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mac80211: check IEEE80211_HW_QUEUE_CONTROL in ieee80211_check_queues()
[linux-2.6.git] / net / mac80211 / iface.c
blob23d1da376eb39f108296be63cd93de7b16d509fa
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 (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
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
210 sdata->vif.hw_queue[i] = i;
211 }
212 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
213 }
214
215 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
216 {
217 struct ieee80211_sub_if_data *sdata;
218 int ret;
219
220 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
221 return 0;
222
223 if (local->monitor_sdata)
224 return 0;
225
226 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
227 if (!sdata)
228 return -ENOMEM;
229
230 /* set up data */
231 sdata->local = local;
232 sdata->vif.type = NL80211_IFTYPE_MONITOR;
233 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
234 wiphy_name(local->hw.wiphy));
235
236 ieee80211_set_default_queues(sdata);
237
238 ret = drv_add_interface(local, sdata);
239 if (WARN_ON(ret)) {
240 /* ok .. stupid driver, it asked for this! */
241 kfree(sdata);
242 return ret;
243 }
244
245 ret = ieee80211_check_queues(sdata);
246 if (ret) {
247 kfree(sdata);
248 return ret;
249 }
250
251 rcu_assign_pointer(local->monitor_sdata, sdata);
252
253 return 0;
254 }
255
256 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
257 {
258 struct ieee80211_sub_if_data *sdata;
259
260 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
261 return;
262
263 sdata = rtnl_dereference(local->monitor_sdata);
264
265 if (!sdata)
266 return;
267
268 rcu_assign_pointer(local->monitor_sdata, NULL);
269 synchronize_net();
270
271 drv_remove_interface(local, sdata);
272
273 kfree(sdata);
274 }
275
276 /*
277 * NOTE: Be very careful when changing this function, it must NOT return
278 * an error on interface type changes that have been pre-checked, so most
279 * checks should be in ieee80211_check_concurrent_iface.
280 */
281 static int ieee80211_do_open(struct net_device *dev, bool coming_up)
282 {
283 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
284 struct ieee80211_local *local = sdata->local;
285 struct sta_info *sta;
286 u32 changed = 0;
287 int res;
288 u32 hw_reconf_flags = 0;
289
290 switch (sdata->vif.type) {
291 case NL80211_IFTYPE_WDS:
292 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
293 return -ENOLINK;
294 break;
295 case NL80211_IFTYPE_AP_VLAN: {
296 struct ieee80211_sub_if_data *master;
297
298 if (!sdata->bss)
299 return -ENOLINK;
300
301 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
302
303 master = container_of(sdata->bss,
304 struct ieee80211_sub_if_data, u.ap);
305 sdata->control_port_protocol =
306 master->control_port_protocol;
307 sdata->control_port_no_encrypt =
308 master->control_port_no_encrypt;
309 break;
310 }
311 case NL80211_IFTYPE_AP:
312 sdata->bss = &sdata->u.ap;
313 break;
314 case NL80211_IFTYPE_MESH_POINT:
315 case NL80211_IFTYPE_STATION:
316 case NL80211_IFTYPE_MONITOR:
317 case NL80211_IFTYPE_ADHOC:
318 /* no special treatment */
319 break;
320 case NL80211_IFTYPE_UNSPECIFIED:
321 case NUM_NL80211_IFTYPES:
322 case NL80211_IFTYPE_P2P_CLIENT:
323 case NL80211_IFTYPE_P2P_GO:
324 /* cannot happen */
325 WARN_ON(1);
326 break;
327 }
328
329 if (local->open_count == 0) {
330 res = drv_start(local);
331 if (res)
332 goto err_del_bss;
333 if (local->ops->napi_poll)
334 napi_enable(&local->napi);
335 /* we're brought up, everything changes */
336 hw_reconf_flags = ~0;
337 ieee80211_led_radio(local, true);
338 ieee80211_mod_tpt_led_trig(local,
339 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
340 }
341
342 /*
343 * Copy the hopefully now-present MAC address to
344 * this interface, if it has the special null one.
345 */
346 if (is_zero_ether_addr(dev->dev_addr)) {
347 memcpy(dev->dev_addr,
348 local->hw.wiphy->perm_addr,
349 ETH_ALEN);
350 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
351
352 if (!is_valid_ether_addr(dev->dev_addr)) {
353 res = -EADDRNOTAVAIL;
354 goto err_stop;
355 }
356 }
357
358 switch (sdata->vif.type) {
359 case NL80211_IFTYPE_AP_VLAN:
360 /* no need to tell driver, but set carrier */
361 if (rtnl_dereference(sdata->bss->beacon))
362 netif_carrier_on(dev);
363 else
364 netif_carrier_off(dev);
365 break;
366 case NL80211_IFTYPE_MONITOR:
367 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
368 local->cooked_mntrs++;
369 break;
370 }
371
372 if (local->monitors == 0 && local->open_count == 0) {
373 res = ieee80211_add_virtual_monitor(local);
374 if (res)
375 goto err_stop;
376 }
377
378 /* must be before the call to ieee80211_configure_filter */
379 local->monitors++;
380 if (local->monitors == 1) {
381 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
382 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
383 }
384
385 ieee80211_adjust_monitor_flags(sdata, 1);
386 ieee80211_configure_filter(local);
387
388 netif_carrier_on(dev);
389 break;
390 default:
391 if (coming_up) {
392 ieee80211_del_virtual_monitor(local);
393
394 res = drv_add_interface(local, sdata);
395 if (res)
396 goto err_stop;
397 res = ieee80211_check_queues(sdata);
398 if (res)
399 goto err_del_interface;
400 }
401
402 if (sdata->vif.type == NL80211_IFTYPE_AP) {
403 local->fif_pspoll++;
404 local->fif_probe_req++;
405
406 ieee80211_configure_filter(local);
407 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
408 local->fif_probe_req++;
409 }
410
411 changed |= ieee80211_reset_erp_info(sdata);
412 ieee80211_bss_info_change_notify(sdata, changed);
413
414 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
415 sdata->vif.type == NL80211_IFTYPE_ADHOC ||
416 sdata->vif.type == NL80211_IFTYPE_AP)
417 netif_carrier_off(dev);
418 else
419 netif_carrier_on(dev);
420
421 /*
422 * set default queue parameters so drivers don't
423 * need to initialise the hardware if the hardware
424 * doesn't start up with sane defaults
425 */
426 ieee80211_set_wmm_default(sdata, true);
427 }
428
429 set_bit(SDATA_STATE_RUNNING, &sdata->state);
430
431 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
432 /* Create STA entry for the WDS peer */
433 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
434 GFP_KERNEL);
435 if (!sta) {
436 res = -ENOMEM;
437 goto err_del_interface;
438 }
439
440 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
441 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
442 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
443
444 res = sta_info_insert(sta);
445 if (res) {
446 /* STA has been freed */
447 goto err_del_interface;
448 }
449
450 rate_control_rate_init(sta);
451 }
452
453 /*
454 * set_multicast_list will be invoked by the networking core
455 * which will check whether any increments here were done in
456 * error and sync them down to the hardware as filter flags.
457 */
458 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
459 atomic_inc(&local->iff_allmultis);
460
461 if (sdata->flags & IEEE80211_SDATA_PROMISC)
462 atomic_inc(&local->iff_promiscs);
463
464 mutex_lock(&local->mtx);
465 hw_reconf_flags |= __ieee80211_recalc_idle(local);
466 mutex_unlock(&local->mtx);
467
468 if (coming_up)
469 local->open_count++;
470
471 if (hw_reconf_flags)
472 ieee80211_hw_config(local, hw_reconf_flags);
473
474 ieee80211_recalc_ps(local, -1);
475
476 netif_tx_start_all_queues(dev);
477
478 return 0;
479 err_del_interface:
480 drv_remove_interface(local, sdata);
481 err_stop:
482 if (!local->open_count)
483 drv_stop(local);
484 err_del_bss:
485 sdata->bss = NULL;
486 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
487 list_del(&sdata->u.vlan.list);
488 /* might already be clear but that doesn't matter */
489 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
490 return res;
491 }
492
493 static int ieee80211_open(struct net_device *dev)
494 {
495 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
496 int err;
497
498 /* fail early if user set an invalid address */
499 if (!is_valid_ether_addr(dev->dev_addr))
500 return -EADDRNOTAVAIL;
501
502 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
503 if (err)
504 return err;
505
506 return ieee80211_do_open(dev, true);
507 }
508
509 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
510 bool going_down)
511 {
512 struct ieee80211_local *local = sdata->local;
513 unsigned long flags;
514 struct sk_buff *skb, *tmp;
515 u32 hw_reconf_flags = 0;
516 int i;
517 enum nl80211_channel_type orig_ct;
518
519 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
520
521 if (local->scan_sdata == sdata)
522 ieee80211_scan_cancel(local);
523
524 /*
525 * Stop TX on this interface first.
526 */
527 netif_tx_stop_all_queues(sdata->dev);
528
529 /*
530 * Purge work for this interface.
531 */
532 ieee80211_work_purge(sdata);
533
534 /*
535 * Remove all stations associated with this interface.
536 *
537 * This must be done before calling ops->remove_interface()
538 * because otherwise we can later invoke ops->sta_notify()
539 * whenever the STAs are removed, and that invalidates driver
540 * assumptions about always getting a vif pointer that is valid
541 * (because if we remove a STA after ops->remove_interface()
542 * the driver will have removed the vif info already!)
543 *
544 * This is relevant only in AP, WDS and mesh modes, since in
545 * all other modes we've already removed all stations when
546 * disconnecting etc.
547 */
548 sta_info_flush(local, sdata);
549
550 /*
551 * Don't count this interface for promisc/allmulti while it
552 * is down. dev_mc_unsync() will invoke set_multicast_list
553 * on the master interface which will sync these down to the
554 * hardware as filter flags.
555 */
556 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
557 atomic_dec(&local->iff_allmultis);
558
559 if (sdata->flags & IEEE80211_SDATA_PROMISC)
560 atomic_dec(&local->iff_promiscs);
561
562 if (sdata->vif.type == NL80211_IFTYPE_AP) {
563 local->fif_pspoll--;
564 local->fif_probe_req--;
565 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
566 local->fif_probe_req--;
567 }
568
569 netif_addr_lock_bh(sdata->dev);
570 spin_lock_bh(&local->filter_lock);
571 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
572 sdata->dev->addr_len);
573 spin_unlock_bh(&local->filter_lock);
574 netif_addr_unlock_bh(sdata->dev);
575
576 ieee80211_configure_filter(local);
577
578 del_timer_sync(&local->dynamic_ps_timer);
579 cancel_work_sync(&local->dynamic_ps_enable_work);
580
581 /* APs need special treatment */
582 if (sdata->vif.type == NL80211_IFTYPE_AP) {
583 struct ieee80211_sub_if_data *vlan, *tmpsdata;
584 struct beacon_data *old_beacon =
585 rtnl_dereference(sdata->u.ap.beacon);
586 struct sk_buff *old_probe_resp =
587 rtnl_dereference(sdata->u.ap.probe_resp);
588
589 /* sdata_running will return false, so this will disable */
590 ieee80211_bss_info_change_notify(sdata,
591 BSS_CHANGED_BEACON_ENABLED);
592
593 /* remove beacon and probe response */
594 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
595 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
596 synchronize_rcu();
597 kfree(old_beacon);
598 kfree_skb(old_probe_resp);
599
600 /* down all dependent devices, that is VLANs */
601 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
602 u.vlan.list)
603 dev_close(vlan->dev);
604 WARN_ON(!list_empty(&sdata->u.ap.vlans));
605
606 /* free all potentially still buffered bcast frames */
607 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
608 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
609 }
610
611 if (going_down)
612 local->open_count--;
613
614 switch (sdata->vif.type) {
615 case NL80211_IFTYPE_AP_VLAN:
616 list_del(&sdata->u.vlan.list);
617 /* no need to tell driver */
618 break;
619 case NL80211_IFTYPE_MONITOR:
620 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
621 local->cooked_mntrs--;
622 break;
623 }
624
625 local->monitors--;
626 if (local->monitors == 0) {
627 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
628 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
629 ieee80211_del_virtual_monitor(local);
630 }
631
632 ieee80211_adjust_monitor_flags(sdata, -1);
633 ieee80211_configure_filter(local);
634 break;
635 default:
636 flush_work(&sdata->work);
637 /*
638 * When we get here, the interface is marked down.
639 * Call synchronize_rcu() to wait for the RX path
640 * should it be using the interface and enqueuing
641 * frames at this very time on another CPU.
642 */
643 synchronize_rcu();
644 skb_queue_purge(&sdata->skb_queue);
645
646 /*
647 * Disable beaconing here for mesh only, AP and IBSS
648 * are already taken care of.
649 */
650 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
651 ieee80211_bss_info_change_notify(sdata,
652 BSS_CHANGED_BEACON_ENABLED);
653
654 /*
655 * Free all remaining keys, there shouldn't be any,
656 * except maybe group keys in AP more or WDS?
657 */
658 ieee80211_free_keys(sdata);
659
660 if (going_down)
661 drv_remove_interface(local, sdata);
662 }
663
664 sdata->bss = NULL;
665
666 mutex_lock(&local->mtx);
667 hw_reconf_flags |= __ieee80211_recalc_idle(local);
668 mutex_unlock(&local->mtx);
669
670 ieee80211_recalc_ps(local, -1);
671
672 if (local->open_count == 0) {
673 if (local->ops->napi_poll)
674 napi_disable(&local->napi);
675 ieee80211_clear_tx_pending(local);
676 ieee80211_stop_device(local);
677
678 /* no reconfiguring after stop! */
679 hw_reconf_flags = 0;
680 }
681
682 /* Re-calculate channel-type, in case there are multiple vifs
683 * on different channel types.
684 */
685 orig_ct = local->_oper_channel_type;
686 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
687
688 /* do after stop to avoid reconfiguring when we stop anyway */
689 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
690 ieee80211_hw_config(local, hw_reconf_flags);
691
692 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
693 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
694 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
695 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
696 if (info->control.vif == &sdata->vif) {
697 __skb_unlink(skb, &local->pending[i]);
698 dev_kfree_skb_irq(skb);
699 }
700 }
701 }
702 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
703
704 if (local->monitors == local->open_count && local->monitors > 0)
705 ieee80211_add_virtual_monitor(local);
706 }
707
708 static int ieee80211_stop(struct net_device *dev)
709 {
710 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
711
712 ieee80211_do_stop(sdata, true);
713
714 return 0;
715 }
716
717 static void ieee80211_set_multicast_list(struct net_device *dev)
718 {
719 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
720 struct ieee80211_local *local = sdata->local;
721 int allmulti, promisc, sdata_allmulti, sdata_promisc;
722
723 allmulti = !!(dev->flags & IFF_ALLMULTI);
724 promisc = !!(dev->flags & IFF_PROMISC);
725 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
726 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
727
728 if (allmulti != sdata_allmulti) {
729 if (dev->flags & IFF_ALLMULTI)
730 atomic_inc(&local->iff_allmultis);
731 else
732 atomic_dec(&local->iff_allmultis);
733 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
734 }
735
736 if (promisc != sdata_promisc) {
737 if (dev->flags & IFF_PROMISC)
738 atomic_inc(&local->iff_promiscs);
739 else
740 atomic_dec(&local->iff_promiscs);
741 sdata->flags ^= IEEE80211_SDATA_PROMISC;
742 }
743 spin_lock_bh(&local->filter_lock);
744 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
745 spin_unlock_bh(&local->filter_lock);
746 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
747 }
748
749 /*
750 * Called when the netdev is removed or, by the code below, before
751 * the interface type changes.
752 */
753 static void ieee80211_teardown_sdata(struct net_device *dev)
754 {
755 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
756 struct ieee80211_local *local = sdata->local;
757 int flushed;
758 int i;
759
760 /* free extra data */
761 ieee80211_free_keys(sdata);
762
763 ieee80211_debugfs_remove_netdev(sdata);
764
765 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
766 __skb_queue_purge(&sdata->fragments[i].skb_list);
767 sdata->fragment_next = 0;
768
769 if (ieee80211_vif_is_mesh(&sdata->vif))
770 mesh_rmc_free(sdata);
771 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
772 ieee80211_mgd_teardown(sdata);
773
774 flushed = sta_info_flush(local, sdata);
775 WARN_ON(flushed);
776 }
777
778 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
779 struct sk_buff *skb)
780 {
781 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
782 }
783
784 static const struct net_device_ops ieee80211_dataif_ops = {
785 .ndo_open = ieee80211_open,
786 .ndo_stop = ieee80211_stop,
787 .ndo_uninit = ieee80211_teardown_sdata,
788 .ndo_start_xmit = ieee80211_subif_start_xmit,
789 .ndo_set_rx_mode = ieee80211_set_multicast_list,
790 .ndo_change_mtu = ieee80211_change_mtu,
791 .ndo_set_mac_address = ieee80211_change_mac,
792 .ndo_select_queue = ieee80211_netdev_select_queue,
793 };
794
795 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
796 struct sk_buff *skb)
797 {
798 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
799 struct ieee80211_local *local = sdata->local;
800 struct ieee80211_hdr *hdr;
801 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
802
803 if (local->hw.queues < IEEE80211_NUM_ACS)
804 return 0;
805
806 if (skb->len < 4 ||
807 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
808 return 0; /* doesn't matter, frame will be dropped */
809
810 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
811
812 return ieee80211_select_queue_80211(local, skb, hdr);
813 }
814
815 static const struct net_device_ops ieee80211_monitorif_ops = {
816 .ndo_open = ieee80211_open,
817 .ndo_stop = ieee80211_stop,
818 .ndo_uninit = ieee80211_teardown_sdata,
819 .ndo_start_xmit = ieee80211_monitor_start_xmit,
820 .ndo_set_rx_mode = ieee80211_set_multicast_list,
821 .ndo_change_mtu = ieee80211_change_mtu,
822 .ndo_set_mac_address = eth_mac_addr,
823 .ndo_select_queue = ieee80211_monitor_select_queue,
824 };
825
826 static void ieee80211_if_setup(struct net_device *dev)
827 {
828 ether_setup(dev);
829 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
830 dev->netdev_ops = &ieee80211_dataif_ops;
831 dev->destructor = free_netdev;
832 }
833
834 static void ieee80211_iface_work(struct work_struct *work)
835 {
836 struct ieee80211_sub_if_data *sdata =
837 container_of(work, struct ieee80211_sub_if_data, work);
838 struct ieee80211_local *local = sdata->local;
839 struct sk_buff *skb;
840 struct sta_info *sta;
841 struct ieee80211_ra_tid *ra_tid;
842
843 if (!ieee80211_sdata_running(sdata))
844 return;
845
846 if (local->scanning)
847 return;
848
849 /*
850 * ieee80211_queue_work() should have picked up most cases,
851 * here we'll pick the rest.
852 */
853 if (WARN(local->suspended,
854 "interface work scheduled while going to suspend\n"))
855 return;
856
857 /* first process frames */
858 while ((skb = skb_dequeue(&sdata->skb_queue))) {
859 struct ieee80211_mgmt *mgmt = (void *)skb->data;
860
861 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
862 ra_tid = (void *)&skb->cb;
863 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
864 ra_tid->tid);
865 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
866 ra_tid = (void *)&skb->cb;
867 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
868 ra_tid->tid);
869 } else if (ieee80211_is_action(mgmt->frame_control) &&
870 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
871 int len = skb->len;
872
873 mutex_lock(&local->sta_mtx);
874 sta = sta_info_get_bss(sdata, mgmt->sa);
875 if (sta) {
876 switch (mgmt->u.action.u.addba_req.action_code) {
877 case WLAN_ACTION_ADDBA_REQ:
878 ieee80211_process_addba_request(
879 local, sta, mgmt, len);
880 break;
881 case WLAN_ACTION_ADDBA_RESP:
882 ieee80211_process_addba_resp(local, sta,
883 mgmt, len);
884 break;
885 case WLAN_ACTION_DELBA:
886 ieee80211_process_delba(sdata, sta,
887 mgmt, len);
888 break;
889 default:
890 WARN_ON(1);
891 break;
892 }
893 }
894 mutex_unlock(&local->sta_mtx);
895 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
896 struct ieee80211_hdr *hdr = (void *)mgmt;
897 /*
898 * So the frame isn't mgmt, but frame_control
899 * is at the right place anyway, of course, so
900 * the if statement is correct.
901 *
902 * Warn if we have other data frame types here,
903 * they must not get here.
904 */
905 WARN_ON(hdr->frame_control &
906 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
907 WARN_ON(!(hdr->seq_ctrl &
908 cpu_to_le16(IEEE80211_SCTL_FRAG)));
909 /*
910 * This was a fragment of a frame, received while
911 * a block-ack session was active. That cannot be
912 * right, so terminate the session.
913 */
914 mutex_lock(&local->sta_mtx);
915 sta = sta_info_get_bss(sdata, mgmt->sa);
916 if (sta) {
917 u16 tid = *ieee80211_get_qos_ctl(hdr) &
918 IEEE80211_QOS_CTL_TID_MASK;
919
920 __ieee80211_stop_rx_ba_session(
921 sta, tid, WLAN_BACK_RECIPIENT,
922 WLAN_REASON_QSTA_REQUIRE_SETUP,
923 true);
924 }
925 mutex_unlock(&local->sta_mtx);
926 } else switch (sdata->vif.type) {
927 case NL80211_IFTYPE_STATION:
928 ieee80211_sta_rx_queued_mgmt(sdata, skb);
929 break;
930 case NL80211_IFTYPE_ADHOC:
931 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
932 break;
933 case NL80211_IFTYPE_MESH_POINT:
934 if (!ieee80211_vif_is_mesh(&sdata->vif))
935 break;
936 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
937 break;
938 default:
939 WARN(1, "frame for unexpected interface type");
940 break;
941 }
942
943 kfree_skb(skb);
944 }
945
946 /* then other type-dependent work */
947 switch (sdata->vif.type) {
948 case NL80211_IFTYPE_STATION:
949 ieee80211_sta_work(sdata);
950 break;
951 case NL80211_IFTYPE_ADHOC:
952 ieee80211_ibss_work(sdata);
953 break;
954 case NL80211_IFTYPE_MESH_POINT:
955 if (!ieee80211_vif_is_mesh(&sdata->vif))
956 break;
957 ieee80211_mesh_work(sdata);
958 break;
959 default:
960 break;
961 }
962 }
963
964
965 /*
966 * Helper function to initialise an interface to a specific type.
967 */
968 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
969 enum nl80211_iftype type)
970 {
971 /* clear type-dependent union */
972 memset(&sdata->u, 0, sizeof(sdata->u));
973
974 /* and set some type-dependent values */
975 sdata->vif.type = type;
976 sdata->vif.p2p = false;
977 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
978 sdata->wdev.iftype = type;
979
980 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
981 sdata->control_port_no_encrypt = false;
982
983 sdata->noack_map = 0;
984
985 /* only monitor differs */
986 sdata->dev->type = ARPHRD_ETHER;
987
988 skb_queue_head_init(&sdata->skb_queue);
989 INIT_WORK(&sdata->work, ieee80211_iface_work);
990
991 switch (type) {
992 case NL80211_IFTYPE_P2P_GO:
993 type = NL80211_IFTYPE_AP;
994 sdata->vif.type = type;
995 sdata->vif.p2p = true;
996 /* fall through */
997 case NL80211_IFTYPE_AP:
998 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
999 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1000 break;
1001 case NL80211_IFTYPE_P2P_CLIENT:
1002 type = NL80211_IFTYPE_STATION;
1003 sdata->vif.type = type;
1004 sdata->vif.p2p = true;
1005 /* fall through */
1006 case NL80211_IFTYPE_STATION:
1007 ieee80211_sta_setup_sdata(sdata);
1008 break;
1009 case NL80211_IFTYPE_ADHOC:
1010 ieee80211_ibss_setup_sdata(sdata);
1011 break;
1012 case NL80211_IFTYPE_MESH_POINT:
1013 if (ieee80211_vif_is_mesh(&sdata->vif))
1014 ieee80211_mesh_init_sdata(sdata);
1015 break;
1016 case NL80211_IFTYPE_MONITOR:
1017 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1018 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1019 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1020 MONITOR_FLAG_OTHER_BSS;
1021 break;
1022 case NL80211_IFTYPE_WDS:
1023 case NL80211_IFTYPE_AP_VLAN:
1024 break;
1025 case NL80211_IFTYPE_UNSPECIFIED:
1026 case NUM_NL80211_IFTYPES:
1027 BUG();
1028 break;
1029 }
1030
1031 ieee80211_debugfs_add_netdev(sdata);
1032 }
1033
1034 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1035 enum nl80211_iftype type)
1036 {
1037 struct ieee80211_local *local = sdata->local;
1038 int ret, err;
1039 enum nl80211_iftype internal_type = type;
1040 bool p2p = false;
1041
1042 ASSERT_RTNL();
1043
1044 if (!local->ops->change_interface)
1045 return -EBUSY;
1046
1047 switch (sdata->vif.type) {
1048 case NL80211_IFTYPE_AP:
1049 case NL80211_IFTYPE_STATION:
1050 case NL80211_IFTYPE_ADHOC:
1051 /*
1052 * Could maybe also all others here?
1053 * Just not sure how that interacts
1054 * with the RX/config path e.g. for
1055 * mesh.
1056 */
1057 break;
1058 default:
1059 return -EBUSY;
1060 }
1061
1062 switch (type) {
1063 case NL80211_IFTYPE_AP:
1064 case NL80211_IFTYPE_STATION:
1065 case NL80211_IFTYPE_ADHOC:
1066 /*
1067 * Could probably support everything
1068 * but WDS here (WDS do_open can fail
1069 * under memory pressure, which this
1070 * code isn't prepared to handle).
1071 */
1072 break;
1073 case NL80211_IFTYPE_P2P_CLIENT:
1074 p2p = true;
1075 internal_type = NL80211_IFTYPE_STATION;
1076 break;
1077 case NL80211_IFTYPE_P2P_GO:
1078 p2p = true;
1079 internal_type = NL80211_IFTYPE_AP;
1080 break;
1081 default:
1082 return -EBUSY;
1083 }
1084
1085 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1086 if (ret)
1087 return ret;
1088
1089 ieee80211_do_stop(sdata, false);
1090
1091 ieee80211_teardown_sdata(sdata->dev);
1092
1093 ret = drv_change_interface(local, sdata, internal_type, p2p);
1094 if (ret)
1095 type = sdata->vif.type;
1096
1097 /*
1098 * Ignore return value here, there's not much we can do since
1099 * the driver changed the interface type internally already.
1100 * The warnings will hopefully make driver authors fix it :-)
1101 */
1102 ieee80211_check_queues(sdata);
1103
1104 ieee80211_setup_sdata(sdata, type);
1105
1106 err = ieee80211_do_open(sdata->dev, false);
1107 WARN(err, "type change: do_open returned %d", err);
1108
1109 return ret;
1110 }
1111
1112 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1113 enum nl80211_iftype type)
1114 {
1115 int ret;
1116
1117 ASSERT_RTNL();
1118
1119 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1120 return 0;
1121
1122 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1123 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
1124 type == NL80211_IFTYPE_ADHOC)
1125 return -EOPNOTSUPP;
1126
1127 if (ieee80211_sdata_running(sdata)) {
1128 ret = ieee80211_runtime_change_iftype(sdata, type);
1129 if (ret)
1130 return ret;
1131 } else {
1132 /* Purge and reset type-dependent state. */
1133 ieee80211_teardown_sdata(sdata->dev);
1134 ieee80211_setup_sdata(sdata, type);
1135 }
1136
1137 /* reset some values that shouldn't be kept across type changes */
1138 sdata->vif.bss_conf.basic_rates =
1139 ieee80211_mandatory_rates(sdata->local,
1140 sdata->local->hw.conf.channel->band);
1141 sdata->drop_unencrypted = 0;
1142 if (type == NL80211_IFTYPE_STATION)
1143 sdata->u.mgd.use_4addr = false;
1144
1145 return 0;
1146 }
1147
1148 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1149 struct net_device *dev,
1150 enum nl80211_iftype type)
1151 {
1152 struct ieee80211_sub_if_data *sdata;
1153 u64 mask, start, addr, val, inc;
1154 u8 *m;
1155 u8 tmp_addr[ETH_ALEN];
1156 int i;
1157
1158 /* default ... something at least */
1159 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1160
1161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1162 local->hw.wiphy->n_addresses <= 1)
1163 return;
1164
1165
1166 mutex_lock(&local->iflist_mtx);
1167
1168 switch (type) {
1169 case NL80211_IFTYPE_MONITOR:
1170 /* doesn't matter */
1171 break;
1172 case NL80211_IFTYPE_WDS:
1173 case NL80211_IFTYPE_AP_VLAN:
1174 /* match up with an AP interface */
1175 list_for_each_entry(sdata, &local->interfaces, list) {
1176 if (sdata->vif.type != NL80211_IFTYPE_AP)
1177 continue;
1178 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1179 break;
1180 }
1181 /* keep default if no AP interface present */
1182 break;
1183 default:
1184 /* assign a new address if possible -- try n_addresses first */
1185 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1186 bool used = false;
1187
1188 list_for_each_entry(sdata, &local->interfaces, list) {
1189 if (memcmp(local->hw.wiphy->addresses[i].addr,
1190 sdata->vif.addr, ETH_ALEN) == 0) {
1191 used = true;
1192 break;
1193 }
1194 }
1195
1196 if (!used) {
1197 memcpy(dev->perm_addr,
1198 local->hw.wiphy->addresses[i].addr,
1199 ETH_ALEN);
1200 break;
1201 }
1202 }
1203
1204 /* try mask if available */
1205 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1206 break;
1207
1208 m = local->hw.wiphy->addr_mask;
1209 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1210 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1211 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1212
1213 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1214 /* not a contiguous mask ... not handled now! */
1215 printk(KERN_DEBUG "not contiguous\n");
1216 break;
1217 }
1218
1219 m = local->hw.wiphy->perm_addr;
1220 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1221 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1222 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1223
1224 inc = 1ULL<<__ffs64(mask);
1225 val = (start & mask);
1226 addr = (start & ~mask) | (val & mask);
1227 do {
1228 bool used = false;
1229
1230 tmp_addr[5] = addr >> 0*8;
1231 tmp_addr[4] = addr >> 1*8;
1232 tmp_addr[3] = addr >> 2*8;
1233 tmp_addr[2] = addr >> 3*8;
1234 tmp_addr[1] = addr >> 4*8;
1235 tmp_addr[0] = addr >> 5*8;
1236
1237 val += inc;
1238
1239 list_for_each_entry(sdata, &local->interfaces, list) {
1240 if (memcmp(tmp_addr, sdata->vif.addr,
1241 ETH_ALEN) == 0) {
1242 used = true;
1243 break;
1244 }
1245 }
1246
1247 if (!used) {
1248 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1249 break;
1250 }
1251 addr = (start & ~mask) | (val & mask);
1252 } while (addr != start);
1253
1254 break;
1255 }
1256
1257 mutex_unlock(&local->iflist_mtx);
1258 }
1259
1260 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1261 struct net_device **new_dev, enum nl80211_iftype type,
1262 struct vif_params *params)
1263 {
1264 struct net_device *ndev;
1265 struct ieee80211_sub_if_data *sdata = NULL;
1266 int ret, i;
1267 int txqs = 1;
1268
1269 ASSERT_RTNL();
1270
1271 if (local->hw.queues >= IEEE80211_NUM_ACS)
1272 txqs = IEEE80211_NUM_ACS;
1273
1274 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1275 name, ieee80211_if_setup, txqs, 1);
1276 if (!ndev)
1277 return -ENOMEM;
1278 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1279
1280 ndev->needed_headroom = local->tx_headroom +
1281 4*6 /* four MAC addresses */
1282 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1283 + 6 /* mesh */
1284 + 8 /* rfc1042/bridge tunnel */
1285 - ETH_HLEN /* ethernet hard_header_len */
1286 + IEEE80211_ENCRYPT_HEADROOM;
1287 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1288
1289 ret = dev_alloc_name(ndev, ndev->name);
1290 if (ret < 0)
1291 goto fail;
1292
1293 ieee80211_assign_perm_addr(local, ndev, type);
1294 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1295 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1296
1297 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1298 sdata = netdev_priv(ndev);
1299 ndev->ieee80211_ptr = &sdata->wdev;
1300 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1301 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1302
1303 /* initialise type-independent data */
1304 sdata->wdev.wiphy = local->hw.wiphy;
1305 sdata->local = local;
1306 sdata->dev = ndev;
1307 #ifdef CONFIG_INET
1308 sdata->arp_filter_state = true;
1309 #endif
1310
1311 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1312 skb_queue_head_init(&sdata->fragments[i].skb_list);
1313
1314 INIT_LIST_HEAD(&sdata->key_list);
1315
1316 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1317 struct ieee80211_supported_band *sband;
1318 sband = local->hw.wiphy->bands[i];
1319 sdata->rc_rateidx_mask[i] =
1320 sband ? (1 << sband->n_bitrates) - 1 : 0;
1321 if (sband)
1322 memcpy(sdata->rc_rateidx_mcs_mask[i],
1323 sband->ht_cap.mcs.rx_mask,
1324 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1325 else
1326 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1327 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1328 }
1329
1330 ieee80211_set_default_queues(sdata);
1331
1332 /* setup type-dependent data */
1333 ieee80211_setup_sdata(sdata, type);
1334
1335 if (params) {
1336 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1337 if (type == NL80211_IFTYPE_STATION)
1338 sdata->u.mgd.use_4addr = params->use_4addr;
1339 }
1340
1341 ret = register_netdevice(ndev);
1342 if (ret)
1343 goto fail;
1344
1345 mutex_lock(&local->iflist_mtx);
1346 list_add_tail_rcu(&sdata->list, &local->interfaces);
1347 mutex_unlock(&local->iflist_mtx);
1348
1349 if (new_dev)
1350 *new_dev = ndev;
1351
1352 return 0;
1353
1354 fail:
1355 free_netdev(ndev);
1356 return ret;
1357 }
1358
1359 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1360 {
1361 ASSERT_RTNL();
1362
1363 mutex_lock(&sdata->local->iflist_mtx);
1364 list_del_rcu(&sdata->list);
1365 mutex_unlock(&sdata->local->iflist_mtx);
1366
1367 if (ieee80211_vif_is_mesh(&sdata->vif))
1368 mesh_path_flush_by_iface(sdata);
1369
1370 synchronize_rcu();
1371 unregister_netdevice(sdata->dev);
1372 }
1373
1374 /*
1375 * Remove all interfaces, may only be called at hardware unregistration
1376 * time because it doesn't do RCU-safe list removals.
1377 */
1378 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1379 {
1380 struct ieee80211_sub_if_data *sdata, *tmp;
1381 LIST_HEAD(unreg_list);
1382
1383 ASSERT_RTNL();
1384
1385 mutex_lock(&local->iflist_mtx);
1386 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1387 list_del(&sdata->list);
1388
1389 if (ieee80211_vif_is_mesh(&sdata->vif))
1390 mesh_path_flush_by_iface(sdata);
1391
1392 unregister_netdevice_queue(sdata->dev, &unreg_list);
1393 }
1394 mutex_unlock(&local->iflist_mtx);
1395 unregister_netdevice_many(&unreg_list);
1396 list_del(&unreg_list);
1397 }
1398
1399 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1400 const char *reason)
1401 {
1402 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1403 return 0;
1404
1405 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1406 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1407 #endif
1408
1409 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1410 return IEEE80211_CONF_CHANGE_IDLE;
1411 }
1412
1413 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1414 {
1415 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1416 return 0;
1417
1418 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1419 wiphy_debug(local->hw.wiphy, "device now idle\n");
1420 #endif
1421
1422 drv_flush(local, false);
1423
1424 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1425 return IEEE80211_CONF_CHANGE_IDLE;
1426 }
1427
1428 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1429 {
1430 struct ieee80211_sub_if_data *sdata;
1431 int count = 0;
1432 bool working = false, scanning = false, hw_roc = false;
1433 struct ieee80211_work *wk;
1434 unsigned int led_trig_start = 0, led_trig_stop = 0;
1435
1436 #ifdef CONFIG_PROVE_LOCKING
1437 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1438 !lockdep_is_held(&local->iflist_mtx));
1439 #endif
1440 lockdep_assert_held(&local->mtx);
1441
1442 list_for_each_entry(sdata, &local->interfaces, list) {
1443 if (!ieee80211_sdata_running(sdata)) {
1444 sdata->vif.bss_conf.idle = true;
1445 continue;
1446 }
1447
1448 sdata->old_idle = sdata->vif.bss_conf.idle;
1449
1450 /* do not count disabled managed interfaces */
1451 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1452 !sdata->u.mgd.associated &&
1453 !sdata->u.mgd.auth_data &&
1454 !sdata->u.mgd.assoc_data) {
1455 sdata->vif.bss_conf.idle = true;
1456 continue;
1457 }
1458 /* do not count unused IBSS interfaces */
1459 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1460 !sdata->u.ibss.ssid_len) {
1461 sdata->vif.bss_conf.idle = true;
1462 continue;
1463 }
1464 /* count everything else */
1465 sdata->vif.bss_conf.idle = false;
1466 count++;
1467 }
1468
1469 list_for_each_entry(wk, &local->work_list, list) {
1470 working = true;
1471 wk->sdata->vif.bss_conf.idle = false;
1472 }
1473
1474 if (local->scan_sdata &&
1475 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
1476 scanning = true;
1477 local->scan_sdata->vif.bss_conf.idle = false;
1478 }
1479
1480 if (local->hw_roc_channel)
1481 hw_roc = true;
1482
1483 list_for_each_entry(sdata, &local->interfaces, list) {
1484 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1485 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1486 continue;
1487 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1488 continue;
1489 if (!ieee80211_sdata_running(sdata))
1490 continue;
1491 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1492 }
1493
1494 if (working || scanning || hw_roc)
1495 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1496 else
1497 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1498
1499 if (count)
1500 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1501 else
1502 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1503
1504 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1505
1506 if (hw_roc)
1507 return ieee80211_idle_off(local, "hw remain-on-channel");
1508 if (working)
1509 return ieee80211_idle_off(local, "working");
1510 if (scanning)
1511 return ieee80211_idle_off(local, "scanning");
1512 if (!count)
1513 return ieee80211_idle_on(local);
1514 else
1515 return ieee80211_idle_off(local, "in use");
1516
1517 return 0;
1518 }
1519
1520 void ieee80211_recalc_idle(struct ieee80211_local *local)
1521 {
1522 u32 chg;
1523
1524 mutex_lock(&local->iflist_mtx);
1525 chg = __ieee80211_recalc_idle(local);
1526 mutex_unlock(&local->iflist_mtx);
1527 if (chg)
1528 ieee80211_hw_config(local, chg);
1529 }
1530
1531 static int netdev_notify(struct notifier_block *nb,
1532 unsigned long state,
1533 void *ndev)
1534 {
1535 struct net_device *dev = ndev;
1536 struct ieee80211_sub_if_data *sdata;
1537
1538 if (state != NETDEV_CHANGENAME)
1539 return 0;
1540
1541 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1542 return 0;
1543
1544 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1545 return 0;
1546
1547 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1548
1549 memcpy(sdata->name, dev->name, IFNAMSIZ);
1550
1551 ieee80211_debugfs_rename_netdev(sdata);
1552 return 0;
1553 }
1554
1555 static struct notifier_block mac80211_netdev_notifier = {
1556 .notifier_call = netdev_notify,
1557 };
1558
1559 int ieee80211_iface_init(void)
1560 {
1561 return register_netdevice_notifier(&mac80211_netdev_notifier);
1562 }
1563
1564 void ieee80211_iface_exit(void)
1565 {
1566 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1567 }
Linus' kernel tree