wireless: Use first phyX name available when registering phy devices.
[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
87490f6d
JB
97static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
98 enum nl80211_iftype iftype)
0d143fe1 99{
b4a4bf5d 100 struct ieee80211_local *local = sdata->local;
87490f6d
JB
101 struct ieee80211_sub_if_data *nsdata;
102 struct net_device *dev = sdata->dev;
0d143fe1 103
87490f6d 104 ASSERT_RTNL();
0d143fe1
JB
105
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(nsdata, &local->interfaces, list) {
108 struct net_device *ndev = nsdata->dev;
109
9607e6b6 110 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
0d143fe1
JB
111 /*
112 * Allow only a single IBSS interface to be up at any
113 * time. This is restricted because beacon distribution
114 * cannot work properly if both are in the same IBSS.
115 *
116 * To remove this restriction we'd have to disallow them
117 * from setting the same SSID on different IBSS interfaces
118 * belonging to the same hardware. Then, however, we're
119 * faced with having to adopt two different TSF timers...
120 */
87490f6d 121 if (iftype == NL80211_IFTYPE_ADHOC &&
0d143fe1
JB
122 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
123 return -EBUSY;
124
125 /*
126 * The remaining checks are only performed for interfaces
127 * with the same MAC address.
128 */
129 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
130 continue;
131
132 /*
133 * check whether it may have the same address
134 */
87490f6d 135 if (!identical_mac_addr_allowed(iftype,
0d143fe1
JB
136 nsdata->vif.type))
137 return -ENOTUNIQ;
138
139 /*
140 * can only add VLANs to enabled APs
141 */
87490f6d 142 if (iftype == NL80211_IFTYPE_AP_VLAN &&
0d143fe1
JB
143 nsdata->vif.type == NL80211_IFTYPE_AP)
144 sdata->bss = &nsdata->u.ap;
145 }
146 }
147
87490f6d
JB
148 return 0;
149}
150
34d4bc4d
JB
151/*
152 * NOTE: Be very careful when changing this function, it must NOT return
153 * an error on interface type changes that have been pre-checked, so most
154 * checks should be in ieee80211_check_concurrent_iface.
155 */
156static int ieee80211_do_open(struct net_device *dev, bool coming_up)
87490f6d
JB
157{
158 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
159 struct ieee80211_local *local = sdata->local;
160 struct sta_info *sta;
161 u32 changed = 0;
162 int res;
163 u32 hw_reconf_flags = 0;
164
0d143fe1
JB
165 switch (sdata->vif.type) {
166 case NL80211_IFTYPE_WDS:
167 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
168 return -ENOLINK;
169 break;
170 case NL80211_IFTYPE_AP_VLAN:
171 if (!sdata->bss)
172 return -ENOLINK;
173 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
174 break;
175 case NL80211_IFTYPE_AP:
176 sdata->bss = &sdata->u.ap;
177 break;
178 case NL80211_IFTYPE_MESH_POINT:
179 if (!ieee80211_vif_is_mesh(&sdata->vif))
180 break;
181 /* mesh ifaces must set allmulti to forward mcast traffic */
182 atomic_inc(&local->iff_allmultis);
183 break;
184 case NL80211_IFTYPE_STATION:
185 case NL80211_IFTYPE_MONITOR:
186 case NL80211_IFTYPE_ADHOC:
187 /* no special treatment */
188 break;
189 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 190 case NUM_NL80211_IFTYPES:
2ca27bcf
JB
191 case NL80211_IFTYPE_P2P_CLIENT:
192 case NL80211_IFTYPE_P2P_GO:
0d143fe1
JB
193 /* cannot happen */
194 WARN_ON(1);
195 break;
196 }
197
198 if (local->open_count == 0) {
24487981 199 res = drv_start(local);
0d143fe1
JB
200 if (res)
201 goto err_del_bss;
4e6cbfd0
JL
202 if (local->ops->napi_poll)
203 napi_enable(&local->napi);
e8975581
JB
204 /* we're brought up, everything changes */
205 hw_reconf_flags = ~0;
1f87f7d3 206 ieee80211_led_radio(local, true);
0d143fe1
JB
207 }
208
209 /*
bf533e0b
JB
210 * Copy the hopefully now-present MAC address to
211 * this interface, if it has the special null one.
0d143fe1 212 */
bf533e0b
JB
213 if (is_zero_ether_addr(dev->dev_addr)) {
214 memcpy(dev->dev_addr,
215 local->hw.wiphy->perm_addr,
216 ETH_ALEN);
217 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
218
219 if (!is_valid_ether_addr(dev->dev_addr)) {
220 if (!local->open_count)
221 drv_stop(local);
222 return -EADDRNOTAVAIL;
0adc23f5 223 }
0d143fe1
JB
224 }
225
0d143fe1
JB
226 switch (sdata->vif.type) {
227 case NL80211_IFTYPE_AP_VLAN:
228 /* no need to tell driver */
229 break;
230 case NL80211_IFTYPE_MONITOR:
231 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
232 local->cooked_mntrs++;
233 break;
234 }
235
236 /* must be before the call to ieee80211_configure_filter */
237 local->monitors++;
e8975581 238 if (local->monitors == 1) {
0869aea0
JB
239 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
240 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 241 }
0d143fe1
JB
242
243 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
244 local->fif_fcsfail++;
245 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
246 local->fif_plcpfail++;
e3b90ca2 247 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
0d143fe1 248 local->fif_control++;
e3b90ca2
IP
249 local->fif_pspoll++;
250 }
0d143fe1
JB
251 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
252 local->fif_other_bss++;
253
0d143fe1 254 ieee80211_configure_filter(local);
53e9b1de
DG
255
256 netif_carrier_on(dev);
0d143fe1 257 break;
0d143fe1 258 default:
34d4bc4d
JB
259 if (coming_up) {
260 res = drv_add_interface(local, &sdata->vif);
261 if (res)
262 goto err_stop;
263 }
0d143fe1 264
a3c9aa51
AY
265 if (ieee80211_vif_is_mesh(&sdata->vif)) {
266 local->fif_other_bss++;
a3c9aa51 267 ieee80211_configure_filter(local);
a3c9aa51 268
0d143fe1 269 ieee80211_start_mesh(sdata);
e3b90ca2
IP
270 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
271 local->fif_pspoll++;
272
e3b90ca2 273 ieee80211_configure_filter(local);
a3c9aa51 274 }
e3b90ca2 275
0d143fe1
JB
276 changed |= ieee80211_reset_erp_info(sdata);
277 ieee80211_bss_info_change_notify(sdata, changed);
0d143fe1 278
7986cf95 279 if (sdata->vif.type == NL80211_IFTYPE_STATION)
0d143fe1
JB
280 netif_carrier_off(dev);
281 else
282 netif_carrier_on(dev);
283 }
284
2d2080c3
JB
285 set_bit(SDATA_STATE_RUNNING, &sdata->state);
286
0d143fe1
JB
287 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
288 /* Create STA entry for the WDS peer */
289 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
290 GFP_KERNEL);
291 if (!sta) {
292 res = -ENOMEM;
293 goto err_del_interface;
294 }
295
296 /* no locking required since STA is not live yet */
297 sta->flags |= WLAN_STA_AUTHORIZED;
298
299 res = sta_info_insert(sta);
300 if (res) {
301 /* STA has been freed */
302 goto err_del_interface;
303 }
304 }
305
0d143fe1
JB
306 /*
307 * set_multicast_list will be invoked by the networking core
308 * which will check whether any increments here were done in
309 * error and sync them down to the hardware as filter flags.
310 */
311 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
312 atomic_inc(&local->iff_allmultis);
313
314 if (sdata->flags & IEEE80211_SDATA_PROMISC)
315 atomic_inc(&local->iff_promiscs);
316
7da7cc1d 317 mutex_lock(&local->mtx);
5cff20e6 318 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 319 mutex_unlock(&local->mtx);
5cff20e6 320
34d4bc4d
JB
321 if (coming_up)
322 local->open_count++;
323
e8975581
JB
324 if (hw_reconf_flags) {
325 ieee80211_hw_config(local, hw_reconf_flags);
0d143fe1
JB
326 /*
327 * set default queue parameters so drivers don't
328 * need to initialise the hardware if the hardware
329 * doesn't start up with sane defaults
330 */
331 ieee80211_set_wmm_default(sdata);
332 }
333
10f644a4 334 ieee80211_recalc_ps(local, -1);
965bedad 335
8a5b33f5 336 netif_tx_start_all_queues(dev);
0d143fe1
JB
337
338 return 0;
339 err_del_interface:
1ed32e4f 340 drv_remove_interface(local, &sdata->vif);
0d143fe1 341 err_stop:
24487981
JB
342 if (!local->open_count)
343 drv_stop(local);
0d143fe1
JB
344 err_del_bss:
345 sdata->bss = NULL;
346 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
347 list_del(&sdata->u.vlan.list);
2d2080c3 348 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
0d143fe1
JB
349 return res;
350}
351
34d4bc4d 352static int ieee80211_open(struct net_device *dev)
0d143fe1
JB
353{
354 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
34d4bc4d
JB
355 int err;
356
357 /* fail early if user set an invalid address */
358 if (!is_zero_ether_addr(dev->dev_addr) &&
359 !is_valid_ether_addr(dev->dev_addr))
360 return -EADDRNOTAVAIL;
361
362 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
363 if (err)
364 return err;
365
366 return ieee80211_do_open(dev, true);
367}
368
369static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
370 bool going_down)
371{
0d143fe1 372 struct ieee80211_local *local = sdata->local;
5061b0c2
JB
373 unsigned long flags;
374 struct sk_buff *skb, *tmp;
e8975581 375 u32 hw_reconf_flags = 0;
5061b0c2 376 int i;
0d143fe1 377
34d4bc4d
JB
378 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
379
0d143fe1
JB
380 /*
381 * Stop TX on this interface first.
382 */
34d4bc4d 383 netif_tx_stop_all_queues(sdata->dev);
0d143fe1 384
af6b6374
JB
385 /*
386 * Purge work for this interface.
387 */
388 ieee80211_work_purge(sdata);
389
0d143fe1
JB
390 /*
391 * Remove all stations associated with this interface.
392 *
393 * This must be done before calling ops->remove_interface()
394 * because otherwise we can later invoke ops->sta_notify()
395 * whenever the STAs are removed, and that invalidates driver
396 * assumptions about always getting a vif pointer that is valid
397 * (because if we remove a STA after ops->remove_interface()
398 * the driver will have removed the vif info already!)
399 *
b9dcf712
JB
400 * This is relevant only in AP, WDS and mesh modes, since in
401 * all other modes we've already removed all stations when
402 * disconnecting etc.
0d143fe1
JB
403 */
404 sta_info_flush(local, sdata);
405
406 /*
407 * Don't count this interface for promisc/allmulti while it
408 * is down. dev_mc_unsync() will invoke set_multicast_list
409 * on the master interface which will sync these down to the
410 * hardware as filter flags.
411 */
412 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
413 atomic_dec(&local->iff_allmultis);
414
415 if (sdata->flags & IEEE80211_SDATA_PROMISC)
416 atomic_dec(&local->iff_promiscs);
417
e3b90ca2
IP
418 if (sdata->vif.type == NL80211_IFTYPE_AP)
419 local->fif_pspoll--;
420
34d4bc4d 421 netif_addr_lock_bh(sdata->dev);
3b8d81e0 422 spin_lock_bh(&local->filter_lock);
34d4bc4d
JB
423 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
424 sdata->dev->addr_len);
3b8d81e0 425 spin_unlock_bh(&local->filter_lock);
34d4bc4d 426 netif_addr_unlock_bh(sdata->dev);
3b8d81e0 427
3ac64bee
JB
428 ieee80211_configure_filter(local);
429
7cbf0ba5
VN
430 del_timer_sync(&local->dynamic_ps_timer);
431 cancel_work_sync(&local->dynamic_ps_enable_work);
0d143fe1
JB
432
433 /* APs need special treatment */
434 if (sdata->vif.type == NL80211_IFTYPE_AP) {
57c9fff3 435 struct ieee80211_sub_if_data *vlan, *tmpsdata;
0d143fe1
JB
436 struct beacon_data *old_beacon = sdata->u.ap.beacon;
437
b9dcf712
JB
438 /* sdata_running will return false, so this will disable */
439 ieee80211_bss_info_change_notify(sdata,
440 BSS_CHANGED_BEACON_ENABLED);
441
0d143fe1
JB
442 /* remove beacon */
443 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
444 synchronize_rcu();
445 kfree(old_beacon);
446
b9dcf712
JB
447 /* free all potentially still buffered bcast frames */
448 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
449 local->total_ps_buffered--;
450 dev_kfree_skb(skb);
451 }
452
0d143fe1 453 /* down all dependent devices, that is VLANs */
57c9fff3 454 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
0d143fe1
JB
455 u.vlan.list)
456 dev_close(vlan->dev);
457 WARN_ON(!list_empty(&sdata->u.ap.vlans));
458 }
459
34d4bc4d
JB
460 if (going_down)
461 local->open_count--;
0d143fe1
JB
462
463 switch (sdata->vif.type) {
464 case NL80211_IFTYPE_AP_VLAN:
465 list_del(&sdata->u.vlan.list);
466 /* no need to tell driver */
467 break;
468 case NL80211_IFTYPE_MONITOR:
469 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
470 local->cooked_mntrs--;
471 break;
472 }
473
474 local->monitors--;
e8975581 475 if (local->monitors == 0) {
0869aea0
JB
476 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
477 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
e8975581 478 }
0d143fe1
JB
479
480 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
481 local->fif_fcsfail--;
482 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
483 local->fif_plcpfail--;
e3b90ca2
IP
484 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
485 local->fif_pspoll--;
0d143fe1 486 local->fif_control--;
e3b90ca2 487 }
0d143fe1
JB
488 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
489 local->fif_other_bss--;
490
0d143fe1 491 ieee80211_configure_filter(local);
0d143fe1 492 break;
0d143fe1
JB
493 case NL80211_IFTYPE_MESH_POINT:
494 if (ieee80211_vif_is_mesh(&sdata->vif)) {
a3c9aa51
AY
495 /* other_bss and allmulti are always set on mesh
496 * ifaces */
497 local->fif_other_bss--;
0d143fe1 498 atomic_dec(&local->iff_allmultis);
a3c9aa51 499
a3c9aa51 500 ieee80211_configure_filter(local);
a3c9aa51 501
0d143fe1
JB
502 ieee80211_stop_mesh(sdata);
503 }
504 /* fall through */
505 default:
c1475ca9 506 flush_work(&sdata->work);
35f20c14
JB
507 /*
508 * When we get here, the interface is marked down.
509 * Call synchronize_rcu() to wait for the RX path
510 * should it be using the interface and enqueuing
511 * frames at this very time on another CPU.
512 */
513 synchronize_rcu();
514 skb_queue_purge(&sdata->skb_queue);
515
15db0b7f
JB
516 if (local->scan_sdata == sdata)
517 ieee80211_scan_cancel(local);
0d143fe1 518
97af7432 519 /*
b9dcf712
JB
520 * Disable beaconing here for mesh only, AP and IBSS
521 * are already taken care of.
97af7432 522 */
b9dcf712 523 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
97af7432
BC
524 ieee80211_bss_info_change_notify(sdata,
525 BSS_CHANGED_BEACON_ENABLED);
97af7432 526
b9dcf712
JB
527 /*
528 * Free all remaining keys, there shouldn't be any,
529 * except maybe group keys in AP more or WDS?
530 */
ad0e2b5a 531 ieee80211_free_keys(sdata);
b9dcf712 532
34d4bc4d
JB
533 if (going_down)
534 drv_remove_interface(local, &sdata->vif);
0d143fe1
JB
535 }
536
537 sdata->bss = NULL;
538
7da7cc1d 539 mutex_lock(&local->mtx);
5cff20e6 540 hw_reconf_flags |= __ieee80211_recalc_idle(local);
7da7cc1d 541 mutex_unlock(&local->mtx);
5cff20e6
JB
542
543 ieee80211_recalc_ps(local, -1);
544
0d143fe1 545 if (local->open_count == 0) {
4e6cbfd0
JL
546 if (local->ops->napi_poll)
547 napi_disable(&local->napi);
ea77f12f 548 ieee80211_clear_tx_pending(local);
84f6a01c 549 ieee80211_stop_device(local);
0d143fe1 550
e8975581
JB
551 /* no reconfiguring after stop! */
552 hw_reconf_flags = 0;
0d143fe1
JB
553 }
554
e8975581
JB
555 /* do after stop to avoid reconfiguring when we stop anyway */
556 if (hw_reconf_flags)
557 ieee80211_hw_config(local, hw_reconf_flags);
558
5061b0c2
JB
559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
560 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
561 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
562 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
563 if (info->control.vif == &sdata->vif) {
564 __skb_unlink(skb, &local->pending[i]);
565 dev_kfree_skb_irq(skb);
566 }
567 }
568 }
569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
34d4bc4d
JB
570}
571
572static int ieee80211_stop(struct net_device *dev)
573{
574 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
575
576 ieee80211_do_stop(sdata, true);
5061b0c2 577
0d143fe1
JB
578 return 0;
579}
580
581static void ieee80211_set_multicast_list(struct net_device *dev)
582{
0d143fe1 583 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
b4a4bf5d 584 struct ieee80211_local *local = sdata->local;
0d143fe1
JB
585 int allmulti, promisc, sdata_allmulti, sdata_promisc;
586
587 allmulti = !!(dev->flags & IFF_ALLMULTI);
588 promisc = !!(dev->flags & IFF_PROMISC);
589 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
590 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
591
592 if (allmulti != sdata_allmulti) {
593 if (dev->flags & IFF_ALLMULTI)
594 atomic_inc(&local->iff_allmultis);
595 else
596 atomic_dec(&local->iff_allmultis);
597 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
598 }
599
600 if (promisc != sdata_promisc) {
601 if (dev->flags & IFF_PROMISC)
602 atomic_inc(&local->iff_promiscs);
603 else
604 atomic_dec(&local->iff_promiscs);
605 sdata->flags ^= IEEE80211_SDATA_PROMISC;
606 }
3b8d81e0 607 spin_lock_bh(&local->filter_lock);
22bedad3 608 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
3b8d81e0 609 spin_unlock_bh(&local->filter_lock);
3ac64bee 610 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
0d143fe1
JB
611}
612
75636525
JB
613/*
614 * Called when the netdev is removed or, by the code below, before
615 * the interface type changes.
616 */
617static void ieee80211_teardown_sdata(struct net_device *dev)
f0706e82 618{
75636525
JB
619 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
620 struct ieee80211_local *local = sdata->local;
75636525 621 int flushed;
f0706e82
JB
622 int i;
623
75636525
JB
624 /* free extra data */
625 ieee80211_free_keys(sdata);
626
aee14ceb
JM
627 ieee80211_debugfs_remove_netdev(sdata);
628
f0706e82 629 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
75636525
JB
630 __skb_queue_purge(&sdata->fragments[i].skb_list);
631 sdata->fragment_next = 0;
11a843b7 632
b9dcf712
JB
633 if (ieee80211_vif_is_mesh(&sdata->vif))
634 mesh_rmc_free(sdata);
75636525
JB
635
636 flushed = sta_info_flush(local, sdata);
637 WARN_ON(flushed);
f0706e82
JB
638}
639
cf0277e7
JB
640static u16 ieee80211_netdev_select_queue(struct net_device *dev,
641 struct sk_buff *skb)
642{
643 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
644}
645
587e729e
JB
646static const struct net_device_ops ieee80211_dataif_ops = {
647 .ndo_open = ieee80211_open,
648 .ndo_stop = ieee80211_stop,
649 .ndo_uninit = ieee80211_teardown_sdata,
650 .ndo_start_xmit = ieee80211_subif_start_xmit,
651 .ndo_set_multicast_list = ieee80211_set_multicast_list,
652 .ndo_change_mtu = ieee80211_change_mtu,
47846c9b 653 .ndo_set_mac_address = ieee80211_change_mac,
cf0277e7 654 .ndo_select_queue = ieee80211_netdev_select_queue,
587e729e
JB
655};
656
cf0277e7
JB
657static u16 ieee80211_monitor_select_queue(struct net_device *dev,
658 struct sk_buff *skb)
659{
660 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
661 struct ieee80211_local *local = sdata->local;
662 struct ieee80211_hdr *hdr;
663 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
193e70ef 664 u8 *p;
cf0277e7
JB
665
666 if (local->hw.queues < 4)
667 return 0;
668
669 if (skb->len < 4 ||
b49bb574 670 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
cf0277e7
JB
671 return 0; /* doesn't matter, frame will be dropped */
672
b49bb574 673 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
cf0277e7 674
861a57cd 675 if (!ieee80211_is_data(hdr->frame_control)) {
cf0277e7
JB
676 skb->priority = 7;
677 return ieee802_1d_to_ac[skb->priority];
678 }
861a57cd
FF
679 if (!ieee80211_is_data_qos(hdr->frame_control)) {
680 skb->priority = 0;
681 return ieee802_1d_to_ac[skb->priority];
682 }
cf0277e7 683
193e70ef
FF
684 p = ieee80211_get_qos_ctl(hdr);
685 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
686
cf0277e7
JB
687 return ieee80211_downgrade_queue(local, skb);
688}
689
587e729e
JB
690static const struct net_device_ops ieee80211_monitorif_ops = {
691 .ndo_open = ieee80211_open,
692 .ndo_stop = ieee80211_stop,
693 .ndo_uninit = ieee80211_teardown_sdata,
694 .ndo_start_xmit = ieee80211_monitor_start_xmit,
695 .ndo_set_multicast_list = ieee80211_set_multicast_list,
696 .ndo_change_mtu = ieee80211_change_mtu,
697 .ndo_set_mac_address = eth_mac_addr,
cf0277e7 698 .ndo_select_queue = ieee80211_monitor_select_queue,
587e729e
JB
699};
700
701static void ieee80211_if_setup(struct net_device *dev)
702{
703 ether_setup(dev);
704 dev->netdev_ops = &ieee80211_dataif_ops;
587e729e
JB
705 dev->destructor = free_netdev;
706}
707
1fa57d01
JB
708static void ieee80211_iface_work(struct work_struct *work)
709{
710 struct ieee80211_sub_if_data *sdata =
711 container_of(work, struct ieee80211_sub_if_data, work);
712 struct ieee80211_local *local = sdata->local;
713 struct sk_buff *skb;
344eec67 714 struct sta_info *sta;
c1475ca9 715 struct ieee80211_ra_tid *ra_tid;
1fa57d01
JB
716
717 if (!ieee80211_sdata_running(sdata))
718 return;
719
720 if (local->scanning)
721 return;
722
723 /*
724 * ieee80211_queue_work() should have picked up most cases,
725 * here we'll pick the rest.
726 */
727 if (WARN(local->suspended,
728 "interface work scheduled while going to suspend\n"))
729 return;
730
731 /* first process frames */
732 while ((skb = skb_dequeue(&sdata->skb_queue))) {
bed7ee6e
JB
733 struct ieee80211_mgmt *mgmt = (void *)skb->data;
734
c1475ca9
JB
735 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
736 ra_tid = (void *)&skb->cb;
737 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
738 ra_tid->tid);
739 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
740 ra_tid = (void *)&skb->cb;
741 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
742 ra_tid->tid);
743 } else if (ieee80211_is_action(mgmt->frame_control) &&
744 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
bed7ee6e 745 int len = skb->len;
bed7ee6e 746
a93e3644 747 mutex_lock(&local->sta_mtx);
875ae5f6 748 sta = sta_info_get_bss(sdata, mgmt->sa);
bed7ee6e
JB
749 if (sta) {
750 switch (mgmt->u.action.u.addba_req.action_code) {
751 case WLAN_ACTION_ADDBA_REQ:
752 ieee80211_process_addba_request(
753 local, sta, mgmt, len);
754 break;
755 case WLAN_ACTION_ADDBA_RESP:
756 ieee80211_process_addba_resp(local, sta,
757 mgmt, len);
758 break;
759 case WLAN_ACTION_DELBA:
760 ieee80211_process_delba(sdata, sta,
761 mgmt, len);
762 break;
763 default:
764 WARN_ON(1);
765 break;
766 }
767 }
a93e3644 768 mutex_unlock(&local->sta_mtx);
344eec67
JB
769 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
770 struct ieee80211_hdr *hdr = (void *)mgmt;
771 /*
772 * So the frame isn't mgmt, but frame_control
773 * is at the right place anyway, of course, so
774 * the if statement is correct.
775 *
776 * Warn if we have other data frame types here,
777 * they must not get here.
778 */
779 WARN_ON(hdr->frame_control &
780 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
781 WARN_ON(!(hdr->seq_ctrl &
782 cpu_to_le16(IEEE80211_SCTL_FRAG)));
783 /*
784 * This was a fragment of a frame, received while
785 * a block-ack session was active. That cannot be
786 * right, so terminate the session.
787 */
a93e3644 788 mutex_lock(&local->sta_mtx);
875ae5f6 789 sta = sta_info_get_bss(sdata, mgmt->sa);
344eec67
JB
790 if (sta) {
791 u16 tid = *ieee80211_get_qos_ctl(hdr) &
792 IEEE80211_QOS_CTL_TID_MASK;
793
794 __ieee80211_stop_rx_ba_session(
795 sta, tid, WLAN_BACK_RECIPIENT,
796 WLAN_REASON_QSTA_REQUIRE_SETUP);
797 }
a93e3644 798 mutex_unlock(&local->sta_mtx);
bed7ee6e 799 } else switch (sdata->vif.type) {
1fa57d01
JB
800 case NL80211_IFTYPE_STATION:
801 ieee80211_sta_rx_queued_mgmt(sdata, skb);
802 break;
803 case NL80211_IFTYPE_ADHOC:
804 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
805 break;
806 case NL80211_IFTYPE_MESH_POINT:
807 if (!ieee80211_vif_is_mesh(&sdata->vif))
808 break;
809 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
810 break;
811 default:
812 WARN(1, "frame for unexpected interface type");
1fa57d01
JB
813 break;
814 }
36b3a628
JB
815
816 kfree_skb(skb);
1fa57d01
JB
817 }
818
819 /* then other type-dependent work */
820 switch (sdata->vif.type) {
821 case NL80211_IFTYPE_STATION:
822 ieee80211_sta_work(sdata);
823 break;
824 case NL80211_IFTYPE_ADHOC:
825 ieee80211_ibss_work(sdata);
826 break;
827 case NL80211_IFTYPE_MESH_POINT:
828 if (!ieee80211_vif_is_mesh(&sdata->vif))
829 break;
830 ieee80211_mesh_work(sdata);
831 break;
832 default:
833 break;
834 }
835}
836
837
75636525
JB
838/*
839 * Helper function to initialise an interface to a specific type.
840 */
841static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
05c914fe 842 enum nl80211_iftype type)
f0706e82 843{
75636525
JB
844 /* clear type-dependent union */
845 memset(&sdata->u, 0, sizeof(sdata->u));
846
847 /* and set some type-dependent values */
848 sdata->vif.type = type;
2ca27bcf 849 sdata->vif.p2p = false;
587e729e 850 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
60719ffd 851 sdata->wdev.iftype = type;
75636525 852
a621fa4d
JB
853 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
854 sdata->control_port_no_encrypt = false;
855
75636525
JB
856 /* only monitor differs */
857 sdata->dev->type = ARPHRD_ETHER;
858
35f20c14 859 skb_queue_head_init(&sdata->skb_queue);
1fa57d01 860 INIT_WORK(&sdata->work, ieee80211_iface_work);
35f20c14 861
75636525 862 switch (type) {
2ca27bcf
JB
863 case NL80211_IFTYPE_P2P_GO:
864 type = NL80211_IFTYPE_AP;
865 sdata->vif.type = type;
866 sdata->vif.p2p = true;
867 /* fall through */
05c914fe 868 case NL80211_IFTYPE_AP:
75636525
JB
869 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
870 INIT_LIST_HEAD(&sdata->u.ap.vlans);
871 break;
2ca27bcf
JB
872 case NL80211_IFTYPE_P2P_CLIENT:
873 type = NL80211_IFTYPE_STATION;
874 sdata->vif.type = type;
875 sdata->vif.p2p = true;
876 /* fall through */
05c914fe 877 case NL80211_IFTYPE_STATION:
9c6bd790 878 ieee80211_sta_setup_sdata(sdata);
472dbc45 879 break;
46900298
JB
880 case NL80211_IFTYPE_ADHOC:
881 ieee80211_ibss_setup_sdata(sdata);
882 break;
05c914fe 883 case NL80211_IFTYPE_MESH_POINT:
75636525
JB
884 if (ieee80211_vif_is_mesh(&sdata->vif))
885 ieee80211_mesh_init_sdata(sdata);
886 break;
05c914fe 887 case NL80211_IFTYPE_MONITOR:
75636525 888 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
587e729e 889 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
75636525
JB
890 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
891 MONITOR_FLAG_OTHER_BSS;
892 break;
05c914fe
JB
893 case NL80211_IFTYPE_WDS:
894 case NL80211_IFTYPE_AP_VLAN:
75636525 895 break;
05c914fe 896 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 897 case NUM_NL80211_IFTYPES:
75636525
JB
898 BUG();
899 break;
900 }
901
902 ieee80211_debugfs_add_netdev(sdata);
903}
904
34d4bc4d
JB
905static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
906 enum nl80211_iftype type)
907{
908 struct ieee80211_local *local = sdata->local;
909 int ret, err;
2ca27bcf
JB
910 enum nl80211_iftype internal_type = type;
911 bool p2p = false;
34d4bc4d
JB
912
913 ASSERT_RTNL();
914
915 if (!local->ops->change_interface)
916 return -EBUSY;
917
918 switch (sdata->vif.type) {
919 case NL80211_IFTYPE_AP:
920 case NL80211_IFTYPE_STATION:
921 case NL80211_IFTYPE_ADHOC:
922 /*
923 * Could maybe also all others here?
924 * Just not sure how that interacts
925 * with the RX/config path e.g. for
926 * mesh.
927 */
928 break;
929 default:
930 return -EBUSY;
931 }
932
933 switch (type) {
934 case NL80211_IFTYPE_AP:
935 case NL80211_IFTYPE_STATION:
936 case NL80211_IFTYPE_ADHOC:
937 /*
938 * Could probably support everything
939 * but WDS here (WDS do_open can fail
940 * under memory pressure, which this
941 * code isn't prepared to handle).
942 */
943 break;
2ca27bcf
JB
944 case NL80211_IFTYPE_P2P_CLIENT:
945 p2p = true;
946 internal_type = NL80211_IFTYPE_STATION;
947 break;
948 case NL80211_IFTYPE_P2P_GO:
949 p2p = true;
950 internal_type = NL80211_IFTYPE_AP;
951 break;
34d4bc4d
JB
952 default:
953 return -EBUSY;
954 }
955
2ca27bcf 956 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
34d4bc4d
JB
957 if (ret)
958 return ret;
959
960 ieee80211_do_stop(sdata, false);
961
962 ieee80211_teardown_sdata(sdata->dev);
963
2ca27bcf 964 ret = drv_change_interface(local, sdata, internal_type, p2p);
34d4bc4d
JB
965 if (ret)
966 type = sdata->vif.type;
967
968 ieee80211_setup_sdata(sdata, type);
969
970 err = ieee80211_do_open(sdata->dev, false);
971 WARN(err, "type change: do_open returned %d", err);
972
973 return ret;
974}
975
f3947e2d 976int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
05c914fe 977 enum nl80211_iftype type)
75636525 978{
34d4bc4d
JB
979 int ret;
980
f3947e2d
JB
981 ASSERT_RTNL();
982
2ca27bcf 983 if (type == ieee80211_vif_type_p2p(&sdata->vif))
f3947e2d
JB
984 return 0;
985
e60c7744 986 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
dcebf45c
PR
987 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
988 type == NL80211_IFTYPE_ADHOC)
e60c7744
JB
989 return -EOPNOTSUPP;
990
34d4bc4d
JB
991 if (ieee80211_sdata_running(sdata)) {
992 ret = ieee80211_runtime_change_iftype(sdata, type);
993 if (ret)
994 return ret;
995 } else {
996 /* Purge and reset type-dependent state. */
997 ieee80211_teardown_sdata(sdata->dev);
998 ieee80211_setup_sdata(sdata, type);
999 }
75636525
JB
1000
1001 /* reset some values that shouldn't be kept across type changes */
bda3933a 1002 sdata->vif.bss_conf.basic_rates =
96dd22ac
JB
1003 ieee80211_mandatory_rates(sdata->local,
1004 sdata->local->hw.conf.channel->band);
75636525 1005 sdata->drop_unencrypted = 0;
9bc383de
JB
1006 if (type == NL80211_IFTYPE_STATION)
1007 sdata->u.mgd.use_4addr = false;
f3947e2d
JB
1008
1009 return 0;
f0706e82
JB
1010}
1011
fa9029f8
JB
1012static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1013 struct net_device *dev,
1014 enum nl80211_iftype type)
1015{
1016 struct ieee80211_sub_if_data *sdata;
1017 u64 mask, start, addr, val, inc;
1018 u8 *m;
1019 u8 tmp_addr[ETH_ALEN];
1020 int i;
1021
1022 /* default ... something at least */
1023 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1024
1025 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1026 local->hw.wiphy->n_addresses <= 1)
1027 return;
1028
1029
1030 mutex_lock(&local->iflist_mtx);
1031
1032 switch (type) {
1033 case NL80211_IFTYPE_MONITOR:
1034 /* doesn't matter */
1035 break;
1036 case NL80211_IFTYPE_WDS:
1037 case NL80211_IFTYPE_AP_VLAN:
1038 /* match up with an AP interface */
1039 list_for_each_entry(sdata, &local->interfaces, list) {
1040 if (sdata->vif.type != NL80211_IFTYPE_AP)
1041 continue;
1042 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1043 break;
1044 }
1045 /* keep default if no AP interface present */
1046 break;
1047 default:
1048 /* assign a new address if possible -- try n_addresses first */
1049 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1050 bool used = false;
1051
1052 list_for_each_entry(sdata, &local->interfaces, list) {
1053 if (memcmp(local->hw.wiphy->addresses[i].addr,
1054 sdata->vif.addr, ETH_ALEN) == 0) {
1055 used = true;
1056 break;
1057 }
1058 }
1059
1060 if (!used) {
1061 memcpy(dev->perm_addr,
1062 local->hw.wiphy->addresses[i].addr,
1063 ETH_ALEN);
1064 break;
1065 }
1066 }
1067
1068 /* try mask if available */
1069 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1070 break;
1071
1072 m = local->hw.wiphy->addr_mask;
1073 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1074 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1075 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1076
1077 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1078 /* not a contiguous mask ... not handled now! */
1079 printk(KERN_DEBUG "not contiguous\n");
1080 break;
1081 }
1082
1083 m = local->hw.wiphy->perm_addr;
1084 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1085 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1086 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1087
1088 inc = 1ULL<<__ffs64(mask);
1089 val = (start & mask);
1090 addr = (start & ~mask) | (val & mask);
1091 do {
1092 bool used = false;
1093
1094 tmp_addr[5] = addr >> 0*8;
1095 tmp_addr[4] = addr >> 1*8;
1096 tmp_addr[3] = addr >> 2*8;
1097 tmp_addr[2] = addr >> 3*8;
1098 tmp_addr[1] = addr >> 4*8;
1099 tmp_addr[0] = addr >> 5*8;
1100
1101 val += inc;
1102
1103 list_for_each_entry(sdata, &local->interfaces, list) {
1104 if (memcmp(tmp_addr, sdata->vif.addr,
1105 ETH_ALEN) == 0) {
1106 used = true;
1107 break;
1108 }
1109 }
1110
1111 if (!used) {
1112 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1113 break;
1114 }
1115 addr = (start & ~mask) | (val & mask);
1116 } while (addr != start);
1117
1118 break;
1119 }
1120
1121 mutex_unlock(&local->iflist_mtx);
1122}
1123
3e122be0 1124int ieee80211_if_add(struct ieee80211_local *local, const char *name,
05c914fe 1125 struct net_device **new_dev, enum nl80211_iftype type,
ee385855 1126 struct vif_params *params)
f0706e82
JB
1127{
1128 struct net_device *ndev;
f0706e82 1129 struct ieee80211_sub_if_data *sdata = NULL;
75636525 1130 int ret, i;
f0706e82
JB
1131
1132 ASSERT_RTNL();
75636525 1133
cf0277e7
JB
1134 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1135 name, ieee80211_if_setup, local->hw.queues);
f0706e82
JB
1136 if (!ndev)
1137 return -ENOMEM;
a272a720 1138 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
f0706e82 1139
f3994ece
JB
1140 ndev->needed_headroom = local->tx_headroom +
1141 4*6 /* four MAC addresses */
1142 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1143 + 6 /* mesh */
1144 + 8 /* rfc1042/bridge tunnel */
1145 - ETH_HLEN /* ethernet hard_header_len */
1146 + IEEE80211_ENCRYPT_HEADROOM;
1147 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1148
f0706e82
JB
1149 ret = dev_alloc_name(ndev, ndev->name);
1150 if (ret < 0)
1151 goto fail;
1152
fa9029f8
JB
1153 ieee80211_assign_perm_addr(local, ndev, type);
1154 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
f0706e82
JB
1155 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1156
3e122be0
JB
1157 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1158 sdata = netdev_priv(ndev);
f0706e82 1159 ndev->ieee80211_ptr = &sdata->wdev;
47846c9b
JB
1160 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1161 memcpy(sdata->name, ndev->name, IFNAMSIZ);
75636525
JB
1162
1163 /* initialise type-independent data */
f0706e82 1164 sdata->wdev.wiphy = local->hw.wiphy;
f0706e82 1165 sdata->local = local;
75636525 1166 sdata->dev = ndev;
68542962
JO
1167#ifdef CONFIG_INET
1168 sdata->arp_filter_state = true;
1169#endif
75636525
JB
1170
1171 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1172 skb_queue_head_init(&sdata->fragments[i].skb_list);
1173
1174 INIT_LIST_HEAD(&sdata->key_list);
1175
37eb0b16
JM
1176 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1177 struct ieee80211_supported_band *sband;
1178 sband = local->hw.wiphy->bands[i];
1179 sdata->rc_rateidx_mask[i] =
1180 sband ? (1 << sband->n_bitrates) - 1 : 0;
1181 }
75636525
JB
1182
1183 /* setup type-dependent data */
1184 ieee80211_setup_sdata(sdata, type);
f0706e82 1185
9bc383de
JB
1186 if (params) {
1187 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1188 if (type == NL80211_IFTYPE_STATION)
1189 sdata->u.mgd.use_4addr = params->use_4addr;
1190 }
1191
f0706e82
JB
1192 ret = register_netdevice(ndev);
1193 if (ret)
1194 goto fail;
1195
902acc78
JB
1196 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1197 params && params->mesh_id_len)
472dbc45
JB
1198 ieee80211_sdata_set_mesh_id(sdata,
1199 params->mesh_id_len,
1200 params->mesh_id);
ee385855 1201
c771c9d8 1202 mutex_lock(&local->iflist_mtx);
79010420 1203 list_add_tail_rcu(&sdata->list, &local->interfaces);
c771c9d8 1204 mutex_unlock(&local->iflist_mtx);
79010420 1205
f0706e82
JB
1206 if (new_dev)
1207 *new_dev = ndev;
f0706e82 1208
f0706e82
JB
1209 return 0;
1210
75636525 1211 fail:
f0706e82
JB
1212 free_netdev(ndev);
1213 return ret;
1214}
1215
f698d856 1216void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
f0706e82 1217{
f0706e82 1218 ASSERT_RTNL();
11a843b7 1219
c771c9d8 1220 mutex_lock(&sdata->local->iflist_mtx);
75636525 1221 list_del_rcu(&sdata->list);
c771c9d8
JB
1222 mutex_unlock(&sdata->local->iflist_mtx);
1223
75636525 1224 synchronize_rcu();
f698d856 1225 unregister_netdevice(sdata->dev);
f0706e82
JB
1226}
1227
75636525
JB
1228/*
1229 * Remove all interfaces, may only be called at hardware unregistration
1230 * time because it doesn't do RCU-safe list removals.
1231 */
1232void ieee80211_remove_interfaces(struct ieee80211_local *local)
f0706e82 1233{
75636525 1234 struct ieee80211_sub_if_data *sdata, *tmp;
efe117ab 1235 LIST_HEAD(unreg_list);
f0706e82
JB
1236
1237 ASSERT_RTNL();
1238
efe117ab 1239 mutex_lock(&local->iflist_mtx);
75636525
JB
1240 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1241 list_del(&sdata->list);
c771c9d8 1242
efe117ab 1243 unregister_netdevice_queue(sdata->dev, &unreg_list);
f0706e82 1244 }
efe117ab
ED
1245 mutex_unlock(&local->iflist_mtx);
1246 unregister_netdevice_many(&unreg_list);
f0706e82 1247}
5cff20e6
JB
1248
1249static u32 ieee80211_idle_off(struct ieee80211_local *local,
1250 const char *reason)
1251{
1252 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1253 return 0;
1254
1255#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec 1256 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
5cff20e6
JB
1257#endif
1258
1259 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1260 return IEEE80211_CONF_CHANGE_IDLE;
1261}
1262
1263static u32 ieee80211_idle_on(struct ieee80211_local *local)
1264{
1265 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1266 return 0;
1267
1268#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0fb9a9ec 1269 wiphy_debug(local->hw.wiphy, "device now idle\n");
5cff20e6
JB
1270#endif
1271
a80f7c0b
JB
1272 drv_flush(local, false);
1273
5cff20e6
JB
1274 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1275 return IEEE80211_CONF_CHANGE_IDLE;
1276}
1277
1278u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1279{
1280 struct ieee80211_sub_if_data *sdata;
1281 int count = 0;
7da7cc1d
JB
1282 bool working = false, scanning = false;
1283 struct ieee80211_work *wk;
5cff20e6 1284
7da7cc1d
JB
1285#ifdef CONFIG_PROVE_LOCKING
1286 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1287 !lockdep_is_held(&local->iflist_mtx));
1288#endif
1289 lockdep_assert_held(&local->mtx);
5cff20e6
JB
1290
1291 list_for_each_entry(sdata, &local->interfaces, list) {
7da7cc1d
JB
1292 if (!ieee80211_sdata_running(sdata)) {
1293 sdata->vif.bss_conf.idle = true;
5cff20e6 1294 continue;
7da7cc1d
JB
1295 }
1296
1297 sdata->old_idle = sdata->vif.bss_conf.idle;
1298
5cff20e6
JB
1299 /* do not count disabled managed interfaces */
1300 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
7da7cc1d
JB
1301 !sdata->u.mgd.associated) {
1302 sdata->vif.bss_conf.idle = true;
5cff20e6 1303 continue;
7da7cc1d 1304 }
5cff20e6
JB
1305 /* do not count unused IBSS interfaces */
1306 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
7da7cc1d
JB
1307 !sdata->u.ibss.ssid_len) {
1308 sdata->vif.bss_conf.idle = true;
5cff20e6 1309 continue;
7da7cc1d 1310 }
5cff20e6
JB
1311 /* count everything else */
1312 count++;
1313 }
1314
7da7cc1d
JB
1315 list_for_each_entry(wk, &local->work_list, list) {
1316 working = true;
1317 wk->sdata->vif.bss_conf.idle = false;
1318 }
1319
1320 if (local->scan_sdata) {
1321 scanning = true;
1322 local->scan_sdata->vif.bss_conf.idle = false;
1323 }
1324
1325 list_for_each_entry(sdata, &local->interfaces, list) {
1326 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1327 continue;
1328 if (!ieee80211_sdata_running(sdata))
1329 continue;
1330 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1331 }
1332
1333 if (working)
1334 return ieee80211_idle_off(local, "working");
1335 if (scanning)
1336 return ieee80211_idle_off(local, "scanning");
5cff20e6
JB
1337 if (!count)
1338 return ieee80211_idle_on(local);
1339 else
1340 return ieee80211_idle_off(local, "in use");
1341
1342 return 0;
1343}
1344
1345void ieee80211_recalc_idle(struct ieee80211_local *local)
1346{
1347 u32 chg;
1348
1349 mutex_lock(&local->iflist_mtx);
1350 chg = __ieee80211_recalc_idle(local);
1351 mutex_unlock(&local->iflist_mtx);
58905ca5
JB
1352 if (chg)
1353 ieee80211_hw_config(local, chg);
5cff20e6 1354}
47846c9b
JB
1355
1356static int netdev_notify(struct notifier_block *nb,
1357 unsigned long state,
1358 void *ndev)
1359{
1360 struct net_device *dev = ndev;
1361 struct ieee80211_sub_if_data *sdata;
1362
1363 if (state != NETDEV_CHANGENAME)
1364 return 0;
1365
1366 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1367 return 0;
1368
1369 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1370 return 0;
1371
1372 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1373
2f5265e6 1374 memcpy(sdata->name, dev->name, IFNAMSIZ);
47846c9b
JB
1375
1376 ieee80211_debugfs_rename_netdev(sdata);
1377 return 0;
1378}
1379
1380static struct notifier_block mac80211_netdev_notifier = {
1381 .notifier_call = netdev_notify,
1382};
1383
1384int ieee80211_iface_init(void)
1385{
1386 return register_netdevice_notifier(&mac80211_netdev_notifier);
1387}
1388
1389void ieee80211_iface_exit(void)
1390{
1391 unregister_netdevice_notifier(&mac80211_netdev_notifier);
1392}