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Merge tag 'slab-fix-for-6.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / net / mac80211 / iface.c
CommitLineData
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
23a5f0af 11 * Copyright (C) 2018-2022 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();
d0a9123e 54 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1ea6f9c0
JB		 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
bfd8403a
JB		 63 if (sdata->deflink.user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->deflink.user_power_level);
1ea6f9c0 65
bfd8403a
JB		 66 if (sdata->deflink.ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->deflink.ap_power_level);
1ea6f9c0
JB		 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)))
d8675a63 83 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
7b7090b4 84 BSS_CHANGED_TXPOWER);
1ea6f9c0 85}
c771c9d8 86
62a40a15 87static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 88{
89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
90 return 0;
91
92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
93 return IEEE80211_CONF_CHANGE_IDLE;
94}
95
62a40a15 96static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 97{
98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
99 return 0;
100
3b24f4c6 101 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 102
103 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
104 return IEEE80211_CONF_CHANGE_IDLE;
105}
106
62a40a15
JB		 107static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
108 bool force_active)
cc45ae54 109{
1d5e1266 110 bool working, scanning, active;
cc45ae54 111 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 112
cc45ae54
JB		 113 lockdep_assert_held(&local->mtx);
114
62a40a15
JB		 115 active = force_active ||
116 !list_empty(&local->chanctx_list) ||
117 local->monitors;
cc45ae54 118
1d5e1266
JB		 119 working = !local->ops->remain_on_channel &&
120 !list_empty(&local->roc_list);
cc45ae54 121
f1e3e051
JB		 122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 124
cc45ae54
JB		 125 if (working || scanning)
126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 else
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
129
fd0f979a 130 if (active)
cc45ae54
JB		 131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 else
133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134
135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136
fd0f979a 137 if (working || scanning || active)
62a40a15
JB		 138 return __ieee80211_idle_off(local);
139 return __ieee80211_idle_on(local);
140}
141
142u32 ieee80211_idle_off(struct ieee80211_local *local)
143{
144 return __ieee80211_recalc_idle(local, true);
145}
146
147void ieee80211_recalc_idle(struct ieee80211_local *local)
148{
149 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 150 if (change)
151 ieee80211_hw_config(local, change);
cc45ae54
JB		 152}
153
3899ba90 154static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 155 bool check_dup)
478622e8 156{
ac20976d
HS		 157 struct ieee80211_local *local = sdata->local;
158 struct ieee80211_sub_if_data *iter;
478622e8
HS		 159 u64 new, mask, tmp;
160 u8 *m;
161 int ret = 0;
162
163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
164 return 0;
165
166 m = addr;
167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170
171 m = local->hw.wiphy->addr_mask;
172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
31eba5bc
FF		 176 if (!check_dup)
177 return ret;
478622e8
HS		 178
179 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 180 list_for_each_entry(iter, &local->interfaces, list) {
181 if (iter == sdata)
478622e8
HS		 182 continue;
183
3899ba90 184 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 186 continue;
187
ac20976d 188 m = iter->vif.addr;
478622e8
HS		 189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192
193 if ((new & ~mask) != (tmp & ~mask)) {
194 ret = -EINVAL;
195 break;
196 }
197 }
198 mutex_unlock(&local->iflist_mtx);
199
200 return ret;
201}
202
3c06e91b
JP		 203static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
204{
205 struct ieee80211_roc_work *roc;
206 struct ieee80211_local *local = sdata->local;
207 struct ieee80211_sub_if_data *scan_sdata;
208 int ret = 0;
209
210 /* To be the most flexible here we want to only limit changing the
211 * address if the specific interface is doing offchannel work or
212 * scanning.
213 */
214 if (netif_carrier_ok(sdata->dev))
215 return -EBUSY;
216
217 mutex_lock(&local->mtx);
218
219 /* First check no ROC work is happening on this iface */
220 list_for_each_entry(roc, &local->roc_list, list) {
221 if (roc->sdata != sdata)
222 continue;
223
224 if (roc->started) {
225 ret = -EBUSY;
226 goto unlock;
227 }
228 }
229
230 /* And if this iface is scanning */
231 if (local->scanning) {
232 scan_sdata = rcu_dereference_protected(local->scan_sdata,
233 lockdep_is_held(&local->mtx));
234 if (sdata == scan_sdata)
235 ret = -EBUSY;
236 }
237
238 switch (sdata->vif.type) {
239 case NL80211_IFTYPE_STATION:
240 case NL80211_IFTYPE_P2P_CLIENT:
241 /* More interface types could be added here but changing the
242 * address while powered makes the most sense in client modes.
243 */
244 break;
245 default:
ceb3d688 246 ret = -EOPNOTSUPP;
3c06e91b
JP		 247 }
248
249unlock:
250 mutex_unlock(&local->mtx);
251 return ret;
252}
253
47846c9b
JB		 254static int ieee80211_change_mac(struct net_device *dev, void *addr)
255{
256 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3c06e91b 257 struct ieee80211_local *local = sdata->local;
fc5f7577 258 struct sockaddr *sa = addr;
31eba5bc 259 bool check_dup = true;
3c06e91b 260 bool live = false;
47846c9b
JB		 261 int ret;
262
3c06e91b
JP		 263 if (ieee80211_sdata_running(sdata)) {
264 ret = ieee80211_can_powered_addr_change(sdata);
265 if (ret)
266 return ret;
267
268 live = true;
269 }
47846c9b 270
31eba5bc 271 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 272 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 273 check_dup = false;
274
3899ba90 275 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 276 if (ret)
277 return ret;
278
3c06e91b
JP		 279 if (live)
280 drv_remove_interface(local, sdata);
fc5f7577 281 ret = eth_mac_addr(dev, sa);
47846c9b 282
d8787ec6 283 if (ret == 0) {
fc5f7577 284 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
d8787ec6
JB		 285 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
286 }
47846c9b 287
3c06e91b
JP		 288 /* Regardless of eth_mac_addr() return we still want to add the
289 * interface back. This should not fail...
290 */
291 if (live)
292 WARN_ON(drv_add_interface(local, sdata));
293
47846c9b
JB		 294 return ret;
295}
296
0d143fe1
JB		 297static inline int identical_mac_addr_allowed(int type1, int type2)
298{
299 return type1 == NL80211_IFTYPE_MONITOR ||
300 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 301 type1 == NL80211_IFTYPE_P2P_DEVICE ||
302 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 303 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
304 (type1 == NL80211_IFTYPE_AP_VLAN &&
305 (type2 == NL80211_IFTYPE_AP ||
306 type2 == NL80211_IFTYPE_AP_VLAN));
307}
308
87490f6d
JB		 309static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
310 enum nl80211_iftype iftype)
0d143fe1 311{
b4a4bf5d 312 struct ieee80211_local *local = sdata->local;
87490f6d 313 struct ieee80211_sub_if_data *nsdata;
b6a55015 314 int ret;
0d143fe1 315
87490f6d 316 ASSERT_RTNL();
0d143fe1
JB		 317
318 /* we hold the RTNL here so can safely walk the list */
319 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 320 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 321 /*
322 * Only OCB and monitor mode may coexist
323 */
324 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
325 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
326 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
327 nsdata->vif.type == NL80211_IFTYPE_OCB))
328 return -EBUSY;
329
0d143fe1
JB		 330 /*
331 * Allow only a single IBSS interface to be up at any
332 * time. This is restricted because beacon distribution
333 * cannot work properly if both are in the same IBSS.
334 *
335 * To remove this restriction we'd have to disallow them
336 * from setting the same SSID on different IBSS interfaces
337 * belonging to the same hardware. Then, however, we're
338 * faced with having to adopt two different TSF timers...
339 */
87490f6d 340 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 341 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
342 return -EBUSY;
73da7d5b
SW		 343 /*
344 * will not add another interface while any channel
345 * switch is active.
346 */
d0a9123e 347 if (nsdata->vif.bss_conf.csa_active)
73da7d5b 348 return -EBUSY;
0d143fe1
JB		 349
350 /*
351 * The remaining checks are only performed for interfaces
352 * with the same MAC address.
353 */
371a255e
JB		 354 if (!ether_addr_equal(sdata->vif.addr,
355 nsdata->vif.addr))
0d143fe1
JB		 356 continue;
357
358 /*
359 * check whether it may have the same address
360 */
87490f6d 361 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 362 nsdata->vif.type))
363 return -ENOTUNIQ;
364
ae960ee9
JB		 365 /* No support for VLAN with MLO yet */
366 if (iftype == NL80211_IFTYPE_AP_VLAN &&
f216033d
FF		 367 sdata->wdev.use_4addr &&
368 nsdata->vif.type == NL80211_IFTYPE_AP &&
369 nsdata->vif.valid_links)
ae960ee9
JB		 370 return -EOPNOTSUPP;
371
0d143fe1
JB		 372 /*
373 * can only add VLANs to enabled APs
374 */
87490f6d 375 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 376 nsdata->vif.type == NL80211_IFTYPE_AP)
377 sdata->bss = &nsdata->u.ap;
378 }
379 }
380
b6a55015
LC		 381 mutex_lock(&local->chanctx_mtx);
382 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
383 mutex_unlock(&local->chanctx_mtx);
384 return ret;
87490f6d
JB		 385}
386
a9865538
JB		 387static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
388 enum nl80211_iftype iftype)
3a25a8c8
JB		 389{
390 int n_queues = sdata->local->hw.queues;
391 int i;
392
708d50ed
AB		 393 if (iftype == NL80211_IFTYPE_NAN)
394 return 0;
395
a9865538 396 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 397 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
398 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
399 IEEE80211_INVAL_HW_QUEUE))
400 return -EINVAL;
401 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
402 n_queues))
403 return -EINVAL;
404 }
3a25a8c8
JB		 405 }
406
a9865538
JB		 407 if ((iftype != NL80211_IFTYPE_AP &&
408 iftype != NL80211_IFTYPE_P2P_GO &&
409 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 410 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 411 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
412 return 0;
413 }
414
415 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
416 return -EINVAL;
417
418 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
419 return -EINVAL;
420
421 return 0;
422}
423
4b7afb52 424static int ieee80211_open(struct net_device *dev)
6aea26ce 425{
4b7afb52
FF		 426 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
427 int err;
428
429 /* fail early if user set an invalid address */
430 if (!is_valid_ether_addr(dev->dev_addr))
431 return -EADDRNOTAVAIL;
432
433 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
434 if (err)
435 return err;
436
a05829a7
JB		 437 wiphy_lock(sdata->local->hw.wiphy);
438 err = ieee80211_do_open(&sdata->wdev, true);
439 wiphy_unlock(sdata->local->hw.wiphy);
440
441 return err;
6aea26ce
FF		 442}
443
a05829a7 444static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
6aea26ce
FF		 445{
446 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 447 unsigned long flags;
448 struct sk_buff *skb, *tmp;
449 u32 hw_reconf_flags = 0;
450 int i, flushed;
451 struct ps_data *ps;
452 struct cfg80211_chan_def chandef;
453 bool cancel_scan;
454 struct cfg80211_nan_func *func;
6aea26ce 455
4b7afb52 456 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
3598cb6e 457 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
6aea26ce 458
4b7afb52
FF		 459 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
460 if (cancel_scan)
461 ieee80211_scan_cancel(local);
6aea26ce 462
4b7afb52 463 ieee80211_roc_purge(local, sdata);
6aea26ce 464
4b7afb52
FF		 465 switch (sdata->vif.type) {
466 case NL80211_IFTYPE_STATION:
467 ieee80211_mgd_stop(sdata);
468 break;
469 case NL80211_IFTYPE_ADHOC:
470 ieee80211_ibss_stop(sdata);
471 break;
472 case NL80211_IFTYPE_MONITOR:
473 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
474 break;
475 list_del_rcu(&sdata->u.mntr.list);
476 break;
477 default:
478 break;
479 }
6aea26ce 480
4b7afb52
FF		 481 /*
482 * Remove all stations associated with this interface.
483 *
484 * This must be done before calling ops->remove_interface()
485 * because otherwise we can later invoke ops->sta_notify()
486 * whenever the STAs are removed, and that invalidates driver
487 * assumptions about always getting a vif pointer that is valid
488 * (because if we remove a STA after ops->remove_interface()
489 * the driver will have removed the vif info already!)
490 *
70d9c599 491 * For AP_VLANs stations may exist since there's nothing else that
4b7afb52
FF		 492 * would have removed them, but in other modes there shouldn't
493 * be any stations.
494 */
495 flushed = sta_info_flush(sdata);
70d9c599 496 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
6aea26ce 497
4b7afb52
FF		 498 /* don't count this interface for allmulti while it is down */
499 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
500 atomic_dec(&local->iff_allmultis);
6aea26ce 501
4b7afb52
FF		 502 if (sdata->vif.type == NL80211_IFTYPE_AP) {
503 local->fif_pspoll--;
504 local->fif_probe_req--;
505 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
506 local->fif_probe_req--;
6aea26ce
FF		 507 }
508
4b7afb52
FF		 509 if (sdata->dev) {
510 netif_addr_lock_bh(sdata->dev);
511 spin_lock_bh(&local->filter_lock);
512 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
513 sdata->dev->addr_len);
514 spin_unlock_bh(&local->filter_lock);
515 netif_addr_unlock_bh(sdata->dev);
6aea26ce 516 }
6aea26ce 517
4b7afb52
FF		 518 del_timer_sync(&local->dynamic_ps_timer);
519 cancel_work_sync(&local->dynamic_ps_enable_work);
6aea26ce 520
4b7afb52 521 cancel_work_sync(&sdata->recalc_smps);
d8787ec6 522
4b7afb52 523 sdata_lock(sdata);
d8787ec6
JB		 524 WARN(sdata->vif.valid_links,
525 "destroying interface with valid links 0x%04x\n",
526 sdata->vif.valid_links);
527
4b7afb52 528 mutex_lock(&local->mtx);
d0a9123e 529 sdata->vif.bss_conf.csa_active = false;
4b7afb52 530 if (sdata->vif.type == NL80211_IFTYPE_STATION)
bfd8403a
JB		 531 sdata->deflink.u.mgd.csa_waiting_bcn = false;
532 if (sdata->deflink.csa_block_tx) {
4b7afb52
FF		 533 ieee80211_wake_vif_queues(local, sdata,
534 IEEE80211_QUEUE_STOP_REASON_CSA);
bfd8403a 535 sdata->deflink.csa_block_tx = false;
6aea26ce 536 }
4b7afb52
FF		 537 mutex_unlock(&local->mtx);
538 sdata_unlock(sdata);
6aea26ce 539
bfd8403a
JB		 540 cancel_work_sync(&sdata->deflink.csa_finalize_work);
541 cancel_work_sync(&sdata->deflink.color_change_finalize_work);
85416a4f 542
bfd8403a 543 cancel_delayed_work_sync(&sdata->deflink.dfs_cac_timer_work);
85416a4f 544
4b7afb52
FF		 545 if (sdata->wdev.cac_started) {
546 chandef = sdata->vif.bss_conf.chandef;
547 WARN_ON(local->suspended);
548 mutex_lock(&local->mtx);
d8675a63 549 ieee80211_link_release_channel(&sdata->deflink);
4b7afb52
FF		 550 mutex_unlock(&local->mtx);
551 cfg80211_cac_event(sdata->dev, &chandef,
552 NL80211_RADAR_CAC_ABORTED,
553 GFP_KERNEL);
554 }
85416a4f 555
4b7afb52 556 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4b7afb52
FF		 557 WARN_ON(!list_empty(&sdata->u.ap.vlans));
558 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
559 /* remove all packets in parent bc_buf pointing to this dev */
560 ps = &sdata->bss->ps;
3a25a8c8 561
4b7afb52
FF		 562 spin_lock_irqsave(&ps->bc_buf.lock, flags);
563 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
564 if (skb->dev == sdata->dev) {
565 __skb_unlink(skb, &ps->bc_buf);
566 local->total_ps_buffered--;
567 ieee80211_free_txskb(&local->hw, skb);
568 }
569 }
570 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
3a25a8c8 571 }
3a25a8c8 572
4b7afb52
FF		 573 if (going_down)
574 local->open_count--;
4b6f1dd6 575
4b7afb52
FF		 576 switch (sdata->vif.type) {
577 case NL80211_IFTYPE_AP_VLAN:
578 mutex_lock(&local->mtx);
579 list_del(&sdata->u.vlan.list);
580 mutex_unlock(&local->mtx);
d0a9123e 581 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
4b7afb52
FF		 582 /* see comment in the default case below */
583 ieee80211_free_keys(sdata, true);
584 /* no need to tell driver */
585 break;
586 case NL80211_IFTYPE_MONITOR:
587 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
588 local->cooked_mntrs--;
589 break;
590 }
685fb72b 591
4b7afb52
FF		 592 local->monitors--;
593 if (local->monitors == 0) {
594 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
595 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
596 }
4b6f1dd6 597
4b7afb52
FF		 598 ieee80211_adjust_monitor_flags(sdata, -1);
599 break;
600 case NL80211_IFTYPE_NAN:
601 /* clean all the functions */
602 spin_lock_bh(&sdata->u.nan.func_lock);
4b6f1dd6 603
4b7afb52
FF		 604 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
605 idr_remove(&sdata->u.nan.function_inst_ids, i);
606 cfg80211_free_nan_func(func);
607 }
608 idr_destroy(&sdata->u.nan.function_inst_ids);
3a25a8c8 609
4b7afb52
FF		 610 spin_unlock_bh(&sdata->u.nan.func_lock);
611 break;
612 case NL80211_IFTYPE_P2P_DEVICE:
613 /* relies on synchronize_rcu() below */
614 RCU_INIT_POINTER(local->p2p_sdata, NULL);
615 fallthrough;
616 default:
617 cancel_work_sync(&sdata->work);
618 /*
619 * When we get here, the interface is marked down.
620 * Free the remaining keys, if there are any
621 * (which can happen in AP mode if userspace sets
70d9c599 622 * keys before the interface is operating)
4b7afb52
FF		 623 *
624 * Force the key freeing to always synchronize_net()
625 * to wait for the RX path in case it is using this
626 * interface enqueuing frames at this very time on
627 * another CPU.
628 */
629 ieee80211_free_keys(sdata, true);
630 skb_queue_purge(&sdata->skb_queue);
f5a4c24e 631 skb_queue_purge(&sdata->status_queue);
4b6f1dd6
JB		 632 }
633
4b7afb52
FF		 634 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
635 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
636 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
637 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
638 if (info->control.vif == &sdata->vif) {
639 __skb_unlink(skb, &local->pending[i]);
640 ieee80211_free_txskb(&local->hw, skb);
641 }
642 }
3a25a8c8 643 }
4b7afb52 644 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
3a25a8c8 645
4b7afb52
FF		 646 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
647 ieee80211_txq_remove_vlan(local, sdata);
fab57a6c 648
4b7afb52
FF		 649 sdata->bss = NULL;
650
651 if (local->open_count == 0)
652 ieee80211_clear_tx_pending(local);
653
654 sdata->vif.bss_conf.beacon_int = 0;
655
656 /*
657 * If the interface goes down while suspended, presumably because
658 * the device was unplugged and that happens before our resume,
659 * then the driver is already unconfigured and the remainder of
660 * this function isn't needed.
661 * XXX: what about WoWLAN? If the device has software state, e.g.
662 * memory allocated, it might expect teardown commands from
663 * mac80211 here?
664 */
665 if (local->suspended) {
666 WARN_ON(local->wowlan);
6dd23603 667 WARN_ON(rcu_access_pointer(local->monitor_sdata));
4b7afb52 668 return;
55de908a
JB		 669 }
670
4b7afb52
FF		 671 switch (sdata->vif.type) {
672 case NL80211_IFTYPE_AP_VLAN:
673 break;
674 case NL80211_IFTYPE_MONITOR:
675 if (local->monitors == 0)
676 ieee80211_del_virtual_monitor(local);
42bd20d9 677
4b7afb52
FF		 678 mutex_lock(&local->mtx);
679 ieee80211_recalc_idle(local);
680 mutex_unlock(&local->mtx);
4b6f1dd6 681
4b7afb52
FF		 682 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
683 break;
4b6f1dd6 684
4b7afb52
FF		 685 fallthrough;
686 default:
687 if (going_down)
688 drv_remove_interface(local, sdata);
689 }
4b6f1dd6 690
4b7afb52 691 ieee80211_recalc_ps(local);
8b305780 692
4b7afb52
FF		 693 if (cancel_scan)
694 flush_delayed_work(&local->scan_work);
4b6f1dd6 695
4b7afb52
FF		 696 if (local->open_count == 0) {
697 ieee80211_stop_device(local);
698
699 /* no reconfiguring after stop! */
8b305780
JB		 700 return;
701 }
4b6f1dd6 702
4b7afb52
FF		 703 /* do after stop to avoid reconfiguring when we stop anyway */
704 ieee80211_configure_filter(local);
705 ieee80211_hw_config(local, hw_reconf_flags);
8b305780 706
4b7afb52
FF		 707 if (local->monitors == local->open_count)
708 ieee80211_add_virtual_monitor(local);
709}
4b6f1dd6 710
17196425
JC		 711static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
712{
713 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
714 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
715
716 if (!tx_vif)
717 return;
718
719 tx_sdata = vif_to_sdata(tx_vif);
720 sdata->vif.mbssid_tx_vif = NULL;
721
722 list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
723 &tx_sdata->local->interfaces, list) {
724 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
725 non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
726 ieee80211_sdata_running(non_tx_sdata)) {
727 non_tx_sdata->vif.mbssid_tx_vif = NULL;
728 dev_close(non_tx_sdata->wdev.netdev);
729 }
730 }
731
732 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
733 tx_sdata->vif.mbssid_tx_vif = NULL;
734 dev_close(tx_sdata->wdev.netdev);
735 }
736}
737
4b7afb52
FF		 738static int ieee80211_stop(struct net_device *dev)
739{
740 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
55de908a 741
17196425 742 /* close dependent VLAN and MBSSID interfaces before locking wiphy */
d5befb22
JB		 743 if (sdata->vif.type == NL80211_IFTYPE_AP) {
744 struct ieee80211_sub_if_data *vlan, *tmpsdata;
745
746 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
747 u.vlan.list)
748 dev_close(vlan->dev);
17196425
JC		 749
750 ieee80211_stop_mbssid(sdata);
d5befb22
JB		 751 }
752
3d901102
JB		 753 cancel_work_sync(&sdata->activate_links_work);
754
a05829a7 755 wiphy_lock(sdata->local->hw.wiphy);
4b7afb52 756 ieee80211_do_stop(sdata, true);
a05829a7 757 wiphy_unlock(sdata->local->hw.wiphy);
4b6f1dd6 758
4b7afb52 759 return 0;
4b6f1dd6
JB		 760}
761
4b7afb52 762static void ieee80211_set_multicast_list(struct net_device *dev)
87490f6d 763{
4b7afb52 764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
87490f6d 765 struct ieee80211_local *local = sdata->local;
4b7afb52 766 int allmulti, sdata_allmulti;
87490f6d 767
4b7afb52
FF		 768 allmulti = !!(dev->flags & IFF_ALLMULTI);
769 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
665c93a9 770
4b7afb52
FF		 771 if (allmulti != sdata_allmulti) {
772 if (dev->flags & IFF_ALLMULTI)
773 atomic_inc(&local->iff_allmultis);
774 else
775 atomic_dec(&local->iff_allmultis);
776 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
777 }
665c93a9 778
4b7afb52
FF		 779 spin_lock_bh(&local->filter_lock);
780 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
781 spin_unlock_bh(&local->filter_lock);
782 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
783}
665c93a9 784
4b7afb52
FF		 785/*
786 * Called when the netdev is removed or, by the code below, before
787 * the interface type changes.
788 */
789static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
790{
4b7afb52
FF		 791 /* free extra data */
792 ieee80211_free_keys(sdata, false);
f9dca80b 793
4b7afb52 794 ieee80211_debugfs_remove_netdev(sdata);
0d143fe1 795
3a11ce08 796 ieee80211_destroy_frag_cache(&sdata->frags);
0d143fe1 797
4b7afb52
FF		 798 if (ieee80211_vif_is_mesh(&sdata->vif))
799 ieee80211_mesh_teardown_sdata(sdata);
b2e8434f
JB		 800
801 ieee80211_vif_clear_links(sdata);
802 ieee80211_link_stop(&sdata->deflink);
4b7afb52 803}
0d143fe1 804
4b7afb52
FF		 805static void ieee80211_uninit(struct net_device *dev)
806{
807 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
808}
075e0847 809
4b7afb52
FF		 810static void
811ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
812{
6401297e 813 dev_fetch_sw_netstats(stats, dev->tstats);
4b7afb52 814}
e3b90ca2 815
4b7afb52
FF		 816static const struct net_device_ops ieee80211_dataif_ops = {
817 .ndo_open = ieee80211_open,
818 .ndo_stop = ieee80211_stop,
819 .ndo_uninit = ieee80211_uninit,
820 .ndo_start_xmit = ieee80211_subif_start_xmit,
821 .ndo_set_rx_mode = ieee80211_set_multicast_list,
822 .ndo_set_mac_address = ieee80211_change_mac,
4b7afb52
FF		 823 .ndo_get_stats64 = ieee80211_get_stats64,
824};
e3b90ca2 825
4b7afb52
FF		 826static u16 ieee80211_monitor_select_queue(struct net_device *dev,
827 struct sk_buff *skb,
828 struct net_device *sb_dev)
829{
830 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
831 struct ieee80211_local *local = sdata->local;
832 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
833 struct ieee80211_hdr *hdr;
834 int len_rthdr;
90e8f58d 835
4b7afb52
FF		 836 if (local->hw.queues < IEEE80211_NUM_ACS)
837 return 0;
0d143fe1 838
4b7afb52
FF		 839 /* reset flags and info before parsing radiotap header */
840 memset(info, 0, sizeof(*info));
59034591 841
4b7afb52
FF		 842 if (!ieee80211_parse_tx_radiotap(skb, dev))
843 return 0; /* doesn't matter, frame will be dropped */
0d143fe1 844
4b7afb52
FF		 845 len_rthdr = ieee80211_get_radiotap_len(skb->data);
846 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
847 if (skb->len < len_rthdr + 2 ||
848 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
849 return 0; /* doesn't matter, frame will be dropped */
2d2080c3 850
4b7afb52
FF		 851 return ieee80211_select_queue_80211(sdata, skb, hdr);
852}
0d143fe1 853
4b7afb52
FF		 854static const struct net_device_ops ieee80211_monitorif_ops = {
855 .ndo_open = ieee80211_open,
856 .ndo_stop = ieee80211_stop,
857 .ndo_uninit = ieee80211_uninit,
858 .ndo_start_xmit = ieee80211_monitor_start_xmit,
859 .ndo_set_rx_mode = ieee80211_set_multicast_list,
860 .ndo_set_mac_address = ieee80211_change_mac,
861 .ndo_select_queue = ieee80211_monitor_select_queue,
862 .ndo_get_stats64 = ieee80211_get_stats64,
863};
0d143fe1 864
d787a3e3
FF		 865static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
866 struct net_device_path *path)
867{
868 struct ieee80211_sub_if_data *sdata;
869 struct ieee80211_local *local;
870 struct sta_info *sta;
871 int ret = -ENOENT;
872
873 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
874 local = sdata->local;
875
876 if (!local->ops->net_fill_forward_path)
877 return -EOPNOTSUPP;
878
879 rcu_read_lock();
880 switch (sdata->vif.type) {
881 case NL80211_IFTYPE_AP_VLAN:
882 sta = rcu_dereference(sdata->u.vlan.sta);
883 if (sta)
884 break;
885 if (sdata->wdev.use_4addr)
886 goto out;
887 if (is_multicast_ether_addr(ctx->daddr))
888 goto out;
889 sta = sta_info_get_bss(sdata, ctx->daddr);
890 break;
891 case NL80211_IFTYPE_AP:
892 if (is_multicast_ether_addr(ctx->daddr))
893 goto out;
894 sta = sta_info_get(sdata, ctx->daddr);
895 break;
896 case NL80211_IFTYPE_STATION:
897 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
898 sta = sta_info_get(sdata, ctx->daddr);
899 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
900 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
901 goto out;
902
903 break;
904 }
905 }
906
bfd8403a 907 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
d787a3e3
FF		 908 break;
909 default:
910 goto out;
911 }
912
913 if (!sta)
914 goto out;
915
916 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
917out:
918 rcu_read_unlock();
919
920 return ret;
921}
922
4b7afb52
FF		 923static const struct net_device_ops ieee80211_dataif_8023_ops = {
924 .ndo_open = ieee80211_open,
925 .ndo_stop = ieee80211_stop,
926 .ndo_uninit = ieee80211_uninit,
927 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
928 .ndo_set_rx_mode = ieee80211_set_multicast_list,
929 .ndo_set_mac_address = ieee80211_change_mac,
4b7afb52 930 .ndo_get_stats64 = ieee80211_get_stats64,
d787a3e3 931 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
4b7afb52 932};
1be7fe8d 933
80a915ec 934static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
4b7afb52
FF		 935{
936 switch (iftype) {
937 /* P2P GO and client are mapped to AP/STATION types */
938 case NL80211_IFTYPE_AP:
939 case NL80211_IFTYPE_STATION:
940 return true;
f64331d5 941 default:
4b7afb52 942 return false;
0d143fe1 943 }
4b7afb52 944}
0d143fe1 945
4b7afb52
FF		 946static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
947{
948 struct ieee80211_local *local = sdata->local;
949 u32 flags;
965bedad 950
4b7afb52 951 flags = sdata->vif.offload_flags;
2b730daa 952
4b7afb52 953 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
80a915ec 954 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
4b7afb52 955 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 956
4b7afb52
FF		 957 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
958 local->hw.wiphy->frag_threshold != (u32)-1)
959 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 960
4b7afb52
FF		 961 if (local->monitors)
962 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
963 } else {
964 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 965 }
0d143fe1 966
80a915ec
FF		 967 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
968 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
969 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
970
55f8205e
S		 971 if (local->monitors &&
972 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
80a915ec
FF		 973 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
974 } else {
975 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
976 }
977
4b7afb52
FF		 978 if (sdata->vif.offload_flags == flags)
979 return false;
980
981 sdata->vif.offload_flags = flags;
80a915ec 982 ieee80211_check_fast_rx_iface(sdata);
4b7afb52 983 return true;
0d143fe1
JB		 984}
985
4b7afb52 986static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
0d143fe1 987{
4b7afb52
FF		 988 struct ieee80211_local *local = sdata->local;
989 struct ieee80211_sub_if_data *bss = sdata;
990 bool enabled;
34d4bc4d 991
4b7afb52
FF		 992 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
993 if (!sdata->bss)
994 return;
34d4bc4d 995
4b7afb52
FF		 996 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
997 }
34d4bc4d 998
4b7afb52 999 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
80a915ec 1000 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
4b7afb52 1001 return;
34d4bc4d 1002
4b7afb52
FF		 1003 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1004 if (sdata->wdev.use_4addr &&
1005 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1006 enabled = false;
0d143fe1 1007
4b7afb52
FF		 1008 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1009 &ieee80211_dataif_ops;
1010}
c29acf20 1011
4b7afb52
FF		 1012static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1013{
1014 struct ieee80211_local *local = sdata->local;
1015 struct ieee80211_sub_if_data *vsdata;
352ffad6 1016
4b7afb52
FF		 1017 if (ieee80211_set_sdata_offload_flags(sdata)) {
1018 drv_update_vif_offload(local, sdata);
1019 ieee80211_set_vif_encap_ops(sdata);
1020 }
0d143fe1 1021
4b7afb52
FF		 1022 list_for_each_entry(vsdata, &local->interfaces, list) {
1023 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1024 vsdata->bss != &sdata->u.ap)
1025 continue;
af6b6374 1026
4b7afb52 1027 ieee80211_set_vif_encap_ops(vsdata);
8ffcc704 1028 }
4b7afb52 1029}
cd7760e6 1030
4b7afb52
FF		 1031void ieee80211_recalc_offload(struct ieee80211_local *local)
1032{
1033 struct ieee80211_sub_if_data *sdata;
0d143fe1 1034
4b7afb52
FF		 1035 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1036 return;
0d143fe1 1037
4b7afb52 1038 mutex_lock(&local->iflist_mtx);
e3b90ca2 1039
4b7afb52
FF		 1040 list_for_each_entry(sdata, &local->interfaces, list) {
1041 if (!ieee80211_sdata_running(sdata))
1042 continue;
1043
1044 ieee80211_recalc_sdata_offload(sdata);
f142c6b9 1045 }
3ac64bee 1046
4b7afb52
FF		 1047 mutex_unlock(&local->iflist_mtx);
1048}
0d143fe1 1049
4b7afb52
FF		 1050void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1051 const int offset)
1052{
1053 struct ieee80211_local *local = sdata->local;
1054 u32 flags = sdata->u.mntr.flags;
59af6928 1055
4b7afb52
FF		 1056#define ADJUST(_f, _s) do { \
1057 if (flags & MONITOR_FLAG_##_f) \
1058 local->fif_##_s += offset; \
1059 } while (0)
04ecd257 1060
4b7afb52
FF		 1061 ADJUST(FCSFAIL, fcsfail);
1062 ADJUST(PLCPFAIL, plcpfail);
1063 ADJUST(CONTROL, control);
1064 ADJUST(CONTROL, pspoll);
1065 ADJUST(OTHER_BSS, other_bss);
164eb02d 1066
4b7afb52
FF		 1067#undef ADJUST
1068}
1069
1070static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1071{
1072 struct ieee80211_local *local = sdata->local;
1073 int i;
1074
1075 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1076 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1077 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1078 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1079 sdata->vif.hw_queue[i] = i;
1080 else
1081 sdata->vif.hw_queue[i] = 0;
164eb02d 1082 }
4b7afb52
FF		 1083 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1084}
164eb02d 1085
8e14130d
JB		 1086static void ieee80211_sdata_init(struct ieee80211_local *local,
1087 struct ieee80211_sub_if_data *sdata)
1088{
1089 sdata->local = local;
1090
1091 /*
1092 * Initialize the default link, so we can use link_id 0 for non-MLD,
1093 * and that continues to work for non-MLD-aware drivers that use just
1094 * vif.bss_conf instead of vif.link_conf.
1095 *
1096 * Note that we never change this, so if link ID 0 isn't used in an
1097 * MLD connection, we get a separate allocation for it.
1098 */
d8787ec6 1099 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
8e14130d
JB		 1100}
1101
4b7afb52
FF		 1102int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1103{
1104 struct ieee80211_sub_if_data *sdata;
1105 int ret;
0d143fe1 1106
4b7afb52
FF		 1107 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1108 return 0;
397a7a24 1109
4b7afb52 1110 ASSERT_RTNL();
6dd23603 1111 lockdep_assert_wiphy(local->hw.wiphy);
0d143fe1 1112
4b7afb52
FF		 1113 if (local->monitor_sdata)
1114 return 0;
0d143fe1 1115
4b7afb52
FF		 1116 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1117 if (!sdata)
1118 return -ENOMEM;
0d143fe1 1119
4b7afb52 1120 /* set up data */
4b7afb52
FF		 1121 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1122 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1123 wiphy_name(local->hw.wiphy));
1124 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
0d143fe1 1125
8e14130d
JB		 1126 ieee80211_sdata_init(local, sdata);
1127
4b7afb52 1128 ieee80211_set_default_queues(sdata);
167e33f4 1129
4b7afb52
FF		 1130 ret = drv_add_interface(local, sdata);
1131 if (WARN_ON(ret)) {
1132 /* ok .. stupid driver, it asked for this! */
1133 kfree(sdata);
1134 return ret;
1135 }
1136
bdeca45a
BA		 1137 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1138
4b7afb52
FF		 1139 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1140 if (ret) {
1141 kfree(sdata);
1142 return ret;
0d143fe1
JB		 1143 }
1144
4b7afb52
FF		 1145 mutex_lock(&local->iflist_mtx);
1146 rcu_assign_pointer(local->monitor_sdata, sdata);
1147 mutex_unlock(&local->iflist_mtx);
1148
1149 mutex_lock(&local->mtx);
d8675a63 1150 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chandef,
b4f85443 1151 IEEE80211_CHANCTX_EXCLUSIVE);
4b7afb52
FF		 1152 mutex_unlock(&local->mtx);
1153 if (ret) {
1154 mutex_lock(&local->iflist_mtx);
1155 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1156 mutex_unlock(&local->iflist_mtx);
1157 synchronize_net();
1158 drv_remove_interface(local, sdata);
1159 kfree(sdata);
1160 return ret;
5061b0c2 1161 }
075e0847 1162
4b7afb52 1163 skb_queue_head_init(&sdata->skb_queue);
f5a4c24e 1164 skb_queue_head_init(&sdata->status_queue);
4b7afb52 1165 INIT_WORK(&sdata->work, ieee80211_iface_work);
53168215 1166
4b7afb52
FF		 1167 return 0;
1168}
ba8c3d6f 1169
4b7afb52
FF		 1170void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1171{
1172 struct ieee80211_sub_if_data *sdata;
b2c0958b 1173
4b7afb52
FF		 1174 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1175 return;
5c21e810 1176
4b7afb52 1177 ASSERT_RTNL();
6dd23603 1178 lockdep_assert_wiphy(local->hw.wiphy);
4b7afb52
FF		 1179
1180 mutex_lock(&local->iflist_mtx);
1181
1182 sdata = rcu_dereference_protected(local->monitor_sdata,
1183 lockdep_is_held(&local->iflist_mtx));
1184 if (!sdata) {
1185 mutex_unlock(&local->iflist_mtx);
b2c0958b
JB		 1186 return;
1187 }
1188
4b7afb52
FF		 1189 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1190 mutex_unlock(&local->iflist_mtx);
1191
1192 synchronize_net();
1193
1194 mutex_lock(&local->mtx);
d8675a63 1195 ieee80211_link_release_channel(&sdata->deflink);
4b7afb52
FF		 1196 mutex_unlock(&local->mtx);
1197
1198 drv_remove_interface(local, sdata);
1199
1200 kfree(sdata);
1201}
1202
1203/*
1204 * NOTE: Be very careful when changing this function, it must NOT return
1205 * an error on interface type changes that have been pre-checked, so most
1206 * checks should be in ieee80211_check_concurrent_iface.
1207 */
1208int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1209{
1210 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1211 struct net_device *dev = wdev->netdev;
1212 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 1213 u32 changed = 0;
1214 int res;
1215 u32 hw_reconf_flags = 0;
1216
b2c0958b 1217 switch (sdata->vif.type) {
4b7afb52
FF		 1218 case NL80211_IFTYPE_AP_VLAN: {
1219 struct ieee80211_sub_if_data *master;
1220
1221 if (!sdata->bss)
1222 return -ENOLINK;
b2c0958b
JB		 1223
1224 mutex_lock(&local->mtx);
4b7afb52 1225 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
b2c0958b 1226 mutex_unlock(&local->mtx);
31eba5bc 1227
4b7afb52
FF		 1228 master = container_of(sdata->bss,
1229 struct ieee80211_sub_if_data, u.ap);
1230 sdata->control_port_protocol =
1231 master->control_port_protocol;
1232 sdata->control_port_no_encrypt =
1233 master->control_port_no_encrypt;
1234 sdata->control_port_over_nl80211 =
1235 master->control_port_over_nl80211;
1236 sdata->control_port_no_preauth =
1237 master->control_port_no_preauth;
1238 sdata->vif.cab_queue = master->vif.cab_queue;
1239 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1240 sizeof(sdata->vif.hw_queue));
1241 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
b2c0958b 1242
4b7afb52
FF		 1243 mutex_lock(&local->key_mtx);
1244 sdata->crypto_tx_tailroom_needed_cnt +=
1245 master->crypto_tx_tailroom_needed_cnt;
1246 mutex_unlock(&local->key_mtx);
b2c0958b 1247
4b7afb52
FF		 1248 break;
1249 }
1250 case NL80211_IFTYPE_AP:
1251 sdata->bss = &sdata->u.ap;
1252 break;
1253 case NL80211_IFTYPE_MESH_POINT:
1254 case NL80211_IFTYPE_STATION:
1255 case NL80211_IFTYPE_MONITOR:
1256 case NL80211_IFTYPE_ADHOC:
1257 case NL80211_IFTYPE_P2P_DEVICE:
1258 case NL80211_IFTYPE_OCB:
1259 case NL80211_IFTYPE_NAN:
1260 /* no special treatment */
1261 break;
1262 case NL80211_IFTYPE_UNSPECIFIED:
1263 case NUM_NL80211_IFTYPES:
1264 case NL80211_IFTYPE_P2P_CLIENT:
1265 case NL80211_IFTYPE_P2P_GO:
70d9c599 1266 case NL80211_IFTYPE_WDS:
4b7afb52
FF		 1267 /* cannot happen */
1268 WARN_ON(1);
1269 break;
1270 }
46238845 1271
b2c0958b 1272 if (local->open_count == 0) {
4b7afb52
FF		 1273 res = drv_start(local);
1274 if (res)
1275 goto err_del_bss;
1276 /* we're brought up, everything changes */
1277 hw_reconf_flags = ~0;
1278 ieee80211_led_radio(local, true);
1279 ieee80211_mod_tpt_led_trig(local,
1280 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
b2c0958b
JB		 1281 }
1282
4b7afb52
FF		 1283 /*
1284 * Copy the hopefully now-present MAC address to
1285 * this interface, if it has the special null one.
1286 */
1287 if (dev && is_zero_ether_addr(dev->dev_addr)) {
de1352ea 1288 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
4b7afb52 1289 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
34d4bc4d 1290
4b7afb52
FF		 1291 if (!is_valid_ether_addr(dev->dev_addr)) {
1292 res = -EADDRNOTAVAIL;
1293 goto err_stop;
1294 }
1295 }
34d4bc4d 1296
4b7afb52
FF		 1297 switch (sdata->vif.type) {
1298 case NL80211_IFTYPE_AP_VLAN:
1299 /* no need to tell driver, but set carrier and chanctx */
bfd8403a 1300 if (sdata->bss->active) {
d8675a63 1301 ieee80211_link_vlan_copy_chanctx(&sdata->deflink);
4b7afb52
FF		 1302 netif_carrier_on(dev);
1303 ieee80211_set_vif_encap_ops(sdata);
1304 } else {
1305 netif_carrier_off(dev);
1306 }
1307 break;
1308 case NL80211_IFTYPE_MONITOR:
1309 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1310 local->cooked_mntrs++;
1311 break;
1312 }
5061b0c2 1313
4b7afb52
FF		 1314 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1315 res = drv_add_interface(local, sdata);
1316 if (res)
1317 goto err_stop;
1318 } else if (local->monitors == 0 && local->open_count == 0) {
1319 res = ieee80211_add_virtual_monitor(local);
1320 if (res)
1321 goto err_stop;
1322 }
0d143fe1 1323
4b7afb52
FF		 1324 /* must be before the call to ieee80211_configure_filter */
1325 local->monitors++;
1326 if (local->monitors == 1) {
1327 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1328 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1329 }
0d143fe1 1330
4b7afb52
FF		 1331 ieee80211_adjust_monitor_flags(sdata, 1);
1332 ieee80211_configure_filter(local);
1333 ieee80211_recalc_offload(local);
1334 mutex_lock(&local->mtx);
1335 ieee80211_recalc_idle(local);
1336 mutex_unlock(&local->mtx);
0d143fe1 1337
4b7afb52
FF		 1338 netif_carrier_on(dev);
1339 break;
1340 default:
1341 if (coming_up) {
1342 ieee80211_del_virtual_monitor(local);
1343 ieee80211_set_sdata_offload_flags(sdata);
0d143fe1 1344
4b7afb52
FF		 1345 res = drv_add_interface(local, sdata);
1346 if (res)
1347 goto err_stop;
0d143fe1 1348
4b7afb52
FF		 1349 ieee80211_set_vif_encap_ops(sdata);
1350 res = ieee80211_check_queues(sdata,
1351 ieee80211_vif_type_p2p(&sdata->vif));
1352 if (res)
1353 goto err_del_interface;
1354 }
f0706e82 1355
4b7afb52
FF		 1356 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1357 local->fif_pspoll++;
1358 local->fif_probe_req++;
75636525 1359
4b7afb52
FF		 1360 ieee80211_configure_filter(local);
1361 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1362 local->fif_probe_req++;
1363 }
aee14ceb 1364
4b7afb52
FF		 1365 if (sdata->vif.probe_req_reg)
1366 drv_config_iface_filter(local, sdata,
1367 FIF_PROBE_REQ,
1368 FIF_PROBE_REQ);
11a843b7 1369
4b7afb52
FF		 1370 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1371 sdata->vif.type != NL80211_IFTYPE_NAN)
1372 changed |= ieee80211_reset_erp_info(sdata);
d8675a63
JB		 1373 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1374 changed);
f0706e82 1375
4b7afb52
FF		 1376 switch (sdata->vif.type) {
1377 case NL80211_IFTYPE_STATION:
1378 case NL80211_IFTYPE_ADHOC:
1379 case NL80211_IFTYPE_AP:
1380 case NL80211_IFTYPE_MESH_POINT:
1381 case NL80211_IFTYPE_OCB:
1382 netif_carrier_off(dev);
1383 break;
4b7afb52
FF		 1384 case NL80211_IFTYPE_P2P_DEVICE:
1385 case NL80211_IFTYPE_NAN:
1386 break;
1387 default:
1388 /* not reached */
1389 WARN_ON(1);
1390 }
f142c6b9 1391
4b7afb52
FF		 1392 /*
1393 * Set default queue parameters so drivers don't
1394 * need to initialise the hardware if the hardware
1395 * doesn't start up with sane defaults.
1396 * Enable QoS for anything but station interfaces.
1397 */
b3e2130b 1398 ieee80211_set_wmm_default(&sdata->deflink, true,
4b7afb52
FF		 1399 sdata->vif.type != NL80211_IFTYPE_STATION);
1400 }
cf0277e7 1401
4b7afb52 1402 switch (sdata->vif.type) {
4b7afb52
FF		 1403 case NL80211_IFTYPE_P2P_DEVICE:
1404 rcu_assign_pointer(local->p2p_sdata, sdata);
1405 break;
1406 case NL80211_IFTYPE_MONITOR:
1407 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1408 break;
1409 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1410 break;
1411 default:
1412 break;
5a490510 1413 }
5a490510 1414
4b7afb52
FF		 1415 /*
1416 * set_multicast_list will be invoked by the networking core
1417 * which will check whether any increments here were done in
1418 * error and sync them down to the hardware as filter flags.
1419 */
1420 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1421 atomic_inc(&local->iff_allmultis);
587e729e 1422
4b7afb52
FF		 1423 if (coming_up)
1424 local->open_count++;
cf0277e7 1425
4b7afb52
FF		 1426 if (hw_reconf_flags)
1427 ieee80211_hw_config(local, hw_reconf_flags);
cf0277e7 1428
4b7afb52 1429 ieee80211_recalc_ps(local);
cb17ed29 1430
c95014e1
AW		 1431 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1432
4b7afb52
FF		 1433 return 0;
1434 err_del_interface:
1435 drv_remove_interface(local, sdata);
1436 err_stop:
1437 if (!local->open_count)
1438 drv_stop(local);
1439 err_del_bss:
1440 sdata->bss = NULL;
1441 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1442 mutex_lock(&local->mtx);
1443 list_del(&sdata->u.vlan.list);
1444 mutex_unlock(&local->mtx);
1445 }
1446 /* might already be clear but that doesn't matter */
1447 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1448 return res;
1449}
50ff477a 1450
5a490510
JB		 1451static void ieee80211_if_free(struct net_device *dev)
1452{
1453 free_percpu(dev->tstats);
5a490510
JB		 1454}
1455
587e729e
JB		 1456static void ieee80211_if_setup(struct net_device *dev)
1457{
1458 ether_setup(dev);
550fd08c 1459 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
107395f9 1460 dev->priv_flags |= IFF_NO_QUEUE;
587e729e 1461 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1462 dev->needs_free_netdev = true;
1463 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1464}
1465
07bd1c79
JB		 1466static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1467 struct ieee80211_sub_if_data *sdata,
1468 struct sk_buff *skb)
1469{
1470 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1471
1472 if (ieee80211_is_action(mgmt->frame_control) &&
1473 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1474 struct sta_info *sta;
1475 int len = skb->len;
1476
1477 mutex_lock(&local->sta_mtx);
1478 sta = sta_info_get_bss(sdata, mgmt->sa);
1479 if (sta) {
1480 switch (mgmt->u.action.u.addba_req.action_code) {
1481 case WLAN_ACTION_ADDBA_REQ:
1482 ieee80211_process_addba_request(local, sta,
1483 mgmt, len);
1484 break;
1485 case WLAN_ACTION_ADDBA_RESP:
1486 ieee80211_process_addba_resp(local, sta,
1487 mgmt, len);
1488 break;
1489 case WLAN_ACTION_DELBA:
1490 ieee80211_process_delba(sdata, sta,
1491 mgmt, len);
1492 break;
1493 default:
1494 WARN_ON(1);
1495 break;
1496 }
1497 }
1498 mutex_unlock(&local->sta_mtx);
1499 } else if (ieee80211_is_action(mgmt->frame_control) &&
1500 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1501 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1502 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1503 struct ieee80211_rx_status *status;
1504 enum nl80211_band band;
1505 struct sta_info *sta;
1506 u8 opmode;
1507
1508 status = IEEE80211_SKB_RXCB(skb);
1509 band = status->band;
1510 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1511
1512 mutex_lock(&local->sta_mtx);
1513 sta = sta_info_get_bss(sdata, mgmt->sa);
1514
1515 if (sta)
c71420db
JB		 1516 ieee80211_vht_handle_opmode(sdata,
1517 &sta->deflink,
afe0d181 1518 opmode, band);
07bd1c79
JB		 1519
1520 mutex_unlock(&local->sta_mtx);
1521 break;
1522 }
1523 case WLAN_VHT_ACTION_GROUPID_MGMT:
d8675a63
JB		 1524 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1525 mgmt);
07bd1c79
JB		 1526 break;
1527 default:
1528 WARN_ON(1);
1529 break;
1530 }
f5a4c24e
LB		 1531 } else if (ieee80211_is_action(mgmt->frame_control) &&
1532 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1533 switch (mgmt->u.action.u.s1g.action_code) {
1534 case WLAN_S1G_TWT_TEARDOWN:
1535 case WLAN_S1G_TWT_SETUP:
1536 ieee80211_s1g_rx_twt_action(sdata, skb);
1537 break;
1538 default:
1539 break;
1540 }
07bd1c79
JB		 1541 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1542 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1543 ieee80211_sta_rx_queued_ext(sdata, skb);
1544 else
1545 WARN_ON(1);
1546 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1547 struct ieee80211_hdr *hdr = (void *)mgmt;
1548 struct sta_info *sta;
1549
1550 /*
1551 * So the frame isn't mgmt, but frame_control
1552 * is at the right place anyway, of course, so
1553 * the if statement is correct.
1554 *
1555 * Warn if we have other data frame types here,
1556 * they must not get here.
1557 */
1558 WARN_ON(hdr->frame_control &
1559 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1560 WARN_ON(!(hdr->seq_ctrl &
1561 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1562 /*
1563 * This was a fragment of a frame, received while
1564 * a block-ack session was active. That cannot be
1565 * right, so terminate the session.
1566 */
1567 mutex_lock(&local->sta_mtx);
1568 sta = sta_info_get_bss(sdata, mgmt->sa);
1569 if (sta) {
1570 u16 tid = ieee80211_get_tid(hdr);
1571
1572 __ieee80211_stop_rx_ba_session(
1573 sta, tid, WLAN_BACK_RECIPIENT,
1574 WLAN_REASON_QSTA_REQUIRE_SETUP,
1575 true);
1576 }
1577 mutex_unlock(&local->sta_mtx);
1578 } else switch (sdata->vif.type) {
1579 case NL80211_IFTYPE_STATION:
1580 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1581 break;
1582 case NL80211_IFTYPE_ADHOC:
1583 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1584 break;
1585 case NL80211_IFTYPE_MESH_POINT:
1586 if (!ieee80211_vif_is_mesh(&sdata->vif))
1587 break;
1588 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1589 break;
1590 default:
1591 WARN(1, "frame for unexpected interface type");
1592 break;
1593 }
1594}
1595
f5a4c24e
LB		 1596static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1597 struct sk_buff *skb)
1598{
1599 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1600
1601 if (ieee80211_is_action(mgmt->frame_control) &&
1602 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1603 switch (mgmt->u.action.u.s1g.action_code) {
1604 case WLAN_S1G_TWT_TEARDOWN:
1605 case WLAN_S1G_TWT_SETUP:
1606 ieee80211_s1g_status_twt_action(sdata, skb);
1607 break;
1608 default:
1609 break;
1610 }
1611 }
1612}
1613
1fa57d01
JB		 1614static void ieee80211_iface_work(struct work_struct *work)
1615{
1616 struct ieee80211_sub_if_data *sdata =
1617 container_of(work, struct ieee80211_sub_if_data, work);
1618 struct ieee80211_local *local = sdata->local;
1619 struct sk_buff *skb;
1620
1621 if (!ieee80211_sdata_running(sdata))
1622 return;
1623
fc58c47e 1624 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1625 return;
1626
4afaff17 1627 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1628 return;
1629
1630 /* first process frames */
1631 while ((skb = skb_dequeue(&sdata->skb_queue))) {
261e411b 1632 kcov_remote_start_common(skb_get_kcov_handle(skb));
bed7ee6e 1633
f057d140
JB		 1634 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1635 ieee80211_process_tdls_channel_switch(sdata, skb);
1636 else
1637 ieee80211_iface_process_skb(local, sdata, skb);
36b3a628
JB		 1638
1639 kfree_skb(skb);
261e411b 1640 kcov_remote_stop();
1fa57d01
JB		 1641 }
1642
f5a4c24e
LB		 1643 /* process status queue */
1644 while ((skb = skb_dequeue(&sdata->status_queue))) {
1645 kcov_remote_start_common(skb_get_kcov_handle(skb));
1646
1647 ieee80211_iface_process_status(sdata, skb);
1648 kfree_skb(skb);
1649
1650 kcov_remote_stop();
1651 }
1652
1fa57d01
JB		 1653 /* then other type-dependent work */
1654 switch (sdata->vif.type) {
1655 case NL80211_IFTYPE_STATION:
1656 ieee80211_sta_work(sdata);
1657 break;
1658 case NL80211_IFTYPE_ADHOC:
1659 ieee80211_ibss_work(sdata);
1660 break;
1661 case NL80211_IFTYPE_MESH_POINT:
1662 if (!ieee80211_vif_is_mesh(&sdata->vif))
1663 break;
1664 ieee80211_mesh_work(sdata);
1665 break;
239281f8
RL		 1666 case NL80211_IFTYPE_OCB:
1667 ieee80211_ocb_work(sdata);
1668 break;
1fa57d01
JB		 1669 default:
1670 break;
1671 }
1672}
1673
04ecd257
JB		 1674static void ieee80211_recalc_smps_work(struct work_struct *work)
1675{
1676 struct ieee80211_sub_if_data *sdata =
1677 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1678
d8675a63 1679 ieee80211_recalc_smps(sdata, &sdata->deflink);
04ecd257 1680}
1fa57d01 1681
3d901102
JB		 1682static void ieee80211_activate_links_work(struct work_struct *work)
1683{
1684 struct ieee80211_sub_if_data *sdata =
1685 container_of(work, struct ieee80211_sub_if_data,
1686 activate_links_work);
1687
1688 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1689}
1690
75636525
JB		 1691/*
1692 * Helper function to initialise an interface to a specific type.
1693 */
1694static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1695 enum nl80211_iftype type)
f0706e82 1696{
239281f8
RL		 1697 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1698 0xff, 0xff, 0xff};
1699
bfd8403a 1700 /* clear type-dependent unions */
75636525 1701 memset(&sdata->u, 0, sizeof(sdata->u));
bfd8403a 1702 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
75636525
JB		 1703
1704 /* and set some type-dependent values */
1705 sdata->vif.type = type;
2ca27bcf 1706 sdata->vif.p2p = false;
60719ffd 1707 sdata->wdev.iftype = type;
75636525 1708
a621fa4d
JB		 1709 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1710 sdata->control_port_no_encrypt = false;
7f3f96ce
MT		 1711 sdata->control_port_over_nl80211 = false;
1712 sdata->control_port_no_preauth = false;
f276e20b 1713 sdata->vif.cfg.idle = true;
db6d9e9e 1714 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
a621fa4d 1715
b53be792
SW		 1716 sdata->noack_map = 0;
1717
f142c6b9
JB		 1718 /* only monitor/p2p-device differ */
1719 if (sdata->dev) {
1720 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1721 sdata->dev->type = ARPHRD_ETHER;
1722 }
75636525 1723
35f20c14 1724 skb_queue_head_init(&sdata->skb_queue);
f5a4c24e 1725 skb_queue_head_init(&sdata->status_queue);
1fa57d01 1726 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1727 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
3d901102 1728 INIT_WORK(&sdata->activate_links_work, ieee80211_activate_links_work);
35f20c14 1729
75636525 1730 switch (type) {
2ca27bcf
JB		 1731 case NL80211_IFTYPE_P2P_GO:
1732 type = NL80211_IFTYPE_AP;
1733 sdata->vif.type = type;
1734 sdata->vif.p2p = true;
fc0561dc 1735 fallthrough;
05c914fe 1736 case NL80211_IFTYPE_AP:
d012a605 1737 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1738 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1739 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1740 break;
2ca27bcf
JB		 1741 case NL80211_IFTYPE_P2P_CLIENT:
1742 type = NL80211_IFTYPE_STATION;
1743 sdata->vif.type = type;
1744 sdata->vif.p2p = true;
fc0561dc 1745 fallthrough;
05c914fe 1746 case NL80211_IFTYPE_STATION:
bfd8403a 1747 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
9c6bd790 1748 ieee80211_sta_setup_sdata(sdata);
472dbc45 1749 break;
6e0bd6c3 1750 case NL80211_IFTYPE_OCB:
239281f8
RL		 1751 sdata->vif.bss_conf.bssid = bssid_wildcard;
1752 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1753 break;
46900298 1754 case NL80211_IFTYPE_ADHOC:
ad2d223a 1755 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1756 ieee80211_ibss_setup_sdata(sdata);
1757 break;
05c914fe 1758 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1759 if (ieee80211_vif_is_mesh(&sdata->vif))
1760 ieee80211_mesh_init_sdata(sdata);
1761 break;
05c914fe 1762 case NL80211_IFTYPE_MONITOR:
75636525 1763 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1764 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1765 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1766 MONITOR_FLAG_OTHER_BSS;
1767 break;
167e33f4
AB		 1768 case NL80211_IFTYPE_NAN:
1769 idr_init(&sdata->u.nan.function_inst_ids);
1770 spin_lock_init(&sdata->u.nan.func_lock);
1771 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1772 break;
05c914fe 1773 case NL80211_IFTYPE_AP_VLAN:
98104fde 1774 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1775 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1776 break;
05c914fe 1777 case NL80211_IFTYPE_UNSPECIFIED:
70d9c599 1778 case NL80211_IFTYPE_WDS:
2e161f78 1779 case NUM_NL80211_IFTYPES:
c7976f52 1780 WARN_ON(1);
75636525
JB		 1781 break;
1782 }
1783
b2e8434f
JB		 1784 /* need to do this after the switch so vif.type is correct */
1785 ieee80211_link_setup(&sdata->deflink);
1786
75636525
JB		 1787 ieee80211_debugfs_add_netdev(sdata);
1788}
1789
34d4bc4d
JB		 1790static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1791 enum nl80211_iftype type)
1792{
1793 struct ieee80211_local *local = sdata->local;
1794 int ret, err;
2ca27bcf
JB		 1795 enum nl80211_iftype internal_type = type;
1796 bool p2p = false;
34d4bc4d
JB		 1797
1798 ASSERT_RTNL();
1799
1800 if (!local->ops->change_interface)
1801 return -EBUSY;
1802
d8787ec6
JB		 1803 /* for now, don't support changing while links exist */
1804 if (sdata->vif.valid_links)
1805 return -EBUSY;
1806
34d4bc4d
JB		 1807 switch (sdata->vif.type) {
1808 case NL80211_IFTYPE_AP:
d5befb22
JB		 1809 if (!list_empty(&sdata->u.ap.vlans))
1810 return -EBUSY;
1811 break;
34d4bc4d
JB		 1812 case NL80211_IFTYPE_STATION:
1813 case NL80211_IFTYPE_ADHOC:
239281f8 1814 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1815 /*
1816 * Could maybe also all others here?
1817 * Just not sure how that interacts
1818 * with the RX/config path e.g. for
1819 * mesh.
1820 */
1821 break;
1822 default:
1823 return -EBUSY;
1824 }
1825
1826 switch (type) {
1827 case NL80211_IFTYPE_AP:
1828 case NL80211_IFTYPE_STATION:
1829 case NL80211_IFTYPE_ADHOC:
239281f8 1830 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1831 /*
1832 * Could probably support everything
70d9c599 1833 * but here.
34d4bc4d
JB		 1834 */
1835 break;
2ca27bcf
JB		 1836 case NL80211_IFTYPE_P2P_CLIENT:
1837 p2p = true;
1838 internal_type = NL80211_IFTYPE_STATION;
1839 break;
1840 case NL80211_IFTYPE_P2P_GO:
1841 p2p = true;
1842 internal_type = NL80211_IFTYPE_AP;
1843 break;
34d4bc4d
JB		 1844 default:
1845 return -EBUSY;
1846 }
1847
2ca27bcf 1848 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1849 if (ret)
1850 return ret;
1851
054c9939
JB		 1852 ieee80211_stop_vif_queues(local, sdata,
1853 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
b2ddde56 1854 /* do_stop will synchronize_rcu() first thing */
34d4bc4d
JB		 1855 ieee80211_do_stop(sdata, false);
1856
f142c6b9 1857 ieee80211_teardown_sdata(sdata);
34d4bc4d 1858
6aea26ce 1859 ieee80211_set_sdata_offload_flags(sdata);
2ca27bcf 1860 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1861 if (ret)
a9865538 1862 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1863
3a25a8c8
JB		 1864 /*
1865 * Ignore return value here, there's not much we can do since
1866 * the driver changed the interface type internally already.
1867 * The warnings will hopefully make driver authors fix it :-)
1868 */
a9865538 1869 ieee80211_check_queues(sdata, type);
3a25a8c8 1870
34d4bc4d 1871 ieee80211_setup_sdata(sdata, type);
6aea26ce 1872 ieee80211_set_vif_encap_ops(sdata);
34d4bc4d 1873
f142c6b9 1874 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1875 WARN(err, "type change: do_open returned %d", err);
1876
054c9939
JB		 1877 ieee80211_wake_vif_queues(local, sdata,
1878 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
34d4bc4d
JB		 1879 return ret;
1880}
1881
f3947e2d 1882int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1883 enum nl80211_iftype type)
75636525 1884{
34d4bc4d
JB		 1885 int ret;
1886
f3947e2d
JB		 1887 ASSERT_RTNL();
1888
2ca27bcf 1889 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1890 return 0;
1891
34d4bc4d
JB		 1892 if (ieee80211_sdata_running(sdata)) {
1893 ret = ieee80211_runtime_change_iftype(sdata, type);
1894 if (ret)
1895 return ret;
1896 } else {
1897 /* Purge and reset type-dependent state. */
f142c6b9 1898 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1899 ieee80211_setup_sdata(sdata, type);
1900 }
75636525
JB		 1901
1902 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1903 if (type == NL80211_IFTYPE_STATION)
1904 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1905
1906 return 0;
f0706e82
JB		 1907}
1908
fa9029f8 1909static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1910 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1911{
1912 struct ieee80211_sub_if_data *sdata;
1913 u64 mask, start, addr, val, inc;
1914 u8 *m;
1915 u8 tmp_addr[ETH_ALEN];
1916 int i;
1917
1918 /* default ... something at least */
f142c6b9 1919 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1920
1921 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1922 local->hw.wiphy->n_addresses <= 1)
1923 return;
1924
fa9029f8
JB		 1925 mutex_lock(&local->iflist_mtx);
1926
1927 switch (type) {
1928 case NL80211_IFTYPE_MONITOR:
1929 /* doesn't matter */
1930 break;
fa9029f8
JB		 1931 case NL80211_IFTYPE_AP_VLAN:
1932 /* match up with an AP interface */
1933 list_for_each_entry(sdata, &local->interfaces, list) {
1934 if (sdata->vif.type != NL80211_IFTYPE_AP)
1935 continue;
f142c6b9 1936 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1937 break;
1938 }
1939 /* keep default if no AP interface present */
1940 break;
6d71117a
JB		 1941 case NL80211_IFTYPE_P2P_CLIENT:
1942 case NL80211_IFTYPE_P2P_GO:
30686bf7 1943 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1944 list_for_each_entry(sdata, &local->interfaces, list) {
1945 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1946 continue;
1947 if (!ieee80211_sdata_running(sdata))
1948 continue;
1949 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1950 goto out_unlock;
1951 }
1952 }
fc0561dc 1953 fallthrough;
fa9029f8
JB		 1954 default:
1955 /* assign a new address if possible -- try n_addresses first */
1956 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1957 bool used = false;
1958
1959 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1960 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1961 sdata->vif.addr)) {
fa9029f8
JB		 1962 used = true;
1963 break;
1964 }
1965 }
1966
1967 if (!used) {
f142c6b9 1968 memcpy(perm_addr,
fa9029f8
JB		 1969 local->hw.wiphy->addresses[i].addr,
1970 ETH_ALEN);
1971 break;
1972 }
1973 }
1974
1975 /* try mask if available */
1976 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1977 break;
1978
1979 m = local->hw.wiphy->addr_mask;
1980 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1981 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1982 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1983
1984 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1985 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1986 pr_info("not contiguous\n");
fa9029f8
JB		 1987 break;
1988 }
1989
ac20976d
HS		 1990 /*
1991 * Pick address of existing interface in case user changed
1992 * MAC address manually, default to perm_addr.
1993 */
fa9029f8 1994 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1995 list_for_each_entry(sdata, &local->interfaces, list) {
1996 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1997 continue;
1998 m = sdata->vif.addr;
1999 break;
2000 }
fa9029f8
JB		 2001 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2002 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2003 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2004
2005 inc = 1ULL<<__ffs64(mask);
2006 val = (start & mask);
2007 addr = (start & ~mask) | (val & mask);
2008 do {
2009 bool used = false;
2010
2011 tmp_addr[5] = addr >> 0*8;
2012 tmp_addr[4] = addr >> 1*8;
2013 tmp_addr[3] = addr >> 2*8;
2014 tmp_addr[2] = addr >> 3*8;
2015 tmp_addr[1] = addr >> 4*8;
2016 tmp_addr[0] = addr >> 5*8;
2017
2018 val += inc;
2019
2020 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 2021 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 2022 used = true;
2023 break;
2024 }
2025 }
2026
2027 if (!used) {
f142c6b9 2028 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 2029 break;
2030 }
2031 addr = (start & ~mask) | (val & mask);
2032 } while (addr != start);
2033
2034 break;
2035 }
2036
6d71117a 2037 out_unlock:
fa9029f8
JB		 2038 mutex_unlock(&local->iflist_mtx);
2039}
2040
3e122be0 2041int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 2042 unsigned char name_assign_type,
84efbb84 2043 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 2044 struct vif_params *params)
f0706e82 2045{
f142c6b9 2046 struct net_device *ndev = NULL;
f0706e82 2047 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 2048 struct txq_info *txqi;
75636525 2049 int ret, i;
f0706e82
JB		 2050
2051 ASSERT_RTNL();
75636525 2052
708d50ed 2053 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 2054 struct wireless_dev *wdev;
2055
2056 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2057 GFP_KERNEL);
2058 if (!sdata)
2059 return -ENOMEM;
2060 wdev = &sdata->wdev;
2061
2062 sdata->dev = NULL;
28b904ec 2063 strscpy(sdata->name, name, IFNAMSIZ);
f142c6b9
JB		 2064 ieee80211_assign_perm_addr(local, wdev->address, type);
2065 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
d8787ec6 2066 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
f142c6b9 2067 } else {
ba8c3d6f
FF		 2068 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2069 sizeof(void *));
2070 int txq_size = 0;
2071
107395f9 2072 if (type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 2073 (type != NL80211_IFTYPE_MONITOR ||
2074 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 2075 txq_size += sizeof(struct txq_info) +
2076 local->hw.txq_data_size;
2077
ba8c3d6f 2078 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 2079 name, name_assign_type,
107395f9 2080 ieee80211_if_setup, 1, 1);
f142c6b9
JB		 2081 if (!ndev)
2082 return -ENOMEM;
1f6e0baa 2083
f142c6b9
JB		 2084 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2085
5a490510
JB		 2086 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2087 if (!ndev->tstats) {
2088 free_netdev(ndev);
2089 return -ENOMEM;
2090 }
2091
f142c6b9
JB		 2092 ndev->needed_headroom = local->tx_headroom +
2093 4*6 /* four MAC addresses */
2094 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2095 + 6 /* mesh */
2096 + 8 /* rfc1042/bridge tunnel */
2097 - ETH_HLEN /* ethernet hard_header_len */
2098 + IEEE80211_ENCRYPT_HEADROOM;
2099 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2100
2101 ret = dev_alloc_name(ndev, ndev->name);
2102 if (ret < 0) {
e6436be2 2103 ieee80211_if_free(ndev);
c7a61cba 2104 free_netdev(ndev);
f142c6b9
JB		 2105 return ret;
2106 }
2107
2108 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 2109 if (is_valid_ether_addr(params->macaddr))
de1352ea 2110 eth_hw_addr_set(ndev, params->macaddr);
b5dfae02 2111 else
de1352ea 2112 eth_hw_addr_set(ndev, ndev->perm_addr);
f142c6b9
JB		 2113 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2114
2115 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2116 sdata = netdev_priv(ndev);
2117 ndev->ieee80211_ptr = &sdata->wdev;
2118 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
d8787ec6 2119 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
f142c6b9
JB		 2120 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2121
ba8c3d6f
FF		 2122 if (txq_size) {
2123 txqi = netdev_priv(ndev) + size;
fa962b92 2124 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 2125 }
2126
f142c6b9
JB		 2127 sdata->dev = ndev;
2128 }
75636525
JB		 2129
2130 /* initialise type-independent data */
f0706e82 2131 sdata->wdev.wiphy = local->hw.wiphy;
8e14130d
JB		 2132
2133 ieee80211_sdata_init(local, sdata);
75636525 2134
3a11ce08 2135 ieee80211_init_frag_cache(&sdata->frags);
75636525
JB		 2136
2137 INIT_LIST_HEAD(&sdata->key_list);
2138
8d1f7ecd
JB		 2139 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
2140 ieee80211_delayed_tailroom_dec);
97f97b1f 2141
57fbcce3 2142 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 2143 struct ieee80211_supported_band *sband;
2144 sband = local->hw.wiphy->bands[i];
2145 sdata->rc_rateidx_mask[i] =
2146 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 2147 if (sband) {
2148 __le16 cap;
2149 u16 *vht_rate_mask;
2150
19468413
SW		 2151 memcpy(sdata->rc_rateidx_mcs_mask[i],
2152 sband->ht_cap.mcs.rx_mask,
2153 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 2154
2155 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2156 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2157 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2158 } else {
19468413
SW		 2159 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2160 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 2161 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2162 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2163 }
37eb0b16 2164 }
75636525 2165
3a25a8c8
JB		 2166 ieee80211_set_default_queues(sdata);
2167
bfd8403a
JB		 2168 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2169 sdata->deflink.user_power_level = local->user_power_level;
1ea6f9c0 2170
75636525
JB		 2171 /* setup type-dependent data */
2172 ieee80211_setup_sdata(sdata, type);
f0706e82 2173
f142c6b9 2174 if (ndev) {
dd665d23
JB		 2175 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2176 if (type == NL80211_IFTYPE_STATION)
2177 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 2178
f142c6b9 2179 ndev->features |= local->hw.netdev_features;
3c06e91b 2180 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
07b83d2e
JB		 2181 ndev->hw_features |= ndev->features &
2182 MAC80211_SUPPORTED_FEATURES_TX;
7d360f60 2183 sdata->vif.netdev_features = local->hw.netdev_features;
72d78728 2184
b7ffbd7e
JB		 2185 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2186
79f5962b
JA		 2187 /* MTU range is normally 256 - 2304, where the upper limit is
2188 * the maximum MSDU size. Monitor interfaces send and receive
2189 * MPDU and A-MSDU frames which may be much larger so we do
2190 * not impose an upper limit in that case.
2191 */
9c22b4a3 2192 ndev->min_mtu = 256;
79f5962b
JA		 2193 if (type == NL80211_IFTYPE_MONITOR)
2194 ndev->max_mtu = 0;
2195 else
2196 ndev->max_mtu = local->hw.max_mtu;
9c22b4a3 2197
2fe8ef10 2198 ret = cfg80211_register_netdevice(ndev);
f142c6b9 2199 if (ret) {
cf124db5 2200 free_netdev(ndev);
f142c6b9
JB		 2201 return ret;
2202 }
2203 }
f0706e82 2204
c771c9d8 2205 mutex_lock(&local->iflist_mtx);
79010420 2206 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 2207 mutex_unlock(&local->iflist_mtx);
79010420 2208
84efbb84
JB		 2209 if (new_wdev)
2210 *new_wdev = &sdata->wdev;
f0706e82 2211
f0706e82 2212 return 0;
f0706e82
JB		 2213}
2214
f698d856 2215void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 2216{
f0706e82 2217 ASSERT_RTNL();
11a843b7 2218
c771c9d8 2219 mutex_lock(&sdata->local->iflist_mtx);
75636525 2220 list_del_rcu(&sdata->list);
c771c9d8
JB		 2221 mutex_unlock(&sdata->local->iflist_mtx);
2222
f1267cf3
BP		 2223 if (sdata->vif.txq)
2224 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2225
75636525 2226 synchronize_rcu();
f142c6b9 2227
2fe8ef10
JB		 2228 cfg80211_unregister_wdev(&sdata->wdev);
2229
2230 if (!sdata->dev) {
835112b2 2231 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 2232 kfree(sdata);
2233 }
2234}
2235
2236void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2237{
2238 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2239 return;
2240 ieee80211_do_stop(sdata, true);
f0706e82
JB		 2241}
2242
75636525 2243void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 2244{
75636525 2245 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 2246 LIST_HEAD(unreg_list);
f142c6b9 2247 LIST_HEAD(wdev_list);
f0706e82
JB		 2248
2249 ASSERT_RTNL();
2250
d8d9008c
JB		 2251 /* Before destroying the interfaces, make sure they're all stopped so
2252 * that the hardware is stopped. Otherwise, the driver might still be
2253 * iterating the interfaces during the shutdown, e.g. from a worker
2254 * or from RX processing or similar, and if it does so (using atomic
2255 * iteration) while we're manipulating the list, the iteration will
2256 * crash.
2257 *
2258 * After this, the hardware should be stopped and the driver should
2259 * have stopped all of its activities, so that we can do RCU-unaware
2260 * manipulations of the interface list below.
c8aa22db 2261 */
d8d9008c
JB		 2262 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2263
2264 WARN(local->open_count, "%s: open count remains %d\n",
2265 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 2266
a50e5fb8
SS		 2267 ieee80211_txq_teardown_flows(local);
2268
efe117ab 2269 mutex_lock(&local->iflist_mtx);
75636525
JB		 2270 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2271 list_del(&sdata->list);
c771c9d8 2272
f142c6b9
JB		 2273 if (sdata->dev)
2274 unregister_netdevice_queue(sdata->dev, &unreg_list);
2275 else
2276 list_add(&sdata->list, &wdev_list);
f0706e82 2277 }
efe117ab 2278 mutex_unlock(&local->iflist_mtx);
a05829a7 2279
efe117ab 2280 unregister_netdevice_many(&unreg_list);
f142c6b9 2281
a05829a7 2282 wiphy_lock(local->hw.wiphy);
f142c6b9
JB		 2283 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2284 list_del(&sdata->list);
2285 cfg80211_unregister_wdev(&sdata->wdev);
2286 kfree(sdata);
2287 }
a05829a7 2288 wiphy_unlock(local->hw.wiphy);
f0706e82 2289}
5cff20e6 2290
47846c9b 2291static int netdev_notify(struct notifier_block *nb,
351638e7 2292 unsigned long state, void *ptr)
47846c9b 2293{
351638e7 2294 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 2295 struct ieee80211_sub_if_data *sdata;
2296
2297 if (state != NETDEV_CHANGENAME)
8bd811aa 2298 return NOTIFY_DONE;
47846c9b
JB		 2299
2300 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 2301 return NOTIFY_DONE;
47846c9b
JB		 2302
2303 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2304 return NOTIFY_DONE;
47846c9b
JB		 2305
2306 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2307 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2308 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2309
2310 return NOTIFY_OK;
47846c9b
JB		 2311}
2312
2313static struct notifier_block mac80211_netdev_notifier = {
2314 .notifier_call = netdev_notify,
2315};
2316
2317int ieee80211_iface_init(void)
2318{
2319 return register_netdevice_notifier(&mac80211_netdev_notifier);
2320}
2321
2322void ieee80211_iface_exit(void)
2323{
2324 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2325}
72f15d53
MB		 2326
2327void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2328{
2329 if (sdata->vif.type == NL80211_IFTYPE_AP)
2330 atomic_inc(&sdata->u.ap.num_mcast_sta);
2331 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2332 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2333}
2334
2335void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2336{
2337 if (sdata->vif.type == NL80211_IFTYPE_AP)
2338 atomic_dec(&sdata->u.ap.num_mcast_sta);
2339 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2340 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2341}
Linux 6.x block layer and io_uring tree(s)