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mac80211: simplify zero address checks
[linux-2.6-block.git] / net / mac80211 / iface.c
CommitLineData
f0706e82 1/*
0d143fe1
JB		 2 * Interface handling (except master interface)
3 *
f0706e82
JB		 4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
75636525 7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
f0706e82
JB		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
5a0e3ad6 13#include <linux/slab.h>
f0706e82
JB		 14#include <linux/kernel.h>
15#include <linux/if_arp.h>
16#include <linux/netdevice.h>
17#include <linux/rtnetlink.h>
18#include <net/mac80211.h>
cf0277e7 19#include <net/ieee80211_radiotap.h>
f0706e82
JB		 20#include "ieee80211_i.h"
21#include "sta_info.h"
e9f207f0 22#include "debugfs_netdev.h"
ee385855 23#include "mesh.h"
0d143fe1 24#include "led.h"
24487981 25#include "driver-ops.h"
cf0277e7 26#include "wme.h"
0d143fe1 27
c771c9d8
JB		 28/**
29 * DOC: Interface list locking
30 *
31 * The interface list in each struct ieee80211_local is protected
32 * three-fold:
33 *
34 * (1) modifications may only be done under the RTNL
35 * (2) modifications and readers are protected against each other by
36 * the iflist_mtx.
37 * (3) modifications are done in an RCU manner so atomic readers
38 * can traverse the list in RCU-safe blocks.
39 *
40 * As a consequence, reads (traversals) of the list can be protected
41 * by either the RTNL, the iflist_mtx or RCU.
42 */
43
44
0d143fe1
JB		 45static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
46{
47 int meshhdrlen;
48 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
49
50 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
51
52 /* FIX: what would be proper limits for MTU?
53 * This interface uses 802.3 frames. */
54 if (new_mtu < 256 ||
55 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
56 return -EINVAL;
57 }
58
59#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
60 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
61#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
62 dev->mtu = new_mtu;
63 return 0;
64}
65
47846c9b
JB		 66static int ieee80211_change_mac(struct net_device *dev, void *addr)
67{
68 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
fc5f7577 69 struct sockaddr *sa = addr;
47846c9b
JB		 70 int ret;
71
9607e6b6 72 if (ieee80211_sdata_running(sdata))
47846c9b
JB		 73 return -EBUSY;
74
fc5f7577 75 ret = eth_mac_addr(dev, sa);
47846c9b
JB		 76
77 if (ret == 0)
fc5f7577 78 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
47846c9b
JB		 79
80 return ret;
81}
82
0d143fe1
JB		 83static inline int identical_mac_addr_allowed(int type1, int type2)
84{
85 return type1 == NL80211_IFTYPE_MONITOR ||
86 type2 == NL80211_IFTYPE_MONITOR ||
87 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
88 (type1 == NL80211_IFTYPE_WDS &&
89 (type2 == NL80211_IFTYPE_WDS ||
90 type2 == NL80211_IFTYPE_AP)) ||
91 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
92 (type1 == NL80211_IFTYPE_AP_VLAN &&
93 (type2 == NL80211_IFTYPE_AP ||
94 type2 == NL80211_IFTYPE_AP_VLAN));
95}
96
97static int ieee80211_open(struct net_device *dev)
98{
b4a4bf5d
JB		 99 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
100 struct ieee80211_sub_if_data *nsdata;
101 struct ieee80211_local *local = sdata->local;
0d143fe1 102 struct sta_info *sta;
0d143fe1
JB		 103 u32 changed = 0;
104 int res;
e8975581 105 u32 hw_reconf_flags = 0;
0d143fe1 106
0d143fe1 107 /* fail early if user set an invalid address */
bf533e0b 108 if (!is_zero_ether_addr(dev->dev_addr) &&
0d143fe1
JB		 109 !is_valid_ether_addr(dev->dev_addr))
110 return -EADDRNOTAVAIL;
111
112 /* we hold the RTNL here so can safely walk the list */
113 list_for_each_entry(nsdata, &local->interfaces, list) {
114 struct net_device *ndev = nsdata->dev;
115
9607e6b6 116 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB		 117 /*
118 * Allow only a single IBSS interface to be up at any
119 * time. This is restricted because beacon distribution
120 * cannot work properly if both are in the same IBSS.
121 *
122 * To remove this restriction we'd have to disallow them
123 * from setting the same SSID on different IBSS interfaces
124 * belonging to the same hardware. Then, however, we're
125 * faced with having to adopt two different TSF timers...
126 */
127 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
128 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
129 return -EBUSY;
130
131 /*
132 * The remaining checks are only performed for interfaces
133 * with the same MAC address.
134 */
135 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
136 continue;
137
138 /*
139 * check whether it may have the same address
140 */
141 if (!identical_mac_addr_allowed(sdata->vif.type,
142 nsdata->vif.type))
143 return -ENOTUNIQ;
144
145 /*
146 * can only add VLANs to enabled APs
147 */
148 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
149 nsdata->vif.type == NL80211_IFTYPE_AP)
150 sdata->bss = &nsdata->u.ap;
151 }
152 }
153
154 switch (sdata->vif.type) {
155 case NL80211_IFTYPE_WDS:
156 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
157 return -ENOLINK;
158 break;
159 case NL80211_IFTYPE_AP_VLAN:
160 if (!sdata->bss)
161 return -ENOLINK;
162 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
163 break;
164 case NL80211_IFTYPE_AP:
165 sdata->bss = &sdata->u.ap;
166 break;
167 case NL80211_IFTYPE_MESH_POINT:
168 if (!ieee80211_vif_is_mesh(&sdata->vif))
169 break;
170 /* mesh ifaces must set allmulti to forward mcast traffic */
171 atomic_inc(&local->iff_allmultis);
172 break;
173 case NL80211_IFTYPE_STATION:
174 case NL80211_IFTYPE_MONITOR:
175 case NL80211_IFTYPE_ADHOC:
176 /* no special treatment */
177 break;
178 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 179 case NUM_NL80211_IFTYPES:
0d143fe1
JB		 180 /* cannot happen */
181 WARN_ON(1);
182 break;
183 }
184
185 if (local->open_count == 0) {
24487981 186 res = drv_start(local);
0d143fe1
JB		 187 if (res)
188 goto err_del_bss;
4e6cbfd0
JL		 189 if (local->ops->napi_poll)
190 napi_enable(&local->napi);
e8975581
JB		 191 /* we're brought up, everything changes */
192 hw_reconf_flags = ~0;
1f87f7d3 193 ieee80211_led_radio(local, true);
0d143fe1
JB		 194 }
195
196 /*
bf533e0b
JB		 197 * Copy the hopefully now-present MAC address to
198 * this interface, if it has the special null one.
0d143fe1 199 */
bf533e0b
JB		 200 if (is_zero_ether_addr(dev->dev_addr)) {
201 memcpy(dev->dev_addr,
202 local->hw.wiphy->perm_addr,
203 ETH_ALEN);
204 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
205
206 if (!is_valid_ether_addr(dev->dev_addr)) {
207 if (!local->open_count)
208 drv_stop(local);
209 return -EADDRNOTAVAIL;
0adc23f5 210 }
0d143fe1
JB		 211 }
212
0d143fe1
JB		 213 switch (sdata->vif.type) {
214 case NL80211_IFTYPE_AP_VLAN:
215 /* no need to tell driver */
216 break;
217 case NL80211_IFTYPE_MONITOR:
218 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
219 local->cooked_mntrs++;
220 break;
221 }
222
223 /* must be before the call to ieee80211_configure_filter */
224 local->monitors++;
e8975581 225 if (local->monitors == 1) {
0869aea0
JB		 226 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
227 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 228 }
0d143fe1
JB		 229
230 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
231 local->fif_fcsfail++;
232 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
233 local->fif_plcpfail++;
e3b90ca2 234 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
0d143fe1 235 local->fif_control++;
e3b90ca2
IP		 236 local->fif_pspoll++;
237 }
0d143fe1
JB		 238 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
239 local->fif_other_bss++;
240
0d143fe1 241 ieee80211_configure_filter(local);
53e9b1de
DG		 242
243 netif_carrier_on(dev);
0d143fe1 244 break;
0d143fe1 245 default:
1ed32e4f 246 res = drv_add_interface(local, &sdata->vif);
0d143fe1
JB		 247 if (res)
248 goto err_stop;
249
a3c9aa51
AY		 250 if (ieee80211_vif_is_mesh(&sdata->vif)) {
251 local->fif_other_bss++;
a3c9aa51 252 ieee80211_configure_filter(local);
a3c9aa51 253
0d143fe1 254 ieee80211_start_mesh(sdata);
e3b90ca2
IP		 255 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
256 local->fif_pspoll++;
257
e3b90ca2 258 ieee80211_configure_filter(local);
a3c9aa51 259 }
e3b90ca2 260
0d143fe1
JB		 261 changed |= ieee80211_reset_erp_info(sdata);
262 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 263
7986cf95 264 if (sdata->vif.type == NL80211_IFTYPE_STATION)
0d143fe1
JB		 265 netif_carrier_off(dev);
266 else
267 netif_carrier_on(dev);
268 }
269
270 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
271 /* Create STA entry for the WDS peer */
272 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
273 GFP_KERNEL);
274 if (!sta) {
275 res = -ENOMEM;
276 goto err_del_interface;
277 }
278
279 /* no locking required since STA is not live yet */
280 sta->flags |= WLAN_STA_AUTHORIZED;
281
282 res = sta_info_insert(sta);
283 if (res) {
284 /* STA has been freed */
285 goto err_del_interface;
286 }
287 }
288
0d143fe1
JB		 289 /*
290 * set_multicast_list will be invoked by the networking core
291 * which will check whether any increments here were done in
292 * error and sync them down to the hardware as filter flags.
293 */
294 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
295 atomic_inc(&local->iff_allmultis);
296
297 if (sdata->flags & IEEE80211_SDATA_PROMISC)
298 atomic_inc(&local->iff_promiscs);
299
7da7cc1d 300 mutex_lock(&local->mtx);
5cff20e6 301 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 302 mutex_unlock(&local->mtx);
5cff20e6 303
0d143fe1 304 local->open_count++;
e8975581
JB		 305 if (hw_reconf_flags) {
306 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1
JB		 307 /*
308 * set default queue parameters so drivers don't
309 * need to initialise the hardware if the hardware
310 * doesn't start up with sane defaults
311 */
312 ieee80211_set_wmm_default(sdata);
313 }
314
10f644a4 315 ieee80211_recalc_ps(local, -1);
965bedad 316
8a5b33f5 317 netif_tx_start_all_queues(dev);
0d143fe1
JB		 318
319 return 0;
320 err_del_interface:
1ed32e4f 321 drv_remove_interface(local, &sdata->vif);
0d143fe1 322 err_stop:
24487981
JB		 323 if (!local->open_count)
324 drv_stop(local);
0d143fe1
JB		 325 err_del_bss:
326 sdata->bss = NULL;
327 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
328 list_del(&sdata->u.vlan.list);
329 return res;
330}
331
332static int ieee80211_stop(struct net_device *dev)
333{
334 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
335 struct ieee80211_local *local = sdata->local;
5061b0c2
JB		 336 unsigned long flags;
337 struct sk_buff *skb, *tmp;
e8975581 338 u32 hw_reconf_flags = 0;
5061b0c2 339 int i;
0d143fe1
JB		 340
341 /*
342 * Stop TX on this interface first.
343 */
8a5b33f5 344 netif_tx_stop_all_queues(dev);
0d143fe1 345
af6b6374
JB		 346 /*
347 * Purge work for this interface.
348 */
349 ieee80211_work_purge(sdata);
350
0d143fe1
JB		 351 /*
352 * Remove all stations associated with this interface.
353 *
354 * This must be done before calling ops->remove_interface()
355 * because otherwise we can later invoke ops->sta_notify()
356 * whenever the STAs are removed, and that invalidates driver
357 * assumptions about always getting a vif pointer that is valid
358 * (because if we remove a STA after ops->remove_interface()
359 * the driver will have removed the vif info already!)
360 *
b9dcf712
JB		 361 * This is relevant only in AP, WDS and mesh modes, since in
362 * all other modes we've already removed all stations when
363 * disconnecting etc.
0d143fe1
JB		 364 */
365 sta_info_flush(local, sdata);
366
367 /*
368 * Don't count this interface for promisc/allmulti while it
369 * is down. dev_mc_unsync() will invoke set_multicast_list
370 * on the master interface which will sync these down to the
371 * hardware as filter flags.
372 */
373 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
374 atomic_dec(&local->iff_allmultis);
375
376 if (sdata->flags & IEEE80211_SDATA_PROMISC)
377 atomic_dec(&local->iff_promiscs);
378
e3b90ca2
IP		 379 if (sdata->vif.type == NL80211_IFTYPE_AP)
380 local->fif_pspoll--;
381
3b8d81e0
JB		 382 netif_addr_lock_bh(dev);
383 spin_lock_bh(&local->filter_lock);
22bedad3 384 __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0
JB		 385 spin_unlock_bh(&local->filter_lock);
386 netif_addr_unlock_bh(dev);
387
3ac64bee
JB		 388 ieee80211_configure_filter(local);
389
7cbf0ba5
VN		 390 del_timer_sync(&local->dynamic_ps_timer);
391 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1
JB		 392
393 /* APs need special treatment */
394 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 395 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB		 396 struct beacon_data *old_beacon = sdata->u.ap.beacon;
397
b9dcf712
JB		 398 /* sdata_running will return false, so this will disable */
399 ieee80211_bss_info_change_notify(sdata,
400 BSS_CHANGED_BEACON_ENABLED);
401
0d143fe1
JB		 402 /* remove beacon */
403 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
404 synchronize_rcu();
405 kfree(old_beacon);
406
b9dcf712
JB		 407 /* free all potentially still buffered bcast frames */
408 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
409 local->total_ps_buffered--;
410 dev_kfree_skb(skb);
411 }
412
0d143fe1 413 /* down all dependent devices, that is VLANs */
57c9fff3 414 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB		 415 u.vlan.list)
416 dev_close(vlan->dev);
417 WARN_ON(!list_empty(&sdata->u.ap.vlans));
418 }
419
420 local->open_count--;
421
422 switch (sdata->vif.type) {
423 case NL80211_IFTYPE_AP_VLAN:
424 list_del(&sdata->u.vlan.list);
425 /* no need to tell driver */
426 break;
427 case NL80211_IFTYPE_MONITOR:
428 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
429 local->cooked_mntrs--;
430 break;
431 }
432
433 local->monitors--;
e8975581 434 if (local->monitors == 0) {
0869aea0
JB		 435 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
436 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 437 }
0d143fe1
JB		 438
439 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
440 local->fif_fcsfail--;
441 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
442 local->fif_plcpfail--;
e3b90ca2
IP		 443 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
444 local->fif_pspoll--;
0d143fe1 445 local->fif_control--;
e3b90ca2 446 }
0d143fe1
JB		 447 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
448 local->fif_other_bss--;
449
0d143fe1 450 ieee80211_configure_filter(local);
0d143fe1 451 break;
0d143fe1
JB		 452 case NL80211_IFTYPE_MESH_POINT:
453 if (ieee80211_vif_is_mesh(&sdata->vif)) {
a3c9aa51
AY		 454 /* other_bss and allmulti are always set on mesh
455 * ifaces */
456 local->fif_other_bss--;
0d143fe1 457 atomic_dec(&local->iff_allmultis);
a3c9aa51 458
a3c9aa51 459 ieee80211_configure_filter(local);
a3c9aa51 460
0d143fe1
JB		 461 ieee80211_stop_mesh(sdata);
462 }
463 /* fall through */
464 default:
c1475ca9 465 flush_work(&sdata->work);
35f20c14
JB		 466 /*
467 * When we get here, the interface is marked down.
468 * Call synchronize_rcu() to wait for the RX path
469 * should it be using the interface and enqueuing
470 * frames at this very time on another CPU.
471 */
472 synchronize_rcu();
473 skb_queue_purge(&sdata->skb_queue);
474
15db0b7f
JB		 475 if (local->scan_sdata == sdata)
476 ieee80211_scan_cancel(local);
0d143fe1 477
97af7432 478 /*
b9dcf712
JB		 479 * Disable beaconing here for mesh only, AP and IBSS
480 * are already taken care of.
97af7432 481 */
b9dcf712 482 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
97af7432
BC		 483 ieee80211_bss_info_change_notify(sdata,
484 BSS_CHANGED_BEACON_ENABLED);
97af7432 485
b9dcf712
JB		 486 /*
487 * Free all remaining keys, there shouldn't be any,
488 * except maybe group keys in AP more or WDS?
489 */
ad0e2b5a 490 ieee80211_free_keys(sdata);
b9dcf712 491
1ed32e4f 492 drv_remove_interface(local, &sdata->vif);
0d143fe1
JB		 493 }
494
495 sdata->bss = NULL;
496
7da7cc1d 497 mutex_lock(&local->mtx);
5cff20e6 498 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 499 mutex_unlock(&local->mtx);
5cff20e6
JB		 500
501 ieee80211_recalc_ps(local, -1);
502
0d143fe1 503 if (local->open_count == 0) {
4e6cbfd0
JL		 504 if (local->ops->napi_poll)
505 napi_disable(&local->napi);
ea77f12f 506 ieee80211_clear_tx_pending(local);
84f6a01c 507 ieee80211_stop_device(local);
0d143fe1 508
e8975581
JB		 509 /* no reconfiguring after stop! */
510 hw_reconf_flags = 0;
0d143fe1
JB		 511 }
512
e8975581
JB		 513 /* do after stop to avoid reconfiguring when we stop anyway */
514 if (hw_reconf_flags)
515 ieee80211_hw_config(local, hw_reconf_flags);
516
5061b0c2
JB		 517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
518 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
519 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
520 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
521 if (info->control.vif == &sdata->vif) {
522 __skb_unlink(skb, &local->pending[i]);
523 dev_kfree_skb_irq(skb);
524 }
525 }
526 }
527 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
528
0d143fe1
JB		 529 return 0;
530}
531
532static void ieee80211_set_multicast_list(struct net_device *dev)
533{
0d143fe1 534 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 535 struct ieee80211_local *local = sdata->local;
0d143fe1
JB		 536 int allmulti, promisc, sdata_allmulti, sdata_promisc;
537
538 allmulti = !!(dev->flags & IFF_ALLMULTI);
539 promisc = !!(dev->flags & IFF_PROMISC);
540 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
541 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
542
543 if (allmulti != sdata_allmulti) {
544 if (dev->flags & IFF_ALLMULTI)
545 atomic_inc(&local->iff_allmultis);
546 else
547 atomic_dec(&local->iff_allmultis);
548 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
549 }
550
551 if (promisc != sdata_promisc) {
552 if (dev->flags & IFF_PROMISC)
553 atomic_inc(&local->iff_promiscs);
554 else
555 atomic_dec(&local->iff_promiscs);
556 sdata->flags ^= IEEE80211_SDATA_PROMISC;
557 }
3b8d81e0 558 spin_lock_bh(&local->filter_lock);
22bedad3 559 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 560 spin_unlock_bh(&local->filter_lock);
3ac64bee 561 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB		 562}
563
75636525
JB		 564/*
565 * Called when the netdev is removed or, by the code below, before
566 * the interface type changes.
567 */
568static void ieee80211_teardown_sdata(struct net_device *dev)
f0706e82 569{
75636525
JB		 570 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
571 struct ieee80211_local *local = sdata->local;
75636525 572 int flushed;
f0706e82
JB		 573 int i;
574
75636525
JB		 575 /* free extra data */
576 ieee80211_free_keys(sdata);
577
aee14ceb
JM		 578 ieee80211_debugfs_remove_netdev(sdata);
579
f0706e82 580 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB		 581 __skb_queue_purge(&sdata->fragments[i].skb_list);
582 sdata->fragment_next = 0;
11a843b7 583
b9dcf712
JB		 584 if (ieee80211_vif_is_mesh(&sdata->vif))
585 mesh_rmc_free(sdata);
75636525
JB		 586
587 flushed = sta_info_flush(local, sdata);
588 WARN_ON(flushed);
f0706e82
JB		 589}
590
cf0277e7
JB		 591static u16 ieee80211_netdev_select_queue(struct net_device *dev,
592 struct sk_buff *skb)
593{
594 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
595}
596
587e729e
JB		 597static const struct net_device_ops ieee80211_dataif_ops = {
598 .ndo_open = ieee80211_open,
599 .ndo_stop = ieee80211_stop,
600 .ndo_uninit = ieee80211_teardown_sdata,
601 .ndo_start_xmit = ieee80211_subif_start_xmit,
602 .ndo_set_multicast_list = ieee80211_set_multicast_list,
603 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 604 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 605 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB		 606};
607
cf0277e7
JB		 608static u16 ieee80211_monitor_select_queue(struct net_device *dev,
609 struct sk_buff *skb)
610{
611 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
612 struct ieee80211_local *local = sdata->local;
613 struct ieee80211_hdr *hdr;
614 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
193e70ef 615 u8 *p;
cf0277e7
JB		 616
617 if (local->hw.queues < 4)
618 return 0;
619
620 if (skb->len < 4 ||
b49bb574 621 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB		 622 return 0; /* doesn't matter, frame will be dropped */
623
b49bb574 624 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 625
861a57cd 626 if (!ieee80211_is_data(hdr->frame_control)) {
cf0277e7
JB		 627 skb->priority = 7;
628 return ieee802_1d_to_ac[skb->priority];
629 }
861a57cd
FF		 630 if (!ieee80211_is_data_qos(hdr->frame_control)) {
631 skb->priority = 0;
632 return ieee802_1d_to_ac[skb->priority];
633 }
cf0277e7 634
193e70ef
FF		 635 p = ieee80211_get_qos_ctl(hdr);
636 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
637
cf0277e7
JB		 638 return ieee80211_downgrade_queue(local, skb);
639}
640
587e729e
JB		 641static const struct net_device_ops ieee80211_monitorif_ops = {
642 .ndo_open = ieee80211_open,
643 .ndo_stop = ieee80211_stop,
644 .ndo_uninit = ieee80211_teardown_sdata,
645 .ndo_start_xmit = ieee80211_monitor_start_xmit,
646 .ndo_set_multicast_list = ieee80211_set_multicast_list,
647 .ndo_change_mtu = ieee80211_change_mtu,
648 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 649 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB		 650};
651
652static void ieee80211_if_setup(struct net_device *dev)
653{
654 ether_setup(dev);
655 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB		 656 dev->destructor = free_netdev;
657}
658
1fa57d01
JB		 659static void ieee80211_iface_work(struct work_struct *work)
660{
661 struct ieee80211_sub_if_data *sdata =
662 container_of(work, struct ieee80211_sub_if_data, work);
663 struct ieee80211_local *local = sdata->local;
664 struct sk_buff *skb;
344eec67 665 struct sta_info *sta;
c1475ca9 666 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB		 667
668 if (!ieee80211_sdata_running(sdata))
669 return;
670
671 if (local->scanning)
672 return;
673
674 /*
675 * ieee80211_queue_work() should have picked up most cases,
676 * here we'll pick the rest.
677 */
678 if (WARN(local->suspended,
679 "interface work scheduled while going to suspend\n"))
680 return;
681
682 /* first process frames */
683 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB		 684 struct ieee80211_mgmt *mgmt = (void *)skb->data;
685
c1475ca9
JB		 686 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
687 ra_tid = (void *)&skb->cb;
688 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
689 ra_tid->tid);
690 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
691 ra_tid = (void *)&skb->cb;
692 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
693 ra_tid->tid);
694 } else if (ieee80211_is_action(mgmt->frame_control) &&
695 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 696 int len = skb->len;
bed7ee6e 697
a93e3644 698 mutex_lock(&local->sta_mtx);
875ae5f6 699 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB		 700 if (sta) {
701 switch (mgmt->u.action.u.addba_req.action_code) {
702 case WLAN_ACTION_ADDBA_REQ:
703 ieee80211_process_addba_request(
704 local, sta, mgmt, len);
705 break;
706 case WLAN_ACTION_ADDBA_RESP:
707 ieee80211_process_addba_resp(local, sta,
708 mgmt, len);
709 break;
710 case WLAN_ACTION_DELBA:
711 ieee80211_process_delba(sdata, sta,
712 mgmt, len);
713 break;
714 default:
715 WARN_ON(1);
716 break;
717 }
718 }
a93e3644 719 mutex_unlock(&local->sta_mtx);
344eec67
JB		 720 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
721 struct ieee80211_hdr *hdr = (void *)mgmt;
722 /*
723 * So the frame isn't mgmt, but frame_control
724 * is at the right place anyway, of course, so
725 * the if statement is correct.
726 *
727 * Warn if we have other data frame types here,
728 * they must not get here.
729 */
730 WARN_ON(hdr->frame_control &
731 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
732 WARN_ON(!(hdr->seq_ctrl &
733 cpu_to_le16(IEEE80211_SCTL_FRAG)));
734 /*
735 * This was a fragment of a frame, received while
736 * a block-ack session was active. That cannot be
737 * right, so terminate the session.
738 */
a93e3644 739 mutex_lock(&local->sta_mtx);
875ae5f6 740 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB		 741 if (sta) {
742 u16 tid = *ieee80211_get_qos_ctl(hdr) &
743 IEEE80211_QOS_CTL_TID_MASK;
744
745 __ieee80211_stop_rx_ba_session(
746 sta, tid, WLAN_BACK_RECIPIENT,
747 WLAN_REASON_QSTA_REQUIRE_SETUP);
748 }
a93e3644 749 mutex_unlock(&local->sta_mtx);
bed7ee6e 750 } else switch (sdata->vif.type) {
1fa57d01
JB		 751 case NL80211_IFTYPE_STATION:
752 ieee80211_sta_rx_queued_mgmt(sdata, skb);
753 break;
754 case NL80211_IFTYPE_ADHOC:
755 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
756 break;
757 case NL80211_IFTYPE_MESH_POINT:
758 if (!ieee80211_vif_is_mesh(&sdata->vif))
759 break;
760 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
761 break;
762 default:
763 WARN(1, "frame for unexpected interface type");
1fa57d01
JB		 764 break;
765 }
36b3a628
JB		 766
767 kfree_skb(skb);
1fa57d01
JB		 768 }
769
770 /* then other type-dependent work */
771 switch (sdata->vif.type) {
772 case NL80211_IFTYPE_STATION:
773 ieee80211_sta_work(sdata);
774 break;
775 case NL80211_IFTYPE_ADHOC:
776 ieee80211_ibss_work(sdata);
777 break;
778 case NL80211_IFTYPE_MESH_POINT:
779 if (!ieee80211_vif_is_mesh(&sdata->vif))
780 break;
781 ieee80211_mesh_work(sdata);
782 break;
783 default:
784 break;
785 }
786}
787
788
75636525
JB		 789/*
790 * Helper function to initialise an interface to a specific type.
791 */
792static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 793 enum nl80211_iftype type)
f0706e82 794{
75636525
JB		 795 /* clear type-dependent union */
796 memset(&sdata->u, 0, sizeof(sdata->u));
797
798 /* and set some type-dependent values */
799 sdata->vif.type = type;
587e729e 800 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
60719ffd 801 sdata->wdev.iftype = type;
75636525 802
a621fa4d
JB		 803 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
804 sdata->control_port_no_encrypt = false;
805
75636525
JB		 806 /* only monitor differs */
807 sdata->dev->type = ARPHRD_ETHER;
808
35f20c14 809 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 810 INIT_WORK(&sdata->work, ieee80211_iface_work);
35f20c14 811
75636525 812 switch (type) {
05c914fe 813 case NL80211_IFTYPE_AP:
75636525
JB		 814 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
815 INIT_LIST_HEAD(&sdata->u.ap.vlans);
816 break;
05c914fe 817 case NL80211_IFTYPE_STATION:
9c6bd790 818 ieee80211_sta_setup_sdata(sdata);
472dbc45 819 break;
46900298
JB		 820 case NL80211_IFTYPE_ADHOC:
821 ieee80211_ibss_setup_sdata(sdata);
822 break;
05c914fe 823 case NL80211_IFTYPE_MESH_POINT:
75636525
JB		 824 if (ieee80211_vif_is_mesh(&sdata->vif))
825 ieee80211_mesh_init_sdata(sdata);
826 break;
05c914fe 827 case NL80211_IFTYPE_MONITOR:
75636525 828 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 829 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB		 830 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
831 MONITOR_FLAG_OTHER_BSS;
832 break;
05c914fe
JB		 833 case NL80211_IFTYPE_WDS:
834 case NL80211_IFTYPE_AP_VLAN:
75636525 835 break;
05c914fe 836 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 837 case NUM_NL80211_IFTYPES:
75636525
JB		 838 BUG();
839 break;
840 }
841
842 ieee80211_debugfs_add_netdev(sdata);
843}
844
f3947e2d 845int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 846 enum nl80211_iftype type)
75636525 847{
f3947e2d
JB		 848 ASSERT_RTNL();
849
850 if (type == sdata->vif.type)
851 return 0;
852
e60c7744 853 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
dcebf45c
PR		 854 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
855 type == NL80211_IFTYPE_ADHOC)
e60c7744
JB		 856 return -EOPNOTSUPP;
857
f3947e2d
JB		 858 /*
859 * We could, here, on changes between IBSS/STA/MESH modes,
860 * invoke an MLME function instead that disassociates etc.
861 * and goes into the requested mode.
862 */
863
9607e6b6 864 if (ieee80211_sdata_running(sdata))
f3947e2d
JB		 865 return -EBUSY;
866
75636525
JB		 867 /* Purge and reset type-dependent state. */
868 ieee80211_teardown_sdata(sdata->dev);
869 ieee80211_setup_sdata(sdata, type);
870
871 /* reset some values that shouldn't be kept across type changes */
bda3933a 872 sdata->vif.bss_conf.basic_rates =
96dd22ac
JB		 873 ieee80211_mandatory_rates(sdata->local,
874 sdata->local->hw.conf.channel->band);
75636525 875 sdata->drop_unencrypted = 0;
9bc383de
JB		 876 if (type == NL80211_IFTYPE_STATION)
877 sdata->u.mgd.use_4addr = false;
f3947e2d
JB		 878
879 return 0;
f0706e82
JB		 880}
881
fa9029f8
JB		 882static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
883 struct net_device *dev,
884 enum nl80211_iftype type)
885{
886 struct ieee80211_sub_if_data *sdata;
887 u64 mask, start, addr, val, inc;
888 u8 *m;
889 u8 tmp_addr[ETH_ALEN];
890 int i;
891
892 /* default ... something at least */
893 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
894
895 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
896 local->hw.wiphy->n_addresses <= 1)
897 return;
898
899
900 mutex_lock(&local->iflist_mtx);
901
902 switch (type) {
903 case NL80211_IFTYPE_MONITOR:
904 /* doesn't matter */
905 break;
906 case NL80211_IFTYPE_WDS:
907 case NL80211_IFTYPE_AP_VLAN:
908 /* match up with an AP interface */
909 list_for_each_entry(sdata, &local->interfaces, list) {
910 if (sdata->vif.type != NL80211_IFTYPE_AP)
911 continue;
912 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
913 break;
914 }
915 /* keep default if no AP interface present */
916 break;
917 default:
918 /* assign a new address if possible -- try n_addresses first */
919 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
920 bool used = false;
921
922 list_for_each_entry(sdata, &local->interfaces, list) {
923 if (memcmp(local->hw.wiphy->addresses[i].addr,
924 sdata->vif.addr, ETH_ALEN) == 0) {
925 used = true;
926 break;
927 }
928 }
929
930 if (!used) {
931 memcpy(dev->perm_addr,
932 local->hw.wiphy->addresses[i].addr,
933 ETH_ALEN);
934 break;
935 }
936 }
937
938 /* try mask if available */
939 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
940 break;
941
942 m = local->hw.wiphy->addr_mask;
943 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
944 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
945 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
946
947 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
948 /* not a contiguous mask ... not handled now! */
949 printk(KERN_DEBUG "not contiguous\n");
950 break;
951 }
952
953 m = local->hw.wiphy->perm_addr;
954 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
955 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
956 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
957
958 inc = 1ULL<<__ffs64(mask);
959 val = (start & mask);
960 addr = (start & ~mask) | (val & mask);
961 do {
962 bool used = false;
963
964 tmp_addr[5] = addr >> 0*8;
965 tmp_addr[4] = addr >> 1*8;
966 tmp_addr[3] = addr >> 2*8;
967 tmp_addr[2] = addr >> 3*8;
968 tmp_addr[1] = addr >> 4*8;
969 tmp_addr[0] = addr >> 5*8;
970
971 val += inc;
972
973 list_for_each_entry(sdata, &local->interfaces, list) {
974 if (memcmp(tmp_addr, sdata->vif.addr,
975 ETH_ALEN) == 0) {
976 used = true;
977 break;
978 }
979 }
980
981 if (!used) {
982 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
983 break;
984 }
985 addr = (start & ~mask) | (val & mask);
986 } while (addr != start);
987
988 break;
989 }
990
991 mutex_unlock(&local->iflist_mtx);
992}
993
3e122be0 994int ieee80211_if_add(struct ieee80211_local *local, const char *name,
05c914fe 995 struct net_device **new_dev, enum nl80211_iftype type,
ee385855 996 struct vif_params *params)
f0706e82
JB		 997{
998 struct net_device *ndev;
f0706e82 999 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1000 int ret, i;
f0706e82
JB		 1001
1002 ASSERT_RTNL();
75636525 1003
cf0277e7
JB		 1004 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1005 name, ieee80211_if_setup, local->hw.queues);
f0706e82
JB		 1006 if (!ndev)
1007 return -ENOMEM;
a272a720 1008 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
f0706e82 1009
f3994ece
JB		 1010 ndev->needed_headroom = local->tx_headroom +
1011 4*6 /* four MAC addresses */
1012 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1013 + 6 /* mesh */
1014 + 8 /* rfc1042/bridge tunnel */
1015 - ETH_HLEN /* ethernet hard_header_len */
1016 + IEEE80211_ENCRYPT_HEADROOM;
1017 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1018
f0706e82
JB		 1019 ret = dev_alloc_name(ndev, ndev->name);
1020 if (ret < 0)
1021 goto fail;
1022
fa9029f8
JB		 1023 ieee80211_assign_perm_addr(local, ndev, type);
1024 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f0706e82
JB		 1025 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1026
3e122be0
JB		 1027 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1028 sdata = netdev_priv(ndev);
f0706e82 1029 ndev->ieee80211_ptr = &sdata->wdev;
47846c9b
JB		 1030 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1031 memcpy(sdata->name, ndev->name, IFNAMSIZ);
75636525
JB		 1032
1033 /* initialise type-independent data */
f0706e82 1034 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1035 sdata->local = local;
75636525 1036 sdata->dev = ndev;
68542962
JO		 1037#ifdef CONFIG_INET
1038 sdata->arp_filter_state = true;
1039#endif
75636525
JB		 1040
1041 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1042 skb_queue_head_init(&sdata->fragments[i].skb_list);
1043
1044 INIT_LIST_HEAD(&sdata->key_list);
1045
37eb0b16
JM		 1046 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1047 struct ieee80211_supported_band *sband;
1048 sband = local->hw.wiphy->bands[i];
1049 sdata->rc_rateidx_mask[i] =
1050 sband ? (1 << sband->n_bitrates) - 1 : 0;
1051 }
75636525
JB		 1052
1053 /* setup type-dependent data */
1054 ieee80211_setup_sdata(sdata, type);
f0706e82 1055
9bc383de
JB		 1056 if (params) {
1057 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1058 if (type == NL80211_IFTYPE_STATION)
1059 sdata->u.mgd.use_4addr = params->use_4addr;
1060 }
1061
f0706e82
JB		 1062 ret = register_netdevice(ndev);
1063 if (ret)
1064 goto fail;
1065
902acc78
JB		 1066 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1067 params && params->mesh_id_len)
472dbc45
JB		 1068 ieee80211_sdata_set_mesh_id(sdata,
1069 params->mesh_id_len,
1070 params->mesh_id);
ee385855 1071
c771c9d8 1072 mutex_lock(&local->iflist_mtx);
79010420 1073 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1074 mutex_unlock(&local->iflist_mtx);
79010420 1075
f0706e82
JB		 1076 if (new_dev)
1077 *new_dev = ndev;
f0706e82 1078
f0706e82
JB		 1079 return 0;
1080
75636525 1081 fail:
f0706e82
JB		 1082 free_netdev(ndev);
1083 return ret;
1084}
1085
f698d856 1086void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1087{
f0706e82 1088 ASSERT_RTNL();
11a843b7 1089
c771c9d8 1090 mutex_lock(&sdata->local->iflist_mtx);
75636525 1091 list_del_rcu(&sdata->list);
c771c9d8
JB		 1092 mutex_unlock(&sdata->local->iflist_mtx);
1093
75636525 1094 synchronize_rcu();
f698d856 1095 unregister_netdevice(sdata->dev);
f0706e82
JB		 1096}
1097
75636525
JB		 1098/*
1099 * Remove all interfaces, may only be called at hardware unregistration
1100 * time because it doesn't do RCU-safe list removals.
1101 */
1102void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1103{
75636525 1104 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1105 LIST_HEAD(unreg_list);
f0706e82
JB		 1106
1107 ASSERT_RTNL();
1108
efe117ab 1109 mutex_lock(&local->iflist_mtx);
75636525
JB		 1110 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1111 list_del(&sdata->list);
c771c9d8 1112
efe117ab 1113 unregister_netdevice_queue(sdata->dev, &unreg_list);
f0706e82 1114 }
efe117ab
ED		 1115 mutex_unlock(&local->iflist_mtx);
1116 unregister_netdevice_many(&unreg_list);
f0706e82 1117}
5cff20e6
JB		 1118
1119static u32 ieee80211_idle_off(struct ieee80211_local *local,
1120 const char *reason)
1121{
1122 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1123 return 0;
1124
1125#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec 1126 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
5cff20e6
JB		 1127#endif
1128
1129 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1130 return IEEE80211_CONF_CHANGE_IDLE;
1131}
1132
1133static u32 ieee80211_idle_on(struct ieee80211_local *local)
1134{
1135 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1136 return 0;
1137
1138#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec 1139 wiphy_debug(local->hw.wiphy, "device now idle\n");
5cff20e6
JB		 1140#endif
1141
a80f7c0b
JB		 1142 drv_flush(local, false);
1143
5cff20e6
JB		 1144 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1145 return IEEE80211_CONF_CHANGE_IDLE;
1146}
1147
1148u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1149{
1150 struct ieee80211_sub_if_data *sdata;
1151 int count = 0;
7da7cc1d
JB		 1152 bool working = false, scanning = false;
1153 struct ieee80211_work *wk;
5cff20e6 1154
7da7cc1d
JB		 1155#ifdef CONFIG_PROVE_LOCKING
1156 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1157 !lockdep_is_held(&local->iflist_mtx));
1158#endif
1159 lockdep_assert_held(&local->mtx);
5cff20e6
JB		 1160
1161 list_for_each_entry(sdata, &local->interfaces, list) {
7da7cc1d
JB		 1162 if (!ieee80211_sdata_running(sdata)) {
1163 sdata->vif.bss_conf.idle = true;
5cff20e6 1164 continue;
7da7cc1d
JB		 1165 }
1166
1167 sdata->old_idle = sdata->vif.bss_conf.idle;
1168
5cff20e6
JB		 1169 /* do not count disabled managed interfaces */
1170 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
7da7cc1d
JB		 1171 !sdata->u.mgd.associated) {
1172 sdata->vif.bss_conf.idle = true;
5cff20e6 1173 continue;
7da7cc1d 1174 }
5cff20e6
JB		 1175 /* do not count unused IBSS interfaces */
1176 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
7da7cc1d
JB		 1177 !sdata->u.ibss.ssid_len) {
1178 sdata->vif.bss_conf.idle = true;
5cff20e6 1179 continue;
7da7cc1d 1180 }
5cff20e6
JB		 1181 /* count everything else */
1182 count++;
1183 }
1184
7da7cc1d
JB		 1185 list_for_each_entry(wk, &local->work_list, list) {
1186 working = true;
1187 wk->sdata->vif.bss_conf.idle = false;
1188 }
1189
1190 if (local->scan_sdata) {
1191 scanning = true;
1192 local->scan_sdata->vif.bss_conf.idle = false;
1193 }
1194
1195 list_for_each_entry(sdata, &local->interfaces, list) {
1196 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1197 continue;
1198 if (!ieee80211_sdata_running(sdata))
1199 continue;
1200 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1201 }
1202
1203 if (working)
1204 return ieee80211_idle_off(local, "working");
1205 if (scanning)
1206 return ieee80211_idle_off(local, "scanning");
5cff20e6
JB		 1207 if (!count)
1208 return ieee80211_idle_on(local);
1209 else
1210 return ieee80211_idle_off(local, "in use");
1211
1212 return 0;
1213}
1214
1215void ieee80211_recalc_idle(struct ieee80211_local *local)
1216{
1217 u32 chg;
1218
1219 mutex_lock(&local->iflist_mtx);
1220 chg = __ieee80211_recalc_idle(local);
1221 mutex_unlock(&local->iflist_mtx);
58905ca5
JB		 1222 if (chg)
1223 ieee80211_hw_config(local, chg);
5cff20e6 1224}
47846c9b
JB		 1225
1226static int netdev_notify(struct notifier_block *nb,
1227 unsigned long state,
1228 void *ndev)
1229{
1230 struct net_device *dev = ndev;
1231 struct ieee80211_sub_if_data *sdata;
1232
1233 if (state != NETDEV_CHANGENAME)
1234 return 0;
1235
1236 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1237 return 0;
1238
1239 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1240 return 0;
1241
1242 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1243
2f5265e6 1244 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB		 1245
1246 ieee80211_debugfs_rename_netdev(sdata);
1247 return 0;
1248}
1249
1250static struct notifier_block mac80211_netdev_notifier = {
1251 .notifier_call = netdev_notify,
1252};
1253
1254int ieee80211_iface_init(void)
1255{
1256 return register_netdevice_notifier(&mac80211_netdev_notifier);
1257}
1258
1259void ieee80211_iface_exit(void)
1260{
1261 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1262}
Linux 6.x block layer and io_uring tree(s)