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Merge tag 'v3.5-rc6' into irqdomain/next
[deliverable/linux.git] / net / mac80211 / iface.c
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
46 static 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
67 static 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
84 static 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
98 static 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 (!ether_addr_equal(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
152 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
153 {
154 int n_queues = sdata->local->hw.queues;
155 int i;
156
157 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
158 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
159 IEEE80211_INVAL_HW_QUEUE))
160 return -EINVAL;
161 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
162 n_queues))
163 return -EINVAL;
164 }
165
166 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
167 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
168 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
169 return 0;
170 }
171
172 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
173 return -EINVAL;
174
175 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
176 return -EINVAL;
177
178 return 0;
179 }
180
181 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
182 const int offset)
183 {
184 struct ieee80211_local *local = sdata->local;
185 u32 flags = sdata->u.mntr_flags;
186
187 #define ADJUST(_f, _s) do { \
188 if (flags & MONITOR_FLAG_##_f) \
189 local->fif_##_s += offset; \
190 } while (0)
191
192 ADJUST(FCSFAIL, fcsfail);
193 ADJUST(PLCPFAIL, plcpfail);
194 ADJUST(CONTROL, control);
195 ADJUST(CONTROL, pspoll);
196 ADJUST(OTHER_BSS, other_bss);
197
198 #undef ADJUST
199 }
200
201 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
202 {
203 struct ieee80211_local *local = sdata->local;
204 int i;
205
206 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
207 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
208 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
209 else if (local->hw.queues >= IEEE80211_NUM_ACS)
210 sdata->vif.hw_queue[i] = i;
211 else
212 sdata->vif.hw_queue[i] = 0;
213 }
214 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
215 }
216
217 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
218 {
219 struct ieee80211_sub_if_data *sdata;
220 int ret;
221
222 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
223 return 0;
224
225 if (local->monitor_sdata)
226 return 0;
227
228 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
229 if (!sdata)
230 return -ENOMEM;
231
232 /* set up data */
233 sdata->local = local;
234 sdata->vif.type = NL80211_IFTYPE_MONITOR;
235 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
236 wiphy_name(local->hw.wiphy));
237
238 ieee80211_set_default_queues(sdata);
239
240 ret = drv_add_interface(local, sdata);
241 if (WARN_ON(ret)) {
242 /* ok .. stupid driver, it asked for this! */
243 kfree(sdata);
244 return ret;
245 }
246
247 ret = ieee80211_check_queues(sdata);
248 if (ret) {
249 kfree(sdata);
250 return ret;
251 }
252
253 rcu_assign_pointer(local->monitor_sdata, sdata);
254
255 return 0;
256 }
257
258 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
259 {
260 struct ieee80211_sub_if_data *sdata;
261
262 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
263 return;
264
265 sdata = rtnl_dereference(local->monitor_sdata);
266
267 if (!sdata)
268 return;
269
270 rcu_assign_pointer(local->monitor_sdata, NULL);
271 synchronize_net();
272
273 drv_remove_interface(local, sdata);
274
275 kfree(sdata);
276 }
277
278 /*
279 * NOTE: Be very careful when changing this function, it must NOT return
280 * an error on interface type changes that have been pre-checked, so most
281 * checks should be in ieee80211_check_concurrent_iface.
282 */
283 static int ieee80211_do_open(struct net_device *dev, bool coming_up)
284 {
285 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
286 struct ieee80211_local *local = sdata->local;
287 struct sta_info *sta;
288 u32 changed = 0;
289 int res;
290 u32 hw_reconf_flags = 0;
291
292 switch (sdata->vif.type) {
293 case NL80211_IFTYPE_WDS:
294 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
295 return -ENOLINK;
296 break;
297 case NL80211_IFTYPE_AP_VLAN: {
298 struct ieee80211_sub_if_data *master;
299
300 if (!sdata->bss)
301 return -ENOLINK;
302
303 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
304
305 master = container_of(sdata->bss,
306 struct ieee80211_sub_if_data, u.ap);
307 sdata->control_port_protocol =
308 master->control_port_protocol;
309 sdata->control_port_no_encrypt =
310 master->control_port_no_encrypt;
311 break;
312 }
313 case NL80211_IFTYPE_AP:
314 sdata->bss = &sdata->u.ap;
315 break;
316 case NL80211_IFTYPE_MESH_POINT:
317 case NL80211_IFTYPE_STATION:
318 case NL80211_IFTYPE_MONITOR:
319 case NL80211_IFTYPE_ADHOC:
320 /* no special treatment */
321 break;
322 case NL80211_IFTYPE_UNSPECIFIED:
323 case NUM_NL80211_IFTYPES:
324 case NL80211_IFTYPE_P2P_CLIENT:
325 case NL80211_IFTYPE_P2P_GO:
326 /* cannot happen */
327 WARN_ON(1);
328 break;
329 }
330
331 if (local->open_count == 0) {
332 res = drv_start(local);
333 if (res)
334 goto err_del_bss;
335 if (local->ops->napi_poll)
336 napi_enable(&local->napi);
337 /* we're brought up, everything changes */
338 hw_reconf_flags = ~0;
339 ieee80211_led_radio(local, true);
340 ieee80211_mod_tpt_led_trig(local,
341 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
342 }
343
344 /*
345 * Copy the hopefully now-present MAC address to
346 * this interface, if it has the special null one.
347 */
348 if (is_zero_ether_addr(dev->dev_addr)) {
349 memcpy(dev->dev_addr,
350 local->hw.wiphy->perm_addr,
351 ETH_ALEN);
352 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
353
354 if (!is_valid_ether_addr(dev->dev_addr)) {
355 res = -EADDRNOTAVAIL;
356 goto err_stop;
357 }
358 }
359
360 switch (sdata->vif.type) {
361 case NL80211_IFTYPE_AP_VLAN:
362 /* no need to tell driver, but set carrier */
363 if (rtnl_dereference(sdata->bss->beacon))
364 netif_carrier_on(dev);
365 else
366 netif_carrier_off(dev);
367 break;
368 case NL80211_IFTYPE_MONITOR:
369 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
370 local->cooked_mntrs++;
371 break;
372 }
373
374 if (local->monitors == 0 && local->open_count == 0) {
375 res = ieee80211_add_virtual_monitor(local);
376 if (res)
377 goto err_stop;
378 }
379
380 /* must be before the call to ieee80211_configure_filter */
381 local->monitors++;
382 if (local->monitors == 1) {
383 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
384 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
385 }
386
387 ieee80211_adjust_monitor_flags(sdata, 1);
388 ieee80211_configure_filter(local);
389
390 netif_carrier_on(dev);
391 break;
392 default:
393 if (coming_up) {
394 ieee80211_del_virtual_monitor(local);
395
396 res = drv_add_interface(local, sdata);
397 if (res)
398 goto err_stop;
399 res = ieee80211_check_queues(sdata);
400 if (res)
401 goto err_del_interface;
402 }
403
404 if (sdata->vif.type == NL80211_IFTYPE_AP) {
405 local->fif_pspoll++;
406 local->fif_probe_req++;
407
408 ieee80211_configure_filter(local);
409 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
410 local->fif_probe_req++;
411 }
412
413 changed |= ieee80211_reset_erp_info(sdata);
414 ieee80211_bss_info_change_notify(sdata, changed);
415
416 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
417 sdata->vif.type == NL80211_IFTYPE_ADHOC ||
418 sdata->vif.type == NL80211_IFTYPE_AP)
419 netif_carrier_off(dev);
420 else
421 netif_carrier_on(dev);
422
423 /*
424 * set default queue parameters so drivers don't
425 * need to initialise the hardware if the hardware
426 * doesn't start up with sane defaults
427 */
428 ieee80211_set_wmm_default(sdata, true);
429 }
430
431 set_bit(SDATA_STATE_RUNNING, &sdata->state);
432
433 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
434 /* Create STA entry for the WDS peer */
435 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
436 GFP_KERNEL);
437 if (!sta) {
438 res = -ENOMEM;
439 goto err_del_interface;
440 }
441
442 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
443 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
444 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
445
446 res = sta_info_insert(sta);
447 if (res) {
448 /* STA has been freed */
449 goto err_del_interface;
450 }
451
452 rate_control_rate_init(sta);
453 }
454
455 /*
456 * set_multicast_list will be invoked by the networking core
457 * which will check whether any increments here were done in
458 * error and sync them down to the hardware as filter flags.
459 */
460 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
461 atomic_inc(&local->iff_allmultis);
462
463 if (sdata->flags & IEEE80211_SDATA_PROMISC)
464 atomic_inc(&local->iff_promiscs);
465
466 mutex_lock(&local->mtx);
467 hw_reconf_flags |= __ieee80211_recalc_idle(local);
468 mutex_unlock(&local->mtx);
469
470 if (coming_up)
471 local->open_count++;
472
473 if (hw_reconf_flags)
474 ieee80211_hw_config(local, hw_reconf_flags);
475
476 ieee80211_recalc_ps(local, -1);
477
478 netif_tx_start_all_queues(dev);
479
480 return 0;
481 err_del_interface:
482 drv_remove_interface(local, sdata);
483 err_stop:
484 if (!local->open_count)
485 drv_stop(local);
486 err_del_bss:
487 sdata->bss = NULL;
488 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
489 list_del(&sdata->u.vlan.list);
490 /* might already be clear but that doesn't matter */
491 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
492 return res;
493 }
494
495 static int ieee80211_open(struct net_device *dev)
496 {
497 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
498 int err;
499
500 /* fail early if user set an invalid address */
501 if (!is_valid_ether_addr(dev->dev_addr))
502 return -EADDRNOTAVAIL;
503
504 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
505 if (err)
506 return err;
507
508 return ieee80211_do_open(dev, true);
509 }
510
511 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
512 bool going_down)
513 {
514 struct ieee80211_local *local = sdata->local;
515 unsigned long flags;
516 struct sk_buff *skb, *tmp;
517 u32 hw_reconf_flags = 0;
518 int i;
519 enum nl80211_channel_type orig_ct;
520
521 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
522
523 if (local->scan_sdata == sdata)
524 ieee80211_scan_cancel(local);
525
526 /*
527 * Stop TX on this interface first.
528 */
529 netif_tx_stop_all_queues(sdata->dev);
530
531 /*
532 * Purge work for this interface.
533 */
534 ieee80211_work_purge(sdata);
535
536 /*
537 * Remove all stations associated with this interface.
538 *
539 * This must be done before calling ops->remove_interface()
540 * because otherwise we can later invoke ops->sta_notify()
541 * whenever the STAs are removed, and that invalidates driver
542 * assumptions about always getting a vif pointer that is valid
543 * (because if we remove a STA after ops->remove_interface()
544 * the driver will have removed the vif info already!)
545 *
546 * This is relevant only in AP, WDS and mesh modes, since in
547 * all other modes we've already removed all stations when
548 * disconnecting etc.
549 */
550 sta_info_flush(local, sdata);
551
552 /*
553 * Don't count this interface for promisc/allmulti while it
554 * is down. dev_mc_unsync() will invoke set_multicast_list
555 * on the master interface which will sync these down to the
556 * hardware as filter flags.
557 */
558 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
559 atomic_dec(&local->iff_allmultis);
560
561 if (sdata->flags & IEEE80211_SDATA_PROMISC)
562 atomic_dec(&local->iff_promiscs);
563
564 if (sdata->vif.type == NL80211_IFTYPE_AP) {
565 local->fif_pspoll--;
566 local->fif_probe_req--;
567 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
568 local->fif_probe_req--;
569 }
570
571 netif_addr_lock_bh(sdata->dev);
572 spin_lock_bh(&local->filter_lock);
573 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
574 sdata->dev->addr_len);
575 spin_unlock_bh(&local->filter_lock);
576 netif_addr_unlock_bh(sdata->dev);
577
578 ieee80211_configure_filter(local);
579
580 del_timer_sync(&local->dynamic_ps_timer);
581 cancel_work_sync(&local->dynamic_ps_enable_work);
582
583 /* APs need special treatment */
584 if (sdata->vif.type == NL80211_IFTYPE_AP) {
585 struct ieee80211_sub_if_data *vlan, *tmpsdata;
586 struct beacon_data *old_beacon =
587 rtnl_dereference(sdata->u.ap.beacon);
588 struct sk_buff *old_probe_resp =
589 rtnl_dereference(sdata->u.ap.probe_resp);
590
591 /* sdata_running will return false, so this will disable */
592 ieee80211_bss_info_change_notify(sdata,
593 BSS_CHANGED_BEACON_ENABLED);
594
595 /* remove beacon and probe response */
596 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
597 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
598 synchronize_rcu();
599 kfree(old_beacon);
600 kfree_skb(old_probe_resp);
601
602 /* down all dependent devices, that is VLANs */
603 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
604 u.vlan.list)
605 dev_close(vlan->dev);
606 WARN_ON(!list_empty(&sdata->u.ap.vlans));
607
608 /* free all potentially still buffered bcast frames */
609 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
610 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
611 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
612 ieee80211_mgd_stop(sdata);
613 }
614
615 if (going_down)
616 local->open_count--;
617
618 switch (sdata->vif.type) {
619 case NL80211_IFTYPE_AP_VLAN:
620 list_del(&sdata->u.vlan.list);
621 /* no need to tell driver */
622 break;
623 case NL80211_IFTYPE_MONITOR:
624 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
625 local->cooked_mntrs--;
626 break;
627 }
628
629 local->monitors--;
630 if (local->monitors == 0) {
631 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
632 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
633 ieee80211_del_virtual_monitor(local);
634 }
635
636 ieee80211_adjust_monitor_flags(sdata, -1);
637 ieee80211_configure_filter(local);
638 break;
639 default:
640 mutex_lock(&local->mtx);
641 if (local->hw_roc_dev == sdata->dev &&
642 local->hw_roc_channel) {
643 /* ignore return value since this is racy */
644 drv_cancel_remain_on_channel(local);
645 ieee80211_queue_work(&local->hw, &local->hw_roc_done);
646 }
647 mutex_unlock(&local->mtx);
648
649 flush_work(&local->hw_roc_start);
650 flush_work(&local->hw_roc_done);
651
652 flush_work(&sdata->work);
653 /*
654 * When we get here, the interface is marked down.
655 * Call synchronize_rcu() to wait for the RX path
656 * should it be using the interface and enqueuing
657 * frames at this very time on another CPU.
658 */
659 synchronize_rcu();
660 skb_queue_purge(&sdata->skb_queue);
661
662 /*
663 * Disable beaconing here for mesh only, AP and IBSS
664 * are already taken care of.
665 */
666 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
667 ieee80211_bss_info_change_notify(sdata,
668 BSS_CHANGED_BEACON_ENABLED);
669
670 /*
671 * Free all remaining keys, there shouldn't be any,
672 * except maybe group keys in AP more or WDS?
673 */
674 ieee80211_free_keys(sdata);
675
676 if (going_down)
677 drv_remove_interface(local, sdata);
678 }
679
680 sdata->bss = NULL;
681
682 mutex_lock(&local->mtx);
683 hw_reconf_flags |= __ieee80211_recalc_idle(local);
684 mutex_unlock(&local->mtx);
685
686 ieee80211_recalc_ps(local, -1);
687
688 if (local->open_count == 0) {
689 if (local->ops->napi_poll)
690 napi_disable(&local->napi);
691 ieee80211_clear_tx_pending(local);
692 ieee80211_stop_device(local);
693
694 /* no reconfiguring after stop! */
695 hw_reconf_flags = 0;
696 }
697
698 /* Re-calculate channel-type, in case there are multiple vifs
699 * on different channel types.
700 */
701 orig_ct = local->_oper_channel_type;
702 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
703
704 /* do after stop to avoid reconfiguring when we stop anyway */
705 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
706 ieee80211_hw_config(local, hw_reconf_flags);
707
708 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
709 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
710 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
711 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
712 if (info->control.vif == &sdata->vif) {
713 __skb_unlink(skb, &local->pending[i]);
714 dev_kfree_skb_irq(skb);
715 }
716 }
717 }
718 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
719
720 if (local->monitors == local->open_count && local->monitors > 0)
721 ieee80211_add_virtual_monitor(local);
722 }
723
724 static int ieee80211_stop(struct net_device *dev)
725 {
726 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
727
728 ieee80211_do_stop(sdata, true);
729
730 return 0;
731 }
732
733 static void ieee80211_set_multicast_list(struct net_device *dev)
734 {
735 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
736 struct ieee80211_local *local = sdata->local;
737 int allmulti, promisc, sdata_allmulti, sdata_promisc;
738
739 allmulti = !!(dev->flags & IFF_ALLMULTI);
740 promisc = !!(dev->flags & IFF_PROMISC);
741 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
742 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
743
744 if (allmulti != sdata_allmulti) {
745 if (dev->flags & IFF_ALLMULTI)
746 atomic_inc(&local->iff_allmultis);
747 else
748 atomic_dec(&local->iff_allmultis);
749 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
750 }
751
752 if (promisc != sdata_promisc) {
753 if (dev->flags & IFF_PROMISC)
754 atomic_inc(&local->iff_promiscs);
755 else
756 atomic_dec(&local->iff_promiscs);
757 sdata->flags ^= IEEE80211_SDATA_PROMISC;
758 }
759 spin_lock_bh(&local->filter_lock);
760 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
761 spin_unlock_bh(&local->filter_lock);
762 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
763 }
764
765 /*
766 * Called when the netdev is removed or, by the code below, before
767 * the interface type changes.
768 */
769 static void ieee80211_teardown_sdata(struct net_device *dev)
770 {
771 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
772 struct ieee80211_local *local = sdata->local;
773 int flushed;
774 int i;
775
776 /* free extra data */
777 ieee80211_free_keys(sdata);
778
779 ieee80211_debugfs_remove_netdev(sdata);
780
781 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
782 __skb_queue_purge(&sdata->fragments[i].skb_list);
783 sdata->fragment_next = 0;
784
785 if (ieee80211_vif_is_mesh(&sdata->vif))
786 mesh_rmc_free(sdata);
787
788 flushed = sta_info_flush(local, sdata);
789 WARN_ON(flushed);
790 }
791
792 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
793 struct sk_buff *skb)
794 {
795 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
796 }
797
798 static const struct net_device_ops ieee80211_dataif_ops = {
799 .ndo_open = ieee80211_open,
800 .ndo_stop = ieee80211_stop,
801 .ndo_uninit = ieee80211_teardown_sdata,
802 .ndo_start_xmit = ieee80211_subif_start_xmit,
803 .ndo_set_rx_mode = ieee80211_set_multicast_list,
804 .ndo_change_mtu = ieee80211_change_mtu,
805 .ndo_set_mac_address = ieee80211_change_mac,
806 .ndo_select_queue = ieee80211_netdev_select_queue,
807 };
808
809 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
810 struct sk_buff *skb)
811 {
812 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
813 struct ieee80211_local *local = sdata->local;
814 struct ieee80211_hdr *hdr;
815 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
816
817 if (local->hw.queues < IEEE80211_NUM_ACS)
818 return 0;
819
820 if (skb->len < 4 ||
821 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
822 return 0; /* doesn't matter, frame will be dropped */
823
824 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
825
826 return ieee80211_select_queue_80211(local, skb, hdr);
827 }
828
829 static const struct net_device_ops ieee80211_monitorif_ops = {
830 .ndo_open = ieee80211_open,
831 .ndo_stop = ieee80211_stop,
832 .ndo_uninit = ieee80211_teardown_sdata,
833 .ndo_start_xmit = ieee80211_monitor_start_xmit,
834 .ndo_set_rx_mode = ieee80211_set_multicast_list,
835 .ndo_change_mtu = ieee80211_change_mtu,
836 .ndo_set_mac_address = eth_mac_addr,
837 .ndo_select_queue = ieee80211_monitor_select_queue,
838 };
839
840 static void ieee80211_if_setup(struct net_device *dev)
841 {
842 ether_setup(dev);
843 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
844 dev->netdev_ops = &ieee80211_dataif_ops;
845 dev->destructor = free_netdev;
846 }
847
848 static void ieee80211_iface_work(struct work_struct *work)
849 {
850 struct ieee80211_sub_if_data *sdata =
851 container_of(work, struct ieee80211_sub_if_data, work);
852 struct ieee80211_local *local = sdata->local;
853 struct sk_buff *skb;
854 struct sta_info *sta;
855 struct ieee80211_ra_tid *ra_tid;
856
857 if (!ieee80211_sdata_running(sdata))
858 return;
859
860 if (local->scanning)
861 return;
862
863 /*
864 * ieee80211_queue_work() should have picked up most cases,
865 * here we'll pick the rest.
866 */
867 if (WARN(local->suspended,
868 "interface work scheduled while going to suspend\n"))
869 return;
870
871 /* first process frames */
872 while ((skb = skb_dequeue(&sdata->skb_queue))) {
873 struct ieee80211_mgmt *mgmt = (void *)skb->data;
874
875 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
876 ra_tid = (void *)&skb->cb;
877 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
878 ra_tid->tid);
879 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
880 ra_tid = (void *)&skb->cb;
881 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
882 ra_tid->tid);
883 } else if (ieee80211_is_action(mgmt->frame_control) &&
884 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
885 int len = skb->len;
886
887 mutex_lock(&local->sta_mtx);
888 sta = sta_info_get_bss(sdata, mgmt->sa);
889 if (sta) {
890 switch (mgmt->u.action.u.addba_req.action_code) {
891 case WLAN_ACTION_ADDBA_REQ:
892 ieee80211_process_addba_request(
893 local, sta, mgmt, len);
894 break;
895 case WLAN_ACTION_ADDBA_RESP:
896 ieee80211_process_addba_resp(local, sta,
897 mgmt, len);
898 break;
899 case WLAN_ACTION_DELBA:
900 ieee80211_process_delba(sdata, sta,
901 mgmt, len);
902 break;
903 default:
904 WARN_ON(1);
905 break;
906 }
907 }
908 mutex_unlock(&local->sta_mtx);
909 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
910 struct ieee80211_hdr *hdr = (void *)mgmt;
911 /*
912 * So the frame isn't mgmt, but frame_control
913 * is at the right place anyway, of course, so
914 * the if statement is correct.
915 *
916 * Warn if we have other data frame types here,
917 * they must not get here.
918 */
919 WARN_ON(hdr->frame_control &
920 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
921 WARN_ON(!(hdr->seq_ctrl &
922 cpu_to_le16(IEEE80211_SCTL_FRAG)));
923 /*
924 * This was a fragment of a frame, received while
925 * a block-ack session was active. That cannot be
926 * right, so terminate the session.
927 */
928 mutex_lock(&local->sta_mtx);
929 sta = sta_info_get_bss(sdata, mgmt->sa);
930 if (sta) {
931 u16 tid = *ieee80211_get_qos_ctl(hdr) &
932 IEEE80211_QOS_CTL_TID_MASK;
933
934 __ieee80211_stop_rx_ba_session(
935 sta, tid, WLAN_BACK_RECIPIENT,
936 WLAN_REASON_QSTA_REQUIRE_SETUP,
937 true);
938 }
939 mutex_unlock(&local->sta_mtx);
940 } else switch (sdata->vif.type) {
941 case NL80211_IFTYPE_STATION:
942 ieee80211_sta_rx_queued_mgmt(sdata, skb);
943 break;
944 case NL80211_IFTYPE_ADHOC:
945 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
946 break;
947 case NL80211_IFTYPE_MESH_POINT:
948 if (!ieee80211_vif_is_mesh(&sdata->vif))
949 break;
950 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
951 break;
952 default:
953 WARN(1, "frame for unexpected interface type");
954 break;
955 }
956
957 kfree_skb(skb);
958 }
959
960 /* then other type-dependent work */
961 switch (sdata->vif.type) {
962 case NL80211_IFTYPE_STATION:
963 ieee80211_sta_work(sdata);
964 break;
965 case NL80211_IFTYPE_ADHOC:
966 ieee80211_ibss_work(sdata);
967 break;
968 case NL80211_IFTYPE_MESH_POINT:
969 if (!ieee80211_vif_is_mesh(&sdata->vif))
970 break;
971 ieee80211_mesh_work(sdata);
972 break;
973 default:
974 break;
975 }
976 }
977
978
979 /*
980 * Helper function to initialise an interface to a specific type.
981 */
982 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
983 enum nl80211_iftype type)
984 {
985 /* clear type-dependent union */
986 memset(&sdata->u, 0, sizeof(sdata->u));
987
988 /* and set some type-dependent values */
989 sdata->vif.type = type;
990 sdata->vif.p2p = false;
991 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
992 sdata->wdev.iftype = type;
993
994 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
995 sdata->control_port_no_encrypt = false;
996
997 sdata->noack_map = 0;
998
999 /* only monitor differs */
1000 sdata->dev->type = ARPHRD_ETHER;
1001
1002 skb_queue_head_init(&sdata->skb_queue);
1003 INIT_WORK(&sdata->work, ieee80211_iface_work);
1004
1005 switch (type) {
1006 case NL80211_IFTYPE_P2P_GO:
1007 type = NL80211_IFTYPE_AP;
1008 sdata->vif.type = type;
1009 sdata->vif.p2p = true;
1010 /* fall through */
1011 case NL80211_IFTYPE_AP:
1012 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
1013 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1014 break;
1015 case NL80211_IFTYPE_P2P_CLIENT:
1016 type = NL80211_IFTYPE_STATION;
1017 sdata->vif.type = type;
1018 sdata->vif.p2p = true;
1019 /* fall through */
1020 case NL80211_IFTYPE_STATION:
1021 ieee80211_sta_setup_sdata(sdata);
1022 break;
1023 case NL80211_IFTYPE_ADHOC:
1024 ieee80211_ibss_setup_sdata(sdata);
1025 break;
1026 case NL80211_IFTYPE_MESH_POINT:
1027 if (ieee80211_vif_is_mesh(&sdata->vif))
1028 ieee80211_mesh_init_sdata(sdata);
1029 break;
1030 case NL80211_IFTYPE_MONITOR:
1031 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1032 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1033 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1034 MONITOR_FLAG_OTHER_BSS;
1035 break;
1036 case NL80211_IFTYPE_WDS:
1037 case NL80211_IFTYPE_AP_VLAN:
1038 break;
1039 case NL80211_IFTYPE_UNSPECIFIED:
1040 case NUM_NL80211_IFTYPES:
1041 BUG();
1042 break;
1043 }
1044
1045 ieee80211_debugfs_add_netdev(sdata);
1046 }
1047
1048 static void ieee80211_clean_sdata(struct ieee80211_sub_if_data *sdata)
1049 {
1050 switch (sdata->vif.type) {
1051 case NL80211_IFTYPE_MESH_POINT:
1052 mesh_path_flush_by_iface(sdata);
1053 break;
1054
1055 default:
1056 break;
1057 }
1058 }
1059
1060 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1061 enum nl80211_iftype type)
1062 {
1063 struct ieee80211_local *local = sdata->local;
1064 int ret, err;
1065 enum nl80211_iftype internal_type = type;
1066 bool p2p = false;
1067
1068 ASSERT_RTNL();
1069
1070 if (!local->ops->change_interface)
1071 return -EBUSY;
1072
1073 switch (sdata->vif.type) {
1074 case NL80211_IFTYPE_AP:
1075 case NL80211_IFTYPE_STATION:
1076 case NL80211_IFTYPE_ADHOC:
1077 /*
1078 * Could maybe also all others here?
1079 * Just not sure how that interacts
1080 * with the RX/config path e.g. for
1081 * mesh.
1082 */
1083 break;
1084 default:
1085 return -EBUSY;
1086 }
1087
1088 switch (type) {
1089 case NL80211_IFTYPE_AP:
1090 case NL80211_IFTYPE_STATION:
1091 case NL80211_IFTYPE_ADHOC:
1092 /*
1093 * Could probably support everything
1094 * but WDS here (WDS do_open can fail
1095 * under memory pressure, which this
1096 * code isn't prepared to handle).
1097 */
1098 break;
1099 case NL80211_IFTYPE_P2P_CLIENT:
1100 p2p = true;
1101 internal_type = NL80211_IFTYPE_STATION;
1102 break;
1103 case NL80211_IFTYPE_P2P_GO:
1104 p2p = true;
1105 internal_type = NL80211_IFTYPE_AP;
1106 break;
1107 default:
1108 return -EBUSY;
1109 }
1110
1111 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1112 if (ret)
1113 return ret;
1114
1115 ieee80211_do_stop(sdata, false);
1116
1117 ieee80211_teardown_sdata(sdata->dev);
1118
1119 ret = drv_change_interface(local, sdata, internal_type, p2p);
1120 if (ret)
1121 type = sdata->vif.type;
1122
1123 /*
1124 * Ignore return value here, there's not much we can do since
1125 * the driver changed the interface type internally already.
1126 * The warnings will hopefully make driver authors fix it :-)
1127 */
1128 ieee80211_check_queues(sdata);
1129
1130 ieee80211_setup_sdata(sdata, type);
1131
1132 err = ieee80211_do_open(sdata->dev, false);
1133 WARN(err, "type change: do_open returned %d", err);
1134
1135 return ret;
1136 }
1137
1138 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1139 enum nl80211_iftype type)
1140 {
1141 int ret;
1142
1143 ASSERT_RTNL();
1144
1145 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1146 return 0;
1147
1148 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1149 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
1150 type == NL80211_IFTYPE_ADHOC)
1151 return -EOPNOTSUPP;
1152
1153 if (ieee80211_sdata_running(sdata)) {
1154 ret = ieee80211_runtime_change_iftype(sdata, type);
1155 if (ret)
1156 return ret;
1157 } else {
1158 /* Purge and reset type-dependent state. */
1159 ieee80211_teardown_sdata(sdata->dev);
1160 ieee80211_setup_sdata(sdata, type);
1161 }
1162
1163 /* reset some values that shouldn't be kept across type changes */
1164 sdata->vif.bss_conf.basic_rates =
1165 ieee80211_mandatory_rates(sdata->local,
1166 sdata->local->hw.conf.channel->band);
1167 sdata->drop_unencrypted = 0;
1168 if (type == NL80211_IFTYPE_STATION)
1169 sdata->u.mgd.use_4addr = false;
1170
1171 return 0;
1172 }
1173
1174 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1175 struct net_device *dev,
1176 enum nl80211_iftype type)
1177 {
1178 struct ieee80211_sub_if_data *sdata;
1179 u64 mask, start, addr, val, inc;
1180 u8 *m;
1181 u8 tmp_addr[ETH_ALEN];
1182 int i;
1183
1184 /* default ... something at least */
1185 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1186
1187 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1188 local->hw.wiphy->n_addresses <= 1)
1189 return;
1190
1191
1192 mutex_lock(&local->iflist_mtx);
1193
1194 switch (type) {
1195 case NL80211_IFTYPE_MONITOR:
1196 /* doesn't matter */
1197 break;
1198 case NL80211_IFTYPE_WDS:
1199 case NL80211_IFTYPE_AP_VLAN:
1200 /* match up with an AP interface */
1201 list_for_each_entry(sdata, &local->interfaces, list) {
1202 if (sdata->vif.type != NL80211_IFTYPE_AP)
1203 continue;
1204 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1205 break;
1206 }
1207 /* keep default if no AP interface present */
1208 break;
1209 default:
1210 /* assign a new address if possible -- try n_addresses first */
1211 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1212 bool used = false;
1213
1214 list_for_each_entry(sdata, &local->interfaces, list) {
1215 if (memcmp(local->hw.wiphy->addresses[i].addr,
1216 sdata->vif.addr, ETH_ALEN) == 0) {
1217 used = true;
1218 break;
1219 }
1220 }
1221
1222 if (!used) {
1223 memcpy(dev->perm_addr,
1224 local->hw.wiphy->addresses[i].addr,
1225 ETH_ALEN);
1226 break;
1227 }
1228 }
1229
1230 /* try mask if available */
1231 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1232 break;
1233
1234 m = local->hw.wiphy->addr_mask;
1235 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1236 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1237 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1238
1239 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1240 /* not a contiguous mask ... not handled now! */
1241 printk(KERN_DEBUG "not contiguous\n");
1242 break;
1243 }
1244
1245 m = local->hw.wiphy->perm_addr;
1246 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1247 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1248 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1249
1250 inc = 1ULL<<__ffs64(mask);
1251 val = (start & mask);
1252 addr = (start & ~mask) | (val & mask);
1253 do {
1254 bool used = false;
1255
1256 tmp_addr[5] = addr >> 0*8;
1257 tmp_addr[4] = addr >> 1*8;
1258 tmp_addr[3] = addr >> 2*8;
1259 tmp_addr[2] = addr >> 3*8;
1260 tmp_addr[1] = addr >> 4*8;
1261 tmp_addr[0] = addr >> 5*8;
1262
1263 val += inc;
1264
1265 list_for_each_entry(sdata, &local->interfaces, list) {
1266 if (memcmp(tmp_addr, sdata->vif.addr,
1267 ETH_ALEN) == 0) {
1268 used = true;
1269 break;
1270 }
1271 }
1272
1273 if (!used) {
1274 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1275 break;
1276 }
1277 addr = (start & ~mask) | (val & mask);
1278 } while (addr != start);
1279
1280 break;
1281 }
1282
1283 mutex_unlock(&local->iflist_mtx);
1284 }
1285
1286 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1287 struct net_device **new_dev, enum nl80211_iftype type,
1288 struct vif_params *params)
1289 {
1290 struct net_device *ndev;
1291 struct ieee80211_sub_if_data *sdata = NULL;
1292 int ret, i;
1293 int txqs = 1;
1294
1295 ASSERT_RTNL();
1296
1297 if (local->hw.queues >= IEEE80211_NUM_ACS)
1298 txqs = IEEE80211_NUM_ACS;
1299
1300 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1301 name, ieee80211_if_setup, txqs, 1);
1302 if (!ndev)
1303 return -ENOMEM;
1304 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1305
1306 ndev->needed_headroom = local->tx_headroom +
1307 4*6 /* four MAC addresses */
1308 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1309 + 6 /* mesh */
1310 + 8 /* rfc1042/bridge tunnel */
1311 - ETH_HLEN /* ethernet hard_header_len */
1312 + IEEE80211_ENCRYPT_HEADROOM;
1313 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1314
1315 ret = dev_alloc_name(ndev, ndev->name);
1316 if (ret < 0)
1317 goto fail;
1318
1319 ieee80211_assign_perm_addr(local, ndev, type);
1320 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1321 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1322
1323 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1324 sdata = netdev_priv(ndev);
1325 ndev->ieee80211_ptr = &sdata->wdev;
1326 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1327 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1328
1329 /* initialise type-independent data */
1330 sdata->wdev.wiphy = local->hw.wiphy;
1331 sdata->local = local;
1332 sdata->dev = ndev;
1333 #ifdef CONFIG_INET
1334 sdata->arp_filter_state = true;
1335 #endif
1336
1337 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1338 skb_queue_head_init(&sdata->fragments[i].skb_list);
1339
1340 INIT_LIST_HEAD(&sdata->key_list);
1341
1342 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1343 struct ieee80211_supported_band *sband;
1344 sband = local->hw.wiphy->bands[i];
1345 sdata->rc_rateidx_mask[i] =
1346 sband ? (1 << sband->n_bitrates) - 1 : 0;
1347 if (sband)
1348 memcpy(sdata->rc_rateidx_mcs_mask[i],
1349 sband->ht_cap.mcs.rx_mask,
1350 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1351 else
1352 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1353 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1354 }
1355
1356 ieee80211_set_default_queues(sdata);
1357
1358 /* setup type-dependent data */
1359 ieee80211_setup_sdata(sdata, type);
1360
1361 if (params) {
1362 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1363 if (type == NL80211_IFTYPE_STATION)
1364 sdata->u.mgd.use_4addr = params->use_4addr;
1365 }
1366
1367 ret = register_netdevice(ndev);
1368 if (ret)
1369 goto fail;
1370
1371 mutex_lock(&local->iflist_mtx);
1372 list_add_tail_rcu(&sdata->list, &local->interfaces);
1373 mutex_unlock(&local->iflist_mtx);
1374
1375 if (new_dev)
1376 *new_dev = ndev;
1377
1378 return 0;
1379
1380 fail:
1381 free_netdev(ndev);
1382 return ret;
1383 }
1384
1385 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1386 {
1387 ASSERT_RTNL();
1388
1389 mutex_lock(&sdata->local->iflist_mtx);
1390 list_del_rcu(&sdata->list);
1391 mutex_unlock(&sdata->local->iflist_mtx);
1392
1393 /* clean up type-dependent data */
1394 ieee80211_clean_sdata(sdata);
1395
1396 synchronize_rcu();
1397 unregister_netdevice(sdata->dev);
1398 }
1399
1400 /*
1401 * Remove all interfaces, may only be called at hardware unregistration
1402 * time because it doesn't do RCU-safe list removals.
1403 */
1404 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1405 {
1406 struct ieee80211_sub_if_data *sdata, *tmp;
1407 LIST_HEAD(unreg_list);
1408
1409 ASSERT_RTNL();
1410
1411 mutex_lock(&local->iflist_mtx);
1412 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1413 list_del(&sdata->list);
1414
1415 ieee80211_clean_sdata(sdata);
1416
1417 unregister_netdevice_queue(sdata->dev, &unreg_list);
1418 }
1419 mutex_unlock(&local->iflist_mtx);
1420 unregister_netdevice_many(&unreg_list);
1421 list_del(&unreg_list);
1422 }
1423
1424 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1425 const char *reason)
1426 {
1427 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1428 return 0;
1429
1430 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1431 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1432 #endif
1433
1434 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1435 return IEEE80211_CONF_CHANGE_IDLE;
1436 }
1437
1438 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1439 {
1440 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1441 return 0;
1442
1443 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1444 wiphy_debug(local->hw.wiphy, "device now idle\n");
1445 #endif
1446
1447 drv_flush(local, false);
1448
1449 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1450 return IEEE80211_CONF_CHANGE_IDLE;
1451 }
1452
1453 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1454 {
1455 struct ieee80211_sub_if_data *sdata;
1456 int count = 0;
1457 bool working = false, scanning = false, hw_roc = false;
1458 struct ieee80211_work *wk;
1459 unsigned int led_trig_start = 0, led_trig_stop = 0;
1460
1461 #ifdef CONFIG_PROVE_LOCKING
1462 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1463 !lockdep_is_held(&local->iflist_mtx));
1464 #endif
1465 lockdep_assert_held(&local->mtx);
1466
1467 list_for_each_entry(sdata, &local->interfaces, list) {
1468 if (!ieee80211_sdata_running(sdata)) {
1469 sdata->vif.bss_conf.idle = true;
1470 continue;
1471 }
1472
1473 sdata->old_idle = sdata->vif.bss_conf.idle;
1474
1475 /* do not count disabled managed interfaces */
1476 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1477 !sdata->u.mgd.associated &&
1478 !sdata->u.mgd.auth_data &&
1479 !sdata->u.mgd.assoc_data) {
1480 sdata->vif.bss_conf.idle = true;
1481 continue;
1482 }
1483 /* do not count unused IBSS interfaces */
1484 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1485 !sdata->u.ibss.ssid_len) {
1486 sdata->vif.bss_conf.idle = true;
1487 continue;
1488 }
1489 /* count everything else */
1490 sdata->vif.bss_conf.idle = false;
1491 count++;
1492 }
1493
1494 list_for_each_entry(wk, &local->work_list, list) {
1495 working = true;
1496 wk->sdata->vif.bss_conf.idle = false;
1497 }
1498
1499 if (local->scan_sdata &&
1500 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
1501 scanning = true;
1502 local->scan_sdata->vif.bss_conf.idle = false;
1503 }
1504
1505 if (local->hw_roc_channel)
1506 hw_roc = true;
1507
1508 list_for_each_entry(sdata, &local->interfaces, list) {
1509 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1510 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1511 continue;
1512 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1513 continue;
1514 if (!ieee80211_sdata_running(sdata))
1515 continue;
1516 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1517 }
1518
1519 if (working || scanning || hw_roc)
1520 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1521 else
1522 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1523
1524 if (count)
1525 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1526 else
1527 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1528
1529 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1530
1531 if (hw_roc)
1532 return ieee80211_idle_off(local, "hw remain-on-channel");
1533 if (working)
1534 return ieee80211_idle_off(local, "working");
1535 if (scanning)
1536 return ieee80211_idle_off(local, "scanning");
1537 if (!count)
1538 return ieee80211_idle_on(local);
1539 else
1540 return ieee80211_idle_off(local, "in use");
1541
1542 return 0;
1543 }
1544
1545 void ieee80211_recalc_idle(struct ieee80211_local *local)
1546 {
1547 u32 chg;
1548
1549 mutex_lock(&local->iflist_mtx);
1550 chg = __ieee80211_recalc_idle(local);
1551 mutex_unlock(&local->iflist_mtx);
1552 if (chg)
1553 ieee80211_hw_config(local, chg);
1554 }
1555
1556 static int netdev_notify(struct notifier_block *nb,
1557 unsigned long state,
1558 void *ndev)
1559 {
1560 struct net_device *dev = ndev;
1561 struct ieee80211_sub_if_data *sdata;
1562
1563 if (state != NETDEV_CHANGENAME)
1564 return 0;
1565
1566 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1567 return 0;
1568
1569 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1570 return 0;
1571
1572 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1573
1574 memcpy(sdata->name, dev->name, IFNAMSIZ);
1575
1576 ieee80211_debugfs_rename_netdev(sdata);
1577 return 0;
1578 }
1579
1580 static struct notifier_block mac80211_netdev_notifier = {
1581 .notifier_call = netdev_notify,
1582 };
1583
1584 int ieee80211_iface_init(void)
1585 {
1586 return register_netdevice_notifier(&mac80211_netdev_notifier);
1587 }
1588
1589 void ieee80211_iface_exit(void)
1590 {
1591 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1592 }
Linux kernel - Deliverables
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