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d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
f0706e82 2/*
c5d54fbf 3 * Interface handling
0d143fe1 4 *
f0706e82
JB		 5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 9 * Copyright 2013-2014 Intel Mobile Communications GmbH
d2941df8 10 * Copyright (c) 2016 Intel Deutschland GmbH
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
AE		 45static void ieee80211_iface_work(struct work_struct *work);
46
1ea6f9c0
JB		 47bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
48{
49 struct ieee80211_chanctx_conf *chanctx_conf;
50 int power;
51
52 rcu_read_lock();
53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
54 if (!chanctx_conf) {
55 rcu_read_unlock();
56 return false;
57 }
58
0430c883 59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 60 rcu_read_unlock();
61
62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->user_power_level);
64
65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->ap_power_level);
67
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
71 return true;
72 }
73
74 return false;
75}
76
db82d8a9
LB		 77void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
78 bool update_bss)
1ea6f9c0 79{
5ad11b50
EG		 80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
83}
c771c9d8 84
62a40a15 85static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 86{
87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
88 return 0;
89
90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
91 return IEEE80211_CONF_CHANGE_IDLE;
92}
93
62a40a15 94static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 95{
96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
97 return 0;
98
3b24f4c6 99 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 100
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
103}
104
62a40a15
JB		 105static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
106 bool force_active)
cc45ae54 107{
1d5e1266 108 bool working, scanning, active;
cc45ae54 109 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 110
cc45ae54
JB		 111 lockdep_assert_held(&local->mtx);
112
62a40a15
JB		 113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
115 local->monitors;
cc45ae54 116
1d5e1266
JB		 117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
cc45ae54 119
f1e3e051
JB		 120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 122
cc45ae54
JB		 123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 else
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127
fd0f979a 128 if (active)
cc45ae54
JB		 129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 else
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134
fd0f979a 135 if (working || scanning || active)
62a40a15
JB		 136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
138}
139
140u32 ieee80211_idle_off(struct ieee80211_local *local)
141{
142 return __ieee80211_recalc_idle(local, true);
143}
144
145void ieee80211_recalc_idle(struct ieee80211_local *local)
146{
147 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 148 if (change)
149 ieee80211_hw_config(local, change);
cc45ae54
JB		 150}
151
3899ba90 152static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 153 bool check_dup)
478622e8 154{
ac20976d
HS		 155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
478622e8
HS		 157 u64 new, mask, tmp;
158 u8 *m;
159 int ret = 0;
160
161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
162 return 0;
163
164 m = addr;
165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
168
169 m = local->hw.wiphy->addr_mask;
170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
173
31eba5bc
FF		 174 if (!check_dup)
175 return ret;
478622e8
HS		 176
177 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 178 list_for_each_entry(iter, &local->interfaces, list) {
179 if (iter == sdata)
478622e8
HS		 180 continue;
181
3899ba90 182 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 184 continue;
185
ac20976d 186 m = iter->vif.addr;
478622e8
HS		 187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
190
191 if ((new & ~mask) != (tmp & ~mask)) {
192 ret = -EINVAL;
193 break;
194 }
195 }
196 mutex_unlock(&local->iflist_mtx);
197
198 return ret;
199}
200
47846c9b
JB		 201static int ieee80211_change_mac(struct net_device *dev, void *addr)
202{
203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 204 struct sockaddr *sa = addr;
31eba5bc 205 bool check_dup = true;
47846c9b
JB		 206 int ret;
207
9607e6b6 208 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 209 return -EBUSY;
210
31eba5bc 211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 213 check_dup = false;
214
3899ba90 215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 216 if (ret)
217 return ret;
218
fc5f7577 219 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 220
221 if (ret == 0)
fc5f7577 222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 223
224 return ret;
225}
226
0d143fe1
JB		 227static inline int identical_mac_addr_allowed(int type1, int type2)
228{
229 return type1 == NL80211_IFTYPE_MONITOR ||
230 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 231 type1 == NL80211_IFTYPE_P2P_DEVICE ||
232 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
234 (type1 == NL80211_IFTYPE_WDS &&
235 (type2 == NL80211_IFTYPE_WDS ||
236 type2 == NL80211_IFTYPE_AP)) ||
237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
238 (type1 == NL80211_IFTYPE_AP_VLAN &&
239 (type2 == NL80211_IFTYPE_AP ||
240 type2 == NL80211_IFTYPE_AP_VLAN));
241}
242
87490f6d
JB		 243static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
244 enum nl80211_iftype iftype)
0d143fe1 245{
b4a4bf5d 246 struct ieee80211_local *local = sdata->local;
87490f6d 247 struct ieee80211_sub_if_data *nsdata;
b6a55015 248 int ret;
0d143fe1 249
87490f6d 250 ASSERT_RTNL();
0d143fe1
JB		 251
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 255 /*
256 * Only OCB and monitor mode may coexist
257 */
258 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
260 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
261 nsdata->vif.type == NL80211_IFTYPE_OCB))
262 return -EBUSY;
263
0d143fe1
JB		 264 /*
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
268 *
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
273 */
87490f6d 274 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
276 return -EBUSY;
73da7d5b
SW		 277 /*
278 * will not add another interface while any channel
279 * switch is active.
280 */
281 if (nsdata->vif.csa_active)
282 return -EBUSY;
0d143fe1
JB		 283
284 /*
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
287 */
371a255e
JB		 288 if (!ether_addr_equal(sdata->vif.addr,
289 nsdata->vif.addr))
0d143fe1
JB		 290 continue;
291
292 /*
293 * check whether it may have the same address
294 */
87490f6d 295 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 296 nsdata->vif.type))
297 return -ENOTUNIQ;
298
299 /*
300 * can only add VLANs to enabled APs
301 */
87490f6d 302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
305 }
306 }
307
b6a55015
LC		 308 mutex_lock(&local->chanctx_mtx);
309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
310 mutex_unlock(&local->chanctx_mtx);
311 return ret;
87490f6d
JB		 312}
313
a9865538
JB		 314static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
315 enum nl80211_iftype iftype)
3a25a8c8
JB		 316{
317 int n_queues = sdata->local->hw.queues;
318 int i;
319
708d50ed
AB		 320 if (iftype == NL80211_IFTYPE_NAN)
321 return 0;
322
a9865538 323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 324 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
326 IEEE80211_INVAL_HW_QUEUE))
327 return -EINVAL;
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
329 n_queues))
330 return -EINVAL;
331 }
3a25a8c8
JB		 332 }
333
a9865538
JB		 334 if ((iftype != NL80211_IFTYPE_AP &&
335 iftype != NL80211_IFTYPE_P2P_GO &&
336 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
339 return 0;
340 }
341
342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
343 return -EINVAL;
344
345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
346 return -EINVAL;
347
348 return 0;
349}
350
4b7afb52 351static int ieee80211_open(struct net_device *dev)
6aea26ce 352{
4b7afb52
FF		 353 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
354 int err;
355
356 /* fail early if user set an invalid address */
357 if (!is_valid_ether_addr(dev->dev_addr))
358 return -EADDRNOTAVAIL;
359
360 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
361 if (err)
362 return err;
363
364 return ieee80211_do_open(&sdata->wdev, true);
6aea26ce
FF		 365}
366
4b7afb52
FF		 367static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
368 bool going_down)
6aea26ce
FF		 369{
370 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 371 unsigned long flags;
372 struct sk_buff *skb, *tmp;
373 u32 hw_reconf_flags = 0;
374 int i, flushed;
375 struct ps_data *ps;
376 struct cfg80211_chan_def chandef;
377 bool cancel_scan;
378 struct cfg80211_nan_func *func;
6aea26ce 379
4b7afb52 380 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
6aea26ce 381
4b7afb52
FF		 382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
383 if (cancel_scan)
384 ieee80211_scan_cancel(local);
6aea26ce 385
4b7afb52
FF		 386 /*
387 * Stop TX on this interface first.
388 */
389 if (sdata->dev)
390 netif_tx_stop_all_queues(sdata->dev);
6aea26ce 391
4b7afb52 392 ieee80211_roc_purge(local, sdata);
6aea26ce 393
4b7afb52
FF		 394 switch (sdata->vif.type) {
395 case NL80211_IFTYPE_STATION:
396 ieee80211_mgd_stop(sdata);
397 break;
398 case NL80211_IFTYPE_ADHOC:
399 ieee80211_ibss_stop(sdata);
400 break;
401 case NL80211_IFTYPE_MONITOR:
402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
403 break;
404 list_del_rcu(&sdata->u.mntr.list);
405 break;
406 default:
407 break;
408 }
6aea26ce 409
4b7afb52
FF		 410 /*
411 * Remove all stations associated with this interface.
412 *
413 * This must be done before calling ops->remove_interface()
414 * because otherwise we can later invoke ops->sta_notify()
415 * whenever the STAs are removed, and that invalidates driver
416 * assumptions about always getting a vif pointer that is valid
417 * (because if we remove a STA after ops->remove_interface()
418 * the driver will have removed the vif info already!)
419 *
420 * In WDS mode a station must exist here and be flushed, for
421 * AP_VLANs stations may exist since there's nothing else that
422 * would have removed them, but in other modes there shouldn't
423 * be any stations.
424 */
425 flushed = sta_info_flush(sdata);
426 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
427 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
428 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
6aea26ce 429
4b7afb52
FF		 430 /* don't count this interface for allmulti while it is down */
431 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
432 atomic_dec(&local->iff_allmultis);
6aea26ce 433
4b7afb52
FF		 434 if (sdata->vif.type == NL80211_IFTYPE_AP) {
435 local->fif_pspoll--;
436 local->fif_probe_req--;
437 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
438 local->fif_probe_req--;
6aea26ce
FF		 439 }
440
4b7afb52
FF		 441 if (sdata->dev) {
442 netif_addr_lock_bh(sdata->dev);
443 spin_lock_bh(&local->filter_lock);
444 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
445 sdata->dev->addr_len);
446 spin_unlock_bh(&local->filter_lock);
447 netif_addr_unlock_bh(sdata->dev);
6aea26ce 448 }
6aea26ce 449
4b7afb52
FF		 450 del_timer_sync(&local->dynamic_ps_timer);
451 cancel_work_sync(&local->dynamic_ps_enable_work);
6aea26ce 452
4b7afb52
FF		 453 cancel_work_sync(&sdata->recalc_smps);
454 sdata_lock(sdata);
455 mutex_lock(&local->mtx);
456 sdata->vif.csa_active = false;
457 if (sdata->vif.type == NL80211_IFTYPE_STATION)
458 sdata->u.mgd.csa_waiting_bcn = false;
459 if (sdata->csa_block_tx) {
460 ieee80211_wake_vif_queues(local, sdata,
461 IEEE80211_QUEUE_STOP_REASON_CSA);
462 sdata->csa_block_tx = false;
6aea26ce 463 }
4b7afb52
FF		 464 mutex_unlock(&local->mtx);
465 sdata_unlock(sdata);
6aea26ce 466
4b7afb52 467 cancel_work_sync(&sdata->csa_finalize_work);
85416a4f 468
4b7afb52 469 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
85416a4f 470
4b7afb52
FF		 471 if (sdata->wdev.cac_started) {
472 chandef = sdata->vif.bss_conf.chandef;
473 WARN_ON(local->suspended);
474 mutex_lock(&local->mtx);
475 ieee80211_vif_release_channel(sdata);
476 mutex_unlock(&local->mtx);
477 cfg80211_cac_event(sdata->dev, &chandef,
478 NL80211_RADAR_CAC_ABORTED,
479 GFP_KERNEL);
480 }
85416a4f 481
4b7afb52
FF		 482 /* APs need special treatment */
483 if (sdata->vif.type == NL80211_IFTYPE_AP) {
484 struct ieee80211_sub_if_data *vlan, *tmpsdata;
85416a4f 485
4b7afb52
FF		 486 /* down all dependent devices, that is VLANs */
487 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
488 u.vlan.list)
489 dev_close(vlan->dev);
490 WARN_ON(!list_empty(&sdata->u.ap.vlans));
491 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
492 /* remove all packets in parent bc_buf pointing to this dev */
493 ps = &sdata->bss->ps;
3a25a8c8 494
4b7afb52
FF		 495 spin_lock_irqsave(&ps->bc_buf.lock, flags);
496 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
497 if (skb->dev == sdata->dev) {
498 __skb_unlink(skb, &ps->bc_buf);
499 local->total_ps_buffered--;
500 ieee80211_free_txskb(&local->hw, skb);
501 }
502 }
503 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
3a25a8c8 504 }
3a25a8c8 505
4b7afb52
FF		 506 if (going_down)
507 local->open_count--;
4b6f1dd6 508
4b7afb52
FF		 509 switch (sdata->vif.type) {
510 case NL80211_IFTYPE_AP_VLAN:
511 mutex_lock(&local->mtx);
512 list_del(&sdata->u.vlan.list);
513 mutex_unlock(&local->mtx);
514 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
515 /* see comment in the default case below */
516 ieee80211_free_keys(sdata, true);
517 /* no need to tell driver */
518 break;
519 case NL80211_IFTYPE_MONITOR:
520 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
521 local->cooked_mntrs--;
522 break;
523 }
685fb72b 524
4b7afb52
FF		 525 local->monitors--;
526 if (local->monitors == 0) {
527 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
528 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
529 }
4b6f1dd6 530
4b7afb52
FF		 531 ieee80211_adjust_monitor_flags(sdata, -1);
532 break;
533 case NL80211_IFTYPE_NAN:
534 /* clean all the functions */
535 spin_lock_bh(&sdata->u.nan.func_lock);
4b6f1dd6 536
4b7afb52
FF		 537 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
538 idr_remove(&sdata->u.nan.function_inst_ids, i);
539 cfg80211_free_nan_func(func);
540 }
541 idr_destroy(&sdata->u.nan.function_inst_ids);
3a25a8c8 542
4b7afb52
FF		 543 spin_unlock_bh(&sdata->u.nan.func_lock);
544 break;
545 case NL80211_IFTYPE_P2P_DEVICE:
546 /* relies on synchronize_rcu() below */
547 RCU_INIT_POINTER(local->p2p_sdata, NULL);
548 fallthrough;
549 default:
550 cancel_work_sync(&sdata->work);
551 /*
552 * When we get here, the interface is marked down.
553 * Free the remaining keys, if there are any
554 * (which can happen in AP mode if userspace sets
555 * keys before the interface is operating, and maybe
556 * also in WDS mode)
557 *
558 * Force the key freeing to always synchronize_net()
559 * to wait for the RX path in case it is using this
560 * interface enqueuing frames at this very time on
561 * another CPU.
562 */
563 ieee80211_free_keys(sdata, true);
564 skb_queue_purge(&sdata->skb_queue);
4b6f1dd6
JB		 565 }
566
4b7afb52
FF		 567 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
568 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
569 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
570 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
571 if (info->control.vif == &sdata->vif) {
572 __skb_unlink(skb, &local->pending[i]);
573 ieee80211_free_txskb(&local->hw, skb);
574 }
575 }
3a25a8c8 576 }
4b7afb52 577 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
3a25a8c8 578
4b7afb52
FF		 579 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
580 ieee80211_txq_remove_vlan(local, sdata);
fab57a6c 581
4b7afb52
FF		 582 sdata->bss = NULL;
583
584 if (local->open_count == 0)
585 ieee80211_clear_tx_pending(local);
586
587 sdata->vif.bss_conf.beacon_int = 0;
588
589 /*
590 * If the interface goes down while suspended, presumably because
591 * the device was unplugged and that happens before our resume,
592 * then the driver is already unconfigured and the remainder of
593 * this function isn't needed.
594 * XXX: what about WoWLAN? If the device has software state, e.g.
595 * memory allocated, it might expect teardown commands from
596 * mac80211 here?
597 */
598 if (local->suspended) {
599 WARN_ON(local->wowlan);
600 WARN_ON(rtnl_dereference(local->monitor_sdata));
601 return;
55de908a
JB		 602 }
603
4b7afb52
FF		 604 switch (sdata->vif.type) {
605 case NL80211_IFTYPE_AP_VLAN:
606 break;
607 case NL80211_IFTYPE_MONITOR:
608 if (local->monitors == 0)
609 ieee80211_del_virtual_monitor(local);
42bd20d9 610
4b7afb52
FF		 611 mutex_lock(&local->mtx);
612 ieee80211_recalc_idle(local);
613 mutex_unlock(&local->mtx);
4b6f1dd6 614
4b7afb52
FF		 615 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
616 break;
4b6f1dd6 617
4b7afb52
FF		 618 fallthrough;
619 default:
620 if (going_down)
621 drv_remove_interface(local, sdata);
622 }
4b6f1dd6 623
4b7afb52 624 ieee80211_recalc_ps(local);
8b305780 625
4b7afb52
FF		 626 if (cancel_scan)
627 flush_delayed_work(&local->scan_work);
4b6f1dd6 628
4b7afb52
FF		 629 if (local->open_count == 0) {
630 ieee80211_stop_device(local);
631
632 /* no reconfiguring after stop! */
8b305780
JB		 633 return;
634 }
4b6f1dd6 635
4b7afb52
FF		 636 /* do after stop to avoid reconfiguring when we stop anyway */
637 ieee80211_configure_filter(local);
638 ieee80211_hw_config(local, hw_reconf_flags);
8b305780 639
4b7afb52
FF		 640 if (local->monitors == local->open_count)
641 ieee80211_add_virtual_monitor(local);
642}
4b6f1dd6 643
4b7afb52
FF		 644static int ieee80211_stop(struct net_device *dev)
645{
646 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
55de908a 647
4b7afb52 648 ieee80211_do_stop(sdata, true);
4b6f1dd6 649
4b7afb52 650 return 0;
4b6f1dd6
JB		 651}
652
4b7afb52 653static void ieee80211_set_multicast_list(struct net_device *dev)
87490f6d 654{
4b7afb52 655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
87490f6d 656 struct ieee80211_local *local = sdata->local;
4b7afb52 657 int allmulti, sdata_allmulti;
87490f6d 658
4b7afb52
FF		 659 allmulti = !!(dev->flags & IFF_ALLMULTI);
660 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
665c93a9 661
4b7afb52
FF		 662 if (allmulti != sdata_allmulti) {
663 if (dev->flags & IFF_ALLMULTI)
664 atomic_inc(&local->iff_allmultis);
665 else
666 atomic_dec(&local->iff_allmultis);
667 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
668 }
665c93a9 669
4b7afb52
FF		 670 spin_lock_bh(&local->filter_lock);
671 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
672 spin_unlock_bh(&local->filter_lock);
673 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
674}
665c93a9 675
4b7afb52
FF		 676/*
677 * Called when the netdev is removed or, by the code below, before
678 * the interface type changes.
679 */
680static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
681{
682 int i;
f9dca80b 683
4b7afb52
FF		 684 /* free extra data */
685 ieee80211_free_keys(sdata, false);
f9dca80b 686
4b7afb52 687 ieee80211_debugfs_remove_netdev(sdata);
0d143fe1 688
4b7afb52
FF		 689 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
690 __skb_queue_purge(&sdata->fragments[i].skb_list);
691 sdata->fragment_next = 0;
0d143fe1 692
4b7afb52
FF		 693 if (ieee80211_vif_is_mesh(&sdata->vif))
694 ieee80211_mesh_teardown_sdata(sdata);
695}
0d143fe1 696
4b7afb52
FF		 697static void ieee80211_uninit(struct net_device *dev)
698{
699 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
700}
075e0847 701
4b7afb52
FF		 702static u16 ieee80211_netdev_select_queue(struct net_device *dev,
703 struct sk_buff *skb,
704 struct net_device *sb_dev)
705{
706 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
707}
0d143fe1 708
4b7afb52
FF		 709static void
710ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
711{
6401297e 712 dev_fetch_sw_netstats(stats, dev->tstats);
4b7afb52 713}
e3b90ca2 714
4b7afb52
FF		 715static const struct net_device_ops ieee80211_dataif_ops = {
716 .ndo_open = ieee80211_open,
717 .ndo_stop = ieee80211_stop,
718 .ndo_uninit = ieee80211_uninit,
719 .ndo_start_xmit = ieee80211_subif_start_xmit,
720 .ndo_set_rx_mode = ieee80211_set_multicast_list,
721 .ndo_set_mac_address = ieee80211_change_mac,
722 .ndo_select_queue = ieee80211_netdev_select_queue,
723 .ndo_get_stats64 = ieee80211_get_stats64,
724};
e3b90ca2 725
4b7afb52
FF		 726static u16 ieee80211_monitor_select_queue(struct net_device *dev,
727 struct sk_buff *skb,
728 struct net_device *sb_dev)
729{
730 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
731 struct ieee80211_local *local = sdata->local;
732 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
733 struct ieee80211_hdr *hdr;
734 int len_rthdr;
90e8f58d 735
4b7afb52
FF		 736 if (local->hw.queues < IEEE80211_NUM_ACS)
737 return 0;
0d143fe1 738
4b7afb52
FF		 739 /* reset flags and info before parsing radiotap header */
740 memset(info, 0, sizeof(*info));
59034591 741
4b7afb52
FF		 742 if (!ieee80211_parse_tx_radiotap(skb, dev))
743 return 0; /* doesn't matter, frame will be dropped */
0d143fe1 744
4b7afb52
FF		 745 len_rthdr = ieee80211_get_radiotap_len(skb->data);
746 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
747 if (skb->len < len_rthdr + 2 ||
748 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
749 return 0; /* doesn't matter, frame will be dropped */
2d2080c3 750
4b7afb52
FF		 751 return ieee80211_select_queue_80211(sdata, skb, hdr);
752}
0d143fe1 753
4b7afb52
FF		 754static const struct net_device_ops ieee80211_monitorif_ops = {
755 .ndo_open = ieee80211_open,
756 .ndo_stop = ieee80211_stop,
757 .ndo_uninit = ieee80211_uninit,
758 .ndo_start_xmit = ieee80211_monitor_start_xmit,
759 .ndo_set_rx_mode = ieee80211_set_multicast_list,
760 .ndo_set_mac_address = ieee80211_change_mac,
761 .ndo_select_queue = ieee80211_monitor_select_queue,
762 .ndo_get_stats64 = ieee80211_get_stats64,
763};
0d143fe1 764
4b7afb52
FF		 765static const struct net_device_ops ieee80211_dataif_8023_ops = {
766 .ndo_open = ieee80211_open,
767 .ndo_stop = ieee80211_stop,
768 .ndo_uninit = ieee80211_uninit,
769 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
770 .ndo_set_rx_mode = ieee80211_set_multicast_list,
771 .ndo_set_mac_address = ieee80211_change_mac,
772 .ndo_select_queue = ieee80211_netdev_select_queue,
773 .ndo_get_stats64 = ieee80211_get_stats64,
774};
1be7fe8d 775
4b7afb52
FF		 776static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
777{
778 switch (iftype) {
779 /* P2P GO and client are mapped to AP/STATION types */
780 case NL80211_IFTYPE_AP:
781 case NL80211_IFTYPE_STATION:
782 return true;
f64331d5 783 default:
4b7afb52 784 return false;
0d143fe1 785 }
4b7afb52 786}
0d143fe1 787
4b7afb52
FF		 788static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
789{
790 struct ieee80211_local *local = sdata->local;
791 u32 flags;
965bedad 792
4b7afb52 793 flags = sdata->vif.offload_flags;
2b730daa 794
4b7afb52
FF		 795 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
796 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
797 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 798
4b7afb52
FF		 799 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
800 local->hw.wiphy->frag_threshold != (u32)-1)
801 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 802
4b7afb52
FF		 803 if (local->monitors)
804 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
805 } else {
806 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 807 }
0d143fe1 808
4b7afb52
FF		 809 if (sdata->vif.offload_flags == flags)
810 return false;
811
812 sdata->vif.offload_flags = flags;
813 return true;
0d143fe1
JB		 814}
815
4b7afb52 816static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
0d143fe1 817{
4b7afb52
FF		 818 struct ieee80211_local *local = sdata->local;
819 struct ieee80211_sub_if_data *bss = sdata;
820 bool enabled;
34d4bc4d 821
4b7afb52
FF		 822 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
823 if (!sdata->bss)
824 return;
34d4bc4d 825
4b7afb52
FF		 826 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
827 }
34d4bc4d 828
4b7afb52
FF		 829 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
830 !ieee80211_iftype_supports_encap_offload(bss->vif.type))
831 return;
34d4bc4d 832
4b7afb52
FF		 833 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
834 if (sdata->wdev.use_4addr &&
835 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
836 enabled = false;
0d143fe1 837
4b7afb52
FF		 838 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
839 &ieee80211_dataif_ops;
840}
c29acf20 841
4b7afb52
FF		 842static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
843{
844 struct ieee80211_local *local = sdata->local;
845 struct ieee80211_sub_if_data *vsdata;
352ffad6 846
4b7afb52
FF		 847 if (ieee80211_set_sdata_offload_flags(sdata)) {
848 drv_update_vif_offload(local, sdata);
849 ieee80211_set_vif_encap_ops(sdata);
850 }
0d143fe1 851
4b7afb52
FF		 852 list_for_each_entry(vsdata, &local->interfaces, list) {
853 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
854 vsdata->bss != &sdata->u.ap)
855 continue;
af6b6374 856
4b7afb52 857 ieee80211_set_vif_encap_ops(vsdata);
8ffcc704 858 }
4b7afb52 859}
cd7760e6 860
4b7afb52
FF		 861void ieee80211_recalc_offload(struct ieee80211_local *local)
862{
863 struct ieee80211_sub_if_data *sdata;
0d143fe1 864
4b7afb52
FF		 865 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
866 return;
0d143fe1 867
4b7afb52 868 mutex_lock(&local->iflist_mtx);
e3b90ca2 869
4b7afb52
FF		 870 list_for_each_entry(sdata, &local->interfaces, list) {
871 if (!ieee80211_sdata_running(sdata))
872 continue;
873
874 ieee80211_recalc_sdata_offload(sdata);
f142c6b9 875 }
3ac64bee 876
4b7afb52
FF		 877 mutex_unlock(&local->iflist_mtx);
878}
0d143fe1 879
4b7afb52
FF		 880void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
881 const int offset)
882{
883 struct ieee80211_local *local = sdata->local;
884 u32 flags = sdata->u.mntr.flags;
59af6928 885
4b7afb52
FF		 886#define ADJUST(_f, _s) do { \
887 if (flags & MONITOR_FLAG_##_f) \
888 local->fif_##_s += offset; \
889 } while (0)
04ecd257 890
4b7afb52
FF		 891 ADJUST(FCSFAIL, fcsfail);
892 ADJUST(PLCPFAIL, plcpfail);
893 ADJUST(CONTROL, control);
894 ADJUST(CONTROL, pspoll);
895 ADJUST(OTHER_BSS, other_bss);
164eb02d 896
4b7afb52
FF		 897#undef ADJUST
898}
899
900static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
901{
902 struct ieee80211_local *local = sdata->local;
903 int i;
904
905 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
906 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
907 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
908 else if (local->hw.queues >= IEEE80211_NUM_ACS)
909 sdata->vif.hw_queue[i] = i;
910 else
911 sdata->vif.hw_queue[i] = 0;
164eb02d 912 }
4b7afb52
FF		 913 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
914}
164eb02d 915
4b7afb52
FF		 916int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
917{
918 struct ieee80211_sub_if_data *sdata;
919 int ret;
0d143fe1 920
4b7afb52
FF		 921 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
922 return 0;
397a7a24 923
4b7afb52 924 ASSERT_RTNL();
0d143fe1 925
4b7afb52
FF		 926 if (local->monitor_sdata)
927 return 0;
0d143fe1 928
4b7afb52
FF		 929 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
930 if (!sdata)
931 return -ENOMEM;
0d143fe1 932
4b7afb52
FF		 933 /* set up data */
934 sdata->local = local;
935 sdata->vif.type = NL80211_IFTYPE_MONITOR;
936 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
937 wiphy_name(local->hw.wiphy));
938 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
0d143fe1 939
4b7afb52 940 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
167e33f4 941
4b7afb52 942 ieee80211_set_default_queues(sdata);
167e33f4 943
4b7afb52
FF		 944 ret = drv_add_interface(local, sdata);
945 if (WARN_ON(ret)) {
946 /* ok .. stupid driver, it asked for this! */
947 kfree(sdata);
948 return ret;
949 }
950
951 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
952 if (ret) {
953 kfree(sdata);
954 return ret;
0d143fe1
JB		 955 }
956
4b7afb52
FF		 957 mutex_lock(&local->iflist_mtx);
958 rcu_assign_pointer(local->monitor_sdata, sdata);
959 mutex_unlock(&local->iflist_mtx);
960
961 mutex_lock(&local->mtx);
962 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
963 IEEE80211_CHANCTX_EXCLUSIVE);
964 mutex_unlock(&local->mtx);
965 if (ret) {
966 mutex_lock(&local->iflist_mtx);
967 RCU_INIT_POINTER(local->monitor_sdata, NULL);
968 mutex_unlock(&local->iflist_mtx);
969 synchronize_net();
970 drv_remove_interface(local, sdata);
971 kfree(sdata);
972 return ret;
5061b0c2 973 }
075e0847 974
4b7afb52
FF		 975 skb_queue_head_init(&sdata->skb_queue);
976 INIT_WORK(&sdata->work, ieee80211_iface_work);
53168215 977
4b7afb52
FF		 978 return 0;
979}
ba8c3d6f 980
4b7afb52
FF		 981void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
982{
983 struct ieee80211_sub_if_data *sdata;
b2c0958b 984
4b7afb52
FF		 985 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
986 return;
5c21e810 987
4b7afb52
FF		 988 ASSERT_RTNL();
989
990 mutex_lock(&local->iflist_mtx);
991
992 sdata = rcu_dereference_protected(local->monitor_sdata,
993 lockdep_is_held(&local->iflist_mtx));
994 if (!sdata) {
995 mutex_unlock(&local->iflist_mtx);
b2c0958b
JB		 996 return;
997 }
998
4b7afb52
FF		 999 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1000 mutex_unlock(&local->iflist_mtx);
1001
1002 synchronize_net();
1003
1004 mutex_lock(&local->mtx);
1005 ieee80211_vif_release_channel(sdata);
1006 mutex_unlock(&local->mtx);
1007
1008 drv_remove_interface(local, sdata);
1009
1010 kfree(sdata);
1011}
1012
1013/*
1014 * NOTE: Be very careful when changing this function, it must NOT return
1015 * an error on interface type changes that have been pre-checked, so most
1016 * checks should be in ieee80211_check_concurrent_iface.
1017 */
1018int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1019{
1020 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1021 struct net_device *dev = wdev->netdev;
1022 struct ieee80211_local *local = sdata->local;
1023 struct sta_info *sta;
1024 u32 changed = 0;
1025 int res;
1026 u32 hw_reconf_flags = 0;
1027
b2c0958b 1028 switch (sdata->vif.type) {
4b7afb52
FF		 1029 case NL80211_IFTYPE_WDS:
1030 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
1031 return -ENOLINK;
b2c0958b 1032 break;
4b7afb52
FF		 1033 case NL80211_IFTYPE_AP_VLAN: {
1034 struct ieee80211_sub_if_data *master;
1035
1036 if (!sdata->bss)
1037 return -ENOLINK;
b2c0958b
JB		 1038
1039 mutex_lock(&local->mtx);
4b7afb52 1040 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
b2c0958b 1041 mutex_unlock(&local->mtx);
31eba5bc 1042
4b7afb52
FF		 1043 master = container_of(sdata->bss,
1044 struct ieee80211_sub_if_data, u.ap);
1045 sdata->control_port_protocol =
1046 master->control_port_protocol;
1047 sdata->control_port_no_encrypt =
1048 master->control_port_no_encrypt;
1049 sdata->control_port_over_nl80211 =
1050 master->control_port_over_nl80211;
1051 sdata->control_port_no_preauth =
1052 master->control_port_no_preauth;
1053 sdata->vif.cab_queue = master->vif.cab_queue;
1054 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1055 sizeof(sdata->vif.hw_queue));
1056 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
b2c0958b 1057
4b7afb52
FF		 1058 mutex_lock(&local->key_mtx);
1059 sdata->crypto_tx_tailroom_needed_cnt +=
1060 master->crypto_tx_tailroom_needed_cnt;
1061 mutex_unlock(&local->key_mtx);
b2c0958b 1062
4b7afb52
FF		 1063 break;
1064 }
1065 case NL80211_IFTYPE_AP:
1066 sdata->bss = &sdata->u.ap;
1067 break;
1068 case NL80211_IFTYPE_MESH_POINT:
1069 case NL80211_IFTYPE_STATION:
1070 case NL80211_IFTYPE_MONITOR:
1071 case NL80211_IFTYPE_ADHOC:
1072 case NL80211_IFTYPE_P2P_DEVICE:
1073 case NL80211_IFTYPE_OCB:
1074 case NL80211_IFTYPE_NAN:
1075 /* no special treatment */
1076 break;
1077 case NL80211_IFTYPE_UNSPECIFIED:
1078 case NUM_NL80211_IFTYPES:
1079 case NL80211_IFTYPE_P2P_CLIENT:
1080 case NL80211_IFTYPE_P2P_GO:
1081 /* cannot happen */
1082 WARN_ON(1);
1083 break;
1084 }
46238845 1085
b2c0958b 1086 if (local->open_count == 0) {
4b7afb52
FF		 1087 res = drv_start(local);
1088 if (res)
1089 goto err_del_bss;
1090 /* we're brought up, everything changes */
1091 hw_reconf_flags = ~0;
1092 ieee80211_led_radio(local, true);
1093 ieee80211_mod_tpt_led_trig(local,
1094 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
b2c0958b
JB		 1095 }
1096
4b7afb52
FF		 1097 /*
1098 * Copy the hopefully now-present MAC address to
1099 * this interface, if it has the special null one.
1100 */
1101 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1102 memcpy(dev->dev_addr,
1103 local->hw.wiphy->perm_addr,
1104 ETH_ALEN);
1105 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
34d4bc4d 1106
4b7afb52
FF		 1107 if (!is_valid_ether_addr(dev->dev_addr)) {
1108 res = -EADDRNOTAVAIL;
1109 goto err_stop;
1110 }
1111 }
34d4bc4d 1112
4b7afb52
FF		 1113 switch (sdata->vif.type) {
1114 case NL80211_IFTYPE_AP_VLAN:
1115 /* no need to tell driver, but set carrier and chanctx */
1116 if (rtnl_dereference(sdata->bss->beacon)) {
1117 ieee80211_vif_vlan_copy_chanctx(sdata);
1118 netif_carrier_on(dev);
1119 ieee80211_set_vif_encap_ops(sdata);
1120 } else {
1121 netif_carrier_off(dev);
1122 }
1123 break;
1124 case NL80211_IFTYPE_MONITOR:
1125 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1126 local->cooked_mntrs++;
1127 break;
1128 }
5061b0c2 1129
4b7afb52
FF		 1130 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1131 res = drv_add_interface(local, sdata);
1132 if (res)
1133 goto err_stop;
1134 } else if (local->monitors == 0 && local->open_count == 0) {
1135 res = ieee80211_add_virtual_monitor(local);
1136 if (res)
1137 goto err_stop;
1138 }
0d143fe1 1139
4b7afb52
FF		 1140 /* must be before the call to ieee80211_configure_filter */
1141 local->monitors++;
1142 if (local->monitors == 1) {
1143 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1144 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1145 }
0d143fe1 1146
4b7afb52
FF		 1147 ieee80211_adjust_monitor_flags(sdata, 1);
1148 ieee80211_configure_filter(local);
1149 ieee80211_recalc_offload(local);
1150 mutex_lock(&local->mtx);
1151 ieee80211_recalc_idle(local);
1152 mutex_unlock(&local->mtx);
0d143fe1 1153
4b7afb52
FF		 1154 netif_carrier_on(dev);
1155 break;
1156 default:
1157 if (coming_up) {
1158 ieee80211_del_virtual_monitor(local);
1159 ieee80211_set_sdata_offload_flags(sdata);
0d143fe1 1160
4b7afb52
FF		 1161 res = drv_add_interface(local, sdata);
1162 if (res)
1163 goto err_stop;
0d143fe1 1164
4b7afb52
FF		 1165 ieee80211_set_vif_encap_ops(sdata);
1166 res = ieee80211_check_queues(sdata,
1167 ieee80211_vif_type_p2p(&sdata->vif));
1168 if (res)
1169 goto err_del_interface;
1170 }
f0706e82 1171
4b7afb52
FF		 1172 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1173 local->fif_pspoll++;
1174 local->fif_probe_req++;
75636525 1175
4b7afb52
FF		 1176 ieee80211_configure_filter(local);
1177 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1178 local->fif_probe_req++;
1179 }
aee14ceb 1180
4b7afb52
FF		 1181 if (sdata->vif.probe_req_reg)
1182 drv_config_iface_filter(local, sdata,
1183 FIF_PROBE_REQ,
1184 FIF_PROBE_REQ);
11a843b7 1185
4b7afb52
FF		 1186 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1187 sdata->vif.type != NL80211_IFTYPE_NAN)
1188 changed |= ieee80211_reset_erp_info(sdata);
1189 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 1190
4b7afb52
FF		 1191 switch (sdata->vif.type) {
1192 case NL80211_IFTYPE_STATION:
1193 case NL80211_IFTYPE_ADHOC:
1194 case NL80211_IFTYPE_AP:
1195 case NL80211_IFTYPE_MESH_POINT:
1196 case NL80211_IFTYPE_OCB:
1197 netif_carrier_off(dev);
1198 break;
1199 case NL80211_IFTYPE_WDS:
1200 case NL80211_IFTYPE_P2P_DEVICE:
1201 case NL80211_IFTYPE_NAN:
1202 break;
1203 default:
1204 /* not reached */
1205 WARN_ON(1);
1206 }
f142c6b9 1207
4b7afb52
FF		 1208 /*
1209 * Set default queue parameters so drivers don't
1210 * need to initialise the hardware if the hardware
1211 * doesn't start up with sane defaults.
1212 * Enable QoS for anything but station interfaces.
1213 */
1214 ieee80211_set_wmm_default(sdata, true,
1215 sdata->vif.type != NL80211_IFTYPE_STATION);
1216 }
cf0277e7 1217
4b7afb52 1218 set_bit(SDATA_STATE_RUNNING, &sdata->state);
5a490510 1219
4b7afb52
FF		 1220 switch (sdata->vif.type) {
1221 case NL80211_IFTYPE_WDS:
1222 /* Create STA entry for the WDS peer */
1223 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
1224 GFP_KERNEL);
1225 if (!sta) {
1226 res = -ENOMEM;
1227 goto err_del_interface;
1228 }
5a490510 1229
4b7afb52
FF		 1230 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1231 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1232 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
5a490510 1233
4b7afb52
FF		 1234 res = sta_info_insert(sta);
1235 if (res) {
1236 /* STA has been freed */
1237 goto err_del_interface;
1238 }
5a490510 1239
4b7afb52
FF		 1240 rate_control_rate_init(sta);
1241 netif_carrier_on(dev);
1242 break;
1243 case NL80211_IFTYPE_P2P_DEVICE:
1244 rcu_assign_pointer(local->p2p_sdata, sdata);
1245 break;
1246 case NL80211_IFTYPE_MONITOR:
1247 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1248 break;
1249 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1250 break;
1251 default:
1252 break;
5a490510 1253 }
5a490510 1254
4b7afb52
FF		 1255 /*
1256 * set_multicast_list will be invoked by the networking core
1257 * which will check whether any increments here were done in
1258 * error and sync them down to the hardware as filter flags.
1259 */
1260 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1261 atomic_inc(&local->iff_allmultis);
587e729e 1262
4b7afb52
FF		 1263 if (coming_up)
1264 local->open_count++;
cf0277e7 1265
4b7afb52
FF		 1266 if (hw_reconf_flags)
1267 ieee80211_hw_config(local, hw_reconf_flags);
cf0277e7 1268
4b7afb52 1269 ieee80211_recalc_ps(local);
cb17ed29 1270
4b7afb52
FF		 1271 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1272 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1273 local->ops->wake_tx_queue) {
1274 /* XXX: for AP_VLAN, actually track AP queues */
1275 if (dev)
1276 netif_tx_start_all_queues(dev);
1277 } else if (dev) {
1278 unsigned long flags;
1279 int n_acs = IEEE80211_NUM_ACS;
1280 int ac;
cf0277e7 1281
4b7afb52
FF		 1282 if (local->hw.queues < IEEE80211_NUM_ACS)
1283 n_acs = 1;
cf0277e7 1284
4b7afb52
FF		 1285 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1286 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1287 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1288 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1289 for (ac = 0; ac < n_acs; ac++) {
1290 int ac_queue = sdata->vif.hw_queue[ac];
cf0277e7 1291
4b7afb52
FF		 1292 if (local->queue_stop_reasons[ac_queue] == 0 &&
1293 skb_queue_empty(&local->pending[ac_queue]))
1294 netif_start_subqueue(dev, ac);
1295 }
1296 }
1297 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1298 }
587e729e 1299
4b7afb52
FF		 1300 return 0;
1301 err_del_interface:
1302 drv_remove_interface(local, sdata);
1303 err_stop:
1304 if (!local->open_count)
1305 drv_stop(local);
1306 err_del_bss:
1307 sdata->bss = NULL;
1308 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1309 mutex_lock(&local->mtx);
1310 list_del(&sdata->u.vlan.list);
1311 mutex_unlock(&local->mtx);
1312 }
1313 /* might already be clear but that doesn't matter */
1314 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1315 return res;
1316}
50ff477a 1317
5a490510
JB		 1318static void ieee80211_if_free(struct net_device *dev)
1319{
1320 free_percpu(dev->tstats);
5a490510
JB		 1321}
1322
587e729e
JB		 1323static void ieee80211_if_setup(struct net_device *dev)
1324{
1325 ether_setup(dev);
550fd08c 1326 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1327 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1328 dev->needs_free_netdev = true;
1329 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1330}
1331
80a83cfc
MK		 1332static void ieee80211_if_setup_no_queue(struct net_device *dev)
1333{
1334 ieee80211_if_setup(dev);
1335 dev->priv_flags |= IFF_NO_QUEUE;
1336}
1337
1fa57d01
JB		 1338static void ieee80211_iface_work(struct work_struct *work)
1339{
1340 struct ieee80211_sub_if_data *sdata =
1341 container_of(work, struct ieee80211_sub_if_data, work);
1342 struct ieee80211_local *local = sdata->local;
1343 struct sk_buff *skb;
344eec67 1344 struct sta_info *sta;
1fa57d01
JB		 1345
1346 if (!ieee80211_sdata_running(sdata))
1347 return;
1348
fc58c47e 1349 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1350 return;
1351
4afaff17 1352 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1353 return;
1354
1355 /* first process frames */
1356 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1357 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1358
699cb58c
JB		 1359 if (ieee80211_is_action(mgmt->frame_control) &&
1360 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1361 int len = skb->len;
bed7ee6e 1362
a93e3644 1363 mutex_lock(&local->sta_mtx);
875ae5f6 1364 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1365 if (sta) {
1366 switch (mgmt->u.action.u.addba_req.action_code) {
1367 case WLAN_ACTION_ADDBA_REQ:
1368 ieee80211_process_addba_request(
1369 local, sta, mgmt, len);
1370 break;
1371 case WLAN_ACTION_ADDBA_RESP:
1372 ieee80211_process_addba_resp(local, sta,
1373 mgmt, len);
1374 break;
1375 case WLAN_ACTION_DELBA:
1376 ieee80211_process_delba(sdata, sta,
1377 mgmt, len);
1378 break;
1379 default:
1380 WARN_ON(1);
1381 break;
1382 }
1383 }
a93e3644 1384 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1385 } else if (ieee80211_is_action(mgmt->frame_control) &&
1386 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1387 switch (mgmt->u.action.u.vht_group_notif.action_code) {
d2941df8
JB		 1388 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1389 struct ieee80211_rx_status *status;
1390 enum nl80211_band band;
1391 u8 opmode;
1392
1393 status = IEEE80211_SKB_RXCB(skb);
1394 band = status->band;
1395 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1396
1397 mutex_lock(&local->sta_mtx);
1398 sta = sta_info_get_bss(sdata, mgmt->sa);
1399
1400 if (sta)
1401 ieee80211_vht_handle_opmode(sdata, sta,
1402 opmode,
1403 band);
1404
1405 mutex_unlock(&local->sta_mtx);
1406 break;
1407 }
23a1f8d4
SS		 1408 case WLAN_VHT_ACTION_GROUPID_MGMT:
1409 ieee80211_process_mu_groups(sdata, mgmt);
1410 break;
1411 default:
1412 WARN_ON(1);
1413 break;
1414 }
09a740ce
TP		 1415 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1416 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1417 ieee80211_sta_rx_queued_ext(sdata, skb);
1418 else
1419 WARN_ON(1);
344eec67
JB		 1420 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1421 struct ieee80211_hdr *hdr = (void *)mgmt;
1422 /*
1423 * So the frame isn't mgmt, but frame_control
1424 * is at the right place anyway, of course, so
1425 * the if statement is correct.
1426 *
1427 * Warn if we have other data frame types here,
1428 * they must not get here.
1429 */
1430 WARN_ON(hdr->frame_control &
1431 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1432 WARN_ON(!(hdr->seq_ctrl &
1433 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1434 /*
1435 * This was a fragment of a frame, received while
1436 * a block-ack session was active. That cannot be
1437 * right, so terminate the session.
1438 */
a93e3644 1439 mutex_lock(&local->sta_mtx);
875ae5f6 1440 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67 1441 if (sta) {
a1f2ba04 1442 u16 tid = ieee80211_get_tid(hdr);
344eec67
JB		 1443
1444 __ieee80211_stop_rx_ba_session(
1445 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1446 WLAN_REASON_QSTA_REQUIRE_SETUP,
1447 true);
344eec67 1448 }
a93e3644 1449 mutex_unlock(&local->sta_mtx);
bed7ee6e 1450 } else switch (sdata->vif.type) {
1fa57d01
JB		 1451 case NL80211_IFTYPE_STATION:
1452 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1453 break;
1454 case NL80211_IFTYPE_ADHOC:
1455 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1456 break;
1457 case NL80211_IFTYPE_MESH_POINT:
1458 if (!ieee80211_vif_is_mesh(&sdata->vif))
1459 break;
1460 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1461 break;
1462 default:
1463 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1464 break;
1465 }
36b3a628
JB		 1466
1467 kfree_skb(skb);
1fa57d01
JB		 1468 }
1469
1470 /* then other type-dependent work */
1471 switch (sdata->vif.type) {
1472 case NL80211_IFTYPE_STATION:
1473 ieee80211_sta_work(sdata);
1474 break;
1475 case NL80211_IFTYPE_ADHOC:
1476 ieee80211_ibss_work(sdata);
1477 break;
1478 case NL80211_IFTYPE_MESH_POINT:
1479 if (!ieee80211_vif_is_mesh(&sdata->vif))
1480 break;
1481 ieee80211_mesh_work(sdata);
1482 break;
239281f8
RL		 1483 case NL80211_IFTYPE_OCB:
1484 ieee80211_ocb_work(sdata);
1485 break;
1fa57d01
JB		 1486 default:
1487 break;
1488 }
1489}
1490
04ecd257
JB		 1491static void ieee80211_recalc_smps_work(struct work_struct *work)
1492{
1493 struct ieee80211_sub_if_data *sdata =
1494 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1495
1496 ieee80211_recalc_smps(sdata);
1497}
1fa57d01 1498
75636525
JB		 1499/*
1500 * Helper function to initialise an interface to a specific type.
1501 */
1502static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1503 enum nl80211_iftype type)
f0706e82 1504{
239281f8
RL		 1505 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1506 0xff, 0xff, 0xff};
1507
75636525
JB		 1508 /* clear type-dependent union */
1509 memset(&sdata->u, 0, sizeof(sdata->u));
1510
1511 /* and set some type-dependent values */
1512 sdata->vif.type = type;
2ca27bcf 1513 sdata->vif.p2p = false;
60719ffd 1514 sdata->wdev.iftype = type;
75636525 1515
a621fa4d
JB		 1516 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1517 sdata->control_port_no_encrypt = false;
7f3f96ce
MT		 1518 sdata->control_port_over_nl80211 = false;
1519 sdata->control_port_no_preauth = false;
2475b1cc 1520 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1521 sdata->vif.bss_conf.idle = true;
db6d9e9e 1522 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
a621fa4d 1523
b53be792
SW		 1524 sdata->noack_map = 0;
1525
f142c6b9
JB		 1526 /* only monitor/p2p-device differ */
1527 if (sdata->dev) {
1528 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1529 sdata->dev->type = ARPHRD_ETHER;
1530 }
75636525 1531
35f20c14 1532 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1533 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1534 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1535 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1536 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1537 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1538
75636525 1539 switch (type) {
2ca27bcf
JB		 1540 case NL80211_IFTYPE_P2P_GO:
1541 type = NL80211_IFTYPE_AP;
1542 sdata->vif.type = type;
1543 sdata->vif.p2p = true;
fc0561dc 1544 fallthrough;
05c914fe 1545 case NL80211_IFTYPE_AP:
d012a605 1546 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1547 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1548 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1549 break;
2ca27bcf
JB		 1550 case NL80211_IFTYPE_P2P_CLIENT:
1551 type = NL80211_IFTYPE_STATION;
1552 sdata->vif.type = type;
1553 sdata->vif.p2p = true;
fc0561dc 1554 fallthrough;
05c914fe 1555 case NL80211_IFTYPE_STATION:
ad2d223a 1556 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1557 ieee80211_sta_setup_sdata(sdata);
472dbc45 1558 break;
6e0bd6c3 1559 case NL80211_IFTYPE_OCB:
239281f8
RL		 1560 sdata->vif.bss_conf.bssid = bssid_wildcard;
1561 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1562 break;
46900298 1563 case NL80211_IFTYPE_ADHOC:
ad2d223a 1564 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1565 ieee80211_ibss_setup_sdata(sdata);
1566 break;
05c914fe 1567 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1568 if (ieee80211_vif_is_mesh(&sdata->vif))
1569 ieee80211_mesh_init_sdata(sdata);
1570 break;
05c914fe 1571 case NL80211_IFTYPE_MONITOR:
75636525 1572 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1573 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1574 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1575 MONITOR_FLAG_OTHER_BSS;
1576 break;
05c914fe 1577 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1578 sdata->vif.bss_conf.bssid = NULL;
1579 break;
167e33f4
AB		 1580 case NL80211_IFTYPE_NAN:
1581 idr_init(&sdata->u.nan.function_inst_ids);
1582 spin_lock_init(&sdata->u.nan.func_lock);
1583 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1584 break;
05c914fe 1585 case NL80211_IFTYPE_AP_VLAN:
98104fde 1586 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1587 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1588 break;
05c914fe 1589 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1590 case NUM_NL80211_IFTYPES:
c7976f52 1591 WARN_ON(1);
75636525
JB		 1592 break;
1593 }
1594
1595 ieee80211_debugfs_add_netdev(sdata);
1596}
1597
34d4bc4d
JB		 1598static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1599 enum nl80211_iftype type)
1600{
1601 struct ieee80211_local *local = sdata->local;
1602 int ret, err;
2ca27bcf
JB		 1603 enum nl80211_iftype internal_type = type;
1604 bool p2p = false;
34d4bc4d
JB		 1605
1606 ASSERT_RTNL();
1607
1608 if (!local->ops->change_interface)
1609 return -EBUSY;
1610
1611 switch (sdata->vif.type) {
1612 case NL80211_IFTYPE_AP:
1613 case NL80211_IFTYPE_STATION:
1614 case NL80211_IFTYPE_ADHOC:
239281f8 1615 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1616 /*
1617 * Could maybe also all others here?
1618 * Just not sure how that interacts
1619 * with the RX/config path e.g. for
1620 * mesh.
1621 */
1622 break;
1623 default:
1624 return -EBUSY;
1625 }
1626
1627 switch (type) {
1628 case NL80211_IFTYPE_AP:
1629 case NL80211_IFTYPE_STATION:
1630 case NL80211_IFTYPE_ADHOC:
239281f8 1631 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1632 /*
1633 * Could probably support everything
1634 * but WDS here (WDS do_open can fail
1635 * under memory pressure, which this
1636 * code isn't prepared to handle).
1637 */
1638 break;
2ca27bcf
JB		 1639 case NL80211_IFTYPE_P2P_CLIENT:
1640 p2p = true;
1641 internal_type = NL80211_IFTYPE_STATION;
1642 break;
1643 case NL80211_IFTYPE_P2P_GO:
1644 p2p = true;
1645 internal_type = NL80211_IFTYPE_AP;
1646 break;
34d4bc4d
JB		 1647 default:
1648 return -EBUSY;
1649 }
1650
2ca27bcf 1651 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1652 if (ret)
1653 return ret;
1654
1655 ieee80211_do_stop(sdata, false);
1656
f142c6b9 1657 ieee80211_teardown_sdata(sdata);
34d4bc4d 1658
6aea26ce 1659 ieee80211_set_sdata_offload_flags(sdata);
2ca27bcf 1660 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1661 if (ret)
a9865538 1662 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1663
3a25a8c8
JB		 1664 /*
1665 * Ignore return value here, there's not much we can do since
1666 * the driver changed the interface type internally already.
1667 * The warnings will hopefully make driver authors fix it :-)
1668 */
a9865538 1669 ieee80211_check_queues(sdata, type);
3a25a8c8 1670
34d4bc4d 1671 ieee80211_setup_sdata(sdata, type);
6aea26ce 1672 ieee80211_set_vif_encap_ops(sdata);
34d4bc4d 1673
f142c6b9 1674 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1675 WARN(err, "type change: do_open returned %d", err);
1676
1677 return ret;
1678}
1679
f3947e2d 1680int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1681 enum nl80211_iftype type)
75636525 1682{
34d4bc4d
JB		 1683 int ret;
1684
f3947e2d
JB		 1685 ASSERT_RTNL();
1686
2ca27bcf 1687 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1688 return 0;
1689
34d4bc4d
JB		 1690 if (ieee80211_sdata_running(sdata)) {
1691 ret = ieee80211_runtime_change_iftype(sdata, type);
1692 if (ret)
1693 return ret;
1694 } else {
1695 /* Purge and reset type-dependent state. */
f142c6b9 1696 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1697 ieee80211_setup_sdata(sdata, type);
1698 }
75636525
JB		 1699
1700 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1701 if (type == NL80211_IFTYPE_STATION)
1702 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1703
1704 return 0;
f0706e82
JB		 1705}
1706
fa9029f8 1707static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1708 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1709{
1710 struct ieee80211_sub_if_data *sdata;
1711 u64 mask, start, addr, val, inc;
1712 u8 *m;
1713 u8 tmp_addr[ETH_ALEN];
1714 int i;
1715
1716 /* default ... something at least */
f142c6b9 1717 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1718
1719 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1720 local->hw.wiphy->n_addresses <= 1)
1721 return;
1722
fa9029f8
JB		 1723 mutex_lock(&local->iflist_mtx);
1724
1725 switch (type) {
1726 case NL80211_IFTYPE_MONITOR:
1727 /* doesn't matter */
1728 break;
1729 case NL80211_IFTYPE_WDS:
1730 case NL80211_IFTYPE_AP_VLAN:
1731 /* match up with an AP interface */
1732 list_for_each_entry(sdata, &local->interfaces, list) {
1733 if (sdata->vif.type != NL80211_IFTYPE_AP)
1734 continue;
f142c6b9 1735 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1736 break;
1737 }
1738 /* keep default if no AP interface present */
1739 break;
6d71117a
JB		 1740 case NL80211_IFTYPE_P2P_CLIENT:
1741 case NL80211_IFTYPE_P2P_GO:
30686bf7 1742 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1743 list_for_each_entry(sdata, &local->interfaces, list) {
1744 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1745 continue;
1746 if (!ieee80211_sdata_running(sdata))
1747 continue;
1748 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1749 goto out_unlock;
1750 }
1751 }
fc0561dc 1752 fallthrough;
fa9029f8
JB		 1753 default:
1754 /* assign a new address if possible -- try n_addresses first */
1755 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1756 bool used = false;
1757
1758 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1759 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1760 sdata->vif.addr)) {
fa9029f8
JB		 1761 used = true;
1762 break;
1763 }
1764 }
1765
1766 if (!used) {
f142c6b9 1767 memcpy(perm_addr,
fa9029f8
JB		 1768 local->hw.wiphy->addresses[i].addr,
1769 ETH_ALEN);
1770 break;
1771 }
1772 }
1773
1774 /* try mask if available */
1775 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1776 break;
1777
1778 m = local->hw.wiphy->addr_mask;
1779 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1780 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1781 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1782
1783 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1784 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1785 pr_info("not contiguous\n");
fa9029f8
JB		 1786 break;
1787 }
1788
ac20976d
HS		 1789 /*
1790 * Pick address of existing interface in case user changed
1791 * MAC address manually, default to perm_addr.
1792 */
fa9029f8 1793 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1794 list_for_each_entry(sdata, &local->interfaces, list) {
1795 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1796 continue;
1797 m = sdata->vif.addr;
1798 break;
1799 }
fa9029f8
JB		 1800 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1801 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1802 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1803
1804 inc = 1ULL<<__ffs64(mask);
1805 val = (start & mask);
1806 addr = (start & ~mask) | (val & mask);
1807 do {
1808 bool used = false;
1809
1810 tmp_addr[5] = addr >> 0*8;
1811 tmp_addr[4] = addr >> 1*8;
1812 tmp_addr[3] = addr >> 2*8;
1813 tmp_addr[2] = addr >> 3*8;
1814 tmp_addr[1] = addr >> 4*8;
1815 tmp_addr[0] = addr >> 5*8;
1816
1817 val += inc;
1818
1819 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1820 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1821 used = true;
1822 break;
1823 }
1824 }
1825
1826 if (!used) {
f142c6b9 1827 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1828 break;
1829 }
1830 addr = (start & ~mask) | (val & mask);
1831 } while (addr != start);
1832
1833 break;
1834 }
1835
6d71117a 1836 out_unlock:
fa9029f8
JB		 1837 mutex_unlock(&local->iflist_mtx);
1838}
1839
3e122be0 1840int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1841 unsigned char name_assign_type,
84efbb84 1842 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1843 struct vif_params *params)
f0706e82 1844{
f142c6b9 1845 struct net_device *ndev = NULL;
f0706e82 1846 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1847 struct txq_info *txqi;
80a83cfc 1848 void (*if_setup)(struct net_device *dev);
75636525 1849 int ret, i;
ded81f6b 1850 int txqs = 1;
f0706e82
JB		 1851
1852 ASSERT_RTNL();
75636525 1853
708d50ed 1854 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1855 struct wireless_dev *wdev;
1856
1857 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1858 GFP_KERNEL);
1859 if (!sdata)
1860 return -ENOMEM;
1861 wdev = &sdata->wdev;
1862
1863 sdata->dev = NULL;
1864 strlcpy(sdata->name, name, IFNAMSIZ);
1865 ieee80211_assign_perm_addr(local, wdev->address, type);
1866 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1867 } else {
ba8c3d6f
FF		 1868 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1869 sizeof(void *));
1870 int txq_size = 0;
1871
79af1f86
JB		 1872 if (local->ops->wake_tx_queue &&
1873 type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 1874 (type != NL80211_IFTYPE_MONITOR ||
1875 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 1876 txq_size += sizeof(struct txq_info) +
1877 local->hw.txq_data_size;
1878
dbd50a85 1879 if (local->ops->wake_tx_queue) {
80a83cfc 1880 if_setup = ieee80211_if_setup_no_queue;
dbd50a85 1881 } else {
80a83cfc 1882 if_setup = ieee80211_if_setup;
dbd50a85
JB		 1883 if (local->hw.queues >= IEEE80211_NUM_ACS)
1884 txqs = IEEE80211_NUM_ACS;
1885 }
f142c6b9 1886
ba8c3d6f 1887 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1888 name, name_assign_type,
80a83cfc 1889 if_setup, txqs, 1);
f142c6b9
JB		 1890 if (!ndev)
1891 return -ENOMEM;
1f6e0baa
JC		 1892
1893 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1894 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1895
f142c6b9
JB		 1896 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1897
5a490510
JB		 1898 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1899 if (!ndev->tstats) {
1900 free_netdev(ndev);
1901 return -ENOMEM;
1902 }
1903
f142c6b9
JB		 1904 ndev->needed_headroom = local->tx_headroom +
1905 4*6 /* four MAC addresses */
1906 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1907 + 6 /* mesh */
1908 + 8 /* rfc1042/bridge tunnel */
1909 - ETH_HLEN /* ethernet hard_header_len */
1910 + IEEE80211_ENCRYPT_HEADROOM;
1911 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1912
1913 ret = dev_alloc_name(ndev, ndev->name);
1914 if (ret < 0) {
e6436be2 1915 ieee80211_if_free(ndev);
c7a61cba 1916 free_netdev(ndev);
f142c6b9
JB		 1917 return ret;
1918 }
1919
1920 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 1921 if (is_valid_ether_addr(params->macaddr))
b5dfae02
BG		 1922 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1923 else
1924 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1925 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1926
1927 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1928 sdata = netdev_priv(ndev);
1929 ndev->ieee80211_ptr = &sdata->wdev;
1930 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1931 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1932
ba8c3d6f
FF		 1933 if (txq_size) {
1934 txqi = netdev_priv(ndev) + size;
fa962b92 1935 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1936 }
1937
f142c6b9
JB		 1938 sdata->dev = ndev;
1939 }
75636525
JB		 1940
1941 /* initialise type-independent data */
f0706e82 1942 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1943 sdata->local = local;
75636525
JB		 1944
1945 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1946 skb_queue_head_init(&sdata->fragments[i].skb_list);
1947
1948 INIT_LIST_HEAD(&sdata->key_list);
1949
164eb02d
SW		 1950 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1951 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1952 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1953 ieee80211_delayed_tailroom_dec);
97f97b1f 1954
57fbcce3 1955 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1956 struct ieee80211_supported_band *sband;
1957 sband = local->hw.wiphy->bands[i];
1958 sdata->rc_rateidx_mask[i] =
1959 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1960 if (sband) {
1961 __le16 cap;
1962 u16 *vht_rate_mask;
1963
19468413
SW		 1964 memcpy(sdata->rc_rateidx_mcs_mask[i],
1965 sband->ht_cap.mcs.rx_mask,
1966 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1967
1968 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1969 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1970 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1971 } else {
19468413
SW		 1972 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1973 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1974 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1975 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1976 }
37eb0b16 1977 }
75636525 1978
3a25a8c8
JB		 1979 ieee80211_set_default_queues(sdata);
1980
1ea6f9c0
JB		 1981 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1982 sdata->user_power_level = local->user_power_level;
1983
2475b1cc
MS		 1984 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1985
75636525
JB		 1986 /* setup type-dependent data */
1987 ieee80211_setup_sdata(sdata, type);
f0706e82 1988
f142c6b9 1989 if (ndev) {
dd665d23
JB		 1990 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1991 if (type == NL80211_IFTYPE_STATION)
1992 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 1993
f142c6b9 1994 ndev->features |= local->hw.netdev_features;
07b83d2e
JB		 1995 ndev->hw_features |= ndev->features &
1996 MAC80211_SUPPORTED_FEATURES_TX;
72d78728 1997
b7ffbd7e
JB		 1998 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1999
9c22b4a3
JW		 2000 /* MTU range: 256 - 2304 */
2001 ndev->min_mtu = 256;
06354665 2002 ndev->max_mtu = local->hw.max_mtu;
9c22b4a3 2003
f142c6b9
JB		 2004 ret = register_netdevice(ndev);
2005 if (ret) {
cf124db5 2006 free_netdev(ndev);
f142c6b9
JB		 2007 return ret;
2008 }
2009 }
f0706e82 2010
c771c9d8 2011 mutex_lock(&local->iflist_mtx);
79010420 2012 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 2013 mutex_unlock(&local->iflist_mtx);
79010420 2014
84efbb84
JB		 2015 if (new_wdev)
2016 *new_wdev = &sdata->wdev;
f0706e82 2017
f0706e82 2018 return 0;
f0706e82
JB		 2019}
2020
f698d856 2021void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 2022{
f0706e82 2023 ASSERT_RTNL();
11a843b7 2024
c771c9d8 2025 mutex_lock(&sdata->local->iflist_mtx);
75636525 2026 list_del_rcu(&sdata->list);
c771c9d8
JB		 2027 mutex_unlock(&sdata->local->iflist_mtx);
2028
f1267cf3
BP		 2029 if (sdata->vif.txq)
2030 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2031
75636525 2032 synchronize_rcu();
f142c6b9
JB		 2033
2034 if (sdata->dev) {
2035 unregister_netdevice(sdata->dev);
2036 } else {
2037 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 2038 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 2039 kfree(sdata);
2040 }
2041}
2042
2043void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2044{
2045 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2046 return;
2047 ieee80211_do_stop(sdata, true);
f0706e82
JB		 2048}
2049
75636525 2050void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 2051{
75636525 2052 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 2053 LIST_HEAD(unreg_list);
f142c6b9 2054 LIST_HEAD(wdev_list);
f0706e82
JB		 2055
2056 ASSERT_RTNL();
2057
d8d9008c
JB		 2058 /* Before destroying the interfaces, make sure they're all stopped so
2059 * that the hardware is stopped. Otherwise, the driver might still be
2060 * iterating the interfaces during the shutdown, e.g. from a worker
2061 * or from RX processing or similar, and if it does so (using atomic
2062 * iteration) while we're manipulating the list, the iteration will
2063 * crash.
2064 *
2065 * After this, the hardware should be stopped and the driver should
2066 * have stopped all of its activities, so that we can do RCU-unaware
2067 * manipulations of the interface list below.
c8aa22db 2068 */
d8d9008c
JB		 2069 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2070
2071 WARN(local->open_count, "%s: open count remains %d\n",
2072 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 2073
a50e5fb8
SS		 2074 ieee80211_txq_teardown_flows(local);
2075
efe117ab 2076 mutex_lock(&local->iflist_mtx);
75636525
JB		 2077 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2078 list_del(&sdata->list);
c771c9d8 2079
f142c6b9
JB		 2080 if (sdata->dev)
2081 unregister_netdevice_queue(sdata->dev, &unreg_list);
2082 else
2083 list_add(&sdata->list, &wdev_list);
f0706e82 2084 }
efe117ab
ED		 2085 mutex_unlock(&local->iflist_mtx);
2086 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 2087
2088 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2089 list_del(&sdata->list);
2090 cfg80211_unregister_wdev(&sdata->wdev);
2091 kfree(sdata);
2092 }
f0706e82 2093}
5cff20e6 2094
47846c9b 2095static int netdev_notify(struct notifier_block *nb,
351638e7 2096 unsigned long state, void *ptr)
47846c9b 2097{
351638e7 2098 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 2099 struct ieee80211_sub_if_data *sdata;
2100
2101 if (state != NETDEV_CHANGENAME)
8bd811aa 2102 return NOTIFY_DONE;
47846c9b
JB		 2103
2104 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 2105 return NOTIFY_DONE;
47846c9b
JB		 2106
2107 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2108 return NOTIFY_DONE;
47846c9b
JB		 2109
2110 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2111 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2112 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2113
2114 return NOTIFY_OK;
47846c9b
JB		 2115}
2116
2117static struct notifier_block mac80211_netdev_notifier = {
2118 .notifier_call = netdev_notify,
2119};
2120
2121int ieee80211_iface_init(void)
2122{
2123 return register_netdevice_notifier(&mac80211_netdev_notifier);
2124}
2125
2126void ieee80211_iface_exit(void)
2127{
2128 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2129}
72f15d53
MB		 2130
2131void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2132{
2133 if (sdata->vif.type == NL80211_IFTYPE_AP)
2134 atomic_inc(&sdata->u.ap.num_mcast_sta);
2135 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2136 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2137}
2138
2139void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2140{
2141 if (sdata->vif.type == NL80211_IFTYPE_AP)
2142 atomic_dec(&sdata->u.ap.num_mcast_sta);
2143 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2144 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2145}
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