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mac80211: move 4-addr sta pointer clearing before synchronize_rcu()
[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
2475b1cc
MS		 404 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
405
3a25a8c8
JB		 406 ieee80211_set_default_queues(sdata);
407
4b6f1dd6
JB		 408 ret = drv_add_interface(local, sdata);
409 if (WARN_ON(ret)) {
410 /* ok .. stupid driver, it asked for this! */
411 kfree(sdata);
8b305780 412 return ret;
4b6f1dd6
JB		 413 }
414
a9865538 415 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
3a25a8c8
JB		 416 if (ret) {
417 kfree(sdata);
8b305780 418 return ret;
3a25a8c8
JB		 419 }
420
4bf88530 421 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
55de908a
JB		 422 IEEE80211_CHANCTX_EXCLUSIVE);
423 if (ret) {
424 drv_remove_interface(local, sdata);
425 kfree(sdata);
8b305780 426 return ret;
55de908a
JB		 427 }
428
8b305780 429 mutex_lock(&local->iflist_mtx);
4b6f1dd6 430 rcu_assign_pointer(local->monitor_sdata, sdata);
685fb72b 431 mutex_unlock(&local->iflist_mtx);
8b305780
JB		 432
433 return 0;
4b6f1dd6
JB		 434}
435
3c3e21e7 436void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
4b6f1dd6
JB		 437{
438 struct ieee80211_sub_if_data *sdata;
439
440 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
441 return;
442
8b305780
JB		 443 ASSERT_RTNL();
444
685fb72b 445 mutex_lock(&local->iflist_mtx);
4b6f1dd6 446
685fb72b
JB		 447 sdata = rcu_dereference_protected(local->monitor_sdata,
448 lockdep_is_held(&local->iflist_mtx));
8b305780
JB		 449 if (!sdata) {
450 mutex_unlock(&local->iflist_mtx);
451 return;
452 }
4b6f1dd6
JB		 453
454 rcu_assign_pointer(local->monitor_sdata, NULL);
8b305780
JB		 455 mutex_unlock(&local->iflist_mtx);
456
4b6f1dd6
JB		 457 synchronize_net();
458
55de908a
JB		 459 ieee80211_vif_release_channel(sdata);
460
4b6f1dd6
JB		 461 drv_remove_interface(local, sdata);
462
463 kfree(sdata);
464}
465
34d4bc4d
JB		 466/*
467 * NOTE: Be very careful when changing this function, it must NOT return
468 * an error on interface type changes that have been pre-checked, so most
469 * checks should be in ieee80211_check_concurrent_iface.
470 */
f142c6b9 471int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
87490f6d 472{
f142c6b9
JB		 473 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
474 struct net_device *dev = wdev->netdev;
87490f6d
JB		 475 struct ieee80211_local *local = sdata->local;
476 struct sta_info *sta;
477 u32 changed = 0;
478 int res;
479 u32 hw_reconf_flags = 0;
480
0d143fe1
JB		 481 switch (sdata->vif.type) {
482 case NL80211_IFTYPE_WDS:
483 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
484 return -ENOLINK;
485 break;
665c93a9
JB		 486 case NL80211_IFTYPE_AP_VLAN: {
487 struct ieee80211_sub_if_data *master;
488
0d143fe1
JB		 489 if (!sdata->bss)
490 return -ENOLINK;
665c93a9 491
0d143fe1 492 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
665c93a9
JB		 493
494 master = container_of(sdata->bss,
495 struct ieee80211_sub_if_data, u.ap);
496 sdata->control_port_protocol =
497 master->control_port_protocol;
498 sdata->control_port_no_encrypt =
499 master->control_port_no_encrypt;
1351c5d3
JB		 500 sdata->vif.cab_queue = master->vif.cab_queue;
501 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
502 sizeof(sdata->vif.hw_queue));
0d143fe1 503 break;
665c93a9 504 }
0d143fe1
JB		 505 case NL80211_IFTYPE_AP:
506 sdata->bss = &sdata->u.ap;
507 break;
508 case NL80211_IFTYPE_MESH_POINT:
0d143fe1
JB		 509 case NL80211_IFTYPE_STATION:
510 case NL80211_IFTYPE_MONITOR:
511 case NL80211_IFTYPE_ADHOC:
f142c6b9 512 case NL80211_IFTYPE_P2P_DEVICE:
0d143fe1
JB		 513 /* no special treatment */
514 break;
515 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 516 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 517 case NL80211_IFTYPE_P2P_CLIENT:
518 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB		 519 /* cannot happen */
520 WARN_ON(1);
521 break;
522 }
523
524 if (local->open_count == 0) {
24487981 525 res = drv_start(local);
0d143fe1
JB		 526 if (res)
527 goto err_del_bss;
e8975581
JB		 528 /* we're brought up, everything changes */
529 hw_reconf_flags = ~0;
1f87f7d3 530 ieee80211_led_radio(local, true);
67408c8c
JB		 531 ieee80211_mod_tpt_led_trig(local,
532 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
0d143fe1
JB		 533 }
534
535 /*
bf533e0b
JB		 536 * Copy the hopefully now-present MAC address to
537 * this interface, if it has the special null one.
0d143fe1 538 */
f142c6b9 539 if (dev && is_zero_ether_addr(dev->dev_addr)) {
bf533e0b
JB		 540 memcpy(dev->dev_addr,
541 local->hw.wiphy->perm_addr,
542 ETH_ALEN);
543 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
544
545 if (!is_valid_ether_addr(dev->dev_addr)) {
4d6c36fa
JB		 546 res = -EADDRNOTAVAIL;
547 goto err_stop;
0adc23f5 548 }
0d143fe1
JB		 549 }
550
0d143fe1
JB		 551 switch (sdata->vif.type) {
552 case NL80211_IFTYPE_AP_VLAN:
4d76d21b
JB		 553 /* no need to tell driver, but set carrier and chanctx */
554 if (rtnl_dereference(sdata->bss->beacon)) {
555 ieee80211_vif_vlan_copy_chanctx(sdata);
3edaf3e6 556 netif_carrier_on(dev);
4d76d21b 557 } else {
3edaf3e6 558 netif_carrier_off(dev);
4d76d21b 559 }
0d143fe1
JB		 560 break;
561 case NL80211_IFTYPE_MONITOR:
562 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
563 local->cooked_mntrs++;
564 break;
565 }
566
31eba5bc
FF		 567 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
568 res = drv_add_interface(local, sdata);
569 if (res)
570 goto err_stop;
571 } else if (local->monitors == 0 && local->open_count == 0) {
075e0847
JB		 572 res = ieee80211_add_virtual_monitor(local);
573 if (res)
574 goto err_stop;
575 }
576
0d143fe1
JB		 577 /* must be before the call to ieee80211_configure_filter */
578 local->monitors++;
e8975581 579 if (local->monitors == 1) {
0869aea0
JB		 580 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
581 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 582 }
0d143fe1 583
85416a4f 584 ieee80211_adjust_monitor_flags(sdata, 1);
0d143fe1 585 ieee80211_configure_filter(local);
801d929c
FF		 586 mutex_lock(&local->mtx);
587 ieee80211_recalc_idle(local);
588 mutex_unlock(&local->mtx);
53e9b1de
DG		 589
590 netif_carrier_on(dev);
0d143fe1 591 break;
0d143fe1 592 default:
34d4bc4d 593 if (coming_up) {
075e0847
JB		 594 ieee80211_del_virtual_monitor(local);
595
7b7eab6f 596 res = drv_add_interface(local, sdata);
34d4bc4d
JB		 597 if (res)
598 goto err_stop;
a9865538
JB		 599 res = ieee80211_check_queues(sdata,
600 ieee80211_vif_type_p2p(&sdata->vif));
3a25a8c8
JB		 601 if (res)
602 goto err_del_interface;
34d4bc4d 603 }
0d143fe1 604
29cbe68c 605 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 606 local->fif_pspoll++;
7be5086d 607 local->fif_probe_req++;
e3b90ca2 608
e3b90ca2 609 ieee80211_configure_filter(local);
7be5086d
JB		 610 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
611 local->fif_probe_req++;
a3c9aa51 612 }
e3b90ca2 613
f142c6b9
JB		 614 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
615 changed |= ieee80211_reset_erp_info(sdata);
0d143fe1 616 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 617
c405c629
JB		 618 switch (sdata->vif.type) {
619 case NL80211_IFTYPE_STATION:
620 case NL80211_IFTYPE_ADHOC:
621 case NL80211_IFTYPE_AP:
622 case NL80211_IFTYPE_MESH_POINT:
0d143fe1 623 netif_carrier_off(dev);
c405c629 624 break;
1411af15 625 case NL80211_IFTYPE_WDS:
f142c6b9 626 case NL80211_IFTYPE_P2P_DEVICE:
1411af15 627 break;
c405c629 628 default:
a2310824
JB		 629 /* not reached */
630 WARN_ON(1);
c405c629 631 }
59034591
EP		 632
633 /*
634 * set default queue parameters so drivers don't
635 * need to initialise the hardware if the hardware
636 * doesn't start up with sane defaults
637 */
3abead59 638 ieee80211_set_wmm_default(sdata, true);
0d143fe1
JB		 639 }
640
2d2080c3
JB		 641 set_bit(SDATA_STATE_RUNNING, &sdata->state);
642
0d143fe1
JB		 643 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
644 /* Create STA entry for the WDS peer */
645 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
646 GFP_KERNEL);
647 if (!sta) {
648 res = -ENOMEM;
649 goto err_del_interface;
650 }
651
83d5cc01
JB		 652 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
653 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
654 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
0d143fe1
JB		 655
656 res = sta_info_insert(sta);
657 if (res) {
658 /* STA has been freed */
659 goto err_del_interface;
660 }
1be7fe8d
BJ		 661
662 rate_control_rate_init(sta);
1411af15 663 netif_carrier_on(dev);
f142c6b9
JB		 664 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
665 rcu_assign_pointer(local->p2p_sdata, sdata);
0d143fe1
JB		 666 }
667
0d143fe1
JB		 668 /*
669 * set_multicast_list will be invoked by the networking core
670 * which will check whether any increments here were done in
671 * error and sync them down to the hardware as filter flags.
672 */
673 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
674 atomic_inc(&local->iff_allmultis);
675
676 if (sdata->flags & IEEE80211_SDATA_PROMISC)
677 atomic_inc(&local->iff_promiscs);
678
34d4bc4d
JB		 679 if (coming_up)
680 local->open_count++;
681
59034591 682 if (hw_reconf_flags)
e8975581 683 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1 684
10f644a4 685 ieee80211_recalc_ps(local, -1);
965bedad 686
2b436312
JB		 687 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
688 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
689 /* XXX: for AP_VLAN, actually track AP queues */
690 netif_tx_start_all_queues(dev);
691 } else if (dev) {
2b730daa
JB		 692 unsigned long flags;
693 int n_acs = IEEE80211_NUM_ACS;
694 int ac;
695
696 if (local->hw.queues < IEEE80211_NUM_ACS)
697 n_acs = 1;
698
699 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
700 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
701 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
702 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
703 for (ac = 0; ac < n_acs; ac++) {
704 int ac_queue = sdata->vif.hw_queue[ac];
705
706 if (local->queue_stop_reasons[ac_queue] == 0 &&
707 skb_queue_empty(&local->pending[ac_queue]))
708 netif_start_subqueue(dev, ac);
709 }
710 }
711 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
712 }
0d143fe1
JB		 713
714 return 0;
715 err_del_interface:
7b7eab6f 716 drv_remove_interface(local, sdata);
0d143fe1 717 err_stop:
24487981
JB		 718 if (!local->open_count)
719 drv_stop(local);
0d143fe1
JB		 720 err_del_bss:
721 sdata->bss = NULL;
722 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
723 list_del(&sdata->u.vlan.list);
4d6c36fa 724 /* might already be clear but that doesn't matter */
2d2080c3 725 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB		 726 return res;
727}
728
34d4bc4d 729static int ieee80211_open(struct net_device *dev)
0d143fe1
JB		 730{
731 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB		 732 int err;
733
734 /* fail early if user set an invalid address */
2fcf2824 735 if (!is_valid_ether_addr(dev->dev_addr))
34d4bc4d
JB		 736 return -EADDRNOTAVAIL;
737
738 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
739 if (err)
740 return err;
741
f142c6b9 742 return ieee80211_do_open(&sdata->wdev, true);
34d4bc4d
JB		 743}
744
745static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
746 bool going_down)
747{
0d143fe1 748 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 749 unsigned long flags;
750 struct sk_buff *skb, *tmp;
e8975581 751 u32 hw_reconf_flags = 0;
09f4114e 752 int i, flushed;
397a7a24 753 struct ps_data *ps;
d2859df5 754 struct cfg80211_chan_def chandef;
0d143fe1 755
c29acf20
RM		 756 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
757
e2fd5dbc 758 if (rcu_access_pointer(local->scan_sdata) == sdata)
352ffad6
BC		 759 ieee80211_scan_cancel(local);
760
0d143fe1
JB		 761 /*
762 * Stop TX on this interface first.
763 */
f142c6b9
JB		 764 if (sdata->dev)
765 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 766
c8f994ee 767 ieee80211_roc_purge(local, sdata);
af6b6374 768
572078be
JB		 769 if (sdata->vif.type == NL80211_IFTYPE_STATION)
770 ieee80211_mgd_stop(sdata);
771
cd7760e6
SW		 772 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
773 ieee80211_ibss_stop(sdata);
774
775
0d143fe1
JB		 776 /*
777 * Remove all stations associated with this interface.
778 *
779 * This must be done before calling ops->remove_interface()
780 * because otherwise we can later invoke ops->sta_notify()
781 * whenever the STAs are removed, and that invalidates driver
782 * assumptions about always getting a vif pointer that is valid
783 * (because if we remove a STA after ops->remove_interface()
784 * the driver will have removed the vif info already!)
785 *
09f4114e
JB		 786 * This is relevant only in WDS mode, in all other modes we've
787 * already removed all stations when disconnecting or similar,
788 * so warn otherwise.
051007d9
JB		 789 *
790 * We call sta_info_flush_cleanup() later, to combine RCU waits.
0d143fe1 791 */
051007d9 792 flushed = sta_info_flush_defer(sdata);
09f4114e
JB		 793 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
794 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
0d143fe1 795
afdc7c18 796 /* don't count this interface for promisc/allmulti while it is down */
0d143fe1
JB		 797 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
798 atomic_dec(&local->iff_allmultis);
799
800 if (sdata->flags & IEEE80211_SDATA_PROMISC)
801 atomic_dec(&local->iff_promiscs);
802
7be5086d 803 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e3b90ca2 804 local->fif_pspoll--;
7be5086d
JB		 805 local->fif_probe_req--;
806 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
807 local->fif_probe_req--;
808 }
e3b90ca2 809
f142c6b9
JB		 810 if (sdata->dev) {
811 netif_addr_lock_bh(sdata->dev);
812 spin_lock_bh(&local->filter_lock);
813 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
814 sdata->dev->addr_len);
815 spin_unlock_bh(&local->filter_lock);
816 netif_addr_unlock_bh(sdata->dev);
f142c6b9 817 }
3ac64bee 818
7cbf0ba5
VN		 819 del_timer_sync(&local->dynamic_ps_timer);
820 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1 821
04ecd257 822 cancel_work_sync(&sdata->recalc_smps);
73da7d5b
SW		 823 sdata->vif.csa_active = false;
824 cancel_work_sync(&sdata->csa_finalize_work);
04ecd257 825
164eb02d
SW		 826 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
827
828 if (sdata->wdev.cac_started) {
d2859df5 829 chandef = sdata->vif.bss_conf.chandef;
b2c0958b 830 WARN_ON(local->suspended);
164eb02d
SW		 831 mutex_lock(&local->iflist_mtx);
832 ieee80211_vif_release_channel(sdata);
833 mutex_unlock(&local->iflist_mtx);
d2859df5
JD		 834 cfg80211_cac_event(sdata->dev, &chandef,
835 NL80211_RADAR_CAC_ABORTED,
164eb02d
SW		 836 GFP_KERNEL);
837 }
838
0d143fe1
JB		 839 /* APs need special treatment */
840 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 841 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 842
843 /* down all dependent devices, that is VLANs */
57c9fff3 844 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 845 u.vlan.list)
846 dev_close(vlan->dev);
847 WARN_ON(!list_empty(&sdata->u.ap.vlans));
397a7a24
MB		 848 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
849 /* remove all packets in parent bc_buf pointing to this dev */
850 ps = &sdata->bss->ps;
851
852 spin_lock_irqsave(&ps->bc_buf.lock, flags);
853 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
854 if (skb->dev == sdata->dev) {
855 __skb_unlink(skb, &ps->bc_buf);
856 local->total_ps_buffered--;
857 ieee80211_free_txskb(&local->hw, skb);
858 }
859 }
860 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
0d143fe1
JB		 861 }
862
34d4bc4d
JB		 863 if (going_down)
864 local->open_count--;
0d143fe1
JB		 865
866 switch (sdata->vif.type) {
867 case NL80211_IFTYPE_AP_VLAN:
868 list_del(&sdata->u.vlan.list);
4d76d21b 869 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
0d143fe1
JB		 870 /* no need to tell driver */
871 break;
872 case NL80211_IFTYPE_MONITOR:
873 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
874 local->cooked_mntrs--;
875 break;
876 }
877
878 local->monitors--;
e8975581 879 if (local->monitors == 0) {
0869aea0
JB		 880 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
881 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 882 }
0d143fe1 883
85416a4f 884 ieee80211_adjust_monitor_flags(sdata, -1);
0d143fe1 885 break;
f142c6b9
JB		 886 case NL80211_IFTYPE_P2P_DEVICE:
887 /* relies on synchronize_rcu() below */
888 rcu_assign_pointer(local->p2p_sdata, NULL);
889 /* fall through */
0d143fe1 890 default:
0b7dff4f 891 cancel_work_sync(&sdata->work);
35f20c14
JB		 892 /*
893 * When we get here, the interface is marked down.
75de9113
JB		 894 *
895 * sta_info_flush_cleanup() requires rcu_barrier()
896 * first to wait for the station call_rcu() calls
8ceb5955
BC		 897 * to complete, and we also need synchronize_rcu()
898 * to wait for the RX path in case it is using the
75de9113
JB		 899 * interface and enqueuing frames at this very time on
900 * another CPU.
35f20c14 901 */
8ceb5955 902 synchronize_rcu();
75de9113 903 rcu_barrier();
051007d9
JB		 904 sta_info_flush_cleanup(sdata);
905
b9dcf712
JB		 906 /*
907 * Free all remaining keys, there shouldn't be any,
7b4396bd 908 * except maybe in WDS mode?
b9dcf712 909 */
ad0e2b5a 910 ieee80211_free_keys(sdata);
b9dcf712 911
1861b845
JB		 912 /* fall through */
913 case NL80211_IFTYPE_AP:
914 skb_queue_purge(&sdata->skb_queue);
0d143fe1
JB		 915 }
916
917 sdata->bss = NULL;
918
5061b0c2
JB		 919 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
920 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
921 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
922 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
923 if (info->control.vif == &sdata->vif) {
924 __skb_unlink(skb, &local->pending[i]);
d4fa14cd 925 ieee80211_free_txskb(&local->hw, skb);
5061b0c2
JB		 926 }
927 }
928 }
929 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
075e0847 930
b2c0958b
JB		 931 if (local->open_count == 0)
932 ieee80211_clear_tx_pending(local);
933
934 /*
935 * If the interface goes down while suspended, presumably because
936 * the device was unplugged and that happens before our resume,
937 * then the driver is already unconfigured and the remainder of
938 * this function isn't needed.
939 * XXX: what about WoWLAN? If the device has software state, e.g.
940 * memory allocated, it might expect teardown commands from
941 * mac80211 here?
942 */
943 if (local->suspended) {
944 WARN_ON(local->wowlan);
945 WARN_ON(rtnl_dereference(local->monitor_sdata));
946 return;
947 }
948
949 switch (sdata->vif.type) {
950 case NL80211_IFTYPE_AP_VLAN:
951 break;
952 case NL80211_IFTYPE_MONITOR:
953 if (local->monitors == 0)
954 ieee80211_del_virtual_monitor(local);
955
956 mutex_lock(&local->mtx);
957 ieee80211_recalc_idle(local);
958 mutex_unlock(&local->mtx);
31eba5bc
FF		 959
960 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
961 break;
962
963 /* fall through */
b2c0958b
JB		 964 default:
965 if (going_down)
966 drv_remove_interface(local, sdata);
967 }
968
969 ieee80211_recalc_ps(local, -1);
970
971 if (local->open_count == 0) {
972 ieee80211_stop_device(local);
973
974 /* no reconfiguring after stop! */
975 return;
976 }
977
978 /* do after stop to avoid reconfiguring when we stop anyway */
979 ieee80211_configure_filter(local);
980 ieee80211_hw_config(local, hw_reconf_flags);
981
982 if (local->monitors == local->open_count)
075e0847 983 ieee80211_add_virtual_monitor(local);
34d4bc4d
JB		 984}
985
986static int ieee80211_stop(struct net_device *dev)
987{
988 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
989
990 ieee80211_do_stop(sdata, true);
5061b0c2 991
0d143fe1
JB		 992 return 0;
993}
994
995static void ieee80211_set_multicast_list(struct net_device *dev)
996{
0d143fe1 997 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 998 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 999 int allmulti, promisc, sdata_allmulti, sdata_promisc;
1000
1001 allmulti = !!(dev->flags & IFF_ALLMULTI);
1002 promisc = !!(dev->flags & IFF_PROMISC);
1003 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1004 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1005
1006 if (allmulti != sdata_allmulti) {
1007 if (dev->flags & IFF_ALLMULTI)
1008 atomic_inc(&local->iff_allmultis);
1009 else
1010 atomic_dec(&local->iff_allmultis);
1011 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1012 }
1013
1014 if (promisc != sdata_promisc) {
1015 if (dev->flags & IFF_PROMISC)
1016 atomic_inc(&local->iff_promiscs);
1017 else
1018 atomic_dec(&local->iff_promiscs);
1019 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1020 }
3b8d81e0 1021 spin_lock_bh(&local->filter_lock);
22bedad3 1022 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 1023 spin_unlock_bh(&local->filter_lock);
3ac64bee 1024 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 1025}
1026
75636525
JB		 1027/*
1028 * Called when the netdev is removed or, by the code below, before
1029 * the interface type changes.
1030 */
f142c6b9 1031static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
f0706e82
JB		 1032{
1033 int i;
1034
75636525
JB		 1035 /* free extra data */
1036 ieee80211_free_keys(sdata);
1037
aee14ceb
JM		 1038 ieee80211_debugfs_remove_netdev(sdata);
1039
f0706e82 1040 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 1041 __skb_queue_purge(&sdata->fragments[i].skb_list);
1042 sdata->fragment_next = 0;
11a843b7 1043
b9dcf712
JB		 1044 if (ieee80211_vif_is_mesh(&sdata->vif))
1045 mesh_rmc_free(sdata);
f0706e82
JB		 1046}
1047
f142c6b9
JB		 1048static void ieee80211_uninit(struct net_device *dev)
1049{
1050 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1051}
1052
cf0277e7
JB		 1053static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1054 struct sk_buff *skb)
1055{
1056 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1057}
1058
587e729e
JB		 1059static const struct net_device_ops ieee80211_dataif_ops = {
1060 .ndo_open = ieee80211_open,
1061 .ndo_stop = ieee80211_stop,
f142c6b9 1062 .ndo_uninit = ieee80211_uninit,
587e729e 1063 .ndo_start_xmit = ieee80211_subif_start_xmit,
afc4b13d 1064 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1065 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 1066 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1067 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 1068};
1069
cf0277e7
JB		 1070static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1071 struct sk_buff *skb)
1072{
1073 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1074 struct ieee80211_local *local = sdata->local;
1075 struct ieee80211_hdr *hdr;
1076 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1077
32c5057b 1078 if (local->hw.queues < IEEE80211_NUM_ACS)
cf0277e7
JB		 1079 return 0;
1080
1081 if (skb->len < 4 ||
b49bb574 1082 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 1083 return 0; /* doesn't matter, frame will be dropped */
1084
b49bb574 1085 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 1086
00e96dec 1087 return ieee80211_select_queue_80211(sdata, skb, hdr);
cf0277e7
JB		 1088}
1089
587e729e
JB		 1090static const struct net_device_ops ieee80211_monitorif_ops = {
1091 .ndo_open = ieee80211_open,
1092 .ndo_stop = ieee80211_stop,
f142c6b9 1093 .ndo_uninit = ieee80211_uninit,
587e729e 1094 .ndo_start_xmit = ieee80211_monitor_start_xmit,
afc4b13d 1095 .ndo_set_rx_mode = ieee80211_set_multicast_list,
587e729e 1096 .ndo_change_mtu = ieee80211_change_mtu,
31eba5bc 1097 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 1098 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 1099};
1100
1101static void ieee80211_if_setup(struct net_device *dev)
1102{
1103 ether_setup(dev);
550fd08c 1104 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
587e729e 1105 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 1106 dev->destructor = free_netdev;
1107}
1108
1fa57d01
JB		 1109static void ieee80211_iface_work(struct work_struct *work)
1110{
1111 struct ieee80211_sub_if_data *sdata =
1112 container_of(work, struct ieee80211_sub_if_data, work);
1113 struct ieee80211_local *local = sdata->local;
1114 struct sk_buff *skb;
344eec67 1115 struct sta_info *sta;
c1475ca9 1116 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 1117
1118 if (!ieee80211_sdata_running(sdata))
1119 return;
1120
1121 if (local->scanning)
1122 return;
1123
1124 /*
1125 * ieee80211_queue_work() should have picked up most cases,
1126 * here we'll pick the rest.
1127 */
1128 if (WARN(local->suspended,
1129 "interface work scheduled while going to suspend\n"))
1130 return;
1131
1132 /* first process frames */
1133 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 1134 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1135
c1475ca9
JB		 1136 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1137 ra_tid = (void *)&skb->cb;
1138 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1139 ra_tid->tid);
1140 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1141 ra_tid = (void *)&skb->cb;
1142 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1143 ra_tid->tid);
1144 } else if (ieee80211_is_action(mgmt->frame_control) &&
1145 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 1146 int len = skb->len;
bed7ee6e 1147
a93e3644 1148 mutex_lock(&local->sta_mtx);
875ae5f6 1149 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 1150 if (sta) {
1151 switch (mgmt->u.action.u.addba_req.action_code) {
1152 case WLAN_ACTION_ADDBA_REQ:
1153 ieee80211_process_addba_request(
1154 local, sta, mgmt, len);
1155 break;
1156 case WLAN_ACTION_ADDBA_RESP:
1157 ieee80211_process_addba_resp(local, sta,
1158 mgmt, len);
1159 break;
1160 case WLAN_ACTION_DELBA:
1161 ieee80211_process_delba(sdata, sta,
1162 mgmt, len);
1163 break;
1164 default:
1165 WARN_ON(1);
1166 break;
1167 }
1168 }
a93e3644 1169 mutex_unlock(&local->sta_mtx);
344eec67
JB		 1170 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1171 struct ieee80211_hdr *hdr = (void *)mgmt;
1172 /*
1173 * So the frame isn't mgmt, but frame_control
1174 * is at the right place anyway, of course, so
1175 * the if statement is correct.
1176 *
1177 * Warn if we have other data frame types here,
1178 * they must not get here.
1179 */
1180 WARN_ON(hdr->frame_control &
1181 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1182 WARN_ON(!(hdr->seq_ctrl &
1183 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1184 /*
1185 * This was a fragment of a frame, received while
1186 * a block-ack session was active. That cannot be
1187 * right, so terminate the session.
1188 */
a93e3644 1189 mutex_lock(&local->sta_mtx);
875ae5f6 1190 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 1191 if (sta) {
1192 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1193 IEEE80211_QOS_CTL_TID_MASK;
1194
1195 __ieee80211_stop_rx_ba_session(
1196 sta, tid, WLAN_BACK_RECIPIENT,
53f73c09
JB		 1197 WLAN_REASON_QSTA_REQUIRE_SETUP,
1198 true);
344eec67 1199 }
a93e3644 1200 mutex_unlock(&local->sta_mtx);
bed7ee6e 1201 } else switch (sdata->vif.type) {
1fa57d01
JB		 1202 case NL80211_IFTYPE_STATION:
1203 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1204 break;
1205 case NL80211_IFTYPE_ADHOC:
1206 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1207 break;
1208 case NL80211_IFTYPE_MESH_POINT:
1209 if (!ieee80211_vif_is_mesh(&sdata->vif))
1210 break;
1211 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1212 break;
1213 default:
1214 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 1215 break;
1216 }
36b3a628
JB		 1217
1218 kfree_skb(skb);
1fa57d01
JB		 1219 }
1220
1221 /* then other type-dependent work */
1222 switch (sdata->vif.type) {
1223 case NL80211_IFTYPE_STATION:
1224 ieee80211_sta_work(sdata);
1225 break;
1226 case NL80211_IFTYPE_ADHOC:
1227 ieee80211_ibss_work(sdata);
1228 break;
1229 case NL80211_IFTYPE_MESH_POINT:
1230 if (!ieee80211_vif_is_mesh(&sdata->vif))
1231 break;
1232 ieee80211_mesh_work(sdata);
1233 break;
1234 default:
1235 break;
1236 }
1237}
1238
04ecd257
JB		 1239static void ieee80211_recalc_smps_work(struct work_struct *work)
1240{
1241 struct ieee80211_sub_if_data *sdata =
1242 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1243
1244 ieee80211_recalc_smps(sdata);
1245}
1fa57d01 1246
75636525
JB		 1247/*
1248 * Helper function to initialise an interface to a specific type.
1249 */
1250static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 1251 enum nl80211_iftype type)
f0706e82 1252{
75636525
JB		 1253 /* clear type-dependent union */
1254 memset(&sdata->u, 0, sizeof(sdata->u));
1255
1256 /* and set some type-dependent values */
1257 sdata->vif.type = type;
2ca27bcf 1258 sdata->vif.p2p = false;
60719ffd 1259 sdata->wdev.iftype = type;
75636525 1260
a621fa4d
JB		 1261 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1262 sdata->control_port_no_encrypt = false;
2475b1cc 1263 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
a621fa4d 1264
b53be792
SW		 1265 sdata->noack_map = 0;
1266
f142c6b9
JB		 1267 /* only monitor/p2p-device differ */
1268 if (sdata->dev) {
1269 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1270 sdata->dev->type = ARPHRD_ETHER;
1271 }
75636525 1272
35f20c14 1273 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 1274 INIT_WORK(&sdata->work, ieee80211_iface_work);
04ecd257 1275 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
73da7d5b 1276 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
35f20c14 1277
75636525 1278 switch (type) {
2ca27bcf
JB		 1279 case NL80211_IFTYPE_P2P_GO:
1280 type = NL80211_IFTYPE_AP;
1281 sdata->vif.type = type;
1282 sdata->vif.p2p = true;
1283 /* fall through */
05c914fe 1284 case NL80211_IFTYPE_AP:
d012a605 1285 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
75636525 1286 INIT_LIST_HEAD(&sdata->u.ap.vlans);
687da132
EG		 1287 INIT_WORK(&sdata->u.ap.request_smps_work,
1288 ieee80211_request_smps_ap_work);
ad2d223a 1289 sdata->vif.bss_conf.bssid = sdata->vif.addr;
687da132 1290 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
75636525 1291 break;
2ca27bcf
JB		 1292 case NL80211_IFTYPE_P2P_CLIENT:
1293 type = NL80211_IFTYPE_STATION;
1294 sdata->vif.type = type;
1295 sdata->vif.p2p = true;
1296 /* fall through */
05c914fe 1297 case NL80211_IFTYPE_STATION:
ad2d223a 1298 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
9c6bd790 1299 ieee80211_sta_setup_sdata(sdata);
472dbc45 1300 break;
46900298 1301 case NL80211_IFTYPE_ADHOC:
ad2d223a 1302 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
46900298
JB		 1303 ieee80211_ibss_setup_sdata(sdata);
1304 break;
05c914fe 1305 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 1306 if (ieee80211_vif_is_mesh(&sdata->vif))
1307 ieee80211_mesh_init_sdata(sdata);
1308 break;
05c914fe 1309 case NL80211_IFTYPE_MONITOR:
75636525 1310 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 1311 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 1312 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1313 MONITOR_FLAG_OTHER_BSS;
1314 break;
05c914fe 1315 case NL80211_IFTYPE_WDS:
ad2d223a
JB		 1316 sdata->vif.bss_conf.bssid = NULL;
1317 break;
05c914fe 1318 case NL80211_IFTYPE_AP_VLAN:
98104fde 1319 case NL80211_IFTYPE_P2P_DEVICE:
ad2d223a 1320 sdata->vif.bss_conf.bssid = sdata->vif.addr;
f142c6b9 1321 break;
05c914fe 1322 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1323 case NUM_NL80211_IFTYPES:
75636525
JB		 1324 BUG();
1325 break;
1326 }
1327
1328 ieee80211_debugfs_add_netdev(sdata);
1329}
1330
34d4bc4d
JB		 1331static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1332 enum nl80211_iftype type)
1333{
1334 struct ieee80211_local *local = sdata->local;
1335 int ret, err;
2ca27bcf
JB		 1336 enum nl80211_iftype internal_type = type;
1337 bool p2p = false;
34d4bc4d
JB		 1338
1339 ASSERT_RTNL();
1340
1341 if (!local->ops->change_interface)
1342 return -EBUSY;
1343
1344 switch (sdata->vif.type) {
1345 case NL80211_IFTYPE_AP:
1346 case NL80211_IFTYPE_STATION:
1347 case NL80211_IFTYPE_ADHOC:
1348 /*
1349 * Could maybe also all others here?
1350 * Just not sure how that interacts
1351 * with the RX/config path e.g. for
1352 * mesh.
1353 */
1354 break;
1355 default:
1356 return -EBUSY;
1357 }
1358
1359 switch (type) {
1360 case NL80211_IFTYPE_AP:
1361 case NL80211_IFTYPE_STATION:
1362 case NL80211_IFTYPE_ADHOC:
1363 /*
1364 * Could probably support everything
1365 * but WDS here (WDS do_open can fail
1366 * under memory pressure, which this
1367 * code isn't prepared to handle).
1368 */
1369 break;
2ca27bcf
JB		 1370 case NL80211_IFTYPE_P2P_CLIENT:
1371 p2p = true;
1372 internal_type = NL80211_IFTYPE_STATION;
1373 break;
1374 case NL80211_IFTYPE_P2P_GO:
1375 p2p = true;
1376 internal_type = NL80211_IFTYPE_AP;
1377 break;
34d4bc4d
JB		 1378 default:
1379 return -EBUSY;
1380 }
1381
2ca27bcf 1382 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB		 1383 if (ret)
1384 return ret;
1385
1386 ieee80211_do_stop(sdata, false);
1387
f142c6b9 1388 ieee80211_teardown_sdata(sdata);
34d4bc4d 1389
2ca27bcf 1390 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d 1391 if (ret)
a9865538 1392 type = ieee80211_vif_type_p2p(&sdata->vif);
34d4bc4d 1393
3a25a8c8
JB		 1394 /*
1395 * Ignore return value here, there's not much we can do since
1396 * the driver changed the interface type internally already.
1397 * The warnings will hopefully make driver authors fix it :-)
1398 */
a9865538 1399 ieee80211_check_queues(sdata, type);
3a25a8c8 1400
34d4bc4d
JB		 1401 ieee80211_setup_sdata(sdata, type);
1402
f142c6b9 1403 err = ieee80211_do_open(&sdata->wdev, false);
34d4bc4d
JB		 1404 WARN(err, "type change: do_open returned %d", err);
1405
1406 return ret;
1407}
1408
f3947e2d 1409int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 1410 enum nl80211_iftype type)
75636525 1411{
34d4bc4d
JB		 1412 int ret;
1413
f3947e2d
JB		 1414 ASSERT_RTNL();
1415
2ca27bcf 1416 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB		 1417 return 0;
1418
34d4bc4d
JB		 1419 if (ieee80211_sdata_running(sdata)) {
1420 ret = ieee80211_runtime_change_iftype(sdata, type);
1421 if (ret)
1422 return ret;
1423 } else {
1424 /* Purge and reset type-dependent state. */
f142c6b9 1425 ieee80211_teardown_sdata(sdata);
34d4bc4d
JB		 1426 ieee80211_setup_sdata(sdata, type);
1427 }
75636525
JB		 1428
1429 /* reset some values that shouldn't be kept across type changes */
75636525 1430 sdata->drop_unencrypted = 0;
9bc383de
JB		 1431 if (type == NL80211_IFTYPE_STATION)
1432 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 1433
1434 return 0;
f0706e82
JB		 1435}
1436
fa9029f8 1437static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
f142c6b9 1438 u8 *perm_addr, enum nl80211_iftype type)
fa9029f8
JB		 1439{
1440 struct ieee80211_sub_if_data *sdata;
1441 u64 mask, start, addr, val, inc;
1442 u8 *m;
1443 u8 tmp_addr[ETH_ALEN];
1444 int i;
1445
1446 /* default ... something at least */
f142c6b9 1447 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
fa9029f8
JB		 1448
1449 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1450 local->hw.wiphy->n_addresses <= 1)
1451 return;
1452
fa9029f8
JB		 1453 mutex_lock(&local->iflist_mtx);
1454
1455 switch (type) {
1456 case NL80211_IFTYPE_MONITOR:
1457 /* doesn't matter */
1458 break;
1459 case NL80211_IFTYPE_WDS:
1460 case NL80211_IFTYPE_AP_VLAN:
1461 /* match up with an AP interface */
1462 list_for_each_entry(sdata, &local->interfaces, list) {
1463 if (sdata->vif.type != NL80211_IFTYPE_AP)
1464 continue;
f142c6b9 1465 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
fa9029f8
JB		 1466 break;
1467 }
1468 /* keep default if no AP interface present */
1469 break;
6d71117a
JB		 1470 case NL80211_IFTYPE_P2P_CLIENT:
1471 case NL80211_IFTYPE_P2P_GO:
1472 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1473 list_for_each_entry(sdata, &local->interfaces, list) {
1474 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1475 continue;
1476 if (!ieee80211_sdata_running(sdata))
1477 continue;
1478 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1479 goto out_unlock;
1480 }
1481 }
1482 /* otherwise fall through */
fa9029f8
JB		 1483 default:
1484 /* assign a new address if possible -- try n_addresses first */
1485 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1486 bool used = false;
1487
1488 list_for_each_entry(sdata, &local->interfaces, list) {
1489 if (memcmp(local->hw.wiphy->addresses[i].addr,
1490 sdata->vif.addr, ETH_ALEN) == 0) {
1491 used = true;
1492 break;
1493 }
1494 }
1495
1496 if (!used) {
f142c6b9 1497 memcpy(perm_addr,
fa9029f8
JB		 1498 local->hw.wiphy->addresses[i].addr,
1499 ETH_ALEN);
1500 break;
1501 }
1502 }
1503
1504 /* try mask if available */
1505 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1506 break;
1507
1508 m = local->hw.wiphy->addr_mask;
1509 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1510 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1511 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1512
1513 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1514 /* not a contiguous mask ... not handled now! */
bdcbd8e0 1515 pr_info("not contiguous\n");
fa9029f8
JB		 1516 break;
1517 }
1518
ac20976d
HS		 1519 /*
1520 * Pick address of existing interface in case user changed
1521 * MAC address manually, default to perm_addr.
1522 */
fa9029f8 1523 m = local->hw.wiphy->perm_addr;
ac20976d
HS		 1524 list_for_each_entry(sdata, &local->interfaces, list) {
1525 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1526 continue;
1527 m = sdata->vif.addr;
1528 break;
1529 }
fa9029f8
JB		 1530 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1531 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1532 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1533
1534 inc = 1ULL<<__ffs64(mask);
1535 val = (start & mask);
1536 addr = (start & ~mask) | (val & mask);
1537 do {
1538 bool used = false;
1539
1540 tmp_addr[5] = addr >> 0*8;
1541 tmp_addr[4] = addr >> 1*8;
1542 tmp_addr[3] = addr >> 2*8;
1543 tmp_addr[2] = addr >> 3*8;
1544 tmp_addr[1] = addr >> 4*8;
1545 tmp_addr[0] = addr >> 5*8;
1546
1547 val += inc;
1548
1549 list_for_each_entry(sdata, &local->interfaces, list) {
1550 if (memcmp(tmp_addr, sdata->vif.addr,
1551 ETH_ALEN) == 0) {
1552 used = true;
1553 break;
1554 }
1555 }
1556
1557 if (!used) {
f142c6b9 1558 memcpy(perm_addr, tmp_addr, ETH_ALEN);
fa9029f8
JB		 1559 break;
1560 }
1561 addr = (start & ~mask) | (val & mask);
1562 } while (addr != start);
1563
1564 break;
1565 }
1566
6d71117a 1567 out_unlock:
fa9029f8
JB		 1568 mutex_unlock(&local->iflist_mtx);
1569}
1570
97f97b1f
JB		 1571static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1572{
1573 struct ieee80211_sub_if_data *sdata;
1574
1575 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1576
1577 ieee80211_cleanup_sdata_stas(sdata);
1578}
1579
3e122be0 1580int ieee80211_if_add(struct ieee80211_local *local, const char *name,
84efbb84 1581 struct wireless_dev **new_wdev, enum nl80211_iftype type,
ee385855 1582 struct vif_params *params)
f0706e82 1583{
f142c6b9 1584 struct net_device *ndev = NULL;
f0706e82 1585 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1586 int ret, i;
ded81f6b 1587 int txqs = 1;
f0706e82
JB		 1588
1589 ASSERT_RTNL();
75636525 1590
f142c6b9
JB		 1591 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1592 struct wireless_dev *wdev;
1593
1594 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1595 GFP_KERNEL);
1596 if (!sdata)
1597 return -ENOMEM;
1598 wdev = &sdata->wdev;
1599
1600 sdata->dev = NULL;
1601 strlcpy(sdata->name, name, IFNAMSIZ);
1602 ieee80211_assign_perm_addr(local, wdev->address, type);
1603 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1604 } else {
1605 if (local->hw.queues >= IEEE80211_NUM_ACS)
1606 txqs = IEEE80211_NUM_ACS;
1607
1608 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1609 local->hw.vif_data_size,
1610 name, ieee80211_if_setup, txqs, 1);
1611 if (!ndev)
1612 return -ENOMEM;
1613 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1614
1615 ndev->needed_headroom = local->tx_headroom +
1616 4*6 /* four MAC addresses */
1617 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1618 + 6 /* mesh */
1619 + 8 /* rfc1042/bridge tunnel */
1620 - ETH_HLEN /* ethernet hard_header_len */
1621 + IEEE80211_ENCRYPT_HEADROOM;
1622 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1623
1624 ret = dev_alloc_name(ndev, ndev->name);
1625 if (ret < 0) {
1626 free_netdev(ndev);
1627 return ret;
1628 }
1629
1630 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1631 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1632 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1633
1634 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1635 sdata = netdev_priv(ndev);
1636 ndev->ieee80211_ptr = &sdata->wdev;
1637 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1638 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1639
1640 sdata->dev = ndev;
1641 }
75636525
JB		 1642
1643 /* initialise type-independent data */
f0706e82 1644 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1645 sdata->local = local;
75636525
JB		 1646
1647 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1648 skb_queue_head_init(&sdata->fragments[i].skb_list);
1649
1650 INIT_LIST_HEAD(&sdata->key_list);
1651
97f97b1f
JB		 1652 spin_lock_init(&sdata->cleanup_stations_lock);
1653 INIT_LIST_HEAD(&sdata->cleanup_stations);
1654 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
164eb02d
SW		 1655 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1656 ieee80211_dfs_cac_timer_work);
8d1f7ecd
JB		 1657 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1658 ieee80211_delayed_tailroom_dec);
97f97b1f 1659
37eb0b16
JM		 1660 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1661 struct ieee80211_supported_band *sband;
1662 sband = local->hw.wiphy->bands[i];
1663 sdata->rc_rateidx_mask[i] =
1664 sband ? (1 << sband->n_bitrates) - 1 : 0;
19468413
SW		 1665 if (sband)
1666 memcpy(sdata->rc_rateidx_mcs_mask[i],
1667 sband->ht_cap.mcs.rx_mask,
1668 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1669 else
1670 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1671 sizeof(sdata->rc_rateidx_mcs_mask[i]));
37eb0b16 1672 }
75636525 1673
3a25a8c8
JB		 1674 ieee80211_set_default_queues(sdata);
1675
1ea6f9c0
JB		 1676 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1677 sdata->user_power_level = local->user_power_level;
1678
2475b1cc
MS		 1679 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1680
75636525
JB		 1681 /* setup type-dependent data */
1682 ieee80211_setup_sdata(sdata, type);
f0706e82 1683
f142c6b9
JB		 1684 if (ndev) {
1685 if (params) {
1686 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1687 if (type == NL80211_IFTYPE_STATION)
1688 sdata->u.mgd.use_4addr = params->use_4addr;
1689 }
9bc383de 1690
f142c6b9 1691 ndev->features |= local->hw.netdev_features;
72d78728 1692
f142c6b9
JB		 1693 ret = register_netdevice(ndev);
1694 if (ret) {
1695 free_netdev(ndev);
1696 return ret;
1697 }
1698 }
f0706e82 1699
c771c9d8 1700 mutex_lock(&local->iflist_mtx);
79010420 1701 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1702 mutex_unlock(&local->iflist_mtx);
79010420 1703
84efbb84
JB		 1704 if (new_wdev)
1705 *new_wdev = &sdata->wdev;
f0706e82 1706
f0706e82 1707 return 0;
f0706e82
JB		 1708}
1709
f698d856 1710void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1711{
f0706e82 1712 ASSERT_RTNL();
11a843b7 1713
c771c9d8 1714 mutex_lock(&sdata->local->iflist_mtx);
75636525 1715 list_del_rcu(&sdata->list);
c771c9d8
JB		 1716 mutex_unlock(&sdata->local->iflist_mtx);
1717
75636525 1718 synchronize_rcu();
f142c6b9
JB		 1719
1720 if (sdata->dev) {
1721 unregister_netdevice(sdata->dev);
1722 } else {
1723 cfg80211_unregister_wdev(&sdata->wdev);
1724 kfree(sdata);
1725 }
1726}
1727
1728void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1729{
1730 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1731 return;
1732 ieee80211_do_stop(sdata, true);
1733 ieee80211_teardown_sdata(sdata);
f0706e82
JB		 1734}
1735
75636525
JB		 1736/*
1737 * Remove all interfaces, may only be called at hardware unregistration
1738 * time because it doesn't do RCU-safe list removals.
1739 */
1740void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1741{
75636525 1742 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1743 LIST_HEAD(unreg_list);
f142c6b9 1744 LIST_HEAD(wdev_list);
f0706e82
JB		 1745
1746 ASSERT_RTNL();
1747
c8aa22db
JB		 1748 /*
1749 * Close all AP_VLAN interfaces first, as otherwise they
1750 * might be closed while the AP interface they belong to
1751 * is closed, causing unregister_netdevice_many() to crash.
1752 */
1753 list_for_each_entry(sdata, &local->interfaces, list)
1754 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1755 dev_close(sdata->dev);
1756
efe117ab 1757 mutex_lock(&local->iflist_mtx);
75636525
JB		 1758 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1759 list_del(&sdata->list);
c771c9d8 1760
f142c6b9
JB		 1761 if (sdata->dev)
1762 unregister_netdevice_queue(sdata->dev, &unreg_list);
1763 else
1764 list_add(&sdata->list, &wdev_list);
f0706e82 1765 }
efe117ab
ED		 1766 mutex_unlock(&local->iflist_mtx);
1767 unregister_netdevice_many(&unreg_list);
5f04d506 1768 list_del(&unreg_list);
f142c6b9
JB		 1769
1770 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1771 list_del(&sdata->list);
1772 cfg80211_unregister_wdev(&sdata->wdev);
1773 kfree(sdata);
1774 }
f0706e82 1775}
5cff20e6 1776
47846c9b 1777static int netdev_notify(struct notifier_block *nb,
351638e7 1778 unsigned long state, void *ptr)
47846c9b 1779{
351638e7 1780 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
47846c9b
JB		 1781 struct ieee80211_sub_if_data *sdata;
1782
1783 if (state != NETDEV_CHANGENAME)
1784 return 0;
1785
1786 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1787 return 0;
1788
1789 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1790 return 0;
1791
1792 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1793
2f5265e6 1794 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1795
1796 ieee80211_debugfs_rename_netdev(sdata);
1797 return 0;
1798}
1799
1800static struct notifier_block mac80211_netdev_notifier = {
1801 .notifier_call = netdev_notify,
1802};
1803
1804int ieee80211_iface_init(void)
1805{
1806 return register_netdevice_notifier(&mac80211_netdev_notifier);
1807}
1808
1809void ieee80211_iface_exit(void)
1810{
1811 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1812}
Linux 6.x block layer and io_uring tree(s)