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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
d2941df8 9 * Copyright (c) 2016 Intel Deutschland GmbH
a50e5fb8 10 * Copyright (C) 2018 Intel Corporation
f0706e82
JB		 11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
5a0e3ad6 16#include <linux/slab.h>
f0706e82
JB		 17#include <linux/kernel.h>
18#include <linux/if_arp.h>
19#include <linux/netdevice.h>
20#include <linux/rtnetlink.h>
21#include <net/mac80211.h>
cf0277e7 22#include <net/ieee80211_radiotap.h>
f0706e82
JB		 23#include "ieee80211_i.h"
24#include "sta_info.h"
e9f207f0 25#include "debugfs_netdev.h"
ee385855 26#include "mesh.h"
0d143fe1 27#include "led.h"
24487981 28#include "driver-ops.h"
cf0277e7 29#include "wme.h"
1be7fe8d 30#include "rate.h"
0d143fe1 31
c771c9d8
JB		 32/**
33 * DOC: Interface list locking
34 *
35 * The interface list in each struct ieee80211_local is protected
36 * three-fold:
37 *
38 * (1) modifications may only be done under the RTNL
39 * (2) modifications and readers are protected against each other by
40 * the iflist_mtx.
41 * (3) modifications are done in an RCU manner so atomic readers
42 * can traverse the list in RCU-safe blocks.
43 *
44 * As a consequence, reads (traversals) of the list can be protected
45 * by either the RTNL, the iflist_mtx or RCU.
46 */
47
42bd20d9
AE		 48static void ieee80211_iface_work(struct work_struct *work);
49
1ea6f9c0
JB		 50bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
51{
52 struct ieee80211_chanctx_conf *chanctx_conf;
53 int power;
54
55 rcu_read_lock();
56 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
57 if (!chanctx_conf) {
58 rcu_read_unlock();
59 return false;
60 }
61
0430c883 62 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 63 rcu_read_unlock();
64
65 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->user_power_level);
67
68 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
69 power = min(power, sdata->ap_power_level);
70
71 if (power != sdata->vif.bss_conf.txpower) {
72 sdata->vif.bss_conf.txpower = power;
73 ieee80211_hw_config(sdata->local, 0);
74 return true;
75 }
76
77 return false;
78}
79
db82d8a9
LB		 80void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
81 bool update_bss)
1ea6f9c0 82{
5ad11b50
EG		 83 if (__ieee80211_recalc_txpower(sdata) ||
84 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 85 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
86}
c771c9d8 87
62a40a15 88static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 89{
90 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
91 return 0;
92
93 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
94 return IEEE80211_CONF_CHANGE_IDLE;
95}
96
62a40a15 97static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 98{
99 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
100 return 0;
101
3b24f4c6 102 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 103
104 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
105 return IEEE80211_CONF_CHANGE_IDLE;
106}
107
62a40a15
JB		 108static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
109 bool force_active)
cc45ae54 110{
1d5e1266 111 bool working, scanning, active;
cc45ae54 112 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 113
cc45ae54
JB		 114 lockdep_assert_held(&local->mtx);
115
62a40a15
JB		 116 active = force_active ||
117 !list_empty(&local->chanctx_list) ||
118 local->monitors;
cc45ae54 119
1d5e1266
JB		 120 working = !local->ops->remain_on_channel &&
121 !list_empty(&local->roc_list);
cc45ae54 122
f1e3e051
JB		 123 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
124 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 125
cc45ae54
JB		 126 if (working || scanning)
127 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 else
129 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130
fd0f979a 131 if (active)
cc45ae54
JB		 132 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133 else
134 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
135
136 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
137
fd0f979a 138 if (working || scanning || active)
62a40a15
JB		 139 return __ieee80211_idle_off(local);
140 return __ieee80211_idle_on(local);
141}
142
143u32 ieee80211_idle_off(struct ieee80211_local *local)
144{
145 return __ieee80211_recalc_idle(local, true);
146}
147
148void ieee80211_recalc_idle(struct ieee80211_local *local)
149{
150 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 151 if (change)
152 ieee80211_hw_config(local, change);
cc45ae54
JB		 153}
154
3899ba90 155static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 156 bool check_dup)
478622e8 157{
ac20976d
HS		 158 struct ieee80211_local *local = sdata->local;
159 struct ieee80211_sub_if_data *iter;
478622e8
HS		 160 u64 new, mask, tmp;
161 u8 *m;
162 int ret = 0;
163
164 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
165 return 0;
166
167 m = addr;
168 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
169 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
170 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
171
172 m = local->hw.wiphy->addr_mask;
173 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
176
31eba5bc
FF		 177 if (!check_dup)
178 return ret;
478622e8
HS		 179
180 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 181 list_for_each_entry(iter, &local->interfaces, list) {
182 if (iter == sdata)
478622e8
HS		 183 continue;
184
3899ba90 185 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 186 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 187 continue;
188
ac20976d 189 m = iter->vif.addr;
478622e8
HS		 190 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
191 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
192 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
193
194 if ((new & ~mask) != (tmp & ~mask)) {
195 ret = -EINVAL;
196 break;
197 }
198 }
199 mutex_unlock(&local->iflist_mtx);
200
201 return ret;
202}
203
47846c9b
JB		 204static int ieee80211_change_mac(struct net_device *dev, void *addr)
205{
206 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 207 struct sockaddr *sa = addr;
31eba5bc 208 bool check_dup = true;
47846c9b
JB		 209 int ret;
210
9607e6b6 211 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 212 return -EBUSY;
213
31eba5bc 214 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
d8212184 215 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 216 check_dup = false;
217
3899ba90 218 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 219 if (ret)
220 return ret;
221
fc5f7577 222 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 223
224 if (ret == 0)
fc5f7577 225 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 226
227 return ret;
228}
229
0d143fe1
JB		 230static inline int identical_mac_addr_allowed(int type1, int type2)
231{
232 return type1 == NL80211_IFTYPE_MONITOR ||
233 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 234 type1 == NL80211_IFTYPE_P2P_DEVICE ||
235 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 236 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
237 (type1 == NL80211_IFTYPE_WDS &&
238 (type2 == NL80211_IFTYPE_WDS ||
239 type2 == NL80211_IFTYPE_AP)) ||
240 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
241 (type1 == NL80211_IFTYPE_AP_VLAN &&
242 (type2 == NL80211_IFTYPE_AP ||
243 type2 == NL80211_IFTYPE_AP_VLAN));
244}
245
87490f6d
JB		 246static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
247 enum nl80211_iftype iftype)
0d143fe1 248{
b4a4bf5d 249 struct ieee80211_local *local = sdata->local;
87490f6d 250 struct ieee80211_sub_if_data *nsdata;
b6a55015 251 int ret;
0d143fe1 252
87490f6d 253 ASSERT_RTNL();
0d143fe1
JB		 254
255 /* we hold the RTNL here so can safely walk the list */
256 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 257 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 258 /*
259 * Only OCB and monitor mode may coexist
260 */
261 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
262 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
263 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
264 nsdata->vif.type == NL80211_IFTYPE_OCB))
265 return -EBUSY;
266
0d143fe1
JB		 267 /*
268 * Allow only a single IBSS interface to be up at any
269 * time. This is restricted because beacon distribution
270 * cannot work properly if both are in the same IBSS.
271 *
272 * To remove this restriction we'd have to disallow them
273 * from setting the same SSID on different IBSS interfaces
274 * belonging to the same hardware. Then, however, we're
275 * faced with having to adopt two different TSF timers...
276 */
87490f6d 277 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 278 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
279 return -EBUSY;
73da7d5b
SW		 280 /*
281 * will not add another interface while any channel
282 * switch is active.
283 */
284 if (nsdata->vif.csa_active)
285 return -EBUSY;
0d143fe1
JB		 286
287 /*
288 * The remaining checks are only performed for interfaces
289 * with the same MAC address.
290 */
371a255e
JB		 291 if (!ether_addr_equal(sdata->vif.addr,
292 nsdata->vif.addr))
0d143fe1
JB		 293 continue;
294
295 /*
296 * check whether it may have the same address
297 */
87490f6d 298 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 299 nsdata->vif.type))
300 return -ENOTUNIQ;
301
302 /*
303 * can only add VLANs to enabled APs
304 */
87490f6d 305 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 306 nsdata->vif.type == NL80211_IFTYPE_AP)
307 sdata->bss = &nsdata->u.ap;
308 }
309 }
310
b6a55015
LC		 311 mutex_lock(&local->chanctx_mtx);
312 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
313 mutex_unlock(&local->chanctx_mtx);
314 return ret;
87490f6d
JB		 315}
316
a9865538
JB		 317static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
318 enum nl80211_iftype iftype)
3a25a8c8
JB		 319{
320 int n_queues = sdata->local->hw.queues;
321 int i;
322
708d50ed
AB		 323 if (iftype == NL80211_IFTYPE_NAN)
324 return 0;
325
a9865538 326 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 327 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
329 IEEE80211_INVAL_HW_QUEUE))
330 return -EINVAL;
331 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
332 n_queues))
333 return -EINVAL;
334 }
3a25a8c8
JB		 335 }
336
a9865538
JB		 337 if ((iftype != NL80211_IFTYPE_AP &&
338 iftype != NL80211_IFTYPE_P2P_GO &&
339 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 340 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 341 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
342 return 0;
343 }
344
345 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
346 return -EINVAL;
347
348 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
349 return -EINVAL;
350
351 return 0;
352}
353
85416a4f
CL		 354void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
355 const int offset)
356{
357 struct ieee80211_local *local = sdata->local;
d8212184 358 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 359
360#define ADJUST(_f, _s) do { \
361 if (flags & MONITOR_FLAG_##_f) \
362 local->fif_##_s += offset; \
363 } while (0)
364
365 ADJUST(FCSFAIL, fcsfail);
366 ADJUST(PLCPFAIL, plcpfail);
367 ADJUST(CONTROL, control);
368 ADJUST(CONTROL, pspoll);
369 ADJUST(OTHER_BSS, other_bss);
370
371#undef ADJUST
372}
373
3a25a8c8
JB		 374static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
375{
376 struct ieee80211_local *local = sdata->local;
377 int i;
378
379 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 380 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 381 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 382 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 383 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 384 else
385 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 386 }
387 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
388}
389
3c3e21e7 390int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 391{
392 struct ieee80211_sub_if_data *sdata;
8b305780 393 int ret;
4b6f1dd6 394
30686bf7 395 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 396 return 0;
397
8b305780 398 ASSERT_RTNL();
685fb72b 399
4b6f1dd6 400 if (local->monitor_sdata)
8b305780 401 return 0;
4b6f1dd6
JB		 402
403 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 404 if (!sdata)
405 return -ENOMEM;
4b6f1dd6
JB		 406
407 /* set up data */
408 sdata->local = local;
409 sdata->vif.type = NL80211_IFTYPE_MONITOR;
410 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
411 wiphy_name(local->hw.wiphy));
34171dc0 412 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 413
2475b1cc
MS		 414 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
415
3a25a8c8
JB		 416 ieee80211_set_default_queues(sdata);
417
4b6f1dd6
JB		 418 ret = drv_add_interface(local, sdata);
419 if (WARN_ON(ret)) {
420 /* ok .. stupid driver, it asked for this! */
421 kfree(sdata);
8b305780 422 return ret;
4b6f1dd6
JB		 423 }
424
a9865538 425 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 426 if (ret) {
427 kfree(sdata);
8b305780 428 return ret;
3a25a8c8
JB		 429 }
430
fab57a6c
JB		 431 mutex_lock(&local->iflist_mtx);
432 rcu_assign_pointer(local->monitor_sdata, sdata);
433 mutex_unlock(&local->iflist_mtx);
434
34a3740d 435 mutex_lock(&local->mtx);
4bf88530 436 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 437 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 438 mutex_unlock(&local->mtx);
55de908a 439 if (ret) {
fab57a6c 440 mutex_lock(&local->iflist_mtx);
0c2bef46 441 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 442 mutex_unlock(&local->iflist_mtx);
443 synchronize_net();
55de908a
JB		 444 drv_remove_interface(local, sdata);
445 kfree(sdata);
8b305780 446 return ret;
55de908a
JB		 447 }
448
42bd20d9
AE		 449 skb_queue_head_init(&sdata->skb_queue);
450 INIT_WORK(&sdata->work, ieee80211_iface_work);
451
8b305780 452 return 0;
4b6f1dd6
JB		 453}
454
3c3e21e7 455void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 456{
457 struct ieee80211_sub_if_data *sdata;
458
30686bf7 459 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 460 return;
461
8b305780
JB		 462 ASSERT_RTNL();
463
685fb72b 464 mutex_lock(&local->iflist_mtx);
4b6f1dd6 465
685fb72b
JB		 466 sdata = rcu_dereference_protected(local->monitor_sdata,
467 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 468 if (!sdata) {
469 mutex_unlock(&local->iflist_mtx);
470 return;
471 }
4b6f1dd6 472
0c2bef46 473 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 474 mutex_unlock(&local->iflist_mtx);
475
4b6f1dd6
JB		 476 synchronize_net();
477
34a3740d 478 mutex_lock(&local->mtx);
55de908a 479 ieee80211_vif_release_channel(sdata);
34a3740d 480 mutex_unlock(&local->mtx);
55de908a 481
4b6f1dd6
JB		 482 drv_remove_interface(local, sdata);
483
484 kfree(sdata);
485}
486
34d4bc4d
JB		 487/*
488 * NOTE: Be very careful when changing this function, it must NOT return
489 * an error on interface type changes that have been pre-checked, so most
490 * checks should be in ieee80211_check_concurrent_iface.
491 */
f142c6b9 492int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 493{
f142c6b9
JB		 494 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
495 struct net_device *dev = wdev->netdev;
87490f6d
JB		 496 struct ieee80211_local *local = sdata->local;
497 struct sta_info *sta;
498 u32 changed = 0;
499 int res;
500 u32 hw_reconf_flags = 0;
501
0d143fe1
JB		 502 switch (sdata->vif.type) {
503 case NL80211_IFTYPE_WDS:
504 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
505 return -ENOLINK;
506 break;
665c93a9
JB		 507 case NL80211_IFTYPE_AP_VLAN: {
508 struct ieee80211_sub_if_data *master;
509
0d143fe1
JB		 510 if (!sdata->bss)
511 return -ENOLINK;
665c93a9 512
4e141dad 513 mutex_lock(&local->mtx);
0d143fe1 514 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 515 mutex_unlock(&local->mtx);
665c93a9
JB		 516
517 master = container_of(sdata->bss,
518 struct ieee80211_sub_if_data, u.ap);
519 sdata->control_port_protocol =
520 master->control_port_protocol;
521 sdata->control_port_no_encrypt =
522 master->control_port_no_encrypt;
018f6fbf
DK		 523 sdata->control_port_over_nl80211 =
524 master->control_port_over_nl80211;
1351c5d3
JB		 525 sdata->vif.cab_queue = master->vif.cab_queue;
526 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
527 sizeof(sdata->vif.hw_queue));
2967e031 528 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 529
530 mutex_lock(&local->key_mtx);
531 sdata->crypto_tx_tailroom_needed_cnt +=
532 master->crypto_tx_tailroom_needed_cnt;
533 mutex_unlock(&local->key_mtx);
534
0d143fe1 535 break;
665c93a9 536 }
0d143fe1
JB		 537 case NL80211_IFTYPE_AP:
538 sdata->bss = &sdata->u.ap;
539 break;
540 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 541 case NL80211_IFTYPE_STATION:
542 case NL80211_IFTYPE_MONITOR:
543 case NL80211_IFTYPE_ADHOC:
f142c6b9 544 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 545 case NL80211_IFTYPE_OCB:
cb3b7d87 546 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 547 /* no special treatment */
548 break;
549 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 550 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 551 case NL80211_IFTYPE_P2P_CLIENT:
552 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 553 /* cannot happen */
554 WARN_ON(1);
555 break;
556 }
557
558 if (local->open_count == 0) {
24487981 559 res = drv_start(local);
0d143fe1
JB		 560 if (res)
561 goto err_del_bss;
e8975581
JB		 562 /* we're brought up, everything changes */
563 hw_reconf_flags = ~0;
1f87f7d3 564 ieee80211_led_radio(local, true);
67408c8c
JB		 565 ieee80211_mod_tpt_led_trig(local,
566 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 567 }
568
569 /*
bf533e0b
JB		 570 * Copy the hopefully now-present MAC address to
571 * this interface, if it has the special null one.
0d143fe1 572 */
f142c6b9 573 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 574 memcpy(dev->dev_addr,
575 local->hw.wiphy->perm_addr,
576 ETH_ALEN);
577 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
578
579 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 580 res = -EADDRNOTAVAIL;
581 goto err_stop;
0adc23f5 582 }
0d143fe1
JB		 583 }
584
0d143fe1
JB		 585 switch (sdata->vif.type) {
586 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 587 /* no need to tell driver, but set carrier and chanctx */
588 if (rtnl_dereference(sdata->bss->beacon)) {
589 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 590 netif_carrier_on(dev);
4d76d21b 591 } else {
3edaf3e6 592 netif_carrier_off(dev);
4d76d21b 593 }
0d143fe1
JB		 594 break;
595 case NL80211_IFTYPE_MONITOR:
d8212184 596 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 597 local->cooked_mntrs++;
598 break;
599 }
600
d8212184 601 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 602 res = drv_add_interface(local, sdata);
603 if (res)
604 goto err_stop;
605 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 606 res = ieee80211_add_virtual_monitor(local);
607 if (res)
608 goto err_stop;
609 }
610
0d143fe1
JB		 611 /* must be before the call to ieee80211_configure_filter */
612 local->monitors++;
e8975581 613 if (local->monitors == 1) {
0869aea0
JB		 614 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
615 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 616 }
0d143fe1 617
85416a4f 618 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 619 ieee80211_configure_filter(local);
801d929c
FF		 620 mutex_lock(&local->mtx);
621 ieee80211_recalc_idle(local);
622 mutex_unlock(&local->mtx);
53e9b1de
DG		 623
624 netif_carrier_on(dev);
0d143fe1 625 break;
0d143fe1 626 default:
34d4bc4d 627 if (coming_up) {
075e0847
JB		 628 ieee80211_del_virtual_monitor(local);
629
7b7eab6f 630 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 631 if (res)
632 goto err_stop;
a9865538
JB		 633 res = ieee80211_check_queues(sdata,
634 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 635 if (res)
636 goto err_del_interface;
34d4bc4d 637 }
0d143fe1 638
29cbe68c 639 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 640 local->fif_pspoll++;
7be5086d 641 local->fif_probe_req++;
e3b90ca2 642
e3b90ca2 643 ieee80211_configure_filter(local);
7be5086d
JB		 644 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
645 local->fif_probe_req++;
a3c9aa51 646 }
e3b90ca2 647
708d50ed
AB		 648 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
649 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 650 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 651 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 652
c405c629
JB		 653 switch (sdata->vif.type) {
654 case NL80211_IFTYPE_STATION:
655 case NL80211_IFTYPE_ADHOC:
656 case NL80211_IFTYPE_AP:
657 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 658 case NL80211_IFTYPE_OCB:
0d143fe1 659 netif_carrier_off(dev);
c405c629 660 break;
1411af15 661 case NL80211_IFTYPE_WDS:
f142c6b9 662 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 663 case NL80211_IFTYPE_NAN:
1411af15 664 break;
c405c629 665 default:
a2310824
JB		 666 /* not reached */
667 WARN_ON(1);
c405c629 668 }
59034591
EP		 669
670 /*
cec66283 671 * Set default queue parameters so drivers don't
59034591 672 * need to initialise the hardware if the hardware
cec66283
JB		 673 * doesn't start up with sane defaults.
674 * Enable QoS for anything but station interfaces.
59034591 675 */
cec66283
JB		 676 ieee80211_set_wmm_default(sdata, true,
677 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 678 }
679
2d2080c3
JB		 680 set_bit(SDATA_STATE_RUNNING, &sdata->state);
681
f64331d5
JB		 682 switch (sdata->vif.type) {
683 case NL80211_IFTYPE_WDS:
0d143fe1
JB		 684 /* Create STA entry for the WDS peer */
685 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
686 GFP_KERNEL);
687 if (!sta) {
688 res = -ENOMEM;
689 goto err_del_interface;
690 }
691
83d5cc01
JB		 692 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
693 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
694 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 695
696 res = sta_info_insert(sta);
697 if (res) {
698 /* STA has been freed */
699 goto err_del_interface;
700 }
1be7fe8d
BJ		 701
702 rate_control_rate_init(sta);
1411af15 703 netif_carrier_on(dev);
f64331d5
JB		 704 break;
705 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9 706 rcu_assign_pointer(local->p2p_sdata, sdata);
f64331d5
JB		 707 break;
708 case NL80211_IFTYPE_MONITOR:
709 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
710 break;
711 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
712 break;
713 default:
714 break;
0d143fe1
JB		 715 }
716
0d143fe1
JB		 717 /*
718 * set_multicast_list will be invoked by the networking core
719 * which will check whether any increments here were done in
720 * error and sync them down to the hardware as filter flags.
721 */
722 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
723 atomic_inc(&local->iff_allmultis);
724
34d4bc4d
JB		 725 if (coming_up)
726 local->open_count++;
727
59034591 728 if (hw_reconf_flags)
e8975581 729 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 730
4a733ef1 731 ieee80211_recalc_ps(local);
965bedad 732
2b436312 733 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
7d65f829
JB		 734 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
735 local->ops->wake_tx_queue) {
2b436312 736 /* XXX: for AP_VLAN, actually track AP queues */
89e9bfc4
CL		 737 if (dev)
738 netif_tx_start_all_queues(dev);
2b436312 739 } else if (dev) {
2b730daa
JB		 740 unsigned long flags;
741 int n_acs = IEEE80211_NUM_ACS;
742 int ac;
743
744 if (local->hw.queues < IEEE80211_NUM_ACS)
745 n_acs = 1;
746
747 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
748 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
749 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
750 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
751 for (ac = 0; ac < n_acs; ac++) {
752 int ac_queue = sdata->vif.hw_queue[ac];
753
754 if (local->queue_stop_reasons[ac_queue] == 0 &&
755 skb_queue_empty(&local->pending[ac_queue]))
756 netif_start_subqueue(dev, ac);
757 }
758 }
759 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
760 }
0d143fe1
JB		 761
762 return 0;
763 err_del_interface:
7b7eab6f 764 drv_remove_interface(local, sdata);
0d143fe1 765 err_stop:
24487981
JB		 766 if (!local->open_count)
767 drv_stop(local);
0d143fe1
JB		 768 err_del_bss:
769 sdata->bss = NULL;
4e141dad
MK		 770 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
771 mutex_lock(&local->mtx);
0d143fe1 772 list_del(&sdata->u.vlan.list);
4e141dad
MK		 773 mutex_unlock(&local->mtx);
774 }
4d6c36fa 775 /* might already be clear but that doesn't matter */
2d2080c3 776 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 777 return res;
778}
779
34d4bc4d 780static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 781{
782 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 783 int err;
784
785 /* fail early if user set an invalid address */
2fcf2824 786 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 787 return -EADDRNOTAVAIL;
788
789 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
790 if (err)
791 return err;
792
f142c6b9 793 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 794}
795
796static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
797 bool going_down)
798{
0d143fe1 799 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 800 unsigned long flags;
801 struct sk_buff *skb, *tmp;
e8975581 802 u32 hw_reconf_flags = 0;
09f4114e 803 int i, flushed;
397a7a24 804 struct ps_data *ps;
d2859df5 805 struct cfg80211_chan_def chandef;
46238845 806 bool cancel_scan;
167e33f4 807 struct cfg80211_nan_func *func;
0d143fe1 808
c29acf20
RM		 809 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
810
46238845
JB		 811 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
812 if (cancel_scan)
352ffad6
BC		 813 ieee80211_scan_cancel(local);
814
0d143fe1
JB		 815 /*
816 * Stop TX on this interface first.
817 */
f142c6b9
JB		 818 if (sdata->dev)
819 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 820
c8f994ee 821 ieee80211_roc_purge(local, sdata);
af6b6374 822
8ffcc704
EG		 823 switch (sdata->vif.type) {
824 case NL80211_IFTYPE_STATION:
572078be 825 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 826 break;
827 case NL80211_IFTYPE_ADHOC:
cd7760e6 828 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 829 break;
830 case NL80211_IFTYPE_AP:
831 cancel_work_sync(&sdata->u.ap.request_smps_work);
832 break;
f64331d5
JB		 833 case NL80211_IFTYPE_MONITOR:
834 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
835 break;
836 list_del_rcu(&sdata->u.mntr.list);
837 break;
8ffcc704
EG		 838 default:
839 break;
840 }
cd7760e6 841
0d143fe1
JB		 842 /*
843 * Remove all stations associated with this interface.
844 *
845 * This must be done before calling ops->remove_interface()
846 * because otherwise we can later invoke ops->sta_notify()
847 * whenever the STAs are removed, and that invalidates driver
848 * assumptions about always getting a vif pointer that is valid
849 * (because if we remove a STA after ops->remove_interface()
850 * the driver will have removed the vif info already!)
851 *
5eb8f4d7
JB		 852 * In WDS mode a station must exist here and be flushed, for
853 * AP_VLANs stations may exist since there's nothing else that
854 * would have removed them, but in other modes there shouldn't
855 * be any stations.
0d143fe1 856 */
d34ba216 857 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 858 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
859 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
860 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 861
df140465 862 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 863 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
864 atomic_dec(&local->iff_allmultis);
865
7be5086d 866 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 867 local->fif_pspoll--;
7be5086d
JB		 868 local->fif_probe_req--;
869 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
870 local->fif_probe_req--;
871 }
e3b90ca2 872
f142c6b9
JB		 873 if (sdata->dev) {
874 netif_addr_lock_bh(sdata->dev);
875 spin_lock_bh(&local->filter_lock);
876 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
877 sdata->dev->addr_len);
878 spin_unlock_bh(&local->filter_lock);
879 netif_addr_unlock_bh(sdata->dev);
f142c6b9 880 }
3ac64bee 881
7cbf0ba5
VN		 882 del_timer_sync(&local->dynamic_ps_timer);
883 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 884
04ecd257 885 cancel_work_sync(&sdata->recalc_smps);
dbd72850 886 sdata_lock(sdata);
59af6928 887 mutex_lock(&local->mtx);
73da7d5b 888 sdata->vif.csa_active = false;
0c21e632
LC		 889 if (sdata->vif.type == NL80211_IFTYPE_STATION)
890 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 891 if (sdata->csa_block_tx) {
892 ieee80211_wake_vif_queues(local, sdata,
893 IEEE80211_QUEUE_STOP_REASON_CSA);
894 sdata->csa_block_tx = false;
895 }
59af6928 896 mutex_unlock(&local->mtx);
dbd72850 897 sdata_unlock(sdata);
59af6928 898
73da7d5b 899 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 900
164eb02d
SW		 901 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
902
903 if (sdata->wdev.cac_started) {
d2859df5 904 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 905 WARN_ON(local->suspended);
34a3740d 906 mutex_lock(&local->mtx);
164eb02d 907 ieee80211_vif_release_channel(sdata);
34a3740d 908 mutex_unlock(&local->mtx);
d2859df5
JD		 909 cfg80211_cac_event(sdata->dev, &chandef,
910 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 911 GFP_KERNEL);
912 }
913
0d143fe1
JB		 914 /* APs need special treatment */
915 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 916 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 917
918 /* down all dependent devices, that is VLANs */
57c9fff3 919 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 920 u.vlan.list)
921 dev_close(vlan->dev);
922 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 923 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
924 /* remove all packets in parent bc_buf pointing to this dev */
925 ps = &sdata->bss->ps;
926
927 spin_lock_irqsave(&ps->bc_buf.lock, flags);
928 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
929 if (skb->dev == sdata->dev) {
930 __skb_unlink(skb, &ps->bc_buf);
931 local->total_ps_buffered--;
932 ieee80211_free_txskb(&local->hw, skb);
933 }
934 }
935 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 936 }
937
34d4bc4d
JB		 938 if (going_down)
939 local->open_count--;
0d143fe1
JB		 940
941 switch (sdata->vif.type) {
942 case NL80211_IFTYPE_AP_VLAN:
4e141dad 943 mutex_lock(&local->mtx);
0d143fe1 944 list_del(&sdata->u.vlan.list);
4e141dad 945 mutex_unlock(&local->mtx);
0c2bef46 946 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 947 /* see comment in the default case below */
948 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 949 /* no need to tell driver */
950 break;
951 case NL80211_IFTYPE_MONITOR:
d8212184 952 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 953 local->cooked_mntrs--;
954 break;
955 }
956
957 local->monitors--;
e8975581 958 if (local->monitors == 0) {
0869aea0
JB		 959 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
960 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 961 }
0d143fe1 962
85416a4f 963 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 964 break;
167e33f4
AB		 965 case NL80211_IFTYPE_NAN:
966 /* clean all the functions */
967 spin_lock_bh(&sdata->u.nan.func_lock);
968
969 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
970 idr_remove(&sdata->u.nan.function_inst_ids, i);
971 cfg80211_free_nan_func(func);
972 }
973 idr_destroy(&sdata->u.nan.function_inst_ids);
974
975 spin_unlock_bh(&sdata->u.nan.func_lock);
976 break;
f142c6b9
JB		 977 case NL80211_IFTYPE_P2P_DEVICE:
978 /* relies on synchronize_rcu() below */
0c2bef46 979 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 980 /* fall through */
0d143fe1 981 default:
0b7dff4f 982 cancel_work_sync(&sdata->work);
35f20c14
JB		 983 /*
984 * When we get here, the interface is marked down.
7907c7d3 985 * Free the remaining keys, if there are any
10b68487
FF		 986 * (which can happen in AP mode if userspace sets
987 * keys before the interface is operating, and maybe
988 * also in WDS mode)
75de9113 989 *
7907c7d3
JB		 990 * Force the key freeing to always synchronize_net()
991 * to wait for the RX path in case it is using this
10b68487 992 * interface enqueuing frames at this very time on
75de9113 993 * another CPU.
35f20c14 994 */
7907c7d3 995 ieee80211_free_keys(sdata, true);
1861b845 996 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 997 }
998
5061b0c2
JB		 999 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1000 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1001 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1002 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1003 if (info->control.vif == &sdata->vif) {
1004 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 1005 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 1006 }
1007 }
1008 }
1009 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 1010
2a9e2579
JB		 1011 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1012 ieee80211_txq_remove_vlan(local, sdata);
53168215 1013
2a9e2579 1014 sdata->bss = NULL;
ba8c3d6f 1015
b2c0958b
JB		 1016 if (local->open_count == 0)
1017 ieee80211_clear_tx_pending(local);
1018
5c21e810
BG		 1019 sdata->vif.bss_conf.beacon_int = 0;
1020
b2c0958b
JB		 1021 /*
1022 * If the interface goes down while suspended, presumably because
1023 * the device was unplugged and that happens before our resume,
1024 * then the driver is already unconfigured and the remainder of
1025 * this function isn't needed.
1026 * XXX: what about WoWLAN? If the device has software state, e.g.
1027 * memory allocated, it might expect teardown commands from
1028 * mac80211 here?
1029 */
1030 if (local->suspended) {
1031 WARN_ON(local->wowlan);
1032 WARN_ON(rtnl_dereference(local->monitor_sdata));
1033 return;
1034 }
1035
1036 switch (sdata->vif.type) {
1037 case NL80211_IFTYPE_AP_VLAN:
1038 break;
1039 case NL80211_IFTYPE_MONITOR:
1040 if (local->monitors == 0)
1041 ieee80211_del_virtual_monitor(local);
1042
1043 mutex_lock(&local->mtx);
1044 ieee80211_recalc_idle(local);
1045 mutex_unlock(&local->mtx);
31eba5bc 1046
d8212184 1047 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1048 break;
1049
1050 /* fall through */
b2c0958b
JB		 1051 default:
1052 if (going_down)
1053 drv_remove_interface(local, sdata);
1054 }
1055
4a733ef1 1056 ieee80211_recalc_ps(local);
b2c0958b 1057
46238845
JB		 1058 if (cancel_scan)
1059 flush_delayed_work(&local->scan_work);
1060
b2c0958b
JB		 1061 if (local->open_count == 0) {
1062 ieee80211_stop_device(local);
1063
1064 /* no reconfiguring after stop! */
1065 return;
1066 }
1067
1068 /* do after stop to avoid reconfiguring when we stop anyway */
1069 ieee80211_configure_filter(local);
1070 ieee80211_hw_config(local, hw_reconf_flags);
1071
1072 if (local->monitors == local->open_count)
075e0847 1073 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1074}
1075
1076static int ieee80211_stop(struct net_device *dev)
1077{
1078 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1079
1080 ieee80211_do_stop(sdata, true);
5061b0c2 1081
0d143fe1
JB		 1082 return 0;
1083}
1084
1085static void ieee80211_set_multicast_list(struct net_device *dev)
1086{
0d143fe1 1087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1088 struct ieee80211_local *local = sdata->local;
df140465 1089 int allmulti, sdata_allmulti;
0d143fe1
JB		 1090
1091 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1092 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1093
1094 if (allmulti != sdata_allmulti) {
1095 if (dev->flags & IFF_ALLMULTI)
1096 atomic_inc(&local->iff_allmultis);
1097 else
1098 atomic_dec(&local->iff_allmultis);
1099 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1100 }
1101
3b8d81e0 1102 spin_lock_bh(&local->filter_lock);
22bedad3 1103 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1104 spin_unlock_bh(&local->filter_lock);
3ac64bee 1105 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1106}
1107
75636525
JB		 1108/*
1109 * Called when the netdev is removed or, by the code below, before
1110 * the interface type changes.
1111 */
f142c6b9 1112static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1113{
1114 int i;
1115
75636525 1116 /* free extra data */
7907c7d3 1117 ieee80211_free_keys(sdata, false);
75636525 1118
aee14ceb
JM		 1119 ieee80211_debugfs_remove_netdev(sdata);
1120
f0706e82 1121 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1122 __skb_queue_purge(&sdata->fragments[i].skb_list);
1123 sdata->fragment_next = 0;
11a843b7 1124
b9dcf712 1125 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1126 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1127}
1128
f142c6b9
JB		 1129static void ieee80211_uninit(struct net_device *dev)
1130{
1131 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1132}
1133
cf0277e7 1134static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1135 struct sk_buff *skb,
a350ecce 1136 struct net_device *sb_dev)
cf0277e7
JB		 1137{
1138 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1139}
1140
bc1f4470 1141static void
5a490510
JB		 1142ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1143{
1144 int i;
1145
1146 for_each_possible_cpu(i) {
1147 const struct pcpu_sw_netstats *tstats;
1148 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1149 unsigned int start;
1150
1151 tstats = per_cpu_ptr(dev->tstats, i);
1152
1153 do {
1154 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1155 rx_packets = tstats->rx_packets;
1156 tx_packets = tstats->tx_packets;
1157 rx_bytes = tstats->rx_bytes;
1158 tx_bytes = tstats->tx_bytes;
1159 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1160
1161 stats->rx_packets += rx_packets;
1162 stats->tx_packets += tx_packets;
1163 stats->rx_bytes += rx_bytes;
1164 stats->tx_bytes += tx_bytes;
1165 }
5a490510
JB		 1166}
1167
587e729e
JB		 1168static const struct net_device_ops ieee80211_dataif_ops = {
1169 .ndo_open = ieee80211_open,
1170 .ndo_stop = ieee80211_stop,
f142c6b9 1171 .ndo_uninit = ieee80211_uninit,
587e729e 1172 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1173 .ndo_set_rx_mode = ieee80211_set_multicast_list,
47846c9b 1174 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1175 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1176 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1177};
1178
cf0277e7 1179static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1180 struct sk_buff *skb,
a350ecce 1181 struct net_device *sb_dev)
cf0277e7
JB		 1182{
1183 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1184 struct ieee80211_local *local = sdata->local;
1185 struct ieee80211_hdr *hdr;
1186 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1187
32c5057b 1188 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1189 return 0;
1190
1191 if (skb->len < 4 ||
b49bb574 1192 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1193 return 0; /* doesn't matter, frame will be dropped */
1194
b49bb574 1195 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1196
00e96dec 1197 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1198}
1199
587e729e
JB		 1200static const struct net_device_ops ieee80211_monitorif_ops = {
1201 .ndo_open = ieee80211_open,
1202 .ndo_stop = ieee80211_stop,
f142c6b9 1203 .ndo_uninit = ieee80211_uninit,
587e729e 1204 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1205 .ndo_set_rx_mode = ieee80211_set_multicast_list,
31eba5bc 1206 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1207 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1208 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1209};
1210
5a490510
JB		 1211static void ieee80211_if_free(struct net_device *dev)
1212{
1213 free_percpu(dev->tstats);
5a490510
JB		 1214}
1215
587e729e
JB		 1216static void ieee80211_if_setup(struct net_device *dev)
1217{
1218 ether_setup(dev);
550fd08c 1219 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1220 dev->netdev_ops = &ieee80211_dataif_ops;
cf124db5
DM		 1221 dev->needs_free_netdev = true;
1222 dev->priv_destructor = ieee80211_if_free;
587e729e
JB		 1223}
1224
80a83cfc
MK		 1225static void ieee80211_if_setup_no_queue(struct net_device *dev)
1226{
1227 ieee80211_if_setup(dev);
8dbb000e 1228 dev->features |= NETIF_F_LLTX;
80a83cfc
MK		 1229 dev->priv_flags |= IFF_NO_QUEUE;
1230}
1231
1fa57d01
JB		 1232static void ieee80211_iface_work(struct work_struct *work)
1233{
1234 struct ieee80211_sub_if_data *sdata =
1235 container_of(work, struct ieee80211_sub_if_data, work);
1236 struct ieee80211_local *local = sdata->local;
1237 struct sk_buff *skb;
344eec67 1238 struct sta_info *sta;
1fa57d01
JB		 1239
1240 if (!ieee80211_sdata_running(sdata))
1241 return;
1242
fc58c47e 1243 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1244 return;
1245
4afaff17 1246 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1247 return;
1248
1249 /* first process frames */
1250 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1251 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1252
699cb58c
JB		 1253 if (ieee80211_is_action(mgmt->frame_control) &&
1254 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1255 int len = skb->len;
bed7ee6e 1256
a93e3644 1257 mutex_lock(&local->sta_mtx);
875ae5f6 1258 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1259 if (sta) {
1260 switch (mgmt->u.action.u.addba_req.action_code) {
1261 case WLAN_ACTION_ADDBA_REQ:
1262 ieee80211_process_addba_request(
1263 local, sta, mgmt, len);
1264 break;
1265 case WLAN_ACTION_ADDBA_RESP:
1266 ieee80211_process_addba_resp(local, sta,
1267 mgmt, len);
1268 break;
1269 case WLAN_ACTION_DELBA:
1270 ieee80211_process_delba(sdata, sta,
1271 mgmt, len);
1272 break;
1273 default:
1274 WARN_ON(1);
1275 break;
1276 }
1277 }
a93e3644 1278 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1279 } else if (ieee80211_is_action(mgmt->frame_control) &&
1280 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1281 switch (mgmt->u.action.u.vht_group_notif.action_code) {
d2941df8
JB		 1282 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1283 struct ieee80211_rx_status *status;
1284 enum nl80211_band band;
1285 u8 opmode;
1286
1287 status = IEEE80211_SKB_RXCB(skb);
1288 band = status->band;
1289 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1290
1291 mutex_lock(&local->sta_mtx);
1292 sta = sta_info_get_bss(sdata, mgmt->sa);
1293
1294 if (sta)
1295 ieee80211_vht_handle_opmode(sdata, sta,
1296 opmode,
1297 band);
1298
1299 mutex_unlock(&local->sta_mtx);
1300 break;
1301 }
23a1f8d4
SS		 1302 case WLAN_VHT_ACTION_GROUPID_MGMT:
1303 ieee80211_process_mu_groups(sdata, mgmt);
1304 break;
1305 default:
1306 WARN_ON(1);
1307 break;
1308 }
344eec67
JB		 1309 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1310 struct ieee80211_hdr *hdr = (void *)mgmt;
1311 /*
1312 * So the frame isn't mgmt, but frame_control
1313 * is at the right place anyway, of course, so
1314 * the if statement is correct.
1315 *
1316 * Warn if we have other data frame types here,
1317 * they must not get here.
1318 */
1319 WARN_ON(hdr->frame_control &
1320 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1321 WARN_ON(!(hdr->seq_ctrl &
1322 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1323 /*
1324 * This was a fragment of a frame, received while
1325 * a block-ack session was active. That cannot be
1326 * right, so terminate the session.
1327 */
a93e3644 1328 mutex_lock(&local->sta_mtx);
875ae5f6 1329 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67 1330 if (sta) {
a1f2ba04 1331 u16 tid = ieee80211_get_tid(hdr);
344eec67
JB		 1332
1333 __ieee80211_stop_rx_ba_session(
1334 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1335 WLAN_REASON_QSTA_REQUIRE_SETUP,
1336 true);
344eec67 1337 }
a93e3644 1338 mutex_unlock(&local->sta_mtx);
bed7ee6e 1339 } else switch (sdata->vif.type) {
1fa57d01
JB		 1340 case NL80211_IFTYPE_STATION:
1341 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1342 break;
1343 case NL80211_IFTYPE_ADHOC:
1344 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1345 break;
1346 case NL80211_IFTYPE_MESH_POINT:
1347 if (!ieee80211_vif_is_mesh(&sdata->vif))
1348 break;
1349 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1350 break;
1351 default:
1352 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1353 break;
1354 }
36b3a628
JB		 1355
1356 kfree_skb(skb);
1fa57d01
JB		 1357 }
1358
1359 /* then other type-dependent work */
1360 switch (sdata->vif.type) {
1361 case NL80211_IFTYPE_STATION:
1362 ieee80211_sta_work(sdata);
1363 break;
1364 case NL80211_IFTYPE_ADHOC:
1365 ieee80211_ibss_work(sdata);
1366 break;
1367 case NL80211_IFTYPE_MESH_POINT:
1368 if (!ieee80211_vif_is_mesh(&sdata->vif))
1369 break;
1370 ieee80211_mesh_work(sdata);
1371 break;
239281f8
RL		 1372 case NL80211_IFTYPE_OCB:
1373 ieee80211_ocb_work(sdata);
1374 break;
1fa57d01
JB		 1375 default:
1376 break;
1377 }
1378}
1379
04ecd257
JB		 1380static void ieee80211_recalc_smps_work(struct work_struct *work)
1381{
1382 struct ieee80211_sub_if_data *sdata =
1383 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1384
1385 ieee80211_recalc_smps(sdata);
1386}
1fa57d01 1387
75636525
JB		 1388/*
1389 * Helper function to initialise an interface to a specific type.
1390 */
1391static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1392 enum nl80211_iftype type)
f0706e82 1393{
239281f8
RL		 1394 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1395 0xff, 0xff, 0xff};
1396
75636525
JB		 1397 /* clear type-dependent union */
1398 memset(&sdata->u, 0, sizeof(sdata->u));
1399
1400 /* and set some type-dependent values */
1401 sdata->vif.type = type;
2ca27bcf 1402 sdata->vif.p2p = false;
60719ffd 1403 sdata->wdev.iftype = type;
75636525 1404
a621fa4d
JB		 1405 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1406 sdata->control_port_no_encrypt = false;
2475b1cc 1407 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1408 sdata->vif.bss_conf.idle = true;
a621fa4d 1409
b53be792
SW		 1410 sdata->noack_map = 0;
1411
f142c6b9
JB		 1412 /* only monitor/p2p-device differ */
1413 if (sdata->dev) {
1414 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1415 sdata->dev->type = ARPHRD_ETHER;
1416 }
75636525 1417
35f20c14 1418 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1419 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1420 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1421 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1422 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1423 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1424
75636525 1425 switch (type) {
2ca27bcf
JB		 1426 case NL80211_IFTYPE_P2P_GO:
1427 type = NL80211_IFTYPE_AP;
1428 sdata->vif.type = type;
1429 sdata->vif.p2p = true;
1430 /* fall through */
05c914fe 1431 case NL80211_IFTYPE_AP:
d012a605 1432 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1433 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1434 INIT_WORK(&sdata->u.ap.request_smps_work,
1435 ieee80211_request_smps_ap_work);
ad2d223a 1436 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1437 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1438 break;
2ca27bcf
JB		 1439 case NL80211_IFTYPE_P2P_CLIENT:
1440 type = NL80211_IFTYPE_STATION;
1441 sdata->vif.type = type;
1442 sdata->vif.p2p = true;
1443 /* fall through */
05c914fe 1444 case NL80211_IFTYPE_STATION:
ad2d223a 1445 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1446 ieee80211_sta_setup_sdata(sdata);
472dbc45 1447 break;
6e0bd6c3 1448 case NL80211_IFTYPE_OCB:
239281f8
RL		 1449 sdata->vif.bss_conf.bssid = bssid_wildcard;
1450 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1451 break;
46900298 1452 case NL80211_IFTYPE_ADHOC:
ad2d223a 1453 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1454 ieee80211_ibss_setup_sdata(sdata);
1455 break;
05c914fe 1456 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1457 if (ieee80211_vif_is_mesh(&sdata->vif))
1458 ieee80211_mesh_init_sdata(sdata);
1459 break;
05c914fe 1460 case NL80211_IFTYPE_MONITOR:
75636525 1461 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1462 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1463 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1464 MONITOR_FLAG_OTHER_BSS;
1465 break;
05c914fe 1466 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1467 sdata->vif.bss_conf.bssid = NULL;
1468 break;
167e33f4
AB		 1469 case NL80211_IFTYPE_NAN:
1470 idr_init(&sdata->u.nan.function_inst_ids);
1471 spin_lock_init(&sdata->u.nan.func_lock);
1472 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1473 break;
05c914fe 1474 case NL80211_IFTYPE_AP_VLAN:
98104fde 1475 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1476 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1477 break;
05c914fe 1478 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1479 case NUM_NL80211_IFTYPES:
c7976f52 1480 WARN_ON(1);
75636525
JB		 1481 break;
1482 }
1483
1484 ieee80211_debugfs_add_netdev(sdata);
1485}
1486
34d4bc4d
JB		 1487static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1488 enum nl80211_iftype type)
1489{
1490 struct ieee80211_local *local = sdata->local;
1491 int ret, err;
2ca27bcf
JB		 1492 enum nl80211_iftype internal_type = type;
1493 bool p2p = false;
34d4bc4d
JB		 1494
1495 ASSERT_RTNL();
1496
1497 if (!local->ops->change_interface)
1498 return -EBUSY;
1499
1500 switch (sdata->vif.type) {
1501 case NL80211_IFTYPE_AP:
1502 case NL80211_IFTYPE_STATION:
1503 case NL80211_IFTYPE_ADHOC:
239281f8 1504 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1505 /*
1506 * Could maybe also all others here?
1507 * Just not sure how that interacts
1508 * with the RX/config path e.g. for
1509 * mesh.
1510 */
1511 break;
1512 default:
1513 return -EBUSY;
1514 }
1515
1516 switch (type) {
1517 case NL80211_IFTYPE_AP:
1518 case NL80211_IFTYPE_STATION:
1519 case NL80211_IFTYPE_ADHOC:
239281f8 1520 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1521 /*
1522 * Could probably support everything
1523 * but WDS here (WDS do_open can fail
1524 * under memory pressure, which this
1525 * code isn't prepared to handle).
1526 */
1527 break;
2ca27bcf
JB		 1528 case NL80211_IFTYPE_P2P_CLIENT:
1529 p2p = true;
1530 internal_type = NL80211_IFTYPE_STATION;
1531 break;
1532 case NL80211_IFTYPE_P2P_GO:
1533 p2p = true;
1534 internal_type = NL80211_IFTYPE_AP;
1535 break;
34d4bc4d
JB		 1536 default:
1537 return -EBUSY;
1538 }
1539
2ca27bcf 1540 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1541 if (ret)
1542 return ret;
1543
1544 ieee80211_do_stop(sdata, false);
1545
f142c6b9 1546 ieee80211_teardown_sdata(sdata);
34d4bc4d 1547
2ca27bcf 1548 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1549 if (ret)
a9865538 1550 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1551
3a25a8c8
JB		 1552 /*
1553 * Ignore return value here, there's not much we can do since
1554 * the driver changed the interface type internally already.
1555 * The warnings will hopefully make driver authors fix it :-)
1556 */
a9865538 1557 ieee80211_check_queues(sdata, type);
3a25a8c8 1558
34d4bc4d
JB		 1559 ieee80211_setup_sdata(sdata, type);
1560
f142c6b9 1561 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1562 WARN(err, "type change: do_open returned %d", err);
1563
1564 return ret;
1565}
1566
f3947e2d 1567int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1568 enum nl80211_iftype type)
75636525 1569{
34d4bc4d
JB		 1570 int ret;
1571
f3947e2d
JB		 1572 ASSERT_RTNL();
1573
2ca27bcf 1574 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1575 return 0;
1576
34d4bc4d
JB		 1577 if (ieee80211_sdata_running(sdata)) {
1578 ret = ieee80211_runtime_change_iftype(sdata, type);
1579 if (ret)
1580 return ret;
1581 } else {
1582 /* Purge and reset type-dependent state. */
f142c6b9 1583 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1584 ieee80211_setup_sdata(sdata, type);
1585 }
75636525
JB		 1586
1587 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1588 if (type == NL80211_IFTYPE_STATION)
1589 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1590
1591 return 0;
f0706e82
JB		 1592}
1593
fa9029f8 1594static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1595 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1596{
1597 struct ieee80211_sub_if_data *sdata;
1598 u64 mask, start, addr, val, inc;
1599 u8 *m;
1600 u8 tmp_addr[ETH_ALEN];
1601 int i;
1602
1603 /* default ... something at least */
f142c6b9 1604 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1605
1606 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1607 local->hw.wiphy->n_addresses <= 1)
1608 return;
1609
fa9029f8
JB		 1610 mutex_lock(&local->iflist_mtx);
1611
1612 switch (type) {
1613 case NL80211_IFTYPE_MONITOR:
1614 /* doesn't matter */
1615 break;
1616 case NL80211_IFTYPE_WDS:
1617 case NL80211_IFTYPE_AP_VLAN:
1618 /* match up with an AP interface */
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1620 if (sdata->vif.type != NL80211_IFTYPE_AP)
1621 continue;
f142c6b9 1622 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1623 break;
1624 }
1625 /* keep default if no AP interface present */
1626 break;
6d71117a
JB		 1627 case NL80211_IFTYPE_P2P_CLIENT:
1628 case NL80211_IFTYPE_P2P_GO:
30686bf7 1629 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1630 list_for_each_entry(sdata, &local->interfaces, list) {
1631 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1632 continue;
1633 if (!ieee80211_sdata_running(sdata))
1634 continue;
1635 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1636 goto out_unlock;
1637 }
1638 }
02049ce2 1639 /* fall through */
fa9029f8
JB		 1640 default:
1641 /* assign a new address if possible -- try n_addresses first */
1642 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1643 bool used = false;
1644
1645 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1646 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1647 sdata->vif.addr)) {
fa9029f8
JB		 1648 used = true;
1649 break;
1650 }
1651 }
1652
1653 if (!used) {
f142c6b9 1654 memcpy(perm_addr,
fa9029f8
JB		 1655 local->hw.wiphy->addresses[i].addr,
1656 ETH_ALEN);
1657 break;
1658 }
1659 }
1660
1661 /* try mask if available */
1662 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1663 break;
1664
1665 m = local->hw.wiphy->addr_mask;
1666 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1667 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1668 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1669
1670 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1671 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1672 pr_info("not contiguous\n");
fa9029f8
JB		 1673 break;
1674 }
1675
ac20976d
HS		 1676 /*
1677 * Pick address of existing interface in case user changed
1678 * MAC address manually, default to perm_addr.
1679 */
fa9029f8 1680 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1681 list_for_each_entry(sdata, &local->interfaces, list) {
1682 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1683 continue;
1684 m = sdata->vif.addr;
1685 break;
1686 }
fa9029f8
JB		 1687 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1688 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1689 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1690
1691 inc = 1ULL<<__ffs64(mask);
1692 val = (start & mask);
1693 addr = (start & ~mask) | (val & mask);
1694 do {
1695 bool used = false;
1696
1697 tmp_addr[5] = addr >> 0*8;
1698 tmp_addr[4] = addr >> 1*8;
1699 tmp_addr[3] = addr >> 2*8;
1700 tmp_addr[2] = addr >> 3*8;
1701 tmp_addr[1] = addr >> 4*8;
1702 tmp_addr[0] = addr >> 5*8;
1703
1704 val += inc;
1705
1706 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1707 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1708 used = true;
1709 break;
1710 }
1711 }
1712
1713 if (!used) {
f142c6b9 1714 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1715 break;
1716 }
1717 addr = (start & ~mask) | (val & mask);
1718 } while (addr != start);
1719
1720 break;
1721 }
1722
6d71117a 1723 out_unlock:
fa9029f8
JB		 1724 mutex_unlock(&local->iflist_mtx);
1725}
1726
3e122be0 1727int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1728 unsigned char name_assign_type,
84efbb84 1729 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1730 struct vif_params *params)
f0706e82 1731{
f142c6b9 1732 struct net_device *ndev = NULL;
f0706e82 1733 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1734 struct txq_info *txqi;
80a83cfc 1735 void (*if_setup)(struct net_device *dev);
75636525 1736 int ret, i;
ded81f6b 1737 int txqs = 1;
f0706e82
JB		 1738
1739 ASSERT_RTNL();
75636525 1740
708d50ed 1741 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1742 struct wireless_dev *wdev;
1743
1744 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1745 GFP_KERNEL);
1746 if (!sdata)
1747 return -ENOMEM;
1748 wdev = &sdata->wdev;
1749
1750 sdata->dev = NULL;
1751 strlcpy(sdata->name, name, IFNAMSIZ);
1752 ieee80211_assign_perm_addr(local, wdev->address, type);
1753 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1754 } else {
ba8c3d6f
FF		 1755 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1756 sizeof(void *));
1757 int txq_size = 0;
1758
79af1f86
JB		 1759 if (local->ops->wake_tx_queue &&
1760 type != NL80211_IFTYPE_AP_VLAN &&
8105f9b8
FF		 1761 (type != NL80211_IFTYPE_MONITOR ||
1762 (params->flags & MONITOR_FLAG_ACTIVE)))
ba8c3d6f
FF		 1763 txq_size += sizeof(struct txq_info) +
1764 local->hw.txq_data_size;
1765
dbd50a85 1766 if (local->ops->wake_tx_queue) {
80a83cfc 1767 if_setup = ieee80211_if_setup_no_queue;
dbd50a85 1768 } else {
80a83cfc 1769 if_setup = ieee80211_if_setup;
dbd50a85
JB		 1770 if (local->hw.queues >= IEEE80211_NUM_ACS)
1771 txqs = IEEE80211_NUM_ACS;
1772 }
f142c6b9 1773
ba8c3d6f 1774 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1775 name, name_assign_type,
80a83cfc 1776 if_setup, txqs, 1);
f142c6b9
JB		 1777 if (!ndev)
1778 return -ENOMEM;
1779 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1780
5a490510
JB		 1781 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1782 if (!ndev->tstats) {
1783 free_netdev(ndev);
1784 return -ENOMEM;
1785 }
1786
f142c6b9
JB		 1787 ndev->needed_headroom = local->tx_headroom +
1788 4*6 /* four MAC addresses */
1789 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1790 + 6 /* mesh */
1791 + 8 /* rfc1042/bridge tunnel */
1792 - ETH_HLEN /* ethernet hard_header_len */
1793 + IEEE80211_ENCRYPT_HEADROOM;
1794 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1795
1796 ret = dev_alloc_name(ndev, ndev->name);
1797 if (ret < 0) {
e6436be2 1798 ieee80211_if_free(ndev);
c7a61cba 1799 free_netdev(ndev);
f142c6b9
JB		 1800 return ret;
1801 }
1802
1803 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
dd665d23 1804 if (is_valid_ether_addr(params->macaddr))
b5dfae02
BG		 1805 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1806 else
1807 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1808 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1809
1810 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1811 sdata = netdev_priv(ndev);
1812 ndev->ieee80211_ptr = &sdata->wdev;
1813 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1814 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1815
ba8c3d6f
FF		 1816 if (txq_size) {
1817 txqi = netdev_priv(ndev) + size;
fa962b92 1818 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1819 }
1820
f142c6b9
JB		 1821 sdata->dev = ndev;
1822 }
75636525
JB		 1823
1824 /* initialise type-independent data */
f0706e82 1825 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1826 sdata->local = local;
75636525
JB		 1827
1828 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1829 skb_queue_head_init(&sdata->fragments[i].skb_list);
1830
1831 INIT_LIST_HEAD(&sdata->key_list);
1832
164eb02d
SW		 1833 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1834 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1835 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1836 ieee80211_delayed_tailroom_dec);
97f97b1f 1837
57fbcce3 1838 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1839 struct ieee80211_supported_band *sband;
1840 sband = local->hw.wiphy->bands[i];
1841 sdata->rc_rateidx_mask[i] =
1842 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1843 if (sband) {
1844 __le16 cap;
1845 u16 *vht_rate_mask;
1846
19468413
SW		 1847 memcpy(sdata->rc_rateidx_mcs_mask[i],
1848 sband->ht_cap.mcs.rx_mask,
1849 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1850
1851 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1852 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1853 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1854 } else {
19468413
SW		 1855 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1856 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1857 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1858 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1859 }
37eb0b16 1860 }
75636525 1861
3a25a8c8
JB		 1862 ieee80211_set_default_queues(sdata);
1863
1ea6f9c0
JB		 1864 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1865 sdata->user_power_level = local->user_power_level;
1866
2475b1cc
MS		 1867 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1868
75636525
JB		 1869 /* setup type-dependent data */
1870 ieee80211_setup_sdata(sdata, type);
f0706e82 1871
f142c6b9 1872 if (ndev) {
dd665d23
JB		 1873 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1874 if (type == NL80211_IFTYPE_STATION)
1875 sdata->u.mgd.use_4addr = params->use_4addr;
9bc383de 1876
f142c6b9 1877 ndev->features |= local->hw.netdev_features;
72d78728 1878
b7ffbd7e
JB		 1879 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1880
9c22b4a3
JW		 1881 /* MTU range: 256 - 2304 */
1882 ndev->min_mtu = 256;
1883 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1884
f142c6b9
JB		 1885 ret = register_netdevice(ndev);
1886 if (ret) {
cf124db5 1887 free_netdev(ndev);
f142c6b9
JB		 1888 return ret;
1889 }
1890 }
f0706e82 1891
c771c9d8 1892 mutex_lock(&local->iflist_mtx);
79010420 1893 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1894 mutex_unlock(&local->iflist_mtx);
79010420 1895
84efbb84
JB		 1896 if (new_wdev)
1897 *new_wdev = &sdata->wdev;
f0706e82 1898
f0706e82 1899 return 0;
f0706e82
JB		 1900}
1901
f698d856 1902void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1903{
f0706e82 1904 ASSERT_RTNL();
11a843b7 1905
c771c9d8 1906 mutex_lock(&sdata->local->iflist_mtx);
75636525 1907 list_del_rcu(&sdata->list);
c771c9d8
JB		 1908 mutex_unlock(&sdata->local->iflist_mtx);
1909
f1267cf3
BP		 1910 if (sdata->vif.txq)
1911 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1912
75636525 1913 synchronize_rcu();
f142c6b9
JB		 1914
1915 if (sdata->dev) {
1916 unregister_netdevice(sdata->dev);
1917 } else {
1918 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1919 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1920 kfree(sdata);
1921 }
1922}
1923
1924void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1925{
1926 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1927 return;
1928 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1929}
1930
75636525 1931void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1932{
75636525 1933 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1934 LIST_HEAD(unreg_list);
f142c6b9 1935 LIST_HEAD(wdev_list);
f0706e82
JB		 1936
1937 ASSERT_RTNL();
1938
d8d9008c
JB		 1939 /* Before destroying the interfaces, make sure they're all stopped so
1940 * that the hardware is stopped. Otherwise, the driver might still be
1941 * iterating the interfaces during the shutdown, e.g. from a worker
1942 * or from RX processing or similar, and if it does so (using atomic
1943 * iteration) while we're manipulating the list, the iteration will
1944 * crash.
1945 *
1946 * After this, the hardware should be stopped and the driver should
1947 * have stopped all of its activities, so that we can do RCU-unaware
1948 * manipulations of the interface list below.
c8aa22db 1949 */
d8d9008c
JB		 1950 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1951
1952 WARN(local->open_count, "%s: open count remains %d\n",
1953 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1954
a50e5fb8
SS		 1955 ieee80211_txq_teardown_flows(local);
1956
efe117ab 1957 mutex_lock(&local->iflist_mtx);
75636525
JB		 1958 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1959 list_del(&sdata->list);
c771c9d8 1960
f142c6b9
JB		 1961 if (sdata->dev)
1962 unregister_netdevice_queue(sdata->dev, &unreg_list);
1963 else
1964 list_add(&sdata->list, &wdev_list);
f0706e82 1965 }
efe117ab
ED		 1966 mutex_unlock(&local->iflist_mtx);
1967 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1968
1969 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1970 list_del(&sdata->list);
1971 cfg80211_unregister_wdev(&sdata->wdev);
1972 kfree(sdata);
1973 }
f0706e82 1974}
5cff20e6 1975
47846c9b 1976static int netdev_notify(struct notifier_block *nb,
351638e7 1977 unsigned long state, void *ptr)
47846c9b 1978{
351638e7 1979 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1980 struct ieee80211_sub_if_data *sdata;
1981
1982 if (state != NETDEV_CHANGENAME)
8bd811aa 1983 return NOTIFY_DONE;
47846c9b
JB		 1984
1985 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1986 return NOTIFY_DONE;
47846c9b
JB		 1987
1988 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1989 return NOTIFY_DONE;
47846c9b
JB		 1990
1991 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1992 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1993 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1994
1995 return NOTIFY_OK;
47846c9b
JB		 1996}
1997
1998static struct notifier_block mac80211_netdev_notifier = {
1999 .notifier_call = netdev_notify,
2000};
2001
2002int ieee80211_iface_init(void)
2003{
2004 return register_netdevice_notifier(&mac80211_netdev_notifier);
2005}
2006
2007void ieee80211_iface_exit(void)
2008{
2009 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2010}
72f15d53
MB		 2011
2012void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2013{
2014 if (sdata->vif.type == NL80211_IFTYPE_AP)
2015 atomic_inc(&sdata->u.ap.num_mcast_sta);
2016 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2017 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2018}
2019
2020void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2021{
2022 if (sdata->vif.type == NL80211_IFTYPE_AP)
2023 atomic_dec(&sdata->u.ap.num_mcast_sta);
2024 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2025 atomic_dec(&sdata->u.vlan.num_mcast_sta);
2026}
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