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cfg80211/mac80211: move combination check to mac80211 for ibss
[mirror_ubuntu-hirsute-kernel.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;
0d143fe1 253
87490f6d 254 ASSERT_RTNL();
0d143fe1
JB		 255
256 /* we hold the RTNL here so can safely walk the list */
257 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 258 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 259 /*
260 * Allow only a single IBSS interface to be up at any
261 * time. This is restricted because beacon distribution
262 * cannot work properly if both are in the same IBSS.
263 *
264 * To remove this restriction we'd have to disallow them
265 * from setting the same SSID on different IBSS interfaces
266 * belonging to the same hardware. Then, however, we're
267 * faced with having to adopt two different TSF timers...
268 */
87490f6d 269 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 270 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
271 return -EBUSY;
73da7d5b
SW		 272 /*
273 * will not add another interface while any channel
274 * switch is active.
275 */
276 if (nsdata->vif.csa_active)
277 return -EBUSY;
0d143fe1
JB		 278
279 /*
280 * The remaining checks are only performed for interfaces
281 * with the same MAC address.
282 */
371a255e
JB		 283 if (!ether_addr_equal(sdata->vif.addr,
284 nsdata->vif.addr))
0d143fe1
JB		 285 continue;
286
287 /*
288 * check whether it may have the same address
289 */
87490f6d 290 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 291 nsdata->vif.type))
292 return -ENOTUNIQ;
293
294 /*
295 * can only add VLANs to enabled APs
296 */
87490f6d 297 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 298 nsdata->vif.type == NL80211_IFTYPE_AP)
299 sdata->bss = &nsdata->u.ap;
300 }
301 }
302
87490f6d
JB		 303 return 0;
304}
305
a9865538
JB		 306static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
307 enum nl80211_iftype iftype)
3a25a8c8
JB		 308{
309 int n_queues = sdata->local->hw.queues;
310 int i;
311
a9865538 312 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 313 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
314 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
315 IEEE80211_INVAL_HW_QUEUE))
316 return -EINVAL;
317 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
318 n_queues))
319 return -EINVAL;
320 }
3a25a8c8
JB		 321 }
322
a9865538
JB		 323 if ((iftype != NL80211_IFTYPE_AP &&
324 iftype != NL80211_IFTYPE_P2P_GO &&
325 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 326 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 327 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
328 return 0;
329 }
330
331 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
332 return -EINVAL;
333
334 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
335 return -EINVAL;
336
337 return 0;
338}
339
85416a4f
CL		 340void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
341 const int offset)
342{
343 struct ieee80211_local *local = sdata->local;
344 u32 flags = sdata->u.mntr_flags;
345
346#define ADJUST(_f, _s) do { \
347 if (flags & MONITOR_FLAG_##_f) \
348 local->fif_##_s += offset; \
349 } while (0)
350
351 ADJUST(FCSFAIL, fcsfail);
352 ADJUST(PLCPFAIL, plcpfail);
353 ADJUST(CONTROL, control);
354 ADJUST(CONTROL, pspoll);
355 ADJUST(OTHER_BSS, other_bss);
356
357#undef ADJUST
358}
359
3a25a8c8
JB		 360static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
361{
362 struct ieee80211_local *local = sdata->local;
363 int i;
364
365 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
366 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
367 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 368 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 369 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 370 else
371 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 372 }
373 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
374}
375
3c3e21e7 376int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 377{
378 struct ieee80211_sub_if_data *sdata;
8b305780 379 int ret;
4b6f1dd6
JB		 380
381 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
382 return 0;
383
8b305780 384 ASSERT_RTNL();
685fb72b 385
4b6f1dd6 386 if (local->monitor_sdata)
8b305780 387 return 0;
4b6f1dd6
JB		 388
389 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 390 if (!sdata)
391 return -ENOMEM;
4b6f1dd6
JB		 392
393 /* set up data */
394 sdata->local = local;
395 sdata->vif.type = NL80211_IFTYPE_MONITOR;
396 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
397 wiphy_name(local->hw.wiphy));
398
2475b1cc
MS		 399 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
400
3a25a8c8
JB		 401 ieee80211_set_default_queues(sdata);
402
4b6f1dd6
JB		 403 ret = drv_add_interface(local, sdata);
404 if (WARN_ON(ret)) {
405 /* ok .. stupid driver, it asked for this! */
406 kfree(sdata);
8b305780 407 return ret;
4b6f1dd6
JB		 408 }
409
a9865538 410 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 411 if (ret) {
412 kfree(sdata);
8b305780 413 return ret;
3a25a8c8
JB		 414 }
415
fab57a6c
JB		 416 mutex_lock(&local->iflist_mtx);
417 rcu_assign_pointer(local->monitor_sdata, sdata);
418 mutex_unlock(&local->iflist_mtx);
419
34a3740d 420 mutex_lock(&local->mtx);
4bf88530 421 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 422 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 423 mutex_unlock(&local->mtx);
55de908a 424 if (ret) {
fab57a6c 425 mutex_lock(&local->iflist_mtx);
0c2bef46 426 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 427 mutex_unlock(&local->iflist_mtx);
428 synchronize_net();
55de908a
JB		 429 drv_remove_interface(local, sdata);
430 kfree(sdata);
8b305780 431 return ret;
55de908a
JB		 432 }
433
8b305780 434 return 0;
4b6f1dd6
JB		 435}
436
3c3e21e7 437void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 438{
439 struct ieee80211_sub_if_data *sdata;
440
441 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
442 return;
443
8b305780
JB		 444 ASSERT_RTNL();
445
685fb72b 446 mutex_lock(&local->iflist_mtx);
4b6f1dd6 447
685fb72b
JB		 448 sdata = rcu_dereference_protected(local->monitor_sdata,
449 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 450 if (!sdata) {
451 mutex_unlock(&local->iflist_mtx);
452 return;
453 }
4b6f1dd6 454
0c2bef46 455 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 456 mutex_unlock(&local->iflist_mtx);
457
4b6f1dd6
JB		 458 synchronize_net();
459
34a3740d 460 mutex_lock(&local->mtx);
55de908a 461 ieee80211_vif_release_channel(sdata);
34a3740d 462 mutex_unlock(&local->mtx);
55de908a 463
4b6f1dd6
JB		 464 drv_remove_interface(local, sdata);
465
466 kfree(sdata);
467}
468
34d4bc4d
JB		 469/*
470 * NOTE: Be very careful when changing this function, it must NOT return
471 * an error on interface type changes that have been pre-checked, so most
472 * checks should be in ieee80211_check_concurrent_iface.
473 */
f142c6b9 474int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 475{
f142c6b9
JB		 476 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
477 struct net_device *dev = wdev->netdev;
87490f6d
JB		 478 struct ieee80211_local *local = sdata->local;
479 struct sta_info *sta;
480 u32 changed = 0;
481 int res;
482 u32 hw_reconf_flags = 0;
483
0d143fe1
JB		 484 switch (sdata->vif.type) {
485 case NL80211_IFTYPE_WDS:
486 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
487 return -ENOLINK;
488 break;
665c93a9
JB		 489 case NL80211_IFTYPE_AP_VLAN: {
490 struct ieee80211_sub_if_data *master;
491
0d143fe1
JB		 492 if (!sdata->bss)
493 return -ENOLINK;
665c93a9 494
0d143fe1 495 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 496
497 master = container_of(sdata->bss,
498 struct ieee80211_sub_if_data, u.ap);
499 sdata->control_port_protocol =
500 master->control_port_protocol;
501 sdata->control_port_no_encrypt =
502 master->control_port_no_encrypt;
1351c5d3
JB		 503 sdata->vif.cab_queue = master->vif.cab_queue;
504 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
505 sizeof(sdata->vif.hw_queue));
0d143fe1 506 break;
665c93a9 507 }
0d143fe1
JB		 508 case NL80211_IFTYPE_AP:
509 sdata->bss = &sdata->u.ap;
510 break;
511 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 512 case NL80211_IFTYPE_STATION:
513 case NL80211_IFTYPE_MONITOR:
514 case NL80211_IFTYPE_ADHOC:
f142c6b9 515 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 516 /* no special treatment */
517 break;
518 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 519 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 520 case NL80211_IFTYPE_P2P_CLIENT:
521 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 522 /* cannot happen */
523 WARN_ON(1);
524 break;
525 }
526
527 if (local->open_count == 0) {
24487981 528 res = drv_start(local);
0d143fe1
JB		 529 if (res)
530 goto err_del_bss;
e8975581
JB		 531 /* we're brought up, everything changes */
532 hw_reconf_flags = ~0;
1f87f7d3 533 ieee80211_led_radio(local, true);
67408c8c
JB		 534 ieee80211_mod_tpt_led_trig(local,
535 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 536 }
537
538 /*
bf533e0b
JB		 539 * Copy the hopefully now-present MAC address to
540 * this interface, if it has the special null one.
0d143fe1 541 */
f142c6b9 542 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 543 memcpy(dev->dev_addr,
544 local->hw.wiphy->perm_addr,
545 ETH_ALEN);
546 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
547
548 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 549 res = -EADDRNOTAVAIL;
550 goto err_stop;
0adc23f5 551 }
0d143fe1
JB		 552 }
553
0d143fe1
JB		 554 switch (sdata->vif.type) {
555 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 556 /* no need to tell driver, but set carrier and chanctx */
557 if (rtnl_dereference(sdata->bss->beacon)) {
558 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 559 netif_carrier_on(dev);
4d76d21b 560 } else {
3edaf3e6 561 netif_carrier_off(dev);
4d76d21b 562 }
0d143fe1
JB		 563 break;
564 case NL80211_IFTYPE_MONITOR:
565 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
566 local->cooked_mntrs++;
567 break;
568 }
569
31eba5bc
FF		 570 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
571 res = drv_add_interface(local, sdata);
572 if (res)
573 goto err_stop;
574 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 575 res = ieee80211_add_virtual_monitor(local);
576 if (res)
577 goto err_stop;
578 }
579
0d143fe1
JB		 580 /* must be before the call to ieee80211_configure_filter */
581 local->monitors++;
e8975581 582 if (local->monitors == 1) {
0869aea0
JB		 583 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
584 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 585 }
0d143fe1 586
85416a4f 587 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 588 ieee80211_configure_filter(local);
801d929c
FF		 589 mutex_lock(&local->mtx);
590 ieee80211_recalc_idle(local);
591 mutex_unlock(&local->mtx);
53e9b1de
DG		 592
593 netif_carrier_on(dev);
0d143fe1 594 break;
0d143fe1 595 default:
34d4bc4d 596 if (coming_up) {
075e0847
JB		 597 ieee80211_del_virtual_monitor(local);
598
7b7eab6f 599 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 600 if (res)
601 goto err_stop;
a9865538
JB		 602 res = ieee80211_check_queues(sdata,
603 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 604 if (res)
605 goto err_del_interface;
34d4bc4d 606 }
0d143fe1 607
29cbe68c 608 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 609 local->fif_pspoll++;
7be5086d 610 local->fif_probe_req++;
e3b90ca2 611
e3b90ca2 612 ieee80211_configure_filter(local);
7be5086d
JB		 613 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
614 local->fif_probe_req++;
a3c9aa51 615 }
e3b90ca2 616
f142c6b9
JB		 617 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
618 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 619 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 620
c405c629
JB		 621 switch (sdata->vif.type) {
622 case NL80211_IFTYPE_STATION:
623 case NL80211_IFTYPE_ADHOC:
624 case NL80211_IFTYPE_AP:
625 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 626 netif_carrier_off(dev);
c405c629 627 break;
1411af15 628 case NL80211_IFTYPE_WDS:
f142c6b9 629 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 630 break;
c405c629 631 default:
a2310824
JB		 632 /* not reached */
633 WARN_ON(1);
c405c629 634 }
59034591
EP		 635
636 /*
637 * set default queue parameters so drivers don't
638 * need to initialise the hardware if the hardware
639 * doesn't start up with sane defaults
640 */
3abead59 641 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 642 }
643
2d2080c3
JB		 644 set_bit(SDATA_STATE_RUNNING, &sdata->state);
645
0d143fe1
JB		 646 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
647 /* Create STA entry for the WDS peer */
648 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
649 GFP_KERNEL);
650 if (!sta) {
651 res = -ENOMEM;
652 goto err_del_interface;
653 }
654
83d5cc01
JB		 655 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
656 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
657 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 658
659 res = sta_info_insert(sta);
660 if (res) {
661 /* STA has been freed */
662 goto err_del_interface;
663 }
1be7fe8d
BJ		 664
665 rate_control_rate_init(sta);
1411af15 666 netif_carrier_on(dev);
f142c6b9
JB		 667 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
668 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 669 }
670
0d143fe1
JB		 671 /*
672 * set_multicast_list will be invoked by the networking core
673 * which will check whether any increments here were done in
674 * error and sync them down to the hardware as filter flags.
675 */
676 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
677 atomic_inc(&local->iff_allmultis);
678
679 if (sdata->flags & IEEE80211_SDATA_PROMISC)
680 atomic_inc(&local->iff_promiscs);
681
34d4bc4d
JB		 682 if (coming_up)
683 local->open_count++;
684
59034591 685 if (hw_reconf_flags)
e8975581 686 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 687
10f644a4 688 ieee80211_recalc_ps(local, -1);
965bedad 689
2b436312
JB		 690 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
691 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
692 /* XXX: for AP_VLAN, actually track AP queues */
693 netif_tx_start_all_queues(dev);
694 } else if (dev) {
2b730daa
JB		 695 unsigned long flags;
696 int n_acs = IEEE80211_NUM_ACS;
697 int ac;
698
699 if (local->hw.queues < IEEE80211_NUM_ACS)
700 n_acs = 1;
701
702 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
703 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
704 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
705 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
706 for (ac = 0; ac < n_acs; ac++) {
707 int ac_queue = sdata->vif.hw_queue[ac];
708
709 if (local->queue_stop_reasons[ac_queue] == 0 &&
710 skb_queue_empty(&local->pending[ac_queue]))
711 netif_start_subqueue(dev, ac);
712 }
713 }
714 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
715 }
0d143fe1
JB		 716
717 return 0;
718 err_del_interface:
7b7eab6f 719 drv_remove_interface(local, sdata);
0d143fe1 720 err_stop:
24487981
JB		 721 if (!local->open_count)
722 drv_stop(local);
0d143fe1
JB		 723 err_del_bss:
724 sdata->bss = NULL;
725 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
726 list_del(&sdata->u.vlan.list);
4d6c36fa 727 /* might already be clear but that doesn't matter */
2d2080c3 728 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 729 return res;
730}
731
34d4bc4d 732static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 733{
734 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 735 int err;
736
737 /* fail early if user set an invalid address */
2fcf2824 738 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 739 return -EADDRNOTAVAIL;
740
741 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
742 if (err)
743 return err;
744
f142c6b9 745 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 746}
747
748static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
749 bool going_down)
750{
0d143fe1 751 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 752 unsigned long flags;
753 struct sk_buff *skb, *tmp;
e8975581 754 u32 hw_reconf_flags = 0;
09f4114e 755 int i, flushed;
397a7a24 756 struct ps_data *ps;
d2859df5 757 struct cfg80211_chan_def chandef;
0d143fe1 758
c29acf20
RM		 759 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
760
e2fd5dbc 761 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 762 ieee80211_scan_cancel(local);
763
0d143fe1
JB		 764 /*
765 * Stop TX on this interface first.
766 */
f142c6b9
JB		 767 if (sdata->dev)
768 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 769
c8f994ee 770 ieee80211_roc_purge(local, sdata);
af6b6374 771
8ffcc704
EG		 772 switch (sdata->vif.type) {
773 case NL80211_IFTYPE_STATION:
572078be 774 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 775 break;
776 case NL80211_IFTYPE_ADHOC:
cd7760e6 777 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 778 break;
779 case NL80211_IFTYPE_AP:
780 cancel_work_sync(&sdata->u.ap.request_smps_work);
781 break;
782 default:
783 break;
784 }
cd7760e6 785
0d143fe1
JB		 786 /*
787 * Remove all stations associated with this interface.
788 *
789 * This must be done before calling ops->remove_interface()
790 * because otherwise we can later invoke ops->sta_notify()
791 * whenever the STAs are removed, and that invalidates driver
792 * assumptions about always getting a vif pointer that is valid
793 * (because if we remove a STA after ops->remove_interface()
794 * the driver will have removed the vif info already!)
795 *
09f4114e
JB		 796 * This is relevant only in WDS mode, in all other modes we've
797 * already removed all stations when disconnecting or similar,
798 * so warn otherwise.
0d143fe1 799 */
d34ba216 800 flushed = sta_info_flush(sdata);
09f4114e
JB		 801 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
802 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 803
afdc7c18 804 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 805 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
806 atomic_dec(&local->iff_allmultis);
807
808 if (sdata->flags & IEEE80211_SDATA_PROMISC)
809 atomic_dec(&local->iff_promiscs);
810
7be5086d 811 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 812 local->fif_pspoll--;
7be5086d
JB		 813 local->fif_probe_req--;
814 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
815 local->fif_probe_req--;
816 }
e3b90ca2 817
f142c6b9
JB		 818 if (sdata->dev) {
819 netif_addr_lock_bh(sdata->dev);
820 spin_lock_bh(&local->filter_lock);
821 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
822 sdata->dev->addr_len);
823 spin_unlock_bh(&local->filter_lock);
824 netif_addr_unlock_bh(sdata->dev);
f142c6b9 825 }
3ac64bee 826
7cbf0ba5
VN		 827 del_timer_sync(&local->dynamic_ps_timer);
828 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 829
04ecd257 830 cancel_work_sync(&sdata->recalc_smps);
dbd72850 831 sdata_lock(sdata);
73da7d5b 832 sdata->vif.csa_active = false;
dbd72850 833 sdata_unlock(sdata);
73da7d5b 834 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 835
164eb02d
SW		 836 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
837
838 if (sdata->wdev.cac_started) {
d2859df5 839 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 840 WARN_ON(local->suspended);
34a3740d 841 mutex_lock(&local->mtx);
164eb02d 842 ieee80211_vif_release_channel(sdata);
34a3740d 843 mutex_unlock(&local->mtx);
d2859df5
JD		 844 cfg80211_cac_event(sdata->dev, &chandef,
845 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 846 GFP_KERNEL);
847 }
848
0d143fe1
JB		 849 /* APs need special treatment */
850 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 851 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 852
853 /* down all dependent devices, that is VLANs */
57c9fff3 854 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 855 u.vlan.list)
856 dev_close(vlan->dev);
857 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 858 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
859 /* remove all packets in parent bc_buf pointing to this dev */
860 ps = &sdata->bss->ps;
861
862 spin_lock_irqsave(&ps->bc_buf.lock, flags);
863 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
864 if (skb->dev == sdata->dev) {
865 __skb_unlink(skb, &ps->bc_buf);
866 local->total_ps_buffered--;
867 ieee80211_free_txskb(&local->hw, skb);
868 }
869 }
870 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 871 }
872
34d4bc4d
JB		 873 if (going_down)
874 local->open_count--;
0d143fe1
JB		 875
876 switch (sdata->vif.type) {
877 case NL80211_IFTYPE_AP_VLAN:
878 list_del(&sdata->u.vlan.list);
0c2bef46 879 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 880 /* no need to tell driver */
881 break;
882 case NL80211_IFTYPE_MONITOR:
883 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
884 local->cooked_mntrs--;
885 break;
886 }
887
888 local->monitors--;
e8975581 889 if (local->monitors == 0) {
0869aea0
JB		 890 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
891 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 892 }
0d143fe1 893
85416a4f 894 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 895 break;
f142c6b9
JB		 896 case NL80211_IFTYPE_P2P_DEVICE:
897 /* relies on synchronize_rcu() below */
0c2bef46 898 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 899 /* fall through */
0d143fe1 900 default:
0b7dff4f 901 cancel_work_sync(&sdata->work);
35f20c14
JB		 902 /*
903 * When we get here, the interface is marked down.
7907c7d3
JB		 904 * Free the remaining keys, if there are any
905 * (shouldn't be, except maybe in WDS mode?)
75de9113 906 *
7907c7d3
JB		 907 * Force the key freeing to always synchronize_net()
908 * to wait for the RX path in case it is using this
909 * interface enqueuing frames * at this very time on
75de9113 910 * another CPU.
35f20c14 911 */
7907c7d3 912 ieee80211_free_keys(sdata, true);
b9dcf712 913
1861b845
JB		 914 /* fall through */
915 case NL80211_IFTYPE_AP:
916 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 917 }
918
919 sdata->bss = NULL;
920
5061b0c2
JB		 921 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
922 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
923 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
924 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
925 if (info->control.vif == &sdata->vif) {
926 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 927 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 928 }
929 }
930 }
931 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 932
b2c0958b
JB		 933 if (local->open_count == 0)
934 ieee80211_clear_tx_pending(local);
935
936 /*
937 * If the interface goes down while suspended, presumably because
938 * the device was unplugged and that happens before our resume,
939 * then the driver is already unconfigured and the remainder of
940 * this function isn't needed.
941 * XXX: what about WoWLAN? If the device has software state, e.g.
942 * memory allocated, it might expect teardown commands from
943 * mac80211 here?
944 */
945 if (local->suspended) {
946 WARN_ON(local->wowlan);
947 WARN_ON(rtnl_dereference(local->monitor_sdata));
948 return;
949 }
950
951 switch (sdata->vif.type) {
952 case NL80211_IFTYPE_AP_VLAN:
953 break;
954 case NL80211_IFTYPE_MONITOR:
955 if (local->monitors == 0)
956 ieee80211_del_virtual_monitor(local);
957
958 mutex_lock(&local->mtx);
959 ieee80211_recalc_idle(local);
960 mutex_unlock(&local->mtx);
31eba5bc
FF		 961
962 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
963 break;
964
965 /* fall through */
b2c0958b
JB		 966 default:
967 if (going_down)
968 drv_remove_interface(local, sdata);
969 }
970
971 ieee80211_recalc_ps(local, -1);
972
973 if (local->open_count == 0) {
974 ieee80211_stop_device(local);
975
976 /* no reconfiguring after stop! */
977 return;
978 }
979
980 /* do after stop to avoid reconfiguring when we stop anyway */
981 ieee80211_configure_filter(local);
982 ieee80211_hw_config(local, hw_reconf_flags);
983
984 if (local->monitors == local->open_count)
075e0847 985 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 986}
987
988static int ieee80211_stop(struct net_device *dev)
989{
990 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
991
992 ieee80211_do_stop(sdata, true);
5061b0c2 993
0d143fe1
JB		 994 return 0;
995}
996
997static void ieee80211_set_multicast_list(struct net_device *dev)
998{
0d143fe1 999 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1000 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1001 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1002
1003 allmulti = !!(dev->flags & IFF_ALLMULTI);
1004 promisc = !!(dev->flags & IFF_PROMISC);
1005 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1006 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1007
1008 if (allmulti != sdata_allmulti) {
1009 if (dev->flags & IFF_ALLMULTI)
1010 atomic_inc(&local->iff_allmultis);
1011 else
1012 atomic_dec(&local->iff_allmultis);
1013 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1014 }
1015
1016 if (promisc != sdata_promisc) {
1017 if (dev->flags & IFF_PROMISC)
1018 atomic_inc(&local->iff_promiscs);
1019 else
1020 atomic_dec(&local->iff_promiscs);
1021 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1022 }
3b8d81e0 1023 spin_lock_bh(&local->filter_lock);
22bedad3 1024 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1025 spin_unlock_bh(&local->filter_lock);
3ac64bee 1026 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1027}
1028
75636525
JB		 1029/*
1030 * Called when the netdev is removed or, by the code below, before
1031 * the interface type changes.
1032 */
f142c6b9 1033static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1034{
1035 int i;
1036
75636525 1037 /* free extra data */
7907c7d3 1038 ieee80211_free_keys(sdata, false);
75636525 1039
aee14ceb
JM		 1040 ieee80211_debugfs_remove_netdev(sdata);
1041
f0706e82 1042 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1043 __skb_queue_purge(&sdata->fragments[i].skb_list);
1044 sdata->fragment_next = 0;
11a843b7 1045
b9dcf712
JB		 1046 if (ieee80211_vif_is_mesh(&sdata->vif))
1047 mesh_rmc_free(sdata);
f0706e82
JB		 1048}
1049
f142c6b9
JB		 1050static void ieee80211_uninit(struct net_device *dev)
1051{
1052 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1053}
1054
cf0277e7 1055static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1056 struct sk_buff *skb,
99932d4f
DB		 1057 void *accel_priv,
1058 select_queue_fallback_t fallback)
cf0277e7
JB		 1059{
1060 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1061}
1062
587e729e
JB		 1063static const struct net_device_ops ieee80211_dataif_ops = {
1064 .ndo_open = ieee80211_open,
1065 .ndo_stop = ieee80211_stop,
f142c6b9 1066 .ndo_uninit = ieee80211_uninit,
587e729e 1067 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1068 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1069 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1070 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1071 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1072};
1073
cf0277e7 1074static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1075 struct sk_buff *skb,
99932d4f
DB		 1076 void *accel_priv,
1077 select_queue_fallback_t fallback)
cf0277e7
JB		 1078{
1079 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1080 struct ieee80211_local *local = sdata->local;
1081 struct ieee80211_hdr *hdr;
1082 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1083
32c5057b 1084 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1085 return 0;
1086
1087 if (skb->len < 4 ||
b49bb574 1088 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1089 return 0; /* doesn't matter, frame will be dropped */
1090
b49bb574 1091 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1092
00e96dec 1093 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1094}
1095
587e729e
JB		 1096static const struct net_device_ops ieee80211_monitorif_ops = {
1097 .ndo_open = ieee80211_open,
1098 .ndo_stop = ieee80211_stop,
f142c6b9 1099 .ndo_uninit = ieee80211_uninit,
587e729e 1100 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1101 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1102 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1103 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1104 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1105};
1106
1107static void ieee80211_if_setup(struct net_device *dev)
1108{
1109 ether_setup(dev);
550fd08c 1110 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1111 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1112 dev->destructor = free_netdev;
1113}
1114
1fa57d01
JB		 1115static void ieee80211_iface_work(struct work_struct *work)
1116{
1117 struct ieee80211_sub_if_data *sdata =
1118 container_of(work, struct ieee80211_sub_if_data, work);
1119 struct ieee80211_local *local = sdata->local;
1120 struct sk_buff *skb;
344eec67 1121 struct sta_info *sta;
c1475ca9 1122 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1123
1124 if (!ieee80211_sdata_running(sdata))
1125 return;
1126
1127 if (local->scanning)
1128 return;
1129
1130 /*
1131 * ieee80211_queue_work() should have picked up most cases,
1132 * here we'll pick the rest.
1133 */
1134 if (WARN(local->suspended,
1135 "interface work scheduled while going to suspend\n"))
1136 return;
1137
1138 /* first process frames */
1139 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1140 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1141
c1475ca9
JB		 1142 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1143 ra_tid = (void *)&skb->cb;
1144 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1145 ra_tid->tid);
1146 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1147 ra_tid = (void *)&skb->cb;
1148 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1149 ra_tid->tid);
1150 } else if (ieee80211_is_action(mgmt->frame_control) &&
1151 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1152 int len = skb->len;
bed7ee6e 1153
a93e3644 1154 mutex_lock(&local->sta_mtx);
875ae5f6 1155 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1156 if (sta) {
1157 switch (mgmt->u.action.u.addba_req.action_code) {
1158 case WLAN_ACTION_ADDBA_REQ:
1159 ieee80211_process_addba_request(
1160 local, sta, mgmt, len);
1161 break;
1162 case WLAN_ACTION_ADDBA_RESP:
1163 ieee80211_process_addba_resp(local, sta,
1164 mgmt, len);
1165 break;
1166 case WLAN_ACTION_DELBA:
1167 ieee80211_process_delba(sdata, sta,
1168 mgmt, len);
1169 break;
1170 default:
1171 WARN_ON(1);
1172 break;
1173 }
1174 }
a93e3644 1175 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1176 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1177 struct ieee80211_hdr *hdr = (void *)mgmt;
1178 /*
1179 * So the frame isn't mgmt, but frame_control
1180 * is at the right place anyway, of course, so
1181 * the if statement is correct.
1182 *
1183 * Warn if we have other data frame types here,
1184 * they must not get here.
1185 */
1186 WARN_ON(hdr->frame_control &
1187 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1188 WARN_ON(!(hdr->seq_ctrl &
1189 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1190 /*
1191 * This was a fragment of a frame, received while
1192 * a block-ack session was active. That cannot be
1193 * right, so terminate the session.
1194 */
a93e3644 1195 mutex_lock(&local->sta_mtx);
875ae5f6 1196 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1197 if (sta) {
1198 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1199 IEEE80211_QOS_CTL_TID_MASK;
1200
1201 __ieee80211_stop_rx_ba_session(
1202 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1203 WLAN_REASON_QSTA_REQUIRE_SETUP,
1204 true);
344eec67 1205 }
a93e3644 1206 mutex_unlock(&local->sta_mtx);
bed7ee6e 1207 } else switch (sdata->vif.type) {
1fa57d01
JB		 1208 case NL80211_IFTYPE_STATION:
1209 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1210 break;
1211 case NL80211_IFTYPE_ADHOC:
1212 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1213 break;
1214 case NL80211_IFTYPE_MESH_POINT:
1215 if (!ieee80211_vif_is_mesh(&sdata->vif))
1216 break;
1217 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1218 break;
1219 default:
1220 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1221 break;
1222 }
36b3a628
JB		 1223
1224 kfree_skb(skb);
1fa57d01
JB		 1225 }
1226
1227 /* then other type-dependent work */
1228 switch (sdata->vif.type) {
1229 case NL80211_IFTYPE_STATION:
1230 ieee80211_sta_work(sdata);
1231 break;
1232 case NL80211_IFTYPE_ADHOC:
1233 ieee80211_ibss_work(sdata);
1234 break;
1235 case NL80211_IFTYPE_MESH_POINT:
1236 if (!ieee80211_vif_is_mesh(&sdata->vif))
1237 break;
1238 ieee80211_mesh_work(sdata);
1239 break;
1240 default:
1241 break;
1242 }
1243}
1244
04ecd257
JB		 1245static void ieee80211_recalc_smps_work(struct work_struct *work)
1246{
1247 struct ieee80211_sub_if_data *sdata =
1248 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1249
1250 ieee80211_recalc_smps(sdata);
1251}
1fa57d01 1252
75636525
JB		 1253/*
1254 * Helper function to initialise an interface to a specific type.
1255 */
1256static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1257 enum nl80211_iftype type)
f0706e82 1258{
75636525
JB		 1259 /* clear type-dependent union */
1260 memset(&sdata->u, 0, sizeof(sdata->u));
1261
1262 /* and set some type-dependent values */
1263 sdata->vif.type = type;
2ca27bcf 1264 sdata->vif.p2p = false;
60719ffd 1265 sdata->wdev.iftype = type;
75636525 1266
a621fa4d
JB		 1267 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1268 sdata->control_port_no_encrypt = false;
2475b1cc 1269 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1270
b53be792
SW		 1271 sdata->noack_map = 0;
1272
f142c6b9
JB		 1273 /* only monitor/p2p-device differ */
1274 if (sdata->dev) {
1275 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1276 sdata->dev->type = ARPHRD_ETHER;
1277 }
75636525 1278
35f20c14 1279 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1280 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1281 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1282 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1283
75636525 1284 switch (type) {
2ca27bcf
JB		 1285 case NL80211_IFTYPE_P2P_GO:
1286 type = NL80211_IFTYPE_AP;
1287 sdata->vif.type = type;
1288 sdata->vif.p2p = true;
1289 /* fall through */
05c914fe 1290 case NL80211_IFTYPE_AP:
d012a605 1291 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1292 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1293 INIT_WORK(&sdata->u.ap.request_smps_work,
1294 ieee80211_request_smps_ap_work);
ad2d223a 1295 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1296 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1297 break;
2ca27bcf
JB		 1298 case NL80211_IFTYPE_P2P_CLIENT:
1299 type = NL80211_IFTYPE_STATION;
1300 sdata->vif.type = type;
1301 sdata->vif.p2p = true;
1302 /* fall through */
05c914fe 1303 case NL80211_IFTYPE_STATION:
ad2d223a 1304 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1305 ieee80211_sta_setup_sdata(sdata);
472dbc45 1306 break;
46900298 1307 case NL80211_IFTYPE_ADHOC:
ad2d223a 1308 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1309 ieee80211_ibss_setup_sdata(sdata);
1310 break;
05c914fe 1311 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1312 if (ieee80211_vif_is_mesh(&sdata->vif))
1313 ieee80211_mesh_init_sdata(sdata);
1314 break;
05c914fe 1315 case NL80211_IFTYPE_MONITOR:
75636525 1316 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1317 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1318 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1319 MONITOR_FLAG_OTHER_BSS;
1320 break;
05c914fe 1321 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1322 sdata->vif.bss_conf.bssid = NULL;
1323 break;
05c914fe 1324 case NL80211_IFTYPE_AP_VLAN:
98104fde 1325 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1326 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1327 break;
05c914fe 1328 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1329 case NUM_NL80211_IFTYPES:
75636525
JB		 1330 BUG();
1331 break;
1332 }
1333
1334 ieee80211_debugfs_add_netdev(sdata);
1335}
1336
34d4bc4d
JB		 1337static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1338 enum nl80211_iftype type)
1339{
1340 struct ieee80211_local *local = sdata->local;
1341 int ret, err;
2ca27bcf
JB		 1342 enum nl80211_iftype internal_type = type;
1343 bool p2p = false;
34d4bc4d
JB		 1344
1345 ASSERT_RTNL();
1346
1347 if (!local->ops->change_interface)
1348 return -EBUSY;
1349
1350 switch (sdata->vif.type) {
1351 case NL80211_IFTYPE_AP:
1352 case NL80211_IFTYPE_STATION:
1353 case NL80211_IFTYPE_ADHOC:
1354 /*
1355 * Could maybe also all others here?
1356 * Just not sure how that interacts
1357 * with the RX/config path e.g. for
1358 * mesh.
1359 */
1360 break;
1361 default:
1362 return -EBUSY;
1363 }
1364
1365 switch (type) {
1366 case NL80211_IFTYPE_AP:
1367 case NL80211_IFTYPE_STATION:
1368 case NL80211_IFTYPE_ADHOC:
1369 /*
1370 * Could probably support everything
1371 * but WDS here (WDS do_open can fail
1372 * under memory pressure, which this
1373 * code isn't prepared to handle).
1374 */
1375 break;
2ca27bcf
JB		 1376 case NL80211_IFTYPE_P2P_CLIENT:
1377 p2p = true;
1378 internal_type = NL80211_IFTYPE_STATION;
1379 break;
1380 case NL80211_IFTYPE_P2P_GO:
1381 p2p = true;
1382 internal_type = NL80211_IFTYPE_AP;
1383 break;
34d4bc4d
JB		 1384 default:
1385 return -EBUSY;
1386 }
1387
2ca27bcf 1388 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1389 if (ret)
1390 return ret;
1391
1392 ieee80211_do_stop(sdata, false);
1393
f142c6b9 1394 ieee80211_teardown_sdata(sdata);
34d4bc4d 1395
2ca27bcf 1396 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1397 if (ret)
a9865538 1398 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1399
3a25a8c8
JB		 1400 /*
1401 * Ignore return value here, there's not much we can do since
1402 * the driver changed the interface type internally already.
1403 * The warnings will hopefully make driver authors fix it :-)
1404 */
a9865538 1405 ieee80211_check_queues(sdata, type);
3a25a8c8 1406
34d4bc4d
JB		 1407 ieee80211_setup_sdata(sdata, type);
1408
f142c6b9 1409 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1410 WARN(err, "type change: do_open returned %d", err);
1411
1412 return ret;
1413}
1414
f3947e2d 1415int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1416 enum nl80211_iftype type)
75636525 1417{
34d4bc4d
JB		 1418 int ret;
1419
f3947e2d
JB		 1420 ASSERT_RTNL();
1421
2ca27bcf 1422 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1423 return 0;
1424
34d4bc4d
JB		 1425 if (ieee80211_sdata_running(sdata)) {
1426 ret = ieee80211_runtime_change_iftype(sdata, type);
1427 if (ret)
1428 return ret;
1429 } else {
1430 /* Purge and reset type-dependent state. */
f142c6b9 1431 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1432 ieee80211_setup_sdata(sdata, type);
1433 }
75636525
JB		 1434
1435 /* reset some values that shouldn't be kept across type changes */
75636525 1436 sdata->drop_unencrypted = 0;
9bc383de
JB		 1437 if (type == NL80211_IFTYPE_STATION)
1438 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1439
1440 return 0;
f0706e82
JB		 1441}
1442
fa9029f8 1443static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1444 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1445{
1446 struct ieee80211_sub_if_data *sdata;
1447 u64 mask, start, addr, val, inc;
1448 u8 *m;
1449 u8 tmp_addr[ETH_ALEN];
1450 int i;
1451
1452 /* default ... something at least */
f142c6b9 1453 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1454
1455 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1456 local->hw.wiphy->n_addresses <= 1)
1457 return;
1458
fa9029f8
JB		 1459 mutex_lock(&local->iflist_mtx);
1460
1461 switch (type) {
1462 case NL80211_IFTYPE_MONITOR:
1463 /* doesn't matter */
1464 break;
1465 case NL80211_IFTYPE_WDS:
1466 case NL80211_IFTYPE_AP_VLAN:
1467 /* match up with an AP interface */
1468 list_for_each_entry(sdata, &local->interfaces, list) {
1469 if (sdata->vif.type != NL80211_IFTYPE_AP)
1470 continue;
f142c6b9 1471 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1472 break;
1473 }
1474 /* keep default if no AP interface present */
1475 break;
6d71117a
JB		 1476 case NL80211_IFTYPE_P2P_CLIENT:
1477 case NL80211_IFTYPE_P2P_GO:
1478 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1479 list_for_each_entry(sdata, &local->interfaces, list) {
1480 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1481 continue;
1482 if (!ieee80211_sdata_running(sdata))
1483 continue;
1484 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1485 goto out_unlock;
1486 }
1487 }
1488 /* otherwise fall through */
fa9029f8
JB		 1489 default:
1490 /* assign a new address if possible -- try n_addresses first */
1491 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1492 bool used = false;
1493
1494 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1495 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1496 sdata->vif.addr)) {
fa9029f8
JB		 1497 used = true;
1498 break;
1499 }
1500 }
1501
1502 if (!used) {
f142c6b9 1503 memcpy(perm_addr,
fa9029f8
JB		 1504 local->hw.wiphy->addresses[i].addr,
1505 ETH_ALEN);
1506 break;
1507 }
1508 }
1509
1510 /* try mask if available */
1511 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1512 break;
1513
1514 m = local->hw.wiphy->addr_mask;
1515 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1516 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1517 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1518
1519 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1520 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1521 pr_info("not contiguous\n");
fa9029f8
JB		 1522 break;
1523 }
1524
ac20976d
HS		 1525 /*
1526 * Pick address of existing interface in case user changed
1527 * MAC address manually, default to perm_addr.
1528 */
fa9029f8 1529 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1530 list_for_each_entry(sdata, &local->interfaces, list) {
1531 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1532 continue;
1533 m = sdata->vif.addr;
1534 break;
1535 }
fa9029f8
JB		 1536 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1537 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1538 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1539
1540 inc = 1ULL<<__ffs64(mask);
1541 val = (start & mask);
1542 addr = (start & ~mask) | (val & mask);
1543 do {
1544 bool used = false;
1545
1546 tmp_addr[5] = addr >> 0*8;
1547 tmp_addr[4] = addr >> 1*8;
1548 tmp_addr[3] = addr >> 2*8;
1549 tmp_addr[2] = addr >> 3*8;
1550 tmp_addr[1] = addr >> 4*8;
1551 tmp_addr[0] = addr >> 5*8;
1552
1553 val += inc;
1554
1555 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1556 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1557 used = true;
1558 break;
1559 }
1560 }
1561
1562 if (!used) {
f142c6b9 1563 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1564 break;
1565 }
1566 addr = (start & ~mask) | (val & mask);
1567 } while (addr != start);
1568
1569 break;
1570 }
1571
6d71117a 1572 out_unlock:
fa9029f8
JB		 1573 mutex_unlock(&local->iflist_mtx);
1574}
1575
3e122be0 1576int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1577 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1578 struct vif_params *params)
f0706e82 1579{
f142c6b9 1580 struct net_device *ndev = NULL;
f0706e82 1581 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1582 int ret, i;
ded81f6b 1583 int txqs = 1;
f0706e82
JB		 1584
1585 ASSERT_RTNL();
75636525 1586
f142c6b9
JB		 1587 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1588 struct wireless_dev *wdev;
1589
1590 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1591 GFP_KERNEL);
1592 if (!sdata)
1593 return -ENOMEM;
1594 wdev = &sdata->wdev;
1595
1596 sdata->dev = NULL;
1597 strlcpy(sdata->name, name, IFNAMSIZ);
1598 ieee80211_assign_perm_addr(local, wdev->address, type);
1599 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1600 } else {
1601 if (local->hw.queues >= IEEE80211_NUM_ACS)
1602 txqs = IEEE80211_NUM_ACS;
1603
1604 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1605 local->hw.vif_data_size,
1606 name, ieee80211_if_setup, txqs, 1);
1607 if (!ndev)
1608 return -ENOMEM;
1609 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1610
1611 ndev->needed_headroom = local->tx_headroom +
1612 4*6 /* four MAC addresses */
1613 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1614 + 6 /* mesh */
1615 + 8 /* rfc1042/bridge tunnel */
1616 - ETH_HLEN /* ethernet hard_header_len */
1617 + IEEE80211_ENCRYPT_HEADROOM;
1618 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1619
1620 ret = dev_alloc_name(ndev, ndev->name);
1621 if (ret < 0) {
1622 free_netdev(ndev);
1623 return ret;
1624 }
1625
1626 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1627 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1628 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1629
1630 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1631 sdata = netdev_priv(ndev);
1632 ndev->ieee80211_ptr = &sdata->wdev;
1633 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1634 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1635
1636 sdata->dev = ndev;
1637 }
75636525
JB		 1638
1639 /* initialise type-independent data */
f0706e82 1640 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1641 sdata->local = local;
75636525
JB		 1642
1643 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1644 skb_queue_head_init(&sdata->fragments[i].skb_list);
1645
1646 INIT_LIST_HEAD(&sdata->key_list);
1647
164eb02d
SW		 1648 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1649 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1650 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1651 ieee80211_delayed_tailroom_dec);
97f97b1f 1652
37eb0b16
JM		 1653 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1654 struct ieee80211_supported_band *sband;
1655 sband = local->hw.wiphy->bands[i];
1656 sdata->rc_rateidx_mask[i] =
1657 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1658 if (sband)
1659 memcpy(sdata->rc_rateidx_mcs_mask[i],
1660 sband->ht_cap.mcs.rx_mask,
1661 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1662 else
1663 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1664 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1665 }
75636525 1666
3a25a8c8
JB		 1667 ieee80211_set_default_queues(sdata);
1668
1ea6f9c0
JB		 1669 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1670 sdata->user_power_level = local->user_power_level;
1671
2475b1cc
MS		 1672 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1673
75636525
JB		 1674 /* setup type-dependent data */
1675 ieee80211_setup_sdata(sdata, type);
f0706e82 1676
f142c6b9
JB		 1677 if (ndev) {
1678 if (params) {
1679 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1680 if (type == NL80211_IFTYPE_STATION)
1681 sdata->u.mgd.use_4addr = params->use_4addr;
1682 }
9bc383de 1683
f142c6b9 1684 ndev->features |= local->hw.netdev_features;
72d78728 1685
f142c6b9
JB		 1686 ret = register_netdevice(ndev);
1687 if (ret) {
1688 free_netdev(ndev);
1689 return ret;
1690 }
1691 }
f0706e82 1692
c771c9d8 1693 mutex_lock(&local->iflist_mtx);
79010420 1694 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1695 mutex_unlock(&local->iflist_mtx);
79010420 1696
84efbb84
JB		 1697 if (new_wdev)
1698 *new_wdev = &sdata->wdev;
f0706e82 1699
f0706e82 1700 return 0;
f0706e82
JB		 1701}
1702
f698d856 1703void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1704{
f0706e82 1705 ASSERT_RTNL();
11a843b7 1706
c771c9d8 1707 mutex_lock(&sdata->local->iflist_mtx);
75636525 1708 list_del_rcu(&sdata->list);
c771c9d8
JB		 1709 mutex_unlock(&sdata->local->iflist_mtx);
1710
75636525 1711 synchronize_rcu();
f142c6b9
JB		 1712
1713 if (sdata->dev) {
1714 unregister_netdevice(sdata->dev);
1715 } else {
1716 cfg80211_unregister_wdev(&sdata->wdev);
1717 kfree(sdata);
1718 }
1719}
1720
1721void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1722{
1723 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1724 return;
1725 ieee80211_do_stop(sdata, true);
1726 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1727}
1728
75636525
JB		 1729/*
1730 * Remove all interfaces, may only be called at hardware unregistration
1731 * time because it doesn't do RCU-safe list removals.
1732 */
1733void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1734{
75636525 1735 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1736 LIST_HEAD(unreg_list);
f142c6b9 1737 LIST_HEAD(wdev_list);
f0706e82
JB		 1738
1739 ASSERT_RTNL();
1740
c8aa22db
JB		 1741 /*
1742 * Close all AP_VLAN interfaces first, as otherwise they
1743 * might be closed while the AP interface they belong to
1744 * is closed, causing unregister_netdevice_many() to crash.
1745 */
1746 list_for_each_entry(sdata, &local->interfaces, list)
1747 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1748 dev_close(sdata->dev);
1749
efe117ab 1750 mutex_lock(&local->iflist_mtx);
75636525
JB		 1751 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1752 list_del(&sdata->list);
c771c9d8 1753
f142c6b9
JB		 1754 if (sdata->dev)
1755 unregister_netdevice_queue(sdata->dev, &unreg_list);
1756 else
1757 list_add(&sdata->list, &wdev_list);
f0706e82 1758 }
efe117ab
ED		 1759 mutex_unlock(&local->iflist_mtx);
1760 unregister_netdevice_many(&unreg_list);
5f04d506 1761 list_del(&unreg_list);
f142c6b9
JB		 1762
1763 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1764 list_del(&sdata->list);
1765 cfg80211_unregister_wdev(&sdata->wdev);
1766 kfree(sdata);
1767 }
f0706e82 1768}
5cff20e6 1769
47846c9b 1770static int netdev_notify(struct notifier_block *nb,
351638e7 1771 unsigned long state, void *ptr)
47846c9b 1772{
351638e7 1773 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1774 struct ieee80211_sub_if_data *sdata;
1775
1776 if (state != NETDEV_CHANGENAME)
1777 return 0;
1778
1779 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1780 return 0;
1781
1782 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1783 return 0;
1784
1785 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1786
2f5265e6 1787 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1788
1789 ieee80211_debugfs_rename_netdev(sdata);
1790 return 0;
1791}
1792
1793static struct notifier_block mac80211_netdev_notifier = {
1794 .notifier_call = netdev_notify,
1795};
1796
1797int ieee80211_iface_init(void)
1798{
1799 return register_netdevice_notifier(&mac80211_netdev_notifier);
1800}
1801
1802void ieee80211_iface_exit(void)
1803{
1804 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1805}
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