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mac80211: implement nan_change_conf
[mirror_ubuntu-hirsute-kernel.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
5a0e3ad6 14#include <linux/slab.h>
f0706e82
JB		 15#include <linux/kernel.h>
16#include <linux/if_arp.h>
17#include <linux/netdevice.h>
18#include <linux/rtnetlink.h>
19#include <net/mac80211.h>
cf0277e7 20#include <net/ieee80211_radiotap.h>
f0706e82
JB		 21#include "ieee80211_i.h"
22#include "sta_info.h"
e9f207f0 23#include "debugfs_netdev.h"
ee385855 24#include "mesh.h"
0d143fe1 25#include "led.h"
24487981 26#include "driver-ops.h"
cf0277e7 27#include "wme.h"
1be7fe8d 28#include "rate.h"
0d143fe1 29
c771c9d8
JB		 30/**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
38 * the iflist_mtx.
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
41 *
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
44 */
45
42bd20d9
AE		 46static void ieee80211_iface_work(struct work_struct *work);
47
1ea6f9c0
JB		 48bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
49{
50 struct ieee80211_chanctx_conf *chanctx_conf;
51 int power;
52
53 rcu_read_lock();
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
55 if (!chanctx_conf) {
56 rcu_read_unlock();
57 return false;
58 }
59
0430c883 60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 61 rcu_read_unlock();
62
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
65
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
68
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
72 return true;
73 }
74
75 return false;
76}
77
db82d8a9
LB		 78void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
79 bool update_bss)
1ea6f9c0 80{
5ad11b50
EG		 81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
84}
c771c9d8 85
62a40a15 86static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 87{
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
89 return 0;
90
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
93}
94
62a40a15 95static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 96{
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
98 return 0;
99
3b24f4c6 100 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 101
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
104}
105
62a40a15
JB		 106static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
107 bool force_active)
cc45ae54 108{
1d5e1266 109 bool working, scanning, active;
cc45ae54 110 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 111
cc45ae54
JB		 112 lockdep_assert_held(&local->mtx);
113
62a40a15
JB		 114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
116 local->monitors;
cc45ae54 117
1d5e1266
JB		 118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
cc45ae54 120
f1e3e051
JB		 121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 123
cc45ae54
JB		 124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128
fd0f979a 129 if (active)
cc45ae54
JB		 130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 else
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135
fd0f979a 136 if (working || scanning || active)
62a40a15
JB		 137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
139}
140
141u32 ieee80211_idle_off(struct ieee80211_local *local)
142{
143 return __ieee80211_recalc_idle(local, true);
144}
145
146void ieee80211_recalc_idle(struct ieee80211_local *local)
147{
148 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 149 if (change)
150 ieee80211_hw_config(local, change);
cc45ae54
JB		 151}
152
0d143fe1
JB		 153static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
154{
09b1426e 155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 156 return -EINVAL;
0d143fe1 157
0d143fe1
JB		 158 dev->mtu = new_mtu;
159 return 0;
160}
161
3899ba90 162static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 163 bool check_dup)
478622e8 164{
ac20976d
HS		 165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_sub_if_data *iter;
478622e8
HS		 167 u64 new, mask, tmp;
168 u8 *m;
169 int ret = 0;
170
171 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
172 return 0;
173
174 m = addr;
175 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178
179 m = local->hw.wiphy->addr_mask;
180 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
181 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
182 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
183
31eba5bc
FF		 184 if (!check_dup)
185 return ret;
478622e8
HS		 186
187 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
478622e8
HS		 190 continue;
191
3899ba90 192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 193 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 194 continue;
195
ac20976d 196 m = iter->vif.addr;
478622e8
HS		 197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206 mutex_unlock(&local->iflist_mtx);
207
208 return ret;
209}
210
47846c9b
JB		 211static int ieee80211_change_mac(struct net_device *dev, void *addr)
212{
213 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 214 struct sockaddr *sa = addr;
31eba5bc 215 bool check_dup = true;
47846c9b
JB		 216 int ret;
217
9607e6b6 218 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 219 return -EBUSY;
220
31eba5bc 221 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 222 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 223 check_dup = false;
224
3899ba90 225 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 226 if (ret)
227 return ret;
228
fc5f7577 229 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 230
231 if (ret == 0)
fc5f7577 232 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 233
234 return ret;
235}
236
0d143fe1
JB		 237static inline int identical_mac_addr_allowed(int type1, int type2)
238{
239 return type1 == NL80211_IFTYPE_MONITOR ||
240 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 241 type1 == NL80211_IFTYPE_P2P_DEVICE ||
242 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
244 (type1 == NL80211_IFTYPE_WDS &&
245 (type2 == NL80211_IFTYPE_WDS ||
246 type2 == NL80211_IFTYPE_AP)) ||
247 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
248 (type1 == NL80211_IFTYPE_AP_VLAN &&
249 (type2 == NL80211_IFTYPE_AP ||
250 type2 == NL80211_IFTYPE_AP_VLAN));
251}
252
87490f6d
JB		 253static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
254 enum nl80211_iftype iftype)
0d143fe1 255{
b4a4bf5d 256 struct ieee80211_local *local = sdata->local;
87490f6d 257 struct ieee80211_sub_if_data *nsdata;
b6a55015 258 int ret;
0d143fe1 259
87490f6d 260 ASSERT_RTNL();
0d143fe1
JB		 261
262 /* we hold the RTNL here so can safely walk the list */
263 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 264 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 265 /*
266 * Only OCB and monitor mode may coexist
267 */
268 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
269 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
270 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
271 nsdata->vif.type == NL80211_IFTYPE_OCB))
272 return -EBUSY;
273
0d143fe1
JB		 274 /*
275 * Allow only a single IBSS interface to be up at any
276 * time. This is restricted because beacon distribution
277 * cannot work properly if both are in the same IBSS.
278 *
279 * To remove this restriction we'd have to disallow them
280 * from setting the same SSID on different IBSS interfaces
281 * belonging to the same hardware. Then, however, we're
282 * faced with having to adopt two different TSF timers...
283 */
87490f6d 284 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 285 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
286 return -EBUSY;
73da7d5b
SW		 287 /*
288 * will not add another interface while any channel
289 * switch is active.
290 */
291 if (nsdata->vif.csa_active)
292 return -EBUSY;
0d143fe1
JB		 293
294 /*
295 * The remaining checks are only performed for interfaces
296 * with the same MAC address.
297 */
371a255e
JB		 298 if (!ether_addr_equal(sdata->vif.addr,
299 nsdata->vif.addr))
0d143fe1
JB		 300 continue;
301
302 /*
303 * check whether it may have the same address
304 */
87490f6d 305 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 306 nsdata->vif.type))
307 return -ENOTUNIQ;
308
309 /*
310 * can only add VLANs to enabled APs
311 */
87490f6d 312 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 313 nsdata->vif.type == NL80211_IFTYPE_AP)
314 sdata->bss = &nsdata->u.ap;
315 }
316 }
317
b6a55015
LC		 318 mutex_lock(&local->chanctx_mtx);
319 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
320 mutex_unlock(&local->chanctx_mtx);
321 return ret;
87490f6d
JB		 322}
323
a9865538
JB		 324static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
325 enum nl80211_iftype iftype)
3a25a8c8
JB		 326{
327 int n_queues = sdata->local->hw.queues;
328 int i;
329
708d50ed
AB		 330 if (iftype == NL80211_IFTYPE_NAN)
331 return 0;
332
a9865538 333 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 334 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
335 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
336 IEEE80211_INVAL_HW_QUEUE))
337 return -EINVAL;
338 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
339 n_queues))
340 return -EINVAL;
341 }
3a25a8c8
JB		 342 }
343
a9865538
JB		 344 if ((iftype != NL80211_IFTYPE_AP &&
345 iftype != NL80211_IFTYPE_P2P_GO &&
346 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 347 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 348 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
349 return 0;
350 }
351
352 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
353 return -EINVAL;
354
355 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
356 return -EINVAL;
357
358 return 0;
359}
360
85416a4f
CL		 361void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
362 const int offset)
363{
364 struct ieee80211_local *local = sdata->local;
d8212184 365 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 366
367#define ADJUST(_f, _s) do { \
368 if (flags & MONITOR_FLAG_##_f) \
369 local->fif_##_s += offset; \
370 } while (0)
371
372 ADJUST(FCSFAIL, fcsfail);
373 ADJUST(PLCPFAIL, plcpfail);
374 ADJUST(CONTROL, control);
375 ADJUST(CONTROL, pspoll);
376 ADJUST(OTHER_BSS, other_bss);
377
378#undef ADJUST
379}
380
3a25a8c8
JB		 381static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
382{
383 struct ieee80211_local *local = sdata->local;
384 int i;
385
386 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 387 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 388 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 389 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 390 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 391 else
392 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 393 }
394 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
395}
396
3c3e21e7 397int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 398{
399 struct ieee80211_sub_if_data *sdata;
8b305780 400 int ret;
4b6f1dd6 401
30686bf7 402 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 403 return 0;
404
8b305780 405 ASSERT_RTNL();
685fb72b 406
4b6f1dd6 407 if (local->monitor_sdata)
8b305780 408 return 0;
4b6f1dd6
JB		 409
410 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 411 if (!sdata)
412 return -ENOMEM;
4b6f1dd6
JB		 413
414 /* set up data */
415 sdata->local = local;
416 sdata->vif.type = NL80211_IFTYPE_MONITOR;
417 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
418 wiphy_name(local->hw.wiphy));
34171dc0 419 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 420
2475b1cc
MS		 421 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
422
3a25a8c8
JB		 423 ieee80211_set_default_queues(sdata);
424
4b6f1dd6
JB		 425 ret = drv_add_interface(local, sdata);
426 if (WARN_ON(ret)) {
427 /* ok .. stupid driver, it asked for this! */
428 kfree(sdata);
8b305780 429 return ret;
4b6f1dd6
JB		 430 }
431
a9865538 432 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 433 if (ret) {
434 kfree(sdata);
8b305780 435 return ret;
3a25a8c8
JB		 436 }
437
fab57a6c
JB		 438 mutex_lock(&local->iflist_mtx);
439 rcu_assign_pointer(local->monitor_sdata, sdata);
440 mutex_unlock(&local->iflist_mtx);
441
34a3740d 442 mutex_lock(&local->mtx);
4bf88530 443 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 444 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 445 mutex_unlock(&local->mtx);
55de908a 446 if (ret) {
fab57a6c 447 mutex_lock(&local->iflist_mtx);
0c2bef46 448 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 449 mutex_unlock(&local->iflist_mtx);
450 synchronize_net();
55de908a
JB		 451 drv_remove_interface(local, sdata);
452 kfree(sdata);
8b305780 453 return ret;
55de908a
JB		 454 }
455
42bd20d9
AE		 456 skb_queue_head_init(&sdata->skb_queue);
457 INIT_WORK(&sdata->work, ieee80211_iface_work);
458
8b305780 459 return 0;
4b6f1dd6
JB		 460}
461
3c3e21e7 462void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 463{
464 struct ieee80211_sub_if_data *sdata;
465
30686bf7 466 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 467 return;
468
8b305780
JB		 469 ASSERT_RTNL();
470
685fb72b 471 mutex_lock(&local->iflist_mtx);
4b6f1dd6 472
685fb72b
JB		 473 sdata = rcu_dereference_protected(local->monitor_sdata,
474 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 475 if (!sdata) {
476 mutex_unlock(&local->iflist_mtx);
477 return;
478 }
4b6f1dd6 479
0c2bef46 480 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 481 mutex_unlock(&local->iflist_mtx);
482
4b6f1dd6
JB		 483 synchronize_net();
484
34a3740d 485 mutex_lock(&local->mtx);
55de908a 486 ieee80211_vif_release_channel(sdata);
34a3740d 487 mutex_unlock(&local->mtx);
55de908a 488
4b6f1dd6
JB		 489 drv_remove_interface(local, sdata);
490
491 kfree(sdata);
492}
493
34d4bc4d
JB		 494/*
495 * NOTE: Be very careful when changing this function, it must NOT return
496 * an error on interface type changes that have been pre-checked, so most
497 * checks should be in ieee80211_check_concurrent_iface.
498 */
f142c6b9 499int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 500{
f142c6b9
JB		 501 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
502 struct net_device *dev = wdev->netdev;
87490f6d
JB		 503 struct ieee80211_local *local = sdata->local;
504 struct sta_info *sta;
505 u32 changed = 0;
506 int res;
507 u32 hw_reconf_flags = 0;
508
0d143fe1
JB		 509 switch (sdata->vif.type) {
510 case NL80211_IFTYPE_WDS:
511 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
512 return -ENOLINK;
513 break;
665c93a9
JB		 514 case NL80211_IFTYPE_AP_VLAN: {
515 struct ieee80211_sub_if_data *master;
516
0d143fe1
JB		 517 if (!sdata->bss)
518 return -ENOLINK;
665c93a9 519
4e141dad 520 mutex_lock(&local->mtx);
0d143fe1 521 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 522 mutex_unlock(&local->mtx);
665c93a9
JB		 523
524 master = container_of(sdata->bss,
525 struct ieee80211_sub_if_data, u.ap);
526 sdata->control_port_protocol =
527 master->control_port_protocol;
528 sdata->control_port_no_encrypt =
529 master->control_port_no_encrypt;
1351c5d3
JB		 530 sdata->vif.cab_queue = master->vif.cab_queue;
531 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
532 sizeof(sdata->vif.hw_queue));
2967e031 533 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 534
535 mutex_lock(&local->key_mtx);
536 sdata->crypto_tx_tailroom_needed_cnt +=
537 master->crypto_tx_tailroom_needed_cnt;
538 mutex_unlock(&local->key_mtx);
539
0d143fe1 540 break;
665c93a9 541 }
0d143fe1
JB		 542 case NL80211_IFTYPE_AP:
543 sdata->bss = &sdata->u.ap;
544 break;
545 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 546 case NL80211_IFTYPE_STATION:
547 case NL80211_IFTYPE_MONITOR:
548 case NL80211_IFTYPE_ADHOC:
f142c6b9 549 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 550 case NL80211_IFTYPE_OCB:
cb3b7d87 551 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 552 /* no special treatment */
553 break;
554 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 555 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 556 case NL80211_IFTYPE_P2P_CLIENT:
557 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 558 /* cannot happen */
559 WARN_ON(1);
560 break;
561 }
562
563 if (local->open_count == 0) {
24487981 564 res = drv_start(local);
0d143fe1
JB		 565 if (res)
566 goto err_del_bss;
e8975581
JB		 567 /* we're brought up, everything changes */
568 hw_reconf_flags = ~0;
1f87f7d3 569 ieee80211_led_radio(local, true);
67408c8c
JB		 570 ieee80211_mod_tpt_led_trig(local,
571 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 572 }
573
574 /*
bf533e0b
JB		 575 * Copy the hopefully now-present MAC address to
576 * this interface, if it has the special null one.
0d143fe1 577 */
f142c6b9 578 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 579 memcpy(dev->dev_addr,
580 local->hw.wiphy->perm_addr,
581 ETH_ALEN);
582 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
583
584 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 585 res = -EADDRNOTAVAIL;
586 goto err_stop;
0adc23f5 587 }
0d143fe1
JB		 588 }
589
0d143fe1
JB		 590 switch (sdata->vif.type) {
591 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 592 /* no need to tell driver, but set carrier and chanctx */
593 if (rtnl_dereference(sdata->bss->beacon)) {
594 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 595 netif_carrier_on(dev);
4d76d21b 596 } else {
3edaf3e6 597 netif_carrier_off(dev);
4d76d21b 598 }
0d143fe1
JB		 599 break;
600 case NL80211_IFTYPE_MONITOR:
d8212184 601 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 602 local->cooked_mntrs++;
603 break;
604 }
605
d8212184 606 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 607 res = drv_add_interface(local, sdata);
608 if (res)
609 goto err_stop;
610 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 611 res = ieee80211_add_virtual_monitor(local);
612 if (res)
613 goto err_stop;
614 }
615
0d143fe1
JB		 616 /* must be before the call to ieee80211_configure_filter */
617 local->monitors++;
e8975581 618 if (local->monitors == 1) {
0869aea0
JB		 619 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
620 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 621 }
0d143fe1 622
85416a4f 623 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 624 ieee80211_configure_filter(local);
801d929c
FF		 625 mutex_lock(&local->mtx);
626 ieee80211_recalc_idle(local);
627 mutex_unlock(&local->mtx);
53e9b1de
DG		 628
629 netif_carrier_on(dev);
0d143fe1 630 break;
0d143fe1 631 default:
34d4bc4d 632 if (coming_up) {
075e0847
JB		 633 ieee80211_del_virtual_monitor(local);
634
7b7eab6f 635 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 636 if (res)
637 goto err_stop;
a9865538
JB		 638 res = ieee80211_check_queues(sdata,
639 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 640 if (res)
641 goto err_del_interface;
34d4bc4d 642 }
0d143fe1 643
29cbe68c 644 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 645 local->fif_pspoll++;
7be5086d 646 local->fif_probe_req++;
e3b90ca2 647
e3b90ca2 648 ieee80211_configure_filter(local);
7be5086d
JB		 649 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
650 local->fif_probe_req++;
a3c9aa51 651 }
e3b90ca2 652
708d50ed
AB		 653 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
654 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 655 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 656 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 657
c405c629
JB		 658 switch (sdata->vif.type) {
659 case NL80211_IFTYPE_STATION:
660 case NL80211_IFTYPE_ADHOC:
661 case NL80211_IFTYPE_AP:
662 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 663 case NL80211_IFTYPE_OCB:
0d143fe1 664 netif_carrier_off(dev);
c405c629 665 break;
1411af15 666 case NL80211_IFTYPE_WDS:
f142c6b9 667 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 668 case NL80211_IFTYPE_NAN:
1411af15 669 break;
c405c629 670 default:
a2310824
JB		 671 /* not reached */
672 WARN_ON(1);
c405c629 673 }
59034591
EP		 674
675 /*
cec66283 676 * Set default queue parameters so drivers don't
59034591 677 * need to initialise the hardware if the hardware
cec66283
JB		 678 * doesn't start up with sane defaults.
679 * Enable QoS for anything but station interfaces.
59034591 680 */
cec66283
JB		 681 ieee80211_set_wmm_default(sdata, true,
682 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 683 }
684
2d2080c3
JB		 685 set_bit(SDATA_STATE_RUNNING, &sdata->state);
686
0d143fe1
JB		 687 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
688 /* Create STA entry for the WDS peer */
689 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
690 GFP_KERNEL);
691 if (!sta) {
692 res = -ENOMEM;
693 goto err_del_interface;
694 }
695
83d5cc01
JB		 696 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
697 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
698 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 699
700 res = sta_info_insert(sta);
701 if (res) {
702 /* STA has been freed */
703 goto err_del_interface;
704 }
1be7fe8d
BJ		 705
706 rate_control_rate_init(sta);
1411af15 707 netif_carrier_on(dev);
f142c6b9
JB		 708 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
709 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 710 }
711
0d143fe1
JB		 712 /*
713 * set_multicast_list will be invoked by the networking core
714 * which will check whether any increments here were done in
715 * error and sync them down to the hardware as filter flags.
716 */
717 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
718 atomic_inc(&local->iff_allmultis);
719
34d4bc4d
JB		 720 if (coming_up)
721 local->open_count++;
722
59034591 723 if (hw_reconf_flags)
e8975581 724 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 725
4a733ef1 726 ieee80211_recalc_ps(local);
965bedad 727
2b436312
JB		 728 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
729 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
730 /* XXX: for AP_VLAN, actually track AP queues */
731 netif_tx_start_all_queues(dev);
732 } else if (dev) {
2b730daa
JB		 733 unsigned long flags;
734 int n_acs = IEEE80211_NUM_ACS;
735 int ac;
736
737 if (local->hw.queues < IEEE80211_NUM_ACS)
738 n_acs = 1;
739
740 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
741 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
742 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
743 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
744 for (ac = 0; ac < n_acs; ac++) {
745 int ac_queue = sdata->vif.hw_queue[ac];
746
747 if (local->queue_stop_reasons[ac_queue] == 0 &&
748 skb_queue_empty(&local->pending[ac_queue]))
749 netif_start_subqueue(dev, ac);
750 }
751 }
752 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
753 }
0d143fe1
JB		 754
755 return 0;
756 err_del_interface:
7b7eab6f 757 drv_remove_interface(local, sdata);
0d143fe1 758 err_stop:
24487981
JB		 759 if (!local->open_count)
760 drv_stop(local);
0d143fe1
JB		 761 err_del_bss:
762 sdata->bss = NULL;
4e141dad
MK		 763 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
764 mutex_lock(&local->mtx);
0d143fe1 765 list_del(&sdata->u.vlan.list);
4e141dad
MK		 766 mutex_unlock(&local->mtx);
767 }
4d6c36fa 768 /* might already be clear but that doesn't matter */
2d2080c3 769 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 770 return res;
771}
772
34d4bc4d 773static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 774{
775 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 776 int err;
777
778 /* fail early if user set an invalid address */
2fcf2824 779 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 780 return -EADDRNOTAVAIL;
781
782 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
783 if (err)
784 return err;
785
f142c6b9 786 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 787}
788
789static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
790 bool going_down)
791{
0d143fe1 792 struct ieee80211_local *local = sdata->local;
fa962b92 793 struct fq *fq = &local->fq;
5061b0c2
JB		 794 unsigned long flags;
795 struct sk_buff *skb, *tmp;
e8975581 796 u32 hw_reconf_flags = 0;
09f4114e 797 int i, flushed;
397a7a24 798 struct ps_data *ps;
d2859df5 799 struct cfg80211_chan_def chandef;
46238845 800 bool cancel_scan;
0d143fe1 801
c29acf20
RM		 802 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
803
46238845
JB		 804 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
805 if (cancel_scan)
352ffad6
BC		 806 ieee80211_scan_cancel(local);
807
0d143fe1
JB		 808 /*
809 * Stop TX on this interface first.
810 */
f142c6b9
JB		 811 if (sdata->dev)
812 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 813
c8f994ee 814 ieee80211_roc_purge(local, sdata);
af6b6374 815
8ffcc704
EG		 816 switch (sdata->vif.type) {
817 case NL80211_IFTYPE_STATION:
572078be 818 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 819 break;
820 case NL80211_IFTYPE_ADHOC:
cd7760e6 821 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 822 break;
823 case NL80211_IFTYPE_AP:
824 cancel_work_sync(&sdata->u.ap.request_smps_work);
825 break;
826 default:
827 break;
828 }
cd7760e6 829
0d143fe1
JB		 830 /*
831 * Remove all stations associated with this interface.
832 *
833 * This must be done before calling ops->remove_interface()
834 * because otherwise we can later invoke ops->sta_notify()
835 * whenever the STAs are removed, and that invalidates driver
836 * assumptions about always getting a vif pointer that is valid
837 * (because if we remove a STA after ops->remove_interface()
838 * the driver will have removed the vif info already!)
839 *
5eb8f4d7
JB		 840 * In WDS mode a station must exist here and be flushed, for
841 * AP_VLANs stations may exist since there's nothing else that
842 * would have removed them, but in other modes there shouldn't
843 * be any stations.
0d143fe1 844 */
d34ba216 845 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 846 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
847 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
848 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 849
df140465 850 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 851 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
852 atomic_dec(&local->iff_allmultis);
853
7be5086d 854 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 855 local->fif_pspoll--;
7be5086d
JB		 856 local->fif_probe_req--;
857 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
858 local->fif_probe_req--;
859 }
e3b90ca2 860
f142c6b9
JB		 861 if (sdata->dev) {
862 netif_addr_lock_bh(sdata->dev);
863 spin_lock_bh(&local->filter_lock);
864 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
865 sdata->dev->addr_len);
866 spin_unlock_bh(&local->filter_lock);
867 netif_addr_unlock_bh(sdata->dev);
f142c6b9 868 }
3ac64bee 869
7cbf0ba5
VN		 870 del_timer_sync(&local->dynamic_ps_timer);
871 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 872
04ecd257 873 cancel_work_sync(&sdata->recalc_smps);
dbd72850 874 sdata_lock(sdata);
59af6928 875 mutex_lock(&local->mtx);
73da7d5b 876 sdata->vif.csa_active = false;
0c21e632
LC		 877 if (sdata->vif.type == NL80211_IFTYPE_STATION)
878 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 879 if (sdata->csa_block_tx) {
880 ieee80211_wake_vif_queues(local, sdata,
881 IEEE80211_QUEUE_STOP_REASON_CSA);
882 sdata->csa_block_tx = false;
883 }
59af6928 884 mutex_unlock(&local->mtx);
dbd72850 885 sdata_unlock(sdata);
59af6928 886
73da7d5b 887 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 888
164eb02d
SW		 889 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
890
891 if (sdata->wdev.cac_started) {
d2859df5 892 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 893 WARN_ON(local->suspended);
34a3740d 894 mutex_lock(&local->mtx);
164eb02d 895 ieee80211_vif_release_channel(sdata);
34a3740d 896 mutex_unlock(&local->mtx);
d2859df5
JD		 897 cfg80211_cac_event(sdata->dev, &chandef,
898 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 899 GFP_KERNEL);
900 }
901
0d143fe1
JB		 902 /* APs need special treatment */
903 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 904 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 905
906 /* down all dependent devices, that is VLANs */
57c9fff3 907 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 908 u.vlan.list)
909 dev_close(vlan->dev);
910 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 911 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
912 /* remove all packets in parent bc_buf pointing to this dev */
913 ps = &sdata->bss->ps;
914
915 spin_lock_irqsave(&ps->bc_buf.lock, flags);
916 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
917 if (skb->dev == sdata->dev) {
918 __skb_unlink(skb, &ps->bc_buf);
919 local->total_ps_buffered--;
920 ieee80211_free_txskb(&local->hw, skb);
921 }
922 }
923 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 924 }
925
34d4bc4d
JB		 926 if (going_down)
927 local->open_count--;
0d143fe1
JB		 928
929 switch (sdata->vif.type) {
930 case NL80211_IFTYPE_AP_VLAN:
4e141dad 931 mutex_lock(&local->mtx);
0d143fe1 932 list_del(&sdata->u.vlan.list);
4e141dad 933 mutex_unlock(&local->mtx);
0c2bef46 934 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 935 /* see comment in the default case below */
936 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 937 /* no need to tell driver */
938 break;
939 case NL80211_IFTYPE_MONITOR:
d8212184 940 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 941 local->cooked_mntrs--;
942 break;
943 }
944
945 local->monitors--;
e8975581 946 if (local->monitors == 0) {
0869aea0
JB		 947 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
948 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 949 }
0d143fe1 950
85416a4f 951 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 952 break;
f142c6b9
JB		 953 case NL80211_IFTYPE_P2P_DEVICE:
954 /* relies on synchronize_rcu() below */
0c2bef46 955 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 956 /* fall through */
cb3b7d87 957 case NL80211_IFTYPE_NAN:
0d143fe1 958 default:
0b7dff4f 959 cancel_work_sync(&sdata->work);
35f20c14
JB		 960 /*
961 * When we get here, the interface is marked down.
7907c7d3 962 * Free the remaining keys, if there are any
10b68487
FF		 963 * (which can happen in AP mode if userspace sets
964 * keys before the interface is operating, and maybe
965 * also in WDS mode)
75de9113 966 *
7907c7d3
JB		 967 * Force the key freeing to always synchronize_net()
968 * to wait for the RX path in case it is using this
10b68487 969 * interface enqueuing frames at this very time on
75de9113 970 * another CPU.
35f20c14 971 */
7907c7d3 972 ieee80211_free_keys(sdata, true);
1861b845 973 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 974 }
975
976 sdata->bss = NULL;
977
5061b0c2
JB		 978 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
979 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
980 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
981 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
982 if (info->control.vif == &sdata->vif) {
983 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 984 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 985 }
986 }
987 }
988 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 989
ba8c3d6f
FF		 990 if (sdata->vif.txq) {
991 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
992
fa962b92
MK		 993 spin_lock_bh(&fq->lock);
994 ieee80211_txq_purge(local, txqi);
995 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 996 }
997
b2c0958b
JB		 998 if (local->open_count == 0)
999 ieee80211_clear_tx_pending(local);
1000
1001 /*
1002 * If the interface goes down while suspended, presumably because
1003 * the device was unplugged and that happens before our resume,
1004 * then the driver is already unconfigured and the remainder of
1005 * this function isn't needed.
1006 * XXX: what about WoWLAN? If the device has software state, e.g.
1007 * memory allocated, it might expect teardown commands from
1008 * mac80211 here?
1009 */
1010 if (local->suspended) {
1011 WARN_ON(local->wowlan);
1012 WARN_ON(rtnl_dereference(local->monitor_sdata));
1013 return;
1014 }
1015
1016 switch (sdata->vif.type) {
1017 case NL80211_IFTYPE_AP_VLAN:
1018 break;
1019 case NL80211_IFTYPE_MONITOR:
1020 if (local->monitors == 0)
1021 ieee80211_del_virtual_monitor(local);
1022
1023 mutex_lock(&local->mtx);
1024 ieee80211_recalc_idle(local);
1025 mutex_unlock(&local->mtx);
31eba5bc 1026
d8212184 1027 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1028 break;
1029
1030 /* fall through */
b2c0958b
JB		 1031 default:
1032 if (going_down)
1033 drv_remove_interface(local, sdata);
1034 }
1035
4a733ef1 1036 ieee80211_recalc_ps(local);
b2c0958b 1037
46238845
JB		 1038 if (cancel_scan)
1039 flush_delayed_work(&local->scan_work);
1040
b2c0958b
JB		 1041 if (local->open_count == 0) {
1042 ieee80211_stop_device(local);
1043
1044 /* no reconfiguring after stop! */
1045 return;
1046 }
1047
1048 /* do after stop to avoid reconfiguring when we stop anyway */
1049 ieee80211_configure_filter(local);
1050 ieee80211_hw_config(local, hw_reconf_flags);
1051
1052 if (local->monitors == local->open_count)
075e0847 1053 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1054}
1055
1056static int ieee80211_stop(struct net_device *dev)
1057{
1058 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1059
1060 ieee80211_do_stop(sdata, true);
5061b0c2 1061
0d143fe1
JB		 1062 return 0;
1063}
1064
1065static void ieee80211_set_multicast_list(struct net_device *dev)
1066{
0d143fe1 1067 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1068 struct ieee80211_local *local = sdata->local;
df140465 1069 int allmulti, sdata_allmulti;
0d143fe1
JB		 1070
1071 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1072 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1073
1074 if (allmulti != sdata_allmulti) {
1075 if (dev->flags & IFF_ALLMULTI)
1076 atomic_inc(&local->iff_allmultis);
1077 else
1078 atomic_dec(&local->iff_allmultis);
1079 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1080 }
1081
3b8d81e0 1082 spin_lock_bh(&local->filter_lock);
22bedad3 1083 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1084 spin_unlock_bh(&local->filter_lock);
3ac64bee 1085 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1086}
1087
75636525
JB		 1088/*
1089 * Called when the netdev is removed or, by the code below, before
1090 * the interface type changes.
1091 */
f142c6b9 1092static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1093{
1094 int i;
1095
75636525 1096 /* free extra data */
7907c7d3 1097 ieee80211_free_keys(sdata, false);
75636525 1098
aee14ceb
JM		 1099 ieee80211_debugfs_remove_netdev(sdata);
1100
f0706e82 1101 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1102 __skb_queue_purge(&sdata->fragments[i].skb_list);
1103 sdata->fragment_next = 0;
11a843b7 1104
b9dcf712 1105 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1106 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1107}
1108
f142c6b9
JB		 1109static void ieee80211_uninit(struct net_device *dev)
1110{
1111 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1112}
1113
cf0277e7 1114static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1115 struct sk_buff *skb,
99932d4f
DB		 1116 void *accel_priv,
1117 select_queue_fallback_t fallback)
cf0277e7
JB		 1118{
1119 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1120}
1121
5a490510
JB		 1122static struct rtnl_link_stats64 *
1123ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1124{
1125 int i;
1126
1127 for_each_possible_cpu(i) {
1128 const struct pcpu_sw_netstats *tstats;
1129 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1130 unsigned int start;
1131
1132 tstats = per_cpu_ptr(dev->tstats, i);
1133
1134 do {
1135 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1136 rx_packets = tstats->rx_packets;
1137 tx_packets = tstats->tx_packets;
1138 rx_bytes = tstats->rx_bytes;
1139 tx_bytes = tstats->tx_bytes;
1140 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1141
1142 stats->rx_packets += rx_packets;
1143 stats->tx_packets += tx_packets;
1144 stats->rx_bytes += rx_bytes;
1145 stats->tx_bytes += tx_bytes;
1146 }
1147
1148 return stats;
1149}
1150
587e729e
JB		 1151static const struct net_device_ops ieee80211_dataif_ops = {
1152 .ndo_open = ieee80211_open,
1153 .ndo_stop = ieee80211_stop,
f142c6b9 1154 .ndo_uninit = ieee80211_uninit,
587e729e 1155 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1156 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1157 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1158 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1159 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1160 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1161};
1162
cf0277e7 1163static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1164 struct sk_buff *skb,
99932d4f
DB		 1165 void *accel_priv,
1166 select_queue_fallback_t fallback)
cf0277e7
JB		 1167{
1168 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1169 struct ieee80211_local *local = sdata->local;
1170 struct ieee80211_hdr *hdr;
1171 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1172
32c5057b 1173 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1174 return 0;
1175
1176 if (skb->len < 4 ||
b49bb574 1177 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1178 return 0; /* doesn't matter, frame will be dropped */
1179
b49bb574 1180 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1181
00e96dec 1182 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1183}
1184
587e729e
JB		 1185static const struct net_device_ops ieee80211_monitorif_ops = {
1186 .ndo_open = ieee80211_open,
1187 .ndo_stop = ieee80211_stop,
f142c6b9 1188 .ndo_uninit = ieee80211_uninit,
587e729e 1189 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1190 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1191 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1192 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1193 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1194 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1195};
1196
5a490510
JB		 1197static void ieee80211_if_free(struct net_device *dev)
1198{
1199 free_percpu(dev->tstats);
1200 free_netdev(dev);
1201}
1202
587e729e
JB		 1203static void ieee80211_if_setup(struct net_device *dev)
1204{
1205 ether_setup(dev);
550fd08c 1206 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1207 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1208 dev->destructor = ieee80211_if_free;
587e729e
JB		 1209}
1210
80a83cfc
MK		 1211static void ieee80211_if_setup_no_queue(struct net_device *dev)
1212{
1213 ieee80211_if_setup(dev);
1214 dev->priv_flags |= IFF_NO_QUEUE;
1215}
1216
1fa57d01
JB		 1217static void ieee80211_iface_work(struct work_struct *work)
1218{
1219 struct ieee80211_sub_if_data *sdata =
1220 container_of(work, struct ieee80211_sub_if_data, work);
1221 struct ieee80211_local *local = sdata->local;
1222 struct sk_buff *skb;
344eec67 1223 struct sta_info *sta;
c1475ca9 1224 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1225 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1226
1227 if (!ieee80211_sdata_running(sdata))
1228 return;
1229
fc58c47e 1230 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1231 return;
1232
4afaff17 1233 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1234 return;
1235
1236 /* first process frames */
1237 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1238 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1239
c1475ca9
JB		 1240 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1241 ra_tid = (void *)&skb->cb;
1242 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1243 ra_tid->tid);
1244 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1245 ra_tid = (void *)&skb->cb;
1246 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1247 ra_tid->tid);
08cf42e8
MK		 1248 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1249 rx_agg = (void *)&skb->cb;
1250 mutex_lock(&local->sta_mtx);
1251 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1252 if (sta)
08cf42e8 1253 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1254 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1255 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1256 false, true);
08cf42e8
MK		 1257 mutex_unlock(&local->sta_mtx);
1258 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1259 rx_agg = (void *)&skb->cb;
1260 mutex_lock(&local->sta_mtx);
1261 sta = sta_info_get_bss(sdata, rx_agg->addr);
1262 if (sta)
1263 __ieee80211_stop_rx_ba_session(sta,
1264 rx_agg->tid,
1265 WLAN_BACK_RECIPIENT, 0,
1266 false);
1267 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1268 } else if (ieee80211_is_action(mgmt->frame_control) &&
1269 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1270 int len = skb->len;
bed7ee6e 1271
a93e3644 1272 mutex_lock(&local->sta_mtx);
875ae5f6 1273 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1274 if (sta) {
1275 switch (mgmt->u.action.u.addba_req.action_code) {
1276 case WLAN_ACTION_ADDBA_REQ:
1277 ieee80211_process_addba_request(
1278 local, sta, mgmt, len);
1279 break;
1280 case WLAN_ACTION_ADDBA_RESP:
1281 ieee80211_process_addba_resp(local, sta,
1282 mgmt, len);
1283 break;
1284 case WLAN_ACTION_DELBA:
1285 ieee80211_process_delba(sdata, sta,
1286 mgmt, len);
1287 break;
1288 default:
1289 WARN_ON(1);
1290 break;
1291 }
1292 }
a93e3644 1293 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1294 } else if (ieee80211_is_action(mgmt->frame_control) &&
1295 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1296 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1297 case WLAN_VHT_ACTION_GROUPID_MGMT:
1298 ieee80211_process_mu_groups(sdata, mgmt);
1299 break;
1300 default:
1301 WARN_ON(1);
1302 break;
1303 }
344eec67
JB		 1304 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1305 struct ieee80211_hdr *hdr = (void *)mgmt;
1306 /*
1307 * So the frame isn't mgmt, but frame_control
1308 * is at the right place anyway, of course, so
1309 * the if statement is correct.
1310 *
1311 * Warn if we have other data frame types here,
1312 * they must not get here.
1313 */
1314 WARN_ON(hdr->frame_control &
1315 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1316 WARN_ON(!(hdr->seq_ctrl &
1317 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1318 /*
1319 * This was a fragment of a frame, received while
1320 * a block-ack session was active. That cannot be
1321 * right, so terminate the session.
1322 */
a93e3644 1323 mutex_lock(&local->sta_mtx);
875ae5f6 1324 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1325 if (sta) {
1326 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1327 IEEE80211_QOS_CTL_TID_MASK;
1328
1329 __ieee80211_stop_rx_ba_session(
1330 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1331 WLAN_REASON_QSTA_REQUIRE_SETUP,
1332 true);
344eec67 1333 }
a93e3644 1334 mutex_unlock(&local->sta_mtx);
bed7ee6e 1335 } else switch (sdata->vif.type) {
1fa57d01
JB		 1336 case NL80211_IFTYPE_STATION:
1337 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1338 break;
1339 case NL80211_IFTYPE_ADHOC:
1340 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1341 break;
1342 case NL80211_IFTYPE_MESH_POINT:
1343 if (!ieee80211_vif_is_mesh(&sdata->vif))
1344 break;
1345 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1346 break;
1347 default:
1348 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1349 break;
1350 }
36b3a628
JB		 1351
1352 kfree_skb(skb);
1fa57d01
JB		 1353 }
1354
1355 /* then other type-dependent work */
1356 switch (sdata->vif.type) {
1357 case NL80211_IFTYPE_STATION:
1358 ieee80211_sta_work(sdata);
1359 break;
1360 case NL80211_IFTYPE_ADHOC:
1361 ieee80211_ibss_work(sdata);
1362 break;
1363 case NL80211_IFTYPE_MESH_POINT:
1364 if (!ieee80211_vif_is_mesh(&sdata->vif))
1365 break;
1366 ieee80211_mesh_work(sdata);
1367 break;
239281f8
RL		 1368 case NL80211_IFTYPE_OCB:
1369 ieee80211_ocb_work(sdata);
1370 break;
1fa57d01
JB		 1371 default:
1372 break;
1373 }
1374}
1375
04ecd257
JB		 1376static void ieee80211_recalc_smps_work(struct work_struct *work)
1377{
1378 struct ieee80211_sub_if_data *sdata =
1379 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1380
1381 ieee80211_recalc_smps(sdata);
1382}
1fa57d01 1383
75636525
JB		 1384/*
1385 * Helper function to initialise an interface to a specific type.
1386 */
1387static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1388 enum nl80211_iftype type)
f0706e82 1389{
239281f8
RL		 1390 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1391 0xff, 0xff, 0xff};
1392
75636525
JB		 1393 /* clear type-dependent union */
1394 memset(&sdata->u, 0, sizeof(sdata->u));
1395
1396 /* and set some type-dependent values */
1397 sdata->vif.type = type;
2ca27bcf 1398 sdata->vif.p2p = false;
60719ffd 1399 sdata->wdev.iftype = type;
75636525 1400
a621fa4d
JB		 1401 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1402 sdata->control_port_no_encrypt = false;
2475b1cc 1403 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1404 sdata->vif.bss_conf.idle = true;
a621fa4d 1405
b53be792
SW		 1406 sdata->noack_map = 0;
1407
f142c6b9
JB		 1408 /* only monitor/p2p-device differ */
1409 if (sdata->dev) {
1410 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1411 sdata->dev->type = ARPHRD_ETHER;
1412 }
75636525 1413
35f20c14 1414 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1415 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1416 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1417 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1418 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1419 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1420
75636525 1421 switch (type) {
2ca27bcf
JB		 1422 case NL80211_IFTYPE_P2P_GO:
1423 type = NL80211_IFTYPE_AP;
1424 sdata->vif.type = type;
1425 sdata->vif.p2p = true;
1426 /* fall through */
05c914fe 1427 case NL80211_IFTYPE_AP:
d012a605 1428 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1429 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1430 INIT_WORK(&sdata->u.ap.request_smps_work,
1431 ieee80211_request_smps_ap_work);
ad2d223a 1432 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1433 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1434 break;
2ca27bcf
JB		 1435 case NL80211_IFTYPE_P2P_CLIENT:
1436 type = NL80211_IFTYPE_STATION;
1437 sdata->vif.type = type;
1438 sdata->vif.p2p = true;
1439 /* fall through */
05c914fe 1440 case NL80211_IFTYPE_STATION:
ad2d223a 1441 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1442 ieee80211_sta_setup_sdata(sdata);
472dbc45 1443 break;
6e0bd6c3 1444 case NL80211_IFTYPE_OCB:
239281f8
RL		 1445 sdata->vif.bss_conf.bssid = bssid_wildcard;
1446 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1447 break;
46900298 1448 case NL80211_IFTYPE_ADHOC:
ad2d223a 1449 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1450 ieee80211_ibss_setup_sdata(sdata);
1451 break;
05c914fe 1452 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1453 if (ieee80211_vif_is_mesh(&sdata->vif))
1454 ieee80211_mesh_init_sdata(sdata);
1455 break;
05c914fe 1456 case NL80211_IFTYPE_MONITOR:
75636525 1457 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1458 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1459 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1460 MONITOR_FLAG_OTHER_BSS;
1461 break;
05c914fe 1462 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1463 sdata->vif.bss_conf.bssid = NULL;
1464 break;
05c914fe 1465 case NL80211_IFTYPE_AP_VLAN:
98104fde 1466 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 1467 case NL80211_IFTYPE_NAN:
ad2d223a 1468 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1469 break;
05c914fe 1470 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1471 case NUM_NL80211_IFTYPES:
75636525
JB		 1472 BUG();
1473 break;
1474 }
1475
1476 ieee80211_debugfs_add_netdev(sdata);
1477}
1478
34d4bc4d
JB		 1479static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1480 enum nl80211_iftype type)
1481{
1482 struct ieee80211_local *local = sdata->local;
1483 int ret, err;
2ca27bcf
JB		 1484 enum nl80211_iftype internal_type = type;
1485 bool p2p = false;
34d4bc4d
JB		 1486
1487 ASSERT_RTNL();
1488
1489 if (!local->ops->change_interface)
1490 return -EBUSY;
1491
1492 switch (sdata->vif.type) {
1493 case NL80211_IFTYPE_AP:
1494 case NL80211_IFTYPE_STATION:
1495 case NL80211_IFTYPE_ADHOC:
239281f8 1496 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1497 /*
1498 * Could maybe also all others here?
1499 * Just not sure how that interacts
1500 * with the RX/config path e.g. for
1501 * mesh.
1502 */
1503 break;
1504 default:
1505 return -EBUSY;
1506 }
1507
1508 switch (type) {
1509 case NL80211_IFTYPE_AP:
1510 case NL80211_IFTYPE_STATION:
1511 case NL80211_IFTYPE_ADHOC:
239281f8 1512 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1513 /*
1514 * Could probably support everything
1515 * but WDS here (WDS do_open can fail
1516 * under memory pressure, which this
1517 * code isn't prepared to handle).
1518 */
1519 break;
2ca27bcf
JB		 1520 case NL80211_IFTYPE_P2P_CLIENT:
1521 p2p = true;
1522 internal_type = NL80211_IFTYPE_STATION;
1523 break;
1524 case NL80211_IFTYPE_P2P_GO:
1525 p2p = true;
1526 internal_type = NL80211_IFTYPE_AP;
1527 break;
34d4bc4d
JB		 1528 default:
1529 return -EBUSY;
1530 }
1531
2ca27bcf 1532 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1533 if (ret)
1534 return ret;
1535
1536 ieee80211_do_stop(sdata, false);
1537
f142c6b9 1538 ieee80211_teardown_sdata(sdata);
34d4bc4d 1539
2ca27bcf 1540 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1541 if (ret)
a9865538 1542 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1543
3a25a8c8
JB		 1544 /*
1545 * Ignore return value here, there's not much we can do since
1546 * the driver changed the interface type internally already.
1547 * The warnings will hopefully make driver authors fix it :-)
1548 */
a9865538 1549 ieee80211_check_queues(sdata, type);
3a25a8c8 1550
34d4bc4d
JB		 1551 ieee80211_setup_sdata(sdata, type);
1552
f142c6b9 1553 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1554 WARN(err, "type change: do_open returned %d", err);
1555
1556 return ret;
1557}
1558
f3947e2d 1559int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1560 enum nl80211_iftype type)
75636525 1561{
34d4bc4d
JB		 1562 int ret;
1563
f3947e2d
JB		 1564 ASSERT_RTNL();
1565
2ca27bcf 1566 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1567 return 0;
1568
34d4bc4d
JB		 1569 if (ieee80211_sdata_running(sdata)) {
1570 ret = ieee80211_runtime_change_iftype(sdata, type);
1571 if (ret)
1572 return ret;
1573 } else {
1574 /* Purge and reset type-dependent state. */
f142c6b9 1575 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1576 ieee80211_setup_sdata(sdata, type);
1577 }
75636525
JB		 1578
1579 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1580 if (type == NL80211_IFTYPE_STATION)
1581 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1582
1583 return 0;
f0706e82
JB		 1584}
1585
fa9029f8 1586static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1587 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1588{
1589 struct ieee80211_sub_if_data *sdata;
1590 u64 mask, start, addr, val, inc;
1591 u8 *m;
1592 u8 tmp_addr[ETH_ALEN];
1593 int i;
1594
1595 /* default ... something at least */
f142c6b9 1596 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1597
1598 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1599 local->hw.wiphy->n_addresses <= 1)
1600 return;
1601
fa9029f8
JB		 1602 mutex_lock(&local->iflist_mtx);
1603
1604 switch (type) {
1605 case NL80211_IFTYPE_MONITOR:
1606 /* doesn't matter */
1607 break;
1608 case NL80211_IFTYPE_WDS:
1609 case NL80211_IFTYPE_AP_VLAN:
1610 /* match up with an AP interface */
1611 list_for_each_entry(sdata, &local->interfaces, list) {
1612 if (sdata->vif.type != NL80211_IFTYPE_AP)
1613 continue;
f142c6b9 1614 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1615 break;
1616 }
1617 /* keep default if no AP interface present */
1618 break;
6d71117a
JB		 1619 case NL80211_IFTYPE_P2P_CLIENT:
1620 case NL80211_IFTYPE_P2P_GO:
30686bf7 1621 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1622 list_for_each_entry(sdata, &local->interfaces, list) {
1623 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1624 continue;
1625 if (!ieee80211_sdata_running(sdata))
1626 continue;
1627 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1628 goto out_unlock;
1629 }
1630 }
1631 /* otherwise fall through */
fa9029f8
JB		 1632 default:
1633 /* assign a new address if possible -- try n_addresses first */
1634 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1635 bool used = false;
1636
1637 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1638 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1639 sdata->vif.addr)) {
fa9029f8
JB		 1640 used = true;
1641 break;
1642 }
1643 }
1644
1645 if (!used) {
f142c6b9 1646 memcpy(perm_addr,
fa9029f8
JB		 1647 local->hw.wiphy->addresses[i].addr,
1648 ETH_ALEN);
1649 break;
1650 }
1651 }
1652
1653 /* try mask if available */
1654 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1655 break;
1656
1657 m = local->hw.wiphy->addr_mask;
1658 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1659 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1660 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1661
1662 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1663 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1664 pr_info("not contiguous\n");
fa9029f8
JB		 1665 break;
1666 }
1667
ac20976d
HS		 1668 /*
1669 * Pick address of existing interface in case user changed
1670 * MAC address manually, default to perm_addr.
1671 */
fa9029f8 1672 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1673 list_for_each_entry(sdata, &local->interfaces, list) {
1674 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1675 continue;
1676 m = sdata->vif.addr;
1677 break;
1678 }
fa9029f8
JB		 1679 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1680 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1681 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1682
1683 inc = 1ULL<<__ffs64(mask);
1684 val = (start & mask);
1685 addr = (start & ~mask) | (val & mask);
1686 do {
1687 bool used = false;
1688
1689 tmp_addr[5] = addr >> 0*8;
1690 tmp_addr[4] = addr >> 1*8;
1691 tmp_addr[3] = addr >> 2*8;
1692 tmp_addr[2] = addr >> 3*8;
1693 tmp_addr[1] = addr >> 4*8;
1694 tmp_addr[0] = addr >> 5*8;
1695
1696 val += inc;
1697
1698 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1699 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1700 used = true;
1701 break;
1702 }
1703 }
1704
1705 if (!used) {
f142c6b9 1706 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1707 break;
1708 }
1709 addr = (start & ~mask) | (val & mask);
1710 } while (addr != start);
1711
1712 break;
1713 }
1714
6d71117a 1715 out_unlock:
fa9029f8
JB		 1716 mutex_unlock(&local->iflist_mtx);
1717}
1718
3e122be0 1719int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1720 unsigned char name_assign_type,
84efbb84 1721 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1722 struct vif_params *params)
f0706e82 1723{
f142c6b9 1724 struct net_device *ndev = NULL;
f0706e82 1725 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1726 struct txq_info *txqi;
80a83cfc 1727 void (*if_setup)(struct net_device *dev);
75636525 1728 int ret, i;
ded81f6b 1729 int txqs = 1;
f0706e82
JB		 1730
1731 ASSERT_RTNL();
75636525 1732
708d50ed 1733 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1734 struct wireless_dev *wdev;
1735
1736 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1737 GFP_KERNEL);
1738 if (!sdata)
1739 return -ENOMEM;
1740 wdev = &sdata->wdev;
1741
1742 sdata->dev = NULL;
1743 strlcpy(sdata->name, name, IFNAMSIZ);
1744 ieee80211_assign_perm_addr(local, wdev->address, type);
1745 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1746 } else {
ba8c3d6f
FF		 1747 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1748 sizeof(void *));
1749 int txq_size = 0;
1750
1751 if (local->ops->wake_tx_queue)
1752 txq_size += sizeof(struct txq_info) +
1753 local->hw.txq_data_size;
1754
80a83cfc
MK		 1755 if (local->ops->wake_tx_queue)
1756 if_setup = ieee80211_if_setup_no_queue;
1757 else
1758 if_setup = ieee80211_if_setup;
1759
f142c6b9
JB		 1760 if (local->hw.queues >= IEEE80211_NUM_ACS)
1761 txqs = IEEE80211_NUM_ACS;
1762
ba8c3d6f 1763 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1764 name, name_assign_type,
80a83cfc 1765 if_setup, txqs, 1);
f142c6b9
JB		 1766 if (!ndev)
1767 return -ENOMEM;
1768 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1769
5a490510
JB		 1770 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1771 if (!ndev->tstats) {
1772 free_netdev(ndev);
1773 return -ENOMEM;
1774 }
1775
f142c6b9
JB		 1776 ndev->needed_headroom = local->tx_headroom +
1777 4*6 /* four MAC addresses */
1778 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1779 + 6 /* mesh */
1780 + 8 /* rfc1042/bridge tunnel */
1781 - ETH_HLEN /* ethernet hard_header_len */
1782 + IEEE80211_ENCRYPT_HEADROOM;
1783 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1784
1785 ret = dev_alloc_name(ndev, ndev->name);
1786 if (ret < 0) {
e6436be2 1787 ieee80211_if_free(ndev);
f142c6b9
JB		 1788 return ret;
1789 }
1790
1791 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1792 if (params && is_valid_ether_addr(params->macaddr))
1793 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1794 else
1795 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1796 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1797
1798 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1799 sdata = netdev_priv(ndev);
1800 ndev->ieee80211_ptr = &sdata->wdev;
1801 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1802 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1803
ba8c3d6f
FF		 1804 if (txq_size) {
1805 txqi = netdev_priv(ndev) + size;
fa962b92 1806 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1807 }
1808
f142c6b9
JB		 1809 sdata->dev = ndev;
1810 }
75636525
JB		 1811
1812 /* initialise type-independent data */
f0706e82 1813 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1814 sdata->local = local;
75636525
JB		 1815
1816 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1817 skb_queue_head_init(&sdata->fragments[i].skb_list);
1818
1819 INIT_LIST_HEAD(&sdata->key_list);
1820
164eb02d
SW		 1821 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1822 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1823 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1824 ieee80211_delayed_tailroom_dec);
97f97b1f 1825
57fbcce3 1826 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1827 struct ieee80211_supported_band *sband;
1828 sband = local->hw.wiphy->bands[i];
1829 sdata->rc_rateidx_mask[i] =
1830 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1831 if (sband) {
1832 __le16 cap;
1833 u16 *vht_rate_mask;
1834
19468413
SW		 1835 memcpy(sdata->rc_rateidx_mcs_mask[i],
1836 sband->ht_cap.mcs.rx_mask,
1837 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1838
1839 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1840 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1841 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1842 } else {
19468413
SW		 1843 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1844 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1845 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1846 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1847 }
37eb0b16 1848 }
75636525 1849
3a25a8c8
JB		 1850 ieee80211_set_default_queues(sdata);
1851
1ea6f9c0
JB		 1852 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1853 sdata->user_power_level = local->user_power_level;
1854
2475b1cc
MS		 1855 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1856
75636525
JB		 1857 /* setup type-dependent data */
1858 ieee80211_setup_sdata(sdata, type);
f0706e82 1859
f142c6b9
JB		 1860 if (ndev) {
1861 if (params) {
1862 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1863 if (type == NL80211_IFTYPE_STATION)
1864 sdata->u.mgd.use_4addr = params->use_4addr;
1865 }
9bc383de 1866
f142c6b9 1867 ndev->features |= local->hw.netdev_features;
72d78728 1868
b7ffbd7e
JB		 1869 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1870
f142c6b9
JB		 1871 ret = register_netdevice(ndev);
1872 if (ret) {
e6436be2 1873 ieee80211_if_free(ndev);
f142c6b9
JB		 1874 return ret;
1875 }
1876 }
f0706e82 1877
c771c9d8 1878 mutex_lock(&local->iflist_mtx);
79010420 1879 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1880 mutex_unlock(&local->iflist_mtx);
79010420 1881
84efbb84
JB		 1882 if (new_wdev)
1883 *new_wdev = &sdata->wdev;
f0706e82 1884
f0706e82 1885 return 0;
f0706e82
JB		 1886}
1887
f698d856 1888void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1889{
f0706e82 1890 ASSERT_RTNL();
11a843b7 1891
c771c9d8 1892 mutex_lock(&sdata->local->iflist_mtx);
75636525 1893 list_del_rcu(&sdata->list);
c771c9d8
JB		 1894 mutex_unlock(&sdata->local->iflist_mtx);
1895
75636525 1896 synchronize_rcu();
f142c6b9
JB		 1897
1898 if (sdata->dev) {
1899 unregister_netdevice(sdata->dev);
1900 } else {
1901 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1902 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1903 kfree(sdata);
1904 }
1905}
1906
1907void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1908{
1909 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1910 return;
1911 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1912}
1913
75636525 1914void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1915{
75636525 1916 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1917 LIST_HEAD(unreg_list);
f142c6b9 1918 LIST_HEAD(wdev_list);
f0706e82
JB		 1919
1920 ASSERT_RTNL();
1921
d8d9008c
JB		 1922 /* Before destroying the interfaces, make sure they're all stopped so
1923 * that the hardware is stopped. Otherwise, the driver might still be
1924 * iterating the interfaces during the shutdown, e.g. from a worker
1925 * or from RX processing or similar, and if it does so (using atomic
1926 * iteration) while we're manipulating the list, the iteration will
1927 * crash.
1928 *
1929 * After this, the hardware should be stopped and the driver should
1930 * have stopped all of its activities, so that we can do RCU-unaware
1931 * manipulations of the interface list below.
c8aa22db 1932 */
d8d9008c
JB		 1933 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1934
1935 WARN(local->open_count, "%s: open count remains %d\n",
1936 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1937
efe117ab 1938 mutex_lock(&local->iflist_mtx);
75636525
JB		 1939 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1940 list_del(&sdata->list);
c771c9d8 1941
f142c6b9
JB		 1942 if (sdata->dev)
1943 unregister_netdevice_queue(sdata->dev, &unreg_list);
1944 else
1945 list_add(&sdata->list, &wdev_list);
f0706e82 1946 }
efe117ab
ED		 1947 mutex_unlock(&local->iflist_mtx);
1948 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1949
1950 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1951 list_del(&sdata->list);
1952 cfg80211_unregister_wdev(&sdata->wdev);
1953 kfree(sdata);
1954 }
f0706e82 1955}
5cff20e6 1956
47846c9b 1957static int netdev_notify(struct notifier_block *nb,
351638e7 1958 unsigned long state, void *ptr)
47846c9b 1959{
351638e7 1960 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1961 struct ieee80211_sub_if_data *sdata;
1962
1963 if (state != NETDEV_CHANGENAME)
8bd811aa 1964 return NOTIFY_DONE;
47846c9b
JB		 1965
1966 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1967 return NOTIFY_DONE;
47846c9b
JB		 1968
1969 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1970 return NOTIFY_DONE;
47846c9b
JB		 1971
1972 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1973 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1974 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1975
1976 return NOTIFY_OK;
47846c9b
JB		 1977}
1978
1979static struct notifier_block mac80211_netdev_notifier = {
1980 .notifier_call = netdev_notify,
1981};
1982
1983int ieee80211_iface_init(void)
1984{
1985 return register_netdevice_notifier(&mac80211_netdev_notifier);
1986}
1987
1988void ieee80211_iface_exit(void)
1989{
1990 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1991}
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