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cfg80211: allow beaconing after DFS CAC
[linux-2.6-block.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
3a25a8c8
JB		 404 ieee80211_set_default_queues(sdata);
405
4b6f1dd6
JB		 406 ret = drv_add_interface(local, sdata);
407 if (WARN_ON(ret)) {
408 /* ok .. stupid driver, it asked for this! */
409 kfree(sdata);
8b305780 410 return ret;
4b6f1dd6
JB		 411 }
412
a9865538 413 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 414 if (ret) {
415 kfree(sdata);
8b305780 416 return ret;
3a25a8c8
JB		 417 }
418
4bf88530 419 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 420 IEEE80211_CHANCTX_EXCLUSIVE);
421 if (ret) {
422 drv_remove_interface(local, sdata);
423 kfree(sdata);
8b305780 424 return ret;
55de908a
JB		 425 }
426
8b305780 427 mutex_lock(&local->iflist_mtx);
4b6f1dd6 428 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 429 mutex_unlock(&local->iflist_mtx);
8b305780
JB		 430
431 return 0;
4b6f1dd6
JB		 432}
433
3c3e21e7 434void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 435{
436 struct ieee80211_sub_if_data *sdata;
437
438 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
439 return;
440
8b305780
JB		 441 ASSERT_RTNL();
442
685fb72b 443 mutex_lock(&local->iflist_mtx);
4b6f1dd6 444
685fb72b
JB		 445 sdata = rcu_dereference_protected(local->monitor_sdata,
446 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 447 if (!sdata) {
448 mutex_unlock(&local->iflist_mtx);
449 return;
450 }
4b6f1dd6
JB		 451
452 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB		 453 mutex_unlock(&local->iflist_mtx);
454
4b6f1dd6
JB		 455 synchronize_net();
456
55de908a
JB		 457 ieee80211_vif_release_channel(sdata);
458
4b6f1dd6
JB		 459 drv_remove_interface(local, sdata);
460
461 kfree(sdata);
462}
463
34d4bc4d
JB		 464/*
465 * NOTE: Be very careful when changing this function, it must NOT return
466 * an error on interface type changes that have been pre-checked, so most
467 * checks should be in ieee80211_check_concurrent_iface.
468 */
f142c6b9 469int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 470{
f142c6b9
JB		 471 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
472 struct net_device *dev = wdev->netdev;
87490f6d
JB		 473 struct ieee80211_local *local = sdata->local;
474 struct sta_info *sta;
475 u32 changed = 0;
476 int res;
477 u32 hw_reconf_flags = 0;
478
0d143fe1
JB		 479 switch (sdata->vif.type) {
480 case NL80211_IFTYPE_WDS:
481 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
482 return -ENOLINK;
483 break;
665c93a9
JB		 484 case NL80211_IFTYPE_AP_VLAN: {
485 struct ieee80211_sub_if_data *master;
486
0d143fe1
JB		 487 if (!sdata->bss)
488 return -ENOLINK;
665c93a9 489
0d143fe1 490 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 491
492 master = container_of(sdata->bss,
493 struct ieee80211_sub_if_data, u.ap);
494 sdata->control_port_protocol =
495 master->control_port_protocol;
496 sdata->control_port_no_encrypt =
497 master->control_port_no_encrypt;
1351c5d3
JB		 498 sdata->vif.cab_queue = master->vif.cab_queue;
499 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
500 sizeof(sdata->vif.hw_queue));
0d143fe1 501 break;
665c93a9 502 }
0d143fe1
JB		 503 case NL80211_IFTYPE_AP:
504 sdata->bss = &sdata->u.ap;
505 break;
506 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 507 case NL80211_IFTYPE_STATION:
508 case NL80211_IFTYPE_MONITOR:
509 case NL80211_IFTYPE_ADHOC:
f142c6b9 510 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 511 /* no special treatment */
512 break;
513 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 514 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 515 case NL80211_IFTYPE_P2P_CLIENT:
516 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 517 /* cannot happen */
518 WARN_ON(1);
519 break;
520 }
521
522 if (local->open_count == 0) {
24487981 523 res = drv_start(local);
0d143fe1
JB		 524 if (res)
525 goto err_del_bss;
e8975581
JB		 526 /* we're brought up, everything changes */
527 hw_reconf_flags = ~0;
1f87f7d3 528 ieee80211_led_radio(local, true);
67408c8c
JB		 529 ieee80211_mod_tpt_led_trig(local,
530 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 531 }
532
533 /*
bf533e0b
JB		 534 * Copy the hopefully now-present MAC address to
535 * this interface, if it has the special null one.
0d143fe1 536 */
f142c6b9 537 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 538 memcpy(dev->dev_addr,
539 local->hw.wiphy->perm_addr,
540 ETH_ALEN);
541 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
542
543 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 544 res = -EADDRNOTAVAIL;
545 goto err_stop;
0adc23f5 546 }
0d143fe1
JB		 547 }
548
0d143fe1
JB		 549 switch (sdata->vif.type) {
550 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 551 /* no need to tell driver, but set carrier and chanctx */
552 if (rtnl_dereference(sdata->bss->beacon)) {
553 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 554 netif_carrier_on(dev);
4d76d21b 555 } else {
3edaf3e6 556 netif_carrier_off(dev);
4d76d21b 557 }
0d143fe1
JB		 558 break;
559 case NL80211_IFTYPE_MONITOR:
560 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
561 local->cooked_mntrs++;
562 break;
563 }
564
31eba5bc
FF		 565 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
566 res = drv_add_interface(local, sdata);
567 if (res)
568 goto err_stop;
569 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 570 res = ieee80211_add_virtual_monitor(local);
571 if (res)
572 goto err_stop;
573 }
574
0d143fe1
JB		 575 /* must be before the call to ieee80211_configure_filter */
576 local->monitors++;
e8975581 577 if (local->monitors == 1) {
0869aea0
JB		 578 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
579 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 580 }
0d143fe1 581
85416a4f 582 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 583 ieee80211_configure_filter(local);
801d929c
FF		 584 mutex_lock(&local->mtx);
585 ieee80211_recalc_idle(local);
586 mutex_unlock(&local->mtx);
53e9b1de
DG		 587
588 netif_carrier_on(dev);
0d143fe1 589 break;
0d143fe1 590 default:
34d4bc4d 591 if (coming_up) {
075e0847
JB		 592 ieee80211_del_virtual_monitor(local);
593
7b7eab6f 594 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 595 if (res)
596 goto err_stop;
a9865538
JB		 597 res = ieee80211_check_queues(sdata,
598 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 599 if (res)
600 goto err_del_interface;
34d4bc4d 601 }
0d143fe1 602
29cbe68c 603 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 604 local->fif_pspoll++;
7be5086d 605 local->fif_probe_req++;
e3b90ca2 606
e3b90ca2 607 ieee80211_configure_filter(local);
7be5086d
JB		 608 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
609 local->fif_probe_req++;
a3c9aa51 610 }
e3b90ca2 611
f142c6b9
JB		 612 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
613 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 614 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 615
c405c629
JB		 616 switch (sdata->vif.type) {
617 case NL80211_IFTYPE_STATION:
618 case NL80211_IFTYPE_ADHOC:
619 case NL80211_IFTYPE_AP:
620 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 621 netif_carrier_off(dev);
c405c629 622 break;
1411af15 623 case NL80211_IFTYPE_WDS:
f142c6b9 624 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 625 break;
c405c629 626 default:
a2310824
JB		 627 /* not reached */
628 WARN_ON(1);
c405c629 629 }
59034591
EP		 630
631 /*
632 * set default queue parameters so drivers don't
633 * need to initialise the hardware if the hardware
634 * doesn't start up with sane defaults
635 */
3abead59 636 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 637 }
638
2d2080c3
JB		 639 set_bit(SDATA_STATE_RUNNING, &sdata->state);
640
0d143fe1
JB		 641 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
642 /* Create STA entry for the WDS peer */
643 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
644 GFP_KERNEL);
645 if (!sta) {
646 res = -ENOMEM;
647 goto err_del_interface;
648 }
649
83d5cc01
JB		 650 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
651 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
652 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 653
654 res = sta_info_insert(sta);
655 if (res) {
656 /* STA has been freed */
657 goto err_del_interface;
658 }
1be7fe8d
BJ		 659
660 rate_control_rate_init(sta);
1411af15 661 netif_carrier_on(dev);
f142c6b9
JB		 662 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
663 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 664 }
665
0d143fe1
JB		 666 /*
667 * set_multicast_list will be invoked by the networking core
668 * which will check whether any increments here were done in
669 * error and sync them down to the hardware as filter flags.
670 */
671 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
672 atomic_inc(&local->iff_allmultis);
673
674 if (sdata->flags & IEEE80211_SDATA_PROMISC)
675 atomic_inc(&local->iff_promiscs);
676
34d4bc4d
JB		 677 if (coming_up)
678 local->open_count++;
679
59034591 680 if (hw_reconf_flags)
e8975581 681 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 682
10f644a4 683 ieee80211_recalc_ps(local, -1);
965bedad 684
2b436312
JB		 685 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
686 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
687 /* XXX: for AP_VLAN, actually track AP queues */
688 netif_tx_start_all_queues(dev);
689 } else if (dev) {
2b730daa
JB		 690 unsigned long flags;
691 int n_acs = IEEE80211_NUM_ACS;
692 int ac;
693
694 if (local->hw.queues < IEEE80211_NUM_ACS)
695 n_acs = 1;
696
697 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
698 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
699 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
700 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
701 for (ac = 0; ac < n_acs; ac++) {
702 int ac_queue = sdata->vif.hw_queue[ac];
703
704 if (local->queue_stop_reasons[ac_queue] == 0 &&
705 skb_queue_empty(&local->pending[ac_queue]))
706 netif_start_subqueue(dev, ac);
707 }
708 }
709 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
710 }
0d143fe1
JB		 711
712 return 0;
713 err_del_interface:
7b7eab6f 714 drv_remove_interface(local, sdata);
0d143fe1 715 err_stop:
24487981
JB		 716 if (!local->open_count)
717 drv_stop(local);
0d143fe1
JB		 718 err_del_bss:
719 sdata->bss = NULL;
720 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
721 list_del(&sdata->u.vlan.list);
4d6c36fa 722 /* might already be clear but that doesn't matter */
2d2080c3 723 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 724 return res;
725}
726
34d4bc4d 727static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 728{
729 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 730 int err;
731
732 /* fail early if user set an invalid address */
2fcf2824 733 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 734 return -EADDRNOTAVAIL;
735
736 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
737 if (err)
738 return err;
739
f142c6b9 740 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 741}
742
743static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
744 bool going_down)
745{
0d143fe1 746 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 747 unsigned long flags;
748 struct sk_buff *skb, *tmp;
e8975581 749 u32 hw_reconf_flags = 0;
09f4114e 750 int i, flushed;
397a7a24 751 struct ps_data *ps;
d2859df5 752 struct cfg80211_chan_def chandef;
0d143fe1 753
c29acf20
RM		 754 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
755
e2fd5dbc 756 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 757 ieee80211_scan_cancel(local);
758
0d143fe1
JB		 759 /*
760 * Stop TX on this interface first.
761 */
f142c6b9
JB		 762 if (sdata->dev)
763 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 764
c8f994ee 765 ieee80211_roc_purge(local, sdata);
af6b6374 766
572078be
JB		 767 if (sdata->vif.type == NL80211_IFTYPE_STATION)
768 ieee80211_mgd_stop(sdata);
769
cd7760e6
SW		 770 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
771 ieee80211_ibss_stop(sdata);
772
773
0d143fe1
JB		 774 /*
775 * Remove all stations associated with this interface.
776 *
777 * This must be done before calling ops->remove_interface()
778 * because otherwise we can later invoke ops->sta_notify()
779 * whenever the STAs are removed, and that invalidates driver
780 * assumptions about always getting a vif pointer that is valid
781 * (because if we remove a STA after ops->remove_interface()
782 * the driver will have removed the vif info already!)
783 *
09f4114e
JB		 784 * This is relevant only in WDS mode, in all other modes we've
785 * already removed all stations when disconnecting or similar,
786 * so warn otherwise.
051007d9
JB		 787 *
788 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 789 */
051007d9 790 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 791 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
792 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 793
afdc7c18 794 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 795 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
796 atomic_dec(&local->iff_allmultis);
797
798 if (sdata->flags & IEEE80211_SDATA_PROMISC)
799 atomic_dec(&local->iff_promiscs);
800
7be5086d 801 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 802 local->fif_pspoll--;
7be5086d
JB		 803 local->fif_probe_req--;
804 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
805 local->fif_probe_req--;
806 }
e3b90ca2 807
f142c6b9
JB		 808 if (sdata->dev) {
809 netif_addr_lock_bh(sdata->dev);
810 spin_lock_bh(&local->filter_lock);
811 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
812 sdata->dev->addr_len);
813 spin_unlock_bh(&local->filter_lock);
814 netif_addr_unlock_bh(sdata->dev);
f142c6b9 815 }
3ac64bee 816
7cbf0ba5
VN		 817 del_timer_sync(&local->dynamic_ps_timer);
818 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 819
04ecd257 820 cancel_work_sync(&sdata->recalc_smps);
73da7d5b
SW		 821 sdata->vif.csa_active = false;
822 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 823
164eb02d
SW		 824 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
825
826 if (sdata->wdev.cac_started) {
d2859df5 827 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 828 WARN_ON(local->suspended);
164eb02d
SW		 829 mutex_lock(&local->iflist_mtx);
830 ieee80211_vif_release_channel(sdata);
831 mutex_unlock(&local->iflist_mtx);
d2859df5
JD		 832 cfg80211_cac_event(sdata->dev, &chandef,
833 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 834 GFP_KERNEL);
835 }
836
0d143fe1
JB		 837 /* APs need special treatment */
838 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 839 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 840
841 /* down all dependent devices, that is VLANs */
57c9fff3 842 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 843 u.vlan.list)
844 dev_close(vlan->dev);
845 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 846 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
847 /* remove all packets in parent bc_buf pointing to this dev */
848 ps = &sdata->bss->ps;
849
850 spin_lock_irqsave(&ps->bc_buf.lock, flags);
851 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
852 if (skb->dev == sdata->dev) {
853 __skb_unlink(skb, &ps->bc_buf);
854 local->total_ps_buffered--;
855 ieee80211_free_txskb(&local->hw, skb);
856 }
857 }
858 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 859 }
860
34d4bc4d
JB		 861 if (going_down)
862 local->open_count--;
0d143fe1
JB		 863
864 switch (sdata->vif.type) {
865 case NL80211_IFTYPE_AP_VLAN:
866 list_del(&sdata->u.vlan.list);
4d76d21b 867 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 868 /* no need to tell driver */
869 break;
870 case NL80211_IFTYPE_MONITOR:
871 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
872 local->cooked_mntrs--;
873 break;
874 }
875
876 local->monitors--;
e8975581 877 if (local->monitors == 0) {
0869aea0
JB		 878 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
879 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 880 }
0d143fe1 881
85416a4f 882 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 883 break;
f142c6b9
JB		 884 case NL80211_IFTYPE_P2P_DEVICE:
885 /* relies on synchronize_rcu() below */
886 rcu_assign_pointer(local->p2p_sdata, NULL);
887 /* fall through */
0d143fe1 888 default:
0b7dff4f 889 cancel_work_sync(&sdata->work);
35f20c14
JB		 890 /*
891 * When we get here, the interface is marked down.
75de9113
JB		 892 *
893 * sta_info_flush_cleanup() requires rcu_barrier()
894 * first to wait for the station call_rcu() calls
8ceb5955
BC		 895 * to complete, and we also need synchronize_rcu()
896 * to wait for the RX path in case it is using the
75de9113
JB		 897 * interface and enqueuing frames at this very time on
898 * another CPU.
35f20c14 899 */
8ceb5955 900 synchronize_rcu();
75de9113 901 rcu_barrier();
051007d9
JB		 902 sta_info_flush_cleanup(sdata);
903
b9dcf712
JB		 904 /*
905 * Free all remaining keys, there shouldn't be any,
7b4396bd 906 * except maybe in WDS mode?
b9dcf712 907 */
ad0e2b5a 908 ieee80211_free_keys(sdata);
b9dcf712 909
1861b845
JB		 910 /* fall through */
911 case NL80211_IFTYPE_AP:
912 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 913 }
914
915 sdata->bss = NULL;
916
5061b0c2
JB		 917 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
918 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
919 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
920 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
921 if (info->control.vif == &sdata->vif) {
922 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 923 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 924 }
925 }
926 }
927 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 928
b2c0958b
JB		 929 if (local->open_count == 0)
930 ieee80211_clear_tx_pending(local);
931
932 /*
933 * If the interface goes down while suspended, presumably because
934 * the device was unplugged and that happens before our resume,
935 * then the driver is already unconfigured and the remainder of
936 * this function isn't needed.
937 * XXX: what about WoWLAN? If the device has software state, e.g.
938 * memory allocated, it might expect teardown commands from
939 * mac80211 here?
940 */
941 if (local->suspended) {
942 WARN_ON(local->wowlan);
943 WARN_ON(rtnl_dereference(local->monitor_sdata));
944 return;
945 }
946
947 switch (sdata->vif.type) {
948 case NL80211_IFTYPE_AP_VLAN:
949 break;
950 case NL80211_IFTYPE_MONITOR:
951 if (local->monitors == 0)
952 ieee80211_del_virtual_monitor(local);
953
954 mutex_lock(&local->mtx);
955 ieee80211_recalc_idle(local);
956 mutex_unlock(&local->mtx);
31eba5bc
FF		 957
958 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
959 break;
960
961 /* fall through */
b2c0958b
JB		 962 default:
963 if (going_down)
964 drv_remove_interface(local, sdata);
965 }
966
967 ieee80211_recalc_ps(local, -1);
968
969 if (local->open_count == 0) {
970 ieee80211_stop_device(local);
971
972 /* no reconfiguring after stop! */
973 return;
974 }
975
976 /* do after stop to avoid reconfiguring when we stop anyway */
977 ieee80211_configure_filter(local);
978 ieee80211_hw_config(local, hw_reconf_flags);
979
980 if (local->monitors == local->open_count)
075e0847 981 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 982}
983
984static int ieee80211_stop(struct net_device *dev)
985{
986 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
987
988 ieee80211_do_stop(sdata, true);
5061b0c2 989
0d143fe1
JB		 990 return 0;
991}
992
993static void ieee80211_set_multicast_list(struct net_device *dev)
994{
0d143fe1 995 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 996 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 997 int allmulti, promisc, sdata_allmulti, sdata_promisc;
998
999 allmulti = !!(dev->flags & IFF_ALLMULTI);
1000 promisc = !!(dev->flags & IFF_PROMISC);
1001 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1002 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1003
1004 if (allmulti != sdata_allmulti) {
1005 if (dev->flags & IFF_ALLMULTI)
1006 atomic_inc(&local->iff_allmultis);
1007 else
1008 atomic_dec(&local->iff_allmultis);
1009 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1010 }
1011
1012 if (promisc != sdata_promisc) {
1013 if (dev->flags & IFF_PROMISC)
1014 atomic_inc(&local->iff_promiscs);
1015 else
1016 atomic_dec(&local->iff_promiscs);
1017 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1018 }
488b366a
AB		 1019
1020 /*
1021 * TODO: If somebody needs this on AP interfaces,
1022 * it can be enabled easily but multicast
1023 * addresses from VLANs need to be synced.
1024 */
1025 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1026 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1027 sdata->vif.type != NL80211_IFTYPE_AP)
1028 drv_set_multicast_list(local, sdata, &dev->mc);
1029
3b8d81e0 1030 spin_lock_bh(&local->filter_lock);
22bedad3 1031 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1032 spin_unlock_bh(&local->filter_lock);
3ac64bee 1033 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1034}
1035
75636525
JB		 1036/*
1037 * Called when the netdev is removed or, by the code below, before
1038 * the interface type changes.
1039 */
f142c6b9 1040static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82 1041{
75636525 1042 int flushed;
f0706e82
JB		 1043 int i;
1044
75636525
JB		 1045 /* free extra data */
1046 ieee80211_free_keys(sdata);
1047
aee14ceb
JM		 1048 ieee80211_debugfs_remove_netdev(sdata);
1049
f0706e82 1050 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1051 __skb_queue_purge(&sdata->fragments[i].skb_list);
1052 sdata->fragment_next = 0;
11a843b7 1053
b9dcf712
JB		 1054 if (ieee80211_vif_is_mesh(&sdata->vif))
1055 mesh_rmc_free(sdata);
75636525 1056
b998e8bb 1057 flushed = sta_info_flush(sdata);
75636525 1058 WARN_ON(flushed);
f0706e82
JB		 1059}
1060
f142c6b9
JB		 1061static void ieee80211_uninit(struct net_device *dev)
1062{
1063 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1064}
1065
cf0277e7
JB		 1066static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1067 struct sk_buff *skb)
1068{
1069 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1070}
1071
587e729e
JB		 1072static const struct net_device_ops ieee80211_dataif_ops = {
1073 .ndo_open = ieee80211_open,
1074 .ndo_stop = ieee80211_stop,
f142c6b9 1075 .ndo_uninit = ieee80211_uninit,
587e729e 1076 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1077 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1078 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1079 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1080 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1081};
1082
cf0277e7
JB		 1083static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1084 struct sk_buff *skb)
1085{
1086 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1087 struct ieee80211_local *local = sdata->local;
1088 struct ieee80211_hdr *hdr;
1089 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1090
32c5057b 1091 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1092 return 0;
1093
1094 if (skb->len < 4 ||
b49bb574 1095 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1096 return 0; /* doesn't matter, frame will be dropped */
1097
b49bb574 1098 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1099
00e96dec 1100 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1101}
1102
587e729e
JB		 1103static const struct net_device_ops ieee80211_monitorif_ops = {
1104 .ndo_open = ieee80211_open,
1105 .ndo_stop = ieee80211_stop,
f142c6b9 1106 .ndo_uninit = ieee80211_uninit,
587e729e 1107 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1108 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1109 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1110 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1111 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1112};
1113
1114static void ieee80211_if_setup(struct net_device *dev)
1115{
1116 ether_setup(dev);
550fd08c 1117 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1118 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1119 dev->destructor = free_netdev;
1120}
1121
1fa57d01
JB		 1122static void ieee80211_iface_work(struct work_struct *work)
1123{
1124 struct ieee80211_sub_if_data *sdata =
1125 container_of(work, struct ieee80211_sub_if_data, work);
1126 struct ieee80211_local *local = sdata->local;
1127 struct sk_buff *skb;
344eec67 1128 struct sta_info *sta;
c1475ca9 1129 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1130
1131 if (!ieee80211_sdata_running(sdata))
1132 return;
1133
1134 if (local->scanning)
1135 return;
1136
1137 /*
1138 * ieee80211_queue_work() should have picked up most cases,
1139 * here we'll pick the rest.
1140 */
1141 if (WARN(local->suspended,
1142 "interface work scheduled while going to suspend\n"))
1143 return;
1144
1145 /* first process frames */
1146 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1147 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1148
c1475ca9
JB		 1149 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1150 ra_tid = (void *)&skb->cb;
1151 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1152 ra_tid->tid);
1153 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1154 ra_tid = (void *)&skb->cb;
1155 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1156 ra_tid->tid);
1157 } else if (ieee80211_is_action(mgmt->frame_control) &&
1158 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1159 int len = skb->len;
bed7ee6e 1160
a93e3644 1161 mutex_lock(&local->sta_mtx);
875ae5f6 1162 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1163 if (sta) {
1164 switch (mgmt->u.action.u.addba_req.action_code) {
1165 case WLAN_ACTION_ADDBA_REQ:
1166 ieee80211_process_addba_request(
1167 local, sta, mgmt, len);
1168 break;
1169 case WLAN_ACTION_ADDBA_RESP:
1170 ieee80211_process_addba_resp(local, sta,
1171 mgmt, len);
1172 break;
1173 case WLAN_ACTION_DELBA:
1174 ieee80211_process_delba(sdata, sta,
1175 mgmt, len);
1176 break;
1177 default:
1178 WARN_ON(1);
1179 break;
1180 }
1181 }
a93e3644 1182 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1183 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1184 struct ieee80211_hdr *hdr = (void *)mgmt;
1185 /*
1186 * So the frame isn't mgmt, but frame_control
1187 * is at the right place anyway, of course, so
1188 * the if statement is correct.
1189 *
1190 * Warn if we have other data frame types here,
1191 * they must not get here.
1192 */
1193 WARN_ON(hdr->frame_control &
1194 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1195 WARN_ON(!(hdr->seq_ctrl &
1196 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1197 /*
1198 * This was a fragment of a frame, received while
1199 * a block-ack session was active. That cannot be
1200 * right, so terminate the session.
1201 */
a93e3644 1202 mutex_lock(&local->sta_mtx);
875ae5f6 1203 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1204 if (sta) {
1205 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1206 IEEE80211_QOS_CTL_TID_MASK;
1207
1208 __ieee80211_stop_rx_ba_session(
1209 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1210 WLAN_REASON_QSTA_REQUIRE_SETUP,
1211 true);
344eec67 1212 }
a93e3644 1213 mutex_unlock(&local->sta_mtx);
bed7ee6e 1214 } else switch (sdata->vif.type) {
1fa57d01
JB		 1215 case NL80211_IFTYPE_STATION:
1216 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1217 break;
1218 case NL80211_IFTYPE_ADHOC:
1219 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1220 break;
1221 case NL80211_IFTYPE_MESH_POINT:
1222 if (!ieee80211_vif_is_mesh(&sdata->vif))
1223 break;
1224 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1225 break;
1226 default:
1227 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1228 break;
1229 }
36b3a628
JB		 1230
1231 kfree_skb(skb);
1fa57d01
JB		 1232 }
1233
1234 /* then other type-dependent work */
1235 switch (sdata->vif.type) {
1236 case NL80211_IFTYPE_STATION:
1237 ieee80211_sta_work(sdata);
1238 break;
1239 case NL80211_IFTYPE_ADHOC:
1240 ieee80211_ibss_work(sdata);
1241 break;
1242 case NL80211_IFTYPE_MESH_POINT:
1243 if (!ieee80211_vif_is_mesh(&sdata->vif))
1244 break;
1245 ieee80211_mesh_work(sdata);
1246 break;
1247 default:
1248 break;
1249 }
1250}
1251
04ecd257
JB		 1252static void ieee80211_recalc_smps_work(struct work_struct *work)
1253{
1254 struct ieee80211_sub_if_data *sdata =
1255 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1256
1257 ieee80211_recalc_smps(sdata);
1258}
1fa57d01 1259
75636525
JB		 1260/*
1261 * Helper function to initialise an interface to a specific type.
1262 */
1263static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1264 enum nl80211_iftype type)
f0706e82 1265{
75636525
JB		 1266 /* clear type-dependent union */
1267 memset(&sdata->u, 0, sizeof(sdata->u));
1268
1269 /* and set some type-dependent values */
1270 sdata->vif.type = type;
2ca27bcf 1271 sdata->vif.p2p = false;
60719ffd 1272 sdata->wdev.iftype = type;
75636525 1273
a621fa4d
JB		 1274 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1275 sdata->control_port_no_encrypt = false;
1276
b53be792
SW		 1277 sdata->noack_map = 0;
1278
f142c6b9
JB		 1279 /* only monitor/p2p-device differ */
1280 if (sdata->dev) {
1281 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1282 sdata->dev->type = ARPHRD_ETHER;
1283 }
75636525 1284
35f20c14 1285 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1286 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1287 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1288 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1289
75636525 1290 switch (type) {
2ca27bcf
JB		 1291 case NL80211_IFTYPE_P2P_GO:
1292 type = NL80211_IFTYPE_AP;
1293 sdata->vif.type = type;
1294 sdata->vif.p2p = true;
1295 /* fall through */
05c914fe 1296 case NL80211_IFTYPE_AP:
d012a605 1297 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1298 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1299 INIT_WORK(&sdata->u.ap.request_smps_work,
1300 ieee80211_request_smps_ap_work);
ad2d223a 1301 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1302 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1303 break;
2ca27bcf
JB		 1304 case NL80211_IFTYPE_P2P_CLIENT:
1305 type = NL80211_IFTYPE_STATION;
1306 sdata->vif.type = type;
1307 sdata->vif.p2p = true;
1308 /* fall through */
05c914fe 1309 case NL80211_IFTYPE_STATION:
ad2d223a 1310 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1311 ieee80211_sta_setup_sdata(sdata);
472dbc45 1312 break;
46900298 1313 case NL80211_IFTYPE_ADHOC:
ad2d223a 1314 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1315 ieee80211_ibss_setup_sdata(sdata);
1316 break;
05c914fe 1317 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1318 if (ieee80211_vif_is_mesh(&sdata->vif))
1319 ieee80211_mesh_init_sdata(sdata);
1320 break;
05c914fe 1321 case NL80211_IFTYPE_MONITOR:
75636525 1322 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1323 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1324 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1325 MONITOR_FLAG_OTHER_BSS;
1326 break;
05c914fe 1327 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1328 sdata->vif.bss_conf.bssid = NULL;
1329 break;
05c914fe 1330 case NL80211_IFTYPE_AP_VLAN:
ad2d223a 1331 break;
98104fde 1332 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1333 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1334 break;
05c914fe 1335 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1336 case NUM_NL80211_IFTYPES:
75636525
JB		 1337 BUG();
1338 break;
1339 }
1340
1341 ieee80211_debugfs_add_netdev(sdata);
1342}
1343
34d4bc4d
JB		 1344static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1345 enum nl80211_iftype type)
1346{
1347 struct ieee80211_local *local = sdata->local;
1348 int ret, err;
2ca27bcf
JB		 1349 enum nl80211_iftype internal_type = type;
1350 bool p2p = false;
34d4bc4d
JB		 1351
1352 ASSERT_RTNL();
1353
1354 if (!local->ops->change_interface)
1355 return -EBUSY;
1356
1357 switch (sdata->vif.type) {
1358 case NL80211_IFTYPE_AP:
1359 case NL80211_IFTYPE_STATION:
1360 case NL80211_IFTYPE_ADHOC:
1361 /*
1362 * Could maybe also all others here?
1363 * Just not sure how that interacts
1364 * with the RX/config path e.g. for
1365 * mesh.
1366 */
1367 break;
1368 default:
1369 return -EBUSY;
1370 }
1371
1372 switch (type) {
1373 case NL80211_IFTYPE_AP:
1374 case NL80211_IFTYPE_STATION:
1375 case NL80211_IFTYPE_ADHOC:
1376 /*
1377 * Could probably support everything
1378 * but WDS here (WDS do_open can fail
1379 * under memory pressure, which this
1380 * code isn't prepared to handle).
1381 */
1382 break;
2ca27bcf
JB		 1383 case NL80211_IFTYPE_P2P_CLIENT:
1384 p2p = true;
1385 internal_type = NL80211_IFTYPE_STATION;
1386 break;
1387 case NL80211_IFTYPE_P2P_GO:
1388 p2p = true;
1389 internal_type = NL80211_IFTYPE_AP;
1390 break;
34d4bc4d
JB		 1391 default:
1392 return -EBUSY;
1393 }
1394
2ca27bcf 1395 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1396 if (ret)
1397 return ret;
1398
1399 ieee80211_do_stop(sdata, false);
1400
f142c6b9 1401 ieee80211_teardown_sdata(sdata);
34d4bc4d 1402
2ca27bcf 1403 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1404 if (ret)
a9865538 1405 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1406
3a25a8c8
JB		 1407 /*
1408 * Ignore return value here, there's not much we can do since
1409 * the driver changed the interface type internally already.
1410 * The warnings will hopefully make driver authors fix it :-)
1411 */
a9865538 1412 ieee80211_check_queues(sdata, type);
3a25a8c8 1413
34d4bc4d
JB		 1414 ieee80211_setup_sdata(sdata, type);
1415
f142c6b9 1416 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1417 WARN(err, "type change: do_open returned %d", err);
1418
1419 return ret;
1420}
1421
f3947e2d 1422int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1423 enum nl80211_iftype type)
75636525 1424{
34d4bc4d
JB		 1425 int ret;
1426
f3947e2d
JB		 1427 ASSERT_RTNL();
1428
2ca27bcf 1429 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1430 return 0;
1431
34d4bc4d
JB		 1432 if (ieee80211_sdata_running(sdata)) {
1433 ret = ieee80211_runtime_change_iftype(sdata, type);
1434 if (ret)
1435 return ret;
1436 } else {
1437 /* Purge and reset type-dependent state. */
f142c6b9 1438 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1439 ieee80211_setup_sdata(sdata, type);
1440 }
75636525
JB		 1441
1442 /* reset some values that shouldn't be kept across type changes */
75636525 1443 sdata->drop_unencrypted = 0;
9bc383de
JB		 1444 if (type == NL80211_IFTYPE_STATION)
1445 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1446
1447 return 0;
f0706e82
JB		 1448}
1449
fa9029f8 1450static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1451 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1452{
1453 struct ieee80211_sub_if_data *sdata;
1454 u64 mask, start, addr, val, inc;
1455 u8 *m;
1456 u8 tmp_addr[ETH_ALEN];
1457 int i;
1458
1459 /* default ... something at least */
f142c6b9 1460 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1461
1462 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1463 local->hw.wiphy->n_addresses <= 1)
1464 return;
1465
fa9029f8
JB		 1466 mutex_lock(&local->iflist_mtx);
1467
1468 switch (type) {
1469 case NL80211_IFTYPE_MONITOR:
1470 /* doesn't matter */
1471 break;
1472 case NL80211_IFTYPE_WDS:
1473 case NL80211_IFTYPE_AP_VLAN:
1474 /* match up with an AP interface */
1475 list_for_each_entry(sdata, &local->interfaces, list) {
1476 if (sdata->vif.type != NL80211_IFTYPE_AP)
1477 continue;
f142c6b9 1478 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1479 break;
1480 }
1481 /* keep default if no AP interface present */
1482 break;
6d71117a
JB		 1483 case NL80211_IFTYPE_P2P_CLIENT:
1484 case NL80211_IFTYPE_P2P_GO:
1485 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1486 list_for_each_entry(sdata, &local->interfaces, list) {
1487 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1488 continue;
1489 if (!ieee80211_sdata_running(sdata))
1490 continue;
1491 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1492 goto out_unlock;
1493 }
1494 }
1495 /* otherwise fall through */
fa9029f8
JB		 1496 default:
1497 /* assign a new address if possible -- try n_addresses first */
1498 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1499 bool used = false;
1500
1501 list_for_each_entry(sdata, &local->interfaces, list) {
1502 if (memcmp(local->hw.wiphy->addresses[i].addr,
1503 sdata->vif.addr, ETH_ALEN) == 0) {
1504 used = true;
1505 break;
1506 }
1507 }
1508
1509 if (!used) {
f142c6b9 1510 memcpy(perm_addr,
fa9029f8
JB		 1511 local->hw.wiphy->addresses[i].addr,
1512 ETH_ALEN);
1513 break;
1514 }
1515 }
1516
1517 /* try mask if available */
1518 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1519 break;
1520
1521 m = local->hw.wiphy->addr_mask;
1522 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1523 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1524 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1525
1526 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1527 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1528 pr_info("not contiguous\n");
fa9029f8
JB		 1529 break;
1530 }
1531
ac20976d
HS		 1532 /*
1533 * Pick address of existing interface in case user changed
1534 * MAC address manually, default to perm_addr.
1535 */
fa9029f8 1536 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1537 list_for_each_entry(sdata, &local->interfaces, list) {
1538 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1539 continue;
1540 m = sdata->vif.addr;
1541 break;
1542 }
fa9029f8
JB		 1543 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1544 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1545 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1546
1547 inc = 1ULL<<__ffs64(mask);
1548 val = (start & mask);
1549 addr = (start & ~mask) | (val & mask);
1550 do {
1551 bool used = false;
1552
1553 tmp_addr[5] = addr >> 0*8;
1554 tmp_addr[4] = addr >> 1*8;
1555 tmp_addr[3] = addr >> 2*8;
1556 tmp_addr[2] = addr >> 3*8;
1557 tmp_addr[1] = addr >> 4*8;
1558 tmp_addr[0] = addr >> 5*8;
1559
1560 val += inc;
1561
1562 list_for_each_entry(sdata, &local->interfaces, list) {
1563 if (memcmp(tmp_addr, sdata->vif.addr,
1564 ETH_ALEN) == 0) {
1565 used = true;
1566 break;
1567 }
1568 }
1569
1570 if (!used) {
f142c6b9 1571 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1572 break;
1573 }
1574 addr = (start & ~mask) | (val & mask);
1575 } while (addr != start);
1576
1577 break;
1578 }
1579
6d71117a 1580 out_unlock:
fa9029f8
JB		 1581 mutex_unlock(&local->iflist_mtx);
1582}
1583
97f97b1f
JB		 1584static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1585{
1586 struct ieee80211_sub_if_data *sdata;
1587
1588 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1589
1590 ieee80211_cleanup_sdata_stas(sdata);
1591}
1592
3e122be0 1593int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1594 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1595 struct vif_params *params)
f0706e82 1596{
f142c6b9 1597 struct net_device *ndev = NULL;
f0706e82 1598 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1599 int ret, i;
ded81f6b 1600 int txqs = 1;
f0706e82
JB		 1601
1602 ASSERT_RTNL();
75636525 1603
f142c6b9
JB		 1604 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1605 struct wireless_dev *wdev;
1606
1607 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1608 GFP_KERNEL);
1609 if (!sdata)
1610 return -ENOMEM;
1611 wdev = &sdata->wdev;
1612
1613 sdata->dev = NULL;
1614 strlcpy(sdata->name, name, IFNAMSIZ);
1615 ieee80211_assign_perm_addr(local, wdev->address, type);
1616 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1617 } else {
1618 if (local->hw.queues >= IEEE80211_NUM_ACS)
1619 txqs = IEEE80211_NUM_ACS;
1620
1621 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1622 local->hw.vif_data_size,
1623 name, ieee80211_if_setup, txqs, 1);
1624 if (!ndev)
1625 return -ENOMEM;
1626 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1627
1628 ndev->needed_headroom = local->tx_headroom +
1629 4*6 /* four MAC addresses */
1630 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1631 + 6 /* mesh */
1632 + 8 /* rfc1042/bridge tunnel */
1633 - ETH_HLEN /* ethernet hard_header_len */
1634 + IEEE80211_ENCRYPT_HEADROOM;
1635 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1636
1637 ret = dev_alloc_name(ndev, ndev->name);
1638 if (ret < 0) {
1639 free_netdev(ndev);
1640 return ret;
1641 }
1642
1643 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1644 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1645 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1646
1647 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1648 sdata = netdev_priv(ndev);
1649 ndev->ieee80211_ptr = &sdata->wdev;
1650 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1651 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1652
1653 sdata->dev = ndev;
1654 }
75636525
JB		 1655
1656 /* initialise type-independent data */
f0706e82 1657 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1658 sdata->local = local;
75636525
JB		 1659
1660 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1661 skb_queue_head_init(&sdata->fragments[i].skb_list);
1662
1663 INIT_LIST_HEAD(&sdata->key_list);
1664
97f97b1f
JB		 1665 spin_lock_init(&sdata->cleanup_stations_lock);
1666 INIT_LIST_HEAD(&sdata->cleanup_stations);
1667 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1668 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1669 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1670 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1671 ieee80211_delayed_tailroom_dec);
97f97b1f 1672
37eb0b16
JM		 1673 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1674 struct ieee80211_supported_band *sband;
1675 sband = local->hw.wiphy->bands[i];
1676 sdata->rc_rateidx_mask[i] =
1677 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1678 if (sband)
1679 memcpy(sdata->rc_rateidx_mcs_mask[i],
1680 sband->ht_cap.mcs.rx_mask,
1681 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1682 else
1683 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1684 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1685 }
75636525 1686
3a25a8c8
JB		 1687 ieee80211_set_default_queues(sdata);
1688
1ea6f9c0
JB		 1689 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1690 sdata->user_power_level = local->user_power_level;
1691
75636525
JB		 1692 /* setup type-dependent data */
1693 ieee80211_setup_sdata(sdata, type);
f0706e82 1694
f142c6b9
JB		 1695 if (ndev) {
1696 if (params) {
1697 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1698 if (type == NL80211_IFTYPE_STATION)
1699 sdata->u.mgd.use_4addr = params->use_4addr;
1700 }
9bc383de 1701
f142c6b9 1702 ndev->features |= local->hw.netdev_features;
72d78728 1703
f142c6b9
JB		 1704 ret = register_netdevice(ndev);
1705 if (ret) {
1706 free_netdev(ndev);
1707 return ret;
1708 }
1709 }
f0706e82 1710
c771c9d8 1711 mutex_lock(&local->iflist_mtx);
79010420 1712 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1713 mutex_unlock(&local->iflist_mtx);
79010420 1714
84efbb84
JB		 1715 if (new_wdev)
1716 *new_wdev = &sdata->wdev;
f0706e82 1717
f0706e82 1718 return 0;
f0706e82
JB		 1719}
1720
f698d856 1721void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1722{
f0706e82 1723 ASSERT_RTNL();
11a843b7 1724
c771c9d8 1725 mutex_lock(&sdata->local->iflist_mtx);
75636525 1726 list_del_rcu(&sdata->list);
c771c9d8
JB		 1727 mutex_unlock(&sdata->local->iflist_mtx);
1728
75636525 1729 synchronize_rcu();
f142c6b9
JB		 1730
1731 if (sdata->dev) {
1732 unregister_netdevice(sdata->dev);
1733 } else {
1734 cfg80211_unregister_wdev(&sdata->wdev);
1735 kfree(sdata);
1736 }
1737}
1738
1739void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1740{
1741 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1742 return;
1743 ieee80211_do_stop(sdata, true);
1744 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1745}
1746
75636525
JB		 1747/*
1748 * Remove all interfaces, may only be called at hardware unregistration
1749 * time because it doesn't do RCU-safe list removals.
1750 */
1751void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1752{
75636525 1753 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1754 LIST_HEAD(unreg_list);
f142c6b9 1755 LIST_HEAD(wdev_list);
f0706e82
JB		 1756
1757 ASSERT_RTNL();
1758
c8aa22db
JB		 1759 /*
1760 * Close all AP_VLAN interfaces first, as otherwise they
1761 * might be closed while the AP interface they belong to
1762 * is closed, causing unregister_netdevice_many() to crash.
1763 */
1764 list_for_each_entry(sdata, &local->interfaces, list)
1765 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1766 dev_close(sdata->dev);
1767
efe117ab 1768 mutex_lock(&local->iflist_mtx);
75636525
JB		 1769 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1770 list_del(&sdata->list);
c771c9d8 1771
f142c6b9
JB		 1772 if (sdata->dev)
1773 unregister_netdevice_queue(sdata->dev, &unreg_list);
1774 else
1775 list_add(&sdata->list, &wdev_list);
f0706e82 1776 }
efe117ab
ED		 1777 mutex_unlock(&local->iflist_mtx);
1778 unregister_netdevice_many(&unreg_list);
5f04d506 1779 list_del(&unreg_list);
f142c6b9
JB		 1780
1781 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1782 list_del(&sdata->list);
1783 cfg80211_unregister_wdev(&sdata->wdev);
1784 kfree(sdata);
1785 }
f0706e82 1786}
5cff20e6 1787
47846c9b 1788static int netdev_notify(struct notifier_block *nb,
351638e7 1789 unsigned long state, void *ptr)
47846c9b 1790{
351638e7 1791 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1792 struct ieee80211_sub_if_data *sdata;
1793
1794 if (state != NETDEV_CHANGENAME)
1795 return 0;
1796
1797 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1798 return 0;
1799
1800 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1801 return 0;
1802
1803 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1804
2f5265e6 1805 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1806
1807 ieee80211_debugfs_rename_netdev(sdata);
1808 return 0;
1809}
1810
1811static struct notifier_block mac80211_netdev_notifier = {
1812 .notifier_call = netdev_notify,
1813};
1814
1815int ieee80211_iface_init(void)
1816{
1817 return register_netdevice_notifier(&mac80211_netdev_notifier);
1818}
1819
1820void ieee80211_iface_exit(void)
1821{
1822 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1823}
Linux 6.x block layer and io_uring tree(s)