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cfg80211: allow changing port control protocol
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f0706e82 1/*
0d143fe1
JB
2 * Interface handling (except master interface)
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"
0d143fe1 27
c771c9d8
JB
28/**
29 * DOC: Interface list locking
30 *
31 * The interface list in each struct ieee80211_local is protected
32 * three-fold:
33 *
34 * (1) modifications may only be done under the RTNL
35 * (2) modifications and readers are protected against each other by
36 * the iflist_mtx.
37 * (3) modifications are done in an RCU manner so atomic readers
38 * can traverse the list in RCU-safe blocks.
39 *
40 * As a consequence, reads (traversals) of the list can be protected
41 * by either the RTNL, the iflist_mtx or RCU.
42 */
43
44
0d143fe1
JB
45static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
46{
47 int meshhdrlen;
48 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
49
50 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
51
52 /* FIX: what would be proper limits for MTU?
53 * This interface uses 802.3 frames. */
54 if (new_mtu < 256 ||
55 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
56 return -EINVAL;
57 }
58
59#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
60 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
61#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
62 dev->mtu = new_mtu;
63 return 0;
64}
65
47846c9b
JB
66static int ieee80211_change_mac(struct net_device *dev, void *addr)
67{
68 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 69 struct sockaddr *sa = addr;
47846c9b
JB
70 int ret;
71
9607e6b6 72 if (ieee80211_sdata_running(sdata))
47846c9b
JB
73 return -EBUSY;
74
fc5f7577 75 ret = eth_mac_addr(dev, sa);
47846c9b
JB
76
77 if (ret == 0)
fc5f7577 78 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB
79
80 return ret;
81}
82
0d143fe1
JB
83static inline int identical_mac_addr_allowed(int type1, int type2)
84{
85 return type1 == NL80211_IFTYPE_MONITOR ||
86 type2 == NL80211_IFTYPE_MONITOR ||
87 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
88 (type1 == NL80211_IFTYPE_WDS &&
89 (type2 == NL80211_IFTYPE_WDS ||
90 type2 == NL80211_IFTYPE_AP)) ||
91 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
92 (type1 == NL80211_IFTYPE_AP_VLAN &&
93 (type2 == NL80211_IFTYPE_AP ||
94 type2 == NL80211_IFTYPE_AP_VLAN));
95}
96
97static int ieee80211_open(struct net_device *dev)
98{
b4a4bf5d
JB
99 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
100 struct ieee80211_sub_if_data *nsdata;
101 struct ieee80211_local *local = sdata->local;
0d143fe1 102 struct sta_info *sta;
0d143fe1
JB
103 u32 changed = 0;
104 int res;
e8975581 105 u32 hw_reconf_flags = 0;
0d143fe1
JB
106 u8 null_addr[ETH_ALEN] = {0};
107
0d143fe1
JB
108 /* fail early if user set an invalid address */
109 if (compare_ether_addr(dev->dev_addr, null_addr) &&
110 !is_valid_ether_addr(dev->dev_addr))
111 return -EADDRNOTAVAIL;
112
113 /* we hold the RTNL here so can safely walk the list */
114 list_for_each_entry(nsdata, &local->interfaces, list) {
115 struct net_device *ndev = nsdata->dev;
116
9607e6b6 117 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB
118 /*
119 * Allow only a single IBSS interface to be up at any
120 * time. This is restricted because beacon distribution
121 * cannot work properly if both are in the same IBSS.
122 *
123 * To remove this restriction we'd have to disallow them
124 * from setting the same SSID on different IBSS interfaces
125 * belonging to the same hardware. Then, however, we're
126 * faced with having to adopt two different TSF timers...
127 */
128 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
129 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
130 return -EBUSY;
131
132 /*
133 * The remaining checks are only performed for interfaces
134 * with the same MAC address.
135 */
136 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
137 continue;
138
139 /*
140 * check whether it may have the same address
141 */
142 if (!identical_mac_addr_allowed(sdata->vif.type,
143 nsdata->vif.type))
144 return -ENOTUNIQ;
145
146 /*
147 * can only add VLANs to enabled APs
148 */
149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
150 nsdata->vif.type == NL80211_IFTYPE_AP)
151 sdata->bss = &nsdata->u.ap;
152 }
153 }
154
155 switch (sdata->vif.type) {
156 case NL80211_IFTYPE_WDS:
157 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
158 return -ENOLINK;
159 break;
160 case NL80211_IFTYPE_AP_VLAN:
161 if (!sdata->bss)
162 return -ENOLINK;
163 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
164 break;
165 case NL80211_IFTYPE_AP:
166 sdata->bss = &sdata->u.ap;
167 break;
168 case NL80211_IFTYPE_MESH_POINT:
169 if (!ieee80211_vif_is_mesh(&sdata->vif))
170 break;
171 /* mesh ifaces must set allmulti to forward mcast traffic */
172 atomic_inc(&local->iff_allmultis);
173 break;
174 case NL80211_IFTYPE_STATION:
175 case NL80211_IFTYPE_MONITOR:
176 case NL80211_IFTYPE_ADHOC:
177 /* no special treatment */
178 break;
179 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 180 case NUM_NL80211_IFTYPES:
0d143fe1
JB
181 /* cannot happen */
182 WARN_ON(1);
183 break;
184 }
185
186 if (local->open_count == 0) {
24487981 187 res = drv_start(local);
0d143fe1
JB
188 if (res)
189 goto err_del_bss;
4e6cbfd0
JL
190 if (local->ops->napi_poll)
191 napi_enable(&local->napi);
e8975581
JB
192 /* we're brought up, everything changes */
193 hw_reconf_flags = ~0;
1f87f7d3 194 ieee80211_led_radio(local, true);
0d143fe1
JB
195 }
196
197 /*
198 * Check all interfaces and copy the hopefully now-present
199 * MAC address to those that have the special null one.
200 */
201 list_for_each_entry(nsdata, &local->interfaces, list) {
202 struct net_device *ndev = nsdata->dev;
203
204 /*
9607e6b6 205 * No need to check running since we do not allow
0d143fe1
JB
206 * it to start up with this invalid address.
207 */
0adc23f5 208 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) {
0d143fe1
JB
209 memcpy(ndev->dev_addr,
210 local->hw.wiphy->perm_addr,
211 ETH_ALEN);
0adc23f5
JL
212 memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN);
213 }
0d143fe1
JB
214 }
215
0d143fe1
JB
216 /*
217 * Validate the MAC address for this device.
218 */
219 if (!is_valid_ether_addr(dev->dev_addr)) {
24487981
JB
220 if (!local->open_count)
221 drv_stop(local);
0d143fe1
JB
222 return -EADDRNOTAVAIL;
223 }
224
225 switch (sdata->vif.type) {
226 case NL80211_IFTYPE_AP_VLAN:
227 /* no need to tell driver */
228 break;
229 case NL80211_IFTYPE_MONITOR:
230 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
231 local->cooked_mntrs++;
232 break;
233 }
234
235 /* must be before the call to ieee80211_configure_filter */
236 local->monitors++;
e8975581 237 if (local->monitors == 1) {
0869aea0
JB
238 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
239 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 240 }
0d143fe1
JB
241
242 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
243 local->fif_fcsfail++;
244 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
245 local->fif_plcpfail++;
e3b90ca2 246 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
0d143fe1 247 local->fif_control++;
e3b90ca2
IP
248 local->fif_pspoll++;
249 }
0d143fe1
JB
250 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
251 local->fif_other_bss++;
252
0d143fe1 253 ieee80211_configure_filter(local);
53e9b1de
DG
254
255 netif_carrier_on(dev);
0d143fe1 256 break;
0d143fe1 257 default:
1ed32e4f 258 res = drv_add_interface(local, &sdata->vif);
0d143fe1
JB
259 if (res)
260 goto err_stop;
261
a3c9aa51
AY
262 if (ieee80211_vif_is_mesh(&sdata->vif)) {
263 local->fif_other_bss++;
a3c9aa51 264 ieee80211_configure_filter(local);
a3c9aa51 265
0d143fe1 266 ieee80211_start_mesh(sdata);
e3b90ca2
IP
267 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
268 local->fif_pspoll++;
269
e3b90ca2 270 ieee80211_configure_filter(local);
a3c9aa51 271 }
e3b90ca2 272
0d143fe1
JB
273 changed |= ieee80211_reset_erp_info(sdata);
274 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 275
7986cf95 276 if (sdata->vif.type == NL80211_IFTYPE_STATION)
0d143fe1
JB
277 netif_carrier_off(dev);
278 else
279 netif_carrier_on(dev);
280 }
281
282 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
283 /* Create STA entry for the WDS peer */
284 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
285 GFP_KERNEL);
286 if (!sta) {
287 res = -ENOMEM;
288 goto err_del_interface;
289 }
290
291 /* no locking required since STA is not live yet */
292 sta->flags |= WLAN_STA_AUTHORIZED;
293
294 res = sta_info_insert(sta);
295 if (res) {
296 /* STA has been freed */
297 goto err_del_interface;
298 }
299 }
300
0d143fe1
JB
301 /*
302 * set_multicast_list will be invoked by the networking core
303 * which will check whether any increments here were done in
304 * error and sync them down to the hardware as filter flags.
305 */
306 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
307 atomic_inc(&local->iff_allmultis);
308
309 if (sdata->flags & IEEE80211_SDATA_PROMISC)
310 atomic_inc(&local->iff_promiscs);
311
7da7cc1d 312 mutex_lock(&local->mtx);
5cff20e6 313 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 314 mutex_unlock(&local->mtx);
5cff20e6 315
0d143fe1 316 local->open_count++;
e8975581
JB
317 if (hw_reconf_flags) {
318 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1
JB
319 /*
320 * set default queue parameters so drivers don't
321 * need to initialise the hardware if the hardware
322 * doesn't start up with sane defaults
323 */
324 ieee80211_set_wmm_default(sdata);
325 }
326
10f644a4 327 ieee80211_recalc_ps(local, -1);
965bedad 328
8a5b33f5 329 netif_tx_start_all_queues(dev);
0d143fe1
JB
330
331 return 0;
332 err_del_interface:
1ed32e4f 333 drv_remove_interface(local, &sdata->vif);
0d143fe1 334 err_stop:
24487981
JB
335 if (!local->open_count)
336 drv_stop(local);
0d143fe1
JB
337 err_del_bss:
338 sdata->bss = NULL;
339 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
340 list_del(&sdata->u.vlan.list);
341 return res;
342}
343
344static int ieee80211_stop(struct net_device *dev)
345{
346 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
347 struct ieee80211_local *local = sdata->local;
5061b0c2
JB
348 unsigned long flags;
349 struct sk_buff *skb, *tmp;
e8975581 350 u32 hw_reconf_flags = 0;
5061b0c2 351 int i;
0d143fe1
JB
352
353 /*
354 * Stop TX on this interface first.
355 */
8a5b33f5 356 netif_tx_stop_all_queues(dev);
0d143fe1 357
af6b6374
JB
358 /*
359 * Purge work for this interface.
360 */
361 ieee80211_work_purge(sdata);
362
0d143fe1
JB
363 /*
364 * Remove all stations associated with this interface.
365 *
366 * This must be done before calling ops->remove_interface()
367 * because otherwise we can later invoke ops->sta_notify()
368 * whenever the STAs are removed, and that invalidates driver
369 * assumptions about always getting a vif pointer that is valid
370 * (because if we remove a STA after ops->remove_interface()
371 * the driver will have removed the vif info already!)
372 *
373 * We could relax this and only unlink the stations from the
374 * hash table and list but keep them on a per-sdata list that
375 * will be inserted back again when the interface is brought
376 * up again, but I don't currently see a use case for that,
377 * except with WDS which gets a STA entry created when it is
378 * brought up.
379 */
380 sta_info_flush(local, sdata);
381
382 /*
383 * Don't count this interface for promisc/allmulti while it
384 * is down. dev_mc_unsync() will invoke set_multicast_list
385 * on the master interface which will sync these down to the
386 * hardware as filter flags.
387 */
388 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
389 atomic_dec(&local->iff_allmultis);
390
391 if (sdata->flags & IEEE80211_SDATA_PROMISC)
392 atomic_dec(&local->iff_promiscs);
393
e3b90ca2
IP
394 if (sdata->vif.type == NL80211_IFTYPE_AP)
395 local->fif_pspoll--;
396
3b8d81e0
JB
397 netif_addr_lock_bh(dev);
398 spin_lock_bh(&local->filter_lock);
22bedad3 399 __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0
JB
400 spin_unlock_bh(&local->filter_lock);
401 netif_addr_unlock_bh(dev);
402
3ac64bee
JB
403 ieee80211_configure_filter(local);
404
7cbf0ba5
VN
405 del_timer_sync(&local->dynamic_ps_timer);
406 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1
JB
407
408 /* APs need special treatment */
409 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 410 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB
411 struct beacon_data *old_beacon = sdata->u.ap.beacon;
412
413 /* remove beacon */
414 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
415 synchronize_rcu();
416 kfree(old_beacon);
417
418 /* down all dependent devices, that is VLANs */
57c9fff3 419 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB
420 u.vlan.list)
421 dev_close(vlan->dev);
422 WARN_ON(!list_empty(&sdata->u.ap.vlans));
423 }
424
425 local->open_count--;
426
427 switch (sdata->vif.type) {
428 case NL80211_IFTYPE_AP_VLAN:
429 list_del(&sdata->u.vlan.list);
430 /* no need to tell driver */
431 break;
432 case NL80211_IFTYPE_MONITOR:
433 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
434 local->cooked_mntrs--;
435 break;
436 }
437
438 local->monitors--;
e8975581 439 if (local->monitors == 0) {
0869aea0
JB
440 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
441 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 442 }
0d143fe1
JB
443
444 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
445 local->fif_fcsfail--;
446 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
447 local->fif_plcpfail--;
e3b90ca2
IP
448 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
449 local->fif_pspoll--;
0d143fe1 450 local->fif_control--;
e3b90ca2 451 }
0d143fe1
JB
452 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
453 local->fif_other_bss--;
454
0d143fe1 455 ieee80211_configure_filter(local);
0d143fe1
JB
456 break;
457 case NL80211_IFTYPE_STATION:
46900298
JB
458 del_timer_sync(&sdata->u.mgd.chswitch_timer);
459 del_timer_sync(&sdata->u.mgd.timer);
0e2b6286
JB
460 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
461 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
0d143fe1 462 /*
0e2b6286
JB
463 * If any of the timers fired while we waited for it, it will
464 * have queued its work. Now the work will be running again
0d143fe1
JB
465 * but will not rearm the timer again because it checks
466 * whether the interface is running, which, at this point,
467 * it no longer is.
468 */
46900298 469 cancel_work_sync(&sdata->u.mgd.chswitch_work);
0e2b6286 470 cancel_work_sync(&sdata->u.mgd.monitor_work);
1e4dcd01 471 cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work);
04de8381 472
46900298
JB
473 /* fall through */
474 case NL80211_IFTYPE_ADHOC:
64592c8f 475 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
46900298 476 del_timer_sync(&sdata->u.ibss.timer);
0d143fe1
JB
477 /* fall through */
478 case NL80211_IFTYPE_MESH_POINT:
479 if (ieee80211_vif_is_mesh(&sdata->vif)) {
a3c9aa51
AY
480 /* other_bss and allmulti are always set on mesh
481 * ifaces */
482 local->fif_other_bss--;
0d143fe1 483 atomic_dec(&local->iff_allmultis);
a3c9aa51 484
a3c9aa51 485 ieee80211_configure_filter(local);
a3c9aa51 486
0d143fe1
JB
487 ieee80211_stop_mesh(sdata);
488 }
489 /* fall through */
490 default:
c1475ca9 491 flush_work(&sdata->work);
35f20c14
JB
492 /*
493 * When we get here, the interface is marked down.
494 * Call synchronize_rcu() to wait for the RX path
495 * should it be using the interface and enqueuing
496 * frames at this very time on another CPU.
497 */
498 synchronize_rcu();
499 skb_queue_purge(&sdata->skb_queue);
500
15db0b7f
JB
501 if (local->scan_sdata == sdata)
502 ieee80211_scan_cancel(local);
0d143fe1 503
97af7432
BC
504 /*
505 * Disable beaconing for AP and mesh, IBSS can't
506 * still be joined to a network at this point.
507 */
508 if (sdata->vif.type == NL80211_IFTYPE_AP ||
509 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
510 ieee80211_bss_info_change_notify(sdata,
511 BSS_CHANGED_BEACON_ENABLED);
512 }
513
ad0e2b5a
JB
514 /* free all remaining keys, there shouldn't be any */
515 ieee80211_free_keys(sdata);
1ed32e4f 516 drv_remove_interface(local, &sdata->vif);
0d143fe1
JB
517 }
518
519 sdata->bss = NULL;
520
7da7cc1d 521 mutex_lock(&local->mtx);
5cff20e6 522 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 523 mutex_unlock(&local->mtx);
5cff20e6
JB
524
525 ieee80211_recalc_ps(local, -1);
526
0d143fe1 527 if (local->open_count == 0) {
4e6cbfd0
JL
528 if (local->ops->napi_poll)
529 napi_disable(&local->napi);
ea77f12f 530 ieee80211_clear_tx_pending(local);
84f6a01c 531 ieee80211_stop_device(local);
0d143fe1 532
e8975581
JB
533 /* no reconfiguring after stop! */
534 hw_reconf_flags = 0;
0d143fe1
JB
535 }
536
e8975581
JB
537 /* do after stop to avoid reconfiguring when we stop anyway */
538 if (hw_reconf_flags)
539 ieee80211_hw_config(local, hw_reconf_flags);
540
5061b0c2
JB
541 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
542 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
543 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
544 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
545 if (info->control.vif == &sdata->vif) {
546 __skb_unlink(skb, &local->pending[i]);
547 dev_kfree_skb_irq(skb);
548 }
549 }
550 }
551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
552
0d143fe1
JB
553 return 0;
554}
555
556static void ieee80211_set_multicast_list(struct net_device *dev)
557{
0d143fe1 558 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 559 struct ieee80211_local *local = sdata->local;
0d143fe1
JB
560 int allmulti, promisc, sdata_allmulti, sdata_promisc;
561
562 allmulti = !!(dev->flags & IFF_ALLMULTI);
563 promisc = !!(dev->flags & IFF_PROMISC);
564 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
565 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
566
567 if (allmulti != sdata_allmulti) {
568 if (dev->flags & IFF_ALLMULTI)
569 atomic_inc(&local->iff_allmultis);
570 else
571 atomic_dec(&local->iff_allmultis);
572 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
573 }
574
575 if (promisc != sdata_promisc) {
576 if (dev->flags & IFF_PROMISC)
577 atomic_inc(&local->iff_promiscs);
578 else
579 atomic_dec(&local->iff_promiscs);
580 sdata->flags ^= IEEE80211_SDATA_PROMISC;
581 }
3b8d81e0 582 spin_lock_bh(&local->filter_lock);
22bedad3 583 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 584 spin_unlock_bh(&local->filter_lock);
3ac64bee 585 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB
586}
587
75636525
JB
588/*
589 * Called when the netdev is removed or, by the code below, before
590 * the interface type changes.
591 */
592static void ieee80211_teardown_sdata(struct net_device *dev)
f0706e82 593{
75636525
JB
594 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
595 struct ieee80211_local *local = sdata->local;
596 struct beacon_data *beacon;
597 struct sk_buff *skb;
598 int flushed;
f0706e82
JB
599 int i;
600
75636525
JB
601 /* free extra data */
602 ieee80211_free_keys(sdata);
603
aee14ceb
JM
604 ieee80211_debugfs_remove_netdev(sdata);
605
f0706e82 606 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB
607 __skb_queue_purge(&sdata->fragments[i].skb_list);
608 sdata->fragment_next = 0;
11a843b7 609
75636525 610 switch (sdata->vif.type) {
05c914fe 611 case NL80211_IFTYPE_AP:
75636525
JB
612 beacon = sdata->u.ap.beacon;
613 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
614 synchronize_rcu();
615 kfree(beacon);
3e122be0 616
75636525
JB
617 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
618 local->total_ps_buffered--;
619 dev_kfree_skb(skb);
620 }
621
622 break;
05c914fe 623 case NL80211_IFTYPE_MESH_POINT:
75636525 624 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 625 mesh_rmc_free(sdata);
472dbc45 626 break;
05c914fe 627 case NL80211_IFTYPE_ADHOC:
af8cdcd8
JB
628 if (WARN_ON(sdata->u.ibss.presp))
629 kfree_skb(sdata->u.ibss.presp);
46900298
JB
630 break;
631 case NL80211_IFTYPE_STATION:
05c914fe
JB
632 case NL80211_IFTYPE_WDS:
633 case NL80211_IFTYPE_AP_VLAN:
634 case NL80211_IFTYPE_MONITOR:
75636525 635 break;
05c914fe 636 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 637 case NUM_NL80211_IFTYPES:
75636525
JB
638 BUG();
639 break;
640 }
641
642 flushed = sta_info_flush(local, sdata);
643 WARN_ON(flushed);
f0706e82
JB
644}
645
cf0277e7
JB
646static u16 ieee80211_netdev_select_queue(struct net_device *dev,
647 struct sk_buff *skb)
648{
649 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
650}
651
587e729e
JB
652static const struct net_device_ops ieee80211_dataif_ops = {
653 .ndo_open = ieee80211_open,
654 .ndo_stop = ieee80211_stop,
655 .ndo_uninit = ieee80211_teardown_sdata,
656 .ndo_start_xmit = ieee80211_subif_start_xmit,
657 .ndo_set_multicast_list = ieee80211_set_multicast_list,
658 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 659 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 660 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB
661};
662
cf0277e7
JB
663static u16 ieee80211_monitor_select_queue(struct net_device *dev,
664 struct sk_buff *skb)
665{
666 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
667 struct ieee80211_local *local = sdata->local;
668 struct ieee80211_hdr *hdr;
669 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
193e70ef 670 u8 *p;
cf0277e7
JB
671
672 if (local->hw.queues < 4)
673 return 0;
674
675 if (skb->len < 4 ||
b49bb574 676 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB
677 return 0; /* doesn't matter, frame will be dropped */
678
b49bb574 679 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 680
861a57cd 681 if (!ieee80211_is_data(hdr->frame_control)) {
cf0277e7
JB
682 skb->priority = 7;
683 return ieee802_1d_to_ac[skb->priority];
684 }
861a57cd
FF
685 if (!ieee80211_is_data_qos(hdr->frame_control)) {
686 skb->priority = 0;
687 return ieee802_1d_to_ac[skb->priority];
688 }
cf0277e7 689
193e70ef
FF
690 p = ieee80211_get_qos_ctl(hdr);
691 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
692
cf0277e7
JB
693 return ieee80211_downgrade_queue(local, skb);
694}
695
587e729e
JB
696static const struct net_device_ops ieee80211_monitorif_ops = {
697 .ndo_open = ieee80211_open,
698 .ndo_stop = ieee80211_stop,
699 .ndo_uninit = ieee80211_teardown_sdata,
700 .ndo_start_xmit = ieee80211_monitor_start_xmit,
701 .ndo_set_multicast_list = ieee80211_set_multicast_list,
702 .ndo_change_mtu = ieee80211_change_mtu,
703 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 704 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB
705};
706
707static void ieee80211_if_setup(struct net_device *dev)
708{
709 ether_setup(dev);
710 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB
711 dev->destructor = free_netdev;
712}
713
1fa57d01
JB
714static void ieee80211_iface_work(struct work_struct *work)
715{
716 struct ieee80211_sub_if_data *sdata =
717 container_of(work, struct ieee80211_sub_if_data, work);
718 struct ieee80211_local *local = sdata->local;
719 struct sk_buff *skb;
344eec67 720 struct sta_info *sta;
c1475ca9 721 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB
722
723 if (!ieee80211_sdata_running(sdata))
724 return;
725
726 if (local->scanning)
727 return;
728
729 /*
730 * ieee80211_queue_work() should have picked up most cases,
731 * here we'll pick the rest.
732 */
733 if (WARN(local->suspended,
734 "interface work scheduled while going to suspend\n"))
735 return;
736
737 /* first process frames */
738 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB
739 struct ieee80211_mgmt *mgmt = (void *)skb->data;
740
c1475ca9
JB
741 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
742 ra_tid = (void *)&skb->cb;
743 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
744 ra_tid->tid);
745 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
746 ra_tid = (void *)&skb->cb;
747 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
748 ra_tid->tid);
749 } else if (ieee80211_is_action(mgmt->frame_control) &&
750 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 751 int len = skb->len;
bed7ee6e 752
a93e3644 753 mutex_lock(&local->sta_mtx);
875ae5f6 754 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB
755 if (sta) {
756 switch (mgmt->u.action.u.addba_req.action_code) {
757 case WLAN_ACTION_ADDBA_REQ:
758 ieee80211_process_addba_request(
759 local, sta, mgmt, len);
760 break;
761 case WLAN_ACTION_ADDBA_RESP:
762 ieee80211_process_addba_resp(local, sta,
763 mgmt, len);
764 break;
765 case WLAN_ACTION_DELBA:
766 ieee80211_process_delba(sdata, sta,
767 mgmt, len);
768 break;
769 default:
770 WARN_ON(1);
771 break;
772 }
773 }
a93e3644 774 mutex_unlock(&local->sta_mtx);
344eec67
JB
775 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
776 struct ieee80211_hdr *hdr = (void *)mgmt;
777 /*
778 * So the frame isn't mgmt, but frame_control
779 * is at the right place anyway, of course, so
780 * the if statement is correct.
781 *
782 * Warn if we have other data frame types here,
783 * they must not get here.
784 */
785 WARN_ON(hdr->frame_control &
786 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
787 WARN_ON(!(hdr->seq_ctrl &
788 cpu_to_le16(IEEE80211_SCTL_FRAG)));
789 /*
790 * This was a fragment of a frame, received while
791 * a block-ack session was active. That cannot be
792 * right, so terminate the session.
793 */
a93e3644 794 mutex_lock(&local->sta_mtx);
875ae5f6 795 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB
796 if (sta) {
797 u16 tid = *ieee80211_get_qos_ctl(hdr) &
798 IEEE80211_QOS_CTL_TID_MASK;
799
800 __ieee80211_stop_rx_ba_session(
801 sta, tid, WLAN_BACK_RECIPIENT,
802 WLAN_REASON_QSTA_REQUIRE_SETUP);
803 }
a93e3644 804 mutex_unlock(&local->sta_mtx);
bed7ee6e 805 } else switch (sdata->vif.type) {
1fa57d01
JB
806 case NL80211_IFTYPE_STATION:
807 ieee80211_sta_rx_queued_mgmt(sdata, skb);
808 break;
809 case NL80211_IFTYPE_ADHOC:
810 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
811 break;
812 case NL80211_IFTYPE_MESH_POINT:
813 if (!ieee80211_vif_is_mesh(&sdata->vif))
814 break;
815 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
816 break;
817 default:
818 WARN(1, "frame for unexpected interface type");
1fa57d01
JB
819 break;
820 }
36b3a628
JB
821
822 kfree_skb(skb);
1fa57d01
JB
823 }
824
825 /* then other type-dependent work */
826 switch (sdata->vif.type) {
827 case NL80211_IFTYPE_STATION:
828 ieee80211_sta_work(sdata);
829 break;
830 case NL80211_IFTYPE_ADHOC:
831 ieee80211_ibss_work(sdata);
832 break;
833 case NL80211_IFTYPE_MESH_POINT:
834 if (!ieee80211_vif_is_mesh(&sdata->vif))
835 break;
836 ieee80211_mesh_work(sdata);
837 break;
838 default:
839 break;
840 }
841}
842
843
75636525
JB
844/*
845 * Helper function to initialise an interface to a specific type.
846 */
847static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 848 enum nl80211_iftype type)
f0706e82 849{
75636525
JB
850 /* clear type-dependent union */
851 memset(&sdata->u, 0, sizeof(sdata->u));
852
853 /* and set some type-dependent values */
854 sdata->vif.type = type;
587e729e 855 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
60719ffd 856 sdata->wdev.iftype = type;
75636525
JB
857
858 /* only monitor differs */
859 sdata->dev->type = ARPHRD_ETHER;
860
35f20c14 861 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 862 INIT_WORK(&sdata->work, ieee80211_iface_work);
35f20c14 863
75636525 864 switch (type) {
05c914fe 865 case NL80211_IFTYPE_AP:
75636525
JB
866 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
867 INIT_LIST_HEAD(&sdata->u.ap.vlans);
868 break;
05c914fe 869 case NL80211_IFTYPE_STATION:
9c6bd790 870 ieee80211_sta_setup_sdata(sdata);
472dbc45 871 break;
46900298
JB
872 case NL80211_IFTYPE_ADHOC:
873 ieee80211_ibss_setup_sdata(sdata);
874 break;
05c914fe 875 case NL80211_IFTYPE_MESH_POINT:
75636525
JB
876 if (ieee80211_vif_is_mesh(&sdata->vif))
877 ieee80211_mesh_init_sdata(sdata);
878 break;
05c914fe 879 case NL80211_IFTYPE_MONITOR:
75636525 880 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 881 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB
882 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
883 MONITOR_FLAG_OTHER_BSS;
884 break;
05c914fe
JB
885 case NL80211_IFTYPE_WDS:
886 case NL80211_IFTYPE_AP_VLAN:
75636525 887 break;
05c914fe 888 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 889 case NUM_NL80211_IFTYPES:
75636525
JB
890 BUG();
891 break;
892 }
893
894 ieee80211_debugfs_add_netdev(sdata);
895}
896
f3947e2d 897int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 898 enum nl80211_iftype type)
75636525 899{
f3947e2d
JB
900 ASSERT_RTNL();
901
902 if (type == sdata->vif.type)
903 return 0;
904
e60c7744 905 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
dcebf45c
PR
906 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
907 type == NL80211_IFTYPE_ADHOC)
e60c7744
JB
908 return -EOPNOTSUPP;
909
f3947e2d
JB
910 /*
911 * We could, here, on changes between IBSS/STA/MESH modes,
912 * invoke an MLME function instead that disassociates etc.
913 * and goes into the requested mode.
914 */
915
9607e6b6 916 if (ieee80211_sdata_running(sdata))
f3947e2d
JB
917 return -EBUSY;
918
75636525
JB
919 /* Purge and reset type-dependent state. */
920 ieee80211_teardown_sdata(sdata->dev);
921 ieee80211_setup_sdata(sdata, type);
922
923 /* reset some values that shouldn't be kept across type changes */
bda3933a 924 sdata->vif.bss_conf.basic_rates =
96dd22ac
JB
925 ieee80211_mandatory_rates(sdata->local,
926 sdata->local->hw.conf.channel->band);
75636525 927 sdata->drop_unencrypted = 0;
9bc383de
JB
928 if (type == NL80211_IFTYPE_STATION)
929 sdata->u.mgd.use_4addr = false;
f3947e2d
JB
930
931 return 0;
f0706e82
JB
932}
933
fa9029f8
JB
934static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
935 struct net_device *dev,
936 enum nl80211_iftype type)
937{
938 struct ieee80211_sub_if_data *sdata;
939 u64 mask, start, addr, val, inc;
940 u8 *m;
941 u8 tmp_addr[ETH_ALEN];
942 int i;
943
944 /* default ... something at least */
945 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
946
947 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
948 local->hw.wiphy->n_addresses <= 1)
949 return;
950
951
952 mutex_lock(&local->iflist_mtx);
953
954 switch (type) {
955 case NL80211_IFTYPE_MONITOR:
956 /* doesn't matter */
957 break;
958 case NL80211_IFTYPE_WDS:
959 case NL80211_IFTYPE_AP_VLAN:
960 /* match up with an AP interface */
961 list_for_each_entry(sdata, &local->interfaces, list) {
962 if (sdata->vif.type != NL80211_IFTYPE_AP)
963 continue;
964 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
965 break;
966 }
967 /* keep default if no AP interface present */
968 break;
969 default:
970 /* assign a new address if possible -- try n_addresses first */
971 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
972 bool used = false;
973
974 list_for_each_entry(sdata, &local->interfaces, list) {
975 if (memcmp(local->hw.wiphy->addresses[i].addr,
976 sdata->vif.addr, ETH_ALEN) == 0) {
977 used = true;
978 break;
979 }
980 }
981
982 if (!used) {
983 memcpy(dev->perm_addr,
984 local->hw.wiphy->addresses[i].addr,
985 ETH_ALEN);
986 break;
987 }
988 }
989
990 /* try mask if available */
991 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
992 break;
993
994 m = local->hw.wiphy->addr_mask;
995 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
996 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
997 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
998
999 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1000 /* not a contiguous mask ... not handled now! */
1001 printk(KERN_DEBUG "not contiguous\n");
1002 break;
1003 }
1004
1005 m = local->hw.wiphy->perm_addr;
1006 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1007 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1008 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1009
1010 inc = 1ULL<<__ffs64(mask);
1011 val = (start & mask);
1012 addr = (start & ~mask) | (val & mask);
1013 do {
1014 bool used = false;
1015
1016 tmp_addr[5] = addr >> 0*8;
1017 tmp_addr[4] = addr >> 1*8;
1018 tmp_addr[3] = addr >> 2*8;
1019 tmp_addr[2] = addr >> 3*8;
1020 tmp_addr[1] = addr >> 4*8;
1021 tmp_addr[0] = addr >> 5*8;
1022
1023 val += inc;
1024
1025 list_for_each_entry(sdata, &local->interfaces, list) {
1026 if (memcmp(tmp_addr, sdata->vif.addr,
1027 ETH_ALEN) == 0) {
1028 used = true;
1029 break;
1030 }
1031 }
1032
1033 if (!used) {
1034 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1035 break;
1036 }
1037 addr = (start & ~mask) | (val & mask);
1038 } while (addr != start);
1039
1040 break;
1041 }
1042
1043 mutex_unlock(&local->iflist_mtx);
1044}
1045
3e122be0 1046int ieee80211_if_add(struct ieee80211_local *local, const char *name,
05c914fe 1047 struct net_device **new_dev, enum nl80211_iftype type,
ee385855 1048 struct vif_params *params)
f0706e82
JB
1049{
1050 struct net_device *ndev;
f0706e82 1051 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1052 int ret, i;
f0706e82
JB
1053
1054 ASSERT_RTNL();
75636525 1055
cf0277e7
JB
1056 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1057 name, ieee80211_if_setup, local->hw.queues);
f0706e82
JB
1058 if (!ndev)
1059 return -ENOMEM;
a272a720 1060 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
f0706e82 1061
f3994ece
JB
1062 ndev->needed_headroom = local->tx_headroom +
1063 4*6 /* four MAC addresses */
1064 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1065 + 6 /* mesh */
1066 + 8 /* rfc1042/bridge tunnel */
1067 - ETH_HLEN /* ethernet hard_header_len */
1068 + IEEE80211_ENCRYPT_HEADROOM;
1069 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1070
f0706e82
JB
1071 ret = dev_alloc_name(ndev, ndev->name);
1072 if (ret < 0)
1073 goto fail;
1074
fa9029f8
JB
1075 ieee80211_assign_perm_addr(local, ndev, type);
1076 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f0706e82
JB
1077 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1078
3e122be0
JB
1079 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1080 sdata = netdev_priv(ndev);
f0706e82 1081 ndev->ieee80211_ptr = &sdata->wdev;
47846c9b
JB
1082 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1083 memcpy(sdata->name, ndev->name, IFNAMSIZ);
75636525
JB
1084
1085 /* initialise type-independent data */
f0706e82 1086 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1087 sdata->local = local;
75636525 1088 sdata->dev = ndev;
68542962
JO
1089#ifdef CONFIG_INET
1090 sdata->arp_filter_state = true;
1091#endif
75636525
JB
1092
1093 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1094 skb_queue_head_init(&sdata->fragments[i].skb_list);
1095
1096 INIT_LIST_HEAD(&sdata->key_list);
1097
37eb0b16
JM
1098 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1099 struct ieee80211_supported_band *sband;
1100 sband = local->hw.wiphy->bands[i];
1101 sdata->rc_rateidx_mask[i] =
1102 sband ? (1 << sband->n_bitrates) - 1 : 0;
1103 }
75636525
JB
1104
1105 /* setup type-dependent data */
1106 ieee80211_setup_sdata(sdata, type);
f0706e82 1107
9bc383de
JB
1108 if (params) {
1109 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1110 if (type == NL80211_IFTYPE_STATION)
1111 sdata->u.mgd.use_4addr = params->use_4addr;
1112 }
1113
f0706e82
JB
1114 ret = register_netdevice(ndev);
1115 if (ret)
1116 goto fail;
1117
902acc78
JB
1118 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1119 params && params->mesh_id_len)
472dbc45
JB
1120 ieee80211_sdata_set_mesh_id(sdata,
1121 params->mesh_id_len,
1122 params->mesh_id);
ee385855 1123
c771c9d8 1124 mutex_lock(&local->iflist_mtx);
79010420 1125 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1126 mutex_unlock(&local->iflist_mtx);
79010420 1127
f0706e82
JB
1128 if (new_dev)
1129 *new_dev = ndev;
f0706e82 1130
f0706e82
JB
1131 return 0;
1132
75636525 1133 fail:
f0706e82
JB
1134 free_netdev(ndev);
1135 return ret;
1136}
1137
f698d856 1138void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1139{
f0706e82 1140 ASSERT_RTNL();
11a843b7 1141
c771c9d8 1142 mutex_lock(&sdata->local->iflist_mtx);
75636525 1143 list_del_rcu(&sdata->list);
c771c9d8
JB
1144 mutex_unlock(&sdata->local->iflist_mtx);
1145
75636525 1146 synchronize_rcu();
f698d856 1147 unregister_netdevice(sdata->dev);
f0706e82
JB
1148}
1149
75636525
JB
1150/*
1151 * Remove all interfaces, may only be called at hardware unregistration
1152 * time because it doesn't do RCU-safe list removals.
1153 */
1154void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1155{
75636525 1156 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1157 LIST_HEAD(unreg_list);
f0706e82
JB
1158
1159 ASSERT_RTNL();
1160
efe117ab 1161 mutex_lock(&local->iflist_mtx);
75636525
JB
1162 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1163 list_del(&sdata->list);
c771c9d8 1164
efe117ab 1165 unregister_netdevice_queue(sdata->dev, &unreg_list);
f0706e82 1166 }
efe117ab
ED
1167 mutex_unlock(&local->iflist_mtx);
1168 unregister_netdevice_many(&unreg_list);
f0706e82 1169}
5cff20e6
JB
1170
1171static u32 ieee80211_idle_off(struct ieee80211_local *local,
1172 const char *reason)
1173{
1174 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1175 return 0;
1176
1177#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec 1178 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
5cff20e6
JB
1179#endif
1180
1181 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1182 return IEEE80211_CONF_CHANGE_IDLE;
1183}
1184
1185static u32 ieee80211_idle_on(struct ieee80211_local *local)
1186{
1187 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1188 return 0;
1189
1190#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec 1191 wiphy_debug(local->hw.wiphy, "device now idle\n");
5cff20e6
JB
1192#endif
1193
a80f7c0b
JB
1194 drv_flush(local, false);
1195
5cff20e6
JB
1196 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1197 return IEEE80211_CONF_CHANGE_IDLE;
1198}
1199
1200u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1201{
1202 struct ieee80211_sub_if_data *sdata;
1203 int count = 0;
7da7cc1d
JB
1204 bool working = false, scanning = false;
1205 struct ieee80211_work *wk;
5cff20e6 1206
7da7cc1d
JB
1207#ifdef CONFIG_PROVE_LOCKING
1208 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1209 !lockdep_is_held(&local->iflist_mtx));
1210#endif
1211 lockdep_assert_held(&local->mtx);
5cff20e6
JB
1212
1213 list_for_each_entry(sdata, &local->interfaces, list) {
7da7cc1d
JB
1214 if (!ieee80211_sdata_running(sdata)) {
1215 sdata->vif.bss_conf.idle = true;
5cff20e6 1216 continue;
7da7cc1d
JB
1217 }
1218
1219 sdata->old_idle = sdata->vif.bss_conf.idle;
1220
5cff20e6
JB
1221 /* do not count disabled managed interfaces */
1222 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
7da7cc1d
JB
1223 !sdata->u.mgd.associated) {
1224 sdata->vif.bss_conf.idle = true;
5cff20e6 1225 continue;
7da7cc1d 1226 }
5cff20e6
JB
1227 /* do not count unused IBSS interfaces */
1228 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
7da7cc1d
JB
1229 !sdata->u.ibss.ssid_len) {
1230 sdata->vif.bss_conf.idle = true;
5cff20e6 1231 continue;
7da7cc1d 1232 }
5cff20e6
JB
1233 /* count everything else */
1234 count++;
1235 }
1236
7da7cc1d
JB
1237 list_for_each_entry(wk, &local->work_list, list) {
1238 working = true;
1239 wk->sdata->vif.bss_conf.idle = false;
1240 }
1241
1242 if (local->scan_sdata) {
1243 scanning = true;
1244 local->scan_sdata->vif.bss_conf.idle = false;
1245 }
1246
1247 list_for_each_entry(sdata, &local->interfaces, list) {
1248 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1249 continue;
1250 if (!ieee80211_sdata_running(sdata))
1251 continue;
1252 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1253 }
1254
1255 if (working)
1256 return ieee80211_idle_off(local, "working");
1257 if (scanning)
1258 return ieee80211_idle_off(local, "scanning");
5cff20e6
JB
1259 if (!count)
1260 return ieee80211_idle_on(local);
1261 else
1262 return ieee80211_idle_off(local, "in use");
1263
1264 return 0;
1265}
1266
1267void ieee80211_recalc_idle(struct ieee80211_local *local)
1268{
1269 u32 chg;
1270
1271 mutex_lock(&local->iflist_mtx);
1272 chg = __ieee80211_recalc_idle(local);
1273 mutex_unlock(&local->iflist_mtx);
58905ca5
JB
1274 if (chg)
1275 ieee80211_hw_config(local, chg);
5cff20e6 1276}
47846c9b
JB
1277
1278static int netdev_notify(struct notifier_block *nb,
1279 unsigned long state,
1280 void *ndev)
1281{
1282 struct net_device *dev = ndev;
1283 struct ieee80211_sub_if_data *sdata;
1284
1285 if (state != NETDEV_CHANGENAME)
1286 return 0;
1287
1288 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1289 return 0;
1290
1291 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1292 return 0;
1293
1294 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1295
2f5265e6 1296 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB
1297
1298 ieee80211_debugfs_rename_netdev(sdata);
1299 return 0;
1300}
1301
1302static struct notifier_block mac80211_netdev_notifier = {
1303 .notifier_call = netdev_notify,
1304};
1305
1306int ieee80211_iface_init(void)
1307{
1308 return register_netdevice_notifier(&mac80211_netdev_notifier);
1309}
1310
1311void ieee80211_iface_exit(void)
1312{
1313 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1314}