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mac80211_hwsim: allow creation of single-channel radios with chanctx
[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{
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
3899ba90 162static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 163 bool check_dup)
478622e8 164{
ac20976d
HS		 165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_sub_if_data *iter;
478622e8
HS		 167 u64 new, mask, tmp;
168 u8 *m;
169 int ret = 0;
170
171 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
172 return 0;
173
174 m = addr;
175 new = ((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
179 m = local->hw.wiphy->addr_mask;
180 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
181 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
182 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
183
31eba5bc
FF		 184 if (!check_dup)
185 return ret;
478622e8
HS		 186
187 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 188 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter == sdata)
478622e8
HS		 190 continue;
191
3899ba90
JL		 192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
193 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 194 continue;
195
ac20976d 196 m = iter->vif.addr;
478622e8
HS		 197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
200
201 if ((new & ~mask) != (tmp & ~mask)) {
202 ret = -EINVAL;
203 break;
204 }
205 }
206 mutex_unlock(&local->iflist_mtx);
207
208 return ret;
209}
210
47846c9b
JB		 211static int ieee80211_change_mac(struct net_device *dev, void *addr)
212{
213 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 214 struct sockaddr *sa = addr;
31eba5bc 215 bool check_dup = true;
47846c9b
JB		 216 int ret;
217
9607e6b6 218 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 219 return -EBUSY;
220
31eba5bc
FF		 221 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
222 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
223 check_dup = false;
224
3899ba90 225 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 226 if (ret)
227 return ret;
228
fc5f7577 229 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 230
231 if (ret == 0)
fc5f7577 232 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 233
234 return ret;
235}
236
0d143fe1
JB		 237static inline int identical_mac_addr_allowed(int type1, int type2)
238{
239 return type1 == NL80211_IFTYPE_MONITOR ||
240 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 241 type1 == NL80211_IFTYPE_P2P_DEVICE ||
242 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
244 (type1 == NL80211_IFTYPE_WDS &&
245 (type2 == NL80211_IFTYPE_WDS ||
246 type2 == NL80211_IFTYPE_AP)) ||
247 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
248 (type1 == NL80211_IFTYPE_AP_VLAN &&
249 (type2 == NL80211_IFTYPE_AP ||
250 type2 == NL80211_IFTYPE_AP_VLAN));
251}
252
87490f6d
JB		 253static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
254 enum nl80211_iftype iftype)
0d143fe1 255{
b4a4bf5d 256 struct ieee80211_local *local = sdata->local;
87490f6d 257 struct ieee80211_sub_if_data *nsdata;
0d143fe1 258
87490f6d 259 ASSERT_RTNL();
0d143fe1
JB		 260
261 /* we hold the RTNL here so can safely walk the list */
262 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 263 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 264 /*
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
268 *
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
273 */
87490f6d 274 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
276 return -EBUSY;
73da7d5b
SW		 277 /*
278 * will not add another interface while any channel
279 * switch is active.
280 */
281 if (nsdata->vif.csa_active)
282 return -EBUSY;
0d143fe1
JB		 283
284 /*
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
287 */
371a255e
JB		 288 if (!ether_addr_equal(sdata->vif.addr,
289 nsdata->vif.addr))
0d143fe1
JB		 290 continue;
291
292 /*
293 * check whether it may have the same address
294 */
87490f6d 295 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 296 nsdata->vif.type))
297 return -ENOTUNIQ;
298
299 /*
300 * can only add VLANs to enabled APs
301 */
87490f6d 302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
305 }
306 }
307
87490f6d
JB		 308 return 0;
309}
310
a9865538
JB		 311static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
3a25a8c8
JB		 313{
314 int n_queues = sdata->local->hw.queues;
315 int i;
316
a9865538 317 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
0ef24e52
IP		 318 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
319 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
320 IEEE80211_INVAL_HW_QUEUE))
321 return -EINVAL;
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
323 n_queues))
324 return -EINVAL;
325 }
3a25a8c8
JB		 326 }
327
a9865538
JB		 328 if ((iftype != NL80211_IFTYPE_AP &&
329 iftype != NL80211_IFTYPE_P2P_GO &&
330 iftype != NL80211_IFTYPE_MESH_POINT) ||
bb3e10fb 331 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
3a25a8c8
JB		 332 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
333 return 0;
334 }
335
336 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
337 return -EINVAL;
338
339 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
340 return -EINVAL;
341
342 return 0;
343}
344
85416a4f
CL		 345void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
346 const int offset)
347{
348 struct ieee80211_local *local = sdata->local;
349 u32 flags = sdata->u.mntr_flags;
350
351#define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
354 } while (0)
355
356 ADJUST(FCSFAIL, fcsfail);
357 ADJUST(PLCPFAIL, plcpfail);
358 ADJUST(CONTROL, control);
359 ADJUST(CONTROL, pspoll);
360 ADJUST(OTHER_BSS, other_bss);
361
362#undef ADJUST
363}
364
3a25a8c8
JB		 365static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
366{
367 struct ieee80211_local *local = sdata->local;
368 int i;
369
370 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
371 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
372 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
a9d3c05c 373 else if (local->hw.queues >= IEEE80211_NUM_ACS)
3a25a8c8 374 sdata->vif.hw_queue[i] = i;
a9d3c05c
JB		 375 else
376 sdata->vif.hw_queue[i] = 0;
3a25a8c8
JB		 377 }
378 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
379}
380
3c3e21e7 381int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 382{
383 struct ieee80211_sub_if_data *sdata;
8b305780 384 int ret;
4b6f1dd6
JB		 385
386 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
387 return 0;
388
8b305780 389 ASSERT_RTNL();
685fb72b 390
4b6f1dd6 391 if (local->monitor_sdata)
8b305780 392 return 0;
4b6f1dd6
JB		 393
394 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
8b305780
JB		 395 if (!sdata)
396 return -ENOMEM;
4b6f1dd6
JB		 397
398 /* set up data */
399 sdata->local = local;
400 sdata->vif.type = NL80211_IFTYPE_MONITOR;
401 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
402 wiphy_name(local->hw.wiphy));
403
2475b1cc
MS		 404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
405
3a25a8c8
JB		 406 ieee80211_set_default_queues(sdata);
407
4b6f1dd6
JB		 408 ret = drv_add_interface(local, sdata);
409 if (WARN_ON(ret)) {
410 /* ok .. stupid driver, it asked for this! */
411 kfree(sdata);
8b305780 412 return ret;
4b6f1dd6
JB		 413 }
414
a9865538 415 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 416 if (ret) {
417 kfree(sdata);
8b305780 418 return ret;
3a25a8c8
JB		 419 }
420
34a3740d 421 mutex_lock(&local->mtx);
4bf88530 422 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 423 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 424 mutex_unlock(&local->mtx);
55de908a
JB		 425 if (ret) {
426 drv_remove_interface(local, sdata);
427 kfree(sdata);
8b305780 428 return ret;
55de908a
JB		 429 }
430
8b305780 431 mutex_lock(&local->iflist_mtx);
4b6f1dd6 432 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 433 mutex_unlock(&local->iflist_mtx);
8b305780
JB		 434
435 return 0;
4b6f1dd6
JB		 436}
437
3c3e21e7 438void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 439{
440 struct ieee80211_sub_if_data *sdata;
441
442 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
443 return;
444
8b305780
JB		 445 ASSERT_RTNL();
446
685fb72b 447 mutex_lock(&local->iflist_mtx);
4b6f1dd6 448
685fb72b
JB		 449 sdata = rcu_dereference_protected(local->monitor_sdata,
450 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 451 if (!sdata) {
452 mutex_unlock(&local->iflist_mtx);
453 return;
454 }
4b6f1dd6
JB		 455
456 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB		 457 mutex_unlock(&local->iflist_mtx);
458
4b6f1dd6
JB		 459 synchronize_net();
460
34a3740d 461 mutex_lock(&local->mtx);
55de908a 462 ieee80211_vif_release_channel(sdata);
34a3740d 463 mutex_unlock(&local->mtx);
55de908a 464
4b6f1dd6
JB		 465 drv_remove_interface(local, sdata);
466
467 kfree(sdata);
468}
469
34d4bc4d
JB		 470/*
471 * NOTE: Be very careful when changing this function, it must NOT return
472 * an error on interface type changes that have been pre-checked, so most
473 * checks should be in ieee80211_check_concurrent_iface.
474 */
f142c6b9 475int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 476{
f142c6b9
JB		 477 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
478 struct net_device *dev = wdev->netdev;
87490f6d
JB		 479 struct ieee80211_local *local = sdata->local;
480 struct sta_info *sta;
481 u32 changed = 0;
482 int res;
483 u32 hw_reconf_flags = 0;
484
0d143fe1
JB		 485 switch (sdata->vif.type) {
486 case NL80211_IFTYPE_WDS:
487 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
488 return -ENOLINK;
489 break;
665c93a9
JB		 490 case NL80211_IFTYPE_AP_VLAN: {
491 struct ieee80211_sub_if_data *master;
492
0d143fe1
JB		 493 if (!sdata->bss)
494 return -ENOLINK;
665c93a9 495
0d143fe1 496 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 497
498 master = container_of(sdata->bss,
499 struct ieee80211_sub_if_data, u.ap);
500 sdata->control_port_protocol =
501 master->control_port_protocol;
502 sdata->control_port_no_encrypt =
503 master->control_port_no_encrypt;
1351c5d3
JB		 504 sdata->vif.cab_queue = master->vif.cab_queue;
505 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
506 sizeof(sdata->vif.hw_queue));
0d143fe1 507 break;
665c93a9 508 }
0d143fe1
JB		 509 case NL80211_IFTYPE_AP:
510 sdata->bss = &sdata->u.ap;
511 break;
512 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 513 case NL80211_IFTYPE_STATION:
514 case NL80211_IFTYPE_MONITOR:
515 case NL80211_IFTYPE_ADHOC:
f142c6b9 516 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 517 /* no special treatment */
518 break;
519 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 520 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 521 case NL80211_IFTYPE_P2P_CLIENT:
522 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 523 /* cannot happen */
524 WARN_ON(1);
525 break;
526 }
527
528 if (local->open_count == 0) {
24487981 529 res = drv_start(local);
0d143fe1
JB		 530 if (res)
531 goto err_del_bss;
e8975581
JB		 532 /* we're brought up, everything changes */
533 hw_reconf_flags = ~0;
1f87f7d3 534 ieee80211_led_radio(local, true);
67408c8c
JB		 535 ieee80211_mod_tpt_led_trig(local,
536 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 537 }
538
539 /*
bf533e0b
JB		 540 * Copy the hopefully now-present MAC address to
541 * this interface, if it has the special null one.
0d143fe1 542 */
f142c6b9 543 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 544 memcpy(dev->dev_addr,
545 local->hw.wiphy->perm_addr,
546 ETH_ALEN);
547 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
548
549 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 550 res = -EADDRNOTAVAIL;
551 goto err_stop;
0adc23f5 552 }
0d143fe1
JB		 553 }
554
0d143fe1
JB		 555 switch (sdata->vif.type) {
556 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 557 /* no need to tell driver, but set carrier and chanctx */
558 if (rtnl_dereference(sdata->bss->beacon)) {
559 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 560 netif_carrier_on(dev);
4d76d21b 561 } else {
3edaf3e6 562 netif_carrier_off(dev);
4d76d21b 563 }
0d143fe1
JB		 564 break;
565 case NL80211_IFTYPE_MONITOR:
566 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
567 local->cooked_mntrs++;
568 break;
569 }
570
31eba5bc
FF		 571 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
572 res = drv_add_interface(local, sdata);
573 if (res)
574 goto err_stop;
575 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 576 res = ieee80211_add_virtual_monitor(local);
577 if (res)
578 goto err_stop;
579 }
580
0d143fe1
JB		 581 /* must be before the call to ieee80211_configure_filter */
582 local->monitors++;
e8975581 583 if (local->monitors == 1) {
0869aea0
JB		 584 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
585 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 586 }
0d143fe1 587
85416a4f 588 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 589 ieee80211_configure_filter(local);
801d929c
FF		 590 mutex_lock(&local->mtx);
591 ieee80211_recalc_idle(local);
592 mutex_unlock(&local->mtx);
53e9b1de
DG		 593
594 netif_carrier_on(dev);
0d143fe1 595 break;
0d143fe1 596 default:
34d4bc4d 597 if (coming_up) {
075e0847
JB		 598 ieee80211_del_virtual_monitor(local);
599
7b7eab6f 600 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 601 if (res)
602 goto err_stop;
a9865538
JB		 603 res = ieee80211_check_queues(sdata,
604 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 605 if (res)
606 goto err_del_interface;
34d4bc4d 607 }
0d143fe1 608
29cbe68c 609 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 610 local->fif_pspoll++;
7be5086d 611 local->fif_probe_req++;
e3b90ca2 612
e3b90ca2 613 ieee80211_configure_filter(local);
7be5086d
JB		 614 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
615 local->fif_probe_req++;
a3c9aa51 616 }
e3b90ca2 617
f142c6b9
JB		 618 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
619 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 620 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 621
c405c629
JB		 622 switch (sdata->vif.type) {
623 case NL80211_IFTYPE_STATION:
624 case NL80211_IFTYPE_ADHOC:
625 case NL80211_IFTYPE_AP:
626 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 627 netif_carrier_off(dev);
c405c629 628 break;
1411af15 629 case NL80211_IFTYPE_WDS:
f142c6b9 630 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 631 break;
c405c629 632 default:
a2310824
JB		 633 /* not reached */
634 WARN_ON(1);
c405c629 635 }
59034591
EP		 636
637 /*
638 * set default queue parameters so drivers don't
639 * need to initialise the hardware if the hardware
640 * doesn't start up with sane defaults
641 */
3abead59 642 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 643 }
644
2d2080c3
JB		 645 set_bit(SDATA_STATE_RUNNING, &sdata->state);
646
0d143fe1
JB		 647 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
648 /* Create STA entry for the WDS peer */
649 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
650 GFP_KERNEL);
651 if (!sta) {
652 res = -ENOMEM;
653 goto err_del_interface;
654 }
655
83d5cc01
JB		 656 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
657 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
658 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 659
660 res = sta_info_insert(sta);
661 if (res) {
662 /* STA has been freed */
663 goto err_del_interface;
664 }
1be7fe8d
BJ		 665
666 rate_control_rate_init(sta);
1411af15 667 netif_carrier_on(dev);
f142c6b9
JB		 668 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
669 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 670 }
671
0d143fe1
JB		 672 /*
673 * set_multicast_list will be invoked by the networking core
674 * which will check whether any increments here were done in
675 * error and sync them down to the hardware as filter flags.
676 */
677 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
678 atomic_inc(&local->iff_allmultis);
679
680 if (sdata->flags & IEEE80211_SDATA_PROMISC)
681 atomic_inc(&local->iff_promiscs);
682
34d4bc4d
JB		 683 if (coming_up)
684 local->open_count++;
685
59034591 686 if (hw_reconf_flags)
e8975581 687 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 688
10f644a4 689 ieee80211_recalc_ps(local, -1);
965bedad 690
2b436312
JB		 691 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
692 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
693 /* XXX: for AP_VLAN, actually track AP queues */
694 netif_tx_start_all_queues(dev);
695 } else if (dev) {
2b730daa
JB		 696 unsigned long flags;
697 int n_acs = IEEE80211_NUM_ACS;
698 int ac;
699
700 if (local->hw.queues < IEEE80211_NUM_ACS)
701 n_acs = 1;
702
703 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
704 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
705 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
706 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
707 for (ac = 0; ac < n_acs; ac++) {
708 int ac_queue = sdata->vif.hw_queue[ac];
709
710 if (local->queue_stop_reasons[ac_queue] == 0 &&
711 skb_queue_empty(&local->pending[ac_queue]))
712 netif_start_subqueue(dev, ac);
713 }
714 }
715 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
716 }
0d143fe1
JB		 717
718 return 0;
719 err_del_interface:
7b7eab6f 720 drv_remove_interface(local, sdata);
0d143fe1 721 err_stop:
24487981
JB		 722 if (!local->open_count)
723 drv_stop(local);
0d143fe1
JB		 724 err_del_bss:
725 sdata->bss = NULL;
726 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
727 list_del(&sdata->u.vlan.list);
4d6c36fa 728 /* might already be clear but that doesn't matter */
2d2080c3 729 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 730 return res;
731}
732
34d4bc4d 733static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 734{
735 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 736 int err;
737
738 /* fail early if user set an invalid address */
2fcf2824 739 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 740 return -EADDRNOTAVAIL;
741
742 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
743 if (err)
744 return err;
745
f142c6b9 746 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 747}
748
749static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
750 bool going_down)
751{
0d143fe1 752 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 753 unsigned long flags;
754 struct sk_buff *skb, *tmp;
e8975581 755 u32 hw_reconf_flags = 0;
09f4114e 756 int i, flushed;
397a7a24 757 struct ps_data *ps;
d2859df5 758 struct cfg80211_chan_def chandef;
0d143fe1 759
c29acf20
RM		 760 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
761
e2fd5dbc 762 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 763 ieee80211_scan_cancel(local);
764
0d143fe1
JB		 765 /*
766 * Stop TX on this interface first.
767 */
f142c6b9
JB		 768 if (sdata->dev)
769 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 770
c8f994ee 771 ieee80211_roc_purge(local, sdata);
af6b6374 772
572078be
JB		 773 if (sdata->vif.type == NL80211_IFTYPE_STATION)
774 ieee80211_mgd_stop(sdata);
775
cd7760e6
SW		 776 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
777 ieee80211_ibss_stop(sdata);
778
779
0d143fe1
JB		 780 /*
781 * Remove all stations associated with this interface.
782 *
783 * This must be done before calling ops->remove_interface()
784 * because otherwise we can later invoke ops->sta_notify()
785 * whenever the STAs are removed, and that invalidates driver
786 * assumptions about always getting a vif pointer that is valid
787 * (because if we remove a STA after ops->remove_interface()
788 * the driver will have removed the vif info already!)
789 *
09f4114e
JB		 790 * This is relevant only in WDS mode, in all other modes we've
791 * already removed all stations when disconnecting or similar,
792 * so warn otherwise.
0d143fe1 793 */
d34ba216 794 flushed = sta_info_flush(sdata);
09f4114e
JB		 795 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
796 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 797
afdc7c18 798 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 799 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
800 atomic_dec(&local->iff_allmultis);
801
802 if (sdata->flags & IEEE80211_SDATA_PROMISC)
803 atomic_dec(&local->iff_promiscs);
804
7be5086d 805 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 806 local->fif_pspoll--;
7be5086d
JB		 807 local->fif_probe_req--;
808 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
809 local->fif_probe_req--;
810 }
e3b90ca2 811
f142c6b9
JB		 812 if (sdata->dev) {
813 netif_addr_lock_bh(sdata->dev);
814 spin_lock_bh(&local->filter_lock);
815 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
816 sdata->dev->addr_len);
817 spin_unlock_bh(&local->filter_lock);
818 netif_addr_unlock_bh(sdata->dev);
f142c6b9 819 }
3ac64bee 820
7cbf0ba5
VN		 821 del_timer_sync(&local->dynamic_ps_timer);
822 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 823
04ecd257 824 cancel_work_sync(&sdata->recalc_smps);
dbd72850 825 sdata_lock(sdata);
73da7d5b 826 sdata->vif.csa_active = false;
dbd72850 827 sdata_unlock(sdata);
73da7d5b 828 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 829
164eb02d
SW		 830 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
831
832 if (sdata->wdev.cac_started) {
d2859df5 833 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 834 WARN_ON(local->suspended);
34a3740d 835 mutex_lock(&local->mtx);
164eb02d 836 ieee80211_vif_release_channel(sdata);
34a3740d 837 mutex_unlock(&local->mtx);
d2859df5
JD		 838 cfg80211_cac_event(sdata->dev, &chandef,
839 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 840 GFP_KERNEL);
841 }
842
0d143fe1
JB		 843 /* APs need special treatment */
844 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 845 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 846
847 /* down all dependent devices, that is VLANs */
57c9fff3 848 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 849 u.vlan.list)
850 dev_close(vlan->dev);
851 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 852 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
853 /* remove all packets in parent bc_buf pointing to this dev */
854 ps = &sdata->bss->ps;
855
856 spin_lock_irqsave(&ps->bc_buf.lock, flags);
857 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
858 if (skb->dev == sdata->dev) {
859 __skb_unlink(skb, &ps->bc_buf);
860 local->total_ps_buffered--;
861 ieee80211_free_txskb(&local->hw, skb);
862 }
863 }
864 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 865 }
866
34d4bc4d
JB		 867 if (going_down)
868 local->open_count--;
0d143fe1
JB		 869
870 switch (sdata->vif.type) {
871 case NL80211_IFTYPE_AP_VLAN:
872 list_del(&sdata->u.vlan.list);
4d76d21b 873 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 874 /* no need to tell driver */
875 break;
876 case NL80211_IFTYPE_MONITOR:
877 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
878 local->cooked_mntrs--;
879 break;
880 }
881
882 local->monitors--;
e8975581 883 if (local->monitors == 0) {
0869aea0
JB		 884 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
885 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 886 }
0d143fe1 887
85416a4f 888 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 889 break;
f142c6b9
JB		 890 case NL80211_IFTYPE_P2P_DEVICE:
891 /* relies on synchronize_rcu() below */
892 rcu_assign_pointer(local->p2p_sdata, NULL);
893 /* fall through */
0d143fe1 894 default:
0b7dff4f 895 cancel_work_sync(&sdata->work);
35f20c14
JB		 896 /*
897 * When we get here, the interface is marked down.
7907c7d3
JB		 898 * Free the remaining keys, if there are any
899 * (shouldn't be, except maybe in WDS mode?)
75de9113 900 *
7907c7d3
JB		 901 * Force the key freeing to always synchronize_net()
902 * to wait for the RX path in case it is using this
903 * interface enqueuing frames * at this very time on
75de9113 904 * another CPU.
35f20c14 905 */
7907c7d3 906 ieee80211_free_keys(sdata, true);
b9dcf712 907
1861b845
JB		 908 /* fall through */
909 case NL80211_IFTYPE_AP:
910 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 911 }
912
913 sdata->bss = NULL;
914
5061b0c2
JB		 915 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
916 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
917 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
918 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
919 if (info->control.vif == &sdata->vif) {
920 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 921 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 922 }
923 }
924 }
925 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 926
b2c0958b
JB		 927 if (local->open_count == 0)
928 ieee80211_clear_tx_pending(local);
929
930 /*
931 * If the interface goes down while suspended, presumably because
932 * the device was unplugged and that happens before our resume,
933 * then the driver is already unconfigured and the remainder of
934 * this function isn't needed.
935 * XXX: what about WoWLAN? If the device has software state, e.g.
936 * memory allocated, it might expect teardown commands from
937 * mac80211 here?
938 */
939 if (local->suspended) {
940 WARN_ON(local->wowlan);
941 WARN_ON(rtnl_dereference(local->monitor_sdata));
942 return;
943 }
944
945 switch (sdata->vif.type) {
946 case NL80211_IFTYPE_AP_VLAN:
947 break;
948 case NL80211_IFTYPE_MONITOR:
949 if (local->monitors == 0)
950 ieee80211_del_virtual_monitor(local);
951
952 mutex_lock(&local->mtx);
953 ieee80211_recalc_idle(local);
954 mutex_unlock(&local->mtx);
31eba5bc
FF		 955
956 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
957 break;
958
959 /* fall through */
b2c0958b
JB		 960 default:
961 if (going_down)
962 drv_remove_interface(local, sdata);
963 }
964
965 ieee80211_recalc_ps(local, -1);
966
967 if (local->open_count == 0) {
968 ieee80211_stop_device(local);
969
970 /* no reconfiguring after stop! */
971 return;
972 }
973
974 /* do after stop to avoid reconfiguring when we stop anyway */
975 ieee80211_configure_filter(local);
976 ieee80211_hw_config(local, hw_reconf_flags);
977
978 if (local->monitors == local->open_count)
075e0847 979 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 980}
981
982static int ieee80211_stop(struct net_device *dev)
983{
984 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
985
986 ieee80211_do_stop(sdata, true);
5061b0c2 987
0d143fe1
JB		 988 return 0;
989}
990
991static void ieee80211_set_multicast_list(struct net_device *dev)
992{
0d143fe1 993 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 994 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 995 int allmulti, promisc, sdata_allmulti, sdata_promisc;
996
997 allmulti = !!(dev->flags & IFF_ALLMULTI);
998 promisc = !!(dev->flags & IFF_PROMISC);
999 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1000 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1001
1002 if (allmulti != sdata_allmulti) {
1003 if (dev->flags & IFF_ALLMULTI)
1004 atomic_inc(&local->iff_allmultis);
1005 else
1006 atomic_dec(&local->iff_allmultis);
1007 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1008 }
1009
1010 if (promisc != sdata_promisc) {
1011 if (dev->flags & IFF_PROMISC)
1012 atomic_inc(&local->iff_promiscs);
1013 else
1014 atomic_dec(&local->iff_promiscs);
1015 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1016 }
3b8d81e0 1017 spin_lock_bh(&local->filter_lock);
22bedad3 1018 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1019 spin_unlock_bh(&local->filter_lock);
3ac64bee 1020 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1021}
1022
75636525
JB		 1023/*
1024 * Called when the netdev is removed or, by the code below, before
1025 * the interface type changes.
1026 */
f142c6b9 1027static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1028{
1029 int i;
1030
75636525 1031 /* free extra data */
7907c7d3 1032 ieee80211_free_keys(sdata, false);
75636525 1033
aee14ceb
JM		 1034 ieee80211_debugfs_remove_netdev(sdata);
1035
f0706e82 1036 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1037 __skb_queue_purge(&sdata->fragments[i].skb_list);
1038 sdata->fragment_next = 0;
11a843b7 1039
b9dcf712
JB		 1040 if (ieee80211_vif_is_mesh(&sdata->vif))
1041 mesh_rmc_free(sdata);
f0706e82
JB		 1042}
1043
f142c6b9
JB		 1044static void ieee80211_uninit(struct net_device *dev)
1045{
1046 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1047}
1048
cf0277e7 1049static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a
JW		 1050 struct sk_buff *skb,
1051 void *accel_priv)
cf0277e7
JB		 1052{
1053 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1054}
1055
587e729e
JB		 1056static const struct net_device_ops ieee80211_dataif_ops = {
1057 .ndo_open = ieee80211_open,
1058 .ndo_stop = ieee80211_stop,
f142c6b9 1059 .ndo_uninit = ieee80211_uninit,
587e729e 1060 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1061 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1062 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1063 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1064 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1065};
1066
cf0277e7 1067static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a
JW		 1068 struct sk_buff *skb,
1069 void *accel_priv)
cf0277e7
JB		 1070{
1071 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1072 struct ieee80211_local *local = sdata->local;
1073 struct ieee80211_hdr *hdr;
1074 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1075
32c5057b 1076 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1077 return 0;
1078
1079 if (skb->len < 4 ||
b49bb574 1080 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1081 return 0; /* doesn't matter, frame will be dropped */
1082
b49bb574 1083 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1084
00e96dec 1085 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1086}
1087
587e729e
JB		 1088static const struct net_device_ops ieee80211_monitorif_ops = {
1089 .ndo_open = ieee80211_open,
1090 .ndo_stop = ieee80211_stop,
f142c6b9 1091 .ndo_uninit = ieee80211_uninit,
587e729e 1092 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1093 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1094 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1095 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1096 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1097};
1098
1099static void ieee80211_if_setup(struct net_device *dev)
1100{
1101 ether_setup(dev);
550fd08c 1102 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1103 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1104 dev->destructor = free_netdev;
1105}
1106
1fa57d01
JB		 1107static void ieee80211_iface_work(struct work_struct *work)
1108{
1109 struct ieee80211_sub_if_data *sdata =
1110 container_of(work, struct ieee80211_sub_if_data, work);
1111 struct ieee80211_local *local = sdata->local;
1112 struct sk_buff *skb;
344eec67 1113 struct sta_info *sta;
c1475ca9 1114 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1115
1116 if (!ieee80211_sdata_running(sdata))
1117 return;
1118
1119 if (local->scanning)
1120 return;
1121
1122 /*
1123 * ieee80211_queue_work() should have picked up most cases,
1124 * here we'll pick the rest.
1125 */
1126 if (WARN(local->suspended,
1127 "interface work scheduled while going to suspend\n"))
1128 return;
1129
1130 /* first process frames */
1131 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1132 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1133
c1475ca9
JB		 1134 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1135 ra_tid = (void *)&skb->cb;
1136 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1137 ra_tid->tid);
1138 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1139 ra_tid = (void *)&skb->cb;
1140 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1141 ra_tid->tid);
1142 } else if (ieee80211_is_action(mgmt->frame_control) &&
1143 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1144 int len = skb->len;
bed7ee6e 1145
a93e3644 1146 mutex_lock(&local->sta_mtx);
875ae5f6 1147 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1148 if (sta) {
1149 switch (mgmt->u.action.u.addba_req.action_code) {
1150 case WLAN_ACTION_ADDBA_REQ:
1151 ieee80211_process_addba_request(
1152 local, sta, mgmt, len);
1153 break;
1154 case WLAN_ACTION_ADDBA_RESP:
1155 ieee80211_process_addba_resp(local, sta,
1156 mgmt, len);
1157 break;
1158 case WLAN_ACTION_DELBA:
1159 ieee80211_process_delba(sdata, sta,
1160 mgmt, len);
1161 break;
1162 default:
1163 WARN_ON(1);
1164 break;
1165 }
1166 }
a93e3644 1167 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1168 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1169 struct ieee80211_hdr *hdr = (void *)mgmt;
1170 /*
1171 * So the frame isn't mgmt, but frame_control
1172 * is at the right place anyway, of course, so
1173 * the if statement is correct.
1174 *
1175 * Warn if we have other data frame types here,
1176 * they must not get here.
1177 */
1178 WARN_ON(hdr->frame_control &
1179 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1180 WARN_ON(!(hdr->seq_ctrl &
1181 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1182 /*
1183 * This was a fragment of a frame, received while
1184 * a block-ack session was active. That cannot be
1185 * right, so terminate the session.
1186 */
a93e3644 1187 mutex_lock(&local->sta_mtx);
875ae5f6 1188 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1189 if (sta) {
1190 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1191 IEEE80211_QOS_CTL_TID_MASK;
1192
1193 __ieee80211_stop_rx_ba_session(
1194 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1195 WLAN_REASON_QSTA_REQUIRE_SETUP,
1196 true);
344eec67 1197 }
a93e3644 1198 mutex_unlock(&local->sta_mtx);
bed7ee6e 1199 } else switch (sdata->vif.type) {
1fa57d01
JB		 1200 case NL80211_IFTYPE_STATION:
1201 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1202 break;
1203 case NL80211_IFTYPE_ADHOC:
1204 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1205 break;
1206 case NL80211_IFTYPE_MESH_POINT:
1207 if (!ieee80211_vif_is_mesh(&sdata->vif))
1208 break;
1209 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1210 break;
1211 default:
1212 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1213 break;
1214 }
36b3a628
JB		 1215
1216 kfree_skb(skb);
1fa57d01
JB		 1217 }
1218
1219 /* then other type-dependent work */
1220 switch (sdata->vif.type) {
1221 case NL80211_IFTYPE_STATION:
1222 ieee80211_sta_work(sdata);
1223 break;
1224 case NL80211_IFTYPE_ADHOC:
1225 ieee80211_ibss_work(sdata);
1226 break;
1227 case NL80211_IFTYPE_MESH_POINT:
1228 if (!ieee80211_vif_is_mesh(&sdata->vif))
1229 break;
1230 ieee80211_mesh_work(sdata);
1231 break;
1232 default:
1233 break;
1234 }
1235}
1236
04ecd257
JB		 1237static void ieee80211_recalc_smps_work(struct work_struct *work)
1238{
1239 struct ieee80211_sub_if_data *sdata =
1240 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1241
1242 ieee80211_recalc_smps(sdata);
1243}
1fa57d01 1244
75636525
JB		 1245/*
1246 * Helper function to initialise an interface to a specific type.
1247 */
1248static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1249 enum nl80211_iftype type)
f0706e82 1250{
75636525
JB		 1251 /* clear type-dependent union */
1252 memset(&sdata->u, 0, sizeof(sdata->u));
1253
1254 /* and set some type-dependent values */
1255 sdata->vif.type = type;
2ca27bcf 1256 sdata->vif.p2p = false;
60719ffd 1257 sdata->wdev.iftype = type;
75636525 1258
a621fa4d
JB		 1259 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1260 sdata->control_port_no_encrypt = false;
2475b1cc 1261 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1262
b53be792
SW		 1263 sdata->noack_map = 0;
1264
f142c6b9
JB		 1265 /* only monitor/p2p-device differ */
1266 if (sdata->dev) {
1267 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1268 sdata->dev->type = ARPHRD_ETHER;
1269 }
75636525 1270
35f20c14 1271 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1272 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1273 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1274 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1275
75636525 1276 switch (type) {
2ca27bcf
JB		 1277 case NL80211_IFTYPE_P2P_GO:
1278 type = NL80211_IFTYPE_AP;
1279 sdata->vif.type = type;
1280 sdata->vif.p2p = true;
1281 /* fall through */
05c914fe 1282 case NL80211_IFTYPE_AP:
d012a605 1283 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1284 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1285 INIT_WORK(&sdata->u.ap.request_smps_work,
1286 ieee80211_request_smps_ap_work);
ad2d223a 1287 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1288 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1289 break;
2ca27bcf
JB		 1290 case NL80211_IFTYPE_P2P_CLIENT:
1291 type = NL80211_IFTYPE_STATION;
1292 sdata->vif.type = type;
1293 sdata->vif.p2p = true;
1294 /* fall through */
05c914fe 1295 case NL80211_IFTYPE_STATION:
ad2d223a 1296 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1297 ieee80211_sta_setup_sdata(sdata);
472dbc45 1298 break;
46900298 1299 case NL80211_IFTYPE_ADHOC:
ad2d223a 1300 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1301 ieee80211_ibss_setup_sdata(sdata);
1302 break;
05c914fe 1303 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1304 if (ieee80211_vif_is_mesh(&sdata->vif))
1305 ieee80211_mesh_init_sdata(sdata);
1306 break;
05c914fe 1307 case NL80211_IFTYPE_MONITOR:
75636525 1308 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1309 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1310 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1311 MONITOR_FLAG_OTHER_BSS;
1312 break;
05c914fe 1313 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1314 sdata->vif.bss_conf.bssid = NULL;
1315 break;
05c914fe 1316 case NL80211_IFTYPE_AP_VLAN:
98104fde 1317 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1318 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1319 break;
05c914fe 1320 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1321 case NUM_NL80211_IFTYPES:
75636525
JB		 1322 BUG();
1323 break;
1324 }
1325
1326 ieee80211_debugfs_add_netdev(sdata);
1327}
1328
34d4bc4d
JB		 1329static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1330 enum nl80211_iftype type)
1331{
1332 struct ieee80211_local *local = sdata->local;
1333 int ret, err;
2ca27bcf
JB		 1334 enum nl80211_iftype internal_type = type;
1335 bool p2p = false;
34d4bc4d
JB		 1336
1337 ASSERT_RTNL();
1338
1339 if (!local->ops->change_interface)
1340 return -EBUSY;
1341
1342 switch (sdata->vif.type) {
1343 case NL80211_IFTYPE_AP:
1344 case NL80211_IFTYPE_STATION:
1345 case NL80211_IFTYPE_ADHOC:
1346 /*
1347 * Could maybe also all others here?
1348 * Just not sure how that interacts
1349 * with the RX/config path e.g. for
1350 * mesh.
1351 */
1352 break;
1353 default:
1354 return -EBUSY;
1355 }
1356
1357 switch (type) {
1358 case NL80211_IFTYPE_AP:
1359 case NL80211_IFTYPE_STATION:
1360 case NL80211_IFTYPE_ADHOC:
1361 /*
1362 * Could probably support everything
1363 * but WDS here (WDS do_open can fail
1364 * under memory pressure, which this
1365 * code isn't prepared to handle).
1366 */
1367 break;
2ca27bcf
JB		 1368 case NL80211_IFTYPE_P2P_CLIENT:
1369 p2p = true;
1370 internal_type = NL80211_IFTYPE_STATION;
1371 break;
1372 case NL80211_IFTYPE_P2P_GO:
1373 p2p = true;
1374 internal_type = NL80211_IFTYPE_AP;
1375 break;
34d4bc4d
JB		 1376 default:
1377 return -EBUSY;
1378 }
1379
2ca27bcf 1380 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1381 if (ret)
1382 return ret;
1383
1384 ieee80211_do_stop(sdata, false);
1385
f142c6b9 1386 ieee80211_teardown_sdata(sdata);
34d4bc4d 1387
2ca27bcf 1388 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1389 if (ret)
a9865538 1390 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1391
3a25a8c8
JB		 1392 /*
1393 * Ignore return value here, there's not much we can do since
1394 * the driver changed the interface type internally already.
1395 * The warnings will hopefully make driver authors fix it :-)
1396 */
a9865538 1397 ieee80211_check_queues(sdata, type);
3a25a8c8 1398
34d4bc4d
JB		 1399 ieee80211_setup_sdata(sdata, type);
1400
f142c6b9 1401 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1402 WARN(err, "type change: do_open returned %d", err);
1403
1404 return ret;
1405}
1406
f3947e2d 1407int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1408 enum nl80211_iftype type)
75636525 1409{
34d4bc4d
JB		 1410 int ret;
1411
f3947e2d
JB		 1412 ASSERT_RTNL();
1413
2ca27bcf 1414 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1415 return 0;
1416
34d4bc4d
JB		 1417 if (ieee80211_sdata_running(sdata)) {
1418 ret = ieee80211_runtime_change_iftype(sdata, type);
1419 if (ret)
1420 return ret;
1421 } else {
1422 /* Purge and reset type-dependent state. */
f142c6b9 1423 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1424 ieee80211_setup_sdata(sdata, type);
1425 }
75636525
JB		 1426
1427 /* reset some values that shouldn't be kept across type changes */
75636525 1428 sdata->drop_unencrypted = 0;
9bc383de
JB		 1429 if (type == NL80211_IFTYPE_STATION)
1430 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1431
1432 return 0;
f0706e82
JB		 1433}
1434
fa9029f8 1435static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1436 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1437{
1438 struct ieee80211_sub_if_data *sdata;
1439 u64 mask, start, addr, val, inc;
1440 u8 *m;
1441 u8 tmp_addr[ETH_ALEN];
1442 int i;
1443
1444 /* default ... something at least */
f142c6b9 1445 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1446
1447 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1448 local->hw.wiphy->n_addresses <= 1)
1449 return;
1450
fa9029f8
JB		 1451 mutex_lock(&local->iflist_mtx);
1452
1453 switch (type) {
1454 case NL80211_IFTYPE_MONITOR:
1455 /* doesn't matter */
1456 break;
1457 case NL80211_IFTYPE_WDS:
1458 case NL80211_IFTYPE_AP_VLAN:
1459 /* match up with an AP interface */
1460 list_for_each_entry(sdata, &local->interfaces, list) {
1461 if (sdata->vif.type != NL80211_IFTYPE_AP)
1462 continue;
f142c6b9 1463 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1464 break;
1465 }
1466 /* keep default if no AP interface present */
1467 break;
6d71117a
JB		 1468 case NL80211_IFTYPE_P2P_CLIENT:
1469 case NL80211_IFTYPE_P2P_GO:
1470 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1471 list_for_each_entry(sdata, &local->interfaces, list) {
1472 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1473 continue;
1474 if (!ieee80211_sdata_running(sdata))
1475 continue;
1476 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1477 goto out_unlock;
1478 }
1479 }
1480 /* otherwise fall through */
fa9029f8
JB		 1481 default:
1482 /* assign a new address if possible -- try n_addresses first */
1483 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1484 bool used = false;
1485
1486 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1487 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1488 sdata->vif.addr)) {
fa9029f8
JB		 1489 used = true;
1490 break;
1491 }
1492 }
1493
1494 if (!used) {
f142c6b9 1495 memcpy(perm_addr,
fa9029f8
JB		 1496 local->hw.wiphy->addresses[i].addr,
1497 ETH_ALEN);
1498 break;
1499 }
1500 }
1501
1502 /* try mask if available */
1503 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1504 break;
1505
1506 m = local->hw.wiphy->addr_mask;
1507 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1508 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1509 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1510
1511 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1512 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1513 pr_info("not contiguous\n");
fa9029f8
JB		 1514 break;
1515 }
1516
ac20976d
HS		 1517 /*
1518 * Pick address of existing interface in case user changed
1519 * MAC address manually, default to perm_addr.
1520 */
fa9029f8 1521 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1522 list_for_each_entry(sdata, &local->interfaces, list) {
1523 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1524 continue;
1525 m = sdata->vif.addr;
1526 break;
1527 }
fa9029f8
JB		 1528 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1529 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1530 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1531
1532 inc = 1ULL<<__ffs64(mask);
1533 val = (start & mask);
1534 addr = (start & ~mask) | (val & mask);
1535 do {
1536 bool used = false;
1537
1538 tmp_addr[5] = addr >> 0*8;
1539 tmp_addr[4] = addr >> 1*8;
1540 tmp_addr[3] = addr >> 2*8;
1541 tmp_addr[2] = addr >> 3*8;
1542 tmp_addr[1] = addr >> 4*8;
1543 tmp_addr[0] = addr >> 5*8;
1544
1545 val += inc;
1546
1547 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1548 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1549 used = true;
1550 break;
1551 }
1552 }
1553
1554 if (!used) {
f142c6b9 1555 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1556 break;
1557 }
1558 addr = (start & ~mask) | (val & mask);
1559 } while (addr != start);
1560
1561 break;
1562 }
1563
6d71117a 1564 out_unlock:
fa9029f8
JB		 1565 mutex_unlock(&local->iflist_mtx);
1566}
1567
3e122be0 1568int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1569 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1570 struct vif_params *params)
f0706e82 1571{
f142c6b9 1572 struct net_device *ndev = NULL;
f0706e82 1573 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1574 int ret, i;
ded81f6b 1575 int txqs = 1;
f0706e82
JB		 1576
1577 ASSERT_RTNL();
75636525 1578
f142c6b9
JB		 1579 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1580 struct wireless_dev *wdev;
1581
1582 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1583 GFP_KERNEL);
1584 if (!sdata)
1585 return -ENOMEM;
1586 wdev = &sdata->wdev;
1587
1588 sdata->dev = NULL;
1589 strlcpy(sdata->name, name, IFNAMSIZ);
1590 ieee80211_assign_perm_addr(local, wdev->address, type);
1591 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1592 } else {
1593 if (local->hw.queues >= IEEE80211_NUM_ACS)
1594 txqs = IEEE80211_NUM_ACS;
1595
1596 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1597 local->hw.vif_data_size,
1598 name, ieee80211_if_setup, txqs, 1);
1599 if (!ndev)
1600 return -ENOMEM;
1601 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1602
1603 ndev->needed_headroom = local->tx_headroom +
1604 4*6 /* four MAC addresses */
1605 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1606 + 6 /* mesh */
1607 + 8 /* rfc1042/bridge tunnel */
1608 - ETH_HLEN /* ethernet hard_header_len */
1609 + IEEE80211_ENCRYPT_HEADROOM;
1610 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1611
1612 ret = dev_alloc_name(ndev, ndev->name);
1613 if (ret < 0) {
1614 free_netdev(ndev);
1615 return ret;
1616 }
1617
1618 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1619 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1620 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1621
1622 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1623 sdata = netdev_priv(ndev);
1624 ndev->ieee80211_ptr = &sdata->wdev;
1625 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1626 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1627
1628 sdata->dev = ndev;
1629 }
75636525
JB		 1630
1631 /* initialise type-independent data */
f0706e82 1632 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1633 sdata->local = local;
75636525
JB		 1634
1635 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1636 skb_queue_head_init(&sdata->fragments[i].skb_list);
1637
1638 INIT_LIST_HEAD(&sdata->key_list);
1639
164eb02d
SW		 1640 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1641 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1642 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1643 ieee80211_delayed_tailroom_dec);
97f97b1f 1644
37eb0b16
JM		 1645 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1646 struct ieee80211_supported_band *sband;
1647 sband = local->hw.wiphy->bands[i];
1648 sdata->rc_rateidx_mask[i] =
1649 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1650 if (sband)
1651 memcpy(sdata->rc_rateidx_mcs_mask[i],
1652 sband->ht_cap.mcs.rx_mask,
1653 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1654 else
1655 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1656 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1657 }
75636525 1658
3a25a8c8
JB		 1659 ieee80211_set_default_queues(sdata);
1660
1ea6f9c0
JB		 1661 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1662 sdata->user_power_level = local->user_power_level;
1663
2475b1cc
MS		 1664 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1665
75636525
JB		 1666 /* setup type-dependent data */
1667 ieee80211_setup_sdata(sdata, type);
f0706e82 1668
f142c6b9
JB		 1669 if (ndev) {
1670 if (params) {
1671 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1672 if (type == NL80211_IFTYPE_STATION)
1673 sdata->u.mgd.use_4addr = params->use_4addr;
1674 }
9bc383de 1675
f142c6b9 1676 ndev->features |= local->hw.netdev_features;
72d78728 1677
f142c6b9
JB		 1678 ret = register_netdevice(ndev);
1679 if (ret) {
1680 free_netdev(ndev);
1681 return ret;
1682 }
1683 }
f0706e82 1684
c771c9d8 1685 mutex_lock(&local->iflist_mtx);
79010420 1686 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1687 mutex_unlock(&local->iflist_mtx);
79010420 1688
84efbb84
JB		 1689 if (new_wdev)
1690 *new_wdev = &sdata->wdev;
f0706e82 1691
f0706e82 1692 return 0;
f0706e82
JB		 1693}
1694
f698d856 1695void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1696{
f0706e82 1697 ASSERT_RTNL();
11a843b7 1698
c771c9d8 1699 mutex_lock(&sdata->local->iflist_mtx);
75636525 1700 list_del_rcu(&sdata->list);
c771c9d8
JB		 1701 mutex_unlock(&sdata->local->iflist_mtx);
1702
75636525 1703 synchronize_rcu();
f142c6b9
JB		 1704
1705 if (sdata->dev) {
1706 unregister_netdevice(sdata->dev);
1707 } else {
1708 cfg80211_unregister_wdev(&sdata->wdev);
1709 kfree(sdata);
1710 }
1711}
1712
1713void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1714{
1715 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1716 return;
1717 ieee80211_do_stop(sdata, true);
1718 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1719}
1720
75636525
JB		 1721/*
1722 * Remove all interfaces, may only be called at hardware unregistration
1723 * time because it doesn't do RCU-safe list removals.
1724 */
1725void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1726{
75636525 1727 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1728 LIST_HEAD(unreg_list);
f142c6b9 1729 LIST_HEAD(wdev_list);
f0706e82
JB		 1730
1731 ASSERT_RTNL();
1732
c8aa22db
JB		 1733 /*
1734 * Close all AP_VLAN interfaces first, as otherwise they
1735 * might be closed while the AP interface they belong to
1736 * is closed, causing unregister_netdevice_many() to crash.
1737 */
1738 list_for_each_entry(sdata, &local->interfaces, list)
1739 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1740 dev_close(sdata->dev);
1741
efe117ab 1742 mutex_lock(&local->iflist_mtx);
75636525
JB		 1743 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1744 list_del(&sdata->list);
c771c9d8 1745
f142c6b9
JB		 1746 if (sdata->dev)
1747 unregister_netdevice_queue(sdata->dev, &unreg_list);
1748 else
1749 list_add(&sdata->list, &wdev_list);
f0706e82 1750 }
efe117ab
ED		 1751 mutex_unlock(&local->iflist_mtx);
1752 unregister_netdevice_many(&unreg_list);
5f04d506 1753 list_del(&unreg_list);
f142c6b9
JB		 1754
1755 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1756 list_del(&sdata->list);
1757 cfg80211_unregister_wdev(&sdata->wdev);
1758 kfree(sdata);
1759 }
f0706e82 1760}
5cff20e6 1761
47846c9b 1762static int netdev_notify(struct notifier_block *nb,
351638e7 1763 unsigned long state, void *ptr)
47846c9b 1764{
351638e7 1765 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1766 struct ieee80211_sub_if_data *sdata;
1767
1768 if (state != NETDEV_CHANGENAME)
1769 return 0;
1770
1771 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1772 return 0;
1773
1774 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1775 return 0;
1776
1777 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1778
2f5265e6 1779 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1780
1781 ieee80211_debugfs_rename_netdev(sdata);
1782 return 0;
1783}
1784
1785static struct notifier_block mac80211_netdev_notifier = {
1786 .notifier_call = netdev_notify,
1787};
1788
1789int ieee80211_iface_init(void)
1790{
1791 return register_netdevice_notifier(&mac80211_netdev_notifier);
1792}
1793
1794void ieee80211_iface_exit(void)
1795{
1796 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1797}
Ubuntu Hirsute Linux kernel mirror