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Merge tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[mirror_ubuntu-hirsute-kernel.git] / net / mac80211 / iface.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
f0706e82 2/*
c5d54fbf 3 * Interface handling
0d143fe1 4 *
f0706e82
JB		 5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 9 * Copyright 2013-2014 Intel Mobile Communications GmbH
d2941df8 10 * Copyright (c) 2016 Intel Deutschland GmbH
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
85416a4f
CL		 351void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
352 const int offset)
353{
354 struct ieee80211_local *local = sdata->local;
d8212184 355 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 356
357#define ADJUST(_f, _s) do { \
358 if (flags & MONITOR_FLAG_##_f) \
359 local->fif_##_s += offset; \
360 } while (0)
361
362 ADJUST(FCSFAIL, fcsfail);
363 ADJUST(PLCPFAIL, plcpfail);
364 ADJUST(CONTROL, control);
365 ADJUST(CONTROL, pspoll);
366 ADJUST(OTHER_BSS, other_bss);
367
368#undef ADJUST
369}
370
3a25a8c8
JB		 371static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
372{
373 struct ieee80211_local *local = sdata->local;
374 int i;
375
376 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 379 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 380 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 381 else
382 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 383 }
384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
385}
386
3c3e21e7 387int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 388{
389 struct ieee80211_sub_if_data *sdata;
8b305780 390 int ret;
4b6f1dd6 391
30686bf7 392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 393 return 0;
394
8b305780 395 ASSERT_RTNL();
685fb72b 396
4b6f1dd6 397 if (local->monitor_sdata)
8b305780 398 return 0;
4b6f1dd6
JB		 399
400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 401 if (!sdata)
402 return -ENOMEM;
4b6f1dd6
JB		 403
404 /* set up data */
405 sdata->local = local;
406 sdata->vif.type = NL80211_IFTYPE_MONITOR;
407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
408 wiphy_name(local->hw.wiphy));
34171dc0 409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 410
2475b1cc
MS		 411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
412
3a25a8c8
JB		 413 ieee80211_set_default_queues(sdata);
414
4b6f1dd6
JB		 415 ret = drv_add_interface(local, sdata);
416 if (WARN_ON(ret)) {
417 /* ok .. stupid driver, it asked for this! */
418 kfree(sdata);
8b305780 419 return ret;
4b6f1dd6
JB		 420 }
421
a9865538 422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 423 if (ret) {
424 kfree(sdata);
8b305780 425 return ret;
3a25a8c8
JB		 426 }
427
fab57a6c
JB		 428 mutex_lock(&local->iflist_mtx);
429 rcu_assign_pointer(local->monitor_sdata, sdata);
430 mutex_unlock(&local->iflist_mtx);
431
34a3740d 432 mutex_lock(&local->mtx);
4bf88530 433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 434 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 435 mutex_unlock(&local->mtx);
55de908a 436 if (ret) {
fab57a6c 437 mutex_lock(&local->iflist_mtx);
0c2bef46 438 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 439 mutex_unlock(&local->iflist_mtx);
440 synchronize_net();
55de908a
JB		 441 drv_remove_interface(local, sdata);
442 kfree(sdata);
8b305780 443 return ret;
55de908a
JB		 444 }
445
42bd20d9
AE		 446 skb_queue_head_init(&sdata->skb_queue);
447 INIT_WORK(&sdata->work, ieee80211_iface_work);
448
8b305780 449 return 0;
4b6f1dd6
JB		 450}
451
3c3e21e7 452void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 453{
454 struct ieee80211_sub_if_data *sdata;
455
30686bf7 456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 457 return;
458
8b305780
JB		 459 ASSERT_RTNL();
460
685fb72b 461 mutex_lock(&local->iflist_mtx);
4b6f1dd6 462
685fb72b
JB		 463 sdata = rcu_dereference_protected(local->monitor_sdata,
464 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 465 if (!sdata) {
466 mutex_unlock(&local->iflist_mtx);
467 return;
468 }
4b6f1dd6 469
0c2bef46 470 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 471 mutex_unlock(&local->iflist_mtx);
472
4b6f1dd6
JB		 473 synchronize_net();
474
34a3740d 475 mutex_lock(&local->mtx);
55de908a 476 ieee80211_vif_release_channel(sdata);
34a3740d 477 mutex_unlock(&local->mtx);
55de908a 478
4b6f1dd6
JB		 479 drv_remove_interface(local, sdata);
480
481 kfree(sdata);
482}
483
34d4bc4d
JB		 484/*
485 * NOTE: Be very careful when changing this function, it must NOT return
486 * an error on interface type changes that have been pre-checked, so most
487 * checks should be in ieee80211_check_concurrent_iface.
488 */
f142c6b9 489int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 490{
f142c6b9
JB		 491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
492 struct net_device *dev = wdev->netdev;
87490f6d
JB		 493 struct ieee80211_local *local = sdata->local;
494 struct sta_info *sta;
495 u32 changed = 0;
496 int res;
497 u32 hw_reconf_flags = 0;
498
0d143fe1
JB		 499 switch (sdata->vif.type) {
500 case NL80211_IFTYPE_WDS:
501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
502 return -ENOLINK;
503 break;
665c93a9
JB		 504 case NL80211_IFTYPE_AP_VLAN: {
505 struct ieee80211_sub_if_data *master;
506
0d143fe1
JB		 507 if (!sdata->bss)
508 return -ENOLINK;
665c93a9 509
4e141dad 510 mutex_lock(&local->mtx);
0d143fe1 511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 512 mutex_unlock(&local->mtx);
665c93a9
JB		 513
514 master = container_of(sdata->bss,
515 struct ieee80211_sub_if_data, u.ap);
516 sdata->control_port_protocol =
517 master->control_port_protocol;
518 sdata->control_port_no_encrypt =
519 master->control_port_no_encrypt;
018f6fbf
DK		 520 sdata->control_port_over_nl80211 =
521 master->control_port_over_nl80211;
7f3f96ce
MT		 522 sdata->control_port_no_preauth =
523 master->control_port_no_preauth;
1351c5d3
JB		 524 sdata->vif.cab_queue = master->vif.cab_queue;
525 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
526 sizeof(sdata->vif.hw_queue));
2967e031 527 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 528
529 mutex_lock(&local->key_mtx);
530 sdata->crypto_tx_tailroom_needed_cnt +=
531 master->crypto_tx_tailroom_needed_cnt;
532 mutex_unlock(&local->key_mtx);
533
0d143fe1 534 break;
665c93a9 535 }
0d143fe1
JB		 536 case NL80211_IFTYPE_AP:
537 sdata->bss = &sdata->u.ap;
538 break;
539 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 540 case NL80211_IFTYPE_STATION:
541 case NL80211_IFTYPE_MONITOR:
542 case NL80211_IFTYPE_ADHOC:
f142c6b9 543 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 544 case NL80211_IFTYPE_OCB:
cb3b7d87 545 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 546 /* no special treatment */
547 break;
548 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 549 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 550 case NL80211_IFTYPE_P2P_CLIENT:
551 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 552 /* cannot happen */
553 WARN_ON(1);
554 break;
555 }
556
557 if (local->open_count == 0) {
24487981 558 res = drv_start(local);
0d143fe1
JB		 559 if (res)
560 goto err_del_bss;
e8975581
JB		 561 /* we're brought up, everything changes */
562 hw_reconf_flags = ~0;
1f87f7d3 563 ieee80211_led_radio(local, true);
67408c8c
JB		 564 ieee80211_mod_tpt_led_trig(local,
565 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 566 }
567
568 /*
bf533e0b
JB		 569 * Copy the hopefully now-present MAC address to
570 * this interface, if it has the special null one.
0d143fe1 571 */
f142c6b9 572 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 573 memcpy(dev->dev_addr,
574 local->hw.wiphy->perm_addr,
575 ETH_ALEN);
576 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
577
578 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 579 res = -EADDRNOTAVAIL;
580 goto err_stop;
0adc23f5 581 }
0d143fe1
JB		 582 }
583
0d143fe1
JB		 584 switch (sdata->vif.type) {
585 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 586 /* no need to tell driver, but set carrier and chanctx */
587 if (rtnl_dereference(sdata->bss->beacon)) {
588 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 589 netif_carrier_on(dev);
4d76d21b 590 } else {
3edaf3e6 591 netif_carrier_off(dev);
4d76d21b 592 }
0d143fe1
JB		 593 break;
594 case NL80211_IFTYPE_MONITOR:
d8212184 595 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 596 local->cooked_mntrs++;
597 break;
598 }
599
d8212184 600 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 601 res = drv_add_interface(local, sdata);
602 if (res)
603 goto err_stop;
604 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 605 res = ieee80211_add_virtual_monitor(local);
606 if (res)
607 goto err_stop;
608 }
609
0d143fe1
JB		 610 /* must be before the call to ieee80211_configure_filter */
611 local->monitors++;
e8975581 612 if (local->monitors == 1) {
0869aea0
JB		 613 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
614 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 615 }
0d143fe1 616
85416a4f 617 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 618 ieee80211_configure_filter(local);
801d929c
FF		 619 mutex_lock(&local->mtx);
620 ieee80211_recalc_idle(local);
621 mutex_unlock(&local->mtx);
53e9b1de
DG		 622
623 netif_carrier_on(dev);
0d143fe1 624 break;
0d143fe1 625 default:
34d4bc4d 626 if (coming_up) {
075e0847
JB		 627 ieee80211_del_virtual_monitor(local);
628
7b7eab6f 629 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 630 if (res)
631 goto err_stop;
a9865538
JB		 632 res = ieee80211_check_queues(sdata,
633 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 634 if (res)
635 goto err_del_interface;
34d4bc4d 636 }
0d143fe1 637
29cbe68c 638 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 639 local->fif_pspoll++;
7be5086d 640 local->fif_probe_req++;
e3b90ca2 641
e3b90ca2 642 ieee80211_configure_filter(local);
7be5086d
JB		 643 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
644 local->fif_probe_req++;
a3c9aa51 645 }
e3b90ca2 646
708d50ed
AB		 647 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
648 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 649 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 650 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 651
c405c629
JB		 652 switch (sdata->vif.type) {
653 case NL80211_IFTYPE_STATION:
654 case NL80211_IFTYPE_ADHOC:
655 case NL80211_IFTYPE_AP:
656 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 657 case NL80211_IFTYPE_OCB:
0d143fe1 658 netif_carrier_off(dev);
c405c629 659 break;
1411af15 660 case NL80211_IFTYPE_WDS:
f142c6b9 661 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 662 case NL80211_IFTYPE_NAN:
1411af15 663 break;
c405c629 664 default:
a2310824
JB		 665 /* not reached */
666 WARN_ON(1);
c405c629 667 }
59034591
EP		 668
669 /*
cec66283 670 * Set default queue parameters so drivers don't
59034591 671 * need to initialise the hardware if the hardware
cec66283
JB		 672 * doesn't start up with sane defaults.
673 * Enable QoS for anything but station interfaces.
59034591 674 */
cec66283
JB		 675 ieee80211_set_wmm_default(sdata, true,
676 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 677 }
678
2d2080c3
JB		 679 set_bit(SDATA_STATE_RUNNING, &sdata->state);
680
f64331d5
JB		 681 switch (sdata->vif.type) {
682 case NL80211_IFTYPE_WDS:
0d143fe1
JB		 683 /* Create STA entry for the WDS peer */
684 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
685 GFP_KERNEL);
686 if (!sta) {
687 res = -ENOMEM;
688 goto err_del_interface;
689 }
690
83d5cc01
JB		 691 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
692 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
693 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 694
695 res = sta_info_insert(sta);
696 if (res) {
697 /* STA has been freed */
698 goto err_del_interface;
699 }
1be7fe8d
BJ		 700
701 rate_control_rate_init(sta);
1411af15 702 netif_carrier_on(dev);
f64331d5
JB		 703 break;
704 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9 705 rcu_assign_pointer(local->p2p_sdata, sdata);
f64331d5
JB		 706 break;
707 case NL80211_IFTYPE_MONITOR:
708 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
709 break;
710 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
711 break;
712 default:
713 break;
0d143fe1
JB		 714 }
715
0d143fe1
JB		 716 /*
717 * set_multicast_list will be invoked by the networking core
718 * which will check whether any increments here were done in
719 * error and sync them down to the hardware as filter flags.
720 */
721 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
722 atomic_inc(&local->iff_allmultis);
723
34d4bc4d
JB		 724 if (coming_up)
725 local->open_count++;
726
59034591 727 if (hw_reconf_flags)
e8975581 728 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 729
4a733ef1 730 ieee80211_recalc_ps(local);
965bedad 731
2b436312 732 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
7d65f829
JB		 733 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
734 local->ops->wake_tx_queue) {
2b436312 735 /* XXX: for AP_VLAN, actually track AP queues */
89e9bfc4
CL		 736 if (dev)
737 netif_tx_start_all_queues(dev);
2b436312 738 } else if (dev) {
2b730daa
JB		 739 unsigned long flags;
740 int n_acs = IEEE80211_NUM_ACS;
741 int ac;
742
743 if (local->hw.queues < IEEE80211_NUM_ACS)
744 n_acs = 1;
745
746 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
747 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
748 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
749 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
750 for (ac = 0; ac < n_acs; ac++) {
751 int ac_queue = sdata->vif.hw_queue[ac];
752
753 if (local->queue_stop_reasons[ac_queue] == 0 &&
754 skb_queue_empty(&local->pending[ac_queue]))
755 netif_start_subqueue(dev, ac);
756 }
757 }
758 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
759 }
0d143fe1
JB		 760
761 return 0;
762 err_del_interface:
7b7eab6f 763 drv_remove_interface(local, sdata);
0d143fe1 764 err_stop:
24487981
JB		 765 if (!local->open_count)
766 drv_stop(local);
0d143fe1
JB		 767 err_del_bss:
768 sdata->bss = NULL;
4e141dad
MK		 769 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
770 mutex_lock(&local->mtx);
0d143fe1 771 list_del(&sdata->u.vlan.list);
4e141dad
MK		 772 mutex_unlock(&local->mtx);
773 }
4d6c36fa 774 /* might already be clear but that doesn't matter */
2d2080c3 775 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 776 return res;
777}
778
34d4bc4d 779static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 780{
781 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 782 int err;
783
784 /* fail early if user set an invalid address */
2fcf2824 785 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 786 return -EADDRNOTAVAIL;
787
788 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
789 if (err)
790 return err;
791
f142c6b9 792 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 793}
794
795static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
796 bool going_down)
797{
0d143fe1 798 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 799 unsigned long flags;
800 struct sk_buff *skb, *tmp;
e8975581 801 u32 hw_reconf_flags = 0;
09f4114e 802 int i, flushed;
397a7a24 803 struct ps_data *ps;
d2859df5 804 struct cfg80211_chan_def chandef;
46238845 805 bool cancel_scan;
167e33f4 806 struct cfg80211_nan_func *func;
0d143fe1 807
c29acf20
RM		 808 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
809
46238845
JB		 810 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
811 if (cancel_scan)
352ffad6
BC		 812 ieee80211_scan_cancel(local);
813
0d143fe1
JB		 814 /*
815 * Stop TX on this interface first.
816 */
f142c6b9
JB		 817 if (sdata->dev)
818 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 819
c8f994ee 820 ieee80211_roc_purge(local, sdata);
af6b6374 821
8ffcc704
EG		 822 switch (sdata->vif.type) {
823 case NL80211_IFTYPE_STATION:
572078be 824 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 825 break;
826 case NL80211_IFTYPE_ADHOC:
cd7760e6 827 ieee80211_ibss_stop(sdata);
8ffcc704 828 break;
f64331d5
JB		 829 case NL80211_IFTYPE_MONITOR:
830 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
831 break;
832 list_del_rcu(&sdata->u.mntr.list);
833 break;
8ffcc704
EG		 834 default:
835 break;
836 }
cd7760e6 837
0d143fe1
JB		 838 /*
839 * Remove all stations associated with this interface.
840 *
841 * This must be done before calling ops->remove_interface()
842 * because otherwise we can later invoke ops->sta_notify()
843 * whenever the STAs are removed, and that invalidates driver
844 * assumptions about always getting a vif pointer that is valid
845 * (because if we remove a STA after ops->remove_interface()
846 * the driver will have removed the vif info already!)
847 *
5eb8f4d7
JB		 848 * In WDS mode a station must exist here and be flushed, for
849 * AP_VLANs stations may exist since there's nothing else that
850 * would have removed them, but in other modes there shouldn't
851 * be any stations.
0d143fe1 852 */
d34ba216 853 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 854 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
855 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
856 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 857
df140465 858 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 859 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
860 atomic_dec(&local->iff_allmultis);
861
7be5086d 862 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 863 local->fif_pspoll--;
7be5086d
JB		 864 local->fif_probe_req--;
865 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
866 local->fif_probe_req--;
867 }
e3b90ca2 868
f142c6b9
JB		 869 if (sdata->dev) {
870 netif_addr_lock_bh(sdata->dev);
871 spin_lock_bh(&local->filter_lock);
872 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
873 sdata->dev->addr_len);
874 spin_unlock_bh(&local->filter_lock);
875 netif_addr_unlock_bh(sdata->dev);
f142c6b9 876 }
3ac64bee 877
7cbf0ba5
VN		 878 del_timer_sync(&local->dynamic_ps_timer);
879 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 880
04ecd257 881 cancel_work_sync(&sdata->recalc_smps);
dbd72850 882 sdata_lock(sdata);
59af6928 883 mutex_lock(&local->mtx);
73da7d5b 884 sdata->vif.csa_active = false;
0c21e632
LC		 885 if (sdata->vif.type == NL80211_IFTYPE_STATION)
886 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 887 if (sdata->csa_block_tx) {
888 ieee80211_wake_vif_queues(local, sdata,
889 IEEE80211_QUEUE_STOP_REASON_CSA);
890 sdata->csa_block_tx = false;
891 }
59af6928 892 mutex_unlock(&local->mtx);
dbd72850 893 sdata_unlock(sdata);
59af6928 894
73da7d5b 895 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 896
164eb02d
SW		 897 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
898
899 if (sdata->wdev.cac_started) {
d2859df5 900 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 901 WARN_ON(local->suspended);
34a3740d 902 mutex_lock(&local->mtx);
164eb02d 903 ieee80211_vif_release_channel(sdata);
34a3740d 904 mutex_unlock(&local->mtx);
d2859df5
JD		 905 cfg80211_cac_event(sdata->dev, &chandef,
906 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 907 GFP_KERNEL);
908 }
909
0d143fe1
JB		 910 /* APs need special treatment */
911 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 912 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 913
914 /* down all dependent devices, that is VLANs */
57c9fff3 915 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 916 u.vlan.list)
917 dev_close(vlan->dev);
918 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 919 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
920 /* remove all packets in parent bc_buf pointing to this dev */
921 ps = &sdata->bss->ps;
922
923 spin_lock_irqsave(&ps->bc_buf.lock, flags);
924 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
925 if (skb->dev == sdata->dev) {
926 __skb_unlink(skb, &ps->bc_buf);
927 local->total_ps_buffered--;
928 ieee80211_free_txskb(&local->hw, skb);
929 }
930 }
931 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 932 }
933
34d4bc4d
JB		 934 if (going_down)
935 local->open_count--;
0d143fe1
JB		 936
937 switch (sdata->vif.type) {
938 case NL80211_IFTYPE_AP_VLAN:
4e141dad 939 mutex_lock(&local->mtx);
0d143fe1 940 list_del(&sdata->u.vlan.list);
4e141dad 941 mutex_unlock(&local->mtx);
0c2bef46 942 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 943 /* see comment in the default case below */
944 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 945 /* no need to tell driver */
946 break;
947 case NL80211_IFTYPE_MONITOR:
d8212184 948 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 949 local->cooked_mntrs--;
950 break;
951 }
952
953 local->monitors--;
e8975581 954 if (local->monitors == 0) {
0869aea0
JB		 955 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
956 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 957 }
0d143fe1 958
85416a4f 959 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 960 break;
167e33f4
AB		 961 case NL80211_IFTYPE_NAN:
962 /* clean all the functions */
963 spin_lock_bh(&sdata->u.nan.func_lock);
964
965 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
966 idr_remove(&sdata->u.nan.function_inst_ids, i);
967 cfg80211_free_nan_func(func);
968 }
969 idr_destroy(&sdata->u.nan.function_inst_ids);
970
971 spin_unlock_bh(&sdata->u.nan.func_lock);
972 break;
f142c6b9
JB		 973 case NL80211_IFTYPE_P2P_DEVICE:
974 /* relies on synchronize_rcu() below */
0c2bef46 975 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 976 /* fall through */
0d143fe1 977 default:
0b7dff4f 978 cancel_work_sync(&sdata->work);
35f20c14
JB		 979 /*
980 * When we get here, the interface is marked down.
7907c7d3 981 * Free the remaining keys, if there are any
10b68487
FF		 982 * (which can happen in AP mode if userspace sets
983 * keys before the interface is operating, and maybe
984 * also in WDS mode)
75de9113 985 *
7907c7d3
JB		 986 * Force the key freeing to always synchronize_net()
987 * to wait for the RX path in case it is using this
10b68487 988 * interface enqueuing frames at this very time on
75de9113 989 * another CPU.
35f20c14 990 */
7907c7d3 991 ieee80211_free_keys(sdata, true);
1861b845 992 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 993 }
994
5061b0c2
JB		 995 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
996 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
997 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
998 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
999 if (info->control.vif == &sdata->vif) {
1000 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 1001 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 1002 }
1003 }
1004 }
1005 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 1006
2a9e2579
JB		 1007 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1008 ieee80211_txq_remove_vlan(local, sdata);
53168215 1009
2a9e2579 1010 sdata->bss = NULL;
ba8c3d6f 1011
b2c0958b
JB		 1012 if (local->open_count == 0)
1013 ieee80211_clear_tx_pending(local);
1014
5c21e810
BG		 1015 sdata->vif.bss_conf.beacon_int = 0;
1016
b2c0958b
JB		 1017 /*
1018 * If the interface goes down while suspended, presumably because
1019 * the device was unplugged and that happens before our resume,
1020 * then the driver is already unconfigured and the remainder of
1021 * this function isn't needed.
1022 * XXX: what about WoWLAN? If the device has software state, e.g.
1023 * memory allocated, it might expect teardown commands from
1024 * mac80211 here?
1025 */
1026 if (local->suspended) {
1027 WARN_ON(local->wowlan);
1028 WARN_ON(rtnl_dereference(local->monitor_sdata));
1029 return;
1030 }
1031
1032 switch (sdata->vif.type) {
1033 case NL80211_IFTYPE_AP_VLAN:
1034 break;
1035 case NL80211_IFTYPE_MONITOR:
1036 if (local->monitors == 0)
1037 ieee80211_del_virtual_monitor(local);
1038
1039 mutex_lock(&local->mtx);
1040 ieee80211_recalc_idle(local);
1041 mutex_unlock(&local->mtx);
31eba5bc 1042
d8212184 1043 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1044 break;
1045
1046 /* fall through */
b2c0958b
JB		 1047 default:
1048 if (going_down)
1049 drv_remove_interface(local, sdata);
1050 }
1051
4a733ef1 1052 ieee80211_recalc_ps(local);
b2c0958b 1053
46238845
JB		 1054 if (cancel_scan)
1055 flush_delayed_work(&local->scan_work);
1056
b2c0958b
JB		 1057 if (local->open_count == 0) {
1058 ieee80211_stop_device(local);
1059
1060 /* no reconfiguring after stop! */
1061 return;
1062 }
1063
1064 /* do after stop to avoid reconfiguring when we stop anyway */
1065 ieee80211_configure_filter(local);
1066 ieee80211_hw_config(local, hw_reconf_flags);
1067
1068 if (local->monitors == local->open_count)
075e0847 1069 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1070}
1071
1072static int ieee80211_stop(struct net_device *dev)
1073{
1074 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1075
1076 ieee80211_do_stop(sdata, true);
5061b0c2 1077
0d143fe1
JB		 1078 return 0;
1079}
1080
1081static void ieee80211_set_multicast_list(struct net_device *dev)
1082{
0d143fe1 1083 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1084 struct ieee80211_local *local = sdata->local;
df140465 1085 int allmulti, sdata_allmulti;
0d143fe1
JB		 1086
1087 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1088 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1089
1090 if (allmulti != sdata_allmulti) {
1091 if (dev->flags & IFF_ALLMULTI)
1092 atomic_inc(&local->iff_allmultis);
1093 else
1094 atomic_dec(&local->iff_allmultis);
1095 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1096 }
1097
3b8d81e0 1098 spin_lock_bh(&local->filter_lock);
22bedad3 1099 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1100 spin_unlock_bh(&local->filter_lock);
3ac64bee 1101 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1102}
1103
75636525
JB		 1104/*
1105 * Called when the netdev is removed or, by the code below, before
1106 * the interface type changes.
1107 */
f142c6b9 1108static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1109{
1110 int i;
1111
75636525 1112 /* free extra data */
7907c7d3 1113 ieee80211_free_keys(sdata, false);
75636525 1114
aee14ceb
JM		 1115 ieee80211_debugfs_remove_netdev(sdata);
1116
f0706e82 1117 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1118 __skb_queue_purge(&sdata->fragments[i].skb_list);
1119 sdata->fragment_next = 0;
11a843b7 1120
b9dcf712 1121 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1122 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1123}
1124
f142c6b9
JB		 1125static void ieee80211_uninit(struct net_device *dev)
1126{
1127 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1128}
1129
cf0277e7 1130static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1131 struct sk_buff *skb,
a350ecce 1132 struct net_device *sb_dev)
cf0277e7
JB		 1133{
1134 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1135}
1136
bc1f4470 1137static void
5a490510
JB		 1138ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1139{
1140 int i;
1141
1142 for_each_possible_cpu(i) {
1143 const struct pcpu_sw_netstats *tstats;
1144 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1145 unsigned int start;
1146
1147 tstats = per_cpu_ptr(dev->tstats, i);
1148
1149 do {
1150 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1151 rx_packets = tstats->rx_packets;
1152 tx_packets = tstats->tx_packets;
1153 rx_bytes = tstats->rx_bytes;
1154 tx_bytes = tstats->tx_bytes;
1155 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1156
1157 stats->rx_packets += rx_packets;
1158 stats->tx_packets += tx_packets;
1159 stats->rx_bytes += rx_bytes;
1160 stats->tx_bytes += tx_bytes;
1161 }
5a490510
JB		 1162}
1163
587e729e
JB		 1164static const struct net_device_ops ieee80211_dataif_ops = {
1165 .ndo_open = ieee80211_open,
1166 .ndo_stop = ieee80211_stop,
f142c6b9 1167 .ndo_uninit = ieee80211_uninit,
587e729e 1168 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1169 .ndo_set_rx_mode = ieee80211_set_multicast_list,
47846c9b 1170 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1171 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1172 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1173};
1174
cf0277e7 1175static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1176 struct sk_buff *skb,
a350ecce 1177 struct net_device *sb_dev)
cf0277e7
JB		 1178{
1179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1180 struct ieee80211_local *local = sdata->local;
1181 struct ieee80211_hdr *hdr;
1182 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1183
32c5057b 1184 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1185 return 0;
1186
1187 if (skb->len < 4 ||
b49bb574 1188 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1189 return 0; /* doesn't matter, frame will be dropped */
1190
b49bb574 1191 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1192
00e96dec 1193 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1194}
1195
587e729e
JB		 1196static const struct net_device_ops ieee80211_monitorif_ops = {
1197 .ndo_open = ieee80211_open,
1198 .ndo_stop = ieee80211_stop,
f142c6b9 1199 .ndo_uninit = ieee80211_uninit,
587e729e 1200 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1201 .ndo_set_rx_mode = ieee80211_set_multicast_list,
31eba5bc 1202 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1203 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1204 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1205};
1206
50ff477a
JC		 1207static const struct net_device_ops ieee80211_dataif_8023_ops = {
1208 .ndo_open = ieee80211_open,
1209 .ndo_stop = ieee80211_stop,
1210 .ndo_uninit = ieee80211_uninit,
1211 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1212 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1213 .ndo_set_mac_address = ieee80211_change_mac,
1214 .ndo_select_queue = ieee80211_netdev_select_queue,
1215 .ndo_get_stats64 = ieee80211_get_stats64,
1216};
1217
1218static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata,
1219 bool enable)
1220{
1221 sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops :
1222 &ieee80211_dataif_ops;
1223 sdata->hw_80211_encap = enable;
1224}
1225
1226bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable)
1227{
1228 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1229 struct ieee80211_local *local = sdata->local;
1230 struct ieee80211_sub_if_data *iter;
1231 struct ieee80211_key *key;
1232
1233 mutex_lock(&local->iflist_mtx);
1234 list_for_each_entry(iter, &local->interfaces, list) {
1235 struct ieee80211_sub_if_data *disable = NULL;
1236
1237 if (vif->type == NL80211_IFTYPE_MONITOR) {
1238 disable = iter;
1239 __ieee80211_set_hw_80211_encap(iter, false);
1240 } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) {
1241 disable = sdata;
1242 enable = false;
1243 }
1244 if (disable)
1245 sdata_dbg(disable,
1246 "disable hw 80211 encap due to mon co-exist\n");
1247 }
1248 mutex_unlock(&local->iflist_mtx);
1249
1250 if (enable == sdata->hw_80211_encap)
1251 return enable;
1252
1253 if (!sdata->dev)
1254 return false;
1255
1256 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1257 (local->hw.wiphy->frag_threshold != (u32)-1))
1258 enable = false;
1259
1260 mutex_lock(&sdata->local->key_mtx);
1261 list_for_each_entry(key, &sdata->key_list, list) {
1262 if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
1263 enable = false;
1264 }
1265 mutex_unlock(&sdata->local->key_mtx);
1266
1267 __ieee80211_set_hw_80211_encap(sdata, enable);
1268
1269 return enable;
1270}
1271EXPORT_SYMBOL(ieee80211_set_hw_80211_encap);
1272
5a490510
JB		 1273static void ieee80211_if_free(struct net_device *dev)
1274{
1275 free_percpu(dev->tstats);
5a490510
JB		 1276}
1277
587e729e
JB		 1278static void ieee80211_if_setup(struct net_device *dev)
1279{
1280 ether_setup(dev);
550fd08c 1281 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1282 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1283 dev->needs_free_netdev = true;
1284 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1285}
1286
80a83cfc
MK		 1287static void ieee80211_if_setup_no_queue(struct net_device *dev)
1288{
1289 ieee80211_if_setup(dev);
1290 dev->priv_flags |= IFF_NO_QUEUE;
1291}
1292
1fa57d01
JB		 1293static void ieee80211_iface_work(struct work_struct *work)
1294{
1295 struct ieee80211_sub_if_data *sdata =
1296 container_of(work, struct ieee80211_sub_if_data, work);
1297 struct ieee80211_local *local = sdata->local;
1298 struct sk_buff *skb;
344eec67 1299 struct sta_info *sta;
1fa57d01
JB		 1300
1301 if (!ieee80211_sdata_running(sdata))
1302 return;
1303
fc58c47e 1304 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1305 return;
1306
4afaff17 1307 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1308 return;
1309
1310 /* first process frames */
1311 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1312 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1313
699cb58c
JB		 1314 if (ieee80211_is_action(mgmt->frame_control) &&
1315 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1316 int len = skb->len;
bed7ee6e 1317
a93e3644 1318 mutex_lock(&local->sta_mtx);
875ae5f6 1319 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1320 if (sta) {
1321 switch (mgmt->u.action.u.addba_req.action_code) {
1322 case WLAN_ACTION_ADDBA_REQ:
1323 ieee80211_process_addba_request(
1324 local, sta, mgmt, len);
1325 break;
1326 case WLAN_ACTION_ADDBA_RESP:
1327 ieee80211_process_addba_resp(local, sta,
1328 mgmt, len);
1329 break;
1330 case WLAN_ACTION_DELBA:
1331 ieee80211_process_delba(sdata, sta,
1332 mgmt, len);
1333 break;
1334 default:
1335 WARN_ON(1);
1336 break;
1337 }
1338 }
a93e3644 1339 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1340 } else if (ieee80211_is_action(mgmt->frame_control) &&
1341 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1342 switch (mgmt->u.action.u.vht_group_notif.action_code) {
d2941df8
JB		 1343 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1344 struct ieee80211_rx_status *status;
1345 enum nl80211_band band;
1346 u8 opmode;
1347
1348 status = IEEE80211_SKB_RXCB(skb);
1349 band = status->band;
1350 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1351
1352 mutex_lock(&local->sta_mtx);
1353 sta = sta_info_get_bss(sdata, mgmt->sa);
1354
1355 if (sta)
1356 ieee80211_vht_handle_opmode(sdata, sta,
1357 opmode,
1358 band);
1359
1360 mutex_unlock(&local->sta_mtx);
1361 break;
1362 }
23a1f8d4
SS		 1363 case WLAN_VHT_ACTION_GROUPID_MGMT:
1364 ieee80211_process_mu_groups(sdata, mgmt);
1365 break;
1366 default:
1367 WARN_ON(1);
1368 break;
1369 }
344eec67
JB		 1370 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1371 struct ieee80211_hdr *hdr = (void *)mgmt;
1372 /*
1373 * So the frame isn't mgmt, but frame_control
1374 * is at the right place anyway, of course, so
1375 * the if statement is correct.
1376 *
1377 * Warn if we have other data frame types here,
1378 * they must not get here.
1379 */
1380 WARN_ON(hdr->frame_control &
1381 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1382 WARN_ON(!(hdr->seq_ctrl &
1383 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1384 /*
1385 * This was a fragment of a frame, received while
1386 * a block-ack session was active. That cannot be
1387 * right, so terminate the session.
1388 */
a93e3644 1389 mutex_lock(&local->sta_mtx);
875ae5f6 1390 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67 1391 if (sta) {
a1f2ba04 1392 u16 tid = ieee80211_get_tid(hdr);
344eec67
JB		 1393
1394 __ieee80211_stop_rx_ba_session(
1395 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1396 WLAN_REASON_QSTA_REQUIRE_SETUP,
1397 true);
344eec67 1398 }
a93e3644 1399 mutex_unlock(&local->sta_mtx);
bed7ee6e 1400 } else switch (sdata->vif.type) {
1fa57d01
JB		 1401 case NL80211_IFTYPE_STATION:
1402 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1403 break;
1404 case NL80211_IFTYPE_ADHOC:
1405 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1406 break;
1407 case NL80211_IFTYPE_MESH_POINT:
1408 if (!ieee80211_vif_is_mesh(&sdata->vif))
1409 break;
1410 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1411 break;
1412 default:
1413 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1414 break;
1415 }
36b3a628
JB		 1416
1417 kfree_skb(skb);
1fa57d01
JB		 1418 }
1419
1420 /* then other type-dependent work */
1421 switch (sdata->vif.type) {
1422 case NL80211_IFTYPE_STATION:
1423 ieee80211_sta_work(sdata);
1424 break;
1425 case NL80211_IFTYPE_ADHOC:
1426 ieee80211_ibss_work(sdata);
1427 break;
1428 case NL80211_IFTYPE_MESH_POINT:
1429 if (!ieee80211_vif_is_mesh(&sdata->vif))
1430 break;
1431 ieee80211_mesh_work(sdata);
1432 break;
239281f8
RL		 1433 case NL80211_IFTYPE_OCB:
1434 ieee80211_ocb_work(sdata);
1435 break;
1fa57d01
JB		 1436 default:
1437 break;
1438 }
1439}
1440
04ecd257
JB		 1441static void ieee80211_recalc_smps_work(struct work_struct *work)
1442{
1443 struct ieee80211_sub_if_data *sdata =
1444 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1445
1446 ieee80211_recalc_smps(sdata);
1447}
1fa57d01 1448
75636525
JB		 1449/*
1450 * Helper function to initialise an interface to a specific type.
1451 */
1452static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1453 enum nl80211_iftype type)
f0706e82 1454{
239281f8
RL		 1455 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1456 0xff, 0xff, 0xff};
1457
75636525
JB		 1458 /* clear type-dependent union */
1459 memset(&sdata->u, 0, sizeof(sdata->u));
1460
1461 /* and set some type-dependent values */
1462 sdata->vif.type = type;
2ca27bcf 1463 sdata->vif.p2p = false;
60719ffd 1464 sdata->wdev.iftype = type;
75636525 1465
a621fa4d
JB		 1466 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1467 sdata->control_port_no_encrypt = false;
7f3f96ce
MT		 1468 sdata->control_port_over_nl80211 = false;
1469 sdata->control_port_no_preauth = false;
2475b1cc 1470 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1471 sdata->vif.bss_conf.idle = true;
db6d9e9e 1472 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
a621fa4d 1473
b53be792 1474 sdata->noack_map = 0;
50ff477a 1475 sdata->hw_80211_encap = false;
b53be792 1476
f142c6b9
JB		 1477 /* only monitor/p2p-device differ */
1478 if (sdata->dev) {
1479 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1480 sdata->dev->type = ARPHRD_ETHER;
1481 }
75636525 1482
35f20c14 1483 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1484 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1485 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1486 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1487 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1488 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1489
75636525 1490 switch (type) {
2ca27bcf
JB		 1491 case NL80211_IFTYPE_P2P_GO:
1492 type = NL80211_IFTYPE_AP;
1493 sdata->vif.type = type;
1494 sdata->vif.p2p = true;
1495 /* fall through */
05c914fe 1496 case NL80211_IFTYPE_AP:
d012a605 1497 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1498 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1499 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1500 break;
2ca27bcf
JB		 1501 case NL80211_IFTYPE_P2P_CLIENT:
1502 type = NL80211_IFTYPE_STATION;
1503 sdata->vif.type = type;
1504 sdata->vif.p2p = true;
1505 /* fall through */
05c914fe 1506 case NL80211_IFTYPE_STATION:
ad2d223a 1507 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1508 ieee80211_sta_setup_sdata(sdata);
472dbc45 1509 break;
6e0bd6c3 1510 case NL80211_IFTYPE_OCB:
239281f8
RL		 1511 sdata->vif.bss_conf.bssid = bssid_wildcard;
1512 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1513 break;
46900298 1514 case NL80211_IFTYPE_ADHOC:
ad2d223a 1515 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1516 ieee80211_ibss_setup_sdata(sdata);
1517 break;
05c914fe 1518 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1519 if (ieee80211_vif_is_mesh(&sdata->vif))
1520 ieee80211_mesh_init_sdata(sdata);
1521 break;
05c914fe 1522 case NL80211_IFTYPE_MONITOR:
75636525 1523 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1524 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1525 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1526 MONITOR_FLAG_OTHER_BSS;
1527 break;
05c914fe 1528 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1529 sdata->vif.bss_conf.bssid = NULL;
1530 break;
167e33f4
AB		 1531 case NL80211_IFTYPE_NAN:
1532 idr_init(&sdata->u.nan.function_inst_ids);
1533 spin_lock_init(&sdata->u.nan.func_lock);
1534 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1535 break;
05c914fe 1536 case NL80211_IFTYPE_AP_VLAN:
98104fde 1537 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1538 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1539 break;
05c914fe 1540 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1541 case NUM_NL80211_IFTYPES:
c7976f52 1542 WARN_ON(1);
75636525
JB		 1543 break;
1544 }
1545
1546 ieee80211_debugfs_add_netdev(sdata);
1547}
1548
34d4bc4d
JB		 1549static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1550 enum nl80211_iftype type)
1551{
1552 struct ieee80211_local *local = sdata->local;
1553 int ret, err;
2ca27bcf
JB		 1554 enum nl80211_iftype internal_type = type;
1555 bool p2p = false;
34d4bc4d
JB		 1556
1557 ASSERT_RTNL();
1558
1559 if (!local->ops->change_interface)
1560 return -EBUSY;
1561
1562 switch (sdata->vif.type) {
1563 case NL80211_IFTYPE_AP:
1564 case NL80211_IFTYPE_STATION:
1565 case NL80211_IFTYPE_ADHOC:
239281f8 1566 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1567 /*
1568 * Could maybe also all others here?
1569 * Just not sure how that interacts
1570 * with the RX/config path e.g. for
1571 * mesh.
1572 */
1573 break;
1574 default:
1575 return -EBUSY;
1576 }
1577
1578 switch (type) {
1579 case NL80211_IFTYPE_AP:
1580 case NL80211_IFTYPE_STATION:
1581 case NL80211_IFTYPE_ADHOC:
239281f8 1582 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1583 /*
1584 * Could probably support everything
1585 * but WDS here (WDS do_open can fail
1586 * under memory pressure, which this
1587 * code isn't prepared to handle).
1588 */
1589 break;
2ca27bcf
JB		 1590 case NL80211_IFTYPE_P2P_CLIENT:
1591 p2p = true;
1592 internal_type = NL80211_IFTYPE_STATION;
1593 break;
1594 case NL80211_IFTYPE_P2P_GO:
1595 p2p = true;
1596 internal_type = NL80211_IFTYPE_AP;
1597 break;
34d4bc4d
JB		 1598 default:
1599 return -EBUSY;
1600 }
1601
2ca27bcf 1602 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1603 if (ret)
1604 return ret;
1605
1606 ieee80211_do_stop(sdata, false);
1607
f142c6b9 1608 ieee80211_teardown_sdata(sdata);
34d4bc4d 1609
2ca27bcf 1610 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1611 if (ret)
a9865538 1612 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1613
3a25a8c8
JB		 1614 /*
1615 * Ignore return value here, there's not much we can do since
1616 * the driver changed the interface type internally already.
1617 * The warnings will hopefully make driver authors fix it :-)
1618 */
a9865538 1619 ieee80211_check_queues(sdata, type);
3a25a8c8 1620
34d4bc4d
JB		 1621 ieee80211_setup_sdata(sdata, type);
1622
f142c6b9 1623 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1624 WARN(err, "type change: do_open returned %d", err);
1625
1626 return ret;
1627}
1628
f3947e2d 1629int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1630 enum nl80211_iftype type)
75636525 1631{
34d4bc4d
JB		 1632 int ret;
1633
f3947e2d
JB		 1634 ASSERT_RTNL();
1635
2ca27bcf 1636 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1637 return 0;
1638
34d4bc4d
JB		 1639 if (ieee80211_sdata_running(sdata)) {
1640 ret = ieee80211_runtime_change_iftype(sdata, type);
1641 if (ret)
1642 return ret;
1643 } else {
1644 /* Purge and reset type-dependent state. */
f142c6b9 1645 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1646 ieee80211_setup_sdata(sdata, type);
1647 }
75636525
JB		 1648
1649 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1650 if (type == NL80211_IFTYPE_STATION)
1651 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1652
1653 return 0;
f0706e82
JB		 1654}
1655
fa9029f8 1656static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1657 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1658{
1659 struct ieee80211_sub_if_data *sdata;
1660 u64 mask, start, addr, val, inc;
1661 u8 *m;
1662 u8 tmp_addr[ETH_ALEN];
1663 int i;
1664
1665 /* default ... something at least */
f142c6b9 1666 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1667
1668 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1669 local->hw.wiphy->n_addresses <= 1)
1670 return;
1671
fa9029f8
JB		 1672 mutex_lock(&local->iflist_mtx);
1673
1674 switch (type) {
1675 case NL80211_IFTYPE_MONITOR:
1676 /* doesn't matter */
1677 break;
1678 case NL80211_IFTYPE_WDS:
1679 case NL80211_IFTYPE_AP_VLAN:
1680 /* match up with an AP interface */
1681 list_for_each_entry(sdata, &local->interfaces, list) {
1682 if (sdata->vif.type != NL80211_IFTYPE_AP)
1683 continue;
f142c6b9 1684 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1685 break;
1686 }
1687 /* keep default if no AP interface present */
1688 break;
6d71117a
JB		 1689 case NL80211_IFTYPE_P2P_CLIENT:
1690 case NL80211_IFTYPE_P2P_GO:
30686bf7 1691 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1692 list_for_each_entry(sdata, &local->interfaces, list) {
1693 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1694 continue;
1695 if (!ieee80211_sdata_running(sdata))
1696 continue;
1697 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1698 goto out_unlock;
1699 }
1700 }
02049ce2 1701 /* fall through */
fa9029f8
JB		 1702 default:
1703 /* assign a new address if possible -- try n_addresses first */
1704 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1705 bool used = false;
1706
1707 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1708 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1709 sdata->vif.addr)) {
fa9029f8
JB		 1710 used = true;
1711 break;
1712 }
1713 }
1714
1715 if (!used) {
f142c6b9 1716 memcpy(perm_addr,
fa9029f8
JB		 1717 local->hw.wiphy->addresses[i].addr,
1718 ETH_ALEN);
1719 break;
1720 }
1721 }
1722
1723 /* try mask if available */
1724 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1725 break;
1726
1727 m = local->hw.wiphy->addr_mask;
1728 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1729 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1730 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1731
1732 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1733 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1734 pr_info("not contiguous\n");
fa9029f8
JB		 1735 break;
1736 }
1737
ac20976d
HS		 1738 /*
1739 * Pick address of existing interface in case user changed
1740 * MAC address manually, default to perm_addr.
1741 */
fa9029f8 1742 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1743 list_for_each_entry(sdata, &local->interfaces, list) {
1744 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1745 continue;
1746 m = sdata->vif.addr;
1747 break;
1748 }
fa9029f8
JB		 1749 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1750 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1751 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1752
1753 inc = 1ULL<<__ffs64(mask);
1754 val = (start & mask);
1755 addr = (start & ~mask) | (val & mask);
1756 do {
1757 bool used = false;
1758
1759 tmp_addr[5] = addr >> 0*8;
1760 tmp_addr[4] = addr >> 1*8;
1761 tmp_addr[3] = addr >> 2*8;
1762 tmp_addr[2] = addr >> 3*8;
1763 tmp_addr[1] = addr >> 4*8;
1764 tmp_addr[0] = addr >> 5*8;
1765
1766 val += inc;
1767
1768 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1769 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1770 used = true;
1771 break;
1772 }
1773 }
1774
1775 if (!used) {
f142c6b9 1776 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1777 break;
1778 }
1779 addr = (start & ~mask) | (val & mask);
1780 } while (addr != start);
1781
1782 break;
1783 }
1784
6d71117a 1785 out_unlock:
fa9029f8
JB		 1786 mutex_unlock(&local->iflist_mtx);
1787}
1788
3e122be0 1789int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1790 unsigned char name_assign_type,
84efbb84 1791 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1792 struct vif_params *params)
f0706e82 1793{
f142c6b9 1794 struct net_device *ndev = NULL;
f0706e82 1795 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1796 struct txq_info *txqi;
80a83cfc 1797 void (*if_setup)(struct net_device *dev);
75636525 1798 int ret, i;
ded81f6b 1799 int txqs = 1;
f0706e82
JB		 1800
1801 ASSERT_RTNL();
75636525 1802
708d50ed 1803 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1804 struct wireless_dev *wdev;
1805
1806 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1807 GFP_KERNEL);
1808 if (!sdata)
1809 return -ENOMEM;
1810 wdev = &sdata->wdev;
1811
1812 sdata->dev = NULL;
1813 strlcpy(sdata->name, name, IFNAMSIZ);
1814 ieee80211_assign_perm_addr(local, wdev->address, type);
1815 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1816 } else {
ba8c3d6f
FF		 1817 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1818 sizeof(void *));
1819 int txq_size = 0;
1820
79af1f86
JB		 1821 if (local->ops->wake_tx_queue &&
1822 type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 1823 (type != NL80211_IFTYPE_MONITOR ||
1824 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 1825 txq_size += sizeof(struct txq_info) +
1826 local->hw.txq_data_size;
1827
dbd50a85 1828 if (local->ops->wake_tx_queue) {
80a83cfc 1829 if_setup = ieee80211_if_setup_no_queue;
dbd50a85 1830 } else {
80a83cfc 1831 if_setup = ieee80211_if_setup;
dbd50a85
JB		 1832 if (local->hw.queues >= IEEE80211_NUM_ACS)
1833 txqs = IEEE80211_NUM_ACS;
1834 }
f142c6b9 1835
ba8c3d6f 1836 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1837 name, name_assign_type,
80a83cfc 1838 if_setup, txqs, 1);
f142c6b9
JB		 1839 if (!ndev)
1840 return -ENOMEM;
1f6e0baa
JC		 1841
1842 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1843 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1844
f142c6b9
JB		 1845 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1846
5a490510
JB		 1847 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1848 if (!ndev->tstats) {
1849 free_netdev(ndev);
1850 return -ENOMEM;
1851 }
1852
f142c6b9
JB		 1853 ndev->needed_headroom = local->tx_headroom +
1854 4*6 /* four MAC addresses */
1855 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1856 + 6 /* mesh */
1857 + 8 /* rfc1042/bridge tunnel */
1858 - ETH_HLEN /* ethernet hard_header_len */
1859 + IEEE80211_ENCRYPT_HEADROOM;
1860 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1861
1862 ret = dev_alloc_name(ndev, ndev->name);
1863 if (ret < 0) {
e6436be2 1864 ieee80211_if_free(ndev);
c7a61cba 1865 free_netdev(ndev);
f142c6b9
JB		 1866 return ret;
1867 }
1868
1869 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 1870 if (is_valid_ether_addr(params->macaddr))
b5dfae02
BG		 1871 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1872 else
1873 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1874 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1875
1876 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1877 sdata = netdev_priv(ndev);
1878 ndev->ieee80211_ptr = &sdata->wdev;
1879 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1880 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1881
ba8c3d6f
FF		 1882 if (txq_size) {
1883 txqi = netdev_priv(ndev) + size;
fa962b92 1884 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1885 }
1886
f142c6b9
JB		 1887 sdata->dev = ndev;
1888 }
75636525
JB		 1889
1890 /* initialise type-independent data */
f0706e82 1891 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1892 sdata->local = local;
75636525
JB		 1893
1894 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1895 skb_queue_head_init(&sdata->fragments[i].skb_list);
1896
1897 INIT_LIST_HEAD(&sdata->key_list);
1898
164eb02d
SW		 1899 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1900 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1901 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1902 ieee80211_delayed_tailroom_dec);
97f97b1f 1903
57fbcce3 1904 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1905 struct ieee80211_supported_band *sband;
1906 sband = local->hw.wiphy->bands[i];
1907 sdata->rc_rateidx_mask[i] =
1908 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1909 if (sband) {
1910 __le16 cap;
1911 u16 *vht_rate_mask;
1912
19468413
SW		 1913 memcpy(sdata->rc_rateidx_mcs_mask[i],
1914 sband->ht_cap.mcs.rx_mask,
1915 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1916
1917 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1918 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1919 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1920 } else {
19468413
SW		 1921 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1922 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1923 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1924 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1925 }
37eb0b16 1926 }
75636525 1927
3a25a8c8
JB		 1928 ieee80211_set_default_queues(sdata);
1929
1ea6f9c0
JB		 1930 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1931 sdata->user_power_level = local->user_power_level;
1932
2475b1cc
MS		 1933 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1934
75636525
JB		 1935 /* setup type-dependent data */
1936 ieee80211_setup_sdata(sdata, type);
f0706e82 1937
f142c6b9 1938 if (ndev) {
dd665d23
JB		 1939 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1940 if (type == NL80211_IFTYPE_STATION)
1941 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 1942
f142c6b9 1943 ndev->features |= local->hw.netdev_features;
07b83d2e
JB		 1944 ndev->hw_features |= ndev->features &
1945 MAC80211_SUPPORTED_FEATURES_TX;
72d78728 1946
b7ffbd7e
JB		 1947 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1948
9c22b4a3
JW		 1949 /* MTU range: 256 - 2304 */
1950 ndev->min_mtu = 256;
06354665 1951 ndev->max_mtu = local->hw.max_mtu;
9c22b4a3 1952
f142c6b9
JB		 1953 ret = register_netdevice(ndev);
1954 if (ret) {
cf124db5 1955 free_netdev(ndev);
f142c6b9
JB		 1956 return ret;
1957 }
1958 }
f0706e82 1959
c771c9d8 1960 mutex_lock(&local->iflist_mtx);
79010420 1961 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1962 mutex_unlock(&local->iflist_mtx);
79010420 1963
84efbb84
JB		 1964 if (new_wdev)
1965 *new_wdev = &sdata->wdev;
f0706e82 1966
f0706e82 1967 return 0;
f0706e82
JB		 1968}
1969
f698d856 1970void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1971{
f0706e82 1972 ASSERT_RTNL();
11a843b7 1973
c771c9d8 1974 mutex_lock(&sdata->local->iflist_mtx);
75636525 1975 list_del_rcu(&sdata->list);
c771c9d8
JB		 1976 mutex_unlock(&sdata->local->iflist_mtx);
1977
f1267cf3
BP		 1978 if (sdata->vif.txq)
1979 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1980
75636525 1981 synchronize_rcu();
f142c6b9
JB		 1982
1983 if (sdata->dev) {
1984 unregister_netdevice(sdata->dev);
1985 } else {
1986 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1987 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1988 kfree(sdata);
1989 }
1990}
1991
1992void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1993{
1994 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1995 return;
1996 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1997}
1998
75636525 1999void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 2000{
75636525 2001 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 2002 LIST_HEAD(unreg_list);
f142c6b9 2003 LIST_HEAD(wdev_list);
f0706e82
JB		 2004
2005 ASSERT_RTNL();
2006
d8d9008c
JB		 2007 /* Before destroying the interfaces, make sure they're all stopped so
2008 * that the hardware is stopped. Otherwise, the driver might still be
2009 * iterating the interfaces during the shutdown, e.g. from a worker
2010 * or from RX processing or similar, and if it does so (using atomic
2011 * iteration) while we're manipulating the list, the iteration will
2012 * crash.
2013 *
2014 * After this, the hardware should be stopped and the driver should
2015 * have stopped all of its activities, so that we can do RCU-unaware
2016 * manipulations of the interface list below.
c8aa22db 2017 */
d8d9008c
JB		 2018 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2019
2020 WARN(local->open_count, "%s: open count remains %d\n",
2021 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 2022
a50e5fb8
SS		 2023 ieee80211_txq_teardown_flows(local);
2024
efe117ab 2025 mutex_lock(&local->iflist_mtx);
75636525
JB		 2026 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2027 list_del(&sdata->list);
c771c9d8 2028
f142c6b9
JB		 2029 if (sdata->dev)
2030 unregister_netdevice_queue(sdata->dev, &unreg_list);
2031 else
2032 list_add(&sdata->list, &wdev_list);
f0706e82 2033 }
efe117ab
ED		 2034 mutex_unlock(&local->iflist_mtx);
2035 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 2036
2037 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2038 list_del(&sdata->list);
2039 cfg80211_unregister_wdev(&sdata->wdev);
2040 kfree(sdata);
2041 }
f0706e82 2042}
5cff20e6 2043
47846c9b 2044static int netdev_notify(struct notifier_block *nb,
351638e7 2045 unsigned long state, void *ptr)
47846c9b 2046{
351638e7 2047 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 2048 struct ieee80211_sub_if_data *sdata;
2049
2050 if (state != NETDEV_CHANGENAME)
8bd811aa 2051 return NOTIFY_DONE;
47846c9b
JB		 2052
2053 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 2054 return NOTIFY_DONE;
47846c9b
JB		 2055
2056 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 2057 return NOTIFY_DONE;
47846c9b
JB		 2058
2059 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 2060 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 2061 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 2062
2063 return NOTIFY_OK;
47846c9b
JB		 2064}
2065
2066static struct notifier_block mac80211_netdev_notifier = {
2067 .notifier_call = netdev_notify,
2068};
2069
2070int ieee80211_iface_init(void)
2071{
2072 return register_netdevice_notifier(&mac80211_netdev_notifier);
2073}
2074
2075void ieee80211_iface_exit(void)
2076{
2077 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2078}
72f15d53
MB		 2079
2080void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2081{
2082 if (sdata->vif.type == NL80211_IFTYPE_AP)
2083 atomic_inc(&sdata->u.ap.num_mcast_sta);
2084 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2085 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2086}
2087
2088void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2089{
2090 if (sdata->vif.type == NL80211_IFTYPE_AP)
2091 atomic_dec(&sdata->u.ap.num_mcast_sta);
2092 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2093 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2094}
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