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cfg80211: use wdev in mgmt-tx/ROC APIs
[mirror_ubuntu-artful-kernel.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 u32 ieee80211_idle_off(struct ieee80211_local *local,
47 const char *reason)
48 {
49 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
50 return 0;
51
52 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
53 return IEEE80211_CONF_CHANGE_IDLE;
54 }
55
56 static u32 ieee80211_idle_on(struct ieee80211_local *local)
57 {
58 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
59 return 0;
60
61 drv_flush(local, false);
62
63 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
64 return IEEE80211_CONF_CHANGE_IDLE;
65 }
66
67 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
68 {
69 struct ieee80211_sub_if_data *sdata;
70 int count = 0;
71 bool working = false, scanning = false;
72 unsigned int led_trig_start = 0, led_trig_stop = 0;
73 struct ieee80211_roc_work *roc;
74
75 #ifdef CONFIG_PROVE_LOCKING
76 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
77 !lockdep_is_held(&local->iflist_mtx));
78 #endif
79 lockdep_assert_held(&local->mtx);
80
81 list_for_each_entry(sdata, &local->interfaces, list) {
82 if (!ieee80211_sdata_running(sdata)) {
83 sdata->vif.bss_conf.idle = true;
84 continue;
85 }
86
87 sdata->old_idle = sdata->vif.bss_conf.idle;
88
89 /* do not count disabled managed interfaces */
90 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
91 !sdata->u.mgd.associated &&
92 !sdata->u.mgd.auth_data &&
93 !sdata->u.mgd.assoc_data) {
94 sdata->vif.bss_conf.idle = true;
95 continue;
96 }
97 /* do not count unused IBSS interfaces */
98 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
99 !sdata->u.ibss.ssid_len) {
100 sdata->vif.bss_conf.idle = true;
101 continue;
102 }
103 /* count everything else */
104 sdata->vif.bss_conf.idle = false;
105 count++;
106 }
107
108 if (!local->ops->remain_on_channel) {
109 list_for_each_entry(roc, &local->roc_list, list) {
110 working = true;
111 roc->sdata->vif.bss_conf.idle = false;
112 }
113 }
114
115 if (local->scan_sdata &&
116 !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
117 scanning = true;
118 local->scan_sdata->vif.bss_conf.idle = false;
119 }
120
121 list_for_each_entry(sdata, &local->interfaces, list) {
122 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
123 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
124 continue;
125 if (sdata->old_idle == sdata->vif.bss_conf.idle)
126 continue;
127 if (!ieee80211_sdata_running(sdata))
128 continue;
129 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
130 }
131
132 if (working || scanning)
133 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
134 else
135 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
136
137 if (count)
138 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
139 else
140 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
141
142 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
143
144 if (working)
145 return ieee80211_idle_off(local, "working");
146 if (scanning)
147 return ieee80211_idle_off(local, "scanning");
148 if (!count)
149 return ieee80211_idle_on(local);
150 else
151 return ieee80211_idle_off(local, "in use");
152
153 return 0;
154 }
155
156 void ieee80211_recalc_idle(struct ieee80211_local *local)
157 {
158 u32 chg;
159
160 mutex_lock(&local->iflist_mtx);
161 chg = __ieee80211_recalc_idle(local);
162 mutex_unlock(&local->iflist_mtx);
163 if (chg)
164 ieee80211_hw_config(local, chg);
165 }
166
167 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
168 {
169 int meshhdrlen;
170 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
171
172 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
173
174 /* FIX: what would be proper limits for MTU?
175 * This interface uses 802.3 frames. */
176 if (new_mtu < 256 ||
177 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
178 return -EINVAL;
179 }
180
181 dev->mtu = new_mtu;
182 return 0;
183 }
184
185 static int ieee80211_change_mac(struct net_device *dev, void *addr)
186 {
187 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
188 struct sockaddr *sa = addr;
189 int ret;
190
191 if (ieee80211_sdata_running(sdata))
192 return -EBUSY;
193
194 ret = eth_mac_addr(dev, sa);
195
196 if (ret == 0)
197 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
198
199 return ret;
200 }
201
202 static inline int identical_mac_addr_allowed(int type1, int type2)
203 {
204 return type1 == NL80211_IFTYPE_MONITOR ||
205 type2 == NL80211_IFTYPE_MONITOR ||
206 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
207 (type1 == NL80211_IFTYPE_WDS &&
208 (type2 == NL80211_IFTYPE_WDS ||
209 type2 == NL80211_IFTYPE_AP)) ||
210 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
211 (type1 == NL80211_IFTYPE_AP_VLAN &&
212 (type2 == NL80211_IFTYPE_AP ||
213 type2 == NL80211_IFTYPE_AP_VLAN));
214 }
215
216 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
217 enum nl80211_iftype iftype)
218 {
219 struct ieee80211_local *local = sdata->local;
220 struct ieee80211_sub_if_data *nsdata;
221
222 ASSERT_RTNL();
223
224 /* we hold the RTNL here so can safely walk the list */
225 list_for_each_entry(nsdata, &local->interfaces, list) {
226 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
227 /*
228 * Allow only a single IBSS interface to be up at any
229 * time. This is restricted because beacon distribution
230 * cannot work properly if both are in the same IBSS.
231 *
232 * To remove this restriction we'd have to disallow them
233 * from setting the same SSID on different IBSS interfaces
234 * belonging to the same hardware. Then, however, we're
235 * faced with having to adopt two different TSF timers...
236 */
237 if (iftype == NL80211_IFTYPE_ADHOC &&
238 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
239 return -EBUSY;
240
241 /*
242 * The remaining checks are only performed for interfaces
243 * with the same MAC address.
244 */
245 if (!ether_addr_equal(sdata->vif.addr,
246 nsdata->vif.addr))
247 continue;
248
249 /*
250 * check whether it may have the same address
251 */
252 if (!identical_mac_addr_allowed(iftype,
253 nsdata->vif.type))
254 return -ENOTUNIQ;
255
256 /*
257 * can only add VLANs to enabled APs
258 */
259 if (iftype == NL80211_IFTYPE_AP_VLAN &&
260 nsdata->vif.type == NL80211_IFTYPE_AP)
261 sdata->bss = &nsdata->u.ap;
262 }
263 }
264
265 return 0;
266 }
267
268 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
269 {
270 int n_queues = sdata->local->hw.queues;
271 int i;
272
273 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
274 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
275 IEEE80211_INVAL_HW_QUEUE))
276 return -EINVAL;
277 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
278 n_queues))
279 return -EINVAL;
280 }
281
282 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
283 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
284 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
285 return 0;
286 }
287
288 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
289 return -EINVAL;
290
291 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
292 return -EINVAL;
293
294 return 0;
295 }
296
297 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
298 const int offset)
299 {
300 struct ieee80211_local *local = sdata->local;
301 u32 flags = sdata->u.mntr_flags;
302
303 #define ADJUST(_f, _s) do { \
304 if (flags & MONITOR_FLAG_##_f) \
305 local->fif_##_s += offset; \
306 } while (0)
307
308 ADJUST(FCSFAIL, fcsfail);
309 ADJUST(PLCPFAIL, plcpfail);
310 ADJUST(CONTROL, control);
311 ADJUST(CONTROL, pspoll);
312 ADJUST(OTHER_BSS, other_bss);
313
314 #undef ADJUST
315 }
316
317 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
318 {
319 struct ieee80211_local *local = sdata->local;
320 int i;
321
322 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
323 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
324 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
325 else if (local->hw.queues >= IEEE80211_NUM_ACS)
326 sdata->vif.hw_queue[i] = i;
327 else
328 sdata->vif.hw_queue[i] = 0;
329 }
330 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
331 }
332
333 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
334 {
335 struct ieee80211_sub_if_data *sdata;
336 int ret;
337
338 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
339 return 0;
340
341 if (local->monitor_sdata)
342 return 0;
343
344 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
345 if (!sdata)
346 return -ENOMEM;
347
348 /* set up data */
349 sdata->local = local;
350 sdata->vif.type = NL80211_IFTYPE_MONITOR;
351 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
352 wiphy_name(local->hw.wiphy));
353
354 ieee80211_set_default_queues(sdata);
355
356 ret = drv_add_interface(local, sdata);
357 if (WARN_ON(ret)) {
358 /* ok .. stupid driver, it asked for this! */
359 kfree(sdata);
360 return ret;
361 }
362
363 ret = ieee80211_check_queues(sdata);
364 if (ret) {
365 kfree(sdata);
366 return ret;
367 }
368
369 rcu_assign_pointer(local->monitor_sdata, sdata);
370
371 return 0;
372 }
373
374 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
375 {
376 struct ieee80211_sub_if_data *sdata;
377
378 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
379 return;
380
381 sdata = rtnl_dereference(local->monitor_sdata);
382
383 if (!sdata)
384 return;
385
386 rcu_assign_pointer(local->monitor_sdata, NULL);
387 synchronize_net();
388
389 drv_remove_interface(local, sdata);
390
391 kfree(sdata);
392 }
393
394 /*
395 * NOTE: Be very careful when changing this function, it must NOT return
396 * an error on interface type changes that have been pre-checked, so most
397 * checks should be in ieee80211_check_concurrent_iface.
398 */
399 static int ieee80211_do_open(struct net_device *dev, bool coming_up)
400 {
401 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
402 struct ieee80211_local *local = sdata->local;
403 struct sta_info *sta;
404 u32 changed = 0;
405 int res;
406 u32 hw_reconf_flags = 0;
407
408 switch (sdata->vif.type) {
409 case NL80211_IFTYPE_WDS:
410 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
411 return -ENOLINK;
412 break;
413 case NL80211_IFTYPE_AP_VLAN: {
414 struct ieee80211_sub_if_data *master;
415
416 if (!sdata->bss)
417 return -ENOLINK;
418
419 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
420
421 master = container_of(sdata->bss,
422 struct ieee80211_sub_if_data, u.ap);
423 sdata->control_port_protocol =
424 master->control_port_protocol;
425 sdata->control_port_no_encrypt =
426 master->control_port_no_encrypt;
427 break;
428 }
429 case NL80211_IFTYPE_AP:
430 sdata->bss = &sdata->u.ap;
431 break;
432 case NL80211_IFTYPE_MESH_POINT:
433 case NL80211_IFTYPE_STATION:
434 case NL80211_IFTYPE_MONITOR:
435 case NL80211_IFTYPE_ADHOC:
436 /* no special treatment */
437 break;
438 case NL80211_IFTYPE_UNSPECIFIED:
439 case NUM_NL80211_IFTYPES:
440 case NL80211_IFTYPE_P2P_CLIENT:
441 case NL80211_IFTYPE_P2P_GO:
442 /* cannot happen */
443 WARN_ON(1);
444 break;
445 }
446
447 if (local->open_count == 0) {
448 res = drv_start(local);
449 if (res)
450 goto err_del_bss;
451 if (local->ops->napi_poll)
452 napi_enable(&local->napi);
453 /* we're brought up, everything changes */
454 hw_reconf_flags = ~0;
455 ieee80211_led_radio(local, true);
456 ieee80211_mod_tpt_led_trig(local,
457 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
458 }
459
460 /*
461 * Copy the hopefully now-present MAC address to
462 * this interface, if it has the special null one.
463 */
464 if (is_zero_ether_addr(dev->dev_addr)) {
465 memcpy(dev->dev_addr,
466 local->hw.wiphy->perm_addr,
467 ETH_ALEN);
468 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
469
470 if (!is_valid_ether_addr(dev->dev_addr)) {
471 res = -EADDRNOTAVAIL;
472 goto err_stop;
473 }
474 }
475
476 switch (sdata->vif.type) {
477 case NL80211_IFTYPE_AP_VLAN:
478 /* no need to tell driver, but set carrier */
479 if (rtnl_dereference(sdata->bss->beacon))
480 netif_carrier_on(dev);
481 else
482 netif_carrier_off(dev);
483 break;
484 case NL80211_IFTYPE_MONITOR:
485 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
486 local->cooked_mntrs++;
487 break;
488 }
489
490 /* must be before the call to ieee80211_configure_filter */
491 local->monitors++;
492 if (local->monitors == 1) {
493 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
494 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
495 }
496
497 ieee80211_adjust_monitor_flags(sdata, 1);
498 ieee80211_configure_filter(local);
499
500 netif_carrier_on(dev);
501 break;
502 default:
503 if (coming_up) {
504 res = drv_add_interface(local, sdata);
505 if (res)
506 goto err_stop;
507 res = ieee80211_check_queues(sdata);
508 if (res)
509 goto err_del_interface;
510 }
511
512 if (sdata->vif.type == NL80211_IFTYPE_AP) {
513 local->fif_pspoll++;
514 local->fif_probe_req++;
515
516 ieee80211_configure_filter(local);
517 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
518 local->fif_probe_req++;
519 }
520
521 changed |= ieee80211_reset_erp_info(sdata);
522 ieee80211_bss_info_change_notify(sdata, changed);
523
524 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
525 sdata->vif.type == NL80211_IFTYPE_ADHOC ||
526 sdata->vif.type == NL80211_IFTYPE_AP)
527 netif_carrier_off(dev);
528 else
529 netif_carrier_on(dev);
530
531 /*
532 * set default queue parameters so drivers don't
533 * need to initialise the hardware if the hardware
534 * doesn't start up with sane defaults
535 */
536 ieee80211_set_wmm_default(sdata, true);
537 }
538
539 set_bit(SDATA_STATE_RUNNING, &sdata->state);
540
541 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
542 /* Create STA entry for the WDS peer */
543 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
544 GFP_KERNEL);
545 if (!sta) {
546 res = -ENOMEM;
547 goto err_del_interface;
548 }
549
550 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
551 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
552 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
553
554 res = sta_info_insert(sta);
555 if (res) {
556 /* STA has been freed */
557 goto err_del_interface;
558 }
559
560 rate_control_rate_init(sta);
561 }
562
563 /*
564 * set_multicast_list will be invoked by the networking core
565 * which will check whether any increments here were done in
566 * error and sync them down to the hardware as filter flags.
567 */
568 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
569 atomic_inc(&local->iff_allmultis);
570
571 if (sdata->flags & IEEE80211_SDATA_PROMISC)
572 atomic_inc(&local->iff_promiscs);
573
574 mutex_lock(&local->mtx);
575 hw_reconf_flags |= __ieee80211_recalc_idle(local);
576 mutex_unlock(&local->mtx);
577
578 if (coming_up)
579 local->open_count++;
580
581 if (hw_reconf_flags)
582 ieee80211_hw_config(local, hw_reconf_flags);
583
584 ieee80211_recalc_ps(local, -1);
585
586 netif_tx_start_all_queues(dev);
587
588 return 0;
589 err_del_interface:
590 drv_remove_interface(local, sdata);
591 err_stop:
592 if (!local->open_count)
593 drv_stop(local);
594 err_del_bss:
595 sdata->bss = NULL;
596 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
597 list_del(&sdata->u.vlan.list);
598 /* might already be clear but that doesn't matter */
599 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
600 return res;
601 }
602
603 static int ieee80211_open(struct net_device *dev)
604 {
605 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
606 int err;
607
608 /* fail early if user set an invalid address */
609 if (!is_valid_ether_addr(dev->dev_addr))
610 return -EADDRNOTAVAIL;
611
612 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
613 if (err)
614 return err;
615
616 return ieee80211_do_open(dev, true);
617 }
618
619 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
620 bool going_down)
621 {
622 struct ieee80211_local *local = sdata->local;
623 unsigned long flags;
624 struct sk_buff *skb, *tmp;
625 u32 hw_reconf_flags = 0;
626 int i;
627 enum nl80211_channel_type orig_ct;
628
629 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
630
631 if (local->scan_sdata == sdata)
632 ieee80211_scan_cancel(local);
633
634 /*
635 * Stop TX on this interface first.
636 */
637 netif_tx_stop_all_queues(sdata->dev);
638
639 ieee80211_roc_purge(sdata);
640
641 /*
642 * Remove all stations associated with this interface.
643 *
644 * This must be done before calling ops->remove_interface()
645 * because otherwise we can later invoke ops->sta_notify()
646 * whenever the STAs are removed, and that invalidates driver
647 * assumptions about always getting a vif pointer that is valid
648 * (because if we remove a STA after ops->remove_interface()
649 * the driver will have removed the vif info already!)
650 *
651 * This is relevant only in AP, WDS and mesh modes, since in
652 * all other modes we've already removed all stations when
653 * disconnecting etc.
654 */
655 sta_info_flush(local, sdata);
656
657 /*
658 * Don't count this interface for promisc/allmulti while it
659 * is down. dev_mc_unsync() will invoke set_multicast_list
660 * on the master interface which will sync these down to the
661 * hardware as filter flags.
662 */
663 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
664 atomic_dec(&local->iff_allmultis);
665
666 if (sdata->flags & IEEE80211_SDATA_PROMISC)
667 atomic_dec(&local->iff_promiscs);
668
669 if (sdata->vif.type == NL80211_IFTYPE_AP) {
670 local->fif_pspoll--;
671 local->fif_probe_req--;
672 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
673 local->fif_probe_req--;
674 }
675
676 netif_addr_lock_bh(sdata->dev);
677 spin_lock_bh(&local->filter_lock);
678 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
679 sdata->dev->addr_len);
680 spin_unlock_bh(&local->filter_lock);
681 netif_addr_unlock_bh(sdata->dev);
682
683 ieee80211_configure_filter(local);
684
685 del_timer_sync(&local->dynamic_ps_timer);
686 cancel_work_sync(&local->dynamic_ps_enable_work);
687
688 /* APs need special treatment */
689 if (sdata->vif.type == NL80211_IFTYPE_AP) {
690 struct ieee80211_sub_if_data *vlan, *tmpsdata;
691 struct beacon_data *old_beacon =
692 rtnl_dereference(sdata->u.ap.beacon);
693 struct sk_buff *old_probe_resp =
694 rtnl_dereference(sdata->u.ap.probe_resp);
695
696 /* sdata_running will return false, so this will disable */
697 ieee80211_bss_info_change_notify(sdata,
698 BSS_CHANGED_BEACON_ENABLED);
699
700 /* remove beacon and probe response */
701 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
702 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
703 synchronize_rcu();
704 kfree(old_beacon);
705 kfree_skb(old_probe_resp);
706
707 /* down all dependent devices, that is VLANs */
708 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
709 u.vlan.list)
710 dev_close(vlan->dev);
711 WARN_ON(!list_empty(&sdata->u.ap.vlans));
712
713 /* free all potentially still buffered bcast frames */
714 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
715 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
716 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
717 ieee80211_mgd_stop(sdata);
718 }
719
720 if (going_down)
721 local->open_count--;
722
723 switch (sdata->vif.type) {
724 case NL80211_IFTYPE_AP_VLAN:
725 list_del(&sdata->u.vlan.list);
726 /* no need to tell driver */
727 break;
728 case NL80211_IFTYPE_MONITOR:
729 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
730 local->cooked_mntrs--;
731 break;
732 }
733
734 local->monitors--;
735 if (local->monitors == 0) {
736 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
737 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
738 }
739
740 ieee80211_adjust_monitor_flags(sdata, -1);
741 ieee80211_configure_filter(local);
742 break;
743 default:
744 flush_work(&sdata->work);
745 /*
746 * When we get here, the interface is marked down.
747 * Call synchronize_rcu() to wait for the RX path
748 * should it be using the interface and enqueuing
749 * frames at this very time on another CPU.
750 */
751 synchronize_rcu();
752 skb_queue_purge(&sdata->skb_queue);
753
754 /*
755 * Disable beaconing here for mesh only, AP and IBSS
756 * are already taken care of.
757 */
758 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
759 ieee80211_bss_info_change_notify(sdata,
760 BSS_CHANGED_BEACON_ENABLED);
761
762 /*
763 * Free all remaining keys, there shouldn't be any,
764 * except maybe group keys in AP more or WDS?
765 */
766 ieee80211_free_keys(sdata);
767
768 if (going_down)
769 drv_remove_interface(local, sdata);
770 }
771
772 sdata->bss = NULL;
773
774 mutex_lock(&local->mtx);
775 hw_reconf_flags |= __ieee80211_recalc_idle(local);
776 mutex_unlock(&local->mtx);
777
778 ieee80211_recalc_ps(local, -1);
779
780 if (local->open_count == 0) {
781 if (local->ops->napi_poll)
782 napi_disable(&local->napi);
783 ieee80211_clear_tx_pending(local);
784 ieee80211_stop_device(local);
785
786 /* no reconfiguring after stop! */
787 hw_reconf_flags = 0;
788 }
789
790 /* Re-calculate channel-type, in case there are multiple vifs
791 * on different channel types.
792 */
793 orig_ct = local->_oper_channel_type;
794 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
795
796 /* do after stop to avoid reconfiguring when we stop anyway */
797 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
798 ieee80211_hw_config(local, hw_reconf_flags);
799
800 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
801 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
802 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
803 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
804 if (info->control.vif == &sdata->vif) {
805 __skb_unlink(skb, &local->pending[i]);
806 dev_kfree_skb_irq(skb);
807 }
808 }
809 }
810 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
811 }
812
813 static int ieee80211_stop(struct net_device *dev)
814 {
815 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
816
817 ieee80211_do_stop(sdata, true);
818
819 return 0;
820 }
821
822 static void ieee80211_set_multicast_list(struct net_device *dev)
823 {
824 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
825 struct ieee80211_local *local = sdata->local;
826 int allmulti, promisc, sdata_allmulti, sdata_promisc;
827
828 allmulti = !!(dev->flags & IFF_ALLMULTI);
829 promisc = !!(dev->flags & IFF_PROMISC);
830 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
831 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
832
833 if (allmulti != sdata_allmulti) {
834 if (dev->flags & IFF_ALLMULTI)
835 atomic_inc(&local->iff_allmultis);
836 else
837 atomic_dec(&local->iff_allmultis);
838 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
839 }
840
841 if (promisc != sdata_promisc) {
842 if (dev->flags & IFF_PROMISC)
843 atomic_inc(&local->iff_promiscs);
844 else
845 atomic_dec(&local->iff_promiscs);
846 sdata->flags ^= IEEE80211_SDATA_PROMISC;
847 }
848 spin_lock_bh(&local->filter_lock);
849 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
850 spin_unlock_bh(&local->filter_lock);
851 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
852 }
853
854 /*
855 * Called when the netdev is removed or, by the code below, before
856 * the interface type changes.
857 */
858 static void ieee80211_teardown_sdata(struct net_device *dev)
859 {
860 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
861 struct ieee80211_local *local = sdata->local;
862 int flushed;
863 int i;
864
865 /* free extra data */
866 ieee80211_free_keys(sdata);
867
868 ieee80211_debugfs_remove_netdev(sdata);
869
870 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
871 __skb_queue_purge(&sdata->fragments[i].skb_list);
872 sdata->fragment_next = 0;
873
874 if (ieee80211_vif_is_mesh(&sdata->vif))
875 mesh_rmc_free(sdata);
876
877 flushed = sta_info_flush(local, sdata);
878 WARN_ON(flushed);
879 }
880
881 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
882 struct sk_buff *skb)
883 {
884 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
885 }
886
887 static const struct net_device_ops ieee80211_dataif_ops = {
888 .ndo_open = ieee80211_open,
889 .ndo_stop = ieee80211_stop,
890 .ndo_uninit = ieee80211_teardown_sdata,
891 .ndo_start_xmit = ieee80211_subif_start_xmit,
892 .ndo_set_rx_mode = ieee80211_set_multicast_list,
893 .ndo_change_mtu = ieee80211_change_mtu,
894 .ndo_set_mac_address = ieee80211_change_mac,
895 .ndo_select_queue = ieee80211_netdev_select_queue,
896 };
897
898 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
899 struct sk_buff *skb)
900 {
901 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
902 struct ieee80211_local *local = sdata->local;
903 struct ieee80211_hdr *hdr;
904 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
905
906 if (local->hw.queues < IEEE80211_NUM_ACS)
907 return 0;
908
909 if (skb->len < 4 ||
910 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
911 return 0; /* doesn't matter, frame will be dropped */
912
913 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
914
915 return ieee80211_select_queue_80211(sdata, skb, hdr);
916 }
917
918 static const struct net_device_ops ieee80211_monitorif_ops = {
919 .ndo_open = ieee80211_open,
920 .ndo_stop = ieee80211_stop,
921 .ndo_uninit = ieee80211_teardown_sdata,
922 .ndo_start_xmit = ieee80211_monitor_start_xmit,
923 .ndo_set_rx_mode = ieee80211_set_multicast_list,
924 .ndo_change_mtu = ieee80211_change_mtu,
925 .ndo_set_mac_address = eth_mac_addr,
926 .ndo_select_queue = ieee80211_monitor_select_queue,
927 };
928
929 static void ieee80211_if_setup(struct net_device *dev)
930 {
931 ether_setup(dev);
932 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
933 dev->netdev_ops = &ieee80211_dataif_ops;
934 dev->destructor = free_netdev;
935 }
936
937 static void ieee80211_iface_work(struct work_struct *work)
938 {
939 struct ieee80211_sub_if_data *sdata =
940 container_of(work, struct ieee80211_sub_if_data, work);
941 struct ieee80211_local *local = sdata->local;
942 struct sk_buff *skb;
943 struct sta_info *sta;
944 struct ieee80211_ra_tid *ra_tid;
945
946 if (!ieee80211_sdata_running(sdata))
947 return;
948
949 if (local->scanning)
950 return;
951
952 /*
953 * ieee80211_queue_work() should have picked up most cases,
954 * here we'll pick the rest.
955 */
956 if (WARN(local->suspended,
957 "interface work scheduled while going to suspend\n"))
958 return;
959
960 /* first process frames */
961 while ((skb = skb_dequeue(&sdata->skb_queue))) {
962 struct ieee80211_mgmt *mgmt = (void *)skb->data;
963
964 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
965 ra_tid = (void *)&skb->cb;
966 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
967 ra_tid->tid);
968 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
969 ra_tid = (void *)&skb->cb;
970 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
971 ra_tid->tid);
972 } else if (ieee80211_is_action(mgmt->frame_control) &&
973 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
974 int len = skb->len;
975
976 mutex_lock(&local->sta_mtx);
977 sta = sta_info_get_bss(sdata, mgmt->sa);
978 if (sta) {
979 switch (mgmt->u.action.u.addba_req.action_code) {
980 case WLAN_ACTION_ADDBA_REQ:
981 ieee80211_process_addba_request(
982 local, sta, mgmt, len);
983 break;
984 case WLAN_ACTION_ADDBA_RESP:
985 ieee80211_process_addba_resp(local, sta,
986 mgmt, len);
987 break;
988 case WLAN_ACTION_DELBA:
989 ieee80211_process_delba(sdata, sta,
990 mgmt, len);
991 break;
992 default:
993 WARN_ON(1);
994 break;
995 }
996 }
997 mutex_unlock(&local->sta_mtx);
998 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
999 struct ieee80211_hdr *hdr = (void *)mgmt;
1000 /*
1001 * So the frame isn't mgmt, but frame_control
1002 * is at the right place anyway, of course, so
1003 * the if statement is correct.
1004 *
1005 * Warn if we have other data frame types here,
1006 * they must not get here.
1007 */
1008 WARN_ON(hdr->frame_control &
1009 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1010 WARN_ON(!(hdr->seq_ctrl &
1011 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1012 /*
1013 * This was a fragment of a frame, received while
1014 * a block-ack session was active. That cannot be
1015 * right, so terminate the session.
1016 */
1017 mutex_lock(&local->sta_mtx);
1018 sta = sta_info_get_bss(sdata, mgmt->sa);
1019 if (sta) {
1020 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1021 IEEE80211_QOS_CTL_TID_MASK;
1022
1023 __ieee80211_stop_rx_ba_session(
1024 sta, tid, WLAN_BACK_RECIPIENT,
1025 WLAN_REASON_QSTA_REQUIRE_SETUP,
1026 true);
1027 }
1028 mutex_unlock(&local->sta_mtx);
1029 } else switch (sdata->vif.type) {
1030 case NL80211_IFTYPE_STATION:
1031 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1032 break;
1033 case NL80211_IFTYPE_ADHOC:
1034 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1035 break;
1036 case NL80211_IFTYPE_MESH_POINT:
1037 if (!ieee80211_vif_is_mesh(&sdata->vif))
1038 break;
1039 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1040 break;
1041 default:
1042 WARN(1, "frame for unexpected interface type");
1043 break;
1044 }
1045
1046 kfree_skb(skb);
1047 }
1048
1049 /* then other type-dependent work */
1050 switch (sdata->vif.type) {
1051 case NL80211_IFTYPE_STATION:
1052 ieee80211_sta_work(sdata);
1053 break;
1054 case NL80211_IFTYPE_ADHOC:
1055 ieee80211_ibss_work(sdata);
1056 break;
1057 case NL80211_IFTYPE_MESH_POINT:
1058 if (!ieee80211_vif_is_mesh(&sdata->vif))
1059 break;
1060 ieee80211_mesh_work(sdata);
1061 break;
1062 default:
1063 break;
1064 }
1065 }
1066
1067
1068 /*
1069 * Helper function to initialise an interface to a specific type.
1070 */
1071 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1072 enum nl80211_iftype type)
1073 {
1074 /* clear type-dependent union */
1075 memset(&sdata->u, 0, sizeof(sdata->u));
1076
1077 /* and set some type-dependent values */
1078 sdata->vif.type = type;
1079 sdata->vif.p2p = false;
1080 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1081 sdata->wdev.iftype = type;
1082
1083 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1084 sdata->control_port_no_encrypt = false;
1085
1086 sdata->noack_map = 0;
1087
1088 /* only monitor differs */
1089 sdata->dev->type = ARPHRD_ETHER;
1090
1091 skb_queue_head_init(&sdata->skb_queue);
1092 INIT_WORK(&sdata->work, ieee80211_iface_work);
1093
1094 switch (type) {
1095 case NL80211_IFTYPE_P2P_GO:
1096 type = NL80211_IFTYPE_AP;
1097 sdata->vif.type = type;
1098 sdata->vif.p2p = true;
1099 /* fall through */
1100 case NL80211_IFTYPE_AP:
1101 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
1102 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1103 break;
1104 case NL80211_IFTYPE_P2P_CLIENT:
1105 type = NL80211_IFTYPE_STATION;
1106 sdata->vif.type = type;
1107 sdata->vif.p2p = true;
1108 /* fall through */
1109 case NL80211_IFTYPE_STATION:
1110 ieee80211_sta_setup_sdata(sdata);
1111 break;
1112 case NL80211_IFTYPE_ADHOC:
1113 ieee80211_ibss_setup_sdata(sdata);
1114 break;
1115 case NL80211_IFTYPE_MESH_POINT:
1116 if (ieee80211_vif_is_mesh(&sdata->vif))
1117 ieee80211_mesh_init_sdata(sdata);
1118 break;
1119 case NL80211_IFTYPE_MONITOR:
1120 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1121 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1122 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1123 MONITOR_FLAG_OTHER_BSS;
1124 break;
1125 case NL80211_IFTYPE_WDS:
1126 case NL80211_IFTYPE_AP_VLAN:
1127 break;
1128 case NL80211_IFTYPE_UNSPECIFIED:
1129 case NUM_NL80211_IFTYPES:
1130 BUG();
1131 break;
1132 }
1133
1134 ieee80211_debugfs_add_netdev(sdata);
1135 }
1136
1137 static void ieee80211_clean_sdata(struct ieee80211_sub_if_data *sdata)
1138 {
1139 switch (sdata->vif.type) {
1140 case NL80211_IFTYPE_MESH_POINT:
1141 mesh_path_flush_by_iface(sdata);
1142 break;
1143
1144 default:
1145 break;
1146 }
1147 }
1148
1149 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1150 enum nl80211_iftype type)
1151 {
1152 struct ieee80211_local *local = sdata->local;
1153 int ret, err;
1154 enum nl80211_iftype internal_type = type;
1155 bool p2p = false;
1156
1157 ASSERT_RTNL();
1158
1159 if (!local->ops->change_interface)
1160 return -EBUSY;
1161
1162 switch (sdata->vif.type) {
1163 case NL80211_IFTYPE_AP:
1164 case NL80211_IFTYPE_STATION:
1165 case NL80211_IFTYPE_ADHOC:
1166 /*
1167 * Could maybe also all others here?
1168 * Just not sure how that interacts
1169 * with the RX/config path e.g. for
1170 * mesh.
1171 */
1172 break;
1173 default:
1174 return -EBUSY;
1175 }
1176
1177 switch (type) {
1178 case NL80211_IFTYPE_AP:
1179 case NL80211_IFTYPE_STATION:
1180 case NL80211_IFTYPE_ADHOC:
1181 /*
1182 * Could probably support everything
1183 * but WDS here (WDS do_open can fail
1184 * under memory pressure, which this
1185 * code isn't prepared to handle).
1186 */
1187 break;
1188 case NL80211_IFTYPE_P2P_CLIENT:
1189 p2p = true;
1190 internal_type = NL80211_IFTYPE_STATION;
1191 break;
1192 case NL80211_IFTYPE_P2P_GO:
1193 p2p = true;
1194 internal_type = NL80211_IFTYPE_AP;
1195 break;
1196 default:
1197 return -EBUSY;
1198 }
1199
1200 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1201 if (ret)
1202 return ret;
1203
1204 ieee80211_do_stop(sdata, false);
1205
1206 ieee80211_teardown_sdata(sdata->dev);
1207
1208 ret = drv_change_interface(local, sdata, internal_type, p2p);
1209 if (ret)
1210 type = sdata->vif.type;
1211
1212 /*
1213 * Ignore return value here, there's not much we can do since
1214 * the driver changed the interface type internally already.
1215 * The warnings will hopefully make driver authors fix it :-)
1216 */
1217 ieee80211_check_queues(sdata);
1218
1219 ieee80211_setup_sdata(sdata, type);
1220
1221 err = ieee80211_do_open(sdata->dev, false);
1222 WARN(err, "type change: do_open returned %d", err);
1223
1224 return ret;
1225 }
1226
1227 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1228 enum nl80211_iftype type)
1229 {
1230 int ret;
1231
1232 ASSERT_RTNL();
1233
1234 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1235 return 0;
1236
1237 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1238 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
1239 type == NL80211_IFTYPE_ADHOC)
1240 return -EOPNOTSUPP;
1241
1242 if (ieee80211_sdata_running(sdata)) {
1243 ret = ieee80211_runtime_change_iftype(sdata, type);
1244 if (ret)
1245 return ret;
1246 } else {
1247 /* Purge and reset type-dependent state. */
1248 ieee80211_teardown_sdata(sdata->dev);
1249 ieee80211_setup_sdata(sdata, type);
1250 }
1251
1252 /* reset some values that shouldn't be kept across type changes */
1253 sdata->vif.bss_conf.basic_rates =
1254 ieee80211_mandatory_rates(sdata->local,
1255 sdata->local->hw.conf.channel->band);
1256 sdata->drop_unencrypted = 0;
1257 if (type == NL80211_IFTYPE_STATION)
1258 sdata->u.mgd.use_4addr = false;
1259
1260 return 0;
1261 }
1262
1263 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1264 struct net_device *dev,
1265 enum nl80211_iftype type)
1266 {
1267 struct ieee80211_sub_if_data *sdata;
1268 u64 mask, start, addr, val, inc;
1269 u8 *m;
1270 u8 tmp_addr[ETH_ALEN];
1271 int i;
1272
1273 /* default ... something at least */
1274 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1275
1276 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1277 local->hw.wiphy->n_addresses <= 1)
1278 return;
1279
1280
1281 mutex_lock(&local->iflist_mtx);
1282
1283 switch (type) {
1284 case NL80211_IFTYPE_MONITOR:
1285 /* doesn't matter */
1286 break;
1287 case NL80211_IFTYPE_WDS:
1288 case NL80211_IFTYPE_AP_VLAN:
1289 /* match up with an AP interface */
1290 list_for_each_entry(sdata, &local->interfaces, list) {
1291 if (sdata->vif.type != NL80211_IFTYPE_AP)
1292 continue;
1293 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1294 break;
1295 }
1296 /* keep default if no AP interface present */
1297 break;
1298 default:
1299 /* assign a new address if possible -- try n_addresses first */
1300 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1301 bool used = false;
1302
1303 list_for_each_entry(sdata, &local->interfaces, list) {
1304 if (memcmp(local->hw.wiphy->addresses[i].addr,
1305 sdata->vif.addr, ETH_ALEN) == 0) {
1306 used = true;
1307 break;
1308 }
1309 }
1310
1311 if (!used) {
1312 memcpy(dev->perm_addr,
1313 local->hw.wiphy->addresses[i].addr,
1314 ETH_ALEN);
1315 break;
1316 }
1317 }
1318
1319 /* try mask if available */
1320 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1321 break;
1322
1323 m = local->hw.wiphy->addr_mask;
1324 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1325 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1326 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1327
1328 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1329 /* not a contiguous mask ... not handled now! */
1330 pr_info("not contiguous\n");
1331 break;
1332 }
1333
1334 m = local->hw.wiphy->perm_addr;
1335 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1336 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1337 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1338
1339 inc = 1ULL<<__ffs64(mask);
1340 val = (start & mask);
1341 addr = (start & ~mask) | (val & mask);
1342 do {
1343 bool used = false;
1344
1345 tmp_addr[5] = addr >> 0*8;
1346 tmp_addr[4] = addr >> 1*8;
1347 tmp_addr[3] = addr >> 2*8;
1348 tmp_addr[2] = addr >> 3*8;
1349 tmp_addr[1] = addr >> 4*8;
1350 tmp_addr[0] = addr >> 5*8;
1351
1352 val += inc;
1353
1354 list_for_each_entry(sdata, &local->interfaces, list) {
1355 if (memcmp(tmp_addr, sdata->vif.addr,
1356 ETH_ALEN) == 0) {
1357 used = true;
1358 break;
1359 }
1360 }
1361
1362 if (!used) {
1363 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1364 break;
1365 }
1366 addr = (start & ~mask) | (val & mask);
1367 } while (addr != start);
1368
1369 break;
1370 }
1371
1372 mutex_unlock(&local->iflist_mtx);
1373 }
1374
1375 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1376 struct net_device **new_dev, enum nl80211_iftype type,
1377 struct vif_params *params)
1378 {
1379 struct net_device *ndev;
1380 struct ieee80211_sub_if_data *sdata = NULL;
1381 int ret, i;
1382 int txqs = 1;
1383
1384 ASSERT_RTNL();
1385
1386 if (local->hw.queues >= IEEE80211_NUM_ACS)
1387 txqs = IEEE80211_NUM_ACS;
1388
1389 ndev = alloc_netdev_mqs(sizeof(*sdata) + local->hw.vif_data_size,
1390 name, ieee80211_if_setup, txqs, 1);
1391 if (!ndev)
1392 return -ENOMEM;
1393 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1394
1395 ndev->needed_headroom = local->tx_headroom +
1396 4*6 /* four MAC addresses */
1397 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1398 + 6 /* mesh */
1399 + 8 /* rfc1042/bridge tunnel */
1400 - ETH_HLEN /* ethernet hard_header_len */
1401 + IEEE80211_ENCRYPT_HEADROOM;
1402 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1403
1404 ret = dev_alloc_name(ndev, ndev->name);
1405 if (ret < 0)
1406 goto fail;
1407
1408 ieee80211_assign_perm_addr(local, ndev, type);
1409 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1410 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1411
1412 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1413 sdata = netdev_priv(ndev);
1414 ndev->ieee80211_ptr = &sdata->wdev;
1415 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1416 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1417
1418 /* initialise type-independent data */
1419 sdata->wdev.wiphy = local->hw.wiphy;
1420 sdata->local = local;
1421 sdata->dev = ndev;
1422 #ifdef CONFIG_INET
1423 sdata->arp_filter_state = true;
1424 #endif
1425
1426 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1427 skb_queue_head_init(&sdata->fragments[i].skb_list);
1428
1429 INIT_LIST_HEAD(&sdata->key_list);
1430
1431 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1432 struct ieee80211_supported_band *sband;
1433 sband = local->hw.wiphy->bands[i];
1434 sdata->rc_rateidx_mask[i] =
1435 sband ? (1 << sband->n_bitrates) - 1 : 0;
1436 if (sband)
1437 memcpy(sdata->rc_rateidx_mcs_mask[i],
1438 sband->ht_cap.mcs.rx_mask,
1439 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1440 else
1441 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1442 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1443 }
1444
1445 ieee80211_set_default_queues(sdata);
1446
1447 /* setup type-dependent data */
1448 ieee80211_setup_sdata(sdata, type);
1449
1450 if (params) {
1451 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1452 if (type == NL80211_IFTYPE_STATION)
1453 sdata->u.mgd.use_4addr = params->use_4addr;
1454 }
1455
1456 ndev->features |= local->hw.netdev_features;
1457
1458 ret = register_netdevice(ndev);
1459 if (ret)
1460 goto fail;
1461
1462 mutex_lock(&local->iflist_mtx);
1463 list_add_tail_rcu(&sdata->list, &local->interfaces);
1464 mutex_unlock(&local->iflist_mtx);
1465
1466 if (new_dev)
1467 *new_dev = ndev;
1468
1469 return 0;
1470
1471 fail:
1472 free_netdev(ndev);
1473 return ret;
1474 }
1475
1476 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1477 {
1478 ASSERT_RTNL();
1479
1480 mutex_lock(&sdata->local->iflist_mtx);
1481 list_del_rcu(&sdata->list);
1482 mutex_unlock(&sdata->local->iflist_mtx);
1483
1484 /* clean up type-dependent data */
1485 ieee80211_clean_sdata(sdata);
1486
1487 synchronize_rcu();
1488 unregister_netdevice(sdata->dev);
1489 }
1490
1491 /*
1492 * Remove all interfaces, may only be called at hardware unregistration
1493 * time because it doesn't do RCU-safe list removals.
1494 */
1495 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1496 {
1497 struct ieee80211_sub_if_data *sdata, *tmp;
1498 LIST_HEAD(unreg_list);
1499
1500 ASSERT_RTNL();
1501
1502 mutex_lock(&local->iflist_mtx);
1503 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1504 list_del(&sdata->list);
1505
1506 ieee80211_clean_sdata(sdata);
1507
1508 unregister_netdevice_queue(sdata->dev, &unreg_list);
1509 }
1510 mutex_unlock(&local->iflist_mtx);
1511 unregister_netdevice_many(&unreg_list);
1512 list_del(&unreg_list);
1513 }
1514
1515 static int netdev_notify(struct notifier_block *nb,
1516 unsigned long state,
1517 void *ndev)
1518 {
1519 struct net_device *dev = ndev;
1520 struct ieee80211_sub_if_data *sdata;
1521
1522 if (state != NETDEV_CHANGENAME)
1523 return 0;
1524
1525 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1526 return 0;
1527
1528 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1529 return 0;
1530
1531 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1532
1533 memcpy(sdata->name, dev->name, IFNAMSIZ);
1534
1535 ieee80211_debugfs_rename_netdev(sdata);
1536 return 0;
1537 }
1538
1539 static struct notifier_block mac80211_netdev_notifier = {
1540 .notifier_call = netdev_notify,
1541 };
1542
1543 int ieee80211_iface_init(void)
1544 {
1545 return register_netdevice_notifier(&mac80211_netdev_notifier);
1546 }
1547
1548 void ieee80211_iface_exit(void)
1549 {
1550 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1551 }
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