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mac80211: clear subdir_stations when removing debugfs
[GitHub/mt8127/android_kernel_alcatel_ttab.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
4bf88530 57 power = chanctx_conf->def.chan->max_power;
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{
fd0f979a 104 bool working = false, scanning, active;
cc45ae54
JB		 105 unsigned int led_trig_start = 0, led_trig_stop = 0;
106 struct ieee80211_roc_work *roc;
107
cc45ae54
JB		 108 lockdep_assert_held(&local->mtx);
109
62a40a15
JB		 110 active = force_active ||
111 !list_empty(&local->chanctx_list) ||
112 local->monitors;
cc45ae54
JB		 113
114 if (!local->ops->remain_on_channel) {
115 list_for_each_entry(roc, &local->roc_list, list) {
116 working = true;
fd0f979a 117 break;
cc45ae54
JB		 118 }
119 }
120
f1e3e051
JB		 121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 123
cc45ae54
JB		 124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 else
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128
fd0f979a 129 if (active)
cc45ae54
JB		 130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 else
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135
fd0f979a 136 if (working || scanning || active)
62a40a15
JB		 137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
139}
140
141u32 ieee80211_idle_off(struct ieee80211_local *local)
142{
143 return __ieee80211_recalc_idle(local, true);
144}
145
146void ieee80211_recalc_idle(struct ieee80211_local *local)
147{
148 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 149 if (change)
150 ieee80211_hw_config(local, change);
cc45ae54
JB		 151}
152
0d143fe1
JB		 153static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
154{
09b1426e 155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 156 return -EINVAL;
0d143fe1 157
0d143fe1
JB		 158 dev->mtu = new_mtu;
159 return 0;
160}
161
ac20976d 162static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr)
478622e8 163{
ac20976d
HS		 164 struct ieee80211_local *local = sdata->local;
165 struct ieee80211_sub_if_data *iter;
478622e8
HS		 166 u64 new, mask, tmp;
167 u8 *m;
168 int ret = 0;
169
170 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
171 return 0;
172
173 m = addr;
174 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
175 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
176 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
177
178 m = local->hw.wiphy->addr_mask;
179 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
180 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
181 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
182
183
184 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 185 list_for_each_entry(iter, &local->interfaces, list) {
186 if (iter == sdata)
478622e8
HS		 187 continue;
188
ac20976d
HS		 189 if (iter->vif.type == NL80211_IFTYPE_MONITOR)
190 continue;
191
192 m = iter->vif.addr;
478622e8
HS		 193 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
194 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
195 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
196
197 if ((new & ~mask) != (tmp & ~mask)) {
198 ret = -EINVAL;
199 break;
200 }
201 }
202 mutex_unlock(&local->iflist_mtx);
203
204 return ret;
205}
206
47846c9b
JB		 207static int ieee80211_change_mac(struct net_device *dev, void *addr)
208{
209 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 210 struct sockaddr *sa = addr;
47846c9b
JB		 211 int ret;
212
9607e6b6 213 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 214 return -EBUSY;
215
ac20976d 216 ret = ieee80211_verify_mac(sdata, sa->sa_data);
478622e8
HS		 217 if (ret)
218 return ret;
219
fc5f7577 220 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 221
222 if (ret == 0)
fc5f7577 223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 224
225 return ret;
226}
227
0d143fe1
JB		 228static inline int identical_mac_addr_allowed(int type1, int type2)
229{
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
235 (type1 == NL80211_IFTYPE_WDS &&
236 (type2 == NL80211_IFTYPE_WDS ||
237 type2 == NL80211_IFTYPE_AP)) ||
238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
239 (type1 == NL80211_IFTYPE_AP_VLAN &&
240 (type2 == NL80211_IFTYPE_AP ||
241 type2 == NL80211_IFTYPE_AP_VLAN));
242}
243
87490f6d
JB		 244static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
245 enum nl80211_iftype iftype)
0d143fe1 246{
b4a4bf5d 247 struct ieee80211_local *local = sdata->local;
87490f6d 248 struct ieee80211_sub_if_data *nsdata;
0d143fe1 249
87490f6d 250 ASSERT_RTNL();
0d143fe1
JB		 251
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 255 /*
256 * Allow only a single IBSS interface to be up at any
257 * time. This is restricted because beacon distribution
258 * cannot work properly if both are in the same IBSS.
259 *
260 * To remove this restriction we'd have to disallow them
261 * from setting the same SSID on different IBSS interfaces
262 * belonging to the same hardware. Then, however, we're
263 * faced with having to adopt two different TSF timers...
264 */
87490f6d 265 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 266 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
267 return -EBUSY;
268
269 /*
270 * The remaining checks are only performed for interfaces
271 * with the same MAC address.
272 */
371a255e
JB		 273 if (!ether_addr_equal(sdata->vif.addr,
274 nsdata->vif.addr))
0d143fe1
JB		 275 continue;
276
277 /*
278 * check whether it may have the same address
279 */
87490f6d 280 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 281 nsdata->vif.type))
282 return -ENOTUNIQ;
283
284 /*
285 * can only add VLANs to enabled APs
286 */
87490f6d 287 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 288 nsdata->vif.type == NL80211_IFTYPE_AP)
289 sdata->bss = &nsdata->u.ap;
290 }
291 }
292
87490f6d
JB		 293 return 0;
294}
295
3a25a8c8
JB		 296static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
297{
298 int n_queues = sdata->local->hw.queues;
299 int i;
300
0ef24e52
IP		 301 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
302 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
303 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
304 IEEE80211_INVAL_HW_QUEUE))
305 return -EINVAL;
306 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
307 n_queues))
308 return -EINVAL;
309 }
3a25a8c8
JB		 310 }
311
8ffb5c00
BC		 312 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
313 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 314 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 315 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
316 return 0;
317 }
318
319 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
320 return -EINVAL;
321
322 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
323 return -EINVAL;
324
325 return 0;
326}
327
85416a4f
CL		 328void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
329 const int offset)
330{
331 struct ieee80211_local *local = sdata->local;
332 u32 flags = sdata->u.mntr_flags;
333
334#define ADJUST(_f, _s) do { \
335 if (flags & MONITOR_FLAG_##_f) \
336 local->fif_##_s += offset; \
337 } while (0)
338
339 ADJUST(FCSFAIL, fcsfail);
340 ADJUST(PLCPFAIL, plcpfail);
341 ADJUST(CONTROL, control);
342 ADJUST(CONTROL, pspoll);
343 ADJUST(OTHER_BSS, other_bss);
344
345#undef ADJUST
346}
347
3a25a8c8
JB		 348static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
349{
350 struct ieee80211_local *local = sdata->local;
351 int i;
352
353 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
354 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
355 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 356 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 357 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 358 else
359 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 360 }
361 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
362}
363
3c3e21e7 364int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 365{
366 struct ieee80211_sub_if_data *sdata;
8b305780 367 int ret;
4b6f1dd6
JB		 368
369 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
370 return 0;
371
8b305780 372 ASSERT_RTNL();
685fb72b 373
4b6f1dd6 374 if (local->monitor_sdata)
8b305780 375 return 0;
4b6f1dd6
JB		 376
377 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 378 if (!sdata)
379 return -ENOMEM;
4b6f1dd6
JB		 380
381 /* set up data */
382 sdata->local = local;
383 sdata->vif.type = NL80211_IFTYPE_MONITOR;
384 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
385 wiphy_name(local->hw.wiphy));
386
3a25a8c8
JB		 387 ieee80211_set_default_queues(sdata);
388
4b6f1dd6
JB		 389 ret = drv_add_interface(local, sdata);
390 if (WARN_ON(ret)) {
391 /* ok .. stupid driver, it asked for this! */
392 kfree(sdata);
8b305780 393 return ret;
4b6f1dd6
JB		 394 }
395
3a25a8c8
JB		 396 ret = ieee80211_check_queues(sdata);
397 if (ret) {
398 kfree(sdata);
8b305780 399 return ret;
3a25a8c8
JB		 400 }
401
4bf88530 402 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 403 IEEE80211_CHANCTX_EXCLUSIVE);
404 if (ret) {
405 drv_remove_interface(local, sdata);
406 kfree(sdata);
8b305780 407 return ret;
55de908a
JB		 408 }
409
8b305780 410 mutex_lock(&local->iflist_mtx);
4b6f1dd6 411 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 412 mutex_unlock(&local->iflist_mtx);
8b305780
JB		 413
414 return 0;
4b6f1dd6
JB		 415}
416
3c3e21e7 417void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 418{
419 struct ieee80211_sub_if_data *sdata;
420
421 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
422 return;
423
8b305780
JB		 424 ASSERT_RTNL();
425
685fb72b 426 mutex_lock(&local->iflist_mtx);
4b6f1dd6 427
685fb72b
JB		 428 sdata = rcu_dereference_protected(local->monitor_sdata,
429 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 430 if (!sdata) {
431 mutex_unlock(&local->iflist_mtx);
432 return;
433 }
4b6f1dd6
JB		 434
435 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB		 436 mutex_unlock(&local->iflist_mtx);
437
4b6f1dd6
JB		 438 synchronize_net();
439
55de908a
JB		 440 ieee80211_vif_release_channel(sdata);
441
4b6f1dd6
JB		 442 drv_remove_interface(local, sdata);
443
444 kfree(sdata);
445}
446
34d4bc4d
JB		 447/*
448 * NOTE: Be very careful when changing this function, it must NOT return
449 * an error on interface type changes that have been pre-checked, so most
450 * checks should be in ieee80211_check_concurrent_iface.
451 */
f142c6b9 452int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 453{
f142c6b9
JB		 454 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
455 struct net_device *dev = wdev->netdev;
87490f6d
JB		 456 struct ieee80211_local *local = sdata->local;
457 struct sta_info *sta;
458 u32 changed = 0;
459 int res;
460 u32 hw_reconf_flags = 0;
461
0d143fe1
JB		 462 switch (sdata->vif.type) {
463 case NL80211_IFTYPE_WDS:
464 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
465 return -ENOLINK;
466 break;
665c93a9
JB		 467 case NL80211_IFTYPE_AP_VLAN: {
468 struct ieee80211_sub_if_data *master;
469
0d143fe1
JB		 470 if (!sdata->bss)
471 return -ENOLINK;
665c93a9 472
0d143fe1 473 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 474
475 master = container_of(sdata->bss,
476 struct ieee80211_sub_if_data, u.ap);
477 sdata->control_port_protocol =
478 master->control_port_protocol;
479 sdata->control_port_no_encrypt =
480 master->control_port_no_encrypt;
1351c5d3
JB		 481 sdata->vif.cab_queue = master->vif.cab_queue;
482 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
483 sizeof(sdata->vif.hw_queue));
0d143fe1 484 break;
665c93a9 485 }
0d143fe1
JB		 486 case NL80211_IFTYPE_AP:
487 sdata->bss = &sdata->u.ap;
488 break;
489 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 490 case NL80211_IFTYPE_STATION:
491 case NL80211_IFTYPE_MONITOR:
492 case NL80211_IFTYPE_ADHOC:
f142c6b9 493 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 494 /* no special treatment */
495 break;
496 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 497 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 498 case NL80211_IFTYPE_P2P_CLIENT:
499 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 500 /* cannot happen */
501 WARN_ON(1);
502 break;
503 }
504
505 if (local->open_count == 0) {
24487981 506 res = drv_start(local);
0d143fe1
JB		 507 if (res)
508 goto err_del_bss;
e8975581
JB		 509 /* we're brought up, everything changes */
510 hw_reconf_flags = ~0;
1f87f7d3 511 ieee80211_led_radio(local, true);
67408c8c
JB		 512 ieee80211_mod_tpt_led_trig(local,
513 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 514 }
515
516 /*
bf533e0b
JB		 517 * Copy the hopefully now-present MAC address to
518 * this interface, if it has the special null one.
0d143fe1 519 */
f142c6b9 520 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 521 memcpy(dev->dev_addr,
522 local->hw.wiphy->perm_addr,
523 ETH_ALEN);
524 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
525
526 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 527 res = -EADDRNOTAVAIL;
528 goto err_stop;
0adc23f5 529 }
0d143fe1
JB		 530 }
531
0d143fe1
JB		 532 switch (sdata->vif.type) {
533 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 534 /* no need to tell driver, but set carrier and chanctx */
535 if (rtnl_dereference(sdata->bss->beacon)) {
536 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 537 netif_carrier_on(dev);
4d76d21b 538 } else {
3edaf3e6 539 netif_carrier_off(dev);
4d76d21b 540 }
0d143fe1
JB		 541 break;
542 case NL80211_IFTYPE_MONITOR:
543 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
544 local->cooked_mntrs++;
545 break;
546 }
547
075e0847
JB		 548 if (local->monitors == 0 && local->open_count == 0) {
549 res = ieee80211_add_virtual_monitor(local);
550 if (res)
551 goto err_stop;
552 }
553
0d143fe1
JB		 554 /* must be before the call to ieee80211_configure_filter */
555 local->monitors++;
e8975581 556 if (local->monitors == 1) {
0869aea0
JB		 557 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
558 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 559 }
0d143fe1 560
85416a4f 561 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 562 ieee80211_configure_filter(local);
801d929c
FF		 563 mutex_lock(&local->mtx);
564 ieee80211_recalc_idle(local);
565 mutex_unlock(&local->mtx);
53e9b1de
DG		 566
567 netif_carrier_on(dev);
0d143fe1 568 break;
0d143fe1 569 default:
34d4bc4d 570 if (coming_up) {
075e0847
JB		 571 ieee80211_del_virtual_monitor(local);
572
7b7eab6f 573 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 574 if (res)
575 goto err_stop;
3a25a8c8
JB		 576 res = ieee80211_check_queues(sdata);
577 if (res)
578 goto err_del_interface;
34d4bc4d 579 }
0d143fe1 580
29cbe68c 581 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 582 local->fif_pspoll++;
7be5086d 583 local->fif_probe_req++;
e3b90ca2 584
e3b90ca2 585 ieee80211_configure_filter(local);
7be5086d
JB		 586 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
587 local->fif_probe_req++;
a3c9aa51 588 }
e3b90ca2 589
f142c6b9
JB		 590 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
591 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 592 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 593
c405c629
JB		 594 switch (sdata->vif.type) {
595 case NL80211_IFTYPE_STATION:
596 case NL80211_IFTYPE_ADHOC:
597 case NL80211_IFTYPE_AP:
598 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 599 netif_carrier_off(dev);
c405c629 600 break;
1411af15 601 case NL80211_IFTYPE_WDS:
f142c6b9 602 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 603 break;
c405c629 604 default:
a2310824
JB		 605 /* not reached */
606 WARN_ON(1);
c405c629 607 }
59034591
EP		 608
609 /*
610 * set default queue parameters so drivers don't
611 * need to initialise the hardware if the hardware
612 * doesn't start up with sane defaults
613 */
3abead59 614 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 615 }
616
2d2080c3
JB		 617 set_bit(SDATA_STATE_RUNNING, &sdata->state);
618
0d143fe1
JB		 619 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
620 /* Create STA entry for the WDS peer */
621 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
622 GFP_KERNEL);
623 if (!sta) {
624 res = -ENOMEM;
625 goto err_del_interface;
626 }
627
83d5cc01
JB		 628 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
629 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
630 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 631
632 res = sta_info_insert(sta);
633 if (res) {
634 /* STA has been freed */
635 goto err_del_interface;
636 }
1be7fe8d
BJ		 637
638 rate_control_rate_init(sta);
1411af15 639 netif_carrier_on(dev);
f142c6b9
JB		 640 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
641 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 642 }
643
0d143fe1
JB		 644 /*
645 * set_multicast_list will be invoked by the networking core
646 * which will check whether any increments here were done in
647 * error and sync them down to the hardware as filter flags.
648 */
649 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
650 atomic_inc(&local->iff_allmultis);
651
652 if (sdata->flags & IEEE80211_SDATA_PROMISC)
653 atomic_inc(&local->iff_promiscs);
654
34d4bc4d
JB		 655 if (coming_up)
656 local->open_count++;
657
59034591 658 if (hw_reconf_flags)
e8975581 659 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 660
10f644a4 661 ieee80211_recalc_ps(local, -1);
965bedad 662
2b436312
JB		 663 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
664 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
665 /* XXX: for AP_VLAN, actually track AP queues */
666 netif_tx_start_all_queues(dev);
667 } else if (dev) {
2b730daa
JB		 668 unsigned long flags;
669 int n_acs = IEEE80211_NUM_ACS;
670 int ac;
671
672 if (local->hw.queues < IEEE80211_NUM_ACS)
673 n_acs = 1;
674
675 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
676 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
677 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
678 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
679 for (ac = 0; ac < n_acs; ac++) {
680 int ac_queue = sdata->vif.hw_queue[ac];
681
682 if (local->queue_stop_reasons[ac_queue] == 0 &&
683 skb_queue_empty(&local->pending[ac_queue]))
684 netif_start_subqueue(dev, ac);
685 }
686 }
687 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
688 }
0d143fe1
JB		 689
690 return 0;
691 err_del_interface:
7b7eab6f 692 drv_remove_interface(local, sdata);
0d143fe1 693 err_stop:
24487981
JB		 694 if (!local->open_count)
695 drv_stop(local);
0d143fe1
JB		 696 err_del_bss:
697 sdata->bss = NULL;
698 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
699 list_del(&sdata->u.vlan.list);
4d6c36fa 700 /* might already be clear but that doesn't matter */
2d2080c3 701 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 702 return res;
703}
704
34d4bc4d 705static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 706{
707 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 708 int err;
709
710 /* fail early if user set an invalid address */
2fcf2824 711 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 712 return -EADDRNOTAVAIL;
713
714 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
715 if (err)
716 return err;
717
f142c6b9 718 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 719}
720
721static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
722 bool going_down)
723{
0d143fe1 724 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 725 unsigned long flags;
726 struct sk_buff *skb, *tmp;
e8975581 727 u32 hw_reconf_flags = 0;
09f4114e 728 int i, flushed;
397a7a24 729 struct ps_data *ps;
0d143fe1 730
c29acf20
RM		 731 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
732
e2fd5dbc 733 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 734 ieee80211_scan_cancel(local);
735
0d143fe1
JB		 736 /*
737 * Stop TX on this interface first.
738 */
f142c6b9
JB		 739 if (sdata->dev)
740 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 741
c8f994ee 742 ieee80211_roc_purge(local, sdata);
af6b6374 743
572078be
JB		 744 if (sdata->vif.type == NL80211_IFTYPE_STATION)
745 ieee80211_mgd_stop(sdata);
746
0d143fe1
JB		 747 /*
748 * Remove all stations associated with this interface.
749 *
750 * This must be done before calling ops->remove_interface()
751 * because otherwise we can later invoke ops->sta_notify()
752 * whenever the STAs are removed, and that invalidates driver
753 * assumptions about always getting a vif pointer that is valid
754 * (because if we remove a STA after ops->remove_interface()
755 * the driver will have removed the vif info already!)
756 *
09f4114e
JB		 757 * This is relevant only in WDS mode, in all other modes we've
758 * already removed all stations when disconnecting or similar,
759 * so warn otherwise.
051007d9
JB		 760 *
761 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 762 */
051007d9 763 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 764 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
765 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 766
afdc7c18 767 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 768 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
769 atomic_dec(&local->iff_allmultis);
770
771 if (sdata->flags & IEEE80211_SDATA_PROMISC)
772 atomic_dec(&local->iff_promiscs);
773
7be5086d 774 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 775 local->fif_pspoll--;
7be5086d
JB		 776 local->fif_probe_req--;
777 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
778 local->fif_probe_req--;
779 }
e3b90ca2 780
f142c6b9
JB		 781 if (sdata->dev) {
782 netif_addr_lock_bh(sdata->dev);
783 spin_lock_bh(&local->filter_lock);
784 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
785 sdata->dev->addr_len);
786 spin_unlock_bh(&local->filter_lock);
787 netif_addr_unlock_bh(sdata->dev);
f142c6b9 788 }
3ac64bee 789
7cbf0ba5
VN		 790 del_timer_sync(&local->dynamic_ps_timer);
791 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 792
04ecd257
JB		 793 cancel_work_sync(&sdata->recalc_smps);
794
164eb02d
SW		 795 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
796
797 if (sdata->wdev.cac_started) {
b2c0958b 798 WARN_ON(local->suspended);
164eb02d
SW		 799 mutex_lock(&local->iflist_mtx);
800 ieee80211_vif_release_channel(sdata);
801 mutex_unlock(&local->iflist_mtx);
802 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
803 GFP_KERNEL);
804 }
805
0d143fe1
JB		 806 /* APs need special treatment */
807 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 808 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 809
810 /* down all dependent devices, that is VLANs */
57c9fff3 811 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 812 u.vlan.list)
813 dev_close(vlan->dev);
814 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 815 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
816 /* remove all packets in parent bc_buf pointing to this dev */
817 ps = &sdata->bss->ps;
818
819 spin_lock_irqsave(&ps->bc_buf.lock, flags);
820 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
821 if (skb->dev == sdata->dev) {
822 __skb_unlink(skb, &ps->bc_buf);
823 local->total_ps_buffered--;
824 ieee80211_free_txskb(&local->hw, skb);
825 }
826 }
827 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 828 }
829
34d4bc4d
JB		 830 if (going_down)
831 local->open_count--;
0d143fe1
JB		 832
833 switch (sdata->vif.type) {
834 case NL80211_IFTYPE_AP_VLAN:
835 list_del(&sdata->u.vlan.list);
4d76d21b 836 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 837 /* no need to tell driver */
838 break;
839 case NL80211_IFTYPE_MONITOR:
840 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
841 local->cooked_mntrs--;
842 break;
843 }
844
845 local->monitors--;
e8975581 846 if (local->monitors == 0) {
0869aea0
JB		 847 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
848 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 849 }
0d143fe1 850
85416a4f 851 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 852 break;
f142c6b9
JB		 853 case NL80211_IFTYPE_P2P_DEVICE:
854 /* relies on synchronize_rcu() below */
855 rcu_assign_pointer(local->p2p_sdata, NULL);
856 /* fall through */
0d143fe1 857 default:
0b7dff4f 858 cancel_work_sync(&sdata->work);
35f20c14
JB		 859 /*
860 * When we get here, the interface is marked down.
75de9113
JB		 861 *
862 * sta_info_flush_cleanup() requires rcu_barrier()
863 * first to wait for the station call_rcu() calls
8ceb5955
BC		 864 * to complete, and we also need synchronize_rcu()
865 * to wait for the RX path in case it is using the
75de9113
JB		 866 * interface and enqueuing frames at this very time on
867 * another CPU.
35f20c14 868 */
8ceb5955 869 synchronize_rcu();
75de9113 870 rcu_barrier();
051007d9
JB		 871 sta_info_flush_cleanup(sdata);
872
b9dcf712
JB		 873 /*
874 * Free all remaining keys, there shouldn't be any,
7b4396bd 875 * except maybe in WDS mode?
b9dcf712 876 */
ad0e2b5a 877 ieee80211_free_keys(sdata);
b9dcf712 878
1861b845
JB		 879 /* fall through */
880 case NL80211_IFTYPE_AP:
881 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 882 }
883
884 sdata->bss = NULL;
885
5061b0c2
JB		 886 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
887 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
888 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
889 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
890 if (info->control.vif == &sdata->vif) {
891 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 892 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 893 }
894 }
895 }
896 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 897
b2c0958b
JB		 898 if (local->open_count == 0)
899 ieee80211_clear_tx_pending(local);
900
901 /*
902 * If the interface goes down while suspended, presumably because
903 * the device was unplugged and that happens before our resume,
904 * then the driver is already unconfigured and the remainder of
905 * this function isn't needed.
906 * XXX: what about WoWLAN? If the device has software state, e.g.
907 * memory allocated, it might expect teardown commands from
908 * mac80211 here?
909 */
910 if (local->suspended) {
911 WARN_ON(local->wowlan);
912 WARN_ON(rtnl_dereference(local->monitor_sdata));
913 return;
914 }
915
916 switch (sdata->vif.type) {
917 case NL80211_IFTYPE_AP_VLAN:
918 break;
919 case NL80211_IFTYPE_MONITOR:
920 if (local->monitors == 0)
921 ieee80211_del_virtual_monitor(local);
922
923 mutex_lock(&local->mtx);
924 ieee80211_recalc_idle(local);
925 mutex_unlock(&local->mtx);
926 break;
927 default:
928 if (going_down)
929 drv_remove_interface(local, sdata);
930 }
931
932 ieee80211_recalc_ps(local, -1);
933
934 if (local->open_count == 0) {
935 ieee80211_stop_device(local);
936
937 /* no reconfiguring after stop! */
938 return;
939 }
940
941 /* do after stop to avoid reconfiguring when we stop anyway */
942 ieee80211_configure_filter(local);
943 ieee80211_hw_config(local, hw_reconf_flags);
944
945 if (local->monitors == local->open_count)
075e0847 946 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 947}
948
949static int ieee80211_stop(struct net_device *dev)
950{
951 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
952
953 ieee80211_do_stop(sdata, true);
5061b0c2 954
0d143fe1
JB		 955 return 0;
956}
957
958static void ieee80211_set_multicast_list(struct net_device *dev)
959{
0d143fe1 960 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 961 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 962 int allmulti, promisc, sdata_allmulti, sdata_promisc;
963
964 allmulti = !!(dev->flags & IFF_ALLMULTI);
965 promisc = !!(dev->flags & IFF_PROMISC);
966 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
967 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
968
969 if (allmulti != sdata_allmulti) {
970 if (dev->flags & IFF_ALLMULTI)
971 atomic_inc(&local->iff_allmultis);
972 else
973 atomic_dec(&local->iff_allmultis);
974 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
975 }
976
977 if (promisc != sdata_promisc) {
978 if (dev->flags & IFF_PROMISC)
979 atomic_inc(&local->iff_promiscs);
980 else
981 atomic_dec(&local->iff_promiscs);
982 sdata->flags ^= IEEE80211_SDATA_PROMISC;
983 }
488b366a
AB		 984
985 /*
986 * TODO: If somebody needs this on AP interfaces,
987 * it can be enabled easily but multicast
988 * addresses from VLANs need to be synced.
989 */
990 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
991 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
992 sdata->vif.type != NL80211_IFTYPE_AP)
993 drv_set_multicast_list(local, sdata, &dev->mc);
994
3b8d81e0 995 spin_lock_bh(&local->filter_lock);
22bedad3 996 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 997 spin_unlock_bh(&local->filter_lock);
3ac64bee 998 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 999}
1000
75636525
JB		 1001/*
1002 * Called when the netdev is removed or, by the code below, before
1003 * the interface type changes.
1004 */
f142c6b9 1005static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1006{
75636525 1007 int flushed;
f0706e82
JB		 1008 int i;
1009
75636525
JB		 1010 /* free extra data */
1011 ieee80211_free_keys(sdata);
1012
aee14ceb
JM		 1013 ieee80211_debugfs_remove_netdev(sdata);
1014
f0706e82 1015 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1016 __skb_queue_purge(&sdata->fragments[i].skb_list);
1017 sdata->fragment_next = 0;
11a843b7 1018
b9dcf712
JB		 1019 if (ieee80211_vif_is_mesh(&sdata->vif))
1020 mesh_rmc_free(sdata);
75636525 1021
b998e8bb 1022 flushed = sta_info_flush(sdata);
75636525 1023 WARN_ON(flushed);
f0706e82
JB		 1024}
1025
f142c6b9
JB		 1026static void ieee80211_uninit(struct net_device *dev)
1027{
1028 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1029}
1030
cf0277e7
JB		 1031static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1032 struct sk_buff *skb)
1033{
1034 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1035}
1036
587e729e
JB		 1037static const struct net_device_ops ieee80211_dataif_ops = {
1038 .ndo_open = ieee80211_open,
1039 .ndo_stop = ieee80211_stop,
f142c6b9 1040 .ndo_uninit = ieee80211_uninit,
587e729e 1041 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1042 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1043 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1044 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1045 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1046};
1047
cf0277e7
JB		 1048static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1049 struct sk_buff *skb)
1050{
1051 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1052 struct ieee80211_local *local = sdata->local;
1053 struct ieee80211_hdr *hdr;
1054 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1055
32c5057b 1056 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1057 return 0;
1058
1059 if (skb->len < 4 ||
b49bb574 1060 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1061 return 0; /* doesn't matter, frame will be dropped */
1062
b49bb574 1063 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1064
00e96dec 1065 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1066}
1067
587e729e
JB		 1068static const struct net_device_ops ieee80211_monitorif_ops = {
1069 .ndo_open = ieee80211_open,
1070 .ndo_stop = ieee80211_stop,
f142c6b9 1071 .ndo_uninit = ieee80211_uninit,
587e729e 1072 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1073 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e
JB		 1074 .ndo_change_mtu = ieee80211_change_mtu,
1075 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 1076 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1077};
1078
1079static void ieee80211_if_setup(struct net_device *dev)
1080{
1081 ether_setup(dev);
550fd08c 1082 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1083 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1084 dev->destructor = free_netdev;
1085}
1086
1fa57d01
JB		 1087static void ieee80211_iface_work(struct work_struct *work)
1088{
1089 struct ieee80211_sub_if_data *sdata =
1090 container_of(work, struct ieee80211_sub_if_data, work);
1091 struct ieee80211_local *local = sdata->local;
1092 struct sk_buff *skb;
344eec67 1093 struct sta_info *sta;
c1475ca9 1094 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1095
1096 if (!ieee80211_sdata_running(sdata))
1097 return;
1098
1099 if (local->scanning)
1100 return;
1101
1102 /*
1103 * ieee80211_queue_work() should have picked up most cases,
1104 * here we'll pick the rest.
1105 */
1106 if (WARN(local->suspended,
1107 "interface work scheduled while going to suspend\n"))
1108 return;
1109
1110 /* first process frames */
1111 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1112 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1113
c1475ca9
JB		 1114 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1115 ra_tid = (void *)&skb->cb;
1116 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1117 ra_tid->tid);
1118 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1119 ra_tid = (void *)&skb->cb;
1120 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1121 ra_tid->tid);
1122 } else if (ieee80211_is_action(mgmt->frame_control) &&
1123 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1124 int len = skb->len;
bed7ee6e 1125
a93e3644 1126 mutex_lock(&local->sta_mtx);
875ae5f6 1127 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1128 if (sta) {
1129 switch (mgmt->u.action.u.addba_req.action_code) {
1130 case WLAN_ACTION_ADDBA_REQ:
1131 ieee80211_process_addba_request(
1132 local, sta, mgmt, len);
1133 break;
1134 case WLAN_ACTION_ADDBA_RESP:
1135 ieee80211_process_addba_resp(local, sta,
1136 mgmt, len);
1137 break;
1138 case WLAN_ACTION_DELBA:
1139 ieee80211_process_delba(sdata, sta,
1140 mgmt, len);
1141 break;
1142 default:
1143 WARN_ON(1);
1144 break;
1145 }
1146 }
a93e3644 1147 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1148 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1149 struct ieee80211_hdr *hdr = (void *)mgmt;
1150 /*
1151 * So the frame isn't mgmt, but frame_control
1152 * is at the right place anyway, of course, so
1153 * the if statement is correct.
1154 *
1155 * Warn if we have other data frame types here,
1156 * they must not get here.
1157 */
1158 WARN_ON(hdr->frame_control &
1159 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1160 WARN_ON(!(hdr->seq_ctrl &
1161 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1162 /*
1163 * This was a fragment of a frame, received while
1164 * a block-ack session was active. That cannot be
1165 * right, so terminate the session.
1166 */
a93e3644 1167 mutex_lock(&local->sta_mtx);
875ae5f6 1168 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1169 if (sta) {
1170 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1171 IEEE80211_QOS_CTL_TID_MASK;
1172
1173 __ieee80211_stop_rx_ba_session(
1174 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1175 WLAN_REASON_QSTA_REQUIRE_SETUP,
1176 true);
344eec67 1177 }
a93e3644 1178 mutex_unlock(&local->sta_mtx);
bed7ee6e 1179 } else switch (sdata->vif.type) {
1fa57d01
JB		 1180 case NL80211_IFTYPE_STATION:
1181 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1182 break;
1183 case NL80211_IFTYPE_ADHOC:
1184 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1185 break;
1186 case NL80211_IFTYPE_MESH_POINT:
1187 if (!ieee80211_vif_is_mesh(&sdata->vif))
1188 break;
1189 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1190 break;
1191 default:
1192 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1193 break;
1194 }
36b3a628
JB		 1195
1196 kfree_skb(skb);
1fa57d01
JB		 1197 }
1198
1199 /* then other type-dependent work */
1200 switch (sdata->vif.type) {
1201 case NL80211_IFTYPE_STATION:
1202 ieee80211_sta_work(sdata);
1203 break;
1204 case NL80211_IFTYPE_ADHOC:
1205 ieee80211_ibss_work(sdata);
1206 break;
1207 case NL80211_IFTYPE_MESH_POINT:
1208 if (!ieee80211_vif_is_mesh(&sdata->vif))
1209 break;
1210 ieee80211_mesh_work(sdata);
1211 break;
1212 default:
1213 break;
1214 }
1215}
1216
04ecd257
JB		 1217static void ieee80211_recalc_smps_work(struct work_struct *work)
1218{
1219 struct ieee80211_sub_if_data *sdata =
1220 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1221
1222 ieee80211_recalc_smps(sdata);
1223}
1fa57d01 1224
75636525
JB		 1225/*
1226 * Helper function to initialise an interface to a specific type.
1227 */
1228static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1229 enum nl80211_iftype type)
f0706e82 1230{
75636525
JB		 1231 /* clear type-dependent union */
1232 memset(&sdata->u, 0, sizeof(sdata->u));
1233
1234 /* and set some type-dependent values */
1235 sdata->vif.type = type;
2ca27bcf 1236 sdata->vif.p2p = false;
60719ffd 1237 sdata->wdev.iftype = type;
75636525 1238
a621fa4d
JB		 1239 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1240 sdata->control_port_no_encrypt = false;
1241
b53be792
SW		 1242 sdata->noack_map = 0;
1243
f142c6b9
JB		 1244 /* only monitor/p2p-device differ */
1245 if (sdata->dev) {
1246 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1247 sdata->dev->type = ARPHRD_ETHER;
1248 }
75636525 1249
35f20c14 1250 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1251 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1252 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
35f20c14 1253
75636525 1254 switch (type) {
2ca27bcf
JB		 1255 case NL80211_IFTYPE_P2P_GO:
1256 type = NL80211_IFTYPE_AP;
1257 sdata->vif.type = type;
1258 sdata->vif.p2p = true;
1259 /* fall through */
05c914fe 1260 case NL80211_IFTYPE_AP:
d012a605 1261 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1262 INIT_LIST_HEAD(&sdata->u.ap.vlans);
ad2d223a 1263 sdata->vif.bss_conf.bssid = sdata->vif.addr;
75636525 1264 break;
2ca27bcf
JB		 1265 case NL80211_IFTYPE_P2P_CLIENT:
1266 type = NL80211_IFTYPE_STATION;
1267 sdata->vif.type = type;
1268 sdata->vif.p2p = true;
1269 /* fall through */
05c914fe 1270 case NL80211_IFTYPE_STATION:
ad2d223a 1271 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1272 ieee80211_sta_setup_sdata(sdata);
472dbc45 1273 break;
46900298 1274 case NL80211_IFTYPE_ADHOC:
ad2d223a 1275 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1276 ieee80211_ibss_setup_sdata(sdata);
1277 break;
05c914fe 1278 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1279 if (ieee80211_vif_is_mesh(&sdata->vif))
1280 ieee80211_mesh_init_sdata(sdata);
1281 break;
05c914fe 1282 case NL80211_IFTYPE_MONITOR:
75636525 1283 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1284 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1285 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1286 MONITOR_FLAG_OTHER_BSS;
1287 break;
05c914fe 1288 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1289 sdata->vif.bss_conf.bssid = NULL;
1290 break;
05c914fe 1291 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1292 break;
98104fde 1293 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1294 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1295 break;
05c914fe 1296 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1297 case NUM_NL80211_IFTYPES:
75636525
JB		 1298 BUG();
1299 break;
1300 }
1301
1302 ieee80211_debugfs_add_netdev(sdata);
1303}
1304
34d4bc4d
JB		 1305static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1306 enum nl80211_iftype type)
1307{
1308 struct ieee80211_local *local = sdata->local;
1309 int ret, err;
2ca27bcf
JB		 1310 enum nl80211_iftype internal_type = type;
1311 bool p2p = false;
34d4bc4d
JB		 1312
1313 ASSERT_RTNL();
1314
1315 if (!local->ops->change_interface)
1316 return -EBUSY;
1317
1318 switch (sdata->vif.type) {
1319 case NL80211_IFTYPE_AP:
1320 case NL80211_IFTYPE_STATION:
1321 case NL80211_IFTYPE_ADHOC:
1322 /*
1323 * Could maybe also all others here?
1324 * Just not sure how that interacts
1325 * with the RX/config path e.g. for
1326 * mesh.
1327 */
1328 break;
1329 default:
1330 return -EBUSY;
1331 }
1332
1333 switch (type) {
1334 case NL80211_IFTYPE_AP:
1335 case NL80211_IFTYPE_STATION:
1336 case NL80211_IFTYPE_ADHOC:
1337 /*
1338 * Could probably support everything
1339 * but WDS here (WDS do_open can fail
1340 * under memory pressure, which this
1341 * code isn't prepared to handle).
1342 */
1343 break;
2ca27bcf
JB		 1344 case NL80211_IFTYPE_P2P_CLIENT:
1345 p2p = true;
1346 internal_type = NL80211_IFTYPE_STATION;
1347 break;
1348 case NL80211_IFTYPE_P2P_GO:
1349 p2p = true;
1350 internal_type = NL80211_IFTYPE_AP;
1351 break;
34d4bc4d
JB		 1352 default:
1353 return -EBUSY;
1354 }
1355
2ca27bcf 1356 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1357 if (ret)
1358 return ret;
1359
1360 ieee80211_do_stop(sdata, false);
1361
f142c6b9 1362 ieee80211_teardown_sdata(sdata);
34d4bc4d 1363
2ca27bcf 1364 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB		 1365 if (ret)
1366 type = sdata->vif.type;
1367
3a25a8c8
JB		 1368 /*
1369 * Ignore return value here, there's not much we can do since
1370 * the driver changed the interface type internally already.
1371 * The warnings will hopefully make driver authors fix it :-)
1372 */
1373 ieee80211_check_queues(sdata);
1374
34d4bc4d
JB		 1375 ieee80211_setup_sdata(sdata, type);
1376
f142c6b9 1377 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1378 WARN(err, "type change: do_open returned %d", err);
1379
1380 return ret;
1381}
1382
f3947e2d 1383int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1384 enum nl80211_iftype type)
75636525 1385{
34d4bc4d
JB		 1386 int ret;
1387
f3947e2d
JB		 1388 ASSERT_RTNL();
1389
2ca27bcf 1390 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1391 return 0;
1392
34d4bc4d
JB		 1393 if (ieee80211_sdata_running(sdata)) {
1394 ret = ieee80211_runtime_change_iftype(sdata, type);
1395 if (ret)
1396 return ret;
1397 } else {
1398 /* Purge and reset type-dependent state. */
f142c6b9 1399 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1400 ieee80211_setup_sdata(sdata, type);
1401 }
75636525
JB		 1402
1403 /* reset some values that shouldn't be kept across type changes */
75636525 1404 sdata->drop_unencrypted = 0;
9bc383de
JB		 1405 if (type == NL80211_IFTYPE_STATION)
1406 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1407
1408 return 0;
f0706e82
JB		 1409}
1410
fa9029f8 1411static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1412 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1413{
1414 struct ieee80211_sub_if_data *sdata;
1415 u64 mask, start, addr, val, inc;
1416 u8 *m;
1417 u8 tmp_addr[ETH_ALEN];
1418 int i;
1419
1420 /* default ... something at least */
f142c6b9 1421 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1422
1423 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1424 local->hw.wiphy->n_addresses <= 1)
1425 return;
1426
fa9029f8
JB		 1427 mutex_lock(&local->iflist_mtx);
1428
1429 switch (type) {
1430 case NL80211_IFTYPE_MONITOR:
1431 /* doesn't matter */
1432 break;
1433 case NL80211_IFTYPE_WDS:
1434 case NL80211_IFTYPE_AP_VLAN:
1435 /* match up with an AP interface */
1436 list_for_each_entry(sdata, &local->interfaces, list) {
1437 if (sdata->vif.type != NL80211_IFTYPE_AP)
1438 continue;
f142c6b9 1439 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1440 break;
1441 }
1442 /* keep default if no AP interface present */
1443 break;
6d71117a
JB		 1444 case NL80211_IFTYPE_P2P_CLIENT:
1445 case NL80211_IFTYPE_P2P_GO:
1446 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1447 list_for_each_entry(sdata, &local->interfaces, list) {
1448 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1449 continue;
1450 if (!ieee80211_sdata_running(sdata))
1451 continue;
1452 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1453 goto out_unlock;
1454 }
1455 }
1456 /* otherwise fall through */
fa9029f8
JB		 1457 default:
1458 /* assign a new address if possible -- try n_addresses first */
1459 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1460 bool used = false;
1461
1462 list_for_each_entry(sdata, &local->interfaces, list) {
1463 if (memcmp(local->hw.wiphy->addresses[i].addr,
1464 sdata->vif.addr, ETH_ALEN) == 0) {
1465 used = true;
1466 break;
1467 }
1468 }
1469
1470 if (!used) {
f142c6b9 1471 memcpy(perm_addr,
fa9029f8
JB		 1472 local->hw.wiphy->addresses[i].addr,
1473 ETH_ALEN);
1474 break;
1475 }
1476 }
1477
1478 /* try mask if available */
1479 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1480 break;
1481
1482 m = local->hw.wiphy->addr_mask;
1483 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1484 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1485 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1486
1487 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1488 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1489 pr_info("not contiguous\n");
fa9029f8
JB		 1490 break;
1491 }
1492
ac20976d
HS		 1493 /*
1494 * Pick address of existing interface in case user changed
1495 * MAC address manually, default to perm_addr.
1496 */
fa9029f8 1497 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1498 list_for_each_entry(sdata, &local->interfaces, list) {
1499 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1500 continue;
1501 m = sdata->vif.addr;
1502 break;
1503 }
fa9029f8
JB		 1504 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1505 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1506 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1507
1508 inc = 1ULL<<__ffs64(mask);
1509 val = (start & mask);
1510 addr = (start & ~mask) | (val & mask);
1511 do {
1512 bool used = false;
1513
1514 tmp_addr[5] = addr >> 0*8;
1515 tmp_addr[4] = addr >> 1*8;
1516 tmp_addr[3] = addr >> 2*8;
1517 tmp_addr[2] = addr >> 3*8;
1518 tmp_addr[1] = addr >> 4*8;
1519 tmp_addr[0] = addr >> 5*8;
1520
1521 val += inc;
1522
1523 list_for_each_entry(sdata, &local->interfaces, list) {
1524 if (memcmp(tmp_addr, sdata->vif.addr,
1525 ETH_ALEN) == 0) {
1526 used = true;
1527 break;
1528 }
1529 }
1530
1531 if (!used) {
f142c6b9 1532 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1533 break;
1534 }
1535 addr = (start & ~mask) | (val & mask);
1536 } while (addr != start);
1537
1538 break;
1539 }
1540
6d71117a 1541 out_unlock:
fa9029f8
JB		 1542 mutex_unlock(&local->iflist_mtx);
1543}
1544
97f97b1f
JB		 1545static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1546{
1547 struct ieee80211_sub_if_data *sdata;
1548
1549 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1550
1551 ieee80211_cleanup_sdata_stas(sdata);
1552}
1553
3e122be0 1554int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1555 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1556 struct vif_params *params)
f0706e82 1557{
f142c6b9 1558 struct net_device *ndev = NULL;
f0706e82 1559 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1560 int ret, i;
ded81f6b 1561 int txqs = 1;
f0706e82
JB		 1562
1563 ASSERT_RTNL();
75636525 1564
f142c6b9
JB		 1565 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1566 struct wireless_dev *wdev;
1567
1568 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1569 GFP_KERNEL);
1570 if (!sdata)
1571 return -ENOMEM;
1572 wdev = &sdata->wdev;
1573
1574 sdata->dev = NULL;
1575 strlcpy(sdata->name, name, IFNAMSIZ);
1576 ieee80211_assign_perm_addr(local, wdev->address, type);
1577 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1578 } else {
1579 if (local->hw.queues >= IEEE80211_NUM_ACS)
1580 txqs = IEEE80211_NUM_ACS;
1581
1582 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1583 local->hw.vif_data_size,
1584 name, ieee80211_if_setup, txqs, 1);
1585 if (!ndev)
1586 return -ENOMEM;
1587 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1588
1589 ndev->needed_headroom = local->tx_headroom +
1590 4*6 /* four MAC addresses */
1591 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1592 + 6 /* mesh */
1593 + 8 /* rfc1042/bridge tunnel */
1594 - ETH_HLEN /* ethernet hard_header_len */
1595 + IEEE80211_ENCRYPT_HEADROOM;
1596 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1597
1598 ret = dev_alloc_name(ndev, ndev->name);
1599 if (ret < 0) {
1600 free_netdev(ndev);
1601 return ret;
1602 }
1603
1604 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1605 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1606 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1607
1608 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1609 sdata = netdev_priv(ndev);
1610 ndev->ieee80211_ptr = &sdata->wdev;
1611 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1612 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1613
1614 sdata->dev = ndev;
1615 }
75636525
JB		 1616
1617 /* initialise type-independent data */
f0706e82 1618 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1619 sdata->local = local;
75636525
JB		 1620
1621 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1622 skb_queue_head_init(&sdata->fragments[i].skb_list);
1623
1624 INIT_LIST_HEAD(&sdata->key_list);
1625
97f97b1f
JB		 1626 spin_lock_init(&sdata->cleanup_stations_lock);
1627 INIT_LIST_HEAD(&sdata->cleanup_stations);
1628 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1629 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1630 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1631 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1632 ieee80211_delayed_tailroom_dec);
97f97b1f 1633
37eb0b16
JM		 1634 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1635 struct ieee80211_supported_band *sband;
1636 sband = local->hw.wiphy->bands[i];
1637 sdata->rc_rateidx_mask[i] =
1638 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1639 if (sband)
1640 memcpy(sdata->rc_rateidx_mcs_mask[i],
1641 sband->ht_cap.mcs.rx_mask,
1642 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1643 else
1644 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1645 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1646 }
75636525 1647
3a25a8c8
JB		 1648 ieee80211_set_default_queues(sdata);
1649
1ea6f9c0
JB		 1650 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1651 sdata->user_power_level = local->user_power_level;
1652
75636525
JB		 1653 /* setup type-dependent data */
1654 ieee80211_setup_sdata(sdata, type);
f0706e82 1655
f142c6b9
JB		 1656 if (ndev) {
1657 if (params) {
1658 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1659 if (type == NL80211_IFTYPE_STATION)
1660 sdata->u.mgd.use_4addr = params->use_4addr;
1661 }
9bc383de 1662
f142c6b9 1663 ndev->features |= local->hw.netdev_features;
72d78728 1664
f142c6b9
JB		 1665 ret = register_netdevice(ndev);
1666 if (ret) {
1667 free_netdev(ndev);
1668 return ret;
1669 }
1670 }
f0706e82 1671
c771c9d8 1672 mutex_lock(&local->iflist_mtx);
79010420 1673 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1674 mutex_unlock(&local->iflist_mtx);
79010420 1675
84efbb84
JB		 1676 if (new_wdev)
1677 *new_wdev = &sdata->wdev;
f0706e82 1678
f0706e82 1679 return 0;
f0706e82
JB		 1680}
1681
f698d856 1682void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1683{
f0706e82 1684 ASSERT_RTNL();
11a843b7 1685
c771c9d8 1686 mutex_lock(&sdata->local->iflist_mtx);
75636525 1687 list_del_rcu(&sdata->list);
c771c9d8
JB		 1688 mutex_unlock(&sdata->local->iflist_mtx);
1689
75636525 1690 synchronize_rcu();
f142c6b9
JB		 1691
1692 if (sdata->dev) {
1693 unregister_netdevice(sdata->dev);
1694 } else {
1695 cfg80211_unregister_wdev(&sdata->wdev);
1696 kfree(sdata);
1697 }
1698}
1699
1700void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1701{
1702 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1703 return;
1704 ieee80211_do_stop(sdata, true);
1705 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1706}
1707
75636525
JB		 1708/*
1709 * Remove all interfaces, may only be called at hardware unregistration
1710 * time because it doesn't do RCU-safe list removals.
1711 */
1712void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1713{
75636525 1714 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1715 LIST_HEAD(unreg_list);
f142c6b9 1716 LIST_HEAD(wdev_list);
f0706e82
JB		 1717
1718 ASSERT_RTNL();
1719
bcaef288
JB		 1720 /*
1721 * Close all AP_VLAN interfaces first, as otherwise they
1722 * might be closed while the AP interface they belong to
1723 * is closed, causing unregister_netdevice_many() to crash.
1724 */
1725 list_for_each_entry(sdata, &local->interfaces, list)
1726 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1727 dev_close(sdata->dev);
1728
c8aa22db
JB		 1729 /*
1730 * Close all AP_VLAN interfaces first, as otherwise they
1731 * might be closed while the AP interface they belong to
1732 * is closed, causing unregister_netdevice_many() to crash.
1733 */
1734 list_for_each_entry(sdata, &local->interfaces, list)
1735 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1736 dev_close(sdata->dev);
1737
efe117ab 1738 mutex_lock(&local->iflist_mtx);
75636525
JB		 1739 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1740 list_del(&sdata->list);
c771c9d8 1741
f142c6b9
JB		 1742 if (sdata->dev)
1743 unregister_netdevice_queue(sdata->dev, &unreg_list);
1744 else
1745 list_add(&sdata->list, &wdev_list);
f0706e82 1746 }
efe117ab
ED		 1747 mutex_unlock(&local->iflist_mtx);
1748 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1749
1750 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1751 list_del(&sdata->list);
1752 cfg80211_unregister_wdev(&sdata->wdev);
1753 kfree(sdata);
1754 }
f0706e82 1755}
5cff20e6 1756
47846c9b
JB		 1757static int netdev_notify(struct notifier_block *nb,
1758 unsigned long state,
1759 void *ndev)
1760{
1761 struct net_device *dev = ndev;
1762 struct ieee80211_sub_if_data *sdata;
1763
1764 if (state != NETDEV_CHANGENAME)
1765 return 0;
1766
1767 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1768 return 0;
1769
1770 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1771 return 0;
1772
1773 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1774
2f5265e6 1775 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1776
1777 ieee80211_debugfs_rename_netdev(sdata);
1778 return 0;
1779}
1780
1781static struct notifier_block mac80211_netdev_notifier = {
1782 .notifier_call = netdev_notify,
1783};
1784
1785int ieee80211_iface_init(void)
1786{
1787 return register_netdevice_notifier(&mac80211_netdev_notifier);
1788}
1789
1790void ieee80211_iface_exit(void)
1791{
1792 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1793}
kernel source for telekom puls (alcatel/mediatek)