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mac80211: Check basic rates when peering
[deliverable/linux.git] / net / mac80211 / iface.c
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1/*
2 * Interface handling (except master interface)
3 *
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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 */
13#include <linux/slab.h>
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>
19#include <net/ieee80211_radiotap.h>
20#include "ieee80211_i.h"
21#include "sta_info.h"
22#include "debugfs_netdev.h"
23#include "mesh.h"
24#include "led.h"
25#include "driver-ops.h"
26#include "wme.h"
27#include "rate.h"
28
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
45
46static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
47{
48 int meshhdrlen;
49 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
50
51 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
52
53 /* FIX: what would be proper limits for MTU?
54 * This interface uses 802.3 frames. */
55 if (new_mtu < 256 ||
56 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
57 return -EINVAL;
58 }
59
60#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
61 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
62#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
63 dev->mtu = new_mtu;
64 return 0;
65}
66
67static int ieee80211_change_mac(struct net_device *dev, void *addr)
68{
69 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
70 struct sockaddr *sa = addr;
71 int ret;
72
73 if (ieee80211_sdata_running(sdata))
74 return -EBUSY;
75
76 ret = eth_mac_addr(dev, sa);
77
78 if (ret == 0)
79 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
80
81 return ret;
82}
83
84static inline int identical_mac_addr_allowed(int type1, int type2)
85{
86 return type1 == NL80211_IFTYPE_MONITOR ||
87 type2 == NL80211_IFTYPE_MONITOR ||
88 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
89 (type1 == NL80211_IFTYPE_WDS &&
90 (type2 == NL80211_IFTYPE_WDS ||
91 type2 == NL80211_IFTYPE_AP)) ||
92 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
93 (type1 == NL80211_IFTYPE_AP_VLAN &&
94 (type2 == NL80211_IFTYPE_AP ||
95 type2 == NL80211_IFTYPE_AP_VLAN));
96}
97
98static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
99 enum nl80211_iftype iftype)
100{
101 struct ieee80211_local *local = sdata->local;
102 struct ieee80211_sub_if_data *nsdata;
103 struct net_device *dev = sdata->dev;
104
105 ASSERT_RTNL();
106
107 /* we hold the RTNL here so can safely walk the list */
108 list_for_each_entry(nsdata, &local->interfaces, list) {
109 struct net_device *ndev = nsdata->dev;
110
111 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
112 /*
113 * Allow only a single IBSS interface to be up at any
114 * time. This is restricted because beacon distribution
115 * cannot work properly if both are in the same IBSS.
116 *
117 * To remove this restriction we'd have to disallow them
118 * from setting the same SSID on different IBSS interfaces
119 * belonging to the same hardware. Then, however, we're
120 * faced with having to adopt two different TSF timers...
121 */
122 if (iftype == NL80211_IFTYPE_ADHOC &&
123 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
124 return -EBUSY;
125
126 /*
127 * The remaining checks are only performed for interfaces
128 * with the same MAC address.
129 */
130 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
131 continue;
132
133 /*
134 * check whether it may have the same address
135 */
136 if (!identical_mac_addr_allowed(iftype,
137 nsdata->vif.type))
138 return -ENOTUNIQ;
139
140 /*
141 * can only add VLANs to enabled APs
142 */
143 if (iftype == NL80211_IFTYPE_AP_VLAN &&
144 nsdata->vif.type == NL80211_IFTYPE_AP)
145 sdata->bss = &nsdata->u.ap;
146 }
147 }
148
149 return 0;
150}
151
152void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
153 const int offset)
154{
155 struct ieee80211_local *local = sdata->local;
156 u32 flags = sdata->u.mntr_flags;
157
158#define ADJUST(_f, _s) do { \
159 if (flags & MONITOR_FLAG_##_f) \
160 local->fif_##_s += offset; \
161 } while (0)
162
163 ADJUST(FCSFAIL, fcsfail);
164 ADJUST(PLCPFAIL, plcpfail);
165 ADJUST(CONTROL, control);
166 ADJUST(CONTROL, pspoll);
167 ADJUST(OTHER_BSS, other_bss);
168
169#undef ADJUST
170}
171
172/*
173 * NOTE: Be very careful when changing this function, it must NOT return
174 * an error on interface type changes that have been pre-checked, so most
175 * checks should be in ieee80211_check_concurrent_iface.
176 */
177static int ieee80211_do_open(struct net_device *dev, bool coming_up)
178{
179 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
180 struct ieee80211_local *local = sdata->local;
181 struct sta_info *sta;
182 u32 changed = 0;
183 int res;
184 u32 hw_reconf_flags = 0;
185
186 switch (sdata->vif.type) {
187 case NL80211_IFTYPE_WDS:
188 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
189 return -ENOLINK;
190 break;
191 case NL80211_IFTYPE_AP_VLAN: {
192 struct ieee80211_sub_if_data *master;
193
194 if (!sdata->bss)
195 return -ENOLINK;
196
197 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
198
199 master = container_of(sdata->bss,
200 struct ieee80211_sub_if_data, u.ap);
201 sdata->control_port_protocol =
202 master->control_port_protocol;
203 sdata->control_port_no_encrypt =
204 master->control_port_no_encrypt;
205 break;
206 }
207 case NL80211_IFTYPE_AP:
208 sdata->bss = &sdata->u.ap;
209 break;
210 case NL80211_IFTYPE_MESH_POINT:
211 case NL80211_IFTYPE_STATION:
212 case NL80211_IFTYPE_MONITOR:
213 case NL80211_IFTYPE_ADHOC:
214 /* no special treatment */
215 break;
216 case NL80211_IFTYPE_UNSPECIFIED:
217 case NUM_NL80211_IFTYPES:
218 case NL80211_IFTYPE_P2P_CLIENT:
219 case NL80211_IFTYPE_P2P_GO:
220 /* cannot happen */
221 WARN_ON(1);
222 break;
223 }
224
225 if (local->open_count == 0) {
226 res = drv_start(local);
227 if (res)
228 goto err_del_bss;
229 if (local->ops->napi_poll)
230 napi_enable(&local->napi);
231 /* we're brought up, everything changes */
232 hw_reconf_flags = ~0;
233 ieee80211_led_radio(local, true);
234 ieee80211_mod_tpt_led_trig(local,
235 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
236 }
237
238 /*
239 * Copy the hopefully now-present MAC address to
240 * this interface, if it has the special null one.
241 */
242 if (is_zero_ether_addr(dev->dev_addr)) {
243 memcpy(dev->dev_addr,
244 local->hw.wiphy->perm_addr,
245 ETH_ALEN);
246 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
247
248 if (!is_valid_ether_addr(dev->dev_addr)) {
249 if (!local->open_count)
250 drv_stop(local);
251 return -EADDRNOTAVAIL;
252 }
253 }
254
255 switch (sdata->vif.type) {
256 case NL80211_IFTYPE_AP_VLAN:
257 /* no need to tell driver */
258 break;
259 case NL80211_IFTYPE_MONITOR:
260 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
261 local->cooked_mntrs++;
262 break;
263 }
264
265 /* must be before the call to ieee80211_configure_filter */
266 local->monitors++;
267 if (local->monitors == 1) {
268 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
269 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
270 }
271
272 ieee80211_adjust_monitor_flags(sdata, 1);
273 ieee80211_configure_filter(local);
274
275 netif_carrier_on(dev);
276 break;
277 default:
278 if (coming_up) {
279 res = drv_add_interface(local, sdata);
280 if (res)
281 goto err_stop;
282 }
283
284 if (sdata->vif.type == NL80211_IFTYPE_AP) {
285 local->fif_pspoll++;
286 local->fif_probe_req++;
287
288 ieee80211_configure_filter(local);
289 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
290 local->fif_probe_req++;
291 }
292
293 changed |= ieee80211_reset_erp_info(sdata);
294 ieee80211_bss_info_change_notify(sdata, changed);
295
296 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
297 sdata->vif.type == NL80211_IFTYPE_ADHOC)
298 netif_carrier_off(dev);
299 else
300 netif_carrier_on(dev);
301
302 /*
303 * set default queue parameters so drivers don't
304 * need to initialise the hardware if the hardware
305 * doesn't start up with sane defaults
306 */
307 ieee80211_set_wmm_default(sdata, true);
308 }
309
310 set_bit(SDATA_STATE_RUNNING, &sdata->state);
311
312 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
313 /* Create STA entry for the WDS peer */
314 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
315 GFP_KERNEL);
316 if (!sta) {
317 res = -ENOMEM;
318 goto err_del_interface;
319 }
320
321 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
322 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
323 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
324
325 res = sta_info_insert(sta);
326 if (res) {
327 /* STA has been freed */
328 goto err_del_interface;
329 }
330
331 rate_control_rate_init(sta);
332 }
333
334 /*
335 * set_multicast_list will be invoked by the networking core
336 * which will check whether any increments here were done in
337 * error and sync them down to the hardware as filter flags.
338 */
339 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
340 atomic_inc(&local->iff_allmultis);
341
342 if (sdata->flags & IEEE80211_SDATA_PROMISC)
343 atomic_inc(&local->iff_promiscs);
344
345 mutex_lock(&local->mtx);
346 hw_reconf_flags |= __ieee80211_recalc_idle(local);
347 mutex_unlock(&local->mtx);
348
349 if (coming_up)
350 local->open_count++;
351
352 if (hw_reconf_flags)
353 ieee80211_hw_config(local, hw_reconf_flags);
354
355 ieee80211_recalc_ps(local, -1);
356
357 netif_tx_start_all_queues(dev);
358
359 return 0;
360 err_del_interface:
361 drv_remove_interface(local, sdata);
362 err_stop:
363 if (!local->open_count)
364 drv_stop(local);
365 err_del_bss:
366 sdata->bss = NULL;
367 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
368 list_del(&sdata->u.vlan.list);
369 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
370 return res;
371}
372
373static int ieee80211_open(struct net_device *dev)
374{
375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
376 int err;
377
378 /* fail early if user set an invalid address */
379 if (!is_valid_ether_addr(dev->dev_addr))
380 return -EADDRNOTAVAIL;
381
382 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
383 if (err)
384 return err;
385
386 return ieee80211_do_open(dev, true);
387}
388
389static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
390 bool going_down)
391{
392 struct ieee80211_local *local = sdata->local;
393 unsigned long flags;
394 struct sk_buff *skb, *tmp;
395 u32 hw_reconf_flags = 0;
396 int i;
397 enum nl80211_channel_type orig_ct;
398
399 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
400
401 if (local->scan_sdata == sdata)
402 ieee80211_scan_cancel(local);
403
404 /*
405 * Stop TX on this interface first.
406 */
407 netif_tx_stop_all_queues(sdata->dev);
408
409 /*
410 * Purge work for this interface.
411 */
412 ieee80211_work_purge(sdata);
413
414 /*
415 * Remove all stations associated with this interface.
416 *
417 * This must be done before calling ops->remove_interface()
418 * because otherwise we can later invoke ops->sta_notify()
419 * whenever the STAs are removed, and that invalidates driver
420 * assumptions about always getting a vif pointer that is valid
421 * (because if we remove a STA after ops->remove_interface()
422 * the driver will have removed the vif info already!)
423 *
424 * This is relevant only in AP, WDS and mesh modes, since in
425 * all other modes we've already removed all stations when
426 * disconnecting etc.
427 */
428 sta_info_flush(local, sdata);
429
430 /*
431 * Don't count this interface for promisc/allmulti while it
432 * is down. dev_mc_unsync() will invoke set_multicast_list
433 * on the master interface which will sync these down to the
434 * hardware as filter flags.
435 */
436 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
437 atomic_dec(&local->iff_allmultis);
438
439 if (sdata->flags & IEEE80211_SDATA_PROMISC)
440 atomic_dec(&local->iff_promiscs);
441
442 if (sdata->vif.type == NL80211_IFTYPE_AP) {
443 local->fif_pspoll--;
444 local->fif_probe_req--;
445 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
446 local->fif_probe_req--;
447 }
448
449 netif_addr_lock_bh(sdata->dev);
450 spin_lock_bh(&local->filter_lock);
451 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
452 sdata->dev->addr_len);
453 spin_unlock_bh(&local->filter_lock);
454 netif_addr_unlock_bh(sdata->dev);
455
456 ieee80211_configure_filter(local);
457
458 del_timer_sync(&local->dynamic_ps_timer);
459 cancel_work_sync(&local->dynamic_ps_enable_work);
460
461 /* APs need special treatment */
462 if (sdata->vif.type == NL80211_IFTYPE_AP) {
463 struct ieee80211_sub_if_data *vlan, *tmpsdata;
464 struct beacon_data *old_beacon =
465 rtnl_dereference(sdata->u.ap.beacon);
466 struct sk_buff *old_probe_resp =
467 rtnl_dereference(sdata->u.ap.probe_resp);
468
469 /* sdata_running will return false, so this will disable */
470 ieee80211_bss_info_change_notify(sdata,
471 BSS_CHANGED_BEACON_ENABLED);
472
473 /* remove beacon and probe response */
474 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
475 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
476 synchronize_rcu();
477 kfree(old_beacon);
478 kfree_skb(old_probe_resp);
479
480 /* down all dependent devices, that is VLANs */
481 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
482 u.vlan.list)
483 dev_close(vlan->dev);
484 WARN_ON(!list_empty(&sdata->u.ap.vlans));
485
486 /* free all potentially still buffered bcast frames */
487 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
488 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
489 }
490
491 if (going_down)
492 local->open_count--;
493
494 switch (sdata->vif.type) {
495 case NL80211_IFTYPE_AP_VLAN:
496 list_del(&sdata->u.vlan.list);
497 /* no need to tell driver */
498 break;
499 case NL80211_IFTYPE_MONITOR:
500 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
501 local->cooked_mntrs--;
502 break;
503 }
504
505 local->monitors--;
506 if (local->monitors == 0) {
507 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
508 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
509 }
510
511 ieee80211_adjust_monitor_flags(sdata, -1);
512 ieee80211_configure_filter(local);
513 break;
514 default:
515 flush_work(&sdata->work);
516 /*
517 * When we get here, the interface is marked down.
518 * Call synchronize_rcu() to wait for the RX path
519 * should it be using the interface and enqueuing
520 * frames at this very time on another CPU.
521 */
522 synchronize_rcu();
523 skb_queue_purge(&sdata->skb_queue);
524
525 /*
526 * Disable beaconing here for mesh only, AP and IBSS
527 * are already taken care of.
528 */
529 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
530 ieee80211_bss_info_change_notify(sdata,
531 BSS_CHANGED_BEACON_ENABLED);
532
533 /*
534 * Free all remaining keys, there shouldn't be any,
535 * except maybe group keys in AP more or WDS?
536 */
537 ieee80211_free_keys(sdata);
538
539 if (going_down)
540 drv_remove_interface(local, sdata);
541 }
542
543 sdata->bss = NULL;
544
545 mutex_lock(&local->mtx);
546 hw_reconf_flags |= __ieee80211_recalc_idle(local);
547 mutex_unlock(&local->mtx);
548
549 ieee80211_recalc_ps(local, -1);
550
551 if (local->open_count == 0) {
552 if (local->ops->napi_poll)
553 napi_disable(&local->napi);
554 ieee80211_clear_tx_pending(local);
555 ieee80211_stop_device(local);
556
557 /* no reconfiguring after stop! */
558 hw_reconf_flags = 0;
559 }
560
561 /* Re-calculate channel-type, in case there are multiple vifs
562 * on different channel types.
563 */
564 orig_ct = local->_oper_channel_type;
565 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
566
567 /* do after stop to avoid reconfiguring when we stop anyway */
568 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
569 ieee80211_hw_config(local, hw_reconf_flags);
570
571 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
572 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
573 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
574 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
575 if (info->control.vif == &sdata->vif) {
576 __skb_unlink(skb, &local->pending[i]);
577 dev_kfree_skb_irq(skb);
578 }
579 }
580 }
581 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
582}
583
584static int ieee80211_stop(struct net_device *dev)
585{
586 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
587
588 ieee80211_do_stop(sdata, true);
589
590 return 0;
591}
592
593static void ieee80211_set_multicast_list(struct net_device *dev)
594{
595 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
596 struct ieee80211_local *local = sdata->local;
597 int allmulti, promisc, sdata_allmulti, sdata_promisc;
598
599 allmulti = !!(dev->flags & IFF_ALLMULTI);
600 promisc = !!(dev->flags & IFF_PROMISC);
601 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
602 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
603
604 if (allmulti != sdata_allmulti) {
605 if (dev->flags & IFF_ALLMULTI)
606 atomic_inc(&local->iff_allmultis);
607 else
608 atomic_dec(&local->iff_allmultis);
609 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
610 }
611
612 if (promisc != sdata_promisc) {
613 if (dev->flags & IFF_PROMISC)
614 atomic_inc(&local->iff_promiscs);
615 else
616 atomic_dec(&local->iff_promiscs);
617 sdata->flags ^= IEEE80211_SDATA_PROMISC;
618 }
619 spin_lock_bh(&local->filter_lock);
620 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
621 spin_unlock_bh(&local->filter_lock);
622 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
623}
624
625/*
626 * Called when the netdev is removed or, by the code below, before
627 * the interface type changes.
628 */
629static void ieee80211_teardown_sdata(struct net_device *dev)
630{
631 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
632 struct ieee80211_local *local = sdata->local;
633 int flushed;
634 int i;
635
636 /* free extra data */
637 ieee80211_free_keys(sdata);
638
639 ieee80211_debugfs_remove_netdev(sdata);
640
641 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
642 __skb_queue_purge(&sdata->fragments[i].skb_list);
643 sdata->fragment_next = 0;
644
645 if (ieee80211_vif_is_mesh(&sdata->vif))
646 mesh_rmc_free(sdata);
647 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
648 ieee80211_mgd_teardown(sdata);
649
650 flushed = sta_info_flush(local, sdata);
651 WARN_ON(flushed);
652}
653
654static u16 ieee80211_netdev_select_queue(struct net_device *dev,
655 struct sk_buff *skb)
656{
657 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
658}
659
660static const struct net_device_ops ieee80211_dataif_ops = {
661 .ndo_open = ieee80211_open,
662 .ndo_stop = ieee80211_stop,
663 .ndo_uninit = ieee80211_teardown_sdata,
664 .ndo_start_xmit = ieee80211_subif_start_xmit,
665 .ndo_set_rx_mode = ieee80211_set_multicast_list,
666 .ndo_change_mtu = ieee80211_change_mtu,
667 .ndo_set_mac_address = ieee80211_change_mac,
668 .ndo_select_queue = ieee80211_netdev_select_queue,
669};
670
671static u16 ieee80211_monitor_select_queue(struct net_device *dev,
672 struct sk_buff *skb)
673{
674 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
675 struct ieee80211_local *local = sdata->local;
676 struct ieee80211_hdr *hdr;
677 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
678
679 if (local->hw.queues < IEEE80211_NUM_ACS)
680 return 0;
681
682 if (skb->len < 4 ||
683 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
684 return 0; /* doesn't matter, frame will be dropped */
685
686 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
687
688 return ieee80211_select_queue_80211(local, skb, hdr);
689}
690
691static const struct net_device_ops ieee80211_monitorif_ops = {
692 .ndo_open = ieee80211_open,
693 .ndo_stop = ieee80211_stop,
694 .ndo_uninit = ieee80211_teardown_sdata,
695 .ndo_start_xmit = ieee80211_monitor_start_xmit,
696 .ndo_set_rx_mode = ieee80211_set_multicast_list,
697 .ndo_change_mtu = ieee80211_change_mtu,
698 .ndo_set_mac_address = eth_mac_addr,
699 .ndo_select_queue = ieee80211_monitor_select_queue,
700};
701
702static void ieee80211_if_setup(struct net_device *dev)
703{
704 ether_setup(dev);
705 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
706 dev->netdev_ops = &ieee80211_dataif_ops;
707 dev->destructor = free_netdev;
708}
709
710static void ieee80211_iface_work(struct work_struct *work)
711{
712 struct ieee80211_sub_if_data *sdata =
713 container_of(work, struct ieee80211_sub_if_data, work);
714 struct ieee80211_local *local = sdata->local;
715 struct sk_buff *skb;
716 struct sta_info *sta;
717 struct ieee80211_ra_tid *ra_tid;
718
719 if (!ieee80211_sdata_running(sdata))
720 return;
721
722 if (local->scanning)
723 return;
724
725 /*
726 * ieee80211_queue_work() should have picked up most cases,
727 * here we'll pick the rest.
728 */
729 if (WARN(local->suspended,
730 "interface work scheduled while going to suspend\n"))
731 return;
732
733 /* first process frames */
734 while ((skb = skb_dequeue(&sdata->skb_queue))) {
735 struct ieee80211_mgmt *mgmt = (void *)skb->data;
736
737 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
738 ra_tid = (void *)&skb->cb;
739 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
740 ra_tid->tid);
741 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
742 ra_tid = (void *)&skb->cb;
743 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
744 ra_tid->tid);
745 } else if (ieee80211_is_action(mgmt->frame_control) &&
746 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
747 int len = skb->len;
748
749 mutex_lock(&local->sta_mtx);
750 sta = sta_info_get_bss(sdata, mgmt->sa);
751 if (sta) {
752 switch (mgmt->u.action.u.addba_req.action_code) {
753 case WLAN_ACTION_ADDBA_REQ:
754 ieee80211_process_addba_request(
755 local, sta, mgmt, len);
756 break;
757 case WLAN_ACTION_ADDBA_RESP:
758 ieee80211_process_addba_resp(local, sta,
759 mgmt, len);
760 break;
761 case WLAN_ACTION_DELBA:
762 ieee80211_process_delba(sdata, sta,
763 mgmt, len);
764 break;
765 default:
766 WARN_ON(1);
767 break;
768 }
769 }
770 mutex_unlock(&local->sta_mtx);
771 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
772 struct ieee80211_hdr *hdr = (void *)mgmt;
773 /*
774 * So the frame isn't mgmt, but frame_control
775 * is at the right place anyway, of course, so
776 * the if statement is correct.
777 *
778 * Warn if we have other data frame types here,
779 * they must not get here.
780 */
781 WARN_ON(hdr->frame_control &
782 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
783 WARN_ON(!(hdr->seq_ctrl &
784 cpu_to_le16(IEEE80211_SCTL_FRAG)));
785 /*
786 * This was a fragment of a frame, received while
787 * a block-ack session was active. That cannot be
788 * right, so terminate the session.
789 */
790 mutex_lock(&local->sta_mtx);
791 sta = sta_info_get_bss(sdata, mgmt->sa);
792 if (sta) {
793 u16 tid = *ieee80211_get_qos_ctl(hdr) &
794 IEEE80211_QOS_CTL_TID_MASK;
795
796 __ieee80211_stop_rx_ba_session(
797 sta, tid, WLAN_BACK_RECIPIENT,
798 WLAN_REASON_QSTA_REQUIRE_SETUP,
799 true);
800 }
801 mutex_unlock(&local->sta_mtx);
802 } else switch (sdata->vif.type) {
803 case NL80211_IFTYPE_STATION:
804 ieee80211_sta_rx_queued_mgmt(sdata, skb);
805 break;
806 case NL80211_IFTYPE_ADHOC:
807 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
808 break;
809 case NL80211_IFTYPE_MESH_POINT:
810 if (!ieee80211_vif_is_mesh(&sdata->vif))
811 break;
812 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
813 break;
814 default:
815 WARN(1, "frame for unexpected interface type");
816 break;
817 }
818
819 kfree_skb(skb);
820 }
821
822 /* then other type-dependent work */
823 switch (sdata->vif.type) {
824 case NL80211_IFTYPE_STATION:
825 ieee80211_sta_work(sdata);
826 break;
827 case NL80211_IFTYPE_ADHOC:
828 ieee80211_ibss_work(sdata);
829 break;
830 case NL80211_IFTYPE_MESH_POINT:
831 if (!ieee80211_vif_is_mesh(&sdata->vif))
832 break;
833 ieee80211_mesh_work(sdata);
834 break;
835 default:
836 break;
837 }
838}
839
840
841/*
842 * Helper function to initialise an interface to a specific type.
843 */
844static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
845 enum nl80211_iftype type)
846{
847 /* clear type-dependent union */
848 memset(&sdata->u, 0, sizeof(sdata->u));
849
850 /* and set some type-dependent values */
851 sdata->vif.type = type;
852 sdata->vif.p2p = false;
853 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
854 sdata->wdev.iftype = type;
855
856 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
857 sdata->control_port_no_encrypt = false;
858
859 sdata->noack_map = 0;
860
861 /* only monitor differs */
862 sdata->dev->type = ARPHRD_ETHER;
863
864 skb_queue_head_init(&sdata->skb_queue);
865 INIT_WORK(&sdata->work, ieee80211_iface_work);
866
867 switch (type) {
868 case NL80211_IFTYPE_P2P_GO:
869 type = NL80211_IFTYPE_AP;
870 sdata->vif.type = type;
871 sdata->vif.p2p = true;
872 /* fall through */
873 case NL80211_IFTYPE_AP:
874 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
875 INIT_LIST_HEAD(&sdata->u.ap.vlans);
876 break;
877 case NL80211_IFTYPE_P2P_CLIENT:
878 type = NL80211_IFTYPE_STATION;
879 sdata->vif.type = type;
880 sdata->vif.p2p = true;
881 /* fall through */
882 case NL80211_IFTYPE_STATION:
883 ieee80211_sta_setup_sdata(sdata);
884 break;
885 case NL80211_IFTYPE_ADHOC:
886 ieee80211_ibss_setup_sdata(sdata);
887 break;
888 case NL80211_IFTYPE_MESH_POINT:
889 if (ieee80211_vif_is_mesh(&sdata->vif))
890 ieee80211_mesh_init_sdata(sdata);
891 break;
892 case NL80211_IFTYPE_MONITOR:
893 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
894 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
895 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
896 MONITOR_FLAG_OTHER_BSS;
897 break;
898 case NL80211_IFTYPE_WDS:
899 case NL80211_IFTYPE_AP_VLAN:
900 break;
901 case NL80211_IFTYPE_UNSPECIFIED:
902 case NUM_NL80211_IFTYPES:
903 BUG();
904 break;
905 }
906
907 ieee80211_debugfs_add_netdev(sdata);
908}
909
910static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
911 enum nl80211_iftype type)
912{
913 struct ieee80211_local *local = sdata->local;
914 int ret, err;
915 enum nl80211_iftype internal_type = type;
916 bool p2p = false;
917
918 ASSERT_RTNL();
919
920 if (!local->ops->change_interface)
921 return -EBUSY;
922
923 switch (sdata->vif.type) {
924 case NL80211_IFTYPE_AP:
925 case NL80211_IFTYPE_STATION:
926 case NL80211_IFTYPE_ADHOC:
927 /*
928 * Could maybe also all others here?
929 * Just not sure how that interacts
930 * with the RX/config path e.g. for
931 * mesh.
932 */
933 break;
934 default:
935 return -EBUSY;
936 }
937
938 switch (type) {
939 case NL80211_IFTYPE_AP:
940 case NL80211_IFTYPE_STATION:
941 case NL80211_IFTYPE_ADHOC:
942 /*
943 * Could probably support everything
944 * but WDS here (WDS do_open can fail
945 * under memory pressure, which this
946 * code isn't prepared to handle).
947 */
948 break;
949 case NL80211_IFTYPE_P2P_CLIENT:
950 p2p = true;
951 internal_type = NL80211_IFTYPE_STATION;
952 break;
953 case NL80211_IFTYPE_P2P_GO:
954 p2p = true;
955 internal_type = NL80211_IFTYPE_AP;
956 break;
957 default:
958 return -EBUSY;
959 }
960
961 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
962 if (ret)
963 return ret;
964
965 ieee80211_do_stop(sdata, false);
966
967 ieee80211_teardown_sdata(sdata->dev);
968
969 ret = drv_change_interface(local, sdata, internal_type, p2p);
970 if (ret)
971 type = sdata->vif.type;
972
973 ieee80211_setup_sdata(sdata, type);
974
975 err = ieee80211_do_open(sdata->dev, false);
976 WARN(err, "type change: do_open returned %d", err);
977
978 return ret;
979}
980
981int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
982 enum nl80211_iftype type)
983{
984 int ret;
985
986 ASSERT_RTNL();
987
988 if (type == ieee80211_vif_type_p2p(&sdata->vif))
989 return 0;
990
991 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
992 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
993 type == NL80211_IFTYPE_ADHOC)
994 return -EOPNOTSUPP;
995
996 if (ieee80211_sdata_running(sdata)) {
997 ret = ieee80211_runtime_change_iftype(sdata, type);
998 if (ret)
999 return ret;
1000 } else {
1001 /* Purge and reset type-dependent state. */
1002 ieee80211_teardown_sdata(sdata->dev);
1003 ieee80211_setup_sdata(sdata, type);
1004 }
1005
1006 /* reset some values that shouldn't be kept across type changes */
1007 sdata->vif.bss_conf.basic_rates =
1008 ieee80211_mandatory_rates(sdata->local,
1009 sdata->local->hw.conf.channel->band);
1010 sdata->drop_unencrypted = 0;
1011 if (type == NL80211_IFTYPE_STATION)
1012 sdata->u.mgd.use_4addr = false;
1013
1014 return 0;
1015}
1016
1017static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1018 struct net_device *dev,
1019 enum nl80211_iftype type)
1020{
1021 struct ieee80211_sub_if_data *sdata;
1022 u64 mask, start, addr, val, inc;
1023 u8 *m;
1024 u8 tmp_addr[ETH_ALEN];
1025 int i;
1026
1027 /* default ... something at least */
1028 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1029
1030 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1031 local->hw.wiphy->n_addresses <= 1)
1032 return;
1033
1034
1035 mutex_lock(&local->iflist_mtx);
1036
1037 switch (type) {
1038 case NL80211_IFTYPE_MONITOR:
1039 /* doesn't matter */
1040 break;
1041 case NL80211_IFTYPE_WDS:
1042 case NL80211_IFTYPE_AP_VLAN:
1043 /* match up with an AP interface */
1044 list_for_each_entry(sdata, &local->interfaces, list) {
1045 if (sdata->vif.type != NL80211_IFTYPE_AP)
1046 continue;
1047 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1048 break;
1049 }
1050 /* keep default if no AP interface present */
1051 break;
1052 default:
1053 /* assign a new address if possible -- try n_addresses first */
1054 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1055 bool used = false;
1056
1057 list_for_each_entry(sdata, &local->interfaces, list) {
1058 if (memcmp(local->hw.wiphy->addresses[i].addr,
1059 sdata->vif.addr, ETH_ALEN) == 0) {
1060 used = true;
1061 break;
1062 }
1063 }
1064
1065 if (!used) {
1066 memcpy(dev->perm_addr,
1067 local->hw.wiphy->addresses[i].addr,
1068 ETH_ALEN);
1069 break;
1070 }
1071 }
1072
1073 /* try mask if available */
1074 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1075 break;
1076
1077 m = local->hw.wiphy->addr_mask;
1078 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1079 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1080 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1081
1082 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1083 /* not a contiguous mask ... not handled now! */
1084 printk(KERN_DEBUG "not contiguous\n");
1085 break;
1086 }
1087
1088 m = local->hw.wiphy->perm_addr;
1089 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1090 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1091 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1092
1093 inc = 1ULL<<__ffs64(mask);
1094 val = (start & mask);
1095 addr = (start & ~mask) | (val & mask);
1096 do {
1097 bool used = false;
1098
1099 tmp_addr[5] = addr >> 0*8;
1100 tmp_addr[4] = addr >> 1*8;
1101 tmp_addr[3] = addr >> 2*8;
1102 tmp_addr[2] = addr >> 3*8;
1103 tmp_addr[1] = addr >> 4*8;
1104 tmp_addr[0] = addr >> 5*8;
1105
1106 val += inc;
1107
1108 list_for_each_entry(sdata, &local->interfaces, list) {
1109 if (memcmp(tmp_addr, sdata->vif.addr,
1110 ETH_ALEN) == 0) {
1111 used = true;
1112 break;
1113 }
1114 }
1115
1116 if (!used) {
1117 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1118 break;
1119 }
1120 addr = (start & ~mask) | (val & mask);
1121 } while (addr != start);
1122
1123 break;
1124 }
1125
1126 mutex_unlock(&local->iflist_mtx);
1127}
1128
1129int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1130 struct net_device **new_dev, enum nl80211_iftype type,
1131 struct vif_params *params)
1132{
1133 struct net_device *ndev;
1134 struct ieee80211_sub_if_data *sdata = NULL;
1135 int ret, i;
1136 int txqs = 1;
1137
1138 ASSERT_RTNL();
1139
1140 if (local->hw.queues >= IEEE80211_NUM_ACS)
1141 txqs = IEEE80211_NUM_ACS;
1142
1143 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1144 name, ieee80211_if_setup, txqs, 1);
1145 if (!ndev)
1146 return -ENOMEM;
1147 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1148
1149 ndev->needed_headroom = local->tx_headroom +
1150 4*6 /* four MAC addresses */
1151 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1152 + 6 /* mesh */
1153 + 8 /* rfc1042/bridge tunnel */
1154 - ETH_HLEN /* ethernet hard_header_len */
1155 + IEEE80211_ENCRYPT_HEADROOM;
1156 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1157
1158 ret = dev_alloc_name(ndev, ndev->name);
1159 if (ret < 0)
1160 goto fail;
1161
1162 ieee80211_assign_perm_addr(local, ndev, type);
1163 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1164 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1165
1166 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1167 sdata = netdev_priv(ndev);
1168 ndev->ieee80211_ptr = &sdata->wdev;
1169 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1170 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1171
1172 /* initialise type-independent data */
1173 sdata->wdev.wiphy = local->hw.wiphy;
1174 sdata->local = local;
1175 sdata->dev = ndev;
1176#ifdef CONFIG_INET
1177 sdata->arp_filter_state = true;
1178#endif
1179
1180 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1181 skb_queue_head_init(&sdata->fragments[i].skb_list);
1182
1183 INIT_LIST_HEAD(&sdata->key_list);
1184
1185 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1186 struct ieee80211_supported_band *sband;
1187 sband = local->hw.wiphy->bands[i];
1188 sdata->rc_rateidx_mask[i] =
1189 sband ? (1 << sband->n_bitrates) - 1 : 0;
1190 if (sband)
1191 memcpy(sdata->rc_rateidx_mcs_mask[i],
1192 sband->ht_cap.mcs.rx_mask,
1193 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1194 else
1195 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1196 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1197 }
1198
1199 /* setup type-dependent data */
1200 ieee80211_setup_sdata(sdata, type);
1201
1202 if (params) {
1203 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1204 if (type == NL80211_IFTYPE_STATION)
1205 sdata->u.mgd.use_4addr = params->use_4addr;
1206 }
1207
1208 ret = register_netdevice(ndev);
1209 if (ret)
1210 goto fail;
1211
1212 mutex_lock(&local->iflist_mtx);
1213 list_add_tail_rcu(&sdata->list, &local->interfaces);
1214 mutex_unlock(&local->iflist_mtx);
1215
1216 if (new_dev)
1217 *new_dev = ndev;
1218
1219 return 0;
1220
1221 fail:
1222 free_netdev(ndev);
1223 return ret;
1224}
1225
1226void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1227{
1228 ASSERT_RTNL();
1229
1230 mutex_lock(&sdata->local->iflist_mtx);
1231 list_del_rcu(&sdata->list);
1232 mutex_unlock(&sdata->local->iflist_mtx);
1233
1234 if (ieee80211_vif_is_mesh(&sdata->vif))
1235 mesh_path_flush_by_iface(sdata);
1236
1237 synchronize_rcu();
1238 unregister_netdevice(sdata->dev);
1239}
1240
1241/*
1242 * Remove all interfaces, may only be called at hardware unregistration
1243 * time because it doesn't do RCU-safe list removals.
1244 */
1245void ieee80211_remove_interfaces(struct ieee80211_local *local)
1246{
1247 struct ieee80211_sub_if_data *sdata, *tmp;
1248 LIST_HEAD(unreg_list);
1249
1250 ASSERT_RTNL();
1251
1252 mutex_lock(&local->iflist_mtx);
1253 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1254 list_del(&sdata->list);
1255
1256 if (ieee80211_vif_is_mesh(&sdata->vif))
1257 mesh_path_flush_by_iface(sdata);
1258
1259 unregister_netdevice_queue(sdata->dev, &unreg_list);
1260 }
1261 mutex_unlock(&local->iflist_mtx);
1262 unregister_netdevice_many(&unreg_list);
1263 list_del(&unreg_list);
1264}
1265
1266static u32 ieee80211_idle_off(struct ieee80211_local *local,
1267 const char *reason)
1268{
1269 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1270 return 0;
1271
1272#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1273 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1274#endif
1275
1276 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1277 return IEEE80211_CONF_CHANGE_IDLE;
1278}
1279
1280static u32 ieee80211_idle_on(struct ieee80211_local *local)
1281{
1282 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1283 return 0;
1284
1285#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1286 wiphy_debug(local->hw.wiphy, "device now idle\n");
1287#endif
1288
1289 drv_flush(local, false);
1290
1291 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1292 return IEEE80211_CONF_CHANGE_IDLE;
1293}
1294
1295u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1296{
1297 struct ieee80211_sub_if_data *sdata;
1298 int count = 0;
1299 bool working = false, scanning = false, hw_roc = false;
1300 struct ieee80211_work *wk;
1301 unsigned int led_trig_start = 0, led_trig_stop = 0;
1302
1303#ifdef CONFIG_PROVE_LOCKING
1304 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1305 !lockdep_is_held(&local->iflist_mtx));
1306#endif
1307 lockdep_assert_held(&local->mtx);
1308
1309 list_for_each_entry(sdata, &local->interfaces, list) {
1310 if (!ieee80211_sdata_running(sdata)) {
1311 sdata->vif.bss_conf.idle = true;
1312 continue;
1313 }
1314
1315 sdata->old_idle = sdata->vif.bss_conf.idle;
1316
1317 /* do not count disabled managed interfaces */
1318 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1319 !sdata->u.mgd.associated &&
1320 !sdata->u.mgd.auth_data &&
1321 !sdata->u.mgd.assoc_data) {
1322 sdata->vif.bss_conf.idle = true;
1323 continue;
1324 }
1325 /* do not count unused IBSS interfaces */
1326 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1327 !sdata->u.ibss.ssid_len) {
1328 sdata->vif.bss_conf.idle = true;
1329 continue;
1330 }
1331 /* count everything else */
1332 sdata->vif.bss_conf.idle = false;
1333 count++;
1334 }
1335
1336 list_for_each_entry(wk, &local->work_list, list) {
1337 working = true;
1338 wk->sdata->vif.bss_conf.idle = false;
1339 }
1340
1341 if (local->scan_sdata &&
1342 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
1343 scanning = true;
1344 local->scan_sdata->vif.bss_conf.idle = false;
1345 }
1346
1347 if (local->hw_roc_channel)
1348 hw_roc = true;
1349
1350 list_for_each_entry(sdata, &local->interfaces, list) {
1351 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1352 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1353 continue;
1354 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1355 continue;
1356 if (!ieee80211_sdata_running(sdata))
1357 continue;
1358 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1359 }
1360
1361 if (working || scanning || hw_roc)
1362 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1363 else
1364 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1365
1366 if (count)
1367 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1368 else
1369 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1370
1371 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1372
1373 if (hw_roc)
1374 return ieee80211_idle_off(local, "hw remain-on-channel");
1375 if (working)
1376 return ieee80211_idle_off(local, "working");
1377 if (scanning)
1378 return ieee80211_idle_off(local, "scanning");
1379 if (!count)
1380 return ieee80211_idle_on(local);
1381 else
1382 return ieee80211_idle_off(local, "in use");
1383
1384 return 0;
1385}
1386
1387void ieee80211_recalc_idle(struct ieee80211_local *local)
1388{
1389 u32 chg;
1390
1391 mutex_lock(&local->iflist_mtx);
1392 chg = __ieee80211_recalc_idle(local);
1393 mutex_unlock(&local->iflist_mtx);
1394 if (chg)
1395 ieee80211_hw_config(local, chg);
1396}
1397
1398static int netdev_notify(struct notifier_block *nb,
1399 unsigned long state,
1400 void *ndev)
1401{
1402 struct net_device *dev = ndev;
1403 struct ieee80211_sub_if_data *sdata;
1404
1405 if (state != NETDEV_CHANGENAME)
1406 return 0;
1407
1408 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1409 return 0;
1410
1411 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1412 return 0;
1413
1414 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1415
1416 memcpy(sdata->name, dev->name, IFNAMSIZ);
1417
1418 ieee80211_debugfs_rename_netdev(sdata);
1419 return 0;
1420}
1421
1422static struct notifier_block mac80211_netdev_notifier = {
1423 .notifier_call = netdev_notify,
1424};
1425
1426int ieee80211_iface_init(void)
1427{
1428 return register_netdevice_notifier(&mac80211_netdev_notifier);
1429}
1430
1431void ieee80211_iface_exit(void)
1432{
1433 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1434}
Linux kernel - Deliverables
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