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mac80211: don't update dev->trans_start
[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{
db82d8a9 79 if (__ieee80211_recalc_txpower(sdata) || update_bss)
1ea6f9c0
JB		 80 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
81}
c771c9d8 82
62a40a15 83static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 84{
85 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
86 return 0;
87
88 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
89 return IEEE80211_CONF_CHANGE_IDLE;
90}
91
62a40a15 92static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 93{
94 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
95 return 0;
96
3b24f4c6 97 ieee80211_flush_queues(local, NULL, false);
cc45ae54
JB		 98
99 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
100 return IEEE80211_CONF_CHANGE_IDLE;
101}
102
62a40a15
JB		 103static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
104 bool force_active)
cc45ae54 105{
1d5e1266 106 bool working, scanning, active;
cc45ae54 107 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 108
cc45ae54
JB		 109 lockdep_assert_held(&local->mtx);
110
62a40a15
JB		 111 active = force_active ||
112 !list_empty(&local->chanctx_list) ||
113 local->monitors;
cc45ae54 114
1d5e1266
JB		 115 working = !local->ops->remain_on_channel &&
116 !list_empty(&local->roc_list);
cc45ae54 117
f1e3e051
JB		 118 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
119 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 120
cc45ae54
JB		 121 if (working || scanning)
122 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
123 else
124 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125
fd0f979a 126 if (active)
cc45ae54
JB		 127 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
128 else
129 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130
131 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
132
fd0f979a 133 if (working || scanning || active)
62a40a15
JB		 134 return __ieee80211_idle_off(local);
135 return __ieee80211_idle_on(local);
136}
137
138u32 ieee80211_idle_off(struct ieee80211_local *local)
139{
140 return __ieee80211_recalc_idle(local, true);
141}
142
143void ieee80211_recalc_idle(struct ieee80211_local *local)
144{
145 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 146 if (change)
147 ieee80211_hw_config(local, change);
cc45ae54
JB		 148}
149
0d143fe1
JB		 150static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
151{
09b1426e 152 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 153 return -EINVAL;
0d143fe1 154
0d143fe1
JB		 155 dev->mtu = new_mtu;
156 return 0;
157}
158
3899ba90 159static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 160 bool check_dup)
478622e8 161{
ac20976d
HS		 162 struct ieee80211_local *local = sdata->local;
163 struct ieee80211_sub_if_data *iter;
478622e8
HS		 164 u64 new, mask, tmp;
165 u8 *m;
166 int ret = 0;
167
168 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
169 return 0;
170
171 m = addr;
172 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
175
176 m = local->hw.wiphy->addr_mask;
177 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
178 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
179 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
180
31eba5bc
FF		 181 if (!check_dup)
182 return ret;
478622e8
HS		 183
184 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 185 list_for_each_entry(iter, &local->interfaces, list) {
186 if (iter == sdata)
478622e8
HS		 187 continue;
188
3899ba90
JL		 189 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
190 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 191 continue;
192
ac20976d 193 m = iter->vif.addr;
478622e8
HS		 194 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
195 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
196 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
197
198 if ((new & ~mask) != (tmp & ~mask)) {
199 ret = -EINVAL;
200 break;
201 }
202 }
203 mutex_unlock(&local->iflist_mtx);
204
205 return ret;
206}
207
47846c9b
JB		 208static int ieee80211_change_mac(struct net_device *dev, void *addr)
209{
210 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 211 struct sockaddr *sa = addr;
31eba5bc 212 bool check_dup = true;
47846c9b
JB		 213 int ret;
214
9607e6b6 215 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 216 return -EBUSY;
217
31eba5bc
FF		 218 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
219 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
220 check_dup = false;
221
3899ba90 222 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 223 if (ret)
224 return ret;
225
fc5f7577 226 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 227
228 if (ret == 0)
fc5f7577 229 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 230
231 return ret;
232}
233
0d143fe1
JB		 234static inline int identical_mac_addr_allowed(int type1, int type2)
235{
236 return type1 == NL80211_IFTYPE_MONITOR ||
237 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 238 type1 == NL80211_IFTYPE_P2P_DEVICE ||
239 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 240 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
241 (type1 == NL80211_IFTYPE_WDS &&
242 (type2 == NL80211_IFTYPE_WDS ||
243 type2 == NL80211_IFTYPE_AP)) ||
244 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
245 (type1 == NL80211_IFTYPE_AP_VLAN &&
246 (type2 == NL80211_IFTYPE_AP ||
247 type2 == NL80211_IFTYPE_AP_VLAN));
248}
249
87490f6d
JB		 250static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
251 enum nl80211_iftype iftype)
0d143fe1 252{
b4a4bf5d 253 struct ieee80211_local *local = sdata->local;
87490f6d 254 struct ieee80211_sub_if_data *nsdata;
b6a55015 255 int ret;
0d143fe1 256
87490f6d 257 ASSERT_RTNL();
0d143fe1
JB		 258
259 /* we hold the RTNL here so can safely walk the list */
260 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 261 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
239281f8
RL		 262 /*
263 * Only OCB and monitor mode may coexist
264 */
265 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
266 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
267 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
268 nsdata->vif.type == NL80211_IFTYPE_OCB))
269 return -EBUSY;
270
0d143fe1
JB		 271 /*
272 * Allow only a single IBSS interface to be up at any
273 * time. This is restricted because beacon distribution
274 * cannot work properly if both are in the same IBSS.
275 *
276 * To remove this restriction we'd have to disallow them
277 * from setting the same SSID on different IBSS interfaces
278 * belonging to the same hardware. Then, however, we're
279 * faced with having to adopt two different TSF timers...
280 */
87490f6d 281 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 282 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
283 return -EBUSY;
73da7d5b
SW		 284 /*
285 * will not add another interface while any channel
286 * switch is active.
287 */
288 if (nsdata->vif.csa_active)
289 return -EBUSY;
0d143fe1
JB		 290
291 /*
292 * The remaining checks are only performed for interfaces
293 * with the same MAC address.
294 */
371a255e
JB		 295 if (!ether_addr_equal(sdata->vif.addr,
296 nsdata->vif.addr))
0d143fe1
JB		 297 continue;
298
299 /*
300 * check whether it may have the same address
301 */
87490f6d 302 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 303 nsdata->vif.type))
304 return -ENOTUNIQ;
305
306 /*
307 * can only add VLANs to enabled APs
308 */
87490f6d 309 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 310 nsdata->vif.type == NL80211_IFTYPE_AP)
311 sdata->bss = &nsdata->u.ap;
312 }
313 }
314
b6a55015
LC		 315 mutex_lock(&local->chanctx_mtx);
316 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
317 mutex_unlock(&local->chanctx_mtx);
318 return ret;
87490f6d
JB		 319}
320
a9865538
JB		 321static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
322 enum nl80211_iftype iftype)
3a25a8c8
JB		 323{
324 int n_queues = sdata->local->hw.queues;
325 int i;
326
a9865538 327 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 328 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
329 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
330 IEEE80211_INVAL_HW_QUEUE))
331 return -EINVAL;
332 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
333 n_queues))
334 return -EINVAL;
335 }
3a25a8c8
JB		 336 }
337
a9865538
JB		 338 if ((iftype != NL80211_IFTYPE_AP &&
339 iftype != NL80211_IFTYPE_P2P_GO &&
340 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 341 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 342 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
343 return 0;
344 }
345
346 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
347 return -EINVAL;
348
349 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
350 return -EINVAL;
351
352 return 0;
353}
354
85416a4f
CL		 355void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
356 const int offset)
357{
358 struct ieee80211_local *local = sdata->local;
359 u32 flags = sdata->u.mntr_flags;
360
361#define ADJUST(_f, _s) do { \
362 if (flags & MONITOR_FLAG_##_f) \
363 local->fif_##_s += offset; \
364 } while (0)
365
366 ADJUST(FCSFAIL, fcsfail);
367 ADJUST(PLCPFAIL, plcpfail);
368 ADJUST(CONTROL, control);
369 ADJUST(CONTROL, pspoll);
370 ADJUST(OTHER_BSS, other_bss);
371
372#undef ADJUST
373}
374
3a25a8c8
JB		 375static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
376{
377 struct ieee80211_local *local = sdata->local;
378 int i;
379
380 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
381 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
382 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 383 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 384 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 385 else
386 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 387 }
388 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
389}
390
3c3e21e7 391int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 392{
393 struct ieee80211_sub_if_data *sdata;
8b305780 394 int ret;
4b6f1dd6
JB		 395
396 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
397 return 0;
398
8b305780 399 ASSERT_RTNL();
685fb72b 400
4b6f1dd6 401 if (local->monitor_sdata)
8b305780 402 return 0;
4b6f1dd6
JB		 403
404 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 405 if (!sdata)
406 return -ENOMEM;
4b6f1dd6
JB		 407
408 /* set up data */
409 sdata->local = local;
410 sdata->vif.type = NL80211_IFTYPE_MONITOR;
411 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
412 wiphy_name(local->hw.wiphy));
34171dc0 413 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 414
2475b1cc
MS		 415 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
416
3a25a8c8
JB		 417 ieee80211_set_default_queues(sdata);
418
4b6f1dd6
JB		 419 ret = drv_add_interface(local, sdata);
420 if (WARN_ON(ret)) {
421 /* ok .. stupid driver, it asked for this! */
422 kfree(sdata);
8b305780 423 return ret;
4b6f1dd6
JB		 424 }
425
a9865538 426 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 427 if (ret) {
428 kfree(sdata);
8b305780 429 return ret;
3a25a8c8
JB		 430 }
431
fab57a6c
JB		 432 mutex_lock(&local->iflist_mtx);
433 rcu_assign_pointer(local->monitor_sdata, sdata);
434 mutex_unlock(&local->iflist_mtx);
435
34a3740d 436 mutex_lock(&local->mtx);
4bf88530 437 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 438 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 439 mutex_unlock(&local->mtx);
55de908a 440 if (ret) {
fab57a6c 441 mutex_lock(&local->iflist_mtx);
0c2bef46 442 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 443 mutex_unlock(&local->iflist_mtx);
444 synchronize_net();
55de908a
JB		 445 drv_remove_interface(local, sdata);
446 kfree(sdata);
8b305780 447 return ret;
55de908a
JB		 448 }
449
8b305780 450 return 0;
4b6f1dd6
JB		 451}
452
3c3e21e7 453void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 454{
455 struct ieee80211_sub_if_data *sdata;
456
457 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
458 return;
459
8b305780
JB		 460 ASSERT_RTNL();
461
685fb72b 462 mutex_lock(&local->iflist_mtx);
4b6f1dd6 463
685fb72b
JB		 464 sdata = rcu_dereference_protected(local->monitor_sdata,
465 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 466 if (!sdata) {
467 mutex_unlock(&local->iflist_mtx);
468 return;
469 }
4b6f1dd6 470
0c2bef46 471 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 472 mutex_unlock(&local->iflist_mtx);
473
4b6f1dd6
JB		 474 synchronize_net();
475
34a3740d 476 mutex_lock(&local->mtx);
55de908a 477 ieee80211_vif_release_channel(sdata);
34a3740d 478 mutex_unlock(&local->mtx);
55de908a 479
4b6f1dd6
JB		 480 drv_remove_interface(local, sdata);
481
482 kfree(sdata);
483}
484
34d4bc4d
JB		 485/*
486 * NOTE: Be very careful when changing this function, it must NOT return
487 * an error on interface type changes that have been pre-checked, so most
488 * checks should be in ieee80211_check_concurrent_iface.
489 */
f142c6b9 490int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 491{
f142c6b9
JB		 492 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
493 struct net_device *dev = wdev->netdev;
87490f6d
JB		 494 struct ieee80211_local *local = sdata->local;
495 struct sta_info *sta;
496 u32 changed = 0;
497 int res;
498 u32 hw_reconf_flags = 0;
499
0d143fe1
JB		 500 switch (sdata->vif.type) {
501 case NL80211_IFTYPE_WDS:
502 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
503 return -ENOLINK;
504 break;
665c93a9
JB		 505 case NL80211_IFTYPE_AP_VLAN: {
506 struct ieee80211_sub_if_data *master;
507
0d143fe1
JB		 508 if (!sdata->bss)
509 return -ENOLINK;
665c93a9 510
4e141dad 511 mutex_lock(&local->mtx);
0d143fe1 512 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 513 mutex_unlock(&local->mtx);
665c93a9
JB		 514
515 master = container_of(sdata->bss,
516 struct ieee80211_sub_if_data, u.ap);
517 sdata->control_port_protocol =
518 master->control_port_protocol;
519 sdata->control_port_no_encrypt =
520 master->control_port_no_encrypt;
1351c5d3
JB		 521 sdata->vif.cab_queue = master->vif.cab_queue;
522 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
523 sizeof(sdata->vif.hw_queue));
2967e031 524 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
0d143fe1 525 break;
665c93a9 526 }
0d143fe1
JB		 527 case NL80211_IFTYPE_AP:
528 sdata->bss = &sdata->u.ap;
529 break;
530 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 531 case NL80211_IFTYPE_STATION:
532 case NL80211_IFTYPE_MONITOR:
533 case NL80211_IFTYPE_ADHOC:
f142c6b9 534 case NL80211_IFTYPE_P2P_DEVICE:
6e0bd6c3 535 case NL80211_IFTYPE_OCB:
0d143fe1
JB		 536 /* no special treatment */
537 break;
538 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 539 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 540 case NL80211_IFTYPE_P2P_CLIENT:
541 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 542 /* cannot happen */
543 WARN_ON(1);
544 break;
545 }
546
547 if (local->open_count == 0) {
24487981 548 res = drv_start(local);
0d143fe1
JB		 549 if (res)
550 goto err_del_bss;
e8975581
JB		 551 /* we're brought up, everything changes */
552 hw_reconf_flags = ~0;
1f87f7d3 553 ieee80211_led_radio(local, true);
67408c8c
JB		 554 ieee80211_mod_tpt_led_trig(local,
555 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 556 }
557
558 /*
bf533e0b
JB		 559 * Copy the hopefully now-present MAC address to
560 * this interface, if it has the special null one.
0d143fe1 561 */
f142c6b9 562 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 563 memcpy(dev->dev_addr,
564 local->hw.wiphy->perm_addr,
565 ETH_ALEN);
566 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
567
568 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 569 res = -EADDRNOTAVAIL;
570 goto err_stop;
0adc23f5 571 }
0d143fe1
JB		 572 }
573
0d143fe1
JB		 574 switch (sdata->vif.type) {
575 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 576 /* no need to tell driver, but set carrier and chanctx */
577 if (rtnl_dereference(sdata->bss->beacon)) {
578 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 579 netif_carrier_on(dev);
4d76d21b 580 } else {
3edaf3e6 581 netif_carrier_off(dev);
4d76d21b 582 }
0d143fe1
JB		 583 break;
584 case NL80211_IFTYPE_MONITOR:
585 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
586 local->cooked_mntrs++;
587 break;
588 }
589
31eba5bc
FF		 590 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
591 res = drv_add_interface(local, sdata);
592 if (res)
593 goto err_stop;
594 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 595 res = ieee80211_add_virtual_monitor(local);
596 if (res)
597 goto err_stop;
598 }
599
0d143fe1
JB		 600 /* must be before the call to ieee80211_configure_filter */
601 local->monitors++;
e8975581 602 if (local->monitors == 1) {
0869aea0
JB		 603 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
604 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 605 }
0d143fe1 606
85416a4f 607 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 608 ieee80211_configure_filter(local);
801d929c
FF		 609 mutex_lock(&local->mtx);
610 ieee80211_recalc_idle(local);
611 mutex_unlock(&local->mtx);
53e9b1de
DG		 612
613 netif_carrier_on(dev);
0d143fe1 614 break;
0d143fe1 615 default:
34d4bc4d 616 if (coming_up) {
075e0847
JB		 617 ieee80211_del_virtual_monitor(local);
618
7b7eab6f 619 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 620 if (res)
621 goto err_stop;
a9865538
JB		 622 res = ieee80211_check_queues(sdata,
623 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 624 if (res)
625 goto err_del_interface;
34d4bc4d 626 }
0d143fe1 627
29cbe68c 628 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 629 local->fif_pspoll++;
7be5086d 630 local->fif_probe_req++;
e3b90ca2 631
e3b90ca2 632 ieee80211_configure_filter(local);
7be5086d
JB		 633 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
634 local->fif_probe_req++;
a3c9aa51 635 }
e3b90ca2 636
f142c6b9
JB		 637 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
638 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 639 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 640
c405c629
JB		 641 switch (sdata->vif.type) {
642 case NL80211_IFTYPE_STATION:
643 case NL80211_IFTYPE_ADHOC:
644 case NL80211_IFTYPE_AP:
645 case NL80211_IFTYPE_MESH_POINT:
6e0bd6c3 646 case NL80211_IFTYPE_OCB:
0d143fe1 647 netif_carrier_off(dev);
c405c629 648 break;
1411af15 649 case NL80211_IFTYPE_WDS:
f142c6b9 650 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 651 break;
c405c629 652 default:
a2310824
JB		 653 /* not reached */
654 WARN_ON(1);
c405c629 655 }
59034591
EP		 656
657 /*
658 * set default queue parameters so drivers don't
659 * need to initialise the hardware if the hardware
660 * doesn't start up with sane defaults
661 */
3abead59 662 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 663 }
664
2d2080c3
JB		 665 set_bit(SDATA_STATE_RUNNING, &sdata->state);
666
0d143fe1
JB		 667 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
668 /* Create STA entry for the WDS peer */
669 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
670 GFP_KERNEL);
671 if (!sta) {
672 res = -ENOMEM;
673 goto err_del_interface;
674 }
675
83d5cc01
JB		 676 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
677 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
678 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 679
680 res = sta_info_insert(sta);
681 if (res) {
682 /* STA has been freed */
683 goto err_del_interface;
684 }
1be7fe8d
BJ		 685
686 rate_control_rate_init(sta);
1411af15 687 netif_carrier_on(dev);
f142c6b9
JB		 688 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
689 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 690 }
691
0d143fe1
JB		 692 /*
693 * set_multicast_list will be invoked by the networking core
694 * which will check whether any increments here were done in
695 * error and sync them down to the hardware as filter flags.
696 */
697 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
698 atomic_inc(&local->iff_allmultis);
699
34d4bc4d
JB		 700 if (coming_up)
701 local->open_count++;
702
59034591 703 if (hw_reconf_flags)
e8975581 704 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 705
10f644a4 706 ieee80211_recalc_ps(local, -1);
965bedad 707
2b436312
JB		 708 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
709 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
710 /* XXX: for AP_VLAN, actually track AP queues */
711 netif_tx_start_all_queues(dev);
712 } else if (dev) {
2b730daa
JB		 713 unsigned long flags;
714 int n_acs = IEEE80211_NUM_ACS;
715 int ac;
716
717 if (local->hw.queues < IEEE80211_NUM_ACS)
718 n_acs = 1;
719
720 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
721 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
722 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
723 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
724 for (ac = 0; ac < n_acs; ac++) {
725 int ac_queue = sdata->vif.hw_queue[ac];
726
727 if (local->queue_stop_reasons[ac_queue] == 0 &&
728 skb_queue_empty(&local->pending[ac_queue]))
729 netif_start_subqueue(dev, ac);
730 }
731 }
732 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
733 }
0d143fe1
JB		 734
735 return 0;
736 err_del_interface:
7b7eab6f 737 drv_remove_interface(local, sdata);
0d143fe1 738 err_stop:
24487981
JB		 739 if (!local->open_count)
740 drv_stop(local);
0d143fe1
JB		 741 err_del_bss:
742 sdata->bss = NULL;
4e141dad
MK		 743 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
744 mutex_lock(&local->mtx);
0d143fe1 745 list_del(&sdata->u.vlan.list);
4e141dad
MK		 746 mutex_unlock(&local->mtx);
747 }
4d6c36fa 748 /* might already be clear but that doesn't matter */
2d2080c3 749 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 750 return res;
751}
752
34d4bc4d 753static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 754{
755 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 756 int err;
757
758 /* fail early if user set an invalid address */
2fcf2824 759 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 760 return -EADDRNOTAVAIL;
761
762 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
763 if (err)
764 return err;
765
f142c6b9 766 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 767}
768
769static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
770 bool going_down)
771{
0d143fe1 772 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 773 unsigned long flags;
774 struct sk_buff *skb, *tmp;
e8975581 775 u32 hw_reconf_flags = 0;
09f4114e 776 int i, flushed;
397a7a24 777 struct ps_data *ps;
d2859df5 778 struct cfg80211_chan_def chandef;
46238845 779 bool cancel_scan;
0d143fe1 780
c29acf20
RM		 781 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
782
46238845
JB		 783 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
784 if (cancel_scan)
352ffad6
BC		 785 ieee80211_scan_cancel(local);
786
0d143fe1
JB		 787 /*
788 * Stop TX on this interface first.
789 */
f142c6b9
JB		 790 if (sdata->dev)
791 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 792
c8f994ee 793 ieee80211_roc_purge(local, sdata);
af6b6374 794
8ffcc704
EG		 795 switch (sdata->vif.type) {
796 case NL80211_IFTYPE_STATION:
572078be 797 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 798 break;
799 case NL80211_IFTYPE_ADHOC:
cd7760e6 800 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 801 break;
802 case NL80211_IFTYPE_AP:
803 cancel_work_sync(&sdata->u.ap.request_smps_work);
804 break;
805 default:
806 break;
807 }
cd7760e6 808
0d143fe1
JB		 809 /*
810 * Remove all stations associated with this interface.
811 *
812 * This must be done before calling ops->remove_interface()
813 * because otherwise we can later invoke ops->sta_notify()
814 * whenever the STAs are removed, and that invalidates driver
815 * assumptions about always getting a vif pointer that is valid
816 * (because if we remove a STA after ops->remove_interface()
817 * the driver will have removed the vif info already!)
818 *
09f4114e
JB		 819 * This is relevant only in WDS mode, in all other modes we've
820 * already removed all stations when disconnecting or similar,
821 * so warn otherwise.
0d143fe1 822 */
d34ba216 823 flushed = sta_info_flush(sdata);
09f4114e
JB		 824 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
825 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 826
df140465 827 /* don't count this interface for allmulti while it is down */
0d143fe1
JB		 828 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
829 atomic_dec(&local->iff_allmultis);
830
7be5086d 831 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 832 local->fif_pspoll--;
7be5086d
JB		 833 local->fif_probe_req--;
834 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
835 local->fif_probe_req--;
836 }
e3b90ca2 837
f142c6b9
JB		 838 if (sdata->dev) {
839 netif_addr_lock_bh(sdata->dev);
840 spin_lock_bh(&local->filter_lock);
841 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
842 sdata->dev->addr_len);
843 spin_unlock_bh(&local->filter_lock);
844 netif_addr_unlock_bh(sdata->dev);
f142c6b9 845 }
3ac64bee 846
7cbf0ba5
VN		 847 del_timer_sync(&local->dynamic_ps_timer);
848 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 849
04ecd257 850 cancel_work_sync(&sdata->recalc_smps);
dbd72850 851 sdata_lock(sdata);
59af6928 852 mutex_lock(&local->mtx);
73da7d5b 853 sdata->vif.csa_active = false;
0c21e632
LC		 854 if (sdata->vif.type == NL80211_IFTYPE_STATION)
855 sdata->u.mgd.csa_waiting_bcn = false;
a46992b4
LC		 856 if (sdata->csa_block_tx) {
857 ieee80211_wake_vif_queues(local, sdata,
858 IEEE80211_QUEUE_STOP_REASON_CSA);
859 sdata->csa_block_tx = false;
860 }
59af6928 861 mutex_unlock(&local->mtx);
dbd72850 862 sdata_unlock(sdata);
59af6928 863
73da7d5b 864 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 865
164eb02d
SW		 866 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
867
868 if (sdata->wdev.cac_started) {
d2859df5 869 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 870 WARN_ON(local->suspended);
34a3740d 871 mutex_lock(&local->mtx);
164eb02d 872 ieee80211_vif_release_channel(sdata);
34a3740d 873 mutex_unlock(&local->mtx);
d2859df5
JD		 874 cfg80211_cac_event(sdata->dev, &chandef,
875 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 876 GFP_KERNEL);
877 }
878
0d143fe1
JB		 879 /* APs need special treatment */
880 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 881 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 882
883 /* down all dependent devices, that is VLANs */
57c9fff3 884 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 885 u.vlan.list)
886 dev_close(vlan->dev);
887 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 888 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
889 /* remove all packets in parent bc_buf pointing to this dev */
890 ps = &sdata->bss->ps;
891
892 spin_lock_irqsave(&ps->bc_buf.lock, flags);
893 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
894 if (skb->dev == sdata->dev) {
895 __skb_unlink(skb, &ps->bc_buf);
896 local->total_ps_buffered--;
897 ieee80211_free_txskb(&local->hw, skb);
898 }
899 }
900 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 901 }
902
34d4bc4d
JB		 903 if (going_down)
904 local->open_count--;
0d143fe1
JB		 905
906 switch (sdata->vif.type) {
907 case NL80211_IFTYPE_AP_VLAN:
4e141dad 908 mutex_lock(&local->mtx);
0d143fe1 909 list_del(&sdata->u.vlan.list);
4e141dad 910 mutex_unlock(&local->mtx);
0c2bef46 911 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 912 /* see comment in the default case below */
913 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 914 /* no need to tell driver */
915 break;
916 case NL80211_IFTYPE_MONITOR:
917 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
918 local->cooked_mntrs--;
919 break;
920 }
921
922 local->monitors--;
e8975581 923 if (local->monitors == 0) {
0869aea0
JB		 924 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
925 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 926 }
0d143fe1 927
85416a4f 928 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 929 break;
f142c6b9
JB		 930 case NL80211_IFTYPE_P2P_DEVICE:
931 /* relies on synchronize_rcu() below */
0c2bef46 932 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 933 /* fall through */
0d143fe1 934 default:
0b7dff4f 935 cancel_work_sync(&sdata->work);
35f20c14
JB		 936 /*
937 * When we get here, the interface is marked down.
7907c7d3 938 * Free the remaining keys, if there are any
10b68487
FF		 939 * (which can happen in AP mode if userspace sets
940 * keys before the interface is operating, and maybe
941 * also in WDS mode)
75de9113 942 *
7907c7d3
JB		 943 * Force the key freeing to always synchronize_net()
944 * to wait for the RX path in case it is using this
10b68487 945 * interface enqueuing frames at this very time on
75de9113 946 * another CPU.
35f20c14 947 */
7907c7d3 948 ieee80211_free_keys(sdata, true);
1861b845 949 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 950 }
951
952 sdata->bss = NULL;
953
5061b0c2
JB		 954 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
955 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
956 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
957 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
958 if (info->control.vif == &sdata->vif) {
959 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 960 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 961 }
962 }
963 }
964 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 965
ba8c3d6f
FF		 966 if (sdata->vif.txq) {
967 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
968
969 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
970 atomic_set(&sdata->txqs_len[txqi->txq.ac], 0);
971 }
972
b2c0958b
JB		 973 if (local->open_count == 0)
974 ieee80211_clear_tx_pending(local);
975
976 /*
977 * If the interface goes down while suspended, presumably because
978 * the device was unplugged and that happens before our resume,
979 * then the driver is already unconfigured and the remainder of
980 * this function isn't needed.
981 * XXX: what about WoWLAN? If the device has software state, e.g.
982 * memory allocated, it might expect teardown commands from
983 * mac80211 here?
984 */
985 if (local->suspended) {
986 WARN_ON(local->wowlan);
987 WARN_ON(rtnl_dereference(local->monitor_sdata));
988 return;
989 }
990
991 switch (sdata->vif.type) {
992 case NL80211_IFTYPE_AP_VLAN:
993 break;
994 case NL80211_IFTYPE_MONITOR:
995 if (local->monitors == 0)
996 ieee80211_del_virtual_monitor(local);
997
998 mutex_lock(&local->mtx);
999 ieee80211_recalc_idle(local);
1000 mutex_unlock(&local->mtx);
31eba5bc
FF		 1001
1002 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1003 break;
1004
1005 /* fall through */
b2c0958b
JB		 1006 default:
1007 if (going_down)
1008 drv_remove_interface(local, sdata);
1009 }
1010
1011 ieee80211_recalc_ps(local, -1);
1012
46238845
JB		 1013 if (cancel_scan)
1014 flush_delayed_work(&local->scan_work);
1015
b2c0958b
JB		 1016 if (local->open_count == 0) {
1017 ieee80211_stop_device(local);
1018
1019 /* no reconfiguring after stop! */
1020 return;
1021 }
1022
1023 /* do after stop to avoid reconfiguring when we stop anyway */
1024 ieee80211_configure_filter(local);
1025 ieee80211_hw_config(local, hw_reconf_flags);
1026
1027 if (local->monitors == local->open_count)
075e0847 1028 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1029}
1030
1031static int ieee80211_stop(struct net_device *dev)
1032{
1033 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1034
1035 ieee80211_do_stop(sdata, true);
5061b0c2 1036
0d143fe1
JB		 1037 return 0;
1038}
1039
1040static void ieee80211_set_multicast_list(struct net_device *dev)
1041{
0d143fe1 1042 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1043 struct ieee80211_local *local = sdata->local;
df140465 1044 int allmulti, sdata_allmulti;
0d143fe1
JB		 1045
1046 allmulti = !!(dev->flags & IFF_ALLMULTI);
0d143fe1 1047 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
0d143fe1
JB		 1048
1049 if (allmulti != sdata_allmulti) {
1050 if (dev->flags & IFF_ALLMULTI)
1051 atomic_inc(&local->iff_allmultis);
1052 else
1053 atomic_dec(&local->iff_allmultis);
1054 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1055 }
1056
3b8d81e0 1057 spin_lock_bh(&local->filter_lock);
22bedad3 1058 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1059 spin_unlock_bh(&local->filter_lock);
3ac64bee 1060 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1061}
1062
75636525
JB		 1063/*
1064 * Called when the netdev is removed or, by the code below, before
1065 * the interface type changes.
1066 */
f142c6b9 1067static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1068{
1069 int i;
1070
75636525 1071 /* free extra data */
7907c7d3 1072 ieee80211_free_keys(sdata, false);
75636525 1073
aee14ceb
JM		 1074 ieee80211_debugfs_remove_netdev(sdata);
1075
f0706e82 1076 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1077 __skb_queue_purge(&sdata->fragments[i].skb_list);
1078 sdata->fragment_next = 0;
11a843b7 1079
b9dcf712
JB		 1080 if (ieee80211_vif_is_mesh(&sdata->vif))
1081 mesh_rmc_free(sdata);
f0706e82
JB		 1082}
1083
f142c6b9
JB		 1084static void ieee80211_uninit(struct net_device *dev)
1085{
1086 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1087}
1088
cf0277e7 1089static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1090 struct sk_buff *skb,
99932d4f
DB		 1091 void *accel_priv,
1092 select_queue_fallback_t fallback)
cf0277e7
JB		 1093{
1094 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1095}
1096
587e729e
JB		 1097static const struct net_device_ops ieee80211_dataif_ops = {
1098 .ndo_open = ieee80211_open,
1099 .ndo_stop = ieee80211_stop,
f142c6b9 1100 .ndo_uninit = ieee80211_uninit,
587e729e 1101 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1102 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1103 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1104 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1105 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1106};
1107
cf0277e7 1108static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1109 struct sk_buff *skb,
99932d4f
DB		 1110 void *accel_priv,
1111 select_queue_fallback_t fallback)
cf0277e7
JB		 1112{
1113 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1114 struct ieee80211_local *local = sdata->local;
1115 struct ieee80211_hdr *hdr;
1116 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1117
32c5057b 1118 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1119 return 0;
1120
1121 if (skb->len < 4 ||
b49bb574 1122 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1123 return 0; /* doesn't matter, frame will be dropped */
1124
b49bb574 1125 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1126
00e96dec 1127 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1128}
1129
587e729e
JB		 1130static const struct net_device_ops ieee80211_monitorif_ops = {
1131 .ndo_open = ieee80211_open,
1132 .ndo_stop = ieee80211_stop,
f142c6b9 1133 .ndo_uninit = ieee80211_uninit,
587e729e 1134 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1135 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1136 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1137 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1138 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1139};
1140
1141static void ieee80211_if_setup(struct net_device *dev)
1142{
1143 ether_setup(dev);
550fd08c 1144 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1145 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1146 dev->destructor = free_netdev;
1147}
1148
1fa57d01
JB		 1149static void ieee80211_iface_work(struct work_struct *work)
1150{
1151 struct ieee80211_sub_if_data *sdata =
1152 container_of(work, struct ieee80211_sub_if_data, work);
1153 struct ieee80211_local *local = sdata->local;
1154 struct sk_buff *skb;
344eec67 1155 struct sta_info *sta;
c1475ca9 1156 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1157 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1158
1159 if (!ieee80211_sdata_running(sdata))
1160 return;
1161
1162 if (local->scanning)
1163 return;
1164
4afaff17 1165 if (!ieee80211_can_run_worker(local))
1fa57d01
JB		 1166 return;
1167
1168 /* first process frames */
1169 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1170 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1171
c1475ca9
JB		 1172 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1173 ra_tid = (void *)&skb->cb;
1174 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1175 ra_tid->tid);
1176 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1177 ra_tid = (void *)&skb->cb;
1178 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1179 ra_tid->tid);
08cf42e8
MK		 1180 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1181 rx_agg = (void *)&skb->cb;
1182 mutex_lock(&local->sta_mtx);
1183 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1184 if (sta)
08cf42e8 1185 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1186 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1187 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1188 false, true);
08cf42e8
MK		 1189 mutex_unlock(&local->sta_mtx);
1190 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1191 rx_agg = (void *)&skb->cb;
1192 mutex_lock(&local->sta_mtx);
1193 sta = sta_info_get_bss(sdata, rx_agg->addr);
1194 if (sta)
1195 __ieee80211_stop_rx_ba_session(sta,
1196 rx_agg->tid,
1197 WLAN_BACK_RECIPIENT, 0,
1198 false);
1199 mutex_unlock(&local->sta_mtx);
8a4d32f3
AN		 1200 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_TDLS_CHSW) {
1201 ieee80211_process_tdls_channel_switch(sdata, skb);
c1475ca9
JB		 1202 } else if (ieee80211_is_action(mgmt->frame_control) &&
1203 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1204 int len = skb->len;
bed7ee6e 1205
a93e3644 1206 mutex_lock(&local->sta_mtx);
875ae5f6 1207 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1208 if (sta) {
1209 switch (mgmt->u.action.u.addba_req.action_code) {
1210 case WLAN_ACTION_ADDBA_REQ:
1211 ieee80211_process_addba_request(
1212 local, sta, mgmt, len);
1213 break;
1214 case WLAN_ACTION_ADDBA_RESP:
1215 ieee80211_process_addba_resp(local, sta,
1216 mgmt, len);
1217 break;
1218 case WLAN_ACTION_DELBA:
1219 ieee80211_process_delba(sdata, sta,
1220 mgmt, len);
1221 break;
1222 default:
1223 WARN_ON(1);
1224 break;
1225 }
1226 }
a93e3644 1227 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1228 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1229 struct ieee80211_hdr *hdr = (void *)mgmt;
1230 /*
1231 * So the frame isn't mgmt, but frame_control
1232 * is at the right place anyway, of course, so
1233 * the if statement is correct.
1234 *
1235 * Warn if we have other data frame types here,
1236 * they must not get here.
1237 */
1238 WARN_ON(hdr->frame_control &
1239 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1240 WARN_ON(!(hdr->seq_ctrl &
1241 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1242 /*
1243 * This was a fragment of a frame, received while
1244 * a block-ack session was active. That cannot be
1245 * right, so terminate the session.
1246 */
a93e3644 1247 mutex_lock(&local->sta_mtx);
875ae5f6 1248 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1249 if (sta) {
1250 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1251 IEEE80211_QOS_CTL_TID_MASK;
1252
1253 __ieee80211_stop_rx_ba_session(
1254 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1255 WLAN_REASON_QSTA_REQUIRE_SETUP,
1256 true);
344eec67 1257 }
a93e3644 1258 mutex_unlock(&local->sta_mtx);
bed7ee6e 1259 } else switch (sdata->vif.type) {
1fa57d01
JB		 1260 case NL80211_IFTYPE_STATION:
1261 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1262 break;
1263 case NL80211_IFTYPE_ADHOC:
1264 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1265 break;
1266 case NL80211_IFTYPE_MESH_POINT:
1267 if (!ieee80211_vif_is_mesh(&sdata->vif))
1268 break;
1269 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1270 break;
1271 default:
1272 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1273 break;
1274 }
36b3a628
JB		 1275
1276 kfree_skb(skb);
1fa57d01
JB		 1277 }
1278
1279 /* then other type-dependent work */
1280 switch (sdata->vif.type) {
1281 case NL80211_IFTYPE_STATION:
1282 ieee80211_sta_work(sdata);
1283 break;
1284 case NL80211_IFTYPE_ADHOC:
1285 ieee80211_ibss_work(sdata);
1286 break;
1287 case NL80211_IFTYPE_MESH_POINT:
1288 if (!ieee80211_vif_is_mesh(&sdata->vif))
1289 break;
1290 ieee80211_mesh_work(sdata);
1291 break;
239281f8
RL		 1292 case NL80211_IFTYPE_OCB:
1293 ieee80211_ocb_work(sdata);
1294 break;
1fa57d01
JB		 1295 default:
1296 break;
1297 }
1298}
1299
04ecd257
JB		 1300static void ieee80211_recalc_smps_work(struct work_struct *work)
1301{
1302 struct ieee80211_sub_if_data *sdata =
1303 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1304
1305 ieee80211_recalc_smps(sdata);
1306}
1fa57d01 1307
75636525
JB		 1308/*
1309 * Helper function to initialise an interface to a specific type.
1310 */
1311static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1312 enum nl80211_iftype type)
f0706e82 1313{
239281f8
RL		 1314 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1315 0xff, 0xff, 0xff};
1316
75636525
JB		 1317 /* clear type-dependent union */
1318 memset(&sdata->u, 0, sizeof(sdata->u));
1319
1320 /* and set some type-dependent values */
1321 sdata->vif.type = type;
2ca27bcf 1322 sdata->vif.p2p = false;
60719ffd 1323 sdata->wdev.iftype = type;
75636525 1324
a621fa4d
JB		 1325 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1326 sdata->control_port_no_encrypt = false;
2475b1cc 1327 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1328 sdata->vif.bss_conf.idle = true;
a621fa4d 1329
b53be792
SW		 1330 sdata->noack_map = 0;
1331
f142c6b9
JB		 1332 /* only monitor/p2p-device differ */
1333 if (sdata->dev) {
1334 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1335 sdata->dev->type = ARPHRD_ETHER;
1336 }
75636525 1337
35f20c14 1338 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1339 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1340 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1341 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1342 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1343 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1344
75636525 1345 switch (type) {
2ca27bcf
JB		 1346 case NL80211_IFTYPE_P2P_GO:
1347 type = NL80211_IFTYPE_AP;
1348 sdata->vif.type = type;
1349 sdata->vif.p2p = true;
1350 /* fall through */
05c914fe 1351 case NL80211_IFTYPE_AP:
d012a605 1352 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1353 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1354 INIT_WORK(&sdata->u.ap.request_smps_work,
1355 ieee80211_request_smps_ap_work);
ad2d223a 1356 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1357 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1358 break;
2ca27bcf
JB		 1359 case NL80211_IFTYPE_P2P_CLIENT:
1360 type = NL80211_IFTYPE_STATION;
1361 sdata->vif.type = type;
1362 sdata->vif.p2p = true;
1363 /* fall through */
05c914fe 1364 case NL80211_IFTYPE_STATION:
ad2d223a 1365 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1366 ieee80211_sta_setup_sdata(sdata);
472dbc45 1367 break;
6e0bd6c3 1368 case NL80211_IFTYPE_OCB:
239281f8
RL		 1369 sdata->vif.bss_conf.bssid = bssid_wildcard;
1370 ieee80211_ocb_setup_sdata(sdata);
6e0bd6c3 1371 break;
46900298 1372 case NL80211_IFTYPE_ADHOC:
ad2d223a 1373 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1374 ieee80211_ibss_setup_sdata(sdata);
1375 break;
05c914fe 1376 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1377 if (ieee80211_vif_is_mesh(&sdata->vif))
1378 ieee80211_mesh_init_sdata(sdata);
1379 break;
05c914fe 1380 case NL80211_IFTYPE_MONITOR:
75636525 1381 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1382 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1383 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1384 MONITOR_FLAG_OTHER_BSS;
1385 break;
05c914fe 1386 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1387 sdata->vif.bss_conf.bssid = NULL;
1388 break;
05c914fe 1389 case NL80211_IFTYPE_AP_VLAN:
98104fde 1390 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1391 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1392 break;
05c914fe 1393 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1394 case NUM_NL80211_IFTYPES:
75636525
JB		 1395 BUG();
1396 break;
1397 }
1398
1399 ieee80211_debugfs_add_netdev(sdata);
1400}
1401
34d4bc4d
JB		 1402static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1403 enum nl80211_iftype type)
1404{
1405 struct ieee80211_local *local = sdata->local;
1406 int ret, err;
2ca27bcf
JB		 1407 enum nl80211_iftype internal_type = type;
1408 bool p2p = false;
34d4bc4d
JB		 1409
1410 ASSERT_RTNL();
1411
1412 if (!local->ops->change_interface)
1413 return -EBUSY;
1414
1415 switch (sdata->vif.type) {
1416 case NL80211_IFTYPE_AP:
1417 case NL80211_IFTYPE_STATION:
1418 case NL80211_IFTYPE_ADHOC:
239281f8 1419 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1420 /*
1421 * Could maybe also all others here?
1422 * Just not sure how that interacts
1423 * with the RX/config path e.g. for
1424 * mesh.
1425 */
1426 break;
1427 default:
1428 return -EBUSY;
1429 }
1430
1431 switch (type) {
1432 case NL80211_IFTYPE_AP:
1433 case NL80211_IFTYPE_STATION:
1434 case NL80211_IFTYPE_ADHOC:
239281f8 1435 case NL80211_IFTYPE_OCB:
34d4bc4d
JB		 1436 /*
1437 * Could probably support everything
1438 * but WDS here (WDS do_open can fail
1439 * under memory pressure, which this
1440 * code isn't prepared to handle).
1441 */
1442 break;
2ca27bcf
JB		 1443 case NL80211_IFTYPE_P2P_CLIENT:
1444 p2p = true;
1445 internal_type = NL80211_IFTYPE_STATION;
1446 break;
1447 case NL80211_IFTYPE_P2P_GO:
1448 p2p = true;
1449 internal_type = NL80211_IFTYPE_AP;
1450 break;
34d4bc4d
JB		 1451 default:
1452 return -EBUSY;
1453 }
1454
2ca27bcf 1455 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1456 if (ret)
1457 return ret;
1458
1459 ieee80211_do_stop(sdata, false);
1460
f142c6b9 1461 ieee80211_teardown_sdata(sdata);
34d4bc4d 1462
2ca27bcf 1463 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1464 if (ret)
a9865538 1465 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1466
3a25a8c8
JB		 1467 /*
1468 * Ignore return value here, there's not much we can do since
1469 * the driver changed the interface type internally already.
1470 * The warnings will hopefully make driver authors fix it :-)
1471 */
a9865538 1472 ieee80211_check_queues(sdata, type);
3a25a8c8 1473
34d4bc4d
JB		 1474 ieee80211_setup_sdata(sdata, type);
1475
f142c6b9 1476 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1477 WARN(err, "type change: do_open returned %d", err);
1478
1479 return ret;
1480}
1481
f3947e2d 1482int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1483 enum nl80211_iftype type)
75636525 1484{
34d4bc4d
JB		 1485 int ret;
1486
f3947e2d
JB		 1487 ASSERT_RTNL();
1488
2ca27bcf 1489 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1490 return 0;
1491
34d4bc4d
JB		 1492 if (ieee80211_sdata_running(sdata)) {
1493 ret = ieee80211_runtime_change_iftype(sdata, type);
1494 if (ret)
1495 return ret;
1496 } else {
1497 /* Purge and reset type-dependent state. */
f142c6b9 1498 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1499 ieee80211_setup_sdata(sdata, type);
1500 }
75636525
JB		 1501
1502 /* reset some values that shouldn't be kept across type changes */
9bc383de
JB		 1503 if (type == NL80211_IFTYPE_STATION)
1504 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1505
1506 return 0;
f0706e82
JB		 1507}
1508
fa9029f8 1509static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1510 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1511{
1512 struct ieee80211_sub_if_data *sdata;
1513 u64 mask, start, addr, val, inc;
1514 u8 *m;
1515 u8 tmp_addr[ETH_ALEN];
1516 int i;
1517
1518 /* default ... something at least */
f142c6b9 1519 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1520
1521 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1522 local->hw.wiphy->n_addresses <= 1)
1523 return;
1524
fa9029f8
JB		 1525 mutex_lock(&local->iflist_mtx);
1526
1527 switch (type) {
1528 case NL80211_IFTYPE_MONITOR:
1529 /* doesn't matter */
1530 break;
1531 case NL80211_IFTYPE_WDS:
1532 case NL80211_IFTYPE_AP_VLAN:
1533 /* match up with an AP interface */
1534 list_for_each_entry(sdata, &local->interfaces, list) {
1535 if (sdata->vif.type != NL80211_IFTYPE_AP)
1536 continue;
f142c6b9 1537 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1538 break;
1539 }
1540 /* keep default if no AP interface present */
1541 break;
6d71117a
JB		 1542 case NL80211_IFTYPE_P2P_CLIENT:
1543 case NL80211_IFTYPE_P2P_GO:
1544 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1545 list_for_each_entry(sdata, &local->interfaces, list) {
1546 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1547 continue;
1548 if (!ieee80211_sdata_running(sdata))
1549 continue;
1550 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1551 goto out_unlock;
1552 }
1553 }
1554 /* otherwise fall through */
fa9029f8
JB		 1555 default:
1556 /* assign a new address if possible -- try n_addresses first */
1557 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1558 bool used = false;
1559
1560 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1561 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1562 sdata->vif.addr)) {
fa9029f8
JB		 1563 used = true;
1564 break;
1565 }
1566 }
1567
1568 if (!used) {
f142c6b9 1569 memcpy(perm_addr,
fa9029f8
JB		 1570 local->hw.wiphy->addresses[i].addr,
1571 ETH_ALEN);
1572 break;
1573 }
1574 }
1575
1576 /* try mask if available */
1577 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1578 break;
1579
1580 m = local->hw.wiphy->addr_mask;
1581 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1582 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1583 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1584
1585 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1586 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1587 pr_info("not contiguous\n");
fa9029f8
JB		 1588 break;
1589 }
1590
ac20976d
HS		 1591 /*
1592 * Pick address of existing interface in case user changed
1593 * MAC address manually, default to perm_addr.
1594 */
fa9029f8 1595 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1596 list_for_each_entry(sdata, &local->interfaces, list) {
1597 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1598 continue;
1599 m = sdata->vif.addr;
1600 break;
1601 }
fa9029f8
JB		 1602 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1603 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1604 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1605
1606 inc = 1ULL<<__ffs64(mask);
1607 val = (start & mask);
1608 addr = (start & ~mask) | (val & mask);
1609 do {
1610 bool used = false;
1611
1612 tmp_addr[5] = addr >> 0*8;
1613 tmp_addr[4] = addr >> 1*8;
1614 tmp_addr[3] = addr >> 2*8;
1615 tmp_addr[2] = addr >> 3*8;
1616 tmp_addr[1] = addr >> 4*8;
1617 tmp_addr[0] = addr >> 5*8;
1618
1619 val += inc;
1620
1621 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1622 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1623 used = true;
1624 break;
1625 }
1626 }
1627
1628 if (!used) {
f142c6b9 1629 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1630 break;
1631 }
1632 addr = (start & ~mask) | (val & mask);
1633 } while (addr != start);
1634
1635 break;
1636 }
1637
6d71117a 1638 out_unlock:
fa9029f8
JB		 1639 mutex_unlock(&local->iflist_mtx);
1640}
1641
3e122be0 1642int ieee80211_if_add(struct ieee80211_local *local, const char *name,
6bab2e19 1643 unsigned char name_assign_type,
84efbb84 1644 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1645 struct vif_params *params)
f0706e82 1646{
f142c6b9 1647 struct net_device *ndev = NULL;
f0706e82 1648 struct ieee80211_sub_if_data *sdata = NULL;
ba8c3d6f 1649 struct txq_info *txqi;
75636525 1650 int ret, i;
ded81f6b 1651 int txqs = 1;
f0706e82
JB		 1652
1653 ASSERT_RTNL();
75636525 1654
f142c6b9
JB		 1655 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1656 struct wireless_dev *wdev;
1657
1658 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1659 GFP_KERNEL);
1660 if (!sdata)
1661 return -ENOMEM;
1662 wdev = &sdata->wdev;
1663
1664 sdata->dev = NULL;
1665 strlcpy(sdata->name, name, IFNAMSIZ);
1666 ieee80211_assign_perm_addr(local, wdev->address, type);
1667 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1668 } else {
ba8c3d6f
FF		 1669 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1670 sizeof(void *));
1671 int txq_size = 0;
1672
1673 if (local->ops->wake_tx_queue)
1674 txq_size += sizeof(struct txq_info) +
1675 local->hw.txq_data_size;
1676
f142c6b9
JB		 1677 if (local->hw.queues >= IEEE80211_NUM_ACS)
1678 txqs = IEEE80211_NUM_ACS;
1679
ba8c3d6f 1680 ndev = alloc_netdev_mqs(size + txq_size,
6bab2e19 1681 name, name_assign_type,
c835a677 1682 ieee80211_if_setup, txqs, 1);
f142c6b9
JB		 1683 if (!ndev)
1684 return -ENOMEM;
1685 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1686
1687 ndev->needed_headroom = local->tx_headroom +
1688 4*6 /* four MAC addresses */
1689 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1690 + 6 /* mesh */
1691 + 8 /* rfc1042/bridge tunnel */
1692 - ETH_HLEN /* ethernet hard_header_len */
1693 + IEEE80211_ENCRYPT_HEADROOM;
1694 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1695
1696 ret = dev_alloc_name(ndev, ndev->name);
1697 if (ret < 0) {
1698 free_netdev(ndev);
1699 return ret;
1700 }
1701
1702 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
b5dfae02
BG		 1703 if (params && is_valid_ether_addr(params->macaddr))
1704 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1705 else
1706 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f142c6b9
JB		 1707 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1708
1709 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1710 sdata = netdev_priv(ndev);
1711 ndev->ieee80211_ptr = &sdata->wdev;
1712 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1713 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1714
ba8c3d6f
FF		 1715 if (txq_size) {
1716 txqi = netdev_priv(ndev) + size;
1717 ieee80211_init_tx_queue(sdata, NULL, txqi, 0);
1718 }
1719
f142c6b9
JB		 1720 sdata->dev = ndev;
1721 }
75636525
JB		 1722
1723 /* initialise type-independent data */
f0706e82 1724 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1725 sdata->local = local;
75636525
JB		 1726
1727 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1728 skb_queue_head_init(&sdata->fragments[i].skb_list);
1729
1730 INIT_LIST_HEAD(&sdata->key_list);
1731
164eb02d
SW		 1732 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1733 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1734 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1735 ieee80211_delayed_tailroom_dec);
97f97b1f 1736
37eb0b16
JM		 1737 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1738 struct ieee80211_supported_band *sband;
1739 sband = local->hw.wiphy->bands[i];
1740 sdata->rc_rateidx_mask[i] =
1741 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1742 if (sband)
1743 memcpy(sdata->rc_rateidx_mcs_mask[i],
1744 sband->ht_cap.mcs.rx_mask,
1745 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1746 else
1747 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1748 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1749 }
75636525 1750
3a25a8c8
JB		 1751 ieee80211_set_default_queues(sdata);
1752
1ea6f9c0
JB		 1753 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1754 sdata->user_power_level = local->user_power_level;
1755
2475b1cc
MS		 1756 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1757
75636525
JB		 1758 /* setup type-dependent data */
1759 ieee80211_setup_sdata(sdata, type);
f0706e82 1760
f142c6b9
JB		 1761 if (ndev) {
1762 if (params) {
1763 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1764 if (type == NL80211_IFTYPE_STATION)
1765 sdata->u.mgd.use_4addr = params->use_4addr;
1766 }
9bc383de 1767
f142c6b9 1768 ndev->features |= local->hw.netdev_features;
72d78728 1769
b7ffbd7e
JB		 1770 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1771
f142c6b9
JB		 1772 ret = register_netdevice(ndev);
1773 if (ret) {
1774 free_netdev(ndev);
1775 return ret;
1776 }
1777 }
f0706e82 1778
c771c9d8 1779 mutex_lock(&local->iflist_mtx);
79010420 1780 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1781 mutex_unlock(&local->iflist_mtx);
79010420 1782
84efbb84
JB		 1783 if (new_wdev)
1784 *new_wdev = &sdata->wdev;
f0706e82 1785
f0706e82 1786 return 0;
f0706e82
JB		 1787}
1788
f698d856 1789void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1790{
f0706e82 1791 ASSERT_RTNL();
11a843b7 1792
c771c9d8 1793 mutex_lock(&sdata->local->iflist_mtx);
75636525 1794 list_del_rcu(&sdata->list);
c771c9d8
JB		 1795 mutex_unlock(&sdata->local->iflist_mtx);
1796
75636525 1797 synchronize_rcu();
f142c6b9
JB		 1798
1799 if (sdata->dev) {
1800 unregister_netdevice(sdata->dev);
1801 } else {
1802 cfg80211_unregister_wdev(&sdata->wdev);
1803 kfree(sdata);
1804 }
1805}
1806
1807void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1808{
1809 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1810 return;
1811 ieee80211_do_stop(sdata, true);
1812 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1813}
1814
75636525
JB		 1815/*
1816 * Remove all interfaces, may only be called at hardware unregistration
1817 * time because it doesn't do RCU-safe list removals.
1818 */
1819void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1820{
75636525 1821 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1822 LIST_HEAD(unreg_list);
f142c6b9 1823 LIST_HEAD(wdev_list);
f0706e82
JB		 1824
1825 ASSERT_RTNL();
1826
c8aa22db
JB		 1827 /*
1828 * Close all AP_VLAN interfaces first, as otherwise they
1829 * might be closed while the AP interface they belong to
1830 * is closed, causing unregister_netdevice_many() to crash.
1831 */
1832 list_for_each_entry(sdata, &local->interfaces, list)
1833 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1834 dev_close(sdata->dev);
1835
efe117ab 1836 mutex_lock(&local->iflist_mtx);
75636525
JB		 1837 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1838 list_del(&sdata->list);
c771c9d8 1839
f142c6b9
JB		 1840 if (sdata->dev)
1841 unregister_netdevice_queue(sdata->dev, &unreg_list);
1842 else
1843 list_add(&sdata->list, &wdev_list);
f0706e82 1844 }
efe117ab
ED		 1845 mutex_unlock(&local->iflist_mtx);
1846 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1847
1848 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1849 list_del(&sdata->list);
1850 cfg80211_unregister_wdev(&sdata->wdev);
1851 kfree(sdata);
1852 }
f0706e82 1853}
5cff20e6 1854
47846c9b 1855static int netdev_notify(struct notifier_block *nb,
351638e7 1856 unsigned long state, void *ptr)
47846c9b 1857{
351638e7 1858 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1859 struct ieee80211_sub_if_data *sdata;
1860
1861 if (state != NETDEV_CHANGENAME)
8bd811aa 1862 return NOTIFY_DONE;
47846c9b
JB		 1863
1864 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1865 return NOTIFY_DONE;
47846c9b
JB		 1866
1867 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1868 return NOTIFY_DONE;
47846c9b
JB		 1869
1870 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1871 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1872 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1873
1874 return NOTIFY_OK;
47846c9b
JB		 1875}
1876
1877static struct notifier_block mac80211_netdev_notifier = {
1878 .notifier_call = netdev_notify,
1879};
1880
1881int ieee80211_iface_init(void)
1882{
1883 return register_netdevice_notifier(&mac80211_netdev_notifier);
1884}
1885
1886void ieee80211_iface_exit(void)
1887{
1888 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1889}
Linux 6.x block layer and io_uring tree(s)