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mac80211: add support for driver tx power reporting
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
5a0e3ad6 14#include <linux/slab.h>
f0706e82
JB		 15#include <linux/kernel.h>
16#include <linux/if_arp.h>
17#include <linux/netdevice.h>
18#include <linux/rtnetlink.h>
19#include <net/mac80211.h>
cf0277e7 20#include <net/ieee80211_radiotap.h>
f0706e82
JB		 21#include "ieee80211_i.h"
22#include "sta_info.h"
e9f207f0 23#include "debugfs_netdev.h"
ee385855 24#include "mesh.h"
0d143fe1 25#include "led.h"
24487981 26#include "driver-ops.h"
cf0277e7 27#include "wme.h"
1be7fe8d 28#include "rate.h"
0d143fe1 29
c771c9d8
JB		 30/**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
38 * the iflist_mtx.
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
41 *
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
44 */
45
1ea6f9c0
JB		 46bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47{
48 struct ieee80211_chanctx_conf *chanctx_conf;
49 int power;
50
51 rcu_read_lock();
52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
53 if (!chanctx_conf) {
54 rcu_read_unlock();
55 return false;
56 }
57
0430c883 58 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 59 rcu_read_unlock();
60
61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
62 power = min(power, sdata->user_power_level);
63
64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->ap_power_level);
66
67 if (power != sdata->vif.bss_conf.txpower) {
68 sdata->vif.bss_conf.txpower = power;
69 ieee80211_hw_config(sdata->local, 0);
70 return true;
71 }
72
73 return false;
74}
75
76void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
77{
78 if (__ieee80211_recalc_txpower(sdata))
79 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
80}
c771c9d8 81
62a40a15 82static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 83{
84 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
85 return 0;
86
87 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
88 return IEEE80211_CONF_CHANGE_IDLE;
89}
90
62a40a15 91static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 92{
93 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
94 return 0;
95
39ecc01d 96 ieee80211_flush_queues(local, NULL);
cc45ae54
JB		 97
98 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
99 return IEEE80211_CONF_CHANGE_IDLE;
100}
101
62a40a15
JB		 102static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
103 bool force_active)
cc45ae54 104{
1d5e1266 105 bool working, scanning, active;
cc45ae54 106 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 107
cc45ae54
JB		 108 lockdep_assert_held(&local->mtx);
109
62a40a15
JB		 110 active = force_active ||
111 !list_empty(&local->chanctx_list) ||
112 local->monitors;
cc45ae54 113
1d5e1266
JB		 114 working = !local->ops->remain_on_channel &&
115 !list_empty(&local->roc_list);
cc45ae54 116
f1e3e051
JB		 117 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
118 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 119
cc45ae54
JB		 120 if (working || scanning)
121 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
122 else
123 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124
fd0f979a 125 if (active)
cc45ae54
JB		 126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
127 else
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129
130 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
131
fd0f979a 132 if (working || scanning || active)
62a40a15
JB		 133 return __ieee80211_idle_off(local);
134 return __ieee80211_idle_on(local);
135}
136
137u32 ieee80211_idle_off(struct ieee80211_local *local)
138{
139 return __ieee80211_recalc_idle(local, true);
140}
141
142void ieee80211_recalc_idle(struct ieee80211_local *local)
143{
144 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 145 if (change)
146 ieee80211_hw_config(local, change);
cc45ae54
JB		 147}
148
0d143fe1
JB		 149static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
150{
09b1426e 151 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 152 return -EINVAL;
0d143fe1 153
0d143fe1
JB		 154 dev->mtu = new_mtu;
155 return 0;
156}
157
3899ba90 158static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 159 bool check_dup)
478622e8 160{
ac20976d
HS		 161 struct ieee80211_local *local = sdata->local;
162 struct ieee80211_sub_if_data *iter;
478622e8
HS		 163 u64 new, mask, tmp;
164 u8 *m;
165 int ret = 0;
166
167 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
168 return 0;
169
170 m = addr;
171 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
174
175 m = local->hw.wiphy->addr_mask;
176 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179
31eba5bc
FF		 180 if (!check_dup)
181 return ret;
478622e8
HS		 182
183 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 184 list_for_each_entry(iter, &local->interfaces, list) {
185 if (iter == sdata)
478622e8
HS		 186 continue;
187
3899ba90
JL		 188 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
189 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 190 continue;
191
ac20976d 192 m = iter->vif.addr;
478622e8
HS		 193 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
194 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
195 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
196
197 if ((new & ~mask) != (tmp & ~mask)) {
198 ret = -EINVAL;
199 break;
200 }
201 }
202 mutex_unlock(&local->iflist_mtx);
203
204 return ret;
205}
206
47846c9b
JB		 207static int ieee80211_change_mac(struct net_device *dev, void *addr)
208{
209 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 210 struct sockaddr *sa = addr;
31eba5bc 211 bool check_dup = true;
47846c9b
JB		 212 int ret;
213
9607e6b6 214 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 215 return -EBUSY;
216
31eba5bc
FF		 217 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
218 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
219 check_dup = false;
220
3899ba90 221 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 222 if (ret)
223 return ret;
224
fc5f7577 225 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 226
227 if (ret == 0)
fc5f7577 228 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 229
230 return ret;
231}
232
0d143fe1
JB		 233static inline int identical_mac_addr_allowed(int type1, int type2)
234{
235 return type1 == NL80211_IFTYPE_MONITOR ||
236 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 237 type1 == NL80211_IFTYPE_P2P_DEVICE ||
238 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
240 (type1 == NL80211_IFTYPE_WDS &&
241 (type2 == NL80211_IFTYPE_WDS ||
242 type2 == NL80211_IFTYPE_AP)) ||
243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
244 (type1 == NL80211_IFTYPE_AP_VLAN &&
245 (type2 == NL80211_IFTYPE_AP ||
246 type2 == NL80211_IFTYPE_AP_VLAN));
247}
248
87490f6d
JB		 249static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
250 enum nl80211_iftype iftype)
0d143fe1 251{
b4a4bf5d 252 struct ieee80211_local *local = sdata->local;
87490f6d 253 struct ieee80211_sub_if_data *nsdata;
b6a55015 254 int ret;
0d143fe1 255
87490f6d 256 ASSERT_RTNL();
0d143fe1
JB		 257
258 /* we hold the RTNL here so can safely walk the list */
259 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 260 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 261 /*
262 * Allow only a single IBSS interface to be up at any
263 * time. This is restricted because beacon distribution
264 * cannot work properly if both are in the same IBSS.
265 *
266 * To remove this restriction we'd have to disallow them
267 * from setting the same SSID on different IBSS interfaces
268 * belonging to the same hardware. Then, however, we're
269 * faced with having to adopt two different TSF timers...
270 */
87490f6d 271 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 272 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
273 return -EBUSY;
73da7d5b
SW		 274 /*
275 * will not add another interface while any channel
276 * switch is active.
277 */
278 if (nsdata->vif.csa_active)
279 return -EBUSY;
0d143fe1
JB		 280
281 /*
282 * The remaining checks are only performed for interfaces
283 * with the same MAC address.
284 */
371a255e
JB		 285 if (!ether_addr_equal(sdata->vif.addr,
286 nsdata->vif.addr))
0d143fe1
JB		 287 continue;
288
289 /*
290 * check whether it may have the same address
291 */
87490f6d 292 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 293 nsdata->vif.type))
294 return -ENOTUNIQ;
295
296 /*
297 * can only add VLANs to enabled APs
298 */
87490f6d 299 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 300 nsdata->vif.type == NL80211_IFTYPE_AP)
301 sdata->bss = &nsdata->u.ap;
302 }
303 }
304
b6a55015
LC		 305 mutex_lock(&local->chanctx_mtx);
306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
307 mutex_unlock(&local->chanctx_mtx);
308 return ret;
87490f6d
JB		 309}
310
a9865538
JB		 311static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
3a25a8c8
JB		 313{
314 int n_queues = sdata->local->hw.queues;
315 int i;
316
a9865538 317 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 318 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
319 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
320 IEEE80211_INVAL_HW_QUEUE))
321 return -EINVAL;
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
323 n_queues))
324 return -EINVAL;
325 }
3a25a8c8
JB		 326 }
327
a9865538
JB		 328 if ((iftype != NL80211_IFTYPE_AP &&
329 iftype != NL80211_IFTYPE_P2P_GO &&
330 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 331 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 332 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
333 return 0;
334 }
335
336 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
337 return -EINVAL;
338
339 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
340 return -EINVAL;
341
342 return 0;
343}
344
85416a4f
CL		 345void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
346 const int offset)
347{
348 struct ieee80211_local *local = sdata->local;
349 u32 flags = sdata->u.mntr_flags;
350
351#define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
354 } while (0)
355
356 ADJUST(FCSFAIL, fcsfail);
357 ADJUST(PLCPFAIL, plcpfail);
358 ADJUST(CONTROL, control);
359 ADJUST(CONTROL, pspoll);
360 ADJUST(OTHER_BSS, other_bss);
361
362#undef ADJUST
363}
364
3a25a8c8
JB		 365static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
366{
367 struct ieee80211_local *local = sdata->local;
368 int i;
369
370 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
371 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
372 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 373 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 374 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 375 else
376 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 377 }
378 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
379}
380
3c3e21e7 381int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 382{
383 struct ieee80211_sub_if_data *sdata;
8b305780 384 int ret;
4b6f1dd6
JB		 385
386 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
387 return 0;
388
8b305780 389 ASSERT_RTNL();
685fb72b 390
4b6f1dd6 391 if (local->monitor_sdata)
8b305780 392 return 0;
4b6f1dd6
JB		 393
394 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 395 if (!sdata)
396 return -ENOMEM;
4b6f1dd6
JB		 397
398 /* set up data */
399 sdata->local = local;
400 sdata->vif.type = NL80211_IFTYPE_MONITOR;
401 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
402 wiphy_name(local->hw.wiphy));
34171dc0 403 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 404
2475b1cc
MS		 405 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
406
3a25a8c8
JB		 407 ieee80211_set_default_queues(sdata);
408
4b6f1dd6
JB		 409 ret = drv_add_interface(local, sdata);
410 if (WARN_ON(ret)) {
411 /* ok .. stupid driver, it asked for this! */
412 kfree(sdata);
8b305780 413 return ret;
4b6f1dd6
JB		 414 }
415
a9865538 416 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 417 if (ret) {
418 kfree(sdata);
8b305780 419 return ret;
3a25a8c8
JB		 420 }
421
fab57a6c
JB		 422 mutex_lock(&local->iflist_mtx);
423 rcu_assign_pointer(local->monitor_sdata, sdata);
424 mutex_unlock(&local->iflist_mtx);
425
34a3740d 426 mutex_lock(&local->mtx);
4bf88530 427 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 428 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 429 mutex_unlock(&local->mtx);
55de908a 430 if (ret) {
fab57a6c 431 mutex_lock(&local->iflist_mtx);
0c2bef46 432 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 433 mutex_unlock(&local->iflist_mtx);
434 synchronize_net();
55de908a
JB		 435 drv_remove_interface(local, sdata);
436 kfree(sdata);
8b305780 437 return ret;
55de908a
JB		 438 }
439
8b305780 440 return 0;
4b6f1dd6
JB		 441}
442
3c3e21e7 443void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 444{
445 struct ieee80211_sub_if_data *sdata;
446
447 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
448 return;
449
8b305780
JB		 450 ASSERT_RTNL();
451
685fb72b 452 mutex_lock(&local->iflist_mtx);
4b6f1dd6 453
685fb72b
JB		 454 sdata = rcu_dereference_protected(local->monitor_sdata,
455 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 456 if (!sdata) {
457 mutex_unlock(&local->iflist_mtx);
458 return;
459 }
4b6f1dd6 460
0c2bef46 461 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 462 mutex_unlock(&local->iflist_mtx);
463
4b6f1dd6
JB		 464 synchronize_net();
465
34a3740d 466 mutex_lock(&local->mtx);
55de908a 467 ieee80211_vif_release_channel(sdata);
34a3740d 468 mutex_unlock(&local->mtx);
55de908a 469
4b6f1dd6
JB		 470 drv_remove_interface(local, sdata);
471
472 kfree(sdata);
473}
474
34d4bc4d
JB		 475/*
476 * NOTE: Be very careful when changing this function, it must NOT return
477 * an error on interface type changes that have been pre-checked, so most
478 * checks should be in ieee80211_check_concurrent_iface.
479 */
f142c6b9 480int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 481{
f142c6b9
JB		 482 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
483 struct net_device *dev = wdev->netdev;
87490f6d
JB		 484 struct ieee80211_local *local = sdata->local;
485 struct sta_info *sta;
486 u32 changed = 0;
487 int res;
488 u32 hw_reconf_flags = 0;
489
0d143fe1
JB		 490 switch (sdata->vif.type) {
491 case NL80211_IFTYPE_WDS:
492 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
493 return -ENOLINK;
494 break;
665c93a9
JB		 495 case NL80211_IFTYPE_AP_VLAN: {
496 struct ieee80211_sub_if_data *master;
497
0d143fe1
JB		 498 if (!sdata->bss)
499 return -ENOLINK;
665c93a9 500
4e141dad 501 mutex_lock(&local->mtx);
0d143fe1 502 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 503 mutex_unlock(&local->mtx);
665c93a9
JB		 504
505 master = container_of(sdata->bss,
506 struct ieee80211_sub_if_data, u.ap);
507 sdata->control_port_protocol =
508 master->control_port_protocol;
509 sdata->control_port_no_encrypt =
510 master->control_port_no_encrypt;
1351c5d3
JB		 511 sdata->vif.cab_queue = master->vif.cab_queue;
512 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
513 sizeof(sdata->vif.hw_queue));
0d143fe1 514 break;
665c93a9 515 }
0d143fe1
JB		 516 case NL80211_IFTYPE_AP:
517 sdata->bss = &sdata->u.ap;
518 break;
519 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 520 case NL80211_IFTYPE_STATION:
521 case NL80211_IFTYPE_MONITOR:
522 case NL80211_IFTYPE_ADHOC:
f142c6b9 523 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 524 /* no special treatment */
525 break;
526 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 527 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 528 case NL80211_IFTYPE_P2P_CLIENT:
529 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 530 /* cannot happen */
531 WARN_ON(1);
532 break;
533 }
534
535 if (local->open_count == 0) {
24487981 536 res = drv_start(local);
0d143fe1
JB		 537 if (res)
538 goto err_del_bss;
e8975581
JB		 539 /* we're brought up, everything changes */
540 hw_reconf_flags = ~0;
1f87f7d3 541 ieee80211_led_radio(local, true);
67408c8c
JB		 542 ieee80211_mod_tpt_led_trig(local,
543 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 544 }
545
546 /*
bf533e0b
JB		 547 * Copy the hopefully now-present MAC address to
548 * this interface, if it has the special null one.
0d143fe1 549 */
f142c6b9 550 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 551 memcpy(dev->dev_addr,
552 local->hw.wiphy->perm_addr,
553 ETH_ALEN);
554 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
555
556 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 557 res = -EADDRNOTAVAIL;
558 goto err_stop;
0adc23f5 559 }
0d143fe1
JB		 560 }
561
0d143fe1
JB		 562 switch (sdata->vif.type) {
563 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 564 /* no need to tell driver, but set carrier and chanctx */
565 if (rtnl_dereference(sdata->bss->beacon)) {
566 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 567 netif_carrier_on(dev);
4d76d21b 568 } else {
3edaf3e6 569 netif_carrier_off(dev);
4d76d21b 570 }
0d143fe1
JB		 571 break;
572 case NL80211_IFTYPE_MONITOR:
573 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
574 local->cooked_mntrs++;
575 break;
576 }
577
31eba5bc
FF		 578 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
579 res = drv_add_interface(local, sdata);
580 if (res)
581 goto err_stop;
582 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 583 res = ieee80211_add_virtual_monitor(local);
584 if (res)
585 goto err_stop;
586 }
587
0d143fe1
JB		 588 /* must be before the call to ieee80211_configure_filter */
589 local->monitors++;
e8975581 590 if (local->monitors == 1) {
0869aea0
JB		 591 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
592 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 593 }
0d143fe1 594
85416a4f 595 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 596 ieee80211_configure_filter(local);
801d929c
FF		 597 mutex_lock(&local->mtx);
598 ieee80211_recalc_idle(local);
599 mutex_unlock(&local->mtx);
53e9b1de
DG		 600
601 netif_carrier_on(dev);
0d143fe1 602 break;
0d143fe1 603 default:
34d4bc4d 604 if (coming_up) {
075e0847
JB		 605 ieee80211_del_virtual_monitor(local);
606
7b7eab6f 607 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 608 if (res)
609 goto err_stop;
a9865538
JB		 610 res = ieee80211_check_queues(sdata,
611 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 612 if (res)
613 goto err_del_interface;
34d4bc4d 614 }
0d143fe1 615
29cbe68c 616 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 617 local->fif_pspoll++;
7be5086d 618 local->fif_probe_req++;
e3b90ca2 619
e3b90ca2 620 ieee80211_configure_filter(local);
7be5086d
JB		 621 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
622 local->fif_probe_req++;
a3c9aa51 623 }
e3b90ca2 624
f142c6b9
JB		 625 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
626 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 627 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 628
c405c629
JB		 629 switch (sdata->vif.type) {
630 case NL80211_IFTYPE_STATION:
631 case NL80211_IFTYPE_ADHOC:
632 case NL80211_IFTYPE_AP:
633 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 634 netif_carrier_off(dev);
c405c629 635 break;
1411af15 636 case NL80211_IFTYPE_WDS:
f142c6b9 637 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 638 break;
c405c629 639 default:
a2310824
JB		 640 /* not reached */
641 WARN_ON(1);
c405c629 642 }
59034591
EP		 643
644 /*
645 * set default queue parameters so drivers don't
646 * need to initialise the hardware if the hardware
647 * doesn't start up with sane defaults
648 */
3abead59 649 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 650 }
651
2d2080c3
JB		 652 set_bit(SDATA_STATE_RUNNING, &sdata->state);
653
0d143fe1
JB		 654 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
655 /* Create STA entry for the WDS peer */
656 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
657 GFP_KERNEL);
658 if (!sta) {
659 res = -ENOMEM;
660 goto err_del_interface;
661 }
662
83d5cc01
JB		 663 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
664 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
665 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 666
667 res = sta_info_insert(sta);
668 if (res) {
669 /* STA has been freed */
670 goto err_del_interface;
671 }
1be7fe8d
BJ		 672
673 rate_control_rate_init(sta);
1411af15 674 netif_carrier_on(dev);
f142c6b9
JB		 675 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
676 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 677 }
678
0d143fe1
JB		 679 /*
680 * set_multicast_list will be invoked by the networking core
681 * which will check whether any increments here were done in
682 * error and sync them down to the hardware as filter flags.
683 */
684 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
685 atomic_inc(&local->iff_allmultis);
686
687 if (sdata->flags & IEEE80211_SDATA_PROMISC)
688 atomic_inc(&local->iff_promiscs);
689
34d4bc4d
JB		 690 if (coming_up)
691 local->open_count++;
692
59034591 693 if (hw_reconf_flags)
e8975581 694 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 695
10f644a4 696 ieee80211_recalc_ps(local, -1);
965bedad 697
2b436312
JB		 698 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
699 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
700 /* XXX: for AP_VLAN, actually track AP queues */
701 netif_tx_start_all_queues(dev);
702 } else if (dev) {
2b730daa
JB		 703 unsigned long flags;
704 int n_acs = IEEE80211_NUM_ACS;
705 int ac;
706
707 if (local->hw.queues < IEEE80211_NUM_ACS)
708 n_acs = 1;
709
710 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
711 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
712 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
713 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
714 for (ac = 0; ac < n_acs; ac++) {
715 int ac_queue = sdata->vif.hw_queue[ac];
716
717 if (local->queue_stop_reasons[ac_queue] == 0 &&
718 skb_queue_empty(&local->pending[ac_queue]))
719 netif_start_subqueue(dev, ac);
720 }
721 }
722 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
723 }
0d143fe1
JB		 724
725 return 0;
726 err_del_interface:
7b7eab6f 727 drv_remove_interface(local, sdata);
0d143fe1 728 err_stop:
24487981
JB		 729 if (!local->open_count)
730 drv_stop(local);
0d143fe1
JB		 731 err_del_bss:
732 sdata->bss = NULL;
4e141dad
MK		 733 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
734 mutex_lock(&local->mtx);
0d143fe1 735 list_del(&sdata->u.vlan.list);
4e141dad
MK		 736 mutex_unlock(&local->mtx);
737 }
4d6c36fa 738 /* might already be clear but that doesn't matter */
2d2080c3 739 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 740 return res;
741}
742
34d4bc4d 743static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 744{
745 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 746 int err;
747
748 /* fail early if user set an invalid address */
2fcf2824 749 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 750 return -EADDRNOTAVAIL;
751
752 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
753 if (err)
754 return err;
755
f142c6b9 756 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 757}
758
759static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
760 bool going_down)
761{
0d143fe1 762 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 763 unsigned long flags;
764 struct sk_buff *skb, *tmp;
e8975581 765 u32 hw_reconf_flags = 0;
09f4114e 766 int i, flushed;
397a7a24 767 struct ps_data *ps;
d2859df5 768 struct cfg80211_chan_def chandef;
0d143fe1 769
c29acf20
RM		 770 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
771
e2fd5dbc 772 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 773 ieee80211_scan_cancel(local);
774
0d143fe1
JB		 775 /*
776 * Stop TX on this interface first.
777 */
f142c6b9
JB		 778 if (sdata->dev)
779 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 780
c8f994ee 781 ieee80211_roc_purge(local, sdata);
af6b6374 782
8ffcc704
EG		 783 switch (sdata->vif.type) {
784 case NL80211_IFTYPE_STATION:
572078be 785 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 786 break;
787 case NL80211_IFTYPE_ADHOC:
cd7760e6 788 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 789 break;
790 case NL80211_IFTYPE_AP:
791 cancel_work_sync(&sdata->u.ap.request_smps_work);
792 break;
793 default:
794 break;
795 }
cd7760e6 796
0d143fe1
JB		 797 /*
798 * Remove all stations associated with this interface.
799 *
800 * This must be done before calling ops->remove_interface()
801 * because otherwise we can later invoke ops->sta_notify()
802 * whenever the STAs are removed, and that invalidates driver
803 * assumptions about always getting a vif pointer that is valid
804 * (because if we remove a STA after ops->remove_interface()
805 * the driver will have removed the vif info already!)
806 *
09f4114e
JB		 807 * This is relevant only in WDS mode, in all other modes we've
808 * already removed all stations when disconnecting or similar,
809 * so warn otherwise.
0d143fe1 810 */
d34ba216 811 flushed = sta_info_flush(sdata);
09f4114e
JB		 812 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
813 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 814
afdc7c18 815 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 816 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
817 atomic_dec(&local->iff_allmultis);
818
819 if (sdata->flags & IEEE80211_SDATA_PROMISC)
820 atomic_dec(&local->iff_promiscs);
821
7be5086d 822 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 823 local->fif_pspoll--;
7be5086d
JB		 824 local->fif_probe_req--;
825 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
826 local->fif_probe_req--;
827 }
e3b90ca2 828
f142c6b9
JB		 829 if (sdata->dev) {
830 netif_addr_lock_bh(sdata->dev);
831 spin_lock_bh(&local->filter_lock);
832 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
833 sdata->dev->addr_len);
834 spin_unlock_bh(&local->filter_lock);
835 netif_addr_unlock_bh(sdata->dev);
f142c6b9 836 }
3ac64bee 837
7cbf0ba5
VN		 838 del_timer_sync(&local->dynamic_ps_timer);
839 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 840
04ecd257 841 cancel_work_sync(&sdata->recalc_smps);
dbd72850 842 sdata_lock(sdata);
59af6928 843 mutex_lock(&local->mtx);
73da7d5b 844 sdata->vif.csa_active = false;
0c21e632
LC		 845 if (sdata->vif.type == NL80211_IFTYPE_STATION)
846 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 847 if (sdata->csa_block_tx) {
848 ieee80211_wake_vif_queues(local, sdata,
849 IEEE80211_QUEUE_STOP_REASON_CSA);
850 sdata->csa_block_tx = false;
851 }
59af6928 852 mutex_unlock(&local->mtx);
dbd72850 853 sdata_unlock(sdata);
59af6928 854
73da7d5b 855 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 856
164eb02d
SW		 857 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
858
859 if (sdata->wdev.cac_started) {
d2859df5 860 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 861 WARN_ON(local->suspended);
34a3740d 862 mutex_lock(&local->mtx);
164eb02d 863 ieee80211_vif_release_channel(sdata);
34a3740d 864 mutex_unlock(&local->mtx);
d2859df5
JD		 865 cfg80211_cac_event(sdata->dev, &chandef,
866 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 867 GFP_KERNEL);
868 }
869
0d143fe1
JB		 870 /* APs need special treatment */
871 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 872 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 873
874 /* down all dependent devices, that is VLANs */
57c9fff3 875 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 876 u.vlan.list)
877 dev_close(vlan->dev);
878 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 879 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
880 /* remove all packets in parent bc_buf pointing to this dev */
881 ps = &sdata->bss->ps;
882
883 spin_lock_irqsave(&ps->bc_buf.lock, flags);
884 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
885 if (skb->dev == sdata->dev) {
886 __skb_unlink(skb, &ps->bc_buf);
887 local->total_ps_buffered--;
888 ieee80211_free_txskb(&local->hw, skb);
889 }
890 }
891 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 892 }
893
34d4bc4d
JB		 894 if (going_down)
895 local->open_count--;
0d143fe1
JB		 896
897 switch (sdata->vif.type) {
898 case NL80211_IFTYPE_AP_VLAN:
4e141dad 899 mutex_lock(&local->mtx);
0d143fe1 900 list_del(&sdata->u.vlan.list);
4e141dad 901 mutex_unlock(&local->mtx);
0c2bef46 902 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 903 /* no need to tell driver */
904 break;
905 case NL80211_IFTYPE_MONITOR:
906 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
907 local->cooked_mntrs--;
908 break;
909 }
910
911 local->monitors--;
e8975581 912 if (local->monitors == 0) {
0869aea0
JB		 913 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
914 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 915 }
0d143fe1 916
85416a4f 917 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 918 break;
f142c6b9
JB		 919 case NL80211_IFTYPE_P2P_DEVICE:
920 /* relies on synchronize_rcu() below */
0c2bef46 921 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 922 /* fall through */
0d143fe1 923 default:
0b7dff4f 924 cancel_work_sync(&sdata->work);
35f20c14
JB		 925 /*
926 * When we get here, the interface is marked down.
7907c7d3
JB		 927 * Free the remaining keys, if there are any
928 * (shouldn't be, except maybe in WDS mode?)
75de9113 929 *
7907c7d3
JB		 930 * Force the key freeing to always synchronize_net()
931 * to wait for the RX path in case it is using this
932 * interface enqueuing frames * at this very time on
75de9113 933 * another CPU.
35f20c14 934 */
7907c7d3 935 ieee80211_free_keys(sdata, true);
b9dcf712 936
1861b845
JB		 937 /* fall through */
938 case NL80211_IFTYPE_AP:
939 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 940 }
941
942 sdata->bss = NULL;
943
5061b0c2
JB		 944 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
945 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
946 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
947 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
948 if (info->control.vif == &sdata->vif) {
949 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 950 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 951 }
952 }
953 }
954 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 955
b2c0958b
JB		 956 if (local->open_count == 0)
957 ieee80211_clear_tx_pending(local);
958
959 /*
960 * If the interface goes down while suspended, presumably because
961 * the device was unplugged and that happens before our resume,
962 * then the driver is already unconfigured and the remainder of
963 * this function isn't needed.
964 * XXX: what about WoWLAN? If the device has software state, e.g.
965 * memory allocated, it might expect teardown commands from
966 * mac80211 here?
967 */
968 if (local->suspended) {
969 WARN_ON(local->wowlan);
970 WARN_ON(rtnl_dereference(local->monitor_sdata));
971 return;
972 }
973
974 switch (sdata->vif.type) {
975 case NL80211_IFTYPE_AP_VLAN:
976 break;
977 case NL80211_IFTYPE_MONITOR:
978 if (local->monitors == 0)
979 ieee80211_del_virtual_monitor(local);
980
981 mutex_lock(&local->mtx);
982 ieee80211_recalc_idle(local);
983 mutex_unlock(&local->mtx);
31eba5bc
FF		 984
985 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
986 break;
987
988 /* fall through */
b2c0958b
JB		 989 default:
990 if (going_down)
991 drv_remove_interface(local, sdata);
992 }
993
994 ieee80211_recalc_ps(local, -1);
995
996 if (local->open_count == 0) {
997 ieee80211_stop_device(local);
998
999 /* no reconfiguring after stop! */
1000 return;
1001 }
1002
1003 /* do after stop to avoid reconfiguring when we stop anyway */
1004 ieee80211_configure_filter(local);
1005 ieee80211_hw_config(local, hw_reconf_flags);
1006
1007 if (local->monitors == local->open_count)
075e0847 1008 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1009}
1010
1011static int ieee80211_stop(struct net_device *dev)
1012{
1013 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1014
1015 ieee80211_do_stop(sdata, true);
5061b0c2 1016
0d143fe1
JB		 1017 return 0;
1018}
1019
1020static void ieee80211_set_multicast_list(struct net_device *dev)
1021{
0d143fe1 1022 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1023 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1024 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1025
1026 allmulti = !!(dev->flags & IFF_ALLMULTI);
1027 promisc = !!(dev->flags & IFF_PROMISC);
1028 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1029 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1030
1031 if (allmulti != sdata_allmulti) {
1032 if (dev->flags & IFF_ALLMULTI)
1033 atomic_inc(&local->iff_allmultis);
1034 else
1035 atomic_dec(&local->iff_allmultis);
1036 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1037 }
1038
1039 if (promisc != sdata_promisc) {
1040 if (dev->flags & IFF_PROMISC)
1041 atomic_inc(&local->iff_promiscs);
1042 else
1043 atomic_dec(&local->iff_promiscs);
1044 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1045 }
3b8d81e0 1046 spin_lock_bh(&local->filter_lock);
22bedad3 1047 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1048 spin_unlock_bh(&local->filter_lock);
3ac64bee 1049 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1050}
1051
75636525
JB		 1052/*
1053 * Called when the netdev is removed or, by the code below, before
1054 * the interface type changes.
1055 */
f142c6b9 1056static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1057{
1058 int i;
1059
75636525 1060 /* free extra data */
7907c7d3 1061 ieee80211_free_keys(sdata, false);
75636525 1062
aee14ceb
JM		 1063 ieee80211_debugfs_remove_netdev(sdata);
1064
f0706e82 1065 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1066 __skb_queue_purge(&sdata->fragments[i].skb_list);
1067 sdata->fragment_next = 0;
11a843b7 1068
b9dcf712
JB		 1069 if (ieee80211_vif_is_mesh(&sdata->vif))
1070 mesh_rmc_free(sdata);
f0706e82
JB		 1071}
1072
f142c6b9
JB		 1073static void ieee80211_uninit(struct net_device *dev)
1074{
1075 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1076}
1077
cf0277e7 1078static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1079 struct sk_buff *skb,
99932d4f
DB		 1080 void *accel_priv,
1081 select_queue_fallback_t fallback)
cf0277e7
JB		 1082{
1083 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1084}
1085
587e729e
JB		 1086static const struct net_device_ops ieee80211_dataif_ops = {
1087 .ndo_open = ieee80211_open,
1088 .ndo_stop = ieee80211_stop,
f142c6b9 1089 .ndo_uninit = ieee80211_uninit,
587e729e 1090 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1091 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1092 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1093 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1094 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1095};
1096
cf0277e7 1097static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1098 struct sk_buff *skb,
99932d4f
DB		 1099 void *accel_priv,
1100 select_queue_fallback_t fallback)
cf0277e7
JB		 1101{
1102 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1103 struct ieee80211_local *local = sdata->local;
1104 struct ieee80211_hdr *hdr;
1105 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1106
32c5057b 1107 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1108 return 0;
1109
1110 if (skb->len < 4 ||
b49bb574 1111 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1112 return 0; /* doesn't matter, frame will be dropped */
1113
b49bb574 1114 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1115
00e96dec 1116 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1117}
1118
587e729e
JB		 1119static const struct net_device_ops ieee80211_monitorif_ops = {
1120 .ndo_open = ieee80211_open,
1121 .ndo_stop = ieee80211_stop,
f142c6b9 1122 .ndo_uninit = ieee80211_uninit,
587e729e 1123 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1124 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1125 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1126 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1127 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1128};
1129
1130static void ieee80211_if_setup(struct net_device *dev)
1131{
1132 ether_setup(dev);
550fd08c 1133 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1134 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1135 dev->destructor = free_netdev;
1136}
1137
1fa57d01
JB		 1138static void ieee80211_iface_work(struct work_struct *work)
1139{
1140 struct ieee80211_sub_if_data *sdata =
1141 container_of(work, struct ieee80211_sub_if_data, work);
1142 struct ieee80211_local *local = sdata->local;
1143 struct sk_buff *skb;
344eec67 1144 struct sta_info *sta;
c1475ca9 1145 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1146 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1147
1148 if (!ieee80211_sdata_running(sdata))
1149 return;
1150
1151 if (local->scanning)
1152 return;
1153
1154 /*
1155 * ieee80211_queue_work() should have picked up most cases,
1156 * here we'll pick the rest.
1157 */
1158 if (WARN(local->suspended,
1159 "interface work scheduled while going to suspend\n"))
1160 return;
1161
1162 /* first process frames */
1163 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1164 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1165
c1475ca9
JB		 1166 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1167 ra_tid = (void *)&skb->cb;
1168 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1169 ra_tid->tid);
1170 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1171 ra_tid = (void *)&skb->cb;
1172 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1173 ra_tid->tid);
08cf42e8
MK		 1174 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1175 rx_agg = (void *)&skb->cb;
1176 mutex_lock(&local->sta_mtx);
1177 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1178 if (sta)
08cf42e8 1179 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1180 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1181 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1182 false, true);
08cf42e8
MK		 1183 mutex_unlock(&local->sta_mtx);
1184 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1185 rx_agg = (void *)&skb->cb;
1186 mutex_lock(&local->sta_mtx);
1187 sta = sta_info_get_bss(sdata, rx_agg->addr);
1188 if (sta)
1189 __ieee80211_stop_rx_ba_session(sta,
1190 rx_agg->tid,
1191 WLAN_BACK_RECIPIENT, 0,
1192 false);
1193 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1194 } else if (ieee80211_is_action(mgmt->frame_control) &&
1195 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1196 int len = skb->len;
bed7ee6e 1197
a93e3644 1198 mutex_lock(&local->sta_mtx);
875ae5f6 1199 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1200 if (sta) {
1201 switch (mgmt->u.action.u.addba_req.action_code) {
1202 case WLAN_ACTION_ADDBA_REQ:
1203 ieee80211_process_addba_request(
1204 local, sta, mgmt, len);
1205 break;
1206 case WLAN_ACTION_ADDBA_RESP:
1207 ieee80211_process_addba_resp(local, sta,
1208 mgmt, len);
1209 break;
1210 case WLAN_ACTION_DELBA:
1211 ieee80211_process_delba(sdata, sta,
1212 mgmt, len);
1213 break;
1214 default:
1215 WARN_ON(1);
1216 break;
1217 }
1218 }
a93e3644 1219 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1220 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1221 struct ieee80211_hdr *hdr = (void *)mgmt;
1222 /*
1223 * So the frame isn't mgmt, but frame_control
1224 * is at the right place anyway, of course, so
1225 * the if statement is correct.
1226 *
1227 * Warn if we have other data frame types here,
1228 * they must not get here.
1229 */
1230 WARN_ON(hdr->frame_control &
1231 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1232 WARN_ON(!(hdr->seq_ctrl &
1233 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1234 /*
1235 * This was a fragment of a frame, received while
1236 * a block-ack session was active. That cannot be
1237 * right, so terminate the session.
1238 */
a93e3644 1239 mutex_lock(&local->sta_mtx);
875ae5f6 1240 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1241 if (sta) {
1242 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1243 IEEE80211_QOS_CTL_TID_MASK;
1244
1245 __ieee80211_stop_rx_ba_session(
1246 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1247 WLAN_REASON_QSTA_REQUIRE_SETUP,
1248 true);
344eec67 1249 }
a93e3644 1250 mutex_unlock(&local->sta_mtx);
bed7ee6e 1251 } else switch (sdata->vif.type) {
1fa57d01
JB		 1252 case NL80211_IFTYPE_STATION:
1253 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1254 break;
1255 case NL80211_IFTYPE_ADHOC:
1256 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1257 break;
1258 case NL80211_IFTYPE_MESH_POINT:
1259 if (!ieee80211_vif_is_mesh(&sdata->vif))
1260 break;
1261 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1262 break;
1263 default:
1264 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1265 break;
1266 }
36b3a628
JB		 1267
1268 kfree_skb(skb);
1fa57d01
JB		 1269 }
1270
1271 /* then other type-dependent work */
1272 switch (sdata->vif.type) {
1273 case NL80211_IFTYPE_STATION:
1274 ieee80211_sta_work(sdata);
1275 break;
1276 case NL80211_IFTYPE_ADHOC:
1277 ieee80211_ibss_work(sdata);
1278 break;
1279 case NL80211_IFTYPE_MESH_POINT:
1280 if (!ieee80211_vif_is_mesh(&sdata->vif))
1281 break;
1282 ieee80211_mesh_work(sdata);
1283 break;
1284 default:
1285 break;
1286 }
1287}
1288
04ecd257
JB		 1289static void ieee80211_recalc_smps_work(struct work_struct *work)
1290{
1291 struct ieee80211_sub_if_data *sdata =
1292 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1293
1294 ieee80211_recalc_smps(sdata);
1295}
1fa57d01 1296
75636525
JB		 1297/*
1298 * Helper function to initialise an interface to a specific type.
1299 */
1300static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1301 enum nl80211_iftype type)
f0706e82 1302{
75636525
JB		 1303 /* clear type-dependent union */
1304 memset(&sdata->u, 0, sizeof(sdata->u));
1305
1306 /* and set some type-dependent values */
1307 sdata->vif.type = type;
2ca27bcf 1308 sdata->vif.p2p = false;
60719ffd 1309 sdata->wdev.iftype = type;
75636525 1310
a621fa4d
JB		 1311 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1312 sdata->control_port_no_encrypt = false;
2475b1cc 1313 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1314 sdata->vif.bss_conf.idle = true;
a621fa4d 1315
b53be792
SW		 1316 sdata->noack_map = 0;
1317
f142c6b9
JB		 1318 /* only monitor/p2p-device differ */
1319 if (sdata->dev) {
1320 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1321 sdata->dev->type = ARPHRD_ETHER;
1322 }
75636525 1323
35f20c14 1324 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1325 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1326 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1327 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1328 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1329 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1330
75636525 1331 switch (type) {
2ca27bcf
JB		 1332 case NL80211_IFTYPE_P2P_GO:
1333 type = NL80211_IFTYPE_AP;
1334 sdata->vif.type = type;
1335 sdata->vif.p2p = true;
1336 /* fall through */
05c914fe 1337 case NL80211_IFTYPE_AP:
d012a605 1338 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1339 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1340 INIT_WORK(&sdata->u.ap.request_smps_work,
1341 ieee80211_request_smps_ap_work);
ad2d223a 1342 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1343 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1344 break;
2ca27bcf
JB		 1345 case NL80211_IFTYPE_P2P_CLIENT:
1346 type = NL80211_IFTYPE_STATION;
1347 sdata->vif.type = type;
1348 sdata->vif.p2p = true;
1349 /* fall through */
05c914fe 1350 case NL80211_IFTYPE_STATION:
ad2d223a 1351 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1352 ieee80211_sta_setup_sdata(sdata);
472dbc45 1353 break;
46900298 1354 case NL80211_IFTYPE_ADHOC:
ad2d223a 1355 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1356 ieee80211_ibss_setup_sdata(sdata);
1357 break;
05c914fe 1358 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1359 if (ieee80211_vif_is_mesh(&sdata->vif))
1360 ieee80211_mesh_init_sdata(sdata);
1361 break;
05c914fe 1362 case NL80211_IFTYPE_MONITOR:
75636525 1363 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1364 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1365 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1366 MONITOR_FLAG_OTHER_BSS;
1367 break;
05c914fe 1368 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1369 sdata->vif.bss_conf.bssid = NULL;
1370 break;
05c914fe 1371 case NL80211_IFTYPE_AP_VLAN:
98104fde 1372 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1373 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1374 break;
05c914fe 1375 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1376 case NUM_NL80211_IFTYPES:
75636525
JB		 1377 BUG();
1378 break;
1379 }
1380
1381 ieee80211_debugfs_add_netdev(sdata);
1382}
1383
34d4bc4d
JB		 1384static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1385 enum nl80211_iftype type)
1386{
1387 struct ieee80211_local *local = sdata->local;
1388 int ret, err;
2ca27bcf
JB		 1389 enum nl80211_iftype internal_type = type;
1390 bool p2p = false;
34d4bc4d
JB		 1391
1392 ASSERT_RTNL();
1393
1394 if (!local->ops->change_interface)
1395 return -EBUSY;
1396
1397 switch (sdata->vif.type) {
1398 case NL80211_IFTYPE_AP:
1399 case NL80211_IFTYPE_STATION:
1400 case NL80211_IFTYPE_ADHOC:
1401 /*
1402 * Could maybe also all others here?
1403 * Just not sure how that interacts
1404 * with the RX/config path e.g. for
1405 * mesh.
1406 */
1407 break;
1408 default:
1409 return -EBUSY;
1410 }
1411
1412 switch (type) {
1413 case NL80211_IFTYPE_AP:
1414 case NL80211_IFTYPE_STATION:
1415 case NL80211_IFTYPE_ADHOC:
1416 /*
1417 * Could probably support everything
1418 * but WDS here (WDS do_open can fail
1419 * under memory pressure, which this
1420 * code isn't prepared to handle).
1421 */
1422 break;
2ca27bcf
JB		 1423 case NL80211_IFTYPE_P2P_CLIENT:
1424 p2p = true;
1425 internal_type = NL80211_IFTYPE_STATION;
1426 break;
1427 case NL80211_IFTYPE_P2P_GO:
1428 p2p = true;
1429 internal_type = NL80211_IFTYPE_AP;
1430 break;
34d4bc4d
JB		 1431 default:
1432 return -EBUSY;
1433 }
1434
2ca27bcf 1435 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1436 if (ret)
1437 return ret;
1438
1439 ieee80211_do_stop(sdata, false);
1440
f142c6b9 1441 ieee80211_teardown_sdata(sdata);
34d4bc4d 1442
2ca27bcf 1443 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1444 if (ret)
a9865538 1445 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1446
3a25a8c8
JB		 1447 /*
1448 * Ignore return value here, there's not much we can do since
1449 * the driver changed the interface type internally already.
1450 * The warnings will hopefully make driver authors fix it :-)
1451 */
a9865538 1452 ieee80211_check_queues(sdata, type);
3a25a8c8 1453
34d4bc4d
JB		 1454 ieee80211_setup_sdata(sdata, type);
1455
f142c6b9 1456 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1457 WARN(err, "type change: do_open returned %d", err);
1458
1459 return ret;
1460}
1461
f3947e2d 1462int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1463 enum nl80211_iftype type)
75636525 1464{
34d4bc4d
JB		 1465 int ret;
1466
f3947e2d
JB		 1467 ASSERT_RTNL();
1468
2ca27bcf 1469 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1470 return 0;
1471
34d4bc4d
JB		 1472 if (ieee80211_sdata_running(sdata)) {
1473 ret = ieee80211_runtime_change_iftype(sdata, type);
1474 if (ret)
1475 return ret;
1476 } else {
1477 /* Purge and reset type-dependent state. */
f142c6b9 1478 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1479 ieee80211_setup_sdata(sdata, type);
1480 }
75636525
JB		 1481
1482 /* reset some values that shouldn't be kept across type changes */
75636525 1483 sdata->drop_unencrypted = 0;
9bc383de
JB		 1484 if (type == NL80211_IFTYPE_STATION)
1485 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1486
1487 return 0;
f0706e82
JB		 1488}
1489
fa9029f8 1490static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1491 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1492{
1493 struct ieee80211_sub_if_data *sdata;
1494 u64 mask, start, addr, val, inc;
1495 u8 *m;
1496 u8 tmp_addr[ETH_ALEN];
1497 int i;
1498
1499 /* default ... something at least */
f142c6b9 1500 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1501
1502 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1503 local->hw.wiphy->n_addresses <= 1)
1504 return;
1505
fa9029f8
JB		 1506 mutex_lock(&local->iflist_mtx);
1507
1508 switch (type) {
1509 case NL80211_IFTYPE_MONITOR:
1510 /* doesn't matter */
1511 break;
1512 case NL80211_IFTYPE_WDS:
1513 case NL80211_IFTYPE_AP_VLAN:
1514 /* match up with an AP interface */
1515 list_for_each_entry(sdata, &local->interfaces, list) {
1516 if (sdata->vif.type != NL80211_IFTYPE_AP)
1517 continue;
f142c6b9 1518 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1519 break;
1520 }
1521 /* keep default if no AP interface present */
1522 break;
6d71117a
JB		 1523 case NL80211_IFTYPE_P2P_CLIENT:
1524 case NL80211_IFTYPE_P2P_GO:
1525 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1526 list_for_each_entry(sdata, &local->interfaces, list) {
1527 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1528 continue;
1529 if (!ieee80211_sdata_running(sdata))
1530 continue;
1531 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1532 goto out_unlock;
1533 }
1534 }
1535 /* otherwise fall through */
fa9029f8
JB		 1536 default:
1537 /* assign a new address if possible -- try n_addresses first */
1538 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1539 bool used = false;
1540
1541 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1542 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1543 sdata->vif.addr)) {
fa9029f8
JB		 1544 used = true;
1545 break;
1546 }
1547 }
1548
1549 if (!used) {
f142c6b9 1550 memcpy(perm_addr,
fa9029f8
JB		 1551 local->hw.wiphy->addresses[i].addr,
1552 ETH_ALEN);
1553 break;
1554 }
1555 }
1556
1557 /* try mask if available */
1558 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1559 break;
1560
1561 m = local->hw.wiphy->addr_mask;
1562 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1563 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1564 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1565
1566 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1567 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1568 pr_info("not contiguous\n");
fa9029f8
JB		 1569 break;
1570 }
1571
ac20976d
HS		 1572 /*
1573 * Pick address of existing interface in case user changed
1574 * MAC address manually, default to perm_addr.
1575 */
fa9029f8 1576 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1577 list_for_each_entry(sdata, &local->interfaces, list) {
1578 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1579 continue;
1580 m = sdata->vif.addr;
1581 break;
1582 }
fa9029f8
JB		 1583 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1584 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1585 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1586
1587 inc = 1ULL<<__ffs64(mask);
1588 val = (start & mask);
1589 addr = (start & ~mask) | (val & mask);
1590 do {
1591 bool used = false;
1592
1593 tmp_addr[5] = addr >> 0*8;
1594 tmp_addr[4] = addr >> 1*8;
1595 tmp_addr[3] = addr >> 2*8;
1596 tmp_addr[2] = addr >> 3*8;
1597 tmp_addr[1] = addr >> 4*8;
1598 tmp_addr[0] = addr >> 5*8;
1599
1600 val += inc;
1601
1602 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1603 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1604 used = true;
1605 break;
1606 }
1607 }
1608
1609 if (!used) {
f142c6b9 1610 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1611 break;
1612 }
1613 addr = (start & ~mask) | (val & mask);
1614 } while (addr != start);
1615
1616 break;
1617 }
1618
6d71117a 1619 out_unlock:
fa9029f8
JB		 1620 mutex_unlock(&local->iflist_mtx);
1621}
1622
3e122be0 1623int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1624 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1625 struct vif_params *params)
f0706e82 1626{
f142c6b9 1627 struct net_device *ndev = NULL;
f0706e82 1628 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1629 int ret, i;
ded81f6b 1630 int txqs = 1;
f0706e82
JB		 1631
1632 ASSERT_RTNL();
75636525 1633
f142c6b9
JB		 1634 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1635 struct wireless_dev *wdev;
1636
1637 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1638 GFP_KERNEL);
1639 if (!sdata)
1640 return -ENOMEM;
1641 wdev = &sdata->wdev;
1642
1643 sdata->dev = NULL;
1644 strlcpy(sdata->name, name, IFNAMSIZ);
1645 ieee80211_assign_perm_addr(local, wdev->address, type);
1646 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1647 } else {
1648 if (local->hw.queues >= IEEE80211_NUM_ACS)
1649 txqs = IEEE80211_NUM_ACS;
1650
c835a677
TG		 1651 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1652 name, NET_NAME_UNKNOWN,
1653 ieee80211_if_setup, txqs, 1);
f142c6b9
JB		 1654 if (!ndev)
1655 return -ENOMEM;
1656 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1657
1658 ndev->needed_headroom = local->tx_headroom +
1659 4*6 /* four MAC addresses */
1660 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1661 + 6 /* mesh */
1662 + 8 /* rfc1042/bridge tunnel */
1663 - ETH_HLEN /* ethernet hard_header_len */
1664 + IEEE80211_ENCRYPT_HEADROOM;
1665 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1666
1667 ret = dev_alloc_name(ndev, ndev->name);
1668 if (ret < 0) {
1669 free_netdev(ndev);
1670 return ret;
1671 }
1672
1673 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1674 if (params && is_valid_ether_addr(params->macaddr))
1675 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1676 else
1677 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1678 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1679
1680 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1681 sdata = netdev_priv(ndev);
1682 ndev->ieee80211_ptr = &sdata->wdev;
1683 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1684 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1685
1686 sdata->dev = ndev;
1687 }
75636525
JB		 1688
1689 /* initialise type-independent data */
f0706e82 1690 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1691 sdata->local = local;
75636525
JB		 1692
1693 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1694 skb_queue_head_init(&sdata->fragments[i].skb_list);
1695
1696 INIT_LIST_HEAD(&sdata->key_list);
1697
164eb02d
SW		 1698 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1699 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1700 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1701 ieee80211_delayed_tailroom_dec);
97f97b1f 1702
37eb0b16
JM		 1703 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1704 struct ieee80211_supported_band *sband;
1705 sband = local->hw.wiphy->bands[i];
1706 sdata->rc_rateidx_mask[i] =
1707 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1708 if (sband)
1709 memcpy(sdata->rc_rateidx_mcs_mask[i],
1710 sband->ht_cap.mcs.rx_mask,
1711 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1712 else
1713 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1714 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1715 }
75636525 1716
3a25a8c8
JB		 1717 ieee80211_set_default_queues(sdata);
1718
1ea6f9c0
JB		 1719 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1720 sdata->user_power_level = local->user_power_level;
1721
2475b1cc
MS		 1722 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1723
75636525
JB		 1724 /* setup type-dependent data */
1725 ieee80211_setup_sdata(sdata, type);
f0706e82 1726
f142c6b9
JB		 1727 if (ndev) {
1728 if (params) {
1729 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1730 if (type == NL80211_IFTYPE_STATION)
1731 sdata->u.mgd.use_4addr = params->use_4addr;
1732 }
9bc383de 1733
f142c6b9 1734 ndev->features |= local->hw.netdev_features;
72d78728 1735
b7ffbd7e
JB		 1736 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1737
f142c6b9
JB		 1738 ret = register_netdevice(ndev);
1739 if (ret) {
1740 free_netdev(ndev);
1741 return ret;
1742 }
1743 }
f0706e82 1744
c771c9d8 1745 mutex_lock(&local->iflist_mtx);
79010420 1746 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1747 mutex_unlock(&local->iflist_mtx);
79010420 1748
84efbb84
JB		 1749 if (new_wdev)
1750 *new_wdev = &sdata->wdev;
f0706e82 1751
f0706e82 1752 return 0;
f0706e82
JB		 1753}
1754
f698d856 1755void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1756{
f0706e82 1757 ASSERT_RTNL();
11a843b7 1758
c771c9d8 1759 mutex_lock(&sdata->local->iflist_mtx);
75636525 1760 list_del_rcu(&sdata->list);
c771c9d8
JB		 1761 mutex_unlock(&sdata->local->iflist_mtx);
1762
75636525 1763 synchronize_rcu();
f142c6b9
JB		 1764
1765 if (sdata->dev) {
1766 unregister_netdevice(sdata->dev);
1767 } else {
1768 cfg80211_unregister_wdev(&sdata->wdev);
1769 kfree(sdata);
1770 }
1771}
1772
1773void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1774{
1775 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1776 return;
1777 ieee80211_do_stop(sdata, true);
1778 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1779}
1780
75636525
JB		 1781/*
1782 * Remove all interfaces, may only be called at hardware unregistration
1783 * time because it doesn't do RCU-safe list removals.
1784 */
1785void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1786{
75636525 1787 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1788 LIST_HEAD(unreg_list);
f142c6b9 1789 LIST_HEAD(wdev_list);
f0706e82
JB		 1790
1791 ASSERT_RTNL();
1792
c8aa22db
JB		 1793 /*
1794 * Close all AP_VLAN interfaces first, as otherwise they
1795 * might be closed while the AP interface they belong to
1796 * is closed, causing unregister_netdevice_many() to crash.
1797 */
1798 list_for_each_entry(sdata, &local->interfaces, list)
1799 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1800 dev_close(sdata->dev);
1801
efe117ab 1802 mutex_lock(&local->iflist_mtx);
75636525
JB		 1803 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1804 list_del(&sdata->list);
c771c9d8 1805
f142c6b9
JB		 1806 if (sdata->dev)
1807 unregister_netdevice_queue(sdata->dev, &unreg_list);
1808 else
1809 list_add(&sdata->list, &wdev_list);
f0706e82 1810 }
efe117ab
ED		 1811 mutex_unlock(&local->iflist_mtx);
1812 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1813
1814 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1815 list_del(&sdata->list);
1816 cfg80211_unregister_wdev(&sdata->wdev);
1817 kfree(sdata);
1818 }
f0706e82 1819}
5cff20e6 1820
47846c9b 1821static int netdev_notify(struct notifier_block *nb,
351638e7 1822 unsigned long state, void *ptr)
47846c9b 1823{
351638e7 1824 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1825 struct ieee80211_sub_if_data *sdata;
1826
1827 if (state != NETDEV_CHANGENAME)
8bd811aa 1828 return NOTIFY_DONE;
47846c9b
JB		 1829
1830 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1831 return NOTIFY_DONE;
47846c9b
JB		 1832
1833 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1834 return NOTIFY_DONE;
47846c9b
JB		 1835
1836 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1837 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1838 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1839
1840 return NOTIFY_OK;
47846c9b
JB		 1841}
1842
1843static struct notifier_block mac80211_netdev_notifier = {
1844 .notifier_call = netdev_notify,
1845};
1846
1847int ieee80211_iface_init(void)
1848{
1849 return register_netdevice_notifier(&mac80211_netdev_notifier);
1850}
1851
1852void ieee80211_iface_exit(void)
1853{
1854 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1855}
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