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mac80211: add fragment cache to sta_info
[mirror_ubuntu-hirsute-kernel.git] / net / mac80211 / iface.c
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d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
f0706e82 2/*
c5d54fbf 3 * Interface handling
0d143fe1 4 *
f0706e82
JB		 5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 9 * Copyright 2013-2014 Intel Mobile Communications GmbH
d2941df8 10 * Copyright (c) 2016 Intel Deutschland GmbH
033d9008 11 * Copyright (C) 2018-2021 Intel Corporation
f0706e82 12 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
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_AP_VLAN) ||
234 (type1 == NL80211_IFTYPE_AP_VLAN &&
235 (type2 == NL80211_IFTYPE_AP ||
236 type2 == NL80211_IFTYPE_AP_VLAN));
237}
238
87490f6d
JB		 239static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
240 enum nl80211_iftype iftype)
0d143fe1 241{
b4a4bf5d 242 struct ieee80211_local *local = sdata->local;
87490f6d 243 struct ieee80211_sub_if_data *nsdata;
b6a55015 244 int ret;
0d143fe1 245
87490f6d 246 ASSERT_RTNL();
0d143fe1
JB		 247
248 /* we hold the RTNL here so can safely walk the list */
249 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 250 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 251 /*
252 * Only OCB and monitor mode may coexist
253 */
254 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
255 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
256 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
257 nsdata->vif.type == NL80211_IFTYPE_OCB))
258 return -EBUSY;
259
0d143fe1
JB		 260 /*
261 * Allow only a single IBSS interface to be up at any
262 * time. This is restricted because beacon distribution
263 * cannot work properly if both are in the same IBSS.
264 *
265 * To remove this restriction we'd have to disallow them
266 * from setting the same SSID on different IBSS interfaces
267 * belonging to the same hardware. Then, however, we're
268 * faced with having to adopt two different TSF timers...
269 */
87490f6d 270 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 271 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
272 return -EBUSY;
73da7d5b
SW		 273 /*
274 * will not add another interface while any channel
275 * switch is active.
276 */
277 if (nsdata->vif.csa_active)
278 return -EBUSY;
0d143fe1
JB		 279
280 /*
281 * The remaining checks are only performed for interfaces
282 * with the same MAC address.
283 */
371a255e
JB		 284 if (!ether_addr_equal(sdata->vif.addr,
285 nsdata->vif.addr))
0d143fe1
JB		 286 continue;
287
288 /*
289 * check whether it may have the same address
290 */
87490f6d 291 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 292 nsdata->vif.type))
293 return -ENOTUNIQ;
294
295 /*
296 * can only add VLANs to enabled APs
297 */
87490f6d 298 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 299 nsdata->vif.type == NL80211_IFTYPE_AP)
300 sdata->bss = &nsdata->u.ap;
301 }
302 }
303
b6a55015
LC		 304 mutex_lock(&local->chanctx_mtx);
305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
306 mutex_unlock(&local->chanctx_mtx);
307 return ret;
87490f6d
JB		 308}
309
a9865538
JB		 310static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
311 enum nl80211_iftype iftype)
3a25a8c8
JB		 312{
313 int n_queues = sdata->local->hw.queues;
314 int i;
315
708d50ed
AB		 316 if (iftype == NL80211_IFTYPE_NAN)
317 return 0;
318
a9865538 319 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 320 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
322 IEEE80211_INVAL_HW_QUEUE))
323 return -EINVAL;
324 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
325 n_queues))
326 return -EINVAL;
327 }
3a25a8c8
JB		 328 }
329
a9865538
JB		 330 if ((iftype != NL80211_IFTYPE_AP &&
331 iftype != NL80211_IFTYPE_P2P_GO &&
332 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 333 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 334 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
335 return 0;
336 }
337
338 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
339 return -EINVAL;
340
341 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
342 return -EINVAL;
343
344 return 0;
345}
346
4b7afb52 347static int ieee80211_open(struct net_device *dev)
6aea26ce 348{
4b7afb52
FF		 349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
350 int err;
351
352 /* fail early if user set an invalid address */
353 if (!is_valid_ether_addr(dev->dev_addr))
354 return -EADDRNOTAVAIL;
355
356 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
357 if (err)
358 return err;
359
360 return ieee80211_do_open(&sdata->wdev, true);
6aea26ce
FF		 361}
362
4b7afb52
FF		 363static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
364 bool going_down)
6aea26ce
FF		 365{
366 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 367 unsigned long flags;
368 struct sk_buff *skb, *tmp;
369 u32 hw_reconf_flags = 0;
370 int i, flushed;
371 struct ps_data *ps;
372 struct cfg80211_chan_def chandef;
373 bool cancel_scan;
374 struct cfg80211_nan_func *func;
6aea26ce 375
4b7afb52 376 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
6aea26ce 377
4b7afb52
FF		 378 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
379 if (cancel_scan)
380 ieee80211_scan_cancel(local);
6aea26ce 381
4b7afb52
FF		 382 /*
383 * Stop TX on this interface first.
384 */
385 if (sdata->dev)
386 netif_tx_stop_all_queues(sdata->dev);
6aea26ce 387
4b7afb52 388 ieee80211_roc_purge(local, sdata);
6aea26ce 389
4b7afb52
FF		 390 switch (sdata->vif.type) {
391 case NL80211_IFTYPE_STATION:
392 ieee80211_mgd_stop(sdata);
393 break;
394 case NL80211_IFTYPE_ADHOC:
395 ieee80211_ibss_stop(sdata);
396 break;
397 case NL80211_IFTYPE_MONITOR:
398 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
399 break;
400 list_del_rcu(&sdata->u.mntr.list);
401 break;
402 default:
403 break;
404 }
6aea26ce 405
4b7afb52
FF		 406 /*
407 * Remove all stations associated with this interface.
408 *
409 * This must be done before calling ops->remove_interface()
410 * because otherwise we can later invoke ops->sta_notify()
411 * whenever the STAs are removed, and that invalidates driver
412 * assumptions about always getting a vif pointer that is valid
413 * (because if we remove a STA after ops->remove_interface()
414 * the driver will have removed the vif info already!)
415 *
70d9c599 416 * For AP_VLANs stations may exist since there's nothing else that
4b7afb52
FF		 417 * would have removed them, but in other modes there shouldn't
418 * be any stations.
419 */
420 flushed = sta_info_flush(sdata);
70d9c599 421 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
6aea26ce 422
4b7afb52
FF		 423 /* don't count this interface for allmulti while it is down */
424 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
425 atomic_dec(&local->iff_allmultis);
6aea26ce 426
4b7afb52
FF		 427 if (sdata->vif.type == NL80211_IFTYPE_AP) {
428 local->fif_pspoll--;
429 local->fif_probe_req--;
430 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
431 local->fif_probe_req--;
6aea26ce
FF		 432 }
433
4b7afb52
FF		 434 if (sdata->dev) {
435 netif_addr_lock_bh(sdata->dev);
436 spin_lock_bh(&local->filter_lock);
437 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
438 sdata->dev->addr_len);
439 spin_unlock_bh(&local->filter_lock);
440 netif_addr_unlock_bh(sdata->dev);
6aea26ce 441 }
6aea26ce 442
4b7afb52
FF		 443 del_timer_sync(&local->dynamic_ps_timer);
444 cancel_work_sync(&local->dynamic_ps_enable_work);
6aea26ce 445
4b7afb52
FF		 446 cancel_work_sync(&sdata->recalc_smps);
447 sdata_lock(sdata);
448 mutex_lock(&local->mtx);
449 sdata->vif.csa_active = false;
450 if (sdata->vif.type == NL80211_IFTYPE_STATION)
451 sdata->u.mgd.csa_waiting_bcn = false;
452 if (sdata->csa_block_tx) {
453 ieee80211_wake_vif_queues(local, sdata,
454 IEEE80211_QUEUE_STOP_REASON_CSA);
455 sdata->csa_block_tx = false;
6aea26ce 456 }
4b7afb52
FF		 457 mutex_unlock(&local->mtx);
458 sdata_unlock(sdata);
6aea26ce 459
4b7afb52 460 cancel_work_sync(&sdata->csa_finalize_work);
85416a4f 461
4b7afb52 462 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
85416a4f 463
4b7afb52
FF		 464 if (sdata->wdev.cac_started) {
465 chandef = sdata->vif.bss_conf.chandef;
466 WARN_ON(local->suspended);
467 mutex_lock(&local->mtx);
468 ieee80211_vif_release_channel(sdata);
469 mutex_unlock(&local->mtx);
470 cfg80211_cac_event(sdata->dev, &chandef,
471 NL80211_RADAR_CAC_ABORTED,
472 GFP_KERNEL);
473 }
85416a4f 474
4b7afb52
FF		 475 /* APs need special treatment */
476 if (sdata->vif.type == NL80211_IFTYPE_AP) {
477 struct ieee80211_sub_if_data *vlan, *tmpsdata;
85416a4f 478
4b7afb52
FF		 479 /* down all dependent devices, that is VLANs */
480 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
481 u.vlan.list)
482 dev_close(vlan->dev);
483 WARN_ON(!list_empty(&sdata->u.ap.vlans));
484 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
485 /* remove all packets in parent bc_buf pointing to this dev */
486 ps = &sdata->bss->ps;
3a25a8c8 487
4b7afb52
FF		 488 spin_lock_irqsave(&ps->bc_buf.lock, flags);
489 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
490 if (skb->dev == sdata->dev) {
491 __skb_unlink(skb, &ps->bc_buf);
492 local->total_ps_buffered--;
493 ieee80211_free_txskb(&local->hw, skb);
494 }
495 }
496 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
3a25a8c8 497 }
3a25a8c8 498
4b7afb52
FF		 499 if (going_down)
500 local->open_count--;
4b6f1dd6 501
4b7afb52
FF		 502 switch (sdata->vif.type) {
503 case NL80211_IFTYPE_AP_VLAN:
504 mutex_lock(&local->mtx);
505 list_del(&sdata->u.vlan.list);
506 mutex_unlock(&local->mtx);
507 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
508 /* see comment in the default case below */
509 ieee80211_free_keys(sdata, true);
510 /* no need to tell driver */
511 break;
512 case NL80211_IFTYPE_MONITOR:
513 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
514 local->cooked_mntrs--;
515 break;
516 }
685fb72b 517
4b7afb52
FF		 518 local->monitors--;
519 if (local->monitors == 0) {
520 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
521 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
522 }
4b6f1dd6 523
4b7afb52
FF		 524 ieee80211_adjust_monitor_flags(sdata, -1);
525 break;
526 case NL80211_IFTYPE_NAN:
527 /* clean all the functions */
528 spin_lock_bh(&sdata->u.nan.func_lock);
4b6f1dd6 529
4b7afb52
FF		 530 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
531 idr_remove(&sdata->u.nan.function_inst_ids, i);
532 cfg80211_free_nan_func(func);
533 }
534 idr_destroy(&sdata->u.nan.function_inst_ids);
3a25a8c8 535
4b7afb52
FF		 536 spin_unlock_bh(&sdata->u.nan.func_lock);
537 break;
538 case NL80211_IFTYPE_P2P_DEVICE:
539 /* relies on synchronize_rcu() below */
540 RCU_INIT_POINTER(local->p2p_sdata, NULL);
541 fallthrough;
542 default:
543 cancel_work_sync(&sdata->work);
544 /*
545 * When we get here, the interface is marked down.
546 * Free the remaining keys, if there are any
547 * (which can happen in AP mode if userspace sets
70d9c599 548 * keys before the interface is operating)
4b7afb52
FF		 549 *
550 * Force the key freeing to always synchronize_net()
551 * to wait for the RX path in case it is using this
552 * interface enqueuing frames at this very time on
553 * another CPU.
554 */
555 ieee80211_free_keys(sdata, true);
556 skb_queue_purge(&sdata->skb_queue);
4b6f1dd6
JB		 557 }
558
4b7afb52
FF		 559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
560 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
561 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
562 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
563 if (info->control.vif == &sdata->vif) {
564 __skb_unlink(skb, &local->pending[i]);
565 ieee80211_free_txskb(&local->hw, skb);
566 }
567 }
3a25a8c8 568 }
4b7afb52 569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
3a25a8c8 570
4b7afb52
FF		 571 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
572 ieee80211_txq_remove_vlan(local, sdata);
fab57a6c 573
4b7afb52
FF		 574 sdata->bss = NULL;
575
576 if (local->open_count == 0)
577 ieee80211_clear_tx_pending(local);
578
579 sdata->vif.bss_conf.beacon_int = 0;
580
581 /*
582 * If the interface goes down while suspended, presumably because
583 * the device was unplugged and that happens before our resume,
584 * then the driver is already unconfigured and the remainder of
585 * this function isn't needed.
586 * XXX: what about WoWLAN? If the device has software state, e.g.
587 * memory allocated, it might expect teardown commands from
588 * mac80211 here?
589 */
590 if (local->suspended) {
591 WARN_ON(local->wowlan);
592 WARN_ON(rtnl_dereference(local->monitor_sdata));
593 return;
55de908a
JB		 594 }
595
4b7afb52
FF		 596 switch (sdata->vif.type) {
597 case NL80211_IFTYPE_AP_VLAN:
598 break;
599 case NL80211_IFTYPE_MONITOR:
600 if (local->monitors == 0)
601 ieee80211_del_virtual_monitor(local);
42bd20d9 602
4b7afb52
FF		 603 mutex_lock(&local->mtx);
604 ieee80211_recalc_idle(local);
605 mutex_unlock(&local->mtx);
4b6f1dd6 606
4b7afb52
FF		 607 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
608 break;
4b6f1dd6 609
4b7afb52
FF		 610 fallthrough;
611 default:
612 if (going_down)
613 drv_remove_interface(local, sdata);
614 }
4b6f1dd6 615
4b7afb52 616 ieee80211_recalc_ps(local);
8b305780 617
4b7afb52
FF		 618 if (cancel_scan)
619 flush_delayed_work(&local->scan_work);
4b6f1dd6 620
4b7afb52
FF		 621 if (local->open_count == 0) {
622 ieee80211_stop_device(local);
623
624 /* no reconfiguring after stop! */
8b305780
JB		 625 return;
626 }
4b6f1dd6 627
4b7afb52
FF		 628 /* do after stop to avoid reconfiguring when we stop anyway */
629 ieee80211_configure_filter(local);
630 ieee80211_hw_config(local, hw_reconf_flags);
8b305780 631
4b7afb52
FF		 632 if (local->monitors == local->open_count)
633 ieee80211_add_virtual_monitor(local);
634}
4b6f1dd6 635
4b7afb52
FF		 636static int ieee80211_stop(struct net_device *dev)
637{
638 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
55de908a 639
4b7afb52 640 ieee80211_do_stop(sdata, true);
4b6f1dd6 641
4b7afb52 642 return 0;
4b6f1dd6
JB		 643}
644
4b7afb52 645static void ieee80211_set_multicast_list(struct net_device *dev)
87490f6d 646{
4b7afb52 647 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
87490f6d 648 struct ieee80211_local *local = sdata->local;
4b7afb52 649 int allmulti, sdata_allmulti;
87490f6d 650
4b7afb52
FF		 651 allmulti = !!(dev->flags & IFF_ALLMULTI);
652 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
665c93a9 653
4b7afb52
FF		 654 if (allmulti != sdata_allmulti) {
655 if (dev->flags & IFF_ALLMULTI)
656 atomic_inc(&local->iff_allmultis);
657 else
658 atomic_dec(&local->iff_allmultis);
659 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
660 }
665c93a9 661
4b7afb52
FF		 662 spin_lock_bh(&local->filter_lock);
663 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
664 spin_unlock_bh(&local->filter_lock);
665 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
666}
665c93a9 667
4b7afb52
FF		 668/*
669 * Called when the netdev is removed or, by the code below, before
670 * the interface type changes.
671 */
672static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
673{
4b7afb52
FF		 674 /* free extra data */
675 ieee80211_free_keys(sdata, false);
f9dca80b 676
4b7afb52 677 ieee80211_debugfs_remove_netdev(sdata);
0d143fe1 678
033d9008 679 ieee80211_destroy_frag_cache(&sdata->frags);
0d143fe1 680
4b7afb52
FF		 681 if (ieee80211_vif_is_mesh(&sdata->vif))
682 ieee80211_mesh_teardown_sdata(sdata);
683}
0d143fe1 684
4b7afb52
FF		 685static void ieee80211_uninit(struct net_device *dev)
686{
687 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
688}
075e0847 689
4b7afb52
FF		 690static u16 ieee80211_netdev_select_queue(struct net_device *dev,
691 struct sk_buff *skb,
692 struct net_device *sb_dev)
693{
694 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
695}
0d143fe1 696
4b7afb52
FF		 697static void
698ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
699{
6401297e 700 dev_fetch_sw_netstats(stats, dev->tstats);
4b7afb52 701}
e3b90ca2 702
4b7afb52
FF		 703static const struct net_device_ops ieee80211_dataif_ops = {
704 .ndo_open = ieee80211_open,
705 .ndo_stop = ieee80211_stop,
706 .ndo_uninit = ieee80211_uninit,
707 .ndo_start_xmit = ieee80211_subif_start_xmit,
708 .ndo_set_rx_mode = ieee80211_set_multicast_list,
709 .ndo_set_mac_address = ieee80211_change_mac,
710 .ndo_select_queue = ieee80211_netdev_select_queue,
711 .ndo_get_stats64 = ieee80211_get_stats64,
712};
e3b90ca2 713
4b7afb52
FF		 714static u16 ieee80211_monitor_select_queue(struct net_device *dev,
715 struct sk_buff *skb,
716 struct net_device *sb_dev)
717{
718 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
719 struct ieee80211_local *local = sdata->local;
720 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
721 struct ieee80211_hdr *hdr;
722 int len_rthdr;
90e8f58d 723
4b7afb52
FF		 724 if (local->hw.queues < IEEE80211_NUM_ACS)
725 return 0;
0d143fe1 726
4b7afb52
FF		 727 /* reset flags and info before parsing radiotap header */
728 memset(info, 0, sizeof(*info));
59034591 729
4b7afb52
FF		 730 if (!ieee80211_parse_tx_radiotap(skb, dev))
731 return 0; /* doesn't matter, frame will be dropped */
0d143fe1 732
4b7afb52
FF		 733 len_rthdr = ieee80211_get_radiotap_len(skb->data);
734 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
735 if (skb->len < len_rthdr + 2 ||
736 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
737 return 0; /* doesn't matter, frame will be dropped */
2d2080c3 738
4b7afb52
FF		 739 return ieee80211_select_queue_80211(sdata, skb, hdr);
740}
0d143fe1 741
4b7afb52
FF		 742static const struct net_device_ops ieee80211_monitorif_ops = {
743 .ndo_open = ieee80211_open,
744 .ndo_stop = ieee80211_stop,
745 .ndo_uninit = ieee80211_uninit,
746 .ndo_start_xmit = ieee80211_monitor_start_xmit,
747 .ndo_set_rx_mode = ieee80211_set_multicast_list,
748 .ndo_set_mac_address = ieee80211_change_mac,
749 .ndo_select_queue = ieee80211_monitor_select_queue,
750 .ndo_get_stats64 = ieee80211_get_stats64,
751};
0d143fe1 752
4b7afb52
FF		 753static const struct net_device_ops ieee80211_dataif_8023_ops = {
754 .ndo_open = ieee80211_open,
755 .ndo_stop = ieee80211_stop,
756 .ndo_uninit = ieee80211_uninit,
757 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
758 .ndo_set_rx_mode = ieee80211_set_multicast_list,
759 .ndo_set_mac_address = ieee80211_change_mac,
760 .ndo_select_queue = ieee80211_netdev_select_queue,
761 .ndo_get_stats64 = ieee80211_get_stats64,
762};
1be7fe8d 763
4b7afb52
FF		 764static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
765{
766 switch (iftype) {
767 /* P2P GO and client are mapped to AP/STATION types */
768 case NL80211_IFTYPE_AP:
769 case NL80211_IFTYPE_STATION:
770 return true;
f64331d5 771 default:
4b7afb52 772 return false;
0d143fe1 773 }
4b7afb52 774}
0d143fe1 775
4b7afb52
FF		 776static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
777{
778 struct ieee80211_local *local = sdata->local;
779 u32 flags;
965bedad 780
4b7afb52 781 flags = sdata->vif.offload_flags;
2b730daa 782
4b7afb52
FF		 783 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
784 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
785 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 786
4b7afb52
FF		 787 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
788 local->hw.wiphy->frag_threshold != (u32)-1)
789 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 790
4b7afb52
FF		 791 if (local->monitors)
792 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
793 } else {
794 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
2b730daa 795 }
0d143fe1 796
4b7afb52
FF		 797 if (sdata->vif.offload_flags == flags)
798 return false;
799
800 sdata->vif.offload_flags = flags;
801 return true;
0d143fe1
JB		 802}
803
4b7afb52 804static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
0d143fe1 805{
4b7afb52
FF		 806 struct ieee80211_local *local = sdata->local;
807 struct ieee80211_sub_if_data *bss = sdata;
808 bool enabled;
34d4bc4d 809
4b7afb52
FF		 810 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
811 if (!sdata->bss)
812 return;
34d4bc4d 813
4b7afb52
FF		 814 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
815 }
34d4bc4d 816
4b7afb52
FF		 817 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
818 !ieee80211_iftype_supports_encap_offload(bss->vif.type))
819 return;
34d4bc4d 820
4b7afb52
FF		 821 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
822 if (sdata->wdev.use_4addr &&
823 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
824 enabled = false;
0d143fe1 825
4b7afb52
FF		 826 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
827 &ieee80211_dataif_ops;
828}
c29acf20 829
4b7afb52
FF		 830static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
831{
832 struct ieee80211_local *local = sdata->local;
833 struct ieee80211_sub_if_data *vsdata;
352ffad6 834
4b7afb52
FF		 835 if (ieee80211_set_sdata_offload_flags(sdata)) {
836 drv_update_vif_offload(local, sdata);
837 ieee80211_set_vif_encap_ops(sdata);
838 }
0d143fe1 839
4b7afb52
FF		 840 list_for_each_entry(vsdata, &local->interfaces, list) {
841 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
842 vsdata->bss != &sdata->u.ap)
843 continue;
af6b6374 844
4b7afb52 845 ieee80211_set_vif_encap_ops(vsdata);
8ffcc704 846 }
4b7afb52 847}
cd7760e6 848
4b7afb52
FF		 849void ieee80211_recalc_offload(struct ieee80211_local *local)
850{
851 struct ieee80211_sub_if_data *sdata;
0d143fe1 852
4b7afb52
FF		 853 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
854 return;
0d143fe1 855
4b7afb52 856 mutex_lock(&local->iflist_mtx);
e3b90ca2 857
4b7afb52
FF		 858 list_for_each_entry(sdata, &local->interfaces, list) {
859 if (!ieee80211_sdata_running(sdata))
860 continue;
861
862 ieee80211_recalc_sdata_offload(sdata);
f142c6b9 863 }
3ac64bee 864
4b7afb52
FF		 865 mutex_unlock(&local->iflist_mtx);
866}
0d143fe1 867
4b7afb52
FF		 868void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
869 const int offset)
870{
871 struct ieee80211_local *local = sdata->local;
872 u32 flags = sdata->u.mntr.flags;
59af6928 873
4b7afb52
FF		 874#define ADJUST(_f, _s) do { \
875 if (flags & MONITOR_FLAG_##_f) \
876 local->fif_##_s += offset; \
877 } while (0)
04ecd257 878
4b7afb52
FF		 879 ADJUST(FCSFAIL, fcsfail);
880 ADJUST(PLCPFAIL, plcpfail);
881 ADJUST(CONTROL, control);
882 ADJUST(CONTROL, pspoll);
883 ADJUST(OTHER_BSS, other_bss);
164eb02d 884
4b7afb52
FF		 885#undef ADJUST
886}
887
888static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
889{
890 struct ieee80211_local *local = sdata->local;
891 int i;
892
893 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
894 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
895 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
896 else if (local->hw.queues >= IEEE80211_NUM_ACS)
897 sdata->vif.hw_queue[i] = i;
898 else
899 sdata->vif.hw_queue[i] = 0;
164eb02d 900 }
4b7afb52
FF		 901 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
902}
164eb02d 903
4b7afb52
FF		 904int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
905{
906 struct ieee80211_sub_if_data *sdata;
907 int ret;
0d143fe1 908
4b7afb52
FF		 909 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
910 return 0;
397a7a24 911
4b7afb52 912 ASSERT_RTNL();
0d143fe1 913
4b7afb52
FF		 914 if (local->monitor_sdata)
915 return 0;
0d143fe1 916
4b7afb52
FF		 917 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
918 if (!sdata)
919 return -ENOMEM;
0d143fe1 920
4b7afb52
FF		 921 /* set up data */
922 sdata->local = local;
923 sdata->vif.type = NL80211_IFTYPE_MONITOR;
924 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
925 wiphy_name(local->hw.wiphy));
926 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
0d143fe1 927
4b7afb52 928 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
167e33f4 929
4b7afb52 930 ieee80211_set_default_queues(sdata);
167e33f4 931
4b7afb52
FF		 932 ret = drv_add_interface(local, sdata);
933 if (WARN_ON(ret)) {
934 /* ok .. stupid driver, it asked for this! */
935 kfree(sdata);
936 return ret;
937 }
938
bdeca45a
BA		 939 set_bit(SDATA_STATE_RUNNING, &sdata->state);
940
4b7afb52
FF		 941 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
942 if (ret) {
943 kfree(sdata);
944 return ret;
0d143fe1
JB		 945 }
946
4b7afb52
FF		 947 mutex_lock(&local->iflist_mtx);
948 rcu_assign_pointer(local->monitor_sdata, sdata);
949 mutex_unlock(&local->iflist_mtx);
950
951 mutex_lock(&local->mtx);
952 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
953 IEEE80211_CHANCTX_EXCLUSIVE);
954 mutex_unlock(&local->mtx);
955 if (ret) {
956 mutex_lock(&local->iflist_mtx);
957 RCU_INIT_POINTER(local->monitor_sdata, NULL);
958 mutex_unlock(&local->iflist_mtx);
959 synchronize_net();
960 drv_remove_interface(local, sdata);
961 kfree(sdata);
962 return ret;
5061b0c2 963 }
075e0847 964
4b7afb52
FF		 965 skb_queue_head_init(&sdata->skb_queue);
966 INIT_WORK(&sdata->work, ieee80211_iface_work);
53168215 967
4b7afb52
FF		 968 return 0;
969}
ba8c3d6f 970
4b7afb52
FF		 971void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
972{
973 struct ieee80211_sub_if_data *sdata;
b2c0958b 974
4b7afb52
FF		 975 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
976 return;
5c21e810 977
4b7afb52
FF		 978 ASSERT_RTNL();
979
980 mutex_lock(&local->iflist_mtx);
981
982 sdata = rcu_dereference_protected(local->monitor_sdata,
983 lockdep_is_held(&local->iflist_mtx));
984 if (!sdata) {
985 mutex_unlock(&local->iflist_mtx);
b2c0958b
JB		 986 return;
987 }
988
4b7afb52
FF		 989 RCU_INIT_POINTER(local->monitor_sdata, NULL);
990 mutex_unlock(&local->iflist_mtx);
991
992 synchronize_net();
993
994 mutex_lock(&local->mtx);
995 ieee80211_vif_release_channel(sdata);
996 mutex_unlock(&local->mtx);
997
998 drv_remove_interface(local, sdata);
999
1000 kfree(sdata);
1001}
1002
1003/*
1004 * NOTE: Be very careful when changing this function, it must NOT return
1005 * an error on interface type changes that have been pre-checked, so most
1006 * checks should be in ieee80211_check_concurrent_iface.
1007 */
1008int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1009{
1010 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1011 struct net_device *dev = wdev->netdev;
1012 struct ieee80211_local *local = sdata->local;
4b7afb52
FF		 1013 u32 changed = 0;
1014 int res;
1015 u32 hw_reconf_flags = 0;
1016
b2c0958b 1017 switch (sdata->vif.type) {
4b7afb52
FF		 1018 case NL80211_IFTYPE_AP_VLAN: {
1019 struct ieee80211_sub_if_data *master;
1020
1021 if (!sdata->bss)
1022 return -ENOLINK;
b2c0958b
JB		 1023
1024 mutex_lock(&local->mtx);
4b7afb52 1025 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
b2c0958b 1026 mutex_unlock(&local->mtx);
31eba5bc 1027
4b7afb52
FF		 1028 master = container_of(sdata->bss,
1029 struct ieee80211_sub_if_data, u.ap);
1030 sdata->control_port_protocol =
1031 master->control_port_protocol;
1032 sdata->control_port_no_encrypt =
1033 master->control_port_no_encrypt;
1034 sdata->control_port_over_nl80211 =
1035 master->control_port_over_nl80211;
1036 sdata->control_port_no_preauth =
1037 master->control_port_no_preauth;
1038 sdata->vif.cab_queue = master->vif.cab_queue;
1039 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1040 sizeof(sdata->vif.hw_queue));
1041 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
b2c0958b 1042
4b7afb52
FF		 1043 mutex_lock(&local->key_mtx);
1044 sdata->crypto_tx_tailroom_needed_cnt +=
1045 master->crypto_tx_tailroom_needed_cnt;
1046 mutex_unlock(&local->key_mtx);
b2c0958b 1047
4b7afb52
FF		 1048 break;
1049 }
1050 case NL80211_IFTYPE_AP:
1051 sdata->bss = &sdata->u.ap;
1052 break;
1053 case NL80211_IFTYPE_MESH_POINT:
1054 case NL80211_IFTYPE_STATION:
1055 case NL80211_IFTYPE_MONITOR:
1056 case NL80211_IFTYPE_ADHOC:
1057 case NL80211_IFTYPE_P2P_DEVICE:
1058 case NL80211_IFTYPE_OCB:
1059 case NL80211_IFTYPE_NAN:
1060 /* no special treatment */
1061 break;
1062 case NL80211_IFTYPE_UNSPECIFIED:
1063 case NUM_NL80211_IFTYPES:
1064 case NL80211_IFTYPE_P2P_CLIENT:
1065 case NL80211_IFTYPE_P2P_GO:
70d9c599 1066 case NL80211_IFTYPE_WDS:
4b7afb52
FF		 1067 /* cannot happen */
1068 WARN_ON(1);
1069 break;
1070 }
46238845 1071
b2c0958b 1072 if (local->open_count == 0) {
4b7afb52
FF		 1073 res = drv_start(local);
1074 if (res)
1075 goto err_del_bss;
1076 /* we're brought up, everything changes */
1077 hw_reconf_flags = ~0;
1078 ieee80211_led_radio(local, true);
1079 ieee80211_mod_tpt_led_trig(local,
1080 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
b2c0958b
JB		 1081 }
1082
4b7afb52
FF		 1083 /*
1084 * Copy the hopefully now-present MAC address to
1085 * this interface, if it has the special null one.
1086 */
1087 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1088 memcpy(dev->dev_addr,
1089 local->hw.wiphy->perm_addr,
1090 ETH_ALEN);
1091 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
34d4bc4d 1092
4b7afb52
FF		 1093 if (!is_valid_ether_addr(dev->dev_addr)) {
1094 res = -EADDRNOTAVAIL;
1095 goto err_stop;
1096 }
1097 }
34d4bc4d 1098
4b7afb52
FF		 1099 switch (sdata->vif.type) {
1100 case NL80211_IFTYPE_AP_VLAN:
1101 /* no need to tell driver, but set carrier and chanctx */
1102 if (rtnl_dereference(sdata->bss->beacon)) {
1103 ieee80211_vif_vlan_copy_chanctx(sdata);
1104 netif_carrier_on(dev);
1105 ieee80211_set_vif_encap_ops(sdata);
1106 } else {
1107 netif_carrier_off(dev);
1108 }
1109 break;
1110 case NL80211_IFTYPE_MONITOR:
1111 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1112 local->cooked_mntrs++;
1113 break;
1114 }
5061b0c2 1115
4b7afb52
FF		 1116 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1117 res = drv_add_interface(local, sdata);
1118 if (res)
1119 goto err_stop;
1120 } else if (local->monitors == 0 && local->open_count == 0) {
1121 res = ieee80211_add_virtual_monitor(local);
1122 if (res)
1123 goto err_stop;
1124 }
0d143fe1 1125
4b7afb52
FF		 1126 /* must be before the call to ieee80211_configure_filter */
1127 local->monitors++;
1128 if (local->monitors == 1) {
1129 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1130 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1131 }
0d143fe1 1132
4b7afb52
FF		 1133 ieee80211_adjust_monitor_flags(sdata, 1);
1134 ieee80211_configure_filter(local);
1135 ieee80211_recalc_offload(local);
1136 mutex_lock(&local->mtx);
1137 ieee80211_recalc_idle(local);
1138 mutex_unlock(&local->mtx);
0d143fe1 1139
4b7afb52
FF		 1140 netif_carrier_on(dev);
1141 break;
1142 default:
1143 if (coming_up) {
1144 ieee80211_del_virtual_monitor(local);
1145 ieee80211_set_sdata_offload_flags(sdata);
0d143fe1 1146
4b7afb52
FF		 1147 res = drv_add_interface(local, sdata);
1148 if (res)
1149 goto err_stop;
0d143fe1 1150
4b7afb52
FF		 1151 ieee80211_set_vif_encap_ops(sdata);
1152 res = ieee80211_check_queues(sdata,
1153 ieee80211_vif_type_p2p(&sdata->vif));
1154 if (res)
1155 goto err_del_interface;
1156 }
f0706e82 1157
4b7afb52
FF		 1158 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1159 local->fif_pspoll++;
1160 local->fif_probe_req++;
75636525 1161
4b7afb52
FF		 1162 ieee80211_configure_filter(local);
1163 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1164 local->fif_probe_req++;
1165 }
aee14ceb 1166
4b7afb52
FF		 1167 if (sdata->vif.probe_req_reg)
1168 drv_config_iface_filter(local, sdata,
1169 FIF_PROBE_REQ,
1170 FIF_PROBE_REQ);
11a843b7 1171
4b7afb52
FF		 1172 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1173 sdata->vif.type != NL80211_IFTYPE_NAN)
1174 changed |= ieee80211_reset_erp_info(sdata);
1175 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82 1176
4b7afb52
FF		 1177 switch (sdata->vif.type) {
1178 case NL80211_IFTYPE_STATION:
1179 case NL80211_IFTYPE_ADHOC:
1180 case NL80211_IFTYPE_AP:
1181 case NL80211_IFTYPE_MESH_POINT:
1182 case NL80211_IFTYPE_OCB:
1183 netif_carrier_off(dev);
1184 break;
4b7afb52
FF		 1185 case NL80211_IFTYPE_P2P_DEVICE:
1186 case NL80211_IFTYPE_NAN:
1187 break;
1188 default:
1189 /* not reached */
1190 WARN_ON(1);
1191 }
f142c6b9 1192
4b7afb52
FF		 1193 /*
1194 * Set default queue parameters so drivers don't
1195 * need to initialise the hardware if the hardware
1196 * doesn't start up with sane defaults.
1197 * Enable QoS for anything but station interfaces.
1198 */
1199 ieee80211_set_wmm_default(sdata, true,
1200 sdata->vif.type != NL80211_IFTYPE_STATION);
1201 }
cf0277e7 1202
4b7afb52 1203 set_bit(SDATA_STATE_RUNNING, &sdata->state);
5a490510 1204
4b7afb52 1205 switch (sdata->vif.type) {
4b7afb52
FF		 1206 case NL80211_IFTYPE_P2P_DEVICE:
1207 rcu_assign_pointer(local->p2p_sdata, sdata);
1208 break;
1209 case NL80211_IFTYPE_MONITOR:
1210 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1211 break;
1212 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1213 break;
1214 default:
1215 break;
5a490510 1216 }
5a490510 1217
4b7afb52
FF		 1218 /*
1219 * set_multicast_list will be invoked by the networking core
1220 * which will check whether any increments here were done in
1221 * error and sync them down to the hardware as filter flags.
1222 */
1223 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1224 atomic_inc(&local->iff_allmultis);
587e729e 1225
4b7afb52
FF		 1226 if (coming_up)
1227 local->open_count++;
cf0277e7 1228
4b7afb52
FF		 1229 if (hw_reconf_flags)
1230 ieee80211_hw_config(local, hw_reconf_flags);
cf0277e7 1231
4b7afb52 1232 ieee80211_recalc_ps(local);
cb17ed29 1233
4b7afb52
FF		 1234 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1235 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1236 local->ops->wake_tx_queue) {
1237 /* XXX: for AP_VLAN, actually track AP queues */
1238 if (dev)
1239 netif_tx_start_all_queues(dev);
1240 } else if (dev) {
1241 unsigned long flags;
1242 int n_acs = IEEE80211_NUM_ACS;
1243 int ac;
cf0277e7 1244
4b7afb52
FF		 1245 if (local->hw.queues < IEEE80211_NUM_ACS)
1246 n_acs = 1;
cf0277e7 1247
4b7afb52
FF		 1248 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1249 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1250 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1251 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1252 for (ac = 0; ac < n_acs; ac++) {
1253 int ac_queue = sdata->vif.hw_queue[ac];
cf0277e7 1254
4b7afb52
FF		 1255 if (local->queue_stop_reasons[ac_queue] == 0 &&
1256 skb_queue_empty(&local->pending[ac_queue]))
1257 netif_start_subqueue(dev, ac);
1258 }
1259 }
1260 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1261 }
587e729e 1262
4b7afb52
FF		 1263 return 0;
1264 err_del_interface:
1265 drv_remove_interface(local, sdata);
1266 err_stop:
1267 if (!local->open_count)
1268 drv_stop(local);
1269 err_del_bss:
1270 sdata->bss = NULL;
1271 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1272 mutex_lock(&local->mtx);
1273 list_del(&sdata->u.vlan.list);
1274 mutex_unlock(&local->mtx);
1275 }
1276 /* might already be clear but that doesn't matter */
1277 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1278 return res;
1279}
50ff477a 1280
5a490510
JB		 1281static void ieee80211_if_free(struct net_device *dev)
1282{
1283 free_percpu(dev->tstats);
5a490510
JB		 1284}
1285
587e729e
JB		 1286static void ieee80211_if_setup(struct net_device *dev)
1287{
1288 ether_setup(dev);
550fd08c 1289 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1290 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1291 dev->needs_free_netdev = true;
1292 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1293}
1294
80a83cfc
MK		 1295static void ieee80211_if_setup_no_queue(struct net_device *dev)
1296{
1297 ieee80211_if_setup(dev);
1298 dev->priv_flags |= IFF_NO_QUEUE;
1299}
1300
1fa57d01
JB		 1301static void ieee80211_iface_work(struct work_struct *work)
1302{
1303 struct ieee80211_sub_if_data *sdata =
1304 container_of(work, struct ieee80211_sub_if_data, work);
1305 struct ieee80211_local *local = sdata->local;
1306 struct sk_buff *skb;
344eec67 1307 struct sta_info *sta;
1fa57d01
JB		 1308
1309 if (!ieee80211_sdata_running(sdata))
1310 return;
1311
fc58c47e 1312 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1313 return;
1314
4afaff17 1315 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1316 return;
1317
1318 /* first process frames */
1319 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1320 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1321
261e411b 1322 kcov_remote_start_common(skb_get_kcov_handle(skb));
699cb58c
JB		 1323 if (ieee80211_is_action(mgmt->frame_control) &&
1324 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1325 int len = skb->len;
bed7ee6e 1326
a93e3644 1327 mutex_lock(&local->sta_mtx);
875ae5f6 1328 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1329 if (sta) {
1330 switch (mgmt->u.action.u.addba_req.action_code) {
1331 case WLAN_ACTION_ADDBA_REQ:
1332 ieee80211_process_addba_request(
1333 local, sta, mgmt, len);
1334 break;
1335 case WLAN_ACTION_ADDBA_RESP:
1336 ieee80211_process_addba_resp(local, sta,
1337 mgmt, len);
1338 break;
1339 case WLAN_ACTION_DELBA:
1340 ieee80211_process_delba(sdata, sta,
1341 mgmt, len);
1342 break;
1343 default:
1344 WARN_ON(1);
1345 break;
1346 }
1347 }
a93e3644 1348 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1349 } else if (ieee80211_is_action(mgmt->frame_control) &&
1350 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1351 switch (mgmt->u.action.u.vht_group_notif.action_code) {
d2941df8
JB		 1352 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1353 struct ieee80211_rx_status *status;
1354 enum nl80211_band band;
1355 u8 opmode;
1356
1357 status = IEEE80211_SKB_RXCB(skb);
1358 band = status->band;
1359 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1360
1361 mutex_lock(&local->sta_mtx);
1362 sta = sta_info_get_bss(sdata, mgmt->sa);
1363
1364 if (sta)
1365 ieee80211_vht_handle_opmode(sdata, sta,
1366 opmode,
1367 band);
1368
1369 mutex_unlock(&local->sta_mtx);
1370 break;
1371 }
23a1f8d4
SS		 1372 case WLAN_VHT_ACTION_GROUPID_MGMT:
1373 ieee80211_process_mu_groups(sdata, mgmt);
1374 break;
1375 default:
1376 WARN_ON(1);
1377 break;
1378 }
09a740ce
TP		 1379 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1380 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1381 ieee80211_sta_rx_queued_ext(sdata, skb);
1382 else
1383 WARN_ON(1);
344eec67
JB		 1384 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1385 struct ieee80211_hdr *hdr = (void *)mgmt;
1386 /*
1387 * So the frame isn't mgmt, but frame_control
1388 * is at the right place anyway, of course, so
1389 * the if statement is correct.
1390 *
1391 * Warn if we have other data frame types here,
1392 * they must not get here.
1393 */
1394 WARN_ON(hdr->frame_control &
1395 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1396 WARN_ON(!(hdr->seq_ctrl &
1397 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1398 /*
1399 * This was a fragment of a frame, received while
1400 * a block-ack session was active. That cannot be
1401 * right, so terminate the session.
1402 */
a93e3644 1403 mutex_lock(&local->sta_mtx);
875ae5f6 1404 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67 1405 if (sta) {
a1f2ba04 1406 u16 tid = ieee80211_get_tid(hdr);
344eec67
JB		 1407
1408 __ieee80211_stop_rx_ba_session(
1409 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1410 WLAN_REASON_QSTA_REQUIRE_SETUP,
1411 true);
344eec67 1412 }
a93e3644 1413 mutex_unlock(&local->sta_mtx);
bed7ee6e 1414 } else switch (sdata->vif.type) {
1fa57d01
JB		 1415 case NL80211_IFTYPE_STATION:
1416 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1417 break;
1418 case NL80211_IFTYPE_ADHOC:
1419 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1420 break;
1421 case NL80211_IFTYPE_MESH_POINT:
1422 if (!ieee80211_vif_is_mesh(&sdata->vif))
1423 break;
1424 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1425 break;
1426 default:
1427 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1428 break;
1429 }
36b3a628
JB		 1430
1431 kfree_skb(skb);
261e411b 1432 kcov_remote_stop();
1fa57d01
JB		 1433 }
1434
1435 /* then other type-dependent work */
1436 switch (sdata->vif.type) {
1437 case NL80211_IFTYPE_STATION:
1438 ieee80211_sta_work(sdata);
1439 break;
1440 case NL80211_IFTYPE_ADHOC:
1441 ieee80211_ibss_work(sdata);
1442 break;
1443 case NL80211_IFTYPE_MESH_POINT:
1444 if (!ieee80211_vif_is_mesh(&sdata->vif))
1445 break;
1446 ieee80211_mesh_work(sdata);
1447 break;
239281f8
RL		 1448 case NL80211_IFTYPE_OCB:
1449 ieee80211_ocb_work(sdata);
1450 break;
1fa57d01
JB		 1451 default:
1452 break;
1453 }
1454}
1455
04ecd257
JB		 1456static void ieee80211_recalc_smps_work(struct work_struct *work)
1457{
1458 struct ieee80211_sub_if_data *sdata =
1459 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1460
1461 ieee80211_recalc_smps(sdata);
1462}
1fa57d01 1463
75636525
JB		 1464/*
1465 * Helper function to initialise an interface to a specific type.
1466 */
1467static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1468 enum nl80211_iftype type)
f0706e82 1469{
239281f8
RL		 1470 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1471 0xff, 0xff, 0xff};
1472
75636525
JB		 1473 /* clear type-dependent union */
1474 memset(&sdata->u, 0, sizeof(sdata->u));
1475
1476 /* and set some type-dependent values */
1477 sdata->vif.type = type;
2ca27bcf 1478 sdata->vif.p2p = false;
60719ffd 1479 sdata->wdev.iftype = type;
75636525 1480
a621fa4d
JB		 1481 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1482 sdata->control_port_no_encrypt = false;
7f3f96ce
MT		 1483 sdata->control_port_over_nl80211 = false;
1484 sdata->control_port_no_preauth = false;
2475b1cc 1485 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1486 sdata->vif.bss_conf.idle = true;
db6d9e9e 1487 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
a621fa4d 1488
b53be792
SW		 1489 sdata->noack_map = 0;
1490
f142c6b9
JB		 1491 /* only monitor/p2p-device differ */
1492 if (sdata->dev) {
1493 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1494 sdata->dev->type = ARPHRD_ETHER;
1495 }
75636525 1496
35f20c14 1497 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1498 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1499 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1500 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1501 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1502 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1503
75636525 1504 switch (type) {
2ca27bcf
JB		 1505 case NL80211_IFTYPE_P2P_GO:
1506 type = NL80211_IFTYPE_AP;
1507 sdata->vif.type = type;
1508 sdata->vif.p2p = true;
fc0561dc 1509 fallthrough;
05c914fe 1510 case NL80211_IFTYPE_AP:
d012a605 1511 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1512 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1513 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1514 break;
2ca27bcf
JB		 1515 case NL80211_IFTYPE_P2P_CLIENT:
1516 type = NL80211_IFTYPE_STATION;
1517 sdata->vif.type = type;
1518 sdata->vif.p2p = true;
fc0561dc 1519 fallthrough;
05c914fe 1520 case NL80211_IFTYPE_STATION:
ad2d223a 1521 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1522 ieee80211_sta_setup_sdata(sdata);
472dbc45 1523 break;
6e0bd6c3 1524 case NL80211_IFTYPE_OCB:
239281f8
RL		 1525 sdata->vif.bss_conf.bssid = bssid_wildcard;
1526 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1527 break;
46900298 1528 case NL80211_IFTYPE_ADHOC:
ad2d223a 1529 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1530 ieee80211_ibss_setup_sdata(sdata);
1531 break;
05c914fe 1532 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1533 if (ieee80211_vif_is_mesh(&sdata->vif))
1534 ieee80211_mesh_init_sdata(sdata);
1535 break;
05c914fe 1536 case NL80211_IFTYPE_MONITOR:
75636525 1537 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1538 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1539 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1540 MONITOR_FLAG_OTHER_BSS;
1541 break;
167e33f4
AB		 1542 case NL80211_IFTYPE_NAN:
1543 idr_init(&sdata->u.nan.function_inst_ids);
1544 spin_lock_init(&sdata->u.nan.func_lock);
1545 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1546 break;
05c914fe 1547 case NL80211_IFTYPE_AP_VLAN:
98104fde 1548 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1549 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1550 break;
05c914fe 1551 case NL80211_IFTYPE_UNSPECIFIED:
70d9c599 1552 case NL80211_IFTYPE_WDS:
2e161f78 1553 case NUM_NL80211_IFTYPES:
c7976f52 1554 WARN_ON(1);
75636525
JB		 1555 break;
1556 }
1557
1558 ieee80211_debugfs_add_netdev(sdata);
1559}
1560
34d4bc4d
JB		 1561static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1562 enum nl80211_iftype type)
1563{
1564 struct ieee80211_local *local = sdata->local;
1565 int ret, err;
2ca27bcf
JB		 1566 enum nl80211_iftype internal_type = type;
1567 bool p2p = false;
34d4bc4d
JB		 1568
1569 ASSERT_RTNL();
1570
1571 if (!local->ops->change_interface)
1572 return -EBUSY;
1573
1574 switch (sdata->vif.type) {
1575 case NL80211_IFTYPE_AP:
1576 case NL80211_IFTYPE_STATION:
1577 case NL80211_IFTYPE_ADHOC:
239281f8 1578 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1579 /*
1580 * Could maybe also all others here?
1581 * Just not sure how that interacts
1582 * with the RX/config path e.g. for
1583 * mesh.
1584 */
1585 break;
1586 default:
1587 return -EBUSY;
1588 }
1589
1590 switch (type) {
1591 case NL80211_IFTYPE_AP:
1592 case NL80211_IFTYPE_STATION:
1593 case NL80211_IFTYPE_ADHOC:
239281f8 1594 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1595 /*
1596 * Could probably support everything
70d9c599 1597 * but here.
34d4bc4d
JB		 1598 */
1599 break;
2ca27bcf
JB		 1600 case NL80211_IFTYPE_P2P_CLIENT:
1601 p2p = true;
1602 internal_type = NL80211_IFTYPE_STATION;
1603 break;
1604 case NL80211_IFTYPE_P2P_GO:
1605 p2p = true;
1606 internal_type = NL80211_IFTYPE_AP;
1607 break;
34d4bc4d
JB		 1608 default:
1609 return -EBUSY;
1610 }
1611
2ca27bcf 1612 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1613 if (ret)
1614 return ret;
1615
054c9939
JB		 1616 ieee80211_stop_vif_queues(local, sdata,
1617 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1618 synchronize_net();
1619
34d4bc4d
JB		 1620 ieee80211_do_stop(sdata, false);
1621
f142c6b9 1622 ieee80211_teardown_sdata(sdata);
34d4bc4d 1623
6aea26ce 1624 ieee80211_set_sdata_offload_flags(sdata);
2ca27bcf 1625 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1626 if (ret)
a9865538 1627 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1628
3a25a8c8
JB		 1629 /*
1630 * Ignore return value here, there's not much we can do since
1631 * the driver changed the interface type internally already.
1632 * The warnings will hopefully make driver authors fix it :-)
1633 */
a9865538 1634 ieee80211_check_queues(sdata, type);
3a25a8c8 1635
34d4bc4d 1636 ieee80211_setup_sdata(sdata, type);
6aea26ce 1637 ieee80211_set_vif_encap_ops(sdata);
34d4bc4d 1638
f142c6b9 1639 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1640 WARN(err, "type change: do_open returned %d", err);
1641
054c9939
JB		 1642 ieee80211_wake_vif_queues(local, sdata,
1643 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
34d4bc4d
JB		 1644 return ret;
1645}
1646
f3947e2d 1647int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1648 enum nl80211_iftype type)
75636525 1649{
34d4bc4d
JB		 1650 int ret;
1651
f3947e2d
JB		 1652 ASSERT_RTNL();
1653
2ca27bcf 1654 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1655 return 0;
1656
34d4bc4d
JB		 1657 if (ieee80211_sdata_running(sdata)) {
1658 ret = ieee80211_runtime_change_iftype(sdata, type);
1659 if (ret)
1660 return ret;
1661 } else {
1662 /* Purge and reset type-dependent state. */
f142c6b9 1663 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1664 ieee80211_setup_sdata(sdata, type);
1665 }
75636525
JB		 1666
1667 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1668 if (type == NL80211_IFTYPE_STATION)
1669 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1670
1671 return 0;
f0706e82
JB		 1672}
1673
fa9029f8 1674static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1675 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1676{
1677 struct ieee80211_sub_if_data *sdata;
1678 u64 mask, start, addr, val, inc;
1679 u8 *m;
1680 u8 tmp_addr[ETH_ALEN];
1681 int i;
1682
1683 /* default ... something at least */
f142c6b9 1684 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1685
1686 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1687 local->hw.wiphy->n_addresses <= 1)
1688 return;
1689
fa9029f8
JB		 1690 mutex_lock(&local->iflist_mtx);
1691
1692 switch (type) {
1693 case NL80211_IFTYPE_MONITOR:
1694 /* doesn't matter */
1695 break;
fa9029f8
JB		 1696 case NL80211_IFTYPE_AP_VLAN:
1697 /* match up with an AP interface */
1698 list_for_each_entry(sdata, &local->interfaces, list) {
1699 if (sdata->vif.type != NL80211_IFTYPE_AP)
1700 continue;
f142c6b9 1701 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1702 break;
1703 }
1704 /* keep default if no AP interface present */
1705 break;
6d71117a
JB		 1706 case NL80211_IFTYPE_P2P_CLIENT:
1707 case NL80211_IFTYPE_P2P_GO:
30686bf7 1708 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1709 list_for_each_entry(sdata, &local->interfaces, list) {
1710 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1711 continue;
1712 if (!ieee80211_sdata_running(sdata))
1713 continue;
1714 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1715 goto out_unlock;
1716 }
1717 }
fc0561dc 1718 fallthrough;
fa9029f8
JB		 1719 default:
1720 /* assign a new address if possible -- try n_addresses first */
1721 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1722 bool used = false;
1723
1724 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1725 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1726 sdata->vif.addr)) {
fa9029f8
JB		 1727 used = true;
1728 break;
1729 }
1730 }
1731
1732 if (!used) {
f142c6b9 1733 memcpy(perm_addr,
fa9029f8
JB		 1734 local->hw.wiphy->addresses[i].addr,
1735 ETH_ALEN);
1736 break;
1737 }
1738 }
1739
1740 /* try mask if available */
1741 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1742 break;
1743
1744 m = local->hw.wiphy->addr_mask;
1745 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1746 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1747 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1748
1749 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1750 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1751 pr_info("not contiguous\n");
fa9029f8
JB		 1752 break;
1753 }
1754
ac20976d
HS		 1755 /*
1756 * Pick address of existing interface in case user changed
1757 * MAC address manually, default to perm_addr.
1758 */
fa9029f8 1759 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1760 list_for_each_entry(sdata, &local->interfaces, list) {
1761 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1762 continue;
1763 m = sdata->vif.addr;
1764 break;
1765 }
fa9029f8
JB		 1766 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1767 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1768 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1769
1770 inc = 1ULL<<__ffs64(mask);
1771 val = (start & mask);
1772 addr = (start & ~mask) | (val & mask);
1773 do {
1774 bool used = false;
1775
1776 tmp_addr[5] = addr >> 0*8;
1777 tmp_addr[4] = addr >> 1*8;
1778 tmp_addr[3] = addr >> 2*8;
1779 tmp_addr[2] = addr >> 3*8;
1780 tmp_addr[1] = addr >> 4*8;
1781 tmp_addr[0] = addr >> 5*8;
1782
1783 val += inc;
1784
1785 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1786 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1787 used = true;
1788 break;
1789 }
1790 }
1791
1792 if (!used) {
f142c6b9 1793 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1794 break;
1795 }
1796 addr = (start & ~mask) | (val & mask);
1797 } while (addr != start);
1798
1799 break;
1800 }
1801
6d71117a 1802 out_unlock:
fa9029f8
JB		 1803 mutex_unlock(&local->iflist_mtx);
1804}
1805
3e122be0 1806int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1807 unsigned char name_assign_type,
84efbb84 1808 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1809 struct vif_params *params)
f0706e82 1810{
f142c6b9 1811 struct net_device *ndev = NULL;
f0706e82 1812 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1813 struct txq_info *txqi;
80a83cfc 1814 void (*if_setup)(struct net_device *dev);
75636525 1815 int ret, i;
ded81f6b 1816 int txqs = 1;
f0706e82
JB		 1817
1818 ASSERT_RTNL();
75636525 1819
708d50ed 1820 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1821 struct wireless_dev *wdev;
1822
1823 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1824 GFP_KERNEL);
1825 if (!sdata)
1826 return -ENOMEM;
1827 wdev = &sdata->wdev;
1828
1829 sdata->dev = NULL;
1830 strlcpy(sdata->name, name, IFNAMSIZ);
1831 ieee80211_assign_perm_addr(local, wdev->address, type);
1832 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1833 } else {
ba8c3d6f
FF		 1834 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1835 sizeof(void *));
1836 int txq_size = 0;
1837
79af1f86
JB		 1838 if (local->ops->wake_tx_queue &&
1839 type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 1840 (type != NL80211_IFTYPE_MONITOR ||
1841 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 1842 txq_size += sizeof(struct txq_info) +
1843 local->hw.txq_data_size;
1844
dbd50a85 1845 if (local->ops->wake_tx_queue) {
80a83cfc 1846 if_setup = ieee80211_if_setup_no_queue;
dbd50a85 1847 } else {
80a83cfc 1848 if_setup = ieee80211_if_setup;
dbd50a85
JB		 1849 if (local->hw.queues >= IEEE80211_NUM_ACS)
1850 txqs = IEEE80211_NUM_ACS;
1851 }
f142c6b9 1852
ba8c3d6f 1853 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1854 name, name_assign_type,
80a83cfc 1855 if_setup, txqs, 1);
f142c6b9
JB		 1856 if (!ndev)
1857 return -ENOMEM;
1f6e0baa
JC		 1858
1859 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1860 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1861
f142c6b9
JB		 1862 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1863
5a490510
JB		 1864 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1865 if (!ndev->tstats) {
1866 free_netdev(ndev);
1867 return -ENOMEM;
1868 }
1869
f142c6b9
JB		 1870 ndev->needed_headroom = local->tx_headroom +
1871 4*6 /* four MAC addresses */
1872 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1873 + 6 /* mesh */
1874 + 8 /* rfc1042/bridge tunnel */
1875 - ETH_HLEN /* ethernet hard_header_len */
1876 + IEEE80211_ENCRYPT_HEADROOM;
1877 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1878
1879 ret = dev_alloc_name(ndev, ndev->name);
1880 if (ret < 0) {
e6436be2 1881 ieee80211_if_free(ndev);
c7a61cba 1882 free_netdev(ndev);
f142c6b9
JB		 1883 return ret;
1884 }
1885
1886 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 1887 if (is_valid_ether_addr(params->macaddr))
b5dfae02
BG		 1888 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1889 else
1890 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1891 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1892
1893 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1894 sdata = netdev_priv(ndev);
1895 ndev->ieee80211_ptr = &sdata->wdev;
1896 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1897 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1898
ba8c3d6f
FF		 1899 if (txq_size) {
1900 txqi = netdev_priv(ndev) + size;
fa962b92 1901 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1902 }
1903
f142c6b9
JB		 1904 sdata->dev = ndev;
1905 }
75636525
JB		 1906
1907 /* initialise type-independent data */
f0706e82 1908 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1909 sdata->local = local;
75636525 1910
033d9008 1911 ieee80211_init_frag_cache(&sdata->frags);
75636525
JB		 1912
1913 INIT_LIST_HEAD(&sdata->key_list);
1914
164eb02d
SW		 1915 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1916 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1917 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1918 ieee80211_delayed_tailroom_dec);
97f97b1f 1919
57fbcce3 1920 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1921 struct ieee80211_supported_band *sband;
1922 sband = local->hw.wiphy->bands[i];
1923 sdata->rc_rateidx_mask[i] =
1924 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1925 if (sband) {
1926 __le16 cap;
1927 u16 *vht_rate_mask;
1928
19468413
SW		 1929 memcpy(sdata->rc_rateidx_mcs_mask[i],
1930 sband->ht_cap.mcs.rx_mask,
1931 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1932
1933 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1934 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1935 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1936 } else {
19468413
SW		 1937 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1938 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1939 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1940 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1941 }
37eb0b16 1942 }
75636525 1943
3a25a8c8
JB		 1944 ieee80211_set_default_queues(sdata);
1945
1ea6f9c0
JB		 1946 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1947 sdata->user_power_level = local->user_power_level;
1948
2475b1cc
MS		 1949 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1950
75636525
JB		 1951 /* setup type-dependent data */
1952 ieee80211_setup_sdata(sdata, type);
f0706e82 1953
f142c6b9 1954 if (ndev) {
dd665d23
JB		 1955 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1956 if (type == NL80211_IFTYPE_STATION)
1957 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 1958
f142c6b9 1959 ndev->features |= local->hw.netdev_features;
07b83d2e
JB		 1960 ndev->hw_features |= ndev->features &
1961 MAC80211_SUPPORTED_FEATURES_TX;
72d78728 1962
b7ffbd7e
JB		 1963 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1964
9c22b4a3
JW		 1965 /* MTU range: 256 - 2304 */
1966 ndev->min_mtu = 256;
06354665 1967 ndev->max_mtu = local->hw.max_mtu;
9c22b4a3 1968
f142c6b9
JB		 1969 ret = register_netdevice(ndev);
1970 if (ret) {
cf124db5 1971 free_netdev(ndev);
f142c6b9
JB		 1972 return ret;
1973 }
1974 }
f0706e82 1975
c771c9d8 1976 mutex_lock(&local->iflist_mtx);
79010420 1977 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1978 mutex_unlock(&local->iflist_mtx);
79010420 1979
84efbb84
JB		 1980 if (new_wdev)
1981 *new_wdev = &sdata->wdev;
f0706e82 1982
f0706e82 1983 return 0;
f0706e82
JB		 1984}
1985
f698d856 1986void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1987{
f0706e82 1988 ASSERT_RTNL();
11a843b7 1989
c771c9d8 1990 mutex_lock(&sdata->local->iflist_mtx);
75636525 1991 list_del_rcu(&sdata->list);
c771c9d8
JB		 1992 mutex_unlock(&sdata->local->iflist_mtx);
1993
f1267cf3
BP		 1994 if (sdata->vif.txq)
1995 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1996
75636525 1997 synchronize_rcu();
f142c6b9
JB		 1998
1999 if (sdata->dev) {
2000 unregister_netdevice(sdata->dev);
2001 } else {
2002 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 2003 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 2004 kfree(sdata);
2005 }
2006}
2007
2008void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2009{
2010 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2011 return;
2012 ieee80211_do_stop(sdata, true);
f0706e82
JB		 2013}
2014
75636525 2015void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 2016{
75636525 2017 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 2018 LIST_HEAD(unreg_list);
f142c6b9 2019 LIST_HEAD(wdev_list);
f0706e82
JB		 2020
2021 ASSERT_RTNL();
2022
d8d9008c
JB		 2023 /* Before destroying the interfaces, make sure they're all stopped so
2024 * that the hardware is stopped. Otherwise, the driver might still be
2025 * iterating the interfaces during the shutdown, e.g. from a worker
2026 * or from RX processing or similar, and if it does so (using atomic
2027 * iteration) while we're manipulating the list, the iteration will
2028 * crash.
2029 *
2030 * After this, the hardware should be stopped and the driver should
2031 * have stopped all of its activities, so that we can do RCU-unaware
2032 * manipulations of the interface list below.
c8aa22db 2033 */
d8d9008c
JB		 2034 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2035
2036 WARN(local->open_count, "%s: open count remains %d\n",
2037 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 2038
a50e5fb8
SS		 2039 ieee80211_txq_teardown_flows(local);
2040
efe117ab 2041 mutex_lock(&local->iflist_mtx);
75636525
JB		 2042 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2043 list_del(&sdata->list);
c771c9d8 2044
f142c6b9
JB		 2045 if (sdata->dev)
2046 unregister_netdevice_queue(sdata->dev, &unreg_list);
2047 else
2048 list_add(&sdata->list, &wdev_list);
f0706e82 2049 }
efe117ab
ED		 2050 mutex_unlock(&local->iflist_mtx);
2051 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 2052
2053 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2054 list_del(&sdata->list);
2055 cfg80211_unregister_wdev(&sdata->wdev);
2056 kfree(sdata);
2057 }
f0706e82 2058}
5cff20e6 2059
47846c9b 2060static int netdev_notify(struct notifier_block *nb,
351638e7 2061 unsigned long state, void *ptr)
47846c9b 2062{
351638e7 2063 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 2064 struct ieee80211_sub_if_data *sdata;
2065
2066 if (state != NETDEV_CHANGENAME)
8bd811aa 2067 return NOTIFY_DONE;
47846c9b
JB		 2068
2069 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 2070 return NOTIFY_DONE;
47846c9b
JB		 2071
2072 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2073 return NOTIFY_DONE;
47846c9b
JB		 2074
2075 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2076 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2077 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2078
2079 return NOTIFY_OK;
47846c9b
JB		 2080}
2081
2082static struct notifier_block mac80211_netdev_notifier = {
2083 .notifier_call = netdev_notify,
2084};
2085
2086int ieee80211_iface_init(void)
2087{
2088 return register_netdevice_notifier(&mac80211_netdev_notifier);
2089}
2090
2091void ieee80211_iface_exit(void)
2092{
2093 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2094}
72f15d53
MB		 2095
2096void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2097{
2098 if (sdata->vif.type == NL80211_IFTYPE_AP)
2099 atomic_inc(&sdata->u.ap.num_mcast_sta);
2100 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2101 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2102}
2103
2104void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2105{
2106 if (sdata->vif.type == NL80211_IFTYPE_AP)
2107 atomic_dec(&sdata->u.ap.num_mcast_sta);
2108 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2109 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2110}
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