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Merge tag 'at91-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
c5d54fbf 2 * Interface handling
0d143fe1 3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
d98ad83e 8 * Copyright 2013-2014 Intel Mobile Communications GmbH
f0706e82
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
5a0e3ad6 14#include <linux/slab.h>
f0706e82
JB		 15#include <linux/kernel.h>
16#include <linux/if_arp.h>
17#include <linux/netdevice.h>
18#include <linux/rtnetlink.h>
19#include <net/mac80211.h>
cf0277e7 20#include <net/ieee80211_radiotap.h>
f0706e82
JB		 21#include "ieee80211_i.h"
22#include "sta_info.h"
e9f207f0 23#include "debugfs_netdev.h"
ee385855 24#include "mesh.h"
0d143fe1 25#include "led.h"
24487981 26#include "driver-ops.h"
cf0277e7 27#include "wme.h"
1be7fe8d 28#include "rate.h"
0d143fe1 29
c771c9d8
JB		 30/**
31 * DOC: Interface list locking
32 *
33 * The interface list in each struct ieee80211_local is protected
34 * three-fold:
35 *
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
38 * the iflist_mtx.
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
41 *
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
44 */
45
1ea6f9c0
JB		 46bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47{
48 struct ieee80211_chanctx_conf *chanctx_conf;
49 int power;
50
51 rcu_read_lock();
52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
53 if (!chanctx_conf) {
54 rcu_read_unlock();
55 return false;
56 }
57
0430c883 58 power = ieee80211_chandef_max_power(&chanctx_conf->def);
1ea6f9c0
JB		 59 rcu_read_unlock();
60
61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
62 power = min(power, sdata->user_power_level);
63
64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->ap_power_level);
66
67 if (power != sdata->vif.bss_conf.txpower) {
68 sdata->vif.bss_conf.txpower = power;
69 ieee80211_hw_config(sdata->local, 0);
70 return true;
71 }
72
73 return false;
74}
75
76void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
77{
78 if (__ieee80211_recalc_txpower(sdata))
79 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
80}
c771c9d8 81
62a40a15 82static u32 __ieee80211_idle_off(struct ieee80211_local *local)
cc45ae54
JB		 83{
84 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
85 return 0;
86
87 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
88 return IEEE80211_CONF_CHANGE_IDLE;
89}
90
62a40a15 91static u32 __ieee80211_idle_on(struct ieee80211_local *local)
cc45ae54
JB		 92{
93 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
94 return 0;
95
39ecc01d 96 ieee80211_flush_queues(local, NULL);
cc45ae54
JB		 97
98 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
99 return IEEE80211_CONF_CHANGE_IDLE;
100}
101
62a40a15
JB		 102static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
103 bool force_active)
cc45ae54 104{
1d5e1266 105 bool working, scanning, active;
cc45ae54 106 unsigned int led_trig_start = 0, led_trig_stop = 0;
cc45ae54 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 113
1d5e1266
JB		 114 working = !local->ops->remain_on_channel &&
115 !list_empty(&local->roc_list);
cc45ae54 116
f1e3e051
JB		 117 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
118 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
cc45ae54 119
cc45ae54
JB		 120 if (working || scanning)
121 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
122 else
123 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
124
fd0f979a 125 if (active)
cc45ae54
JB		 126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
127 else
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
129
130 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
131
fd0f979a 132 if (working || scanning || active)
62a40a15
JB		 133 return __ieee80211_idle_off(local);
134 return __ieee80211_idle_on(local);
135}
136
137u32 ieee80211_idle_off(struct ieee80211_local *local)
138{
139 return __ieee80211_recalc_idle(local, true);
140}
141
142void ieee80211_recalc_idle(struct ieee80211_local *local)
143{
144 u32 change = __ieee80211_recalc_idle(local, false);
fd0f979a
JB		 145 if (change)
146 ieee80211_hw_config(local, change);
cc45ae54
JB		 147}
148
0d143fe1
JB		 149static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
150{
09b1426e 151 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
0d143fe1 152 return -EINVAL;
0d143fe1 153
0d143fe1
JB		 154 dev->mtu = new_mtu;
155 return 0;
156}
157
3899ba90 158static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
31eba5bc 159 bool check_dup)
478622e8 160{
ac20976d
HS		 161 struct ieee80211_local *local = sdata->local;
162 struct ieee80211_sub_if_data *iter;
478622e8
HS		 163 u64 new, mask, tmp;
164 u8 *m;
165 int ret = 0;
166
167 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
168 return 0;
169
170 m = addr;
171 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
174
175 m = local->hw.wiphy->addr_mask;
176 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179
31eba5bc
FF		 180 if (!check_dup)
181 return ret;
478622e8
HS		 182
183 mutex_lock(&local->iflist_mtx);
ac20976d
HS		 184 list_for_each_entry(iter, &local->interfaces, list) {
185 if (iter == sdata)
478622e8
HS		 186 continue;
187
3899ba90
JL		 188 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
189 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
478622e8
HS		 190 continue;
191
ac20976d 192 m = iter->vif.addr;
478622e8
HS		 193 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
194 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
195 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
196
197 if ((new & ~mask) != (tmp & ~mask)) {
198 ret = -EINVAL;
199 break;
200 }
201 }
202 mutex_unlock(&local->iflist_mtx);
203
204 return ret;
205}
206
47846c9b
JB		 207static int ieee80211_change_mac(struct net_device *dev, void *addr)
208{
209 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 210 struct sockaddr *sa = addr;
31eba5bc 211 bool check_dup = true;
47846c9b
JB		 212 int ret;
213
9607e6b6 214 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 215 return -EBUSY;
216
31eba5bc
FF		 217 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
218 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
219 check_dup = false;
220
3899ba90 221 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
478622e8
HS		 222 if (ret)
223 return ret;
224
fc5f7577 225 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 226
227 if (ret == 0)
fc5f7577 228 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 229
230 return ret;
231}
232
0d143fe1
JB		 233static inline int identical_mac_addr_allowed(int type1, int type2)
234{
235 return type1 == NL80211_IFTYPE_MONITOR ||
236 type2 == NL80211_IFTYPE_MONITOR ||
f142c6b9
JB		 237 type1 == NL80211_IFTYPE_P2P_DEVICE ||
238 type2 == NL80211_IFTYPE_P2P_DEVICE ||
0d143fe1
JB		 239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
240 (type1 == NL80211_IFTYPE_WDS &&
241 (type2 == NL80211_IFTYPE_WDS ||
242 type2 == NL80211_IFTYPE_AP)) ||
243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
244 (type1 == NL80211_IFTYPE_AP_VLAN &&
245 (type2 == NL80211_IFTYPE_AP ||
246 type2 == NL80211_IFTYPE_AP_VLAN));
247}
248
87490f6d
JB		 249static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
250 enum nl80211_iftype iftype)
0d143fe1 251{
b4a4bf5d 252 struct ieee80211_local *local = sdata->local;
87490f6d 253 struct ieee80211_sub_if_data *nsdata;
b6a55015 254 int ret;
0d143fe1 255
87490f6d 256 ASSERT_RTNL();
0d143fe1
JB		 257
258 /* we hold the RTNL here so can safely walk the list */
259 list_for_each_entry(nsdata, &local->interfaces, list) {
371a255e 260 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 261 /*
262 * Allow only a single IBSS interface to be up at any
263 * time. This is restricted because beacon distribution
264 * cannot work properly if both are in the same IBSS.
265 *
266 * To remove this restriction we'd have to disallow them
267 * from setting the same SSID on different IBSS interfaces
268 * belonging to the same hardware. Then, however, we're
269 * faced with having to adopt two different TSF timers...
270 */
87490f6d 271 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB		 272 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
273 return -EBUSY;
73da7d5b
SW		 274 /*
275 * will not add another interface while any channel
276 * switch is active.
277 */
278 if (nsdata->vif.csa_active)
279 return -EBUSY;
0d143fe1
JB		 280
281 /*
282 * The remaining checks are only performed for interfaces
283 * with the same MAC address.
284 */
371a255e
JB		 285 if (!ether_addr_equal(sdata->vif.addr,
286 nsdata->vif.addr))
0d143fe1
JB		 287 continue;
288
289 /*
290 * check whether it may have the same address
291 */
87490f6d 292 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB		 293 nsdata->vif.type))
294 return -ENOTUNIQ;
295
296 /*
297 * can only add VLANs to enabled APs
298 */
87490f6d 299 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB		 300 nsdata->vif.type == NL80211_IFTYPE_AP)
301 sdata->bss = &nsdata->u.ap;
302 }
303 }
304
b6a55015
LC		 305 mutex_lock(&local->chanctx_mtx);
306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
307 mutex_unlock(&local->chanctx_mtx);
308 return ret;
87490f6d
JB		 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));
34171dc0 403 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
4b6f1dd6 404
2475b1cc
MS		 405 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
406
3a25a8c8
JB		 407 ieee80211_set_default_queues(sdata);
408
4b6f1dd6
JB		 409 ret = drv_add_interface(local, sdata);
410 if (WARN_ON(ret)) {
411 /* ok .. stupid driver, it asked for this! */
412 kfree(sdata);
8b305780 413 return ret;
4b6f1dd6
JB		 414 }
415
a9865538 416 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 417 if (ret) {
418 kfree(sdata);
8b305780 419 return ret;
3a25a8c8
JB		 420 }
421
fab57a6c
JB		 422 mutex_lock(&local->iflist_mtx);
423 rcu_assign_pointer(local->monitor_sdata, sdata);
424 mutex_unlock(&local->iflist_mtx);
425
34a3740d 426 mutex_lock(&local->mtx);
4bf88530 427 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a 428 IEEE80211_CHANCTX_EXCLUSIVE);
34a3740d 429 mutex_unlock(&local->mtx);
55de908a 430 if (ret) {
fab57a6c 431 mutex_lock(&local->iflist_mtx);
0c2bef46 432 RCU_INIT_POINTER(local->monitor_sdata, NULL);
fab57a6c
JB		 433 mutex_unlock(&local->iflist_mtx);
434 synchronize_net();
55de908a
JB		 435 drv_remove_interface(local, sdata);
436 kfree(sdata);
8b305780 437 return ret;
55de908a
JB		 438 }
439
8b305780 440 return 0;
4b6f1dd6
JB		 441}
442
3c3e21e7 443void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 444{
445 struct ieee80211_sub_if_data *sdata;
446
447 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
448 return;
449
8b305780
JB		 450 ASSERT_RTNL();
451
685fb72b 452 mutex_lock(&local->iflist_mtx);
4b6f1dd6 453
685fb72b
JB		 454 sdata = rcu_dereference_protected(local->monitor_sdata,
455 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 456 if (!sdata) {
457 mutex_unlock(&local->iflist_mtx);
458 return;
459 }
4b6f1dd6 460
0c2bef46 461 RCU_INIT_POINTER(local->monitor_sdata, NULL);
8b305780
JB		 462 mutex_unlock(&local->iflist_mtx);
463
4b6f1dd6
JB		 464 synchronize_net();
465
34a3740d 466 mutex_lock(&local->mtx);
55de908a 467 ieee80211_vif_release_channel(sdata);
34a3740d 468 mutex_unlock(&local->mtx);
55de908a 469
4b6f1dd6
JB		 470 drv_remove_interface(local, sdata);
471
472 kfree(sdata);
473}
474
34d4bc4d
JB		 475/*
476 * NOTE: Be very careful when changing this function, it must NOT return
477 * an error on interface type changes that have been pre-checked, so most
478 * checks should be in ieee80211_check_concurrent_iface.
479 */
f142c6b9 480int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 481{
f142c6b9
JB		 482 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
483 struct net_device *dev = wdev->netdev;
87490f6d
JB		 484 struct ieee80211_local *local = sdata->local;
485 struct sta_info *sta;
486 u32 changed = 0;
487 int res;
488 u32 hw_reconf_flags = 0;
489
0d143fe1
JB		 490 switch (sdata->vif.type) {
491 case NL80211_IFTYPE_WDS:
492 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
493 return -ENOLINK;
494 break;
665c93a9
JB		 495 case NL80211_IFTYPE_AP_VLAN: {
496 struct ieee80211_sub_if_data *master;
497
0d143fe1
JB		 498 if (!sdata->bss)
499 return -ENOLINK;
665c93a9 500
4e141dad 501 mutex_lock(&local->mtx);
0d143fe1 502 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
4e141dad 503 mutex_unlock(&local->mtx);
665c93a9
JB		 504
505 master = container_of(sdata->bss,
506 struct ieee80211_sub_if_data, u.ap);
507 sdata->control_port_protocol =
508 master->control_port_protocol;
509 sdata->control_port_no_encrypt =
510 master->control_port_no_encrypt;
1351c5d3
JB		 511 sdata->vif.cab_queue = master->vif.cab_queue;
512 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
513 sizeof(sdata->vif.hw_queue));
0d143fe1 514 break;
665c93a9 515 }
0d143fe1
JB		 516 case NL80211_IFTYPE_AP:
517 sdata->bss = &sdata->u.ap;
518 break;
519 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 520 case NL80211_IFTYPE_STATION:
521 case NL80211_IFTYPE_MONITOR:
522 case NL80211_IFTYPE_ADHOC:
f142c6b9 523 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 524 /* no special treatment */
525 break;
526 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 527 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 528 case NL80211_IFTYPE_P2P_CLIENT:
529 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 530 /* cannot happen */
531 WARN_ON(1);
532 break;
533 }
534
535 if (local->open_count == 0) {
24487981 536 res = drv_start(local);
0d143fe1
JB		 537 if (res)
538 goto err_del_bss;
e8975581
JB		 539 /* we're brought up, everything changes */
540 hw_reconf_flags = ~0;
1f87f7d3 541 ieee80211_led_radio(local, true);
67408c8c
JB		 542 ieee80211_mod_tpt_led_trig(local,
543 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 544 }
545
546 /*
bf533e0b
JB		 547 * Copy the hopefully now-present MAC address to
548 * this interface, if it has the special null one.
0d143fe1 549 */
f142c6b9 550 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 551 memcpy(dev->dev_addr,
552 local->hw.wiphy->perm_addr,
553 ETH_ALEN);
554 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
555
556 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 557 res = -EADDRNOTAVAIL;
558 goto err_stop;
0adc23f5 559 }
0d143fe1
JB		 560 }
561
0d143fe1
JB		 562 switch (sdata->vif.type) {
563 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 564 /* no need to tell driver, but set carrier and chanctx */
565 if (rtnl_dereference(sdata->bss->beacon)) {
566 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 567 netif_carrier_on(dev);
4d76d21b 568 } else {
3edaf3e6 569 netif_carrier_off(dev);
4d76d21b 570 }
0d143fe1
JB		 571 break;
572 case NL80211_IFTYPE_MONITOR:
573 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
574 local->cooked_mntrs++;
575 break;
576 }
577
31eba5bc
FF		 578 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
579 res = drv_add_interface(local, sdata);
580 if (res)
581 goto err_stop;
582 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 583 res = ieee80211_add_virtual_monitor(local);
584 if (res)
585 goto err_stop;
586 }
587
0d143fe1
JB		 588 /* must be before the call to ieee80211_configure_filter */
589 local->monitors++;
e8975581 590 if (local->monitors == 1) {
0869aea0
JB		 591 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
592 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 593 }
0d143fe1 594
85416a4f 595 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 596 ieee80211_configure_filter(local);
801d929c
FF		 597 mutex_lock(&local->mtx);
598 ieee80211_recalc_idle(local);
599 mutex_unlock(&local->mtx);
53e9b1de
DG		 600
601 netif_carrier_on(dev);
0d143fe1 602 break;
0d143fe1 603 default:
34d4bc4d 604 if (coming_up) {
075e0847
JB		 605 ieee80211_del_virtual_monitor(local);
606
7b7eab6f 607 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 608 if (res)
609 goto err_stop;
a9865538
JB		 610 res = ieee80211_check_queues(sdata,
611 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 612 if (res)
613 goto err_del_interface;
34d4bc4d 614 }
0d143fe1 615
29cbe68c 616 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 617 local->fif_pspoll++;
7be5086d 618 local->fif_probe_req++;
e3b90ca2 619
e3b90ca2 620 ieee80211_configure_filter(local);
7be5086d
JB		 621 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
622 local->fif_probe_req++;
a3c9aa51 623 }
e3b90ca2 624
f142c6b9
JB		 625 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
626 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 627 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 628
c405c629
JB		 629 switch (sdata->vif.type) {
630 case NL80211_IFTYPE_STATION:
631 case NL80211_IFTYPE_ADHOC:
632 case NL80211_IFTYPE_AP:
633 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 634 netif_carrier_off(dev);
c405c629 635 break;
1411af15 636 case NL80211_IFTYPE_WDS:
f142c6b9 637 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 638 break;
c405c629 639 default:
a2310824
JB		 640 /* not reached */
641 WARN_ON(1);
c405c629 642 }
59034591
EP		 643
644 /*
645 * set default queue parameters so drivers don't
646 * need to initialise the hardware if the hardware
647 * doesn't start up with sane defaults
648 */
3abead59 649 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 650 }
651
2d2080c3
JB		 652 set_bit(SDATA_STATE_RUNNING, &sdata->state);
653
0d143fe1
JB		 654 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
655 /* Create STA entry for the WDS peer */
656 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
657 GFP_KERNEL);
658 if (!sta) {
659 res = -ENOMEM;
660 goto err_del_interface;
661 }
662
83d5cc01
JB		 663 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
664 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
665 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 666
667 res = sta_info_insert(sta);
668 if (res) {
669 /* STA has been freed */
670 goto err_del_interface;
671 }
1be7fe8d
BJ		 672
673 rate_control_rate_init(sta);
1411af15 674 netif_carrier_on(dev);
f142c6b9
JB		 675 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
676 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 677 }
678
0d143fe1
JB		 679 /*
680 * set_multicast_list will be invoked by the networking core
681 * which will check whether any increments here were done in
682 * error and sync them down to the hardware as filter flags.
683 */
684 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
685 atomic_inc(&local->iff_allmultis);
686
687 if (sdata->flags & IEEE80211_SDATA_PROMISC)
688 atomic_inc(&local->iff_promiscs);
689
34d4bc4d
JB		 690 if (coming_up)
691 local->open_count++;
692
59034591 693 if (hw_reconf_flags)
e8975581 694 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 695
10f644a4 696 ieee80211_recalc_ps(local, -1);
965bedad 697
2b436312
JB		 698 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
699 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
700 /* XXX: for AP_VLAN, actually track AP queues */
701 netif_tx_start_all_queues(dev);
702 } else if (dev) {
2b730daa
JB		 703 unsigned long flags;
704 int n_acs = IEEE80211_NUM_ACS;
705 int ac;
706
707 if (local->hw.queues < IEEE80211_NUM_ACS)
708 n_acs = 1;
709
710 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
711 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
712 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
713 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
714 for (ac = 0; ac < n_acs; ac++) {
715 int ac_queue = sdata->vif.hw_queue[ac];
716
717 if (local->queue_stop_reasons[ac_queue] == 0 &&
718 skb_queue_empty(&local->pending[ac_queue]))
719 netif_start_subqueue(dev, ac);
720 }
721 }
722 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
723 }
0d143fe1
JB		 724
725 return 0;
726 err_del_interface:
7b7eab6f 727 drv_remove_interface(local, sdata);
0d143fe1 728 err_stop:
24487981
JB		 729 if (!local->open_count)
730 drv_stop(local);
0d143fe1
JB		 731 err_del_bss:
732 sdata->bss = NULL;
4e141dad
MK		 733 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
734 mutex_lock(&local->mtx);
0d143fe1 735 list_del(&sdata->u.vlan.list);
4e141dad
MK		 736 mutex_unlock(&local->mtx);
737 }
4d6c36fa 738 /* might already be clear but that doesn't matter */
2d2080c3 739 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 740 return res;
741}
742
34d4bc4d 743static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 744{
745 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 746 int err;
747
748 /* fail early if user set an invalid address */
2fcf2824 749 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 750 return -EADDRNOTAVAIL;
751
752 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
753 if (err)
754 return err;
755
f142c6b9 756 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 757}
758
759static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
760 bool going_down)
761{
0d143fe1 762 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 763 unsigned long flags;
764 struct sk_buff *skb, *tmp;
e8975581 765 u32 hw_reconf_flags = 0;
09f4114e 766 int i, flushed;
397a7a24 767 struct ps_data *ps;
d2859df5 768 struct cfg80211_chan_def chandef;
46238845 769 bool cancel_scan;
0d143fe1 770
c29acf20
RM		 771 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
772
46238845
JB		 773 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
774 if (cancel_scan)
352ffad6
BC		 775 ieee80211_scan_cancel(local);
776
0d143fe1
JB		 777 /*
778 * Stop TX on this interface first.
779 */
f142c6b9
JB		 780 if (sdata->dev)
781 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 782
c8f994ee 783 ieee80211_roc_purge(local, sdata);
af6b6374 784
8ffcc704
EG		 785 switch (sdata->vif.type) {
786 case NL80211_IFTYPE_STATION:
572078be 787 ieee80211_mgd_stop(sdata);
8ffcc704
EG		 788 break;
789 case NL80211_IFTYPE_ADHOC:
cd7760e6 790 ieee80211_ibss_stop(sdata);
8ffcc704
EG		 791 break;
792 case NL80211_IFTYPE_AP:
793 cancel_work_sync(&sdata->u.ap.request_smps_work);
794 break;
795 default:
796 break;
797 }
cd7760e6 798
0d143fe1
JB		 799 /*
800 * Remove all stations associated with this interface.
801 *
802 * This must be done before calling ops->remove_interface()
803 * because otherwise we can later invoke ops->sta_notify()
804 * whenever the STAs are removed, and that invalidates driver
805 * assumptions about always getting a vif pointer that is valid
806 * (because if we remove a STA after ops->remove_interface()
807 * the driver will have removed the vif info already!)
808 *
09f4114e
JB		 809 * This is relevant only in WDS mode, in all other modes we've
810 * already removed all stations when disconnecting or similar,
811 * so warn otherwise.
0d143fe1 812 */
d34ba216 813 flushed = sta_info_flush(sdata);
09f4114e
JB		 814 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
815 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 816
afdc7c18 817 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 818 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
819 atomic_dec(&local->iff_allmultis);
820
821 if (sdata->flags & IEEE80211_SDATA_PROMISC)
822 atomic_dec(&local->iff_promiscs);
823
7be5086d 824 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 825 local->fif_pspoll--;
7be5086d
JB		 826 local->fif_probe_req--;
827 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
828 local->fif_probe_req--;
829 }
e3b90ca2 830
f142c6b9
JB		 831 if (sdata->dev) {
832 netif_addr_lock_bh(sdata->dev);
833 spin_lock_bh(&local->filter_lock);
834 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
835 sdata->dev->addr_len);
836 spin_unlock_bh(&local->filter_lock);
837 netif_addr_unlock_bh(sdata->dev);
f142c6b9 838 }
3ac64bee 839
7cbf0ba5
VN		 840 del_timer_sync(&local->dynamic_ps_timer);
841 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 842
04ecd257 843 cancel_work_sync(&sdata->recalc_smps);
dbd72850 844 sdata_lock(sdata);
59af6928 845 mutex_lock(&local->mtx);
73da7d5b 846 sdata->vif.csa_active = false;
a46992b4
LC		 847 if (sdata->csa_block_tx) {
848 ieee80211_wake_vif_queues(local, sdata,
849 IEEE80211_QUEUE_STOP_REASON_CSA);
850 sdata->csa_block_tx = false;
851 }
59af6928 852 mutex_unlock(&local->mtx);
dbd72850 853 sdata_unlock(sdata);
59af6928 854
73da7d5b 855 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 856
164eb02d
SW		 857 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
858
859 if (sdata->wdev.cac_started) {
d2859df5 860 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 861 WARN_ON(local->suspended);
34a3740d 862 mutex_lock(&local->mtx);
164eb02d 863 ieee80211_vif_release_channel(sdata);
34a3740d 864 mutex_unlock(&local->mtx);
d2859df5
JD		 865 cfg80211_cac_event(sdata->dev, &chandef,
866 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 867 GFP_KERNEL);
868 }
869
0d143fe1
JB		 870 /* APs need special treatment */
871 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 872 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 873
874 /* down all dependent devices, that is VLANs */
57c9fff3 875 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 876 u.vlan.list)
877 dev_close(vlan->dev);
878 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 879 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
880 /* remove all packets in parent bc_buf pointing to this dev */
881 ps = &sdata->bss->ps;
882
883 spin_lock_irqsave(&ps->bc_buf.lock, flags);
884 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
885 if (skb->dev == sdata->dev) {
886 __skb_unlink(skb, &ps->bc_buf);
887 local->total_ps_buffered--;
888 ieee80211_free_txskb(&local->hw, skb);
889 }
890 }
891 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 892 }
893
34d4bc4d
JB		 894 if (going_down)
895 local->open_count--;
0d143fe1
JB		 896
897 switch (sdata->vif.type) {
898 case NL80211_IFTYPE_AP_VLAN:
4e141dad 899 mutex_lock(&local->mtx);
0d143fe1 900 list_del(&sdata->u.vlan.list);
4e141dad 901 mutex_unlock(&local->mtx);
0c2bef46 902 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
10b68487
FF		 903 /* see comment in the default case below */
904 ieee80211_free_keys(sdata, true);
0d143fe1
JB		 905 /* no need to tell driver */
906 break;
907 case NL80211_IFTYPE_MONITOR:
908 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
909 local->cooked_mntrs--;
910 break;
911 }
912
913 local->monitors--;
e8975581 914 if (local->monitors == 0) {
0869aea0
JB		 915 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
916 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 917 }
0d143fe1 918
85416a4f 919 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 920 break;
f142c6b9
JB		 921 case NL80211_IFTYPE_P2P_DEVICE:
922 /* relies on synchronize_rcu() below */
0c2bef46 923 RCU_INIT_POINTER(local->p2p_sdata, NULL);
f142c6b9 924 /* fall through */
0d143fe1 925 default:
0b7dff4f 926 cancel_work_sync(&sdata->work);
35f20c14
JB		 927 /*
928 * When we get here, the interface is marked down.
7907c7d3 929 * Free the remaining keys, if there are any
10b68487
FF		 930 * (which can happen in AP mode if userspace sets
931 * keys before the interface is operating, and maybe
932 * also in WDS mode)
75de9113 933 *
7907c7d3
JB		 934 * Force the key freeing to always synchronize_net()
935 * to wait for the RX path in case it is using this
10b68487 936 * interface enqueuing frames at this very time on
75de9113 937 * another CPU.
35f20c14 938 */
7907c7d3 939 ieee80211_free_keys(sdata, true);
1861b845 940 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 941 }
942
943 sdata->bss = NULL;
944
5061b0c2
JB		 945 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
946 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
947 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
948 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
949 if (info->control.vif == &sdata->vif) {
950 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 951 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 952 }
953 }
954 }
955 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 956
b2c0958b
JB		 957 if (local->open_count == 0)
958 ieee80211_clear_tx_pending(local);
959
960 /*
961 * If the interface goes down while suspended, presumably because
962 * the device was unplugged and that happens before our resume,
963 * then the driver is already unconfigured and the remainder of
964 * this function isn't needed.
965 * XXX: what about WoWLAN? If the device has software state, e.g.
966 * memory allocated, it might expect teardown commands from
967 * mac80211 here?
968 */
969 if (local->suspended) {
970 WARN_ON(local->wowlan);
971 WARN_ON(rtnl_dereference(local->monitor_sdata));
972 return;
973 }
974
975 switch (sdata->vif.type) {
976 case NL80211_IFTYPE_AP_VLAN:
977 break;
978 case NL80211_IFTYPE_MONITOR:
979 if (local->monitors == 0)
980 ieee80211_del_virtual_monitor(local);
981
982 mutex_lock(&local->mtx);
983 ieee80211_recalc_idle(local);
984 mutex_unlock(&local->mtx);
31eba5bc
FF		 985
986 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
987 break;
988
989 /* fall through */
b2c0958b
JB		 990 default:
991 if (going_down)
992 drv_remove_interface(local, sdata);
993 }
994
995 ieee80211_recalc_ps(local, -1);
996
46238845
JB		 997 if (cancel_scan)
998 flush_delayed_work(&local->scan_work);
999
b2c0958b
JB		 1000 if (local->open_count == 0) {
1001 ieee80211_stop_device(local);
1002
1003 /* no reconfiguring after stop! */
1004 return;
1005 }
1006
1007 /* do after stop to avoid reconfiguring when we stop anyway */
1008 ieee80211_configure_filter(local);
1009 ieee80211_hw_config(local, hw_reconf_flags);
1010
1011 if (local->monitors == local->open_count)
075e0847 1012 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 1013}
1014
1015static int ieee80211_stop(struct net_device *dev)
1016{
1017 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1018
1019 ieee80211_do_stop(sdata, true);
5061b0c2 1020
0d143fe1
JB		 1021 return 0;
1022}
1023
1024static void ieee80211_set_multicast_list(struct net_device *dev)
1025{
0d143fe1 1026 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 1027 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 1028 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1029
1030 allmulti = !!(dev->flags & IFF_ALLMULTI);
1031 promisc = !!(dev->flags & IFF_PROMISC);
1032 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1033 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1034
1035 if (allmulti != sdata_allmulti) {
1036 if (dev->flags & IFF_ALLMULTI)
1037 atomic_inc(&local->iff_allmultis);
1038 else
1039 atomic_dec(&local->iff_allmultis);
1040 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1041 }
1042
1043 if (promisc != sdata_promisc) {
1044 if (dev->flags & IFF_PROMISC)
1045 atomic_inc(&local->iff_promiscs);
1046 else
1047 atomic_dec(&local->iff_promiscs);
1048 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1049 }
3b8d81e0 1050 spin_lock_bh(&local->filter_lock);
22bedad3 1051 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1052 spin_unlock_bh(&local->filter_lock);
3ac64bee 1053 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1054}
1055
75636525
JB		 1056/*
1057 * Called when the netdev is removed or, by the code below, before
1058 * the interface type changes.
1059 */
f142c6b9 1060static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1061{
1062 int i;
1063
75636525 1064 /* free extra data */
7907c7d3 1065 ieee80211_free_keys(sdata, false);
75636525 1066
aee14ceb
JM		 1067 ieee80211_debugfs_remove_netdev(sdata);
1068
f0706e82 1069 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1070 __skb_queue_purge(&sdata->fragments[i].skb_list);
1071 sdata->fragment_next = 0;
11a843b7 1072
b9dcf712
JB		 1073 if (ieee80211_vif_is_mesh(&sdata->vif))
1074 mesh_rmc_free(sdata);
f0706e82
JB		 1075}
1076
f142c6b9
JB		 1077static void ieee80211_uninit(struct net_device *dev)
1078{
1079 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1080}
1081
cf0277e7 1082static u16 ieee80211_netdev_select_queue(struct net_device *dev,
f663dd9a 1083 struct sk_buff *skb,
99932d4f
DB		 1084 void *accel_priv,
1085 select_queue_fallback_t fallback)
cf0277e7
JB		 1086{
1087 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1088}
1089
587e729e
JB		 1090static const struct net_device_ops ieee80211_dataif_ops = {
1091 .ndo_open = ieee80211_open,
1092 .ndo_stop = ieee80211_stop,
f142c6b9 1093 .ndo_uninit = ieee80211_uninit,
587e729e 1094 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1095 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1096 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1097 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1098 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1099};
1100
cf0277e7 1101static u16 ieee80211_monitor_select_queue(struct net_device *dev,
f663dd9a 1102 struct sk_buff *skb,
99932d4f
DB		 1103 void *accel_priv,
1104 select_queue_fallback_t fallback)
cf0277e7
JB		 1105{
1106 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1107 struct ieee80211_local *local = sdata->local;
1108 struct ieee80211_hdr *hdr;
1109 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1110
32c5057b 1111 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1112 return 0;
1113
1114 if (skb->len < 4 ||
b49bb574 1115 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1116 return 0; /* doesn't matter, frame will be dropped */
1117
b49bb574 1118 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1119
00e96dec 1120 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1121}
1122
587e729e
JB		 1123static const struct net_device_ops ieee80211_monitorif_ops = {
1124 .ndo_open = ieee80211_open,
1125 .ndo_stop = ieee80211_stop,
f142c6b9 1126 .ndo_uninit = ieee80211_uninit,
587e729e 1127 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1128 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1129 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1130 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1131 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1132};
1133
1134static void ieee80211_if_setup(struct net_device *dev)
1135{
1136 ether_setup(dev);
550fd08c 1137 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1138 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1139 dev->destructor = free_netdev;
1140}
1141
1fa57d01
JB		 1142static void ieee80211_iface_work(struct work_struct *work)
1143{
1144 struct ieee80211_sub_if_data *sdata =
1145 container_of(work, struct ieee80211_sub_if_data, work);
1146 struct ieee80211_local *local = sdata->local;
1147 struct sk_buff *skb;
344eec67 1148 struct sta_info *sta;
c1475ca9 1149 struct ieee80211_ra_tid *ra_tid;
08cf42e8 1150 struct ieee80211_rx_agg *rx_agg;
1fa57d01
JB		 1151
1152 if (!ieee80211_sdata_running(sdata))
1153 return;
1154
1155 if (local->scanning)
1156 return;
1157
1158 /*
1159 * ieee80211_queue_work() should have picked up most cases,
1160 * here we'll pick the rest.
1161 */
1162 if (WARN(local->suspended,
1163 "interface work scheduled while going to suspend\n"))
1164 return;
1165
1166 /* first process frames */
1167 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1168 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1169
c1475ca9
JB		 1170 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1171 ra_tid = (void *)&skb->cb;
1172 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1173 ra_tid->tid);
1174 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1175 ra_tid = (void *)&skb->cb;
1176 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1177 ra_tid->tid);
08cf42e8
MK		 1178 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1179 rx_agg = (void *)&skb->cb;
1180 mutex_lock(&local->sta_mtx);
1181 sta = sta_info_get_bss(sdata, rx_agg->addr);
4549cf2b 1182 if (sta)
08cf42e8 1183 __ieee80211_start_rx_ba_session(sta,
4549cf2b 1184 0, 0, 0, 1, rx_agg->tid,
08cf42e8 1185 IEEE80211_MAX_AMPDU_BUF,
4549cf2b 1186 false, true);
08cf42e8
MK		 1187 mutex_unlock(&local->sta_mtx);
1188 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1189 rx_agg = (void *)&skb->cb;
1190 mutex_lock(&local->sta_mtx);
1191 sta = sta_info_get_bss(sdata, rx_agg->addr);
1192 if (sta)
1193 __ieee80211_stop_rx_ba_session(sta,
1194 rx_agg->tid,
1195 WLAN_BACK_RECIPIENT, 0,
1196 false);
1197 mutex_unlock(&local->sta_mtx);
c1475ca9
JB		 1198 } else if (ieee80211_is_action(mgmt->frame_control) &&
1199 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1200 int len = skb->len;
bed7ee6e 1201
a93e3644 1202 mutex_lock(&local->sta_mtx);
875ae5f6 1203 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1204 if (sta) {
1205 switch (mgmt->u.action.u.addba_req.action_code) {
1206 case WLAN_ACTION_ADDBA_REQ:
1207 ieee80211_process_addba_request(
1208 local, sta, mgmt, len);
1209 break;
1210 case WLAN_ACTION_ADDBA_RESP:
1211 ieee80211_process_addba_resp(local, sta,
1212 mgmt, len);
1213 break;
1214 case WLAN_ACTION_DELBA:
1215 ieee80211_process_delba(sdata, sta,
1216 mgmt, len);
1217 break;
1218 default:
1219 WARN_ON(1);
1220 break;
1221 }
1222 }
a93e3644 1223 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1224 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1225 struct ieee80211_hdr *hdr = (void *)mgmt;
1226 /*
1227 * So the frame isn't mgmt, but frame_control
1228 * is at the right place anyway, of course, so
1229 * the if statement is correct.
1230 *
1231 * Warn if we have other data frame types here,
1232 * they must not get here.
1233 */
1234 WARN_ON(hdr->frame_control &
1235 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1236 WARN_ON(!(hdr->seq_ctrl &
1237 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1238 /*
1239 * This was a fragment of a frame, received while
1240 * a block-ack session was active. That cannot be
1241 * right, so terminate the session.
1242 */
a93e3644 1243 mutex_lock(&local->sta_mtx);
875ae5f6 1244 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1245 if (sta) {
1246 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1247 IEEE80211_QOS_CTL_TID_MASK;
1248
1249 __ieee80211_stop_rx_ba_session(
1250 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1251 WLAN_REASON_QSTA_REQUIRE_SETUP,
1252 true);
344eec67 1253 }
a93e3644 1254 mutex_unlock(&local->sta_mtx);
bed7ee6e 1255 } else switch (sdata->vif.type) {
1fa57d01
JB		 1256 case NL80211_IFTYPE_STATION:
1257 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1258 break;
1259 case NL80211_IFTYPE_ADHOC:
1260 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1261 break;
1262 case NL80211_IFTYPE_MESH_POINT:
1263 if (!ieee80211_vif_is_mesh(&sdata->vif))
1264 break;
1265 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1266 break;
1267 default:
1268 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1269 break;
1270 }
36b3a628
JB		 1271
1272 kfree_skb(skb);
1fa57d01
JB		 1273 }
1274
1275 /* then other type-dependent work */
1276 switch (sdata->vif.type) {
1277 case NL80211_IFTYPE_STATION:
1278 ieee80211_sta_work(sdata);
1279 break;
1280 case NL80211_IFTYPE_ADHOC:
1281 ieee80211_ibss_work(sdata);
1282 break;
1283 case NL80211_IFTYPE_MESH_POINT:
1284 if (!ieee80211_vif_is_mesh(&sdata->vif))
1285 break;
1286 ieee80211_mesh_work(sdata);
1287 break;
1288 default:
1289 break;
1290 }
1291}
1292
04ecd257
JB		 1293static void ieee80211_recalc_smps_work(struct work_struct *work)
1294{
1295 struct ieee80211_sub_if_data *sdata =
1296 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1297
1298 ieee80211_recalc_smps(sdata);
1299}
1fa57d01 1300
75636525
JB		 1301/*
1302 * Helper function to initialise an interface to a specific type.
1303 */
1304static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1305 enum nl80211_iftype type)
f0706e82 1306{
75636525
JB		 1307 /* clear type-dependent union */
1308 memset(&sdata->u, 0, sizeof(sdata->u));
1309
1310 /* and set some type-dependent values */
1311 sdata->vif.type = type;
2ca27bcf 1312 sdata->vif.p2p = false;
60719ffd 1313 sdata->wdev.iftype = type;
75636525 1314
a621fa4d
JB		 1315 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1316 sdata->control_port_no_encrypt = false;
2475b1cc 1317 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
d3a58df8 1318 sdata->vif.bss_conf.idle = true;
a621fa4d 1319
b53be792
SW		 1320 sdata->noack_map = 0;
1321
f142c6b9
JB		 1322 /* only monitor/p2p-device differ */
1323 if (sdata->dev) {
1324 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1325 sdata->dev->type = ARPHRD_ETHER;
1326 }
75636525 1327
35f20c14 1328 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1329 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1330 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1331 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
484298ad 1332 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
e3afb920 1333 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
35f20c14 1334
75636525 1335 switch (type) {
2ca27bcf
JB		 1336 case NL80211_IFTYPE_P2P_GO:
1337 type = NL80211_IFTYPE_AP;
1338 sdata->vif.type = type;
1339 sdata->vif.p2p = true;
1340 /* fall through */
05c914fe 1341 case NL80211_IFTYPE_AP:
d012a605 1342 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1343 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1344 INIT_WORK(&sdata->u.ap.request_smps_work,
1345 ieee80211_request_smps_ap_work);
ad2d223a 1346 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1347 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1348 break;
2ca27bcf
JB		 1349 case NL80211_IFTYPE_P2P_CLIENT:
1350 type = NL80211_IFTYPE_STATION;
1351 sdata->vif.type = type;
1352 sdata->vif.p2p = true;
1353 /* fall through */
05c914fe 1354 case NL80211_IFTYPE_STATION:
ad2d223a 1355 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1356 ieee80211_sta_setup_sdata(sdata);
472dbc45 1357 break;
46900298 1358 case NL80211_IFTYPE_ADHOC:
ad2d223a 1359 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1360 ieee80211_ibss_setup_sdata(sdata);
1361 break;
05c914fe 1362 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1363 if (ieee80211_vif_is_mesh(&sdata->vif))
1364 ieee80211_mesh_init_sdata(sdata);
1365 break;
05c914fe 1366 case NL80211_IFTYPE_MONITOR:
75636525 1367 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1368 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1369 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1370 MONITOR_FLAG_OTHER_BSS;
1371 break;
05c914fe 1372 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1373 sdata->vif.bss_conf.bssid = NULL;
1374 break;
05c914fe 1375 case NL80211_IFTYPE_AP_VLAN:
98104fde 1376 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1377 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1378 break;
05c914fe 1379 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1380 case NUM_NL80211_IFTYPES:
75636525
JB		 1381 BUG();
1382 break;
1383 }
1384
1385 ieee80211_debugfs_add_netdev(sdata);
1386}
1387
34d4bc4d
JB		 1388static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1389 enum nl80211_iftype type)
1390{
1391 struct ieee80211_local *local = sdata->local;
1392 int ret, err;
2ca27bcf
JB		 1393 enum nl80211_iftype internal_type = type;
1394 bool p2p = false;
34d4bc4d
JB		 1395
1396 ASSERT_RTNL();
1397
1398 if (!local->ops->change_interface)
1399 return -EBUSY;
1400
1401 switch (sdata->vif.type) {
1402 case NL80211_IFTYPE_AP:
1403 case NL80211_IFTYPE_STATION:
1404 case NL80211_IFTYPE_ADHOC:
1405 /*
1406 * Could maybe also all others here?
1407 * Just not sure how that interacts
1408 * with the RX/config path e.g. for
1409 * mesh.
1410 */
1411 break;
1412 default:
1413 return -EBUSY;
1414 }
1415
1416 switch (type) {
1417 case NL80211_IFTYPE_AP:
1418 case NL80211_IFTYPE_STATION:
1419 case NL80211_IFTYPE_ADHOC:
1420 /*
1421 * Could probably support everything
1422 * but WDS here (WDS do_open can fail
1423 * under memory pressure, which this
1424 * code isn't prepared to handle).
1425 */
1426 break;
2ca27bcf
JB		 1427 case NL80211_IFTYPE_P2P_CLIENT:
1428 p2p = true;
1429 internal_type = NL80211_IFTYPE_STATION;
1430 break;
1431 case NL80211_IFTYPE_P2P_GO:
1432 p2p = true;
1433 internal_type = NL80211_IFTYPE_AP;
1434 break;
34d4bc4d
JB		 1435 default:
1436 return -EBUSY;
1437 }
1438
2ca27bcf 1439 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1440 if (ret)
1441 return ret;
1442
1443 ieee80211_do_stop(sdata, false);
1444
f142c6b9 1445 ieee80211_teardown_sdata(sdata);
34d4bc4d 1446
2ca27bcf 1447 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1448 if (ret)
a9865538 1449 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1450
3a25a8c8
JB		 1451 /*
1452 * Ignore return value here, there's not much we can do since
1453 * the driver changed the interface type internally already.
1454 * The warnings will hopefully make driver authors fix it :-)
1455 */
a9865538 1456 ieee80211_check_queues(sdata, type);
3a25a8c8 1457
34d4bc4d
JB		 1458 ieee80211_setup_sdata(sdata, type);
1459
f142c6b9 1460 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1461 WARN(err, "type change: do_open returned %d", err);
1462
1463 return ret;
1464}
1465
f3947e2d 1466int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1467 enum nl80211_iftype type)
75636525 1468{
34d4bc4d
JB		 1469 int ret;
1470
f3947e2d
JB		 1471 ASSERT_RTNL();
1472
2ca27bcf 1473 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1474 return 0;
1475
34d4bc4d
JB		 1476 if (ieee80211_sdata_running(sdata)) {
1477 ret = ieee80211_runtime_change_iftype(sdata, type);
1478 if (ret)
1479 return ret;
1480 } else {
1481 /* Purge and reset type-dependent state. */
f142c6b9 1482 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1483 ieee80211_setup_sdata(sdata, type);
1484 }
75636525
JB		 1485
1486 /* reset some values that shouldn't be kept across type changes */
75636525 1487 sdata->drop_unencrypted = 0;
9bc383de
JB		 1488 if (type == NL80211_IFTYPE_STATION)
1489 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1490
1491 return 0;
f0706e82
JB		 1492}
1493
fa9029f8 1494static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1495 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1496{
1497 struct ieee80211_sub_if_data *sdata;
1498 u64 mask, start, addr, val, inc;
1499 u8 *m;
1500 u8 tmp_addr[ETH_ALEN];
1501 int i;
1502
1503 /* default ... something at least */
f142c6b9 1504 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1505
1506 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1507 local->hw.wiphy->n_addresses <= 1)
1508 return;
1509
fa9029f8
JB		 1510 mutex_lock(&local->iflist_mtx);
1511
1512 switch (type) {
1513 case NL80211_IFTYPE_MONITOR:
1514 /* doesn't matter */
1515 break;
1516 case NL80211_IFTYPE_WDS:
1517 case NL80211_IFTYPE_AP_VLAN:
1518 /* match up with an AP interface */
1519 list_for_each_entry(sdata, &local->interfaces, list) {
1520 if (sdata->vif.type != NL80211_IFTYPE_AP)
1521 continue;
f142c6b9 1522 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1523 break;
1524 }
1525 /* keep default if no AP interface present */
1526 break;
6d71117a
JB		 1527 case NL80211_IFTYPE_P2P_CLIENT:
1528 case NL80211_IFTYPE_P2P_GO:
1529 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1530 list_for_each_entry(sdata, &local->interfaces, list) {
1531 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1532 continue;
1533 if (!ieee80211_sdata_running(sdata))
1534 continue;
1535 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1536 goto out_unlock;
1537 }
1538 }
1539 /* otherwise fall through */
fa9029f8
JB		 1540 default:
1541 /* assign a new address if possible -- try n_addresses first */
1542 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1543 bool used = false;
1544
1545 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1546 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1547 sdata->vif.addr)) {
fa9029f8
JB		 1548 used = true;
1549 break;
1550 }
1551 }
1552
1553 if (!used) {
f142c6b9 1554 memcpy(perm_addr,
fa9029f8
JB		 1555 local->hw.wiphy->addresses[i].addr,
1556 ETH_ALEN);
1557 break;
1558 }
1559 }
1560
1561 /* try mask if available */
1562 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1563 break;
1564
1565 m = local->hw.wiphy->addr_mask;
1566 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1567 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1568 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1569
1570 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1571 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1572 pr_info("not contiguous\n");
fa9029f8
JB		 1573 break;
1574 }
1575
ac20976d
HS		 1576 /*
1577 * Pick address of existing interface in case user changed
1578 * MAC address manually, default to perm_addr.
1579 */
fa9029f8 1580 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1581 list_for_each_entry(sdata, &local->interfaces, list) {
1582 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1583 continue;
1584 m = sdata->vif.addr;
1585 break;
1586 }
fa9029f8
JB		 1587 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1588 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1589 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1590
1591 inc = 1ULL<<__ffs64(mask);
1592 val = (start & mask);
1593 addr = (start & ~mask) | (val & mask);
1594 do {
1595 bool used = false;
1596
1597 tmp_addr[5] = addr >> 0*8;
1598 tmp_addr[4] = addr >> 1*8;
1599 tmp_addr[3] = addr >> 2*8;
1600 tmp_addr[2] = addr >> 3*8;
1601 tmp_addr[1] = addr >> 4*8;
1602 tmp_addr[0] = addr >> 5*8;
1603
1604 val += inc;
1605
1606 list_for_each_entry(sdata, &local->interfaces, list) {
496d7e8e 1607 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
fa9029f8
JB		 1608 used = true;
1609 break;
1610 }
1611 }
1612
1613 if (!used) {
f142c6b9 1614 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1615 break;
1616 }
1617 addr = (start & ~mask) | (val & mask);
1618 } while (addr != start);
1619
1620 break;
1621 }
1622
6d71117a 1623 out_unlock:
fa9029f8
JB		 1624 mutex_unlock(&local->iflist_mtx);
1625}
1626
3e122be0 1627int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1628 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1629 struct vif_params *params)
f0706e82 1630{
f142c6b9 1631 struct net_device *ndev = NULL;
f0706e82 1632 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1633 int ret, i;
ded81f6b 1634 int txqs = 1;
f0706e82
JB		 1635
1636 ASSERT_RTNL();
75636525 1637
f142c6b9
JB		 1638 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1639 struct wireless_dev *wdev;
1640
1641 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1642 GFP_KERNEL);
1643 if (!sdata)
1644 return -ENOMEM;
1645 wdev = &sdata->wdev;
1646
1647 sdata->dev = NULL;
1648 strlcpy(sdata->name, name, IFNAMSIZ);
1649 ieee80211_assign_perm_addr(local, wdev->address, type);
1650 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1651 } else {
1652 if (local->hw.queues >= IEEE80211_NUM_ACS)
1653 txqs = IEEE80211_NUM_ACS;
1654
c835a677
TG		 1655 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1656 name, NET_NAME_UNKNOWN,
1657 ieee80211_if_setup, txqs, 1);
f142c6b9
JB		 1658 if (!ndev)
1659 return -ENOMEM;
1660 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1661
1662 ndev->needed_headroom = local->tx_headroom +
1663 4*6 /* four MAC addresses */
1664 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1665 + 6 /* mesh */
1666 + 8 /* rfc1042/bridge tunnel */
1667 - ETH_HLEN /* ethernet hard_header_len */
1668 + IEEE80211_ENCRYPT_HEADROOM;
1669 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1670
1671 ret = dev_alloc_name(ndev, ndev->name);
1672 if (ret < 0) {
1673 free_netdev(ndev);
1674 return ret;
1675 }
1676
1677 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1678 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1679 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1680
1681 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1682 sdata = netdev_priv(ndev);
1683 ndev->ieee80211_ptr = &sdata->wdev;
1684 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1685 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1686
1687 sdata->dev = ndev;
1688 }
75636525
JB		 1689
1690 /* initialise type-independent data */
f0706e82 1691 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1692 sdata->local = local;
75636525
JB		 1693
1694 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1695 skb_queue_head_init(&sdata->fragments[i].skb_list);
1696
1697 INIT_LIST_HEAD(&sdata->key_list);
1698
164eb02d
SW		 1699 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1700 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1701 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1702 ieee80211_delayed_tailroom_dec);
97f97b1f 1703
37eb0b16
JM		 1704 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1705 struct ieee80211_supported_band *sband;
1706 sband = local->hw.wiphy->bands[i];
1707 sdata->rc_rateidx_mask[i] =
1708 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1709 if (sband)
1710 memcpy(sdata->rc_rateidx_mcs_mask[i],
1711 sband->ht_cap.mcs.rx_mask,
1712 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1713 else
1714 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1715 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1716 }
75636525 1717
3a25a8c8
JB		 1718 ieee80211_set_default_queues(sdata);
1719
1ea6f9c0
JB		 1720 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1721 sdata->user_power_level = local->user_power_level;
1722
2475b1cc
MS		 1723 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1724
75636525
JB		 1725 /* setup type-dependent data */
1726 ieee80211_setup_sdata(sdata, type);
f0706e82 1727
f142c6b9
JB		 1728 if (ndev) {
1729 if (params) {
1730 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1731 if (type == NL80211_IFTYPE_STATION)
1732 sdata->u.mgd.use_4addr = params->use_4addr;
1733 }
9bc383de 1734
f142c6b9 1735 ndev->features |= local->hw.netdev_features;
72d78728 1736
b7ffbd7e
JB		 1737 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1738
f142c6b9
JB		 1739 ret = register_netdevice(ndev);
1740 if (ret) {
1741 free_netdev(ndev);
1742 return ret;
1743 }
1744 }
f0706e82 1745
c771c9d8 1746 mutex_lock(&local->iflist_mtx);
79010420 1747 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1748 mutex_unlock(&local->iflist_mtx);
79010420 1749
84efbb84
JB		 1750 if (new_wdev)
1751 *new_wdev = &sdata->wdev;
f0706e82 1752
f0706e82 1753 return 0;
f0706e82
JB		 1754}
1755
f698d856 1756void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1757{
f0706e82 1758 ASSERT_RTNL();
11a843b7 1759
c771c9d8 1760 mutex_lock(&sdata->local->iflist_mtx);
75636525 1761 list_del_rcu(&sdata->list);
c771c9d8
JB		 1762 mutex_unlock(&sdata->local->iflist_mtx);
1763
75636525 1764 synchronize_rcu();
f142c6b9
JB		 1765
1766 if (sdata->dev) {
1767 unregister_netdevice(sdata->dev);
1768 } else {
1769 cfg80211_unregister_wdev(&sdata->wdev);
1770 kfree(sdata);
1771 }
1772}
1773
1774void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1775{
1776 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1777 return;
1778 ieee80211_do_stop(sdata, true);
1779 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1780}
1781
75636525
JB		 1782/*
1783 * Remove all interfaces, may only be called at hardware unregistration
1784 * time because it doesn't do RCU-safe list removals.
1785 */
1786void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1787{
75636525 1788 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1789 LIST_HEAD(unreg_list);
f142c6b9 1790 LIST_HEAD(wdev_list);
f0706e82
JB		 1791
1792 ASSERT_RTNL();
1793
c8aa22db
JB		 1794 /*
1795 * Close all AP_VLAN interfaces first, as otherwise they
1796 * might be closed while the AP interface they belong to
1797 * is closed, causing unregister_netdevice_many() to crash.
1798 */
1799 list_for_each_entry(sdata, &local->interfaces, list)
1800 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1801 dev_close(sdata->dev);
1802
efe117ab 1803 mutex_lock(&local->iflist_mtx);
75636525
JB		 1804 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1805 list_del(&sdata->list);
c771c9d8 1806
f142c6b9
JB		 1807 if (sdata->dev)
1808 unregister_netdevice_queue(sdata->dev, &unreg_list);
1809 else
1810 list_add(&sdata->list, &wdev_list);
f0706e82 1811 }
efe117ab
ED		 1812 mutex_unlock(&local->iflist_mtx);
1813 unregister_netdevice_many(&unreg_list);
f142c6b9
JB		 1814
1815 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1816 list_del(&sdata->list);
1817 cfg80211_unregister_wdev(&sdata->wdev);
1818 kfree(sdata);
1819 }
f0706e82 1820}
5cff20e6 1821
47846c9b 1822static int netdev_notify(struct notifier_block *nb,
351638e7 1823 unsigned long state, void *ptr)
47846c9b 1824{
351638e7 1825 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1826 struct ieee80211_sub_if_data *sdata;
1827
1828 if (state != NETDEV_CHANGENAME)
8bd811aa 1829 return NOTIFY_DONE;
47846c9b
JB		 1830
1831 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
8bd811aa 1832 return NOTIFY_DONE;
47846c9b
JB		 1833
1834 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
8bd811aa 1835 return NOTIFY_DONE;
47846c9b
JB		 1836
1837 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2f5265e6 1838 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b 1839 ieee80211_debugfs_rename_netdev(sdata);
8bd811aa
ZG		 1840
1841 return NOTIFY_OK;
47846c9b
JB		 1842}
1843
1844static struct notifier_block mac80211_netdev_notifier = {
1845 .notifier_call = netdev_notify,
1846};
1847
1848int ieee80211_iface_init(void)
1849{
1850 return register_netdevice_notifier(&mac80211_netdev_notifier);
1851}
1852
1853void ieee80211_iface_exit(void)
1854{
1855 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1856}
Linux kernel - Deliverables
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