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mac80211: add support for radar detection for reservations
[people/ms/linux.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));
402
2475b1cc
MS		 403 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
404
3a25a8c8
JB		 405 ieee80211_set_default_queues(sdata);
406
4b6f1dd6
JB		 407 ret = drv_add_interface(local, sdata);
408 if (WARN_ON(ret)) {
409 /* ok .. stupid driver, it asked for this! */
410 kfree(sdata);
8b305780 411 return ret;
4b6f1dd6
JB		 412 }
413
a9865538 414 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 415 if (ret) {
416 kfree(sdata);
8b305780 417 return ret;
3a25a8c8
JB		 418 }
419
fab57a6c
JB		 420 mutex_lock(&local->iflist_mtx);
421 rcu_assign_pointer(local->monitor_sdata, sdata);
422 mutex_unlock(&local->iflist_mtx);
423
34a3740d 424 mutex_lock(&local->mtx);
4bf88530 425 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 426 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 427 mutex_unlock(&local->mtx);
55de908a 428 if (ret) {
fab57a6c 429 mutex_lock(&local->iflist_mtx);
0c2bef46 430 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 431 mutex_unlock(&local->iflist_mtx);
432 synchronize_net();
55de908a
JB		 433 drv_remove_interface(local, sdata);
434 kfree(sdata);
8b305780 435 return ret;
55de908a
JB		 436 }
437
8b305780 438 return 0;
4b6f1dd6
JB		 439}
440
3c3e21e7 441void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 442{
443 struct ieee80211_sub_if_data *sdata;
444
445 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
446 return;
447
8b305780
JB		 448 ASSERT_RTNL();
449
685fb72b 450 mutex_lock(&local->iflist_mtx);
4b6f1dd6 451
685fb72b
JB		 452 sdata = rcu_dereference_protected(local->monitor_sdata,
453 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 454 if (!sdata) {
455 mutex_unlock(&local->iflist_mtx);
456 return;
457 }
4b6f1dd6 458
0c2bef46 459 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 460 mutex_unlock(&local->iflist_mtx);
461
4b6f1dd6
JB		 462 synchronize_net();
463
34a3740d 464 mutex_lock(&local->mtx);
55de908a 465 ieee80211_vif_release_channel(sdata);
34a3740d 466 mutex_unlock(&local->mtx);
55de908a 467
4b6f1dd6
JB		 468 drv_remove_interface(local, sdata);
469
470 kfree(sdata);
471}
472
34d4bc4d
JB		 473/*
474 * NOTE: Be very careful when changing this function, it must NOT return
475 * an error on interface type changes that have been pre-checked, so most
476 * checks should be in ieee80211_check_concurrent_iface.
477 */
f142c6b9 478int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 479{
f142c6b9
JB		 480 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
481 struct net_device *dev = wdev->netdev;
87490f6d
JB		 482 struct ieee80211_local *local = sdata->local;
483 struct sta_info *sta;
484 u32 changed = 0;
485 int res;
486 u32 hw_reconf_flags = 0;
487
0d143fe1
JB		 488 switch (sdata->vif.type) {
489 case NL80211_IFTYPE_WDS:
490 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
491 return -ENOLINK;
492 break;
665c93a9
JB		 493 case NL80211_IFTYPE_AP_VLAN: {
494 struct ieee80211_sub_if_data *master;
495
0d143fe1
JB		 496 if (!sdata->bss)
497 return -ENOLINK;
665c93a9 498
4e141dad 499 mutex_lock(&local->mtx);
0d143fe1 500 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 501 mutex_unlock(&local->mtx);
665c93a9
JB		 502
503 master = container_of(sdata->bss,
504 struct ieee80211_sub_if_data, u.ap);
505 sdata->control_port_protocol =
506 master->control_port_protocol;
507 sdata->control_port_no_encrypt =
508 master->control_port_no_encrypt;
1351c5d3
JB		 509 sdata->vif.cab_queue = master->vif.cab_queue;
510 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
511 sizeof(sdata->vif.hw_queue));
0d143fe1 512 break;
665c93a9 513 }
0d143fe1
JB		 514 case NL80211_IFTYPE_AP:
515 sdata->bss = &sdata->u.ap;
516 break;
517 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 518 case NL80211_IFTYPE_STATION:
519 case NL80211_IFTYPE_MONITOR:
520 case NL80211_IFTYPE_ADHOC:
f142c6b9 521 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 522 /* no special treatment */
523 break;
524 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 525 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 526 case NL80211_IFTYPE_P2P_CLIENT:
527 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 528 /* cannot happen */
529 WARN_ON(1);
530 break;
531 }
532
533 if (local->open_count == 0) {
24487981 534 res = drv_start(local);
0d143fe1
JB		 535 if (res)
536 goto err_del_bss;
e8975581
JB		 537 /* we're brought up, everything changes */
538 hw_reconf_flags = ~0;
1f87f7d3 539 ieee80211_led_radio(local, true);
67408c8c
JB		 540 ieee80211_mod_tpt_led_trig(local,
541 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 542 }
543
544 /*
bf533e0b
JB		 545 * Copy the hopefully now-present MAC address to
546 * this interface, if it has the special null one.
0d143fe1 547 */
f142c6b9 548 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 549 memcpy(dev->dev_addr,
550 local->hw.wiphy->perm_addr,
551 ETH_ALEN);
552 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
553
554 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 555 res = -EADDRNOTAVAIL;
556 goto err_stop;
0adc23f5 557 }
0d143fe1
JB		 558 }
559
0d143fe1
JB		 560 switch (sdata->vif.type) {
561 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 562 /* no need to tell driver, but set carrier and chanctx */
563 if (rtnl_dereference(sdata->bss->beacon)) {
564 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 565 netif_carrier_on(dev);
4d76d21b 566 } else {
3edaf3e6 567 netif_carrier_off(dev);
4d76d21b 568 }
0d143fe1
JB		 569 break;
570 case NL80211_IFTYPE_MONITOR:
571 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
572 local->cooked_mntrs++;
573 break;
574 }
575
31eba5bc
FF		 576 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
577 res = drv_add_interface(local, sdata);
578 if (res)
579 goto err_stop;
580 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 581 res = ieee80211_add_virtual_monitor(local);
582 if (res)
583 goto err_stop;
584 }
585
0d143fe1
JB		 586 /* must be before the call to ieee80211_configure_filter */
587 local->monitors++;
e8975581 588 if (local->monitors == 1) {
0869aea0
JB		 589 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
590 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 591 }
0d143fe1 592
85416a4f 593 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 594 ieee80211_configure_filter(local);
801d929c
FF		 595 mutex_lock(&local->mtx);
596 ieee80211_recalc_idle(local);
597 mutex_unlock(&local->mtx);
53e9b1de
DG		 598
599 netif_carrier_on(dev);
0d143fe1 600 break;
0d143fe1 601 default:
34d4bc4d 602 if (coming_up) {
075e0847
JB		 603 ieee80211_del_virtual_monitor(local);
604
7b7eab6f 605 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 606 if (res)
607 goto err_stop;
a9865538
JB		 608 res = ieee80211_check_queues(sdata,
609 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 610 if (res)
611 goto err_del_interface;
34d4bc4d 612 }
0d143fe1 613
29cbe68c 614 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 615 local->fif_pspoll++;
7be5086d 616 local->fif_probe_req++;
e3b90ca2 617
e3b90ca2 618 ieee80211_configure_filter(local);
7be5086d
JB		 619 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
620 local->fif_probe_req++;
a3c9aa51 621 }
e3b90ca2 622
f142c6b9
JB		 623 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
624 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 625 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 626
c405c629
JB		 627 switch (sdata->vif.type) {
628 case NL80211_IFTYPE_STATION:
629 case NL80211_IFTYPE_ADHOC:
630 case NL80211_IFTYPE_AP:
631 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 632 netif_carrier_off(dev);
c405c629 633 break;
1411af15 634 case NL80211_IFTYPE_WDS:
f142c6b9 635 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 636 break;
c405c629 637 default:
a2310824
JB		 638 /* not reached */
639 WARN_ON(1);
c405c629 640 }
59034591
EP		 641
642 /*
643 * set default queue parameters so drivers don't
644 * need to initialise the hardware if the hardware
645 * doesn't start up with sane defaults
646 */
3abead59 647 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 648 }
649
2d2080c3
JB		 650 set_bit(SDATA_STATE_RUNNING, &sdata->state);
651
0d143fe1
JB		 652 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
653 /* Create STA entry for the WDS peer */
654 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
655 GFP_KERNEL);
656 if (!sta) {
657 res = -ENOMEM;
658 goto err_del_interface;
659 }
660
83d5cc01
JB		 661 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
662 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
663 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 664
665 res = sta_info_insert(sta);
666 if (res) {
667 /* STA has been freed */
668 goto err_del_interface;
669 }
1be7fe8d
BJ		 670
671 rate_control_rate_init(sta);
1411af15 672 netif_carrier_on(dev);
f142c6b9
JB		 673 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
674 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 675 }
676
0d143fe1
JB		 677 /*
678 * set_multicast_list will be invoked by the networking core
679 * which will check whether any increments here were done in
680 * error and sync them down to the hardware as filter flags.
681 */
682 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
683 atomic_inc(&local->iff_allmultis);
684
685 if (sdata->flags & IEEE80211_SDATA_PROMISC)
686 atomic_inc(&local->iff_promiscs);
687
34d4bc4d
JB		 688 if (coming_up)
689 local->open_count++;
690
59034591 691 if (hw_reconf_flags)
e8975581 692 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 693
10f644a4 694 ieee80211_recalc_ps(local, -1);
965bedad 695
2b436312
JB		 696 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
697 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
698 /* XXX: for AP_VLAN, actually track AP queues */
699 netif_tx_start_all_queues(dev);
700 } else if (dev) {
2b730daa
JB		 701 unsigned long flags;
702 int n_acs = IEEE80211_NUM_ACS;
703 int ac;
704
705 if (local->hw.queues < IEEE80211_NUM_ACS)
706 n_acs = 1;
707
708 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
709 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
710 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
711 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
712 for (ac = 0; ac < n_acs; ac++) {
713 int ac_queue = sdata->vif.hw_queue[ac];
714
715 if (local->queue_stop_reasons[ac_queue] == 0 &&
716 skb_queue_empty(&local->pending[ac_queue]))
717 netif_start_subqueue(dev, ac);
718 }
719 }
720 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
721 }
0d143fe1
JB		 722
723 return 0;
724 err_del_interface:
7b7eab6f 725 drv_remove_interface(local, sdata);
0d143fe1 726 err_stop:
24487981
JB		 727 if (!local->open_count)
728 drv_stop(local);
0d143fe1
JB		 729 err_del_bss:
730 sdata->bss = NULL;
4e141dad
MK		 731 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
732 mutex_lock(&local->mtx);
0d143fe1 733 list_del(&sdata->u.vlan.list);
4e141dad
MK		 734 mutex_unlock(&local->mtx);
735 }
4d6c36fa 736 /* might already be clear but that doesn't matter */
2d2080c3 737 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 738 return res;
739}
740
34d4bc4d 741static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 742{
743 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 744 int err;
745
746 /* fail early if user set an invalid address */
2fcf2824 747 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 748 return -EADDRNOTAVAIL;
749
750 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
751 if (err)
752 return err;
753
f142c6b9 754 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 755}
756
757static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
758 bool going_down)
759{
0d143fe1 760 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 761 unsigned long flags;
762 struct sk_buff *skb, *tmp;
e8975581 763 u32 hw_reconf_flags = 0;
09f4114e 764 int i, flushed;
397a7a24 765 struct ps_data *ps;
d2859df5 766 struct cfg80211_chan_def chandef;
0d143fe1 767
c29acf20
RM		 768 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
769
e2fd5dbc 770 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 771 ieee80211_scan_cancel(local);
772
0d143fe1
JB		 773 /*
774 * Stop TX on this interface first.
775 */
f142c6b9
JB		 776 if (sdata->dev)
777 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 778
c8f994ee 779 ieee80211_roc_purge(local, sdata);
af6b6374 780
8ffcc704
EG		 781 switch (sdata->vif.type) {
782 case NL80211_IFTYPE_STATION:
572078be 783 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 784 break;
785 case NL80211_IFTYPE_ADHOC:
cd7760e6 786 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 787 break;
788 case NL80211_IFTYPE_AP:
789 cancel_work_sync(&sdata->u.ap.request_smps_work);
790 break;
791 default:
792 break;
793 }
cd7760e6 794
0d143fe1
JB		 795 /*
796 * Remove all stations associated with this interface.
797 *
798 * This must be done before calling ops->remove_interface()
799 * because otherwise we can later invoke ops->sta_notify()
800 * whenever the STAs are removed, and that invalidates driver
801 * assumptions about always getting a vif pointer that is valid
802 * (because if we remove a STA after ops->remove_interface()
803 * the driver will have removed the vif info already!)
804 *
09f4114e
JB		 805 * This is relevant only in WDS mode, in all other modes we've
806 * already removed all stations when disconnecting or similar,
807 * so warn otherwise.
0d143fe1 808 */
d34ba216 809 flushed = sta_info_flush(sdata);
09f4114e
JB		 810 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
811 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 812
afdc7c18 813 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 814 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
815 atomic_dec(&local->iff_allmultis);
816
817 if (sdata->flags & IEEE80211_SDATA_PROMISC)
818 atomic_dec(&local->iff_promiscs);
819
7be5086d 820 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 821 local->fif_pspoll--;
7be5086d
JB		 822 local->fif_probe_req--;
823 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
824 local->fif_probe_req--;
825 }
e3b90ca2 826
f142c6b9
JB		 827 if (sdata->dev) {
828 netif_addr_lock_bh(sdata->dev);
829 spin_lock_bh(&local->filter_lock);
830 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
831 sdata->dev->addr_len);
832 spin_unlock_bh(&local->filter_lock);
833 netif_addr_unlock_bh(sdata->dev);
f142c6b9 834 }
3ac64bee 835
7cbf0ba5
VN		 836 del_timer_sync(&local->dynamic_ps_timer);
837 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 838
04ecd257 839 cancel_work_sync(&sdata->recalc_smps);
dbd72850 840 sdata_lock(sdata);
73da7d5b 841 sdata->vif.csa_active = false;
dbd72850 842 sdata_unlock(sdata);
73da7d5b 843 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 844
164eb02d
SW		 845 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
846
847 if (sdata->wdev.cac_started) {
d2859df5 848 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 849 WARN_ON(local->suspended);
34a3740d 850 mutex_lock(&local->mtx);
164eb02d 851 ieee80211_vif_release_channel(sdata);
34a3740d 852 mutex_unlock(&local->mtx);
d2859df5
JD		 853 cfg80211_cac_event(sdata->dev, &chandef,
854 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 855 GFP_KERNEL);
856 }
857
0d143fe1
JB		 858 /* APs need special treatment */
859 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 860 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 861
862 /* down all dependent devices, that is VLANs */
57c9fff3 863 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 864 u.vlan.list)
865 dev_close(vlan->dev);
866 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 867 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
868 /* remove all packets in parent bc_buf pointing to this dev */
869 ps = &sdata->bss->ps;
870
871 spin_lock_irqsave(&ps->bc_buf.lock, flags);
872 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
873 if (skb->dev == sdata->dev) {
874 __skb_unlink(skb, &ps->bc_buf);
875 local->total_ps_buffered--;
876 ieee80211_free_txskb(&local->hw, skb);
877 }
878 }
879 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 880 }
881
34d4bc4d
JB		 882 if (going_down)
883 local->open_count--;
0d143fe1
JB		 884
885 switch (sdata->vif.type) {
886 case NL80211_IFTYPE_AP_VLAN:
4e141dad 887 mutex_lock(&local->mtx);
0d143fe1 888 list_del(&sdata->u.vlan.list);
4e141dad 889 mutex_unlock(&local->mtx);
0c2bef46 890 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 891 /* no need to tell driver */
892 break;
893 case NL80211_IFTYPE_MONITOR:
894 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
895 local->cooked_mntrs--;
896 break;
897 }
898
899 local->monitors--;
e8975581 900 if (local->monitors == 0) {
0869aea0
JB		 901 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
902 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 903 }
0d143fe1 904
85416a4f 905 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 906 break;
f142c6b9
JB		 907 case NL80211_IFTYPE_P2P_DEVICE:
908 /* relies on synchronize_rcu() below */
0c2bef46 909 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 910 /* fall through */
0d143fe1 911 default:
0b7dff4f 912 cancel_work_sync(&sdata->work);
35f20c14
JB		 913 /*
914 * When we get here, the interface is marked down.
7907c7d3
JB		 915 * Free the remaining keys, if there are any
916 * (shouldn't be, except maybe in WDS mode?)
75de9113 917 *
7907c7d3
JB		 918 * Force the key freeing to always synchronize_net()
919 * to wait for the RX path in case it is using this
920 * interface enqueuing frames * at this very time on
75de9113 921 * another CPU.
35f20c14 922 */
7907c7d3 923 ieee80211_free_keys(sdata, true);
b9dcf712 924
1861b845
JB		 925 /* fall through */
926 case NL80211_IFTYPE_AP:
927 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 928 }
929
930 sdata->bss = NULL;
931
5061b0c2
JB		 932 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
933 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
934 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
935 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
936 if (info->control.vif == &sdata->vif) {
937 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 938 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 939 }
940 }
941 }
942 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 943
b2c0958b
JB		 944 if (local->open_count == 0)
945 ieee80211_clear_tx_pending(local);
946
947 /*
948 * If the interface goes down while suspended, presumably because
949 * the device was unplugged and that happens before our resume,
950 * then the driver is already unconfigured and the remainder of
951 * this function isn't needed.
952 * XXX: what about WoWLAN? If the device has software state, e.g.
953 * memory allocated, it might expect teardown commands from
954 * mac80211 here?
955 */
956 if (local->suspended) {
957 WARN_ON(local->wowlan);
958 WARN_ON(rtnl_dereference(local->monitor_sdata));
959 return;
960 }
961
962 switch (sdata->vif.type) {
963 case NL80211_IFTYPE_AP_VLAN:
964 break;
965 case NL80211_IFTYPE_MONITOR:
966 if (local->monitors == 0)
967 ieee80211_del_virtual_monitor(local);
968
969 mutex_lock(&local->mtx);
970 ieee80211_recalc_idle(local);
971 mutex_unlock(&local->mtx);
31eba5bc
FF		 972
973 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
974 break;
975
976 /* fall through */
b2c0958b
JB		 977 default:
978 if (going_down)
979 drv_remove_interface(local, sdata);
980 }
981
982 ieee80211_recalc_ps(local, -1);
983
984 if (local->open_count == 0) {
985 ieee80211_stop_device(local);
986
987 /* no reconfiguring after stop! */
988 return;
989 }
990
991 /* do after stop to avoid reconfiguring when we stop anyway */
992 ieee80211_configure_filter(local);
993 ieee80211_hw_config(local, hw_reconf_flags);
994
995 if (local->monitors == local->open_count)
075e0847 996 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 997}
998
999static int ieee80211_stop(struct net_device *dev)
1000{
1001 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1002
1003 ieee80211_do_stop(sdata, true);
5061b0c2 1004
0d143fe1
JB		 1005 return 0;
1006}
1007
1008static void ieee80211_set_multicast_list(struct net_device *dev)
1009{
0d143fe1 1010 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1011 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1012 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1013
1014 allmulti = !!(dev->flags & IFF_ALLMULTI);
1015 promisc = !!(dev->flags & IFF_PROMISC);
1016 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1017 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1018
1019 if (allmulti != sdata_allmulti) {
1020 if (dev->flags & IFF_ALLMULTI)
1021 atomic_inc(&local->iff_allmultis);
1022 else
1023 atomic_dec(&local->iff_allmultis);
1024 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1025 }
1026
1027 if (promisc != sdata_promisc) {
1028 if (dev->flags & IFF_PROMISC)
1029 atomic_inc(&local->iff_promiscs);
1030 else
1031 atomic_dec(&local->iff_promiscs);
1032 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1033 }
3b8d81e0 1034 spin_lock_bh(&local->filter_lock);
22bedad3 1035 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1036 spin_unlock_bh(&local->filter_lock);
3ac64bee 1037 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1038}
1039
75636525
JB		 1040/*
1041 * Called when the netdev is removed or, by the code below, before
1042 * the interface type changes.
1043 */
f142c6b9 1044static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1045{
1046 int i;
1047
75636525 1048 /* free extra data */
7907c7d3 1049 ieee80211_free_keys(sdata, false);
75636525 1050
aee14ceb
JM		 1051 ieee80211_debugfs_remove_netdev(sdata);
1052
f0706e82 1053 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1054 __skb_queue_purge(&sdata->fragments[i].skb_list);
1055 sdata->fragment_next = 0;
11a843b7 1056
b9dcf712
JB		 1057 if (ieee80211_vif_is_mesh(&sdata->vif))
1058 mesh_rmc_free(sdata);
f0706e82
JB		 1059}
1060
f142c6b9
JB		 1061static void ieee80211_uninit(struct net_device *dev)
1062{
1063 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1064}
1065
cf0277e7 1066static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1067 struct sk_buff *skb,
99932d4f
DB		 1068 void *accel_priv,
1069 select_queue_fallback_t fallback)
cf0277e7
JB		 1070{
1071 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1072}
1073
587e729e
JB		 1074static const struct net_device_ops ieee80211_dataif_ops = {
1075 .ndo_open = ieee80211_open,
1076 .ndo_stop = ieee80211_stop,
f142c6b9 1077 .ndo_uninit = ieee80211_uninit,
587e729e 1078 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1079 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1080 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1081 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1082 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1083};
1084
cf0277e7 1085static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1086 struct sk_buff *skb,
99932d4f
DB		 1087 void *accel_priv,
1088 select_queue_fallback_t fallback)
cf0277e7
JB		 1089{
1090 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1091 struct ieee80211_local *local = sdata->local;
1092 struct ieee80211_hdr *hdr;
1093 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1094
32c5057b 1095 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1096 return 0;
1097
1098 if (skb->len < 4 ||
b49bb574 1099 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1100 return 0; /* doesn't matter, frame will be dropped */
1101
b49bb574 1102 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1103
00e96dec 1104 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1105}
1106
587e729e
JB		 1107static const struct net_device_ops ieee80211_monitorif_ops = {
1108 .ndo_open = ieee80211_open,
1109 .ndo_stop = ieee80211_stop,
f142c6b9 1110 .ndo_uninit = ieee80211_uninit,
587e729e 1111 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1112 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1113 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1114 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1115 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1116};
1117
1118static void ieee80211_if_setup(struct net_device *dev)
1119{
1120 ether_setup(dev);
550fd08c 1121 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1122 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1123 dev->destructor = free_netdev;
1124}
1125
1fa57d01
JB		 1126static void ieee80211_iface_work(struct work_struct *work)
1127{
1128 struct ieee80211_sub_if_data *sdata =
1129 container_of(work, struct ieee80211_sub_if_data, work);
1130 struct ieee80211_local *local = sdata->local;
1131 struct sk_buff *skb;
344eec67 1132 struct sta_info *sta;
c1475ca9 1133 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1134
1135 if (!ieee80211_sdata_running(sdata))
1136 return;
1137
1138 if (local->scanning)
1139 return;
1140
1141 /*
1142 * ieee80211_queue_work() should have picked up most cases,
1143 * here we'll pick the rest.
1144 */
1145 if (WARN(local->suspended,
1146 "interface work scheduled while going to suspend\n"))
1147 return;
1148
1149 /* first process frames */
1150 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1151 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1152
c1475ca9
JB		 1153 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1154 ra_tid = (void *)&skb->cb;
1155 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1156 ra_tid->tid);
1157 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1158 ra_tid = (void *)&skb->cb;
1159 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1160 ra_tid->tid);
1161 } else if (ieee80211_is_action(mgmt->frame_control) &&
1162 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1163 int len = skb->len;
bed7ee6e 1164
a93e3644 1165 mutex_lock(&local->sta_mtx);
875ae5f6 1166 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1167 if (sta) {
1168 switch (mgmt->u.action.u.addba_req.action_code) {
1169 case WLAN_ACTION_ADDBA_REQ:
1170 ieee80211_process_addba_request(
1171 local, sta, mgmt, len);
1172 break;
1173 case WLAN_ACTION_ADDBA_RESP:
1174 ieee80211_process_addba_resp(local, sta,
1175 mgmt, len);
1176 break;
1177 case WLAN_ACTION_DELBA:
1178 ieee80211_process_delba(sdata, sta,
1179 mgmt, len);
1180 break;
1181 default:
1182 WARN_ON(1);
1183 break;
1184 }
1185 }
a93e3644 1186 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1187 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1188 struct ieee80211_hdr *hdr = (void *)mgmt;
1189 /*
1190 * So the frame isn't mgmt, but frame_control
1191 * is at the right place anyway, of course, so
1192 * the if statement is correct.
1193 *
1194 * Warn if we have other data frame types here,
1195 * they must not get here.
1196 */
1197 WARN_ON(hdr->frame_control &
1198 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1199 WARN_ON(!(hdr->seq_ctrl &
1200 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1201 /*
1202 * This was a fragment of a frame, received while
1203 * a block-ack session was active. That cannot be
1204 * right, so terminate the session.
1205 */
a93e3644 1206 mutex_lock(&local->sta_mtx);
875ae5f6 1207 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1208 if (sta) {
1209 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1210 IEEE80211_QOS_CTL_TID_MASK;
1211
1212 __ieee80211_stop_rx_ba_session(
1213 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1214 WLAN_REASON_QSTA_REQUIRE_SETUP,
1215 true);
344eec67 1216 }
a93e3644 1217 mutex_unlock(&local->sta_mtx);
bed7ee6e 1218 } else switch (sdata->vif.type) {
1fa57d01
JB		 1219 case NL80211_IFTYPE_STATION:
1220 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1221 break;
1222 case NL80211_IFTYPE_ADHOC:
1223 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1224 break;
1225 case NL80211_IFTYPE_MESH_POINT:
1226 if (!ieee80211_vif_is_mesh(&sdata->vif))
1227 break;
1228 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1229 break;
1230 default:
1231 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1232 break;
1233 }
36b3a628
JB		 1234
1235 kfree_skb(skb);
1fa57d01
JB		 1236 }
1237
1238 /* then other type-dependent work */
1239 switch (sdata->vif.type) {
1240 case NL80211_IFTYPE_STATION:
1241 ieee80211_sta_work(sdata);
1242 break;
1243 case NL80211_IFTYPE_ADHOC:
1244 ieee80211_ibss_work(sdata);
1245 break;
1246 case NL80211_IFTYPE_MESH_POINT:
1247 if (!ieee80211_vif_is_mesh(&sdata->vif))
1248 break;
1249 ieee80211_mesh_work(sdata);
1250 break;
1251 default:
1252 break;
1253 }
1254}
1255
04ecd257
JB		 1256static void ieee80211_recalc_smps_work(struct work_struct *work)
1257{
1258 struct ieee80211_sub_if_data *sdata =
1259 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1260
1261 ieee80211_recalc_smps(sdata);
1262}
1fa57d01 1263
75636525
JB		 1264/*
1265 * Helper function to initialise an interface to a specific type.
1266 */
1267static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1268 enum nl80211_iftype type)
f0706e82 1269{
75636525
JB		 1270 /* clear type-dependent union */
1271 memset(&sdata->u, 0, sizeof(sdata->u));
1272
1273 /* and set some type-dependent values */
1274 sdata->vif.type = type;
2ca27bcf 1275 sdata->vif.p2p = false;
60719ffd 1276 sdata->wdev.iftype = type;
75636525 1277
a621fa4d
JB		 1278 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1279 sdata->control_port_no_encrypt = false;
2475b1cc 1280 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1281
b53be792
SW		 1282 sdata->noack_map = 0;
1283
f142c6b9
JB		 1284 /* only monitor/p2p-device differ */
1285 if (sdata->dev) {
1286 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1287 sdata->dev->type = ARPHRD_ETHER;
1288 }
75636525 1289
35f20c14 1290 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1291 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1292 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1293 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1294
75636525 1295 switch (type) {
2ca27bcf
JB		 1296 case NL80211_IFTYPE_P2P_GO:
1297 type = NL80211_IFTYPE_AP;
1298 sdata->vif.type = type;
1299 sdata->vif.p2p = true;
1300 /* fall through */
05c914fe 1301 case NL80211_IFTYPE_AP:
d012a605 1302 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1303 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1304 INIT_WORK(&sdata->u.ap.request_smps_work,
1305 ieee80211_request_smps_ap_work);
ad2d223a 1306 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1307 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1308 break;
2ca27bcf
JB		 1309 case NL80211_IFTYPE_P2P_CLIENT:
1310 type = NL80211_IFTYPE_STATION;
1311 sdata->vif.type = type;
1312 sdata->vif.p2p = true;
1313 /* fall through */
05c914fe 1314 case NL80211_IFTYPE_STATION:
ad2d223a 1315 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1316 ieee80211_sta_setup_sdata(sdata);
472dbc45 1317 break;
46900298 1318 case NL80211_IFTYPE_ADHOC:
ad2d223a 1319 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1320 ieee80211_ibss_setup_sdata(sdata);
1321 break;
05c914fe 1322 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1323 if (ieee80211_vif_is_mesh(&sdata->vif))
1324 ieee80211_mesh_init_sdata(sdata);
1325 break;
05c914fe 1326 case NL80211_IFTYPE_MONITOR:
75636525 1327 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1328 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1329 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1330 MONITOR_FLAG_OTHER_BSS;
1331 break;
05c914fe 1332 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1333 sdata->vif.bss_conf.bssid = NULL;
1334 break;
05c914fe 1335 case NL80211_IFTYPE_AP_VLAN:
98104fde 1336 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1337 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1338 break;
05c914fe 1339 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1340 case NUM_NL80211_IFTYPES:
75636525
JB		 1341 BUG();
1342 break;
1343 }
1344
1345 ieee80211_debugfs_add_netdev(sdata);
1346}
1347
34d4bc4d
JB		 1348static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1349 enum nl80211_iftype type)
1350{
1351 struct ieee80211_local *local = sdata->local;
1352 int ret, err;
2ca27bcf
JB		 1353 enum nl80211_iftype internal_type = type;
1354 bool p2p = false;
34d4bc4d
JB		 1355
1356 ASSERT_RTNL();
1357
1358 if (!local->ops->change_interface)
1359 return -EBUSY;
1360
1361 switch (sdata->vif.type) {
1362 case NL80211_IFTYPE_AP:
1363 case NL80211_IFTYPE_STATION:
1364 case NL80211_IFTYPE_ADHOC:
1365 /*
1366 * Could maybe also all others here?
1367 * Just not sure how that interacts
1368 * with the RX/config path e.g. for
1369 * mesh.
1370 */
1371 break;
1372 default:
1373 return -EBUSY;
1374 }
1375
1376 switch (type) {
1377 case NL80211_IFTYPE_AP:
1378 case NL80211_IFTYPE_STATION:
1379 case NL80211_IFTYPE_ADHOC:
1380 /*
1381 * Could probably support everything
1382 * but WDS here (WDS do_open can fail
1383 * under memory pressure, which this
1384 * code isn't prepared to handle).
1385 */
1386 break;
2ca27bcf
JB		 1387 case NL80211_IFTYPE_P2P_CLIENT:
1388 p2p = true;
1389 internal_type = NL80211_IFTYPE_STATION;
1390 break;
1391 case NL80211_IFTYPE_P2P_GO:
1392 p2p = true;
1393 internal_type = NL80211_IFTYPE_AP;
1394 break;
34d4bc4d
JB		 1395 default:
1396 return -EBUSY;
1397 }
1398
2ca27bcf 1399 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1400 if (ret)
1401 return ret;
1402
1403 ieee80211_do_stop(sdata, false);
1404
f142c6b9 1405 ieee80211_teardown_sdata(sdata);
34d4bc4d 1406
2ca27bcf 1407 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1408 if (ret)
a9865538 1409 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1410
3a25a8c8
JB		 1411 /*
1412 * Ignore return value here, there's not much we can do since
1413 * the driver changed the interface type internally already.
1414 * The warnings will hopefully make driver authors fix it :-)
1415 */
a9865538 1416 ieee80211_check_queues(sdata, type);
3a25a8c8 1417
34d4bc4d
JB		 1418 ieee80211_setup_sdata(sdata, type);
1419
f142c6b9 1420 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1421 WARN(err, "type change: do_open returned %d", err);
1422
1423 return ret;
1424}
1425
f3947e2d 1426int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1427 enum nl80211_iftype type)
75636525 1428{
34d4bc4d
JB		 1429 int ret;
1430
f3947e2d
JB		 1431 ASSERT_RTNL();
1432
2ca27bcf 1433 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1434 return 0;
1435
34d4bc4d
JB		 1436 if (ieee80211_sdata_running(sdata)) {
1437 ret = ieee80211_runtime_change_iftype(sdata, type);
1438 if (ret)
1439 return ret;
1440 } else {
1441 /* Purge and reset type-dependent state. */
f142c6b9 1442 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1443 ieee80211_setup_sdata(sdata, type);
1444 }
75636525
JB		 1445
1446 /* reset some values that shouldn't be kept across type changes */
75636525 1447 sdata->drop_unencrypted = 0;
9bc383de
JB		 1448 if (type == NL80211_IFTYPE_STATION)
1449 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1450
1451 return 0;
f0706e82
JB		 1452}
1453
fa9029f8 1454static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1455 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1456{
1457 struct ieee80211_sub_if_data *sdata;
1458 u64 mask, start, addr, val, inc;
1459 u8 *m;
1460 u8 tmp_addr[ETH_ALEN];
1461 int i;
1462
1463 /* default ... something at least */
f142c6b9 1464 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1465
1466 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1467 local->hw.wiphy->n_addresses <= 1)
1468 return;
1469
fa9029f8
JB		 1470 mutex_lock(&local->iflist_mtx);
1471
1472 switch (type) {
1473 case NL80211_IFTYPE_MONITOR:
1474 /* doesn't matter */
1475 break;
1476 case NL80211_IFTYPE_WDS:
1477 case NL80211_IFTYPE_AP_VLAN:
1478 /* match up with an AP interface */
1479 list_for_each_entry(sdata, &local->interfaces, list) {
1480 if (sdata->vif.type != NL80211_IFTYPE_AP)
1481 continue;
f142c6b9 1482 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1483 break;
1484 }
1485 /* keep default if no AP interface present */
1486 break;
6d71117a
JB		 1487 case NL80211_IFTYPE_P2P_CLIENT:
1488 case NL80211_IFTYPE_P2P_GO:
1489 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1490 list_for_each_entry(sdata, &local->interfaces, list) {
1491 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1492 continue;
1493 if (!ieee80211_sdata_running(sdata))
1494 continue;
1495 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1496 goto out_unlock;
1497 }
1498 }
1499 /* otherwise fall through */
fa9029f8
JB		 1500 default:
1501 /* assign a new address if possible -- try n_addresses first */
1502 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1503 bool used = false;
1504
1505 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1506 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1507 sdata->vif.addr)) {
fa9029f8
JB		 1508 used = true;
1509 break;
1510 }
1511 }
1512
1513 if (!used) {
f142c6b9 1514 memcpy(perm_addr,
fa9029f8
JB		 1515 local->hw.wiphy->addresses[i].addr,
1516 ETH_ALEN);
1517 break;
1518 }
1519 }
1520
1521 /* try mask if available */
1522 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1523 break;
1524
1525 m = local->hw.wiphy->addr_mask;
1526 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1527 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1528 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1529
1530 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1531 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1532 pr_info("not contiguous\n");
fa9029f8
JB		 1533 break;
1534 }
1535
ac20976d
HS		 1536 /*
1537 * Pick address of existing interface in case user changed
1538 * MAC address manually, default to perm_addr.
1539 */
fa9029f8 1540 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1541 list_for_each_entry(sdata, &local->interfaces, list) {
1542 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1543 continue;
1544 m = sdata->vif.addr;
1545 break;
1546 }
fa9029f8
JB		 1547 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1548 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1549 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1550
1551 inc = 1ULL<<__ffs64(mask);
1552 val = (start & mask);
1553 addr = (start & ~mask) | (val & mask);
1554 do {
1555 bool used = false;
1556
1557 tmp_addr[5] = addr >> 0*8;
1558 tmp_addr[4] = addr >> 1*8;
1559 tmp_addr[3] = addr >> 2*8;
1560 tmp_addr[2] = addr >> 3*8;
1561 tmp_addr[1] = addr >> 4*8;
1562 tmp_addr[0] = addr >> 5*8;
1563
1564 val += inc;
1565
1566 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1567 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1568 used = true;
1569 break;
1570 }
1571 }
1572
1573 if (!used) {
f142c6b9 1574 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1575 break;
1576 }
1577 addr = (start & ~mask) | (val & mask);
1578 } while (addr != start);
1579
1580 break;
1581 }
1582
6d71117a 1583 out_unlock:
fa9029f8
JB		 1584 mutex_unlock(&local->iflist_mtx);
1585}
1586
3e122be0 1587int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1588 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1589 struct vif_params *params)
f0706e82 1590{
f142c6b9 1591 struct net_device *ndev = NULL;
f0706e82 1592 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1593 int ret, i;
ded81f6b 1594 int txqs = 1;
f0706e82
JB		 1595
1596 ASSERT_RTNL();
75636525 1597
f142c6b9
JB		 1598 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1599 struct wireless_dev *wdev;
1600
1601 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1602 GFP_KERNEL);
1603 if (!sdata)
1604 return -ENOMEM;
1605 wdev = &sdata->wdev;
1606
1607 sdata->dev = NULL;
1608 strlcpy(sdata->name, name, IFNAMSIZ);
1609 ieee80211_assign_perm_addr(local, wdev->address, type);
1610 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1611 } else {
1612 if (local->hw.queues >= IEEE80211_NUM_ACS)
1613 txqs = IEEE80211_NUM_ACS;
1614
1615 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1616 local->hw.vif_data_size,
1617 name, ieee80211_if_setup, txqs, 1);
1618 if (!ndev)
1619 return -ENOMEM;
1620 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1621
1622 ndev->needed_headroom = local->tx_headroom +
1623 4*6 /* four MAC addresses */
1624 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1625 + 6 /* mesh */
1626 + 8 /* rfc1042/bridge tunnel */
1627 - ETH_HLEN /* ethernet hard_header_len */
1628 + IEEE80211_ENCRYPT_HEADROOM;
1629 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1630
1631 ret = dev_alloc_name(ndev, ndev->name);
1632 if (ret < 0) {
1633 free_netdev(ndev);
1634 return ret;
1635 }
1636
1637 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1638 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1639 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1640
1641 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1642 sdata = netdev_priv(ndev);
1643 ndev->ieee80211_ptr = &sdata->wdev;
1644 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1645 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1646
1647 sdata->dev = ndev;
1648 }
75636525
JB		 1649
1650 /* initialise type-independent data */
f0706e82 1651 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1652 sdata->local = local;
75636525
JB		 1653
1654 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1655 skb_queue_head_init(&sdata->fragments[i].skb_list);
1656
1657 INIT_LIST_HEAD(&sdata->key_list);
1658
164eb02d
SW		 1659 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1660 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1661 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1662 ieee80211_delayed_tailroom_dec);
97f97b1f 1663
37eb0b16
JM		 1664 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1665 struct ieee80211_supported_band *sband;
1666 sband = local->hw.wiphy->bands[i];
1667 sdata->rc_rateidx_mask[i] =
1668 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1669 if (sband)
1670 memcpy(sdata->rc_rateidx_mcs_mask[i],
1671 sband->ht_cap.mcs.rx_mask,
1672 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1673 else
1674 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1675 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1676 }
75636525 1677
3a25a8c8
JB		 1678 ieee80211_set_default_queues(sdata);
1679
1ea6f9c0
JB		 1680 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1681 sdata->user_power_level = local->user_power_level;
1682
2475b1cc
MS		 1683 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1684
75636525
JB		 1685 /* setup type-dependent data */
1686 ieee80211_setup_sdata(sdata, type);
f0706e82 1687
f142c6b9
JB		 1688 if (ndev) {
1689 if (params) {
1690 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1691 if (type == NL80211_IFTYPE_STATION)
1692 sdata->u.mgd.use_4addr = params->use_4addr;
1693 }
9bc383de 1694
f142c6b9 1695 ndev->features |= local->hw.netdev_features;
72d78728 1696
f142c6b9
JB		 1697 ret = register_netdevice(ndev);
1698 if (ret) {
1699 free_netdev(ndev);
1700 return ret;
1701 }
1702 }
f0706e82 1703
c771c9d8 1704 mutex_lock(&local->iflist_mtx);
79010420 1705 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1706 mutex_unlock(&local->iflist_mtx);
79010420 1707
84efbb84
JB		 1708 if (new_wdev)
1709 *new_wdev = &sdata->wdev;
f0706e82 1710
f0706e82 1711 return 0;
f0706e82
JB		 1712}
1713
f698d856 1714void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1715{
f0706e82 1716 ASSERT_RTNL();
11a843b7 1717
c771c9d8 1718 mutex_lock(&sdata->local->iflist_mtx);
75636525 1719 list_del_rcu(&sdata->list);
c771c9d8
JB		 1720 mutex_unlock(&sdata->local->iflist_mtx);
1721
75636525 1722 synchronize_rcu();
f142c6b9
JB		 1723
1724 if (sdata->dev) {
1725 unregister_netdevice(sdata->dev);
1726 } else {
1727 cfg80211_unregister_wdev(&sdata->wdev);
1728 kfree(sdata);
1729 }
1730}
1731
1732void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1733{
1734 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1735 return;
1736 ieee80211_do_stop(sdata, true);
1737 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1738}
1739
75636525
JB		 1740/*
1741 * Remove all interfaces, may only be called at hardware unregistration
1742 * time because it doesn't do RCU-safe list removals.
1743 */
1744void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1745{
75636525 1746 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1747 LIST_HEAD(unreg_list);
f142c6b9 1748 LIST_HEAD(wdev_list);
f0706e82
JB		 1749
1750 ASSERT_RTNL();
1751
c8aa22db
JB		 1752 /*
1753 * Close all AP_VLAN interfaces first, as otherwise they
1754 * might be closed while the AP interface they belong to
1755 * is closed, causing unregister_netdevice_many() to crash.
1756 */
1757 list_for_each_entry(sdata, &local->interfaces, list)
1758 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1759 dev_close(sdata->dev);
1760
efe117ab 1761 mutex_lock(&local->iflist_mtx);
75636525
JB		 1762 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1763 list_del(&sdata->list);
c771c9d8 1764
f142c6b9
JB		 1765 if (sdata->dev)
1766 unregister_netdevice_queue(sdata->dev, &unreg_list);
1767 else
1768 list_add(&sdata->list, &wdev_list);
f0706e82 1769 }
efe117ab
ED		 1770 mutex_unlock(&local->iflist_mtx);
1771 unregister_netdevice_many(&unreg_list);
5f04d506 1772 list_del(&unreg_list);
f142c6b9
JB		 1773
1774 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1775 list_del(&sdata->list);
1776 cfg80211_unregister_wdev(&sdata->wdev);
1777 kfree(sdata);
1778 }
f0706e82 1779}
5cff20e6 1780
47846c9b 1781static int netdev_notify(struct notifier_block *nb,
351638e7 1782 unsigned long state, void *ptr)
47846c9b 1783{
351638e7 1784 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1785 struct ieee80211_sub_if_data *sdata;
1786
1787 if (state != NETDEV_CHANGENAME)
1788 return 0;
1789
1790 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1791 return 0;
1792
1793 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1794 return 0;
1795
1796 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1797
2f5265e6 1798 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1799
1800 ieee80211_debugfs_rename_netdev(sdata);
1801 return 0;
1802}
1803
1804static struct notifier_block mac80211_netdev_notifier = {
1805 .notifier_call = netdev_notify,
1806};
1807
1808int ieee80211_iface_init(void)
1809{
1810 return register_netdevice_notifier(&mac80211_netdev_notifier);
1811}
1812
1813void ieee80211_iface_exit(void)
1814{
1815 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1816}
Michael's Linux tree.