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cfg80211: add start / stop NAN commands
[mirror_ubuntu-hirsute-kernel.git] / net / mac80211 / iface.c
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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
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
a9865538 330 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 331 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
332 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
333 IEEE80211_INVAL_HW_QUEUE))
334 return -EINVAL;
335 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
336 n_queues))
337 return -EINVAL;
338 }
3a25a8c8
JB		 339 }
340
a9865538
JB		 341 if ((iftype != NL80211_IFTYPE_AP &&
342 iftype != NL80211_IFTYPE_P2P_GO &&
343 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 344 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 345 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
346 return 0;
347 }
348
349 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
350 return -EINVAL;
351
352 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
353 return -EINVAL;
354
355 return 0;
356}
357
85416a4f
CL		 358void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
359 const int offset)
360{
361 struct ieee80211_local *local = sdata->local;
d8212184 362 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 363
364#define ADJUST(_f, _s) do { \
365 if (flags & MONITOR_FLAG_##_f) \
366 local->fif_##_s += offset; \
367 } while (0)
368
369 ADJUST(FCSFAIL, fcsfail);
370 ADJUST(PLCPFAIL, plcpfail);
371 ADJUST(CONTROL, control);
372 ADJUST(CONTROL, pspoll);
373 ADJUST(OTHER_BSS, other_bss);
374
375#undef ADJUST
376}
377
3a25a8c8
JB		 378static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
379{
380 struct ieee80211_local *local = sdata->local;
381 int i;
382
383 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 384 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 385 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 386 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 387 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 388 else
389 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 390 }
391 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
392}
393
3c3e21e7 394int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 395{
396 struct ieee80211_sub_if_data *sdata;
8b305780 397 int ret;
4b6f1dd6 398
30686bf7 399 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 400 return 0;
401
8b305780 402 ASSERT_RTNL();
685fb72b 403
4b6f1dd6 404 if (local->monitor_sdata)
8b305780 405 return 0;
4b6f1dd6
JB		 406
407 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 408 if (!sdata)
409 return -ENOMEM;
4b6f1dd6
JB		 410
411 /* set up data */
412 sdata->local = local;
413 sdata->vif.type = NL80211_IFTYPE_MONITOR;
414 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
415 wiphy_name(local->hw.wiphy));
34171dc0 416 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 417
2475b1cc
MS		 418 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
419
3a25a8c8
JB		 420 ieee80211_set_default_queues(sdata);
421
4b6f1dd6
JB		 422 ret = drv_add_interface(local, sdata);
423 if (WARN_ON(ret)) {
424 /* ok .. stupid driver, it asked for this! */
425 kfree(sdata);
8b305780 426 return ret;
4b6f1dd6
JB		 427 }
428
a9865538 429 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 430 if (ret) {
431 kfree(sdata);
8b305780 432 return ret;
3a25a8c8
JB		 433 }
434
fab57a6c
JB		 435 mutex_lock(&local->iflist_mtx);
436 rcu_assign_pointer(local->monitor_sdata, sdata);
437 mutex_unlock(&local->iflist_mtx);
438
34a3740d 439 mutex_lock(&local->mtx);
4bf88530 440 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 441 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 442 mutex_unlock(&local->mtx);
55de908a 443 if (ret) {
fab57a6c 444 mutex_lock(&local->iflist_mtx);
0c2bef46 445 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 446 mutex_unlock(&local->iflist_mtx);
447 synchronize_net();
55de908a
JB		 448 drv_remove_interface(local, sdata);
449 kfree(sdata);
8b305780 450 return ret;
55de908a
JB		 451 }
452
42bd20d9
AE		 453 skb_queue_head_init(&sdata->skb_queue);
454 INIT_WORK(&sdata->work, ieee80211_iface_work);
455
8b305780 456 return 0;
4b6f1dd6
JB		 457}
458
3c3e21e7 459void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 460{
461 struct ieee80211_sub_if_data *sdata;
462
30686bf7 463 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 464 return;
465
8b305780
JB		 466 ASSERT_RTNL();
467
685fb72b 468 mutex_lock(&local->iflist_mtx);
4b6f1dd6 469
685fb72b
JB		 470 sdata = rcu_dereference_protected(local->monitor_sdata,
471 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 472 if (!sdata) {
473 mutex_unlock(&local->iflist_mtx);
474 return;
475 }
4b6f1dd6 476
0c2bef46 477 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 478 mutex_unlock(&local->iflist_mtx);
479
4b6f1dd6
JB		 480 synchronize_net();
481
34a3740d 482 mutex_lock(&local->mtx);
55de908a 483 ieee80211_vif_release_channel(sdata);
34a3740d 484 mutex_unlock(&local->mtx);
55de908a 485
4b6f1dd6
JB		 486 drv_remove_interface(local, sdata);
487
488 kfree(sdata);
489}
490
34d4bc4d
JB		 491/*
492 * NOTE: Be very careful when changing this function, it must NOT return
493 * an error on interface type changes that have been pre-checked, so most
494 * checks should be in ieee80211_check_concurrent_iface.
495 */
f142c6b9 496int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 497{
f142c6b9
JB		 498 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
499 struct net_device *dev = wdev->netdev;
87490f6d
JB		 500 struct ieee80211_local *local = sdata->local;
501 struct sta_info *sta;
502 u32 changed = 0;
503 int res;
504 u32 hw_reconf_flags = 0;
505
0d143fe1
JB		 506 switch (sdata->vif.type) {
507 case NL80211_IFTYPE_WDS:
508 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
509 return -ENOLINK;
510 break;
665c93a9
JB		 511 case NL80211_IFTYPE_AP_VLAN: {
512 struct ieee80211_sub_if_data *master;
513
0d143fe1
JB		 514 if (!sdata->bss)
515 return -ENOLINK;
665c93a9 516
4e141dad 517 mutex_lock(&local->mtx);
0d143fe1 518 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 519 mutex_unlock(&local->mtx);
665c93a9
JB		 520
521 master = container_of(sdata->bss,
522 struct ieee80211_sub_if_data, u.ap);
523 sdata->control_port_protocol =
524 master->control_port_protocol;
525 sdata->control_port_no_encrypt =
526 master->control_port_no_encrypt;
1351c5d3
JB		 527 sdata->vif.cab_queue = master->vif.cab_queue;
528 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
529 sizeof(sdata->vif.hw_queue));
2967e031 530 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 531
532 mutex_lock(&local->key_mtx);
533 sdata->crypto_tx_tailroom_needed_cnt +=
534 master->crypto_tx_tailroom_needed_cnt;
535 mutex_unlock(&local->key_mtx);
536
0d143fe1 537 break;
665c93a9 538 }
0d143fe1
JB		 539 case NL80211_IFTYPE_AP:
540 sdata->bss = &sdata->u.ap;
541 break;
542 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 543 case NL80211_IFTYPE_STATION:
544 case NL80211_IFTYPE_MONITOR:
545 case NL80211_IFTYPE_ADHOC:
f142c6b9 546 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 547 case NL80211_IFTYPE_OCB:
cb3b7d87 548 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 549 /* no special treatment */
550 break;
551 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 552 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 553 case NL80211_IFTYPE_P2P_CLIENT:
554 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 555 /* cannot happen */
556 WARN_ON(1);
557 break;
558 }
559
560 if (local->open_count == 0) {
24487981 561 res = drv_start(local);
0d143fe1
JB		 562 if (res)
563 goto err_del_bss;
e8975581
JB		 564 /* we're brought up, everything changes */
565 hw_reconf_flags = ~0;
1f87f7d3 566 ieee80211_led_radio(local, true);
67408c8c
JB		 567 ieee80211_mod_tpt_led_trig(local,
568 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 569 }
570
571 /*
bf533e0b
JB		 572 * Copy the hopefully now-present MAC address to
573 * this interface, if it has the special null one.
0d143fe1 574 */
f142c6b9 575 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 576 memcpy(dev->dev_addr,
577 local->hw.wiphy->perm_addr,
578 ETH_ALEN);
579 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
580
581 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 582 res = -EADDRNOTAVAIL;
583 goto err_stop;
0adc23f5 584 }
0d143fe1
JB		 585 }
586
0d143fe1
JB		 587 switch (sdata->vif.type) {
588 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 589 /* no need to tell driver, but set carrier and chanctx */
590 if (rtnl_dereference(sdata->bss->beacon)) {
591 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 592 netif_carrier_on(dev);
4d76d21b 593 } else {
3edaf3e6 594 netif_carrier_off(dev);
4d76d21b 595 }
0d143fe1
JB		 596 break;
597 case NL80211_IFTYPE_MONITOR:
d8212184 598 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 599 local->cooked_mntrs++;
600 break;
601 }
602
d8212184 603 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 604 res = drv_add_interface(local, sdata);
605 if (res)
606 goto err_stop;
607 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 608 res = ieee80211_add_virtual_monitor(local);
609 if (res)
610 goto err_stop;
611 }
612
0d143fe1
JB		 613 /* must be before the call to ieee80211_configure_filter */
614 local->monitors++;
e8975581 615 if (local->monitors == 1) {
0869aea0
JB		 616 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
617 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 618 }
0d143fe1 619
85416a4f 620 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 621 ieee80211_configure_filter(local);
801d929c
FF		 622 mutex_lock(&local->mtx);
623 ieee80211_recalc_idle(local);
624 mutex_unlock(&local->mtx);
53e9b1de
DG		 625
626 netif_carrier_on(dev);
0d143fe1 627 break;
0d143fe1 628 default:
34d4bc4d 629 if (coming_up) {
075e0847
JB		 630 ieee80211_del_virtual_monitor(local);
631
7b7eab6f 632 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 633 if (res)
634 goto err_stop;
a9865538
JB		 635 res = ieee80211_check_queues(sdata,
636 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 637 if (res)
638 goto err_del_interface;
34d4bc4d 639 }
0d143fe1 640
29cbe68c 641 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 642 local->fif_pspoll++;
7be5086d 643 local->fif_probe_req++;
e3b90ca2 644
e3b90ca2 645 ieee80211_configure_filter(local);
7be5086d
JB		 646 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
647 local->fif_probe_req++;
a3c9aa51 648 }
e3b90ca2 649
f142c6b9
JB		 650 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
651 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 652 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 653
c405c629
JB		 654 switch (sdata->vif.type) {
655 case NL80211_IFTYPE_STATION:
656 case NL80211_IFTYPE_ADHOC:
657 case NL80211_IFTYPE_AP:
658 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 659 case NL80211_IFTYPE_OCB:
0d143fe1 660 netif_carrier_off(dev);
c405c629 661 break;
1411af15 662 case NL80211_IFTYPE_WDS:
f142c6b9 663 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 664 case NL80211_IFTYPE_NAN:
1411af15 665 break;
c405c629 666 default:
a2310824
JB		 667 /* not reached */
668 WARN_ON(1);
c405c629 669 }
59034591
EP		 670
671 /*
cec66283 672 * Set default queue parameters so drivers don't
59034591 673 * need to initialise the hardware if the hardware
cec66283
JB		 674 * doesn't start up with sane defaults.
675 * Enable QoS for anything but station interfaces.
59034591 676 */
cec66283
JB		 677 ieee80211_set_wmm_default(sdata, true,
678 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 679 }
680
2d2080c3
JB		 681 set_bit(SDATA_STATE_RUNNING, &sdata->state);
682
0d143fe1
JB		 683 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
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);
f142c6b9
JB		 704 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
705 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 706 }
707
0d143fe1
JB		 708 /*
709 * set_multicast_list will be invoked by the networking core
710 * which will check whether any increments here were done in
711 * error and sync them down to the hardware as filter flags.
712 */
713 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
714 atomic_inc(&local->iff_allmultis);
715
34d4bc4d
JB		 716 if (coming_up)
717 local->open_count++;
718
59034591 719 if (hw_reconf_flags)
e8975581 720 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 721
4a733ef1 722 ieee80211_recalc_ps(local);
965bedad 723
2b436312
JB		 724 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
725 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
726 /* XXX: for AP_VLAN, actually track AP queues */
727 netif_tx_start_all_queues(dev);
728 } else if (dev) {
2b730daa
JB		 729 unsigned long flags;
730 int n_acs = IEEE80211_NUM_ACS;
731 int ac;
732
733 if (local->hw.queues < IEEE80211_NUM_ACS)
734 n_acs = 1;
735
736 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
737 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
738 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
739 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
740 for (ac = 0; ac < n_acs; ac++) {
741 int ac_queue = sdata->vif.hw_queue[ac];
742
743 if (local->queue_stop_reasons[ac_queue] == 0 &&
744 skb_queue_empty(&local->pending[ac_queue]))
745 netif_start_subqueue(dev, ac);
746 }
747 }
748 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
749 }
0d143fe1
JB		 750
751 return 0;
752 err_del_interface:
7b7eab6f 753 drv_remove_interface(local, sdata);
0d143fe1 754 err_stop:
24487981
JB		 755 if (!local->open_count)
756 drv_stop(local);
0d143fe1
JB		 757 err_del_bss:
758 sdata->bss = NULL;
4e141dad
MK		 759 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
760 mutex_lock(&local->mtx);
0d143fe1 761 list_del(&sdata->u.vlan.list);
4e141dad
MK		 762 mutex_unlock(&local->mtx);
763 }
4d6c36fa 764 /* might already be clear but that doesn't matter */
2d2080c3 765 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 766 return res;
767}
768
34d4bc4d 769static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 770{
771 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 772 int err;
773
774 /* fail early if user set an invalid address */
2fcf2824 775 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 776 return -EADDRNOTAVAIL;
777
778 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
779 if (err)
780 return err;
781
f142c6b9 782 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 783}
784
785static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
786 bool going_down)
787{
0d143fe1 788 struct ieee80211_local *local = sdata->local;
fa962b92 789 struct fq *fq = &local->fq;
5061b0c2
JB		 790 unsigned long flags;
791 struct sk_buff *skb, *tmp;
e8975581 792 u32 hw_reconf_flags = 0;
09f4114e 793 int i, flushed;
397a7a24 794 struct ps_data *ps;
d2859df5 795 struct cfg80211_chan_def chandef;
46238845 796 bool cancel_scan;
0d143fe1 797
c29acf20
RM		 798 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
799
46238845
JB		 800 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
801 if (cancel_scan)
352ffad6
BC		 802 ieee80211_scan_cancel(local);
803
0d143fe1
JB		 804 /*
805 * Stop TX on this interface first.
806 */
f142c6b9
JB		 807 if (sdata->dev)
808 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 809
c8f994ee 810 ieee80211_roc_purge(local, sdata);
af6b6374 811
8ffcc704
EG		 812 switch (sdata->vif.type) {
813 case NL80211_IFTYPE_STATION:
572078be 814 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 815 break;
816 case NL80211_IFTYPE_ADHOC:
cd7760e6 817 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 818 break;
819 case NL80211_IFTYPE_AP:
820 cancel_work_sync(&sdata->u.ap.request_smps_work);
821 break;
822 default:
823 break;
824 }
cd7760e6 825
0d143fe1
JB		 826 /*
827 * Remove all stations associated with this interface.
828 *
829 * This must be done before calling ops->remove_interface()
830 * because otherwise we can later invoke ops->sta_notify()
831 * whenever the STAs are removed, and that invalidates driver
832 * assumptions about always getting a vif pointer that is valid
833 * (because if we remove a STA after ops->remove_interface()
834 * the driver will have removed the vif info already!)
835 *
5eb8f4d7
JB		 836 * In WDS mode a station must exist here and be flushed, for
837 * AP_VLANs stations may exist since there's nothing else that
838 * would have removed them, but in other modes there shouldn't
839 * be any stations.
0d143fe1 840 */
d34ba216 841 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 842 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
843 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
844 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 845
df140465 846 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 847 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
848 atomic_dec(&local->iff_allmultis);
849
7be5086d 850 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 851 local->fif_pspoll--;
7be5086d
JB		 852 local->fif_probe_req--;
853 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
854 local->fif_probe_req--;
855 }
e3b90ca2 856
f142c6b9
JB		 857 if (sdata->dev) {
858 netif_addr_lock_bh(sdata->dev);
859 spin_lock_bh(&local->filter_lock);
860 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
861 sdata->dev->addr_len);
862 spin_unlock_bh(&local->filter_lock);
863 netif_addr_unlock_bh(sdata->dev);
f142c6b9 864 }
3ac64bee 865
7cbf0ba5
VN		 866 del_timer_sync(&local->dynamic_ps_timer);
867 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 868
04ecd257 869 cancel_work_sync(&sdata->recalc_smps);
dbd72850 870 sdata_lock(sdata);
59af6928 871 mutex_lock(&local->mtx);
73da7d5b 872 sdata->vif.csa_active = false;
0c21e632
LC		 873 if (sdata->vif.type == NL80211_IFTYPE_STATION)
874 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 875 if (sdata->csa_block_tx) {
876 ieee80211_wake_vif_queues(local, sdata,
877 IEEE80211_QUEUE_STOP_REASON_CSA);
878 sdata->csa_block_tx = false;
879 }
59af6928 880 mutex_unlock(&local->mtx);
dbd72850 881 sdata_unlock(sdata);
59af6928 882
73da7d5b 883 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 884
164eb02d
SW		 885 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
886
887 if (sdata->wdev.cac_started) {
d2859df5 888 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 889 WARN_ON(local->suspended);
34a3740d 890 mutex_lock(&local->mtx);
164eb02d 891 ieee80211_vif_release_channel(sdata);
34a3740d 892 mutex_unlock(&local->mtx);
d2859df5
JD		 893 cfg80211_cac_event(sdata->dev, &chandef,
894 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 895 GFP_KERNEL);
896 }
897
0d143fe1
JB		 898 /* APs need special treatment */
899 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 900 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 901
902 /* down all dependent devices, that is VLANs */
57c9fff3 903 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 904 u.vlan.list)
905 dev_close(vlan->dev);
906 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 907 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
908 /* remove all packets in parent bc_buf pointing to this dev */
909 ps = &sdata->bss->ps;
910
911 spin_lock_irqsave(&ps->bc_buf.lock, flags);
912 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
913 if (skb->dev == sdata->dev) {
914 __skb_unlink(skb, &ps->bc_buf);
915 local->total_ps_buffered--;
916 ieee80211_free_txskb(&local->hw, skb);
917 }
918 }
919 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 920 }
921
34d4bc4d
JB		 922 if (going_down)
923 local->open_count--;
0d143fe1
JB		 924
925 switch (sdata->vif.type) {
926 case NL80211_IFTYPE_AP_VLAN:
4e141dad 927 mutex_lock(&local->mtx);
0d143fe1 928 list_del(&sdata->u.vlan.list);
4e141dad 929 mutex_unlock(&local->mtx);
0c2bef46 930 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 931 /* see comment in the default case below */
932 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 933 /* no need to tell driver */
934 break;
935 case NL80211_IFTYPE_MONITOR:
d8212184 936 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 937 local->cooked_mntrs--;
938 break;
939 }
940
941 local->monitors--;
e8975581 942 if (local->monitors == 0) {
0869aea0
JB		 943 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
944 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 945 }
0d143fe1 946
85416a4f 947 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 948 break;
f142c6b9
JB		 949 case NL80211_IFTYPE_P2P_DEVICE:
950 /* relies on synchronize_rcu() below */
0c2bef46 951 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 952 /* fall through */
cb3b7d87 953 case NL80211_IFTYPE_NAN:
0d143fe1 954 default:
0b7dff4f 955 cancel_work_sync(&sdata->work);
35f20c14
JB		 956 /*
957 * When we get here, the interface is marked down.
7907c7d3 958 * Free the remaining keys, if there are any
10b68487
FF		 959 * (which can happen in AP mode if userspace sets
960 * keys before the interface is operating, and maybe
961 * also in WDS mode)
75de9113 962 *
7907c7d3
JB		 963 * Force the key freeing to always synchronize_net()
964 * to wait for the RX path in case it is using this
10b68487 965 * interface enqueuing frames at this very time on
75de9113 966 * another CPU.
35f20c14 967 */
7907c7d3 968 ieee80211_free_keys(sdata, true);
1861b845 969 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 970 }
971
972 sdata->bss = NULL;
973
5061b0c2
JB		 974 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
975 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
976 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
977 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
978 if (info->control.vif == &sdata->vif) {
979 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 980 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 981 }
982 }
983 }
984 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 985
ba8c3d6f
FF		 986 if (sdata->vif.txq) {
987 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
988
fa962b92
MK		 989 spin_lock_bh(&fq->lock);
990 ieee80211_txq_purge(local, txqi);
991 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 992 }
993
b2c0958b
JB		 994 if (local->open_count == 0)
995 ieee80211_clear_tx_pending(local);
996
997 /*
998 * If the interface goes down while suspended, presumably because
999 * the device was unplugged and that happens before our resume,
1000 * then the driver is already unconfigured and the remainder of
1001 * this function isn't needed.
1002 * XXX: what about WoWLAN? If the device has software state, e.g.
1003 * memory allocated, it might expect teardown commands from
1004 * mac80211 here?
1005 */
1006 if (local->suspended) {
1007 WARN_ON(local->wowlan);
1008 WARN_ON(rtnl_dereference(local->monitor_sdata));
1009 return;
1010 }
1011
1012 switch (sdata->vif.type) {
1013 case NL80211_IFTYPE_AP_VLAN:
1014 break;
1015 case NL80211_IFTYPE_MONITOR:
1016 if (local->monitors == 0)
1017 ieee80211_del_virtual_monitor(local);
1018
1019 mutex_lock(&local->mtx);
1020 ieee80211_recalc_idle(local);
1021 mutex_unlock(&local->mtx);
31eba5bc 1022
d8212184 1023 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1024 break;
1025
1026 /* fall through */
b2c0958b
JB		 1027 default:
1028 if (going_down)
1029 drv_remove_interface(local, sdata);
1030 }
1031
4a733ef1 1032 ieee80211_recalc_ps(local);
b2c0958b 1033
46238845
JB		 1034 if (cancel_scan)
1035 flush_delayed_work(&local->scan_work);
1036
b2c0958b
JB		 1037 if (local->open_count == 0) {
1038 ieee80211_stop_device(local);
1039
1040 /* no reconfiguring after stop! */
1041 return;
1042 }
1043
1044 /* do after stop to avoid reconfiguring when we stop anyway */
1045 ieee80211_configure_filter(local);
1046 ieee80211_hw_config(local, hw_reconf_flags);
1047
1048 if (local->monitors == local->open_count)
075e0847 1049 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1050}
1051
1052static int ieee80211_stop(struct net_device *dev)
1053{
1054 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1055
1056 ieee80211_do_stop(sdata, true);
5061b0c2 1057
0d143fe1
JB		 1058 return 0;
1059}
1060
1061static void ieee80211_set_multicast_list(struct net_device *dev)
1062{
0d143fe1 1063 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1064 struct ieee80211_local *local = sdata->local;
df140465 1065 int allmulti, sdata_allmulti;
0d143fe1
JB		 1066
1067 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1068 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1069
1070 if (allmulti != sdata_allmulti) {
1071 if (dev->flags & IFF_ALLMULTI)
1072 atomic_inc(&local->iff_allmultis);
1073 else
1074 atomic_dec(&local->iff_allmultis);
1075 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1076 }
1077
3b8d81e0 1078 spin_lock_bh(&local->filter_lock);
22bedad3 1079 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1080 spin_unlock_bh(&local->filter_lock);
3ac64bee 1081 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1082}
1083
75636525
JB		 1084/*
1085 * Called when the netdev is removed or, by the code below, before
1086 * the interface type changes.
1087 */
f142c6b9 1088static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1089{
1090 int i;
1091
75636525 1092 /* free extra data */
7907c7d3 1093 ieee80211_free_keys(sdata, false);
75636525 1094
aee14ceb
JM		 1095 ieee80211_debugfs_remove_netdev(sdata);
1096
f0706e82 1097 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1098 __skb_queue_purge(&sdata->fragments[i].skb_list);
1099 sdata->fragment_next = 0;
11a843b7 1100
b9dcf712 1101 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1102 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1103}
1104
f142c6b9
JB		 1105static void ieee80211_uninit(struct net_device *dev)
1106{
1107 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1108}
1109
cf0277e7 1110static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1111 struct sk_buff *skb,
99932d4f
DB		 1112 void *accel_priv,
1113 select_queue_fallback_t fallback)
cf0277e7
JB		 1114{
1115 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1116}
1117
5a490510
JB		 1118static struct rtnl_link_stats64 *
1119ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1120{
1121 int i;
1122
1123 for_each_possible_cpu(i) {
1124 const struct pcpu_sw_netstats *tstats;
1125 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1126 unsigned int start;
1127
1128 tstats = per_cpu_ptr(dev->tstats, i);
1129
1130 do {
1131 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1132 rx_packets = tstats->rx_packets;
1133 tx_packets = tstats->tx_packets;
1134 rx_bytes = tstats->rx_bytes;
1135 tx_bytes = tstats->tx_bytes;
1136 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1137
1138 stats->rx_packets += rx_packets;
1139 stats->tx_packets += tx_packets;
1140 stats->rx_bytes += rx_bytes;
1141 stats->tx_bytes += tx_bytes;
1142 }
1143
1144 return stats;
1145}
1146
587e729e
JB		 1147static const struct net_device_ops ieee80211_dataif_ops = {
1148 .ndo_open = ieee80211_open,
1149 .ndo_stop = ieee80211_stop,
f142c6b9 1150 .ndo_uninit = ieee80211_uninit,
587e729e 1151 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1152 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1153 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1154 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1155 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1156 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1157};
1158
cf0277e7 1159static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1160 struct sk_buff *skb,
99932d4f
DB		 1161 void *accel_priv,
1162 select_queue_fallback_t fallback)
cf0277e7
JB		 1163{
1164 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1165 struct ieee80211_local *local = sdata->local;
1166 struct ieee80211_hdr *hdr;
1167 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1168
32c5057b 1169 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1170 return 0;
1171
1172 if (skb->len < 4 ||
b49bb574 1173 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1174 return 0; /* doesn't matter, frame will be dropped */
1175
b49bb574 1176 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1177
00e96dec 1178 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1179}
1180
587e729e
JB		 1181static const struct net_device_ops ieee80211_monitorif_ops = {
1182 .ndo_open = ieee80211_open,
1183 .ndo_stop = ieee80211_stop,
f142c6b9 1184 .ndo_uninit = ieee80211_uninit,
587e729e 1185 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1186 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1187 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1188 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1189 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1190 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1191};
1192
5a490510
JB		 1193static void ieee80211_if_free(struct net_device *dev)
1194{
1195 free_percpu(dev->tstats);
1196 free_netdev(dev);
1197}
1198
587e729e
JB		 1199static void ieee80211_if_setup(struct net_device *dev)
1200{
1201 ether_setup(dev);
550fd08c 1202 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1203 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1204 dev->destructor = ieee80211_if_free;
587e729e
JB		 1205}
1206
80a83cfc
MK		 1207static void ieee80211_if_setup_no_queue(struct net_device *dev)
1208{
1209 ieee80211_if_setup(dev);
1210 dev->priv_flags |= IFF_NO_QUEUE;
1211}
1212
1fa57d01
JB		 1213static void ieee80211_iface_work(struct work_struct *work)
1214{
1215 struct ieee80211_sub_if_data *sdata =
1216 container_of(work, struct ieee80211_sub_if_data, work);
1217 struct ieee80211_local *local = sdata->local;
1218 struct sk_buff *skb;
344eec67 1219 struct sta_info *sta;
c1475ca9 1220 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1221 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1222
1223 if (!ieee80211_sdata_running(sdata))
1224 return;
1225
fc58c47e 1226 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1227 return;
1228
4afaff17 1229 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1230 return;
1231
1232 /* first process frames */
1233 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1234 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1235
c1475ca9
JB		 1236 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1237 ra_tid = (void *)&skb->cb;
1238 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1239 ra_tid->tid);
1240 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1241 ra_tid = (void *)&skb->cb;
1242 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1243 ra_tid->tid);
08cf42e8
MK		 1244 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1245 rx_agg = (void *)&skb->cb;
1246 mutex_lock(&local->sta_mtx);
1247 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1248 if (sta)
08cf42e8 1249 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1250 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1251 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1252 false, true);
08cf42e8
MK		 1253 mutex_unlock(&local->sta_mtx);
1254 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1255 rx_agg = (void *)&skb->cb;
1256 mutex_lock(&local->sta_mtx);
1257 sta = sta_info_get_bss(sdata, rx_agg->addr);
1258 if (sta)
1259 __ieee80211_stop_rx_ba_session(sta,
1260 rx_agg->tid,
1261 WLAN_BACK_RECIPIENT, 0,
1262 false);
1263 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1264 } else if (ieee80211_is_action(mgmt->frame_control) &&
1265 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1266 int len = skb->len;
bed7ee6e 1267
a93e3644 1268 mutex_lock(&local->sta_mtx);
875ae5f6 1269 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1270 if (sta) {
1271 switch (mgmt->u.action.u.addba_req.action_code) {
1272 case WLAN_ACTION_ADDBA_REQ:
1273 ieee80211_process_addba_request(
1274 local, sta, mgmt, len);
1275 break;
1276 case WLAN_ACTION_ADDBA_RESP:
1277 ieee80211_process_addba_resp(local, sta,
1278 mgmt, len);
1279 break;
1280 case WLAN_ACTION_DELBA:
1281 ieee80211_process_delba(sdata, sta,
1282 mgmt, len);
1283 break;
1284 default:
1285 WARN_ON(1);
1286 break;
1287 }
1288 }
a93e3644 1289 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1290 } else if (ieee80211_is_action(mgmt->frame_control) &&
1291 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1292 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1293 case WLAN_VHT_ACTION_GROUPID_MGMT:
1294 ieee80211_process_mu_groups(sdata, mgmt);
1295 break;
1296 default:
1297 WARN_ON(1);
1298 break;
1299 }
344eec67
JB		 1300 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1301 struct ieee80211_hdr *hdr = (void *)mgmt;
1302 /*
1303 * So the frame isn't mgmt, but frame_control
1304 * is at the right place anyway, of course, so
1305 * the if statement is correct.
1306 *
1307 * Warn if we have other data frame types here,
1308 * they must not get here.
1309 */
1310 WARN_ON(hdr->frame_control &
1311 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1312 WARN_ON(!(hdr->seq_ctrl &
1313 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1314 /*
1315 * This was a fragment of a frame, received while
1316 * a block-ack session was active. That cannot be
1317 * right, so terminate the session.
1318 */
a93e3644 1319 mutex_lock(&local->sta_mtx);
875ae5f6 1320 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1321 if (sta) {
1322 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1323 IEEE80211_QOS_CTL_TID_MASK;
1324
1325 __ieee80211_stop_rx_ba_session(
1326 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1327 WLAN_REASON_QSTA_REQUIRE_SETUP,
1328 true);
344eec67 1329 }
a93e3644 1330 mutex_unlock(&local->sta_mtx);
bed7ee6e 1331 } else switch (sdata->vif.type) {
1fa57d01
JB		 1332 case NL80211_IFTYPE_STATION:
1333 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1334 break;
1335 case NL80211_IFTYPE_ADHOC:
1336 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1337 break;
1338 case NL80211_IFTYPE_MESH_POINT:
1339 if (!ieee80211_vif_is_mesh(&sdata->vif))
1340 break;
1341 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1342 break;
1343 default:
1344 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1345 break;
1346 }
36b3a628
JB		 1347
1348 kfree_skb(skb);
1fa57d01
JB		 1349 }
1350
1351 /* then other type-dependent work */
1352 switch (sdata->vif.type) {
1353 case NL80211_IFTYPE_STATION:
1354 ieee80211_sta_work(sdata);
1355 break;
1356 case NL80211_IFTYPE_ADHOC:
1357 ieee80211_ibss_work(sdata);
1358 break;
1359 case NL80211_IFTYPE_MESH_POINT:
1360 if (!ieee80211_vif_is_mesh(&sdata->vif))
1361 break;
1362 ieee80211_mesh_work(sdata);
1363 break;
239281f8
RL		 1364 case NL80211_IFTYPE_OCB:
1365 ieee80211_ocb_work(sdata);
1366 break;
1fa57d01
JB		 1367 default:
1368 break;
1369 }
1370}
1371
04ecd257
JB		 1372static void ieee80211_recalc_smps_work(struct work_struct *work)
1373{
1374 struct ieee80211_sub_if_data *sdata =
1375 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1376
1377 ieee80211_recalc_smps(sdata);
1378}
1fa57d01 1379
75636525
JB		 1380/*
1381 * Helper function to initialise an interface to a specific type.
1382 */
1383static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1384 enum nl80211_iftype type)
f0706e82 1385{
239281f8
RL		 1386 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1387 0xff, 0xff, 0xff};
1388
75636525
JB		 1389 /* clear type-dependent union */
1390 memset(&sdata->u, 0, sizeof(sdata->u));
1391
1392 /* and set some type-dependent values */
1393 sdata->vif.type = type;
2ca27bcf 1394 sdata->vif.p2p = false;
60719ffd 1395 sdata->wdev.iftype = type;
75636525 1396
a621fa4d
JB		 1397 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1398 sdata->control_port_no_encrypt = false;
2475b1cc 1399 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1400 sdata->vif.bss_conf.idle = true;
a621fa4d 1401
b53be792
SW		 1402 sdata->noack_map = 0;
1403
f142c6b9
JB		 1404 /* only monitor/p2p-device differ */
1405 if (sdata->dev) {
1406 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1407 sdata->dev->type = ARPHRD_ETHER;
1408 }
75636525 1409
35f20c14 1410 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1411 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1412 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1413 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1414 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1415 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1416
75636525 1417 switch (type) {
2ca27bcf
JB		 1418 case NL80211_IFTYPE_P2P_GO:
1419 type = NL80211_IFTYPE_AP;
1420 sdata->vif.type = type;
1421 sdata->vif.p2p = true;
1422 /* fall through */
05c914fe 1423 case NL80211_IFTYPE_AP:
d012a605 1424 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1425 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1426 INIT_WORK(&sdata->u.ap.request_smps_work,
1427 ieee80211_request_smps_ap_work);
ad2d223a 1428 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1429 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1430 break;
2ca27bcf
JB		 1431 case NL80211_IFTYPE_P2P_CLIENT:
1432 type = NL80211_IFTYPE_STATION;
1433 sdata->vif.type = type;
1434 sdata->vif.p2p = true;
1435 /* fall through */
05c914fe 1436 case NL80211_IFTYPE_STATION:
ad2d223a 1437 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1438 ieee80211_sta_setup_sdata(sdata);
472dbc45 1439 break;
6e0bd6c3 1440 case NL80211_IFTYPE_OCB:
239281f8
RL		 1441 sdata->vif.bss_conf.bssid = bssid_wildcard;
1442 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1443 break;
46900298 1444 case NL80211_IFTYPE_ADHOC:
ad2d223a 1445 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1446 ieee80211_ibss_setup_sdata(sdata);
1447 break;
05c914fe 1448 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1449 if (ieee80211_vif_is_mesh(&sdata->vif))
1450 ieee80211_mesh_init_sdata(sdata);
1451 break;
05c914fe 1452 case NL80211_IFTYPE_MONITOR:
75636525 1453 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1454 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1455 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1456 MONITOR_FLAG_OTHER_BSS;
1457 break;
05c914fe 1458 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1459 sdata->vif.bss_conf.bssid = NULL;
1460 break;
05c914fe 1461 case NL80211_IFTYPE_AP_VLAN:
98104fde 1462 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 1463 case NL80211_IFTYPE_NAN:
ad2d223a 1464 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1465 break;
05c914fe 1466 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1467 case NUM_NL80211_IFTYPES:
75636525
JB		 1468 BUG();
1469 break;
1470 }
1471
1472 ieee80211_debugfs_add_netdev(sdata);
1473}
1474
34d4bc4d
JB		 1475static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1476 enum nl80211_iftype type)
1477{
1478 struct ieee80211_local *local = sdata->local;
1479 int ret, err;
2ca27bcf
JB		 1480 enum nl80211_iftype internal_type = type;
1481 bool p2p = false;
34d4bc4d
JB		 1482
1483 ASSERT_RTNL();
1484
1485 if (!local->ops->change_interface)
1486 return -EBUSY;
1487
1488 switch (sdata->vif.type) {
1489 case NL80211_IFTYPE_AP:
1490 case NL80211_IFTYPE_STATION:
1491 case NL80211_IFTYPE_ADHOC:
239281f8 1492 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1493 /*
1494 * Could maybe also all others here?
1495 * Just not sure how that interacts
1496 * with the RX/config path e.g. for
1497 * mesh.
1498 */
1499 break;
1500 default:
1501 return -EBUSY;
1502 }
1503
1504 switch (type) {
1505 case NL80211_IFTYPE_AP:
1506 case NL80211_IFTYPE_STATION:
1507 case NL80211_IFTYPE_ADHOC:
239281f8 1508 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1509 /*
1510 * Could probably support everything
1511 * but WDS here (WDS do_open can fail
1512 * under memory pressure, which this
1513 * code isn't prepared to handle).
1514 */
1515 break;
2ca27bcf
JB		 1516 case NL80211_IFTYPE_P2P_CLIENT:
1517 p2p = true;
1518 internal_type = NL80211_IFTYPE_STATION;
1519 break;
1520 case NL80211_IFTYPE_P2P_GO:
1521 p2p = true;
1522 internal_type = NL80211_IFTYPE_AP;
1523 break;
34d4bc4d
JB		 1524 default:
1525 return -EBUSY;
1526 }
1527
2ca27bcf 1528 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1529 if (ret)
1530 return ret;
1531
1532 ieee80211_do_stop(sdata, false);
1533
f142c6b9 1534 ieee80211_teardown_sdata(sdata);
34d4bc4d 1535
2ca27bcf 1536 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1537 if (ret)
a9865538 1538 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1539
3a25a8c8
JB		 1540 /*
1541 * Ignore return value here, there's not much we can do since
1542 * the driver changed the interface type internally already.
1543 * The warnings will hopefully make driver authors fix it :-)
1544 */
a9865538 1545 ieee80211_check_queues(sdata, type);
3a25a8c8 1546
34d4bc4d
JB		 1547 ieee80211_setup_sdata(sdata, type);
1548
f142c6b9 1549 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1550 WARN(err, "type change: do_open returned %d", err);
1551
1552 return ret;
1553}
1554
f3947e2d 1555int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1556 enum nl80211_iftype type)
75636525 1557{
34d4bc4d
JB		 1558 int ret;
1559
f3947e2d
JB		 1560 ASSERT_RTNL();
1561
2ca27bcf 1562 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1563 return 0;
1564
34d4bc4d
JB		 1565 if (ieee80211_sdata_running(sdata)) {
1566 ret = ieee80211_runtime_change_iftype(sdata, type);
1567 if (ret)
1568 return ret;
1569 } else {
1570 /* Purge and reset type-dependent state. */
f142c6b9 1571 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1572 ieee80211_setup_sdata(sdata, type);
1573 }
75636525
JB		 1574
1575 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1576 if (type == NL80211_IFTYPE_STATION)
1577 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1578
1579 return 0;
f0706e82
JB		 1580}
1581
fa9029f8 1582static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1583 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1584{
1585 struct ieee80211_sub_if_data *sdata;
1586 u64 mask, start, addr, val, inc;
1587 u8 *m;
1588 u8 tmp_addr[ETH_ALEN];
1589 int i;
1590
1591 /* default ... something at least */
f142c6b9 1592 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1593
1594 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1595 local->hw.wiphy->n_addresses <= 1)
1596 return;
1597
fa9029f8
JB		 1598 mutex_lock(&local->iflist_mtx);
1599
1600 switch (type) {
1601 case NL80211_IFTYPE_MONITOR:
1602 /* doesn't matter */
1603 break;
1604 case NL80211_IFTYPE_WDS:
1605 case NL80211_IFTYPE_AP_VLAN:
1606 /* match up with an AP interface */
1607 list_for_each_entry(sdata, &local->interfaces, list) {
1608 if (sdata->vif.type != NL80211_IFTYPE_AP)
1609 continue;
f142c6b9 1610 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1611 break;
1612 }
1613 /* keep default if no AP interface present */
1614 break;
6d71117a
JB		 1615 case NL80211_IFTYPE_P2P_CLIENT:
1616 case NL80211_IFTYPE_P2P_GO:
30686bf7 1617 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1618 list_for_each_entry(sdata, &local->interfaces, list) {
1619 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1620 continue;
1621 if (!ieee80211_sdata_running(sdata))
1622 continue;
1623 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1624 goto out_unlock;
1625 }
1626 }
1627 /* otherwise fall through */
fa9029f8
JB		 1628 default:
1629 /* assign a new address if possible -- try n_addresses first */
1630 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1631 bool used = false;
1632
1633 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1634 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1635 sdata->vif.addr)) {
fa9029f8
JB		 1636 used = true;
1637 break;
1638 }
1639 }
1640
1641 if (!used) {
f142c6b9 1642 memcpy(perm_addr,
fa9029f8
JB		 1643 local->hw.wiphy->addresses[i].addr,
1644 ETH_ALEN);
1645 break;
1646 }
1647 }
1648
1649 /* try mask if available */
1650 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1651 break;
1652
1653 m = local->hw.wiphy->addr_mask;
1654 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1655 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1656 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1657
1658 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1659 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1660 pr_info("not contiguous\n");
fa9029f8
JB		 1661 break;
1662 }
1663
ac20976d
HS		 1664 /*
1665 * Pick address of existing interface in case user changed
1666 * MAC address manually, default to perm_addr.
1667 */
fa9029f8 1668 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1669 list_for_each_entry(sdata, &local->interfaces, list) {
1670 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1671 continue;
1672 m = sdata->vif.addr;
1673 break;
1674 }
fa9029f8
JB		 1675 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1676 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1677 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1678
1679 inc = 1ULL<<__ffs64(mask);
1680 val = (start & mask);
1681 addr = (start & ~mask) | (val & mask);
1682 do {
1683 bool used = false;
1684
1685 tmp_addr[5] = addr >> 0*8;
1686 tmp_addr[4] = addr >> 1*8;
1687 tmp_addr[3] = addr >> 2*8;
1688 tmp_addr[2] = addr >> 3*8;
1689 tmp_addr[1] = addr >> 4*8;
1690 tmp_addr[0] = addr >> 5*8;
1691
1692 val += inc;
1693
1694 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1695 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1696 used = true;
1697 break;
1698 }
1699 }
1700
1701 if (!used) {
f142c6b9 1702 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1703 break;
1704 }
1705 addr = (start & ~mask) | (val & mask);
1706 } while (addr != start);
1707
1708 break;
1709 }
1710
6d71117a 1711 out_unlock:
fa9029f8
JB		 1712 mutex_unlock(&local->iflist_mtx);
1713}
1714
3e122be0 1715int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1716 unsigned char name_assign_type,
84efbb84 1717 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1718 struct vif_params *params)
f0706e82 1719{
f142c6b9 1720 struct net_device *ndev = NULL;
f0706e82 1721 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1722 struct txq_info *txqi;
80a83cfc 1723 void (*if_setup)(struct net_device *dev);
75636525 1724 int ret, i;
ded81f6b 1725 int txqs = 1;
f0706e82
JB		 1726
1727 ASSERT_RTNL();
75636525 1728
f142c6b9
JB		 1729 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1730 struct wireless_dev *wdev;
1731
1732 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1733 GFP_KERNEL);
1734 if (!sdata)
1735 return -ENOMEM;
1736 wdev = &sdata->wdev;
1737
1738 sdata->dev = NULL;
1739 strlcpy(sdata->name, name, IFNAMSIZ);
1740 ieee80211_assign_perm_addr(local, wdev->address, type);
1741 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1742 } else {
ba8c3d6f
FF		 1743 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1744 sizeof(void *));
1745 int txq_size = 0;
1746
1747 if (local->ops->wake_tx_queue)
1748 txq_size += sizeof(struct txq_info) +
1749 local->hw.txq_data_size;
1750
80a83cfc
MK		 1751 if (local->ops->wake_tx_queue)
1752 if_setup = ieee80211_if_setup_no_queue;
1753 else
1754 if_setup = ieee80211_if_setup;
1755
f142c6b9
JB		 1756 if (local->hw.queues >= IEEE80211_NUM_ACS)
1757 txqs = IEEE80211_NUM_ACS;
1758
ba8c3d6f 1759 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1760 name, name_assign_type,
80a83cfc 1761 if_setup, txqs, 1);
f142c6b9
JB		 1762 if (!ndev)
1763 return -ENOMEM;
1764 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1765
5a490510
JB		 1766 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1767 if (!ndev->tstats) {
1768 free_netdev(ndev);
1769 return -ENOMEM;
1770 }
1771
f142c6b9
JB		 1772 ndev->needed_headroom = local->tx_headroom +
1773 4*6 /* four MAC addresses */
1774 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1775 + 6 /* mesh */
1776 + 8 /* rfc1042/bridge tunnel */
1777 - ETH_HLEN /* ethernet hard_header_len */
1778 + IEEE80211_ENCRYPT_HEADROOM;
1779 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1780
1781 ret = dev_alloc_name(ndev, ndev->name);
1782 if (ret < 0) {
e6436be2 1783 ieee80211_if_free(ndev);
f142c6b9
JB		 1784 return ret;
1785 }
1786
1787 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1788 if (params && is_valid_ether_addr(params->macaddr))
1789 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1790 else
1791 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1792 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1793
1794 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1795 sdata = netdev_priv(ndev);
1796 ndev->ieee80211_ptr = &sdata->wdev;
1797 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1798 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1799
ba8c3d6f
FF		 1800 if (txq_size) {
1801 txqi = netdev_priv(ndev) + size;
fa962b92 1802 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1803 }
1804
f142c6b9
JB		 1805 sdata->dev = ndev;
1806 }
75636525
JB		 1807
1808 /* initialise type-independent data */
f0706e82 1809 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1810 sdata->local = local;
75636525
JB		 1811
1812 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1813 skb_queue_head_init(&sdata->fragments[i].skb_list);
1814
1815 INIT_LIST_HEAD(&sdata->key_list);
1816
164eb02d
SW		 1817 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1818 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1819 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1820 ieee80211_delayed_tailroom_dec);
97f97b1f 1821
57fbcce3 1822 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1823 struct ieee80211_supported_band *sband;
1824 sband = local->hw.wiphy->bands[i];
1825 sdata->rc_rateidx_mask[i] =
1826 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1827 if (sband) {
1828 __le16 cap;
1829 u16 *vht_rate_mask;
1830
19468413
SW		 1831 memcpy(sdata->rc_rateidx_mcs_mask[i],
1832 sband->ht_cap.mcs.rx_mask,
1833 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1834
1835 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1836 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1837 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1838 } else {
19468413
SW		 1839 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1840 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1841 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1842 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1843 }
37eb0b16 1844 }
75636525 1845
3a25a8c8
JB		 1846 ieee80211_set_default_queues(sdata);
1847
1ea6f9c0
JB		 1848 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1849 sdata->user_power_level = local->user_power_level;
1850
2475b1cc
MS		 1851 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1852
75636525
JB		 1853 /* setup type-dependent data */
1854 ieee80211_setup_sdata(sdata, type);
f0706e82 1855
f142c6b9
JB		 1856 if (ndev) {
1857 if (params) {
1858 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1859 if (type == NL80211_IFTYPE_STATION)
1860 sdata->u.mgd.use_4addr = params->use_4addr;
1861 }
9bc383de 1862
f142c6b9 1863 ndev->features |= local->hw.netdev_features;
72d78728 1864
b7ffbd7e
JB		 1865 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1866
f142c6b9
JB		 1867 ret = register_netdevice(ndev);
1868 if (ret) {
e6436be2 1869 ieee80211_if_free(ndev);
f142c6b9
JB		 1870 return ret;
1871 }
1872 }
f0706e82 1873
c771c9d8 1874 mutex_lock(&local->iflist_mtx);
79010420 1875 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1876 mutex_unlock(&local->iflist_mtx);
79010420 1877
84efbb84
JB		 1878 if (new_wdev)
1879 *new_wdev = &sdata->wdev;
f0706e82 1880
f0706e82 1881 return 0;
f0706e82
JB		 1882}
1883
f698d856 1884void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1885{
f0706e82 1886 ASSERT_RTNL();
11a843b7 1887
c771c9d8 1888 mutex_lock(&sdata->local->iflist_mtx);
75636525 1889 list_del_rcu(&sdata->list);
c771c9d8
JB		 1890 mutex_unlock(&sdata->local->iflist_mtx);
1891
75636525 1892 synchronize_rcu();
f142c6b9
JB		 1893
1894 if (sdata->dev) {
1895 unregister_netdevice(sdata->dev);
1896 } else {
1897 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1898 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1899 kfree(sdata);
1900 }
1901}
1902
1903void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1904{
1905 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1906 return;
1907 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1908}
1909
75636525 1910void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1911{
75636525 1912 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1913 LIST_HEAD(unreg_list);
f142c6b9 1914 LIST_HEAD(wdev_list);
f0706e82
JB		 1915
1916 ASSERT_RTNL();
1917
d8d9008c
JB		 1918 /* Before destroying the interfaces, make sure they're all stopped so
1919 * that the hardware is stopped. Otherwise, the driver might still be
1920 * iterating the interfaces during the shutdown, e.g. from a worker
1921 * or from RX processing or similar, and if it does so (using atomic
1922 * iteration) while we're manipulating the list, the iteration will
1923 * crash.
1924 *
1925 * After this, the hardware should be stopped and the driver should
1926 * have stopped all of its activities, so that we can do RCU-unaware
1927 * manipulations of the interface list below.
c8aa22db 1928 */
d8d9008c
JB		 1929 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1930
1931 WARN(local->open_count, "%s: open count remains %d\n",
1932 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1933
efe117ab 1934 mutex_lock(&local->iflist_mtx);
75636525
JB		 1935 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1936 list_del(&sdata->list);
c771c9d8 1937
f142c6b9
JB		 1938 if (sdata->dev)
1939 unregister_netdevice_queue(sdata->dev, &unreg_list);
1940 else
1941 list_add(&sdata->list, &wdev_list);
f0706e82 1942 }
efe117ab
ED		 1943 mutex_unlock(&local->iflist_mtx);
1944 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1945
1946 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1947 list_del(&sdata->list);
1948 cfg80211_unregister_wdev(&sdata->wdev);
1949 kfree(sdata);
1950 }
f0706e82 1951}
5cff20e6 1952
47846c9b 1953static int netdev_notify(struct notifier_block *nb,
351638e7 1954 unsigned long state, void *ptr)
47846c9b 1955{
351638e7 1956 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1957 struct ieee80211_sub_if_data *sdata;
1958
1959 if (state != NETDEV_CHANGENAME)
8bd811aa 1960 return NOTIFY_DONE;
47846c9b
JB		 1961
1962 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1963 return NOTIFY_DONE;
47846c9b
JB		 1964
1965 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1966 return NOTIFY_DONE;
47846c9b
JB		 1967
1968 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1969 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1970 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1971
1972 return NOTIFY_OK;
47846c9b
JB		 1973}
1974
1975static struct notifier_block mac80211_netdev_notifier = {
1976 .notifier_call = netdev_notify,
1977};
1978
1979int ieee80211_iface_init(void)
1980{
1981 return register_netdevice_notifier(&mac80211_netdev_notifier);
1982}
1983
1984void ieee80211_iface_exit(void)
1985{
1986 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1987}
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