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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
708d50ed
AB		 330 if (iftype == NL80211_IFTYPE_NAN)
331 return 0;
332
a9865538 333 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 334 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
335 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
336 IEEE80211_INVAL_HW_QUEUE))
337 return -EINVAL;
338 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
339 n_queues))
340 return -EINVAL;
341 }
3a25a8c8
JB		 342 }
343
a9865538
JB		 344 if ((iftype != NL80211_IFTYPE_AP &&
345 iftype != NL80211_IFTYPE_P2P_GO &&
346 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 347 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 348 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
349 return 0;
350 }
351
352 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
353 return -EINVAL;
354
355 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
356 return -EINVAL;
357
358 return 0;
359}
360
85416a4f
CL		 361void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
362 const int offset)
363{
364 struct ieee80211_local *local = sdata->local;
d8212184 365 u32 flags = sdata->u.mntr.flags;
85416a4f
CL		 366
367#define ADJUST(_f, _s) do { \
368 if (flags & MONITOR_FLAG_##_f) \
369 local->fif_##_s += offset; \
370 } while (0)
371
372 ADJUST(FCSFAIL, fcsfail);
373 ADJUST(PLCPFAIL, plcpfail);
374 ADJUST(CONTROL, control);
375 ADJUST(CONTROL, pspoll);
376 ADJUST(OTHER_BSS, other_bss);
377
378#undef ADJUST
379}
380
3a25a8c8
JB		 381static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
382{
383 struct ieee80211_local *local = sdata->local;
384 int i;
385
386 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 387 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 388 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 389 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 390 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 391 else
392 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 393 }
394 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
395}
396
3c3e21e7 397int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 398{
399 struct ieee80211_sub_if_data *sdata;
8b305780 400 int ret;
4b6f1dd6 401
30686bf7 402 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 403 return 0;
404
8b305780 405 ASSERT_RTNL();
685fb72b 406
4b6f1dd6 407 if (local->monitor_sdata)
8b305780 408 return 0;
4b6f1dd6
JB		 409
410 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 411 if (!sdata)
412 return -ENOMEM;
4b6f1dd6
JB		 413
414 /* set up data */
415 sdata->local = local;
416 sdata->vif.type = NL80211_IFTYPE_MONITOR;
417 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
418 wiphy_name(local->hw.wiphy));
34171dc0 419 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 420
2475b1cc
MS		 421 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
422
3a25a8c8
JB		 423 ieee80211_set_default_queues(sdata);
424
4b6f1dd6
JB		 425 ret = drv_add_interface(local, sdata);
426 if (WARN_ON(ret)) {
427 /* ok .. stupid driver, it asked for this! */
428 kfree(sdata);
8b305780 429 return ret;
4b6f1dd6
JB		 430 }
431
a9865538 432 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 433 if (ret) {
434 kfree(sdata);
8b305780 435 return ret;
3a25a8c8
JB		 436 }
437
fab57a6c
JB		 438 mutex_lock(&local->iflist_mtx);
439 rcu_assign_pointer(local->monitor_sdata, sdata);
440 mutex_unlock(&local->iflist_mtx);
441
34a3740d 442 mutex_lock(&local->mtx);
4bf88530 443 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 444 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 445 mutex_unlock(&local->mtx);
55de908a 446 if (ret) {
fab57a6c 447 mutex_lock(&local->iflist_mtx);
0c2bef46 448 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 449 mutex_unlock(&local->iflist_mtx);
450 synchronize_net();
55de908a
JB		 451 drv_remove_interface(local, sdata);
452 kfree(sdata);
8b305780 453 return ret;
55de908a
JB		 454 }
455
42bd20d9
AE		 456 skb_queue_head_init(&sdata->skb_queue);
457 INIT_WORK(&sdata->work, ieee80211_iface_work);
458
8b305780 459 return 0;
4b6f1dd6
JB		 460}
461
3c3e21e7 462void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 463{
464 struct ieee80211_sub_if_data *sdata;
465
30686bf7 466 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 467 return;
468
8b305780
JB		 469 ASSERT_RTNL();
470
685fb72b 471 mutex_lock(&local->iflist_mtx);
4b6f1dd6 472
685fb72b
JB		 473 sdata = rcu_dereference_protected(local->monitor_sdata,
474 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 475 if (!sdata) {
476 mutex_unlock(&local->iflist_mtx);
477 return;
478 }
4b6f1dd6 479
0c2bef46 480 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 481 mutex_unlock(&local->iflist_mtx);
482
4b6f1dd6
JB		 483 synchronize_net();
484
34a3740d 485 mutex_lock(&local->mtx);
55de908a 486 ieee80211_vif_release_channel(sdata);
34a3740d 487 mutex_unlock(&local->mtx);
55de908a 488
4b6f1dd6
JB		 489 drv_remove_interface(local, sdata);
490
491 kfree(sdata);
492}
493
34d4bc4d
JB		 494/*
495 * NOTE: Be very careful when changing this function, it must NOT return
496 * an error on interface type changes that have been pre-checked, so most
497 * checks should be in ieee80211_check_concurrent_iface.
498 */
f142c6b9 499int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 500{
f142c6b9
JB		 501 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
502 struct net_device *dev = wdev->netdev;
87490f6d
JB		 503 struct ieee80211_local *local = sdata->local;
504 struct sta_info *sta;
505 u32 changed = 0;
506 int res;
507 u32 hw_reconf_flags = 0;
508
0d143fe1
JB		 509 switch (sdata->vif.type) {
510 case NL80211_IFTYPE_WDS:
511 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
512 return -ENOLINK;
513 break;
665c93a9
JB		 514 case NL80211_IFTYPE_AP_VLAN: {
515 struct ieee80211_sub_if_data *master;
516
0d143fe1
JB		 517 if (!sdata->bss)
518 return -ENOLINK;
665c93a9 519
4e141dad 520 mutex_lock(&local->mtx);
0d143fe1 521 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 522 mutex_unlock(&local->mtx);
665c93a9
JB		 523
524 master = container_of(sdata->bss,
525 struct ieee80211_sub_if_data, u.ap);
526 sdata->control_port_protocol =
527 master->control_port_protocol;
528 sdata->control_port_no_encrypt =
529 master->control_port_no_encrypt;
1351c5d3
JB		 530 sdata->vif.cab_queue = master->vif.cab_queue;
531 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
532 sizeof(sdata->vif.hw_queue));
2967e031 533 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 534
535 mutex_lock(&local->key_mtx);
536 sdata->crypto_tx_tailroom_needed_cnt +=
537 master->crypto_tx_tailroom_needed_cnt;
538 mutex_unlock(&local->key_mtx);
539
0d143fe1 540 break;
665c93a9 541 }
0d143fe1
JB		 542 case NL80211_IFTYPE_AP:
543 sdata->bss = &sdata->u.ap;
544 break;
545 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 546 case NL80211_IFTYPE_STATION:
547 case NL80211_IFTYPE_MONITOR:
548 case NL80211_IFTYPE_ADHOC:
f142c6b9 549 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 550 case NL80211_IFTYPE_OCB:
cb3b7d87 551 case NL80211_IFTYPE_NAN:
0d143fe1
JB		 552 /* no special treatment */
553 break;
554 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 555 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 556 case NL80211_IFTYPE_P2P_CLIENT:
557 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 558 /* cannot happen */
559 WARN_ON(1);
560 break;
561 }
562
563 if (local->open_count == 0) {
24487981 564 res = drv_start(local);
0d143fe1
JB		 565 if (res)
566 goto err_del_bss;
e8975581
JB		 567 /* we're brought up, everything changes */
568 hw_reconf_flags = ~0;
1f87f7d3 569 ieee80211_led_radio(local, true);
67408c8c
JB		 570 ieee80211_mod_tpt_led_trig(local,
571 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 572 }
573
574 /*
bf533e0b
JB		 575 * Copy the hopefully now-present MAC address to
576 * this interface, if it has the special null one.
0d143fe1 577 */
f142c6b9 578 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 579 memcpy(dev->dev_addr,
580 local->hw.wiphy->perm_addr,
581 ETH_ALEN);
582 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
583
584 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 585 res = -EADDRNOTAVAIL;
586 goto err_stop;
0adc23f5 587 }
0d143fe1
JB		 588 }
589
0d143fe1
JB		 590 switch (sdata->vif.type) {
591 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 592 /* no need to tell driver, but set carrier and chanctx */
593 if (rtnl_dereference(sdata->bss->beacon)) {
594 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 595 netif_carrier_on(dev);
4d76d21b 596 } else {
3edaf3e6 597 netif_carrier_off(dev);
4d76d21b 598 }
0d143fe1
JB		 599 break;
600 case NL80211_IFTYPE_MONITOR:
d8212184 601 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 602 local->cooked_mntrs++;
603 break;
604 }
605
d8212184 606 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
31eba5bc
FF		 607 res = drv_add_interface(local, sdata);
608 if (res)
609 goto err_stop;
610 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 611 res = ieee80211_add_virtual_monitor(local);
612 if (res)
613 goto err_stop;
614 }
615
0d143fe1
JB		 616 /* must be before the call to ieee80211_configure_filter */
617 local->monitors++;
e8975581 618 if (local->monitors == 1) {
0869aea0
JB		 619 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
620 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 621 }
0d143fe1 622
85416a4f 623 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 624 ieee80211_configure_filter(local);
801d929c
FF		 625 mutex_lock(&local->mtx);
626 ieee80211_recalc_idle(local);
627 mutex_unlock(&local->mtx);
53e9b1de
DG		 628
629 netif_carrier_on(dev);
0d143fe1 630 break;
0d143fe1 631 default:
34d4bc4d 632 if (coming_up) {
075e0847
JB		 633 ieee80211_del_virtual_monitor(local);
634
7b7eab6f 635 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 636 if (res)
637 goto err_stop;
a9865538
JB		 638 res = ieee80211_check_queues(sdata,
639 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 640 if (res)
641 goto err_del_interface;
34d4bc4d 642 }
0d143fe1 643
29cbe68c 644 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 645 local->fif_pspoll++;
7be5086d 646 local->fif_probe_req++;
e3b90ca2 647
e3b90ca2 648 ieee80211_configure_filter(local);
7be5086d
JB		 649 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
650 local->fif_probe_req++;
a3c9aa51 651 }
e3b90ca2 652
708d50ed
AB		 653 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
654 sdata->vif.type != NL80211_IFTYPE_NAN)
f142c6b9 655 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 656 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 657
c405c629
JB		 658 switch (sdata->vif.type) {
659 case NL80211_IFTYPE_STATION:
660 case NL80211_IFTYPE_ADHOC:
661 case NL80211_IFTYPE_AP:
662 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 663 case NL80211_IFTYPE_OCB:
0d143fe1 664 netif_carrier_off(dev);
c405c629 665 break;
1411af15 666 case NL80211_IFTYPE_WDS:
f142c6b9 667 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 668 case NL80211_IFTYPE_NAN:
1411af15 669 break;
c405c629 670 default:
a2310824
JB		 671 /* not reached */
672 WARN_ON(1);
c405c629 673 }
59034591
EP		 674
675 /*
cec66283 676 * Set default queue parameters so drivers don't
59034591 677 * need to initialise the hardware if the hardware
cec66283
JB		 678 * doesn't start up with sane defaults.
679 * Enable QoS for anything but station interfaces.
59034591 680 */
cec66283
JB		 681 ieee80211_set_wmm_default(sdata, true,
682 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 683 }
684
2d2080c3
JB		 685 set_bit(SDATA_STATE_RUNNING, &sdata->state);
686
0d143fe1
JB		 687 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
688 /* Create STA entry for the WDS peer */
689 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
690 GFP_KERNEL);
691 if (!sta) {
692 res = -ENOMEM;
693 goto err_del_interface;
694 }
695
83d5cc01
JB		 696 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
697 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
698 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 699
700 res = sta_info_insert(sta);
701 if (res) {
702 /* STA has been freed */
703 goto err_del_interface;
704 }
1be7fe8d
BJ		 705
706 rate_control_rate_init(sta);
1411af15 707 netif_carrier_on(dev);
f142c6b9
JB		 708 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
709 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 710 }
711
0d143fe1
JB		 712 /*
713 * set_multicast_list will be invoked by the networking core
714 * which will check whether any increments here were done in
715 * error and sync them down to the hardware as filter flags.
716 */
717 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
718 atomic_inc(&local->iff_allmultis);
719
34d4bc4d
JB		 720 if (coming_up)
721 local->open_count++;
722
59034591 723 if (hw_reconf_flags)
e8975581 724 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 725
4a733ef1 726 ieee80211_recalc_ps(local);
965bedad 727
2b436312
JB		 728 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
729 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
730 /* XXX: for AP_VLAN, actually track AP queues */
731 netif_tx_start_all_queues(dev);
732 } else if (dev) {
2b730daa
JB		 733 unsigned long flags;
734 int n_acs = IEEE80211_NUM_ACS;
735 int ac;
736
737 if (local->hw.queues < IEEE80211_NUM_ACS)
738 n_acs = 1;
739
740 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
741 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
742 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
743 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
744 for (ac = 0; ac < n_acs; ac++) {
745 int ac_queue = sdata->vif.hw_queue[ac];
746
747 if (local->queue_stop_reasons[ac_queue] == 0 &&
748 skb_queue_empty(&local->pending[ac_queue]))
749 netif_start_subqueue(dev, ac);
750 }
751 }
752 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
753 }
0d143fe1
JB		 754
755 return 0;
756 err_del_interface:
7b7eab6f 757 drv_remove_interface(local, sdata);
0d143fe1 758 err_stop:
24487981
JB		 759 if (!local->open_count)
760 drv_stop(local);
0d143fe1
JB		 761 err_del_bss:
762 sdata->bss = NULL;
4e141dad
MK		 763 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
764 mutex_lock(&local->mtx);
0d143fe1 765 list_del(&sdata->u.vlan.list);
4e141dad
MK		 766 mutex_unlock(&local->mtx);
767 }
4d6c36fa 768 /* might already be clear but that doesn't matter */
2d2080c3 769 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 770 return res;
771}
772
34d4bc4d 773static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 774{
775 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 776 int err;
777
778 /* fail early if user set an invalid address */
2fcf2824 779 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 780 return -EADDRNOTAVAIL;
781
782 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
783 if (err)
784 return err;
785
f142c6b9 786 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 787}
788
789static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
790 bool going_down)
791{
0d143fe1 792 struct ieee80211_local *local = sdata->local;
fa962b92 793 struct fq *fq = &local->fq;
5061b0c2
JB		 794 unsigned long flags;
795 struct sk_buff *skb, *tmp;
e8975581 796 u32 hw_reconf_flags = 0;
09f4114e 797 int i, flushed;
397a7a24 798 struct ps_data *ps;
d2859df5 799 struct cfg80211_chan_def chandef;
46238845 800 bool cancel_scan;
167e33f4 801 struct cfg80211_nan_func *func;
0d143fe1 802
c29acf20
RM		 803 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
804
46238845
JB		 805 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
806 if (cancel_scan)
352ffad6
BC		 807 ieee80211_scan_cancel(local);
808
0d143fe1
JB		 809 /*
810 * Stop TX on this interface first.
811 */
f142c6b9
JB		 812 if (sdata->dev)
813 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 814
c8f994ee 815 ieee80211_roc_purge(local, sdata);
af6b6374 816
8ffcc704
EG		 817 switch (sdata->vif.type) {
818 case NL80211_IFTYPE_STATION:
572078be 819 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 820 break;
821 case NL80211_IFTYPE_ADHOC:
cd7760e6 822 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 823 break;
824 case NL80211_IFTYPE_AP:
825 cancel_work_sync(&sdata->u.ap.request_smps_work);
826 break;
827 default:
828 break;
829 }
cd7760e6 830
0d143fe1
JB		 831 /*
832 * Remove all stations associated with this interface.
833 *
834 * This must be done before calling ops->remove_interface()
835 * because otherwise we can later invoke ops->sta_notify()
836 * whenever the STAs are removed, and that invalidates driver
837 * assumptions about always getting a vif pointer that is valid
838 * (because if we remove a STA after ops->remove_interface()
839 * the driver will have removed the vif info already!)
840 *
5eb8f4d7
JB		 841 * In WDS mode a station must exist here and be flushed, for
842 * AP_VLANs stations may exist since there's nothing else that
843 * would have removed them, but in other modes there shouldn't
844 * be any stations.
0d143fe1 845 */
d34ba216 846 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 847 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
848 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
849 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 850
df140465 851 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 852 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
853 atomic_dec(&local->iff_allmultis);
854
7be5086d 855 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 856 local->fif_pspoll--;
7be5086d
JB		 857 local->fif_probe_req--;
858 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
859 local->fif_probe_req--;
860 }
e3b90ca2 861
f142c6b9
JB		 862 if (sdata->dev) {
863 netif_addr_lock_bh(sdata->dev);
864 spin_lock_bh(&local->filter_lock);
865 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
866 sdata->dev->addr_len);
867 spin_unlock_bh(&local->filter_lock);
868 netif_addr_unlock_bh(sdata->dev);
f142c6b9 869 }
3ac64bee 870
7cbf0ba5
VN		 871 del_timer_sync(&local->dynamic_ps_timer);
872 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 873
04ecd257 874 cancel_work_sync(&sdata->recalc_smps);
dbd72850 875 sdata_lock(sdata);
59af6928 876 mutex_lock(&local->mtx);
73da7d5b 877 sdata->vif.csa_active = false;
0c21e632
LC		 878 if (sdata->vif.type == NL80211_IFTYPE_STATION)
879 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 880 if (sdata->csa_block_tx) {
881 ieee80211_wake_vif_queues(local, sdata,
882 IEEE80211_QUEUE_STOP_REASON_CSA);
883 sdata->csa_block_tx = false;
884 }
59af6928 885 mutex_unlock(&local->mtx);
dbd72850 886 sdata_unlock(sdata);
59af6928 887
73da7d5b 888 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 889
164eb02d
SW		 890 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
891
892 if (sdata->wdev.cac_started) {
d2859df5 893 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 894 WARN_ON(local->suspended);
34a3740d 895 mutex_lock(&local->mtx);
164eb02d 896 ieee80211_vif_release_channel(sdata);
34a3740d 897 mutex_unlock(&local->mtx);
d2859df5
JD		 898 cfg80211_cac_event(sdata->dev, &chandef,
899 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 900 GFP_KERNEL);
901 }
902
0d143fe1
JB		 903 /* APs need special treatment */
904 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 905 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 906
907 /* down all dependent devices, that is VLANs */
57c9fff3 908 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 909 u.vlan.list)
910 dev_close(vlan->dev);
911 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 912 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
913 /* remove all packets in parent bc_buf pointing to this dev */
914 ps = &sdata->bss->ps;
915
916 spin_lock_irqsave(&ps->bc_buf.lock, flags);
917 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
918 if (skb->dev == sdata->dev) {
919 __skb_unlink(skb, &ps->bc_buf);
920 local->total_ps_buffered--;
921 ieee80211_free_txskb(&local->hw, skb);
922 }
923 }
924 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 925 }
926
34d4bc4d
JB		 927 if (going_down)
928 local->open_count--;
0d143fe1
JB		 929
930 switch (sdata->vif.type) {
931 case NL80211_IFTYPE_AP_VLAN:
4e141dad 932 mutex_lock(&local->mtx);
0d143fe1 933 list_del(&sdata->u.vlan.list);
4e141dad 934 mutex_unlock(&local->mtx);
0c2bef46 935 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 936 /* see comment in the default case below */
937 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 938 /* no need to tell driver */
939 break;
940 case NL80211_IFTYPE_MONITOR:
d8212184 941 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
0d143fe1
JB		 942 local->cooked_mntrs--;
943 break;
944 }
945
946 local->monitors--;
e8975581 947 if (local->monitors == 0) {
0869aea0
JB		 948 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
949 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 950 }
0d143fe1 951
85416a4f 952 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 953 break;
167e33f4
AB		 954 case NL80211_IFTYPE_NAN:
955 /* clean all the functions */
956 spin_lock_bh(&sdata->u.nan.func_lock);
957
958 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
959 idr_remove(&sdata->u.nan.function_inst_ids, i);
960 cfg80211_free_nan_func(func);
961 }
962 idr_destroy(&sdata->u.nan.function_inst_ids);
963
964 spin_unlock_bh(&sdata->u.nan.func_lock);
965 break;
f142c6b9
JB		 966 case NL80211_IFTYPE_P2P_DEVICE:
967 /* relies on synchronize_rcu() below */
0c2bef46 968 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 969 /* fall through */
0d143fe1 970 default:
0b7dff4f 971 cancel_work_sync(&sdata->work);
35f20c14
JB		 972 /*
973 * When we get here, the interface is marked down.
7907c7d3 974 * Free the remaining keys, if there are any
10b68487
FF		 975 * (which can happen in AP mode if userspace sets
976 * keys before the interface is operating, and maybe
977 * also in WDS mode)
75de9113 978 *
7907c7d3
JB		 979 * Force the key freeing to always synchronize_net()
980 * to wait for the RX path in case it is using this
10b68487 981 * interface enqueuing frames at this very time on
75de9113 982 * another CPU.
35f20c14 983 */
7907c7d3 984 ieee80211_free_keys(sdata, true);
1861b845 985 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 986 }
987
988 sdata->bss = NULL;
989
5061b0c2
JB		 990 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
991 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
992 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
993 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
994 if (info->control.vif == &sdata->vif) {
995 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 996 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 997 }
998 }
999 }
1000 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 1001
ba8c3d6f
FF		 1002 if (sdata->vif.txq) {
1003 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
1004
fa962b92
MK		 1005 spin_lock_bh(&fq->lock);
1006 ieee80211_txq_purge(local, txqi);
1007 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1008 }
1009
b2c0958b
JB		 1010 if (local->open_count == 0)
1011 ieee80211_clear_tx_pending(local);
1012
1013 /*
1014 * If the interface goes down while suspended, presumably because
1015 * the device was unplugged and that happens before our resume,
1016 * then the driver is already unconfigured and the remainder of
1017 * this function isn't needed.
1018 * XXX: what about WoWLAN? If the device has software state, e.g.
1019 * memory allocated, it might expect teardown commands from
1020 * mac80211 here?
1021 */
1022 if (local->suspended) {
1023 WARN_ON(local->wowlan);
1024 WARN_ON(rtnl_dereference(local->monitor_sdata));
1025 return;
1026 }
1027
1028 switch (sdata->vif.type) {
1029 case NL80211_IFTYPE_AP_VLAN:
1030 break;
1031 case NL80211_IFTYPE_MONITOR:
1032 if (local->monitors == 0)
1033 ieee80211_del_virtual_monitor(local);
1034
1035 mutex_lock(&local->mtx);
1036 ieee80211_recalc_idle(local);
1037 mutex_unlock(&local->mtx);
31eba5bc 1038
d8212184 1039 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
31eba5bc
FF		 1040 break;
1041
1042 /* fall through */
b2c0958b
JB		 1043 default:
1044 if (going_down)
1045 drv_remove_interface(local, sdata);
1046 }
1047
4a733ef1 1048 ieee80211_recalc_ps(local);
b2c0958b 1049
46238845
JB		 1050 if (cancel_scan)
1051 flush_delayed_work(&local->scan_work);
1052
b2c0958b
JB		 1053 if (local->open_count == 0) {
1054 ieee80211_stop_device(local);
1055
1056 /* no reconfiguring after stop! */
1057 return;
1058 }
1059
1060 /* do after stop to avoid reconfiguring when we stop anyway */
1061 ieee80211_configure_filter(local);
1062 ieee80211_hw_config(local, hw_reconf_flags);
1063
1064 if (local->monitors == local->open_count)
075e0847 1065 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1066}
1067
1068static int ieee80211_stop(struct net_device *dev)
1069{
1070 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1071
1072 ieee80211_do_stop(sdata, true);
5061b0c2 1073
0d143fe1
JB		 1074 return 0;
1075}
1076
1077static void ieee80211_set_multicast_list(struct net_device *dev)
1078{
0d143fe1 1079 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1080 struct ieee80211_local *local = sdata->local;
df140465 1081 int allmulti, sdata_allmulti;
0d143fe1
JB		 1082
1083 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1084 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1085
1086 if (allmulti != sdata_allmulti) {
1087 if (dev->flags & IFF_ALLMULTI)
1088 atomic_inc(&local->iff_allmultis);
1089 else
1090 atomic_dec(&local->iff_allmultis);
1091 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1092 }
1093
3b8d81e0 1094 spin_lock_bh(&local->filter_lock);
22bedad3 1095 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1096 spin_unlock_bh(&local->filter_lock);
3ac64bee 1097 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1098}
1099
75636525
JB		 1100/*
1101 * Called when the netdev is removed or, by the code below, before
1102 * the interface type changes.
1103 */
f142c6b9 1104static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1105{
1106 int i;
1107
75636525 1108 /* free extra data */
7907c7d3 1109 ieee80211_free_keys(sdata, false);
75636525 1110
aee14ceb
JM		 1111 ieee80211_debugfs_remove_netdev(sdata);
1112
f0706e82 1113 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1114 __skb_queue_purge(&sdata->fragments[i].skb_list);
1115 sdata->fragment_next = 0;
11a843b7 1116
b9dcf712 1117 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1118 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1119}
1120
f142c6b9
JB		 1121static void ieee80211_uninit(struct net_device *dev)
1122{
1123 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1124}
1125
cf0277e7 1126static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1127 struct sk_buff *skb,
99932d4f
DB		 1128 void *accel_priv,
1129 select_queue_fallback_t fallback)
cf0277e7
JB		 1130{
1131 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1132}
1133
5a490510
JB		 1134static struct rtnl_link_stats64 *
1135ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1136{
1137 int i;
1138
1139 for_each_possible_cpu(i) {
1140 const struct pcpu_sw_netstats *tstats;
1141 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1142 unsigned int start;
1143
1144 tstats = per_cpu_ptr(dev->tstats, i);
1145
1146 do {
1147 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1148 rx_packets = tstats->rx_packets;
1149 tx_packets = tstats->tx_packets;
1150 rx_bytes = tstats->rx_bytes;
1151 tx_bytes = tstats->tx_bytes;
1152 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1153
1154 stats->rx_packets += rx_packets;
1155 stats->tx_packets += tx_packets;
1156 stats->rx_bytes += rx_bytes;
1157 stats->tx_bytes += tx_bytes;
1158 }
1159
1160 return stats;
1161}
1162
587e729e
JB		 1163static const struct net_device_ops ieee80211_dataif_ops = {
1164 .ndo_open = ieee80211_open,
1165 .ndo_stop = ieee80211_stop,
f142c6b9 1166 .ndo_uninit = ieee80211_uninit,
587e729e 1167 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1168 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1169 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1170 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1171 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1172 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1173};
1174
cf0277e7 1175static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1176 struct sk_buff *skb,
99932d4f
DB		 1177 void *accel_priv,
1178 select_queue_fallback_t fallback)
cf0277e7
JB		 1179{
1180 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1181 struct ieee80211_local *local = sdata->local;
1182 struct ieee80211_hdr *hdr;
1183 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1184
32c5057b 1185 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1186 return 0;
1187
1188 if (skb->len < 4 ||
b49bb574 1189 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1190 return 0; /* doesn't matter, frame will be dropped */
1191
b49bb574 1192 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1193
00e96dec 1194 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1195}
1196
587e729e
JB		 1197static const struct net_device_ops ieee80211_monitorif_ops = {
1198 .ndo_open = ieee80211_open,
1199 .ndo_stop = ieee80211_stop,
f142c6b9 1200 .ndo_uninit = ieee80211_uninit,
587e729e 1201 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1202 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1203 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1204 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1205 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1206 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1207};
1208
5a490510
JB		 1209static void ieee80211_if_free(struct net_device *dev)
1210{
1211 free_percpu(dev->tstats);
1212 free_netdev(dev);
1213}
1214
587e729e
JB		 1215static void ieee80211_if_setup(struct net_device *dev)
1216{
1217 ether_setup(dev);
550fd08c 1218 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1219 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1220 dev->destructor = ieee80211_if_free;
587e729e
JB		 1221}
1222
80a83cfc
MK		 1223static void ieee80211_if_setup_no_queue(struct net_device *dev)
1224{
1225 ieee80211_if_setup(dev);
1226 dev->priv_flags |= IFF_NO_QUEUE;
1227}
1228
1fa57d01
JB		 1229static void ieee80211_iface_work(struct work_struct *work)
1230{
1231 struct ieee80211_sub_if_data *sdata =
1232 container_of(work, struct ieee80211_sub_if_data, work);
1233 struct ieee80211_local *local = sdata->local;
1234 struct sk_buff *skb;
344eec67 1235 struct sta_info *sta;
c1475ca9 1236 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1237 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1238
1239 if (!ieee80211_sdata_running(sdata))
1240 return;
1241
fc58c47e 1242 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1243 return;
1244
4afaff17 1245 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1246 return;
1247
1248 /* first process frames */
1249 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1250 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1251
c1475ca9
JB		 1252 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1253 ra_tid = (void *)&skb->cb;
1254 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1255 ra_tid->tid);
1256 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1257 ra_tid = (void *)&skb->cb;
1258 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1259 ra_tid->tid);
08cf42e8
MK		 1260 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1261 rx_agg = (void *)&skb->cb;
1262 mutex_lock(&local->sta_mtx);
1263 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1264 if (sta)
08cf42e8 1265 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1266 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1267 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1268 false, true);
08cf42e8
MK		 1269 mutex_unlock(&local->sta_mtx);
1270 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1271 rx_agg = (void *)&skb->cb;
1272 mutex_lock(&local->sta_mtx);
1273 sta = sta_info_get_bss(sdata, rx_agg->addr);
1274 if (sta)
1275 __ieee80211_stop_rx_ba_session(sta,
1276 rx_agg->tid,
1277 WLAN_BACK_RECIPIENT, 0,
1278 false);
1279 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1280 } else if (ieee80211_is_action(mgmt->frame_control) &&
1281 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1282 int len = skb->len;
bed7ee6e 1283
a93e3644 1284 mutex_lock(&local->sta_mtx);
875ae5f6 1285 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1286 if (sta) {
1287 switch (mgmt->u.action.u.addba_req.action_code) {
1288 case WLAN_ACTION_ADDBA_REQ:
1289 ieee80211_process_addba_request(
1290 local, sta, mgmt, len);
1291 break;
1292 case WLAN_ACTION_ADDBA_RESP:
1293 ieee80211_process_addba_resp(local, sta,
1294 mgmt, len);
1295 break;
1296 case WLAN_ACTION_DELBA:
1297 ieee80211_process_delba(sdata, sta,
1298 mgmt, len);
1299 break;
1300 default:
1301 WARN_ON(1);
1302 break;
1303 }
1304 }
a93e3644 1305 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1306 } else if (ieee80211_is_action(mgmt->frame_control) &&
1307 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1308 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1309 case WLAN_VHT_ACTION_GROUPID_MGMT:
1310 ieee80211_process_mu_groups(sdata, mgmt);
1311 break;
1312 default:
1313 WARN_ON(1);
1314 break;
1315 }
344eec67
JB		 1316 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1317 struct ieee80211_hdr *hdr = (void *)mgmt;
1318 /*
1319 * So the frame isn't mgmt, but frame_control
1320 * is at the right place anyway, of course, so
1321 * the if statement is correct.
1322 *
1323 * Warn if we have other data frame types here,
1324 * they must not get here.
1325 */
1326 WARN_ON(hdr->frame_control &
1327 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1328 WARN_ON(!(hdr->seq_ctrl &
1329 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1330 /*
1331 * This was a fragment of a frame, received while
1332 * a block-ack session was active. That cannot be
1333 * right, so terminate the session.
1334 */
a93e3644 1335 mutex_lock(&local->sta_mtx);
875ae5f6 1336 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1337 if (sta) {
1338 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1339 IEEE80211_QOS_CTL_TID_MASK;
1340
1341 __ieee80211_stop_rx_ba_session(
1342 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1343 WLAN_REASON_QSTA_REQUIRE_SETUP,
1344 true);
344eec67 1345 }
a93e3644 1346 mutex_unlock(&local->sta_mtx);
bed7ee6e 1347 } else switch (sdata->vif.type) {
1fa57d01
JB		 1348 case NL80211_IFTYPE_STATION:
1349 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1350 break;
1351 case NL80211_IFTYPE_ADHOC:
1352 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1353 break;
1354 case NL80211_IFTYPE_MESH_POINT:
1355 if (!ieee80211_vif_is_mesh(&sdata->vif))
1356 break;
1357 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1358 break;
1359 default:
1360 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1361 break;
1362 }
36b3a628
JB		 1363
1364 kfree_skb(skb);
1fa57d01
JB		 1365 }
1366
1367 /* then other type-dependent work */
1368 switch (sdata->vif.type) {
1369 case NL80211_IFTYPE_STATION:
1370 ieee80211_sta_work(sdata);
1371 break;
1372 case NL80211_IFTYPE_ADHOC:
1373 ieee80211_ibss_work(sdata);
1374 break;
1375 case NL80211_IFTYPE_MESH_POINT:
1376 if (!ieee80211_vif_is_mesh(&sdata->vif))
1377 break;
1378 ieee80211_mesh_work(sdata);
1379 break;
239281f8
RL		 1380 case NL80211_IFTYPE_OCB:
1381 ieee80211_ocb_work(sdata);
1382 break;
1fa57d01
JB		 1383 default:
1384 break;
1385 }
1386}
1387
04ecd257
JB		 1388static void ieee80211_recalc_smps_work(struct work_struct *work)
1389{
1390 struct ieee80211_sub_if_data *sdata =
1391 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1392
1393 ieee80211_recalc_smps(sdata);
1394}
1fa57d01 1395
75636525
JB		 1396/*
1397 * Helper function to initialise an interface to a specific type.
1398 */
1399static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1400 enum nl80211_iftype type)
f0706e82 1401{
239281f8
RL		 1402 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1403 0xff, 0xff, 0xff};
1404
75636525
JB		 1405 /* clear type-dependent union */
1406 memset(&sdata->u, 0, sizeof(sdata->u));
1407
1408 /* and set some type-dependent values */
1409 sdata->vif.type = type;
2ca27bcf 1410 sdata->vif.p2p = false;
60719ffd 1411 sdata->wdev.iftype = type;
75636525 1412
a621fa4d
JB		 1413 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1414 sdata->control_port_no_encrypt = false;
2475b1cc 1415 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1416 sdata->vif.bss_conf.idle = true;
a621fa4d 1417
b53be792
SW		 1418 sdata->noack_map = 0;
1419
f142c6b9
JB		 1420 /* only monitor/p2p-device differ */
1421 if (sdata->dev) {
1422 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1423 sdata->dev->type = ARPHRD_ETHER;
1424 }
75636525 1425
35f20c14 1426 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1427 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1428 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1429 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1430 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1431 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1432
75636525 1433 switch (type) {
2ca27bcf
JB		 1434 case NL80211_IFTYPE_P2P_GO:
1435 type = NL80211_IFTYPE_AP;
1436 sdata->vif.type = type;
1437 sdata->vif.p2p = true;
1438 /* fall through */
05c914fe 1439 case NL80211_IFTYPE_AP:
d012a605 1440 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1441 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1442 INIT_WORK(&sdata->u.ap.request_smps_work,
1443 ieee80211_request_smps_ap_work);
ad2d223a 1444 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1445 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1446 break;
2ca27bcf
JB		 1447 case NL80211_IFTYPE_P2P_CLIENT:
1448 type = NL80211_IFTYPE_STATION;
1449 sdata->vif.type = type;
1450 sdata->vif.p2p = true;
1451 /* fall through */
05c914fe 1452 case NL80211_IFTYPE_STATION:
ad2d223a 1453 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1454 ieee80211_sta_setup_sdata(sdata);
472dbc45 1455 break;
6e0bd6c3 1456 case NL80211_IFTYPE_OCB:
239281f8
RL		 1457 sdata->vif.bss_conf.bssid = bssid_wildcard;
1458 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1459 break;
46900298 1460 case NL80211_IFTYPE_ADHOC:
ad2d223a 1461 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1462 ieee80211_ibss_setup_sdata(sdata);
1463 break;
05c914fe 1464 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1465 if (ieee80211_vif_is_mesh(&sdata->vif))
1466 ieee80211_mesh_init_sdata(sdata);
1467 break;
05c914fe 1468 case NL80211_IFTYPE_MONITOR:
75636525 1469 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1470 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
d8212184 1471 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
75636525
JB		 1472 MONITOR_FLAG_OTHER_BSS;
1473 break;
05c914fe 1474 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1475 sdata->vif.bss_conf.bssid = NULL;
1476 break;
167e33f4
AB		 1477 case NL80211_IFTYPE_NAN:
1478 idr_init(&sdata->u.nan.function_inst_ids);
1479 spin_lock_init(&sdata->u.nan.func_lock);
1480 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1481 break;
05c914fe 1482 case NL80211_IFTYPE_AP_VLAN:
98104fde 1483 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1484 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1485 break;
05c914fe 1486 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1487 case NUM_NL80211_IFTYPES:
75636525
JB		 1488 BUG();
1489 break;
1490 }
1491
1492 ieee80211_debugfs_add_netdev(sdata);
1493}
1494
34d4bc4d
JB		 1495static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1496 enum nl80211_iftype type)
1497{
1498 struct ieee80211_local *local = sdata->local;
1499 int ret, err;
2ca27bcf
JB		 1500 enum nl80211_iftype internal_type = type;
1501 bool p2p = false;
34d4bc4d
JB		 1502
1503 ASSERT_RTNL();
1504
1505 if (!local->ops->change_interface)
1506 return -EBUSY;
1507
1508 switch (sdata->vif.type) {
1509 case NL80211_IFTYPE_AP:
1510 case NL80211_IFTYPE_STATION:
1511 case NL80211_IFTYPE_ADHOC:
239281f8 1512 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1513 /*
1514 * Could maybe also all others here?
1515 * Just not sure how that interacts
1516 * with the RX/config path e.g. for
1517 * mesh.
1518 */
1519 break;
1520 default:
1521 return -EBUSY;
1522 }
1523
1524 switch (type) {
1525 case NL80211_IFTYPE_AP:
1526 case NL80211_IFTYPE_STATION:
1527 case NL80211_IFTYPE_ADHOC:
239281f8 1528 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1529 /*
1530 * Could probably support everything
1531 * but WDS here (WDS do_open can fail
1532 * under memory pressure, which this
1533 * code isn't prepared to handle).
1534 */
1535 break;
2ca27bcf
JB		 1536 case NL80211_IFTYPE_P2P_CLIENT:
1537 p2p = true;
1538 internal_type = NL80211_IFTYPE_STATION;
1539 break;
1540 case NL80211_IFTYPE_P2P_GO:
1541 p2p = true;
1542 internal_type = NL80211_IFTYPE_AP;
1543 break;
34d4bc4d
JB		 1544 default:
1545 return -EBUSY;
1546 }
1547
2ca27bcf 1548 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1549 if (ret)
1550 return ret;
1551
1552 ieee80211_do_stop(sdata, false);
1553
f142c6b9 1554 ieee80211_teardown_sdata(sdata);
34d4bc4d 1555
2ca27bcf 1556 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1557 if (ret)
a9865538 1558 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1559
3a25a8c8
JB		 1560 /*
1561 * Ignore return value here, there's not much we can do since
1562 * the driver changed the interface type internally already.
1563 * The warnings will hopefully make driver authors fix it :-)
1564 */
a9865538 1565 ieee80211_check_queues(sdata, type);
3a25a8c8 1566
34d4bc4d
JB		 1567 ieee80211_setup_sdata(sdata, type);
1568
f142c6b9 1569 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1570 WARN(err, "type change: do_open returned %d", err);
1571
1572 return ret;
1573}
1574
f3947e2d 1575int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1576 enum nl80211_iftype type)
75636525 1577{
34d4bc4d
JB		 1578 int ret;
1579
f3947e2d
JB		 1580 ASSERT_RTNL();
1581
2ca27bcf 1582 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1583 return 0;
1584
34d4bc4d
JB		 1585 if (ieee80211_sdata_running(sdata)) {
1586 ret = ieee80211_runtime_change_iftype(sdata, type);
1587 if (ret)
1588 return ret;
1589 } else {
1590 /* Purge and reset type-dependent state. */
f142c6b9 1591 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1592 ieee80211_setup_sdata(sdata, type);
1593 }
75636525
JB		 1594
1595 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1596 if (type == NL80211_IFTYPE_STATION)
1597 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1598
1599 return 0;
f0706e82
JB		 1600}
1601
fa9029f8 1602static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1603 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1604{
1605 struct ieee80211_sub_if_data *sdata;
1606 u64 mask, start, addr, val, inc;
1607 u8 *m;
1608 u8 tmp_addr[ETH_ALEN];
1609 int i;
1610
1611 /* default ... something at least */
f142c6b9 1612 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1613
1614 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1615 local->hw.wiphy->n_addresses <= 1)
1616 return;
1617
fa9029f8
JB		 1618 mutex_lock(&local->iflist_mtx);
1619
1620 switch (type) {
1621 case NL80211_IFTYPE_MONITOR:
1622 /* doesn't matter */
1623 break;
1624 case NL80211_IFTYPE_WDS:
1625 case NL80211_IFTYPE_AP_VLAN:
1626 /* match up with an AP interface */
1627 list_for_each_entry(sdata, &local->interfaces, list) {
1628 if (sdata->vif.type != NL80211_IFTYPE_AP)
1629 continue;
f142c6b9 1630 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1631 break;
1632 }
1633 /* keep default if no AP interface present */
1634 break;
6d71117a
JB		 1635 case NL80211_IFTYPE_P2P_CLIENT:
1636 case NL80211_IFTYPE_P2P_GO:
30686bf7 1637 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1638 list_for_each_entry(sdata, &local->interfaces, list) {
1639 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1640 continue;
1641 if (!ieee80211_sdata_running(sdata))
1642 continue;
1643 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1644 goto out_unlock;
1645 }
1646 }
1647 /* otherwise fall through */
fa9029f8
JB		 1648 default:
1649 /* assign a new address if possible -- try n_addresses first */
1650 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1651 bool used = false;
1652
1653 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1654 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1655 sdata->vif.addr)) {
fa9029f8
JB		 1656 used = true;
1657 break;
1658 }
1659 }
1660
1661 if (!used) {
f142c6b9 1662 memcpy(perm_addr,
fa9029f8
JB		 1663 local->hw.wiphy->addresses[i].addr,
1664 ETH_ALEN);
1665 break;
1666 }
1667 }
1668
1669 /* try mask if available */
1670 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1671 break;
1672
1673 m = local->hw.wiphy->addr_mask;
1674 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1675 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1676 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1677
1678 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1679 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1680 pr_info("not contiguous\n");
fa9029f8
JB		 1681 break;
1682 }
1683
ac20976d
HS		 1684 /*
1685 * Pick address of existing interface in case user changed
1686 * MAC address manually, default to perm_addr.
1687 */
fa9029f8 1688 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1689 list_for_each_entry(sdata, &local->interfaces, list) {
1690 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1691 continue;
1692 m = sdata->vif.addr;
1693 break;
1694 }
fa9029f8
JB		 1695 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1696 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1697 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1698
1699 inc = 1ULL<<__ffs64(mask);
1700 val = (start & mask);
1701 addr = (start & ~mask) | (val & mask);
1702 do {
1703 bool used = false;
1704
1705 tmp_addr[5] = addr >> 0*8;
1706 tmp_addr[4] = addr >> 1*8;
1707 tmp_addr[3] = addr >> 2*8;
1708 tmp_addr[2] = addr >> 3*8;
1709 tmp_addr[1] = addr >> 4*8;
1710 tmp_addr[0] = addr >> 5*8;
1711
1712 val += inc;
1713
1714 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1715 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1716 used = true;
1717 break;
1718 }
1719 }
1720
1721 if (!used) {
f142c6b9 1722 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1723 break;
1724 }
1725 addr = (start & ~mask) | (val & mask);
1726 } while (addr != start);
1727
1728 break;
1729 }
1730
6d71117a 1731 out_unlock:
fa9029f8
JB		 1732 mutex_unlock(&local->iflist_mtx);
1733}
1734
3e122be0 1735int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1736 unsigned char name_assign_type,
84efbb84 1737 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1738 struct vif_params *params)
f0706e82 1739{
f142c6b9 1740 struct net_device *ndev = NULL;
f0706e82 1741 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1742 struct txq_info *txqi;
80a83cfc 1743 void (*if_setup)(struct net_device *dev);
75636525 1744 int ret, i;
ded81f6b 1745 int txqs = 1;
f0706e82
JB		 1746
1747 ASSERT_RTNL();
75636525 1748
708d50ed 1749 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
f142c6b9
JB		 1750 struct wireless_dev *wdev;
1751
1752 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1753 GFP_KERNEL);
1754 if (!sdata)
1755 return -ENOMEM;
1756 wdev = &sdata->wdev;
1757
1758 sdata->dev = NULL;
1759 strlcpy(sdata->name, name, IFNAMSIZ);
1760 ieee80211_assign_perm_addr(local, wdev->address, type);
1761 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1762 } else {
ba8c3d6f
FF		 1763 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1764 sizeof(void *));
1765 int txq_size = 0;
1766
1767 if (local->ops->wake_tx_queue)
1768 txq_size += sizeof(struct txq_info) +
1769 local->hw.txq_data_size;
1770
80a83cfc
MK		 1771 if (local->ops->wake_tx_queue)
1772 if_setup = ieee80211_if_setup_no_queue;
1773 else
1774 if_setup = ieee80211_if_setup;
1775
f142c6b9
JB		 1776 if (local->hw.queues >= IEEE80211_NUM_ACS)
1777 txqs = IEEE80211_NUM_ACS;
1778
ba8c3d6f 1779 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1780 name, name_assign_type,
80a83cfc 1781 if_setup, txqs, 1);
f142c6b9
JB		 1782 if (!ndev)
1783 return -ENOMEM;
1784 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1785
5a490510
JB		 1786 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1787 if (!ndev->tstats) {
1788 free_netdev(ndev);
1789 return -ENOMEM;
1790 }
1791
f142c6b9
JB		 1792 ndev->needed_headroom = local->tx_headroom +
1793 4*6 /* four MAC addresses */
1794 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1795 + 6 /* mesh */
1796 + 8 /* rfc1042/bridge tunnel */
1797 - ETH_HLEN /* ethernet hard_header_len */
1798 + IEEE80211_ENCRYPT_HEADROOM;
1799 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1800
1801 ret = dev_alloc_name(ndev, ndev->name);
1802 if (ret < 0) {
e6436be2 1803 ieee80211_if_free(ndev);
f142c6b9
JB		 1804 return ret;
1805 }
1806
1807 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1808 if (params && is_valid_ether_addr(params->macaddr))
1809 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1810 else
1811 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1812 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1813
1814 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1815 sdata = netdev_priv(ndev);
1816 ndev->ieee80211_ptr = &sdata->wdev;
1817 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1818 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1819
ba8c3d6f
FF		 1820 if (txq_size) {
1821 txqi = netdev_priv(ndev) + size;
fa962b92 1822 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1823 }
1824
f142c6b9
JB		 1825 sdata->dev = ndev;
1826 }
75636525
JB		 1827
1828 /* initialise type-independent data */
f0706e82 1829 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1830 sdata->local = local;
75636525
JB		 1831
1832 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1833 skb_queue_head_init(&sdata->fragments[i].skb_list);
1834
1835 INIT_LIST_HEAD(&sdata->key_list);
1836
164eb02d
SW		 1837 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1838 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1839 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1840 ieee80211_delayed_tailroom_dec);
97f97b1f 1841
57fbcce3 1842 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1843 struct ieee80211_supported_band *sband;
1844 sband = local->hw.wiphy->bands[i];
1845 sdata->rc_rateidx_mask[i] =
1846 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1847 if (sband) {
1848 __le16 cap;
1849 u16 *vht_rate_mask;
1850
19468413
SW		 1851 memcpy(sdata->rc_rateidx_mcs_mask[i],
1852 sband->ht_cap.mcs.rx_mask,
1853 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1854
1855 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1856 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1857 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1858 } else {
19468413
SW		 1859 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1860 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1861 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1862 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1863 }
37eb0b16 1864 }
75636525 1865
3a25a8c8
JB		 1866 ieee80211_set_default_queues(sdata);
1867
1ea6f9c0
JB		 1868 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1869 sdata->user_power_level = local->user_power_level;
1870
2475b1cc
MS		 1871 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1872
75636525
JB		 1873 /* setup type-dependent data */
1874 ieee80211_setup_sdata(sdata, type);
f0706e82 1875
f142c6b9
JB		 1876 if (ndev) {
1877 if (params) {
1878 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1879 if (type == NL80211_IFTYPE_STATION)
1880 sdata->u.mgd.use_4addr = params->use_4addr;
1881 }
9bc383de 1882
f142c6b9 1883 ndev->features |= local->hw.netdev_features;
72d78728 1884
b7ffbd7e
JB		 1885 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1886
f142c6b9
JB		 1887 ret = register_netdevice(ndev);
1888 if (ret) {
e6436be2 1889 ieee80211_if_free(ndev);
f142c6b9
JB		 1890 return ret;
1891 }
1892 }
f0706e82 1893
c771c9d8 1894 mutex_lock(&local->iflist_mtx);
79010420 1895 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1896 mutex_unlock(&local->iflist_mtx);
79010420 1897
84efbb84
JB		 1898 if (new_wdev)
1899 *new_wdev = &sdata->wdev;
f0706e82 1900
f0706e82 1901 return 0;
f0706e82
JB		 1902}
1903
f698d856 1904void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1905{
f0706e82 1906 ASSERT_RTNL();
11a843b7 1907
c771c9d8 1908 mutex_lock(&sdata->local->iflist_mtx);
75636525 1909 list_del_rcu(&sdata->list);
c771c9d8
JB		 1910 mutex_unlock(&sdata->local->iflist_mtx);
1911
75636525 1912 synchronize_rcu();
f142c6b9
JB		 1913
1914 if (sdata->dev) {
1915 unregister_netdevice(sdata->dev);
1916 } else {
1917 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1918 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1919 kfree(sdata);
1920 }
1921}
1922
1923void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1924{
1925 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1926 return;
1927 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1928}
1929
75636525 1930void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1931{
75636525 1932 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1933 LIST_HEAD(unreg_list);
f142c6b9 1934 LIST_HEAD(wdev_list);
f0706e82
JB		 1935
1936 ASSERT_RTNL();
1937
d8d9008c
JB		 1938 /* Before destroying the interfaces, make sure they're all stopped so
1939 * that the hardware is stopped. Otherwise, the driver might still be
1940 * iterating the interfaces during the shutdown, e.g. from a worker
1941 * or from RX processing or similar, and if it does so (using atomic
1942 * iteration) while we're manipulating the list, the iteration will
1943 * crash.
1944 *
1945 * After this, the hardware should be stopped and the driver should
1946 * have stopped all of its activities, so that we can do RCU-unaware
1947 * manipulations of the interface list below.
c8aa22db 1948 */
d8d9008c
JB		 1949 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1950
1951 WARN(local->open_count, "%s: open count remains %d\n",
1952 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1953
efe117ab 1954 mutex_lock(&local->iflist_mtx);
75636525
JB		 1955 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1956 list_del(&sdata->list);
c771c9d8 1957
f142c6b9
JB		 1958 if (sdata->dev)
1959 unregister_netdevice_queue(sdata->dev, &unreg_list);
1960 else
1961 list_add(&sdata->list, &wdev_list);
f0706e82 1962 }
efe117ab
ED		 1963 mutex_unlock(&local->iflist_mtx);
1964 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1965
1966 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1967 list_del(&sdata->list);
1968 cfg80211_unregister_wdev(&sdata->wdev);
1969 kfree(sdata);
1970 }
f0706e82 1971}
5cff20e6 1972
47846c9b 1973static int netdev_notify(struct notifier_block *nb,
351638e7 1974 unsigned long state, void *ptr)
47846c9b 1975{
351638e7 1976 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1977 struct ieee80211_sub_if_data *sdata;
1978
1979 if (state != NETDEV_CHANGENAME)
8bd811aa 1980 return NOTIFY_DONE;
47846c9b
JB		 1981
1982 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1983 return NOTIFY_DONE;
47846c9b
JB		 1984
1985 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1986 return NOTIFY_DONE;
47846c9b
JB		 1987
1988 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1989 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1990 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1991
1992 return NOTIFY_OK;
47846c9b
JB		 1993}
1994
1995static struct notifier_block mac80211_netdev_notifier = {
1996 .notifier_call = netdev_notify,
1997};
1998
1999int ieee80211_iface_init(void)
2000{
2001 return register_netdevice_notifier(&mac80211_netdev_notifier);
2002}
2003
2004void ieee80211_iface_exit(void)
2005{
2006 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2007}
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