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mac80211: remove weak WEP IV accounting
[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>
f0706e82
JB		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
18#include <net/mac80211.h>
cf0277e7 19#include <net/ieee80211_radiotap.h>
f0706e82
JB		 20#include "ieee80211_i.h"
21#include "sta_info.h"
e9f207f0 22#include "debugfs_netdev.h"
ee385855 23#include "mesh.h"
0d143fe1 24#include "led.h"
24487981 25#include "driver-ops.h"
cf0277e7 26#include "wme.h"
1be7fe8d 27#include "rate.h"
0d143fe1 28
c771c9d8
JB		 29/**
30 * DOC: Interface list locking
31 *
32 * The interface list in each struct ieee80211_local is protected
33 * three-fold:
34 *
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
37 * the iflist_mtx.
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
40 *
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
43 */
44
1ea6f9c0
JB		 45bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
46{
47 struct ieee80211_chanctx_conf *chanctx_conf;
48 int power;
49
50 rcu_read_lock();
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
52 if (!chanctx_conf) {
53 rcu_read_unlock();
54 return false;
55 }
56
0430c883 57 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 58 rcu_read_unlock();
59
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
62
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
65
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
69 return true;
70 }
71
72 return false;
73}
74
75void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
76{
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
79}
c771c9d8 80
62a40a15 81static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 82{
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
84 return 0;
85
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
88}
89
62a40a15 90static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 91{
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
93 return 0;
94
39ecc01d 95 ieee80211_flush_queues(local, NULL);
cc45ae54
JB		 96
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
99}
100
62a40a15
JB		 101static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
102 bool force_active)
cc45ae54 103{
1d5e1266 104 bool working, scanning, active;
cc45ae54 105 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 106
cc45ae54
JB		 107 lockdep_assert_held(&local->mtx);
108
62a40a15
JB		 109 active = force_active ||
110 !list_empty(&local->chanctx_list) ||
111 local->monitors;
cc45ae54 112
1d5e1266
JB		 113 working = !local->ops->remain_on_channel &&
114 !list_empty(&local->roc_list);
cc45ae54 115
f1e3e051
JB		 116 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
117 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 118
cc45ae54
JB		 119 if (working || scanning)
120 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
121 else
122 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
123
fd0f979a 124 if (active)
cc45ae54
JB		 125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
128
129 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
130
fd0f979a 131 if (working || scanning || active)
62a40a15
JB		 132 return __ieee80211_idle_off(local);
133 return __ieee80211_idle_on(local);
134}
135
136u32 ieee80211_idle_off(struct ieee80211_local *local)
137{
138 return __ieee80211_recalc_idle(local, true);
139}
140
141void ieee80211_recalc_idle(struct ieee80211_local *local)
142{
143 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 144 if (change)
145 ieee80211_hw_config(local, change);
cc45ae54
JB		 146}
147
0d143fe1
JB		 148static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
149{
09b1426e 150 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 151 return -EINVAL;
0d143fe1 152
0d143fe1
JB		 153 dev->mtu = new_mtu;
154 return 0;
155}
156
3899ba90 157static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 158 bool check_dup)
478622e8 159{
ac20976d
HS		 160 struct ieee80211_local *local = sdata->local;
161 struct ieee80211_sub_if_data *iter;
478622e8
HS		 162 u64 new, mask, tmp;
163 u8 *m;
164 int ret = 0;
165
166 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
167 return 0;
168
169 m = addr;
170 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
173
174 m = local->hw.wiphy->addr_mask;
175 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178
31eba5bc
FF		 179 if (!check_dup)
180 return ret;
478622e8
HS		 181
182 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 183 list_for_each_entry(iter, &local->interfaces, list) {
184 if (iter == sdata)
478622e8
HS		 185 continue;
186
3899ba90
JL		 187 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
188 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 189 continue;
190
ac20976d 191 m = iter->vif.addr;
478622e8
HS		 192 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
193 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
194 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
195
196 if ((new & ~mask) != (tmp & ~mask)) {
197 ret = -EINVAL;
198 break;
199 }
200 }
201 mutex_unlock(&local->iflist_mtx);
202
203 return ret;
204}
205
47846c9b
JB		 206static int ieee80211_change_mac(struct net_device *dev, void *addr)
207{
208 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 209 struct sockaddr *sa = addr;
31eba5bc 210 bool check_dup = true;
47846c9b
JB		 211 int ret;
212
9607e6b6 213 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 214 return -EBUSY;
215
31eba5bc
FF		 216 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
217 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
218 check_dup = false;
219
3899ba90 220 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 221 if (ret)
222 return ret;
223
fc5f7577 224 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 225
226 if (ret == 0)
fc5f7577 227 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 228
229 return ret;
230}
231
0d143fe1
JB		 232static inline int identical_mac_addr_allowed(int type1, int type2)
233{
234 return type1 == NL80211_IFTYPE_MONITOR ||
235 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 236 type1 == NL80211_IFTYPE_P2P_DEVICE ||
237 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
239 (type1 == NL80211_IFTYPE_WDS &&
240 (type2 == NL80211_IFTYPE_WDS ||
241 type2 == NL80211_IFTYPE_AP)) ||
242 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
243 (type1 == NL80211_IFTYPE_AP_VLAN &&
244 (type2 == NL80211_IFTYPE_AP ||
245 type2 == NL80211_IFTYPE_AP_VLAN));
246}
247
87490f6d
JB		 248static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
249 enum nl80211_iftype iftype)
0d143fe1 250{
b4a4bf5d 251 struct ieee80211_local *local = sdata->local;
87490f6d 252 struct ieee80211_sub_if_data *nsdata;
b6a55015 253 int ret;
0d143fe1 254
87490f6d 255 ASSERT_RTNL();
0d143fe1
JB		 256
257 /* we hold the RTNL here so can safely walk the list */
258 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 259 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 260 /*
261 * Allow only a single IBSS interface to be up at any
262 * time. This is restricted because beacon distribution
263 * cannot work properly if both are in the same IBSS.
264 *
265 * To remove this restriction we'd have to disallow them
266 * from setting the same SSID on different IBSS interfaces
267 * belonging to the same hardware. Then, however, we're
268 * faced with having to adopt two different TSF timers...
269 */
87490f6d 270 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 271 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
272 return -EBUSY;
73da7d5b
SW		 273 /*
274 * will not add another interface while any channel
275 * switch is active.
276 */
277 if (nsdata->vif.csa_active)
278 return -EBUSY;
0d143fe1
JB		 279
280 /*
281 * The remaining checks are only performed for interfaces
282 * with the same MAC address.
283 */
371a255e
JB		 284 if (!ether_addr_equal(sdata->vif.addr,
285 nsdata->vif.addr))
0d143fe1
JB		 286 continue;
287
288 /*
289 * check whether it may have the same address
290 */
87490f6d 291 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 292 nsdata->vif.type))
293 return -ENOTUNIQ;
294
295 /*
296 * can only add VLANs to enabled APs
297 */
87490f6d 298 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 299 nsdata->vif.type == NL80211_IFTYPE_AP)
300 sdata->bss = &nsdata->u.ap;
301 }
302 }
303
b6a55015
LC		 304 mutex_lock(&local->chanctx_mtx);
305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
306 mutex_unlock(&local->chanctx_mtx);
307 return ret;
87490f6d
JB		 308}
309
a9865538
JB		 310static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
311 enum nl80211_iftype iftype)
3a25a8c8
JB		 312{
313 int n_queues = sdata->local->hw.queues;
314 int i;
315
a9865538 316 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 317 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
318 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
319 IEEE80211_INVAL_HW_QUEUE))
320 return -EINVAL;
321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
322 n_queues))
323 return -EINVAL;
324 }
3a25a8c8
JB		 325 }
326
a9865538
JB		 327 if ((iftype != NL80211_IFTYPE_AP &&
328 iftype != NL80211_IFTYPE_P2P_GO &&
329 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 330 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 331 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
332 return 0;
333 }
334
335 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
336 return -EINVAL;
337
338 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
339 return -EINVAL;
340
341 return 0;
342}
343
85416a4f
CL		 344void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
345 const int offset)
346{
347 struct ieee80211_local *local = sdata->local;
348 u32 flags = sdata->u.mntr_flags;
349
350#define ADJUST(_f, _s) do { \
351 if (flags & MONITOR_FLAG_##_f) \
352 local->fif_##_s += offset; \
353 } while (0)
354
355 ADJUST(FCSFAIL, fcsfail);
356 ADJUST(PLCPFAIL, plcpfail);
357 ADJUST(CONTROL, control);
358 ADJUST(CONTROL, pspoll);
359 ADJUST(OTHER_BSS, other_bss);
360
361#undef ADJUST
362}
363
3a25a8c8
JB		 364static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
365{
366 struct ieee80211_local *local = sdata->local;
367 int i;
368
369 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
370 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
371 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 372 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 373 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 374 else
375 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 376 }
377 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
378}
379
3c3e21e7 380int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 381{
382 struct ieee80211_sub_if_data *sdata;
8b305780 383 int ret;
4b6f1dd6
JB		 384
385 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
386 return 0;
387
8b305780 388 ASSERT_RTNL();
685fb72b 389
4b6f1dd6 390 if (local->monitor_sdata)
8b305780 391 return 0;
4b6f1dd6
JB		 392
393 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 394 if (!sdata)
395 return -ENOMEM;
4b6f1dd6
JB		 396
397 /* set up data */
398 sdata->local = local;
399 sdata->vif.type = NL80211_IFTYPE_MONITOR;
400 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
401 wiphy_name(local->hw.wiphy));
34171dc0 402 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 403
2475b1cc
MS		 404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
405
3a25a8c8
JB		 406 ieee80211_set_default_queues(sdata);
407
4b6f1dd6
JB		 408 ret = drv_add_interface(local, sdata);
409 if (WARN_ON(ret)) {
410 /* ok .. stupid driver, it asked for this! */
411 kfree(sdata);
8b305780 412 return ret;
4b6f1dd6
JB		 413 }
414
a9865538 415 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 416 if (ret) {
417 kfree(sdata);
8b305780 418 return ret;
3a25a8c8
JB		 419 }
420
fab57a6c
JB		 421 mutex_lock(&local->iflist_mtx);
422 rcu_assign_pointer(local->monitor_sdata, sdata);
423 mutex_unlock(&local->iflist_mtx);
424
34a3740d 425 mutex_lock(&local->mtx);
4bf88530 426 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 427 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 428 mutex_unlock(&local->mtx);
55de908a 429 if (ret) {
fab57a6c 430 mutex_lock(&local->iflist_mtx);
0c2bef46 431 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 432 mutex_unlock(&local->iflist_mtx);
433 synchronize_net();
55de908a
JB		 434 drv_remove_interface(local, sdata);
435 kfree(sdata);
8b305780 436 return ret;
55de908a
JB		 437 }
438
8b305780 439 return 0;
4b6f1dd6
JB		 440}
441
3c3e21e7 442void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 443{
444 struct ieee80211_sub_if_data *sdata;
445
446 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
447 return;
448
8b305780
JB		 449 ASSERT_RTNL();
450
685fb72b 451 mutex_lock(&local->iflist_mtx);
4b6f1dd6 452
685fb72b
JB		 453 sdata = rcu_dereference_protected(local->monitor_sdata,
454 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 455 if (!sdata) {
456 mutex_unlock(&local->iflist_mtx);
457 return;
458 }
4b6f1dd6 459
0c2bef46 460 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 461 mutex_unlock(&local->iflist_mtx);
462
4b6f1dd6
JB		 463 synchronize_net();
464
34a3740d 465 mutex_lock(&local->mtx);
55de908a 466 ieee80211_vif_release_channel(sdata);
34a3740d 467 mutex_unlock(&local->mtx);
55de908a 468
4b6f1dd6
JB		 469 drv_remove_interface(local, sdata);
470
471 kfree(sdata);
472}
473
34d4bc4d
JB		 474/*
475 * NOTE: Be very careful when changing this function, it must NOT return
476 * an error on interface type changes that have been pre-checked, so most
477 * checks should be in ieee80211_check_concurrent_iface.
478 */
f142c6b9 479int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 480{
f142c6b9
JB		 481 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
482 struct net_device *dev = wdev->netdev;
87490f6d
JB		 483 struct ieee80211_local *local = sdata->local;
484 struct sta_info *sta;
485 u32 changed = 0;
486 int res;
487 u32 hw_reconf_flags = 0;
488
0d143fe1
JB		 489 switch (sdata->vif.type) {
490 case NL80211_IFTYPE_WDS:
491 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
492 return -ENOLINK;
493 break;
665c93a9
JB		 494 case NL80211_IFTYPE_AP_VLAN: {
495 struct ieee80211_sub_if_data *master;
496
0d143fe1
JB		 497 if (!sdata->bss)
498 return -ENOLINK;
665c93a9 499
4e141dad 500 mutex_lock(&local->mtx);
0d143fe1 501 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 502 mutex_unlock(&local->mtx);
665c93a9
JB		 503
504 master = container_of(sdata->bss,
505 struct ieee80211_sub_if_data, u.ap);
506 sdata->control_port_protocol =
507 master->control_port_protocol;
508 sdata->control_port_no_encrypt =
509 master->control_port_no_encrypt;
1351c5d3
JB		 510 sdata->vif.cab_queue = master->vif.cab_queue;
511 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
512 sizeof(sdata->vif.hw_queue));
0d143fe1 513 break;
665c93a9 514 }
0d143fe1
JB		 515 case NL80211_IFTYPE_AP:
516 sdata->bss = &sdata->u.ap;
517 break;
518 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 519 case NL80211_IFTYPE_STATION:
520 case NL80211_IFTYPE_MONITOR:
521 case NL80211_IFTYPE_ADHOC:
f142c6b9 522 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 523 /* no special treatment */
524 break;
525 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 526 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 527 case NL80211_IFTYPE_P2P_CLIENT:
528 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 529 /* cannot happen */
530 WARN_ON(1);
531 break;
532 }
533
534 if (local->open_count == 0) {
24487981 535 res = drv_start(local);
0d143fe1
JB		 536 if (res)
537 goto err_del_bss;
e8975581
JB		 538 /* we're brought up, everything changes */
539 hw_reconf_flags = ~0;
1f87f7d3 540 ieee80211_led_radio(local, true);
67408c8c
JB		 541 ieee80211_mod_tpt_led_trig(local,
542 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 543 }
544
545 /*
bf533e0b
JB		 546 * Copy the hopefully now-present MAC address to
547 * this interface, if it has the special null one.
0d143fe1 548 */
f142c6b9 549 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 550 memcpy(dev->dev_addr,
551 local->hw.wiphy->perm_addr,
552 ETH_ALEN);
553 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
554
555 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 556 res = -EADDRNOTAVAIL;
557 goto err_stop;
0adc23f5 558 }
0d143fe1
JB		 559 }
560
0d143fe1
JB		 561 switch (sdata->vif.type) {
562 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 563 /* no need to tell driver, but set carrier and chanctx */
564 if (rtnl_dereference(sdata->bss->beacon)) {
565 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 566 netif_carrier_on(dev);
4d76d21b 567 } else {
3edaf3e6 568 netif_carrier_off(dev);
4d76d21b 569 }
0d143fe1
JB		 570 break;
571 case NL80211_IFTYPE_MONITOR:
572 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
573 local->cooked_mntrs++;
574 break;
575 }
576
31eba5bc
FF		 577 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
578 res = drv_add_interface(local, sdata);
579 if (res)
580 goto err_stop;
581 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 582 res = ieee80211_add_virtual_monitor(local);
583 if (res)
584 goto err_stop;
585 }
586
0d143fe1
JB		 587 /* must be before the call to ieee80211_configure_filter */
588 local->monitors++;
e8975581 589 if (local->monitors == 1) {
0869aea0
JB		 590 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
591 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 592 }
0d143fe1 593
85416a4f 594 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 595 ieee80211_configure_filter(local);
801d929c
FF		 596 mutex_lock(&local->mtx);
597 ieee80211_recalc_idle(local);
598 mutex_unlock(&local->mtx);
53e9b1de
DG		 599
600 netif_carrier_on(dev);
0d143fe1 601 break;
0d143fe1 602 default:
34d4bc4d 603 if (coming_up) {
075e0847
JB		 604 ieee80211_del_virtual_monitor(local);
605
7b7eab6f 606 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 607 if (res)
608 goto err_stop;
a9865538
JB		 609 res = ieee80211_check_queues(sdata,
610 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 611 if (res)
612 goto err_del_interface;
34d4bc4d 613 }
0d143fe1 614
29cbe68c 615 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 616 local->fif_pspoll++;
7be5086d 617 local->fif_probe_req++;
e3b90ca2 618
e3b90ca2 619 ieee80211_configure_filter(local);
7be5086d
JB		 620 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
621 local->fif_probe_req++;
a3c9aa51 622 }
e3b90ca2 623
f142c6b9
JB		 624 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
625 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 626 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 627
c405c629
JB		 628 switch (sdata->vif.type) {
629 case NL80211_IFTYPE_STATION:
630 case NL80211_IFTYPE_ADHOC:
631 case NL80211_IFTYPE_AP:
632 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 633 netif_carrier_off(dev);
c405c629 634 break;
1411af15 635 case NL80211_IFTYPE_WDS:
f142c6b9 636 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 637 break;
c405c629 638 default:
a2310824
JB		 639 /* not reached */
640 WARN_ON(1);
c405c629 641 }
59034591
EP		 642
643 /*
644 * set default queue parameters so drivers don't
645 * need to initialise the hardware if the hardware
646 * doesn't start up with sane defaults
647 */
3abead59 648 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 649 }
650
2d2080c3
JB		 651 set_bit(SDATA_STATE_RUNNING, &sdata->state);
652
0d143fe1
JB		 653 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
654 /* Create STA entry for the WDS peer */
655 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
656 GFP_KERNEL);
657 if (!sta) {
658 res = -ENOMEM;
659 goto err_del_interface;
660 }
661
83d5cc01
JB		 662 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
663 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
664 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 665
666 res = sta_info_insert(sta);
667 if (res) {
668 /* STA has been freed */
669 goto err_del_interface;
670 }
1be7fe8d
BJ		 671
672 rate_control_rate_init(sta);
1411af15 673 netif_carrier_on(dev);
f142c6b9
JB		 674 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
675 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 676 }
677
0d143fe1
JB		 678 /*
679 * set_multicast_list will be invoked by the networking core
680 * which will check whether any increments here were done in
681 * error and sync them down to the hardware as filter flags.
682 */
683 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
684 atomic_inc(&local->iff_allmultis);
685
686 if (sdata->flags & IEEE80211_SDATA_PROMISC)
687 atomic_inc(&local->iff_promiscs);
688
34d4bc4d
JB		 689 if (coming_up)
690 local->open_count++;
691
59034591 692 if (hw_reconf_flags)
e8975581 693 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 694
10f644a4 695 ieee80211_recalc_ps(local, -1);
965bedad 696
2b436312
JB		 697 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
698 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
699 /* XXX: for AP_VLAN, actually track AP queues */
700 netif_tx_start_all_queues(dev);
701 } else if (dev) {
2b730daa
JB		 702 unsigned long flags;
703 int n_acs = IEEE80211_NUM_ACS;
704 int ac;
705
706 if (local->hw.queues < IEEE80211_NUM_ACS)
707 n_acs = 1;
708
709 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
710 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
711 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
712 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
713 for (ac = 0; ac < n_acs; ac++) {
714 int ac_queue = sdata->vif.hw_queue[ac];
715
716 if (local->queue_stop_reasons[ac_queue] == 0 &&
717 skb_queue_empty(&local->pending[ac_queue]))
718 netif_start_subqueue(dev, ac);
719 }
720 }
721 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
722 }
0d143fe1
JB		 723
724 return 0;
725 err_del_interface:
7b7eab6f 726 drv_remove_interface(local, sdata);
0d143fe1 727 err_stop:
24487981
JB		 728 if (!local->open_count)
729 drv_stop(local);
0d143fe1
JB		 730 err_del_bss:
731 sdata->bss = NULL;
4e141dad
MK		 732 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
733 mutex_lock(&local->mtx);
0d143fe1 734 list_del(&sdata->u.vlan.list);
4e141dad
MK		 735 mutex_unlock(&local->mtx);
736 }
4d6c36fa 737 /* might already be clear but that doesn't matter */
2d2080c3 738 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 739 return res;
740}
741
34d4bc4d 742static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 743{
744 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 745 int err;
746
747 /* fail early if user set an invalid address */
2fcf2824 748 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 749 return -EADDRNOTAVAIL;
750
751 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
752 if (err)
753 return err;
754
f142c6b9 755 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 756}
757
758static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
759 bool going_down)
760{
0d143fe1 761 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 762 unsigned long flags;
763 struct sk_buff *skb, *tmp;
e8975581 764 u32 hw_reconf_flags = 0;
09f4114e 765 int i, flushed;
397a7a24 766 struct ps_data *ps;
d2859df5 767 struct cfg80211_chan_def chandef;
0d143fe1 768
c29acf20
RM		 769 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
770
e2fd5dbc 771 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 772 ieee80211_scan_cancel(local);
773
0d143fe1
JB		 774 /*
775 * Stop TX on this interface first.
776 */
f142c6b9
JB		 777 if (sdata->dev)
778 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 779
c8f994ee 780 ieee80211_roc_purge(local, sdata);
af6b6374 781
8ffcc704
EG		 782 switch (sdata->vif.type) {
783 case NL80211_IFTYPE_STATION:
572078be 784 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 785 break;
786 case NL80211_IFTYPE_ADHOC:
cd7760e6 787 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 788 break;
789 case NL80211_IFTYPE_AP:
790 cancel_work_sync(&sdata->u.ap.request_smps_work);
791 break;
792 default:
793 break;
794 }
cd7760e6 795
0d143fe1
JB		 796 /*
797 * Remove all stations associated with this interface.
798 *
799 * This must be done before calling ops->remove_interface()
800 * because otherwise we can later invoke ops->sta_notify()
801 * whenever the STAs are removed, and that invalidates driver
802 * assumptions about always getting a vif pointer that is valid
803 * (because if we remove a STA after ops->remove_interface()
804 * the driver will have removed the vif info already!)
805 *
09f4114e
JB		 806 * This is relevant only in WDS mode, in all other modes we've
807 * already removed all stations when disconnecting or similar,
808 * so warn otherwise.
0d143fe1 809 */
d34ba216 810 flushed = sta_info_flush(sdata);
09f4114e
JB		 811 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
812 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 813
afdc7c18 814 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 815 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
816 atomic_dec(&local->iff_allmultis);
817
818 if (sdata->flags & IEEE80211_SDATA_PROMISC)
819 atomic_dec(&local->iff_promiscs);
820
7be5086d 821 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 822 local->fif_pspoll--;
7be5086d
JB		 823 local->fif_probe_req--;
824 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
825 local->fif_probe_req--;
826 }
e3b90ca2 827
f142c6b9
JB		 828 if (sdata->dev) {
829 netif_addr_lock_bh(sdata->dev);
830 spin_lock_bh(&local->filter_lock);
831 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
832 sdata->dev->addr_len);
833 spin_unlock_bh(&local->filter_lock);
834 netif_addr_unlock_bh(sdata->dev);
f142c6b9 835 }
3ac64bee 836
7cbf0ba5
VN		 837 del_timer_sync(&local->dynamic_ps_timer);
838 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 839
04ecd257 840 cancel_work_sync(&sdata->recalc_smps);
dbd72850 841 sdata_lock(sdata);
59af6928 842 mutex_lock(&local->mtx);
73da7d5b 843 sdata->vif.csa_active = false;
59af6928
MK		 844 if (!ieee80211_csa_needs_block_tx(local))
845 ieee80211_wake_queues_by_reason(&local->hw,
846 IEEE80211_MAX_QUEUE_MAP,
847 IEEE80211_QUEUE_STOP_REASON_CSA);
848 mutex_unlock(&local->mtx);
dbd72850 849 sdata_unlock(sdata);
59af6928 850
73da7d5b 851 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 852
164eb02d
SW		 853 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
854
855 if (sdata->wdev.cac_started) {
d2859df5 856 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 857 WARN_ON(local->suspended);
34a3740d 858 mutex_lock(&local->mtx);
164eb02d 859 ieee80211_vif_release_channel(sdata);
34a3740d 860 mutex_unlock(&local->mtx);
d2859df5
JD		 861 cfg80211_cac_event(sdata->dev, &chandef,
862 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 863 GFP_KERNEL);
864 }
865
0d143fe1
JB		 866 /* APs need special treatment */
867 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 868 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 869
870 /* down all dependent devices, that is VLANs */
57c9fff3 871 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 872 u.vlan.list)
873 dev_close(vlan->dev);
874 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 875 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
876 /* remove all packets in parent bc_buf pointing to this dev */
877 ps = &sdata->bss->ps;
878
879 spin_lock_irqsave(&ps->bc_buf.lock, flags);
880 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
881 if (skb->dev == sdata->dev) {
882 __skb_unlink(skb, &ps->bc_buf);
883 local->total_ps_buffered--;
884 ieee80211_free_txskb(&local->hw, skb);
885 }
886 }
887 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 888 }
889
34d4bc4d
JB		 890 if (going_down)
891 local->open_count--;
0d143fe1
JB		 892
893 switch (sdata->vif.type) {
894 case NL80211_IFTYPE_AP_VLAN:
4e141dad 895 mutex_lock(&local->mtx);
0d143fe1 896 list_del(&sdata->u.vlan.list);
4e141dad 897 mutex_unlock(&local->mtx);
0c2bef46 898 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 899 /* no need to tell driver */
900 break;
901 case NL80211_IFTYPE_MONITOR:
902 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
903 local->cooked_mntrs--;
904 break;
905 }
906
907 local->monitors--;
e8975581 908 if (local->monitors == 0) {
0869aea0
JB		 909 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
910 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 911 }
0d143fe1 912
85416a4f 913 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 914 break;
f142c6b9
JB		 915 case NL80211_IFTYPE_P2P_DEVICE:
916 /* relies on synchronize_rcu() below */
0c2bef46 917 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 918 /* fall through */
0d143fe1 919 default:
0b7dff4f 920 cancel_work_sync(&sdata->work);
35f20c14
JB		 921 /*
922 * When we get here, the interface is marked down.
7907c7d3
JB		 923 * Free the remaining keys, if there are any
924 * (shouldn't be, except maybe in WDS mode?)
75de9113 925 *
7907c7d3
JB		 926 * Force the key freeing to always synchronize_net()
927 * to wait for the RX path in case it is using this
928 * interface enqueuing frames * at this very time on
75de9113 929 * another CPU.
35f20c14 930 */
7907c7d3 931 ieee80211_free_keys(sdata, true);
b9dcf712 932
1861b845
JB		 933 /* fall through */
934 case NL80211_IFTYPE_AP:
935 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 936 }
937
938 sdata->bss = NULL;
939
5061b0c2
JB		 940 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
941 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
942 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
943 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
944 if (info->control.vif == &sdata->vif) {
945 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 946 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 947 }
948 }
949 }
950 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 951
b2c0958b
JB		 952 if (local->open_count == 0)
953 ieee80211_clear_tx_pending(local);
954
955 /*
956 * If the interface goes down while suspended, presumably because
957 * the device was unplugged and that happens before our resume,
958 * then the driver is already unconfigured and the remainder of
959 * this function isn't needed.
960 * XXX: what about WoWLAN? If the device has software state, e.g.
961 * memory allocated, it might expect teardown commands from
962 * mac80211 here?
963 */
964 if (local->suspended) {
965 WARN_ON(local->wowlan);
966 WARN_ON(rtnl_dereference(local->monitor_sdata));
967 return;
968 }
969
970 switch (sdata->vif.type) {
971 case NL80211_IFTYPE_AP_VLAN:
972 break;
973 case NL80211_IFTYPE_MONITOR:
974 if (local->monitors == 0)
975 ieee80211_del_virtual_monitor(local);
976
977 mutex_lock(&local->mtx);
978 ieee80211_recalc_idle(local);
979 mutex_unlock(&local->mtx);
31eba5bc
FF		 980
981 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
982 break;
983
984 /* fall through */
b2c0958b
JB		 985 default:
986 if (going_down)
987 drv_remove_interface(local, sdata);
988 }
989
990 ieee80211_recalc_ps(local, -1);
991
992 if (local->open_count == 0) {
993 ieee80211_stop_device(local);
994
995 /* no reconfiguring after stop! */
996 return;
997 }
998
999 /* do after stop to avoid reconfiguring when we stop anyway */
1000 ieee80211_configure_filter(local);
1001 ieee80211_hw_config(local, hw_reconf_flags);
1002
1003 if (local->monitors == local->open_count)
075e0847 1004 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1005}
1006
1007static int ieee80211_stop(struct net_device *dev)
1008{
1009 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1010
1011 ieee80211_do_stop(sdata, true);
5061b0c2 1012
0d143fe1
JB		 1013 return 0;
1014}
1015
1016static void ieee80211_set_multicast_list(struct net_device *dev)
1017{
0d143fe1 1018 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1019 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1020 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1021
1022 allmulti = !!(dev->flags & IFF_ALLMULTI);
1023 promisc = !!(dev->flags & IFF_PROMISC);
1024 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1025 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1026
1027 if (allmulti != sdata_allmulti) {
1028 if (dev->flags & IFF_ALLMULTI)
1029 atomic_inc(&local->iff_allmultis);
1030 else
1031 atomic_dec(&local->iff_allmultis);
1032 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1033 }
1034
1035 if (promisc != sdata_promisc) {
1036 if (dev->flags & IFF_PROMISC)
1037 atomic_inc(&local->iff_promiscs);
1038 else
1039 atomic_dec(&local->iff_promiscs);
1040 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1041 }
3b8d81e0 1042 spin_lock_bh(&local->filter_lock);
22bedad3 1043 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1044 spin_unlock_bh(&local->filter_lock);
3ac64bee 1045 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1046}
1047
75636525
JB		 1048/*
1049 * Called when the netdev is removed or, by the code below, before
1050 * the interface type changes.
1051 */
f142c6b9 1052static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1053{
1054 int i;
1055
75636525 1056 /* free extra data */
7907c7d3 1057 ieee80211_free_keys(sdata, false);
75636525 1058
aee14ceb
JM		 1059 ieee80211_debugfs_remove_netdev(sdata);
1060
f0706e82 1061 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1062 __skb_queue_purge(&sdata->fragments[i].skb_list);
1063 sdata->fragment_next = 0;
11a843b7 1064
b9dcf712
JB		 1065 if (ieee80211_vif_is_mesh(&sdata->vif))
1066 mesh_rmc_free(sdata);
f0706e82
JB		 1067}
1068
f142c6b9
JB		 1069static void ieee80211_uninit(struct net_device *dev)
1070{
1071 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1072}
1073
cf0277e7 1074static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1075 struct sk_buff *skb,
99932d4f
DB		 1076 void *accel_priv,
1077 select_queue_fallback_t fallback)
cf0277e7
JB		 1078{
1079 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1080}
1081
587e729e
JB		 1082static const struct net_device_ops ieee80211_dataif_ops = {
1083 .ndo_open = ieee80211_open,
1084 .ndo_stop = ieee80211_stop,
f142c6b9 1085 .ndo_uninit = ieee80211_uninit,
587e729e 1086 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1087 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1088 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1089 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1090 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1091};
1092
cf0277e7 1093static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1094 struct sk_buff *skb,
99932d4f
DB		 1095 void *accel_priv,
1096 select_queue_fallback_t fallback)
cf0277e7
JB		 1097{
1098 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1099 struct ieee80211_local *local = sdata->local;
1100 struct ieee80211_hdr *hdr;
1101 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1102
32c5057b 1103 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1104 return 0;
1105
1106 if (skb->len < 4 ||
b49bb574 1107 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1108 return 0; /* doesn't matter, frame will be dropped */
1109
b49bb574 1110 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1111
00e96dec 1112 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1113}
1114
587e729e
JB		 1115static const struct net_device_ops ieee80211_monitorif_ops = {
1116 .ndo_open = ieee80211_open,
1117 .ndo_stop = ieee80211_stop,
f142c6b9 1118 .ndo_uninit = ieee80211_uninit,
587e729e 1119 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1120 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1121 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1122 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1123 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1124};
1125
1126static void ieee80211_if_setup(struct net_device *dev)
1127{
1128 ether_setup(dev);
550fd08c 1129 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1130 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1131 dev->destructor = free_netdev;
1132}
1133
1fa57d01
JB		 1134static void ieee80211_iface_work(struct work_struct *work)
1135{
1136 struct ieee80211_sub_if_data *sdata =
1137 container_of(work, struct ieee80211_sub_if_data, work);
1138 struct ieee80211_local *local = sdata->local;
1139 struct sk_buff *skb;
344eec67 1140 struct sta_info *sta;
c1475ca9 1141 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1142
1143 if (!ieee80211_sdata_running(sdata))
1144 return;
1145
1146 if (local->scanning)
1147 return;
1148
1149 /*
1150 * ieee80211_queue_work() should have picked up most cases,
1151 * here we'll pick the rest.
1152 */
1153 if (WARN(local->suspended,
1154 "interface work scheduled while going to suspend\n"))
1155 return;
1156
1157 /* first process frames */
1158 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1159 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1160
c1475ca9
JB		 1161 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1162 ra_tid = (void *)&skb->cb;
1163 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1164 ra_tid->tid);
1165 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1166 ra_tid = (void *)&skb->cb;
1167 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1168 ra_tid->tid);
1169 } else if (ieee80211_is_action(mgmt->frame_control) &&
1170 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1171 int len = skb->len;
bed7ee6e 1172
a93e3644 1173 mutex_lock(&local->sta_mtx);
875ae5f6 1174 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1175 if (sta) {
1176 switch (mgmt->u.action.u.addba_req.action_code) {
1177 case WLAN_ACTION_ADDBA_REQ:
1178 ieee80211_process_addba_request(
1179 local, sta, mgmt, len);
1180 break;
1181 case WLAN_ACTION_ADDBA_RESP:
1182 ieee80211_process_addba_resp(local, sta,
1183 mgmt, len);
1184 break;
1185 case WLAN_ACTION_DELBA:
1186 ieee80211_process_delba(sdata, sta,
1187 mgmt, len);
1188 break;
1189 default:
1190 WARN_ON(1);
1191 break;
1192 }
1193 }
a93e3644 1194 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1195 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1196 struct ieee80211_hdr *hdr = (void *)mgmt;
1197 /*
1198 * So the frame isn't mgmt, but frame_control
1199 * is at the right place anyway, of course, so
1200 * the if statement is correct.
1201 *
1202 * Warn if we have other data frame types here,
1203 * they must not get here.
1204 */
1205 WARN_ON(hdr->frame_control &
1206 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1207 WARN_ON(!(hdr->seq_ctrl &
1208 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1209 /*
1210 * This was a fragment of a frame, received while
1211 * a block-ack session was active. That cannot be
1212 * right, so terminate the session.
1213 */
a93e3644 1214 mutex_lock(&local->sta_mtx);
875ae5f6 1215 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1216 if (sta) {
1217 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1218 IEEE80211_QOS_CTL_TID_MASK;
1219
1220 __ieee80211_stop_rx_ba_session(
1221 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1222 WLAN_REASON_QSTA_REQUIRE_SETUP,
1223 true);
344eec67 1224 }
a93e3644 1225 mutex_unlock(&local->sta_mtx);
bed7ee6e 1226 } else switch (sdata->vif.type) {
1fa57d01
JB		 1227 case NL80211_IFTYPE_STATION:
1228 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1229 break;
1230 case NL80211_IFTYPE_ADHOC:
1231 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1232 break;
1233 case NL80211_IFTYPE_MESH_POINT:
1234 if (!ieee80211_vif_is_mesh(&sdata->vif))
1235 break;
1236 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1237 break;
1238 default:
1239 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1240 break;
1241 }
36b3a628
JB		 1242
1243 kfree_skb(skb);
1fa57d01
JB		 1244 }
1245
1246 /* then other type-dependent work */
1247 switch (sdata->vif.type) {
1248 case NL80211_IFTYPE_STATION:
1249 ieee80211_sta_work(sdata);
1250 break;
1251 case NL80211_IFTYPE_ADHOC:
1252 ieee80211_ibss_work(sdata);
1253 break;
1254 case NL80211_IFTYPE_MESH_POINT:
1255 if (!ieee80211_vif_is_mesh(&sdata->vif))
1256 break;
1257 ieee80211_mesh_work(sdata);
1258 break;
1259 default:
1260 break;
1261 }
1262}
1263
04ecd257
JB		 1264static void ieee80211_recalc_smps_work(struct work_struct *work)
1265{
1266 struct ieee80211_sub_if_data *sdata =
1267 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1268
1269 ieee80211_recalc_smps(sdata);
1270}
1fa57d01 1271
75636525
JB		 1272/*
1273 * Helper function to initialise an interface to a specific type.
1274 */
1275static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1276 enum nl80211_iftype type)
f0706e82 1277{
75636525
JB		 1278 /* clear type-dependent union */
1279 memset(&sdata->u, 0, sizeof(sdata->u));
1280
1281 /* and set some type-dependent values */
1282 sdata->vif.type = type;
2ca27bcf 1283 sdata->vif.p2p = false;
60719ffd 1284 sdata->wdev.iftype = type;
75636525 1285
a621fa4d
JB		 1286 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1287 sdata->control_port_no_encrypt = false;
2475b1cc 1288 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1289 sdata->vif.bss_conf.idle = true;
a621fa4d 1290
b53be792
SW		 1291 sdata->noack_map = 0;
1292
f142c6b9
JB		 1293 /* only monitor/p2p-device differ */
1294 if (sdata->dev) {
1295 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1296 sdata->dev->type = ARPHRD_ETHER;
1297 }
75636525 1298
35f20c14 1299 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1300 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1301 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1302 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1303 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1304 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1305
75636525 1306 switch (type) {
2ca27bcf
JB		 1307 case NL80211_IFTYPE_P2P_GO:
1308 type = NL80211_IFTYPE_AP;
1309 sdata->vif.type = type;
1310 sdata->vif.p2p = true;
1311 /* fall through */
05c914fe 1312 case NL80211_IFTYPE_AP:
d012a605 1313 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1314 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1315 INIT_WORK(&sdata->u.ap.request_smps_work,
1316 ieee80211_request_smps_ap_work);
ad2d223a 1317 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1318 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1319 break;
2ca27bcf
JB		 1320 case NL80211_IFTYPE_P2P_CLIENT:
1321 type = NL80211_IFTYPE_STATION;
1322 sdata->vif.type = type;
1323 sdata->vif.p2p = true;
1324 /* fall through */
05c914fe 1325 case NL80211_IFTYPE_STATION:
ad2d223a 1326 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1327 ieee80211_sta_setup_sdata(sdata);
472dbc45 1328 break;
46900298 1329 case NL80211_IFTYPE_ADHOC:
ad2d223a 1330 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1331 ieee80211_ibss_setup_sdata(sdata);
1332 break;
05c914fe 1333 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1334 if (ieee80211_vif_is_mesh(&sdata->vif))
1335 ieee80211_mesh_init_sdata(sdata);
1336 break;
05c914fe 1337 case NL80211_IFTYPE_MONITOR:
75636525 1338 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1339 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1340 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1341 MONITOR_FLAG_OTHER_BSS;
1342 break;
05c914fe 1343 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1344 sdata->vif.bss_conf.bssid = NULL;
1345 break;
05c914fe 1346 case NL80211_IFTYPE_AP_VLAN:
98104fde 1347 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1348 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1349 break;
05c914fe 1350 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1351 case NUM_NL80211_IFTYPES:
75636525
JB		 1352 BUG();
1353 break;
1354 }
1355
1356 ieee80211_debugfs_add_netdev(sdata);
1357}
1358
34d4bc4d
JB		 1359static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1360 enum nl80211_iftype type)
1361{
1362 struct ieee80211_local *local = sdata->local;
1363 int ret, err;
2ca27bcf
JB		 1364 enum nl80211_iftype internal_type = type;
1365 bool p2p = false;
34d4bc4d
JB		 1366
1367 ASSERT_RTNL();
1368
1369 if (!local->ops->change_interface)
1370 return -EBUSY;
1371
1372 switch (sdata->vif.type) {
1373 case NL80211_IFTYPE_AP:
1374 case NL80211_IFTYPE_STATION:
1375 case NL80211_IFTYPE_ADHOC:
1376 /*
1377 * Could maybe also all others here?
1378 * Just not sure how that interacts
1379 * with the RX/config path e.g. for
1380 * mesh.
1381 */
1382 break;
1383 default:
1384 return -EBUSY;
1385 }
1386
1387 switch (type) {
1388 case NL80211_IFTYPE_AP:
1389 case NL80211_IFTYPE_STATION:
1390 case NL80211_IFTYPE_ADHOC:
1391 /*
1392 * Could probably support everything
1393 * but WDS here (WDS do_open can fail
1394 * under memory pressure, which this
1395 * code isn't prepared to handle).
1396 */
1397 break;
2ca27bcf
JB		 1398 case NL80211_IFTYPE_P2P_CLIENT:
1399 p2p = true;
1400 internal_type = NL80211_IFTYPE_STATION;
1401 break;
1402 case NL80211_IFTYPE_P2P_GO:
1403 p2p = true;
1404 internal_type = NL80211_IFTYPE_AP;
1405 break;
34d4bc4d
JB		 1406 default:
1407 return -EBUSY;
1408 }
1409
2ca27bcf 1410 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1411 if (ret)
1412 return ret;
1413
1414 ieee80211_do_stop(sdata, false);
1415
f142c6b9 1416 ieee80211_teardown_sdata(sdata);
34d4bc4d 1417
2ca27bcf 1418 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1419 if (ret)
a9865538 1420 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1421
3a25a8c8
JB		 1422 /*
1423 * Ignore return value here, there's not much we can do since
1424 * the driver changed the interface type internally already.
1425 * The warnings will hopefully make driver authors fix it :-)
1426 */
a9865538 1427 ieee80211_check_queues(sdata, type);
3a25a8c8 1428
34d4bc4d
JB		 1429 ieee80211_setup_sdata(sdata, type);
1430
f142c6b9 1431 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1432 WARN(err, "type change: do_open returned %d", err);
1433
1434 return ret;
1435}
1436
f3947e2d 1437int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1438 enum nl80211_iftype type)
75636525 1439{
34d4bc4d
JB		 1440 int ret;
1441
f3947e2d
JB		 1442 ASSERT_RTNL();
1443
2ca27bcf 1444 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1445 return 0;
1446
34d4bc4d
JB		 1447 if (ieee80211_sdata_running(sdata)) {
1448 ret = ieee80211_runtime_change_iftype(sdata, type);
1449 if (ret)
1450 return ret;
1451 } else {
1452 /* Purge and reset type-dependent state. */
f142c6b9 1453 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1454 ieee80211_setup_sdata(sdata, type);
1455 }
75636525
JB		 1456
1457 /* reset some values that shouldn't be kept across type changes */
75636525 1458 sdata->drop_unencrypted = 0;
9bc383de
JB		 1459 if (type == NL80211_IFTYPE_STATION)
1460 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1461
1462 return 0;
f0706e82
JB		 1463}
1464
fa9029f8 1465static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1466 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1467{
1468 struct ieee80211_sub_if_data *sdata;
1469 u64 mask, start, addr, val, inc;
1470 u8 *m;
1471 u8 tmp_addr[ETH_ALEN];
1472 int i;
1473
1474 /* default ... something at least */
f142c6b9 1475 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1476
1477 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1478 local->hw.wiphy->n_addresses <= 1)
1479 return;
1480
fa9029f8
JB		 1481 mutex_lock(&local->iflist_mtx);
1482
1483 switch (type) {
1484 case NL80211_IFTYPE_MONITOR:
1485 /* doesn't matter */
1486 break;
1487 case NL80211_IFTYPE_WDS:
1488 case NL80211_IFTYPE_AP_VLAN:
1489 /* match up with an AP interface */
1490 list_for_each_entry(sdata, &local->interfaces, list) {
1491 if (sdata->vif.type != NL80211_IFTYPE_AP)
1492 continue;
f142c6b9 1493 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1494 break;
1495 }
1496 /* keep default if no AP interface present */
1497 break;
6d71117a
JB		 1498 case NL80211_IFTYPE_P2P_CLIENT:
1499 case NL80211_IFTYPE_P2P_GO:
1500 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1501 list_for_each_entry(sdata, &local->interfaces, list) {
1502 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1503 continue;
1504 if (!ieee80211_sdata_running(sdata))
1505 continue;
1506 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1507 goto out_unlock;
1508 }
1509 }
1510 /* otherwise fall through */
fa9029f8
JB		 1511 default:
1512 /* assign a new address if possible -- try n_addresses first */
1513 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1514 bool used = false;
1515
1516 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1517 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1518 sdata->vif.addr)) {
fa9029f8
JB		 1519 used = true;
1520 break;
1521 }
1522 }
1523
1524 if (!used) {
f142c6b9 1525 memcpy(perm_addr,
fa9029f8
JB		 1526 local->hw.wiphy->addresses[i].addr,
1527 ETH_ALEN);
1528 break;
1529 }
1530 }
1531
1532 /* try mask if available */
1533 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1534 break;
1535
1536 m = local->hw.wiphy->addr_mask;
1537 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1538 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1539 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1540
1541 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1542 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1543 pr_info("not contiguous\n");
fa9029f8
JB		 1544 break;
1545 }
1546
ac20976d
HS		 1547 /*
1548 * Pick address of existing interface in case user changed
1549 * MAC address manually, default to perm_addr.
1550 */
fa9029f8 1551 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1552 list_for_each_entry(sdata, &local->interfaces, list) {
1553 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1554 continue;
1555 m = sdata->vif.addr;
1556 break;
1557 }
fa9029f8
JB		 1558 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1559 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1560 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1561
1562 inc = 1ULL<<__ffs64(mask);
1563 val = (start & mask);
1564 addr = (start & ~mask) | (val & mask);
1565 do {
1566 bool used = false;
1567
1568 tmp_addr[5] = addr >> 0*8;
1569 tmp_addr[4] = addr >> 1*8;
1570 tmp_addr[3] = addr >> 2*8;
1571 tmp_addr[2] = addr >> 3*8;
1572 tmp_addr[1] = addr >> 4*8;
1573 tmp_addr[0] = addr >> 5*8;
1574
1575 val += inc;
1576
1577 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1578 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1579 used = true;
1580 break;
1581 }
1582 }
1583
1584 if (!used) {
f142c6b9 1585 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1586 break;
1587 }
1588 addr = (start & ~mask) | (val & mask);
1589 } while (addr != start);
1590
1591 break;
1592 }
1593
6d71117a 1594 out_unlock:
fa9029f8
JB		 1595 mutex_unlock(&local->iflist_mtx);
1596}
1597
3e122be0 1598int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1599 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1600 struct vif_params *params)
f0706e82 1601{
f142c6b9 1602 struct net_device *ndev = NULL;
f0706e82 1603 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1604 int ret, i;
ded81f6b 1605 int txqs = 1;
f0706e82
JB		 1606
1607 ASSERT_RTNL();
75636525 1608
f142c6b9
JB		 1609 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1610 struct wireless_dev *wdev;
1611
1612 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1613 GFP_KERNEL);
1614 if (!sdata)
1615 return -ENOMEM;
1616 wdev = &sdata->wdev;
1617
1618 sdata->dev = NULL;
1619 strlcpy(sdata->name, name, IFNAMSIZ);
1620 ieee80211_assign_perm_addr(local, wdev->address, type);
1621 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1622 } else {
1623 if (local->hw.queues >= IEEE80211_NUM_ACS)
1624 txqs = IEEE80211_NUM_ACS;
1625
1626 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1627 local->hw.vif_data_size,
1628 name, ieee80211_if_setup, txqs, 1);
1629 if (!ndev)
1630 return -ENOMEM;
1631 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1632
1633 ndev->needed_headroom = local->tx_headroom +
1634 4*6 /* four MAC addresses */
1635 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1636 + 6 /* mesh */
1637 + 8 /* rfc1042/bridge tunnel */
1638 - ETH_HLEN /* ethernet hard_header_len */
1639 + IEEE80211_ENCRYPT_HEADROOM;
1640 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1641
1642 ret = dev_alloc_name(ndev, ndev->name);
1643 if (ret < 0) {
1644 free_netdev(ndev);
1645 return ret;
1646 }
1647
1648 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1649 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1650 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1651
1652 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1653 sdata = netdev_priv(ndev);
1654 ndev->ieee80211_ptr = &sdata->wdev;
1655 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1656 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1657
1658 sdata->dev = ndev;
1659 }
75636525
JB		 1660
1661 /* initialise type-independent data */
f0706e82 1662 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1663 sdata->local = local;
75636525
JB		 1664
1665 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1666 skb_queue_head_init(&sdata->fragments[i].skb_list);
1667
1668 INIT_LIST_HEAD(&sdata->key_list);
1669
164eb02d
SW		 1670 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1671 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1672 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1673 ieee80211_delayed_tailroom_dec);
97f97b1f 1674
37eb0b16
JM		 1675 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1676 struct ieee80211_supported_band *sband;
1677 sband = local->hw.wiphy->bands[i];
1678 sdata->rc_rateidx_mask[i] =
1679 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1680 if (sband)
1681 memcpy(sdata->rc_rateidx_mcs_mask[i],
1682 sband->ht_cap.mcs.rx_mask,
1683 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1684 else
1685 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1686 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1687 }
75636525 1688
3a25a8c8
JB		 1689 ieee80211_set_default_queues(sdata);
1690
1ea6f9c0
JB		 1691 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1692 sdata->user_power_level = local->user_power_level;
1693
2475b1cc
MS		 1694 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1695
75636525
JB		 1696 /* setup type-dependent data */
1697 ieee80211_setup_sdata(sdata, type);
f0706e82 1698
f142c6b9
JB		 1699 if (ndev) {
1700 if (params) {
1701 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1702 if (type == NL80211_IFTYPE_STATION)
1703 sdata->u.mgd.use_4addr = params->use_4addr;
1704 }
9bc383de 1705
f142c6b9 1706 ndev->features |= local->hw.netdev_features;
72d78728 1707
f142c6b9
JB		 1708 ret = register_netdevice(ndev);
1709 if (ret) {
1710 free_netdev(ndev);
1711 return ret;
1712 }
1713 }
f0706e82 1714
c771c9d8 1715 mutex_lock(&local->iflist_mtx);
79010420 1716 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1717 mutex_unlock(&local->iflist_mtx);
79010420 1718
84efbb84
JB		 1719 if (new_wdev)
1720 *new_wdev = &sdata->wdev;
f0706e82 1721
f0706e82 1722 return 0;
f0706e82
JB		 1723}
1724
f698d856 1725void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1726{
f0706e82 1727 ASSERT_RTNL();
11a843b7 1728
c771c9d8 1729 mutex_lock(&sdata->local->iflist_mtx);
75636525 1730 list_del_rcu(&sdata->list);
c771c9d8
JB		 1731 mutex_unlock(&sdata->local->iflist_mtx);
1732
75636525 1733 synchronize_rcu();
f142c6b9
JB		 1734
1735 if (sdata->dev) {
1736 unregister_netdevice(sdata->dev);
1737 } else {
1738 cfg80211_unregister_wdev(&sdata->wdev);
1739 kfree(sdata);
1740 }
1741}
1742
1743void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1744{
1745 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1746 return;
1747 ieee80211_do_stop(sdata, true);
1748 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1749}
1750
75636525
JB		 1751/*
1752 * Remove all interfaces, may only be called at hardware unregistration
1753 * time because it doesn't do RCU-safe list removals.
1754 */
1755void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1756{
75636525 1757 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1758 LIST_HEAD(unreg_list);
f142c6b9 1759 LIST_HEAD(wdev_list);
f0706e82
JB		 1760
1761 ASSERT_RTNL();
1762
c8aa22db
JB		 1763 /*
1764 * Close all AP_VLAN interfaces first, as otherwise they
1765 * might be closed while the AP interface they belong to
1766 * is closed, causing unregister_netdevice_many() to crash.
1767 */
1768 list_for_each_entry(sdata, &local->interfaces, list)
1769 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1770 dev_close(sdata->dev);
1771
efe117ab 1772 mutex_lock(&local->iflist_mtx);
75636525
JB		 1773 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1774 list_del(&sdata->list);
c771c9d8 1775
f142c6b9
JB		 1776 if (sdata->dev)
1777 unregister_netdevice_queue(sdata->dev, &unreg_list);
1778 else
1779 list_add(&sdata->list, &wdev_list);
f0706e82 1780 }
efe117ab
ED		 1781 mutex_unlock(&local->iflist_mtx);
1782 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1783
1784 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1785 list_del(&sdata->list);
1786 cfg80211_unregister_wdev(&sdata->wdev);
1787 kfree(sdata);
1788 }
f0706e82 1789}
5cff20e6 1790
47846c9b 1791static int netdev_notify(struct notifier_block *nb,
351638e7 1792 unsigned long state, void *ptr)
47846c9b 1793{
351638e7 1794 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1795 struct ieee80211_sub_if_data *sdata;
1796
1797 if (state != NETDEV_CHANGENAME)
8bd811aa 1798 return NOTIFY_DONE;
47846c9b
JB		 1799
1800 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1801 return NOTIFY_DONE;
47846c9b
JB		 1802
1803 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1804 return NOTIFY_DONE;
47846c9b
JB		 1805
1806 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1807 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1808 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1809
1810 return NOTIFY_OK;
47846c9b
JB		 1811}
1812
1813static struct notifier_block mac80211_netdev_notifier = {
1814 .notifier_call = netdev_notify,
1815};
1816
1817int ieee80211_iface_init(void)
1818{
1819 return register_netdevice_notifier(&mac80211_netdev_notifier);
1820}
1821
1822void ieee80211_iface_exit(void)
1823{
1824 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1825}
Linux 6.x block layer and io_uring tree(s)