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Merge tag 'sound-fix-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
[linux-2.6-block.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
db82d8a9
LB		 76void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
77 bool update_bss)
1ea6f9c0 78{
5ad11b50
EG		 79 if (__ieee80211_recalc_txpower(sdata) ||
80 (update_bss && ieee80211_sdata_running(sdata)))
1ea6f9c0
JB		 81 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
82}
c771c9d8 83
62a40a15 84static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 85{
86 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
87 return 0;
88
89 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
90 return IEEE80211_CONF_CHANGE_IDLE;
91}
92
62a40a15 93static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 94{
95 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
96 return 0;
97
3b24f4c6 98 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 99
100 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
101 return IEEE80211_CONF_CHANGE_IDLE;
102}
103
62a40a15
JB		 104static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
105 bool force_active)
cc45ae54 106{
1d5e1266 107 bool working, scanning, active;
cc45ae54 108 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 109
cc45ae54
JB		 110 lockdep_assert_held(&local->mtx);
111
62a40a15
JB		 112 active = force_active ||
113 !list_empty(&local->chanctx_list) ||
114 local->monitors;
cc45ae54 115
1d5e1266
JB		 116 working = !local->ops->remain_on_channel &&
117 !list_empty(&local->roc_list);
cc45ae54 118
f1e3e051
JB		 119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 121
cc45ae54
JB		 122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124 else
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126
fd0f979a 127 if (active)
cc45ae54
JB		 128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129 else
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
133
fd0f979a 134 if (working || scanning || active)
62a40a15
JB		 135 return __ieee80211_idle_off(local);
136 return __ieee80211_idle_on(local);
137}
138
139u32 ieee80211_idle_off(struct ieee80211_local *local)
140{
141 return __ieee80211_recalc_idle(local, true);
142}
143
144void ieee80211_recalc_idle(struct ieee80211_local *local)
145{
146 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 147 if (change)
148 ieee80211_hw_config(local, change);
cc45ae54
JB		 149}
150
0d143fe1
JB		 151static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
152{
09b1426e 153 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 154 return -EINVAL;
0d143fe1 155
0d143fe1
JB		 156 dev->mtu = new_mtu;
157 return 0;
158}
159
3899ba90 160static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 161 bool check_dup)
478622e8 162{
ac20976d
HS		 163 struct ieee80211_local *local = sdata->local;
164 struct ieee80211_sub_if_data *iter;
478622e8
HS		 165 u64 new, mask, tmp;
166 u8 *m;
167 int ret = 0;
168
169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
170 return 0;
171
172 m = addr;
173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
176
177 m = local->hw.wiphy->addr_mask;
178 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
181
31eba5bc
FF		 182 if (!check_dup)
183 return ret;
478622e8
HS		 184
185 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 186 list_for_each_entry(iter, &local->interfaces, list) {
187 if (iter == sdata)
478622e8
HS		 188 continue;
189
3899ba90
JL		 190 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
191 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 192 continue;
193
ac20976d 194 m = iter->vif.addr;
478622e8
HS		 195 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
198
199 if ((new & ~mask) != (tmp & ~mask)) {
200 ret = -EINVAL;
201 break;
202 }
203 }
204 mutex_unlock(&local->iflist_mtx);
205
206 return ret;
207}
208
47846c9b
JB		 209static int ieee80211_change_mac(struct net_device *dev, void *addr)
210{
211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 212 struct sockaddr *sa = addr;
31eba5bc 213 bool check_dup = true;
47846c9b
JB		 214 int ret;
215
9607e6b6 216 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 217 return -EBUSY;
218
31eba5bc
FF		 219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
220 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
221 check_dup = false;
222
3899ba90 223 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 224 if (ret)
225 return ret;
226
fc5f7577 227 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 228
229 if (ret == 0)
fc5f7577 230 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 231
232 return ret;
233}
234
0d143fe1
JB		 235static inline int identical_mac_addr_allowed(int type1, int type2)
236{
237 return type1 == NL80211_IFTYPE_MONITOR ||
238 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 239 type1 == NL80211_IFTYPE_P2P_DEVICE ||
240 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 241 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
242 (type1 == NL80211_IFTYPE_WDS &&
243 (type2 == NL80211_IFTYPE_WDS ||
244 type2 == NL80211_IFTYPE_AP)) ||
245 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
246 (type1 == NL80211_IFTYPE_AP_VLAN &&
247 (type2 == NL80211_IFTYPE_AP ||
248 type2 == NL80211_IFTYPE_AP_VLAN));
249}
250
87490f6d
JB		 251static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
252 enum nl80211_iftype iftype)
0d143fe1 253{
b4a4bf5d 254 struct ieee80211_local *local = sdata->local;
87490f6d 255 struct ieee80211_sub_if_data *nsdata;
b6a55015 256 int ret;
0d143fe1 257
87490f6d 258 ASSERT_RTNL();
0d143fe1
JB		 259
260 /* we hold the RTNL here so can safely walk the list */
261 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 262 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 263 /*
264 * Only OCB and monitor mode may coexist
265 */
266 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
267 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
268 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
269 nsdata->vif.type == NL80211_IFTYPE_OCB))
270 return -EBUSY;
271
0d143fe1
JB		 272 /*
273 * Allow only a single IBSS interface to be up at any
274 * time. This is restricted because beacon distribution
275 * cannot work properly if both are in the same IBSS.
276 *
277 * To remove this restriction we'd have to disallow them
278 * from setting the same SSID on different IBSS interfaces
279 * belonging to the same hardware. Then, however, we're
280 * faced with having to adopt two different TSF timers...
281 */
87490f6d 282 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 283 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
284 return -EBUSY;
73da7d5b
SW		 285 /*
286 * will not add another interface while any channel
287 * switch is active.
288 */
289 if (nsdata->vif.csa_active)
290 return -EBUSY;
0d143fe1
JB		 291
292 /*
293 * The remaining checks are only performed for interfaces
294 * with the same MAC address.
295 */
371a255e
JB		 296 if (!ether_addr_equal(sdata->vif.addr,
297 nsdata->vif.addr))
0d143fe1
JB		 298 continue;
299
300 /*
301 * check whether it may have the same address
302 */
87490f6d 303 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 304 nsdata->vif.type))
305 return -ENOTUNIQ;
306
307 /*
308 * can only add VLANs to enabled APs
309 */
87490f6d 310 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 311 nsdata->vif.type == NL80211_IFTYPE_AP)
312 sdata->bss = &nsdata->u.ap;
313 }
314 }
315
b6a55015
LC		 316 mutex_lock(&local->chanctx_mtx);
317 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
318 mutex_unlock(&local->chanctx_mtx);
319 return ret;
87490f6d
JB		 320}
321
a9865538
JB		 322static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
323 enum nl80211_iftype iftype)
3a25a8c8
JB		 324{
325 int n_queues = sdata->local->hw.queues;
326 int i;
327
a9865538 328 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 329 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
331 IEEE80211_INVAL_HW_QUEUE))
332 return -EINVAL;
333 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
334 n_queues))
335 return -EINVAL;
336 }
3a25a8c8
JB		 337 }
338
a9865538
JB		 339 if ((iftype != NL80211_IFTYPE_AP &&
340 iftype != NL80211_IFTYPE_P2P_GO &&
341 iftype != NL80211_IFTYPE_MESH_POINT) ||
30686bf7 342 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
3a25a8c8
JB		 343 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
344 return 0;
345 }
346
347 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
348 return -EINVAL;
349
350 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
351 return -EINVAL;
352
353 return 0;
354}
355
85416a4f
CL		 356void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
357 const int offset)
358{
359 struct ieee80211_local *local = sdata->local;
360 u32 flags = sdata->u.mntr_flags;
361
362#define ADJUST(_f, _s) do { \
363 if (flags & MONITOR_FLAG_##_f) \
364 local->fif_##_s += offset; \
365 } while (0)
366
367 ADJUST(FCSFAIL, fcsfail);
368 ADJUST(PLCPFAIL, plcpfail);
369 ADJUST(CONTROL, control);
370 ADJUST(CONTROL, pspoll);
371 ADJUST(OTHER_BSS, other_bss);
372
373#undef ADJUST
374}
375
3a25a8c8
JB		 376static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
377{
378 struct ieee80211_local *local = sdata->local;
379 int i;
380
381 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
30686bf7 382 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8 383 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 384 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 385 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 386 else
387 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 388 }
389 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
390}
391
3c3e21e7 392int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 393{
394 struct ieee80211_sub_if_data *sdata;
8b305780 395 int ret;
4b6f1dd6 396
30686bf7 397 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 398 return 0;
399
8b305780 400 ASSERT_RTNL();
685fb72b 401
4b6f1dd6 402 if (local->monitor_sdata)
8b305780 403 return 0;
4b6f1dd6
JB		 404
405 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 406 if (!sdata)
407 return -ENOMEM;
4b6f1dd6
JB		 408
409 /* set up data */
410 sdata->local = local;
411 sdata->vif.type = NL80211_IFTYPE_MONITOR;
412 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
413 wiphy_name(local->hw.wiphy));
34171dc0 414 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 415
2475b1cc
MS		 416 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
417
3a25a8c8
JB		 418 ieee80211_set_default_queues(sdata);
419
4b6f1dd6
JB		 420 ret = drv_add_interface(local, sdata);
421 if (WARN_ON(ret)) {
422 /* ok .. stupid driver, it asked for this! */
423 kfree(sdata);
8b305780 424 return ret;
4b6f1dd6
JB		 425 }
426
a9865538 427 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 428 if (ret) {
429 kfree(sdata);
8b305780 430 return ret;
3a25a8c8
JB		 431 }
432
fab57a6c
JB		 433 mutex_lock(&local->iflist_mtx);
434 rcu_assign_pointer(local->monitor_sdata, sdata);
435 mutex_unlock(&local->iflist_mtx);
436
34a3740d 437 mutex_lock(&local->mtx);
4bf88530 438 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 439 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 440 mutex_unlock(&local->mtx);
55de908a 441 if (ret) {
fab57a6c 442 mutex_lock(&local->iflist_mtx);
0c2bef46 443 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 444 mutex_unlock(&local->iflist_mtx);
445 synchronize_net();
55de908a
JB		 446 drv_remove_interface(local, sdata);
447 kfree(sdata);
8b305780 448 return ret;
55de908a
JB		 449 }
450
8b305780 451 return 0;
4b6f1dd6
JB		 452}
453
3c3e21e7 454void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 455{
456 struct ieee80211_sub_if_data *sdata;
457
30686bf7 458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
4b6f1dd6
JB		 459 return;
460
8b305780
JB		 461 ASSERT_RTNL();
462
685fb72b 463 mutex_lock(&local->iflist_mtx);
4b6f1dd6 464
685fb72b
JB		 465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 467 if (!sdata) {
468 mutex_unlock(&local->iflist_mtx);
469 return;
470 }
4b6f1dd6 471
0c2bef46 472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 473 mutex_unlock(&local->iflist_mtx);
474
4b6f1dd6
JB		 475 synchronize_net();
476
34a3740d 477 mutex_lock(&local->mtx);
55de908a 478 ieee80211_vif_release_channel(sdata);
34a3740d 479 mutex_unlock(&local->mtx);
55de908a 480
4b6f1dd6
JB		 481 drv_remove_interface(local, sdata);
482
483 kfree(sdata);
484}
485
34d4bc4d
JB		 486/*
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
490 */
f142c6b9 491int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 492{
f142c6b9
JB		 493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
87490f6d
JB		 495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
497 u32 changed = 0;
498 int res;
499 u32 hw_reconf_flags = 0;
500
0d143fe1
JB		 501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
504 return -ENOLINK;
505 break;
665c93a9
JB		 506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
508
0d143fe1
JB		 509 if (!sdata->bss)
510 return -ENOLINK;
665c93a9 511
4e141dad 512 mutex_lock(&local->mtx);
0d143fe1 513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 514 mutex_unlock(&local->mtx);
665c93a9
JB		 515
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
1351c5d3
JB		 522 sdata->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
2967e031 525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
f9dca80b
MK		 526
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
531
0d143fe1 532 break;
665c93a9 533 }
0d143fe1
JB		 534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
536 break;
537 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
f142c6b9 541 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 542 case NL80211_IFTYPE_OCB:
0d143fe1
JB		 543 /* no special treatment */
544 break;
545 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 546 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 547 case NL80211_IFTYPE_P2P_CLIENT:
548 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 549 /* cannot happen */
550 WARN_ON(1);
551 break;
552 }
553
554 if (local->open_count == 0) {
24487981 555 res = drv_start(local);
0d143fe1
JB		 556 if (res)
557 goto err_del_bss;
e8975581
JB		 558 /* we're brought up, everything changes */
559 hw_reconf_flags = ~0;
1f87f7d3 560 ieee80211_led_radio(local, true);
67408c8c
JB		 561 ieee80211_mod_tpt_led_trig(local,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 563 }
564
565 /*
bf533e0b
JB		 566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
0d143fe1 568 */
f142c6b9 569 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 570 memcpy(dev->dev_addr,
571 local->hw.wiphy->perm_addr,
572 ETH_ALEN);
573 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
574
575 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 576 res = -EADDRNOTAVAIL;
577 goto err_stop;
0adc23f5 578 }
0d143fe1
JB		 579 }
580
0d143fe1
JB		 581 switch (sdata->vif.type) {
582 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata->bss->beacon)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 586 netif_carrier_on(dev);
4d76d21b 587 } else {
3edaf3e6 588 netif_carrier_off(dev);
4d76d21b 589 }
0d143fe1
JB		 590 break;
591 case NL80211_IFTYPE_MONITOR:
592 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
593 local->cooked_mntrs++;
594 break;
595 }
596
31eba5bc
FF		 597 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
598 res = drv_add_interface(local, sdata);
599 if (res)
600 goto err_stop;
601 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 602 res = ieee80211_add_virtual_monitor(local);
603 if (res)
604 goto err_stop;
605 }
606
0d143fe1
JB		 607 /* must be before the call to ieee80211_configure_filter */
608 local->monitors++;
e8975581 609 if (local->monitors == 1) {
0869aea0
JB		 610 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
611 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 612 }
0d143fe1 613
85416a4f 614 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 615 ieee80211_configure_filter(local);
801d929c
FF		 616 mutex_lock(&local->mtx);
617 ieee80211_recalc_idle(local);
618 mutex_unlock(&local->mtx);
53e9b1de
DG		 619
620 netif_carrier_on(dev);
0d143fe1 621 break;
0d143fe1 622 default:
34d4bc4d 623 if (coming_up) {
075e0847
JB		 624 ieee80211_del_virtual_monitor(local);
625
7b7eab6f 626 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 627 if (res)
628 goto err_stop;
a9865538
JB		 629 res = ieee80211_check_queues(sdata,
630 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 631 if (res)
632 goto err_del_interface;
34d4bc4d 633 }
0d143fe1 634
29cbe68c 635 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 636 local->fif_pspoll++;
7be5086d 637 local->fif_probe_req++;
e3b90ca2 638
e3b90ca2 639 ieee80211_configure_filter(local);
7be5086d
JB		 640 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
641 local->fif_probe_req++;
a3c9aa51 642 }
e3b90ca2 643
f142c6b9
JB		 644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
645 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 646 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 647
c405c629
JB		 648 switch (sdata->vif.type) {
649 case NL80211_IFTYPE_STATION:
650 case NL80211_IFTYPE_ADHOC:
651 case NL80211_IFTYPE_AP:
652 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 653 case NL80211_IFTYPE_OCB:
0d143fe1 654 netif_carrier_off(dev);
c405c629 655 break;
1411af15 656 case NL80211_IFTYPE_WDS:
f142c6b9 657 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 658 break;
c405c629 659 default:
a2310824
JB		 660 /* not reached */
661 WARN_ON(1);
c405c629 662 }
59034591
EP		 663
664 /*
cec66283 665 * Set default queue parameters so drivers don't
59034591 666 * need to initialise the hardware if the hardware
cec66283
JB		 667 * doesn't start up with sane defaults.
668 * Enable QoS for anything but station interfaces.
59034591 669 */
cec66283
JB		 670 ieee80211_set_wmm_default(sdata, true,
671 sdata->vif.type != NL80211_IFTYPE_STATION);
0d143fe1
JB		 672 }
673
2d2080c3
JB		 674 set_bit(SDATA_STATE_RUNNING, &sdata->state);
675
0d143fe1
JB		 676 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
677 /* Create STA entry for the WDS peer */
678 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
679 GFP_KERNEL);
680 if (!sta) {
681 res = -ENOMEM;
682 goto err_del_interface;
683 }
684
83d5cc01
JB		 685 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
686 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 688
689 res = sta_info_insert(sta);
690 if (res) {
691 /* STA has been freed */
692 goto err_del_interface;
693 }
1be7fe8d
BJ		 694
695 rate_control_rate_init(sta);
1411af15 696 netif_carrier_on(dev);
f142c6b9
JB		 697 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
698 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 699 }
700
0d143fe1
JB		 701 /*
702 * set_multicast_list will be invoked by the networking core
703 * which will check whether any increments here were done in
704 * error and sync them down to the hardware as filter flags.
705 */
706 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
707 atomic_inc(&local->iff_allmultis);
708
34d4bc4d
JB		 709 if (coming_up)
710 local->open_count++;
711
59034591 712 if (hw_reconf_flags)
e8975581 713 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 714
4a733ef1 715 ieee80211_recalc_ps(local);
965bedad 716
2b436312
JB		 717 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
718 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
719 /* XXX: for AP_VLAN, actually track AP queues */
720 netif_tx_start_all_queues(dev);
721 } else if (dev) {
2b730daa
JB		 722 unsigned long flags;
723 int n_acs = IEEE80211_NUM_ACS;
724 int ac;
725
726 if (local->hw.queues < IEEE80211_NUM_ACS)
727 n_acs = 1;
728
729 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
730 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
731 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
732 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
733 for (ac = 0; ac < n_acs; ac++) {
734 int ac_queue = sdata->vif.hw_queue[ac];
735
736 if (local->queue_stop_reasons[ac_queue] == 0 &&
737 skb_queue_empty(&local->pending[ac_queue]))
738 netif_start_subqueue(dev, ac);
739 }
740 }
741 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
742 }
0d143fe1
JB		 743
744 return 0;
745 err_del_interface:
7b7eab6f 746 drv_remove_interface(local, sdata);
0d143fe1 747 err_stop:
24487981
JB		 748 if (!local->open_count)
749 drv_stop(local);
0d143fe1
JB		 750 err_del_bss:
751 sdata->bss = NULL;
4e141dad
MK		 752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
753 mutex_lock(&local->mtx);
0d143fe1 754 list_del(&sdata->u.vlan.list);
4e141dad
MK		 755 mutex_unlock(&local->mtx);
756 }
4d6c36fa 757 /* might already be clear but that doesn't matter */
2d2080c3 758 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 759 return res;
760}
761
34d4bc4d 762static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 763{
764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 765 int err;
766
767 /* fail early if user set an invalid address */
2fcf2824 768 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 769 return -EADDRNOTAVAIL;
770
771 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
772 if (err)
773 return err;
774
f142c6b9 775 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 776}
777
778static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
779 bool going_down)
780{
0d143fe1 781 struct ieee80211_local *local = sdata->local;
fa962b92 782 struct fq *fq = &local->fq;
5061b0c2
JB		 783 unsigned long flags;
784 struct sk_buff *skb, *tmp;
e8975581 785 u32 hw_reconf_flags = 0;
09f4114e 786 int i, flushed;
397a7a24 787 struct ps_data *ps;
d2859df5 788 struct cfg80211_chan_def chandef;
46238845 789 bool cancel_scan;
0d143fe1 790
c29acf20
RM		 791 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
792
46238845
JB		 793 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
794 if (cancel_scan)
352ffad6
BC		 795 ieee80211_scan_cancel(local);
796
0d143fe1
JB		 797 /*
798 * Stop TX on this interface first.
799 */
f142c6b9
JB		 800 if (sdata->dev)
801 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 802
c8f994ee 803 ieee80211_roc_purge(local, sdata);
af6b6374 804
8ffcc704
EG		 805 switch (sdata->vif.type) {
806 case NL80211_IFTYPE_STATION:
572078be 807 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 808 break;
809 case NL80211_IFTYPE_ADHOC:
cd7760e6 810 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 811 break;
812 case NL80211_IFTYPE_AP:
813 cancel_work_sync(&sdata->u.ap.request_smps_work);
814 break;
815 default:
816 break;
817 }
cd7760e6 818
0d143fe1
JB		 819 /*
820 * Remove all stations associated with this interface.
821 *
822 * This must be done before calling ops->remove_interface()
823 * because otherwise we can later invoke ops->sta_notify()
824 * whenever the STAs are removed, and that invalidates driver
825 * assumptions about always getting a vif pointer that is valid
826 * (because if we remove a STA after ops->remove_interface()
827 * the driver will have removed the vif info already!)
828 *
5eb8f4d7
JB		 829 * In WDS mode a station must exist here and be flushed, for
830 * AP_VLANs stations may exist since there's nothing else that
831 * would have removed them, but in other modes there shouldn't
832 * be any stations.
0d143fe1 833 */
d34ba216 834 flushed = sta_info_flush(sdata);
5eb8f4d7
JB		 835 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
836 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
837 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
0d143fe1 838
df140465 839 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 840 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
841 atomic_dec(&local->iff_allmultis);
842
7be5086d 843 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 844 local->fif_pspoll--;
7be5086d
JB		 845 local->fif_probe_req--;
846 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
847 local->fif_probe_req--;
848 }
e3b90ca2 849
f142c6b9
JB		 850 if (sdata->dev) {
851 netif_addr_lock_bh(sdata->dev);
852 spin_lock_bh(&local->filter_lock);
853 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
854 sdata->dev->addr_len);
855 spin_unlock_bh(&local->filter_lock);
856 netif_addr_unlock_bh(sdata->dev);
f142c6b9 857 }
3ac64bee 858
7cbf0ba5
VN		 859 del_timer_sync(&local->dynamic_ps_timer);
860 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 861
04ecd257 862 cancel_work_sync(&sdata->recalc_smps);
dbd72850 863 sdata_lock(sdata);
59af6928 864 mutex_lock(&local->mtx);
73da7d5b 865 sdata->vif.csa_active = false;
0c21e632
LC		 866 if (sdata->vif.type == NL80211_IFTYPE_STATION)
867 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 868 if (sdata->csa_block_tx) {
869 ieee80211_wake_vif_queues(local, sdata,
870 IEEE80211_QUEUE_STOP_REASON_CSA);
871 sdata->csa_block_tx = false;
872 }
59af6928 873 mutex_unlock(&local->mtx);
dbd72850 874 sdata_unlock(sdata);
59af6928 875
73da7d5b 876 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 877
164eb02d
SW		 878 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
879
880 if (sdata->wdev.cac_started) {
d2859df5 881 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 882 WARN_ON(local->suspended);
34a3740d 883 mutex_lock(&local->mtx);
164eb02d 884 ieee80211_vif_release_channel(sdata);
34a3740d 885 mutex_unlock(&local->mtx);
d2859df5
JD		 886 cfg80211_cac_event(sdata->dev, &chandef,
887 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 888 GFP_KERNEL);
889 }
890
0d143fe1
JB		 891 /* APs need special treatment */
892 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 893 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 894
895 /* down all dependent devices, that is VLANs */
57c9fff3 896 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 897 u.vlan.list)
898 dev_close(vlan->dev);
899 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 900 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
901 /* remove all packets in parent bc_buf pointing to this dev */
902 ps = &sdata->bss->ps;
903
904 spin_lock_irqsave(&ps->bc_buf.lock, flags);
905 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
906 if (skb->dev == sdata->dev) {
907 __skb_unlink(skb, &ps->bc_buf);
908 local->total_ps_buffered--;
909 ieee80211_free_txskb(&local->hw, skb);
910 }
911 }
912 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 913 }
914
34d4bc4d
JB		 915 if (going_down)
916 local->open_count--;
0d143fe1
JB		 917
918 switch (sdata->vif.type) {
919 case NL80211_IFTYPE_AP_VLAN:
4e141dad 920 mutex_lock(&local->mtx);
0d143fe1 921 list_del(&sdata->u.vlan.list);
4e141dad 922 mutex_unlock(&local->mtx);
0c2bef46 923 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 924 /* see comment in the default case below */
925 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 926 /* no need to tell driver */
927 break;
928 case NL80211_IFTYPE_MONITOR:
929 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
930 local->cooked_mntrs--;
931 break;
932 }
933
934 local->monitors--;
e8975581 935 if (local->monitors == 0) {
0869aea0
JB		 936 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
937 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 938 }
0d143fe1 939
85416a4f 940 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 941 break;
f142c6b9
JB		 942 case NL80211_IFTYPE_P2P_DEVICE:
943 /* relies on synchronize_rcu() below */
0c2bef46 944 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 945 /* fall through */
0d143fe1 946 default:
0b7dff4f 947 cancel_work_sync(&sdata->work);
35f20c14
JB		 948 /*
949 * When we get here, the interface is marked down.
7907c7d3 950 * Free the remaining keys, if there are any
10b68487
FF		 951 * (which can happen in AP mode if userspace sets
952 * keys before the interface is operating, and maybe
953 * also in WDS mode)
75de9113 954 *
7907c7d3
JB		 955 * Force the key freeing to always synchronize_net()
956 * to wait for the RX path in case it is using this
10b68487 957 * interface enqueuing frames at this very time on
75de9113 958 * another CPU.
35f20c14 959 */
7907c7d3 960 ieee80211_free_keys(sdata, true);
1861b845 961 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 962 }
963
964 sdata->bss = NULL;
965
5061b0c2
JB		 966 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
967 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
968 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
969 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
970 if (info->control.vif == &sdata->vif) {
971 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 972 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 973 }
974 }
975 }
976 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 977
ba8c3d6f
FF		 978 if (sdata->vif.txq) {
979 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
980
fa962b92
MK		 981 spin_lock_bh(&fq->lock);
982 ieee80211_txq_purge(local, txqi);
983 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 984 }
985
b2c0958b
JB		 986 if (local->open_count == 0)
987 ieee80211_clear_tx_pending(local);
988
989 /*
990 * If the interface goes down while suspended, presumably because
991 * the device was unplugged and that happens before our resume,
992 * then the driver is already unconfigured and the remainder of
993 * this function isn't needed.
994 * XXX: what about WoWLAN? If the device has software state, e.g.
995 * memory allocated, it might expect teardown commands from
996 * mac80211 here?
997 */
998 if (local->suspended) {
999 WARN_ON(local->wowlan);
1000 WARN_ON(rtnl_dereference(local->monitor_sdata));
1001 return;
1002 }
1003
1004 switch (sdata->vif.type) {
1005 case NL80211_IFTYPE_AP_VLAN:
1006 break;
1007 case NL80211_IFTYPE_MONITOR:
1008 if (local->monitors == 0)
1009 ieee80211_del_virtual_monitor(local);
1010
1011 mutex_lock(&local->mtx);
1012 ieee80211_recalc_idle(local);
1013 mutex_unlock(&local->mtx);
31eba5bc
FF		 1014
1015 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1016 break;
1017
1018 /* fall through */
b2c0958b
JB		 1019 default:
1020 if (going_down)
1021 drv_remove_interface(local, sdata);
1022 }
1023
4a733ef1 1024 ieee80211_recalc_ps(local);
b2c0958b 1025
46238845
JB		 1026 if (cancel_scan)
1027 flush_delayed_work(&local->scan_work);
1028
b2c0958b
JB		 1029 if (local->open_count == 0) {
1030 ieee80211_stop_device(local);
1031
1032 /* no reconfiguring after stop! */
1033 return;
1034 }
1035
1036 /* do after stop to avoid reconfiguring when we stop anyway */
1037 ieee80211_configure_filter(local);
1038 ieee80211_hw_config(local, hw_reconf_flags);
1039
1040 if (local->monitors == local->open_count)
075e0847 1041 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1042}
1043
1044static int ieee80211_stop(struct net_device *dev)
1045{
1046 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1047
1048 ieee80211_do_stop(sdata, true);
5061b0c2 1049
0d143fe1
JB		 1050 return 0;
1051}
1052
1053static void ieee80211_set_multicast_list(struct net_device *dev)
1054{
0d143fe1 1055 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1056 struct ieee80211_local *local = sdata->local;
df140465 1057 int allmulti, sdata_allmulti;
0d143fe1
JB		 1058
1059 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1060 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1061
1062 if (allmulti != sdata_allmulti) {
1063 if (dev->flags & IFF_ALLMULTI)
1064 atomic_inc(&local->iff_allmultis);
1065 else
1066 atomic_dec(&local->iff_allmultis);
1067 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1068 }
1069
3b8d81e0 1070 spin_lock_bh(&local->filter_lock);
22bedad3 1071 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1072 spin_unlock_bh(&local->filter_lock);
3ac64bee 1073 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1074}
1075
75636525
JB		 1076/*
1077 * Called when the netdev is removed or, by the code below, before
1078 * the interface type changes.
1079 */
f142c6b9 1080static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1081{
1082 int i;
1083
75636525 1084 /* free extra data */
7907c7d3 1085 ieee80211_free_keys(sdata, false);
75636525 1086
aee14ceb
JM		 1087 ieee80211_debugfs_remove_netdev(sdata);
1088
f0706e82 1089 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1090 __skb_queue_purge(&sdata->fragments[i].skb_list);
1091 sdata->fragment_next = 0;
11a843b7 1092
b9dcf712 1093 if (ieee80211_vif_is_mesh(&sdata->vif))
0371a08f 1094 ieee80211_mesh_teardown_sdata(sdata);
f0706e82
JB		 1095}
1096
f142c6b9
JB		 1097static void ieee80211_uninit(struct net_device *dev)
1098{
1099 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1100}
1101
cf0277e7 1102static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1103 struct sk_buff *skb,
99932d4f
DB		 1104 void *accel_priv,
1105 select_queue_fallback_t fallback)
cf0277e7
JB		 1106{
1107 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1108}
1109
5a490510
JB		 1110static struct rtnl_link_stats64 *
1111ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1112{
1113 int i;
1114
1115 for_each_possible_cpu(i) {
1116 const struct pcpu_sw_netstats *tstats;
1117 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1118 unsigned int start;
1119
1120 tstats = per_cpu_ptr(dev->tstats, i);
1121
1122 do {
1123 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1124 rx_packets = tstats->rx_packets;
1125 tx_packets = tstats->tx_packets;
1126 rx_bytes = tstats->rx_bytes;
1127 tx_bytes = tstats->tx_bytes;
1128 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1129
1130 stats->rx_packets += rx_packets;
1131 stats->tx_packets += tx_packets;
1132 stats->rx_bytes += rx_bytes;
1133 stats->tx_bytes += tx_bytes;
1134 }
1135
1136 return stats;
1137}
1138
587e729e
JB		 1139static const struct net_device_ops ieee80211_dataif_ops = {
1140 .ndo_open = ieee80211_open,
1141 .ndo_stop = ieee80211_stop,
f142c6b9 1142 .ndo_uninit = ieee80211_uninit,
587e729e 1143 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1144 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1145 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1146 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1147 .ndo_select_queue = ieee80211_netdev_select_queue,
5a490510 1148 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1149};
1150
cf0277e7 1151static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1152 struct sk_buff *skb,
99932d4f
DB		 1153 void *accel_priv,
1154 select_queue_fallback_t fallback)
cf0277e7
JB		 1155{
1156 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1157 struct ieee80211_local *local = sdata->local;
1158 struct ieee80211_hdr *hdr;
1159 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1160
32c5057b 1161 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1162 return 0;
1163
1164 if (skb->len < 4 ||
b49bb574 1165 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1166 return 0; /* doesn't matter, frame will be dropped */
1167
b49bb574 1168 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1169
00e96dec 1170 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1171}
1172
587e729e
JB		 1173static const struct net_device_ops ieee80211_monitorif_ops = {
1174 .ndo_open = ieee80211_open,
1175 .ndo_stop = ieee80211_stop,
f142c6b9 1176 .ndo_uninit = ieee80211_uninit,
587e729e 1177 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1178 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1179 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1180 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1181 .ndo_select_queue = ieee80211_monitor_select_queue,
5a490510 1182 .ndo_get_stats64 = ieee80211_get_stats64,
587e729e
JB		 1183};
1184
5a490510
JB		 1185static void ieee80211_if_free(struct net_device *dev)
1186{
1187 free_percpu(dev->tstats);
1188 free_netdev(dev);
1189}
1190
587e729e
JB		 1191static void ieee80211_if_setup(struct net_device *dev)
1192{
1193 ether_setup(dev);
550fd08c 1194 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1195 dev->netdev_ops = &ieee80211_dataif_ops;
5a490510 1196 dev->destructor = ieee80211_if_free;
587e729e
JB		 1197}
1198
80a83cfc
MK		 1199static void ieee80211_if_setup_no_queue(struct net_device *dev)
1200{
1201 ieee80211_if_setup(dev);
1202 dev->priv_flags |= IFF_NO_QUEUE;
1203}
1204
1fa57d01
JB		 1205static void ieee80211_iface_work(struct work_struct *work)
1206{
1207 struct ieee80211_sub_if_data *sdata =
1208 container_of(work, struct ieee80211_sub_if_data, work);
1209 struct ieee80211_local *local = sdata->local;
1210 struct sk_buff *skb;
344eec67 1211 struct sta_info *sta;
c1475ca9 1212 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1213 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1214
1215 if (!ieee80211_sdata_running(sdata))
1216 return;
1217
fc58c47e 1218 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1fa57d01
JB		 1219 return;
1220
4afaff17 1221 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1222 return;
1223
1224 /* first process frames */
1225 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1226 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1227
c1475ca9
JB		 1228 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1229 ra_tid = (void *)&skb->cb;
1230 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1231 ra_tid->tid);
1232 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1233 ra_tid = (void *)&skb->cb;
1234 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1235 ra_tid->tid);
08cf42e8
MK		 1236 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1237 rx_agg = (void *)&skb->cb;
1238 mutex_lock(&local->sta_mtx);
1239 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1240 if (sta)
08cf42e8 1241 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1242 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1243 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1244 false, true);
08cf42e8
MK		 1245 mutex_unlock(&local->sta_mtx);
1246 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1247 rx_agg = (void *)&skb->cb;
1248 mutex_lock(&local->sta_mtx);
1249 sta = sta_info_get_bss(sdata, rx_agg->addr);
1250 if (sta)
1251 __ieee80211_stop_rx_ba_session(sta,
1252 rx_agg->tid,
1253 WLAN_BACK_RECIPIENT, 0,
1254 false);
1255 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1256 } else if (ieee80211_is_action(mgmt->frame_control) &&
1257 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1258 int len = skb->len;
bed7ee6e 1259
a93e3644 1260 mutex_lock(&local->sta_mtx);
875ae5f6 1261 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1262 if (sta) {
1263 switch (mgmt->u.action.u.addba_req.action_code) {
1264 case WLAN_ACTION_ADDBA_REQ:
1265 ieee80211_process_addba_request(
1266 local, sta, mgmt, len);
1267 break;
1268 case WLAN_ACTION_ADDBA_RESP:
1269 ieee80211_process_addba_resp(local, sta,
1270 mgmt, len);
1271 break;
1272 case WLAN_ACTION_DELBA:
1273 ieee80211_process_delba(sdata, sta,
1274 mgmt, len);
1275 break;
1276 default:
1277 WARN_ON(1);
1278 break;
1279 }
1280 }
a93e3644 1281 mutex_unlock(&local->sta_mtx);
23a1f8d4
SS		 1282 } else if (ieee80211_is_action(mgmt->frame_control) &&
1283 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1284 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1285 case WLAN_VHT_ACTION_GROUPID_MGMT:
1286 ieee80211_process_mu_groups(sdata, mgmt);
1287 break;
1288 default:
1289 WARN_ON(1);
1290 break;
1291 }
344eec67
JB		 1292 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1293 struct ieee80211_hdr *hdr = (void *)mgmt;
1294 /*
1295 * So the frame isn't mgmt, but frame_control
1296 * is at the right place anyway, of course, so
1297 * the if statement is correct.
1298 *
1299 * Warn if we have other data frame types here,
1300 * they must not get here.
1301 */
1302 WARN_ON(hdr->frame_control &
1303 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1304 WARN_ON(!(hdr->seq_ctrl &
1305 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1306 /*
1307 * This was a fragment of a frame, received while
1308 * a block-ack session was active. That cannot be
1309 * right, so terminate the session.
1310 */
a93e3644 1311 mutex_lock(&local->sta_mtx);
875ae5f6 1312 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1313 if (sta) {
1314 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1315 IEEE80211_QOS_CTL_TID_MASK;
1316
1317 __ieee80211_stop_rx_ba_session(
1318 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1319 WLAN_REASON_QSTA_REQUIRE_SETUP,
1320 true);
344eec67 1321 }
a93e3644 1322 mutex_unlock(&local->sta_mtx);
bed7ee6e 1323 } else switch (sdata->vif.type) {
1fa57d01
JB		 1324 case NL80211_IFTYPE_STATION:
1325 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1326 break;
1327 case NL80211_IFTYPE_ADHOC:
1328 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1329 break;
1330 case NL80211_IFTYPE_MESH_POINT:
1331 if (!ieee80211_vif_is_mesh(&sdata->vif))
1332 break;
1333 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1334 break;
1335 default:
1336 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1337 break;
1338 }
36b3a628
JB		 1339
1340 kfree_skb(skb);
1fa57d01
JB		 1341 }
1342
1343 /* then other type-dependent work */
1344 switch (sdata->vif.type) {
1345 case NL80211_IFTYPE_STATION:
1346 ieee80211_sta_work(sdata);
1347 break;
1348 case NL80211_IFTYPE_ADHOC:
1349 ieee80211_ibss_work(sdata);
1350 break;
1351 case NL80211_IFTYPE_MESH_POINT:
1352 if (!ieee80211_vif_is_mesh(&sdata->vif))
1353 break;
1354 ieee80211_mesh_work(sdata);
1355 break;
239281f8
RL		 1356 case NL80211_IFTYPE_OCB:
1357 ieee80211_ocb_work(sdata);
1358 break;
1fa57d01
JB		 1359 default:
1360 break;
1361 }
1362}
1363
04ecd257
JB		 1364static void ieee80211_recalc_smps_work(struct work_struct *work)
1365{
1366 struct ieee80211_sub_if_data *sdata =
1367 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1368
1369 ieee80211_recalc_smps(sdata);
1370}
1fa57d01 1371
75636525
JB		 1372/*
1373 * Helper function to initialise an interface to a specific type.
1374 */
1375static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1376 enum nl80211_iftype type)
f0706e82 1377{
239281f8
RL		 1378 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1379 0xff, 0xff, 0xff};
1380
75636525
JB		 1381 /* clear type-dependent union */
1382 memset(&sdata->u, 0, sizeof(sdata->u));
1383
1384 /* and set some type-dependent values */
1385 sdata->vif.type = type;
2ca27bcf 1386 sdata->vif.p2p = false;
60719ffd 1387 sdata->wdev.iftype = type;
75636525 1388
a621fa4d
JB		 1389 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1390 sdata->control_port_no_encrypt = false;
2475b1cc 1391 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1392 sdata->vif.bss_conf.idle = true;
a621fa4d 1393
b53be792
SW		 1394 sdata->noack_map = 0;
1395
f142c6b9
JB		 1396 /* only monitor/p2p-device differ */
1397 if (sdata->dev) {
1398 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1399 sdata->dev->type = ARPHRD_ETHER;
1400 }
75636525 1401
35f20c14 1402 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1403 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1404 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1405 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1406 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1407 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1408
75636525 1409 switch (type) {
2ca27bcf
JB		 1410 case NL80211_IFTYPE_P2P_GO:
1411 type = NL80211_IFTYPE_AP;
1412 sdata->vif.type = type;
1413 sdata->vif.p2p = true;
1414 /* fall through */
05c914fe 1415 case NL80211_IFTYPE_AP:
d012a605 1416 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1417 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1418 INIT_WORK(&sdata->u.ap.request_smps_work,
1419 ieee80211_request_smps_ap_work);
ad2d223a 1420 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1421 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1422 break;
2ca27bcf
JB		 1423 case NL80211_IFTYPE_P2P_CLIENT:
1424 type = NL80211_IFTYPE_STATION;
1425 sdata->vif.type = type;
1426 sdata->vif.p2p = true;
1427 /* fall through */
05c914fe 1428 case NL80211_IFTYPE_STATION:
ad2d223a 1429 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1430 ieee80211_sta_setup_sdata(sdata);
472dbc45 1431 break;
6e0bd6c3 1432 case NL80211_IFTYPE_OCB:
239281f8
RL		 1433 sdata->vif.bss_conf.bssid = bssid_wildcard;
1434 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1435 break;
46900298 1436 case NL80211_IFTYPE_ADHOC:
ad2d223a 1437 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1438 ieee80211_ibss_setup_sdata(sdata);
1439 break;
05c914fe 1440 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1441 if (ieee80211_vif_is_mesh(&sdata->vif))
1442 ieee80211_mesh_init_sdata(sdata);
1443 break;
05c914fe 1444 case NL80211_IFTYPE_MONITOR:
75636525 1445 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1446 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1447 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1448 MONITOR_FLAG_OTHER_BSS;
1449 break;
05c914fe 1450 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1451 sdata->vif.bss_conf.bssid = NULL;
1452 break;
05c914fe 1453 case NL80211_IFTYPE_AP_VLAN:
98104fde 1454 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1455 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1456 break;
05c914fe 1457 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1458 case NUM_NL80211_IFTYPES:
75636525
JB		 1459 BUG();
1460 break;
1461 }
1462
1463 ieee80211_debugfs_add_netdev(sdata);
1464}
1465
34d4bc4d
JB		 1466static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1467 enum nl80211_iftype type)
1468{
1469 struct ieee80211_local *local = sdata->local;
1470 int ret, err;
2ca27bcf
JB		 1471 enum nl80211_iftype internal_type = type;
1472 bool p2p = false;
34d4bc4d
JB		 1473
1474 ASSERT_RTNL();
1475
1476 if (!local->ops->change_interface)
1477 return -EBUSY;
1478
1479 switch (sdata->vif.type) {
1480 case NL80211_IFTYPE_AP:
1481 case NL80211_IFTYPE_STATION:
1482 case NL80211_IFTYPE_ADHOC:
239281f8 1483 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1484 /*
1485 * Could maybe also all others here?
1486 * Just not sure how that interacts
1487 * with the RX/config path e.g. for
1488 * mesh.
1489 */
1490 break;
1491 default:
1492 return -EBUSY;
1493 }
1494
1495 switch (type) {
1496 case NL80211_IFTYPE_AP:
1497 case NL80211_IFTYPE_STATION:
1498 case NL80211_IFTYPE_ADHOC:
239281f8 1499 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1500 /*
1501 * Could probably support everything
1502 * but WDS here (WDS do_open can fail
1503 * under memory pressure, which this
1504 * code isn't prepared to handle).
1505 */
1506 break;
2ca27bcf
JB		 1507 case NL80211_IFTYPE_P2P_CLIENT:
1508 p2p = true;
1509 internal_type = NL80211_IFTYPE_STATION;
1510 break;
1511 case NL80211_IFTYPE_P2P_GO:
1512 p2p = true;
1513 internal_type = NL80211_IFTYPE_AP;
1514 break;
34d4bc4d
JB		 1515 default:
1516 return -EBUSY;
1517 }
1518
2ca27bcf 1519 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1520 if (ret)
1521 return ret;
1522
1523 ieee80211_do_stop(sdata, false);
1524
f142c6b9 1525 ieee80211_teardown_sdata(sdata);
34d4bc4d 1526
2ca27bcf 1527 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1528 if (ret)
a9865538 1529 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1530
3a25a8c8
JB		 1531 /*
1532 * Ignore return value here, there's not much we can do since
1533 * the driver changed the interface type internally already.
1534 * The warnings will hopefully make driver authors fix it :-)
1535 */
a9865538 1536 ieee80211_check_queues(sdata, type);
3a25a8c8 1537
34d4bc4d
JB		 1538 ieee80211_setup_sdata(sdata, type);
1539
f142c6b9 1540 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1541 WARN(err, "type change: do_open returned %d", err);
1542
1543 return ret;
1544}
1545
f3947e2d 1546int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1547 enum nl80211_iftype type)
75636525 1548{
34d4bc4d
JB		 1549 int ret;
1550
f3947e2d
JB		 1551 ASSERT_RTNL();
1552
2ca27bcf 1553 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1554 return 0;
1555
34d4bc4d
JB		 1556 if (ieee80211_sdata_running(sdata)) {
1557 ret = ieee80211_runtime_change_iftype(sdata, type);
1558 if (ret)
1559 return ret;
1560 } else {
1561 /* Purge and reset type-dependent state. */
f142c6b9 1562 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1563 ieee80211_setup_sdata(sdata, type);
1564 }
75636525
JB		 1565
1566 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1567 if (type == NL80211_IFTYPE_STATION)
1568 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1569
1570 return 0;
f0706e82
JB		 1571}
1572
fa9029f8 1573static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1574 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1575{
1576 struct ieee80211_sub_if_data *sdata;
1577 u64 mask, start, addr, val, inc;
1578 u8 *m;
1579 u8 tmp_addr[ETH_ALEN];
1580 int i;
1581
1582 /* default ... something at least */
f142c6b9 1583 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1584
1585 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1586 local->hw.wiphy->n_addresses <= 1)
1587 return;
1588
fa9029f8
JB		 1589 mutex_lock(&local->iflist_mtx);
1590
1591 switch (type) {
1592 case NL80211_IFTYPE_MONITOR:
1593 /* doesn't matter */
1594 break;
1595 case NL80211_IFTYPE_WDS:
1596 case NL80211_IFTYPE_AP_VLAN:
1597 /* match up with an AP interface */
1598 list_for_each_entry(sdata, &local->interfaces, list) {
1599 if (sdata->vif.type != NL80211_IFTYPE_AP)
1600 continue;
f142c6b9 1601 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1602 break;
1603 }
1604 /* keep default if no AP interface present */
1605 break;
6d71117a
JB		 1606 case NL80211_IFTYPE_P2P_CLIENT:
1607 case NL80211_IFTYPE_P2P_GO:
30686bf7 1608 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
6d71117a
JB		 1609 list_for_each_entry(sdata, &local->interfaces, list) {
1610 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1611 continue;
1612 if (!ieee80211_sdata_running(sdata))
1613 continue;
1614 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1615 goto out_unlock;
1616 }
1617 }
1618 /* otherwise fall through */
fa9029f8
JB		 1619 default:
1620 /* assign a new address if possible -- try n_addresses first */
1621 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1622 bool used = false;
1623
1624 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1625 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1626 sdata->vif.addr)) {
fa9029f8
JB		 1627 used = true;
1628 break;
1629 }
1630 }
1631
1632 if (!used) {
f142c6b9 1633 memcpy(perm_addr,
fa9029f8
JB		 1634 local->hw.wiphy->addresses[i].addr,
1635 ETH_ALEN);
1636 break;
1637 }
1638 }
1639
1640 /* try mask if available */
1641 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1642 break;
1643
1644 m = local->hw.wiphy->addr_mask;
1645 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1646 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1647 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1648
1649 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1650 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1651 pr_info("not contiguous\n");
fa9029f8
JB		 1652 break;
1653 }
1654
ac20976d
HS		 1655 /*
1656 * Pick address of existing interface in case user changed
1657 * MAC address manually, default to perm_addr.
1658 */
fa9029f8 1659 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1660 list_for_each_entry(sdata, &local->interfaces, list) {
1661 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1662 continue;
1663 m = sdata->vif.addr;
1664 break;
1665 }
fa9029f8
JB		 1666 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1667 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1668 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1669
1670 inc = 1ULL<<__ffs64(mask);
1671 val = (start & mask);
1672 addr = (start & ~mask) | (val & mask);
1673 do {
1674 bool used = false;
1675
1676 tmp_addr[5] = addr >> 0*8;
1677 tmp_addr[4] = addr >> 1*8;
1678 tmp_addr[3] = addr >> 2*8;
1679 tmp_addr[2] = addr >> 3*8;
1680 tmp_addr[1] = addr >> 4*8;
1681 tmp_addr[0] = addr >> 5*8;
1682
1683 val += inc;
1684
1685 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1686 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1687 used = true;
1688 break;
1689 }
1690 }
1691
1692 if (!used) {
f142c6b9 1693 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1694 break;
1695 }
1696 addr = (start & ~mask) | (val & mask);
1697 } while (addr != start);
1698
1699 break;
1700 }
1701
6d71117a 1702 out_unlock:
fa9029f8
JB		 1703 mutex_unlock(&local->iflist_mtx);
1704}
1705
3e122be0 1706int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1707 unsigned char name_assign_type,
84efbb84 1708 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1709 struct vif_params *params)
f0706e82 1710{
f142c6b9 1711 struct net_device *ndev = NULL;
f0706e82 1712 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1713 struct txq_info *txqi;
80a83cfc 1714 void (*if_setup)(struct net_device *dev);
75636525 1715 int ret, i;
ded81f6b 1716 int txqs = 1;
f0706e82
JB		 1717
1718 ASSERT_RTNL();
75636525 1719
f142c6b9
JB		 1720 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1721 struct wireless_dev *wdev;
1722
1723 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1724 GFP_KERNEL);
1725 if (!sdata)
1726 return -ENOMEM;
1727 wdev = &sdata->wdev;
1728
1729 sdata->dev = NULL;
1730 strlcpy(sdata->name, name, IFNAMSIZ);
1731 ieee80211_assign_perm_addr(local, wdev->address, type);
1732 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1733 } else {
ba8c3d6f
FF		 1734 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1735 sizeof(void *));
1736 int txq_size = 0;
1737
1738 if (local->ops->wake_tx_queue)
1739 txq_size += sizeof(struct txq_info) +
1740 local->hw.txq_data_size;
1741
80a83cfc
MK		 1742 if (local->ops->wake_tx_queue)
1743 if_setup = ieee80211_if_setup_no_queue;
1744 else
1745 if_setup = ieee80211_if_setup;
1746
f142c6b9
JB		 1747 if (local->hw.queues >= IEEE80211_NUM_ACS)
1748 txqs = IEEE80211_NUM_ACS;
1749
ba8c3d6f 1750 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1751 name, name_assign_type,
80a83cfc 1752 if_setup, txqs, 1);
f142c6b9
JB		 1753 if (!ndev)
1754 return -ENOMEM;
1755 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1756
5a490510
JB		 1757 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1758 if (!ndev->tstats) {
1759 free_netdev(ndev);
1760 return -ENOMEM;
1761 }
1762
f142c6b9
JB		 1763 ndev->needed_headroom = local->tx_headroom +
1764 4*6 /* four MAC addresses */
1765 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1766 + 6 /* mesh */
1767 + 8 /* rfc1042/bridge tunnel */
1768 - ETH_HLEN /* ethernet hard_header_len */
1769 + IEEE80211_ENCRYPT_HEADROOM;
1770 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1771
1772 ret = dev_alloc_name(ndev, ndev->name);
1773 if (ret < 0) {
e6436be2 1774 ieee80211_if_free(ndev);
f142c6b9
JB		 1775 return ret;
1776 }
1777
1778 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1779 if (params && is_valid_ether_addr(params->macaddr))
1780 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1781 else
1782 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1783 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1784
1785 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1786 sdata = netdev_priv(ndev);
1787 ndev->ieee80211_ptr = &sdata->wdev;
1788 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1789 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1790
ba8c3d6f
FF		 1791 if (txq_size) {
1792 txqi = netdev_priv(ndev) + size;
fa962b92 1793 ieee80211_txq_init(sdata, NULL, txqi, 0);
ba8c3d6f
FF		 1794 }
1795
f142c6b9
JB		 1796 sdata->dev = ndev;
1797 }
75636525
JB		 1798
1799 /* initialise type-independent data */
f0706e82 1800 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1801 sdata->local = local;
75636525
JB		 1802
1803 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1804 skb_queue_head_init(&sdata->fragments[i].skb_list);
1805
1806 INIT_LIST_HEAD(&sdata->key_list);
1807
164eb02d
SW		 1808 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1809 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1810 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1811 ieee80211_delayed_tailroom_dec);
97f97b1f 1812
57fbcce3 1813 for (i = 0; i < NUM_NL80211_BANDS; i++) {
37eb0b16
JM		 1814 struct ieee80211_supported_band *sband;
1815 sband = local->hw.wiphy->bands[i];
1816 sdata->rc_rateidx_mask[i] =
1817 sband ? (1 << sband->n_bitrates) - 1 : 0;
b119ad6e
LB		 1818 if (sband) {
1819 __le16 cap;
1820 u16 *vht_rate_mask;
1821
19468413
SW		 1822 memcpy(sdata->rc_rateidx_mcs_mask[i],
1823 sband->ht_cap.mcs.rx_mask,
1824 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1825
1826 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1827 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1828 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1829 } else {
19468413
SW		 1830 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1831 sizeof(sdata->rc_rateidx_mcs_mask[i]));
b119ad6e
LB		 1832 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1833 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1834 }
37eb0b16 1835 }
75636525 1836
3a25a8c8
JB		 1837 ieee80211_set_default_queues(sdata);
1838
1ea6f9c0
JB		 1839 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1840 sdata->user_power_level = local->user_power_level;
1841
2475b1cc
MS		 1842 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1843
75636525
JB		 1844 /* setup type-dependent data */
1845 ieee80211_setup_sdata(sdata, type);
f0706e82 1846
f142c6b9
JB		 1847 if (ndev) {
1848 if (params) {
1849 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1850 if (type == NL80211_IFTYPE_STATION)
1851 sdata->u.mgd.use_4addr = params->use_4addr;
1852 }
9bc383de 1853
f142c6b9 1854 ndev->features |= local->hw.netdev_features;
72d78728 1855
b7ffbd7e
JB		 1856 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1857
f142c6b9
JB		 1858 ret = register_netdevice(ndev);
1859 if (ret) {
e6436be2 1860 ieee80211_if_free(ndev);
f142c6b9
JB		 1861 return ret;
1862 }
1863 }
f0706e82 1864
c771c9d8 1865 mutex_lock(&local->iflist_mtx);
79010420 1866 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1867 mutex_unlock(&local->iflist_mtx);
79010420 1868
84efbb84
JB		 1869 if (new_wdev)
1870 *new_wdev = &sdata->wdev;
f0706e82 1871
f0706e82 1872 return 0;
f0706e82
JB		 1873}
1874
f698d856 1875void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1876{
f0706e82 1877 ASSERT_RTNL();
11a843b7 1878
c771c9d8 1879 mutex_lock(&sdata->local->iflist_mtx);
75636525 1880 list_del_rcu(&sdata->list);
c771c9d8
JB		 1881 mutex_unlock(&sdata->local->iflist_mtx);
1882
75636525 1883 synchronize_rcu();
f142c6b9
JB		 1884
1885 if (sdata->dev) {
1886 unregister_netdevice(sdata->dev);
1887 } else {
1888 cfg80211_unregister_wdev(&sdata->wdev);
835112b2 1889 ieee80211_teardown_sdata(sdata);
f142c6b9
JB		 1890 kfree(sdata);
1891 }
1892}
1893
1894void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1895{
1896 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1897 return;
1898 ieee80211_do_stop(sdata, true);
f0706e82
JB		 1899}
1900
75636525 1901void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1902{
75636525 1903 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1904 LIST_HEAD(unreg_list);
f142c6b9 1905 LIST_HEAD(wdev_list);
f0706e82
JB		 1906
1907 ASSERT_RTNL();
1908
d8d9008c
JB		 1909 /* Before destroying the interfaces, make sure they're all stopped so
1910 * that the hardware is stopped. Otherwise, the driver might still be
1911 * iterating the interfaces during the shutdown, e.g. from a worker
1912 * or from RX processing or similar, and if it does so (using atomic
1913 * iteration) while we're manipulating the list, the iteration will
1914 * crash.
1915 *
1916 * After this, the hardware should be stopped and the driver should
1917 * have stopped all of its activities, so that we can do RCU-unaware
1918 * manipulations of the interface list below.
c8aa22db 1919 */
d8d9008c
JB		 1920 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1921
1922 WARN(local->open_count, "%s: open count remains %d\n",
1923 wiphy_name(local->hw.wiphy), local->open_count);
c8aa22db 1924
efe117ab 1925 mutex_lock(&local->iflist_mtx);
75636525
JB		 1926 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1927 list_del(&sdata->list);
c771c9d8 1928
f142c6b9
JB		 1929 if (sdata->dev)
1930 unregister_netdevice_queue(sdata->dev, &unreg_list);
1931 else
1932 list_add(&sdata->list, &wdev_list);
f0706e82 1933 }
efe117ab
ED		 1934 mutex_unlock(&local->iflist_mtx);
1935 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1936
1937 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1938 list_del(&sdata->list);
1939 cfg80211_unregister_wdev(&sdata->wdev);
1940 kfree(sdata);
1941 }
f0706e82 1942}
5cff20e6 1943
47846c9b 1944static int netdev_notify(struct notifier_block *nb,
351638e7 1945 unsigned long state, void *ptr)
47846c9b 1946{
351638e7 1947 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1948 struct ieee80211_sub_if_data *sdata;
1949
1950 if (state != NETDEV_CHANGENAME)
8bd811aa 1951 return NOTIFY_DONE;
47846c9b
JB		 1952
1953 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1954 return NOTIFY_DONE;
47846c9b
JB		 1955
1956 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1957 return NOTIFY_DONE;
47846c9b
JB		 1958
1959 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1960 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1961 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1962
1963 return NOTIFY_OK;
47846c9b
JB		 1964}
1965
1966static struct notifier_block mac80211_netdev_notifier = {
1967 .notifier_call = netdev_notify,
1968};
1969
1970int ieee80211_iface_init(void)
1971{
1972 return register_netdevice_notifier(&mac80211_netdev_notifier);
1973}
1974
1975void ieee80211_iface_exit(void)
1976{
1977 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1978}
Linux 6.x block layer and io_uring tree(s)