdata->vif))
1477 break;
1478 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1479 break;
1480 default:
1481 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1482 break;
1483 }
36b3a628
JB		 1484
1485 kfree_skb(skb);
1fa57d01
JB		 1486 }
1487
1488 /* then other type-dependent work */
1489 switch (sdata->vif.type) {
1490 case NL80211_IFTYPE_STATION:
1491 ieee80211_sta_work(sdata);
1492 break;
1493 case NL80211_IFTYPE_ADHOC:
1494 ieee80211_ibss_work(sdata);
1495 break;
1496 case NL80211_IFTYPE_MESH_POINT:
1497 if (!ieee80211_vif_is_mesh(&sdata->vif))
1498 break;
1499 ieee80211_mesh_work(sdata);
1500 break;
239281f8
RL		 1501 case NL80211_IFTYPE_OCB:
1502 ieee80211_ocb_work(sdata);
1503 break;
1fa57d01
JB		 1504 default:
1505 break;
1506 }
1507}
1508
04ecd257
JB		 1509static void ieee80211_recalc_smps_work(struct work_struct *work)
1510{
1511 struct ieee80211_sub_if_data *sdata =
1512 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1513
1514 ieee80211_recalc_smps(sdata);
1515}
1fa57d01 1516
75636525
JB		 1517/*
1518 * Helper function to initialise an interface to a specific type.
1519 */
1520static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1521 enum nl80211_iftype type)
f0706e82 1522{
239281f8
RL		 1523 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1524 0xff, 0xff, 0xff};
1525
75636525
JB		 1526 /* clear type-dependent union */
1527 memset(&sdata->u, 0, sizeof(sdata->u));
1528
1529 /* and set some type-dependent values */
1530 sdata->vif.type = type;
2ca27bcf 1531 sdata->vif.p2p = false;
60719ffd 1532 sdata->wdev.iftype = type;
75636525 1533
a621fa4d
JB		 1534 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1535 sdata->control_port_no_encrypt = false;
7f3f96ce
MT		 1536 sdata->control_port_over_nl80211 = false;
1537 sdata->control_port_no_preauth = false;
2475b1cc 1538 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1539 sdata->vif.bss_conf.idle = true;
db6d9e9e 1540 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
a621fa4d 1541
b53be792
SW		 1542 sdata->noack_map = 0;
1543
f142c6b9
JB		 1544 /* only monitor/p2p-device differ */
1545 if (sdata->dev) {
1546 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1547 sdata->dev->type = ARPHRD_ETHER;
1548 }
75636525 1549
35f20c14 1550 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1551 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1552 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1553 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1554 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1555 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1556
75636525 1557 switch (type) {
2ca27bcf
JB		 1558 case NL80211_IFTYPE_P2P_GO:
1559 type = NL80211_IFTYPE_AP;
1560 sdata->vif.type = type;
1561 sdata->vif.p2p = true;
fc0561dc 1562 fallthrough;
05c914fe 1563 case NL80211_IFTYPE_AP:
d012a605 1564 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1565 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1566 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1567 break;
2ca27bcf
JB		 1568 case NL80211_IFTYPE_P2P_CLIENT:
1569 type = NL80211_IFTYPE_STATION;
1570 sdata->vif.type = type;
1571 sdata->vif.p2p = true;
fc0561dc 1572 fallthrough;
05c914fe 1573 case NL80211_IFTYPE_STATION:
ad2d223a 1574 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1575 ieee80211_sta_setup_sdata(sdata);
472dbc45 1576 break;
6e0bd6c3 1577 case NL80211_IFTYPE_OCB:
239281f8
RL		 1578 sdata->vif.bss_conf.bssid = bssid_wildcard;
1579 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1580 break;
46900298 1581 case NL80211_IFTYPE_ADHOC:
ad2d223a 1582 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1583 ieee80211_ibss_setup_sdata(sdata);
1584 break;
05c914fe 1585 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1586 if (ieee80211_vif_is_mesh(&sdata->vif))
1587 ieee80211_mesh_init_sdata(sdata);
1588 break;
05c914fe 1589 case NL80211_IFTYPE_MONITOR:
75636525 1590 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1591 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1592 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1593 MONITOR_FLAG_OTHER_BSS;
1594 break;
05c914fe 1595 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1596 sdata->vif.bss_conf.bssid = NULL;
1597 break;
167e33f4
AB		 1598 case NL80211_IFTYPE_NAN:
1599 idr_init(&sdata->u.nan.function_inst_ids);
1600 spin_lock_init(&sdata->u.nan.func_lock);
1601 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1602 break;
05c914fe 1603 case NL80211_IFTYPE_AP_VLAN:
98104fde 1604 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1605 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1606 break;
05c914fe 1607 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1608 case NUM_NL80211_IFTYPES:
c7976f52 1609 WARN_ON(1);
75636525
JB		 1610 break;
1611 }
1612
1613 ieee80211_debugfs_add_netdev(sdata);
1614}
1615
34d4bc4d
JB		 1616static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1617 enum nl80211_iftype type)
1618{
1619 struct ieee80211_local *local = sdata->local;
1620 int ret, err;
2ca27bcf
JB		 1621 enum nl80211_iftype internal_type = type;
1622 bool p2p = false;
34d4bc4d
JB		 1623
1624 ASSERT_RTNL();
1625
1626 if (!local->ops->change_interface)
1627 return -EBUSY;
1628
1629 switch (sdata->vif.type) {
1630 case NL80211_IFTYPE_AP:
1631 case NL80211_IFTYPE_STATION:
1632 case NL80211_IFTYPE_ADHOC:
239281f8 1633 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1634 /*
1635 * Could maybe also all others here?
1636 * Just not sure how that interacts
1637 * with the RX/config path e.g. for
1638 * mesh.
1639 */
1640 break;
1641 default:
1642 return -EBUSY;
1643 }
1644
1645 switch (type) {
1646 case NL80211_IFTYPE_AP:
1647 case NL80211_IFTYPE_STATION:
1648 case NL80211_IFTYPE_ADHOC:
239281f8 1649 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1650 /*
1651 * Could probably support everything
1652 * but WDS here (WDS do_open can fail
1653 * under memory pressure, which this
1654 * code isn't prepared to handle).
1655 */
1656 break;
2ca27bcf
JB		 1657 case NL80211_IFTYPE_P2P_CLIENT:
1658 p2p = true;
1659 internal_type = NL80211_IFTYPE_STATION;
1660 break;
1661 case NL80211_IFTYPE_P2P_GO:
1662 p2p = true;
1663 internal_type = NL80211_IFTYPE_AP;
1664 break;
34d4bc4d
JB		 1665 default:
1666 return -EBUSY;
1667 }
1668
2ca27bcf 1669 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1670 if (ret)
1671 return ret;
1672
1673 ieee80211_do_stop(sdata, false);
1674
f142c6b9 1675 ieee80211_teardown_sdata(sdata);
34d4bc4d 1676
6aea26ce 1677 ieee80211_set_sdata_offload_flags(sdata);
2ca27bcf 1678 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1679 if (ret)
a9865538 1680 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1681
3a25a8c8
JB		 1682 /*
1683 * Ignore return value here, there's not much we can do since
1684 * the driver changed the interface type internally already.
1685 * The warnings will hopefully make driver authors fix it :-)
1686 */
a9865538 1687 ieee80211_check_queues(sdata, type);
3a25a8c8 1688
34d4bc4d 1689 ieee80211_setup_sdata(sdata, type);
6aea26ce 1690 ieee80211_set_vif_encap_ops(sdata);
34d4bc4d 1691
f142c6b9 1692 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1693 WARN(err, "type change: do_open returned %d", err);
1694
1695 return ret;
1696}
1697
f3947e2d 1698int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1699 enum nl80211_iftype type)
75636525 1700{
34d4bc4d
JB		 1701 int ret;
1702
f3947e2d
JB		 1703 ASSERT_RTNL();
1704
2ca27bcf 1705 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1706 return 0;
1707
34d4bc4d
JB		 1708 if (ieee80211_sdata_running(sdata)) {
1709 ret = ieee80211_runtime_change_iftype(sdata, type);
1710 if (ret)
1711 return ret;
1712 } else {
1713 /* Purge and reset type-dependent state. */
f142c6b9 1714 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1715 ieee80211_setup_sdata(sdata, type);
1716 }
75636525
JB		 1717
1718 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1719 if (type == NL80211_IFTYPE_STATION)
1720 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1721
1722 return 0;
f0706e82
JB		 1723}
1724
fa9029f8 1725static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1726 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1727{
1728 struct ieee80211_sub_if_data *sdata;
1729 u64 mask, start, addr, val, inc;
1730 u8 *m;
1731 u8 tmp_addr[ETH_ALEN];
1732 int i;
1733
1734 /* default ... something at least */
f142c6b9 1735 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1736
1737 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1738 local->hw.wiphy->n_addresses <= 1)
1739 return;
1740
fa9029f8
JB		 1741 mutex_lock(&local->iflist_mtx);
1742
1743 switch (type) {
1744 case NL80211_IFTYPE_MONITOR:
1745 /* doesn't matter */
1746 break;
1747 case NL80211_IFTYPE_WDS:
1748 case NL80211_IFTYPE_AP_VLAN:
1749 /* match up with an AP interface */
1750 list_for_each_entry(sdata, &local->interfaces, list) {
1751 if (sdata->vif.type != NL80211_IFTYPE_AP)
1752 continue;
f142c6b9 1753 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1754 break;
1755 }
1756 /* keep default if no AP interface present */
1757 break;
6d71117a
JB		 1758 case NL80211_IFTYPE_P2P_CLIENT:
1759 case NL80211_IFTYPE_P2P_GO:
30686bf7 1760 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1761 list_for_each_entry(sdata, &local->interfaces, list) {
1762 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1763 continue;
1764 if (!ieee80211_sdata_running(sdata))
1765 continue;
1766 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1767 goto out_unlock;
1768 }
1769 }
fc0561dc 1770 fallthrough;
fa9029f8
JB		 1771 default:
1772 /* assign a new address if possible -- try n_addresses first */
1773 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1774 bool used = false;
1775
1776 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1777 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1778 sdata->vif.addr)) {
fa9029f8
JB		 1779 used = true;
1780 break;
1781 }
1782 }
1783
1784 if (!used) {
f142c6b9 1785 memcpy(perm_addr,
fa9029f8
JB		 1786 local->hw.wiphy->addresses[i].addr,
1787 ETH_ALEN);
1788 break;
1789 }
1790 }
1791
1792 /* try mask if available */
1793 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1794 break;
1795
1796 m = local->hw.wiphy->addr_mask;
1797 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1798 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1799 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1800
1801 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1802 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1803 pr_info("not contiguous\n");
fa9029f8
JB		 1804 break;
1805 }
1806
ac20976d
HS		 1807 /*
1808 * Pick address of existing interface in case user changed
1809 * MAC address manually, default to perm_addr.
1810 */
fa9029f8 1811 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1812 list_for_each_entry(sdata, &local->interfaces, list) {
1813 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1814 continue;
1815 m = sdata->vif.addr;
1816 break;
1817 }
fa9029f8
JB		 1818 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1819 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1820 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1821
1822 inc = 1ULL<<__ffs64(mask);
1823 val = (start & mask);
1824 addr = (start & ~mask) | (val & mask);
1825 do {
1826 bool used = false;
1827
1828 tmp_addr[5] = addr >> 0*8;
1829 tmp_addr[4] = addr >> 1*8;
1830 tmp_addr[3] = addr >> 2*8;
1831 tmp_addr[2] = addr >> 3*8;
1832 tmp_addr[1] = addr >> 4*8;
1833 tmp_addr[0] = addr >> 5*8;
1834
1835 val += inc;
1836
1837 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1838 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1839 used = true;
1840 break;
1841 }
1842 }
1843
1844 if (!used) {
f142c6b9 1845 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1846 break;
1847 }
1848 addr = (start & ~mask) | (val & mask);
1849 } while (addr != start);
1850
1851 break;
1852 }
1853
6d71117a 1854 out_unlock:
fa9029f8
JB		 1855 mutex_unlock(&local->iflist_mtx);
1856}
1857
3e122be0 1858int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1859 unsigned char name_assign_type,
84efbb84 1860 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1861 struct vif_params *params)
f0706e82 1862{
f142c6b9 1863 struct net_device *ndev = NULL;
f0706e82 1864 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1865 struct txq_info *txqi;
80a83cfc 1866 void (*if_setup)(struct net_device *dev);
75636525 1867 int ret, i;
ded81f6b 1868 int txqs = 1;
f0706e82
JB		 1869
1870 ASSERT_RTNL();
75636525 1871
708d50ed 1872 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1873 struct wireless_dev *wdev;
1874
1875 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1876 GFP_KERNEL);
1877 if (!sdata)
1878 return -ENOMEM;
1879 wdev = &sdata->wdev;
1880
1881 sdata->dev = NULL;
1882 strlcpy(sdata->name, name, IFNAMSIZ);
1883 ieee80211_assign_perm_addr(local, wdev->address, type);
1884 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1885 } else {
ba8c3d6f
FF		 1886 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1887 sizeof(void *));
1888 int txq_size = 0;
1889
79af1f86
JB		 1890 if (local->ops->wake_tx_queue &&
1891 type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 1892 (type != NL80211_IFTYPE_MONITOR ||
1893 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 1894 txq_size += sizeof(struct txq_info) +
1895 local->hw.txq_data_size;
1896
dbd50a85 1897 if (local->ops->wake_tx_queue) {
80a83cfc 1898 if_setup = ieee80211_if_setup_no_queue;
dbd50a85 1899 } else {
80a83cfc 1900 if_setup = ieee80211_if_setup;
dbd50a85
JB		 1901 if (local->hw.queues >= IEEE80211_NUM_ACS)
1902 txqs = IEEE80211_NUM_ACS;
1903 }
f142c6b9 1904
ba8c3d6f 1905 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1906 name, name_assign_type,
80a83cfc 1907 if_setup, txqs, 1);
f142c6b9
JB		 1908 if (!ndev)
1909 return -ENOMEM;
1f6e0baa
JC		 1910
1911 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1912 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1913
f142c6b9
JB		 1914 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1915
5a490510
JB		 1916 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1917 if (!ndev->tstats) {
1918 free_netdev(ndev);
1919 return -ENOMEM;
1920 }
1921
f142c6b9
JB		 1922 ndev->needed_headroom = local->tx_headroom +
1923 4*6 /* four MAC addresses */
1924 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1925 + 6 /* mesh */
1926 + 8 /* rfc1042/bridge tunnel */
1927 - ETH_HLEN /* ethernet hard_header_len */
1928 + IEEE80211_ENCRYPT_HEADROOM;
1929 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1930
1931 ret = dev_alloc_name(ndev, ndev->name);
1932 if (ret < 0) {
e6436be2 1933 ieee80211_if_free(ndev);
c7a61cba 1934 free_netdev(ndev);
f142c6b9
JB		 1935 return ret;
1936 }
1937
1938 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 1939 if (is_valid_ether_addr(params->macaddr))
b5dfae02
BG		 1940 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1941 else
1942 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1943 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1944
1945 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1946 sdata = netdev_priv(ndev);
1947 ndev->ieee80211_ptr = &sdata->wdev;
1948 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1949 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1950
ba8c3d6f
FF		 1951 if (txq_size) {
1952 txqi = netdev_priv(ndev) + size;
fa962b92 1953 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1954 }
1955
f142c6b9
JB		 1956 sdata->dev = ndev;
1957 }
75636525
JB		 1958
1959 /* initialise type-independent data */
f0706e82 1960 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1961 sdata->local = local;
75636525
JB		 1962
1963 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1964 skb_queue_head_init(&sdata->fragments[i].skb_list);
1965
1966 INIT_LIST_HEAD(&sdata->key_list);
1967
164eb02d
SW		 1968 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1969 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1970 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1971 ieee80211_delayed_tailroom_dec);
97f97b1f 1972
57fbcce3 1973 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1974 struct ieee80211_supported_band *sband;
1975 sband = local->hw.wiphy->bands[i];
1976 sdata->rc_rateidx_mask[i] =
1977 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1978 if (sband) {
1979 __le16 cap;
1980 u16 *vht_rate_mask;
1981
19468413
SW		 1982 memcpy(sdata->rc_rateidx_mcs_mask[i],
1983 sband->ht_cap.mcs.rx_mask,
1984 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1985
1986 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1987 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1988 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1989 } else {
19468413
SW		 1990 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1991 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1992 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1993 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1994 }
37eb0b16 1995 }
75636525 1996
3a25a8c8
JB		 1997 ieee80211_set_default_queues(sdata);
1998
1ea6f9c0
JB		 1999 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2000 sdata->user_power_level = local->user_power_level;
2001
2475b1cc
MS		 2002 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2003
75636525
JB		 2004 /* setup type-dependent data */
2005 ieee80211_setup_sdata(sdata, type);
f0706e82 2006
f142c6b9 2007 if (ndev) {
dd665d23
JB		 2008 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2009 if (type == NL80211_IFTYPE_STATION)
2010 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 2011
f142c6b9 2012 ndev->features |= local->hw.netdev_features;
07b83d2e
JB		 2013 ndev->hw_features |= ndev->features &
2014 MAC80211_SUPPORTED_FEATURES_TX;
72d78728 2015
b7ffbd7e
JB		 2016 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2017
9c22b4a3
JW		 2018 /* MTU range: 256 - 2304 */
2019 ndev->min_mtu = 256;
06354665 2020 ndev->max_mtu = local->hw.max_mtu;
9c22b4a3 2021
f142c6b9
JB		 2022 ret = register_netdevice(ndev);
2023 if (ret) {
cf124db5 2024 free_netdev(ndev);
f142c6b9
JB		 2025 return ret;
2026 }
2027 }
f0706e82 2028
c771c9d8 2029 mutex_lock(&local->iflist_mtx);
79010420 2030 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 2031 mutex_unlock(&local->iflist_mtx);
79010420 2032
84efbb84
JB		 2033 if (new_wdev)
2034 *new_wdev = &sdata->wdev;
f0706e82 2035
f0706e82 2036 return 0;
f0706e82
JB		 2037}
2038
f698d856 2039void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 2040{
f0706e82 2041 ASSERT_RTNL();
11a843b7 2042
c771c9d8 2043 mutex_lock(&sdata->local->iflist_mtx);
75636525 2044 list_del_rcu(&sdata->list);
c771c9d8
JB		 2045 mutex_unlock(&sdata->local->iflist_mtx);
2046
f1267cf3
BP		 2047 if (sdata->vif.txq)
2048 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2049
75636525 2050 synchronize_rcu();
f142c6b9
JB		 2051
2052 if (sdata->dev) {
2053 unregister_netdevice(sdata->dev);
2054 } else {
2055 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 2056 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 2057 kfree(sdata);
2058 }
2059}
2060
2061void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2062{
2063 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2064 return;
2065 ieee80211_do_stop(sdata, true);
f0706e82
JB		 2066}
2067
75636525 2068void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 2069{
75636525 2070 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 2071 LIST_HEAD(unreg_list);
f142c6b9 2072 LIST_HEAD(wdev_list);
f0706e82
JB		 2073
2074 ASSERT_RTNL();
2075
d8d9008c
JB		 2076 /* Before destroying the interfaces, make sure they're all stopped so
2077 * that the hardware is stopped. Otherwise, the driver might still be
2078 * iterating the interfaces during the shutdown, e.g. from a worker
2079 * or from RX processing or similar, and if it does so (using atomic
2080 * iteration) while we're manipulating the list, the iteration will
2081 * crash.
2082 *
2083 * After this, the hardware should be stopped and the driver should
2084 * have stopped all of its activities, so that we can do RCU-unaware
2085 * manipulations of the interface list below.
c8aa22db 2086 */
d8d9008c
JB		 2087 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2088
2089 WARN(local->open_count, "%s: open count remains %d\n",
2090 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 2091
a50e5fb8
SS		 2092 ieee80211_txq_teardown_flows(local);
2093
efe117ab 2094 mutex_lock(&local->iflist_mtx);
75636525
JB		 2095 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2096 list_del(&sdata->list);
c771c9d8 2097
f142c6b9
JB		 2098 if (sdata->dev)
2099 unregister_netdevice_queue(sdata->dev, &unreg_list);
2100 else
2101 list_add(&sdata->list, &wdev_list);
f0706e82 2102 }
efe117ab
ED		 2103 mutex_unlock(&local->iflist_mtx);
2104 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 2105
2106 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2107 list_del(&sdata->list);
2108 cfg80211_unregister_wdev(&sdata->wdev);
2109 kfree(sdata);
2110 }
f0706e82 2111}
5cff20e6 2112
47846c9b 2113static int netdev_notify(struct notifier_block *nb,
351638e7 2114 unsigned long state, void *ptr)
47846c9b 2115{
351638e7 2116 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 2117 struct ieee80211_sub_if_data *sdata;
2118
2119 if (state != NETDEV_CHANGENAME)
8bd811aa 2120 return NOTIFY_DONE;
47846c9b
JB		 2121
2122 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 2123 return NOTIFY_DONE;
47846c9b
JB		 2124
2125 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2126 return NOTIFY_DONE;
47846c9b
JB		 2127
2128 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2129 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2130 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2131
2132 return NOTIFY_OK;
47846c9b
JB		 2133}
2134
2135static struct notifier_block mac80211_netdev_notifier = {
2136 .notifier_call = netdev_notify,
2137};
2138
2139int ieee80211_iface_init(void)
2140{
2141 return register_netdevice_notifier(&mac80211_netdev_notifier);
2142}
2143
2144void ieee80211_iface_exit(void)
2145{
2146 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2147}
72f15d53
MB		 2148
2149void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2150{
2151 if (sdata->vif.type == NL80211_IFTYPE_AP)
2152 atomic_inc(&sdata->u.ap.num_mcast_sta);
2153 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2154 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2155}
2156
2157void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2158{
2159 if (sdata->vif.type == NL80211_IFTYPE_AP)
2160 atomic_dec(&sdata->u.ap.num_mcast_sta);
2161 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2162 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2163}
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